JPH0326200Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a disk tumbler lock device comprising a combination of a lock and a key, which is applied to vending machines for various articles.

Conventionally, the lock of this type of locking device has a structure in which an inner cylinder is inserted into an outer cylinder, a side bar is positioned between both cylinders, and a large number of discs are loaded into the inner cylinder, and each disc has a set amount. When rotated, the side bar comes off from the outer cylinder, allowing the inner cylinder to rotate.

In this type of lock, the keyhole of each disk is slit-shaped and a flat key is inserted into it, so there is a problem that a flat-head screwdriver or the like can be forcibly inserted into the keyhole and be destroyed. be. To deal with this, it is possible to prevent the insertion of a screwdriver, etc. by narrowing the slit width of the keyhole, but this would require reducing the width of the key plate, which would reduce the strength of the key. It ends up. Moreover, with this type of lock, the number of different keys is determined by the number of discs, so increasing the number of different keys requires a longer overall length of the lock, which poses a problem when incorporated into equipment panels in vending machines, etc. .

This invention provides a disk tumbler lock device that prevents the insertion of a screwdriver, etc. by making the key and the keyhole of each disk into a special shape, is compact, and can increase the number of different keys. With the goal.

This invention will be specifically explained below based on embodiments shown in the drawings.

The lock device according to this invention consists of a combination of the lock shown in FIGS. 1 to 15 and the key shown in FIGS. 16 and 17. The illustrated lock includes a cylindrical outer case 1 with an open rear surface, and a front wall 1 of the outer case 1.
1 is provided with a circular keyhole 12 whose radius is the height of the actuating pieces 9a to 9c of the key. A groove 13 is formed on the inner surface of the outer cylinder 1 along the cylinder axis direction, and a guard plate 2 and an inner cylinder 3 are fitted into the outer cylinder 1 .

As shown in FIGS. 1 and 15, the guard plate 2 has a radial keyhole 21 having the same shape as the cross section of the key shaft in the center of the disc, and the guard plate 2 is fitted into the outer cylinder 1. It is inserted and joined to the inner surface of the front wall 11, and the open end surface of the inner cylinder 3 is abutted.

As shown in FIGS. 4 and 5, the inner cylinder 3 has a cylindrical shape with an open front end surface, and a mounting shaft 31 provided on the outer surface of the bottom wall protrudes from the outer cylinder 1, and a locking punch 32 is attached to the inner cylinder 3.
Fix the shaft. In the cylinder wall of the inner cylinder 3, there is a slit 33 having the same width and length as the groove 13 of the outer cylinder 1, and a notch 34 parallel to the slit 33 and having a width corresponding to the amount of rotation of the disk 5, which will be described later. The slit 33 is provided with a side bar 4 that restricts the movement of the inner cylinder 3, and the notch 34 is provided with a protrusion 61 that restricts the rotation range of each disk 5. It's getting old.

The side bar 4 is a round shaft with a thickness that fits into the groove 13 of the outer cylinder 1 and the slit 33 of the inner cylinder 3, and the side bar 4 is a round shaft with a thickness that fits inside the groove 13 of the outer cylinder 1 and the slit 33 of the inner cylinder 3. The inner cylinder 3 is connected to the outer cylinder 1 or each disk 5 via the side bar 4 by engaging and disengaging the concave groove 13 and a recess 60 of each disk 5 to be described later.

A plurality of disks 5 each having a keyhole 51 in the center are loaded into the inner tube 3 at regular intervals. The keyhole 51 has a plurality of reference sides 52 to 54 along the circumference of the hole in the radial direction, and each reference side 52 to 54.
Steps 55 to 58 are formed at different angular positions with respect to the keyhole 54 and at different radial positions from the keyhole center, and when the key is inserted into the keyhole 51 and rotated, each key piece 91 to 94 The distal end thereof is adapted to engage with the stepped portions 55-58.

On the outer periphery of each disk 5,
As shown in FIG. 3, a cam side that pushes up the side bar 4 is formed, and a keyhole 51 is formed on this cam side
The key pieces 91 to 94 of the key inserted into the step portions 55 and 5
A recess 60 is formed into which the side bar 4 engages when the disc 5 is rotated clockwise by a set angle by hooking any one of the bars 6, 57, and 58. Further, on the outer periphery of each disk 5, there is a protrusion 61 that restricts the rotation range of the disk, and a guide pin 8 of the disk return mechanism 7.
A sliding guide 62 for sliding is formed. The protruding piece 61 on each disk 5 is connected to the keyhole 51
They project in the same direction with respect to each other, engage with the notches 34 of the inner cylinder 3, and move within the range of the notches 34.

The disk return mechanism 7 includes a fixed disk 71 disposed at the bottom of the inner cylinder 3 and a drive disk 72 disposed opposite the disk 71. As shown in FIGS. 6 and 7, the fixed disk 71 has a protrusion 7 on the outer periphery of a circular plate that fits the inner cylinder 3 and that engages with the slit 33 and cutout 34 of the inner cylinder 3.
3 and a protrusion 74, and is fixed to the bottom of the inner cylinder 3. The plate surface of the fixed disk 71 has a round hole 75 in the center where the tip of the key engages, and a pair of circular grooves 7 surrounding the round hole 75 and forming a substantially semicircular shape.
6a, 76b are bored, and both circular grooves 76a, 7
Spring 77, 77 is engaged and arranged in 6b, respectively. As shown in FIGS. 6, 8, and 9, the driving disk 72 has a round hole 78, which is the same as that of the fixed disk 71, in the center of the plate surface, and each circular groove is formed in the back surface. Pins 79a and 79b that engage with the rear ends of 76a and 76b to support one end of springs 77 and 77 are implanted, and a guide that engages with the rear end of the sliding guide 62 of each disk 5 is installed on the front surface. Pin 8 is implanted. This guide pin 8 is pushed by the projection piece 61 when the disk 5 rotates, and rotates the drive disk 72 in the right direction. At this time, the pin 79a of the drive disk 72,
79b compresses springs 77, 77 in circular grooves 76a, 76b, respectively.

A retainer 6 is interposed between the adjacent disks 5. As shown in FIG. 14, each retainer 6 has two protrusions 65 and 66 that engage with both ends of the notch 34 of the inner cylinder 3, and the guide pin 8 slides between the protrusions 65 and 66. A recess 68 is formed in correspondence with the guide 67 and the slit 33 of the inner cylinder 3, with which the side bar 4 is engaged.

FIGS. 16 and 17 show the key 9 used for locking and unlocking the lock.
A plurality of actuating pieces 9a, 9b, 9c are bored on the outer periphery of the tip end of the key shaft 91 that fits the key shaft 91, corresponding to the reference sides 52 to 54 of each disc 5, and
A key piece 91, 92, 93, 94 of a height matching each step 55, 56, 57, 58 of the key hole 51 of each disk 5 is attached to each actuating piece 9a, 9b, 9c.
It is formed to correspond to the arrangement of . The key piece 91 with the maximum height engages with the stepped portion 55 of the keyhole 51 of the disk 5 shown in FIG. A recess 60 is provided at the position. 2
The highest key piece 92 is the disk 5 shown in FIG.
A recess 60 is provided on the outer periphery of the disc 5 at an angular position shifted in the direction of rotation by the rotational delay relative to the disc 5 in FIG. 10. There is. Furthermore, the third highest key piece 93 engages with the third step 57 of the keyhole 51 of the disk 5 shown in FIG. 60 is formed. The lowest key piece 94 engages with the fourth step 58 of the disk 5 shown in FIG. 13, and a recess 60 is formed on the outer periphery at an angular position further shifted in phase. Each of the above key pieces 9
1, 92, 93, 94 are respective actuating pieces 9a, 9b,
9c, but one disk 5
For the keyhole 51, among the three identical key pieces,
One key piece engages the step 55, and the other two key pieces are spaced from the step.

Therefore, when the lock is locked, the slit 33 of the inner cylinder 3 is inserted into the groove of the outer cylinder 1, as shown in FIGS. 1 and 2.
3, and the concave portion 60 of each disk 5 is spaced apart from the side bar 4 by a circumferential length corresponding to the set rotation amount. The side bar 4 is pushed up by the cam side 59 of each disk 5 and engages between the slit 33 and the groove 13, thereby fixing the inner cylinder 3 to the outer cylinder 1. At this time, the pin 8 is moved by the spring 77 to the projecting piece 61 of each disk 5.
is pressed against the notch 34 of the inner cylinder 3, and the keyhole 51 is aligned.

Now, when inserting the key 9 into the keyhole and turning it to the right when unlocking, the key pieces 91 to 94 of different heights
The disks 5 corresponding to the order of height are rotated sequentially with a delay. At the end of rotation, the recesses 60 of each disk 5 are aligned in a row and positioned corresponding to the slits 33,
The side bar 4 engages with the recess 60 of each disk 5 and escapes from the recess 13 of the outer cylinder 1. At this point, the guide pin 8 reaches the forward end of the sliding guide 59 of each disk 5, and the pin 79 in the circular grooves 76a, 76b
a and 79b compress springs 77 and 77, respectively. When the key 9 is subsequently rotated clockwise, each disc 5 rotates the inner cylinder 3 through the side bar 4, and tilts the cam side 32 on the mounting shaft 31 in the unlocking direction.

Next, when turning the key 9 in the opposite direction when locking,
Each of the key pieces 91 to 94 rotates the corresponding disc 5 in the opposite direction to the unlocking order, and at the same time, the drive disc 72 is reversed by the springs 77, 77, and the guide pin 8 rotates each disc 5. restore it to its original state. In addition, since the key hole 21 of the guard plate 2 fitted inside the front wall 11 of the outer cylinder 1 matches the cross section of the key shaft, the disk 5 placed on the back side of the guard plate 2 has a specified height. It cannot be turned with anything other than the key piece, completely preventing picking.

As described above, this invention is a disk tumbler lock device consisting of a combination of a lock and a key, in which a plurality of actuating pieces are provided protruding from the outer periphery of the key shaft of the key, and each actuating piece is formed with a key piece having a different height. On the other hand, since the keyhole of each disk of the key is formed with a reference side and a stepped part corresponding to the actuating piece and the key piece, the keyhole can be set small without reducing the strength of the key. This completely prevents screwdrivers from being inserted into the keyhole. Furthermore, since a large number of different keys can be set in the keyhole of a single disk, it is effective in reducing the size of the lock, increasing the number of different keys, and preventing picking.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of the lock, Figure 2 is Figure 1-
3 is a cross-sectional view of FIG. 2 when the lock is unlocked, FIG. 4 is a perspective view of the inner cylinder, FIG. 5 is a plan view of FIG. 4, and FIG. 6 is a diagram of the disk return mechanism. Perspective view, 7th
8 is a plan view of the drive disk, FIG. 9 is a front view of the drive disk, FIGS. 10 to 13 are plan views of the disk, and FIG. 14 is a plan view of the retainer. FIG. 15 is a plan view of the guard plate, FIG. 16 is a front view of the key, and FIG. 17 is a perspective view of the key. 1... Outer cylinder, 2... Guard plate, 3... Inner cylinder, 11... Slit, 13... Concave groove, 4... Side bar, 5... Disk, 51... Keyhole, 5
2, 53, 54...Reference side, 55, 56, 57,
58...Step part, 60...Recessed part, 7...Disk return mechanism, 9...Key, 91...Key shaft, 9a, 9b,
9c... Operating piece, 91, 91, 93, 94... Key piece.

Claims (1)

[Claims for Utility Model Registration] A disc tumbler lock device consisting of a combination of a lock and a key, the lock comprising an outer cylinder 1, an inner cylinder 3 rotatably fitted into the outer cylinder 1, , a plurality of disks 5 loaded in the inner cylinder 3 at regular intervals, and the inner cylinder 3 is engaged with the inner cylinder 3 and disengaged from the groove 13 provided on the inner surface of the outer cylinder 1.
Each disk 5 has a keyhole 51 in the center and a plurality of reference sides 52 to 54 along the radial direction around the hole.
and stepped portions 55 to 58 are formed at different angular positions with respect to each reference side and at different radial positions from the keyhole center, and the key is formed at each of the reference sides 52 on the outer periphery of the key shaft 91.
Actuating pieces 9a, 9b, at angular positions corresponding to ~54.
Each disk 5 is arranged with key pieces 91 to 94 protruding from each other, and key pieces 91 to 94 that have a height corresponding to one of the stepped portions 55 to 58 of the disk 5 and engage with the stepped portion on each operating piece. Each key piece 91 of the key is formed on the outer periphery of each disk 5.
- 94 and the stepped portions 55 to 58 of the lock are formed with recessed portions 60 at different positions depending on the engagement positions of the step portions 55 to 58 of the lock,
When each disc 5 rotates at a set angle, the recesses 60 of each disc 5 align in a straight line, causing the side bar 4 to escape from the recess 13 of the outer cylinder 1 and engage into the recess 60. Device.