JP2540566Y2 - Hook with detachment prevention means - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to an improvement of a hook.
More specifically, the present invention relates to an improvement of a hook with hook hook preventing means.

[0002]

2. Description of the Related Art For the purpose of traction or the like, a hook, which is attached to one end of a rope, a wire, a chain or the like (hereinafter simply referred to as a rope, etc.) and is hooked with another rope or the like in a hook hole, is used. Various means have been proposed to prevent the hook from being unintentionally released.
Among them, as shown in FIGS. 4 and 5, the hook body 2 in which the hook hole 1 having one side opening is formed, and the left and right sides of the one side 3 of the opening are substantially vertically positioned. A pair of insertion holes 4 and 4 ′ are formed so as to be staggered, and the elastic metal wire 5
Is bent substantially in the U-shape from the center, and the distal ends of the left and right legs formed thereby are bent inward at positions corresponding to the openings that are vertically staggered.
And forming the bent portion with the insertion hole 4 of the hook body 1.
There is a hook hook releasing means which is pivotally inserted into 4 'and has the tip 7 of the central U-shaped bent portion of the elastic metal wire 5 abutted inside the other side 8 of the hook hook opening.

[0003]

The above-mentioned means for preventing disengagement is such that the elastic metal wire always falls outward due to a structure in which the elastic metal wire whose pivot axis is staggered vertically and horizontally is pivotally mounted. The elastic metal wire needs to be firmly held at that position so that the elastic metal wire does not fall out of the opening more than necessary in order to have the function of preventing the elastic metal wire from coming off. For this purpose, the center U of the elastic metal wire
The structure is such that the tip of the bent portion is abutted against the inside of the other side 8 of the hook hook opening. For this reason, the length (height) of the elastic metal wire, which is a means for preventing detachment, becomes longer (higher),
The substantial opening interval between the openings of the hooks is reduced. Accordingly, the diameter (thickness) of the hook A to be inserted into the hook hole 1 of the hook is limited, and the hook hole of the hook is made unnecessarily large in order to obtain a desired opening interval. Therefore, the hook hook becomes unnecessarily large, the weight increases, and handling is inconvenient. In order to solve such a problem, the applicant of the present application has proposed that the length of the elastic metal wire (the length of the elastic metal wire ( (Height) is shortened (lower), and a hook / hook disengagement prevention means is formed that has a locking projection that prevents the elastic metal wire from falling too far outward on one side of the main body opening with the insertion hole. (A utility model registration request submitted on March 2, 1991)

[0004] However, the improved disengagement prevention means also includes:
If the locking projection is not made considerably large, the elastic metal wire will climb over the locking projection and fall outward, and will not fulfill the function of preventing disengagement. Hook hooks are often cast, which is disadvantageous in terms of production and unfavorable in use. SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems of the conventional hook and has an object to reduce the size of the hook while ensuring a simple structure with a function of preventing detachment.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a hook for achieving the above-mentioned object, and comprises a hook body having a hook hole formed on one side, on both left and right sides of one side of the opening. A pair of insertion holes are formed by staggering the positions substantially up and down, and the elastic metal wire is bent in a U-shape from substantially the center, and the tips of the left and right legs formed thereby correspond to the openings. A hook portion having a bent portion formed by bending inward at a position different from the hook portion, wherein the bent portion is pivotally inserted into the insertion hole of the hook body. The upper insertion hole of the insertion hole is a through hole, the length of the tip of the elastic metal wire leg to be inserted into the hole is made longer than the length of the through hole by a fixed length, and the other leg is made to protrude from the through hole. The inner part against the protrusion from the inside, The purpose of is achieved.

[0006]

According to the hook hook of the present invention, the upper and lower insertion holes of the pair of insertion holes into which the bent portions of the left and right legs of the elastic metal wire are inserted are formed as through holes, and the elastic metal wire legs inserted into the holes are used. The length of the tip of the part is made longer than the length of the through-hole by a certain length and made to protrude from the through-hole, and the other leg is stopped against the protrusion from the inside,
The protruding portion functions as a reliable stopper, and the elastic metal wire serving as a detachment preventing means does not fall outward from a certain position, and completely fulfills the detachment preventing function.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Reference numeral 11 denotes a hook body in which an elliptical hook hole 12 having one side opened like the conventional hook is formed, and an attachment hole 13 for connecting one end of a rope or the like is formed. A pair of insertion holes 14 and 15 are drilled on the left and right sides of the opening forming the hole, substantially at the upper and lower positions. The upper insertion hole 15 is formed slightly outwardly of the lower insertion hole 14. The insertion hole 14 is drilled at a depth of about half the thickness of the hole of the hook body, and the insertion hole 15 penetrates the hole of the hook body.

Numeral 16 denotes an elastic wire formed by bending an elastic metal wire such as a piano wire, and a U-shaped bent portion 17 is provided at a substantially central portion thereof.
The left and right legs 18, 19 formed by the bent portion 17 are staggered back and forth as shown in FIG. The left and right legs 18 and 19 are bent at substantially right angles inwardly so as to be bent at different lengths to the lower ends thereof, and are formed as bent portions 20 and 21. The hook body 11 is inserted into the insertion holes 14 and 15 respectively. Bent part 1
7 is tilted forward or backward to an angle of about 45 ° or less,
Escape occurs when the elastic metal wire 16 is deformed when it moves back and forth, so that the elastic metal wire 16 moves smoothly and its durability is improved.

The distance between the insertion holes 14 and 15 and the bent portions 20 and
The difference in length up to 21 is the same,
8 and 19 are substantially parallel to the surface of the hook body 11. However, since the legs 18 and 19 are bent so as to be staggered in the front-rear direction as shown in FIG. 3, when the bent portions 20 and 21 are inserted into the insertion holes 14 and 15, the legs 18 and 19 are not connected to each other. The elastic wire 16 is urged in the outward direction of the hook hole 12 by the shape change. The length of the bent portion 21 is slightly longer than the length obtained by adding the diameter of the elastic metal wire to the thickness of the portion where the insertion hole 15 is formed, and the distal end portion 22 thereof is opposite to the through insertion hole 15. Protruding to the side.
The length of the bent portion 20 is set to a length that just fits into the insertion hole 14 successfully.

When the bent portions 20 and 21 are inserted into the insertion holes 14 and 15, the upper insertion hole 15 into which the bent portion 19 is inserted as described above is slightly outside the lower insertion hole 14. Since the elastic metal wire 16 is formed nearer, the leg 18 of the elastic metal wire 16 is located inside the protruding end 22 of the bent portion 21, and the elastic metal wire 16 is constantly urged outward. The entire elastic metal wire 16 is abutted against the protruding end 22 thereof,
You will never fall outside of that position. As shown in FIG. 3, a leg 18 of the elastic metal wire 16 is connected to another leg 19.
It is not necessary to provide the upper insertion hole out of the lower insertion hole out of the pair of insertion holes by bending it outwardly from the point where it comes into contact with the protruding end 22 of the bent portion. The pair of insertion holes can be provided on a line connected to the other side of the opening.

[0011]

As described above, the means for preventing the hook and hook from coming off according to the present invention has a simple structure and can achieve a 100% reliable effect of preventing the hook and hook from coming off. In addition, since the means for preventing detachment can be shortened, a device which is hooked on a hook hole A
The diameter (thickness) of the hook may be large, so that the hook can be reduced in size with the same strength and easy to handle.

[Brief description of the drawings]

FIG. 1 is a side view of a hook of one embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a side view before an elastic metal wire is inserted into an insertion hole.

FIG. 4 is a side view of a conventional hook.

FIG. 5 is a front view of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Hook hook main body 12 Hook hole 14 Insertion hole 15 Through insertion hole 18, 19 Leg part of an elastic metal wire 20, 21 Bent part

Claims (3)

(57) [Scope of request for utility model registration] A pair of insertion holes formed on both left and right sides of one side of the opening of the hook body having a hook hole having an opening on one side, the pair of insertion holes being substantially vertically shifted from each other; Is bent substantially in the U-shape from the center, and the distal ends of the left and right legs formed thereby are bent inward at substantially different vertical positions corresponding to the openings to form a bent portion. In a hook having a disengagement prevention means in which a bent portion is pivotally inserted into the insertion hole of the hook body, an upper insertion hole of the pair of insertion holes is a through hole, and inserted into the hole. A disengagement prevention means wherein the length of the tip of the elastic metal wire leg is made longer than the length of the through hole by a predetermined length, and is projected from the through hole, and the other leg is abutted against the projection from inside. Hooks having a hook. 2. The hook hook according to claim 1, wherein the U-shaped bent portion is bent forward (outward) of the hook hole. 3. The hook hook according to claim 1, wherein the U-shaped bent portion is bent rearward (inward) of the hook hole.