JP2007002613A - Beam pipe connection structure of guard fence for road - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively prevent the adhesion of a metal strip flaked away from a traveling vehicle that contacts with a guard fence for a road such as a guard pipe. <P>SOLUTION: A bracket 11 having a protruded portion 26 formed thereon so as to progressively protrude forward from side edges 24 to a top center 25 is fixed to a support 41, and the fixed bracket 11 functions to support an inner sleeve 12, and projections longitudinally projecting from the bracket 11 are fit into ends of respective beam pipes 42. Then the beam pipes 42 are connected each other such that at least the top center 25 of the protruded portion 26 of the bracket 11 is protruded more forward than the peripheral surface of the beam pipes 42 and that the each side edge 24 of the protruded portion 26 is located at a height lower than the peripheral surface of each beam pipe 42. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a beam pipe connection structure of a road protection fence and a beam pipe connection method of 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 pipe. About.

  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 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 pipe arranged along the road shoulder is constructed so as to run in a belt shape facing the road, it is also useful as equipment for inducing a change in the road condition such as a sharp curve. In order to reduce nighttime traffic accidents, guard pipes have also been developed in which reflectors that efficiently reflect the light from the headlights are installed on the tops of the columns and the surface of the beam pipe.

  In general, a guard pipe is provided with a metal beam pipe having a steel property such as iron on pillars erected at a predetermined interval. FIG. 7 shows a connection structure 100 of the beam pipe 102 to the support column 103 in this conventional guard pipe. As shown in FIG. 7, the connecting structure 100 fixes a bracket 104 to the front side of the support column 103. Then, the inner sleeve 107 is fixed to the bracket 104 with a bolt 105 and a nut 106, and the end of the beam pipe 102 is fitted into a portion protruding to the left and right of the inner sleeve 107, and is fixed with the bolt 109 and the nut 110. It is a worn configuration.

By connecting the beam pipes 102 along the road in this way, it is possible to create a road guard fence with appropriate rigidity and toughness. The energy can be absorbed by the beam pipe 102 and the column 103.
Japanese Examined Patent Publication No. 4-66962 JP 2001-131917 A

By the way, recently, many cases of metal pieces adhering to guardrails in various parts of the country have been confirmed. Many of the guard pipes have not been confirmed, but the possibility of metal pieces adhering during a vehicle collision cannot be denied.

  If such a sharp metal piece protrudes from the guard pipe 10 to the road, a passerby traveling on the roadway with a bicycle or the like may come into contact with it and may be injured. For this reason, even if it is a case where a car collides with a guard pipe, improvement to the structure which can prevent adhesion of a metal piece is calculated | required.

  Conventionally, Patent Document 1 discloses a configuration that suppresses the occurrence of a gap in the overlapped joint portions of beam materials adjacent to each other. Further, Patent Document 2 proposes to eliminate the level difference of the beam joint of the bridge protection fence.

  However, in the disclosed technique of Patent Document 1, the beam material is focused on the assemblability and appearance, and in the disclosed technique of Patent Document 2, the focused position is focused on eliminating the step between the beam and the beam joint. It has been. For this reason, the disclosure techniques disclosed in Patent Documents 1 and 2 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 necessarily function effectively against this. .

  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 particular, there has been a need to devise a method that is as versatile as possible so that a large number of existing guard pipes 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 effectively attach metal pieces peeled off from a traveling vehicle that contacts a road guard fence such as a guard pipe. It is an object of the present invention to provide a beam pipe connection structure for a road protection fence and a beam pipe connection method for a road protection fence, which can be prevented in general.

  In the present invention, the bracket formed with the convex portion that is sequentially projected from the side end portion to the center of the top is fixed to the support column, the inner sleeve is supported by the fixed bracket, and is protruded in the longitudinal direction from the bracket. The protruding portion of the inner sleeve is fitted into the end of the beam pipe, and at least the center of the top of the convex portion of the bracket protrudes to the front side of the outer periphery of the beam pipe, and the side end thereof is equal to or less than the outer periphery of the beam pipe. The above-described problems are solved by connecting the beam pipes so that the height is as high as possible.

  That is, the beam pipe connection structure of the road guard fence according to the present invention is a road for connecting in the longitudinal direction the beam pipes whose ends are abutted with each other via the brackets with respect to the column constituting the road guard fence. In the beam pipe connection structure of the protective fence for the arm, the bracket is fixed to the support column, and is supported by the bracket, and the bracket formed with the convex portion that is sequentially projected from the side end portion to the center of the top portion. A protruding portion protruding in the longitudinal direction from the bracket, and an inner sleeve fitted into the end of the beam pipe, and the convex portion of the bracket has at least the center of the top when the beam pipe is connected. The side end of the beam pipe is shaped to be below the outer circumference of the beam pipe. It is.

  Further, the beam pipe connecting method of the road guard fence according to the present invention is a road for connecting in the longitudinal direction the beam pipes whose ends are butted against each other via a bracket with respect to the pillar constituting the road guard fence. In the beam pipe connecting method of the protective fence for the above, a bracket formed with a convex portion protruding sequentially from the side end portion to the center of the top is fixed to the support column, and the inner sleeve is supported by the fixed bracket, The protruding portion of the inner sleeve protruding in the longitudinal direction from the bracket is fitted into the end portion of the beam pipe, and at least the center of the top of the convex portion of the bracket protrudes to the front side from the outer periphery of the beam pipe, and the side end thereof The beam pipes are connected such that the height of the portion is equal to or less than the outer periphery of the beam pipe.

  In the present invention, the bracket formed with the convex portion that is sequentially projected from the side end portion to the center of the top is fixed to the support column, the inner sleeve is supported by the fixed bracket, and is protruded in the longitudinal direction from the bracket. The protruding portion of the inner sleeve is fitted into the end of the beam pipe, and at least the center of the top of the convex portion of the bracket protrudes to the front side of the outer periphery of the beam pipe, and the side end thereof is equal to or less than the outer periphery of the beam pipe. Connect the beam pipes so that

  For this reason, the gap between the bracket and the inner sleeve is located on the rear side of the outer peripheral surface of the beam pipe, and the metal piece peeled off from the traveling vehicle does not easily adhere to the gap between the bracket and the inner sleeve. It becomes possible. In addition, when the traveling vehicle comes into contact with the beam pipe connecting structure, it first comes into contact with the convex portion of the bracket, so that it is possible to further reduce the possibility of the metal piece peeling off.

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

  The beam pipe connection structure 1 to which the present invention is applied is represented by, for example, a guard pipe or the like, and is disposed on a road protection fence provided on a general road or an expressway. FIG. 1 is a perspective view of the overall structure of a road guard fence 4 on which the beam pipe connection structure 1 is disposed.

  The road protection fence 4 includes a column 41 standing along the road at a predetermined interval, and a metallic beam pipe 42 installed between the column 41. By connecting the beam pipe 42 along the road, it is possible to create a road guard fence with appropriate rigidity and toughness. Even when the traveling vehicle collides, the beam is protected against the impact. Energy can be absorbed by the pipe 42 and the column 41.

  Next, the structure of the beam pipe connection structure 1 applied to such a road guard fence 4 will be described.

  2 is a perspective view of the beam pipe connection structure 1, FIG. 3 is a front view thereof, and FIG. 4 is a side view thereof.

  The beam pipe connection structure 1 includes a bracket 11 that is fixed to the front side with respect to a support column 41, and an inner sleeve 12 that is supported by the bracket 11 in the longitudinal direction A in the figure.

  The bracket 11 is formed by bending a steel plate, and as shown in the side view of FIG. 3, the fixing surface 11a fixed to the support column 41 is formed to be substantially planar, and the front side Is formed in an arc shape according to the diameter of the inner sleeve 12. The bracket 11 is formed with an insertion hole (not shown) through which the bolt 13 is inserted. By aligning the insertion hole (not shown) with the insertion hole 45 of the support column 41, the bolt 13 is inserted through the insertion hole 45, and the screw portion tip is fixed with the nut 47, whereby the bracket 11 can be fixed to the support column 41. .

  The inner sleeve 12 is supported by being inserted into the bracket 11 and fixing its central portion with a bolt 16 and a nut 17. As a result, both ends of the inner sleeve 12 are protruded from the bracket 11 from the longitudinal direction. The protruding portions 12a and 12b thus protruded are fitted into the end portions of the beam pipe 42, and are further fixed by bolts 19 and nuts 20.

  FIG. 5 (a) is a perspective view showing only the bracket 11, and FIG. 5 (b) is a side view thereof. The bracket 11 is formed with a convex portion 26 that is sequentially projected from the side end portion 24 to the top center 25 to the front surface. When the bracket 11 in which such a convex part 26 is formed is fixed to the support column 41, as shown in FIGS. 1 to 3, the convex part 26 is fixed in a state where it bulges to the front side. Incidentally, the shape of the convex portion 26 may be formed in any shape, may have a curved bulge shape, or may be formed in a square shape.

  FIG. 6 is an enlarged front view of the vicinity of the convex portion 26 of the bracket 11 when the beam pipe 42 is connected. As shown in FIG. 6, when the beam pipe 42 is connected, the convex portion 26 of the bracket 11 has at least the center 25 at the top protruding from the front surface of the outer peripheral surface 42c of the beam pipe 42. The height is adjusted to be equal to or less than the outer peripheral surface 42c of the pipe 42.

  As a result, the gap between the bracket 11 and the inner sleeve 12 is positioned on the rear side of the outer peripheral surface 42c of the beam pipe. For this reason, it becomes possible to set it as the structure where the metal piece which peeled from the traveling vehicle cannot adhere to the clearance gap between the bracket 11 and the inner sleeve 12. FIG. In addition, when the traveling vehicle comes into contact with the beam pipe connection structure 1, it first comes into contact with the convex portion 11 of the bracket 11, so that the possibility that the metal piece peels can be further reduced.

It is a perspective view of the whole structure of the guard fence for roads by which the beam pipe connection structure to which this invention is applied is arrange | positioned. It is a perspective view of the beam pipe connection structure to which the present invention is applied. It is a front view of the beam pipe connection structure to which the present invention is applied. It is a side view of the beam pipe connection structure to which the present invention is applied. It is a figure which shows the detailed structure of the bracket in the beam pipe connection structure to which this invention is applied. It is a front enlarged view around the convex part of a bracket at the time of connection of a beam pipe. It is a figure which shows the connection structure to the support | pillar of the beam pipe in the conventional guard pipe. It is a figure for demonstrating about the case where a metal piece adheres to a guard pipe.

Explanation of symbols

1 Beam pipe connection structure 4 Guard fence 11 for road 11 Bracket 12 Inner sleeve 13 Bolt 16 Bolt 17 Nut 19 Bolt 20 Nut 24 Side end 25 Top center 26 Convex 41 Strut 42 Beam pipe 47 Nut

Claims (2)

In the beam pipe connection structure of the road protection fence for connecting the beam pipes whose ends are abutted with each other via the bracket to the support pillar constituting the road protection fence, in the longitudinal direction,
A bracket formed with a convex portion that is fixed to the support column and is sequentially projected from the side end portion to the center of the top portion.
An inner sleeve that is supported by the bracket and that has a protruding portion protruding in the longitudinal direction from the bracket and fitted into an end of the beam pipe;
The convex part of the bracket is formed such that at the time of connecting the beam pipe, at least the center of the top part protrudes to the front side from the outer periphery of the beam pipe, and the side end part thereof is not higher than the outer periphery of the beam pipe. A beam pipe connection structure for road protection fences. In the beam pipe connection method of the road protection fence for connecting the beam pipes whose ends are butted against each other via the bracket to the support pillar constituting the road protection fence,
From the side end portion to the center of the top, a bracket formed with a convex portion that is sequentially projected to the front is fixed to the support column,
The inner sleeve is supported by the fixed bracket,
Fit the protruding part of the inner sleeve protruding in the longitudinal direction from the bracket into the end of the beam pipe,
Further, the beam pipe is connected such that at least the center of the top of the convex portion of the bracket protrudes to the front side of the outer periphery of the beam pipe and the side end thereof is at a height equal to or lower than the outer periphery of the beam pipe. A beam pipe connection method for a road guard fence.

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