| JP2005163441 | BAMBOO FOUNDATION MATERIAL, BAMBOO GRATING CRIB DEVICE, AND BAMBOO FENCE CONDUIT DEVICE |
| JP2004211406 | JOINT STRUCTURE OF FENCE |
| WO/1993/023626 | IMPACT-ABSORBING CRASH BARRIER |
Background Art [2] As shown in Figures 1 through 3, in a conventional guardrail for roads, a column 1 formed of a circular pipe is installed vertically on the ground. A buffering bracket 2 fabricated by bending a steel plate is fixed to one side or both upper sides of the column 1 by a fixing bolt 3. A steel plate is bent in a waveform at a front end of the buffering bracket 2 installed in the column for thereby fabricating the guardrail plate 4.
The thusly fabricated guardrail 4 is fixedly installed.
[3] In Figures 1 through 3, the reference numerals 5 represents a cover for covering the upper side of the column 1,7 represents a reflection sheet installation port installed on a concave plate part of the guardrail plate 4. A high luminance reflection sheet 6 is attached on an outer surface of the reflection sheet installation port 7 for thereby reflecting the light of the vehicle.
[4] A first impact force is applied to the guardrail plate 4 that is bent in a waveform shape when a vehicle collides with the conventional guardrail for roads. The impact force is transferred to the column 1 through the buffering bracket 2. The above impact force is absorbed in such a manner that the buffering bracket 2 is bent wherein it is fabricated by bending the steel plate and is installed between the guardrail plate 4 and the column 1.
[5] Namely, in the guardrail plate 4 of the guardrail for roads, the end of the steel plate is exposed to the outside. In this state, when a vehicle collides with the same, in a state that a weak portion of the weak collides with the end of the steel plate of the guardrail plate 4 in a vertical direction, the damage of the vehicle is increased.
[6] In particular, in a car accident, a person may be popped out from the vehicle. At this time, the person may hit the end portion of the steel plate of the guardrail plate 4, so that people may be critically damaged.
[7] In addition, since the buffering bracket 2 is fabricated by bending the steel plate, when the vehicle is collided with the guardrail for the roads. The buffering bracket 2 fabricated by bending the steel plate is crushed, so that a replacing work is needed.
Therefore, an installation cost is increased.
[8] Furthermore, since the column 1 adapted to vertically install the guardrail for roads is formed of a circular pipe, in the case that the vehicle collides, the portions between a portion exposed to the upper surface of the ground and a portion planted into the ground may be easily bent. Namely, the strength of the column formed of the pipe has weak strength.
Disclosure of Invention Technical Solution [9] Accordingly, it is an object of the present invention to provide a guardrail for roads capable of minimizing damage during an accident in such a manner that a guardrail fabricated by bending a steel plate in a waveform is bent, and a sharp edge is not exposed to the outside. In addition, a buffering bracket installed between a buffering bracket and a guardrail is made of a material having a high cushion such as rubber for thereby enhancing a buffering effect during a collision of a vehicle, and it is possible to prevent a buffering bracket from being damaged. The strength of a column is enhanced by forming an insertion groove in a longitudinal direction in the column.
[10] To achieve the above objects, in a road guardrail in which a guardrail fabricated by bending a steel plate in a waveform is engaged to a column vertically installed on the ground using a fixing bolt in a state that a buffering bracket is disposed, there is provided a road guardrail, comprising an insertion groove formed in the entire portions of one side or both sides of the column in a longitudinal direction of the column wherein the buffering bracket is formed of a material having a cushion such as rubber material; a protrusion formed in the rear side of the same in the upper and lower directions wherein it is well fit in the insertion groove of the column; and a bent part in which an inclined upper portion or both upper and lower portions are bent in the direction of an intermediate plane portion wherein the guardrail is bent in a waveform.
Description of Drawings [11] The preferred embodiments of the present invention will be described with reference to the accompanying drawings.
[12] Figure 1 is a lateral cross sectional view illustrating a conventional guardrail for roads; [13] Figure 2 is a plane cross sectional view illustrating a conventional guardrail for roads; [14] Figure 3 is a back separate perspective view illustrating an installation state of a conventional guardrail for roads; [15] Figure 4 is a back separate perspective view illustrating a guardrail for roads according to a first embodiment of the present invention; [16] Figure 5 is a back separate perspective view illustrating a guardrail for roads according to a second embodiment of the present invention; [17] Figure 6 is a lateral cross sectional view illustrating an engaging state of Figure 5 according to the present invention; [18] Figure 7 is a plane cross sectional view illustrating an engaging state of Figure 5 according to the present invention; [19] Figure 8 is a plane cross sectional view illustrating a road guardrail having a column according to another embodiment of the present invention; and [20] Figures 9A through 9C are a view illustrating a guardrail, a buffering bracket, and a column that are major elements of a road guardrail according to another embodiment of the present invention.
Best Mode [21] The road guardrail according to the present invention will be described with reference to Figures 4 through 9.
[22] Figure 4 is a back separate perspective view illustrating a guardrail for roads according to a first embodiment of the present invention, Figure 5 is a back separate perspective view illustrating a guardrail for roads according to a second embodiment of the present invention, Figure 6 is a lateral cross sectional view illustrating an engaging state of Figure 5 according to the present invention, Figure 7 is a plane cross sectional view illustrating an engaging state of Figure 5 according to the present invention, Figure 8 is a plane cross sectional view illustrating a road guardrail having a column according to another embodiment of the present invention, and Figures 9A through 9C are a view illustrating a guardrail, a buffering bracket, and a column that are major elements of a road guardrail according to another embodiment of the present invention.
[23] First, as shown in Figure 4, in a road guardrail according to an embodiment of the present invention, a guardrail plate 4 fabricated by bending steel plates is engaged in such a manner that a fixing bolt 3 passes through a guardrail plate 4, a buffering bracket 2 and a column 1 in a state that a buffering bracket 2 is disposed in a vertically installed column 1.
[24] An insertion groove 9 is formed in the entire portion of the column 1 in a lon- gitudinal direction. At this time, in the insertion groove 9, an end surface (lower surface) of the center portion concave in the inward direction is formed in a flat shape, and both ends of the same are formed in a circular shape in a radiation shape from the center to the outside. An end of the circular portion is integrally connected with an outer circular portion of the column 1.
[25] In addition, the buffering bracket 2 is formed of a material having a cushion such as rubber material or foamed urethane, and a protrusion 10 formed in the read side is matched with the insertion groove 9 of the column 1 in the upper and lower lon- gitudinal direction.
[26] In addition, in the guardrail plate 4, a bent portion 15 is formed by bending the upper portion or both upper and lower portions of the same bent in a waveform and inclined, in the direction of the intermediate plane portion 13.
[27] The guardrail 4, the buffering bracket 2 and the column 1 are engaged by a fixing bolt 3. A hole is formed in the guardrail 4, the buffering bracket 2 and the column 1 for passing through the fixing bolt 3. The guardrail 4, the buffering bracket 2 and the column are engaged by passing the fixing bolt 3 through the holes.
[28] As shown in Figures 5 through 7, in another embodiment of the present invention, a thread 11 and a plane portion 16 tightly engaged with the thread part 14 and the plane part 13 of the guardrail plate 4 are additionally formed based on the shape of the rear surface of the guardrail plate 4 in the front side of the buffering bracket 2. As shown therein, the guardrail plate 4 and the column 1 are same, so that the description of the same is omitted.
[29] As described above, the buffering bracket 2 is formed of a material having a certain cushion like rubber material or foamed urethane. A protrusion 10 tightly inserted into the insertion groove 9 of the column 1 is formed in the rear side in the upper and lower directions. A thread portion 11 inserted into the threaded part 14 of the guardrail plate 4 is forwardly protruded in the front side in the horizontal direction.
A plane thread 16 contacting with the plane surface portion 13 of the rear side of the guardrail plate 4 is formed at the center of the threads 11. A bent part insertion groove 12 into which a bent part 15 bent in the guardrail plate 4 is inserted is formed in the upper or both upper and lower sides of the buffering bracket 2 in the horizontal direction.
[30] As shown in Figures 9A, 9B and 9C, there are shown the guardrail plate 4, the buffering bracket 2 and the column 1 that are the major elements of the present invention. Figure 9A illustrates the guardrail plate 4 in which a bent portion 15 bent from the inclined end portion of the guardrail plate 4 is formed only on the upper end portion. Figure 9B illustrates the buffering bracket 2 in which the bent portion insertion groove 12 into which the bent portion 15 of the guardrail plate 4 is inserted is formed only on the upper portion. Figure 9C illustrates the column 1 in which the insertion groove 9 is formed in the longitudinal direction at both sides of the column 1.
[31] As shown in Figure 8, in another embodiment of the present invention, the guardrail plate 4 is installed at both outer sides of the buffering bracket 2 in a state that each buffering bracket 2 is disposed at both sides of the column 1 having the insertion groove 9 in both directions.
[32] The assembling and operation of the present invention will be described with reference to Figures 4 through 9.
[33] As shown in Figure 4, when the guardrail 8 for roads is installed in the road, the column 1 is vertically installed on the ground. The fixing bolt 3 is inserted into a bolt insertion hole passing through the plane surface portion 13 of the guardrail 4 and passes through the buffering bracket 2. The end of the fixing bolt 4 passing through the hole of the buffering bracket 2 is passed up to the bolt insertion hole of the column 1, and a nut is engaged with the thread of the front end of the fixing bolt 3 extended to the opposite hole of the column 1, so that the guardrail 8 for rail is installed.
[34] When a vehicle collides with the guardrail 8 for roads, since the buffering bracket 2 having a cushion such as rubber material or foamed urethane is disposed between the column 1 stably installed on the ground and the guardrail plates 4 to which the vehicle directly hits, the buffering bracket 2 absorbs the impact force for thereby minimizing the damages due to the collision. Therefore, the buffering bracket 2 formed of rubber material or foamed urethane according to the present invention is not damaged as compared to the conventional art in which the buffering bracket 2 fabricated by bending the steel plate.
[35] In addition, in the case that a person in the vehicle is popped to the outside of the vehicle when the accident occurs and hits the guardrail 4, even when the person hits the end portion of the guardrail plate 4, since the end portion of the guardrail 4 is bent inwardly, and a sharp edge is removed, it is possible to minimize the damage of the accident as compared to the conventional guardrail.
[36] In addition, in the case that the vehicle collides with the road guardrail 8, the impact weight of the vehicle is transferred to the column 1. In the present invention, the column 1 according to the present invention has an insertion groove 9 in the lon- gitudinal direction, the strength of the column 1 is increased, and the damage of the column 1 is minimized.
[37] As shown in Figures 5 through 7, in another embodiment of the present invention, the thread 11 and the flat thread part 16 are formed based on the shape of the rear surface of the guardrail plate 4 in the front side of the buffering bracket 2, and the front end of the buffering bracket 2 is inserted into the rear surface of the guardrail 4 as compared to the earlier embodiment of the present invention as shown in Figure 4. The remaining construction is the same as the earlier embodiment of the present invention.
[38] In the case that the road guardrail 8 according to further embodiment of the present invention is installed as shown in Figures 5 through 7, the front end of the buffering bracket 2 is inserted into the rear side of the guardrail plate 4 as shown in Figure 6. In the case that the front side of the buffering bracket 2 is inserted into the rear surface of the guardrail plate 4, the front bending part insertion groove 12 of the buffering bracket 2 flexible because it is formed of rubber material or foamed urethane is forcibly widened. The bent part 15 of the guardrail bracket 4 is inserted into the widened bent part insertion groove 12. In the above state, the front surface of the buffering bracket 2 having the thread 11 and the plane surface thread port 16 based on the threaded part 14 and the plane surface 13 of the rear surface of the guardrail plate 4 is inserted into the rear surface of the guardrail plate 4, and then the widened bent part insertion groove 12 is released. Therefore, the bent part insertion groove 12 is contracted by an elastic force of the buffering bracket 2. As shown in Figure 6, the buffering bracket 2 is inserted into the rear side of the guardrail plate 4.
[39] At this time, the bolt insertion hole formed in the plane surface portion 13 of the guardrail plate 4 should be matched with the bolt insertion hole formed in the buffering bracket 2.
[40] In a state that the buffering bracket 2 is inserted into the rear surface of the guardrail plate 4, the guardrail plate 4 with the inserted buffering bracket 2 is installed in the column 1. At this time, the protrusion 10 vertically formed in the rear side of the buffering bracket 2 is inserted into the insertion groove 9 of the column 1, and the fixing bolt 3 is inserted into the guardrail plate 4, the buffering bracket 2, and the bolt installation hole of the insertion groove 9, and the nut is engaged with the thread of the fixing bolt 3 protruded to the outside of the opposite side, so that the installation of the road guardrail 8 is completed.
[41] In the case that the vehicle collides with the road guardrail 8 according to another embodiment of the present invention, the buffering bracket 2 formed of rubber material or foamed urethane absorbs the impact, and the damage of the road guardrail 8 is minimized. The end of the guardrail 4 is bent and removed, and the strength of the column 1 is enhanced by the insertion groove 9 formed in the column 1 in the same manner as the earlier embodiment of the present invention.
[42] Fbwever, in this embodiment of the present invention, the front side of the buffering bracket 2 is formed based on the rear surface of the guardrail plate 4 formed in the waveform, and the front side of the buffering bracket 2 and the rear surface of the guardrail plate 4 are inserted and assembled. Therefore, when the vehicle collides, the impact absorption force is more enhanced, so that the damage ratio of the road guardrail 8 is decreased.
[43] In addition, Figures 9A, 9B and 9C illustrate the other embodiment of the guardrail plate 4, the buffering bracket 2 and the column that are the major element of the present invention. Figure 9A is a view of the construction that in the guardrail plate 4, the bent portion 15 bent and formed in the inclined end portion of the guardrail plate 4 is formed only on the upper portion, and Figure 9B is a view of the construction that in the buffering bracket 2, the bent part insertion groove 12 into which the bent portion 15 of the guardrail part 15 is inserted is formed only on the upper side. Since the probability that the person popped from the vehicle during the accident is moved under the guardrail plate 4 is less than the probability that the person collides with the upper side of the guardrail plate 4. Therefore, the bent portion 15 is formed in the upper side of the guardrail plate 4. As the bent portion 15 is formed in the upper portion of the guardrail plate 4, the bent part insertion groove 12 into which the bent portion 15 is inserted is formed only on the upper side in the buffering bracket 2.
[44] In addition, Figure 9C is a view illustrating the construction that the insertion groove 9 is formed in the longitudinal direction at both sides of the column 1. As shown in Figure 8, the guardrail plate 4 is installed in both outer sides of the buffering bracket 2 in a state that the buffering bracket 2 is disposed at both sides of the column 1.
Industrial Applicability [45] In the road guardrail according to the present invention, the end portion of the guardrail fabricated by bending the steel plate in a waveform is bent in such a manner that the sharp end of the steel plate is not exposed for thereby minimizing the damage during the accident. The buffering bracket installed between the buffering bracket and the guardrail plate is formed of a cushion material such as rubber material, so that the buffering effect is excellent during the accident of the vehicle. The buffering bracket formed of rubber material is prevented from damage. The strength of the column is increased by the insertion groove formed in the longitudinal direction of the column, and the damage of the guardrail is damaged. In addition, the maintenance is not needed, and there is an economical efficient effect.
[46] As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described examples are not limited by any of the details of the foregoing de- scription, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modi- fications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.