JPH0522617U - Guardrail - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a guardrail capable of preventing a vehicle from being scratched or jumping out to the opposite lane by reducing a frictional force when the vehicle comes into contact with the vehicle. [Structure] A guardrail 1 comprising: a pillar 3 standing upright along a road at appropriate intervals; and a ring-shaped cushioning member 4 supported by the pillar 3 and freely rotating.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a guardrail.

[0002]

[Prior Art]

 A conventional guardrail is shown in FIGS. 7 (a) and 7 (b). As shown in the figure, these guard rails a and b are mounted on rods, wire materials d, plate materials e, etc., via brackets f, to pillars c erected at appropriate intervals along the road. It is configured. Such guardrails a and b are provided so as to partition the roadway from the sidewalk or to partition the centerline of the roadway. It also prevents vehicles from accidentally entering the sidewalk or jumping into the opposite lane.

[0003]

[Problems to be solved by the device]

 The guard rails a and b have a structure in which the rod material, the wire material d, the plate material e, etc. are fixed to the column c. Therefore, when the vehicle comes into contact with these guardrails a and b, a frictional force is exerted between the vehicle, which is the contact portion, and rod materials, plate materials and the like, and the vehicle is scratched.

Further, as shown in FIG. 8, in the guard rail g that divides a center line such as an expressway, when the vehicle V contacts the guard rail g, the above-mentioned large frictional force F acts on the contact portion h. , The yaw moment M in the direction in which the vehicle V bites into the guardrail g is generated. As a result, the vehicle V may break through (or get over) the guardrail g and jump into the opposite lane i, resulting in a serious accident.

The object of the present invention, which was devised in consideration of the above circumstances, is to reduce the frictional force when a vehicle comes into contact with it, so that the vehicle can be prevented from being scratched or jumping out into the opposite lane. To provide.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is composed of columns that are erected at appropriate intervals along a road, and a ring-shaped cushion material that is supported by these columns and that freely rotates.

[0007]

[Action]

 When the vehicle comes into contact with the guard rail having the above-described structure, the vehicle comes into contact with the ring-shaped cushion material supported by the column, and the cushion material rotates. The rotation of the cushion material reduces the frictional force at the contact portion between the vehicle and the guardrail. In this way, the frictional force at the contact portion is reduced, so that the vehicle is prevented from being caught in the guardrail. Further, when the vehicle comes into contact, the cushion material is appropriately deformed, so that the vehicle is prevented from being scratched.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 shows a perspective view of the guardrail 1 and the vehicle 2. As shown in the figure, the guard rail 1 is provided with struts 3 that are erected at appropriate intervals along the road so as to partition the roadway from the sidewalk or the centerline of the roadway, and are rotated by being inserted into these stanchions 3. It is composed of a supported ring-shaped cushion member 4. In order to prevent the vehicle 2 from passing through, the upright intervals of the columns 3 are at least narrower than the entire width of the vehicle 2.

FIG. 1 shows a side cross-sectional view of a single guardrail product 5 including the pillar 3 and the cushion member 4. As shown in the figure, the pillar 3 is made of a pipe material (made of stainless steel), and a flange 6 for supporting the cushion material 4 is formed in the middle portion thereof. The cushion member 4 supported by the flange 6 is formed by stacking four ring bodies 4a, 4b, 4c, 4d. These ring bodies 4a to 4d are made of a soft material such as rubber, plastic, PVC (soft vinyl chloride). Although the ring bodies 4a to 4d have a solid structure in the illustrated example, the ring bodies 4a to 4d may have a hollow structure, and the hollow portion may be filled with a shock absorbing material such as sponge. Good. Further, these ring bodies 4a to 4d may be integrally configured or may be separate bodies. For example, it is possible to use old tires and the like.

A collar-shaped cap 7 is attached to the top of the column 3, and the ring bodies 4 a to 4 d are sandwiched between the cap 7 and the flange 6. The cap 7 has a function of preventing the ring bodies 4a to 4d from falling off and preventing rainwater and the like from entering the support column 3.

Further, a Teflon coat 8 for lubrication is provided on a portion where the ring bodies 4 a to 4 d are in sliding contact with the support column 3, a portion in which they are in sliding contact with the flange 6, and a portion which is in sliding contact with the cap 7, respectively. That is, the Teflon coat 8 is provided on each of the inner peripheral portion 9 of the ring bodies 4a to 4d, the upper surface portion 10 of the upper ring body 4a, and the lower surface portion 11 of the lower ring body 4d. Instead of the Teflon coat 8, radial bearings may be provided on the inner peripheral surface portions 9 of the ring bodies 4a to 4d, and thrust bearings may be provided on the upper surface portion 10 and the lower surface portion 11 of the ring body 4a. Further, when the ring bodies 4a to 4d are formed as separate structures, Teflon coats 8 are provided on the upper and lower surfaces of the ring bodies 4a to 4d so that the ring bodies 4a to 4d rotate independently and smoothly. May be.

The operation of this embodiment having the above configuration will be described.

When a vehicle 2 comes into contact with a guardrail 1 on an expressway as shown in FIG. 2, the vehicles 2 come into contact with a cushion material 4 (ring bodies 4a to 4d) inserted through a support column 3 and the cushion material 4 is Rotate. The rotation of the cushion member 4 reduces the frictional force F at the contact portion 12 between the vehicle 2 and the guard rail 1. Since the frictional force F of the contact portion 12 is thus reduced, the yaw moment M that the vehicle V entangles so as to bite into the guardrail g in FIG. 8 is reduced. Therefore, the vehicle 2 is prevented from breaking through (or getting over) the guardrail 1 and jumping out to the opposite lane 13.

Further, on a general road, when the vehicle 2 comes into contact, the cushion material 4 rotates and deforms appropriately, so that the vehicle 2 is prevented from being scratched. Therefore, if the guardrails 1 are provided on both sides of the vehicle 2 as shown in FIG. 3, it is possible to drive at high speed without worrying about scratches on the vehicle 2, even on a narrow road.

Further, in the case of restricting the lanes of the road such as during road construction, as shown in FIG. 4, a guardrail unit 15 in which a plurality of the above-mentioned guardrail single items 5 are attached to H steel material 14 is manufactured, and the unit 15 is manufactured as shown in FIG. By arranging as shown in Figure 2, it is possible to create a narrower lane than before, and to increase the number of lanes that were previously restricted to one lane to two lanes.

This modification is shown in FIG. As shown in the figure, the guardrail 1a has two columns 3 standing upright along the road, and an upper surface support plate 16 and a lower surface support plate 17 are laid between the columns 3 to support them. A plurality of ring-shaped cushion members 4 are rotatably arranged side by side between support plates. As shown in FIG. 6, the cushion member 4 is rotatably supported by a shaft 18 provided between an upper surface support plate 16 and a lower surface support plate 17. Further, a sliding Teflon coat 8 is provided on the sliding contact portion between the cushion member 4 and the shaft 18 as in the previous embodiment. According to this modification, the same effects as those of the previous embodiment can be exhibited, and the number of columns 3 standing on the road can be reduced, so that the on-site installation work is simplified.

[0018]

[Effect of the device]

 As described above, according to the present invention, it is possible to reduce the frictional force when the vehicle comes into contact with the vehicle and prevent the vehicle from being scratched and the vehicle from jumping out into the opposite lane.

[Brief description of drawings]

FIG. 1 is a side sectional view of a single guardrail according to an embodiment of the present invention.

FIG. 2 is a perspective view of the guardrail and a vehicle.

FIG. 3 is a diagram showing another usage example of the guard rail.

FIG. 4 is a perspective view showing the guardrail unit.

FIG. 5 is a perspective view of a guardrail according to a modified embodiment of the present invention.

6 is a cross-sectional view taken along the line AA of FIG.

FIG. 7 is a perspective view of a guardrail showing a conventional example,
(a) is a rod type and (b) is a plate type.

FIG. 8 is a diagram showing a frictional force and a yaw moment when a vehicle comes into contact with the guardrail on a highway or the like.

[Explanation of symbols]

 1 Guardrail 3 Pillar 4 Cushion material

Claims (1)

[Scope of utility model registration request] 1. A guardrail comprising: a pillar that is erected at an appropriate interval along a road; and a ring-shaped cushion member that is supported by the pillar and that freely rotates.