JP5227060B2 - Shock absorber - Google Patents

Description

  The present invention relates to an impact buffer and an impact buffering method, and in particular, steep terrain such as a mountainous area and a coastline part, roads and railroads laid in the lower area thereof, rock fall to protect people, etc. The present invention relates to an impact buffer and an impact buffering method.

  For example, structures such as roads, railways, and buildings constructed on mountainsides may be exposed to the risk of falling rocks from an upper slope. For the purpose of avoiding human damage and damage to the construction facility itself from such rock fall, rock fall lining such as Tomon construction and rock shed is applied. However, there are cases where rock fall over the design load occurs due to the deterioration of the rock mass after the fall rock lining. In this way, a rockfall lining provided in a place where there is a risk of falling rocks exceeding the design load has its roof to disperse and absorb the energy of the rockfall to prevent the rockfall lining itself from being damaged. The buffer structure layer is provided in this part. For this buffer structure layer, a buffer material such as sand or EPS (Styrofoam) is generally used.

  However, when sand is used as the buffer material as described above, it is necessary to use a large amount of the sand in order to obtain a sufficient buffering effect to counteract the impact of falling rocks. Accordingly, the dead load increases, and the structure of the falling stone lining must be strengthened to withstand the dead load, resulting in an increase in construction costs.

  On the other hand, EPS has a smaller weight than sand, and even if it is used in a large amount as a buffer material, the dead load is small, so that a buffer effect can be obtained without strengthening the structure of the falling stone lining. However, in general, the construction of EPS in combination with other buffer materials becomes more complicated than the single use, and the cost increases. Moreover, since EPS itself is also an expensive material, there is a problem that if the thickness is increased in order to enhance the buffering effect, the cost may be increased accordingly.

  In addition, as common to the two cushioning materials of sand and EPS described above, when a rock falls, the cushioning material will be scattered by impact, so the buffering effect in the vicinity of the part where the stone has fallen becomes extremely weak. There was also the problem of being unable to withstand swarm rocks.

  On the other hand, as a prior art document relating to an impact buffer, Patent Document 1 describes an impact buffer formed by accommodating a plastic bottle in an accommodation bag. In this shock absorber, the impact force of the falling object is absorbed by the cushion action when the plastic bottle is crushed. According to this, since a used plastic bottle is used as a buffer material, cost can be reduced compared with the case where sand or EPS is used as a buffer material.

  However, in the shock absorber described in Patent Document 1, the cushioning action of each PET bottle is extremely small. Therefore, in order to absorb the impact of a large load falling object such as a large falling rock, By enlarging itself and accumulating a large amount of PET bottles along the direction of falling rocks, or by arranging a large number of accommodating bag bodies containing PET bottles along the direction of falling rocks, It is necessary to form a multilayer PET bottle layer to increase the buffering effect. It's like taking a bullet with cotton.

  However, the place where the falling rock falls is in a lower region of a steep terrain such as a mountain slope, so the space for construction is limited. Therefore, as described above, in order to obtain a sufficient impact buffering effect, there is a problem that it is difficult to dispose the impact buffer so as to increase the thickness of the PET bottle layer.

  In addition, as mentioned above, this shock buffer PET bottle absorbs the impact of falling rocks and exerts a cushioning action by being crushed, so once receiving a falling rock, it absorbs the impact force of falling rock again. I couldn't. Therefore, the problem that it is difficult to cope with swarms has not been solved.

  The present invention has been made in view of such circumstances, and an object thereof is to obtain a sufficient buffering effect with a relatively thin layer of buffer material without causing an increase in dead load and an increase in cost. Another object of the present invention is to provide an impact buffer and an impact buffering method capable of withstanding a swarm of falling rocks.

In order to solve the above-described problem, the shock absorber according to claim 1 is formed of a shock-absorbing material that is deformed when subjected to the impact force of falling rocks, and an elastically deformable member, and at least the side of the shock-absorbing material. A substantially cylindrical container that is held and accommodated from the side, and a restraining rope is provided around the outer surface of the substantially cylindrical container .

  According to the present invention, when a falling rock collides with this shock buffer, the impact force of the collision spreads from the collision position of the falling rock through the buffer material to the periphery thereof, but the buffer material is elastically formed from the side by the container. Since it is restrained, the impact force of the falling rock in the vertical direction is converted into a horizontal force through the buffer material and is more efficiently dispersed on the side of the container. And the energy of the impact of falling rocks can be absorbed and reduced by the deformation due to the impact force of the buffer material in the process of dispersion. When the dispersed impact force reaches the side portion of the container, the container is elastically expanded and deformed in the lateral direction, and the impact force is buffered by the stress. Furthermore, when the container is restored, the energy stored in the container is transmitted again to the buffer material and used for restoring the shape of the buffer material.

  Therefore, in the shock absorber according to the present invention, since the stress due to the elastic expansion and deformation of the container is used to buffer the impact force of the falling rock, a smaller amount of the buffer than the case where the buffer material is arranged as it is. Even when a material is used, a much higher shock absorbing effect can be obtained. As a result, the amount of the buffer material itself to be used can be reduced and the layer of the buffer material can be thinned, and an increase in dead load can be prevented, so that the cost of the buffer material can be reduced. The structure of equipment for disposing the shock absorber can be simplified and designed. Moreover, since the structure itself is a simple structure formed by accommodating the buffer material in the container, the cost for the construction cost can be reduced.

Further, in the shock absorber according to the present invention, since the shock absorbing material is accommodated in the container, it is possible to prevent the shock absorbing material from being scattered, and in addition, after the impact force of the falling rock is buffered, the elastic material is applied to the container. Since the restoring action works with force, it works to return to its original shape even after receiving a fallen rock. Therefore, even if a swarm of rocks occurs, an impact buffering effect can be obtained again.
Furthermore, since the container is restrained by the tension of the restraining rope, it is possible to prevent the container from being greatly expanded laterally during elastic expansion, and to substantially increase the stress during elastic expansion deformation. it can. Therefore, in particular, even when it is assumed that the amount of deformation at the time of elastic expansion and deformation of the container becomes large with a relatively high impact buffer, the deformation at the time of elastic expansion and deformation by using a restraining rope. Sufficient stress can still be obtained while reducing the amount.

The impact buffer according to claim 2 receives and receives the impact force of falling rocks and stores a plurality of gravel as a buffer material that disperses the impact force to the side, and holds the gravel at least from the side. A cylindrical container formed of a mesh structure that allows elastic deformation based on a lateral shape by receiving the dispersed impact force and a metal mesh having a connection structure between metal wires. Features .

According to the present invention, due to the structural features of the members knitted in a mesh shape, the impact force of falling rocks acting on the container is efficiently distributed throughout the container, and stress concentration at the local part can be prevented. . Therefore, the impact force of the falling rock can be distributed on the container in a well-balanced manner regardless of the collision angle and the collision position of the falling rock to the impact buffer. In addition, it is possible to obtain a desired elastic force for the container to function as a substantially elastic body with a wire mesh structure that does not use a large amount of material for the entire container. In addition, it is preferable that the member knitted in the net shape is a rhombus metal net, a turtle shell metal net, or a ring net.

According to a third aspect of the present invention, in the shock absorber according to the second aspect, the front wire mesh is a rhombus wire mesh, a turtle shell wire mesh, or a ring net .

According to a fourth aspect of the present invention, in the shock absorber according to the second or third aspect , the container is formed in a substantially cylindrical shape. According to the present invention, in the cylindrical container, as described above, the response of the stress of the container to the impact force of the falling rock dispersed through the buffer material is formed in another non-cylindrical shape. Compared to this, the amount of deformation due to the impact force of the falling rock that has reached the side of the container is small. Therefore, stress due to this elastic expansion deformation acts efficiently on the buffer material, and the effect of buffering the impact force of falling rocks can be enhanced.

  According to the present invention, since a non-uniform granular material is used as the buffer material, a certain gap is generated between the granular materials in the container. Therefore, the energy consumed by the collision and friction between the granular materials is uniform in the process in which the impact force is dispersed due to the collision of the falling rocks and in the process in which the impact force of the falling rocks is again transmitted to the granular material by the restoring force of the container. As compared with the case of using a granular material with a simple shape, the impact force of falling rocks can be reduced more efficiently.

According to a fifth aspect of the present invention, in the shock absorber according to any one of the first to fourth aspects, an upper end edge and / or a lower end edge of the side portion can be coupled to the container. A flexible cover body is provided.

  According to this, the cover body covers the upper edge and / or the lower edge of the side of the container with the flexible cover body, so that the side of the container is also constrained as a whole. The elastic force can be substantially increased. Moreover, it is possible to prevent the buffer material inside the container from being scattered outside from the expanded portion due to the impact of falling rocks. Furthermore, it is possible to prevent the buffer material from leaking out from the bottom of the container by providing the cover at the lower edge of the side of the container.

According to a sixth aspect of the present invention, there is provided the shock absorber according to any one of the first to fifth aspects, wherein the side surface portion of the container is partially in contact with the upper surface portion that receives the falling rock in the direction of falling rock. It is characterized by being placed and arranged in parallel with almost no gap in the state of facing.

  According to the present invention, since the shock absorber is disposed on the roof portion of the falling rock lining without any gap, the falling shock to the falling rock lining can be reliably received by the shock absorbing body. One impact buffer can exert its impact buffering effect without being completely constrained by surrounding buffers due to partial contact with each other. Further, even when one impact buffer receives a relatively large rock fall and the container is greatly elastically expanded and deformed, the impact force of the fall rock from the shock buffer actually receiving the rock fall due to this deformation Transmit to shock absorber. Therefore, the impact force of one falling rock can be substantially buffered by using the impact buffering effect of a plurality of impact buffers.

According to a seventh aspect of the present invention, there is provided the shock absorber according to the sixth aspect, wherein the shock absorbers are arranged as a group of shock buffers that are bound in parallel with each other using a binding means. To do.

  According to the present invention, the impact buffer according to any one of claims 1 to 6 is coupled to each other to form an impact buffer group, thereby substantially obtaining one large impact buffer. be able to. In particular, this shock buffer group has a larger shock buffering effect than the case where a single shock buffer body is formed with the same size, so that even a large falling rock impact force can be effectively buffered. it can.

  According to the shock absorber of the present invention, the impact force of the falling rock in the vertical direction is efficiently converted into the force in the horizontal direction and dispersed on the side portion side of the container. And in the process of this dispersion | distribution, since the buffer material absorbs the energy of the impact force of falling rocks, the impact force of falling rocks can be reduced. When the dispersed impact force reaches the side portion of the container, the container is elastically expanded and deformed in the lateral direction, and the impact force is buffered by the stress. Further, when the container is restored, the energy stored in the container is transmitted again to the buffer material and used for restoring the shape of the buffer material.

  Therefore, in the shock absorber according to the present invention, since the stress due to the elastic expansion and deformation of the container is used to buffer the impact force of the falling rock, a smaller amount of the buffer than the case where the buffer material is arranged as it is. Even when a material is used, a much higher shock absorbing effect can be obtained. As a result, the amount of the buffer material itself to be used can be reduced and the buffer material can be made thinner, so that the cost of the buffer material can be reduced, and an increase in dead load can be prevented. It is possible to simplify the structure of the equipment for arranging the components. Moreover, since the structure itself is a simple structure formed by accommodating the buffer material in the container, the cost for the construction cost can be reduced.

  Further, in the shock absorber according to the present invention, since the shock absorbing material is accommodated in the container, it is possible to prevent the shock absorbing material from being scattered, and in addition, after the impact force of the falling rock is buffered, the elastic material is applied to the container. Since the restoring action works with force, it works to return to its original shape even after receiving a fallen rock. Therefore, even if a swarm of rocks occurs, an impact buffering effect can be obtained again.

  And by placing a plurality of impact buffers on the roof of the falling stone cover so as not to collide with the impact buffer due to elastic expansion deformation, the impact buffer is received and the impact is buffered by the falling stone cover. It is possible to prevent falling stones to construction facilities and people that are protected. Further, by combining the impact buffers together to form an impact buffer group, it is possible to function as one impact buffer having a higher buffering force than using the impact buffer alone.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory diagram for explaining a configuration of an impact buffer according to the present embodiment. As shown in the figure, the shock absorber 10 is a buffer material inside a container 12 having a substantially cylindrical shape having a diameter of about 0.5 to 1.5 m and a height of about 0.3 to 1.0 m and having an upper opening. It is formed by containing gravel 14.

  FIG. 2 is an explanatory diagram illustrating the configuration of the container 12. The container 12 has a main body portion 16 formed of a wire mesh and a flexible cloth bag body 18 loaded in the main body portion 16. As shown in the figure, gravel 14 which is a buffer material is put in the bag 18 and accommodated in the container 12. In addition, the main body portion 16 of the container 12 of the present embodiment has a lower end edge of the side portion for the purpose of preventing the gravel 14 from leaking from the large spread and the lower side of the container 12 to be described later. It is preferable to provide a flexible cover body for joining the parts.

  FIG. 3 is a diagram illustrating a rhombus wire mesh that constitutes the main body portion 16 of the container 12. As shown in the figure, the rhombus wire mesh 20 is configured as one unit by combining bent wires 21 obtained by bending metal wires into a zigzag shape at the positions of the bent portions 21a and connecting the ends 21b. Yes.

  In the present embodiment, the main body portion 16 can be easily formed by appropriately deforming, cutting, connecting, and so on according to the substantially cylindrical shape of the main body portion 16 of the unit-shaped rhombus wire mesh 20 formed in this way. Can be formed. As described above, since the main body portion 16 of the container 12 is formed of a rhombus metal mesh, the container 12 has a rhombus metal mesh structure that does not use a large amount of material for the entire container 12, and the container 12 is substantially elastic. A desired elastic force for functioning can be obtained efficiently.

  On the other hand, the gravel 14 is formed in a mutually non-uniform shape having a particle diameter of about 3 to 10 cm and is accommodated inside the container 12. A fixed gap is generated between the gravels 14 in a state where the gravels 14 are housed in the container 12 due to their non-uniform shapes. The bag 18 is provided so that the small-diameter gravel 14 does not spill out from the mesh of the main body 16 formed of a rhombus metal mesh. In the present embodiment, various materials such as cloth, non-woven fabric, polyester, polypropylene, or vegetable fiber can be used for the bag body 18.

  4A shows the direction of dispersion of the impact force of the falling rock 22, and FIG. 4B shows the direction of stress due to the elastic expansion deformation of the container 12. 5 is a diagram showing a state in which the container 12 is elastically expanded and deformed, and FIG. 6 is a diagram showing a state in which the container 12 has been restored.

  As shown in FIG. 4A, when the falling rock 22 collides with the impact buffering body 10, the impact force of the collision is converted into a horizontal force through the gravel 14 and accommodated from the collision position A of the falling rock 22. It is dispersed in the side portion 12a side of the body 12, that is, in the direction of the arrow in the figure. In the present embodiment, since the gravel 14 is elastically restrained from the side by the container 12, the above-described conversion of the impact force into the horizontal direction is performed more efficiently.

  Further, in the process in which the impact force of the falling rock 22 is dispersed, the impact force causes a collision between the gravels 14. And the impact force of the falling rock 22 is reduced by the energy consumed by the collision and frictional force between the gravels 14. The energy of impact of the falling rock 22 is consumed by the energy, so that the impact force of the falling rock 22 is reduced. In particular, in the present embodiment, the gravel 14 having a non-uniform shape is used as the buffer material, so that it is consumed due to collision and friction between the buffer materials compared to the case where the buffer material having a uniform shape is used. Since the energy increases, the impact force of the falling rock 22 can be efficiently reduced.

  When this impact force reaches the side portion 12a of the container 12, as shown in FIG. 5, the container 12 is elastically expanded and deformed in the lateral direction, and stress (FIG. 4B) due to the elastic expansion and deformation. The impact force of rock fall is buffered in the direction of the arrow. In particular, in the present embodiment, since the container 12 is substantially cylindrical, the stress response of the container 12 due to the impact force of the falling rock 22 dispersed through the gravel 14 as described above is another non-columnar shape. As compared with the case where the container is formed, the deformation amount due to the impact force of the falling rock 22 reaching the side portion 12a of the container 12 is small. Therefore, the stress due to this elastic expansion deformation acts on the gravel 14 efficiently, and the effect of buffering the impact force of falling rocks can be enhanced.

  Then, after the impact force of the falling rock 22 is buffered by the stress due to the elastic expansion and deformation of the container 12, before the shock buffer 10 receives the impact force of the falling rock as shown in FIG. It is deformed so that it almost returns to its original shape (the direction of the restoring force is indicated by the arrow in the figure). Thereby, the impact buffer 10 can exhibit the impact buffer effect again even if a swarm of swarms occurs. Further, at the time of this restoration, the energy stored in the container 12 is again transmitted to the gravel 14 and is consumed again by the collision and friction of the gravel 14.

  As described above, in the shock absorber 10 according to the present embodiment, since the stress due to the elastic deformation of the container 12 is used to buffer the impact force of the falling rock 22, the gravel 14 is arranged as it is. Even when a small amount of gravel 14 is used, a much higher shock absorbing effect can be obtained. Thereby, the quantity of gravel 14 to be used can be reduced, the gravel 14 layer can be made relatively thin, and the cost for the gravel 14 can be reduced. Moreover, since the increase of the dead load by using gravel 14 in large quantities can be prevented, the structure of the installation which arrange | positions the impact buffer 10 can be designed simply. Furthermore, since the structure itself is a simple structure in which the gravel 14 is accommodated in the container 12, the cost for the construction cost can be reduced.

  Further, since the container 12 is formed of the rhombus metal mesh 20 as described above, the impact force of falling rocks acting on the container 12 is efficiently dispersed throughout the container 12, thereby preventing stress concentration. it can. Therefore, the impact force of the falling rock 22 can be dispersed on the container 12 in a well-balanced manner without depending on the collision angle and the collision position of the falling rock on the impact buffer 10.

  FIG. 7 is a diagram illustrating a state in which the shock absorber 10 according to the present exemplary embodiment is disposed on the roof portion of the falling stone cover. As shown in the figure, the shock absorber 10 having a substantially cylindrical shape has its outer surface, that is, the side portion 12a of the container 12 in contact with each other, and the upper surface portion that receives the rock fall 22 is directed upward in the direction of the rock fall. In a state, a plurality of parallel mountings are arranged on the roof part 30 of the falling rock lining in almost no gap. In addition, when the shock absorber 10 having a substantially cylindrical shape is disposed, if a gap portion where the shock absorber 10 is not disposed is formed in the vicinity of the end portion of the roof portion 30 of the falling stone cover, for example, relatively A small elliptical shock absorber 11 is arranged.

  With such an arrangement method, the impact buffer 10 can be reliably received by the impact buffer 10, and one impact buffer 10 is surrounded by a partial contact between the impact buffers 10. The impact buffering effect can be exhibited without being completely restrained by the impact buffer 10. Further, even when one shock buffer 10 receives a relatively large rock fall 22 and the container 12 undergoes a large elastic expansion deformation, the impact force of the rock fall 22 actually receives the rock fall 22 due to this deformation. It is transmitted from the shock absorber 10 to the surrounding shock absorber 10. Therefore, the impact force of one falling rock 22 can be substantially buffered by using the impact buffering effect of the plurality of impact buffers 10.

  FIG. 8 is a view showing an example in which a restraining rope is provided along the side surface of the container 12. As shown in the figure, a restraining rope 24 is provided around the side surface of the container 12. In the present embodiment, a friction locking clip 25 that locks the rope using the friction between the rope and the metal is provided in a portion where the rope is doubled when the restraining rope 24 is wound around the container 12. The restraint rope 24 is fixed to the container 12. Since the container 12 is constrained by the tension of the restraining rope 24, it is possible to prevent the container 12 from spreading greatly to the side during elastic expansion and deformation, and the stress of the container 12 is substantially reduced. Can be increased. Accordingly, even when the shock absorber 10 is designed to be relatively high and the amount of deformation at the time of elastic expansion and deformation is assumed to be large, the deformation at the time of elastic expansion and deformation by using the restraining rope 24 is assumed. Sufficient stress can still be obtained while reducing the amount.

  FIG. 9 is a view for explaining the container 12 provided with a flexible upper cover body. As shown in the drawing, the upper cover body 27 is formed of a rhombus metal mesh, similarly to the main body portion 16 of the housing body 12, and is coupled to the upper edge of the side portion 12 a of the housing body 12. Thereby, since the container 12 is restrained by the upper cover body 27, the elastic force of the container 12 can be substantially increased, the force of buffering the impact of the falling rock 22 and the capacity of the container 12 after the shock buffering. The restoration effect can be further increased. Further, it is possible to prevent the upper opening of the container 12 from spreading due to the impact force of falling rocks and the gravel 18 inside to be scattered outside.

  In the present embodiment, the container 12 is formed in a substantially cylindrical shape, but is not limited thereto, and is formed in various other shapes such as an elliptical columnar shape or a cubic shape. May be. In addition, the constituent member of the container 12 is not a rhombus metal mesh, but various metal meshes such as a turtle shell-type metal mesh or a net-like material such as a ring net system can be used. Furthermore, a container having a structure other than a metal mesh formed of metal, resin, or the like may be used as the container as long as it does not easily undergo plastic deformation or breakage due to the impact force of falling rocks.

  Further, in the present embodiment, the upper cover body 27 is provided on the housing body 12. However, instead of the upper cover body 27 or in combination with the upper cover body 27, the upper edge of the side portion 12 a of the housing body 12 is used. It is also possible to provide a connecting rope or the like for connecting and constraining the opposing positions of the parts to prevent the upper opening of the container 12 from spreading due to the impact force of falling rocks and to substantially increase the elastic force of the container 12 It is. Moreover, you may provide a connection rope not in the upper end edge part of the main-body part 16, but the side parts which oppose in the middle position of the main-body part 16, for example. Thereby, it is possible to prevent the container 12 from being excessively expanded and deformed laterally in the elastic expansion and deformation caused by the impact of falling rocks.

  FIG. 10 is a view for explaining an impact buffer group 26 formed by a plurality of impact buffers 10. As shown in the figure, the shock buffer group 26 is formed by bundling a plurality of the shock buffers 10 described above using a metal binding rope 28 as a binding means. In particular, in the present embodiment, the shock absorber group 26 is formed by bringing the outer surfaces of the containers 12 of the seven shock absorbers 10 into contact with each other and winding the binding rope 28 along the circumferential direction in that state. Is forming. The shock buffer group 26 formed in this way substantially functions as one large shock buffer. In particular, since the shock buffer group 26 has a larger shock buffering effect than a case where a single shock buffer body is formed in the same size, it can effectively buffer even the impact force of a large falling rock. Can do. Then, by arranging the shock buffer group 26 on the roof portion 30 of the falling stone cover as in the case of the shock buffer 10 described above, the same effect as in the case of arranging the shock buffer 10 is obtained. It is done.

  In addition, this invention is not limited to the said embodiment, A various change is possible within the range of the summary of invention. For example, in the present embodiment, gravel 14 that is a large number of granular materials is used as a buffer material, but the present invention is not limited to this, and the impact force of falling rocks is dispersed on the side portion 12a side of the container 12. As long as it can be used, other various granular materials such as gravel and a single buffer material such as a high-density rubber body may be used.

  Further, the number of impact buffers 10 to be bound to form the impact buffer group 26 is not limited to the above-mentioned seven, but the expected rock fall size and the rock fall where the shock buffer group is installed. Various changes can be made according to the scale of the lining.

  Furthermore, in the arrangement method of the shock absorbers 10 in the present embodiment, the shock absorbers 10 are arranged with almost no gaps in order to reliably receive the rocks falling on the rock fall lining. In consideration of the elastic expansion of the shock buffer group 26, they may be arranged with a slight gap. In addition, the shock absorbers 10 according to the present embodiment are arranged in a state in which the part that receives the falling rocks is directed upward on the roof part 30 of the falling rock cover, assuming the falling rocks 22 from above. Assuming a rock fall from the lateral direction rolling on the slope, the impact buffer 10 may be arranged with the portion that receives the rock fall directed in the lateral direction, which is the direction of the rock fall.

  In the present embodiment, the impact buffer 10 is used for buffering the impact of falling rocks, but not only for falling rocks, but also for buffering the impact force of various impacting objects such as other falling objects. May be.

It is explanatory drawing explaining the structure of the impact buffering body concerning this Embodiment. It is explanatory drawing explaining the structure of a container. It is a figure explaining the rhombus metal mesh which comprises the main-body part of a container. It is a figure which shows the direction of the stress by the dispersion direction of the impact force of a falling rock, and the elastic expansion deformation of a container. It is a figure which shows the state which the container received elastic deformation. FIG. 5 is a diagram illustrating a state in which the container 12 is restored. It is a figure which shows the state which the container restored | restored. It is a figure which shows the state by which the shock-absorbing body is arrange | positioned at the roof part of the falling rock lining. It is a figure which shows the example by which the restraint rope was laid around along the side part of a container. It is a figure explaining the container provided with the cover body. It is a figure explaining the shock buffer group formed with the several shock buffer.

10 Shock absorber 12 Container 14 Gravel (buffer material)
20 Rhombus wire mesh 22 Falling stone 24 Restraint rope (restraint rope)
26 Impact buffer group 27 Upper cover body (flexible cover body)
28 Bundling rope (Bundling means)

Claims (7)

A cushioning material that deforms when subjected to the impact of falling rocks,
A substantially cylindrical container that is formed of an elastically deformable member and holds and holds the buffer material from at least the side , and
In the substantially cylindrical container,
An impact buffering body characterized in that a constraining rope is provided around the outer surface portion . A plurality of gravel as a buffer material that receives the impact force of falling rocks and distributes the impact force to the side,
By holding the gravel at least from the side and containing it, and by allowing the elastic deformation based on the shape to the side by receiving the distributed impact force, and a metal mesh provided with a connection structure between metal wires A formed cylindrical container; and
Impact buffer member and having a. The wire mesh is
The shock absorber according to claim 2 , wherein the shock absorber is a rhombus wire mesh, a turtle shell wire mesh, or a ring net . The impact buffer according to claim 2 or 3 , wherein the container is formed in a substantially cylindrical shape. In the container,
The impact buffer according to any one of claims 1 to 4, wherein a flexible cover body that joins the upper edge and / or the lower edge of the side portion is provided. The impact buffer according to any one of claims 1 to 5 ,
An impact buffering method characterized in that a plurality of side surfaces of the container are in contact with each other, and a plurality of upper surfaces for receiving rock fall are placed and arranged in parallel with substantially no gap in a state of facing the rock fall direction. 7. The impact buffering method according to claim 6 , wherein the impact buffer is arranged as a group of impact buffers that are bound in parallel with each other using a binding means.

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