JPH10299308A - Locking device for door having trigger mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To interlock the closure of a door by fitting a trigger latch in a fixed case, movably urging the trigger latch by a spring, fitting a lock piece in a guide cylindrical part of a base plate, movably urging a lock bar by the spring, and fitting a hold pin to restrict the lock bar in the fixed case. SOLUTION: A hold pin 4 is movably urged toward a lock piece 3 by a holding spring 7. When a locking projection 4a is engaged with a cam recessed part 3a, a stopper shaft part 4b to be abutted on a trigger latch 2 is provided on the hold pin 4. A recessed part 2b for escape in which the shaft part 4b is inserted when the latch 2 is pushed back toward a fixed case 1, is provided in an intermediate part of the latch 2. A locking spring is set to be stronger than the holding spring 7, and when the shaft part 4b is inserted in the recessed part 2b, the projection 4a is detached out of the recessed part 3a. The locking to a fixed frame of a door can be automatically achieved only by the closing operation of the door.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door lock device of a drop-in lock type equipped with a trigger mechanism for detecting closure of a door.

[0002]

2. Description of the Related Art In a conventional drop-in lock device, a lock rod is manually moved upward or downward after a door is closed, and a lock piece at a tip end portion of the lock rod is fitted into a receiving portion on a fixed frame side. I have. However, in the conventional device that adopts such an operation procedure, there is a problem in that the operation is complicated. It is necessary to temporarily hold the door in the closed position so that it will not be pushed by the wind.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a door lock device with a trigger mechanism that automatically establishes a lock instantly in conjunction with the closing of a door.

[0004]

A lock device for a door with a trigger mechanism according to the present invention will now be described with reference to the accompanying drawings.
And the inclined cam surface 2a at the tip is fixed case 1
The trigger latch 2 is moved and urged by the trigger spring 8 so as to protrude further, and the lock piece 3 at the distal end of the lock bar 9 is fitted into the guide cylinder 5a of the fixed base plate 5, and the lock bar 9 is pushed by the lock piece 3. The spring is moved and urged by the locking spring 10 so as to protrude from the guide cylinder 5a, and the locking projection 4a at the tip engages with the cam recess 3a on the side surface of the middle part of the lock piece 3 to lock the lock piece 3 with the guide cylinder. The hold pin 4 to be restrained at the unlocking position in 5 a is fitted into the fixed case 1.

The holding pin 4 is moved and urged toward the lock piece 3 by the holding spring 7, and the locking projection 4a is pressed.
Is engaged with the cam recess 3a, the trigger latch 2
A stopper shaft portion 4b abutting on the side surface of the base end portion is provided at the base end portion of the hold pin 4, and when the trigger latch 2 is pushed back toward the fixed case 1, the escape recess 2b into which the stopper shaft portion 4b enters is triggered. Provided on the side surface of the intermediate portion of the latch 2, the locking spring 10 is set stronger than the holding spring 7, and when the stopper shaft 4b enters the escape recess 2b, the locking projection 4a is released from the cam recess 3a.

The fixed case 1 and the base plate 5 are fixed to, for example, the upper and / or lower portions of the door 11, and are arranged so that the inclined cam surface 2 a of the trigger latch 2 protrudes from the upper and lower end surfaces of the door 11. When the door 11 is closed toward the fixed frame 12, the inclined cam surface 2 a hits the frame edge 14 a of the opening 14 of the fixed frame 12 in the final stage of the closing operation. The closing of the door 11 proceeds further and the inclined cam surface portion 2a
Is pressed by the frame edge 14a, the trigger latch 2 is pushed back to the fixed case 1 side against the bias of the trigger spring 8. The escape recess 2b is the stopper shaft 4b.
When the trigger latch 2 is pushed down to the position facing the, the hold pin 4 is moved to the trigger latch 2 side by the urging of the locking spring 10 and the action of the cam recess 3a, and the cam recess 3a and the locking projection 4a are moved. Is disengaged.
The stopper shaft 4b of the hold pin 4 enters the escape recess 2b of the trigger latch 2.

The lock piece 3 thus released from the restraint by the hold pin 4 moves integrally with the lock rod 9 in the protruding direction by the urging of the lock spring 10 and the door 11
Comes to the fully closed position, the tip of the lock piece 3 engages with the receiving hole 13 on the fixed frame 12 side, and the door 11 is automatically locked. To release the lock of the door 11 with respect to the fixed frame 12, the lock piece 3 escapes from the receiving hole 13, and the lock rod 3 reaches the position where the cam recess 3 a of the lock piece 3 faces the locking projection 4 a of the hold pin 4. Pull 9 back. With this operation, the hold pin 4 is moved toward the lock piece 3 by the bias of the hold spring 7, and the lock projection 4a is engaged with the cam recess 3a.

The movement of the hold pin 4 causes the stopper shaft portion 4b to escape from the escape recess 2b of the trigger latch 2, so that the moment the door 11 is opened, the trigger latch 2 projects in the projecting direction by the bias of the trigger spring 8. It moves and comes to the standby position where the inclined cam surface portion 2a protrudes from the fixed case 1. In the standby position, the stopper pin 4b is in contact with the side surface of the intermediate portion of the trigger latch 2, so that the hold pin 4 is prevented from moving toward the trigger latch 2, and the lock piece 3 is placed in the guide cylinder 5b. It is held in the immersive standby position.

[0009]

In the illustrated embodiment, a receiving groove 15 for fitting the trigger latch 2 of the fixed case 1 and a receiving groove 16 for fitting the hold pin 4 are formed so as to intersect in a T-shape. It is closed by a plate 6. The back plate 6 is fixed from the back side of the fixed case 1 by four screws 17. A spring receiving partition wall 18 is provided in the middle of the receiving groove 16 of the hold pin 4, and the stopper shaft portion 4 b having a small diameter is inserted into a shaft hole 19 provided in the partition wall portion 18. A stop ring 21 is fitted and fixed in the outer peripheral groove 20 at the base end of the stopper shaft portion 4b.
The contact length of the hold pin 4 is limited by contacting the partition wall 18.

The base plate 5 is a back plate 6 of the fixed case 1.
And is fixed to the door 11. This fixing is performed by a fixing tool such as a screw passing through the four through holes 22. The guide tube portion 5a is formed in a rectangular tube shape and is welded to the base plate main body. The guide cylinder portion 5a is disposed in contact with the left side surface of the fixed case 1, and has a through hole 23 in the center of the right side wall portion into which the locking projection 4a of the hold pin 4 enters. The lock piece 3 is formed in a rectangular cross section so as not to rotate in the guide tube portion 5a, and has a blind hole 24 for fitting the lock rod 9 at the base end. The lock bar 9 is fixed to the lock piece 3 by a set pin 26 passing through the transverse hole 25. A stop step surface 28 is formed on the side surface of the intermediate portion of the lock piece 3, and the stop plate portion 2 is
7 are protruded. When the stop cross section of the lock piece 3 comes into contact with the stop plate portion 27 of the guide cylinder portion 5a, the protrusion amount of the lock piece 3 is limited.

Each of the holding spring 7, the trigger spring 8, and the locking spring 10 is constituted by a compression coil spring. The lock bar 9 is a guide plate 2 fixed to the back of the door 11.
The lock spring 10 is fitted into the lock rod 9 and is compressed between the spring receiving ring 31 fixed to the lock rod 9 and the guide plate 29. In addition. The locking spring 10 may be provided so as to be housed inside the guide cylinder portion 5a. In addition, the fixed case 1 and the base plate 5 can be integrally formed. The lock device main body is not limited to being installed on the door 11 side, but may be installed on the fixed frame body side depending on the use and application location.

[0012]

In the lock device of the present invention configured as described above, when the door 11 is closed, the frame edge 1 of the fixed frame 12 is closed.
4a, the trigger latch 2 of the trigger mechanism is pushed back into the fixed case 1, and the movement of the hold pin 4 is released, so that the lock piece 3 is immediately protruded and moved by the urging of the lock spring 10 and fixed. Receiving hole 1 on frame 12 side
3 is engaged. As described above, since the lock of the door 11 to the fixed frame 12 is automatically established only by the closing operation of the door 11, the operation is simple. Since the lock is instantly established by closing the door 11, the door 11
Need not be temporarily held in the closed position.

[Brief description of the drawings]

FIG. 1 is a front view of a lock device for a door with a trigger mechanism according to an embodiment of the present invention.

FIG. 2 is a bottom view of the door lock device.

FIG. 3 is a left side view of the door lock device.

FIG. 4 is a left side view when the door lock device is installed on a door.

FIG. 5 is a cross-sectional view taken along line AA of FIG. 2 at the time of unlocking.

FIG. 6 is a sectional view taken along the line AA of FIG. 2 at the time of locking.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Trigger latch 3 Lock piece 3a Cam recess of lock piece 4 Hold pin 4a Lock projection of hold pin 4b Stopper shaft part of hold pin 5 Base plate 5a Guide cylinder part of base plate 6 Back of fixed case Plate 7 Spring for hold 8 Spring for trigger 9 Lock bar 10 Spring for lock 11 Door 12 Fixed frame 13 Reception hole on fixed frame side

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[Procedure amendment]

[Submission date] June 18, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Name of invention

[Correction method] Change

[Correction contents]

[Title of the Invention] Door lock device with trigger mechanism

Claims (1)

[Claims] 1. A trigger latch 2 is fitted into a fixed case 1, and the trigger latch 2 is moved and biased by a trigger spring 8 so that an inclined cam surface portion 2 a at a tip protrudes from the fixed case 1. Guide tube 5
a into the lock piece 3 at the tip of the lock rod 9,
The lock bar 9 is urged to move by the lock spring 10 so that the lock piece 3 projects from the guide cylinder 5a, and the lock projection 4a at the tip engages with the cam recess 3a on the side surface of the middle part of the lock piece 3. Then, a hold pin 4 for restraining the lock piece 3 at an unlocking position in the guide cylinder portion 5a is fitted into the fixed case 1, and the hold pin 4 is moved and biased toward the lock piece 3 by a holding spring 7, so that a lock projection is formed. When the camshaft 4a is engaged with the cam recess 3a, a stopper shaft 4b that comes into contact with the base end side surface of the trigger latch 2 is provided at the base end of the hold pin 4, and the trigger latch 2 is fixed to the fixed case 1.
When it is pushed back, the recessed recess 2b into which the stopper shaft 4b enters is provided on the side surface of the intermediate portion of the trigger latch 2, the locking spring 10 is set stronger than the holding spring 7, and the stopper shaft 4b is released. A locking device for a door with a trigger mechanism in which a locking projection 4a escapes from a cam recess 3a when it enters a recess 2b.