WO2018042470A1

WO2018042470A1 - Net for catching flowing-down object

Info

Publication number: WO2018042470A1
Application number: PCT/JP2016/004047
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: 2016-09-05
Filing date: 2016-09-05
Publication date: 2018-03-08
Also published as: JPWO2018042470A1; JP6566369B2

Abstract

[Problem] To provide a net for catching a flowing-down object, said net being capable of taking full advantage of the strength of a net body by enhancing the impact-force dispersion performance. [Solution] A net for catching a flowing-down object according to the present invention is provided with a net body 20 and a plurality of terminal mounting ropes 30, wherein the net body 20 and the terminal mounting ropes 30 are configured by combining a plurality of single ropes 40 each having a terminal ring 41 on each end thereof and a plurality of relay/connection tools 50.

Description

Falling goods catch net

The present invention relates to a falling matter catching net that can be used for debris flow, debris catching work such as driftwood, driftwood catching work in rivers, slope fall prevention work, avalanche prevention work and the like.

In the transmission type trapping structure, a trapping net formed in a lattice shape by crossing steel ropes such as wire ropes in the vertical and horizontal directions is used (Patent Document 1).
It is also known that an anchor is used to fix the periphery of a capture net to a shoreline or a valley, and that both sides of the capture net are attached to struts erected on the valley (Patent Documents 2 and 3).
Most of the conventional trapping nets are formed by crossing steel ropes to form a square mesh.

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

The conventional falling catch net has the following problems.
<1> In a falling object catching net that does not fix the intersection of steel ropes, the mesh is easily expanded at the time of impact, and the catching effect is significantly reduced.
<2> In order for the falling net capturing net to exhibit its original capturing effect, it is necessary to fix the intersection of the steel ropes and maintain the original mesh size.
Even if the intersection of the steel ropes is fixed with a gripping tool such as a wire clip, it is difficult to suppress the expansion / contraction deformation of the mesh by sliding the steel rope at the time of impact.
<3> In the falling object capture net in which the intersection of the steel ropes is fixed with a gripping tool, the impact load is lost due to sliding at the intersection of the steel ropes, so the diffusion range of the impact force is narrow, Stress concentrates on the horizontal rope located in the receiving range and it is easy to break.
<4> In a falling object capture net in which the intersection of steel ropes is fixed with a gripping tool, a large load acts on the vertical and horizontal steel ropes located in the receiving range, but the steel ropes located in the non-receiving range Since the impact load is not so large, the strength of the falling catch net is not fully utilized.
<5> To maintain the regularity of the mesh, it may be possible to knot the intersection of ropes like a fishing net, but the rigidity increases in proportion to the diameter of the steel rope. It is technically difficult to form a falling object catching net for applications in which a huge impact such as debris flow acts by knotting the rocks.

The present invention has been made in view of the above points, and an object of the present invention is to provide the following falling matter trapping net.
<1> Capable of maximizing the strength of the net body by increasing the dispersion performance of the impact force of the falling net capturing net.
<2> Excellent manufacturing processability and low cost.
<3> The contour shape of the net body can be changed according to the installation site, and the mesh size and mesh shape can be easily selected.
<4> The mesh size does not change at the time of impact.

The present invention is a falling trapping net used in a transmissive trapping structure, comprising a net body having a plurality of meshes, and a plurality of terminal mounting ropes extending from the left and right sides of the net body, The net body is configured by combining a plurality of single ropes having end rings at both ends, and a plurality of relay couplings arranged at intersections of the single ropes and capable of being pin-connected to the end rings of the single ropes. 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.
In another embodiment of the present invention, the plurality of single ropes and the plurality of relay coupling tools are combined so that the mesh of the net body has 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.

Since the present invention has the above-described configuration, any one of the following effects can be obtained.
<1> By constructing the net body by interposing a relay connector at the intersection of single cords, the shift of the intersection of each single cord is eliminated, and an impact load can be distributed and transmitted to the plurality of single cords through the relay connector.
Therefore, it is possible to transmit the impact force acting on a part of the falling object catching net to the entire net, and to maximize the strength inherent to the falling matter catching net.
<2> Since the falling material catching net can be manufactured by a simple operation of simply connecting a plurality of single ropes via the relay connection tool, the falling material capturing net is excellent in processability and can be manufactured at low cost.
Moreover, since the net body and the terminal attachment rope can be formed using a single rope having a common structure, the number of components is reduced.
<3> Without using a single continuous rope material, the net body can be manufactured according to the installation site simply by using multiple single ropes and multiple relay couplers, and the arrangement direction and overall length of single ropes can be changed. By simply doing this, the mesh size and mesh shape can be arbitrarily selected.
<4> There is no deviation of the intersection of each single cord at the time of receiving, and since the total length of the single cord does not change, the mesh size does not change, and the catching function of the falling object can be guaranteed.
<5> Since the end of the single rope and the relay connector are connected with a detachable mooring pin, the damaged single rope and the relay connector can be easily replaced, so repair of the fall-off object catching net Sexuality improves.
<6> Since the intersection of the ropes can be formed in a net shape without knotting, a steel rope material having a large diameter and high strength can be used for the single rope.
Therefore, it is possible to provide a high-strength catchment net that can resist a huge impact such as debris flow.

The perspective view of the falling thing catching net which concerns on Example 1. FIG. 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 Partial front view of the falling object catching net according to Example 2 The partial front view of the other falling thing catching net concerning Example 2 Explanatory drawing of Example 3 which applied the falling thing capture net to the transmission type capture structure It is explanatory drawing of Example 3, (a) is a top view of a permeation | transmission type | mold capture structure, (b) is a fragmentary sectional view of the support | pillar back part which tensioned and attached the terminal attachment rope via the back loop material, (c) ) Partial cross-sectional view of the back of the column showing the end attachment rope hooked to the column stopper

[Example 1]
<1> Outline of Falling-Food Capture Net A falling-flow catching net 10 according to the present embodiment will be described with reference to FIGS.
The falling object capturing net 10 is a lattice net used for a transmission type capturing structure.
The falling-net capturing net 10 includes a belt-shaped net main body 20 and a plurality of terminal attachment ropes 30 extending horizontally from the left and right sides of the net main body 20.
The net body 20 and the terminal attachment rope 30 include a plurality of single ropes 40 having

end rings

41 and 41 at both ends, and a plurality of relay couplers 50 that can be connected to the ends of the plurality of single ropes 40. It is configured in combination.

<2> Net Main Body The net main body 20 is a net-like object in which a plurality of single ropes 40 are arranged in the vertical direction and the horizontal direction, and a relay connector 50 is interposed at the intersection of the single ropes 40.
The plurality of single ropes 40 arranged in the lateral direction are located on the same line via the relay connector 50 and constitute a continuous horizontal rope 42.
The plurality of single cords 40 arranged in the vertical direction are located on the same line via the relay connector 50 and constitute a continuous longitudinal cord 43.
The plurality of transverse cords 42 and the plurality of longitudinal cords 43 intersect and are assembled in a lattice shape.

<2.1> Single rope The single rope 40 is a combined rope material constituting the net body 20 and the terminal attachment rope 30.
As shown in FIG. 2, the single rope 40 is made of a steel or fiber rope in which one or a plurality of strands are twisted, and has endless rings 41 at both ends thereof.
As the trapping net 10 for the transmission type trapping structure, a high strength steel rope material is used for the single rope 40, and both ends of the steel rope material are folded and iced or compressed to form an end ring 41. To do.
The total length of the single cord 40 is appropriately selected in consideration of the mesh A size, the net mounting length, and the like.

<2.2> Relay Connector The relay connector 50 is a connector for detachably connecting the plurality of single cords 40.
The relay connector 50 illustrated in FIGS. 3 and 4 will be described. The relay connector 50 includes a pair of

single plates

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

single plates

51 and 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 can be connected to the end ring 41 together with the pair of

single plates

51, 51 to connect the single cable 40 and the relay connector 50 in a pin structure. The single cable 40 is connected to the relay connector 50. The mooring pin 52 can be turned around.

<2.3> Mesh Describing with reference to FIG. 5, the falling object catching net 10 has a square mesh A surrounded by four single ropes 40 and four relay connectors 50 arranged in the vertical and horizontal directions. It is defined.
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 40.
At the time of impact, the planar shape of the mesh A changes in size, but the overall length of each single cord 40 that defines the mesh A does not change, so the mesh size of the mesh A does not change.

<2.4> Intersections of single ropes Since the relay connector 50 is interposed at the intersections of the single ropes 40, the intersection points of the single ropes 40 do not move.
And since the intersection of each single cord 40 does not shift | deviate, not only the load between the several single cords 40 connected with the relay connection tool 50 is possible, but the transmission loss of load can also be reduced significantly.

<3> Terminal Attaching Rope The terminal attaching rope 30 is a rope provided on the left and right sides of the net body 20, and the net body 20 is attached to a rigid structure such as a column erected on the valley through the terminal attaching rope 30.
The plurality of terminal attachment ropes 30 are located on an extension line of the horizontal cable 42 constituting the net body 20 via the relay connector 50.
The connection structure between the terminal attachment rope 30 and the net body 20 is the same as the connection structure using the relay connector 50 shown in FIG.

<4> Method for assembling the falling object catching net As shown in FIG. 1, a plurality of single ropes 40 are arranged in the vertical and horizontal directions, and a relay-connecting connector 50 is interposed at the intersection of each single rope 40 to form a belt-like net body 20. Assemble.
The falling-item capturing net 10 can be assembled by simply connecting one end of the plurality of single ropes 40 to the left and right sides of the net body 20 via the relay connector 50 and assembling the terminal attachment ropes 30 in multiple stages.
In addition to being able to be assembled at the factory, the spillage catching net 10 can be assembled on site.
Alternatively, the net main body 20 may be manufactured in advance as a plurality of divided bodies, and the falling line capturing net 10 may be completed by adding a single cable 40 between the plurality of divided bodies that are subdivided into the site.
The completed falling trapping net 10 is attached to a column (rigid structure) via end rings 41 of a terminal mounting rope 30 extending horizontally from the left and right sides to complete the transmission trapping structure.
Since the falling object catching net 10 does not use a single continuous rope, it can be assembled into an arbitrary shape according to the shape of the site by combining a plurality of single ropes 40 and the relay connector 50.

[Sabo control function of catching nets for falling items]
Next, the sabo control function of the above-described falling matter capturing net will be described.

<1> During small and medium-sized floods FIG. 5 shows a falling matter catching net 10 arranged so as to cover a cross-sectional area of a river or the like, and the falling matter catching net 10 is stretched in a standing state with respect to the valley. Has been.
In the case of medium and small scale floods, gravel, mud, etc. of a size that does not cause a disaster flow down through the mesh A at the bottom of the falling catch net 10.

<2> When a debris flow occurs When a debris flow or the like occurs, the falling material catching net 10 captures a flowing material such as driftwood or debris larger than the mesh A, and flows out a falling material such as debris smaller than the mesh A that may be passed through. Can be made.
In the conventional trapping net, the crossing point of the steel rope is shifted and the mesh is expanded and deformed. However, in the present invention, the crossing point of each single rope 40 constituting the net body 20 is fixed so as not to be slidable. Will not be expanded and deformed and will not cause an excessively large fallout to flow out.
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 present invention, the intersections of the single ropes 40 constituting the net body 20 do not shift and the single ropes 40 can freely rotate at the intersections of the single ropes 40 via the relay connector 50. It has a structure.
Therefore, in the present invention, since the impact load can be distributed and transmitted to all the single cords 40 connected to the relay connector 50, the transmission loss can be extremely reduced, and it has acted on a part of the falling object capturing net 10. The impact force can be transmitted to the entire net, and the strength inherent in the falling object capturing net 10 can be maximized.
For example, when an impact force acts on the center portion of the net body 20 shown in FIG. 5, the impact force is transmitted in a chain manner to each single cord 40 located around the center portion of the net body 20 as indicated by the arrows. To go.
As described above, according to the present invention, the expansion deformation of the mesh A of the net body 20 can be effectively prevented, and the transmission performance of the impact load to the entire falling object trapping net 10 is enhanced. It can be controlled and suppressed efficiently.
Furthermore, the impact transmission performance of the falling object catching net 10 is enhanced, so that the burden load on a rigid structure such as a column supporting the falling object catching net 10 can be greatly reduced.

<3> Repair of Falling Object Capture Net The single rope 40 constituting the falling object capture net 10 is assembled to the relay connector 50 so as to be detachable.
Therefore, when some single ropes 40 are damaged, only the damaged single rope 40 is removed from the relay connector 50 and easily replaced with a new single rope 40 without replacing the entire falling object catching net 10. In addition, when the relay connector 50 is damaged, the relay connector 50 can be easily replaced and repaired.

[Example 2]
FIGS. 6 and 7 illustrate a falling material capturing net 10 according to another embodiment.
In the previous embodiment, a configuration was described in which a plurality of single ropes 40 are arranged so as to intersect in the vertical and horizontal directions, and the net main body 20 is configured by interposing a relay connector 50 at the intersections. May be assembled by crossing them diagonally.
FIG. 6 shows a form in which a rhombus mesh A is formed by crossing a plurality of single ropes 40 in an oblique direction except for the upper and lower sides and the left and right sides of the net body 20.
FIG. 7 shows a form in which a single mesh 40 arranged in a plurality of lateral directions and a single cable 40 arranged in a crossing oblique direction are crossed to form a triangular mesh A. FIG.
The net body 20 shown in FIG. 7 may be rotated 90 degrees.
Moreover, you may assemble the falling thing capture | acquisition net | network 10 by combining the form of the some net main body 20 shown to FIG.
In any form, the terminal attachment ropes 30 are attached to the left and right sides of the net body 20.

In this example, by changing the number of single ropes 40 connected to each relay connector 50, the shape of the mesh A in the net body 20 can be any geometric shape excluding a circle (triangle, square). , Rhombus, polygon, etc.) can be selected to change the strength of the net body 20.
Furthermore, by combining a plurality of single ropes 40 and a plurality of relay connectors 50, the contour shape of the net body 20 can be assembled into an arbitrary shape.

[Example 3]
With reference to FIGS. 8 and 9, an example of attachment of the falling object capturing net 10 will be described.
In this example, a case where the falling matter capturing net 10 is horizontally placed between the

columns

60 and 60, which are rigid structures standing on the valley with a predetermined interval, will be described.

<1> Winding of the terminal attachment rope of the falling object catching net The above-described falling matter catching net 10 is arranged on the side surfaces of the

circular pillars

60, 60, and the single rope 40 is made from both sides of the net body 20. The end side of each terminal attachment rope 30 is wound around the circumferential surface of each column 60 by a half circumference.
A plurality of stoppers 61 project from the outer peripheral surface of the support column 60 in accordance with the mounting height of the terminal mounting rope 30.
In this example, a configuration is shown in which the stopper 61 protrudes from the outer surface of the support column 60, but the stopper 61 extends from the front surface side of the support column 60 (the installation side of the falling object catching net 10) to the rear surface side of the support column 60 (the back loop material 60. What is necessary is just to project on the peripheral surface of the section to the installation side).
The end ring 41 of each end attachment rope 30 wound around the circumferential surface of each support column 60 is covered with each corresponding stopper 61.
The reason why the end ring 41 of the terminal attachment rope 30 is sheathed on the stopper 61 is to restrict the movable range of the end ring 41 (the sliding amount of the terminal attachment rope 30) to a certain range by the stopper 61.

<2> Stretching the falling object catching net by the back loop material While pulling each end attachment rope 30 independently, the end ring 41 is hooked on the stopper 61 and the falling matter catching net 10 is stretched between the

adjacent columns

60, 60. Although it is possible to install, the weight of the falling object catching net 10 is added, so that a large tension is required to tension each terminal attachment rope 30 individually.
Therefore, as shown in FIG. 9, a back loop member 70 made of a rope material having a length more than twice the span of the support column 60 is inserted between the end rings 41 of the terminal attachment rope 30 on both the left and right sides. Each terminal attachment rope 30 is tensioned by passing and tightening the back surface loop member 70 in the diameter reducing direction.
The overlapping portion of the back loop member 70 is fixed so as not to slide with a fixing tool 71 such as a wire clip.
Since the end ring 41 of the terminal attachment rope 30 plays the role of a moving pulley when the terminal attachment rope 30 is tensioned, the falling loop is captured between the

adjacent columns

60 and 60 by pulling the back loop member 70 with a small tension. The net 10 can be stretched with no slack.
FIG. 9B shows a state in which the rear loop member 70 is tensioned and the proximal end side of the end ring 41 of the terminal attachment rope 30 hits the stopper 61.

<3> Transmission path of impact force In this example, the impact force acting on the falling object capturing net 10 is supported through the following path.

<3.1> Supporting action of impact force by back loop material When a debris flow or the like collides with the falling object catching net 10, the impact force is transmitted to the back loop material 70 via the

terminal attachment ropes

30 and 30, and the back loop material The impact force is supported by 70.
As described above, since the end ring 41 of the terminal attachment rope 30 plays the role of a moving pulley, the load burden of the impact force by the back loop member 70 can be greatly reduced.
Therefore, the back loop member 70 can be handled by a low-strength small-diameter rope member, and the fixture 71 can be handled by a small one.
The impact force acting on the falling material capturing net 10 is dispersed and supported by the single structure falling material capturing net 10 and the double structure back surface loop member 70.

<3.2> Supporting action of impact force by support column The back surface loop member 70 is extended with the impact. As the back surface loop member 70 extends, the end ring 41 of the terminal attachment rope 30 with respect to the stopper 61 projecting from the support 60 is dragged toward the falling object catching net 10, and the tip of the end ring 41 abuts against the stopper 61. Thus, sliding of the terminal attachment rope 30 is restricted.
FIG. 9C shows a state in which the tip of the end ring 41 of the terminal attachment rope 30 hits the stopper 61.
The sliding amount of the terminal attachment rope 30 is obtained from the total length of the end ring 41 of the terminal attachment rope 30.
Therefore, the impact force acting on the falling object catching net 10 is transmitted to the support 60 through the stopper 61, and finally the impact force is supported not only by the falling matter catching net 10 and the back loop member 70 but also the support 60 in cooperation. become.
By adding the support column 60 to the impact force support member, the load burden on the back surface loop member 70 is reduced.
As described above, in this example, the impact force acting on the falling object capturing net 10 can be supported by the back loop material 70 first and then finally supported by the support column 60.

10 ... Falling thing catching net 20 ... Net body 30 ... Terminal attachment rope 40 ... Single rope 41 ... End wheel 42 ... Side Cable 43 ... Longitudinal cable 50 ... Relay connector 51 ... Single plate 52 ... Mooring pin 60 ... Post (rigid structure)
70: Back loop material 71: Fixing tool

Claims

A falling catch net used for a transmissive catch structure,
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 net body has a plurality of single ropes having end rings at both ends,
It is arranged at the intersection of the single ropes, and is configured by combining a plurality of relay couplers capable of pin connection with the end rings of the single ropes,
The terminal attachment rope is composed of the single rope connected to the left and right sides of the net body via a relay coupling tool,
Falling goods catch net.
2. The falling-item capturing net according to claim 1, wherein the plurality of single ropes and a plurality of relay couplings are combined so that the net of the net body has a geometric shape excluding a circle. .
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 falling material capturing net according to claim 1 or 2.
The net body comprises a plurality of single ropes arranged obliquely intersecting with each other and a plurality of relay couplings interposed at the intersections of the single ropes, and the mesh has a rhombus shape. 2. A falling material capturing net according to 2.
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 falling material capturing net according to claim 1, wherein the mesh has a triangular shape.
5. The relay connector according to claim 1, 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 falling material capturing net according to one item.
6. The relay connector according to claim 1, further comprising: a pair of single plates arranged opposite to each other, and a plurality of mooring pins that can be inserted and removed between the single plates. The falling material capturing net according to one item.