JPH0620812U - Disc tumbler lock with master device - Google Patents

Abstract

(57) [Abstract] [Purpose] An inexpensive disc tumbler lock that allows the master key to be used with a simple structure, reducing the cost and significantly increasing the number of chain key that can be shared by one master key. . [Structure] A cylindrical case 5 is fitted onto an outer cylinder 3, and a master cylinder 4 is fitted between the outer cylinder front end 3A and the case 5 to fix the outer circumference of the master cylinder to the inner circumference of the case. The outer periphery of the portion 3A is rotatable with respect to the inner periphery of the master cylinder 4, and the outer periphery of the outer cylinder rear end portion 3B is rotatable with respect to the inner periphery of the case 5, and the tumbler at the front end is a master tumbler 7 in which only the master key can be engaged.
In this case, a plurality of master cylinders 4 are urged in the axial direction through the lock pin 13 inserted into the lock pin hole formed in the master cylinder 4 in the axial direction. A disc tumbler lock 1 with a master device was provided, which was a plurality of engageable tumblers 6 and was arranged.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disk tumbler lock provided on a door of a building, steel furniture, etc., and more particularly to a structure of a disk tumbler lock that can use a master key.

[0002]

[Prior art]

 Different keys are used for doors of rooms such as hotels and lockers for different lockers, and the hotel side can share locks and unlocks with multiple master keys with one master key. It has a master key, and in order to reduce the number of master keys, it is required to maximize the number of chain keys that can be shared by one master key. Therefore, for example, as disclosed in Japanese Utility Model Laid-Open No. 61-179269, there has been proposed a disk having two kinds of front and back surfaces and spring holes arranged in a staggered pattern.

[0003]

[Problems to be solved by the device]

 Although the structure described in the above publication is complicated and expensive, since permutations are used, it is not possible to increase the number of types of chain keys that can be shared, so it is effective in solving the requirement of multiple types. is not.

[0004]

[Means for Solving the Problems]

 As a means for solving the above problems, the present invention forms a lock groove in the axial direction on the inner peripheral surface of an outer cylinder fitted in an inner cylinder, and forms an insertion hole for inserting a key in the inner cylinder in the axial direction. In the axial direction orthogonal to the insertion hole, a disk-shaped tumbler whose total length is equal to the outer diameter of the inner cylinder is formed with vertical grooves that can move forward and backward at equal intervals, and the tumblers inserted in the vertical grooves are spring-repellent. In a disk tumbler lock that biases the tumbler in the axial direction with the lock groove to prevent the inner cylinder from rotating, a cylindrical case is fitted onto the outer cylinder, and the outer cylinder front end and the case The master cylinder is inserted between the master cylinder and the master cylinder, and the outer circumference of the master cylinder is fixed to the inner circumference of the case. Only the master key can be engaged with the tumblers on the front ends of the inner and outer cylinders. It is a starter tumbler, and a plurality of them are provided. A lock pin hole is formed in the master cylinder in the axial direction, and a lock hole is formed in the front end of the outer cylinder in the axial direction. Plural sets of holes and lock holes are arranged at opposite positions by shifting in the axial direction, the lock pin is slidably inserted into the lock pin hole and the lock hole, and the lock pin is axially moved by the lock pin spring. Energize to store the master tumbler in the inner cylinder, and the tumblers at the rear ends of the inner cylinder and outer cylinder are tumblers that can be stored in the inner cylinder by the engagement of the chain key. , The front end of the inner cylinder rotatably supports the base end of the bar, and the front end of the inner cylinder non-rotatably supports the lever adjacent to the bar, and when the inner cylinder and the lever rotate, the lever is locked. The mating part engages with the engaging part of the barbs to lock or unlock, and When the key is inserted, the master tumbler moves in the outer diameter direction, the tip of the master tumbler reaches the outer circumference of the front end of the outer cylinder, and the integrated outer cylinder and inner cylinder are made rotatable with respect to the master cylinder and case. It is characterized by being locked or unlocked. Further, the key can be locked or unlocked by rotating the key by 360 degrees, and the lock bar may be rotated by 90 degrees in conjunction with this. In addition, the other end of the tumbler is made narrower than the tip end side, and the narrow portion can be engaged / disengaged, and the escape groove that can prevent the inner cylinder from rotating by engaging the narrow portion is removed. It may be formed on the inner peripheral surface of the rear end of the cylinder on the side opposite to the lock groove.

[0005]

[Action]

 When the master key is inserted into the insertion hole, the master tumbler moves in the outer diameter direction, the tip of the master tumbler reaches the outer circumference of the front end of the outer cylinder, the tip of the lock pin retracts to the outer circumference of the front end of the outer cylinder, and the outer cylinder moves to the master cylinder and On the other hand, the tumbler at the rear end of the inner cylinder engages with the lock groove at the tip of the tumbler to prevent rotation of the inner cylinder. It becomes rotatable with respect to the case, the lever fixed to the front end portion of the inner cylinder rotates, and the engaging portion of the lever engages with the engaging portion of the bar, so that the disc tumbler lock is locked or unlocked. When the master key is removed from the insertion hole, the lock pin is urged in the axial direction by the lock pin spring, the tip of the lock pin reaches the outer circumference of the front end of the inner cylinder, and the master tumbler is stored in the inner cylinder. The outer cylinder cannot rotate with respect to the master cylinder and case, the inner cylinder cannot rotate with respect to the outer cylinder, the lever and bar also cannot rotate, and the disc tumbler lock is locked in the locked or unlocked state. .

On the other hand, when the change key is inserted into the insertion hole, it does not engage with the master tumbler, the master tumbler remains stored in the front end of the inner cylinder, and the outer cylinder cannot rotate with respect to the master cylinder and the case. The tumbler at the rear end of the inner cylinder is stored in the inner cylinder in association with the change key, and the rear end of the inner cylinder is rotatable with respect to the rear end of the outer cylinder. With respect to the disk tumbler lock, the lever fixed to the front end portion of the inner cylinder rotates, and the engaging portion of the lever engages with the engaging portion of the bar to lock or unlock the disc tumbler lock. When the change key is removed from the insertion hole, it does not engage with the master tumbler, the master tumbler remains stored in the front end of the inner cylinder, and the outer cylinder cannot rotate with respect to the master cylinder and the case. The tip of the tumbler at the end is urged by a spring to engage with the lock groove, and the rear end of the inner cylinder cannot rotate with respect to the rear end of the outer cylinder. It becomes immovable, the lever and bar are also unable to rotate, and the disc tumbler lock is locked in the locked or unlocked state.

According to the second invention of the present application, when the master key and the change key are rotated by 360 degrees, the lever and the lever engaging portion are rotated by 360 degrees, and the bar and bar engaging portion are interlocked with it. Is rotated 90 degrees, the disc tumbler lock is locked or unlocked.

Further, according to the third invention of the present application, the other end side of the tumbler is made narrower than the tip end side, and the narrow width portion can be engaged / disengaged, and the narrow width portion is engaged so that Since a relief groove that can prevent rotation of the cylinder is formed on the opposite side to the lock groove on the inner peripheral surface of the outer cylinder rear end, if you insert a change key that does not match the disc tumbler lock, the tip side of the tumbler will be locked. And the narrow portion on the other end side of the tumbler engages with the escape groove to prevent rotation of the inner cylinder. Also, even if you insert a change key that matches the disc tumbler lock and rotate it 180 degrees to remove the change key, the tip side of the tumbler does not engage with the narrow escape groove, and the disc tumbler lock does not change. The key cannot be locked without being locked or unlocked in the 180 degree rotated position.

[0009]

【Example】

 The disc tumbler lock according to the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 is a vertical sectional view of the disk tumbler lock 1, showing a state in which a master key MK is inserted. The inner cylinder 2 comprises a front end 2A having a small diameter and a rear end 2B having a large diameter, and the outer cylinder 3 comprises a front end 3A having a small outer diameter and a rear end 3B having a large outer diameter. ing. An insertion hole 11 for inserting a key is formed in the inner cylinder 2 in the axial direction.

The tumbler is disk-shaped (plate-shaped), with a plurality of tumblers 6 (six in the example shown) at the rear end and a plurality of master tumblers 7 (two in the example) at the front end. It is being touched. A vertical groove 8 into which the tumbler 6 is inserted back and forth is inserted into the rear end 2B of the inner cylinder, and a vertical groove 9 into which the master tumbler 7 is inserted forward and backward is inserted into the front end 2A of the inner cylinder. They are formed at equal intervals in each direction. A bottomed lock groove 10b with which the front end 6a of the rear end tumbler 6 engages is formed on the inner periphery of the outer cylinder rear end 3B, and the front end 7a of the master tumbler 7 engages with the outer cylinder front end 3A. The lock hole 10a is formed so as to penetrate from the inner circumference to the outer circumference.

Further, in the tumbler 6 at the rear end, as shown in FIG. 4, the front end 6a is wide and the other end 6d is narrow. A lock groove 10b with which the tip portion 6a can be engaged and a clearance groove 10c with which the other end portion 6d can be engaged are provided in the outer cylinder rear end portion 3B at opposing positions over the entire length. The tumbler 6 is attached to the shaft by a spring 15 arranged between the spring receiving portion 6b extending from one side in the vicinity of the tip portion 6a of the tumbler 6 and the spring seat in the vertical groove 8 of the inner cylinder rear end portion 2B. The tip portion 6a is adapted to be engaged with the lock groove 10b by being biased from the core side. The width of the vertical groove 8 is such that the tumbler 6 including the tip of the spring receiving portion 6b can freely move back and forth.

Further, as shown in FIG. 1, a master cylinder 4 is fitted around the outer circumference of the outer cylinder front end portion 3A. A cylindrical case 5 is fitted over the entire length of the outer circumference of the master cylinder 4 and the outer cylinder rear end portion 3B. The outer circumference of the master cylinder 4 is fixed to the inner circumference of the case 5, but the outer circumference of the outer cylinder front end 3A is rotated with respect to the inner circumference of the master cylinder 4, and the outer circumference of the outer cylinder rear end 3B is rotated with respect to the inner circumference of the case 5. You are free. The master cylinder 4 is provided at a corresponding position of the master tumbler 7 in the axial direction with a lock hole 10a penetrating the outer cylinder front end 3A, and a lock pin hole 12 is axially formed. ing. A lock pin 13 is inserted into the lock pin hole 12 so as to move back and forth, and is biased by a master spring 14 to press the master tumbler 7 in the axial direction. The width of the tip portion 7a of the master tumbler 7 and the diameter of the lock pin 13 are equal, and are set so that the tip portion 7a and the lock pin 13 can move back and forth within the lock hole 10a. Reference numeral 13a is a spring groove into which the spring 14 is inserted. Since the total length of the master tumbler 7 is set to be the same as the outer diameter of the front end 2A of the inner cylinder, in a natural state, the master tumbler 7 is pushed by the lock pin 13 urged by the spring 14 so that both ends of the master tumbler 7 are in the inner cylinder. The lock pin 13 coincides with the outer circumference of the front end portion 2A, the lock pin 13 does not enter the front end portion 2A of the inner cylinder, and the front end portion 2A of the inner cylinder is rotatable with respect to the front end portion 3A of the outer cylinder. Then, one set of the lock pin hole 12 and the lock hole 10a are arranged in two opposite positions offset from each other in the axial direction.

FIG. 5 is an exploded perspective view of the disc tumbler lock 1. A bar 16 is rotatably fitted into the inner cylinder front end portion 2A and has an engaging portion 16a. Reference numeral 17 denotes a lever that is fitted into the front end portion 2A of the inner cylinder and is non-rotatably fixed by a key 19 and has an engaging portion 17a. The engaging portion 17a of the lever 17 can be engaged with and disengaged from the engaging portion 16a of the bar 16 by rotating. Reference numeral 18 denotes a lock fixing plate which is inserted into a mounting groove 18a provided in the case 5 and fixed to a door or the like. Reference numeral 20 denotes a knock pin for preventing the master cylinder 4 from coming off from the case 5.

Further, since the disc tumbler lock 1 is fixed to the door or the like via the case 5, one set of the lock pins 13 is always on the upper side of the case 5 regardless of the rotation of the master key MK. The other set is on the underside. The upper position is the original position of rotation. Locking and unlocking can be performed by rotating the master key MK or the chain key CK 360 degrees from the original position. The bar 16 is set so that it can be opened and closed by turning 90 degrees according to the custom of the user. A lever 17 that engages with the bar 16 is provided adjacent to the bar 16 at the front end 2A of the inner cylinder, and the 360-degree rotation of the master key MK or the chain key CK and the 90-degree rotation of the bar 16 are interlocked.

FIG. 2 is a sectional view taken along line Y-Y in FIG. 1. FIG. 2A is a natural state before the master key MK is inserted, and FIG. Indicates a moving state. FIG. 3 is a vertical cross-sectional view of the disc tumbler lock 1, showing a state in which a chain key CK that does not match the disc tumbler lock is inserted. FIG. 4 is a sectional view taken along line X-X in FIG. 3. FIG. 4 (a) shows the natural state before inserting the change key CK, and FIG. 4 (b) shows the change change key CK matching the disc tumbler lock. Shows the status during rotation.

The operation of the disc tumbler lock 1 will be described below. With the master key MK removed, at the front end, the lock pin 13 and the master tumbler 7 are moved from the outer peripheral side to the inner side due to the biasing force of the spring 14, so the outer cylinder front end 3A is moved to the master cylinder 4 On the other hand, it is locked by the lock pin 13. In this state, the tip of the lock pin 13 is in contact with the outer circumference of the inner cylinder front end 2A and cannot enter the vertical groove 9, so that the inner cylinder front end 2A is always in contact with the outer cylinder front end 3A. It can be rotated. On the other hand, at the rear end portion, the tumbler 6 moves toward the outer peripheral side, that is, moves forward due to the biasing force of the spring 15, and the inner cylinder rear end portion 2B is locked to the outer cylinder rear end portion 3B. Is not rotatable (locked) with respect to the outer cylinder 3 and the master cylinder 4, the lever 17 and the bar 16 are also not rotatable, and the disc tumbler lock 1 is locked in an unlocked or locked state.

On the other hand, when the master key MK is inserted, the lock pin 13 moves from the inner side to the outer peripheral side through the master tumbler 7 at the front end portion, and the lock pin 13 is disengaged from the outer cylinder front end portion 3A. The lock between the cylinder front end 3A and the master cylinder 4 is released, and the outer cylinder front end 3A becomes rotatable with respect to the master cylinder 4. On the other hand, at the rear end, the tumbler 6 slides variously to lock the inner cylinder rear end 2B to the outer cylinder rear end 3B, but the outer cylinder rear end 3B always rotates with respect to the case 5. Since it is possible, since the front end portion 3A of the outer cylinder is rotatable with respect to the master cylinder 4, the outer cylinder 3 is rotatable. Since the inner cylinder 2 rotates integrally with the outer cylinder 3, the lever 17 and the engaging portion 17a fixed to the inner cylinder 2 can also rotate.

Then, when the master key MK is inserted in the locked state and rotated 360 degrees in the right direction (clockwise direction) when viewed from the insertion hole 11 side, the lever 17 and the engaging portion 17a rotate 360 degrees, and the bar is engaged. The engagement part 16a of 16 is engaged, the engagement part 16a and the bar 16 are rotated 90 degrees, and the engagement with the bar receiver (not shown) is released to unlock. On the other hand, when the master key MK is inserted in the unlocked state and rotated 360 degrees to the left (counterclockwise) when viewed from the insertion hole 11 side, the lever 17 and the engaging portion 17a rotate 360 degrees and the bar 16 The engaging portion 16a is engaged with the engaging portion 16a to rotate the engaging portion 16a and the bar 16 by 90 degrees, and the engaging portion 16a and the bar 16 are locked by engaging with a bar receiving member (not shown).

Next, when the chain key CK is inserted, it does not engage with the master tumbler 7 at the front end portion, so the master tumbler 7 remains stored in the inner cylinder front end portion 2A and the inner cylinder front end portion 2A moves outside. It remains rotatable with respect to the cylinder front end portion 3A. However, the tumbler 6 at the rear end is retracted and housed in the rear end 2B of the inner cylinder by engagement with the chain key CK, and the rear end 2B of the inner cylinder is rotatable with respect to the rear end 3B of the outer cylinder. . Therefore, the inner cylinder 2 is rotatable with respect to the outer cylinder 3, the lever 17 and the bar 16 are also rotatable, and the disk tumbler lock 1 can be locked or unlocked.

When the change key CK is pulled out from the insertion hole, it does not engage with the master tumbler 7, and the master tumbler 7 remains housed in the inner cylinder front end 2A, and the lock pin 13 locks the outer cylinder front end 3A. Is not rotatable with respect to the master cylinder 4, that is, the outer cylinder 3 is not rotatable with respect to the master cylinder 4 and the case 5, and the tip of the tumbler 6 at the inner cylinder rear end portion 2B is biased by the spring 15. By engaging with the lock groove 10b, the rear end portion 2B of the inner cylinder cannot rotate with respect to the rear end portion 3B of the outer cylinder, so that the inner cylinder 2 cannot rotate with respect to the outer cylinder 3, the master cylinder 4, and the case 5. The lever 17 and the bar 16 are also non-rotatable, and the disc tumbler lock 1 is locked in the locked or unlocked state.

Further, since the tip end portion 6a of the tumbler 6 is wide and the other end portion 6d is narrow, the tumbler 6 is retracted and stored in the inner cylinder rear end portion 2B by the engagement with the chain key CK. Even if the chain key CK and the inner cylinder 2 are rotated 180 degrees and the chain key CK is pulled out, the tip portion 6a does not engage with the escape groove 10c, and the disc tumbler lock 1 is locked without being locked or unlocked. It does not malfunction.

Further, in the illustrated example, two sets of the master tumbler 7 and the lock pin 13 are arranged at opposed positions by being shifted in the axial direction, thereby improving the certainty of locking. If there are three or more pairs, the certainty will be further improved. In addition, in the above-mentioned embodiment, the barb 16 is configured to be rotated by 90 degrees, but it is not limited to this, and it is needless to say that it may be set to another angle.

[0023]

[Effect of device]

 As described above, according to the present invention, when the master key that engages only with the master tumbler is used, the outer cylinder becomes integral with the inner cylinder and can rotate with respect to the master cylinder and the case, so that the disk tumbler can be rotated. Since the lock can be locked or unlocked, it is an inexpensive disc tumbler lock, and the master key can be used with a simple structure, reducing the cost and greatly increasing the variety of chain key that can be shared with one master key. Can be increased. Further, since the plurality of master tumblers and the lock pins are arranged in the opposite positions so as to be displaced in the axial direction, the reliability of the lock of the master device can be improved and the safety can be improved.

Also, since the tip of the tumbler is wide and the other end is narrow, even if the chain key and the inner cylinder are rotated 180 degrees and the chain key is removed, the tip of the tumbler engages with the escape groove. Therefore, it is possible to prevent a malfunction such as the disc tumbler lock being locked without being locked or unlocked.

[Brief description of drawings]

FIG. 1 is a horizontal cross-sectional view showing a state in which a master key of a disc tumbler lock according to the present invention is inserted.

2 is a sectional view of the disc tumbler lock according to the present invention as viewed in the Y-Y direction in FIG. 1, (a) is a sectional view showing a natural state in which a master key is not inserted, and (b) is a master key inserted. It is sectional drawing which shows the state in which it is rotating.

FIG. 3 is a horizontal cross-sectional view of a disk tumbler lock according to the present invention in which the change key is inserted.

FIG. 4 is a sectional view of the disk tumbler lock according to the present invention as seen in the X-X direction in FIG. 3, (a) is a sectional view showing a natural state in which a change key is not inserted, and (b) is a change key inserted. It is sectional drawing which shows the state in which it is rotating.

FIG. 5 is an exploded perspective view of a disk tumbler lock according to the present invention, which is horizontally long.

[Explanation of symbols]

 1 Cylinder Lock 2 Inner Cylinder 2A Inner Cylinder Front End 2B Inner Cylinder Rear End 3 Outer Cylinder 3A Outer Cylinder Front End 3B Outer Cylinder Rear End 4 Master Cylinder 5 Case 6 Tumbler 7 Master Tumbler 8, 9 Vertical Groove 10a Lock Hole 10b Lock groove 10c Escape groove 11 Insertion hole 12 Lock pin hole 13 Lock pin 14,15 Spring 16 Bart 16a Bart engaging part 17 Lever 17a Lever engaging part 18 Lock fixing plate 19 Key 20 Knock pin MK Master key CK Chain key

Claims (3)

[Scope of utility model registration request] 1. A lock groove is formed in the inner peripheral surface of an outer cylinder fitted in the inner cylinder in the axial direction, and an insertion hole for inserting a key is formed in the inner cylinder in the axial direction, and a shaft orthogonal to the insertion hole. In the axial direction, a disk-shaped tumbler whose overall length is equal to the outer diameter of the inner cylinder is formed with vertical grooves that can move forward and backward at equal intervals, and the tumblers fitted in the vertical grooves are urged in the axial direction by the elastic force of the spring. In a disk tumbler lock that locks the inner cylinder with the tumbler tip engaging the lock groove, a cylindrical case is fitted onto the outer cylinder, and a master cylinder is fitted between the front end of the outer cylinder and the case. The outer circumference of the front end of the outer cylinder with respect to the inner circumference of the master cylinder.
The outer periphery of the rear end of the outer cylinder is rotatable with respect to the inner periphery of the case. The tumblers at the front ends of the inner cylinder and outer cylinder are master tumblers that can be engaged only by the master key. A hole for a lock pin is drilled in the axial direction on
A lock hole is formed through the front end of the outer cylinder in the axial direction, and one set of lock pin holes and lock holes are offset in the axial direction, and a plurality of sets are arranged at opposite positions. The pin is slidably inserted, the lock pin is urged in the axial direction by the lock pin spring, and the master tumbler is housed in the inner cylinder. The tumbler at the rear end of the inner cylinder and outer cylinder is A plurality of tumblers that can be housed in the inner cylinder by engaging them are provided, and the base end of the bar is rotatably supported at the front end of the inner cylinder, and the front end of the inner cylinder is adjacent to the bar. When the inner cylinder and lever rotate, the lever's engaging part engages with the barb's engaging part to lock or unlock, and when the master key is inserted, the master tumbler is opened. The tip of the master tumbler moves in the outer diameter direction and the front end of the outer cylinder Reached circumference and rotatable formed by locking or unlocking with respect to the outer cylinder and the inner cylinder, which is integral master cylinder and the case, disc tumbler lock with the master device, characterized in that. 2. The disc tumbler lock with a master device according to claim 1, wherein locking or unlocking is possible by rotating the key by 360 degrees, and the barb is rotated by 90 degrees in conjunction with this. 3. A clearance groove in which the other end side of the tumbler is narrower than the front end side, the narrow width portion can be engaged / disengaged, and the rotation of the inner cylinder can be prevented by engaging the narrow width portion. The disk tumbler lock with a master device according to claim 1 or 2, wherein the disk tumbler lock is formed on the opposite side of the inner peripheral surface of the outer cylinder from the lock groove.