JP2782161B2 - Rope opening prevention device in shock absorbing fence - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope opening prevention device for a rock fall prevention fence or a shock absorbing fence such as a guardrail of a vehicle.

[0002]

2. Description of the Related Art There is known an impact absorbing fence in which a support is erected at a predetermined interval on a slope or a road shoulder at risk of falling rocks, and a plurality of ropes are stretched in parallel between the supports.

[0003]

The above-mentioned shock absorbing fence has the following problems.

<A> A collision object such as a falling rock is received by a rope. However, since the rope has flexibility, the collision object spreads up and down at the time of collision and the collision object passes between the ropes. This tendency becomes remarkable as the standing interval of the columns becomes wider.

<B> As a method of preventing the passage of a collision object, it is conceivable to reduce the standing interval of the columns or the span of the rope. However, these methods increase the number of columns and ropes to be installed, thus increasing the construction cost.

<C> Under such a background, there is a strong demand for a proposal of a new technology capable of economically and reliably preventing the opening of the rope from opening.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a shock absorber capable of reliably preventing the opening of a rope without increasing the number of columns and ropes. An object of the present invention is to provide a rope opening prevention device in an absorption fence. Still another object of the present invention is to provide
Rope opening in shock absorption measures that can significantly reduce
To provide a protection device.

[0008]

Means for Solving the Problems That is, the invention according to claim 1 is directed to a shock absorbing fence comprising a plurality of horizontal ropes stretched on pillars erected at predetermined intervals. Multiple in between
Although the one obtained by connecting rings to traverse the chain, the intersection of the at least one rope and chain, given Li
Clamps the rope between the holding plate attached to the
The rope opening preventing device is characterized in that it is fixedly connected by a fixing clip made of a U-bolt and movably connected to an intersection with another rope.
The invention according to claim 2 is a method in which a plurality of pillars erected at predetermined intervals are
Water on a shock-absorbing fence made of several horizontal ropes
One-piece chain with multiple rings connected between flat ropes
Cross at least one rope and chain.
The difference between the holding plate attached to the predetermined ring and the holding plate
A fixing clip consisting of a U bolt that holds the rope between
, Fixed connection and crossing with other ropes
Part with the rope inside and its end in the ring
The penetrating U bolt and the end of the U bolt are pulled out of the ring.
Play, consisting of a holding plate that fastens its end so that it does not
It is characterized by being freely connected by clips.
This is a rope opening prevention device. Invention according to claim 3
Is installed with multiple horizontal ropes
In a shock absorbing fence that is
Traverse a single chain connecting the rings,
Attach a U-bolt to at least one rope and
Attach the specified ring and holding plate to the
By doing so, fixed connection and other ropes
With the rope inside and the end
U bolt penetrating through the ring and the end of the U bolt
From the presser plate that fastens its end so that it does not come off
Specially designed to allow free connection
This is a rope opening prevention device.

[0009]

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 rope opening prevention device. The rope opening prevention device includes a chain 10 connected to a plurality of horizontally arranged ropes 42 by a fixing clip 20 and a play clip 30. Hereinafter, each part will be described in detail.

<B> Chain As shown in FIG. 1, a chain 10 is attached to a plurality of ropes 42. That is, the chain 10 is
Is arranged in the direction crossing the rope 42 on the side where the shock is applied, and the upper end intersection is connected by the fixing clip 30;
The other intersection is connected to the rope 42 by the play clip 20. As the chain 10, a known chain formed by connecting a plurality of rings 11 can be used, but a chain having a vertical inner dimension larger than the outer diameter of the rope 42 to be connected is selected. On the other hand, if a wire rope or the like is used as a member for connecting the ropes 42 instead of the chain 10, it is very difficult to restrain the rope 42 from moving up and down at the time of a falling rock collision. The use of the chain 10 allows the rope 42 to be easily restrained from moving up and down.

<C> Fixing clip As shown in FIG. 2, the fixing clip 30
It is composed of a bolt 32 and a nut 33. The holding plate 31 is a plate body having a T-shaped cross section.
11 are respectively opened, and the end ring 11 of the chain 10 is connected to the central piece. The through hole 311 is
The bolt 32 is opened so that it can be inserted. As shown in FIG.
The fixing clip 30 positions the rope 42 between the U-bolt 32 and the holding plate 31, and connects the U-bolt 32 to the through hole 311,
The end of the chain 10 is fixed to the rope 42 by inserting it through the nut 311 and fastening it with the nuts 33 on the back side.

<D> Play Clip The play clip 20 is a member that movably connects the chain 10 to the rope 42. As shown in FIGS. 1 and 3,
The loose clip 20 includes a holding plate 21, a U-bolt 22, and nuts 23 and 24. The holding plate 21 is a plate body having a shape that does not pass through the inside of the ring 11 of the chain 10, and is provided with a through hole that penetrates the front and back of the holding plate 21, similarly to the holding plate 31. The U-bolt 22 is a U-shaped bolt having screw grooves 221 formed at both ends, and screws are formed at both ends. U bolt 22 is connected to rope 4
A U-shape having an inner diameter larger than the outer diameter of 2 is used.

The loose clip 20 is attached to a rope 42 connecting the U bolt 22 to which nuts 23 and 23 have been attached in advance, and both ends of the U bolt 22 are placed in the ring 11 of the chain 10 and the holding plate 21 respectively. , And fastened with nuts 24, 24, and the screw-side end of the U bolt 22 is fixed to the holding plate 21. For this reason, the U bolt 22 does not move from the predetermined ring 11 while being movable along the rope 42. Therefore, the chain 10 is movably connected to the rope 42 via the play clip 20.

[0015]

Next, the function of the rope opening prevention device when installed on a rock fall prevention fence will be described.

<A> Installation on Rockfall Prevention Fence FIG. 4 shows a rockfall prevention fence 40. The rockfall prevention fence 40 has pillars 41 erected at predetermined intervals on a slope or the like, and a plurality of ropes 42 are attached in parallel between the pillars 41. The chain 10 of the rope opening prevention device is fixedly connected to the uppermost rope 42 by the fixing clip 30 and is movably connected to the other ropes 42 by the loosening clip 30 at a substantially central position between the columns 41. . Since the installed chain 10 is a linear member, it does not impair a landscape such as a slope.

<B> Rockfall Prevention Function When rockfall falls from above the slope where the rope opening prevention device is installed, the rockfall collides with the rope 42, and the impact causes a force in the direction in which the ropes 42, 42 expand vertically. Is added. However, the chain 10 restrains the movement of the ropes 42,42. That is, as shown in FIG. 1, the U-bolt 22 is attached to the chain 10 while penetrating through the predetermined ring 11 with the rope 42 held therein, unless the U-bolt 22 and the ring 11 are damaged. On the other hand, the rope 42 does not shift up and down. Therefore, the rope 42
, And the falling rock does not pass between the ropes 42. In addition, the vertical function of the rope 42 which is the original function
Attach the chain 10 while keeping the opening prevention effect
Workability can be greatly improved. Furthermore, if the chain 10 is low
Since the chain 10 can move freely with respect to the
Restoration work can be performed without disconnecting.

[0018]

Embodiment 2 When fixing the chain 10 to the uppermost rope 42, as shown in FIG. 5, instead of the fixing clip 30, the nuts 23 of the loosening clip 20 are not mounted. Is also good. At that time, nuts 24, 2
4 is strongly tightened, and the ring 11 at the end of the chain 10 is pressed against the rope 42 so that the chain 10 is fixed to the rope 42.

[0019]

Third Embodiment In some cases, the chain 10 of the first embodiment is fixed to a member other than the uppermost rope 42 and is movably connected to another rope 42. At this time, in order to movably attach the end of the chain 10 to the uppermost rope 42, the play clip 20 may be used without installing the holding plate 31 on the ring 11 at the end of the chain 10.

[0020]

Fourth Embodiment As shown in FIG. 6, a U-bolt 22 according to a first embodiment has a U-shaped bent portion 2 with respect to an end on which a screw groove 221 is engraved.
The U-bolt 22a may have a large diameter. The outer diameter of the U-shaped bent portion 222 is formed larger than the inner diameter of the through hole of the holding plate 21 so that the U-shaped bent portion 222 does not pass through the through hole. If the U bolt 22a is used, the nut 2 attached to the U bolt 22 in the first embodiment is used.
3, 23 can be omitted, and the cost of parts can be reduced, and the labor for mounting the nut can be saved. Further, as shown in FIG. 7, even if the diameter of the stopper 223 is increased adjacent to the thread groove 221 without providing a large diameter over the entire length of the U-shaped bent portion 222, the same as that of FIG. The effect is obtained.

[0021]

Embodiment 5 Of course, the rope opening prevention devices of Embodiments 1 to 4 may be used for a guard rope installed on a road shoulder or the like. In this case, it is possible to reliably prevent the vehicle from passing between the ropes at the time of collision and absorb the impact force of the vehicle to reduce the damage.

[0022]

As described above, the present invention has the following effects.

<A> Since the chain is installed in a direction perpendicular to the rope and the rope is restrained to a predetermined ring via the clip, the rope does not move up and down at the time of a falling rock collision or the like. Therefore, falling rocks and the like can be reliably prevented from passing through the rope.

<B> Up and down of the rope which is the original function
Attaching the chain while maintaining the opening prevention effect
Workability can be greatly improved. Furthermore, the chain becomes a rope
Because it can move freely without removing the chain.
Old work can be done.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rope opening prevention device.

FIG. 2 is an explanatory view of a fixing clip.

FIG. 3 is an explanatory view of a play clip.

FIG. 4 is an explanatory view of the installation state of the rope opening prevention device.

FIG. 5 is an explanatory view of a second embodiment.

FIG. 6 is an explanatory view of a fourth embodiment.

FIG. 7 is an explanatory view of a fourth embodiment.

Continuing on the front page (72) Kazuo Minami, 2-11-4 Yaesu, Chuo-ku, Tokyo Inside Kanemori Toheiira Corporation (72) Inventor Masaki Kasama 5-5 Kimachi, Takaoka City, Toyama Prefecture Teikoku Metals Company ( 56) References: Japanese Utility Model 1975-69104 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E01F 7/04

Claims (3)

(57) [Claims] 1. A shock absorbing fence comprising a plurality of horizontal ropes stretched on a support standing upright at predetermined intervals, wherein a single chain having a plurality of rings connected between the horizontal ropes is provided. is traversed, the intersection of the at least one rope and chain, predetermined
Hold the rope between the holding plate attached to the ring and the holding plate.
A rope opening prevention device, characterized in that the rope is prevented from being fixedly connected by a fixing clip including a U-bolt to be held, and that an intersection with another rope is movably connected. 2. A shock absorbing fence comprising a plurality of horizontal ropes stretched on a support standing upright at predetermined intervals, wherein a single chain having a plurality of rings connected between the horizontal ropes is used. At the same time, the intersection of at least one rope and the chain is fixedly connected by a fixing clip including a holding plate attached to a predetermined ring and a U-bolt holding the rope between the holding plate. At the intersection with the rope, place the rope inside
U-bolt whose end portion penetrates through the ring and the U-bolt
Fasten the end so that the end does not come out of the ring
A rope opening prevention device, characterized in that it is movably connected by a play clip comprising a holding plate . 3. A shock absorbing fence comprising a plurality of horizontal ropes stretched on pillars erected at predetermined intervals, wherein a single chain in which a plurality of rings are connected between the horizontal ropes is used. Traverse , hook a U-bolt on at least one rope ,
Attach the specified ring and holding plate to the bolt and tighten the nut.
By fixing, the rope is fixedly connected, and the intersection with the other rope is positioned inside the rope, and the end of the U-bolt penetrates the inside of the ring and the end of the U-bolt does not come off from the inside of the ring. A rope opening preventing device, characterized in that it is movably connected by a play clip comprising a holding plate for fastening the end of the rope.