JPH0235967Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a locking device used for furniture, etc., and particularly to a locking device equipped with a removable locking pawl whose end portion has a serrated side surface shape. .

Of course, the locking pawl in the locking device as described above can be moved backward by operating the unlocking operation shaft, but even if the locking claw is not operated by the unlocking operation shaft, the locking claw can be moved backward when the door is closed. It is constructed so that it can be retracted against a spring so that it can automatically engage. When the door is closed, the inclined surface at the tip of the locking claw presses against the locked piece, and a thrust in the backward movement direction acts on the locking claw, and this thrust causes the locking claw to resist the spring. However, in conventional locking devices of this type, the sloped end of the locking pawl was flat, so the relative posture between the locking device and the locked piece was slightly different. However, if it is tilted, one side edge of the inclined surface of the tip of the locking pawl and the locked piece will come into sliding contact with each other,
For this reason, a diagonal force acts on the locking pawl, and the locking pawl tends not to move backward smoothly.

The present invention aims to solve the above-mentioned problems, and one embodiment thereof will be described below with reference to the attached illustrative drawings.

In FIG. 1, 1 is the locking device of the present invention, 2 is a locked piece, 3 is a right side door body with the locking device 1 attached at a predetermined position on the inside, and 4 is the locked piece 2 on the inside corner. This is the left side door body with the attached. The locked piece 2
is a stopper that positions the right door body 3 flush with the left door body 4 when both door bodies 3 and 4 are closed, and a member that closes the gap between both the door bodies 3 and 4, It is attached over the entire length (total height) of the left side door body 4.

The locking device 1 includes a locking pawl 5 that protrudes from the back side of the locked piece 2 and a through hole 6 that protrudes into the through hole 6 provided in the door body 3 when both the door bodies 3 and 4 are closed as shown. The unlocking operation shaft 7 is provided with an unlocking operation shaft 7.
An unlocking knob 8 protruding from the outside of the door body 3 is attached to the door body 3 . The locking pawl 5 is movable in the direction of the arrow 9, is urged in the protruding direction by a built-in spring, and is pushed against the spring by rotating the unlocking shaft 7 with the knob 8. It is possible to move the person in and out. Further, the tip end 10 of the locking pawl 5 is formed so that the side surface shape becomes a sawtooth shape, and when the right door body 3 is moved to close while the left door body 4 is closed, the tip portion 10
When the inner inclined surface 10a is in sliding contact with the tip 2a of the locked piece 2 and the right side door 3 is closed, the surface 1 of the tip 10 parallel to the extending/retracting direction 9
0C is configured to be in contact with the back surface of the locked piece 2.

The present invention provides a second locking device in the locking device 1 as described above.
As shown in FIG. 4, the inclined surface 10a and the tip 10b of the tip 10 of the locking claw 5 are
It is characterized by having a curved surface that gently protrudes in the width direction (direction of arrow 11). In addition, 1 in the figure
Reference numeral 2 denotes an overhanging portion (a pair of projecting portions are provided) that is in contact with a protruding pin at the tip of a rotary lever (interlocked with the unlocking operation shaft 7) for moving the locking pawl 5 backward.
13 is a pin that locks a pair of tension coil springs that bias the locking pawl 5 in the projecting direction.

According to the locking device 1 described above, when the right side door body 3 is moved to close with the left side door body 4 closed, the tip inclined surface 10a of the locking pawl 5 is aligned with the tip end 2a of the locked piece 2.
When the right side door body 3 is further moved to close, a thrust force in the backward direction acts on the locking pawl 5 due to the pressing force between the inclined surface 10a and the locked piece tip 2a, and this thrust causes the locking pawl 5 to move backward. The claw 5 moves backward against a built-in spring. When the right side door body 3 is closed to the closed movement limit position where it comes into contact with the locked piece 2, the locking pawl 5 is pushed to the back side of the locked piece 2 by the biasing force of the built-in spring as shown in FIG. It protrudes and engages with the locked piece 2 to lock the right side door body 3. When opening the right side door body 3, the unlocking operation shaft 7 is rotated by the knob 8, and the locking pawl 5 is moved backward against the built-in spring.

The function of the locking device itself is no different from that of the conventional locking device as described above, but according to the structure of the present invention, as described above, the slope 10a and the tip 10b of the tip 10 of the locking pawl 5 is a curved surface that gently protrudes in the width direction (direction of arrow 11), so that when the locking pawl 5 is forced to move backward against the built-in spring by pressing against the locked piece tip 2a, The locking claw 5 comes into sliding contact with the locking piece tip 2a at the most protruding portion of the tip inclined surface 10a and the tip 10b, that is, at the center position in the width direction 11. This state can be maintained even if the relative posture between the locking device 1 and the locked piece 2 is slightly tilted due to slight deformation of the door bodies 3 and 4 or due to installation errors of the locking device 1 and the locked piece 2. There is no major change, and there is almost no possibility that one side edge of the locking pawl 5 will become a sliding contact point as in the conventional case. Therefore, there is almost no possibility that force will be applied in a direction that would tilt the locking pawl when pressed against the locked piece, and the locking pawl will always be used to move backward smoothly, ensuring the desired locking action. I can make it happen.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional plan view showing the locking device of the present invention in use, Fig. 2 is a plan view of the locking pawl, Fig. 3 is a front view of the same, and Fig. 4 is taken along line A-A in Fig. 2. FIG. 1... Locking device, 2... Locked piece, 3, 4...
Door body, 5... Locking claw, 7... Unlocking operation shaft, 8...
...Knob, 10...Locking claw tip, 10a...Slope, 10b...Tip.

Claims (1)

[Scope of utility model registration request] It supports a locking pawl whose tip end has a serrated side surface and is movable in and out of the locking pawl.
The locking device is provided with a spring that biases the locking pawl in the protruding direction, characterized in that the inclined surface at the tip of the locking pawl is a curved surface that gently protrudes in the width direction. locking device.