JPH0234493Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is mainly concerned with safety belts and safety devices used by workers at heights to prevent falls, and safety hooks used to connect other objects.

(Prior Art) Conventionally, many safety hooks of this type have a hook opening/closing cap attached to the ventral side of the hook body and a safety cap attached to the back side opposite to the hook.

(Problems to be Solved) When a load is applied in one direction facing the hook opening/closing cap and the safety cap of the conventional product, there is a risk that the hook will open involuntarily. That is, during use, for example, when a load is applied to the hook opening/closing cap in the presser direction while an object is in contact with the safety cap on the back of the hook body, the hook may open involuntarily.

(Means for Solving the Problem) As shown in the figure, this embodiment consists of a hook body 1, a hook opening/closing cap 2, and a safety cap 3.
2 and a pivot shaft hole 13 for the hook opening/closing cap 2 and a locking shaft hole 8 for the safety cap 3 are provided at a position near the base, and the hook opening/closing cap 2 has side wall pieces 21 each having an approximately gate-shaped cross section; 21 and the side wall pieces 21, 21
The joint shaft hole 22 of the safety cap 3 and the pivot shaft hole 2 of the hook body 1 are connected to the proximal end of the hook body 1.
3, and the safety cap 3 includes side wall pieces 31, 31 formed in a cross-sectional approximate gate shape;
A coupling shaft 32 with the hook opening/closing cap 2 is provided near the tip of the cap 1, and a shaft sliding elongated hole 33 and a shaft sliding hook hole 7 are provided near the base end of the hook opening/closing cap 2. The safety cap 3 is fitted inside the caps 21 and 21, and the joint hole shafts 22 and 32 of the two are made to correspond to each other and pivoted by the shaft 4. Both side wall pieces 31, 31 of the safety cap 3 are engaged with the inside tip 14 of the safety cap 3.
into the abdomen side of the hook body 1, and align the pivot shaft hole 23 of the hook opening/closing cap 2, the shaft sliding elongated hole 33 of the safety cap 3, and the pivot shaft hole 13 of the hook body 1, and insert the shaft. 5, the lock shaft 6 is pivotally connected to the shaft sliding hook hole 7 of the safety cap 3 and the lock shaft hole 8 of the hook body 1, and the lock shaft 6 is pivotally connected to the shaft sliding hook hole 7 of the safety cap 3 and the lock shaft hole 8 of the hook body 1. It has a structure in which a spring 9 is provided between the part 34 and the spring 9. In addition, the code 3 in the figure
5 is a spring locking piece provided on the safety cap 3.

(Function) When using the present invention, as shown in Figs. 2 and 3, when the safety cap 3 is pressed in the direction of arrow A against the spring 9, the safety cap rotates about the shaft 4 and at the same time The sliding hook hole 7 also moves, and the lock shaft 6, which is provided through it, is located at the central corner of the shaft sliding hook hole 7 and disengages from the locking groove 71 to release the lock. Subsequently, when the hook opening/closing cap 2 is pressed in the direction of arrow B, the hook opening/closing cap 2 rotates about the shaft 5 and opens the hook opening 16. In this case, the safety cap 3 similarly rotates about the shaft 5, but the lock shaft 6 moves from the central corner of the sliding portion hook hole 7 to the slide groove 72 and slides. When the presser foot operation in the direction of arrow B is released, the hook opening/closing cap 2 returns to its original state due to the bias of the spring 9 and the hook opening 1 is released.
6 is closed, and at the same time, the lock shaft 6 moves from the slide groove 72 of the shaft sliding hook hole 7 to its central corner, and at the same time returns to its original position in the opposite direction of the arrow A under the force of the spring 9, and locks. The shaft 6 moves into the locking groove 71 and becomes locked, making it impossible to open the hook opening/closing cap 2.

That is, the hook body 1 and the hook opening/closing cap 2
and a safety cap 3, each shaft 4,
5 and the lock shaft 6, when the lock shaft 6 is fitted into the locking groove 71 of the sliding hook hole 7, these three shafts 4,
5 and 6 form a triangular truss and are rigid bodies, so the hook opening/closing cap 2 locks the hook opening 16 in the closed state.

Therefore, even if you try to open the cap 2 that opens and closes the hook, you cannot open it because the locking device of the safety cap 3 is activated. The hook opening 16 can be opened only by pressing the cap 2 in the direction of arrow B.

(Effects) The present invention is constructed as described above, and the hook 16
Since the hook opening/closing cap 2 that opens and closes and the safety cap 3 that locks it are superimposed on the ventral side of the hook body 1, they can be placed at two different positions in the same direction, and arrow A and arrow B. The hook cannot be opened unless the safety cap 3 and the hook opening/closing cap 2 are pressed in the following order, and there is no risk of the hook opening inadvertently during use, making it safe. In addition, the opening/closing operation can be performed by grasping the hook and pressing the safety cap 3 with the index finger, and then using the middle, middle, and little fingers to open the presser foot and the hook opening 16 with the hook opening/closing cap 2, which can be done with a continuous one-touch operation. It is easy to open and close the hook, and to attach and detach it to objects. FIG. 5 shows another embodiment, which differs from the previous embodiment in that a shaft sliding hook hole 7 is provided in the hook body 1, and a lock shaft hole 8 and a lock shaft 6 are provided in the safety cap 3. Other properties and effects are the same.

[Brief explanation of the drawing]

Figure 1 is an exploded view, Figure 2 is an assembled front view of the project,
FIG. 3 is a front view of the cap when it is rotated, FIG. 4 is a plan view, FIG. 5 is a front view of another embodiment, and FIG. 6 is a front view of the ring portion being rotated. Symbols in the diagram: 1...Hook body, 2...Opening/closing cap, 3...Safety cap, 4, 5...Shaft, 6
... Lock shaft, 7 ... Shaft sliding hook hole, 8 ... Lock shaft hole, 9 ... Spring, 11 ... Hook part, 12 ... Ring part, 13 ... Pivoting shaft hole, 14 ... Tip Inside, 15
... Abdomen, 16 ... Hook mouth, 71 ... Locking groove, 72
...Slide groove.

Claims (1)

[Scope of utility model registration request] A hook body 1 has a hook portion 11 at the tip and a ring portion 12 at the base end, and a hook opening/closing cap 2 having an approximately gate-shaped cross section.
A safety cap 3 having an approximately gate-shaped cross section is arranged inside the hook opening/closing cap 2, and one end thereof is connected to a shaft 4.
The inner wall pieces 31, 31 at the other end or the hook body 1 are provided with an approximately L-shaped shaft sliding hook hole 7, and a lock shaft hole 8 is provided in the corresponding counterpart thereof.
8 is provided with a lock shaft 6 passing through it, and when the lock shaft 6 is located at one end of the shaft sliding hook hole 7, the rotation of the hook opening/closing cap 2 is locked, and the lock shaft 6 is located at the corner of the center part. A safety hook that features a structure that allows it to rotate to open and close the hook when the hook is turned.