JP3110279U - Locking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking device provided with a cylinder lock so that a key can be easily inserted into a keyhole regardless of the direction of the key and a sufficient crime prevention effect can be obtained.
In a horseshoe lock provided with a cylinder lock 20 for holding a loop shape formed by inserting an end of a kanuki into a case, a key plate of a key 4 for unlocking the cylinder lock 20 is provided. In 52, a concave groove 56 is formed on both plate surfaces 54 along the insertion direction of the key 4 so as to have the same shape when the plate surface is viewed from above. On the other hand, when the key 4 is inserted into the hole edge of the key insertion hole of the tumblers 22 to 32 to be inserted into the inner cylinder 36 of the cylinder lock, the tumblers 22 to 32 are engaged. The 2nd convex part which aligns is formed.
[Selection] Figure 2

Description

  The present invention relates to a locking device having a cylinder lock.

  Conventionally, as a locking device for bicycles, there is a horseshoe lock that is mounted on a rear wheel fork or the like and makes a wheel non-rotatable by sliding a cannula between spokes to prevent running, and a cylinder lock as a lock of this horseshoe lock What is used is known. However, the cylinder lock used in such a horseshoe lock has a problem that it is vulnerable to unauthorized unlocking such as picking because the number of keyholes and keys used is small.

On the other hand, as a method of avoiding the above problem, a horseshoe lock case is provided with a structure capable of attaching a plurality of types of cylinder locks, and an off-the-shelf cylinder lock having a different keyhole shape is attached to the same type of case, so that There has been proposed a method of increasing the number of keyholes and keys at a low cost without recreating (for example, see Patent Document 1).
JP-A-8-120994

  However, even if the above method is used, the number of cylinder locks that can be applied is limited due to restrictions such as size, and many of the keys themselves can be easily copied, and the crime prevention effect is insufficient. In addition, cylinder lock keys used for horseshoe locks, etc., are not symmetrical, and there are many things that require the key insertion direction to be aligned with the keyhole, making it very difficult to unlock in narrow or dark places. Met. In addition, there is a problem that it is difficult to insert the key because the key mountain is caught in the keyhole.

  The present invention has been made in view of these problems, and in a locking device having a cylinder lock, it is possible to easily insert a key into a keyhole regardless of the direction of the key, and to obtain a sufficient crime prevention effect. Objective.

  The device according to claim 1, which has been made to achieve such an object, includes a lock body that forms a loop body together with the connection member by inserting a part of the elongated connection member into the insertion hole. And a locking device having a cylinder lock for engaging the engaged portion formed on the connecting member to maintain the loop shape inside the lock body, the cylinder lock being A plurality of tumblers having a first convex portion formed at the periphery and a key insertion hole formed at a substantially central portion, and formed in a columnar shape, drilled from one end of the column toward the other end. A key insertion hole, an engagement portion projecting from an end opposite to the key insertion hole of the cylinder, and engageable with the engaged portion; an interior including the key insertion hole from a side wall of the cylinder A plurality of tumbler insertion holes for inserting the tumbler. And a hollow portion for rotatably supporting the inner tube, and a tumbler engaging groove that can be engaged with the first convex portion of the tumbler is formed on an inner peripheral surface of the hollow portion. A plurality of outer cylinders and a plurality of the tumblers that are inserted into the respective tumbler insertion holes together with the respective tumblers and urge the respective tumblers outwardly so that the first convex portions engage with tumbler engaging grooves of the outer cylinder. Coil spring, and when the key is inserted into the key insertion hole, the engagement between the first protrusion and the tumbler engagement groove is released, and the inner cylinder can be rotated. When the key is rotated, the inner cylinder rotates and the engagement between the engaging portion of the inner cylinder and the engaged portion of the connecting member is released, and a part of the connecting member is locked with the lock. It is configured to be removable from the insertion hole of the main body, and the key includes a flat key plate and a knob. Formed on the two plate surfaces of the key plate so that the recesses have the same shape when viewed from above, along the key insertion direction, and the key insertion holes of the tumbler are formed. The hole edge is formed with a second convex portion that engages with the concave portion of the key when the key is inserted and aligns the tumbler.

  Thus, the locking device of the present invention is formed on the connection member when a part of the connection member is inserted into the insertion hole of the lock body and a loop body for locking is formed by the connection member and the lock body. A cylinder lock is provided for engaging with the engaged portion and retaining the loop shape. The key to be inserted into the cylinder lock is formed so that the recesses have the same shape when viewed from above the plate surface along the key insertion direction on both plate surfaces of the flat plate-like key plate. On the other hand, a second convex portion for engaging the concave portion of the key and aligning each tumbler when the key is inserted is provided inside the key insertion hole of the tumbler constituting the cylinder lock. .

  When the key is inserted into the key insertion hole of the cylinder lock, the concave portion of the key and the second convex portion of the tumbler are engaged with each other so that the tumblers are aligned, and the first convex portion of the tumbler and the tumbler of the outer cylinder are aligned. The engagement with the engagement groove is released, and the inner cylinder becomes rotatable. Further, when the key is rotated in this state, the inner cylinder is rotated, and the engagement between the engaging portion of the inner cylinder and the engaged portion of the connecting member is released, and a part of the connecting member is attached to the lock body. It can be removed from the insertion hole.

  In other words, according to this locking device, the inner cylinder of the cylinder lock can be rotated, and the engagement between the engaging portion of the inner cylinder and the engaged portion of the connecting member is released on both plate surfaces of the key plate. Since a key having a recess formed along the key insertion direction is used, a special cutting machine is required for processing the key. For this reason, it is possible to prevent the key from being easily duplicated, and the crime prevention effect can be improved as compared with the conventional locking device. Further, since the key pile does not protrude from the outer shape, the insertion and removal of the key is smooth, and the concave portions provided on both side surfaces have the same shape, so that it can be used regardless of the front and back sides, which is convenient.

  In the locking device according to claim 1, the recess of the key plate may be a recess formed so that the groove width continuously changes as described in claim 2. As described in 3, it is good also as the hollow formed along the side edge. If it does in this way, the effect similar to the locking device of Claim 1 can be acquired.

On the other hand, in the locking device according to claim 1, the cylinder lock may include a cover capable of releasing and closing the key insertion hole of the inner cylinder, as described in claim 4.
In this way, since the key insertion hole is closed by the cover when the key is not inserted, it is possible to prevent water or dust from entering the key hole.

  And in the locking device according to claim 4, the cover may be formed so as to cover the entire surface of the key insertion hole of the inner cylinder and the key insertion hole. As shown in the figure, a cover support portion, which is a recess for slidably supporting the cover, is provided on the key insertion surface which is the end surface on the side where the key of the inner cylinder is inserted. The cover may be supported by the urging member at a position where the cover is urged in one direction and the key insertion hole is closed.

  This is convenient because the key can be inserted into the cylinder lock by sliding the cover by inserting the key by applying the key to the cover. And since the plate-shaped cover is only supported by the urging member, a mechanism for closing the key insertion hole can be realized at low cost.

  Furthermore, in the locking device according to claim 5, as described in claim 6, the cylinder lock is provided with a key insertion hole at a substantially central portion and at an end of the inner cylinder on the key insertion surface side. Provide a cap that can be fitted, chamfer the cap side edge of the surface facing the end surface supported by the biasing member of the cover, and the side that corresponds to the chamfered side of the cover of the key insertion hole of the cap Alternatively, a guide for guiding the tip of the key to the chamfer of the cover may be provided.

  In this case, the key is inserted into the chamfered portion of the cover along the guide provided in the key insertion hole of the cap, and the key is inserted to slide the cover to a position where the cover is released more easily. It is convenient because it can be inserted into the insertion hole.

  In the locking device according to claim 6, the cylinder lock has tumbler insertion holes alternately drilled from both side surfaces of the side wall of the inner cylinder, as described in claim 7, and the tumbler is connected to the inner cylinder. May be inserted alternately from both sides.

  In this way, the insertion direction of the tumbler is reversed. For example, even when the same tumbler is used, the position of the second convex portion that engages with the key is different when inserted from the right side and when inserted from the left side. Different. For this reason, the number of counts can be doubled with the same number of tumblers, and the crime prevention effect can be further enhanced.

  And, the portion of the tumbler insertion hole where the coil spring is inserted needs to be wider than the other portions, but the insertion portion of the coil spring is provided alternately on both sides, so the interval between each tumbler insertion hole And the length of the inner cylinder can be shortened while providing the same number of tumbler insertion holes. For this reason, the entire length of the cylinder lock can be shortened, and the length of the key can be shortened, so that it can be incorporated into a smaller connecting member and the processing cost of the cylinder lock and the key itself can be reduced. be able to.

Further, in the locking device according to claim 7, the recess formed in the key plate may be asymmetric with a line parallel to the key insertion direction and passing through the midpoint of the side in the width direction as a center line.
If it does in this way, since the shape of the side wall which a crevice forms is doubled, it is possible to increase the number of keys.

Embodiments of the present invention will be described below with reference to the drawings.
[First embodiment]
First, a first embodiment of the present invention will be described. FIG. 1 is an external view showing the external appearance of the horseshoe lock 2 and the key 4 of the first embodiment, and FIG. 2 shows the internal configuration of the cylinder lock 20 attached to the horseshoe lock 2 of the first embodiment and the shape of the key 4. FIG. 3A is an outline drawing showing the shape of the tumbler 22, FIG. 3B is an outline drawing showing the shape of the stopper tumbler 34, and FIG. 4A is a cover of the cylinder lock 20. FIG. 4B is an external view showing the shape of the cover 48. FIG.

  The locking device 1 according to the first embodiment includes a horseshoe lock 2 and a key 4 for unlocking the horseshoe lock 2. As shown in FIG. 1, the horseshoe lock 2 is an unlocked case that is stored in the case 6 by releasing the bridge from a hollow case 6 that is curved in an arc shape and a locking position (see FIG. 1) that bridges both ends of the case 6. A rod-shaped body of kanuki 8 that can be slid between positions, and projecting out of the kanuki 8 and projecting out of the case through a slit 10 formed in the case 6. And a cylinder lock 20 that engages the engaged portion of the cannula 8 and makes it non-slidable at the locking position.

  The internal structure and the like of the horseshoe lock 2 of the first embodiment are the same as those of the conventional horseshoe lock. In addition to the above components, one end is fixed to the case 6 and the other end is the case 6 in the case 6. A coil spring (not shown) connected to the end, a connecting member (not shown) connected to the cylinder lock 20 and engaged with the cannula 8 and held in the locked position are accommodated in the case 6. .

  On the other hand, as shown in FIG. 2, the key 4 includes a synthetic resin knob 62 and a long key plate 52 having a length substantially equal to the inner cylinder 36 of the cylinder lock 20 (see FIG. 2). And the front-end | tip part 60 is formed in the taper shape so that the key plate 52 may be inserted in the cylinder lock 20 easily. Further, the plate surface 54 of the key plate 52 is formed with a concave groove 56 whose groove width continuously changes along the insertion direction of the key 4, and the concave groove 56 is parallel to the insertion direction of the key 4. And a line passing through the center in the width direction is formed asymmetrically with the center line as the center line. The concave groove 56 is formed so as to have the same shape on both plate surfaces when the plate surface 54 of the key plate 52 is viewed from above, and is configured to be usable regardless of the front and back sides.

  As shown in FIG. 2, the cylinder lock 20 has six tumblers 22 to 32 each having a key insertion hole for inserting a key in the center portion, and a notch for inserting the key in the center portion. A stopper tumbler 34, an inner cylinder 36 having a tumbler insertion hole 36a for inserting the tumblers 22 to 32 and the stopper tumbler 34, and a hollow portion for rotatably supporting the inner cylinder 36. The outer cylinder 38 in which grooves for engaging the tumblers 22 to 32 and the stopper tumbler 34 are formed on the inner peripheral surface of the hollow portion, and the tumbler insertion holes 36a together with the tumblers 22 to 32 and the stopper tumbler 34, respectively. The tumblers 22 to 32 and the stopper tumbler are inserted so that the tumblers 22 to 32 and the stopper tumbler 34 engage with the grooves formed on the inner peripheral surface of the outer cylinder 38. A plurality of tumbler springs 40 each urging the outer side 34, a side bar 42 capable of reciprocating in the radial direction between the outer cylinder 38 and the inner cylinder 36, and an outward urging force applied to the side bar 42. Between the cap 46 and the inner cylinder 36 at a position where the key insertion hole of the inner cylinder 36 is closed. And a cover spring 50 for allowing the cover 48 to slide to a position where the key insertion hole of the inner cylinder 36 is released and closed.

  The tumblers 22 to 32 and the stopper tumbler 34 are made of a metal thin plate material, and spring support portions 22b to 34b for supporting the tumbler spring 40 are formed on the outer peripheral edge. As shown in FIG. 3A, the tumbler 22 is provided with a first convex portion 22c at a position engaging with a groove formed on the inner peripheral surface of the outer cylinder 38 on the outer peripheral edge, A part of the side bar 42 is engaged, and a side bar support groove 22d for allowing the side bar 42 to move in the radial direction is formed. Further, a second convex portion 22e is provided at a position engaging with a concave groove 56 formed on the plate surface 54 of the key plate 52 of the key 4 at the hole edge of the key insertion hole 22a formed at the center portion. . In addition, also about the tumblers 24-32, the convex part and groove | channel similar to the tumbler 22 are changed and formed. On the other hand, as shown in FIG. 3B, the stopper tumbler 34 is formed with a notch 34a through which a key is inserted.

  The inner cylinder 36 is formed in a cylindrical shape as shown in FIGS. 2 and 4A, and has a shape and a size that match the outer shape of the key plate 52 of the key 4 from one end side of the column toward the other end. A key insertion hole is formed in a rectangular shape, and a protrusion 36b connected to a connecting member that engages with an engaged portion formed on the cannula 8 protrudes from the opposite end of the cylinder. . A tumbler insertion hole 36a is formed at regular intervals in the length direction from the side wall of the cylinder to the inner region including the key insertion hole, and the tumblers 22 to 32 and the stopper tumbler 34 are provided at one end of each tumbler insertion hole 36a. The spring insertion portions 36c into which the tumbler springs 40 are inserted to be urged outward and pressed into the grooves formed on the inner peripheral surface of the outer cylinder 38 are alternately formed on both side surfaces. Further, a rectangular side bar support hole 36d for supporting the side bar 42 is formed in the side wall of the inner cylinder 36, and a leg into which a part of the side bar 42 can be inserted is formed at the bottom of the side bar support hole 36d. A part insertion groove (not shown) is formed and penetrates the key insertion hole and the tumbler insertion hole 36a.

  Also, a cover support hole 36e, which is a substantially square recess, is formed around the key insertion hole on the key insertion surface, which is an end surface on the side where the key is inserted, and a side bar support hole 36d of the cover support hole 36e is formed. A cover spring support groove 36f for supporting the cover spring 50 is formed in the central portion of the side wall on the formed side. Then, four locking holes 36g for caulking the cap 46 are formed on the side wall of the inner cylinder 36 on this surface side.

  As shown in FIG. 2, the outer cylinder 38 is a cylindrical body that is open at both ends and partially protrudes from a side bar engaging portion 38 a that engages with the side bar 42 when the inner cylinder 36 is housed inside. , Fixed in the case 6. And the tumbler engaging groove 38b engaged with the 1st convex parts 22c-32c of the tumblers 22-32 is formed in an inner peripheral surface in a both-side wall facing the position 90 degree different from the sidebar engaging part 38a. A stopper tumbler engaging portion 38c that engages with the outer peripheral edge of the stopper tumbler 34 and restricts the rotation of the inner tube 36 within the outer tube 38 is formed at the end on one end side. When the inner cylinder 36 is supported in the outer cylinder 38, the stopper tumbler 34 is rotated by rotating the inner cylinder 36 in the outer cylinder 38 by engaging the outer peripheral edge with the stopper tumbler engaging portion 38c. The angle is restricted to a constant angle (for example, approximately 90 degrees), and the inner cylinder 36 is prevented from coming out of the outer cylinder 38.

  The side bar 42 has an engagement head 42a having a shape obtained by cutting a cylinder that can be engaged with the side bar engagement portion 38a of the outer cylinder 38 in half, and a rectangular long side that bisects the rectangular cut surface. A leg portion 42b that protrudes on a parallel center line and is inserted into a leg portion insertion groove formed in the bottom portion of the side bar support hole 36d of the inner cylinder 36. Further, the engagement head portion 42a has a leg portion. Support grooves 42c for supporting the sidebar springs 44 are formed on both sides of 42b.

The side bar spring 44 is a plate spring configured by bending a metal thin thin plate having a width accommodated in the support groove 42 c of the side bar 42.
As shown in FIG. 4A, the cap 46 has a cylindrical shape with one end formed in a size that can be fitted into the inner cylinder 36, and a rectangular key insertion hole 46a is formed at the center. At the edge of the opening, four locking claws 46b that engage with the locking holes 36g of the inner cylinder 36 are provided. One side of the long side of the key insertion hole 46a has a cut at its end, and this portion is bent approximately 45 degrees toward the inside of the cylinder. The guide 46c for guiding to the section is configured.

  As shown in FIG. 4B, the cover 48 is formed with a notch 48a for supporting one end of the cover spring 50 on the end surface on the long side of the rectangular plate piece, and chamfered 48b on one end of the opposite end surface. Is formed.

  The cover spring 50 is a coil spring, and is formed in such a length that the edge 48c on the end face side of the chamfer 48b of the cover 48 is supported at a position where it overlaps with the edge of the guide 46c of the cap 46 when not being contracted. .

  In the first embodiment, the case 6 corresponds to the lock body of the present invention, the kanuki 8 corresponds to the connecting member of the present invention, the tumbler spring 40 corresponds to the coil spring of the present invention, the protrusion 36b, The connecting member corresponds to the engaging portion of the present invention, and the cover spring 50 corresponds to the biasing member of the present invention.

  Next, a method for assembling the cylinder lock 20 will be described. First, the cover 48 is accommodated in the cover support hole 36e of the inner cylinder 36 so that the notch 48a faces the cover spring support groove 36f and the chamfer 48b is on the near side. Then, the cover spring 50 is housed in the cover support hole 36e so that one end thereof is supported by the notch 48a of the cover 48 and the other end is supported by the cover spring support groove 36f. Here, the cap 46 is fitted to the key insertion surface side of the inner cylinder 36 so that the edge of the guide 46 c overlaps the edge 48 c of the chamfer 48 b of the cover 48, and is engaged with the locking hole 36 g of the inner cylinder 36. The pawl 46b is engaged. The cap 46 is fixed by caulking the engaging portion, and the cover 48 can slide to a position where the key insertion hole 46a of the cap 46 is opened and closed inside the cover support hole 36e.

  On the other hand, the tumbler spring 40 is contracted and inserted into the spring support portions 22b to 34b of the tumblers 22 to 32 and the stopper tumbler 34, and is supported by the repulsive force. And the stopper tumbler 34 which supported the tumbler spring 40 is inserted in the tumbler insertion hole 36a by which the protrusion 36b of the inner cylinder 36 is protrudingly provided. Further, the tumblers 22 to 32 are sequentially inserted from both sides sequentially from the tumbler insertion hole 36a on the key insertion surface side. Then, the side bar spring 44 is inserted into the side bar support hole 36d, and the side bar 42 is inserted into the leg insertion groove of the inner cylinder 36 while the side bar 42 is inserted, while the side bar spring 44 is connected to the key insertion surface side. Is inserted so as to be supported by the support groove 42c on the left side when viewed from above. In this state, the tumblers 22 to 32, the stopper tumbler 34, and the side bar 42 are urged outward by the tumbler spring 40 and the side bar spring 44, respectively, and protrude from the side wall of the inner cylinder 36.

  Here, the key 4 is inserted from the key insertion hole 46a of the cap 46 and inserted into the inner cylinder 36, and the second convex portions 22e to 32e of the key insertion holes 22a to 32a of the six tumblers 22 to 32 are locked. The tumblers 22 to 32 are accommodated in the inner cylinder 36 by engaging with the side walls 58 of the concave grooves 56 formed on the plate surface 54 of the fourth plate, and the side bar support grooves 22d to 32d of the tumblers 22 to 32 are further provided. The side bars 42 are aligned and can be stored in the inner cylinder 36. In this state, the inner cylinder 36 is inserted into the outer cylinder 38 while pressing the stopper tumbler 34 in a direction to be accommodated in the inner cylinder 36, and the stopper tumbler 34 is engaged with the stopper tumbler engaging portion 38c. At the same time, the key 4 is removed with the side bar 42 engaged with the side bar engaging portion 38a.

  In the locking device 1 of the first embodiment configured as described above, a part of the cannula 8 of the horseshoe lock 2 is inserted into the insertion hole of the case 6, and the cannula 8 and the case 6 form a loop body for locking. When this is done, the cylinder lock 20 is provided for engaging the engaged portion formed on the cannula 8 via a connecting part and maintaining the loop shape. The key 4 to be inserted into the cylinder lock 20 has a groove 56 formed asymmetrically along the insertion direction of the key 4 on both plate surfaces of the flat key plate 54. Are formed so as to have the same shape when viewed from above. On the other hand, inside the key insertion holes 22a to 32a of the tumblers 22 to 32 constituting the cylinder lock 20, when the key 4 is inserted, the tumblers 22 are engaged with the side walls 58 of the concave grooves 56 of the key 4. Second convex portions 22e to 32e for aligning .about.32 are provided.

  The horseshoe lock 2 includes an engaged portion (not shown) formed on the cannula 8 and a projection 36b (illustration of the cylinder lock 20) formed on the cannula 8 by inserting a part of the cannula 8 into the insertion hole of the case 6. 2), the inner cylinder 36 is rotated in the opposite direction to the timepiece via the protrusion 36b. And while the 1st convex parts 22c-32c of the tumblers 22-32 and the tumbler engaging groove 38b engage, the engaging head 42a of the side bar 42, the side bar engaging part 38a of the outer cylinder 38, Are engaged, the inner cylinder 36 cannot be rotated, and is locked.

  On the other hand, in the horseshoe lock 2 in the locked state, when the key 4 is inserted into the key insertion hole of the cylinder lock 20, the side wall 58 of the concave groove 56 of the key 4 and the second convex portions 22e to 32e are engaged with each other. 22 to 32 are aligned, the engagement between the first protrusions 22a to 32a and the tumbler engaging groove 38b of the outer cylinder 38 is released, and the engaging head 42a of the side bar 42 can be stored in the inner cylinder 36. Thus, the inner cylinder 36 can be rotated. Then, by rotating the key 4 in the same direction as the timepiece, the projection 36b also rotates in the same direction as the timepiece with the inner cylinder 36, and the engaged portion formed on the cannula 8 and the coupling member are engaged. Since it is released, the kanuki 8 is automatically stored in the case 6 according to the urging force of the coil spring, and is unlocked.

  That is, according to the locking device 1, the concave groove 56 formed in the key 4 is difficult to process, and it is necessary to use a special cutting machine to process the groove. Duplication can be prevented, and unauthorized unlocking of the horseshoe lock 2 can be prevented. Since the key pile does not protrude from the outer shape of the key plate 52, the insertion and removal of the key 4 is smooth and the concave groove 56 is formed asymmetrically, so the shape of the side wall 58 formed by the concave groove 56 is doubled. It is possible to increase the key count. Furthermore, since the concave grooves 56 provided on both side surfaces have the same shape, they can be used regardless of whether they are front or back.

  Then, a plate-like cover 48 capable of releasing and closing the key insertion hole of the inner cylinder 36 is provided, and this cover 48 is supported by the cover spring 50 at a position where the key insertion hole is closed in the cover support portion 36e. I have to.

  For this reason, since the key insertion hole is blocked by the cover 48, it is possible to prevent water or dust from entering the key hole when the key 4 is not inserted, and the horseshoe lock 2 can be used outdoors. Is also suitable. Also, it is convenient because the key 4 can be inserted into the cylinder lock 20 by sliding the cover 48 by inserting the key by applying the tip of the key 4 to the cover 48. Furthermore, a mechanism for closing the key insertion hole at low cost is realized by using a cover 48 of a plate piece and a cover spring 50 which is a coil spring.

  Further, a cap 46 provided with a guide 46c for inserting the key 4 is fitted to one end of the inner cylinder 36, and a chamfer 48b is formed on the cover 48 in accordance with the guide 46c. Then, the key 4 can be inserted into the cylinder lock by sliding the cover 48 to a position where the cover 48 is released more easily by inserting the key 4 with the tip of the key 4 against the chamfer 48b.

  Further, the tumbler insertion holes 36a are alternately drilled from both side surfaces of the side wall of the inner cylinder 36, and the tumblers 22 to 32 are alternately inserted into the inner cylinder 36 from both side surfaces. Even if it inserts from the right side and the case where it inserts from the left side, the position of the 2nd convex parts 22e-32e engaged with the key 4 differs. For this reason, the number of counts can be doubled with the same number of tumblers, and the crime prevention effect can be further enhanced.

Further, the spring insertion portion 36c formed at one end of the tumbler insertion hole 36a needs to be wider than the other portions, but since the insertion portions of the tumbler spring 40 are alternately provided on both side surfaces, each tumbler insertion The space | interval of the hole 36a can be narrowed and the length of the inner cylinder 36 is comprised shorter. For this reason, the entire length of the cylinder lock 20 can be shortened, and the length of the key 4 is also shortened. Therefore, the cylinder lock 20 can be incorporated into a small case 6 and the processing cost of the cylinder lock 20 and the key 4 itself can be reduced. Can be suppressed.
[Second Embodiment]
Next, a second embodiment will be described. FIG. 5 is a perspective view showing the appearance of the shackle lock 72 and the key 74 of the second embodiment, and FIG. 6 shows the internal configuration of the cylinder lock 80 attached to the shackle lock 72 of the second embodiment and the key 74. It is an exploded view which shows a shape.

  The locking device 71 according to the second embodiment includes a shackle lock 72 and a key 74 for unlocking the shackle lock 72. As shown in FIG. 5, the shackle lock 72 has a U-shaped structure in which both ends are inserted into a cylindrical case 76 and two insertion portions 76 a provided in the case 76 to form a loop body together with the case 76. And a cylinder lock 80 that disables removal of the end portion in a state where the end portion of the locking rod 78 is inserted into the case 76.

  Incidentally, the internal structure of the shackle lock 72 of the second embodiment is disclosed in Japanese Patent No. 3554370 and the like, in addition to the above components, is pivotally supported in the case 76 and is rotatable. An elongated cylindrical shaft member (not shown) that engages an engaged portion provided at the end of the locking rod 78 is connected to the cylinder lock 80, and engages with the shaft member to rotate the shaft member. For example, a connecting member (not shown) is provided.

  On the other hand, as shown in FIG. 6, the key 74 includes a knob 114 made of synthetic resin and a long key plate 102 having a length substantially equal to the inner cylinder 96 of the cylinder lock 80. The key plate 102 has a tip portion 110 formed in a tapered shape so as to be easily inserted into the cylinder lock 80. Further, a recess 106 is formed along the side edge of the key plate 102 on the plate surface 104 of the key plate 102. The recess 106 is parallel to the insertion direction of the key 74 and passes through the center in the width direction. Is asymmetrical with respect to the center line. On the center line, a guide groove 112 is formed as a guide when the key 74 is inserted into the cylinder lock 80 with a certain width. The recess 106 and the guide groove 112 are formed so that both plate surfaces have the same shape when the plate surface 104 of the key plate 102 is viewed from above, and can be used regardless of the front and back sides. .

  As shown in FIG. 6, the cylinder lock 80 is formed with six tumblers 82 to 92 each having an insertion hole for inserting a key in the center portion, and a notch for inserting the key in the center portion. A stopper tumbler 94, an inner cylinder 96 having a tumbler insertion hole for inserting the tumblers 82 to 92 and the stopper tumbler 94, and a hollow portion for rotatably supporting the inner cylinder 96, An outer cylinder 98 in which grooves for engaging the tumblers 82 to 92 and the stopper tumbler 94 are formed on the inner peripheral surface of the hollow portion, and the tumblers 82 to 92 and the stopper tumbler 94 are inserted into the respective tumbler insertion holes, respectively. The tumblers 82 to 92 and the stopper tumbler 94 face outward so that the tumblers 82 to 92 and the stopper tumbler 94 engage with a groove formed on the inner peripheral surface of the outer cylinder 98. A plurality of tumbler springs (not shown) each biasing, a side bar (not shown) capable of reciprocating in the radial direction between the outer cylinder 98 and the inner cylinder 96, and an outward biasing force on the side bar And a sidebar spring (not shown) to be actuated.

  The cylinder lock 80 of the second embodiment is obtained by removing the cover 48 for closing the key insertion hole and related parts from the cylinder lock 20 of the first embodiment. Since the configuration of the parts is substantially the same as the cylinder lock 20 of the first embodiment, only the differences will be described below.

  The inner cylinder 96 is formed in a cylindrical shape, and has a key insertion hole formed in a shape and size that matches the outer shape of the key plate 102 of the key 74 from one end side of the cylinder toward the other end. A protrusion that engages with the guide groove 112 when the key 74 is inserted is formed in the insertion hole. And the protrusion 96b connected with the shaft member engaged with the to-be-engaged part formed in the latching rod 78 via a connection member is protrudingly provided in two places by the edge part on the opposite side of this cylinder. Yes. A tumbler insertion hole for inserting the tumblers 82 to 92 and the stopper tumbler 94 is formed at regular intervals in the length direction from the side wall of the cylinder to the inner region including the key insertion hole, and one end of each tumbler insertion hole. The tumblers 82 to 92 and the stopper tumbler 94 are urged outwardly, and spring insertion portions into which tumbler springs that press the grooves formed on the inner peripheral surface of the outer cylinder 98 are inserted alternately on both side surfaces. Is formed. Further, a rectangular side bar support hole for supporting the side bar is formed on the side wall of the inner cylinder 96, and a leg insertion groove into which a part of the side bar can be inserted is formed at the bottom of the side bar support hole. It is formed and penetrates the key insertion hole and the tumbler insertion hole.

Further, a flange 96a protruding in a flange shape is formed at the end on the side where the key is inserted, and is configured to come into contact with the end surface of the outer cylinder 98 during assembly.
In the second embodiment, the case 76 corresponds to the lock body of the present invention, the locking rod 78 corresponds to the connecting member of the present invention, the tumbler spring corresponds to the coil spring of the present invention, and the projection 96b. The shaft member and the connecting member correspond to the engaging portion of the present invention.

The method of assembling the cylinder lock 80 is the same as the method of assembling the cylinder lock 20 except for the assembly portion of the cover 48 and related parts, and is therefore omitted.
In the locking device 71 of the second embodiment configured as described above, both ends of the locking rod 78 of the shackle lock 72 are inserted into the insertion portions 76a provided in the case 76, and the locking rod 78, the case 76, When the loop body for locking is formed by the above, the cylinder lock 80 for engaging the engaged portion formed at the end portion of the locking rod 78 via a connecting part or the like and maintaining the loop shape is provided. I have. The key 74 inserted into the cylinder lock 80 has a recess 106 formed asymmetrically along the side edge of the key plate 102 on the plate surface 104 of the key plate 102, and the recess 106 extends from the upper side to the plate surface 104. It is formed to have the same shape when viewed. On the other hand, inside the key insertion holes of the tumblers 82 to 92 constituting the cylinder lock 80, when the key 74 is inserted, the tumblers 82 to 92 are aligned by engaging with the side wall 108 of the recess 106 of the key 74. The 2nd convex part for making it be provided is provided.

  The shackle lock 72 is configured such that the both ends of the locking rod 78 are inserted into the insertion portions 76 a provided in the case 76, whereby the engaged portion and the shaft member formed at the end of the locking rod 78. And the shaft member is rotated, and the inner cylinder 96 is rotated in the opposite direction to the timepiece with the shaft member via the projection 96b and the connecting part. And while the 1st convex part of the tumblers 82-92 and a tumbler engaging part engage, the engaging head of a side bar engages with the side bar engaging part of the outer cylinder 98, and the inner cylinder 96 Becomes non-rotatable and locked.

  On the other hand, in the locked shackle lock 72, when the key 74 is inserted into the key insertion hole of the cylinder lock 80, the second convex portions of the tumblers 82 to 92 engage with the side wall 108 of the recess 106 formed in the key plate 102. Thus, the tumblers 82 to 92 are accommodated in the inner cylinder 96, the engagement between the first convex portion and the tumbler engaging groove is released, and the engaging head of the side bar can be accommodated in the inner cylinder 96. The key 74 becomes rotatable. Then, by rotating the key 74 in the same direction as the timepiece, the protrusion 96b and the shaft member rotate in the same direction as the timepiece together with the inner cylinder 96, and the engaged portion formed at the end of the locking rod 78; The engagement with the shaft member is released, the locking rod 78 can be removed, and the unlocked state is achieved.

For this reason, also in the locking device 71 of the second embodiment, effects other than those related to the cover 48 among the effects obtained by the locking device 1 of the first embodiment can be obtained.
As mentioned above, although the Example of this invention was described, it cannot be overemphasized that this invention can take a various form.

  In this embodiment, the locking device is preferably configured as the horseshoe lock 2 or shackle lock 72 and the key used therefor, but any device may be used as long as it forms a loop shape with the lock body and the connecting member. It may be a lock and a key used for this.

  In this embodiment, the cylinder lock 20 is applied to the horseshoe lock 2 and the cylinder lock 80 is applied to the shackle lock 72. However, the cylinder lock 20 is not limited to this combination. May be used.

It is a perspective view which shows the external appearance of the horseshoe lock 2 and the key 4 of 1st Example. It is an exploded view which shows the internal structure of the cylinder lock 20 of 1st Example, and the shape of the key 4. FIG. FIG. 4 is an external view showing the shapes of the tumbler 22 and the stopper tumbler 34. FIG. 6 is an explanatory diagram illustrating a configuration of a cover 48. It is a perspective view which shows the external appearance of the shackle lock 72 and the key 74 of 2nd Example. It is an exploded view which shows the internal structure of the cylinder lock 80 of 2nd Example, and the shape of the key 74. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Locking device, 2 ... Horseshoe lock, 4 ... Key, 6 ... Case, 8 ... Kanuki, 10 ... Slit,
DESCRIPTION OF SYMBOLS 12 ... Lever, 20 ... Cylinder lock, 22-32 ... Tumbler, 22a-32a ... Key insertion hole, 22b-32b ... Spring support part, 22c-32c ... First convex part, 22d-32d ... Sidebar support groove, 22e 32e ... second convex part, 34 ... stopper tumbler, 34a ... notch, 36 ... inner cylinder, 36a ... tumbler insertion hole, 36b ... projection, 36c ... spring insertion part, 36d ... sidebar support hole, 36e ... cover support Hole, 36f ... Cover spring support groove, 36g ... Locking hole, 38 ... Outer cylinder, 38a ... Sidebar engaging portion, 38b ... Tumbler engaging groove, 38c ... Stopper tumbler engaging portion, 40 ... Tumbler spring, 40b ... Leg part 42 ... Side bar 42a ... Engagement head 42b ... Leg part 42c ... Support groove 44 ... Side bar spring 46 ... Cap 46 ... key insertion hole, 46b ... locking claw, 46c ... guide, 48 ... cover, 48a ... notch, 48b ... chamfer, 48c ... edge, 50 ... cover spring, 52 ... key plate, 54 ... plate surface, 56 ... concave Groove, 58 ... side wall, 60 ... tip, 62 ... knob, 71 ... locking device, 72 ... shackle lock, 74 ... key, 76 ... case, 76a ... insert, 78 ... locking rod, 80 ... cylinder lock, 82 ... 92 ... Tumbler, 94 ... Stopper tumbler, 96 ... Inner cylinder, 96a ... Hut, 96b ... Protrusion, 98 ... Outer cylinder, 102 ... Keyboard, 104 ... Plate surface, 106 ... Dimple, 108 ... Side wall, 110 ... Tip Part, 112 ... guide groove, 114 ... knob

Claims (8)

A part of the long connection member is inserted into the insertion hole, thereby providing a lock body that forms a loop body together with the connection member, and the engaged member formed on the connection member inside the lock body. A locking device provided with a cylinder lock for engaging the joint portion to hold the loop shape,
The cylinder lock is
A plurality of tumblers in which a first convex portion is formed on the outer peripheral edge and a key insertion hole is formed in a substantially central portion;
A key insertion hole formed in a columnar shape and drilled from one end side toward the other end of the column, and protruded at an end opposite to the key insertion hole of the column, and the engaged portion An inner cylinder having an engaging portion that can be engaged with the inner cylinder and a plurality of tumbler insertion holes that are drilled from the side wall of the column to an inner region including the key insertion hole, and for inserting the tumbler;
An outer cylinder having a hollow part for rotatably supporting the inner cylinder, and having a tumbler engaging groove engageable with the first convex part of the tumbler on an inner peripheral surface of the hollow part;
A plurality of coil springs that are inserted into the respective tumbler insertion holes together with the respective tumblers, and that bias the respective tumblers outwardly so that the first convex portions engage with tumbler engaging grooves of the outer cylinder,
When the key is inserted into the key insertion hole, the engagement between the first convex portion and the tumbler engagement groove is released, and the inner cylinder can be rotated, and the key rotates in this state. As a result, the inner cylinder rotates, the engagement between the engaging portion of the inner cylinder and the engaged portion of the connecting member is released, and a part of the connecting member is removed from the insertion hole of the lock body. Configured to be removable,
The key is
It consists of a flat key plate and a knob, and is formed on both plate surfaces of the key plate so that the recesses have the same shape when viewed from above the plate surface along the key insertion direction,
In addition, the hole edge of the key insertion hole of the tumbler is formed with a second convex part that engages with the concave part of the key when the key is inserted and aligns the tumbler. Locking device to do.   The locking device according to claim 1, wherein the recess formed in the key plate is a recess formed so that the groove width continuously changes.   The locking device according to claim 1, wherein the recess formed in the key plate is a depression formed along a side edge.  The said cylinder lock is provided with the cover which can open | release and close the key insertion hole of the said inner cylinder, The locking device of Claim 1 characterized by the above-mentioned. The cover is plate-shaped,
The inner cylinder of the cylinder lock is formed with a cover support portion which is a recess for slidably supporting the cover on a key insertion surface which is an end surface on the side where a key is inserted,
The locking device according to claim 4, wherein the cylinder lock includes a biasing member that biases the cover in one direction and supports the cover at a position where the key insertion hole is closed. The cylinder lock is provided with a cap formed so that a key insertion hole is formed in a substantially central portion and can be fitted to an end portion on the key insertion surface side of the inner cylinder,
The cover is chamfered on the end on the cap side of the surface facing the end surface supported by the biasing member,
The locking according to claim 5, wherein a guide for guiding the tip of the key to the chamfer of the cover is provided on a side corresponding to the chamfered side of the cover of the key insertion hole of the cap. apparatus.   The locking device according to claim 6, wherein the tumbler insertion holes are alternately drilled from both side surfaces of the side wall of the inner cylinder, and the tumblers are alternately inserted into the inner cylinder from both side surfaces. .   The locking device according to claim 7, wherein the concave portion of the key is asymmetric with a line parallel to the insertion direction of the key and passing through the midpoint of the side in the width direction as a center line.

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