JP2003239577A - Rotary disc tumbler lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary disc tumbler lock hardly unlocked by picking. <P>SOLUTION: A floating pin 14 longer than a thickness of a duplicate key 6 is mounted to the duplicate key 6 freely movably, while in a partition plate 15 on the interior side one among a pair of partition plates forming a slot for housing a selected rotary disc tumbler 200, a shelf part 23 engaging with one end of the floating pin and guiding it to adjust it to the opening end edge of a key hole 5 is formed on the exterior side of a part interfering with a moving locus of one end of the floating pin 14. When the rotary disc tumbler lock is locked/unlocked, the floating pin 14 is driven in the longitudinal direction by the engagement with the shelf part 23, and by means of the other end of the floating pin 14, an unlocking cutout 4 of the selected rotary disc tumbler 200 is matched with the inside edge of the locking bar 11, while an opening end edge of a key insertion hole 1 is shielded by the partition plate on its front side. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an improvement of a novel rotary disk tumbler lock proposed by the present applicant, and more particularly to an incorrect answer called picking. The present invention relates to a rotary disk tumbler lock which makes locking difficult. [0002] The present applicant has previously filed Japanese Patent Application No. 2001-31.
No. 6885, a new rotary disk tumbler lock has been proposed which is an improvement over the conventional so-called lever tumbler lock (rotary disk cylinder lock). [0003] This rotary disk tumbler lock is
An outer cylinder having a cam groove formed along the generatrix of the inner peripheral surface, and a plurality of partition plates which are rotatably fitted to the outer cylinder and stacked in the center axis direction with a gap provided between the outer cylinder and the center axis. And an outer edge extending along the generatrix of the inner cylinder and guided radially movably at an outer peripheral portion of the inner cylinder and engaging with the cam groove. And a locking bar urged in a direction to protrude outward, and an annular rotary disc tumbler in which a key insertion hole large enough to surround the key hole is formed in the center of each slot between the partition plates. And one of its substantial parts is pivotally supported by a pivot that penetrates the inner cylinder in the axial direction, and an unlocking notch is formed at the outer edge of the free end. At the opening edge of the insertion hole, the moving trajectory of the tip is the flat part of the duplicate key blade inserted into the keyhole. Is provided with an integral projection that interferes with the edge, and urges each rotary disk tumbler in the direction in which the engagement projection approaches the key, and normally a backup pin that penetrates the inner cylinder in the axial direction. ,
On the other hand, when each of the engaging protrusions of the tumbler group engages with the corresponding recess formed in the duplicate key blade inserted into the keyhole, the unlocking notch of each rotary disk tumbler is aligned with the inner edge of the locking bar. It is characterized by matching. The rotary disk tumbler lock described above can be further summarized as follows. As shown in FIG. 1, an annular rotary disk tumbler 2 having a key insertion hole 1 large enough to surround a key hole in a central portion is supported. While being pivotally supported on the shaft 3, an unlocking notch 4 is formed at the outer edge of the free end, while the movement trajectory of the tip is inserted into the keyhole 5 at the opening edge of the key insertion hole 1. An engagement projection 7 that interferes with the flat portion or the edge of the blade of the duplicate key 6 is integrally protruded, and each rotary disk tumbler 2 is urged in a direction in which the engagement projection 7 approaches the duplicate key 6. Normally, the rotary pins are locked to the backup pins 8. On the other hand, when each of the engaging projections of the tumbler group engages with the corresponding recess 9 formed in the blade of the duplicate key 6 inserted into the key hole 5, each rotary Disk tumbler solution The notch 4 is intended to align with the inner edge of the locking bar 11. SUMMARY OF THE INVENTION The present invention provides a rotary disk tumbler lock in which a floating pin mechanism is incorporated in the rotary disk tumbler lock to make unauthorized unlocking so-called picking more difficult. It is an object. [0006] In order to achieve the above object, an invention according to claim 1 is an invention in which an outer cylinder having a cam groove formed along a generatrix on an inner peripheral surface, and an outer cylinder having a cam groove formed therein. Rotatably fit,
A plurality of partition plates laminated in the center axis direction with a gap provided, an inner cylinder having a keyhole penetrated along the center axis, and an inner cylinder extending along a generatrix of the inner cylinder, A locking bar urged in a direction in which the outer edge engaged with the cam groove is outwardly protruded and guided in a radially movable manner in the portion, and a central portion is provided in each slot between the partition plates. An annular rotary disc tumbler with a key insertion hole large enough to surround the key hole is inserted into the part, and one part of its actual part can be swung by a spindle that penetrates the inner cylinder in the axial direction. The unlocking notch is formed at the outer edge of the free end portion while supporting the shaft, while the moving trajectory of the tip is located at the flat edge or the edge of the double key blade inserted into the keyhole at the opening edge of the key insertion hole. The engaging projections that interfere with the This engagement projection urges in the direction approaching the duplicate key, and normally locks the inner cylinder to a backup pin that penetrates in the axial direction, while each of the engagement projections of the tumbler group engages with the keyhole. The rotary notch of each rotary disc tumbler aligns with the inner edge of the locking bar when engaged with a corresponding recess formed in the inserted keyhole blade, wherein at least one of the keyhole blades A floating pin longer than the thickness of the blade, one end of which is aligned with the opening edge of the key insertion hole of the selected rotary disc tumbler in the axial direction of the inner cylinder when inserted into the keyhole, is extended through the blade. Support so that it can move in the opposite direction,
The partition on the inner room side of the pair of partitions forming the slot in which the selected rotary disc tumbler is stored is designated as the selected partition, and the other end of the floating pin of the selected partition is specified. On the outside of the part that interferes with the movement trajectory, a shelf is formed to engage with the other end of the floating pin and guide it so as to align it with the opening edge of the keyhole. On the partition plate on the outdoor side, a relief notch that allows the floating pin to slip through is formed, and the portion of the opening edge of the key insertion hole of the selected rotary disk tumbler, which is in contact with one end of the floating pin, When the duplicate key is inserted and pushed by one end of the floating pin, the unlock notch of the selected rotary disc tumbler Characterized in that molded to match. An embodiment of the present invention will be described below with reference to FIGS. In FIG. 2, reference numeral 6 designates a duplicate key of a rotary disk tumbler lock according to an embodiment of the present invention. This duplicate key is obtained by integrally combining a blade 12 and a knob 13 like a conventional rotary disk tumbler lock. is there. A depression 9 (see FIG. 1) in at least one portion of the blade 12 (the tip of the blade in the illustrated embodiment).
The floating pin 14 is supported at the portion where the is to be formed so as to be movable in the thickness direction of the blade (the direction of the paper surface of FIG. 2). In this case, the innermost rotary disk tumbler 2, in other words, the innermost rotary disk tumbler, is selected as the one corresponding to the floating pin. Let's call it 200. Needless to say, when the duplicate key is inserted into the keyhole, the floating pin 14 is aligned with the opening edge of the key insertion hole 1 of the selected rotary disc tumbler 200. As shown in FIG. 3, the floating pin 14 has, for example, one end (the left floating pin 14).
Is formed into a truncated conical shape, a large-diameter thick flange portion is integrally connected to the other end, and a part of a spherical surface is integrally formed at the other end. The reason why the pair of floating pins 14, 14 are arranged point-symmetrically with respect to the center axis of the inner cylinder in FIGS. 2 and 3 is that the duplicate key of the rotary disk tumbler lock is a reversible key, that is, a blade. 12
Can be unlocked even if it is turned over and inserted into the keyhole 5. The floating pins 14,
In order to attach the floating pin 14 to the blade 12, for example, an unnumbered stepped pin hole that loosely fits with the floating pin 14 is formed so as to penetrate the blade 12, and after inserting the floating pin 14 into this pin hole, The large diameter opening edge of the pin hole is swaged so as to protrude inward. The length of the floating pin 14, that is, the vertical dimension in FIG. 3 is set to be larger than the thickness of the double key blade 12. Therefore, in a normal state where no external force acts on the floating pin 14, both ends of the floating pin 14 protrude outward from the surface of the blade 12 as shown. The rotary disk tumbler lock in the illustrated embodiment is inserted into the keyhole 6 with the blade of the duplicate key 6 being horizontal, as shown in FIG. 3, for example.
In this type, the position of the floating pin 14 is controlled by constantly urging it downward by the acceleration of gravity. On the other hand, the structure of a rotary disk tumbler lock to which the present invention is applied is the same as that of a conventional lever tumbler lock using a C-shaped lever tumbler, and is well known and attached to the aforementioned Japanese Patent Application No. 2001-316885. Briefly described in detail in the specification and drawings, as shown in FIG. 4, a plurality of partition plates 15, 15 (see FIGS. 1 and 5), a key guide 16 and a tail plug 17 are retained by a retainer. The inner cylinder 19 is constituted by being connected to each other at a predetermined gap by 18, 18 (see FIG. 1), and the inner cylinder 19 is rotatably fitted to the outer cylinder 21. The rotary disk tumbler 2 is accommodated in each of the slots 22 formed between the partition plates 15 and 15 in the above-described manner. As described above, since the selected rotary disk tumbler 200 is the innermost one, the partition plate 15 and the tail plug 17 form the slot 22 that stores the rotary disk tumbler 200. However, since the tail plug 17 also functions as a partition plate, members on both sides of the slot 22, including the key guide 16 at the front end, will be referred to as partition plates. In the illustrated embodiment, a pair of partition plates forming a slot for accommodating the selected innermost rotary disk tumbler 200 (in the illustrated embodiment, the tail plug 17). ) Is designated as the selected partition. As shown in FIGS. 4 and 7, the tail plug 17 as the selected partition plate is located on the outdoor side of a portion that interferes with the movement locus of the other end (lower end) of the floating pin 14, as shown in FIGS. A shelf 23 is formed so as to project toward the outdoor side. As shown in FIGS. 4 and 7, the shelf 23 is formed so as to be in contact with the lower edge of the opening forming the key hole of the partition plate 15 (tail plug 17). Is guided by the wedge effect generated by the engagement between the chamfered portion 26 formed on the shelf portion and the lower spherical surface portion of the floating pin 14, for example, so as to align it with the opening edge of the keyhole. Is what you do. On the other hand, as described above, since the length of the floating pin 14 is longer than the thickness of the double key blade 12 (see FIG. 3), if the cross-sectional shape of the keyhole is the same as that of the conventional rotary disk tumbler lock, the floating pin 14 will float. Pin 14
Cannot interfere with the opening edge of the keyhole and cannot insert the duplicate key into the keyhole. Therefore, as shown in FIG. 5, a floating pin 14 is provided at the opening edge of the key hole 5 of the front partition plate 15, 5 (16) located outside the tail plug 17 as the selected partition plate. Escape notch 24 that can get through
Is formed. However, there is a possibility that the floating pin 14 may move in the length direction of the partition plate facing the selected rotary disk tumbler 200 because the floating pin 14 may move in the longitudinal direction when the partition plate passes through the partition plate. Board 15
Recess 25 on the back side (inside of the room) (see FIGS. 4 and 5)
Should be formed. The portion of the selected rotary disc tumbler 200 which is in contact with one end of the floating pin of the key insertion hole 1 is unlocked when the duplicate key is inserted and pushed by one end of the floating pin. It is formed so as to be aligned with the inner edge of the bar 11. The rotary disk tumbler lock according to one embodiment of the present invention having the above-described configuration is configured such that the rotary disk tumblers 2 and 2 other than the rotary disk tumbler 200 selected at the time of inserting the duplicate key have the duplicate key depression 9.
To align the unlocking notch 4 with the inner edge of the locking bar 11. Since the selected rotary disc tumbler 200 is located at the innermost position in the illustrated embodiment, as shown in FIG. 6, a part of the selected rotary disk tumbler faces the keyhole 5 when the duplicate key is not completely inserted. The rotary disc tumbler lock is still locked because the unlocking notch 4 is not aligned with the locking bar 11 at this time. When the duplicate key is further inserted, the spherical surface of the other end of the floating pin 14 is engaged with, for example, a chamfered portion formed on the upper edge of the shelf 23, and is pushed up by a wedge action generated by the engagement. As shown in FIG. 4 and FIG. 7, the opening edge of the key insertion hole of the selected rotary disc tumbler 200 is pushed to align the unlocking notch 4 with the inner edge of the locking bar 11, so that the rotary The disk tumbler lock is unlocked. At this time, as is apparent from FIG. 7, the opening edge of the key insertion hole 1 of the selected rotary disk tumbler 200 moves to the outside of the key hole 5. In other words, the entire opening edge of the key insertion hole of the selected rotary disc tumbler 200 is hidden by the shadow of the partition plate 15 on the near side. That is, in order to illegally unlock the rotary disk tumbler lock according to the present invention by picking,
A thin tool must be inserted from the outer end of the narrow keyhole, and the opening edge of the key insertion hole of the selected rotary disc tumbler 200 must be moved outside the keyhole of the partition plate in front of it (see FIG. 7). This is first of all impossible with currently available linear picking tools, and picking is undoubtedly very difficult, even if picking techniques are improved in the future. The present invention is not limited to the illustrated embodiment and can be implemented in various modifications. For example, in the illustrated embodiment, the key is mounted on the tip of the duplicate key. However, it is needless to say that the floating pin may be mounted in the middle of the blade along the length direction. The present invention is not limited to the rotary disk tumbler lock in which the longitudinal direction of the cross-sectional shape of the keyhole 5 is horizontal as in the illustrated embodiment, but a so-called vertically long keyhole. Can be applied to a rotary disk tumbler lock having a shape. In this case, one end of the floating pin may be formed into a spherical shape or the like, so that the floating pin can be easily driven in the length direction by engaging with the relief notch. As is apparent from the above description, according to the present invention, a floating key longer than its thickness is movably mounted on a duplicate key, while a slot for accommodating a selected rotary disk tumbler is provided. Of the pair of partitioning plates to be formed, the other end of the floating pin is engaged with the other end of the floating pin on the outside of the portion that interferes with the movement trajectory of the other end of the floating pin of the partitioning partition on the indoor side, and this is engaged with the opening edge of the keyhole. When the rotary disk tumbler lock is locked or unlocked, the floating pin is driven in the longitudinal direction by engaging with the shelf, and one end of the rotary disk tumbler is unlocked by one end. The lock notch is aligned with the inside edge of the locking bar, and the opening edge of the key insertion hole is hidden by the partition plate in front of it. Has the desired effect of making it more difficult.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view for explaining a configuration of a rotary disk tumbler lock. FIG. 2 is a plan view of a duplicate key. FIG. 3 is an enlarged cross-sectional view of a floating pin mounting portion of the duplicate key of the rotary disk tumbler lock according to one embodiment of the present invention. FIG. 4 is a longitudinal sectional view of a rotary disk tumbler lock according to an embodiment of the present invention. FIG. 5 is a front view of a partition plate. FIG. 6 is a cross-sectional view of a selected rotary disk tumbler mounting portion of the rotary disk tumbler lock according to one embodiment of the present invention, showing a state where a duplicate key is not inserted. FIG. 7 is a cross-sectional view of a selected rotary disk tumbler mounting portion of the rotary disk tumbler lock according to an embodiment of the present invention, showing a state where a partition plate in front is removed and a duplicate key is inserted. [Description of Signs] 1 Key insertion hole 2 Rotary disk tumbler 3 Support shaft 4 Unlock notch 5 Key hole 6 Duplicate key 7 Engagement protrusion 8 Backup pin 9 Depression 11 Locking bar 12 Blade 14 Floating pin 15 Partition plate 17 Tail plug 22 Slot 23 shelf 24 relief notch 25 relief recess

Claims (1)

Claims: 1. An outer cylinder having a cam groove formed along a generatrix on an inner peripheral surface, rotatably fitted to the outer cylinder, and laminated in the center axis direction via a gap. While providing a plurality of partition plates,
An inner cylinder having a keyhole penetrated along the central axis, extending along the generatrix of the inner cylinder, being guided radially movably at the outer periphery of the inner cylinder, and engaging with the cam groove; A locking bar urged in a direction in which the outer edge of the partition plate protrudes outward, and in each slot between the partition plates, a key insertion hole large enough to surround the key hole is formed in a central portion. A rotary disc tumbler is inserted and one of its substantial parts is pivotally supported on a pivot that penetrates the inner cylinder in the axial direction, and an unlocking notch is formed on the outer edge of the free end, On the other hand, at the opening edge of the key insertion hole, an engagement protrusion whose movement trajectory of the tip interferes with the flat portion or the edge portion of the duplicate key blade inserted into the key hole is integrally protruded, and each rotary disk tumbler is mounted. This engaging projection urges in the direction approaching the duplicate key, and normally Is locked to a backup pin penetrating in the axial direction, while each of the engaging projections of these tumblers is engaged with a corresponding recess formed in a duplicate key blade inserted through the keyhole. When the unlocking notch of the disk tumbler is aligned with the inner edge of the locking bar, at least one position of the duplicate key blade is inserted into the key insertion hole of the selected rotary disk tumbler when inserted into the key hole. A floating pin longer than the thickness of the blade, which is aligned with the opening edge in the center axis direction of the inner cylinder, is supported so as to be able to pass through the blade and move in the length direction, while the selected rotary disk tumbler is housed. The partition on the inner room side of the pair of partitions forming the slot being designated is designated as the selected partition, and this selection is made. A shelf portion that engages with the other end of the floating pin and guides it so as to align it with the opening edge of the keyhole, on the outdoor side of the portion of the separated partition plate that interferes with the movement locus of the other end of the floating pin. Forming
On the other hand, a relief notch is formed in the partition plate located outside of the selected partition plate so that the floating pin can escape, and the floating pin at the opening edge of the key insertion hole of the selected rotary disk tumbler is formed. The part that comes into contact with one end of the rotary disc tumbler is formed so that when the duplicate key is inserted and pressed by one end of the floating pin, the unlocking notch of the selected rotary disc tumbler is aligned with the inner edge of the locking bar. And rotary disk tumbler tablets.