JP2015045162A - Guard fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guard fence, when impact force is added to the guard fence, for making the force dispersively act on the embedded whole anchor bolts.SOLUTION: A column 1 comprises: a plate-like baseplate 11 provided with an anchor bolt insertion hole 111 for inserting an anchor bolt A erected on an installation surface G; and a tubular column body 13 erected on an upper surface of the baseplate 11. The anchor bolt insertion hole 111 is respectively provided in a pair by two on the front side of becoming the roadway side and the rear side of its rear, and the rear side two anchor bolt insertion holes 111b are provided in a position where its center-connecting virtual line K passes through the column body 13, and a reinforcement part 14 fixed to an upper surface of the baseplate 11 is provided on a side surface of the column body 13 in a part for passing the virtual line K or in the rear of it.

Description

  The present invention relates to a protective fence that is installed on a road, a bridge, or the like, and in which a transverse beam is passed between columns that are installed at intervals on the installation surface.

  Conventionally, as a protective fence installed on a road or a bridge, for example, a horizontal beam body or a side wall between columns having a horizontal section H-shaped column main body standing on the upper surface of a base plate such as a base body or a base. A protective fence to which a transverse beam called a frame material is passed is disclosed, and in the horizontal cross-section H-type support body, reinforcing ribs are provided from the lower part of the rear side flange to the upper surface of the base plate. In addition, a through hole in which an anchor bolt standing on an installation surface such as a road surface is penetrated and fixed is provided in the base plate. (Patent Documents 1 and 2)

JP 2012-180646 A JP 2007-270556 A

  However, in the protective fence, two through holes through which the anchor bolts are inserted are provided between the front side flange and the rear side flange of the column main body with the web interposed therebetween, and the rear side of the rear side flange. In addition, since the two reinforcing ribs are provided, when an impact force is applied from the front side of the protective fence, such as a vehicle collision, the anchor bolt inserted through the two through holes on the front side is pulled. Since the force acts in the direction of pulling out, the pulling force also acts on the installation surface, and the anchor bolt inserted through the two through holes on the rear side also has the effect of the reinforcing ribs, in the compressing direction. Since the force acts, the compression force also acts on the installation surface. Therefore, since the impact force applied to the protective fence acts intensively only on the front anchor bolt, the force is intensively applied only to the part where the front anchor bolt is embedded even at the installation location. In particular, in an installation place where concrete has deteriorated over time, it is not preferable that a force is applied to a certain portion in a concentrated manner.

  The present invention is intended to provide a protective fence in which, when an impact force is applied to the protective fence, the force is distributed to all anchor bolts.

In order to achieve the above object, the present invention is configured as follows.
That is, the guard fence according to the present invention is a guard fence in which a lateral beam is passed between pillars installed at intervals on the installation surface, and the pillars are anchor bolts erected on the installation surface. A plate-like base plate provided with an anchor bolt insertion hole, and a tubular column main body erected on the upper surface of the base plate. The anchor bolt insertion hole includes a front side on the roadway side and a rear side thereof. The two rear side anchor bolt insertion holes are provided at positions such that a virtual line connecting the centers thereof passes through the column body, A reinforcing portion that is fixed to the upper surface of the base plate is provided on the side where the imaginary line passes or on the side surface of the column main body behind it.

  Further, in the guard fence according to the present invention, the rear two anchor bolt insertion holes may be provided at a position where an imaginary line connecting the centers passes through the front part from the center of the column main body. .

  In the protective fence according to the present invention, one reinforcing member may be provided so as to form a substantially I-shape in plan view from the side surface of the column main body to the rear side.

  Further, in the guard fence according to the present invention, two reinforcing portions may be provided so as to form a substantially V shape in a plan view from the side surface of the column main body to the oblique rear side.

  According to the guard fence according to the present invention, the support column is erected on a flat plate-like base plate provided with anchor bolt insertion holes through which anchor bolts erected on the installation surface are inserted, and on the upper surface of the base plate. The anchor bolt insertion holes are provided in pairs on the front side on the roadway side and the rear side behind the anchor bolt insertion holes, and the two anchor bolt insertion holes on the rear side. Is provided at a position where an imaginary line connecting the centers thereof passes through the column main body, and a reinforcing portion fixed to the upper surface of the base plate on a side where the virtual line passes or a side surface of the column main body behind it. Since the impact force caused by the collision of the vehicle is supported by the reinforcing part, the anchors inserted through the two base plate insertion holes on the roadway side are provided. Since not only the bolt but also the anchor bolt inserted through the two base plate insertion holes on the rear side is subject to the pulling force due to the impact force, it is concentrated on the two anchor bolts on the front side. The load on the installation surface can be distributed without any force acting.

  Further, according to the guard fence according to the present invention, the rear two anchor bolt insertion holes are provided at a position where an imaginary line connecting the centers passes through the front part from the center of the column main body. Therefore, the load on the installation surface can be further dispersed, which is preferable.

  Further, according to the guard fence according to the present invention, since the reinforcing portion is provided so as to form a substantially I shape in a plan view from the side surface of the column main body toward the rear side, The strength of the column main body can be improved.

  Further, according to the guard fence according to the present invention, since the two reinforcing portions are provided so as to form a substantially V shape in a plan view from the side surface of the column main body obliquely rearward, further shocks are provided. The strength of the column main body against the force can be improved, which is preferable.

BRIEF DESCRIPTION OF THE DRAWINGS (a) is the front view seen from the front side used as a roadway side, (b) is a top view, (c) is a side view which shows one Embodiment of the protection fence which concerns on this invention. The principal part of the support | pillar of the protection fence shown in FIG. 1 is demonstrated, (A) is a top view, (B) is a side view. It is a side view explaining the state which applied and applied the impact force to the protection fence of the form shown in FIG. The principal part of the support | pillar in another embodiment of the protection fence which concerns on this invention is demonstrated, (A) is a top view, (B) is a side view. The principal part of the support | pillar in another embodiment of the protection fence which concerns on this invention is demonstrated, (A) is a top view, (B) is a side view.

Next, embodiments for carrying out the present invention will be specifically described with reference to the drawings.
In the drawings, P is a protective fence according to the present invention, 1 is a support column installed at an interval on the installation surface G, and 2 is a through hole 15 formed in the rear side surface and the front side surface of the support column 1. It is a transverse beam made of a tubular steel pipe provided in three stages up and down on the support column 1 via a fitting T fixed to the front side surface of the support column 1 with a mounting bolt B inserted into the support column 1. In this specification, the roadway side of the installed protective fence P is the front side, and the opposite side is the rear side.

  The support column 1 is provided with a total of four anchor bolt insertion holes 111 through which the four anchor bolts A erected on the installation surface G are inserted, two on the front side and two on the rear side, respectively. A base plate 11 made of a horizontally long rectangular flat plate-like steel plate and a column main body 13 made of a tubular steel pipe standing on the upper surface of the base plate 11 and joined by welding are provided. A support cap 12 for concealing the inside of the support body 13 is attached to the upper end of the support body 13.

  The four anchor bolt insertion holes 111 are provided in pairs on the front side on the roadway side and the rear rear side thereof, and two anchor bolt insertion holes 111b on the rear side are provided. The virtual line K connecting the centers thereof is provided at a position where it passes through the column main body 13. That is, as shown in FIG. 2A, the virtual line K is parallel to the virtual line K and between the tangent line L1 passing through the front end of the column body 13 and the tangent line L2 passing through the rear end. Two anchor bolt insertion holes 111b on the rear side are provided in the base plate 11 so that is positioned. The two anchor bolt insertion holes 111a on the front side are provided on the front side of the tangent L1.

  In the embodiment shown in FIGS. 1 to 3, there are two reinforcing portions 14 made of a steel plate having a triangular shape in a side view, obliquely rearward from a portion where the virtual line K of the column main body 13 passes or a side surface behind the reinforcing portion 14. It is provided over the upper surface of the base plate 11 so as to form a substantially V shape in plan view, and is fixed by welding.

  The shape and number of the reinforcing portions 14 are not particularly limited as long as the reinforcing portions 14 are provided on a portion through which the phantom line K passes or on the side surface of the column main body 13 behind the imaginary line K. As in the embodiment, one reinforcing portion 14 made of a steel plate having a triangular shape in a side view is provided over the upper surface of the base plate 11 so as to form a substantially I shape in a plan view from the side surface of the column main body 13 toward the rear. It may be fixed by welding.

  Next, in the embodiment shown in FIG. 5, the two rear anchor bolt insertion holes 111 b are provided at positions where an imaginary line K connecting the centers passes through the front part from the center of the column main body 13. It has been. That is, as shown in FIG. 4 (a), between the tangent L1 passing through the front end of the column main body 13 and parallel to the straight line L3 passing through the center of the column main body 13 in parallel with the virtual line K, Two anchor bolt insertion holes 111b on the rear side are provided in the base plate 11 so that the virtual line K is located. The two anchor bolt insertion holes 111a on the front side are provided on the front side of the tangent L1.

  And in embodiment shown in FIG. 5, the said reinforcement part 14 is two, and the planar view substantially V shape is seen toward the back diagonally from the site | part through which the said virtual line K of the support | pillar main body 13 passes, or its back. As formed, it is provided over the upper surface of the base plate 11 and joined by welding.

  That is, in the above-described embodiment, the reinforcing portion 14 that is fixed to the upper surface of the base plate 11 is provided on the side where the virtual line K passes or on the side surface of the column main body 13 behind the imaginary line K.

  With the above configuration, as shown in FIG. 3, when an impact force F due to a vehicle collision or the like is applied from the front side of the protective fence P, the impact force F is also supported by the reinforcing portion 14. The pull-out force due to the impact force acts not only on the anchor bolt A inserted through the two front base plate insertion holes 111a but also on the anchor bolt A inserted through the two rear base plate insertion holes 111b. Therefore, the load on the installation surface G can be distributed without intensively acting on the two anchor bolts A on the front side.

  In the above-described embodiment, the support column 12 and the transverse beam 2 are made of a metal tube such as steel or aluminum, or are made from a material coated or coated with a synthetic resin on the outer periphery thereof. The cross-sectional shape is not particularly limited, such as a circle or a rectangle, and the shape of the reinforcing part is a triangular shape in side view, but is not particularly limited to a rectangle, a trapezoid, etc. Also in this point, the present invention can be implemented in various forms without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 support | pillar 11 base plate 111 anchor bolt insertion hole 111a front anchor bolt insertion hole 111b rear anchor bolt insertion hole 12 support cap 13 support body 14 reinforcement part 15 through hole 2 transverse beam P protective fence A anchor bolt B mounting bolt F impact Force K Virtual line T Joint fitting L1 Tangent L2 Tangent L3 Straight line

Claims (4)

  A protective fence in which a horizontal beam is passed between support columns installed at intervals on the installation surface, and the support columns are provided with anchor bolt insertion holes through which anchor bolts standing on the installation surface are inserted. A flat plate-shaped base plate and a tubular column main body standing upright on the upper surface of the base plate, and two anchor bolt insertion holes are provided on each of the front side on the roadway side and the rear side on the rear side. The two anchor bolt insertion holes on the rear side are provided at a position where an imaginary line connecting the centers passes through the column main body, and a part through which the imaginary line passes or behind A protective fence characterized in that a reinforcing part fixed to the upper surface of the base plate is provided on a side surface of the column main body.   2. The two anchor bolt insertion holes on the rear side are provided at positions where an imaginary line connecting the centers thereof passes through a front portion from the center of the column main body. Guard fence.   3. The protective fence according to claim 1, wherein one reinforcing portion is provided so as to form a substantially I-shape in a plan view from the side surface of the column main body toward the rear side. 4.   3. The protective fence according to claim 1, wherein two reinforcing portions are provided so as to form a substantially V shape in a plan view from the side surface of the column main body obliquely rearward.

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