JP7471703B1 - Car stop pole device - Google Patents

Abstract

[Problem] To prevent a car stop pole from completely bending, breaking, or breaking when excessive force is applied to the car stop pole. [Solution] A reinforcement device 20 arranged inside a car stop pole 10 has a strong reinforcement portion 31 having both an outer cylindrical body 21 and an inner cylindrical body 22, and a weak reinforcement portion 32 consisting of only the outer cylindrical body 21. The ratio of the length L1 of the strong reinforcement portion 31 to the length L2 of the weak reinforcement portion 32 is 70:30 to 95:5. [Selected Figure] Figure 1

Description

This disclosure relates to a vehicle stop pole device that is installed on roads, sidewalks, parks, etc.

Traditionally, vehicle stop poles have been installed on roads, sidewalks, parks, etc. to prohibit vehicles from entering.

This type of vehicle stop pole has an elongated cylindrical body overall and is installed by embedding it in the ground.

Utility Model Registration No. 3215043

When a vehicle or the like collides with a car stop pole like the one described above, it is conceivable that the car stop pole will be subjected to a large impact. In such a case, it has been considered to insert a reinforcing device into the car stop pole in order to reinforce the car stop pole. However, when a vehicle or the like collides with the car stop pole, excessive force is concentrated on the car stop pole near the end of the reinforcing device, and the car stop pole may bend completely near the end of this reinforcing device, or may be damaged or broken.

The present disclosure has been made in consideration of these points, and aims to provide a car stop pole device that can effectively and easily reinforce a car stop pole embedded in the ground, and that can prevent the car stop pole from bending completely, breaking, or breaking even if excessive force is applied to the car stop pole.

The present disclosure relates to a vehicle stop pole device that includes a cylinder that is partially embedded in the ground, and an elongated reinforcing device provided within the cylinder of the vehicle stop pole, the reinforcing device having an outer cylinder and an inner cylinder attached within the outer cylinder, the reinforcing device having a strong reinforcing portion that includes both the outer cylinder and the inner cylinder, and a weak reinforcing portion that is located below the strong reinforcing portion and includes only one of the outer cylinder and the inner cylinder, and the ratio of the length of the strong reinforcing portion to the length of the weak reinforcing portion is 70:30 to 95:5.

The present disclosure relates to a vehicle stop pole device in which the outer cylinder has the same bending stiffness along the longitudinal direction, and the inner cylinder has the same bending stiffness along the longitudinal direction, so that the strong reinforcement portion has a greater bending stiffness than the weak reinforcement portion.

The present disclosure relates to a car stop pole device in which the reinforcement device is stored within the car stop pole over the entire longitudinal length, the upper end of the reinforcement device is located at the expected point of vehicle collision, and the lower end of the reinforcement device is located at the expected point of bending of the car stop pole in the event of a vehicle collision.

The present disclosure relates to a vehicle stop pole device in which the outer cylinder body and the inner cylinder body are both rectangular cylinder bodies.

As described above, according to the present disclosure, it is possible to reinforce the vehicle stop pole reliably and easily, and even if excessive force is applied to the vehicle stop pole, it is possible to prevent it from bending completely, being damaged, or breaking.

FIG. 1 is a side cross-sectional view showing a vehicle stop pole device according to a first embodiment. FIG. 2 is a perspective view showing the vehicle stop pole device according to the first embodiment. FIG. 3A is a side cross-sectional view showing a reinforcing device. FIG. 3B is a front view showing the reinforcing device. FIG. 4A is a perspective view showing a reinforcing device. FIG. 4B is a top view showing the reinforcing device with the cover removed for convenience. FIG. 5A is a side view showing an outer cylinder of the reinforcement device. FIG. 5B is a side cross-sectional view showing the inner cylinder of the reinforcement device. FIG. 6A is a diagram showing a method of installing a car stop pole device. FIG. 6B is a diagram showing a method of installing the car stop pole device. FIG. 6C is a diagram showing a method of installing the car stop pole device. FIG. 7 is a diagram showing the positional relationship between the car stop pole and the reinforcement device after a car collides with the car stop pole device. FIG. 8 is a diagram showing a modified example of the car stop pole device.

<Present embodiment>
Hereinafter, the present embodiment according to the present disclosure will be described with reference to the drawings.

Figures 1 to 7 show this embodiment according to the present disclosure.

As shown in Figures 1 to 7, the vehicle stop pole device 10A according to this embodiment includes a vehicle stop pole 10 that is embedded in the ground 1A and includes an elongated cylindrical body 11 having a lower end 11a and an upper end 11b, and an elongated reinforcing device 20 provided within the cylindrical body 11 of the vehicle stop pole 10.

Of these, the car stop pole 10 is made entirely of steel, and the reinforcing device 20 is also made entirely of steel. The car stop pole 10 includes a cylindrical body 11 that is embedded in the ground 1A, and in this embodiment, the ground 1A is made up of layers formed below the ground surface 1. In other words, the ground 1A is made up of the ground 2 arranged in sequence from the lower layer to the upper layer, the roadbed 3 on the ground 2, and the pavement 4 on the roadbed 3.

The top surface of the pavement 4 then becomes the ground surface 1, and the cylindrical body 11 of the car stop pole 10 is embedded in the ground 1A.

The lower end 11a of the cylindrical body 11 buried in the ground 1A is open, and the upper end 11b is sealed by a cap 11c.

3A to 5B, the elongated reinforcing device 20 provided inside the cylindrical body 11 will be described. The reinforcing device 20 has an outer cylindrical body 21 made of a square cylinder having four corners 21a and four faces 21b, and an inner cylindrical body 22 inserted into the outer cylindrical body 21 and made of a square cylinder having four corners 22a and four faces 22b. Each corner 22a of the inner cylindrical body 22 abuts against the corresponding face 21b of the outer cylindrical body 21 (see Figs. 3B and 4B).

In this embodiment, each corner 22a of the inner cylinder 22 abuts against the center 21c of the corresponding surface 21b of the outer cylinder 21, and is welded and fixed to the center 21c of this surface 21b.

Here, the central portion 21c of the corresponding surface 21b of the external cylinder 21 refers to the central portion of the surface 21b between the corners 21a of the external cylinder 21. Since each corner 22a of the internal cylinder 22 abuts against the central portion 21c of the corresponding surface 21b of the external cylinder 21, the external cylinder 21 made of a regular square cylinder and the internal cylinder 22 made of a regular square cylinder are arranged in a state where they are similar in shape but rotated by 45°.

In this way, the reinforcing device 20 is made up of an outer cylindrical body 21 and an inner cylindrical body 22 that are similar in shape and rotated by 45°, which gives the reinforcing device 20 itself great bending rigidity.

As described above, the reinforcing device 20 has an outer cylindrical body 21 and an inner cylindrical body 22 disposed within the outer cylindrical body 21, and includes a lower end 20a and an upper end 20b. The lower end 20a of the reinforcing device 20 is open, and the upper end of the reinforcing device 20 is sealed by a lid 23 (see FIG. 3A). The lower end 20a of the reinforcing device 20 is open, and is buried in the ground together with the cylindrical body 11 while taking in soil and sand inside.

As shown in FIG. 1, the reinforcing device 20 has a strong reinforcing portion 31 that includes both the outer cylinder 21 and the inner cylinder 22 formed along the longitudinal direction, and a weak reinforcing portion 32 that is located below the strong reinforcing portion 31 and includes only the outer cylinder 21.

In this embodiment, "above" and "below" refer to the "above" and "below" when the vehicle stop pole device 10A is installed underground 1A as shown in FIG. 1.

In addition, in this embodiment, the strong reinforcement portion 31 of the reinforcement device 20 includes both the outer cylinder 21 and the inner cylinder 22, and the weak reinforcement portion 32 includes only the outer cylinder 21, but this is not limited thereto, and the weak reinforcement portion 32 may include only the inner cylinder 22. In other words, the inner cylinder 22 may be extended downwardly relative to the outer cylinder 21, and the inner cylinder 22 may protrude downwardly from the outer cylinder 21.

In this embodiment, the ratio of the length L1 of the strong reinforcement portion 31 of the reinforcement device 20 to the length L2 of the weak reinforcement portion 32 is 70:30 to 95:5, and is preferably 85:15.

As described above, the strong reinforcement section 31 of the reinforcement device 20 has an outer cylinder 21 and an inner cylinder 22, and therefore includes an outer cylinder 21 made of a rectangular cylinder and an inner cylinder made of a rectangular cylinder, and has a relatively large bending rigidity as described below. In addition, the weak reinforcement section 32 is made only of the outer cylinder 21 made of a rectangular cylinder, and therefore has a relatively small bending rigidity as described below.

Here, the bending rigidity is determined by the second moment of area of the reinforcement device 20 multiplied by the Young's modulus of the material.

In this embodiment, the outer cylinder 21 of the reinforcement device 20 has the same cross section along the longitudinal direction, and therefore has the same bending stiffness along the longitudinal direction. Similarly, the inner cylinder 22 has the same cross section along the longitudinal direction, and therefore has the same bending stiffness along the longitudinal direction.

As a result, as described above, the strong reinforcement portion 31 of the reinforcement device 20 has a relatively large bending rigidity, and the weak reinforcement portion 32 has a relatively small bending rigidity.

The reinforcing device 20 is installed inside the car stop pole 10 to reinforce the car stop pole 10, and the strong reinforcing portion 31 of the reinforcing device 20 has a large bending rigidity to firmly reinforce the car stop pole 10. On the other hand, the weak reinforcing portion 32 has a small bending rigidity to flexibly reinforce the car stop pole 10.

In this embodiment, the ratio of the length L1 of the strong reinforcement portion 31 of the reinforcement device 20 to the length L2 of the weak reinforcement portion 32 is preferably 85:15 as described above, and specifically, the length L1 of the strong reinforcement portion 31 is 700 mm to 1000 mm, and the length L2 of the weak reinforcement portion 32 is 50 mm to 300 mm.

As shown in FIG. 1, in the car stop pole device 10A, if the length of the portion of the car stop pole 10 that protrudes upward from the ground surface 1 is L3 and the length of the portion of the car stop pole 10 that is embedded in the ground 1A is L4, then L3≦L4. Also, the reinforcing device 20 is stored within the car stop pole 10 over its entire length.

In addition, the soil of the ground 2 penetrates into the car stop pole 10 from the lower end 11a of the cylindrical body 11, and the reinforcement device 20 is supported by the soil of the ground 2 that penetrates into the car stop pole 10.

In this embodiment, FIG. 7 shows the predicted collision point 37 of the car stop pole 10, assuming that a vehicle or the like collides with the car stop pole device 10A. It is also assumed that when a vehicle or the like collides with the car stop pole device 10A, the car stop pole 10 will bend from the vicinity of the predicted bending point 35.

According to this embodiment, the reinforcing device 20 is inserted into the car stop pole 10 of the car stop pole device 10A, and the reinforcing device 20 is positioned so that its lower end 20a is located near the predicted bending point 35 of the car stop pole 10. At this time, the upper end 20b of the reinforcing device 20 is located near the predicted collision point 37 (see Figure 7).

In FIG. 7, the symbol 36 indicates the predicted ground surface line that corresponds to the ground surface 1 when the vehicle stop pole 10 is buried underground 1A.

Next, we will explain the operation of this embodiment with such a configuration. First, we will explain how to install the car stop pole device 10A with reference to Figures 6A to 6C.

First, as shown in FIG. 6A, the reinforcing device 20 is erected on the ground surface 1. At this time, the lower end 20a of the reinforcing device 20 is in contact with the ground surface 1.

Next, the car stop pole 10 is placed over the outside of the reinforcement device 20, and the car stop pole 10 is placed on the ground surface 1 via the lower end 11a of the cylinder 11. At this time, the cap 11c is removed from the upper end 11b of the cylinder 11.

Then, a pressing tool 40 is inserted into the car stop pole 10 via the upper end 11b of the cylinder 11. Then, a pressing device (not shown) applies pressure from above to the car stop pole 10 standing on the ground surface 1, driving the car stop pole 10 into the ground 1A. If it is difficult to drive the car stop pole 10 due to the condition of the pavement 4 and roadbed 3 that make up the ground surface 1, the pavement 4 and roadbed 3 may be removed and the car stop pole 10 driven into the ground 2.

When the car stop pole 10 is driven into the ground 1A by a pressing device (not shown), the car stop pole 10 descends into the ground 1A. At that time, soil and sand from the ground 1A enters the car stop pole 10 from the lower end 11a of the cylinder 11.

In this way, the soil and sand underground 1A enters the car stop pole 10 from the lower end 11a of the cylinder 11, causing the reinforcement device 20 to be blocked by the soil and rise relatively within the car stop pole 10 (see Figure 6B).

Then, the upper end 11b of the cylinder 11 and the upper surface of the pressing jig 40 come into contact with the pressing device (not shown), and the relative upward movement of the reinforcement device 20 within the car stop pole 10 stops. In this way, the upper end 11b of the cylinder 11 and the upper surface of the pressing jig 40 come into contact with the pressing device (not shown), and the height of the upper surface of the pressing jig 40 and the upper end 11b of the cylinder 11 become aligned, and the relative upward movement of the reinforcement device 20 within the car stop pole 10 stops, and the reinforcement device 20 is positioned along the longitudinal direction within the car stop pole 10.

Furthermore, by driving the car stop pole 10 and the reinforcing device 20 into the ground 1A via the pressing jig 40, the car stop pole 10 is positioned at a predetermined position in the ground 1A while the soil in the ground 1A flows into the reinforcing device 20 through the opening at the lower end 20a of the reinforcing device 20 (see Figure 6C).

Next, remove the pressing jig 40 from inside the car stop pole 10 and fit the cap 11c onto the upper end 11b of the cylindrical body 11 of the car stop pole 10.

In this way, a car stop pole device 10A having a car stop pole 10 and a reinforcing device 20 is obtained.

When a vehicle or the like collides with the vehicle stop pole device 10A during use, the vehicle or the like collides with the part of the vehicle stop pole 10 that protrudes upward near the predicted collision point 37 (see Figure 7).

As shown in FIG. 7, the collision of the vehicle or the like causes the vehicle stop pole 10 to bend in the vicinity of the predicted bending point 35 of the portion of the vehicle stop pole 10 that is embedded in the ground 1A.

In this embodiment, the upper end 20b of the reinforcing device 20 is located near the predicted collision point 37 of the car stop pole 10, and the lower end 20a of the reinforcing device 20 is located near the predicted bending point 35 of the car stop pole 10. Generally, the position of the predicted bending point 35 varies depending on the strength of the ground 1A, but in this embodiment, by providing the reinforcing device 20, the predicted bending point 35 can be brought near the lower end 20a of the reinforcing device 20.

As a result, when a vehicle or the like collides with the vehicle stop pole device 10A, the strong reinforcement portion 31 of the reinforcement device 20, which is positioned below the expected collision point 37 and has a large bending rigidity, can absorb the impact from the vehicle or the like.

When a vehicle or the like collides with the car stop pole device 10A, the car stop pole 10 bends from near the predicted bending point 35, but the weak reinforcement section 32 with low bending rigidity is located above the predicted bending point 35 where the car stop pole 10 bends. In other words, the portion above the predicted bending point 35 is where the car stop pole 10 starts to bend, and this portion of the car stop pole 10 can be flexibly reinforced by the weak reinforcement section 32 with low bending rigidity.

This allows the vehicle stop pole 10 to be gradually bent by the weak reinforcement portion 32 to a position above the expected bending point 35, specifically from the boundary 33 between the weak reinforcement portion 32 and the strong reinforcement portion 31 to the expected bending point 35.

As a result, in the event of a collision with a vehicle or the like, sudden force is not concentrated at the predicted bending point 35 of the car stop pole 10, so force is not concentrated on the car stop pole 10 and the car stop pole 10 does not break, and the reaction force from the car stop pole 10 does not cause a fatal impact to the vehicle or the like.

As described above, according to this embodiment, when a vehicle or the like collides with the car stop pole device 10A, the strong reinforcement portion 31 of the reinforcement device 20, which is located below the expected collision point 37 of the car stop pole 10, can absorb the impact from the vehicle or the like. In addition, the weak reinforcement portion 32, which is located above the expected bending point 35 of the car stop pole 10, can flexibly reinforce the car stop pole 10. Therefore, sudden force is not concentrated on the car stop pole 10 when a vehicle or the like collides, and the car stop pole 10 can be prevented from breaking near the expected bending point 35.

The ratio of the length L1 of the strong reinforcement portion 31 of the reinforcement device 20 to the length L2 of the weak reinforcement portion 32 is 70:30 to 95:5, preferably 85:15.

In other words, if the length L1 of the strong reinforcement portion 31 becomes shorter than the above values and the length L2 of the weak reinforcement portion 32 becomes longer, it will be difficult for the strong reinforcement portion 31 of the reinforcement device 20 to reliably reinforce the car stop pole 10 in the event of a vehicle or the like colliding with the car stop pole device 10A.

On the other hand, if the length L1 of the strong reinforcement portion 31 is longer than the above values and the length L2 of the weak reinforcement portion 32 is shorter than the above values, it will be difficult for the weak reinforcement portion 32 of the reinforcement device 20 to flexibly reinforce the car stop pole 10 in the event of a vehicle or the like colliding with the car stop pole device 10A.

In contrast, according to this embodiment, when a vehicle or the like collides with the vehicle stop pole device 10A, the strong reinforcement portion 31 of the reinforcement device 20 can reliably reinforce the vehicle stop pole 10, and the weak reinforcement portion 32 of the reinforcement device 20 can flexibly reinforce the vehicle stop pole 10.

<Modification>
Modifications of the present disclosure will now be described with reference to the drawings.

Figure 8 shows a modified example of this disclosure.

As shown in FIG. 8, the car stop pole device 10A includes a car stop pole 10 that is embedded in the ground 1A and includes an elongated cylindrical body 11 having a lower end 11a and an upper end 11b, and an elongated reinforcing device 20 provided within the cylindrical body 11 of the car stop pole 10.

The vehicle stop pole 10 includes a cylindrical body 11 that is embedded in the ground 1A, which is made up of layers formed below the ground surface 1. That is, the ground 1A is made up of the ground 2 arranged in sequence from the bottom to the top, the roadbed 3 on the ground 2, and the pavement 4 on the roadbed 3.

The top surface of the pavement 4 becomes the ground surface 1, and the cylindrical body 11 of the car stop pole 10 is embedded in the ground 1A. A part of the cylindrical body 11 embedded in the ground 1A is surrounded and reinforced by a mortar portion 5 filled in the ground 1A (see Figure 8). Note that concrete may be used instead of the mortar portion 5.

The lower end 11a of the cylindrical body 11 buried in the ground 1A is open, and the upper end 11b is sealed by a cap 11c.

As in the above-described embodiment, the reinforcing device 20 has an outer cylinder 21 made of a square cylinder having four corners 21a and four faces 21b, and an inner cylinder 22 made of a square cylinder having four corners 22a and four faces 22b, which is inserted into the outer cylinder 21. Each corner 22a of the inner cylinder 22 abuts against a corresponding face 21b of the outer cylinder 21 (see Figures 3A to 5B).

In this modified example, each corner 22a of the inner cylinder 22 abuts against the center 21c of the corresponding surface 21b of the outer cylinder 21, and is welded and fixed to the center 21c of this surface 21b.

Here, the central portion 21c of the corresponding surface 21b of the external cylinder 21 refers to the central portion of the surface 21b between the corners 21a of the external cylinder 21. Since each corner 22a of the internal cylinder 22 abuts against the central portion 21c of the corresponding surface 21b of the external cylinder 21, the external cylinder 21 made of a regular square cylinder and the internal cylinder 22 made of a regular square cylinder are arranged in a state where they are similar in shape but rotated by 45°.

In this way, the reinforcing device 20 is made up of an outer cylindrical body 21 and an inner cylindrical body 22 that are similar in shape and rotated by 45°, which gives the reinforcing device 20 itself great bending rigidity.

As described above, the reinforcing device 20 has an outer cylindrical body 21 and an inner cylindrical body 22 disposed within the outer cylindrical body 21, and includes a lower end 20a and an upper end 20b. The lower end 20a of the reinforcing device 20 is open, and the upper end of the reinforcing device 20 is sealed by a lid 23 (see FIG. 3A). The lower end 20a of the reinforcing device 20 is open, and is buried in the ground together with the cylindrical body 11 while taking in soil and sand inside.

The reinforcing device 20 also has a strong reinforcing section 31 having an outer cylindrical body 21 and an inner cylindrical body 22, and a weak reinforcing section 32 consisting of only the outer cylindrical body 21.

In this modified example, the support force of the car stop pole 10 of the car stop pole device 10A to the ground 1A is reinforced by the mortar portion 5, and if the length of the portion of the car stop pole 10 that protrudes upward from the ground surface 1 is L3 and the length of the portion of the car stop pole 10 that is embedded in the ground 1A is L4, L3 may be greater than or equal to L4. Also, the reinforcing device 20 is stored within the car stop pole 10 over its entire length.

The reinforcement device 20 is positioned so that its lower end 20a is near the predicted bending point 35 of the car stop pole 10. At this time, the upper end 20b of the reinforcement device 20 is near the predicted collision point 37.

In this modified example, the mortar portion 5 reinforces the support force of the car stop pole 10 in the ground 1A, and compared to the embodiment shown in Figures 1 to 7, the car stop pole 10 does not need to be buried deeper in the ground 1A, and the buried length of the car stop pole 10 in the ground 1A can be shortened. Therefore, even if there is an obstacle deep in the ground 1A, the car stop pole 10 can be reliably buried in the ground 1A.

The predicted collision point 37 of the vehicle stop pole 10 is at the same height as in the embodiment shown in Figures 1 to 7. In addition, the reinforcement device 20 has a strong reinforcement portion 31 and a weak reinforcement portion 32. In Figure 8, if the length of the strong reinforcement portion 31 is L1 and the length of the weak reinforcement portion 32 is L2,
L1:L2=70:30 to 95:5, preferably L1:L2=80:20.

The upper end 20b of the reinforcement device 20 is sealed by a lid 23.

Next, we will explain the operation of this embodiment with such a configuration. First, we will explain how to install the car stop pole device 10A with reference to Figure 8.

First, an opening 5A is formed in the ground 1A, which is made up of the ground 2, roadbed 3, and pavement 4, into which mortar is to be filled. Next, a reinforcing device 20 is erected in the opening 5A. At this time, the lower end 20a of the reinforcing device 20 is in contact with the bottom surface 5B of the opening 5A.

Next, the car stop pole 10 is placed over the outside of the reinforcement device 20, and the car stop pole 10 is placed on the bottom surface 5B of the opening 5A via the lower end 11a of the cylinder 11. At this time, the cap 11c is removed from the upper end 11b of the cylinder 11.

Then, a pressing tool 40 (see FIG. 6A) is inserted into the car stop pole 10 via the upper end 11b of the cylinder 11. Then, a pressing device (not shown) applies pressure from above to the car stop pole 10 standing on the bottom surface 5B of the opening 5A, driving the car stop pole 10 into the ground 1A.

When the car stop pole 10 is driven into the ground 1A by a pressing device (not shown), the car stop pole 10 descends into the ground 1A. Then, soil from the ground 2 enters the car stop pole 10 from the lower end 11a of the cylinder 11.

In this way, the soil of the ground 2 enters the car stop pole 10 from the lower end 11a of the cylinder 11, and the reinforcing device 20 is blocked by the soil of the ground 2 inside the car stop pole 10 and rises relatively inside the car stop pole 10.

Then, the upper end 11b of the cylinder 11 and the upper surface of the pressing jig 40 come into contact with the pressing device (not shown), and the relative upward movement of the reinforcement device 20 within the car stop pole 10 stops. In this way, the upper end 11b of the cylinder 11 and the upper surface of the pressing jig 40 come into contact with the pressing device (not shown), and the height of the upper surface of the pressing jig 40 and the upper end 11b of the cylinder 11 become aligned, and the relative upward movement of the reinforcement device 20 within the car stop pole 10 stops, and the reinforcement device 20 is positioned along the longitudinal direction within the car stop pole 10.

Furthermore, by driving the car stop pole 10 and the reinforcing device 20 into the ground 2 via the pressing jig 40, the car stop pole 10 is positioned at a predetermined position underground 1A while the soil of the ground 2 flows into the reinforcing device 20 through the opening at the lower end 20a of the reinforcing device 20 (see Figure 8).

Next, the pressing tool 40 is removed from inside the car stop pole 10, and the cap 11c is fitted onto the upper end 11b of the cylindrical body 11 of the car stop pole 10. Mortar is then filled into the opening 5A to form the mortar portion 5.

In this way, a car stop pole device 10A having a car stop pole 10 and a reinforcing device 20 is obtained.

When a vehicle or the like collides with the vehicle stop pole device 10A during use, the vehicle or the like collides with the part of the vehicle stop pole 10 that protrudes upward near the predicted collision point 37 (see Figure 8).

Furthermore, due to the collision of the vehicle or the like, the vehicle stop pole 10 bends in the vicinity of the predicted bending point 35 of the portion of the vehicle stop pole 10 that is embedded in the ground 1A.

In this modified example, the upper end 20b of the reinforcement device 20 is located near the predicted collision point 37 of the car stop pole 10, and the lower end 20a of the reinforcement device 20 is located near the predicted bending point 35 of the car stop pole 10.

As a result, when a vehicle or the like collides with the vehicle stop pole device 10A, the strong reinforcement portion 31 of the reinforcement device 20, which is positioned below the expected collision point 37 and has a large bending rigidity, can absorb the impact from the vehicle or the like.

When a vehicle or the like collides with the car stop pole device 10A, the car stop pole 10 bends from near the predicted bending point 35, but the weak reinforcement section 32 with low bending rigidity is located above the predicted bending point 35 where the car stop pole 10 bends. In other words, the portion above the predicted bending point 35 is where the car stop pole 10 starts to bend, and this portion of the car stop pole 10 can be flexibly reinforced by the weak reinforcement section 32 with low bending rigidity.

This allows the vehicle stop pole 10 to be gradually bent by the weak reinforcement portion 32 to a position above the expected bending point 35, specifically from the boundary 33 between the weak reinforcement portion 32 and the strong reinforcement portion 31 to the expected bending point 35 (see Figure 8).

As a result, in the event of a collision with a vehicle or the like, sudden force is not concentrated at the predicted bending point 35 of the car stop pole 10, so force is not concentrated on the car stop pole 10 and the car stop pole 10 does not break, and the reaction force from the car stop pole 10 does not cause a fatal impact to the vehicle or the like.

As described above, according to this modified example, when a vehicle or the like collides with the car stop pole device 10A, the strong reinforcement portion 31 of the reinforcement device 20, which is located below the expected collision point 37 of the car stop pole 10, can absorb the impact from the vehicle or the like. In addition, the weak reinforcement portion 32, which is located above the expected bending point 35 of the car stop pole 10, can flexibly reinforce the car stop pole 10. Therefore, sudden force is not concentrated on the car stop pole 10 when a vehicle or the like collides, and it is possible to prevent the car stop pole 10 from breaking near the expected bending point 35.

The ratio of the length L1 of the strong reinforcement portion 31 of the reinforcement device 20 to the length L2 of the weak reinforcement portion 32 is 70:30 to 95:5, preferably 80:20.

In other words, if the length L1 of the strong reinforcement portion 31 becomes shorter than the above values and the length L2 of the weak reinforcement portion 32 becomes longer, it will be difficult for the strong reinforcement portion 31 of the reinforcement device 20 to reliably reinforce the car stop pole 10 in the event of a vehicle or the like colliding with the car stop pole device 10A.

On the other hand, if the length L1 of the strong reinforcement portion 31 is longer than the above values and the length L2 of the weak reinforcement portion 32 is shorter than the above values, it will be difficult for the weak reinforcement portion 32 of the reinforcement device 20 to flexibly reinforce the car stop pole 10 in the event of a vehicle or the like colliding with the car stop pole device 10A.

In contrast, according to this modified example, if a vehicle or the like collides with the vehicle stop pole device 10A, the strong reinforcement portion 31 of the reinforcement device 20 can reliably reinforce the vehicle stop pole 10, and the weak reinforcement portion 32 of the reinforcement device 20 can flexibly reinforce the vehicle stop pole 10.

In the above embodiment and modified example, the outer cylinder 21 and the inner cylinder 22 of the reinforcing device 20 each have the same cross section over their entire length, but the outer cylinder 21 and the inner cylinder 22 may each have a different cross section over their entire length. In addition, the example in which the car stop pole 10 is made of a cylindrical body 11 has been shown, but this is not limited to this, and the car stop pole 10 may be made of a cylinder, for example a rectangular cylinder. In addition, only one car stop pole device 10A may be installed in the ground 1A, or two, three, or more car stop pole devices 10A may be buried in the ground 1A, and in this case, adjacent car stop pole devices 10A may be connected to each other with a connecting member (not shown).

1 Ground surface 1A Underground 2 Ground 3 Roadbed 4 Pavement 5 Mortar portion 10 Car stop pole 10A Car stop pole device 11 Cylinder 11a Lower end 11b Upper end 11c Cap 20 Reinforcement device 20a Lower end 20b Upper end 21 Outer cylinder 21a Corner 21b Surface 21c Center 22 Inner cylinder 22a Corner 22b Surface 23 Lid 31 Strong reinforcement portion 32 Weak reinforcement portion 33 Boundary 35 Predicted bending point 36 Predicted ground surface line 37 Predicted collision point 40 Pressing jig

Claims (4)

A vehicle stop pole including a cylindrical body partially embedded in the ground;
and an elongated reinforcing device provided within the cylindrical body of the vehicle stop pole,
The reinforcing device includes an outer cylindrical body and an inner cylindrical body mounted within the outer cylindrical body,
the reinforcing device has a strong reinforcing portion including both the external cylindrical body and the internal cylindrical body, and a weak reinforcing portion located below the strong reinforcing portion and including only one of the external cylindrical body and the internal cylindrical body,
This vehicle stop pole device has a ratio of the length of the strong reinforcement portion to the length of the weak reinforcement portion of 70:30 to 95:5. The vehicle stop pole device according to claim 1, wherein the outer cylinder has the same bending stiffness along the longitudinal direction, and the inner cylinder has the same bending stiffness along the longitudinal direction, so that the strong reinforcement portion has a greater bending stiffness than the weak reinforcement portion. The reinforcing device is housed within the vehicle stop pole over the entire length in the longitudinal direction,
The upper end of the reinforcement device is located at a predicted collision point of the vehicle,
3. The vehicle stop pole device according to claim 1, wherein a lower end of the reinforcing device is located at a point where the vehicle stop pole is expected to bend in the event of a vehicle collision. The vehicle stop pole device according to claim 1 or 2, wherein the outer cylinder and the inner cylinder are both rectangular cylinders.