JP4465208B2 - 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 engagement protrusion 9 is formed on the side of the tumbler A1A facing the tumbler B1B at the inner edge of the free end, and the tumbler A is engaged on the inner edge of the tumbler B1B on an arc centered on the support shaft 2. A plurality of engaging recesses 11 that can be engaged with the protrusions 9 are respectively formed, and the formation angular positions of the engaging recesses 11 are tumbled in a plurality of types of key grooves 6 formed at side edges of the key 5. When the engaging portions of A are respectively engaged, 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 engaging projection 9 of the tumbler A1A is separated from the engaging recess 11. It 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 present invention is such that 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 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 at the inner edge of B, respectively, When the engaging portions of the tumbler A are engaged with the key grooves of a plurality of types of depths formed on the side edges, the lock body is set so as to be aligned with the engaging protrusions, and the external force is similar to that of the washing pin. In a normal state where the working end does not act, the working end is biased in the closing direction, and the operating end is operated with a finger in the direction in which the working end is widened, and protrudes toward the other inside at least one of the working ends. In the one having a conversion clip protruding from the conversion projection, a large-diameter collar is formed at the inner end of the support shaft of the lock body, and this is arranged on the outer peripheral surface of the outer cylinder aligned with the large-diameter collar in the axial direction. Through the outer cylinder in the radial direction, forming a work hole through which the conversion projection can be inserted When changing the key difference, insert the conversion protrusion into the work hole, sandwich the outer cylinder base of the lock body with the working end of the conversion clip, and push the large-diameter collar of the support shaft inward with the conversion protrusion The engagement protrusion of the tumbler A and the engagement recess of the tumbler B are separated from each other.

  Since the variable lever tumbler lock according to the present invention configured as described above does not require a switch member that is slidably guided to the outer cylinder to drive the support shaft, the bulging portion is formed on the outer cylinder. And a simple cylinder.

  Therefore, the structure of the variable lever tumbler lock can be made simple and compact, and the operation at the time of key difference conversion can be performed reliably.

  Furthermore, since the engagement protrusion of the tumbler A and the engagement recess of the tumbler B can be separated and re-engaged simply by picking and releasing the operation end of the conversion clip, In comparison, the efficiency of the key-difference conversion work is improved at various stages, and various effects are exhibited.

  Instead of the conventional switch member that slides in the radial direction of the outer cylinder, the support shaft is directly driven by the conversion projection of the conversion clip that inserts the work hole into the base of the outer cylinder, so that it bulges into the outer cylinder of the variable lever tumbler lock This eliminates the need to form a part and makes the key difference conversion work extremely easy.

Embodiments of the present invention will be described below with reference to FIGS.
5 to 7, reference numeral 16 denotes an outer cylinder of the variable lever tumbler lock, and the outer cylinder 16 penetrates the outer cylinder 16 at a base end portion of the outer cylinder 16 at an angle position of 12 o'clock in FIG. A working hole 21 is formed. In FIG. 7, the working holes are not numbered for the sake of clarity.

  The position of the working hole 21 in the outer cylinder axis direction is a position that aligns with the spacer ring 15 (see FIGS. 2 and 3) fitted to the proximal end of the support shaft 2.

  In the illustrated embodiment, the shape of the opening in the outer peripheral surface of the outer cylinder 16 of the working hole 21 is an outer shape through which the conversion protrusion 27 can be inserted according to the cross-sectional shape of the conversion protrusion 27 (see FIG. 6) described later. It is a long and narrow rectangle.

  On the other hand, in FIG. 6, reference numeral 22 denotes a conversion clip. The conversion clip 22 has an overall shape like a washing pin, and its action end (see FIGS. 8 (the left end) is biased in the closing direction.

  The conversion clip 22 has, for example, a part of protrusions inside the central portions of the first and second members 24 and 25 that have a generally toroidal shape as a whole and stole the inner meat leaving a non-numbered rib. The first and second members 24 and 25 are connected together so that they can be rotated together by a rotation shaft (not shown) that is butted in a superposed manner and inserted through this overlapping portion, and is configured like a known laundry pin Has been.

  Further, as shown in FIG. 7, the inner side of the working end of the conversion clip 22 is formed in a circular arc shape so that it can be joined to the outer peripheral surface of the outer cylinder 16 of the variable lever tumbler lock.

  Furthermore, as shown in FIGS. 7 and 8, a bottomed recess having a rectangular projection shape on the paper surface and a rectangular shape (see FIG. 6) in cross section is formed on the inner side of the distal end portion of the first and second members. 26 is formed.

  Then, in one of the recesses 26, 26 (in the illustrated embodiment, the recess 26 of the first member 24), a conversion projection member 27 whose side edge is formed in a sawtooth shape to prevent slipping is mounted by, for example, press-fitting. Has been.

  The lower end portion of the conversion projection member 27 is formed into a semicircular shape, for example, to form a conversion projection, and the downward projection amount of the conversion projection 27 is, as shown in FIGS. When the conversion protrusion 27 is inserted into the outer cylinder through the working hole 21, the conversion protrusion pushes the spacer ring 19 downward as shown in FIG. 5, and the tumbler A1A and the tumbler B1B are mutually connected. It is set to be disconnected.

  As shown in FIG. 1, the variable lever tumbler lock according to an embodiment of the present invention constructed as described above is inserted into the key hole 6 when the key is changed, and the unlocking notch of the tumbler BIB is inserted. 8 and the inner edge of the locking bar 12 are aligned.

  Next, as shown in FIGS. 5 and 7, the base end portion of the outer cylinder 16 is sandwiched between the distal end portions of the conversion clips 22, and the conversion protrusions 27 are inserted into the outer cylinder from the working holes 21 of the outer cylinder.

Then, the conversion protrusion 27 inserted through the work hole 21 pushes the outer peripheral edge of the spacer ring 15 which is the large-diameter flange portion of the support shaft downward against the elasticity of the support shaft spring 28 (see FIG. 4).
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.

  Therefore, the support shaft 2 slightly rotates clockwise around the eccentric shaft 3 (see FIGS. 2 and 3) in FIG. 5, and the tumbler BIB moves downward as the support shaft 2 rotates. Then, the engagement between the engagement protrusion 9 and the engagement recess 11 is released.

  In this case, since the tip of the conversion clip is closed by the elasticity of the clip spring 23, the state shown in FIG.

  Next, when a new key is inserted, the tumbler A1A is rotated to an angular position corresponding to the keyway of the new key. In this state, the operation end (right end in FIGS. 6 to 8) of the conversion clip 22 is grasped with fingers. When the operation end is expanded as shown in FIG. 8, the conversion projection 27 is removed from the working hole 21 of the outer cylinder.

  Then, the tumbler B1B is lifted by the elastic force of the support shaft spring 28, and any of the engaging recesses 11 engages with the engaging protrusion 9 at the new angular position, and thus the tumbler A1A and the tumbler B1B are renewed. The relative angular position is determined.

  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.

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. 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 top view which shows the state which pinched | interposed the base end of the variable lever tumbler lock by the action end of the conversion clip at the time of key difference conversion. In the longitudinal cross-sectional view of a conversion clip, the state which pinched | interposed the outer cylinder between the action ends is shown. In the longitudinal cross-sectional view of a conversion clip, the operation end is pinched and the action end is expanded.

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 Key groove 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 21 Work Hole 22 Conversion clip 23 Clip spring 27 Conversion projection 28 Spindle spring

Claims (3)

Each lever tumbler of the lever tumbler lock is a combination of a tumbler A and a tumbler B that overlap each other in a substantially C shape, and a support shaft that is urged so that the central axis is directed outwards, 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 with one end pivotally 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, Engagement protrusions on the inner edge of the tumbler A on the side facing the tumbler B, and engagement edges on the inner edge of the tumbler B on the arc centered on the support shaft 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. A lock body set to be aligned with the engaging projection, a washing pin-like working end biased in a closing direction in a normal state where no external force is applied, and a direction in which the working end is expanded In the one having an operation end operated by a finger and a conversion clip having a conversion projection protruding toward the other inside at least one of the action ends, the inner diameter of the support shaft of the lock body has a large diameter. Form a collar and align with this large diameter collar in the axial direction A working hole that penetrates the outer cylinder in the radial direction of the outer cylinder and through which the conversion protrusion can be inserted is formed on the outer peripheral surface of the outer cylinder. The outer cylinder base of the lock body is sandwiched between the ends, and the large-diameter collar portion of the support shaft is pushed inward by the conversion projection, so that the engagement projection of the tumbler A and the engagement recess of the tumbler B are separated. Variable lever tumbler tablet characterized by   2. The variable lever tumbler lock according to claim 1, wherein the large-diameter flange portion of the support shaft is a snake-like spacer ring fitted to the inner end portion of the support shaft.   The variable lever tumbler lock according to claim 1, wherein the large-diameter flange portion of the support shaft is formed integrally with the support shaft.

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