JP3210887B2 - Door locking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for locking a door which opens and closes by turning to a fixed frame.

[0002]

2. Description of the Related Art Conventionally, in order to avoid forgetting to lock a key when closing a door, turning a key inserted into a lock in an unlocking direction makes it impossible to remove the key. Possible locking devices are well known.

[0003]

In the above-mentioned known locking device, if the key is turned in the locking direction without completely closing the door and the key is pulled out, a situation similar to forgetting to lock the key occurs. The door you intend to open can be opened on its own.

Therefore, an object of the present invention is to provide a locking device which can solve such a problem of the prior art.

[0005]

In order to solve the above-mentioned problems, the present invention is based on an apparatus for locking a door which pivots on a fixed frame and opens and closes to the frame.

Under the premise, the gist of the present invention is as follows.

A first locking member which can be mounted near a side edge of the door extending in the vertical direction; a key which can be inserted into and removed from the first locking member; It comprises a first locking member and a detachable second locking member. The first locking member when attached near the side edge of the door penetrates the thickness direction of the door so that the key can be inserted and withdrawn from the front side of the door, and the key after insertion is unlocked. A cylinder lock, which cannot be removed when turned in the lock direction, and a plug located on the rear side of the door, which is attached to the plug of the cylinder lock which rotates together with the inserted key, and which is in a vertical plane parallel to the door. And a first rotating member rotatable at a rear surface side of the door, which is rotatable in a horizontal plane orthogonal to the door and is disengageable with the first rotating member and the second locking member. A second rotating member. The first rotating member and the plug are rotatable in the locking direction of the cylinder lock under the action of the first urging means, and the first rotating member has a diameter of the first rotating member. A first engagement portion located outward in the direction and a second engagement portion located closer to the plug than the first engagement portion are formed. The second rotating member is attached to the door via a support shaft extending vertically between a side edge of the door and the cylinder lock, and is attached to the door in a direction in which the first rotating member is engaged. Second
It is formed to be rotatable under the action of the urging means. (1) a first contact portion which abuts on a first engagement portion of the first rotating member to prevent rotation under the action of the second urging means; When the first engagement portion and the first abutment portion are in contact with each other, the first locking portion is capable of abutting against the second locking member from behind the frame to prevent the door from being opened. And the door can be locked. (2) The second pivoting member is configured such that the first pivoting member pivots in the unlocking direction to release the contact between the first engagement portion and the first contact portion, and When the door can be opened by rotating under the action of the urging means, the first urging means of the first rotating member comes into contact with the second engagement portion of the first rotating member. A second abutting portion that prevents rotation under operation and can keep the door in an unlocked state, and a second locking member of the frame from the front when closing the door in the unlocked state. The second rotating member is rotated in contact with the second urging member against the action of the second urging means, and the second contact portion is disengaged from the second engaging portion of the first rotating member. A possible second locking part.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of a door locking device according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a fixed frame 2 in which a locking device 1 is used, and a door which is pivotally mounted on the frame 2 in the direction of a double-headed arrow D via a hinge (not shown) so as to be openable and closable. 3 is a perspective view of FIG. The door 3 is closed with respect to the frame 2,
Locked by device 1. When the key 8 is inserted into the keyhole 7 of the cylinder lock 6 constituting the device 1 and the plug 9 of the cylinder lock 6 is turned in the direction of arrow A, the door 3 is unlocked, and the key 8 is released from the plug 9. It cannot be removed. However, in the cylinder lock 6, the mechanism by which the key 8 cannot be removed in this way is well known to those skilled in the art, and thus the description of the mechanism is omitted.

FIGS. 2 and 3 are a rear view of the apparatus 1 viewed from the inside of the door 3 in FIG. 1 and a sectional view taken along the line III-III in FIG. The device 1 includes a first locking member 1 attached via a bracket 10 to the inner surface near the side edge 3A of the door 3.
1 and a second attached to the inner surface of the side wall 2A of the frame 2.
It comprises a locking member 12 and a key 6.

The first locking member 11 is attached to the cylinder lock 6 penetrating between the front and rear surfaces of the door 3 and the first end of the plug 9 of the cylinder lock 6 via screws 12.
It has a rotating member 13 and a second rotating member 16 rotatably attached to a support shaft 14 extending in the vertical direction on the rear surface of the door 3. First rotating member 13 and member 1
The plug 9 to which 3 is attached is urged to rotate in the direction of arrow B by the action of a first coil spring 17 wound around the cylinder lock 6 inside the door 3. The first rotating member 13 has a stopper arm 18 extending radially outward of the plug 9 and a first engaging arm 19, and the stopper arm 18 extends horizontally from the bracket 10 for a stopper cylinder 21. And rotation in the direction of arrow B is suppressed. The first contact portion 22 of the second rotating member 16 is in contact with the distal end portion 19A of the first engagement arm 19. One end 17A of the first coil spring 17
Is locked to the arm 18 at the through hole 18A of the stopper arm 18, and the other end 17B is wound around the column 21.

The second rotating member 16 includes upper and lower engaging plates 23 and 24 which are parallel to each other and have the same shape and the same size, and a connecting portion 25 which extends in the up and down direction and is connected to the engaging plates 23 and 24. It is urged by a second coil spring 16A wound on the support shaft 14 to be rotatable in the direction of arrow C so as to engage with the first rotating member 13. Each end of the second coil spring 16A is connected to upper and lower engagement plates 23, 24.
Are engaged with the respective engaging plates 23 and 24 at the through holes 26. Each of the upper and lower engagement plates 23 and 24 has a second engagement arm 27 and a third engagement arm 28 which are parallel to each other, and a concave portion 29 between these two arms 27 and 28. As shown in FIG. 3, the third engagement arm 2
Reference numeral 8 extends longer to the left in the drawing than the second engagement arm 27, and has a slope 31 at the top end on the upper right.

The second locking member 12 has upper and lower arms 32 and 33 extending in the horizontal direction, respectively, and extends between the mounting bracket 30 fixed to the frame 2 and the arms 32 and 33. And a cylindrical receiving member 34. The diameter of the metal fitting 34 is formed smaller than the width of the concave notch 29 of the second rotating member 16.

As shown in FIGS. 2 and 3, when the door 3 is closed, the lower engagement plate 24 of the second rotating member 16 of the first and second locking members 11 and 12 is moved to the side surface of the plate. The first contact portion 22 of the second rotating member 1 is in contact with the distal end portion 19A of the first engagement arm of the first rotating member 13.
6 does not rotate in the direction of arrow C. Further, the metal fitting 34 is accommodated in the concave notch 29 of the second rotating member 16, and when the door 3 moves in the opening direction, the second engagement arm 27 comes into contact with the metal fitting 34 from the rear. The door 3 does not open. In FIG. 3, a cushion material 37 is adhered to the side wall 2 </ b> A of the frame 2, and the vicinity of the side edge 3 </ b> A of the door 3 is in contact with the cushion material 37.

FIGS. 4 and 5 are similar to FIGS. 2 and 3, except that the device 1 is unlocked and the door 3 is open. In FIG. 1, when the inserted key 8 turns in the direction of arrow A, the plug 9 of the cylinder lock 6 and the first rotating member 13 attached to the plug 9 resist the urging of the first coil spring 17. By rotating in the direction of arrow A, the contact between the first engaging arm tip 19A and the first contact portion 22 of the second rotating member 16 is released. Second rotating member 16
Is rotated in the urging direction C of the second coil spring 16A, and the second contact portion 22A, which is the edge of the lower engagement plate 24, reaches directly below the first engagement arm 19, and The first coil spring 1 of the first rotating member 13 in contact with the lower edge portion 19B
7 is prevented from rotating in the biasing direction B. When the second rotation member 16 rotates in the direction C in this manner, the second engagement arms 27 of the upper and lower engagement plates 23 and 24 are received from the rear of the receiving fitting 34 to the side when the door 3 is opened. It moves to a position where it does not come into contact with the fitting 34 (see FIG. 5). The third engagement arm 28 presses against the front surface of the receiving member 34 under the bias of the second coil spring 16A, and can move the door 3 in the opening direction by the reaction force at that time.

When the door 3 is open, even if the key 8 inserted into the cylinder lock 6 is turned in the locking direction B, the first turning member 13 is in contact with the second turning member 16 and the locking direction is not changed. Since the key 8 does not rotate to B, the key 8 cannot be removed from the plug 9. In other words, when the door 3 is open, the cylinder lock 6 cannot be locked.

To lock the device 1, the door 3 may be pressed toward the frame 2 in FIG. The third engagement arm 28 rotates the upper and lower engagement plates 23 and 24 in a direction opposite to the arrow direction C by the slope 31 contacting the front surface of the metal fitting 34, and the second engagement arm 28. The arm 27 moves to the rear of the receiving member 34, and the second contact portion 22A of the lower engagement plate 24 separates from the lower edge portion 19B of the first engagement arm 19 that has been in contact therewith. Thereafter, the first rotating member 13 rotates in the direction of arrow B under the bias of the first coil spring 17 to return to the state shown in FIGS. 2 and 3, and the key 8 can be removed from the plug 9.

[0018]

According to the locking device constructed as described above, if the door is open, the key cannot be removed. Therefore, when the door is closed, the presence of the key is noticed and the user forgets to lock the key. There is no. Further, since the apparatus cannot be locked unless the door is closed, it is possible to eliminate the erroneous operation of the related art in which the locking operation is performed even when the door is not completely closed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a door and a frame in which a locking device is used.

FIG. 2 is a partial rear view of FIG. 1;

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a view similar to FIG. 2 when the locking device is in an unlocked state.

FIG. 5 is a view similar to FIG. 3 when the locking device is in an unlocked state;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Locking device 2 Frame 3 Door 6 Cylinder lock 8 Key 9 Plug 11 1st locking member 12 2nd locking member 13 1st rotation member 14 Support shaft 16 2nd rotation member 16A 2nd urging means 17 1st attachment Urging means 19 first engagement arm 19A first engagement portion 19B second engagement portion 22 first contact portion 22A second contact portion 27 first locking portion (second engagement arm) 28 second locking portion ( Third engagement arm)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-50574 (JP, A) JP-A-61-28863 (JP, U) JP-A-2-20657 (JP, U) JP-B-37 6944 (JP, B1) Jikken 42-5356 (JP, Y1) Jikken 42-4234 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) E05B 11/02 E05B 63 / 18 E05B 65/00 E05B 65/02 E05B 65/06 E05B 57/00 E05C 3/24

Claims (1)

(57) [Claims] 1. A device for locking a door that opens and closes by rotating with respect to a fixed frame to the frame, wherein the device is attached near a side edge of the door that extends in a vertical direction. A first lockable member, a key that can be inserted into and removed from the first lockable member, and a second lockable member that is attached to the frame and that is detachable from the first lockable member. The first locking member when attached near the side edge of the door penetrates through the thickness direction of the door, and the key can be inserted and removed from the front side of the door, and the key after insertion is in the unlocking direction. A cylinder lock which cannot be removed when turned, and a plug which is attached to a plug of the cylinder lock on the rear side of the door and which rotates together with the inserted key and rotates in a vertical plane parallel to the door. A possible first pivoting member, on the rear side of the door, A second rotating member that is rotatable in a horizontal plane to be engaged with and disengaged from the first rotating member and the second locking member, wherein the first rotating member and the plug are A first engagement member which is rotatable in the locking direction of the cylinder lock under the action of the first urging means, and which is located on a peripheral portion of the first rotation member and located radially outward of the first rotation member. A mating portion and a second engaging portion that is located closer to the plug than the first engaging portion is formed, and wherein the second rotating member is configured to include a side edge of the door and the cylinder lock. And is attached to the door via a vertically extending support shaft, and is formed to be rotatable under the action of the second urging means in a direction to engage with the first rotating member, The second rotating member abuts on the first engaging portion of the first rotating member to prevent rotation under the action of the second urging means. When the first abutment portion is in contact with the first engagement portion and the first abutment portion, the second locking member abuts from behind the frame to prevent the door from opening. (2) the first pivoting member pivots in an unlocking direction to lock the door and the first engagement portion and the first locking portion. When the contact with the contact portion is released and the door can be opened by rotating under the action of the second urging means, the contact with the second engaging portion of the first rotating member is achieved. The second pivot member can prevent the first pivot member from rotating under the action of the first urging means, and can keep the door unlocked.
When closing the door in the unlocked state, the abutting portion contacts the second locking member of the frame from the front to rotate the second rotating member against the action of the second urging means. Moving the second
A second locking portion capable of disengaging the contact portion from the second engagement portion of the first rotating member.