JP4875972B2 - Protective fence - Google Patents

Description

  In particular, the present invention relates to a protective fence that can be suitably installed near a corner of a boundary between a roadway and a sidewalk or at an intersection.

  When a guard fence is installed near a corner or an intersection, if the guard fence uses a vertical grid, the vertical grid blocks the field of view. There is a risk that it will be difficult to see pedestrians on the sidewalk. Therefore, for example, in a fence having a pillar and a fence body provided on the pillar, a part of the fence body is a short low fence, and a handrail is provided between the pillars on the upper side of the low fence so that the cross direction There has been disclosed a fence that can improve the workability at a low cost because it is not necessary to ensure the prospect of the road and to be accompanied by a special structural change (for example, Patent Document 1).

JP 2001-98795 A

  However, in the conventional guard fence as described in Patent Document 1, although the line-of-sight provided between the low fence and the handrail can secure the line of sight, the uppermost beam (handrail) is independent between the columns. Therefore, when a large external force is applied to the snow on the uppermost beam, there is a risk of deformation or breakage.

  The present invention has been made in view of the problems as described above, and can ensure a view of a road extending in the crossing direction, and the uppermost beam is deformed or damaged even when a large external force is applied to the uppermost beam. It is intended to provide a protective fence with little fear.

In order to achieve the above object, the present invention is configured as follows. That is, the protective fence according to the present invention is:
A fence panel of the first form is passed between the pillars, and a fence panel of the second form different from the fence panel is passed between the other pillars adjacent to the pillars, Both the fence panel of the form and the fence panel of the second form are provided with a plurality of vertical lattices made of round pipes with a gap between the uppermost beam and the beam below it. And the fence panel of 1st form is a flat plate part by crushing a part or the whole of the vertical lattice which consists of the round pipe into a flat plate shape, and this flat plate part and a protection fence The vertical grid of the second form of the fence panel is not provided with the flat plate portion, but remains a round pipe, The pitch between the vertical lattices of the fence panel of the first form provided with the section is flat. It is characterized in that the parts have been made larger than the pitch between the longitudinal lattice fence panels of the second embodiment is not provided.

According to the protective fence according to the present invention, since the flat plate portion of the vertical grid of the fence panel of the first embodiment is parallel to the extending direction of the protective fence, the vertical grid is made of a round pipe or the like. The range that can be seen through from the front is increased, and the road extending in the crossing direction can be secured, and a plurality of vertical grids are provided between the uppermost beam and the lower beam, so that the uppermost Even when a large external force is applied to the beam, the possibility that the uppermost beam is deformed or broken can be reduced.

Also, the vertical lattice fence panels of the first embodiment is formed using a round pipe, round pipe leaving the vicinity of at least upper and lower ends of the vertical grid is collapsed have been made with the flat plate portion Runode vertical grating and beam A flat plate portion can be provided on the vertical lattice without reducing the strength at the joint portion, and a flat plate portion can be provided at an arbitrary position in the vertical direction of the vertical lattice to easily set the appearance and transparency. preferable.

  Further, it is preferable that the vertical grids have a maximum distance of 150 mm or less because the vertical grids are too wide to prevent accidents caused by the passage of infants.

According to the protection fence according to claim 1 of the present invention, the vertical lattice is a round pipe or the like because the flat plate portion of the vertical lattice of the fence panel of the first embodiment is parallel to the extending direction of the protection fence. The range that can be seen from obliquely forward is larger than the case of consisting of, and it is possible to secure a view of the road extending in the crossing direction, and a plurality of vertical lattices are provided between the uppermost beam and the lower beam. Even when a large external force is applied to the uppermost beam, the risk of the uppermost beam being deformed or broken can be reduced.

  BEST MODE FOR CARRYING OUT THE INVENTION The best embodiment according to the present invention will be specifically described below with reference to the drawings.

FIGS. 1-3 is explanatory drawing which shows one Embodiment of the protection fence concerning this invention. First, FIG. 1 is a front view of a guard fence. The guard fence 10 is provided between fences 3 and provided with a fence panel F. The fence panel F uses steel round pipes having a plurality of types of outer diameters. The upper and lower beam 21 and the lower beam 22 formed vertically and the vertical beam 23 provided in the vertical direction at the left and right ends, and the fence panel F is a mounting bracket provided on the vertical beam 23 It is attached to the column 3 by K. Ten vertical lattices 1 are provided in the fence panel F so as to extend in the vertical direction inside the framed frame by the uppermost beam 21, the lower beam 22 and the vertical beam 23. The vertical lattice 1 is formed using a round pipe, and the flat plate portion 11 is provided by crushing the round pipe by press molding, leaving a part near the upper and lower ends. The vicinity of the upper and lower ends is left as the pipe portion 12, and is fixed to the uppermost beam 21 and the lower beam 22 by welding.

  A general-purpose fence panel F1 in which the flat plate portion 11 is not provided on the vertical lattice 1 is provided between the support pillars 3 provided with the fence panels F and between the adjacent support pillars 3. The pitch P1 between the vertical lattices 1 of the fence panel F provided with the flat plate portion 11 is larger than the pitch P2 between the vertical lattices of the fence panel F1 provided with no flat plate portion. In the case of 150 mm, the pitch P1 is increased by about 10 to 30%. For example, when the pitch P1 is 175 mm, both the provision of the flat plate portion 11 and the expansion of the pitch P1 are in phase. As a result, the transparency from obliquely forward is improved.

  Next, FIG. 2 is a sectional view showing an AA section in FIG. The flat plate portion 11 provided in the vertical lattice 1 is formed into a flat plate shape, and the flat plate portion 11 is provided in parallel with the extending direction α of the guard fence 10. For example, a steel pipe having an outer diameter L1 = 21.7 mm and a wall thickness of 1.9 mm is used to form the vertical lattice 1. When the round pipe is crushed, a round pipe having an outer diameter L1 = 21.7 mm is obtained. The flat plate portion 11 has a width L2 = 28 mm. Since the width L2 of the flat plate portion 11 is 28 mm, the length P3 of the gap between the vertical lattices 1 in the flat plate portion 11 is 147 mm, which is 150 mm or less.

  Regarding the gap between the vertical grids 1, in the fence for pedestrian bicycles shown in “Protection fence installation standards and explanation” (Japan Road Association, March 2004), It is recommended that the interval is desirably 150 mm or less so that an infant cannot pass through, and the gap P3 between the vertical lattices 1 is set to be 150 mm or less based on such a standard.

FIG. 3 is an enlarged surface view showing details of the vicinity of the pipe portion 12 provided below the vertical lattice 1 of the fence panel F. When the pitch P1 between the vertical lattices 1 is increased, the interval between the pipe portions 12 is also increased, so that the gap between the pipe portions 12 is also increased, which may exceed 150 mm. When a round pipe having an outer diameter of 21.7 mm is used as the vertical grid 1 and the pitch P1 is set to 175 mm, the gap between the pipe portions 12 is 153.3 mm, which exceeds 150 mm. By setting the portion P4 to be left as one pipe portion 12 to be 110 mm or less, the vicinity of the lower end of the flat plate portion 11 interferes from above, and a sphere exceeding 150 mm cannot pass between the vertical lattices 1. Even if the pitch P <b> 1 between the vertical lattices 1 is increased by setting the length of the pipe portion 12, the above-described standard can be satisfied.

4 and 5 are explanatory diagrams showing a reference example of the protective fence . First, FIG. 4 is a cross-sectional view of the fence panel of the protective fence. As in the first embodiment, the uppermost beam and the lower stage of the plural stages of beams provided between the columns in the protective fence. A plurality of vertical lattices 1 are provided at intervals between the beams, and a part of the vertical lattice 1 in the vertical direction is formed as a flat plate portion 11. The flat plate portion 11 is a flat plate shape. The formed surface is provided in an oblique direction, and when installed on the left side edge of the roadway, the angle θ formed by the traveling direction α of the vehicle and the flat plate portion 11 forms an obtuse angle. . Since the angle θ between the flat plate portion 11 and the traveling direction α is an obtuse angle, the visibility from the driver of the vehicle traveling in the traveling direction α to the left diagonal front with respect to the sidewalk H is improved. Pedestrians and bicycles passing the sidewalk H are easier to see than when round pipes are used.

  If the angle α formed by the flat plate portion 11 and the traveling direction α is an obtuse angle, the transparency from obliquely forward is improved. However, in order to make the sidewalk visible to the driver of the vehicle traveling on the roadway R1, 140 °. It is preferable that the angle is about 175 °, more preferably about 155 ° to 170 °.

  FIG. 5 is a perspective view showing an example of an installation state of the protective fence. On the road R1 between the roadway R1 and the sidewalk H, a protective fence 10 is provided along the extending direction of the roadway R1. The roadway R1 and the second roadway R2 extending in the crossing direction with the roadway R1 intersect at the intersection C, and the angle θ formed by the vehicle traveling direction α on the roadway R1 and the flat plate portion 11 of the fence panel F is an obtuse angle. Has been made. In the present embodiment, the fence panel F provided with the flat plate portion 11 is provided between the support columns 3 for one span from the intersection C. However, depending on the situation, the fence panel F provided with the flat plate portion 11 may be about 1 to 3 spans. Good. With this fence panel F, there are pedestrians who are going to cross the pedestrian crossing C1 crossing the roadway R1 from the sidewalk H and pedestrians trying to cross the pedestrian crossing C2 crossing the second roadway R2 from the sidewalk H. It becomes possible to see through through the fence panel F, and the risk of a contact accident occurring can be reduced. The installation of the fence panel F provided with the flat plate portion 11 is not limited to the vicinity of the intersection C. For example, the fence panel F is installed in the vicinity of a pedestrian crossing provided with a pedestrian crossing in the middle of a straight road. Alternatively, the existing fence panel may be removed and replaced with the fence panel F newly provided with the flat plate portion 11 to improve the transparency.

It is a front view which shows 1st embodiment of the protection fence concerning this invention. It is AA sectional drawing of FIG. It is an enlarged front view of the vicinity of a pipe part of the protective fence concerning this invention. It is a cross-sectional view showing a reference example of a protective fence . It is a perspective view which shows an example of the installation state in the reference example of a protection fence .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vertical lattice 11 Flat plate part 12 Pipe part 21 Uppermost beam 22 Lower stage beam 3 Post 10 Guard fence F Fence panel R Roadway H Sidewalk α Traveling direction of the vehicle on the roadway

Claims (2)

A fence panel of the first form is passed between the pillars, and a fence panel of the second form different from the fence panel is passed between the other pillars adjacent to the pillars, Both the fence panel of the form and the fence panel of the second form are provided with a plurality of vertical lattices made of round pipes with a gap between the uppermost beam and the beam below it. And the fence panel of 1st form is a flat plate part by crushing a part or the whole of the vertical lattice which consists of the round pipe into a flat plate shape, and this flat plate part and a protection fence The vertical grid of the second form of the fence panel is not provided with the flat plate portion, but remains a round pipe, The pitch between the vertical lattices of the fence panel of the first form provided with the section is flat. Safety barrier, characterized in that the parts have been made larger than the pitch between the longitudinal lattice fence panels of the second embodiment is not provided. The protective fence according to claim 1 , wherein the vertical lattices are configured such that a maximum distance between them is 150 mm or less.

Images