JPH0613330Y2 - Latch mechanism - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a latch mechanism in a rotary door structure or a butt joint structure by parallel movement.

[Conventional technology]

Conventionally, this type of latch mechanism has a structure shown in, for example, FIGS. 4 and 5, and is often used in general automatic exclusive door locks. FIG. 4 is a sectional view immediately before operation, and FIG. 5 is a sectional view in a latched state. In FIG. 4, the hook 17
Is always held in the illustrated state by a spring 20 around a pin 19. The ratchet 18 is always given a clockwise force about a pin 21 by a spring 22. The hook hanging metal fitting 25 approaches the hook 17 from the right side to the left side in the drawing and pushes the slope of the hook 17 to rotate the hook 17 clockwise.

In FIG. 5, the structure 26 on the side of the hook fitting is used as the cushioning material 2.
When 4 is pressed against the hook-side structure 23 until it is appropriately compressed, the hook 17 is further rotated through the hook fitting 25 and the ratchet 18 is operated. At this time, the hook fitting 25 is fitted and latched so as to be held in the groove 17 'of the hook 17. Due to the restoring force, the cushioning material 24 thus compressed and the groove 17 'of the hook 17 and the hook fitting 2
The play with 5 is canceled. Next, when the lever 27 is pulled downward, the hook 17 is rotated counterclockwise by the force of the spring 20 and pushes the hook hook 25 to the right to release the latch.

[Problems to be solved by the invention]

In the conventional latch mechanism described above, the cushioning material 24 is indispensable because play occurs after the latching without the cushioning material 24. Further, since a large force is required to compress the cushioning material 24, it will not be latched unless an impact force is applied.
Further, when the moving side structure (either the hook side structure 23 or the hook hanging metal fitting side structure 26) has a large mass at the time of releasing, the latch cannot be easily released only by the force of the spring 20, so that the operator often operates the lever 27. While operating
It is necessary to pull apart the structures on both sides. On the contrary, when the force of the spring 20 is large and the mass of the moving side structure is small, it is dangerous because the moving side structure is suddenly released when the latch is released. There are drawbacks. For example, when applied to the assembly structure of structures in outer space, these drawbacks are serious problems.

[Means for solving problems]

The latch mechanism of the present invention is arranged independently of the hook, which is always given a rotational force in the latching direction, the ratchet for stopping rotation for keeping the hook in the state before latching, and the release lever. It has a ratchet release cam and can be latched with a relatively small insertion force, and the latch can be released without applying force to the moving side structure while the latching operation is completed.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of the latch mechanism according to the present invention immediately before the operation. The hook 1 is held at the position shown by a ratchet 5 which is given a clockwise rotational force about a pin 3 by a spring 4 and a counterclockwise rotational force about a pin 6 by a spring 7. . Further, the hook 1 has a groove (including the wall surface 2) that is eccentric to the rotation center (3). The cam 8 is rotatable about a pin 9, but a spring 10 keeps the cam 8 in an equilibrium state in the illustrated state. The hook fitting 12 is the support fitting 1
4 is a cylinder that is freely rotatable around a pin 13 that is attached so as to penetrate through 4.

FIG. 2 is a sectional view of the latch mechanism according to the present invention at the initial stage of operation. When the metal fitting 12 is pushed to the hook 1 side on the line connecting the hook hanging metal fitting 12 and the rotation center of the hook 1, the metal fitting 12 pushes one end of the cam 8 and the other end of the cam 8 pushes up the ratchet 5 to rotate the hook 1. When released, the hook 1 starts to rotate in the clockwise direction by the force of the spring 4. At this time, the tip of the wall surface 2 of the eccentric groove of the hook 1 contacts the right shoulder of the hook hanging metal fitting 12.

FIG. 3 is a cross-sectional view of the latch mechanism according to the present invention when it has finished operating. The hook hook 12 is pulled toward the center of rotation of the hook 1 while rolling along the wall surface 2 of the eccentric groove of the hook 1.

There is still room in the depth of the eccentric groove of the hook 1, so that the hook side structure 16 and the hook hanging metal fitting side structure 15 can be connected without play, and, for example, the hook side structure 16 does not loosen even when used in a vibrating environment. Rather, it works to strengthen the bond. Further, since the wall surface 2 of the eccentric groove and the hook hanging metal fitting 12 are in contact with each other at an angle close to a right angle, and the rotation center of the hook 1 and the moving center of the hook hanging metal fitting 12 coincide with each other,
The hook 1 does not reversely rotate against the force for separating the connection, and the connected state can be maintained. Furthermore, since the hook hanging metal fitting 12 is pulled toward the center of the hook 1 beyond the turning radius of the tip of the cam 8, the cam 8 becomes free after operation, and the spring 10 restores the state before operation. Next, when the hook 1 is turned counterclockwise with the lever 11, the hook 12 can release the latch in the same position. After that, the hook side structure 16 and the hook hanging bracket side structure 1
When 5 is opened to the left and right, the hook 12 can push the cam 8 counterclockwise and easily pull it out, and the cam 8 returns to the initial state again.

[Effect of device]

As described above, the latch mechanism according to the present invention can obtain a large coupling force with a small force, and therefore, the impact at the time of latch operation can be minimized. In addition, since the latch can be released without exerting a force on the coupled structure and the coupled structure, coupling and disassembly are extremely easy. Particularly, a remarkable effect in the task of coupling structures to each other by remote control in outer space. Can be expected.

[Brief description of drawings]

1 to 3 are sectional views showing an embodiment of a latch mechanism according to the present invention. FIG. 1 shows a state before operation, FIG. 2 shows an initial state of operation, and FIG. . 4 and 5 are sectional views showing an example of a conventional latch mechanism, FIG. 4 showing a state before operation and FIG. 5 showing a state at the end of operation, respectively. 1 ... Hook, 2 ... Eccentric groove wall surface, 3 ... Pin, 4 ...
Spring, 5 ... Ratchet, 6 ... Pin, 7 ... Spring, 8
...... Cam, 9 ...... pin, 10 ...... spring, 11 ...... lever, 12 ...... hook hook metal fitting, 13 ...... pin, 14 ......
Support metal fittings, 15-hook hook metal structure, 16-hook structure, 17-hook, 17'-groove, 18 ---
Ratchet, 19 ... Pin, 20 ... Spring, 21 ... Pin, 22 ... Spring, 23 ... Hook side structure, 24 ... Cushioning material, 25 ... Hook hook fitting, 26 ... Hook hook fitting side structure , 27 …… Lever.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 57-42065 (JP, U) Rikai 62-85654 (JP, U) Shoko 37-13496 (JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. A hook having a groove surface that is eccentric with respect to a rotating shaft, a hook that has a roller rotatable around a fulcrum shaft, and this roller portion fits into the groove surface of the hook, and the hook. A ratchet that engages with the hook to stop the rotation of the hook, and as the latching operation of the hook and the hook hanging fitting contacts the hook hanging fitting to disengage the ratchet for stopping rotation of the hook from the hook, and the latching operation. When the operation is finished, the latch mechanism is provided with a cam that is disengaged from the hook-engaging metal fitting and restored to the state before the operation.