JP4370233B2 - Disc tumbler tablets - Google Patents

Description

  The present invention relates to a disc tumbler lock of a slide type, a swing type, a cam lock type or the like that employs an inner cylinder removable cylinder lock and can be easily replaced even when a key is lost or a user is changed.

  Conventionally, at the time of locking, the disk tumbler is projected from the inner cylinder to the groove of the outer cylinder by the elastic force of the coil spring so that the inner cylinder does not rotate. As a well-known technique, there is a disc tumbler lock that is moved to the position of the outer cylinder and retracted from the groove of the outer cylinder so that the lock can be unlocked.

  For example, as shown in Patent Document 1, an outer cylinder having an engaging groove for locking in the axial direction of the inner circumferential surface, a pivotable arrangement inside the outer cylinder, and a key side surface in the key insertion hole inside. And an inner cylinder having a plurality of tumbler insertion holes that are perpendicular to the key insertion hole and that have both end portions penetrating the outer peripheral surface at intervals in the axial direction. It is slidable in the hole and is urged in one direction by a coil spring so as to be freely disengaged from the engaging groove for locking. A key insertion hole is formed at a substantially central portion, and an inner surface thereof is provided in the groove portion of the key. A cylinder lock comprising a plurality of tumblers each having an engaging convex portion provided on one side of a key insertion hole, which is operated by a protruding portion and a concave portion having different shapes. Each tumbler insertion hole has two tumblers in a polymerized state. The spring receivers are respectively formed on the side surfaces of the tumblers in pairs and the left and right sides of each tumbler insertion hole, and the coil springs having a diameter approximately the same as the plate thickness of the tumbler are attached to the both tumblers. A cylinder lock is known that is interposed between spring receivers.

Moreover, as shown in Patent Document 2, a cylindrical case is externally fitted to the outer cylinder, the master cylinder is fitted between the outer cylinder front end and the case, and the master cylinder outer periphery is fixed to the case inner periphery, The outer periphery of the front end of the outer cylinder is rotatable with respect to the inner periphery of the master cylinder, the outer periphery of the outer cylinder rear end is rotatable with respect to the inner periphery of the case, and the tumbler at the front end is a master tumbler that can be engaged only with the master key. A plurality of cylinders are urged in the axial direction via a lock pin inserted into a lock pin hole drilled in the axial direction in the master cylinder, and only the change key can be engaged with the tumbler at the rear end. There is also known a disk tumbler lock with a master device, which is a tumbler and a plurality of tumblers are arranged.
Japanese Utility Model Publication No. 7-34177 Japanese Utility Model Publication No. 6-20812

  However, in the conventional disk tumbler lock shown in the above-mentioned document 1, each of a set of two tumblers includes a protrusion and a recess provided on one side of the key insertion hole so as to face the groove on one side of the key. Since only the engaging convex portion to be operated is provided, the number of key conversions is naturally limited, and a key difference sufficient to effectively incorporate the master key system cannot be obtained.

  On the other hand, the conventional disc tumbler lock with a master device shown in the above-mentioned document 2 is provided with a master tumbler that can be engaged only by a master key separately from a tumbler that can be engaged only by a change key, and is fitted with a master tumbler. Since a member such as a master cylinder and a lock pin is provided, the entire key becomes complicated, and there is a problem that the manufacturing cost increases.

  Therefore, the present invention has been made in view of the problems of the conventional techniques described above, and a key difference sufficient to effectively incorporate a master key system with a single key can be obtained, and the entire key is simple. An object of the present invention is to provide a disc tumbler tablet that is inexpensive to manufacture.

In order to solve the above-described problems, in the present invention, an outer cylinder that is attached to a predetermined lock installation position of an opening / closing door and has grooves that allow the upper and lower ends of a plurality of disc tumblers to be advanced, and an outer cylinder And a plurality of disc tumblers that are housed in a hollow space formed in the upper and lower openings formed in the inside and arranged in a row , and each disc tumbler is a set of two Are slidably in close contact with each other and are biased by springs that are obliquely interposed so as to repel each other in the vertical direction. The upper end of one disc tumbler and the lower end of the other disc tumbler are In the disc tumbler lock that separately advances into the groove of the cylinder and prevents the inner cylinder from rotating,
Each disc tumbler is engaged with the one-side edge of the keyhole drilled in the center by selecting either the master key or the slave key according to the purpose, and the probe groove on one side of the selected key Protruding parts are provided, and on the other side edge of the opening of the keyhole, a step part that engages the probe groove on the other side of the key is provided. In this state, the two sheets are slidably brought into close contact with each other .

  In the disc tumbler lock according to the present invention configured as described above, when the master key or the slave key is inserted into the keyhole, the probing grooves provided on both sides of the master key or the slave key inserted into the keyhole, and the keyhole Two sets of each disk tumbler are separately retracted and retracted against the elastic force of the coil spring in the hollow part of the inner cylinder according to the engagement with the protrusions and stepped parts provided on both sides The engagement between each cylinder-side disc tumbler and the groove of the outer cylinder is released, and the inner cylinder can be rotated with respect to the outer cylinder, and unlocking or locking is performed.

  On the other hand, after locking with the rotary lever, the inner groove is disengaged according to the disengagement between the probing grooves provided on both sides of the master key or the slave key pulled out from the keyhole and the protrusions and stepped portions provided on both sides of the keyhole. From the hollow part of the cylinder into the groove of the outer cylinder, depending on the urging force, each set of two disk tumblers is advanced separately, and each disk tumbler on the inner cylinder side and the groove of the outer cylinder engage with each other. The inner cylinder is prevented from rotating relative to the cylinder so that it cannot be unlocked.

  As described above, in the present invention, each disc tumbler selects either the master key or the slave key according to the purpose at the opening side edge of the keyhole drilled in the center, and selects the selected key. Protrusions that engage the probing groove on one side of the key are provided, and a step part that engages the probing groove on the other side of the key is provided on the other side edge of the key hole opposite to this In addition, since the plurality of disc tumblers formed by shifting the protrusions and the step portions to each other in the vertical position are provided, the key difference can be remarkably increased as compared with the conventional disc tumbler lock. Therefore, it is possible to form a highly safe master system with a simple configuration, a low manufacturing cost, and no separate master device.

  The best mode for carrying out the present invention will be described below with reference to the drawings. The reference numeral 1 shown in the figure should be easily replaceable when, for example, a key is lost or a user is changed. This is a cam lock type disc tumbler lock that adopts an inner cylinder removable cylinder shape. Note that the disk tumbler lock may have a locking / unlocking structure such as a slide lever type or a swing lever type.

  As shown in FIGS. 1 to 6, the disc tumbler lock 1 is attached to a predetermined lock installation position of the opening / closing door P by a mounting frame member 5 having a plurality of claw-like push stoppers 4, and a plurality of disc tumbler locks 1 are attached to upper and lower inner walls. Of the disk tumblers 6A, 6B, 6C... Are provided with an outer cylinder 2 formed with grooves 7 that allow the upper and lower ends of the disk tumblers 6 to advance, and a rotary lever 8 having a rotation angle range of 90 ° for locking. A plurality of disc tumblers 6A, 6B, 6C,... Are accommodated in a hollow portion 9 that is rotatably inserted and is formed inside and that is open at the top and bottom. In FIG. 2, 21 indicates a nut, and 22 indicates a mounting screw.

  As shown in FIGS. 2 to 6, each disk tumbler 6A, 6B, 6C,... Is slidably brought into close contact with each other so that the lower side of the convex portion 11A on one side and the convex portion on the other side. Coil springs 12 are obliquely interposed between the upper portions of the portions 11B and repel each other up and down, so that the upper end of one disc tumbler 6A and the lower end of the other disc tumbler 6B are separated into the groove 7 of the outer cylinder 2 separately. The inner cylinder 3 is prevented from rotating after it has advanced.

  The disc tumblers 6A, 6B, 6C,... Are each drilled with a key hole 14 into which the master key Q1 or the slave key Q2 is inserted, and inserted into the inner cylinder 3 by inserting either the master key Q1 or the slave key Q2. On the other hand, each set of two disk tumblers 6A, 6B, 6C,... Can be moved separately, and one side has square projections 11A, 11B for engaging the coil spring 12, and the other side. Each of the disc tumblers 6A, 6B, 6C,... Is provided with an engagement notch 16 that can be fitted with a locking rod 15 for preventing the disc tumblers 6A, 6B, 6C.

As a specific configuration of the keyhole 14 of the disk tumblers 6A, 6B, 6C..., The master key Q1 or the key stub 6A, 6B, 6C. A protrusion 17 is provided to engage with the probing groove 23 on one side of the child key Q2, and the probing groove 17 on the other side of the opening of the key hole 14 is opposed to the protuberance 17 on the other side of the parent key Q1 or the child key Q2. A step portion 18 with which 13 is engaged is provided. Then, the disc tumblers 6A, 6B, 6C shown in FIGS. 4B, 4D, and 4F are turned upside down with respect to the disc tumblers shown in FIGS. They are arranged in close contact with each other in the hollow portion 9 so that the upper end of one disc tumbler 6A and the lower end of the other disc tumbler 6B can protrude from the respective upper and lower openings of the inner cylinder 3 and can be retracted from the opening toward the hollow portion 9 side. It is.

  As shown in FIGS. 5 and 6, a plurality of disc tumblers 6A, 6B, 6C... Formed by shifting the protrusions 17 and the step portions 18 to each other in the vertical position, for example, two sets of five are used. Thus, the hollow portion of the inner cylinder 3 according to the engagement between the probing grooves 13 and 23 on both sides of the master key Q1 or the slave key Q2 inserted into the keyhole 14 and the protrusions 17 and stepped portions 18 on both sides of the keyhole 14 respectively. .. Each pair of disk tumblers 6A, 6B, 6C... Is separately housed and retracted against the elastic force of the coil spring 12, and the disk tumblers 6A, 6B, 6C. The engagement of the outer cylinder 2 with the groove 7 is released so that the inner cylinder 3 and the rotation lever 8 can freely rotate with respect to the outer cylinder 2 within a 90 ° angle range.

  On the other hand, the hollow portion of the inner cylinder 3 according to the disengagement between the probing grooves 13 and 23 on both sides of the master key Q1 or the slave key Q2 pulled out from the keyhole 14 and the protrusions 17 and stepped portions 18 on both sides of the keyhole 14 respectively. Each set of two disk tumblers 6A, 6B, 6C... Is advanced separately from the inside of the groove 9 into the groove 7 of the outer cylinder 2 by the spring force of the coil spring 12, and each disk tumbler on the inner cylinder 3 side is advanced. 6A, 6B, 6C... And the groove 7 of the outer cylinder 2 are engaged so that the inner cylinder 3 and the rotating lever 8 do not rotate with respect to the outer cylinder 2.

  Thus, by inserting the master key Q1 or the slave key Q2 into the key hole 14, the inner cylinder 3 and the rotary lever 8 are rotatable with respect to the outer cylinder 2, and unlocking is performed. After locking by the rotary lever 8, the key hole 14 is unlocked. The master key Q1 or the child key Q2 can be extracted from the.

  As shown in FIG. 7, the probing groove 13 of the master key Q1 has a stepped portion provided on one side of the side of the strip plate 6A, 6B, 6C. 18 is formed so as to engage with a protrusion 17 provided at the other edge of the opening of the key hole 14 of each disk tumbler 6A, 6B, 6C. .

  The probing grooves 13 formed on the upper and lower sides of one side of the band plate are formed with notches 13a and 13a having concave and convex notches 13b and 13b on the bottom, respectively, and the probing grooves formed in the center of the other side of the band plate 13 is formed with a concave groove 13c provided with protruding walls 13d, 13d having wide intervals.

  On the other hand, as shown in FIG. 8, the probing groove 23 of the child key Q2 is a projection provided at one side edge of each key hole 14 of each disk tumbler 6A, 6B, 6C. It is formed so as to be engaged with the portion 17, and is formed so as to be engaged with the stepped portion 18 provided on the other side edge of the opening of each key hole 14 of each disk tumbler 6A, 6B, 6C. Has been.

  The probing groove 23 formed in the center of one side surface of the strip is formed with a concave groove 23a provided with concavity and convexity indentations 23b, 23b of narrow intervals, and the probing grooves 23 formed on the upper and lower sides of the other side surface of the strip. Is formed with notches 23c and 23c provided with smooth surfaces 23d and 23d at the bottom.

  The shape of the search groove 13 of the master key Q1 and the search groove 23 of the slave key Q2 may be formed opposite to each other. Further, the main key Q1 or the small key Q2 is small so that the main key Q1 or the sub key Q2 is not inserted in the left and right direction into the opening edge of the inner cylinder side keyhole 3B drilled in the center of the enlarged diameter part 3A formed at the front end of the inner cylinder 3. A protrusion-like locking claw 3C is provided.

Next, the use and operation of the disc tumbler lock 1 having the above-described configuration will be described.
First, the master key Q1 from the keyhole 3B of the inner cylinder 13 to each keyhole 14 of each disc tumbler 6A, 6B, 6C..., The notch 13a, 13a side of one probing groove 13 faces the step portion 18, and the other When the probing groove 13a is inserted so that the concave groove 13c side faces the protrusion 17, the concave and convex notches 13b at the bottoms of the notches 13a and 13a are sequentially engaged with the stepped portions 18 from the front to the rear, while the concave The grooves 13c are sequentially engaged with the protrusions 17 from the front to the rear.

  Then, in accordance with each engagement, two sets of each of the disk tumblers 6A, 6B, 6C,... Are separately stored and retracted in the hollow portion 9 of the inner cylinder 3 against the elastic force of the coil spring 12. The disc tumblers 6A, 6B, 6C,... And the groove 7 of the outer cylinder 2 are released, and the inner cylinder 3 and the rotation lever 8 can be rotated with respect to the outer cylinder 2 to be unlocked or locked. Is done.

  On the other hand, the master key Q1 can be pulled out from the keyhole 14 after locking by the rotary lever 8. At this time, each part of the probing groove 13 of the master key Q1 pulled out from the key hole 14 and the projection 17 and the stepped part 18 of the key hole 14 are disengaged from the inside of the hollow part 9 of the inner cylinder 3 Each set of two disk tumblers 6A, 6B, 6C... Separates into the groove 7 of the cylinder 2 depending on the elastic force of the coil spring 12, and the disk tumblers 6A, 6B, 6C. The groove 7 of the cylinder 2 is engaged, and the inner cylinder 3 and the rotation lever 8 do not rotate with respect to the outer cylinder 2 and the unlocking state cannot be achieved.

  Next, the slave key Q2 is arranged so that the groove 23a side of one of the search grooves 23 faces the protrusion 17 of each key hole 14, and the notches 23c and 23c of the other search groove 23 face the step part 18. Then, the concave and convex notches 23b and 23b on both sides of the concave groove 23a are sequentially engaged with the protrusions 17 from the front to the rear, while the smooth surfaces 23d and 23d at the bottoms of the notches 23c and 23c are the stepped portions 18 respectively. Engage sequentially from the front to the rear.

  Then, in accordance with each engagement, the engagement between the disc tumblers 6A, 6B, 6C... And the groove 7 of the outer cylinder 2 is released, and the inner cylinder 3 and the rotation lever 8 can rotate with respect to the outer cylinder. The unlocking or locking is performed as in the case of the parent key Q1.

  As described above, the probing groove 13 in the master key Q1 and the probing groove 23 in the child key Q2 may be switched to the opposite sides. Of course, the shape of each of the search grooves 13 and 23 is not limited to the illustrated example.

  Further, in the embodiment shown in FIG. 2, since ten disc tumblers 6A, 6B, 6C,... Are used in total, three probe grooves 13 for the master key Q1 and the slave key Q2 shown in FIGS. Then, the number of subkey conversions is 3 to the 10th power = 59,049, and the number of parent key conversions is the 10th power of 2 = 1,024. When a total of 14 disc tumblers 6A, 6B, 6C,... Are used, the number of subkey transformations is 3 14 = 4,782,969, and the number of parent key transformations is 2 14, 16,384.

BRIEF DESCRIPTION OF THE DRAWINGS The use state of the cam lock-type disc tumbler lock in the best form for implementing this invention is shown, (a) is a side view, (b) is a front view, (c) is a rear view. Similarly, a cam lock type disk tumbler lock is shown, in which (a) is an exploded perspective view when a master key is used, and (b) is an exploded perspective view when a slave key is used. Similarly, it shows an example of the inner cylinder, (a) is a side view, (b) is an AA cross-sectional view in (a), (c) is a BB cross-sectional view in (b), (d) (C) is a CC cross-sectional view in (b), (e) is a DD cross-sectional view in (b), and (f) is an EE cross-sectional view in (b). (A) thru | or (b) show an example of a structure of a disk tumbler. An example of an outer cylinder is shown, (a) is a longitudinal cross-sectional view, (b) is AA sectional drawing in (a). FIG. 5A also shows the mutual movement state of a set of two disk tumblers, (a) is a front view of the disk tumblers before retracting the inner cylinder side, and (b) is a front view of the disk tumblers after retracting the inner cylinder side. FIG. Similarly, an example of the master key is shown, in which (a) is a plan view on one side face, and (b) is a plan view on the other side face. Similarly, an example of a child key is shown, (a) is a plan view on one side, and (b) is a plan view on the other side.

P Opening / closing door Q1 Master key Q2 Child key 1 Disc tumbler lock 2 Outer cylinder 3 Inner cylinder 3A Expanded part 3B Inner cylinder side keyhole 3C Locking claw part 4 Push stopper 5 Mounting frame members 6A, 6B, 6C Disc tumbler 7 Groove 8 Rotating lever 9 Hollow part 11A, 11B Convex part 12 Coil spring 13 Protrusion groove 13a Notch 13b Concave notch 13c Concave groove 13d Projection wall 14 Key hole 15 Locking rod 16 Engagement notch part 17 Protrusion part 18 Step part 23 Probing groove 23a Concave part Groove 23b Unevenness notch 23c Notch 23d Smooth surface

Claims (1)

An outer cylinder that is attached to a predetermined lock installation position of the opening and closing door and has grooves that allow the upper and lower ends of a plurality of disc tumblers to be advanced, and an upper and lower that are rotatably inserted into the outer cylinder and formed inside An inner cylinder in which a plurality of disc tumblers are housed in a row in an open hollow portion, and each disc tumbler is slidably in close contact with each other, and each other is vertically It is energized by a spring installed diagonally so as to repel in the direction, and the upper end of one disc tumbler and the lower end of the other disc tumbler advance separately into the groove of the outer cylinder to prevent the inner cylinder from rotating Disc tumbler tablets
Each disc tumbler is engaged with the one-side edge of the keyhole drilled in the center by selecting either the master key or the slave key according to the purpose, and the probe groove on one side of the selected key Protruding parts are provided, and on the other side edge of the opening of the keyhole, a step part that engages the probe groove on the other side of the key is provided. A disc tumbler tablet , wherein two discs are slidably brought into close contact with each other when they are shifted to each other .

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