JPH0316366Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field of the Invention> The present invention relates to a disk tumbler lock that is applied to various goods such as vending machines, game machines, automatic teller machines, exchange machines, and the like.

<Background of the invention> Conventionally, there are two types of disk tumbler locks: one in which the disk slides back and forth and the other in which the disk rotates. The reciprocating type tumbler lock has a plurality of discs arranged in the inner cylinder at equal intervals in the cylinder axis direction, and each disc has a key hole in its plane and an engaging protrusion at its end. The protrusions are engaged with the grooves of the outer cylinder, and when the key is inserted, the protrusions of each disk retract all at once, releasing the lock between the inner and outer cylinders.

However, if a member similar to a key is inserted into the keyhole and turned forcibly, the protrusion of such a lock will break, making it impossible to lock and unlock the lock smoothly thereafter.

A rotating tumbler lock has a clutch bar between the inner and outer cylinders, and a large number of disks loaded into the inner cylinder.When each disk is rotated by a set amount by key operation, the recesses on the outer circumference of the disks are aligned. A clutch bar engages with this, and the fixation between the inner and outer cylinders is released. However, a lock with such a structure has a disk.
A keyhole with an arcuate groove having a radius at the center is formed, and the arc length of this keyhole is different for each disc. Therefore, it takes time to manufacture and assemble the discs, and each disc has a different length. If one end of the keyhole is aligned, the clutch bar will come off, so there is a risk of picking with a wire or the like.

<Purpose of the invention> The object of the invention is to provide a novel disk tumbler lock which is a small lock, can set a huge number of different keys, and realizes highly accurate locking and unlocking operations.

<Configuration and Effects of the Invention> In order to achieve the above object, in the present invention, a clutch mechanism is provided between the inner and outer cylinders, a large number of disks are provided in the inner cylinder to slide in a direction orthogonal to the clutch mechanism, and a In addition to forming the engagement recess of the clutch mechanism, a plurality of disks are biased in one direction and a plurality of other discs are biased in the opposite direction, and a groove is formed on the side of the biasing side of the keyhole and on both end faces of the key. It has an actuating piece that projects inward and slides into engagement with a recessed actuating groove.

According to the above configuration, when each disk is slid by a set amount in a predetermined direction by inserting a key, the recesses on the upper side are aligned and receive the clutch mechanism, releasing the fixation between the inner and outer cylinders. Therefore, in the present invention, almost the entire length between the inner and outer cylinders is fixed or unfixed by a special clutch mechanism, and the movement is regulated by a large number of disks that reciprocate in the direction orthogonal to this clutch mechanism. Therefore, even if you insert a member of the same shape as the key into the keyhole and forcefully turn it, the clutch mechanism will not be destroyed. Moreover, when some of the multiple disks are moved in one direction and the other disks are moved in the opposite direction by a set amount, the recesses on the upper side of each disk align in a line, and the operation of the clutch mechanism is controlled. Therefore, in practice, it is impossible to move the disks stacked and aligned in the inner cylinder to the right or left by an external operation using a wire or the like, and thus picking can be completely prevented and automatic vending Demonstrates excellent effectiveness as a lock for machines, automatic teller machines, etc.

<Description of Examples> FIG. 1 shows a disc tumbler lock according to the present invention. The outer cylinder 1 of the tumbler lock has a cylindrical shape with an open rear surface, and the face plate 11 has a circular keyhole 12 that matches the width of the key, and a circular clutch groove 41 of the clutch mechanism is formed on the inner surface of the cylinder axis. A guard plate 2 and an inner cylinder 3 are fitted into the outer cylinder 1.

The guard plate 2 is rotatably interposed between the end surface of the inner cylinder 3 and the inner surface of the face plate 11, and a slit-shaped key insertion hole 21 corresponding to the key width and key thickness is provided in the surface. The plate 2 is made sufficiently hard by hardening treatment or the like.

As shown in FIGS. 2 and 4, the inner cylinder 3 is provided with a disk loading part 31 that extends along the cylinder axis and communicates in the diametrical direction, a clutch mechanism loading part 32 that communicates orthogonally with the loading part 31, and a bottom. Mounting shaft 3 on the wall
A clutch mechanism 4 is provided in the clutch mechanism loading section 32, and a large number of disks 5 and a retainer are stacked in the direction of the cylinder axis in the disk loading section 31. 50 are loaded alternately, and a clutch mechanism 4 is loaded into the inner cylinder 3.
A sheath body 35 in which an engagement slit 36 is formed corresponding to the
is fitted to close both openings of the disk loading section 31.

The clutch mechanism 4 is arranged to engage with a clutch groove 41 formed on the inner surface of the outer cylinder 1 and the loading portion 32, and a part of the shaft peripheral surface protrudes and retracts from the cylinder periphery to engage and disengage from the clutch groove 41. Clutch shaft 42 with circular cross section
and a clutch bar 43 that freely supports the inner shaft periphery of the clutch shaft 42 and engages and disengages the clutch shaft 42 at right angles to the sides in the sliding direction of each disk 5. A clutch portion 46 having a serrated uneven surface 45 on the other side is formed and is disposed perpendicularly to each disk 5, and play disks 6, 6 disposed at both ends of the laminated disk 5. Coil spring 61 between
61 is interposed to bias the clutch shaft 42 in the direction in which it emerges from the loading section 32.

Each of the disks 5 is arranged so as to be slidable in a direction perpendicular to the direction in which the clutch mechanism 4 engages and disengages, that is, the direction in which the clutch shaft 42 engages and disengages. Sawtooth-like uneven portions 52 symmetrical to the uneven surface 45 of the clutch bar 43 are formed on both sides of the clutch bar 43 . One or more disks 5a out of the large number of disks 5 are moved in one direction, and the other plurality of disks 5b are moved in the opposite direction by springs 53 and 5.
At the same time, the spring-side side of the key hole 55 is provided with actuating pieces 56 and 57 that protrude inwardly to engage and slide into actuating grooves formed in both end faces of the key, which will be described later. It is set up.

FIG. 11 shows a key used in the lock of the present invention, and the key is activated by engaging and sliding actuating pieces 56 and 57 provided on the disk 5 on both end surfaces along the longitudinal direction of the plate-shaped key piece 7. Grooves 71 and 72 are recessed, and the operating groove 7
1 and 72 are formed in an inclined or wavy manner along the longitudinal direction, and have different depths. Therefore, each disk 5
When the key is inserted to the specified position, the recess 43 of
The operating pieces 53, 54 and the corresponding operating grooves 71,
The position is determined in relation to 72.

Incidentally, the springs 53 and 54 that urge the disk 5 may be interposed between the disk 5 and the retainer 50, and in this case, the sheath body 35 can be omitted. Furthermore, in implementation, one or more center disks 5e are incorporated into the multiple disks 5 to increase the number of different keys. As shown in FIG. 10, the center disk 5e has a concave portion 51 and concave and convex portions 52 formed on both sides of the concave portion 51 on the upper side of the disk, similar to the disk 5, and has an operating piece 58 protruding from the upper side of the keyhole 55. On the other hand, on the surface of the key piece 7, an actuation groove 73, such as a waveform, a straight line, or an inclined actuation groove, which engages and slides with respect to the actuation piece 58 is formed. Therefore, the recess 51 of the center disk 5c
In its arrangement, the actuating piece 58 and the actuating groove 73
Of course, the position is determined in relation to the

However, in the locked state, as shown in FIGS. 1 and 2, part of the shaft circumference of the clutch shaft 42 touches the outer cylinder 1.
, and the clutch shaft 42 is engaged with the clutch groove 41 of the clutch shaft 42 .
are located perpendicularly to the sides of a large number of disks 5 in the inner cylinder 3 via the clutch bar 43, and at this time,
The clutch recesses 51 of each disk 5 are shifted from each other and maintain a locked state. Now, when inserting the key piece 7 for unlocking, the actuating pieces 54 and 53 of each disk 5 sequentially engage with the actuating grooves 72 and 71,
When the operating grooves 72 and 71 are inserted into the operating grooves 72 and 71 and the key reaches the insertion end, the clutch recesses 51 of each disk 5 are aligned in a line corresponding to the clutch bar 43, and the clutch bar 43 is engaged. It will be in a waiting state. Next, by key operation, disk 5,
When applying a rotational force to the inner cylinder 3 including the clutch mechanism 4, the clutch shaft 42 uses the clutch groove 41 of the outer cylinder 1 as a support point to support the clutch bar 43 with the spring 6.
1, 61 and press down against the elasticity of clutch bar 4.
3 engages with the clutch recess 51 of the corresponding disc 5 to retract the clutch shaft 42 into the cylinder 3, and when the key piece 7 is turned in this state, the disc 5 and the inner cylinder 3 including the clutch mechanism 4 are integrated. The lock lever 34 is rotated to lock and unlock the lock rod 34.

Note that when the disc 5 is misaligned with respect to the clutch bar 43, the end of the uneven surface 45 of the clutch bar 43 engages with the uneven part 52 of the disc 5, and the engagement between the operating grooves 71, 72 and the operating pieces 56, 57 is caused. Due to the engagement relationship, the clutch bar 43 is prevented from lowering.
Therefore, all of the multiple disks 5 are in the operating grooves 71, 7.
2, when the clutch bar 43 is positioned at a predetermined position, the clutch bar 43 is activated to improve the accuracy of the operation.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the disc tumbler lock according to the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, Fig. 3 is a sectional view showing the operating situation of Fig. 2, and Fig. 4 is a sectional view taken along line A-A in Fig. 1. The figure is a perspective view of the inner cylinder, Figure 5 is a plan view showing the relationship between the tumbler group and the key, Figure 6 is a sectional view taken along line B-B in Figure 5, Figure 7 is a sectional view taken along line C-C, Figure 8 is a front view of the disk, Figure 9 is a front view of the retainer,
Figure 0 is a front view of the center disk, and Figure 11 is a plan view of the key. DESCRIPTION OF SYMBOLS 1... Outer cylinder, 3... Inner cylinder, 4... Clutch mechanism, 5... Disc, 51... Recess, 55... Keyhole, 56, 57... Actuation piece.

Claims (1)

[Scope of utility model registration request] The lock is equipped with a clutch mechanism 4 between an inner cylinder 3 and an outer cylinder 1, and a number of discs 5 that engage and release the clutch mechanism by inserting a key into the inner cylinder 3. Each disc 5 has a clutch mechanism on its upper side. It is provided with a recess 51 for engaging and disengaging and a keyhole 55 in the plane, and is arranged so as to be slidable in a direction perpendicular to the engaging and disengaging direction of the clutch mechanism,
A plurality of discs 5 apply spring force in one direction, and a plurality of other discs 5 apply a spring force in the opposite direction, and the keyhole 55
A disc tumbler lock having actuating pieces 56 and 57 that protrude inwardly from the side on the spring force biasing side, respectively, to engage and slide into actuating grooves recessed on both end faces of the key.