JP2010101078A - Guard fence for road - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guard fence for a road which is formed in a shape excellent in the design performance of a structure in which a support directly receives an impact force caused by a collision of a vehicle. <P>SOLUTION: The guard fence for the road includes a plurality of circular cross section supports 1, a cap 22, a bracket 20, and a beam pipe 21 while a top surface of the cap 22 is formed of a flat portion 22e and an inclined plane portion 22f. The bracket 20 is attached by means of a common bolt 26 which passes through both the support 1 and the cap 22 toward a roadway side from the other side of a roadway. An upper end of the bracket 20 is inclined upward toward a top surface of the beam pipe 21. The beam pipe 21 is fitted and connected to both ends of an inner sleeve 24, arranged on the roadway-side front surface of the bracket 20, and coupled to the bracket 20 by means of a bolt 29 screwed in a centripetal direction from a lower portion on the other side of the roadway. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention belongs to the technical field of road protection fences constructed by attaching beam pipes in a plurality of stages in the vertical direction to the roadway side of a column that is set up at intervals along the road.

  Since the Ministry of Land, Infrastructure, Transport and Tourism's “Guidelines for Maintenance-Sensing Guard Fences” were announced, many structures that emphasize design as well as functionality have been proposed and adopted for road fences.

Among these, for example, the inventions of the following Patent Documents 1 and 2 have been proposed, and there are actually several road protection fences installed on the road.
11A and 11B show the invention described in Patent Document 1 and an example thereof. The uppermost beam pipe 9 is attached by an inclined cap 2 attached to the upper end of the column 1 and a similar inclined bracket 4. The lower beam pipe 9 'is attached by a horizontal bracket 4'.

  Next, FIG. 12 shows the invention described in Patent Document 2 below. The uppermost beam pipe is attached at a position higher than the cap 12 that covers the upper end of the column 1. As a means for this, the top surfaces of the cap 12 and the bracket 14 that are placed on the upper end of the support column 1 are formed in a steeply rising front inclined surface from the sidewalk side toward the roadway side. The cap 12 is attached to the upper end of the column 1 with a bolt 13.

Japanese Patent No. 3998210 JP 2003-176513 A

Each of the road guard fences according to the inventions described in Patent Documents 1 and 2 above has a structure in which the top beam pipe is attached with a bracket inclined further upward from the upper end of the column, and the top of the column is hidden from the line of sight. It is a protective fence that is in harmony with the surrounding landscape due to its smart design.
However, in the case of the inventions described in Patent Documents 1 and 2, the bracket 4 or 14 is configured to be attached using the cap 2 that covers the upper end of the support 1 and the bracket that is directly attached to the lower stage of the support 1. (For example, refer to 4 ′ in FIG. 11B), the configuration is different, and different brackets must be prepared and used.

The object of the present invention is that the upper end of the support column and the upper end (top surface) of the upper beep pipe are substantially the same height, and the support column directly receives the impact force caused by the collision of the vehicle. The object of the present invention is to provide a road protection fence having a shape that is excellent in design without simply forming the upper end in a straight line.
The next object of the present invention is to make it possible to use the upper and lower brackets to which the beam pipe of the protective fence is attached in common, so that the construction can be facilitated and the advantages in terms of production can be obtained. Is to provide a protective fence for roads.

As means for solving the above-described problems, a road guard fence according to the invention described in claim 1 is:
In a road guard fence composed of a plurality of pillars having a circular cross section, a cap covering the upper end of the pillar, a bracket attached to the roadway side of the pillar, and a beam pipe attached to the bracket,
The upper surface of the cap that covers the upper end of the support column has a flat part on the same plane from the end opposite to the roadway toward the roadway side, and an inclined surface part that slopes downward from the roadway side end of the flat part toward the bracket mounting part. And formed with
The bracket is attached with a common bolt in which a cap covering the column and the column upper end is penetrated from the opposite side to the roadway side,
The upper end of the bracket is inclined upward toward the top surface of the beam pipe attached to the bracket,
The beam pipe is fitted and connected to both ends of the inner sleeve, and is arranged on the front surface of the bracket on the side of the roadway, and is connected to the bracket by a bolt screwed in the centripetal direction from the lower part on the opposite side of the roadway.

The road fence according to the invention described in claim 2 is:
In the protective fence where the brackets are attached at intervals in the vertical direction to the roadway side of the column with a circular cross section standing at intervals along the road, and the beam pipe is attached to each bracket,
A cap is attached to the upper end of the support column, and the cap includes an upper surface part covering the upper end of the support column and a skirt part bent downward from the upper surface part,
The upper surface portion of the cap has a semicircular shape in which about half of the side opposite to the roadway is inscribed in almost half of the column,
About half of the cap on the roadway side, the straight part (bracket mounting part) that attaches the bracket to the front end of the roadway circumscribes the front end of the column, and this bracket mounting part and both ends of the semicircular shape extend in the tangential direction. It is a corner part with a cut between the straight extension part,
The upper surface portion surrounded by the semicircular portion of the cap and the linear extension portion extending in the tangential direction from both ends of the semicircular portion is the same plane, and the upper surface portion is surrounded by the corner portion and the bracket mounting portion. Is an inclined surface that goes down toward the bracket mounting part,
The bracket mounting portion is a straight line parallel to the extending direction of the beam pipe when viewed in plan,
A bolt is passed substantially horizontally from the opposite side of the roadway to the side of the roadway at a position near the upper end of the column with the cap, which also penetrates the bottom of the cap in common. On the roadway side, a bracket that is in contact with a bracket mounting portion on the roadway side front end of the cap is attached with a nut screwed into the bolt,
The bracket includes a mounting surface portion that is in contact with the bracket mounting portion at the front end on the roadway side of the cap in a plane, includes a support portion of a beam pipe that protrudes from the mounting surface portion to the roadway side, and when the beam pipe support portion is viewed in plan view, It is expanded to a shape that spreads toward the roadway centering on the mounting surface, and has a substantially U shape that opens downward when viewed in the cross-sectional direction of the beam pipe, and a front surface protruding toward the roadway is a circle that closely contacts the beam pipe Formed in an arc-shaped beam pipe support,
The beam pipe fitted and connected to the outer circumference of the inner sleeve is connected to the inner sleeve with a bolt screwed in the centripetal direction from the lower part on the opposite side of the roadway, and is further in close contact with the beam pipe support part of the bracket to support the beam pipe It is characterized by being connected to the bracket by a bolt penetrating the portion from the back side.

The invention described in claim 3 is the road fence according to claim 2,
The bracket mounting portion at the front end of the cap on the roadway side and the mounting surface portion of the bracket that contacts the bracket mounting portion in a plane are formed as flat portions of the same shape and size, respectively.

  In the road guard fence of the present invention, the upper surface portion of the cap 22 covering the upper end of the support column 1 is a flat portion on the same plane from the opposite side of the roadway to the roadway side, and from the roadway side end of the flat part to the bracket mounting portion. In the plan view, about half of the opposite side of the roadway is a semicircular shape in which almost half of the column is inscribed, and the other half of the roadway side is at the front end of the roadway side. The bracket mounting part, which is a flat part to which the bracket is attached, circumscribes the front end of the support column, and the bracket part is a corner part with a corner cut between the semicircular both ends extending in the tangential direction. The upper surface surrounded by the semicircular portion of the cap and the linear extension portion extending tangentially from both ends of the semicircular portion is the same plane, and the upper surface surrounded by the corner portion and the bracket mounting portion Facing the bracket mounting Since the bracket mounting portion is configured in a straight line parallel to the extending direction of the beam pipe when viewed in plan, the shape of the bracket 22 narrows toward the roadway when the cap 22 is looked down. It presents a visual impression of a smart and small form, and its presence at the line of sight is small and inconspicuous.

  The bracket 20 also includes a flat mounting surface portion 20a that is in contact with the bracket mounting portion 20a at the front end on the roadway side of the cap 22 in a plane, and the beam pipe support portion 20b protruding from the mounting surface portion 20a to the opposite roadway side is planar. When viewed in the cross-sectional direction of the beam pipe 21, the beam pipe 21 has a substantially U-shape opening downward, with the front surface protruding toward the roadway being the beam pipe. Since it is formed on the arcuate beam pipe support portion 20b to be in close contact with each other, even when the bracket 20 is looked down on, the shape is narrowed to the opposite side of the roadway, so that a smart and small visual impression is obtained. The presence at is small and not noticeable (see FIGS. 2 and 3).

Since the top surface of the uppermost beam pipe 21 attached to the beam pipe support portion 20b of the bracket 20 has a height substantially equal to the upper surface of the cap 22 attached to the upper end of the column 1, it can be seen from the roadway side. Even when viewed from the opposite side (usually the sidewalk side), it has a clean design and is excellent in scenery in harmony with the surrounding environment.
In addition, the bracket 20 can be used not only for mounting the uppermost beam pipe 21 but also for mounting the lower beam pipe 21, including a bolt 26 and a nut 27 for mounting the bracket 20 to the column. The inner sleeve 24 and the beam pipe 21 can all be used in common. Therefore, unlike the inventions of the above-mentioned prior Patent Documents 1 and 2, the components of the road guard fence are common to the beam pipes 21 at each stage, and it is not necessary to use them according to the mounting height of the beam pipes 21. . Moreover, unlike the standard type of protective fences used so far, it is not necessary to use different brackets depending on the end column and the intermediate column.
In this way, the structural members of the road protection fence can be made common, and the management of the structural members can be facilitated as the number of varieties is small, and the cost can be reduced. And, by repeating the common assembly procedure and work, the installation work of the protective fence can be efficiently advanced, and the quality control of the installed protective fence can be facilitated and advanced.

A road guard fence is composed of a plurality of pillars 1 having a circular cross section, a cap 22 covering the upper end of the pillar 1, a bracket 20 attached to the roadway side of the pillar 1, and a beam pipe 21 attached to the bracket 20. To do.
The cap 22 that covers the upper end of the support column 1 has a flat portion 22e on the same plane from the opposite side to the roadway, and a portion of the flat portion 22e from the roadway side end to the bracket mounting portion 22a is inclined downward. It forms in the inclined surface part 22f.
The bracket 20 is attached to the support 1 with a common bolt 26 together with the support 1 and a cap 22 covering the upper end of the support 1.
The upper end 20 e of the bracket 20 is inclined upward toward the top surface of the beam pipe 21 attached to the bracket 20.
The beam pipe 21 is fitted and connected to both ends of the inner sleeve 24, is arranged on the front surface of the bracket 20 on the roadway side, and is coupled to the bracket 20 with a bolt 25 screwed in a centripetal direction from a lower portion opposite to the roadway.

Next, the present invention will be described based on the illustrated embodiment.
1A, B and 2 show an embodiment of a road guard fence according to the present invention.
Brackets 20 are attached to the brackets 20 at intervals in the vertical direction on the side of the roadway of the pillars 1, 1... With a plurality of circular cross sections standing at intervals along the road, and the beam pipes 21 are attached to the brackets 20. Yes. The upper end of the column 1 is covered with a cap 22. In this embodiment, the beam pipes 21 are mounted in three stages at equal intervals in the vertical direction of the support column 1.

The form of the cap 22 according to the present invention will be described. As shown in FIGS. 3 to 6, the cap 22 includes an upper surface portion covering the upper end of the support column 1 and a skirt portion (circumferential side surface portion) bent downward from the upper surface portion. The upper surface portion of the cap 22 has a semicircular shape in which approximately half of the column 1 having a circular cross section is inscribed on the side opposite to the roadway, and about half of the cap 22 on the roadway side is the front end of the roadway side. A bracket mounting portion 22 a for mounting the bracket 20 is formed as a flat portion circumscribing the front end of the column 1. A corner portion 22c is formed between the bracket mounting portion 22a and a straight extension portion 22b obtained by extending both ends of the semicircular shape in a tangential direction.
An upper surface portion 22e surrounded by a semicircular portion of the cap 22 and a linearly extending portion 22b extending in a tangential direction from both ends of the semicircular portion is coplanar, and the corner portion 22c and the bracket attaching portion 22a The upper surface portion 22f surrounded by is an inclined surface that goes down toward the bracket mounting portion 22a. When the bracket mounting portion 22a is viewed in plan, it is a straight line parallel to the extending direction of the beam pipe 21.

  Bolts 26 are positioned substantially horizontally from the opposite side of the roadway to the roadway side at positions near the upper end of the support column 1 with the cap 22 having the above-described configuration on the upper end and penetrating the skirts of the caps in common. The bracket 20 that contacts the bracket mounting portion 22a at the front end of the cap road 22 is attached to the end of the bolt 26 with a nut 27 screwed into the bolt 26. Therefore, the bracket mounting portion 22a of the cap 22 is provided with one bolt hole 22d through which the bolt 26 is passed at the center.

As shown in FIGS. 7A and 7B, the bracket 20 includes a mounting surface portion 20a that contacts the bracket mounting portion 22a at the front end of the roadway side of the cap 22 in a plane, and a bolt hole 20c through which the bolt 26 passes is also provided in the mounting surface portion 20a. One is provided in the section. The bracket 20 includes a beam pipe support portion 20b that protrudes in a U-shape downward when viewed in the side direction from the mounting surface portion 20a to the roadway side.
The beam pipe support portion 20b is enlarged in a shape that spreads toward the roadway centering on the mounting surface portion 20a so that FIG. When viewed in the cross-sectional direction of the beam pipe 21 (the direction of FIG. 6), the arc-shaped beam pipe support portion is formed in a substantially U shape that opens downward, and the front surface protruding toward the roadway closes the beam pipe. 20b. The arc shape of the beam pipe support portion 20b is formed with a radius of curvature substantially the same as the outer diameter of the beam pipe 21, and bolts are provided in two diagonal positions on the lower half side of the beam pipe 21 in the diagonally upward direction (see FIGS. 6 and 7A). A hole 20d is provided.

As an auxiliary tool for attaching the bracket 20 to the support column 1 and attaching the beam pipe 21 in a highly stable state, an inner member 23 shown in FIGS. 8A and 8B is used. The inner member 23 includes a flat surface portion 23a that is inscribed in the inner surface of the mounting surface portion 20a of the bracket 20, and the flat surface portion 23a also has an approximately coincident center with the bolt hole 20c provided in the mounting surface portion 20a of the bracket 20. Bolt holes 23c having the same diameter are provided.
When the inner member 23 is viewed in a plan view, it has both side surfaces 23d and 23d having a U-shape as shown in FIG. 8B. The front edge 23b of each side surface portion 23d has a beam pipe support portion 20b formed in an arc shape on the roadway side of the bracket 20 when the flat surface portion 23a is inscribed in the inner surface of the mounting surface portion 20a of the bracket 20. The side surfaces 23d and 23d function as reinforcing ribs that support the beam pipe support 20b from the back.
The inner member 23 has bolt holes 20d provided at two left and right positions in the lower half of the beam pipe support portion 20b of the bracket 20 so that the outer space between both side surface portions 23d and 23d arranged in the longitudinal direction of the beam pipe 21 is. , 20d, which is narrower than the inner method. More specifically, the internal space between the side surface portions 23d and 23d is the same as the space between two parallel sides of a hexagon nut 27 (or a square nut) that is fastened to the bolt 26 in order to attach the bracket 20. The nut 27 is allowed to enter and exit, but is configured with an interval to stop the common rotation.

In short, the work of attaching the bracket 20 to the support column 1 is performed by pressing the inner member 23 into the bracket 20 in advance through the opening on the lower side thereof, and attaching the flat surface portion 23a to the inner surface of the mounting surface portion 20a of the bracket 20. The center of both bolt holes 20c and 23c are made to coincide with each other. Thus, the front edges 23b of the side surface portions 23d and 23d of the inner member 23 are in a state of being inscribed in the back side (inner side surface) of the beam pipe support portion 20b. A nut 27 is inserted between the side surface portions 23d and 23d of the inner member 23 thus press-fitted.
Then, the upper end of the support column 1 and the skirt of the cap 22 covering the upper end are passed through the bolt 26 substantially horizontally from the opposite side of the roadway toward the roadway side, and the tip of the bolt 26 is connected to the front end of the cap 22. By passing the bolt 26 through the bolt hole 22d of the bracket mounting surface portion 22a and the bolt hole 23c of the flat surface portion 23a of the inner member 23 and further matching the screw hole of the nut 27, the bolt 26 is rotated on the head side, The nut 27 and the bolt 26 are fastened, and the bracket 20 can be attached and fixed to the top of the column 1.

   After the above operation is completed, the beam pipes 21 are fitted to the outer circumferences at both ends of the inner sleeve 24, and the butt joints K of the left and right beam pipes 21, 21 are in the length direction of the inner sleeve 24 as shown in FIG. Connect as much as possible to the center of the. Then, the bolt 25 is screwed obliquely upward in the centripetal direction of the inner sleeve 24 from the lower part on the back side opposite to the roadway side, and the inner sleeve 24 and the beam pipe 21 are firmly fixed. Then, the beam pipe 21 is applied to the beam pipe support 20b of the bracket 20, and a bolt 29 is screwed in the centripetal direction of the inner sleeve 24 from the back side of the beam pipe support 20b (see FIG. 4). The beam pipe 21 is firmly fastened to the bracket 20 together with the inner sleeve 24.

Assuming the above connection and mounting operations, the inner sleeve 24 has an outer diameter (40 mm in the illustrated example) with which the beam pipe 21 is closely circumscribed as shown in FIGS. 6 and 9, and a length of about 260 mm. It is constructed as a steel pipe.
On the other hand, the illustrated beam pipe 21 is a steel pipe having an outer diameter of about 48 mm, an inner diameter of 44 mm, and a unit length of about 3 m.
As shown in FIG. 6, the beam pipe support 20b of the bracket 20 has an upward angle indicated by a center line a diagonally upward in the centripetal direction of the inner sleeve 24 from the lower part on the back side, and the length shown in FIG. Two bolt holes 24a (or screw holes) are formed on both sides of the center line in the vertical direction, and the bolts 29 are screwed into the bolt holes 24a (or screw holes). Further, one bolt hole 24b (or screw hole) is provided at both outer positions at intervals, and the bolt 25 is screwed into the bolt hole 24b.
In addition, as shown in FIG. 6, each bolt hole 24c (or screw hole) is just two bolts on both sides at an upward angle indicated by a center line C that is substantially vertically upward from a position almost directly below. It is provided at an intermediate position between the holes (or screw holes) 24a and 24b. The reason why the above-mentioned bolt holes or the screw holes are parenthesized is that when the nut is welded to the inside of the inner sleeve 24, it can be implemented as a mere bolt hole, and when the nut is not welded, It means to carry out.

  On the other hand, as shown in FIGS. 10A and 10B, the beam pipe 21 is arranged so as to coincide with the bolt holes 20 d of the bracket 20 and the bolt holes 24 a to 24 c of the inner sleeve 24. Each bolt hole 21a-21c is provided.

  The beam pipes 21 and 21 that have been connected to the inner sleeve 24 and joined by bolting as described above are brought into close contact with the beam pipe support portion 20b of the bracket 20 and shown in FIG. The bolts 29 are fastened to be attached to the bracket 20 and eventually to the column 1.

As shown in FIGS. 3, 4, and 6, the road fence according to the present invention configured as described above has a top surface of the uppermost beam pipe 21, and an upper surface of the cap 22 attached to the upper end of the column 1. The height of the vehicle is almost equal, and the occupant of the vehicle traveling on the roadway side has an effect of hiding the upper end of the support column 1 with respect to the line of sight.
On the other hand, on the line of sight of a passerby walking on the side opposite to the roadway, the cap 22 that covers the upper end of the column 1 is formed into a tapered polygon on the roadway side, and narrows toward the roadway side. Because of its shape, it presents a smart and compact visual impression. In addition, the bracket 24, on the contrary, has a shape that expands from the mounting surface portion 20a in contact with the bracket mounting portion 22a at the front end of the cap 22 toward the roadway so as to widen toward the roadway, and the beam pipe support portion 20b for mounting the beam pipe 21 Since it is an arc shape, when looking down on this, it is a shape that narrows toward the bracket mounting portion 22a, contrary to the cap 22, so as a combination effect with the cap 22, it presents a smart and compact visual impression, Because the presence of is small and inconspicuous, the scenery is good.

  Furthermore, the road guard fence according to the present invention has an upper surface of the cap 22 that is placed on the upper end of the column 1 as shown in a comparison between FIGS. A portion extending from the end of the straight line to the end of the roadway is an inclined surface 22e that extends from the sidewalk side toward the roadway side. The undulation effect formed on the inclined surface 22f that descends toward the side further enhances the smart and compact visual impression.

The mounting structure of the beam pipe 21 that constitutes the road guard fence of the present invention includes a plurality of brackets 20, inner sleeves 24, and beam pipes 21 that are mounted at intervals in the vertical direction on the roadway side of the column 1 as well as bolts 26 and nuts. 27 and other bolts 25, 28, 29 can be used in common. Therefore, there is no inconvenience of using each component according to the height of the installation position of the beam pipe 21.
In this way, the constituent members can be made common, management of the constituent members becomes easier as the number of varieties is smaller, and the cost can be reduced by the amount of fewer varieties. And, by repeating the same assembling procedure and work, the installation work of the protective fence can be proceeded efficiently, and the quality control can be facilitated and sophisticated.

  Although the present invention has been described based on the illustrated embodiment, the technical scope of the present invention is not limited to the above-described embodiment. It should be noted that various embodiments are possible with design changes and other application areas that are required by those skilled in the art.

A and B show a protective fence according to the present invention, and are a plan view and an elevation view. It is sectional drawing of the II-II line | wire arrow of FIG. 1B. It is the perspective view which looked down at the III section of Drawing 1B. It is the perspective view which looked down at the back side of FIG. A is a perspective view showing a cap, and B is a plan view combining a bracket. It is sectional drawing to which the VI section of FIG. 2 was expanded. A is a side view showing a partially broken bracket, and B is a perspective view. A is a side view showing a partially broken inner member, and B is a perspective view. It is the rear view which showed the inner sleeve in the combined state with the beam pipe. A is a rear view of the beam pipe, and B is a side view. A is a cross-sectional view showing the main part of a conventional guard fence from the same viewpoint as FIG. 6, and B is an overhead view of the same part. It is sectional drawing which showed the principal part of the conventional different protection fence from the viewpoint similar to FIG.

Explanation of symbols

1 support 20 bracket 24 inner sleeve 21 beam pipe 22 cap 22a bracket mounting portion 22b linear extension portion 26 bolt 27 nut 20a mounting surface portion 20b beam pipe support portion 25, 28, 29 bolt 22e cap upper surface portion (flat portion)
22f Cap upper surface (inclined surface)

Claims (3)

In a road guard fence composed of a plurality of pillars having a circular cross section, a cap covering the upper end of the pillar, a bracket attached to the roadway side of the pillar, and a beam pipe attached to the bracket,
The upper surface of the cap that covers the upper end of the support column has a flat portion on the same plane from the end opposite to the roadway to the roadway side, and an inclined surface portion that slopes downward from the roadway side end of the flat portion toward the bracket mounting portion. And formed with
The bracket is attached with a common bolt that penetrates the support and the cap covering the upper end of the support from the opposite side of the roadway toward the roadway side,
The upper end of the bracket is inclined upward toward the top surface of the beam pipe attached to the bracket,
The beam pipe is fitted and connected to both ends of the inner sleeve, is arranged on the front surface of the bracket on the side of the roadway, and is connected to the bracket by a bolt screwed in the centripetal direction from the lower part opposite to the roadway. Guard fence for road. In the protective fence where the brackets are attached at intervals in the vertical direction to the roadway side of the column with a circular cross section standing at intervals along the road, and the beam pipe is attached to each bracket,
A cap is attached to the upper end of the support column, and the cap includes an upper surface part covering the upper end of the support column and a skirt part bent downward from the upper surface part,
The upper surface portion of the cap has a semicircular shape in which about half of the side opposite to the roadway is inscribed in almost half of the column,
About half of the cap on the roadway side, the straight part (bracket mounting part) that attaches the bracket to the front end of the roadway circumscribes the front end of the column, and this bracket mounting part and both ends of the semicircular shape extend in the tangential direction. It is a corner part with a cut between the straight extension part,
The upper surface portion surrounded by the semicircular portion of the cap and the linear extension portion extending in the tangential direction from both ends of the semicircular portion is the same plane, and the upper surface portion is surrounded by the corner portion and the bracket mounting portion. Is an inclined surface that goes down toward the bracket mounting part,
The bracket mounting portion is a straight line parallel to the extending direction of the beam pipe when viewed in plan,
A bolt is passed substantially horizontally from the opposite side of the roadway to the side of the roadway at a position near the upper end of the column with the cap, which also penetrates the bottom of the cap in common. On the roadway side, a bracket that is in contact with a bracket mounting portion on the roadway side front end of the cap is attached with a nut screwed into the bolt,
The bracket includes a mounting surface portion that is in flat contact with the bracket mounting portion at the front end of the cap on the roadway side, includes a beam pipe support portion that protrudes from the mounting surface portion toward the roadway side, and the beam pipe support portion is viewed in plan view. The shape is widened toward the roadway with the mounting surface as the center, and has a substantially U-shape opening downward when viewed in the cross-sectional direction of the beam pipe, and the front surface protruding toward the roadway closely contacts the beam pipe. Be formed on an arc-shaped beam pipe support,
The beam pipe fitted and connected to the outer circumference of the inner sleeve is connected to the inner sleeve with a bolt screwed in the centripetal direction from the lower part on the opposite side of the roadway, and is further in close contact with the beam pipe support part of the bracket to support the beam pipe A road guard fence characterized by being connected to a bracket by a bolt penetrating a part from the back side.   The bracket mounting portion at the front end on the roadway side of the cap and the mounting surface portion that is in contact with the bracket mounting portion in a plane in the bracket are formed as flat portions having the same shape and the same size, respectively. Guard fence for road.

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