JP2001140990A - Eire rope fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire rope fixture capable of more tightly fixing a wire rope. SOLUTION: When bolts 30 are fastened, a recessed part 12 is elastically deformed inward. A wire rope 7 is pressed from the right and left by the elastic deformation. Force to be applied to the wire rope 7 at this time is shown by 50, 60 in the figure. Accordingly, the wire rope 7 is fixed by receiving forces from above, below right and left.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rope fixing device used for fixing a wire rope at a construction site or the like, that is, a so-called rope clip.

[0002]

2. Description of the Related Art A wire rope fixing device called a rope clip is used as a means for fixing an end portion of a wire rope in a construction machine such as a crane for lifting a heavy object with the wire rope. FIG. 7A is a diagram of the crane boom 6 viewed from the side. As shown in the figure, the portion of the wire rope 1 from the hook 2 to the rope socket 5 and the wire rope 1
A rope clip 4 is used to fix two overlapping wire ropes 1 at an overlapping portion 3 where a portion which is folded back and extends downward overlaps.

FIG. 7B is a view of the rope clip 4 to which the wire rope 1 is fixed as viewed from the axial direction of the wire rope 1 (the wire rope 1 is a sectional view). The rope clip 4 includes a saddle 4a, a U bolt 4b, and two nuts 4c.
Here, male threads are formed at the tip portions of the two feet of the U bolt 4b, and two through holes through which these two feet are inserted are formed in the saddle 4a. In the through hole of the nut 4c, a female screw to be screwed with the male screw at the tip of the foot of the U bolt 4b is formed. In such a configuration, the overlapping portion 5 of the wire rope 1 to be fixed is
Is accommodated between the two feet of the U-bolt 4b, and the tip of each foot is inserted into two through holes in the saddle 4a. Then, two nuts 4c are screwed and fastened to the respective ends of the two feet of the U bolt 4b penetrating the saddle 4a.
As a result, the overlapping part 5 of the wire rope 1 is strongly sandwiched and fixed by the U bolt 4b and the saddle 4a. Numeral 6 shows the force applied from the outside to the wire rope 1 when it is fixed as a vector.

[0004]

By the way, in the conventional rope clip 4, the wire rope 1 is attached to the U-shaped
There is a problem that the wire rope 1 may come off from the rope clip 4 when a large force is applied in the axial direction of the wire rope only by pressing the bolt in the direction of the bolt 4b. The present invention has been made in view of the above-described circumstances, and has as its object to provide a wire rope fixing device capable of fixing a wire rope more firmly.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 has a first portion having a curved portion through which a wire rope is inserted and flat portions provided at both ends of the curved portion. A second member fixed to the flat portion with the wire rope sandwiched between the member and the inside of the curved portion
And a fixing means for pressing and fixing the flat portion of the first member and the second member to each other, thereby providing a wire rope fixing tool.

According to a second aspect of the present invention, in the wire rope fixing device of the first aspect, the second member has a projecting portion inserted into the curved portion of the first member. And a wire rope fixing tool.

According to a third aspect of the present invention, there is provided the wire rope fixing device according to the second aspect, wherein a top portion of the projecting portion is concavely curved. .

According to a fourth aspect of the present invention, in the wire rope fixing device of the first aspect, the fixing means includes a plurality of bolts and a plurality of bolts formed on the second member so as to be screwed with the bolts. And a plurality of holes formed in the first member and having a diameter larger than the diameter of the screw portion of the bolt. .

According to a fifth aspect of the present invention, in the wire rope fixing device of the fourth aspect, an inclined portion is formed on a periphery of the plurality of holes formed in the first member. It is intended to provide a wire rope fixing device to be used.

According to a sixth aspect of the present invention, there is provided the wire rope fixing device according to the fourth aspect, wherein a lower surface of the head of the bolt is inclined.

According to a seventh aspect of the present invention, there is provided the wire rope fixing device according to the fourth aspect, wherein the bolt has a torsion at the lower end of the screw portion.

[0012]

DETAILED DESCRIPTION OF THE INVENTION [1. Configuration] A configuration of a wire rope fixing device (hereinafter referred to as a rope clip) according to an embodiment of the present invention will be described with reference to FIGS. The rope clip according to the present embodiment is a concave member 1 that meshes with each other.
0 and the convex member 20 and two bolts 30 for fastening the two members 10 and 20. 1 (A), (B),
(C) shows the figure which looked at the concave member 10 from the upper side, the figure seen from the side, and the figure seen from the lower part, respectively. As shown in FIG. 1B, the concave member 10 has a concavely curved portion (hereinafter, the inside of the concavely curved portion is referred to as a concave portion 12) for accommodating two wire ropes. Call). Flat portions 16 are provided at both ends of the concave portion 12. Here, the width 13 of the recess 12 is
Corresponding to the diameter of the wire rope housed in the wire. Also,
The depth 14 of the concave portion 12 is a depth that can accommodate two wire ropes.

As shown in FIGS. 1A and 1C, a flat portion 16 has a hole 11 through which a bolt 30 is inserted.
Is provided. The diameter of the hole 11 is larger than the diameter of the thread portion of the bolt 30. Therefore, when the bolt 30 is inserted into the hole 11, a predetermined gap is generated between the hole 11 and the threaded portion of the bolt 30. The upper peripheral portion 15 of the hole 11 is inclined in a curved shape. This is to prevent concentration of stress due to tightening on the head of the bolt 30 at the time of fastening with the bolt 30 described later.

FIGS. 2A, 2B and 2C respectively show:
The figure which looked at the convex member 20 from the upper side, the figure seen from the side, and the figure seen from the lower part is shown. As shown in FIG.
Has a convex portion 21 that fits in the concave portion 12 of the concave member 10. Since the convex portion 21 is accommodated in the concave portion 12, the two members 10 and 20 do not shift in the left-right direction in the drawing. Here, the width 22 of the protrusion 21 is determined so that a predetermined gap is formed between the side surface 25 of the protrusion 21 and the recess 12 when the protrusion 21 is housed in the recess 12. The height 26 of the convex portion 21 is such that when the wire rope is accommodated in the concave portion 12 and the concave portion 12 is covered by the convex member 20 so that the wire rope does not escape, the flat portion 16 of the concave member 10 It is determined so that a predetermined gap is generated between the convex member 20 and the convex member 20.

A curved surface 24 is formed on the top of the convex portion 21 to improve the adhesiveness between the wire rope and the peripheral surface. It does not shift. And
As shown in FIGS. 3A and 3C, holes 23 are provided at both ends of the convex member 10, and these holes 23 are provided with female threads for screwing with the bolts 30.

FIG. 3 shows the bolt 30 as viewed from the side. The lower surface of the head 32 of the bolt 30 is inclined in a curved shape. This is when fastening with the bolt 30 described later,
This is to prevent concentration of stress due to tightening on the head 32. A torch 31 is provided at the lower end of the bolt 30. This torsioner 31
When twisted with a predetermined force or more, the constricted portion 34 is cut off.

[2. Operation] Next, an operation example when the rope clip is used will be described. FIGS. 4 and 5 are cross-sectional views (FIGS. 4 (B) and 5 (A)) before and after fixing the rope clip to the wire rope (FIG. 4 (A)), and cross-sectional views at the end of fixing (FIG. 5). (B)) is shown. First, as shown in FIG. 4 (A), two wire ropes 7 are put into a space 40 created by the projection 21 being housed in the recess 12. At this time, as described above, a predetermined gap 18 is generated between the concave portion 12 and the convex portion 21, and a predetermined gap 17 is generated between the flat portion 16 and the convex member 20.

Next, as shown in FIG. 2B, when the bolt 30 is inserted into the holes 11 and 23 of the members 10 and 20 and tightened in the vertical direction, a wire sandwiched between the members 10 and 20 is formed. As the rope is crushed up and down, the gap 18 becomes smaller. On the other hand, the gap 17 hardly changes its size. Then, when the bolt 30 is further tightened, the wire rope 7 is no longer crushed up and down after a certain state. That is, bolt 3
Even if 0 is tightened, the gap 18 does not become smaller. Reference numeral 15 denotes a vector indicating the force applied to the wire rope 7 from both members 10 and 20 at this time.

When the bolt 30 is further tightened, as shown in FIG. 5A, the concave portion 12 of the concave member 10 is elastically deformed to the inside (that is, the wire rope 7 side).
This causes the flat portion 16 to move downward and the gap 18 to be further reduced. That is, the concave member 1
0 is the wire rope 7 with the vertex 19 of the concave portion 12 as a fulcrum.
Supported by the concave member 1 in this state.
Since a pressing force is applied to the flat portions 16 at both ends of the convex portion 20 toward the convex member 20, the concave portion 12 is elastically deformed inward. In addition, the gap 17 becomes smaller with the elastic deformation of the recess 12. At this time, due to the elastic deformation of the concave portion 12,
The relative positional relationship between the hole 11 and the bolt 30 also changes,
As shown in FIG. 3A, the bolt 30 comes to be located slightly inside the hole 11.

Then, when the bolt 30 is tightened to a predetermined state, the torcher 31 is tightened next. This tightening is performed until the torsher 31 is screwed off. As shown in FIG. 5 (B), the recess 12 is elastically deformed more and more inwardly (ie, the gap 17 becomes smaller) as shown in FIG.
8 becomes even smaller.

Due to the elastic deformation of the recess 12 described above, the left and right inner walls of the recess 12 come into contact with the wire rope 7 and press the wire rope 7 from the left and right. The force applied from the two members 10 and 20 to the wire rope 7 at this time is represented as vectors 50 and 60 as vectors. Therefore, the wire rope 7 is fixed not only from above and below by the force 50 but also from the left and right by the force 60. That is, the wire rope 7 is more firmly fixed by receiving forces from all sides.

[3. Modifications] [3-1. First Modification] In the above embodiment, the convex member 2
0 has a convex portion 21, and the convex portion 21 has a concave portion 1.
2 and, together with the bolt 30, both members 10 and 2
There is a role to prevent 0 from shifting. However, the convex member 20 does not necessarily need to include the convex portion 21. If the concave portion 12 of the concave member 10 is set to an appropriate depth in consideration of the absence of the convex portion 21, the convex portion 21 is not necessary. FIG. 6A is a cross-sectional view before fixing the wire rope 7 with the flat plate member 25 having no protrusion 21 and the concave member 10,
FIG. 2B shows a sectional view after fixing. If the depth of the concave portion 12 is a predetermined depth as shown in FIG. 7A, the bolt 30 is tightened as shown in FIG.
The concave portion 12 is elastically deformed inward, and the wire rope 7 is fixed by receiving forces from all directions.

[3-2. Second Modification] In the above-described embodiment, the lower surface of the head 31 of the bolt 30 and the concave member 1
The upper peripheral portion 15 of the hole 11 formed at 0 is inclined in a curved shape in order to prevent stress concentration at the time of fastening, but it is not always necessary to do so, and only one of them may be inclined. If both bolts 30 have sufficient strength, both need not be inclined. Further, the inclination is not limited to a curved surface, but may be a planar inclination.

[Others] In the above embodiment, the bolt 30
Has a torsioner 31, but this is not necessary, and if the bolt 30 can be tightened with a predetermined strength, the torsioner 31 is unnecessary. Also,
The fastener for fastening the concave member 10 and the convex member 20 is not limited to the bolt 30 and may be another fastener. For example, fastening by bolts and nuts may be used. In that case, the female screw need not be cut in the hole 23. In that case, the bolt 30 may be inserted from the hole 11 of the concave member 10 and screwed with the nut on the convex member 20 side as described above, or the bolt 23 of the convex member 20 may be screwed. And may be screwed into the nut on the concave member 10 side.

[0025]

As described above, according to the present invention,
The wire rope sandwiched between the rope clips is more firmly fixed by receiving forces from all sides.

[Brief description of the drawings]

1 (A) is a view of a concave member 10 viewed from above, FIG. 1 (B) is a view of a concave member 10 viewed from the side,
(C) is a diagram of the concave member 10 viewed from below.

2A is a diagram of the convex member 20 viewed from above, FIG. 2B is a diagram of the convex member 20 viewed from the side,
(C) is a view of the convex member 20 as viewed from below.

FIG. 3 is a side view of the bolt 30;

FIG. 4 is a cross-sectional view showing a state where the wire rope 7 is fixed by the rope clip of the present embodiment.

FIG. 5 is a cross-sectional view showing a state where the wire rope 7 is fixed by the rope clip of the present embodiment.

FIG. 6A is a sectional view before fixing the wire rope 7 by the flat plate member 25 and the concave member 10, and FIG.
Is a sectional view after fixing.

FIG. 7A is a side view of a crane boom top using a conventional rope clip as viewed from the side;
(B) is the figure which looked at the rope clip which fixes a wire rope from the axial direction of the wire rope.

[Explanation of symbols]

10 ... concave member, 11 ... hole, 12 ... concave part,
13: width of the concave portion 12, 14 ... depth of the concave portion 12,
15 ... a vector indicating the force applied to the wire rope 7,
16: flat portion, 17: concave portion 12 of concave member 10
A gap formed between the convex member 20 and the convex portion 21 of the convex member 20;
..Gaps formed between the flat portion 16 of the concave member 10 and the convex member 20, 19: the top of the concave portion 12, 20: the convex member, 21: the convex portion, 22: the convex Width of part 21, 2
3 ... Hole, 25 ... Plate member, 26 ... Protrusion 21
Height, 30 ... bolt, 31 ... torsha,
32 ... head of bolt 30, 40 ... space, 50, 6
0: Vector indicating the force applied to the wire rope 7

 ──────────────────────────────────────────────────続 き Continuing from the front page (71) Applicant 599017254 Hisashi Konno 2-6-4-1 Nakanoshima, Toyohira-ku, Sapporo-shi, Hokkaido (71) Applicant 599017265 Kyoto Sato 3-6-7, 2-Jo Nishi, Sumikawa, Minami-ku, Sapporo, Hokkaido (71) Applicant 599017276 Masaru Kobayashi 12-2-16 Minami 20-Jo Nishi, Chuo-ku, Sapporo-city, Hokkaido (71) Applicant 599017287 Hiroshi Mitamura 3-1-1-18, Hachiken 9-Jo-Higashi, Nishi-ku, Sapporo, Hokkaido (71) Applicant 599017298 Hidetoshi Osaka 2-7-2, Kotoni, Nishi-ku, Sapporo, Hokkaido (71) Applicant 599017302 Yasuhiro Sasaki 6-30, Atsubetsu-minami, 6-chome, Atsetsu-ku, Sapporo, Hokkaido (71) Applicant 597016033 Masuyuki Mirahira, Kitahiroshima, Hokkaido 4-13-1 (72) Inventor Kazuo Hirama 14-6, Kita 1-jo Nishi, Chuo-ku, Sapporo-city, Hokkaido NTT Hokkaido Mobile Communication Network Company (7 2) Inventor Naohiro Arashima 14-6, Kita 1-Jo Nishi, Chuo-ku, Sapporo, NTT NTT Hokkaido Mobile Communication Network Co., Ltd. Address NTT Hokkaido Mobile Communication Network Co., Ltd. (72) Inventor Masashi Sato 3-1-1-18 Hiraoka, Kiyota-ku, Sapporo, Hokkaido, Japan (72) Inventor Kenji Nakai 12 Minami 20, West 12, Minami-ku, Chuo-ku, Sapporo, Hokkaido Chome 2-23 (72) Inventor Hisashi Konno 2-6-4-1 Nakanoshima, Nakanoshima, Toyohira-ku, Sapporo, Hokkaido, Japan Masashi Kobayashi 12-2-16 Minami 20-Jo Nishi, Chuo-ku, Hokkaido Article 7-2-20 (72) Inventor Yasuhiro Sasaki 6-12-30 Atsubetsu Minami, Atsubetsu-ku, Sapporo-city, Hokkaido (72) Inventor Masuyuki Ujihira North 4-13-1, Higashisato Higashisato, Kitahiroshima City, Kaido

Claims (7)

[Claims] A first member having a curved portion through which a wire rope is inserted and flat portions provided at both ends of the curved portion; A wire rope fixing tool comprising: a second member fixed to the flat portion; and fixing means for pressing and fixing the flat portion of the first member and the second member to each other. . 2. The wire rope fixing device according to claim 1, wherein the second member has a protrusion inserted into the curved portion of the first member. . 3. The wire rope fixing device according to claim 2, wherein a top of the projecting portion is curved in a concave shape. 4. The wire rope fixing device according to claim 1, wherein the fixing means includes: a plurality of bolts; a plurality of screw holes formed in the second member to be screwed with the bolts; The first portion having a diameter larger than the diameter of the thread portion of the bolt;
And a plurality of holes formed in the member. 5. The wire rope fixing device according to claim 4, wherein an inclined portion is formed at a periphery of the plurality of holes formed in the first member. 6. The wire rope fixing device according to claim 4, wherein a lower surface of the head of the bolt is inclined. 7. The wire rope fixing device according to claim 4, wherein the bolt includes a torsioner at a lower end of a screw portion.