JPH0543019Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a chain hook, and more particularly to a chain hook that is easy to handle and does not get caught when not in use.

[Prior Art and Problems] Conventionally, chain hooks, especially chain hooks for temporary suspension used at construction sites, etc., are usually chain lengths of 2 to 3 meters and chains cut from a hot rolled steel plate of 3 to 5 mm in thickness, as shown in Fig. 8. , and are used in large numbers at the same time. These chain hooks are good when in use, but when they are not in use, they accumulate haphazardly, so when you try to take out an individual chain hook to reuse it, the hook gets caught on the chain of another chain hook, and you have to untangle it. The problem was that it took an unexpected amount of time.

Especially when lifting curtain walls, concrete plates, scaffolding materials, spandrels, etc. with a crane at a construction site, it is extremely troublesome for workers to separate chain hooks from piles and take them out one by one in narrow or high places. That's a thing.

Therefore, the inventor of the present invention came up with the idea of having a structure in which the hook itself turns backwards when it encounters resistance from the surrounding chains, etc., so that it does not get caught, and as a result of ingenuity, the present invention was achieved.

[Objective of the invention] The object of the invention is to provide a chain hook that can be easily taken out without getting entangled or caught when taking out one chain hook from a pile of chain hooks in which a large number of chain hooks are piled up.

[Structure of the invention] According to the invention, in a chain hook consisting of a metal chain and a J-shaped hook, the first ring of the chain is inserted into a hole drilled near the J-shaped bottom of the J-shaped hook,
When not in use as a chain hook, the hook faces in the opposite direction to the pulling direction of the chain, and when used as a chain hook, the first ring of the chain comes into contact with the head of the hook, forming a J-shape and functioning as a hook. A chain hook characterized in that the chain has an oval first ring having a stud welded near its top;
When used as a chain hook, the stud engages with a catch provided inside the head of the hook,
The J-shaped head is the first in the chain tension direction, and the J-shaped hook has a heavy head and when the first ring is lifted when not in use as a chain hook, the J-shaped hook is A J-shaped hook is provided in which the hook is an inverted J-shape.

The present invention will be explained in detail below using examples.

[Embodiment] FIGS. 1 and 2 are perspective views of the most basic embodiment of the present invention.

Figure 1 shows that the J-shaped hook 1 is inverted due to its weight.
However, when a large number of chain hooks are being deposited, when they are pulled in the direction of the arrow UP, they receive frictional resistance from the surrounding chain hooks, so they also form an inverted J shape in the pulling direction (arrow UP). Becomes a mold. In addition, 1A is the hook tail (tip),
1B is a hook head, and 2 is a support hole in the conventional example, but this is unnecessary in the present invention. Reference numeral 3 denotes a support hole, which is bored almost at the bottom of the J-shape. 4 is the first ring of the chain that fits into the support hole 3.

The diameter of the support hole 3 is sufficiently larger than the outer diameter of the first ring, so that the first ring can freely rotate relative to the J-shaped hook 1.

The long axis of the first ring is made so that it is always larger than the distance between the center of the support hole 3 and the tip of the hook tail 1A, so when rotating the J-shaped hook by holding the first ring, the It is easy to change from the state to the state shown in Figure 2 (rotation in the direction of the arrow RU). Then, when the load rope 10 (which may be a wire rope or a hook) is hooked onto the J-shaped hook 1, the hook head 1B comes into contact with the first ring, and from then on, the hook head 1B contacts the first ring, and from then on, it moves counterclockwise (in the direction of the arrow RU). It doesn't move, so it functions like a traditional hook.

The chain extends from the second ring 5 to the nth ring on the first ring.

However, in the basic embodiment shown in FIGS. 1 and 2, when there is no load rope 10 and vibration is applied, the head 1B of the J-shaped hook 1 is heavier than the tail 1A, so the support hole 3 is The problem was that it automatically rotated clockwise (in the direction of arrow RD), resulting in the state shown in Figure 1.

Therefore, in order to eliminate this inconvenience, a stud (stud 40A) was welded to the upper end of the first ring to form a modified first ring, as shown in Figures 3 and 4.
A semi-circular hole-shaped catch 1C for receiving and retaining the stud 40A is bored inside the letter-shaped hook head 1.

In this case, the stud 40A of the modified first ring fits snugly into the catch 1C (fixed by the hook's own weight), so it is not easy to attach it even before or after removing the load rope 10. The hook will never return to its original state (to the state shown in Figure 1).

5, 6 and 7 are perspective views showing other embodiments.

In Fig. 5, the scooping part of the J-shaped hook has been modified.
It is designed so that the ring 40 does not get in the way. Therefore, the modified first ring 40 is bent into an L-shape, but since it is bent accordingly, it is reinforced with a reinforcing member 40B. In the case of Figures 6 and 7, the L-shaped break 1
It is of course possible to use it as a ring.

[Effects of the invention] By implementing the invention, all of the above objectives are achieved.

That is, when a chain hook is taken out one by one from a pile of chain hooks, a chain hook that does not get tangled or caught can be obtained.

[Brief explanation of the drawing]

1, 2, 3, 5, 6, and 7 are perspective views showing embodiments of the present invention. FIG. 4 is a front view of the modified first ring. 8th
The figure is a perspective view of a conventional chain hook. 1...J-shaped hook, 1A...J-shaped hook tail, 1B...J-shaped hook head, 1C...catch, 3...support hole, 4...first ring, 40...
Revised 1st ring, 40A...Stud, 10...Load rope.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a chain hook consisting of a metal chain and a J-shaped hook, the first ring of the chain is inserted into a hole drilled near the J-shaped bottom of the J-shaped hook, and the chain hook is When not in use as a chain hook, the hook faces in the opposite direction to the pulling direction of the chain, and when used as a chain hook, the first ring of the chain comes into contact with the hook head to form a J-shape and function as a hook. The chain of command. (2) The first oval ring of the chain has a stud (the same applies below the studs) welded near its top, and when used as a chain hook, the stud is placed inside the head of the hook. The chain hook according to claim 1, which is registered as a utility model and which engages with a pulled catch and has the J-shaped head end first in the chain tension direction. (3) The scope of the utility model registration claim is that the J-shaped hook has a heavy head and forms an inverted J-shape when the first ring is lifted when not in use as a chain hook. Items 1 to 2
The chain hook described in any one of the following paragraphs. (4) The chain hook according to any one of claims 1 to 3 of the claims for utility model registration, wherein the chain hook is a chain hook for scaffolding.