JP2002339602A - Combination cylinder lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combination cylinder lock capable of preventing so-called picking. SOLUTION: An inner cylinder 2 of a pin cylinder lock is divided into two by a division face 8 vertical to a keyhole 3, and each of divided inner cylinders is provided with at least a set of tumbler pin and driver pin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite cylinder lock, and more particularly, to a novel composite cylinder lock capable of preventing so-called picking.

[0002]

2. Description of the Related Art It is well known that a cylinder lock can be unlocked relatively easily without a proper key by an illegal unlocking operation called so-called picking. Needless to say, there is a problem.

In the picking, a thin instrument is inserted into a keyhole of a cylinder lock, a tumbler exposed in the keyhole is moved, and a proper position of the tumbler is detected by applying a torque to the inner cylinder.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a novel composite cylinder lock which makes the above-mentioned picking operation impossible, thereby improving the safety of the cylinder lock.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, there is provided an outer cylinder, and a keyhole is formed in the outer cylinder in a rotatable manner by being rotatably fitted to the outer cylinder. A plurality of tumbler holes penetrating the outer cylinder and the inner cylinder in the radial direction and communicating with the keyhole, and a tumbler pin and a driver pin urged inward in each tumbler hole. Slidably housed so that the outer end surface of the tumbler pin that comes into contact with the driver pin when the duplicate key is inserted into the keyhole is aligned with the shear line. And each of the divided inner cylinders has at least one set of tumbler pins and driver pins.

According to a second aspect of the present invention, there is provided an outer cylinder having a tumbler locking groove formed on an inner peripheral surface along a generatrix, rotatably fitted to the outer cylinder, and rotating at a predetermined interval. A plurality of partition members laminated in the axial direction are provided, and an inner cylinder having a keyhole penetrated along the axis of rotation is provided.Each slot formed between the partition members of the inner cylinder has a respective slot. A tumbler is slidably guided in the width direction of the duplicate key inserted into the keyhole and urged in a direction engaging with the tumbler locking groove, and the keyhole is provided at the center of each tumbler. Open the keyholes of a size that can surround the
In the one in which the opening edge of the key hole and the key groove of the duplicate key inserted into the key hole are engaged so that the edge of each tumbler is aligned with the shear line, the inner end of the outer cylinder has an inner end. A short cylinder having the same keyhole as the cylinder is rotatably housed independently of the inner cylinder, and at least one tumbler hole penetrating the outer cylinder and the short cylinder in the radial direction and communicating with the keyhole is formed. A set of a tumbler pin and a driver pin urged inward is slidably housed in this tumbler hole, and the outer end face of the tumbler pin that comes into contact with the driver pin when the duplicate key is inserted into the key hole is sheared. It is characterized by being aligned with the line.

Further, according to a third aspect of the present invention, there is provided an outer cylinder having a cam groove formed along a generatrix of an inner peripheral surface, rotatably fitted to the outer cylinder, and having a rotation axis line interposed therebetween. A plurality of partition plates laminated in the direction are provided, and an inner cylinder having a keyhole penetrated along the rotation axis, and extends along a generatrix of the inner cylinder, and radially extends at an outer peripheral portion of the inner cylinder. A locking bar that is movably guided and has an outer edge that engages with the cam groove and is urged in a direction to protrude outward; and each slot between the partition plates has a substantially entire shape. One end of the key is pivotally supported in a swingable manner, and is urged in a direction that interferes with a side edge of a key inserted into the keyhole, and is normally engaged with a backup pin that penetrates the inner cylinder in the axial direction. Forming an unlocking notch that is stopped and receives the inner edge of the locking bar at the free end outer edge. A lever tumbler was inserted so that when each of these tumblers was engaged with the corresponding keyway of the duplicate key inserted through the keyhole, the unlocking notch of each tumbler was aligned with the inner edge of the locking bar. A short cylinder having the same keyhole as the inner cylinder at the inner end of the outer cylinder is rotatably housed independently of the inner cylinder, and the outer cylinder and the short cylinder are penetrated in the radial direction to form a keyhole. A tumbler hole communicating with the keyhole is formed, and a set of a tumbler pin and a driver pin urged inward are slidably housed in the tumbler hole. The outer end surface of the tumbler pin abutting on the pin is aligned with the shear line.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1 showing an embodiment of the present invention, reference numeral 1 denotes an outer cylinder, reference numeral 2 denotes an inner cylinder, and the inner cylinder 2 is rotatably fitted to the outer cylinder 1. .

A keyhole 3 is formed in the inner cylinder 2 along the direction of the rotation axis thereof.
Tumbler hole 4 penetrating radially through and communicating with keyhole 3
Are formed.

A set of a tumbler pin 5 and a driver pin 6 urged inward is slidably housed in each tumbler hole 4, and a duplicate key 7 is inserted into the key hole 3, and a duplicate key 7 is inserted. When the tumbler pin 5 corresponding to the key groove formed on the side edge of the tumbler engages, the outer end surface of the tumbler pin 6 that contacts the driver pin is aligned with the shear line.

By the way, the cylinder lock having the above configuration is
It is referred to as a so-called pin tumbler lock, and its configuration is conventionally well known.

According to the first aspect of the present invention, the inner cylinder 2 is divided into a plurality of pieces (two pieces by the dividing surface 8 in the illustrated embodiment) in the rotation axis direction, and each of the divided inner cylinders is At least one set of tumbler pins 5 and driver pins 6 is provided.

In the illustrated embodiment, the innermost (leftmost in FIG. 1) inner cylinder is provided with a set of tumbler pins 5 and driver pins 6 and is separated from the outer inner cylinder.

In the illustrated embodiment, locking pins 9 are driven into the outer cylinder 1 so that the inner ends engage with grooves formed on the outer peripheral surface of the inner cylinder 2. 9 and 9 prevent the inner cylinder from coming off.

In FIG. 1, reference numeral 11 denotes a tailpiece, and this tailpiece 11 is assumed to be driven into a keyhole of an inner cylinder.

The composite cylinder lock according to the first embodiment of the present invention having the above-described structure, when the duplicate key 7 is not inserted into the keyhole, the respective tumbler holes 4
The driver pin 6 inside the
Has moved inward from the position shown in FIG. 1 (not shown),
Because it straddles the shear line, it is locked.

On the other hand, when the duplicate key 7 is inserted into the keyhole 3, as shown in FIG. 1, the composite cylinder lock is unlocked, and the divided inner cylinder groups are integrally connected by the duplicate key 7 to lock. Alternatively, an unlocking operation can be performed.

In other words, this composite cylinder lock has the same operation and function as the conventional pin cylinder lock in appearance.

However, in so-called picking in which unauthorized unlocking is performed without using the duplicate key 7, even if the driver pins 6, 6 of the outer inner cylinder are aligned on the shear line, the driver pins of the inner inner cylinder are unlocked. Picking ends up failing because the lock position cannot be known.

In picking, it is necessary to insert a thin tool into the keyhole 3 of the inner cylinder to operate the tumbler pin 5 and apply a torque to the inner cylinder to detect the answer. This is because a combined cylinder lock cannot apply torque to the inner cylinder.

FIG. 2 shows a composite cylinder lock according to an embodiment of the present invention. In this embodiment, the present invention is applied to a so-called disk cylinder lock.

In FIG. 2, reference numeral 1 denotes an outer cylinder of the disk cylinder lock, and reference numeral 2 denotes an inner cylinder thereof. As shown in FIG. A pair of tumbler locking grooves 12, 12 are formed.

The inner cylinder 2 rotatably fitted to the outer cylinder is provided with a plurality of partition members 13, 13 which are stacked at predetermined intervals in the direction of the rotation axis, and extends along the rotation axis. Key hole 3 penetrates.

Each slot 14 formed between the partition members 13 of the inner cylinder is slidable in the width direction (left and right directions in FIG. 3) of the duplicate key 7 inserted into the key hole 3. A tumbler 15 that is guided and urged in a direction that engages with the tumbler locking groove is inserted.

At the center of each tumbler 15, a key-through hole 16 large enough to surround the key hole 3 is opened at a different position, and a tumbler spring 10 as a compression coil spring is provided. Urged in the radial direction of the inner cylinder.

In the disk tumbler lock, the opening edge of the key hole 16 and the key groove of the duplicate key 7 inserted into the key hole are engaged so that the edge of each tumbler is aligned with the shear line. ing.

On the other hand, as shown in FIG. 2, a short cylinder 17 having the same keyhole (not shown) formed along the rotation axis as the inner cylinder 2 is provided at the inner end of the outer cylinder 1. Are rotatably housed independently.

The outer cylinder and the short cylinder 17 are formed with at least one (two in the illustrated embodiment) stepped tumbler holes 4 penetrating them radially and communicating with the keyhole. I have.

In the tumbler hole 4, a set of a stepped tumbler pin 5 and a driver pin 6 urged inward is slidably housed, and as shown in FIG. The outer end surface of the tumbler pin 5 that comes into contact with the driver pin 6 when the 7 is inserted is aligned with the shear line.

That is, the configuration of the short cylinder 17 is substantially the same as that of the inner cylinder of the conventional pin tumbler lock.

In the illustrated embodiment, the tumbler pin 5 is guided so as to be movable in the vertical direction in FIG. 2, in other words, in the thickness direction of the tip portion of the duplicate key, and correspondingly, as shown in FIG. Depressions 18, 18 are formed in the tip portion of the duplicate key 7 in the plate thickness direction, and the amount of movement of the tumbler pin 5 is set according to the degree of engagement with the depression 18.

In this case, in order to prevent the tip of the duplicate key and the inner end of the tumbler pin 5 from interfering with each other, as shown in FIG. Yes.

In the illustrated embodiment, the tumbler pin 5
2 moves in the up and down direction in FIG. 2, but this can be configured to move in the paper surface direction. In this case, the key is attached to the leading end side edge of the duplicate key like a normal disk tumbler lock. A groove is formed (not shown).

In any case, the depth of the keyway or the depression 1
By changing the depth of step 8 in steps, the key difference can be increased even in this short cylindrical portion.

In FIG. 2, the same reference numerals as those in FIG. 1 denote equivalent members.

In the composite cylinder lock according to the second aspect of the present invention, when the duplicate key 7 is not inserted into the keyhole, any one of the end portions of the entire disk tumbler is provided in the inner cylinder 2 portion. Are engaged with the tumbler locking groove 12, and the tumbler pin 5
Is engaged with the recess 18 so that the composite cylinder lock is locked.

On the other hand, when the duplicate key 7 is inserted into the keyhole,
As shown in FIGS. 2 and 3, all the disk tumblers and tumbler pins move to the unlocking position, so that the inner cylinder 2 and the short cylinder 17 integrally connected via the duplicate key 7 are locked or unlocked respectively. This is the same as the composite cylinder lock according to the first aspect of the present invention.

On the other hand, when the duplicate key is not inserted into the keyhole, the torque applied to the inner cylinder 2 is not transmitted to the short cylinder 17 during picking, as described above, so that the short cylinder 17 as a pin tumbler lock is used. Can not pick,
Therefore, since the tail piece 11 integral with the short cylinder 17 cannot be moved, the composite cylinder lock cannot be picked.

The present invention is also applicable to a so-called lever tumbler lock. In this case, the lever tumbler lock may be replaced with the disk tumbler lock shown in FIG.

As shown in FIG. 6, the lever tumbler lock includes an outer cylinder 1 having a cam groove 21 formed along a generatrix on an inner peripheral surface, and an inner cylinder 2 rotatably fitted to the outer cylinder 1. And

The inner cylinder 2 is provided with a plurality of partition plates 22, 22 stacked in the direction of the rotation axis via a gap, and the keyhole 3 is penetrated along the rotation axis.

The outer peripheral portion of the inner cylinder extends along the generating line, is guided so as to be movable in the radial direction, and is biased in a direction in which an outer edge engaging with the cam groove projects outward. Locking bar 23 is mounted.

Each of the slots 14 between the partition plates 22 and 22 has a substantially C-shaped overall shape, one end of which is pivotally supported at one end, and a side end of a key inserted through a keyhole. A lever tumbler 25 that is urged in a direction that interferes with the edge and that is normally engaged with a backup pin 24 that penetrates the inner cylinder in the axial direction is inserted.

An unlocking notch 26 for receiving the inner edge of the locking bar 23 is formed at the outer edge of the free end of the lever tumbler 25. Each of the tumblers is inserted into a keyhole 7 through a keyhole. Of each tumbler when the corresponding keyway of the locking bar 2
3 with the inner edge.

In the lever tumbler lock, when the inner cylinder 2 rotates relative to the outer cylinder 1, the locking bar is moved in the rotation axis direction of the inner cylinder by a wedge action generated between the cam groove 21 and the outer edge of the locking bar 23. However, the lever tumbler 25 prevents the movement of the locking bar in the locked state.

However, when the unlocking notch 26 of the lever tumbler 25 is aligned with the inner edge of the locking bar, the locking bar can be moved, that is, the locking bar is unlocked.

Other constructions and operational effects of the composite cylinder lock according to the third aspect of the invention are the same as those according to the second aspect of the present invention shown in FIG.

[0048]

As is apparent from the above description, according to the present invention, the cylinder forming a part of the inner cylinder of the pin tumbler lock is independently rotatably inserted into the inner end of the outer cylinder, and Since a keyway and a dent are formed at the tip to unlock it, the normal locking and unlocking operation using a duplicate key can be performed in the same way as a normal cylinder lock, while applying torque to the inner cylinder for picking As a structure that can be shut off, there is an expected effect that the security of the cylinder lock can be improved by making it virtually impossible to pick.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a composite cylinder lock according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a composite cylinder lock according to an embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional view of the disk tumbler lock.

FIG. 4 is a plan view of a duplicate key of the disk tumbler lock.

FIG. 5 is an enlarged plan view of the tip.

FIG. 6 is an enlarged cross-sectional view of the lever tumbler lock.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer cylinder 2 Inner cylinder 3 Keyhole 4 Tumbler hole 5 Tumbler pin 6 Driver pin 7 Duplicate key 8 Dividing surface 9 Locking pin 11 Tailpiece 17 Short cylinder 18 Depression 19 Incline

Claims (3)

[Claims] 1. An outer cylinder and an inner cylinder rotatably fitted to the outer cylinder and having a keyhole formed in a rotation axis direction, and a key is inserted through the outer cylinder and the inner cylinder in a radial direction. A plurality of tumbler holes communicating with the holes are formed, and a set of a tumbler pin and a driver pin urged inward are slidably housed in each tumbler hole, and a driver is inserted when a duplicate key is inserted into the key hole. An inner cylinder is divided into a plurality of pieces in an axial direction of the tumbler pin so that an outer end surface of the tumbler pin abuts on the pin is aligned with the shear line. A composite cylinder lock characterized by comprising: 2. An outer cylinder having a tumbler locking groove formed on an inner peripheral surface thereof along a generatrix, and a plurality of partitions which are rotatably fitted to the outer cylinder and are laminated at predetermined intervals in a direction of a rotation axis. A member is provided, and the inner cylinder has a keyhole penetrated along the rotation axis. Each slot formed between the partition members of the inner cylinder has a width of a master key inserted into the keyhole. A tumbler that is guided so as to be slidable in the direction and is urged in a direction engaging with the tumbler locking groove is inserted, and a key hole of a size that can surround the key hole is provided at the center of each tumbler. The holes are opened at different positions, and the opening edge of the key hole is engaged with the keyway of the duplicate key inserted into the keyhole so that the edge of each tumbler is aligned with the shear line. At the inner end of the outer cylinder, a short cylinder with the same keyhole as the inner cylinder is rotated independently of the inner cylinder At least one tumbler hole which penetrates the outer cylinder and the short cylinder in the radial direction and communicates with the keyhole, and the tumbler pin and the driver pin which are biased inward are formed in the tumbler hole. A composite cylinder lock in which a set is slidably housed so that the outer end surface of a tumbler pin that contacts a driver pin when a duplicate key is inserted into a keyhole is aligned with a shear line. 3. An outer cylinder having a cam groove formed along a generatrix on an inner peripheral surface, and a plurality of partition plates which are rotatably fitted to the outer cylinder and stacked in the direction of the rotation axis via a gap. Along with
An inner cylinder having a keyhole penetrating along the rotation axis, and extending along the generatrix of the inner cylinder, being guided in the outer peripheral portion of the inner cylinder so as to be movable in a radial direction and engaging with the cam groove. A locking bar urged in a direction in which an outer edge to be fitted outwardly projects, and each slot between the partition plates has a substantially C-shaped overall shape, and one end is pivotally supported at one end. , Is urged in a direction that interferes with the side edge of the key inserted into the keyhole, and is normally locked by a backup pin that penetrates the inner cylinder in the axial direction, and has a locking bar at the outer edge of the free end. A lever tumbler formed with an unlock notch for receiving the inner edge of the tumbler is inserted, and when each of these tumblers is engaged with the corresponding keyway of the duplicate key inserted into the keyhole, the unlock notch of each tumbler is Smell aligned with inner edge of locking bar A short cylinder having the same keyhole as the inner cylinder at the inner end of the outer cylinder is rotatably housed independently of the inner cylinder, and penetrates the outer cylinder and this short cylinder in the radial direction to communicate with the keyhole. At least one tumbler hole to be formed is formed, and a set of a tumbler pin and a driver pin urged inward are slidably housed in the tumbler hole. A composite cylinder lock characterized in that the outer end surface of the tumbler pin that abuts is aligned with the shear line.