JP4213839B2 - Shock absorber and protective fence provided with this shock absorber - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, an impact force or the like is provided on a member which acts, to a safety barrier having a gentle shock apparatus adapted to absorb the impact force.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, for example, a protective structure that prevents a disaster by capturing rocks, debris flows, landslides, or avalanches is known.
By the way, in such a protective structure, it is desired not only to capture rockfall, debris flow, landslide collapse, or avalanche, but also to efficiently absorb the impact force at the time of capture.
[0003]
[Problems to be solved by the invention]
The present invention has such a was made under the conventional demands, comprises rockfall a collision impulsive force efficiently absorbed to, debris flow, landslides, or the shock absorber capable of reliably capturing the avalanche etc. The purpose is to provide a protective fence.
[0004]
[Means for Solving the Problems]
Guard fence provided with a shock absorber according to claim 1 of the present invention, in order to achieve the object described above, a guard net which is assembled to the net by weaving a plurality of strands formed in a spiral shape, this A wire that is inserted through the protective net to support the protective net and a plurality of support posts to which the wire is fixed, and a shock absorber is attached to the wire. A pair of shock absorber components to be moved, and these shock absorber components are superimposed so as to be relatively movable in the direction of action of the tensile load. A buffer rod is provided along a direction orthogonal to the direction, and the other shock absorber structure is allowed to collide with the buffer rod when the tensile load acts on both shock absorber structures. By Rukoto, characterized in that the breaking member for breaking the buffer rod is provided.
According to a second aspect of the present invention, there is provided a protective fence provided with the shock absorber according to the present invention . The protective fence is formed by weaving a plurality of spirally formed strands into a net, and the protective net is inserted into the protective net. A wire that supports the net, a plurality of support posts to which the wires are fixed, and an anchor wire that connects the support posts to an anchor provided in the vicinity of the support posts. A shock absorber is mounted on one side, and the shock absorber includes a pair of shock absorber components that are acted upon by a tensile load, and these shock absorber components are superimposed so as to be relatively movable in the direction of action of the tensile load. One shock absorber structure is provided with a shock absorber rod along a direction perpendicular to the direction of action of the tensile load, and the other The device structure, when the tensile load on both the shock absorber structure is applied, by being collided to the buffer rod, characterized in that the breaking member for breaking the buffer rod is provided.
According to a third aspect of the present invention, there is provided a protective fence including the shock absorber according to the first aspect of the present invention, wherein the shock absorber rod according to the first or second aspect of the present invention is arranged along the direction in which the tensile load acts on the one shock absorber structure. And a plurality of them are provided in parallel.
According to a fourth aspect of the present invention, there is provided a protective fence including the shock absorber according to any one of the first to third aspects. A large locking rod is provided, according to any one of claims 1 to 3 .
The protective fence provided with the shock absorber according to claim 5 of the present invention is such that the one shock absorber structure according to any of claims 1 to 4 is formed in a cylindrical shape. The breakage member of the other shock absorber structure is inserted into one shock absorber structure, and the shock absorbing rod is provided through the one shock absorber structure and the breakage member.
According to a sixth aspect of the present invention, there is provided a protective fence provided with the shock absorber according to any one of the first to fifth aspects, wherein the breakage member according to any one of the first to fifth aspects is formed in an oval shape along the direction of action of the tensile load. And disposed so as to surround the buffer rod.
According to a seventh aspect of the present invention, there is provided a protective fence including the shock absorber. A protective net formed by weaving a plurality of spirally formed strands into a mesh shape, and a protective net inserted through the protective net. The wire includes a wire that supports the net and a plurality of columns to which the wire is fixed, and a shock absorber is attached to the wire. The shock absorber is subjected to a tensile load and overlaps with each other. A pair of shock absorber constituents disposed and a covering provided to surround these shock absorber constituents, each of the shock absorber constituents protruding from each end of the covering. The covering body is provided with a plurality of buffer rods penetrating each of the shock absorber constituent bodies at intervals in the acting direction of the tensile load, and the buffer rods are attached to the shock absorber constituent bodies. Nde provided, when the tensile load on each of these shock absorber structure is applied, characterized in that the breaking member of sequentially breaking the respective buffer rod is provided.
A protective fence having a shock absorber according to claim 8 of the present invention includes a protective net formed by weaving a plurality of spirally formed strands into a net, and inserted through the protective net, A wire that supports the net, a plurality of support posts to which the wires are fixed, and an anchor wire that connects the support posts to an anchor provided in the vicinity of the support posts. A shock absorber is attached to one side, and the shock absorber is provided with a pair of shock absorber components that are subjected to a tensile load and arranged to overlap each other, and surrounds these shock absorber components. Each buffer device component is provided so as to protrude from each end of the cover member, and each buffer device component is provided on the cover member. A plurality of buffer rods penetrating therethrough are provided at intervals in the direction in which the tensile load is applied, and each buffer device structure is provided so as to surround each buffer rod. A breakage member is provided that breaks the buffer rods one after another when acting.
The guard fence provided with the shock absorber according to claim 9 of the present invention is provided with a locking rod having a breakage strength larger than that of the buffer rod at a substantially middle portion of the covering body according to claim 7 or claim 8. It is provided.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a shock absorber according to this embodiment. The shock absorber 1 includes a pair of shock absorber structures 2 and 3 to which a tensile load is applied. , Superimposed on the direction of action of the tensile load (indicated by an arrow in FIG. 1) so as to be relatively movable, and one of the shock absorber components 2 has a direction perpendicular to the direction of action of the tensile load. A buffer rod 4 is provided, and the other buffer device structure 3 is caused to collide against the buffer rod 4 when the tensile load is applied to both buffer device structures 2 and 3. It has the schematic structure in which the breakage member 5 which breaks is provided.
[0006]
Next, these details will be described. In the present embodiment, the one shock absorber structure 2 is constituted by a metal cylindrical tube, and penetrates the one shock absorber structure 2 in the radial direction. Thus, the buffer rod 4 is mounted.
[0007]
As shown in FIGS. 1 and 2, the buffer rods 4 are provided with bolts, and a plurality of the buffer rods 4 are provided in parallel at intervals along the direction of action of the tensile load.
[0008]
Further, a locking rod 6 having a breaking strength larger than that of the buffer rod 4 is provided at one end of the one shock absorber constituting body 2, and this locking rod 6 is also the same as the buffer rod 4 described above. Bolts are used, and are mounted so as to penetrate the one shock absorber structure 2 in the radial direction and in parallel with the buffer rod 4.
[0009]
The breakage member 5 is formed in an oval shape along the direction of action of the tensile load, and the breakage member 5 is inserted into and superimposed on the one shock absorber component 2. The buffer rod 4 and the locking rod 6 are positioned so as to surround them.
[0010]
Moreover, the through-hole 7 used when fixing this one buffering device structure 2 to another structure is formed in the opposing wall part of the other end of said one buffering device structure 2 to radial direction. Are formed along.
[0011]
Furthermore, a hook member 8 for connection integrally connected to the other end portion of the breakage member 5 is provided at the other end portion of the other shock absorber constituting body 3, and the other shock absorber constituting body is provided. It is used when 3 is fixed to another structure.
[0012]
The shock absorber 1 according to the present embodiment configured in this manner is fixed to the structure by fixing the shock absorber structures 2 and 3 to different structures through the through holes 7 and the hook members 8. It is attached.
[0013]
When an impact force is applied to one of the structures, a tensile load acts on the shock absorber 1 in the direction of extending its length. When this load is small, the shock absorber rod 4 positioned at the head is applied. Moreover, the said load is supported by making the edge part of the breaking member 5 of the other buffering device structure 3 contact | abut.
[0014]
When a large tensile load is applied, the buffer rod 4 is sequentially broken according to the magnitude of the load by the break member 5, and when the buffer rod 4 is broken, the load is absorbed, The impact force acting on the structure is absorbed and relaxed, an efficient buffer function is obtained, and the structure can be protected from the impact force.
[0015]
Here, the buffer function of the shock absorber 1 can be made appropriate by appropriately setting the diameter and the number of the buffer rods 4 according to the assumed impact force.
Then, after the impact force is alleviated by the breakage of the buffer rod 4, the breakage member 5 is locked by the locking rod 6 having a higher breakage strength than the buffer rod 4, thereby both structures. Is prevented from being completely separated.
[0016]
Next, an embodiment of a protective fence including the above-described shock absorber 1 will be described with reference to FIGS. 4 and 5.
In these drawings, a protective fence denoted by reference numeral 10 includes a protective net 11 assembled in a net shape, a wire 12 inserted through the protective net 11 to support the protective net 11, and a plurality of the wires fixed thereto. The shock absorber 1 is attached to the wire 12.
This is because a plurality of wires 12 are fixed to the through-hole 7 of the one shock absorber structure 2 or the hook member 8 of the other shock absorber structure 3, and the wire 12 is fixed to the support 13. Thus, the shock absorber 1 is attached.
[0017]
The protective net 11 is formed by weaving a plurality of strands 14 bent in a saw blade shape as shown in FIG. 6, or a plurality of spiral nets as shown in FIG. For example, a material formed by weaving the strands 15 is used.
[0018]
The protective fence 10 configured in this manner captures falling rocks, debris flows, landslides, avalanches, etc. by the protective net 11 stretched between the support columns 13. Although it is transmitted to the support column 13 via the wire 12, the shock absorber 1 is interposed in the middle of the transmission path, so that the shock absorber 1 is operated by the same action as shown in the embodiment. The aforementioned impact force is absorbed.
[0019]
Here, the shock absorbing function of the protective fence 10 was simulated by a test apparatus as shown in FIG.
[0020]
First, the test apparatus of FIG. 8 will be described.
In this test apparatus, a pair of support blocks 20 are fixed in parallel on a fixed structure. Between these support blocks 20, the protective net 11 shown in FIG. While being positioned respectively, these both side portions are fixed to the respective support blocks 20 by a fixing plate 21 and a plurality of fixing bolts 22, and a pair of wires 12 are inserted through opposing edges of the protective net 11, Each end portion of these wires 12 is fixed to the fixing plate 21 with a bolt or the like, and the shock absorber 1 is interposed between one end portion of one wire 12 and the other end portion of the other wire.
Then, the spherical weight 23 is freely dropped from a predetermined height to the central portion of the protective net 11 installed in this way, and the change in the tension generated in the wire 12 and the amount of displacement are measured. The absorption action was simulated.
[0021]
The result is shown in FIG.
In this figure, a curve indicated by a broken line is a characteristic when the shock absorber 1 is not installed, and a solid line is a characteristic when the shock absorber 1 is installed.
From this result, when there is no shock absorber 1, the tension generated in the wire 12 is large, and the convergence of the change in tension is slow.
In such a state, a large impact force is applied to the wire 12 for a long time, and the wire 12 is easily damaged.
Therefore, there is a possibility that the capturing function of falling rocks and the like may be reduced.
[0022]
On the other hand, when the shock absorber 1 is provided, the maximum tension generated in the wire 12 is small (in the experiment, about 50% can be reduced), and the convergence of the tension is fast, The energy of the weight 23 can be absorbed quickly, and the impact force can be absorbed efficiently.
Moreover, damage to the wire 12 can be prevented, and falling rocks can be reliably captured.
[0023]
The time history of the tension acting on the wire 12 can be arbitrarily changed by changing the number and diameter of the buffer rods 4 or the installation interval. The performance of the shock absorber 1 can be extracted.
[0024]
On the other hand, as shown in FIG. 5, an anchor 25 is driven into a natural ground 24 located on the upstream side of the column 13, and the anchor 25 and the column 13 are connected by one or a plurality of anchor wires 26. It is conceivable that the shock absorber 1 is interposed in the anchor wire 26 and the shock absorber 1 can be installed in both the anchor wire 26 and the wire 12. is there.
The protective net 11 attached to the support column 13 may be provided on the upstream side of the support column 13 as shown by a solid line in FIG. 5 or on the downstream side of the support column 13 as shown by a broken line in FIG. Taken.
[0025]
Next, another embodiment of the present invention will be described with reference to FIG.
The shock absorber indicated by reference numeral 30 in this figure is subjected to a tensile load, and a pair of shock absorber components 31 disposed so as to overlap each other, and a covering provided to surround these shock absorber components 31 Each buffer device 31 is provided so as to protrude from each end of the cover 32, and a buffer rod 33 penetrating each buffer device 31 is provided in the cover 32. And a plurality of the shock absorber components 31 are provided so as to surround the buffer rods 33, and a tensile load acts on each of the shock absorber components 31. In this case, the breaker members 34 for sequentially breaking the buffer rods 33 are provided.
[0026]
More specifically, the breakage member 34 of each shock absorber structure 31 is formed in an oval shape as in the above-described embodiment, and a hook member 35 is integrally provided on one end side.
The both broken members 34 are inserted so as to be overlapped with each other in the covering body 32, and are positioned so as to surround the buffer rods 33, and the hook members 35 are positioned in the covering body 32. It protrudes on both sides and is fixed.
[0027]
The covering body 32 is formed in a cylindrical shape, and the buffer rod 33 penetrates in the radial direction and is provided at intervals in the length direction.
Further, a locking rod 36 having a breaking strength larger than that of the buffer rod 33 is attached to an intermediate portion in the length direction of the covering body 32.
[0028]
In the shock absorber 30 of the present embodiment configured as described above, the shock absorber 30 is installed via the hook members 35 of both shock absorber components 31.
When tension is applied via these hook members 35, the breakage members 34 of both shock absorber constituting bodies 31 are moved in the direction of being pulled out from the covering body 32, respectively. As the buffer rod 33 is sequentially broken, a buffer action is obtained as in the above embodiment.
[0029]
Then, after the buffering action by the buffer rod 33 is performed and all of the buffer rods 33 are broken, the breakage members 34 are locked by the locking rods 36, and the buffer device component 31 is removed. Is prevented.
[0030]
Note that the shapes, dimensions, and the like of the constituent members shown in the above embodiment are merely examples, and various changes can be made based on design requirements and the like.
For example, in the above-described embodiment, the buffer rod 4 is constituted by a metal bolt, and an example in which these are mounted by screwing to one of the shock absorber components is shown. It is also possible to make a shock-absorbing rod made of steel, and it is also possible to reinforce it by welding a cylindrical rod after passing through one shock-absorbing device constituting body 2.
[0031]
【The invention's effect】
Since the present invention is configured as described above, when a tensile load acts on the shock absorber, the relative movement of both shock absorber components occurs, and the shock absorber rod is broken by the breakage member due to this relative movement. An efficient shock absorbing function can be ensured by the impact force absorbing action when the shock absorbing rod is broken.
In addition, by providing a locking rod having a greater breakage strength than the buffer rod in one shock absorber structure, it is possible to prevent the two shock absorber structures from being separated even after the buffering action. It is possible to prevent the intervening structure from being detached. By providing a plurality of the buffer bolts, it is possible to easily cope with the magnitude of the assumed impact force.
Further, by constituting the buffer rod with a bolt, it is easy to assemble and replace after breakage.
Furthermore, by using such a shock absorber for the protective fence, the shock absorbing capacity of the protective fence can be greatly increased.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a shock absorber provided in a protective fence of the present invention.
2 is a longitudinal sectional view of one of the cushioning device structure which constitutes the slow衝装location.
3 is a side view of another buffering device structure which constitutes the slow衝装location.
4 is a front view of a safety barrier to slow衝装location was used.
5 is a side view showing a modified example of the slow衝装location was used fences.
FIG. 6 is a front view showing an example of a protective net used in the protective fence of the present invention.
FIG. 7 is a view showing another example of the protective net used in the protective fence of the present invention, as viewed from the axial direction of the strand.
FIG. 8 is a plan view showing a test apparatus for simulating the shock absorbing action of the protective fence of the present invention.
FIG. 9 is a diagram for comparing the impact absorption characteristics of the protection fence of the present invention with the impact absorption characteristics of a conventional protection fence.
10A and 10B show another embodiment of the present invention, in which FIG. 10A is a side view and FIG. 10B is a longitudinal sectional view.

Claims (9)

A protective net that is assembled in a net shape by braiding a plurality of strands formed in a spiral shape, a wire that is inserted through the protective net to support the protective net, and a plurality of support posts to which the wire is fixed A shock absorber is attached to the wire,
The shock absorber includes a pair of shock absorber components on which a tensile load is applied, and these shock absorber components are superimposed so as to be relatively movable in the direction of action of the tensile load. The body is provided with a buffer rod along a direction orthogonal to the direction in which the tensile load is applied, and the other shock absorber structure when the tensile load is applied to both shock absorber structures. The protective fence provided with the buffering device characterized by the fact that the breakage member which breaks this buffer rod by being made to collide with is provided. A protective net that is assembled in a net shape by braiding a plurality of strands formed in a spiral shape, a wire that is inserted through the protective net to support the protective net, and a plurality of support posts to which the wire is fixed , These struts are provided with anchor wires that connect to anchors provided in the vicinity of these struts, and a shock absorber is attached to at least one of the wires or anchor wires,
The shock absorber includes a pair of shock absorber components on which a tensile load is applied, and these shock absorber components are superimposed so as to be relatively movable in the direction of action of the tensile load. The body is provided with a buffer rod along a direction orthogonal to the direction in which the tensile load is applied, and the other shock absorber structure when the tensile load is applied to both shock absorber structures. The protective fence provided with the buffering device characterized by the fact that the breakage member which breaks this buffer rod by being made to collide with is provided. The buffer rod, the one of the shock absorber structure, the tension placed apart along the direction of action of the load, and, according to claim 1 or claim 2, characterized in that is provided with a plurality parallel Guard fence with a shock absorber. Wherein one end portion of one of the shock absorber structure, the cushioning device according to any one of claims 1 to 3, characterized in that a large locking rod breakage strength is provided than the buffer rod Guard fence provided . The one shock absorber structure is formed in a cylindrical shape, and the breakage member of the other shock absorber structure is inserted into the one shock absorber structure, and the buffer rod is connected to the one shock absorber. The protective fence provided with the shock absorber according to any one of claims 1 to 4 , wherein the protective fence is provided so as to penetrate the structural body and the breakage member. 6. The breakable member according to any one of claims 1 to 5 , wherein the breakage member is formed in an oval shape along an acting direction of the tensile load and is disposed so as to surround the buffer rod. A protective fence provided with the shock absorber according to claim 1 . A protective net that is assembled in a net shape by braiding a plurality of strands formed in a spiral shape, a wire that is inserted through the protective net to support the protective net, and a plurality of support posts to which the wire is fixed A shock absorber is attached to the wire,
The shock absorber includes a pair of shock absorber components that are subjected to a tensile load and are disposed so as to overlap each other, and a covering member that surrounds the shock absorber components, and each of the shock absorbers. A device structure is provided so as to protrude from each end of the covering body, and a plurality of buffer rods penetrating the shock absorber structure body are provided in the covering body at intervals in the acting direction of the tensile load. The shock absorber components are provided so as to surround the shock absorber rods, and when a tensile load acts on the shock absorber components, a breakage member is provided for sequentially breaking the shock absorber rods. A protective fence provided with a shock absorber . A protective net that is assembled in a net shape by braiding a plurality of strands formed in a spiral shape, a wire that is inserted through the protective net to support the protective net, and a plurality of support posts to which the wire is fixed , These struts are provided with anchor wires that connect to anchors provided in the vicinity of these struts, and a shock absorber is attached to at least one of the wires or anchor wires,
The shock absorber includes a pair of shock absorber components that are subjected to a tensile load and are disposed so as to overlap each other, and a covering member that surrounds the shock absorber components, and each of the shock absorbers. A device structure is provided so as to protrude from each end of the covering body, and a plurality of buffer rods penetrating the shock absorber structure body are provided in the covering body at intervals in the acting direction of the tensile load. The shock absorber components are provided so as to surround the shock absorber rods, and when a tensile load acts on the shock absorber components, a breakage member is provided for sequentially breaking the shock absorber rods. A protective fence provided with a shock absorber . The protective fence provided with the shock absorber according to claim 7 or 8 , wherein a locking rod having a greater breaking strength than the buffer rod is provided at a substantially middle portion of the covering body.

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