JP2007039962A - Protective cover for guard rail - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protective cover for a guard rail easily and rapidly post-installable on the existing guard rail and capable of effectively preventing a metal piece from additionally stuck therein by covering the head part outer peripheral portion of a fixing bolt projected to the the surface of the beam of the guard rail to close a clearance between the fixing bolt and the beam. <P>SOLUTION: This protective cover for the guard rail covers the head part outer peripheral portion of the fixing bolt projected to the surface of the beam in the guard rail in which the beam is fixed to column with the fixing bolt. The protective cover is formed of a flexible sheet material capable of being laid down on the surface of the beam. A through hole in which the head part of the fixing bolt can be inserted is formed in the sheet material. The thickness of at least the peripheral edge portion of the through hole is formed thicker than the clearance between the beam and the fixing bolt. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the guardrail in which the beam is fixed to the support column by the fixing bolt, the outer periphery of the head of the fixing bolt protruding from the surface of the beam is covered, so that the gap between the beam and the fixing bolt is The present invention relates to a protective cover for a guardrail that prevents a sharp metal piece or the like from entering due to a cause.

Conventionally, as shown in FIG. 4, the guardrail is composed of a beam V made of a mold having a corrugated cross section and a support P that supports the beam V. And the beam V is fixed to the support | pillar P with the fixing volt | bolt B via the bracket which is not illustrated in the both ends and the length direction intermediate part, The surface side has faced the roadway. In addition, the end portions in the length direction of the beam V are connected to each other by the fixing bolt B in a state where they are overlapped with the end portions in the length direction of the other beams V.
The head H of the fixing bolt B is formed in a bowl shape. The fixing bolt B is attached so that the head H is on the front side of the beam V, and is fixed from the back side of the beam V with a washer and a nut (not shown).

  However, the nut fixing the fixing bolt B may be loosened with time, and a slight gap may be formed between the beam V and the fixing bolt B. Recently, it has been confirmed throughout the country that a metal piece with a sharp pointed end is stuck in this slight gap, but it is presumed that one of the causes is an accident in contact with a guardrail of an automobile. Specifically, the body of the automobile is in contact with the head H of the fixing bolt B projecting to the surface side of the beam V, and a part of the body is caught in this gap by the impact at the time of contact, so that it may be broken. It is considered. And there is an incident that a passerby gets injured by touching this metal piece, and urgent safety measures are required.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to be able to easily and quickly be retrofitted to an existing guardrail, and to fix the head of a fixing bolt protruding on the surface of the beam in the guardrail. An object of the present invention is to provide a guardrail protective cover that covers the outer peripheral portion to close a gap between the fixing bolt and the beam and effectively prevent a new metal piece from being stuck.

  The guard rail protective cover of the present invention is a guard rail protective cover that covers the outer peripheral portion of the head of the fixing bolt protruding from the surface of the beam in the guard rail in which the beam is fixed to the support column by the fixing bolt. The sheet material is made of a flexible sheet material that can be laid on the surface of the beam. The sheet material has a through hole that can be inserted into the head of the fixing bolt, and at least the thickness of the peripheral portion of the through hole. Is formed thicker than the gap between the beam and the fixing bolt. Further, a reflective material that reflects light may be provided on the surface of the sheet material.

  The protective cover for the guard rail according to the present invention is such that the through hole formed in the sheet material is inserted into the head of the fixing bolt, and the sheet material is laid on the surface of the beam, and the peripheral portion of the through hole of the sheet material Since the outer peripheral portion of the head of the fixing bolt is covered by the above, the gap between the beam and the fixing bolt can be closed. As a result, foreign matter such as metal pieces can be reliably prevented from being stuck in the gap. Moreover, since the head of the fixing bolt is exposed to the outside through the through hole of the sheet material, there is an advantage that there is no problem in the maintenance work of the guard rail accompanied by the removal of the fixing bolt, for example, even after being attached to the guard rail. is there.

  In addition, in the case where a reflective material that reflects light is provided on the surface of the sheet material, the light is reflected by receiving the light of the vehicle that passes, so the position of the guardrail can be confirmed easily and reliably especially at night. In addition, the effect of gaze guidance can be obtained. In addition, the reflection sheet can be attached at the same time as the sheet material attaching operation, so that the operation of separately attaching the reflecting sheet becomes unnecessary, and the efficiency of the operation can be improved.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the guard rail protective cover 1 according to this embodiment includes a belt-like sheet material 2 and a reflection sheet 3 attached to the sheet material 2.
The sheet material 2 is made of chloroprene rubber having flexibility and weather resistance, and has a rectangular shape when viewed from the front with a length of 320 mm and a width of 55 mm. The thickness thereof is the beam V1 and the fixing bolt B (B1 to B6) shown in FIG. ) And a thickness of 3 mm. The sheet material 2 has a pair of circular through-holes 4 and 4 that are symmetrically formed from the center in the length direction. The through holes 4 and 4 have a diameter d = 35 mm, and the center distance L1 of each hole is 200 mm.
The reflective sheet 3 is formed by laminating an adhesive layer on the back surface of the reflective material layer, and is attached to the substantially central portion of the surface of the sheet material 2 via the adhesive layer.

  On the other hand, as shown in FIGS. 2 and 3, the guard rail G to which the guard rail protective cover 1 is attached is composed of beams V1 and V2 made of corrugated cross-sections and struts P that support the beams V1 and V2. Yes. In the beams V1 and V2, a concave portion v1 is formed at the center in the width direction, and convex portions v2 and v3 are formed at both ends in the width direction. The beams V1 and V2 are fixed to the column P by the fixing bolts B5 and B6 via the bracket C in the concave portion v1, and are connected by the fixing bolts B1 to B4 at the convex portions v2 and v3. The head H of the fixing bolt B (B1 to B6) is bowl-shaped and has an outer diameter of 32 mm. The heads H of the bolts are arranged on the beams V1 and V2 so that the head H of the bolt is arranged on the surface side of the beam V1. It is attached and fixed with a washer W and a nut N from the back side of the beam V2.

Next, a procedure for attaching the guardrail protective cover 1 to the existing guardrail G shown in FIGS. 2 and 3 will be described. The guardrail protective cover 1 is attached to the convex portion v2 in the vicinity of the fixing bolts B1 and B2 of the beam V1 and the convex portion v3 in the vicinity of the fixing bolts B3 and B4.
First, the surface of the convex portion v2 near the fixing bolts B1 and B2 is cleaned. Next, an adhesive capable of bonding metal and rubber is applied to the back surface of the guardrail protective cover 1. The adhesive-coated surface is directed to the surface of the beam V1, and the through holes 4 and 4 of the guardrail protective cover 1 are inserted into the heads H and H of the fixing bolts B1 and B2 protruding from the surface of the beam V1. The fixing bolts B1 and B2 are attached to the surface of the convex portion v2 in a state where the outer peripheral portions of the heads H and H are covered.
The attachment to the convex portion v3 is also performed by the same procedure, and the guard rail protective cover 1 is adhered to the surface of the convex portion v3 in a state where the outer peripheral portions of the heads H and H of the fixing bolts B3 and B4 are covered.

  Further, as shown in FIG. 2, a belt-like strip formed of the same material as the guardrail protective cover 1 so as to cover the end of the beam V1 arranged on the roadway side at the joint of the beam V1 and the beam V2. If the cover 5 is attached, it is possible to prevent foreign objects such as metal pieces from sticking into the gap between the beam V1 and the beam V2, and the safety of the guard rail G can be further improved.

  As described above in detail, in the guardrail protective cover 1 according to the present embodiment, the sheet material 2 is made of chloroprene rubber having flexibility and weather resistance, and is attached to the beams V1 and V2 of the guardrail G. Since there are through holes 4 and 4 having a diameter that can be inserted into the head H of the fixing bolt B and the thickness thereof is thicker than the gap ΔL2 between the beam V1 and the fixing bolt B, the guard rail protection is provided. By simply inserting the through holes 4 and 4 of the cover 1 into the head H of the fixing bolt B and sticking the guard rail protective cover 1 to the surface of the beam V1, the guard rail protective cover 1 can be removed. The outer peripheral portion of the head H of the fixing bolt B is covered with the peripheral portions of the through holes 4 and 4, and the gap ΔL 2 between the beam V 1 and the fixing bolt B can be closed. As a result, foreign matter such as a metal piece can be reliably prevented from entering the gap ΔL2. In addition, since the material cost is low and the manufacturing is easy, it is suitable for mass production and can be provided in large quantities at a low price. Furthermore, since it is a weather-resistant material, it is difficult to deteriorate and quality can be maintained for a long time.

  Moreover, since the protective sheet 1 for guardrails has a reflection sheet 3 for reflecting light attached to the surface of the sheet material 2, it can receive light from a vehicle to pass and reflect light. Therefore, especially at night, the position of the guardrail G can be confirmed easily and reliably, and the effect of visual line guidance can also be obtained. In addition, the reflection sheet 3 can be attached simultaneously with the operation of attaching the sheet material 2 to the guard rail G, and the operation of attaching the reflection sheet 3 to a beam or the like becomes unnecessary, so that the efficiency of the operation can be improved.

  Furthermore, since the head H of the fixing bolt B is exposed to the outside from the through holes 4 and 4 of the sheet material 2, even after the guard rail protective cover 1 is attached to the guard rail G, for example, the fixing bolt B There is an advantage that there is no hindrance to the maintenance work of the guardrail accompanied by the removal.

  The shape of the sheet material 2 is not limited to the shape of the present embodiment. For example, the sheet material is formed in a size that can be attached to the entire joint portion of the beams V1 and V2, and the head H of the fixing bolt B is formed. The shape in which the through-hole which can be penetrated in each was formed may be sufficient, and the shape which coat | covers the outer peripheral part of the head of each fixing bolt B separately, for example, a donut shape, may be sufficient.

  Furthermore, the thickness of the sheet material 2 is not limited to 3 mm thickness, and the thickness of the peripheral portion of the through hole 4 only needs to be thicker than the gap ΔL2 between the beam V1 and the fixing bolt B. For example, the other thickness may be thinner than the thickness of the peripheral portion of the through hole 4. Further, the material of the sheet material 2 is not limited to chloroprene rubber, and other materials may be used as long as the sheet material 2 has flexibility capable of being attached to the surface of the beam V1. Moreover, as a characteristic of a material, you may have not only flexibility but a softness | flexibility and elasticity. If the material has flexibility, it is easier to fit the surface of the uneven beam V1. If the material has elasticity, the sheet material 2 is elastically deformed when the automobile contacts the guardrail protective cover 1. The impact force from the automobile can be reduced, and the breakage and deformation of the guardrail G and the guardrail protective cover 1 can be effectively prevented. Furthermore, an adhesive layer may be previously laminated on the back surface of the guardrail protective cover 1. In this way, the attachment work becomes easier.

  The outer dimensions of the guardrail protective cover 1 and the center-to-center distance L1 of the through holes 4 and 4 are set in accordance with general beam dimensions. However, the dimensions are not limited to this, and the beam to be attached is not limited to this. It can change suitably according to a dimension.

  Note that the reflective sheet 3 is not essential, and the guardrail protective cover 1 may be configured by only the sheet material 2.

  Further, in this embodiment, the guardrail protective cover 1 is attached so as to cover the outer peripheral portion of the head H of the fixing bolts B1 to B4 in the convex portions v2 and v3 protruding to the roadway side. The guard rail protective cover 1 may be attached so as to cover the outer peripheral portion of the head H of the fixing bolts B5 and B6 in the recess v1.

(A) It is a front view of the protective cover 1 for guardrails concerning one Embodiment of this invention. (B) It is XX sectional drawing of the protective cover 1 for guardrails shown to (a). FIG. 2 is an external perspective view showing a state in which the guard rail protective cover 1 shown in FIG. It is explanatory drawing which shows the relationship between the protective cover 1 for guardrails, and the fixing bolt B attached to the guardrail G. It is an external appearance perspective view which shows the conventional guardrail.

Explanation of symbols

1 Guard rail protective cover 2 Sheet material 3 Reflective sheet (reflective material)
4 Through-hole G Guardrail B (B1-B6) Fixing bolt H Head P Post V (V1, V2) Beam

Claims (2)

In the guard rail that fixes the beam to the column with the fixing bolt, a guard rail protective cover that covers the outer peripheral portion of the head of the fixing bolt protruding on the surface of the beam,
The sheet material is made of a flexible sheet material that can be laid on the surface of the beam. The sheet material has a through hole that can be inserted into the head of the fixing bolt, and at least the thickness of the peripheral portion of the through hole. Is formed thicker than the gap between the beam and the fixing bolt.   The protective cover for guardrail according to claim 1, wherein a reflective material that reflects light is provided on a surface of the sheet material.

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