JP3020895B2 - 2-point lock type locking device for door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-point lock type locking device in which a latch automatically engages with a lock on a fixed frame side in conjunction with a locking rod provided on a door side. .

[0002]

2. Description of the Related Art For example, a conventional drop-in lock device comprises a lock rod mounted on a door side so as to be movable up and down and a receiving portion provided on a fixed frame side. To lock the door in the closed position.

[0003] However, since the door is locked to the fixed frame by a one-point lock system which is established only at one place per one locking device, a door which is subjected to a large load due to a strong wind or the like is mechanically locked. There is a danger that the mechanical strength will be insufficient and the parts will be distorted or damaged and the locking function will be lost. Further, the lock can be violently released by cutting a relatively small diameter locking rod from the gap between the fixed frame and the door, and the security is not good.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to simultaneously lock a door to a fixed frame at two places by a single operation by means of a latch interlocked with a locking rod. It is an object of the present invention to provide a two-point lock type locking device for a door in which the mechanical strength and security of a stop portion are improved.

[0005]

A two-point lock type locking device for a door according to the present invention will be described with reference to the accompanying drawings. S2
And a locking rod 8 which is engaged with and disengaged from the receiving portion 11 on the fixed frame 10 side.
And an interlocking block 4 which is guided by the base 2 and moves linearly, and a shaft which is housed in the case 1 so that a tip portion protrudes and retracts from a side opening 1a of the case 1 and passes through a cam slot 3a at an intermediate portion. A latch 3 rotatably supported on the case 1 by a pin 7, a drive pin 6 for connecting a base end of the latch 3 to a distal end of the drive block 4, and a tip of the latch 3 provided on the fixed frame 10. Interlocked with 5
Vertical rail of base 2 on back of tip of block 4
A guide groove 4a is provided for receiving the drive pin 6a.
Through hole 4c at the bottom of the lower end of the groove 4a and the base end 3a of the latch 3.
Through the through-hole 3c of the case 1 so that the front end is on the inner wall of the case 1.
It is fitted in the downward groove 1c .

When the locking rod 8 is pushed up to a locking position where the distal end engages with the receiving portion 11 on the side of the fixed frame 10, the interlocking block 4 is guided upward by the base 2 and is moved upward by the driving pin 6. The base end of the latch 3 is pulled up. for that reason,
The latch 3 is driven to rotate in the protruding direction by the cooperative action of the cam slot 3a and the shaft pin 7, and the side opening 1a of the case 1 is formed.
The tip of the latch 3 projecting from the engaging portion 5 engages with the catch 5 of the fixed frame 10. Thus, the lock by the engagement between the locking rod 8 and the receiving portion 11 and the lock by the engagement between the latch 3 and the receiving member 5 are simultaneously established.

When the locking rod 8 is pulled down to the unlocked position where it has escaped from the receiving portion 11, the interlocking block 4 is guided by the base 2 and moves downward, and the drive pin 6 pushes down the base end of the latch 3. Therefore, the latch 3 rotates in the immersion direction about the shaft pin 7, and the tip of the latch 3 is
And is drawn into the case 1. Thus, the lock by the engagement of the locking rod 8 and the receiving portion 11 and the lock by the engagement of the latch 3 and the receiving member 5 are simultaneously released.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, a screw 13 is used.
As a result, the guide block 12 is fixed to the door 9, and the locking rod 8 inserted into the guide block 12 moves in the vertical direction. The vertical movement of the lock block 8 is performed by directly pushing and pulling the finger hook portion of the lock rod 8 as in a normal drop-in lock device. The locking rod 8 can be connected to the rotating shaft of the equipped door handle device via an interlocking plate, an interlocking link, or the like, and the operation can be performed by rotating the handle, and the operation method is not particularly limited.

The case 1 and the base 2 are manufactured separately, and the plate-like base 2 is fitted into the back recess 1b of the case 1, and is fixed to the case 1 by screws 14 from the back.
The case 1 and the base 2 are fixed to the door 9 by screws 15 from the front side.
It is stuck to. A rail 2a is provided on the front side of the base 2 so as to protrude vertically. A locking rod 8 is passed through the through hole 4b at the base end of the interlocking block 4, and the interlocking block 4
Is fixed to the locking rod 8 by a screw 16. On the back of the tip of the interlocking block 4, the rail 2a of the base 2 is provided.
A guide groove 4a is provided in which the interlocking block 4 is fitted, whereby the interlocking block 4 is guided to move linearly.

The drive pin 6 is fitted into a through hole 4c at the bottom of the lower end of the guide groove 4a, passes through the through hole 3c at the base end 3a of the latch 3, and has a distal end at a vertical groove 1c in the inner wall of the case 1. It is fitted in. The shaft pin 7 is fitted in a through hole 1 d in the rear wall of the case 1, passed through the cam slot 3 a of the latch 3, and then fitted in a receiving hole 1 e in the front wall of the case 1. The cam slot 3a is inclined with respect to the locking rod 8, and the through hole 3c is provided on an extension of the cam slot 3a. The receiver 5 is fixed to the fixed frame body 10 by a screw 17.

[0011]

As described above, in the two-point lock type locking device for a door according to the present invention, the interlocking block 4 that moves linearly while being guided by the base 2 is fixed to the locking rod 8, and the side opening of the case 1 is opened. The latch 3 whose distal end protrudes and disappears from the case 1 is rotatably supported on the case 1 by a shaft pin 7 inserted into the cam slot 3a of the intermediate portion, and the base end of the latch 3 and the distal end of the drive block 4 are Since the latch 3 is driven to rotate in conjunction with the locking rod 8, the two-point lock is simultaneously established by a single operation, and the operation is excellent in simplicity.

As described above, the locking of the door 9 to the fixed frame 10 is performed at two places by the engagement of the locking rod 8 and the receiving portion 11 and the engagement of the latch 3 and the receiving metal 5, so that strong winds are generated. When it is applied to a place where a large load is applied due to spraying or the like, the load is dispersed and supported at two places, so that the locking rod 8 and the latch 3 are prevented from being deformed or damaged, and the lock is prevented. The mechanical strength of the entire stop device is improved.

Further, it takes a considerably long time to cut the locking rod 8 and the latch 3 by inserting a tool through the gap between the door 9 and the fixed frame 10, and the possibility of finding a crime increases during that time. Therefore, psychological restraint on the thief works strongly,
Improved crime prevention against violent destruction.

[Brief description of the drawings]

FIG. 1 is a front view of a locked state of a two-point lock type locking device for a door according to an embodiment of the present invention.

FIG. 2 is a bottom view of the locking device.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 is a sectional view corresponding to FIG. 4 in an unlocked state of the locking device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Base 2a Rail 3 Latch 3a Cam slot 4 Interlocking block 5 Reception 6 Drive pin 7 Shaft pin 8 Lock rod 9 Door 10 Fixed frame

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E05B 63/14 E05B 65/06 E05C 5/04 E05C 9/04 E05C 9/14

Claims (1)

(57) [Claims] 1. A case 1 and a base 2 fixed to a door 9
And a locking rod 8 which is engaged with and disengaged from the receiving portion 11 on the fixed frame 10 side.
And an interlocking block 4 that is linearly guided and guided by the base 2 and a shaft that is housed in the case 1 so that the tip thereof protrudes and retracts from the side opening 1a of the case 1 and passes through the cam slot 3a in the middle. A latch 3 rotatably supported on the case 1 by a pin 7, a drive pin 6 connecting a base end of the latch 3 and a distal end of the drive block 4, and a tip of the latch 3 provided on the fixed frame 10. Interlocked with 5
Vertical rail of base 2 on back of tip of block 4
A guide groove 4a is provided for receiving the drive pin 6a.
Through hole 4c at the bottom of the lower end of the groove 4a and the base end 3a of the latch 3.
Through the through-hole 3c of the case 1 so that the front end is on the inner wall of the case 1.
The door 2 is fitted in the downward groove 1c, and the latch 3 is driven to rotate in the projecting direction when the locking rod 8 moves to the locking position.
Point lock type locking device.