JP4862886B2 - Rope material impact force absorbing structure and protector - Google Patents

Description

  The present invention relates to an impact force absorbing structure for a rope material and a protective body.

Conventionally, as this type, a loop-like overlapping part is formed on the support wire of the avalanche rock prevention body, and the overlap part is tightened with a fastening member, and the support wire is a conservative rope material for avalanche / fall rock prevention An impact force absorbing device (for example, Patent Document 1) has been proposed, and supports are provided at predetermined intervals, a horizontal rope member is moored between each support member while allowing horizontal sliding, and both ends of the horizontal rope member are provided. Is fixed, shielded between wires with a wire net locked to a horizontal rope material, and a loop portion that is an extra length formed by polymerizing the rope material in the middle of the horizontal rope material, and a loop portion 2. Description of the Related Art An impact absorbing fence (for example, Patent Document 2) provided with a holding tool that holds an overlapping portion with a constant force is known.
JP-A 61-24711 JP-A-7-197423

  In the above prior art, when a tension equal to or higher than the set tension of the horizontal rope member is applied, the extra length can be extended and the tension can be absorbed while the horizontal rope member maintains a constant frictional force.

  In the above buffer structure, the impact absorbing effect is improved by increasing the number of the holding tools and increasing the strength of the rope member, but there is a problem that the cost is increased as a whole.

  Accordingly, an object of the present invention is to provide an impact force absorbing structure for a rope material that is inexpensive and has a high impact force absorbing effect, and an object thereof is to provide a protective body having a high impact force absorbing effect.

  The invention of claim 1 includes a loop portion provided in the rope material, and a shock absorber provided in the overlapping portion of the rope material of the loop portion and sandwiching the overlapping portion with a predetermined force. When the above tension is applied, the loop portion shrinks and the rope material frictionally slides on the shock absorber to absorb the tension. The loop portion shock-absorbing tool is abutted against the shock-absorbing tool and the rope member slides frictionally.

  According to a second aspect of the present invention, the loop portion shock absorbers are respectively provided on the rope members of the loop portions on both sides of the shock absorber.

  According to a third aspect of the present invention, the rope material of the loop portion is loosely inserted into a plurality of rings.

  Moreover, invention of Claim 4 is equipped with the impact-force absorption structure of the rope material of any one of Claims 1-3.

  According to the configuration of the first aspect, in addition to absorbing the impact force when the rope material frictionally slides on the shock absorber, the rope material becomes the shock absorber for the loop portion after the shock absorber for the loop portion comes into contact with the shock absorber. The sliding force can be absorbed to absorb the attack force. Therefore, it is possible to improve the impact force absorbing effect without changing the shock absorber and the rope material.

  Moreover, according to the structure of Claim 2, an impact force can be absorbed when the shock absorber for loop parts of both sides carries out friction sliding of the rope material.

  Further, according to the configuration of claim 3, when receiving a tensile force, the loop portion is reduced until the plurality of ring portions, the shock absorber, and the shock absorber for the loop portion come into contact with each other, and is not further reduced. The large deformation of the rope material in the loop portion can be prevented, and the strength reduction of the rope material after the loop portion can be reduced can be suppressed.

  Moreover, according to the structure of Claim 4, the protective body excellent in the impact-force absorption effect can be provided.

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, an unprecedented protector is obtained by adopting an impact force absorbing structure of a rope material different from the conventional one, and the impact force absorbing structure and the protector of the rope material are described respectively.

  Hereinafter, embodiments of the rock fall protection net structure of the present invention will be described with reference to FIGS. First, a description will be given of the protective fence 1 in which an impact force absorbing structure is provided on the horizontal rope member and the refrigeration rope member of the protective body. A protective fence 1 as a protective body is provided with a plurality of support columns 3 and 3 standing at intervals on a slope or a lower part of the slope, and a horizontal rope member 4 is provided between the support columns 3 and 3 in a plurality of stages. The net 5 serving as a protective surface is stretched between the support columns 3 and 3. In addition, the upper portion of the support column 3 and a ground mountain such as a mountain side or a side of the protective fence 1 are connected by a reed rope material 5. And the said horizontal rope material 4 and the storage rope material 6 consist of the wire rope 7 which put together the some steel wire. In addition, the end part of the holding rope material 6 is fixed to the natural ground by the anchor 8.

  The impact force absorbing structure 11 is provided on each of the lateral rope member 4 and the retaining rope member 6, and forms a loop portion 12 on the wire rope 7 of the transverse rope member 4 and the wire rope 7 of the retaining rope member 6, The overlapping portion of the wire rope 7 of the loop portion 12 is clamped by the buffer 13 with a predetermined force. The shock absorber 13 is formed through the pair of gripping bodies 14, 14, a pair of fitting grooves 15, 15 provided at the joint of the gripping bodies 14, 14, and the gripping bodies 14, 14. Through holes 16, 16 provided at positions sandwiching the fitting grooves 15, 15, bolts 17 inserted into the through holes 16, 16 of the both gripping bodies 14, 14, and the ends of the bolts 17 are screwed. A nut 18, the wire ropes 7, 7 are arranged in the fitting grooves 14, 14, and the nuts 18 are fastened to the bolts 17, so that the wire ropes 7, 7 are applied with a predetermined force between the gripping bodies 14, 14. Can be pinched.

  The wire ropes 7, 7 on both sides of the loop portion 12 with the buffer 13 interposed therebetween are respectively provided with loop portion buffers 21 spaced from the buffer 13. The loop portion buffer 21 is formed through the pair of gripping bodies 14A and 14A, a fitting groove 15A provided at the joint of the gripping bodies 14A and 14A, and the gripping bodies 14A and 14A. Through holes 16A, 16A provided at a position sandwiching the joint groove 15A, a bolt 17A inserted through the through holes 16A, 16A of the gripping bodies 14A, 14A, and a nut 18A screwed to the tip of the bolt 17A, The wire rope 7 can be held between the gripping bodies 14A and 14A with a predetermined force by disposing the wire rope 7 in the fitting groove 14A and fastening the nut 18A to the bolt 17A.

  In the wire rope 7 of the loop portion 12, a plurality of rings 22, 22... Made of a hard material such as metal are disposed between the loop cushions 21, 21. , 22... Are inserted into the wire rope 7 loosely. A through-hole 23 through which the wire rope 7 is inserted is formed in the ring body 22, and end surface corner portions 24 on both sides of the ring body 22 are formed in a tapered shape that decreases toward the end portion. The angle θ of the corner portion 24 is about 5 to 30 degrees with respect to the direction perpendicular to the axis of the ring body 22.

  In the ring body 22, the loop portion 12 is contracted, and both the shock absorbers 21 and 21 for the loop portion abut against the shock absorber 13, and a plurality of the ring bodies 22 abut between the shock absorbers 21 and 21 for the loop portion. In this state, the wire rope 7 of the reduced loop portion 12 is prevented from causing plastic deformation, and the number corresponding to this condition is provided. Further, even if the adjacent ring bodies 22 and 22 come into contact with each other, since the end face 24 is formed in a tapered shape, the ring bodies 22 and 22 also come into contact with each other obliquely along the shape of the loop portion 12. This prevents excessive force from being applied to the wire rope 7.

  Therefore, when the protective fence 1 receives an impact force such as falling rocks and a tension of a predetermined level or more is generated in the wire rope 7 of the horizontal rope member 4 and / or the stay rope member 6, the loop portion 12 is first applied to the shock absorber 13. So that the wire ropes 7 and 7 in the overlapping portion frictionally slide to absorb the impact force, and when the shock absorbers 21 and 21 collide with the shock absorber 13, the wire rope 7 The impact force can be absorbed efficiently by friction sliding with the tools 13 and 21.

  Further, when the shock absorber 13, the loop portion shock absorbers 21, 21 and the plurality of ring bodies 22, 22,... Are in contact with each other, the loop portion 12 is not further reduced, and the horizontal rope material 4 and the reserving rope material. 6 wire ropes 7 can counteract the impact force.

  Thus, in this embodiment, corresponding to claim 1, the loop portion 12 provided in the rope member 7 and the overlapping portion of the rope members 7 and 7 of the loop portion 12 are provided with a predetermined force. And a shock absorber 13 that is clamped between the rope member 7 and when the tension more than a predetermined value acts on the rope member 7, the loop portion 12 shrinks and the rope members 7 and 7 frictionally slide on the shock absorber 13 to absorb the tension. In the impact force buffering structure of the rope material in the body protection fence 1, the rope material 7 of the loop portion 12 is sandwiched, and the loop portion shock absorber 21 in which the rope material 7 frictionally slides against the shock absorber 13 is provided. Thus, in addition to absorbing the impact force when the rope material 7 frictionally slides on the shock absorber 13, after the loop portion shock absorber 21 abuts against the shock absorber 13, the rope material 7 contacts the loop portion shock absorber 21. By rubbing and sliding, it is possible to absorb the attack power. That. Therefore, the impact absorption effect can be improved without changing the buffer 13 or the rope material 7.

  In this way, in this embodiment, corresponding to claim 2, since the loop members 21 and 21 are provided on the rope members 7 of the loop portions 12 on both sides of the buffer 13, respectively, the loop portions on both sides are provided. The shock absorbers 21, 21 can absorb the impact force by sliding on the rope member 7.

  In this way, in this embodiment, in response to claim 3, since the rope member 7 of the loop portion 12 is loosely inserted into the plurality of rings 22, 22,. 12 is reduced until the plurality of ring portions 22, 22..., The buffer 13 and the loop buffer 21 come into contact with each other, and is not further reduced. Deformation can be prevented, and the loop portion 12 can suppress a decrease in strength of the rope member 7 after being reduced.

  In this way, in this embodiment, corresponding to claim 4, since it is a protective fence 1 as a protective body provided with the impact force absorbing structure for a rope material according to any one of claims 1 to 3, The protective fence 1 excellent in the impact force absorption effect can be provided.

  Further, as an effect of the embodiment, even when the loop portion 12 is contracted and the adjacent ring bodies 22 and 22 come into contact with each other, the end face corner portion 24 of the ring body 22 is formed in a taper shape. The ring bodies 22, 22 are also in contact with each other at an angle along the shape of the ring 22, and an excessive force is not applied to the wire rope 7 by the ring body 22.

  FIG. 7 shows a second embodiment of the present invention. The same reference numerals are given to the same portions as those of the first embodiment, and detailed description thereof will be omitted. The wire rope 7 of the portion 12 is fixedly provided with a fixed stopper 25 at a substantially central position, and the ring bodies 22 are arranged on both sides of the fixed stopper 25, respectively. In this example, the same number of the rings on both sides. The body 22 is arranged.

  Therefore, a predetermined tension or more is generated on the wire rope 7 of the horizontal rope member 4 and / or the holding rope member 6, the loop portion 12 is contracted, and the wire rope 7 is frictionally slid against one loop portion shock absorber 21. Even when the wire rope 7 does not cause frictional sliding with respect to the other loop portion buffer 21, the shock absorbers 13, 21, the ring body 22, and the fixing stopper 25 are applied to one side of the frictional sliding. When it comes into contact, the wire rope member 7 starts frictional sliding in the other loop part buffer 21, and at least when the other loop part buffer 21 collides with the buffer 13 and the other loop part buffer. When the 21 goes from the static friction state to the dynamic friction state, the impact force is absorbed, so that the impact force can be efficiently absorbed as a whole.

  Thus, also in the present embodiment, the same operations and effects as in the first embodiment are obtained.

  As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, the impact force absorbing structure may be provided in an auxiliary vertical rope material, an auxiliary horizontal rope material, or the like, and thus the impact force absorbing structure can be provided in various rope materials.

It is a front view of the protector which shows Example 1 of this invention. It is a side view of a protector same as the above. It is a front view of an impact force absorption structure same as the above. It is a top view of the buffer provided in the superimposition part same as the above. It is a side view of a shock absorber same as the above. It is a side view of the buffer for loop parts same as the above. It is a front view of the impact-force absorption structure which shows Example 2 of this invention.

Explanation of symbols

1 Guard fence (protector)
2 Installation location 3 Prop 4 Horizontal rope 5 Net (protective surface)
6 Retaining rope material 7 Wire rope 11 Impact force absorbing structure 12 Loop part 13 Buffer 21 Loop part buffer 22 Ring body 23 Through-hole 24 End face corner part θ angle

Claims (4)

A loop portion provided in the rope material, and a shock absorber provided in the overlap portion of the rope material of the loop portion and holding the overlap portion with a predetermined force, and when a tension higher than a predetermined value acts on the rope material in the shock-damping structure of the rope material together rope materials when the loop portion is reduced to absorb the tension and friction sliding on the bumper, as well as clamping the rope material of the loop part, those in the bumper An impact force absorbing structure for a rope material, comprising: a shock absorber for a loop portion in which the rope material comes into contact and frictionally slides. The rope material impact force absorbing unit according to claim 1, wherein the loop portion shock absorbers are respectively provided on the rope members of the loop portions on both sides of the shock absorber. The rope material impact force absorbing structure according to claim 1 or 2, wherein the rope material of the loop portion is loosely inserted into a plurality of rings. The protector provided with the impact-force absorption structure of the rope material of any one of Claims 1-3.

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