JP5112254B2 - Cylinder lock protector - Google Patents

Description

  The present invention includes a casing that has an insertion hole corresponding to a key hole provided in an inner cylinder of a cylinder lock and is fixed to a cylinder body of the cylinder lock, a closed position that closes the insertion hole, and the insertion hole. A shutter plate that is supported on the casing so as to be able to operate along a plane perpendicular to the axis of the key hole between the open positions to be opened, and the shutter plate is held in the closed position during locking and unlocked. A magnetic lock that enables the shutter plate to be operated from the closed position to the open position, and the shutter plate automatically moves from the open position to the closed position in response to a mechanical key being pulled out from the key hole. The present invention relates to a protection device for a cylinder lock which is automatically restored.

After operating the shutter plate that closes the key hole to the open position according to the unlocking of the magnetic lock, the shutter plate automatically returns to the closed position when the mechanical key inserted in the key hole is pulled out. For example, Patent Document 1 has already known a cylinder lock protection device that enhances operability and prevents forgetting to close.
Japanese Patent Laying-Open No. 2005-076204

  However, in the one disclosed in Patent Document 1, the shutter plate always moves from the open position to the closed position as the mechanical key is pulled out from the key hole. For example, in a cylinder lock for a motorcycle, When the mechanical key is pulled out from the key hole when the vehicle is stopped, the shutter plate automatically moves to the closed position, which is inconvenient when it is not desired to close the shutter plate, such as when the vehicle is temporarily stopped.

  The present invention has been made in view of such circumstances, and when the mechanical key is pulled out from the key hole, the shutter plate is automatically moved to the closed position to improve the operability, so that the user cannot forget to close it. An object of the present invention is to provide a cylinder lock protection device capable of preventing automatic movement of the shutter plate to the closed position when necessary.

  To achieve the above object, the present invention provides a casing that has an insertion hole corresponding to a key hole provided in an inner cylinder of a cylinder lock and is fixed to a cylinder body of the cylinder lock, and the insertion hole is closed. A shutter plate that is supported on the casing so as to be operable along a plane perpendicular to the axis of the key hole between a closed position for opening and an open position for opening the insertion hole, and the shutter plate is closed when locked. And a magnetic lock that allows the shutter plate to be operated from the closed position to the open position when unlocked, and the shutter plate is moved in response to the mechanical key being pulled out from the key hole. In the protection device for the cylinder lock, which automatically returns from the open position to the closed position, the shutter plate Alternatively, an interlocking member that operates in conjunction with the shutter plate and a resilient means that is provided between the casing and biases the shutter plate toward the closed position, and the shutter plate or the interlocking member has the shutter plate attached to the shutter plate. First and second engaging members that can automatically engage in response to an operation from the closed position to the open position to hold the shutter plate in the open position; and the shutter plate in the open position or the A third engaging member that is supported on the casing to enable a movement operation between a position for engaging with the interlocking member and a position for releasing the engagement; an operation of the shutter plate; and a mechanical key for the key hole. Cam means for actuating the first and second engaging members in response to insertion / removal and rotation operation by the mechanical key, the cam means, In response to the operation of the shutter plate from the closed position to the open position, the first engagement member is engaged with the shutter plate or the interlocking member from the closed position side, and the key hole at the key insertion / removal position is inserted into the key hole. In response to insertion of a mechanical key, the second engagement member is engaged with the shutter plate or the interlocking member from the closed position side, and in response to a turning operation to the on position by the mechanical key inserted into the key hole. The first engagement member is disengaged from the shutter plate or the interlocking member, and the shutter of the second engagement member is released in response to the mechanical key being pulled out of the key hole at the key insertion / removal position. The engagement with the plate or the interlocking member is released.

  The return spring 61 of the embodiment corresponds to the elastic means of the present invention.

  According to the above configuration of the present invention, when the magnetic lock is unlocked and the shutter plate is operated from the closed position to the open position, the first engagement member is moved to the shutter plate or the interlocking member interlocked with the shutter plate. The second engagement member is engaged with the shutter plate or the interlocking member from the closed position by inserting the mechanical key into the key hole, and the first engagement is performed according to the turning operation to the ON position by the mechanical key. Although the engagement of the engagement member with the shutter plate or the interlocking member is released, the second engagement member remains engaged with the shutter plate or the interlocking member, so that the mechanical key is inserted into the key hole. The shutter plate is held in the open position. Further, when the mechanical key is pulled out from the key hole at the key insertion / removal position, the engagement of the second engagement member with the shutter plate or the interlocking member is released, so that the shutter plate is moved from the open position by the elastic force of the elastic means. It will automatically return to the closed position. That is, since the shutter plate automatically returns to the closed position in accordance with the mechanical key being pulled out at the key insertion / removal position, the operability can be improved and the anti-theft performance can be improved so as not to forget to close. On the other hand, a third engagement member is supported on the casing so as to enable a movement operation between a position where the shutter plate or the interlocking member is in the open position and a position where the engagement is released. When the engagement member is operated to engage the shutter plate or interlocking member in the open position, even if the mechanical key is pulled out in the key insertion / removal position, the shutter plate remains in the open position and automatically moves to the closed position. It is possible to improve convenience by preventing the shutter plate from automatically moving to the closed position when necessary.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIGS. 1 to 13 show an embodiment of the present invention. FIG. 1 is a front view of a cylinder lock protection device in a state where a key hole in a locked position is closed by a shutter plate, and FIG. Fig. 3 is an exploded perspective view of the cylinder lock protection device, Fig. 4 is a partially cutaway side view of the mechanical key and magnet key, and Fig. 5 is a state in which the shutter plate is in the closed position. 2 is a sectional view taken along line 5-5 in FIG. 2, FIG. 6 is a sectional view taken along line 6-6 in FIG. 2 in a state where the shutter plate is in the open position, and FIG. 2 is a cross-sectional view taken along line 7-7 in FIG. 2, and FIG. 8 is a cross-sectional view corresponding to FIG. 7 with the mechanical key inserted into the key hole in the locked position. FIG. FIG. 10 is a cross-sectional view corresponding to FIG. FIG. 11 is a cross-sectional view corresponding to FIG. 7 when the key is turned to the on position, FIG. 11 is a cross-sectional view corresponding to FIG. 7 in a state where the mechanical key is extracted at the off position, and FIG. FIG. 13 is a cross-sectional view corresponding to FIG. 6 when the mechanical key is extracted with the third engagement member engaged with the interlocking member.

  First, in FIG. 1 and FIG. 2, a cylinder body 21 of a cylinder lock 20 for a vehicle such as a motorcycle is provided on a head pipe (not shown) of a vehicle body frame, and a front end portion of the cylinder body 21 is covered with a casing 22. Is called. The casing 22 has a case member 23 made of a non-magnetic material attached to the front end portion of the cylinder body 21 and a side wall 24 a that covers the case member 23 from the side, and the case member 23 is opposite to the cylinder body 21. A cover member 24 made of a nonmagnetic material covering from the side, and a flat back plate 25 sandwiching the case member 23 between the cover member 24, the case member 23, the cover member 24, and the back plate 25, The casing 22 is configured by being fastened by a plurality of, for example, two screw members 26, 26, and the casing 22 is fixed to the cylinder body 21.

  The cylinder lock 20 has an inner cylinder 27 that is rotatably inserted into the cylinder body 21, and the inner cylinder 27 has a rectangular key hole 28 that is long in a direction perpendicular to the rotation axis. The key hole 28 is opened at the center of the front end of the cylinder lock 20.

  Referring also to FIG. 3, the casing 22 is provided with an insertion hole 29 corresponding to the key hole 28. The insertion hole 29 is constituted by circular through holes 30 and 31 provided coaxially in the case member 23 and the cover member 24, respectively, and an outer end portion of the through hole 31 of the cover member 24 is a mechanical key 33 (see FIG. 4) is formed in a tapered shape. The back plate 25 is provided with an opening 32 having a larger diameter than the through holes 30 and 31 of the case member 23 and the cover member 24 corresponding to the through holes 30 and 31.

  Between the case member 23 and the cover member 24 in the casing 22, the key is between a closed position for closing the insertion hole 29 and the key hole 28 and an open position for opening the insertion hole 29 and the key hole 28. A shutter plate 34 that can be operated along a plane perpendicular to the axis of the hole 28 is accommodated.

  The operation of the shutter plate 34 from the closed position to the open position is permitted by fitting the magnet key 37 into the fitting recess 36 provided in the magnet lock 35 disposed in the casing 22. The lock 35 includes a rotor 38 formed separately from the shutter plate 34, and the fitting recess 36 is formed in the rotor 38.

  The case member 23 of the casing 22 is integrally provided with a support protrusion 39 having a circular cross section protruding toward the cover member 24 at a position spaced from the insertion hole 29, and corresponds to the support protrusion 39. In part, the cover member 24 is provided with a circular opening 40.

  Referring also to FIG. 5, the rotor 38 includes a substantially cylindrical rotor main portion 38 b having an opposing wall portion 38 a facing the tip of the support protrusion 39 in the axially intermediate portion, and the rotor main portion 38 b. The connecting arm portion 38c that extends outward from the outer surface is integrally formed of a nonmagnetic material, and a long hole-like connecting hole 41 is provided at the tip of the connecting arm portion 38c. The support protrusion 39 is fitted to the inner end side of the rotor main portion 38b, and the rotor main portion 38b has an O-ring 45 interposed between a base portion of the support protrusion 39 and the rotor protrusion 38b. The support protrusion 39 is rotatably supported. Moreover, the outer end of the rotor main portion 38b is disposed so as to face the opening 40, and the outer end of the rotor main portion 38b forms the fitting recess 36.

  The fitting recess 36 of the rotor 38 is formed so as to have an irregular polygonal cross-sectional shape, and a protrusion 42 is provided at a substantially central portion of the fitting recess 36. Thus, only the magnet key 37 having a cross-sectional shape corresponding to the cross-sectional shape of the fitting recess 36 and having the recess 43 into which the protrusion 42 is fitted can be fitted into the fitting recess 36. As shown in FIG. 4, the key 37 is attached to a grip 44 provided on a regular mechanical key 33 that can be inserted into the key hole 28.

  A plurality of, for example, four sliding recesses 47 corresponding to square corners, for example, are provided at the tip of the support protrusion 39 so as to open to the opposing wall 38a side of the rotor 38. In the three sliding recesses 47 selected from among the sliding recesses 47, rod-like permanent magnets 48 are slidable so that the magnetic pole arrangement on the opposing wall 38a side is appropriately combined. Between the bottoms of the three sliding recesses 47 and the permanent magnets 48 are springs 49 that spring-bias the permanent magnets 48 toward the side projecting from the tip of the support projection 39. Each is provided.

  The opposing wall 38a of the rotor 38 is provided with four engagement recesses 50, and a part of each of the permanent magnets 48 is engaged with three of the engagement recesses 50, respectively. In this state, the rotation operation of the rotor 38 is prevented.

  On the other hand, the magnet key 37 has a plurality of, for example, four receiving recesses 51 arranged at positions corresponding to the four engaging recesses 50 provided on the opposing wall 38 a of the rotor 38. The bar-shaped permanent magnets 52 are accommodated in three of the accommodating recesses 51, respectively. Moreover, the open end of each accommodation recessed part 51 ... is closed with the obstruction board 53 made from a nonmagnetic material fixed to the magnet key 37. As shown in FIG.

  The permanent magnets 52 arranged on the magnet key 37 are arranged such that the same magnetic poles as the magnetic poles on the opposing wall portion 38a side of the permanent magnets 48 on the support protrusion 39 side are arranged on the opposing wall portion 38a side. When the regular magnet key 37 is fitted in the fitting recess 36, the permanent magnet 48 on the support projection 39 side is spring-loaded by the repulsive force of the same magnetic pole. 49 is pushed into the sliding recesses 47 so as to disengage from the engaging recesses 52 against the spring force of 49... Thereby allowing the rotor 38 to rotate.

  In addition, as shown in FIG. 3, between the case member 23 and the rotor 38, a click recess (not shown) provided at two positions spaced apart in the circumferential direction on the rotor 38 side is alternatively used as an elastic member. A click mechanism 56 having a click ball 54 to be combined, and a click spring 55 that is contracted between the click ball 54 and the case member 23 by exerting a spring force that biases the click ball 54 toward the rotor 38. A click feeling can be obtained by the click mechanism 56 when the rotor 38 is rotated when the magnetic lock 35 is unlocked.

  The shutter plate 34 includes a flat shutter main portion 34a capable of closing the insertion hole 29, a connecting arm portion 34b extending from the shutter main portion 34a toward the connecting arm portion 38c of the rotor 38, and the connecting arm portion 34b. The connecting arm portion 38c is integrally provided with a connecting protrusion 34c that is connected to the end of the connecting arm portion 38c and protrudes on the opposite side of the insertion hole 29 and the opening 40. A connecting pin 57 to be inserted into the connecting hole 41 of the connecting arm portion 38c of the 38 is protruded integrally.

  The shutter plate 34 is positioned on the axis of the key hole 28 between a closed position for closing the insertion hole 29 as shown in FIG. 5 and an open position for opening the insertion hole 29 as shown in FIG. The case member 23 is provided with a guide groove 59 that can be operated in an operation direction indicated by an arrow 58 along an orthogonal plane, and that extends in a direction along the operation direction 58. An interlocking member 60 that operates in conjunction with the shutter plate 34 is fitted in the guide groove 59 so as to be able to slide in the operation direction.

  The interlocking member 60 is provided with an engaging protrusion 60a that comes into contact with and engages with the connecting protrusion 34c of the shutter plate 34 from the open position side, and the elastic means accommodated in the guide groove 59. A spring receiving portion 60b for interposing the return spring 61 between the casing 22 and the case member 23 is projected, and the interlocking member 60 closes the shutter plate 34 in the closed position by the elastic urging force of the return spring 61. In this manner, the shutter plate 60 is brought into contact with and engaged with the shutter plate 60 from the open position side.

  By the way, the inner cylinder 27 of the cylinder lock 20 can be rotated from the lock (LOCK) position to the on (ON) position by the operation of the mechanical key 33 inserted into the key hole 28. The engine (not shown) can be ignited at the ON position. In the cover member 24 of the casing 22, the positions of LOCK, OFF, and ON are displayed around the insertion hole 29, that is, the through hole 31, and the inner cylinder 27 has a rectangular cross section. By aligning the longitudinal direction of the cross-section of the key hole 28 having a shape with the LOCK, OFF, and ON positions, the key hole 28 is positioned at the lock position, the off position, and the on position. Thus, the lock position is to lock the steering handle (not shown), and the cylinder lock 20 requires a push operation of the mechanical key 33 to rotate the inner cylinder 27 between the lock position and the off position. A mechanism (not shown) is provided. Further, the insertion / removal operation of the mechanical key 33 with respect to the key hole 28 is possible in any state when the inner cylinder 27 is in the locked position and when the inner cylinder 27 is in the off position.

  In the casing 22, the return spring 61, first and second engaging members 63 and 64 that can be engaged with the shutter plate 34 in the open position and hold the shutter plate 34 in the open position, The cam means 65 for operating the first and second engaging members 63 and 64 is accommodated so as to operate along a plane perpendicular to the axis of the key hole 28.

  The cam means 65 is pushed by a disc-shaped cam plate 66 rotatably held by the case member 23 so as to be able to slide in the radial direction of the cam plate 66. The cam plate 66 is connected to the inner cylinder 27 of the cylinder lock 20 in a relatively non-rotatable manner.

  A circular support recess 68 that is coaxial with the insertion hole 29 is provided on the surface of the case member 23 on the cylinder lock 20 side, and the cam plate 66 is rotatably fitted in the support recess 68. The On the other hand, the back plate 25 fastened to the case member 23 is provided with a circular opening 32 coaxially with the insertion hole 29 so as to face a part of the cam plate 66 fitted in the support recess 68. The back plate 25 is fastened to the case member 23 so as to sandwich the outer peripheral portion of the cam plate 66 with the case member 23, and is provided integrally with the cam plate 66 and penetrates the opening 32. The plurality of, for example, two connecting shaft portions 66a and 66b are engaged with the inner cylinder 27 of the cylinder lock 20 so that the cam plate 66 is connected to the inner cylinder 27 so as not to be relatively rotatable.

  Referring also to FIG. 7, a through-hole 70 formed in a rectangular cross section corresponding to the key hole 28 of the cylinder lock 20 is formed in the central portion of the cam plate 66. It is provided so as to be interposed between the key holes 28. A fitting hole 71 having an inner end opened to the through hole 70 and an outer end opened to the outer periphery of the cam plate 66 is formed on the surface of the cam plate 66 facing the case member 23. The push plate 67 is slidably fitted in the fitting hole 71 so as to extend in the radial direction.

  An inner end portion of the push plate 67 is formed so as to close the through hole 70, and an outer end of the push plate 67 is formed in an arc shape having the same curvature as the outer periphery of the cam plate 66. Thus, when the inner end of the push plate 67 is in a position to close the through hole 70, the outer end of the push plate 67 is inward of the outer periphery of the cam plate 66. When the portion is in a position to open the through hole 70, the outer end of the push plate 67 is in a position that is flush with the outer periphery of the cam plate 66. In addition, springs 72 and 72 for urging the push plate 67 are provided on both sides of the push plate 67 and between the cam plates 66 on the side closing the through hole 70.

  On the surface of the cam plate 66 facing the insertion hole 29, the tip of the mechanical key 33 inserted in the insertion hole 29 is guided to the through hole 70 on the opposite side of the push hole 67 with respect to the through hole 70. An arcuate guide surface 73 is provided, and a pressure receiving surface 74 that abuts the tip of the mechanical key 33 guided by the guide surface 73 is provided at the center in the width direction of the inner end of the push plate 67. It is done. The pressure receiving surface 74 is formed on the cam plate 66 so as to open the through hole 70 when the tip of the mechanical key 33 pushed into the insertion hole 29 to be inserted into the key hole 28 contacts the pressure receiving surface 74. The mechanical key 33 is formed so that a radially outward force is applied to the push plate 67. The mechanical key 33 inserted into the insertion hole 29 and abutted against the pressure receiving surface 74 moves the push plate 67 to the cam plate. 66 is inserted into the key hole 28 from the through hole 70 so as to be pushed outward in the radial direction.

  A first recess 75 and a second recess 76 are provided on the outer periphery of the cam plate 66 at intervals in the circumferential direction, and the first recess 75 is the back of the thickness along the axial direction of the cam plate 66. It is formed in a substantially half part on the plate 25 side. The second recess 76 is provided on the outer periphery of the cam plate 66 at a portion facing the outer end of the push plate 67 and is formed over the entire axial thickness of the cam plate 66.

  The first engagement member 63 includes a substantially circular pivotal support part 63a that is fitted to the case member 23 side and supported so as to be swingable, a fitting part 63b that extends from the pivotal support part 63a to the cam plate 66 side, An engaging portion 63c extending from the pivotal support portion 63a to the interlocking member 60 side is integrally provided and disposed between the case member 23 and the back plate 25 of the casing 22.

  The front end of the fitting portion 63b can abut on the outer periphery of the cam plate 66, and the case member 23 has a portion of the outer periphery of the cam plate 66 facing the first engagement member 63 side. A notch 77 is provided so as to cut out a part of the side wall of the support recess 68. Thus, when the cam plate 66 is in the locked position together with the inner cylinder 27 of the cylinder lock 20, the tip of the fitting portion 63b can be fitted into the first recess 75 of the cam plate 66, and the cam plate 66 can be When the inner cylinder 27 and the inner cylinder 27 are in the off position and the on position, the tip of the fitting portion 63 b is in sliding contact with the outer periphery of the cam plate 66. Moreover, since the first recess 75 is formed in substantially half of the thickness along the axial direction of the cam plate 66, the fitting portion 63b is also approximately half of the thickness along the axial direction of the cam plate 66. It is formed to have a thickness of the part.

  The case member 23 is provided with a window 78 that allows a part of the interlocking member 60 to face the first engagement member 63 so as to cut out a part of the side wall of the guide groove 59. The interlocking member 60 is provided with a first locking portion 79 that engages the distal end portion of the engaging portion 63c protruding from the window 78 from the closed position side when the shutter plate 34 is in the open position.

  A coiled torsion spring 80 is contracted between the first engagement member 63 and the case member 23, and the first engagement member 63 causes the fitting portion 63 b to be connected to the cam plate 66 by the spring force of the torsion spring 80. The engaging portion 63c is urged toward the side where it abuts against the first locking portion 79.

  Moreover, the first engaging member 63 can be engaged with the first locking portion 79 of the interlocking member 60 in a state in which the fitting portion 63b is fitted in the first recess 75 of the cam plate 66. In a state where the joining portion 63b is in contact with the outer periphery of the cam plate 66 at a place other than the first recess 75, the distal end portion of the engaging portion 63c is in a position facing the window 78, and the engaging portion 63c is engaged with the first locking portion 79. The tip of the stub does not engage.

  When the cam plate 66 rotates together with the inner cylinder 27 from the lock position toward the on position side with the fitting portion 63b fitted in the first recess 75, the first recess 75 is The engaging member 63 is rotated in the clockwise direction in FIG. 7 against the spring force of the torsion spring 80 so that the fitting portion 63b rides on the outer periphery of the cam plate 66, and the distal end portion of the engaging portion 63c is guided to the guide groove 59. To the window 78 side.

  When the shutter plate 34 is in the closed position as shown in FIG. 5, the fitting portion 63 b of the first engagement member 63 is fitted into the first recess 75, and the engagement portion 63 c is the side surface of the interlocking member 60. It is in the state where it is close to or in contact with. Thus, in the side surface on the first engagement member 63 side of the engagement protrusion 60a in the interlocking member 60, between the position where the engagement portion 63c approaches or comes into contact and the first locking portion 79, When the shutter plate 34, that is, the interlocking member 60 moves upward in FIG. 6 to move from the closed position to the open position, the first engaging member 63 is temporarily moved clockwise in FIG. 6 by contacting the engaging portion 63c. By turning, an inclined surface 81 for temporarily removing the fitting portion 63b from the first recess 75 is formed, and after the engaging portion 63c passes through the inclined surface 81, the first engaging member 63 is The fitting portion 63b is rotated so as to be fitted into the first recess 75, and the engaging portion 63c contacts and engages with the first locking portion 79 in this state.

  The second engagement member 64 is fitted to the case member 23 side and is supported so as to be swingable. The second support member 64 is supported by a substantially circular pivot 64a, the fitting 64b extending from the pivot 64a toward the cam plate 66, The case member 23 of the casing 22 includes an engaging portion 64c extending from the pivotal support portion 64a toward the guide groove 59 and a spring receiving portion 64d extending from the pivotal support portion 64a to the opposite side of the fitting portion 64b. It is arranged between the back plates 25.

  The front end of the fitting portion 64b can abut on the outer periphery of the cam plate 66, and the case member 23 has a portion of the outer periphery of the cam plate 66 facing the second engagement member 64 side. A notch 82 is provided so as to cut out a part of the side wall of the support recess 68. Thus, when the cam plate 66 is in the locked position together with the inner cylinder 27 of the cylinder lock 20, the distal end portion of the fitting portion 64 b can be fitted into the second recess 76 of the cam plate 66. Moreover, the second recess 76 is formed over the entire axial thickness of the cam plate 66, and the fitting portion 64 b is equal to or larger than the axial thickness of the cam plate 66 so as to be fitted into the second recess 76. It is formed to have a thickness, and the fitting portion 64 b does not fit into the first recess 75.

  In addition, the case member 23 has a window 83 that allows a part of the interlocking member 60 that slides together with the shutter plate 34 to face the second engaging member 64, so that a part of the side wall of the guide groove 59 is notched. A step-like second engagement that engages the interlocking member 60 from the closed position side when the shutter plate 34 is in the open position. A stop 84 is provided on the interlocking member 60.

  A coil spring 85 is provided between the second engagement member 64 and the case member 23, and the second engagement member 64 contacts the fitting portion 64 b against the outer periphery of the cam plate 66 by the spring force of the coil spring 85. It is energized to the contact side.

  In addition, in a state where the distal end portion of the fitting portion 64b of the second engagement member 64 is fitted in the second recess 76 of the cam plate 66, the distal end portion of the fitting portion 64b closes the through hole 70 of the cam plate 66. When the push plate 67 is pushed out in the radial direction of the cam plate 66 by inserting the mechanical key 33 into the through hole 70, the outer end of the push plate 67 is in contact with the outer end of the push plate 67. As shown in FIG. 8, the second engagement member 64 rotates in the clockwise direction in FIG. 8 against the spring force of the coil spring 85, so that the distal end portion of the engagement portion 64 c is the first of the interlocking member 60. 2 so as to be engaged into the guide groove 59 from the window 83 so as to engage with the engaging portion 84.

  Here, from the state in which the inner cylinder 27 of the cylinder lock 20 is in the locked position and the shutter plate 34 is in the closed position, the magnet lock 35 is unlocked to operate the shutter plate 34 to the open position, and the mechanical key 33 is pressed to the key. The operation state of each part after inserting and rotating in the hole 28 until the mechanical key 33 is pulled out will be described. After the magnet lock 35 is unlocked, the shutter plate 34 is being operated from the closed position to the open position. In the state, when the interlocking member 60 moves to the open position side due to the movement of the guide part 34 c in the shutter plate 34, the inclined surface 81 of the interlocking member 60 faces the engaging part 63 c of the first engaging member 63 on the closed position side. By abutting, the first engaging member 63 is screwed so that the fitting portion 63b can be detached from the first recess 75 of the cam plate 66. Against the spring force of the spring 80 to rotate.

  When the front inclined surface 81 passes over the engaging portion 63c and the shutter plate 34 reaches the open position, the insertion hole 29 is opened and the torsion spring 80 is rotated as shown in FIGS. The engaged portion 63c of the biased first engaging member 63 is engaged with the first locking portion 79 of the interlocking member 60 from the closed position side, and the spring force of the return spring 61 is acting. The shutter plate 34 is held in the open position. In addition, the case member 23 is provided with a fitting protrusion 87 for fitting and holding one end of the leaf spring 86, and the other end of the leaf spring 86 is a shutter in the shutter plate 34 in the open position. The main portion 34a abuts against the side surface opposite to the interlocking member 60, and the shutter plate 34 is pressed against the interlocking member 60 side, whereby rattling at the open position of the shutter plate 34 is suppressed.

  Next, when the mechanical key 33 is inserted into the insertion hole 29 and the mechanical key 33 is inserted into the through hole 70 in the cam means 65 as shown in FIG. 8, the push plate 67 in the cam means 65 moves outward in the radial direction of the cam plate 66. The second engaging member 64 that has been pushed into the second concave portion 76 and the fitting portion 64b is fitted in the second concave portion 76 rotates in the clockwise direction in FIG. 8, and the fitting portion 64b is detached from the second concave portion 76 and is engaged. The joint portion 64 c engages with the second locking portion 84 of the interlocking member 60 from the closed position side, and the shutter plate 34 is also held in the open position by the second engagement member 64.

  Further, as shown in FIG. 9, when the mechanical key 33 inserted into the key hole 28 is pushed and turned to the off position, the first engagement member 63 is moved by the cam plate 66 that turns together with the inner cylinder 27 to the off position. 9, the fitting portion 63b rides on the outer periphery of the cam plate 66 and contacts and engages with the first locking portion 79, as shown in FIG. The tip part pushes up the interlocking member 60 against the spring force of the return spring 61 and retracts to the window 78 side. Thus, the interlocking member 60 is connected to the second locking member 84 by the distal end of the engaging portion 63c retracting toward the window 78 and releasing the engagement with the first locking member 79. In this state, the shutter plate 34 is held in the open position by the second engagement member 64.

  When the cam plate 66 is rotated together with the inner cylinder 27 to the ON position by the mechanical key 33 inserted into the key hole 28, the fitting portion 63b of the first engagement member 63 is placed on the outer periphery of the cam plate 66 as shown in FIG. The second engagement member 64 is in a state of being in contact with the engagement portion 64c and being in contact with the outer periphery of the cam plate 66 while the engagement portion 64c is engaged with the second locking portion 84. Become.

  When the mechanical key 33 inserted into the key hole 28 is used to return the cam plate 66 to the lock position together with the inner cylinder 27 and the mechanical key 33 is removed, the state shown in FIG. The second recess 76 corresponds to the position corresponding to the fitting portion 64 b, and the second engagement member 64 presses the push plate 67 inward in the radial direction of the cam plate 66 by the spring force of the coil spring 85. The engagement with the second recess 76 is released, the engagement of the engagement portion 64 c of the second engagement member 64 with the second locking portion 84 is released, and the shutter plate 34 is closed by the spring force of the return spring 61. It will automatically return to the position. At this time, the first engaging member 63 is in a position where the fitting portion 63b is fitted into the first recess 75, and the torsion spring 80 is moved in response to the shutter plate 34 and the interlocking member 60 returning to the closed position. The fitting portion 63b is fitted into the first recess 75 by the spring force, and the engaging portion 63c is rotated so as to contact the side surface of the interlocking member 60.

  Thus, the cam means 65 engages the first engagement member 63 with the interlocking member 60 from the closed position side in response to the operation of the shutter plate 34 from the closed position to the open position, and mechanically connects the key hole 28 to the key hole 28. The second engagement member 64 is engaged with the interlocking member 60 from the closed position side according to the insertion of the key 33, and the first engagement is performed according to the turning operation to the ON position by the mechanical key 33 inserted into the key hole 28. The engagement of the combined member 63 with the interlocking member 60 is released, and the engagement of the second engagement member 64 with the interlocking member 60 is released in response to the mechanical key 33 being pulled out of the key hole 28 in the locked position. become.

  When the mechanical key 33 inserted into the key hole 28 is used to return the cam plate 66 to the off position together with the inner cylinder 27 and the mechanical key 33 is extracted, the second engagement member 64 is engaged with the interlocking member 60. As shown in FIG. 11, the shutter plate 34 does not automatically return to the closed position, and the open position of the shutter plate 34 is maintained. At this time, the shutter plate 34 is held by the magnet key 37 of the magnet lock 36. When 34 is rotated to the closed position, the interlocking member 60 biased by the return spring 61 abuts and engages the shutter plate 34 from the open position side so as to bias the shutter plate 34 to the closed position side. Therefore, the shutter plate 34 returns to the closed position while leaving the interlocking member 60 engaged with the second engagement member 64 left behind. That.

  The third engagement member 90 that holds the open position of the shutter plate 34 by engaging the interlocking member 60 with the shutter plate 34 in the open position engages with the interlocking member 60 and its engagement. It is supported by the casing 22 so that it can be moved between the positions where the engagement is released.

  The third engagement member 90 is in a state where the inner cylinder 27 of the cylinder lock 20 is rotated to any of the locked position, the off position, and the on position by the operation of the mechanical key 33 inserted into the key hole 28. Even so, the shutter plate 34 can be engaged with the interlocking member 60 in a state of being in the open position, and extends long in a direction orthogonal to the operating direction 58 of the shutter plate 34 and the interlocking member 60. It is formed and supported on the casing 22 so as to be movable in its longitudinal direction.

  In the case member 23 of the casing 22, a guide groove 91 having one end connected to the guide groove 59 on the side opposite to the second engagement member 64 extends in a direction orthogonal to the guide groove 59. Provided. On the other hand, the interlocking member 60 is provided with a locking recess 92 that faces one end of the guide groove 91 when the interlocking member 60 moves to the open position, and the third engaging member 90 has an inner end. As shown in FIG. 12, the outer end portion of the third engagement member 90 is formed in the casing 22 so as to be slidably fitted into the guide groove 91. The cover member 24 protrudes outward from an opening 89 provided in the side wall 24a.

  Click between the case member 23 and the third engagement member 90 is selectively elastically engaged with click recesses 93 and 94 provided at two positions spaced apart in the longitudinal direction of the third engagement member 90. A click mechanism 97 having a ball 95 and a click spring 96 that exerts a spring force that urges the click ball 95 toward the third engagement member 90 and is contracted between the click ball 95 and the case member 23. A click feeling can be obtained by the click mechanism 97 when the third engaging member 90 is slid between the position where the interlocking member 60 is engaged and the position where the engagement is released.

  In addition, an inclined surface 60c is formed in a portion facing the guide groove 91 side at the open position side end portion of the interlocking member 60, and on the closed position side of the inner end portion of the third engagement member 90. An inclined surface 90a inclined corresponding to the inclined surface 60c is formed at the facing portion. Thus, even if the third engagement member 90 is erroneously operated while the shutter plate 34 is in the closed position and the inner end portion of the third engagement member 90 protrudes into the guide groove 59, When the shutter plate 34 and the interlocking member 60 are operated from the closed position to the open position, the inclined surface 60c of the interlocking member 60 comes into contact with the inclined surface 90a of the third engaging member 90, so that the third engagement is achieved. The member 90 is pushed outward, and the shutter plate 34 and the interlocking member 60 can be operated from the closed position to the open position.

  Further, an operation portion 90b is integrally connected to the outer end portion of the third engagement member 90, and the third engagement member 90 can be operated by grasping the operation portion 90b. Thus, the operation portion 90b is formed by bending a part of the third engagement member 90 at a right angle toward the front side or the rear side of the casing 22, and is easy to grasp and operate. .

  As shown in FIG. 12, a stepped portion 90 c facing the inner surface of the side wall 24 a provided on the outer peripheral portion of the cover member 24 is formed on the surface of the third engaging member 90 facing the cover member 24 of the casing 22. The third engagement member 90 is prevented from being detached from the casing 22 when the stepped portion 90c abuts against the side wall 24a.

  Next, the operation of this embodiment will be described. When the magnetic lock 35 is unlocked and the shutter plate 34 is operated from the closed position to the open position, the first engaging member 63 is connected to the interlocking member 60 that operates together with the shutter plate 34. Is engaged from the closed position side, and the second engagement member 64 is engaged with the interlocking member 60 from the closed position side by inserting the mechanical key 33 into the key hole 28, and the mechanical key 33 is turned to the ON position. Although the engagement of the first engagement member 63 with the interlocking member 60 is released according to the operation, the second engagement member 64 remains engaged with the interlocking member 60, so that the mechanical key 33 is inserted into the key hole 28. As long as it is inserted, the shutter plate 34 is held in the open position.

  Further, when the mechanical key 33 is pulled out from the key hole 28 in the locked position, the engagement of the second engagement member 64 with the interlocking member 60 is released, so that the shutter plate 34 is moved from the open position by the elastic force of the return spring 61. It will automatically return to the closed position. That is, the shutter plate 34 automatically returns to the closed position in response to the mechanical key 33 being pulled out at the locked position during long parking, so that the operability can be improved and the anti-theft performance can be improved without forgetting to close. . On the other hand, when the mechanical key 33 inserted into the key hole 28 is pulled out in the off position, such as when parking for a short time, the engagement state of the second engagement member 64 to the interlocking member 60 is maintained. Since the shutter plate 34 does not automatically return to the closed position in the off position, the operability is improved by not closing the shutter plate 34 when the necessity to close the shutter plate 34 is low, such as when parking for a short time. Can do.

  In addition, the first and second engaging members 63, 64, the cam means 65 for operating the first and second engaging members 63, 64, and the return spring 61 for biasing the shutter plate 34 toward the closed position side, Since the casing 22 is accommodated in the casing 22 so as to operate along a plane orthogonal to the axis of the key hole 28, the casing 22 can be configured compactly in the direction along the axis of the key hole 28. The length of 33 can also be shortened.

  Further, a third engagement member 90 is supported on the casing 22 so as to enable a movement operation between a position where the interlocking member 60 in the open position is engaged with the locking recess 92 and a position where the engagement is released. When the third engaging member 90 is operated so as to engage with the engaging recess 92 of the interlocking member 60 in the open position, as shown in FIG. 13, even if the mechanical key 33 is pulled out in the locked position, the shutter The plate 34 remains in the open position, and does not automatically return to the closed position. When necessary, the automatic movement of the shutter plate 34 to the closed position does not occur, thereby improving convenience. it can.

  As another embodiment of the present invention, the interlocking member 60 used in the above embodiment is omitted, and the first and second engaging members 63 and 64 are directly engaged with the shutter plate 34. Is also possible.

  In addition, the present invention can be applied to a configuration in which the cam means is configured to release the engagement of the first and second engaging members with the shutter plate or the interlocking member in accordance with the drawing of the mechanical key 33 in the off position. is there.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. It is.

It is a front view of the protection device of a cylinder lock in the state where the key hole in a lock position was closed with a shutter board. FIG. 2 is a sectional view taken along line 2-2 of FIG. It is a disassembled perspective view of the protection device of a cylinder lock. It is a partially cutaway side view of a mechanical key and a magnet key. FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 2 in a state where the shutter plate is in the closed position. FIG. 6 is a cross-sectional view taken along line 6-6 in FIG. 2 in a state where the shutter plate is in an open position. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 2 in a state where the shutter plate is in the open position and the key hole is in the locked position. It is sectional drawing corresponding to FIG. 7 in the state which inserted the mechanical key in the key hole in a locked position. FIG. 8 is a cross-sectional view corresponding to FIG. 7 when the mechanical key is turned to the off position. FIG. 8 is a cross-sectional view corresponding to FIG. 7 when the mechanical key is turned to the ON position. It is sectional drawing corresponding to FIG. 7 of the state which extracted the mechanical key in the OFF position. FIG. 12 is a cross-sectional view taken along line 12-12 of FIG. It is sectional drawing corresponding to FIG. 6 when a mechanical key is extracted in the state which engaged the 3rd engagement member with the interlocking member.

Explanation of symbols

20 ... Cylinder lock 21 ... Cylinder body 22 ... Casing 27 ... Inner cylinder 28 ... Key hole 29 ... Insertion hole 33 ... Mechanical key 34 ... Shutter plate 35 ...・ Magnetic lock 60... Interlocking member 61... Return spring 63 that is an elastic means .first engaging member 64... Second engaging member 65. Engagement member

Claims (1)

  A casing (29) having an insertion hole (29) corresponding to a key hole (28) provided in an inner cylinder (27) provided in the cylinder lock (20) and fixed to the cylinder body (21) of the cylinder lock (20). 22) and a closed position for closing the insertion hole (29) and an open position for opening the insertion hole (29), and it is possible to operate along a plane perpendicular to the axis of the key hole (28). The shutter plate (34) supported by the casing (22) and the shutter plate (34) are held in the closed position when locked, and the shutter plate (34) is moved from the closed position to the open position when unlocked. A magnetic lock (35) that can be operated, and the shutter plate (3) according to the mechanical key (33) being pulled out from the key hole (28). ) In the cylinder lock protection device that automatically returns from the open position to the closed position, the shutter plate (34) or an interlocking member (60) that operates in conjunction with the shutter plate (34); A resilient means (61) provided between the casings (22) for urging the shutter plate (34) toward the closed position, and the shutter plate on the shutter plate (34) or the interlocking member (60). First and second engaging members (63, 64) that can automatically engage in accordance with the operation of (34) from the closed position to the open position to hold the shutter plate (34) in the open position. And a movable operation between the position where the shutter plate (34) or the interlocking member (60) in the open position is engaged and the position where the engagement is released is enabled. The third engagement member (90) supported by the ring (22), the operation of the shutter plate (34), the insertion / removal of the mechanical key (33) with respect to the key hole (28), and the mechanical key (33) Cam means (65) that actuates the first and second engaging members (63, 64) in response to the pivoting operation by the cam means (65) from the closed position of the shutter plate (34). The first engagement member (63) is engaged with the shutter plate (34) or the interlocking member (60) from the closed position side according to the operation to the open position, and the key hole ( 28) The second engagement member (64) is engaged with the shutter plate (34) or the interlocking member (60) from the closed position side in response to the insertion of the mechanical key (33) into the key hole. Insert in (28) The engagement of the first engagement member (63) with the shutter plate (34) or the interlocking member (60) is released in response to the turning operation to the ON position by the mechanical key (33), The engagement of the second engagement member (64) to the shutter plate (34) or the interlocking member (60) in response to the mechanical key (33) being pulled out from the key hole (28) at the key insertion / removal position. Cylinder lock protective device characterized by releasing the engagement.

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