JP2005282049A - Cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylinder lock which is locked against the will of an outsider when the outsider inserts a slim tool into a keyhole thereof to move a tumbler. <P>SOLUTION: The cylinder lock 1 includes an outer cylinder 2 and an inner cylinder 3 rotatably inserted in the same. The inner cylinder 3 has the keyhole 5 axially formed therein, and a tumbler hole 6 formed therein, in which tumbler pins 8 are slidably housed. Further the inner cylinder has a cylinder hole 9 formed therein on one side of the tumbler pins 8 closer to a duplicate key insertion side, and sets of a cylinder pin 11 and a driver pin 12 energized toward the keyhole are slidably housed in the cylinder hole. The cylinder pin 11 moves in the same direction as that of the tumbler pins 8, and when the tip of each cylinder pin 11 is located near the center of the keyhole, an external end face of the cylinder pin 11 is aligned with a shear line 13. Thus if the outsider moves the cylinder pin 11 to form a space for picking operation, the external end face of the cylinder pin 11 exceeds the shear line 13, and therefore the inner cylinder 3 is locked. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a novel cylinder lock that can effectively prevent unlocking by picking.

  Many cylinder locks for preventing picking have been proposed as crime prevention measures against crimes by unlocking a locked lock using a tool such as a pick for picking. For picking, insert a thin wire-like instrument into the keyhole of the cylinder lock, move the rod-like or plate-like tumbler that is the keyhole protruding member exposed in the keyhole, and apply torque to the inner cylinder to ensure proper tumbler This is an act of detecting the position and enabling the inner cylinder to rotate without a key.

For example, the following conventional cylinder locks have been taken as countermeasures that complicate the tumbler moving mechanism and make picking difficult.
Japanese Patent Application Laid-Open No. 61-1555577 JP-A-2-248586 JP2003-293628A

  However, even if a conventional cylinder lock is a pin tumbler lock or a disk tumbler lock, the operation direction of a pin or a disk which is a keyhole protruding member with a countermeasure against picking is the same as that of other normal pins or disks. For this reason, there is a risk of unlocking if a pick is inserted.

  The present invention has been made to solve the above-described problems of the conventional cylinder lock, and conversely, if a thin instrument is inserted into the keyhole of the cylinder lock and the tumbler of the pin or disk is moved. An object of the present invention is to provide a cylinder lock that is locked.

  In order to solve the above-described problems, a cylinder lock according to the present invention includes an outer cylinder, an inner cylinder that is rotatably inserted into the outer cylinder and forms a key hole in the axial direction, and an elastic member that is attached to the key hole. A plurality of keyhole projecting members projecting movably, and a cylinder lock that locks or unlocks the inner cylinder with respect to the outer cylinder by allowing the keyhole projecting member to move. A cylinder hole that penetrates the outer cylinder and the inner cylinder in the radial direction and communicates with the key hole in the same direction as the key hole protruding member moving direction is formed on the key insertion side of the key hole protruding member. The cylinder pin and driver pin that are urged in the direction are slidably stored, and when the tip of the cylinder pin is located near the center of the keyhole, the outer end surface of the cylinder pin that contacts the driver pin is aligned with the shear line. To configure It is an butterfly.

  The cylinder lock may be a pin tumbler lock, a disc tumbler lock, or a lever tumbler lock. In the case of a pin tumbler lock, a plurality of tumbler holes that penetrate the outer cylinder and the inner cylinder in the radial direction and communicate with the key hole are formed, and tumbler pins and driver pins that are urged inward are formed in each tumbler hole. And the outer end surface of the tumbler pin that comes into contact with the driver pin when the key is inserted into the key hole is aligned with the shear line.

  The cylinder pins are located on the same front side of these tumbler pins, and when the key is not inserted, the tip of the cylinder pin is near the center of the keyhole.At this point, the outer end face is aligned with the shear line. The inner cylinder part near the pin is in a rotatable state. However, when the key is not inserted, the dividing boundary line between each pair of tumbler pins and driver pins does not coincide with the shear line, and therefore the inner cylinder cannot rotate in this state.

  When the key is inserted, the outer end surface of the tumbler pin is aligned with the shear line, and at the same time, the outer end surface of the cylinder pin remains in the shear line, so that all inner cylinders are released and unlocked.

  When picking the cylinder lock, it is necessary to move the tumbler pin by pushing it up while inserting a pick and applying torque to the inner cylinder. Since it protrudes and closes the keyhole, it is impossible to avoid this and insert a pick. Further, when the cylinder pin is moved to form a space for picking operation, the inner cylinder is locked because the outer end surface of the cylinder pin exceeds the shear line.

  In the case of a disk tumbler lock, an inner cylinder is rotatably fitted in an outer cylinder having a plurality of tumbler locking grooves formed on the inner surface, and a plurality of disks having key holes are axially arranged in the inner cylinder. Are laminated while maintaining a predetermined interval. These discs are guided so as to be slidable in the width direction of the joint key inserted through the key hole, and are urged in a direction to be engaged with the tumbler locking groove by an attached elastic member.

  Therefore, the rotation of the inner cylinder with respect to the outer cylinder is prevented because the end of the disk is positioned outside the shear line before inserting the key. When the key is inserted, the crests and troughs of the keys engage with the inner surface of the keyhole of each disc to move the disc against the elastic member, so the end of the disc separates from the tumbler locking groove and moves into the inner cylinder. You are released from the lock to immerse yourself.

  Even in the case of a disc tumbler lock, the cylinder pin is located on the same front side of these discs. At the time of inserting the key, the disc is inserted into the inner cylinder and at the same time the cylinder pin is configured such that the outer end surface thereof remains in the shear line, so that all the inner cylinders are released and unlocked. In this case as well, when the pick is inserted and the disc is moved, the outer end surface of the cylinder pin exceeds the shear line, so that the inner cylinder is locked.

  The keyhole protruding member may indirectly lock the inner cylinder as it moves. For example, a vertical pin that is pressed by a spring-operated driver is accommodated in a hole that is commonly drilled in the outer cylinder and the inner cylinder, and a horizontal pin that is disposed perpendicular to the pin is biased by an elastic member. However, the structure which protrudes in a keyhole may be sufficient.

  In this case, the horizontal pin is provided with a reduced diameter portion so that the lower end of the vertical pin can be fitted into this portion. When the vertical pin is in contact with a portion other than the reduced diameter portion of the horizontal pin, the pin and the driver are pushed up, and the locked state is established. When the reduced diameter part of the horizontal pin moves so that it is positioned directly below the vertical pin, the pin and driver move down so that the boundary line between them coincides with the shear line and the inner cylinder rotates freely with respect to the outer cylinder. You can move.

  If the cylinder pin is positioned on the same line as the front surface of the horizontal pin, the picking is similarly prevented. In addition, the locking member inserted in the reduced diameter part of a horizontal pin is not limited to a pin, A board | plate material etc. may be sufficient. When the cylinder pin is moved from the initial position, a cylinder pin that protrudes into the key hole and moves in the same direction as the member that moves with the concave and convex portions of the key and that always has a tip located near the center of the key hole is provided. The pin tumbler lock of any structure, a disk tumbler lock, a tumbler lock composed of a pin and a disk, or a lever tumbler lock may be used as long as the lock is applied.

  In the cylinder lock of the present invention, a set of a cylinder pin and a driver pin that can move in the same direction as the keyhole protruding member moving direction is provided on the key insertion side of the keyhole protruding member, and the tip of the cylinder pin is positioned near the center of the keyhole. Since the outer end surface of the cylinder pin is aligned with the shear line when doing this, when performing the picking action on this cylinder lock, the cylinder pin protrudes to the front row on the side where the key is inserted and plugs the key hole Therefore, it is impossible to insert a pick avoiding this, and when trying to form a space for pick operation by moving the cylinder pin, the outer end surface of the cylinder pin exceeds the shear line, so the inner cylinder It will be locked.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a longitudinal sectional view of a cylinder lock, and FIGS. 2 and 3 are sectional views showing a II-II section or a III-III section of FIG. 1, respectively. The cylinder lock 1 includes an outer cylinder 2 and an inner cylinder 3 that is rotatably inserted into the outer cylinder 2, and a tail piece 4 protrudes from the rear end of the inner cylinder. A lock member (not shown) is operated via the key to lock or unlock.

  A key hole 5 is formed in the inner cylinder 3 in the axial direction, and a plurality of tumbler holes 6 communicating with the key hole 5 are formed. A tumbler urged in the key hole direction by a tumbler spring 7 in each tumbler hole 6. The pin 8 is slidably stored. The tumbler pin 8 is formed with a reduced diameter portion 8a, and in the locked state, the height of each reduced diameter portion 8a in the plurality of tumbler pins 8 is set at a different position.

  Cylinder holes 9 are formed in the tumbler pins 8 on the side where the key is inserted, and the outer cylinder 2 and the inner cylinder 3 are penetrated in the radial direction, and the cylinder pin 11 and the driver pin urged by the cylinder spring 10 in the key hole direction. Twelve sets are slidably stored. The cylinder pin 11 has the same moving direction as the tumbler pin 8, and the outer end surface of the cylinder pin 11 contacting the driver pin 12 is aligned with the shear line 13 when the tip of the cylinder pin 11 is located near the center of the keyhole. Configure.

  As shown in FIG. 3, a cam groove 14 is formed on the inner surface of the outer cylinder 2, and a locking bar 16 accommodated in the slot 15 of the inner cylinder 3 is engaged. The locking bar 16 is guided along the slot 15 so as to be movable in the radial direction of the inner cylinder 3. A locking spring 18 is fitted into a projection 17 provided on the side of the tumbler hole 6, and the locking bar 16 is pressed toward the cam groove 14 by its elastic force.

  The moving directions of the locking bar 16 and the tumbler pin 8 are orthogonal to each other, and the inner end portion 16 a of the locking bar 16 has a size that can be fitted into the reduced diameter portion 8 a of the tumbler pin 8. As shown in FIG. 3, when the inner end portion 16a of the locking bar 16 is in contact with a portion other than the reduced diameter portion 8a of the tumbler pin 8, the locking bar 16 cannot be moved, so that the inner cylinder 3 is locked. .

  Next, the operation of the cylinder lock when the key is inserted will be described with reference to FIGS. 4 is a longitudinal sectional view of the cylinder lock when the key is inserted, FIG. 5 is a sectional view showing a VV section of FIG. 4, and FIG. 6 is a sectional view showing a VV section during rotation. The key 19 is formed with a plurality of recesses 19a having different depths so that the tip portions of the cylinder pins 11 and the tumbler pins 8 are fitted into the recesses 19a.

  The outer end surface of the cylinder pin 11 is configured to remain on the shear line 13 even when the key is inserted. When the reduced diameter portion 8a of the tumbler pin 8 fitted in the recess 19a is aligned at the same height, the inner end portion 16a of the locking bar 16 comes to coincide with the reduced diameter portion 8a of the tumbler pin 8.

  At this time, since the locking bar 16 can move in the radial direction of the inner cylinder 3 along the slot 15, when the key 19 is rotated in this state, the locking bar 16 is sheared along the cam groove 14 as shown in FIG. 6. Retreating to the line, the restraints of all the inner cylinders 3 are released, and unlocking is possible.

  FIG. 7 shows the action when the picking action is performed on the cylinder lock 1. When performing the picking action, it is necessary to push the tumbler pin 8 and move it while inserting the pick 20 and applying torque to the inner cylinder 3, but the cylinder pin 11 protrudes to the front row on the side where the key is inserted. Therefore, it is impossible to insert the pick 20 while avoiding this. If the cylinder pin 11 is moved to form a space for pick operation, the outer end surface of the cylinder pin 11 exceeds the shear line 13 and the inner cylinder 3 is locked.

  The cylinder lock of the present invention can also be applied by newly attaching the cylinder pin of the present invention to the front surface portion of the cylinder lock having a conventional configuration, and has an effect of preventing picking.

It is a longitudinal cross-sectional view of a cylinder lock. It is sectional drawing which shows the II-II cross section of FIG. It is sectional drawing which shows the III-III cross section of FIG. It is a longitudinal cross-sectional view of the cylinder lock at the time of insertion of a key. It is sectional drawing which shows the VV cross section of FIG. It is sectional drawing which shows the VV cross section at the time of rotation. It is a longitudinal cross-sectional view of the cylinder lock at the time of a picking action.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylinder lock 2 Outer cylinder 3 Inner cylinder 5 Key hole 8 Tumbler pin 9 Cylinder hole 10 Cylinder spring 11 Cylinder pin 12 Driver pin 13 Shear line

Claims (1)

  An outer cylinder, an inner cylinder that is rotatably inserted into the outer cylinder and forms a key hole in the axial direction, and a plurality of key hole projecting members that are movable with respect to the key hole by an elastic member; In the cylinder lock that locks or unlocks the inner cylinder by allowing the inner cylinder to be restrained and released with respect to the outer cylinder by the movement of the key hole protruding member, the outer cylinder and the key insertion side of the key hole protruding member A cylinder hole that penetrates the inner cylinder in the radial direction and communicates with the key hole in the same direction as the movement direction of the key hole protruding member is formed, and a set of a cylinder pin and a driver pin biased in the key hole direction is formed in this cylinder hole. A cylinder lock characterized by being slidably housed and configured so that the outer end surface of the cylinder pin that contacts the driver pin is aligned with the shear line when the tip of the cylinder pin is located near the center of the keyhole.

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