JPS5834209Y2 - drop lock - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a drop lock for locking doors such as door shoji.

The drop lock of the present invention is configured so that when the lock is locked, the lower part of the lock rod exposed at the bottom of the door shoji etc. cannot be operated from the outside to unlock the drop lock.

Many conventional locks have an L hole drilled into the lock housing when locking.
Since the operating pin is placed along only the long hole in the shape, the lower part of the lock can be easily operated from the outside, and the lock can be unlocked by an intruder, which is not desirable from a security perspective. Ta.

Therefore, the present invention was devised in view of the above-mentioned difficulties of the conventional example.The lock rod is inserted into the vertical part of the lock housing, and the actuating plate is inserted in the same horizontal direction. A long hole in the shape of a straight line in the front is bored with a long hole, an oblique part, and a pin fixing recess, and an operation pin protruding from the lock lever is inserted into the vertical long hole and the first hole.
The lock is inserted into a long hole in the shape of a letter, and has a compression spring interposed between the operating pin of the lock lever and the inner lower surface of the lock housing, and its purpose is to:
The purpose is to make the lock lever immobile and to make the lock with excellent security.

In the following, embodiments of the present invention will be explained based on the drawings. Fig. 1 is a front view showing the unlocked state, and Fig. 2 is a front view showing the unlocked state.
3 is a front view showing a locked state, FIG. 4 is a longitudinal sectional view of FIG. 3, and FIG. 5 is a perspective view of the actuating plate.

In the drawings, the lock housing 1 is a U-shaped cross-sectional housing with an open back surface.

The lock rod 2 is a straight rod with a round cross section, and is inserted into the vertical portion of the casing 1 so as to be vertically slidable.

The actuation plate 6 is a flat plate with bent side ends (Fig. 5).
, is inserted through the casing 1 so as to be slidable left and right.

A vertical long hole 4 is bored in the front of the lock case.

The actuating plate 6 includes a long hole section a parallel to the length "JL4," a diagonal section extending the lower end of the long hole section a downward to one side, and a pinning recess C continuous to the top of the diagonal section. A long hole 7 in the shape of a single character is bored in the front.

The vertical long hole 4 is formed to have a height equal to or greater than the height of the J-shaped long hole 7.

An actuating plate 6 is superimposed on the inner surface of the lock case 1, and a lock rod 2 is arranged behind the actuating plate 6, and the lock rod 2 and the actuating plate 6 slide vertically and laterally in the lock case 1. .

The operating pin 3 protruding from the lock lever 2 is inserted through the elongated hole 7 of the actuating plate 6 and the elongated hole 4 of the lock case 1, and its tip protrudes to the outside of the lock case 1.

The compression spring 5 is wound around the lock rod 2 and is interposed between the operating pin 3 and the inner lower surface of the lock housing 1, and the upper winding of the spring 5 is wound around the operating pin 3.
, and constantly urges the lock rod 2 upward.

In the above configuration, the operation pin 3 is inserted into the vertical elongated hole 4 of the lock housing 1.
It moves within the J-shaped elongated hole 7 of the actuating plate 6 and moves straight up and down along the vertical elongated hole 4 of the lock housing 1.

Therefore, when the locking rod 2 is pushed down, the operating pin 3 moves down along the long hole part a of the vertical elongated hole 4 and the J-shaped elongated hole 7, and when it reaches the oblique part of the J-shaped elongated hole 7. , the operating pin 3 moves on the slanted part and slides the operating plate 6 to the left side, and when the operating pin 3 reaches the tip of the slanted part and stops moving downward, the lock lever is activated. When 2 is released, the operating pin 3 is pressed against the compression spring 5.
, moves up, fits into the pinning recess C of the J-shaped elongated hole 7, and stops.
Prevents the unlocked lock from being locked (Figures 3 and 4).

In this case, even if the lower part of the lock rod 2 exposed under the lock housing 1 is operated, the lock rod 2 is protected by the relative positional relationship between the J-shaped slot 7 and the vertical slot 4, and cannot be moved upward. It is motionless and does not rotate.

On the other hand, when the locking lever 2 is pushed down a little and the operating plate 6 is pushed back slightly to the right, the operating pin 3 comes out of the pinning recess C of the J-shaped elongated hole 7, reaches the slanted part, and the compression spring 5 repulses. The lock lever 2 is pushed up by force along the vertical elongated hole 4 and the J-shaped elongated hole 7, and the actuating plate 6 slides to the right, returning the lock to the unlocked state. Figures 1 and 2).

The lock lever 2 is normally stopped in the upward position by a compression spring 5.

When the door shoji etc. is slid to a predetermined locking position and closed, when the upper end of the lock rod 2 or the operating pin 3 is pushed down, the lock rod 2 moves down and its lower end is connected to the lock provided on the sill etc. It is inserted into a hole (not shown) and the lock is locked.

In addition, when opening a door shoji, etc., as mentioned above, by slightly moving the operating pin 3 and the operating plate 6, the lock lever quickly moves upwards due to the repulsive force of the compression spring 5, and the lower end of the lock lever moves upward. The lock is removed from the lock hole of the threshold, and the drop lock is unlocked.

This invention has the above configuration, and when locking,
Even if the lock lever exposed at the bottom of a door shoji etc. is operated from the outside,
The drop lock cannot be unlocked due to the relative positional relationship between the vertical long hole drilled in the lock case and the J-shaped long hole drilled in the actuating plate. can.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a front view, FIGS. 2 and 4 are longitudinal sectional views, and FIG. 5 is a partial perspective view. 1...Lock case, 2...Lock rod, 3...
...Operation pin, 4...Vertical long hole, 5...
... Compression spring, 6 ... Actuation plate, 7 ...
・J-shaped long hole, a...Vertical long hole part, b...
...Slanted portion, C...Pinning recess.

Claims (1)

[Scope of utility model registration request] A front face 1 consisting of a vertical elongated hole in the lock housing, a vertical elongated hole portion, a diagonal portion, and a pinning concave portion in the lock housing; A long hole in the shape of a letter is bored, and an operation pin protruding from the lock lever is inserted into the long hole in the vertical shape and the long hole in the letter 1 shape, and the operation pin of the lock lever and the inner lower surface of the lock case are connected to each other. A drop lock with a compression spring inserted between them.