JP2012162915A - Scattering prevention net - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate transportation and installation at a construction site and to surely prevent scattering of crushed pieces generated during chipping work of pavement materials and concrete materials in a simple construction such as road repair.SOLUTION: In a scattering prevention fence which comprises four rectangular frame bodies 1A-1D in the same shape, the two rectangular frame bodies 1B and 1C adjacently positioned inside are hinge-connected to each other at the inner side edge, respective outer side edges of the two rectangular frame bodies 1B and 1C and respective inner side edges of the two rectangular frame bodies 1A and 1D positioned outside are hinge-connected to each other, and they can be deformed into a spread state that the rectangular frame bodies 1A-1D are connected adjacently to each other and a stored state that the rectangular frame bodies 1A-1D are folded on top of each other while being bent roughly into an M shape in the plan view. Also, a sheet body 2 is mounted so as to cover a frame space of the rectangular frame bodies 1A-1D, an opening 25 is formed at the sheet body 2 in a range of a fixed height or higher from the lower side, and a net body 26 is put on the opening 25.

Description

  The present invention relates to a scatter prevention net that is installed at a road construction site and prevents crushed pieces of pavement material and concrete material.

  In road repair work, etc., shredded pieces are scattered during paving and concrete materials. In this case, the partition made of steel plate used at a normal construction site is difficult to transport and install. Therefore, in road repair work that is completed in a relatively short period of time, a simple sheet hung around the site or surrounding the site with a plywood or the like in time.

  Patent Document 1 discloses a scatter prevention fence having a structure in which three wall members, each having a steel mesh on the upper side, a steel plate on the lower side, and a steel pipe on the column, are connected to each other so that they can be opened.

JP-A-8-74422

  The present invention solves the above-mentioned conventional problems, and in simple construction such as road repair, it can be easily transported and installed at the construction site, and the shattering fragments generated during the suspension work of pavement materials and concrete materials are scattered. It aims at providing the fence for scattering prevention which prevents reliably.

  In order to achieve the above object, according to the first aspect of the present invention, two rectangular frames (1B, 1C) that are provided with four rectangular frames (1A to 1D) having the same shape and are located adjacent to each other inward. ) Are hinged to each other at their inner edges, and the inner sides of the two rectangular frames (1A, 1D) positioned outward from the outer edges of the two rectangular frames (1B, 1C). While the edges are hinged to each other, the expanded state in which the rectangular frames (1A to 1D) are adjacent to each other and the rectangular frames (1A to 1D) are bent in a substantially M shape in plan view. The sheet body (2) is mounted so as to be able to be deformed into a folded folded state and to cover the frame space of the rectangular frame bodies (1A to 1D). An opening (25) is formed in a range above a certain height, and a net body ( 6), characterized in that the Kutsugaechaku.

  According to the first aspect of the present invention, the rectangular frame body can be developed, for example, in a substantially U shape in plan view so as to largely surround one side of the construction site. For simple construction such as manhole removal and lid height adjustment, it is often sufficient to surround one side of the construction site facing the pedestrian crossing or the roadway, so the anti-scattering fence of the first invention is effective. . In addition, since the anti-scattering fence according to the first aspect of the present invention can reduce the overall weight, it can be easily carried in the storage state in which the rectangular frames with the sheet members are folded over each other. Therefore, the anti-scattering fence can be immediately moved and reinstalled in accordance with the movement of the construction site during road repairs or manhole removal. Further, since the anti-scattering fence is configured by a net body at a certain height from the lower side, the inside and outside of the fence can be seen through the net body, and a sense of security can be given to passers-by and workers.

  In the second invention, a leg (14) is pivotally attached to the rectangular frame (1A to 1D) at an appropriate position on the lower surface of the lower side, and the leg (14) It is rotated between a storage state located below the lower side and an advanced state drawn out in a direction intersecting the lower side.

  In the second aspect of the invention, the rectangular frame can be reliably maintained in the standing posture without being affected by wind or the like by advancing the leg so as to intersect the lower side. When the legs are stored in a retracted state along the lower side of the rectangular frame, it is easy to carry the anti-scattering fence.

  In the third invention, the rectangular frame (1A, 1D) positioned outward and the rectangular frame (1B, 1C) positioned adjacent to the inner side are installed, A stay body (15) is provided for holding the rectangular frame bodies (1A, 1B and 1C, 1D) in a state where they are bent at right angles to each other.

  By folding the anti-scattering fence into such a shape, the fence can be erected more stably while surrounding the construction site.

  The reference numerals in the parentheses indicate the correspondence with specific means described in the embodiments described later.

  As described above, according to the anti-scattering fence of the present invention, in simple construction such as road repair, it can be easily transported and installed on the construction site, and the shredded fragments generated during the suspension work of pavement and concrete materials Scattering can be reliably prevented.

It is a top view of the frame structure of the fence for scattering prevention which shows one Embodiment of this invention. It is a front view of the frame structure of the fence for scattering prevention. It is a half front view of a sheet body. It is the perspective view which looked at the fence for scattering prevention installed from the inside. It is the perspective view which looked at the fence for scattering prevention installed from the outside. It is the perspective view which looked at the fence for scattering prevention of the state equipped with the soundproof sheet from the inside.

  FIG. 1 shows a plan view of a frame structure constituting a scattering prevention fence, and FIG. 2 shows a front view thereof. The frame structure is composed of four identical rectangular frames 1A, 1B, 1C, and 1D. Each of the rectangular frames 1A to 1D is a combination of square metal tubes, and includes a surrounding frame portion 11 and a central vertical beam portion 12 (FIG. 2). Two rectangular frame bodies 1B and 1C which are adjacently positioned inward are connected to each other by hinge members 13 at two upper and lower positions on the inner edge of each other. One rectangular frame 1A, 1D is positioned outside each rectangular frame 1B, 1C, and the inner edges of these rectangular frames 1A, 1D are the outer edges of the rectangular frames 1B, 1C. The upper and lower portions are connected by the hinge member 13.

  1 and 2 show a case where the rectangular frame bodies 1A to 1D are in an unfolded state where they are adjacent to each other. In a normal use state as shown in these drawings, two rectangular frames located in the center are shown. The bodies 1B and 1C are positioned linearly, and the rectangular frame bodies 1A and 1D located at both ends are bent at right angles to the rectangular frame bodies 1B and 1C, so that the entire frame structure is substantially U-shaped in plan view. Expand (Fig. 1) and enclose one side of the construction site. In simple constructions such as manhole removal and lid height adjustment, it is often sufficient to surround one side of the construction site facing the pedestrian crossing or the roadway.

  Each rectangular frame 1A-1D is provided with a leg 14 at an appropriate position on the lower side. These legs 14 are long, flat plates having the same width as the lower side, and are pivotally attached to the bottom surface of the lower side of the frame near one end from the center in the longitudinal direction. A magnet 141 is mounted on the upper surface of the other end of the leg 14. With such a structure, when the leg body 14 is rotated along the lower side of the frame body, the magnet 141 at the other end is attracted to the lower side, and the leg body 14 is accommodated along the lower surface of the lower side. When the leg 14 is used, as shown in FIG. 1, the leg 14 is rotated to advance so as to intersect the lower side. Thereby, the rectangular frames 1A to 1D are reliably maintained in the standing posture. In addition, if a weight etc. are mounted on the leg 14 which advanced, the rectangular frame 1A-1D can be kept in a standing posture more reliably.

  On the upper sides of the rectangular frames 1A and 1D, a stay body 15 is provided with one end pivotably attached to an upper surface near the connecting portion with the rectangular frames 1B and 1C. A through hole is formed in the tip plate surface of the stay body 15, and the through hole is fitted to a pin body 151 (FIG. 2) provided on the upper side of the rectangular frames 1B and 1C, as shown in FIG. The rectangular frame 1A, 1D is held substantially at right angles to the rectangular frames 1B, 1C by spanning the stay body 15 between the rectangular frames 1A, 1B and 1C, 1D at the bent corner. Can do. By making the frame structure into such a shape, the frame structure can be more stably erected while surrounding the construction site. Note that the frame structure does not necessarily have a U-shape in plan view, and can be used by changing the relative bending angles of the rectangular frames 1A to 1D in various shapes according to the situation at the site.

  Here, the frame structure can be easily put into the housed state from the unfolded state by the following procedure. That is, after the leg 14 is changed from the advanced state to the retracted state, the staying state of the stay body 15 is canceled and the rectangular frames 1A and 1D are folded over the rectangular frames 1B and 1C, respectively (arrows in FIG. 1). Thereafter, the rectangular frames 1B and 1C obtained by folding the rectangular frames 1A and 1D are further folded (arrows in FIG. 1). Thereby, a frame structure can be made into the accommodation state which mutually folded the four rectangular frame bodies 1A-1D.

  The rectangular frame bodies 1A to 1D are mounted with a resin sheet body 2 having a thickness of about 0.4 mm so as to cover the frame space. FIG. 3 shows a back view of a substantially half portion of the sheet body 2. The sheet body 2 is bilaterally symmetric, and its height H is substantially the same as that of the rectangular frame bodies 1A to 1D except for the skirt portion 21 having a constant width h formed along the lower side. The length of the sheet body 2 is substantially equal to the length of the four rectangular frame bodies 1A to 1D. A large number of eyelet holes 22 are formed at the left and right edges and the upper edge at intervals. Further, an attachment piece 23 having a constant width in the longitudinal direction is attached to the sheet body 2 along the skirt portion 21 at its upper edge, and eyelet holes 24 are formed in the attachment piece 23 at intervals in the longitudinal direction. ing.

  An opening 25 is formed in the sheet body 2 at a certain height from the lower side, except for both ends thereof, over almost the entire length and reaching the upper edge of the sheet body 2, and the opening 25 has a net body (for example, Hiraoka Oryome Co., Ltd. trade name Tarpo Screen) 26 is covered. The net body 26 is provided with bundling pieces 27 corresponding to the vertical frame portion 111 (FIG. 2) and the vertical beam portion 12 of the rectangular frame bodies 1 </ b> A to 1 </ b> D at a plurality of vertical positions in the longitudinal direction. The center of each binding piece 27 is fixed to the net body 26 in the left-right direction, and eyelet holes 28 are formed at the left and right ends of each binding piece 27.

  As shown in FIG. 4, the sheet body 2 is bound and attached to the frame portion 11 and the vertical beam portion 12 of the rectangular frame bodies 1 </ b> A to 1 </ b> D directly through the eyelets 22, 24, and 28, and through the attachment pieces 27. The FIG. 5 shows a perspective view of the anti-scattering fence with the sheet body 2 mounted on the frame structure as viewed from the outside. By surrounding the construction site with such a scattering prevention fence, the shredded pieces of pavement material and concrete material generated during the suspending work and the like are prevented from scattering outside the fence by the sheet body 2 and the net body 26.

  Since such an anti-scattering fence can be as light as about 15 kg, the four rectangular frames 1A to 1D are folded over each other as described above with the sheet 2 attached. It can be easily carried in the stored state. Therefore, the anti-scattering fence can be immediately moved and reinstalled in accordance with the movement of the construction site during road repairs or manhole removal. Moreover, since the upper part of the anti-scattering fence is formed of a net body, the inside and outside of the fence can be seen through the net body, and a sense of security can be given to passers-by and workers.

  When a soundproof sheet (for example, Kuraray Co., Ltd., product name Sound Shutter) 3 is covered on the front side of the sheet body 2 of the anti-scattering fence shown in this embodiment as shown in FIG. It is possible to effectively prevent divergence outside the fence. In FIG. 6, after the soundproof sheet 3 is covered on the fence from the front side, the rectangular frames 1 </ b> A to 1 </ b> D are formed by rubber strings 31 each having a hook (not shown) at the tip at a plurality of positions on the rear edge of the soundproof sheet 3. It is positioned by locking to the lower side.

DESCRIPTION OF SYMBOLS 1A, 1B, 1C, 1D ... Rectangular frame body, 14 ... Leg body, 15 ... Stay body, 2 ... Sheet body, 25 ... Opening, 26 ... Net body.

Claims (3)

The four rectangular frames having the same shape, the two rectangular frames positioned adjacent to each other inside are hinged to each other at the inner edges thereof, and the outer edges of the two rectangular frames are The inner edges of the two rectangular frames positioned outward are hinged to each other, and the expanded state in which these rectangular frames are adjacent to each other and the rectangular frames are substantially M-shaped in plan view. The sheet body is mounted so as to be able to be transformed into a folded storage state while being folded into a shape and covers the frame space of these rectangular frame bodies, and the sheet body has a certain height or more from the lower side. An anti-scattering fence characterized in that an opening is formed in a range and a net body is covered in the opening. A leg is pivotally attached to the rectangular frame body at an appropriate position on the lower surface of the lower side, and the leg body is positioned along the lower side and below the storage state and with respect to the lower side. The anti-scattering fence according to claim 1, wherein the fence is rotated between the extended state pulled out in a crossing direction. A stay body is installed between the rectangular frame body positioned outward and the rectangular frame body positioned adjacent to the inner side, and holds the rectangular frame bodies folded at right angles to each other. The scattering prevention fence according to claim 1 or 2 provided.

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