JPH0324949B2 - - 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, to a tumbler lock with 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 becomes unusable and allows only the duplicate key (dwelling unit key) used by the owner or tenant to be used, and is intended to streamline 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 refers to a key having a regular key shape for unlocking a single 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, the construction key, which is different from the duplicate key, is used to temporarily deactivate the tumbler and operate only the remaining tumblers that are in operation. After the construction is completed, the contractor uses 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 into the outer cylinder and is fixed at a constant interval in the direction of the central axis. It has a plurality of stacked partition plates, and an inner cylinder with a keyhole passed through it along the central axis, and each slot formed between the partition plates of this inner cylinder has a slot inserted into the keyhole. A tumbler that is swingably guided in the width direction of the key and biased in a direction to engage the tumbler locking groove is inserted, and a central portion of each tumbler is capable of surrounding the keyhole. Keyholes of different sizes are opened at different positions, and the opening edges of the keyholes are engaged with the grooves of the duplicate keys inserted into the keyholes to align the edges of each tumbler with the shear line. In the inner cylinder, a cons bar extending in the keyhole axis direction near the side edge of the tumbler and guided so as to be movable in the longitudinal direction; and a locking pin that is movably guided in the thickness direction of the key and engages with the cons bar at a position aligned with one of the slots in the axial direction of the keyhole,
When the cons bar is locked to the locking pin, an engaging protrusion is provided on a portion of the cons bar facing the side edge of each of the selected tumblers, and on the other hand, the selected tumbler facing the engaging protrusion A locking part that engages with the engagement projection is formed on the side edge of the cons bar, and when the construction key is activated, the locking pin locks the cons bar in a position where the engagement projection engages with the locking part of the tumbler. Then, the selected tumbler group is locked in a position where its edge aligns with the shear line, and the side edge that faces the engagement protrusion of the cons bar when inserted into the keyhole is cut out. On the other hand, a sloped cam is formed at one end of the slot facing the inner end of the locking pin, and the sloped cam is guided so as to be able to swing in the same direction as the tumbler, and the sloped cam locks the tumbler. A key insertion hole that is biased in the direction of engagement with the groove 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 farther from the keyhole as it approaches the inclined cam. A first release tumbler with an open opening and a second release tumbler with a connecting member integrally protruding from one side that engages with the cam hole are overlapped and inserted, and the connecting member is inserted into the slanted edge of the cam hole. In the locked state where the slope cam is engaged with the part closest to the keyhole and the slope cam is engaged in the tumbler locking groove of the outer cylinder, it is almost aligned with the opening edge on the slope cam side in the key width direction of the keyhole. A regulating edge is formed on the second release tumbler, and when the inner cylinder is rotated using the construction key, the first and second release tumblers are swung together, and the portion facing these release tumblers is When rotating the inner cylinder for the first time using a duplicate key that has secured the full width,
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, the second release tumbler releases the locking of the cons bar by the locking pin, the selected tumbler group is returned to the operating state, and the construction is completed. It is characterized in that the key device is released.

〔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 tumbler locking grooves 2, 2 are formed on the inner peripheral surface of the outer cylinder 1 at two locations symmetrical with respect to its central axis along the generatrix direction. has been done.

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 plates 4, 4 stacked in the direction of the central axis at a predetermined interval. A keyhole 5 passes through it.

The partition plate 4 in the illustrated embodiment is, as shown in FIG. A downward convex guide notch 4a is formed. Furthermore, a flat rectangular locking notch 4b is formed at the lower edge of the partition plate 4.

The partition plates 4, 4 each have a pair of crab-eye pieces 4c, 4c formed on both sides of the guide notch 4a, respectively, in the rectangular partition notches 6a or partition holes of the first partition stopper plate 6 shown in FIG. 6b, the mutual spacing is defined, and as shown in FIGS. 1 and 2, the cylinder caps 9 are clamped by the first and second cylinder frames 7 and 8, and the cylinder caps 9 are crimped. are integrally connected to each other by. In addition,
An elongated rectangular second partition stopper plate 11 integrally connected to the second cylinder frame 8 is engaged with the locking notch 4b (FIG. 3) of the partition plate 4.

In each of the plurality of slots 12, 12 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). An elongated plate-shaped tumbler 13 is inserted, which is biased outward, that is, in the direction in which the tumbler locking groove 2 is engaged. In the center of each tumbler 13, key holes 14 of a size that surrounds the key hole 5 are opened at different positions, and when a duplicate key is inserted into the key hole 5, the key hole 14 The opening edge (the right edge in FIG. 2) of the tumbler is engaged with a key groove formed on the side edge of the duplicate key, so that the edge of each tumbler is aligned with the shear line.

Further, in FIG. 2, reference numerals 15 and 15 indicate pins that are parallel to each other and to the central axis of the inner cylinder 3 and extend vertically through the inner cylinder 3. It also functions as a spring presser for the tumbler spring 16 that urges the tumbler, a member for regulating the protruding position of the tumbler 13, and a guide member for the tumbler.

Therefore, in the inner cylinder 3, there are
As shown in the figure, a cons bar 17 is built in close to one side edge of the tumblers 13, 13 and extending in the keyhole axis direction.

This cons bar 17, as shown in FIG.
For example, it is a rod with a rectangular cross section, and a spring receiving portion 17a is formed at one end (the left end in FIG. 5), and a U-shaped pin hooking notch 17b is formed at the other end. The other end of the cons bar 17 where the pin hooking notch 17b is formed is thinner than the other part, and a locking step 17c is formed there.

Furthermore, the tumbler 13 of the cons bar 17
On the surface facing the
The engaging protrusions 17d, 17d are arranged in rows at equal intervals from the tumblers 13, 13 in the inner cylinder 3.

The cons bar 17 configured as described above is housed in a space defined by the edge of the guide notch 4a (see FIG. 3) of the partition plate 4, and is movably guided in the length direction. has been done.

Further, as shown in FIG. 1, a cons bar spring 18 as a compression coil spring is provided between the spring receiving portion 17a of the cons bar and the cylinder cap 9.
The elasticity of the cons bar spring 18 biases the cons bar 17 inward (to the right in Figure 1) in its length direction, but when the construction key device is activated, the first As shown in the drawings and FIG. 6, the locking pin 19 described below engages with the locking step 17c (FIG. 5) of the cons bar, and locks the cons bar 17 in the position shown in the first figure. .

The locking pin 19 is slidably fitted into a hole opened in the first cylinder frame 7 in the thickness direction of the key at a position aligned with one of the slots 12 of the inner cylinder in the keyhole axis direction. When the construction key device is activated, it is pushed into the inner cylinder 3 by the elasticity of the locking pin spring 21 provided on the outer surface of the first cylinder frame 7, and the outer end has a large diameter. portion engages with the locking stepped portion 17c of the cons bar to define the position of the cons bar 17 in the keyhole axial direction, and the annular inner end surface of the large diameter portion is locked to the cons bar 17, so that the position shown in FIG. The vertical position is defined.

The locking pin spring 21 is, for example, a so-called split pin-like spring with a loop formed at one end, as shown in FIG. engage,
The other end is engaged with a slotted groove formed on the outer end surface of the locking pin 19, and the middle part is pressed from the outside with a spring presser piece 7b cut and raised from the first cylinder frame 7. It is stably attached to the tube 3.

The engaging protrusions 17d, 17d arranged in rows on the surface of the cons bar 17 facing the tumbler group are arranged as shown in FIG. As shown in FIG. 1, the protruding position is set so that it can face the side edge of each of the selected plurality (five in FIG. 1) of tumblers 13, 13. Further, the dimension of each engaging protrusion 17d in the keyhole axis direction is set to be approximately the same as the thickness of the tumbler 13, for example, as shown in FIG.

On the other hand, as shown in FIG. 2, a locking portion 13a is formed on the side edge of the selected tumbler facing the engagement protrusion 17d by, for example, notching the side edge. The formation position of the locking portion 13a is determined when the locking portion 13a is engaged with the engagement projection 17d and the tumbler 13 is locked to the cons bar 17 via the engagement projection 17d despite the elasticity of the tumbler spring 16. , the edge of the tumbler 17 shall be set to align with the shear line.

On the other hand, as shown in FIGS. 1 and 6, the slot 12 facing the inner end of the locking pin 19 (the 8th slot counting from the key entrance in FIG. 1st to do
and second release tumblers 22 and 23 are inserted in a superimposed manner.

The first release tumbler 22 is an elongated plate-like body with a chevron-shaped slope cam 22a formed at one end.
As shown in FIG. 6, the first partition plate 6 of the inner cylinder 3, the pins 15, 15, and the front and rear partition plates 4,
The inclined cam 22a is guided so as to be able to swing in the same direction as the tumbler 13, and the elasticity of the tumbler spring 16 causes the inclined cam 22a to move into the tumbler locking groove 2.
(Fig. 2).

In addition, as shown in FIGS. 6 and 8, the first release tumbler 22 has a key insertion hole 22b in its center that is large enough to not interfere with the keyhole 5 in any of its swinging positions. , Furthermore, the side edge portion opposite to the inner end of the locking pin 19 is connected to the locking pin 1
It is notched so as not to interfere with 9.

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. 8).

On the other hand, as shown in FIG. 6, the second release tumbler 23 is a thin plate body that is slightly shorter than the tumbler 13, and the portion that overlaps with the cam holes 22c and 22c is cut and raised toward the first release tumbler 22. This cut-out portion is the connecting member 23
A is integrally provided on the joint surface with the first release tumbler, and is engaged with the cam hole 22c.

Further, the connecting member 23a is connected to the inclined edge 2 of the cam hole.
2d (Fig. 8), engages with the part closest to the keyhole 5,
In the locked state in which the slope cam 22a of the first release tumbler is engaged with the tumbler locking groove 2 of the outer cylinder, the regulating edge 23b formed on the second release tumbler 23 matches the key width of the keyhole 5. It almost aligns with the opening edge on the slope cam 22a side in the direction (the right edge in FIG. 6).

Furthermore, an operating piece 23c is integrally provided on the side edge of the second release tumbler 23 facing the locking pin 19.

[Effect]

In the cons/tumbler lock according to the embodiment of the present invention configured as described above, when the construction key device is activated, the cons bar 17 is locked with the large diameter portion of the locking pin 19, as shown in FIG. By engaging with the stepped portion 17c, the engagement protrusion 17
Tumbler 13 with d and 17d selected respectively
As shown in FIG. 2, the engagement protrusion 17d and the engagement portion 13 of the tumbler
By engagement with a, the selected tumbler 13,
13 is locked in a position where the end edge is aligned with the shear line.

As a result, as shown in FIG. 7, the five tumblers aligned with the engagement protrusions 17d of the cons bar in the keyhole axial direction become inoperative.

Therefore, as shown in FIG.
When the construction key CK, which is thinned by cutting out the side edge of the part facing the release tumblers 22, 23, is inserted into the keyhole 5, the four tumblers 13, 13 (7th (see figure) aligns with the shear line, and the inner cylinder 3 becomes rotatable. In other words, when the construction key device is activated, the construction key CK
can be used to unlock cons tumbler locks.

When the construction key CK is turned in this state, the inner cylinder 3 also rotates together, and when the slope cam 22a of the first release tumbler, which was engaged in the tumbler locking groove of the outer cylinder in the locked state, comes off, The first release tumbler 22 is pushed inside the inner cylinder (not shown). Since the part of the construction key CK facing the first and second release tumblers 22, 23 is thin (see Fig. 9), the swinging of these release tumblers 22, 23 in the inner cylinder 3 is prevented. This does not prevent the first and second release tumblers 22, 23 from swinging together. Therefore, the locking pin 19 that locks the cons bar 17
No force is applied from the second release tumbler 23, and the construction key device remains activated.

On the other hand, as shown in Fig. 10, a key groove corresponding to the selected tumbler locked on the cons bar is formed on the side edge, and when the duplicate key IK is inserted into the key hole (not shown), However, the edges of all the tumblers of this cons tumbler lock are aligned with the shear line and are in the unlocked state. Cons according to the present invention
The part of the master key IK of the tumbler lock facing the first and second release tumblers 22, 23 (Fig. 10A)
part) is designed to ensure its full width without any notches, but as shown in Fig. 6, the first and second release tumblers 22, 23 interfere with the keyhole 5 in the locked state. Therefore, there is no obstacle to inserting the duplicate key IK.

When you insert the duplicate key and turn the inner cylinder 3, the same way as when you insert the construction key CK mentioned above,
The first release tumbler 22 is pushed inward in the inner cylinder, but unlike in the case of a construction key, in this case, the second release tumbler 22 is attached to the side edge of the duplicate key IK that has secured the full width as described above. The regulating edge 23b of the key contacts the second release tumbler 23, and the second release tumbler 23 can no longer move in the key width direction. Nevertheless, the first release tumbler is pushed inward, so that the inclined edge 22d (FIG. 8) of the cam hole 22c of the first release tumbler is connected to the connecting member protruding from the second release tumbler 23. 23
a (see Fig. 6) outward in the key thickness direction by a wedge action, and the actuating piece 23 integrated therewith
However, the locking pin 19 is pushed outward against the elasticity of the locking pin spring 21 (not shown).

Then, the engagement between the large diameter portion of the locking pin 19 and the locking stepped portion 17c (see FIG. 5) of the cons bar is released, and the cons bar is moved by the elasticity of the cons bar spring 18 (see FIG. 1). 17 moves rapidly to the right in FIG. During this movement, the pin hooking notch 17d (see FIG. 5) of the cons bar is connected to the locking pin 1.
It ends when it engages with the inner end small diameter part of 9,
By appropriately setting the dimensions of each part, the amount of movement of the cons bar 17 is made equal to the distance between one tumbler 13 and the adjacent partition plate 4, and after the cons bar moves, its engaging protrusion 17d is aligned with the partition plate 4. This can prevent interference with the swinging of the tumbler 13.

By the above-mentioned movement of the cons bar 17 in the length direction, the selected tumbler group is released from the cons bar 17, and all the tumblers of the cons tumbler lock are put into operation. In this way the construction key device is released.

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

Further, after the cons bar 17 moves, the annular inner end surface of the large diameter portion of the locking pin 19 rides on the other end (inner end) of the cons bar, and the released state of the construction key device is maintained stably. .

After release of the construction key device, the cons tumbler lock according to the invention functions as a normal tumbler lock. In addition, this tumbler lock is
The release tumbler also oscillates with each locking and unlocking operation, but when the inventors made a prototype and tested its usability, there was hardly any resistance 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 car 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 is no risk of duplicating the duplicate key 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, FIG. 2 is a cross-sectional view along the line of FIG. The figure is a front view of the partition plate, Figure 4 is a plan view of the first partition stopper plate, Figure 5 is an external perspective view of the cons bar, and Figure 6 is Figure 1-
Fig. 7 is a plan view of the inner cylinder;
9 is a plan view of the first release tumbler, FIG. 9 is a plan view of the construction key, and FIG. 10 is a plan view of the duplicate key. 1... Outer cylinder, 2... Tumbler locking groove, 3...
Inner cylinder, 4... Partition plate, 5... Keyhole, 12... Slot, 13... Tumbler, 13a... Locking part,
14...Key hole, 17...Cons bar, 17d
...Engaging protrusion, 18... Cons bar spring, 19...
...locking pin, 22...first release tumbler,
22a...Slope cam, 22b...Key insertion hole, 22
c...Cam hole, 22d...Slanted edge, 23...Second release tumbler, 23a...Connecting member, 2
3b...Restricted edge.

Claims (1)

[Scope of Claims] 1. An outer cylinder in which a tumbler locking groove is formed along the generatrix line on the inner circumferential surface, and a plurality of tumbler locking grooves rotatably fitted in the outer cylinder and stacked at a constant interval in the central axis direction. It has a partition plate and an inner cylinder with a keyhole passed through it along the central axis, and each slot formed between the partition plates of the inner cylinder has a width corresponding to the width of the key to be inserted into the keyhole. A tumbler is inserted into the tumbler locking groove and is guided so as to be able to swing in a direction, and is biased in a direction to engage the tumbler locking groove.
Keyholes of a size that can surround the keyhole are opened at different positions, and the opening edges of the keyholes are engaged with the grooves of the duplicate keys inserted into the keyholes, so that the ends of each tumbler are opened. The inner cylinder has a cons bar extending in the keyhole axis direction in proximity to the side edge of the tumbler and movably guided in the length direction thereof; a cons bar spring that biases the cons bar in its length direction; and a locking pin that is movably guided in the thickness direction of the key and engages with the cons bar at a position aligned with one of the slots in the keyhole axis direction. In addition to providing
When the cons bar is locked to the locking pin, an engaging protrusion is provided on a portion of the cons bar facing the side edge of each of the selected tumblers, and on the other hand, the selected tumbler facing the engaging protrusion A locking part that engages with the engagement projection is formed on the side edge of the cons bar, and when the construction key is activated, the locking pin locks the cons bar in a position where the engagement projection engages with the locking part of the tumbler. Then, the selected tumbler group is locked in a position where its edge aligns with the shear line, and the side edge that faces the engagement protrusion of the cons bar when inserted into the keyhole is cut out. On the other hand, a sloped cam is formed at one end of the slot facing the inner end of the locking pin, and the sloped cam is guided so as to be able to swing in the same direction as the tumbler, and the sloped cam locks the tumbler. A key insertion hole that is biased in the direction of engagement with the groove 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 farther from the keyhole as it approaches the inclined cam. A first release tumbler with an open opening and a second release tumbler with a connecting member integrally protruding from one side that engages with the cam hole are overlapped and inserted, and the connecting member is inserted into the slanted edge of the cam hole. In the locked state where the slope cam is engaged with the part closest to the keyhole and the slope cam is engaged in the tumbler locking groove of the outer cylinder, it is almost aligned with the opening edge on the slope cam side in the key width direction of the keyhole. A regulating edge is formed on the second release tumbler, and when the inner cylinder is rotated using the construction key, the first and second release tumblers are swung together, and the portion facing these release tumblers is When rotating the inner cylinder for the first time using a duplicate key that has secured the full width,
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, the second release tumbler releases the locking of the cons bar by the locking pin, the selected tumbler group is returned to the operating state, and the construction is completed. A tumbler lock with a construction key device, characterized in that the key device is released.