JPH1030629A - Shackle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability of a rope and a shackle pin to be used by fitting/installing a rope hooking roller having a prescribed outside diameter to/on the outside of the pin installed between both end parts of a substantially inverse U-shaped shackle main body. SOLUTION: A roller 3 is fitted and installed around a pin 2 installed between both end parts 11 and 12 of a substantially inverse U-shaped shackle main body 1. A peripheral groove 33 is formed on an outer periphery of the roller 3. This shackle Y is used by hookingly fastening a shackle upper part 13 by a hook 4 of a crane or the like after a rope 5 to suspend and hold a heavy article W is wound round and hooked on an outer periphery of the roller 3. At this time, the rope 5 is fitted in the peripheral groove 33 of the roller 3, and prevents positional dislocation. Since curvature of a roller winding-hooking part 5b of the rope 5 becomes large in a suspending-holding condition of the heavy article W, a damging degree by bending of the rope 5 is sharply reduced. Since an inside surface of a central hole 31 of the roller 3 contacts almost over the total length with the pin 2, burden weight can be dispersed, and durability of the pin 2 itself is also improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shackle used for hanging a rope for hanging a heavy article with a crane or the like.

[0002]

2. Description of the Related Art FIGS. 5 and 6 show a conventional shackle X.
It is shown. This conventional shackle X is configured by extending a pin 2 between both ends 11 and 12 of a substantially inverted U-shaped shackle body 1.

At both ends 11 and 12 of the shackle body 1, a hole 14 for inserting a pin is formed on one side, and a screw hole 15 having a female screw is formed on the other side. The pin 2 has a male screw 21 formed at the distal end thereof, and an operating portion (rod insertion hole) 22 for rotating the pin formed at the proximal end thereof. And this shackle X is a male screw 21 of pin 2.
The side is inserted into the hole 14 of the shackle body 1, and the male screw 21 is screwed and tightened into the screw hole 15 to be integrated. There are several types of shackle X having different strengths depending on the weight of the shackle.
Therefore, the diameter D cannot be increased so much (the diameter D is as large as about 30 mm).

The shackle is a cable (wire rope) 5 that suspends a heavy article W on the pin 2.
Is used with the upper part 13 of the shackle body 1 hooked by a hook 4 such as a crane.

[0005]

In the conventional shackle X shown in FIGS. 5 and 6, the diameter D of the pin 2 around which the wire rope 5 is wound is relatively small (cannot be made large).
Therefore, the wire rope 5 is hung on the pin 2 and the heavy article W
When the wire rope 5 is suspended,
Has the same small curvature (curvature of radius 1 / 2D) as the outer diameter of the pin 2. Therefore, in the conventional shackle X, when hanging the heavy article W, the curvature of the pin wrapping portion 5a of the wire rope 5 becomes small, and the contact portion between the pin wrapping portion 5a and the pin 2 becomes small. Length. Although the wire rope 5 is used repeatedly, the pin wrapping portion 5a that comes into contact with the pin 2 is almost at the same position (central portion in the length direction) every time the wire rope 5 is used.

As described above, in the conventional shackle X, since the pin 2 is thin, when the heavy article W is hung, the pin winding portion 5a of the wire rope 5 is bent at a small curvature (excessively bent). ) And since the same position is bent many times, the pin winding portion 5a of the wire rope 5 is particularly easily damaged. In addition, when the wire rope 5 is bent at a small curvature in this manner, when the wire rope 5 is removed after the hanging operation is completed, a bending mark remains at the position where the pin wrapped portion 5a is formed (the bent line remains). ), Which makes it difficult to handle the next use. Furthermore, if the pin 2 is thin, the wire rope 5
When the contact length between the pin and the pin 2 is reduced, the load of the heavy article W is concentrated in the small length range of the pin wrapped portion 5a, and the weight per unit length of the pin wrapped portion 5a increases. As a result, there is a problem that the durability of the wire rope 5 is reduced. In addition, the wire rope 5 has 10 ropes.
% Of the cable is severed, the shape of the cable is significantly deformed (protrusion of the cord, extreme bending, etc.), the diameter is reduced more than 7% of the nominal diameter, etc. In some cases, the device may become unusable when suspended.

In the conventional shackle X shown in FIGS. 5 and 6, when the wire rope 5 is wound around the pin 2,
Since the wire rope 5 is in contact with the pin 2 only in a small linear area, the weight burden on the pin 2 side is localized. Therefore, there is a problem that the bending stress on the pin 2 becomes large and the durability against the bending stress is low.

[0008] In view of the above-mentioned problems of the conventional shackle, the present invention can improve the durability of a used rope (wire rope) and the durability of a shackle itself (pin). It is intended to be.

[0009]

The present invention has the following structure as means for solving the above-mentioned problems.

That is, the present invention relates to a shackle in which a pin is provided between both ends of a substantially inverted U-shaped shackle main body, and a cable for rigging having a predetermined outer diameter is fitted to the outside of the pin. It is characterized by wearing.

The pins are detachable from the shackle body. Then, when the pin is installed between both ends of the shackle main body, with the roller interposed between both ends of the shackle main body, the pin is inserted into the hole at both ends of the shackle main body and the center hole of the roller. The shackle body, the pin and the roller are integrated.

The roller is preferably made of metal in terms of strength. As for this roller, it is preferable to make the outer diameter as large as possible from the viewpoint of the wire rope supporting force, but any roller having any outer diameter can be adopted. Further, it is preferable that the length of the roller in the axial direction is longer within the interval between the inner surfaces of both ends of the shackle body. That is, as the length of the roller increases, the overlapping area with the pin inserted into the center of the roller increases. This means that in use, the load applied to the roller portion is dispersed and received over a long range on the pin (local load can be eliminated).

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS. 1 to 4. The shackle Y of this embodiment is used when a heavy object W is suspended by a crane or the like. The basic structure is the same as that of the conventional example shown in FIGS.

That is, as shown in FIGS. 1 to 4, the shackle Y of this embodiment comprises a shackle body 1 bent in a substantially inverted U-shape, and both ends 11, 12 of the shackle body 1.
It has a pin 2 laid between them and a roller 3 fitted around the pin 2.

The shackle Y is formed in several sizes having different strengths depending on the suspended weight. In the illustrated example, the shackle body 1 has a height of 150 to 150 mm.
160mm, width 120-130mm, thickness 25-30mm
Use a pin having a diameter of about 25 to 30 mm as a pin 2 and a roller 3 having a diameter E of 80 to 100 mm.
The length is about 55 to 60 mm. still,
In FIG. 1, the heavy article W suspended using the shackle is displayed extremely small compared to the shackle for convenience (for drawing), but actually, for example, about 1 ton or more. It has weight.

5 and 6, the male screw 21 side of the pin 2 is inserted through the hole 14 of the shackle body 1 and the operating part 22 is turned to rotate the male screw 21. Is screwed into the screw hole 15 to be integrated. In addition, the pin 2 is formed by unscrewing the screw portion.
It can be removed from the shackle body 1.

The roller 3 is made of steel, and has an insertion hole 31 formed at the center thereof for inserting the pin 2. This insertion hole 3
1 has an inner diameter slightly larger than the diameter D of the pin 2. Further, flanges 32 are formed at both ends in the axial direction of the roller 3, and a circumferential groove 33 is formed in the outer periphery of the roller 3 at the center in the axial direction. The depth of the circumferential groove 33 is for preventing the wire rope 5 from being displaced, and may be relatively shallow.

Before the shackle Y is attached to the shackle main body 1, both ends 1 of the shackle main body 1 are attached.
After inserting the male screw 21 of the pin 2 into the hole 14 of the one end 11 of the shackle body and the center hole 31 of the roller 3 with the roller 3 interposed between the rollers 1 and 12, the male screw of the pin 2 21 is screwed into the screw hole 15 in the other end portion 12 of the shackle body.
By tightening, the shackle body 1, the pin 2, and the roller 3 are integrated.

As shown in FIG. 1, the shackle Y has a rope (wire rope) 5 for suspending a heavy article W wound around the outer periphery of the roller 3 portion. The upper part 13 is used by being hooked by a hook 4 such as a crane. At this time, the wire rope 5 is
, And does not shift. Further, in the suspended state of the heavy article W, the roller winding portion 5b of the wire rope 5 is wound around the outer periphery of the roller 3 (circumferential groove 33), so that the curvature of the roller winding portion 5b (as shown in FIG. 2) In addition, the curvature of the radius 1 / 2E) increases. Therefore, the roller winding portion 5b of the wire rope 5 is not excessively bent, the degree of damage due to bending is greatly reduced, and no bending mark remains at the position where the roller winding portion 5b was. Further, when the wire rope 5 is wound around the large-diameter roller 3 as described above, the length of the contact portion between the roller winding portion 5b and the roller 3 becomes longer, so that the unit length in the roller winding portion 5b is increased. The burden weight per contact is reduced, and the durability of the wire rope 5 is increased. Further, since the inner surface of the center hole 31 of the roller 3 is in contact with the pin 2 over the entire length of the roller, the load applied to the roller 3 can be dispersed and received over a long range of the pin 2. (The local load can be eliminated), and the durability of the pin 2 itself can be improved.

[0020]

According to the shackle of the present invention, the following effects can be obtained.

(1) Since the roller 3 for hooking is fitted around the pin 2, the rope (wire rope) 5 can be wound around the roller 3 when the shackle is used. As described above, when the wire rope 5 is wound around the roller 3 having a larger diameter than the pin 2, the curvature of the roller winding portion 5b of the wire rope 5 increases, and the roller winding portion 5b is not excessively bent. In addition, the degree of damage due to bending is greatly reduced, and no bend remains at the position where the roller was wound around 5b.

(2) When the wire rope 5 is wound around the large-diameter roller 3 as described above, the length of the contact portion between the roller winding portion 5b and the roller 3 becomes longer. The burden weight per unit length in the portion 5b is reduced, and the durability of the wire rope 5 is increased.

(3) Further, the roller 3 has its center hole 31
Since the inner surface of the roller contacts the pin 2 over the entire length of the roller, the load applied to the roller 3 can be dispersed and received over a long range of the pin 2 (the local load can be eliminated). The durability of the pin 2 itself is also improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a shackle according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1;

FIG. 4 is an exploded perspective view of the shackle of FIG.

FIG. 5 is a front view of a conventional shackle.

FIG. 6 is a sectional view taken along line IV-IV of FIG. 5;

[Explanation of symbols]

1 is a shackle main body, 2 is a pin, 3 is a roller, 4 is a hook, 5 is a rope (wire rope), 11 and 12 are ends, and W is a heavy article.

Claims (1)

[Claims] 1. A shackle having a pin (2) installed between both ends (11, 12) of a substantially inverted U-shaped shackle body (1), wherein a predetermined shackle is provided outside the pin (2). A shackle fitted with a roller (3) for rope hanging having an outer diameter of (3).