JP6047678B1 - Shock absorber - Google Patents

Abstract

An object of the present invention is to provide means capable of transmitting an impact force from a net to a horizontal rope without loss when a collision object is received. A shock absorber for receiving a collision object, wherein a net constituting a receiving surface of the collision object and a portion overlapping with the net are inserted into a mesh space inside the net, It comprises at least a horizontal rope having both ends fixed directly or indirectly to the installation surface with anchors. [Selection] Figure 1

Description

  The present invention relates to an impact absorber for receiving a colliding object that has fallen, and more particularly to an impact absorber that can be transmitted from a net to a lateral rope without loss when the impact object is received.

The impact absorbers for receiving and protecting the colliding object that has fallen are roughly classified into the following two types.
(A) Protection net type.
This type is installed on a slope and guides impacts such as falling rocks and earth and sand down the slope via a space provided between the net and the installation surface.
This type includes a pocket type in which the upright column portion is used as an entrance for an impact object, and a cover type in which a net is arranged to cover the impact object.
(B) Guard fence type.
It is installed on the installation surface such as the middle of the slope or the skirt, and is a type that stops the progress of the collision object to the back side of the net by arranging the net between the pillars as a capture surface.

For example, as the type (B), the applicant has previously conceived the rockfall protection fence described in Patent Document 1 below.
This rock fall protection fence is a structure in which a horizontal rope member and a protection net are attached to a plurality of pillars erected at predetermined intervals, and the horizontal rope member and the protection net are wound and connected by a coil member. .
This coil member is a member intended to omit the vertical rope by preventing the horizontal rope material from opening in the vertical direction.

JP 2003-105721 A

From the viewpoint of preventing the horizontal rope material from opening in the vertical direction, the coil member is usually provided partially at a location where the horizontal rope material and the protective net overlap.
However, when the coil coupling is partially performed, the horizontal rope material and the protective net are partially integrated, so that the horizontal rope material and the protective net interfere with each other halfway.
In this state, when the falling rock collides with the protective net, the impact force is not transmitted well from the protective net to the horizontal rope material, and the protective net cannot withstand the impact force, and there is a risk of leading destruction. It was necessary to select the strength of the protective net after considering the points.
In this regard, if the load transmission from the protective net (net) to the horizontal rope material (lateral rope) can be made favorable, the selection conditions for the protective net will be advantageous, and there will be benefits in terms of cost reduction. This left room for research and development.

  Accordingly, an object of the present invention is to provide means capable of transmitting an impact force from a net to a lateral rope without loss when a collision object is received.

A first invention of the present application to solve the above problems is an impact absorber for receiving a collision object, comprising a net that forms a receiving surface of the collision object with a rhombus metal mesh, and at least the net place of the intermediate portion, the portion overlapping with the net, Yes and only kept manner is inserted into the communication space, which is formed so as to penetrate between both side edges of the net by the mesh portion of said net, and other elements One or more horizontal ropes that can move in the communication space without being connected , and anchors that fix both ends of the horizontal ropes directly or via a shock absorber to the installation surface It is characterized by.
In addition, the second invention of the present application further comprises a plurality of support columns standing upright in the width direction of the installation surface in the first invention, and the upper edge of the net is connected to the support columns. Then, the net is suspended from the sloped valley side, and a guide space for guiding the collision object below the slope is formed between the net and the slope.
According to a third invention of the present application, in the first invention, the net is laid so as to cover a collision object existing on an installation surface.
Further, a fourth invention of the present application is the first invention, further comprising a plurality of support columns standing at intervals in the width direction of the installation surface, wherein at least the upper edge and the lower edge of the net are It is connected between support | pillars, The capture | acquisition surface which receives and captures the said collision object between said support | pillars with the said net | network is formed .

According to the present invention, at least one of the effects described below can be obtained.
(1) By making the horizontal rope pass through the mesh space of the net, the impact force received by the net can be immediately transmitted to the horizontal rope without loss. Therefore, the problem that the protective net is damaged first can be avoided.
(2) Since the horizontal rope is inserted into the mesh space of the net, the coupling coil is also unnecessary.
(3) Since the impact force transmitted to the lateral rope is absorbed by the shock absorber interposed between the anchor and the anchor, the impact absorption performance of the falling rock protection net as a whole can be increased. Further, the net and the horizontal rope are not damaged before the buffering function by the buffer device is exhibited.

The schematic front view at the time of applying this invention to a pocket type | mold protective net | network. The schematic side view of the protection net | network which concerns on FIG. Schematic which shows the behavior of the protection net | network at the time of an impact. The schematic front view at the time of applying this invention to an overturning protection net | network. The schematic side view at the time of applying this invention to a protection fence.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<1> Overall Configuration A first embodiment of the present invention will be described with reference to FIGS.
In this embodiment, a pocket type protective net A is assumed as an impact absorber.
As shown in FIGS. 1 and 2, the pocket-type protective net A includes a plurality of support columns 10 standing at intervals in the width direction of the slope, and a net suspended from the plurality of support columns 10 toward the slope valley side. 20 and a horizontal rope 30 having both ends fixed to the slope directly or indirectly by anchors in a state of being integrated with the net.
Details of each component will be described below.

<2> Column The column 10 is a member for providing the net 20.
The support column 10 is configured to be erected on the slope by other known methods such as a method of fixing through an anchor or a foundation provided on the slope, or a method of placing it on the slope and positioning it while taking a separate copy.
In the vicinity of the head of the support column 10, there is provided a connecting portion capable of connecting various holding materials and inserting a rope.

<3> Net The net 20 is a member for receiving a collision object from the slope mountain side.
This collision includes rock fall, earth and sand, snow cover, avalanche and so on.
The net 20 attaches the upper edge of the net to the connecting portion of the support column 10 and suspends it to the slope valley side, thereby receiving the falling rocks and guiding the space between the net 20 and the slope to the slope valley side. The guidance space A1 to be formed can be formed.

<3.1> Type of Net The material and shape of the net 20 can be determined as appropriate depending on the desired shock absorbing performance against the falling rock factor, and for example, a rhombus metal wire or a super hard metal wire can be used.
Among them, a particularly suitable example is a type of wire net having a continuous communication space in the thickness direction. This is for facilitating the integration work by allowing a horizontal rope, which will be described later, to be inserted into the net on a substantially straight line.
The rhombus wire mesh used as the net 20 in this embodiment is knitted so that the strands 21 are bent into a mountain shape at a constant pitch, and these strands 21 are continuously entangled with each other to form a rhombus mesh. Yes.
Therefore, the mesh of the rhombus metal mesh functions as a communication space 22 that is continuous in the lateral direction in the thickness direction of the net.
The vertical length L of this communication space is about half of the vertical width of the rhombus constituting the mesh.

  Note that the net according to the present invention may be a wire net having a configuration that does not have a continuous communication space in the thickness direction, such as a plain weave wire net. In this case, the horizontal rope is inserted so as to meander the mesh.

<4> Horizontal rope The horizontal rope 30 is a member provided at predetermined intervals in the vertical direction of the net.
The horizontal ropes 30 are generally provided at equal intervals on the upper edge portion, the single or plural intermediate portions, and the lower edge portion of the net 20, and these arrangement positions and the number of arrangement are appropriately determined. There is no particular limitation in FIG.
Each end of the horizontal rope 30 is fixed to the slope by a horizontal anchor 31.
The horizontal rope 30 and the horizontal anchor 31 may have a one-to-one relationship, or a plurality of horizontal ropes 30 may be connected to one horizontal anchor 31.

<4.1> Pairing of net and horizontal rope (insertion into mesh)
The horizontal rope 30 is integrated with the net 20 so that the impact force received by the net 20 is immediately transmitted to the horizontal rope 30.
In this embodiment, a horizontal rope 30 is inserted into the communication space 22 which is a mesh portion of a rhombus wire mesh used as the net 20.
Therefore, the horizontal rope 30 exhibits a state in which it can move in the longitudinal direction and the thickness direction of the net 20 within a range within the communication space 22 of the net 20.
Moreover, since the horizontal rope 30 is restricted to move in the vertical direction of the net 20 within a range within the communication space 22 of the net 20, the distance between the horizontal ropes 30 may be widened to cause an opening. Absent.

<5> Other members In addition, the following means can be provided in the present invention.
<5.1> Shock Absorber The shock absorber 40 is a member interposed between the lateral rope 30 and the lateral anchor 31. By this shock absorber 40, the horizontal rope 30 is indirectly fixed to the horizontal anchor 31.
When the tension | tensile_strength more than a predetermined value arises in the horizontal rope 30, the shock absorber 40 can exhibit an impact absorption function by slipping the horizontal rope 30 inside the apparatus.

<5.2> Mountain Side Retaining Material, Valley Side Retaining Material The pillar 10 of the present invention is provided with a mountain side reserving material 50 connected to the mountain side anchor 51 and a valley side reserving material 60 connected to the valley side anchor 61 as appropriate. You can also. What is necessary is just to design the arrangement | positioning aspect of these members suitably according to the conditions on the spot.
Moreover, you may interpose a buffer (not shown) separately between each anchor and the retentive material.
This shock absorber may be the same as or different from the shock absorber 40.

<5.3> Vertical Rope, Intersection Processing Tool In the net 20 of the present invention, a vertical rope disposed so as to be orthogonal to the horizontal rope 30 and an intersection processing tool for connecting the intersecting portions of the vertical rope and the horizontal rope 30. Etc. can also be provided (not shown).
In addition, when the function calculated | required by a vertical rope is only prevention of the opening between the horizontal ropes 30, since the opening between the horizontal ropes 30 can be prevented in this invention as mentioned above, you may abbreviate | omit a vertical rope.

<6> Function / Operation at the Time of Impact The function / operation at the time of impact of the protective net according to the present embodiment will be described with reference to FIG.
FIG. 3A is a plan view showing the relationship between the net and the horizontal rope in the initial state, and FIG. 3B is a cross-sectional view taken along the line II in FIG. Moreover, FIG.3 (c) is a top view which shows the relationship between the net | network and a horizontal rope in the impact of the collision object, and FIG.3 (d) is II-II sectional drawing in FIG.3 (c).

As shown in FIGS. 3A and 3B, the horizontal rope 30 is arranged in a movable state in a range within the communication space 22 of the net 20 at a normal time when the collision object X has not arrived.
From this state, when the collision object X arrives and the collision object X is received by the net 20, the impact force by the collision object X is first transmitted to the net, and the impact force causes the net 20 to extend and displace.

  On the other hand, since the movement of the horizontal rope 30 is limited to the range within the communication space 22 of the net 20, the net 20 is immediately connected to the horizontal rope 30 when the displacement of the net 20 exceeds the allowable value. The impact force is immediately transmitted to the horizontal rope 30 without loss.

Then, after the impact force is reliably transmitted to the lateral rope 30, the impact force is absorbed by the shock absorber 40 interposed between the lateral rope 31.
Further, when the shock absorber 40 is not provided, the horizontal anchor 31 which is a fixed point serves as a reaction force body and resists an impact force.

Thus, according to the protection net | network which concerns on this invention, the phenomenon which the net | network 20 breaks | ruptures or breaks first can be suppressed, without being able to transmit the impact force which the net | network 20 received to the horizontal rope 30. FIG.
Therefore, the resistance function of the lateral anchor 31 and the buffering function of the shock absorber 40 can be reliably exhibited against the impact of the collision object X.

A second embodiment of the present invention will be described with reference to FIG.
In the present embodiment, a cover-type protective net B is assumed as the shock absorber, and the collision object X existing on the installation surface is covered with the net 20.
Both ends of the horizontal rope 30 inserted into the communication space 22 inside the net 20 are connected to the shock absorber 40 and the horizontal anchor 31.
In the present embodiment, the shock absorber 40 is not an essential component.

  Also in the protective fence according to the present embodiment, the phenomenon that the net 20 breaks or breaks first against the impact force when the colliding object is peeled off from the installation surface and is about to fall is suppressed. The strength of the lateral rope 30 against the shock and the buffer function of the buffer device 40 can be surely exhibited.

A second embodiment of the present invention will be described with reference to FIG.
In the present embodiment, a protective fence B is assumed as an impact absorber, and the upper edge and the lower edge of the net 20 are connected to the plurality of support columns 10 to have a collision surface B1 of the collision object X. This is different from the protective network according to the first embodiment.
Both ends of the horizontal rope 30 inserted through the communication space 22 inside the net 20 are connected to a shock absorber 40 and a horizontal anchor 31 (not shown).
In the present embodiment, the shock absorber 40 is not an essential component.

  Also in the protective fence according to the present embodiment, the phenomenon that the net 20 is first broken or broken is suppressed, and the strength of the lateral rope 30 against the impact of the collision object X and the buffer function of the shock absorber 40 are surely exhibited. be able to.

A fourth embodiment (not shown) of the present invention will be described.
In the first to third embodiments, the net and the horizontal rope are integrated by inserting the horizontal rope into the mesh space inside the net. However, in the present invention, the portion of the horizontal rope that overlaps the net is integrated. A mode in which the coil is coupled to the net over the entire length may be adopted.
Even with this method, the impact force received by the net can be transmitted to the horizontal rope without loss.

DESCRIPTION OF SYMBOLS 10 Support | pillar 20 Net 21 Strand 22 Communication space 30 Horizontal rope 31 Horizontal anchor 40 Shock absorber 50 Mountain side retentive material 51 Mountain side anchor 60 Valley side retentive material 61 Valley side anchor A Pocket type protective net A1 Guidance space B Cover type protective net C Protection Fence C1 Trapping surface X Collision

Claims (4)

A shock absorber for receiving a collision object,
A net that forms a receiving surface of the collision object with a diamond wire mesh ,
Place in the middle portion of at least the net, a portion overlapping with said net, Yes and only kept manner is inserted into the communication space, which is formed so as to penetrate between both side edges of the net by the mesh portion of said net, other One or a plurality of horizontal ropes that are movable within the communication space without being connected to the elements of
An anchor that fixes both ends of the horizontal rope to the installation surface directly or via a shock absorber;
Comprising at least
Shock absorber. Further comprising a plurality of pillars standing upright in the width direction of the installation surface;
The upper edge of the net is connected to the support column, the net is suspended from the sloped valley side, and a guide space for guiding the collision object below the slope is formed between the net and the slope. The shock absorber according to claim 1.   The impact absorber according to claim 1, wherein the net is laid so as to cover a collision object existing on an installation surface. Further comprising a plurality of pillars standing upright in the width direction of the installation surface;
At least an upper edge and a lower edge of the net are connected between the columns, and the net forms a capturing surface that receives and captures the collision object between the columns. 2. The shock absorber according to 1.

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