JPH0827736A - 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 shock absorbing clip to press the crossing between two ropes to allow the slide of the ropes when certain or greater tension is applied to the ropes has a mainbody 10 provided with mutually opposed press-contact pieces 11, 12 and through-holes penetrating 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, storage grooves 15, 16 are formed between the press-contact strips toward the respective ropes to store the crossing of ropes 51, 52 therein. For the bolt 20, the thrusting face 211 is formed on the wedged head 21 to slantly press- contact the ropes 51, 52 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]

[Means for Solving the Problems] That is, the present invention is directed to a shock absorbing clip that crimps the intersecting portions of two ropes and allows the ropes to slide when a certain tension is applied to the ropes. A main body having a pressure contact piece having a through hole formed in each pressure contact 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 pressure contact pieces. The main body is formed with a nut attached to a threaded portion of the bolt, and the main body is formed with a receiving groove in the direction of each rope between the press contact pieces so that the rope crossing portion can be received. The impact absorbing clip is characterized in that a pressing surface for obliquely pressing the rope accommodated therein 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 be crimped by the shock absorbing clip 70. Each part will be described in detail below.

<B> Main Body The main body 10 is a member having two pressure contact pieces 11 and 12 facing each other, and accommodating the intersection of the ropes 51 and 52 between them. As shown in FIG. 1, for example, the main body 10 has a structure in which opposing pressure contact pieces 11 and 12 are connected by a connection piece 13, 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 accommodation grooves 15 and 16 for accommodating the rope are engraved in the inner part thereof as shown in FIG. 2 or 3. The accommodating grooves 15 and 16 are parallel to the pressure contact pieces 11 and 12 when seen in a plane as shown in FIG. 3, and are formed so as to intersect each other when seen from a side as shown in FIG. Storage groove 15, 16
The groove width is set to be approximately the same as the outer diameter of the ropes 51 and 52. For this reason, the ropes 51 and 52 are formed in the grooves 15 and 1.
It is accommodated in the side-by-side state between the pressure contact pieces 11 and 12 without lateral displacement within the pressure contact piece 6.

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 rockfall prevention fence FIG. 4 shows a schematic view of the rockfall prevention fence 50. Rockfall prevention fence 50
Struts 54 are erected at predetermined intervals on a slope or the like, and two large diameter ropes 53, 53 are arranged in parallel between the struts 54, 54.
And a narrow diameter rope 51 (5
2) are stretched to form a net and rope 51 and rope 52
The impact absorbing clip 70 is attached to the intersection position of, and a known fastener 55 is attached to the intersection position of the rope 53 and the rope 51 (52). The shock absorbing clip 70 is attached to the ropes 51 and 5 as shown in FIG.
At the intersection of the two, the main body 10 is installed from above and the rope 5
The bolts 2 and 51 are inserted into the accommodation grooves 15 and 16, respectively, and the bolt 20 is inserted into the elongated hole 111 and the round hole 121 from the screwing portion 22 side, and the washer 4 is inserted into the screwing portion 22.
It is carried out by attaching the nut 30 through 0.

<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 21 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, the degree of tightening of the shock absorbing clip 70, that is, the degree of tightening of the nut 30 is so delicate that the ropes 51 and 52 are slightly displaced from the main body 10 when rocks fall on the reticulated ropes 51 and 52. Can be adjusted.

<C> Falling rocks When falling rocks occur above the slope of the rockfall prevention fence 50, FIG.
The falling rock 80 collides with the reticulated ropes 51 and 52 as described above. When the collision has an impact force of a predetermined value or more, the ropes 51, 51 that have been crimped in the accommodation grooves 15, 16 slide, and the impact absorbing clip 70 moves in a direction in which it spreads from the rockfall 80. However, as described above, the shock-absorbing clip 70 ensures that the ropes 51, 52 are securely pressed with a predetermined pressure.
Since it is crimped with, rockfall 80 is a net-shaped rope 51,
It does not pass through 52. Due to the movement of the impact absorbing clip 70, the impact of the rockfall 80 is absorbed, and the rockfall 8 falls.
The fall of 0 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 colliding with the ropes 51 and 52 is retracted, and the nuts 30 of the moved shock absorbing clips 70 are loosened to a predetermined position. All that is required is to put it back and tighten the nut 30 with a predetermined force.

[0020]

Second Embodiment As shown in FIG. 6, the bolt 20 may be one in which a prismatic body 221 is attached to the end of the 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 accommodated along the pressure contact piece in the accommodation 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> By providing the receiving groove in the clip body 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

FIG. 5 is an explanatory diagram of how to use the shock absorbing clip.

FIG. 6 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 crimps the intersection of two ropes and allows the ropes to slide when a certain tension is applied to the ropes. A main body having a through hole formed in one piece, a bolt having one end formed with a threaded portion and the other end formed with a wedge-shaped head, and a bolt arranged to pass through each of the pressure contact pieces and attached to the threaded portion of the bolt. The main body is formed with a receiving groove in the direction of each rope between the press contact pieces so that the rope intersecting portion can be accommodated, and the bolt is accommodated in the main body by the wedge-shaped head. A shock absorbing clip, characterized in that a pressing surface for obliquely pressing the rope is formed. 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.