JP7480022B2 - Vehicle capture device, cover member, and vehicle capture method - Google Patents

Description

The present invention relates to a vehicle capture device for capturing a vehicle, a cover member used therein, and a vehicle capture method.

For the safety of pedestrians, traffic safety facilities such as guardrails are installed along sidewalks. However, in places where pedestrians need to pass, such as intersections (near the junction of a crosswalk and a sidewalk), protective facilities that block passage, such as guardrails, cannot be installed, and so there are cases where traffic safety facilities are not installed.
There have been tragic accidents at intersections where a vehicle turning right has collided with a vehicle going straight, causing the vehicle to veer off course and crash into the sidewalk near the intersection. This has made it urgent to install traffic safety facilities at intersections.
As mentioned above, near the junction of a crosswalk and a sidewalk, it is common to install bollards because it is not possible to install protective facilities such as guardrails that would block passage. Patent Document 1 discloses technology related to such bollards.

Patent No. 5959964

Bollards have a variety of purposes, but in the case of bollards intended to prevent vehicles from crashing into them, they need to be strong enough to stop or reduce the speed of the vehicle in the event of a collision.
Such bollards require not only the strength of the bollard itself, but also construction to support the bollard with the necessary strength. Under the road surface (asphalt, etc.) of roads and sidewalks is usually soil. In order to give the bollard the necessary strength in the ground, it is necessary to cast the bollard to a certain depth. For example, a depth of 1500 mm is required. However, roads and sidewalks may contain a complex number of buried objects, such as water pipes, gas pipes, electric wires, communication cables, and other cables, making it difficult to cast the bollard deep.
One solution to this problem is to build a concrete foundation or other foundations to give the bollard strength at a shallow depth. However, this requires time and money to pour and cure the concrete, and there is a risk that this will not be able to meet the urgent need to install traffic safety facilities at intersections (where a large number of installations are required).

In view of the above, the present invention aims to provide a vehicle capture device for capturing vehicles that can be installed even when buried objects are present at a certain depth underground.

(Configuration 1)
A vehicle capture device is characterized in that it comprises a wheel derailment space for allowing a vehicle to derail, and a covering member for covering the wheel derailment space and dropping the wheels into the wheel derailment space when the vehicle enters.

(Configuration 2)
2. The vehicle capture device according to claim 1, wherein the cover member is configured to drop into the wheel derailment space when a load exceeding a predetermined weight is applied thereto.

(Configuration 3)
The vehicle capture device described in configuration 2 is configured so that when a load exceeding a predetermined weight is applied, the covering member or the support part supporting it will be damaged, causing the covering member to fall into the wheel-release space.

(Configuration 4)
4. The vehicle capture device according to claim 3, wherein a weak portion that causes stress concentration is formed in the cover member or the support portion.

(Configuration 5)
A vehicle capture device as described in any one of configurations 1 to 4, characterized in that it has a collision-receiving member that is configured to come into contact with the vehicle when the vehicle enters, and to drop the covering member into the wheel-release space upon contact with the vehicle.

(Configuration 6)
6. A vehicle capture device as described in configuration 5, characterized in that the covering member or a support portion supporting the covering member is damaged by a load generated by the collision-receiving member coming into contact with a vehicle.

(Configuration 7)
7. The vehicle capture device according to claim 6, wherein the collision target member is a support column fixed to the cover member.

(Configuration 8)
A vehicle capture device as described in any one of configurations 1 to 7, characterized in that the wheel derailment space is filled with a filler.

(Configuration 9)
A vehicle capture device as described in any one of configurations 1 to 8, characterized in that the depth of the wheel-free space is 50 cm or less.

(Configuration 10)
A cover member for use in the vehicle capture device according to any one of configurations 1 to 9.

(Configuration 11)
A cover member to which the support pillar is fixed, used in the vehicle capture device according to configuration 7.

(Configuration 12)
A vehicle capture method for capturing an entering vehicle, comprising the steps of: providing a wheel derailment space for the vehicle to derail; and a covering member for covering said wheel derailment space; and when the vehicle enters, dropping the covering member into said wheel derailment space, thereby causing the wheels to drop into said wheel derailment space.

The present invention provides a vehicle capture device for capturing vehicles that can be installed even when buried objects are present at a certain depth underground.

FIG. 1 is a diagram showing a vehicle capture device according to a first embodiment of the present invention; FIG. 1 shows another example of a cover member and a support column. FIG. 13 shows a vehicle capture device according to a second embodiment. FIG. 13 is a diagram for explaining the function of a vehicle capture device according to a second embodiment. FIG. 13 shows a vehicle capture device according to a third embodiment. FIG. 11 is a diagram for explaining the function of a vehicle capture device according to a third embodiment. FIG. 13 shows a vehicle capture device according to a fourth embodiment. FIG. 1 shows another example of a vehicle capture device. A diagram showing an example of a rockfall capture device.

The following describes an embodiment of the present invention in detail with reference to the drawings. Note that the following embodiment is one form for realizing the present invention, and does not limit the scope of the present invention.

<Embodiment 1>
FIG. 1 is a diagram showing a vehicle capture device according to a first embodiment of the present invention.
The vehicle capture device 1 is installed near the junction of a crosswalk and a sidewalk at an intersection, i.e., at a location where pedestrians need to pass onto the roadway, and is a device for capturing a vehicle (stopping the vehicle or attenuating the vehicle's energy) when the vehicle is about to enter (or invade) the sidewalk. In FIG. 1, the left side of the figure is the sidewalk side, and the right side is the roadway side. The device prevents a vehicle from entering the sidewalk side from the roadway side, and hereinafter, the direction from the roadway side to the sidewalk side (the direction from right to left in FIG. 1) is referred to as the vehicle entry direction, and the direction along the sidewalk or roadway is referred to as the traveling direction. Note that the traveling direction is "the direction along the sidewalk or roadway" and is not necessarily a straight line.

As shown in FIG. 1, the vehicle capture device 1 includes:
A derailing space 12 for derailing the vehicle C;
The vehicle is provided with a cover member 11 which covers the wheel-off space 12 and drops the wheels into the wheel-off space 12 when the vehicle C enters.
In addition, it is a struck member that is arranged to come into contact with vehicle C when vehicle C enters, and is configured to drop the covering member 11 into the wheel-off space 12 upon contact with vehicle C, and is equipped with a support pillar (struck member) 13 that damages the covering member 11 due to the load generated by contact with vehicle C.

The wheel derailment space 12 is formed to be at least large enough for the wheels to derail. In this embodiment, the wheel derailment space 12 has a width (in the direction of vehicle entry) of 1 m and a depth of 50 cm, and is provided within a necessary range along the direction of travel.
Buried objects such as water pipes, gas pipes, electric wires, communication cables, and other cables near roads are usually buried deeper than 50 cm, so by setting the depth of the wheel-derailing space to 50 cm or less, the risk of damaging buried objects when installing the vehicle capture device 1 can be reduced.

The cover member 11 is a member that covers the upper part of the wheel-off space 12 so that it is almost flush with the road surface RS, and is formed and installed with a load-bearing capacity that will not allow people, bicycles, various vehicles, etc. to fall off simply by standing on it.
A support pillar (collision target member) 13 is fixed to the cover member 11, and the cover member 11 is constructed so that when the support pillar 13 is knocked down, the cover member 11 is destroyed. A plurality of support pillars 13 are installed in a line at intervals of 1 m along the direction of travel (in the depth direction of the paper in FIG. 1 ). The support pillars may be arranged at intervals that do not impede the passage of pedestrians, etc., but do not allow vehicles to pass through.

FIG. 1A is a schematic diagram showing a state before a vehicle C enters, and FIG. 1B is a schematic diagram showing a state in which the vehicle capturing device 1 has captured the entering vehicle C.
The pillars 13 are fixed to the cover member 11 at a distance that prevents a vehicle from passing through, so that a vehicle will inevitably come into contact with the pillars 13 when it enters.
The support pillar 13 is fixed to the covering member 11, and is configured so that the covering member 11 is destroyed when the support pillar 13 falls, so that when the vehicle C hits the support pillar 13, the support pillar 13 falls, the covering member 11 is damaged, and the vehicle C falls into the wheel-free space 12. As a result, as shown in Fig. 1(b), the vehicle C derails and is captured by the vehicle capture device 1 (the vehicle is stopped or the vehicle energy is reduced).

As described above, the vehicle capture device 1 of this embodiment can be installed without affecting buried objects such as water pipes, gas pipes, electric wires, and communication cables even when these objects are buried underground. Furthermore, the vehicle capture device 1 can be installed at a relatively low cost and in a short construction period, which can address the issue of "urgent need to install traffic safety facilities at intersections (where a large number of installation targets exist)."

In this example, the pillars (collision target members) are arranged in a single row, but the present invention is not limited to this, and the pillars may be arranged in two or more rows, or in a staggered arrangement.
In addition, although the example shows the support pillars being arranged only on the upper side of the cover member, the present invention is not limited to this, and the support pillars may be arranged to penetrate the cover member.
In order to ensure that the covering member falls (breaks) when the vehicle hits the support pillar, the covering member may be formed with a weak portion that generates stress concentration. An example of such a weak portion is shown in Fig. 2. The covering member 11A in Fig. 2 has a recess 111 formed as a weak portion on its back side. As in the example in Fig. 2, it is preferable to form the weak portion near the connection portion with the support pillar.
The weak portion can be formed in any manner, including a method of providing a geometrically weak portion such as by providing a portion where the thickness is thin as in the example of Figure 2 or by forming intermittent holes in the covering member (such as a cut line), or a method of providing a materially weak portion such as by using a brittle material in part of the covering member.

<Embodiment 2>
FIG. 3 is a diagram showing a vehicle capture device of the second embodiment, and FIG. 4 is a diagram explaining the functions of a cover member and the like of the vehicle capture device.
The vehicle capture device 1B of this embodiment has a wheel derailment space 12B and a cover member 11B that covers the wheel derailment space 12B, similar to the first embodiment. The wheel derailment space 12B is similar to the first embodiment, so a description thereof will be omitted here.

FIG. 3(a) is a top view of the vehicle capturing device 1B, and FIG. 3(b) and FIG. 3(c) are cross-sectional views taken along lines AA and BB in FIG. 3(a), respectively.
The cover member 11B of this embodiment has a square shape of 1 m x 1 m when viewed from above, and is provided continuously when installed. That is, it is provided in a line in the vertical direction of Fig. 3 (a). By providing the cover members 11B in a line, the support columns 13B are provided at intervals of 1 m.
The cover member 11B is made up of two plate members, which are connected by a shaft 112 that runs along the direction of travel (a tangent thereto) at approximately the center in the direction in which the vehicle enters.
The two plate members constituting the cover member 11B have a notch 115 on the upper surface side where the two plates face each other (see FIG. 3(c)). The notch 115 is formed on the upper part of the shaft 112 along the shaft 112.
The cover member 11B has a hinge structure at the axis 112 and can be bent downward.
In addition, the covering member 11B is a member that covers the upper part of the wheel-off space 12B so that it is approximately flush with the road surface RS, and is formed and installed with a load-bearing capacity that will not cause people, bicycles, various vehicles, etc. to fall off simply by standing on it, as in embodiment 1.

The support pillar 13B has an L-shape when viewed from the side, and the support portion 13B1, which is the bottom portion of the L-shape, is formed so that its dimension in the vehicle entry direction fits into the cutout portion 115 of the covering member 11B, as can be seen in Figure 3 (b).
The tip side of the support portion 13B1 is axially supported by a shaft 113 on the cover member 11B, whereby the support column 13B is attached rotatably relative to the cover member 11B.
The cutout portions 115 other than the portion where the support pillar 13B is provided are provided with lids 114 for covering the cutout portions 115. The lids 114 are formed, for example, from resin, and are constructed to have a strength sufficient to not be damaged even if a person stands on the top of the lids.

FIG. 4 is a diagram for explaining the function of the vehicle capture device 1B of this embodiment.
As described above, the covering member 11B has a hinge structure at the shaft 112 and is a bendable member, but the covering member 11B does not bend downward in the state shown in Fig. 4(a) because the support portion 13B1 of the support pillar 13B fits into the notch portion 115. In other words, the support portion 13B1 is a support portion that supports the covering member 11B so that it does not bend (i.e. does not fall).
When an approaching vehicle comes into contact with the support pillar 13B, as shown in Fig. 4(b), the support pillar 13B is knocked down, and the support portion 13B1 comes out of the notch portion 115. This causes the cover member 11B to bend and fall into the wheel-drop space (Fig. 4(c)). At this time, the cover 114 is damaged (or comes off), so it does not hinder the bending of the cover member 11B.
This causes the vehicle to derail and be captured by the vehicle capture device 1B (the vehicle is stopped or the vehicle energy is reduced).

As described above, the vehicle capture device 1B of this embodiment can provide the same effects as those of the first embodiment. Furthermore, since the vehicle capture device 1B is not designed to be damaged, it can be reused. The support pillar 13B can also be reused if it is not damaged, and by making the support pillar 13B part replaceable, if the support pillar 13B is damaged, only this part can be replaced, which can reduce maintenance costs.

<Embodiment 3>
FIG. 5 is a diagram showing a vehicle capture device according to the third embodiment, and FIG. 6 is a diagram explaining the functions of a cover member and the like of the vehicle capture device.
5(a) is a top view of the vehicle capturing device 1C, and FIG. 5(b) and FIG. 5(c) are cross-sectional views taken along lines AA and BB in FIG. 5(a), respectively.
The cover member 11C of this embodiment is a plate-like member having a square shape of 1 m x 1 m when viewed from above, and is provided continuously when installed. That is, it is provided side by side in the vertical direction of Figure 5 (a).
As shown in Fig. 5(c), the lower part of the covering member 11C is supported on one side facing the roadway (right side of the figure), and is not supported on the other side facing the sidewalk (left side of the figure). Also, as shown in Fig. 5(a) to Fig. 5(c), the lower part is supported at approximately the center in the traveling direction by a beam member 14 extending in the vehicle entry direction.
In addition, the covering member 11C is a member that covers the upper part of the wheel-off space 12C so that it is approximately flush with the road surface RS, and is formed and installed with a load-bearing capacity that will not cause people, bicycles, various vehicles, etc. to fall off simply by standing on it, as in embodiment 1.

The support pillar 13C is provided closer to the roadway than the cover member 11C and is installed rotatably by the shaft portion 13C1. Note that it is not necessarily required to support the support pillar by a shaft, and it is sufficient that the lower end of the support pillar swings toward the roadway side to slide the beam member 14 when the support pillar 13C is knocked down by contact with a vehicle.
The lower end of the support 13C is connected to the beam member 14 by a connecting member 15.
As in the second embodiment, the cover members 11C are arranged side by side, so that the support posts 13C are arranged at intervals of 1 m.

The beam member 14 is supported at its lower end at both ends and is installed so as to be slidable in the vehicle entry direction. Note that a member for smoothing the sliding in the vehicle entry direction may be provided. For example, wheels or rollers may be provided between the cover member 11C and the beam member 14, or between the beam member 14 and the supports supporting both ends of the beam member 14.
The beam member 14 is formed to have a strength sufficient to support the cover member 11C and a vehicle or the like placed thereon.
As for the wheel-free space 12C, the concept is the same as in the first embodiment, so the explanation will be omitted here.

FIG. 6 is a diagram for explaining the function of the vehicle capture device 1C of this embodiment.
6A, the lower end of the covering member 11C is supported by the beam member 14. That is, the beam member 14 is a support portion that supports the covering member 11C so as not to fall.
When an approaching vehicle comes into contact with the support pillar 13C, as shown in Fig. 6(b), the support pillar 13C is knocked down, and the beam member 14 is pulled and slid, so that one end (side of the sidewalk) is not supported. As a result, the beam member 14 and the cover member 11C fall into the wheel-release space 12C (Fig. 6(c)).
This causes the vehicle to derail and be captured by the vehicle capture device 1C (the vehicle is stopped or the vehicle energy is reduced).

As described above, the vehicle capture device 1C of this embodiment can achieve the same effects as those of the first and second embodiments.

<Embodiment 4>
FIG. 7 is a diagram showing a vehicle capture device according to the fourth embodiment.
The vehicle capture device 1D of this embodiment, like embodiment 1, has a wheel derailment space 12D and a covering member 11D that covers it, but no support pillars are provided to damage the covering member 11D.
The cover member 11D is configured so that when a load exceeding a predetermined weight is applied, the cover member 11D falls into the wheel derailment space 12D. In this embodiment, the cover member 11D is configured so that when a load of 300 kg/ ^m2 or more is applied, the cover member 11D breaks. In other words, when a load exceeding the predetermined weight is applied, the cover member breaks and falls into the wheel derailment space.
As for the wheel-free space 12D, the concept is the same as in the first embodiment, and therefore the explanation thereof will be omitted here.

7(a) and (b), when a vehicle C enters the vehicle capture device 1D, a load of 300 kg/ ^m2 or more is applied to the cover member 11D, causing the cover member 11D to break. This causes the vehicle to derail and be captured by the vehicle capture device 1D (the vehicle is stopped or the vehicle energy is reduced).

In the first and fourth embodiments, the covering member is broken as an example, however, it is also possible to configure the supporting portion that supports the covering member to be broken or the support to be removed, instead of the covering member.
For example, the support parts 14E and 14F for supporting the covering member as illustrated in Figures 8(a) and (b) may be configured to break when a load exceeding a predetermined weight is applied thereto, or the support parts 14E and 14F may be configured to break or become unsupported by utilizing the load generated when the support pillar is knocked over.

In each embodiment, a support pillar is used as an example of the impacted member, but the impacted member is not limited to a support pillar. The impacted member may be anything that comes into contact with an approaching vehicle and is configured to cause the covering member to fall into the wheel-drop space by the energy generated by the contact. However, a support pillar (rod-shaped member) is preferable in order not to impede the passage of pedestrians, etc.

The wheel derailment space may be filled with a buffer material, for example, sand, which can further attenuate the vehicle energy of the trapped vehicle and reduce the impact on the vehicle.
In addition, if the covering member remains in a plate shape as in the second and third embodiments, it is difficult for the vehicle to come into contact with the filling material, so it is easier to obtain the effect of filling the filling material if the covering member breaks as in the first and fourth embodiments. From the same viewpoint, it is more preferable that the covering member is a material (e.g., reinforced glass) that shatters when broken.

In each embodiment, the width of the wheel-off space (in the direction of vehicle entry) is 1 m, but the present invention is not limited to this, and may be appropriately determined based on the required specifications. For example, the width of the wheel-off space required to attenuate the vehicle energy to a predetermined value is determined based on conditions such as what vehicle (vehicle weight, wheel size, etc.) is targeted and what speed range the traffic safety facility is targeted for, taking into account the filling material in the wheel-off space, etc. It is preferable that the width of the wheel-off space is larger than the diameter of the wheel of the assumed vehicle. More specifically, it is preferable that the width of the wheel-off space is larger than the length of the wheel (L in FIG. 7) along the direction of travel of the vehicle at the height of the minimum ground clearance (the vertical distance from the horizontal ground surface to the lowest point of the vehicle) (except when the height of the center of the wheel is lower than the minimum ground clearance).
In addition, in each embodiment, the depth of the wheel derailment space is 50 cm, but the present invention is not limited to this. If the depth of the buried object is known, the wheel derailment space can be formed at any depth shallower than that depth, and in a location where it is known that there is no buried object, the depth of the wheel derailment space can be any depth. It is preferable that the depth of the wheel derailment space is deeper than the minimum ground clearance of the assumed vehicle.
In addition, in each embodiment, the interval between the pillars is 1 m, but the present invention is not limited to this. The interval between the pillars may be any interval that does not allow vehicles to pass through.

Although the above has been described as a device for capturing vehicles, the capture device of the present invention can also be used to capture moving objects other than vehicles, such as a capture device for capturing an entering moving object.
FIG. 9 shows an example of such a device, which is used to capture falling rocks.
In the example of FIG. 9, a rockfall protection fence F for preventing damage caused by falling rocks from a slope is provided between the slope and a capture device 2.
The capture device 2, like the first embodiment, has a capture space 22 and a cover member 21 that covers the capture space 22, and the capture space 22 is filled with sand as a cushioning material.
When a falling rock hits the cover member 21, it plunges together with the cover member 21 into the sand in the capture space 22.
In the past, there have been examples of forming a layer of sand between the rockfall protection fence F and the slope, but if the rockfall is simply received by a layer of sand, the range of energy propagation in the sand layer is very limited. In other words, the energy is absorbed only in the vicinity of the point where the rockfall hits, so the buffering effect of the sand is not very large.
In contrast, in the capture device 2, the falling rock penetrates into the sand together with the cover member 21, so that the energy is transmitted to the sand over a wider area, and a higher cushioning effect can be obtained. From this point of view, it is preferable that the cover member is not a material that can be crushed.

1. Vehicle capture device 11. Cover member 111. Weak portion.
12. Space for wheel removal 13. Support (collision target)
14E, 14F... Support part C... Vehicle

Claims (7)

1. An apparatus for capturing a vehicle, comprising:
A space for vehicles to derail,
A cover member that covers the wheel derailment space and drops the wheels into the wheel derailment space when the vehicle enters the space;
A collision receiving member that is provided to come into contact with the vehicle when the vehicle enters the collision receiving member and that is configured to drop the cover member into the wheel-removal space when the cover member comes into contact with the vehicle;
A vehicle capture device comprising: 2. The vehicle capture device according to claim 1 , wherein the covering member or a support portion supporting the covering member is damaged by a load generated by the collision-receiving member coming into contact with a vehicle. 3. The vehicle capture device according to claim 2 , wherein the collision target member is a support column fixed to the cover member. 4. A vehicle capture device according to claim 1, wherein the space for trapping the wheel is filled with a filler. 5. A vehicle capture device according to claim 1, wherein the depth of the space for preventing the wheel from coming off is 50 cm or less. A cover member to which the support pillar is fixed, which is used in the vehicle capture device according to claim 3 . A vehicle capture method for capturing an approaching vehicle, comprising:
a wheel-off space for allowing a vehicle to derail, a cover member covering said wheel-off space , and a collision-receiving member arranged to come into contact with the vehicle when the vehicle enters the space and to drop the cover member into the wheel-off space upon contact with the vehicle;
A vehicle capture method characterized by the fact that when a vehicle enters, the collision-target member comes into contact with the vehicle, causing the covering member to drop into the wheel-fall space, thereby causing the wheels to drop into the wheel-fall space.

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