JPS5838847Y2 - Crescent lock with locking device - Google Patents

Description

[Detailed description of the invention] There are many types of crescent locks that are equipped with a locking device for security purposes.

The present invention is to provide a crescent lock with a locking device having an appropriate structure in which a mechanism for snapping the crescent is associated with a lock shaft, thereby making locking and unlocking operations extremely simple and reliable. The purpose is to

The following is a detailed description of the drawings showing the embodiments of the present invention. In FIGS. 1 and 3, a case 1 fixed to a stile of a sliding door (not shown) has a shaft hole 2 penetrating its top wall 1a. A crescent 3 with a locking piece 5 is rotatably attached to the shaft 4 through the shaft 4, and the inner end of the shaft 4 is rotatably caulked to a cover 6 with a washer 7 interposed therebetween to prevent uneven rotation. It's Nishide.

Further, on the back surface of the top wall 1a of the case 1, a rotary plate 9 is provided, one end of which is rotatably pivoted to a pivot shaft 8 that projects integrally from the case, and one end of which is hooked to a pin 10 of the case 1. The other end of the rotary plate 9 is elastically biased toward one side, that is, in the direction of the shaft 4, by a tension spring 11 hooked onto the rotary plate 9, and its rotating end 9a is elastically biased toward the axis 4. It is brought into elastic contact with one of the omitted circular portions 12.degree. 12 provided at symmetrical positions with respect to the axis 4, and gives the crescent 3 a snap action.

A lock shaft 14 is inserted into a shaft hole 13 extending through one side wall 1b of the case 1, with its inner end facing the rotating end 9a- side of the rotary plate 9, as shown in FIGS. 2 and 6. It is arranged in a rotatable manner.

That is, the inner end of the lock shaft 14 is formed into an enlarged part 14a, so that when the shaft 4 of the crescent 3 is rotated, the rotating end 9a of the rotary plate 9 which is in elastic contact with the notched part 12 of the crescent 3 rotates. It is designed to prevent the rotary plate 9 from coming into contact with the circumferential surface of the shaft 4, and a recess 14b of the rotary plate 9 is provided on one side so as to be able to receive the rotating end 9a of the rotary plate.

A protrusion 14C is integrally provided at a position symmetrical to the relief recess 14b of the enlarged portion 14a, and a stopper 15.15' is provided on the case 1 to protrude the protrusion as shown in FIG. It is protruded so that it can be accessed.

That is, the protrusion 14C and the stopper 15.15' are
In the state shown in FIG. 5 in which the protrusion 14C is butted against one of the protrusions 15, the rotation end 9a of the rotary plate 9 is receivable in the relief recess 14b, and the protrusion 14C is disposed on the other 15'.
4C, the rotating end 9a is set in advance so as to abut against the enlarged portion 14a.

In the illustrated example, the lock shaft 14 is set to rotate forward and reverse within a range of 90 degrees, and a lock knob 16 is integrally fixed to the outer end of the lock shaft 14. A compression spring 18 is interposed between the annular recess 17 of 16 and the side wall 1b of the case 1 to elastically bias the lock shaft 14 outward, so that the lock shaft 14 rotates smoothly without rattling. configured to be operated.

In FIG. 1, reference numeral 19 indicates a crescent stop.

In the above configuration, the crescent 3 is provided with a snap action during locking and unlocking operations by the rotary plate 9 which is brought into elastic contact with one of the omitted circular portions 12 and 12 of the shaft 4. This is done by the rotating end 9a of the rotary plate 9 getting on and off the surface of the omitted circular portion 12.12 and the shaft 4, so the lock knob 16 is placed in a position where the enlarged portion 14a abuts against the rotating end 9a. If the rotating operation is performed, the rotating end 9a will come into contact with the enlarged portion 14a and the rotating plate 90 will be prevented from rotating, so the rotating end 9a will be located on the missing circular portion 12 of the shaft 4 and will ride on the circumferential surface. Therefore, if the crescent 3 is placed in the locked position and the lock knob 16 is rotated as described above, the crescent 3 will not be rotated.
When the lock is locked and the lock knob 16 is rotated to make the escape recess 14b face the rotating end 9a of the rotary plate 9, the pivot end 9a escapes into the escape recess 14b, so that the shaft of the crescent 3 4 can be rotated, and the crescent 3 can therefore be unlocked and the crescent 3 can be locked or unlocked.

As shown in FIG. 4, there are lock and unlock position indicators 20 and 21 on the lock knob 16 and on the side wall of the case 1.
It is convenient to do this.

As explained above, according to the crescent lock with a locking device according to the present invention, the lock shaft 14 rotatably provided on the side wall of the case 1 allows the crescent 3 to have a snap action. The rotating end 9a of the rotary plate 9 brought into elastic contact with the rotary plate 9 is brought into contact with or released from the contact to prevent or allow movement, thereby locking or unlocking the lock shaft 14. It goes without saying that locking and unlocking can be easily performed when locking or unlocking by simply operating the crescent shaft.
Since the movement of the rotary plate 9, which is brought into elastic contact with the rotating plate 12, is prevented or released by the lock shaft 14, there is no possibility of malfunction unlike the conventional structure in which the members are engaged with each other. It is practical because the unlocking operation can be performed reliably and smoothly, and since the structure is extremely simple, there are few failure-causing factors, which increases the reliability and durability of the lock, and can be manufactured at low cost. effective.

[Brief explanation of the drawing]

Fig. 1 is a front view of a crescent lock with a locking device according to the present invention, Fig. 2 is a rear view of the crescent lock, Fig. 3 is a vertical side view of the crescent lock, and Fig. 4 is a part of the crescent lock. 5 is a sectional view taken along the line ■-v in FIG. 2, and FIG. 6 is an enlarged sectional view of the lock shaft portion of the crescent lock. 1...Case, 3...Crescent, 4
...Crescent shaft, 5...Lock piece, 9
... Rotating plate, 9a... Rotating end of rotating plate, 11... Tension spring, 12... Missing circular portion, 14... -Lock shaft, 14a... Enlarged part, 14b... Escape recess.

Claims (1)

[Scope of utility model registration request] The shaft 4 of the crescent 3 with the lock piece 5 pivoted to the case 1
A rotating end 9a of a rotary plate 9, whose one end is pivotally attached to the case and is elastically biased toward one side by a tension spring 11, comes into elastic contact with the missing circular portion 12 of the crescent, thereby imparting a snap action to the crescent. At the same time, an enlarged part 14 is provided with an escape recess 14b facing the rotating end of the rotary plate so that the rotary plate can be brought into contact with and released from the contact.
A crescent lock with a lock device, characterized in that a lock shaft 14 provided in a is rotatably attached to the case.