JP6150342B2 - Cylinder lock protector - Google Patents

Description

  According to the present invention, in a casing having a mechanical key insertion hole for inserting a mechanical key into a cylinder lock, the shutter plate moves between a closed position for closing the mechanical key insertion hole and an open position for opening the mechanical key insertion hole. The present invention relates to a protection device for a cylinder lock that can be accommodated.

  Such a cylinder lock protection device is known, for example, from Patent Document 1.

Japanese Patent No. 3914043

  However, in the one disclosed in Patent Document 1, the shutter key is moved from the closed position to the open position by rotating the magnet key while the magnet key is fitted to the magnet lock and unlocked. The shutter plate is opened manually by manual operation. To open the shutter plate automatically, it is possible to spring-bias the shutter plate toward the open position, but simply by spring-biasing the shutter plate toward the open position side closes the shutter plate to the closed position side. It must be moved manually, and is not easy to operate.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a protection device for a cylinder lock with improved operability by automatically moving a shutter plate between a closed position and an open position. .

  To achieve the above object, the present invention provides a casing having a mechanical key insertion hole for inserting a mechanical key into a cylinder lock, a shutter plate having a closed position for closing the mechanical key insertion hole, and the mechanical key insertion hole. In a cylinder lock protection device that is accommodated so as to be able to move between open positions that open the shutter, a restriction state that restricts the shutter plate to the closed position and a restriction that allows the shutter plate to operate to the open position Closed position restricting means capable of switching the release state, restricted state releasing means capable of releasing the restricted state of the closed position restricting means to enter the restricted release state, and the opening direction for biasing the shutter plate toward the open position side Biasing means, and the shutter plate with a biasing force larger than the biasing direction biasing means directed toward the closed position A closing direction biasing means capable of exerting, a closing direction biasing means capable of biasing the shutter plate toward the closing position with a biasing force larger than the opening direction biasing means, and at least When the shutter plate is operated from the closed position to the open position, the function of the closing direction urging means is stopped and the mechanical key is pulled out from the mechanical key insertion hole at a predetermined rotation position. A closing position-side biasing force control means for controlling transmission of the biasing force from the closing direction biasing means to the shutter plate so that a biasing force acts on the shutter plate from the closing direction biasing means. One feature.

  According to the present invention, in addition to the configuration of the first feature, the restriction state release means includes a magnet lock that is unlocked by a magnet key, and according to a predetermined operation of the magnet key in the unlocked state. A second feature is that it is configured to operate and release the restriction state of the closing position restriction means.

  According to the first feature of the present invention, when the restricted state releasing means releases the restricted state by the closed position restricting means, the closing position side biasing force control means sets the closing direction when the shutter plate is operated from the closed position to the open position. Since the function of the urging means is stopped, the shutter plate automatically operates from the closed position to the open position by the urging force applied from the opening direction urging means. When the mechanical key inserted into the cylinder lock side from the mechanical key insertion hole with the shutter plate in the open position is pulled out from the mechanical key insertion hole at the predetermined rotation position, the closing position side biasing force control means By allowing the closing direction urging means to exert an urging force on the shutter plate from the closing direction urging means that exerts a larger urging force than the urging means, the urging force from the closing direction urging means reaches the shutter plate, so that the shutter plate Is automatically actuated to the closed position, and the shutter plate is automatically moved between the closed position and the open position, so that the operability can be improved.

  According to the second aspect of the present invention, the restriction state of the closing position restriction means is released by a predetermined operation of the magnet key in the unlocked state of the magnet key for unlocking the magnetic lock included in the restriction state release means. Therefore, the restriction state of the closing position restricting means can be released by a simple operation using the magnet key.

It is a perspective view of a cylinder lock and a protection device. It is a disassembled perspective view of a mechanical key and a magnet key. It is a disassembled perspective view of a protective device. It is a front view of the protection device which omits the cover member and shows the shutter plate in the open position. It is a front view in the state where the shutter board was removed from FIG. It is a front view in the state where the inner cover board was removed from FIG. It is a perspective view of the shutter plate seen from the side opposite to the cover member. It is a front view of the protection device which omits the casing and shows the shutter plate in the closed position. It is a perspective view of the protection device which omits the casing and shows the shutter plate in the closed position. FIG. 10 is a view taken in the direction of arrow 10 in FIG. 8. It is a perspective view for showing the connection composition of a magnet lock, a slide case, and the 2nd control member. It is the side view which looked at the body of the casing from the 12 arrow direction of FIG. It is a disassembled perspective view of a follower piece and a slide member. FIG. 9 is a front view of the protection device corresponding to FIG. 8 with a mechanical key inserted in a locked position. FIG. 9 is a front view corresponding to FIG. 8 in a state where the mechanical key is turned to the off position. FIG. 16 is a view taken along arrow 16 in FIG. 15 with the casing omitted. FIG. 9 is a front view corresponding to FIG. 8 in a state where the mechanical key is turned to the ON position. It is a front view corresponding to Drawing 8 in the state where a mechanical key was extracted at a lock position.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 18 attached. First, in FIG. 1, switching of the switching mode of the ignition switch 21 and switching of the locked state and unlocked state of the steering are possible. As described above, a protective device 24 is attached to a cylinder body 23 of a cylinder lock 22 used in a vehicle such as a motorcycle.

  In FIG. 2, the mechanical key 25 for unlocking the cylinder lock 22 is housed in a carrying case 26 extending in a straight line with a rectangular cross section, and as shown in FIG. The portable case 26 is supported at one end of the portable case 26 so that the state of the portable case 26 can be switched, and a magnet key 27 is provided at the other end of the portable case 26.

  On the side surface of the other end portion of the carrying case 26, a square recess 28, a circular protrusion 29 disposed at the center of the recess 28, and a periphery of the circular protrusion 29 in the recess 28. Four receiving recesses 30 are formed, and the circular protrusions 29 are fitted in the state in which the magnets 31 are respectively received in the three receiving recesses 30 selected from the four receiving recesses 30. The magnet key 27 is configured by fitting and adhering a lid member 33 having a circular hole 32 at the center to the recess 28. Moreover, the magnet 31 is housed in the housing recess 30 so that one of the N pole and the S pole faces the outer end side of the housing recess 30.

  3 to 6, the protection device 24 includes a casing 35 that covers one end of the cylinder body 23, and a shutter plate 36 that is accommodated in the casing 35.

  The casing 35 having a mechanical key insertion hole 37 for inserting the mechanical key 25 into the cylinder lock 22 includes a body 38 to which the cylinder body 23 is coupled, and the body 38 opposite to the cylinder body 23. The cover member 39 is fastened to the body 38 so as to be covered with the cover 38 and the inner cover plate 40 is fastened to the body 38 so as to be covered with the cover member 39.

  By the way, the mechanical key 25 inserted into the cylinder lock 22 can be turned from a lock (LOCK) position, which locks a steering handle (not shown), to an ON position via an OFF position. Yes, the ignition switch 21 is turned on at the ON position to ignite an engine (not shown). The mechanical key 25 can be inserted into and removed from the cylinder lock 22 in either the locked position or the off position.

  A cover sheet 41 having an opening 42 corresponding to the mechanical key insertion hole 37 is affixed to the surface of the cover member 39, and each position of LOCK, OFF, and ON is positioned on the cover sheet 41. It is displayed so as to be arranged around the opening 42.

  The casing 35 accommodates the shutter plate 36 so as to be operable between a closed position for closing the mechanical key insertion hole 37 and an open position for opening the mechanical key insertion hole 37 (position shown in FIG. 4). The shutter plate 36 is disposed between the cover member 39 and the inner cover plate 40.

  The cover member 39 covers the body 38 so as to fit a part of the body 38 opposite to the cylinder lock 22 and is formed in a substantially rectangular bowl shape. Boss portions 39a are integrally formed at a plurality of, for example, three locations spaced apart in the circumferential direction of the peripheral portion of the cover member 39. On the other hand, the body 38 is integrally formed with a plurality of, for example, three support portions 38a that are in contact with the boss portions 39a. The screw member 43 is inserted into the support portion 38a from the cylinder lock 22 side. Is screwed into the boss 39a, whereby the cover member 39 is fastened to the body 38.

  The inner cover plate 40 is fixed to the body 38 so that the shutter plate 36 is in sliding contact. The inner cover plate 40 positioned and engaged with the body 38 at a plurality of locations is Two screw members 44 are fastened to the body 38.

  The mechanical key insertion hole 37 includes a circular first hole 45 provided in the inner cover plate 40 and a circular second hole 46 provided in the cover member 39 corresponding to the first hole 45. The shutter plate 36 is interposed between the first hole 45 and the second hole 46 to close the mechanical key insertion hole 37.

  Referring to FIG. 7, the shutter plate 36 is formed in a fan shape and has a rotation base 36 a having a circular support hole 47 at a position corresponding to the main part of the fan, and a radial direction of the support hole 47. A connecting arm portion 36b extending from the rotation base portion 36a along the lid, a lid portion 36c having a shape capable of closing the mechanical key insertion hole 37, and being connected to the coupling arm portion 36b, and the lid portion 36c. When the mechanical key insertion hole 37 is in an open state, a regulating arm portion 36d extending from the lid portion 36c so as to sandwich the mechanical key insertion hole 37 with the rotation base portion 36a is integrally provided. Formed as follows.

  The shutter plate 36 can be operated between a closed position for closing the mechanical key insertion hole 37 and an open position for opening the mechanical key insertion hole 37 (position shown in FIG. 4). It is rotatably supported by a support shaft 48 inserted into the shaft.

  A locking projection 49 extending in an arc shape around the central axis of the support hole 47 and the support shaft 48 is integrally provided on the surface of the rotation base 36a facing the inner cover plate 40, An operation shaft 50 is integrally projected on the surface of the rotation base 36 a facing the cover member 39, and insertion holes 51 and 52 through which the operation shaft 50 is inserted are the centers of the support hole 47 and the support shaft 48. The cover member 39 and the cover sheet 41 are provided on the cover member 39 so as to be formed in an arc shape centered on the axis.

  Further, on the surface facing the inner cover plate 40 side of the distal end portion of the restricting arm portion 36d, the inner cover plate 40 extends from the engaging recess portion 53 toward the distal end side of the restricting arm portion 36d. An inclined surface 54 that is inclined so as to be away from the center is formed.

  The closing position of the shutter plate 36 is restricted by a closing position restricting means 56. The closing position restricting means 56 includes a restricting state in which the shutter plate 36 is restricted to the closing position, and the shutter plate 36. It is possible to switch between a restriction release state that allows operation to the open position, and includes first and second restriction members 57 and 58.

  Referring also to FIGS. 8 to 10, the first restricting member 57 is provided on the plate-like rotating plate portion 57 a disposed between the body 38 and the inner cover plate 40 and the inner cover plate 40. The support shaft 48 erected on the rotating plate portion 57 a so as to pass through the formed first through hole 59 and to be inserted into the support hole 47 of the shutter plate 36, and the shutter plate 36. A first engaging protrusion 57b that is erected on the rotating plate part 57a so as to be able to contact and engage with one end 49a in the circumferential direction of the locking protrusion 49, and coaxial with the support shaft 48. A cylindrical portion 57c that is connected to the rotating plate portion 57a at a right angle and is rotatably inserted into the body 38, and a first pressure receiving member that protrudes radially outward from an axially intermediate portion of the cylindrical portion 57c. The inner cover plate is formed to have a protrusion 57d. In the case of 0, a long hole 60 through which the first engagement protrusion 57b can be rotated around the center axis of the support shaft 48 and the first engagement protrusion 57b is inserted is provided on the center axis of the support shaft 48. Is provided so as to extend in an arc shape with respect to the center.

  The second restricting member 58 is capable of engaging the flat connecting plate portion 58 a disposed between the body 38 and the inner cover plate 40 and the locking recess 53, while allowing the inner cover plate 40 to be engaged. A second engaging projection 58b projecting from one end of the coupling plate 58a so as to pass through the second through-hole 61 provided in the coupling plate 58, and extending in parallel with the support shaft 48. The rod portion 58c is inserted into the body 38 from the other end of the plate portion 58a, and the second pressure receiving protrusion 58d protrudes radially outward from the rod portion 58c.

  The shutter plate 36 is urged toward the opening position by a coil-shaped first torsion spring 62 that is an opening direction urging means, and the first torsion spring 62 rotates the shutter plate 36. Between the base portion 36 a and the inner cover plate 40, it is arranged so as to surround the support shaft 48, and one end portion 62 a of the first torsion spring 62 is engaged with the inner cover plate 40, and other than the first torsion spring 62. The end 62b is brought into contact with and engaged with the other circumferential end 49b of the locking projection 49 in the shutter plate 36.

  Further, a biasing force toward the closed position side is exerted on the shutter plate 36 by a coiled second torsion spring 63 which is a closing direction biasing means that exerts a biasing force larger than that of the first torsion spring 62. Is possible. The second torsion spring 63 is provided between the cylindrical portion 57c and the body 38 so that a part of the second torsion spring 63 is inserted into the cylindrical portion 57c. The other end portion of the second torsion spring 63 is engaged with the body 38 and is engaged with a groove (not shown) formed in the inner surface of the cylindrical portion 57c extending in the axial direction.

  The second torsion spring 63 includes the first restricting member 57 in a state where the first engaging protrusion 57b of the first restricting member 57 is in contact with the circumferential end 49a of the engaging protrusion 49 of the shutter plate 36. At the same time, it exerts a spring force that urges the shutter plate 36 toward the closed position, and urges the first restricting member 57 in a direction in which the rotating plate portion 57a approaches the inner cover plate 40. Axial spring force is also exerted.

  The spring force of the second torsion spring 63 that biases the shutter plate 36 toward the closed position is larger than the spring force of the first torsion spring 62 that biases the shutter plate 36 toward the open position. In the state where the first engaging protrusion 57b of the first restricting member 57 is in contact with the circumferential end 49a of the locking protrusion 49 of the shutter plate 36, the shutter plate 36 in the closed position is on the opening position side. Therefore, the shutter plate 36 is restricted at the closed position.

  A first coil spring 64 is contracted between the rod-shaped portion 58c of the second restricting member 58 and the body 38, and the second restricting force is exerted by the spring force exerted by the first coil spring 64. The member 58 is biased toward the side where the second engagement protrusion 58b protrudes from the inner cover plate 40, and the second engagement protrusion 58b engages with the locking recess 53 of the shutter plate 36. This also restricts the shutter plate 36 at the closed position.

  The restricted state of the shutter plate 36 at the closed position by the closed position restricting means 56 can be released by the restricted state releasing means 65, and the restricted state releasing means 65 is unlocked by the magnet key 27. This embodiment includes a magnetic lock 66, and is configured to operate in response to a predetermined operation of the magnet key 27 in the unlocked state of the magnet lock 66 to release the restricted state of the closing position restricting means 56. In the embodiment, the predetermined operation of the magnet key 27 is a pushing operation.

  By the way, the body 38 of the casing 35 has a slide support hole 67 that opens to the cover member 39 side at a portion offset from the inner cover plate 40 and extends in parallel with the central axis of the support shaft 48 and is substantially rectangular. It is provided so as to have a cross-sectional shape. At the end of the slide support hole 67 opposite to the cover member 39, a receiving portion 68 (see FIG. 12) formed in a lattice shape for removing dust and water that has entered the slide support hole 67 is disposed. The receiving portion 68 is formed integrally with the body 38. The cover member 39 is provided with a first magnet key insertion hole 69 formed in a substantially rectangular shape corresponding to the slide support hole 67. As shown in FIG. 3, a cover member 70 for closing the first magnet key insertion hole 69 is rotatably supported on the back surface of the cover member 39 via a pin 71. The cover member 70 is a spring. 72 is biased to the closing side.

  Referring also to FIG. 11, the magnet lock 66 includes a rotor 74 that is rotatably supported by the body 38 of the casing 35. The rotor 74 includes a disc portion 74a and a disc portion 74a. A flange portion 74b projecting radially outward from one end, a connecting arm portion 74c extending outward from one circumferential direction of the flange portion 74b, and the same side as the disk portion 74a from the outer end of the connecting arm portion 74c And a third engaging protrusion 74d that protrudes integrally with each other and is formed of a nonmagnetic material.

  As shown in FIG. 12, the body 38 of the casing 35 is fitted with a fitting recess 75 for rotatably fitting the flange 74 b and the connecting arm portion 74 c of the rotor 74, and the fitting recess 75. A circular fitting hole 76 for opening the outer end and opening the inner end on the side surface of the slide support hole 67 to fit the disk portion 74a of the rotor 74 so as to be rotatable, and the third engagement. A long hole 77 having an outer end opened in the fitting recess 75 and an inner end opened in the side surface of the slide support hole 67 so that the protrusion 74d is inserted is provided. Is formed in an arc shape around the rotation axis of the rotor 74 so as to allow the rotation of the rotor 74 in the fitting recess 75 and the fitting hole 76.

  As shown in FIG. 3, the fitting recess 75 integrally includes a support protrusion 78 a that fits into the disk portion 74 a of the rotor 74 and supports the rotation of the rotor 74, and one screw member. 79 is closed by a lid member 78 fastened to the body 38, and an O-ring 80 is interposed between the base of the support protrusion 78 a and the rotor 74.

  A plurality of, for example, three pins 81 made of magnets are engaged with three of the four locking recesses 82 provided at one end of the disk portion 74a of the rotor 74 at the tip of the support protrusion 78a. The pin 81 is engaged with the rotor 74 by a second coil spring 83 corresponding to the pin 81 individually. It is energized to the side.

  The three pins 81 are arranged at positions corresponding to the three magnets 31 included in the magnet key 27 when the magnet key 27 is arranged opposite to the other end of the disk portion 74a of the rotor 74. Thus, the engaging recess 82 is fitted. Moreover, the pin 81 is arranged such that the same pole as the pole on the magnet lock 66 side of the magnet 31 in the magnet key 27 is arranged on the inner end side of the locking recess 82. By disposing the regular magnet key 27 at a position facing the other end of the disk portion 74a, the pin 81 is disengaged from the rotor 74 against the elastic biasing force of the second coil spring 83. The rotor 74 is allowed to rotate.

  In the slide support hole 67 of the body 38 in the casing 35, a slide case 84 that moves together with the magnet key 27 in accordance with the insertion of the magnet key 27 into the casing 35 is slidably accommodated.

  The slide case 84 is formed in a rectangular box shape so as to be provided with a second magnet key insertion hole 85 having a bottomed and rectangular cross-sectional shape. The magnet key 27 is inserted into the magnet key insertion hole 85 together with the portable case 26 from the first magnet key insertion hole 69 of the cover member 39 with the lid member 70 being opened.

  A tip end portion of the carrying case 26 that is inserted into the second magnet key insertion hole 85 together with the magnet key 27 is in contact with a closed end wall of the second magnet key insertion hole 85, and By pushing the magnet key 27 together with the portable case 26, the slide case 84 slides in the slide support hole 67. Moreover, a third coil spring 86 is contracted between the slide case 84 and the receiving portion 68 provided at the end of the slide support hole 67 on the side opposite to the cover member 39. The slide case 84 is biased toward the side close to the cover member 39 by the spring force exerted by the third coil spring 86.

  On the side wall of the slide case 84 facing the magnet lock 66 side, a window 87 for allowing the magnet key 27 inserted into the second magnet key insertion hole 85 to face the magnet lock 66 side is formed in the slide support hole 67. The slide case 84 is moved along with the magnet key 27 in accordance with the insertion of the magnet key 27 so that the outer surface of the closed end of the rotor 74 in the magnet lock 66 is formed. When the magnet key 27 is opposed to the magnet key 27, not only can the magnet key 27 be inserted up to the unlock position where the magnet lock 66 is unlocked, but the magnet key 27 is further pushed in from the unlock position. It is possible to move to the push-in position.

  The slide case 84 has a movable engagement member 88 engaged with the third engagement protrusion 74d of the rotor 74 while the movement of the rotor 74 is restricted when the magnet lock 66 is locked. A fourth coil spring that is held and exerts a resilient force that presses the movable engagement member 88 to the side that rotationally drives the rotor 74 in accordance with the movement of the slide case 84 toward the push-in position. 89 is provided between the slide case 84 and the movable engagement member 88.

  The movable engagement member 88 has a locking groove 90 for engaging the third engagement arm portion 74d, and is formed in a substantially C-shape that is open to the connecting arm portion 74c side of the rotor 74. In addition, in the slide case 84, an accommodation hole 91 that opens on the second regulating member 58 side and the third engagement arm portion 74d side of the rotor 74 closes both ends of the slide support hole 67 in the extending direction. The movable engagement member 88 is accommodated in the accommodation hole 91, and the fourth coil spring 89 accommodated in the accommodation hole 91 includes the slide case 84 and the movable engagement member. The joint member 88 is contracted.

  When the magnet key 27 and the slide case 84 are further pushed in from the unlocked position, the pressing force due to the movement of the slide case 84 causes the connecting arm of the rotor 74 via the fourth coil spring 89 and the movable engagement member 88. The rotor 74, which is transmitted to the portion 74c and is rotatable when the magnet lock 66 is in the unlocked state, rotates according to the movement of the movable engagement member 88.

  The slide case 84 is provided with a first pressing protrusion 84a that can be engaged with the first pressure receiving protrusion 57d provided on the cylindrical portion 57c of the first restricting member 57 from the rotation base 36a side. The slide case 84 in which the first pressing protrusion 84a is engaged with the first pressure receiving protrusion 57d further from the unlocked position when the slide key 84 is pushed by the magnet key 27. When pushed, the first restricting member 57 is pushed down against the axial elastic force of the second torsion spring 63, so that the first engaging protrusion 57 b of the first restricting member 57 is moved to the shutter plate 36. Thus, the first restricting member 57 that restricts the shutter plate 36 at the closed position is released. At this time, the support shaft 48 of the first restricting member 57 is not detached from the support hole 47 of the shutter plate 36, and the rotation support of the shutter plate 36 by the support shaft 48 is maintained.

  The movable engagement member 88 has a second pressing projection 88a that can be engaged from the connecting plate portion 58a side with a second pressure receiving projection 58d provided on the rod-shaped portion 58c of the second regulating member 58. It is provided so as to protrude from the movable engagement member 88 on the side opposite to the locking groove 90, and the second pressure receiving protrusion 58 d has a second one when the slide case 84 is pushed in by the magnet key 27. When the slide case 84 engaged with the two pressing protrusions 88a is further pushed in from the unlocked position, the second engaging protrusions 58b of the second restricting member 58 are engaged with the locking recesses 53 of the shutter plate 36. The second restriction member 58 that restricts the shutter plate 36 at the closed position is also released. If the slide case 84 is forcibly pushed in with a different key or an unauthorized member while the magnetic lock 66 is not unlocked, the first restricting member 57 restricts the shutter plate 36 at the closed position according to the movement of the slide case 84. Although released, the rotor 74 of the magnet lock 66 does not rotate, and the movement of the movable engagement member 88 is also prevented, so that the slide case 84 compresses the fourth coil spring 89. Thus, the second restricting member 58 does not release the restriction at the closed position of the shutter plate 36, and the shutter plate 36 remains restricted at the closed position.

  That is, the restriction state release means 65 includes the magnet lock 66, the slide case 84, the movable engagement member 88, and the third and fourth coil springs 86 and 89.

  The spring force of the second torsion spring 63 is applied to the shutter plate 36 in a state where the restriction state of the closing position restriction means 56 that restricts the shutter plate 36 to the closing position is released by the restriction state release means 65 described above. The shutter plate 36 does not act, and automatically rotates to the open position side by the spring force of the first torsion spring 62 as shown in FIG.

  At this time, the locking projection 49 of the shutter plate 36 is positioned close to and opposed to the first engagement projection 57 b of the first restricting member 57 in the direction along the axis of the support shaft 48, so that the slide case 84 By pulling out the magnet key 27, the slide case 84 is returned to its original position by the spring force of the third coil spring 86, so that the pressing force acting on the first pressure receiving protrusion 57d from the first pressing protrusion 84a is applied. Even if is released, the first restricting member 57 remains pressed down due to the first engaging protrusion 57b contacting the locking protrusion 49 of the shutter plate 36 in the axial direction. The second restricting member 58 returns to the original position by the spring force of the first coil spring 64 by releasing the pressing force acting on the second pressure receiving protrusion 58d from the second pressing protrusion 88a.

  The transmission of the urging force from the second torsion spring 63 to the shutter plate 36 is controlled by the closed position side urging force control means 94, and this closed position side urging force control means 94 is at least of the shutter plate 36. During operation from the closed position to the open position, the function of the first torsion spring 62 is stopped, and the mechanical key is inserted at a predetermined rotational position of the mechanical key 25 with the shutter plate 36 in the open position. A biasing force of the second torsion spring 63 is applied to the shutter plate 36 in accordance with the pulling operation from the hole 37.

  Referring to FIG. 6, the closing position side urging force control means 94 includes a disc-shaped cam plate 95 rotatably accommodated between the body 38 and the inner cover plate 40, and the cam plate 95. A lever member 96 disposed on the outer side of the cam plate 95 so as to be disposed between the first and second regulating members 57 and 58 in the circumferential direction, and sliding in the radial direction of the cam plate 95. A push plate 97 fitted to the cam plate 95 as possible, a follower piece 98 which comes into contact with the push plate 97 when the cam plate 95 is in a rotational position corresponding to the lock position, and the follower piece And a slide member 99 coupled to 98.

  The cam plate 95 is connected to an inner cylinder (not shown) of the cylinder lock 22 in a relatively non-rotatable manner, and has a radius from a disc portion 95a and an end of the disc portion 95a on the body 38 side. It is formed so as to integrally have a flange portion 95b projecting outward in the direction. Moreover, the rotating plate portion 57 a of the first restricting member 57 is disposed between the flange portion 95 b and the inner cover plate 40.

  The lever member 96 makes it possible to abut one end portion 96 a of the cam plate 95 on the outer periphery of the flange portion 95 b and to contact the other end portion 96 b with the rotating plate portion 57 a of the first restricting member 57. The pin 100 is pivotally supported on the body 38 by a pin 100 parallel to the support shaft 48 so as to be in contact with the lever member 96. A recess 101 for accommodating one end of the lever member 96 when the cam plate 95 is in a rotation position corresponding to the lock position is formed on the outer periphery of the flange portion 95b, and the cam plate 95 is in the lock position. When the lever member 96 is turned to the off position or the on position, the one end portion 96a of the lever member 96 is turned away from the concave portion 101 and is brought into sliding contact with the outer periphery of the flange portion 95b. The other end portion 96b of the lever member 96 is opposed to the turning direction of the first restricting member 57 by the urging force of the second torsion spring 63, so that the turning plate portion 57a of the first restricting member 57 is opposed. Abut.

  In the central portion of the cam plate 95, a rectangular through hole 102 corresponding to the mechanical key insertion hole 37 is formed with a rectangular cross-sectional shape, an inner end is opened to the through hole 102, and an outer end is A fitting groove 103 opened on the outer periphery of the disk portion 95a is provided so as to extend in the radial direction of the cam plate 95, and the push plate 97 is slidably fitted into the fitting groove 103, and The spring 104 is provided between the cam plate 95 and the push plate 97 so as to bias the push plate 97 toward the side closing the through hole 102, that is, radially inward of the cam plate 95.

  An inner end portion of the push plate 97 is formed so as to close the through hole 102, and an outer end portion of the push plate 97 is formed in an arc shape having the same curvature as the outer periphery of the disc portion 95 a in the cam plate 95. The When the inner end portion of the push plate 97 is at a position closing the through hole 102, the outer end portion of the push plate 97 is inward of the outer periphery of the disk portion 95a, and the inner end portion of the push plate 97 is When the through hole 102 is open, the outer end of the push plate 97 is in a position that is flush with the outer periphery of the disk portion 95a.

  Referring also to FIG. 13, the follower piece 98 is disposed on the opposite side of the cam plate 95 from the second restricting member 58, and has a connecting pin 98a at one end thereof. 95, a follower piece main portion 98b that extends along the outer periphery of the cam plate 95 and can partially overlap the flange portion 95b of the cam plate 95, and the cam plate 95 from the other end of the follower piece main portion 98b. A fitting portion 98c extending toward the disk portion 95a and a short cylindrical portion 98d connected to the other end of the driven piece main portion 98b so as to be disposed outside the flange portion 95b are integrally provided. A spring locking recess 105 is formed on the side surface of the driven piece main portion 98b opposite to the fitting portion 98c.

  The tip of the fitting portion 98c can abut on the outer periphery of the disc portion 95a in the cam plate 95, and when the cam plate 95 is in the locked position, the tip of the fitting portion 98c It contacts the outer end of the plate 97.

  In addition, the other end portion 107b of the third torsion spring 107, which surrounds the supporting protrusion 106 having a circular cross section provided on the body 38 and whose one end portion 107a is engaged with the body 38, is part of the spring portion. The third torsion spring 107 exerts a spring force which is brought into contact with and engaged with a short cylindrical portion 98d at the other end of the driven piece 98 so that the driven piece 98 can be accommodated in the locking recess 105. The engaging portion 98c of 98 is pressed against the outer periphery of the disc portion 95a of the cam plate 95 and the driven piece 98 is applied to the driven piece 98 in the direction of pressing the driven piece 98 toward the first regulating member 57. In order to guide the movement of the push plate 97 and the movement of the driven piece 98 accompanying the rotation of the cam plate 95, the body 38 is fitted with the tip of the short cylindrical portion 98d of the driven piece 98. A guide recess 109 is formed.

  The slide member 99 is disposed between the follower piece 98 and the first restricting member 57, and is supported by the body 38 so as to be able to slide in the approach and separation directions with respect to the first restricting member 57. The slide member 99 is provided with a bottomed fitting hole 108 for fitting the connecting pin 98a of the driven piece 98 so as to be rotatable.

  At the end of the slide member 99 on the first restricting member 57 side, the rotating plate portion 57a of the first restricting member 57 is pivoted by the second torsion spring 63 with respect to the first restricting member 57. An abutting portion 99 a that can abut from the same direction as the biasing direction is provided integrally so as to be able to overlap the flange portion 95 b of the cam plate 95 in the axial direction.

  As shown in FIG. 6, when the shutter plate 36 is in the open position and the cam plate 95 is in the locked position, the one end portion 96 a of the lever member 96 is located on the outer periphery of the flange portion 95 b of the cam plate 95. The driven piece 98 is accommodated in the recess 101, and the fitting portion 98c is in contact with the outer end portion of the push plate 97 in a position where the through hole 102 is closed. The first engagement protrusion 57 b of the member 57 is in contact with the locking protrusion 49 of the shutter plate 36 in the direction along the axis of the support shaft 48. In this state, as shown in FIG. 14, when the mechanical key 25 is inserted into the mechanical key insertion hole 37 and the through hole 102, the fitting portion 98 c is inserted into the push plate 97 and the outer end portion of the push plate 97. The driven piece 98 abutted against is pushed outward in the radial direction of the cam plate 95 against the spring force of the spring 104 urging the push plate 97, whereby the slide member 99 is moved to the first position. 1 Slide operation to the side close to the regulating member 57.

  When the mechanical key 25 is turned from the lock position to the off position, the lever member 96 disengages its one end 96a from the recess 101 of the flange 95b of the cam plate 95 as shown in FIG. Thus, the other end portion 96b of the lever member 96 rotates the rotating plate portion 57a of the first restricting member 57 counterclockwise in FIG. Will be moved. As a result, the first restricting member 57 is in a position where the first engaging protrusion 57b can be brought into contact with and engaged with one end 49a of the locking protrusion 49 in the shutter plate 36 in the circumferential direction. In the circumferential direction of the slide case 84, the first pressing protrusion 84a of the slide case 84 is rotated to a position shifted from the first pressure receiving protrusion 57d, and the first engagement protrusion 57b is moved to the shutter plate at the lock position. In response to the release of the state of being in contact with the locking projection 49 of 36, the first restricting member 57 is rotated by the axial elastic force of the second torsion spring 63 as shown in FIG. The moving plate portion 57a is moved in the direction in which the moving plate portion 57a is brought close to the shutter plate 36, and the first engaging projection portion 57b approaches and opposes the circumferential one end portion 49a of the first locking projection portion 49 in the circumferential direction of the support shaft 48. Furthermore, with the spring force of the second torsion spring 63, the first Contact the circumferential end portion of the locking projection 49 will engage.

  At this time, if the rotation of the first restricting member 57 is permitted, the shutter plate 36 is rotated toward the closed position by the spring force of the second torsion spring 63 acting on the shutter plate 36 from the first restricting member 57. Although it is urged to move, the rotation of the first restricting member 57 is blocked by the lever member 96 and the slide member 99. That is, when the rotating plate portion 57a of the first restricting member 57 is rotated counterclockwise in FIG. 15 by the lever member 96 in the off position, a part of the rotating plate portion 57a is slid. The member 99 rotates so as to pass between the abutting part 99 a at the tip of the member 99 and the flange part 95 b of the cam plate 95, and the first restricting member 57 is elastic in the axial direction of the second torsion spring 63. By moving the rotating plate portion 57a in the direction in which the rotating plate portion 57a is brought close to the shutter plate 36 by the generated force, the contact portion 99a is first regulated by the spring force of the second torsion spring 63 as shown in FIG. The member 57 abuts on the rotating plate portion 57a so as to oppose the rotation urging direction of the member 57, and the rotation of the first restricting member 57 is prevented. The other end portion 96 b of the lever member 96 remains in contact with the rotating plate portion 57 a of the first restricting member 57, and the one end portion 96 a of the lever member 96 is in contact with the flange portion 95 b of the cam plate 95. The lever member 96 prevents the first restricting member 57 from rotating.

  When the mechanical key 25 is turned to the on position, the cam plate 95 is turned to the position shown in FIG. 17, but the lever member 96, the follower piece 98, and the slide member 99 are shown in FIGS. It does not change from the state of the off position shown, and the first restricting member 57 does not rotate.

  When the mechanical key 25 is returned to the lock position and the mechanical key 25 is pulled out, the push plate 97 of the cam plate 95 returns to the position where the through hole 102 is closed as shown in FIG. Thus, the slide member 99 returns to the position where the engagement with the first restricting member 57 is released, and the concave portion 101 on the outer periphery of the flange portion 95b of the cam plate 95 corresponds to the one end portion 96a of the lever member 96. Therefore, the first restricting member 57 can rotationally drive the lever member 96 so that one end 96a of the lever member 96 is accommodated in the recess 101, whereby the shutter plate 36 is moved to the second torsion spring. The spring force obtained by subtracting the spring force of the first torsion spring 62 from the spring force of 63 is automatically rotated to the closed position. Due to the rotation of the shutter plate 36 to the closed position, the inclined surface 54 of the distal end portion of the restricting arm portion 36d of the shutter plate 36 comes into contact with the second engaging protrusion 58b of the second restricting member 58 and is second. The restricting member 58 is pushed down against the urging force of the first coil spring 64, and the second engaging protrusion 58b of the second restricting member 58 is engaged with the locking recess 53 at the tip of the restricting arm portion 36d. Will do.

  That is, the closing position side urging force control means 94 stops the function of the first torsion spring 62 when the shutter plate 36 is operated from the closed position to the open position, and the shutter plate 36 is in the open position. The urging force of the first torsion spring 62 is applied to the shutter plate 36 in accordance with the pulling operation from the mechanical key insertion hole 37 when the mechanical key 25 is locked.

  By the way, the mechanical key 25 may be pulled out from the mechanical key insertion hole 37 in the off position. In this case, the closing position side biasing force control means 94 does not apply the biasing force of the second torsion spring 63 to the shutter plate 36. Therefore, the shutter plate 36 does not automatically rotate to the closed position side in the off position. Therefore, it is possible to rotate the shutter plate 36 to the closed position by rotating the protruding portion of the operating shaft 50 from the casing 35. At this time, the first restricting member 57 is Since the rotation is prevented by the slide member 99 and the lever member 96, the shutter plate 36 rotates with the first regulating member 57 left behind, and the shutter plate 36 is closed. Is regulated by the engagement of the second engaging protrusion 58b of the second restricting member 58 with the engaging recess 53. Further, when the shutter plate 36 is opened, the magnet key 27 is inserted into the slide case 84 and pushed down. The second restricting member 58 is pushed down so that the second engaging protrusion 53 is pushed down. 58b is disengaged and the restriction at the closed position of the shutter plate 36 by the second restricting member 58 is released, and the spring force of the second torsion spring 63 does not act on the shutter plate 36, so the shutter plate 36 Is automatically rotated to the open position by the spring force of the first torsion spring 62.

  Next, the operation of this embodiment will be described. The protective device 24 attached to the cylinder body 23 of the cylinder lock 22 is in a restricted state in which the shutter plate 36 is restricted to the closed position and to the open position of the shutter plate 36. The closing position restricting means 56 that can switch the restriction releasing state that permits the operation of the closing position, the restricting state releasing means 65 that can release the restricting state of the closing position restricting means 56 to the restriction releasing state, and the shutter plate 36. A first torsion spring 62 that urges toward the open position, and a second torsion spring 63 that can urge the shutter plate 36 toward the close position with a greater urging force than the first torsion spring 62; The function of the second torsion spring 63 is stopped at least when the shutter plate 36 is operated from the closed position to the open position. The urging force is applied to the shutter plate 36 from the second torsion spring 63 in response to the pulling operation from the mechanical key insertion hole 37 at the predetermined rotation position (lock position) of the mechanical key 25. And a closed position side biasing force control means 94 for controlling the biasing force transmission from the two torsion springs 63 to the shutter plate 36.

  Therefore, when the restriction state release means 65 releases the restriction state by the closing position restriction means 56, the function of the second torsion spring 63 is performed by the closing position side biasing force control means 94 when the shutter plate 36 is operated from the closing position to the opening position. Is stopped, the shutter plate 36 automatically rotates from the closed position to the open position by the urging force applied from the first torsion spring 62. When the mechanical key 25 inserted into the cylinder lock 22 side from the mechanical key insertion hole 37 in the state where the shutter plate 36 is in the open position is pulled out from the mechanical key insertion hole 37 at the lock position, the closing position side biasing force control means 94 is provided. However, the biasing force from the second torsion spring 63 is allowed to be exerted on the shutter plate 36 by allowing the second torsion spring 63 that exerts a larger spring biasing force than the first torsion spring 62 to be exerted on the shutter plate 36. As the shutter plate 36 automatically rotates to the closed position, the operability can be improved by automatically moving the shutter plate 36 between the closed position and the open position.

  Further, the restriction state release means 65 includes a magnetic lock 66 that is unlocked by the magnet key 27, and operates in response to a predetermined operation (push-in operation) of the magnet key 27 in the unlocked state, so that the closed position is reached. Since the restriction state of the restriction means 56 is configured to be released, the restriction state of the closing position restriction means 56 can be released by a simple operation using the magnet key 27.

  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. Is possible.

22 ... Cylinder lock 24 ... Protection device 25 ... Mechanical key 27 ... Magnet key 35 ... Casing 36 ... Shutter plate 37 ... Mechanical key insertion hole 56 ... Closed position restriction Means 62: first torsion spring 63 as an opening direction biasing means ... second torsion spring 65 as a closing direction biasing means ... restricted state releasing means 66 ... magnet lock 94 ... closing Position-side urging force control means

Claims (2)

  A closed position in which the shutter plate (36) closes the mechanical key insertion hole (37) in the casing (35) having the mechanical key insertion hole (37) for inserting the mechanical key (25) into the cylinder lock (22). And a cylinder lock protection device that is accommodated so as to be able to move between the open positions for opening the mechanical key insertion hole (37), and for restricting the shutter plate (36) to the closed position and the shutter. The closed position restricting means (56) that can switch the restriction release state that allows the operation of the plate (36) to the open position, and the restriction state of the closed position restricting means (56) are released to make the restriction release state. Restriction state releasing means (65) to be obtained, opening direction biasing means (62) for biasing the shutter plate (36) toward the opening position, A closing direction biasing means (63) capable of exerting a biasing force larger than that of the opening direction biasing means (62) on the shutter plate (36) toward the closing position, and at least the shutter plate (36). ) During the operation from the closed position to the open position, the function of the closing direction urging means (63) is stopped and the mechanical key insertion hole (37) at the predetermined rotation position of the mechanical key (25) is stopped. The urging force is applied from the closing direction urging means (63) to the shutter plate (36) so that the urging force is applied to the shutter plate (36) from the closing direction urging means (63) according to the pulling operation of the closing direction. A cylinder lock protection device comprising: a closing position side biasing force control means (94) for controlling the force transmission.   The restriction state release means (65) includes a magnet lock (66) unlocked by the magnet key (27) and operates in response to a predetermined operation of the magnet key (27) in the unlocked state. 2. The cylinder lock protection device according to claim 1, wherein the cylinder lock protection device is configured to release a restriction state of the closing position restriction means (56).

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