JP3544194B2 - Push lock device for sliding door - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push-lock device used for a product display case, a small cabinet, or the like, which restrains two doors that are opened and closed by pulling so as to be immovable from each other in a closed position.
[0002]
[Prior art]
As shown in FIG. 5, in the conventional push lock device, a fixed case 33 is fixed to the lower front surface of the front door 31 and a lock cylinder 34 housed in the fixed case 33 so as to be movable in the front-rear direction and rotatable. Is protruded from the front side of the fixed case 33 by a predetermined length in the unlocked state, and the lock shaft 35 at the rear end of the lock cylinder 34 is disposed so as to face a lock hole 36 formed in the rear door 32. ing.
To interconnect the two front and rear doors 31 and 32 pulled to the closed position, the lock cylinder 34 is pushed into the fixed case 33 so that the lock shaft 35 is engaged with the lock hole 36. At the time of this pushing, the lock cylinder 34 is automatically locked to the fixed case 33.
In order to release the mutual connection between the front and rear doors 31 and 32 and open the door 31 or the door 32, the lock of the lock cylinder 34 with respect to the fixed case 33 by the key 37 inserted into the lock cylinder 34 is released. The front end of the lock cylinder 34 is projected from the fixed case 33 by the bias of the built-in spring, and the lock shaft 35 is released from the lock hole 36.
[0003]
The conventional device is a one-touch type in which the lock of the two doors 31 and 32 is automatically established only by pressing the lock cylinder, and thus has the convenience of simple operation. However, since the push lock device is installed only at the lower portion of the door 31, the doors 31 and 32 can be mutually moved and restrained in the direction of arrow A in FIG. It is powerless to prevent the doors 31 and 32 from being displaced in the direction of arrow B in FIG.
For this reason, in a display case or the like in which the doors 31 and 32 are made of a somewhat flexible material such as an acrylic plate, a hand is inserted into the gap between the overlapped portions in the middle of the front and rear doors 31 and 32 in the height direction. The front door 31 is pulled to the front side while the rear door 32 is pressed and bent to the rear side to widen the gap, from which the arm is forcibly pushed to make the goods on the display shelf grasp. A thief has appeared.
[0004]
[Problems to be solved by the invention]
Accordingly, an object of the present invention is to provide a push-lock device for a sliding door with improved security because the front and rear two doors can be mutually restrained in both the left-right lateral direction and the front-rear direction.
[0005]
[Means for Solving the Problems]
The push lock device according to the present invention will be described below with reference to the reference numerals in the accompanying drawings. In the push lock device of the present invention, the fixed case 3 is fixed to the front surface of the middle part of the front door 1 in the height direction, and the lock cylinder 4 is fixed to the fixed case 3. A drive cam protrusion 24 is formed at an eccentric position on the rear end face of the rotor 23 of the lock cylinder 4 so as to be movable and rotatable in the front-rear direction. The biasing spring 2 of the dead bolt 21 is accommodated, a passive groove 25 into which the driving cam projection 24 is inserted is formed at the inner end of the dead bolt 21, and the dead bolt 21 is disengaged from the rear inner wall surface of the fixed case 3. The locking recess 27 is formed, and the small-diameter rear end of the lock cylinder 4 is slidably fitted into the center hole of the fixed case 3, and the lock plate 5 is connected to the rear end of the lock cylinder 4. ,
In the unlocked state where the dead bolt 21 is immersed in the guide hole 20, the lock cylinder 4 is moved by the spring 8 inserted between the rear end wall 16 of the fixed case 3 and the annular shoulder 19 of the lock cylinder 4. the front end portion is protruded to the front side of the fixed casing 3 by bias of the spring 8,
The push lock cylinder 4 to the stationary casing 3 against the protruding biasing spring 8, when pressed between the annular shoulder 19 of the rear wall portion 16 and the lock cylinder 4 of the fixed case 3 the spring 8, wherein The lock plate 5 passes through the lock hole 6 of the rear door 2 and turns the lock cylinder 4 with the key 7 inserted into the key hole 26 of the rotor 23, so that the long side end portions 5 a and 5 b of the lock plate 5 are removed. Engage with the hole edge back surfaces 6a, 6b on the short side of the lock hole 6,
After the dead bolt 21 is engaged with the locking recess 27 of the fixed case 3 to lock the lock cylinder 4 with respect to the fixed case 3, the key 7 is removed from the lock cylinder 4.
[0006]
Effect of the Invention
When the front and rear two doors 1 and 2 are moved to the closed position by pulling the doors 1 and 2 horizontally, the lock plate 5 of the push lock device attached to the front door 1 is vertically and horizontally inserted into the lock hole 6 of the rear door 2. It comes to the position where it faces in line. When the lock cylinder 4 is pushed in the axial direction of the fixed case 3 against the urging force of the spring 8, the lock plate 5 passes through the lock hole 6 and protrudes to the rear side of the rear door 2.
When a predetermined key 7 is inserted into the lock cylinder 4 and the lock cylinder 4 is turned 90 degrees, the long side end portions 5a and 5b of the lock plate 5 are attached to the hole edge back surfaces 6a and 6b on the short side of the lock hole 6. Come to the position where they cross and engage.
After locking the lock cylinder 4 with respect to the fixed case 3, the key 7 is removed from the lock cylinder 4. The front and rear two doors 1 and 2 are sandwiched between the fixed case 3 of the push lock device and the lock plate 5 and are locked in a closed state.
[0007]
To open the doors 1 and 2, the key 7 is inserted into the lock cylinder 4 to release the lock cylinder 4 from the fixed case 3, and the lock cylinder 4 is turned by the key 7 in the opposite direction. As a result, the lock plate 5 is returned to the position aligned with the lock hole 6, so that the lock cylinder 4 moves forward by the bias of the spring 8, and the front end protrudes from the fixed case 3. When the lock cylinder 4 returns to the unlock position in this way, the lock plate 5 passes through the lock hole 6 in the front direction.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
In the illustrated embodiment, the lock unit 9 including the lock cylinder 4 and the rotor 23 is a pin tumbler-type lock unit, and the rotor 23 is fixed to the lock cylinder 4 by the radial stop pin 11 inserted into the annular groove 10 of the rotor 23. Has been stopped. The rear end 12 of the lock cylinder 4 is formed in a round bar shape smaller in diameter than the main part. A rectangular recess 14 on the front surface of the middle portion of the lock plate 5 is fitted to the rectangular protrusion 13 on the rear end portion 12, and the lock plate 5 is fixed by a screw 15 so as to be relatively non-rotatable.
[0009]
The fixed case 3 has the rear end wall portion 16 directly abutted against the front surface of the door 1, and is fixedly fastened to the door 1 by screws 17. Note that a reinforcing plate can be inserted between the fixed case 3 and the door 1.
A receiving hole 18 corresponding to the lock plate 5 is provided through the door 1 in the front-rear direction. In the unlocked state, the urging force of the spring 8 acts on the lock cylinder 4. Is held at a position immersed in the receiving hole 18. Therefore, the lock plate 5 does not rub against the front surface of the rear door 2 and is not damaged.
[0010]
As the biasing spring 8 of the lock cylinder 4, a compression coil spring whose diameter decreases from the rear end toward the front end is used. It is inserted between the annular shoulder 19 of the lock cylinder 4. A guide hole 20 in the diametric direction is formed in the rear part of the main part of the lock cylinder 4, and a dead bolt 21 and a compression coil spring 22 are accommodated in the guide hole 20. A drive cam projection 24 is formed at an eccentric position on the rear end face of the rotor 23 of the lock unit 9, and a passive groove 25 into which the drive cam projection 24 is inserted is formed in the dead bolt 21.
[0011]
When the rotor 23 is turned counterclockwise in FIG. 4 with the key 7 inserted into the key hole 26 of the rotor 23 in a state where the lock cylinder 4 is pushed in to a predetermined depth, the drive cam projection 24 causes the inner wall surface of the passive groove 25 to move. As the dead bolt 21 pushes the inner surface of the guide hole 20, the lock cylinder 4 rotates 90 degrees counterclockwise, and the tip of the dead bolt 21 faces the locking recess 27 on the inner wall surface of the fixed case 3. Come to position.
At this time, when the finger is released from the key 7, the dead bolt 21 is protruded by the bias of the compression coil spring 22 and engages with the locking recess 27. To this end, the lock cylinder 4 is locked against the fixed case 3 in the pushed-in position.
[0012]
An L-shaped guide groove 28 is formed on the inner wall surface of the fixed case 3, the vertical groove 28 a in the axial direction of the fixed case 3 and the horizontal groove 28 b in the circumferential direction of the fixed case 3. A guide pin 29 to be inserted into the guide groove 28 is inserted and fixed in the radial direction on the outer surface. The guide pin 29 penetrates the spring receiving plate 30.
When the lock cylinder 4 moves in the front-rear direction, the guide pin 29 slides in the vertical groove 28a, and when the lock cylinder 4 rotates after being pushed in, the guide pin 29 slides in the horizontal groove 28b.
[0013]
As described above, when the lock cylinder 4 is rotated by 90 degrees, the long side end portions 5a and 5b of the lock plate 5 are located at positions where they intersect and engage with the hole edge rear surfaces 6a and 6b on the short side of the lock hole 6. The two front and rear doors 1 and 2 are connected to each other, and cannot move in the horizontal direction and cannot be displaced in the front and rear direction. After the doors 1 and 2 have been interconnected, the key 7 is removed from the lock unit 9.
In order to release the interconnection between the doors 1 and 2, the key 7 is inserted into the lock unit 9, the rotor 23 is turned clockwise in FIG. The dead bolt 21 may be pulled back into the lock cylinder 4 by pressing the opposite inner wall surface.
[0014]
If the rotor 23 is rotated to 90 degrees as it is, the lock plate 5 comes to a position aligned vertically and horizontally with the lock hole 6. The plate 5 passes through the lock hole 6 to the front side. The outer surface of the fixed case 3 is covered with a cover 3a. A reinforcing plate 2a is fixed to the rear door 2, and a lock hole 6 is formed through the reinforcing plate 2a .
[0015]
【The invention's effect】
In the push-lock device of the present invention configured as described above, the front and rear two doors 1 and 2 have the rear end of the lock cylinder 4 of the push-lock device fixed to the front door 1 and the rear door 2. Since they are inserted through the lock holes 6, they are connected to each other immovably in the horizontal direction.
Further, since the two front and rear doors 1 and 2 are sandwiched between the fixed case 3 and the lock plate 5 of the push lock device, the relative displacement in the front and rear direction is suppressed, and the doors 1 and 2 are stacked. By pushing the gap between the joints, it is impossible to forcibly insert the arm and grab a product such as a precious metal from a display shelf or the like.
As described above, the front and rear two doors 1 and 2 are mutually restrained in both the left-right lateral direction and the front-rear direction, so that a sliding door push-lock device with high security can be obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view of a push lock device according to an embodiment of the present invention, showing an unlocked state.
FIG. 2 is a perspective view of the push lock device of FIG. 1, showing a locked state.
FIG. 3 is a longitudinal sectional view of the push lock device of FIG. 1, showing an unlocked state.
FIG. 4 is an enlarged sectional view taken along line AA of FIG. 1;
FIG. 5 is a perspective view showing a use state of a conventional push lock device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Door 2 Door 3 Fixed case 4 Lock cylinder 5 Lock plate 6 Lock hole 7 Key 8 Projection biasing spring

Claims (1)

Fixing a height direction of the intermediate portion front surface fixed case 3 of the front door 1, the lock cylinder 4 movably and rotatably received in a longitudinal direction to the fixed casing 3, the rear end surface of the lock cylinder 4 of the rotor 23 A drive cam projection 24 is formed at an eccentric position, and a dead bolt 21 and a biasing spring 2 of the dead bolt 21 are accommodated in a guide hole 20 in a diameter direction of a rear portion of the lock cylinder 4, and the drive bolt is driven to an inner end of the dead bolt 21. A passive groove 25 into which the cam projection 24 is inserted is formed, a locking recess 27 in which the dead bolt 21 is engaged and disengaged is formed in the rear inner wall surface of the fixed case 3, and a small-diameter rear end of the lock cylinder 4 is fixed to the fixed case 3. The lock plate 5 is connected to the rear end of the lock cylinder 4 slidably in the center hole of
In the unlocked state where the dead bolt 21 is immersed in the guide hole 20, the lock cylinder 4 is moved by the spring 8 inserted between the rear end wall 16 of the fixed case 3 and the annular shoulder 19 of the lock cylinder 4. the front end portion is protruded to the front side of the fixed casing 3 by bias of the spring 8,
The push lock cylinder 4 to the stationary casing 3 against the protruding biasing spring 8, when pressed between the annular shoulder 19 of the rear wall portion 16 and the lock cylinder 4 of the fixed case 3 the spring 8, wherein The lock plate 5 passes through the lock hole 6 of the rear door 2 and turns the lock cylinder 4 with the key 7 inserted into the key hole 26 of the rotor 23, so that the long side end portions 5 a and 5 b of the lock plate 5 are removed. Engage with the hole edge back surfaces 6a, 6b on the short side of the lock hole 6,
After the dead bolt 21 is engaged with the locking recess 27 of the fixed case 3 to lock the lock cylinder 4 with respect to the fixed case 3, the key 7 is removed from the lock cylinder 4 for a sliding door. Push lock device.

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