JP2004092118A - Door lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door lock which facilitates the blocking of a harmful opening of an existing case lock, to thereby enhance the safety of the door lock, and to provide a cylinder lock for use in the door lock. <P>SOLUTION: The door lock has the case lock 2 housed and fixed into a door body 1, and the cylinder lock 3 fixed to the surface of the door body. The cylinder lock 3 is formed of a cylinder case 3a and a rotor 3b which is inserted into the cylinder case 3a and operates a dead bolt operating portion 4 of the case lock 2. The cylinder case 3a has a tongue piece 6 arranged therein in a manner protruding between the dead bolt operating portion 4 and the harmful opening 5 which is opened in the lock case 2a of the case lock 2, communicates with the interior of the case lock 2, and allows the unauthorized operation of the dead bolt operating portion 4. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a door lock.
[0002]
[Prior art]
As a door lock which prevents an unauthorized unlocking operation from an opening formed in an outer wall of a box lock, one disclosed in Patent Document 1 is known.
[0003]
In this conventional example, a protective member is fixed to the box lock to close a harmful opening, and insertion of a jig for unauthorized unlocking from the opening is prevented.
[0004]
[Patent Document 1]
Japanese Utility Model Registration No. 3080899 [0005]
[Problems to be solved by the invention]
However, in the above-described conventional example, when taking measures against an existing door lock, it is necessary to temporarily remove the box lock from the door body. In general, doorknobs, cylinder locks, etc. are fixed to the box lock after the box lock is fixed to the door body, so removing the box lock from the door body requires removing the door knob, cylinder lock, etc. In the conventional example in which the box lock needs to be removed, there is a problem that workability is extremely poor.
[0006]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described drawbacks, and provides a door lock capable of easily closing a harmful opening of an existing box lock to enhance safety, and a cylinder lock used therefor. With the goal.
[0007]
[Means for Solving the Problems]
According to the present invention, the object is as shown in FIG.
A box lock 2 housed and fixed in the door body 1, and a cylinder lock 3 fixed to the door body surface and having inserted therein a rotor 3b capable of operating the deadbolt operating portion 4 of the box lock 2 in a cylinder case 3a. Has,
The cylinder case 3a is opened in the lock case 2a of the box lock 2, communicates with the inside of the box lock 2, and interposes the dead bolt operation part 4 between the opening 5 where the unauthorized operation is possible and the dead bolt operation part 4. This is achieved by providing a door lock on which the tongue 6 protrudes.
[0008]
In general, the box lock 2 is operated by moving the dead bolt 9 from the lock case 2a to the dead bolt operating section 4 by operating the cylinder lock 3 from the outdoor side or by the thumb turn 8 from the indoor side to perform locking and unlocking. The latch operating portion 10 is operated by a handle or a knob to move the latch bolt 11 forward and backward, and the door 1 is opened and closed.
[0009]
For this reason, the mounting of the door lock to the door body 1 is performed by first fixing the box lock 2 to the door body 1 and then fixing the cylinder lock 3, the thumb turn 8, the handle, and the like to the front and back of the door body 1. .
[0010]
To prevent the harmful opening of the box lock 2 from the harmful opening 5, in order to process the box lock 2 with respect to the box lock 2 and close the opening 5, it is necessary to remove the box lock 2 from the door body 1. Accordingly, it is necessary to remove the cylinder lock 3, the thumb turn 8, and the like, which requires a complicated operation.
[0011]
On the other hand, since the cylinder lock 3 can be easily detached from the door body 1 by itself, it is easy to replace the cylinder lock 3, and the target of the unauthorized access from the opening 5 of the box lock 2 is the cylinder lock 3. The deadbolt operation unit 4 is operated, and both are disposed close to each other in position.
[0012]
The present invention has been made by paying attention to the above points, and by providing an eaves-like tongue piece 6 on the cylinder lock 3 side to make it difficult to access the deadbolt operation unit 4, the existing box is provided. Even if the lock 2 is used, a countermeasure can be easily taken.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
As shown in FIG. 1, the door lock includes a box lock 2 fixed inside the door body 1 and a cylinder lock 3 fixed to the exterior wall surface of the door body 1. The box lock 2 is formed by holding a latch bolt 11 and a dead bolt 9 in a rectangular parallelepiped lock case 2a so as to be able to advance and retreat.
[0014]
The latch bolt 11 is urged by the compression spring 11a to the position where it protrudes from the lock case 2a, and the latch bolt operation cam (latch operation section 10) is rotated counterclockwise in FIG. It can be moved to the accommodation position inside. In order to operate the latch bolt operation cam 10 with a knob or a handle attached to the front and back surfaces of the door body 1, a shaft insertion hole 10a is formed in the center of rotation of the latch bolt operation cam 10, and the shaft insertion portion 10a A shaft such as a knob is inserted through the shaft.
[0015]
The dead bolt 9 is guided in the sliding direction by inserting a guide pin 2b erected on the lock case 2a into the guide elongated hole 9a, and the door body 1 is moved out of the lock case 2a shown in FIG. The state of being locked and housed in the lock case 2a corresponds to the unlocked state. In the locked state, the lock case 2a is provided with the dead bolt 9 in a locked state so that the dead bolt 9 does not move into the lock case 2a even if an improper operation force in the unlocking direction is directly applied to the dead bolt 9. A locking bar 12 which is locked to a lock step 9b formed on the mounting member 9 is mounted. The locking bar 12 is rotatable around a pivot c12, and its tip is urged by a torsion spring 12a in a direction in which the tip is locked to the lock step 9b.
[0016]
In order to operate the dead bolt 9, a dead drive cam (dead bolt operating section 4) is rotatably mounted in the lock case 2a. The dead drive cam 4 has an operating arm 4a protruding outward from the center of rotation, and is rotationally driven between a locked rotation position shown in FIG. 1 and an unlocked rotation position rotated clockwise by 90 ° from this. You.
[0017]
The distal end of the operating arm 4a is inserted into an operating notch 9c formed in the dead bolt 9, and the distal end of the operating arm 4a is loosely fitted to a receiving portion 2c standing upright on the lock case 2a side. The member 13 is connected. A compression spring 13a that pushes the release member 13 toward the dead drive cam 4 is interposed between the release member 13 and the receiving portion 2c, and the dead drive cam 4 is located at an intermediate position between the locking rotation position and the unlock rotation position. By setting the compression spring 13a to bend at the maximum when it is in the position, a sense of moderation is given to the rotational operation of the dead drive cam 4, and the dead drive cam 4 is stopped at either the locked position or the unlocked position. .
[0018]
Further, when the dead drive cam 4 is at an intermediate position between the locking rotation position and the unlocking rotation position, the locking bar 12 is pressed against the release member 13 against the reaction force of the torsion spring 12a, and the locking step portion 9b is engaged. An unlocking piece 13b for unlocking the lock is formed.
[0019]
Therefore, in this embodiment, when the dead drive cam 4 is rotated to the unlocking rotation position side by the cylinder lock 3 or the thumb turn 8 described later in the locked state, the unlocking piece 13b of the unlocking member 13 pushes down the locking bar 12. To release the locked state with the dead bolt 9. Thereafter, when the dead drive cam 4 is further rotated, the operating arm 4a abuts against the unlocking side wall surface 9d of the operating notch 9c, and then the dead bolt 9 is moved to the unlocking position side. On the other hand, when the dead drive cam 4 is rotationally driven to the locking rotation position in the unlocked state, the operating arm 4a abuts against the opposite side wall surface of the operating notch 9d, and then the dead bolt 9 is moved to the locking position. When the dead bolt 9 reaches the locking position, the locking bar 12 falls into the lock step 9b by the urging force of the torsion spring 12a, and thereafter, the unlocking operation by directly operating the dead bolt 9 is prohibited.
[0020]
In order to operate the dead drive cam 4, a cylinder lock 3 and a thumb turn 8 are mounted on the front and back surfaces of the door body 1. As shown in FIG. 3, the cylinder lock 3 is formed by inserting a rotor 3b into a cylinder case 3a having a mounting portion 7 at a rear end thereof, and is provided only by an unlocking key having a predetermined unlocking code. 3b can be rotated relative to the cylinder case 3a. An operation plate portion 3c is formed at the rear end of the rotor 3b, and is inserted into an operation hole 4b formed at the center of rotation of the dead drive cam 4.
[0021]
A play in the rotation direction is set between the operation plate portion 3c and the operation hole 4b, so that the difference between the position where the unlock key can be removed and inserted and the required angle of operation of the dead drive cam 4 is absorbed.
[0022]
A frusto-conical collar 14 is mounted at the head of the cylinder case 3a so as to be movable in the longitudinal direction of the cylinder case 3a. The collar 14 is urged rearward by a compression spring 14a, and the lower edge of the collar 14 is pressed against the surface of the door body 1 with the cylinder lock 3 fixed to the surface of the door body 1.
[0023]
As shown in FIGS. 1 and 2, the cylinder lock 3 configured as described above is fixed to the box lock 2 by fitting the mounting portion 7 into the cylinder holding portion 15 recessed on the lock case 2 a side. You. A rotation-preventing projection 7a for positioning in the rotation direction extends in the radial direction of the mounting portion 7, and a fixing pin insertion hole 7b is formed so as to penetrate the rotation-preventing projection 7a. A positioning through hole 15a is provided in the cylinder holding portion 15 of the lock case 2a so as to receive the rotation preventing protrusion 7a (see FIG. 1).
[0024]
As shown in FIG. 1, the lock case 2a accommodating the deadbolt 9 and the like includes a case body integrally provided with a front wall 2d, and a front panel 2e detachably screwed to the front wall 2d. The fixing pin insertion hole 7b faces in a direction perpendicular to the front wall 2d in a state where the mounting portion 7 is fitted to the cylinder holding portion 15, and the cylinder lock 3 and the lock case 2a are fixed to each other by the fixing pin insertion hole. The fixing is performed by inserting the fixing pin 16 through 7b. One end of the fixing pin 16 is supported by the rear wall of the lock case 2a, and the front end of the fixing pin 16 reaches the front wall 2d. When the front panel 2e is fixed to the front wall 2d, the fixing pin 16 is prevented from coming off and held at a predetermined position.
[0025]
In addition, an opening 5 through which the dead drive cam 4 can be opened is formed in the ceiling wall of the case body. As described above, since the play is provided between the operation plate portion 3c of the cylinder lock 3 and the operation hole 4b of the dead drive cam 4, even if the cylinder lock 3 is in the restrained state, the dead drive cam 4 is used alone. Since it is rotatable and the opening 5 is located close to the dead drive cam 4, it is not impossible to operate the dead drive cam 4 by inserting a special jig or the like from the opening 5.
[0026]
The problem here is that this unauthorized operation is impossible. To solve this problem, the cylinder lock 3 is provided with a tongue piece 6 in the shape of an eaves. The tongue piece 6 is a plate material of iron or the like having a thickness that does not cause deformation or the like during the delusion, and as shown in FIG. It is fixed using, for example.
[0027]
As shown in FIGS. 1 and 2, the tongue 6 penetrates to the rotation plane of the dead drive cam 4 while being fixed to the lock case 2 a and is interposed between the opening 5 and the dead drive cam 4.
[0028]
Therefore, in this embodiment, even if a tool or the like for unauthorized operation is inserted through the opening 5 of the lock case 2a, access to the dead drive cam 4 is prohibited by the tongue piece 6, so that security is improved. Can be.
[0029]
Further, even when the above countermeasures are applied to the existing box lock 2, first, the screws 2f exposed on the open end surface of the door body 1 are removed, and the front panel 2e is removed. It is sufficient to take out the cylinder lock 3 by pulling it out and replace it with the cylinder lock 3 having the tongue piece 6. In addition to this, it is necessary to take measures against the box lock 2 which cannot be removed without removing the thumb turn 8 and the knob. Therefore, man-hours can be greatly reduced.
[0030]
【The invention's effect】
As is clear from the above description, according to the present invention, it is possible to easily close the harmful opening of the existing box lock to enhance safety.
[Brief description of the drawings]
FIG. 1 is a diagram showing the present invention.
FIG. 2 is a sectional view of an essential part showing a state in which a cylinder lock is fixed to a box lock.
3A and 3B are views showing a cylinder lock, wherein FIG. 3A is a rear view, FIG. 3B is a side view, and FIG. 3C is an enlarged view in the C3 direction of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Door body 2 Box lock 3 Cylinder lock 3a Cylinder case 3b Rotor 4 Dead bolt operation part 5 Opening 6 Tongue piece 7 Mounting part

Claims (2)

A box lock accommodated and fixed in the door body, and a cylinder lock fixed to the surface of the door body and having inserted therein a rotor capable of operating the deadbolt operating portion of the box lock in a cylinder case,
The cylinder case is provided with a tongue piece that is provided in the lock case of the box lock, communicates with the inside of the box lock, and intervenes between the opening in which the dead bolt operation part can be illicitly operated and the dead bolt operation part. Door lock. A box lock operating cylinder lock fixed to a box lock housed and fixed in the door body and operating a deadbolt operating portion of the box lock,
A cylinder lock for box lock operation, in which a tongue piece protruding in an eave-like shape and interposed between an opening formed in a lock case of the box lock and a deadbolt operation part is protruded from an attachment portion to the box lock. .

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