JP2003129484A - Fastening bracket for rope intersection - Google Patents

Abstract

An object of the present invention is to provide a fastening device for a rope intersection, which has a small and simple structure and can securely fasten an intersection of ropes with a small fastening force. SOLUTION: In a rope crossing fastener comprising a receiving member 6, a pressing member 7, and fastening members 8 and 9 for tightening the receiving member 6 and the pressing member 7, a rope fitting groove 10 of the receiving member 6 is intermediate. The rope fitting groove 10 ′ of the push fitting 7, which has a concave portion 100 at the portion and crosses the rope fitting groove 10 when facing the receiving metal 6, has a concave portion 100 ′ at an intermediate portion. , 100 ′, the rope intersections 30, 30 ′ are bent in a direction perpendicular to the axial direction, and the intersections are pushed into the recesses 100, 100 ′, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a metal fitting suitable for fastening an intersecting portion of a rope stretched across.

[0002]

2. Description of the Related Art For example, on slopes along roads, a rope laying method along the surface of the ground has been adopted to prevent rockfall and landslides. A large number of ropes are stretched in the vertical and horizontal directions of the surface and each intersection is fastened with U bolts. However, if the rope intersections are simply tightened with U-bolts, the ropes may move out of alignment, or the entire rope intersection may easily move together with the U-bolts, which may cause deformation of the net. It was

As a countermeasure against this, conventionally, as shown in FIG. 13 (a), a metal fitting A in which a plate material is pressed to form a groove a having a semicircular cross section, and the groove a is also formed by pressing.
And a metal fitting for forming a groove b that should intersect with the rope, a fastening metal fitting for a rope crossing portion having a structure of a two-piece clamp, and FIG.
As shown in (b), there is known a fastening metal fitting for a rope intersection, which has a structure in which a receiving metal fitting A ′ cast including the groove a and a pressing metal fitting B ′ are made into a two-piece clamp.

[0004]

In the case of such a clamp system, it is generally said that a fastening force up to the rope working load (for example, about 1/3 of the rope cutting load) is required. Are grooves of the receiving metal fittings A and A'and the pressing metal fittings B and B 'that face each other (lower half, upper half)
a and b have a uniform depth over the entire length, and the vertical rope R and the horizontal rope R'are fitted in about half of the cross section, and the rope intersections RC are vertically overlapped with each other, and the bolts and nuts are screwed together. They were only tightened by each other and pressed against each other.

For this reason, a sufficient fastening force that does not cause slippage at the intersections of the ropes cannot be obtained, and the ropes may shift in the longitudinal direction due to the load, which may cause the grid-like shape composed of the vertical ropes and the horizontal ropes to collapse. was there.

[0006] As measures against this, unevenness is arranged in the groove at a pitch corresponding to the valley of twist of the rope, and a friction coefficient increasing material such as glass powder is intervened. The difference was so remarkable that it was hardly effective.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to firmly fasten a rope intersection portion with a small and simple structure and a small tightening force. It is to provide a fastener for a rope intersection that can be used.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a receiving metal fitting and a pressing metal fitting each having a single rope fitting groove formed on the inner surface and intersecting each other when they are opposed to each other. A rope crossing fastener including a metal fitting and a fastener for tightening a push metal fitting, wherein the rope fitting groove of the receiving fitting has a recessed portion at an intermediate portion, and the rope fitting groove and the cross fit when facing the receiving fitting. The rope fitting groove of the pushing metal fitting has a recessed portion at an intermediate portion, and the rope intersection portion is bent in a direction perpendicular to the axial direction at the recessed portion, and the intersection portion is respectively pushed into the recessed portion. It is characterized by that.

The recesses of the receiving metal fittings and the pressing metal fittings are formed such that the intersecting portion is deepest and gradually becomes shallower toward both sides, and the maximum depth is about twice the depth of the rope fitting groove.

The receiving metal fittings and the pressing metal fittings include not only different structures but also common metal fittings having the same structure.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a rope net to which the present invention is applied. Reference numeral 1 denotes a slope, and a plurality of ropes 3, 3'in the vertical direction and the horizontal direction via anchors 2, 2 fixed to the slope 1, respectively. Is stretched. The intersections of the ropes 3 and 3'are fastened by the fasteners for intersections (hereinafter referred to as fasteners) 4 of the present invention.

Between the ropes 3 and 3 ', a plurality of intermediate ropes 5 are arranged in the vertical direction and the horizontal direction, and the intersections of the intermediate ropes 5 are formed by the fasteners for intersections according to the present invention or any other fasteners. It is fastened.

2 to 9 show a first embodiment of the fastener according to the present invention, wherein the fastener 4 comprises a receiving metal fitting 6 and a pressing metal fitting 7 which are to be arranged opposite to each other. The ropes 3 and 3'are sandwiched at right angles and the first tightening tool 8
By tightening with the second tightening tool 9, the intersection of the ropes is tightened. The first tightening tool 8 is a bolt in this example, and the second tightening tool 9
Are anchor bolts 9a and nuts 9b in this example.

FIG. 8 shows the receiving member 6 as a single unit. In this example, the plate body is made of a casting having a substantially elliptical shape or an oval shape in a plane, and one rope fitting groove 10 is formed in the inner surface in an oblique direction when viewed from a plane. The rope fitting groove 10 has an arc shape with a width substantially equal to that of the rope 3 (3 ') to be used and a depth of 1/2 or less of the rope cross-sectional area. A recessed portion 100 that is recessed in the thickness direction of the metal fitting is formed in the required range on both sides.

The recessed portion 100 is a space in which one of the intersecting ropes 3 and 3'is locally bent in a direction perpendicular to the axial direction when tightened by the first tightening tool 8 and the second tightening tool 9. And the width is the same as the rope fitting groove 10, but the depth corresponds to the rope crossing portion as shown in FIGS. 4 and 8 (d). The deepest point is formed in an arc shape so that it becomes gradually shallower as it goes away from the rope intersection portion, and the maximum depth is about twice the depth of the rope fitting groove 10.

On both sides of the rope fitting groove 10 near the outside, there are a female screw hole 13 for screwing a bolt as the first tightening tool 8 and a through hole 12 for inserting an anchor bolt of the second tightening tool 9. Each is provided.

FIG. 9 shows the pressing member 7 as a single body. In this example, the pressing member 7 is composed of a casting board which has a substantially elliptical or oval shape in plan view, and the inner surface of which is fitted with a rope obliquely when viewed from above. Grooves 10 'are formed. Rope fitting groove 10 '
Has a relationship orthogonal to the rope fitting groove 10 of the receiving metal fitting 6 when the pushing metal fitting 7 is inverted to face the receiving metal fitting 6, and has a width substantially equal to that of the rope 3 '(3') to be used. ,
It has an arc shape at a depth of 1/2 or less of the rope cross-sectional area.
The rope fitting groove 10 'also has a recessed portion 100' recessed in the thickness direction of the metal fitting in a required range including the intermediate portion, that is, the intersection of the ropes.

The recessed portion 100 'locally bends one of the intersecting ropes 3, 3'3' in a direction perpendicular to the axial direction when tightening the first tightening tool 8 and the second tightening tool 9. It is a space for receiving the bent part and making contact with it. The width is the same as the rope fitting groove 10 'like the receiving metal 6, but the depth is the deepest at the intersecting part and goes to both sides. The depth is gradually shallower, and the maximum depth is about twice the depth of the rope fitting groove 10.

On both sides of the rope fitting groove 10 'in the vicinity of the outside, there are a through hole 12 for inserting a bolt under the neck as a first tightening tool 8 and an anchor bolt for a second tightening tool 9. Each hole 14 is provided.

10 and 11 show a second embodiment of the fastener according to the present invention. In this embodiment, the first
One set of common metal fittings 7 ', 7'corresponding to the pressing metal fitting 7 of the embodiment is used. That is, as shown in FIG. 11, each of the metal fittings 7 ', 7'has a through hole 1 through which a bolt as the first tightening tool 8 is inserted, on both sides of the rope fitting groove 10, 10' in the vicinity of the outside.
2 and a through hole 14 through which an anchor bolt as the second tightening tool 9 is inserted. Then, in order to tighten the bolt as the first tightening tool 8, a nut 8b is used as shown in FIG. Since other configurations are the same as those of the first embodiment, the same reference numerals are given to the same portions and the description thereof will be omitted.

FIG. 12 shows the present invention as an intermediate rope 5 and a main rope.
It shows an example applied to the fastening of the intersection of three, the second
Instead of an anchor bolt, a normal bolt having the same structure as that of the first tightening tool is used as the tightening tool 9'of No. 1 and is combined with the nut 9b. (A) uses the receiving metal fitting 6 and the pressing metal fitting 7 in the first embodiment,
(B) uses common metal fittings 7'and 7'in the second embodiment.

Illustrated are some non-limiting examples of the invention. 1) The receiving metal fitting 6, the pressing metal fitting 7, and the common metal fittings 7'and 7'may be cut products instead of cast bodies such as cast steel.
Depending on the case, it may be processed by sheet metal. 2) The through hole 12 for the anchor bolt of the receiving fitting 6 may be a female screw hole, and the nut in the above embodiment may be omitted. Further, the anchor bolt may be fixed to the receiving member 6 by welding or the like to omit the nut in the above embodiment. Alternatively, the screw shaft of the bolt may be fixed to the receiving metal fitting 6 by welding or the like, and this may be penetrated through the pressing metal fitting 7, and a nut may be screwed at the tip thereof to form a tightening tool. 3) The rope fitting groove 10, 10 'may have a width that can accommodate ropes of several types of thickness. In that case, it is convenient to engrave a ridge corresponding to the twist of the rope on the bottom of the groove. .

[0023]

Operation of the Embodiment Next, the usage and operation of the embodiment will be described. In the first embodiment, as shown in FIG. 1, the receiving metal fitting 6 is arranged under the intersection of the ropes 3 and 3 ′ stretched vertically and horizontally, and the pressing metal fitting 7 is put on from above. In this way, the vertical rope 3 is fitted into the rope fitting groove 10 of the push fitting 7 in almost half of the cross section, and the horizontal rope 3'is fitted into the rope fitting groove 10 'of the receiving fitting 6 in half of the cross section. .

A bolt as the first tightening tool 8
8a is screwed into the female screw hole 13 of the receiving metal fitting 6 through the through hole 12 of the pressing metal fitting 7, and the anchor bolt as the second tightening tool 9 is passed through the through hole 14 of the pressing metal fitting 7 and the through hole 12 of the receiving metal fitting 6. The lower part (anchor part) is embedded in the ground by hammering. Thus, the fastener 4 including the ropes 3 and 3'is fixed at the fixed position on the slope 1. In the middle of the anchor bolt 9, nuts 9b, 9 that can come into contact with the outer surface side of the receiving metal fitting 6 and the outer surface side of the pressing metal fitting 7 in advance.
b is screwed together.

In the above state, if the bolt 8a is tightened and the nut 9b is tightened, the receiving metal fitting 6 and the pressing metal fitting 7 come close to each other, and the portion exposed from the rope fitting groove of the ropes 3 and 3'is As shown in Fig. 6, it closely contacts the surface of the other metal fitting. The rope fitting grooves 10 and 10 'where the receiving metal fitting 6 and the pressing metal fitting 7 cross each other have a depth of 1/2 or less of the rope cross section to be used. Overlapping intersection 3
0 and 30 'strongly press each other by the tightening.

At this portion, the arcuate recesses 100, 10 are deepest at the intersection and gradually shallower toward both sides.
0's exist in an intersecting shape, and the maximum depth of these recesses 100, 100 'is about twice the depth of the rope fitting groove 10, so that the intersections 30, 30' are recesses 100, 1
It is forcibly bent in the direction perpendicular to the axial direction according to the shape of 00 ', and as shown in FIGS. 4 and 5, the intersecting portion 30' of the vertical rope 3'in the recessed portion 100 'of the receiving metal 6, The intersecting portions 30 of the horizontal ropes 3 are respectively pushed into the recessed portions 100 of the push fitting 7 and tightened in this state. Rope 3,
The intersection of 3'is not just pressed from the top and bottom, but is bent outward in a protruding shape to form a so-called knot, which is the recessed portion 100,
Being enclosed in 100 ', the ropes 3,3' are completely prevented from slipping on each other. Moreover, it can be realized with a relatively small tightening force. Then, the entire intersection is securely locked on the slope 1.

The same effect can be obtained in the second embodiment as well, except that a nut 8b is arranged under the metal fitting 7'on the receiving side and screwed when the bolt 8a is tightened. The advantage of the second embodiment is that it is not necessary to manufacture two kinds of metal fittings, that is, the receiving metal fitting 6 and the pressing metal fitting 7, as in the first embodiment, and one metal fitting having the same configuration may be manufactured. is there. Therefore, the cost of the metal fitting can be reduced.

As a result of actually testing the fastener of the present invention, the receiving metal 6 and the pressing metal 7 are made of cast steel (FCD45).
0), length 95 mm, width 50 mm, thickness 16 mm, rope fitting groove depth 5 mm, R7 mm, maximum recessed portion depth 11 mm, R33 mm.

This fastener has a 2 × 2 structure and a diameter of 12 mm.
The two ropes were crossed and tightened with a tightening torque of 120 N · m. In order to check the performance of the obtained fastening part, a tension load is applied to the rope in a state where the fastening metal fitting is fixed so as not to move, and the fastening force kN (resisting force that does not cause slippage at the intersection of the vertical rope and the horizontal rope) is applied. It was measured.

For comparison, the cast steel (FCD
450), length 95 mm, width 50 mm, thickness 16 m
The same experiment was performed using a metal fitting and a metal fitting having a rope fitting groove depth of 5 mm and a metal fitting. As a result, it was confirmed that the tightening force of the product of the present invention was about 20 kN and that of the conventional product was about 8 kN, and that the tightening force of the same bolt was more than twice as high. This is because the rope intersection is bent and
This is due to the fact that it was encapsulated by 00 and 100 'and became a node to exert resistance to slip.

[0031]

According to the first aspect of the present invention described above, the rope fitting groove 10 of the receiving fitting 6 has the recessed portion 100 at the intermediate portion, and when the rope fitting groove 10 faces the receiving fitting 6, The rope fitting groove 10 'of the pushing metal fitting 7 to be crossed has a recessed portion 100' at an intermediate portion, and the rope intersection portions 30 and 30 'are bent at a direction perpendicular to the axial direction at the recessed portions 100 and 100' and the intersections are formed. Since the parts are respectively pushed into the recessed parts 100 and 100 ', a small bolt tightening force can securely and firmly fasten the crossing part of the rope without slipping, and the structure is simple. The excellent effect that it can be implemented at low cost is obtained.

According to the second aspect, there is an excellent effect that the crossing portion of the rope can be bent without difficulty and surely fastened without slipping. Claim 3
According to the above, since only one type of metal fitting needs to be manufactured, the metal fitting manufacturing cost can be reduced, and since there is no female screw hole and either metal fitting can be the receiving side or the pushing side, it is easy to handle in setting, tightening, etc. The excellent effect that can be obtained is obtained.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of laying a rockfall prevention and landslide prevention net to which a rope crossing fastener according to the present invention is applied.

FIG. 2 is a side view showing a first embodiment of the fastener for rope intersection according to the present invention in a use state.

FIG. 3 is a plan view of the same.

4 is a cross-sectional view taken along the line AB of FIG.

5 is a cross-sectional view taken along the line CD of FIG.

6 is a cross-sectional view taken along the line GH in FIG.

FIG. 7 is a perspective view showing a state of an intersecting portion of ropes in a see-through manner.

FIG. 8 (a) is a plan view of the receiving fitting of the first embodiment,
(B) is a sectional view taken along the line (a) EF, and (c) is a cross-sectional view of (a).
Sectional drawing which follows the JK line, (d) is sectional drawing which follows the rope fitting groove of (a).

FIG. 9 (a) is a plan view of the push fitting of the first embodiment,
(B) is sectional drawing which follows the LM line of (a).

FIG. 10 is a second example of the fastener for rope intersection according to the present invention.
It is a side view which shows an Example in a use state.

FIG. 11 is a plan view showing a disassembled state of the metal fitting of the second embodiment.

FIG. 12 (a) is a side view showing a first example in which the present invention is used for fastening an intersection portion of an intermediate rope, and FIG. 12 (b) is a side view showing a second example.

13 (a) and 13 (b) are side views showing a conventional rope intersection fastening member in use.

[Explanation of symbols] 1 slope 3,3 'rope 4 Intersection fasteners 6 bracket 7 push bracket 7'common metal fittings 8 first fasteners 9 Second tightening tool 10,10 'rope fitting groove 100,100 'recess

Claims (3)

[Claims] 1. A receiving metal fitting 6 and a pressing metal fitting 7 each having a single rope fitting groove 10, 10 'formed on the inner surface and intersecting when they are arranged opposite to each other, and tightening the receiving metal fitting 6 and the pressing metal fitting 7. In a rope crossing fastener including fasteners 8 and 9, the rope fitting groove 10 of the receiving fitting 6 has a recessed portion 100 at an intermediate portion, and the rope fitting groove 10 when facing the receiving fitting 6. The rope fitting groove 10 'of the push metal fitting 7 that crosses with the concave portion 100' is formed in the intermediate portion.
And the rope intersections 30, 30 'are bent in the recesses 100, 100' in a direction perpendicular to the axial direction and the intersections are pushed into the recesses 100, 100 ', respectively. Fastening metal fittings for rope intersections characterized by. 2. The recessed portion 100 is formed such that the intersecting portion is deepest and becomes gradually shallower toward both sides, and the maximum depth is about twice the depth of the rope fitting grooves 10, 10 '. Fastening metal fittings for the rope intersection described in 1. 3. The receiving metal fitting and the pressing metal fitting include common metal fittings 7 ', 7'having the same structure.
A fastener for a rope intersection as described in any of 1.