JP2009127262A - Crime preventive structure of tumbler lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To apply a rotation preventing mechanism for an inner cylinder body having a thermoplastic member, to be fully useful for a tumbler lock having a movable obstacle piece such as a drive pin or a disk tumbler. <P>SOLUTION: This crime preventive structure of the tumbler lock is constituted by forming a support hole radially at the rear end of an outer cylinder body, and fitting a thermoplastic regulating member with a lock pin integrally located on the inner peripheral surface, fixedly into the support hole, while forming an engaging hole for the lock pin on the rear end side of the inner cylinder body or on the inner end side of a tail piece. When the tumbler lock is heat-attacked by a fusion-cutting means from the front face, the thermoplastic regulating member is fused to release the regulation of the thermoplastic regulating member, and the lock pin falls by its own weight to engage its lower end into the engaging hole. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a crime prevention structure for a tumbler lock having a locking / unlocking mechanism mainly including a movable obstacle (including a locking bar) such as a pin tumbler and a disk tumbler.

  Patent Document 1 discloses a locking / unlocking mechanism including a disk tumbler that is axially aligned in an inner cylinder that is fitted into the outer cylinder, and a locking bar that is engaged and disengaged in an axial engagement recess of the outer cylinder. An example of a tumbler tablet provided is disclosed.

  That is, the tumbler lock described in Patent Document 1 is “the outer cylinder 31, the grooves 33 formed in both ends that are parallel to the axial direction of the outer cylinder 31 and are opposed to each other in the diameter direction, and the outer cylinder 31. An inner cylinder 41 that is rotatably inserted into the inner cylinder 41, and a pair of locking members that protrude from the inner cylinder 41 so as to advance and retreat in the diametrical direction and prevent the rotation of the inner cylinder 41 with the protruding tip 47a engaged with the groove 33. A bar 47 and a key insertion hole 57 in the center, and are movable in the direction perpendicular to the axis of the inner cylinder 41 in a direction perpendicular to the respective locking bars 47 and in the axis direction of the inner cylinder 41 A plurality of recesses 69 that are aligned and have a pair of recesses 69 that allow the proximal end 47b of the locking bar 47 to enter at a specific movement position in the direction perpendicular to the axis and retract the locking bar 47 inward in the diameter direction of the inner cylinder 41. No tumbler 53 The insertion portion 79 has a rod-like insertion portion 79 having a substantially octagonal cross section that enters the key insertion hole 57 of the tumbler 53 and moves each of the tumblers 53 to the specific movement position. The key 77 is provided with the reference numeral (reference numeral 1).

  The tumbler lock described in Patent Document 1 is a tumbler in which a tumbler 53 is engaged in a two-divided manner on the same vertical plane, and a plurality of tumblers are aligned in the inner cylinder through a partition plate in the axial direction. Separately from this, there is a characteristic part in that there is a locking bar (here, a constituent member of a movable obstacle) that engages and disengages in an engagement recess in the axial direction of the outer cylinder.

  Patent Document 2 discloses an example of a tumbler lock provided with a locking / unlocking mechanism including a disk tumbler aligned in the axial direction in an inner cylinder that is fitted into the outer cylinder.

  That is, the tumbler lock described in Patent Document 2 is “the inner cylinder 1 in which the keyhole 3 is formed along the central axis, and the inner cylinder 1 is fitted to the inner peripheral surface thereof (of the outer cylinder). A pair of locking locking grooves 7 along the generatrix (symmetrical to the outer cylinder) and symmetrical about the central axis, and a pair of unlocking locking grooves 8 formed at different angular positions from the locking locking grooves. In which the both ends of the disk tumbler 4 corresponding to each key groove of the key when the key is inserted into the key hole 3 are aligned with the shear line 9. “A configuration in which a recessed portion 11 into which one end of the disk tumbler can be engaged is formed in a movement trajectory from the locking angle position to the unlocking angle position of one end of the disk tumbler 4 (reference numeral is that of Patent Document 2)”.

  In each tumbler lock described in Patent Document 1 and Patent Document 2, whether the disk tumbler 4 is divided into two parts (Patent Document 1) or one sheet (Patent Document 2), a locking bar that rotates together with the inner cylinder is provided. Although there is a difference in configuration such as whether it exists (Patent Document 1) or not (Patent Document 2), the outer cylinder is basically similar to a pin-type cylinder lock that is generally used. Body, an inner cylinder that is rotatably inserted in the outer cylinder, and an inner cylinder that moves in the radial direction and aligns with the shear line when the key is inserted, and is axially connected to the inner cylinder. A plurality of movable obstacles (drive pins, etc. for pin-type cylinder locks, disc tumblers including a locking bar for pin tumbler locks) that are aligned with each other, and when these movable obstacles are aligned with the shear line, Inner end side to the rear end of the outer cylinder to the cylindrical body and cooperating rotation and a tailpiece incorporated into rotatable.

  Incidentally, FIG. 1 of Patent Document 3 describes a first embodiment of a rotation blocking mechanism for an inner cylinder. The inner case 2 of Patent Document 3 is a member corresponding to the inner cylinder inserted into the outer cylinder (outer case) 5. When the lock is attacked by the fusing means, the inner case 2 is used for the inner cylinder. A rotation prevention mechanism for preventing rotation is attached to the bottom portion of the rear end portion of the outer cylindrical body 5 via a support member 10.

  Specifically, in paragraphs 0020 to 0023 of Patent Document 3, “… the handle of the thief attached to the vending machine or the like, the flame of the gas burner is placed around the cylinder lock 3. When sprayed, heat from the gas burner is transferred to the entire handle lock 1, and the L-shaped thermoplastic trigger member 8 constituting the rotation prevention mechanism mounted in a protruding state on the bottom portion of the rear end portion of the outer cylinder is formed. The one end portion 8a is melted, whereby the locked state with the locking portion 5b at the bottom portion of the outer cylindrical body (outer case) 5 is canceled, and the coil spring in the support member 10 fixed to the outer cylindrical body in a protruding state. 11 indicates that the trigger member 8 moves rearward until the trigger member 8 comes into contact with the restricting plate 10b, and the lock pin 9 protrudes further rearward from the through hole 10e.

  In the rotation preventing mechanism of the first embodiment of Patent Document 3, when the thermoplastic trigger member 8 is melted by heating of the fusing means, the lock pin 9 is moved in the engaging direction by the spring force of the coil spring 11 in the support member 10. It is possible to prevent the rotation of the cam member 12 that is displaced and positioned on the back side of the outer cylinder (outer case) 5 and fixed to the inner cylinder (inner case) 2.

  FIG. 6 of Patent Document 3 describes a second embodiment of the rotation blocking mechanism for the inner cylinder. The rotation preventing mechanism of the second embodiment includes a thermoplastic member 15 filled in a recess 2a formed in the bottom portion of the rear end portion of the inner case 2, and the handle case 5 in the locked state. When the tip 16a comes into contact with the thermoplastic member 15 of the recess 2a and the thermoplastic member 15 is melted, the lock pin 16 into which the tip 16a falls into the recess 2a, and the lock pin 16 is fixed to the end by fixing means. The elastic member 17 is attached to the bottom portion of the rear end portion of the outer cylindrical body (outer case) 5 so as to be fixedly supported and always urged toward the concave portion 2a.

  Similarly to the rotation preventing mechanism of the second embodiment, when the periphery of the cylinder lock 3 is melted by the fusing means, heat is transferred to the inner case 2 and the thermoplastic member 15 is melted. To do. If it does so, the front-end | tip part 16a will fall in the recessed part 2a with the urging | biasing force of the leaf | plate spring 17. FIG. Thereby, the stopper action of the lock pin 16 works to prevent the rotation of the inner case 2 (the reference numeral is that of Patent Document 3).

  The crime prevention structure of the handle lock disclosed in Patent Document 3 is applied to, for example, a door of a vending machine, but avoids a straight ball attack on the cylinder lock 3 incorporated in the plate-like handle 4 of the handle lock, and the outer cylinder. When an attack against the body (outer case) 5 is avoided and a drill attack is made from a portion near the lower end of the plate-like handle 4, the main member constituting the rotation prevention mechanism is the outer cylinder (outer case) 5. Since it is attached to the bottom portion of the rear end portion in a protruding state, there is a problem in crime prevention. Therefore, in the sense that there is an attack option other than the fusing means, there is a problem that the advantage of the security structure cannot be fully utilized if the thermoplastic member 15, the lock pin 16 or the like is used.

  Further, the crime prevention structure of the handle lock disclosed in Patent Document 3 has a problem that it cannot be attached to a desired part because it is necessary to consider the engagement relationship with the cam member constituting the locking / unlocking function. .

Patent Document 4 discloses an example of a “pin cylinder lock” to which the present invention can be applied.
JP 2003-13639 A JP 11-315654 A Japanese Patent Laid-Open No. 2004-244836 JP 2006-214153 A

  The intended object of the present invention is to fully utilize a rotation prevention mechanism for an inner cylinder using a thermoplastic member, a lock pin, etc., in a tumbler lock having a movable obstacle such as a drive pin or a disk tumbler. It is to be able to apply. In addition, the present invention is sufficient for fusing means and drill countermeasures. The second object of the present invention is to reduce the number of members constituting the rotation prevention mechanism and to incorporate it very easily into the rear end portion of the outer cylindrical body. In addition, since it does not participate in the locking mechanism on the front end side of the lock, only by forming a support hole or an engagement hole for the rotation prevention mechanism in the outer cylinder and the inner cylinder (including the tail piece), the rotation prevention mechanism Can be easily mounted. An additional object of the present invention is that the members of the rotation prevention mechanism for the inner cylinder can be easily combined with the tail piece.

  The security structure of the tumbler lock according to the present invention includes an outer cylinder, an inner cylinder that is rotatably fitted to the outer cylinder, an axial alignment with the inner cylinder, and a predetermined direction when the key is inserted. A plurality of movable obstacles that move, and when these movable obstacles are aligned, are integrated into the outer cylinder so as to rotate together with the inner cylinder or in cooperation with the inner cylinder by the operation force of the key. In the tumbler lock having a tail piece, a thermoplastic support hole is formed in a radial direction at a rear end portion of the outer cylindrical body, and a lock pin is integrally located on the inner peripheral surface of the support hole. A restricting member is fixedly fitted, while an engagement hole for the lock pin is formed on the rear end side of the inner cylinder or the inner end side of the tailpiece, and the tumbler lock is heated by the fusing means from the front. When the thermoplastic regulating member is melted, the thermoplastic regulating member is regulated. Solved, the lock pin is characterized in that its lower end is engaged entering the fall and the engagement hole by its own weight. In the above configuration, the thermoplastic regulating member is formed in a cylindrical shape and is fitted on the lock pin.

  The crime prevention structure of the tumbler lock according to the present invention includes an outer cylinder, an inner cylinder that is rotatably fitted to the outer cylinder, an axial alignment with the inner cylinder, and a predetermined key when inserting a key. A plurality of movable obstacles moving in the direction, and when these movable obstacles are aligned, the outer cylinder can be rotated by the operation force of the key to be rotated integrally with the inner cylinder or in cooperation with the inner cylinder. In a tumbler lock having a tail piece incorporated therein, a support hole is formed in a radial direction at a rear end portion of the outer cylindrical body, and a lock pin is integrally positioned on the inner peripheral surface of the support hole. A thermoplastic regulating member is fixedly fitted, and on the other hand, an engagement hole for the lock pin is formed on the rear end side of the inner cylindrical body or the inner end side of the tail piece, and the bottom surface of the inner wall of the engagement hole is formed. When the magnetic body is provided and the tumbler lock is heated and attacked by the fusing means from the front, the thermoplasticity Braking member is melted melts regulations thermoplastic regulating member, the lock pin is characterized in that its lower end to the engagement hole by the magnetic force of the magnetic body is engaged ON.

(A) As a countermeasure against fusing attack, the rotation preventing mechanism for the inner cylinder using a thermoplastic member, a lock pin, etc., can be fully utilized for a tumbler lock having a movable obstacle such as a drive pin or a disk tumbler. Can be applied as possible. In other words, even after a thief determines that a fusing attack is impossible, even if he uses a drill to attack the locking / unlocking mechanism straight, or avoiding the locking / unlocking mechanism, the outer edge of the outer cylinder Even if the attack is made indirectly from the vicinity of the part, the rotation preventing mechanism for the inner cylinder cannot be destroyed by the drill. Therefore, since the present invention is sufficient for countermeasures against drilling, the advantage of the rotation prevention mechanism for the inner cylinder can be effectively utilized.
(B) There are few each member which comprises a rotation prevention mechanism. In addition, since it is not involved in the locking mechanism on the front end portion side of the lock, the rotation prevention mechanism can be provided only by forming a support hole or an engagement hole for the rotation prevention mechanism in the outer cylinder body and the inner cylinder body (including the tail piece). The constituent members can be easily mounted.
(C) In the invention according to claim 4, the rotation preventing mechanism can be incorporated not only in the upper part of the outer cylinder but also in the left and right parts and the lower part of the outer cylinder.
(D) In addition, each member of the rotation prevention mechanism for the inner cylinder can be easily combined with the tail piece.

  The best mode for carrying out the present invention shown in FIGS. 1 to 11 will be described below (first embodiment).

(1) Environment for Implementing the Invention FIG. 1 is a schematic explanatory diagram (conceptual diagram) showing an environment for implementing the invention. Since FIG. 1 is a conceptual diagram showing an example of the tumbler lock X, detailed items are omitted.

  In FIG. 1, 1 is a metal outer cylinder, and this outer cylinder 1 is formed in the shape of a long cylinder whose front end and rear end are open. The length of the outer cylinder 1, the number of notches in the peripheral body, the number of engagement grooves on the inner peripheral surface, and the like are appropriately formed. Reference numeral 2 denotes an engagement recess formed in a rail shape in the axial direction on the inner peripheral surface along the generatrix AB of the outer peripheral surface of the outer cylindrical body 1. The engagement recess 2 includes an engagement means. The bar-shaped locking bar 3 is engaged and disengaged. The engaging means 3 is engaged with the inner end portion and the mountain-shaped outer end portion protruding from the longitudinal guide opening for the engaging means of the inner cylindrical body 4 that is rotatably fitted to the outer cylindrical body 1. Match. The inner cylinder 4 is also formed of a metal material in the shape of a long cylinder with both ends open, like the outer cylinder 1, but considering the insertion ratio of the key guide member 5 and the tail piece 6, the inner cylinder 4 Is also formed short.

  In other words, the inner cylindrical body 4 has a disk-like shape in the opening on the rear end side of the outer cylindrical body 1 and the key guide member 5 in which the hooked inner end is inserted into the opening on the distal end side of the outer cylindrical body 1. It is completely contained in the outer cylindrical body 1 in such a manner that it is sandwiched between the tail pieces 6 into which the end portions are inserted.

  7 is provided on the key guide member 5 side and the tail piece 6 side, respectively, for engaging means 3 for biasing the bar-like engaging means 3 in the direction of the rail-like engaging recess 2 of the outer cylinder 1. It is a biasing spring. Here, for convenience of description, the symbol a is the axial direction of the key guide member 5, the tail piece 6, or the inner cylinder 4, and the symbol b is the radial direction of those members.

  The key guide member 5 and the tail piece 6 are integrally connected through the inner cylinder 4. Therefore, when the key 8 is inserted into the key groove 5a of the key guide member 5 and rotated about the axial direction a, the key guide member 5, the inner cylinder 4 and the tail piece 6 simultaneously work together by the operating force. Rotate.

  Next, Y is a disc tumbler including a plurality of movable obstacles that are aligned with the inner cylinder in the axial direction and move in the radial direction when the key is inserted, and bar-like engagement means 3 that is a constituent member of the movable obstacle. (In this embodiment, the bar-shaped engaging means 3 which is a constituent member of the movable obstacle is aligned with the shear line 9). The plurality of movable obstacles of the locking / unlocking mechanism Y are aligned with the inner cylinder in the axial direction a or the generatrix direction AB of the outer cylinder.

  FIG. 3 shows an example of the locking / unlocking mechanism Y. For example, a movable obstacle (main tumbler) 11 shown in FIG. 4A and a movable obstacle (subnumbler) 11A shown in FIG. This locking / unlocking mechanism Y is well known or obvious to those skilled in the art, and will be described briefly with reference to FIGS. 3, 7 and 8. FIG. 3 shows the state before the joint key 8 is inserted into the tumbler lock X, FIG. 7 shows the state when the joint key 8 is inserted into the tumbler lock X, and FIG. 8 shows the state shown in FIG. Respectively.

  First, in FIG. 3, 13 is a support shaft for the movable obstacles 11 and 11A, and this support shaft 13 is installed horizontally on the key guide member 5 and the tail piece 6 as shown in FIG. Reference numeral 14 denotes a spring for a movable obstacle, and a base end portion is attached to a small circular mounting groove of the movable obstacles 11 and 11A, and a free end thereof is pressed against a part of the inner peripheral surface of the inner cylinder 4. ing.

  Reference numeral 15 denotes a key insertion port for the movable obstacles 11 and 11A, and a regulating rod 16 is located in the key insertion port 15. Similar to the support shaft 13, the restriction rod 16 is also provided horizontally on the key guide member 5 and the tail piece 6. The restriction rod 16 functions to restrict the movable range of the movable obstacles 11 and 11A that rotate in the left-right direction with the support shaft 13 as a fulcrum.

  Reference numeral 2 denotes the aforementioned rail-like engagement recess in the axial direction a, and 3 denotes a bar-like engagement means that engages with and disengages from the engagement recess 2. The engaging means 3 has a mountain-shaped non-numbered engaging portion at the outer end portion, while being engaged with a relief notch portion 17 for engaging means formed at the lower end portion of the movable obstacles 11 and 11A at the inner end portion. It has an inwardly projecting inner end that is removed.

  Reference numeral 18 denotes a plurality of partition plates (or partition members) interposed between the movable obstacles 11 and 11A. These partition plates 18 are also aligned in the axial direction a in the inner cylinder similarly to the movable obstacles 11 and 11A. ing. The partition plate 18 has a notch recess 19 for the engagement means 3 corresponding to the engagement recess 2 of the outer cylinder at a part of the outer peripheral edge. A detailed description of the configuration of the movable obstacles 11 and 11A and the operation of the locking / unlocking mechanism Y will be omitted.

(2) Rotation prevention mechanism Z for inner cylinder
In FIG. 1, Z is a rotation prevention mechanism for an inner cylinder incorporated in the rear end portion of the tumbler lock X. This rotation prevention mechanism Z is the main part (core) of the present invention.

  As described above, the tail piece 6 is configured to rotate together with the inner cylinder 4 by the operation force of the key 8 when the bar-shaped engaging means 3 or the movable obstacles 11 and 11A are aligned with the shear line 9. The disc-shaped inner end portion side is rotatably incorporated in the rear end portion of the outer cylindrical body 1.

  5 is a schematic cross-sectional explanatory view taken along line 5-5 of FIG. 1, and FIG. 6 is an exploded explanatory view of main members constituting the rotation prevention mechanism Z. With reference to FIGS. 1, 5 and 6, the rotation preventing mechanism Z for the inner cylinder of the first embodiment will be described.

  First, reference numeral 6 denotes a tail piece. In this embodiment, a disc-shaped rotation support plate 6a that is entirely installed in the rear end opening of the inner cylinder 4 and rotates together with the inner cylinder 4, and the rotation support plate. A tail piece main body 6b is integrally formed on one side surface (right side surface in FIG. 1) of 6a.

  In addition, a plate-like connecting portion 21 protrudes from the central portion of one side surface of the rotation support plate 6a, while the central portion of the joint surface of the disc-shaped inner end portion of the tailpiece body 6b A radial engagement groove 23 with which the coupling portion 21 is engaged is formed (see FIG. 5). Although the detailed portions are not denoted by reference numerals, the rear end portion of the support shaft 13 and the rear end portion of the regulating rod 16 are inserted into the upper and lower holes of the rotation support plate 6a, respectively. A support portion for supporting the biasing means 7 is formed at the lower portion of the rotation support plate 6a.

  On the other hand, the tailpiece main body 6b is fixedly fitted into the disc-shaped inner end 22 and the opening at the rear end of the outer cylinder 1 extending outward from the inner end 22. And a shaft portion 25 penetrating the annular stopper plate 24 (projecting from the rear end of the outer cylinder 1). An engagement rod 26 is attached to the shaft portion 25.

  Thus, each component of the rotation prevention mechanism Z is incorporated in the upper part of the rear end part of the tumbler lock X, preferably in the central part of the upper part of the rear end part. An example of each constituent member of the rotation prevention mechanism Z is composed of two articles, for example, a metal lock pin 31 and a cylindrical plastic regulating member 33 for the lock pin.

  By the way, in the thermoplastic regulating member 33 of the present embodiment, the upper end corresponding to the upper half is a large-diameter cylindrical portion 33a, while the lower end corresponding to the lower half is a small diameter continuous to the large-diameter cylindrical portion. It is the cylindrical part 33b. The large diameter cylindrical portion 33 a does not protrude from the upper wall portion of the rear end portion of the outer cylindrical body 1, and the lower end surface of the small diameter cylindrical portion 33 b does not protrude from the inner peripheral surface of the outer cylindrical body 1. As shown in FIG.

  Further, the lock pin 31 of the present embodiment corresponds to a stepped shape on the inner peripheral surface of the cylindrical thermoplastic regulating member 33, and a leg portion (upper end portion) 31a and a leg portion connected to the head portion. (Lower end portion) 31b, and the lower edge of the head portion 31a is supported by an indefinite step portion of the thermoplastic regulating member 33.

  Therefore, when the thermoplastic regulating member 33 is melted, the solution easily flows downward (inside the lock) through the mortar-shaped inclined surface 28a, and the lock pin 31 and the thermoplastic regulating member 33 are Since both are located inside the outer cylinder inside the bus bar AB position on the outer peripheral surface of the outer cylinder, a drill attack is virtually impossible.

  On the other hand, the upper part of the tailpiece body 6b is formed with engaging holes 29 that open upward and frontward and rearward (open in three directions), and the vicinity of the left and right edges of the engaging hole 29 is shown in FIG. As shown in FIG. Thus, the engagement hole 29 of the present embodiment is formed in a recess shape, and the left and right inner wall surfaces (the inner wall surface in the direction in which the inner cylinder 4 or the tail piece body 6b rotates) of the recess are It is an engagement surface that can be locked to the leg (lower end) 31 b of the lock pin 31.

  In addition, when the thermoplastic regulating member 33 is liquefied and flows through the inverted mortar-shaped inclined surface 28b, the flat-shaped portion 30 described above functions to temporarily stop there.

(3) When Attacked by Fusing Means FIG. 9 schematically shows a case when attacked by the fusing means 41. Here, it is assumed that the tumbler lock X is attached to the door D of the safe, for example. Therefore, suppose that it is difficult to unlock the tumbler lock X by a thief using a drill, and it is assumed that the fusing means 41 is used as shown in FIG. As described in Patent Document 1, when the tumbler lock X is heated and attacked by the fusing means 41, the thermoplastic regulating member 33 is melted (liquefied), and the regulation of the thermoplastic regulating member is released.

  Then, as shown in FIGS. 10 and 11, the lock pin 31 falls due to its own weight, and its leg (lower end) 31b engages with the engagement hole 29 of the tailpiece body 6b. That is, when the lock pin 31 falls, the shear line 9 is crossed, so that the rotation of the inner cylinder 4 is prevented via the tail piece 6.

  In addition, the engagement (unit-wise connection) relationship between the inner cylinder 4 and the tail piece 6 can be designed as appropriate. In this embodiment, for example, as shown in FIG. A required amount of an engagement notch portion is formed in the inner end portion 22 in the circumferential direction, and an arc-shaped connecting piece 4a protruding from the rear end opening of the inner cylinder 4 is fitted in the engagement notch portion.

  1 to 11 show a first embodiment of the present invention. The rotation prevention mechanism Z of the first embodiment has a cylindrical thermoplastic regulating member 33 as shown in FIG. 6 as a main part, but the design of the thermoplastic regulating member 33 can be arbitrarily changed. it can. 12 and FIG. 13 show different embodiments of the main part (thermoplastic regulating member) of the present invention. For example, the thermoplastic regulating member 33A shown in FIG. 12 is an incomplete cylindrical body, and a slit-shaped notch 41 is formed from the upper end surface of the large-diameter cylindrical portion 33a to the lower end surface of the small-diameter cylindrical portion 33b. Yes. If comprised in this way, since the thermoplastic regulating member 33A of an incomplete cylinder can be displaced outwardly by its material itself, the lock pin 31 can be easily inserted into the thermoplastic regulating member 33A.

  A thermoplastic regulating member 33B shown in FIG. 13 is obtained by dividing the cylindrical thermoplastic regulating member 33 of the first embodiment into left and right. Although not shown in the drawings, the thermoplastic regulating member 33 may be formed in a cap shape as long as the lock pin 31 can be integrally positioned on the inner peripheral surface thereof. In short, when the thermoplastic regulating member 33 is melted, the lock pin 31 falls due to its own weight, and the leg portion (lower end portion) 31b engages with the engagement hole 29 of the tailpiece body 6b. If so, the design can be changed to various shapes such as a cylindrical shape, a cylindrical shape, and a ring shape.

  Next, FIG.14 and FIG.15 shows the rotation prevention mechanism Z1 of 2nd Example. This rotation prevention mechanism Z1 is mainly different from the rotation prevention mechanism Z of the first embodiment shown in FIGS. 1 to 12 in that one component is added.

  That is, in this rotation prevention mechanism Z1, when the magnetic body 42 is provided on the inner wall bottom surface 29a of the engagement hole 29 and the tumbler lock is heated and attacked by the fusing means, the cylindrical thermoplastic regulating member 33 is melted and the heat The restriction of the plastic restricting member is released, and the lower end portion 31 b of the lock pin 31 is engaged with the engagement hole 29 by the magnetic force of the magnetic body 42.

  If comprised in this way, a rotation prevention mechanism can be incorporated not only in the upper part of an outer cylinder but in the right-and-left site | part and lower part of an outer cylinder.

  In addition, the application / unlocking mechanism Y of the tumbler lock X is not limited to an Example, For example, what was described in patent document 2 and the pin type cylinder lock described in patent document 4 may be sufficient.

  In this embodiment, the inner cylinder body and the tail piece are separate members, and the tail piece rotates together with the inner cylinder body. In the case where the piece is integrally molded and the case where the inner cylinder and tail piece are integrated, of course, a lock pin that comes into contact with the inner surface of the thermoplastic regulating member is provided at the rear end of the inner cylinder. You may do it.

  The present invention is mainly used in the locksmith and joinery industries.

1 to 11 show a first embodiment of the present invention, FIGS. 12 and 13 show different embodiments of the main part (thermoplastic regulating member) of the present invention, and FIGS. 14 and 15 show a rotation prevention mechanism Z1 of the present invention. This is a second embodiment of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS Schematic explanatory drawing (conceptual diagram) showing the environment for carrying out the invention. Explanatory drawing from the front. The longitudinal cross-sectional schematic explanatory drawing which shows an example of the application / unlocking mechanism Y (before inserting the key 8 in the tumbler lock X). 4A is a schematic explanatory view showing a movable obstacle (main tumbler) 11, and FIG. 4B is a schematic explanatory view showing a movable obstacle (sub tumbler) 11A. FIG. 5 is a schematic longitudinal sectional view taken along line 5-5 in FIG. The exploded perspective view of the main member which comprises the rotation prevention mechanism Z. FIG. FIG. 4 is a schematic explanatory diagram when the key 8 is inserted into the tumbler lock X in FIG. 3. In the state of FIG. 7, the schematic explanatory drawing of the state which turned the movable obstacle to the arrow direction with the joint key 8. FIG. The schematic explanatory drawing at the time of being attacked by the fusing means 41. FIG. Schematic explanatory drawing when the plastic regulation member is melted and the regulation is released. Schematic explanatory drawing when the plastic regulation member is melted and the regulation is released. The Example (slit type | mold) from which the principal part (thermoplastic control member) of this invention differs. The Example (partition type | mold) from which the principal part (thermoplastic control member) of this invention differs. The longitudinal cross-sectional schematic explanatory drawing similar to FIG. 5 of 2nd Example. FIG. 15 is a schematic explanatory diagram when the plastic regulating member is melted and the regulation is released in FIG. 14.

Explanation of symbols

  X ... Tumbler lock, Y ... Applying / unlocking mechanism, Z, Z1 ... Rotation prevention mechanism for inner cylinder, 1 ... Outer cylinder, a ... Axial direction, 2 ... engagement recess, 3 ... engagement means, 4 ... Inner cylinder body, 4a ... Inner cylinder connecting piece, 5 ... Key guide member, 6 ... Tail piece, 6a ... Rotation support plate, 6b ... Tail piece body, 7 ... Biasing spring for engaging means, 8 DESCRIPTION OF SYMBOLS 9: Shear line, 13 ... Support shaft, 14 ... Spring for movable obstruction, 11, 11A ... Movable obstruction, 16 ... Restriction bar, 17 ... Relief notch for engaging means, 18 ... Partition plate (Partition plate member), 19 ... cutout recess for engaging means, 21 ... connecting part, 22 ... inner end, 23 ... engaging groove, 24 ... annular stopper plate, 25 ... shaft part, 26 ... engaging rod 27 ... support hole, 28a ... mortar-like inclined surface, 28b ... reverse mortar-like inclined surface, 29 ... engagement hole, 30 ... flat portion, 29a ... inner wall bottom surface, 3 ... Metal locking pin, 31a ... head (upper portion), 31b ... legs (lower end portion), 33 and 33A, 33B ... thermoplastic regulating member, 33a ... large-diameter cylindrical-shaped portion, 42 ... magnetic material.

Claims (4)

An outer cylinder, an inner cylinder that is rotatably fitted to the outer cylinder, a plurality of movable obstacles that are aligned with the inner cylinder in the axial direction and move in a predetermined direction when a key is inserted, and A tumbler lock equipped with a tail piece that is pivotally incorporated in the outer cylinder so as to rotate together with the inner cylinder or in cooperation with the inner cylinder by the operation force of the key when the movable obstacles are aligned. In this case, a support hole 27 is formed in the rear end portion of the outer cylindrical body in the radial direction, and a thermoplastic regulating member (33, 33A, 33B) in which the lock pin 31 is integrally positioned on the inner peripheral surface of the support hole. On the other hand, an engagement hole 29 for the lock pin is formed on the rear end side of the inner cylinder 4 or the inner end side of the tail piece 6, and the tumbler lock X is blown from the front surface. When the heat attack is performed by the above, the thermoplastic regulating member melts and the thermoplastic regulating portion Melting regulation of said lock pin is crime prevention structure of tumbler, characterized in that its lower end is engaged entering the fall and the engagement hole by its own weight. 2. The security structure for a tumbler lock according to claim 1, wherein the thermoplastic regulating member is formed in a cylindrical shape and is externally fitted to the lock pin. 2. The crime prevention structure for a tumbler lock according to claim 1, wherein the thermoplastic regulating member and the lock pin are provided inside the position of the bus bar AB on the outer peripheral surface of the outer cylinder. An outer cylinder, an inner cylinder that is rotatably fitted to the outer cylinder, a plurality of movable obstacles that are aligned with the inner cylinder in the axial direction and move in a predetermined direction when a key is inserted, and A tumbler lock equipped with a tail piece that is pivotally incorporated in the outer cylinder so as to rotate together with the inner cylinder or in cooperation with the inner cylinder by the operation force of the key when the movable obstacles are aligned. In this case, a support hole is formed in a radial direction at a rear end portion of the outer cylindrical body, and a thermoplastic regulation member in which a lock pin is integrally positioned on the inner peripheral surface is fixedly fitted into the support hole, An engagement hole for the lock pin is formed on the rear end side of the inner cylinder or on the inner end side of the tailpiece, and a magnetic body 42 is provided on the inner wall bottom surface of the engagement hole so that the tumbler lock is blown from the front surface. When the heat attack is performed by the means, the thermoplastic regulating member melts and the thermoplastic regulating member Regulation melts, the lock pin is crime prevention structure of tumbler, characterized in that its lower end to the engagement hole by the magnetic force of the magnetic body is engaged ON.

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