JP2002054327A - Cylinder lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylinder lock of which the rotor can be simply pulled out and exchanged performed only by inserting a change master key. SOLUTION: A stopper storing hole 12 crossing at the deepest portion of a keyway 3 is formed in a rotor 2, a stopper link-disengage groove 13 is formed to a ring shape on the inner peripheral surface of a fixed external cylinder 1, the tip of the stopper 11 protruded and energized by a spring 14 is linked to the stopper link-disengage groove 13, an edge surface 15a of a key insert hole 15 is pushed by a stopper key code portion formed at the side portion of the farthest tip portion of a change master key 16, and the tip portion of the stopper 11 is disengaged from the stopper disengageable groove 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder lock that facilitates extraction and replacement of a rotor using a change master key.

[0002]

2. Description of the Related Art In a conventional cylinder lock, a rotor is accommodated in a fixed outer cylinder, and the rotor is non-rotatably restrained with respect to the fixed outer cylinder by a tumbler biased by a spring. The key code part is formed unevenly on the side of the individual key used only, the individual key is inserted into the axial keyway of the rotor, the tumbler is pressed by the key code part, and the rotation restriction of the rotor by the tumbler is released. It has become.

In such a cylinder lock, when the individual key is stolen or lost, the rotor is removed from the fixed outer cylinder and the permutation of the tumbler is performed in order to prohibit the use of the individual key and secure security. It is necessary to exchange a different key code for a different rotor.

However, in the conventional cylinder lock, the flange at the front end of the rotor is engaged with the annular step at the front end of the inner peripheral surface of the fixed outer cylinder, while the flange at the rear end of the inner peripheral surface of the fixed outer cylinder is engaged. By forming an annular receiving groove, the outer peripheral edge of the C-ring type stopper is engaged with the annular receiving groove, and the inner peripheral edge of the stopper is engaged with the rear end face of the rotor, thereby moving the rotor in the axial direction. Has been blocked.

[0005] Therefore, when replacing the rotor, after unlocking using a change master key commonly used for all the locks belonging to the same lock group, a special tool is used from the rear side of the fixed outer cylinder. Then, it is necessary to reduce the diameter of the stopper so that the outer peripheral edge of the stopper escapes from the annular receiving groove of the fixed outer cylinder.

In this special tool, two grip levers are connected by a pivot pin at a position slightly before the tip, and the tip of each grip lever is bent at a right angle to form a thin rod-like projection at each tip. Things. In use, each thin rod-shaped protrusion is inserted into a small hole at each end of the C-ring-shaped stopper, and the grip lever is tightened to reduce the diameter of the stopper, but because it is a work in a narrow space, Also,
The fact is that the work often does not proceed smoothly because the thin rod-like projection is easily detached from the small hole.

[0007]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a cylinder lock in which a rotor can be easily removed and replaced simply by inserting a change master key without using a special tool which is not easy to handle. It is.

[0008]

Means for Solving the Problems According to the present invention, in order to solve the above problems, the rotor 2 is housed in the fixed outer cylinder 1 and the rotor 2 is moved with respect to the fixed outer cylinder 1 by the tumbler 5 urged by the spring 7. The key code portion 9 is formed on the side of the individual key 8 used only for a specific lock belonging to the same lock group to be restricted so as not to rotate, and the individual key 8 is inserted into the keyway 3 in the axial direction of the rotor 2. Then, in the cylinder lock in which the tumbler 5 is pushed by the key code portion 9 and the rotation constraint of the rotor 2 by the tumbler 5 is released, the stopper storage hole 12 intersecting the innermost portion of the keyway 3 is formed in the diameter direction of the rotor 2. A stopper engaging / disengaging groove 13 facing the stopper housing hole 12 is formed in the inner peripheral surface of the fixed outer cylinder 1, and the stopper 11 housed in the stopper housing hole 12 is formed by the spring 1. 4, the leading end of the stopper 11 is engaged with the stopper engaging / disengaging groove 13, and the side of the foremost end of the change master key 16 commonly used for all locks belonging to the same lock group. The stopper key code portion 17 is formed on the stopper 11, and the edge 15 a of the key through hole 15 of the stopper 11 is pushed by the stopper key code portion 17, so that the tip end of the stopper 11 escapes from the stopper engaging groove 13.

[0009]

According to the cylinder lock of the present invention, when the individual key 8 is inserted into the keyway 3 of the rotor 2 at the unlock position, the key code portion 9 presses the edge 10a of the key through hole 10, so that each tumbler 5 Reciprocates in the diameter direction of the rotor 2, and the tip portion is a tumbler engaging / disengaging groove 2 for unlocking the fixed outer cylinder 1.
3, when the entire length of the key function portion of the individual key 8 is inserted into the rotor 2, the tips of all the tumblers 5 escape from the corresponding tumbler engaging / disengaging grooves 23, and the entire tumbler 5 is The rotor 2 retreats into the tumbler storage hole 4.

As a result, the rotor 2 with respect to the fixed outer cylinder 1 is
When the rotor 2 is rotated to the locking position by a predetermined angle by the individual key 8, the tumbler storage hole 4 of the rotor 2 faces the tumbler engaging / disengaging groove 6 for the locking position of the fixed outer cylinder 1. I do. At this stage, when the individual key 8 is pulled out from the keyway 3 of the rotor 2, each tumbler 5 reciprocates in the diameter direction of the rotor 2 as the key code portion 9 passes through the key through hole 10 of the tumbler 5. When the tips repeatedly enter and exit the tumbler engaging / disengaging groove 6 of the fixed outer cylinder 1 and the entire length of the key function portion of the individual key 8 is removed from the rotor 2, the tips of all the tumblers 5 become springs 7.
The rotor 2 is engaged with the tumbler engaging / disengaging groove 6 by the urging force, and the rotor 2 is locked non-rotatably with respect to the fixed outer cylinder 1 in the locking position.

When replacing the rotor 2 for the reason that the individual key 8 has been stolen, the change master key 16 is inserted into the keyway 3 of the rotor 2 at the locked position.
In this insertion process, the key code portion 9 pushes the edge 10a of the key through hole 10, so that each tumbler 5
Reciprocating in the diametrical direction, the tip end repeatedly enters and exits the locking position tumbler engaging / disengaging groove 6 of the fixed outer cylinder 1, and when the entire length of the key function portion of the individual key 8 is inserted into the rotor 2, The tip of the tumbler 5 escapes from the corresponding tumbler engaging / disengaging groove 6, and the entire tumbler 5 retreats into the tumbler storage hole 4 of the rotor 2.

In the final stage in which the change master key 16 is inserted, the stopper key code portion 17 presses the edge surface 15a of the key through hole 15 of the stopper 11, so that the distal end of the stopper 11 is engaged with the stopper engaging groove. Escape from 13. As a result, the constraint of the rotor 2 on the fixed outer cylinder 1 by the stopper 11 is released, and the rotor 2 is kept in the fixed outer cylinder 1 with the change master key 16 inserted.
Extracted from

When a new rotor 2 is accommodated in the fixed outer cylinder 1, the change master key 16 is inserted into the rotor 2 in advance, and all the tumblers 5 and the stoppers 11 are retracted and set in the rotor 2. With the change master key 16 inserted, the rotor 2 is inserted into the fixed outer cylinder 1 in a predetermined direction, and the change master key 16 is removed from the rotor 2 after sufficient insertion. As a result, the tumbler 5 urged by the spring 7 engages with the tumbler engaging / disengaging groove 6, while the stopper 11 urged by the spring 14 engages with the stopper engaging / disengaging groove 13, thereby removing the rotor 2. Will be blocked. When the rotor 2 rotates, the stopper 11 moves in the stopper engaging / disengaging groove 13.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, the cylinder lock is a disk tumbler type cylinder lock using a disk tumbler as a tumbler 5, and a tumbler storage hole 4 intersecting with an axial keyway 3 of a rotor 2 is provided. A tumbler engaging / disengaging groove 6 for locking position is provided on the inner peripheral surface of the fixed outer cylinder 1, provided in the diameter direction of the rotor 2, and a disk tumbler 5 movably stored in the tumbler storage hole 4 is provided.
Is urged by a spring 7 so that the tip portion engages with
A key code portion 9 formed with concavities and convexities on the side of an individual key 8 is brought into contact with an edge surface 10a of a key through-hole 10 of a disk tumbler 5 so that a tip portion of the disk tumbler 5 escapes from a tumbler engaging / disengaging groove 6. It is.

This cylinder lock is of a two-point type in which the individual key 8 can be inserted and removed from the keyway 3 of the rotor 2 at both the locking position and the unlocking position. An unlocking position tumbler engaging / disengaging groove 23 is provided at a predetermined angle, for example, 90 degrees away from the position tumbler engaging / disengaging groove 6. In the case of a single-pull-out type in which the individual key 8 is not inserted / removed at the unlocking position, the unlocking position tumbler engaging / disengaging groove 23 is unnecessary.

The stopper 11 is formed by stamping a plate, and comprises a main body having an outer peripheral edge having the same diameter as the rotor 2 and a pair of legs connected to the inner central portion thereof. The key through hole 15 is formed at the center. In the illustrated embodiment, the stopper engaging groove 1
Although 3 is formed in an annular shape, it is sufficient if the rotor 2 serves as a relief when the rotor 2 rotates forward and reverse between the unlocking position and the locking position.
It may be formed in an arc shape instead of an annular shape. The urging spring 7 of the locking member 5 and the urging spring 14 of the stopper 11
Are composed of compression coil springs. Spring 1
4 is formed so as to communicate with an extension of the key through hole 15, one end of the spring 14 abuts on the inner end face of the housing 24, and the other end of the spring 14 is a part of the rotor 2, that is, the keyway. 3 is in contact with the shoulder 3a.

The present invention provides not only a disk tumbler type cylinder lock but also a pin tumbler type cylinder lock formed by combining a drive pin and a driven pin to form a tumbler, and a pin tumbler type formed by combining a drive pin, an intermediate pin and a driven pin. The present invention can be applied to a cylinder lock, and is not particularly limited to a built-in locking mechanism.

A stopper plate 1 is provided on the rear end angular shaft portion 2a of the rotor 2.
9 are fitted and fastened and fixed by bolts 18. When the rotor 2 is rotated to the locking position, the stopper plate 19 engages with the receiving member 20 on the fixed frame 21 side, and locks the door panel 22 with respect to the fixed frame 21.

[0019]

As described above, in the cylinder lock of the present invention, the stopper storage hole 12 intersecting the innermost portion of the keyway 3 is formed in the rotor 2, and the stopper engagement / disengagement groove 13 is formed on the inner periphery of the fixed outer cylinder 1. The distal end of the stopper 11 formed annularly on the surface and urged to project by the spring 14
3, the edge 15 a of the key through hole 15 of the stopper 11 is pushed by the stopper key code portion 17 formed on the side of the foremost portion of the change master key 16, and the tip of the stopper 11 is engaged with the stopper. Since the rotor 2 is made to escape from the groove 13, it is not necessary to use a special tool that is not easy to handle, and the rotor 2 can be easily removed and replaced only by inserting the change master key 16.

[Brief description of the drawings]

FIG. 1 is a front view of a cylinder lock according to one embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1, and the locking device is in a locked state.

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

FIG. 4 is a sectional view taken along line CC of FIG. 2;

FIG. 5 is a sectional view taken along line DD of FIG. 2;

FIG. 6 is a right side view of an individual key used for the cylinder lock of FIG. 1;

FIG. 7 is a right side view of a change master key used for the cylinder lock of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed outer cylinder 2 Rotor 3 Keyway 4 Tumbler storage hole 5 Tumbler 6 Tumbler engaging / disengaging groove for locking position 7 Tumbler biasing spring 8 Individual key 9 Key code part 10 Tumbler key through hole 11 Stopper 12 Stopper storage hole 13 Stopper engaging groove 14 Stopper biasing spring 15 Stopper key through hole 16 Change master key 17 Stopper key code

Claims (1)

[Claims] 1. A fixed outer cylinder 1 accommodates a rotor 2 and a spring 7
The rotor 2 is non-rotatably constrained with respect to the fixed outer cylinder 1 by the tumbler 5 biased by the above, and the key code portion 9 is provided on the side of the individual key 8 used only for a specific lock belonging to the same lock group. In the cylinder lock, the individual key 8 is inserted into the keyway 3 of the rotor 2 in the axial direction of the rotor 2 and the tumbler 5 is pressed by the key code portion 9 to release the rotation constraint of the rotor 2 by the tumbler 5. Stopper storage hole 12 that intersects the innermost part of
Is formed in the diameter direction of the rotor 2, and the stopper engagement / disengagement groove 13 facing the stopper storage hole 12 is formed in the fixed outer cylinder 1.
The stopper 11 formed on the inner peripheral surface of the stopper 11 and accommodated in the stopper storage hole 12 is projected and urged by a spring 14 so that the distal end of the stopper 11 is engaged with the stopper engaging / disengaging groove 13.
A key code portion 17 for the stopper is formed on the side of the foremost portion of the change master key 16 commonly used for all the locks belonging to the same lock group, and the key code hole 17 for the stopper 11 is formed by the key code portion 17 for the stopper. A cylinder lock characterized in that the end face of the stopper (11) is pushed out of the stopper engaging / disengaging groove (13) by pushing an edge surface (15a) of the cylinder lock (15).