JP3143401B2 - Disk lock device - Google Patents

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 used for various purposes such as a vending machine, an automatic teller machine, a safe, a locker for rent, and the like. The present invention relates to a disk lock device having a function of preventing a disk lock.

[0002]

2. Description of the Related Art As a conventional disk lock device, a key in which a plurality of key ridges having different heights are arranged along a longitudinal direction, and a locking piece is rotated by inserting the key and rotating the key forward and backward. There is one that is configured by a combination with a lock body that performs locking and unlocking operations (Japanese Patent Application Laid-Open No. 62-63782). The lock body has an inner cylinder rotatably disposed inside an outer cylinder, and a plurality of disks and a lock rod for setting each state of locking and unlocking are loaded inside the inner cylinder. I have.

The outer cylinder has a lock rod engaging groove on the inner peripheral surface thereof.
Further, slits are provided in the inner cylinder, and concave portions are formed at different angles on the outer peripheral edge of each disk. At the time of locking, the concave portions of each disk are not aligned, and the lock bar is pushed up by the outer peripheral edge of each disk to be positioned between the engagement groove of the outer cylinder and the slit of the inner cylinder. Regulations.

The key operation for unlocking includes an idle rotation operation for releasing the lock of the inner cylinder by the lock rod and a main operation for rotating the latching piece together with the key operation after the release of the lock. First, when the key is inserted into the lock main body and the idle rotation operation is performed, each disk is sequentially hooked on the key pile of the key and sequentially rotates. As a result, when the concave portions of each disk are aligned, the lock bar falls down into the aligned concave portions and the engagement with the engagement groove of the outer cylinder is released. As a result, the inner cylinder is released from the restraint by the outer cylinder, and thereafter, the operation can be shifted to this operation.

However, in the disk lock device having the above structure, since the inner cylinder is loaded in the outer cylinder, and a plurality of disks are loaded in the inner cylinder, the internal structure becomes complicated, and the assembling is troublesome. And the production cost is high. Moreover, since the discs are sequentially rotated so that the recesses are aligned, the rotation angle for the idle rotation operation becomes large, resulting in poor operability, and even when an incorrect key is used, the idle rotation operation is not performed. Since the key can be turned only by the rotation angle, there is a possibility that the key being used may be mistaken as a proper key.

Therefore, the inventor of the present invention eliminates the inner cylinder and directly loads a plurality of disks and lock rods for setting each state of locking and unlocking inside the cylindrical case of the lock body. At the same time, a disk lock device has been proposed in which a lock plate for engaging and disengaging the lock bar is provided outside the disks at both ends in a state where rotation is restricted (Japanese Patent Application No. 5-31).
No. 5911). In each of the disks, a support groove for supporting the lock rod and a concave portion in which the lock rod falls down are continuously formed at the same angular position on the outer peripheral edge. A step according to the height is formed.

In this disk lock device, when locking, the support grooves and recesses of all the disks are aligned, and the lock rod is located in the support groove of each disk and engages with the lock plate to lock each disk. It regulates the rotation of the disk. When the proper key is inserted into the lock body and the idle rotation operation is performed, at the predetermined angular position, each key peak simultaneously hits the corresponding step of the disk, and then all the steps are hooked at once and all the disks are Rotate all at once. By this pivoting operation, the support groove and the concave portion move while maintaining the aligned state, and when the concave portion reaches the position of the lock bar, the lock bar falls into the concave portion of each disk and is disengaged from the lock plate. As a result, each disk can be rotated together with the lock bar, and thereafter, the operation can be shifted to the main operation.

[0008]

However, in the above disk lock device, the locked state of the disks is released only by rotating all the disks in the same direction by the same angle, so that a wire-like tool is inserted through the keyhole. Unauthorized unlocking (hereinafter, this is referred to as "picking") may be performed by rotating each disk individually.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a disk lock device having a high picking preventing effect by providing at least one picking preventing disk in addition to a normal disk. With the goal. Another object of the present invention is to provide a disk lock device having a master key capable of unlocking all locks having a picking prevention structure in case of an accident such as loss of a key. Is to do.

[0010]

According to the disk lock device of the present invention, a key having different heights is provided in a plurality of rows along a longitudinal direction, and the key is inserted by inserting the key and rotating the key in the forward and reverse directions. It consists of a combination with a lock main body that performs locking and unlocking operations by reciprocating a stopper piece. The lock body includes a plurality of drive first disks and at least one picking disk, which are rotatably arranged inside the cylindrical case by a number corresponding to the number of key ridges of the key in the length direction. A second disk for prevention, a lock rod arranged orthogonally to each of the disks, and at least one lock plate arranged in an arrangement of the disks with rotation restricted. The first disk has a key insertion hole formed in a plate surface, and a step portion at which a corresponding key peak of the key is hooked is formed at the same angular position, and a groove width corresponding to a diameter of the lock rod is formed on an outer peripheral edge. A support groove of a lock rod having a groove depth and a groove deeper than the groove depth of the support groove for rolling down the lock rod in the support groove are continuously formed at the same angular position. In the second disk, a notch in which a key ridge corresponding to the key is not caught is inserted into a key insertion hole formed in the plate surface.
The concave portion is formed in an angular range larger than the angular position of the step portion of the disk, and the outer peripheral edge has the concave portion at an angular position corresponding to the support groove of the first disk, and the angular position corresponding to the concave portion of the first disk. The support grooves are respectively formed.
The lock plate is engaged with the lock bar when the lock bar is supported by the support groove of the first disk,
A lock groove is formed that is disengaged from the lock bar when the lock bar falls into the concave portion of each of the first and second disks.

According to a second aspect of the present invention, there is provided a disk lock device comprising: a key in which a plurality of key ridges having different heights are arranged along a length direction; a master key having a key ridge higher than any of the key ridges; It consists of a combination with a lock main body that performs locking and unlocking operations by reciprocating the latching piece by inserting a key or a master key and performing a forward / reverse rotation operation. The lock body includes a plurality of drive first disks and at least one picking disk, which are rotatably arranged inside the cylindrical case by a number corresponding to the number of key ridges of the key in the length direction. A second disk for prevention, a lock rod arranged orthogonally to each of the disks, and at least one lock plate arranged in an arrangement of the disks with rotation restricted. The first disc has a first step portion at which a corresponding key ridge of a key is hooked into a key insertion hole formed on a plate surface, and a second key portion at which a corresponding key ridge of a master key is hooked at the same angular position.
Are formed at angular positions smaller than the first step, and at the outer peripheral edge, a support groove for the lock rod having a groove width and a groove depth corresponding to a diameter of the lock rod; A recess deeper than the groove depth of the support groove for rolling down the lock rod in the groove is formed continuously at the same angular position. In the second disk, a notch in which the corresponding key ridge of the key and the master key is not caught is formed in a key insertion hole formed in the plate surface in an angle range larger than the angular position of the first step of the first disk. The recess is formed on the outer peripheral edge at an angular position corresponding to the support groove of the first disk, and the support groove is formed at an angular position corresponding to the recess of the first disk. In the lock plate,
The lock bar engages with the lock bar when the lock bar is supported by the support groove of the first disk, and engages with the lock bar when the lock bar falls into the concave portion of each of the first and second disks. Is formed.

[0012]

When locking, all the first disks have support grooves and recesses aligned in a line, and the second disk has recesses in the support grooves of the first disk, support grooves in the recesses of the first disk,
Correspondingly, the locking bar is located in the support groove of the first disk and above the recess of the second disk. When a proper key is inserted and rotated by a predetermined angle, each key peak simultaneously hits the corresponding step of the first disk, and thereafter, the steps are simultaneously hooked and all the first disks are simultaneously held. Rotate. At this stage, the key ridge corresponding to the second disk is located in the notch, does not catch on the second disk, and the second disk does not rotate. By the rotation operation, the support groove and the concave portion of the first disk move while maintaining the aligned state, and when the concave portion reaches the position of the lock bar, the concave portion of the first disk and the concave portion of the second disk are moved. Are lined up in a row,
The second discs fall into the recesses of the respective second discs and are disengaged from the lock plate, and the first and second discs are integrated via the lock rod. When the lock bar and the lock plate are disengaged from each other, the key can be further turned. By this turning operation, the first and the second lock rods fall into the recesses.
The second disks are simultaneously rotated, and the disk lock device is unlocked. If all the discs are rotated by a predetermined angle in the same direction by using a wire-shaped tool for picking, the concave portion is located at the position corresponding to the lock bar for the first disk, but is not provided for the second disk. Since the support groove is located at the position corresponding to the lock rod, the lock rod and the lock plate are not disengaged from each other.

In the disk lock device according to the second aspect of the present invention, when an appropriate key is inserted and unlocked, each key peak is simultaneously placed on the corresponding first step portion of the first disk at a predetermined angular position. As a result, the first discs are simultaneously rotated and the lock bar and the lock plate are disengaged. When the master key is inserted and unlocked, each key is simultaneously caught on the second step of the corresponding first disk at a smaller angular position than when the proper key is used, and the first disk is locked. The lock rod and the lock plate are disengaged from each other by simultaneous rotation. When the lock rod is disengaged from the lock plate, the key can be further rotated, and the first and second disks can be simultaneously rotated in a state where the lock rod falls into the recess. The disk lock device is unlocked.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk lock device according to the present invention comprises a lock main body, a key unique to the lock main body that can be unlocked only by adapting to the lock main body, and a common master that can unlock a plurality of lock main bodies having different keys. As an example, FIG. 4 shows the appearance of the key 2, FIG. 5 shows the appearance of the master key 60, and FIGS. 1 to 3 and 6 to 23 show the internal structure of the lock body 1. In addition, each configuration is shown.

The key 2 shown in FIG. 4 has a tabular shape with a large width and a key piece 4 having a width smaller than that of the knob 3 and corresponding to the entire length of the lock body 1. Are integrally formed. The key piece 4 has a distal end portion 5 having a rectangular planar shape. When the key 2 is inserted into the lock main body 1, the distal end portion 5 abuts against a driving plate 16, which will be described later, and an engagement hole 44 is formed.
Engages.

A plurality of rows of key ridges 6a, 6b, 6c having different heights are provided on both sides of the key strip 4 along the length direction. A stepped portion 7 corresponding to the front plate 9 of the main body 1 is formed. The key mountain 6
a, 6b, and 6c, the key mountain 6a is the highest, and the key mountain 6b
The key mountain 6c is the second lowest. FIG. 1 shows an example in which the height of the key hill is set to three levels for ease of explanation, but if the number of levels is further increased, more key differences can be set. Each key ridge 6a, 6b, 6c corresponds to a first disk 50a to 50c and a second disk 51 described later.

The master key 60 shown in FIG. 5, like the key 2 shown in FIG.
1 and the width of the lock body 1
And a key piece 62 having a length corresponding to the entire length of the key. The key piece 62 has a distal end portion 63 having a rectangular planar shape. When the master key 60 is inserted into the lock main body 1, the distal end portion 63 abuts against a driving plate 16, which will be described later, and engages with the engagement hole 44. Combine.

When the master key 60 is inserted into the lock body 1, the first disk 50a
The highest key hill 6 of the key 2 at a position corresponding to
A key hill 64 having a height equal to the lowest key hill 6c is located at a position corresponding to the second disk 51 again.
Are arranged in the length direction.

In the drawing, reference numeral 66 denotes a stepped portion formed near the knob 61 of the key piece 62, which is set at the same height as the stepped portion 7 of the key 2, and which holds the master key 60 in the lock body. When it is inserted into the lock body 1, it is located at a position corresponding to the front plate 9 of the lock body 1. In this embodiment, the stepped portion 66 and the higher key ridge 64 are formed at the same height, and the stepped portion 66 and the key ridge 64 are formed in a series. No, key mountain 6
By setting the height of 4 to be lower than the stepped portion 66, the stepped portion 66 may be formed in a step-like shape like the stepped portion 7 of the key 2.

FIGS. 1 to 3 show the internal structure of the lock body 1, and include a cylindrical case 8, a front plate 9, a rear plate 10, a plurality of first disks 50a to 50c, and a second disk 51. , A plurality of lock plates 12 used as partition plates,
It is composed of a lock bar 13, a drive plate 16, and the like.

1 to 3, FIG. 1 shows the internal state of the lock body 1 when the lock is locked, FIG. 2 shows the internal state of the lock body 1 when the lock is released, and FIG. Body 1
Are shown as longitudinal sectional views, respectively.
6 to 8 and FIGS. 10 to 12 show the internal state of the lock body 1 in the process from locking to unlocking, and FIGS.
13 and FIG. 13 show the internal state of the lock body 1 at the time of unlocking, respectively, in a cross section in a direction orthogonal to the cross section direction of FIGS. 1 to 3, and in particular, FIGS. 10 to 12 show the relationship between the disk 50a and the lock bar 13, and the relationship between the second disk 51 and the lock bar 13 respectively.

The cylindrical case 8 is a cylindrical body whose both ends are open, and has a support groove 17 formed at a predetermined angular position on the inner peripheral surface in the length direction over substantially the entire length. This support groove 17
Is for engaging a projection 18 provided on each lock plate 12 to be described later and fixing each lock plate 12 in a non-rotating state.

The front plate 9 comprises an end plate 20 fitted and fixed to the front opening of the cylindrical case 8 and a movable plate 21 rotatably connected to the inner surface of the end plate 20. so,
FIG. 15 shows the appearance of the end plate 20, and FIG.
1 are shown respectively.

A fitting hole 22 having a diameter corresponding to the width of the stepped portion 7, 66 of the key 4 and the master key 60 is formed in the center of the plate surface of the end plate 20. On the side surface on the side of the end plate 20, a fitting protrusion 25 is provided so as to be fitted into the fitting hole 22 so as to be pivotable. The fitting projection 25 has a rectangular keyhole 23 formed along the diameter line, and the key 2 or the master key 60 is inserted into the keyhole 23 so that the stepped portions 7 and 66 are 23, and the key 2 or the master key 60 is rotated.

The rear plate 10 is fitted and fixed to the rear opening of the cylindrical case 8, and a bearing hole 26 is formed at the center of the plate surface as shown in FIG. The bearing hole 26 is provided in the drive plate 1.
A drive shaft 27 that rotates together with the drive shaft 6 is rotatably supported, and a hook piece 28 is attached to the tip of the drive shaft 27. The latching piece 28 is disengaged from the fixed-side metal fitting and the like by forward and reverse rotation.

The driving plate 16 is, as shown in FIG.
In the center of the plate surface, the tip 5 of the key 2 and the master key 60,
An engagement hole 44 into which the lock rod 63 is inserted is formed, and a U-shaped groove 31 for supporting the lock bar 13 is cut out on the outer peripheral edge. The U-shaped groove 31 is formed at a depth approximately twice the diameter of the lock rod 13.

The engaging hole 44 has contact edges 33S and 33E forming a predetermined angle θ. When the key 2 or the master key 60 is inserted in the locked state shown in FIGS.
3 is in contact with one contact edge 33S of the engagement hole 44. Key 2
Alternatively, while the master key 60 rotates in the unlocking direction B by the angle θ, the tips 5, 63 idle in the engagement hole 44, and when the state shown in FIGS. 5 and 63 hit the other hitting edge 33E, and thereafter rotate the driving plate 16 integrally.

Next, the first disks 50a to 50c
Has a diameter substantially corresponding to the inner diameter of the cylindrical case 8, and the disk 50 a is
0b is arranged in the lock body 1 so as to correspond to the next highest key hill 6b, and the disk 50c is arranged to correspond to the lowest key hill 6c. As shown in FIGS. 19 to 21, the key pieces 4 and 6 are provided at the center of the plate surface of each of the first disks 50a to 50c.
2, a key insertion hole 34 capable of insertion and removal is provided. Each key insertion hole 34 has a hole side edge located in the locking direction A of the key 2 and the master key 60 as a contact edge 35 for a return operation, and a hole side edge facing the contact edge 35, that is, an unlocking direction B Key holes 6 corresponding to the key 2
The first step portions 36a to 36c where the a to 6c are hooked are at the same angular position α as viewed from the center of the key insertion hole 34, and the second step portion 30 where the higher key peak 64 of the master key 60 is hooked is An interval slightly larger than the thickness of the key 2 and the master key 60 is provided at a position facing the contact edge 35, respectively. In this embodiment, when the master key 60 is inserted into the key insertion hole 34 and rotated, the key peak 64 corresponding to each of the first disks 50a to 50c is immediately caught on the second step portion 30. , The second step 3
Although the angle position of 0 is set, the present invention is not limited to this, and the second step portion 30 may be formed at an angle position smaller than the angle position α of the first step portions 36a to 36c.

Further, all the first disks 50a to 50c
A support groove 37 for supporting the lock rod 13
Is formed. The support groove 37 has a depth corresponding to the diameter of the lock bar 13, and when locked, the lock bar 13 is supported in a series of support grooves 37 aligned in a row. Each support groove 37
A recess 39 having a depth approximately twice as large as the diameter of the lock bar 13 is continuously formed adjacent to the lock rod 13.

The second disk 51 is provided at least one (two in this embodiment) in the lock body 1.
It has the same diameter and thickness as the first disks 50a to 50c, and as shown in FIG.
A key insertion hole 34 through which the key can be inserted is provided. The key insertion hole 34 has a hole side edge located in the locking direction A of the key 2 and the master key 60 as a contact edge 35 for the returning operation, and a hole side edge located in the unlocking direction B corresponds to the key 2. The notch 32 having a height at which the key hill (in this embodiment, the lowest key hill 6c) is not caught is formed by the first disk 50a to 50c.
Are formed in an angle range β larger than the angular position α of the stepped portions 36a to 36c.

On the outer peripheral edge of each of the second disks 51,
The concave portions 39 of the first disks 50a to 50c are positioned at angular positions corresponding to the support grooves 37 of the first disks 50a to 50c.
A recess 39 'having the same configuration as that of the first disk 50
Support grooves 37 ′ having the same configuration as the support grooves 37 of the first disks 50 a to 50 c are formed continuously at angular positions corresponding to the recesses 39 a to 50 c. The second disk 51 is provided at the same position in the cylindrical case 8 for the plurality of lock bodies 1 sharing the master key 60.

At the time of locking, all the first disks 50a to 50a
0c support groove 37 and recess 39 are aligned in a line,
The support groove 37 'of the second disk 51 is
The recesses 39 'of the second disc 51 are provided in the recesses 39a of the first discs 50a to 50c.
, Respectively. In this state, the proper key 2
Is inserted and turned, first, all the first disks 50
A to 50c rotate while maintaining the state in which the support grooves 37 and the concave portions 39 are aligned in a line, and the concave portions 39 and the concave portions 39 'of the second disk 51 are aligned. At this time,
The lock bar 13 falls into the series of concave portions 39, 39 '.

The lock rod 13 is a round shaft slightly shorter than the length of the cylindrical case 8, and the first and second discs 50 a to 50 c, 5 are located at the inner peripheral position of the cylindrical case 8.
1 and are supported on the support grooves 37 of the first disks 50a to 50c in the locked state,
It is located on the recess 39 ′ of the second disk 51.

A ring-shaped lock plate 12 as shown in FIG. 23 is interposed between adjacent disks 50a to 50c, 51 so that each disk does not come into surface contact with the adjacent disk. Each lock plate 12 has an outer diameter substantially matching the inner diameter of the cylindrical case 8 and an inner diameter slightly larger than the maximum width of the key piece 62 of the master key 60. A projection 18 for engaging with the support groove 17 and fixing the lock plate 12 so as not to rotate is integrally formed with the projection 18, and is located at a position opposed to the projection 18 according to the vertical movement of the lock bar 13. Lock groove 4 to be disengaged
1 is formed. A guide side 42 of the lock bar 13 is formed on the inner peripheral edge of the ring that continues from one of the groove side edges of the lock groove 41, and the lock bar 13 is provided on the other groove side edge of the lock groove 41 in the direction of the guide side 42. An inclined guide edge 43 is formed for guiding.

When the lock rod 13 is locked and is supported in the support groove 37 of the first disks 50a to 50c, it is engaged in the lock groove 41, and the lock rod 13 is in the first position. When it falls into the recesses 39, 39 'of the second discs 50a to 50c, 51, the engagement with the lock groove 41 is released, and the lock bar 13 is moved in the direction of the guide side 42 by the guide edge 43. After being extruded, the recess 39,
Guide side 4 while being bound between 39 'and guide side 42
Move along 2.

FIG. 24 shows another embodiment of the second disk 51, and FIG. 25 shows the second disk 51 of FIG.
1 shows an embodiment of a master key 60 used in a disk lock device having a key. The second disk 51 shown in FIG. 24 has a key insertion hole 34 in the center of the plate surface, through which the key pieces 4 and 62 of the key 2 and the master key 60 can be inserted and removed, and a pair of arc-shaped notches 32 and 3.
2 are opened in a substantially S-shape. The key insertion hole 34 has a hole side edge located in the locking direction A of the key 2 and the master key 60 as a contact edge 35 for a return operation, and extends along the unlocking direction B from the upper and lower portions of the key insertion hole 34. , The notches 32 are respectively provided with the first disks 50a-5
0c is formed in an angle range β larger than the angular position α of the first stepped portions 36a to 36c. In the figure, reference numeral 45 denotes a projection formed between the key insertion hole 34 and the notch 32.

The master key 60 shown in FIG.
In a position corresponding to the second disk 51, a rectangular opening 67a having a width slightly larger than the thickness of the second disk 51 is provided.
And the upper and lower portions are engaged with the engaging portions 67b, 67b.
And that. When the master key 60 is inserted through the keyhole 23 of the lock body 1 and rotated in the unlocking direction B, the upper and lower engaging portions 67b, 67b
The master key 60 does not get caught on the second disk 51 because the projections 45, 45 of the second disk 51 enter the openings 67 a while engaging in the insides 2, 32.

Next, the operation of the disk lock device having the above configuration will be described with reference to FIGS. 1 to 3, FIGS. 6 to 9, and FIGS. 6 to 9 show the first disk 5
The relationship between the first step portion 36a of the first disk 50a and the key 2 is shown, but the step portions 36b of the other first disks 50b and 50c are shown.
The same applies to the relationship with 36c, which is omitted here. 10 to 13 show the relationship between the notch 32 of the second disk 51 and the key 2.

At the time of locking shown in FIGS. 1, 6, and 10,
The support grooves 37 and the concave portions 39 of the first disks 50a to 50c are aligned, and the concave portions 39 'of the second disk 51 have the concave portions 39' of the support grooves 3 of the first disks 50a to 50c.
7, the support grooves 37 'are respectively located in the concave portions 39 of the first disks 50a to 50c. At this time, the lock rod 13 is supported in the support groove 37 of each of the first disks 50a to 50c and above the concave portion 39 'of the second disk 51, and the lock groove of the lock plate 12 between the disks. 41 are engaged. Also each disk 5
In the key insertion holes 34 of 0a to 50c and 51, the contact edges 35 for the return operation are aligned, so that the key 2 can be inserted.

When the appropriate key 2 is inserted through the key hole 23 of the front panel 9, the key piece 4 is inserted into the first and second disks 50a.
The leading end 5 of the key 2 abuts against the drive plate 16 and is located in the engagement hole 44. At this time, the stepped portion 7 of the key 2 is exactly fitted into the key hole 23 of the movable plate 21, and the key 2 has the tip 5 and the stepped portion 7 formed by the engagement hole 44 and the key hole 23. The lock body 1 is held, and a straight insertion state along the axial direction of the lock body 1 is maintained during the rotation operation.

Next, when the key 2 is rotated to the above-mentioned angular position α, the highest one of the key peaks 6a to 6c of the key 2 as shown in FIG. The key ridge 6b which abuts against the first step 36a of the disk 50a and has an intermediate height corresponds to the first step 36b of the corresponding first disk 50b, and the lowest key ridge 6c corresponds to the corresponding first Each of them abuts against the first step portion 36c of the disk 50c.

At this time, the notch 32 of the second disk 51
Is formed in an angle range β larger than the angle position α of the first step portions 36a to 36c, so that the corresponding key peak 6c of the key 2 enters the notch 32 as shown in FIG. Idle.

When the key 2 is further rotated by a predetermined angle (when this angle is γ, γ = β−α), the key hills 6a to 6c
Are the steps 36a of the corresponding first disks 50a to 50c.
To 36c, and all the first disks 50a to 50c
0c are rotated simultaneously, and the first disks 50a to 50c
The support groove 37 and the concave portion 39 move toward the lock bar 13 while maintaining the aligned state. In this case, key 2 is the second
The second disk 51 does not rotate only with the idle rotation of the disk 51. The lock rod 13 is provided on each lock plate 1.
The slides are slid on the support grooves 37 of the first disks 50a to 50c arranged in a row while being positioned in the second lock grooves 41. First disks 50a to 50c aligned in a line
When the concave portion 39 of the lock member 13 reaches the angular position of the lock rod 13,
The concave portions 39 of all the first disks 50a to 50c and the second
The concave portion 39 'of the disk 51 is aligned with the lock bar 13 in a line, and as shown in FIGS. 2, 8, and 12, the lock bar 13 is attached to each of the disks 50a to 50c, 51.
Of each lock plate 12 is disengaged from the lock groove 41, and is guided in the direction of the guide side 42. At this stage, as shown in FIG. 12, the corresponding key hill 6 of the key 2 is provided at the terminal edge of the notch 32 of the second disk 51.
c contacts.

When the key 2 is further rotated, as shown in FIGS. 3, 9, and 13, the lock rod 13 is
The first and second discs 5 are lowered to 9, 39 '.
It rotates together with Oa-50c, 51 and moves along the guide side 42 of each lock plate 12.

By the way, until the lock rod 13 and the lock groove 41 are disengaged, the tip 5 of the key 2 is
, The drive plate 16 does not rotate, and the latch piece 28 does not operate. Key 2 is in angular position β
When the lock lever 13 is rotated to the point where the lock rod 13 and the lock groove 41 are disengaged from each other, the tip 5 of the key 2 comes into contact with the contact edge 33E of the engagement hole 44. Then, the latch piece 28 operates.

If all of the disks 50a to 50c and 51 are rotated by a predetermined angle γ in the same direction using a wire-like tool for picking, the first disk 5
For 0a to 50c, the concave portion 39 reaches the angular position of the lock bar 13, but for the second disk 51, the position of the concave portion 39 'is shifted, and the support groove 37' is positioned corresponding to the lock bar 13. For this reason, the lock rod 13 is located in the support groove 37 ′ of the second disk 51 and the first disk 50.
Positioned above the recesses 39a to 50c, the lock plate 12 is supported in the lock groove 41 of the lock plate 12 in an engaged state, and the locked state is maintained.

Next, when the appropriate key 2 is rotated in the locking direction A, the key piece 4 is moved to the first and second disks 50a to 50c, 5c.
After rotating inside the key insertion hole 34 by the angle α,
a, 6b, and 6c hook the contact edge 35 for the return operation of the first disks 50a to 50c, and the first disks 50a
To 50c are simultaneously rotated. In this case, the first and second disks 50a to 50c, 51 are provided with the concave portions 39, 39 '.
The second disk 51 is also integrated with the first disks 50a to 50
Cooperates with c. Further, since the lock bar 13 is restrained in the recesses 39, 39 'by the guide side 42 of each lock plate 12, it rotates integrally with the first and second disks 50a to 50c, 51. Further, since the lock bar 13 is engaged with the U-shaped groove 31, the drive plate 16 also has the first and second discs 50.
a to 50c and 51 are integrally rotated, and the latch piece 28 operates in the opposite direction.

When the lock rod 13 reaches the position of the lock groove 41 of each lock plate 12, the restraint by the guide side 42 is released, so that the lock rod 13 can escape into the lock groove 41. On the other hand, the key piles 6a, 6b, 6c of the key 2
Is caught on the contact edge 35 for the return operation of all the first disks 50a to 50c, so that the first and second disks 50a to 50c, 51 continue to rotate, whereby the lock rod 13 Riding on the support groove 37 of each of the first disks 50a to 50c and engaging in the lock groove 41,
All the first and second disks 50a to 50c, 51 return to the original locked position.

Next, the operation of the lock body 1 using the master key 60 will be described with reference to FIG. FIG. 14 shows the first
The relationship between the second step portion 30 of the first disk 50a and the master key 60 is shown, but the other first disks 50b,
The same applies to the relationship between the second step portion 50c and the second step portion 50c, and is not shown here. The lock body 1 of FIG. 14 is in a locked state similar to that of FIG.
When the master key 60 is inserted from the key hole 23 of the
2 is the first and second disks 50a to 50
The penetrating hole 34 penetrates the key insertion hole 34 along the contact edge 35 for the return operation of Oc and 51, and the front end 63 abuts against the driving plate 16 and is located in the engagement hole 44. At this time, the stepped portion 66 of the master key 60 is exactly fitted in the key hole 23 of the movable plate 21, and the master key 60 is separated from the tip portion 63 and the stepped portion 66 by the engagement hole 44 and the key hole 23. Are held, and during the rotation operation, a straight insertion state along the axial direction of the lock main body 1 is maintained.

Here, when the master key 60 is rotated, the higher key hill 64 of the master key 60 hooks all the second steps 30 of the first disks 50a to 50c.
All the first disks 50a to 50c are rotated at the same time, and the support groove 37 and the concave portion 39 move toward the lock bar 13 while maintaining the aligned state. At this time, the key ridge 65 of the master key 60 corresponding to the second disk 51 only enters the notch 32 of the second disk 51 and idles, and does not catch the second disk 51. The disk 51 does not rotate. The following operation is the same as the rotation operation of the key 2, and the description is omitted here.

[0051]

As described above, according to the present invention, at least one second disk for preventing picking is provided in addition to the plurality of first disks for driving, and all the disks are moved in the same direction by picking. The first and second
Since the recesses of the discs are not arranged in a line at the position of the lock bar, unauthorized unlocking by picking can be reliably prevented.

According to the second aspect of the present invention, since a plurality of lock bodies with different keys can be unlocked and locked by the master key, a picking prevention function can be provided even if an unexpected situation such as loss of the key occurs. You can unlock all the locks you have.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an internal structure of a lock body according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing an internal state of the lock main body at the time of unlocking.

FIG. 3 is a longitudinal sectional view showing an internal state of the lock main body at the time of unlocking.

FIG. 4 is a front view showing the appearance of the key.

FIG. 5 is a front view showing the appearance of the master key.

FIG. 6 is a cross-sectional view showing a relationship between a first disk and a lock bar at the time of locking.

FIG. 7 is a cross-sectional view illustrating a relationship between a first disk and a lock rod during an unlocking operation.

FIG. 8 is a cross-sectional view showing a relationship between a first disk and a lock rod when unlocking is performed.

FIG. 9 is a cross-sectional view showing a relationship between a first disk and a lock rod at the time of unlocking.

FIG. 10 is a cross-sectional view showing a relationship between a second disk and a lock rod at the time of locking.

FIG. 11 is a cross-sectional view illustrating a relationship between a second disk and a lock rod during an unlocking operation.

FIG. 12 is a cross-sectional view showing a relationship between a second disk and a lock rod at the time of unlocking.

FIG. 13 is a cross-sectional view showing a relationship between a second disk and a lock bar at the time of unlocking.

FIG. 14 is a cross-sectional view showing an internal state of the lock main body during an unlocking operation using a master key.

FIG. 15 is a front view showing the appearance of an end plate of the front plate.

FIG. 16 is a front view showing the appearance of the movable plate of the front plate.

FIG. 17 is a front view showing the appearance of a rear plate and a drive plate.

FIG. 18 is a front view showing the appearance of the driving plate.

FIG. 19 is a front view showing the appearance of the first disk.

FIG. 20 is a front view showing the appearance of the first disk.

FIG. 21 is a front view showing the appearance of the first disk.

FIG. 22 is a front view showing the appearance of the second disk.

FIG. 23 is a front view showing the appearance of the lock plate.

FIG. 24 is a front view showing another example of the second disk.

FIG. 25 is a front view of a master key used in the disk lock device having the second disk of FIG. 24;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lock main body 2 Key 6a, 6b, 6c, 64, 65 Key pile 8 Cylindrical case 12 Lock plate 13 Lock rod 16 Drive plate 28 Hook piece 34 Key insertion hole 36a, 36b, 36c First step 30 Second Step 32 Notch 37, 37 'Support groove 39, 39' Recess 41 Lock groove 44 Engagement hole 50a to 50c First disk 51 Second disk 60 Master key

Claims (2)

(57) [Claims] A key in which a plurality of key ridges having different heights are arranged along a length direction, and a locking piece is reciprocated by inserting and reversing a key to lock and unlock the key. In a disk lock device comprising a combination with a lock body to be locked, the lock body is provided in a cylindrical case with a plurality of pieces arranged in a length direction in a length direction corresponding to the number of key ridges of the key so as to be freely rotatable. A first drive disc and at least one second disc for preventing picking, a lock rod arranged orthogonal to each of the discs, and arranged in an arrangement of the discs with rotation restricted. The first disk has at least one lock plate. The first disk has a key insertion hole formed in the plate surface, and a step portion at which a key ridge corresponding to the key is hooked is formed at the same angular position. Equivalent to the diameter of the lock rod The support groove of the lock rod having the groove width and the groove depth, and the concave portion deeper than the groove depth of the support groove for rolling down the lock rod in the support groove are continuously formed at the same angular position. The second disk has a key insertion hole formed in the plate surface, in which a notch in which a corresponding key peak of the key is not caught is formed in an angular range larger than the angular position of the step portion of the first disk. The recess is formed at an angular position corresponding to the support groove of the first disk, and the support groove is formed at an angular position corresponding to the recess of the first disk. The rod engages with the lock rod when the rod is supported by the support groove of the first disk, and disengages from the lock rod when the lock rod falls into the concave portion of each of the first and second disks. Disk locking device having lock groove formed 2. A key in which a plurality of key ridges having different heights are arranged along the length direction, a master key having a key ridge higher than any one of the keys, and insertion or reversal of the key or the master key. A disk lock device comprising a combination with a lock body that performs a locking and unlocking operation by reciprocating a locking piece by a rotating operation of the lock body, wherein the lock body is equivalent to the number of key ridges of the key inside a cylindrical case. A plurality of drive first discs and at least one picking prevention second disc arranged rotatably and arranged in the length direction by the number of sheets to be picked up, and a lock rod orthogonally arranged with each of the discs And at least one lock plate provided in the arrangement of the disks in a state where the rotation is restricted, wherein the first disk has a key insertion hole corresponding to the key inserted in the plate surface. The key mountain is caught The first step portion is formed at the same angular position, and the second step portion at which the corresponding key of the master key is hooked is formed at an angle position smaller than the first step portion. A support groove of a lock rod having a groove width and a groove depth corresponding to a diameter, and a recess deeper than the groove depth of the support groove for rolling down the lock rod in the support groove are respectively continuous at the same angular position. In the second disk, the notch in which the key ridge corresponding to the key and the master key is not caught in the key insertion hole formed in the plate surface is larger than the angular position of the first step of the first disk. The concave portion is formed at an angular range, and the outer peripheral edge is formed with the concave portion at an angular position corresponding to the concave portion of the first disk, and the support groove is formed at an angular position corresponding to the concave portion of the first disk, respectively. The lock plate includes the The lock rod engages with the lock rod when the lock rod is supported by the support groove of the first disk, and engages with the lock rod when the lock rod falls into the concave portion of each of the first and second disks. Disc lock device formed with a lock groove which is released.