Fall prevention device for temporary enclosures

Abstract

To keep the area of a temporary enclosure occupied in a site small and avoid an influence on an existing buried object by utilizing a foundation and a bottom board for supporting a temporary enclosure plate in preventing the temporary enclosure plate from overturning.SOLUTION: An overturn prevention device 1 for temporary enclosures comprises: a holding material 6 that constitutes a temporary enclosure, supports the lower part of a temporary enclosure plate 8 with which a bottom board 14 is used together, includes a foundation 2 with a joint piece 2a on the bottom board 14 side, and is placed under the bottom board 14 and bonded to the joint piece 2a of the foundation 2; and a pressing material 4 that is positioned over the bottom board 14 and joined to the joint piece 2a of the foundation 2 and that, together with the holding material 6, grips the bottom board 14 from above and below.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a device for preventing temporary fencing from collapsing, which uses a base and a floor plate supporting the temporary fencing board to prevent the temporary fencing board from collapsing. [Background technology]

[0002] The temporary fencing plates, such as steel plates that make up the temporary fencing, are basically connected to a foundation, such as an H-shaped steel, that is installed continuously along the bottom end of the temporary fencing plate on the ground surface on which the temporary fencing plate is supported, so that it is installed on the ground surface in a state where it cannot tip over (see Patent Documents 1 and 2). Diagonal members may be installed between the top of the temporary fencing plate, the middle part in the height direction, and the foundation to prevent the plate from being deformed by wind.

[0003] There is also a method for preventing temporary fencing boards from falling over that does not rely on a foundation along the bottom edge of the boards, but instead uses support metal fittings and a base plate that are partially installed on the ground surface, spanning between the vertical frames of adjacent temporary fencing boards in the direction the boards continue (see Patent Document 3). However, with this method, it is expected that the stress caused by wind loads that tend to topple the temporary fencing boards will be concentrated on the support metal fittings, which will be prone to deformation.

[0004] If the connection to the foundation 2 alone is not sufficient to prevent the temporary fencing board 8 from tipping over, a diagonal member 12 can be installed on the back of the temporary fencing board 8 as shown in Figure 4-(b), and a pile 15 connected to a horizontal member (rollover member) 11 installed between the diagonal member 12 and the board can be driven into the ground, with the pile 15 expected to provide support and pull-out resistance. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP-A-8-270225 (Claim 1, paragraphs 0007-0011, Figures 1 and 2) [Patent Document 2] Registered Utility Model No. 3107929 (paragraphs 0027-0035, Figures 1-3) [Patent Document 3] JP 2006-226077 A (Claim 1, paragraphs 0012-0022, Figures 1-4) Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the example shown in Figure 4-(b), the width of the area to be secured for the installation of the temporary fence around the site becomes large, and the area occupied by the temporary fence increases, which may reduce the area to be secured for the structure to be constructed. In addition, driving the piles 15 into the ground may damage buried objects such as water pipes, sewer pipes, gas pipes, telephone lines, electric cables, etc. that were originally buried underground.

[0007] In light of the above background, the present invention proposes a device to prevent temporary fences from collapsing, which reduces the area of ​​temporary fences taken up on a site and does not affect the installation area of ​​the structure relative to the site area, nor does it affect existing buried objects. [Means for solving the problem]

[0008] The fall prevention device for a temporary enclosure according to claim 1 is a device for supporting a lower portion of a temporary enclosure plate used in combination with a floor plate, and is provided on the side of the floor plate. A vertically oriented plate A device that includes a base having a joint piece and prevents the temporary fencing board from falling over, The joint piece of the foundation is disposed under the bottom plate. The bottom plate side to be joined Has overlapping pieces A clamping material and a joint piece of the base arranged on the bottom plate The bottom plate side Joined to The overlapping piece and a pressing member that holds the floor plate from above and below together with the clamping member, The clamping member and the pressing member have a clamping piece and a pressing piece that overlap the lower surface and the upper surface of the sole plate, respectively, and the overlapping piece of the clamping member and the overlapping piece of the pressing member overlap each other and are joined to the joining piece. The above is a constituent element.

[0009] "Temporary fencing plate" refers to a plate such as a steel plate that is the main body of the temporary fencing. "Base plate" refers to a plate that is laid inside the temporary fencing plate, sandwiched between the temporary fencing plate, for the purpose of protecting the ground when materials are brought into the site. "Foundation" is a member that is continuously installed in the length direction along the lower end of the temporary fencing plate 8 on the ground surface as shown in Figure 1, and stabilizes the temporary fencing plate 8 on the ground surface as a "weight". H-shaped steel is mainly used for the foundation 2, but the shape (cross-sectional shape) and material are not important. "Foundation with a joint piece on the base plate side" refers to a plate-shaped member such as a flange on the base plate 14 side of the foundation 2 for joining the holding member 4.

[0010] The clamping material 6 is placed below the end of the base plate 14 facing the temporary fencing board 8, and the pressing material 4 is placed on the top of the base plate 14 so as to sandwich the base plate 14 from above and below together with the clamping material 6, and is joined to the connecting piece 2a together with the clamping material 6. The clamping material 6 and the pressing material 4 basically overlap directly on the bottom and top of the base plate 14, but some kind of filler material may be used between them. The "end of the base plate facing the temporary fencing board" refers to the strip-shaped area of ​​the base plate 14 that is closer to the foundation 2. The clamping material 6 and the pressing material 4 are mainly joined to the base plate 14 side of the connecting piece 2a, but this is not necessarily required. "Joining" mainly refers to welding or bolting, but joining via clamps etc. is also possible.

[0011] The clamping material 6 is joined to the joining piece 2a of the base 2, together with the pressure member 4, directly sandwiching the base plate 14 from above and below.When the two are joined to the joining piece 2a with a bolt 5, for example, depending on the method of forming the insertion hole through which the bolt 5 passes, the base plate 14 can be clamped with pressure applied from above and below, making it possible for the base plate 14 to move integrally with the base 2.

[0012] The clamping material 6 and the holding material 4 clamp the end of the base plate 14 on the temporary fencing board 8 side, so that when the temporary fencing board 8 tries to fall outside the site, the clamping piece 6b of the clamping material 6 overlapping the underside of the base plate 14 engages upward with the base plate 14, preventing the temporary fencing board 8 from falling over.

[0013] When the temporary fencing board 8 is about to tip over into the site, the pressing piece 4b overlapping the upper surface of the base plate 14 of the pressing member 4 presses downward on the upper surface of the base plate 14, thereby receiving an upward reaction force from the base plate 14 according to the area of ​​the pressing piece 4b. To the extent that the pressing member 4 receives the reaction force from the base plate 14, the temporary fencing board 8 is prevented from tipping over.

[0014] Both the pressing member 4 and the clamping member 6 are joined to the joining piece 2a. At the same time, the bottom surface of the pressing member 4 and the top surface of the clamping member 6 sandwich the sole plate 14 from above and below, so basically, an L-shaped cross-section material is suitable as shown in Fig. 2, but this shape is not limiting. The pressing member 4 basically has an overlapping piece 4a and a pressing piece 4b that overlap and are joined to the joining piece 2a, and the clamping member 6 similarly has an overlapping piece 6a that overlaps and is joined to the joining piece 2a, and the above-mentioned clamping piece 6b.

[0015] Thus, in claim 1, the stability of the temporary fencing board 8 against tipping over on both sides in the thickness direction is ensured by the base 2 supporting the lower part of the temporary fencing board 8, and the clamping member 6 and the retaining member 4 that are joined to the joint piece 2a on the base plate 14 side of the base 2 and clamp the end of the base plate 14 on the temporary fencing board 8 side. In comparison with the example shown in Figure 4, the width L1 that the temporary fencing board 8 occupies within the site when viewed in the length direction is reduced to nearly half of the conventional width L2 as shown in Figure 4-(c). At the same time, it becomes possible to expand the planar area to be secured for structures to be constructed within the site. The expanded range is indicated by diagonal lines in Figure 4-(c).

[0016] Furthermore, since the stability of the temporary fencing board 8 against tipping over is ensured by only the base 2, the clamping material 6, and the clamping material 4, the piles 15 in the example shown in Figure 4 are unnecessary, and therefore there is no damage to buried objects such as pipes that were originally buried in the ground.

[0017] When the clamping material 6 and the pressing material 4 are both joined to the base plate 14 side of the connecting piece 2a as shown in Figure 2, by placing a support material 7 (71) that pairs with the clamping material 6 on the opposite side of the clamping material 6, sandwiching the connecting piece 2a, and joining it to the connecting piece 2a (claim 2), the base 2 can be brought into contact with the ground surface on the plane formed by the combination of the clamping material 6 and the support material 71 on the lower end surface of the base 2.

[0018] In this case, by aligning the vertical height of the undersides of the clamping material 6 and the supporting material 71 with the bottom end face of the foundation 2, the vertical height of the underside of the clamping material 6 and the bottom end face of the foundation 2 are aligned, thereby increasing stability against horizontal movement and sinking (penetration) when the foundation 2 is installed on the ground surface. The clamping material 6 and the supporting material 71 are joined to the joint piece 2a of the foundation 2 mainly with bolts 5, but may also be joined by welding.

[0019] In addition, by placing the clamping material 6 and the support material 71 between the joint piece 2a of the base 2 and joining them to the joint piece 2a, when the base plate 3 is laid under the base 2 as described below, it becomes easier to integrate the base 2 and the base plate 3 by welding or the like.

[0020] 1 and 2, a base plate 3 is laid on the ground surface to distribute the vertical load acting on the ground from the joint piece (flange) 2a of the foundation 2, and to accommodate unevenness on the ground surface, etc. If the base plate 3 has a length that spans the underside of the end of the base plate 14 on the temporary fencing board 8 side and at least the underside of the joint piece 2a of the foundation 2 as shown in the figures, the stability of the temporary fencing board 8 against tipping over is improved.

[0021] "At least" means that the base plate 3 extends from below the end of the floor plate 14 closest to the temporary fencing board 8 toward the temporary fencing board 8, over the joint piece 2a of the foundation 2, and into any part of the width of the foundation 2. Figure 2 shows an example in which the base plate 3 is positioned across the entire width of the foundation 2. When the base plate 3 spans the entire width of the foundation 2, the mass of all components supported by the foundation 2, including the temporary fencing board 8, acts downward on the base plate 3.

[0022] When wind load acts on the temporary fencing board 8, the load is dispersed to the ground surface via the joint pieces 2, the clamping material 6, the support material 71, and the base plate 3. By passing the load through the base plate 3, the load is dispersed over a wider area, improving the stability of the temporary fencing board 8 against tipping over.

[0023] However, as shown in the figure, if the clamping material 6 and the supporting material 71 are arranged on both sides of the joint piece 2a on the side of the floor plate 14, and a supporting material 72 is also arranged on the side of the joint piece 2a of the joint piece 2b on the side opposite to this joint piece 2a (outside the site), both supporting materials 71, 72 can function as the base plate 3, so that the same degree of stability against tipping as when there is a base plate 3 can be obtained. Figure 2 shows the case where the clamping material 6 and the supporting materials 71, 72 are joined to the joint pieces 2a, 2b using bolts 5 that penetrate the joint pieces 2a, 2b together. When the base plate 3 is installed, the base plate 3 may be joined to the foundation 2 via the clamping material 6, or via the clamping material 6 and the supporting material 7, by welding or the like. Effect of the Invention

[0024] It is equipped with a base that supports the lower part of the temporary fencing plate, and a clamping material and a holding material that are joined to the joint piece on the base's base side and clamp the end of the base plate on the temporary fencing plate side, and when the temporary fencing plate tries to tip over in the thickness direction, the mass of the base plate and the reaction force from the base plate are used to prevent the plate from tipping over, so it is possible to ensure stability against the temporary fencing plate tipping over on both sides in the thickness direction without using diagonal members and piles. By eliminating the need for piles, there is no risk of damaging buried objects such as pipes that were originally buried in the ground.

[0025] As a result, the width of the temporary fencing boards that the temporary fencing occupies on the site when viewed in the length direction can be reduced to nearly half compared to the example shown in Figure 4. At the same time, the area that needs to be secured for the structures to be constructed on the site can be expanded. [Brief description of the drawings]

[0026] [Figure 1] This is a cross-sectional view (side view) of a temporary fencing board showing the appearance when a fall prevention device is placed on the inside of the site side of the temporary fencing board. [Diagram 2] 2 is an enlarged cross-sectional view showing the relationship between the fall prevention device and the base plate shown in FIG. 1. [Diagram 3] 3A is a perspective view of FIG. 2, and FIG. 3B is an elevational view showing a manufacturing example of the clamp member shown in FIG. 3A and its relationship with the bolt. [Figure 4] (a) is a cross-sectional view showing the width of the anti-tip device shown in Figure 1, (b) is a cross-sectional view showing an example of a temporary fence with a conventional structure in which a diagonal member is erected on the back of a temporary fence board and piles indirectly connected to the diagonal member are driven into the ground, and its width, and (c) is a plan view showing the difference in width when the examples of (a) and (b) are viewed in plan. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Figures 1 to 3 show an example configuration of a fall prevention device 1 that forms a temporary fence, supports the lower part of a temporary fencing board 8 that is used in conjunction with a base plate 14, and includes a base 2 having a joint piece 2a on the side of the base plate 14, and prevents the temporary fencing board 8 from falling over, and an example combination with the temporary fencing board 8.

[0028] In the drawings, H-shaped steel is used as the base 2 because it is easy to combine with the base plate 14, but other shapes of steel material or concrete members can also be used as the material for the base 2, so long as they have a shape that has a connecting piece 2a on the side of the base plate 14. When the base 2 is an H-shaped steel, the connecting piece 2a is one of the flanges.

[0029] The fall prevention device 1 includes, in addition to the base 2, a clamping material 6 arranged under the base plate 14 and joined to the joint piece 2a of the base 2, and a pressing material 4 arranged on the base plate 14 and joined to the joint piece 2a of the base 2, and clamping the base plate 14 from above and below together with the clamping material 6.

[0030] The pressing member 4 has an overlapping piece 4a that overlaps and is joined to the joining piece 2a, and a pressing piece 4b that overlaps the upper surface of the base plate 14 and presses the base plate 14 downward, while the clamping member 6 has an overlapping piece 6a that overlaps and is joined to the joining piece 2a, and a clamping piece 6b that overlaps the lower surface of the base plate 14 and clamps the base plate 14 together with the pressing piece 4b. The pressing member 4 is basically joined to the joining piece 2a in a state where it overlaps the clamping member 6, but since it is located above the base plate 14, in principle the pressing member 4 overlaps the surface of the clamping member 6.

[0031] In order to keep the temporary fencing board 8 upright, vertical members (posts) 9 and horizontal members (horizontal base) 10 for connecting the foundation 2 to the temporary fencing board 8 are connected to the floor board 14 side of the temporary fencing board 8 as shown in Figure 1. Horizontal members (rolling members) 11 for connecting the foundation 2 are connected to the floor board 14 side of the vertical members 9 (posts) located relatively closer to the floor board 14, or the horizontal members (horizontal base) 10, and the foundation 2 is connected to the horizontal members (rolling members) 11. The vertical members (posts) 9 and horizontal members (horizontal base) 10 are connected to the temporary fencing board 8 using clamps 13 or the like. The clamps 13 are connected to the temporary fencing board 8 by screwing in screws or the like that come with the clamps 13.

[0032] The base 2 is also connected to the horizontal member (roll) 11 using a clamp 13 or the like. Specifically, the clamp 13 is installed across the upper end of the joint piece (flange) 2a of the base 2, or across the upper end of the other joint piece (flange) 2b that pairs with the joint piece 2a in the width direction of the base 2, and the horizontal member (roll) 11, and is connected to both.

[0033] A diagonal member 12 is installed between the vertical member (support) 9 and the horizontal member (rollover) 11 to stabilize the horizontal member (rollover) 11 and support it on the vertical member (support) 9. The diagonal member 12 and the horizontal member (rollover) 11 function to prevent deformation of the temporary fencing board 8 while transmitting the wind load received by the temporary fencing board 8 to the foundation 2. The upper end of the diagonal member 12 is connected to the section from the upper end of the vertical member (support) 9 to the middle part in the axial direction.

[0034] As shown in Figures 2 and 3, the pressing member 4 is placed on the bottom plate 14 side of the connecting piece 2a and is joined to the connecting piece 2a using bolts 5 or the like that pass through the overlapping piece 4a and the connecting piece 2a. The pressing member 4 may also be joined by welding or clamps 13. In the drawings, the clamping member 6 is placed on the base 2 side of the pressing member 4 as described above, and the overlapping piece 6a of the clamping member 6 is directly joined to the connecting piece 2a, but the pressing member 4 may also be directly overlapped on the connecting piece 2a.

[0035] In the example shown in Fig. 2, the overlapping pieces 4a, 6a of the pressing member 4 and the clamping member 6 are both joined to the joint piece 2a on the floor plate 14 side with the same bolt 5, so that when the pressing member 4 and the clamping member 6 are joined to the joint piece 2a by fastening the nut 51, the pressing member 4 and the clamping member 6 can clamp the floor plate 14 in the thickness direction. The bolt 5 passes through insertion holes formed in the joint piece 2a and both overlapping pieces 4a, 6a, and the nut 51 is screwed into the end protruding from the overlapping pieces 4a, 6a towards the floor plate 14 side.

[0036] The drawing also shows that the base plate 3 is placed on the ground surface, spanning below the end of the base plate 14 on the temporary fencing plate 8 side and at least below the joint piece 2a of the foundation 2, so that the vertical load acting on the ground from the foundation 2 is dispersed. The base plate 3 extends in the width direction of the foundation 2 from the end of the base plate 14 side of the base plate 14 toward the base plate 14 side, at least long enough to support the mass of the base plate 14 downward and be restrained by the ground surface. The base plate 3 does not necessarily have to span the entire width of the foundation 2 toward the temporary fencing plate 8 side, but in order to fully support the mass of the foundation 2 downward, it is appropriate for the base plate 3 to have a length that at least reaches below the end of the base 2 on the temporary fencing plate 8 side, as shown in the drawing.

[0037] 2, a supporting material 71 that pairs with the sandwiching material 6 is arranged on the opposite side of the sandwiching material 6, sandwiching the connecting piece 2a on the sole plate 14 side, and joined to the connecting piece 2a, thereby ensuring stability against sinking, etc., when the foundation 2 is installed on the ground surface or on the base plate 3. The supporting material 71 is in a paired relationship with the sandwiching material 6, has the same or a similar cross-sectional shape as the sandwiching material 6, and is joined to the connecting piece 2a by bolts 5 or the like that join the supporting material 71 to the connecting piece 2a.

[0038] In this particular example, since the base plate 3 has a length spanning both connecting pieces 2a, 2b of the foundation 2, the support material 72 is also positioned inside the connecting piece 2b on the temporary enclosure board 8 side, and the supports 71, 72 are joined facing each other on the opposing sides of the connecting pieces 2a, 2b. In this relationship, the bolt 5 is given a length spanning both connecting pieces 2a, 2b.

[0039] In this case, the foundation 2 includes the clamping member 6 and supporting member 71 joined to the joint piece 2a on the sole plate 14 side, and the supporting member 72 joined to the joint piece 2b on the opposing side, each of which includes the clamping piece 6b, and the pieces that come into contact with the ground bring the foundation 2 into contact with the ground on its surface, so stability of the foundation 2 in a state of being supported by the ground when placed on the ground surface is ensured without relying on the base plate 3. This stability refers to stability against settlement or tilting into the ground and horizontal sliding at the joint pieces 2a and 2b of the foundation 2.

[0040] In addition, the vertical load, including the mass of the foundation 2 plus the mass of all temporary materials including the vertical members (pillars) 9 supported by the foundation 2, is transmitted in a distributed manner in the width direction of the foundation 2 through the pieces of the clamping member 6 and both supporting members 71, 72 that come into contact with the ground, so that the pieces in contact with the ground can bear the reaction force from the ground surface in a distributed manner in the width direction. When the base plate 3 is placed under the foundation 2, the base plate 3 bears the reaction force from the ground surface in a distributed manner in the width direction.

[0041] When the support members 71, 72 are joined to both joint pieces 2a, 2b of the foundation 2 and the base plate 3 is placed under the foundation 2, the foundation 2 can be joined to the base plate 3 via three parts, the sandwiching member 6 and the two support members 71, 72, and the joining ensures the unity of the foundation 2 and the base plate 3. In addition, the vertical load, which is the sum of the mass of all temporary materials including the vertical members (pillars) 9 supported by the foundation 2, including the mass of the foundation 2, is distributed and transmitted to the base plate 3 in the width direction. As a result, the base plate 3 can receive the reaction force from the ground surface in a distributed manner in the width direction. The sandwiching member 6 and the two support members 71, 72 are joined to the base plate 3, for example, by leaving a distance in the axial direction and partially welding them.

[0042] In Fig. 3-(a), a bolt 5 is installed between the opposing joint pieces 2a, 2b of the base 2, and nuts 51 are screwed onto both ends protruding outward (towards the surface) from the joint pieces 2a, 2b. In this state, the portion of the pressing member 4 that overlaps with the bottom plate 14 is cut out so that the pressing member 4 can be dropped onto the bottom plate 14 placed on the clamping member 6. In this case, the nut 51 can be tightened with the bottom plate 14 clamped between the pressing member 4 and the clamping member 6.

[0043] The clamping member 4 has overlapping piece 4a and clamping piece 4b, and a notch is cut out at the position where it overlaps with the bolt 5 in clamping piece 4b as shown in Fig. 3-(a), or in the portion from overlapping piece 4a to clamping piece 4b as shown in Fig. 3-(b). When a notch 4c is formed at the position where it overlaps with the bolt 5 from overlapping piece 4a to clamping piece 4b as shown in Fig. 3-(b), with nuts 51 screwed onto both ends of the bolt 5, the clamping member 4 can be dropped from above, and the bolt 5 can be inserted from below into notch 4c.

[0044] As a result, it is possible to connect the bolt 5 to the base 2 in advance, and it is possible to fasten the nut 51 and join the pressing member 4 (overlapping piece 4a) to the connecting piece 2a while securely clamping the sole plate 14 between the pressing member 4 (pressing piece 4b) and the clamping member 6. Figures 3-(a) and (b) show an example in which one pressing member 4 is joined to the connecting piece 2a with two bolts 5, so that two notches 4c are formed in the length direction of the pressing member 4, but there are also cases in which one pressing member 4 is joined with one bolt 5, in which case there is only one notch 4c. [Explanation of symbols]

[0045] 1...anti-tip device, 2...base, 2a...(holding member side) joint piece, 2b...(opposite side) joint piece, 3...Base plate, 4: clamping member, 4a: overlapping piece, 4b: clamping piece, 4c: notch, 5...Bolt, 51...Nut, 6...Pinching material, 6a...Overlapping piece, 6b...Pinching piece, 7...support material, 71...(sole side) support material, 72...(opposite side) support material, 8...Temporary fencing boards, 9...Vertical member, 10...Horizontal member, 11...Horizontal member, 12...Diagonal member, 13...Clamp, 14...Singing board, 15...Pile.

Claims

1. A device that constitutes a temporary fence, supports the lower part of a temporary fence board to be used in conjunction with a base plate, includes a base having a plate-shaped joint piece facing vertically toward the base plate, and prevents the temporary fence board from falling over. a clamping member disposed under the floor plate and having an overlapping piece joined to the floor plate side of the joining piece of the base, and a pressing member disposed on the floor plate and having an overlapping piece joined to the floor plate side of the joining piece of the base, and sandwiching the floor plate from above and below together with the clamping member; A device to prevent temporary fencing from collapsing, characterized in that the clamping material and the pressing material have clamping pieces and pressing pieces that overlap the lower and upper surfaces of the base plate, respectively, and the overlapping pieces of the clamping material and the overlapping pieces of the pressing material overlap each other and are joined to the joining piece.

2. A temporary fence tip-over prevention device as described in claim 1, characterized in that a support material that pairs with the clamping material is arranged on the opposite side of the clamping material, sandwiching the joint piece, and joined to the joint piece.

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