JP2002089093A - Disk lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the fraudulent unlocking, so-called 'picking'. SOLUTION: This disk lock device comprises a key formed with key ridges in a recessed groove along the length direction of the side face of a key plate and a lock body 1 unlocked or locked when the key is inserted or removed. The lock body 1 is provided with a plurality of disks 30-34 in an inner tube 2 rotatably supported in an outer tube 3. Projections 13a-13d entering the recessed groove of the key are formed on the hole edges of the key insertion holes of the disks 30-33 of a first group, however no projection is formed on the key insertion hole of the disk 34 of a second group. The coupling with disk coupling grooves 14A and 14B is released when the projections 13a-13d hit the key ridges and are pressed in the radial direction on the disks 30-33 of the first group and the hole edge of the key insertion hole hits the side end face of the key plate and is pressed in the radial direction on the disk 34 of the second group.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk lock device in which a plurality of disks are loaded in a lock body, and more particularly to a disk lock device having a structure capable of preventing unauthorized unlocking of a lock body called "picking". The present invention relates to a disk lock device.

[0002]

2. Description of the Related Art As a conventional disk lock device, there is a disk lock device comprising a combination of a key A having a structure as shown in FIG. 18 and a lock body B having an internal structure as shown in FIG. The key A has a concave groove 201 along the length direction of the key plate side surface 200.
A key hill 202 is formed inside. The lock body B
Is an unlocking operation by inserting the key A and a locking operation by removing the key A. The outer cylinder 103 is rotatably supported in the outer cylinder 103 by reciprocating movement in the radial direction.
A plurality of discs 100 engaging and disengaging from the disc engaging groove 105 on the inner surface of the disc, and a plurality of springs 107 for pressing each disc 100 in the direction of the disc engaging groove 105 are provided.

Each disk 100 has an engaging projection 1 on its outer peripheral edge.
06, a key insertion hole 100a is provided on the plate surface, and a groove 201 of the key A is provided at the edge of the key insertion hole 100a.
A projection 100b is formed. Key A to lock body B
When the disk 100 is inserted into the key insertion hole 100a of each disk 100, the protrusion 100b is pressed by the key crest 202 of the key A, and each disk 100 moves. Is disengaged from the disk engaging groove 105.

[0006] The lock body B shown in FIG. 20 is obtained by adding a side bar 111 and a structure related thereto to the above-described structure.
Between the side bar 111 and the side bar 111 which engages and disengages with the side bar engagement groove 110 on the inner surface of the outer cylinder 103 by reciprocating movement in the radial direction.
And a spring 112 for pressing the side bar 111 in the direction of the side bar engaging groove 110.

[0005] At the outer peripheral edge of each disk 100, a rectangular cutout 113 into which the leg 111a of the side bar 111 can enter is formed. In a state where the engaging protrusion 106 of the disc 100 is engaged with the disc engaging groove 105,
Since the leg portion 111a of the side bar 111 faces the peripheral portion 100c of the disk 100, the movement of the side bar 111 in the radial direction is restricted. On the other hand, in a state in which the engagement between the engaging projection 106 of the disc 100 and the disc engaging groove 105 is completely disengaged, the leg 111 a of the side bar 111 faces the notch 113. Movement to is allowed.

[0006]

In the disk lock device having the above-mentioned structure, the key 100 of the key A inserted into the lock body B pushes the projection 100b of each disk 100 to push the disk 10
0, thereby unlocking the disk 100 by releasing the engagement between the engagement projection 106 of each disk 100 and the disk engagement groove 105 of the outer cylinder 103. A rod-shaped tool is prepared and inserted into the lock body B, and the protrusion 100b of each disc 100 is
Are sequentially hooked to move each disk 100, whereby the engaging projections 106 of all the disks 100 and the outer cylinders 10 are moved.
3 is disengaged from the disk engaging groove 105.

In this case, since each disc 100 is pressed by the spring 107 in a direction in which the engaging projection 106 engages with the disc engaging groove 105 of the outer cylinder 103, the disc 100 is prevented from returning. In order to engage
At the moment when the disc 6 and the disc engaging groove 105 are disengaged from each other, the disc 100 is slightly rotated so that the engaging projection 106 is hooked on the groove opening edge of the disc engaging groove 105. In this manner, the engaging projections 106 of the disc 100 are successively formed.
The "picking" proceeds while the engagement between the disk engaging groove 105 of the outer cylinder 103 and the disk engaging groove 105 is released and held.

[0008] The present invention has been made in view of the above-mentioned problem, and includes a plurality of disks, each of which does not have a projection provided in a key insertion hole, and
An object of the present invention is to provide a disk lock device that prevents unauthorized unlocking called "picking".

[0009]

According to a first aspect of the present invention, there is provided a disk lock apparatus comprising: a key having a key ridge formed in a concave groove along a longitudinal direction of a side surface of a key plate; And an unlocking or locking body. The lock body includes a plurality of disks which are engaged with and disengaged from a disk engaging groove formed on the inner surface of the outer cylinder by reciprocating movement in a radial direction with respect to the inner cylinder rotatably supported in the outer cylinder. A plurality of springs are provided for pressing in the direction of the mating groove. Each disk is provided with a key insertion hole on the plate surface. The first group of discs has a projection at the edge of the key insertion hole, which enters the groove of the key, and the projection is pressed against the key of the key in the radial direction to engage with the disc engagement groove. So that it comes off. On the other hand, in the second group of disks, the key insertion hole is formed in a shape without protrusions,
The edge of the key insertion hole contacts the side end surface of the key plate and is pressed in the radial direction so that the engagement with the disk engagement groove is released.

In this disk lock device, "the unlocking operation" of the lock body means that the inner cylinder can be rotated with respect to the outer cylinder. Further, "locking operation" means that it becomes impossible to rotate the inner cylinder with respect to the outer cylinder. The “first group of disks” and the “second group of disks” may be in any composition ratio, but if the lock body has the “first group of disks” as the main disk, the “second group of disks” "May be used at least one sheet.

According to a second aspect of the present invention, in addition to the configuration of the disk lock device of the first aspect, the inner surface of the outer cylinder is reciprocated in a radial direction between the outer cylinder and the inner cylinder. A side bar engaging and disengaging from the bar engagement groove and a spring for pressing the side bar in the direction of the side bar engagement groove are provided. Each disc regulates the radial movement of the sidebar when the disc is engaged with the disc engaging groove, and the radial direction of the sidebar when the disc is disengaged from the disc engaging groove. It is formed to allow movement to At a portion where each disk and the side bar face each other, a meshing portion is formed which is engaged by displacing the side bar in the direction of the disk.

[0012]

In the disk lock device according to the first aspect of the present invention,
When the key is inserted into the lock body and the key insertion hole of each disk is inserted, the projections of the key insertion hole are pushed in the radial direction by the key peaks of the key, and the first group of disks is disengaged from the disk engagement groove. Disengagement. On the other hand, in the second group of disks, the hole edge of the key insertion hole is pressed in the radial direction by the side end surface of the key plate, and the engagement with the disk engagement groove is released. Even if an elongated bar-shaped tool is inserted into the lock body to perform "picking", the second group of discs cannot be moved by hooking with the bar-shaped tool because there is no protrusion in the key insertion hole. Unauthorized unlocking is difficult.

In the disk lock device according to the second aspect of the present invention, the sidebar is allowed to move in the radial direction only after the disk is disengaged from the disk engaging groove. If the disk is slightly rotated in a state where the engagement with the disk engaging groove is not sufficiently disengaged, the side bar is displaced in the direction of the disk, and the engagement portion is engaged. Therefore, the disk cannot move any more, and the disk and the disk engaging groove are not completely disengaged.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk lock device according to the present invention comprises a lock body 1 having an external appearance as shown in FIGS. 1 and 2, and a key 8 having an external appearance as shown in FIG. The lock body 1 is attached to, for example, a door at the entrance, and a key 8 (not shown) is rotated by inserting a key 8 into a key hole 5 of the lock body 1 and turning the key. Disengage with the receiving bracket attached to.

The lock body 1 of this embodiment has a structure in which the inner cylinder 2 is rotatably supported in the outer cylinder 3. In the following description, the key 8 is inserted into the outer cylinder 3 to The state in which the inner cylinder 2 can be rotated is referred to as “unlocked state”.
The state in which the inner cylinder 2 cannot be rotated is referred to as a “locked state”. FIGS. 4 to 6 show the internal structure of the lock main body 1 in a cross section in the length direction. FIGS. 4 and 5 show a horizontal cross section in the “locked state” (along the line AA in FIG. 1). Cross section)
And a vertical cross-sectional view (a cross-sectional view along line BB in FIG. 1)
FIG. 6 is a horizontal cross-sectional view (cross-sectional view along the line AA in FIG. 1) of the “unlocked state”. In addition, a vertical cross-sectional view of the “unlocked state” (a cross-sectional view along the line BB in FIG. 1)
Are the same as in FIG. 5 and are not shown.

FIGS. 7 to 12 show the internal structure of the lock body 1 in a radial cross section. FIGS. 7 and 10 show the "locked state" along the line CC in FIG. 8 and FIG. 11 show the “unlocked state”.
FIG. 9 and FIG. 12 are cross-sectional views taken along the lines CC and DD of FIG. 5 when the key 8 is rotated. Are respectively shown in FIG. The line CC is set at a disk position of a first group to be described later, and the line DD is set at a disk position of a second group.

The key 8 shown in FIG.
And a flat key plate 81 having a length corresponding to the entire length of the inner cylinder 2. The key plate 81 has a tip 87 formed in a tapered shape. A concave groove 83 is formed in the key plate side surface 82 along the length direction.
Key ridges 84 having different heights are formed continuously in the length direction.

The lock body 1 includes a plurality of disks 30 to 34 supported reciprocally in a radial direction inside an inner cylinder 2 rotatably supported in an outer cylinder 3, and each disk 30. ~
A plurality of springs 15 for applying a pressing force in the radial direction to
And are loaded. A side bar 41 capable of reciprocating in the radial direction is provided between the outer cylinder 2 and the inner cylinder 3. The outer cylinder 2 applies an outward pressing force to the side bar 41. A plurality of springs 50 are supported.

The outer cylinder 3 is a cylindrical body having both ends opened.
At the diagonal position of the inner peripheral surface, the first and
The disk engaging grooves 14A and 14B engaging and disengaging from the second engaging convex portions 11P and 11Q are also provided on the inner peripheral surface.
4A, 14B, the side bar 41
Each of the side bar engagement grooves 46 engaging and disengaging from the engagement head 42 of each is formed over substantially the entire length. Each of the above springs 1
5 has one end supported by the inner cylinder 2 and the other end supported by the disks 30 to 34 so as to press the corresponding disks 30 to 34 in the direction of one of the disk engaging grooves 14A and 14B. In this embodiment, the one engaging with one of the disk engaging grooves 14A and 14B by the pressing of the spring 15 is defined as a first engaging convex portion 11P, and the other is defined as a second engaging convex portion 11Q.

A cover 6 covers the opening on the front surface of the outer cylinder 3. The cover 6 has a circular opening 6a at the center. A disc-shaped front plate 4 rotatably supported by the outer cylinder 3 faces the opening 6a. The front panel 4 has a key 8
A rectangular keyhole 5 having a shape and a size suitable for the outer shape of the key plate 82 is formed.

A front end face of the inner cylinder 2 is open, and a through hole 37 having a shape and a size suitable for the outer diameter of the key plate 82 of the key 8 is formed behind the opening. On the rear end face of the inner cylinder 2,
The plate driving portions 39, 39 protrude, and constitute a latch operating mechanism 70 for operating the latch. On the outer peripheral surface of the inner cylinder 2, a holding hole 47 for holding the side bar 41 is formed in the length direction over substantially the entire length of the inner cylinder 2. The bottom of the holding hole 47 is connected to the disk accommodation space 3 through a support groove 48 that supports the leg 43 of the side bar 41.
Connect to 6. A side bar 4 is provided on the bottom of the holding hole 47.
A spring 50 for pressing the spring 1 in the direction of the side bar engagement groove 46 is supported.

In the inner cylinder 2, a plurality of disk accommodation spaces 36 accommodating the disks 30 to 34 are formed at regular intervals in the longitudinal direction. Each disk accommodation space 36 has a partition 38
The spring 15 is held at the bottom.
In this embodiment, ten rows of disk accommodation spaces 36 are provided, and each disk accommodation space 36 has a first engaging projection 1.
Each disk 3 is set so that the direction of 1P is alternately opposite.
0 to 34 are provided.

As shown in FIGS. 13 and 14, each of the disks 30 to 34 is made of a thin metal plate, and has first and second engaging projections 11P and 11Q formed on the outer peripheral edge thereof.
On the plate surface, horizontally long key insertion holes 12 and 22 are provided.
The discs 30 to 33 of the first group shown in FIG. 13 have projections 13 a to 13 which enter the groove 83 of the key 8 at the edge of the key insertion hole 12.
d, but the second group of disks 34 shown in FIG.
No protrusion is formed on the edge of the key insertion hole 22. The discs 30 to 33 of the first group are pressed in the radial direction by the projections 13 a to 13 d hitting the key peak 84 of the key 8,
The first engagement projection 11P of each of the disks 30 to 33 is configured to be disengaged from one of the disk engagement grooves 14A and 14B.

The second group of discs 34 is pressed in the radial direction by the hole edge 23 of the key insertion hole 22 hitting the side end face 85 of the key plate 81, so that the first engagement projection 1 of the disc 34 is formed.
1P and one of the disk engaging grooves 14A and 14B is disengaged. In this embodiment, the first group of disks 30 to 33 is composed of nine disks, and the second group of disks 34 is composed of one disk. However, two or more disks of the second group may be provided.

The second group of disks 34 has a cutout 24 formed at the hole edge 23 of the key insertion hole 22. When the lock body 1 is in the “locked state”, the notch 24 has its bottom located outside the hole edge of the through hole 37 of the inner cylinder 2. Thus, when the elongated rod-shaped tool is inserted, the through-hole 37 of the inner cylinder 2 is inserted before the tip of the rod-shaped tool hits the bottom of the cutout 24.
Therefore, it is difficult to hook and move the disk 34.

The second engaging projection 1 of each of the discs 30 to 34
1Q is located in the inner cylinder 2 when the lock body 1 is in the "locked state", and the leading edge is aligned with the outer peripheral edge of the inner cylinder 2 when the lock body 1 is in the "unlocked state". When the rod enters the inner cylinder 2, it engages with the disk engaging groove 14B to prevent the rotation of the inner cylinder 2.

On the outer peripheral edge of each of the disks 30 to 34, a first
A concave portion 45 is provided to allow the side bar 41 to move in the radial direction in a state where the engaging projection 11P is disengaged from the disk engaging grooves 14A and 14B. Sidebar 41
Is moved in the radial direction, the side bar 41 is
The leg 43 enters. Recess 4 of each disk 30-34
A meshing portion 62 in which a large number of cut grooves are continuous is formed on the outer peripheral edge sandwiching No. 5, that is, a portion facing the side bar 41 in the “locked state”.

On the outer peripheral edge of each of the discs 30 to 34, a rectangular notch 17 is provided at a position opposite to the recess 45, and one end of the spring 15 is provided at one of the edges of the notch 17, The other ends are respectively supported by the spring support portions 16 of the inner cylinder 2.

The side bar 41 has a length substantially corresponding to the entire length of the inner cylinder 2, and as shown in FIGS.
A leg 43 is integrally provided on the lower surface of the rounded engagement head 42. A support hole 44 for supporting an end of the spring 50 is formed on a lower surface of the engagement head 42, and a tip of the leg 43 is
Meshing portion 6 meshing with meshing portion 62 of each disk 30-34
1 is formed.

The reciprocating movement of the side bar 41 in the radial direction causes the engaging head 42 to be disengaged from the side bar engaging groove 46 of the outer cylinder 3. When the inner cylinder 2 is rotated while the lock body 1 is in the “unlocked state”, the side bar 41 is pushed against the inner peripheral surface of the outer cylinder 3 as shown in FIGS. The engaging head 42 rides on the inner peripheral surface of the outer cylinder 3 from the side bar engaging groove 46 against the force. At this time, the leg 43 is
It enters the recesses 45 of 0 to 34.

If the inner cylinder 2 is rotated when the lock body 1 is in the "locked state", the side bar 41 is pushed against the wall surface of the side bar engaging groove 46, as shown in FIG.
Is displaced in the direction of the discs 30 to 34 against the spring force of. As a result, the meshing portion 61 of the side bar 41 bites into the meshing portion 62 of the disks 30 to 34, and the disks 30 to
34 is prevented from moving in the radial direction. As a result, the engagement between the first engagement projection 11P and the disk engagement grooves 14A and 14B is not released, and the inner cylinder 2 cannot be further rotated.

The latch operating mechanism 70 is a rotatable circular plate 71A, 71B connected to the plate driving portions 39, 39 of the inner cylinder 2, and a flat plate that rotates integrally with the plates 71A, 71B. The driving plate 72 includes a driving bolt 72 and a dead bolt 75 connected to the driving plate 72 via a cylindrical joint member 74. A latch is attached to the dead bolt 75.

The driving plate 72 has an engaging portion 73 into which the tip 87 of the key 8 is engaged. The tip of the driving plate 72 is rotatably fitted into the connection hole 74 a of the joint member 74. I have. When the key 8 is inserted and turned, the joint member 74 starts rotating after the drive plate 72 idles 90 degrees in the connection hole 74a. In the figure, reference numeral 90 denotes an O-ring fitted on the inner peripheral surface of the outer cylinder 3, and a joint member 74.
Is prevented from being displaced rearward.

Next, the operation of the lock body 1 will be described with reference to FIGS. In the “locked state”, the first engaging projections 11P of the discs 30 to 34 receive the pressing force of the spring 15
Is inserted into one of the disk engaging grooves 14A and 14B and is engaged, so that the inner cylinder 2 cannot rotate (FIGS. 4, 7, and 10). At this time, the sidebar 41
The engaging head 42 is pressed by the spring 50 to engage with the side bar engaging groove 46, and the leg 43 of the side bar 41 is displaced from the concave portion 45 of each of the discs 30 to 34.

When the key plate 81 is inserted into the keyhole 5 and the lock body 1 is in the "unlocked state" (FIGS. 6, 8 and 11), the first group of discs 30 to 33 is inserted into the Protrusion 1
3a to 13d are attached to the key peak 84 of the key 8 and the second group of disks 3
4, the edge 23 of the key insertion hole 22 hits against the side end surface 85 of the key plate 81 and is pressed, and
34 move in the radial direction, the first engagement protrusion 11P and the disk engagement grooves 14A and 14B are disengaged, and the inner cylinder 2 can be rotated. At this time, the leg 4 of the sidebar 41
3 and the concave portions 45 of the disks 30 to 34 are aligned.

Next, when the key 8 is rotated in the opening direction a, the engagement of the engagement head 42 of the side bar 41 is caused by the rotation of the inner cylinder 2.
Escapes from the sidebar engaging groove 46 and rides on the inner peripheral surface of the outer cylinder 3, and the leg 43 of the sidebar 41
It enters the concave portions 45 of 0 to 34 (FIGS. 9 and 12).
The latch operating mechanism 70 moves the key 8 90 degrees in the opening direction a.
The operation starts after being rotated by 180 degrees, and when it is rotated by 180 degrees, the latch is completely out of the receiving bracket (not shown).

On the other hand, when the lock body 1 is in the "unlocked state",
After the key 8 is inserted into the keyhole 5 and rotated 180 degrees in the closing direction b, when the key 8 is removed from the keyhole 5, a "locked state" is set. The latch operating mechanism 70 starts operating after the key 8 is rotated 90 degrees in the closing direction b, and when the key 8 is rotated 180 degrees, the latch enters the receiving bracket (FIG. Not shown).

When the lock body 1 is in the "locked state", when an elongated rod-shaped tool is inserted into the lock body 1 through the keyhole 5 and each of the discs 30 to 34 is hooked to perform "picking", For the two groups of disks 34, the key insertion holes 2
Since there is no projection at the edge of the hole 2, the disk 34 cannot be hooked and moved, and unauthorized unlocking is difficult.

When the inner cylinder 2 is rotated in a state where the engagement between the first engaging projections 11P of the disks 30 to 34 and the disk engaging grooves 14A and 14B is not sufficiently disengaged. Since the side bar 41 is pushed and the meshing portion 61 at the tip of the leg portion 43 meshes with the meshing portion 62 of each of the discs 30 to 34, the radial movement of each of the discs 30 to 34 is prevented, and the first engagement is performed. Convex part 11P and disk engaging groove 14A, 1
4B is not completely disengaged and "picking" is very difficult.

[0040]

According to the present invention, since a plurality of disks include a disk having no key insertion hole provided with a projection, it is difficult to move the disk by hooking it with a rod-shaped tool. Unauthorized unlocking called "picking" can be prevented.

According to the second aspect of the present invention, a meshing portion is formed at a portion where each disk and the side bar face each other.
Unauthorized unlocking called "picking" becomes more difficult.

[Brief description of the drawings]

FIG. 1 is a front view showing the appearance of a lock body according to an embodiment of the present invention.

FIG. 2 is a side view showing the appearance of the lock body according to one embodiment of the present invention.

FIG. 3 is a perspective view showing an appearance of a key.

FIG. 4 is a sectional view taken along line AA of FIG. 1 in a “locked state”.

FIG. 5 is a view showing “locked state” and “unlocked state”.
It is sectional drawing which follows the BB line of FIG.

FIG. 6 is a sectional view taken along line AA of FIG. 1 in an “unlocked state”;

FIG. 7 is a cross-sectional view taken along the line CC of FIG. 5 in a “locked state”;

FIG. 8 is a cross-sectional view taken along line CC of FIG. 5 in an “unlocked state”.

FIG. 9 is a cross-sectional view taken along the line CC of FIG. 5 when the inner cylinder is rotated.

FIG. 10 is a sectional view taken along line DD in FIG. 5 in a “locked state”;

FIG. 11 is a cross-sectional view taken along the line DD in FIG. 5 in an “unlocked state”;

FIG. 12 is a cross-sectional view taken along the line DD of FIG. 5 during the rotation operation of the inner cylinder.

FIG. 13 is a front view showing the appearance of the first group of disks.

FIG. 14 is a front view showing the appearance of a second group of disks.

FIG. 15 is a longitudinal sectional view showing a side bar.

FIG. 16 is a bottom view showing the side bar.

FIG. 17 is an enlarged sectional view showing a configuration of a meshing portion.

FIG. 18 is a perspective view showing the appearance of a conventional key.

FIG. 19 is a sectional view showing the structure of a conventional disk lock device.

FIG. 20 is a sectional view showing the structure of another conventional disk lock device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lock main body 2 Inner cylinder 3 Outer cylinder 8 Key 12 Key insertion hole 13a-13d Projection 14A, 14B Disk engaging groove 15 Spring 22 Key insertion hole 30-33 First group disk 34 Second group disk 41 Sidebar 46 Side bar engaging groove 50 Spring 61 Meshing portion 62 Meshing portion 83 Depressed groove 84 Key mountain 85 Side end face

Claims (2)

[Claims] 1. A key having a key ridge formed in a concave groove along a length direction of a side surface of a key plate, and a lock body which is unlocked or locked in accordance with insertion and removal of the key. The inner cylinder rotatably supported in the outer cylinder, a plurality of disks engaged and disengaged from the disk engagement groove on the inner surface of the outer cylinder by reciprocation in the radial direction, and each disk is moved in the direction of the disk engagement groove. A disc lock device comprising a plurality of springs for pressing the discs, wherein each disc has a key insertion hole formed in the plate surface, and the first group of discs has a key groove formed in the edge of the key insertion hole. The second group of discs has a key insertion hole, which has a projection inserted into the key engaging hole of the key and is pressed in the radial direction so as to be disengaged from the disc engaging groove. The key insertion hole is pressed against the side edge of the keyboard in the radial direction. Disk lock apparatus that engagement with the disk engaging groove deviates by being. 2. A key having a key ridge formed in a concave groove along a length direction of a side surface of a key plate, and a lock body which is unlocked or locked in accordance with insertion and removal of the key. The inner cylinder rotatably supported in the outer cylinder, a plurality of disks engaged and disengaged from the disk engagement groove on the inner surface of the outer cylinder by reciprocation in the radial direction, and each disk is moved in the direction of the disk engagement groove. A plurality of springs are provided to press the side bar between the outer cylinder and the inner cylinder. A spring is provided for pressing in the direction of the sidebar engaging groove, and each disk regulates a radial movement of the sidebar in a state where the disk is engaged with the disk engaging groove, and the disk is engaged with the disk. Allows the sidebar to move in the radial direction when disengaged from the mating groove In the disk lock device formed as described above, each disk is provided with a key insertion hole on a plate surface, and the first group of disks has a projection that enters a groove of a key at a hole edge of the key insertion hole, The projections are pressed against the key ridges of the key and pressed radially to release the engagement with the disc engagement grooves, while the second group of discs has a key insertion hole formed in a shape without projections, When the edge of the key insertion hole hits the side end surface of the key plate and is pressed in the radial direction, the engagement with the disk engaging groove is released, and the portion where each disk and the side bar face each other has a side bar. A disk lock device in which a meshing portion is formed by displacing the gear in the direction of the disk.