STRUCTURE IMPROVED WIRE SAW

Technical Field

The present invention relates to a diamond wire saw, on which diamond is stuck, for cutting an object being cut by- winding an wire on the object being cut and rotating the wire at high speed through a driving device to remove constructions, and more particularly, to a structure- improved wire saw, which includes a wire of a predetermined length made of a metallic material, beads made by sintering diamond therein and fixed on the outer peripheral surface of the wire, and a bead supporting portion for fixing the beads to the wire, thereby restricting abrasion by preventing movement between the beads and the wire to thereby increase its lifespan.

Background Art

Presently, there are a diamond wire saw method and a wheel saw method for removing constructions or various structures. Out of them, the diamond wire saw method has been mainly used. The wire saw method is used for maintenance or removal of constructions located in a densely built-up area, maintenance of industrial construction, which might suffer a great loss if its facilities are all discontinued, and extension work of construction, which is carried out in a limited space or demands a clean cut section. In addition, the wire saw method is used for maintenance or removal of a road or an express highway, which may cause inconvenience to citizens, such as a hindrance to surrounding environments or a traffic hindrance. Moreover, the wire saw method is used for

removal or maintenance of constructions, such as schools, hospitals, and telephone offices, which is restricted in work due to noise, vibration and dust. That is, the wire saw method covers a wide scope, for example, work fields demanding to minimize the damages of surrounding environments or work fields carried out in the restricted working environment.

An example of a method of manufacturing such a wire saw according to a prior art will be described now. FIG. 1 is a sectional view of an example of the wire saw according to the prior art. As shown in FIG. 1, metallic shanks 110 are longitudinally mounted on the outer peripheral surface of a metallic wire 100 at regular intervals. The shank 110 has a number of screw threads 111 formed on the inner peripheral surface thereof, so that the shank 110 is fixed to the wire 100. The shank 110 and the wire 100 are fixed to each other by filling gaps between the screw threads 111 and the wire 100 with resin.

Furthermore, a bead 130, which is made by sintering diamond and metallic powder, is coupled to the outer peripheral surface of the shank 110. Additionally, a bead supporting portion 120 injection-molded of urethane resin or rubber resin for surrounding the shank 110 is formed between the beads 130.

While the conventionally required size for the outer diameter of the wire saw is generally lcm to 1.1cm, the outer diameter of the typical wire is generally 5mm and the outer diameter of the typical shank is generally 8mm. So, since a thickness of the bead is manufactured relatively too thin, the wire saw has a short lifespan in comparison with the complicity in manufacturing and the price.

In addition, FIG. 2 is a sectional view showing an example of a wire saw, which has no shank, according to another prior art. As shown in FIG. 2, to solve the problems of the prior art, a method of manufacturing an improved wire saw is provided. Referring to FIG. 2, beads 210 are directed fixed to a wire 200 without any shank, and a resin 220 is covered and injection-molded on the outer peripheral surface of the wire 220. The improved wire saw according to the prior art has an advantage in that the beads 210 can be manufactured thick. However it has a problem in that a screw portion for firmly fixing the wire 200 and the beads 210 with each other cannot be formed due to the high strength of the beads 210, and the wire 200 would be cut as the beads 210 are rotated on the wire 200 durincj the use. Therefore, in order to firmly fix the beads to the wire even though the shanks are removed to make the beads of the wire saw thick, a structure- improved wire saw, which is increased in its lifespan, is demanded.

Disclosure of Invention

Technical Problem

Accordingly, the present invention has been made in an effort to solve the above-mentioned problems occurring in the prior arts, and it is an object of the present invention to provide a structure- improved wire saw, which has no shank coupled and fixed between beads and a wire, which can prevent abrasion of the wire by increasing a fixing force between the bead and the wire, which can freely select a thickness of the beads, and which can buffer a cutting shock by means of

elastic springs and synthetic resins, thereby increasing the lifespan of the beεid.

Technical Solution

To achieve the above objects, in an aspect of the present invention, the present invention provides a structure- improved wire saw comprising: a wire formed in such a way that a number of steel wires are twisted; beads arranged on the outer peripheral surface of the wire at regular intervals and containing diamond and metallic powder; an elastic spring disposed on the outer peripheral surface of the wire and coupled with the bead; and a bead supporting portion formed between the beads in such a way as to cover the wire with synthetic resin.

In addition, the bead has a groove of a predetermined size formed in the inner diameter thereof, and an end of the elastic spring is inserted into the groove.

Moreover, the end of the elastic spring is coupled to the bead via welding.

Furthermore, the bead further has a spiral -type coupling portion formed in the inner diameter thereof, and elastic spring can be coupled to the coupling portion.

Additionally, the elastic spring is coupled to the outer surface of the inner diameter rim of the bead via welding.

In addition, the bead has grooves formed at both sides of the inner diameter thereof, and the elastic springs are respectively inserted into the grooves.

Moreover, the bead has an inner diameter portion having a uniform inner diameter as large as the elastic spring can pass

through the inner diameter portion thereof. In addition, a number of the elastic springs are provided.

In another aspect of the present invention, the present invention provides a structure- improved wire saw comprising: a wire formed in such a way that a number of steel wires are twisted; beads arranged on the outer peripheral surface of the wire at regular intervals and containing diamond and metallic powder; an elastic spring disposed on the outer peripheral surface of the wire and having a length shorter than an interval between two adjacent beads, the elastic spring being coupled with the bead via welding; and a bead supporting portion formed between the beads in such a way as to cover the wire with synthetic resin.

In a further aspect of the present invention, the present invention provides a structure-improved wire saw comprising: a wire formed in such a way that a number of steel wires are twisted; beads arranged on the outer peripheral surface of the wire at regular intervals and containing diamond and metallic powder; a pair of elastic springs disposed on the outer peripheral surface of the wire and having a length shorter than an interval between two adjacent beads, ends of the elastic springs being respectively coupled with both sides of the bead via welding; and a bead supporting portion formed between the beads in such a way as to cover the wire with synthetic resin.

Advantageous Effects

The structure-improved wire saw according to the present invention can firmly fix the bead to the wire without shanks

coupled and fixed between the beads and the wire. In addition, the structure- improved wire saw can prevent abrasion of the wire by increasing the fixing force between the beads and the wire, and freely select the thickness of the beads since it can be manufactured without the shanks. Moreover, the structure-improved wire saw can effectively buffer the cutting shock applied to the beads by means of the elastic springs and synthetic resins. So, the structure-improved wire saw is increased in its lifespan. The above and other objects, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention in conjunction with the accompanying drawings.

Description of the Drawings

FIG. 1 is a sectional view showing an example of a wire saw according to a prior art .

FIG. 2 is a sectional view showing an example of a wire saw, which has no shank, according to another prior art.

FIG. 3 is a side sectional view of a structure-improved wire saw according to a first preferred embodiment of the present invention.

FIG. 4 is a side sectional view of a structure-improved wire saw according to a second preferred embodiment of the present invention.

FIG. 5 is a side sectional view of a structure-improved wire saw according to a third preferred embodiment of the present invention.

FIG. 6 is a side sectional view of a structure-improved wire saw according to a fourth preferred embodiment of the present invention.

FIG. 7 is a side sectional view of a structure-improved wire saw according to a fifth preferred embodiment of the present invention.

[Explanation on reference numerals of main elements in drawings]

10: wire 20: bead 21: coupling portion 22: groove

22A, 22B: groove 23: inner diameter portion

30, 3OA, 3OB, 3OC, 3OD: elastic spring

40: bead supporting portion

Mode for Invention

Reference will be now made in detail to the preferred embodiment of the present invention with reference to the attached drawings . FIG. 3 illustrates a structure-improved wire saw according to a first preferred embodiment of the present invention. FIG. 3 is a side sectional view showing a spiral -type coupling portion 21 disposed in the inner diameter of a bead 20 and an elastic spring 3OA coupled to the coupling portion 21. In addition, FIG. 4 illustrates a structure-improved wire saw according to a second preferred embodiment of the present invention. FIG. 4 is a side sectional view showing a state where an elastic spring 3OA' is coupled the bead 20 by coupling the elastic spring 3OA' to the outer surface of the inner diameter rim of the bead 20 via welding.

Moreover, FIG. 5 illustrates a structure- improved wire saw according to a third preferred embodiment of the present invention. FIG. 5 is a side sectional view showing a groove

22 of a predetermined width formed on a side of a bead 20 and an elastic spring 3OB inserted and welded to the groove 22.

In the meantime, FIG. 6 illustrates a structure- improved wire saw according to a fourth preferred embodiment of the present invention. FIG. 6 is a side sectional view showing grooves 22A and 22B of a predetermined width formed on both sides of a bead 20 and elastic springs 3OC respectively inserted and welded to the grooves 22A and 22B.

Furthermore, FIG. 7 illustrates a structure-improved wire saw according to a fifth preferred embodiment of the present invention. FIG. 7 is a side sectional view showing an inner diameter portion 23 formed in the inner diameter of a bead 20 and an elastic spring 3OD passing through the inner diameter portion 23 and extending to a predetermined length.

The structure- improved wire saw according to the present invention is a wire saw, in which beads containing diamond of a predetermined amount are coupled to the wire of a predetermined length at regular intervals, and which is used for cutting work to remove constructions and structures. The structure-improved wire saw according to the present invention includes: a wire 10 of a predetermined length formed by twisting a number of steel wires or zinc-galvanized steel wires; and a number of beads 20 of a predetermined thickness outwardly fit to the outer peripheral surface of the wire 10 at regular intervals and containing diamond and metallic powder .

Furthermore, the structure-improved wire saw further includes an elastic spring 30 of a predetermined length outwardly fit to the wire 10 and coupled with the bead 20, and a bead supporting portion 40 formed between the beads 20 in such a way as to cover the wire 10 with synthetic resin, such as urethane and rubber.

As a first preferred embodiment showing the coupling between the bead 20 and the elastic spring 30, the spiral -type coupling portion 21, to which the elastic spring 3OA is coupled, is formed in the inner periphery of the bead 20 outwardly fit to the wire 10, and the elastic spring 3OA protrudes to a predetermined length from both sides of the bead 20.

In the meantime, as a second preferred embodiment showing the coupling between the bead 20 and the elastic spring 30, the elastic spring 3OA is coupled to the bead 20 by coupling the elastic spring 3OA to the outer surface of the inner diameter rim of the bead 20 via welding.

In the meantime, as a third preferred embodiment showing the coupling between the bead 20 and the elastic spring 30, the groove 22 of the predetermined width is formed on a side of the inner periphery of the bead 20 and an end of the elastic spring 3OB is inserted to the groove 22 and coupled to the bead 20 via welding. In the meantime, as a fourth preferred embodiment showing the coupling between the bead 20 and the elastic spring 30, the grooves 22A and 22B of the predetermined width are formed on both sides of the bead 20 and the elastic springs 3OC are respectively inserted to the grooves 22A and 22B and coupled

to the bead via welding in such a way as to protrude to the predetermined length from the both sides of the bead.

In the meantime, as a fifth preferred embodiment showing the coupling between the bead 20 and the elastic spring 30, the inner diameter portion 23, through which the elastic spring 3OD passes, is formed in the inner diameter of the bead 20, the elastic spring 3OD protrudes to the predetermined length from the both sides of the bead 20, and the wire 10 is inserted into the inner diameter of the elastic spring 3OD. As described above, the beads 20 are arranged and fixed on the wire 10 of the predetermined length at regular intervals. Moreover, the elastic spring 30 of the predetermined length is fixed on the side of the bead 20, and then, closely inserted to the outer peripheral surface of the wire 10. It is preferable that the end of the elastic spring 30 abuts on the side of the bead 20 and fixed thereto via welding, but the bead 20 and the elastic spring 30 may be manufactured in various forms by those skilled in the art to fix the bead 20 and the elastic spring 30 with each other more easily. Hereinafter, the fixing between the bead 20 and the elastic spring 30 will be described in more detail through the preferred embodiments.

[First Embodiment] FIG. 3 is a side sectional view of the structure-improved wire saw according to the first preferred embodiment of the present invention.

As shown in FIG. 3, the spiral -type coupling portion 21, to which the elastic spring 3OA can be coupled, is formed in the inner diameter of the bead 20. The elastic spring 30 is

coupled and fixed to the coupling portion 21 in such a way as to protrude to the predetermined length from both sides of the bead 20. When a number of the beads 20 are fit to the wire 10 at regular intervals, the elastic springs 3OA fixed to the respective beads 20 can be located adjacent to each other.

[Second Embodiment]

As shown in FIG. 4, the elastic spring 3OA' coupled with the bead 20 by coupling the elastic spring 3OA' to the outer surface of the inner diameter rim of the bead 20 via welding. In this instance, welding may be achieved using active silver solder. Each elastic spring 3OA' is fixed to a side of each bead 20, and then a number of the beads 20 coupled with the elastic spring 3OA' are fit on the wire 10 in one direction. The elastic spring 3OA' may be adjacent to or closely abut on the next bead 20.

[Third Embodiment]

FIG. 5 is a side sectional view of a structure-improved wire saw according to a third preferred embodiment of the present invention. As shown in FIG. 5, the groove 22 of the predetermined width is formed on a side of the inner diameter of the bead 20. The elastic spring 3OB of the predetermined length, which is inserted into the groove 22, is fixed to the bead via welding. Each elastic spring 3OB is fixed to the side of each bead 20, and then a number of the beads 20 coupled with the elastic spring 3OB are fit on the wire 10 in one direction. The elastic spring 3OB may be adjacent to or closely abut on the next bead 20.

[Fourth Embodiment]

FIG. 6 is a side sectional view of a structure-improved wire saw according to a fourth preferred embodiment of the present invention. As shown in FIG. 6, the grooves 22A and 22B of the predetermined width are formed on both sides of the inner diameter of the bead 20. The elastic springs 3OC of the predetermined length, which are inserted into the grooves 22A and 22B, are fixed to the bead via welding. Both side ends of the elastic springs 3OC between the beads 20 may be spaced apart from each other at a predetermined interval.

[Fifth Embodiment]

FIG. 7 is a side sectional view of a structure-improved wire saw according to a fifth preferred embodiment of the present invention. As shown in FIG. 7, the inner diameter portion 23 of the bead 20 is formed correspondingly to the inner diameter of the elastic spring 3OD. The bead 20 is outwardly fit onto the outer peripheral surface of the elastic spring 3OD of the predetermined length fit to the wire 10. The elastic spring 3OD protrudes to the predetermined length from the bead 20, so that the elastic spring 3OD can serve as a general shank.

Meanwhile, the; present invention further includes a means for preventing that the beads 20 are moved or rotated along the outer peripheral surface of the wire 10 through the elastic spring 30 fixed to the beads 20 in the first to fifth preferred embodiments. For the means, urethane resin or rubber resin is covered and injection-molded between the beads 20. So, the bead supporting portion 40 for surrounding the wire 10 and the elastic spring 30 is formed in such a way that just

the plural beads 20 are exposed to the outside with a predetermined thickness .

So, the elastic spring can be fixed without movement since the resin of the bead supporting portion 40 fills gaps of the elastic spring 30. Furthermore, the beads 20 are not rotated since the elastic spring 30 is fixed.

The beads 20 are fixed to the wire 10 through the resins of the elastic spring 30 and the bead supporting portion 40.

The beads 20 can buffer a laterally generated shock through an elastic action during cutting work, and so, it prevents a damage of the beads 20 and increase the lifespan of the beads

20.

In the meantime, the fixing between the bead 20 and the elastic spring 30 described and illustrated in the preferred embodiments of the present invention is examples to firmly fix the elastic spring 30 to the bead 20, and so, it would be appreciated that those skilled in the art can change and modify the means for firmly fixing the elastic spring 30 to the bead 20 in various forms.

Industrial Applicability

As described above, the structure-improved wire saw according to the present invention can firmly fix the bead to the wire without shanks coupled and fixed between the bead and the wire. In addition, the structure- improved wire saw can prevent abrasion of the wire by increasing the coupling force between the bead and the wire, and freely select the thickness of the bead since it can be manufactured without the shanks. Moreover, the structure-improved wire saw can effectively

buffer the cutting shock applied to the beads through the elastic springs and synthetic resins. So, the structure- improved wire saw is increased in its lifespan.

While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention.