JPH0257635B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lever 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 rather a key having a regular key shape for unlocking one lock.

Conventional construction key devices, for example, use a locking member to lock selected tumblers from among a plurality of tumblers inside a lever tumbler lock in an unlockable position, that is, temporarily lock these selected tumblers during construction. be inactive,
During construction, a special construction key, which is different from the duplicate key that operates only the remaining tumblers in working condition, is used as a construction key, and after the construction is completed, the contractor uses a special tool to unlock the selected tumblers. I was trying to get it back 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 includes an outer cylinder in which a cam groove is formed along the generatrix of the inner circumferential surface, and the outer cylinder is rotatably fitted into the outer cylinder and stacked in the central axis direction with a gap therebetween. In addition to providing a plurality of partition plates, the inner cylinder has a keyhole passed through it along the central axis, and the inner cylinder extends along the generatrix of the inner cylinder and is guided so as to be movable in the radial direction on the outer periphery of the inner cylinder. and a locking bar whose outer edge that engages with the cam groove is biased in a direction protruding outward, and a locking bar having a generally C-shaped overall shape and having one end in each slot between the partition plates. It is pivotably supported, is biased in a direction that interferes with the side edge of the key inserted into the keyhole, and is normally locked to a back-up pin that passes through the inner cylinder in the axial direction, and has a free end. When a tumbler with a ridge notch formed on the outer edge to receive the inner edge of the locking bar is inserted, and each of these tumblers engages with a corresponding groove of a duplicate key inserted into the keyhole, each tumbler is unlocked. In a case where the lock notch is aligned with the inner edge of the locking bar, at least one of the above tumblers is designated as a release tumbler for releasing the construction key device, and the inner edge of the locking bar facing the release tumbler is provided with its longitudinal length. forming a cam surface inclined in the direction and guiding the entire locking bar so that it can move in the longitudinal direction, while designating at least one of the tumblers other than the release tumbler as a rest tumbler; Specially designed for construction work in which a conski groove is partially formed on the inner edge of the facing locking bar to receive the free edge of the resting tumbler, and the side edge of the part facing the resting tumbler is cut out when it is inserted into the keyhole. On the other hand, when the inner cylinder is rotated for the first time using a duplicate key with a key groove different from that of the construction key, the entire width is secured in the part facing the release tumbler, or a duplicate key is formed with a key groove different from that of the construction key. Press the cam surface of the locking bar toward the free outer edge of the release tumbler that is out of the unlocking notch, move the locking bar longitudinally by wedge action, and move the con-key groove from the position facing the resting tumbler. It is characterized in that the construction key device is released by moving it.

An embodiment 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 this outer cylinder 1 is a cylinder having a protrusion 2 integrally formed on a part of its outer periphery along its generatrix, and its inner A cam groove 3 parallel to the protrusion 2 is formed on the circumferential surface along the generatrix. In the illustrated embodiment, the cam groove 3 has a substantially V-shaped cross section.

Into the inner hole of the outer cylinder 1, an inner cylinder, which is designated as a whole by reference numeral 4, is rotatably fitted. This inner cylinder 4 is
As shown in FIG. 1, a plurality of partition plates 7 are provided between a key guide 5 in the form of a plate with a flange that is exposed on the outside of a door, etc., and a tail plug 6 that has a short cylindrical shape as a whole. They are arranged in a stacked manner in the axial direction of the inner cylinder. In the illustrated embodiment, first to fifth partition plates 7-1 to 7-5 are provided.

As shown in FIG. 3, each partition plate 7 is a plate-shaped body having a substantially circular overall shape, and arc-shaped insertion pieces 7a, 7a are integrally formed on both left and right sides in FIG. For example, there is a substantially W-shaped key insertion hole 7b in the center.
A circular back-up pin insertion hole 7c is open therein, and a circular support shaft hole 7d is opened at the upper end in FIG. Furthermore, the outer periphery of the key insertion hole 7b on the opposite side to the spindle hole 7d is notched in a convex shape as shown in the figure, and has a guide groove 7e for movably guiding a locking bar, which will be described later, in the radial direction of the inner cylinder. It is formed.

For example, five partition plates 7 formed as described above
-1 to 7-5, the key guide 5 and the tail plug 6
For example, the first retainer 8 has a structure as shown in FIG. 4, and the second retainer 9 (see FIG. 2) is formed to be plane symmetrical with the first retainer 8.
They are integrally connected to each other via the inner cylinder 4.

Therefore, the first retainer 8 is, for example, the fourth retainer 8.
As shown in the figure, it is a plate-shaped body that forms part of a thin cylinder with a flange 8a, and a main body part 8b that forms a part of the cylinder has a plurality of (seven in the illustrated embodiment) along the generatrix. Elongated rectangular receiving holes 8c, 8c are open at a predetermined interval. Further, on the side edge of the main body portion 8b, a plurality of first spacer pieces 8d and a plurality of second spacer pieces are provided, respectively, with the substantial portion between the receiving holes 8c and 8c extending along the circumferential direction. 8e, 8e are integrally provided in a comb-teeth shape,
The tip of each first spacer piece 8d is bent in the central axis direction.

Then, insert an insertion piece (not shown) formed on the flange portion of the key guide 5 in the same manner as the partition plate 7 shown in the third figure into the receiving hole 8c closest to the flange 8a of the first retainer 8, Following this, the first
One insertion piece 7 of the fifth partition plates 7-1 to 7-5
a into the corresponding receiving hole 8c (see Fig. 2),
The support shaft 11 and the backup pin 12 are inserted into the support shaft hole 7d of each partition plate 7 and the backup pin insertion hole 7.
c (see Figure 3), both ends were restrained by the key guide 5 and tail plug 6 (see Figure 1), and an insertion piece (not shown) was integrally formed on the outer periphery. The tail plug 6 is engaged with the first retainer 8 by inserting its insertion piece into the receiving hole 8c furthest from the flange 8a of the first retainer 8 shown in the fourth figure, and the tail plug 6 is engaged with the first retainer 8 on the opposite side of the first retainer 8. from the second
A retainer 9 (see FIG. 2) is similarly fitted to form the inner cylinder 4. In order to prevent the inner cylinder 4 from slipping out from the outer cylinder 1, as shown in FIG.
For example, E-
A ring 13 is fitted. Note that the flange portions 8a (see FIG. 4) of the first and second retainers 8, 9 are locked to the outer end surface of the outer cylinder 1 (see FIG. 1),
This prevents the inner cylinder 4 from slipping out inward (to the right in FIG. 1).

In addition, as shown in FIG. 1, the key guide 5 and the tail plug 6 have an opening that has the same shape as the key insertion hole 7b of the partition plate 7, and these openings are aligned with the key insertion hole 7b of the partition plate 7. A keyhole 14 passing through in the axial direction is formed.

On the other hand, as shown in FIGS. 1 and 2, a locking bar 15 is guided on the outer periphery of the cylinder 4 so as to be movable in the radial direction of the inner cylinder. In the illustrated embodiment, the locking bar 15 is a rod-shaped body with a convex cross section, and the locking bar 15 is a rod-shaped body having a convex cross section.
(Fig. 3), and its outer edge is formed as a chevron-shaped ridge in cross section that engages with the cam groove 3 of the outer cylinder.

The locking bar 15 is biased in a direction in which the outer edge of the chevron-shaped cross section protrudes outward by the elasticity of a pair of compression coil springs 16, 16 elastically mounted between the inner edge thereof and the back-up pin 12. There is. In addition, in the illustrated embodiment, the locking bar 1
The inner end of 5 receives elasticity from a compression coil spring 16 via a click ball 18 engaged in a mortar-shaped click seat 17 formed on the inner edge.

On the other hand, lever tumblers (hereinafter simply referred to as tumblers) 21 are inserted into slots 19 between the partition plates 7 or between the partition plates and the key guide 5 or tail plug 6, respectively.

This tumbler 21, as shown in FIG.
It is a plate-like body whose overall shape is approximately C-shaped, and is swingably supported by the support shaft 11 passing through one end (the upper end in FIG. 2) of the plate-like body. In addition, in FIG. 2, the C-shaped opening of the tumbler 21 is depicted facing left, but depending on the shape of the key inserted into the keyhole 14, the opening may face right. Of course, there are also slots in which it is arranged.

The center of the inner edge of the tumbler 21 is biased toward the side edge of the key by the elasticity of the leaf spring 22, which is elastically loaded between one end of the tumbler 21 and the retainer. As shown in FIG. 2, when the key is not inserted into the keyhole 14, it is locked by the back-up pin 12 and its rotational position within the inner cylinder 4 is restricted.

Furthermore, an unlocking notch 23 is formed on the outer edge of the free end of each tumbler 21 at a position determined according to the depth of the groove on the side edge of the duplicate key that the tumbler faces. ing.

Therefore, in the lever tumbler lock with a construction key device according to the present invention, at least one of the plurality of (six in the illustrated embodiment) tumblers 21, 21 attached to the inner cylinder 4 as described above is is designated as the release tumbler 21-R. In the first illustrated embodiment, the outermost tumbler between the key guide 5 and the first partition plate 7-1 is designated as the release tumbler 21-R. Further, among the plurality of tumblers 21, 21 attached to the inner cylinder 4, at least one other than the above-mentioned release tumbler is designated as a rest tumbler 21-S. In the embodiment shown in the first figure, three tumblers located inside between the third partition plate 7-3 and the tail plug 6 are designated as the rest tumblers 21-S.

On the other hand, a cam surface 24 inclined in the longitudinal direction is formed at the outer end of the inner edge of the locking bar 15 facing the release tumbler 21-R. In the embodiment shown in FIG. 1, the cam surface 24 is formed as a slope that descends toward the outside (to the left in FIG. 1).

Further, on the inner edge of the locking bar facing the above-mentioned resting tumbler 21-S, the resting tumbler 21-S is
Consky groove 25 for receiving the free edge of S,
25 is partially formed. In the embodiment shown in the first figure, there are three inner tumblers 21-S, so there are three
Conski grooves 25, 25 are formed.

Furthermore, in the cons tumbler lock according to the present invention, the length of the locking bar 15 is such that it can move not only in the radial direction of the inner cylinder but also in its longitudinal direction (left and right directions in FIG. 1). It is set shorter than groove 3. In the illustrated embodiment, the two cone-shaped click seats 17, 17 are connected to the inner end of the inner edge of the locking bar 15 in the longitudinal direction. 1
It is possible to move inward by a distance of 7 and 17.

When the construction key device is in operation, as shown in Figure 1,
The click ball 18 is engaged in the click seat 17 of the locking bar 15, and through the engagement between the click seat 17 and the click ball 18 and the engagement between the click ball 18 and the compression coil spring 16, the locking bar 15 is Movement in this direction is elastically restrained by the inner cylinder 4.

On the other hand, the construction key CK of the cons tumbler lock according to the present invention, as shown in FIG. The side edge of the tumbler 21-R is cut out and becomes thinner, but the side edges facing the other three tumblers, including the release tumbler 21-R, have key grooves g ₁ , g ₂ and g _3, respectively. When the release tumbler and the other two tumblers are engaged in these key grooves, the release notches of each tumbler are aligned with the inner edge of the locking bar 15.

In contrast, the duplicate key IK's release tumbler has 2
There is no keyway formed on the side edge of the part facing 1-R, and the full width of the key is secured in that part.
Key grooves g ₂ to _{g 6} are formed in the portions facing the other tumblers 21 and 21, respectively. When the inner edge of the tumbler 21 corresponding to each of these key grooves g ₂ to _{g 6} is engaged, the unlocking notch (FIG. 2) of each tumbler 21 is aligned with the inner edge of the locking bar 15 as in the conventional method. It is similar to a lever tumbler lock.

In the constable lock according to one embodiment of the present invention configured as described above, when the construction key device is activated, as shown in FIG.
The locking bar 15 is located close to the key guide 5, and at this time, the cam surface 24 faces the release tumbler 21-R, and the conski groove 25 faces the pause tumbler 21-S. When the construction key CK (Fig. 5) is inserted into the keyhole 14, the other two tumblers 21, 21 (Fig. The unlocking notches 23 (Fig. 2) of the three tumblers on the left align with the inner edge of the locking bar 15 (not shown), but the rest tumblers 21-S, 21-S
The second
As shown in the figure, the unlocking notches 23, 23 are not aligned with the inner edge of the locking bar 15.

When the inner cylinder 4 is rotated together with the construction key CK in this state, the locking bar 15 is
is pushed toward the center of the inner cylinder. At this time, the unlocking notches 23 of the three outer tumblers including the release tumbler 21-R are aligned with the inner edge of the locking bar 15, and the rest tumbler 21-R is aligned with the inner edge of the locking bar 15.
Since a conski groove 25 (Fig. 1) is formed on the inner edge of the locking bar facing S and 21-S, there is nothing that prevents the locking bar 15 from moving toward the center of the inner cylinder. The tube can be rotated through a predetermined angle. In other words, it can be locked and unlocked using the construction key CK.

When another construction key is inserted into the keyhole 14, the unlocking notch 23 of at least one of the three outer tumblers does not align with the locking bar 15, so the locking bar 15 is inserted through the free end of this tumbler 21. Backup pin 1
2 and cannot move toward the center of the inner cylinder, the inner cylinder 4 cannot rotate. The same applies to a key in which a keyway is formed on the side edge facing the resting tumbler 21-S.

On the other hand, when the duplicate key IK is inserted into the keyhole 14, the side edge of the duplicate key IK facing the release tumbler 21-R is not cut out and the full width is secured (see Figure 6), so the release tumbler 21-R is keyhole 1
The unlocking notch 23 swings in the direction away from 4.
is no longer aligned with the inner edge of the locking bar (not shown), but the unlocking notches 23 of the other five tumblers, including the resting tumbler, are aligned with the locking bar 15.
As mentioned above, it is consistent with this.

When the inner cylinder is urged in the rotational direction by the duplicate key IK in this state, the cam groove 3 of the outer cylinder pushes the locking bar 15 toward the center of the inner cylinder as described above, and the cam surface formed on the locking bar 24 comes into contact with the outer edge of the release tumbler 21-R, and when the locking bar 15 further moves toward the center of the inner cylinder, the locking bar 15 is pushed inward by a wedge action. That is, the cam surface 24 is connected to the release lever 2.
A component of the reaction force received from 1-R in the longitudinal direction of the locking bar pushes the locking bar 15 inward along its longitudinal direction. When the click ball 18 that was fixedly seated on the inner click seat 17 is pushed up and crosses the boundary with the adjacent click seat 17, the compression coil spring 16 that presses the click ball 18 against the locking bar 15 is activated. Due to its elasticity, the click ball 18 hits the outer click seat 1.
At this time, due to the wedge action generated between the click ball 18 and the inner surface of the click seat 17, the locking bar moves further inward, and finally, as shown in FIG. The click ball 18 is located outside the click seat 17.
completely depressed. In this way, the locking bar 15 moves inward by the distance between the two click seats 17, 17 by the first unlocking operation using the duplicate key IK, and the position after the movement is the click ball 1.
8 and compression coil spring 16, it is held elastically and stably.

At this time, as is clear from FIG.
Since it is removed from the position facing -S and 21-S, the resting tumbler has the function of a tumbler for a tumbler lock. That is, the construction key device is released and the construction key device according to the invention is released.
The tumbler lock becomes a normal lever tumbler lock. Note that after the construction key device is released, the inner edge of the locking bar 15 facing the release tumbler 21-R has moved, so the release tumbler no longer functions as a tumbler.
This does not pose an obstacle to subsequent locking and unlocking operations using the duplicate key IK.

After releasing the construction key device, use the construction key CK (5th
It goes without saying that even if you try to unlock the door using the construction key CK, you will not be able to unlock it because the shape of the construction key CK is different from that of the duplicate key IK (see FIG. 6).

As is clear from the above description, in the present invention, the construction key device is unlocked by an unlocking operation using a duplicate key, so there is no need for a special unlocking tool as described above, and the construction key device is used to unlock the construction key device. The work of releasing the 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 possibility of duplicating the duplicate key from the construction key.

In addition, in the illustrated embodiment, no key groove is carved on the side edge of the duplicate key facing the release tumbler, and the entire width is ensured. Of course, the construction key device can be released.

Further, the release tumbler does not necessarily need to be provided at the outer end of the inner cylinder, and any tumbler can be designated as the release tumbler. The same applies to idle tumblers, including their number.

Furthermore, the direction of movement of the locking bar when releasing the construction key device may also be from the inside to the outside.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing the operating state of the construction key device of a cons/tumbler lock according to an embodiment of the present invention, Fig. 2 is a cross-sectional view thereof, Fig. 3 is a plan view of the partition plate, and Fig. 4 is an external perspective view of the retainer, FIG. 5 is a plan view of the construction key,
FIG. 6 is a plan view of the duplicate key, and FIG. 7 is a longitudinal sectional view similar to FIG. 1 showing the construction key device in a released state. 1... Outer cylinder, 3... Cam groove, 4... Inner cylinder, 7...
...Partition plate, 8, 9...Retainer, 11...Spindle,
12...Backup pin, 14...Keyhole, 15
...Locking bar, 19...Slot, 21...
...Tumbler, 21-R...Release tumbler, 2
1-S...Stop tumbler, 23...Unlock notch,
24...Cam surface, 25...Conski groove, CK...
…construction key, IK…duplicate key, g…
...Keyway.

Claims (1)

[Scope of Claims] 1. An outer cylinder in which a cam groove is formed along the generatrix of the inner circumferential surface, and a plurality of partition plates rotatably fitted to the outer cylinder and stacked in the central axis direction with gaps therebetween. and an inner cylinder having a keyhole passed through it along the central axis, and an inner cylinder extending along the generatrix of the inner cylinder and movably guided in the radial direction by the outer circumference of the inner cylinder, and the cam. It has a locking bar whose outer edge that engages with the groove is biased in a direction protruding outward, and a locking bar having a generally C-shaped overall shape and having one end swingably attached to each slot between the partition plates. It is supported and biased in a direction that interferes with the side edge of the key inserted into the keyhole, and is normally locked by a back-up pin that passes through the inner cylinder in the axial direction, and has a locking bar on the outer edge of the free end. When each tumbler group is engaged with the corresponding groove of the duplicate key inserted into the keyhole, the unlocking notch of each tumbler is inserted into the locking bar. At least one of the group of tumblers is designated as a release tumbler for releasing the construction key device, and a cam inclined in the longitudinal direction of the locking bar facing the release tumbler is provided. forming a surface and guiding the entire locking bar so that it can move in the longitudinal direction, while designating at least one of the tumblers, excluding the release tumbler, as a rest tumbler, and an inner edge of the locking bar facing the rest tumbler; A lever tumbler lock with a construction key device, characterized in that a con-key groove for receiving a free edge of a resting tumbler is partially formed in the lever. 2. The construction key according to claim 1, wherein the cross-sectional shape of the cam groove of the outer cylinder is approximately V-shaped, and the outer edge of the locking bar that engages with the cam groove has a chevron-shaped cross section. Lever tumbler lock with device. 3. A lever tumbler lock with a construction key device according to claim 1 or 2, characterized in that it has a plurality of resting tumblers.