JP4113717B2 - Construction key device for rotary disc tumbler lock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a construction key device (hereinafter simply referred to as a “cons device”) in a rotary disk tumbler lock, and more particularly to a cons device that can be released with a key combination.
[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]
As shown in FIG. 1, this rotary disk tumbler lock is provided with an axial rotary disk tumbler 2 having a key insertion hole 1 having a size capable of enclosing the key hole at the center, and is pivotally supported on a support shaft 3. At the same time, an unlocking notch 4 is formed on the outer edge of the free end portion, and on the other hand, a flat portion of a blade of the 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 Engagement protrusions 7 that interfere with the end edge portion are integrally provided, and each rotary disk tumbler 2 is urged in a direction in which the engagement protrusions 7 approach the key 6 and is normally locked to the backup pin 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 key 6 inserted through the key hole 5, the unlocking notch 4 of each rotary disk tumbler is locked. Inner edge of bar 11 It is intended to match.
[0004]
On the other hand, the construction key device is a special key called a construction key (construction key) that is used to lock and unlock each dwelling unit during construction, and if the construction key device is released after the construction is complete, the construction key cannot be used. After that, it is a device that allows only the dwelling unit key (joint key) used by the owner or resident to be used, and to streamline the lock and unlock work and key management work of the contractor during the construction. It was devised to ensure further safety.
[0005]
Here, the combined key is not a so-called spare key (reserve key) but a key having a regular key shape for unlocking one lock.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to provide a novel cons apparatus that can be released by rotating the backup pin of the rotary disk tumbler lock and can be applied to the rotary disk tumbler lock according to the Japanese Patent Application No. 2001-316885. .
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, the cross-sectional shape of the backup pin of the rotary disk tumbler lock is made circular, and the backup pin extends in parallel to the side of the key hole. On the other hand, an arc-shaped relief groove is formed at the opening edge of the key insertion hole of each rotary disk tumbler so as not to interfere with the backup pin when swinging around the support shaft, One rotary disc tumbler is designated as a resting tumbler, and the portion of the backup pin that intersects with the resting tumbler is partially cut in a plane parallel to the central axis to make a substantially D-shaped cross section, A locking step is formed in the relief groove of the pause tumbler, and when the construction key device is activated, the flat part of the backup pin is Place it at an angular position almost perpendicular to the groove, and the resting tumbler is locked to the backup pin through the locking step, so that the unlocking notch is aligned with the inner edge of the locking bar, Therefore, it is possible to use a construction-dedicated construction key that is shortened by cutting out the blade ahead of the part facing the pause tumbler, and at least one of the other rotary disc tumblers except the pause tumbler is replaced with a reset tumbler. Then, an operating piece extending in the radial direction protrudes from the back-up pin portion facing the reset tumbler, and on the other hand, a driving protrusion is formed on the reset tumbler to interfere with the operating piece when rotating, and the reset tumbler is supported. A shaft that is pivotably supported on the shaft and has a blade flat surface facing the engagement protrusion of the reset tumbler. When the reset tumbler is moved in the radial direction and the inner cylinder is rotated during the operation, the backup pin is rotated by the engagement of the drive projection and the operating piece, and the plane facing the resting tumbler It is characterized in that the portion is made parallel to the escape groove, so that the pause tumbler and the backup pin are disengaged to make it impossible to use the construction key.
[0008]
【Example】
Embodiments 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, and the outer cylinder 12 is formed with a cam groove 14 having a V-shaped cross section that engages with the 11.
[0009]
The locking bar 11 is urged downward in FIG. 2 so as to be elastically pressed against the cam groove 14 by a locking bar spring (not shown).
[0010]
On the other hand, the inner cylinder 13 integrally couples a plurality of partition plates 15 and 15 to each other by a pair of retainers 16 and 16 (see FIGS. 2 and 4) like a conventionally known lever tumbler lock. A key guide 17 is attached to the end, and a tail plug 18 (see FIG. 3) is attached to the inner end.
[0011]
The rotary disk tumbler 2 (see FIG. 1) is accommodated in a slot (gap) 19 formed between one partition plate 15 and another adjacent partition plate 15 so that it can be swung by the support shaft 3. As described above, the shaft is supported and the engaging projection 7 is biased in the direction of approaching the blade of the key 6 by the elasticity of the tumbler spring 21 (see FIG. 1).
[0012]
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 parallel to the side of the key hole. It arrange | positions so that it may extend.
[0013]
Correspondingly, as shown in FIG. 4, the opening end edge of the key insertion hole 1 of each rotary disk tumbler 2 has an arc shape so as not to interfere with the backup pin 8 when swinging around the support shaft 3. A relief groove 22 is formed.
[0014]
The tumbler shown in FIG. 4 is a pause tumbler described later, but the same applies to a standard tumbler that is not a pause tumbler.
[0015]
On the other hand, at least one rotary disc tumbler is designated as the pause tumbler 23.
[0016]
In the illustrated embodiment, as shown in FIG. 3, the back (right) seven tumblers are designated as the pause tumblers 23.
[0017]
As shown in FIG. 4, the portion of the backup pin 8 that intersects with the resting tumbler 23 is partially scraped with a plane parallel to the central axis to have a substantially D-shaped cross section.
[0018]
Correspondingly, as shown in FIGS. 9 and 10, a locking step 24 is formed in the relief groove 22 of the resting tumbler.
[0019]
When the construction key device is activated, the backup pin 8 is placed at the angular position shown in FIG. 4, that is, the plane portion of the backup pin 8 is substantially perpendicular to the escape groove 22 and is counterclockwise in FIG. The energized pause tumbler 23 is configured to be locked to the backup pin 8 via the locking step 24.
[0020]
That is, as a result of the D-shaped backup pin 8 taking the angular position shown in FIG. 4, the backup pin 8 looks the thickest when viewed from the escape groove 22, so that the width of the escape groove is narrowed at the opening end. The locking step 24 is locked to the backup pin 8.
[0021]
The rotational angle position of the backup pin 8 shown in FIG. 4 is metastable due to the frictional force between the backup pin that is elastically pressed by the tail plug 18 by the elastic force of the backup pin spring 25 (see FIG. 3) and its support hole. Retained.
[0022]
As described above and as shown in FIG. 4, in the state where the pause tumbler 23 is locked to the backup pin 8 via the locking step 24, the unlocking notch 4 is connected to the inner edge of the locking bar 11. The position of the locking step 24 in the escape groove 22 is set so as to be aligned, and the angular position around the support shaft 3 of the resting tumbler 23 at this time is set as the unlocking angular position of the resting tumbler.
[0023]
As apparent from FIG. 4, the pause tumbler 23 is always locked at the unlocking angle position even if the key is not inserted into the keyhole 5, so the blade ahead of the part facing the pause tumbler 23 is cut away. It is possible to use a construction key 26 (refer to FIG. 3) dedicated to the shortened construction.
[0024]
In other words, the rotary key tumbler lock can be controlled by the construction key 26.
[0025]
On the other hand, in order to release the cons device according to the present invention, at least one of the rotary disc tumblers other than the pause tumbler is replaced with a reset tumbler.
[0026]
In other words, it is designated not as a tumbler for obtaining a key difference but as a reset tumbler used only for releasing the cons device.
[0027]
As shown in FIG. 3, the reset tumbler 27 is accommodated in a slot outside the seven pause tumblers 23, 23 where the tip of the construction key 26 does not reach.
[0028]
As shown in FIG. 5, the reset tumbler 27 is a substantially C-shaped lever-like member. Like the other rotary disc tumblers 2, the reset tumbler 27 has an engagement protrusion 7 on the edge facing the keyhole 5. And is pivotally supported by the support shaft 3 through a vertically long hole 28 opened at the upper end thereof and so as to be freely movable in the vertical direction in FIG.
[0029]
Furthermore, as with the other rotary disc tumblers 2, the engaging projections 7 are biased in the direction approaching the key holes 5 by the elasticity of a tumbler spring 21 (not shown) (see FIG. 1).
[0030]
On the other hand, as shown in FIGS. 3 and 5, an operating piece 29 extending in the radial direction (downward in FIG. 5) is integrally projected from the portion of the backup pin 8 facing the reset tumbler 27.
[0031]
Corresponding to the operation piece 29, as shown in FIG. 5, a drive protrusion 31 is formed on the reset tumbler 27.
[0032]
In the illustrated embodiment, the drive 31 is formed in such a manner that the opening edge of the escape groove 22 (see FIG. 4) having a large width for accommodating the operating piece 29 and the backup pin 8 protrudes inward. ing.
[0033]
The rotary disc tumbler lock provided with the cons device configured as described above is a pause tumbler in which the seven rotary disc tumblers 2 and 2 at the back are locked at the unlocked angular position. The rotary disk tumbler lock can be locked and unlocked during construction work by the construction key 26 that does not touch the tumblers 23 and 23 and is a key to the three rotary disk tumblers 2 and 2 on the entrance side. What can be done is as described above.
[0034]
After the construction is completed, it is assumed that a dwelling unit key (joint key) 6 is given to the contractor or the resident, and the resident inserts this joint key into the keyhole of the rotary disc tumbler lock, for example.
[0035]
As shown in FIG. 3, the key 6 is a long one that reaches the inner cylinder 13, and is not necessary. Therefore, a recess 9 (see FIG. 1) is formed in the portion facing the engaging protrusion 7 of the reset tumbler 27. There is no blade flat part.
[0036]
When this key is inserted for the first time, the rotary disk tumblers 2 and 2 engaged in the key hole 6 are pushed away from the inclined end edge formed at the tip of the key, and the key is invaded. The same applies to the reset tumbler 27 shown in FIG.
[0037]
Then, when the part of the key-locked blade that secures the flat surface comes into contact with the engagement protrusion 7 of the reset tumbler, the reset tumbler is centered on the support shaft 3 against the elasticity of the tumbler spring as shown in FIG. Then, the drive protrusion 31 rotates the backup pin 8 clockwise via the operation piece 29 of the backup pin 8.
[0038]
Then, when the joint key 6 is completely inserted, the rest tumbler is started from the beginning, and the other rotary disk tumblers 2 and 2 align the unlocking notch 4 with the inner edge of the locking bar 11 by the corresponding recess 9 of the joint key 6, As a result, since the rotary disc tumbler lock is unlocked, the inner cylinder 13 can be rotated.
[0039]
When the inner cylinder 13 is slightly rotated from this state, as shown in FIG. 7, the locking bar 11 escapes from the cam groove 14 of the outer cylinder 12 and rides on the inner peripheral surface of the outer cylinder. As a result, the locking bar 11 11, the reset tumbler 27 and the drive protrusion 31 integral with the reset tumbler 27 are slightly raised.
[0040]
Then, the driving protrusion 31 further rotates the backup pin 8 in the clockwise direction via the operating piece 29.
[0041]
Corresponding to the rotation of the reset tumbler 27, as shown in FIGS. 8 and 9, the backup pin 8 that has locked the pause tumbler 23 at the unlocking angle position also rotates integrally. When it is slightly rotated, as shown in FIG. 9, the flat portion of the backup pin 8 becomes substantially parallel to the escape groove 22, and the engagement between the pause tumbler 23 and the backup pin 8 is released in this way. The key device is released.
[0042]
Then, when the key is removed from the keyhole after the locking / unlocking operation, as shown in FIG. 10, the pause tumbler 23 is rotated, for example, counterclockwise by the elasticity of the tumbler spring, and the inner end of the escape groove 22 is the backup pin 8. As a result, the unlocking notch 4 moves out of the position where it is aligned with the locking bar 11, and the resting tumbler is restored as a rotary disc tumbler.
[0043]
After that, the short construction key 26 (see FIG. 3) cut out from the resting tumbler that was revived as the rotary disc tumbler 2 cannot be used, and only the joint key 6 can lock and unlock the rotary disc tumbler lock. Become.
[0044]
FIG. 11 shows a pause tumbler of a cons device according to another embodiment of the present invention. In this embodiment, two backup pins are used as first and second backup pins 8 and 80, and both sides of the keyhole 5 are shown. Are arranged symmetrically.
[0045]
The reason for using two backup pins in this manner is to balance the load applied to the backup pins in the embodiment shown in FIG.
[0046]
That is, as described above, when the backup pin is provided only on one side of the keyhole 5, for example, when the tumbler 23 is urged counterclockwise in FIG. 4, it can be locked to the backup pin 8. When it is urged clockwise, the pause tumbler 23 cannot be locked to the backup pin 8.
[0047]
Normally, in the rotary disk tumbler lock, the tumblers are alternately reversed in urging direction. In this case, two backup pins are required, and other pause tumblers adjacent to the pause tumbler 23 shown in FIG. Has a locking step 24 (see FIGS. 9 and 10) in the right escape groove 22.
[0048]
To release the cons device when there are first and second backup pins 8 and 80 as shown in FIG. 11, the reset tumbler 27 corresponds to the second backup pin 80 as shown in FIGS. A reset tumbler 27 having another drive protrusion 31 is used.
[0049]
[0050]
15 to 17 show still another embodiment of the present invention, which is a reset tumbler for driving only the second backup pin 80 separately from the reset tumbler for driving the first backup pin 8 shown in FIG. 27, and the first and second backup pins 8, 80 are separately driven at intervals with time so that the cons device can be released in two stages.
[0051]
In this way, the cons device can be switched to, for example, the first cons device used during construction and the second cons device for management used by the landlord or the like until the house is sold after the construction is completed. Yet another advantage is improved.
[0052]
The reset tumbler 27 shown in FIG. 15 is obtained by removing the drive protrusion 31 that drives the first backup pin 8 from the reset tumbler shown in FIG. 12. The manner of releasing the cons device by the reset tumbler 27 is shown in FIG. Thru | or FIG. 17, and since it is the same as that mentioned above, further detailed description is abbreviate | omitted.
[0053]
Needless to say, the reset tumbler shown in FIG. 15 is replaced with, for example, the fourth pause tumbler from the outside of the seven pause tumblers shown in FIG. 3, and the second controller that releases the first cons device. The length of the ski (not shown) is such that it does not reach the reset tumbler replaced with the fourth pause tumbler from the outside.
[0054]
Further, the reset tumbler shown in FIG. 15 is for driving the second backup pin 80 from the left side to the right side in the drawing, and this is a reset for driving the first backup pin 8 on the left side shown in FIG. The same function can be given by turning the tumbler upside down and placing it on the right side.
[0055]
However, at this time, it is necessary to form the second backup pin 8 and the operating piece 29 integral therewith symmetrically with the one shown in FIG.
[0056]
【The invention's effect】
As is clear from the above description, the present invention designates at least one rotary disk tumbler as a pause tumbler, and a portion of the backup pin that intersects the pause tumbler is partially in a plane parallel to its central axis. Corresponding to this, a locking step is formed in the relief groove of the resting tumbler, and the resting tumbler is disengaged through the engagement of the stopping step and the backup pin when the cons device is activated. It is possible to use a construction-specific construction key that is locked at the lock angle position and therefore shortened by cutting out the blade ahead of the part facing the resting tumbler, and when the cons device is released, the engagement of the key and the reset tumbler Since the backup pin is rotated to release the pause tumbler, the rotary disc tumbler lock is equipped with a cons It has achieved the intended purpose of incorporating, that.
[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 an embodiment of the present invention.
FIG. 3 is a longitudinal sectional view thereof.
FIG. 4 is a front view of a pause tumbler.
FIG. 5 is a front view of a reset tumbler.
FIG. 6 is a front view of a reset tumbler, showing a state where a key is inserted into a keyhole.
7 is a front view of a reset tumbler similar to FIG. 6, showing a state in which the inner cylinder is slightly rotated. FIG.
FIG. 8 is a front view of a pause tumbler similar to FIG. 4 and shows a state in which the key is inserted into the keyhole.
9 is a front view of a pause tumbler similar to FIG. 8, showing a state where the inner cylinder is slightly rotated. FIG.
FIG. 10 is a front view of a pause tumbler similar to that in FIG.
FIG. 11 is a front view of a resting 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.
13 is a front view of a reset tumbler similar to that in FIG. 12, showing a state in which the key is inserted into the keyhole.
14 is a front view of a reset tumbler similar to FIG. 13 and shows a state where the inner cylinder is slightly rotated. FIG.
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 and shows a state in which the key is inserted into the keyhole.
FIG. 17 is a front view of a reset tumbler similar to FIG. 16, showing a state where the inner cylinder has been slightly rotated.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Key insertion hole 2 Rotary disk tumbler 3 Spindle 4 Unlocking notch 5 Key hole 6 Key 7 Engagement protrusion 8 Backup pin 9 Depression 11 Locking bar 12 Outer cylinder 13 Inner cylinder 22 Escape groove 23 Pause tumbler 24 Locking step part 26 Construction key 27 Reset tumbler 28 Long hole 29 Actuating piece 31 Drive protrusion

Claims (1)

The backup pin of the rotary disk tumbler lock has a circular cross-sectional shape, and this backup pin is arranged so as to extend in parallel to the side of the key hole, while the key insertion hole of each rotary disk tumbler An arc-shaped relief groove is formed at the opening edge of the shaft so as not to interfere with the backup pin when swinging around the support shaft. On the other hand, at least one rotary disk tumbler is designated as a pause tumbler, and the pause tumbler The part of the backup pin that intersects with the central axis is partly cut to make a substantially D-shaped cross section, and correspondingly, a locking step is formed in the relief groove of the resting tumbler. When the device is in operation, place the backup pin at an angular position where the flat part is almost perpendicular to the relief groove, and the pause tumbler It is locked to the back-up pin through the locking step, and the unlocking notch takes an unlocking angle position that aligns with the inner edge of the locking bar, so the blade ahead of the part facing the resting tumbler is notched This makes it possible to use a construction key that has been shortened for construction, and replaces at least one of the other rotary disc tumblers except the rest tumbler with a reset tumbler. On the other hand, the reset tumbler is formed with a drive projection that interferes with the above-mentioned operation piece when rotating, and the reset tumbler is pivotally supported on the support shaft to engage the reset tumbler. Rotation of the reset tumbler and rotation of the inner cylinder during the operation of the key with the blade flat part facing the protrusion As the reset tumbler moves in the radial direction, the backup pin is rotated by the engagement of the drive projection and the operating piece so that the flat portion of the portion facing the pause tumbler is parallel to the escape groove, and thus the pause tumbler A construction key device for a rotary disc tumbler lock, wherein the construction key is disengaged by disengaging the backup pin.

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