JP6991851B2 - Beam material for vehicle guard rails - Google Patents

Description

The present invention relates to a beam material for a vehicle guard rail, and particularly to a structure of the beam material.

Guardrails are installed as protective fences for vehicles installed on general roads and highways. These vehicle guard fences prevent vehicles in the wrong direction from deviating from the road and protect pedestrians and the like passing on the sidewalk on the shoulder side of the road. As disclosed in Patent Document 1, as a guard fence for a vehicle, a fence made by fixing a beam material obtained by forming a metal plate material into a wavy shape is used on columns erected at predetermined intervals.

Japanese Unexamined Patent Publication No. 2007-21148

The vehicle guard fence disclosed in Patent Document 1 uses a beam material obtained by forming a metal plate material into a wavy shape. Therefore, when the sidewalk on the shoulder of the road is viewed from the road side, the object on the other side of the beam material of the vehicle guard fence cannot be visually recognized. For example, there is a problem that a short child, a child riding on a tricycle, or the like is hidden by a beam material of a vehicle guard fence and is difficult to be visually recognized by a driver of a vehicle traveling on a road.

When installing the guard fence for vehicles, the beam material is fixed to the erected column, and at that time, the worker fixes the beam material to the column while supporting the beam material at a predetermined height. In recent years, workers are aging, and it is desired that guard rails for vehicles have a low workload. The vehicle guard fence disclosed in Patent Document 1 has a problem that the weight of the beam material is heavy and the installer is burdened.

The present invention solves the above-mentioned problems, improves the visibility of what exists on the other side of the vehicle guard rail, reduces the weight, and makes it easy to install the vehicle guard rail beam. The purpose is to provide materials.

The beam material of the vehicle guard fence according to the present invention is a beam material of a vehicle guard fence formed of a plate material and attached to columns erected at predetermined intervals, and the plate material is a plurality of plate materials. A plurality of mounting portions arranged in the longitudinal direction fixed to each of the columns and a hole penetrating a surface located between the adjacent mounting portions are provided , and the hole is formed in the longitudinal direction of the plate material. A plurality of the mounting portions are formed, and the mounting portion has a fixing bolt hole through which a fixing bolt for fixing to the support column is inserted, and the fixing bolt hole has the same shape as the hole .

With the above configuration, the beam material of the vehicle guard fence improves the visibility of the other side of the vehicle guard fence, so that the safety is improved. In addition, the weight of the beam material itself is reduced, and the burden on the operator when installing the guard rail for the vehicle is reduced.

It is a front view of the guard rail for a vehicle which concerns on Embodiment 1 of this invention. It is a side view of the support of the guard rail for a vehicle of FIG. It is a top view of the support of the guard rail for a vehicle of FIG. It is a schematic diagram explaining the positional relationship of the fixing bolt hole, the connecting bolt hole, and the through hole of the beam material of FIG. It is a front view which shows the beam material of the guard rail for a vehicle which concerns on Embodiment 2 of this invention. It is a figure which shows the cross section of the beam material of FIG. It is a schematic diagram explaining the positional relationship of the fixing bolt hole and the connecting bolt hole of the beam material of FIG. It is a front view which shows the beam material of the guard rail for a vehicle which concerns on Embodiment 3 of this invention. It is a figure which shows the cross section of the beam material of FIG. It is a schematic diagram explaining the positional relationship of the fixing bolt hole and the connecting bolt hole of the beam material of FIG.

Embodiment 1.
FIG. 1 is a front view of the vehicle guard rail 100 according to the first embodiment of the present invention. FIG. 1 is a view seen from the road side through which a vehicle passes. The vehicle guard fence 100 is installed on the shoulder of the road. The vehicle guard rail 100 prevents a vehicle traveling on the road from deviating from the road, that is, to an oncoming lane, a sidewalk, or the like when the vehicle travels in the wrong direction. In addition, it suppresses pedestrians and the like from coming out unnecessarily into the road from sidewalks and the like outside the road.

The vehicle guard fence 100 is composed of a support column 20 erected on the ground and a beam material 10 fixed to the support column 20. The columns 20 are erected on the ground at predetermined intervals. A mounting portion 40 of the beam material 10 is fixed to the support column 20. The beam material 10 is made by molding a metal plate material. One beam material 10 is fixed to at least two columns 20. However, it may be fixed to more columns 20, and in the first embodiment, the attachment portion 40a provided at one end of the beam material 10 is attached to the column 20A and the attachment portion 40c is provided at the other end. Is fixed to the support column 20C, and the mounting portion 40b at the center of the beam material 10 is fixed to the support column 20B.

The vehicle guard fence 100 is configured by connecting a plurality of beam materials 10 along the road. The beam material 10A and the beam material 10B that are adjacent to each other are fixed to the support column 20A by overlapping the mounting portions 40 with each other. In FIG. 1, the two beam materials 10A and the beam material 10B are connected, but the vehicle guard fence 100 may be configured by connecting more beam materials 10. The beam materials 10A and 10B may be collectively referred to as the beam material 10. Further, the columns 20A, 20B, and 20C may be collectively referred to as the attachment portion 40, and the attachment portions 40a, 40b, and 40c provided on the support column 20 and the beam material 10 may be collectively referred to as the attachment portion 40.

(Bolt hole 11 for fixing the beam material 10)
FIG. 2 is a side view of the support column 20 of the vehicle guard rail 100 of FIG. FIG. 3 is a top view of the support column 20 of the vehicle guard rail 100 of FIG. 1. FIG. 2 shows a cross section taken along the line AA of FIG. FIG. 3 shows, in particular, a view from the direction of arrow B in FIG.
The beam material 10 is fixed to the support column 20 via the bracket 30. The mounting portion 40 of the beam material 10 is provided with a fixing bolt hole 11 through which the fixing bolt 31 can be inserted. The bracket 30 has a support column fixing portion 33 fixed to the support column 20 in the central portion, and has fixing bolt insertion holes 35 into which the fixing bolts 31 can be inserted at both end portions 34 sandwiching the support column fixing portion 33. The beam material 10 is fixed to the bracket 30 by inserting the fixing bolt 31 into the fixing bolt hole 11 and fastening the fixing bolt 31 and the fixing nut 32. In the bracket 30, the column fixing portion 33 is fixed to the column 20 by fastening the bracket fixing bolt 21 and the bracket fixing bolt 22. Since the column fixing portion 33 has a shape that follows the shape of the column 20, it is stably fixed to the column 20 by the bracket fixing bolt 21 and the bracket fixing bolt 22.

The mounting portions 40 of the two beam materials 10 are overlapped and fixed to one bracket 30. That is, the two beam materials 10 are combined so that the fixing bolt holes 11 overlap each other at the same position. Then, one fixing bolt 31 is inserted into the fixing bolt hole 11, and by tightening the fixing nut 32 screwed into the fixing bolt 31, the two beam materials 10 are attached to the bracket 30 on one support column 20. It is fixed via.

In FIG. 1, the fixing bolt holes 11a and 11c of the beam material 10B are spaced apart from each other so as to correspond to the fixing bolt insertion holes 35 provided at both ends 34 of the bracket 30. Further, the fixing bolt holes 11a and 11c are provided adjacent to the fixing bolt holes 11b. The distance between the fixing bolt hole 11a and the fixing bolt hole 11b is equal to the distance between the fixing bolt hole 11b and the fixing bolt hole 11c. The beam material 10B is provided with a plurality of fixing bolt holes 11 between one mounting portion 40a and the mounting portions 40b adjacent to the mounting portion 40a in the longitudinal direction of the beam material 10B. A plurality of fixing bolt holes 11 provided between the mounting portion 40a and the mounting portion 40b are each provided at equal intervals. That is, in FIG. 1, the fixing bolt hole 11a and the fixing bolt hole 11b are made to correspond to the fixing bolt insertion hole 35 of the bracket 30, and the beam material 10B is fixed to the bracket 30. It is also possible to make the fixing bolt hole 11b and the fixing bolt hole 11d correspond to the fixing bolt insertion hole 35 of the bracket 30. That is, the two fixing bolt holes 11 selected from the plurality of fixing bolt holes 11 formed in the longitudinal direction of the beam material 10 are arranged at intervals corresponding to the fixing bolt insertion holes 35 of the bracket 30. Therefore, the beam material 10 may be fixed to the bracket 30 by appropriately selecting two fixing bolt holes 11. With this configuration, the beam material 10B can be fixed to the column even if the interval between the column 20A and the column 20B is set to a distance different from that in FIG. 1. For example, when there is an obstacle when installing the vehicle guard rail 100, the installation interval of the columns 20 can be changed, so that there is an advantage that the vehicle guard rail 100 can be applied according to the environment. be. Further, even when the error in the installation interval of the erected columns 20 is large, the beam material 10 can be adjusted and attached, so that the vehicle guard fence 100 can be easily installed.

The fixing bolt holes 11a to the fixing bolt holes 11f are arranged along the longitudinal direction of the beam material 10B. The fixing bolt holes 11e and 11f in the other mounting portion 40b of the beam material 10B have the same configuration as the fixing bolt holes 11a and 11b. The fixing bolt holes 11a to 11f may be collectively referred to as a fixing bolt hole 11. The fixing bolt holes 11 provided between the mounting portion 40a and the mounting portion 40b and between the mounting portion 40b and the mounting portion 40c are "surfaces located between the adjacent mounting portions" of the present invention. It corresponds to a "hole that penetrates through".

As shown in FIG. 3, the beam material 10 has a corrugated cross section in a direction perpendicular to the longitudinal direction. In other words, an uneven shape is formed. The beam material 10 has two peaks and a valley formed between the two peaks in a cross section perpendicular to the longitudinal direction. The fixing bolt hole 11 is provided at the bottom 16 of the valley portion. Since the fixing bolt holes 11 are installed at the bottom 16 of the valley portion, the blockout amount, which is the distance from the support column 20 to the beam material 10, can be increased.

(Bolt hole 12 for connecting the beam material 10)
As shown in FIG. 1, in the vehicle guard fence 100, the beam material 10B is connected to the adjacent beam material 10A at the attachment portion 40a at one end. As shown in FIG. 3, since the beam material 10A and the beam material 10B have the same cross-sectional shape perpendicular to the longitudinal direction, the beam material 10A and the beam material 10B are overlapped with each other in a concavo-convex shape. The beam material 10A and the beam material 10B are provided with connection bolt holes 12 at the tops of the two peaks in a cross section perpendicular to the longitudinal direction, and the positions of the connection bolt holes 12 provided in each are aligned with each other. It is piled up like this. A connecting bolt 60 is inserted into the connecting bolt hole 12 between the beam material 10A and the beam material 10B. A connecting nut 61 is fastened to the inserted connecting bolt 60, and the beam material 10A and the beam material 10B are joined so that the overlapped portions do not separate from each other. In the first embodiment, the beam material 10A and the beam material 10B are overlapped so that the beam material 10B is located on the road side, and the connection bolts 60 are fastened at the four connection bolt holes 12. There is. Further, in the beam material 10B, an end member 70 is attached to an end portion on the side opposite to the side connected to the beam material 10A. The end member 70 is overlapped on the front side of the beam material 10B at the mounting portion 40c and fastened by a connecting bolt 60. That is, the vehicle guard fence 100 is overlapped and fixed so that the end member 70 is located on the road side and the beam material 10B is located on the road shoulder side.

A plurality of connecting bolt holes 12 are provided in the longitudinal direction of the beam material 10. In the first embodiment, the connecting bolts 60 are inserted through the connecting bolt holes 12a and 12c, but a plurality of holes having the same shape are provided at equal intervals along the longitudinal direction of the beam material 10B. The beam material 10A adjacent to the beam material 10B is also formed in the same manner. Therefore, for example, the beam material 10A and the beam material 10B can align the positions of the connection bolt holes 12 even if the connection bolt holes 12 are overlapped with each other by shifting them by one interval in the longitudinal direction, and are connected to the connection bolt holes 12. The bolt 60 can be inserted. Conventionally, the columns 20 of the vehicle guard fence 100 need to be erected at intervals according to the mounting portion 40 of the beam material 10, and there is a problem that it is difficult to erection the intervals of the columns 20 with high accuracy. rice field. However, even when the columns 20 are not installed at equal intervals, the length of the portion where the beam materials 10 are overlapped with each other can be adjusted, so that the degree of freedom in installing the vehicle guard fence 100 is increased. The connection bolt holes 12 provided between the mounting portions 40a and the mounting portions 40b and between the mounting portions 40b and the mounting portions 40c are "surfaces located between the adjacent mounting portions" of the present invention. It corresponds to a "hole that penetrates through". The space between the mounting portion 40a and the mounting portion 40b and between the mounting portion 40b and the mounting portion 40c means the range shown by the intermediate portion 50 in FIG.

(Through holes 13 and 14 of the beam material 10)
As shown in FIG. 1, a plurality of through holes 13 are provided along the longitudinal direction of the beam material 10 in the inclined portion 19 connecting the top portion 17 of the mountain portion and the bottom portion 16 of the valley portion of the beam material 10. There is. Further, in FIG. 1, a plurality of through holes 14 are provided along the longitudinal direction of the beam material 10 in the end inclined portions 18 located on the upper side and the lower side of the top portion 17 of the mountain portion of the beam material 10. The size of the through hole 13 and the through hole 14 can be appropriately set. In order to improve the visibility of the other side of the beam material 10, it is desirable that the through holes 13 and the through holes 14 occupy a large area on the surface of the beam material 10.

The through hole 13 and the through hole 14 are provided so as to be displaced from each other in the longitudinal direction of the beam material 10 with respect to the fixing bolt hole 11 and the connecting bolt hole 12. That is, the through hole 13 and the through hole 14 are arranged so as to be located at the center between the two fixing bolt holes 11 adjacent to each other in the longitudinal direction of the beam material 10. In other words, the through holes 13 and the through holes 14 are arranged in a staggered arrangement with respect to the fixing bolt holes 11 and the connecting bolt holes 12. The through holes 13 and the through holes 14 provided between the mounting portions 40a and the mounting portions 40b and between the mounting portions 40b and the mounting portions 40c are located between the adjacent mounting portions of the present invention. It corresponds to a "hole that penetrates the surface".

FIG. 4 is a schematic diagram illustrating the positional relationship between the fixing bolt holes 11, the connecting bolt holes 12, and the through holes 13 and 14 of the beam material 10 of FIG. As shown in FIG. 4, the through hole 13 and the through hole 14 have a long hole shape that is longer in the longitudinal direction of the beam material 10 than the fixing bolt hole 11 and the connecting bolt hole 12. With such a configuration, the beam material 10 has a large area of holes in which the other side can be visually recognized when viewed from the road side, so that the visibility is improved. Further, it is desirable that the distance M between the adjacent fixing bolt holes 11 or the connecting bolt holes 12 is set to be larger than the length L of the through holes 13 and the through holes 14. With this configuration, it is possible to suppress a decrease in the cross-sectional area in the direction perpendicular to the longitudinal direction of the beam material 10, so that the vehicle guard fence 100 suppresses a decrease in strength and a decrease in energy absorption. , The visibility of the other side of the beam material 10 can be improved.

The width W of the through hole 13 and the beam material 10 of the through hole 14 in the direction perpendicular to the longitudinal direction is formed to be smaller than the width H of the fixing bolt hole 11 and the connecting bolt hole 12. This has the advantage that the fixing bolt 31 or the connecting bolt 60 is not erroneously inserted into the through hole 13 or the through hole 14, and the efficiency of the assembling work of the beam material 10 is improved.

In the beam material 10 according to the first embodiment, the through holes 13 and the through holes 14 are arranged in a staggered manner with respect to the fixing bolt holes 11 and the connecting bolt holes 12, but the present invention is limited to this. Not done. For example, the fixing bolt holes 11, the connecting bolt holes 12, the through holes 13, and the through holes 14 may be arranged vertically in the longitudinal direction of the beam material 10, and five holes may be arranged in the vertical direction in FIG. The above may be arranged. In this case, the cross-sectional area of the beam material 10 is reduced, but the strength and the amount of energy absorbed can be ensured by using the beam material 10 as a material having high strength. With such a configuration, the visibility of the other side of the beam material 10 can be further improved, and the weight of the beam material 10 can be reduced.

Embodiment 2.
In the second embodiment of the present invention, the position and shape of the holes provided in the beam material 10 are changed with respect to the vehicle guard fence 100 according to the first embodiment. In the second embodiment, the changes to the first embodiment will be mainly described.

FIG. 5 is a front view showing the beam material 210 of the vehicle guard rail 200 according to the second embodiment of the present invention. FIG. 6 is a diagram showing a cross section of the beam material 210 of FIG. The beam material 210 is attached to the support column 20 in place of the beam material 10 of the vehicle guard fence 100 according to the first embodiment. In the beam material 210 shown in FIG. 5, a large number of fixing bolt holes 211 and connecting bolt holes 212 are provided at narrower intervals than in the first embodiment.

The beam material 210 is not provided with the beam material 210 corresponding to the through holes 13 and 14 of the beam material 10 according to the first embodiment. That is, although holes are provided in the top 17 of the uneven mountain portion and the bottom 16 of the valley in the cross section perpendicular to the longitudinal direction of the beam material 210, the top 17 of the mountain and the bottom 16 of the valley are connected. No holes are provided in the inclined portion 19 and the end inclined portion 18 located on the upper side and the lower side of the top portion 17 of the mountain portion. With this configuration, the top 17 of the mountain portion and the bottom 16 of the valley portion are provided with many holes, and the top 17 and the bottom 16 have many lightening portions, but the beam material in the cross section perpendicular to the longitudinal direction. The decrease in the cross-sectional area of 210 is suppressed. Therefore, the beam material 210 can improve the visibility of the other side of the beam material 210 while suppressing the decrease in strength and the decrease in the amount of energy absorption.

FIG. 7 is a schematic diagram illustrating the positional relationship between the fixing bolt hole 211 and the connecting bolt hole 212 of the beam material 210 of FIG.
When the beam material 210 is attached to the support column 20, the fixing bolt holes 211 through which the fixing bolts 31 are inserted have a positional relationship in which two fixing bolt holes 211 are sandwiched between them. That is, in FIG. 7, if one fixing bolt 31 is inserted through the fixing bolt hole 211a, the other fixing bolt 31 is inserted through the fixing bolt hole 211d. However, the fixing bolt hole 211 into which the fixing bolt 31 is inserted can be appropriately changed according to the position of the fixing bolt insertion hole 35 provided in the bracket 30.

The connection bolt holes 212 through which the connection bolts 60 for connecting the two adjacent beam materials 210 are inserted have a positional relationship in which two connection bolt holes 212 are sandwiched between them. That is, in FIG. 7, if one connection bolt 60 is inserted through the connection bolt hole 212a, the other connection bolt 60 is inserted through the connection bolt hole 212d. However, since the two adjacent beam materials 210 are overlapped so that the positions of the connecting bolt holes 212 are aligned, the fastening position of the connecting bolt 60 can be changed as appropriate. It is also easy to increase the number of connecting bolts 60 to be fastened. By increasing the number of connecting bolts 60 to be fastened, it is possible to prevent the portions where the two adjacent beam materials 210 are overlapped from each other. Therefore, when a vehicle or the like collides with the vehicle guard fence 200, it is possible to prevent a metal piece from being caught between the beam materials 210.

Embodiment 3.
In the third embodiment of the present invention, the position and shape of the holes provided in the beam material 10 are changed with respect to the vehicle guard fence 100 according to the first embodiment. In the third embodiment, the changes to the first embodiment will be mainly described.

FIG. 8 is a front view showing the beam material 310 of the vehicle guard rail 300 according to the third embodiment of the present invention. FIG. 9 is a diagram showing a cross section of the beam material 310 of FIG. The beam material 310 is attached to the support column 20 in place of the beam material 10 of the vehicle guard fence 100 according to the first embodiment. In the beam material 310 shown in FIG. 7, the fixing bolt holes 311 and the connecting bolt holes 312 are formed longer in the longitudinal direction of the beam material 310 than in the first embodiment. Further, the distance between the fixing bolt holes 311 and the connecting bolt holes 312 is also narrowed.

The beam material 310 is not provided with the beam material 310 corresponding to the through holes 13 and 14 of the beam material 10 according to the first embodiment. That is, although holes are provided in the top 17 of the uneven mountain portion and the bottom 16 of the valley in the cross section perpendicular to the longitudinal direction of the beam material 310, the top 17 of the mountain and the bottom 16 of the valley are connected. No holes are provided in the inclined portion 19 and the end inclined portion 18 located on the upper side and the lower side of the top portion 17 of the mountain portion. With this configuration, the top 17 of the mountain portion and the bottom 16 of the valley portion are provided with many holes, and the top 17 and the bottom 16 have many lightening portions, but the beam material in the cross section perpendicular to the longitudinal direction. The decrease in the cross-sectional area of 310 is suppressed. Therefore, the beam material 310 can improve the visibility of the other side of the beam material 310 while suppressing the decrease in strength and the decrease in the amount of energy absorption.

FIG. 10 is a schematic diagram illustrating the positional relationship between the fixing bolt holes 311 and the connecting bolt holes 312 of the beam material 310 of FIG.
When the beam material 310 is attached to the support column 20, the two fixing bolts 31 can be inserted into the same fixing bolt hole 311. That is, in FIG. 8, if the fixing bolt 31 is inserted into the fixing bolt hole 311a, the other fixing bolt 31 is inserted into the fixing bolt hole 311a. However, the fixing bolt hole 311 into which the fixing bolt 31 is inserted can be appropriately changed according to the position of the fixing bolt insertion hole 35 provided in the bracket 30. For example, in FIG. 10, one fixing bolt 31 may be inserted into the fixing bolt hole 311a, and the other fixing bolt 31 may be inserted into the fixing bolt hole 311b. With this configuration, when the beam material 310 is fixed to the support column 20, the position of the fixing bolt 31 can be freely changed, so that the beam material 310 can be adjusted and attached, and thus the vehicle protection. Installation of the fence 300 becomes easy. In the beam material 310 of the third embodiment, the fixing bolt holes 311 are formed longer in the longitudinal direction than the beam material 10 according to the first embodiment and the beam material 210 according to the second embodiment. There is an advantage that it is easier to finely adjust the fastening position of the fixing bolt 31.

The connecting bolt 60 that connects two adjacent beam materials 310 to each other can be inserted into the same connecting bolt hole 312. That is, in FIG. 10, if the connection bolt 60 is inserted through the connection bolt hole 312a, the other fixing bolt 31 is also inserted through the connection bolt hole 312a. However, since the two adjacent beam materials 310 are overlapped so that the positions of the connecting bolt holes 312 are aligned, the fastening position of the connecting bolt 60 can be appropriately changed. It is also easy to increase the number of connecting bolts 60 to be fastened. By increasing the number of connecting bolts 60 to be fastened, it is possible to prevent the portions where the two adjacent beam materials 310 are overlapped from each other. Therefore, when a vehicle or the like collides with the vehicle guard fence 300, it is possible to prevent a metal piece from being caught between the beam materials 310.

10 beam material, 10A beam material, 10B beam material, 11 fixing bolt hole, 11a fixing bolt hole, 11b fixing bolt hole, 11c fixing bolt hole, 11d fixing bolt hole, 11e fixing bolt hole, 11f fixing Bolt holes for, 12 connection bolt holes, 12a connection bolt holes, 12c connection bolt holes, 13 through holes, 14 through holes, 16 bottoms, 17 tops, 18 end slopes, 19 slopes, 20 columns, 20A Strut, 20B strut, 20C strut, 21 bracket fixing bolt, 22 bracket fixing bolt, 30 bracket, 31 fixing bolt, 32 fixing nut, 33 strut fixing part, 34 both ends, 35 fixing bolt insertion hole, 40 mounting part , 40a mounting part, 40b mounting part, 40c mounting part, 60 connection bolt, 61 connection nut, 70 end member, 100 vehicle protection fence, 200 vehicle protection fence, 210 beam material, 211 fixing bolt hole, 211a fixing bolt hole, 211b fixing bolt hole, 211d fixing bolt hole, 212 connection bolt hole, 212a connection bolt hole, 212d connection bolt hole, 300 vehicle protection fence, 310 beam material, 311 fixing bolt Hole, 312 connection bolt hole, 312a connection bolt hole, B arrow.

Claims (10)

A beam material for a vehicle guard rail that is formed of plate material and is attached to columns that are erected at predetermined intervals.
The plate material is
A plurality of mounting portions arranged in the longitudinal direction fixed to each of the plurality of columns, and a plurality of mounting portions.
With a hole through the surface located between the adjacent mounting portions ,
The hole is
Multiple pieces are formed in the longitudinal direction of the plate material,
The mounting part is
It has a fixing bolt hole through which a fixing bolt for fixing to the support column is inserted.
The fixing bolt holes are
A beam material for a vehicle guard rail that has the same shape as the hole . The mounting part is
It also has a connecting bolt hole through which a connecting bolt for connecting the plurality of the plate members is inserted.
The connection bolt holes are
The beam material for a vehicle guard rail according to claim 1 , which has the same shape as the hole. The plate material is
A cross section perpendicular to the longitudinal direction is formed in an uneven shape,
The uneven shape is
It has two peaks and a valley formed between the peaks.
The fixing bolt holes are
Provided at the bottom of the valley
The connection bolt holes are
The beam material for a vehicle guard fence according to claim 2 , which is provided at the top of the mountain portion. The beam material for a vehicle guard rail according to claim 3 , further comprising a through hole provided in a portion other than the top of the mountain portion and the bottom of the valley portion. The holes and the through holes are staggered and arranged.
The spacing between the holes arranged next to each other in the longitudinal direction of the plate material is
The beam material for a vehicle guard rail according to claim 4, which is larger than the longitudinal dimension of the plate material of the through hole. The width of the through hole is
The beam material for a vehicle guard rail according to claim 5, which is smaller than the width of the hole. The plate material is
The fixing bolt is fixed to the support column by a bracket provided with a fixing bolt insertion hole through which the fixing bolt is inserted.
The two selected holes among the plurality of holes formed in the longitudinal direction of the plate material are
The beam material for a vehicle guard rail according to any one of claims 1 to 6, which is arranged at an interval corresponding to the fixing bolt insertion hole of the bracket. A beam material for a vehicle guard rail that is formed of plate material and is attached to columns that are erected at predetermined intervals.
The plate material is
A plurality of mounting portions arranged in the longitudinal direction fixed to each of the plurality of columns, and a plurality of mounting portions.
With a hole through the surface located between the adjacent mounting portions ,
The hole is
Multiple pieces are formed in the longitudinal direction of the plate material,
The mounting part is
It has a connection bolt hole through which a connection bolt for connecting a plurality of the plate members is inserted.
The connection bolt holes are
A beam material for a vehicle guard rail that has the same shape as the hole . The hole is
The beam material for a vehicle guard rail according to any one of claims 1 to 8, which is formed in a plurality of directions perpendicular to the longitudinal direction of the plate material. The hole is
The beam material for a vehicle guard rail according to any one of claims 1 to 9, which is a long hole long in the longitudinal direction of the plate material.

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