JPH0249331Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a locking device for a sliding door, such as a telescopic gate, which is opened and closed by pulling it laterally.

Conventional technology As a conventional technology, for example, Utility Model Application No. 57-190866
As shown in Figure 2, a holder b is attached to the center of a square shaft with handles a fixed on both sides.
A sickle c is attached to the door so that it can rotate a certain amount, and the door is automatically locked when the door is closed against the sickle holder d attached to the door frame, and unlocked when the handle is pulled. was known.

Problems to be Solved by the Invention As mentioned above, conventional locking devices have separate latches and springs, have a large number of parts, have a complex structure, and are prone to failures.

Means for Solving the Problems Therefore, the present invention was devised to solve the problems of the conventional methods. An elastic latch consisting of a mounting part and an elastic latch body is attached to the vertical frame of the door, and the latch is attached to the tip. A long hole is provided in the middle part of the plate-shaped elastic latch body with a hook part that engages with the catch, and a spiral part twisted in opposite directions left and right is provided in the plate-shaped handle attachment shaft in this long hole. When the handle is rotated to open the door, the helical part is rotated, and the elastic latch body is moved by the lead of the helix to unlock the lock. Since the latch is made of an elastic body, the number of parts is small and the structure is simple.

Embodiment To explain an embodiment of the present invention shown in the drawings, FIG. 1 shows a cross section of the locking device of the present invention attached to the butt vertical beam 2 of a telescopic gate.
1 is a vertical frame and has the same width as the vertical frame 2, and the side facing the vertical frame 2 has stoppers 11, 11 on the outside.
On the inside, two latch holders 10, 10 are provided symmetrically on each side. Reference numeral 2 denotes abutting vertical beams of the telescopic gate, on which handles 3 are attached on the left and right through handle seats 4 at a height that is easy to operate. One end of the handle seat 4 extends to the front of the vertical bar 2,
It is configured to come into contact with a stopper 11 provided on the vertical frame 1. The handles 3 on both sides are fixed to both ends of a handle attachment shaft 5 formed of a flat plate, and can be operated from inside and outside. As shown in FIG. 1, the handle mounting shaft 5 has helical parts 5a and 5b that are twisted in opposite directions to the left and right across a flat part in the center, and the handle 3 is attached to the end of the helical parts 5a and 5b. is fixed.

On the other hand, an elastic latch 6 made of elastic synthetic resin is attached to the vertical beam 2 near the attachment position of the handle. This synthetic resin elastic latch 6
The mounting portion 7 is formed to fit into the hollow interior of the vertical bar 2, and is adapted to be fitted into the hollow interior from above the vertical bar 2 and attached at a predetermined position with screws or the like. In addition to the mounting portion 7, the elastic latch 6 has an elastic latch body 8, and the rear end of the elastic latch body 8 is connected to the mounting portion within a narrow range so as to be easily elastically deformed. , an elongated hole through which the handle attachment shaft 5 is inserted is provided in the intermediate portion thereof. This elongated hole has the same cross-sectional shape as the spiral portions 5a, 5b of the handle attachment shaft 5, and is formed to be slightly larger to the extent that the helical portion can slide within the elongated hole. The tip portion protrudes from an opening 13 formed in the connecting plate 12 of the left and right abutting vertical bars 2, 2, and a hook portion 9 having a guide surface on the head is formed therein. The hook portion 9 is adapted to engage with a latch receiver 10 provided inside the vertical frame 1 to lock it.

Now, when the handle 3 is rotated to open the telescopic gate, the spiral portion 5a of the handle mounting shaft,
5b also rotates and the elastic latch main body 8 is inserted.
are moved outward due to the spiral leads provided in opposite directions, and the hook portion 9 provided at the tip thereof is disengaged from the latch receiver 10 and unlocked, opening the telescopic gate. When the handle 3 is returned to its original state, the hook portions 9 at the tips are moved inward and returned to their original positions. When closing the telescopic gate from the open state, first, the guide surface of the hook portion 9 at the tip of the elastic latch body 8 touches the latch receiver 10.
When the handle seat 4 collides with the stopper 11 of the vertical frame 1 and is completely tightened, the hook portion 9 is elastically deformed outward as it is guided by the inclined guide surface. As a result, it returns to its original state and engages with the latch receiver 10 to be automatically locked.

Although the locking device of the present invention has been described for use with a telescopic gate, it can be used with any pull-type door that opens and closes by pulling the door laterally.

Effects of the invention In the present invention, the latch is made of an elastic member, and the latch can be released by rotating the handle, so there is no need to provide separate locks and springs as in the past. The number of parts is small, the structure is simple, and there are fewer failures. It is also easy to operate, and when you pull the handle to open the door, the lock is released and the door opens, and when you close the door, it locks automatically, making it very convenient.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the locking device of the present invention attached to the vertical beam of a retractable gate, and FIG. 2 is an exploded perspective view of the handle of the conventional locking device. 2... Vertical beam, 3... Handle, 5... Handle mounting shaft, 6... Elastic latch, 8... Elastic latch body, 9... Hook portion, 10... Latch receiver.

Claims (1)

[Scope of utility model registration request] A plate-shaped handle mounting shaft 5 having spiral portions 5a and 5b twisted in opposite directions left and right from the center is installed on the vertical beam 2 of the door, and a handle 3 is fixed to both ends of the shaft. An elastic latch 6 is attached to the vertical beam 2, and the elastic latch 6 has a mounting portion 7 and a hook portion 9 that engages with a latch receiver 10 at the tip.
A long hole is provided in the middle of the elastic latch body 8, and each of the left and right helical portions 5a, 5b of the plate-like handle mounting shaft 5 is inserted into this long hole. the spiral portion 5a,
5b is rotated, the elastic latch body 8 is moved by a spiral lead to unlock the door.