JP2006161353A - Rope intersection fastening fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rope intersection fastening fitting which has a simple structure, and can rigidly fasten a rope intersection with high fastening efficiency only by operating a single nut. <P>SOLUTION: The rope intersection fastening fitting has a saddle fitting 3 which can straddle spaces which are defined by orthogonally extending ropes and located so as to be diagonally opposed to each other; an L-shaped bolt 4 which has its head located at a longitudinal end of the saddle fitting 3, and enwraps the intersection of the ropes from below, to thereby protrude its distal end to the other end of the saddle fitting 3; and the nut 5 which is screwed onto the distal end 4 of the L-shaped bolt protruding to the other end of the saddle fitting 3, to thereby fasten the ropes to each other at the rope intersection. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a metal fitting for fastening an intersection of ropes used in a rockfall protection facility or the like.

For slopes where there is a risk of falling rocks, protection facilities are often installed by laying ropes vertically and horizontally on the target slope. In such cases, it is essential that the intersecting ropes are tightly fixed at the intersection so that the size of the eyes does not change.
As shown in FIGS. 10 (a) and 10 (b), as shown in FIGS. 10 (a) and 10 (b), a plate P is applied to the upper rope R1 of the rope intersection, and two U bolts Q and Q are attached from the lower side as a means for tightly fixing the intersection of the rope And the lower rope R2 is supported, and nuts S and S are screwed into the protruding ends of the U bolts Q and Q, respectively, and tightened.
In this structure, in order to fasten and fix the rope, it is necessary to alternately and repeatedly fasten the four nuts S. Therefore, there is a drawback that it takes a lot of time for mounting. In addition, it is difficult to tighten the four nuts to an equal strength, and there is a drawback that the tightening force varies and an unbalanced tightening state is likely to occur.

  As a countermeasure, the tops of a pair of leg pieces whose side surfaces are J-shaped are integrated at the connecting part, and a bolt having a holding piece at the lower end is threaded through the connecting part to hang down to the J-shaped leg piece. A metal fitting has been proposed in which a side rope is hooked and supported, and the upper rope that intersects the rope is pressed by a presser piece that is lowered by the rotation of a bolt to tighten the rope.

According to this prior art, it does not take much time because the tightening may be performed for one bolt, but when the bolt is tightened, the J-shaped leg piece expands to the left and right along with the deflection of the rope. There was a problem that the fastening efficiency was poor and could only be obtained about 3 kN at most. Moreover, since the deformation of the opening of the mouth is visually recognized from the outside, there is a problem that it is forced to replace at the time of inspection.
Japanese Patent Laid-Open No. 2001-140821

  The present invention has been made to solve the above-described problems, and the object of the present invention is to provide a simple structure capable of tightening and fixing a rope crossing portion only by operating a single nut with high fastening efficiency. Is to provide metal fittings.

  In order to achieve the above object, the present invention provides a saddle-shaped bracket capable of straddling an oblique diagonal space between orthogonal ropes, and an intersection of ropes with a head located at one longitudinal end of the saddle-shaped bracket and an intermediate portion. Is inserted from the lower side, and the rope is engaged with the L-shaped bolt whose tip is projected to the other end of the saddle-shaped bracket and the L-shaped bolt distal end projected to the other end of the saddle-shaped bracket. It is characterized by having a nut for tightening the intersection.

  According to the present invention, a simple operation is sufficient in that the crossing portion of the rope is obliquely straddled, and the nut is screwed onto the other end of the L-shaped bolt with the rope intersection pointed from below, and the tightening is 1 Since there are only locations, construction costs can be reduced by shortening the work time. In addition, there is no forgetting to tighten or unbalanced tightening, and the fastening efficiency is high, so that stable performance can be obtained.

  Preferably, the saddle-shaped metal fitting has a pair of opposed side walls integrally including a top wall and a front leg portion and a rear leg portion that extend downward and obliquely downward from the edge in the width direction of the top wall. And the rear leg each have a space through which the shaft portion of the L-shaped bolt can be inserted, the front leg has a concave seating surface facing the bolt head, and the rear leg has a convex surface facing the nut. A seating surface is provided.

  According to this configuration, it is possible to prevent the rope from coming off from the saddle-shaped metal fitting, and to maintain the correct crossing state, to accurately guide the scooping action of the L-shaped bolt, and for the front leg portion to be a bolt. Since it has a concave seating surface facing the head and a convex seating surface with the rear leg facing the nut, the bolt can be changed even if the rope size changes due to the automatic adjustment effect and the bolt position changes. Is perpendicular to the tangent to the seat surface of the saddle-shaped metal fitting, and the rope crossing portion can be firmly tightened at the bent center portion of the L-shaped bolt. Therefore, it is possible to cope with a wide range of rope diameters with a single metal fitting.

In order to prevent parallelization of the ropes, the opposite side wall hangs a barrier that can come into contact with the side of the crossing rope at an intermediate position.
According to this, it is possible to accurately prevent the rope from rotating from the orthogonal state to the parallel direction during tightening and coming off the saddle-shaped bracket.
Instead of the above configuration, the shaft portion of the bolt has a cross-shaped groove that fits the lower rope in the middle portion, and the opposite side wall is adjacent to the two recessed portions that can contact the upper rope at the lower end Is also suitable.
According to this, the cross-shaped groove and the two recessed portions can secure the cross-section in a stable manner, and at the same time, the behavior in which the rope rotates in the direction from the orthogonal state to become parallel is accurately determined. Can be prevented. In addition, since the saddle-shaped metal fitting has a simple shape, the production cost can be reduced.

The front leg part has a shaft part escape prevention part of the L-shaped bolt in the gap at the tip.
According to this, the L-shaped bolt can be stably held on the saddle-shaped metal fitting at all times, so that there is no risk of loss and the operation can be performed easily and quickly.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIGS. 1 to 4 show a first embodiment of a rope crossing portion fastener according to the present invention. Reference numerals 1a and 1b denote wire ropes which are arranged so as to intersect at right angles (cross shape). 10 is the intersection.
Reference numeral 2 denotes a rope crossing portion fastening bracket according to the present invention, which is basically arranged so as to reach the diagonal spaces K and K facing each other across the crossing portion 10 of the crossing wire ropes 1a and 1b from above. The saddle-shaped metal fitting 3 and the L-shaped bolt 4 which is combined with the saddle-shaped metal fitting 3 and presses against the saddle-shaped metal fitting 3 from below and the saddle-shaped metal fitting 3 cooperate with the saddle-shaped metal fitting 3 And a nut 5 for tightening the intersection 10 is provided.

The saddle-shaped metal fitting 3 has a ceiling wall portion 3a having a length that can reach the level of the diagonal spaces K, K that are opposed to each other beyond the intersection 10 when viewed from above, and from both ends in the width direction of the ceiling wall portion 3a. It has a pair of opposing side walls 3b and 3b that descend at right angles.
The opposing side walls 3b and 3b have a front leg portion 30 extending downward at one end in the longitudinal direction, and a rear leg portion 31 extending downward at the other end in the longitudinal direction. The opposing side wall lower edge part between the lower edge parts of the front leg part 30 and the rear leg part 31 is an arcuate concave surface 37 with which the upper wire rope 1a can come into contact.

At least one of the front leg portion 30 and the rear leg portion 31 is in contact with the side surface of the wire rope with an inner edge and prevents the wire rope from coming off, so that the lower side when set in the diagonal spaces K and K facing each other. It has a height that can reach below half the diameter of the wire rope 1b.

Between the opposing side walls 3 b and 3 b including the front leg portion 30 and the rear leg portion 31, a gap 32 having approximately the same diameter as the shaft portion diameter of the L-shaped bolt 4 is formed. Further, on the opposing side wall portion corresponding to the substantially intermediate position between the front leg portion 30 and the rear leg portion 31, there are parallel blocking preventing barriers 33, 33 that can come into contact with the wire ropes 1a, 1b whose width direction side surfaces intersect. It is drooping. As shown in FIG. 4, the barriers 33, 33 extend downward from the opposing side walls 3 b, 3 b via a horizontal relatively short projecting portion 330.
The upper edges of the front leg portions 30 and 30 are formed with seating surfaces 300 and 300 that are recessed in an arc shape from a front end to a required range (or the whole). Further, the upper edge portion of the rear leg portion 31 is formed with seating surfaces 310, 310 which are convex in an arc shape from a front end to a required range (or the whole).
The saddle-shaped metal fitting 3 is made, for example, by pressing or casting a steel material, or by welding a half of the width direction center of the top wall portion 3a in the length direction.

The L-shaped bolt 4 has a head portion 40 and a shaft portion 41, and a male screw 410 is provided in a required range from the tip of the shaft portion 41. Then, it is bent at an angle α of approximately 90 degrees from the middle of the shaft portion 41, and the lower wire rope 1b is held by the bent portion 420.
The bolt head 40 may be directly mounted on the recessed seating surfaces 300, 300 of the front legs 30, 30, in order to obtain the stability of tightening and at the same time easily adjust the position according to the rope diameter. In this embodiment, the washer 6 is interposed between the head 40 of the L-shaped bolt 4 and the recessed seating surfaces 300 and 300 of the front legs 30 and 30. The washer 6 has an insertion hole for the shaft portion 41 at the center, and has bent side walls 60 and 60 that fit on the outer surfaces of the front leg portions 30 and 30 on the left and right sides, and has a groove shape as a whole.

In order to keep the L-shaped bolt 4 on the saddle-shaped metal fitting 3 at all times, an escape prevention portion 302 of the shaft portion 41 is provided at the projecting ends of the front leg portions 30 and 30. The escape prevention portion 302 may be a connecting wall that connects the protruding ends of the front leg portions 30 and 30, but in this example, as shown in FIG. 2, the claw bent inwardly into the gap so as to have a width w narrower than the size of the gap 32. It consists of.
Further, a flat washer 7 is interposed between the nut 5 and the convex seating surfaces 310, 310, or a nut with a washer is used.

Next, the usage and operation of the first embodiment will be described. When assembling the metal fitting, the washer 6 is inserted from the tip of the shaft portion 41 with the L-shaped bolt 4 alone, and is brought into contact with the head 40. In this state, the L-shaped bolt 4 is inserted from the gap 32 of the front legs 30, 30, and the bent side walls 60, 60 of the washer 6 are fitted on the front legs 30, 30.
Since the shaft portion 41 of the L-shaped bolt 4 is prevented from coming off from the front leg portions 30 and 30 by the escape prevention portion 302, the L-shaped bolt 4 is assembled in advance with the saddle-shaped metal fitting 3 in advance, so that handling is easy. The L-shaped bolt 4 is maintained in a so-called open state in which the shaft portion 41 is largely separated from the lower edges of the opposite side walls 3b and 3b as indicated by the solid line in FIG.

  In use, the saddle-shaped metal fitting 3 is straddled from the upper side to the diagonal spaces K, K facing each other of the orthogonal ropes 1a, 1b. At this time, the parallelization prevention barriers 33, 33 advance into the diagonal spaces K ′, K ′ facing each other of the ropes 1a, 1b at positions displaced by 90 degrees. At this time, the saddle-shaped metal fitting 3 may be inclined so that the rear leg portions 31 and 31 enter the space K, and then be made horizontal, and the L-shaped bolt 4 is connected to the lower wire rope at the intersection 10. The shaft portion 41 extends in a crossing manner below 1b, and the setting is completed.

  If, for example, the head 40 of the L-shaped bolt 4 is grasped and tilted in this state, the L-shaped bolt 4 holds the lower rope 1b of the intersecting portion 10 at the bent portion 420 as shown by the phantom line in FIG. The tip part of the shaft part projects to the upper edge side of the rear leg parts 31 and 31 as shown by the phantom line in FIG. In this state, if the nut 5 is screwed to the tip of the shaft portion via the washer 7 and is rotated until the lower surface of the nut is in strong contact with the convex seat surfaces 310 and 310 via the washer 7, the crossing portion 10 is 2. Fastened and fixed as shown in FIG. Therefore, the work is very easy.

The upper wire rope 1a in the vicinity of the intersection 10 is divided into a space defined by a front leg 30 and a parallelization prevention barrier 33, and a space defined by a rear leg 31 and a parallelization prevention barrier 33. While being prevented from shifting in direction, it is in close contact with the lower edges of the opposite side walls 3b, 3b.
Further, the lower wire rope 1b has a left-right direction defined by a space defined by the front leg 30 and the parallelization prevention barrier 33 and a space defined by the rear leg 31 and the parallelization prevention barrier 33. While being prevented from shifting, the bent portion 420 of the L-shaped bolt shaft portion is pressed upward from below.
Therefore, the rope does not rotate in a direction to be parallel from the orthogonal direction, and the opposing side walls 3b and 3b are not deformed (opened), and the crossing portion 10 is formed with a high fastening efficiency of 5 kN or more although it is a single bolt type. BDSM can be fixed.

There are various combinations of rope sizes that are orthogonal to each other, and it is uneconomical to prepare the saddle-shaped metal fitting 3 for each of these sizes. In the present invention, the seat surfaces of the front leg portions 30, 30 with respect to the head 40 of the L-shaped bolt 4 are recessed seat surfaces 300, 300, and the seat surfaces of the rear leg portions 31, 31 corresponding to the nut 5 are convex. It becomes the shape seat surface 310,310.
Therefore, as shown in FIG. 6 used for tightening the crossing portion of the wire rope thinner than the example of FIG. 3, the distance between the bent portion of the L-shaped bolt 4 and the lower edge of the bent side wall of the saddle-shaped metal fitting 3 is set according to the rope size. Even if it is moved up and down, it can be automatically adjusted so that the axis C of the L-shaped bolt 4 is orthogonal to the tangent to the bearing surface, and a wide range of rope sizes can be handled with a single fitting.
Since the washer 6 contacts the recessed seating surfaces 300 and 300 at four points, when the rope size changes, the shaft portion 41 of the L-shaped bolt 4 can be easily shifted in accordance with this and the crossing portion 10 is held. When the nut 5 is tightened, the washer 7 is automatically displaced so as to be aligned with the tangent line of the convex seating surfaces 310 and 310. Therefore, work is also easy.

7 and 8 show a second embodiment of the present invention.
In this embodiment, grooves 421 and 421 are formed in the bent portion 420 of the L-shaped bolt 4 so as to cross in an X shape when viewed from above. The cross grooves 421 and 421 are made by cutting, pressing or casting. On the side surface of the groove, a mountain-shaped protrusion 422 is formed at the center.
In addition, two arc-shaped recessed portions 37 on which the upper wire rope 1a can abut on the lower edge portions of the opposing side walls 3b, 3b between the front leg portion 30 and the rear leg portion 31 of the saddle-shaped metal fitting 3 are provided. , 37 are formed so as to be adjacent to each other with a downward mountain-shaped protrusion 371 in the center.
Since the remaining structure is the same as that of the first embodiment, it will be used, and the same reference numerals will be given to the same parts.

In this second embodiment, if the L-shaped bolt 4 is tilted from the open state, the lower rope 1b of the intersecting portion 10 is held by the bent portion 420, but the groove crossed in the X shape in the bent portion 420 Since there are 421 and 421, the lower rope 1b of the crossing rope fits into one of them about half a cross section. Accordingly, the side escape of the rope does not occur, and it is in a state where it is precisely within the specified position of the bent portion. If the L-shaped bolt 4 is tilted clockwise in the gap and the nut 5 is screwed onto the tip of the shaft, the upper rope 1a is cross-shaped (for example, 1) on the recessed portions 37, 37 of the opposite side walls 3b, 3b. The opposite side wall 3b is passed to the left recessed portion 37, and the other opposed side wall 3b is passed to the right recessed portion 37) for positioning.

Therefore, if the nut 5 is rotated until it is in strong contact with the convex seat surfaces 310, 310, the intersecting portion 10 is fastened and fixed as shown in FIGS. Therefore, the work is very easy.
The upper wire rope 1a in the vicinity of the intersecting portion 10 is in close contact with the lower edge recessed portions 37, 37 of the opposing side walls 3b, 3b while preventing the lateral displacement by the protrusions 371, 371. Further, the lower wire rope 1b is pressed upward from below while being fitted into one cross-shaped groove 421 provided with the bent portion 420 of the L-shaped bolt shaft portion, and the left and right directions are formed by the central protrusion 422. Deviation is prevented.
Therefore, the rope does not rotate in a direction to be parallel from the orthogonal direction, and the opposing side walls 3b and 3b are not deformed (opened), and the crossing portion 10 is formed with a high fastening efficiency of 5 kN or more although it is a single bolt type. BDSM can be fixed.

Since the two left and right recessed portions 37 and 37 and the cross grooves 421 and 421 are provided, even if the relationship between the upper wire rope and the lower wire rope shown in the figure is reversed, the present invention can be applied without any problem. .
Further, in this embodiment, since the shape of the saddle-shaped metal fitting 3 can be simplified, the manufacturing cost can be reduced, and the bent portion 420 of the L-shaped bolt 420 and the opposite side wall by the depth of the cross grooves 421 and 421. Since the space | interval of the lower edge recessed part 37 of 3b, 3b can be made small, there exists an advantage which can raise tightening efficiency and can reduce the rotation amount of a nut.

It is a perspective view showing a 1st example of a rope crossing part fastening metal fitting of the present invention in use condition. It is a top view of a use condition. It is a vertical side view of a use state. It is sectional drawing which follows the XX line of FIG. It is a vertical side view which shows the state change at the time of a use start. It is a vertical side view which shows the state which fastened the rope from which size differs. It is a perspective view which shows the 2nd Example of the rope crossing part fastening metal fitting of this invention in a use condition. It is a vertical side view of the use condition of 2nd Example. It is a perspective view of the volt | bolt of 2nd Example. (A) is the side view which shows the conventional rope crossing | fastening part fastening metal fitting in use condition, (b) is the front view.

Explanation of symbols

1a, 1b Crossed wire rope 2 Rope crossing portion fastening bracket 3 Saddle-shaped bracket 4 L-shaped bolt 5 Nut 6, 7 Washer 10 Crossing portion 3a Top wall 3b, 3b Opposite side wall 30, 30 Front leg portion 31, 31 Rear leg portion 33, 33 Barrier for preventing parallelization 37.37 Recessed portion 40 Head portion 41 Shaft portion 300 Concave seat surface 302 Shaft portion escape prevention portion 310 Convex seat surface 371 Projection portion 421, 421 Cross-shaped groove

Claims (5)

  A saddle-shaped bracket capable of straddling an oblique space between orthogonal ropes, a head located at one end in the longitudinal direction of the saddle-shaped bracket, and an intermediate portion holding the intersection of the ropes from below, An L-shaped bolt projecting to the other end of the saddle-shaped bracket; and a nut for tightening a rope intersection by screwing with an L-shaped bolt tip projecting to the other end of the saddle-shaped bracket. Rope crossing fasteners that do things.   The saddle-shaped metal fitting has a pair of opposing side walls integrally including a top wall and a front leg portion and a rear leg portion extending downward and obliquely downward from the edge in the width direction of the top wall, and the front leg portion and the rear leg portion forming a pair Are provided with a space through which the shaft portion of the L-shaped bolt can be inserted, and the front leg portion is provided with a concave seating surface facing the bolt head, and the rear leg portion is provided with a convex seating surface facing the nut. The rope crossing portion fastening bracket according to claim 1, wherein:   The rope crossing fastener according to claim 1 or 2, characterized in that, in order to prevent parallelism of the ropes, the opposing side wall hangs a barrier capable of contacting the side of the crossing rope at an intermediate position thereof. .   The shaft portion of the bolt has a cross-shaped groove for fitting the lower rope in the middle portion, and the opposite side wall is provided with two recessed portions adjacent to the upper rope at the lower end. Item 3. The rope crossing portion fastening bracket according to item 1 or 2.   The rope crossing portion fastening bracket according to claim 1, further comprising an L-shaped bolt shaft escape prevention portion at a front end of the front leg portion.

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