WO2018051382A1

WO2018051382A1 - Permeation-type capturing structure

Info

Publication number: WO2018051382A1
Application number: PCT/JP2016/004166
Authority: WO
Inventors: 利充野村; 昭一井上; 智弘藤井; 陽一西田; 満明山本
Original assignee: 株式会社プロテックエンジニアリング
Priority date: 2016-09-13
Filing date: 2016-09-13
Publication date: 2018-03-22
Also published as: JP6548195B2; JPWO2018051382A1

Abstract

[Problem] To improve assembly workability and enable a significant reduction in construction costs and construction time, and to improve damping performance. [Solution] Rear surface loop materials 60 are used, the rear surface loop materials 60 having a double rope structure and being formed into a loop shape by non-slidably fixing both end sections of a rope material having a length equal to or greater than double the span between rigid structures 30. Continuous bodies, in which a rear surface loop material 60 provided horizontally on the downhill side of the rigid structures 30 is anchored to an end ring 21 of terminal mounting ropes 26 and in which a capturing net 20 disposed on the uphill side and the rear surface loop material 60 disposed on the uphill side are made continuous with each other, are extended between the peripheral surfaces of a plurality of rigid structures 30, 30.

Description

Transmission type capture structure

The present invention relates to a transmission type capture structure that can be used for debris flow, debris trapping such as driftwood, driftwood trapping in rivers, slope fall prevention, avalanche prevention, and the like.

A transmission type trapping structure using a trapping net formed in a lattice shape by crossing steel ropes such as wire ropes in the vertical and horizontal directions is known (Patent Document 1).
As a means of attaching the capture net, it is known to use anchors to fix the periphery of the capture net to the shore or to the valley (Patent Document 2), and to attach both sides of the capture net to the pillars standing on the valley. (Patent Document 3).

JP 50-31604 A Japanese Patent Laid-Open No. 2000-257049 (FIG. 1) JP 2002-339338 A (FIG. 1)

The conventional transmission type capture structure has the following problems.
<1> In the transmission-type capture structure described in Patent Document 2 in which the anchor is used to fix the periphery of the capture net to a shoreline or a valley, an anchor having a high yield strength is required. A heavy burden is imposed on both sides of the construction period.
<2> Further, when both ends of each horizontal rope constituting the catch net are stretched on the shore, a great deal of labor and time are required for the tension work of each horizontal rope, and the work efficiency is low.
<3> Even in the transmission type trapping structure described in Patent Document 3 that is attached to the pillars standing on both sides of the trapping net, both ends of the horizontal ropes constituting the trapping net are attached to the pillars. In the case of laying, it takes much labor and time for the tension work of each horizontal rope, and the work efficiency of the work of attaching the catching net is low.
<4> The conventional capture net used in the transmission-type capture structure is such that the intersection of the capture net moves and the mesh easily expands / contracts at the time of impact, and the transmission of the impact load accompanying the displacement of the capture net There are problems such as a large loss and a tendency that stress is concentrated on the horizontal rope located in the receiving range with a narrow impact force diffusion range and breaks easily.

The present invention has been made in view of the above points, and an object of the present invention is to provide the following transmission type capture structure.
<1> The assembly workability should be improved and the construction cost and construction period can be greatly reduced.
<2> Improving shock absorbing performance and maximizing the strength of the capture net to improve buffer performance.

The present invention is a transmission type comprising a plurality of rigid structures that are installed on the valley floor at intervals, and a net-like trapping net that is installed between the rigid structures on the mountain valley side of the rigid structure. A capture structure, wherein the capture net includes a net body having a plurality of meshes, and a plurality of terminal attachment ropes extending from the left and right sides of the net body, and the terminal attachment ropes end at the ends. Using a back loop material of a double rope structure that has a ring and is formed in a loop shape by fixing both ends of the rope material having a length more than twice the span of the rigid structure so as not to slide, The back loop material laid horizontally on the canyon side of the rigid structure was moored to the end ring of the terminal attachment rope to provide continuity between the capture net and the back loop material, and acted on the capture net Distribute the impact force to the back loop material via the terminal attachment rope As can be reach, characterized in that the continuous body of the terminal mounting rope and the back loop material is stretched between the peripheral surfaces of the plurality of rigid structure.
In another embodiment of the present invention, a plurality of stoppers project from the circumferential surface of the rigid structure along the longitudinal direction of the rigid structure, and the end ring of the terminal attachment rope that is sheathed by the stopper The movable range is regulated to a certain range by the stopper.
In another embodiment of the present invention, the net body is arranged at the intersection of the single rope with a plurality of single ropes having end rings at both ends, and can be connected to the end rings of the single rope with a pin type connection. A plurality of relay couplers are combined to form a net shape.
In another embodiment of the present invention, a plurality of laterally arranged single ropes constitute a continuous transverse line via a relay connector, and a loop structure is formed by the lateral rope, the terminal attachment rope, and the capture net.
In another embodiment of the present invention, the terminal attachment rope is constituted by the single line connected to the left and right sides of the net body via a relay connector.
In another embodiment of the present invention, the plurality of single ropes and a plurality of relay couplings are combined so that the mesh of the net body exhibits a geometric shape excluding a circle.
In another embodiment of the present invention, the net body is composed of a plurality of single ropes arranged so as to intersect in the column direction and the row direction, and a plurality of relay connectors interposed at the intersections of the single ropes, and the mesh is rectangular. Presents.
In another embodiment of the present invention, the net body includes a plurality of single ropes arranged obliquely and a plurality of relay connectors interposed at intersections of the single ropes, and the mesh has a rhombus shape.
In another embodiment of the present invention, the net body is arranged in one direction of the column direction or the row direction, and a plurality of single lines arranged obliquely intersecting each other, and a plurality of single lines interposed at the intersection of each single line The mesh has a triangular shape.
In another embodiment of the present invention, the relay connector includes a plurality of detachable mooring pins, and is pivotally connected to the end ring of the single rope via the mooring pins.
In another embodiment of the present invention, the relay connector includes a pair of single plates disposed opposite to each other, and a plurality of mooring pins that can be inserted and removed between the single plates.

The present invention can achieve any one of the following effects.
<1> Since the end ring of each end attachment rope functions as a moving pulley, a trapping net can be placed between a plurality of rigid structures by simply repeating the operation of pulling the rope material for the back loop material with a small force. Can be stretched.
Therefore, the assembly workability of the transmission type capture structure can be improved and the construction cost and the construction period can be greatly reduced.
<2> In the transmission type trapping structure of the present invention, the trapping net and the back loop material have continuity, so that the impact force can be buffered by elastic deformation by the trapping net and elongation of the rope material by the back loop material. As this is possible and the expansion of the impact load to the entire capture net is increased by preventing the expansion deformation of the net of the net body, the dispersion performance of the impact force by the transmissive capture structure is increased, and the buffer performance is improved. improves.
<3> Although the impact load acting on the capture net is transmitted to the back loop material, the load material of the rope material forming the back loop material is halved because the rope material forming the back loop material is doubled. it can.
Therefore, a rope material having a strength smaller than that of the single rope constituting the capturing net can be used as the rope material constituting the back surface loop material.
<4> Since the structure is such that the impact load acting on the trapping net is dispersed and supported by both the trapping net and the back loop material, the strength (proof strength) of the trapping net can be reduced compared to the conventional trapping net. it can.
<5> Since the capture net can be manufactured by a simple operation of simply connecting a plurality of single ropes via the relay connector, the capture net can be manufactured at low cost.
Moreover, since the single rope having a common structure can be used as both the net body and the terminal attachment rope, the number of components of the capture net is reduced.
<6> The net body can be manufactured according to the installation site simply by using multiple single ropes and multiple relay connectors, and the mesh size and mesh shape can be arbitrarily selected simply by changing the arrangement direction and overall length of the single rope. it can.
<7> Since the end ring of the single rope and the relay connector are connected by a detachable mooring pin, it is possible to easily replace a damaged single rope or relay connector, so that the capture net can be repaired. Get better.
<8> Since the intersection of the ropes can be formed in a net shape without knotting, a large-diameter and high-strength steel rope material can be used for the single rope.
Therefore, it is possible to provide a high-strength capturing net that can resist a huge impact such as debris flow.

The perspective view of the transmission type | mold capture structure which concerns on Example 1. FIG. Top view of transmissive capture structure Exploded assembly drawing of capture net Single rope perspective view Disassembled assembly drawing of relay connector Partial enlarged sectional view of the connecting part of the single rope and the relay connector Partial front view of net body to explain the transmission path of impact force Perspective view of mooring part of terminal mounting rope and back loop material Partial sectional view of a rigid structure to explain the range of motion of a single wheel Partial sectional view of a rigid structure to explain the range of motion of a single wheel Partial front view of capture net according to Embodiment 2 The partial front view of the other capture net concerning Example 2

[Example 1]
<1> Outline of Transmission-type Capture Structure A transmission-type capture structure 10 according to the present embodiment will be described with reference to FIGS.
The transmission-type capture structure 10 is provided with a capture net 20 having a plurality of terminal attachment ropes 26 on both sides of the net body 25, and a canopy that is spaced apart from the valley, so that the capture net 20 covers a cross-sectional area of a river or the like. The net body 25 is attached to the

rigid structures

30, 30 by tensioning between the plurality of

rigid structures

30, 30 to be attached to the pair of

terminal attachment ropes

26, 26 extending from the left and right sides of the capture net 20. And a back loop member 60 attached therebetween.
The capture net 20 is disposed on the valley side of the

rigid structures

30, 30, and the back loop member 60 is disposed on the valley side of the

rigid structures

30, 30.

<2> Trapping Net The trapping net 20 is a lattice net used for a transmissive trapping structure.
The capture net 20 is constituted by a belt-like net body 25 and a plurality of terminal attachment ropes 26 extending horizontally from the left and right sides of the net body 25.
The net body 25 and the terminal attachment rope 26 include a plurality of single ropes 22 having

end rings

21 and 21 at both ends, and a plurality of relay connectors 50 that can be connected to the ends of the plurality of single ropes 22. It is configured in combination.

<2.1> Net Body The net body 25 of this example will be described with reference to FIGS. 3 to 6. The net body 25 has a plurality of single ropes 22 arranged in the vertical and horizontal directions, and the intersection of the single ropes 22. It is the net-like thing assembled with the intermediate | middle connection tool 50 interposed.
The plurality of single ropes 22 arranged in the lateral direction are located on the same line via the relay connector 50 and constitute a continuous horizontal rope 23.
The plurality of single cords 22 arranged in the vertical direction are located on the same line via the relay connector 50 and constitute a continuous longitudinal cord 24.
The plurality of lateral cords 23 and the plurality of longitudinal cords 24 are crossed and assembled in a lattice shape.
The catching net 20 is formed with a square mesh A surrounded by four single ropes 22 and four relay connectors 50 arranged in the vertical and horizontal directions.
The mesh size of the mesh A (the length of the vertical side and the length of the horizontal side) is obtained from the total length of each single rope 22.
At the time of impact, the planar shape of the mesh A changes in size, but the overall length of each single cord 22 that defines the mesh A does not change, so the mesh size of the mesh A does not change.

<2.1.1> Single rope The single rope 22 is a combined rope material constituting the net body 25 and the terminal attachment rope 26.
As shown in FIG. 4, the single rope 22 is made of a steel or fiber rope in which one or more are twisted, and has endless rings 21 at both ends thereof.
As the trapping net 20 for the transmission trapping structure, a high strength steel rope material is used for the single rope 22, and both ends of the steel rope material are folded and iced or compressed to form an end ring 21. To do.
The mesh A dimension and the net installation length are determined by the total length of the single rope 22.

<2.1.2> Relay connector The relay connector 50 is a connector for detachably connecting the plurality of single cords 22.
The relay connector 50 illustrated in FIGS. 5 and 6 will be described. The relay connector 50 includes a pair of

single plates

51, 51 arranged opposite to each other, and a plurality of mooring pins inserted between the

single plates

51, 51. 52.
A plurality of pin holes 53 into which the mooring pins 52 can be inserted are formed at the periphery of each single plate 31.
Although the present embodiment shows a form in which four pin holes 53 are formed at equal intervals, the number of pin holes 53 formed can be selected as appropriate.
As the anchoring pin 52, a connecting pin can be used in addition to the illustrated bolt and nut.
The mooring pin 52 is inserted into the end ring 21 together with the pair of

single plates

51 and 51 so that the single cable 22 and the relay connector 50 can be connected in a pin structure, and the single cable 22 is connected to the relay connector 50. The mooring pin 52 can be turned around.

<2.2> Assembly Example of Capture Net As shown in FIG. 3, a plurality of single ropes 22 are arranged in the vertical and horizontal directions, and a relay net 50 is provided at the intersection of each single rope 22 to form a belt-like net body 25. Assemble.
The capture net 20 can be assembled by simply connecting one end of the plurality of single ropes 22 to the left and right sides of the net body 25 via the relay connector 50 and assembling the terminal attachment ropes 26 in multiple stages.
In addition to being able to be assembled at the factory, the capture net 20 can also be assembled on site.
Alternatively, the net body 25 may be manufactured in advance as a plurality of divided bodies, and the catching net 20 may be completed by adding the single rope 22 between the plurality of divided bodies that are subdivided into the site.
The completed capture net 20 is attached to the rigid structure 30 via the end rings 21 of the terminal attachment ropes 26 extending horizontally from the left and right sides to complete the transmission-type capture structure.
Since the trapping net 20 does not use a single continuous rope, it can be assembled into any shape according to the shape of the site by combining a plurality of single ropes 22 and the relay connector 50.

Since the relay connector 50 is interposed at the intersection of the single cords 22, the intersection of the single cords 22 does not move.
And since the intersection of each single rope 22 does not shift | deviate, not only the load between the several single ropes 22 connected with the relay connection tool 50 is possible, but the transmission loss of a load can also be reduced significantly.

<3> Terminal Attachment Rope The terminal attachment rope 26 is a rope member made of single rope 22 provided on the left and right sides of the net body 25 and functions to attach the net body 25 to the rigid structure 30.
The plurality of terminal attachment ropes 26 are located on an extension line of the transverse cord 23 constituting the net body 25 via the relay connector 50.
The connection structure between the terminal attachment rope 26 and the net body 25 is the same as the connection structure using the relay connector 50 shown in FIG.

<4> Back Loop Material As shown in FIG. 2, the back loop material 60 is a rope material for horizontally laying the net body 25 between the

rigid structures

30 and 30 via the terminal attachment rope 26, and has a rigid structure. It has a length more than twice the span of the

body

30,30.
The back loop member 60 is passed through one rope member across the end rings 21 of the end attachment ropes 26 on both the left and right sides, and the overlapping portion near the end portion of the rope member cannot be slid by the fixture 61. And is formed in a loop shape.

<4.1> Relationship between Capture Net and Back Loop Material The transverse cable 23 constituting the capture net 20 is located on the same line via a plurality of single cables 22 and a relay connector 50 arranged in the lateral direction. Terminal attachment ropes 26 extend at both ends.
Since the back surface loop member 60 is stretched between the

terminal attachment ropes

26, 26, the entire loop loop structure having a continuity through the lateral cable 23, the terminal attachment rope 26, and the capture net 20 is exhibited.

<4.2> Reason for combining the terminal attachment rope and the back loop material The back loop material 60 was tethered to the end rings 21 and 21 of the

terminal attachment ropes

26 and 26 extending from the left and right sides of the capture net 20 and bridged. This is because the end ring 21 on the free end side of each end attachment rope 26 functions as a moving pulley, and the back loop member 60 is pulled in the contracting direction with a small force, so that the adjacent rigid structures 30 are separated from each other. This is because the capture net 20 is stretched and the impact load is distributed and supported in cooperation with the capture net 20 at the time of receiving.

<5> Rigid Structure The rigid structure 30 is a highly rigid structure that supports the capture net 20, and may have two or more.
In this example, the case where the rigid structure 30 is a column having a circular cross section will be described.

<5.1> Material Example of Rigid Structure The rigid structure 30 is a highly rigid column such as a steel pipe, a concrete-filled steel pipe, a concrete column, and the like, and is erected on the valley floor with a predetermined interval.

<5.2> Stopper A plurality of stoppers 31 project from the outer periphery of the rigid structure 30 in accordance with the mounting height of the terminal mounting rope 26. As shown in FIG. The end ring 21 on the end side is used on the stopper 31.
The reason why the end ring 21 is mounted on the stopper 31 is to restrict the movable range of the end ring 21 (the amount of movement of the terminal attachment rope 26) within a certain range.
FIG. 9 shows a state in which the proximal end side of the end ring 21 of the terminal attachment rope 26 is positioned in contact with the stopper 31, and FIG. 10 shows that the distal end side of the end ring 21 of the terminal attachment rope 26 contacts the stopper 31. Shows the state.

In this example, the stopper 31 is formed on the outermost surface of the rigid structure 30 with respect to the position where the stopper 31 is formed. However, the stopper 31 is rigid from the front side of the rigid structure 30 (the installation side of the capture net 20). What is necessary is just to protrude in the surrounding surface of the area which reaches the back side (installation side of the back surface loop material 60) of the structure 30. FIG.

[Construction method of transmission type capture structure]
Next, a construction method of the transmission type capturing structure 10 will be described.

<1> Standing Up of Rigid Structure As shown in FIGS. 1 and 2, the

rigid structures

30 and 30 are set up on a valley or the like at a predetermined interval.
The capture net 20 is carried into the valley mountain side of the

rigid structures

30, 30, and a plurality of rope materials for the back loop material 60 are carried into the valley valley side of the

rigid structures

30, 30.

<2> Attachment of capture net It is also possible to stretch the capture net 20 between the adjacent

rigid structures

30 and 30 by hooking the end ring 21 to the stopper 31 while pulling each end attachment rope 26 alone. However, since the weight of the capture net 20 is added, a large tension force is required to tension each terminal attachment rope 26 individually.

Therefore, as shown in FIG. 2, each end attachment rope 26 extended from both sides of the net body 25 while winding a part of the rope material for the back loop member 60 around the circumference of the rigid structure 30 by a half circumference. Is inserted through the end ring 21 at the free end of the back and folded back.
At this time, the end rings 21 of the terminal attachment ropes 26 are covered with the corresponding stoppers 31.
In this state, a pair of left and right terminal attachment ropes 26 are attached to the circumferential surface of the rigid structure 30 as the both ends of the rope material for the back loop member 60 folded back to the back side of the rigid structure 30 are tightened in the contraction direction. It is pulled to the back loop material 60 side while being wound.
Since the end ring 21 on the free end side of each end attachment rope 26 functions as a moving pulley, the catching net 20 is interposed between the adjacent

rigid structures

30 and 30 by pulling the back loop member 60 in a contracting direction with a small force. Can be stretched without slack.
The back loop material 60 is formed by fixing the overlapping portion near the end of the rope material for the back loop material 60 with the fixture 61 so as not to slide.
A plurality of back surface loop members 60 are stretched on the back side of the adjacent

rigid structures

30, 30 in the above-described operation process, thereby completing the transmission type capturing structure 10 having a predetermined height.

As described above, by pulling the rope material for the back loop material inserted through the end ring 21 in the shrinking direction, the trapping net 20 is easily interposed between the adjacent

rigid structures

30 and 30 in a short time. Can be stretched without slack.
Since the end wheel 21 of each terminal attachment rope 26 functions as a moving pulley, the force for pulling the rope material for the back loop material may be small, and traction equipment such as a large chain block is unnecessary.
Therefore, the assembly workability of the transmission type capturing structure 10 can be improved and the construction cost and the construction period can be greatly reduced.

[Sandproof function of capture net]
Next, the sabo function of the transmission type capturing structure 10 will be described.

<1> During Medium and Small Floods FIG. 7 shows a capture net 20 disposed so as to cover a cross-sectional area of a river or the like, and the capture net 20 is stretched in a standing state with respect to the valley.
In the case of medium and small-scale floods, gravel or mud water that does not cause a disaster flows down through the mesh A at the bottom of the catching net 20.

<2> When a debris flow occurs When a debris flow or the like occurs, the catching net 20 captures a fallen material such as driftwood or debris larger than the mesh A, and causes a fallen sediment such as debris smaller than the mesh A that may pass through. Can do.
In the conventional catching net, the crossing point of the steel rope is displaced and the mesh is expanded and deformed. However, the crossing point of each single rope 22 constituting the net body 25 is fixed so as not to slide, so that the mesh A is expanded and deformed. Therefore, it is possible to guarantee the function of catching the falling material without inadvertently discharging the excessive flowing material.
In addition, in the conventional catching net, the crossing point of the steel rope is shifted, so that the diffusion range of the impact force is narrow, and the stress is concentrated on the lateral rope located in the receiving range, and it is easy to break.
On the other hand, in the capture net 20 of this example, the intersection of the single ropes 22 constituting the net body 25 does not shift and the free rotation of the single rope 22 at the intersection of the single ropes 22 via the relay connector 50. It has a structure that can move.
Therefore, since the impact load can be distributed and transmitted to all the single cords 22 connected to the relay connector 50, the transmission loss can be extremely reduced, and the impact force acting on a part of the capture net 20 can be reduced. The strength inherent to the capture net 20 can be maximized.
For example, when an impact force acts on the center portion of the net body 25 shown in FIG. 5, the impact force is transmitted in a chain manner to each single cord 22 positioned around the center portion of the net body 25 as indicated by an arrow. To go.

<3> Impact Force Transmission Path In this example, the impact force acting on the catching net 20 is supported by the catching net 20, the back loop member 60, and the rigid structure 30 described in detail below.

<3.1> Buffering action of impact force by capture net and back loop material Capture net 20 and back loop material 60 are slidably wound between a pair of

rigid structures

30 and 30 in a continuous state. It is.
When a debris flow or the like collides with the trap net 20 on the valley mountain side, the impact force is transmitted to the rear loop member 60 on the valley valley side via the

terminal attachment ropes

26 and 30.
The tensile force of the back surface loop member 60 increases as the capture net 20 is bent and deformed toward the valley mountain side.

The trapping net 20 and the back surface loop member 60 are not provided with a shock absorber. However, since the trapping net 20 and the back surface loop member 60 have continuity, the elastic deformation by the trapping net 20 and the rope member by the back surface loop member 60 The impact force can be buffered by the elongation.

When a frictional sliding type shock absorber is interposed in a part of the transmission type capturing structure, an impact force such as a debris flow repeatedly acts, so that a continuous shock absorbing action cannot be expected for the shock absorber.
On the other hand, in the transmissive | pervious capture structure 10 of this invention, it is possible to buffer an impact force by the elastic deformation by the capture | acquisition net | network 20, and the expansion-contraction of the back surface loop material 60. FIG.
The impact force acting on the trapping net 20 in this way is dispersed and supported by the trapping net 20 and the back loop member 60 having a double rope structure, and is finally supported by the bending strength of the rigid structure 30.

Since the back surface loop member 60 has a double rope structure, the impact load caused by the back surface loop member 60 is reduced.
Therefore, the back loop member 60 can be handled by a low-strength small-diameter rope member, and the fixture 61 can be handled by a small one.

<3.2> Transmission of Impact Force by Stopper When a huge impact force is applied to the catching net 20, the end attachment rope 26 wound around the rigid structure 30 is slightly slid by the elongation of the back loop member 60.
As the terminal attachment rope 26 slides, when the tip of the end ring 21 of the terminal attachment rope 26 abuts against the stopper 31 as shown in FIG. 10, the sliding of the terminal attachment rope 26 is restricted.
Therefore, the impact force acting on the capture net 20 is transmitted to the rigid structure 30 through the stopper 31 as a bending force and a rotational force.
The impact force that finally acts on the capture net 20 is supported by the bending strength and rotational strength of the rigid structure 30.
By adding the rigid structure 30 to the support member having the impact force, the load burden on the back surface loop member 60 is reduced.
Thus, in this example, after the impact force acting on the capture net 20 is first supported by the back surface loop member 60, it can be finally supported by the rigid structure 30.
Even if the back loop member 60 breaks, the trapping net 20 and the rigid structure 30 can continue to support the impact force, so that the safety of the transmissive trapping structure 10 is significantly increased as compared with the conventional case.

<4> Buffering Performance of Transmission Type Capture Structure As described above, in the transmission type capture structure 10 of the present invention, the capture net 20 and the back loop material 60 have continuity, so that the elastic deformation by the capture net 20 And the impact force can be buffered by the elongation of the rope material by the back loop member 60, and the expansion deformation of the mesh A of the net body 25 is prevented, and the performance of transmitting the impact load to the entire capture net 20 is enhanced. Along with this, the dispersion performance of the impact force by the transmission type capturing structure 10 is enhanced, and the buffer performance is improved.

<5> Removal of trapped spilled material The trapping net 20 on the gorge mountain side of the transmissive trapping structure 10 captures spilled items such as debris flow and driftwood. The trapped falling material is removed by a known means.
When the falling material is removed and the external force is lost, the capture net 20 and the back surface loop member 60 are restored to the original shape before receiving by the self-restoring force, so that it is not necessary to retighten the back surface loop member 60.

<6> Repair of Capture Net The single rope 22 constituting the capture net 20 is assembled to the relay connector 50 so as to be detachable.
Therefore, when some single ropes 22 are damaged, it is possible to simply remove the damaged single rope 22 from the relay connector 50 and replace it with a new single rope 22 without replacing the entire capture net 20. Similarly, when the relay connector 50 is damaged, the relay connector 50 can be easily replaced and repaired.

[Example 2]
Other capture nets 20 will be described with reference to FIGS.
In the previous embodiment, a configuration was described in which a plurality of single ropes 22 are arranged so as to intersect in the vertical and horizontal directions, and the net main body 25 is configured by interposing a relay connector 50 at the intersection. May be assembled by crossing them diagonally.
FIG. 11 shows a form in which a rhombus mesh A is formed by crossing a plurality of single ropes 22 in an oblique direction except for the upper and lower sides and the left and right sides of the net body 25.
FIG. 12 shows a form in which a triangular mesh A is formed by crossing a plurality of single ropes 22 arranged in the horizontal direction and single ropes 22 arranged in a cross diagonal direction.
The net body 25 shown in FIG. 12 may be rotated 90 degrees.
Further, the capturing net 20 may be assembled by hierarchically combining the forms of the plurality of net bodies 25 shown in FIGS.
Although illustration is omitted, in any form, a plurality of terminal attachment ropes 26 are attached to the left and right sides of the net body 25, and the capturing net 20 and the back loop member 60 are continuous through the terminal attachment ropes 26. It is the same structure as Example 1 mentioned above that it is connected so that it may have.

In this example, by changing the number of single ropes 22 connected to each relay connector 50, the shape of the mesh A in the net body 25 can be any geometric shape excluding a circle (triangle, square). The strength of the net body 25 can be changed.
Further, by combining a plurality of single ropes 22 and a plurality of relay connectors 50, the contour shape of the net body 25 can be assembled into an arbitrary shape.

Further, the net body 25 may be a known net having a grid-like mesh in which continuous ropes are crossed and the crossing portion is fixed with clips.

[Example 3]
In the above-described embodiment, the case where the back loop member 60 has a double rope structure has been described. However, one end ring 21 between the free ends of the end attachment ropes 26 extending from both sides of the net body 25 is provided. It is also possible to wrap the rope material in multiples of three or more.
By winding the back loop material 60 in multiples of three or more, the load burden on the rope material constituting the back loop material 60 can be further reduced, and an economical and easy-to-handle small-diameter rope material can be used.

DESCRIPTION OF SYMBOLS 10 ... Transmission type capture structure 20 ... Capture net 21 ... End wheel 22 ... Single rope 23 ... Transverse cable 24 ... Vertical Cable 25 ... Net body 26 ... Terminal attachment rope 30 ... Rigid structure (support)
31 ... Stopper 50 ... Relay connector 51 ... Single plate 52 ... Mooring pin 60 ... Back loop material 61 ... Fixing tool

Claims

A transmission type capture structure comprising a plurality of rigid structures installed at intervals on the valley floor, and a net-like capture net that is placed between the rigid structures on the mountain valley side of the rigid structure. There,
The capture net is a net body having a plurality of meshes;
A plurality of terminal attachment ropes extending from the left and right sides of the net body;
The terminal attachment rope has an end ring at an end,
Using a back loop material of a double rope structure formed in a loop shape by fixing both ends of a rope material having a length more than twice the span of the rigid structure so as not to slide,
The back loop material laid horizontally on the canyon side of the rigid structure is moored to the end ring of the terminal mounting rope to provide continuity between the capture net and the back loop material,
The continuous body of the terminal mounting rope and the back loop material is arranged around the plurality of rigid structures so that the impact force acting on the capture net can be distributed and transmitted to the back loop material via the terminal mounting rope. It is spanned between faces,
Transmission type capture structure.
A plurality of stoppers project from the peripheral surface of the rigid structure along the longitudinal direction of the rigid structure, and the movable range of the end ring of the terminal mounting rope that is sheathed by the stopper is within a certain range by the stopper. The transmission type capturing structure according to claim 1, wherein
The net body includes a plurality of single ropes having end rings at both ends of the net body, and a plurality of relay connectors arranged at intersections of the single ropes and capable of being pin-connected to the end rings of the single ropes. The transmission type capturing structure according to claim 1, wherein the transmission type capturing structure is combined to form a net shape.
The plurality of laterally arranged single ropes constitute a continuous transverse line through a relay connector, and the looped line is formed by the lateral line, the terminal attachment rope, and the capture net. The transmission type capture structure as described.
The transmission type capturing structure according to claim 3, wherein the terminal attachment rope is constituted by the single rope connected to the left and right sides of the net body via a relay coupling tool.
6. The system according to claim 1, wherein the plurality of single cords and a plurality of relay couplings are combined so that the mesh of the net body has a geometric shape excluding a circle. The capture net described in the section.
The net body is composed of a plurality of single lines arranged intersecting in the column direction and the row direction, and a plurality of relay couplings interposed at the intersections of each single line, and the mesh has a rectangular shape, The acquisition net according to any one of claims 1 to 6.
The net body is composed of a plurality of single ropes arranged so as to obliquely intersect with each other, and a plurality of relay couplers interposed at intersections of the single ropes, and the mesh has a rhombus shape. The capture net according to any one of 6.
The net body is arranged in one direction of either the column direction or the row direction, and includes a plurality of single ropes arranged obliquely and a plurality of relay couplers interposed at intersections of the single ropes, The acquisition net according to claim 1, wherein the mesh has a triangular shape.
10. The relay connector according to claim 3, further comprising a plurality of detachable mooring pins that are pivotably coupled to the end ring of the single rope via the mooring pins. The capture net according to one item.
10. The relay connector according to claim 3, further comprising: a pair of single plates disposed opposite to each other, and a plurality of mooring pins that are inserted between the single plates and can be attached and detached. The capture net according to one item.