Protective material for the drift catcher

Abstract

To provide a protection member capable of protecting a flowing-down object catcher, without causing increase in the weight and cost of the flowing-down object catcher, and without lowering the workability.SOLUTION: A flowing-down object catcher 1 capturing debris flow and stone fall has multiple columns 2a-2c, a net body 7 extended between each of the columns 2a, 2b and 2c, and rope bodies 9a and 9b supporting each of the columns 2a and 2c. Column protection members 20a-20c and 30a-30c are attached to each of the columns 2a-2c; net body protection members 40a-40f are attached to a net body 7 and a support member 8 passing through the upper part of the net body 7; and rope body protection members 50a, 50b are attached to each of the rope bodies 9a, 9b, respectively. Each of the column protection members 20a-20c, 30a-30c, net body protection members 40a-40f, and rope body protection members 50a, 50b is constituted of a rubber material as a main material.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a protective member, and more particularly to a protective member attached to a flow-off object capture body that captures debris flow and falling rocks. [Background technology]

[0002] Various types of equipment have been proposed so far as equipment for catching debris such as debris flows and falling rocks on mountain slopes and in mountain streams to reduce damage from debris flows and falling rocks disasters. For example, such equipment uses a ring-type net as described in Patent Document 1. In addition, the following type of debris catching device using a ring-type net has also been proposed.

[0003] FIG. 11 is a schematic front view of a conventional drift object capture body.

[0004] Referring to the figure, the drift object capture body 81 comprises a plurality of pillars 82a, 82b and 82c, a net body 87 stretched between each of the pillars 82a, 82b and 82c, and rope bodies 89a and 89b supporting each of the pillars 82a and 82c.

[0005] The support pillar 82a is made of H-shaped steel coated with anti-rust paint and stands connected to a support pillar base 84 buried in the ground. The support pillar base 84 is fixed by an anchor 85a. The support pillars 82b and 82c have the same structure as the support pillar 82a.

[0006] The net body 87 is made of a ring-type net consisting of a plurality of connected ring-shaped members covered with a diamond-shaped wire mesh, and a support member 88 made of a wire rope is inserted through the upper part. The net body 87 is arranged so as to cover the downstream side (the back side in the direction perpendicular to the paper surface) of each of the supports 82a, 82b, and 82c.

[0007] Rope body 89a is made of a wire rope coated with an anti-rust paint, and is arranged in a tensioned state between the vicinity of the upper end of the support 82a to which one end 90 is hung and a rope anchor 92 to which the other end 91 is connected. Rope body 89b has a similar configuration to rope body 89a. Although omitted for illustration purposes, a rope body having a similar configuration to rope bodies 89a and 89b is also arranged on the central support 82b, as with the other supports 82a and 82c.

[0008] When a debris flow or rockfall occurs, the debris flows from the upstream side of the debris capture body 81 (the front side in the direction perpendicular to the paper surface) to the downstream side, and is captured on the upstream side of the debris capture body 81. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2019-132000 A Summary of the Invention [Problem to be solved by the invention]

[0010] The conventional drift material capture body 81 as described above is likely to be corroded due to wear and peeling of the supports 82a, 82b, and 82c and the rope bodies 89a and 89b caused by collision of drift material and constant flowing water when installed in a mountain stream. In addition, drift material may collide with the head of the anchor 85 exposed on the ground surface, which may damage the anchor 85. Furthermore, when drift material accumulates up to the upper end of the drift material capture body 81 and flows over the top of the net body 87, the drift material may rub against the support member 88, which may cause wear and corrosion of the support member 88. In other words, the conventional drift material capture body 81 has a problem with durability. Furthermore, if the thickness of the posts 82a, 82b, and 82c or the diameter of the rope bodies 89a, 89b, and support member 88 are increased in consideration of wear and corrosion, other problems may arise, such as increased component weight, reduced ease of installation, and increased costs.

[0011] This invention has been made to solve the above-mentioned problems, and aims to provide a protective member that can protect a flow-down object capture body without increasing the weight and cost of the flow-down object capture body and without reducing ease of installation. [Means for solving the problem]

[0012] In order to achieve the above object, the invention described in claim 1 is a protective member attached to a flow-off object capture body including a net body for capturing debris flow and falling rocks, the protective member being made of a flexible elastic body and capable of covering at least a part of the flow-off object capture body, The downstream object capture body includes a support pillar that is fixed to the ground to support the net body and is installed so as to extend in a substantially vertical direction, and can cover at least a part of the upstream side of the support pillar. The downstream object capture body has a front wall portion provided on the upstream side of the support pillar, and a pair of side wall portions that extend continuously from both ends of the front wall portion and face each other, and can surround at least a part of the upstream side of the support pillar on the inner side of each of the front wall portion and the pair of side wall portions. It is something.

[0013] With this configuration, the durability of the flow-down object capture body is improved without increasing the thickness or diameter of each of the constituent members of the flow-down object capture body. In addition, debris flowing from the upstream side will not hit the support directly. Furthermore, the protection range of the support is expanded.

[0018] Claim 2 The invention described is as follows: 1 In the configuration of the described invention, the front wall portion and the pair of side walls can each enclose, on their inner sides, an anchor head for further fixing the base of the support column.

[0019] With this configuration, the protective range extends to the anchor head.

[0020] Claim 3 The invention described is as follows: 1 or claims 2 In the configuration of the described invention, the pair of side wall portions each have a pair of projections on their inner surfaces that protrude inward and are configured to be able to engage with the flanges of the support column made of H-shaped steel.

[0021] With this configuration, the protective member can be attached and removed without processing the support posts.

[0024] Claim 4 The invention described is A protective member to be attached to a drift object capture body including a net body for capturing debris flow and falling rocks, the protective member being made of a flexible elastic body, capable of covering at least a part of the drift object capture body, and capable of covering at least a part of the upper part of the net body of the drift object capture body,It can surround the upstream side, upper end side and downstream side of the upper part of the net body.

[0025] When configured like this, The durability of the drift object capture body is improved without increasing the thickness or diameter of each of the constituent members of the drift object capture body. In addition, even if drift objects flow over the net body, they do not directly strike the upper part of the net body. The protection range of the net body is expanded.

[0026] Claim 5 The invention described is as follows: 4 In the configuration of the described invention, opposing ends below the upper part of the net body are joined with bolts from the upstream direction to the downstream direction with the net body sandwiched between them.

[0027] With this configuration, the protective member can be attached and removed without processing the net body.

[0032] Claim 6 The invention described is A protective member to be attached to a drift object capture body including a net body for capturing debris flows and falling rocks, the protective member being made of a flexible elastic body, capable of covering at least a part of the drift object capture body, capable of covering at least a part of the upstream side of the rope body of the drift object capture body, having a hollow cylindrical shape, and having an open portion formed from one end to the other end, The device further includes an adhesive means for closing the opening after fitting onto the rope body.

[0033] When configured like this, The durability of the drift object capture body is improved without increasing the thickness or diameter of each of the constituent members of the drift object capture body. In addition, drift objects do not hit the rope body directly. Furthermore, the protective member can be opened through the opening portion, and can be fitted into the rope body. Furthermore, Once installed, the opening becomes difficult to open. Effect of the Invention

[0034] As explained above, the invention described in claim 1 improves the durability of the flow-down object capture body without increasing the thickness or diameter of each of the constituent parts of the flow-down object capture body, thereby making it possible to protect the flow-down object capture body without increasing the weight and cost of the flow-down object capture body or reducing its ease of installation. In addition, since the downstream debris from the upstream side does not directly strike the support, a high degree of wear prevention effect can be obtained even in a narrow installation area. Furthermore, since the protected area of ​​the support is expanded, a higher degree of wear prevention effect can be obtained.

[0037] Claim 2 The invention described is as follows: 1 In addition to the effects of the invention described above, the protective range extends to the anchor head, providing a higher degree of wear protection.

[0038] Claim 3 The invention described is as follows: 1 or claims 2In addition to the effects of the invention described above, the protective member can be attached and removed without processing the support posts, resulting in a protective member that is easy to install and replace.

[0040] Claim 4 The invention described is The durability of the flow-down object capture body is improved without increasing the thickness or diameter of each of the constituent members of the flow-down object capture body, so the flow-down object capture body can be protected without increasing the weight and cost of the flow-down object capture body and without reducing workability. Even if the flow-down object flows over the net body, it does not directly hit the upper part of the net body, so a high wear prevention effect can be obtained even in a narrow installation area. Furthermore, The protective range of the net body is expanded, providing greater abrasion prevention effect.

[0041] Claim 5 The invention described is as follows: 4 In addition to the effects of the invention described above, the protective member can be attached and detached without processing the net body, resulting in a protective member that is easy to install and replace.

[0044] Claim 6 The invention described is The durability of the flow-down object capture body is improved without increasing the thickness or diameter of each of the constituent parts of the flow-down object capture body, so the flow-down object capture body can be protected without increasing the weight and cost of the flow-down object capture body or reducing workability. Also, since the flow-down object does not hit the rope body directly, a high abrasion prevention effect can be obtained even in a narrow installation area. Furthermore, by opening the protective member through the opening, the protective member can be fitted into the rope body, making it a protective member that is easy to install and replace. Furthermore, The opening is less likely to open after installation, so the installation state is stable. [Brief description of the drawings]

[0045] [Figure 1] 1 is a schematic front view of a flow-down object capture body equipped with a pole protective member, a net body protective member, and a rope body protective member according to a first embodiment of the present invention. FIG. [Diagram 2] FIG. 2 is an enlarged side view of the line II-II shown in FIG. [Diagram 3] 3 is an enlarged end view of the line III-III shown in FIG. 2. [Figure 4] FIG. 2 is an enlarged view of the line IV-IV shown in FIG. [Diagram 5] FIG. 5 is an enlarged end view of the VV line shown in FIG. [Figure 6] FIG. 2 is an enlarged view of the VI-VI line shown in FIG. [Figure 7] 7 is a rear view of the rope body protection member shown in FIG. 6. [Figure 8] FIG. 7 is an enlarged cross-sectional view taken along line VIII-VIII shown in FIG. 6. [Figure 9]FIG. 5 is an enlarged front view of a flowing-off object capturing body equipped with a net body protective member according to a second embodiment of the present invention, and corresponds to FIG. 4 of the first embodiment. [Figure 10] FIG. 10 is an enlarged end view of the XX line shown in FIG. [Figure 11] FIG. 1 is a schematic front view of a conventional drift object capture body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0046] Figure 1 is a schematic front view of a flow-down object capture body equipped with a pole protective member, a net body protective member and a rope body protective member according to the first embodiment of the present invention, Figure 2 is an enlarged side view of the II-II line shown in Figure 1, Figure 3 is an enlarged end view of the III-III line shown in Figure 2, Figure 4 is an enlarged view of the IV-IV line shown in Figure 1, Figure 5 is an enlarged end view of the VV line shown in Figure 4, Figure 6 is an enlarged view of the VI-VI line shown in Figure 1, Figure 7 is a rear view of the rope body protective member shown in Figure 6, and Figure 8 is an enlarged cross-sectional view of the VIII-VIII line shown in Figure 6.

[0047] 1 and 2, a flow-down object capture body 1 for capturing debris flow and falling rocks includes a plurality of supports 2a, 2b, and 2c, a net body 7 stretched between each of the supports 2a, 2b, and 2c, and rope bodies 9a and 9b supporting each of the supports 2a and 2c. Support protection members 20a, 20b, 20c and 30a, 30b, and 30c are attached to each of the supports 2a, 2b, and 2c fixed to the ground via a support base 4 to support the net body 7, net body protection members 40a, 40b, 40c, 40d, 40e, and 40f are attached to a support member 8 that passes through the upper part of the net body 7, and rope body protection members 50a and 50b are attached to each of the rope bodies 9a and 9b. Although omitted for the sake of illustration, it is assumed that the central support 2b is also provided with a rope body equipped with a rope body protective member, similar to the other supports 2a and 2c. Each of the support protection members 20a-20c, 30a-30c, the net body protection members 40a-40f, and the rope body protection members 50a and 50b is made mainly of rubber. The effect of this configuration will be described later. Each of the support protection members 20a-20c, 30a-30c, the net body protection members 40a-40f, and the rope body protection members 50a and 50b weighs 25 kg or less. This configuration allows the unit to be carried by one person, making installation easy.

[0048] When a debris flow or rockfall occurs, the debris flows from the upstream side (the front side in the direction perpendicular to the paper surface) of the drift material capture body 1 toward the downstream side (the rear side in the direction perpendicular to the paper surface) and is captured on the upstream side of the drift material capture body 1. As will be described later, the support pillar 2a is freely rotatable from the upstream side to the downstream side with respect to the support pillar base 4, and the support pillars 2b and 2c have the same configuration as the support pillar 2a, and the rope body 9a extends further as the diameter of the brake ring 14 becomes smaller, and the rope body 9b is also configured in the same manner as the rope body 9a, so that when the drift material collides with the drift material, the drift material capture body 1 deforms so as to tilt toward the downstream side, capturing the drift material while mitigating the collision energy and collision load of the drift material.

[0049] 1 and 2, the support pillar 2a is made of H-shaped steel that has been subjected to rust prevention treatment such as hot-dip galvanization, and is installed so as to extend in a substantially vertical direction while being rotatable with respect to the support pillar foundation 4 buried in the ground as described above via the hinge 3 provided at the lower end. The support pillar foundation 4 is fixed by anchors 5a and 5b that are drilled from the upper surface of the support pillar foundation 4 to the ground. The head of the upstream anchor 5a is exposed above the ground surface.

[0050] The pole protective members 20a to 20c and 30a to 30c, the net protective members 40a to 40f, and the rope body protective members 50a and 50b will be described below in order.

[0051] First, referring to Fig. 3 in addition to Fig. 1 and Fig. 2, the pole protection member 20a has a front wall portion 21 facing the upstream side, and a pair of side walls 22a and 22b extending continuously downstream from both ends of the front wall portion 21 and facing each other, and is formed into a substantially U-shaped cross section in the short side direction. The length of the pole protection member 20a in the longitudinal direction is set to 1000 mm, the length in the depth direction (from the upstream side to the downstream side) is set to 115 mm, and the length in the short side direction is set to 250 mm. The front wall portion 21 and the side walls 22a and 22b are made of a rubber material with a thickness of 25 mm and are formed integrally. The side walls 22a and 22b are provided with bolt insertion holes 23a, 23b, 23c and 24a, 24b, 24c at predetermined intervals, and reinforcing steel plates 25a and 25b are embedded inside the side walls 22a and 22b around the bolt insertion holes 23b and 24b. The other bolt insertion holes 23a, 23c and 24a, 24c are similarly configured around the other bolt insertion holes. A pair of protrusions 26a and 26b made of steel plates is attached to the inner surface of each of the side walls 22a and 22b so as to protrude toward the inner side of each of the side walls 22a and 22b. The pair of protrusions 26a is attached via a bolt 27a inserted from the outer side of the side wall 22a through the bolt insertion hole 23b and a bolt similarly inserted through the other bolt insertion holes 23a and 23c. Similarly, the pair of protrusions 26b are attached via a bolt 27b inserted from the outer side of the side wall 22b through the bolt insertion hole 24b and bolts inserted through the other bolt insertion holes 24a and 24c. The pair of protrusions 26a and 26b are both attached with their upstream ends spaced apart from the front wall 21 by a distance equivalent to the thickness of the flange 6 of the pillar 2a, and can be engaged with the flange 6 when the pillar protection member 20a is attached to the pillar 2a. The effects of this configuration will be described later.

[0052] The pole protection member 30a has a structure similar to that of the pole protection member 20a, but further has cutouts 37a and 37b formed in the side walls 32a and 32b, respectively, so that the pole protection member 30a can be bent toward the front wall 31, i.e., toward the upstream side. The effect of this structure will be described later.

[0053] When installing the pillar protective member 20a, the inner side of the front wall portion 21 is placed against the upstream surface of the pillar 2a, and the pair of protrusions 26a and 26b are engaged with the flange portion 6 of the pillar 2a so as to surround a portion of the upstream side of the pillar 2a on the inner side of the front wall portion 21 and the pair of side wall portions 22a and 22b.

[0054] With this configuration, within the range where the support pillar protective member 20a is attached, the downstream material flowing from the upstream side hits the support pillar protective member 20a and does not directly hit the support pillar 2a, so a high wear prevention effect can be obtained even in a narrow installation range. In addition, peeling of the paint on the support pillar 2a can be prevented, so a high corrosion prevention effect can be obtained. Furthermore, since not only the upstream surface of the support pillar 2a but also part of the side can be covered, the protection range of the support pillar 2a is expanded, and a higher wear prevention effect and corrosion prevention effect can be obtained. Furthermore, since the support pillar protective member 20a can be attached and removed without processing the support pillar 2a, the support pillar protective member 20a is easy to install and replace.

[0055] On the other hand, the pole protection member 30a is attached to the pole 2a in the same manner as the pole protection member 20a, continuing below the pole protection member 20a, with the portion 38 below the notches 37a and 37b bent upstream. Then, with the pole protection member 30a attached, the head of the upstream anchor 5a is surrounded by the front wall 31 and the pair of side walls 32a and 32b in the lower portion 38. With this configuration, the protective range of the pole protection member 30a extends to the head of the anchor 5a, thereby achieving higher anti-wear and anti-corrosion effects.

[0056] The other pillars 2b and 2c and the pillar protection members 20b, 20c, 30b, 30c have the same configuration and are attached in the same manner as the pillar 2a and the pillar protection members 20a and 30a.

[0057] By configuring in this manner, the durability of the flow-down object capture body 1 is improved without increasing the thickness of the pillars 2a-2c which are the constituent members of the flow-down object capture body 1, so that the flow-down object capture body 1 can be protected without increasing the weight and cost of the flow-down object capture body 1 or reducing its ease of construction.

[0058] 1, 4 and 5, the net body 7 is a ring-type net made up of a plurality of connected ring-shaped members covered with a diamond-shaped wire mesh, and the support member 8 inserted into the upper part is made of a wire rope. The net body 7 is arranged to cover the downstream side of each of the supports 2a to 2c by fixing the support members 8 near the upper end of the downstream side surface of each of the supports 2a to 2c.

[0059] The net body protection members 40a, 40b, 40c are attached to the support member 8 without any gaps between the posts 2a, 2b. The net body protection members 40d, 40e, 40f are also attached in the same manner.

[0060] The net body protective member 40a includes an upper protective portion 41 that covers the upper side of the support member 8, an upstream protective portion 42 that hangs down continuously from the upstream end of the upper protective portion 41, and a downstream protective portion 43 that hangs down continuously from the downstream end of the upper protective portion 41 and faces the upstream protective portion 42, and is formed into a substantially U-shaped cross section in the short side direction. The length of the net body protective member 40a in the longitudinal direction is set to 1000 mm. Each of the upper protective portion 41, the upstream protective portion 42, and the downstream protective portion 43 is made of a rubber material having a thickness of 25 mm and is formed integrally. A pair of connecting bolt insertion holes 44a, 44b, 44c and 45a, 45b, 45c are formed at a predetermined interval in each of the upstream protective part 42 and the downstream protective part 43, and reinforcing steel plates 46a and 46b are embedded inside the upstream protective part 42 and the downstream protective part 43 around each of the connecting bolt insertion holes 44b and 45b. The other connecting bolt insertion holes 44a, 44c and 45a, 45c are configured in the same manner.

[0061] When attaching the net body protective member 40a, first, the net body protective member 40a is covered from above the support member 8, and the upstream side, the upper end side (support member 8), and the downstream side of the upper part of the net body 7 are surrounded by the net body protective member 40a. Next, in this state, i.e., in a state where the net body 7 is sandwiched between the net body protective member 40a, the connecting bolt 47b is inserted from the connecting bolt insertion port 44b of the upstream protective part 42, and the upstream protective part 42 and the downstream protective part 43 are joined from the upstream direction to the downstream direction by the connecting bolt 47b through the connecting bolt insertion port 45b of the net body 7 and the downstream protective part 43. Note that similar joining is performed with the connecting bolts 47a and 47c at the other connecting bolt insertion ports 44a, 44c, and 45a, 45c, and the net body protective member 40a is fixed in a state where a part of the upper part of the net body 7 is covered.

[0062] With this configuration, even if the flowing-down material flows over the net body 7 within the area where the net body protective member 40a is attached, the flowing-down material hits the net body protective member 40a and does not directly hit the upper part of the net body 7 (particularly the support member 8), so a high abrasion prevention effect can be obtained even in a narrow attachment area. In addition, the prevention effect of corrosion due to abrasion can also be obtained. Furthermore, since not only the support member 8 of the net body 7 but also a part of the net body 7 can be surrounded, the protection area of ​​the net body 7 is expanded, and a higher abrasion prevention effect and corrosion prevention effect can be obtained. Furthermore, since the net body protective member 40a can be attached and removed without processing the net body 7, the net body protective member 40a can be easily attached and replaced.

[0063] The other net body protection members 40b to 40f have the same configuration and are attached in the same manner as the net body protection member 40a.

[0064] By configuring in this manner, the durability of the flow-down object capture body 1 is improved without increasing the diameter of the support member 8 of the net body 7, which is a constituent member of the flow-down object capture body 1, so that the flow-down object capture body 1 can be protected without increasing the weight and cost of the flow-down object capture body 1 or reducing its ease of installation.

[0065] 1, 6, 7 and 8, the rope body 9a is made of a wire rope that has been treated for rust prevention by hot-dip galvanizing or the like, and is arranged in a tensioned state between the pillar 2a and the rope anchor 12 while one end 10 formed in a ring shape is hung near the upper end of the pillar 2a and the other end 11 of the rope body 9a is connected to the rope anchor 12 and drilled into the ground to support the pillar 2a. The other end 11 of the rope body 9a is connected to the rope anchor 12 and then folded back and fixed by a plurality of wire clips 13, and a brake ring 14 is formed between the one end 10 and the other end 11.

[0066] The rope body protective member 50a is made of a rubber material with a thickness of 25 mm molded into a hollow cylindrical shape with an axial length of 1000 mm and an inner diameter of 200 mm, and has a slit 53 formed from one end 51 to the other end 52. The effect of this configuration will be described later.

[0067] When attaching the rope body protective member 50a, first, the rope body protective member 50a is opened through the slit 53, and the rope body 9a including the wire clip 13 is covered with the rope body protective member 50a, and the rope body protective member 50a is fitted to the rope body 9a. In this way, the rope body protective member 50a can be fitted to the rope body 9a simply by opening it through the slit 53, so that it can be easily attached and replaced. Furthermore, in the range where the rope body protective member 50a is attached, the downstream object flowing from the upstream side hits the rope body protective member 50a and does not directly hit the rope body 9a, so a high wear prevention effect can be obtained even in a narrow installation range. Furthermore, peeling of the paint of the rope body 9a can be prevented, so a high corrosion prevention effect can be obtained. Furthermore, since the downstream object does not directly hit the wire clip 13, damage to the wire clip 13 and loosening of the rope body 9a due to the damage of the wire clip 13 can also be prevented.

[0068] The slit 53 of the rope body protection member 50a is glued after fitting it into the rope body 9a, and furthermore, the outer side of the slit 53 is covered with an adhesive sheet body 54 made of vulcanized rubber and having an adhesive layer on one side. With this configuration, the slit 53 is less likely to open after attachment, so the attachment state is stable.

[0069] The other rope body 9b and rope body protection member 50b have the same configuration and installation state as the above-mentioned rope body 9a and rope body protection member 50b.

[0070] By configuring in this manner, the durability of the flow-down object capture body 1 is improved without increasing the diameter of the rope bodies 9a and 9b which are the constituent members of the flow-down object capture body 1, so that the flow-down object capture body 1 can be protected without increasing the weight and cost of the flow-down object capture body 1 and without reducing its ease of installation.

[0071] FIG. 9 is an enlarged front view of a flow-down object capture body 1 equipped with a net body protective member according to a second embodiment of the present invention, and corresponds to FIG. 4 of the first embodiment, and FIG. 10 is an enlarged end view of the XX line shown in FIG. 9.

[0072] Referring to these figures, firstly, the components of net body 7 are the same as those of net body 7 according to the first embodiment, and therefore the description thereof will not be repeated here.

[0073] Next, the net body protective member 60 includes an upper protective portion 61 covering the upper side of the support member 8, an upstream protective portion 62 that hangs down continuously from the upstream end of the upper protective portion 61, and a downstream protective portion 63 that hangs down continuously from the downstream end of the upper protective portion 61 and faces the upstream protective portion 62, and is formed into a substantially U-shaped cross section in the depth direction. The net body protective member 60 has a longitudinal length of 1000 mm, a depth length of 200 mm, and a lateral length of 115 mm. The upper protective portion 61, the upstream protective portion 62, and the downstream protective portion 63 are each made of a rubber material having a thickness of 25 mm and are formed integrally. A pair of bolt insertion holes 64a and 64b are formed at a predetermined interval in each of the upstream protective part 62 and the downstream protective part 63, and reinforcing steel plates 65a and 65b are embedded inside the upstream protective part 62 and the downstream protective part 63 around the bolt insertion holes 64a and 64b. A pair of plates 66a and 66b made of steel are attached to the inner surfaces of each of the upstream protective part 62 and the downstream protective part 63 so that their lower ends are exposed below the lower ends of the upstream protective part 62 and the downstream protective part 63. The pair of plates 66a is attached via bolts 67a inserted from the outer side of the upstream protective part 62 through the bolt insertion hole 64a, and the pair of plates 66b is attached via bolts 67b inserted from the outer side of the downstream protective part 63 through the bolt insertion hole 64b. A pair of connecting bolt insertion holes 68b and 69b are formed in the exposed lower portions of the pair of plates 66a and 66b. The effect of this configuration will be described later.

[0074] When attaching the net body protection member 60, first, the net body protection member 60 covers the support member 8 from above, and surrounds the upstream side, the upper end side (support member 8), and the downstream side of the upper part of the net body 7 with the net body protection member 60. Next, in this state, i.e., in a state where the net body 7 is sandwiched between the net body protection member 60, a connecting bolt 70b is inserted from the connecting bolt insertion hole 68a of the plate 66a attached to the upstream side protection part 62, and the upstream side protection part 62 and the downstream side protection part 63 are joined from the upstream direction to the downstream direction with the connecting bolt 70b through the pair of plates 66a and 66b. Note that similar joining is performed with the connecting bolts 70a and 70c at the other connecting bolt insertion holes 68a, 68c, and 69a, 69c, and the net body protection member 60 is fixed in a state where a part of the upper part of the net body 7 is covered.

[0075] With this configuration, even if the flow-down material flows over the net body 7 in the area where the net body protective member 60 is attached, the flow-down material hits the net body protective member 60 and does not directly hit the upper part of the net body 7, so that a high wear prevention effect can be obtained even in a narrow installation area. In addition, the prevention effect of corrosion due to wear can also be obtained. Furthermore, since not only the support member 8 of the net body 7 but also a part of the net body 7 can be surrounded, the protection area of ​​the net body 7 is expanded, and a higher wear prevention effect and corrosion prevention effect can be obtained. Furthermore, since the net body protective member 60 can be attached and removed without processing the net body 7, the net body protective member 60 can be easily attached and replaced. Furthermore, the durability of the flow-down material capture body 1 is improved without increasing the diameter of the support member 8 of the net body 7, which is a component of the flow-down material capture body 1, so that the flow-down material capture body 1 can be protected without increasing the weight and cost of the flow-down material capture body 1 and reducing the workability.

[0076] In the above embodiments, the pole protective member, the net protective member, and the rope protective member are all mainly made of rubber, but this is not limiting. Any flexible elastic body may be used, and the rubber may be reinforced with fibers or a flexible or bendable material, or a synthetic resin such as polyurethane or a thermoplastic elastomer such as polyethylene may be used.

[0077] Furthermore, in each of the above embodiments, the protective members are protective members for the posts, protective members for the net body, and protective members for the rope body, and are intended to protect the posts, net body, and rope body of the flow-down object capture body, but it is sufficient if they are capable of covering at least a part of the flow-down object capture body.

[0078] Furthermore, in each of the above-mentioned embodiments, the flow-down object capture body includes a support and a rope body, but is not limited to this, and at least one of the support and the rope body may be omitted. For example, the flow-down object capture body may include a support member that is provided so as to span between a pair of spaced apart structures, a net body that is stretched on the support member, and a protective member that covers at least a part of the support member and the net body.

[0079] Furthermore, in each of the above embodiments, the net body is a ring-type net consisting of a plurality of connected ring-shaped members covered with a diamond-shaped wire mesh, but this is not limited to this. For example, the diamond-shaped wire mesh may be omitted from the net body. Also, any wire mesh other than the ring-type net may be used as the net body.

[0080] Furthermore, in the above-mentioned embodiments, hot-dip galvanizing and the like are given as examples of rust prevention treatments for the H-beam and wire rope, but the present invention is not limited to this and other rust prevention means may be adopted. For example, known rust prevention means such as rust prevention paint or electroplating may be adopted.

[0081] Furthermore, in each of the above-described embodiments, the weight of each of the pole protective member, the net protective member and the rope protective member is set to 25 kg or less, but it may be 25 kg or more.

[0082] Furthermore, in each of the above embodiments, the protective member for the net body is attached to the support member between a pair of posts with no gap between them, but it may also be attached spaced apart at a predetermined interval.

[0083] Furthermore, in the above-mentioned embodiments, the thickness of the rubber material used in each of the post protective member, net protective member, and rope protective member is a specific dimension, but it may be set to 5 to 15 mm or more. In cases where rubber material is installed in erosion control dams, the amount of wear is about 0.1 to 0.3 mm per year, and if the thickness is within the above range, it can withstand wear for 50 years.

[0084] Furthermore, in the above-described first embodiment, the pole protection member is capable of surrounding the anchor head, but it does not have to be configured in this way.

[0085] Furthermore, in the above first embodiment, the pillar protection member had a notch formed therein and could be bent toward the upstream side, but it may also be configured in other ways to be bendable, or the lower part may be formed to protrude diagonally downward.

[0086] Furthermore, in the first embodiment, the pole protection member is capable of surrounding the lower part of the pole on the upstream side, but it is sufficient if it can cover at least a part of the pole on the upstream side, and the mounting range may be expanded to the upper part of the pole on the upstream side. Furthermore, it may also be mounted on the downstream side of the pole.

[0087] Furthermore, in the first embodiment, the pole protection member has a substantially U-shaped cross section in the short side direction, but it may have another shape.

[0088] Furthermore, in the above first embodiment, the pole protection member further includes a pair of protrusions that can be engaged with the flange portion of the pole, but this need not be the case, and the pole protection member may be made of other rigid materials such as resin, or may have other shapes.

[0089] Furthermore, in the above first embodiment, two pole protection members of specific dimensions were attached in succession, but it is also possible to attach only one long pole protection member by extending the longitudinal length of the pole protection member, or to attach multiple short pole protection members by further shortening the longitudinal length.

[0090] Furthermore, in the above first and second embodiments, the protective member for the net body was joined from a specified direction by a connecting bolt, but it may be joined from another direction or may be joined by a connecting fitting instead of a connecting bolt.

[0091] Furthermore, in the above first and second embodiments, the protective member for the net body has a specific shape, but it may have other shapes as long as it is a shape that can surround the upstream side, upper end side and downstream side of the upper part of the net body.

[0092] Furthermore, in the above first and second embodiments, the protective member for the net body surrounds the upstream and downstream sides of the net body and the support member, but it is sufficient if it is capable of covering at least a portion of the upper part of the net body.

[0093] Furthermore, in the above first and second embodiments, three protective members for the net body of a specific dimension are attached with a gap between them, but they may be attached continuously without a gap, and as long as they cover the space between adjacent posts, only one long protective member for the net body whose longitudinal length is extended may be attached, or multiple short protective members for the net body whose longitudinal length is further shortened may be attached.

[0094] Furthermore, in the second embodiment, the pair of plates are made of steel plates, but they may be made of other materials having rigidity, such as resin.

[0095] Furthermore, in the above-mentioned first embodiment, the cuts in the rope body protection member that have been glued after installation are covered with an adhesive sheet body, but the adhesive sheet body may be omitted, and the cuts may be glued by other adhesive means. Furthermore, the cuts do not have to be glued.

[0096] Furthermore, in the above-described first embodiment, the protective member for the rope body has a slit formed therein, but it is sufficient if an opening portion, such as a notch, is formed so that the protective member for the rope body can be opened.

[0097] Furthermore, in the above first embodiment, the inner diameter of the rope body protection member is set to a specific dimension, but the inner diameter dimension may be changed depending on the number of rope bodies to which the protection member is to be attached.

[0098] Furthermore, in the above-mentioned first embodiment, the rope body protection member has a specific shape, but it is sufficient if it can cover at least a part of the upstream side of the rope body. It may have another shape.

[0099] Furthermore, in the above first embodiment, the rope body protective member covers an area including the wire clip, but it may cover an area including only the rope body or one end of the rope.

[0100] Furthermore, in the above first embodiment, one rope body protective member of a specific dimension was attached, but a long rope body protective member having an extended longitudinal length may be attached, or multiple short rope body protective members having an even shorter longitudinal length may be attached.

[0101] Furthermore, in the above first embodiment, the rope body protection member is not fixed to the rope body, but it may be provided with a fixing means for fixing to the rope body. [Explanation of symbols]

[0102] 1... Fallen object trap 2a, 2b, 2c...posts 5a, 5b...Anchor 6...Flange section 7…Net body 8...Support member 9a, 9b...Rope body 20a, 20b, 20c...Protection members for support columns 21...Front wall part 22a, 22b...side wall part 26a, 26b...a pair of protrusions 30a, 30b, 30c...Protection members for support columns 31...Front wall part 32a, 32b...side wall part 37a, 37b…Notch 40a, 40b, 40c, 40d, 40e, 40f...Net body protective member 47a, 47b, 47c...Connecting bolts 50a, 50b...Rope body protection member 53...Gap 54...Adhesive sheet body 60...Protective material for net body 70a, 70b, 70c...Connecting bolts In addition, the same symbols in each drawing indicate the same or corresponding parts.

Claims

1. A protective member attached to a flow capture body including a net body for capturing debris flow and falling rocks, The elastic body has flexibility. It can cover at least a part of the flow-down object capture body, The drift object capture body includes a support pillar that is fixed to the ground and installed so as to extend in a substantially vertical direction in order to support the net body, The support pillar may cover at least a portion of the upstream side thereof, a front wall portion provided on an upstream portion of the support pillar; and a pair of side wall portions extending continuously from both ends of the front wall portion and facing each other, A protective member capable of surrounding at least a portion of the upstream side of the support pillar on the inner side of each of the front wall portion and the pair of side wall portions.

2. The protective member according to claim 1 , wherein each of the front wall portion and the pair of side wall portions can further surround an anchor head for fixing a base of the support column on an inner side thereof.

3. 3. The protective member according to claim 1, further comprising a pair of projections protruding inwardly from an inner surface of each of the pair of side walls and configured to be engageable with a flange portion of the support column made of H-shaped steel.

4. A protective member attached to a flow capture body including a net body for capturing debris flow and falling rocks, The elastic body has flexibility. It can cover at least a part of the flow-down object capture body, At least a part of the upper part of the net body of the drift object capture body can be covered, A protective member capable of surrounding the upstream side, the upper end side and the downstream side of the upper portion of the net body.

5. 5. The protective member according to claim 4, wherein opposing ends below the upper portion of said net body are joined by bolts from the upstream direction to the downstream direction with said net body sandwiched therebetween.

6. A protective member attached to a flow capture body including a net body for capturing debris flow and falling rocks, The elastic body has flexibility. It can cover at least a part of the flow-down object capture body, It can cover at least a part of the upstream side of the rope body of the flow-down object capture body, The device has a hollow cylindrical shape and an open portion is formed from one end to the other end. The protective member further comprises an adhesive means for closing the opening after fitting onto the rope body.

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