JP4113714B2 - Rotary disc tumbler lock - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to an improvement of a novel rotary disc tumbler lock previously proposed by the present applicant, and more particularly to a rotary disc tumbler lock that makes it difficult to perform unauthorized unlocking, so-called picking.
[0002]
[Prior art]
The present applicant has previously proposed a novel rotary disk tumbler lock improved from the so-called lever tumbler lock (rotary disk cylinder lock) according to Japanese Patent Application No. 2001-316885.
[0003]
The rotary disk tumbler lock includes an outer cylinder having a cam groove formed along a generatrix of the inner peripheral surface, and a plurality of partition plates that are rotatably fitted to the outer cylinder and stacked in the central axis direction through a gap. An inner cylinder having a key hole extending along the central axis, and extending along a generatrix of the inner cylinder, and guided in a radially movable manner on the outer periphery of the inner cylinder, and the cam A locking bar biased in a direction in which an outer edge engaged with the groove protrudes outward, and a key insertion hole of a size capable of enclosing the key hole in a central portion in each slot between the partition plates Insert the formed annular rotary disk tumbler and pivotally support one part of its substantial part on a support shaft that penetrates the inner cylinder in the axial direction and unlocks the notch on the outer edge of the free end. On the other hand, the movement trajectory of the tip is at the opening edge of the key insertion hole. Engagement protrusions that interfere with the flat part or edge part of the keyed blade inserted into the hole are integrally projected, and each rotary disk tumbler is urged in the direction in which the engagement protrusions are close to the keyed key, and in a normal state. Then, when the inner cylinder is locked to the backup pin penetrating in the axial direction, on the other hand, when each of the engaging projections of these tumbler groups is engaged with the corresponding recess formed in the keyed blade inserted through the key hole. The unlocking notch of each rotary disk tumbler is aligned with the inner edge of the locking bar.
[0004]
To further summarize the structure of the rotary disk tumbler lock described above, as shown in FIG. 1, an annular rotary disk tumbler 2 having a key insertion hole 1 of a size capable of enclosing the key hole at the center is provided on the support shaft 3. The unlocking notch 4 is formed on the outer end edge of the free end portion while being pivotably supported, and on the other hand, a joint key 6 in which the movement locus of the tip is inserted into the key hole 5 at the opening edge of the key insertion hole 1. Engaging projections 7 that interfere with the flat portion or the edge of the blade of the blade are integrally projected, and each rotary disk tumbler 2 is urged in the direction in which the engaging projections 7 approach the joint key 6 and is normally backed up. When each of the engaging protrusions of the tumbler group is engaged with the corresponding recess 9 formed in the blade of the key 6 inserted through the key hole 5, each of the rotary disk tumblers is locked. Unlock notch 4 It is intended to match with the inner edge of the king bar 11.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to provide a rotary disc tumbler lock in which a floating pin mechanism is incorporated in the rotary disc tumbler lock, thereby making unauthorized unlocking called so-called picking more difficult.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is characterized in that an outer cylinder in which a cam groove is formed along a generatrix of an inner peripheral surface, and is rotatably fitted to the outer cylinder and is centered through a gap. A plurality of partition plates stacked in the axial direction are provided, and an inner cylinder that penetrates the key hole along the central axis, and extends along the generatrix of the inner cylinder, and radially in the outer peripheral portion of the inner cylinder A locking bar which is guided so as to be movable, and whose outer edge engaged with the cam groove is biased in a direction protruding outward, and a key hole is formed in each slot between the partition plates in the center portion. An annular rotary disc tumbler having a key insertion hole of a size that can be surrounded is inserted, and one of its substantial parts is pivotally supported on a support shaft that penetrates the inner cylinder in the axial direction, An unlocking notch is formed on the outer edge of the free end, while the tip is on the opening edge of the key insertion hole. Engagement protrusions that interfere with the flat part or edge part of the key-locking blade inserted in the key hole are integrally projected, and each rotary disk tumbler is biased in the direction in which the engagement protrusion approaches the key. In addition, normally, the inner cylinder is locked to the backup pin penetrating in the axial direction, and on the other hand, each of the engagement protrusions of these tumbler groups has a corresponding recess formed in the keyed blade inserted into the key hole. When engaged, the rotary notch of each rotary disc tumbler is aligned with the inner edge of the locking bar, and at one end of the key lock blade, one end is selected when inserted into the key hole. Insert a floating pin that is aligned with the opening edge of the key insertion hole of the disk tumbler in the axial direction of the inner cylinder and that passes through the blade. On the other hand, the partition plate on the inner chamber side of the pair of partition plates forming the slot in which the selected rotary disc tumbler is accommodated is designated as the selected partition plate. A shelf that engages with the other end of the floating pin and guides it to align with the opening edge of the keyhole on the outside of the part of the selected partition plate that interferes with the movement locus of the other end of the floating pin. On the other hand, a relief notch through which the floating pin can penetrate is formed in the partition plate located outside the selected partition plate, and the opening edge of the key insertion hole of the selected rotary disc tumbler When the key is inserted and pushed by one end of the floating pin, the part that makes contact with the one end of the floating pin It is characterized in that the unlocking notch of the rubber is shaped so as to align with the inner edge of the locking bar.
[0007]
【Example】
Embodiments of the present invention will be described below with reference to FIGS.
In FIG. 2, reference numeral 6 denotes a key of the rotary disk tumbler lock according to the embodiment of the present invention. This key is a combination of the blade 12 and the knob 13 integrally formed in the same manner as the key of the conventional rotary disk tumbler lock. is there.
[0008]
A floating pin 14 is loosely moved in the thickness direction of the blade (in the direction of the paper in FIG. 2) at a portion where a recess 9 (see FIG. 1) is to be formed in at least one portion of the blade 12 (the tip of the blade in the illustrated embodiment). It is supported as possible.
[0009]
In this case, the innermost rotary disc tumbler 2 in the inner cylinder, in other words, the innermost rotary disc tumbler is selected to correspond to this floating pin, and this is hereinafter referred to as a selected rotary disc tumbler 200. I will decide.
[0010]
Needless to say, when the key is inserted into the key hole, the floating pin 14 is aligned with the opening edge of the key insertion hole 1 of the selected rotary disc tumbler 200.
[0011]
As shown in FIG. 3, for example, one end (the upper end of the left floating pin 14) is formed in a truncated cone shape, and the floating pin 14 is integrally joined with a large-diameter thick flange portion on the other end side. A part of the spherical surface is integrally formed.
[0012]
2 and 3, the reason why the pair of floating pins 14, 14 are arranged symmetrically with respect to the center axis of the inner cylinder is that the rotary disk tumbler lock is a reversible key, that is, the blade 12 is turned over. This is because even if it is inserted into the keyhole 5, it can be locked and unlocked.
[0013]
In order to attach these floating pins 14 and 14 to the blade 12, for example, an unnumbered stepped pin hole that loosely fits the floating pin 14 is formed so as to penetrate the blade 12, and the pin hole is formed in the pin hole. After inserting the floating pin 14, the large-diameter opening edge of the pin hole is caulked so as to project inward.
[0014]
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 lock key blade 12.
[0015]
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 illustrated.
[0016]
The rotary disk tumbler lock in the illustrated embodiment is, for example, as shown in FIG. 3, in which the blade of the key 6 is inserted into the keyhole 6 in a horizontal state, and the floating pin 14 is always attached downward by the acceleration of gravity. It is a form in which the position is controlled in such a manner.
[0017]
On the other hand, the structure of the rotary disc 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 the description attached to the aforementioned Japanese Patent Application No. 2001-31685 and Briefly described because it is described in detail in the drawings, as shown in FIG. 4, a plurality of partition plates 15 and 15 (see FIG. 1 and FIG. 5), a key guide 16 and a tail plug 17 are connected to retainers 18 and 18. (See FIG. 1), the inner cylinder 19 is configured by being coupled to each other with a predetermined gap, and the inner cylinder 19 is rotatably fitted to the outer cylinder 21.
[0018]
In each slot 22 formed between the partition plates 15 and 15, the rotary disc tumbler 2 is accommodated in the manner described above.
[0019]
As described above, since the selected rotary disc tumbler 200 is the innermost one, it is the partition plate 15 and the tail plug 17 that form the slot 22 in which it is accommodated.
[0020]
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 are referred to as partition plates.
[0021]
In the illustrated embodiment, a pair of partition plates (in the illustrated embodiment, the tail plug 17) that form a slot in which the selected innermost rotary disc tumbler 200 is accommodated are selected. Designated as a partition plate.
[0022]
And, as shown in FIGS. 4 and 7, the tail plug 17 as the selected partition plate is located outside the portion that interferes with the movement locus of the other end (lower end) of the floating pin 14. A shelf portion 23 is formed so as to project outward.
[0023]
4 and 7, the shelf 23 is formed so as to contact the lower end edge of the opening forming the key hole of the partition plate 15 (tail plug 17), and the other end of the floating pin 14 when the key is inserted. For example, the wedge action generated by the engagement between the chamfered portion 26 formed on the shelf and the spherical surface at the lower end of the floating pin 14 guides this to align with the opening edge of the keyhole. is there.
[0024]
On the other hand, since the length of the floating pin 14 is longer than the thickness dimension of the lock key blade 12 as described above (see FIG. 3), if the cross-sectional shape of the key hole is the same as that of the conventional rotary disk tumbler lock, the floating pin 14 The key cannot be inserted into the keyhole due to interference with the opening edge of the keyhole.
[0025]
Therefore, as shown in FIG. 5, the floating pin 14 penetrates into 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. A relief notch 24 is formed.
[0026]
However, since the floating pin 14 may move in the length direction when it passes through the inside and outside of the partition plate facing the selected rotary disk tumbler 200, the partition plate 15 A relief recess 25 (see FIGS. 4 and 5) may be formed on the back side (inside the room).
[0027]
Further, the portion of the key insertion hole 1 of the selected rotary disk tumbler 200 that comes into contact with one end of the floating pin is unlocked by the unlocking bar 11 when the key is inserted and pushed by one end of the floating pin. Shaped to align with the inner edge.
[0028]
The rotary disc tumbler lock according to one embodiment of the present invention configured as described above is configured so that the rotary disc tumblers 2 and 2 other than the rotary disc tumbler 200 selected at the time of inserting the key are engaged with the recess 9 of the key. The lock notch 4 is aligned with the inner edge of the locking bar 11.
[0029]
Since the selected rotary disc tumbler 200 is at the back in the illustrated embodiment, as shown in FIG. 6, an angle at which a part of the rotary disc tumbler 200 faces the keyhole 5 when the key is not completely inserted. Since the unlocking notch 4 is not aligned with the locking bar 11 at this time, the rotary disc tumbler lock is still in the locked state.
[0030]
When the key is further inserted, the other end spherical surface portion of the floating pin 14 is engaged with, for example, a chamfered portion formed on the upper end ridge portion of the shelf portion 23 and is pushed up by a wedge action generated by these engagements. 7 and 7, the opening edge of the key insertion hole of the selected rotary disk tumbler 200 is pushed to align the unlocking notch 4 with the inner edge of the locking bar 11, so that the rotary disk tumbler lock Is unlocked.
[0031]
At this time, as apparent from FIG. 7, the opening edge of the key insertion hole 1 of the selected rotary disc tumbler 200 moves to the outside of the key hole 5.
[0032]
In other words, the opening edges of the key insertion holes of the selected rotary disc tumbler 200 are all hidden behind the partition plate 15 in front.
[0033]
That is, in order to illegally unlock the rotary disk tumbler lock according to the present invention by picking, a thin tool is inserted from the outer end of the narrow key hole, and the opening edge of the key insertion hole of the selected rotary disk tumbler 200 is placed in front of it. It must be moved outside the keyhole of the partition plate (see FIG. 7).
[0034]
This is not possible with the linear picking tools currently available, and there is no doubt that picking will be very difficult even if the picking technology improves in the future.
[0035]
It should be noted that the present invention is not limited to the illustrated embodiment and can be implemented with various modifications.
[0036]
For example, in the embodiment shown in the figure, it is attached to the tip of the key, but it goes without saying that the place where the floating pin is attached may be in the middle along the length direction of the blade.
[0037]
Further, the present invention is not only applicable to a rotary disc 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 rotary having a so-called vertically long keyhole. The present invention can also be applied to a disk tumbler lock. In this case, one end of the floating pin may be formed into a spherical shape so that it can be easily driven in the length direction by engagement with the relief notch.
[0038]
【The invention's effect】
As is apparent from the above description, the present invention is such that a floating pin longer than its thickness is movably mounted on a key, while a slot for housing a selected rotary disk tumbler is formed. A shelf that engages with the other end of the floating pin and guides it to align with the opening edge of the keyhole on the outside of the part that interferes with the movement locus of the other end of the floating pin of the indoor partition plate When the rotary disk tumbler lock is unlocked, the floating pin is driven in the length direction by engaging with the shelf, and the unlocking notch of the selected rotary disk tumbler is moved to the inner edge of the locking bar by one end of the floating pin. And the opening edge of the key insertion hole is concealed by the partition plate in front of the key insertion hole. An effect.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view for explaining a configuration of a rotary disc tumbler lock.
FIG. 2 is a plan view of a key combination.
FIG. 3 is an enlarged cross-sectional view of a floating pin mounting portion of a rotary disk tumbler lock key according to an embodiment of the present invention.
FIG. 4 is a longitudinal sectional view of a rotary disc tumbler lock according to one 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 disc tumbler mounting portion of a rotary disc tumbler lock according to an embodiment of the present invention, showing a state in which a key is not inserted.
FIG. 7 is a cross-sectional view of a selected rotary disc tumbler mounting portion of a rotary disc tumbler lock according to an embodiment of the present invention, showing a state in which a front partition plate is removed and a key is inserted.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Key insertion hole 2 Rotary disc tumbler 3 Spindle 4 Unlocking notch 5 Key hole 6 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 part 24 Relief Notch 25 relief recess

Claims (1)

An outer cylinder formed with a cam groove along the generatrix of the inner peripheral surface, and a plurality of partition plates that are rotatably fitted to the outer cylinder and stacked in the central axis direction through a gap are provided. And an outer edge that extends along the generatrix of the inner cylinder and is guided so as to be movable in the radial direction at the outer peripheral portion of the inner cylinder and engages with the cam groove An annular rotary disk tumbler having a locking bar biased in the outward projecting direction and having a slot for inserting a key hole in the center of each slot between the partition plates. Is inserted, and one portion of the substantial part is pivotally supported on a support shaft penetrating the inner cylinder in the axial direction, and an unlocking notch is formed on the outer edge of the free end, The flat part of the blade of the key that the movement trajectory of the tip is inserted into the key hole at the opening edge of the insertion hole Is a backup pin that integrally protrudes an engaging projection that interferes with the edge, and urges each rotary disk tumbler in a direction in which the engaging projection approaches the key, and normally penetrates the inner cylinder in the axial direction. On the other hand, when each of the engaging protrusions of these tumbler groups engages with a corresponding recess formed in the keying blade inserted through the key hole, the unlocking notch of each rotary disk tumbler is locked. Aligning with the inner edge of the bar, the opening edge of the key insertion hole of the rotary disk tumbler and the inner cylinder central axis when at least one of the blades of the key is selected when inserted into the key hole A floating pin that is aligned in the direction and is longer than the thickness of the blade is supported so that it can move longitudinally through the blade, while the above selected The partition plate on the inner chamber side of the pair of partition plates forming the slot in which the rotary disc tumbler is accommodated is designated as the selected partition plate, and the movement locus of the other end of the floating pin of the selected partition plate A shelf that engages with the other end of the floating pin and guides it to align with the opening edge of the keyhole is formed outside the part that interferes with An escape notch that allows the floating pin to pass through is formed in a certain partition plate, and the key is inserted into the opening edge of the key insertion hole of the selected rotary disk tumbler that comes into contact with one end of the floating pin. The unlocked notch of the selected rotary disc tumbler will align with the inner edge of the locking bar when pushed by one end of the floating pin Rotary disc tumbler tablets, characterized by being molded

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