JP2963059B2 - Lock replacement lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a replaceable lock, and more particularly to a lock for replacing a lock which can be replaced from the front.

[0002]

2. Description of the Related Art In general, keys for locks, such as lockers and valuables boxes, which are used arbitrarily by an unspecified number of people, are easily lost and, therefore, have to be frequently replaced. Conventionally, locks requiring frequent replacement have been proposed in which only the inner cylinder can be replaced with a special key from the front without opening a locker or door and performing replacement work from the back.

[0003]

The locks in which the conventional inner cylinder can be replaced have been limited to the disk tumbler type lock. This is because in the disk tumbler type lock, each tumbler is stored in the inner cylinder at the time of unlocking, so that there is no problem even if the inner cylinder is pulled out. However, the disc tumbler type lock has a disadvantage that the number of key differences is small. On the other hand, in the pin tumbler cylinder lock that can be obtained with a large number of key differences,
When the inner cylinder was pulled out in the unlocked state, the spring and the driver pin popped out, and it was not possible to extract only the inner cylinder and replace it.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lock exchange lock which can be replaced from the front without opening a door of a locker or a valuables box with a lock of a pin tumbler type having a large number of different keys. It is in.

[0005]

A lock replacement lock according to the present invention is a lock provided with an inner cylinder and an outer cylinder, and a connecting cam attached to a rear end of the inner cylinder; A cam member inserted into the rear end of the connecting cam, a rotation-regulating pin arranged from the outer cylinder toward the engagement groove of the inner cylinder, and a case body for storing the lock are erected on the case main body. Locking / unlocking within the range of the rotation restricting pin with a normal key, and rotation of the lock beyond the range of the rotation restricting pin with an exchange key to remove the lock. It is what it was.

The connecting cam has an annular groove for rotating the retaining pin and an open groove formed perpendicular to the annular groove, and when the retaining pin is guided by the open groove. The lock is removable. Further, the lock is a pin tumbler lock in which rotation of an inner cylinder and an outer cylinder is regulated by a pin tumbler.

As described above, according to the lock for exchanging the lock portion according to the present invention, the lock can be replaced from the front of the pin tumbler lock having a large number of key differences.

[0008]

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an enlarged longitudinal sectional view of a lock replacement lock according to an embodiment of the present invention, FIG. 2 is an assembly view of main parts of the lock replacement lock, and FIG. 3 is a rotation restricting pin of the lock replacement lock. It is an important section sectional view shown. The lock replacement lock according to the present embodiment includes a lock body 12 having an inner cylinder 10 and an outer cylinder 11, a connecting cam 13 attached to a rear end 10 a of the inner cylinder 10, and a connecting cam 13. A cam member 14 is provided at the rear end.

As shown in FIG. 3, the lock body 12 comprises an inner cylinder 10 and an outer cylinder 11, and a groove 15 is formed near the front of the inner cylinder 10. The groove 15 is formed at a constant depth along the outer circumference of the inner cylinder 10. In addition, outer cylinder 1
1 is provided with a rotation regulating pin 16 protruding into the groove 15. Therefore, when the normal key 18 is inserted into the key groove 17 of the inner cylinder 10 and turned by a predetermined angle, the rotation control pin 16 and the normal key 18 projecting from the groove 15 are rotated.
The rotation of the inner cylinder 10 is restricted by a part of.

The connecting cam 13 is provided on the inner cylinder 1 of the lock body 12.
The screw 19 is attached to the rear end 10a of the “0”. The connecting cam 13 has a concave portion 13a at one end for fitting with the inner end portion 10a of the inner cylinder 10, and a cam member 14 at the other end.
And a groove 13b is formed. An annular groove 21 in which the retaining pin 20 rotates is formed substantially in the center of the connecting cam 13. Further, the annular groove 21 forms an open groove 22 in communication with the groove 13b. A screw hole 23 for fixing is formed in the annular groove 21.
To FIG. 6).

The cam member 14, as shown in FIGS.
One end of the projection 24 inserted into the groove 13b of the connecting cam 13
And an operation shaft 25 for operating a cam or the like at the other end. The flange 26 serves as a stopper when inserted into the case body 27.

The case main body 27 has a cam member 14 at its rear end.
A protrusion hole 28 from which the operation shaft 25 projects, and a retaining pin 2
0 and the lock body 12
Is provided (see FIG. 1).

The lock body 12, the connecting cam 13, and the cam member 14 configured as described above are assembled in order as shown in FIG. First, after assembling the inner cylinder 10 and the outer cylinder 11, the tip of the rotation regulating pin 16 is suspended in the groove 15. The connecting cam 13 is fixed to the inner end 10 a of the lock body 12 with a screw 19. On the other hand, after assembling the retaining pin 20 at the back end of the case body 27, the cam member 14
Incorporate. Thereafter, the lock body 12 integrated with the connecting cam 13 is mounted on the case body 27 from the front. At this time, the connection cam 13 is set so that the opening groove 22 is positioned at the position of the retaining pin 20 of the case main body 27 by the detachable key 30.

Next, a method of using the lock unit replacement lock according to the present invention will be described. First, when locking / unlocking with the normal key 18, as shown in FIGS. 10 to 12, the key is inserted and the inner cylinder 10 is turned 90 degrees from the locked state of FIG. In this embodiment, when the inner cylinder 10 is turned 90 degrees with the normal key 18,
The rotation of the normal key 18 is regulated by the rotation regulating pin 16. In normal locking / unlocking, the cam member 14 drives a cam or the like (not shown) in the range of 90 degrees. In this state, the lock body 12 cannot be removed because the annular groove 21 of the connecting cam 13 is engaged with the retaining pin 20.

On the other hand, when replacing the lock, refer to FIGS.
As shown in FIG. 5, a detachable key 30 is used. Detachable key 30
Functions as a master key for the normal key 18 and has a regulating pin passage groove 30a. Therefore, turning the detachable key 30 from the locked state shown in FIG.
Unlock and turn to 180 degrees. At this time, since the rotation control pin 16 is avoided by the control pin passage groove 30a,
The rotation angle of the inner cylinder 10 is not limited to 90 degrees.

When the inner cylinder 10 is turned by 180 degrees by the attaching / detaching key 30, the connecting cam 13 is also turned by 180 degrees, so that the opening groove 22 projects from the case
The lock main body 12 can be extracted from the position 0.

When the lock body 12 is mounted, the connecting cam 13 is fixed to the inner end 10a of the new lock with screws 19, and then the inner cylinder 10 is turned 180 degrees by the detachable key 30 into the case body 27. insert. After insertion, attach / detach key 30
When the is turned to the locked position, the lock body 12 is engaged by the retaining pin 20 and cannot be removed. As described above, in the lock replacement lock of the present invention, the pin tumbler lock can be removed from the front and replaced.

Incidentally, the present invention is not limited to the above-described embodiment, and various design changes can be made based on the technical idea of the present invention.

[0019]

As described above in detail, according to the lock replacement lock according to the present invention, the lock is provided with an inner cylinder and an outer cylinder, and is attached to the inner end of the inner cylinder. A connection cam, a cam member inserted into the back end of the connection cam, a rotation regulating pin arranged from the outer cylinder toward the engagement groove of the inner cylinder, and a case body for storing the lock. A lock pin that stands up and prevents the lock from falling off, and is normally locked and unlocked within the range of the rotation restricting pin by a key, and is rotated beyond the range of the rotation restricting pin by an exchange key. Since the lock can be taken out, the lock can be removed from the front and replaced without opening the door of the locker or the like.

Since the lock is a pin tumbler lock in which the rotation of the inner cylinder and the outer cylinder is regulated by the pin tumbler, the number of key differences can be set more abundantly than in the conventional disk tumbler lock.

[Brief description of the drawings]

FIG. 1 is an enlarged vertical sectional view of a lock replacement lock according to an embodiment of the present invention.

FIG. 2 is an assembly view of a main part of the lock unit replacement lock.

FIG. 3 is a cross-sectional view of a main part showing a rotation regulating pin before the lock replacement lock.

FIG. 4 is a right side view of a connecting cam used before the lock replacement lock.

FIG. 5 is a front view of a connecting cam used before the lock replacement lock.

FIG. 6 is a longitudinal sectional view of a cam shaft used before the lock replacement lock.

FIG. 7 is a front view of a cam shaft used before the lock replacement lock.

FIG. 8 is a right side view of a cam shaft used before the lock replacement lock.

FIG. 9 is a left side view of a cam shaft used before the lock replacement lock.

FIG. 10 is a front view of a normal key used before the lock replacement lock.

FIG. 11 is an explanatory diagram showing a case where the lock unit replacement lock of the present invention is locked with a normal key.

FIG. 12 is an explanatory view showing a case where the lock unit replacement lock of the present invention is unlocked with a normal key.

FIG. 13 is a front view of a detachable key used before the lock replacement lock of the present invention.

FIG. 14 is an explanatory view showing a case where the lock unit replacement lock of the present invention is locked with a detachable key.

FIG. 15 is an explanatory view showing a case where the lock unit replacement lock of the present invention is unlocked with a detachable key.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Inner cylinder 10a Back end part 11 Outer cylinder 12 Lock body 13 Connecting cam 13a Depression 13b Groove 14 Cam member 15 Groove 16 Rotation control pin 17 Key groove 18 Normal key 19 Screw 20 Retaining pin 21 Ring groove 22 Open groove 23 Screw hole 24 Projection 25 Operation shaft 26 Flange 27 Case body 28 Projection hole 29 Pin hole 30 Detachable key 30a Restriction pin passage groove

Claims (3)

(57) [Claims] 1. A lock provided with an inner cylinder and an outer cylinder, a connection cam attached to a rear end of the inner cylinder, and a cam member inserted into the rear end of the connection cam. A rotation regulating pin disposed from the outer cylinder toward the engagement groove of the inner cylinder,
A lock pin which stands on the case body for storing the lock and prevents the lock from falling off.The lock is normally locked and unlocked within the range of the rotation restricting pin by a key, and the rotation restricting pin is locked by an exchange key. A lock replaceable lock characterized in that the lock can be taken out by rotating beyond the range of the pin. 2. The connecting cam has an annular groove for rotating the retaining pin and an open groove communicating with the annular groove.
2. The lock according to claim 1, wherein the lock is removable when the retaining pin is guided by the opening groove. 3. The lock unit replacement lock according to claim 1, wherein the lock is a pin tumbler lock in which rotation of an inner cylinder and an outer cylinder is regulated by a pin tumbler.