JP4053058B2 - Impact absorber and its impact energy absorption setting method - Google Patents

Description

  The present invention relates to an impact absorber such as an avalanche, rock fall, and the like and an impact energy absorption amount setting method thereof.

  Conventionally, as this kind of support, pillars are provided at predetermined intervals, and a horizontal rope member is moored in a state that allows horizontal sliding between the pillars. Shielded with a wire net that is hooked to the rope material, and a surplus length part formed by polymerizing the horizontal rope material in the middle of each horizontal rope material, and a clamping tool that clamps the surplus length part with a constant force A shock absorber is provided that absorbs the tension when the horizontal rope member is subjected to a tension of a predetermined tension or more, while the horizontal rope member retains a certain frictional force and the extra length is extended (for example, Patent Document 1). If there is an absorbing fence and the impact force acting on the mesh surface of the shock absorbing fence exceeds the set frictional resistance of the buffering part, the buffering part formed in the middle of the horizontal rope material cannot withstand, and the rope material and the holding tool Even if it starts sliding between sliding and receives a large impact force It is possible to effectively absorb the energy by the diameter of flops.

  Further, in Patent Document 1, an overlapping portion in which a plurality of wires are overlapped by forming a support wire connecting the avalanche / falling rock prevention body and the ground is formed in a loop shape, and the overlapping portions are provided at a plurality of intervals. There are some which are fastened by the tightened member, the both ends of the loop-shaped portion are locked to the tightening member, and the tightening member is moved by the tensile force applied to the supporting wire.

  Further, the other end portions of the guard rope are overlapped with each other to form an overlapping portion, and the overlapping portion is fastened by a fastening member provided at a plurality of intervals, and a terminal protrusion that can be locked to the fastening member. A portion is provided at the end portion of the other end portion of the guard rope, and the other end portions of the overlapping portion are frictionally slid by a tensile force applied to the guard rope (for example, Patent Document 2).

  Furthermore, a brake device for absorbing impact energy reaching the holding rope is provided in the middle of the holding rope stretched between the struts. The holding rope passes through the loop pipe and extends from the pipe port at the other end (for example, Patent Document 3), and the friction of the loop pipe overlapping part at the tightening part and Energy is absorbed by friction between the loop tube and the tightening member.

  As described above, the impact absorbing energy is absorbed by the frictional force in the above three-part shock absorbing fences and the like.

  On the other hand, in Patent Document 3, the mesh body is configured by connecting a large number of ring members to each other so that the inner peripheral sides of adjacent ring members are in contact with each other. If the member is pulled outward at an engagement point with another ring member, for example, if the engagement point is four places on the entire circumference, the ring member is deformed into a rectangle, and the force for deforming the ring member in this way is obtained. It becomes impact absorption energy, and it can be made to respond | correspond easily with the magnitude | size of the energy which should be absorbed by selecting suitably the material of a ring member, the thickness of a steel wire, and the diameter of a ring member.

Furthermore, there is a protective device (for example, Patent Document 4) using a compression coil spring for absorbing shock, and one end of a horizontal rope member is connected to a fixed part such as a support by a compression spring device, and the compression spring device includes a compression coil spring. The presser plates, which are the presser parts, are arranged on both sides of the lengthwise direction, and a moving rod is inserted into the holes of the presser plates and the compression coil springs. Is generated, the movable rod is pulled and the presser plate moves toward the presser plate, the compression coil spring is compressed, and the impact energy is absorbed.
Japanese Patent Publication No. 7-18134 Japanese Patent No. 2503929 JP-A-10-88527 JP 2004-332278 A

  And in the prior art of the said patent documents 1-3, it absorbs impact energy by the structure which absorbs impact energy with the said friction force, and the deformation | transformation of the said ring member, All have a limit in impact absorption capability.

  In Patent Document 4, the amount of shock energy absorbed can be set and adjusted by setting the strength of the compression coil spring, but a high performance compression coil spring is required to absorb a large impact. The cost of the spring itself is expected to increase.

  Therefore, the present invention aims to provide an impact absorber that can absorb a large impact energy with a relatively simple configuration, and in addition, an impact absorber that can efficiently absorb the impact energy. The purpose is to provide.

  The invention according to claim 1 is a shock absorber provided with a wire rod to which a tensile force is applied by an impact force such as an avalanche or falling rock in a protective body, and a loading member having a loading surface on an end portion of the wire rod or a member connected to the end portion In addition, a load surface is provided on the protective body, and a ring material is interposed between the load surfaces.

  The invention according to claim 2 is a shock absorber in which a plurality of support columns are provided at predetermined intervals and a horizontal wire is provided between the support columns, and is loaded on an end of the horizontal wire or a member connected to the end. A loading member having a surface is provided, a loading surface is provided on the support column, and a ring material is interposed between the loading surfaces.

  According to a third aspect of the present invention, there is provided an impact absorber in which a plurality of support pillars are provided at predetermined intervals, and a protection body in which the support pillars are shielded by a protection surface is provided, and the protection body and a ground are connected by a wire. In addition to providing a loading member having a loading surface on the end portion or a member connected to the end portion, a loading surface is provided on the protective body, and a ring material is disposed between the loading surfaces.

  According to a fourth aspect of the invention, the ring material is made of steel.

Moreover, invention of Claims 1-3 crushes the said ring material between the said both loading surfaces with the tension | tensile_strength applied to the said wire, The width | variety of the said load surface in the diameter direction of the said ring material is the said crushed ring material It is narrower than the interval between the curved protrusions generated on both sides in the width direction.

According to a fifth aspect of the present invention, the wire has a tensile strength that does not break even if the ring material is crushed until the opposing inner surfaces come into contact with each other.

The invention according to claim 6 is the impact energy absorption amount setting method of the impact absorber according to claim 1, wherein the thickness of the ring material or the diameter of the ring material and the diameter of the ring material on the load surface described above. This is a method of adjusting the amount of impact energy absorbed by deformation of the ring material by adjusting the width in the direction.

The invention of claim 7 is a method in which the wire has a tensile strength that does not break even if the ring material is crushed until the opposing inner surfaces abut.

  According to the first aspect of the present invention, when a tensile force is applied to the wire due to an impact force such as an avalanche or falling rock, the space between both loading surfaces is narrowed, the ring material is crushed, and the impact energy is absorbed by the deformation of the ring material. Is done.

  Further, according to the configuration of claim 2, when a tensile force is applied to the horizontal wire due to an impact force such as an avalanche or falling rock, the space between both loading surfaces is narrowed, the ring material is crushed, and the deformation of the ring material As a result, the impact energy is absorbed.

  Moreover, according to the structure of Claim 3, when tensile force is added to the wire which connects a protection body and a natural ground by impact forces, such as an avalanche and falling rock, the space between both loading surfaces will narrow and a ring material will be crushed. The impact energy is absorbed by the deformation of the ring material.

  Moreover, according to the structure of Claim 4, a member becomes simple and comparatively cheap.

According to the configuration of claims 1 to 3 , since the width of the loading surface is narrower than the interval between the curved protrusions generated on both sides in the width direction of the crushed ring material, Until the wire breaks due to an increase in tensile force, the range of deformation of the ring material is increased while the force applied to the ring material rises substantially constant or gently. The absorption amount of impact energy corresponding to the product of the force applied to the ring material and the deformation amount of the ring material can be greatly increased.

Moreover, according to the structure of Claim 5 , an impact energy can be absorbed until a ring material is crushed in substantially infinity shape.

According to the sixth aspect of the present invention, the amount of impact energy absorbed by the deformation of the ring material can be arbitrarily set by changing the deformation condition of the ring material by adjusting the width of the loading surface.

Moreover, according to the structure of Claim 7 , impact energy can be absorbed until a ring material is crushed.

  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 adopting a novel shock absorber different from the conventional one and its shock energy absorption amount setting method, an unprecedented shock absorber and its shock energy absorption amount setting method can be obtained. And its impact energy absorption setting method.

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 16 show a first embodiment of the present invention. As shown in FIG. 1, a rock fall protection fence that is an impact absorber is provided with a concrete foundation 1 side by side along a slope S or a slope S. A plurality of columns 2... 2T are erected. Note that 2T is a support column of the terminal. The struts 2 and 2T are made of H-shaped steel, concrete columns, steel pipes, concrete-filled steel pipes or the like. In this example, steel pipes or H-shaped steels are used, and the lower ends thereof are fixed to the concrete foundation 1. The horizontal rope materials 3,3 serving horizontal direction of the wire is between the tower 2 is provided on the upper and lower engaging portion 4 are found provided on the tower 2 for engaging the horizontal rope materials 3.

  As shown in FIGS. 1 to 2, the end 3T of the horizontal rope member 3 is connected to the column 2T of the terminal by an impact absorbing device 11, and the column 2T of the terminal includes the web 5 and both flanges 6. , 6 and H-shaped steel. The impact absorbing device 11 includes a ring member 12 made of a steel pipe and the like, loading plates 13 and 13 as loading members arranged so as to sandwich the ring member 12 from both outer peripheral sides, the loading plate 13, the ring member 12 and the loading member. The end 3T inserted through the plate 13 and a terminal fixing tool 14 provided at the end 3T are provided. The locking portion 4 is constituted by a locking hook for locking the horizontal rope material 3.

  In this example, the portion to which the impact absorbing device 11 is attached is the web portion 5, a through hole 5 K is formed in the web portion 5, and the through holes 13 K and 13 K are provided at substantially the center positions of the load plates 13 and 13. In addition, through-holes 12K and 12K are formed in the ring material 12 at positions opposed to each other in the circumferential direction. In this example, the web portion 5 of the column 2T is the mounting position, and the end portion 3T is inserted through the through holes 5K, 13K, 12K, 12K, and 13K in this order, and the inserted end portion 3T is inserted into the end portion 3T. Fixing is performed by the terminal fixing tool 14. The terminal fixing tool 14 is a known one that is fixed to the terminal 3T by a wedge action or the like. The surfaces of the load plates 13 and 13 that are in contact with the outer periphery of the ring material 12 are the loading surfaces 13M and 13M. Although not shown, the horizontal rope member 3 may be similarly provided with an impact absorbing device 11 at the end on the other end side of the end 3T, and the other end 2 may be connected to the other end 2T. , 2T may be fixed.

  A net 7 serving as a protective surface that shields the space 2... 2T is provided between the struts 2... 2 T. The net 7 is hooked on the horizontal rope member 3, and the net 7 and the strut 2. ... 2T constitutes an impact absorbing fence 8 as a protective body.

  The load surface 13M described above has a width that is substantially the same as or larger than the width in the length direction of the ring material 12, while the width W in the diameter direction of the ring material 12 is the same as that of the ring material 12. It is smaller than the diameter D dimension, and preferably smaller than the distance K dimension between the curved protrusions 12D and 12D of the ring material 12 crushed until the opposing inner surfaces come into contact, as will be described later.

  An experiment relating to the configuration of the loading surface M will be described below.

  As shown in FIG. 4, a loading device 101 is used as an experimental device. This loading device 101 is provided with a measuring device 103 for measuring a load on the fixed plate 102 side, a lifting unit 105 that moves the movable plate 104 up and down, and a fixed device. A laser displacement meter 106 that measures the amount of displacement between the plate 102 and the movable plate 104, and a steel pipe ring 111 corresponding to a ring material is set up in the diameter direction between the fixed plate 102 and the movable plate 104. The movable plate 104 was lowered, and the load applied to the steel pipe ring 111 and the deformation amount of the steel pipe ring 111 were measured.

  As shown in FIG. 5, the steel pipe ring 111 is a carbon steel pipe for machine structure (STKM13A), has a nominal diameter of 175, an outer diameter φ of 190.7 mm, a thickness t of 12 mm, and a length L of 150 mm. In addition, the steel pipe ring 111 has a width PL in the diameter direction of both plates 102 and 104 of 200 mm, 100 mm, and 75 mm, respectively, and the applied load P (kN) and the displacement δ (mm) of the steel pipe ring 111 at that time The relationship was measured and shown in the graphs of FIGS. The widths of the plates 102 and 104 correspond to the width of the loading surface.

  In order to match the actual use conditions, the steel pipe ring 111 was subjected to an experiment using one having no through holes 111K and 111K corresponding to the through hole 13K and one having the through holes 111K and 111K. The presence / absence of the through hole 111K is shown in the graph as graph lines of “having hole” and “having no hole”. Further, in the graph, as an example of the breaking strength of the wire, a mark is given at a position where the load P = 157.0 kN.

  FIG. 12 shows, in FIG. 6, the amount of absorbed energy E absorbed by deformation of the steel pipe ring 111 up to the strength at which the wire breaks, and the wire breaks when the tensile load is 157.0 kN. At this time, the deformation δ of the steel pipe ring 111 is 87.54 mm, and the absorbed energy E is 10.0 kJ. However, since the steel pipe ring 111 is deformed from the deformation amount δ of 87.54 mm, a loss occurs in shock absorption due to the deformation of the steel pipe ring 111. Therefore, as shown in the “thin wall” in the same figure, if the thickness t of the steel pipe ring 111 is made thinner than 12 mm, the deformation amount δ until the wire breaks is approximately 140 mm, but the “thin wall” graph Since the line has a gradient, the area between the graph line and the horizontal line with the load P = 157.0 kN at which the wire breaks is lost. Further, if the load P at which the wire breaks is increased to 300.0 kN, the absorbed energy E becomes larger than 10.0 kJ, but the area between the solid graph line and the horizontal line with the load P = 300.0 kN is energy absorption. It turns out that it is a loss from the top, the tensile strength of the wire is greatly increased, and the cost is increased, but the effect is small.

  On the other hand, FIG. 13 shows the amount of absorbed energy E absorbed by deformation of the steel pipe ring 111 up to the strength at which the wire breaks in FIG. 11, and the tensile load is the same as in FIG. Since the wire breaks at 157.0 kN, the deformation δ of the steel pipe ring 111 at this time is 143.89 mm, the absorbed energy E is 18.3 kJ, and the load P increases as the deformation δ increases compared to the case of FIG. It can be seen that the increase in the resistance is moderate or substantially constant, and the shock absorption due to deformation of the steel pipe ring 111 is excellent.

  Next, deformation of the steel pipe ring 111 due to the difference in the width PL of the plates 102 and 104 will be described with reference to FIGS. 14 to 16 show a state in which the steel pipe ring 111 is crushed from (A) to (C). FIG. 14 shows the deformation of the steel pipe ring 111 when the width PL is 200 mm. From the circular state, as shown in FIG. 14 (A), the steel pipe ring 111 is recessed at the center position of the plates 102 and 104, Curved protrusions 12D and 12D are generated on both sides of the recess. When the steel pipe ring 111 is further crushed as shown in FIGS. 14B and 14C, the load P increases with respect to the deformation amount δ, and the graph shown in FIG. 7 is obtained. On the other hand, as shown in FIG. 15, when the width PL is 75 mm, a recess is generated in the steel pipe ring 111 at the center position of the plates 102 and 104 from the circular state, as shown in FIG. Curved projections 12D and 12D are generated on both sides, but the plates 102 and 104 do not push the maximum projecting portions of the curved projections 12D and 12D, and the curved projections as shown in FIGS. Since the steel pipe ring 111 is pushed between 12D and 12D, even if the deformation amount δ increases, the increase in the load P is moderate or almost constant, and the force is almost uniform until the opposing inner surfaces of the steel pipe ring 111 abut. Can be transformed. Further, as shown in FIG. 16, when the width PL is 100 mm, the steel pipe ring 111 is deformed in substantially the same manner as in FIG.

  In this way, by setting the size and thickness of the ring material 12 to be used, the width W of the ring material 12 in the diameter direction of the loading surface 13M, the tensile strength of the horizontal rope material 3 as a wire, and the like, It has been found that the absorption energy due to the deformation of the material 12 can be set to be maximum. Incidentally, supplementary explanation will be given with reference to FIG. 13. The absorbed energy is preferably 50% or more with respect to the energy corresponding to the product of the load P = 157.0 kN corresponding to the breaking strength of the wire and the inner diameter of the ring material 12. Is 60% or more. The inner diameter of the ring material 12 is the maximum amount of displacement of the ring material 12.

  When an impact force is applied to the net body 7 due to falling rocks or the like, a tensile force is generated in the horizontal rope material 3, the terminal fixing tool 14 moves to the support 2T side, and the ring material 12 is crushed by the loading surfaces 13M and 13M. Thus, the impact energy is absorbed, and after the ring material 12 is crushed until the opposing inner surfaces come into contact, the horizontal rope material 2 is stretched and broken to absorb the impact energy.

  Thus, in the present embodiment, corresponding to claim 1, in the shock absorber provided in the shock absorbing fence 8 serving as the protective body, the horizontal rope material 3 which is a wire rod to which tensile force is applied by the impact force such as avalanche and falling rock, A loading plate 13 which is a loading member having a loading surface 13M is provided at the end 3T of the horizontal rope member 3, and a loading surface 13M is provided on the support 2T of the shock absorbing fence 8, and a ring material 12 is provided between these loading surfaces 13M and 13M. Because of the impact of avalanches, falling rocks, etc., when a tensile force is applied to the horizontal rope member 3, the space between the loading surfaces 13M and 13M is narrowed and the ring member 12 is crushed. Impact energy can be absorbed by deformation.

  In this way, in this embodiment, corresponding to claim 2, a plurality of struts 2 ... 2T are provided at predetermined intervals, and a shock absorber having a horizontal rope member 3 as a horizontal wire between the struts 2 ... 2T. 1, a loading plate 13 as a loading member having a loading surface 13M is provided at the end 3T of the horizontal rope member 3, and a loading surface 13M is provided at the support 2T, and the ring material 12 is sandwiched between the loading surfaces 13M and 13M. Because of the arrangement, when a tensile force is applied to the horizontal rope member 3 due to the impact force of avalanches, falling rocks, etc., the space between both loading surfaces 13M, 13M is narrowed, the ring member 12 is crushed, and the deformation of the ring member 13 causes an impact. It can absorb energy.

  In this way, in this embodiment, the ring member 12 is made of steel in correspondence with the fourth aspect, so that the member is simple and relatively inexpensive.

Further, as an effect of the embodiment , the ring material 12 is crushed between the loading surfaces 13M and 13M by the tension applied to the horizontal rope material 3 which is a wire, and the width W in the diameter direction of the ring material 12 of at least one loading surface 13M. Is narrower than the diameter D of the ring material 12, when the ring material 12 is crushed by the tensile force of the horizontal rope material 3, the ring material 12 is deformed into an approximately ∞ shape in which the inner surfaces facing each other come into contact with each other. Since the width W of 13M is narrower than the diameter D of the ring member 12, the loading surface 13M does not crush the substantially infinite curved protrusions 12D and 12D. And after deform | transforming into a substantially infinity shape, in order to crush the curved protrusion part 12D, 12D, big force is required, Therefore, the tensile force of the horizontal rope material 3 increases, and the horizontal rope material 3 breaks at an early stage. However, since the width W of the loading surface 13 is narrower than the diameter D of the ring material 12, the horizontal rope material 3 can be prevented from breaking early, and the impact energy absorption effect is excellent.

In this way, in this embodiment, corresponding to claims 1 to 3 , the ring material 12 is crushed between the loading surfaces 13M and 13M by the tension applied to the horizontal rope material 3 as the wire, and the diameter of the ring material 12 is reduced. Since the width W of the loading surface 13M in the direction is narrower than the distance K between the curved protrusions 12D, 12D generated on both sides of the crushed ring material 12, the ring material 12 has a substantially infinite shape where the opposing inner surfaces abut. As a result, until the horizontal rope member 3 breaks due to an increase in tensile force, the range of deformation of the ring member 12 increases while the force applied to the ring member 12 rises substantially constant or gently. As a result, the amount of absorption of impact energy corresponding to the product of the force applied to the ring material 12 and the deformation amount of the ring material 12 can be significantly increased.

In this way, in this embodiment, in correspondence with claim 5 , the horizontal rope member 3 as a wire rod has a tensile strength that does not break even if the ring member 12 is crushed until the opposing inner surface comes into contact. Impact energy can be absorbed until 12 is crushed to approximately ∞.

As described above, in this embodiment, corresponding to claim 6 , the impact energy absorption amount setting method of the impact absorber according to claim 1, wherein the diameter D of the ring material 12 and the diameter direction of the ring material 12 are set. Since the impact energy absorption amount due to deformation of the ring material 12 is adjusted by adjusting the width W of the loading surface 13M, the deformation condition of the ring material 12 is changed by adjusting the width W of the loading surface 13, etc. The amount of impact energy absorbed by deformation of the ring material 12 can be arbitrarily set.

In this way, in this embodiment, in correspondence with claim 7 , the horizontal rope member 3 as a wire rod is set to have a tensile strength that does not break even if the ring member 12 is crushed until the opposing inner surface comes into contact. Therefore, the impact energy can be absorbed until the ring material 12 is crushed.

  FIG. 17 shows a second embodiment of the present invention, where the same reference numerals are given to the same portions as those of the first embodiment, and detailed description thereof is omitted. In this example, the upper portions of the support columns 2 and 2T, The slope S of the natural mountain that is in front of the shock absorbing fence 8 is connected by a cable rope 21 that is a wire rod, and the front end of the cable rope 21 is fixed to the slope S by an anchor member 22, and the cable rope The rear end 21T of the material 21 is connected to the upper part of the support columns 2 and 2T by the shock absorbing device 11.

  In the shock absorbing device 11 of this example, a through hole 23 penetrating the pillars 2 and 2T in the front-rear direction is formed, and a loading plate 13A is disposed on the rear side of the pillars 2 and 2T. The loading surface of the loading plate 13A 13M forms a cross direction with the length direction of the retaining rope member 21, and the through hole 13K and the through hole 23 formed in the loading plate 13A are formed in the longitudinal direction of the retaining rope member 21, that is, obliquely. Is formed.

  Then, the end 21T is inserted through the through holes 23, 13K, 12K, 12K, and 13K in this order from the front side of the support columns 2 and 2T, and the inserted end 21T is fixed by the terminal fixing tool 14. A shock absorbing device 11 is formed.

  Therefore, when an impact force is applied to the net body 7 and the support pillars 2 and 2T due to falling rocks, and the support pillars 2 and 2T are tilted backward, a tensile force is generated in the holding rope material 21, and the terminal fixing tool 14 is relatively attached to the support pole 2 , 2 so that the ring material 12 is crushed by the loading surfaces 13M and 13M, absorbing the impact energy, and after the ring material 12 is crushed until the opposing inner surface comes into contact, the rope The impact energy is absorbed when the material 21 stretches and breaks.

  Thus, in the present embodiment, corresponding to claim 3, a plurality of support columns 2 ... 2T are provided at predetermined intervals, and the shock absorbing fence as a protection body is shielded between the support posts 2 ... 2T by the net body 7 as a protection surface. 8 is provided with a loading plate 13 which is a loading member having a loading surface 13M at an end 21T of the holding rope material 21 in the shock absorber which connects the shock absorbing fence 8 and the ground with a holding rope material 21 which is a wire rod. Since the loading surface 13M is provided on the shock absorbing fence and the ring material 12 is sandwiched between the loading surfaces 13M and 13M, the shock absorbing fence 8 and the ground are connected by an impact force such as avalanche or falling rock. When tensile force is applied to the tie rope material 21, the space between both loading surfaces 13M and 13M becomes narrow, the ring material 12 is crushed, and the impact energy can be absorbed by the deformation of the ring material 12. In this example, the wire material Is the rope material 21 and has the same functions and effects as in Example 1 above. Unlikely to.

FIG. 18 shows a reference example of the present invention. The same reference numerals are assigned to the same parts as those of the above-described embodiments, and detailed description thereof is omitted. In this example, a loading plate is provided on the column 2T side. In addition, a flat loading surface is constituted by the outer surface 5G of the web portion 5 of the support column 2T, and thus the width W of at least one loading surface 13M and the outer surface 5G is narrower than the diameter D of the ring member 12, The same operations and effects as the above-described embodiments are achieved.

FIG. 19 shows a third embodiment of the present invention. The same reference numerals are given to the same portions as those of the above-mentioned embodiments, and detailed description thereof will be omitted. In this example, the end portion 3T of the horizontal rope member 3 is shown. Further, the cable end fitting 31 as a member is connected, and the end 32T of the steel rod 32 at the end of the cable end fitting 31 is connected to the column 2T of the terminal by the shock absorbing device 11. Note that a male screw portion is provided at the end portion 32T, and fixing is performed by screwing double nuts 33, 33 into the male screw portion.

  As described above, in this embodiment, the loading plate 13 which is the loading member having the loading surface 13M is provided on the rope end fitting 21 which is a member connected to the end 3T of the horizontal rope material 3 which is the wire rod. Thus, the same operations and effects as the above-described embodiments are achieved.

  In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible. For example, the loading surface is not limited to a flat surface and may be curved or uneven. In addition, as shown in FIG. 20, the locking portion 4 may be constituted by a hole formed in the web portion 5.

It is sectional drawing around the shock-absorbing device which shows Example 1 of this invention. It is the whole front view which made a part the cross section same as the above. It is drawing of a support | pillar same as the above, FIG. 3 (A) is a plane sectional view, FIG.3 (B) is a longitudinal cross-sectional view. It is a front view of a loading apparatus same as the above. It is a perspective view of a steel pipe ring same as the above. It is a graph showing the relationship between the load and the deformation when there is no hole and the width of the loading surface is 200 mm. FIG. 5 is a graph showing the relationship between the load and the deformation amount when there is a hole and the width of the loading surface is 200 mm. It is a graph showing the relationship between the load and deformation when there is no hole and the width of the loading surface is 100 mm. FIG. 6 is a graph showing the relationship between the load and the deformation when there is a hole and the width of the loading surface is 100 mm. It is a graph showing the relationship between the load and deformation when there is no hole and the width of the loading surface is 75 mm. FIG. 6 is a graph showing the relationship between the load and the amount of deformation when there is a hole and the width of the loading surface is 75 mm. FIG. 6 is a graph showing the relationship between the load and the deformation amount when there is a hole and the width of the loading surface is 200 mm, and the amount of absorbed energy E is indicated by hatching. FIG. 5 is a graph showing the relationship between the load and the deformation amount when there is a hole and the width of the loading surface is 75 mm, and the amount of absorbed energy E is indicated by hatching. It is explanatory drawing which shows a deformation | transformation of the steel pipe ring in case the width of a loading surface is 200 mm same as the above. It is explanatory drawing which shows a deformation | transformation of the steel pipe ring in case the width of a loading surface is 75 mm same as the above. It is explanatory drawing which shows a deformation | transformation of the steel pipe ring in case the width of a loading surface is 100 mm same as the above. It is a side view which shows Example 2 of this invention. It is sectional drawing around the impact-absorbing device which shows the reference example of this invention. It is sectional drawing around the shock-absorbing device showing Example 3 of the present invention. It is a plane sectional view of the support | pillar which shows the modification of a latching | locking part.

Explanation of symbols

1 concrete foundation 2 support 2T terminal support 3 horizontal rope material (horizontal wire)
3T End 5G Loading surface 7 Net (protective surface)
8 Shock absorbing fence (protector)
11 Shock absorber
12 Ring material
13 Loading plate (loading member)
13M Loading surface
21 Reservoir rope (wire)
21T end
31 Cable end bracket (member connected to the end)
W Diameter width D Diameter K Spacing

Claims (7)

In the shock absorber provided with a wire rod to which a tensile force is applied by an impact force such as an avalanche or rock fall, a load member having a load surface is provided on an end portion of the wire rod or a member connected to the end portion, and the protector body Provided with a loading surface, a ring material is sandwiched between the both loading surfaces, the ring material is crushed between the both loading surfaces by the tension applied to the wire material, and the loading surface in the diametrical direction of the ring material is The shock absorber is characterized in that the width is narrower than the interval between the curved protrusions generated on both sides in the width direction of the crushed ring material . In the shock absorber in which a plurality of columns are provided at predetermined intervals and a horizontal wire is provided between the columns, a loading member having a loading surface is provided on an end of the horizontal wire or a member connected to the end. In addition, the support surface is provided with a loading surface, a ring material is interposed between the both loading surfaces, and the ring material is crushed between the loading surfaces by the tension applied to the wire material, in the diameter direction of the ring material The shock absorber according to claim 1, wherein a width of the load surface is narrower than an interval between the curved protrusions generated on both sides in the width direction of the crushed ring material . A shock absorber provided with a plurality of support posts at predetermined intervals, shielded between the support posts by a protective surface, and connected to the protector and the ground with a wire rod. A loading member having a loading surface is provided on the connected member, a loading surface is provided on the protective body, a ring material is disposed between the both loading surfaces, and a tension applied to the wire rod causes a gap between the loading surfaces. The shock absorber according to claim 1, wherein the ring material is crushed, and the width of the load surface in the diameter direction of the ring material is narrower than the interval between the curved protrusions generated on both sides in the width direction of the crushed ring material . The impact absorber according to any one of claims 1 to 3, wherein the ring material is made of steel. The impact absorber according to any one of claims 1 to 4, wherein the wire has a tensile strength that does not break even if the ring material is crushed until the opposing inner surfaces abut against each other . The impact energy absorption amount setting method for an impact absorber according to claim 1, wherein the ring material is adjusted by adjusting a thickness of the ring material or a diameter of the ring material and a width of the load surface in a diameter direction of the ring material. An impact energy absorption amount setting method for an impact absorber, comprising adjusting an impact energy absorption amount due to deformation of a material. 6. The impact energy absorption amount setting method for an impact absorber according to claim 5 , wherein the wire material is set to have a tensile strength that does not break even if the ring material is crushed until the opposing inner surfaces abut against each other.

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