JP4865487B2 - Cylinder lock - Google Patents

Description

  The present invention relates to a cylinder lock.

  As a cylinder lock in which a hard cap member is attached to the tip in order to prevent a breaking operation by a drill, one described in Patent Document 1 is known.

In this conventional example, a protective disk (hard cap) is provided at the tip of a rotor (plug body) that is inserted into a fixed case (cylinder case) with a key hole (key insertion hole) for inserting a key (unlocking key). ) Is installed. The protective disk is formed of a hard material excellent in drill cutting resistance, and the breakage of the rotor by the drill inserted from the key hole is prevented.
Japanese Patent No. 2881002

  However, in the above-described conventional example, since the hard material is generally brittle, for example, if a tip of a tool such as a screwdriver is inserted into a key insertion hole (key insertion opening) opened in the protective disk and a striking force is applied. , Brittle fracture may occur. Once the protective disk is broken, access to the keyhole of the rotor becomes possible, so that an attack by a drill or the like cannot be prevented.

  The present invention has been made to solve the above-described drawbacks, and an object of the present invention is to provide a cylinder lock having high resistance against unauthorized attacks.

According to the present invention, the object is
A plug in which a hard cap 4 having a key insertion opening 6 communicating with the key insertion hole 1 is attached to the front end of a plug body 3 that holds a tumbler 2 that is movable forward and backward toward a key insertion hole 1 formed in a longitudinal direction. 5
A front end face of the plug body 3, between the hard substance cap 4, wherein the hard metallic material and the plug body 3 and the rigid cap 4 is formed separately, communicates with the key insertion hole 1, the key insertion opening 6 is provided with a reinforcing member 8 having a communication opening 7 substantially congruent to 6 in the central portion,
The hard cap 4 is achieved by providing a cylinder lock provided with a protrusion 9 that surrounds the entire outer periphery of the reinforcing member 8.
The above purpose is
A plug 5 having a hard cap 4 attached to the front end of a plug body 3 that holds a tumbler 2 that is movable forward and backward toward a key insertion hole 1 formed in a longitudinal direction;
Between the front end surface of the plug main body 3 and the hard cap 4 having the key insertion opening 6 communicating with the key insertion hole 1, the communication opening that communicates with the key insertion hole 1 and is substantially congruent with the key insertion opening 6. A reinforcing member 8 having a central portion 7 is interposed,
This can be achieved by providing the hard cap 4 with a cylinder lock provided with a protrusion 9 that surrounds the entire outer periphery of the reinforcing member 8.

  The hard cap 4 attached to the front end of the plug body 3 has sufficient resistance against a cutting tool such as a drill, and can prevent an attack using the drill against the plug body 3.

  The hard cap 4 is provided with a key insertion opening 6 for inserting an unlocking key into the plug body 3, and the protrusion 9 is formed so as to surround the key insertion opening 6 over the entire circumference. Thus, a thick portion is formed at the periphery of the region where the key insertion opening 6 is provided.

  When the tip of a tool such as a screwdriver is inserted into the key insertion opening 6 of the hard cap 4 and a hit is applied, cracks generated at stress concentration locations such as corners of the key insertion opening 6 are However, the protrusion 9 which is thicker than the thickness around the key insertion opening 6 provides a thick portion in a direction perpendicular to the propagation direction of the crack, thereby restricting crack progression. I can expect.

  Further, in order to propagate the crack to the end of the material and break the hard cap 4, it is necessary to further widen the key insertion opening 6 with a tool, and a reinforcing member having substantially the same shape and size as the key insertion opening 6. It is necessary to widen the eight communication openings 7. Since the reinforcing member 8 is formed separately from the hard cap 4, in order to expand the communication opening 7, it is necessary to newly generate a crack in the communication opening 7 or to apply a plastic deformation. Since the force for this is larger than the force required for propagation of the crack once generated, the progress of the crack in the hard cap 4 is restricted by the reinforcing member 8.

  Therefore, in this invention, in addition to the drill cutting attack to the tip of the cylinder lock, it is possible to exert a great resistance to the attack by the plastic breaking operation, and therefore the resistance to the illegal breaking operation can be increased.

  Further, when the displacement of the hard cap 4 in the diameter expansion direction is restricted by the cylinder case 12, the crack propagation is restricted because the crack opening is prevented from spreading.

Furthermore, in order to increase the resistance to the destruction operation to the hard cap 4, the cylinder lock is
The reinforcing member 8 and the plug body 3 are connected to each other in the rotational direction by a connecting pin 11, and are relatively rotatable in a broken state of the connecting pin 11.
The reinforcing member 8 and the hard cap 4 can be configured to be connected in the rotation direction by a rotation stopper 10 formed on the protrusion 9 of the hard cap 4 and the reinforcing member 8.

  In this invention, when an illegal destruction operation is performed on the hard cap 4 such as drilling the hard cap 4 with a drill or forced rotation operation using a pipe wrench or the like to the hard cap 4, the rotation applied to the hard cap 4 is performed. Torque is transmitted to the reinforcing member 8 through the rotation stopper 10. Since the plug body 3 cannot rotate with respect to the cylinder case 12 in the locked state, the rotational torque is generated at the boundary between the plug body 3 and the reinforcing member 8, and the relative rotation between the plug body 3 and the reinforcing member 8 is caused. It acts as a shearing force on the connecting pin 11 that is restricted.

  If the shearing strength of the connecting pin 11 is set to the torque generated by the above-described unauthorized breaking operation, when the unauthorized opening operation is applied to the hard cap 4, the connecting pin 11 is broken and the plug body 3 and the reinforcing member 8, That is, the hard cap 4 idles with respect to the plug body 3, and thereafter, the illegal destruction operation to the hard cap 4 is completely impossible.

  Further, since the connecting pin 11 is disposed at the boundary between the reinforcing member 8 and the plug body 3, it is not necessary to provide a recess for receiving the connecting pin 11 in the hard cap 4. As a result, it is possible to prevent generation of a new crack propagation path due to formation of an unnecessary thin portion in the hard cap 4.

  According to the present invention, by arranging the hard cap at the front end of the plug, it is possible to reliably prevent an unauthorized destruction operation to the plug. In addition, by disposing a reinforcing member between the hard cap and the plug main body, it is possible to improve resistance against unauthorized destruction of the hard cap.

  FIG. 1 shows a cylinder lock used in an automobile handle device. In this embodiment, the handle device includes a handle base 14 fixed to the door, and a handle body 15 connected to the handle base 14. The handle main body 15 can be rotated around the rotation shaft 15a between an initial position indicated by a solid line in FIG. 1 and a door opening operation position indicated by a chain line, and the handle base 14 has a handle main body 15 at an initial position. A handle recess 14a that provides a handle space for turning the hand on the back surface is formed.

  When the handle main body 15 is rotated to the rotation operation position while being fixed to the door, the door lock, not shown, arranged in the door is released from the vehicle body side, and the door can be opened.

  The cylinder lock is fixed to the handle base 14 in order to operate a locking portion (not shown) disposed in the door in order to prohibit or allow the handle main body 15 to operate the door lock. In this embodiment, in addition to the above-described cylinder lock, an electrical access means using an actuator driven on the basis of the establishment of authentication in the authentication means (not shown) is prepared as an access means to the locking portion. Used as a preliminary access means.

  A cylinder lock is shown in FIG. The cylinder lock is formed by rotatably inserting the plug 5 into the cylinder case 12, and is fixed to the handle base 14 via the adapter 16. The adapter 16 is formed by protruding a fixed wing piece 16b from the outer periphery of the cylindrical portion 16a into which the cylinder case 12 is inserted, and is fixed to the handle base 14 at the fixed wing piece 16b. An O-ring 16 c for closing a gap with the cylinder case 12 to be inserted is attached to the front end of the cylindrical portion 16 a of the adapter 16.

  The plug 5 includes a plug body 3 that holds a plurality of tumblers 2 that can advance and retreat toward a key insertion hole 1 that is formed in a longitudinal direction, a hard cap 4 that is disposed in front of the plug body 3, And a reinforcing member 8 interposed between the hard cap 4 and the hard cap 4. The hard cap 4 and the reinforcing member 8 are each formed with a key insertion opening 6 and a communication opening 7 that communicate with the key insertion hole 1 of the plug body 3.

  When the plug body 3 is in the locking rotation position, the tumbler 2 of the plug body 3 is disposed on the cylinder case 12 side and faces the drive pin 12b urged to the plug body 3 side by the compression spring 12a so as to face the key insertion hole. Protrudes into 1. The drive pin 12b is positioned at the rotation boundary between the cylinder case 12 and the plug body 3 in a state where the unlock key 17 is not inserted or an unlock key 17 which is not authentic is inserted into the key insertion hole 1 and closes the rotation boundary. Then, the rotation operation to the plug body 3 is restricted. When the genuine unlock key 17 is inserted from this locked state as shown in FIG. 3B, the boundary between the drive pin 12b and the tumbler 2 moves to the rotational boundary between the cylinder case 12 and the plug body 3, and the plug The rotation operation to the main body 3 becomes possible. In FIG. 2, 12c denotes a cover plate for restricting the drive pin 12b from popping out.

  The hard cap 4 is formed of a hard metal material having good cutting resistance performance with a drill such as chromium molybdenum steel. The hard cap 4 is fitted on the front end portion of the cylinder case 12 and is free to rotate using a C-shaped retaining ring 18 interposed between the outer peripheral wall of the cylinder case 12 and the inner peripheral wall of the hard cap 4. Installed.

  The hard cap 4 includes a protrusion 4a that protrudes from the center of the front end and is cut by a male screw into which a female screw of a cap member described later is screwed, and a ring-shaped protrusion 9 that protrudes toward the plug body 3 side. As shown in FIG. 4B, the protrusion 9 has a circular shape whose outer peripheral wall is concentric with the center of rotation of the plug body 3, and whose inner peripheral wall does not contact the edge of the key insertion opening 6. Further, the outer periphery of the ridge 9 is in sliding contact with a ring-shaped regulating wall 13 projecting from the cylinder case 12, and movement in the diameter increasing direction is regulated.

  The reinforcing member 8 is a plate-like body that is surrounded by the protrusion 9 and fits into a recess 4 b formed in the hard cap 4, and is formed of a hard metal material in the same manner as the hard cap 4. On the outer peripheral wall of the reinforcing member 8 and the recess 4b, a rotation stopper 10 made of a flat surface is formed, and relative rotation is prohibited. Further, the reinforcing member 8 is placed on the front end surface of the plug body 3, and mutual idling is restricted by the connecting pin 11 that is broken by a predetermined shearing force.

  Therefore, in this embodiment, when rotational torque is applied to the hard cap 4, the relative relationship between the plug main body 3 and the reinforcing member 8 to which the rotational torque is transmitted to the hard cap 4 via the rotation stopper 10. A rotational torque is generated, and a shearing force acts on the connecting pin 11. As a result of the attack on the hard cap 4 using a drill or the like, when a predetermined rotational torque is applied to the hard cap 4, the connecting pin 11 is sheared and broken, and thereafter the hard cap 4 is against the plug body 3. Idling to prevent application of further breaking torque.

  Moreover, since propagation of cracks from the corners of the key insertion opening 6 of the hard cap 4 can be suppressed, a driver or the like is driven into the key insertion opening 6 to widen the key insertion opening 6 and destroy the high-quality cap. It is possible to destroy the high system against illegal destruction operations.

  As shown in FIG. 5, the cylinder lock configured as described above is attached to the handle base 14 in a posture in which the protrusion 4 a of the hard cap 4 is inserted into the through hole 14 b formed in the handle recess 14 a of the handle base 14. Fixed. As shown in FIG. 5A, the protrusion 4a is hidden behind the handle body 15 in the initial position and cannot be seen from the outside, with the handle device fixed to the automobile door. When the lens is rotated to the rotation operation position, the field of view of the handle body 15 is eliminated and the view becomes visible.

  Further, a cap member 19 is detachably mounted on the projection 4a of the cylinder lock. The cap member 19 is a cylindrical member whose one end is closed. The cap member 19 is attached to the cylinder lock by screwing a female screw formed on the inner peripheral wall into the male screw of the protrusion 4a. In order to facilitate the screwing operation of the cap member 19, an operation slit 19 a slightly wider than the coin thickness is formed on the closed end surface of the cap member 19.

  In the state where the cap member 19 is mounted, the entire protrusion 4a of the cylinder lock is covered with the cap member 19 so that the key insertion hole 1 is completely closed, so that intrusion of dust, water and the like into the plug 5 is prevented.

  A seal ring 20 is wound around the outer periphery of the cap member 19, and the inner peripheral wall surface of the through hole 14b is a tapered surface that gradually increases in diameter in the vehicle width direction. When the cap member 19 is screwed into the protrusion 4a from the side, as shown in FIG. 5 (b), the seal ring 20 is pressed against the tapered surface of the through hole 14b to seal the periphery of the through hole. Leakage of water from the inside of the panel is prevented.

It is a figure which shows a handle apparatus, (a) is a front view, (b) is the 1B-1B sectional view taken on the line of (a). It is a disassembled perspective view of a cylinder lock. It is a figure which shows a cylinder lock, (a) is a front view, (b) is the 3B-3B sectional view taken on the line of (a). It is sectional drawing of a cylinder lock, (a) is the sectional view on the 4A-4A line of Fig.3 (a), (b) is the sectional view on the 4B-4B line of FIG.3 (b). It is sectional drawing which shows the attachment state to a handle | steering-wheel main body, (a) is before cap member mounting | wearing, (b) shows after cap member mounting | wearing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Key insertion hole 2 Tumbler 3 Plug body 4 Hard cap 5 Plug 6 Key insertion opening 7 Communication opening 8 Reinforcement member 9 Projection 10 Non-rotating part 11 Connecting pin 12 Cylinder case 13 Restriction wall

Claims (4)

It has a plug with a hard cap provided with a key insertion opening communicating with the key insertion hole at the front end of the plug body holding a tumbler that is movable forward and backward toward a key insertion hole formed in a longitudinal direction,
A front end face of the plug body, between the hard substance cap, and the plug body and the hard cap of a hard metal material are formed separately, it communicates with the key insertion hole, substantially congruent communicating with the key insertion opening While a reinforcing member having an opening in the center is interposed,
A cylinder lock in which the hard cap is provided with a protrusion that surrounds the entire outer periphery of the reinforcing member. The reinforcing member and the hard cap are connected in the rotational direction by a rotation stopper formed on the ridge and the reinforcing member of the hard cap, and the reinforcing member and the plug body are connected in the rotational direction by a connecting pin. Let the connecting pin bear the resistance against the rotational operation force to the hard cap,
2. The cylinder lock according to claim 1, wherein when an excessive rotational force is applied to the hard cap, the connecting pin is sheared and broken so as to be idled with respect to the plug body.   The cylinder lock according to claim 1 or 2, wherein a restriction wall that restricts the diameter expansion of the hard cap is provided on a cylinder case that rotatably holds the plug. The hard cap is rotatably connected to the cylinder case to cover the front end of the cylinder case , and the outer periphery of the protrusion is formed in a circular shape centering on the rotation center of the plug,
The cylinder lock according to claim 3, wherein the restriction wall is in sliding contact with the outer periphery of the protrusion.

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