JP4535315B2 - Variable lever tumbler lock - Google Patents

Description

  The present invention relates to a variable lever tumbler lock, and more particularly, to a variable lever tumbler lock that can rationally change a key difference conversion mechanism to simplify the structure and reduce the outer dimensions.

  The present applicant has previously proposed a novel variable lever tumbler lock with Patent Documents 1 to 5 described later.

  In these variable lever tumbler locks, each lever tumbler of the lever tumbler lock is a combination of a tumbler A and a tumbler B that are superposed on each other in a substantially C-shape, while a support shaft protrudes from both ends. The tumbler A, which is supported so as to be able to rotate around the axis of the core shaft and has one end loosely fitted to the support shaft, is formed with an engaging portion with a key groove of the key, and is attached in a direction that interferes with the key. In addition, an unlocking notch is formed at the outer edge of the free end of the tumbler B, one end of which is pivotably fitted to the support shaft, and the engagement portion with the engaging side edge of the tumbler A is overlapped The part to be molded is shaped so as not to interfere with the key, and on the other hand, the engagement protrusion is on the side opposite to the tumbler B on the inner edge of the tumbler A, and the support shaft is centered on the inner edge of the tumbler B. Engagement protrusions of tumbler A on the arc A plurality of possible engaging recesses are formed, and the forming angular positions of the engaging recesses are respectively engaged with the engaging portions of the tumbler A in a plurality of types of key grooves formed on the side edge of the key. When this is done, it is set to align with the engaging projection, and on the other hand, the support shaft is urged outward, while the inner end of the inner cylinder can be moved in the radial direction of the inner cylinder and can be operated from the outside. A simple switch member is provided so as to be able to abut on this from the outside of the support shaft.

  And in order to understand this invention, it is necessary to understand the structure of the said variable lever tumbler lock, Since the structure is described in said each patent document, it demonstrates easily here.

  In FIG. 1, reference numeral 1 denotes a lever tumbler. The lever tumbler 1 is a combination of a tumbler A1A and a tumbler B1B that are superposed on each other in a substantially C shape, and a support shaft biased upward in the figure. 2 is supported so that it can rotate around the axis of an eccentric shaft 3 (see FIG. 2) protruding from both ends thereof.

  In FIG. 1, the tumbler B1B is hatched only so as not to be confused with the tumbler A1A, and is not actually hatched. In FIG. 1, the tumbler B1B is disposed on the near side, and the tumbler A1A is disposed on the back side thereof.

  In addition, the C-shaped tumbler A1A shown in FIG. 1 has its open ends connected to each other, but this is to increase the rigidity of the tumbler. Included in the concept of glyph.

On the other hand, interfere with the tumbler A1A which one end is fitted Yu the support shaft 2 via the elongated relief hole 4, to form the engagement portion 7 of the keyway 6 of duplicate key 5, which the master key 5 1 is formed in the outer edge of the free end portion of the tumbler B1B that is urged counterclockwise in FIG. The portion overlapping with the engaging portion 7 with the key-side end edge is molded so as not to interfere with the key.

  On the other hand, the first engaging projection 9 is formed on the inner edge of the tumbler A1A facing the tumbler B1B, and the inner edge of the tumbler B1B is formed on the arc of the tumbler A centered on the support shaft 2. A plurality of engagement recesses 11 that can engage with the first engagement protrusions 9 are formed, and the formation angular positions of the engagement recesses 11 are formed at a plurality of types of depths formed on the side edge of the key 5. When the engaging portions of the tumbler A are engaged with the grooves 6, the setting is made so as to align with the engaging protrusions.

  FIG. 1 shows a state in which one key is inserted into the keyhole, so that the unlocking notch 8 is angularly aligned with the locking bar 12.

  In this state, as shown in FIGS. 2 and 3, the conversion pin 13 is inserted from the inner end side of the cylinder, and is supported via the switch member 14 and the spacer ring 15 fitted to the inner end of the support shaft 2. When a force in the direction of the arrow, that is, a downward force is applied to the shaft 2, the support shaft 2 rotates around the central axis c of the eccentric shaft 3 in the counterclockwise direction.

  In FIG. 1, since the tumbler 1 is viewed from the inner end side of the cylinder, in FIG. 1, the support shaft 2 rotates around the central axis c in the clockwise direction.

  As a result, the support shaft 2 loosely fits the vertically long escape hole 4 formed at one end of the tumbler A1A, so that only the tumbler B11B is lowered with the tumbler A left in the position of FIG. 1 (not shown). .

  As is clear from FIG. 1, the unlocking notch 8 and the locking bar 12 are angularly aligned, so that the tumbler B1B can be lowered, and the first engaging projection 9 of the tumbler A1A is the engaging recess. 11 is removed.

  In this state, one key can be removed, so when one key is removed from the keyhole, the tumbler A1A is rotated counterclockwise in FIG. By inserting the correct key, the tumbler A1A is rotated to a new angular position different from that in FIG.

In this state, when the conversion pin 13 (see FIG. 3) is pulled out and the support shaft 2 is returned to the original position, the tumbler B1B is also moved back to the position shown in FIG. In engaging with the recess, the manner of engagement between the tumbler A1A and the tumbler B1B is different from the previous one, and therefore the key difference can be changed.
JP2003-184366 JP2003-213888 JP2003-307057 JP 2003-314104 A JP 2003-321958 A JP 2005-155195 A

  As shown in FIG. 4, the variable lever tumbler lock having the above-described structure has a bulging portion 17 protruding from the base portion of the outer cylinder 16, and the switch member 14 is placed in the bulging portion 17 in the vertical direction in FIG. A guide cave 18 that can be guided is provided.

  In addition, the bulging part formed below the outer cylinder in FIG. 4 is a bulging part provided because it is necessary for design, and is not an essential component of the variable lever tumbler lock.

  However, the bulging part formed in the outer cylinder complicates the structure of the variable lever tumbler lock because of its existence, and the processing of the outer cylinder becomes troublesome, and in addition, it is disadvantageous in design, etc. Cause inconvenience.

  Therefore, the present applicant has previously proposed a variable lever tumbler lock that can rationally change the key difference conversion mechanism and eliminate the need to form a bulging portion in the outer cylinder, using the above-mentioned Patent Document 6.

  The object of the present invention is to further improve the invention proposed by the above-mentioned Patent Document 6 and further improve the efficiency of the key difference conversion work.

  In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that each lever tumbler of the lever tumbler lock is a combination of tumbler A and tumbler B which are superposed in a substantially C shape, The support shaft that is urged so that the axis is directed outward can be supported so that it can rotate around the axis of the eccentric shaft that protrudes from both ends, and the relief hole that opens at one end can be loosely fitted to the support shaft. The tumbler A engaged with the key is formed with an engaging portion with the key groove of the key, and is biased in a direction that interferes with the key, and one end is rotatably fitted to the support shaft. The unlocking notch is formed on the outer edge of the free end portion of the tumbler B, and the portion that overlaps the engaging portion with the key side edge of the tumbler A is molded so as not to interfere with the key lock. On the side facing the tumbler B at the inner edge of the end, Further, on the inner edge of the tumbler B, a plurality of engaging recesses that can be engaged with the engaging protrusions of the tumbler A are formed on an arc centered on the support shaft, respectively, and the forming angular position of the engaging recess is defined as follows: When the engaging portions of the tumbler A are engaged with a plurality of types of key grooves having different depths formed on the side edge of the key, the inner ends of the support shafts are set so as to be aligned with the engaging protrusions. A large-diameter flange is formed in the outer peripheral surface, and a working hole is formed on the outer peripheral surface of the outer cylinder that is aligned with the large-diameter flange in the axial direction. Recesses are formed on the outer side surfaces of the cylinders, and on the other hand, adapters that are partly semi-circular in shape are provided so that they can be joined to the outer cylinders. When pivoted, the center part can be pivoted on a pivot that is parallel to the center axis of the outer cylinder. A latch lever biased in a direction in which the tip engages with the recessed portion is mounted symmetrically, while the adapter is guided by the adapter so as to be movable in the outer cylinder radial direction, and the inner end is inserted through the work hole. And a switch member that can be brought into contact with the large-diameter flange portion of the support shaft. The switch member extends outside the switch member in the axial direction of the outer cylinder and is guided so as to be movable in the length direction. A short cylindrical operation end is formed at the center, and there is provided a conversion member that forms an inclined surface that engages with the switch member and pushes it inward by a wedge action. The adapter is detachably attached to the outer cylinder, and the switch member is moved inward by pushing the operation end of the conversion member, and the large-diameter collar portion of the support shaft is pushed inward by the inner end. The engagement protrusion of the tumbler A and the engagement recess of the tumbler B are separated. It is characterized by.

In the invention according to claim 2, each lever tumbler of the lever tumbler lock is a combination of tumbler A and tumbler B, which are superposed on each other in a substantially C shape, while the central axis is directed outward. The tumbler is supported so that it can rotate around the axis of the eccentric shaft protruding at both ends, and the relief hole opened at one end is engaged with the support shaft so that it can be loosely fitted. In A, an engaging portion with the keyway of the key is formed, and this is urged in a direction that interferes with the key, and one end of the tumbler B is rotatably fitted to the support shaft. An unlocking notch is formed in the outer end edge, and a portion overlapping with the engaging portion of the tumbler A on the key side edge is molded so as not to interfere with the key key, while the inner end portion of the free end portion of the tumbler A is formed. Engagement protrusions on the side facing tumbler B, A plurality of engagement recesses that can engage with the engagement protrusions of the tumbler A are formed on the arcs around the support shaft on the side edge portions, and the formation angular positions of the engagement recesses are set according to the side edge of the key. When the engaging portions of the tumbler A are respectively engaged with the key grooves having a plurality of types of depths formed on the inner surface of the support shaft, the large diameter rod Forming a working hole penetrating in the radial direction of the outer cylinder on the outer peripheral surface of the outer cylinder aligned with the large-diameter flange in the axial direction, and on both outer surfaces of the outer cylinder in the vicinity of the working hole. Each adapter is formed with a recessed part, and on the other hand, adapters that are partly shaped in a semicircular cross section are provided so that they can be joined across the outer cylinder. The center part is pivotally supported by a pivot shaft that is parallel to the center axis of the cylinder, and the tip is recessed. On the other hand, the latch lever urged in the direction to engage is symmetrically mounted, and on the other hand, the adapter is guided so as to be movable in the radial direction of the outer cylinder, and the inner end is inserted through the working hole and the large diameter of the support shaft A switch member is provided to be able to come into contact with the collar portion. The switch member extends outside in the axial direction of the outer cylinder and is guided so as to be movable in the length direction. In the middle part, a conversion member is formed that has an inclined surface that engages with the switch member and pushes it inward by the wedge action. When changing the key, the adapter is removed from the outer cylinder via the latch lever. The switch member is moved inward by pushing the operating end of the conversion member, and the large-diameter collar portion of the support shaft is pushed inward by the inner end to engage the projection of the tumbler A. And the engagement recess of the tumbler B are separated from each other, and the above in the inner cylinder An insertion hole that is loosely fitted to the support shaft is opened near the large-diameter flange of the support shaft, and an engagement projection is provided at the lower end edge. When inserting the key into the key hole, an inclined edge of the key end A control plate that is pushed outward by the wedge action generated by the engagement between the switch member and the engagement protrusion is provided so as to be movable in the moving direction of the switch member, and is converted to an outer end portion in the vicinity of the switch member in the adapter. A locking hole that loosely fits with the tip of the member is opened, and a retaining plate that is biased in a direction in which the locking hole engages with a locking groove formed outside the tip of the conversion member is movable in the outer cylinder radial direction while joined to the outer edge of the edge control plate, when the key difference conversion, during it to work if Kagi及 beauty not insert a new duplicate key in keyhole of omission Even if the locking hole of the stop plate is engaged with the locking groove of the conversion member, and the hand is released from the conversion member, the switch member remains in the operating position. Characterized in that to be able to stop.

  Furthermore, in the invention described in claim 3, each lever tumbler of the lever tumbler lock is a combination of tumbler A and tumbler B, which are superposed on each other in a substantially C shape, while the central axis is outward. The support shaft biased so as to face is supported so that it can rotate around the axis of the eccentric shaft projecting at both ends, and the relief hole opened at one end is engaged with the support shaft so as to be freely fitted. The tumbler A is formed with an engagement portion with the keyway of the key, and is urged in a direction that interferes with the key, and the free end of the tumbler B having one end rotatably fitted to the support shaft An unlocking cutout is formed on the outer edge of the tumbler A, and a portion overlapping with an engagement portion of the tumbler A with the key side edge is formed so as not to interfere with the key, while the inner edge of the tumbler A free end portion Engagement protrusions on the side facing tumbler B, and tumbler A plurality of engaging recesses that can engage with the engaging protrusions of the tumbler A are formed on the inner edge of the tumbler A on an arc centered on the support shaft, respectively. When the engaging portion of the tumbler A is engaged with each of a plurality of types of key grooves formed at the edges, the inner end portion of the support shaft has a large diameter. Forming a working hole that penetrates the outer cylinder in the radial direction of the outer cylinder on the outer cylinder outer peripheral surface that forms a flange and aligns with the large diameter flange in the axial direction, and both outer surfaces of the outer cylinder in the vicinity of the working hole When each adapter is formed with a semi-circular cross section so that it can be joined to the outer cylinder, and the outer cylinder is straddled on both sides of the adapter, The center part is pivotally supported by a rotation shaft that is parallel to the center axis of the outer cylinder, and the tip is the above A latch lever biased in a direction to engage with the recessed portion is mounted symmetrically, and on the other hand, the adapter is guided so as to be movable in the radial direction of the outer cylinder, and the inner end is inserted through the working hole and A switch member that faces the large-diameter collar is provided, extends outside the switch member in the axial direction of the outer cylinder, is guided to be movable in the length direction, and has a short cylindrical shape at the base end. An operation end is formed, and a conversion member is formed in the center that engages with the switch member and forms an inclined surface that pushes it inward by the wedge action. The switch member is moved inward by pushing the operating end of the conversion member, and the large-diameter collar portion of the support shaft is pushed inward by the inner end to engage the tumbler A. The mating protrusion and the engagement recess of the tumbler B are separated from each other, and the conversion member A flange portion with a width smaller than the outer diameter of the operation end is connected to the inside of the cylindrical operation end, and the position of the operation end of the latch lever in the normal state is set to the same position as the flange portion. At the same time, set the operation end so that it is close to the side edge of the flange, and when changing the key, attach the adapter to the cylinder outer cylinder and move the conversion member. The relative position with respect to the member is moved to the large diameter part of the operation end, and the operation end of the latch lever is pushed inward so that the engagement between the tip of the latch lever and the recessed part of the outer cylinder cannot be released. It is characterized by that.

  In the variable lever tumbler lock according to the first aspect of the present invention configured as described above, a switch member slidably guided to the outer cylinder to drive the support shaft is mounted on the outer cylinder at the time of key conversion. Since it was provided on the adapter side, it can be a simple cylinder without forming a bulging portion on the outer cylinder.

  Therefore, the structure of the variable lever tumbler lock can be made simple and compact, and the engagement protrusion of tumbler A and the engagement recess of tumbler B can be separated by simply attaching the adapter to the outer cylinder and operating the conversion member. Since the re-engagement action can be performed, the efficiency of the key difference conversion work is improved in each stage as compared with the invention described in Patent Document 6.

  According to the second aspect of the present invention, when the key is not inserted into the key hole, the retaining plate locks the conversion member at the operating position, so that it is possible to prevent malfunction during key-to-key conversion. .

  Furthermore, according to the third aspect of the present invention, when the key conversion is performed, when the conversion member is moved to the operating position, the latch lever does not move. It is possible to prevent an erroneous operation such as.

  Since the switch member and the conversion member that slide in the radial direction of the conventional outer cylinder are built in the adapter that is selectively attached to the outer cylinder, it is necessary to form a bulging portion on the outer cylinder of the variable lever tumbler lock In addition, the key conversion process has been made extremely easy.

  Embodiments of the present invention will be described below with reference to FIGS. In the first embodiment, an embodiment of the invention described in claim 1 will be described.

  In FIG. 5, reference numeral 16 denotes an outer cylinder of the variable lever tumbler lock. The outer cylinder 16 in the illustrated embodiment is connected to the outer cylinder 16 a of the plug assembly 20.

  A working hole 19 penetrating the outer cylinder 16a is formed at the base end portion of the outer cylinder 16a of the plug assembly at an angular position of 12 o'clock in terms of a clock face in FIG.

  The position of the working hole 19 in the outer cylinder axis direction is set to a position that aligns with the spacer ring 15 (see FIG. 2 and FIG. 3) fitted to the proximal end of the support shaft 2, and is shown in FIG. As described above, the spacer ring 15 (large diameter flange) is exposed from the working hole 19.

  Further, as shown in FIG. 5, on both outer side surfaces of the outer cylinder 16 in the vicinity of the working hole 19, an elongated flat surface portion 21 to be joined to a latch lever 23 (see FIG. 6) described later, and the tip of the latch lever. A concavity 22 is formed.

  On the other hand, the variable lever tumbler lock according to the present invention is provided with an adapter 24 shown in FIGS. 6 and 7 in order to facilitate the key difference conversion work.

  As shown in the figure, the adapter 24 is a block body in which a part (lower part) is formed in a semicircular cross-section (see FIG. 6) so as to straddle and join to the outer cylinder.

  The adapter 24 is supported on both sides of the adapter 24 by a rotation shaft 25 (see FIG. 6) which is parallel to the center axis of the outer cylinder when straddling the outer cylinder 16, and the center portion is rotatably supported (see FIG. 6). The latch levers 23 urged in the direction in which the lower ends are engaged with the recessed portions 22 are mounted symmetrically.

  Each latch lever 23 is biased clockwise in FIG. 6 by the torsion spring (not shown) wound around the rotation shaft 26 and counterclockwise in the left side in FIG.

  Accordingly, when the adapter 24 is brought close to the upper side with the latch levers 23, 23 aligned with the flat surface portion 21 and the recessed portion 22 shown in FIG. 5, the latch levers 23, 23 first come into contact with the outer cylinder 16, and these The latch levers 23 and 23 expand against the biasing force and move downward due to the wedge action generated therebetween.

  Then, as shown in FIG. 6, when the leading end of the latch lever is aligned with the recessed portion 22, the former is dropped into the latter by the urging force, and at the same time, the lower end of the adapter 24 is joined to the outer cylinder, Automatically attached to the outer cylinder.

  As shown in FIGS. 6 and 7, the adapter 24 is guided by a portion aligned with the working hole 19 (see FIGS. 5 and 7) so as to be movable in the radial direction of the outer cylinder. A switch member 14 is provided so as to be able to come into contact with the large-diameter flange portion 15 of the support shaft 2 through the shaft.

  Further, the switch member 14 extends outward (upward in FIGS. 6 and 7) in the horizontal direction, that is, in the outer cylinder axis direction, and is guided so as to be movable in the length direction, and serves as a push button at the base end. A conversion member 27 having a short columnar operation end 27a is provided.

  Furthermore, as shown in FIG. 7, an inclined surface 27b that engages with the switch member 14 and pushes it inward by a wedge action is formed on the inner surface facing the switch member 14 at the center of the conversion member 27. Has been.

  And this conversion member 27 is urged | biased rightward in FIG. 7 by the elasticity of the return spring 28 as a compression coil spring elastically mounted inside the flange part 27c (refer FIG.7 and FIG.9) mentioned later. However, in a state where no external force is applied to the operation end 27a, the flange 27c is locked to an unnumbered back plate so that the conversion member 27 does not jump out of the adapter.

  The variable lever tumbler lock according to one embodiment of the invention described in claim 1 configured as described above includes a tumbler in which a key 5 is inserted into a key hole 6 at the time of key difference conversion as shown in FIG. The unlock notch 8 of the BIB and the inner edge of the locking bar 12 are aligned.

  Next, when the adapter 24 is attached to the outer cylinder 16 as described above, as shown in FIG. 7, the inner end of the switch member 14 in the adapter passes through the work hole 19 and the large-diameter flange 15 (spacer ring) of the support shaft. ) To come into contact.

  At this time, the conversion member 27 and the inclined surface 27b, which is a part of the conversion member 27, are on the right side of the position shown in FIG. 7, and the switch member 14 has a large diameter flange 15 due to the elasticity of the support spring 33 (see FIG. 4). Is pushed upward from the position shown in FIG.

  Next, when the operation end 27a of the conversion member 27 is pushed so as to be pushed into the adapter with fingers, the lower end of the switch member 14 inserted through the work hole 19 is a large-diameter flange portion of the support shaft as shown in FIG. The outer peripheral edge of a certain spacer ring 15 is pushed downward against the elasticity of the support spring 33 (see FIG. 4).

  Therefore, the support shaft 2 slightly rotates clockwise around the eccentric shaft 3 (see FIGS. 2 and 3) in FIG. 8, and the tumbler B1B moves downward as the support shaft 2 rotates. Then, the engagement between the first engagement protrusion 9 and the engagement recess 11 is released.

  Next, when a new key is inserted, the tumbler A1A is rotated to an angular position corresponding to the keyway of the new key, so that when the hand is released from the operation end of the state converting member 27, the converting member 27 is elastic of the return spring 28. As a result, the switch member 14 moves to the right in FIG.

  Then, the tumbler B1B is raised by the elasticity of the support shaft spring 33, and any one of the engagement recesses 11 is engaged with the first engagement protrusion 9 at the new angular position, and thus the tumbler A1A and the tumbler B1B are The new relative angular position of is determined.

  In the first aspect of the invention described above, the operation end 27a of the conversion member must be continuously pushed with a finger during the key difference conversion operation. This is because when the conversion member 27 returns to the standby position, an unintended key difference may occur depending on the timing.

  Thus, in the second embodiment, when the key is not inserted into the keyhole, the operating position of the conversion member can be fixed, so that the tumbler B1B rises from the state shown in FIG. The invention according to claim 2, which can prevent a key difference that is impossible, will be described.

  As shown in FIGS. 6 and 7, a control plate 28 is guided in the inner cylinder in the vicinity of the large diameter flange 15 of the support shaft 2 so as to be movable in the outer cylinder radial direction, that is, in the vertical direction in the figure. .

  The outer edge of the control plate 28 is formed in an arc shape with the same curvature so that it can be joined to the inner surface of the outer cylinder 16, and an insertion hole 31 (see FIG. 6) that fits loosely with the support shaft 2 at the center. Is open.

  Further, a second engagement protrusion 32 is provided at the lower end edge of the control plate, and the second engagement protrusion 32 is formed on the tip of the key 5 and is inclined with respect to the insertion direction. When the key is inserted, the outer end edge is pushed to a position where it is joined to the inner peripheral surface of the outer cylinder.

  On the other hand, in the vicinity of the switch member 14 in the adapter, a retaining plate 35 having a locking hole 34 that loosely fits with the distal end portion of the conversion member 27 at the outer end portion is connected to the inner edge of the control plate 29. It is provided so as to be movable in the radial direction of the outer cylinder while being joined to the outer edge.

  Correspondingly, as shown in FIG. 7, a locking groove 27 c is formed on the outer side of the distal end portion of the conversion member 27.

  The retaining plate 35 is a plate material obtained by bending the plate material as shown in FIGS. 6 and 7 and cutting and raising the spring receiving plate 37. The compression coil is elastically mounted between the spring receiving plate 37 and the adapter. Due to the elasticity of the biasing spring 37 as a spring, the locking hole 34 is biased in a direction to engage with the locking groove 27c.

  The variable lever tumbler lock according to one embodiment of the invention described in claim 2 configured as described above is shown in FIGS. 6 and 7 when a previous key or a new key is inserted into the keyhole. Thus, the control plate 29 is pushed outward by the tip of the key, and the retaining plate 35 is also pushed outward by this control plate.

  Therefore, the retaining hole 34 of the retaining plate is separated from the retaining groove 27c of the conversion member, and the conversion member 34 is free. Therefore, the conversion member 27 can be simply released from the operation end after inserting a new key. Can be returned to the standby position.

  On the other hand, after removing the previous key, the locking hole 34 of the retaining plate engages with the locking groove 27c of the conversion member and the conversion member 27 is fixed in the operating position. Failure and inconvenience can be prevented.

  In the first aspect of the present invention, if the adapter 24 is removed from the outer cylinder during the key difference conversion work, the same inconvenience occurs as when the conversion member 27 returns to the standby position.

  Therefore, in the third embodiment, when the operation end is pushed and the conversion member 27 is placed in the operating position, the latch lever does not expand and therefore the adapter 24 does not come off the outer cylinder. The invention will be described.

  In the variable lever tumbler lock according to the third aspect of the present invention, the flange portion 27 is smaller than the outer diameter of the operation end (see FIG. 9) on the inner side of the operation end 27a of the conversion member, that is, on the left side in FIG. Are connected.

  When the operation end 27a of the conversion member is not pushed after the adapter 24 is attached to the outer cylinder 16, the conversion member 27 is an adapter that is not numbered by the flange 27c due to the elasticity of the return spring 28 (see FIG. 7). It is seated at a position where it can be joined to the back plate.

  On the other hand, in the invention described in claim 3, the position of the latch lever 23 (see FIG. 7) in the outer cylinder axis direction is set so as to be aligned with the flange portion 27c joined to the back plate. .

  Therefore, the operation end of the latch lever 23, that is, the upper end of the latch lever in FIG. 7 faces the narrow portion of the flange portion 27c, so that the tips of the latch levers 23 and 23 can be expanded. Can be freely attached to and detached from the outer cylinder 16.

  On the other hand, when the operation end of the conversion member is pushed, the position of the flange portion 27c in the outer cylinder axis direction shifts from the position of the latch lever 23, as is apparent from FIGS. It comes to oppose the large diameter part of the operation end 27a of a conversion member.

  In this case, when the latch lever is to be expanded, its operating end is stopped by the operating end 27a of the conversion member, and the latch levers 23, 23 are not expanded, so that the adapter 24 cannot be removed from the outer cylinder 16.

In the illustrated embodiment, the large-diameter flange portion of the support shaft is a spacer ring that is separate from the support shaft, and this is fitted to the inner end of the support shaft. It goes without saying that, when taking out or plastic working, it may be cut out or formed integrally with the support shaft.
By the way, the spacer ring 15 is turned by turning or a commercially available serpentine shape (ring-through type), that is, a ring-shaped washer having a relatively large width in the radial direction of the substantial part is fitted on the support shaft. By using a large-diameter collar, the structure of the support shaft can be simplified or the manufacturing cost can be reduced.

The expanded cross-sectional view which shows an example of the support mechanism of the conventional variable lever tumbler lock. It is an expansion external appearance perspective view which shows the drive mechanism of the spindle by a switch member, and shows a normal state. FIG. 3 is an enlarged external perspective view showing a driving mechanism of a support shaft by a switch member similar to FIG. 2, showing a state in which the switch member is driven by a conversion pin. The partial cross section side view of the conventional variable lever tumbler lock. The partial cross section side view of the variable lever tumbler lock by one Example of this invention. The expanded partial secondary sectional view which shows the principal part of this invention. The expanded partial cross section which shows the principal part of this invention. FIG. 2 is an enlarged cross-sectional view of a variable lever tumbler lock similar to FIG. 1 showing the main part of the present invention, showing a state in which the conversion protrusion is inserted into the outer cylinder and the previous key is once inserted and removed. The expansion rear view of the conversion member seen from the operation end side.

Explanation of symbols

1 Lever Tumbler 1A Tumbler A
1B Tumbler B
DESCRIPTION OF SYMBOLS 2 Support shaft 3 Eccentric shaft 4 Escape hole 5 Joint key 6 Keyway 7 Engagement part 8 Unlocking notch 9 Engagement protrusion 11 Engagement recessed part 12 Locking bar 13 Conversion pin 14 Switch member 15 Large diameter collar part 16 Outer cylinder 19 Work Hole 20 Plug assembly 22 Recessed portion 23 Latch lever 24 Adapter 25 Rotating shaft 27 Conversion member 27a Operation end 27b Inclined surface 27c Flange portion 27d Locking groove 28 Return spring 29 Control plate 31 Insertion hole 32 Engagement protrusion 33 Support shaft spring 34 Locking hole 35 Retaining plate 37 Biasing spring

Claims (5)

  Each lever tumbler of the lever tumbler lock is a combination of a tumbler A and a tumbler B, which overlap each other in a substantially C shape, and a support shaft whose central axis is urged outward is The tumbler A, which is supported so as to be able to rotate around the axis of the eccentric shaft projecting from both ends, and is loosely fitted to the support shaft at one end via a vertically long escape hole, has an engaging portion with the key groove of the key. Forming and urging this in a direction that interferes with the key, and receiving a locking bar at the time of unlocking on the outer edge of the free end of the tumbler B with one end pivotably fitted to the support shaft A part that allows the inner cylinder to rotate or accepts a locking bar during key-to-key conversion to form a unlocking notch that allows the tumbler B to descend, and overlaps with the engaging part of the tumbler A with the key-side edge Is molded so as not to interfere with the key, A first engagement protrusion is formed on the inner edge of the free end of the tumbler A on the side facing the tumbler B, and a first engagement of the tumbler A is formed on the inner edge of the tumbler B on an arc centering on the support shaft. A plurality of engaging recesses that can be engaged with the protrusions are formed, and the angled positions of the engaging recesses are formed in a plurality of types of key grooves formed on the side edge of the key lock. Are set so as to be aligned with the first engaging protrusions when engaged with each other, a large-diameter collar is formed at the inner end of the support shaft, and the outer diameter is aligned with the large-diameter collar in the axial direction. A work hole that penetrates the outer cylinder in the radial direction of the outer cylinder is formed on the outer peripheral surface of the cylinder, and recessed portions are formed on both outer surfaces of the outer cylinder in the vicinity of the work hole, respectively, while straddling the outer cylinder. An adapter with a semicircular cross section is provided so that it can be joined to the On the side, the latch is supported so that the central portion can be pivoted on a pivot shaft that is parallel to the central axis of the outer cylinder when straddling the outer cylinder, and the tip is biased in a direction to engage with the recessed portion. On the other hand, a switch member that is mounted symmetrically on the lever, is guided by the adapter so as to be movable in the radial direction of the outer cylinder, and the inner end is inserted into the work hole so as to be able to contact the large-diameter flange of the support shaft. Provided outside the switch member, extends in the axial direction of the outer cylinder, is guided to be movable in the length direction, has a short cylindrical operation end at the base end, and is engaged with the switch member at the center. In addition, a conversion member formed with an inclined surface that pushes it inward by wedge action is provided, and when changing the key, the adapter is detachably attached to the outer cylinder via the latch lever, and the operation end of the conversion member is Push to move the switch member inward, and the inner end of the large diameter collar of the support shaft A variable lever tumbler lock that is pushed to separate the first engaging protrusion of the tumbler A and the engaging recess of the tumbler B. Each lever tumbler of the lever tumbler lock is a combination of a tumbler A and a tumbler B that are superposed on each other in a substantially C shape, and a support shaft whose central axis is urged outward is the axis around eccentric shaft projecting from the both ends supported to allow rotation, the engaging portion of the key groove of the master key in a tumbler a obtained by fitting Yu the support shaft through the elongated relief hole at one end The locking bar is received at the outer edge of the free end of the tumbler B, one end of which is pivotably fitted to the support shaft. To allow rotation of the inner cylinder or to accept a locking bar at the time of key change conversion to form an unlocking notch that allows the tumbler B to descend, and to overlap with the engaging portion of the tumbler A with the side key side Mold the part so as not to interfere with the key, A first engagement protrusion is formed on the inner edge of the free end of the tumbler A on the side facing the tumbler B, and a first engagement of the tumbler A is formed on the inner edge of the tumbler B on an arc centering on the support shaft. A plurality of engaging recesses that can be engaged with the protrusions are formed, and the angled positions of the engaging recesses are formed in a plurality of types of key grooves formed on the side edge of the key lock. Are set so as to be aligned with the first engaging protrusions when engaged with each other, a large-diameter collar is formed at the inner end of the support shaft, and the outer diameter is aligned with the large-diameter collar in the axial direction. A work hole that penetrates the outer cylinder in the radial direction of the outer cylinder is formed on the outer peripheral surface of the cylinder, and recessed portions are formed on both outer surfaces of the outer cylinder in the vicinity of the work hole, respectively, while straddling the outer cylinder. An adapter with a semicircular cross section is provided so that it can be joined to the On the side, the latch is supported so that the central portion can be pivoted on a pivot shaft that is parallel to the central axis of the outer cylinder when straddling the outer cylinder, and the tip is biased in a direction to engage with the recessed portion. On the other hand, a switch member that is mounted symmetrically on the lever, is guided by the adapter so as to be movable in the radial direction of the outer cylinder, and the inner end is inserted into the work hole so as to be able to contact the large-diameter flange of the support shaft. Provided outside the switch member, extends in the axial direction of the outer cylinder, is guided to be movable in the length direction, has a short cylindrical operation end at the base end, and is engaged with the switch member at the center. In addition, a conversion member formed with an inclined surface that pushes it inward by wedge action is provided, and when changing the key, the adapter is detachably attached to the outer cylinder via the latch lever, and the operation end of the conversion member is Push to move the switch member inward, and the inner end of the large diameter collar of the support shaft The first engagement protrusion of the tumbler A and the engagement recess of the tumbler B are separated by pushing, and loosely fitted to the support shaft in the vicinity of the large-diameter flange portion of the support shaft in the inner cylinder. When the insertion hole is opened and the second engagement protrusion is protruded at the lower edge, the wedge action caused by the engagement between the inclined edge of the key lock tip and the second engagement protrusion when the key is inserted into the key hole A control plate that is pushed outward is provided so as to be movable in the direction of movement of the switch member, and a locking hole that loosely fits the tip of the conversion member is opened at the outer end in the vicinity of the switch member in the adapter. The retaining plate is provided so that it can be moved in the radial direction of the outer cylinder with the inner edge joined to the outer edge of the control plate. When changing the key, the old key and the new key are inserted into the key hole. When not working, engage the locking hole of the retaining plate with the locking groove of the conversion member. Variable lever tumbler lock, characterized in that also release the hands to allow locking the switch member in the operative position. Each lever tumbler of the lever tumbler lock is a combination of a tumbler A and a tumbler B that are superposed on each other in a substantially C shape, and a support shaft whose central axis is urged outward is the axis around eccentric shaft projecting from the both ends supported to allow rotation, the engaging portion of the key groove of the master key in a tumbler a obtained by fitting Yu the support shaft through the elongated relief hole at one end The locking bar is received at the outer edge of the free end of the tumbler B, one end of which is pivotably fitted to the support shaft. To allow rotation of the inner cylinder or to accept a locking bar at the time of key change conversion to form an unlocking notch that allows the tumbler B to descend, and to overlap with the engaging portion of the tumbler A with the side key side Mold the part so as not to interfere with the key, A first engagement protrusion is formed on the inner edge of the free end of the tumbler A on the side facing the tumbler B, and a first engagement of the tumbler A is formed on the inner edge of the tumbler B on an arc centering on the support shaft. A plurality of engaging recesses that can be engaged with the protrusions are formed, and the angled positions of the engaging recesses are formed in a plurality of types of key grooves formed on the side edge of the key lock. Are set so as to be aligned with the first engaging protrusions when engaged with each other, a large-diameter collar is formed at the inner end of the support shaft, and the outer diameter is aligned with the large-diameter collar in the axial direction. A work hole that penetrates the outer cylinder in the radial direction of the outer cylinder is formed on the outer peripheral surface of the cylinder, and recessed portions are formed on both outer surfaces of the outer cylinder in the vicinity of the work hole, respectively, while straddling the outer cylinder. An adapter with a semicircular cross section is provided so that it can be joined to the On the side, the latch is supported so that the central portion can be pivoted on a pivot shaft that is parallel to the central axis of the outer cylinder when straddling the outer cylinder, and the tip is biased in a direction to engage with the recessed portion. On the other hand, a switch member that is mounted symmetrically on the lever, is guided by the adapter so as to be movable in the radial direction of the outer cylinder, and the inner end is inserted into the work hole so as to be able to contact the large-diameter flange of the support shaft. Provided outside the switch member, extends in the axial direction of the outer cylinder, is guided to be movable in the length direction, has a short cylindrical operation end at the base end, and is engaged with the switch member at the center. In addition, a conversion member formed with an inclined surface that pushes it inward by wedge action is provided, and when changing the key, the adapter is detachably attached to the outer cylinder via the latch lever, and the operation end of the conversion member is Push to move the switch member inward, and the inner end of the large diameter collar of the support shaft The first engagement protrusion of the tumbler A and the engagement recess of the tumbler B are separated by pushing, and the width dimension is larger than the outer diameter of the operation end inside the columnar operation end of the conversion member. A small flange portion is connected continuously, and the position of the operation end of the latch lever in the normal state is set to the same position as the flange portion, and the operation end is set close to the side edge of the flange portion. At the time of key difference conversion, after attaching the adapter to the cylinder barrel and moving the conversion member, the relative position of the operation end of the latch lever with respect to the conversion member is moved to the large diameter portion of the operation end, and the latch lever A variable lever tumbler lock, wherein the operation end is pushed inward so that the engagement between the tip of the latch lever and the recessed portion of the outer cylinder cannot be released.   The variable lever tumbler lock according to any one of claims 1 to 3, wherein the large-diameter flange portion of the support shaft is a serpentine-shaped spacer ring fitted to the inner end portion of the support shaft.   The variable lever tumbler lock according to any one of claims 1 to 3, wherein the large-diameter flange portion of the support shaft is formed integrally with the support shaft.

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