JPH0213712B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tumbler lock with a construction key device (hereinafter simply referred to as a cons tumbler lock), and particularly to a cons tumbler lock in which the construction key device can be unlocked with a duplicate key.

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.It is a device that streamlines the construction worker's locking/unlocking work and key management work during construction. It was devised to ensure greater safety for owners and residents. 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.

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.

In order to achieve the above object, the present invention has 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 kept at a constant interval in the direction of the center 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 above-mentioned inner cylinder, a cons bar extending in the keyhole axis direction and having an inner surface facing the side edge of the tumbler is provided movably in the thickness direction of the key, and a plurality of selected cons bars facing the cons bar are provided. An engaging portion capable of engaging with the cons bar is formed on the side edge of the selected tumbler, and the cons bar is placed in a position close to the keyhole and engaged with the tumbler when the construction key device is activated. The tumblers are locked in a position where their edges align with the shear line, and a construction key specifically designed for construction work is cut out at the side edge of the part that faces the cons bar when inserted into the keyhole. On the other hand, a sloped cam is formed at one end of at least one slot facing the cons bar, and the sloped cam is guided to be swingable in the same direction as the tumbler, and the sloped cam engages in the tumbler locking groove. a key insertion hole having an opening that does not interfere with the keyhole in any swing position; and a cam hole having an inclined edge that is spaced apart from the keyhole as it approaches the inclined cam. The first release tumbler and the second release tumbler, which has a connecting member integrally protruding from one side that engages with the cam hole, are superimposed and inserted, and the first release tumbler is released by the action of the inclined cam when the inner cylinder rotates. At the same time, the connecting member engages with the portion of the inclined edge of the cam hole closest to the keyhole, and the inclined cam of the first release tumbler engages with the tumbler locking groove of the outer cylinder. In the locked state, a second release tumbler is formed with a regulating edge that is close to the opening edge on the inclined cam side from the outside in the key width direction of the keyhole, and the inner cylinder is opened using the construction key. When rotating, the first and second release tumblers are swung together, and when rotating the inner cylinder, the side edge of the duplicate key is rotated by using a duplicate key whose full width is secured in the portion facing these release tumblers. The second release tumbler 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 causes the second release to be released. The tumbler is moved in a direction away from the keyhole, the second release tumbler causes the cons bar to retreat from the engagement position with the selected tumbler group, and the selected tumbler group is returned to an operating state. It is characterized in that the construction key device is released by pressing the button.

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

In FIGS. 1 and 2, reference numeral 1 indicates an outer cylinder, and a tumbler locking groove 2 is formed on the inner peripheral surface of the outer cylinder 1 along the generatrix direction. In the illustrated embodiment, this tumbler locking groove 2
are shown as openings communicating with the outer surface, and are provided at two symmetrical locations with respect to the central axis of the outer cylinder 1.

An inner cylinder 3 is rotatably fitted inside the outer cylinder 1. This inner cylinder 3 has a plurality of partition plates 4, 4 stacked in the direction of the central axis at regular intervals.
is provided, and a keyhole 5 passes through the inner cylinder 3 along its central axis.

A plurality of (first
Each of the slots 6, 6 (10 slots in the illustrated embodiment) has a slot in the width direction (second slot) of the key inserted into the keyhole 5.
The direction in which the tumbler is engaged in the tumbler locking groove 2 (downward in FIG. 2)
A slender plate-shaped tumbler 7 is inserted, and each tumbler 7 has a keyhole 5 in its center.
Keyholes 8 of a size that surrounds the keyholes 5 are opened at different positions, and the opening edge of the keyhole 8 (the upper edge in the embodiment shown in the second figure) and the keyhole 5 are opened at different positions.
The edge of each tumbler 7 is aligned with the shear line by engaging with a groove formed on the side edge of the duplicate key inserted into the tumbler. Since the structure and function of the cons tumbler lock according to the present invention as a tumbler lock are similar to those of a conventional tumbler lock, further detailed explanation will be omitted.

Although the inner cylinder in the embodiment shown in FIGS. 1 and 2 is shown as being machined from a solid bar, this is only shown to simplify the drawings. Of course, the inner cylinder 3 is actually constructed by combining partition plates punched out by press working into one body using plate materials.

Further, the tumblers 7 are urged to alternately protrude in the vertical direction.

Furthermore, in FIG. 2, reference numerals 9 and 9 indicate pins that extend longitudinally through the inner cylinder 3 and are parallel to each other and to the central axis of the inner cylinder. It also functions as a spring holder for the compression coil spring 11 that biases the tumbler 7, a protrusion position regulating member for the tumbler 7, etc., and a guide member for the tumbler 7.

Therefore, in the inner cylinder 3, there are
As shown in the figure, a cons bar 12 that extends in the keyhole axis direction and whose inner surface faces the side edges of the tumbler 7 is provided so as to be movable in the thickness direction of the key (left and right in FIG. 2). In the illustrated embodiment, the cons bar 12 is a bar with a rectangular cross section, and is fitted into an elongated rectangular opening in the side plate of the inner cylinder 3 on the opposite side from the pins 9, 9, and is pressed by a cons bar pressing spring 13. is urged in the direction of thrusting into the interior of the inner cylinder 3,
Its entry position is determined by coming into contact with the partition plate 4.

Further, on the upper surface of the cons bar 12, for example, an arc-shaped fixing groove 14 having a constant width is formed.
Furthermore, the upper surface of the cons bar 12 that protrudes outside the side surface of the inner cylinder 3 is pressed by a cons bar fixing spring 15 that is partially shaped into an arc shape so that it can easily fit into the fixing groove 14.

Furthermore, a cons bar 12 is attached to the side edge of a plurality of (four in the illustrated embodiment; see FIG. 3) selected tumblers 7 facing the cons bar 12.
An engaging portion (notch in FIG. 2) 16 that can be engaged with the
is formed.

On the other hand, at least one
The two slots 6 (in the illustrated embodiment, the fifth and eighth slots counting from the keyhole entrance, as shown in FIG. 3) have first and eighth slots for unlocking the construction key device. Two release tumblers 17 and 18 are inserted one above the other (see FIG. 1).

As shown in FIG. 4, the first release tumbler 17 is an elongated plate-like body with a chevron-shaped slope cam 17a formed at one end, and as shown in FIG. It is guided so as to be able to swing in the same direction as the tumbler 7 by 9, 9 and the front and rear partition plates 4, 4, and the slanted cam 17a is moved into the tumbler locking groove 2 by the elasticity of the compression coil spring 11.
is biased in the direction of engagement.

In addition, in the center of the first release tumbler 17,
As shown in FIGS. 4 and 5, a key insertion hole 17b of a size that does not interfere with the keyhole 5 is open in any of the swinging positions, and furthermore, the side edge opposite to the cons bar 12 has a key insertion hole 17b. The portion is cut out so as not to interfere with the cons bar 12 protruding inside the inner cylinder. Furthermore, the first release tumbler 1
A pair of cam holes 17c, 17c are opened at the end of the cam 7 along the swinging direction. This cam hole 17
c has an inclined edge 17d that becomes more distant from the keyhole 5 as it approaches the inclined cam 17a.

On the other hand, as shown in FIG. 5, the second release tumbler 18 is, for example, a plate-like body whose overall shape is approximately C-shaped, and the portion that overlaps with the cam holes 17c, 17c is located on the first release tumbler 17 side. The cut and raised portion is used as the first connecting member 18a.
It protrudes integrally from the joint surface with the release tumbler and engages with the cam hole 17c.

Further, as shown in FIG. 5, the connecting member 18
a is engaged with the part of the inclined edge 17d of the cam hole (see FIG. 4) closest to the keyhole 5, and the inclined cam 17a of the first release tumbler is engaged with the tumbler locking groove 2 of the outer cylinder. In the locked state, the regulating edge 19 formed on the second release tumbler 17 is close to the opening edge (upper end in FIG. 5) of the keyhole 5 on the slope cam 17a side in the key width direction from the outside. There is.

Such first and second release tumblers 17
and 18 are also provided in the eighth slot with the inclined cams facing in opposite directions.

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 12 is pressed against the cons bar pressing spring 13 as shown in FIG.
Due to the elasticity of the tumbler 7 close to the keyhole 5
arranged in a position to engage with the notch 16 of the
Each of the selected tumblers 7 is locked at a position where the edge aligns with the shear line. It goes without saying that other tumblers adjacent to the tumbler 7 shown in the second diagram are engaged with the lower side of the cons bar 12.

As a result, as shown in Figure 3, the cons bar 1
The four central tumblers facing the inner surface of No. 2 are inoperative.

Therefore, as shown in FIG. 6, when the construction key CK whose side edge facing the cons bar 12 is cut out to make it thinner is inserted into the keyhole,
The edges of the two front and rear tumblers (see FIG. 3) in the operating state align with the shear line, and the inner cylinder 3 becomes rotatable. That is, the cons tumbler lock is in the unlocked state when the construction key device is activated.

For example, when the construction key CK is turned clockwise, the inner cylinder 3 also rotates as shown in FIG.
When the inclined cam 17a that has been engaged with the cam 17a is disengaged from the cam 17a, the first release tumbler 17 is pushed inward. However, since the portion of the construction key CK facing the first and second release tumblers 17, 18 is tapered (see Figure 6), there is nothing that obstructs the movement of these release tumblers, and these first and second release tumbler 17,
18 swings integrally. Therefore, no force is applied to the cons bar 12 from the second release tumbler 17, and the construction key device is kept in the activated state.

On the other hand, when the duplicate key IK is inserted into the keyhole as shown in FIG. 8, the edges of all the tumblers of this constable lock are aligned with the shear line, and the lock is in the unlocked state. The parts of the duplicate key IK of the cons tumbler lock according to the present invention facing the first and second release tumblers 17 and 18 are not cut out,
Although it is designed to ensure the full width, as shown in Fig. 5, the first and second tumblers 17 and 18 do not interfere with the keyhole 5 in the locked state, so they do not interfere with the insertion of the duplicate key IK. Must not be.

Although the four tumblers in the center of the inner cylinder are inactive, there are four active tumblers, two in the front and two in the front, that have a different key shape than the duplicate key, and in the above-mentioned operating state. Even if the key shape for the tumbler is the same as that of the duplicate key, it goes without saying that the cons tumbler lock cannot be unlocked with a different key that has a shallow keyway corresponding to the inactive tumbler.

When the duplicate key is inserted and turned clockwise, for example, the first release lever 17 is pushed inward in the same way as when the construction key CK is inserted, but unlike the construction key, the first release lever 17 is pushed inward. In this case, the regulating edge 19 of the second release tumbler immediately comes into contact with the side edge of the duplicate key whose full width has been secured as described above (see FIG. 9), and from then on, the second release tumbler 18 is released from the key. It becomes impossible to move in the width direction. Nevertheless, the first release tumbler 17 is pushed further inward, so that the inclined edge 17d (see FIG. 4) of the cam hole 17c of the first release tumbler is pushed into the second release tumbler as shown in FIG. Connecting member 18a protruding from the release tumbler (see Figure 5)
is pushed outward in the key thickness direction by a wedge action, and the side edge of the second release tumbler 18, which is integrated with this, resists the elasticity of the cons bar pressing spring 13,
Push the cons bar 12 outward. Then, the cons bar fixing spring 15 snaps into the cons bar's fixing groove 14 (see FIGS. 1 and 2), and thereafter the cons bar 12 is fixed in the retracted position.

Then, as shown in FIG.
2 is disengaged from the engaging portion 16 of the selected tumbler, and as shown in FIG.
All tumblers in the tumbler lock are activated.
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.

After release of the construction key device, the cons tumbler lock according to the invention functions as a normal tumbler lock. It should be noted that with this tumbler lock, the release tumbler also swings each time the lock is unlocked, but when the present inventors made a prototype and investigated its usability, there was hardly any resistance felt.

Also, after releasing the construction key device,
As shown in Figure 12, the lock cannot be unlocked even if the construction key CK used during construction is inserted.
Since the reason is clear from FIG. 12, detailed explanation will be omitted.

As is clear from the above description, in the present invention, the construction key device is unlocked by unlocking the construction key device using a duplicate key, so there is no need for the above-mentioned special tools, and the construction key device can be unlocked easily. 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 drawings]

FIG. 1 is a partially sectional side view of a cons tumbler lock according to an embodiment of the present invention, and FIG.
A cross-sectional view drawn by a line shows the operating state of the construction key device, FIG. 3 is a line diagram showing the state of the tumbler when the construction key device is activated, and FIG. 4 is a front view of the first release tumbler.
Fig. 5 is a cross-sectional view taken along the lines of Fig. 1, Fig. 6 is a line diagram for explaining the state of the tumbler when the construction key is inserted into the cons tumbler lock shown in Fig. 3, and Fig. 7. 8 is a sectional view showing the operation of the release tumbler when the construction key is inserted to unlock the lock, and FIG. 8 is a sectional view showing the state of the tumbler when the duplicate key is inserted into the cons tumbler lock shown in FIG. 3. Diagram similar to, No. 9
The figure is a cross-sectional view showing the operation of the release tumbler when the duplicate key is inserted and unlocked, Figure 10 is a cross-sectional view similar to Figure 2 and shows the construction key device in the unlocked state, and Figure 11 is FIG. 12 is a diagram showing the state of the tumbler when the construction key device is released, and FIG. 12 is a diagram showing the state of the tumbler when the construction key is inserted into the cons tumbler lock shown in FIG. 11. 1...Outer cylinder, 2...Tumbler locking groove, 3...Inner cylinder,
4... Partition plate, 5... Key hole, 6... Slot, 7... Tumbler, 8... Key hole, 9... Pin, 11... Compression coil spring, 12... Cons bar, 16... Engaging portion, 1
7...First release tumbler, 17a...Slope cam, 1
7b...key insertion hole, 17c...cam hole, 17d...slanted edge, 18...second release tumbler, 18a...connecting member, 19...regulating edge, CK...construction key, IK...duplicate key.

Claims (1)

[Scope of Claims] 1. An outer cylinder having a tumbler locking groove formed along the generatrix on its inner peripheral surface, and a plurality of tumbler locking grooves rotatably fitted to 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 is provided with a cons bar extending in the keyhole axis direction and whose inner surface faces the side edge of the tumbler so as to be movable in the thickness direction of the key. An engaging portion capable of engaging with the cons bar is formed on the side edge of a plurality of selected tumblers facing the cons bar, and when the construction key device is activated, the cons bar is positioned close to the keyhole and engaged with the tumbler. Then, the selected tumblers were locked in a position where their edges aligned with the shear line, and the side edges of the parts facing the cons bar when inserted into the keyhole were cut out. A construction key dedicated to construction work can be used, and at least one slot facing the cons bar is provided with an inclined cam at one end, and is guided so as to be swingable in the same direction as the tumbler. A key insertion hole that is biased in the direction of engagement with the locking groove and has an opening that does not interfere with the keyhole in any swing position, and an inclined edge that is spaced apart from the keyhole as it approaches the inclined cam. A first release tumbler with a cam hole opened 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 slope cam is released when the inner cylinder rotates. The action causes the first release tumbler to be pushed inward, the connecting member engages with the portion of the slanted edge of the cam hole closest to the key hole, and the slanted cam of the first release tumbler is pushed outward. In the locked state in which the tumbler is engaged in the tumbler locking groove of the cylinder, a regulating edge is formed on the second release tumbler that approaches the opening edge on the inclined cam side from the outside in the key width direction of the keyhole, and the construction key When rotating the inner cylinder using a key, the first and second release tumblers are swung together, and when rotating the inner cylinder using a duplicate key whose full width is secured 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 moves the second release tumbler in a direction away from the keyhole, and the second release tumbler causes the cons bar to retreat from the engagement position with the selected group of tumblers, and the selected tumblers A tumbler lock with a construction key device, characterized in that the construction key device is released by returning the group to an operating state.