JP3860741B2 - Shock absorbing fence and shock absorbing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an impact absorbing fence and an impact absorbing method for absorbing impact forces such as falling rocks, avalanches, and falling sand.
[0002]
[Prior art]
The shock-absorbing fence is basically composed of struts erected on the slope with a predetermined interval, and a rope protection net horizontally installed between these struts.
As the protective net, there are known a “slip type” that uses a friction resistance type shock absorber to absorb an impact by a sliding resistance between the rope and the shock absorber, and a “non-slip type” that does not slide.
In the slip type, as shown in FIG. 17, a cushioning device e is provided at the intersection of the ropes d crossed, and a horizontal rope g straddling between a plurality of cushioning devices e provided in each support column f as shown in FIG. There are known a configuration in which the end portion and the intermediate portion are gripped, and a configuration in which both ends of the horizontal rope g are gripped by the shock absorber e in units between the struts f and f as shown in FIG.
[0003]
[Problems to be solved by the invention]
The conventional shock absorbing fence has the following problems.
<A> The non-slip type has not only lower shock absorption performance by the protective net compared to the slip type, but also requires the entire fence to be designed to be large and heavy, and there is a drawback that the shock absorption cost is high.
<B> Because the slip type of the slip type increases the amount of deformation of the protective net when receiving a non-slip, it will not be adopted when the fence installation site approaches various transportation facilities (roads or tracks) or houses. , Restricted by the installation site.
Furthermore, since a large number of shock absorbers are used, it takes a lot of work and time for the shock absorber installation work and the rope gripping work.
<C> Both types have a common difficulty in that there is a single protective net, and there is a limit to the rope diameter that can be used.
<D> When the protective net is in a form in which a plurality of horizontal ropes are arranged in multiple stages at predetermined intervals, it is necessary to take measures to prevent the opening between the horizontal ropes, and no suitable technique has been proposed yet. .
[0004]
This invention is made | formed in view of the above point, The place made into the objective is providing the impact-absorbing technique which can exhibit high impact-absorbing performance, controlling the opening of a rope between ropes uniformly.
[0005]
[Means for Solving the Problems]
That is, the invention according to claim 1 is a shock absorbing fence in which a plurality of ropes are horizontally mounted between columns that are erected at a predetermined interval. The shock absorbing fence is characterized in that a wavy connecting member is arranged in a direction, and the multi-staged rope, the connecting member and an intersection are fastened with a fastener.
The invention which concerns on Claim 2 has the buffer function which hold | maintained the support | pillar standing at predetermined intervals and the end part of the rope of the length which can be wound between the said support | pillar so that sliding was possible with the buffer. A plurality of protective loops, and a wavy connecting member disposed across the plurality of protective loops and arranged in the crossing direction of the protective loops. An impact-absorbing fence, characterized in that the connecting material is arranged in a crossing direction on one side or both sides of a plurality of protective loops wound around and the crossing part of the connecting material and the protective loop is fastened with a fastener. is there.
The invention according to claim 3 is the impact absorbing fence according to claim 2, wherein a protective loop is looped in a chain between adjacent struts while sharing the struts.
The invention according to claim 4 is the impact absorbing fence according to claim 2 or claim 3, wherein the protective loop has a rope length that can be wound a plurality of times between the support columns.
[0006]
In any of the above, the intersection of the rope or protective loop and the crossing member may be slidably fastened, and the impact may be absorbed by the sliding resistance of the intersection.
Further, in the invention according to claim 5 or 6, it is composed of a plurality of ropes or protective loops, and is arranged by adding a wire mesh to the receiving surface to improve impact absorption performance and improve trapping performance such as falling rocks. May be.
[0007]
In the invention according to claim 5, a plurality of ropes are horizontally laid between struts erected at a predetermined interval, straddle a plurality of ropes arranged in a multistage, and corrugated toward the crossing direction of the ropes. The connecting material is arranged, and the multi-staged rope and the connecting material and the crossing portion are fastened by a fastener, and the connecting material is plastically deformed while the opening of the protective loop is restricted to a certain level by the connecting material. The shock absorbing method is characterized in that the shock is absorbed by.
According to a sixth aspect of the present invention, a protective loop is formed by slidably gripping the end of the rope with a shock absorber, and the protective loop is wound in multiple stages between struts erected at a predetermined interval. The connecting member is arranged in a crossing direction on one or both sides of the plurality of protective loops, and the crossing portion of the protective loop and the connecting member is fastened with a fastener, and the buffering action by the protective loop, the protective loop and the support column The shock absorbing method is characterized in that the shock is absorbed by the sliding resistance and the buffering action caused by plastic deformation of the connecting material, and the opening between the ropes is limited to a constant by the connecting material.
[0008]
Further, in the above-described fifth or sixth aspect, the crossing portion of the rope or the protection loop and the crossing member may be slidably fastened, and the impact may be absorbed by the sliding resistance of the crossing portion.
Further, in the invention according to claim 5 or 6, it is composed of a plurality of ropes or protective loops, and is arranged by adding a wire mesh to the receiving surface to improve impact absorption performance and improve trapping performance such as falling rocks. May be.
[0009]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1
Embodiments of the present invention will be described below with reference to the drawings.
[0010]
<A> Configuration of Shock Absorbing Fence FIG. 1 shows a side view of the mountain side from the valley side of a shock absorbing fence 10 partially broken.
The shock absorbing fence 10 according to the present invention includes a plurality of support columns 20 erected at predetermined intervals, a protection loop 30 wound around the support columns 20 and 20 in a loop, and a protection loop 30. The friction resistance type shock absorber 40 gripping the vicinity of the end portion and the cross member 50 attached across each protection loop 30 are used as basic components.
[0011]
In this example, the upper part of each support column 20 is connected by a horizontal bar 60 and a rhombus wire mesh 70 is attached to one side of the protective loop 30 group. However, the horizontal bar 60 and the metal net 70 may be omitted. .
[0012]
<B> Struts As shown in FIG. 2 in an enlarged manner, the struts 20 are, for example, steel pipes, concrete-filled steel pipes, concrete pillars, elastic struts, etc., and it is desirable to form the surface to be wrapped around the protective loop 30 as a curved surface.
U-shaped positioning protrusions 21 are provided in multiple stages along the length direction on the side surface of the support column 20, and a protective loop 30 is inserted into each positioning protrusion 21 to prevent slipping off.
More desirably, if the formation pitch of the positioning protrusions 21 is made narrower as it goes downward with respect to the upper side of the support column 20, the trapping ability of small diameter falling rocks is improved.
Specifically, the arrangement interval in the vertical direction of the protection loop 30 is appropriately selected and determined in consideration of the expected size of falling rocks, avalanche and falling rocks, and the like. A depression may be used instead of the protrusion.
[0013]
The lower part of the support column 20 may be supported on the ground or a concrete foundation so as not to be tilted, but may be supported so as to be tilted by adopting a hinge structure.
In the case where the support column 20 is configured to be tiltable, it is necessary to combine it with a holding rope with a buffer provided therebetween.
[0014]
<C> Protective loop The protective loop 30 is a rope made of, for example, a PC steel wire or a steel wire from PC, which has excellent tensile strength, and is wound in a loop shape between the adjacent struts 20 and 20 without any slack in the horizontal direction. The overlapping portion near both ends of the rope is gripped by the shock absorber 40. A stopper is provided at the end of the rope to restrict the escape from the shock absorber 40.
Rope ranges extending from the gripping positions of the shock absorbers 40 of the respective protection loops 30 are formed as the extra length portions 31 and 31. The sliding (slip) distance of the protective loop 30 at the time of impact is determined by the set length of the surplus length portions 31 and 31.
[0015]
When there are three or more struts 20, the protection loops 30 and 30 are wound around each strut 20 located between the terminal struts from both directions except for the struts of the terminal.
The protection loops 30 are chain-wrapped and horizontally mounted so that each support column 20 has a shared relationship with the left and right protection loops 30 and 30.
[0016]
In addition, if the same level of shock absorption performance as that of a conventional fence with a single rope placed horizontally between the columns is secured, the ropes constituting the protective rope 30 are arranged in multiple layers, and force transmission is performed within the loop formation range. Therefore, the rope diameter of the protective loop 30 can be reduced.
[0017]
<D> Shock absorber The shock absorber 40 grips the overlapping portion of the protective loop 30 and allows the rope to slide when the tensile force acting on the protective loop 30 exceeds the frictional resistance force of the gripping portion. It is an instrument that attenuates.
The shock absorber 40 illustrated in FIGS. 3 and 4 includes a restraint plate 41 that is formed by folding the center of a spring steel plate into a bulbous cross section, and is inserted into the restraint plate 41 to divide the inner space into two parts, thereby defining a rope storage space. The partition plate 42 is composed of a plurality of bolts 43 and nuts 44 that fasten the free end of the restraint plate 41 in the contraction direction and tighten the protective rope 30 in contact with the restraint plate 41 and the partition plate 42.
The bolt tightening force applied to the restraint plate 41 acts as an equal restraint force on both ropes, and the frictional resistance of the contact portion between the restraint plate 41 and the partition plate 42 brought into pressure contact with the peripheral surface of each rope. It has a structure that can attenuate the tensile force acting on the rope.
[0018]
The illustrated shock absorber 40 is formed of a single plate, so that it can be restrained with an equal force using the spring force of the restraining plate 41, and is made of a conventional cast iron that is a heavy object of several tens of kilometers. Since it is smaller and lighter than the shock absorber, there is an advantage that transportation and assembly are easy.
[0019]
As the shock absorber 40, in addition to the illustration, a known frictional resistance shock absorber comprising a plurality of plate members that can grip the overlapping portion of the protective loop 30 and bolts that can be fastened between these plate members can be used. It is.
[0020]
<E> Crossing material 50 The crossing material 50 is a strip-like or rod-like member having a wave shape and has a length that can be attached across a plurality of protective loops 30.
The cross members 50 are arranged across the plurality of protection loops 30, 30... To maintain the installation interval between the protection loops 30 and to transmit force between the adjacent protection loops 30. This is to prevent the ropes before and after each of the protection loops 30 from penetrating, and to divide the receiving space (region) of the protection loops 30 arranged in multiple stages to make it easier to receive small impact objects.
[0021]
The reason for forming the wave shape is to absorb the impact energy by deformation of the cross member 50 in the extending direction at the time of impact as shown by the vertical arrows in FIG.
When the wave-like part located between the adjacent protective loops 30 extends in a straight line, the interval between the protective loops 30 becomes the maximum, and the further opening between the adjacent protective loops 30 is restricted.
Accordingly, it is advantageous to form the corrugated cross member 50 continuously over the entire length as shown in this example, but the corrugated portion may be formed in a part of the straight cross member 50.
[0022]
As the material of the cross member 50, for example, a plastically deformable material such as steel or an elastically deformable material such as spring steel can be used, and the material is not particularly limited.
[0023]
In attaching the cross member 50, as shown in FIG. 5, the upper ends of a pair of cross members 50, 50 opposed to each other are connected to the lower end of the branch member 51 suspended from the horizontal rod 60. The branch member 51 and each cross member 50 may be formed integrally with a continuous material, or may be welded separately, but also serves as a U-shaped spacing maintaining material arranged inside as shown in the figure. The receiving plate 52 may be connected in combination with a U bolt 53 and a nut 54 that can accommodate each rope of the protective loop 30.
That is, a bolt hole is drilled in the overlapping portion of the three members of the cross member 50, the branch member 51, and the receiving plate 52. The U bolt 53 containing the rope is inserted into these three members 50, 51, 52 and fastened with a nut 54.
[0024]
With respect to the other protective loops 30 except for the uppermost layer, as shown in FIG. 6, the intersection of the rope and the cross member 50 arranged in a multistage manner by the combination of the rectangular receiving plate 55, the U bolt 53, and the nut 54 is held. .
[0025]
Each rope of the protective loop 30 is accommodated in the trough of the cross member 50 and tightened with the U bolt 53, so that a wide contact area with the rope peripheral surface can be secured and tightened.
Also, if the fastening force is set so that it can slide relatively when an external force exceeding the fastening force is applied to either the rope or the cross member 50, the sliding resistance absorbs energy. Is also possible.
[0026]
[Action]
Next, the impact absorbing action when various impact forces F act on the impact absorbing fence 10 from above to below in FIG. 7 will be described.
[0027]
<I> The impact force F acts on the front surface (the side where the shock absorber 40 is not provided) of the protective loop 30 arranged in multiple stages via the initial collision wire mesh 70.
This impact force F is transmitted to the back surface of the protective loop 30 (the side on which the shock absorber 40 is provided) through the winding portion around the support column 20, and acts as a uniform tensile force over the entire loop length of the protective loop 30.
Further, since the crossing member 50 intersects with the plurality of protective loops 30, 30... Arranged in a multistage manner, the crossing member 50 can be received without passing through even if the impact force F is small.
As long as this tensile force does not exceed the gripping force of the shock absorber 40 of the protective loop 30, the rope does not slide, and therefore the loop length of the protective loop 30 does not change.
[0028]
Since the adjacent protection loops 30 and 30 can transmit force via the support column 20, the impact force F is transmitted to the protection loop 30 or the support column 20 at a portion where the impact force F does not act directly, and a plurality of protection loops 30. And a plurality of support columns 20 are distributed and supported.
[0029]
<B> Although the impact force F can be absorbed to some extent by the deformation strength of the shock absorbing wire mesh 70 and the protective loop 30, the impact absorbing fence 10 according to the present invention mainly absorbs the impact force F by a plurality of impact absorbing functions described below. Absorb.
[0030]
(1) Impact absorbing action due to deformation of the crossing material The impact force F acts as a force to push and widen the space between the upper and lower protective loops 30. When this force exceeds the deformation strength of the cross member 50, the cross member 50 is deformed and stretched by a certain length as shown in FIG. The impact force F is absorbed by the deformation resistance when the cross member 50 is stretched.
As the cross member 50 extends, the distance between the upper and lower protective loops 30 and 30 increases slightly. However, when the cross member reaches the maximum extension, the interval between the protective loops 30 is regulated to be constant.
[0031]
(2) Impact absorbing action by sliding of the crossing member and the rope The impact force F acts as a force for shifting the rope of the protective loop 30 and the crossing member 50 in a crossing relationship along the rope.
When this force exceeds the fastening force for fastening the rope of the protection loop 30 and the crossing portion 50, the sliding is performed between the members 30 and 50, and the impact force F is absorbed by the sliding resistance.
[0032]
(3) Shock absorbing action by the shock absorber When the impact force F exceeds the gripping force of the shock absorber 40, it slides (slips) between the rope constituting the protective loop 30 and the shock absorber 40, and friction during sliding The impact force F is effectively absorbed by the resistance.
[0033]
(4) The shock absorbing action rope due to the sliding resistance between the protective loop and the support column. As the sliding between the shock absorber 40 and the shock absorber 40 starts, the loop length of the protective loop 30 becomes longer. Sliding also occurs at the wrapping portion. The absorbing action of the impact force F proceeds also by the frictional resistance of the winding portion.
[0034]
The plurality of shock absorbing actions described above are possible until the surplus length portions 31, 31 are shortened and the stopper comes into contact with the shock absorber 40.
[0035]
<C> Other Actions of Crossing Material In addition to helping to absorb the impact force F, the crossing material 50 also acts as follows.
As shown in FIG. 8, as the protective loop 30 is extended, the pair of cross members 50, 50 are dragged in opposite directions by the ropes and deformed in the lateral direction. As a result, the pair of cross members 50, 50 that have been overlapped before receiving are opened, and the section range of each of the protective loops 30, 30,.
Therefore, when the impact force F is a falling rock, the subsequent small falling rock is prevented from being transmitted and similarly buffered.
[0036]
FIG. 9 shows a cross-sectional view of the fence when the protection loops 30, 30 arranged in multiple stages are extended and protruded sideways.
Of the protection loops 30 and 30 arranged in multiple stages, the cross member 50 on the right side of the drawing arranged on the front side abuts against the ropes 30b and 30c on the back side and restricts further protrusion.
[0037]
In addition, when the front side rope 30a constituting the protective loop 30 protrudes laterally, there are few cases where the rope 30a moves horizontally to the side, and it moves in either of the up and down directions. Therefore, the front-side rope 30a enters between the rear-side ropes 30b and 30c, and the ropes are arranged in the lateral direction at an interval narrower than the installation interval of the protection loop 30. That is, the distance between the ropes 30a and 30b is substantially narrower than before the impact force F is applied.
The above description is made on the basis of the rope on the front side for convenience, but other ropes enter between the ropes in the same manner even if the rope on the back side is used as a reference.
When the distance between the horizontal ropes is narrowed, not only can the load of the wire net 70 be reduced, but the trapping ability of small-diameter rocks will be improved.
[0038]
<D> The reason why the overhang amount of the rope is small and as will be described later, the shock absorbing fence 10 according to the present invention requires a small overhang amount to the side of the protective loop 30.
[0039]
FIG. 10 shows a model diagram of a single type of shock absorbing fence for comparison, in which one end is fixed to each column, ropes are arranged, and the center of the overlapping portion of both ropes is held by a shock absorber (not shown).
(A) of the figure shows a state before receiving, and (B) at the same time shows a state after receiving. For example, when the distance L between the struts is 6 m and the distance l of the extra length portion of the rope is 0.5 m, the protruding amount Δy ₁ of the rope after the impact is 1.25 m.
[0040]
FIG. 11 shows a model diagram of the shock absorbing fence according to the present invention in which a protective loop is stretched between the columns. (A) in FIG. 11 shows a state before receiving, and (B) at the same time shows receiving. Shows the state after the shot.
For example, when the distance L between the struts is 6 m and the distance l of the extra length of the rope is 0.5 m, the protruding amount Δy ₂ of the rope after the impact is 0.875 m. However, the length of the winding part of the protective loop was ignored to simplify the calculation.
[0041]
In this way, when the sliding amount (energy absorption amount) is the same, the protruding amount of the rope is smaller in the protective loop 30 as in the present invention, which is advantageous when the shock absorbing fence 10 is installed on the road or the like. .
Further, the shock absorbing fence 10 according to the present invention not only reduces the diameter of the rope but also excels in terms of shear strength compared to the single type.
[0042]
Second Embodiment of the Invention
Other embodiments will be described below. In the description, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
[0043]
A pair of cross members 50, 50 may be attached to a plurality of protective loops 30, 30, ... without using the branch member 51. By attaching in this way, the branch material 51 can be omitted, and the number of components can be reduced and the installation work can be simplified.
[0044]
In the first embodiment, the case where a pair of cross members 50, 50 are used as a pair on both sides of the front surface and the back surface of the plurality of protection loops 30, 30. You may make it provide in any one surface of a receiving surface) or a back surface.
It is suitable for applications where the acting impact force F is small.
[0045]
The connecting member 50 is not limited to a single continuous member, and a cross member divided into a plurality of pieces may be arranged along the height direction of the fence.
In this case, a plurality of divided cross members are arranged so that the force can be continuously transmitted across the protection loops 30, 30... Arranged in multiple stages without being interrupted in the middle of the divided cross members 50. There is a need.
By dividing the connecting material 50, transportation and assembly are improved.
[0046]
Further, the cross member 50 may be arranged in an oblique direction and attached to the protective loops 30, 30.
As a form of arrangement of the cross members 50, the protective loops 30, 30... Are arranged with the inclined directions aligned in the same direction, or alternately changed in the inclined direction like a wavy shape.
Further, the inclination direction may be changed between the front and back surfaces of the protective loops 30, 30.
[0047]
Embodiment 3 of the Invention
The protective loop 30 may have a winding form described below.
In addition, it is the same as that of embodiment mentioned above to arrange | position and provide the crossing material 50. FIG.
[0048]
FIG. 12 shows another form in which a protective loop 30 is arranged between the support columns 20 and 20 in a shape of a plane eight and wound.
In this example, the winding angle (winding length) of the protection loop 30 with respect to the support column 20 is longer than in the first embodiment, so that the sliding resistance at the time of impact is increased and the shock absorbing performance is improved. it can.
[0049]
As shown in FIG. 13, when the protective loop 30 is wound around the support column 20 once or a plurality of times, the sliding resistance between the protective loop 30 and the support column 20 is increased, and the shock absorbing performance can be further improved.
[0050]
FIG. 14 shows another embodiment using a protective loop 30 in which the rope can be wound twice or more at the same height between the support columns 20 and 20.
[0051]
FIG. 15 shows another form in which a rope constituting the protective loop 30 is wound in a zigzag manner two or more times along the longitudinal direction of the support columns 20.
In this example, the dispersibility of the impact force is improved by the increase in the number of times the protective loop 30 is wound.
[0052]
FIG. 16 shows another embodiment in which the winding protrusions 22 are provided in one stage on one side of the support pillars 20 and 20 and the protective loop 30 is wound between the adjacent protrusions 22 and 22.
In this example, a case where one protective loop 30 is wound around one protrusion 22 is shown, but the left and right protective loops 30, 30 of the support column 20 are wound around one protrusion 21 together to share the protrusion 21. You may do it.
[0053]
Further, it is desirable to arrange the protection loop 30 on the side facing the receiving direction of the support column 20 or to form a bulging portion at the tip of the protrusion 22 so that the protection loop 30 does not come off at the time of receiving.
[0054]
When the protection loop 30 is used for the shock absorbing fence, there are the following advantages.
<A> Since the protective loop 30 having a buffering function is wound between the support columns 20 and 20, the dispersibility of the impact force and the shear strength can be improved, and an impact absorbing fence with high impact absorbing performance can be provided.
<B> Compared to a fence with a flat protective net, the amount of overhang of the protective loop 30 can be reduced, which is advantageous when installing on a site where the amount of overhang is limited, such as on the road. .
<C> Since the number of use of the shock absorbers 40 is small, the time, labor and economic burden required for construction of the fence can be greatly reduced.
<D> Since the impact force dispersion performance increases in proportion to the number of times the protective loop 30 is wound, the impact absorption performance of the entire fence can be dramatically improved.
[0055]
Embodiment 4 of the Invention
The above has described the case where the cross member 50 is provided on the shock absorbing fence formed by wrapping the protective loops 30, 30... Between the struts. It may be applied to various well-known shock absorbing fences that are horizontally mounted. In this case, the wavy connecting material is arranged in the crossing direction of the ropes across the plurality of ropes arranged in multiple stages, and the ropes arranged in multiple stages, the respective connecting materials, and the intersecting portions are fastened with fasteners.
The impact is absorbed by the buffering action due to the plastic deformation of the connecting material and the sliding resistance with the rope while restricting the opening between the ropes to be constant by the connecting material, as in the embodiment of the prosthetic hand.
[0056]
In this example, the present invention can be applied to an existing or new shock absorbing fence in which a plurality of ropes are arranged in a multistage manner between support columns, and is highly versatile.
In addition, shock absorbing performance can be greatly improved by simply placing a cross member.
[0057]
【The invention's effect】
The present invention prevents the opening of a rope and provides plastic deformation of the crossing member only by providing a wavy crossing member by crossing a plurality of ropes installed between the supporting columns or a protection loop arranged in multiple stages on the supporting column. This makes it possible to absorb the impact effectively.
[Brief description of the drawings]
FIG. 1 is a front view of an impact absorbing fence according to a first embodiment of the present invention. FIG. 2 is a perspective view of a support part and a loop portion of a protective loop with a part omitted. 4] Cross-sectional view of the center of the shock absorber [Fig. 5] Perspective view showing the mounting state of the upper part of the cross member with a part omitted [Fig. 6] Perspective view showing the fastening structure at the intersection of the cross member and the protective loop 7] Explanatory diagram of action of impact absorbing fence [Fig. 8] Front view of impact absorbing fence at the time of impact [Fig. 9] Cross-sectional view of IX-IX in Fig. 8 [Figure 10] Rope extension of contrast fence FIG. 11 is a model diagram for explaining, (A) is a model diagram before receiving, (B) is a model diagram after receiving, and FIG. 11 is a model diagram for explaining the overhang amount of the protective loop, (A ) Is a model diagram before the impact, and (B) is a model diagram after the impact. [FIG. 12] An explanation of the winding form of another protective loop wound around the 8 o'clock. FIG. 13 is an explanatory view of another protective loop winding form in which a rope is wound around a support post. FIG. 14 is an explanatory view of another protective loop winding form in which multiple ropes are wound between support posts. FIG. 16 is an explanatory diagram of another embodiment of a protection loop in which a rope is wound in a zigzag manner between struts. FIG. 16 is an explanatory diagram according to another embodiment in which a protection loop is horizontally mounted on one side of a strut. ) Is a plan view of a shock absorbing fence with a part omitted, and (B) is a front view with a part omitted. FIG. 17 is an explanatory diagram of a protective net assumed by the present invention. FIG. 18 is based on the present invention. Explanatory drawing of shock absorbing fence [Fig. 19] Explanatory drawing of other shock absorbing fence assumed by the present invention [Explanation of symbols]
10 Shock Absorbing Fence 20 Strut 30 Protective Loop 31 Extra Length 32 Stopper 40 Buffer 50 Crossing Material

Claims (6)

In the shock-absorbing fence in which a plurality of ropes are horizontally mounted between the columns that are erected at predetermined intervals,
Crossing multiple ropes arranged in multiple stages, arranging wavy connecting materials in the crossing direction of the ropes,
The rope arranged in multiple stages and the connecting material and the intersection are fastened with a fastener,
Shock absorbing fence. Support columns that are erected at a predetermined interval;
A plurality of protective loops having a buffer function in which the vicinity of the end of the rope of a length that can be wound between the columns is slidably held by a buffer;
It consists of a wavy connecting material that straddles multiple protective loops and is arranged in the crossing direction of the protective loops.
The guard loop is wound around the support column in a multistage manner and horizontally mounted,
The connecting material is arranged in a crossing direction on one side or both sides of the plurality of protective loops wound in a multistage manner, and the crossing portion of the connecting material and the protective loop is fastened with a fastener,
Shock absorbing fence. The shock absorbing fence according to claim 2, wherein a protection loop is chain-wrapped between adjacent struts while sharing the struts and is horizontally mounted. The shock absorbing fence according to claim 2 or 3, wherein the protection loop has a rope length that can be wound around the support a plurality of times. A plurality of ropes are laid in a multi-stage between struts erected at a predetermined interval,
Crossing multiple ropes arranged in multiple stages, arranging wavy connecting materials in the crossing direction of the ropes,
Fasten the multi-stage arranged rope and the connecting material and the intersection with a fastener,
While the opening between the protective loops is limited to a certain level by the connecting material,
The shock is absorbed by plastic deformation of the connecting material,
Shock absorption method. Grip slidably with a shock absorber near the end of the rope to form a protective loop,
The protection loop is wound in a multistage manner between the support columns set up at a predetermined interval,
The connecting material is arranged in a crossing direction on one side or both sides of the plurality of protective loops, and a crossing portion of the protective loop and the connecting material is fastened with a fastener,
In addition to absorbing shock by the buffering action by the protective loop, the sliding resistance of the protective loop and the column, and the buffering action by plastic deformation of the connecting material,
The opening between the ropes is limited to a certain amount by the connecting material,
Shock absorption method.

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