JP4465307B2 - Washer for preventing metal pieces from adhering to road fences - Google Patents

Description

  The present invention provides a washer for preventing metal piece adhesion of a road protection fence and a road protection fence suitable for preventing adhesion of a metal piece peeled off from a traveling vehicle contacting a road protection fence such as a guard rail or a guard pipe. The present invention relates to a method for preventing adhesion of metal pieces.

  Guard rails, guard pipes, and the like have been widely known as road protection fences provided on general 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 a 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. In order to reduce traffic accidents at night, guardrails have been developed in which reflectors that efficiently reflect the light from the headlights are installed on the top of the columns and the surface of the beam.

  In general, a guardrail is provided with a metal beam material having a steel property such as iron on pillars erected at a predetermined interval. For example, as shown in FIG. 9, the beam material 113 is in close contact with the periphery of the support column 117 and is fixed to the support column 117 with fixing bolts 118 and nuts 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 with respect to the impact.
Japanese Examined Patent Publication No. 4-66962 Japanese Utility Model Publication No. 7-25022 Japanese Patent Application No. 2004-65575

  By the way, many cases where metal pieces adhere to such a guardrail have been confirmed throughout the country. This metal piece is thought to be a part of a traveling vehicle that has collided with the guard rail and peeled off and attached. For example, as shown in FIG. 10, a sharp blade-like metal piece protrudes toward the roadway side. It is attached. As shown in FIG. 10A, the 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, as shown in FIG. 10 (b), the beam members 113 adjacent to each other are attached so as to be inserted into the gap between the joint portions 131 in which the peaks and valleys are overlapped. There is also.

  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. For this reason, even if it is a case where a vehicle collides with a guardrail, it is calculated | required to improve into the structure which can prevent adhesion of a metal piece.

  Conventionally, a method for covering a bolt for fixing the guardrail to the support column as a dangerous protrusion has been proposed (for example, see Patent Document 1). In the disclosed technique of Patent Document 1, a cap-shaped container that is transparent to ultraviolet rays is filled with a predetermined amount of putty made of an ultraviolet curable resin composition and an inorganic filler, and this is covered with a bolt as a dangerous protrusion. Yes, by curing it through ultraviolet rays, the safety of pedestrians is improved.

  However, the technology disclosed in Patent Document 1 is intended only to prevent a pedestrian from coming into contact with a bolt or the like as a dangerous projection, and a metal piece adheres to the bolt or the like due to a vehicle collision. It is not intended to prevent. For this reason, it does not necessarily function effectively with respect to adhesion of the metal piece based on the collision of the traveling vehicles as described above.

  Patent Document 2 discloses a configuration that suppresses the occurrence of a gap in the overlapped joint portions of the beam materials adjacent to each other. Patent Document 3 also proposes a bolt for connecting adjacent beam members and a protective member capable of covering the entire joint portion of these beam members.

  However, in the disclosed technology of Patent Document 2, the beam material is focused on the assemblability and the appearance, and in Patent Document 3 related to the application by the applicant and others, the manufacturing cost and driver visibility are focused. Is placed. For this reason, these Patent Documents 2 and 3 similarly do not take into account the point of preventing the adhesion of the metal piece due to the collision of the vehicle, and do not always function effectively.

  In other words, it was necessary to focus on only the prevention of adhesion of metal pieces and ensuring the safety of passers-by, and to quickly devise a configuration excellent in terms of its effect and cost. In addition, it is also necessary to devise a method that is as versatile as possible so that a large number of existing guard rails can be subjected to the metal piece adhesion prevention treatment.

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is to adhere metal pieces peeled off from a traveling vehicle that contacts a road guard fence such as a guard rail or a guard pipe. It is an object of the present invention to provide a metal piece adhesion preventing washer for a road protection fence and a method for preventing metal piece adhesion of a road protection fence.

  The present inventor is made of a substantially elliptical resin or rubber in which a notch portion is formed from the short axis direction with respect to a joint bolt having a head protruding to the roadway side in a longitudinal direction connection portion of a beam material of a road guard fence. In addition, the above-described problem is solved by fitting the washer main body portion gradually raised from the outer periphery toward the notch portion.

  That is, the washer for preventing metal piece adhesion of the road protection fence to which the present invention is applied is made of a synthetic resin or rubber having a substantially elliptical shape with a notch formed in the short axis direction and having the above-mentioned cut from the outer periphery. It is equipped with a washer main body that is gradually raised toward the notch, and the notch is fitted to a joint bolt whose head protrudes toward the roadway in the longitudinal direction connection part of the beam material of the road protection fence. It is supposed to be free.

  Further, a washer for preventing metal piece adhesion of a road guard fence to which the present invention is applied includes a washer body portion made of synthetic resin or rubber having a substantially elliptical shape with a hole portion formed in the center, and the hole portion described above. Is capable of being inserted into a joint bolt having a head projecting toward the roadway side in the longitudinal direction connection portion of the beam material of the road protection fence.

  That is, the method for preventing the metal piece from adhering to the road guard fence to which the present invention is applied, is to cut from the minor axis direction the joint bolt with the head protruding to the roadway side at the longitudinal connection portion of the beam material of the road guard fence. A washer body portion made of synthetic resin or rubber having a substantially elliptical shape with a notch portion and gradually raised from the outer periphery toward the notch portion is fitted.

  In addition, the method for preventing metal piece adhesion of a road guard fence to which the present invention is applied is such that a hole is formed in the center of a joint bolt with a head projecting on the roadway side in the longitudinal direction connection portion of the beam material of the road guard fence. Further, it is screwed through a washer main body portion made of synthetic resin or rubber having substantially elliptical elasticity.

  In addition, the method for preventing metal piece adhesion of a road guard fence to which the present invention is applied is the above road guard fence with respect to a joint bolt having a head projecting on the roadway side in the longitudinal connection portion of the beam material of the road guard fence. In order to prevent the metal piece peeled off from the traveling vehicle in contact with the joint bolt from adhering to the joint bolt, at least the outer peripheral portion thereof is covered with a caulking agent.

  In the present invention, the joint bolt with the head projecting on the roadway side in the longitudinal direction connection portion of the beam material of the road guard fence is made of a substantially elliptical resin or rubber having a notch formed in the short axis direction. At the same time, the washer main body part gradually raised from the outer periphery toward the notch part is fitted and covered with a caulking agent.

  Thereby, in this invention, adhesion of the metal piece which peeled from the traveling vehicle which contacts the guard rails for roads, such as a guardrail and a guard pipe, can be prevented effectively.

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

  The metal piece adhesion preventing washer to which the present invention is applied is represented by, for example, a guard rail, a guard fence, a guard pipe, and the like, and is disposed on a road protection fence provided on a general road, an expressway, or the like. FIG. 1 (a) is a perspective view of the entire structure of a guard rail 4 on which a metal piece adhesion preventing washer 1 to which the present invention is applied is provided, and FIG. 1 (b) is a side view thereof.

  The guard rail 4 includes a support column 41 that is erected along a road at a predetermined interval, and a metallic beam member 42 that is installed between the erected columns 41.

  The support column 41 can be made of steel pipe or wood, and is provided with a bolt hole (not shown) penetrating through the upper portion. The beam member 42 is attached to the support column 41 via the bracket 61 by bolts 44a and nuts 44b inserted through bolt holes (not shown).

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, with respect to the beam material 42a and the beam material 42b adjacent to each other, the peak portion and the valley portion are overlapped, the bolt 48 is inserted into the fixing hole (not shown), and the nut 49 is screwed. It will be fixed.

  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.

  As shown in FIG. 1, the metal piece adhesion preventing washer 1 is attached to the bolt 48 for connecting the adjacent beam members 42 to the guard rail 4 having such a configuration.

  FIGS. 2A and 2B show the detailed configuration of the metal piece adhesion preventing washer 1. This metal piece adhesion preventing washer 1 is made of a substantially elliptical resin or rubber having a notch 11 formed in the minor axis direction. In the example of FIG. 2, a case where the major axis direction is 60 mm and the minor axis direction is 40 mm is shown.

  The metal piece adhesion preventing washer 1 is configured to gradually rise from the outer periphery 12 toward the cutout portion 11. In the example of FIG. 2, the height is gradually increased from the outer periphery 12 having a thickness of 1 mm or less toward the notch 11.

  Further, the notch 11 can be freely fitted to the bolt 48. In order to improve the fixing property to the bolt 48, the notch portion 11 may be formed with a flange portion 14 that can be interposed on the lower surface of the head of the bolt 48, for example.

  Actually, when the washer 1 for preventing adhesion of metal pieces is attached to the bolt 48, the notch 11 is fitted to the bolt 48, and then the longitudinal direction thereof is elongated as shown in FIG. It will be fixed according to the direction.

  FIGS. 3A and 3B are a perspective view and a front view showing a state in which the metal piece adhesion preventing washer 1 is fixed to the bolt 48. FIG. 4A and 4B are side views of the fixed state viewed from the major axis direction or the minor axis direction, respectively. The bolt 48 has a convex shape with the center 51 at the head as a vertex. Therefore, by adjusting the height of the head outer periphery 52 of the bolt 48 and the height of the notch 11 on the surface of the metal piece adhesion preventing washer 1 to be substantially the same, FIG. As shown, the upper surface H of the metal piece adhesion preventing washer 1 and the upper surface I of the bolt 48 can be matched. Thereby, when the metal piece adhesion preventing washer 1 is fitted to the bolt 48, it is possible to create a shape that gradually rises from the outer periphery 12 to the head center 51 as a whole.

  Further, by forming the above-described collar portion 14 in advance in the notch portion 11, when the metal piece adhesion preventing washer 1 is fitted to the bolt 48, the collar portion 14 is attached to the head of the bolt 48. It becomes possible to interpose it on the lower surface 53, and it becomes possible to fix more firmly.

As described above, the metal piece adhesion preventing washer 1 to which the present invention is applied is made of a relatively soft material such as synthetic resin or rubber having elasticity, and has a substantially elliptical shape. In general, the metal constituting the vehicle body surface of a traveling vehicle is often thinner than the bolt 48. For this reason, when such a traveling vehicle increases in speed and comes into contact with the guard rail 4, the surface of the vehicle body is peeled off particularly by the bolt 48 protruding from the guard rail 4 and adheres to the gap between the head of the bolt 48 and the beam member 42. . Therefore, in the present invention, as described above, the metal piece adhesion preventing washer 1 made of an elastic resin or rubber that constitutes the vehicle surface of the traveling vehicle is fitted to the bolt 48 so that it travels in contact with the guard rail 4. The vehicle body first comes into contact with the metal piece adhesion preventing washer 1 without first contacting the bolt 48 with the vehicle body surface. As a result, since the vehicle surface of the traveling vehicle is in contact with the metal piece adhesion preventing washer 1 having a lower mechanical characteristic than itself and being softer, it does not peel off with this, and the metal peeled off as before It becomes possible to prevent the piece from adhering to the bolt 48.

  In particular, the metal piece adhesion preventing washer 1 to which the present invention is applied is configured in a substantially ellipsoidal shape, and is fitted in a state in which the major axis thereof coincides with the longitudinal direction of the guard rail 4. The longitudinal direction of the guard rail 4 is the same direction as the road, in other words, the same direction as the traveling direction of the vehicle. For this reason, the traveling vehicle which contacts the metal piece adhesion preventing washer 1 comes into contact with the long axis direction. The metal piece adhesion preventing washer 1 has a longer axis that rises more gently than the minor axis direction, so that it is possible to further reduce the impact force of a traveling vehicle that contacts the same direction. .

  Furthermore, the metal piece adhesion preventing washer 1 to which the present invention is applied can match the height of the notch 11 and the height of the outer periphery 52 of the head of the bolt 48, so that there is no gap or step between them. Since it can be eliminated, it is possible to more reliably reduce peeling of the vehicle surface of the traveling vehicle.

  FIG. 5 (a) shows a metal piece adhesion preventing washer 2 as another example to which the present invention is applied. This metal piece adhesion preventing washer 2 is made of a substantially elliptical resin or rubber having a hole 21 at the center. In the example of FIG. 5, the major axis direction is 60 mm, the minor axis direction is 40 mm, and the plate thickness is 3 mm.

  The metal piece adhesion preventing washer 2 has a gentle plane without gradually rising from the outer periphery 12 toward the hole 21.

  The hole 21 can be inserted into the bolt 48. When the bolt 48 is actually fixed to the beam member 42, the metal piece adhesion preventing washer 2 is interposed between the head of the bolt 48 and the beam member 42 and screwed to the nut 49. become.

  FIGS. 6A and 6B are a perspective view and a front view showing a state where the metal piece adhesion preventing washer 2 is fixed to the bolt 48. FIG. FIGS. 7A and 7B are side views of the fixed state viewed from the major axis direction or the minor axis direction, respectively. The metal piece adhesion preventing washer 2 is similarly fixed in a state where the major axis direction is matched with the longitudinal direction. That is, the vehicle surface of the traveling vehicle that comes into contact with the guard rail 4 by interposing the metal piece adhesion preventing washer 2 made of elastic resin or rubber constituting the vehicle surface between the bolt 48 and the beam member 42. No longer peels off. Further, the gap between the bolt 48 and the beam member 42 can prevent the metal piece from adhering to the gap because the metal piece adhesion preventing washer 2 is inserted.

  In particular, the metal piece adhesion preventing washer 1 to which the present invention is applied is formed in a substantially ellipsoidal shape and is fixed in a state in which the major axis thereof coincides with the longitudinal direction of the guard rail 4. It is possible to further reduce the impact force of the traveling vehicle in contact with the vehicle.

  In the above-described embodiment, the case where the metal piece adhesion preventing washers 1 and 2 are fixed to the bolt 48 has been described as an example, but the present invention is not limited to this. Absent. For example, as shown in FIG. 8, a joint portion 81 formed by overlapping the end portions of the beam material 42 may be covered with a caulking agent 82. The caulking agent 82 may be a silicon or epoxy caulking agent.

  Further, the bolt 48 may be covered with a caulking agent 82. At this time, at least only the outer periphery 52 of the head of the bolt 48 may be covered with the caulking agent 82. As a result, the gap between the bolt 48 and the beam member 42 is covered with the caulking agent 82.

  Thus, the caulking agent 82 is coated on the joint portion 81 formed by overlapping the end portions of the beam material 42 and the gap between the bolt 48 and the beam material 42 for connecting the beam material 42. Thus, it is possible to prevent the metal piece peeled off by the collision of the traveling vehicle from adhering to the location.

  In the above-described embodiment, the case where the metal piece adhesion preventing washer 1 and the caulking agent 82 are attached to the guard rail 4 is described as an example, but the present invention is not limited to this case. Of course, it may be attached to a so-called guard pipe or other road protection fence. In such a case, for example, the metal piece adhesion preventing washer 1 and the caulking agent 82 may be attached to the joint bolt for connecting the beam pipes whose ends are abutted to each other in the longitudinal direction.

In addition, this invention is not limited to the example mentioned above, It can be freely fitted and inserted into a joint bolt with a head projecting on the roadway side in the longitudinal direction connection part of the beam material of any road protection fence. Of course, what is necessary is just to be said.

It is a figure which shows the whole guardrail structure by which the metal piece adhesion prevention washer to which this invention is applied is arrange | positioned. It is a figure which shows the detailed structure of the washer for metal piece adhesion prevention. It is a figure which shows the state which fixed the metal piece adhesion prevention washer to the volt | bolt. It is the side view which looked at the state which fixed the washer for metal piece adhesion prevention to the bolt from the major axis direction or the minor axis direction. It is a figure which shows the metal piece adhesion prevention washer as another example to which this invention is applied. It is a figure which shows the state which fixed the metal piece adhesion prevention washer as another example to the volt | bolt. It is the side view which visually recognized the state which fixed the washer for metal piece adhesion prevention as another example to a bolt from the major axis direction or the minor axis direction. It is a figure shown about the example which coat | covers the joint part comprised by mutually superimposing the edge part of a beam material with a caulking agent. 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

1, 2 Washer 4 for preventing metal piece adhesion Guard rail 11 Notch 12 Outer periphery 14 Ridge 41 Strut 42 Beam material 43 Bolt 44 Nut 45 Elevation 48 Bolt 49 Nut 51 Head center 52 Head outer periphery 61 Bracket 82 Caulking agent

Claims (12)

It comprises a substantially elliptical elastic synthetic resin or rubber having a notch formed from the minor axis direction, and has a washer main body gradually raised from the outer periphery toward the notch,
The metal of the road protection fence is characterized in that the notch is freely engageable with a joint bolt having a head protruding to the roadway side in the longitudinal direction connection portion of the beam material of the road protection fence. Washer for preventing single adhesion. In order to prevent the metal piece peeled off from the traveling vehicle that contacts the road guard fence from adhering to the joint bolt, the washer main body portion has the major axis direction aligned with the longitudinal direction. The washer for preventing metal piece adhesion of the road protection fence according to claim 1 , wherein the washer can be fixed to the road. The washer for preventing metal piece adhesion of a road guard fence according to claim 1 or 2, wherein the outer periphery of the washer main body has a height of 1 mm or less. The road protection according to any one of claims 1 to 3, wherein the notch is formed with a flat plate having a thickness of 1 mm or less that can be interposed on the lower surface of the head of the joint bolt. Washer for preventing adhesion of metal pieces on the fence. A washer main body made of synthetic resin or rubber having a substantially elliptical shape with a hole formed in the center,
The above-mentioned hole portion can be inserted into a joint bolt having a head protruding to the roadway side in the longitudinal direction connection portion of the beam material of the road protection fence. Prevention washer. In order to prevent the metal piece peeled off from the traveling vehicle that contacts the road guard fence from adhering to the joint bolt, the washer main body portion has the major axis direction aligned with the longitudinal direction. The washer for preventing metal piece adhesion of the road protection fence according to claim 5, wherein the washer can be fixed to the road. The washer for preventing metal piece adhesion of a road protection fence according to claim 5 or 6, wherein the outer periphery of the washer body is 3 mm or less in height. It consists of a synthetic resin or rubber having a substantially elliptical shape in which a notch is formed from the short axis direction with respect to a joint bolt having a head protruding to the roadway side in the longitudinal direction connection portion of the beam material of the road protection fence. And a washer body portion gradually raised from the outer periphery toward the notch, and a metal piece adhesion prevention method for a road protection fence. Through a washer main body made of synthetic resin or rubber having a substantially elliptical shape with a hole formed in the center of a joint bolt with a head protruding on the roadway side in the longitudinal direction connection portion of the beam material of a road guard fence A method of preventing metal pieces from adhering to road fences, characterized by being screwed together. In order to prevent the metal piece peeled off from the traveling vehicle in contact with the road protection fence from adhering to the joint bolt, the washer main body is fixed in a state in which the major axis direction of the washer main body is aligned with the longitudinal direction. The metal piece adhesion prevention method of the guard fence for roads of Claim 8 or 9. Prevention of adhesion of metal pieces peeled off from the traveling vehicle contacting the road protection fence to the joint bolt against the joint bolt with the head protruding to the roadway side in the longitudinal direction connection part of the beam material of the road protection fence In order to achieve this, a method for preventing the adhesion of metal pieces to a road protection fence, wherein at least the outer periphery of the road fence is covered with a caulking agent. The metal of the road protection fence according to any one of claims 8 to 11, wherein a joint portion of the beam material in which ends of the support fence portions of the road are overlapped with each other is covered with a caulking material. One-side adhesion prevention method.

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