JP3313633B2 - Locking 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 lock device used for preventing theft of motorcycles such as bicycles and mini-bikes, and also for security measures such as automobiles and houses. The present invention relates to a technique for preventing illegal unlocking.

[0002]

2. Description of the Related Art Conventionally, there is a so-called horseshoe-type lock device for preventing theft of a motorcycle such as a bicycle. This locking device
It has a horseshoe-shaped (ring-opened) lock body with a part of the ring interrupted and a key that can be attached to and detached from the lock body. One locking ring is provided in the lock body so as to be rotatable. Then, in the horseshoe-type locking device, the locking ring is unlocked by opening the ring opening portion, and the locking ring is locked by closing the ring opening portion. However, this lock device is a so-called single lock type having one locking ring, and has a low anti-theft capability.

[0003] Therefore, the inventors have considered a double lock type horseshoe-shaped lock device 100 as shown in FIG. In this locking device 100, two locking rings are arranged in parallel on a lock body 101, and one locking ring 102 is used for normal locking and the other locking ring 103 is used for emergency locking. It is a lock type lock device. Locking ring 10
When the lock 2 is unlocked (for example, when the user is on a two-wheeled vehicle and both rings do not close the ring opening portion as shown in FIG. 13), the push-type key 104 is attached to the lock main body 101. Accordingly, the locking ring 103 is configured to be forcibly restrained, so that the locking ring 103 never closes the ring opening and enters emergency locking. However, during the locking of the locking ring 102, the forcible restraint on the locking ring 103 is released due to the removal of the push-in key 104, and the locking ring 102 is illegally altered by a falsified or forged unauthorized key. When unlocked, the locking ring 103 immediately jumps out of the lock body 101 to close the ring opening, the locking ring 103 enters emergency locking, and the theft of the two-wheeler is prevented.

[0004]

However, it cannot be said that the double lock type horseshoe-type lock device 100 described above also has a sufficient anti-theft capability. The push-in key 1 is where emergency locking by the locking ring 103 is supposed to take place in the event of theft.
Since 04 has a simple structure, an elaborate forged / falsified key is easily created, and the emergency locking by the locking ring 103 is prevented, so that theft cannot be reliably prevented. Recently, motorcycles are becoming more and more sophisticated, and thefts are causing great damage.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a lock device which can surely prevent a person who is not the proper owner of the lock device (such as a thief) from unlocking the lock device illegally with an unauthorized key. And

[0006]

According to a first aspect of the present invention, there is provided a lock device, comprising: a lock body having an open ring shape; a key detachable from the lock body; A lock ring housed inside the lock body so as to be rotatable in both forward and reverse directions along a circumferential direction on a path passing through the ring opening portion of the lock body, and the lock ring closes the ring opening portion The locking device is configured such that the locking ring is unlocked by opening a ring opening portion of the locking device, wherein the key is a cylinder lock-type key, and the locking ring is a normal locking device. A first locking ring and a second locking ring for emergency locking
A first ring urging means for urging the first locking ring in the unlocking direction, a second ring urging means for urging the second locking ring in the locking direction, and a first ring urging means.
First ring restricting means for maintaining the locked state of the first locking ring against the unlocking force of the ring urging means;
A second ring restricting means for maintaining an unlocked state of the second locking ring against a locking urging force of the ring urging means; and a cylinder lock means for turning the key by inserting the key. The cylinder lock means includes a first key stop stage in which a key inserted without applying a pressing force abuts and stops along a key entry direction, and a key inserted with a pressing force abuts. First stop
A second key suspension stage ahead of the key suspension stage is set. In the first key suspension stage, only a turning operation in one direction with respect to the key is allowed, and in the second key suspension stage, the key is operated in the other direction with respect to the key. Is also permitted, and the turning operation in one direction releases the unlocking of the second locking ring by the second ring restricting means, and the first locking by the first ring restricting means is performed by the turning operation in the other direction. It is configured so that the locking of the use ring is released.

According to a second aspect of the present invention, in the lock device according to the first aspect, a first locking ring is provided on the first locking ring.
A recess is provided, and a second locking ring has a second locking ring.
A recess is provided, the first ring restricting means has a first locking piece that enters and locks into the first recess to maintain the locked state of the first locking ring, and the second ring restricting means has Second
A second locking piece that enters and locks into the recess to maintain the unlocked state of the second locking ring, and the cylinder lock means has a rotating body that is rotated by turning the inserted key. A first driving piece that moves along with the turning operation of the key in the other direction to release the locking between the first recessed portion and the first locking piece; A second drive piece that moves with the turning operation of the lock member and releases the lock between the second concave portion and the second lock piece is provided, and the cylinder lock means includes an outer periphery of the rotating body. And a ratchet engaging with the ratchet teeth at a position corresponding to the first key stop stage so as to permit only one-direction turning operation of the key. With the key inserted with pressure, DOO teeth are configured to disengage the engagement of the ratchet teeth and pawl piece moves to the other party.

[0008]

Next, the locking operation of the lock device according to the present invention,
The unlocking action will be described. First, the locking / unlocking action of the first locking ring for normal locking in the lock device of the first aspect will be described. When the restriction by the first ring restricting means is released and the first ring urging means moves in the unlocking direction and shifts the unlocked first locking ring to the locked state, the first ring urging means is turned on. If the first locking ring is manually and forcibly moved in a direction to close the ring opening portion against the force to a position where the first ring restricting means restricts, the locked state is changed by the first ring restricting means. Once maintained, the locking device enters normal locking. Normally, at least during normal locking, the key is removed from the lock body and carried by the owner.

When unlocking the first locking ring during normal locking, the owner inserts the key to the second key stop stage of the cylinder lock means while applying pressure to the key and turns it in the other direction. Then, the lock maintenance of the first locking ring by the first ring restricting means is released, and the first locking ring automatically moves in the unlocking direction by the urging force of the first ring urging means to open the lock body. The ring is released and the locking device is unlocked. Of course, both during normal locking and unlocking,
Unless an abnormal situation such as theft occurs, a second emergency lock
The locking ring maintains the unlocked state.

Next, an emergency locking operation as an anti-theft function by a second locking ring for emergency locking in the event of unauthorized unlocking by a person who is not the proper owner of the locking device will be described. The thief inserts the key into the cylinder lock means in order to unlock the locked first locking ring with an illegal key such as forgery or falsification. Normally, the unauthorized key first hits the first key stop stage where it can be inserted without applying pressure. In the first key suspension stage, the unauthorized key cannot be turned in the other direction, so it is always turned in one direction. Then, the unlocking maintenance of the second locking ring by the second ring restricting means is released, and the second locking ring is automatically moved in the locking direction by the urging force of the second ring urging means, so that the lock body is locked. The opening is closed and the locking device enters emergency locking.

Of course, the unauthorized key may be pushed further to reach the second key stop stage which is ahead of the first key stop stage. In the second key suspension stage, the unauthorized key can be turned in both the one direction and the other direction. However, when the unauthorized key is turned in one direction, the lock device is in the second position as in the first key suspension stage.
Enter emergency locking with a locking ring. Also, if the unauthorized key is turned in the other direction, of course, as in the case of the regular key, only the first locking ring moves in the unlocking direction, and the locking device is completely unlocked. However, the probability that the unauthorized key is turned in the other direction in the second key suspension stage is half, and the unauthorized key cannot be reached unless the forcible key is strongly pushed. Is less likely to be set. Moreover, the key of the lock device according to the first aspect of the present invention is a cylinder lock key (hereinafter, appropriately referred to as a "cylinder key"), and it is difficult to create an illegal key same as a regular key by falsification or forgery.

In the lock device according to the second aspect of the present invention, the first locking piece of the first ring restricting means enters and locks into the first concave portion for locking of the first locking ring, whereby the first ring is locked. The locked state is maintained by the regulating means. Then, when the rotating body of the cylinder lock means moves the first driving piece by the turning operation of the inserted key in the other direction, the first driving piece moves.
The lock between the recess and the first locking piece is released, and the first locking ring shifts to the unlocked state. On the other hand, when the second locking piece of the second ring restricting means enters and locks in the second concave portion for locking of the second locking ring, the unlocked state is maintained by the second ring restricting means. . Then, when the rotating body in the cylinder lock means moves the second driving piece by rotating the inserted key in one direction, the locking between the second recess and the second locking piece is released, and the second locking piece is released. The ring transitions to emergency locking.

When the cylinder key is at the first key stop stage, the ratchet teeth coaxially fitted on the outer periphery of the rotating body engage with the tab pieces, so that the cylinder key can be turned only in one direction. When the cylinder key is pushed in before the first key stop stage, the engagement between the ratchet teeth and the tab pieces is automatically released, and when the cylinder key is set on the second key stop stage, the cylinder The key can be turned in either one or the other direction and can be operated.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lock device according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the appearance of a horseshoe-shaped lock device according to the embodiment. 2 to 5
FIG. 4 is an explanatory view showing a locked state and an unlocked state of a locking ring of the locking device. The lock device according to the embodiment includes a lock body 1 and a cylinder key 2 which are generally horseshoe-shaped and open in a ring shape, and the lock body 1 is equipped with a lock device for a locked body such as a bicycle. Mounting plate V is provided. The mounting plate V is provided with a mounting hole Va, and is mounted on a bicycle or the like using the mounting hole Va, for example, in the same manner as the conventional case shown in FIG. The lock body 1 is provided with a case 3 for storing necessary parts, and a ring lock section 4 for storing two first and second locking rings 10 and 11 and a cylinder lock section into which the cylinder key 2 is inserted. And 5. Case 3 corresponds to line L shown in FIG.
It is divided into left and right in the circumferential direction with A as a boundary, and the flange portions 1a, 1a are assembled together by fastening with set screws 1b, 1b.

The ring housing 4 of the lock body 1 has a ring opening 4a.
Although it is interrupted at the point, the whole is a substantially annular cylindrical body. The ring opening 4 is provided inside the ring housing 4.
The first and second locking rings 10 and 11 are housed so as to be rotatable in both forward and reverse directions along the circumferential direction along a path passing through the path a. In the locked state, as shown in FIGS. In the unlocked state, both locking rings 10 and 11 are in a position to close ring opening portion 4a, and as shown in FIGS. And the entirety is located at the position where the ring opening portion 4a is opened. In the embodiment, the first locking ring 10 is for normal locking, and the second locking ring 11 is for emergency locking in case of theft or the like. Further, a thin section (not shown) is interposed between the first and second locking rings 10 and 11 in a fixed section along the circumferential direction in the ring accommodating portion 4, and this thin plate is used as both locking rings. A partition for preventing contact and interference between 10, 10 is provided. A protruding piece 10 </ b> A extending toward the second locking ring 11 is provided at the tip of the first locking ring 10, and the first locking ring 10 is provided at the tip of the second locking ring 11. 11A is provided.

A tension coil spring (first ring urging means) 12 for urging the locked first locking ring 10 in the unlocking direction is provided in the ring accommodating portion 4, as shown in FIG. 1 Attached to the rear of the locking ring, the rear end is fixed to the inner surface of the ring accommodating portion 4 and arranged, and as shown in FIG. 3, the first locking ring 10 moves in the locking direction. In this case, the first locking ring 10 receives a force to be pulled back in the unlocking direction by the tension coil spring 12 in the extended state. As shown in FIG. 1, a case 3 is provided on a side surface of the first locking ring 10.
A lever 19 is attached so as to protrude from an elongate hole 18 formed in the lateral surface along the circumferential direction. When the lever 19 is manually moved along the elongated hole 18 in the direction indicated by the arrow RA, the first locking ring 10 in the unlocked state shown in FIG.
Can be shifted to the locked state of FIG.

Further, as shown in FIG. 2, the first locking ring 10 has a first concave portion 14 for locking, and the first locking ring 10
A first locking piece (first ring restricting means) 15 for maintaining the locking state of the locking ring 10 is provided on the side of the ring so as to be able to advance and retreat, and as shown in FIG.
While the first locking piece 15 is locked, the locked state of the first locking ring 10 is maintained against the force of the tension coil spring 12.

A compression coil spring (second ring urging means) 13 for urging the unlocked second locking ring 11 in the locking direction in the ring accommodating portion 4 also has a distal end, as shown in FIG. (2) The lock ring 11 is attached to the end of a tunnel 11a formed from the rear end face of the lock ring 11 toward the back, and the rear end is provided in a state of being attached to the inner surface of the ring housing portion 4, as shown in FIG. Meanwhile, when the second locking ring 11 moves in the unlocking direction, the compression coil spring 13 which is pressed and contracted into the tunnel 11a receives a force for pushing out the second locking ring 11 in the locking direction. It has a configuration. Further, as shown in FIG.
The locking ring 11 is provided with a second locking recess 16, and the second locking member 11 maintains the unlocked state of the second locking ring 11 by locking with the second recess 16. A stop piece (second ring restricting means) 17 is provided so as to be able to advance and retreat on the side of the ring, and the second recess 16 and the second locking piece 17 are locked as shown in FIG. During this time, the unlocked state of the second locking ring 11 is maintained against the force of the compression coil spring 12.

Next, the structure of the cylinder lock 5 of the lock body 1 will be described. As shown in FIG. 1, the cylinder lock part 5 has a keyhole 20 for inserting the cylinder key 2 on its end face, and as shown in FIGS. 1 and 6,
A columnar rotating body 21 that is rotated by the turning operation of the inserted cylinder key 2 is disposed inside. The cylinder lock 5 enters the side surface of the rotating body 21 and
A plurality of pin bodies (not shown) that have one detent,
The cylinder key 2 has a well-known cylinder lock structure in which the cylinder key 2 is pushed away when the cylinder key 2 is inserted, the connection between the rotating body 21 and the case 3 is released, and the turning operation of the cylinder key 5 and the rotating body 21 is permitted.

In the case of the cylinder lock portion 5 of the lock body 1, as will be specifically described below, a first key stop stage where the inserted cylinder key 5 abuts without applying a pressing force and stops, A second key stop stage is set before the first key stop stage where the cylinder key 5 inserted under pressure abuts and stops. As shown in FIGS. 6 and 7, a ratchet tooth 22 and a coil spring 23 are coaxially fitted on the outer periphery of the rotating body 21. The ratchet tooth 22 has a protruding piece 22 a at a position where the inserted cylinder key 5 abuts. The cylinder key 5 inserted (normally) without applying a pushing force hits the protruding piece 22 a of the ratchet tooth 22. Will stop. This key suspension state is the first key suspension stage. In the first key stop stage, the ratchet teeth 22 are engaged with the claw pieces 24 attached to the case 3 side, and the rotating body 21 does not rotate leftward but rightward when viewed from the key insertion side. It is configured to rotate only in the direction (one direction).

On the other hand, the tip end of the coil spring 23 is
1 stops at the stopper convex portion 25 on the outer peripheral surface, and the ratchet teeth 22 are freely fitted in the key insertion direction so that if the coil spring 23 contracts, it can move in the direction indicated by the arrow XA. It is configured. Therefore, the cylinder key 2 (coil spring 23
8 and 9 while the cylinder key 2 presses and retracts the coil spring 23 via the protruding piece 22a of the ratchet teeth 22 to move the ratchet teeth 22 first. As shown, the cylinder key 5 stops at a point where the cylinder key 5 has advanced beyond the first key stop stage. The key suspension state at this time is the second key suspension stage. In the second key stop stage, the ratchet teeth 22 and the claw pieces 24 are disengaged from each other, so that the rotating body 21 can move in the right direction (one direction) or the left direction (the other direction) when viewed from the key insertion side. Can also go around. The rotating body 21
Are locked to the projections 27 on the inner surface of the case 3 by stopper projections 25 and 26 on the outer peripheral surface. Even if the cylinder key 2 is pushed in by a strong pressing force, the insertion direction of the cylinder key 2 (the rotation (Axial direction).

On the other hand, as shown in FIG. 6, a first drive piece 31 for releasing the engagement between the first recess 14 and the first engagement piece 15 is provided at the tip of the rotating body 21, and a second recess. Second driving piece 3 for releasing the locking between the second locking piece 17 and the second locking piece 17
9 is provided, and as shown in FIG. 9, a third recess 16 for engaging the second recess 16 with the second locking piece 17 is provided.
A drive piece 33 is provided. These first to third drive pieces 31 to 33 exhibit the following drive functions as the rotating body 21 rotates.

On the other hand, the first locking piece 15 is shown in FIG.
As shown in (5), it moves between the solid line state and the dashed line state around the fulcrum CA. When the operation piece 34 is pushed by the first drive piece 31, the operation piece 34 is brought into a dashed line state. During the engagement with the first concave portion 14, the solid line state is maintained. Also, the second locking piece 17
Moves between the solid line state and the dashed line state around the fulcrum CB as shown in FIG. When the actuating piece 35 is pushed by the second drive piece 32, the state becomes a one-dot chain line state. During the engagement with the second recess 16, it is in a solid line state. Further, when the third driving piece 33 in the dashed line state is pushed from the opposite side by the operating piece 35, the state returns to the solid line state. Further, the operating piece 34 and the operating piece 35 partially overlap each other in the state shown in FIG.

When the rotating body 21 rotates to the left, the first driving piece 31 pushes only the operating piece 34, and the first driving piece 31
The locking piece 15 is shifted from the solid line state to the one-dot chain line state. Accordingly, the first locking piece 15 is
Deviate from 4. When the rotating body 21 rotates to the left, the operating piece 35 is not pushed, so that the second locking piece 17 does not move at all.

When the rotating body 21 rotates rightward,
The second driving piece 32 pushes the operating piece 35 to move the second locking piece 15 from the solid line state to the dashed line state. Along with this, the second locking piece 17 is disengaged from the second concave portion 16, but at this time, since the operating piece 35 pushes the overlapping operating piece 34, the first locking piece 15 is also changed from the solid line state. The state shifts to the one-dot chain line state, and the first locking piece 15 also comes off the first recessed portion 14.

Next, a description will be given of locking or operation of the locking device of the embodiment having the above configuration. The operation of the device during normal locking is as follows. In normal locking, the first locking ring 10 of the locking device in which the first and second locking rings 10 and 11 are in the unlocked state is shifted from the unlocked state to the locked state. First, by grasping the lever 19 attached to the side surface of the first locking ring 10, the first locking ring 10 is moved along the elongated hole 18 by the arrow R.
When manually moved in the direction indicated by A, the first locking ring 10
3 comes out of the case 3, passes through the ring opening 4a, and enters the opposite side of the case 3 as shown in FIG.
To close. At the same time, when the first recess 14 of the first locking ring 10 comes to the position of the first locking piece 15, the first locking piece 15 enters the first recess 14 by its own weight and is locked. Although the extended tension coil spring 12 attempts to pull back the first locking ring 10, the first locking piece 15 and the first recessed portion 14 are locked, so that even if the hand is released from the lever 19, the first locking ring 10 is locked. The locked state is maintained without returning the ring 10.

The operation of the device during normal unlocking is as follows. In the case of normal unlocking, the first locking ring 10 is in the locked state, and only the first locking ring 10 of the locking device in which the second locking ring 11 is in the unlocked state is shifted from the locked state to the unlocked state. Will be. The (authorized) owner of the lock device presses the cylinder key 2 into the keyhole 20 and inserts it.
The cylinder key 2 is set to the second key stop stage at a stretch. In the second key stop stage, since the engagement between the ratchet teeth 22 and the claw pieces 24 is released, when the operation of turning the cylinder key 2 to the left is performed, the rotating body 21 also rotates to the left, 1 drive piece 31 pushes only operating piece 34,
The first locking piece 15 comes off the first recess 14. Then, since there is no longer anything that stops the tension force of the tension coil spring 12, the first locking ring 10 is pulled back by the tension coil spring 12, and as shown in FIG. Is unlocked.

The operation of the device at the time of emergency locking in the case of theft is as follows. In the illegal unlocking, the first locking ring 10 of the locking device in which the first locking ring 10 is in the locked state and the second locking ring 11 is in the unlocked state shifts from the locked state to the unlocked state, Second locking ring 11
Will shift from the unlocked state to the (emergency) locked state. When a thief attempts to steal a bicycle by unlocking the lock device, an unauthorized key due to falsification or forgery is inserted into the keyhole 20.
The illegal key inserted normally is set to the first key suspension stage. In the first key suspension stage, the ratchet teeth 22
The key cannot be turned to the left and can only be turned to the right by the engagement of the claw piece 24 with the claw piece 24. Therefore, the unauthorized key must be turned to the right. Direction, the second driving piece 32 pushes the operating piece 35,
The locking piece 17 comes off the second recess 16. At the same time, the operating piece 35 also pushes the operating piece 34, so that the first locking piece 15
Also comes off from the second recess 14.

Therefore, the first locking ring 10 is pulled back and shifts to the unlocked state. However, at this time, since the second locking ring 11 also has nothing to stop the pushing force of the compression coil spring 13, the second locking ring 11 protrudes and passes through the ring opening 4a, as shown in FIG. 3 and closes the ring opening 4a, so that the locking device enters an emergency unlocking state, and eventually the thief fails to unlock the locking device.

Further, even when the unauthorized key is strongly pressed and set to the second key stop stage, when the unauthorized key is turned clockwise, the locking device enters the emergency unlocking state in the same manner as above. In addition, it is unlikely that an unauthorized key will be set in the second key suspension stage prior to the first key suspension stage.
Even if the thief has an unauthorized key that matches the lock device, the probability of successfully unlocking the lock device of the present invention is extremely low.

The operation of the device when the emergency locking by the second locking ring 11 is unlocked is as follows. If the user grips the lever 19 on the side surface of the first locking ring 10 and manually moves it along the long hole 18 in the direction indicated by the arrow RA,
As shown in FIG. 12, the protruding piece 1 of the first locking ring 10
While the first locking ring 10 is in contact with the protruding piece 11A of the second locking ring 11, the first locking ring 10 is
Is moved in the locking direction while pushing back in the unlocking direction.
Then, as shown in FIG. 5, when the second locking ring 11 is pushed back to the back, the cylinder key 2 is turned counterclockwise to push the operating piece 35 in the opposite direction, and the second locking piece 17 is pushed into the second recess 1.
6, the second locking ring 11 is returned to the locked state.

The present invention is not limited to the above embodiment, but can be modified as follows. (1) In the above embodiment, the normal unlocking is performed by turning the cylinder key to the left, and the emergency locking is performed by turning the cylinder key to the right. However, the normal locking is performed by turning the cylinder key to the right. As a modified example, unlocking is performed, and turning the cylinder key to the left enables emergency locking.

(2) The specific shapes of the first and second locking rings are not limited to those in the embodiment, and the first and second ring urging means are not limited to those formed by coil springs. Further, the first and second ring restricting means may be other than the locking structure of the locking piece and the concave portion of the embodiment.

(3) In the above embodiment, the lock device is for a motorcycle, but it goes without saying that the lock device of the present invention may be used for a house or the like.

[0035]

According to the lock device of the first aspect of the present invention, the key inserted into the lock body is not a simple push-in type but a cylinder type in which a false key is difficult to make, and the key is inserted normally. If only the key is set to the first key stop stage where emergency locking by the second locking ring for emergency locking is performed, and the second key stop stage where the first lock ring can be unlocked temporarily Even if the key is set, if the rotation direction of the key is different, emergency locking by the second locking ring is immediately applied, so that a person who is not the proper owner of the lock device illegally unlocks with an unauthorized key. It can be avoided reliably.

According to the lock device of the second aspect of the present invention,
Unlocking / locking maintenance mechanism, first key suspension stage and first
Since the setting structure of the key stop stage is based on the engagement between the recessed portion and the engagement piece and the engagement between the ratchet teeth and the claw pieces, it can be implemented easily and inexpensively.

[Brief description of the drawings]

FIG. 1 is an external perspective view when a lock device of an embodiment is in a completely unlocked state.

FIG. 2 is an explanatory diagram showing an unlocked state of a first locking ring of the embodiment device.

FIG. 3 is an explanatory diagram showing a locked state of a first locking ring of the embodiment device.

FIG. 4 is an explanatory diagram showing a locked state of a second locking ring of the embodiment device.

FIG. 5 is an explanatory view showing an unlocked state of a second locking ring of the embodiment device.

FIG. 6 is a front view showing an internal configuration of a cylinder lock portion of the embodiment device.

FIG. 7 is a side view showing a ratchet tooth in the embodiment device.

FIG. 8 is a front view showing a disengaged state between the ratchet teeth and the tab pieces of the embodiment device.

FIG. 9 is a plan view showing a configuration near a tip end of a rotating body of the embodiment device.

FIG. 10 is a plan view showing a configuration near a first locking piece of the embodiment device.

FIG. 11 is a plan view illustrating a configuration near a second locking piece of the embodiment device.

FIG. 12 is a perspective view showing a state of an unlocking operation of a second locking ring of the embodiment device.

FIG. 13 is an external perspective view showing a conventional lock device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Lock body 2 ... Cylinder key 4 ... Ring accommodating part 4a ... Ring opening part 5 ... Cylinder lock front part 10 ... 1st locking ring 11 ... 2nd locking ring 12 ... Tension coil spring 13 ... Compression coil spring 14 ... 1st dent Part 15: First locking piece 16: Second recessed part 17: Second locking piece 21: Rotating body 22: Ratchet tooth 24: Claw piece 31: First driving piece 32: Second driving piece

Claims (2)

(57) [Claims] 1. A lock body having an open ring shape, a key detachable from the lock body, and a path passing through an open portion of the lock body is rotated in both forward and reverse directions along a circumferential direction. It is provided with a locking ring housed inside the lock body so that it can be locked, and the locking ring closes the ring opening part to lock the door, and the locking ring opens the ring opening part to unlock. In the lock device configured to be performed, the key is a cylinder lock-type key, and includes a first locking ring for normal locking as the locking ring, and a second locking ring for emergency locking. First ring urging means for urging the first locking ring in the unlocking direction; second ring urging means for urging the second locking ring in the locking direction; and unlocking by the first ring urging means. A first phosphorus that maintains the locked state of the first locking ring against the urging force Regulating means, second ring regulating means for maintaining the unlocked state of the second locking ring against the locking urging force of the second ring urging means, and turning operation by the key is performed when the key is inserted. A cylinder lock means, wherein the cylinder lock means is arranged such that a key inserted without applying a pushing force abuts and stops along the direction of entry of the key.
A key stop stage and a second key stop stage ahead of a first key stop stage where a key inserted with a pressing force abuts and stops are set. In the first key stop stage, the key is stopped in one direction with respect to the key. Only the turning operation of
In the key stop stage, the turning operation of the key in the other direction is also permitted, and the turning operation in the one direction allows the second operation.
The lock is configured so that the second lock ring is not unlocked and maintained by the ring restricting means, and the first lock ring is not locked and maintained by the first ring restricting means by the turning operation in the other direction. apparatus. 2. The lock device according to claim 1, wherein
The locking ring is provided with a first recess for locking,
The locking ring is provided with a second concave portion for locking, and the first ring restricting means enters and locks into the first concave portion to maintain the locked state of the first locking ring. A second lock restricting means which enters and locks the second recess to maintain the unlocked state of the second locking ring, and wherein the cylinder lock means is inserted. A rotating body that is rotated by a turning operation of the key. The tip of the rotating body moves along with the turning operation of the key in the other direction and locks the first recess and the first locking piece. A first drive piece for releasing the lock, and a second drive piece for moving along with the turning operation of the key in one direction and releasing the lock between the second recess and the second lock piece, are provided. And, in the cylinder lock means, a ratchet tooth coaxially fitted around the outer periphery of the rotating body. A claw which engages with the ratchet teeth at a position corresponding to the first key stop stage so as to allow only a one-way turning operation of the key, and which is inserted by applying a pressing force. And the ratchet teeth are moved forward to disengage the ratchet teeth from the claws.