JP2013014953A - Cylinder lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylinder lock which facilitates exchanging operation and has versatility with a simple structure.SOLUTION: A case body 11 is provided with a case locking part 11s having an inner periphery edge shape which is different from a circular form centering an axis line 10x. A nonslip member 25, which includes a nonslip engaging part 25b engaging with the case locking part 11s from backward in an axial direction to prevent an external cylinder 12 and an internal cylinder 13 from escaping forward in the axial direction, is attached to the internal cylinder 13 movably in a radial direction so as to rotate with the internal cylinder 13. When an exchange key CK is not inserted into a keyhole 13a, the nonslip engaging part 25b is disposed at a lock position LT outwardly in the radial direction, which engages with the case locking part 11s, regardless of an angular position of the internal cylinder 13. When the exchange key is inserted into the keyhole 13a, the nonslip engaging part 25b is disposed at a retreat position RT inwardly in the radial direction, which determines whether or not to engage with the case locking part 11s by a position change in the radial direction of a corresponding part of the inner periphery edge shape, according to the angular position of the internal cylinder 13.

Description

  The present invention relates to a cylinder lock, and more particularly, to a structure of a cylinder lock configured such that the lock structure can be replaced.

  In general, in a cylinder lock having an inner cylinder that is rotatably accommodated in an outer cylinder, only the inner cylinder is configured to be detachable, and can be appropriately replaced, thereby preventing misuse of the key. Those are known (see Patent Documents 1 and 2). However, if only the inner cylinder is configured to be detachable in this way, restrictions are imposed on the structure of the inner cylinder in order to ensure the handleability of the inner cylinder alone, and the inner cylinder can be detached from the outer cylinder. For this reason, there is a problem that the entire lock structure is also restricted, and therefore, a cylinder lock configured to be replaceable including the outer cylinder of the cylinder lock has been developed (for example, see Patent Documents 3 to 6 below). ).

JP 2006-132107 A JP 2011-001779 A Japanese Patent Publication No. 50-002433 Japanese Utility Model Publication No. 02-049318 Japanese Examined Patent Publication No. 06-074684 Japanese Patent No. 2963059

  However, each of the above-described various replaceable cylinder locks requires a special operation at the time of replacement, and can only be handled by a skilled person (Patent Document 3), and is a type of cylinder lock in which the key is exposed on the outer surface of the inner cylinder. However, it can only be applied (Patent Documents 4 and 6), and there are various inconveniences such as a separate clutch body that can be connected / disconnected to the inner cylinder and a complicated structure (Patent Document 5). However, there is a problem that a lock structure that is versatile and requires a simple structure cannot be realized.

  Therefore, the present invention solves the above-mentioned problems, and its object is to realize a cylinder lock that can be exchanged easily and has a versatile and simple structure and can be changed in lock structure.

  The cylinder lock according to the present invention includes an inner cylinder having a keyhole provided along an axis, an outer cylinder that rotatably accommodates the inner cylinder, and an outer cylinder that is detachably accommodated from the front in the axial direction. The present invention relates to a cylinder lock including a case body and locking means for determining whether or not the inner cylinder can be rotated with respect to the outer cylinder according to a key structure inserted into the key hole. The locking means is configured such that when the regular key is inserted into the keyhole, the inner cylinder can be rotated in the outer cylinder by the key structure of the regular key, and when the key is not inserted into the keyhole, When a key other than this key is inserted, the rotation of the inner cylinder within the outer cylinder is restricted.

  The case body includes a case locking portion having an inner peripheral edge shape different from a circle centered on the axis. The case locking portion can be provided at an appropriate position in the axial direction of the inner cylinder, but is preferably attached to the rear end portion of the case body in order to improve security and simplify the structure. . In addition, it is preferable that the said case latching | locking part has a shape along the outer periphery of an inner cylinder. Further, the case locking portion has an angular range corresponding to at least the rotatable range of the inner cylinder in the entire circumference around the axis along the outer circumference of the inner cylinder (a range in which the retaining engagement portion may be disposed). What is necessary is just to be provided in.

  On the other hand, the inner cylinder is engaged with the key engaging part facing the key hole and the case locking part from the rear in the axial direction, thereby moving the inner cylinder forward in the axial direction of the inner cylinder. A retaining member having a retaining engagement portion for preventing escape is mounted so as to be movable in the radial direction and to rotate together with the inner cylinder. As a result, by engaging the retaining engagement portion of the retaining member with the case locking portion from the rear in the axial direction, the inner cylinder is locked by the case locking portion, and is pulled out forward in the axial direction with respect to the case body. It can be in a stopped state. Further, by inserting a key having an appropriate key structure into the keyhole, the retaining member can be moved in the radial direction and can be rotated with the rotation of the inner cylinder.

  Further, the retaining engagement portion is radially outwardly engaged with the case locking portion regardless of an angular position within at least the rotatable range of the inner cylinder when the exchange key is not inserted into the key hole. When the exchange key is inserted into the key hole, the position of the corresponding portion of the inner peripheral shape corresponding to the angular position of the inner cylinder is changed in the radial direction with respect to the case locking portion. It is disposed at a retracted position on the radially inner side that causes the engagement. Since the retaining engagement part is mounted so as to rotate with the inner cylinder, the retaining engagement part also rotates with the rotation of the inner cylinder, but when the exchange key is not inserted into the keyhole, The inner cylinder cannot be escaped forward in the axial direction from the case body because it is disposed at the radially outer locking position and is always locked to the case locking portion regardless of the angular position of the inner cylinder. Further, when the exchange key is inserted into the key hole, the retaining engagement portion is arranged at the retracted position on the radially inner side, so that the radius of the corresponding portion of the inner peripheral shape of the case locking portion according to the angular position of the inner cylinder Since the position change in the direction may or may not be engaged with the case locking portion, setting the inner cylinder at a specific angular position causes the retaining engagement portion to be engaged with the case locking portion by the specific portion of the inner peripheral edge shape. Since it can be configured not to be stopped, the inner cylinder can be allowed to escape from the case body forward in the axial direction. Here, the specific angular position is not particularly limited, but in order to avoid unauthorized release of the locked state due to removal of the lock structure, it is preferable to use an angular position other than the lock angle position, and further, the inner cylinder can be used for removing the lock structure. In order to improve the security by making the rotation operation of the above indispensable condition, it is desirable to set an angular position other than the locking angle position and the unlocking angle position. On the other hand, by setting the specific angular position as the unlocking angular position, it is possible to easily perform the replacement work while avoiding unauthorized unlocking.

  According to the present invention, the retaining member is mounted so that the retaining member is movable in the radial direction with respect to the inner cylinder so as to rotate together with the inner cylinder, and the retaining engagement portion is engaged from the rear in the axial direction. The inner cylinder can be held with respect to the case body simply by providing the case body, and when the exchange key is inserted into the keyhole, the retaining member is arranged at the retracted position, so that the inner peripheral shape of the case locking portion Since the engagement with the case locking portion is released at a specific angular position according to the position, the inner cylinder can be easily removed from the case body simply by adjusting the inner cylinder to the specific angular position with the exchange key inserted. Become. Therefore, the simplicity of the lock structure can be ensured, the replacement work can be facilitated, and the entire lock can be made compact (particularly in the radial direction).

  In one aspect of the present invention, the outer cylinder includes an outer cylinder locking portion between the inner cylinder and the case locking portion, and the retaining engagement portion includes the locking position and the retracting position. Regardless of the position of the inner cylinder, the inner cylinder is engaged with the outer cylinder engaging portion from the rear in the axial direction regardless of the angle position within the rotatable range of the inner cylinder, and the inner cylinder is moved forward in the axial direction with respect to the outer cylinder. Prevent escape. According to this, since the retaining engagement portion can be engaged with the outer cylinder engaging portion from the rear in the axial direction and the inner cylinder can be retained axially forward with respect to the outer cylinder, the inner cylinder and the outer cylinder can be It is not necessary to use another fixing means for fixing in the axial direction. For this reason, the structure can be further simplified. In addition, it is preferable that the said outer cylinder latching | locking part has a shape along the outer periphery of an inner cylinder. Further, the case locking portion has an angular range corresponding to at least the rotatable range of the inner cylinder in the entire circumference around the axis along the outer circumference of the inner cylinder (a range in which the retaining engagement portion may be disposed). What is necessary is just to be provided in.

  In this case, the case body has a cross-sectional structure corresponding to the inner peripheral edge shape, and the outer cylinder is fitted to the cross-sectional structure of the case body corresponding to the outer peripheral edge shape of the outer cylinder locking portion. It is preferable to have a cross-sectional structure in which rotation is restricted. According to this, since both can be fixed in the rotational direction by fitting the cross-sectional structure of the outer cylinder and the cross-sectional structure of the case body, there is no need to provide another restricting means for restricting the rotation of the outer cylinder with respect to the case body. . In addition, the cross-sectional structure of the case body corresponds to the inner peripheral edge shape of the case locking portion, and the cross-sectional structure of the outer cylinder corresponds to the outer peripheral edge shape of the outer cylinder locking portion. It can be set as a simple structure.

  More specifically, for example, the outer cylinder has an outer peripheral ridge that extends in the axial direction and reaches the outer cylinder locking portion at a specific angular position, and the case body extends in the axial direction to lock the case. An inner circumferential groove that fits into the outer circumferential ridge at the specified angular position, and the retaining engagement portion is located at the specified angular position when in the retracted position. On the protruding portion corresponding to the outer peripheral ridge of the outer peripheral locking portion, which is disposed on the inner side of the concave edge corresponding to the inner peripheral concave groove of the stopper and retracts from the case locking portion. It is desirable to be arranged. According to this, the fixing action of the rotation direction between both is reliably realizable by fitting with the outer periphery protruding item | line of an outer cylinder, and the inner periphery recessed groove of a case body. In addition, the retaining engagement portion is arranged on the inner side of the concave edge corresponding to the inner circumferential concave groove of the case locking portion, and is disposed on the protruding portion corresponding to the outer peripheral protrusion of the outer cylinder locking portion. Thus, since the engagement state with respect to the outer cylinder can be maintained while releasing the retaining state with respect to the case body, the inner cylinder can be reliably taken out from the case body together with the outer cylinder.

  In this case, the inner cylinder has a connecting projection that protrudes rearward in the axial direction, and further includes an operating member that engages with the connecting projection and operates along with the rotation of the inner cylinder. Is within a range including at least a position moved forward in the axial direction by a fitting depth between the connecting convex portion and the actuating member from a corresponding position in the axial direction where the retaining engagement portion is disposed. An inclined guide surface that is inclined from the radially outer side to the radially inner side and guided so as to be able to escape from the inner circumferential groove in the rotational direction around the axis while being moved radially inward. It is desirable to have an enlarged sub-guide part provided to extend in the surrounding rotational direction. According to this, by providing the expansion auxiliary guide part in the inner circumferential concave groove, when the inner cylinder and the outer cylinder are inserted into the case body, the retaining engagement part is guided along the inclined guide surface. Since it is possible to escape from the inner circumferential recess in the rotational direction around the axis, the angle position of the inner cylinder can be corrected and adjusted without being obstructed by the case body when the connecting projection is fitted to the operating member. The connecting projection between the inner cylinder and the operation member (locking member such as dead bolt or driving member for driving the locking member) that operates according to the rotation of the inner cylinder is easily connected. It becomes possible to do.

  In another aspect of the present invention, the retaining member is attached to the inner cylinder in a state in which the retaining member is constantly urged toward a side where the retaining engagement portion on the radially outer side is provided. According to this, when the retaining member is not subject to any restriction such as inserting the exchange key into the keyhole, the retaining engagement portion is disposed at the radially outer locking position by the biasing force. The state of engagement with the locking portion can be reliably maintained.

  In another aspect of the present invention, the locking means includes an engagement recess configured to arrange a radial position at a reference position when a regular key is inserted into the keyhole, When the plurality of tumblers built in the inner cylinder and the engagement recesses of at least one of the tumblers deviate from the reference position, they cannot be retracted into the inner cylinder, and the engagement recesses of all the tumblers And a tip of the side bar protruding from the inner cylinder at the locking angle position and the unlocking angle position. A locking groove formed in the outer cylinder so as to accommodate the portion. According to this, the security of the cylinder lock can be enhanced, and a tumbler positioned according to the key structure inserted into the keyhole and a side bar for restricting rotation are separately provided, so that the tumbler and the outer lock can be provided separately. Since the rotation operation force applied to the inner cylinder is not directly applied to the tumbler because the cylinder is not directly engaged with the cylinder, the rotation operation force is applied only to the side bar, so that the durability of the lock structure can be improved.

  According to the present invention, it is possible to achieve an excellent effect that it is possible to realize a cylinder lock capable of replacing the lock structure, which is easy to replace, versatile, and requires a simple structure.

The disassembled perspective view which shows the outline of the whole structure of embodiment of the cylinder lock which concerns on this invention. Sectional drawing (a) along the axial direction of the embodiment, a rear view (b), a front view (c1) in an unlocked state (opened), and a front view (c2) in a locked state (closed). Sectional drawing which shows the operation state of the tumbler at the time of insertion of the normal key in the same embodiment in the cross section orthogonal to the axial direction seen from the axial direction front side. Sectional drawing which shows the operation state of the tumbler at the time of insertion of keys other than the regular key in the embodiment in the cross section orthogonal to the axial direction seen from the axial direction front side. Sectional drawing which shows the action | operation state of the retaining member at the time of insertion of the normal key in the embodiment in the cross section orthogonal to the axial direction seen from the axial direction back side. Sectional drawing which shows the action | operation state of the retaining member at the time of insertion of the exchange key in the embodiment in the cross section orthogonal to the axial direction seen from the axial direction back side. The side view of the normal key used for the embodiment, and the front view of a key structure part. The side view of the exchange key used for the embodiment and the front view of a key structure part. Sectional drawing (a), back view (b), and front view (c) of the case body of the embodiment. Sectional drawing (a), the rear view (b), the front view (c), and the bottom view (d) of the outer cylinder of the embodiment.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an exploded perspective view showing an outline of the overall configuration of an embodiment of a cylinder lock according to the present invention, FIG. 2 is a sectional view (a), a rear view (b) and an unlocking view along the axial direction of the embodiment. It is a front view (c1) when it exists in a state (open) UL, and a front view (c2) when it exists in a locked state (closed) LK.

  The cylinder lock 10 is housed in a case body 11 provided with a substantially cylindrical lock structure housing portion 11a, and in a lock structure housing portion 11a of the case body 11, and includes a substantially cylindrical inner tube housing portion 12a therein. A substantially cylindrical outer cylinder 12, a key hole 13 a that is rotatably accommodated in the inner cylinder accommodating portion 12 a of the outer cylinder 12, and is formed along the axis 10 x, and communicates across the key hole 13 a. A plurality of tumbler holes 13b formed along a radial direction orthogonal to 10x and arranged in the axial direction, a retaining member hole 13c formed further rearward in the axial direction of the tumbler hole 13b, and a plurality of tumbler holes 13b A substantially cylindrical inner cylinder 13 having a side bar hole 13d formed to extend in the communication axial direction. The axis 10x is the rotation axis of the inner cylinder 13.

  In addition, display plates 14A and 14B made of a semi-arc-shaped strip are mounted on the outer periphery of the front surface of the inner cylinder 13. Display board 14A and 14B may be comprised by integral annular. A display cover 15 that covers the outer periphery of the front surface of the inner cylinder 13 and the display plates 14 </ b> A and 14 </ b> B is attached to the outer periphery of the front end of the outer cylinder 12. The display cover 15 is provided with a preferably circular central opening 15a that exposes the opening of the key hole 13a of the inner cylinder 13, and a display window 15b that allows a part of the display plates 14A and 14B to be visually recognized.

  Further, a connecting projection 13e protruding in the axial direction is provided at the rear end of the inner cylinder 13, and this connecting projection 13e is fitted into a long hole 16a of the slide plate 16 corresponding to the operating member. The slide plate 16 is slid along with the rotation. The slide plate 16 includes an overhanging portion 16b, and the overhanging portion 16b performs a sliding operation within a range restricted by the locking projections 11b protruding from the rear end (four corners) of the case body 11. A fixing plate 17 is fixed to the locking protrusion 11b of the case body 11 by using a fixing hole 11c and the case body 11 and the fixing plate 17 are held with the slide plate 16 sandwiched therebetween.

  A tumbler 21 and an elastic member 22 such as a coil spring shown in FIGS. 3 and 4 are accommodated in the tumbler hole 13b of the inner cylinder 13, and the tumbler 21 is always urged to one side in the radial direction by the elastic member 22. Yes. The tumbler 21 is formed with a key engaging portion (hole) 21a in a portion (central portion) corresponding to the key hole 13a, and the tumbler 21 is moved in the radial direction by an engaging action of a key structure to be described later with the key engaging portion 21a. To move to. The tumbler 21 is provided with a notch-shaped engaging recess 21b. The engaging recess 21b is formed on the side of the tumbler 21 so as to be able to communicate with the sidebar hole 13d.

  A side bar 23 is accommodated in the side bar hole 13d so as to be able to protrude and retract with respect to the inner cylinder 13, and an elastic member 24 such as a coil spring that constantly urges the side bar 23 radially outward is disposed. The side bar 23 urged by the elastic member 24 preferably has a chevron-shaped tip 23a protruding from the inner cylinder 13 and is fitted into a preferably trough-shaped locking groove 12b formed on the inner surface of the outer cylinder 12. To do. In the illustrated example, the side bar 23 has a tip portion 23a extending in the axial direction, and the locking groove 12b is also formed on the inner surface of the outer cylinder 12 so as to extend in the axial direction corresponding to the tip portion 23a. The locking recess grooves 12b are respectively provided corresponding to the locking position LK and the unlocking position UL, which are specific rotation postures of the inner cylinder 13, and are formed with an angular difference of 180 degrees from each other in the illustrated example. The base end portion of the side bar 23 is configured to be able to fit into the engaging recess 21b of the tumbler 21. When the engaging recesses 21b of the plurality of tumblers 21 are all directly opposed to the sidebar hole 13d from the inside, the base end portion of the sidebar 23 can be accommodated in the engaging recess 21b. It becomes possible to sink into the inner cylinder 13 against the elastic force of the elastic member 24.

  A retaining member 25 and an elastic member 26 such as a coil spring shown in FIGS. 5 and 6 are accommodated in the retaining member hole 13c of the inner cylinder 13, and the retaining member 25 is arranged on one side in the radial direction by the elastic member 26. Is always energized. The retaining member 25 is accommodated in the retaining member hole 13 so as to be movable in the radial direction and attached to rotate together with the inner cylinder 13. The retaining member 25 is formed with a key engaging portion (hole) 25a at a portion (central portion) corresponding to the key hole 13a, and the retaining member is engaged by the engagement of the key structure to be described later with the key engaging portion 25a. 25 moves in the radial direction.

  The retaining member 25 has a slit 25d on one side, and this slit 25d cuts a part of the periphery of the opening on the side of the opening portion having the inner edge shape that constitutes the key engaging portion 25a. The shape is made. On both sides of the slit 25d, a belt-like elastic piece 25e and a facing portion 25f facing the elastic piece 25e are arranged with their ends facing each other. Here, the outer edge of the facing portion 25f is arranged on the inner side than the outer edge of the elastic piece portion 25e. Further, a step 13s corresponding to the difference in position between the elastic piece 25e and the outer edge of the facing portion 25f is formed on the inner edge of the retaining member hole 13c. The retaining member 25 is accommodated in the retaining member hole 13c with the end of the elastic piece 25e facing the step 13s.

  In this way, when the retaining member 25 is mounted in the retaining member hole 13c from the left side of FIG. 5, the retaining member 25 is retained while the end of the elastic piece 25e is elastically deformed inward. Since the elastic piece 25e is inserted into the hole 13c and restored to the outside when the elastic piece 25e exceeds the step 13s and stored as shown in the figure, the workability at the time of mounting is improved without complicating the structure. Without making it difficult, the end of the elastic piece 25e abuts on the step 13s, so that the retaining member 25 can be prevented from falling off the inner cylinder 13. Here, since the elastic piece portion 25e is wider than the opposing portion 25f and is longer in the extending direction, it is possible to secure the amount of elastic deformation at the time of mounting while enhancing the rigidity in the extending direction.

  As shown in FIGS. 5 and 6, one end of the retaining member 25 is a retaining engagement portion 25 b that is an engaging end protruding from the inner cylinder 13. A portion on the distal end side of the retaining engagement portion 25b is an engagement distal end portion 25c that is narrower than the proximal end side. The retaining engagement portion 25b protrudes outward in the radial direction by the elastic force of the elastic member 26, and is an outer cylinder locking portion formed around the axis 10x along the outer periphery of the inner cylinder 13 on the outer peripheral side in the radial direction of the inner cylinder 13. (Surrounding belt-shaped outer cylinder locking surface) 12s is engaged from the rear in the axial direction, and the engagement tip 25c of the retaining engagement part 25b is further radially outer peripheral side of the outer cylinder locking part 12s. , The case engaging portion (circular belt-like case engaging surface) 11s formed around the axis 10x along the outer periphery of the inner cylinder 13 is also engaged from the rear in the axial direction.

  In the present embodiment, the retaining member 25 has a retaining engagement portion 25b (engaging tip portion 25c) in the retaining member hole 13c in the radial direction from above the case locking portion 11s at all angular positions of the inner cylinder 13. It has a moving range that can be completely retracted. This facilitates removal of the inner cylinder 13 from the outer cylinder 12. However, the movement range in the radial direction of the retaining member 25 is limited to a range that cannot be retracted from the case locking portion 11s at an angular position other than a specific angular position θs described later, thereby preventing illegal removal of the lock structure. can do.

  FIG. 7 shows a normal key (normal key) IK, and FIG. 8 shows an exchange key (exchange key) CK. In the present embodiment, the normal key IK and the exchange key CK include key structure portions IKs and CKs having the same length. However, the present invention is not limited to this, and, for example, the exchange is performed more than the length of the key structure portion IKs of the normal key IK. You may comprise so that the length of the key structure part CKs of the key CK may become large. In the present embodiment, there are guide grooves IKg, CKg in the center of the key structure portions IKs, CKs, and the key structures IKs, CKs are axially moved by the guide strips 13p of the inner cylinder 13 when inserted into the key holes 13a of the inner cylinder 13. Be guided to.

  The key structure portion IKs (key pile in the illustrated example) engages with the key engaging portion 21a of the tumbler 21 to position the tumbler 21 at a desired radial position, but with the key engaging portion 25a of the retaining member 25, Is not effectively engaged, and the retaining engagement portion 25b is set to the radially outer locking position LT which is the initial position shown in FIG. However, even if the key structure portion IKs engages with the key engaging portion 25a of the retaining member 25, as a result, the retaining engagement portion 25b is arranged at a locking position LT that satisfies the conditions described later. It only has to be. On the other hand, the key structure portion CKs (key pile in the illustrated example) engages with the key engaging portion 21a of the tumbler 21 and the key engaging portion 25a of the retaining member 25, so that the tumbler 21 and the retaining member 25 are in a desired radial direction. Positioned at the position, the retaining engagement portion 25b is disposed at the retreat position RT on the radially inner side, which is the operating position shown in FIG.

  As shown in FIGS. 7 and 8, in the key structure portion IKs of the normal key IK and the key structure portion CKs of the exchange key CK, the key engagement portion 21a of the tumbler 21 or the key engagement portion 25a of the retaining member 25 is provided. IKt and CKt are formed on the opposite side (reverse side in the illustrated example). For this reason, since the normal key IK and the exchange key CK can engage with different parts of the key engagement portion 21a, the exchange key CK can be configured as a master key of the normal key IK. In the present embodiment, the engagement edges IKt and CKt are provided on the opposite side, so that the key engagement portion 25a of the retaining member 25 is engaged only with the engaging edge CKt (the retaining member 25 is moved to the retracted position). The engagement edge IKt is engaged (engaged so as to position the retaining member 25 at the locking position LT). In the illustrated example, since the key is a reversible type, the pair of engagement edges IKt and CKt are provided symmetrically by 180 degrees, but the present invention is not limited to this.

  As shown in FIG. 9, the case locking portion 11 s formed around the axis 10 x along the outer periphery of the inner cylinder 13 is provided at the rear in the axial direction of the case body 11 so as to face rearward in the axial direction. It is a flat surface along a plane orthogonal to the axial direction. On the other hand, as shown in FIG. 10, the outer cylinder locking portion 12 s formed around the axis 10 x along the outer periphery of the inner cylinder 13 so as to face rearward in the axial direction at the rear in the axial direction of the outer cylinder 12. Provided. The outer cylinder locking portion 12s is formed in the middle in the radial direction between the inner cylinder 13 and the case locking portion 11s, and is a flat surface formed on the same plane as the case locking portion 11s. Both the case locking portion 11s and the outer cylinder locking portion 12s are provided at positions opened toward the rear in the axial direction in the case body 11 and the outer cylinder 12 in order to simplify the structure. Yes. However, the case locking portion 11s and the outer cylinder locking portion 12s may be configured by providing a slit or a concave groove at an intermediate position in the axial direction of the case body 11 and the outer cylinder 12, respectively. Note that the case locking portion 11s and the outer cylinder locking portion 12s are configured so that at least the angle range of the case cylinder 11 and the outer cylinder 12 corresponding to the angle range in which the inner cylinder 13 can rotate with respect to the outer cylinder 12 is What is necessary is just to be comprised around the axis line 10x along the outer periphery. In particular, in the present embodiment, since the specific angular position θs is set between the unlocking angle position and the locking angle position, the case locking portion within an angle range corresponding to the unlocking angle position and the locking angle position. 11s and the outer cylinder latching | locking part 12s should just be comprised around the axis line 10x along the outer periphery of the inner cylinder 13. As shown in FIG.

  As shown in FIG. 9, an inner circumferential groove 11 t extending in the axial direction is provided on the inner circumferential surface of the case body 11, and as shown in FIG. 10, an inner circumferential groove 11 t and an outer circumferential groove 11 t are formed on the outer circumferential surface of the outer cylinder 12. An outer peripheral ridge 12t having a shape that can be fitted at a corresponding position is formed. The outer cylinder 12 can be inserted into the lock structure housing portion 11a of the case body 11 from the front in the axial direction. When the outer cylinder 12 is inserted into the case body 11, the inner circumferential groove 11 t and the outer circumferential protrusion 12 t are fitted, whereby the outer cylinder 12 is fixed to the case body 11 in the rotational direction around the axis 10 x. . The inner circumferential recessed groove 11t extends to the case locking portion 11s and constitutes a concave edge portion 11sr configured to be concave toward the outside in the radial direction on a part of the inner peripheral edge shape of the case locking portion 11s. Further, the outer peripheral ridge 12t extends to the outer cylinder locking portion 12s, and a part of the outer peripheral edge shape of the outer cylinder locking portion 12s is configured to protrude outward in the radial direction, and protrudes outward in the radial direction. The protruding portion 12sp is formed. In other words, the outer cylinder locking portion 12s has an outer edge shape that protrudes radially outward at a corresponding position (specific angular position θs) of the outer circumferential ridge 12t, and the case locking portion 11s is formed in the inner circumferential groove 11t. It has an inner edge shape avoiding radially outward at the specific angular position θs as the corresponding position. Such inner edge shape and outer edge shape are fitted to each other on a plane orthogonal to the axis 10x where the case locking portion 11s and the outer cylinder locking portion 12s are arranged.

  In the illustrated example, the specific angular position θs is the locking angular position where the retaining engagement portion 25b is disposed when the inner cylinder 13 is in the locking position LK, and the inner cylinder 13 is in the unlocking position UL. Is provided within the range (180 degrees in the illustrated example) (the angular position of 90 degrees that is the intermediate angle of the range) between the unlocking angular position where the locking engagement portion 25b is disposed. However, it is not particularly limited. For example, the specific angular position θs may be provided outside the above range. However, it is preferable to set the angular position other than the locking angular position to the specific angular position θs in order to make it difficult to illegally release the locked state, and to specify the angular position other than the locking angular position and the unlocking angular position. The angular position θs is desirable in order to enhance security by preventing replacement unless the inner cylinder 13 rotates. However, by setting the specific angular position θs as the unlocking angular position, the replacement work can be easily performed while avoiding unauthorized unlocking. Furthermore, since the outer circumferential ridge 12t of the outer cylinder 12 is provided at a predetermined angular position where the locking groove 12b is formed, it is preferable in securing or increasing the thickness of the outer cylinder 12 at the angular position. . In particular, when the outer cylinder 12 is made of a resin material, there is an advantage that the rigidity of the outer cylinder 12 can be increased.

  In the inner circumferential groove 11t, an enlarged sub-guide portion 11p that is widened so as to eliminate the step in the width direction of the inner circumferential groove 11t provided in the other part at the rear portion of the case body 11 is formed. . The expansion auxiliary guide portion 11p extends in the rotation direction toward both sides around the axis 10x of the inner circumferential groove 11t and moves to the inner circumferential surface of the case body 11 outside the rotation direction around the axis of the inner circumferential groove 11t. Accordingly, there is an inclined guide surface whose radial position is inclined from the radially outer side toward the radially inner side. This inclined guide surface is movable in the radial direction when the inner cylinder 13 is rotated when the retaining member 25 is disposed within a predetermined range in the axial direction in which the enlarged auxiliary guide portion 11p is formed. The tip end edge of the retaining engagement portion 25 of the constructed retaining member 25 is guided so that it can escape from the angular region in the inner circumferential groove 11t. The predetermined range is a range including at least a position where the inner cylinder 13 is moved from the normal position forward in the axial direction by the fitting depth between the connecting convex portion 13e and the long hole 16a.

  Further, as shown in FIGS. 5 and 9, the case body 11 is provided with a flange portion 11d behind the case locking portion 11s, and the inner peripheral surface of the flange portion 11d has the case locking portion 11s on the outer peripheral side. It becomes the surrounding wall surface 11e surrounding from. The peripheral wall surface 11e is configured at a position where it can abut against the leading edge of the retaining member 25 so as to guide the leading edge of the retaining member 25b, and is not restricted by the key structure CKs of the exchange key CK. Sometimes, the tip edge of the retaining engagement portion 25b of the retaining member 25 may be held in contact with the peripheral wall surface 11e. In the illustrated example, the peripheral wall surface 11e is a cylindrical surface centered on the axis 10x.

  The present embodiment configured as described above operates as follows. When the inner cylinder 13 is in the unlocked position UL as shown in FIG. 2 (c1), the slide plate 16 is in the position indicated by the solid line in FIG. 1 and is unlocked, but the normal key IK or the exchange key CK is When inserted into the keyhole 13a, the plurality of tumblers 21 are all positioned at the reference position as shown in FIG. 3, and in the example shown in the figure, all the engagement recesses 21b are aligned in the axial direction. The side bar 23 fitted in the locking groove 12b can be retracted into the inner cylinder 13, and the inner cylinder 13 can rotate. At this time, in the illustrated example, the inner cylinder 13 is rotated 180 degrees clockwise to set the locking position LK shown in FIG. 2 (c2), and the front end portion 23a of the side bar 23 is fitted in the other locking recess groove 12b. Match. Further, the slide plate 16 is slid to the position of the two-dot chain line in the drawing and locked. When the inner cylinder 13 is rotated counterclockwise in this state, it can be returned to the unlocked position UL again.

  Here, at the unlocking position UL and the locking position LK, since the distal end portion 23a of the side bar 23 is fitted in one of the locking concave grooves 12b as described above, the engagement with the proximal end portion of the side bar 23 is possible. Since the movement of the tumbler 21 in the radial direction is not restricted because the mating recess 21b is not fitted, the key can be freely inserted and removed. On the other hand, at the angular positions other than the unlocking position UL and the locking position LK, the distal end portion 23a of the side bar 23 is in a state of being submerged in the inner cylinder 13, and the proximal end of the side bar 23 is placed in the engagement recess 21b of the tumbler 21. Since the portions are fitted, the movement of the tumbler 21 in the radial direction is restricted, so that the key cannot be removed.

  On the other hand, when a key is not inserted into the keyhole 13a or when a key other than a regular key is inserted into the keyhole 13a, at least one of the engaging recesses 21b of the tumbler 21 is a side bar as shown in FIG. Since it does not face the hole 13d, the front end portion 23a of the side bar 23 cannot be retracted from the locking concave groove 12b. As a result, the rotation of the inner cylinder 13 in the outer cylinder 12 is restricted, and the unlocking position UL is reached. Alternatively, it is fixed at the locking position LK.

  Next, the operation | movement at the time of removing the outer cylinder 12 and the inner cylinder 13 from the case body 11 in this embodiment is demonstrated. First, when the normal key IK is inserted in the keyhole 13a, when a key other than the regular key is inserted in the keyhole 13a, or when nothing is inserted in the keyhole 13a, it is shown in FIG. Thus, since the key structure does not engage with the key engaging portion 25a of the retaining member 25 or does not work effectively even when engaged with the key engaging portion 25a, The joining portion 25b is disposed at the radially outer locking position LT. Thereby, with respect to both the case locking part 11s and the outer cylinder locking part 12s, the entire angle position of the inner cylinder 13 (if the rotation angle range of the inner cylinder 13 is limited, all of the rotation angle range). ) So that the retaining engagement portion 25b engages (contacts) from the rear in the axial direction (not shown, but can be engaged (engaged when pulled out even if not contacting)). However, regardless of the angular position of the inner cylinder 13, the outer cylinder 12 and the inner cylinder 13 are in a state of being prevented from coming off in the axial direction with respect to the case body 11.

  On the other hand, when the exchange key CK is inserted into the keyhole 13a, a part of the engagement edge CKt of the key structure portion CKs engages with the key engagement portion 25a of the retaining member 25 as shown in FIG. Since the retaining member 25 is moved in the radial direction, the retaining engagement portion 25b is disposed at the retracted position RT on the radially inner side. As a result, the inner cylinder 13 can rotate as described above. However, since the retaining engagement portion 25b is disposed at the retracted position RT, the inner cylinder 13 is different from the case where it is disposed at the locking position LT. The situation changes depending on the angle position.

  That is, when the retaining engagement portion 25b is disposed at an angular position other than the specific angular position θs, the retaining engagement portion 25b is both the case locking portion 11s and the outer cylinder locking portion 12s as described above. Since it is engaged (contacted) from the rear in the axial direction (which is different from that shown in the figure, it can be engaged (it may be engaged when pulled out even if it is not in contact)). 12 and the inner cylinder 13 are in a state in which the case body 11 is prevented from coming off forward in the axial direction. On the other hand, when the inner cylinder 13 rotates and the retaining engagement portion 25b is disposed at a specific angular position θs, the retaining engagement portion 25b has the above-mentioned case as shown by a two-dot chain line in FIG. Since it is arranged radially inward of the concave edge 11sr corresponding to the inner edge shape of the inner circumferential groove 11t of the locking part 11s, it does not engage with the case locking part 11s, and does not engage with the outer cylinder locking part 12s. It engages with the projecting portion 12sp corresponding to the outer peripheral ridge 12t (although it is different from the figure, it can be engaged (may be engaged when pulled out even if not in contact)). As a result, the inner cylinder 13 remains in a state where it is prevented from slipping forward in the axial direction with respect to the outer cylinder 12, but the inner cylinder 13 is in a state where it can be pulled out forward in the axial direction with respect to the case body 11. Therefore, the outer cylinder 12 and the inner cylinder 13 can be extracted from the case body 11 by pulling out the inner cylinder 13 together with the exchange key CK.

  Next, an operation when the outer cylinder 12 and the inner cylinder 13 are inserted into the key structure housing portion 11a of the case body 11 will be described. In this case, with the exchange key CK inserted into the keyhole 13a, the rotational posture of the inner tube 13 relative to the outer tube 12 is set to a state in which the retaining engagement portion 25b is disposed at a specific angular position θs. 12 and the inner cylinder 13 are inserted into the key structure housing portion 11a. At this time, since the retaining engagement portion 25b is located at the retracted position RT, it is disposed on the protruding portion 12sp corresponding to the outer circumferential protrusion 12t in the outer cylinder locking portion 12s. The strip 12t and the retaining engagement portion 25b are inserted through the inner circumferential groove 11t of the case body 11 without any trouble.

  When the inner cylinder 13 is rotated with the exchange key CK inserted after being inserted into the case body 11 as described above, the retaining engagement portion 25b is rotated in the rotational direction from the portion of the outer cylinder locking portion 12s. Therefore, the outer cylinder 12 and the inner cylinder 13 are prevented from slipping forward in the axial direction with respect to the case body 11. Thereafter, when the exchange key CK is set at the locking position LK or the unlocking position UL of the inner cylinder 13 and removed from the key hole 13a, the positioning of the retaining member 25 is released, so that the retaining engagement portion 25b is locked. Returning to LT, this ensures the above-described state of being retained regardless of the angular position of the retaining engagement portion 25b.

  However, when the outer cylinder 12 and the inner cylinder 13 are inserted into the case body 11, the connecting projection 13 e of the inner cylinder 13 is not aligned with the long hole 16 a of the slide plate 16, and the inner cylinder 13 is connected to the slide plate 16. There are cases where this is not possible. In this case, the configuration is such that the retaining engagement portion 25b of the retaining member 25 is disposed in the enlarged sub-recess 11p of the inner circumferential groove 11t even when the connecting convex portion 13e is not inserted into the long hole 16a. Therefore, when the inner cylinder 13 is rotated, the leading end edge of the retaining engagement portion 25b is guided by the inclined guide surface of the widening guide portion 11p, so that the retaining engagement portion 25b gradually becomes radial. It moves to the inner side, and the retaining member 25 eventually escapes from the inner circumferential concave groove 11t and can be brought into contact with the inner circumferential surface of the case body 11 outside the enlarged auxiliary guide portion 11p. In this case, the angular position of the inner cylinder 13 becomes completely free, so that the connecting convex portion 13e is engaged with the long hole 16a (while detecting that the connecting convex portion 13e fits into the long hole 16a). The insertion operation of the outer cylinder 12 and the inner cylinder 13 can be completed by rotating the inner cylinder 13 to a matching angular position and pushing the outer cylinder 12 and the inner cylinder 13 in the axial direction as they are. At this time, when the retaining engagement portion 25b is pushed rearward in the axial direction from the case locking portion 11s, it protrudes onto the case locking portion 11s by the urging force of the elastic member 26. It becomes a state.

  It should be noted that the cylinder lock of the present invention is not limited to the illustrated examples described above, and it is needless to say that various changes can be made without departing from the scope of the present invention. For example, in the above embodiment, the case engaging portion 11s is formed with the concave edge portion 11sr, the outer cylinder engaging portion 12s is provided with the protruding portion 12sp, and the retaining engagement portion 25b at the retracted position RT is the concave edge portion. Although it is arranged to be arranged radially inward from 11 sr and arranged on the protruding portion 12sp, the present invention is not limited to such an embodiment, and is not limited to this form, but an oval shape, an oval shape, an eccentric circle shape, etc. In addition, the case locking portion 11s widely includes those having an inner peripheral edge shape different from the circular shape centering on the axis 10x. Moreover, in the said embodiment, although the inner peripheral groove | channel 11t is formed in the case body 11, and it is made to fit with the outer periphery protruding item | line 12t formed in the outer cylinder 12, this invention is not restricted to such a structure, but a case The fitting cross-sectional structure of the body 11 and the outer cylinder 12 may be various fitting cross-sectional structures different from a circle centering on the axis 10x.

DESCRIPTION OF SYMBOLS 10 ... Cylinder lock, 11 ... Case body, 11a ... Lock structure accommodating part, 11s ... Case latching | locking part, 11t ... Inner periphery ditch | groove, 11p ... Expansion auxiliary guide part, 12 ... Outer cylinder, 12a ... Inner cylinder accommodating part, 12b: Locking groove, 12s: Outer tube locking portion, 12t: Outer peripheral ridge, 13 ... Inner tube, 13a ... Key hole, 13b ... Tumbler hole, 13c ... Retaining member hole, 13d ... Sidebar hole, 13e ... Connecting convex part, 21 ... Tumbler, 21a ... Key engaging part, 23 ... Side bar, 23a ... Tip part, 25 ... Retaining member, 25a ... Key engaging part, 25b ... Retaining engaging part, 25c ... Engagement Tip

Claims (5)

An inner cylinder provided with a keyhole provided along the axis, an outer cylinder that rotatably accommodates the inner cylinder, a case body that accommodates the outer cylinder so as to be insertable / removable from the front in the axial direction, and an inside of the keyhole In a cylinder lock comprising: locking means for determining whether or not the inner cylinder can rotate with respect to the outer cylinder according to a key structure inserted in
The case body has a case locking portion having an inner peripheral edge shape different from a circle centered on the axis,
The inner cylinder is engaged with the key engaging part facing the key hole and the case locking part from the rear in the axial direction, thereby preventing the inner cylinder from escaping forward in the axial direction with respect to the case body. A retaining member having a retaining engagement portion is mounted so as to be able to move in the radial direction and rotate together with the inner cylinder,
When the exchange key is not inserted in the key hole, the retaining engagement portion is a radially outer engagement that engages with the case locking portion regardless of the angular position within the rotatable range of the inner cylinder. When the exchange key is inserted into the key hole when the exchange key is inserted into the key hole, the engagement with the case locking portion is caused by a change in the radial position of the corresponding portion of the inner peripheral edge shape according to the angular position of the inner cylinder. A cylinder lock, wherein the cylinder lock is disposed at a retreat position on the radially inner side that causes the possibility of the failure.   The outer cylinder has an outer cylinder locking part between the inner cylinder and the case locking part, and the slip-off locking engagement part is located in the inner position regardless of the locking position or the retracted position. Regardless of the angular position within the rotatable range of the cylinder, the outer cylinder engaging portion is engaged from the rear in the axial direction to prevent the inner cylinder from escaping forward in the axial direction with respect to the outer cylinder. The cylinder lock according to claim 1.   The case body has a cross-sectional structure corresponding to the inner peripheral edge shape, and the outer cylinder is fitted to the cross-sectional structure of the case body corresponding to the outer peripheral edge shape of the outer cylinder locking portion and is restricted in rotation. The cylinder lock according to claim 2, having a cross-sectional structure.   The outer cylinder has an outer peripheral ridge extending in the axial direction to reach the outer cylinder locking portion at a specific angular position, and the case body extends in the axial direction to reach the case locking section and the outer peripheral ridge. An inner groove that fits into the specific angular position, and the retaining engagement portion is located at the retracted position when the inner circumferential groove of the case locking portion at the specific angular position. It is arrange | positioned inside the concave edge part corresponding to evacuating from the said case latching | locking part, and is arrange | positioned on the protrusion part corresponded to the said outer periphery convex strip of the said outer periphery latching | locking part, It is characterized by the above-mentioned. The cylinder lock according to claim 2 or 3.   The inner cylinder further includes a connecting projection that protrudes rearward in the axial direction. The inner cylinder further includes an operating member that engages with the connecting projection and operates along with the rotation of the inner cylinder. In a range including at least a position moved forward in the axial direction by the fitting depth of the connecting convex portion and the operating member from a corresponding position in the axial direction where the stop engaging portion is disposed, the retaining engagement portion is A tilt guide surface that tilts radially inward from the radially outer side and guides it in a rotational direction around the axis so as to be able to escape in the rotational direction around the axis while being moved radially inward. The cylinder lock according to claim 4, further comprising an extended auxiliary guide portion provided so as to extend.

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