JP2001348818A - Shock absorbing fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shock absorbing fence preventing a force in a moving direction of a column from acting on the column and capable of maintaining the installed height of the shock absorbing fence even after a colliding object collides with the shock absorbing fence. SOLUTION: This shock absorbing fence is composed of the column 1 erected at an interval, lateral rope materials 22 tensioned in the inter-column direction, longitudinal rope materials 21 tensioned in the almost orthogonal direction to the lateral rope materials and a net-like material 3 tensioned between the lateral rope materials. It is characterized in that the longitudinal rope materials and the lateral rope materials are connected, a rotary body 12 is installed on the column, the longitudinal rope materials are arranged in the rotational direction of the rotary body, and are installed in a mooring tool arranged on the ground.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorbing fence for absorbing the impact of a collision object. In particular, the present invention relates to a shock absorbing fence suitable for use as a pocket-type rock fall prevention fence.

[0002]

2. Description of the Related Art Conventionally, in a pocket type rock fall prevention fence a or the like,
One end of the mountain side rope material f in the slope direction on the mountain side is anchored at one end.
And the other end was attached to the support b. Also,
One end of the valley-side rope material g on which the wire mesh is provided is also attached to the column b. Here, a slidable shock absorber may be attached in the middle of the rope material (f, g) to form an impact absorbing fence that absorbs impacts such as falling rocks. FIG. 5 shows a sectional view of a conventional pocket-type rock fall prevention fence.

[0003]

The above-mentioned conventional pocket-type rock fall prevention fence or impact absorption fence has the following problems. <B> When a rock falls into the wire net, the impact is transmitted directly to the support via the rope material. For this reason, it is necessary to make the column and its foundation sufficiently strong. <B> When the cushioning material is interposed in the middle of the rope material, the impact transmitted to the column is reduced. However, since the impact is not completely eliminated, it is necessary to strengthen the column and its foundation. <C> Even when the support and its foundation are made strong, the support may be moved to the valley side by being pulled by the rope material. As a result, the height of the upper end of the wire mesh is reduced, and there is a risk that falling rocks jump over the wire mesh.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a shock absorbing fence in which a force in a direction in which a column moves is hardly applied to the column. . Another object of the present invention is to provide a shock absorbing fence that can maintain the height of the shock absorbing fence at the time of installation even after a collision object collides. The present invention achieves at least one of these objects.

[0005]

In order to achieve the above object, a first aspect of the present invention is to provide a column which is erected at intervals, a horizontal rope member which is stretched in the direction between columns, and It consists of a vertical rope material stretched in a direction substantially perpendicular to the horizontal rope material, and a mesh material stretched between the horizontal rope materials, and connects the vertical rope material and the horizontal rope material, and attaches a rotating body to the support. The shock absorbing fence is characterized in that the vertical rope material is arranged along the rotation direction of the rotating body and is attached to a mooring tool installed on the ground. In addition, the second invention is characterized in that the pillars stand at intervals, a horizontal rope material stretched in the direction between the pillars, a vertical rope material stretched in a direction substantially orthogonal to the horizontal rope material, And connecting the vertical rope material and the horizontal rope material, passing the vertical rope material through an insertion hole formed in the support, and attaching the vertical rope material to a mooring device installed on the ground. It is a shock absorbing fence. Here, in the first and second inventions described above, the vertical rope material can be attached to a mooring device installed on the ground via a slidable end buffer. Further, a diagonal rope material for connecting the horizontal rope materials, wherein both ends of the diagonal rope material are attached to the horizontal rope material, and an intermediate portion thereof is located below the horizontal rope material to which the end is attached. It is also possible to arrange a diagonal rope material attached to the material.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

<A> Overall Configuration The shock absorbing fence 10 includes, for example, a column 1 standing at an interval in a direction substantially perpendicular to a slope surface, a horizontal rope member 22 stretched in a direction between columns, and the horizontal It is composed of a vertical rope material 21 stretched in a direction substantially orthogonal to the rope material, and a mesh material 3 stretched between the horizontal rope materials.

<B> Support The support 1 may be a known support used for a rockfall prevention fence, such as a cylindrical or prismatic steel pipe, steel, H-shaped steel, or angle steel. The rotating body 12 is attached to, for example, the upper end of the column 1. As the rotating body 12, a pulley or a roller can be used. For example, the lower half of the rotating body 12 is inserted into the column, and the shaft of the rotating body is supported at the upper end of the column. When using a pulley, it is desirable to make the depth of the groove deeper than the rope material to be arranged. In addition, in order to prevent the rope material disposed on the rotating body 12 from falling off, a known falling-off preventing material (not shown) may be installed outside the rotating body. The rotating body 1
2 can also be attached in the middle of the column or near the lower end. The lower end of the column 1 is fixed to the slope by a known method such as an anchor or a concrete foundation. Note that it is also possible to fix the support 1 by attaching the support rope material 23 to the support 1. The support rope member 23 can also be moored to the mooring device 5 for mooring the vertical rope member 21 described below. In this case, there is no need to separately install a mooring device for mooring the support rope material 23. FIG. 2 shows a plan view of the shock absorbing fence 10. Prop 1
Is used to secure the height of the shock absorbing fence 10.

<C> Vertical rope material The vertical rope material 21 is, for example, a wire rope stretched in the direction of the slope. The mountain-side end of the vertical rope material 21 is moored to the mooring tool 5 via the end buffer 41. Note that the vertical rope material 21 is directly attached to the mooring device 5 without using the end cushioning device 41.
It can also be moored. A known lock anchor or the like is used for the mooring tool 5. The end cushioning member 41 is a vertical rope material 2
1 is a metal fitting that slides and absorbs energy when a tensile force is generated. For example, a well-known shock-absorbing device in which a rope material is sandwiched between opposed plate materials can be used. The vertical rope material 21
It is arranged along the rotation direction of the rotating body 12 of the column. For example, when a pulley is used as the rotating body 12, the pulley is arranged along the groove of the pulley.

<D> Horizontal Rope Material The horizontal rope material 22 is, for example, a wire rope or the like that is stretched in the direction between the columns. The direction between the supports refers to a direction in which the supports are arranged, and is a direction substantially orthogonal to the vertical rope material. The horizontal rope material 22 is attached to the vertical rope material 21 by, for example, an intersection buffer 42.
Attach through. The end of the horizontal rope material 22 is fixed to the slope by a mooring tool via, for example, an end buffer. The crossing buffer 42 is a metal fitting that slides and absorbs energy when a tensile force is generated in the rope material. For example, opposing 3
A well-known shock-absorbing device can be used in which the intersecting rope members are sandwiched between the plate members one by one, and the plate members are tightened with bolts. The horizontal rope material 22 can be used as a suspension rope for suspending the mesh material 3. The mesh material 3 is installed to prevent a collision object from passing between the horizontal rope materials 22.

<E> Diagonal rope material The diagonal rope material 24 is a rope material that connects the horizontal rope materials in the vertical direction. FIG. 3 shows a front view of the shock absorbing fence 10 when the oblique rope member 24 is arranged. Diagonal rope material 2
4 are attached to the horizontal rope material 22 via, for example, a parallel buffer 43. Then, the oblique rope material 2 is attached to the lateral rope material located below the lateral rope material to which the end is attached.
4 is attached via a parallel buffer 43. Even if one parallel shock absorber 43 is used to attach the middle part,
One. The shape of the oblique rope material seen from the front view is triangular when one parallel buffer is used in the middle part, and trapezoidal when two parallel buffers are used. Here, the parallel buffer 43 is a metal fitting that slides and absorbs energy when a tensile force is generated in the rope material. For example, a known shock-absorbing device in which the side-by-side rope members are sandwiched between opposing plate members can be used. The oblique rope material 24 tends to become horizontal when a tensile force is generated. As a result, the horizontal rope material to which the intermediate portion of the diagonal rope material 24 is attached is lifted upward, and a change in the height of the horizontal rope material before and after the collision is reduced. When attaching the oblique rope material 24 to the horizontal rope material 22, the parallel buffer 43
Need not be used. Also, it may be used only partially. Even if the parallel shock absorber 43 is not used, the effect of reducing the downward movement of the horizontal rope material can be obtained.

<F> Operation When the colliding object collides with the mesh member 3 of the shock absorbing fence 10, the mesh member 3 and the horizontal rope member 22 are pushed to the valley side. And
A tensile force is generated in the vertical rope material 21 to which the horizontal rope material 22 is connected. Since the rotating body 12 on which the vertical rope material 21 is arranged rotates, almost no trough-side force acts on the column 1. The main force acting on the column 1 is a force in the direction of pressing the column against the slope. The vertical rope material 21 is connected to the mooring device 5 via the end buffer device 41. For this reason, the tensile force generated in the vertical rope material 21 is transmitted to the end buffer 41 without being transmitted to the column. Then, when the vertical rope member 21 slides in the end buffer member 41, the impact transmitted to the vertical rope member 21 is absorbed.

[0013]

[Other Embodiments] Instead of arranging a rotating body at the upper end of a column 1, an insertion hole 11 is formed near the upper end of the column, for example. The insertion hole 11 is a hole that penetrates in a direction substantially orthogonal to the axis of the column. The size of the insertion hole 11 depends on the length of the vertical rope material 21.
Of the vertical rope material 21 so that the vertical rope material 21 can move smoothly inside. It is also possible to reduce the friction between the vertical rope member 21 and the insertion hole 11 by applying a lubricant to the inner surface of the insertion hole 11, installing a roller or a pulley therein, or the like. Note that the shape of the insertion hole 11 can be a shape such as a cylindrical shape or a rectangular tube shape. FIG. 4 shows a perspective view of the shock absorbing fence 10 in which the insertion hole is formed.

[0014]

According to the shock absorbing fence of the present invention, the following effects can be obtained. <A> The vertical rope material and the horizontal rope material are not connected to the support, and the vertical rope material only passes through the rotating body or the insertion hole of the support. Therefore, the impact of the collision object is hardly transmitted in the direction in which the column moves. As a result, the support and the foundation of the support can be simplified. <B> The strut does not move, deform or fall due to the impact received by the rope material. Therefore, the height of the shock absorbing fence can be maintained before and after the collision. As a result, it is possible to prevent a collision object such as a falling rock from jumping over the shock absorbing fence after the collision as in the case before the collision. <C> An oblique rope material for lifting each horizontal rope material upward can be installed. In this case, the horizontal rope material is unlikely to hang down even after the collision. As a result, it is possible to prevent a collision object such as a falling rock from jumping over the shock absorbing fence after the collision as in the case before the collision.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view showing the vicinity of a support in an embodiment of a shock absorbing fence according to the present invention.

FIG. 2 is a plan view of an embodiment of a shock absorbing fence.

FIG. 3 is a front view of the embodiment of the shock absorbing fence to which the diagonal rope material is attached.

FIG. 4 is an enlarged perspective view of the vicinity of a pillar in another embodiment in which an insertion hole is formed in the pillar.

FIG. 5 is a sectional view of a conventional pocket-type rock fall prevention fence.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Prop 10 ... Shock absorbing fence 11 ... Insertion hole 12 ... Rotary body 21 ... Vertical rope material 22 ... Horizontal rope material 24 ... Diagonal rope material 3 ... Net-like material 41 ... End part Shock absorber 42: Cross-section shock absorber 43: Parallel shock absorber 5: Mooring tool

Claims (4)

[Claims] 1. A strut which is erected at intervals, a horizontal rope material stretched in the direction between the pillars, a vertical rope material stretched in a direction substantially orthogonal to the horizontal rope material, and a mesh stretched between the horizontal rope materials. An object, the vertical rope material and the horizontal rope material are connected, a rotating body is attached to the support, and the vertical rope material is disposed along a rotation direction of the rotating body, and the mooring device is installed on the ground. Shock absorbing fence characterized by being attached to 2. A strut strung at intervals, a horizontal rope material stretched in the direction between the pillars, a vertical rope material stretched in a direction substantially orthogonal to the horizontal rope material, and a mesh stretched between the horizontal rope materials. And connecting the vertical rope material and the horizontal rope material, passing the vertical rope material through an insertion hole formed in the column, and attaching the vertical rope material to a mooring device installed on the ground. fence. 3. The shock absorbing fence according to claim 1, wherein the vertical rope material is attached to a mooring device installed on the ground via a slidable end buffering device. 4. An oblique rope material connecting the horizontal rope materials, wherein both ends of the oblique rope material are attached to the horizontal rope material, and an intermediate portion thereof is located below the horizontal rope material to which the end is attached. The shock absorbing fence according to claim 1, wherein an oblique rope material attached to the horizontal rope material is arranged.