JP3002995B2 - Disc tumbler tablets - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a disk tumbler lock of a type that can completely prevent picking and can easily set a large number of master keys and grand master keys.
The present invention relates to a disk tumbler lock in which more key differences can be applied to a range of a disk movement amount equivalent to a conventional one.

<Conventional technology and its problems> Disc tumbler locks have been manufactured in various products from the past, and are widely used for general door locks, vehicle locks, and the like.

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 the integrity of the tablet, the length of the tablet was inevitably too long, and only unsatisfactory results were obtained.

To solve this problem, the applicant filed February 24, 1990.
Patent application dated, title of invention "Disc tumbler lock"
(Japanese Patent Application No. 2-43591) proposed a disk tumbler lock based on a novel idea as shown in FIGS. 8 and 9 attached to the present application.

According to the invention disclosed in the patent application, the direct use of the disc D to fix the inner cylinder I and the outer cylinder O to each other is abandoned, and a recess H is formed in a side edge of the disc D, The type in which the alignment of the recess H is detected and the fixing means F of the separately installed inner cylinder and outer cylinder is operated based on the detection result is adopted.

By such a method, the key difference can be greatly increased, the setting of the grand master key and the master key can be made in a wide selection range, and the key mountain of the master key is inferred from a plurality of change keys. An advantageous disk tumbler lock that can prevent such a situation has been completed.

<Problems to be Solved by the Invention> The invention described in the above-mentioned patent application has been completed by itself and has already reached the stage of actual production. Were further improved and succeeded.

A desirable lock is one that can generate a large number of key differences without complicating the manufacturing process.

To this end, the smaller the height difference between the key ridges, the larger the key difference can be obtained with a constant moving amount of the disk.

If such a high-precision structure can be obtained, it is possible to set, for example, five steps or more in the dimensions in which the change of the key hill was previously determined in three steps. .

If we could simply change the key hills from three steps to five steps in the same dimensions, we would have 7 such discs each.
The number of sheets of the key differences in the case of use, the 5 ⁷ = 78,125 ways the case of 3 ⁷ = 2,187 ways Godan the case of a three-stage.

However, if the height difference of the key pile is too small, the manufacturing accuracy of the lock and the key cannot keep up with it, and it is theoretically possible, but a lock that cannot be actually manufactured or used is completed. There is a risk that it will.

As described above, in the type in which the recess H is formed in the side edge of the disk D and the alignment of the recess is detected, the detection means S is a rod-shaped part having a circular cross section.
The recess H at the side edge of the disk D into which the disk was fitted was also substantially semicircular. (See FIG. 8 and FIG. 9.) This is because the detecting means S is always urged in the direction of coming into contact with the disk D by the action of a spring or the like. Is detected by the detecting means S which has moved into the disk D
With the operation of, to be pushed out of the recess easily and quickly,
This is the adopted shape.

The simplest method is to adopt such a shape in order to cause the detecting means S, which is biased to enter the recess H of the disk D, to escape from the recess H as the disk D moves.

However, according to such a shape of the recess H, the recess H has a semicircular shape with an open bottom, so that it is necessary to clearly determine whether or not the detecting means S has entered the recess H to an appropriate depth. It has been found that it is safe to keep the position of the recess H at about three steps within the predetermined dimensions, and that there is little possibility that a problem will occur in the production. (See Fig. 6) If a large number of step changes are forcibly set in the dimensions, it will be difficult to distinguish between adjacent steps.
There was a possibility that it would not be able to withstand actual use.

<Means for Solving the Problems> In order to obtain a greater number of changes in the number of steps within a given dimension, the shape of the recess is changed so that at least two sides of the recess are in the moving direction of the disk. It is desirable to form a straight line having a right angle or a fixed angle.

This means that two sides of the recess are cut out parallel to each other and linearly from the side edge of the disk. (See FIG. 7) It is desirable that at least two sides are formed by straight lines, but in order to facilitate manufacture, the shape of the notch should be
It is desirable that the three sides have a substantially U-shape formed by straight lines.

The shape of the detecting means corresponding to the depression is such that the cross section of the portion that enters the depression is formed by straight lines on two or three sides.

When such a concave shape is adopted, it can be seen that, within the dimensions of the three-stage recess in the invention of the prior application, the five-stage recess can be installed with a large margin, as shown in FIGS. 6 and 7. It is clear from the comparison.

However, if the detecting means having a linear cross section enters the recess formed in such a linear shape, the disc cannot be moved, so that the detecting means is moved out of the recess by removing the key as in the related art. You will not be able to push it out.

This point is solved by changing the idea and tensioning the spring so that the detection means is always biased away from the disk.

At the same time, conventionally, the outer cylinder O protrudes from the inner cylinder I of the lock.
Is changed from the fixing means F, which penetrates a part of the inner cylinder and retreats to the inside of the inner cylinder when the inner cylinder is rotated, in which both are fixed.

The new fixing means has a simple structure such as a round bar, and preferably has a shape in which a half of the cross section of the round bar is projected into the outer cylinder from the shear line of the inner cylinder and the outer cylinder. (See FIGS. 1 to 5) When the inner cylinder is rotated in a state where the recesses of the disk are aligned and the detecting means can enter the recess (FIG. 2), the fixing means is moved to the outer cylinder. Pressed and retracted into the inner cylinder (Fig. 3),
While the inner cylinder is being rotated, since the detecting means is recessed in the recess and the fixing means is pressed by the inner periphery of the outer cylinder,
The key cannot be removed (see FIG. 4).

When the fixing means comes to a position where it can protrude into the outer cylinder, the detection means escapes from the recess as the fixing means moves, so that the disk is free and the key can be removed for the first time (returned to FIG. 2). Status).

<Operation> According to the present invention, by using a single key in which two rows of left and right keys are carved and aligning the upper and lower recesses of each of the left and right disc rows in one row, the detecting means can be inserted into the recess of the disc. After being able to accept, the inner cylinder is rotated to retract the fixing means into the inner cylinder, and the unlocking / locking operation is performed.

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

1 to 4 are sectional views of the disk tumbler lock of the present invention.

In the drawing, 1 is an outer cylinder of a disk tumbler lock, 2
Is a coating tube of the inner cylinder 2 which rotates integrally with the inner cylinder 2 inside the outer cylinder 1.

The inner cylinder 2 is provided with a keyhole 4 at substantially the center thereof, and a disk hole 5 is formed at right angles to the keyhole 4. In the case of the present embodiment, a part of the disk hole 5 is opened to the key hole 4 and a plurality of disk holes 5 are formed in parallel with each other. Disc hole 5
At right angles are provided holes 6 for detecting means.

Each disk hole 5 accommodates a disk 7 and is urged in one direction in the disk hole 5 by the action of a spring 8.

The portion of the disk 7 located in the keyhole 4 is provided with a key receiving portion for abutting against the key ridge of the key K inserted into the keyhole 4, whereby the disk 7 is pushed up against the action of the spring 8. 9 are installed.

Also, on the side edge 7 ′ facing the receiving hole 6 of the disc 7,
A recess 10 is drilled. In the case of this embodiment, the shape of the recess 10 is a U-shape formed by two sides perpendicular to the side edge 7 'of the disk 7 and one side parallel to the side edge 7'. Further, recesses 10 are drilled at two places on the side edge 7 'of one disk 7.

Detecting means is accommodated in the accommodation hole 6, and in the case of the embodiment, the detecting means is constituted by an upper moving piece 11 and a lower moving piece 12 which are slidably overlapped.

Each moving piece has an indentation protrusion 1 that intrudes into the aforementioned recess 10.
3, 14 and each of the curved portions 15, 1 facing each other
Has 6.

Fixing means 18 that partially indents into recesses 17 formed in the inner wall of outer cylinder 1 through coating tube 3 facing storage hole 6
Is accommodated in a depression 19 formed by facing curved portions 15 and 16 provided on the upper moving piece 11 and the lower moving piece 12. However, the transmission piece 20 is accommodated in the recess 19, and the transmission piece 20 is always in contact with the upper and lower moving pieces 11 and 12, and the fixing means 18.

The upper and lower moving pieces 11, 12 are always urged by a spring (not shown) in a direction to move away from the disk 7, and the tendency is transmitted to the fixing means 18 via the transmitting piece 20, and the fixing means 18 is fixed. Has also been given a tendency to always move away from the disk 7.

In this manner, for one or more disks 7 (although the number of disks 7 is generally plural if considered in common sense), a single upper moving piece 11, a lower moving piece 12, and a transmitting piece 20 are respectively provided. And a fixing means 18 are prepared, but it is desirable that all of these parts have a sectional shape as shown in FIG.

The embodiment of the present invention is completed by arranging two sets of the mechanisms formed as described above symmetrically in the inner cylinder 2 of one lock device (see FIGS. 1 to 4). Of course, it is possible and arbitrarily possible to operate the lock with only one set of this mechanism.

 Next, the operation will be described.

FIG. 1 shows the arrangement of internal components in a locked state in which the inner cylinder 2 and the outer cylinder 1 are fixed to each other by the fixing means 18 and rotation of the inner cylinder is prevented.

In this state, the disk 7 is pushed down by a spring 8 in the figure, and the upper moving piece 11 and the lower moving piece 12 are moved toward the outer cylinder 1 in the housing hole 6 by the action of the spring (not shown). The fixing means 18 which is urged and receives the force via the transmission piece 20 is partially recessed into the concave portion 17 of the outer cylinder 1.

In this state, if the user tries to rotate the inner cylinder 2 without using an appropriate key, the fixing means 18 is pressed by the recess 17 of the outer cylinder 1 and tries to move into the accommodation hole 6 of the inner cylinder 2. Since the recesses 10 of the disk 7 are not aligned, the upper moving piece 11 or the lower moving piece
12 indentation protrusions 13 and 14 cannot invade recess 10,
The movement is prevented by the side edge 7 'of the disk 7. for that reason,
The fixing means 18 cannot escape from the concave portion 17, and as a result, the outer cylinder 1 and the inner cylinder 2 are fixed to each other, and undesired rotation of the inner cylinder 2 is completely prevented.

Next, when an appropriate key K is inserted into the keyhole 4, the disk 7 is pushed up to an appropriate position by the key K as shown in FIG. Can be. In the example shown in FIG. 2, the left disk 7 has the upper recess 10 aligned, and the right disk 7 has the lower recess 10 aligned.

When the inner cylinder 2 is rotated from such a state, the fixing means 18
Is pressed by the wall surface of the concave portion 17 of the outer cylinder 1 (see FIG. 3) and moves into the accommodation hole 6. At that time, the left disk 7
The indentation protrusion 13 of the left upper moving piece 11 facing the upper concave portion 10 can move to enter the concave portion 10 on the left disk 7, and the lower lower concave portion 10 Since the indentation protrusion 14 of the lower right moving piece 12 facing the right side can be moved into the recess 10 below the right disk 7, the movement of the fixing means 18 is performed by the transmission piece.
It is transmitted to the upper moving piece 11 on the left and the lower moving piece 12 on the right via 20 and both moving pieces are springs (not shown) as shown in FIG.
Moves in the direction of the disk 7 against the action of the above, the shape of the depression 19 formed by the upper and lower moving pieces 11 and 12 is changed, and the fixing means 18 is completely turned into a shear line between the outer cylinder 1 and the coating tube 3. (See FIG. 4).

Therefore, the inner cylinder 2 can be freely rotated, and this state continues until the fixing means 18 enters the recess 17 of the outer cylinder 1 next.

For example, in the case of the present embodiment, assuming that the inner cylinder can be unlocked / locked by rotating it by 90 degrees, the state of FIG. 1 is changed to the state of FIG. 4 through the states of FIGS. 2 and 3. Then, it is further reversed to return to the state shown in FIG.

In this case, at the position shown in FIG. 4, the fixing means 18 abuts against the inner wall of the outer cylinder 1 and cannot move, so that the upper and lower moving pieces cannot slide. The key K cannot be removed from the keyhole 4 because the disk 14 is fixed in the recess 10 by recessing the disk 7.

When the operation of the lock is completed and the inner cylinder 2 is returned to the starting position in FIG. 2, a spring (not shown) can be inserted into the recess 17 of the outer cylinder 1 facing the fixing means 18. The upper and lower moving pieces slide toward the outer cylinder 1 by the action of
The indentation protrusion of the moving piece escapes from the recess 10 of the moving piece. The operation is transmitted to the fixing means 18 by the transmission piece 20, and the fixing means 18 is partially recessed in the concave portion 17, and the inner cylinder 2 and the outer cylinder 1 are fixed to each other.

As a result, the disk 7 is disengaged from the upper and lower moving pieces, so that the disk 7 can move freely. At this point, the key K can be removed from the keyhole 4.

In the drawings, the case where the operation is performed by rotating the inner cylinder by 90 degrees is shown. However, as is apparent from the drawing, the operation can be performed by rotating the inner cylinder by 180 degrees.
In the case shown in the figure, the key K can be easily removed by installing the key K at that position.

<Effect of the Invention> In the present invention, the setting and operation method of the grand master key, master key, and change key are disclosed in the above-mentioned patent application filed on February 24, 1990, titled "Disc Tumbler Lock". Since the method described above can be followed as it is, and in addition, a larger number of steps can be set in a predetermined range of the disk 7,
There is an effect that the number of key differences can be dramatically increased.

[Brief description of the drawings]

1 to 4 are cross-sectional views of a main part of the present invention. FIG. 1 is a locked state, FIG. 2 is a key inserted state, FIG. 3 is a rotation start state of the inner cylinder, and FIG. FIG. 5 is an enlarged perspective view of a moving piece, a transmitting piece and a fixing means used in the present invention, FIG. 6 is an explanatory front view of a disk of the prior application, FIG. 7 is an explanatory front view of a disk according to the present invention, FIGS. 8 and 9 are cross-sectional views of a main part of the prior application, FIG. 8 shows a locked state, and FIG. 9 shows an unlocked state, respectively. . 1 ... outer cylinder, 2 ... inner cylinder, 3 ... coated tube, 4 ...
Key hole, 5 ... Disc hole, 6 ... Accommodation hole, 7 ... Disc, 8 ... Spring, 9 ... Key receiving part, 10 ... Recessed part,
11 ... upper moving piece, 12 ... lower moving piece, 13, 14 ... indentation projection, 15, 16 ... curved part, 17 ... concave part, 18 ... fixing means,
19 ... hollow, 20 ... transmission piece, K ... key.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E05B 29/10 E05B 35/10

Claims (1)

(57) [Claims] An outer cylinder having recesses formed in the inner wall so as to be opposed to each other; a cover tube installed in a covering tube allowing passage of fixing means housed in the recesses and rotatably housed in the outer cylinder. A keyhole 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 keyhole. A set of receiving holes perpendicular to the holes and facing the recesses of the outer cylinder are received in the inner cylinder and the disc holes of the inner cylinder that are cut out facing each other. A key receiving portion is installed facing the key hole at the center of the inner cylinder while being positioned at the lowest position in the hole, and facing the accommodation hole installed from the key hole toward the outer surface of the inner cylinder. At least one recess, with two sides perpendicular to the disc hole and one side A set of two discs and a plurality of rows cut in parallel with the holes, and an indentation projection or an outer cylinder which is stacked and received in each of the receiving holes of the inner cylinder, and which can face the disc and enter the recess of the disc. An upper moving piece and a lower moving piece having a curved portion facing the concave portion of the inner wall, and are accommodated in a recess formed in the accommodation hole by the curved portions of the two moving pieces, and are always fixed to the upper moving piece and the lower moving piece. And a transmitting piece that abuts the moving piece, wherein the fixing means and the transmitting piece are rod-shaped bodies having a circular cross section, and the upper moving piece and the lower moving piece are urged toward the fixing means. Disk tumbler tablets.