JP2002363921A - Shock absorbing fence, and shock absorbing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide shock absorbing technique capable of achieving high shock absorbing performance, and restricting overhang quantity sideways in receiving shock. SOLUTION: This device comprises columns 20 vertically provided at a specified interval from each other, and plural protective loops 30 of rope material of such a length that can be wound between the columns 20 and 20 held by a shock absorbing member 40 close to end parts of it to leave excessive length parts 31 and 31. The protective loops 30 are horizontally wound between the columns 20 and 20 in multiple stages.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impact absorbing fence and an impact absorbing method for absorbing an impact force such as falling rocks, avalanches, landslides and the like.

[0002]

2. Description of the Related Art A shock absorbing fence has as its basic components a pillar standing upright on a slope at a predetermined distance and a rope protection net suspended between these pillars, and is formed by the deformation force of the protection net. "Non-slip type" that absorbs impact force,
It can be broadly classified into "slip type", which absorbs impact by sliding resistance using a friction resistance type shock absorber. The slip type has a form in which a shock absorber e is provided at the intersection of the ropes d crossed as shown in FIG. 11 and a horizontal rope g straddling a plurality of shock absorbers e provided on each support f as shown in FIG. And the form in which both ends of the horizontal rope g are gripped by the shock absorber e for each column f, as shown in FIG.

[0003]

The conventional shock absorbing fence has the following problems. <B> The non-slip type not only has a lower impact absorbing performance due to the protective net than the slip type, but also requires a large and heavier fence to be designed, resulting in a high impact absorbing cost. <B> Due to the large amount of deformation of the protective net during non-slip, the use of the slip type will not be adopted when the fence installation site approaches various transportation facilities (roads and railways) or houses. , Installation site is limited.
Further, since a large number of shock absorbers are used, it takes a lot of trouble and time to install the shock absorbers and grip the rope. <C> As a difficulty common to both types, since the protective net is single-layered and the usable rope diameter is limited, the receiving performance cannot be significantly improved.

The present invention has been made in view of the above points, and an object of the present invention is to provide the following shock absorbing technology. Shock absorption technology that can demonstrate high shock absorption performance. Shock absorption technology that can suppress the amount of protrusion to the side during a strike. Shock absorption technology with excellent workability.

[0005]

In other words, the invention according to the first aspect of the present invention is to provide a shock absorber for supporting a column which is erected at a predetermined interval and near the end of a rope material having a length which can be wound around the column. A shock-absorbing fence comprising a plurality of protection loops having a buffering function gripped in a manner, wherein the protection loops are wound around the support posts in a multi-stage manner. The invention according to claim 2 is a shock absorber with a plurality of pillars erected at predetermined intervals and near the end of a rope material having a length that can be wound between adjacent pillars, leaving an extra length. A shock absorbing fence comprising a plurality of protective loops formed by being gripped with a support pillar, wherein the protective loops are chained around adjacent support columns while sharing a support column, and are horizontally mounted. The invention according to claim 3 is the shock absorbing fence according to claim 1 or 2, wherein the protective loop has a rope length that can be wound around the support posts a plurality of times. According to a fourth aspect of the present invention, there is provided a protective loop in which an extra length is formed near the end of a rope material having a length that can be wound between columns erected at predetermined intervals, and the extra length is formed with a shock absorber. The shock absorbing method is characterized in that a shock is absorbed by a buffering action of a protection loop wrapped around the support and horizontally, and a sliding resistance between the protection loop and the support.

[0006]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

<A> Configuration of Shock Absorbing Fence FIG. 1 is a perspective view of a partially broken shock absorbing fence 10,
FIG. 2 shows a plan view thereof. Shock absorbing fence 10 according to the present invention
Is a plurality of pillars 20 erected at predetermined intervals, a protective loop 30 wrapped around these pillars 20, 20, and a frictional shock absorbing buffer gripping near the end of the protective loop 30. Tool 40.

<B> Supports The support 20 is, for example, a steel pipe, a concrete-filled steel pipe, a concrete pillar, an elastic support, or the like, to which various known materials can be applied. The cross-sectional shape of the column 20 is not particularly limited. However, in the shock absorbing fence of the present embodiment, as will be described later, the protective loop 30 slides while abutting on the side surface of the column 20 when receiving an impact. The predetermined surface may be formed as a rounded arc surface. To prevent the protective loop 30 from slipping down,
Protrusions or depressions are provided on the side surfaces of the support 20. Further, the lower portion of the 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 tiltable by adopting a hinge structure. Although not shown, various stay ropes are obliquely arranged between the upper part of the support 20 and the slope side. In this case, it is desirable to interpose a frictional resistance type shock absorber at the end or middle of the stay rope.

<C> Protective loop The protective loop 30 is made of, for example, PC steel wire, P
With a rope material such as a steel wire from C, the overlapped portion near both ends of the rope material is gripped by the shock absorber 40 to form a loop shape, and each of the extra length portions 3 is located in a range beyond the gripping position of the shock absorber 40.
1, 31 are formed. A stopper 32 is provided at the end of the rope material to prevent the rope material from coming out of the shock absorber 40. Extra length 3
The sliding length of the multiplex rope 30 is determined by the set lengths of 1, 31. The length of the rope material constituting the protective loop 30 has a length that can be wound around the posts 20, 20;
In other words, the length of the support posts 20, 20, including the length of the support posts 20, 20 wrapped around the support posts 20, 20, is at least twice the standing interval of the support posts 20.
The length is set to a length that can secure the extra length portions 31, 31 of a predetermined length when wound around.

[0010] The protective loop 30 is connected to each of the adjacent columns 20,2.
The protective loop 30 is wound so that there is no slack in the horizontal direction between 0 and the protective loop 30 can slide on the side surface of the support 20 when receiving a shock. If the same level of shock absorption performance as that of a conventional fence in which one rope material is laid between supports is ensured, the rope materials constituting the protective rope 30 are arranged in multiple layers, and the force in the loop formation range is increased. Can be transmitted and dispersed, so that the diameter of the rope material constituting the protection loop 30 can be designed to be small. When there are three or more columns 20, the protective loops 30, 30 are wound around the columns 20 located between the terminal columns from both directions except for the columns of the terminals.
The protection loops 30 are wrapped in a chain so as to be laterally mounted so that each support 20 has a shared relationship with the left and right protection loops 30, 30. The intervals at which the protection loops 30 are arranged in the vertical direction are appropriately selected and determined so as to restrict the transmission of falling rocks, avalanches, and the like.

<D> Shock Absorber The shock absorber 40 grips the overlapped portion of the protective loop 30, and allows the rope material to slide when the tensile force acting on the protective loop 30 exceeds the frictional resistance of the gripped portion. It is a device that attenuates the impact force. As the shock absorber 40, for example, the protection loop 3
A frictional resistance type shock absorber consisting of a plurality of plate members capable of gripping the overlapping portion of 0 and bolts capable of fastening between these plate members can be used. Can be used.

In the present invention, the protective loop 30 wound around the support 20 is provided with one shock absorber 40. Therefore, as shown in FIGS. e compared to the shock absorbing fence provided with
Can be used less.

[0013]

Next, a description will be given of the shock absorbing action when various impact forces F act on the shock absorbing fence 10 from above to below in FIG.

The impact force F acting on the front surface of the protective loop 30 (the side on which the shock absorber 40 is not provided) is transmitted to the rear surface of the protective loop 30 (the side on which the shock absorber 40 is provided) through a portion wound around the column 20. , Acts as a uniform pulling force over the entire length of the protective loop 30. As long as the pulling force does not exceed the gripping force of the shock absorber 40 of the protection loop 30, sliding does not occur on the rope material, and therefore the loop length of the protection loop 30 does not change.

The adjacent protective loops 30, 30 are
The impact force F is transmitted to the protection loop 30 and the strut 20 where the impact force F does not directly act, and is dispersed by the plurality of protection loops 30 and the plurality of struts 20. Supported.

When the impact force F exceeds the gripping force of the shock-absorbing device 40, it slides (slip) between the rope material constituting the protection loop 30 and the shock-absorbing device 40, and the impact force F due to frictional resistance during sliding. Effectively attenuate. With the start of the sliding between the rope material and the shock absorber 40, the loop length of the protection loop 30 becomes longer, and the sliding occurs at the winding portion between the protection loop 30 and the side surface of the column 20. The damping effect of the impact force F also progresses due to the frictional resistance of the winding portion. The two damping (buffering) effects of the protective loop 30 described above are due to the extra length 3
This is possible until the stoppers 32 abut against the shock absorber 40 when the lengths of the stoppers 1 and 31 are shortened.

Further, as will be described later, the impact absorbing fence 10 according to the present invention requires only a small amount of protrusion of the protective loop 30 to the side.

FIG. 3 is a model diagram of a single type contrasting shock absorbing fence in which one end is fixed to each support and a rope material is arranged, and the center of the overlapping portion of both rope materials is gripped by a buffer (not shown). In the figure, (A) shows a state before receiving, and (B) shows a state after receiving. The distance L between the columns is, for example, 6 m, and the distance l of the extra length of the rope material is 0.
If a 5 m, bulging amount [Delta] y ₁ rope material after受撃becomes 1.25 m.

FIG. 4 is a model diagram of the shock absorbing fence according to the present invention in which a protective loop is stretched between the columns, and FIG. 4A shows a state before receiving a shock, and FIG. ) Indicates the state after receiving. Distance L, for example, 6m between struts, and the distance l of extra length portion of the rope material was changed to 0.5 m, bulging amount [Delta] y ₂ rope material after受撃becomes 0.875 m. However, in order to simplify the calculation, the length of the wrap portion of the protective loop was ignored.

In the case where the sliding amount (energy absorption amount) is the same, the amount of overhang of the rope material is smaller in the protection loop 30 than in the case of the present invention, and when the shock absorbing fence 10 is installed near a road or the like. Is advantageous. Further, the shock absorbing fence 10 according to the present invention not only can reduce the diameter of the rope material, but also has an advantage in shear strength as compared with the single type.

[0021]

Embodiment 2 Hereinafter, another embodiment will be described. In the description, the same parts as those in the above-described first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 5 shows a protective loop 30 between the columns 20, 20.
Another embodiment is shown in which is arranged in an eight-shape in a plane and is wound. In this example, the winding angle (wrapping length) of the protection loop 30 with respect to the support post 20 is longer than that in the first embodiment, so that the sliding resistance at the time of receiving is increased and the shock absorbing performance is improved. it can.

As shown in FIG. 6, when the protection loop 30 is wound around the support 20 once or plural times around the entire circumference, the sliding resistance between the protection loop 30 and the support 20 is increased, and the shock absorbing performance is further improved. it can.

[0024]

Third Embodiment FIG. 7 shows another embodiment using a protective loop 30 having a length at which the rope material can be wound twice or more at the same height between the columns 20, 20.

FIG. 8 shows another embodiment in which the rope material constituting the protective loop 30 is wound twice or more in a zigzag manner along the longitudinal direction of the columns 20, 20.

In the shock absorbing fence shown in FIGS. 7 and 8, a point near the end of the protective loop 30 is gripped by the shock absorber 40,
The formation of the extra-length portions 31, 31 is the same as in the above-described embodiment.

In this embodiment, the dispersion of the impact force is improved by the increase in the number of times the protective loop 30 is wound.

[0028]

Fourth Embodiment FIG. 9 shows a protection loop 30, 30,.
... shows another embodiment in which a vertical connecting cable 50 is additionally attached so as to intersect with. It is sufficient that the vertical connecting cords 50 are arranged and formed in a lattice shape only on one side which is a receiving surface of the shock absorbing fence.

For the vertical connecting cable 50, for example, a chain or a rope material can be used. When a chain is used for the vertical connecting cable 50, each protection loop 30
And insert the chain into each protective loop 30, 3
It is used as a member for preventing the opening of 0 ... When a rope material is used for the vertical connecting cable 50, a frictional resistance type buffer (not shown) is attached to the intersection of the vertical connecting cable 50 and each of the protective loops 30, 30,. 30 ...
.. Can not only prevent the opening, but also exhibit a buffering effect due to frictional sliding at the intersection, and can provide a high-performance shock absorbing fence.

[0030]

Fifth Embodiment FIG. 10 shows a structure in which projections 21 for winding are provided on one side of columns 20, 20 in multiple stages, and a protective loop 30 is wound between these adjacent projections 21, 21. Another embodiment is shown. In this example, a case where one protection loop 30 is wound around one protrusion 21 is shown.
The projections 21 may be shared by winding the projections 30 together.

Further, it is desirable to arrange the protection loop 30 on the side of the support 20 facing the receiving direction so that the protection loop 30 does not come off when receiving, or to form the tip of the projection 21 by bulging. .

[0032]

[Embodiment 6] In the above, the case where the overlapped portions near both ends of the rope material are gripped by the shock absorber 40 and the extra length portions 31, 31 are formed on both rope materials has been described. While fixing one end to the shock absorber 40 in a non-sliding state,
In some cases, the buffer member 40 grips the vicinity of the other end of the other end of the rope material to form only one extra-length portion 31.

[0033]

According to the present invention, the following effects can be obtained. <A> Since a protective loop having a cushioning function is wound between the columns, the dispersibility of the impact force and the shear strength can be improved, and a shock absorbing fence having high shock absorbing performance can be provided. <B> Compared to a fence in which a flat protective net is arranged, the amount of overhang of the protective loop can be reduced, which is advantageous when installing on a site where the amount of overhang is limited, such as at the side of a road. <C> Since the number of buffers used is small, the time, labor, and economic burden required for the construction of the fence can be significantly reduced. <D> Since the dispersion performance of the impact force increases in proportion to the number of windings of the protective loop, the shock absorption performance of the entire fence can be dramatically improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a shock absorbing fence according to Embodiment 1 of the present invention.

FIG. 2 is a plan view thereof.

FIG. 3 is a model diagram for explaining the amount of overhang of the rope material of the comparison fence, where (A) is a model diagram before receiving, and (B) is a model diagram after receiving.

FIGS. 4A and 4B are model diagrams for explaining the amount of overhang of the protective loop according to the present invention, wherein FIG.
Is the model after the shot

FIG. 5 is an explanatory view of a form in which another protective loop in which a rope material is wrapped between pillars at 8 o'clock.

FIG. 6 is an explanatory diagram of a winding form of another protective loop in which a rope material is wound around a support.

FIG. 7 is an explanatory view of a winding form of another protective loop in which a rope material is wrapped between supports in a multiplex manner.

FIG. 8 is an explanatory view of a winding form of another protective loop in which a rope material is wound in a zigzag manner between supports.

FIG. 9 is a perspective view of a shock absorbing fence according to another embodiment in which connecting ropes are arranged so as to intersect with a protective loop and are formed in a net shape.

10A and 10B are explanatory views according to another embodiment in which a protective loop is laterally mounted on one side of a column, where FIG. 10A is a plan view of a shock absorbing fence with a part thereof omitted, and FIG. Front view

FIG. 11 is an explanatory diagram of a protective net based on the present invention.

FIG. 12 is an explanatory view of a shock absorbing fence based on the present invention.

FIG. 13 is an explanatory view of another shock absorbing fence based on the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Shock absorption fence 20 Prop 30 Protective loop 31 Extra length 32 Stopper 40 Shock absorber 50 Vertical connecting cable

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Minoru Kazuo 13-33 Minami-Taikoyama, Kosugi-cho, Imizu-gun, Toyama (72) Inventor Masaki Shiomi 2-24-14 Higashi-Nihonbashi, Chuo-ku, Tokyo Japan Zenith Pipe Co., Ltd. F Terms (Reference) 2D001 PA05 PA06 PB04 PD05

Claims (4)

[Claims] A plurality of supporting loops having a buffering function, wherein the supporting columns are provided to stand up at predetermined intervals and have a buffering function near an end of a rope member having a length that can be wound between the supporting columns. A shock absorbing fence, wherein the protection loop is wound around the support column in multiple stages and is horizontally mounted. 2. A plurality of pillars erected at predetermined intervals and a portion of the rope material having a length that can be wound between adjacent pillars is gripped by a buffer with an extra length remaining. A shock absorbing fence comprising a plurality of protective loops formed by forming a protective support loop, wherein the protective loops are chained around adjacent support columns while sharing a support column. 3. The shock absorbing fence according to claim 1, wherein the protective loop has a rope length capable of being wound around the support column a plurality of times. 4. A protection loop is formed by forming a surplus portion near the end of a rope material having a length that can be wound between columns erected at a predetermined interval and holding it with a shock absorber. A shock absorbing method, wherein a shock is absorbed by a buffering action of a protection loop wrapped around the support and horizontally, and a sliding resistance between the protection loop and the support.