JP2001123422A - Protective fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent such a danger that bolt head sections of beam pipe fixing bolts of a protective fence and nuts screwed to the bolts are protruded on the footpath side outer walls of poles to hurt pedestrians by collision or to damage clothes or belongings by hooking. SOLUTION: A groove-like or cavity-like recess 11 is formed on the side face of each pole 1 on the opposite side to the beam pipe installation side of the protective fence suspended with beam pipes 2 on the side face of the pole 1 to deform the pole 1 in shape, thereby the bolt head sections of the fixing bolts 3 inserted and fixed in the recess 11 and the nuts screwed to the bolts 3 are stored in the recess 3 of the pole 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective fence used at a boundary between a sidewalk and a road.

[0002]

2. Description of the Related Art Conventionally, a protective fence used at the boundary of a sidewalk has a beam pipe provided on the side of the road, and the beam pipe is fixed to the column by bolts and nuts penetrating the column. However, such a protective fence has a risk of injury due to pedestrians being caught or clothes or belongings being caught by the bolt head or nuts screwed to the bolts protruding from the side wall on the sidewalk side of the pillar, and there is a danger of being damaged. In addition, even when the bolt head and the nut are exposed on the roadway side, the contact with the bicycle and the damage to the contacted vehicle are increased.

[0003]

In order to improve the above-mentioned dangerous guard fence, the present applicant succeeded in solving the above-mentioned drawbacks and completing the present invention by changing the shape of the pillar of the guard fence. Reached.

[0004]

That is, in the protective fence of the present invention, a beam pipe is provided on the road side of the support, and a recess is formed on the side wall of the support on the sidewalk side, and is penetrated by a bolt hole formed in the recess. The beam pipe is fixed to the support by the bolt, and the head of the bolt or the nut screwed to the bolt is set in the recess of the support.

Further, in the protective fence of the present invention, the recess is formed in a groove shape along the outer wall on the sidewalk side of the support.

Further, in the protective fence of the present invention, the concave portion is formed in a concave shape which is narrowed at each beam pipe mounting position on the outer wall of the pillar on the sidewalk side.

Further, the protective fence of the present invention can be applied in exactly the same manner even if the above-mentioned setting of the side of the road and the side of the sidewalk are reversed.

Further, the protective fence according to the present invention is one in which a reflector is attached to an outer wall of a column of the protective fence according to any of the above.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a guard fence according to the present invention. In the figure, 1 is a column, 2 is a beam pipe, 3 is a bolt, and 4 is a retroreflector.

The column 1 is made of a tubular body such as a steel pipe, a synthetic resin-coated steel pipe or an aluminum pipe, and has a diameter of about 40 to 90 mm and a height of about 600 to 1500 mm. Although the surface may be smooth, it may be finished with a decorative finish such as wood-like unevenness.

A recess 11 is formed on the side wall of the pillar 1 according to the present invention on the sidewalk side, and the recess 11 has a groove shape along the height direction of the side wall of the side wall of the pillar 1 as shown in FIG. Alternatively, as shown in FIG. 2, it may be formed into a concave shape that is narrow at each beam pipe mounting position formed on the side wall on the sidewalk of the column 1. The depth of the recess 11 may be such that a nut to be described later is buried, and the width of the recess 11 may be a dimension operable by tools for fastening the nut.

As a method of forming the concave portion 11 of the column 1, in the case of a groove along the height direction of the column 1 as shown in FIG. 1, roll forming using a steel plate material or circular (or square) ) Re-roll forming, in which the support is narrowed down and formed by a roll, or extrusion or pultruding using an aluminum alloy or the like is applied. Further, in the case of the concave portion 11 in which the outer wall side surface of the column 1 is constricted as shown in FIG. 2, the concave portion 11 is formed by deforming the outer wall side surface of the column 1 by press molding.

The beam pipe 2 is made of a tubular body such as a steel pipe, a synthetic resin-coated steel pipe, an aluminum pipe, or the like, like the column 1. Also, the beam pipe 2 may be provided with a decorative finish such as wood-skin-like unevenness, and the diameter thereof is approximately 30 to 70.
mm.

The connection between the support 1 and the beam pipe 2 is fixed to the side wall of the support 1 on the roadway side by bolts and nuts via joint fittings 21 as shown in FIG. 2B. That is, the bolt 3 penetrates the column 1 from the bolt hole 12 formed in the concave portion 11 of the column 1 and the joint fitting 2
A nut 31 is screwed into a tip of a bolt 3 protruding from a bolt hole 22 formed in the first fitting 1 to connect the beams 2 to the fitting 2.
The joint fitting 22 supported through the support 3 is fixed to the column 1. Here, if the bolt head of the bolt 3 protruding into the concave portion 11 is set to fit within the depth of the concave portion 11,
It is preferable that pedestrians and objects do not touch the bolt head of the bolt 3.

In FIG. 2, the fixing with the bolt head facing the sidewalk has been described. However, depending on the form of the fitting, the bolt head and the nut are oriented in completely opposite directions. It may be fixed in a state. Furthermore, as shown in FIG. 3, the beam pipe 2 may be attached to the column 1 via a joint fitting 21 having a nut 23 to which the tip of the bolt 3 is screwed and fixed.

In the above description, a beam pipe is provided on the roadway side of the protective fence used at the boundary of the walkway, and the beam pipe is fixed to the column by bolts penetrating the column. As described in detail, for example, in the case of a form in which a handrail for pedestrians is provided at the top of the protective fence, a beam pipe may be provided on the sidewalk side, and the side where the beam pipe is provided for the support column The present invention can be applied in exactly the same manner, even if the setting of the mounting state is the reverse of the setting for the roadway side and the sidewalk side. And even in the case where the bolt head and nut are exposed on the roadway side, it is possible to prevent a person riding the bicycle from being caught and injured, or even if the vehicle touches the protective fence, Damage is reduced.

The retroreflector 4 is attached to the outer wall of the column 1, and has an air layer on the front surface of the reflector, and has a lens body such as a large number of triangular pyramidal projections made of resin such as polycarbonate or acrylic. , The prism type reflector 41 on which AB is disposed
A glass bead-type reflector 42 in which a large number of glass bead reflectors 44 having a mirror-finished bottom surface formed on a small glass sphere based on a base 43 made of a synthetic resin such as S or rubber or a rubber are semi-buried. , And other brilliant sheets are used. Normally, a sheet type is stuck in an annular or height direction along the outer wall of the column 1, or a prism type reflector or a glass bead type reflector is provided on the column 1 by tacking, bonding or the like. The retroreflector 4
May be provided near the upper end of the column 1, or may be provided slightly above the ground surface. In addition, as shown in FIG. 4, when the retroreflector 4 is attached by being fitted into the concave surface 14 formed on the smooth surface 13 formed on the column 1 or in the vertical direction of the outer wall, for example, at the time of installation, It is preferable that the reflector can be attached by simple construction such that the reflector is opposed to the incident light X shown in FIG.

[0018]

As described above in detail, in the protective fence according to the present invention, the beam pipe is fixed by the bolt penetrating the bolt hole formed in the recess formed in the side wall on the sidewalk side of the column, and the head of the bolt is provided. Since the nuts screwed to the parts or bolts are accommodated in the recesses of the pillars, even if people walking on the sidewalk touch the pillars, they do not touch the bolt heads and nuts in the pillar recesses, Injuries and damage to clothes, belongings, etc. are avoided.

Further, in the protective fence of the present invention, when the recess is formed in a groove shape along the outer wall on the side of the sidewalk of the column, the number and height of the beam pipes attached to the column vary, and the number of fixing bolts and nuts and Even if the positions are changed, all of them are accommodated in the groove-shaped concave portions, which is convenient.

Further, in the protective fence of the present invention, when the concave portion is formed into a concave shape constricted at each beam pipe mounting position on the outer wall of the side wall of the column, the bolt head and the nut in the concave portion have the entire wall surface of the concave portion. This is preferable because it is surrounded and makes it more difficult for human hands and clothes to touch or damages when the vehicle comes into contact.

Further, the protective fence of the present invention is characterized in that the cross-sectional shape of the deformed column, which is the gist of the present invention, is attached to a shape in which the reflector can be easily installed, for example, a smooth surface formed on the column outer wall, or the column outer wall is formed. When the retroreflector is attached by being fitted into the concave groove along the longitudinal direction, the reflector can be attached as specified by simple construction, and the position of the pole can be set at night from both cars and pedestrians. It can be confirmed from a distance and contributes to accident prevention.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of an example of the protective fence of the present invention.

FIG. 2 is (a): a partially cutaway perspective view, and (b): a cross-sectional view of another example of the protective fence of the present invention.

FIG. 3 is a sectional view of still another example of the protective fence of the present invention.

FIG. 4 is a cross-sectional view of another embodiment of a column used for the protective fence of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 support 11 concave portion 12 bolt hole 13 smooth surface 14 concave groove 2 beam pipe 21 joint fitting 22 bolt hole 3 bolt 31 nut 4 retroreflector 41 prismatic reflector 42 glass bead reflector

Claims (5)

[Claims] 1. A beam pipe is provided on a road side of a support, a recess is formed on a side surface of an outer wall on a sidewalk of the support, and the beam pipe is fixed to the support by a bolt penetrating a bolt hole formed in the recess. A protective fence in which the head of the bolt or the nut screwed into the bolt fits into the recess of the column. 2. The protective fence according to claim 1, wherein the concave portion is formed in a groove shape along an outer wall of the pillar on a sidewalk side. 3. The concave portion is formed in a recessed shape at each beam pipe mounting position on an outer wall on the sidewalk side of the column.
Protective fence as described. 4. The protective fence according to claim 1, wherein the setting on the side of the road and the side on the sidewalk are reversed. 5. The protective fence according to claim 1, wherein a reflector is attached to an outer wall of the column.