JP4719022B2 - Road guard fence connection structure and road guard beam material - Google Patents

Description

  The present invention relates to a connecting structure of a road guard fence such as a guardrail and a beam material for the road guard fence, and particularly suitable for roads when preventing adhesion of metal pieces peeled off from a traveling vehicle in contact with the road guard fence. The present invention relates to a guard fence connection structure and a beam material for a road guard fence.

  Many guardrails and the like have been conventionally installed as road protection fences provided on ordinary roads and highways. These road fences prevent a vehicle with the wrong traveling direction from deviating outside the road, on the opposite lane, or on the sidewalk, while minimizing vehicle occupant injury and vehicle damage, Its purpose is to restore it in the direction of travel, and it has the purpose of suppressing pedestrians and bicycles from falling or crossing over.

  In particular, since the guard rails arranged along the road shoulders are constructed so as to run in a belt shape facing the road, they are also useful as equipment for inducing a change in road conditions such as a sharp curve. For the purpose of reducing traffic accidents at night, guardrails are also used in which reflectors that efficiently reflect the light of the headlights are installed on the tops of the columns and the surface of the beam material.

  In general, a guard rail has a metal wavy beam member attached to a column that is erected at a predetermined interval. For example, as shown in FIG. 8, the beam material 113 is fixed to the support column 117 by a fixing bolt 118 and a nut 119.

In this way, by connecting the beam member 113 composed of peaks and valleys along the road, it is possible to create a corrugated cross-section guardrail with appropriate rigidity and toughness, and when a traveling vehicle collides Even in the case, energy can be absorbed by the beam member 113 and the support column 117 against the impact.

  By the way, many cases where metal pieces adhere to such a guardrail have been confirmed throughout the country. Some of the metal pieces peeled off and adhered to the traveling vehicle that collided with the guard rail. For example, as shown in FIG. 9, the metal pieces adhered with a sharp blade-like metal piece protruding toward the roadway. ing. As shown in FIG. 9A, this metal piece is attached so as to be inserted into a gap between the head of the bolt 121 and the beam member 113 for connecting the adjacent beam members 113 in the longitudinal direction. In some cases.

If such a sharp metal piece protrudes from the guard rail to the road, a passerby traveling on the road with a bicycle or the like may come into contact with the road and may be injured.

  Conventionally, a method has been proposed in which a bolt for fixing a guardrail to a support column is regarded as a dangerous protrusion and a vehicle is prevented from being caught by the bolt (see, for example, Patent Document 1). In the disclosed technique shown in Patent Document 1, a convex shape is formed around the mounting bolt on the beam surface, and the gap between the bolt and the beam surface is buried to make it difficult to catch the vehicle body such as a vehicle. The purpose is to improve performance.

  In addition to the case where a metal piece adheres to the gap between the head of the bolt 121 and the beam member 113 as described above, as shown in FIG. In some cases, the metal piece is attached so as to be inserted into the gap between the joint portions 131 where the portions are overlapped. The adhesion of the metal pieces as shown in FIG. 9B is considered to occur for the following reason.

  When the beam members 113a and 113b are connected to each other, the guard rails are overlapped with each other on the road side of the support column 117 and joined by bolts and nuts via brackets. The traveling direction of the automobile is changed from the direction in which the beam material 113a on the roadway side is disposed as shown by the arrow A in FIG. 9B to the direction in which the beam material 113b on the roadside is disposed. The beam material 113b on the road shoulder side is connected to be overlapped on the back surface (back side) of the beam material 113a on the roadway side. For this reason, since the gap of the joint portion 131 is not generally formed in a shape facing the traveling direction A of the automobile, the metal piece peeled off from the automobile as described above is usually separated from the beam member 113a and the beam. It cannot be attached to the connecting portion with the material 113b.

  However, the traveling vehicle jumps out in the opposite lane or travels too far to avoid the obstacle, and as shown in the direction B in FIG. The beam material 113 of the guard rail comes into contact with and the beam material 113b of the connecting portion is pressed to create a gap at the contact portion between the beam material 113b and the beam material 113a, and travels in the direction B while contacting the generated gap. A part of the car body of the car to be peeled off is pierced as a metal piece and attached.

In order to prevent such adhesion of metal pieces, for example, a technique as disclosed in Patent Document 2 is disclosed. In Patent Document 2, a convex shape is formed on the beam surface on the road shoulder side in the overlapping portion of the beam material and the beam material to cover the overlapping gap, thereby preventing the vehicle body from being caught.

However, even in this proposal, it is not sufficient to prevent the gap between the joints from expanding due to the automobile in contact with the guardrail pushing the beam material on the shoulder side.
Utility Model Registration No. 3114808 Utility Model Registration No. 3114823

  Therefore, the present invention has been devised in view of the above-mentioned problems, and the object of the present invention is to provide a peak and a valley (referred to here as a valley) for beam materials adjacent to each other. A structure for connecting a road guard fence and a beam that can more effectively prevent a metal piece from being inserted into a gap between joint portions that overlap with a valley surface on the back surface of the beam. To provide materials.

  In order to solve the above-described problems, a road guard fence connection structure and a beam material according to the present invention project an insertion piece from a mountain end surface of a beam material on the roadway side of each beam material, and the beam on the roadway side. An opening into which the insertion piece can be inserted is formed in the peak portion of the beam material on the road shoulder side that is connected to the material, and the insertion piece is opened when the beam material on the roadway side and the beam material on the road shoulder side are connected. To insert.

  That is, a state in which two adjacent corrugated beam materials are piled up on the crest and trough of a road guard fence in which the beam material is joined to pillars erected at a predetermined interval. In the connecting structure of the road guard fence connected in the longitudinal direction, the insertion piece projects from the end face of the beam material on the roadway side among the beam materials, and the beam on the roadside is connected to the roadway side. An opening into which the insertion piece can be inserted is formed in the peak portion of the material. The beam material on the roadway side and the beam material on the road shoulder side are in a state where the insertion piece is inserted into the opening. Thus, the bolts are connected to each other by bolts through bolt connection holes formed in at least the peaks.

  In the present invention, the insertion piece protrudes from the end surface of the beam material on the roadway side of each beam material, and the insertion piece can be inserted into the peak portion of the roadside beam material connected to the beam material on the roadway side. An opening is formed, and an insertion piece is inserted into the opening when connecting the beam material on the roadway side and the beam material on the road shoulder side.

  As a result, in the road guard fence connection structure to which the present invention is applied, even when the automobile travels on the opposite lane and contacts the joint portion of the guardrail, it only touches the insertion piece, and the gap Since the vehicle body is not caught on the portion, it is possible to effectively prevent the metal pieces from adhering.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  The connection structure of the road guard fence to which the present invention is applied is applied to a guardrail provided on a general road, an expressway, or the like. FIG. 1 (a) is a perspective view of a joint portion of a guardrail 4 to which the connecting structure 1 to which the present invention is applied is applied, and FIG. 1 (b) is a side view thereof.

  The guard rail 4 includes a support column 41 standing along a road at a predetermined interval, and a metallic corrugated beam material 42 installed between the standing support columns 41.

  The support column 41 is made of a steel pipe, and the support column 41 and the beam member 42 (the beam member 42a on the roadway side and the beam member 42b on the road shoulder side) are attached via a bracket 51 with bolts 44a and nuts 44b.

The beam material 42 is connected to another beam material 42 adjacent in the vicinity of the support column 41 in the longitudinal direction. At the time of such connection, the peak portions and the valley portions are overlapped with each other for the beam material 42a and the beam material 42b adjacent to each other, the bolt 48 is inserted into the bolt connection hole 71, and the nut 49 is screwed. It will be fixed by doing.

  In this way, the two adjacent beam members 42 that are in contact with the front surface of the metal joint 45 form a substantially continuous appearance along the longitudinal direction. In addition, by connecting the beam member 42 composed of peaks and valleys along the road in this way, it is possible to create a corrugated cross-section guard rail 4 having appropriate rigidity and toughness, and the traveling vehicle Even in the case of a collision, energy can be absorbed by the beam material 42 and the column 41 with respect to the impact.

  Next, the structure of the connection structure 1 according to the present invention applied to the guard rail 4 having such a structure will be described.

  The connection structure 1 is applied to the connection parts of the beam materials adjacent to each other. 2 (a) is a perspective view of the beam member 42a, FIG. 2 (b) is a side view thereof, and FIG. 2 (c) is a front view thereof. 3 (a) is a perspective view of another beam member 42a connected to the beam member 42a, FIG. 3 (b) is a side view thereof, and FIG. 3 (c) is a front view thereof. Yes. Further, FIG. 4 shows the overall configuration of this beam material.

  The beam member 42a and the beam member 42b are formed with valley portions 62 formed between two peak portions 61, and two bolt connection holes 71 are formed (opened) in each peak portion 61, respectively. In the valley portion 62, two bolt connection holes 71 are also cut. In order to expand the allowable range of misalignment error when the beam members 42a and 42b are overlapped, the bolt connection hole 71 of the beam member 42a is particularly longer in the longitudinal direction than the bolt connection hole 71 of the beam member 42b. You may make it comprise a diameter large. Incidentally, the peak portion 81 of the peak portion 61 is described as an example in the case where it is configured in a planar shape, but is not limited to this, and the peak portion 81 of the peak portion 61 is streamlined, You may make it comprise with a curve type.

  Further, an insertion piece 65 is projected from the peak end face 64 of the beam material 42a. The insertion piece 65 is formed in a tapered shape as shown in FIG. 2 (b), and the thickness thereof is the same as the plate thickness of the beam material 42. The insertion piece 42 is formed by bending downward as shown in FIG. 2 (b). The bending angle of the insertion piece 65 may be any angle, for example, 90 °.

  On the other hand, in the peak portion 61 of the beam material 42b, an opening 66 into which the insertion piece 42 can be inserted is formed. The opening 66 is formed in a direction away from the peak end face 67 as compared with the bolt connection hole 71 described above, in other words, the bolt connection hole 71 is longer than the opening 66 in the longitudinal direction of the beam member 42b. It will be formed so that it may be located in the mountain part end surface 67 side. That is, the opening 66 in the beam member 42b is formed at a position where the insertion piece 65 comes when the beam member 42a is overlapped.

  Incidentally, the size of the opening 66 may be configured so that the insertion piece 65 can be inserted. For this reason, this opening part 66 will be in the state adjusted beforehand according to the thickness of the insertion piece 42 which should be inserted in this, the length of the width direction, and a bending angle.

In addition, the space | interval of C1 and C2 in FIG. 4 may be comprised by what length. That is, the interval between C1 and C2 may be configured longer or may be configured shorter depending on the interval between the columns 41.

When the beam member 42a is overlapped with the beam member 42b, as shown in FIGS. 5 and 6, the bolt connection holes 71 formed in the peak portion 61 and the valley portion 62 are aligned with each other, and the opening portion The insertion piece 65 is inserted into 66. After this state, each bolt connection hole 71 is fixed by screwing a bolt and a nut.

In addition, as shown in FIG. 6, you may make it the insertion piece 65 protrude in the back side of the beam material 42 by predetermined length. Not only at the time of installation, the vehicle advances while pushing the beam material 42b on the shoulder side, and even if a gap is formed with the beam material 42a on the roadway side, the insertion piece 65 has a length that does not come out of the opening 66. By being formed so as to protrude, the overlapped portion of the overlap is always covered and the vehicle can be prevented from being caught in the gap portion of the mountain portion 61.

As a result, the connecting structure 1 as shown in FIG. 1 is completed. As a result, the beam member 42a is positioned on the road side and the beam member 42b is positioned on the road shoulder side. In the road guard fence connection structure 1 having such a configuration, the vehicle traveling in the direction B in FIG. 7 jumps out to the opposite lane, travels too far to the other side to avoid obstacles, By contacting the guard rail 4 and pressing the beam member 42b at the connecting portion, a gap may be generated at the contact portion between the beam member 42b and the beam member 42a. However, in the connection structure 1 to which the present invention is applied, even when such a gap is formed, the insertion piece 65 protruding from the peak end surface 64 of the beam material 42a is inserted into the opening 66 cut out in the beam material 42b. Therefore, as shown in FIG. 7, the gap piece can be covered with the insertion piece 65 itself. In particular, the peak portion 61 of the beam member 42 protrudes toward the roadway side, and if a gap portion is formed in the peak portion 61, the vehicle body is likely to get caught there. Only the formed gap portion is covered with the insertion piece 65.

As a result, even when the automobile has come into contact with the joint portion 91, the vehicle body is only brought into contact with the insertion piece 65, and the vehicle body is not caught in the gap portion. It becomes possible.

Further, the insertion piece 65 is inserted into the peak portion 61. For this reason, for the bicycle or pedestrian on the shoulder side of the protective fence, the portion where the insertion piece 65 protrudes becomes a concave portion of the beam when viewed from the shoulder side, so that the pedestrian or the like is less likely to be caught by this. is there.

(a) is a perspective view of the overall structure of the guard rail to which the connecting structure to which the present invention is applied is applied, and (b) is a side view of the entire structure of the guard rail. It is a figure for demonstrating per structure of one beam material. It is a figure for demonstrating about the structure of the other beam material connected with a beam material. It is a figure which shows the whole structure of the beam material to which this invention is applied. It is the perspective view which looked at the state which piled up mutually adjacent beam material from the road side. It is the perspective view which looked at the state which piled up mutually adjacent beam material from the road shoulder side. It is a figure for demonstrating the effect of this invention. It is a side view of a general guardrail. It is a figure for demonstrating about the case where a metal piece adheres to a guardrail.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Connecting structure 4 Guard rail 41 Support | pillar 42 Beam material 42a Beam material 42b Roadside beam material 43 Bolt 44 Nut 48 Bolt 49 Nut 51 Bracket 61 Mountain part 62 Valley part 65 Insertion piece 66 Opening part

Claims (4)

A road guard fence in which beam members are joined to pillars erected at a predetermined interval, and two adjacent wave-shaped beam members are long in a state where their peaks and valleys overlap each other. In the connecting structure of road fences connected in the direction,
The insertion piece protrudes from the end face of the beam material on the roadway side among the above beam materials,
An opening into which the insertion piece can be inserted is formed in the peak portion of the beam material on the roadside connected to the roadway side,
The beam material on the roadway side and the beam material on the road shoulder side are mutually connected through the bolt connection holes formed in at least the respective peak portions after the insertion piece is inserted into the opening. A connecting structure for road fences, which is connected with bolts. A road guard fence in which beam members are joined to pillars erected at a predetermined interval, and two adjacent wave-shaped beam members are long in a state where their peaks and valleys overlap each other. In the beam material of the road guard fence connected in the direction,
The insertion piece protrudes from the end face of the one end of the beam material to which the beam material is connected, and an opening into which the insertion piece can be inserted is formed in the peak of the other end of the beam material to be overlapped. A beam material for a road guard fence characterized by being formed. The beam material for a road guard fence according to claim 2, wherein the insertion piece protrudes from the back side of the beam with a predetermined length. The beam material of the road guard fence according to claim 2 or 3 , wherein the peak portion of the mountain portion is formed in a planar shape, and an insertion piece protrudes from at least a part thereof.

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