JPH0426031B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Technical Field> The present invention relates to a disk tumbler lock device comprising a lock and a key, which is applied to vending machines for various articles, automatic teller machines, exchange machines, etc.

<Background of the Invention> Conventionally, the lock in this type of locking device has a lock between the inner and outer cylinders.
It has a structure in which a clutch bar is provided to fix or release the inner cylinder from the outer cylinder, and a large number of disks are loaded into the inner cylinder. When each disk rotates by a set amount, the clutch bar comes off from the outer cylinder.
The inner cylinder rotates to lock and unlock. However, in conventional locks, a keyhole with a circular arc groove whose circular arc length differs from disk to disk is formed in the center of each disk, making it time-consuming to manufacture and assemble the disks. Since the clutch bar will come off when one end of the keyhole is aligned, there is a risk of picking by a wire, etc.

Therefore, the inventor previously formed a plurality of steps with different angles and heights according to the height of each key piece of the key on both sides of the hole periphery of the slit-shaped keyhole as each disk, and also formed a plurality of steps on the outer peripheral surface. proposed a disk tumbler lock using a concave portion into which a clutch bar engages (Japanese Patent Publication No. 11029/1983). This disk tumbler lock is suitable for mass production because the disk keyholes are the same and have a special shape, and is effective in preventing picking. It has been found that the method uses a return spring and a return spring, which is disadvantageous in that it requires a lot of effort to assemble.

<Objective of the Invention> The present invention provides a disk tumbler locking device that has an extremely simple configuration, omits a return disk and a coil spring, and can simplify assembly work and smooth operation.

<Configuration and Effects of the Invention> The present invention is a disk tumbler lock device consisting of a combination of a key and a lock, and the key includes key pieces of different heights formed at regular intervals on both sides of a flat plate. , the lock includes an outer cylinder, an inner cylinder with a front opening rotatably fitted into the outer cylinder, and a plurality of discs loaded into the inner cylinder at intervals of the key pieces via a retainer; It has a clutch bar that engages with the inner cylinder and engages with and disengages from a groove provided on the inner surface of the outer cylinder to restrict or allow rotation of the inner cylinder, and a disk return mechanism built into the inner cylinder. .

Each disk has a plurality of stepped portions having different heights formed on both sides of the periphery of the central keyhole in accordance with the height of each key piece of the key, and at different angular positions when viewed from the center of the keyhole. Approximately half of the outer circumferential surface is formed with a clutch bar engagement recess corresponding to the supporting surface of the clutch bar and a stepped portion that engages with one of the key pieces at a symmetrical position with respect to the center line of the supporting surface. A circular groove is formed on the half circumferential surface, leaving a protrusion in the center and extending on both sides of the protrusion. Further, each retainer has a protrusion and a circular groove formed on its outer circumferential surface that correspond to the protrusion and circular groove of each disk. Further, the disk return mechanism includes two return pins that pass through the circular grooves of each disk and each retainer, and the step portion engages with the highest key piece and rotates simultaneously with the key. , a cam whose groove bottom protrudes from the circular groove of the other disk at an end position near the protrusion of both circular grooves, and a recess in which each return pin can be engaged and detached is formed between the cam and the protrusion. In addition, a guide along the cam of the disk is formed at an end position of each retainer near the protrusion of the circular groove.

According to this invention, since the keyhole shapes of the plurality of disks incorporated in the lock are made to be the same shape, the manufacturing and assembly of the disks is simple, and the disk return mechanism is connected to the disk that rotates simultaneously with the key. Since it is constructed with a book return pin, the structure of the disk return mechanism is simple, and stable operation is realized without the need for a spring, which is a remarkable effect of achieving the object of the invention.

<Description of Embodiments> The disk tumbler lock device of the present invention has a first embodiment.
It consists of a combination of a lock having the structure shown in FIGS. 5 to 5 and a key having the structure shown in FIG.

The lock in the illustrated example includes an outer cylinder 1 with an open rear surface,
A circular keyhole 12 having a diameter matching the width of the key is provided in the face plate 11. A groove 13 in which a part of the clutch bar 3 engages is formed on the inner surface of the outer cylinder 1 along the cylinder axis, and a guard plate (not shown) and an inner cylinder are provided in the outer cylinder 1 as necessary. 2 is inserted. The inner tube 2 has a cylindrical shape with an open front surface, and a mounting shaft 21 is provided on the outer surface of the bottom to protrude from the outer tube 1, and a locking rod 22 is fixed to the shaft.
In the cylinder wall of the inner cylinder 2, there is a slit 23 having a slightly wider width and the same length than the groove 13 of the outer cylinder 1, corresponding to the groove 13 of the outer cylinder 1.
is formed, and a locking piece 61 of a retainer 6 disposed between the disks 4, which will be described later, is engaged with the slit 23. The locking piece 61 has a concave groove 1 in the outer cylinder 1.
A recess 62 having the same width as the clutch bar 3 and a depth corresponding to the shaft diameter of the clutch bar 3 is provided.
The clutch bar 3 is engaged and supported. The clutch bar 3 has a concave groove 13 in the outer cylinder 1 and each retainer 6.
It is a round shaft with a thickness that fits the recess 62 of the outer cylinder 1, and the half circumference of the shaft extends into and out of the recess 62 to form the recess 1 of the outer cylinder 1.
3 or each disk 4.

Inside the inner cylinder 2, a plurality of disks 4 are connected to a retainer 6.
are loaded at intervals between the key pieces 72 to 74 of the key 7, which will be described later. Each disk 4 has key pieces 72 to 72 on both sides of the periphery of the slit lock key hole 41.
A plurality of step portions 42, 4 having different heights according to 74
3 and 44 are formed at different angular positions when viewed from the center of the keyhole, and a support surface 45 for pushing up the clutch bar 3 is provided on the outer periphery of the disk 4 approximately on a half-circumferential surface. On the support surface 45 of each disk 4, there is a key piece 72, as shown in FIGS. 4A to 4C.
Bar engaging recesses 46, 46a for clockwise rotation and counterclockwise rotation are formed at predetermined angular positions corresponding to the step portions in engagement relationship with ~74, and are symmetrically positioned with respect to the center line of the bearing surface 45. Each recess 46, 46a is
When the disc 4 rotates the set amount, the slit 23
The clutch bar 3 is engaged with the clutch bar 3 at the position shown in FIG.

The other half of each disk 4 has a protrusion 4 in the center.
7, and the disk return pins 51 and 5 on both sides.
Circular grooves 48, 48a are formed in which the slider 1a slides. Among the plurality of disks 4, the disk 4a shown in FIG.
Cams 49, 49a having groove bottoms protruding from other disks 4 at end positions near the protrusion 47 of 8, 48a.
A recess 50, 50a is formed between each cam 49, 49a and the protrusion 47, and is continuous with the cam.
These recesses 50, 50a and the disk return pins 51, 51a constitute a disk return mechanism for clockwise rotation and counterclockwise rotation.

Each retainer 6 interposed between the disks 4 is for preventing adjacent disks from rotating together.
As shown in FIG. 5, a circular keyhole 68 with a diameter matching the key width is provided in the plane, and protrusions 67 are provided on the outer peripheral surface corresponding to the protrusions 47 of each disc 4, and discs are provided on both sides of the protrusion 67. Circular grooves 63 and 63a are provided corresponding to the circular grooves 48 and 48a of No. 4, respectively. The other peripheral surface of each retainer 5 has a slit 23 of the inner cylinder 2.
An engagement recess 62 of the clutch bar 3 is formed by providing a pair of locking pieces 61 that engage with the circular grooves 48, 48a, 6 of each disc 4 and each retainer 5.
3, 63a, the pins 51, 5 of the disk return mechanism
1a, and the pins 51, 51a are engaged with the recesses 50, 50a of the disk 4a.

Projections 67 of the circular grooves 63, 63a of each retainer 6
A guide 64 whose upper and lower groove edges are curved approximately along the cams 49, 49a is formed at an end position near the cams 49, 49a and the recesses 50, 50a of the disk 4a. .

According to the disk return mechanism configured as described above, for example, the recess 50a on the front side with respect to the rotation direction shown in FIG.
is engaged with the pin 51α, and the pin 51a is connected to the retainer 6.
and the other disks 4 along the circular grooves 48a, 63a, while the rear recess 50 is disengaged from the pin 51 and moves leaving the pin 51 behind.

The key 7 used in the above lock is as shown in FIG.
It has a pointed flat plate 71 at its tip that fits into the conical hole 24 on the bottom of the inner cylinder 2, and on both sides of the flat plate 71 there are keys having different heights depending on the thickness of the disk 4. Pieces 72, 73, 74 are formed.

In the locked state, as shown in FIGS. 1 and 2, the slit 23 of the inner cylinder 2 corresponds to the groove 13 of the outer cylinder 1, and the rotation of the inner cylinder 2 is prevented by the clutch bar 3. has been done. At this time, the engagement recess 46 of the clutch bar 3 of each disc 4, 4a,
46a are located in front and behind the clutch bar 3 by circumferential lengths corresponding to respective set rotation amounts. In this state, the bearing surface 45 of each disk 4 supports the clutch bar 3 and the locked state is maintained. Also, the keyhole 4 of each disk 4, 4a
1 match each other, and both pins 5 of the disk return mechanism
1 and 51a are located at the inner ends of the circular grooves 48 and 48a, and are pushed up by the guide 64 of the retainer 6 to correspond to the concave portions 50 and 50a of the disk 4a.

When unlocking the lock, insert the key 7 into the keyhole, engage the guide piece 71 at the tip with the conical hole 24, and then turn the key 7 clockwise. The disk 4a engaged with 72 is rotated at the same time. At this time, each of the middle and low key pieces 73 and 74
are idly spinning with respect to the corresponding disks 4, respectively. When the key 7 further rotates, the middle key piece 73 hooks the middle step part 43 of the corresponding disk 4 and rotates. At this time, the lower key piece 74 is still rotating idly relative to the corresponding disk 4. As the key continues to rotate, the lower key piece 74 touches the lower step 44 of the corresponding disk 4.
When hooking, each disc 4, 4a rotates at the same time, and the engagement recess 46a on the outer periphery of each disc 4, 4a
are aligned in a straight line. When the engagement recess 46a is located at the position of the slit 23 of the inner cylinder 2, the push-up of the clutch bar 3 is released and engaged therewith, thereby releasing the fixation of the inner cylinder 2 to the outer cylinder 1. Furthermore, key 7
When rotating, each disc 4, 4a and the inner cylinder 2 rotate together, and the locking rod 22 is unlocked.

When unlocking, one pin 5 of the disk return mechanism
1 is positioned on the guide 64 of the retainer 6 and moves relative to the circular groove 48 of each disk 4, 4a. The other pin 5a is connected to the recess 50a of the disk 4a.
The disk 4a is locked and rotates integrally with the disk 4a.

When the key 7 is rotated in the opposite direction to lock the lock again, the pin 51a is locked in the recess 50a of the disk 4a and moves backward together with the disk 4a, and each corresponding disk 4 is returned to its original state by hooking the protrusion 47. The clutch bar 3 faces the concave groove 13 of the outer cylinder 1, and the clutch bar 3 is further pushed out from the engagement concave portion 46 of the disks 4, 4a, and is brought into contact with the bearing surface 4.
5 is supported, the clutch bar 3 is again attached to the outer cylinder 1.
The inner cylinder 2 is engaged with the groove 13 of the inner cylinder 2, and the locking rod 22 is held in a locked state. Note that when the key 7 is rotated to the left, the disk 4 engages with a stepped portion that is symmetrical to the clockwise rotation, and one return pin 51a stops, and the other return pin 51 moves to perform the same operation as the clockwise rotation. Do this.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a lock in a disk tumbler locking device according to the present invention, and FIG.
Line sectional view, Figure 3 is a sectional view showing the operating status of the lock,
FIG. 4 is a front view of the disk, FIG. 5 is a front view of the retainer, and FIG. 6 is a front view of the key. 1... Outer cylinder, 2... Inner cylinder, 3... Clutch bar, 4, 4a... Disc, 41... Keyhole, 4
2, 43, 44...Stepped portion, 45...Supporting surface, 4
6, 46a...Engagement recess, 47...Protrusion, 47...
...Protrusion, 48, 48a...Curved groove, 49, 49a
... Recessed portion, 51, 51a ... Return pin, 6 ... Retainer, 63, 63a ... Circular groove, 7 ... Key, 7
2, 73, 74...Key piece.

Claims (1)

[Scope of Claims] 1. A disk tumbler lock device consisting of a combination of a key and a lock, wherein the key is provided with key pieces of different heights formed at regular intervals on both sides of a flat plate, and the lock is , an outer cylinder, an inner cylinder with a front opening that is rotatably fitted into the outer cylinder, a plurality of disks loaded into the inner cylinder via a retainer at intervals of the key pieces, and It has a clutch bar that engages with and disengages from a groove provided on the inner surface of the outer cylinder to restrict or permit rotation of the inner cylinder, and a disk return mechanism built into the inner cylinder. On both sides of the periphery of the keyhole, a plurality of steps with different heights are formed at different angular positions when viewed from the center of the keyhole, depending on the height of each key piece of the key, and approximately halfway around the outer peripheral surface. A clutch bar engagement recess is formed on the face at a symmetrical position with respect to the support surface of the clutch bar and the center line of the support surface, corresponding to a step that engages with one of the key pieces, and a center line is formed on the other half circumferential surface. A circular groove is formed leaving a protrusion on both sides of the retainer, and each retainer has a protrusion and a circular groove formed on its outer peripheral surface corresponding to the protrusion and the circular groove of each disk, and The mechanism includes two return pins that pass through the circular grooves of each disk and each retainer, and the disk whose stepped portion engages with the highest key piece and rotates simultaneously with the key has both circular grooves. A cam whose groove bottom protrudes from the circular groove of other disks at an end position near the protrusion of the groove, and a recess in which each return pin can be engaged and detached is formed between the cam and the protrusion, and each retainer A disc tumbler locking device comprising a guide along the cam of the disc formed at an end position near the protrusion of the circular groove.