JP2594927Y2 - Cylinder lock - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention has a latch bolt having a main tightening function and a deadbolt which is locked by a thumb-turn from the indoor side, and when locked by a thumb-turn from the indoor side, depending on a normal duplicate key. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder lock that cannot be unlocked from the outdoor side and has a function that can be unlocked from the outdoor side with a special key in an emergency.

[0002]

2. Description of the Related Art A lock provided with a dead bolt which has a latch bolt having a main tightening function and which is unlocked and unlocked from the outdoor side with a double key, and which is unlocked and unlocked only from the indoor side by a thumb turn, has a security performance. It is used in guest rooms of hotels because of its high cost.

However, in a hotel room or the like equipped with such a lock, if a guest on the indoor side cannot move due to, for example, sudden illness after locking the deadbolt, it cannot be rescued from the outdoor side.

In order to prepare for such a case, such a lock is usually provided with a function of unlocking the deadbolt from the outdoor side with an emergency key in an emergency.

[0005] As an example of an arrangement in which a deadbolt locked by a thumb turn can be unlocked with an emergency key in an emergency, there is one disclosed in Japanese Utility Model Publication No. 52-42860.

[0006] The door lock disclosed in the publication has a latch bolt and a dead bolt which constantly apply resilience in the protruding direction. In the door lock, which is unlocked from the outdoor side via a cylinder, the operating rod, which always provides a resilient force in the protruding direction inside the thumb turn shaft, is slidable and non-rotatable. On the other hand, an operating rod for unlocking the cylinder is provided so as to be slidable, and when the normal key is used, the operating rod and the operating rod are opposed to each other so that the operating rod is pressed and retracted via the operating rod and then unlocked. The operating rod has a stepped groove formed such that when the thumb turn is rotated in the locking direction, a stop pin penetrating the thumb turn shaft abuts on the step to prevent the operating rod from retreating.

However, in many Japanese locks including this cylinder lock, the central axis of the inner cylinder of the cylinder lock and the central axis of the thumb turn are on the same axis.

On the other hand, in recent years, foreign construction companies have entered the Japanese market, and there is a case where a building constructed by those companies is required to use a cylinder lock which is a foreign standard.
In many of the locks, the central axes of the inner cylinder and the thumb turn are not the same axis but different axes.

For an off-axis cylinder lock in which the inner cylinder and the central axis of the thumb turn are on different axes, Japanese Utility Model Publication No.
The dead-bolt unlocking mechanism in an emergency in a conventional coaxial cylinder lock in which the central axis of the inner cylinder and the thumb turn include the same axis, including the one disclosed in Japanese Patent No. 2-42860, is not applicable.

[0010]

The object of the present invention is to provide a mechanism for unlocking a dead bolt in an emergency, which can be applied to an off-axis type cylinder lock in which the center axes of the inner cylinder and the thumb turn are on different axes. Aim.

[0011]

In order to achieve the above-mentioned object, a cylinder lock according to the present invention is provided with an inner cylinder having a keyhole in an axial direction inside an outer cylinder. A cam or other operating member is attached to the inner cylinder in order to lock and unlock the latch bolt that performs both empty tightening and final tightening by turning the angle, and to lock and unlock the dead bolt operated by the thumb turn by turning the inner cylinder by a large angle. Is fixedly provided, at the rear of the inner cylinder, a control piece operated by a normal key or an emergency key can be biased toward the front side of the inner cylinder and displaced in the axial direction of the inner cylinder, and together with the inner cylinder It is mounted so that it can rotate, and its control piece selectively abuts a stopper fixed to the outer cylinder when the inner cylinder rotates at the rear position or the front position of the axial displacement, and The rotation angle is limited.

[0012]

The unlocking when both the latch bolt and the dead bolt are locked will be described.

When a normal key, either a child key or a master key, which is normally used, is inserted into the keyhole of the inner cylinder, as shown in FIG. Is pressed against the forward bias of the inner cylinder and moves rearward.

Next, when the control piece is rotated by a normal key together with the inner cylinder in the direction of arrow A in FIG. 3 by a predetermined angle (135 degrees in the figure), a part of the control piece (for example, the longer arm) is brought into contact with the stopper. And stop.

During this time, the inner cylinder is rotated by a small angle,
While the latch bolt is unlocked by the operating member that rotates together, the dead bolt that is unlocked via the operating member by the large-angle rotation of the inner cylinder still remains in the locked state. That is, the deadbolt operated by the thumb turn cannot be unlocked depending on the ordinary key.

For example, in the case where a customer falls down in a hotel room with a dead bolt locked by a thumb turn or an abnormal situation occurs in the room, the door is opened with an emergency key separately prepared on the hotel side. .

When the emergency key is inserted into the keyhole of the inner cylinder, FIG.
As shown in (2), for example, the presence of the groove provided at the key tip causes the pressing projection of the control piece to escape, and the control piece is not pressed and maintains the initial position.

Here, when the operating member is rotated together with the inner cylinder by turning the key, the control piece does not come into contact with the stopper, and the inner cylinder rotates at a large angle exceeding, for example, 135 degrees. Then, the working member that rotates together with the inner cylinder unlocks the dead bolt with the first 360-degree rotation, and unlocks the latch bolt with the further 135-degree rotation.

Therefore, even if an emergency condition occurs in a room such as a hotel, the door can be opened using the emergency key stored at the hotel or the like.

In order to lock the deadbolt, the inner cylinder may be rotated by using a normal key or an emergency key in the opposite direction.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cylinder lock according to the present invention will be described below with reference to an embodiment shown in the drawings. Although the drawing shows an example in which the present invention is applied to a rotary disk tumbler lock, the present invention applies to a slide type disk tumbler lock, a pin tumbler lock, or a magnetic type pin tumbler lock and other cylinder locks. Can also be implemented.

Each member constituting the present invention is usually made of brass, steel, stainless steel or other metal material, but may be made of a tough hard synthetic resin material or the like.

1 to 5, reference numeral 1 denotes an outer cylinder attached to the lock case, 11 denotes a pressing plate for the inner cylinder 2, 12 denotes a stopper frame for restraining the pressing plate 11 against the outer cylinder 1, and 13 denotes a front plate. , 14 indicate flange bodies, respectively.

Reference numeral 2 denotes an inner cylinder rotatably fitted to the outer cylinder 1,
Reference numeral 21 denotes a front piece that forms part of the inner cylinder 2, 22 denotes a rear piece that also forms part of the inner cylinder 2, 23 denotes a plurality of disk tumblers incorporated in the inner cylinder 2, 24 denotes a partition plate, and 25 denotes a partition plate. The rotation shaft of the disk tumbler 23, 26 is a backup pin, 27 is a keyhole provided in the axial direction of the inner cylinder 2 from the front piece 21 to the rear piece 22 of the inner cylinder 2, 3 is compressed toward the outer cylinder 1 A locking bar 5 urged by a spring 4 to selectively lock between the outer cylinder 1 and the inner cylinder 2 is fixed to a rear piece 22 of the inner cylinder 2 with a screw 50 or a pin or the like, and has a predetermined locking mechanism. A cam and other action members for operating (not shown) and 51 are spacers, respectively.

The disk tumbler lock having the above-described configuration is well known in the art. In the present invention, the operating member 5 locks and unlocks a latch bolt (not shown) that performs both empty tightening and final tightening by rotating the inner cylinder 2 at a small angle, and rotates the inner cylinder 2 at a large angle. Normally, a deadbolt (not shown) operated only by the thumb turn is unlocked. In addition, the interlocking mechanism for associating the latch bolt and the dead bolt with the action member 5 is not shown.

The rear portion of the inner cylinder 2, that is, the rear piece 22, has a groove 28 dug from the rear surface side, and the control piece 6 is mounted in the groove 28. The control piece 6 can be displaced in the groove 28 in the axial direction of the inner cylinder 2, and is biased toward the front side of the inner cylinder 2 by a compression spring 7 or a magnetic force.
The control piece 6 can rotate together with the inner cylinder 2.

On the front side of the control piece 6, there is provided a projecting piece 61 projecting into the keyhole 27 of the inner cylinder rear part 22, and between the rear side of the control piece 6 and the action member 5, A compression spring 7 is provided.

As shown in FIGS. 2 and 5, the control piece 6
By using a normal key 91 (either a child key or a master key) or an emergency key 92, it is possible to take either the rear position or the front position of the axial displacement with respect to the inner cylinder 2.

When the inner cylinder 2 and the control piece 6 are rotated by a normal key 91 from the position shown in FIG. 3 to the position shown in FIG. 4 in the direction of arrow A by a predetermined angle (135 degrees in the figure), the length of the rod-shaped control piece 6 becomes longer. One arm 62 abuts against a stopper 8 fixed to the rear surface of the outer cylinder 1 with a screw 80.

At this time, the inner cylinder 2 is rotated by a small angle,
The latch bolt (not shown) is unlocked by an action member 5 which rotates together through an appropriate interlocking mechanism (not shown). For example, the latch bolt is unlocked by a large angle rotation of the inner cylinder 2 exceeding 135 degrees. The deadbolt remains locked.

On the other hand, when the emergency key 92 is used, as shown in FIG. 5, for example, the escape groove 90 provided at the key tip escapes the projecting piece 61 of the control piece 6, in other words, the escape groove Since 90 fits into the protruding piece 61 of the control piece 6, the control piece 6 keeps its original front position.

Here, the inner cylinder 2 and the control piece 6 are
When the operation member 5 is rotated, the control piece 6 does not come into contact with the stopper 8 and the rotation of the inner cylinder 2 and the operation member 5 at a large angle is allowed. A dead bolt (not shown) on an axis different from the axis is to be unlocked via a suitable interlocking mechanism (not shown).

In the illustrated example, since the control piece 6 is selectively displaced in the axial direction of the inner cylinder 2, the normal key 91 without a groove is used.
And the grooved emergency key 92 is used, but the selective displacement of the control piece 6 is similarly performed by a set of keys in which the key tip of the normal key is simply made longer and the key tip of the emergency key is made shorter. Action can be performed.

By changing the mounting position of the stopper 8, the abutting position of the control piece 6 with the stopper 8 is changed to the forward position in the axial direction of the cylinder 2, contrary to the illustrated example. It is also possible to change the non-interference position with respect to 8 to the rear position.

[0035]

[Effects of the Invention] This invention described above can be applied to an off-axis cylinder lock in which the center axis of the inner cylinder and the center axis of the thumb turn are on different axes, regardless of the simple structure. It is effective in providing an excellent unlocking mechanism for dead bolts in an emergency.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a main part of an embodiment of a cylinder lock of the present invention.

FIG. 2 is a vertical sectional side view showing a state in which a normal key is inserted.

FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 2;

FIG. 4 shows a state I in FIG. 2 in a state where a normal key is rotated.
FIG. 4 is a transverse cross-sectional view taken along a plane corresponding to line V-IV.

FIG. 5 is a longitudinal sectional partial side view showing a state where an emergency key is inserted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer cylinder 2 Inner cylinder 26 Keyhole 5 Working member 6 Control piece

Claims (1)

(57) [Scope of request for utility model registration] 1. A cylinder lock comprising an inner cylinder having a keyhole in an axial direction inside an outer cylinder, wherein a small angle of rotation of the inner cylinder unlocks and unlocks a latch bolt serving both empty tightening and final tightening. A cam or other working member is fixedly provided on the inner cylinder in order to lock and unlock the deadbolt operated by the thumb turn by turning the inner cylinder at a large angle, and a normal key or an emergency key is provided at a rear portion of the inner cylinder. Is mounted so that it can be displaced in the axial direction of the inner cylinder and can rotate with the inner cylinder by biasing the control piece toward the front side of the inner cylinder, and the control piece is located at the rear position of the axial displacement. Alternatively, a cylinder lock characterized in that when the inner cylinder rotates in a forward position, the stopper locks selectively on a stopper fixedly provided on the outer cylinder to limit the rotation angle of the inner cylinder.