JP3002994B2 - Disc tumbler tablets - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a novel disk tumbler that can completely prevent picking and can easily set a large number of master keys and grand master keys.

<Conventional technology and its problems> Disc tumbler locks have been manufactured in various products from the past, and the manufacturing process is simpler than pin tumbler locks. Widely used.

Usually, a disk tumbler lock includes an outer cylinder and an inner cylinder rotatably housed in the outer cylinder. The inner cylinder accommodates a disk urged by a spring so as to protrude in the outer cylinder direction, Part of the disc is inserted into the hole formed in the outer cylinder, and only when the correct key is inserted into the keyhole of the inner cylinder, the disc is moved properly and the inner The inner cylinder is moved to the inside of the cylinder and the inner cylinder and the outer cylinder are fixed by the disk, so that the inner cylinder can be freely rotated with respect to the outer cylinder. To perform a locking or unlocking operation.

Generally, these disk tumbler locks reduce the number of types of disks to be inserted into the same lock cylinder and increase the number of types to be inserted in order to facilitate manufacture,
The number of key differences is secured.

In order to obtain more key differences, it is necessary to increase the number of discs to be inserted into the lock cylinder as described above. When setting a master key, it is basically required that there be many key differences. However, when seeking perfection as a key, the lock cylinder was inevitably too long, resulting in unsatisfactory results.

<Problems to be Solved by the Invention> The problems of the disk tumbler lock are that it is difficult to increase the number of key differences and that the range for assembling the master key is limited, as described above. Are known.

As a means for obtaining a master key, a method is generally adopted in which a required number of disks set in a lock cylinder are extracted and used as a cylinder for a change key.

To specifically explain such an example, three types of discs are temporarily inserted, a cylinder is constituted by six discs, and (1) a combination of 3 2 1 2 3 1 discs is defined as a master key. Disk combination.

In contrast, the change key cylinder is configured such that one of the six cylinders is removed, and (2) * 2 1 2 3 1 (3) 3 * 1 2 3 1 (4) 3 2 * 2 3 1 (5) 3 2 1 * 3 1 (6) 3 2 1 2 * 1 (7) 3 2 1 2 3 * is a disk configuration of a change key with respect to the master key. The disc is pulled out of the part marked *,
The corresponding key mountain is not engraved.

Since the master key is engraved with a key ridge corresponding to the disk of [321231], the combination of all the above disks can be appropriately moved and unlocked.

However, the change key can only unlock one corresponding cylinder, but cannot unlock the other cylinders, thereby establishing the relationship between the master key and the change key.

However, in this format in which the key is not engraved on the change key and the master key is secured, if multiple change keys are obtained, they are considered together and the key engraving of the master key is analogized. The security effect may be impaired regardless of the accuracy of the lock, and at the same time, the operation of reducing the number of disks to secure the master key will deteriorate the resistance to picking. Problems arise.

Regarding that point, the situation is exactly the same in a general pin tumbler lock that secures the master key by inserting the master pin, and it is also possible to analogize the master key from multiple change keys, There is a danger that the picking resistance will be degraded in all the master keys that can be used.

In the present invention, it is intended to provide advantages such as high precision, large number of key differences, mass productivity, ease of assembling a master key, complete prevention of picking, and the like to a disk tumbler lock that is easy to manufacture. At the same time, it is an object of the present invention to provide a disk tumbler lock with improved picking resistance, eliminating the danger of analogizing a master key from a change key.

<Means for Solving the Problems> The conventional disk tumbler lock uses the disk directly for locking between the inner cylinder and the outer cylinder, and moves the disks to an appropriate position. Was used.

For this reason, the number of key differences is limited by the type of disc inserted and the number of discs inserted. As a general household lock, about six discs are inserted into one lock cylinder, and Usually, there were about three types of disks.

The theoretical value of the key difference obtained in such a product is about 700 ways, and hereafter, when the number of disks is increased, the key difference is about 7 disks 2100 ways Disk 8 about 6500 ways 9 disks About 19,000 streets 10 discs About 59,000 streets.

Increasing the number of disks increases the number of key differences and makes the situation desirable, but for that purpose, a long lock cylinder must be used, and a practical lock cannot be obtained.

Further, in the conventional product, since the disc is used for fixing the inner cylinder and the outer cylinder, the rotation given to the inner cylinder without inserting an appropriate key is necessary and sufficient for picking the disc. Pressure.

In the present invention, the disk is moved by the pile of keys, and the form in which the disk is directly fixed between the inner and outer cylinders is abandoned, and a separate fixing means is provided for fixing between the inner and outer cylinders. I made it.

In addition, several kinds of recesses are formed in the side surface of the disc (see FIG. 6).
(See FIG. 5), the discs are set in pairs with the recesses facing outward (see FIG. 5), and a plurality of these sets are aligned in the axial direction of the inner cylinder (see FIG. 3).

The fixing means between the inner cylinder and the outer cylinder is accommodated in the inner cylinder, and the fixing projection is fitted in the lock groove of the outer cylinder, and the fixing projection is accommodated in the inner cylinder by a spring. Between the fixing means and the disc, a side bar as a detection means which fits into all the recesses when the recesses on the side faces of the disc are correctly aligned (see FIG. 7);
A ball as a transmission means that always contacts both the side bar and the fixing means is installed.

According to this, when even one of the recesses on the side of the disk is outside the alignment position, the side bar does not fit, and the ball in contact therewith keeps pushing up the fixing means. Cannot escape from lock groove of outer cylinder. Therefore, the lock is maintained.

When the recesses on the side of the disk are properly aligned as shown in FIG. 7 by using an appropriate key, the side bar falls into the aligned recess, and there is a margin between the ball and the fixing means. As a result, the fixing projection is pulled out of the lock groove of the outer cylinder and unlocking is performed.

For example, even if the recess is formed only at one location on the side of the disk, if the change of the drilling position is set in three stages,
With this alone, three types similar to the conventional disc can be obtained. If two such recesses are formed in one disc, the number of key differences is doubled by itself (see FIG. 6). It is clear that the number of key differences from the conventional product is different from this alone, but as a product that is actually possible, the recesses on the side of the disk are drilled at two places as described above, Since nine rows (18) can be used as a set (see FIG. 5), it is no exaggeration to say that the number of key differences is almost infinite in actual use.

If two recesses are perforated in a single disc, and a plurality of the recesses are aligned and used as a set of two discs, one of the two locations is required to appropriately move each disc. If you use one of the four recesses of a set of left and right discs and one of the top and bottom of the right, you will use other recesses. The lock can be operated without having to do it.

When used in this way, the combination of the locations of the depressions is one of the four combinations shown in FIGS.

The symbols attached to these drawings indicate the position of the recess, where LU is the recess above the left disk LL is the recess below the left disk RU is the recess above the right disk RL is the recess below the right disk Each means concave.

As is apparent from the drawings, the combinations of depressions to be used are LU-RU (FIG. 8), LL-RU (FIG. 9), LL-RU.
RL (FIG. 10) and LU-RL (FIG. 11).

Since four means for operating a single lock are provided in this way, using three of them, (A) operation of the grand master key (B) operation of the master key ( C) It is very easy to operate the change keys independently of each other.

For example, considering the master key in a typical hotel, very simply assuming the situation: (A) Grand Master Key A single key that can lock and unlock all rooms in a hotel.

(B) Master key A single key that can lock and unlock all guest rooms on one floor. One key is required for each floor.

(C) Change key A key that locks and unlocks only one room.

It is assumed that three types of keys are required at a minimum.

To cope with these with the lock according to the present invention, (A) Use [LU-RU] shown in FIG.
A key that can properly align all of the recesses is a grand master key.

(B) [RU-LU] shown in FIG. 9 is used, and [LL] is common to one floor. Since [RU] is set in common to all rooms as described above, if a key that can properly align all the recesses of this [RU-LL] is a master key, that key can be used for all floors on one floor. The guest room can be locked and unlocked.

(C) When [LL-RL] shown in FIG. 10 is used and [RL] is made different for each floor, and one combination of [RL] is made to correspond to one guest room, LL-R
L] is a change key that can lock and unlock only a single room in all the guest rooms of a hotel.

Even if the grand master key, the master key and the change key are set in this manner, in the case of the disk tumbler lock according to the present invention, another set of lock operation means [LU-RL shown in FIG. ] Are left untouched, and separate settings have enough available capacity.

In other words, in the present invention, four rows of discs are installed in one lock cylinder (inner cylinder and outer cylinder). It can be said that this is a new disk tumbler lock that only requires two rows to operate. In this case, the remaining two rows of unused disks
It does not hinder the operation of the lock, which is completely different from a lock that simply has four rows of disks.

<Operation> According to the present invention, one key having two rows of left and right key pits is used, and the upper and lower recesses of the left and right disk rows are aligned in one row, so that the left and right recesses are aligned in the aligned recesses. Locking and unlocking are performed by fitting the respective side bars and utilizing the gap generated by the movement of the side bars to invalidate the fixing means for mutually fixing the inner and outer cylinders.

<Example> A specific example of the present invention will be described with reference to the drawings.

FIG. 3 is an exploded perspective view of the disk tumbler lock of the present invention. In the drawing, 1 is a key, 2 is a decorative cover for accommodating all parts, 3 is an outer cylinder having a lock groove 4, 5 is a decorative head which also serves as a guide when inserting the key 1, 6a and 6b are An inner cylinder sleeve for covering the inner cylinder 10, a cam 7 fixed to the inner cylinder 10, a pressing plate 8 for pressing all components into the outer cylinder 3, and a reference numeral 9 for the inner cylinder 10 with respect to the outer cylinder 3. While ensuring rotation,
This is a fixing ring for putting the whole into one lock.

Further, reference numeral 11 denotes a disk into which the inner cylinder 10 is to be inserted, and 12 denotes a spring for urging the disk 11 in a predetermined direction in the inner cylinder.

The components housed inside the inner cylinder are as shown in the enlarged exploded perspective view of FIG.

In FIG. 4, a keyhole 13 is formed at the center of the end face of the inner cylinder 10, and a required number of disc holes 14 are formed so as to intersect the keyhole 13 at right angles from the peripheral surface of the inner cylinder 10. Has been established. The disk 11 and the spring 12 described above are inserted into the disk hole 14.

From the side surface of the disc hole 14 toward the peripheral surface of the inner cylinder 10,
An opening 15 is bored, inside which side bars 16 and 16 are installed in contact with the disc 11, and side bars 16 and 16 are provided.
The balls 17, 17 are mounted in contact with 16.

Reference numeral 18 denotes fixing means for fixing the inner cylinder 10 and the outer cylinder 3 to each other, and a fixing projection 19 is provided at the outer end thereof.
Subsequently, the escape prevention edge 20 and the protrusion 21 are provided. Both ends of the escape-preventing edge 20 and the projecting portion 21 are slightly shorter than the fixing projections 19, and the balls 17 are accommodated in portions where the fixing projections 19 project from other portions. .

These parts, sidebar 16, ball 17, fixing means 18
And the fixing projections 19 work together as control means.

22 is a spring whose center is suspended by the fixing means 18,
Both ends are in contact with the inner surfaces of the inner cylinder sleeves 6a and 6b, and serve to urge the fixing means 18 to be drawn into the opening 15. Inner cylinder sleeps 6a and 6b are splitters,
The inner cylinder 10 can be fitted from both ends thereof, and a hole 23 is formed in the peripheral surface thereof so that the fixing projection 19 can enter and exit.

After inserting the disk 11 and the spring 12 into the inner cylinder 10 and further incorporating the components shown in FIG. 4, the inner cylinder 10 is covered with the inner cylinder sleeps 6a and 6b, and the periphery of the keyhole 13 of the inner cylinder 10 is With the makeup head 5 fixed, the cam 7 and the presser plate 8 are attached to the opposite ends,
The whole is inserted into the outer cylinder 4, and components related to the inner cylinder 10 are fixed to the outer cylinder 4 by a fixing ring 9 so as to be rotatable and unable to escape.
Finally, the decorative cover 2 is attached to the outer cylinder 4 to complete the lock.

As shown in FIG. 6, the disk 11 has recesses 24 on the side surface, and the opposite side surface is cut to a predetermined size to form a key receiving portion 25 which comes into contact with the key of the key 1. .

In the present embodiment, such a disk 11 is
As shown in FIG. 5, two discs are paired so that 24 faces outward, and nine discs are inserted into the inner cylinder 6 to use a total of 18 discs.

For the sake of simplicity, the cross-section of the set of disks 11 is shown in FIGS.
Only that part is explained.

FIG. 1 shows the component arrangement state when the unlocking is not performed, and FIG. 2 shows the component arrangement state when the unlocking is performed.

In FIG. 1, the disk 11 is pushed down in the figure under the action of the spring 12, and none of the side bars 16 is pushed out of the disk hole 14 without fitting into the recess 24 of the disk 11. Therefore, the side bar 16 pushes the ball 17 outward in the figure, and the ball 17 pushes the fixing means 18 toward the outer cylinder 3 against the action of the spring 22 (not shown). As a result, the fixing projection 19 is
And the inner cylinder 10 and the inner cylinder sleeve 6a are prevented from rotating with respect to the outer cylinder 3.

FIG. 2 shows a state in which an appropriate key is inserted into the lock in this state.

The key 1 pushes up the disk 11 and moves the lower recess 24 to an appropriate position.
The side bar 16 partially moves into the disc hole 14. As a result, the ball 17 moves in the direction approaching the disk 11, so that there is a margin between the ball 17 and the fixing means 18, and the fixing means 18 is also moved by the action of the spring 22 (not shown). The inner cylinder 10 and the inner cylinder sleep 6a are in a state where they can freely rotate with respect to the outer cylinder, because the inner cylinder 10 and the inner cylinder sleep 6a move in a direction approaching the outer cylinder 11 and the fixing projection 19 escapes from the lock groove 4 of the outer cylinder 3. Will be gained. In practice, such a set of discs 11 are inserted in nine rows in one lock, but unless all the recesses 24 of the discs 11 are properly aligned as shown in FIG. The bar 16 will not fit in the position of FIG.

In the thus-installed lock of the present invention, unlocking can be performed if one side bar 16 on each of the left and right is fitted into the recess 24 regardless of whether it is up or down.

Therefore, the combination of the insertion positions of the side bars 16 on the left and right disks 11 is as follows: left upper concave LU− right upper concave RU left upper concave LU− right lower concave RL left lower concave LL− right upper concave RU left lower concave LL− right There are four types of depressions RL, and a large number of key differences can be easily created, and the setting of a master key is also easy.

Further, in the present embodiment, an example is shown in which two recesses 24 are perforated in one disk 11, but the number of the recesses 24 is optional if necessary in design.

In the embodiment, the case where two rows of discs are inserted into the inner cylinder has been described, but it is a matter of course that the function as a lock can be completely achieved by inserting only one row of discs.

Furthermore, in the embodiment, the example in which the control means is constituted by a plurality of parts is shown, but all or a part of these parts can be integrated to further simplify the structure.

<Effects of the Invention> As described above, according to the present invention, a large amount of key differences can be easily generated in a disk tumbler lock, and the keyhole 13 can be located at the center of the inner cylinder 10 so that the operation can be performed. Since there is no need to extract the disk as in the past to prepare the master key, there is no risk of analogizing the master key from the change key, and greatly improving the accuracy without lowering the performance of the lock. In addition, the inner and outer cylinders are fixed to each other by a separately prepared fixing means, so that it is possible to obtain a disk tumbler lock that cannot be picked, and it is difficult to manufacture a duplicate of the key used. is there.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the arrangement of parts in one cross section in a locked state of the embodiment of the present invention, FIG. 2 is a cross sectional view similar to FIG. 1 in an unlocked state, and FIG. FIG. 4 is an exploded perspective view of a main part of FIG. 3, FIG. 5 is a front view showing a set of disks, FIG. FIG. 7 is a side view of a disc row in which one recess is aligned, and FIGS. 8 to 11 are front views showing combinations of recesses used for locking a set of discs. 1 ... key, 2 ... makeup cover, 3 ... outer cylinder, 4 ... lock groove, 5 ... makeup head, 6a, 6b ... inner cylinder sleeve, 7 ...
... Cam, 8 ... Presser, 9 ... Fixing ring, 10 ... Inner cylinder, 11 ... Disc, 12 ... Spring, 13 ... Keyhole,
14 ... Disc hole, 15 ... Opening, 16 ... Sidebar,
17 ... ball, 18 ... fixing means, 19 ... fixing protrusion, 20
... escape prevention edge, 21 ... projecting part, 22 ... spring, 23 ...
Hole, 24 ... recess, 25 ... key receiving part.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-270482 (JP, A) JP-A-57-184167 (JP, A) Fully open Showa 61-52053 (JP, U) Really open show 55- 128849 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) E05B 29/14

Claims (1)

(57) [Claims] An outer cylinder having a lock groove which is inserted into a decorative cover and is formed on a side surface of the outer cylinder, and which is bored so as to face each other; an inner cylinder sleeve having a hole, and rotatably housed in the outer cylinder; A key hole is cut along the rotation axis, and a plurality of rows of disk holes for accommodating a pair of disks are formed at right angles to the key hole. A set of openings at right angles and facing the hole in the inner sleeve are cut in the opposite direction to each other. And a key receiving portion is provided facing the key hole at the center of the inner cylinder, and at least one key receiving portion is provided facing the opening provided from the key hole toward the outer surface of the inner cylinder. A pair of discs having a plurality of rows and a plurality of rows of discs having the recesses formed therein, A fixing projection which is protruded from the hole of the inner cylinder sleeve and can enter into the lock groove of the outer cylinder, an escape prevention edge which contacts the inner surface of the inner cylinder sleeve to limit the amount of projection of the fixing projection, A projection extending toward the keyhole of the cylinder is integrally formed and has a tendency to move toward the keyhole of the inner cylinder under the action of a spring stretched between the projection and the inner wall of the inner cylinder sleeve. Control means for holding the ball in contact with each of both ends in the longitudinal direction of the protrusion of the fixed means, and so that the ball always comes into contact with the side bar respectively accommodated along both side surfaces in the longitudinal direction of the protrusion. A disk tumbler lock, characterized in that when the disk is moved into position by a key, the side bar enters into the recess of the disk under the action of a spring.