JPH039988B2 - - 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 refers to a key having a regular key shape for unlocking a single lock.

For example, a conventional construction key device uses a locking member to unlockably lock a plurality of tumblers selected from among a plurality of tumblers inside a lever tumbler lock, that is, to temporarily lock the selected tumblers during construction. During the construction work, a dedicated construction key, which is different from the duplicate key, is used to operate only the remaining tumblers that are in operation, and after the construction is completed, the contractor uses a special tool to remove the tumblers selected above. I was trying to release the lock and return it 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, and thereby to facilitate 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 cam groove is formed along the generatrix of the inner circumferential surface, and the outer cylinder is rotatably fitted into the outer cylinder and laminated in the direction of the central axis through a spacer. 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 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 has a generally C-shaped overall shape and a locking bar at one end in each slot between the partition plates. is pivotably supported and 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. A tumbler with an unlocking notch formed on the outside edge to receive the inside edge of the locking bar is inserted, and when each of these tumblers engages with the corresponding groove of the duplicate key inserted into the keyhole, each tumbler's In a device in which the unlocking notch is aligned with the inner edge of the locking bar, a bulge is formed at one end of the cam groove, and when the construction key device is in operation, the bulge moves one end of the locking bar in the direction of the inner cylinder center axis. The locking bar is pushed up to incline the locking bar, and the locking bar is made shorter than the cam groove so that the locking bar can move in the longitudinal direction, and a lock is provided on the outer edge of the locking bar near the contact portion with the jetty to receive the jetty. At least one tumbler facing the other end of the locking bar is designated as a release tumbler for releasing the construction key device, and a cam inclined in the longitudinal direction of the locking bar is provided on the inner edge of the locking bar facing the release tumbler. On the other hand, at least one of the tumblers excluding the release tumbler is designated as a resting tumbler, and a conski groove for receiving the automatic edge of the resting tumbler is provided on the inner edge of the locking bar facing the resting tumbler. This makes it possible to use a construction key specifically designed for construction work, which has a notch in the side edge of the part that faces the resting tumbler when inserted into the keyhole, and at the same time, it is possible to use a construction key that is used exclusively for construction work. The engagement of the locking bar with the con key groove prevents the locking bar from moving in the longitudinal direction, and the entire width of the part facing the release tumbler is ensured, or a duplicate key with a key groove different from that of the construction key is used. When the inner cylinder rotates for the first time, the cam surface of the locking bar is pressed toward the free outer edge of the unlocking tumbler that is removed from the unlocking notch, and the locking bar is moved in the longitudinal direction by a wedge action. The structure is characterized in that the construction key device is released by engaging the jetty in the locking groove to correct the inclination of the locking bar and at the same time moving the con-key groove from a position facing the resting tumbler.

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 sixth partition plates 7-1 to 7-6 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, six partition plates 7 formed as described above
-1 to 7-6, 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 forming a part of a thin cylinder with a flange 8a, and a main body part 8b forming a part of the cylinder has a plurality of (eight 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 sixth partition plates 7-1 to 7-6
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 flanges 8a of the first and second retainers 8, 9 (see Fig. 4)
is locked to the outer end surface of the outer tube 1 (see FIG. 1), and prevents the inner tube 4 from slipping out inward (to the right in FIG. 1).

Further, as shown in FIG. 1, the key guide 5 and the tail plug 6 also have openings aligned with the key insertion hole 7b of the partition plate 7, and these openings open the inner cylinder. 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 circumference of the guide tube 4 so as to be movable in the radial direction of the inner tube. 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.
e and 7e (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.

Therefore, in the cons tumbler lock according to the present invention, a jetty 17 is formed at one end of the cam groove 3 (the right end in FIG. 1), and when the construction key device is operated, the locking bar 15
is attached to the inner cylinder 4 in an inclined state with one end pushed up in the direction of the central axis of the inner cylinder by the jetty 17. Note that in order to form the jetty 17 in the cam groove 3, for example, a slit is cut in the radial direction from the protrusion 2 side of the outer cylinder 1, and a jetty plate having an approximately T-shaped outer shape (see Fig. 2) is fitted into the slit. wear it.

Further, the length of the locking bar 15 is set to be shorter than that of the cam groove 3, so that the locking bar can be moved slightly in the longitudinal direction.

Furthermore, the above-mentioned jetty 1 of the rocking bar 15
As shown in FIG. 1, a locking groove 18 having a trapezoidal cross section, for example, is formed at a depth capable of receiving the jetty 17 at the outer edge near the contact portion with the jet 7. As shown in FIG. The length of the locking bar 15 is determined so that it can move to the right in FIG. 1 at least to the extent that the jetty 17 falls into the locking groove 18 and the inclination of the locking bar 15 can be corrected.

In addition, as shown in FIG.
The outer edge of the chevron-shaped cross section is biased in a direction to protrude outward.

On the other hand, lever tumblers (hereinafter simply referred to as tumblers) 21 are inserted into the 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 having a generally C-shaped overall shape, 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 a leaf spring 22 that 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 cons tumbler lock according to the present invention, a plurality of (seven in the illustrated embodiment) tumblers 2 are attached to the inner cylinder 4 as described above.
At least one of the tumblers 1 and 21 is designated as the release tumbler 21-R. In the embodiment shown in the first figure, the outermost tumbler between the key guide 5 and the first partition plate 7-1 is the release tumbler 21-
It is designated as 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 first illustrated embodiment, five tumblers located inside between the second partition plate 7-2 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 formed. In the embodiment shown in the first figure, there are five inner (right) resting tumblers 21-S, so five conskive grooves 25, 25 are formed on the corresponding inner edges of the locking bar 15.

However, as mentioned above, the locking bar 15
Since one end is pushed up by the jetty 17, there are differences in degree depending on the position of the conski groove 25 in the longitudinal direction of the locking bar 15, but the difference between the rest tumbler 21-S and the conski groove 25
This engagement prevents longitudinal movement of the locking bar 15 during operation of the construction key device.

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 notched and becomes thinner, but the side edge facing the other two tumblers, including the release tumbler 21-R, has corresponding key grooves _g1.
and g ₂ are formed, and when the release tumbler 21-R and another tumbler engage in these keyways, the release notch 23 (second
) is aligned with the inner edge of the locking bar 15.

On the other hand, as shown in Figure 6, the duplicate key IK
There is no keyway formed on the side edge of the part facing the release tumbler 21-R, and the full width of the key is secured in that part, and each part facing the other tumblers has a keyway g. ₂ ~ g ₇ are formed. When the inner edge of the tumbler 21 corresponding to each of these key grooves _g2 to _g7 is engaged, the unlocking notch 23 of each tumbler 21 is aligned with the inner edge of the locking bar 15, unlike the conventional lever tumbler lock. The same is true.

In the cons tumbler lock according to one embodiment of the present invention configured as described above, when the construction key device is in operation, the locking bar 15 is tilted by the jetty 17 and the key guide 5 is tilted, as shown in FIG. At this time, the cam surface 24 is located close to the release tumbler 21-R.
The conski grooves 25 each face the corresponding rest tumbler 21-S. When the construction key CK (FIG. 5) is inserted into the keyhole 14, the rest tumblers 21-S, 21-
The unlocking notches 23 (FIG. 2) of the other two tumblers (including the release tumbler 21-R) other than S are aligned with the inner edge of the locking bar 15 (not shown), but the rest tumblers 21-S and 21 -S does not come into contact with the construction key CK, or swings only slightly even if it does, so its unlocking notches 23, 23 are not aligned with the inner edge of the locking bar 15, as shown in FIG. be.

When the inner cylinder 4 is rotated together with the construction key CK in this state, the locking bar 15 is
The other end (the left end in FIG. 1) is pushed toward the center of the inner cylinder. At this time, the release tumbler 21-
The unlocking notches 23 of the two outer tumblers including R are aligned with the inner edge of the locking bar 15, and the inner edge of the locking bar facing the resting tumblers 21-S and 21-S has a conski groove 25 (no. 1) is formed, so the locking bar 1
There is nothing that prevents the swinging of the inner cylinder 5, so the inner cylinder can rotate by a predetermined angle. In other words, it can be locked and unlocked using the construction key CK.

If another construction key is inserted into the keyhole 14, the unlocking notch 23 of at least one of the two outer tumblers will not align with the locking bar 15, so the locking bar 15 will pass 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 six 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 rotated using the duplicate key IK in this state, the cam groove 3 of the outer cylinder pushes the other end of the locking bar 15 (the left end in Fig. 1) toward the center of the inner cylinder, as described above. When the inner tube 4 is further rotated after the cam surface 24 contacts the outer edge of the release tumbler 21-R, the locking bar 15 is pushed inward by a wedge action. That is, the cam surface 24
The component force in the longitudinal direction of the locking bar of the reaction force received from the release tumbler 21-R is the locking bar 15.
along its longitudinal direction. Then, when the inner edge of the upper surface of the jetty 17 (on the right side in FIG. 1) moves relatively to the inclined inner surface of the locking groove 18,
Due to the wedge action that occurs between them, the locking bar 15 moves further inward, and finally, as shown in FIG. As a result, the outer edge of the locking bar 15 can come into contact with the cam groove 3 of the outer cylinder over its entire length. In this way, by the first unlocking operation using the duplicate key IK, the locking bar 15 moves inward by the width of the conkey groove 25, and the position after the movement is the same as the shape of the jetty 17 and the locking groove 18. engagement,
and is held elastically and stably by a compression coil spring 16.

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, the key shape of the construction key CK is different from that of the duplicate key IK (see FIG. 6), so the lock cannot be unlocked.

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 a special unlocking tool as described above, and the construction key device The release work 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 that the duplicate key will be copied 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.

In addition, although it is assumed that there are five idle tumblers, it is of course possible to have three or four tumblers.
In this case, the con key groove corresponding to the tumbler that is desired to operate as a tumbler even while the construction key device is in operation may be made shallower.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal 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 taken along the line of Fig. 1, and Fig. 3 is a plane view of the partition plate. 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 similar to FIG. 1 showing the released state of the construction key device. FIG. 1... Outer cylinder, 3... Cam groove, 4... Inner cylinder, 7...
...Partition plate, 8, 9...Retainer, 11...Spindle,
12...Backup pin, 14...Keyhole, 15
...Rotsking bar, 16...Compression coil spring,
17... Jetty, 18... Locking groove, 19... Slot, 21... Tumbler, 21-R... Release tumbler, 21-S... Stop tumbler, 23...
Unlock notch, 24...cam surface, 25...con key groove, CK...construction key, IK...duplicate key, g...key groove.

Claims (1)

[Scope of Claims] 1. An outer cylinder in which a cam groove is formed along the generatrix of the inner peripheral surface, and a plurality of partitions that are rotatably fitted into the outer cylinder and stacked in the central axis direction with gaps between them. an inner cylinder having a key hole passed through it along the central axis; an inner cylinder extending along the generatrix of the inner cylinder; and being guided movably in the radial direction on the outer periphery of the inner cylinder; It has a locking bar whose outer edge that engages with the cam groove is biased in the direction of protruding outward, and is provided in each slot between the partition plates with a generally C-shaped overall shape and one end that is swingable. The outer edge of the free end is pivoted 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. A tumbler with an unlocking notch that receives the inner edge of the locking bar is inserted into the locking bar, and when each of these tumblers engages with a corresponding groove of a duplicate key inserted into the keyhole, the unlocking notch of each tumbler will open. In a device that is aligned with the inner edge of the locking bar, a jetty is formed at one end of the cam groove, and when the construction key device is in operation, this jetty pushes up one end of the locking bar in the direction of the inner cylinder center axis, thereby locking the locking bar. In addition, the locking bar is made shorter than the cam groove so that the locking bar can move in the longitudinal direction, and a locking groove for receiving the jetty is formed on the outer edge of the locking bar near the contact portion with the jetty. On the other hand, at least one tumbler facing the other end of the locking bar is designated as a release tumbler for releasing the construction key device, and a cam surface inclined in the longitudinal direction is formed on the inner edge of the locking bar facing the release tumbler. On the other hand, at least one of the tumblers in the tumbler group excluding the release tumbler is designated as a resting tumbler, and a conski groove for receiving the automatic edge of the resting tumbler is formed on the inner edge of the locking bar facing the resting tumbler. This makes it possible to use a construction key specifically designed for construction work, which has a notch on the side edge of the part that faces the resting tumbler when inserted into the keyhole, and at the same time prevents the resting tumbler and the conski groove caused by the pushing up of the locking bar by the above-mentioned jetty. A lever tumbler lock with a construction key device, characterized in that the locking bar is prevented from moving in the longitudinal direction by engagement with the locking bar. 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.