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Title:
AUTOMOBILE SLIDING PREVENTION FLAG
Document Type and Number:
WIPO Patent Application WO/2008/150132
Kind Code:
A1
Abstract:
An automobile sliding preventing flag is disclosed, which makes it possible to easily perform a lightness and dry work since moisture is not contained, and it is possible to prevent spreading of pieces broken due to a damage during a centrifugal force or friction vibration when an automobile runs for thereby preventing any possible accidents. A single or double layer structure spike closely contacted with double wheels in a V shape is connected with a connection means and is wound on the double wheels for thereby connecting both ends of the connection means in an integrated structure along with the clamp engaged with a knuckle shaped connector unit.

Inventors:
YOON SOO-HAK (KR)
YOON SXUNG-HWAN (KR)
Application Number:
PCT/KR2008/003183
Publication Date:
December 11, 2008
Filing Date:
June 05, 2008
Export Citation:
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Assignee:
APEX TECH CO LTD (KR)
YOON SOO-HAK (KR)
YOON SXUNG-HWAN (KR)
International Classes:
B60C27/00
Foreign References:
KR200424423Y12006-08-22
US6863101B22005-03-08
KR20080013695A2008-02-13
KR100794048B12008-01-10
KR200289488Y12002-09-16
US6725894B22004-04-27
JPH09323516A1997-12-16
Attorney, Agent or Firm:
PARK, Youn-ho (1716-4 Seocho-dong Seocho-gu, Seoul 137-885, KR)
Download PDF:
Claims:
Claims

[1] In a sliding prevention flag in which spikes 10a closely inserted into double wheels in a V shape are connected with connection means 20a and 20b and are wound on the double wheels, and clamps 40 and 50 are engaged with the connector units 30a through 30e connecting both ends of the connection means 20a and 20b for thereby preventing sliding of an automobile which uses double wheels, an automobile sliding prevention flag characterized in that the spike 10a includes an insertion end 1 Ia, a rib 13a for reinforcing the close contact end 12a, and a support protrusion 14a provided between the ribs 13a in a rivet type, and a main plate 17a having a plurality of upwardly bent folding ends 16a on an outer side of the upper surface, and an escape prevention wire 18a is mounted on an upper side of the main plate 17a and is fixed as the folding end 16a is folded, and even when the main plate 17a is broken, since it is connected with the escape prevention wire 18a, the broken pieces are not spread.

[2] In a sliding prevention flag in which spikes 10b, 10c and 1Od closely inserted into double wheels in a V shape are connected with connection means 20a and 20b and are wound on the double wheels, and clamps 40 and 50 are engaged with the connector units 30a through 30e connecting both ends of the connection means 20a and 20b for thereby preventing sliding of an automobile which uses double wheels, an automobile sliding prevention flag characterized in that said spike 10b is positioned on the ground, and a main plate 14b includes a finish shoulder 13b uprightly formed along the outer sides of the upper surfaces of the insertion end 1 Ib and the close contact end 12b, and a sub plate 17b is engaged between the finish shoulders 13b of the main plate 14b and include an insertion end 15b and a close contact end 16b and contacts with an outer surface of the double wheels, and ribs 14b' and 17b' are longitudinally formed in the main plate 14b and the sub plate 17b for reinforcing, and the support protrusion 18b engaged in the rivet type is provided for preventing sliding, and a two-layer structure is provided, and even when one of the main plate 14b and the sub plate 17b is broken, the broken pieces are not escaped and spread.

[3] The flag of claim 2, wherein said spike 10c includes: a main plate 14c in which both ends of the insertion end l ie and the close contact end 12c are downwardly bent for thereby forming a support end 13c; a sub plate 17c which is mounted on an upper surface of the main plate 14c and

is formed of an insertion end 15c and a close contact end 16c; an escape prevention wire 18c which is disposed on an outer rim of an upper surface of the sub plate 17c and is inserted by inwardly bending an outer end of the sub plate 17c; and ribs 14c' and 17c' which are longitudinally formed in the main plate 14c and the sub plate 17c for reinforcement, and the support protrusion 19c is provided in rivet types for preventing sliding, and a two-layer structure is provided, and when one of the main plate 14c and the sub plate 17c is broken, the broken pieces are not escaped.

[4] The flag of claim 2, wherein said spike 1Od includes: a main plate 15d positioned on the ground, in which a rib 13d is formed in a longitudinal direction of the insertion end 1 Id and the close contact end 12d, and a support protrusion 14d is engaged in rivet type; and a protection plate 16d which is engaged to the insertion end 1 Id of the main plate 15d while surrounding the same and is made of plastic, metal, aluminum, copper or something, and when the cut surface occurs due to the breaking of the insertion end 1 Id, the cut surface does not contact with the double wheels.

[5] The flag of either claim 1 or claim 2, wherein said connection means 20a is formed of a " — " shaped metallic wire, and said connection means 20b is formed of a ring shaped metallic wire rope with both ends being connected, and a cylindrical protection ring 20c and a <χ> shaped protection ring 2Od are engaged to a portion connected to the spikes 10a through 1Od for preventing abrasion.

[6] The flag of either claim 1 or claim 2, wherein said connector unit 30a is formed in an integral longitudinal plate shape and includes a through hole 31a formed at its center portion for allowing the connection means 20a to pass, and a rack gear 32a is formed on its upper surface in a longitudinal direction, and when the connector unit 30a is broken, since it is connected with the connection means 20a, the broken pieces do not spread.

[7] The flag of either claim 1 or claim 2, wherein said connector unit 30b includes a through hole 31b formed at a center for allowing the connection means 20a to pass, and a plurality of gear knuckle pieces 33b having rack gears 32b on their upper surfaces, so the connector unit 30b is connected by means of the connection means 20a and is bent for thereby preventing escape.

[8] The flag of either claim 1 or claim 2, wherein said connector unit 30c is formed in an integral longitudinal shape and includes a through hole 31c formed at both

ends for allowing the connection means 20b to pass, and a plurality of engaging holes 32c formed at a center in a longitudinal direction, and when the connector unit 30c is broken, since it is connected with the connection means 20b, the broken pieces do not escape.

[9] The flag of either claim 1 or claim 2, wherein said connector unit 30d includes a through hole 3 Id at both ends for allowing the connection means 20b to pass, and a plurality of knuckle pieces 33d formed at a center and having a plurality of engaging holes 32d in a longitudinal direction, and the connector unit 30d is connected by means of the connection means 20b, so it does not escape and is bent.

[10] The flag of either claim 1 or claim 2, wherein said connector unit 30e is formed like two divide pieces 3 Ie are folded while facing each other and includes a through hole 32e at both ends for allowing the connection means 20b to pass, and a plurality of knuckle pieces 34e which are cut and have a plurality of engaging holes 33e at centers in a longitudinal direction, and a plurality of sub knuckle pieces 36e which have through holes 35e at both ends for engagement between the knuckle pieces 34e, and the knuckle pieces 34e and the sub knuckle pieces 36e are connected by means of the connection means 20b and do not escape and are bent.

[11] The flag of either claim 1 or claim 2, wherein said clamp 40 includes: a rectangular container shaped body 41 with its both ends being open, which includes an open hole 41a formed at its upper surface and being engaged with the engaging bushing 41b connected with the connection means 20a on its lower surface; a pinion gear 42 which is engaged to the fixing shaft 42a fixedly passing through the body 41 and is thread-engaged with the connector units 30a and 30b; a reverse rotation prevention flag 43 which is engaged to the fixing pin 43a fixed over the body 41 after being inserted through the open hole 41a of the body 41 and includes an engaging protrusion 43d formed at a lower surface of the handle

43c integrally extended from the reverse rotation prevention protrusion 43b for preventing the pinion gear 42 from rotating in an ejection direction of the connector units 30a and 30b, and engaging protrusions 43e and 43f at the upper and lower sides of the engaging protrusion 43d; and a torsion spring 44 which is engaged to the engaging protrusion 43d for allowing the reverse rotation prevention flag 43 to closely contact with the pinion gear 42

with its both ends being supported by means of the engaging protrusions 43e and 43f. [12] The flag of either claim 1 or claim 2, wherein said clamp 50 includes: a body unit 51 having a body 5 Id formed of an upright vertical piece 51c bent at both ends of the bottom piece 51b having an engaging ring 51a engaged with an escape prevention bolt shaft 51a' with a nut N fixed to the bolt B passing through in up and down directions so that one end is bent and caught by means of the connector units 30c through 30e and does not escape; a support unit 52 which includes a torsion spring 52b of which one end is fixed in one vertical piece 51c as being engaged to the fixing pin 52a fixed through the vertical piece 51c in an upper space spaced apart from the engaging ring 51a of the body unit 51 ; an engaging unit 53 which includes an engaging member 53b caught by means of the connector units 30c through 30e inserted into the body unit 51 while it is rotatably engaged in the up and down directions to the fixing pin 53a fixed as passing through the vertical piece 51c in the opposite upper space of the support unit 52 and while the upper end being oriented toward the support unit 52 is pressed by means of the non-fixed other end of the torsion spring 52b; and an escape prevention unit 54 which is formed of a bolt shaft 54b which presses an upper surface of the engaging member 53b of the end supported by means of the torsion spring 52b while passing through the center of the fixing piece 54a fixed as being mounted on the vertical piece 51c for surrounding the upper center of the body unit 51.

Description:

Description

AUTOMOBILE SLIDING PREVENTION FLAG

Technical Field

[1] The present invention relates to an automobile sliding prevention flag, and in particular to an automobile sliding preventing flag which makes it possible to easily perform a lightness and dry work since moisture is not contained, and it is possible to prevent spreading of pieces broken due to a damage during a centrifugal force or friction vibration when an automobile runs for thereby preventing any possible accidents.

[2]

Background Art

[3] Generally, it is known that an automobile sliding prevention apparatus is formed of a snow chain engaged to the wheels of an automobile for preventing sliding when a road is frozen due to snow or something. In a high accident possibility area such as in a highway or a damaged road, since it is impossible to engage a chain, a special tire structure such as a snow tire or a spike tire is used.

[4] It is known that the above automobile sliding prevention apparatus generally uses a trapezoid shaped chain with a cable or an integral snow chain connected in a block shape by means of urethane. In the above integral automobile sliding prevention apparatus, a connection ring or a connection cable may be disconnected or broken during an operation of an automobile, so the fixing force of an automobile sliding prevention apparatus may loose, whereby it is very dangerous that an automobile sliding prevention apparatus may be escaped from the wheels or may lose. In this case, it cannot be reused, which reads to a non-economical use of the apparatus.

[5] In addition, it is known that the conventional integral automobile sliding prevention apparatus has a problem that a woman driver or a weak or old person or a disabled person is not easy to engaged or disengage. When a driver meets a sudden snow road or a frozen road, it is impossible to quickly engage the apparatus. Since it is engaged while moving the automobile forward or backward, it is impossible to perform an engaging or disengaging work in a slope road.

[6] The integral automobile sliding prevention apparatus is basically designed to well be adapted to the tires of a common automobile. In case of a large size or truck for transporting passenger or freight, the rear wheels, which transfer driving force, are formed of double wheel structures (tires are used in double wheel structures for de-

creasing flat situations by decreasing the total weight applied to each tire), so the integral automobile sliding apparatus has a problem for engaging to a large size automobile having double wheel structures.

[7] The integral automobile sliding apparatus has very complicated problems for engaging or disengaging chains. When the integral automobile sliding apparatus, which is generally made for a passenger car, is engaged to a tire of a truck or a bus, the engaging fixing force and close contact force are decreased even when considering that a double tire width of a truck is narrow or its diameter is small, so an effective driving force and stop force can not be obtained.

[8] In order to overcome the above problems, a new automobile sliding apparatus is disclosed; in which a chain formed in a double wheel of a rear wheel structure of a large size automobile passes through a center (wheel) of a corresponding tire, and is engaged thereto in multiple numbers. However, the above automobile sliding apparatus has the following problems.

[9] Namely, since the conventional automobile sliding apparatus is engaged while passing through a wheel which corresponds to an engaging position surface of a tire on an outer circumference surface of a tire. As the tire rotates, the snot chain rotates along with the same. When a stop force is continuously applied to the tires which rotate at high speed, the intervals cannot be properly maintained, and the weight is concentrated on a snow chain, so the chain might be hurt or be disengaged.

[10] In the conventional automobile sliding apparatus, the weight might be concentrated on one portion, so the engaged portions of the snow chain fixed in multiple numbers may be disengaged, and the braking force may be offset, which might lead to a large accident while decreasing a safety.

[11] Since the conventional automobile sliding prevention apparatus is directed to directly engaging multiple spikes to a double wheel structure without any means for maintaining intervals, when an automobile runs on a non-uniform ground, the multiple snow chains may be concentrated in one direction while being tangled with each other. So, the braking force may be applied in a centrifugal force direction during a cornering work, and the automobile may run in a direction different from the steering direction for thereby causing accidents.

[12] In order to overcome the problems found in the conventional automobile sliding prevention apparatus, the Korean utility model registered number 20-424423 discloses the following features.

[13] Figures 1 and 2 show a typical example of the conventional automobile sliding

prevention apparatus.

[14] The conventional automobile sliding prevention apparatus 1 comprises a plurality of spikes 2 formed of an insertion end 2a of which its intermediate portion is bent in a V shape for thereby being inserted into a portion between the double wheels, and a close contact end 2b having a protrusion 2b' in a flat shape at both sides of the insertion end 2a while closely contacting with the surface of each tire; a chain 3 which connects the insertion ends 2a of the spikes 2; a connector unit 4 which has multiple length adjusting units 4c for adjusting the length at an opposite side of an engaging hole 4b engaged to the engaging protrusion 2c of the spike 2 engaged to the other end of the chain in a rear side of a ring 4a connected with an end of the chain 3, and an engaging unit 5 which is integrally formed at an end of longitudinal first and second support plates 5a and 5b and includes a hook 5c hooked to the chain 3, a longitudinal tightening end 5d which is disposed between the first and second support plates 5a and 5b, of which its intermediate portion is engaged with a hinge 5d', and a tensional force maintaining end 5e of which its one end is engaged to an inner end of the tightening end 5d with a hinge 5d', and its other end is formed of a tensional force maintaining end 5e having an integral engaging ring.

[15] In the conventional automobile sliding prevention apparatus 1, a V shaped insertion end 2a is inserted into a portion between the double wheels which form a rear wheel structure of a truck or something, and the spikes 2 are arranged along an outer surface of the double wheel structure. So, the apparatus is engaged to the double wheel structure along with an enhanced close contacting force by pulling the chain 3.

[16] An engaging hole 4b of the connector unit 4 engaged at an end of the chain 3 using a ring 4a is engaged at the engaging protrusion 2c of the spike 2, which is positioned at a last portion, in a state that the chain 3 maintains tight.

[17] The tensional force maintaining end 4f of the engaging unit 4 is engaged to the length adjusting unit 4b of the connector unit 4, and the hook 4c is engaged to the chain 3, and the tightening end 5d is folded, and the connector unit 4 and the engaging unit 4 keep a pulled state.

[18] In the conventional automobile sliding prevention apparatus 1 engaged to the double wheel structure, as the automobile runs, the protrusion 2b' supports an icy road or snowy road as the double wheel structure rotates, so the automobile can run without sliding with less noises and vibrations with the helps of thin thickness of the spike 2.

[19] However, the conventional automobile sliding prevention apparatus has a problem that a close contact unit may be easily hurt due to a distortion phenomenon that the

spikes are pulled by means of the rotational force of the double wheels which support a heavy thing.

[20] In addition, as the close contact ends of the spikes are hurt, a lot of damage pieces are produced and spread by means of the rotational force of the double wheels, and such pieces may directly hit the automobile for thereby damaging the automobile. The pieces so produced may hit another automobile which runs beside the automobile with the automobile sliding prevention apparatus for thereby damaging the automobile. As the automobile tries to avoid the pieces, a big traffic accident may occur.

[21] As the insertion ends of the spikes are hurt, and the metallic spikes are cut, the cut sharp surfaces may hit the inner sides of the double wheels for thereby hurting the double wheels, which might lead to a big accident.

[22] The connector unit connecting the automobile sliding prevention apparatus is formed of an integral metallic material. As the double wheels rotate, the spikes are first pulled, and then the chains are pulled. In this case, the connector unit may be broken by means of a sudden tensional force or vibrations occurring during the operation of the automobile.

[23] As the connector unit is broken, the automobile sliding prevention apparatus may be disengaged from the double wheels, and at the same time may be wound on the shaft of the double wheels, so the automobile may stop or the automobile sliding prevention apparatus so disengaged may be spread to the outside of the automobile for thereby hitting other automobiles and damaging other people. Accident may increase.

[24] In the conventional art, the engaging unit connecting the connector unit and the chain may be disengaged due to a centrifugal force by means of the rotation of the double wheel or may be broken like the connector unit, so the automobile sliding prevention apparatus might be loosened.

[25] In the industry, it is urgently to develop products having the features that even when a breaking phenomenon occurs by means of a centrifugal force due to a rotation of double wheels and a grounding vibration, broken pieces do not spread, and the engaging unit is not loosened or damaged, so the automobile sliding prevention apparatus is not escaped from the double wheels for thereby preventing the damage of automobile, and other automobiles are not hurt for thereby obtaining a desired safety.

[26]

Disclosure of Invention Technical Problem

[27] Accordingly, it is an object of the present invention to provide an automobile sliding prevention flag which overcomes the problems found in the conventional art and which is well adaptable depending on the state of a road surface condition contacting with double wheels by using spikes formed in various shapes.

[28] It is another object of the present invention to provide an automobile sliding prevention flag which makes it possible to prevent spreading of broken pieces even in case of damages by providing an escape preventing wire and two-layer structure spikes while preventing combined accidents and protecting double wheels as well as preventing any accidents due to the damages of the automobile.

[29] It is further another object of the present invention to provide an automobile sliding prevention flag in which a connection unit formed in an integral structure or a plurality of knuckle pieces connected to a connection means is formed and adapted depending on the size of double wheels and a bending stress. In case of integrated structure, loosening of chain is prevented as being connected with a connection means even when damage occurs, and in case that knuckle pieces are used, it might flexibly work with respect to bending stress as it bends, which leads to increasing safety.

[30] It is still further another object of the present invention to provide an automobile sliding prevention flag which might be well adapted depending on the characteristics of a connection means and a connection unit, so its universal use and its applicability are enhanced.

[31]

Technical Solution

[32] To achieve the above objects, in a sliding prevention flag in which spikes 10a closely inserted into double wheels in a V shape are connected with connection means 20a and 20b and are wound on the double wheels, and clamps 40 and 50 are engaged with the connector units 30a through 30e connecting both ends of the connection means 20a and 20b for thereby preventing sliding of an automobile which uses double wheels, there is provided an automobile sliding prevention flag characterized in that the spike 10a includes an insertion end 1 Ia, a rib 13a for reinforcing the close contact end 12a, and a support protrusion 14a provided between the ribs 13a in a rivet type, and a main plate 17a having a plurality of upwardly bent folding ends 16a on an outer side of the upper surface, and an escape prevention wire 18a is mounted on an upper side of the main plate 17a and is fixed as the folding end 16a is folded, and even when the main plate 17a is broken, since it is connected with the escape prevention wire 18a, the broken pieces are not spread.

[33] As another embodiment, in a sliding prevention flag in which spikes 10b, 10c and

1Od closely inserted into double wheels in a V shape are connected with connection means 20a and 20b and are wound on the double wheels, and clamps 40 and 50 are engaged with the connector units 30a through 30e connecting both ends of the connection means 20a and 20b for thereby preventing sliding of an automobile which uses double wheels, there is provided an automobile sliding prevention flag characterized in that the spike 10b is positioned on the ground, and a main plate 14b includes a finish shoulder 13b uprightly formed along the outer sides of the upper surfaces of the insertion end 1 Ib and the close contact end 12b, and a sub plate 17b is engaged between the finish shoulders 13b of the main plate 14b and include an insertion end 15b and a close contact end 16b and contacts with an outer surface of the double wheels, and ribs 14b' and 17b' are longitudinally formed in the main plate 14b and the sub plate 17b for reinforcing, and the support protrusion 18b engaged in the rivet type is provided for preventing sliding, and a two-layer structure is provided, and even when one of the main plate 14b and the sub plate 17b is broken, the broken pieces are not escaped and spread.

[34] The spike 10c includes a main plate 14c in which both ends of the insertion end l ie and the close contact end 12c are downwardly bent for thereby forming a support end 13c; a sub plate 17c which is mounted on an upper surface of the main plate 14c and is formed of an insertion end 15c and a close contact end 16c; an escape prevention wire 18c which is disposed on an outer rim of an upper surface of the sub plate 17c and is inserted by inwardly bending an outer end of the sub plate 17c; and ribs 14c' and 17c' which are longitudinally formed in the main plate 14c and the sub plate 17c for reinforcement, and the support protrusion 19c is provided in rivet types for preventing sliding, and a two-layer structure is provided, and when one of the main plate 14c and the sub plate 17c is broken, the broken pieces are not escaped.

[35] The spike 1Od includes a main plate 15d positioned on the ground, in which a rib 13d is formed in a longitudinal direction of the insertion end 1 Id and the close contact end 12d, and a support protrusion 14d is engaged in rivet type; and a protection plate 16d which is engaged to the insertion end 1 Id of the main plate 15d while surrounding the same and is made of plastic, metal, aluminum, copper or something, and when the cut surface occurs due to the breaking of the insertion end 1 Id, the cut surface does not contact with the double wheels.

[36] The connection means 20a is formed of a " — " shaped metallic wire, and the connection means 20b is formed of a ring shaped metallic wire rope with both ends

being connected, and a cylindrical protection ring 20c and a <χ> shaped protection ring 2Od are engaged to a portion connected to the spikes 10a through 1Od for preventing abrasion.

[37] The connector unit 30a is formed in an integral longitudinal plate shape and includes a through hole 31a formed at its center portion for allowing the connection means 20a to pass, and a rack gear 32a is formed on its upper surface in a longitudinal direction, and when the connector unit 30a is broken, since it is connected with the connection means 20a, the broken pieces do not spread.

[38] The connector unit 30b includes a through hole 31b formed at a center for allowing the connection means 20a to pass, and a plurality of gear knuckle pieces 33b having rack gears 32b on their upper surfaces, so the connector unit 30b is connected by means of the connection means 20a and is bent for thereby preventing escape.

[39] The connector unit 30c is formed in an integral longitudinal shape and includes a through hole 31c formed at both ends for allowing the connection means 20b to pass, and a plurality of engaging holes 32c formed at a center in a longitudinal direction, and when the connector unit 30c is broken, since it is connected with the connection means 20b, the broken pieces do not escape.

[40] The connector unit 30d includes a through hole 3 Id at both ends for allowing the connection means 20b to pass, and a plurality of knuckle pieces 33d formed at a center and having a plurality of engaging holes 32d in a longitudinal direction, and the connector unit 30d is connected by means of the connection means 20b, so it does not escape and is bent.

[41] The connector unit 30e is formed like two divide pieces 3 Ie are folded while facing each other and includes a through hole 32e at both ends for allowing the connection means 20b to pass, and a plurality of knuckle pieces 34e which are cut and have a plurality of engaging holes 33e at centers in a longitudinal direction, and a plurality of sub knuckle pieces 36e which have through holes 35e at both ends for engagement between the knuckle pieces 34e, and the knuckle pieces 34e and the sub knuckle pieces 36e are connected by means of the connection means 20b and do not escape and are bent.

[42] The clamp 40 includes a rectangular container shaped body 41 with its both ends being open, which includes an open hole 41a formed at its upper surface and being engaged with the engaging bushing 41b connected with the connection means 20a on its lower surface; a pinion gear 42 which is engaged to the fixing shaft 42a fixedly passing through the body 41 and is thread-engaged with the connector units 30a and

30b; a reverse rotation prevention flag 43 which is engaged to the fixing pin 43a fixed over the body 41 after being inserted through the open hole 41a of the body 41 and includes an engaging protrusion 43d formed at a lower surface of the handle 43c integrally extended from the reverse rotation prevention protrusion 43b for preventing the pinion gear 42 from rotating in an ejection direction of the connector units 30a and 30b, and engaging protrusions 43e and 43f at the upper and lower sides of the engaging protrusion 43d; and a torsion spring 44 which is engaged to the engaging protrusion 43d for allowing the reverse rotation prevention flag 43 to closely contact with the pinion gear 42 with its both ends being supported by means of the engaging protrusions 43e and 43f.

[43] The clamp 50 includes a body unit 51 having a body 5 Id formed of an upright vertical piece 51c bent at both ends of the bottom piece 51b having an engaging ring 51a engaged with an escape prevention bolt shaft 51a' with a nut N fixed to the bolt B passing through in up and down directions so that one end is bent and caught by means of the connector units 30c through 30e and does not escape; a support unit 52 which includes a torsion spring 52b of which one end is fixed in one vertical piece 51c as being engaged to the fixing pin 52a fixed through the vertical piece 51c in an upper space spaced apart from the engaging ring 51a of the body unit 51; an engaging unit 53 which includes an engaging member 53b caught by means of the connector units 30c through 30e inserted into the body unit 51 while it is rotatably engaged in the up and down directions to the fixing pin 53a fixed as passing through the vertical piece 51c in the opposite upper space of the support unit 52 and while the upper end being oriented toward the support unit 52 is pressed by means of the non-fixed other end of the torsion spring 52b; and an escape prevention unit 54 which is formed of a bolt shaft 54b which presses an upper surface of the engaging member 53b of the end supported by means of the torsion spring 52b while passing through the center of the fixing piece 54a fixed as being mounted on the vertical piece 51c for surrounding the upper center of the body unit 51.

[44]

Advantageous Effects

[45] As described above, the present invention is basically able to increase the applicability as the present invention can be variously adapted depending on the state of the road surface contacting with the double wheels by using spikes formed in various structures.

[46] In addition, even when the breaking phenomenon occurs the broken pieces do not

spread by providing the escape prevention wire and two-layer spike structures for thereby preventing combined accidents while protecting double wheels, and it is possible to prevent accidents which occur in relation with the damages of the vehicle.

[47] As an integral structure connected to the connection means is provided and the connector unit is formed of multiple knuckle pieces, it can be adapted depending on the sizes of the double wheels and the bending stress. In case of the integral structure, even when damages occur, since it is connected with a connection means, the sliding prevention flag is not loosened, and in case that the knuckle piece is used, it flexibly operates with respect to the bending stress since it bends, which leads to enhancing the safety.

[48] The applicability of the product can be widened by using the clamp which can be used depending on the characteristic based on the connection means and the connector unit.

[49]

Brief Description of the Drawings

[50] Figure 1 through 2 are perspective and use state views illustrating a conventional automobile sliding prevention flag.

[51] Figures 3 through 10 are disassembled perspective and cross sectional views illustrating a spike according to another example of the present invention.

[52] Figures 11 through 14 are views illustrating engagement states to a connection unit and a spike of another example of the present invention.

[53] Figures 15 through 19 are a perspective view of a connector unit connected to a " — " shaped connection means and an engaged perspective view engaged with the connector unit.

[54] Figures 28 through 30 are a perspective view of a clamp engaged with a connector unit connected to a " — " shaped connection means and an engaged conception view illustrating a connection state with the connector units.

[55] Figure 31 is a perspective view illustrating a clamp engaged with a connector unit connected to a ring shaped connection means.

[56] Figures 32 through 37 are engaged conception views illustrating a connection state that a connector unit connected to a ring shaped connection means is connected with the clamp of Figure 31.

[57]

[58] <Descriptions of major elements of drawings>

[59] 10a: spike 11a: insertion end

[60] 12a: close contact end 13a: rib

[61] 14a: support protrusion 15a: support end

[62] 16a: folding end 17a: main plate

[63] 18a: escape prevention wire 10b: spike

[64] 1 Ib: insertion end 12b: close contact end

[65] 13b: finish shoulder 14b: main plate

[66] 14b': rib 15b: insertion end

[67] 16b: close contact end 17b: sub-plate

[68] 17b': rib 10c: spike

[69] 1 Ic: insertion end 12c: close contact end

[70] 13c: support end 14c: main plate

[71] 14c': rib 15c: insertion end

[72] 16c: close contact end 17c: sub-plate

[73] 17c': rib 18c: escape prevention wire

[74] 19c: support protrusion 1Od: spike

[75] Hd: insertion end Hd': cutting surface

[76] 12d: close contact end 13d: rib

[77] 14d: support protrusion 15d: main plate

[78] 16d: protection plate 20a, 20b: connection means

[79] 30a: connector unit 31a: through hole

[80] 32a: rack gear 30b: connector unit

[81] 31b: through hole 32b: rack gear

[82] 33b: gear knuckle piece 30c: connector unit

[83] 31c: through hole 32c: engaging hole

[84] 30d: connector unit 3 Id: through hole

[85] 32d: engaging hole 33d: knuckle piece

[86] 30e: connector unit 3 Ie: divide piece

[87] 32e: through hole 33e: engaging hole

[88] 34e: knuckle piece 35e: through hole

[89] 36e: sub-knuckle piece 40: clamp

[90] 41 : body 41a: open hole

[91] 42: pinion gear 42a: fixing shaft

[92] 43: reverse rotation prevention unit 43a: fixing pin

[93] 43b: reverse rotation prevention protrusion 43c: handle

[94] 43d: engaging protrusion 43e, 43f: engaging protrusion

[95] 44: torsion spring 50: clamp

[96] 51: body unit 51a: engaging ring

[97] 51b: bottom piece 51c: vertical piece

[98] 5 Id: body 52: support

[99] 52a: fixing pin 52b: torsion spring

[100] 53: engaging unit 53a: fixing pin

[101] 53b: engaging member 54: escape prevention unit

[102] 54a: fixing piece 54b: bolt shaft

[103]

Best Mode for Carrying Out the Invention

[104] In a sliding prevention flag in which spikes 10a closely inserted into double wheels in a V shape are connected with connection means 20a and 20b and are wound on the double wheels, and clamps 40 and 50 are engaged with the connector units 30a through 30e connecting both ends of the connection means 20a and 20b for thereby preventing sliding of an automobile which uses double wheels, there is provided an automobile sliding prevention flag characterized in that the spike 10a includes an insertion end 1 Ia, a rib 13a for reinforcing the close contact end 12a, and a support protrusion 14a provided between the ribs 13a in a rivet type, and a main plate 17a having a plurality of upwardly bent folding ends 16a on an outer side of the upper surface, and an escape prevention wire 18a is mounted on an upper side of the main plate 17a and is fixed as the folding end 16a is folded, and even when the main plate 17a is broken, since it is connected with the escape prevention wire 18a, the broken pieces are not spread.

[105]

Mode for the Invention

[106] The preferred embodiments of the present invention will be described with reference to the accompanying drawings.

[107] Figures 11 through 14 are views illustrating engagement states to a connection unit and a spike of another example of the present invention. Figures 15 through 19 are a perspective view of a connector unit connected to a " — " shaped connection means and an engaged perspective view engaged with the connector unit. Figures 28 through 30 are a perspective view of a clamp engaged with a connector unit connected to a " — " shaped connection means and an engaged conception view illustrating a connection state with the connector units. Figure 31 is a perspective view illustrating a clamp

engaged with a connector unit connected to a ring shaped connection means. Figures 32 through 37 are engaged conception views illustrating a connection state that a connector unit connected to a ring shaped connection means is connected with the clamp of Figure 31.

[108] As shown therein, in the automobile sliding prevention flag, spikes 10a through 1Od closely inserted into double wheels in a V shape are connected with connection means 20a and 20b and are wound on the double wheels, and clamps 40 and 50 are engaged with connector units 30a through 30e connecting the ends of the connection means 20a and 20b.

[109] The spikes 10a of one layer among the spikes 10a through 1Od will be described.

[110] As shown in Figures 3 and 4, the main plate 17a forming the spike 10a includes an insertion end 11a, which has a V shape when viewing in a forward direction, a rib 13a which is horizontally extended from both ends of the insertion end 11a and is formed by pressing using a press machine for supporting a close contact end 12a closely contacting with an outer surface of the double wheel, and a support protrusion 14a provided between the ribs 13a in a rivet type.

[I l l] A support end 15a is downwardly protruded from a lower surface of the main plate 17a and contacts with a sliding surface, and a plurality of upwardly bent folding ends 16a are attached to an outer side of the upper surface.

[112] An escape prevention wire 18a is mounted on an upper side of the main plate 17a and is fixed as the folding end 16a is folded.

[113] The escape prevention wire 18a closely contacts with the folding end 16a along an outer rim when viewing the main plate 17a on a plane, and its both ends are connected by a welding method, and the folding end 16a is bent in an inward direction of the main plate 17a and is stably fixed.

[114] So, even when the main plate 17a is broken, the broken pieces are not spread since they are connected with the escape prevention wire 18a.

[115] The spikes 10b through 1Od of a two-layer structure will be described.

[116] As shown in Figure 5 and 6, the spike 10b is positioned on the ground, and the main plate 14b, in which the finish shoulder 13b is upright-formed along an upper outer side of the insertion end 1 Ib and the close contact end 12b, is provided. The sub-plate 17b contacts with an outer surface of the double wheels as the insertion end 15b and the close contact end 16b are engaged between the finish shoulders 13b of the main plate 14b.

[117] The sub plate 17b is smaller than the main plate 14b.

[118] Ribs 14b' and 17b' are longitudinally formed in the main plate 14b and the sub plate

17b, respectively, and are formed in two layers while preventing sliding with the help of the support protrusion 18b. [119] So, when one of the main plate 14b and the sub plate 17b is broken, broken pieces are not escaped. [120] As shown in Figures 7 and 8, in the spike 10c, there is provided a main plate 14c which forms a support end 13c in which both ends of the insertion end l ie and the close contact end 12c are downwardly bent and contact with the sliding surface. [121] A sub plate 17c formed of an insertion end 15c and a close contact end 16c is mounted on an upper surface of the main plate 14c and is engaged thereto. [122] The sub plate 17c is formed by bending a flat plate in the same shape as the main plate 14c, and an escape prevention wire 18c is mounted along an outer rim of the upper surface of the sub plate 17c. [123] The escape prevention wire 18c is mounted on an upper side of the sub plate 17c, and an outer end of the sub plate 17c is inwardly bent, and the escape prevention wire 18c is reliably engaged. [124] Ribs 14c' and 17c' are longitudinally formed in the main plate 14c and the sub plate

17c and are formed in a two-layer structure while preventing sliding with the help of the support protrusion 19c engaged in a rivet type. [125] So, even when one of the main plate 14c and the sub plate 17c is broken, broken pieces are not spread. [126] As shown in Figures 9 and 10, the spike 1Od is positioned on the ground, and a rib

13d is longitudinally formed in the insertion end 1 Id and the close contact end 12d, and the support protrusion 14d is formed in the main plate 15d in a rivet type. [127] A protection plate 16d made of a plastic, metal, aluminum, copper or something is engaged on an outer side of the insertion end 1 Id of the main plate 15d while surrounding the same. [128] Here, the protection plate 16d is able to prevent the cut surface, which is formed as the insertion end 1 Id forming the main plate 14d is broken, from contacting with the double wheels. The protection plate is engaged using the bolts and nuts which fix the connection means 20a and 20b engaged to the insertion end 1 Id. [129] A plurality of spikes 10a and spikes 10b through 1Od are arranged in a line shape, and are connected with the connection means 20a and 20b. [130] As shown in Figures 11 and 12, the connection means 20a is made of a " — " shaped metallic wire rope.

[131] As shown in Figures 13 and 14, the connection means 20b is formed of a ring shaped metallic wire with its both ends being connected with each other.

[132] The connection means 20a, which is arranged in one line, and the connection means 20b, which is arranged in two lines, are positioned in the insertion end 11a forming the main plate 17a of the spike 10a and in the inner surfaces of the insertion ends 1 Ib, l ie and Hd forming the spikes 10b through 1Od. The fixing plates 11a', l ib', l ie' and Hd' are attached, and the insertion ends 1 Ia, 1 Ib, 1 Ic and 1 Id and the fixing plates 1 Ia', 1 Ib', l ie' and 1 Id' are connected with the connection means in the bolt and nut engaging method while reliably pressing the connection means 20a.

[133] A cylindrical protection ring 20c and a oo-shaped protecting ring 2Od are formed at the contact portion of the connection means 20a and 20b connected to the spike 10a and the spikes 10b through 1Od for preventing abrasion occurring due to the compression and contact by means of the insertion ends 11a, 11 b, l ie and 1 Id and the fixing plates 11a', l ib', l ie' and Hd'.

[134] Here, the protection ring 20c and 2Od are formed of urethane materials having a high strength and durability in a cylindrical ring shape and are engaged with the connection means 20a and 20b and are fixed in the portion connected to the spike 10a.

[135] A tip made of tungsten or cemented carbide steel is engaged to the support protrusions 14a, 18b, 19c and 14d for minimizing abrasion due to contact with a sliding surface and enhancing support force.

[136] The spikes 10a are connected using a connection means 20a, and the spikes 10b through 1Od are connected using a connection 20b and are wound on the double wheel, and the connector units 30a through 30e connecting both ends of the connection means 20a and 20b are engaged with the clamps 40 and 50.

[137] The connector units 30a through 30e are engaged at one end of both ends of the connection means 20a and 20b, and the clamps 40 and 50 are engaged to the other end.

[138] The connector units 30a through 30e connected to the connection means 20a and 20b will be described.

[139] The connector units 30a and 30b are connected with the connection means when in use.

[140] As shown in Figures 15 and 16, the connector unit 30a is formed in an integral long plate shape with a through hole 31a being formed in its center for allowing the connection means 20a to pass.

[141] A rack gear 32a is formed on an upper surface of the connector unit 30a in a longitudinal direction of the connector unit 30a.

[142] So, even when the connector unit 30a is broken, since it is connected with the connection means 20a, broken pieces are not spread. [143] An engaging bushing 20a' is engaged at an end of the connection means 20a passing through the connector unit 30a for preventing the escape of the connector unit 30a. [144] On the contrary, the fixing bushing 20a" is supported by means of a rear end of the connector unit 30a for preventing the connector unit 30a from freely moving along the connection means 20a. [145] As shown in Figures 17 and 19, a through hole 31b is formed in the center of the connector unit 30b for allowing the connection means 20a to pass. [146] The connector unit 30b is formed of a plurality of gear knuckle pieces 33b with a rack gear 32b being formed on its upper surface. [147] The lower end of the gear knuckle piece 33b does not contact with the gear knuckle pieces 33b neighboring with a corner cut surface 33b' and is bendable. [148] So, the connector unit 30b is connected by the connection means 20a and is bent for thereby preventing escape. [149] As shown in Figures 28 and 30, the clamp 40 is engaged to the other end of the connection means 20a engaged with the connector units 30a and 30b. [150] The clamp 40 is formed in a rectangular container shape of which both ends are open, and a body 41 having an open hole 41a on its upper surface engaged with the engaging bushing 41b connected with the connection means 20a is formed on a lower surface in a rectangular container shape. [151] A pinion gear 42 engaged with the connector units 30a and 30b is engaged with the fixing shaft 42a fixed in the body 41 while passing through the same. [152] The pinion gear 42 is engaged with the rack gear 32a of the connector unit 30a, and the connector unit 30b is engaged to the gear knuckle piece 33b of the connector unit

30b. [153] The reverse rotation prevention unit 43 is formed in such a manner that it is engaged to the fixing pin 43 a which is inserted through the open hole 41a of the body 41 and is fixed while crossing the body 41, and the engaging protrusion 43a is formed on a lower surface of the handle 43c integrally extended from the reverse rotation prevention protrusion 43b which prevent the pinion gear 42 from rotating in the extrusion direction of the connector units 30a and 30b, and the engaging protrusions

43e and 43f are provided in the upper and lower sides of the engaging protrusion 43d. [154] Here, the reverse rotation prevention unit 43 is formed in an angle shape. When the connector units 30a and 30b engaged with the pinion gear 42 are pulled as they are

inserted into the interior of the body 41, a free rotation of the pinion gear 42 is prevented, so the connector units 30a and 30b do not escape. [155] The reverse rotation prevention units 43 is engaged to the engaging protrusion 43d while closely contacting with the pinion gear 42, and a torsion spring 44 supported by the engaging protrusions 43e and 43f are formed at both ends. [156] The torsion spring 44 performs a support operation for pressing so as to prevent an escape by means of vibrations or centrifugal force as the reverse rotation prevention protrusion 43b of the reverse rotation prevention unit 43 closely contacts with the pinion gear 42. [157] When the connector units 30a and 30b are separated from the body 41, the upper end of the handle 43c of the reverse rotation prevention unit 43 is pressed, and the reverse rotation prevention unit 43 is rotated about the fixing pin 43 a while being supported by means of the elastic force of the torsion spring 44, and the reverse rotation prevention protrusion 43b is disengaged with the pinion gear 42, and the free movement of the reverse rotation prevention unit 43 is prevented by means of an elastic recovery force of the torsion spring 44.

[158] The connector units 30c through 30e are connected with the connection means 20b. [159] As shown in Figures 20 and 21, the connector unit 30c is formed in an integral long plate shape, and a through hole 31c is formed at both ends with the connection means

20b passing through the through hole 31c. [160] In addition, a plurality of engaging holes 32c are longitudinally formed in the center of the connector unit 30c. [161] So, when the connector unit 30c is broken, since it is connected with the connection means 20b, broken pieces are prevented from being spread. [162] As shown in Figures 22 through 24, a through hole 3 Id is formed at both ends of the connector unit 30d for allowing the connection means 20b to pass, and a plurality of knuckle pieces 33d having a plurality of engaging holes 32d are longitudinally formed in the center. [163] A corner cut surface 33d' is formed at a lower end of each knuckle piece 33d and does not contact with the neighboring knuckles piece 33d and is bendable. [164] The connector 30d is connected by means of the connection means 20b and does not escape and is bendable. [165] As shown in Figure3s 25 through 27, two divide pieces 31e are folded in the connector unit 30e while facing with each other. A through hole 32e is formed at both ends for allowing the connection means 20b to pass, and a plurality of knuckle pieces

34e are formed at the center with a plurality of engaging holes 33e being formed in cut stats in longitudinal directions.

[166] A corner cut surface 3 Ie' is formed at a lower end of the divide piece 3 Ie positioned in a lower portion among the divide pieces 3 Ie and does not contact with the neighboring divide pieces 3 Ie and is bendable.

[167] A sub knuckle piece 36e having a through hole 35e at both ends is engaged between the knuckle pieces 34e.

[168] The knuckle piece 34e and the sub knuckle piece 36e are connected by means of the connection means 20b and are not disengaged while being bendable.

[169] The clamp 50 is engaged at the other end of the connection means 20a engaged with the connector units 30c through 30e for engagement with the connector units 30c through 30e.

[170] As shown in Figures 31 and 32 through 37, in the clamp 50, the body unit is formed of a body 5 Id having a vertical piece 51c uprightly bent at both ends of the bottom piece 51b having an engaging ring 51a engaged with the escape prevention bolt shaft 51a' with a nut N fixed at the bolt B passing over the connector units 30c through 30e with its one end being bent.

[171] The body 5 Id is formed in a channel shape with its upper and both ends being open.

[172] A support unit 52 having a torsion spring 52b of which one end is fixed in one vertical piece 51c is engaged with the fixing pin 52a fixed through the vertical piece 51c in the upper space spaced from the engaging ring 51a of the body unit 51.

[173] One end of the torsion spring 52b is engaged to the vertical piece 51c for preventing a free movement while being engaged to the fixing pin 52a.

[174] The engaging unit 53 is formed of an engaging member 53b for engaging the connector units 30c through 30e inserted into the body unit 51 as its upper end formed in the direction of the support unit 52 is pressed by the non-fixed other end of the torsion spring 52b while it is movable in the up and down directions in the fixing pin 53a which passes through the vertical piece 51c in the upper space of the opposite side of the support unit 52.

[175] An escape prevention unit 54 is formed of a bolt shaft 54b, which presses an upper surface of the engaging member 53b of the end supported by means of the torsion spring 52b while passing through the center of the fixing piece 54a fixedly mounted on the vertical piece 51c for surrounding the center upper side of the body unit 51.

[176] The bolt shaft 54b is inserted into the body unit 51, and the engaging member 53b is inserted into the engaging holes 32c, 32d and 33e of the connector units 30c through

30e, and the engaging member 53b is not escaped from the engaging holes 32c, 32d and 33e by means of vibrations or centrifugal force.

[177] The operation of the present invention will be described.

[178] A plurality of the spikes 10a are arranged in one line by using the connection means 20a, and the insertion end 1 Ia is inserted into the double wheels, and the close contact end 12a is closely contacted with the surface of the double wheel while contacting with the ground when the double wheels rotate.

[179] At this time, when an automobile transports a heavy thing or a certain transportation thing, heavy weights are applied to the spikes 10a, and torsion phenomenon and vibrations occur in the spikes by means of the rotational force of the double wheels. Even when the spikes 10a are cut and broken, the broken pieces do not spread since they are connected with the escape prevention wire 18a for thereby preventing accidents.

[180] The spikes 10b are engaged with the sub plate 17b in the upper side of the main plate 14b. The weights and torsion phenomenon and vibrations occur in the spikes 10b like in the spikes 10a, even when the spikes are broken in a state that the main plate 14b and the sub plate 17b are overlapped, one of the main plate 14b and the sub plate 17b is broken, and the non-broken main plate 14b or the sub plate 17b remains attached for thereby preventing the broken pieces from being spread.

[181] The spikes 10c allow the broken pieces not to spread even when the main plate 14c or the sub plate 17c is broken as the escape prevention wire 18c is engaged in the outer rim of the sub plate 17c by bending the outer end of the sub plate 17c after the sub plate 17c is engaged to the upper side of the main plate 14c.

[182] The spikes 1Od prevents the double wheels from being torn out by preventing the phenomenon that sharp edges of the cut surface contact with the inner surface of the double wheels even when the both sides of the insertion ends 1 Id are broken by attaching the protection plate 16d which surrounds the outer surface of the insertion end 1 Id of the main plate 15d.

[183] As the spikes 10a through 1Od are used in the present invention, it is possible to prevent the broken pieces of the spikes 10a through 1Od from damaging other automobiles for thereby preventing a large accident. Since it is possible to prevent the double wheels from being broken, an exchange cost of the wheels can be saved.

[184] In addition, when the connection means 20a is used, the connector unit 30a among the connector units 30a and 30b is engaged to the clamp 40 as the connection means 20a passes in an integral plate shape.

[185] At this time, when the connector unit 30a is broken as a bending stress is applied to the connector unit 30a, since it is connected with the connection means 20a, the broken pieces are not escaped, and the sliding prevention flag is not loosened, so it is possible to prevent the damages of the double wheels and the automobile as the sliding prevention flag is loosened.

[186] In the connector unit 30b, a plurality of knuckle pieces 34e are connected with the connection means 20a as compared to the integral type connector unit 30a. When a bending stress is applied, the knuckle pieces 34e are bent for thereby preventing damages.

[187] The connector unit 30d is integrally connected with the connection means 20b. Even when it is broken as the bending stress like in the integral connector unit 30a occurs, since it is connected with the connection means 20b, it is possible to preventing the loosening of the sliding prevention flag for thereby preventing accidents.

[188] The connector unit 30d is connected by means of the connection means 20b, and the connector unit 30d is cut by the same length for thereby forming a plurality of knuckle pieces 33d, and it has the same bending function as the connector unit 30b, so it is not broken.

[189] The connector unit 30e is connected with the connection means 20b and has the bending function. The knuckle pieces 34e are connected in one line like the knuckle pieces 33d of the connector unit 30d are divided into two parts with respect to the connection means 20b in the divide pieces 3 Ie. The sub knuckle pieces 36e are connected with the connection means 20b between the knuckle pieces 34e for thereby enhancing the strength and safety of the knuckle pieces 34e.

[190] The lower ends of the knuckle pieces 33d are formed of the cornet cut surfaces 33d', so the neighboring knuckle pieces 33d and the ends do not contact, but are bendable.

[191] When the connection means 20a is used, the clamp 40 engaged with the connector units 30a and 30b might be used when the space of the double wheel is narrow, and it is possible to simply engage by using a rack and pinion engagement method.

[192] The reverse rotation prevention flag 43 is possible to easily control the free rotation of the pinion gear 42. Even when a large tensional force is applied to the sliding prevention flag, the connector units 30a and 30b are not escaped from the clamp 40 for thereby obtaining a safe operation.

[193] When the connection means 20b is used, the clamp 50 engaged with the connector units 30c through 30e is able to enhance the safety of the sliding prevention flag by preventing the escape phenomenon as the bolt shaft 54b supports the engaging member

53b so as to prevent the unlocking in the engaging holes 32c, 32d and 33e of the engaging member 53b by means of the centrifugal force occurring as the double wheels rotate and the vibrations occurring when contacting with the ground as it is inserted into the interior of the clamp 50.

[194] The sliding prevention flag according to the present invention is able to prevent the sliding of the automobile using double wheels and to minimize the damages of the spikes 10a through 1Od while preventing the spreading of the broken pieces and decreasing the accident possibility with another automobile. Since the connector units 30a through 30e are connected with the connection means 20a and 20b, even when accident occurs, it is possible to prevent the sliding prevention flag from being disengaged for thereby avoiding combined accidents.

[195] The preferred embodiments of the present invention is provided for illustrative purposes, and the present invention is not limited to the above disclosed descriptions, and those who skilled in the art can modify and correct the disclosed descriptions without departing from the spirits of the present invention and the scopes of the claims.

[196]

Industrial Applicability

[197] As described above, the present invention is basically able to increase the applicability as the present invention can be variously adapted depending on the state of the road surface contacting with the double wheels by using spikes formed in various structures.

[198] In addition, even when the breaking phenomenon occurs the broken pieces do not spread by providing the escape prevention wire and two-layer spike structures for thereby preventing combined accidents while protecting double wheels, and it is possible to prevent accidents which occur in relation with the damages of the vehicle.

[199] As an integral structure connected to the connection means is provided and the connector unit is formed of multiple knuckle pieces, it can be adapted depending on the sizes of the double wheels and the bending stress. In case of the integral structure, even when damages occur, since it is connected with a connection means, the sliding prevention flag is not loosened, and in case that the knuckle piece is used, it flexibly operates with respect to the bending stress since it bends, which leads to enhancing the safety.

[200] The applicability of the product can be widened by using the clamp which can be used depending on the characteristic based on the connection means and the connector unit.