JPH0658074U - Cylinder lock - Google Patents

Abstract

(57) [Summary] [Purpose] The intentional removal of the inner cylinder is prevented, and the mechanism for extracting the inner cylinder is simplified. A cylinder lock having an outer cylinder 1 and an inner cylinder 2 rotatably and slidably attached to the outer cylinder 1 and having a key hole 22 in the axial direction of the inner cylinder 2 is provided. The annular or arcuate locking groove 1 concentric with the outer circumference of the inner cylinder 2 along the inner circumference of the
2 is provided, and the locking groove 1 is provided on the inner surface of the outer cylinder 1 in the axial direction.
2 is provided with a slip-off groove 13 and a locking piece 7 is mounted in a mounting hole 24 provided in the inner cylinder 2 in a substantially diametrical direction. The locking piece 7 is in a normal state and one end 71 of the locking piece 7 is locked to the outer cylinder 1. The other end 72 of the locking piece 7 is biased so as to project into the groove 12, and the other end 72 of the locking piece 7 is inserted into the inner cylinder 2 of one end 71 of the locking piece 7 only when the inner cylinder replacement key 30 is inserted into the key hole 22. It is configured to project into the locking groove 12 as the No. 2 enters and to be pulled out through the removal groove 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cylinder lock in which only the inner cylinder can be easily replaced for the purpose of changing the key code when the lock needs to be replaced due to loss of the key or the like. Examples of cylinder locks to which the present invention can be applied include disk tumbler locks, pin tumbler locks, magnetic pin tumbler locks, and lever tumbler locks.

[0002]

[Prior art]

 If the key of the cylinder lock is lost, or if the user of the locker changes at a golf course, school, etc., replace only the inner cylinder without changing the entire cylinder lock, and change the key code accordingly. Sometimes.

[0003] Examples of cylinder locks in which the inner cylinder can be replaced include those disclosed in Japanese Utility Model Laid-Open No. 63-177568 or Japanese Patent Laid-Open No. 3-147988.

However, in the former cylinder lock, since the inner cylinder can be pulled out by a key that is normally used, there is a risk that the inner cylinder is intentionally pulled out by mischief, and in the latter cylinder lock, the inner cylinder can be pulled out. Although the inner cylinder can be pulled out only by the key for cylinder replacement, there are some drawbacks such as the mechanism for extracting the inner cylinder is complicated and the number of parts is large.

[0005]

[Problems to be solved by the device]

 The cylinder lock of the present invention is proposed in order to prevent the intentional extraction of the inner cylinder and to simplify the mechanism for extracting the inner cylinder.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, a cylinder lock of the present invention comprises an outer cylinder and an inner cylinder rotatably and slidably mounted on the outer cylinder, and a lock provided with a key hole in the axial direction of the inner cylinder. In the linder lock, an annular or arcuate locking groove concentric with the outer circumference of the inner cylinder is provided along the inner circumference of the outer cylinder, and a slip-out groove communicating with the locking groove is provided on the inner surface of the outer cylinder in the axial direction. A locking piece is attached to the mounting hole provided in the inner cylinder in a substantially diametrical direction, and the locking piece is normally urged so that one end of the locking piece projects into the locking groove of the outer cylinder, and the locking piece is locked. The other end of the piece protrudes into the locking groove as one end of the locking piece goes into the inner cylinder only when the inner cylinder replacement key is inserted into the key hole, and can be pulled out through the removal groove. It is characterized by having done.

[0007]

[Action]

 In the cylinder lock of the present invention having the above structure, the locking piece inserted into the mounting hole of the inner cylinder is always engaged with the locking groove provided in the outer cylinder unless the inner cylinder replacement key is inserted into the key hole. Therefore, the inner cylinder is prevented from sliding in the axial direction, that is, being pulled out.

When the normal locking / unlocking key is inserted, the inner cylinder is still prevented from sliding in the axial direction by the locking piece, but when the locking / unlocking key is turned, the locking piece is moved to the outer cylinder. Since it is released along the locking groove of, the inner cylinder rotates a required angle and exhibits a locking or unlocking action.

An inner cylinder replacement key is used to pull out the locking piece through the removal groove communicating with the locking groove. When the inner cylinder replacement key is inserted into the key hole of the inner cylinder, one end of the locking piece is retracted, and the other end of the width that can be inserted into the slip-out groove protrudes from the inner cylinder, and the inner cylinder is rotated by a predetermined angle. The other end of the locking piece can be pulled out from the removal groove.

Here, the inner cylinder can be pulled out from the outer cylinder, and can be replaced with an inner cylinder having a different key code.

[0011]

【Example】

 The cylinder lock of the present invention will be described below with reference to the embodiments shown in the drawings. The cylinder lock shown in the drawing is a disk tumbler lock, but the present invention can also be applied to various cylinder locks such as a pin tumbler lock, a magnet type pin tabler lock or a lever tumbler lock.

In FIGS. 1 and 2, reference numeral 1 is an outer cylinder, 2 is an inner cylinder rotatably and slidably mounted on the outer cylinder 1, and 21 is a flange portion that prevents the inner cylinder 2 from coming out backward. , 22 are key holes projecting in the axial direction of the inner cylinder 2, 3 are latch members detachably attached to the rear end of the inner cylinder 2 with square holes 31, and 4 are external cylinders with screws not shown. A holding plate 5 for the hooking member 3 fixed to the rear end of the disk 1 is housed in an arbitrary number of housing holes 23 of the inner cylinder 2 and is unidirectionally urged by a compression spring (not shown), 6 Is a shear line between the outer cylinder 1 and the inner cylinder 2, and 11 is a retaining groove for an arbitrary number (four in the figure) of disks 5 provided in the outer cylinder 1.

The latching member 3 is directly engaged with the fixed-side frame portion with which the door fits, but instead of this, it may be an operating member that operates a separately provided locking mechanism. . As means for attaching the hooking member 3 or the action member to the inner cylinder 2, any means such as simply screwing the inner member 2 to the inner cylinder 2 may be adopted.

Further, in place of the hooking member 3 and the acting member, a switch of a locking mechanism electrically operated at the rear end portion of the inner cylinder 2 may be operated. The above configuration is well known in the art.

Next, a main part of the present invention will be described. In this invention, an annular or arcuate locking groove 12 is provided along the inner circumference of the outer cylinder 1 so as to be concentric with the outer circumference of the inner cylinder 2, and the locking is provided on the inner surface of the outer cylinder 1 in the axial direction. An escape groove 13 that communicates with the groove 12 is provided.

In the disc tumbler lock of the illustrated example, the escape groove 13 uses one of the above-mentioned stop grooves 11. In other words, although the escape groove 13 is also used as one of the stop grooves 11, it may be provided separately. Since the pin tumbler lock and the magnet type pin tumbler lock do not usually have a stop groove, the escape groove 13 must be provided.

On the other hand, a mounting hole 24 is provided in a portion of the inner cylinder 2 corresponding to the locking groove 12 of the outer cylinder 1 in a substantially diametrical direction on the transverse surface of the inner cylinder 2. And, as shown in FIG. 7, for example, a locking piece 7 having a shape substantially similar to that of the above-mentioned disk 5 is mounted, and the locking piece 7 is locked by a compression spring 8 or a magnetic force inserted into the mounting hole 24. Normally, the one end 71 is urged so as to project into the locking groove 12 of the outer cylinder 1.

The fact that the locking piece 7 has a shape similar to that of the disk 5 is for manufacturing advantage, but even if the locking piece 7 is formed in any other shape, for example, a pin shape. Not to mention the good news.

In the illustrated example, the locking piece 7 is provided at the rearmost portion of the outer cylinder 1 and the inner cylinder 2 for the purpose of avoiding picking, but it may be provided on the front side of the inner and outer cylinders 1, 2.

In the cylinder lock having such a configuration, the inner cylinder exchange key 30 shown in FIG. 8 and the locking / unlocking key 40 shown in FIG. 9 are prepared.

At the time of normal locking / unlocking shown in FIG. 3, the disk 5 is housed in the shear line 6, that is, the inner cylinder 2 by inserting the key 40 into the key hole 22, so that the inner cylinder 2 is placed outside. It becomes rotatable with respect to the cylinder 1, and exhibits a locking / unlocking action. At this time, one end 71 of the locking piece 7 projects into the locking groove 12 of the outer cylinder 1, but since the locking groove 12 is formed concentrically with the outer circumference of the inner cylinder 2, There is no interference with the rotation of the and the normal locking and unlocking operation is performed.

When replacing the inner cylinder shown in FIGS. 4, 5, 6 and 7, the disk 5 is inserted into the shear line 6, that is, the inner cylinder 2 by inserting the inner cylinder exchange key 30 into the key hole 22. The wide end 71 of the locking piece 7 is housed in the inner cylinder 2, and at the same time, the narrow second end 72 projects into the locking groove 12.

Therefore, the inner cylinder 2 becomes rotatable, and when the narrow end 72 of the locking piece 7 moves from the position of FIG. 6 to the position of FIG. 7 by turning the key 30, it is shown in FIG. As described above, the other end 72 can be pulled out to the outside through the removal groove 13 which also serves as the stop groove 11 communicating with the locking groove 12.

Here, the inner cylinder 2 can be replaced. When replacing the inner cylinder 2 with a different key code, by replacing part or all of the disk 5 of the inner cylinder 2 that was being used, the inner cylinder 2 itself is reused and only the key code is changed. Of course it is okay.

[0025]

[Effect of device]

 According to the cylinder lock of the present invention described above, the structure for replacing the inner cylinder is simple, and even though the number of parts is small, there is an advantage that intentional removal of the inner cylinder can be prevented. At least one end of the locking piece for locking the inner cylinder to the outer cylinder protrudes into the locking groove of the outer cylinder, either in the normal state or when the inner cylinder is replaced. The inner cylinder will be more reliably prevented from being pulled out by picking.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a cylinder lock of the present invention.

FIG. 2 is a cross-sectional view taken along line II-II of FIG.

FIG. 3 is a vertical cross-sectional side view of the locking / unlocking key inserted.

FIG. 4 is a vertical cross-sectional side view of the inner cylinder replacement key when inserted.

FIG. 5 is a vertical cross-sectional side view showing a state where the inner cylinder is pulled out.

6 is a cross-sectional view taken along line VI-VI in FIG.

7 is a cross-sectional view taken along the line VII-VII in FIG.

FIG. 8 is a side view showing an example of an inner cylinder exchange key.

FIG. 9 is a side view showing an example of a locking / unlocking key.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 outer cylinder 12 locking groove 13 slip-out groove 2 inner cylinder 22 key hole 24 mounting hole 7 locking piece 71 one end 72 the other end 30 inner cylinder replacement key 40 locking / unlocking key

Claims (4)

[Scope of utility model registration request] 1. A cylinder lock having an outer cylinder and an inner cylinder rotatably and slidably mounted on the outer cylinder, wherein a key hole is provided in the axial direction of the inner cylinder, the cylinder lock extending along the inner circumference of the outer cylinder. With an annular or arcuate locking groove that is concentric with the outer circumference of the inner cylinder,
A groove is formed on the inner surface of the outer cylinder in the axial direction that communicates with the locking groove, and a locking piece is installed in the mounting hole that is provided almost in the diametrical direction of the inner cylinder. The other end of the locking piece is locked as the one end of the locking piece goes into the inner cylinder only when the inner cylinder replacement key is inserted into the key hole. A cylinder lock characterized in that it protrudes into the groove and can be pulled out through the groove. 2. The cylinder lock according to claim 1, wherein the cylinder lock is a disk tumbler lock. 3. The cylinder lock according to claim 2, wherein the cylinder lock is a disk tumbler lock and the locking piece is disk-shaped. 4. The cylinder lock according to claim 2 or 3, wherein a stop groove of a disk tumbler lock is also used as the escape groove.