JPH07279126A - Rope opening preventing device in impact absorbing fence - Google Patents

Abstract

PURPOSE:To surely prevent the opening of a rope without increasing the setting number of struts or ropes. CONSTITUTION:In an impact absorbing fence having a plurality of horizontal ropes 42 laid over struts erected at prescribed intervals, a chain 10 is crossed between the horizontal ropes 42. The intersection part between at least one rope 42 and the chain 10 is fixed and connected, and the intersection part with the other rope 42 is connected in such a manner as to be freely movable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope opening preventing device for a rockfall preventing fence or a shock absorbing fence such as a vehicle guard rail.

[0002]

2. Description of the Related Art A shock absorbing fence is known in which columns are erected at predetermined intervals on slopes where road rocks are at risk and on road shoulders, and a plurality of ropes are stretched in parallel between them.

[0003]

Problems to be Solved by the Invention The above-mentioned shock absorbing fence has the following problems.

<a> Although a colliding object such as a falling rock is received by a rope, since the rope has flexibility, it spreads in the vertical direction at the time of a collision and the colliding object passes between the ropes. This tendency becomes more remarkable as the spacing between the upright columns becomes wider.

<B> As a method of preventing the passage of a colliding object, it is conceivable to narrow the standing interval of the columns or the tension interval of the ropes. However, these methods increase the construction cost because the number of columns and ropes installed increases.

<C> Under such a background, proposal of a new technology capable of economically and surely preventing the opening of a rope is desired.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a shock that can reliably prevent the opening of a rope without increasing the number of columns or ropes installed. It is to provide a rope opening prevention device for an absorption fence.

[0008]

[Means for Solving the Problems] That is, according to the present invention, in a shock absorbing fence in which a plurality of horizontal ropes are stretched on columns which are erected at predetermined intervals, a chain in which a plurality of rings are connected between the horizontal ropes. And a U-bolt that clamps the rope between the pressing plate and the crossing part of at least one rope and chain attached to a predetermined ring. A play consisting of a U-bolt whose inside is located at the intersection with the rope and the end of which penetrates the inside of the ring, and a holding plate which fastens the end of the U-bolt so that the end of the U-bolt does not come off from the ring. The rope opening prevention device is characterized in that it is movably connected by a wearing clip.

[0009]

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

<B> Overall Structure FIG. 1 shows a perspective view of the rope opening preventing device. The rope opening prevention device is composed of a chain 10 in which a plurality of horizontally arranged ropes 42 are connected by a fixing clip 20 and a loosening clip 30. Each part will be described in detail below.

<B> Chain As shown in FIG. 1, the chain 10 is attached to a plurality of ropes 42. That is, the chain 10 is the rope 42
Is arranged in a direction traversing the rope 42 on the side where the impact is applied, and the intersection of the upper end is connected by the fixing clip 30,
The other intersections are connected to the rope 42 by loosening clips 20. As the chain 10, a well-known one formed by connecting a plurality of rings 11 can be used, but a chain 10 whose inner dimension in the longitudinal direction is 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 vertical movement of the ropes 42 at the time of a rockfall collision, but the plurality of rings 11 are connected. By using the chain 10 described above, the vertical movement of the rope 42 can be easily restrained.

<C> Fixing Clip The fixing clip 30, as shown in FIG.
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, and the through holes 3 are formed in the end pieces at both ends.
11 are respectively opened, and the ring 11 at the end of the chain 10 is connected to the central piece. The through hole 311 is U
The bolt 32 is opened so that it can be inserted. As shown in Figure 2,
The fixing clip 30 positions the rope 42 between the U-bolt 32 and the pressing plate 31 to allow the U-bolt 32 to pass through the through hole 311.
The end portion of the chain 10 is fixed to the rope 42 by being inserted into 311 and fastened by the nuts 33, 33 on the back side.

<D> Playing Clip The playing clip 20 is a member that movably connects the chain 10 to the rope 42. As shown in FIGS. 1 and 3,
The loose attachment clip 20 is composed of 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 ring 11 of the chain 10, and is provided with through holes that penetrate the front and back sides thereof similarly to the holding plate 31. The U bolt 22 is a U-shaped bolt having a thread groove 221 formed at both ends thereof, and has screws formed at both ends thereof. U bolt 22 is rope 4
Use a U-shaped one having an inner diameter larger than the outer diameter of 2.

The attachment clip 20 is attached to the rope 42 connecting the U bolts 22 to which the nuts 23 and 23 are attached in advance, and both ends of the U bolts 22 are respectively inside the ring 11 of the chain 10 and the holding plate 21. Of the U bolt 22 is fixed to the holding plate 21 by tightening the nuts 24, 24. Therefore, 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 loose attachment clip 20.

[0015]

[Operation] Next, the function of the rope opening prevention device when installed on a rockfall 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 columns 41 standing upright on a slope or the like at predetermined intervals, and a plurality of ropes 42 are attached in parallel between the columns 41. The chain 10 of the rope opening prevention device is fixedly connected to the uppermost rope 42 and the fixing clip 30 at a substantially central position between the columns 41, and is also movably connected to the other ropes 42 and the loosening clip 30. . Since the installed chain 10 is a linear member, it does not spoil the landscape such as slopes.

<B> Rockfall prevention function When rockfall or the like falls from above the slope where the rope opening prevention device is installed, the rockfall collides with the rope 42, and the impact causes the ropes 42, 42 to spread 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 so as to penetrate the predetermined ring 11 while holding the rope 42 therein, so that the U-bolt 22 and the ring 11 are attached to the chain 10 as long as they are not damaged. On the other hand, the rope 42 does not move vertically. Therefore, the rope 42
To prevent the rocks from passing between the ropes 42.

[0018]

[Embodiment 2] When fixing the chain 10 to the uppermost rope 42, instead of the fixing clip 30, as shown in FIG. Good. At that time, the 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] The chain 10 of the first embodiment may be fixed to a rope other than the uppermost rope 42 and movably connected to the other ropes 42. At this time, in order to movably attach the end of the chain 10 to the uppermost rope 42, it is sufficient to use the loose-fitting clip 20 without installing the pressing plate 31 on the ring 11 at the end of the chain 10.

[0020]

Fourth Embodiment As shown in FIG. 6, the U bolt 22 of the first embodiment has a U-shaped bent portion 2 with respect to an end portion on which a screw groove 221 is engraved.
Alternatively, the U bolt 22a may be formed by increasing the diameter of 22. 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 penetrate the through hole. If the U bolt 22a is used, the nut 2 attached to the U bolt 22 in the first embodiment is
Since 3, 23 can be omitted, the cost of parts can be reduced and the nut mounting work can be saved. Further, as shown in FIG. 7, even if the diameter is not formed to be thick over the entire length of the U-shaped bent portion 222, provided that a stopper 223 adjacent to the thread groove 221 is provided, the enlarged diameter is similar to that of FIG. The effect is obtained.

[0021]

[Embodiment 5] Of course, the rope opening preventing 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 surely prevent the vehicle from passing between the ropes at the time of collision, absorb the impact force of the vehicle, and reduce the damage.

[0022]

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

<A> Since the chain is installed in the direction orthogonal to the rope and the rope is constrained to a predetermined ring via a clip, the rope does not move up and down in the event of a falling rock. Therefore, it is possible to reliably prevent falling rocks and the like from passing through the rope.

<B> Since the chain is a linear member,
By installing a rope opening prevention device on slopes, etc., the landscape will not be damaged.

[Brief description of 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 loose-fitting clip.

FIG. 4 is an explanatory view of a rope opening prevention device in an installed state.

FIG. 5 is an explanatory diagram of the second embodiment.

FIG. 6 is an explanatory diagram of Example 4.

FIG. 7 is an explanatory diagram of Example 4.

 ─────────────────────────────────────────────────── ─── 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 Association In-house

Claims (4)

[Claims] 1. A shock-absorbing fence in which a plurality of horizontal ropes are stretched on columns erected at predetermined intervals, and the chain is traversed between the horizontal ropes, and at least one intersection between the rope and the chain is fixed. A rope opening prevention device, characterized in that it is connected to the other rope so as to allow free movement at the intersection with other ropes. 2. In a shock absorbing fence in which a plurality of horizontal ropes are stretched on columns that are erected at predetermined intervals, a chain in which a plurality of rings are connected between the horizontal ropes is crossed, and at least one rope is provided. The intersection of the chain is fixed and connected by a fixing clip consisting of a holding plate attached to a predetermined ring and a U bolt that holds the rope between the holding plate, and the intersection with other ropes can be idled. A rope opening prevention device characterized by being connected to. 3. In a shock absorbing fence in which a plurality of horizontal ropes are stretched on columns that are erected at a predetermined interval, a chain in which a plurality of rings are connected between the horizontal ropes is crossed, and at least one rope is provided. The crossing part of the chain is fixedly connected by a fixing clip composed of a holding plate attached to a predetermined ring and a U bolt that holds the rope between the holding plate, and the crossing part with other ropes is connected to the rope. Can be floated by a loose-fitting clip consisting of a U-bolt that is located inside and the end of which penetrates the inside of the ring, and a holding plate that fastens the end of the U-bolt so that the end does not come out of the ring. A rope opening prevention device characterized by being connected to. 4. In a shock absorbing fence in which a plurality of horizontal ropes are stretched on columns which are erected at predetermined intervals, a chain in which a plurality of rings are connected between the horizontal ropes is crossed to form at least one rope. The U bolt is hooked, and the U
By attaching a predetermined ring and holding plate to the bolt and fixing it with a nut, it is fixedly connected, and at the intersection with other ropes, U-bolt that locates the rope inside and the end of the rope penetrates the ring. A rope opening prevention device, characterized in that the U-bolt end is movably connected by a loose-fitting clip composed of a retainer plate that fastens the U-bolt end so that it does not come out of the ring.