JP6029028B2 - Convertible cylinder lock - Google Patents

Description

  The present invention relates to a conversion type cylinder lock capable of converting a key code, and in particular, a key code conversion type conversion formula capable of setting many variations of the key code and reducing the axial length of the outer cylinder. It relates to a cylinder lock.

  As a cylinder lock capable of converting a key code, the following Patent Document 1 proposes a key code conversion type cylinder lock in which a tumbler is provided in a number of partition grooves arranged in parallel inside an inner cylinder. In this cylinder lock, an inner cylinder is rotatably inserted into an outer cylinder, and a large number of partition grooves for inserting a tumbler are arranged in parallel to the shaft in the inner cylinder. A specially shaped tumbler having a gear portion is inserted. Further, a pinion and a swing plate are disposed so as to be engageable with a large number of tumblers, and by changing their engagement positions, the unlocking position of the tumbler is changed, and the key code is changed.

  In addition, a swing gear is disposed on the cylinder lock so as to be able to mesh with a gear portion of a tumbler, and a side bar extending in the axial direction is engaged with and mounted on an outer peripheral position of the pinion so as to be movable in the radial direction. When converting the key code of this cylinder lock, when the conversion key is inserted into the key hole of the inner cylinder and the inner cylinder is rotated, the side bar moves and the pinion moves, so that the pinion and the tumbler are engaged. When the conversion key is removed and the conversion key is pulled out, the key code is reset. After that, a new normal key is inserted into the key hole, and the inner cylinder is configured to mesh with the pinion and the tumbler gear at a new position of the tumbler, so that a new key code is set. .

JP 2008-297696 A

  However, the above-described conventional key code conversion type cylinder lock needs to incorporate a complicated structure such as a pinion, swing gear and the like so that it can be engaged with the inner cylinder in addition to many specially shaped tumblers. The structure of the lock has become very complex, and the outer cylinder of the cylinder lock has also increased in size.

  Further, in this type of tumbler-type cylinder lock, the number of variations of the unlock key code, that is, the number of variations of the normal key and the converted normal key is determined based on the number of tumblers. For this reason, when this type of convertible cylinder lock is manufactured and sold as a general-purpose cylinder lock and is considered to be used by many users, many variations of unlocking key codes are set for the convertible cylinder lock. Accordingly, the number of tumblers arranged in the axial direction in the inner cylinder is inevitably increased.

  However, when the number of tumblers is increased, the axial length of the conversion cylinder lock becomes longer than that of a normal cylinder lock, and the conversion cylinder lock is used as an existing cylinder lock. As a locking device for the door of the equipment, the conventional general-purpose cylinder lock cannot be used as it is.

  For example, the cylinder lock used as a locking device for doors of vending machines that are currently manufactured and sold in a wide range is determined by the standard that the axial length (depth) of the outer cylinder is 17.4 mm. Yes. For this reason, when using a conversion type cylinder lock as a locking device of the door of a vending machine, it is necessary to make the axial length of the outer cylinder into 17.4 mm.

  However, considering variations of the unlocking key code of the conversion cylinder lock that can be actually provided to the user, at least 12 to 13 tumblers arranged in the axial direction in the inner cylinder are required, and parts processing, etc. In view of the ease and manufacturing cost, it is very difficult to make the length of the outer cylinder of the above-described conversion cylinder lock the length determined by the standard. For this reason, there has been a demand for a key code conversion type cylinder lock having the same outer diameter and axial length as those of currently used cylinder locks.

  The present invention has been made in view of the above points, and is a key code conversion type in which a large number of key code variations can be set, and the axial length can be shortened with a relatively simple structure. It aims at providing a conversion type cylinder lock.

In order to achieve the above object, the conversion type cylinder lock of the present invention comprises:
A conversion cylinder that converts a key code of a cylinder lock opened and closed by a normal key into a key code for the new normal key using a conversion key corresponding to the normal key and a new conversion key corresponding to the new normal key. In the lock,
Forming an outer shell of the lock, and an outer cylinder in which axial grooves are formed at predetermined angular intervals on the inner wall surface;
It is rotatably inserted into the outer cylinder, and a key insertion hole is provided in the axial direction, and a plurality of pin tumbler insertion pin holes communicate with the key insertion hole in two rows in a direction perpendicular to the key insertion hole. An inner cylinder provided,
A plurality of pin tumblers that are slidably inserted into the pin holes of the two rows and are urged inward by a pin spring and have ring-shaped teeth on the outer peripheral portion, and are arranged in two rows ,
The disc is inserted into side bar recesses on both sides of the outer periphery of the inner cylinder, and a disc insertion groove for inserting a disk tumbler is provided. When the inner cylinder rotates, it can move radially in the side bar recess. A first sidebar disposed on
A disc tooth portion slidably inserted into the disc insertion groove of the first side bar and meshing with the tooth portion of the pin tumbler; and corresponding to the two rows of the pin tumblers, the inner cylinder A plurality of disc tumblers disposed on both sides of the
The fitting recess provided in the outer surface portion of the first side bar is fitted into the inner cylinder so as to be movable in the radial direction, and has an inner ridge that can be engaged with an opening groove provided in the disc tumbler, A second side bar having an outer ridge that can be fitted with a groove provided on the inner surface of the outer cylinder;
A first spring that urges the first side bar to the outside of the inner cylinder;
A second spring that biases the second side bar toward the outside of the inner cylinder with respect to the first side bar;
The normal key and the new normal key are provided in the inner cylinder and engaged with the normal key and the new normal key in a state where the normal key and the new normal key are inserted into the key insertion hole and rotated. Retaining pin that prevents the key from being removed,
With
The conversion key and the new conversion key are formed so that they can be removed while being inserted into the key insertion hole and turned.
At the time of key code conversion, when the conversion key is inserted into the key insertion hole and the inner cylinder is turned by a predetermined angle, the first side bar moves to the outside of the inner cylinder together with the disk tumbler, and the disk tumbler After the disc tooth portion and the tooth portion of the pin tumbler are disengaged and the conversion key is pulled out from the key insertion hole, the new conversion key having a corrugated portion corresponding to the new normal key is inserted into the key insertion hole. When inserted, the pin tumbler slides in the axial direction at a position corresponding to the key code of the new conversion key. In this state, the new conversion key is turned to return the inner cylinder to the original position. One side bar moves to the inside of the inner cylinder together with the disc tumbler, the disc tooth portion of the disc tumbler meshes with the tooth portion of the pin tumbler, and the key code is converted.

  According to the conversion type cylinder lock of this invention, a plurality of pin tumblers are inserted into the pin holes provided in two rows in the inner cylinder, and the first side is provided in the side bar recesses provided on both sides of the outer peripheral part of the inner cylinder. A bar is inserted, and the first side bar is provided with a disk insertion groove for inserting a disk tumbler. When the inner cylinder is rotated, the first side bar is disposed so as to be movable in the side bar recess in the radial direction. The disc tumbler is slidably inserted into the disc insertion groove of the first side bar, and is inserted into the disc insertion groove formed in a direction perpendicular to the shaft in communication with each pin hole of the inner cylinder. Is arranged on both sides of the inner cylinder corresponding to the two rows of pin tumblers, and the disc tumbler is provided with disc teeth that mesh with the teeth of the pin tumbler. And disc tumbler increase the number of unlocked key code variations, and with a relatively simple structure, the key code can be converted, the outer cylinder shape can be reduced, and the axial direction Can be shortened.

  Here, in the conversion type cylinder lock, each disk tumbler is provided with an opening groove, and an inner ridge is provided inside the second side bar so as to be able to engage with the opening groove. Is preferably configured so as to be provided with a protrusion that engages with an engaging portion provided in the disk insertion groove of the first side bar. According to this, at the time of conversion of the key code, the protrusion is engaged with the engaging portion in the disc insertion groove of the first side bar to disengage the disc tooth portion of the disc tumbler and the tooth portion of the pin tumbler. When the key is inserted into and removed from the key insertion hole of the inner cylinder, the engagement between the opening groove of the disk tumbler and the inner protrusion of the second side bar is disengaged, and the disk tooth portion of the disk tumbler The pin tumbler can be slid in a state where the tooth portions of the pin tumbler are engaged, and the key can be easily inserted and removed.

  In addition, here, the plurality of pin tumblers arranged in the two rows are arranged so as to be alternately shifted so as to form a staggered pattern in a plan view, and the normal key and the conversion key have a central groove in the center. A corrugated portion that is formed in the axial direction and that engages with each of the two rows of pin tumblers may be formed on both sides of the central groove. According to this, at the time of manufacturing the inner cylinder, the required length of the inner cylinder is ensured by sufficiently securing the thickness of the pin hole of the inner cylinder and the wall of the pin hole while shortening the axial length of the inner cylinder as much as possible. Can be secured.

  In addition, here, the concave groove is formed at an angular interval of 90 ° on the inner side surface of the outer cylinder, and when the conversion key is inserted and turned 90 °, the outer ridge of the second sidebar is engaged. A notch recess is provided in a form in which a part of the recessed groove at the mating position is expanded, and outer notches provided on both outer side portions of the first side bar can be engaged with the notch recess. A configuration is preferable. According to this, when the key code is converted, the first side bar and the second side bar are engaged due to the engagement between the outer convex portion and the notched concave portion when the conversion key is inserted and the inner cylinder is turned 90 ° by the simple structure. Is moved to the outside of the inner cylinder together with the disk tumbler, and the disk tooth portion of the disk tumbler is removed from the tooth portion of the pin tumbler to perform the conversion operation.

  Here, the biasing force of the first spring is set larger than the biasing force of the second spring, and when the conversion key is turned 90 ° during key code conversion, the biasing force of the first spring causes the first side spring to bias the first side. With the bar holding the second side bar in the fitting position, the outer convex portion of the first side bar engages with the notched concave portion and moves outward, and the tooth portion of the pin tumbler and the disc tooth It is possible to configure so that the key code can be converted by disengagement from the unit.

  Also, here, a back cam plate is attached to the back side of the inner cylinder, and when the inner cylinder is turned 90 ° during unlocking operation or key code conversion operation, the rear cam plate is attached to the outer cylinder. The rotation angle position of 90 ° can be set in contact with the part.

  Also, here, at the back of the key insertion hole of the inner cylinder, a retaining pin for retaining the key is inserted at a right angle to the axial direction, and the retaining pin is in contact with the convex portion of the normal key, The normal key can be prevented from being pulled out at the unlocked position, and the conversion key can be configured such that the convex portion is cut out so that the conversion key can be removed during the key code conversion operation. . According to this, with a simple configuration, the conversion key can be removed from the key insertion hole during the conversion at the time of key code conversion, and the normal key can be prevented from being lost during the unlocking operation.

  Here, in the conversion cylinder lock, the depth of the pin hole formed in the inner cylinder is preferably formed slightly deeper than the lowest cord position of the pin tumbler. According to this, at the time of key code conversion, after inserting the conversion key and turning it to a predetermined position, when a new conversion key corresponding to the new normal key is inserted into the key insertion hole instead of the conversion key, the new conversion key If the tip of the wire does not reach the tip of the key insertion hole and the insertion becomes insufficient, the position of the pin tumbler 3 reaches slightly deeper than the lowermost cord.

  For this reason, the crests of the pin tumbler teeth engage with the crests of the disc tumbler disc teeth so that the outer ridges of the second sidebar do not come out of the grooves in the outer cylinder, and the rotation of the inner cylinder is prevented. The new conversion key and the inner cylinder cannot be returned to their original positions, and an incorrect setting of the key code can be prevented. In addition, since it is possible to prevent erroneous setting during key code conversion only by machining such a simple pin hole, there is no need for a separate confirmation pin or the like as in the prior art, and the inner and outer cylinders can be easily reduced in size. Can be

  Also, here, in the conversion type cylinder lock, the key insertion hole is formed at the front of the flange provided at the front of the inner cylinder so that the front of the flange can be rotated inside the front of the outer cylinder. The step recess to be inserted is provided in a circular shape, and an arc-shaped fitting recess for inserting an arc-shaped key position plate is provided in a part of the step recess, and the normal insertion portion inserted into the key insertion hole An arcuate key position plate that prevents the key or the conversion key from being pulled out in the middle position and determines the insertion / removal angle position is fitted into the fitting recess, and the key position plate is provided with a groove, The base part of the normal key or the conversion key is provided with a key relief groove, and the angular position of the concave groove of the key position plate is determined when the normal key or the conversion key is inserted into and removed from the key insertion hole. Is aligned with the groove It may be configured to connect or disconnect the angular position of the is set as determined.

  According to this, when a normal key or conversion key is inserted into the key insertion hole and rotated, the key is inevitably inserted into an appropriate position (a position where the key relief groove and the recessed groove of the key are aligned). And the key insertion / removal angle position is precisely limited to a predetermined angle position, preventing the pin tumbler and disc tumbler from becoming defective due to the normal key or conversion key being inserted / removed at an intermediate position other than the predetermined angle. can do.

  Further, unlike the conventional cylinder lock, there is no need to provide a groove for restricting the insertion / removal position of the key in the front part (flange-shaped front part) of the outer cylinder, and the large flange-shaped part provided in the outer cylinder. Since the front portion can be eliminated, the axial length of the cylinder lock can be shortened and the size can be reduced.

  Furthermore, in the conventional conversion type cylinder lock, in order to prevent erroneous conversion and setting during key code conversion, a confirmation pin for insertion confirmation is arranged at the end of the inner cylinder, and the confirmation pin is a new conversion. There is a structure that allows the inner cylinder to return and rotate when pressed by proper insertion of the key, but the conversion cylinder lock of the present invention eliminates the need for a confirmation pin by the above configuration. Thereby, while shortening the outer diameter and length of the inner cylinder and the outer cylinder, the number of pin tumblers and disk tumblers can be ensured to a predetermined number, and variations of unlocking key codes can be increased.

  Further, here, in the conversion type cylinder lock, a circumferential groove is provided inside the front flange portion of the inner cylinder, and the key position plate can be slidably fitted into the circumferential groove. According to this, when assembling the conversion type cylinder lock, the key position plate is simply inserted into the outer cylinder while the key position plate is fitted in the circumferential groove of the inner cylinder, and the key position plate can be easily attached to the outer cylinder. It can be made to fit in the fitting recessed part in a front part, and an assembly | attachment operation | work can be performed easily.

  According to the conversion type cylinder lock of the present invention, the axial lengths of the outer cylinder and the inner cylinder can be shortened with a relatively simple structure while increasing the number of variations of the unlocking key code.

It is a perspective view of the conversion type cylinder lock which shows one Embodiment of this invention. It is a perspective view of an internal mechanism except an outer cylinder and an inner cylinder of the conversion type cylinder lock. It is the perspective view seen from another angle of the internal mechanism except the outer cylinder and inner cylinder of the same conversion type cylinder lock. It is a left view of the same conversion type cylinder lock. It is a disassembled perspective view of the same conversion type cylinder lock. It is a disassembled perspective view except the outer cylinder of the conversion type cylinder lock. It is a partial fragmentary sectional view except an outer cylinder, a spring, and a retaining pin. (A) is a front view of an outer cylinder, (b) is a right side view of the outer cylinder, and (c) is a rear view of the outer cylinder. (A) is a plan view of the inner cylinder, (b) is a bottom view of the inner cylinder, (c) is a front view of the inner cylinder, and (d) is a rear view of the inner cylinder. (A) (b) is a perspective view of an outer cylinder. It is a disassembled perspective view of an inner cylinder, a pin tumbler, and a disk tumbler. It is a disassembled perspective view of an inner cylinder and a pin tumbler. (A) (b) is a perspective view of a 1st sidebar. (A) is a front view of the first sidebar, (b) is a plan view thereof, and (c) is a rear view thereof. It is a disassembled perspective view of a 1st sidebar and a 2nd sidebar. (A) and (b) are perspective views of a 2nd sidebar. (A) is the front view of a 2nd sidebar, (b) is the top view, (c) is the back view. (A) is a front view of the disc tumbler, (b) a plan view thereof, and (c) a left side view thereof. (A) is a front view of a pin tumbler, (b) is the top view. (A) is a front view of a normal key, (b) is a left side view thereof, (c) is a plan view thereof, and (d) is a right side view thereof. (A) (b) is a perspective view of a normal key. (A) is a perspective view of a conversion key, (b) is the right view. (A) is II sectional drawing of FIG. 4, (b) It is the II-II sectional drawing. (A) is sectional drawing at the time of locking, (b) is sectional explanatory drawing of the state which inserted and unlocked the normal key normally. (A) (b) is sectional explanatory drawing which shows the state in which the normal key can be inserted / removed in the locked state. It is sectional explanatory drawing of the state which inserted the conversion key, rotated 90 degrees right, and then pulled out the conversion key. It is sectional explanatory drawing at the time of inserting a new conversion key and returning to an original position. It is sectional explanatory drawing when insertion becomes inadequate at the time of insertion of a new conversion key. The outer cylinder of other embodiment is shown, The front view (a) of the state which attached the key position plate, the longitudinal cross-sectional view (b), The front view (c) of the state which removed the key position plate. It is the front view (a) of the key position plate, and the side view (b). It is the front view (a) of the inner cylinder of other embodiment, its right view (b), and its left view (c). It is sectional explanatory drawing at the time of inserting an inner cylinder assembly in an outer cylinder. It is sectional drawing of the state which inserted the inner cylinder assembly in the outer cylinder. It is explanatory drawing (a) which shows the relationship between the normal key (new conversion key) of another embodiment, and a conversion type cylinder lock, and sectional explanatory drawing (b) of the state which inserted the key.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. This conversion-type cylinder lock is a cylinder lock that can convert an unlocking key code. As shown in FIGS. 1 to 7, an inner cylinder 2 is rotatably disposed in a relatively short outer cylinder 1. In the inner cylinder 2, a pin tumbler 3 is disposed at a right angle to the inner cylinder axis, and a plurality of disc tumblers 4 and a second disk tumbler 4 are disposed in side bar recesses 23 provided on both sides of the inner cylinder 2. A first side bar 5 containing two side bars is slidably disposed. In addition, as shown in the perspective view of FIG. 3, the arrow F is the front of the lock, the arrow R is the rear of the lock, the arrow U is the upper, the arrow D is the lower, Arrow RI is on the right side and arrow L is on the left side.

  This conversion type cylinder lock generally forms an outer shell of the lock, and an outer cylinder 1 in which axial concave grooves 11 are formed at an angle interval of a predetermined angle (here, approximately 90 °) on the inner wall surface; A key insertion hole 20 is axially provided in the outer cylinder 1 and 10 pin tumbler insertion holes 21 in a direction perpendicular to the key insertion hole 20 communicate with the key insertion hole 20. Inner cylinders 2 provided in two rows, and slidably inserted into each pin hole 21, provided with annular tooth portions 31 on the outer peripheral portion, and ten pin tumblers 3 arranged in two rows. .

  Further, the conversion type cylinder lock is disposed on the outer peripheral portion of the inner cylinder 2 so as to be slidable in the radial direction and has a disc insertion groove 51 into which a part of each disc tumbler 4 is inserted. Each disk tumbler 4 is moved at the time of conversion, and a first side bar 5 for changing the meshing position of the tooth portion 31 of the pin tumbler 3 and the disk tooth portion 41, and a fitting recess 54 provided on the outer surface portion of the first side bar 5 An inner ridge 62 that fits into the groove provided in the fitting recess 54 is provided on the inner surface, and an outer ridge 61 that can be fitted to the groove 11 of the outer cylinder 1 is provided on the outer surface. 2 side bars 6.

  As shown in FIGS. 5 and 6, a plurality of pin tumblers 3 are accommodated in two rows in the inner cylinder 2, but on both sides of the two rows of pin tumblers 3, there are a plurality of disk insertion grooves 22 inside. The disk tumbler 4 is formed in a direction perpendicular to the shaft in communication with the pin hole 21, and the disk tumbler 4 is slidably inserted into the disk insertion groove 51 of the first side bar 5 in each disk insertion groove 22. , Housed. Each disc tumbler 4 is provided with a disc tooth portion 41 that meshes with the tooth portion 31 of the pin tumbler 3, and the first side bars 5 on both sides are arranged outside the inner cylinder 2 so as to be disengaged during key code conversion. Move to.

  As shown in FIGS. 7 and 8, the outer cylinder 1 is formed in a cylindrical shape having a flange portion at the front, and the grooves 11 are formed in the inner wall surface of the outer cylinder 1 in the axial direction at an angular interval of approximately 90 °. Four are formed. In these four concave grooves 11, as described later, the second side fitted in the first side bar 5 on both sides of the inner cylinder 2 (position corresponding to 0 o'clock and position corresponding to 6 o'clock in FIG. 24). The outer ridge 61 of the bar 6 can be fitted when the inner cylinder 2 is rotated by 90 °. The cross-sectional shape of the groove 11 is a substantially triangular chevron shape, and the outer ridge 61 of the second side bar 6 formed in the same chevron shape fits into the groove 11, thereby The second side bar 6 is locked, and the inner cylinder 2 is locked to the outer cylinder 1.

  Further, as shown in FIGS. 24 to 27, notches are formed on both ends of the concave groove 11 provided at positions corresponding to 0 o'clock and 6 o'clock on the inner surface of the outer cylinder 1 in such a manner that the groove is expanded on both sides to expand the groove. A recess 12 is formed. The notch recess 12 is a recess provided for key code conversion. When the key code is converted, the outer protrusions 53 at both ends of the first side bar 5 are fitted into the notch recess 12 so that the first side The bar 5 moves outward, thereby disengaging the disc tooth portion 41 and the tooth portion 31 and converting the key code.

  As shown in FIG. 6 and the like, side bar recesses 23 are provided on both side portions of the inner cylinder 2 (positions corresponding to 0 o'clock and 6 o'clock in FIGS. 24 to 27), and the first side bar 6 is held first. The side bars 5 are slidably fitted in the side bar recesses 23 on both sides within a predetermined range. As described above, the concave grooves 11 are provided at 90 ° angular intervals at positions corresponding to 0 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock on the inner wall surface of the outer cylinder 1 (Figs. 24 to 27). The concave portions 12 are provided so as to expand the concave grooves only at both end portions of the concave grooves 11 at positions corresponding to 0 o'clock and 6 o'clock in FIGS.

  At the time of key code conversion, the first side bar 5 moves outward so that the outer convex portion 53 is fitted into the notched concave portion 12 of both side wall portions while holding the second side bar 6. As a result, the disc tumbler 4 held by the first side bar 5 moves to the outside of the inner cylinder 2, the disc tooth portion 41 and the tooth portion 31 of the pin tumbler 3 are disengaged, and key code conversion is possible. It becomes a state.

  On the other hand, as shown in FIG. 5, a back cam plate 17 is fitted to the inner cylinder shaft portion 25 that protrudes toward the back side of the inner cylinder 2. The back cam plate 17 abuts a part of the outer cylinder 1 when the inner cylinder 2 is turned 90 ° to the right at the time of unlocking operation or key code conversion, and sets the rotational angle position of the inner cylinder 2.

  In this embodiment, the structure is such that unlocking or key code conversion is performed when the inner cylinder 2 is turned 90 ° to the right. However, the unlocking or key code conversion is performed by turning the inner cylinder 90 ° to the left. The rear cam plate 17 may be reversed and fitted to the inner cylinder shaft portion 25. For this reason, in the case of a conversion type cylinder lock that unlocks or converts the key code by turning the key counterclockwise, it can be easily manufactured by reversing and attaching the rear cam plate 17.

  As shown in FIGS. 7 and 9, the inner cylinder 2 is formed with a key insertion hole 20 in the axial direction at a position offset downward from the axial center position, and a plurality of disk insertion grooves perpendicular to the axis. 22 is formed in the inner cylinder 2 at a predetermined interval. Further, a plurality of pin holes 21 for pin tumbler insertion are formed in the inner cylinder 2 in two rows in a direction perpendicular to the key insertion holes 20 so as to communicate with the key insertion holes 20.

  For example, ten pin holes 21 are formed in two rows so that ten pin tumblers 3 in total are inserted. Further, as shown in FIG. 9, the two rows of pin holes 21 are formed in a staggered pattern so as to be shifted from each other in plan view. Thereby, the space | interval of a pin hole can be ensured thickly, the intensity | strength of the inner cylinder 2 can be made high irrespective of use of many pin tumblers 3, and the number of pin tumblers 3 can be increased. The number of key code variations can be set more. Furthermore, by arranging the pin tumblers 3 in two rows, the outer diameter and the axial length of the outer cylinder 1 and the inner cylinder 2 can be reduced as compared with the case where the pin tumblers 3 are arranged in one row. The length of the inner cylinder 2 and the outer cylinder 1 in the axial direction can be shortened so that the general-purpose cylinder lock has the same external shape as the standardized general-purpose cylinder lock.

  These two rows of ten pin holes 21 are formed with the above-described disc insertion grooves 22 communicating from the outside, and the respective disc tumblers 4 held by the first side bar 5 enter the disc insertion grooves 22. At the same time, the disk tooth portion 41 enters the pin hole 21 and meshes with the tooth portion 31 of each pin tumbler 3. Further, as shown in FIG. 28 and the like, the depths of these pin holes 21 are formed slightly (about 0.5 mm) deeper than the position where the pin tumbler 3 reaches the lowest cord position. As a result, when the key conversion is performed, when the new conversion key 90a corresponding to the new normal key is inserted into the key insertion hole 20 with the conversion key 70a removed, the pin tumbler is not fully inserted. The crest of the third tooth portion 31 and the crest of the disc tooth portion 41 of the disc tumbler 4 are engaged, and the first side bar 5 and the second side bar 6 are moved outward and cannot be removed. As a result, the outer ridge 61 is fitted into the groove 11 of the outer cylinder 1 to prevent the inner cylinder 2 from rotating, thereby preventing erroneous conversion and erroneous setting during key code conversion.

  In conventional conversion cylinder locks, in order to prevent erroneous conversion and incorrect setting during key code conversion as described above, a confirmation pin for confirming insertion is provided at the end of the inner cylinder. However, when it is pushed by proper insertion of a new conversion key, the inner cylinder can be rotated back. However, the conversion type cylinder lock of the present invention has a structure that prevents the rotation of the inner cylinder 2 when the new conversion key 90a corresponding to the new normal key is not inserted to the proper position at the time of conversion. A pin becomes unnecessary, and thereby the outer diameter and length of the inner cylinder 2 and the outer cylinder 1 can be shortened.

  On the other hand, in order to prevent the normal key from being pulled out with the normal key 70 inserted and rotated 90 ° to the right, a retaining pin 19 is provided. For this purpose, a small-diameter retaining pin hole 24 is formed adjacent to the pin hole 21 at the rear part (the innermost part) of the inner cylinder 2. The retaining pin 19 is inserted into the retaining pin hole 24 as shown in FIG. The tip of the pin reaches the key insertion hole 20. When the normal key 70 is inserted into the key insertion hole 20 and the inner cylinder 2 is rotated, the tip of the retaining pin 19 engages with a wave recess 74 (FIG. 20) provided at the tip of the normal key 70. Normally, unnecessary removal of the key 70 is prevented.

  As shown in FIG. 6, the retaining pin 19 is held at a fixed position in the retaining pin hole 24 by attaching a pin support plate 18 to the outer peripheral portion of the inner cylinder 2. Above all the pin tumblers 3 inserted into the pin holes 21, pin springs (coil springs) 7 are inserted so as to push the respective pins, and the pin spring 7 attaches the pin support plate 18 to the inner cylinder 2. It is pushed into the hole by fixing. Accordingly, each pin tumbler 3 is always urged inwardly in the pin hole 21 and disposed. Further, as shown in FIG. 5, an inner cylinder shaft portion 25 protrudes from the rear portion (back surface portion) of the inner cylinder 2, and the hole of the rear cam plate 17 is fitted by closing the rear portion of the outer cylinder 1. The inner cylinder shaft part 25 protrudes from.

  Further, as shown in FIG. 5 to FIG. 7, sidebar recesses 23 are formed along the axial direction on both the left and right sides of the inner cylinder 2, and the first sidebar 5 is disposed in the sidebar recesses 23. 2 is slidably inserted only in the radial direction. As will be described later, the second side bar 6 is fitted into the first side bar 5 so as to be slidable only in the radial direction of the inner cylinder 2 in a fitting recess 54 provided on the outer side thereof. A disc tumbler 4 is slidably inserted in a plurality of disc insertion grooves 22 provided on the inner side of the disc 5.

  As shown in FIGS. 20 and 21, a wave recess 74 is formed inside the wave projection 75 at the tip of the waveform portion 72 of the normal key 70, and the tip of the retaining pin 19 engages with this wave recess 74. Normally, unnecessary removal of the key 70 is prevented. Note that, in the conversion key 70a having a corrugated portion corresponding to the normal key 70, as shown in FIG. 22, the wave-shaped convex portion at the tip is cut off to form a flat portion 76, whereby the tip of the retaining pin 19 is removed. Therefore, the conversion key 70a can be pulled out with the conversion key 70a inserted and the inner cylinder 2 turned when the key code is converted.

  As shown in FIGS. 20 to 22, the normal key 70 and the conversion key 70 a have two rows of waveform portions 72, 73, 82, corresponding to the two rows of pin tumblers 3 arranged in the inner cylinder 2. 83 is formed along the longitudinal direction, and a central groove 71 is formed between the corrugated portion 72 and the corrugated portion 73 along the longitudinal direction. In the key insertion hole 20 of the inner cylinder 2, a ridge 26 (FIGS. 7 and 9) having a rectangular cross section is formed in the axial direction corresponding to the central groove 71 of the normal key 70 and the conversion key 70a.

  When the normal key 70 and the conversion key 70a are inserted, the normal key 70 and the central groove 71 of the conversion key 70a are fitted into the ridge 26 in the central groove 71 to guide the key insertion operation, and the normal key 70 and the conversion key 70a are converted. The two rows of corrugated portions 72 and 73 of the key 70a are in exact contact with the tip positions of the pin tumblers 3. Further, when the normal key 70 and the conversion key 70a are inserted to a predetermined position in the key insertion hole 20 of the inner cylinder 2, the tips of the pin tumblers 3 accurately contact the concave grooves of the two rows of corrugated portions 72 and 73. Thus, each pin hole 21 in the inner cylinder 2 is formed in the radial direction.

  In this embodiment, the number of the groove portions of the tooth portion 31 of the pin tumbler 3 is four, and the engagement patterns of the two disk tooth portions 41 with respect to the four groove portions are three types, the upper and lower centers, Corresponding to these three types of engagement patterns, the grooves of the two rows of corrugated portions 72 and 73 of the normal key 70 and the conversion key 70a are manufactured at the three types of depths.

  As shown in FIG. 18, the disc tumbler 4 is configured in a plate shape by forming, for example, two disc teeth 41 on the inner side (left side in the drawing) and forming an opening groove 43 on the outer side (right side in the drawing). One ridge 42 is projected in the vertical direction on the front side. When the disc tumbler 4 is inserted into the disc insertion groove 51 of the first side bar 5 by the projection 42, the projection 42 is engaged with the engaging portion 52 in the groove, and the disc tumbler 4 is engaged with the first side bar. The disc 5 is held in the disc insertion groove 51 of the bar 5 so as to be slidable up and down.

  The two disk tooth portions 41 can mesh with the tooth portions 31 (four groove portions of the tooth portions) of the pin tumbler 3, and the opening groove 43 has an inward protrusion on the inner side of the second sidebar 6 as shown in FIG. The strip 62 can be fitted. When the inner ridge 62 of the second side bar 6 is fitted into the opening groove 43 of the disc tumbler 4, the second side bar 6 is returned to the inside, and is unlocked.

  Each disc tumbler 4 is inserted into each disc insertion groove 51 of the first side bar 5 so as to be slidable in the vertical direction. At this time, the protrusion 42 of the disc tumbler 4 is inserted into the disc insertion groove 51 of the first side bar 5. The engaging portion 52 is engaged. As a result, the disc tumbler 4 can be moved in the radial direction in the inner cylinder 2 together with the first side bar 5 while being slidably inserted into the disc insertion grooves 51 of the first side bar 5. It is.

  As shown in FIG. 19, the pin tumbler 3 is formed in a cylindrical shape with a hemispherical tip, and a tooth portion 31 having, for example, four ring-shaped grooves and four peaks is formed on the outer periphery thereof. It is formed with a pitch. As shown in FIG. 23, the two disk teeth 41 of the disk tumbler 4 mesh with the grooves of these teeth 31, and the key code changes according to the meshing position.

  That is, there are three patterns in which the two disk tooth portions 41 of the disk tumbler 4 are engaged with the four groove portions of the tooth portion 31 of the pin tumbler 3, and there are three patterns for the upper and lower centers, and three patterns for one pin tumbler 3. Since ten pin tumblers 3 are arranged, the cylinder lock of this embodiment can set the number of key codes of 3 to the 10th power. With such a set number of key codes, a sufficient number of unlock key code variations can be made even in cylinder locks that are actually manufactured and sold. Further, at the time of key code conversion, the two disk teeth 41 of the ten disk tumblers 4 and the teeth of the ten pin tumblers 3 according to the shape of the waveform part of the new conversion key 90a corresponding to the new normal key. The key code is converted by changing the meshing position of the part 31 with the four grooves.

  In this embodiment, the number of groove portions of the tooth portion 31 of the pin tumbler 3 is four, the number of the disk tooth portions 41 of the disc tumbler 4 is two, and the meshing pattern is three patterns. The number of the groove parts of the tooth part 31, the number of the disk tooth parts 41 of the disk tumbler 4, and the number of meshing patterns can be arbitrarily set.

  As shown in FIGS. 6, 7, 13, and 14, the first side bar 5 is formed in a substantially bowl shape that can be fitted into the side bar recesses 23 on both sides of the inner cylinder 2. For example, five disk insertion grooves 51 are formed in the transverse direction at predetermined intervals in order to insert, for example, five disk tumblers 4. An engaging portion 52 is formed on one side of the opening edge of each disk insertion groove 51 so as to protrude. The protrusions 42 of the disc tumbler 4 engage with the engaging portion 52 so as to be slidable up and down.

  Outer convex portions 53 are projected from both side end portions of the outer side portion of the first side bar 5. The outer convex portions 53 at both side end portions are provided for key code conversion, and are formed into shapes that can be fitted into the notch concave portions 12 provided at the 0 o'clock position and the 6 o'clock position inside the outer cylinder 1. As shown in FIG. 24, the notch recess 12 is provided so as to extend from the vicinity of both end portions of the concave groove 11 provided at a position corresponding to 0 o'clock and 6 o'clock inside the outer cylinder 1 and is converted at the time of key code conversion. When the key is inserted and the inner cylinder 2 is turned 90 ° to the right, the outer convex portion 53 of the first side bar 5 is fitted into the notched concave portion 12 on both side wall portions, thereby the disc tumbler together with the first side bar 5 4 is moved to the outside of the inner cylinder 2 to disengage the disc tooth portion 41 from the tooth portion 31 of the pin tumbler 3.

  Furthermore, as shown in FIGS. 13 to 15, the second side bar 6 is fitted between the outer convex portion 53 and the outer convex portion 53 on the outer side of the first side bar 5, that is, both end portions. A concavity 54 is formed. Further, as shown in FIG. 7, a thin concave groove 54a is formed in the inner bottom portion of the fitting concave portion 54, and the inner convex strip 62 of the second side bar 6 can be fitted into the concave groove 54a. Further, as shown in FIG. 13, two pairs of spring holes 55 are formed at both end portions of the inner side surface of the first side bar 5. As shown in FIGS. 5 and 6, four first springs 8 are inserted into these spring holes 55, and a relatively large spring force (biasing force) is applied to the inner cylinder 2, so that the second The first side bar 5 is urged to the outside of the inner cylinder 2 with the side bar 6 held. The first sidebar 5 is slidably mounted by being urged outward by the four first springs 8, and the spring force of the first sidebar 5 by the four first springs 8 is two. The spring force of the second side bar 6 by the second spring 9 is set larger. As a result, the spring member of the first spring 8 and the second spring 9 can be used as a common component, and the spring force of the first spring 8 is set to be larger than the spring force of the second spring 9 so that the key code can be converted. It is done properly.

  As shown in FIGS. 16 and 17, the second side bar 6 is formed in a square bar shape having a rectangular cross section that can be fitted into the fitting recess 54 of the first side bar 5. When wide portions are provided on both sides of the second side bar 6, the inner ridge 62 is formed between the wide portions on both sides, and the second side bar 6 is inserted into the fitting recess 54 of the first side bar 5. The inner ridge 62 can be fitted into the groove 54 a (FIG. 7) in the fitting recess 54 of the first side bar 5.

  As shown in FIG. 7, to the position where the inner protrusion 62 of the second side bar 6 is fitted in the groove 54 a of the fitting recess 54 of the first side bar 5, that is, to the innermost part of the fitting recess 54. When the second side bar 6 is fitted, the outer side surface of the outer ridge 61 of the second side bar 6 is formed to be substantially in the same position as the outer side surface of the outer convex portion 53 of the first side bar 5. . Further, a pair of spring holes 63 are formed in the inner side surfaces of the wide portions on both sides of the second side bar 6, and the second springs 9 (two coil springs) are inserted into these spring holes 63. The two second springs 9 exert a spring force smaller than the four first springs 8 between the first sidebar 5 and the second sidebar 6 outside the first sidebar 5 (inner cylinder). (Outside of 2).

  A cutout recess 12 is formed on the inner side surface of the outer cylinder 1 in such a manner that part of both end portions of the groove 11 corresponding to the 0 o'clock and 6 o'clock positions are expanded for key code conversion. As described above, the spring force of the first spring 8 of the first side bar 5 is set to be larger than the spring force of the second spring 9 of the second side bar 6, so that the second side bar 6 is changed during key code conversion. Is held in place, the first side bar 5 is slid outward, the outer convex portion 53 is fitted into the notch concave portion 12, and the tooth portion 31 of the pin tumbler 3 and the disk tooth portion 41 are Disengagement enables key code conversion.

  That is, as shown in FIG. 26, when the inner cylinder 2 is rotated 90 ° by the conversion key 70a at the time of key code conversion, the first side bar 5 has its outer convex portion 53 by the urging force of the first spring 8. When the second spring 9 having a small urging force is compressed and the second side bar 6 is held at a fixed position in the first side bar 5 when moving into the notch recess 12 and moving outward, It is a moving structure.

  In this embodiment, four coil springs are used as the first spring 8, and two coil springs are used as the second spring 9, so that the biasing force of the first spring 8 is applied to the second spring. It is set larger than the power. Thereby, although there exists a merit which can use a coil spring as a common component in a 1st spring and a 2nd spring, a spring of various shapes and arbitrary numbers of springs are used for a 1st spring and a 2nd spring. You can also.

  When assembling the conversion type cylinder lock having the above-described configuration, as shown in FIGS. 5 to 7, first, the pin tumbler 3 is inserted into each pin hole 21 of the inner cylinder 2, and the retaining pin is inserted into the retaining pin hole 24. In the state where the pin spring 7 is inserted on the pin tumbler 3, the pin support plate 18 is put on and fixed by caulking or the like.

  Next, the disc tumbler 4 is inserted into each disc insertion groove 51 of the first side bar 5, and the first spring (four coil springs) 8 is interposed between the first side bar 5 and the side bar recess 23 of the inner cylinder 2. The first side bar 5 is fitted into the side bar recess 23 in a state where is attached. The first side bar 5 is fitted into the side bar recesses 23 on both sides of the inner cylinder 2, and in this state, the inner part of each disk tumbler 4 inserted into each disk insertion groove 51 is located on the inner cylinder 2 side. The disk enters the disk insertion groove 22.

  Next, in a state where the assembling flat key is inserted into the key insertion hole 20, the second side bar 6 is inserted into the fitting recesses 54 of the first side bar 5 on both sides, and the second spring 9 (two coils). Insert with spring interposed. Then, when the second sidebar 6 is pushed inward while slightly lifting each disk tumbler 4 in the disk insertion groove 22 of the inner cylinder 2 using a jig, the inner ridge 62 of the second sidebar 6 is pushed. Is fitted into the opening groove 43 of each disk tumbler 4, and the disk tooth portion 41 of each disk tumbler 4 is engaged with the tooth portion 31 of the pin tumbler 3, resulting in an assembled state as shown in FIG. Then, the assembled inner cylinder assembly is placed in a predetermined position in the outer cylinder 1, that is, as shown in FIG. 23, so that the outer ridge 61 of the second side bar 6 is located inside the groove 11 in the outer cylinder 1. The cylinder assembly is inserted into the outer cylinder 1, the rear cam plate 17 is fitted into the inner cylinder shaft portion 25 on the rear side of the inner cylinder 2, and fixed by caulking or the like to complete the assembly.

  Thus, according to the conversion type cylinder lock having the above-described configuration, the pin tumblers 3 are inserted into the pin holes 21 provided in two rows in the inner cylinder 2, and the disc tumbler 4 is inserted into the disc of the first side bar 5. It is inserted into the groove 51 and is slidably inserted into the disk insertion groove 51 formed in a direction perpendicular to the shaft so as to communicate with each pin hole 21 of the inner cylinder 2 and two rows of pin tumblers 3. The disk tumbler 4 is provided on both sides of the inner cylinder 2, and the disk tumbler 4 is provided with a disk tooth portion 41 that meshes with the tooth portion 31 of the pin tumbler 3, so that the two rows of the pin tumbler 3 and the disk tumbler 4 By combining, the outer diameter of the outer cylinder 1 can be reduced, the axial length thereof can be shortened, and the number of unlocked key code variations that can be converted into a key code is set large. It can be.

  Next, the operation of the conversion cylinder lock having the above configuration will be described. In the normal locking state in which the normal key (joint key) 70 is not inserted, as shown in FIG. 24 (a), the outer protrusion of the second side bar 6 fitted to the outside of the first side bar 5 in the inner cylinder 2 is provided. The strip 61 engages with the concave groove 11 inside the outer cylinder 1, whereby the inner cylinder 2 is prevented from rotating and the locked state is maintained.

  In the locked state, as shown in FIG. 24 (a), the first side bar 5 and the second side bar 6 are at the 3 o'clock position and the 9 o'clock position, and there is no notch in the groove 11 position on the inner surface of the outer cylinder 1. Therefore, the outer convex portion 53 of the first side bar 5 abuts on both side edges of the concave groove 11 and cannot move outward. For this reason, only the second side bar 6 moves outward by the urging force of the second spring 9, the outer ridge 61 of the second side bar 5 fits into the groove 11, and the inward protrusion of the second side bar 6. The strip 62 is disengaged from the opening groove 43 of the disc tumbler 4.

  Further, the tooth portion 31 of the pin tumbler 3 and the disk tooth portion 41 of the disk tumbler 4 are in mesh with each other, and the outer protrusion 61 of the second side bar 6 is engaged with the groove 11 inside the outer cylinder 1. Therefore, when a normal key is inserted, each pin tumbler 3 can move together with the disc tumbler 4 in accordance with the waveform portion of the key.

  That is, since the notch recess 12 is not provided on the inner surface of the outer cylinder 1 at the 3 o'clock position and the 6 o'clock position, the outer projection 53 of the first side bar 5 cannot be fitted into the notch recess 12 and the first side bar 5 cannot move outward. For this reason, only the second side bar 6 moves outward in a state where the disk tooth portion 41 of each disk tumbler 4 is engaged with the tooth portion 31 of the pin tumbler 3, and the outer ridge 61 of the second side bar 6 is moved. The inner protrusion 62 is engaged with the concave groove 11 on the inner side of the outer cylinder 1, and the inner convex strip 62 is disengaged outward from the opening groove 43 of the disc tumbler 4.

  For this reason, the disc tumbler 4 can slide in the axial direction of the pin together with the pin tumbler 3, and when the normal key 70 or the conversion key 70a is inserted into the key insertion hole 20, the disc tumbler 4 shown in FIGS. Thus, the pin tumbler 3 slides with the disk tumbler 4 in accordance with the groove of the key, and the key can be inserted and removed.

  When the normal key (joint key) 70 is inserted into the key insertion hole 20, each pin tumbler 3 moves together with the disc tumbler 4 according to the waveform portion of the key, and the opening grooves 43 of all the disc tumblers 4 are formed in the second sidebar 6. When the position of the inner ridge 62 coincides, the second side bar 6 can move inward so that the inner ridge 62 enters the opening groove 43. For this reason, the cylinder lock is in an unlockable state, and as shown in FIG. 24B, if the inserted normal key is turned, for example, 90 ° to the right, the second side bar 6 causes the inner ridge 62 to open the opening groove 43. So that the outer ridge 61 is removed from the groove 11, and a rotation operation associated with unlocking can be performed.

  Thus, as shown in FIGS. 25 (a) and 25 (b), each pin tumbler 3 moves in the axial direction together with the disk tumbler 4 in accordance with the insertion / removal of the normal key 70 into / from the key insertion hole 20. Further, as shown in FIG. 24B, when the normal key 70 is inserted into the key insertion hole 20, the opening grooves 43 of all the disk tumblers 4 and the inner ridges 62 of the second side bar 6 are formed. Since the positions coincide with each other, the second side bar 6 can be moved inward so that the inner ridge 62 enters the opening groove 43. In this state, the key is turned to turn the inner cylinder 2 clockwise, The lock can be operated.

  When the normal key 70 is changed to another new normal key, the following key code conversion operation is performed.

  First, the conversion key 70 a described above is inserted into the key insertion hole 20. At this time, the shape of the corrugated portion of the key of the conversion key 70a is the same as that of the normal key 70 except for the tip portion. 62 moves so that the positions match. For this reason, when the inner cylinder 2 is turned by operating the conversion key 70a, the second side bar 6 moves inward, and the outer ridge 61 is disengaged inward from the groove 11 of the outer cylinder 1, and the inner cylinder 2 is For example, it is rotated 90 ° to the right, and the upper stage of FIG. 26 is obtained.

  At this time, the first side bar 5 and the second side bar 6 on both sides in the inner cylinder 2 reach the 0 o'clock position and 6 o'clock position in the figure, and the concave grooves 11 at the 0 o'clock position and 6 o'clock position on the inner surface of the outer cylinder 1 are obtained. Since there are notch recesses 12 at both end portions, the outer convex portions 53 at both end portions of the first side bar 5 reach this position. Therefore, the first side bar 5 is moved outward by the urging force of the first spring 8, and the outer convex portions 53 on both sides of the first side bar 5 are fitted into the notch concave portions 12 in the outer cylinder 1, so that the disk tumbler 4 disc teeth 41 are disengaged from the teeth 31 of the pin tumbler 3. At this time, since the urging force of the second spring 9 of the second side bar 6 is smaller than that of the first spring 8, the urging force of the first spring 8 overcomes and the first side bar 5 moves outward. Then, the second side bar 6 is moved outward in a state where the second side bar 6 is held at a predetermined position, and the state shown in the middle part of FIG.

  In this way, when the conversion key 70a is inserted and turned 90 ° to the right, the first side bar 5 is moved to the outside of the inner cylinder 2 together with the disc tumbler 4 and the second side bar 6 as shown in the middle stage of FIG. The disc tooth portion 41 of the disc tumbler 4 is disengaged from the tooth portion 31 of the pin tumbler 3, and the key code can be converted.

  Then, with the inner cylinder 2 rotated 90 ° in this way, the conversion key 70a is pulled out as shown in the lower part of FIG. At this time, the wave convex portion at the tip of the conversion key 70a is cut off to form a flat portion 76, and all the pin tumblers 3 can be moved up and down, so that the conversion key 70a can be pulled out.

  Next, instead of the conversion key 70a, a new conversion key 90a corresponding to a new normal key having a waveform portion with a different key code is inserted into the key insertion hole 20. At this time, as shown in FIG. 27, all the pin tumblers 3 slide in the axial direction in accordance with the shape of the waveform portion provided in the new conversion key 90a. Even in this state, the inner ridge 62 of the second side bar 6 is fitted in the opening grooves 43 of all the disk tumblers 4.

  Next, as shown in the lower part of FIG. 27, the new conversion key 90a is turned counterclockwise to return the inner cylinder 2 to the original angular position. At this time, the first side bar 5, together with the second side bar 6 and the disc tumbler 4, resists the biasing force of the first spring 8 by the load that the outer convex portion 53 receives from the inner surface of the outer cylinder 1, and moves inward. As a result, the disc tooth portion 41 of the disc tumbler 4 meshes with the tooth portion 31 of the pin tumbler 3 and returns to the upper position in FIG. 25, and the key code is converted. As a result, all pin tumblers 3 are slid in accordance with the waveform portion (the same waveform portion as the new normal key) provided in the new conversion key 90a, and the unlock position is set. It is converted to the key code of the normal key.

  When the new conversion key 90a is inserted into the key insertion hole 20, the insertion of the key is insufficient, the tip of the new conversion key 90a does not reach the most advanced code position of the key insertion hole 20, and the new conversion key 90a It is assumed that the pin tumbler 3 does not reach the appropriate position corresponding to the corrugated portion in the pin hole 21.

  In such a case, since the key code conversion cannot be performed accurately, the pin hole 21 of the inner cylinder 2 is located at the lowermost code position of the pin tumbler 3 as shown in FIG. It is drilled slightly deep (for example, about 0.5 mm).

  Therefore, when the new conversion key 90a is inserted into the key insertion hole 20, the tip of the new conversion key 90a does not reach the most advanced code position of the key insertion hole 20, and the insertion becomes insufficient. The position of the pin tumbler 3 biased by the pin spring 7 is positioned slightly behind the lowermost cord position.

  For this reason, as shown in FIG. 28, the crest of the tooth portion 31 of the pin tumbler 3 and the crest of the disc tooth portion 41 of the disc tumbler 4 are engaged, and the outer ridge 61 of the second side bar 6 is recessed in the outer cylinder 1. The inner cylinder 2 is prevented from rotating because the inner cylinder 2 does not come off from the groove 11. Thereby, when the new conversion key 90a is inserted, if the new conversion key 90a does not reach the most advanced code position of the key insertion hole 20 and the insertion becomes insufficient, the reverse rotation cannot be performed. For this reason, erroneous setting of the key code in such a case can be prevented only by the simple processing of the pin hole 21.

  As described above, the above-described conversion type cylinder lock is a combination of two rows of pin tumblers 3 and disc tumblers 4, and the number of variations of unlocking key codes is increased, and the shape of the outer cylinder 1 is shortened and miniaturized. be able to.

  In the above embodiment, ten pin tumblers 3 arranged in two rows are arranged in the inner cylinder 2, but may be eight, twelve, nine, or eleven. Similarly, the number of disk tumblers 4 arranged on both sides in the inner cylinder 2 can be 8, 12, 9, or 11, corresponding to the number of pin tumblers 3. . In the above description, when the key code is converted, the conversion operation is performed by turning the conversion key 70a or the new conversion key 90a by 90 °. However, the conversion may be performed at 80 ° or 100 °.

  FIGS. 29-34 has shown the conversion type cylinder lock of other embodiment. In the conversion type cylinder lock of this embodiment, the key position plate 8 having a simple structure is attached to the outer cylinder 1A, so that the insertion / removal angle position of the normal key (conversion key) is limited to a predetermined two angle position, and the halfway angle of the key In addition to preventing insertion / removal at the position, it solves the problem of rotating the key with insufficient insertion of the key. In addition, the part of the same structure as the conversion type cylinder lock of the said embodiment attaches | subjects the same code | symbol as the above to drawing, and abbreviate | omits the description.

  29, as shown in FIG. 29, the stepped recess 13 is formed in a circular shape inside the front portion of the outer cylinder 1A that opens in a circular shape, and the flange front portion 27 of the inner cylinder 2A shown in FIG. Is inserted into the step recess 13 in a rotatable manner. Furthermore, a thin arc-shaped fitting recess 14 is provided in a part of the step recess 13, and the arc-shaped key position plate 8 shown in FIG. 30 is connected to the fitting recess 14 as shown in FIG. It has a structure that fits inside.

  The key position plate 8 restricts the insertion / removal position (angular position) of the normal key (or conversion key) 80 to a predetermined two-angle position, and prevents insertion / removal at the halfway angle position. Concave grooves 8a are formed at two locations inside. As shown in FIG. 30, the two recessed grooves 8 a are provided inside the key position plate 8 at an angular interval of 90 °. On the other hand, a key escape groove 80a is provided at the base of the normal key 80 or the conversion key as shown in FIG.

  As shown in FIG. 34, the two concave grooves 8a of the key position plate 8 are formed so as to coincide with the key relief groove 80a provided at the base of the normal key 80 (or conversion key) when the key is inserted or removed. The key can be inserted / removed only at an angular position where the key relief groove 80a provided at the base of the normal key 80 matches the concave groove 8a, and the insertion / removal at the midway angular position is prevented.

  As shown in FIG. 29, the key position plate 8 is fitted in and attached to an arcuate fitting recess 14, but in this state, the two recessed grooves 8a of the key position plate 8 are spaces in the outer cylinder 1A. The key position plate 8 is attached so that the inner edge of the key position plate 8 other than the concave groove 8a protrudes into the internal space. Thus, when the normal key 80 (or conversion key) is inserted into the key insertion hole 20 and rotated, the key rotates without being inserted to a predetermined position (a position where the key relief groove 80a and the concave groove 8a meet). In addition, the key cannot be removed at a position where the key relief groove 80a and the concave groove 8a do not coincide with each other.

  In addition, as shown in FIG. 29, in the state where the key position plate 8 is attached to the fitting recess 14 of the outer cylinder 1A, the two recessed grooves 8a of the key position plate 8 are spaced by 90 ° inside the outer cylinder 1A. The key position plate 8 is attached so as to coincide with the angular position of the concave groove 11 formed in (1). As described above, this is because the key insertion / removal position of the conversion cylinder lock is when the key insertion hole 20 of the inner cylinder 2A reaches the concave groove 11 in the outer cylinder 1A.

  Thus, the key insertion / removal position can be set only by attaching the thin metal plate key position plate 8 to the inside of the front portion of the outer cylinder 1A. The flange-shaped front part provided in the outer cylinder can be eliminated compared with the case where the part is projected in the form of a flange and a concave groove is provided on the inner side thereof, thereby reducing the axial length of the cylinder lock. Can be shortened.

  On the other hand, as shown in FIG. 31, a flange front portion 27 is provided at the front portion of the inner cylinder 2 </ b> A, and the key insertion hole 20 is formed in the flange front portion 27. Furthermore, a circumferential groove 28 is provided immediately inside the flange front portion 27. As shown in FIGS. 31 and 32, the key position plate 8 is fitted in the fitting recess 14 of the outer cylinder 1A while being slidably fitted in the circumferential groove 28.

  That is, the key position plate 8 is slidably inserted in the circumferential groove 28 in the circumferential direction, thereby rotating the inner cylinder 2A with respect to the key position plate 8 inserted into a predetermined position in the outer cylinder 1A. Operable. As shown in FIG. 34, the two concave grooves 8a of the key position plate 8 coincide with the positions of the key insertion holes 20 when the inner cylinder 2A is at the key insertion / removal angle positions θ1, θ2, and the key insertion It is exposed from the hole 20.

  When the inner cylinder 2A (inner cylinder assembly) is inserted and assembled into the outer cylinder 1A, the pin tumbler 3, the disk tumbler 4, the first side bar 5, and the second are previously attached to the inner cylinder 2A as described above. With the side bar 6 assembled at a predetermined position and the key position plate 8 slidably fitted into the circumferential groove 28 of the flange front portion 27, the inner cylinder assembly is inserted into the outer cylinder 1A. At this time, as shown in FIG. 32, the inner cylinder assembly is set so that the outer ridge 61 of the second side bar 6 is at the angular position of the groove 11, as shown in FIG. 23 described above. Then, the inner cylinder assembly is inserted into the outer cylinder 1A.

  Thus, as shown in FIG. 33, the flange front portion 27 of the inner cylinder 2A is rotatably fitted in the stepped recess 13 in the front portion of the outer cylinder 1A, and is inserted into the circumferential groove 28 of the flange front portion 27. The key position plate 8 is fitted into the fitting recess 14 of the outer cylinder 1A and attached at a fixed position. Then, as shown in FIG. 33, the rear cam plate 17 is fitted into the inner cylinder shaft portion 25 on the rear side of the inner cylinder 2A and fixed by caulking or the like, and the assembly of the conversion cylinder lock is completed.

  As described above, the inner cylinder 2A is provided in the outer cylinder 1A in a state in which the circumferential groove 28 is provided inside the flange front portion 27 of the inner cylinder 2A, and the key position plate 8 is slidably fitted in the circumferential groove 28. Since the inner cylinder 2A can be inserted into the outer cylinder 1A, the key position plate 8 can be easily fitted into the fitting recess 14 of the outer cylinder 1A by simply inserting the inner cylinder 2A into the outer cylinder 1A. Therefore, assembly work can be performed easily.

  In the conversion type cylinder lock having the above configuration, when a normal locking (unlocking) operation is performed, the normal key 80 is inserted into the key insertion hole 20 at the angular position θ1, as shown in FIG. Alternatively, when converting the key code, the conversion key is inserted into the key insertion hole 20 at the angular position θ1. At this time, the concave groove 8a of the key position plate 8 is at the angular position θ1, and the normal key 80 (conversion key) is inserted to the proper insertion position, and the key relief groove 80a engages with the concave groove 8a of the key and rotates. Therefore, even if an attempt is made to rotate the normal key 80 in an inappropriate insertion state, the rotation of the normal key 80 is prevented.

  In particular, as described above, when the width of the concave groove 11 of the outer cylinder 1 is increased, the range in which the key can be inserted / removed is widened, and when the key is removed from the appropriate angular position, If the strip 62 interferes with the disk tumbler 4 and tries to move the pin tumbler 3 in this state, the tooth portion 31 and the disk tooth portion 41 are likely to bite. However, with the above-described configuration, it is possible to prevent a pin tumbler or a disc tumbler from becoming defective due to a rotation operation of the normal key 80 (or the conversion key) in an inappropriate insertion state.

  In this way, the arcuate key position plate 8 that prevents the normal key 80 or the conversion key inserted into the key insertion hole 29 from being pulled out in the middle position and determines the insertion / removal angle position is fitted into the fitting recess 14. The key position plate 8 is provided with a concave groove 8a, and the normal key 80 or the base part of the conversion key is provided with a key relief groove 80a. The angular position of the concave groove 8a of the key position plate 8 is the normal key 80. Alternatively, when the conversion key is inserted / removed into / from the key insertion hole 20, the key relief groove 80a is set to coincide with the concave groove 8a so that the key insertion / removal angle position is determined. This prevents the pin tumbler and disc tumbler from being bitten and defective, etc., which are caused by turning in an improperly inserted state. Kill.

  Furthermore, with the above configuration, unlike the conventional cylinder lock, there is no need to provide a concave groove for restricting the insertion / removal position of the key in the front part (flange-shaped front part) of the outer cylinder. The large front can be eliminated. Thereby, the axial length of the cylinder lock can be shortened, and the size can be reduced.

  Furthermore, in the conventional conversion type cylinder lock, in order to prevent erroneous conversion and setting during key code conversion, a confirmation pin for insertion confirmation is arranged at the end of the inner cylinder, and the confirmation pin is a new conversion. There is a structure that allows the inner cylinder to return and rotate when it is pushed by proper insertion of the key, but the conversion cylinder lock with the above configuration does not require a confirmation pin. While shortening the outer diameter and length of the cylinder 2A and the outer cylinder 1A, the number of pin tumblers and disk tumblers can be secured to a predetermined number, and variations in unlocking key codes can be increased.

DESCRIPTION OF SYMBOLS 1 Outer cylinder 1A Outer cylinder 2 Inner cylinder 2A Inner cylinder 3 Pin tumbler 4 Disc tumbler 5 1st side bar 6 2nd side bar 8 Key position plate 8a Groove 11 Groove 12 Groove 13 Groove 13 Step recess 14 Back Cam plate 18 Pin support plate 19 Retaining pin 20 Key insertion hole 21 Pin hole 22 Disc insertion groove 23 Side bar recess 24 Retaining pin hole 25 Inner cylinder shaft portion 26 Projection 27 Flange front portion 28 Circumferential groove 31 Tooth portion 41 Disc tooth portion 42 Convex strip 43 Open groove 51 Disc insertion groove 52 Engagement portion 53 Outer convex portion 54 Fitting concave portion 54a Concave groove 55 Spring hole 61 Outer convex strip 62 Inner convex strip 63 Spring hole 70 Normal key 70a Conversion key 71 Central groove 72 Waveform part 73 Waveform part 74 Wave concave part 75 Wave convex part 76 Flat part 80 Normal key 80a Key relief groove 90a New Conversion key

Claims (10)

A conversion cylinder that converts a key code of a cylinder lock opened and closed by a normal key into a key code for the new normal key using a conversion key corresponding to the normal key and a new conversion key corresponding to the new normal key. In the lock,
Forming an outer shell of the lock, and an outer cylinder in which axial grooves are formed at predetermined angular intervals on the inner wall surface;
It is rotatably inserted into the outer cylinder, and a key insertion hole is provided in the axial direction, and a plurality of pin tumbler insertion pin holes communicate with the key insertion hole in two rows in a direction perpendicular to the key insertion hole. An inner cylinder provided,
A plurality of pin tumblers that are slidably inserted into the pin holes of the two rows and are urged inward by a pin spring and have ring-shaped teeth on the outer peripheral portion, and are arranged in two rows ,
The disc is inserted into side bar recesses on both sides of the outer periphery of the inner cylinder, and a disc insertion groove for inserting a disk tumbler is provided. When the inner cylinder rotates, it can move radially in the side bar recess. A first sidebar disposed on
A disc tooth portion slidably inserted into the disc insertion groove of the first side bar and meshing with the tooth portion of the pin tumbler; and corresponding to the two rows of the pin tumblers, the inner cylinder A plurality of disc tumblers disposed on both sides of the
The fitting recess provided in the outer surface portion of the first side bar is fitted into the inner cylinder so as to be movable in the radial direction, and has an inner ridge that can be engaged with an opening groove provided in the disc tumbler, A second side bar having an outer ridge that can be fitted with a groove provided on the inner surface of the outer cylinder;
A first spring that urges the first side bar to the outside of the inner cylinder;
A second spring that biases the second side bar toward the outside of the inner cylinder with respect to the first side bar;
The normal key and the new normal key are provided in the inner cylinder and engaged with the normal key and the new normal key in a state where the normal key and the new normal key are inserted into the key insertion hole and rotated. Retaining pin that prevents the key from being removed,
With
The conversion key and the new conversion key are formed so that they can be removed while being inserted into the key insertion hole and turned.
At the time of key code conversion, when the conversion key is inserted into the key insertion hole and the inner cylinder is turned by a predetermined angle, the first side bar moves to the outside of the inner cylinder together with the disk tumbler, and the disk tumbler After the disc tooth portion and the tooth portion of the pin tumbler are disengaged and the conversion key is pulled out from the key insertion hole, the new conversion key having a corrugated portion corresponding to the new normal key is inserted into the key insertion hole. When inserted, the pin tumbler slides in the axial direction at a position corresponding to the key code of the new conversion key. In this state, the new conversion key is turned to return the inner cylinder to the original position. A conversion type cylinder characterized in that one side bar moves together with the disk tumbler to the inside of the inner cylinder, the disk tooth portion of the disk tumbler meshes with the tooth portion of the pin tumbler, and the key code is converted. Tablets.
  Each disk tumbler is provided with an opening groove, and an inner ridge is provided inside the second side bar so as to be engageable with the opening groove. Each disk tumbler includes a disk of the first side bar. The conversion cylinder lock according to claim 1, further comprising a protrusion that engages with an engagement portion provided in the insertion groove. The plurality of pin tumblers arranged in the two rows are arranged so as to be alternately shifted so as to form a staggered shape in a plan view, and the normal key , the conversion key, the new normal key, and the new conversion key are arranged. 2. The conversion formula according to claim 1, wherein a central groove is formed in the center in the axial direction, and a corrugated portion engaging with each of the two rows of pin tumblers is formed on both sides of the central groove. Cylinder lock.
  The groove is formed on the inner surface of the outer cylinder at an angular interval of 90 °, and a notch recess is provided on the inner surface of the outer cylinder in a form in which a part of the groove is expanded. The convertible cylinder lock according to claim 1.   The biasing force of the first spring is set to be larger than the biasing force of the second spring. When the conversion key is turned 90 ° during key code conversion, the first side bar is moved by the biasing force of the first spring. With the two sidebars held in the mating position, the outer convex portion of the first sidebar enters the cutout concave portion, the first sidebar moves outward, and the pin tumbler teeth and the 5. The conversion type cylinder lock according to claim 4, wherein the engagement with the disc tooth portion is disengaged and the key code can be converted.   A back cam plate is attached to the back side of the inner cylinder. When the inner cylinder is turned 90 ° during unlocking operation or key code conversion operation, the back cam plate abuts a part of the outer cylinder. The rotation cylinder position of 90 degrees is set, The conversion type cylinder lock of Claim 4 characterized by the above-mentioned. The retaining pin is inserted into the inner portion of the key insertion hole of the inner cylinder at a right angle to the axial direction, and the retaining pin is in contact with the convex portion of the normal key and the new normal key , And the removal of the new normal key at the unlocked position, and the convex portion of the conversion key and the new conversion key is cut off so that the key can be removed during the key code conversion operation. The convertible cylinder lock according to claim 1.
  2. The conversion type cylinder lock according to claim 1, wherein the depth of the pin hole formed in the inner cylinder is slightly deeper than the lowest cord position of the pin tumbler. The key insertion hole is formed in the front part of the flange provided in the front part of the inner cylinder, and a stepped recess is provided in a circular shape inside the front part of the outer cylinder so that the flange front part is rotatably inserted. An arc-shaped fitting recess is provided in a part of the step recess to prevent the normal key or the conversion key inserted into the key insertion hole from being pulled out in the middle position and to determine the insertion / removal angle position. An arcuate key position plate is fitted into the fitting recess, the key position plate is provided with a concave groove, and the normal key or the conversion key is provided with a key relief groove,
The angular position of the concave groove of the key position plate is determined when the normal key or the conversion key is inserted into the key insertion hole and the key relief groove is aligned with the concave groove to determine the key insertion / removal angular position. The conversion type cylinder lock according to claim 1, which is set as follows.   The conversion type cylinder lock according to claim 9, wherein a circumferential groove is provided inside a flange front portion of the inner cylinder, and the key position plate is slidably fitted into the circumferential groove.

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