JPH0324951B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a tumbler lock with a construction key device (hereinafter simply referred to as a cons tumbler lock), and in particular, a construction key device that can be unlocked with a duplicate key. Concerning cons tumbler locks.

[Conventional technology and problems]

A construction key device is a construction key that locks and unlocks each dwelling unit using a special key called a construction key (a construction key).After construction is completed, the construction key device can be unlocked.
A construction key is a device that makes it unusable and allows only the duplicate key (dwelling unit key) used by the owner or tenant to be used.It is a device that streamlines the construction worker's locking and unlocking work and key management work during construction. It was devised to further ensure the safety of the owner or tenant. Note that the duplicate key here does not refer to a so-called spare key, but rather a key having a regular key shape for unlocking one lock.

The conventional construction key device locks a plurality of tumblers selected from among the plurality of tumblers inside the tumbler lock with a locking member so that the edges align with the shear line, that is, these selected tumblers are locked during construction. During the construction work, the construction key, which is different from the duplicate key, will be used as a contract key to temporarily deactivate the tumbler and operate only the remaining tumblers that are in operation. After the construction is completed, the contractor will use a special tool to select the above. The tumbler was unlocked and returned to working condition.

However, along with special tools, the above-mentioned contractor must also bring a duplicate key to hand over to the owner, etc. in order to confirm that the construction key device has been released, and there is a possibility that the duplicate key may be lost or duplicated by a malicious person. I can't say that there aren't any.

[Purpose of the invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a cons/tumbler lock that allows the owner or tenant to directly unlock the construction key device by themselves using a duplicate key handed to them, thereby facilitating the unlocking work of the construction key device. The purpose is to streamline the process and further improve the safety of locks.

[Means for solving problems]

In order to achieve the above object, the present invention includes an outer cylinder in which a tumbler locking groove is formed along the generatrix on the inner circumferential surface, and a tumbler locking groove that is rotatably fitted to the outer cylinder, and is fixed at a predetermined distance in the direction of the center axis. It has a plurality of laminated partition members and an inner cylinder with a keyhole passing through it along the central axis, and each slot formed between the partition members of this inner cylinder has a keyhole. A tumbler is inserted into the center of each tumbler, which is guided so as to be swingable in the width direction of the key inserted therein, and which is biased in the direction of engagement with the tumbler locking groove. The edges of each tumbler are sheared by opening keyholes of different sizes at different positions, and engaging the opening edges of the keyholes with the key grooves of the duplicate keys inserted into the keyholes. The inner cylinder is provided with a cons bar extending in the keyhole axis direction and having an inner surface facing the side edge of the tumbler, and one end of the cons bar is aligned with the side edge of the tumbler. The cons bar is supported so as to be able to swing in a vertical plane, and has two positions: a tumbler locking position where the inner surface of the cons bar is approximately parallel to the keyhole axis, and a tumbler release position where the free end of the cons bar is separated from the keyhole. A locking mechanism is provided to keep the angular position quasi-stable, and engaging portions capable of engaging with the cons bar are formed on the edge of a plurality of selected tumbler sides facing the cons bar, and when the construction key device is activated. Place the cons bar in the tumbler locking position,
A construction work in which the selected tumblers are locked in a position where their edges align with the shear line, and the side edges of the parts that face the selected tumblers when inserted into the keyhole are cut out. A dedicated construction key can be used, and on the other hand, a sloped cam is formed on one side of the slot facing the cons bar, and the sloped cam is guided so as to be able to swing in the same direction as the tumbler, and the sloped cam is engaged with the tumbler locking groove. The key insertion hole is biased in the direction in which the key is inserted, and further has an opening edge that does not interfere with the keyhole at any swing position, and a cam hole that has an inclined edge that is spaced apart from the keyhole as it approaches the inclined cam. The first
A release tumbler and a connecting member that engages with the cam hole are integrally provided on one side, and a second release tumbler is overlapped and inserted, and the connecting member is closest to the keyhole on the inclined edge of the cam hole. In the locked state in which the slope cam is engaged with the tumbler locking groove of the outer cylinder, the regulating edge that is approximately aligned with the opening edge on the slope cam side in the key width direction of the keyhole is aligned with the opening edge on the slope cam side. When rotating the inner cylinder using a construction key that is formed into a two-release tumbler and has a notched side edge facing the release tumbler when inserted into the keyhole, the first and second release tumblers must be swung together. Using a duplicate key whose full width is ensured in the part facing these release tumblers, when the inner cylinder rotates for the first time, the side edge of the duplicate key is brought into contact with the regulating edge of the second release tumbler, and the key is rotated in the width direction of the key. The second release tumbler is moved in the direction away from the key hole by the wedge action of the inclined edge of the cam hole caused by the subsequent movement of the second release tumbler, and the second release tumbler is moved away from the key hole. Therefore, the construction key device is released by swinging the cons bar outward and rotating it to the tumbler release position, releasing the locking of the selected tumbler group by the cons bar and returning them to the operating state. It is characterized by

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 1 indicates an outer cylinder, and the inner peripheral surface of the outer cylinder 1 has tumbler locking grooves 2 at two locations symmetrical with respect to the central axis of the outer cylinder 1 along its generatrix direction. 2 is formed. The locking groove 2 shown in the second figure is formed as an elongated notch hole that penetrates the outer cylinder 1 and opens on the outer circumferential surface of the outer cylinder.

An inner cylinder 3 is rotatably fitted into the inner hole of the outer cylinder 1. As shown in FIG. 1, this inner cylinder 3 has a plurality of partition members 4, 4 stacked in the direction of the central axis at predetermined intervals, and also A keyhole 5 passes through it.

In each of the plurality of slots 6, 6 formed between the partition plates 4, 4, a key inserted into the keyhole 5 is guided so as to be swingable in the width direction (horizontal direction in FIG. 2). The outer side, that is, the tumbler locking groove 2
An elongated plate-shaped tumbler 7 is inserted and biased in the direction of engagement. In the center of each tumbler 7, there is a keyhole 5 as shown in FIG.
The key holes 8 are each opened at different positions in the key width direction, and when a duplicate key is inserted into the key hole 5, the opening edge of the key hole 8 in the key width direction and the duplicate key are inserted. The edge of each tumbler is aligned with the shear line by engaging with a key groove formed in the side edge of the tumbler.

Also, in FIGS. 1 and 2, reference numerals 9 and 9
are parallel to each other and to the central axis of the cylinder, and are parallel to the inner cylinder 3
These pins 9,9 are
As a spring holder for the tumbler spring 11 that urges the tumbler 7 and the release tumbler described later, and as a protruding position regulating member for the tumbler 7, etc.
Furthermore, it functions as a guide member for the tumbler.

Therefore, in the inner cylinder 3, there are
As shown in the figure, a cons bar 12 is built in, which extends in the keyhole axis direction and whose inner surface faces the side edges of the tumbler. Consbar 1 in the illustrated embodiment
Reference numeral 2 denotes an elongated thick plate-shaped rod, which is housed in a consbar groove 13 formed along the generatrix on the outer peripheral surface of the inner cylinder. Note that the bottom surface of this cons bar groove 13 has nine slots 6,
Of the 6 slots, it communicates with the 7 slots on the right side.

Further, one end (the left end in FIG. 1) of the cons bar 12 is supported by a support shaft 14 so as to be able to swing within a plane perpendicular to the side edges of the tumblers 7, 7.

Furthermore, on both sides of the free end of the cons bar 12, as shown in FIGS.
6 are arranged in succession substantially along the radial direction of the inner cylinder 3.

On the other hand, if the angular position of the cons bar 12 where the inner surface (inner edge) of the cons bar 12 is approximately parallel to the keyhole axis is referred to as the tumbler locking position as shown in FIG. As shown in FIG. 3, a click ball hole 17 that passes through the inner cylinder 3 in the swinging direction of the tumbler 7 is provided in the portion of the inner cylinder 3 that aligns with the first click hole 15.
is drilled. In the embodiment shown in the third figure, the click ball hole is divided into two sections sandwiching the cons bar 12 by the cons bar groove 13,
Each of them includes a click ball 18 and a click spring 19 in order from the one closest to the cons bar 12.
is stored. Further, the openings at both ends of the click ball hole 17 are closed by the end portions of a band-shaped spring holding plate 21 which are crimped. And this spring holding plate 2
1 and the click ball 18, each of the pair of click balls 18, 18 is brought into elastic contact with the corresponding first click hole 15.
5, 15 and click balls 18, 18, the cons bar 12 is semi-stably held in the cons bar locking position in FIGS. 1 and 3. These click holes 15, 16, click balls 18, click springs 19, etc. constitute a locking mechanism 20 for the cons bar 12. In addition, it goes without saying that such a locking mechanism is not limited to the one shown in the drawings, and various other mechanisms may be employed.

On the other hand, by cutting out the side edges of the selected tumblers 7, 7 (the five tumblers on the right in FIG. 1) facing the inner surface of the cons bar 12, the locking portion 7a
is formed. The formation position of the locking portion 7a is such that the cons bar 12 is engaged with the locking portion 7a, and the tumbler 7a is formed in spite of the elasticity of the tumbler spring 11.
The edge of the tumbler 7 shall be set so as to align with the shear line when the cons bar 12 is engaged with the cons bar 12.

On the other hand, as shown in FIGS. 1 and 3, at least one of the slots 6, 6 facing the console bar 12 (the fourth slot counting from the key entrance in FIG. 1) is provided with a construction key device. First and second release tumblers 22 and 23 for releasing are inserted in a superposed manner.

The first release tumbler 22 is an elongated plate-like body with a chevron-shaped slope cam 22a formed at one end.
It is guided so as to be able to swing in the same direction as the tumbler 7, and is biased by the elasticity of the tumbler spring 11 in the direction in which the inclined cam 22a engages in the tumbler locking groove 2.

Furthermore, as shown in FIGS. 3 and 4, the first release tumbler 22 has a key insertion hole 22b in its center that is large enough not to interfere with the keyhole 5 in any of its swinging positions. , Furthermore, the side edge portion facing the cons bar 12 is
Notched to prevent interference with

Furthermore, a pair of cam holes 22 are provided at both ends of the first release tumbler 22 along the swinging direction.
c, 22c are open. The cam hole 22c has an inclined edge 22d that becomes more distant from the keyhole 5 as it approaches the inclined cam 22a (see FIG. 4).

On the other hand, the second release tumbler 23 is a thin plate body slightly shorter than the tumbler 7, as shown in FIG. , 22c is cut and raised toward the first release tumbler 22, and this cut and raised portion overlaps with the connecting member 2.
3a is integrally provided on the joint surface with the first release tumbler and is engaged with the cam hole 22c.

Further, as shown in FIG. 3, the connecting member 23
a is the keyhole 5 of the inclined edge 22d of the cam hole (Fig. 4)
In the locked state where the inclined cam 22a of the first release tumbler is engaged with the tumbler locking groove 2 of the outer cylinder, the regulating edge formed on the second release tumbler 23 23
b is the inclined cam 22a in the key width direction of the keyhole 5;
It is almost aligned with the side opening edge (the right edge in FIG. 3).

Furthermore, an operating piece 23c is integrally provided on the side edge of the second release tumbler 23 facing the cons bar 12 in a protruding manner.

[Effect]

In the cons tumbler lock according to an embodiment of the present invention configured as described above, when the construction key device is activated, the cons bar 12 is locked by the locking mechanism 20 as shown in FIGS. 1 and 3. The cons bar 12 and the tumbler locking portion 7 are semi-stably held in a tumbler locking position where the inner surface is substantially parallel to the keyhole axis, and as shown in FIG.
By engaging with a, the selected tumbler 7, 7
each is locked in a position where the edge is aligned with the shear line.

As a result, the tumblers 7, 7 locked to the cons bar 12 become inoperative.

Therefore, as shown in FIG.
tumblers 7, 7, and the first,
When the construction key CK, which is made thinner by notching the side edge of the part facing the second release tumblers 22, 23, is inserted into the keyhole 5, the three tumblers 7, 7 (the first (see figure) aligns with the shear line, and the inner cylinder 3 becomes rotatable. That is, the construction key CK can be used to unlock the cons tumbler key when the construction key device is activated.

When the construction key CK was turned in this state, the inner cylinder 3 also rotated together, and in the locked state, it was engaged in the tumbler locking groove 2 of the outer cylinder (see Figure 3).
When the inclined cam 22a of the first release tumbler is removed from this, the first release tumbler 22 is pushed into the inner cylinder against the elasticity of the tumbler spring 11, as shown in FIG. Therefore, the first and second release tumblers 22, 2
Since the part of the construction key CK facing the first and second release tumblers 2 is tapered, there is nothing to prevent these release tumblers 22 and 23 from swinging within the inner cylinder 3.
2 and 23 swing together. Therefore, no force is applied to the cons bar 12 from the second release tumbler 23, and the construction key device is kept in an activated state.

On the other hand, when the duplicate key IK shown in FIG. The edges of all the tumblers of the cons tumbler lock align with the sheer line and become unlocked. The portion of the duplicate key IK of the cons tumbler lock according to the present invention facing the first and second release tumblers 22 and 23 (section A in FIG. 7) is not cut out and is designed to ensure the entire width of the blank key. As shown in FIG. 3, the first and second release tumblers 22, 23 do not interfere with the lock hole 5 in the locked state, so they do not interfere with the insertion of the duplicate key IK.

As shown in Fig. 8, when the duplicate key is inserted and the inner cylinder 3 is turned, the first release tumbler 2
2 is pushed inward in the inner cylinder, but unlike in the case of a construction key, in this case, a second
The regulating edge 23b of the release tumbler abuts,
Thereafter, the second release tumbler 23 cannot be moved in the key width direction. Nevertheless, the first release tumbler is pushed inward, so that the inclined edge 22d of the cam hole 22c of the first release tumbler
(Fig. 4) pushes the connecting member 23a protrudingly provided on the second release tumbler 23 outward in the key thickness direction by a wedge action, and as a result, the connecting member 23a protrudingly provided on the second release tumbler 23 is pushed outward in the key thickness direction. The actuating piece 23c overcomes the locking force of the locking mechanism 20 (FIG. 3),
Push the cons bar 12 so that its free end moves outward.

As shown in FIG. 1, the distance between the spindle 14 and the second release tumbler 23 is set to, for example, about 1/3 of the distance between the spindle 14 and the click hole 16, so the second release tumbler Even a slight movement of the cons bar 12 causes the free end of the cons bar 12 to be swung outward by a considerable amount.

This outward rotation of the cons bar 12 releases the selected group of tumblers from the cons bar 12, and all tumblers of the cons tumbler lock are activated. In this way the construction key device is released.

At the same time, as shown in FIG. 8, the click ball 18 of the locking mechanism 20 engages with the second click hole 16 (see FIG. 1) of the cons bar, and due to these engagements, the tumbler release position of the cons bar 12 is It remains metastable and the construction key device never returns to its working state.

It goes without saying that the construction key device described above is unlocked by the first unlocking operation using the duplicate key IK.

After release of the construction key device, the cons tumbler lock according to the invention functions like a conventional tumbler lock. Note that in this tumbler lock, the first release tumbler 22 also swings each time the lock is locked or unlocked, but when the present inventors made a prototype and tested its usability, almost no resistance from the first release tumbler 22 was felt.

Also, after releasing the construction key device,
Of course, the construction key CK used during construction cannot be used to unlock the door.

〔effect〕

As is clear from the above description, in the present invention, the construction key device is released by the first unlocking operation using the duplicate key, so knowledge regarding the structure of locks and special tools as described above are not required. , the release work of the construction key device can be significantly streamlined.

Furthermore, for the same reason, the number of people handling duplicate keys can be minimized, and the safety of the lock can be further improved.

Furthermore, since the shape of the construction key can be made completely different from that of the duplicate key, there are various effects such as there being no fear that the duplicate key will be copied from the construction key.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of the inner cylinder of a cons tumbler lock according to an embodiment of the present invention, showing the operating state of the construction key device;
The figures are cross-sectional views taken along the lines in Figure 1 and -, respectively, and also show the outer cylinder.
The figure is a plan view of the first release tumbler, figure 5 is a plane view of the construction key, and figure 6 is a plane view of the third release tumbler.
This is a cross-sectional view similar to the figure, showing the state in the middle of unlocking with the construction key, Figure 7 is a plan view of the duplicate key, and Figure 8 is a cross-sectional view similar to Figure 3, showing the state in the middle of unlocking with the construction key. Indicates the release state of the key device. 1... Outer cylinder, 2... Tumbler locking groove, 3...
Inner cylinder, 4... Partition member, 5... Keyhole, 6... Slot, 7... Tumbler, 7a... Locking part, 8...
... Key hole, 12 ... Cons bar, 20 ... Locking mechanism, 22 ... First release tumbler, 22a
...Slope cam, 22b...Key insertion hole, 22c...
Cam hole, 22d... Slanted edge, 23... Second release tumbler, 23a... Connecting member, 23b...
...Regulation edge, CK...Construction key,
IK... duplicate key.

Claims (1)

[Scope of Claims] 1. An outer cylinder in which a tumbler locking groove is formed along the generatrix line on the inner peripheral surface, and a plurality of tumbler locking grooves rotatably fitted to the outer cylinder and stacked at a predetermined interval in the central axis direction. It has a partition member and an inner cylinder having a keyhole passed through it along the central axis, and each slot formed between the partition members of the inner cylinder has a key inserted into the keyhole. is guided so that it can swing in the width direction of the
A tumbler biased in the direction of engagement in the tumbler locking groove is inserted, and key through holes of a size that can surround the keyhole are opened at different positions in the center of each tumbler. , in which the opening edge of the keyhole is engaged with the keyway of a duplicate key inserted into the keyhole, so that the edge of each tumbler is aligned with the shear line, and the inner cylinder has a keyhole. A cons bar extending in the axial direction and having an inner surface facing the side edge of the tumbler is provided, and one end of the cons bar is supported so that the cons bar can swing in a plane perpendicular to the side edge of the tumbler. A locking mechanism is provided to maintain semi-stable angular positions of the two cons bars: a tumbler locking position where the inner surface is approximately parallel to the keyhole axis, and a tumbler release position where the free end of the cons bar is separated from the keyhole; A locking portion capable of engaging with the cons bar is formed on the side edge of the plurality of selected tumblers facing the cons bar, and when the construction key device is activated, the cons bar is placed in the tumbler locking position, and the selected tumbler is A construction exclusively for construction work in which a group of tumblers is locked in a position where their edges align with the shear line, and the side edge of the part that faces the selected group of tumblers when inserted into the keyhole is cut out. On the other hand, a sloped cam is formed on one side of the slot facing the cons bar, and the sloped cam is guided so as to be swingable in the same direction as the tumbler, and the sloped cam is guided in the direction in which it engages in the tumbler locking groove. A first cam hole that is biased and has an opening edge that does not interfere with the keyhole in any swing position, and a cam hole that has an inclined edge that becomes more distant from the keyhole as it approaches the inclined cam.
A release tumbler and a second release tumbler having a connecting member integrally protruding from one side that engages with the cam hole are superimposed and inserted, and the connecting member is closest to the keyhole on the inclined edge of the cam hole. In the locked state in which the slope cam is engaged with the tumbler locking groove of the outer cylinder, the regulating edge that is approximately aligned with the opening edge on the slope cam side in the key width direction of the keyhole is aligned with the opening edge on the slope cam side. When rotating the inner cylinder using a construction key that is formed into a two-release tumbler and has a notched side edge facing the release tumbler when inserted into the keyhole, the first and second release tumblers must be swung together. When the inner cylinder is rotated for the first time using a duplicate key that has a full width in the part facing these release tumblers,
The side edge of the duplicate key is brought into contact with the regulating edge of the second release tumbler to restrict its movement in the key width direction, and the wedge action of the inclined edge of the cam hole caused by the subsequent movement of the first release tumbler The second release tumbler is moved in the direction away from the keyhole, and the second release tumbler swings the cons bar outward and rotates it to the tumbler release position, causing the cons bar to engage the selected tumbler group. A tumbler lock with a construction key device, characterized in that the construction key device is released by releasing the lock and returning them to an operating state.