JPH08587U - Locking device for door with retractable knob - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a locking / unlocking door locking device that is properly held in the retracted position when not in use, and that automatically protrudes to the retractable position when the door is unlocked. [Structure] An inner cylinder 3 fitted in an outer cylinder 2 and provided with a knob portion 4; and a locking projection 8 fitted in a front part of the inner cylinder 3 and engaged with and disengaged from a locking groove 7 of the inner cylinder 3. The front lock shaft 5 and the rear lock shaft 10 fitted in the rear portion of the inner cylinder 3 and having the passive hole 11 into which the drive shaft portion 9 of the front lock shaft 5 is fitted.
A spring 18 for urging the front lock shaft 5 to move forward;
A restriction cylinder 23 that is housed between the inner cylinder 3 and the rear lock shaft 10 and fixed to the inner cylinder 3, and that has a lateral groove 24 in the circumferential direction and an axial longitudinal groove 25 continuous to the end of the lateral groove 24. The diametrical stop projection 13 of the rear lock shaft 10 is positioned within the starting end of the lateral groove 24 of the restriction cylinder 23, and the knob 4 of the inner cylinder 3 is retracted into the outer cylinder 2.

Description

[Detailed description of the device]

[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 in a retracted position when not in use.

[0002]

2. Description of the Related Art A conventional door locking device only has a function of locking a door to a fixed frame body, and a separately mounted knob member is used to open the door. However, for the convenience of the picking operation, the picking member is provided so as to project to the front of the door. May cause damage.

[0003]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to hold a retractable portion of a picking portion that is properly held in the retracted position when not in use, and automatically protrudes to the pickable position when the door is unlocked. A door locking device is provided.

[0004]

[MEANS FOR SOLVING THE PROBLEMS] A door locking device of the present invention includes an outer cylinder 2 fixed to a door 1; and an axial direction in the outer cylinder 2. An inner cylinder 3 fitted movably and non-rotatably to the front end and provided with a knob 4; a rear surface of an inner flange 6 of the inner cylinder 3 fitted axially movably into the front part of the inner cylinder 3. Side locking shaft 5 provided with a locking projection 8 which engages and disengages with the locking groove 7 on the front side and a drive shaft part 9 on the rear side; and is rotatable in the rear part of the inner cylinder 3 and axially. The drive shaft portion 9 of the front lock shaft 5 that is fitted immovably is fitted in such a way that it is axially movable and non-rotatable. A passive hole 11 is provided on the front surface side, a connecting shaft portion 12 is provided on the rear surface side, and a front end outer surface is provided. It has a rear lock shaft 10 in which a stop protrusion 13 is diametrically provided.

Further, this door locking device is arranged 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 by a lock plate 14; And the key 17 that engages with the front surface receiving portion 16 of the front lock shaft 5 to rotate the front lock shaft 5; and is housed in the passive hole 11 of the rear lock shaft 10 to move the front lock shaft 5 forward. A spring 18 for urging and moving toward one side; a spring 18 housed between the inner cylinder 3 and the rear lock shaft 10 and fixed to the inner cylinder 3, and a lateral groove 24 in the circumferential direction and an axial direction continuous to the end of the lateral groove 24. It has a regulating cylinder 23 provided with a vertical groove 25.

[0006]

As shown in FIG. 3, when the lock plate 14 is at the position where the door 1 is locked with respect to the fixed frame, the lock projection 8 of the front lock shaft 5 engages 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 engages with the passive hole 11 of the rear lock shaft 10. Therefore, the rear lock shaft 10 cannot rotate with respect to the inner cylinder 3. Since the stop projection 13 of the rear lock shaft 10 is engaged with the starting end of the lateral groove 24 of the restriction cylinder 23, the inner cylinder 3 is stopped at the position retracted into the outer cylinder 2 regardless of the bias of the spring 18. The grip portion 4 of the inner cylinder 3 is held in the outer cylinder 2 at a position where it is recessed.

As shown in FIG. 4, when the key 17 is engaged with the front receiving portion 16 of the front lock shaft 5 and pushed in, the front lock shaft 5 retracts against the bias of the spring 18, The locking projection 8 of the front lock shaft 5 is disengaged from the locking groove 7 of the inner cylinder 3. As a result, the rotation constraint of the front lock shaft 5 with respect to the inner cylinder 3 is released. Therefore, when the key 17 is rotated while being pushed in as shown in FIG. 5, the front lock shaft 5 and the rear lock shaft 10 are rotated. Rotate integrally 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 is thus rotated to the unlocked position, the stop projection 13 of the rear lock shaft 10 reaches the end of the lateral groove 24 of the restriction cylinder 23. As shown in FIG. 6, when the key 17 is pulled out from the key hole 15 of the outer cylinder 2, the inner cylinder 3 is moved forward by the biasing force of the spring 18 acting via the front lock shaft 5, and the rear lock shaft 10 is moved. The stop protrusion 13 enters into the vertical groove 25 of the restriction cylinder 23. When the knob 4 at the front end of the inner cylinder 3 protrudes toward the front side of the outer cylinder 2 by a predetermined length, the stop projection 13 contacts the inner bottom surface of the vertical groove 25 to prevent the inner cylinder 3 from further projecting. To do. The opening operation of the door 1 is performed by using the knob portion 4 in the protruding position.

When the knob 4 of the inner cylinder 3 is pushed into the outer cylinder 2 after the door 1 is closed, the stop projection 13 of the rear lock shaft 10 enters the end of the lateral groove 24 of the restriction cylinder 23. Therefore, when the front lock shaft 5 and the rear lock shaft 10 are rotated in the reverse direction by the key 17, the lock plate 14 returns to the locked position again, and the stop projection 13 of the rear lock shaft 10 is locked by the lateral groove 24 of the restriction cylinder 23. Reach the beginning of. When the key 17 is pulled out from the key hole 15 of the outer cylinder 2, the front lock shaft 5 is slightly advanced by the urging force of the spring 18, and the locking projection 8 of the front lock shaft 5 is fitted in the locking groove 7 of the inner cylinder 2. Engage.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the illustrated embodiment, in order to prevent unauthorized unlocking as much as possible, the front receiving portion 16 of the front lock shaft 5 has a round bar-shaped projection 16a protruding in the center and the round bar-shaped projection 16a. 16a and a radial recess 16b provided adjacent to 16a. Correspondingly, the key 17 has a concave portion 26a for engaging and disengaging the round bar-shaped protrusion 16a and a side surface protrusion 26b for engaging and disengaging the recess 16b. The shape of the front surface receiving portion 16 of the front lock shaft 5 is not limited to this, and a shape in which a normal driver or scissor tool is not applicable or difficult is not appropriately selected. The restriction cylinder 23 is fixed to the inner cylinder 2 by a diametrically fixed pin 27. 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 disengages from the inner surface receiving grooves 21 and 21 of the inner cylinder 3, The user is informed of the rotational position of the front lock shaft 5 by engaging sound or feeling. Since the opening angle between the starting end and the terminating end of the lateral groove 24 of the regulation inner cylinder 23 is 90 degrees, the inner surface receiving grooves 21, 21 are provided at 90 degree intervals correspondingly.

The biasing spring 18 of the inner cylinder 3 and the biasing spring 20 of the click member 22 are both compression coil springs. The knob 4 of the inner cylinder 3 is provided with a finger-holding annular recess 32. The interlocking shaft portion 9 of the front lock shaft 5 has a rectangular cross section, and the passive hole 11 of the rear lock shaft 10 also has a rectangular cross section. The connecting shaft portion 12 of the rear lock shaft 10 has a square cross section, and the lock plate 14 fitted therein is fixed to the rear lock shaft 10 by bolts 28. The lock plate 14 may be provided with a locking portion that engages and disengages directly with the receiving portion on the fixed frame body side, but in this embodiment, another locking member that engages and disengages with the receiving portion on the fixed frame body side is connected. The lock plate 14 is provided with a connecting hole 29. 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 the nut 30. The outer peripheral cross 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 cross section of the outer cylinder 2 is also formed in the same manner. 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 inner cylinder 3 is restrained in the outer cylinder 2 by the stop projection 13 of the rear lock shaft 10 engaging with the lateral groove 24 of the restriction cylinder 23. Therefore, since the knob 4 at the front end of the inner cylinder 3 is accurately held at a position where it does not project to the front side of the door 1 when not in use, the knob 4 may be an obstacle to passing or clothing of passersby. There is no risk of damaging the equipment, the implement, or the picking part itself.

Further, when the lock plate 14 comes to the unlocked position and the stop projection 13 of the rear lock shaft 10 enters the vertical groove 25 of the restriction cylinder 23, the inner cylinder 3 is moved outward by the bias of the spring 18. As the knob 4 advances in the axial direction of the cylinder 2 and the knob 4 automatically projects to the front side of the outer cylinder 2, the opening operation of the door 1 is smoothly performed by using the knob 4.

[Brief description of drawings]

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

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

3 is a cross-sectional view taken along the line AA of FIG.

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

FIG. 5 is a cross-sectional view of the door lock handle device in a key pushing 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 restriction cylinder used in the door lock handle device.

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

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

10 is a cross-sectional view taken along line DD of FIG.

[Explanation of symbols]

 1 Door 2 Outer Cylinder 3 Inner Cylinder 4 Inner Cylinder Grip 5 Front Lock Shaft 6 Inner Cylinder Inner Collar 7 Inner Cylinder Lock Groove 8 Front Lock Shaft Lock Protrusion 9 Front Lock Shaft Drive Shaft Part 10 Rear lock shaft 11 Passive hole of rear lock shaft 12 Connecting shaft part of rear lock shaft 13 Blocking protrusion of rear lock shaft 14 Lock plate 15 Key hole of outer cylinder 16 Front receiving part of front lock shaft 17 Key 18 Energizing spring for inner cylinder 19 Receiving hole for click member of front lock shaft 20 Energizing spring for click member 21 Inner surface receiving groove of inner cylinder 22 Click member 23 Restricting cylinder 24 Horizontal groove for restricting cylinder 25 Restricting cylinder Vertical groove 26 Recess for key 27 Fixed pin for regulation inner cylinder 28 Lock plate fixing bolt 29 Lock member connecting hole 30 Outer cylinder fixing nut 31 Door outer cylinder mounting hole 32 Inner cylinder finger-holding annular recess

Claims (1)

[Scope of utility model registration request] 1. An outer cylinder (2) fixed to a door (1); an inner cylinder (3) fitted in the outer cylinder (2) so as to be axially movable and non-rotatable and having a knob portion (4) at a front end; Of the inner cylinder 3 of the inner cylinder 3 is engaged with the locking groove 7 on the rear side of the inner flange 6 to engage with and disengage from the locking groove 7. And a front lock shaft 5 provided with; and a drive shaft portion 9 of the front lock shaft 5 which is rotatably and axially immovably fitted in the rear part of the inner cylinder 3 and axially movable and non-rotatably fitted. A rear-side lock shaft 10 having a passive hole 11 provided on the front side, a connecting shaft portion 12 provided on the rear surface side, and a stop protrusion 13 diametrically projecting on the outer surface of the front end; A lock plate 14 fixed to the connecting shaft portion 12 of the rear lock shaft 10; A key 17 that engages with the front surface receiving portion 16 of 5 to rotate the front lock shaft 5; and a spring that is housed in the passive hole 11 of the rear lock shaft 10 and biases the front lock shaft 5 to move forward. 18; a regulation that is housed between the inner cylinder 3 and the rear lock shaft 10 and fixed to the inner cylinder 3, and that has a lateral groove 24 in the circumferential direction and an axial vertical 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 lock shaft 5 is engaged with the locking groove 7 of the inner cylinder 3 and the locking projection 13 of the rear lock shaft 10 is formed. A knob portion retractable door locking device in which the knob portion 4 of the inner cylinder 3 is recessed into the outer cylinder 2 while being positioned within the starting end of the lateral groove 24 of the regulation cylinder 23.