JP5344345B2 - Cylinder lock - Google Patents

Description

  The present invention relates to a cylinder lock suitable for office furniture made of steel sheets such as office desks, racks, bookshelves, lockers, and the like, and in particular, is attached to a plate member constituting these locking objects from either the front or the rear. It relates to possible cylinder locks.

  A conventional cylinder lock mainly includes a metal cylinder lock body having a keyhole and a lock structure, and a metal outer cylinder that houses the cylinder lock body. It is widely used for door panels, casings of electronic devices such as ATMs, office furniture such as office desks and racks.

  Such a cylinder lock is attached to an opening provided in a plate member constituting the locking object. Here, the conventional cylinder lock includes a type that is inserted into the opening from the front of the plate member (front mounting type) and a type that is inserted into the opening from the rear of the plate member (rear mounting type). There are two types, and either type of cylinder lock is selected and applied according to the structure or design of the object to be locked.

  As a front-mounted cylinder lock, for example, in FIGS. 1 and 2 of JP-A-7-238719 (Patent Document 1), a cylinder having a large-diameter flange portion 8 provided on the front end side of a case (outer cylinder) 2 A lock 1 is disclosed. The cylinder lock 1 has a configuration in which an opening having substantially the same diameter as that of the case 2 is provided in a door panel 5 of the vehicle, and the case 2 is inserted into the opening from the front. When the case 2 is inserted from the front of the opening, the flange portion 8 comes into contact with the surface of the door panel 5 and covers the opening. As other front mounting type cylinder locks, for example, Japanese Patent Application Laid-Open No. 2005-146759 (Patent Document 2), Japanese Patent Application Laid-Open No. 2007-46347 (Patent Document 3) and Japanese Utility Model Publication No. 63-54748 (Patent Document 4). ).

  As a rear-mounted cylinder lock, for example, in FIG. 1 of Japanese Patent Laid-Open No. 7-259400 (Patent Document 5), a cylinder in which a large diameter contact portion is coupled to the front end side of a rotor case (outer cylinder) 21 is shown. A locking device is disclosed. The cylinder lock device is provided with an opening having a diameter smaller than that of the contact portion of the rotor case 21 in the vehicle panel, and the contact portion is attached to the opening from the back side of the panel. Other rear mounting cylinder locks are disclosed in, for example, Japanese Patent Application Laid-Open No. 8-184226 (Patent Document 6) and Japanese Utility Model Laid-Open No. 4-119070 (Patent Document 7).

JP-A-7-238719 JP 2005-146759 A JP 2007-46347 A Japanese Utility Model Publication No. 63-54748 JP 7-259400 A JP-A-8-184226 Japanese Utility Model Publication No. 4-119070

  However, the structure of the conventional cylinder lock is different between the front mounting type and the rear mounting type, and there is a problem that two types of cylinder locks must always be prepared. In general, when manufacturing industrial products, the entire product is designed without considering the accessory parts such as cylinder locks, and then the accessory parts such as cylinder locks are selected according to this design. . Due to the structure and design of the designed product, there are many cases in which only one of the front and rear mounting cylinder locks can be applied.

  For example, when it is difficult to secure a space on the back surface side of the plate member due to the structure of the product, the rear mounting type cylinder lock cannot be used. On the other hand, when it is not preferable to provide a protrusion on the surface side of the plate member for product design and safety, a front-mounted cylinder lock cannot be used. For this reason, the manufacturer always has to prepare two types of cylinder locks, and one type of cylinder lock cannot cope with various products having different designs.

  In particular, in the fields where diverse product lineups are required according to the diverse needs of customers, for example, in the office furniture field, various products such as office desks, racks, library, lockers, etc. meet the diverse needs of customers. Each of these products is diversified, and cylinder locks are used for all of these products. If cylinder locks can be used in common, rapid supply of new products and cost reduction can be achieved.

  The present invention has been made in view of the above problems, and can be mounted from either the front or the back according to the design of the product. Rapid supply of new products and cost reduction by sharing parts It aims at providing the cylinder lock which can aim at.

  In order to achieve the above object, a cylinder lock of the present invention is a cylinder lock that is attached to an opening of either a large or small size selectively provided on a plate member constituting a lock object, and has a key hole and a lock structure. A metal cylinder lock body, a metal outer cylinder that houses the cylinder lock body, and a synthetic resin adapter that can be attached to the front end side of the outer cylinder, the front end side of the outer cylinder The small-diameter protruding edge portion and the large-diameter abutting portion are coupled in a step shape, and the adapter includes a design portion that covers the outer edge of the protruding edge portion and the abutting portion of the outer cylinder, An engagement portion that engages with the outer cylinder is formed, and either the small-diameter opening corresponding to the protruding edge portion of the outer cylinder or the large-diameter opening corresponding to the engaging portion of the adapter is formed on the plate member. When the small diameter opening is provided, the protruding edge of the outer cylinder is inserted into the small diameter opening from the rear. When the abutting portion is brought into contact with the back surface of the plate member, while the large-diameter opening is provided, the adapter is attached to the outer cylinder, and the engaging portion of the adapter is connected to the large-diameter opening. The design part is brought into contact with the surface of the plate member.

  In the cylinder lock of the present invention having such a configuration, the outer cylinder that houses the cylinder lock body is provided with a contact portion that comes into contact with the back surface of the plate member, and the adapter that can be attached to the contact portion is provided with the plate member. By providing a design portion that abuts on the surface of the cylinder, it can be used as a cylinder lock of a front mounting type when the adapter is mounted and a rear mounting type when the adapter is not mounted. As a result, the cylinder lock can be applied to a variety of diversified products, and the cylinder lock can be shared.

  Moreover, the design part of an adapter is arrange | positioned so that visual recognition is possible on the surface of a plate member, and comprises the external appearance of this cylinder lock with the front surface of a cylinder lock main body. In the present invention, since the adapter is made of a synthetic resin, the appearance of the cylinder lock can be made novel in combination with the metal cylinder lock body.

  Preferably, the engaging portion of the adapter has an elastic attachment portion that can be attached to the outside of the body portion of the outer cylinder, and the inside of the elastic attachment portion and the outside of the body portion of the outer cylinder, One of these is provided with a protruding angular rib extending in the lateral direction, and a rectangular groove extending in the lateral direction engaging with the angular rib is formed on the other.

  According to the above configuration, the adapter and the outer cylinder are firmly coupled while at the same time serving as a detent for the adapter while being a simple configuration of engaging the angular rib and the angular groove extending in the lateral direction, Integration of the adapter and the outer cylinder can be achieved.

  Preferably, the design portion of the adapter has an annular groove that fits into the outer shape of the contact portion of the outer cylinder.

  According to the said structure, the contact part of an outer cylinder can be utilized for a coupling means with an adapter, and it becomes possible to simplify the structure of this cylinder lock. In addition, when the annular groove, the square rib and the square groove are arranged side by side, the coupling force between the adapter and the outer cylinder becomes extremely large, and a metal flange or the like is integrally formed on the front end side of the metal outer cylinder. There is almost no structural difference from the conventional front-mounted cylinder lock provided. In particular, when the adapter made of synthetic resin is plated, there is no difference in appearance from the conventional front-mounted cylinder lock.

  As a result, this cylinder lock is not inferior to the conventional metal cylinder lock in any of the structure, function and appearance when applied to any of the front mounting type and the rear mounting type, except for the adapter. The main parts can be shared, and when an adapter is used, there is a remarkable effect that the degree of freedom in structure and appearance is greatly improved due to the ease of processing of the synthetic resin.

  Preferably, the design portion of the adapter is made larger in diameter than the engagement portion, the design portion and the engagement portion are coupled in a stepped shape, and the engagement portion adjacent to the design portion is disposed on the outer periphery of the engagement portion. When the claw is protruded and the cylinder lock is inserted into the large-diameter opening, the plate member is sandwiched between the design portion of the adapter and the engaging claw.

  According to the above configuration, the cylinder lock can be fixed very easily to the opening of the object to be locked simply by integrally forming the engaging claw on the synthetic resin adapter. Thus, there is no need to hold the cylinder lock by a separate part on the back side of the plate member, and the configuration can be simplified and the mounting operation can be facilitated.

  According to the cylinder lock of the present invention, it is possible to attach from either the front or the rear according to the design of the product, and it is possible to quickly supply new products and reduce costs by using common parts. Moreover, when using an adapter, the freedom degree of a structure and an external appearance improves significantly by the ease of processing of a synthetic resin.

It is a perspective view showing a cylinder lock concerning one embodiment of the present invention. It is a perspective view which shows the state which removed the adapter from this cylinder lock. FIG. 2A is a front perspective view, FIG. 2B is a rear perspective view, and FIG. 2C is a cross-sectional view taken along line A-A in FIG. . It is sectional drawing of the outer cylinder and cylinder lock main body which comprise this cylinder lock. The procedure for mounting the adapter is shown, in which FIG. (A) is a side view before mounting, and (b) is a partial cross-sectional view after mounting. It is a perspective view which shows this cylinder lock after the said adapter mounting | wearing, and the pull-out end plate. The procedure for attaching the cylinder lock to the front is shown, in which FIG. (A) is a partial cross-sectional view taken along the line BB before the attachment, and FIG. (B) is a partial cross-sectional view taken along the line BB after the attachment. FIG. 3C is a partial cross-sectional view taken along the line CC after attachment. The same figure (a) and (b) is explanatory drawing which shows the attachment procedure in the case of using the said cylinder lock as a back attachment type. The 2nd Embodiment of an adapter is shown, The figure (a) is a front view perspective view, The figure (b) is a back view perspective view. 3A and 3B show a third embodiment of the adapter, in which FIG. 1A is a front perspective view and FIG. 2B is a rear perspective view. FIG. 4A shows a fourth embodiment of the adapter, wherein FIG. 5A is a front perspective view, FIG. 5B is a rear perspective view, and FIG. 5C is a DD line in FIG. It is sectional drawing.

  Hereinafter, a cylinder lock according to an embodiment of the present invention will be described with reference to FIGS.

  1 and 2, a cylinder lock 1 according to the present embodiment includes a synthetic resin adapter 10, a metal outer cylinder 20 to which the adapter 10 is selectively mounted, and a housing in the outer cylinder 20. The cylinder lock body 30 is formed. Such a cylinder lock 1 can be attached to either a front or rear of a plate member constituting a locked object, for example, a steel door such as office furniture, or an opening provided in a drawer end plate (this book). In the embodiment, “drawer end plate 2 (see FIG. 6)” is exemplified as the plate member constituting the lock target.

  That is, when the cylinder lock 1 is attached in front of the plate member, a large-diameter opening corresponding to the adapter 10 is provided in the plate member, and the adapter 10 is attached to the outer cylinder 20 in the large-diameter opening. This cylinder lock 1 is inserted, and the adapter 10 is engaged with the large-diameter opening. On the other hand, when the cylinder lock 1 is attached to the rear of the plate member, a small-diameter opening corresponding to the outer cylinder 20 is provided in the plate member, and the front end portion of the outer cylinder 20 is inserted into the small-diameter opening. The cylinder lock 1 is fixed by a holding means of a separate member. Hereinafter, the adapter 10, the outer cylinder 20, and the cylinder lock body 30 constituting the cylinder lock 1 will be described in detail.

[adapter]
As shown in FIGS. 3A to 3C, the adapter 10 mainly includes a tapered annular design portion 11 and a pair of upper and lower elastic adherend portions 12 and 12 that are engaging portions with the outer cylinder 10. It has a molded configuration.

  When the cylinder lock 1 is attached to the front of the design portion 11, the annular end surface 11a abuts on the periphery of the opening portion of the plate member constituting the lock target, and serves as a stopper. In addition, the design portion 11 is an important part constituting the appearance of the cylinder lock 1 attached to the front side of the locking object, and the appearance component such as shape, color, pattern, texture, etc. is made by being made of synthetic resin. It is possible to design freely.

  In the present embodiment, the shape of the design portion 11 is tapered, but the shape of the design portion 11 is not limited to this. Moreover, the design part 11 may give the difference in an external appearance with the metal outer cylinder 20 and the cylinder lock main body 30 using the color and texture of synthetic resin itself as it is. Alternatively, the surface of the design portion 11 may be plated to eliminate the difference in color and texture from the metal outer cylinder 20 and the cylinder lock body 30. Furthermore, a pattern such as a diagram, color coding, and unevenness can be formed on the surface of the design portion 11.

  The inner shape of the front end side of the design portion 11 is substantially the same as the outer shape of the front end side of the outer tube 20, and the front end opening 11 b having a small diameter corresponding to the projecting edge portion 21 of the outer tube 20 and the contact portion 22 of the outer tube 20. The corresponding large-diameter annular groove 11c continues in a step shape. When the adapter 10 is mounted on the front end side of the outer cylinder 20, the projecting edge portion 21 of the outer cylinder 20 is inserted into the front end opening 11 a of the adapter 10, and both front end surfaces thereof are flush with each other. The contact portion 22 is fitted into the annular groove 11 c of the adapter 10.

  On the other hand, the elastic adherends 12 and 12 have a substantially semicircular cross section obtained by dividing a substantially cylindrical inner diameter substantially equal to the outer diameter of the body 23 of the outer cylinder 20 into two parts. It is configured to be elastically attached to the substantially upper half or the substantially lower half of the body portion 23 of the cylinder 20.

  Each of the elastic adherends 12 has the same configuration, and on the rear end side of the inner surface of each elastic adherent 12, in the horizontal direction (in FIG. 3 (b), horizontally with the longitudinal direction of the elastic adherend 12. A pair of upper and lower square ribs 12a and 12a extending in the direction perpendicular to each other are projected. Further, engaging claws 12b, 12b and 12b, 12b proximate to the annular end surface 11a of the design portion 11 are respectively provided on both end sides of the outer surface of each elastic adherent portion 12. Furthermore, quadrangular engagement recesses 12c and 12c are formed at the top of each elastic adherent portion 12, respectively. The above-mentioned square rib 12a is for coupling the adapter 10 to the outer cylinder 20, and the engaging claw 12b and the engaging recess 12c are for attaching the adapter 10 to the drawer end plate 2 (see FIG. 6). It is. The engagement structure and attachment procedure between these members will be described in detail later.

[Outer cylinder]
As shown in FIGS. 2 and 4, the outer cylinder 20 is a substantially cylindrical metal case that houses the cylinder lock body 30 therein. The outer cylinder 20 has a configuration in which a small-diameter protruding edge portion 21 and a large-diameter abutting portion 22 are connected in a step shape mainly on the front end side of the body portion 23 which is a cylindrical main body. The assembly of the outer cylinder 20 and the cylinder lock body 30 shown in these drawings can be used as a rear-mounted cylinder lock 1. In this case, the drawer end plate 2 has the same diameter as the protruding edge portion 21. A small-diameter opening 2B (see FIGS. 8A and 8B) is provided. When the protruding edge portion 21 of the outer cylinder 20 is inserted or matched with the small diameter opening 2B, the front end surface of the contact portion 22 contacts the end plate 2 around the small diameter opening 2B.

  Here, the protruding amount of the protruding portion 21 forward is at least equal to or greater than the thickness of the drawer end plate 2 so that the protruding portion 21 can be hooked on the small-diameter opening 2B. Thereby, the assembly of the outer cylinder 20 and the cylinder lock body 30 can be positioned with respect to the small diameter opening 2B.

  The body part 23 of the outer cylinder 20 has an outer shape in which the upper part and the lower part of the cylinder are flat surfaces extending in the longitudinal direction. In the middle of each plane, the lateral direction (the longitudinal direction of the body part 23 in FIG. Square grooves 23a and 23a extending in a direction orthogonal to the horizontal direction are formed. As described above, each square rib 12a of the adapter 10 is fitted in each square groove 23a.

  In addition, on both arc-shaped side surfaces of the trunk portion 23, receiving grooves 23b and 23b in a vertical direction (a direction perpendicular to the longitudinal direction of the trunk portion 23 in FIG. 2) close to the rear end surface of the abutting portion 22 are provided. Are formed. Each receiving groove 23b is provided with holding means 3 (see FIG. 8B) provided in advance on the back side of the end plate 2 when the assembly of the outer cylinder 30 and the cylinder lock body 30 is attached to the end plate 2 (FIG. 6) from the rear. ) To engage the outer cylinder 30.

  Further, insertion holes 23c and 23c for inserting the dead bolts 35 of the cylinder lock body 30 are formed on the rear end sides of both side surfaces of the body portion 23 so as to face each other. When the cylinder lock main body 30 is locked and unlocked, the dead bolt 35 inserted into the insertion hole 23c linearly moves in the lateral direction in the figure.

[Cylinder lock body]
As shown in FIG. 4, the cylinder lock body 30 has a configuration in which a large-diameter flange portion 31 is mainly coupled to the front end of a metal inner cylinder 32. A key hole 31 a is opened in front of the flange portion 31, and the key hole 31 a passes through the inner cylinder 32. Such a flange portion 31 is flush with the protruding edge portion 21 of the outer cylinder 20 when the cylinder lock body 30 is accommodated in the outer cylinder 20.

  On the other hand, a plurality of tumbler arrangement grooves 32a, 32a, 32a,... Are formed inside the inner cylinder 32, and tumblers 33, 33, 33,. In the present embodiment, each tumbler 33 is a small metal plate member, and an opening (not shown) overlapping the key hole 31a is provided at the center thereof.

  Although not shown, one end side of each tumbler 33 passes through the inner cylinder 32 and contacts the outer cylinder 20 to lock the inner cylinder 32 so as not to rotate within the outer cylinder 20. When a key (not shown) that fits into the keyhole 31a is inserted and the contact between all the tumblers 33, 33, 33... And the outer cylinder 20 is simultaneously released, the inner cylinder 32 is rotated. It has become.

  A drive pin 34 projects from the rear end surface of the inner cylinder 32, and this drive pin 34 is engaged with a guide groove 35 a formed in the short direction of the dead bolt 35. When the lock of each tumbler 33 is released by a suitable key and the inner cylinder 32 rotates, this rotational motion is converted into a linear motion by the drive pin 34 and the guide groove 35a, and the dead bolt 35 linearly moves in the lateral direction.

[Front mounting procedure]
Next, a procedure for attaching the cylinder lock 1 having the above configuration to the drawer end plate 2 from the front will be described with reference to FIGS.

  First, as shown in FIG. 5A, the adapter 10 is attached to the assembly of the outer cylinder 20 and the cylinder lock body 30. When the adapter 10 is pushed into the front end side of the outer cylinder 20, each elastic adherend 12 is elastically deformed, and the adapter 10 can be attached to the front end side of the outer cylinder 20.

  5B, the contact portion 22 of the outer cylinder 20 is fitted in the annular groove 11c of the adapter 10, and each angular rib 12a of the adapter 10 is engaged with each angular groove 23a of the outer cylinder 20. Match. Thereby, the adapter 10 and the outer cylinder 20 are firmly coupled. In the present embodiment, when the adapter 10 is mounted on the outer cylinder 20, the front end surface of the adapter 10, the front end surface of the projecting edge portion 21 of the outer cylinder 20, and the front surface of the flange portion 31 of the cylinder lock body 30 are all It is designed to be flush with each other.

  Next, as shown in FIG. 6, the cylinder lock 1 with the adapter 10 attached is attached to the drawer end plate 2 from the front. In this case, the end plate 2 is previously formed with a large-diameter opening 2 </ b> A that is substantially equal to the outer diameter of the elastic adherends 12, 12 of the adapter 10.

  Here, in the present embodiment, the periphery of the large-diameter opening 2A of the end plate 2 that is a metal plate is bent to form a circular folded portion 2a that protrudes to the back side of the end plate 2. The amount of protrusion of the folded portion 2a is substantially equal to the distance from the annular end surface 11a of the design portion 11 of the adapter 10 to the engaging claw 12b (strictly, the distance obtained by subtracting the plate thickness of the end plate 2 from this distance). It is as. A pair of engaging pieces 2b and 2b are coupled to the upper and lower sides of the folded portion 2a.

  When attaching the cylinder lock 1 to the large-diameter opening 2A of the end plate 2 as shown in FIG. 7A, the cylinder lock 1 is tilted so that the dead-bolt 35 first moves to the large-diameter opening 2A. insert. Then, after inserting the dead bolt 35 into the large-diameter opening 2A, the main cylinder lock 1 is rotated so that the inclination is restored, and the main cylinder lock 1 is pushed into the large-diameter opening 2A.

  Then, as shown in FIG. 7B, the cylinder lock 1 is attached to the large-diameter opening 2A. At this time, as shown in FIG. 7 (c), the annular end surface 11a of the design portion 11 of the adapter 10 abuts the periphery of the large-diameter opening 2A of the end plate 2, and each elastic cover is in the vicinity of the annular end surface 11a. The landing portion 12 is held by the folded portion 2a. Moreover, each engaging claw 12b of each elastic adherend part 12 is each engaged with the edge part of the folding | returning part 2a. Further, each engagement piece 2b of the folded portion 2a engages with each engagement recess 12 of each elastic adherent portion 12. As a result, the cylinder lock 1 is firmly fixed to the end plate 2.

[Rear mounting procedure]
Next, a procedure for attaching the cylinder lock 1 having the above-described configuration to the drawer end plate 2 from the rear will be described with reference to FIGS. 8 (a) and 8 (b).

  When the cylinder lock 1 is attached to the drawer end plate 2 from the rear, as shown in FIG. 2A, a small-diameter opening having a size equal to the outer diameter of the protruding portion 21 of the outer cylinder 20 is previously provided in the end plate 2. 2B is formed, and holding means for fixing the cylinder lock 1 on the back side of the end plate 2 is provided. The structure of the holding means is not particularly limited as long as the cylinder lock 1 can be firmly fixed.

  For example, the holding means 3 of the present embodiment has a configuration in which a cylindrical storage portion 3A protrudes in the hollow of a synthetic resin cup-shaped main body. The inner diameter of the cylindrical storage portion 3 </ b> A is substantially the same as the outer diameter of the body portion 23 of the outer cylinder 20. A pair of square engaging claws 3a and 3a project from the left and right inside the front end of the cylindrical storage portion 3A so as to face each other. Further, a gap having a size equal to the thickness of the contact portion 22 of the outer cylinder 20 is formed between the front end surface 3b of the cylindrical storage portion 3A and the back surface of the end plate 2. Further, a notch 3B corresponding to the dead bolt 35 of the cylinder lock 1 is provided at the rear end of the cylindrical storage portion 3A.

  When the cylinder lock 1 is attached to the drawer end plate 2 from the rear, the cylinder lock 1 is inserted from the rear of the holding means 3 to the back of the cylindrical storage portion 3A (see FIG. 8A). Then, as shown in FIG. 4B, the protruding edge portion 21 of the outer cylinder 20 is inserted into the small diameter opening 2B of the end plate 2, and the contact portion 22 of the outer cylinder 20 is around the small diameter opening 2B. Is sandwiched between the rear surface of the end plate 2 and the front end surface 3b of the cylindrical storage portion 3A. Further, each engaging claw 3 a of the cylindrical storage portion 3 </ b> A engages with each receiving groove 23 b of the outer cylinder 20. As a result, the cylinder lock 1 is firmly fixed to the back side of the end plate 2.

[Function and effect of this cylinder lock]
As described above, according to the cylinder lock 1 according to the present embodiment, the outer cylinder 20 that houses the cylinder lock body 30 is provided with the abutting portion 22 that abuts against the back surface of the drawer end plate 2 and this abutment. By providing the design part 11 that contacts the surface of the end plate 2 on the adapter 10 that can be attached to the part 22, the adapter 10 is used as a front-mounted cylinder lock 1 when the adapter 10 is mounted and as a rear-mounted cylinder lock 1 when the adapter 10 is not mounted. be able to. As a result, the cylinder lock 1 can be applied to various diversified products, and the cylinder lock 1 can be shared.

  The design portion 11 of the adapter 10 is disposed on the surface of the end plate 2 so as to be visible, and constitutes the appearance of the cylinder lock 1 together with the front surface of the cylinder lock body 30. When the adapter 10 is made of synthetic resin, the appearance of the cylinder lock 1 can be made novel in combination with the metal cylinder lock body 30.

  The adapter 10 and the outer cylinder 20 are firmly coupled to each other while the corner ribs 12a and the corner grooves 23a extending in the lateral direction are engaged. 10 and the outer cylinder 20 can be integrated.

  By providing the adapter 10 with the annular groove 11c, the contact portion 22 of the outer cylinder 20 can be used as a coupling means with the adapter 10, and the configuration of the cylinder lock 1 can be simplified. . Further, since the annular groove 11c, the square rib 12a, and the square groove 23a are arranged side by side, the coupling force between the adapter 10 and the outer cylinder 20 becomes extremely large, and a metal flange or the like is formed on the front end side of the metal outer cylinder 20. There is almost no structural difference from the conventional front-mounted cylinder lock provided integrally. In particular, when the adapter 10 made of synthetic resin is plated, there is no difference in appearance from the conventional front-mounted cylinder lock.

  As a result, the cylinder lock 1 is not only inferior to the conventional metal cylinder lock in terms of structure, function, and appearance, regardless of whether it is applied to any of the front mounting type and the rear mounting type. In the case of using the adapter 10, there is a remarkable effect that the degree of freedom in structure and appearance is greatly improved due to the ease of processing of the synthetic resin.

[Second embodiment of adapter]
The adapter used for the cylinder lock of the present invention is not limited to the above-described embodiment. The adapter constitutes an external appearance together with the front surface provided with the keyhole of the cylinder lock body when the cylinder lock is of a front mounting type and is mounted forward. Various modifications can be made to the configuration of the adapter from the viewpoints of attachment and appearance.

  For example, like the adapter 40 shown in FIGS. 9A and 9B, the elastic adherend 42 may be cylindrical. The inner diameter of the elastic adherent portion 42 is substantially the same as the outer diameter of the barrel portion 23 of the outer cylinder 20 so that the elastic adherent portion 42 completely covers substantially half of the barrel portion 23. On the inner upper and lower sides of the elastic adherence portion 42, lateral angular ribs 42a and 42a that respectively fit into the angular grooves 23a and 23a of the body portion 23 project.

  Such an adapter 40 is mounted by pushing the adapter 40 into the front end side of the outer cylinder 20 while elastically deforming the elastic adherend 42. By making the elastic adherent portion 42 cylindrical, the elastic adherent portion 42 is not easily deformed after being attached at one end, and the adapter 40 can be firmly attached to the front end side of the outer cylinder 20. it can.

[Third embodiment of adapter]
For example, like the adapter 50 shown in FIGS. 10A and 10B, the design of the design portion 51 can be stepped. Since the adapter 50 is made of a synthetic resin, it is possible to freely design appearance components such as shape, color, pattern, texture, etc., compared to metal parts, and this cylinder lock mounted on the front of the locking object. The appearance of 1 can be made novel and unprecedented.

[Fourth Embodiment of Adapter]
For example, as in the adapter 60 shown in FIGS. 11A to 11C, a pair of engaging claws 62c and 62c are provided so as to protrude from the upper and lower elastic adherends 62 and 62, respectively. Each engagement claw 62c is a wide plate-like piece that can move up and down with the rear end portion as a fulcrum, and is inclined downward from the front to the rear. The distance between the front end portion of each engagement claw 62c and the annular end surface 61a of the design portion 61 is approximately the same as the plate thickness of a plate member that forms a lock target (not shown). As in the above-described embodiments, lateral angular ribs 62 a and 62 a protrude from the inside of each elastic adherend 62.

  Such an adapter 60 is attached to the front end side of the outer cylinder 20 by the same procedure and structure as in FIGS. When the cylinder lock 1 equipped with the adapter 60 is inserted from the front into a large-diameter opening of a locking object (not shown), each engaging claw 62c is elastically deformed downward and passes through the large-diameter opening. When the annular end surface 61a of the design portion 61 contacts the plate member around the large-diameter opening, each engagement claw 62c is restored to the original state, and the annular end surface 61a and each engagement claw 62c are large. The plate member around the diameter opening is sandwiched. As a result, the cylinder lock 1 can be reliably prevented from falling forward and rearward, and the cylinder lock 1 can be firmly attached to the object to be locked.

DESCRIPTION OF SYMBOLS 1 Cylinder lock 10, 40, 50, 60 Adapter 11, 51, 61 Design part 11a, 61a Annular end surface 11b Front end opening 11c Annular groove 12, 42, 62 Elastic adhesion part (engagement part)
12a, 42a Square rib 12b Engagement claw 12c Engagement recess 62c Engagement claw 20 Outer cylinder 21 Projection edge part 22 Contact part 23 Trunk part 23a Square groove 23b Receiving groove 23c Insertion hole 30 Cylinder lock body 31 Flange part 31a Key hole 32 Inner cylinder 32a Tumbler arrangement groove 33 Tumbler 34 Drive pin 35 Dead bolt 35a Guide groove 2 Drawer end plate (plate member constituting locking object)
2A Large-diameter opening 2B Small-diameter opening 2a Folding part 2b Engagement piece 3 Holding means 3A Cylindrical storage part 3a Engaging claw 3b Front end face 3B Notch

Claims (4)

A cylinder lock that is attached to either a large or small opening selectively provided on a plate member constituting the locking object,
A metal cylinder lock body having a keyhole and a lock structure, a metal outer cylinder that houses the cylinder lock body, and a synthetic resin adapter that can be attached to the front end side of the outer cylinder,
On the front end side of the outer cylinder, a small-diameter protruding edge portion and a large-diameter contact portion are coupled in a stepped shape,
The adapter includes a design portion that covers the outer edge of the protruding portion and the contact portion of the outer cylinder, and an engaging portion that engages with the outer cylinder,
The plate member is provided with either a small-diameter opening corresponding to the protruding edge of the outer cylinder, or a large-diameter opening corresponding to the engaging part of the adapter,
When the small-diameter opening is provided, the protruding edge portion of the outer cylinder is inserted into the small-diameter opening from the rear, and the abutting portion is brought into contact with the back surface of the plate member, while the large-diameter opening The adapter is attached to the outer cylinder, the engaging portion of the adapter is inserted into the large-diameter opening portion from the front, and the design portion is brought into contact with the surface of the plate member. And cylinder lock.   The engaging portion of the adapter has an elastic attachment portion that can be attached to the outside of the body portion of the outer cylinder, and either the inside of the elastic attachment portion or the outside of the body portion of the outer cylinder 2. The cylinder lock according to claim 1, wherein a square rib extending in the lateral direction protrudes from one side, and a square groove extending in the lateral direction engaging with the square rib is formed on the other side.   The cylinder lock according to claim 1 or 2, wherein the design portion of the adapter has an annular groove that fits into the outer shape of the contact portion of the outer cylinder.   The design portion of the adapter is made larger in diameter than the engagement portion, the design portion and the engagement portion are coupled in a stepped shape, and an engagement claw close to the design portion is provided on the outer periphery of the engagement portion. The cylinder lock according to any one of claims 1 to 3, wherein the plate member is sandwiched between a design portion of the adapter and an engaging claw when projecting and inserting the cylinder lock into the large-diameter opening.

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