JP5809426B2 - Cylinder lock - Google Patents

Description

   The present invention relates to a cylinder lock.

  A cylinder lock described in Patent Document 1 is known as a cylinder lock that cuts off transmission of an operation force to a lever that drives an operation object when an unauthorized operation force is applied to a plug inserted into the case.

  In this conventional example, the cylinder lock is freely inserted into the stator sleeve (2) and the stator sleeve (2), which are rotatable in the case and restricted relative to the case by the indexing member (11). The rotating ring (20) that rotates with the rotor (1) and is axially movable with respect to the rotor (1), the lock piece operating member (lever) connected to the rotor (1), and the lever is initially rotated. And a sliding member (24) which cannot be rotated relative to the case in order to be held in position. The sliding ring is provided with an operating projection that engages and disengages in a recess provided in the lever, and the lever rotates together with the sliding ring, that is, the rotor (plug) when the operating projection of the sliding ring is engaged with the recess. .

  In the initial state, the operating protrusion and the recess are held in a non-engaged state, and the lever is locked to the sliding member and the rotation is restricted and held in the initial rotation position, so that a genuine key is not inserted. If an unauthorized unlocking operation force is applied to the plug in this state, a large relative rotational force is generated between the sliding ring connected to the plug via the lock pin (tumbler) and the case, and the sliding ring rotates relative to the case. When enabled and the plug is further rotated, the sliding ring rotates with the plug. In this state, since the sliding ring and the lever are not connected, the lever does not rotate, and unauthorized operation is restricted.

  On the other hand, when the genuine unlocking key is inserted and the plug is rotated, the plug rotates with respect to the sliding ring. A cam that moves the sliding ring in the axial direction by the relative rotation of the plug is formed between the sliding ring and the plug. The sliding ring and the lever engage with each other as the sliding ring moves as the plug rotates. Thereafter, the lever rotates with the rotation of the plug.

JP-A-1-315559

  However, in the above-described conventional example, when the plug is normally rotated, the sliding ring is retracted and the sliding member is retracted so as to be pushed by the sliding ring to release the restraint on the lever. And the lever are configured to rotate, there are the following problems.

  That is, the sliding ring connected to the plug in the rotation direction moves backward while rotating in accordance with the rotation operation of the plug and pushes out the sliding member, but the sliding ring is released until the sliding member is unlocked. Needs to be idle with respect to the lever. In the above-described conventional example, the "right key (7) is inserted in the second column and the third column on page 5 of Patent Document 1 and the rotor (1) is inserted, for example, When the predetermined angle of 30 degrees is rotated, the lock piece actuating member (27) is coupled to the rotor (1) and can be rotated together therewith. The idling angle of is set.

  This idling angle acts as a play angle in the reverse direction in which the plug is rotated, i.e., the locking direction during the unlocking operation.For example, when a biasing force in the counterclockwise direction is applied to the lever, Problems such as insufficient lever operating angle occur.

  For this reason, this conventional example has a problem that usage conditions are limited and versatility is low.

  The present invention has been made to eliminate the above drawbacks, and an object thereof is to provide a highly versatile cylinder lock.

According to the present invention, the sleeve 3 is inserted into the case 1 so as to be freely rotatable, and the idling operation with the case 1 is restricted until a predetermined idling operation force is reached by the rotation stopper 2;
A plug 6 having a tumbler 5 which is rotatably inserted into the sleeve 3 and engages / disengages with a lock groove 4 formed in the sleeve 3;
A joint 7 that is rotatable relative to the sleeve 3 and the plug 6;
A connecting member 8 that is attached to the plug 6, moves in the axial direction of the plug 6 as the plug 6 rotates, and engages and disengages with the joint 7;
The joint 7 is held at the initial rotation position by the urging force of the torsion spring 9, and
The connecting member 8 and the joint 7 are unlocked when the plug 6 is in the initial rotation position with respect to the sleeve 3, and the connection member 8 and the joint 7 are disengaged as the plug 6 is rotated relative to the sleeve 3 in the unlocking rotation position direction. This is accomplished by providing a cylinder lock that is connected in both directions.

  In the present invention, when an unauthorized rotational operation force is applied to the plug 6 without inserting a genuine unlocking key into the plug 6, the rotational operation force is applied to the sleeve 3 connected to the plug 6 in the rotational direction via the tumbler 5. Communicated. Along with the transmission of the rotational operation force to the sleeve 3, a relative torque is generated between the sleeve 3 and the case 1, the rotation stopper 2 is released, and the sleeve 3 rotates idly with respect to the case 1.

  In the initial state, the connecting member 8 connected to the plug 6 and the joint 7 are in the unlocked state, so that the improper rotational operation force to the plug 6 is not transmitted to the joint 7, and is not transmitted through the joint 7. Unauthorized operations on the operation target are surely prevented.

  On the other hand, when the plug 6 is rotated using a genuine unlocking key, the connecting member 8 moves in the axial length direction of the plug 6 as the plug 6 rotates.

  On the other hand, the joint 7 is held at the initial rotational position by the urging force of the torsion spring 9, that is, the position where the joint 7 can be engaged with the joint 7. 7, the joint 7, that is, the operation target can be operated by operating the plug 6 thereafter.

  In the present invention in which the urging force in the rotational direction is used without using a member accompanying movement of the plug 6 in the axial length direction as a holding means for holding the joint 7 in the initial rotational position, the connecting member 8 is connected to the joint 7. And the timing for releasing the constraint on the joint 7 to the initial rotation position need not be matched.

  As a result, there is no need to set a play angle for timing adjustment between the connecting member 8 and the joint 7 as in the conventional example described above, and the joint 7 and the plug 6 are completely in the rotational direction. It becomes possible to connect.

  Although the torsion spring 9 can be housed in the case 1, a lever mounting portion 10 is extended from the rear end of the joint 7, and the lever mounting portion 10 and the case 1 are supported by the reaction force of the torsion spring 9. In this way, when the lever 17 and the torsion spring 9 that are operating members to be locked and unlocked are mounted outside the case 1, the mounting workability is improved and the lever 17 is connected to the joint. By connecting to 7, if necessary, it is possible to provide a play in the rotational direction between the lever 17 and the joint 7.

  The joint 7 is held at the initial rotational position by the torsion spring 9 by providing the case 1 with the joint 7 or the rotation stopper 2 that determines the end of one rotation stroke of the lever 17 integrally connected thereto. By applying a biasing force to the joint 7 toward the contact side of the rotation stopper 2, or as shown in FIG. 3, the leg portions 11 formed at both ends of the coil portion 9a of the torsion spring 9 are connected to the joint 7 respectively. , And by locking the case 1.

Connecting the connecting member 8 and the joint 7 without any play
One of the connecting member 8 and the joint 7 is provided with a connecting protrusion 12, and the other is provided with a connecting recess 13 that faces the connecting protrusion 12 in the axial direction of the plug 6 when starting the connection. Can be realized.

  The connection protrusion 12 and the connection recess 13 move in the axial direction of the plug 6 as the plug 6 rotates toward the unlocking rotation position, approach each other, and face each other immediately before connection. Is fitted in the connecting recess 13 and thereafter connected in either direction of locking and unlocking to such an extent that harmful play does not occur. When the plug 6 is in the initial rotation position, a deviation angle (initial deviation angle) in the rotation direction is set between the connection protrusion 12 and the connection recess 13. The initial deflection angle is not a problem when the distance between the connecting projection 12 and the connecting recess 13 is narrow in the initial state, and a taper or the like is provided at the tip of the connecting projection 12 and the connecting recess 13. Thus, the initial deflection angle can be substituted.

As in the conventional example described above, the connecting member 8 is driven by forming a cam at the contact portion between the connecting member 8 urged forward by the compression spring and the sleeve 3, and with the rotation of the plug 6, It is possible to move in the axial direction,
When the connecting member 8 constitutes a cylinder lock fitted to the plug 6 by movably fitting the follower projection 15 to the cam groove 14 formed in the sleeve 3, it is necessary to use a compression spring or the like. This eliminates the need for structure and assembly.

  According to the present invention, since the rotation operation of the plug can be completely transmitted to the joint at the time of connection, for example, a lever for operating the locking / unlocking operation target is integrally connected to the joint, or the joint and the lever are It is possible to flexibly match the state of the locking / unlocking operation target, such as setting a play angle between them, and the versatility can be improved.

It is a figure which shows this invention, (a) is sectional drawing, (b) is the 1B-1B sectional view taken on the line of (a). 2A and 2B are cross-sectional views taken along the line 2A-2A in FIG. 1B excluding the sleeve, and FIG. 2B is a view taken in the direction of the arrow 2B in FIG. 3A and 3B are views showing the operation of the present invention, in which FIG. 1A is a cross-sectional view taken along line 3A-3A in FIG. 1B, FIG. 1B is a cross-sectional view taken along line 3B-3B in FIG. FIG. 3B is a sectional view taken along line 3C-3C in FIG. 1B, FIG. 3D is a sectional view taken along line 3D-3D in FIG. 1B, and FIG. 3E is a sectional view taken along line 3E-3E in FIG. It is a figure which shows a plug, (a) is sectional drawing, (b) is the 4B-4B sectional view taken on the line of (a). It is a figure which shows a connection member, (a) is a top view, (b) is a 5B direction arrow directional view of (a), (c) is a 5C direction arrow directional view of (b). It is a figure which shows operation | movement of this invention, (a) is sectional drawing which does not close the state where the joint was connected to the plug, (b) is sectional drawing on the 6B-6B line of (a), (c) is improper load is loaded. It is sectional drawing which shows the state which the rotation stopper act | operated.

  As shown in FIG. 1 and subsequent figures, the cylinder lock is formed by inserting a sleeve 3, a plug 6 and a joint 7 into the case 1. A sleeve 3, a plug 6, and a joint 7 are inserted from the front end of the case 1, are prevented from coming out backward by a stopper flange 1 a provided at the rear end of the case 1, and are attached to the front end of the case 1 The member 18 is prevented from coming forward.

  The sleeve 3 is formed in a hollow cylindrical shape and is rotatably inserted into the case 1, and relative rotation is restricted by a rotation stopper 2 disposed on the rotation boundary surface. The rotation stopper 2 includes a ball 2 a and a spherical stopper recess 2 b formed on the outer peripheral wall surface of the sleeve 3, and the case 1 is orthogonal to the rotation axis of the sleeve 3 to accommodate the ball 2 a. A ball housing portion 1b is formed in which the one end is opened on the inner wall surface.

  The ball 2a is urged in the direction of the rotation center axis of the sleeve 3 by a compression spring 19 disposed in the ball housing portion 1b, and is fitted into the stopper recess 2b.

  In this state, the case 1 and the sleeve 3 are coupled to each other in the rotational direction via the ball 2a. Further, when the sleeve 3 is relatively rotated with a predetermined torque in the case 1, as shown in FIG. The ball 2 a is immersed in the ball housing portion 1 b against the urging force of the compression spring 19 and the connection with the sleeve 3 is released. The torque for releasing the connection with the sleeve 3 is determined by the curvature and depth of the stopper recess 2b, the reaction force of the compression spring 19, and the like, and at least when the plug 6 is rotated by using a genuine unlocking key. Is not released, and if a tool such as a screwdriver is inserted into the plug 6 and the plug 6 is rotated improperly, excessive stress is applied to the tumbler 5 and the like which will be described later, causing deformation. The connection strength is set such that the connection is released before the occurrence or the like occurs.

  The plug 6 is rotatably inserted into the sleeve 3, and the relative rotation with respect to the sleeve 3 is restricted by engaging a plurality of tumblers 5 that move in a direction perpendicular to the rotation axis with the lock grooves 4 formed in the sleeve 3. Held at the initial rotation position.

  The joint 7 is disposed behind the plug 6 with the front end face in contact with the rear end face of the plug 6. The joint 7 is rotatably inserted into the sleeve 3 with the outer peripheral surface being in sliding contact with the inner peripheral wall surface of the sleeve 3, and a retaining flange 7 a protruding from the intermediate portion is provided as a stopper flange 1 a of the case 1. The contact to the rear of the case 1 is restricted.

  Further, the joint 7 is provided with a lever mounting portion 10 that extends further rearward from the position where the retaining flange 7a is formed and protrudes from the rear end of the case 1, and the lever 17 is fixed to the tip of the lever 7 using the retaining ring 20. Is done. As shown in FIGS. 2 and 3, a torsion spring 9 is wound around the lever mounting portion 10, and the leg portions 11 formed at both ends of the coil portion 9 a of the torsion spring 9 are locked to the spring locking portion 21. Is done.

  The spring locking portion 21 is arranged so as to be adjacent to both the case 1 and the joint 7, and the leg portion 11 of the torsion spring 9 is set so as to abut against both, and both the leg portions 11 are opposite to the joint 7. The joint 7 is held at the initial rotational position by applying a rotational torque. When the joint 7 is rotated to either one from this state, only the other leg 11 rotates following the joint 7 while the one leg 11 of the torsion spring 9 is locked to the case 1. The bending angle of the coil portion 9a is increased, and the restoring force gives the joint 7 an urging force toward the initial rotational position, and returns to the initial rotational position when the rotational operation force to the joint 7 is released. Can do.

  A connecting member 8 is disposed at the boundary between the plug 6 and the joint 7. As shown in FIG. 5, the connecting member 8 is a piece-like member formed by projecting a follower projection 15 on a slider portion 8 a having a rear end portion as a connecting projection 12, and is formed on the outer periphery of the plug 6. The slider portion 8 a is fitted into the guide groove 16 and attached to the plug 6. The connecting member 8 is movable in the axial length direction of the plug 6. When the plug 6 is attached to the plug 6, the guide groove 16 is complemented by the slider portion of the connecting member 8, and the slider portion and the surface of the plug 6 are substantially the same surface. Thus, the follower protrusion 15 protrudes from the outer periphery of the plug 6.

  On the other hand, the sleeve 3 is formed with a cam groove 14 in which the follower projection 15 of the connecting member 8 is movably fitted. As shown in FIG. 2, the cam groove 14 is formed in a square shape in a plan view that gradually moves rearward as it goes from the refractive base portion 14 a located at the center portion to the free end portion 14 b. The follower projection 15 of the connecting member 8 is positioned at the refractive base portion 14a of the cam groove 14 when the plug 6 is in the initial rotation position with respect to the sleeve 3, and is formed in the cam groove 14 along with the relative rotation of the plug 6 with respect to the sleeve 3. It is guided rearward while moving in the direction of any free end 14b along.

  Further, the rear end of the connecting projection 12 of the connecting member 8 coincides with the rear end of the plug 6 at the initial rotation position with respect to the sleeve 3, and moves rearward along with the movement of the follower protrusion 15 to move the rear end of the plug 6. Protrudes from the edge.

  Further, a connecting recess 13 is formed at the front end of the joint 7. As shown in FIGS. 1 and 2, the connecting recess 13 is formed in such a size that the connecting protrusion 12 of the connecting member 8 is fitted and excessive play in the rotational direction at the time of fitting does not occur. . When the plug 6 is rotated from the initial rotation position, the connection protrusion 12 moves rearward while rotating, so that the connection recess 13 is connected to the connection protrusion 12 when the fitting operation with the connection protrusion 12 is performed. It is arrange | positioned in the position which opposes.

  In the present embodiment in which the tip end of the connecting protrusion 12 and the front end of the connecting recess 13 are close to each other, the connecting protrusion 12 and the connecting recess 13 are arranged at positions facing each other in the initial rotation position. In order to absorb errors and the like at the time of fitting, a chamfer can be provided at the fitting tip of the connecting protrusion 12 or the connecting recess 13.

  Accordingly, in this embodiment, the state in which the sleeve 3 is fixed in the rotational direction with respect to the case 1 and the plug 6 is in the initial rotational position with respect to the sleeve 3 corresponds to the locked state. As described above, the connecting member 8 and the joint 7 are not connected in the locked state, and if an inappropriate rotational operation force is applied to the plug 6, the rotation stopper 2 is released as shown in FIG. As a result, the joint 7 idles with respect to the case 1, and as a result, the joint 7 and the lever 17 do not rotate.

  On the other hand, when the plug 6 is rotated using a genuine unlocking key, the plug 6 can rotate relative to the sleeve 3. As shown in FIGS. 6A and 6B, when the plug 6 rotates relative to the sleeve 3, the connecting member 8 is moved backward by the action of the cam structure formed between the connecting member 8 and the sleeve 3. After moving and connecting to the joint 7, the joint 7 and the lever 17 are rotated along with the rotation of the plug 6 so that the object to be locked and unlocked can be operated.

DESCRIPTION OF SYMBOLS 1 Case 2 Rotation stopper 3 Sleeve 4 Lock groove 5 Tumbler 6 Plug 7 Joint 8 Connection member 9 Torsion spring 10 Lever attachment part 11 Leg part 12 Connection protrusion 13 Connection recessed part 14 Cam groove 15 Followers protrusion 16 Guide groove

Claims (5)

A sleeve that is freely inserted into the case and that is prevented from idling with the case until a predetermined idle operation force is reached by the rotation stopper;
A plug having a tumbler that is rotatably inserted into the sleeve and engages / disengages in a lock groove formed in the sleeve;
A joint that is rotatable relative to the sleeve and the plug;
A connecting member that is attached to the plug, moves in the plug shaft length direction as the plug rotates, and engages and disengages from the joint;
The joint is held at the initial rotational position by the biasing force of the torsion spring,
The connecting member and the joint are unlocked when the plug is in the initial rotation position with respect to the sleeve, and are connected in both directions of unlocking and unlocking as the plug rotates relative to the sleeve in the unlocking rotation position. Cylinder lock. At the rear end of the joint is extended a lever mounting portion protruding from the case,
The cylinder lock according to claim 1, wherein the torsion spring is mounted by connecting a leg portion to the lever mounting portion and the case.   3. A connection protrusion is provided on one of the connection member and the joint, and a connection recess is formed on the other of the connection member and the connection protrusion to face the connection protrusion in the length direction of the plug shaft when the connection is started. Cylinder lock as described.   3. The cylinder lock according to claim 1, wherein the connecting member is attached to the plug with a follower protrusion movably fitted in a cam groove formed in the sleeve. The cylinder lock according to claim 1, 2, 3, or 4, wherein the connecting member is formed in a piece shape and is movably fitted in a guide groove that is recessed in the plug surface.

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