JP2003262053A - Construction key device of rotary disc tumbler lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To build a construction key device into a rotary disc tumbler lock. <P>SOLUTION: At least one rotary disc tumbler is assigned as a halt tumbler 23; a part of a backup pin 8, which crosses the halt tumbler 23, is partially chipped on a plane parallel to its central axis, so as to be formed so as to have an approximately D-shaped cross section; in accordance with this, a locking step part 24 is formed in a clearance groove 22 of the halt tumbler 23; at the operation of the construction key device, the halt tumbler 23 is locked to an unlocking angle position via the engagement of the step part 24 with the backup pin 8, so as to allow the use of a construction key exclusive to construction work, in which a blade ahead of a part facing the halt tumbler 23 is shortened by being notched; and at the release of the construction key device, the engagement of a duplicate key with a reset tumbler makes the backup pin 8 rotated so as to release the halt tumbler 23. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction key device (hereinafter simply referred to as a "cons device") for a rotary disk tumbler lock, and more particularly to a cons device which can be released by a duplicate key. About. [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
As shown in FIG. 1, an annular rotary disk tumbler 2 having a key insertion hole 1 large enough to surround the key hole in the center is pivotally supported on a support shaft 3 and is provided outside a free end. An unlocking notch 4 is formed at the edge, and a moving trajectory of the tip is inserted into the keyhole 5 at the opening edge of the key insertion hole 1.
An engagement protrusion 7 that interferes with the flat portion or the edge of the blade is integrally provided to urge each rotary disk tumbler 2 in a direction in which the engagement protrusion 7 approaches the duplicate key 6, and is normally backed up. When each of the engaging protrusions of the tumbler group engages with the corresponding recess 9 formed in the blade of the duplicate key 6 inserted through the keyhole 5, the engagement of The unlocking notch 4 is aligned with the inner edge of the locking bar 11. On the other hand, the construction key device is
During construction, lock and unlock each dwelling unit with a special key called the construction key (construction key), and after the construction is completed, if the construction key device is released, the construction key will be unusable, and the owner or resident will thereafter A device that allows the use of only the unit key (duplicate key) to be used, to rationalize the work of lockers and unlockers and key management work by the installer during construction, and to further secure the safety of the owner or resident. It was invented. [0005] Here, the duplicate key is not a so-called spare key (spare key) but a key having a regular key shape for unlocking one lock. The present invention can be released by rotating a backup pin of the rotary disk tumbler lock.
It is an object of the present invention to provide a novel cons device which can be applied to the rotary disc tumbler lock according to No. 6885. [0007] In order to achieve the above object, according to the first aspect of the present invention, a backup pin of a rotary disk tumbler lock has a circular cross-sectional shape, and the backup pin is It is arranged so as to extend parallel to the side of the keyhole, while the opening edge of the key insertion hole of each rotary disk tumbler is not interfered with the backup pin when swinging around the support shaft. An arc-shaped relief groove is formed, while at least one rotary disk tumbler is designated as a rest tumbler, and a portion of the backup pin that intersects the rest tumbler is partially shaved in a plane parallel to its central axis. It has a substantially D-shaped cross section. Correspondingly, a locking step is formed in the escape groove of the rest tumbler, At the time of setting operation, the backup pin is placed at an angle position where its plane portion is substantially perpendicular to the escape groove, the resting tumbler is locked to the backup pin via the locking step, and the unlocking notch is in contact with the inner edge of the locking bar. It is possible to use a construction key that has a matching unlocking angle position, cuts the blade ahead of the part that faces the idle tumbler, and shortens it, and also uses a rotary disk other than the idle tumbler. At least one of the tumblers is replaced with a reset tumbler, and a working piece extending in a radial direction is protruded from a portion of the backup pin facing the reset tumbler, while the reset tumbler interferes with the working piece when the tumbler is rotated. Along with forming the drive projection, the reset tumbler is pivotably supported on the support shaft,
When operating the duplicate key that secures the blade flat portion facing the engagement projection of the reset tumbler, the drive projection engages with the operation piece due to the radial movement of the reset tumbler accompanying the rotation of the reset tumbler and the rotation of the inner cylinder. By rotating the backup pin, the flat part facing the rest tumbler is parallel to the escape groove, so that the rest tumbler and the backup pin are disengaged and the construction key can not be used. It is characterized by having done. An embodiment of the present invention will be described below with reference to FIGS. 2 and 3, reference numeral 12 denotes an outer cylinder, and reference numeral 13 denotes an inner cylinder.
A cam groove 14 having a V-shaped cross section to engage with the cam groove 1 is formed. The locking bar 11 is urged downward in FIG. 2 so as to be resiliently pressed by the cam groove 14 by a locking bar spring (not shown). On the other hand, the inner cylinder 13 integrally connects a plurality of partition plates 15, 15 to each other by a pair of retainers 16, 16 (see FIGS. 2 and 4) like a well-known lever tumbler lock. Then, the key guide 17 is attached to the outer end, and the tail plug 18 (see FIG. 3) is attached to the inner end. The rotary disk tumbler 2 (see FIG. 1) is housed in a slot (gap) 19 formed between one partition plate 15 and another partition plate 15 adjacent to the partition plate 15, and is swung by the support shaft 3. As described above, the engagement protrusion 7 is urged in a direction approaching the blade of the duplicate key 6 by the elasticity of the tumbler spring 21 (see FIG. 1). In the rotary disk tumbler lock provided with the cons device according to the present invention, as shown in FIG. 2, the cross-sectional shape of the backup pin 8 is circular, and the backup pin 8 is It is arranged so as to extend in parallel with. Correspondingly, as shown in FIG. 4, the opening edge of the key insertion hole 1 of each rotary disk tumbler 2 is provided so as not to interfere with the backup pin 8 when swinging around the support shaft 3. An arc-shaped relief groove 22 is formed. The tumbler shown in FIG. 4 is a rest tumbler which will be described later, but the same applies to a standard tumbler which is not a rest tumbler. On the other hand, at least one rotary disk tumbler is designated as the rest tumbler 23. In the illustrated embodiment, as shown in FIG. 3, the back (right) seven tumblers are designated as the rest tumblers 23. As shown in FIG. 4, the portion of the backup pin 8 that intersects with the rest tumbler 23 is partially cut with a plane parallel to its central axis to have a substantially D-shaped cross section. Correspondingly, as shown in FIGS. 9 and 10, a locking step 24 is formed in the escape groove 22 of the rest tumbler. When the construction key device is operated, the backup pin 8 is placed at an angular position shown in FIG. 4, that is, an angular position whose plane portion is substantially perpendicular to the relief groove 22, and is countered by a tumbler spring (not shown) in FIG. The rest tumbler 23 urged clockwise is locked to the backup pin 8 via the locking step 24. That is, as a result of the backup pin 8 having a D-shaped cross section taking the angular position shown in FIG. 4, the backup pin 8 looks thickest when viewed from the clearance groove 22, so that the width of the clearance groove is narrowed at its open end. The locking step 24
Are locked to the backup pin 8. The rotation angle position of the backup pin 8 shown in FIG. 4 is determined by the backup pin spring 25 (see FIG. 3).
Is held quasi-stable by the frictional force between the backup pin elastically pressed by the tail plug 18 and the supporting hole. As described above, as shown in FIG. 4, when the rest tumbler 23 is locked to the backup pin 8 through the locking step 24, the unlocking notch 4 is The position of the locking step 24 in the escape groove 22 is set so as to align with the inner edge, and the angular position of the rest tumbler 23 around the support shaft 3 at this time is defined as the unlock angle position of the rest tumbler. As is apparent from FIG. 4, the rest tumbler 23 is always locked at the unlocking angle position even if the duplicate key is not inserted into the keyhole 5, so that the blade ahead of the portion facing the rest tumbler 23 is moved. It is possible to use a construction key 26 (see FIG. 3) dedicated to the work, which is cut out and shortened. In other words, the construction key 26
Thus, the locking and unlocking of the rotary disk tumbler lock can be controlled. On the other hand, in order to release the conssing device according to the present invention, at least one of the rotary disc tumblers other than the rest tumbler is replaced with a reset tumbler. In other words, it is designated not as a tumbler for obtaining a key difference, but as a reset tumbler used only for releasing a cons device. As shown in FIG. 3, the reset tumbler 27 is provided outside the seven rest tumblers 23, 23.
The construction key 26 is stored in a slot that cannot be reached. As shown in FIG. 5, the reset tumbler 27 is a lever-shaped member having a substantially C-shaped overall shape.
Like the other rotary disc tumbler 2, an engagement protrusion 7 is provided at an edge facing the keyhole 5, and
Through a vertically long hole 28 opened at the upper end thereof, it is pivotally supported by the support shaft 3 and movably in the vertical direction in FIG. Further, a tumbler spring 21 (not shown)
That the engaging projection 7 is urged in the direction approaching the keyhole 5 by the resilience of the rotary disc tumbler 2 (see FIG. 1). On the other hand, as shown in FIGS. 3 and 5, an operation piece 29 extending in the radial direction (downward in FIG. 5) is integrally protruded from a portion of the backup pin 8 facing the reset tumbler 27. . As shown in FIG. 5, a drive projection 31 is formed on the reset tumbler 27 corresponding to the operation piece 29. In the illustrated embodiment, the clearance groove 22 having a large width for accommodating the operating piece 29 and the backup pin 8 is provided.
(See FIG. 4) with the opening edge part protruding inward,
The drive 31 is formed. In the rotary disk tumbler lock provided with the cons device configured as described above, the seven rotary disk tumblers 2 and 2 at the back are locked at the unlocking angle position to form a rest tumbler. The three rotary disk tumblers 2, 2 on the entrance side are not touched by the rest tumblers 23, 23, and the construction of the rotary disk tumbler lock during the construction work is performed by the construction key 26 which is a duplicate key. What can be done is as described above. After the construction is completed, a house key (duplicate key) 6 is given to the builder or the resident, and for example, the resident inserts the duplicate key into the keyhole of the rotary disk tumbler lock. The duplicate key 6 is, as shown in FIG.
Since it is long enough to reach the inside of the cylinder 3 and is not necessary, there is no depression 9 (see FIG. 1) in a portion facing the engagement projection 7 of the reset tumbler 27, and a blade flat portion is secured. When the duplicate key is first inserted, the duplicate key enters while the inclined edge formed at the tip of the duplicate key pushes the rotary disc tumblers 2 and 2 engaged in the keyhole 6. This aspect is the same in the reset tumbler 27 shown in FIG. When the portion of the double key blade whose flat surface is secured comes into contact with the engagement projection 7 of the reset tumbler, as shown in FIG. 6, the reset tumbler is pivoted against the elasticity of the tumbler spring. 3, the drive projection 31 rotates the backup pin 8 clockwise via the operation piece 29 of the backup pin 8. When the duplicate key 6 is completely inserted, the rest rotary tumbler 2 and the other rotary disk tumblers 2 and 2 place the unlocking notch 4 on the inner edge of the locking bar 11 by the corresponding recess 9 of the duplicate key 6. The inner cylinder 13 is rotatable since the rotary disc tumbler lock is unlocked as a result of the alignment. When the inner cylinder 13 is slightly rotated from this state, as shown in FIG.
Escapes from the cam groove 14 and rides on the inner peripheral surface of the outer cylinder. As a result, the reset tumbler 27 and the drive projection 31 integral with the reset tumbler 27 are slightly pushed by the inner edge of the locking bar 11. Then, the drive projection 31 rotates the backup pin 8 further clockwise via the operation piece 29. In response to the rotation of the reset tumbler 27, as shown in FIGS.
When the inner cylinder is slightly rotated, the flat portion of the backup pin 8 is engaged with the escape groove 22 as shown in FIG. It becomes substantially parallel, and thus the rest tumbler 23 and the backup pin 8 are disengaged, and thus the construction key device is released. When the duplicate key is removed from the keyhole after the locking / unlocking operation, as shown in FIG. 10, the resting tumbler 23 is rotated counterclockwise, for example, by the elastic force of the tumbler spring, and the inner end of the escape groove 22 is moved. As soon as it comes into contact with the backup pin 8, the unlocking notch 4 is displaced from the position aligned with the locking bar 11, and the resting tumbler is restored as a rotary disc tumbler. Thereafter, the short construction key 26 (see FIG. 3), in which the portion facing the resting tumbler that has been revived as the rotary disk tumbler 2 is cut off, cannot be used. become able to. FIG. 11 shows a rest tumbler of a cons device according to another embodiment of the present invention. In this embodiment, two backup pins are used, and these are used as first and second backup pins 8 and 80 to provide a keyhole. 5 are arranged symmetrically on both sides. The reason why the number of backup pins is two is to disperse the load applied to the backup pins and balance them in the embodiment shown in FIG. That is, when the backup pin is provided only on one side of the keyhole 5 as described above, for example, when the tumbler 23 is urged counterclockwise in FIG. However, when urged clockwise, the rest tumbler 23 cannot be locked to the backup pin 8. Normally, in the rotary disk tumbler lock, the tumblers are alternately biased in the opposite directions. In this case, two backup pins are required, and the other tumblers are adjacent to the rest tumbler 23 shown in FIG. Has a locking step 24 (see FIGS. 9 and 10) in the right escape groove 22. When the cons device is released when the first and second backup pins 8 and 80 are present as shown in FIG. 11, the second backup pin 80 is attached to the reset tumbler 27 as shown in FIGS. A reset tumbler 27 provided with another driving projection 31 corresponding to the above is used. FIGS. 15 to 17 show still another embodiment of the present invention. This embodiment is different from the reset tumbler for driving the first backup pin 8 shown in FIG. A reset tumbler 27 for driving only the first and second backup pins 8 and 80 is prepared.
Are driven separately at intervals over time to release the cons device in two stages. In this manner, the cons device can be switched to, for example, a first cons device used during construction and a second cons device for management used by a landlord or the like until the house is sold after the construction is completed. There is another advantage that the function of is improved. The reset tumbler 2 shown in FIG.
7 is the reset tumbler shown in FIG. 12 from which the driving projection 31 for driving the first backup pin 8 is deleted. The manner in which the reset device is released by the reset tumbler 27 is clear from FIGS. Further, since it is the same as described above, further detailed description is omitted. Needless to say, the reset tumbler shown in FIG. 15 is replaced with, for example, the fourth rest tumbler from the outside of the seven rest tumblers shown in FIG. 3, and the first cons device is released. The length of the second consky (not shown) is such that it does not reach the reset tumbler replaced with the fourth rest tumbler from the outside. Further, the reset tumbler shown in FIG. 15 is for driving the second backup pin 80 from the left to the right in the figure, and this drives the first backup pin 8 on the left shown in FIG. The same function can be provided by turning over the reset tumbler and arranging it on the right side. However, at this time, it is necessary to form the second backup pin 8 and the operating piece 29 integral therewith symmetrically to those shown in FIG. As is apparent from the above description, according to the present invention, at least one rotary disk tumbler is designated as a rest tumbler, and the portion of the backup pin that intersects the rest tumbler is defined by its central axis. A part of the plane is parallel to the plane and is partially cut to have a substantially D-shaped cross section. Correspondingly, a locking step is formed in the relief groove of the rest tumbler, and the engagement between the locking step and the backup pin when the cons device is activated. The resting tumbler is locked at the unlocking angle position through the joint, and the blade ahead of the part facing the resting tumbler can be cut out to shorten the construction key. And the reset tumbler, the backup pin is rotated to release the rest tumbler. It has achieved its intended purpose of incorporating a cons device into a scrambler lock.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a rotary disc tumbler lock previously proposed by the present applicant. FIG. 2 is a front view of a rotary disc tumbler lock incorporating a cons device according to one embodiment of the present invention. FIG. 3 is a longitudinal sectional view thereof. FIG. 4 is a front view of a rest tumbler. FIG. 5 is a front view of a reset tumbler. FIG. 6 is a front view of the reset tumbler, showing a state where a duplicate key is inserted into a keyhole. FIG. 7 is a front view of a reset tumbler similar to FIG. 6,
This shows a state where the inner cylinder is slightly rotated. FIG. 8 is a front view of the rest tumbler similar to FIG. 4, showing a state in which a duplicate key is inserted into a keyhole. FIG. 9 is a front view of the rest tumbler similar to FIG. 8, showing a state in which the inner cylinder is slightly rotated. FIG. 10 is a front view of the rest tumbler similar to FIG. 8, showing a state in which the duplicate key is removed from the keyhole after the locking and unlocking operation. FIG. 11 is a front view of a rest tumbler similar to FIG. 4 showing another embodiment of the present invention. FIG. 12 is a front view of a reset tumbler according to another embodiment of the present invention. FIG. 13 is a front view of the reset tumbler similar to FIG. 12, showing a state where a duplicate key is inserted into a keyhole. FIG. 14 is a front view of a reset tumbler similar to FIG. 13, showing a state where the inner cylinder is slightly rotated. FIG. 15 is a front view of a reset tumbler according to still another embodiment of the present invention. FIG. 16 is a front view of a reset tumbler similar to FIG. 15, showing a state where a duplicate key is inserted into a keyhole. FIG. 17 is a front view of the reset tumbler similar to FIG. 16, showing a state where the inner cylinder is slightly rotated. [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 projection 8 Backup pin 9 Depression 11 Locking bar 12 Outer cylinder 13 Inner cylinder 22 Escape groove 23 Rest tumbler 24 Locking step 26 Construction key 27 Reset tumbler 28 Slot 29 Actuating piece 31 Driving projection

Claims (1)

Claims 1. A rotary disk tumbler lock has a backup pin with a circular cross section, and the backup pin is arranged to extend parallel to a side of a keyhole. On the other hand, at the opening edge of the key insertion hole of each rotary disk tumbler, an arc-shaped escape groove is formed so as not to interfere with the backup pin when swinging around the support shaft, and on the other hand, at least one rotary disk tumbler As a rest tumbler, and a portion of the backup pin that intersects the rest tumbler is partially shaved by a plane parallel to its central axis to have a substantially D-shaped cross section. Forming a locking step on the construction key device,
The backup pin is placed at an angle position where its plane portion is substantially perpendicular to the escape groove, the rest tumbler is locked to the backup pin via the locking step, and the unlocking notch is aligned with the inner edge of the locking bar. Take the angular position,
This makes it possible to use a construction key dedicated to construction work in which the blade ahead of the part that faces the resting tumbler is cut out and shortened, and replaces at least one of the other rotary disc tumblers except this resting tumbler with a reset tumbler. An operating piece extending in the radial direction is projected from a portion of the backup pin facing the reset tumbler, while a driving projection that interferes with the operating piece when the reset tumbler is rotated is formed and the reset tumbler is supported. At the time of operation of a duplicate key that is rotatably supported on the shaft and secures a blade flat portion facing the engagement protrusion of the reset tumbler, by the movement of the reset tumbler in the radial direction due to the rotation of the reset tumbler and the rotation of the inner cylinder, The backup pin is rotated by the engagement between the drive projection and the operation piece, and A rotary disk tumbler characterized in that the flat portion facing the disk is parallel to the escape groove, thereby disengaging the rest tumbler from the backup pin and making it impossible to use the construction key. Construction key device for tablets.