JP5142082B2 - Protective fence - Google Patents

Description

  The present invention relates to a protective fence for falling rocks, landslides, and avalanches.

  Conventionally, this type of protective fence is a protective fence in which a protective net is stretched between struts erected at a predetermined interval, and an upright triangular net and an inverted triangular triangular net are combined continuously. The adjacent opposite sides of the triangular nets are connected via a coupler to form a belt-like protective net, one of the triangular net attachment ropes is connected to the upper part of the support, and the other end is the ground of the slope. Some are connected to an upper fixed point (anchor etc.) (for example, Patent Document 1 and Patent Document 2).

The attachment rope is an oblique rope member that connects the upper part of the support and the front of the support, and the protective fence provides energy to the entire protective fence stretched against the impact force and load acting locally. Can absorb and resist load.
JP 2002-322615 A JP 2003-3425 A

  In the above-mentioned protective fence, when falling rock impact force or snow pressure acts on the triangular net, an axial force is applied to the column and a bending moment is generated by the force in the direction intersecting this, and the magnitude of these is the surface of the triangular net. This corresponds to the combined force of the reaction force orthogonal to the tension and the tensile force received from the mounting rope.

  Therefore, if there is a structure that can reduce the force applied to such a column, the performance of the protective fence can be improved.

Therefore, an object of the present invention is to provide a protective fence that can reduce the force applied to a column or the like by increasing the amount of deformation when an impact force such as falling rock, landslide, or avalanche acts.

In the inventions of claims 2 and 4 , in the protective fence in which the struts are erected at intervals and the net is provided between the struts, the upper and lower rope members are provided between the struts, and the upper and lower rope members are A net is provided, and the net is connected to the upper and lower rope members by a shock absorber.

The invention according to claim 1 is a protective fence in which struts are erected at intervals and a net is provided between the struts. A vertical rope member is provided on the strut side, and the vertical rope member of the strut is provided. The mesh body is provided therebetween, and the mesh body is connected to the vertical rope member by a buffer.

According to a second aspect of the present invention, a vertical rope member is provided on the column side between the ends of the upper and lower rope members, and the mesh body is provided between the vertical rope members.

According to a fifth aspect of the present invention, a buffer is provided on the upper and lower rope members.

According to a third aspect of the present invention, a buffer is provided on the vertical rope member.

  According to a sixth aspect of the present invention, an outer frame rope member comprising the upper and lower rope members and a vertical rope member on the support column side is provided, the net body is provided in the outer frame rope member, and the net body is buffered. It is connected to the outer frame rope member by a tool.

According to a fourth aspect of the present invention, the upper and lower ends of the mesh body are connected to the support column by a shock absorber.

In the invention according to claim 7 , the mesh body is connected to the vertical rope member by a buffer.

According to an eighth aspect of the present invention, the shock absorber has a coil shape.

According to a ninth aspect of the present invention, when a force acts on the net body, the outer diameter of the shock absorber increases.

According to a tenth aspect of the present invention, when the force acts on the net body, the shock absorber extends.

According to the configuration of claims 2 and 4 , when an impact force such as falling rocks, landslides, and avalanches is received, the mesh body is deformed, and the upper and lower rope materials transmitted from the mesh body are deformed, and the shock absorber absorbs the impact force. In addition, since the net body is further deformed, the amount of deformation becomes large, the impact force can be absorbed efficiently, and the force applied to the column can be reduced.

In addition, according to the configuration of claim 1 , when an impact force such as falling rocks, landslides, and avalanches is applied, the mesh body is deformed, and the vertical rope material transmitted from the mesh body is deformed, and the impact force is absorbed by the shock absorber. In addition, since the net body is further deformed, the amount of deformation becomes large, the impact force can be absorbed efficiently, and the force applied to the column can be reduced.

In addition, according to the configuration of claim 2 , when an impact force such as falling rocks, landslides, and avalanches is applied, the mesh body is deformed, and the upper and lower rope materials and the vertical rope material to which the force is transmitted from the mesh body are deformed. Since the impact force is absorbed and the net body is further deformed, the amount of deformation becomes large, the impact force can be absorbed efficiently, and the force applied to the support column can be reduced.

Moreover, according to the structure of Claim 5 , the big impact force more than predetermined can be absorbed with the shock absorber of an upper and lower rope material.

Moreover, according to the structure of Claim 3 , a big impact force more than predetermined can be absorbed with the shock absorber of a vertical rope material.

  Further, according to the configuration of claim 6, when the impact force such as falling rocks, landslides and avalanches is received, the net body provided with the outer frame rope material is deformed, and the upper and lower rope materials and the vertical rope material from which the force is transmitted. Since the shock absorber is deformed and the impact force is absorbed by the shock absorber, the net body is further deformed, the amount of deformation is increased, the impact force can be absorbed efficiently, and the force applied to the column can be reduced.

According to the fourth aspect of the present invention, when an impact force such as falling rocks, landslides, or avalanches is received, the impact force can be absorbed by the shock absorber connecting the four sides of the net and the support.

Moreover, according to the structure of Claim 7 , when it receives impact force, such as a falling rock, a landslide, and an avalanche, an impact force can be absorbed with the buffer which connects a net | network body and a vertical rope material.

Moreover, according to the structure of Claim 8, an impact force can be absorbed by deformation | transformation of a coil-shaped shock absorber.

Moreover, according to the structure of Claim 9 , an impact force can be absorbed when a coil-shaped buffer is expanded.

Moreover, according to the structure of Claim 10 , an impact force can be absorbed when a coil-shaped buffer is extended.

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, by employing a new protective fence different from the conventional one, an unprecedented protective fence is obtained, and this protective fence will be described.

  Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. As shown in FIG. 1, the protective fence 1 includes a support column 2 standing on a slope 101 at a predetermined interval, a net body 3 provided between the support columns 2 and 2, and an upper and lower rope provided between the support columns 2 and 2. Material 4U, 4S and left and right vertical rope materials 5, 5 provided between the upper and lower rope members 4U, 4S on the support columns 2, 2, and in this example, upper and lower rope members 4U, 4S An outer frame rope member 6 is constituted by left and right vertical rope members 5, 5, the mesh body 3 is disposed in the outer frame rope member 6, and the upper and lower sides of the outer frame rope member 6 are connected to each other by the connecting portions 7. 2 and 2 are connected to the top and bottom.

  The net body 3 includes an outer edge rope member 11, a one side rope member 12 arranged in the outer edge rope member 11 and an other side rope member 13 in the other side direction, and the plurality of rope members 12. , 13 are arranged in an oblique direction, intersect each other, and the rope members 12, 13 are fixed by the cross fixture 16 at the intersection. The net 3 is provided with an auxiliary net 17 having a mesh smaller than that of the net 3. The outer edge rope material includes upper and lower edge rope materials 11U and 11S and left and right edge rope materials 11T and 11T. The edge rope members 11U, 11S, 11T, and 11T correspond to the upper rope member 4U, the lower rope member 4S, and the vertical rope members 5 and 5, respectively.

  The mesh body 3 is connected to the outer frame rope member 6 by a plurality of shock absorbers 14, and the coil member 15 is used as the shock absorber 14. The upper and lower rope members 4 U and 4 S of the outer frame rope member 6 and the left and right The vertical rope members 5 and 5 and the corresponding portion of the outer edge rope member 11 are inserted through and connected to a coil-shaped member 15 whose length direction is matched. As a specific locking method, the outer frame rope member 6 and the outer edge rope member 11 are overlapped, and one end portion 15S of the coil-shaped member 15 is placed outside the outer frame rope member 6 and the outer edge rope member 11. The entire length of the coil-shaped member 15 is wound around the outer frame rope member 6 and the outer edge rope member 11. The coiled member 15 can be made of a material having an elastic restoring force such as spring steel, or can be made of a material having a small elastic restoring force such as a synthetic resin. Energy can be absorbed until it breaks in the plastic deformation range. The upper and lower rope members 4U and 4S and the left and right vertical rope members 5 and 5 of the outer frame rope member 6 and the corresponding portion of the outer edge rope member 11 are connected by at least one shock absorber 14. Are connected by a shock absorber 14.

  In this case, if the impact force absorption amount due to the deformation of one coil-like member 15 is measured in advance, the impact force absorption amount can be easily set depending on the number and strength of the coil-like members 15 to be used. Moreover, the mesh body 3 can be easily attached by winding the coil-shaped member 15 around the outer frame rope material 6 and the outer edge rope material 11.

The netting 3 is rock falls and landslides, receives an impact force, such as avalanche, coiled member 15 is expanded deformation to absorb the impact force, the force applied from the coil-like member 15, the outer edge rope materials 11 Tension is generated. In this case, since the outer edge rope materials 11 both ends vertically is connected to the column 2, 2, the impact force is applied to the two points of top and bottom of the tower 2, the generation of bending moment in the strut 2 is suppressed .

  In this way, in this embodiment, the support rods 2 and 2 are erected at intervals, and the upper and lower rope members 4U are provided between the support columns 2 and 2 in the protective fence provided with the net body 3 between the support columns 2 and 2. 4S is provided, and the net body 3 is provided between the upper and lower rope members 4U and 4S, and the net body 3 is connected to the upper and lower rope members 4U and 4S by the shock absorbers 14, so that impact forces such as falling rocks, landslides, and avalanches are applied. When received, the mesh body 3 is deformed, and the upper and lower rope members 4U, 4S to which the force is transmitted from the mesh body 3 are deformed, and the shock absorber 14 absorbs the impact force. In this example, the shock absorber 14 is expanded in diameter. Since the net body 3 is further deformed, the amount of deformation is increased, and the impact force can be absorbed efficiently and the force applied to the support column 2 and the like can be reduced.

  In this way, in this embodiment, the columns 2 and 2 are erected at intervals, and the vertical rope member 5 is provided on the column 2 side in the protective fence provided with the net body 3 between the columns 2 and 2. Since the net body 3 is provided between the vertical rope members 5 and 5 of the support column 2 and the net body 3 is connected to the vertical rope member 5 by the shock absorber 14, it receives an impact force such as falling rocks, landslides, and avalanches. The net body 3 is deformed, the vertical rope material 5 to which the force is transmitted from the net body 3 is deformed, the shock force is absorbed by the shock absorber 14, and the net body 3 is further deformed. The force can be absorbed efficiently and the force applied to the column 2 can be reduced.

Further, in the present embodiment in this manner, the vertical rope materials 4U, the vertical rope material 5 provided on the post 2 side between the ends of the 4S, because providing the mesh member 3 between the vertical rope materials 5,5, rock falls and landslides When an impact force such as an avalanche is received, the mesh body 3 is deformed, and the upper and lower rope members 4U and 4S and the vertical rope members 5 and 5 to which the force is transmitted from the mesh body 3 are deformed, and the shock absorber 14 absorbs the impact force. At the same time, since the mesh body 3 is further deformed, the amount of deformation becomes large, the impact force can be absorbed efficiently, and the force applied to the column 2 and the like can be reduced.

  As described above, in this embodiment, the outer frame rope member 6 including the upper and lower rope members 4U and 4S and the vertical rope members 5 and 5 on the support column 2 side is provided. Since the net body 3 is provided at a distance from the rope material 6 and the net body 3 is connected to the outer frame rope material 6 by the shock absorber 14, the deformation amount of the net body 3 is large, and the impact force is efficiently absorbed. In addition, the force applied to the support column 2 can be reduced.

  Further, in this embodiment, since the net body 3 is connected to the vertical rope member 5 by the shock absorber 14, when the impact force such as falling rock, landslide, avalanche or the like is received, the net member 3 and the vertical rope member 5 are connected. An impact force can be absorbed by the buffer 14 to be connected.

  Further, in this embodiment, since the shock absorber 14 is the coil-shaped member 15 having a coil shape, the impact force can be absorbed by the deformation of the coil-shaped shock absorber 14.

  As described above, in this embodiment, when a force is applied to the mesh body 3, the outer diameter of the shock absorber 14 expands, so that the impact force can be absorbed by the coil member 15 expanding.

  Further, as an effect of the present embodiment, the amount of shock force absorbed by the entire shock absorber 14 can be easily set depending on the number of coil-shaped members 15, the mounting position, and the like. Further, by winding the coil-shaped member 15 around the outer frame rope material 6 and the outer edge rope material 11, the net body 3 can be easily attached or exchanged. Further, by connecting only the upper and lower portions of the net body 3 to the upper and lower portions of the support column 2, the occurrence of bending moment in the support column 2 can be further suppressed. Furthermore, by winding the coil-shaped member 15, the rope members arranged substantially in parallel can be easily connected.

3 to 4 show a second embodiment of the present invention. The same reference numerals are given to the same portions as those in the above-described embodiment, and detailed description thereof will be omitted. The coiled member 15 arranged in the crossing direction on the frame rope member 6 is used, and as a locking method, the coiled member 15 is rotated and wound around one of the outer frame rope member 6 and the outer edge rope member 11. Further, the coil-shaped member 15 is turned and wound around the other, and the end portion 15S is connected to the middle of the coil- shaped member 15 by the binding tool 19, whereby the outer frame rope material 6 and the outer edge rope material are coiled in the cross direction. The members 15 are connected.

  Thus, in this embodiment, the same operations and effects as those of the first embodiment are obtained.

  In this way, in this embodiment, when force is applied to the mesh body 3, the shock absorber 14A extends, and therefore, the impact force can be absorbed by the extension of the coil-shaped member 15 that is the coil-shaped shock absorber 14A.

Incidentally, in this Example 2 and Example 1 above, can be used dense coil spring-shaped coiled member 15 is a wire to each other in close contact.

  FIG. 5 shows a third embodiment of the present invention. The same reference numerals are given to the same portions as those in the above-described embodiment, and detailed description thereof will be omitted. In this example, a plurality of the shock absorbers 14 and 14A are provided. The shock absorbers 14 and 14A are alternately arranged.

  As described above, in this embodiment, the same operations and effects as those of the first embodiment are obtained. When the same coil-shaped member 15 is used, the shock absorber 14 and the shock absorber having a larger elastic deformation range than the shock absorber 14 are used. By combining the tool 14A, the impact force can be effectively absorbed.

  FIG. 6 shows a fourth embodiment of the present invention, where the same reference numerals are given to the same portions as the above-described embodiments, and detailed description thereof will be omitted. In this example, Alternatively, an intermediate strut 2A is provided between the struts 2 and 2 connecting the upper and lower rope members 4U and 4S or the vertical rope members 5 and 5, and the intermediate struts 2 and 2 are locked by the locking portions 18 and 18. The upper and lower rope members 4U and 4S are formed, and have the same operations and effects as the above embodiments. The number of struts 2A provided between the struts 2 and 2 provided with the vertical rope member 5 can be selected as appropriate, and the locking portion 18 allows the vertical rope members 4U and 4S to move in the left-right direction. Is preferred.

  7 to 9 show a fifth embodiment of the present invention. The same reference numerals are given to the same portions as those in the above-described embodiment, and detailed description thereof will be omitted. The upper and lower rope members 4U and 4S are disposed on the upper and lower rope members 4U and 4S, and the net body 3 is disposed between the upper and lower rope members 4U and 4S. Corresponding parts are connected. In this example, the upper rope member 4U and the outer edge rope member 11 are connected by two shock absorbers 20, and the lower rope member 4U and the outer edge rope member 11 are connected by two shock absorbers 20.

The shock absorber 20 is configured by two clamping bodies 21 and 21, a bolt 22 and a nut 23 for fastening, and the like. Connecting the base ends of the connecting rope members 24, 24 to the corresponding portions of the upper and lower rope members 4U, 4S and the outer edge rope member 11, respectively, and two grooves 25 for accommodating the distal ends of the connecting rope members 24, 24A, respectively. 25 is engraved in the holding bodies 21 and 21, and the holding bodies 21 and 21 are brought into contact with both sides of the connecting rope members 24 and 24 so that the connecting rope members 24 and 24 are accommodated in the grooves 25 and 25, respectively. The bolts 22 are inserted into the through holes 26 and 26 of the sandwiching bodies 21 and 21 and tightened with the nuts 23 to hold the connecting rope members 24 and 24. The clamping force (crimping force) of the connecting rope members 24, 24 can be adjusted by the tightening force of the bolt 22 and the nut 23. The two ropes 25 and 25 accommodate the connecting rope member 24 of the upper and lower rope members 4U and 4S and the connecting rope member 24 of the outer edge rope member 11, respectively, so that the connecting rope members 24 and 24 can slide sufficiently. The long portions 24A and 24A are protruded. The connecting rope members 24, 24 are gripped with a predetermined friction force by the bolt 22 and the nut 23, and when the tension more than the setting acts on the connecting rope members 24, 24, the extra length portions 24A, 24A are allowed to slide. Is. By providing the shock absorber 20 in this manner, the connecting rope members 24 and 24 slide with respect to the shock absorber 20, so that impact energy can be effectively absorbed.

  Further, the upper and lower ends of the net body 3 are connected by the shock absorbers 20 without using the vertical rope member 5. In this case, the connection rope members 24 are provided on the upper and lower ends of the outer edge rope member 11, and the connection rope members 24 are provided on the upper and lower portions of the support column 2, and the corresponding connection rope members 24, 24 are held by the sandwiching bodies 21, 21. .

  As described above, in this embodiment, the same operations and effects as the above-described embodiment are obtained.

  Further, in this example, instead of the vertical rope member 5, the upper and lower ends of the vertical edge rope members 11T and 11T of the net body 3 are connected to the support column 2 by using the shock absorber 20, so that the bending moment in the support column 2 can be reduced. Generation can be suppressed.

  FIG. 10 shows a sixth embodiment of the present invention. The same reference numerals are given to the same parts as those in the above-described embodiment, and detailed description thereof will be omitted. In this example, the mesh body 3 in the fifth embodiment is shown in FIG. The intermediate portions of the vertical edge rope members 11T, 11T are connected to the support column 2 using a plurality of shock absorbers 20, and the impact force is absorbed by the frictional sliding of the connection rope members 24, 24 in the shock absorbers 20. In addition, the net body 3 is deformed by an amount corresponding to the extra length portion 24A that has been slid by friction, and the impact force can be absorbed.

  As described above, in this embodiment, the same operations and effects as the above-described embodiment are obtained.

  FIG. 11 shows a seventh embodiment of the present invention. The same reference numerals are given to the same parts as those in the above-mentioned embodiment, and detailed description thereof will be omitted. In this example, it is provided between the columns 2 and 2. A net body 3 and upper and lower rope members 4U and 4S provided between the support columns 2 and 2 are provided.

  The net body 3 includes a horizontal rope member 32 in the horizontal direction and a vertical rope member 33 in the vertical direction. The plurality of rope members 32 and 33 intersect each other, and the rope members 32 and 33 are crossed at the intersections. The auxiliary mesh body 17 is overlaid on the net body 3.

  Further, the end portion 33T of the vertical rope member 33 positioned above and below the net body 3 is gripped by the sandwiching body 21 of the shock absorber 20 as a connection rope member, and connected to the upper and lower rope members 4U and 4S. 24 is gripped by the sandwiching body 21, and the end portions 32T of the lateral rope members 32 positioned on the left and right of the net body 3 are gripped by the sandwiching body 21 of the shock absorber 20 as connecting rope members, and the column 2 The connecting rope member 24 that is connected to or fixed to the column 2 side is held by the holding body 21.

  As described above, in this embodiment, the same operations and effects as the above-described embodiment are obtained.

  Further, by providing the shock absorbers 20 at both ends of the horizontal rope member 32 and the vertical rope member 33, the shock absorber 20 is provided twice as many as the horizontal rope member 32 and the vertical rope member 33, and the shock absorber 20 absorbs the shock. Can be absorbed, and the amount of deformation of the mesh body 3 can be increased by sliding the end portions 32T and 33T, and the shock absorbing effect is excellent.

  FIG. 12 shows an eighth embodiment of the present invention. The same reference numerals are given to the same parts as those in the above embodiment, and detailed description thereof will be omitted. In this example, the upper and lower ropes in the seventh embodiment. The ends of the materials 4U and 4S are connected to the pillars 2 and 2 or fixed to the pillars 2 and 2 side by a large shock absorber 20A. The large shock absorber 20A is formed larger than the shock absorber 20 in order to hold the upper and lower rope members 4U, 4S having a diameter larger than that of the connecting rope member 24, but the other configuration is the same as that of the shock absorber 20. .

  A connecting rope member 34 having the same diameter as the upper and lower rope members 4U and 4S is connected to the upper and lower sides of the support column 2, and the connecting rope member 34 and the end side of the upper and lower rope members 4U and 4S are sandwiched as shown in FIG. It grips with the body 21, provides an extra length part in the end part side of the connection rope material 34, and makes the end part side of the upper and lower rope materials 4U and 4S into an extra length part.

  The frictional force of the rope members 4U, 4S, 34 in the large shock absorber 20A is larger than that of the rope members 24, 32T, 33T in the shock absorber 20, and when the net body 3 receives an impact force such as falling rocks, the shock absorber first. In the large shock absorber 20A, the rope material does not frictionally slide unless tension is generated by a considerably large impact force. Therefore, the normal impact force is absorbed by the shock absorber 20, and the large shock absorber 20A acts on the unexpectedly large impact force such as a large collapse to absorb the impact force.

  As described above, in this embodiment, the same operations and effects as the above-described embodiment are obtained.

  As described above, in this embodiment, the upper and lower rope members 4U and 4S are provided between the support columns 2 and 2, and the large shock absorber 20A is provided in the middle of the upper and lower rope members 4U and 4S. Since the frictional force of the rope material connected to the upper and lower rope members 4U and 4S and gripped by the large shock absorber 20A is larger than the frictional force of the rope material gripped by the shock absorber 20, the shock absorber 20 around the net body 3 is usually used. The impact force such as falling rocks can be absorbed by the frictional sliding of the rope material, and the impact force can be absorbed by the frictional sliding of the rope material in the large-sized shock absorber 20 for a larger impact force.

  FIG. 13 shows a ninth embodiment of the present invention. The same reference numerals are given to the same parts as those in the above-described embodiment, and detailed description thereof will be omitted. This example is a modification of the first to fourth embodiments. In addition, a large shock absorber 20A is provided at a connection portion between the upper and lower rope members 4U, 4S and the support column 2, and a large shock absorber 20A is provided at a connection portion between the vertical rope member 5 and the support column 2. As shown in FIG. 9, connecting rope members 34 having the same diameter as the upper and lower rope members 4U and 4S are connected to the upper and lower connecting portions 7 and 7 of the adjacent struts 2 and 2, and as shown in FIG. And the end portions of the upper and lower rope members 4U, 4S are gripped by the holding body 21, an extra length portion is provided on the end portion side of the connecting rope member 34, and the end portions of the upper and lower rope members 4U, 4S are provided as extra length portions. And The connection rope member 34 constitutes a part of the upper and lower rope members 4U and 4S.

  In addition, a connecting rope member 35 having the same diameter as that of the vertical rope member 5 is connected to the upper and lower connectors 7 and 7 of the support column 2, and as shown in FIG. 9, the end portions of the connecting rope member 35 and the vertical rope member 5. Are held by the sandwiching body 21, an extra length portion is provided on the end side of the connecting rope member 35, and an end portion side of the vertical rope member 5 is an extra length portion. The connecting rope member 35 constitutes a part of the vertical rope member 5.

  Then, the upper and lower rope members 4U and 4S and the vertical rope members 5 and 5 and the outer edge rope members 11 corresponding thereto are connected by the plurality of shock absorbers 14.

  Even the one using the outer frame rope material in which the upper and lower rope members 4U, 4S and the vertical rope members 5, 5 are integrated as in the above embodiment, or the one separately connected to the support column 2 as in this embodiment. In addition, the connecting rope members 34, 34, 35, 35 and the large shock absorber 20 </ b> A may be used to couple to the support column 2.

  In this way, in this embodiment, the support rods 2 and 2 are erected at intervals, and the upper and lower rope members 4U are provided between the support columns 2 and 2 in the protective fence provided with the net body 3 between the support columns 2 and 2. 4S is provided, and the net body 3 is provided between the upper and lower rope members 4U and 4S, and the net body 3 is connected to the upper and lower rope members 4U and 4S by the buffering tool 14 so that the upper and lower rope members 4U and 4S have a large buffer. Since the tool 20A is provided, when it receives an impact force such as falling rocks, landslides, and avalanches, the mesh body 3 is deformed, and the upper and lower rope members 4U and 4S transmitted from the mesh body 3 are deformed. In this example, since the shock absorber 14 expands in diameter and the mesh body 3 is further deformed, the amount of deformation becomes large, the impact force can be absorbed efficiently, and the force applied to the support column 2 can be reduced. Furthermore, if the impact force exceeds a predetermined level, the shock absorber Vertical rope materials 4U, connected 4S rope materials 35 are frictionally slid at 0A, it can be absorbed impact force.

  In this way, in this embodiment, the columns 2 and 2 are erected at intervals, and the vertical rope member 5 is provided on the column 2 side in the protective fence provided with the net body 3 between the columns 2 and 2. Since the net body 3 is provided between the vertical rope members 5 and 5 of the support column 2 and the net body 3 is connected to the vertical rope member 5 by the shock absorber 14, it receives an impact force such as falling rocks, landslides, and avalanches. The net body 3 is deformed, the vertical rope material 5 to which the force is transmitted from the net body 3 is deformed, the shock force is absorbed by the shock absorber 14, and the net body 3 is further deformed. The force can be absorbed efficiently, the force applied to the support column 2 and the like can be reduced. Further, when an impact force exceeding a predetermined value is received, the vertical rope member 5 and the connecting rope member 35 are frictionally slid in the shock absorber 20A. Can absorb power.

FIG. 14 shows an embodiment 10 of the present invention. The same reference numerals are given to the same parts as those in the above embodiment, and detailed description thereof will be omitted. This embodiment includes shock absorbers 20 and 20A. a modification of the embodiment, the end of the rope member 24, and provided with a stopper 39 for locking the Kyojitai 21, rope materials 2 4 is frictionally slid to absorb the impact force, the stopper 3 9 after locked to Kyojitai 21, rope materials 2 4 without sliding, against the impact force due to the tension.

Further, the stopper 3 9, the rope materials 4U gripped by holding member 21 in the embodiment described above, 4S, can be provided on the end of 5,24,32,33,34,35. Therefore, as an example, in Example 9 and the like, the upper and lower rope members 4U and 4S and the vertical rope member 5 slide relative to the sandwiching body 21 after the stopper 39 is locked to the sandwiching body 21 of the shock absorber 20. Become.

  In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible. For example, in the embodiment, the shock absorber provided with the coil-shaped shock absorber and the sandwiching body is illustrated, but various shock absorbers can be used. Moreover, various rope materials, such as a wire rope and a synthetic resin rope, can be used for each rope material of this invention.

It is a front view of the protection fence which shows Example 1 of this invention. It is explanatory drawing of the buffer which consists of a coil-shaped member same as the above. It is a front view of the protection fence which shows Example 2 of this invention. It is explanatory drawing of the buffer which consists of a coil-shaped member same as the above. It is a front view of the protection fence which shows Example 3 of this invention. It is a front view of the protection fence which shows Example 4 of this invention. It is a front view of the protection fence which shows Example 5 of this invention. It is a front view of the principal part of a protection fence same as the above. It is sectional drawing of a shock absorber same as the above. It is a front view of the protection fence which shows Example 6 of this invention. It is a front view of the protection fence which shows Example 7 of this invention. It is a front view of the protection fence which shows Example 8 of this invention. It is a front view of the principal part of the guard fence which shows Example 9 of this invention. It is a front view of the principal part of the guard fence which shows Example 10 of this invention.

DESCRIPTION OF SYMBOLS 1 Guard fence 2 Support | pillar 3 Net body 4U Upper rope material 4S Lower rope material 5 Vertical rope material 6 Outer frame rope materials 14 and 14A Buffer 15 Coiled member 20 Buffer 34 Connection rope material (It constitutes a part of upper and lower rope materials )
35 Connection rope material (part of vertical rope material)

Claims (10)

In the protective fence in which the struts are erected at intervals and the net is provided between these struts, the vertical rope material is provided on the post side, the net is provided between the vertical rope members of the struts, A protective fence characterized in that the mesh body is connected to the vertical rope member by a shock absorber. In the protective fence in which the pillars are erected at intervals and the net is provided between the pillars, the upper and lower rope members are provided between the pillars, and the net is provided between the upper and lower rope members. Is connected to the upper and lower rope members by a shock absorber ,
The protective fence according to claim 1 , wherein a vertical rope member is provided on the column side between ends of the upper and lower rope members, and the net body is provided between the vertical rope members . In the protective fence in which the struts are erected at intervals and the net is provided between these struts, the vertical rope material is provided on the post side, the net is provided between the vertical rope members of the struts, The net body is connected to the vertical rope member by a buffer ,
A protective fence provided with a shock absorber on the vertical rope member . In the protective fence in which the pillars are erected at intervals and the net is provided between the pillars, the upper and lower rope members are provided between the pillars, and the net is provided between the upper and lower rope members. Is connected to the upper and lower rope members by a shock absorber ,
The protective fence characterized by connecting the upper-lower-end part side of the said net | network body to the said support | pillar with a buffer, respectively . The protective fence according to claim 2, wherein a buffer is provided on the upper and lower rope members. An outer frame rope material composed of the upper and lower rope materials and the vertical rope material on the support column is provided, and the net body is provided in the outer frame rope material, and the net body is connected to the outer frame rope material by a shock absorber. The protective fence according to claim 2, wherein The protective fence according to claim 2, wherein the mesh body is connected to the vertical rope member by a shock absorber. The protective fence according to any one of claims 1 to 6 , wherein the shock absorber has a coil shape. The protective fence according to claim 8 , wherein when a force acts on the net body, the outer diameter of the shock absorber increases. The protective fence according to claim 8 , wherein when the force acts on the net body, the shock absorber extends.

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