JP2003206535A - Fastening metal fitting for rope crossing part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fastening metal fitting for a rope crossing part capable of surely fastening the crossing part of a rope, without slipping, by small fastening force with a small structure. <P>SOLUTION: This fastening metal fitting has a receiving metal fitting 6 and a push metal fitting 7 for individually forming crossed rope fitting grooves 10 and 11 on mutually oppositely arranged inside surfaces, and first and second fastening tools 8 and 9 arranged in both side outward positions of the rope fitting grooves 10 and 11 for fastening these receiving metal fitting 6 and push metal fitting 7. Among the rope fitting grooves 10 and 11, one rope fitting groove 11 has the almost uniform depth over the total length, and the other rope fitting groove 10 has a recessed part 100 for allowing bending in the right- angled direction to the shaft direction of crossing rope parts 30 and 30. <P>COPYRIGHT: (C)2003,JPO

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 On slopes along roads, ropes are generally laid in a net shape along the surface of the ground to prevent rock fall and landslides. In the practice of this construction method, conventionally, a large number of ropes are stretched in the vertical and horizontal directions of the slope, 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, as shown in FIG.
A structure in which a plate member is pressed to form a groove a having a semicircular cross section, and a pressing metal member B having a groove b intersecting with the pressing metal B is formed into a two-piece clamp. As shown in FIG. 21 (b), there is known a structure in which a receiving metal fitting A ′ cast including the groove a and a pressing metal fitting B ′ form a two-piece clamp.

In the case of such a clamp system, the required fastening force of the metal fitting used is required to be 1/3 or more of the breaking load of the rope. However, in the prior art, the grooves (lower half, upper half) a and b of the receiving metal fittings A and A'and the pressing metal fittings B and B ', which are opposed to each other, have a uniform depth over the entire length. R and side rope R '
Is the crossed rope part R with about half the cross section
C overlaps with each other at the top and bottom, and only the cross rope portions are pressed against each other by being tightened by screwing the bolt and the nut.

For this reason, the frictional force between the ropes and between the rope and the metal fitting cannot be secured, and a sufficient fastening force that does not cause slippage at the intersections of the ropes cannot be obtained. There is a risk that the grid-like shape composed of ropes and horizontal ropes may collapse, and the effects of rockfall prevention and landslide prevention may not be fully achieved.

In FIG. 21 (b), as a countermeasure for improvement, unevenness is arranged in the groove at a pitch corresponding to the valley of twist of the rope, or a friction coefficient increasing material such as glass powder is intervened. However, it was not effective because the hardness difference between the rope and cast steel was remarkable.

The present invention has been made in order to solve the above problems, and a first object of the present invention is to ensure a compact structure and a small tightening force so as to prevent the rope intersection from slipping. An object is to provide a fastener for rope intersections that can be fastened. A second object of the present invention is to provide, in addition to the first object, a fastening tool for a rope crossing portion which can easily obtain a sufficient fastening force at a site such as a slope even when a large diameter rope is used. To do.

[0008]

In order to achieve the first object of the present invention, a fastening tool for a rope crossing portion of the present invention is a receiving tool and a pushing tool which are arranged opposite to each other and have cross-shaped rope fitting grooves formed on inner surfaces thereof. And a first and a second tightening tool arranged on both outer sides of the rope fitting groove for tightening the receiving fitting and the pressing fitting, and one of the rope fitting grooves has a rope fitting groove over the entire length. It is characterized in that it has a uniform depth, and the other rope fitting groove has a concave portion that allows bending of the intersecting rope portion in a direction perpendicular to the axial direction.

In order to achieve the second object, in the fastener for rope intersections of the present invention, in addition to the above-mentioned structure, the first fastening tool and the second fastening tool are different from the intersection of the rope fitting grooves. It is characterized by being located at a distance.

In any of the inventions, preferably, the recessed portions of the rope fitting groove extend to both sides including the rope crossing point, and each rope fitting groove has a depth of 1/2 or less of the rope cross-sectional area. The recessed portion is formed such that the portion corresponding to the rope intersection is deepest and gradually becomes shallower toward the outside, and the deepest portion is approximately 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 up-down direction and the left-right 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.

A plurality of intermediate ropes 5 are arranged vertically and horizontally between the ropes 3 and 3 ', and the intersections of the intermediate ropes 5 are either the intersection fastening fittings 4 of the present invention or any other fastening. It is fastened with metal fittings.

2 to 9 show a first embodiment of the first mode of the fastener according to the present invention. This embodiment, together with a second embodiment described later, shows a fastener suitable for medium or smaller rope diameters, for example, 12 mm or less in diameter. The fastening metal fitting 4 includes a receiving metal fitting 6 and a pushing metal fitting 7, and is arranged so as to face each other and the ropes 3 and 3 ′ are sandwiched in an orthogonal shape.
The rope crossing portion is fastened by being fastened by the fastening tool 9. The first fastener 8 is a bolt in this example, and the second fastener 9 is
In this example, the anchor bolt 9a and the nut 9b.

FIG. 8 shows the receiving member 6, and in this example, it is made of a casting board which is substantially elliptical or oval in a plan view, and rope fitting grooves 10 and 11 which intersect the inner surface in an X shape.
Is formed so as to reach the edge. The rope fitting grooves 10 and 11 each have an arc-shaped cross section with a width substantially equal to that of the ropes 3 and 3'used and a depth of 1/2 or less of the rope cross section. One rope fitting groove 10 has a recessed portion 100 that appropriately extends on both sides including the rope crossing portion at the bottom of the intermediate region.
The other rope fitting groove 11 does not have the recessed portion 100, has the same depth over the entire length, and the intermediate region communicates with the recessed portion 100 in a form divided by the recessed portion 100.

The recessed portion 100 allows bending of the intersecting rope portion in a direction perpendicular to the axial direction and sealing of the bent portion when tightened by the first tightening tool 8 and the second tightening tool 9. Although the width is the same as that of the rope fitting groove 10, the depth is formed in an arc shape so that the intersecting portion is deepest and becomes gradually shallower toward both sides, and the depth of the deepest portion is the depth of the rope fitting groove 10. It is about twice the depth.

On both sides of the rope fitting grooves 10 and 11 near the outside, through holes 14 for inserting anchor bolts as the second tightening tool 9 and female screws for screwing the bolts as the first tightening tool 8 are inserted. Each hole 13 is provided. In this example, the through hole 14 is provided in the rope fitting groove 10 for weight reduction.
Although it is provided on the thin portion 60 formed on the outer side of the above, it may be thicker like the female screw hole side.

FIG. 9 shows a pressing member 7, which is a casting board having a substantially elliptical or oval shape in plan view, and has rope fitting grooves 10 and 11 intersecting the inner surface in an X shape.
Is formed so as to reach the edge. Rope fitting groove 1
When the push metal fitting 7 is inverted and the receiving metal fitting 6 and the inner surfaces are brought into contact with each other, 0 forms a pair with the rope fitting groove 11 of the metal fitting 6 to form a passage having a substantially elliptical cross section. Further, when the push fitting 7 is inverted and brought into contact with the receiving fitting 6, the rope fitting groove 11 forms a pair with the rope fitting groove 10 of the receiving fitting 6 to form a passage having a substantially elliptical cross section.

The rope fitting grooves 10 and 11 each have an arc shape having a width approximately equal to that of the ropes 3 and 3'to be used and a depth appropriately shallower than 1/2 of the rope cross section. The reference numeral 10 has a recessed portion 100 that appropriately extends on both sides including the intersecting portion. The rope fitting groove 1 on the other side does not have the recessed portion 100, and the inner end communicates with the recessed portion 100 in the form of being divided by the recessed portion 100.

The recessed portion 100 allows the intersecting rope portions 30, 30 to bend at a right angle to the axial direction when tightened by the first tightening tool 8 and the second tightening tool 9.
It is for containing the bent portion and has the same width as the rope fitting groove 10, but the depth is an arc shape so that the intersection is the deepest and becomes gradually shallower toward both sides.
The maximum depth is about twice the depth of the rope fitting groove 10. Since the pressing metal fitting 7 has the same cross-sectional shape as that of (c) and (d) of FIG. 8, these will be referred to.

On both sides of the rope fitting grooves 10 and 11 in the vicinity of the outside, a through hole 12 for inserting a bolt under neck as a first tightening tool 8 and an anchor bolt as a second tightening tool 9 are inserted. Each through hole 14 is provided. In this example, the through holes 12 and 14 are provided in the thin portions 60 and 60 formed on the outer sides of the rope fitting grooves 10 and 11, but it is needless to say that the through holes 12 and 14 may be left thick without being formed. is there.

10 and 11 show a second embodiment of the first aspect. In this embodiment, one set of common metal fittings 7 ', 7'corresponding to the pressing metal fitting 7 of the first embodiment is used. That is, as shown in FIG. 11, the metal fittings are attached to the first tightening tool 8 on both sides of the rope fitting grooves 10 and 11 in the outer vicinity.
Hole 12 for inserting the bolt as the second tightening tool 9
It has a structure in which a through hole 14 for inserting the anchor bolt is provided. The nut 8b is used to tighten the bolt as the first tightening tool 8. 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 an embodiment in which the present invention is applied to the fastening of the intersections of the intermediate ropes 5 and 5 ', and the second fastening tool 9'is not the anchor bolt but the same as the first fastening tool. A normal bolt of construction is used and is combined with the nut 9b. (A) uses the receiving metal fitting 6 and the pressing metal fitting 7 in the first embodiment, and (b) shows the second metal fitting.
The common metal fittings 7'and 7'in the embodiment are used.

In the first and second embodiments, since the ropes 3 and 3'to be used have a medium diameter (usually up to about 12 mm), the second tightening tool 9,
9'has a diameter of about 16 mm, which is similar to that of the first tightening tool 8. Therefore, the tightening torque is
Since it is about 120 N · m, as shown representatively in FIG. 8, the axis 8CL of the first tightening tool 8 (the hole 13 or 12
The distance L2 from the center) to the intersection CL of the rope fitting grooves 10 and 11 is the axis 9CL of the second tightening tool 9 (hole 14).
The distance may be substantially equal to the distance L1 from the center) to the intersection CL of the rope fitting grooves 10 and 11.

FIGS. 13 to 18 show the first embodiment of the second embodiment of the fastener according to the present invention, that is, the diameter of the ropes 3 and 3'used is larger than 14 mm, for example. The diameter of the tightening tool 9, 9'is large, for example, 2
A preferred embodiment is shown when about 4 mm or more is applied.

Also in this embodiment, the receiving metal fitting 6 and the pressing metal fitting 7 are arranged so as to face each other and the ropes 3 and 3'are sandwiched at right angles, and the first tightening tool 8 is placed at a position avoiding this.
By tightening (the bolt in this example) and the second tightening tool 9 (anchor bolt and nut in this example), the intersection portion of the rope is fastened.

Then, rope fitting grooves 10 and 11 intersecting in an X shape are formed on the inner surfaces of the receiving metal fitting 6 and the pressing metal fitting 7 so as to reach the end edges, and the rope fitting grooves 10 and 11 are used respectively. Although it has an arc-shaped cross section with a width almost equal to 3, 3'and a depth of 1/2 or less of the rope cross section,
One of the rope fitting grooves 10 and 11
Has a recessed portion 100 that appropriately extends on both sides including the rope intersection at the bottom of the intermediate region. The other rope fitting groove 11 does not have the recessed portion 100, has the same depth over the entire length, and the intermediate region communicates with the recessed portion 100 in a form divided by the recessed portion 100. This is also similar to the first embodiment of the first aspect.

However, in the first embodiment of the second aspect,
In order to increase the contact area with the ropes 3 and 3 ′ having a large diameter to increase the friction between the ropes, the lengths of the receiving metal fitting 6 and the pressing metal fitting 7 are made larger than in the case of the first embodiment of the first aspect. is doing. For example, in the first embodiment of the first aspect, if length × width is about 95 × 50 mm, then 135 ×
It is set to 50 mm. Further, since the thick bolt 9a is used as the second tightening tool 9 corresponding to the ropes 3 and 3'having a large diameter, the thickness of the receiving metal fitting 6 and the pressing metal fitting 7 is increased so as to withstand the tightening. When the first embodiment of the first aspect is 12 mm, it is set to 18 mm.

Further, the feature of the first embodiment of the second aspect is related to the use of a relatively thick bolt 9a as the second fastening tool 9 as compared with the bolt 8a as the first fastening tool. , The axis 9CL of the second tightening tool 9 (14)
The distance L1 from the center of the hole 14 to the intersection CL of the rope fitting grooves 10 and 11, and the axis 8CL of the first tightening tool 8
Rope fitting groove 10, 1 from (center of hole 13 or 12)
The distance L2 to the intersection CL of 1 is not equalized, and the distance L1
Is larger than the distance L2. That is, axis 8C
L is formed near the intersection CL of the rope fitting grooves 10 and 11, and the axis 9CL is formed at the intersection CL of the rope fitting grooves 10 and 11.
It is formed by displacing it to a position far from.

The distance L1 is the relationship between the thicknesses d1 and d2 (nominal diameters of screws) of the first and second tightening tools and the tightening torque T that can be applied to the second tightening tools by using a tool such as a wrench. The distance L1 / distance L2 is usually set according to
To about 1.5 to 2. When L1 / L2 is less than 1.5, even if a large tightening torque is applied to the second tightening tool, the tightening forces of the first and second tightening tools 8 and 9 become unbalanced and the second tightening tool is tightened. The pushing metal fitting 7 tilts so that the tool 9 side opens upward, and 1 / of the breaking load of the rope
A fastening force satisfying 3 or more cannot be obtained. L1 / L2
When is 2 or more, the receiving metal fitting 6 and the pressing metal fitting 7 become large,
Not only is it disadvantageous in terms of cost, but it is also inconvenient to transport and handle on site.

As a concrete example, for example, the thickness of the first tightening tool is 16 mm, and the thickness of the second tightening tool 9 is 24 m.
m, the tightening torque T of the second tightening tool 9 is 160 N · m
, The distance L2 is 31.5 mm and the distance L1 is 6
A balance of 1.5 mm improves the balance. Since other configurations are similar to those of the first embodiment of the first aspect, the description will be incorporated and the same reference numerals will be given to the same portions.

19 and 20 show a second embodiment of the second aspect. In this embodiment, one set of common metal fittings 7 ', 7'corresponding to the pressing metal fitting 7 of the first embodiment is used. That is, as shown in FIG. 19, each metal fitting is provided with a first tightening tool 8 on both sides of the rope fitting grooves 10 and 11 near the outside.
Hole 12 for inserting the bolt as the second tightening tool 9
It has a structure in which a through hole 14 for inserting the anchor bolt is provided. Then, as shown in FIG. 20, the nut 8b is used to tighten the bolt as the first tightening tool 8. Since other configurations are similar to those of the first embodiment of the first aspect, the same reference numerals are given to the same portions and the description thereof will be omitted. Although not shown, the second mode is also applied to the fastening of the intersecting portions of the intermediate ropes 5 and 5 ′ similarly to the first mode.

Illustrated are some non-limiting examples of the present invention. 1) Receiving metal fitting 6, push metal fitting 7, common metal fittings 7 ', 7'
Instead of a cast body such as cast steel, a cut product may be used, or in some cases, a sheet metal processed product. 2) The through hole 14 of the receiving member 6 may be a female screw hole, and the nut in the above embodiment may be omitted. Alternatively, an anchor bolt serving as a tightening tool 9 may be fixed to the receiving fitting 6 by welding or the like to omit the nut in the above embodiment.

Further, 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 grooves 10 and 11 may have a width that can accommodate ropes of several types of thickness, and in that case, it is convenient to engrave a ridge corresponding to the twist of the rope on the bottom of the groove.

[0034]

Operation of the Embodiment Next, the usage and operation of the embodiment will be described. In the first embodiment of the first aspect, the receiving metal fitting 6 is provided below the intersection of the ropes 3 and 3 ′ stretched horizontally and vertically as shown in FIG.
And place the metal fitting 7 from above. In this way, the ropes 3 and 3'are fitted into the rope fitting grooves 10 and 11 which are elliptical when the receiving metal fitting 6 and the pressing metal fitting 7 are formed in a cross shape, and approximately 70 to 80% of the cross section thereof is fitted. .

Then, the bolt 8a serving as the first tightening tool 8 is screwed into the female screw hole 13 of the receiving fitting 6 through the through hole 12 of the pressing fitting 7, and the anchor bolt serving as the second tightening tool 9 is pressed. The lower portion (anchor portion) is embedded in the ground through the through hole 14 of 7 and the through hole 14 of the metal fitting 6. The rope crossing fastener 4 including the ropes 3 and 3'is now fixed in place on the slope 1.
In the middle of the anchor bolt 9, nuts 9b, 9b capable of contacting the outer surface side of the receiving metal fitting 6 and the outer surface side of the pressing metal fitting 7 are screwed in advance.

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. Since the rope fitting grooves 10 and 11 have a depth of 1/2 of the cross section of the ropes 3 and 3 ′ to be used, or an appropriately shallow depth, the crossing portions 30 and 30 that overlap the ropes 3 and 3 ′ above and below each other. Press firmly to engage each other.

In this portion, the arcuate recesses 100, 100 are deepest at the intersection and gradually shallower toward both sides.
Exists in an intersecting shape with the receiving metal fitting 6 and the pressing metal fitting 7, and the maximum depth of the recessed portions 100, 100 is about twice the depth of the rope fitting groove 10, so that the intersecting portions 30, 30 are By the pressing, the concave portions 100 are bent and deformed in a direction perpendicular to the axial direction according to the shapes of the recessed portions 100, as shown in FIGS. 4 and 5.
Forcibly pushed into the upper and lower recesses 100, 100,
It is fastened as shown in FIGS. 2 and 7. Since the intersections of the ropes 3 and 3'are not only pressed from above and below but also bent outward in a protruding manner and are enclosed in the recessed portions 100 and 100, the ropes 3 and 3'are mutually connected by the joint action. Slip is completely prevented. At the same time, since the meshing of the intersections of the ropes 3 and 3'is improved, the contact surface is further increased and the friction between the ropes is increased. Then, the entire intersection is securely locked on the slope 1.

Also, the intersections 30 and 3 of the ropes 3 and 3 '
The part from 0'to the upper part is also in close contact with the upper and lower rope fitting grooves 10 and 11, and about 70 to 80% of the cross-sectional area is surrounded. Therefore, also in this part, a fastening force can be obtained by friction, and a firm right-angled intersection is obtained. The morphology is formed and left-right misalignment is completely prevented. Further, in the conventional fastening metal fitting, as shown in FIG. 21, since the intersections of the ropes are overlapped with each other in a straight line, the levels of the vertical and horizontal ropes are laid differently, so that the ropes are floated from the surface of the earth in the intersection area. However, in the present invention, since the intersecting portions 30, 30 of the ropes 3, 3 ′ are bent outward in a protruding shape and are contained in the recessed portions 100, 100, as shown in FIG. Rope 3,3 '
Will be laid at the same level. Therefore, the area where the ropes intersect is also close to the surface of the ground, and the effect of holding down landslides and floating stones can be ensured.

The same effect can be obtained in the second embodiment of the first aspect, except that a nut 8b is arranged below the metal fitting 7'on the receiving side and screwed when the bolt 8a is tightened. The advantage of this second embodiment is that it is not necessary to manufacture two types 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 structure as the pressing metal fitting 7 can be manufactured. Therefore, the cost of the metal fitting can be reduced.

The results of a field test of the fastener for a rope intersection of the present invention are shown. The structure shown in the second embodiment is used, and it is made of cast steel (FCD450), length 95 mm, width 5
0 mm, thickness 16 mm, rope fitting grooves 10 and 11 depth 5 mm, R7 mm, the maximum depth of the recess 100 is 11
mm, R33 mm specifications.

Tightening torque 1 was obtained by intersecting 2 × 2 ropes with a diameter of 12 mm with the fastener for crossing the rope.
Signed at 20 N ・ m. In this test, not the anchor bolt but the two bolts (nominal diameter M16 of the screw) and the nut shown in Fig. 12 (b) were used for tightening, and the rope crossing fastener was fixed so that it would not move. Then, a tensile load was applied to the rope and the fastening force (a resistance force at which the vertical rope and the horizontal rope did not slip at the intersection) kN was measured.

For comparison, a rope fitting groove made of cast steel (FCD450) having a length of 95 mm, a width of 50 mm, a thickness of 12 mm and a depth of 5 mm is formed diagonally on the metal fittings and the metal fittings at a right angle when facing each other. The same experiment was carried out using a conventional product that was made to obtain parts. As a result, it was confirmed that the tightening force of the product of the present invention was 27.8 kN and that of the conventional product was 8 kN, and a tightening force of 3 times or more could be obtained with the same bolt tightening force. This is because the crossing portion of the rope was bent, and it was enclosed by the recessed portions 100, 100 to serve as a node and exert resistance to slip.

Next, thick ropes 3 and 3'having a diameter of 14 mm or more are used. In order to obtain a high anchoring force in response to this, the second tightening tool 9 is thicker than the first tightening tool 8. When a diameter specification is used, the fastening force of the metal fitting P (N)
Is a formula k · T / d (k: torque coefficient, T: tightening torque N · m, d: nominal diameter of screw mm), and is therefore inversely proportional to the nominal diameter d of the screw. Therefore, it becomes necessary to introduce a strong tightening torque to the second tightening tool 9, and when the distance between the second tightening tool 9 and the first tightening tool 8 is equal from the intersection of the rope fitting grooves 10 and 11, It becomes difficult to introduce the required torque by manual operation using a wrench,
The receiving metal fitting 6 and the pressing metal fitting 7 are not close to equilibrium, and the second tightening tool side is likely to be in an open unbalanced state.

However, in the second mode, the distance L1 from the axis 9CL of the second tightening tool 9 (14) (center of the hole 14) to the intersection CL of the rope fitting grooves 10 and 11 is
The distance from the axis line 8CL (center of the hole 13 or 12) of the first tightening tool 8 to the intersection CL of the rope fitting grooves 10 and 11 is made larger than L2. Therefore, the lever action increases the fastening force of the second fastening tool 9 as a moment, and compensates for the shortage of the fastening force. Therefore, a sufficient tightening torque can be introduced by manual operation using a wrench, and the required fastening force can be obtained in a well-balanced manner in which the receiving metal fitting 6 and the pressing metal fitting 7 are close to each other in equilibrium.

As the receiving metal 6 and the pressing metal 7, 135 ×
50mm x 18mm size, rope fitting groove 10,
The distance L1 from the intersection 11 to the center of the anchor bolt as the second tightening tool 9 is 61.5 mm, and the distance L2 from the intersection of the rope fitting grooves 10 and 11 to the center of the tightening bolt as the first tightening tool 8. Is set to 31.5 mm, M24 is used as the second tightening tool 9, and M16 is used as the first tightening tool 8.
This wire rope was fitted into the rope fitting grooves 10 and 11 and fastened with a wrench having a length of 0.5 m. As a result, 160N
・ It was possible to obtain a fastening force of 35 kN or more in m.

[0046]

According to the first aspect of the present invention described above, the excellent effect that the crossing portion of the rope can be securely fastened without slippage by a small size and a small tightening force can be obtained.

According to the second aspect, it is possible to obtain an excellent effect that, when a rope having a normal diameter is used, the intersecting portion can be firmly fastened with a small tightening force. According to claim 3, the fastening force can be increased as a moment to compensate for the lack of fastening force. Therefore, when a rope with a large diameter is used, the crossing portion can be firmly fastened with a small fastening force, which is an excellent effect. can get. According to the fourth and fifth aspects, an excellent effect is obtained in that the intersection portion of the rope can be bent and contained without difficulty without fail. According to the sixth aspect, since only one kind of metal fitting needs to be manufactured, the metal fitting manufacturing cost can be reduced and the handling can be facilitated, which is an excellent effect.

[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 first aspect of the present invention in use.

FIG. 3 is a plan view of the first embodiment of the first aspect.

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 line LM of (a), (c) is a sectional view taken along line JK of (a), and (d) is A- of (a).
It is sectional drawing which follows the B line.

FIG. 9 (a) is a plan view of the push fitting of the first embodiment,
(B) is a sectional view taken along the center line.

FIG. 10 is a side view showing a second embodiment of the first aspect of the present invention in use.

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

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.

FIG. 13 is a side view showing the first embodiment of the second aspect of the present invention in use.

FIG. 14 is a plan view of the first embodiment of the second aspect.

FIG. 15 is a plan view of the receiving member of the first embodiment of the second aspect.

16A is a sectional view taken along line L′-M ′ in FIG. 15, FIG. 16B is a sectional view taken along line J′-K ′ in FIG.
FIG. 16C is a sectional view taken along the line A′-B ′ of FIG. 15.

FIG. 17 is a plan view of the pressing member of the first embodiment of the second aspect.

18 is a sectional view taken along the center line of FIG.

FIG. 19 is a plan view showing a disassembled fitting of the second embodiment of the second aspect.

FIG. 20 is a side view showing a second embodiment of the second mode in use.

21 (a) and 21 (b) are side views showing a conventional rope intersection fastening metal fitting 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, 11 rope fitting groove 30 crossing rope part 100 recess

Claims (6)

[Claims] 1. A receiving metal fitting 6 and a pressing metal fitting 7, which are arranged opposite to each other and have cross-shaped rope fitting grooves 10, 11 respectively formed on the inner surfaces, and a rope fitting groove 10, for tightening the receiving metal fitting 6 and the pressing metal fitting 7. 1st placed on both sides of 11
And the second tightening tools 8 and 9, and the rope fitting groove 1 is provided.
One of the rope fitting grooves 0, 11 has a substantially uniform depth over the entire length, and the other rope fitting groove 10 allows bending of the intersecting rope portions 30, 30 in a direction perpendicular to the axial direction. A fastener for a rope intersection, which has a recess 100. 2. The fastener for rope intersections according to claim 1, wherein the first and second fasteners 8 and 9 are located at substantially the same distance from the intersections of the rope fitting grooves 10 and 11. 3. A first fastening tool 8 and a second fastening tool 9,
The fastener for rope intersections according to claim 1, wherein the fasteners are located at different distances from the intersections of the rope fitting grooves 10, 11. 4. A recessed portion 100 of the rope fitting groove 10, 10.
The fastening fitting for rope intersection according to any one of claims 1 to 3, wherein 100 extends on both sides including a rope intersection. 5. The rope fitting grooves 10, 11 have a depth of 1/2 or less of the rope cross-sectional area, and the recessed portion 100 is deepest at the portion corresponding to the rope intersection, and gradually becomes shallower toward the outside. The rope crossing fastener according to any one of claims 1 to 4, wherein the deepest part of the rope fitting groove is approximately twice the depth of the rope fitting groove 10. 6. The fastening metal fitting for a rope intersection according to claim 1, including a case where the receiving metal fitting and the pushing metal fitting are common metal fittings 7 ', 7'having the same structure.