JPH0827735A - Shock absorbing clip - Google Patents

Abstract

PURPOSE:To provide high shock absorbing effect and require not so much expense for maintaining a shock absorbing fence. CONSTITUTION:A clip to press the crossing between one rope 51 and the other rope 52 turned back therefrom against a shock absorbing fence has a mainbody 10 provided with mutually opposed press-contact pieces 11, 12 and through-holes 111, 121 penetrating through the respective press-contact pieces, a bolt 20 with the thread portion 22 formed at one end and the wedged head 21 formed at the other end to be put through the press-contact pieces and a nut 30 mounted on the thread portion 22 of the bolt 20. For the mainbody 10, grooves 15, 16 are formed along the press-contact pieces 11, 12 between the press-contact pieces to store ropes 51, 52 therein. For the bolt 20, the thrusting face 211 is formed on the wedged head 21 to slantly press-contact the rope 51 stored in the mainbody 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorbing clip used for a shock absorbing fence such as a rockfall prevention fence or a guide rope.

[0002]

2. Description of the Related Art Conventional shock absorbing fences include rockfall protection fences and guide ropes in which a net such as a wire mesh is stretched around steel columns or a plurality of wire ropes are stretched in parallel between the columns. Are known.

[0003]

Problems to be Solved by the Invention The conventional shock absorbing technology described above has the following problems.

<A> Conventional rockfall prevention fences and guide ropes are a method of absorbing the impact of colliding objects such as rockfalls by utilizing the plastic deformation of columns and the elastic elongation of nets or wire ropes. For this reason, in order to increase the impact absorption rate of the rockfall prevention fence and the guide rope, it is necessary to use a member having high rigidity for the support and use a net or a wire rope having a large tensile strength. Therefore, while the shock absorption rate can be expected to increase, there arises a problem that the cost of the member increases and the workability decreases due to the increase in weight.

<B> Generally, a high impact absorption effect cannot be expected with conventional rockfall prevention fences and guide ropes.

<C> Each time a collision such as a rock fall occurs, the deformed support column must be replaced, and it costs a great deal to maintain and manage the rock fall prevention fence and the guide rope.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems. The object of the present invention is to obtain a high shock absorbing effect and to maintain a shock absorbing fence at a high cost. Not to provide a shock absorbing clip.

[0008]

That is, the present invention is a clip for crimping an intersecting portion formed by rewinding one rope on another rope in a shock absorbing fence and having crimping pieces facing each other. A body having a through hole penetrating the piece, a bolt having a threaded portion formed at one end and a wedge-shaped head portion formed at the other end, and arranged through the respective pressure contact pieces, and a threaded portion of the bolt. The main body is formed with a groove along the press-contact piece so that the rope can be accommodated in the groove, and the bolt is a wedge-shaped head that accommodates the rope accommodated in the main body. It is a shock absorbing clip characterized in that a pressing surface that obliquely comes into pressure contact is formed.

The present invention is also the shock absorbing clip as described above, characterized in that a prism is formed at the end of the screwing portion of the bolt.

[0010]

Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings.

<A> Overall Structure FIG. 1 is a perspective view of a shock absorbing clip 70. The shock absorbing clip 70 includes a clip body 10, a bolt 20, a nut 30, and a washer 40. FIG.
Reference numerals 51 and 52 are ropes, which are members to which the shock absorbing clip 70 is to be crimped. Each part will be described in detail below.

<B> Main Body The main body 10 is a member that has two pressure contact pieces 11 and 12 facing each other, and accommodates the ropes 51 and 52 between them. The main body 10 has a structure in which opposing pressure contact pieces 11 and 12 are connected by a connection piece 13 as shown in FIG. 1 or 2, for example, and a housing port 14 is formed between the pressure contact pieces 11 and 12. The rope 51 to be pressure-contacted from the accommodation opening 14,
52 can be accommodated, and the linear groove 15 and the oblique groove 16 are engraved in the inner portion thereof as shown in FIG. 2 or 3. The straight groove 15 is a groove for accommodating the large-diameter rope 51, and the oblique groove 16 is a groove for accommodating the small-diameter rope 52, and is formed on the back side and obliquely with respect to the linear groove 15. ing. Further, the groove width of the straight groove 15 is set to be substantially the same as the outer diameter of the rope 51, and the groove width of the oblique groove 16 is set to be substantially the same as the outer diameter of the rope 52. Therefore, the rope 51,
The 52 is accommodated in a vertically aligned state without being laterally displaced in the grooves 15 and 16.

As shown in FIG. 1, the press contact pieces 11 and 12 are provided with a long hole 111 for inserting the bolt 20 and a round hole 121, respectively. The round hole 121 is formed in a circular shape slightly larger than the outer diameter of the threaded portion 22 of the bolt 20. On the other hand, long hole 1
Reference numeral 11 is a substantially elliptical hole that matches the outer diameter of the wedge-shaped head portion 21 of the bolt 20 and is opened vertically so that the inserted bolt 20 does not rotate together with the nut 30 when the nut is fastened.

<C> Bolt As shown in FIG. 1, the bolt 20 has a threaded portion 22 formed by engraving a male screw at one end, and a wedge-shaped head portion 21 integrally formed at the other end. The wedge-shaped head portion 21 forms a pressing surface 211 that expands toward the end and is inclined with respect to the axial direction of the bolt 20. In this bolt 20, the pressing surface 211 has a straight groove 1
It is inserted into the long hole 111 and the round hole 121 toward the 5 side, that is, facing upward. In addition, after the bolt 20 is attached to the main body 10 as shown in FIG. 2, the rope 51 to be accommodated can be pressed according to the tightening force of the nut 30 to adjust the force. Further, since the surface of the pressing surface 211 is curved in the direction of the rope 51, the rope 51
Does not damage when pressed.

[0015]

[Operation] Next, a method of using the shock absorbing clip when used as a rockfall prevention fence will be described.

<a> Installation on a rockfall prevention fence FIG. 4 shows a part of the rockfall prevention fence 50, and FIG. 5 shows a rockfall prevention fence 50.
Shows a schematic diagram. The rockfall prevention fence 50 has pillars 5 on slopes.
4 are erected at predetermined intervals, and two large diameter ropes 51, 51 are stretched in parallel between the columns 54, 54, and a large number of thin ropes 52 are stretched between the ropes 51, 51. Then, a shock absorbing clip 70 is attached at the intersection of the ropes 51 and 52, and a known fastener 53 is attached at the intersection of the ropes 52, 52. As shown in FIGS. 1 and 5, the impact absorbing clip 70 is mounted by covering the main body 10 from above at the intersection of the ropes 51 and 52 so that the ropes 52 and 51 are placed inside the slant groove 15 and the straight groove 16, respectively. Bolt 2
0 is inserted into the long hole 111 and the round hole 121 from the screwing portion 22 side, and the nut 30 is attached to the screwing portion 22 via the washer 40.

<B> Setting of tightening of shock absorbing clip As shown in FIG.
The pressing surface 211 of 0 presses the peripheral surface of the rope 51 in the main body 10, the rope 51 presses the rope 52, and the rope 51 and the rope 52 are pressure-bonded in the clip body 10. At this time, since the inner surface of the connecting piece 13 and the peripheral surface of the rope 52 and the peripheral surface of the rope 51 and the peripheral surface of the rope 52 are pressed against each other with a large contact area, a large crimping force can be obtained with a small fastening force from the pressing surface 211. Further, since the inclined wedge-shaped head portion 211 presses the rope 51 obliquely by the rotation of the nut 30, a strong force is not required for tightening the nut 30, and the press contact force is finely adjusted. It is possible. Therefore, when the shock absorbing clip 70 is tightened, that is, the nut 30 is tightened, when the rocks 52 fall into the reticulated rope 52, the rope 5 is moved relative to the main body 10.
Subtle adjustments can be made to the extent that 1, 52 are slightly displaced.

<C> At the time of falling rocks If falling rocks occur above the slope of the falling rock prevention fence 50, FIG.
The falling rock 80 collides with the reticulated rope 52 as described above. If the collision is more than a predetermined impact force, the rope 52
Then, the shock absorbing clip 70 that has crimped the rope 51 moves toward the falling rock 80. Therefore, the mesh rope 52
Are collected in the rockfall 80 portion, the shock of the rockfall 80 is absorbed, and the fall of the rockfall 80 is prevented. Therefore, the components of the rockfall prevention fence 50 such as the pillars 54 are not deformed by the impact of the rockfall.

<D> During maintenance For the maintenance of the rockfall prevention fence 50 after rockfall, the rockfall 80 that collided with the rope 52 is retracted, the nuts 30 of the moved shock absorbing clips 70 are loosened, and returned to a predetermined position. It is sufficient to tighten the nut 30 with a predetermined force.

[0020]

Second Embodiment As shown in FIG. 7, the bolt 20 may be one in which a prismatic body 221 is attached to an end of a screwing portion 22.
The prismatic body 221 is for obtaining a reaction force directly from the bolt 20 when the nut 30 is fastened, and for example, a hexagonal prism can be adopted. Also, other shapes may be used.
When the nut 30 is fastened by applying a reaction force to the prismatic body 221, a pressing force is not applied to the wedge-shaped head portion 21 and the long hole 111 of the main body 10, and it is possible to reliably prevent the damage.

[0021]

Since the present invention is as described above, the following effects can be obtained.

<A> Since the rope is housed along the pressure contact piece in the groove of the clip body, the rope and the body can be pressure-contacted with a large contact area between the ropes. Therefore, a large crimping force can be obtained with a small fastening force.

<B> Since one end of the bolt has a wedge-shaped head and a pressing surface inclined with respect to the bolt axial direction is formed on the wedge-shaped head, the pressing surface is attached to the rope against the moving amount of the bolt when the nut is fastened. The movement amount of can be reduced. Therefore, it is easy to adjust the crimping force of the rope. Therefore, since the crimping force at the rope crossing portion can be arbitrarily adjusted, it is possible to form a shock absorbing fence that allows the rope to be displaced at the time of a collision, and a great shock absorbing effect can be expected.

<C> Since the rope main body is provided with a groove for accommodating the rope in accordance with the arrangement direction of the rope, blind movement of the rope can be prevented and a stable shock absorbing effect can be secured.

<D> Since the prism is formed on the bolt, pressing force is not applied to the bolt wedge-shaped head and the through hole of the press contact piece when the nut is fastened, so that damage to them can be avoided.

[Brief description of drawings]

FIG. 1 is a perspective view of a shock absorbing clip.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

[Figure 4] Explanatory drawing of a rockfall prevention fence

[Figure 5] Explanatory drawing of rockfall prevention fence

FIG. 6 is an explanatory view of how to use the shock absorbing clip.

FIG. 7 is an explanatory diagram of the second embodiment.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kazuo Minami Kazuo Minami 2-11-4 Yaesu, Chuo-ku, Tokyo Kanamori Tohei Trading Co., Ltd. (72) Masateru Kasama 5-5 Kimachi, Takaoka-shi, Toyama Teikoku Metals Co., Ltd. In the company

Claims (2)

[Claims] 1. A shock absorbing clip which allows sliding of a rope when a certain tension or more is applied to the rope by crimping an intersecting part formed by winding the other rope around the rope in the shock absorbing fence, A main body having pressure contact pieces facing each other and having a through hole penetrating each pressure contact piece, and a threaded portion is formed at one end and a wedge-shaped head is formed at the other end. And a nut attached to a threaded portion of the bolt, the main body forms a groove along the pressure contact piece between the pressure contact pieces, and enables the rope to be accommodated in the groove. The shock-absorbing clip is characterized in that the bolt has a wedge-shaped head formed with a pressing surface for obliquely pressing the rope accommodated in the main body. 2. The shock absorbing clip according to claim 1, wherein a prismatic body is formed at an end portion of the threaded portion of the bolt.