JPH10121430A - Protective fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly prevent deviation of a vehicle from a road or intrusion of stone falling in the inside of the road. SOLUTION: A protective fence is supported on a support 12 erected on a ground R in a state where a first arm 17 is projected sideward by a large diametrical bolt 15b and a small diametrical bolt. A second arm 18 is supported on a head end part of the first arm 17 by a large diametrical stud 22b and a small diametrical stud. A guard rail plate 21 is fixed on the second arm 18. Reaction to a vehicle S is reduced by absorbing impact force as the bolts and the studs shear it and directly catching it by the support 1 thereafter at the time when the vehicle collides. Thereby, popping of loaded articles and falling stones as well as the collided vehicle S is prevented as the first arm 17 and the second arm 18 are revolved around the large diametrical bolt 15b and the large diametrical stud 22 as their center, the guide rail plate 21 is moved upward and its height comes to be increased height H2 from initial height.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective fence installed along the traveling lane of a vehicle at the shoulder or center of a road or bridge.

[0002]

2. Description of the Related Art Conventionally, a protective fence is provided along the traveling lane of a vehicle at the shoulder or center of a road or a bridge.
Prevention of falling or entry of falling rocks into the road is prevented. As shown in FIG. 18, the protective fence 1 is generally composed of a support pillar 1 erected on a road surface R and a metal guard rail plate 3 attached by a mounting bracket 2. It is also known that a wire rope is stretched in place of the guardrail plate 3.

[0003]

By the way, in any of the above-mentioned protective fences, if the impact force is large when a vehicle or a rock falls, as shown in FIG. There was a risk that the vehicle would bend and the height of the entire protective fence would be reduced, and a collision vehicle, a vehicle load or a rockfall would jump over the protective fence. In particular, if the asphalt pavement is raised on the road for road maintenance,
Also, when rocks caused by spills from dump trucks on a curve or small landslides on the mountain surface accumulate on the road, the height of the protective fence may be reduced, and the function may not work properly. there were.

The present invention has been made in view of the above circumstances, and when a vehicle or a rock falls, it is possible to reliably prevent the collision vehicle from deviating from the road and jumping over a load of the vehicle or the rock. It is intended to provide a protective fence.

[0005]

In order to achieve the above object, a protective fence according to claim 1 is a protective fence provided on a road or a bridge for receiving a collision object such as a vehicle or a falling rock. An upright support, and a guardrail portion supported by the support, wherein the guardrail portion is connected to the support by a first arm connected to the support by a pair of pins having different diameters. An impact receiving member supported by the distal end of the first arm to receive the collision object; and the first arm pivots upward about a large-diameter pin to move the impact receiving member upward. And a stopper for stopping the rotation of the first arm by hitting the support post, and the first arm has a connection point by a large-diameter pin,
When the collision object collides with the impact receiving member, the collision force is disposed below the height position where the impact force acts, and the small-diameter pin is sheared by the impact force due to the collision of the collision object, thereby causing the large-diameter pin to shear. It is characterized in that it is pivoted upward about a connection point by a pin.

According to a second aspect of the present invention, there is provided the protective fence according to the first aspect, wherein the impact receiving member is supported via a second arm connected to the first arm by a pair of pins having different diameters. It is characterized by comprising a plate-shaped guardrail plate. The protective fence according to claim 3 is claim 1.
In the protective fence according to the above, the impact receiving member may be the first fence.
A bracket having an annular holding portion provided at the end of the arm is inserted into the holding portion and is constituted by a rod body held rotatably and axially movable.

According to a fourth aspect of the present invention, in the protective fence according to any one of the first to third aspects, an intermediate portion of the first arm is connected to the support, and the stopper is provided on the first arm. Is provided at the rear end. According to a fifth aspect of the present invention, there is provided a protective fence according to any one of the first to fourth aspects, wherein the guardrail portions are provided on both sides of the support.

According to a sixth aspect of the present invention, there is provided the protective fence according to any one of the first to fifth aspects, wherein the guardrail portion is provided in a plurality of stages in the vertical direction of the support. The protective fence according to claim 7 is claim 1.
7. The protective fence according to claim 6, further comprising a detection unit that detects that the first arm has rotated, and outputs a detection signal of the rotation.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a guard fence according to an embodiment of the present invention. 1 and 2, reference numeral 11 denotes a protective fence. The protective fence 11 includes a support 12 erected on a road surface R and a guard rail 13 provided on the support 12.

The guardrail section 13 includes a pair of first arms 17 which are connected to the support column 12 at two locations by a pair of bolts (pins) 15 and nuts 16 via a reinforcing plate 14 formed in a U-shape. An L-shaped second arm 18 provided at the distal end of each of the first arms;
The arm 18 comprises a guard rail plate 21 fastened and fixed to the arm 18 by bolts 19 and nuts 20. The reinforcing plate 14 is provided to reinforce the reduced strength by forming a hole for inserting the bolt 15 into the column 12.

The first arm 17 constituting the guard rail portion 13 is bent at an intermediate portion, and a tip end side to which the second arm 18 is connected is protruded to the side. A pair of studs (pins) 22 having external threads formed thereon are fixed to the side surface near the distal end of the first arm 17 by welding, and these studs 22 are formed on the second arm 18. It is connected to the first arm 17 by being inserted into the hole and fastening the nut 23 from the outside.

The bolt 15 connecting the support 12 to the first arm 17 and the stud 22 connecting the first arm 17 to the second arm 18 are large at both ends of the first arm 17. Diameter. The first arm 17 is rotatably connected to the column 12 by the large-diameter bolt 15b, and the rotation of the first arm 17 with respect to the column 12 is restricted by the small-diameter bolt 15a. The second arm 18 is rotatably connected to the first arm 17 by the first arm 17 and the first arm 1 by the small diameter stud 22a.
The rotation of the second arm 18 with respect to 7 is restricted.

The connecting portion of the first arm 17 to the support column 12 by the large-diameter bolt 15b is located below the position where the impact force acting on the guardrail plate 21 when the collision object collides with the guardrail plate 21. It has been. Reference numerals 24 and 25 in the figure denote bolts and nuts that connect the adjacent guardrail plates 21.

When the vehicle S collides with the protective fence 11 having the above structure, the impact is received by the guardrail plate 21,
Further, the power is transmitted to the second arm 18 and the first arm 17 and transmitted to the support 12. Then, at the connection point between the first arm 17 and the support 12, the respective bolts 15 a, 15
When an impact force is applied to the small bolt 15a and the small-diameter bolt 15a cannot withstand the impact force, the small-diameter bolt 15a shears, and the first arm 17 is rotated upward about the large-diameter bolt 15b as an axis. 1 arm 17 and 2nd arm 18
When the small-diameter stud 22a cannot withstand the impact force at the connection point with the small-diameter stud 22a, the small-diameter stud 22a shears,
The second arm 18 pivots downward with respect to the first arm 17 around the large diameter stud 22b.

Here, the connecting portion of the first arm 17 to the column 12 by the large-diameter bolt 15b is a guard rail plate 21.
Lower than the position where the impact force acting on the guardrail plate 21 is applied when the vehicle S collides with the guardrail plate 21, the first arm 17
Will always rotate upward about the large diameter bolt 15b. As described above, the small-diameter bolt 15a and the small-diameter stud 22a are sheared, so that the impact force acting on the guardrail plate 21 is gradually absorbed.

As shown in FIG. 3, these small diameter studs 2
2a and the small-diameter bolt 15a are sheared, and the first arm 17 rotates upward about the large-diameter bolt 15b as an axis.
When the arm 18 pivots downward about the large diameter stud 22b, the guardrail plate 21 hits the column 12, and the rotation of the first arm 17 and the second arm 18 stops. Can be accepted. In other words, the guardrail plate 21 that hits the support 12 serves as a stopper that stops the rotation of the first arm 17 and the second arm 18. Further, when the first arm 17 and the second arm 18 rotate as described above, the guardrail plate 21 moves upward, and the height thereof becomes the height H2 increased from the initial height H1.

As described above, according to the protective fence 11 having the above-described structure, when the vehicle S collides, the impact force is absorbed by the small-diameter bolt 15a and the small-diameter stud 22a being sheared. What they take directly,
That is, since the impact force of the vehicle S is absorbed stepwise, the reaction force to the vehicle S can be reduced, and damage to the vehicle S can be minimized. Further, when the vehicle S collides, the first arm 17 and the second arm 18 rotate, and the guardrail plate 21 moves upward to increase its height. It is possible to reliably prevent the load from jumping out, and to prevent a secondary disaster caused by the vehicle S falling or the load jumping out of the protective fence.

Also, asphalt pavement is raised on the road for maintenance of the road, or earth and sand spilled from the dump truck in a curve or the like and small rocks caused by landslides on the mountain surface accumulate on the road to protect the road. Even if the height of the fence is reduced, the height of the fence is increased at the time of a collision, so that the function as a protective fence can be reliably obtained. In the above-described protective fence 11, the first arm 17 and the second arm 18 are provided in a pair, respectively. However, the first arm 17 and the second arm 18 are provided one by one on one side of the column 12, and the guard rail plate 21 is provided. May be supported.

Since the first arm 17 and the second arm 18 are connected by the stud 22 provided on the side surface of the first arm 17, the vehicle S collides and the first arm 17 and the second arm 18 are connected. There is no inconvenience such that the connecting portion hits the support 12 when the is rotated. That is,
In the case of fastening with bolts and nuts, the head or nut of the bolt projects to the inner surface side of the first arm 17,
When the first arm 17 and the second arm 18 rotate,
Although these protruding parts will hit the columns 12,
The above structure does not have such a thing. However, any bolt can be used here as long as its head does not protrude beyond the thickness of the reinforcing plate 14. In the above example, the guardrail plate 21 is a stopper for stopping the rotation of the first arm 17 and the second arm 18, but a stopper of another member may be provided on the first arm 17 or the support 12. .

FIG. 4 shows a first embodiment which is bent at an acute angle.
The protection fence 11 having the arm 17 and having a small bolt 15a connected to the column 12 at the end (upper side) of the first arm 17.

As shown in FIG. 5, also in the case of the protective fence 11, when the vehicle S collides, the impact force is absorbed by the small-diameter bolt 15a and the small-diameter stud 22a being sheared. 12 can directly receive the impact force, absorb the impact force in a stepwise manner, reduce the reaction force to the vehicle S, and further reduce the first arm 17 and the second arm 17.
Since the arm 18 rotates and the guardrail plate 21 moves upward to increase the height from the initial height H1 to the height H2, it is possible to reliably prevent the colliding vehicle S or the load from jumping out. it can.

FIG. 6 shows a protective fence 11 using a column 12 having a low height. The protective fence 11 is formed as a straight line as the first arm 17, and its middle portion is formed by a large-diameter bolt 15b. It is connected to the support 12. A connecting piece 17a projecting obliquely downward is provided at an intermediate portion of the first arm 17, and the connecting piece 17a is connected to the column 12 by a small-diameter bolt 15a. At the rear end of the first arm 17, a stopper 26 protruding toward the column 12 is provided.

According to the protective fence 11, when the vehicle S collides, the impact force is absorbed by the small diameter bolt 15a and the small diameter stud 22a being sheared. The small-diameter bolt 15a and the small-diameter stud 22a
Is sheared, the first arm 17 rotates around the large diameter bolt 15b, and the second arm 18 rotates around the large diameter stud 22b. In this manner, when the first arm 17 rotates, as shown by a two-dot chain line in FIG.
A stopper 2 provided at the rear end of the first arm 17
6 hits the lower side of the column 12, the rotation of the first arm 17 is stopped, the guardrail plate 21 is arranged at the upper position, and the height thereof is increased from the initial height H1 to the height H.
It becomes 2.

As described above, in the case of the protective fence 11 having this structure, the stopper 2 provided at the rear end of the first arm 17 is used.
Since the rotation of the first arm 17 is stopped by hitting the support 6 against the support 12, the height of the support 12 can be reduced. Thereby, this protection fence 11
A slender fence that does not protrude upward from the column 12 can be provided, and the appearance can be improved, and the protective fence can be provided with good visibility.

As shown in FIG. 7, the fixing piece 17a formed on the first arm 17 may be projected upward, so that when the first arm 17 rotates, As shown by the two-dot chain line in FIG.
Is projected to the side opposite to the collision side of the vehicle S, so that the interference of the fixed piece 17a with the collision vehicle S can be prevented.

FIG. 8 shows a pipe (bar) instead of the guardrail plate 21 attached to the second arm 18.
31 having a guardrail portion 13 provided with
Further, these guard rail portions 13 are provided on the support column 12 in two upper and lower stages. The guardrail portion 13 has a bracket 34 fastened and fixed by a bolt 32 and a nut 33 at the tip of the first arm 17, and a holding portion 34 a formed on the bracket 34.
, The pipe 31 is inserted and held. The inner diameter of the holding portion 34a is slightly larger than the outer diameter of the pipe 31. As a result, the pipe 31 held by the holding portion 34a rotates and moves in the axial direction with respect to the bracket 34. Can be moved.

As shown in FIG. 9, the protective fence 11 having the above structure
In the case of, also, when the vehicle S collides, the impact force is absorbed by the small-diameter bolt 15a being sheared, and thereafter the strut 12 directly receives the impact force, so that the impact force can be absorbed step by step. The reaction force to S can be reduced,
Further, the first arm 17 rotates, and the pipe 31 moves upward to increase the height from the initial height H1 to the height H2.
Therefore, the colliding vehicle S or the loaded object can be reliably prevented from jumping out. Moreover, this protective fence 1
According to 1, since the guardrail portions 13 are provided in two upper and lower stages, especially in the case of a large vehicle S, the vehicle body can be received by the upper guardrail portion 13 and the wheels can be received by the lower guardrail portion 13. it can.

In this case, as shown in FIG.
Even if the collision point 1 moves upward, the pipe 31 is held by the holding portion 34a of the bracket 34 in a state where the pipe 31 can rotate and move in the axial direction. A force such as a twist is not applied, and the impact at the time of the collision of the vehicle S can be further absorbed by pulling and shifting the pipe 31 to the collision location of the vehicle S.

11 has a guard rail 13 to which a wire rope (rod) 41 is attached at the tip of the first arm 17, and furthermore, these guard rails 13 are arranged in four steps above and below the column 12. As shown in FIG. It is provided. These guard rails 13 include a U-shaped tip at the end of the first arm 17.
H-shaped hooks (holding portions) 43 are fastened and fixed by nuts 42, and the wire ropes 41 are inserted and supported by the hooks 43, respectively.

As shown in FIG. 12, the protective fence 1 having the above structure is used.
Also in the case of 1, when the vehicle S collides, the impact force is absorbed by the small-diameter bolt 15a being sheared. Thereafter, the strut 12 directly receives the impact force, and the impact force can be gradually absorbed. The reaction force on the vehicle S can be reduced,
Further, since the first arm 17 rotates and the wire rope 41 moves upward and the height thereof increases from the initial height H1 to the increased height H2, it is ensured that the colliding vehicle S or the loaded object jumps out. Can be prevented.

Moreover, according to the protective fence 11, the upper and lower 4
Since the guard rail portion 13 is provided at the step, as described above, particularly in the case of the large vehicle S, the vehicle body can be received by the upper guard rail portion 13 and the wheels can be received by the lower guard rail portion 13. Further, according to the protection fence 11, the impact force at the time of the collision of the vehicle S can be absorbed by the bending of the wire rope 41, and the reaction force to the vehicle S can be further reduced.

FIG. 13 shows an example of a protective fence for catching a falling rock, which has a guard rail 13 to which a wire rope 41 is attached at the tip of a first arm 17. Are provided in three stages above and below. A wire netting (impact receiving member) 45 is provided on the wire rope 41 of the guardrail portion 13 vertically. In each of the guardrail portions 13, a bracket 46 is fastened and fixed to an end portion of a first arm 17 formed of an L-shaped angle by a bolt 47 and a nut 48. An annular holding portion 46a provided on the bracket 46 The wire rope 41 is inserted and supported, and the wire mesh 45 is supported by the wire rope 41. The column 12 on which the guardrail portion 13 is supported is made of H steel, and a small-diameter bolt 15a is attached to a flange 12a constituting the H steel.
The first arm 17 is connected by a large-diameter bolt 15b.

In the case of the protective fence 11 having the above-mentioned structure, when a falling rock is generated, the falling rock is received by the wire mesh 45, and the impact force is absorbed by the small diameter bolt 15a being sheared. It is possible to absorb the impact force in a stepwise manner, to reliably receive the falling rock, and furthermore, the first arm 17 is rotated, and the wire mesh 45 supported by the wire rope 41 together with the wire rope 41. Moves upward to increase the height from the initial height H1 to the height H2, so that the falling rocks that have collided can be reliably prevented from jumping out.

Further, according to the protective fence 11, the upper and lower three
Since the wire mesh 45 is supported by the guardrail portion 13 provided on the step, a large rock fall can be received on the upper side of the wire mesh 45 and a small rock fall can be received on the lower side.
Further, according to the protective fence 11, the impact force at the time of the collision of the falling rock can be absorbed by the bending of the wire netting 45 together with the wire rope 41, and the falling rock can be reliably received.

In the case of this protective fence 11, a wire mesh 45
For example, the protective fence 11 is installed with the wire mesh 45 facing outward on the mountain side shoulder such as a forest road, or the wire fence is mounted on the mountain side of a building built in a location facing the mountain. 45 is directed outward.

In the protective fence 11 of the above embodiment,
In each case, the collision of the vehicle S from one side is received. However, it is a matter of course that these protective fences 11 may be provided on both sides of the column 12, and may be installed in the median strip. here,
An example of a double-sided protective fence that receives a collision of the vehicle S from both sides of the support 12 will be described with reference to FIG.

As shown in FIG. 14, the protective fence 11 is provided with a support column 12 and two upper and lower guard rail portions 13. Each of the guardrail portions 13 has a first arm 17 having an intermediate portion connected to the column 12, and a second arm 18 to which a guardrail plate 21 is fixed is connected to both ends of the first arm 17, respectively. I have. The first arm 17 forming the guard rail portion 13 is supported by the small-diameter bolt 15a and the large-diameter bolt 15b.
It is connected to.

In the case of the protective fence 11, for example, when the vehicle S collides from one side, the impact force is absorbed by shearing the small-diameter bolt 15a and the small-diameter stud 22a. Can directly absorb the impact force, absorb the impact force in a stepwise manner, reduce the reaction force to the vehicle S, and furthermore,
And the second arm 18 is rotated, and the guard rail plate 21 is rotated.
Moves upward and its height increases, and the vehicle S
Alternatively, it is possible to reliably prevent the load from jumping out to the opposite lane.

FIGS. 15 and 16 show a double-sided protective fence 11 using a pipe 31 instead of the guardrail plate 21. FIG. Prop 12 constituting this protective fence 11
Are provided with a guard rail portion 13 in two upper and lower stages, and a first arm 17 constituting this guard rail portion 13 is provided.
Is provided with large-diameter pipe portions 51 at both ends thereof.
The pipe 31 is inserted and supported in large-diameter pipe sections 51 provided at both ends of the first arm 17. In this case as well, the inner diameter of the large-diameter pipe portion 51 is slightly larger than the outer diameter of the pipe 31, so that the pipe 31 held by the large-diameter pipe 51 Is held in a state where it can be turned and moved in the axial direction. FIG.
Reference numeral 52 denotes a connecting pipe for connecting the pipes 31 to each other. The pipes 31 are fitted from both ends of the connecting pipe 52 and fastened by bolts 53 and nuts 54 so as to be connected to each other. ing.

In the case of the protective fence 11, for example, when the vehicle S collides from one side, the impact force is absorbed by the small-diameter bolt 15a being sheared. The impact force is absorbed step by step, and the reaction force to the vehicle S can be reduced. Further, the first arm 17 rotates, the pipe 31 moves upward, and the height thereof becomes the initial height. The height increases from H1 to H2, and the collision of the vehicle S or the loaded object in the opposite lane can be reliably prevented.

As described above, according to the protective fence 11 of the above embodiment, when the vehicle S collides, the impact force is absorbed by the small-diameter bolt 15a and the small-diameter stud 22a being sheared. What is received directly by the support pillars 12, that is, the impact force of the vehicle S can be gradually absorbed, whereby the reaction force to the vehicle S can be reduced, and the damage of the vehicle S can be reduced. Further, the first arm 17 rotates, and the guardrail plate 2
1. Since the height of the pipe 31, the wire rope 41 is increased from the initial height H1 to the increased height H2 which is higher than the initial height H1, the collision vehicle S, its load, or the falling out of rockfalls are surely protruded. Can be prevented.

Further, by providing the guard rails 13 in a plurality of stages in the vertical direction of the column 12, the vehicle S, its load, or falling rocks can be more reliably received. That is, the vehicle body of the vehicle S can be received by the upper guardrail portion 13 and the wheels of the vehicle S can be received by the lower guardrail portion 13. This is particularly effective when a large vehicle S such as a truck collides.

FIG. 17 shows a protective fence 11 in which an impact detecting means (detecting means) 61 comprising a pressure sensor or the like is provided on a support column 12, and according to this protective fence 11, a vehicle S and a falling rock collide. When the first arm 17 and the second arm 18 rotate and the guardrail plate 21 hits the column 12 due to slippage or landslide, the impact is detected by the impact detection means 61 and a detection signal is output. It has become. That is, the impact detecting means 61 can be connected to a communication facility to transmit the information to a disaster management facility or to issue an alarm, whereby an occurrence of an accident or disaster can be quickly confirmed. In particular, accidents,
Not only in mountainous areas where it is difficult to find disasters, but also in road and railroad intersections, schools under cliffs, hospitals, etc.
It is possible to promptly check the occurrence of disasters and save lives quickly, and to prevent secondary disasters to minimize the risk of disasters.

[0044]

As described above, according to the protection fence of the present invention, the following effects can be obtained. According to the protective fence of the first aspect, when a vehicle or a rock falls, the impact force can be received by the impact receiving member. When the impact force is large, the small-diameter pin shears to absorb the impact, that is, when the impact from the impact receiving member is once received by the small-diameter pin, and then when the first arm is stopped by the stopper. , The impact can be absorbed step by step. In addition, when the rotation of the first arm is stopped by the stopper, the impact receiving member is disposed at the upper side, so that the colliding object such as the colliding vehicle, the load of the vehicle, or the falling rock is reliably prevented from jumping out. be able to. That is, it is possible to reliably prevent a vehicle from deviating from the road, falling down the road, or a vehicle-loaded object from jumping into the opposite lane or from falling rocks entering the road. In addition, asphalt pavement is raised on the roadway for road maintenance, or rocks and dirt spilled from the dump truck on curves and small landslides caused by the mountain surface are piled up on the road, and the height of the protective fence is increased. Even if the height decreases, the height increases upward at the time of a collision, so that the function as a protective fence can be reliably obtained.

According to the protective fence of claim 2, when a vehicle or a falling rock collides, the impact force is received by an impact receiving member formed of a guardrail plate.
When the impact force is large, the small-diameter pin shears and can absorb the impact in a stepwise manner. In addition, when the rotation of the first arm is stopped by the stopper, the impact receiving member is disposed at the upper side, so that it is possible to reliably prevent the colliding object such as the colliding vehicle, the load or the falling rock from jumping out. Further, when the first arm rotates upward, the first arm
The small-diameter pin shears at the connection point between the arm and the second arm, and the second arm rotates with respect to the first arm, so that the impact from the collision object can be absorbed in a stepwise manner. Moreover, the direction of the guardrail plate can always be maintained toward the collision object.

According to the third aspect of the present invention, when a vehicle, a falling rock, or the like collides, the impact force is received by the impact receiving member formed of a rod, and when the impact force is large, a pin having a small diameter is used. Can absorb the shock in a stepwise manner. In addition, when the rotation of the first arm is stopped by the stopper, the rod body is disposed upward, so that it is possible to reliably prevent the colliding object such as the colliding vehicle, the load or the falling rock from jumping out. Even if the collision point of the rod body moves upward, the rod body is held by the holding portion of the bracket so that it can rotate and move in the axial direction. As a result, a force such as a twist is not applied, and furthermore, the rod body is pulled and shifted to the collision location of the collision object, so that the impact at the time of collision of the collision object can be further absorbed.

According to the protection fence of the fourth aspect, the stopper is provided at the rear end of the first arm, that is, the stopper hits the column below the connecting portion of the first arm, and Since the rotation of one arm is stopped, the height of the column can be reduced. Thus, the protective fence can be a slender fence that does not protrude upward from the column, so that the appearance can be improved and the protective fence can have a good visibility.

According to the fifth aspect of the present invention, since the guardrails are provided on both sides of the pillar, the protective fence can be used as a median strip. Can be reliably prevented from deviating from the road, or falling rocks can be prevented from entering the road.

According to the sixth aspect of the present invention, since the guard rails are provided in a plurality of stages in the vertical direction of the pillar, the vehicle body of the vehicle is received by the upper guard rails, and the vehicle is provided by the lower guard rails. Can receive the wheel of. That is, when a large vehicle or the like collides, the vehicle can be reliably received. When used as a protective fence for receiving rockfall, a large rockfall can be received by the upper guardrail portion and a small rockfall can be received by the lower guardrail portion.

According to the protective fence of the present invention, when the first arm rotates due to a collision of a vehicle or a falling rock, a landslide, or the like, a detection signal is output from the detection means. By connecting to a communication facility, it is possible to transmit to a disaster management facility or to issue an alarm, whereby it is possible to quickly confirm the occurrence of an accident or disaster. Especially in mountainous areas where it is difficult to detect accidents and disasters, as well as at intersections between roads and railways, schools and cliffs under cliffs, the occurrence of accidents and disasters can be quickly confirmed to save lives quickly. It is possible to prevent secondary disasters and minimize disasters.

[Brief description of the drawings]

FIG. 1 is a side view of a column portion of a protective fence for explaining a configuration and a structure of a protective fence according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the protective fence for explaining the configuration and structure of the protective fence according to the embodiment of the present invention.

FIG. 3 is a side view of a pillar portion of the protection fence for explaining the movement of the protection fence according to the embodiment of the present invention.

FIG. 4 is a diagram illustrating a first embodiment of the protective fence according to the present invention.
It is a side view of the support | pillar part of the protective fence in which the arm was made into another shape.

FIG. 5 is a diagram illustrating a first embodiment of the protective fence according to the present invention.
It is a side view of the support | pillar part of the protective fence in which the arm was made into another shape.

FIG. 6 is a diagram illustrating a first configuration of the protection fence according to the embodiment of the present invention.
It is a side view of the support | pillar part of the protective fence in which the arm was made into another shape.

FIG. 7 is a diagram illustrating a first embodiment of the protective fence according to the present invention.
It is a side view of the support | pillar part of the protective fence in which the arm was made into another shape.

FIG. 8 is a side view of a pillar portion of the protective fence in which a pipe is used as an impact receiving member that constitutes the protective fence according to the embodiment of the present invention.

FIG. 9 is a side view of a pillar portion of the protection fence in which a pipe is used as an impact receiving member that constitutes the protection fence according to the embodiment of the present invention.

FIG. 10 is a front view of a collision point of the protective fence using a pipe as an impact receiving member constituting the protective fence according to the embodiment of the present invention.

FIG. 11 is a side view of a column portion of the protective fence in which a wire rope is used as an impact receiving member constituting the protective fence according to the embodiment of the present invention.

FIG. 12 is a side view of a pillar portion of the protective fence in which a wire rope is used as an impact receiving member constituting the protective fence according to the embodiment of the present invention.

FIG. 13 is a side view of a pillar portion of the protective fence in which a wire mesh is used together with a wire rope as an impact receiving member constituting the protective fence according to the embodiment of the present invention.

FIG. 14 is a side view of a pillar portion of the guard fence in which guard rails constituting the guard fence according to the embodiment of the present invention are provided in a plurality of upper and lower stages on both sides of the strut.

FIG. 15 is a perspective view of a guard fence in which guard rails constituting the guard fence according to the embodiment of the present invention are provided in a plurality of steps on both sides of a column and a pipe is used as an impact receiving member.

FIG. 16 is a side view of a pillar portion of the guard fence in which guard rails constituting the guard fence according to the embodiment of the present invention are provided on both sides of the pillar in a plurality of upper and lower stages and a pipe is used as an impact receiving member. .

FIG. 17 is a side view of a pillar portion of the protective fence in which the impact detecting means including the pressure sensor is provided on the protective fence according to the embodiment of the present invention.

FIG. 18 is a side view of a column portion of the protection fence for explaining the configuration and structure of the conventional protection fence.

FIG. 19 is a side view of a pillar portion of the protection fence for explaining an influence of a conventional protection fence caused by a vehicle collision.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Protective fence 12 Prop 13 Guard rail 15a Small bolt (small pin) 15b Large bolt (large pin) 17 First arm 18 Second arm 21 Guard rail plate 22a Small stud (small pin) 22b Large stud (large pin) ) 26 stopper 31 pipe (rod) 34 bracket 34a holding part 41 wire rope (rod) 43 hook (holding part) 45 wire mesh (shock receiving member) 46 bracket 46a holding part 51 large diameter pipe (holding part) 61 impact Detecting means (detecting means) R Ground S Vehicle

Claims (7)

[Claims] Claims: 1. A protective fence provided on a road or a bridge for receiving a collision object such as a vehicle or a falling rock, the support fence comprising: a support standing upright on a ground; and a guardrail portion supported by the support. The guardrail portion includes a first arm connected to the column by a pair of pins having different diameters so as to protrude to the side, and an impact receiving member supported by a distal end portion of the first arm to receive the collision object. And a stopper for stopping the rotation of the first arm by hitting the support post when the first arm rotates upward about the large diameter pin and the impact receiving member moves upward. The first arm is arranged such that a connection point by a large-diameter pin is located below a height position at which an impact force acts when the impact receiving member collides with the impact receiving member; The pin of small diameter is set A protective fence, characterized in that the protective fence is rotated upward about a connection point by the large-diameter pin when cut. 2. The impact receiving member comprises a plate-shaped guardrail plate supported via a second arm connected to the first arm by a pair of pins having different diameters. The protective fence according to 1. 3. The shock receiving member is inserted into the holding portion of a bracket having an annular holding portion provided at a distal end portion of the first arm, and is held so as to be rotatable and movable in the axial direction. 2. A rod body comprising:
Protective fence as described. 4. The first arm according to claim 1, wherein an intermediate portion of the first arm is connected to the support, and the stopper is provided at a rear end of the first arm. Or the protective fence according to item 1. 5. The protective fence according to claim 1, wherein the guard rails are provided on both sides of the support. 6. The system according to claim 1, wherein said guard rail portion is provided in a plurality of stages in a vertical direction of said column.
The protective fence according to any one of the above items 5. 7. The protection according to claim 1, further comprising detection means for detecting that the first arm has rotated, and outputting a detection signal. fence.