JP6097358B2 - Cylinder lock - Google Patents

Description

  The present invention relates to a cylinder lock in which only a key used for performing unlocking and locking operations can be exchanged and a lock body can be used as it is, that is, a key code can be exchanged.

The lock set is composed of a lock that locks the object to be locked and a key that is inserted into the lock to perform locking and unlocking operations. One type of key is used, and another type of key cannot be locked / unlocked. For this reason, when a key is lost or when a device that uses a lock used at a certain store is moved to another store, for example, for the purpose of security measures, the lock, i.e., the key and the corresponding lock. However, there is a problem that it takes a lot of time and cost for replacement. Note that Patent Document 1 discloses a configuration in which a normal key is used for locking and unlocking, a lock can be removed using a replacement key, and a lock can be easily removed by removing it from the front. ing.

  In addition, the key code can be changed without changing the lock, and the previous key can be locked and unlocked, and the new key corresponding to the changed key code can be locked and unlocked. A cylinder lock having a simple structure is also used (see, for example, Patent Document 2).

JP 10-88874 A JP 2009-299269 A

  The configuration in which the key code can be changed as described above is convenient because it is not necessary to replace the lock and only the key needs to be replaced. However, a configuration in which a new key code can be added is necessary. The lock is created to support a large number of key codes, and in addition, in order to be able to add and change key codes, it is necessary to increase the number of tumblers in, for example, a disk tumbler lock, There is a problem that the total length of the is increased.

  The present invention has been made in view of such a problem, and can increase the number of conversion key codes without increasing the longitudinal dimension of the lock body, and can sufficiently cope with the conversion of the key codes. The purpose is to provide a lock.

In order to achieve such an object, a cylinder lock according to the present invention includes an inner cylinder having a key insertion hole, an outer cylinder that accommodates and holds the inner cylinder in a relatively rotatable manner, and the inner cylinder provided in the inner cylinder. A lock provided with a lock mechanism (for example, first and second tumblers, upper and lower side bars, etc.) for restricting relative rotation of the inner cylinder with respect to an outer cylinder, and the relative rotation by the lock mechanism inserted into the key insertion hole And a key for releasing the regulation. The lock mechanism has a key code structure that operates in cooperation with a key action portion (for example, key groove 13) of a key inserted into the key insertion hole, and the key code structure is a key action portion of a predetermined key. The key action part and the key code are configured so as to release the restriction of the relative rotation by the lock mechanism by operating in cooperation with the key action part only with respect to a predetermined key code included in the key code. A cord releasing means capable of releasing the cooperative operation with the structure or returning the state to the cooperative operation is provided. Further, the cooperative operation is canceled by the code releasing means from the state where the predetermined key is inserted into the key insertion hole, and a different key having a different key code is inserted into the key insertion hole instead of the predetermined key. After that, when the cooperative operation is restored by the code release means, the key code structure operates in cooperation with the key action part only for the different key codes, and the relative rotation is restricted by the lock mechanism. The key code is converted so as to be released, and a plurality of the lock mechanisms having the key code structure are provided at different positions in the circumferential direction of the inner cylinder. Further, the inner cylinder is composed of a main inner cylinder having the key insertion hole and a plurality of sub inner cylinders arranged at a plurality of locations on the outer peripheral portion of the main inner cylinder, and the plurality of the plurality of sub inner cylinders in the main inner cylinder A plurality of first tumblers which are respectively received and arranged so as to be movable in a direction perpendicular to the axis in a first tumbler receiving groove formed extending in a direction perpendicular to the axis on each of a plurality of placement surfaces on which the sub inner cylinder is placed; A second tumbler which is received and arranged in a second tumbler receiving groove formed extending in a direction perpendicular to the axis of each of the plurality of sub-inner cylinders so as to be movable in a direction perpendicular to the axis; The lock mechanism is composed of a side bar arranged to be biased. The first tumbler has an engagement leg projecting into the key insertion hole on the inner diameter side, and is detachably engaged with the inner diameter side of the second tumbler on the outer diameter side, and the second tumbler has an outer diameter. A bar receiving groove for receiving the side bar is formed on the side, and a lock portion formed on the outer diameter side of the side bar is formed on a peripheral surface of a storage space for storing and holding the inner cylinder in the outer cylinder. The inner cylinder side relative to the outer cylinder is restricted, and the protrusion formed on the inner diameter side of the side bar enters the bar receiving groove so that the lock part is detached from the lock groove. The inner cylinder is allowed to rotate with respect to the outer cylinder.

Furthermore, in the cylinder lock having the above-described configuration, preferably, a key action portion of a key inserted into the key insertion hole engages with the engagement leg of the first tumbler, and the first tumbler responds to insertion of the key. In the first tumbler receiving groove, the second tumbler is moved in the direction perpendicular to the axis in the second tumbler receiving groove together with the first tumbler, and the predetermined corresponding to the key code structure. in the axis-perpendicular movement position of the key having a key code is determined is inserted in the second tumbler, said bar receiving groove is the side bar of the projection and opposite to the projection enters the bar receiving channel It becomes possible.

  In the cylinder lock having the above-described configuration, more preferably, the code releasing means is configured to release the engagement between the first tumbler and the second tumbler, and the first key code corresponding to the key code structure. The first tumbler and the second tumbler are engaged with each other by the cord releasing means in a state where the first key having the position is inserted and the first and second tumblers are located at predetermined moving positions. The cord is released after the second key having the second key code is inserted instead of the first key and the first tumbler is moved in the direction perpendicular to the axis via the engagement leg. By re-engaging the first tumbler and the second tumbler by means, the key code structure is operated in cooperation with the key operating portion only with respect to the second key code. It is configured to be converted so as to release the restriction of the relative rotation by the lock mechanism.

  According to the present invention, a lock mechanism having a key code structure that operates in cooperation with a key operation unit only for a predetermined key code of a key operation unit of a predetermined key is converted into a key code by using a code release means. Since it is provided with a plurality of positions at different positions in the circumferential direction of the inner cylinder, the number of conversion key codes can be increased without increasing the longitudinal dimension of the lock. It is possible to obtain a cylinder lock that can sufficiently cope with the conversion.

  In the cylinder lock having the above-described configuration, a plurality of sub inner cylinders are arranged at a plurality of locations on the outer peripheral portion of the main inner cylinder to constitute an inner cylinder, and each of a plurality of mounting surfaces on which the sub inner cylinder is mounted in the main inner cylinder The first tumbler is disposed on the sub-inner cylinder, the second tumbler is disposed on each of the plurality of sub-inner cylinders, and a side bar is disposed on the outer peripheral side to form a lock mechanism. Protruding engagement legs are provided, and the outer diameter side is detachably engaged with the inner diameter side of the second tumbler, a bar receiving groove is formed on the outer diameter side of the second tumbler, and a lock portion on the outer diameter side of the side bar Is inserted into the lock groove of the outer cylinder to restrict the rotation of the inner cylinder, and the protrusion on the inner diameter side of the side bar is inserted into the bar receiving groove, and the lock part is detached from the lock groove to allow the inner cylinder to rotate. Preferably configured toIn this way, the lock mechanism can be configured simply, and a plurality of sub-inner cylinders can be disposed on the outer periphery of the main inner cylinder, and a lock mechanism can be disposed in each sub-inner cylinder. The number of conversion key codes can be effectively increased without increasing the number of keys.

  In the cylinder lock having the above-described configuration, the key operating portion of the key inserted into the key insertion hole engages with the engaging leg of the first tumbler, and the first tumbler and the second tumbler move together in the direction perpendicular to the axis according to the insertion of the key. The bar receiving groove is opposed to the protrusion of the side bar at the position perpendicular to the axis of the second tumbler determined by inserting a key having a predetermined key code, and the protrusion enters the bar receiving groove. It is preferable. Thus, the cylinder lock can be configured using two tumblers that can be engaged and disengaged from each other, and the key code conversion can be easily performed by engaging and disengaging these two tumblers. .

  In this cylinder lock, with the first key having the first key code inserted, the code releasing means releases the engagement between the first tumbler and the second tumbler, and then the first key is Instead, it is preferable that after the second key having the second key code is inserted, the first tumbler and the second tumbler are reengaged by the code releasing means so that the key code can be converted. In this way, it is possible to easily convert the key code corresponding to the new key without exchanging the lock.

It is a perspective view showing the whole appearance of the key of a cylinder lock (disc tumbler lock) to which the present invention is applied and the lock. It is a front view which shows the whole external appearance of the said cylinder lock. It is a disassembled perspective view of the said cylinder lock. It is sectional drawing along the axial direction of the lock | rock which comprises the said cylinder lock. It is a disassembled perspective view which expands and shows a part of said lock | rock. In the said cylinder lock, it is a front view which shows the external appearance in the state which inserted the key half in the lock. FIG. 5 is a cross-sectional view in a direction perpendicular to the axis of a portion having a half-insertion preventing tumbler in a state where the key is half-inserted in the cylinder lock. FIG. 5 is a cross-sectional view in a direction perpendicular to the axis of a portion of the cylinder lock that holds the first and second tumblers in a state where a key is not inserted. FIG. 5 is a cross-sectional view in a direction perpendicular to the axis of a portion that holds the first and second tumblers in a state where the key is half inserted in the cylinder lock. In the cylinder lock, it is a front view showing an appearance in a state where a key is completely inserted into the lock. FIG. 3 is a cross-sectional view in a direction perpendicular to the axis of a portion having a half-insertion preventing tumbler in a state where the key is completely inserted in the cylinder lock. FIG. 12 is an overall external view [FIG. 12 (a)] in a state where the key is completely inserted in the cylinder lock, and a cross-sectional view (FIG. 12 (b)) in a direction perpendicular to the axis of a portion holding the first and second tumblers. . In the cylinder lock, when the key is completely inserted and rotated clockwise, an overall external view [FIG. 13A] and a cross-sectional view perpendicular to the axis of the portion holding the first and second tumblers [FIG. 13 (b)]. FIG. 5 is a cross-sectional view in the direction perpendicular to the axis of a portion that holds the first and second tumblers in a state where the key is completely inserted and rotated clockwise to some extent in the cylinder lock. It is a figure which shows the back side of a lock | rock in the said cylinder lock. It is sectional drawing along the axial direction which shows the state which inserted the conversion jig in the lock | rock which comprises the said cylinder lock. In the said cylinder lock, it is a perspective view which shows the front shape of the partition wall of the outer cylinder member which comprises a lock | rock. In the said cylinder lock, it is a perspective view which shows the state which rotated the inner cylinder 180 degree | times to the code | cord | chord conversion position with the key. FIG. 5 is a cross-sectional view in a direction perpendicular to the axis of a portion that holds the first and second tumblers in the cylinder lock in a state where the inner cylinder is rotated 180 degrees to the code conversion position by a key. It is a perspective view which shows the shape and positional relationship of the 1st and 2nd tumbler in the said cylinder lock. FIG. 5 is a cross-sectional view in a direction perpendicular to the axis of a portion that holds a second tumbler in a state where the inner cylinder is rotated 180 degrees to a code conversion position by a key in the cylinder lock.

  Hereinafter, preferred embodiments will be described with reference to the drawings. As shown in FIGS. 1 and 2, the disc tumbler lock DTK according to the present embodiment includes a key 1 for performing locking and unlocking operations, and a key insertion hole (key hole) 35 into which the key 1 is inserted. And lock 2.

  The key 1 is for a person to hold by hand and insert it into the key insertion hole 35 and rotate it to lock and unlock with the lock 2, and has a grip portion 11 and an insertion portion 12 integrally. Composed. The grip portion 11 has a disk shape and is easy to hold with a finger as shown. The insertion portion 12 is formed in a band plate shape, and key grooves 13 are formed independently on the upper and lower surfaces. Further, an erroneous insertion prevention projection 15 extending in the insertion direction is provided on one end face of the insertion portion 12, and a release projection 14 projecting laterally is provided at the root portion on the opposite end.

As shown in FIGS. 3 and 4, the lock 2 that is locked and unlocked by the key 1 includes an outer cylinder 20 that includes an outer cylinder member 21 having a cylindrical insertion space 21 a that is open on the front side. An inner cylinder 30 that is rotatably received in the insertion space 21a from the front side, and a tail portion 6 that is connected to the inner cylinder 30 via the connecting plate 63 in the insertion space 21a and protrudes to the rear side of the outer cylinder 20. It is prepared for.

  The outer cylinder 20 includes a lid 25 attached to the rear end surface of the outer cylinder member 21 with a countersunk screw 25a. The outer cylinder member 21 is formed in a cylindrical shape, and an insertion space 21a is formed through the inside thereof in the front-rear direction. The insertion space 21a includes a large-diameter cylindrical space 21b that is greatly opened from the front side, a small-diameter cylindrical space 21c that is formed by being narrowed to the inner diameter side in the middle portion, and a rear side that is located on the outer diameter side. The partition wall 28 is formed by an intermediate portion that is formed wide and has an intermediate diameter cylindrical space 21d that opens to the rear surface side, and is narrowed to the inner diameter side forming the small diameter cylindrical space 21c. In the cylindrical space 21b on the front side of the outer cylinder member 21, it extends in the axial direction from the front end toward the partition wall 28, and a pair of upper and lower locking grooves 22a, 22b and upper relief grooves 23a, 23b that are symmetrically opposed to each other. And lower relief grooves 24a and 24b are formed. (See Figure 8 etc.)

  As shown in an enlarged view in FIG. 5, the inner cylinder 30 includes a main inner cylinder 31 having a disk-shaped flange portion 31 a on the front side and a truncated plane formed on the upper and lower sides, and an upper truncated portion of the main inner cylinder 31. An upper sub-inner cylinder 40 placed on a plane and a lower sub-inner cylinder 50 placed on a lower truncated plane are provided. A key insertion hole 35 opened to the front surface is formed at the center of the main inner cylinder 31, and an erroneous insertion prevention groove 35a is formed at the side end of the key insertion hole 35 in the axial direction. As will be described later, the erroneous insertion preventing protrusion 15 of the key 1 is engaged with the erroneous insertion preventing groove 35a. A plurality of first tumbler receiving grooves 32 extending in the left-right direction are formed on the upper mounting surface of the main inner cylinder 31 side by side, and the first tumbler 43 is received and disposed therein. As shown in FIG. 20, the first tumbler 43 has left and right support legs 43b, 43b projecting downward and a central engagement leg 43a, and a plurality of connecting grooves 43c are formed on the upper surface. A plurality of first tumbler receiving grooves 33 extending left and right are also formed on the lower mounting surface of the main inner cylinder 31 side by side, and the first tumbler 53 is received and disposed therein. The first tumbler 53 has the same shape as the first tumbler 43. Further, as shown in FIG. 5, a locking holding groove 32 a that is located at the center in the width direction and that is connected to the front side of each first tumbler receiving groove 32 is formed on the upper mounting surface of the main inner cylinder 31. Although not appearing in FIG. 5, similarly, on the lower mounting surface of the main inner cylinder 31, a locking holding groove 33 a that is located at the center in the width direction and is connected to the first tumbler receiving groove 33 on the rear side is formed. .

  As shown in FIG. 5, the upper sub-inner cylinder 40 has a plurality of second tumbler receiving grooves 41 extending in the left-right direction on the lower surface thereof, and the second tumbler 44 is received and disposed therein. . As shown in FIG. 20, the second tumbler 44 has a pair of connecting legs 44b engageable with the connecting groove 43c of the first tumbler 43 on the lower surface side, and a bar receiving groove 44a is formed on the upper surface side. . A bar arrangement space 42 is formed on the upper surface of the upper sub inner cylinder 40, and the upper side bar 45 is arranged here. At this time, the springs 46 are disposed on the front and rear lower surfaces of the upper side bar 45, and the upper side bar 45 is biased upward (in the outer diameter direction) by the spring 46 with respect to the upper sub inner cylinder 40. The lower sub-inner cylinder 50 has the same configuration as the upper sub-inner cylinder 40 and will not be described in detail. However, a second tumbler receiving groove 51 and a bar arrangement space 52 are formed, and a second tumbler 54 and a lower side bar are formed respectively. 55 is disposed, and the lower side bar 55 is biased downward (in the outer diameter direction) by the spring 56.

  Further, a half-insertion preventing tumbler 36 is attached by being biased laterally by a spring 37 immediately after the flange portion 31 a of the main inner cylinder 31. FIG. 7 shows a state where the half-insertion preventing tumbler 36 is attached to the main inner cylinder 31, which has a preventing projection 36 a at the right end, an engaging portion 36 b at the left end, and is urged rightward by a spring 37. The The outer cylinder member 21 is formed with a half-insertion preventing groove 21 a, and the prevention protrusion 36 a enters the prevention insertion groove 21 a and the inner cylinder 20 is restricted from rotating with respect to the outer cylinder 30.

  FIG. 4 shows a state in which the inner cylinder 30 configured as described above is inserted and disposed in the cylindrical space 21 b on the front side of the outer cylinder member 21. In this state, since the rear end portion 31b of the main inner cylinder 31 passes through the small-diameter cylindrical space 21c and protrudes into the rear cylindrical space 21d, the snap ring 38 is attached to the outer periphery of the rear end portion 31b. The cylinder 30 is held on the outer cylinder member 21. At this time, the upper sub-inner cylinder 40 and the lower sub-inner cylinder 50 are urged rearward by the springs 42 and 52 disposed between the flange portion 31 a and the rear end portion comes into contact with the front surface of the partition wall 28. As shown in FIG. 17, the front surface of the partition wall 28 is in contact with the first abutting surface 28 a that is lowered to the rear where the rear end portion of the upper sub inner cylinder 40 abuts, and the rear end portion of the lower sub inner cylinder 50. A tapered surface 28c having a second abutting surface 28b located in front and extending obliquely between both surfaces 28a, 28b is formed.

In the state where the inner cylinder 30 is attached in the outer cylinder 20 in this way, as shown in FIG. 8, in the connection groove 43c of the first tumbler 43 received and arranged in the first tumbler receiving groove 32 of the main inner cylinder 31, The connecting leg 54b of the second tumbler 44 received and disposed in the second tumbler receiving groove 41 of the upper sub inner cylinder 40 is engaged. Thereby, the 1st tumbler 43 and the 2nd tumbler 44 will be in the state which can move to right and left integrally. The same applies to the lower sub-inner cylinder 50 side, and the first tumbler 53 and the second tumbler 54 are integrally movable to the left and right by the engagement of the connecting groove 53c and the connecting leg 54b. At this time, a plurality of combinations of the first tumblers 43 and 53 and the second tumblers 44 and 54 are provided side by side, and the bar receiving grooves 44a and 54a of the second tumblers 44 and 54 are formed in a state where the key 1 is removed. Located off the center position. In this state, the engaging legs 43 a and 53 a of the first tumblers 43 and 53 protrude into the key insertion hole 35.

  On the other hand, the upper side bar 45 urged in the outer diameter direction by the spring 46 has a lock portion 45b positioned at the upper portion thereof entering the upper lock groove 22a of the outer cylinder member 21, and a protrusion portion 45a positioned at the lower portion of the upper side bar 45. The upper side bar 45 is restricted from moving downward while facing the upper surface of the two tumbler 44. The same applies to the lower side bar 55. The lock portion 55b positioned below the lower side bar 55 enters the lower lock groove 22b of the outer cylinder member 21, and the protrusion 55a positioned above the lower side bar 55 faces the lower surface of the second tumbler 54. The side bar 55 is restricted from moving up.

  The disc tumbler lock DTK performs locking and unlocking by the lock 2 by rotating the inner cylinder 30 inserted and arranged in the insertion space 21 a (large-diameter cylindrical space 21 b) of the outer cylinder member 21 with the key 1. . For this reason, the cylindrical fitting surface (the outer peripheral surface of the large-diameter cylindrical space 21b) with which the inner cylinder 30 is slidably contacted with the outer cylinder member 21 is important. This is referred to as a shear plane and shows the shear plane in the cross section. The line will be described as a share line. In the above state, the lock portions 45 b and 55 b of the upper and lower side bars 45 and 55 are positioned across the shear plane (share line), and thereby the inner cylinder 30 rotates with respect to the outer cylinder 20. Is regulated.

  When the inner cylinder 30 is attached in the outer cylinder 20 as described above, the tail portion 6 is then attached to the rear end portion thereof. The tail portion 6 includes a connecting plate 63 urged rearward by a spring 64, a tail joint 60 attached so as to cover the rear portion 31b of the main inner cylinder 31 with the connecting plate 63 positioned inside, and a tail joint 60. And an angle restricting cam 65 attached to the intermediate portion 60b. The tail joint 60 has a cylindrical front portion 60 a that covers the rear portion 31 b of the main inner cylinder 31 and is rotatably disposed in the rear cylindrical space 21 d of the outer cylinder member 21. A lid 25 fixed by a countersunk screw 25a is held rotatably. An angle regulating cam 65 is fixed to the intermediate portion 60 b of the tail joint 60, located after the lid 25. Connection plate receiving spaces 31c, 62 having a rectangular cross section are formed in the rear portion 31b of the main inner cylinder 31 and in the front portion 60a of the tail joint 60, and the connection plate 63 is connected to the connection plate reception spaces 31c, 62. It is received so as to be able to move back and forth across the inside, and the tip of the connection plate 63 enters the connection reception space 62 under the bias of the spring 64. Thereby, the main inner cylinder 21 and the tail joint 60 are connected via the connecting plate 63 so as to rotate integrally. The tail joint 60 is formed with a jig insertion hole 60d penetrating into the connecting plate receiving space 62 from the rear end of the rear portion 60c.

  When the lock 2 configured as described above is used by being mounted on a lock object, a lock member (not shown) is first attached to the tail portion 6 connected to the inner cylinder 30. For this reason, a male screw is formed on the outer periphery of the rear portion 60c of the tail portion 6, and the lock member is screwed onto the rear portion 60c of the tail portion 6 and attached. Further, the outer cylinder 20 is attached to the object to be locked. Then, by inserting the insertion portion 12 of the key 1 into the key insertion hole 35 and rotating the inner cylinder 30, the lock member attached to the tail portion 6 is rotated, and this is engaged with the engaged portion of the lock object. The lock member is locked (locked), and the lock member is reversely rotated to unlock (unlock).

The locking and unlocking operations with the key 1 will be described. In the locked state in which the key 1 is removed from the lock 2, as shown in FIG. 8, the lock part 45 b of the upper side bar 45 enters the upper lock groove 22 a of the outer cylinder member 21, and the protrusion 45 a of the second tumbler 44 The upper side bar 45 is restricted from moving downward while facing the upper surface, the lower side bar 55 has the lock portion 55b entering the lower lock groove 22b of the outer cylinder member 21, and the protrusion 55a is the lower surface of the second tumbler 54. The lower side bar 55 is restricted from moving upward. For this reason, the lock portions 45b and 55b of the upper and lower side bars 45 and 55 are positioned across the shear plane (share line), the rotation of the inner cylinder 30 with respect to the outer cylinder 20 is restricted, and the lock member is The locked state engaged with the engaged portion of the lock object is maintained.

  From this state, the insertion portion 12 of the key 1 is inserted into the key insertion hole 35. At this time, the insertion portion 12 can be inserted only in the direction in which the erroneous insertion prevention protrusion 15 is fitted into the erroneous insertion prevention groove 35a, and the insertion portion 12 is prevented from being erroneously inserted upside down. As shown in FIG. 6, the half-insertion preventing tumbler 36 in a state where the insertion portion 12 is half-inserted into the key insertion hole 35 is shown in FIG. In this state, since the half-insertion preventing tumbler 36 is urged to the right by the spring 37, the prevention projection 36 a is fitted in the half-insertion prevention groove 21 a of the outer cylinder member 21. The engaging portion 36b is close to the left end surface of the insertion portion 12 of the key 1. Thus, when the prevention protrusion 36a is inserted into the half-insertion prevention groove 21a, the prevention protrusion 36a is positioned across the shear plane (share line), and the inner cylinder 30 is placed in the outer cylinder 20 with the key 1 half-inserted. To prevent relative rotation.

  FIG. 9 shows the positional relationship between the first and second tumblers 43, 44, 53, 54 and the upper and lower side bars 45, 55 when the key 1 is half inserted. When the insertion portion 12 of the key 1 is inserted into the key insertion hole 35, the engagement legs 43 a and 53 a of the first tumblers 43 and 53 protruding into the key insertion hole 35 enter the key groove 13. The key groove 13 is composed of upper and lower key grooves 13 a and 13 b formed independently on the upper and lower surfaces of the insertion portion 12. As shown in FIG. 11, these key grooves 13a and 13b have a width for receiving the engaging legs 43a and 53a and are formed in a predetermined shape, and the engaging legs are engaged according to the insertion portion 12 being inserted. The first tumblers 43, 53 are moved to the left and right through 43a, 53a corresponding to the shapes of the key grooves 13a, 13b. Here, since the second tumblers 44 and 54 are engaged with the first tumblers 43 and 53 by the engagement of the connecting legs 44 b and 54 b and the connecting grooves 43 c and 53 c, the second tumblers 44 and 54 are engaged with the first tumbler 43. , 53 are moved left and right together. As a result, the first and second tumblers 43, 44, 53, 54 are moved, for example, to the left from the position shown in FIG. 8 to the position shown in FIG. In this state, the lock portion 45b of the upper side bar 45 enters the upper lock groove 22a of the outer cylinder member 21, and the protrusion 45a faces the upper surface of the second tumbler 44 so that the upper side bar 45 moves downward. The lower side bar 55 has the lock portion 55b entering the lower lock groove 22b of the outer cylinder member 21, and the protrusion 55a is restricted from moving upward with the lower side bar 55 facing the lower surface of the second tumbler 54. It has been done. For this reason, the lock portions 45 b and 55 b of the upper and lower side bars 45 and 55 are positioned across the shear plane (share line), and the rotation of the inner cylinder 30 relative to the outer cylinder 20 remains restricted.

  When the key 1 is further pushed and completely inserted into the key insertion hole 35 as shown in FIG. 10, the release protrusion 14 of the insertion portion 11 of the key 1 comes into contact with the engagement portion 36b and resists the bias of the spring 37. Then, the half-insertion preventing tumbler 36 is moved to the left. As a result, as shown in FIG. 11, the prevention protrusion 36 a is detached from the half insertion prevention groove 21 a of the outer cylinder member 21 (moves to the inside of the shear plane), and the outer cylinder 20 of the inner cylinder 30 by the half insertion prevention tumbler 36. Release the relative rotation restriction in the interior.

Further, as the insertion portion 12 is inserted to the complete insertion position, the first tumblers 43 and 53 are moved to the left and right according to the shape of the key groove 13 via the engaging legs 43a and 53a, and together with this, The second tumblers 44 and 54 are also moved left and right. As a result, when the key 1 is completely inserted, as shown in FIG. 12, the bar receiving grooves 44a and 54a of the second tumblers 44 and 54 are vertically opposed to the protrusions 45a and 55a of the upper and lower side bars 45 and 55. It becomes a state. In order to achieve such a state, the shape of the key groove 13, the connecting legs 44b and 54b, and the connecting grooves 43c,
The engagement position 53c is set, and this setting differs for each disc tumbler lock DTK.

  When the key 1 is rotated clockwise as shown in FIG. 13 (a) from this state, the upper and lower side bars 45 and 55 become tapered surfaces of the lock portions 45b and 55b as shown in FIGS. The protrusions 45a and 55a are pushed down along the taper surfaces of the upper and lower lock grooves 23a and 23b, and the protrusions 45a and 55a enter the bar receiving grooves 44a and 54a to allow the inner cylinder 30 to rotate with respect to the outer cylinder 20. In this way, the key 1 can be rotated to rotate the inner cylinder 30, whereby the tail portion 6 connected to the inner cylinder 30 via the connecting plate 63 can be rotated together. The lock member is attached to the tail portion 6 as described above, and the lock member can be rotated together with the tail portion 6 and can be locked (locked) by being engaged with the engaged portion of the object to be locked. . Further, the key 1 can be reversely rotated counterclockwise, and the lock member can be reversely rotated to unlock (unlock).

  As shown in FIG. 15, an angle restriction cam 65 is fixed to the intermediate portion 60 b of the tail joint 60, and angle restriction when the inner cylinder 30 is rotated by the key 1 is performed. Specifically, the angle restricting cam 65 has restricting protrusions 65a and 65b formed at a predetermined angular interval, and a restricting protrusion in which a part of the rear portion of the outer cylinder member 21 protrudes rearward therebetween. The portion 21e is positioned. As shown in FIG. 12 (a), at the start of rotating the inner cylinder 30 and the tail portion 6 by turning the key 1 from the state in which the key 1 is completely inserted, the angle regulating cam 65 has the positional relationship shown in FIG. It is possible to rotate 1 clockwise (counterclockwise in FIG. 15). This rotation is possible until the restricting projection 65b comes into contact with the restricting protrusion 21e, and allows the inner cylinder 30 and the tail portion 6 to rotate about 90 degrees. This angle range is a normal operation range in which locking / unlocking is performed. The rotation start position when the key 1 is inserted is referred to as a locking position, and the position rotated 90 degrees is referred to as an unlocking position. On the other hand, even if it is attempted to rotate the key counterclockwise (clockwise in FIG. 15) from the state shown in FIG. 15 (the rotation start position when the key 1 is inserted), the restricting protrusion 65a contacts the restricting protrusion 21e. The inner cylinder 30 cannot be rotated in the counterclockwise direction.

  The structure and operation of the disc tumbler lock DTK has been described above. In this disc tumbler lock DTK, the key 1 is changed without changing the lock 2, and the key 1 used so far is no longer used. It is a configuration that can be used. This key code conversion will be described below.

  The key code conversion is performed using a conversion jig 7 (see FIG. 3). As described above, in a state where the key 1 is completely inserted into the key insertion hole 35 (the state shown in FIGS. 4 and 8), the handle 71 of the conversion jig 7 is held by a finger and the rod-like portion 71 located at the tip is tailed. The joint 60 is inserted into the jig insertion hole 60d. FIG. 16 shows a state in which the rod-like portion 71 is completely inserted into the jig insertion hole 60d. At this time, the tip of the rod-like portion 71 comes into contact with the rear end of the connecting plate 63 to resist the bias of the spring 64. Then, the connecting plate 63 is moved forward. As a result, the connecting plate 63 comes out of the connecting receiving space 62 and enters the connecting plate receiving space 31c of the main inner cylinder 31, and the connection between the main inner cylinder 31 and the tail join 60 is released. In this state, the key 1 is rotated 180 degrees to the position shown in FIG. At this time, since the connection by the connecting plate 63 is released, the tail joint 60 does not rotate while being fixed, and only the inner cylinder 30 and the connecting plate 63 rotate. Further, since the angle restriction cam 65 does not rotate, the angle restriction does not act, and the inner cylinder 30 can be rotated beyond 90 degrees to 180 degrees. The position where the inner cylinder 30 is rotated 180 degrees in this way is referred to as a key code conversion position. However, an angle restricting means is provided on the inner cylinder 30 so as to restrict the reverse rotation and the rotation exceeding 180 degrees, but this is not shown.

When the inner cylinder 30 is rotated 180 degrees with the key 1 as described above, as shown in FIG.
The upper sub inner cylinder 40 is positioned on the lower side, and the lower sub inner cylinder 50 is positioned on the upper side. At this time, the upper side bar 45 is located directly below and faces the lower lock groove 22b, and the lower side bar 55 is located directly above and faces the upper lock groove 23b, but one side bar is locked at the front and rear ends. Located on the outside of the groove, the center portion of the other side bar is restrained by a side bar restraint 29 (see FIG. 16) so as not to enter any of the lock grooves 23a, 23b. The connection plate receiving spaces 31c and 62 are formed at positions eccentric from the rotation center of the inner cylinder 30. When the inner cylinder 30 and the connection plate 63 are rotated 180 degrees, the connection plate 63 is connected to the tail joint 65. The plate receiving space 62 is shifted laterally according to the amount of eccentricity, and even if the conversion jig 7 is removed, the connecting plate 63 cannot enter the connecting plate receiving space 62 and moves forward as shown in FIG. Is kept in the same state.

  As described above, the upper sub inner cylinder 40 and the lower sub inner cylinder 50 are urged rearward by the springs 42 and 52, and the rear end of the upper sub inner cylinder 40 is in a state before the key 1 is rotated 180 degrees. The portion is in contact with the first abutting surface 28a that is lowered rearward on the front surface of the partition wall 28, and the rear end portion of the lower sub inner cylinder 50 is in contact with the second abutting surface 28b that is positioned forward. When the inner cylinder 30 is rotated up to 180 degrees from this state, the rear end portion of the upper sub inner cylinder 40 comes into contact with the second contact surface 28b from the first contact surface 28a through the tapered surface 28c (however, The first contact surface 28a is formed so that the rear end portion of the upper sub-inner cylinder 40 remains in contact with the first contact surface 28a when rotated 90 degrees within the normal use range). As a result, the upper sub inner cylinder 40 moves forward relative to the main inner cylinder 31 by the difference in height between the contact surfaces 28a and 28b. Similarly, when the inner cylinder 30 is rotated up to 180 degrees, the rear end portion of the lower sub inner cylinder 50 comes into contact with the first contact surface 28a from the second contact surface 28b through the tapered surface 28c. The sub inner cylinder 50 moves backward relative to the main inner cylinder 31 by the difference in height.

  When the upper sub inner cylinder 40 moves forward, the second tumbler 44 received in the second tumbler receiving groove 41 of the upper sub inner cylinder 40 also moves forward together, and the first tumbler receiving groove of the main inner cylinder 31 is moved forward. The first tumbler 43 received at 32 is moved forward. The difference in height is slightly larger than the thickness of the first tumblers 43 and 53 and the second tumblers 44 and 54, and the second tumbler 44 is separated forward from the first tumbler 43 as shown in FIG. It becomes the state. That is, the engagement between the connection groove 43c of the first tumbler 43 and the connection leg 44b of the second tumbler 44 is released. At this time, the connecting leg 44b of the second tumbler 44 enters the locking holding groove 32a formed on the upper mounting surface of the main inner cylinder 31, and moves to the left and right by the locking holding groove 32a as shown in FIG. Is held in a regulated state. Similarly, the connection groove 53c of the first tumbler 53 and the connection leg 54b of the second tumbler 54 are disengaged, and the connection leg 54b of the second tumbler 54 is formed on the lower mounting surface of the main inner cylinder 31. It enters the stop holding groove 33a and is held in a state in which the left and right movements are restricted by the locking and holding groove 33a.

  Next, the key 1 is removed from the key insertion hole 35. At this time, the first tumblers 43 and 53 can be moved left and right in the first tumbler receiving groove 32 and are moved to the left and right in correspondence with the key groove 13 of the key 1 to allow the key 1 to be extracted as it is. At this time, the connecting leg 44b of the second tumbler 44 is held in a state in which the right and left movement is restricted by the locking holding groove 32a, and the right and left movement of the connecting leg 54b of the second tumbler 54 is restricted by the holding holding groove 33a. Is held in the state.

Then, a new key 1 ′ provided with a new key groove 13 ′ is prepared, and the insertion portion 12 ′ is inserted into the key insertion hole 35. As a result, the first tumblers 43 and 53 are moved to the left and right in accordance with the new keyway 13 ′, and when the new key 1 ′ is completely inserted, the first tumblers 43 ′ are first positioned at positions corresponding to the keyway 13 ′ of the key 1 ′. The tumblers 43 and 53 are positioned. Next, the key 1 ′ is rotated 180 degrees in the opposite direction from the key code conversion position, returned to the original position (locking position), and the conversion jig 7 is removed. Then, the connecting plate 63 receives the bias of the spring 64 and enters the connecting plate receiving space 62 of the tail joint 65, and the state shown in FIG. 4 is established, and the inner plate 30 and the tail portion 6 are connected by the connecting plate 63. Is done.

  Further, when the key 1 ′ is rotated 180 degrees in the reverse direction as described above and the inner cylinder 30 is returned to the original position, the rear end portion of the upper sub-inner cylinder 40 is changed from the second contact surface 28b to the tapered surface 28c. Then, the upper sub inner cylinder 40 moves rearward with respect to the main inner cylinder 31. At this time, the positional relationship between the second tumbler 44 and the first tumbler 43 changes as shown in FIG. 20B to FIG. 20A, and the connection groove 43 c of the first tumbler 43 and the second tumbler 44 are connected. The legs 44b are engaged again. Since the connecting leg 44b of the second tumbler 44 is held in a state in which the right and left movement is restricted by the locking holding groove 32a, its position does not change, and the connecting leg 43b of the first tumbler 43 The connecting leg 44b of the second tumbler 44 can be smoothly re-engaged. Similarly, the rear end portion of the lower sub-inner cylinder 50 returns from the first contact surface 28 a to the state of contact with the second contact surface 28 b via the tapered surface 28 c, and the lower sub-inner cylinder 50 is in contact with the main inner cylinder 31. Move forward. Thereby, the connection groove 53c of the first tumbler 53 and the connection leg 54b of the second tumbler 54 are engaged again. Also in this case, since the connecting leg 54b of the second tumbler 54 is held in a state in which the right and left movement is restricted by the locking holding groove 33a, the position thereof does not change, and the connecting of the first tumbler 53 The groove 53c and the connecting leg 54b of the second tumbler 54 can be smoothly re-engaged.

  As described above, when the new key 1 ′ is inserted into the key insertion hole 35 and rotated 180 degrees in the reverse direction and returned to the original position, the state shown in FIG. 12 is obtained corresponding to the key groove 13 ′ of the new key 1 ′. The key code corresponds to the new key 1 ′. Thereafter, when the key 1 'is pulled out, the first tumblers 43, 53 and the second tumblers 44, 54 are moved to the left and right according to the key groove 13', resulting in the state shown in FIG. It will be in the state.

  The configuration and operation for converting the key code so as to correspond to the new key 1 'using the lock 2 as it has been described above. In this case, key grooves 13 ′ are provided independently on the upper and lower surfaces of the insertion portion 12 ′ of the key 1 ′, and the first and second tumblers 43, 53, respectively of the upper sub inner cylinder 40 and the lower sub inner cylinder 50 are provided. Since the engagement positions of 44 and 54 (the engagement positions of the coupling groove 53c and the coupling leg 54b) can be set independently of each other, without increasing the longitudinal dimensions of the outer cylinder 20 and the inner cylinder 30, The number of key code conversions can be increased.

  In the above description, the configuration in which two sub inner cylinders (upper and lower sub inner cylinders 40 and 50) are provided above and below the main inner cylinder 31 has been described as an example. However, the present invention is not limited to this configuration. For example, three sub inner cylinders may be provided on the outer periphery of the main inner cylinder at equal intervals (120 degree intervals). In this way, the key code conversion is performed while suppressing the axial length of the cylinder lock. The number can be increased further.

  In the above embodiment, the disk tumbler lock has been described as an example. However, the cylinder lock targeted by the present invention is not limited to this, and other types of cylinder locks such as a pin tumbler type cylinder lock are also targeted. It will be.

DTK cylinder lock 1 key 13 keyway 2 lock 20 outer cylinder 30 inner cylinder 31 main inner cylinder 40 upper sub inner cylinder 50 lower sub inner cylinder 43,53 first tumbler 44,54 second tumbler 45,55 upper and lower sidebar 6 Tail part 60 Tail joint 63 Connecting plate 65 Angle regulating cam 7 Conversion jig

Claims (3)

A lock provided with an inner cylinder having a key insertion hole, an outer cylinder that accommodates and holds the inner cylinder in a relatively rotatable manner, a lock mechanism that restricts and releases the relative rotation of the inner cylinder with respect to the outer cylinder, and the key insertion In the cylinder lock composed of a key inserted into the hole and releasing the restriction of the relative rotation by the lock mechanism,
The lock mechanism has a key code structure that operates in cooperation with a key action part of a key inserted into the key insertion hole, and the key code structure is only for a predetermined key code of a key action part of a predetermined key. And is configured to release the restriction of the relative rotation by the lock mechanism in cooperation with the key action portion,
A cord release means capable of releasing the cooperative operation of the key operating portion and the key code structure by an external operation, or returning the state to the cooperative operation;
After the cooperative operation is canceled by the code releasing means from the state where the predetermined key is inserted into the key insertion hole, and a different key having a different key code is inserted into the key insertion hole instead of the predetermined key When the cooperative operation is restored by the code releasing means, the key code structure operates in cooperation with the key action part only for the different key codes, and the restriction of the relative rotation by the lock mechanism is released. The key code is converted so that
A plurality of the lock mechanisms having the key code structure are provided at different positions on the circumferential direction of the inner cylinder ,
The inner cylinder is composed of a main inner cylinder having the key insertion hole and a plurality of sub inner cylinders arranged at a plurality of locations on the outer peripheral portion of the main inner cylinder,
Each of the plurality of mounting surfaces on which the plurality of sub inner cylinders of the main inner cylinder are mounted is received and arranged in a first tumbler receiving groove formed extending in the direction perpendicular to the axis so as to be movable in the direction perpendicular to the axis. A plurality of first tumblers, a second tumbler that is received and arranged in a second tumbler receiving groove formed extending in a direction perpendicular to the axis of each of the plurality of sub-inner cylinders so as to be movable in a direction perpendicular to the axis; The lock mechanism is composed of side bars that are urged and arranged on the outer peripheral side of the sub inner cylinders,
The first tumbler has an engagement leg projecting into the key insertion hole on the inner diameter side and is detachably engaged with the inner diameter side of the second tumbler on the outer diameter side, and the second tumbler is on the outer diameter side. A bar receiving groove for receiving the side bar is formed;
A lock portion formed on the outer diameter side of the side bar enters a lock groove formed in a peripheral surface of a housing space for housing and holding the inner tube in the outer tube, and rotates the inner tube with respect to the outer tube. The protruding portion formed on the inner diameter side of the side bar enters the bar receiving groove, and the lock portion is separated from the lock groove to allow the inner cylinder to rotate with respect to the outer cylinder. Cylinder lock characterized by being made . A key operating portion of a key inserted into the key insertion hole engages with the engagement leg of the first tumbler, and the first tumbler is axially orthogonal in the first tumbler receiving groove in response to the insertion of the key. The second tumbler is moved in the direction perpendicular to the axis in the second tumbler receiving groove together with the first tumbler;
In the position where the second tumbler moves perpendicular to the axis, which is determined by inserting a key having a predetermined key code corresponding to the key code structure, the bar receiving groove faces the protrusion of the side bar and the protrusion The cylinder lock according to claim 1 , wherein it is possible to enter the bar receiving groove. The cord release means is configured to release the engagement between the first tumbler and the second tumbler,
In a state where a first key having a first key code corresponding to the key code structure is inserted and the first and second tumblers are positioned at predetermined moving positions, the code releasing means performs the first The first tumbler is disengaged from the second tumbler, a second key having a second key code is inserted in place of the first key, and the first tumbler is inserted through the engaging leg. After moving in the direction perpendicular to the axis, the key code structure is applied only to the second key code by re-engaging the first tumbler and the second tumbler by the code releasing means. The cylinder lock according to claim 1 , wherein the cylinder lock is configured to be converted so as to release the restriction of the relative rotation by the lock mechanism in cooperation with a portion.

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