JP2549353Y2 - Locking device for door with retractable knob - Google Patents

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 in which a knob is held at a retracted position when not in use.

[0002]

2. Description of the Related Art A conventional door lock device only has a function of locking a door to a fixed frame, and a separately attached knob member is used to open the door. However, for convenience of the picking operation, the picking member is provided so as to protrude from the front surface of the door. May be invited.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a knob-retractable door which is accurately held at a retracted position when not in use, and which automatically projects to a pickable position when the door is unlocked and used. To provide a locking device.

[0004]

Means for Solving the Problems Hereinafter, a lock device for a door according to the present invention will be described with reference numerals in the accompanying drawings.
An outer cylinder 2 fixed to the door 1; an inner cylinder 3 fitted in the outer cylinder 2 so as to be axially movable and non-rotatably, and having a knob 4 at a front end; A locking projection 8 is provided on the front side, which is fitted movably in the direction and is engaged with and disengaged from a locking groove 7 on the rear side of the inner flange 6 of the inner cylinder 3, and a drive shaft 9 is provided on the rear side. A lock shaft 5 and a passive hole 11 that is rotatably and axially immovably fitted into the rear portion of the inner cylinder 3 and into which the drive shaft 9 of the front lock shaft 5 is axially movable and non-rotatably fitted. A rear locking shaft 10 is provided on the front side, the connecting shaft 12 is provided on the rear side, and the stopping protrusion 13 is provided on the outer surface of the front end portion in a diametrical manner.

Further, the door lock device is disposed on the rear surface side of the outer cylinder 2 and is fixed to the connecting shaft portion 12 of the rear lock shaft 10;
And a key 17 that is inserted into the front lock shaft 5 to engage with the front receiving portion 16 of the front lock shaft 5 to rotate the front lock shaft 5; Spring 18 for urging the inner cylinder 3 forward; inner cylinder 3 and rear lock shaft 1
0, and is fixed to the inner cylinder 3 and has a regulating cylinder 23 provided with a circumferential lateral groove 24 and a continuous axial longitudinal groove 25 at the end of the lateral groove 24.

[0006]

When the lock plate 14 is in the position where the door 1 is locked with respect to the fixed frame as shown in FIG. 3, the lock projection 8 of the front lock shaft 5 is engaged with the lock groove 7 of the inner cylinder 3. Therefore, the front lock shaft 5 cannot rotate with respect to the inner cylinder 3, and the drive shaft portion 9 of the front lock shaft 5
, The rear lock shaft 10 cannot rotate with respect to the inner cylinder 3. Since the stopping protrusion 13 of the rear lock shaft 10 is engaged with the start end of the lateral groove 24 of the regulating cylinder 23, the inner cylinder 3 is stopped at the position retracted into the outer cylinder 2 despite the bias of the spring 18. The knob 4 of the inner cylinder 3 is held at a position immersed in the outer cylinder 2.

When the key 17 is engaged with the front receiving portion 16 of the front lock shaft 5 and pushed in as shown in FIG. 4, the front lock shaft 5 is retracted against the bias of the spring 18, and Position lock shaft 5
The lock projection 8 is detached from the lock groove 7 of the inner cylinder 3. As a result, the rotation lock of the front lock shaft 5 with respect to the inner cylinder 3 is released. Therefore, when the key 17 is pressed and rotated as shown in FIG. 5, the front lock shaft 5 and the rear lock shaft 10 are integrated. And the lock plate 14 comes to the unlocked position. As a result, the lock of the door 1 with respect to the fixed frame is released, and the door 1 can be opened.

When the lock plate 14 rotates to the unlocking position in this manner, the stop projection 13 of the rear lock shaft 10
Has reached the end of the lateral groove 24 of the regulating cylinder 23. As shown in FIG. 6, when the key 17 is removed from the keyhole 15 of the outer cylinder 2, the inner cylinder 3 moves forward by the urging force of the spring 18 acting via the front lock shaft 5, and the rear lock shaft 10 The restraining projection 13 enters the vertical groove 25 of the regulating cylinder 23. Inner cylinder 3
When the knob 4 at the front end of the outer cylinder 2 projects a predetermined length toward the front side of the outer cylinder 2, the stopper projection 13 abuts against the inner bottom surface of the vertical groove 25 and stops the inner cylinder 3 from further projecting. The opening operation of the door 1 is performed using the knob 4 at the projecting position.

When the knob 4 of the inner cylinder 3 is pushed into the outer cylinder 2 after the door 1 is closed, the stopper projection 13 of the rear lock shaft 10 is pushed.
Enters the end of the lateral groove 24 of the regulating cylinder 23. Therefore,
When the front lock shaft 5 and the rear lock shaft 10 are reversely rotated by the key 17, the lock plate 14 returns to the locked position again, and the stopping projection 13 of the rear lock shaft 10 reaches the start end of the lateral groove 24 of the regulating cylinder 23. I do. Insert the key 17 into the keyhole 15
When the front lock shaft 5 is pulled out from the inner cylinder 2, the front lock shaft 5 is slightly advanced by the bias of the spring 18.
In the locking groove 7.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, in order to prevent unauthorized unlocking as much as possible, a front receiving portion 16 of a front lock shaft 5 has a round bar-like projection 16a protruding at the center and a round bar-like projection 16a. 16b in the radial direction provided adjacent to
And is constituted by. Correspondingly, key 17 is
A concave portion 26a in which the round bar-shaped projection 16a is disengaged, and a concave portion 16b
Has a side projection 26b that engages and disengages. The shape of the front receiving portion 16 of the front lock shaft 5 is not limited to this, and a shape that makes it impossible or difficult to apply a normal driver, scissors, or the like is not appropriately selected. The regulating cylinder 23 is fixed to the inner cylinder 2 by a fixing pin 27 in a diametric direction. A spherical click member 22 is accommodated in the diametrical receiving hole 19 of the front lock shaft 5, and the click member 22 urged by the spring 20 is engaged with and disengaged from the inner surface receiving grooves 21, 21 of the inner cylinder 3. Position lock shaft 5
The user is notified of the rotational position of the device by an engagement sound or a touch.
The opening angle between the start and end of the lateral groove 24 of the regulating inner cylinder 23 is 9
Since it is 0 degrees, the inner surface receiving grooves 21 and 21 are provided at intervals of 90 degrees corresponding to this.

The urging spring 18 of the inner cylinder 3 and the click member 2
Each of the biasing springs 20 is formed of a compression coil spring. An annular concave portion 3 for finger hanging is provided on a knob 4 of the inner cylinder 3.
2 is provided. The interlocking shaft portion 9 of the front lock shaft 5 is formed in a square cross section, and the passive hole 11 of the rear lock shaft 10 is also formed in a square shape. Connecting shaft portion 1 of rear lock shaft 10
2 has a rectangular cross section, and the lock plate 14 fitted thereto is fixed to the rear lock shaft 10 by bolts 28. The lock plate 14 may be provided with a locking portion that is directly engaged with and disengaged from the receiving portion on the fixed frame side. In this embodiment, another lock member that is engaged with and disengaged from the receiving portion on the fixed frame side is connected. A connection hole 29 is provided in the lock plate 14. The outer cylinder 2 inserted into the mounting hole 31 of the door 1 from the front side is fastened and fixed to the door 1 by a nut 30. The outer peripheral section of the inner cylinder 3 is formed in a so-called oval shape having flat portions on both left and right sides, and the inner peripheral section of the outer cylinder 2 is similarly formed. Therefore, the inner cylinder 3 cannot rotate with respect to the outer cylinder 2.

[0012]

As described above, in the door lock device according to the present invention, the stop protrusion 13 of the rear lock shaft 10 is
The inner cylinder 3 is constrained in the outer cylinder 2 by engaging with the lateral groove 24, so that the knob 4 at the front end of the inner cylinder 3 is accurately held at a position where it does not protrude to the front side of the door 1 when not in use. Therefore, there is no danger that the knob 4 may impede the passage of the traffic, or may cause damage to clothes, objects, or the knob itself of the passerby.

When the lock plate 14 comes to the unlocking position and the stopping projection 13 of the rear lock shaft 10 enters the vertical groove 25 of the regulating cylinder 23, the inner cylinder 3 is biased by the spring 18 to move the inner cylinder 3 to the outer cylinder. 2, the knob 4 is automatically projected to the front side of the outer cylinder 2, so that the opening operation of the door 1 is smoothly performed by using the knob 4.

[Brief description of the drawings]

FIG. 1 is a front view showing a locked state of a door lock device according to an embodiment of the present invention.

FIG. 2 is a rear view of a key used in the door lock device.

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

FIG. 4 is a cross-sectional view of the lock handle device for a door in a key pressed state.

FIG. 5 is a sectional view of the door lock handle device in a key-pressed state.

FIG. 6 is a cross-sectional view of the door lock handle device in a key-removed state.

FIG. 7 is a perspective view of a regulating cylinder used in the door lock handle device.

FIG. 8 is a sectional view taken along the line BB of FIG. 3;

FIG. 9 is a sectional view taken along the line CC of FIG. 3;

FIG. 10 is a sectional view taken along line DD of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door 2 Outer cylinder 3 Inner cylinder 4 Inner cylinder knob 5 Front locking shaft 6 Inner cylinder inner flange 7 Inner cylinder locking groove 8 Front locking shaft locking projection 9 Front locking shaft drive shaft Part 10 Rear lock shaft 11 Passive hole of rear lock shaft 12 Connection shaft portion of rear lock shaft 13 Stopper projection of rear lock shaft 14 Lock plate 15 Keyhole of outer cylinder 16 Front receiving portion of front lock shaft 17 Key 18 Spring for biasing the inner cylinder 19 Receiving hole for the click member of the front lock shaft 20 Spring for biasing the click member 21 Inner surface receiving groove of the inner cylinder 22 Click member 23 Restriction cylinder 24 Lateral groove of the restriction cylinder 25 Restriction cylinder Longitudinal groove 26 Key recess 27 Fixing pin for regulating inner cylinder 28 Lock plate fixing bolt 29 Lock member connecting hole 30 Outer cylinder fixing nut 31 Door outer cylinder mounting hole 32 Finger ring annular recess for inner cylinder

Claims (1)

(57) [Scope of request for utility model registration] 1. An outer cylinder 2 fixed to a door 1; an inner cylinder 3 fitted into the outer cylinder 2 so as to be axially movable and non-rotatable, and provided with a knob 4 at a front end; A locking projection 8 is provided on the front side of the inner cylinder 3 so as to be movable in the axial direction, and is engaged with a locking groove 7 on the rear side of the inner flange 6 of the inner cylinder 3. A front lock shaft 5 provided with: a drive shaft portion 9 of the front lock shaft 5 which is rotatably and non-movably fitted in the rear portion of the inner cylinder 3 and which is fitted in a non-rotatable manner in the axial direction. A rearward lock shaft 10 in which a passive hole 11 is provided on the front side, a connecting shaft portion 12 is provided on the rear side, and a stop projection 13 is diametrically protruded on the outer surface of the front end portion; A lock plate 14 fixed to the connecting shaft portion 12 of the rear lock shaft 10; and a front lock shaft inserted through the front keyhole 15 of the outer cylinder 2. A key 17 which engages with the front receiving portion 16 of the lock member 5 to rotate the front lock shaft 5; and a spring which is housed in the passive hole 11 of the rear lock shaft 10 and urges the front lock shaft 5 to move forward. 18; a regulation which is accommodated between the inner cylinder 3 and the rear lock shaft 10 and is fixed to the inner cylinder 3 and has a circumferential lateral groove 24 and an axial longitudinal groove 25 continuous to the end of the lateral groove 24. When the lock plate 14 is in the locked position, the locking projection 8 of the front locking shaft 5 is engaged with the locking groove 7 of the inner cylinder 3, and the locking projection 13 of the rear locking shaft 10 is A locking device for a knob-retractable door in which the knob 4 of the inner cylinder 3 is immersed in the outer cylinder 2 while being positioned within the starting end of the lateral groove 24 of the regulating cylinder 23.