JP4951289B2 - Cylinder lock - Google Patents

Description

  The present invention relates to a cylinder lock that can be reset when the key exchange is completed by inserting and using a new key in a keyhole, for example, in a cylinder lock that can exchange keys.

Conventionally, a key change method of a cylinder lock in a housing complex such as a hotel, a condominium, and a rental apartment is, for example, an outer cylinder, an inner cylinder that is rotatably included in the outer cylinder, A plurality of tumblers urged toward the center, a plurality of tumblers provided in the inner cylinder, and an auxiliary tumbler appropriately provided between the tumblers of the outer cylinder and the inner cylinder facing each other, There is known one that enables key change by excluding the auxiliary tumbler from the lock with a different key (see Patent Document 1).
JP-A-11-125039

  However, with the conventional cylinder lock, after the key change is repeated and it becomes the last key, the key change becomes impossible and there is no choice but to replace it with a new cylinder lock. In addition, the auxiliary tumbler is removed from the cylinder lock every time the key is changed, so to reset, the inner cylinder must be removed from the outer cylinder and the auxiliary tumbler must be attached to the inner cylinder. It takes. Even if the grand master key can be used, the owner key used in the past cannot be reused. If the state of the auxiliary tumbler can be restored without exchanging the inner cylinder and the outer cylinder, it can be used again from the first key, which is convenient and the running cost is reduced. The cylinder lock according to the present invention has been proposed in order to solve such problems.

The gist for achieving the object by solving the above-described problems of the cylinder lock according to the present invention is as follows: an outer cylinder having a fixing means for fixing to an external member; An inner cylinder that is provided at the rear end portion and engages with a locking / unlocking driver; a plurality of outer tumblers that are arranged on the outer cylinder and are each urged by elastic means toward a key hole of the inner cylinder; A plurality of inner tumblers which are arranged in a cylinder and are opposed to each other and are arranged opposite to each other so that the front end faces the key hole; An intermediate pin positioned at the intermediate pin reference position by an intermediate pin that is urged by the outer tumbler to be disposed on the inner cylinder side and a key change key that is a higher-order key than the key in use How to change the key when left in the storage section on the outer cylinder side from the storage section on the side An intermediate pin storage portion for storing the intermediate pin on the inner cylinder side by rotation of the intermediate pin, a stocker pin provided in the intermediate pin storage portion for moving the intermediate pin to the storage hole on the outer cylinder side, and the intermediate An intermediate pin evacuation hole provided on the outer cylinder side facing the pin housing portion, and a radius of the inner cylinder provided in the intermediate pin evacuation hole and not exceeding a shear line at the boundary between the inner cylinder and the outer cylinder The upper tumbler and the inner tumbler, the intermediate pin, the intermediate pin accommodating portion, the stocker pin, the intermediate pin retracting hole, and the upper pressing pin are biased in the direction of the key used. 1-No. n (n is an integer of 2 or more) corresponding to n stages in the inner cylinder or the outer cylinder, respectively, and when the key number is changed with a higher-order key for the key in use The intermediate pin is moved and stored from the storage portion on the inner cylinder side of the intermediate pin reference position to the intermediate pin storage portion, and there is no intermediate pin in the inner cylinder side storage portion of the intermediate pin reference position so that the outer cylinder side The tip of the outer tumbler advances to the inner cylinder side beyond the shear line, and cannot be unlocked with a lower key than the upper key, and the outer tumbler of the outer tumbler cannot be unlocked with a higher key than the upper key. It can be unlocked by pushing the tip part back to the shear line, and the reset key is provided with a recessed groove that is exposed to the outside along the key hole when the reset key is attached to the key hole. The reset key rotates the inner cylinder to the key change position. After that, the reset rod is inserted into the concave groove from the outside, the intermediate pin of the intermediate pin storage part is stored on the outer cylinder side, and the reset key is returned from the key change position to the intermediate pin reference position and pulled out. The intermediate pin is moved from the outer cylinder side storage portion of the intermediate pin reference position to the inner cylinder side storage portion, and the intermediate pins of each stage are returned to the initial state.

After the inner cylinder is rotated to the key change position by the reset key, the reset key is returned to its original position and pulled out from the key hole without inserting the reset rod into the concave groove, and all the intermediate pins are moved to the intermediate pins. The key is moved to the storage section and the key No. 1-No. This includes that any of n cannot be locked / unlocked.

According to the cylinder lock of the present invention, no. No. 1 key, this No. No. higher for one key. The key of X can always be locked and unlocked, and when a key change operation is performed, a No. subordinate to the key that has undergone the key change operation is displayed. Keys below X-1 key cannot be used.
Also, when a reset key that can be locked and unlocked at all times is inserted into the keyhole, the inner cylinder is rotated to the key change position, and the inner cylinder is returned to the original position, the intermediate pin at each stage is inserted into the intermediate pin storage part. Moving. As a result, no. 1-No. All keys up to n cannot be used.
Further, when the inner cylinder is turned to the key changing position with the reset key and the reset rod is inserted into the concave groove of the reset key and inserted into the inner cylinder, the intermediate pin is moved by the stocker pin of the intermediate pin storage portion. When the reset key is moved back to the original position in the state where the intermediate pin reference position is moved to the outer cylinder side storage portion, the intermediate pin moved to the outer cylinder side is pushed by the elastic member via the outer tumbler. Then, the intermediate pin of each stage returns to the initial state by being moved to the storage portion on the inner cylinder side.
Thus, the cylinder lock of the present invention has a higher rank No. The key of the key becomes a key change key, no special key change key is required, the reset key can prohibit the use of other keys, and the reset rod can be used to return to the initial state. Can do.
The reset key can be locked and unlocked by simply rotating it in the unlocking direction and unlocking it without returning it to the original locking position. It can be used as a master key without changing the key usage number.

  As shown in FIG. 1, a cylinder lock 1 according to the present invention includes a cylindrical outer cylinder 2 having a fixing means for fixing to an external member, and a key hole 3 a that is rotatably contained in the outer cylinder 2 from the tip. There is a cylindrical inner cylinder 3 which is provided and engages with a locking / unlocking driver 4 at the rear end.

  A plurality of outer tumblers 6 disposed on the outer cylinder 2 and each urged by an elastic means 5 toward the key hole 3a of the inner cylinder 3, and an outer cylinder side disposed on the inner cylinder 3 There are a tumbler 6 and a plurality of inner tumblers 7 each arranged in an opposing arrangement and facing the keyhole 3a at the tip. There is an intermediate pin 8 which is urged by the outer tumbler 6 and disposed on the inner cylinder side between the front end portion of the outer tumbler 6 and the rear end portion of the inner tumbler 7 which face each other.

  When the intermediate pin 8 is left in the storage portion 2a on the outer cylinder side from the storage portion 3b at the intermediate pin reference position A by a key change key which is a master key or a key higher than the key in use, the key change direction (A counterclockwise direction in FIG. 2), the intermediate pin storage portion 3c for storing the intermediate pin 8 on the inner cylinder side by rotation in the inner cylinder side, and the intermediate pin 8 provided on the intermediate pin storage portion 3c on the outer cylinder side A stocker pin 9 for moving to the storage hole 2a, an intermediate pin retracting hole 2b provided on the outer cylinder side facing the intermediate pin storing portion 3c, and an inner pin receiving hole 2b There is a holding upper pin 10 that is biased in the radial direction of the inner cylinder 3 without exceeding the shear line a at the boundary between the cylinder 3 and the outer cylinder 2.

  As shown in FIGS. 1 and 2, the outer tumbler 6 and the inner tumbler 7, the intermediate pin 8, the intermediate pin storage portion 3c, the stocker pin 9, the intermediate pin retracting hole 2b, and the holding upper pin 10 are used. No. 1-No. Corresponding to n (n is an integer equal to or greater than 2), in the inner cylinder 3 or the outer cylinder 2, along the axis of the key hole 3a, the front is the first stage and the rear is divided into n stages. In the first embodiment, they are provided from the second stage. Of course, it may be provided from the first stage. In each of the first to nth stages, the inner tumbler 7a and the outer tumbler 6a are arranged radially from the center at intervals in the circumferential direction to prevent unlocking by a different key.

  With respect to the key changing operation of the cylinder lock 1, unlocking becomes possible or impossible depending on the presence or absence of the intermediate pin 8. As shown in FIG. 2, the intermediate pin 8 in the storage portion 3 b on the inner cylinder side at the intermediate pin reference position A is the initial state from the second stage to the n-th stage of the cylinder lock 1. From this state, the unlocking operation is rotated about 90 degrees clockwise, and the key changing operation is rotated about 45 degrees counterclockwise. The position of the keyhole 3a in the initial state is the locked state.

  And No. The state in which one key 11 is inserted into the keyhole 3a is the state shown in FIG. In the initial state, the distal end portion of the outer tumbler 6 advances to the inner tube 3 side beyond the shear line a, and the intermediate portion 8 and the inner tumbler 7 are provided in the storage portion 3b.

  In the state shown in FIG. The inner tumbler 7 and the intermediate pin 8 are pushed outward in the radial direction according to the depth of the key groove of the one key 11, and the tip of the intermediate pin 8 is aligned with the shear line a. Further, in the intermediate pin housing portion 3c, the stocker pin 9 is pushed out radially outward, and its tip surface is aligned with the shear line a.

  As a result, the outer tumblers 6 and 6a are prevented from entering the intermediate pin storage portion 3c for storing the stocker pins 9 during the operation of locking and key change. The other outer tumbler 6a and inner tumbler 7a are in contact with each other with the shear line a as a boundary. The rotation of the inner cylinder 3 by one key 11 is allowed.

  As shown in FIG. 1 even if the key 11 is rotated counterclockwise, the inner tumblers 7 and 7a on the inner cylinder 3 side and the tip of the stocker pin 9 are aligned with the shear line a, so the outer tumblers 7 and 7a Never exceed.

  Next, no. When the second key 12 is inserted, as shown in FIG. 5, the depth of the key groove 12a at the intermediate pin reference position A in the second stage is shallower than that of the key 11, so that the inner tumbler 7 and the intermediate pin 8 is pushed outward in the radial direction, the tip of the inner tumbler 7 is aligned with the shear line a, and the intermediate pin 8 extends over the shear line a into the storage hole 2a on the outer cylinder 2 side. Thereby, the outer tumbler 6 in the accommodation hole 2a is pushed outward against the urging force of the coil spring 5 which is an elastic means.

  Further, in the intermediate pin storage portion 3c, the depth of the key groove 12b of the key 12 is deeper than that of the key 11, so that the stocker pin 9 is not pushed outward in the radial direction. There is a sufficient gap between the tip of the wire and the shear line a so that the intermediate pin 8 can enter.

  From this state, the key 12 can be unlocked by rotating it clockwise. The key No. All keys with a higher X can be locked and unlocked. Then, as shown in FIG. 6, when the key 12 is rotated counterclockwise to the key change position (about 45 degrees in this embodiment, in the middle of the rotation in the figure), the intermediate pin reference is obtained at the second stage. The storage hole 2a at the position A and the intermediate pin storage portion 3c coincide with each other in the radial direction, and are pushed inward in the radial direction via the outer tumbler 6 by the urging force of the coil spring 5, so that the intermediate pin 8 is moved to the shear line a. And enters the intermediate pin storage part 3c. It should be noted that the upper end of the restraining upper pin 10 in the intermediate pin retracting hole 2b is aligned with the shear line a regardless of whether or not the storage hole on the inner cylinder 3 side is matched.

  Then, when the key 12 is rotated back in the clockwise direction, returned to the original position and pulled out from the key hole 3a, the result is as shown in FIG. In the second stage, the intermediate pin 8 is lost at the intermediate pin reference position A, and the intermediate pin 8 is stored in the intermediate pin storage portion 3c. As a result, the height of the intermediate pin 8 at the intermediate pin reference position A is insufficient. Therefore, as shown in FIG. Even when the first key 11 is inserted into the key hole 3a, the intermediate pin 8 does not exist in the storage portion 3b at the intermediate pin reference position A as shown in FIG. The tip of 6 enters the inner cylinder 3 side beyond the shear line a. Thereby, even if it is going to rotate the inner cylinder 3 with the key 11, the said outer tumbler 6 is caught and it becomes impossible to rotate.

  Further, since the key 11 is inserted into the key hole 3a, the stocker pin 9 is pushed outward in the radial direction, and the tip thereof is aligned with the shear line a, so that the intermediate pin 8 exceeds the shear line a. It moves to the outer cylinder 2 side and is accommodated in the intermediate pin escape hole 2b and retracted. The restraining upper pin 10 is pushed outward against the coil spring 5. As described above, when the intermediate pin receiving hole 2b has a shallow key groove, the intermediate pin 8 stored in the intermediate pin storage portion 3c is forcibly moved to the outer cylinder 2 side. This is for retracting to the outer cylinder 2 side so as not to hinder the rotation of the cylinder 3.

  Thus, no. When the key 12 is changed using the key 12 of No. 2, the intermediate pin 8 at the second stage moves to the intermediate pin storage portion 3c, and the lower No. Key 11 can no longer be used. The key 12 itself has a function of a change key. In the state shown in FIG. 5, even when the key 12 is inserted into the keyhole 3a and the key change operation is not immediately performed, the unlocking operation is performed and the inner cylinder 3 is rotated clockwise, the intermediate pin storage portion 3c. The outer tumbler 6a does not enter the intermediate pin storage portion 3c during the unlocking operation.

  Thus, the second stage intermediate pin 8 has moved from the intermediate pin reference position A to the intermediate pin storage part 3c. The second key 12 and higher key can be locked / unlocked, but the lower key 11 cannot be locked / unlocked. Furthermore, in the third stage, no. When the intermediate pin 8 is moved from the intermediate pin reference position A to the intermediate pin storage portion 3c by the key change operation using the key No. 3, 1 and No. Since the outer tumbler 6 at the intermediate pin reference position A enters the inner cylinder 3 side, the inner cylinder 3 cannot be rotated and cannot be used.

  When the second and third intermediate pins 8 of the cylinder lock 1 are moved from the intermediate pin reference position A to the intermediate pin storage portion 3c, the intermediate pins are moved back to the original positions by the reset key. 8 does not move from the intermediate pin storage portion 3c.

  If a plurality of keys with such serial numbers are prepared, for example, even if the user does not carelessly use the key, the key manager will give the user the next highest number. By passing the X key, it is possible to change the key immediately and use it immediately. There is no need to change cylinder locks or to prepare special keys for changing keys. This relationship is shown in the following table.

The presence or absence of the intermediate pin 8 indicates the presence or absence at the intermediate pin reference position A in each stage. A circle indicates that locking / unlocking is possible.

  Next, a method of returning all the intermediate pins 8 of each stage to the intermediate pin reference position A with the reset key 13 shown in FIG. The reset key 13 has a grip portion 13a and a main body portion 13b to be inserted into the key hole, and a single reset ditch 13c is provided on one side thereof. The entire rod-shaped reset rod 14 shown in FIG. 10 is inserted into the concave groove 13c. Reference numeral 14a denotes a grip portion, and 14b denotes a rod main body portion.

  As shown in FIG. 11, the reset key 13 is inserted into the key hole 3a of the cylinder lock 1 as shown in FIG. Then, since there is little extrusion in the radial direction due to the groove 13c in the upper corner of the main body 13b of the key, the gap between the tip of the stocker pin 9 and the shear line a in the intermediate pin storage portion 3c of each stage The intermediate pin 8 is stored.

  Then, as shown in FIG. 12, the reset key 13 is rotated about 45 degrees counterclockwise and set at the key change position. Then, the intermediate pin storage portion 3c reaches the intermediate pin reference position A, and the position coincides with the storage hole 2a in the radial direction. Therefore, as shown in FIG. 13, the reset rod 14 is inserted into the concave groove 13 c of the key 13 for resetting from the grip portion 13 a of the key 13 until it hits the back.

  Thereby, since the reset rod 14 is embedded in the concave groove 13c, the stocker pin 9 is pushed out in the radial direction and the tip thereof is aligned with the shear line a. At the same time, the intermediate pin 8 exceeds the shear line a and It enters the storage portion 2a on the cylinder 2 side. The outer tumbler 6 in the storage portion 2 a is pushed outward against the urging force of the coil spring 5. Since the reset rod 14 is inserted into the concave groove 13 c over each step, all the intermediate pins 8 of each step are stored in the storage portion 2 a of the outer cylinder 2.

  From the key change position shown in FIG. 13, the reset key 13 is rotated clockwise to return to the original position. Thereby, all the intermediate pins 8 remain in the storage portion 2a on the outer cylinder 2 side at the intermediate pin reference position A. Then, when the reset key 13 and the reset rod 14 are removed together from the key hole 3a, the intermediate pin 8 at the intermediate pin reference position A is stored in the housing portion on the outer cylinder 2 side as shown in FIGS. The coil spring 5 returns from 2a to the storage portion 3b on the inner cylinder 3 side. Thus, the initial state of the cylinder lock 1 is obtained.

  In this way, the intermediate pin 8 can be returned to the intermediate pin reference position A with the reset key 13, but in the state shown in FIG. 13, the reset key 13 is temporarily not inserted into the concave groove 13c. When the key is returned to the original position and removed from the keyhole 3a, all the intermediate pins 8 are moved to the intermediate pin storage portion 3c. 1 key to No. Any of the n keys cannot be locked or unlocked. Therefore, the key 13 can be simply changed with the reset key 13 so that other keys cannot be locked / unlocked. This also gives the user no. 1-No. Before handing over any of the keys up to n, the administrator can lock the cylinder lock 1, which is convenient in a newly built apartment.

It is a longitudinal cross-sectional view of the cylinder lock 1 which concerns on this invention. It is sectional drawing of each step | level with the intermediate pin 8 in the cylinder lock 1 of the same invention. In the initial state of the cylinder lock 1, No. It is sectional drawing of the state which inserted 1 key 11. FIG. In the cylinder lock 1, no. It is sectional drawing of the state which is rotating the inner cylinder 3 with the 1 key 11 in the key change operation direction (counterclockwise direction). In the initial state of the cylinder lock 1, no. 2 is a cross-sectional view showing a state in which a second key 12 is inserted into a key hole 3a. FIG. No. 2 is a cross-sectional view showing a state in which a key 12 is being operated to change a key. The cylinder lock 1 is No. FIG. 6 is a cross-sectional view showing a state in which the key of the second intermediate pin 8 is changed by the second key 12. Since the second intermediate pin 8 of the cylinder lock 1 has moved from the intermediate pin reference position A, the lower No. It is sectional drawing which shows that the 1 key 11 exists in the state which the inner cylinder 3 does not rotate. FIG. 4 is a plan view (A) of the reset key 13 and a cross-sectional view (B) along the line BB. It is the front view (A) of the reset rod 14, and a side view (B). It is sectional drawing of the state which inserted the reset key 13 in the keyhole 3a in the cylinder lock 1 of this invention. FIG. 6 is a cross-sectional view showing how the intermediate pin 8 at each stage is returned to the intermediate pin reference position A by the reset key 13. It is sectional drawing which shows a mode that the inner cylinder 3 is rotated to the key change position with the reset key 13, and the intermediate | middle pin 8 is moved to the outer cylinder 2 side with the reset rod 14 inserted in the ditch | groove 13c.

Explanation of symbols

1 cylinder lock,
2 outer cylinder, 2a storage part,
2b Intermediate pin retraction hole,
3 inner cylinder, 3a keyhole,
3b storage part, 3c intermediate pin storage part,
4 Locking / unlocking driver,
5 Elastic means (coil spring),
6,6a Outer tumbler,
7,7a Tumbler,
8 Intermediate pin,
9 Stocker pin,
10 Retaining pin,
11 No. 1 key, 12 No. 2 keys,
13 reset key, 13a gripping part,
13b body part, 13c concave groove,
14 reset rod, 14a gripping part,
14b Rod body.

Claims (2)

An outer cylinder having fixing means for fixing to an external member;
An inner cylinder that is rotatably included in the outer cylinder and is provided with a key hole from the front end and engages with a locking / unlocking driver at the rear end;
A plurality of outer tumblers disposed on the outer cylinder and each biased by elastic means toward the key hole of the inner cylinder;
A plurality of inner tumblers that are arranged in the inner cylinder and each of the outer tumblers on the outer cylinder side are arranged in opposition to each other and the front ends thereof face the key holes;
An intermediate pin that is urged by the outer tumbler and disposed on the inner cylinder side between a front end portion of the outer tumbler and a rear end portion of the inner tumbler,
Rotation in the key change direction when the intermediate pin is left in the storage part on the outer cylinder side from the storage part on the inner cylinder side at the intermediate pin reference position by the key change key which is a higher key than the key in use The intermediate pin storage portion for storing the intermediate pin on the inner cylinder side,
A stocker pin for moving the intermediate pin to a storage hole on the outer cylinder side provided in the intermediate pin storage portion;
An intermediate pin retracting hole provided on the outer cylinder side facing the intermediate pin storage portion,
There is a holding upper pin that is provided in the intermediate pin escape hole and is biased in the radial direction of the inner cylinder without exceeding the shear line at the boundary between the inner cylinder and the outer cylinder,
The outer tumbler and the inner tumbler, the intermediate pin, the intermediate pin storage portion, the stocker pin, the intermediate pin retraction hole, and the holding upper pin are used for the key No. used. 1-No. n (n is an integer of 2 or more) corresponding to the inner cylinder or the outer cylinder, each provided in n stages,
When a key change operation is performed with a higher-order key with respect to the key in use, the intermediate pin moves from the storage portion on the inner cylinder side of the intermediate pin reference position to the intermediate pin storage portion and is stored.
Since there is no intermediate pin in the inner cylinder side storage part at the intermediate pin reference position, the tip of the outer tumbler on the outer cylinder side advances over the shear line to the inner cylinder side, and a lower key than the upper key. Can no longer be unlocked,
With an upper key than the upper key, the tip of the outer tumbler can be unlocked by pushing it back to the shear line .
The reset key is provided with a concave groove that is exposed to the outside when the reset key is mounted in the key hole along the key hole, and the inner cylinder is rotated to the key change position by the reset key. After that, the reset rod is inserted into the concave groove from the outside, the intermediate pin of the intermediate pin storage part is stored on the outer cylinder side, and the reset key is returned from the key change position to the intermediate pin reference position and pulled out. The intermediate pin is moved from the outer cylinder side storage portion of the intermediate pin reference position to the inner cylinder side storage portion, and the intermediate pins of each stage are returned to the initial state;
Cylinder lock characterized by. After rotating the inner cylinder to the key change position with the reset key, if the reset key is returned to the original position and pulled out from the key hole without inserting the reset rod into the concave groove, all the intermediate pins are stored in the intermediate pin. And the key No. 1-No. that any of n cannot be locked / unlocked,
The cylinder lock according to claim 1.

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