KR20220091561A - shock absorbing fence - Google Patents

Abstract

[Project] To provide a shock-absorbing fence that can increase the safety performance of the shock-absorbing fence by reducing the maximum impact force during water hammer.
[Solution means] A plurality of struts 10, an upper side rope 21 provided taut between the upper portions of the adjacent struts 10, a shock absorber 30 provided in a part of the upper side rope 21, and a protective net In the shock absorbing fence having (20), independently in units of spans of the posts (10), a plurality of load transmission ropes (23) and terminal posts (10b) spanning horizontally between the upper parts of adjacent posts (10) A side stay rope 24 connected between the upper part and the side anchor 40 of spanned across the

Description

shock absorbing fence

The present invention relates to a shock absorbing fence for catching falling objects such as falling rocks, collapsing soil and avalanche, and particularly to a shock absorbing fence designed to reduce the maximum impact force by a simple structure.

A shock-absorbing fence equipped with a post (支柱) and a protective net is well known, and variously proposed according to the size of the shock-absorbing performance.

An example of a conventional shock absorption fence is demonstrated with reference to FIG.6(A).

In Patent Documents 1 and 2, a plurality of transverse ropes 51 horizontally spanned between the upper and lower portions of adjacent posts 50, and a plurality of transverse ropes 51 provided near both ends of each transverse rope 51 A shock absorbing fence comprising a shock absorber (52) and a protective net (53) surrounded by a plurality of transverse ropes (51) is disclosed.

In Patent Document 3, in order to prevent damage due to excessive stress acting on the root of the strut 50 during water hammer, each strut 50 can be tilted toward the omnidirectional (360 °). A shock-absorbing fence that stands upright is disclosed.

Japanese Patent Laid-Open No. 6-57712 Japanese Patent Laid-Open No. 2000-273828 Japanese Patent Laid-Open No. 2009-185514

The problems of the conventional shock absorbing fence will be described with reference to FIG. 6B , which is a model diagram of the shock absorbing fence when the falling object W collides.

<1> The conventional shock-absorbing fence that absorbs impact energy in units of span is huge in a short time with respect to the post 50, the transverse rope 51, the shock absorber 52, and the protection net 53 located in the water hammer span. load is concentrated.

Therefore, in the design of the shock-absorbing fence, the maximum impact force of the falling object W must be greatly anticipated and designed.

<2> In order to counteract the maximum impact force assumed, the material cost of the impact-absorbing fence increases because the structural materials such as the post 50 and the protective net 53 constituting the shock-absorbing fence must be designed with high strength.

<3> When the protection net 53 located in the water hammer span is deformed toward the trough side, the posts 50 and 50 located in the water hammer span are dragged and inclined indefinitely toward the trough side and the direction approaching each other. . When the struts 50 and 50 are greatly intensified, the fence height of the non-water hammer span adjacent to the water hammer span decreases, and the trapping performance for the subsequent falling object W in the non-water hammer span decreases.

The present invention has been made to solve the above problems, and an object thereof is to provide a shock absorbing fence capable of increasing the safety performance of the shock absorbing fence by reducing the maximum impact force at the time of water hammer.

The present invention provides a plurality of posts consisting of an intermediate post and a terminal post, and an upper side rope taut between the upper parts of adjacent posts independently in units of spans of the posts, and is provided in a part of the upper side rope, In the shock-absorbing fence having a shock absorber that attenuates the tension when a tension of a certain level or more is applied to the rope, and a protective net in which the upper side is supported on the upper side rope, independently in span units of the holding, horizontally between the upper parts of the neighboring posts A plurality of load transfer ropes spanning the pole and a lateral stay rope connected between the upper part of the terminal strut and the lateral anchor are provided, and the load transfer rope is made to have a greater slack than the upper rope, and horizontally between the upper parts of the neighboring struts. It is characterized by being worn.

In another aspect of the present invention, the load of the non-water hammer span at the time of water hammer supporting the longitudinal force of the strut positioned in the water hammer span with the lateral anchor via the load transfer rope and the lateral stay rope of the adjacent non-water hammer span It is configured to transmit the load only to the upper rope by supporting the hardness of the prop located in the water hammer span through the load transfer time until the sagging of the transmission rope is lost.

Another aspect of this invention WHEREIN: You may interpose a shock absorber in a part of the said side stay rope.

In this case, the operation starting force of the shock absorber of the side stay rope is set to have a large relationship compared with the operation starting force of the shock absorber of the upper change rope.

In another aspect of the present invention, the shock-absorbing fence is a logarithmic formula in which the lower side of the protective net is supported by the lower part of the post, the logarithmic formula in which the lower side of the protective net is fixed to the slope mountain side and supported by a logarithmic formula, or protection It is applicable to any one type of pocket type in which the lower side of the net is placed on the side of the slope.

The present invention has the following effects.

<1> By allowing the load transfer rope to be stretched horizontally between the upper parts of the neighboring posts, it is possible to lengthen the load transfer time through the load transfer rope.

Therefore, the shock absorption time in the water hammer span is prolonged, the maximum impact force in the water hammer can be reduced, and the safety performance of the shock absorption fence can be improved.

<2> By reducing the maximum impact force, the load burden of each material constituting the impact-absorbing fence can be reduced, and the material cost of the impact-absorbing fence can be significantly reduced.

<3> By limiting the free hardness of the post in which the load transmission rope is located in the non-water hammer span to a certain range, it is possible to minimize the change in the fence height of the protective net in the non-water hammer span.

Accordingly, it is possible to ensure the subsequent capture of the falling object by the protection net located in the non-water hammer span.

<4> By setting the operation starting force of the shock absorber of the side stay rope to be large compared to the operation starting force of the shock absorber of the upper rope, the shock absorber provided on the upper and lower rope is operated prior to the water hammer at the time of water hammer It can be supported by reliably transmitting the impact force of the lateral anchor.

<5> It can be applied to various types of shock-absorbing fences with different installation positions of the lower side of the protection net, so it is versatile.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view of the shock absorption fence which concerns on this invention which abbreviate|omitted part.
Figure 2 is an explanatory view of the mounting structure of the upper and lower ropes and posts, (A) is a perspective view of the mounting portion of the upper and lower ropes and posts omitted in part, (B) is an exploded assembly view of the shock absorber
Fig. 3 is a front view of the shock-absorbing fence before the water hammer with parts omitted;
4 is a front view of the shock-absorbing fence at the time of water hammer with a part omitted;
5 is an explanatory view of another embodiment applied to another shock absorbing fence, (A) is a model diagram of a shock absorbing fence applied to a logarithmic shock absorbing fence supported by fixing the lower side of the protective net to the slope side, (B) is a model diagram of a shock-absorbing fence applied to a pocket-type shock-absorbing fence with the lower side of the protective net placed on the slanted side.
Figure 6 is a front view of the shock absorption fence premised on the present invention

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated, referring drawings.

<1> Overview of the shock absorption fence

When described with reference to Figure 1, the shock-absorbing fence of the present invention, a plurality of poles 10 and a plurality of struts 10 standing at a predetermined interval, a protective net 20 surrounded between the plurality of poles 10, and the struts ( Independently in the span unit of 10), the upper and lower side ropes 21 and 22 having the shock absorber 30 taut between the upper and lower portions of the neighboring posts 10, and the span units of the posts 10 Independently, a plurality of load transfer ropes 23 spanning horizontally between the upper parts of the neighboring posts 10, and side stay ropes 24 connected between the upper part of the terminal post 10b and the side anchors 40 to provide

Hereinafter, each constituent material of the shock-absorbing fence according to the present invention will be described in detail.

<2> Holding (intermediate holding, terminal holding)

The post 10 is composed of an intermediate post 10a and a terminal post 10b, and any one of a well-known steel material such as a section steel or a steel pipe, a concrete column, a steel pipe and a filled steel pipe that is a combination of concrete, etc. One type can be applied.

The standing form of the post 10 may be erected so that it can be erected, and the lower part of the post 10 may be buried in a concrete foundation or local ground, etc.

The hardness-type post 10 is a hinge structure that allows hardness along the inclination direction of the slope in addition to the standing structure (eg, Japanese Patent Application Laid-Open No. 2009-185514, etc.) that allows hardness in all directions. may be

In addition, although not shown in figure, when the pole 10 is a forward-facing hardness type, in order not to impair the free hardness of the pole 10, the mountain side stay rope connected between the head part of the pole 10 and the mountain side anchor. is set to one per one post (10).

In this case, a well-known shock absorber may be interposed in a part of the mountain side stay rope.

<3> protection net

The protection net 20 is a well-known net material which can span across the span unit or multiple spans of the post 10 between the upper and lower parts of the adjacent post 10 horizontally.

The protective net 20 may be a metal or fiber rope net, wire mesh, or polymers thereof.

The upper and lower sides of the protection net 20 are attached to each of the upper and lower side ropes 21 and 22 via a connecting coil or the like.

<4> Upper and lower side ropes

The upper side rope 21 and the lower side rope 22 are rope materials for supporting the upper and lower sides of the protection net 20, and are taut with little sagging between the upper and lower sides of the neighboring posts 10. .

<4.1> Rope length

Referring to FIGS. 1 and 2 , each of the upper and lower side ropes 21 and 22 has an overall length longer than the span length of the post 10 .

Both ends of each of the upper and lower side ropes 21 and 22 penetrate through the through holes 11 of the upper and lower parts of the post 10, respectively, and the shock absorber 30 disposed in contact with the outer circumferential surface of the post 10 is provided on each of the upper and lower sides. The vicinity of the ends of the ropes 21 and 22 is slidably gripped.

The ends of the upper and lower side ropes 21 and 22 extend and protrude outward from the shock absorber 30 as a cross section.

<4.2> Shock Absorber

The shock absorber 30 is a device for damping the tension of the rope when a predetermined or more tension is applied to each of the upper and lower side ropes 21 and 22 .

When the friction sliding type shock absorber 30 illustrated in FIG. 2B is described, the shock absorber 30 is a pair of semi-grooves capable of gripping the upper and lower ropes 21 and 22 respectively. A clamping plate 31 of When the tension of the interposed upper and lower ropes 21 and 22 exceeds the gripping force, the upper and lower ropes 21 and 22 slide.

The shock absorber 30 is not limited to the friction sliding type, and a known shock absorber may be applied as long as it has a structure capable of damping the tension when a predetermined or more tension is applied to the upper and lower ropes 21 and 22 .

<5> load transfer rope

The load transmission rope 23 is a rope material for transmitting a load between the adjacent posts 10 , and both ends thereof are fixed to the upper part of the adjacent posts 10 so as to be non-slidable.

<5.1> Sagging of the load-carrying rope

Whereas the upper change rope 21 is provided taut between the upper parts of the neighboring posts 10 , the load transfer rope 23 is horizontally spread by having a predetermined slack between the upper parts of the neighboring posts 10 .

It is difficult to provide the upper change rope 21 taut in a state where there is no sagging completely, and some sagging occurs in the upper change rope 21 .

The sagging of the load transfer rope 23 is an amount of sagging compared to the upper-variable rope 21 , and the load-transmitting rope 23 has a large sag compared to the upper-variable rope 21 .

<5.2> Reasons for having sagging in the load-carrying rope

The reason why the load transmission rope 23 has a predetermined slack is to preferentially operate the shock absorber 30 located in the water hammer span and to reduce the maximum impact force of the shock absorbing fence.

In other words, this is to lengthen the operation time of the shock absorber 30 provided in the water hammer span by extending the load transmission time when the load is transmitted in series to the post 10 of the non-water hammer span at the time of water hammer.

On the other hand, since the hardness of the post 10 located in the water hammer span increases in proportion to the amount of sagging of the load transmission rope 23, the amount of sagging of the load transmission rope 23 in consideration of the span length of the post 10, etc. Choose appropriately.

<6> Side stay rope

A lateral anchor 40 is provided on the side of the terminal strut 10b on the extension line of the shock absorbing fence, and the lateral stay rope 24 is connected between the lateral anchor 40 and the upper part of the terminal strut 10b.

By supporting the terminal post 10b with the side stay rope 24, load transmission between the plurality of load transmission ropes 23 and the side stay rope 24 becomes possible, and the impact force acting on the water hammer span is finally reduced. It has a structure that can be delivered to the lateral anchor (40).

<6.1> Shock absorber of side stay rope

A shock absorber 35 is interposed in a part of the side stay rope 24 , and when the tension exceeds a predetermined value, the shock absorber 35 operates to attenuate the tension of the side stay rope 24 .

The shock absorber 35 may be the friction sliding shock absorber 30 described above, or the shock absorber 30 of the plastic deformation type.

In addition, the shock absorber 35 of the side stay rope 24 is not essential, and when a shock absorbing fence is for a small-scale use, the shock absorber 35 may be abbreviate|omitted.

<6.2> Relationship between the upper and lower side ropes and the shock absorbers provided on the side stay ropes

When the shock absorber 35 is provided in the side stay rope 24, the shock absorber 30 provided in the upper and lower ropes 21 and 22 and the shock absorber 35 provided in the side stay rope 24 are operated The starting force is not the same.

The operation starting force of the shock absorber 35 provided on the side stay rope 24 is set to be larger than the operation starting force of the shock absorber 30 provided on the upper and lower ropes 21 and 22 .

For example, if both shock absorbers 30 and 35 are of the friction sliding type, the gripping force of the side stay ropes 24 is increased with respect to the gripping force of the upper and lower side ropes 21 and 22 .

<6.3> Reason for providing a difference in the starting force of the shock absorber

The difference in the operation starting force of both shock absorbers 30 and 35 is to precede operation of the shock absorber 30 provided on the upper and lower ropes 21 and 22 at the time of water hammer, and the shock force at the time of water hammer In order to transmit to the lateral anchor (40).

[Capture action of shock absorption fence]

The capturing action of the shock absorbing fence will be described with reference to FIG. 3 showing the shock absorbing fence before water hammer and FIG. 4 showing the shock absorbing fence at the time of water hammer.

In the following description, in order to facilitate understanding, the plurality of struts 10 are indicated as struts _{10 1} to 104 from the left direction in the same figure to the right direction, and the upper side rope 21 is From the left direction of the drawing to the right direction, the upper side rope (21 _{1 ~} 214) is marked, and the load transmission rope 23 is also a load transmission rope (23 ₁ ~ 23 ₄ ) from the left direction to the right direction of the same drawing It is indicated and explained.

1. Shock absorbing fence before water hammer (Fig. 3)

Before the water hammer, each upper side rope 21 ₁ to 21 ₄ taut between the upper parts of each post 10 ₁ to 10 ₄ holds the upper interval of each adjacent post 10 ₁ to 10 ₄ . )do. Each load transfer rope 23 ₁ to 234 ₄ having a sagging does not function to hold the upper gap of each post 10 ₁ to 10 ₄ .

2. Shock absorption fence at the time of water hammer (Fig. 4)

<1> Bending deformation of protection net

When a falling object W such as a rockfall collides with a part of the protection net 20 (eg, between the poles 10 ₃ and 10 ₄ ), the protection net 20 bends to the bone side and deforms, and the protection net 20 ) absorbs a part of the impact energy of the falling object (W) by the buffer action.

<2> Transmission of the longitudinal force of the prop

The shock absorbing fence of the present invention transmits the shock load to the shock absorber 30 of the water hammer span (S ₃ ) by using the sagging of the load transmission ropes 23 ₂ , 23 ₁ of the non-water hammer span.

Hereinafter, a transmission route of the impact force acting on the water hammer span S ₃ will be described.

When the protection net 20 is deformed to the bone side, a pair of posts (10 ₃ , 10 ₄ ) located in the water hammer span (S ₃ ) approach each other with a hardness force and a hardness force toward the bone side (both hardness forces) is collectively referred to as “hardness force”) acts.

In this example, for easy understanding, the behavior of the left half of the shock absorbing fence applied by the longitudinal force in the approach direction of the posts 10 ₃ , 10 ₄ will be described, and the right half of the shock absorbing fence will be described. ) is the same as that of the left side, so a description thereof will be omitted.

<2.1> Load transfer through the load transfer rope and side stay rope

The hardness force of the post (10 ₃ ,10 ₄ ) located in the water hammer span (S ₃ ) is the load transfer rope (23 ₂ ) located in the non-water hammer span (S ₂ ,S ₁ ) converted from the relaxed state to the tension state 23 ₁ ) is transmitted to the terminal post (10 ₁ ) via the terminal post, and is finally supported by the lateral anchor (40) via the lateral stay rope (24).

<2.2> Limited sliding of upper side rope of non-water hammer span and limited hardness of strut

When the hardness force of the posts (10 ₃ , 10 ₄ ) located in the water hammer span (S ₃ ) is transmitted to the lateral anchors 40 , the shock absorber 30 provided in the non-water hammer span (S ₂ , S ₁ ) operates. The upper side ropes 21 ₂ , 21 ₁ of the non-water hammer span S ₂ , S ₁ accompany it slide limitedly to absorb a part of the tension.

As the shock absorber 30 of the non-water hammer span S ₂ , S ₁ operates, each strut 10 ₂ , 10 ₁ of the non-water hammer span S ₂ , S ₁ is limited toward the water hammer span S ₃ . incline to

With the sliding of the upper side rope (21 _{2,21 1} ) located in the non-water hammer span (S ₂ ,S ₁ ) and the hardness of each post (10 ₂ , 10 ₁ ), the non-water hammer span (S ₂ ,S ₁ ) The sagging of the load transfer ropes (23 ₂ , 23 ₁ ) is gradually reduced.

When the sagging of each load transfer rope (23 ₂ , 23 ₁ ) is completely lost and becomes a tension state, the operation of the shock absorber 30 provided in the non-water hammer span (S ₂ , S ₁ ) and the non-water hammer span (S ₂ ) ,S ₁ The hardness of each post (10 ₂ ,10 ₁ ) is stopped.

Each load transfer rope (23 ₂ , 23 ₁ ) converted into a tension state constantly maintains the spacing between the heads of each post (10 ₂ , 10 ₁ ) located in the non-water hammer span (S ₂ , S ₁ ).

In this way, in the case of water hammer, the load transfer rope 23 ₂ , 23 ₁ of the non-water hammer span (S ₂ , S ₁ ) obtains a reaction force from the lateral anchor 40, and is located in the non-water hammer span (S ₂ , S ₁ ) Sliding and non-water hammer span (S ₂ , S ₁ ) of the upper side rope (21 2,21 ₁ ) to limit the hardness of the post ( ₁₀ 2,10 ₁ ) located in _a certain range.

<2.3> Shock absorption action in water hammer span

While the sagging of the load transmission ropes 23 ₂ , 23 ₁ located in the non-water hammer span S ₂ , S ₁ is eliminated, the load transmission rope 23 ₃ located in the water hammer span S ₃ remains slack. .

Therefore, the upper and lower side ropes ₂₁₃ and 22 located in the water hammer span S ₃ deform to the bone side, and the tension thereof increases.

When the tension of the upper and lower ropes 213 , ₂₂ located in the water hammer span S ₃ exceeds a predetermined value, the shock absorber 30 provided in the water hammer span S ₃ operates.

As such, in the case of water hammer, only the shock absorber _{30 provided in the water hammer span S 3 operates} according to the increase in the tension of the upper and lower ropes 213 , 22 located in the water hammer span S ₃ , and the falling object W Efficiently absorb the impact energy of

3. Shock-absorbing performance of the fence

<1> When the shock absorber works

At the time of water hammer, the plurality of shock absorbers 30 provided in the water hammer span S ₃ and the non-water hammer span S ₂ , S ₁ and the shock absorbers 35 provided in the side stay rope 24 do not operate simultaneously. .

The operation timing of each shock absorber 30 and 35 at the time of water hammer is summarized as follows.

Immediately after the water hammer, the shock absorber 30 provided in the water hammer span S ₃ does not operate, and the shock absorber 30 provided in the non-water hammer span S ₂ , S ₁ operates limitedly.

After that, the load transfer ropes 23 ₂ , 23 ₁ of the non-water hammer spans S ₂ , S ₁ are switched from a state with sagging to a tension state, so that the shock absorbers of the non-water hammer spans S ₂ , S ₁ ) 30 stops the operation, and instead the shock absorber 30 provided in the water hammer span S ₃ operates.

Since the shock absorber 35 provided on the side stay rope 24 has a larger operation starting force in advance compared to the shock absorber 30 provided on the upper side rope 21, the water hammer span S ₃ or the non-water hammer span Before the operation of the shock absorber 30 provided in (S ₂ , S ₁ ), the shock absorber 35 provided in the side stay rope 24 does not operate.

The shock absorber 35 provided on the side stay rope 24 operates when the tension of the side stay rope 24 exceeds the operation starting force of the shock absorber 35 .

<2> Load transfer time and transfer speed

Since there is sagging in the load transmission ropes 23 ₂ , 23 ₁ , the hardness force of the posts 10 ₃ , 10 ₄ of the water hammer span S ₃ , the load transmission rope of the non-water hammer span S ₂ ,S ₁ ) (23 ₂ , 23 ₁ ) It takes a certain load transfer time until supported by the side anchor 40 via the side stay rope 24 and.

The non-water hammer span (S ₂ , S ₁ ) of the load transfer rope (23 ₂ , 23 ₁ ) has a sagging, thereby reducing the transmission speed of the load through the load transfer rope (23 ₂ , 23 ₁ ).

<3> About the operating time of the shock absorber of the water hammer span

In this way, a predetermined time (load transmission time) is taken until the load is transmitted to the upper _- change rope 213 of the water hammer span (S ₃ ), and by the reduction of the transmission speed of the load, the water hammer span (S ₃ ) The operation time (shock absorption time) by the shock absorber ₃₀ provided on the upper change rope 213 of the becomes long.

Therefore, the deformation time of the upper change rope ₂₁₃ and the protection net ₂₀ in water hammer span S3 can be lengthened.

<4> About the maximum impact force

As described above, as the shock absorption time (deformation time) in the water hammer span S ₃ becomes longer, the maximum impact force that is the peak of the impact force loaded by the water hammer span S ₃ decreases.

By being able to reduce the maximum impact force, the load burden of each material such as the post 10 and the upper and lower ropes 21 and 22 constituting the shock-absorbing fence is reduced, and the material cost of the shock-absorbing fence can be significantly reduced. have.

In addition, in addition to being able to reduce the maximum impact force, it is also possible to cope with rockfall energy that somewhat exceeds the design condition (assumed), so compared with the conventional shock absorbing fence, safety is increased, and the effect of mitigation is remarkably improve

4. About the change of the fence height of the shock absorbing fence

<1> Fence height change of water hammer span

In the water hammer span (S ₃ ), since the struts (10 ₃ , 10 ₄ ) are inclined inward, the protection net (20) in the water hammer span (S ₃ ) according to the hardness of the struts (10 ₃ , ₁₀₄ ) Although the height of the fence is changed low, since the free hardness of the posts (10 ₃ , 10 ₄ ) is limited to a certain range by obtaining a reaction force with the lateral anchors (40), the fence of the protection net (20) located in the water hammer span (S ₃ ) There is no such thing as an extremely low change in height.

<2> Fence height change of non-water hammer span

If the shock absorbing fence has a structure that allows the free hardness of each strut (10 ₁ ~ 10 ₄ ), not only the fence height of the water hammer span protection net is greatly reduced, but also the The fence height is greatly reduced.

On the other hand, in the present invention, the free hardness of each strut ( _{10 1} to 104) in the shock-absorbing fence is limited to a certain range, and each strut (10 ₁ to ₁₀₄ ) does not have unlimited hardness.

Therefore, the hardness of the struts _{10 3} , 104 located in the water hammer span S ₃ is the largest, and the longitudinal angle gradually decreases toward the pole 10 ₁ which is a terminal strut.

In this way, since it is possible to suppress the free hardness of the post (10 ₂ , 10 ₁ ) located in the non-water hammer span (S ₂ , S ₁ ) small, the protection net 20 in the non-water hammer span (S ₂ , S ₁ ) ), the required height of the fence can be secured under the design conditions.

Accordingly, it is possible to ensure the capture performance of the subsequent falling object W' by the protection net 20 located in the non-water hammer span S ₂ , S ₁ .

5. Repair work on the shock-absorbing fence

The shock-absorbing fence of the present invention can control the operation of the plurality of shock absorbers 30 and 35 at the time of water hammer, and finally, the protection net 20 located in the water hammer span S ₃ , the water hammer The upper and lower side rope materials 21 and 22 located in the span (S ₃ ) and the shock absorber 30 located in the water hammer span (S ₃ ) cooperate to absorb impact energy.

Therefore, in the case of repairing the shock-absorbing fence after a rockfall, the protection net 20 located in the water hammer span (S ₃ ) is renewed, and the upper and lower side rope materials ( 21 , 22 ) and the shock absorber of the water hammer span ( S ₃ ) The shock absorbing fence can be repaired within a short time with a simple operation of restoring (30) to its original state.

[Another embodiment]

The present invention is not limited to a logarithmic shock absorbing fence in which the upper and lower sides of the protective net 20 are supported on the upper and lower portions of the post 10, and can be applied to various known shock absorbing fences.

Figure 5 (A) is a algebraic shock absorption in which the upper side of the protection net 20 is supported on the upper part of the post 10, and the lower side of the protection net 20 is fixed and supported by the mountain anchor 41 on the slope side. indicates a fence.

Fig. 5(B) shows a pocket-type shock-absorbing fence in which the upper side of the protection net 20 is supported at the upper part of the post 10, and the lower side of the protection net 20 is arranged on the oblique bone side.

The shock-absorbing fence of this example is only different in the arrangement position of the lower side of the protective net 30, and since it is the same as the previous embodiment with respect to the other structure and a buffer action, the description is abbreviate|omitted.

In this example, it can be applied to various shock absorption fences, and it is rich in versatility.

10… landlord
10a… middle pole
10b… terminal holder
20… protective net
21… upper side rope
22… lower side rope
23… load carrying rope
24… side stay rope
30… Shock Absorber for Up and Down Rope
35… Shock absorbers for side stay ropes
W, W'… falling object

Claims (7)

A plurality of poles consisting of an intermediate pole and a terminal pole, an upper-variant rope taut between the upper parts of adjacent struts independently in units of spans of the poles, and a portion of the upper-variant rope, wherein a certain amount of tension is applied to the upper-variant rope In the shock-absorbing fence having a shock absorber for damping the tension of the lower surface, and a protective net in which the upper side is supported on the upper side rope,
A plurality of load-transmitting ropes transversely spanning between the upper parts of neighboring posts, independently in units of spans of the posts,
and a side stay rope connected between the upper part of the terminal post and the side anchor,
Shock absorbing fence, characterized in that the load transfer rope has a greater sag than the upper side rope and spanned horizontally between the upper parts of the neighboring posts. The method of claim 1,
When the slack of the load transmission rope of the non-water hammer span is lost when the water hammer supports the longitudinal force of the prop located in the water hammer span with the lateral anchor via the load transmission rope and the side stay rope of the adjacent non-water hammer span Shock absorbing fence, characterized in that it is configured to support the hardness of the post located in the water hammer span through the load transfer time. 3. The method according to claim 1 or 2,
A shock absorbing fence, characterized in that a shock absorber is interposed in a part of the side stay rope. 4. The method of claim 3,
The shock absorbing fence, characterized in that compared to the operation starting force of the shock absorber of the upper change rope is in a large relationship compared to the operation starting force of the shock absorber of the side stay rope. 5. The method according to any one of claims 1 to 4,
Shock absorbing fence, characterized in that the algebraic formula supporting the lower side of the protective net to the lower part of the post. 5. The method according to any one of claims 1 to 4,
Shock absorption fence, characterized in that the structure supported by fixing the lower side of the protection net to the slope side. 5. The method according to any one of claims 1 to 4,
A shock-absorbing fence, characterized in that the shock-absorbing fence is of a pocket type in which the lower side of the protective net is arranged on the trough side.

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