JP2021127646A - Fall prevention tool and fall prevention tool installation method - Google Patents

Abstract

To provide a fall prevention tool that is attached so as to prevent a decrease in strength at the upper end of a buried structure and a fall prevention tool installation method.SOLUTION: A fall prevention tool attached to a buried structure 900 provided with a waterway in a manner that prevents the tool from falling into the waterway, comprises: a base member 100 attached to an upper end 930 of a side wall 920 of the buried structure 900; an intermediate member 200 attached to the base member 100; and a fence member connected to the intermediate member 200. The base member 100 includes: an outer wall 120 located on an outer surface 931 of the upper end 930 of the side wall 920 of the buried structure 900; an upper wall 110 located on an upper surface 932 of the upper end 930 of the side wall 920 of the buried structure 900; and an inner wall located on an inner surface 933 of the upper end 930 of the side wall 920 of the buried structure 900. The base member 100 is attached to cover the upper end 930 of the side wall 920 of the buried structure 900 by the outer wall 120, the upper wall 110, and the inner wall.SELECTED DRAWING: Figure 6

Description

The present invention relates to a fall prevention device that is attached to a buried structure provided with a water channel to prevent a fall into the water channel, and a method of installing the fall prevention device.

Buried structures such as gutters with relatively large waterways for draining rainwater may be installed on the shoulders of paved roads. Since this buried structure is wide, it is not possible to install a lid or grating that straddles the waterway, so the upper part remains open. Therefore, conventionally, a fence for calling attention to prevent people, vehicles, etc. from falling into the waterway has been installed in the buried structure. In this fence, a fixing hole extending in the vertical direction is drilled at the upper end of the side wall of the buried structure, a support is fixed in the fixing hole, and the fence is hung on the support.

However, in the conventional fence, since the fixing hole extending in the vertical direction is provided at the upper end where the width of the buried structure is narrow, there is a problem that the strength of the upper end of the buried structure is lowered. In particular, since the fixing holes were dug deeply downward in order to erect and fix the columns, the decrease in strength at the upper end of the buried structure was remarkable.

Therefore, in view of the above problems, the present invention provides a fall prevention tool attached so as to prevent a decrease in strength of the upper end of the buried structure, and a method of installing the fall prevention tool.

The fall prevention tool of the present invention is a fall prevention tool that is attached to a buried structure provided with a water channel to prevent the fall into the water channel, and includes a base member attached to the upper end of a side wall of the buried structure and the said. An intermediate member attached to the base member and a fence member connected to the intermediate member are provided, and the base member includes an outer wall arranged on the outer surface of the upper end of the side wall of the buried structure and the buried structure. The base member includes an upper wall arranged on the upper surface of the upper end of the side wall and an inner wall arranged on the inner surface of the upper end of the side wall of the buried structure, and the base member includes the outer wall, the upper wall, and the inner wall. , It is characterized in that it is attached so as to cover the upper end of the side wall of the buried structure.

According to the above features, the outer wall of the base member is placed on the outer surface of the upper end of the embedded structure, the upper wall of the base member is placed on the upper surface of the upper end, and the inner wall of the base member is placed on the inner surface of the upper end. A substantially U-shaped base member is attached so as to cover the upper end of the buried structure. Therefore, unlike the prior art, it is not necessary to provide a deep fixing hole at the upper end of the buried structure for erecting a support column, and it is possible to prevent a decrease in the strength of the upper end of the buried structure.

Further, the fall prevention tool of the present invention is a movable fixing member that can move to the inner wall of the base member toward the inner surface of the upper end of the buried structure and can be fixed in contact with the inner surface. Is provided.

According to the above features, the movable fixing member firmly attaches the base member so as to be sandwiched between the upper ends of the buried structure.

Further, the fall prevention tool of the present invention is characterized in that the fence member is rotatably connected to the intermediate member.

According to the above features, the fence members can be arranged along the shape of the buried structure.

Further, the fall prevention tool of the present invention is characterized in that two intermediate members are provided on the base member.

According to the above characteristics, the degree of freedom in arranging the fence members is increased, for example, the heights of the adjacent fence members are made uniform.

Further, the fall prevention tool of the present invention is characterized in that the intermediate member is provided on the inner wall side of the center of the base member.

According to the above characteristics, since the intermediate member and the fence member are arranged on the waterway side of the buried structure apart from the road surface, the intermediate member and the fence member do not narrow the road width of the road surface.

Further, in the method of installing the fall prevention tool of the present invention, the road surface is dug down to form a groove at the boundary portion between the upper end of the side wall of the buried structure and the road surface in which the buried structure is buried, and the base is formed. The base member is attached to the upper end of the side wall of the buried structure so that the outer wall of the member is inserted into the groove.

According to the above characteristics, since the outer wall of the base member is inserted into the groove, the outer wall of the base member is sandwiched in the groove, and the base member is less likely to come off from the upper end of the buried structure.

As described above, according to the fall prevention tool of the present invention and the method of installing the fall prevention tool, the buried structure is attached so as to prevent the strength of the upper end of the buried structure from being lowered.

(A) is an overall perspective view of the base member of the fall prevention tool according to the first embodiment of the present invention, (b) is a plan view of the base member, (c) is a side view of the base member, and (d) is a base member. (E) is a front view of the base member and is a rear view of the base member. (A) is an overall perspective view of a base member with an intermediate member and a movable fixing member attached, (b) is a side view of the state, (c) is a front view of the state, and (d) is the state of the state. It is a rear view. (A) is a front view of the fence member, (b) is a plan view of the fence member, (c) is a left side view of the fence member, and (d) is a left side view of the fence member. (E) is a right side view of the fence member, (f) is a right side view of the fence member, and is a right side view of the fence member with the fixing bolts attached. (A) is a plan view of the buried structure, (b) is a plan view of the buried structure, and is a plan view of a state in which a base member of a fall prevention tool is attached, and (c) is a cross-sectional view taken along the line AA. Is. (A) is a plan view of the state where the fall prevention tool is attached to the buried structure, and (b) is a front view of the state where the fall prevention tool is attached to the buried structure. FIG. 5 (a) is a cross-sectional view taken along the line BB of FIG. 5 (a). (A) is a front view of the fall prevention tool according to the second embodiment of the present invention, and (b) is an enlarged side view of the periphery of the intermediate member of the fall prevention tool. (A) is a front view of the fall prevention tool according to the third embodiment of the present invention, and (b) is an enlarged side view of the periphery of the intermediate member of the fall prevention tool. (A) is a front view of the fall prevention tool according to the fourth embodiment of the present invention, and (b) is a side view of the fall prevention tool.

100 Base member 110 Upper wall 120 Outer wall 130 Inner wall 200 Intermediate member 400 Fence member 500 Fall preventer 900 Buried structure 910 Waterway 920 Side wall 930 Upper end 931 Outer side surface 932 Upper surface 933 Inner surface

(Embodiment 1)
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 5. The shapes of the figures referred to in the following description are conceptual diagrams or schematic views for explaining suitable shape dimensions, and the dimensional ratios and the like do not always match the actual dimensional ratios. That is, the present invention is not limited to the dimensional ratio in the drawings. As shown in FIG. 5, the term "upper" as used in the present specification means a direction toward the upper side in the vertical direction with respect to the upper end of the buried structure installed on the horizontal plane, and is "lower". Is the direction toward the lower side in the vertical direction.

First, FIG. 1 shows a base member 100 constituting the fall prevention device of the present invention. 1 (a) is an overall perspective view of the base member 100, FIG. 1 (b) is a plan view of the base member 100, FIG. 1 (c) is a side view of the base member 100, and FIG. 1 (d) is a base member. A front view of the 100 and FIG. 1 (e) is a rear view of the base member 100.

As shown in FIG. 1, the base member 100 is a substantially U-shaped member made entirely of metal, and has a flat plate-shaped upper wall 110 and a plate-shaped extending downward from the front end 111 of the upper wall 110. The outer wall 120 and the plate-shaped inner wall 130 extending downward from the rear end 112 of the upper wall 110 are provided. Further, a mounting hole 113 penetrating vertically is provided on the rear end 112 side of the upper wall 110, and an intermediate member described later is mounted in the mounting hole 113. Further, a mark hole 114 penetrating vertically is formed in the front end 111 of the upper wall 110, and when the base member 100 is attached to the upper end of the buried structure, the mark hole 114 is used to form a mark hole 114 in the buried structure. A mark of the mounting location of the base member 100 can be attached to the upper end with an oil-based pen or the like. Further, the inner wall 130 is provided with mounting holes 131 penetrating the front and rear, and a movable fixing member described later can be mounted.

The vertical length L3 of the outer wall 120 is longer than the vertical length L4 of the inner wall 130. As will be described later, since the outer wall 120 is a portion to be inserted by making a groove in a part of the road surface, the outer wall 120 can be firmly inserted into the groove of the road surface by increasing the vertical length L3 of the outer wall 120. However, the length L3 of the outer wall 120 is longer than the length L4 of the inner wall 130, but the length L3 of the outer wall 120 is shorter than the length L4 of the inner wall 130, or the outer wall 120 is not limited to this. The length L3 of may be equal to the length L4 of the inner wall 130.

Further, the width L1 between the outer wall 120 and the inner wall 130 is wider than the width L2 (see FIG. 6) of the upper end of the buried structure described later. Further, the base member 100 is formed by bending a single metal plate into a shape as shown in FIG. 1, but is not limited to this, and the upper wall 110, the outer wall 120, and the inner wall are individually manufactured. 130 may be formed by welding and assembling into a shape as shown in FIG.

Next, with reference to FIG. 2, a state in which the intermediate member 200 and the movable fixing member 300 are attached to the base member 100 will be described. 2 (a) is an overall perspective view of the base member 100 with the intermediate member 200 and the movable fixing member 300 attached, FIG. 2 (b) is a side view of the state, and FIG. 2 (c) is the state. 2 (d) is a rear view of the above state.

As shown in FIG. 2, the intermediate member 200 includes a long nut 210 and a long bolt 220, and two intermediate members 200 are attached so as to project upward from the base member 100. Specifically, the tip 221 side of the bolt 220 is inserted into each mounting hole 113 provided in the upper wall 110 of the base member 100 from below, and a nut is inserted into the tip 221 of the bolt 220 protruding upward from the mounting hole 113. Screw 210. Then, if the bolt 220 is strongly tightened, the nut 210 and the head 222 of the bolt 220 strongly sandwich the upper wall 110 from above and below the mounting hole 113, and the intermediate member 200 is firmly fixed to the base member 100. be. Further, bolts of a fence member, which will be described later, are screwed and fixed to the upper end of the nut 210. The intermediate member 200 is arranged so as to be displaced toward the inner wall 130 side from the center of the base member 100, but the present invention is not limited to this, and the intermediate member 200 may be arranged at an arbitrary position on the upper wall 110 of the base member 100. good. Further, the intermediate member 200 has a configuration including a nut 210 and a bolt 220, but the present invention is not limited to this, and any configuration can be adopted as long as the base member 100 and the fence member described later can be connected. For example, the intermediate member 200 may be configured to include only the bolt 220 without the nut 210 and directly connect the tip 221 side of the bolt 220 to the fence member described later.

Next, the movable fixing member 300 includes a long bolt 310, a pair of nuts 320, and a contact member 330, and is attached to the inner wall 130. Specifically, the mounting hole 131 is inserted through each mounting hole 131 of the inner wall 130 from the outside on the tip 312 side of the shaft portion 311 of the bolt 310, and is screwed into the shaft portion 311 of the bolt 310 by a pair of nuts 320. By firmly sandwiching the surrounding inner wall 130 from both sides, the movable fixing member 300 is firmly fixed to the inner wall 130. Further, a flat contact member 330 that contacts the inner surface of the upper end of the buried structure, which will be described later, is attached to the tip 312 of the bolt 310. Then, as will be described later, when the movable fixing member 300 is moved toward the inner surface of the upper end of the buried structure, the nut 320 is loosened and then the bolt 310 is moved back and forth to embed the contact member 330. If the pair of nuts 320 are strongly tightened while in contact with the inner surface of the upper end of the structure, the movable fixing member 300 will be strongly fixed again.

The movable fixing member 300 includes a bolt 310, a pair of nuts 320, and a contact member 330, but the present invention is not limited to this, and the movable fixing member 300 moves to the inner surface of the upper end of the buried structure. Any configuration can be adopted as long as it can be fixed in contact with the inner surface. Further, instead of the movable fixing member 300, an anchor member that is screwed and fixed to the inner surface of the upper end of the buried structure may be provided. When fixing this anchor member, a hole is made in the inner surface of the upper end of the buried structure, but since the inner side surface of the upper end is a flat surface extending widely in the vertical and horizontal directions, a hole is made in the anchor member. Even if it is screwed in, it does not significantly affect the strength of the upper end of the buried structure.

Next, FIG. 3 shows the fence member 400. 3 (a) is a front view of the fence member 400, FIG. 3 (b) is a plan view of the fence member 400, FIG. 3 (c) is a left side view of the fence member 400, and FIG. 3 (d) is a fence member. The left side view of the 400, the left side view with the fixing bolt attached, FIG. 3 (e) is the right side view of the fence member 400, and FIG. 3 (f) is the right side view of the fence member 400. It is a right side view with a fixing bolt attached.

As shown in FIG. 3, the fence member 400 is a long metal member having a hollow inside, and is formed by one end of the upper wall 410 (left side in FIGS. 3A and 3B) and the lower wall 420. Each end is provided with a fixing hole 411 and a fixing hole 421 which are arranged vertically in a straight line. Further, the other end of the upper wall 410 (on the right side in FIGS. 3A and 3B) and the other end of the lower wall 420 each have a long fixing groove 412 and a fixing groove extending in parallel with each other. 422 is provided. Then, as shown in FIG. 3D, on one end side of the fence member 400, the shaft portion 431 of the long bolt 430 is inserted into the upper and lower fixing holes 411 and the fixing holes 421, and is downward from the lower wall 420. One end side of the fence member 400 is connected to the intermediate member 200 by screwing the tip 432 protruding to the nut 210 of the intermediate member 200 fixed to the base member 100. Since one end side of the fence member 400 is fixed to the intermediate member 200 by inserting the bolt 430 into the fixing hole 411 and the fixing hole 421, the fence member 400 is rotated around the bolt 430 at a desired angle. Can be connected and fixed.

Similarly, as shown in FIG. 3 (f), on the other end side of the fence member 400, the shaft portion 431 of the long bolt 430 is inserted into the upper and lower fixing grooves 412 and the fixing grooves 422, and the lower wall 420 The other end side of the fence member 400 is connected to the intermediate member 200 by screwing the tip 432 protruding downward from the nut 210 of the intermediate member 200 fixed to the base member 100. Since the fixing groove 412 and the fixing groove 422 extend in a long shape, the mounting position of the bolt 430 can be changed as appropriate. Further, since the other end side of the fence member 400 has a mode in which the bolt 430 is inserted into the fixing groove 412 and the fixing groove 422 and fixed to the intermediate member 200, the fence member 400 is rotated around the bolt 430 to a desired angle. Can be connected and fixed with. In FIG. 3, the fence member 400 is a long member having a substantially rectangular cross section, but the present invention is not limited to this, and a long member having a substantially U-shaped cross section can prevent a person, a vehicle, or the like from falling. If there is, any shape can be adopted. Further, a reflector or the like may be attached to the fence member 400 in order to call attention to a person, a vehicle or the like.

Next, a method of installing the fall prevention metal fitting of the present invention will be described with reference to FIGS. 4 to 6. Note that FIG. 4A is a plan view of the buried structure 900, and FIG. 4B is a plan view of the buried structure 900 in a state where the base member 100 of the fall prevention tool 500 is attached. 4 (c) is a cross-sectional view taken along the line AA, FIG. 5 (a) is a plan view of the fall prevention tool 500 attached to the buried structure 900, and FIG. 5 (b) is a fall prevention tool 500 embedded. A front view and FIG. 6 in a state of being attached to the structure 900 are cross-sectional views taken along the line BB of FIG. 5 (a). The fall prevention tool 500 includes a base member 100, an intermediate member 200, a fence member 400, and optionally includes a movable fixing member 300.

First, as shown in FIG. 4A, the buried structure 900 is provided with a water channel 910 on the inside and side walls 920 rising upward on both sides thereof (because the water channel 910 is wide, only one side of the water channel is shown in the drawing). ing). The buried structure 900 is buried in the road surface X1 made of asphalt or soil, and the upper end 930 of the side wall 920 is substantially flush with the road surface X1. In FIG. 4, the direction of the water channel 910 is changed in the vicinity of the center of the buried structure 900, and the shape is abbreviated. However, the buried structure 900 is not limited to this, and the buried structure 900 is linear or curved. It may have any shape such as a shape.

When the fall prevention tool 500 is attached to the side wall 920 of the buried structure 900, the road surface X1 is dug downward to provide a plurality of grooves X2 at the boundary portion between the outer surface 931 of the upper end 930 of the side wall 920 and the road surface X1. .. The groove X2 has a size into which the outer wall 120 of the base member 100 can be inserted. Further, the distance between the grooves X2 is substantially equal to the total length of the fence member 400. The groove X2 is formed by a worker manually or automatically digging with an excavator. Further, if the road surface X1 is lower than the upper end 930 of the buried structure 900 and the outer wall 120 of the base member 100 can be arranged as it is on the outer surface 931 of the upper end 930 of the buried structure 900, it is not necessary to provide the groove X2.

Next, as shown in FIGS. 4 (b) and 4 (c), the base member 100 of the fall prevention tool 500 is attached to the upper end 930 of the side wall 920 of the buried structure 900. Specifically, the outer wall 120 of the base member 100 is inserted into the groove X2, and the outer wall 120 of the base member 100 is arranged on the outer surface 931 of the upper end 930 of the embedded structure 900. Further, the upper wall 110 of the base member 100 is arranged on the upper surface 932 of the upper end 930, and the inner wall 130 of the base member 100 is arranged on the inner side surface 933 of the upper end 930. In this way, the substantially U-shaped base member 100 is attached so as to cover the upper end 930 of the buried structure 900. Since the outer wall 120 of the base member 100 is inserted into the groove X2, the outer wall 120 of the base member 100 is sandwiched in the groove X2, and the base member 100 is less likely to come off from the upper end 930 of the buried structure 900. There is.

Here, as shown in FIG. 4C, the width L1 between the outer wall 120 and the inner wall 130 of the base member 100 is wider than the width L2 of the upper end 930 of the buried structure 900. This is because the width L2 of the upper end 930 differs depending on the type of the buried structure 900, so the width L1 between the outer wall 120 and the inner wall 130 of the base member 100 is made wider than the width L2 of the upper end 930, and the base member 100 Was made to be attached to various types of buried structures 900.

Then, as shown in FIG. 4C, the width L1 between the outer wall 120 and the inner wall 130 of the base member 100 is wider than the width L2 of the upper end 930 of the buried structure 900, so that the upper end 930 A space S1 exists between the inner side surface 933 and the inner wall 130 of the base member 100. Therefore, the movable fixing member 300 is used to firmly attach the base member 100 to the upper end 930 of the buried structure 900. Specifically, after loosening the nut 320 of the movable fixing member 300, the bolt 310 is moved toward the inner side surface 933 of the upper end 930 of the embedded structure 900, and the contact member 330 at the tip 312 of the bolt 310 is moved. It is brought into contact with the inner side surface 933 of the upper end 930. In this state, if the inner wall 130 is strongly tightened by a pair of nuts 320 so as to sandwich the inner wall 130 from both sides, the bolt 310 is fixed so as not to move, and the contact member 330 at the tip of the bolt 310 hits the inner surface 933 of the upper end 930. The state of contact can be firmly maintained. In this way, the base member 100 is firmly attached to the upper end 930 of the buried structure 900 so as to sandwich the upper end 930 of the buried structure 900. If the width L1 between the outer wall 120 and the inner wall 130 of the base member 100 and the width L2 of the upper end 930 of the buried structure 900 are substantially equal, it is not necessary to attach the movable fixing member 300.

Next, after the base member 100 is attached to the upper end 930 of the buried structure 900, the fence member 400 is connected to the intermediate member 200 protruding upward from the base member 100 as shown in FIGS. 5 and 6. Specifically, one end and the other end of the fence member 400 are addressed above each intermediate member 200 of the adjacent base member 100, and the shaft of the bolt 430 is placed on one end side (left side in the drawing) of the fence member 400. By inserting the portion 431 into the fixing hole 411 and the fixing hole 421 and screwing the tip 432 of the bolt 430 protruding downward from the lower wall 420 into the nut 210 of the intermediate member 200, one end side of the fence member 400 is intermediate. It is connected to the member 200. Similarly, on the other end side (right side in the drawing) of the fence member 400, the shaft portion 431 of the bolt 430 is inserted into the fixing groove 412 and the fixing groove 422, and the tip 432 of the bolt 430 protruding downward from the lower wall 420 is inserted. By screwing it into the nut 210 of the intermediate member 200, the other end side of the fence member 400 is connected to the intermediate member 200. In this way, both ends of the fence member 400 are firmly connected and fixed between the adjacent base members 100. Since the fence member 400 is connected to the intermediate member 200 by inserting the bolt 430 into the fixing hole or the fixing groove, the fence member 400 is rotated around the intermediate member 200 to be connected and fixed at a desired angle. be able to. Therefore, as shown in FIG. 5A, the fence member 400 can be arranged along the buried structure 900 bent in an abbreviated shape, that is, along the shape of the buried structure 900. be.

As described above, in the fall prevention tool 500 of the present invention, the outer wall 120 of the base member 100 is arranged on the outer surface 931 of the upper end 930 of the embedded structure 900, and the upper wall 110 of the base member 100 is arranged on the upper surface 932 of the upper end 930. The inner wall 130 of the base member 100 is arranged on the inner side surface 933 of the upper end 930, and the substantially U-shaped base member 100 is attached so as to cover the upper end 930 of the buried structure 900. Therefore, unlike the prior art, it is not necessary to provide a deep fixing hole in the upper end 930 of the buried structure 900 for erecting a support column, and it is possible to prevent a decrease in strength of the upper end 930 of the buried structure 900.

Further, as shown in FIG. 5B, since the fence member 400 of the fall prevention device 500 is attached to the intermediate member 200 protruding upward from the base member 100 attached to the upper end 930 of the buried structure 900. The fence member 400 is surely arranged above the upper end 930 of the buried structure 900, and can effectively prevent people, vehicles, and the like from falling into the water channel of the buried structure 900.

Further, as shown in FIG. 5B, since the base member 100 of the fall prevention device 500 includes two intermediate members 200, when the fence members 400 are connected to both sides of the base member 100, each intermediate member is provided. Since the fence member 400 can be attached to the 200, the degree of freedom in arranging the fence member 400 is increased, for example, the heights of the adjacent fence members 400 are made uniform.

Further, as shown in FIGS. 5A and 6, since the intermediate member 200 is provided so as to be offset toward the inner wall 130 side from the center of the base member 100, the intermediate member 200 and the fence member 400 are provided on the road surface. It will be placed on the waterway side of the buried structure 900 away from X1. Therefore, the intermediate member 200 and the fence member 400 of the fall prevention device 500 do not narrow the road width of the road surface X1. Further, since the intermediate member 200 and the fence member 400 are arranged on the waterway side of the inner side surface 933 of the upper end 930 of the buried structure 900, the space above the upper end 930 of the buried structure 900 can be effectively utilized. can.

Further, as shown in FIG. 6, the width L1 between the outer wall 120 and the inner wall 130 of the base member 100 is wider than the width L2 of the upper end 930 of the buried structure 900, so that the inner side surface 933 of the upper end 930 is wider. A space S1 exists between the base member 100 and the inner wall 130 of the base member 100. Therefore, when the intermediate member 200 is attached to the base member 100, a part of the intermediate member 200 (for example, a bolt 220) can be arranged in the space S1, and the space S1 is effective for attaching the intermediate member 200. Can be used for. Further, by arranging the intermediate member 200 and the fence member 400 above the space S1, the intermediate member 200 and the fence member 400 are arranged away from the road surface X1 and closer to the water channel side of the buried structure 900. Therefore, the intermediate member 200 and the fence member 400 of the fall prevention tool 500 can effectively utilize the road surface X1 without narrowing the road width of the road surface X1.

(Embodiment 2)
Then, the fall prevention device 500A of the second embodiment of the present invention will be described below with reference to FIGS. 7 (a) and 7 (b). The fall prevention tool 500A according to the second embodiment has a fence member 400A different from the fence member 400 of the fall prevention tool 500 according to the first embodiment, but other configurations are common, and detailed description thereof will be omitted. .. 7 (a) is a front view of the fall prevention tool 500A, and FIG. 7 (b) is an enlarged side view of the vicinity of the intermediate member 200A of the fall prevention tool 500A.

As shown in FIG. 7A, the fence member 400A of the fall prevention device 500A has gratings assembled in a grid pattern, and a plurality of main members 440A arranged in parallel and the main members 440A are connected to each other. It includes a crossbar 450A to be connected, a main member 440A assembled in a grid pattern, and an end member 460A surrounding the outside of the crossbar 450A. Then, in a state where the fence member 400A is erected so as to extend in the vertical direction, the bolt 430A is inserted through the through hole 461A provided in the end member 460A, and the shaft portion 431A of the bolt 430A is inserted into the intermediate member 200A. The fence member 400A is connected and fixed to the intermediate member 200A by being screwed into the nut 210A. As described above, the fence member 400A has a prismatic shape as shown in FIG. 3 and a grating shape as shown in FIG. 7 as long as it can prevent a person, a vehicle, or the like from falling into the waterway. May be adopted.

(Embodiment 3)
Then, the fall prevention device 500B of the third embodiment of the present invention will be described below with reference to FIGS. 8A and 8B. The structure of the intermediate member 200B of the fall prevention tool 500B according to the third embodiment is different from that of the intermediate member 200A of the fall prevention tool 500A according to the second embodiment, but other configurations are common, and detailed description thereof will be omitted. .. 8 (a) is a front view of the fall prevention tool 500B, and FIG. 8 (b) is an enlarged side view of the periphery of the intermediate member 200B of the fall prevention tool 500B.

As shown in FIG. 8, the fence member 400B having a grid-like grating mode is connected to the intermediate member 200B in a state of being inclined diagonally upward toward the waterway side. Specifically, the intermediate member 200B includes a base end portion 230B fixed to the base member 100B by bolts 220B, and an extension portion 240B that projects upward from the base end portion 230B and extends diagonally upward. Further, the fence member 400B is fixed to the extension portion 240B by bolts 430B. Since the fence member 400B is inclined toward the waterway side, the edge portion of the waterway can be covered, so that not only is it possible to prevent people, vehicles, etc. from falling into the waterway, but also, for example, the edge portion of the waterway. It is possible to prevent objects and debris from falling into the waterway from above.

(Embodiment 4)
Then, the fall prevention device 500C of the fourth embodiment of the present invention will be described below with reference to FIGS. 9 (a) and 9 (b). The fall prevention tool 500C according to the fourth embodiment has different configurations of the intermediate member 200C and the fence member 400C from the intermediate member 200 and the fence member 400 of the fall prevention tool 500 according to the first embodiment, but other configurations are common. Therefore, detailed description will be omitted. 9 (a) is a front view of the fall prevention tool 500C, and FIG. 9 (b) is a side view of the fall prevention tool 500C.

As shown in FIG. 9, the intermediate member 200C of the fall prevention tool 500C includes a nut 210C, and one is attached so as to project upward from the base member 100C. The nut 210C may be fixed to the upper wall 110C of the base member 100C by welding or the like, or may be fixed to the upper wall 110C with a bolt or the like. Then, the fence member 400C is connected to the intermediate member 200C protruding upward from the base member 100C. Specifically, one end of the fence member 400C on the right side is placed above the intermediate member 200C, and the other end of the fence member 400C on the left side is placed on one end of the fence member 400C on the right side. Then, the upper and lower fixing holes 411C and the fixing holes 421C of the fence member 400C on the right side and the upper and lower fixing holes 411C and the fixing holes 421C of the fence member 400C on the left side are linearly aligned vertically, and each fixing hole is in that state. Insert the bolt 430C so that it penetrates through. Then, by screwing the tip 432C of the shaft portion 431C of the bolt 430C into the nut 210C of the intermediate member 200C, the two fence members 400C are connected to the intermediate member 200C. Further, since each fence member 400C has a mode in which the bolt 430C is inserted into the fixing hole and connected to the intermediate member 200C, each fence member 400C is rotated around the intermediate member 200C to be connected and fixed at a desired angle. Can be done. As described above, in the fall prevention tool 500C of the present invention, one intermediate member 200C is provided on the base member 100C, and the fence members 400C on both sides are rotatably connected and fixed by the intermediate member 200C. The fall prevention tool 500C is not limited to including one intermediate member 200C, and may include two intermediate members or three or more intermediate members.

The method of installing the fall prevention device and the fall prevention device of the present invention is not limited to the above embodiment, and various modifications and combinations are possible within the scope of claims and the scope of embodiments. These variations and combinations are also included in the scope of rights.

Claims (6)

A fall prevention device that is attached to a buried structure provided with a waterway to prevent it from falling into the waterway.
A base member attached to the upper end of the side wall of the buried structure and
An intermediate member attached to the base member and
A fence member connected to the intermediate member is provided.
The base member includes an outer wall arranged on the outer surface of the upper end of the side wall of the buried structure, an upper wall arranged on the upper surface of the upper end of the side wall of the buried structure, and the upper end of the side wall of the buried structure. With an inner wall placed on the inner side,
The fall prevention tool, wherein the base member is attached to the outer wall, the upper wall, and the inner wall so as to cover the upper end of the side wall of the buried structure.
The inner wall of the base member is provided with a movable fixing member that can move toward the inner side surface of the upper end of the buried structure and can be fixed in a state of being in contact with the inner side surface. The fall prevention device according to claim 1.
The fall prevention tool according to claim 1 or 2, wherein the fence member is rotatably connected to the intermediate member.
The fall prevention tool according to any one of claims 1 to 3, wherein the intermediate member is provided in two on the base member.
The fall prevention tool according to any one of claims 1 to 4, wherein the intermediate member is provided on the inner wall side of the center of the base member.
The method for installing the fall prevention device according to any one of claims 1 to 5.
At the boundary between the upper end of the side wall of the buried structure and the road surface in which the buried structure is buried, the road surface is dug down to form a groove.
A method for installing a fall prevention tool, characterized in that the outer wall of the base member is inserted into the groove, and the base member is attached to the upper end of a side wall of the buried structure.

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