JP2006207211A - Cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylinder lock excellent in theft prevention efficiency without being illegally unlocked by a punch. <P>SOLUTION: In the cylinder lock 1 equipped with a holder 2 having an engaging groove on the inner circumferential surface, a tumbler 25 projected from the outer circumference, a cylinder 3 making the tumbler 25 impossible to rotate in the holder 2 engaged with the engaging groove 12 of the holder 2 in the case of a key is drawn out and an output member 4 outputting the rotation of the cylinder 3 provided to the rear end side of the cylinder 3 to the outside, the cylinder 3 is separated to the rear end 30 providing a body 20 and the output member 4 thereto, and it is so characterized in that the body 20 and the rear end 30 can be interconnected with connecting means 28 and 31 releasing the connection of the body 20 and the rear end 30 when the rear end 30 is drawn out of the holder 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cylinder lock used for a door of a vehicle or a building.

  A cylinder lock widely used for automobiles, building doors, and the like generally includes a holder and a cylinder provided in the holder. The cylinder can be rotated in the holder by inserting a correct key (regular key). When no key is inserted into the cylinder, or when another key (non-conforming key) or tool is inserted, the tumbler protruding from this cylinder engages with the engagement receiving part formed on the inner peripheral surface of the holder. Thus, the cylinder cannot be rotated. A key lever is connected to the rear end of the cylinder, and a door lock device or the like is driven via a rod connected to the key lever.

Japanese Patent Laid-Open No. 9-296637

  However, in the conventional cylinder lock, for the purpose of theft, a cylinder or a holder is broken by a so-called punching action in which a tool such as a flat-blade screwdriver is inserted into the cylinder from the front side and hammered with a hammer or the like, and the cylinder comes out of the holder. As a result, the rotation of the cylinder is allowed and the door lock state may be unexpectedly released. As a result, there was a problem that it was easy to be stolen. An object of this invention is to provide the cylinder lock excellent in antitheft property in view of the said problem.

  In order to achieve the above object, the present invention includes a cylinder lock including a holder having an engagement groove on the inner peripheral surface and a tumbler protruding from the outer periphery, and the tumbler is inserted into the engagement groove of the holder when the key is removed. In a cylinder lock comprising: a cylinder that engages and cannot rotate within the holder; and an output member that is provided on the rear end side of the cylinder and outputs the rotation of the cylinder to the outside. The main body portion and the rear end portion are separated from the main body portion and the rear end portion when the rear end portion is pulled out from the holder. It is comprised so that it may be connected by the connection means to cancel | release connection with a part.

  According to the above configuration, even if the cylinder or the holder is destroyed by the driving of a driver or the like for the purpose of theft, and the cylinder comes out of the holder and becomes rotatable, the connection between the main body portion and the rear end portion of the cylinder is possible. Therefore, unauthorized unlocking by rotating the body portion of the destroyed cylinder can be prevented.

  Further, the connection holding of the connection means may be performed by restricting the movement of the rear end portion to the connection release side when the holder stores the rear end portion of the cylinder.

  According to the above-described configuration, since the holder holds the rear end portion by connecting and holding the main body portion and the rear end portion of the cylinder, separately connecting and holding the main body portion and the rear end portion. The member for performing is unnecessary, and it becomes possible to manufacture at low cost without increasing the number of parts.

  Furthermore, the connection means is released from its weight by a combined weight of at least the rear end portion, the output member, and the transmission member connected to the output member in a state where the connection holding by the holder is released. It may be.

  According to the above configuration, since the engagement is released by its own weight, the manufacturing cost can be further reduced without increasing the number of parts.

  Furthermore, the connection means may be disconnected by a biasing force of a biasing member provided between the main body portion and the rear end portion.

  According to the above configuration, since the connection is released by the urging force of the urging member, the connection between the main body portion and the rear end portion of the cylinder can be more reliably released.

  As described above, according to the cylinder lock of the present invention, unauthorized unlocking by punching can be prevented with a simple configuration, and the anti-theft performance is improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a partial cross-sectional side view of the cylinder lock of the first embodiment. In FIG. 1 (the same applies to FIGS. 2, 3, 4, 5 (a)), the left side, which is the key insertion side, is “front”, and the right side is “rear”.

  The cylinder lock 1 is roughly a holder 2 attached to an outer plate (not shown) of the door body or a recess (not shown) formed in an outer handle provided on the outer plate, and is rotatable in the holder 2. It is comprised from the cylinder 3 accommodated and the output member 4 attached to the rear-end part of the cylinder 3. As shown in FIG.

  The holder 2 can be obtained by molding a metal material such as zinc die casting into a substantially cylindrical shape. A fixing collar 10 having a screw hole (not shown) is provided on the outer peripheral portion of the holder 2 and is fixed to the door body by screwing or the like. A step portion 11 is formed by slightly increasing the outer diameter on the front end side of the inner peripheral portion of the holder 2, and a pair of engagements along the axial direction are provided at symmetrical positions on the inner peripheral portion of the holder 2. A groove 12 is formed. The engagement groove 12 is configured to prevent the cylinder 3 from rotating when a tumbler 25 described later is engaged, and has a predetermined width further to the rear side than the last tumbler 25a located on the cylinder rear end side. Only extended and formed. Furthermore, a locking wall 13 is formed on the inner peripheral portion on the rear end side of the holder 2 so as to protrude radially inward, leaving a central hole through which the rear end portion of the cylinder 3 passes. A holder cap 14 is put on the front end of the holder 2.

  The cylinder 3 has a substantially cylindrical shape, and is formed of a metal material such as zinc die-casting. The cylinder main body portion 20 (main body portion) located on the front side and the cylinder rear end portion 30 (rear end portion) located on the rear side are formed. The cylinder body 20 and the cylinder rear end 30 are detachably connected.

  A large-diameter portion 21 is provided at the front end portion of the cylinder body portion 20, and the large-diameter portion 21 is engaged with the step portion 11 of the holder 2 to move the cylinder body portion 20 to the rear side. Blocking. A key hole 22 for inserting a key is formed in the front end surface of the cylinder body 20. The key hole 22 is formed in the cylinder body 20 so as to extend in the front-rear direction (that is, in the axial direction).

  A plurality of tumbler grooves 24 are formed in the cylinder body 20 so as to be aligned in the front-rear direction and orthogonal to the key holes 22. In the tumbler groove 24, plate-like tumblers 25 (eight in this embodiment) are respectively stored. The tumbler 25 is biased by a spring (not shown) in a direction protruding from the outer peripheral surface of the cylinder main body 20 and protrudes on both sides from the outer peripheral surface of the cylinder main body 20 when the key is not inserted. It is designed to be retracted and housed inside the portion 20.

  A storage hole 26 formed so as to cross the key hole 22 is provided immediately behind the large-diameter portion 21, and a high hardness safety plate 27 is disposed in the storage hole 26. A key insertion hole (not shown) that communicates with the key hole 22 is provided at the center of the safety plate 27. The safety plate 27 prevents a cylinder 3 from being pulled out by preventing a slide hammer drill (not shown) from being screwed into the key hole 22 for the purpose of theft. Furthermore, a connecting recess 28 having a rectangular cross section is formed on the rear end surface of the cylinder body 20.

  On the other hand, on the cylinder rear end portion 30 side, it is formed by reducing the outer diameter from the front side in FIG. 1 and the connecting convex portion 31 protruding in the axial direction from the front end surface and fitting into the connecting concave portion 28. A stepped portion 32 and a mounting portion 33 for mounting and fixing the output member 4 are provided.

  The mounting portion 33 is mounted with a lever-like output member 4 so that it cannot be removed by an E-ring 34 fitted on the rear side of the mounting portion 33. The output member 4 is non-rotatably attached to the cylinder rear end portion 30, and the rotation of the cylinder body portion 20 is transmitted to the cylinder rear end portion 30 via the connecting convex portion 31, and further the cylinder rear end It is transmitted to the output member 4 that rotates together with the portion 30. At the end of the output member 4, a rod holder 41 that holds one end of the rod 6, which is a transmission member for transmitting the rotation of the output member 4 to a door lock device (not shown), is attached to the output member 4. It is fixed so that it can rotate.

  Thus, in this embodiment, a connection means is comprised by the connection recessed part 28 and the connection convex part 31. FIG.

  Assembling the cylinder lock 1 having the above-described configuration includes assembling the cylinder rear end 30 to which the output member 4 is not attached from the front opening of the holder 2 and the cylinder main body 20 to which the components necessary for the assembly such as the tumbler 25 are assembled. Insert in order. The cylinder body 20 and the rear end 30 are housed in the holder 2 by caulking and fixing the holder cap 14 to the front end of the holder 2. Finally, assembly of the cylinder lock 1 is completed by assembling the output member 4 to the cylinder rear end 30 and mounting the E-ring 34.

  In the assembled cylinder lock 1, the connecting convex portion 31 of the cylinder rear end portion 30 is fitted in the connecting concave portion 28 of the cylinder body 20. The cylinder body 20 is prevented from moving forward by the holder cap 14, and the cylinder rear end 30 is prevented from moving backward by the locking wall 13 of the holder 2. The connection between the 20 connection recesses 28 and the connection protrusion 31 of the cylinder rear end 30 is not released.

Next, the operation of the cylinder lock 1 having the above configuration will be described.
When a regular key (not shown) is inserted into the key hole 22 of the cylinder 3, the engagement of the tumbler 25 with the engagement groove 12 of the holder 2 is released by retracting the tumbler 25 into the cylinder 3. As a result, the cylinder 3 can be rotated in the holder 2. When the user turns the regular key to rotate the cylinder body 20, the rotation of the cylinder body 20 is transmitted to the cylinder rear end 30 via the connecting projection 31 and is fixed to the rear end 30. The output member 4 rotates.

  On the other hand, when the non-conforming key is inserted into the key hole 22 of the cylinder 3, the tumbler 25 does not completely enter the cylinder 3, but remains protruding from the outer peripheral surface of the cylinder 3, so 12 is engaged. Therefore, the cylinder 3 cannot be rotated in the holder 2 and the output member 4 cannot be rotated.

  By the way, in a general cylinder lock, for the purpose of theft, etc., a tool such as a flathead screwdriver is inserted into the keyhole of the cylinder from the front side and struck with a hammer or the like to destroy the cylinder and the holder, and the cylinder is pulled out of the holder Accordingly, there is a case where an unauthorized unlocking action is performed by punching in which the cylinder that can be rotated is illegally rotated.

  However, in the cylinder lock 1 configured as described above, even when a tool such as a flat-blade screwdriver is inserted into the key hole 22 of the cylinder 3 from the front side and struck by a hammer or the like, the large diameter portion 21 and the stepped portion 32 of the cylinder 3 are respectively Since it is locked to the step portion 11 and the locking wall 13 of the holder 2, the cylinder 3 cannot be easily moved out of the holder 2.

  Still, as shown in FIG. 2, the cylinder main body 20 and the locking wall 13 of the holder 2 may be destroyed by the impact, and the cylinder 3 may be moved rearward. However, in the cylinder lock 1 having the above-described configuration, when the locking wall 13 of the holder 2 is broken, the connection between the connecting concave portion 28 of the cylinder body 20 and the connecting convex portion 31 of the cylinder rear end 30 is maintained. Therefore, the cylinder rear end 30 comes out of the holder 2 due to the impact of hitting, and the cylinder rear end 30 falls off due to its own weight. As a result, the connection between the cylinder body 20 and the cylinder rear end 30 is released. As a result, even if the cylinder body 20 is rotated, the rod 6 connected to the dropped output member 4 is operated. Cannot be unlocked.

  Note that the engagement state between the coupling recess 28 of the cylinder body 20 and the coupling projection 31 of the cylinder rear end 30 is at least the cylinder rear end 30, the output member 4, and the rod 6 coupled to the output member 4. It is sufficient if there is a gap to the extent that the cylinder rear end 30 can be removed by its own weight. Moreover, in this Embodiment, although it connects with the one connection convex part 31 and the connection recessed part 28, it is not limited to this, For example, the connection convex part 31 and the connection recessed part 28 are provided with two or more, respectively. At the same time, by reducing the axial depth of the connection recess 28, the connection strength can be maintained and the cylinder rear end 30 can be more easily detached from the cylinder body 20. Furthermore, it goes without saying that a connecting convex portion may be formed on the cylinder body 20 side and a connecting concave portion on the cylinder rear end portion 30 side.

  As described above, according to the cylinder lock 1 of the present embodiment, the cylinder 3 or the holder 2 is destroyed by hitting a driver or the like for the purpose of theft, and the cylinder 3 comes out of the holder 2 and is rotatable. Even if it becomes, since connection with the cylinder main-body part 20 and the cylinder rear-end part 30 is cancelled | released, the unauthorized unlocking by rotating the destroyed cylinder main-body part 20 can be prevented.

  In addition, since the holder 2 stores the cylinder rear end 30 by connecting and holding the cylinder main body 20 and the cylinder rear end 30, the connection between the main body 20 and the rear end 30 is performed separately. A member for holding is not necessary, and it can be manufactured at low cost without increasing the number of parts.

  Furthermore, since the engagement is released by the dead weight of the cylinder rear end portion 30, the manufacturing cost can be further reduced without increasing the number of parts.

  FIG. 3 shows a cylinder lock 1 according to the second embodiment of the present invention. The present embodiment differs from the first embodiment in the connecting means and connecting and holding means between the cylinder body 20 and the cylinder rear end 30. Hereinafter, the same functional parts as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the present embodiment, as shown in FIG. 5, a connecting groove 51 is formed on the rear end side of the cylinder body 20 from the outer peripheral surface to the center position of the cylinder body 20 in the radial direction. Is provided. And the side wall 51a of the front side of this connection groove | channel 51 is formed so that it may incline a little to the front side. An insertion hole 52 that communicates with the coupling groove 51 is formed on the rear end surface of the cylinder body 20, and an end on one side in the radial direction is open. The connecting groove 51 and the insertion hole 52 are set and provided so that the opening side is on the lower side when the cylinder lock 1 is in the locked state.

  On the other hand, at the front end of the cylinder rear end portion 30, a semi-disc-shaped engagement portion 61 that fits into the connection groove 51, the engagement portion 61 is connected to the cylinder rear end portion 30 body, and the insertion hole 52 is inserted. The connecting part 62 is provided. The engaging portion 61 is formed such that the outer peripheral surface thereof is flush with the outer peripheral surface of the cylinder main body portion 20 in a state where the engaging portion 61 is fitted in the coupling groove 51 of the cylinder main body portion 20.

  Further, as shown in FIG. 3, the length of the engagement groove 12 of the holder 2 is formed by extending by A width further rearward than the last tumbler 25a located on the cylinder rear end side. The width A is set to be the same as the moving distance of the cylinder main body 20 and the rear end 30 with respect to the holder 2 necessary for releasing the connection between the cylinder main body 20 and the cylinder rear end 30. ing. In the present embodiment, the locking wall 13 at the rear end of the holder 2 of the first embodiment is not provided.

  The cylinder body 20 and the cylinder rear end 30 having the above-described configuration are assembled in the connecting groove 51 and the insertion hole 52 of the cylinder main body 20, and the engaging part 61 and the connection part 62 of the cylinder rear end 30 are respectively in the radial direction. It is done by inserting more. In the assembled state shown in FIG. 3, the engaging portion 61 and the connecting portion 62 of the cylinder rear end portion 30 are engaged with the connecting groove 51 and the insertion hole 52 of the cylinder body portion 20, respectively. And are connected so as to rotate together. Further, the inner peripheral wall of the holder 2 prevents movement of the cylinder rear end portion 30 in the radial direction, that is, the direction in which the connection between the cylinder main body portion 20 and the cylinder rear end portion 30 is released. It plays a role to hold.

  As described above, in the present embodiment, the connecting groove 51 and the insertion hole 52 of the cylinder body 20 and the engaging portion 61 and the connecting portion 62 of the cylinder rear end 30 constitute a connecting means.

  In the cylinder lock 1 of the present embodiment, when the cylinder main body 20 is destroyed by the punching action as shown in FIG. 4, the cylinder main body 20 and the rear end 30 are attached to the holder 2 by the impact of the strike. Move backward by A width. Then, the cylinder rear end part 30 moves to the outside of the holder 2, and the movement restriction in the radial direction of the cylinder rear end part 30 is released. As a result, the cylinder rear end portion 30 drops downward due to the weight of the cylinder rear end portion 30, and the connection between the cylinder main body portion 20 and the cylinder rear end portion 30 is released. As a result, even if the cylinder body 20 is turned, the rod 6 connected to the dropped output member 4 cannot be operated, and unauthorized unlocking cannot be performed.

  At this time, since the length of the engagement groove 12 of the holder 2 is formed by extending the rear side of the rear tumbler 25a by A width, the cylinder body 20 and the rear end 30 are securely connected. The cylinder body 20 and the rear end 30 can be reliably released from each other.

  Note that the engagement state between the coupling groove 51 and the insertion hole 52 of the cylinder body 20 and the engagement portion 61 and the coupling portion 62 of the cylinder rear end 30 is at least the cylinder rear end 30, the output member 4, and the output. It is sufficient if there is a gap to the extent that the cylinder rear end 30 can be removed by its own weight combined with the rod 6 connected to the member 4. In the present embodiment, since the front side wall 51a of the connecting groove 51 is formed to be slightly inclined forward, the engaging portion from the connecting groove 51 of the cylinder body 20 to the cylinder rear end 30 is provided. 61 becomes easy to come off.

  In the present embodiment, the cylinder body 20 and the cylinder rear end 30 are also connected in the front-rear direction in the assembled state shown in FIG. 3, and therefore the theft of pulling the cylinder body 20 forward. It also has anti-theft properties for the trick. Specifically, even if the cap is broken and the cylinder body 20 is pulled out, the output member 4 fixed to the cylinder rear end 30 is locked to the rear end of the holder 2 and the front side of the cylinder body 20 Therefore, it is possible to prevent the cylinder body 20 from being pulled out forward and being unlocked illegally.

  As described above, according to the cylinder lock 1 of the present embodiment, the same effect as that of the first embodiment is provided, the punching action is performed, and the cylinder 3 is detached from the holder 2 and can be rotated. Even if it becomes, since connection with the cylinder main-body part 20 and the cylinder rear-end part 30 is cancelled | released, the unauthorized unlocking by rotating the destroyed cylinder main-body part 20 can be prevented by simple structure.

  FIG. 6 shows a modification of the cylinder lock 1 according to the second embodiment of the present invention. In this modification, as shown in FIG. 6, a spring housing portion 55 for mounting a spring 54 is provided in the coupling groove 51 of the cylinder body portion 20 of the second embodiment, and the cylinder body portion 20 and the cylinder rear end portion 30 are arranged. A spring 54 is provided between the engaging portion 61 and the engaging portion 61. If comprised in this way, the urging | biasing force of the spring 54 can urge | bias the cylinder rear end part 30 to the radial direction, ie, the direction from which the connection of the cylinder main-body part 20 and the cylinder rear end part 30 is cancelled | released, When the cylinder rear end 30 is moved out of the holder 2 by the unauthorized means described above, the connection between the cylinder body 20 and the cylinder rear end 30 can be reliably released.

  It should be noted that the engagement state between the connecting groove 51 and the insertion hole 52 of the cylinder body 20 and the engaging portion 61 and the connecting portion 62 of the cylinder rear end 30 is determined by at least the biasing force of the spring 54. It is sufficient if there is a gap to the extent that can be removed.

  As described above, according to the cylinder lock 1 of the present modified example, since the connection is released by the biasing force of the spring 54 that is the biasing member, the cylinder body 20 and the cylinder rear end are more reliably connected. The connection with the unit 30 can be released.

  Note that the cylinder lock of the present invention is not limited to the above-described embodiments. For example, a tumbler such as that disclosed in Patent Document 1 can be used for a pin-type cylinder lock. In that case, the pin hole engaged with the pin corresponds to the engagement groove of the present invention.

The partial cross section side view of the cylinder lock of 1st Embodiment. The partial cross section side view which shows the state where the cylinder of FIG. 1 was destroyed. The partial cross section side view of the cylinder lock of 2nd Embodiment. The partial cross section side view which shows the state by which the cylinder of FIG. 2 was destroyed. (A) is a side view which shows a part of cylinder of 2nd Embodiment, (b) is the BB sectional drawing of (a). Sectional drawing of the cylinder which shows the modification of 2nd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Cylinder lock, 2 ... Holder, 3 ... Cylinder, 4 ... Output member, 12 ... Engagement groove, 20 ... Main-body part, 25 ... Tumbler, 30 ... Rear-end part, 28, 31 (51, 52, 61, 62) ) ... Connecting means.

Claims (4)

  A holder having an engagement groove on the inner peripheral surface and a tumbler protruding from the outer periphery, and when the key is removed, the tumbler engages with the engagement groove of the holder and cannot be rotated in the holder. In a cylinder lock comprising a cylinder and an output member provided on the rear end side of the cylinder and outputting the rotation of the cylinder to the outside, the cylinder includes a body portion and a rear end portion provided with the output member. The main body portion and the rear end portion are connected to each other by connecting means for releasing the connection between the main body portion and the rear end portion when the rear end portion comes out of the holder. Cylinder lock characterized by that.   The connection holding of the connecting means is performed by restricting the movement of the rear end portion to the connection release side by storing the rear end portion of the cylinder by the holder. Cylinder lock.   The connection means is configured such that the connection is released by its own weight including at least the rear end portion, the output member, and the transmission member connected to the output member in a state in which the connection holding by the holder is released. The cylinder lock according to claim 2.   3. The cylinder lock according to claim 2, wherein the coupling means is configured to release the coupling by a biasing force of a biasing member provided between the main body portion and the rear end portion.

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