JP2010112064A - Cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve anticrime reliability by obtaining a cylinder lock capable of undergoing a force resisting an act of destruction using a drilling tool. <P>SOLUTION: This cylinder lock 100 includes: an outer cylinder 17 in which an inner cylinder 15 having a keyhole 13 in a front surface 11 is turnably and internally provided; a locking bar 19 which is retreatably protruded toward the outer cylinder 17 from the inner cylinder 15, and which can regulate the turning of the inner cylinder 15; a protrusive streak 23 which is formed along the direction of an axis line G on the outer peripheral surface 17a of the outer cylinder 17, and which has a groove 21 enabling the protrusion of the locking bar 19 in the direction of regulating rotation; and an outer cylinder cover 35 which has a central opening hole 25 for the exposure of the keyhole in a front plate 27, in which a fitting groove 29 for being fitted to the protrusive streak 23 is provided on an inner surface in a direction along the axis line G, and which makes the outer cylinder 17 attached from a rear portion 33. The cylinder lock 100 is provided with a pin insertion hole which is drilled in the direction of a straight line connecting both ends of an arc of an inner peripheral circle of the outer cylinder cover 35 and which is arranged in the front plate 27 except the central opening hole 25, and a superhard pin 41 which is fitted into the pin insertion hole and made of a rigid material. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cylinder lock in which a cemented carbide tip is provided, and more particularly, to a cylinder lock having a structure capable of effectively exerting a drag force by burying a cemented carbide tip against a breaking action using a hole saw.

  In general, a cylinder lock is provided with an inner cylinder rotatably inside an outer cylinder, and a pin divided into two is inserted in the radial direction at the boundary between the two, and the pin is locked by the notch of the matching key inserted into the key hole of the inner cylinder. By moving the dividing position to the boundary part, the inner cylinder can be rotated with respect to the outer cylinder on the fixed side, and the locking and unlocking device is operated via a rotation transmission member provided at the rear end of the inner cylinder, a so-called tail piece, It can be locked and unlocked.

  The pin-type cylinder lock described above divides a plurality of divided pin groups arranged along the axial direction by inserting a tool into the keyhole and repeating the pin retraction operation while applying a rotational force to the inner cylinder. There is a possibility that it may become an object of unauthorized unlocking called so-called picking, in which all the positions are finally coincided with the boundary portion and the inner cylinder can be rotated.

  On the other hand, even when a rotational force is applied to the inner cylinder, a rocking bar type cylinder lock that is difficult to temporarily hold a rotation restricting member such as a pin in the restriction release position tends to be widely used. The locking bar type cylinder lock has an outer cylinder cover as an exterior member, and a lock body composed of an inner cylinder and an outer cylinder is mounted from the rear end inside the outer cylinder cover. An inner cylinder is rotatably provided in the outer cylinder, and the inner cylinder is restricted / removed by a long locking bar along an axial direction arranged at the boundary with the outer cylinder. For example, a lock body with a disk-type tumbler has its locking bar pressed against the groove of the outer cylinder by a spring with the key unlocked, and even if the inner cylinder is rotated in this state, the locking bar is notched back. Since it does not exist in the tumbler, the locking bar cannot come out of the groove and the inner cylinder cannot be rotated.

On the other hand, when the key is inserted, the tumbler is pushed by the step of the key, and the notch is aligned with the locking bar. When the inner cylinder is rotated in this state, due to the groove and the taper of the locking bar, the locking bar moves inward in the radial direction of the outer cylinder against the spring and enters the notch, the locking bar comes out of the groove, Release the cylinder rotation restriction. On the top and bottom of the outer periphery of the outer cylinder, protrusions for forming grooves are formed along the axial direction. This protrusion is fitted into a fitting groove formed in the axial direction on the inner peripheral surface of the outer cylinder cover. In this structure, even if a rotational force is applied to the inner cylinder, the notch of the tumbler cannot be temporarily held by the locking bar, so that the resistance to picking can be increased.
JP 2006-37343 A Japanese Utility Model Publication No. 6-32639 JP 2006-265860 A Japanese Patent Laid-Open No. 10-8895

Although it is a rocking bar type cylinder lock with enhanced resistance to picking, in recent years there has been an increasing trend of unauthorized unlocking crimes due to destruction using a hole saw. The locking bar type cylinder lock has the lock body fixed inside the outer cylinder cover protruding from the door surface, and only the front surface of the inner cylinder is exposed from the central opening hole of the outer cylinder cover attached so as to cover the front end surface. Let's improve crime prevention.
However, on the back portion of the front plate, a front end surface of the outer cylinder and a ridge having a locking bar provided concentrically exist. For this reason, if a hole saw is used as a cylindrical hole drilling tool, especially if a cylindrical cut is made from the front end surface of the outer cylinder cover, unauthorized unlocking due to removal of the inner cylinder, destruction of the locking bar, etc. is possible. Included.
As a countermeasure against such destruction, a sphere made of a hard material is embedded in a cut-out portion of a hole saw to increase the resistance (for example, see Patent Documents 1 and 2), or a pin made of a hard material is radially arranged on the front end surface. The one that has been embedded and has increased resistance (see, for example, Patent Documents 3 and 4) has been proposed.
However, the hard sphere can be taken out by perforating the front plate with a relatively small area. Further, in the structure in which the hard pins are provided in the radial direction, the breaking strength of the cylindrical hole saw cannot be sufficiently increased because it intersects with the cutting circle of the cylindrical hole saw only at one place.
The present invention has been made in view of the above situation, and an object of the present invention is to provide a cylinder lock capable of imparting a high resistance to a destructive action using a drilling tool, thereby improving crime prevention reliability.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The cylinder lock according to the first aspect of the present invention projects an outer cylinder 17 in which an inner cylinder 15 having a keyhole 13 on the front face 11 is rotatably provided, and projects so as to be able to retract from the inner cylinder 15 toward the outer cylinder 17. There is a locking bar 19 that can restrict the rotation of the inner cylinder 15 and a groove 21 that is formed along the axis G direction on the outer peripheral surface 17a of the outer cylinder 17 and that allows the locking bar 19 to protrude in the rotation restricting direction. The outer cylinder 17 has a protrusion 23 and a central opening hole 25 for exposing the keyhole in the front plate 27 and a fitting groove 29 that fits the protrusion 23 on the inner surface 31 in the direction along the axis G. A cylinder lock 100 having an outer cylinder cover 35 that is mounted from the rear portion 33,
A pin insertion hole 39 which is perforated in a linear direction a connecting both ends p and q of the arc 37 of the inner circumferential circle 35a of the outer cylinder cover 35 and disposed in the front plate 27 excluding the central opening hole 25;
A cemented carbide pin 41 fitted into the pin insertion hole 39 and made of a hard material;
It is characterized by comprising.

  In this cylinder lock, the cemented carbide pin 41 extends in the direction of the straight line connecting both ends p and q of the arc 37 of the outer periphery 35a of the outer cylinder cover, that is, the string 38. For example, the outer cylinder cover 35 is cut and removed. When trying to do so, it is necessary to perforate a large area for removal compared to a hard sphere, and the time required for destruction increases. In addition, the carbide pins 41 always intersect the hole saw cutting circle at two positions obliquely, and the number of contact points increases as compared with the conventional structure in which the hard pins are provided in the radial direction. As a result, the hole portion of the hole saw comes into contact with the outer peripheral surface of the cemented carbide pin 41 and can be easily slipped, and the cut surface can be increased and the time required for breaking can be increased.

The cylinder lock according to claim 2 is the cylinder lock according to claim 1,
The pin insertion hole 39 is disposed so as to overlap with the front position of the locking bar 19.

  In this cylinder lock, the cemented carbide pin 41 is arranged so as to cross the front position of the locking bar 19, and when it breaks from the front surface 11, it hits the cemented carbide pin 41 before reaching the locking bar 19. High resistance is given to the destructive action using the drilling tools such as.

The cylinder lock according to claim 3 is the cylinder lock according to claim 1 or 2,
The pin insertion hole 39 is formed by perforation from the side edge side of the front plate 27 so that the rotation direction side of the hole saw becomes the bottom 39a of the hole.

  In this cylinder lock, when the cutting edge of the hole saw contacts the carbide pin 41 and the carbide pin 41 is urged in the direction along the pin central axis on the rotation direction b side of the hole saw, the carbide pin 41 is moved. The tip end surface of the moving side abuts against the bottom 39a of the hole, and the carbide pin 41 is prevented from coming off from the pin insertion hole 39.

The cylinder lock according to claim 4 is the cylinder lock according to any one of claims 1, 2, and 3,
A plurality of bottomed screw holes 43 into which the fixing screws are screwed are formed in the outer cylinder cover 35 along the axis G from the rear end surface 45.
A sub-pin insertion hole 49 having the same center 47 as the bottomed screw hole 43 is formed in the front portion of the outer cylinder cover 35, and
The auxiliary carbide pin 51 is press-fitted into the auxiliary pin insertion hole 49.

  In this cylinder lock, even if an attempt is made to break the fixing screw that is coaxially drilled into the bottomed screw hole 43 using a drill from the front side of the outer cylinder cover 35 and is screwed into the bottomed screw hole 43, the bottomed screw hole Since the secondary carbide pin 51 is interposed in front of the center 43 at the same center 47, it strikes the secondary carbide pin 51 before reaching the bottomed screw hole 43, and acts against the destruction of the fixing screw using a hole saw or a drill. High resistance is also given.

  According to the cylinder lock of the first aspect of the present invention, both ends of the arc of the inner circumference circle are connected to the outer cylinder cover which has the central opening hole for exposing the keyhole in the front plate and the outer cylinder is mounted from the rear part. Drilled in a straight direction and provided with a pin insertion hole on the front plate excluding the central opening hole and a hard pin made of a hard material that is inserted into the pin insertion hole and drilled in a larger area than a hard sphere. And the time required for destruction can be increased. In addition, the carbide pins always intersect the hole saw cutting circle at two positions obliquely, and this also makes it possible to increase the time required for the fracture as compared with the conventional structure in which the hard pins are provided in the radial direction. As a result, it is possible to impart a high resistance to the destructive action using the drilling tool and improve the security reliability.

  According to the cylinder lock of the second aspect, since the pin insertion hole is arranged so as to overlap the front position of the locking bar, it hits a cemented carbide pin which is not easy to cut before reaching the locking bar. It is possible to give a high resistance to the destructive action using the drilling tool and improve the security reliability.

  According to the cylinder lock of the third aspect, since the pin insertion hole is the bottom part of the hole saw in the rotation direction, the blade part of the hole saw contacts the carbide pin during the cutting process, and the carbide pin rotates the hole saw. Even when urged in the direction along the pin central axis on the direction side, the moving-side tip surface of the carbide pin abuts against the bottom of the hole, and can be reliably prevented from coming out of the pin insertion hole. Also by this, it is possible to give a high resistance to the vandalism and improve the security reliability.

  According to the cylinder lock of the fourth aspect, a plurality of bottomed screw holes into which the fixing screws are screwed are formed in the outer cylinder cover along the axis from the rear end surface. A secondary pin insertion hole with the same center as the bottom screw hole is drilled, and the secondary carbide pin is press-fitted into this secondary pin insertion hole. The cylinder lock can be prevented from being pulled out by breaking the fixing screw that is coaxially drilled in the bottomed screw hole, and it can provide high resistance against drilling in addition to the resistance against the hole saw. The crime prevention reliability can be further improved.

Hereinafter, preferred embodiments of a cylinder lock according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view of a surface including an axis of a cylinder lock according to the present invention.
The cylinder lock 100 includes an outer cylinder 17 in which an inner cylinder 15 having a key hole 13 on the front surface 11 is rotatably provided, and a rearward projecting from the inner cylinder 15 toward the outer cylinder 17 to rotate the inner cylinder 15. A locking bar 19 that can be restricted, a protrusion 23 that has a groove 21 that is formed on the outer peripheral surface 17a of the outer cylinder 17 along the axis G direction and that allows the locking bar 19 to protrude in the rotation restricting direction, and a keyhole The front plate 27 has a center opening hole 25 for exposure and a fitting groove 29 for fitting with the protrusion 23 on the inner surface 31 (see FIG. 3) in the direction along the axis G, and the outer cylinder 17 from the rear portion 33. And an outer cylinder cover 35 to be mounted.

  A lock box 5 is fixed to the interior 3 of the door 1, and the lock box 5 is provided with a rotation input member 7 for operating an internal locking / unlocking mechanism on the outdoor surface. A mounting hole 9 for the cylinder lock 100 is opened on the outdoor surface 1 a of the door 1, and the mounting hole 9 allows the cylinder lock 100 to be fitted from the rear portion 33. A rotation output member, a so-called tail piece 36 protrudes from the rear portion 33 of the cylinder lock 100, and the tail piece 36 is connected to the rotation input member 7. In the cylinder lock 100, when a not-shown companion key is inserted into the keyhole 13 and the inner cylinder 15 is rotated, the tail piece 36 is rotated together with the inner cylinder 15, and is applied to the lock box 5 via the rotation input member 7. Enter the force to rotate the lock. The lock box 5 to which the locking / unlocking operation force has been input is engaged / engaged with a strike (not shown) provided in the opening frame by advancing and retracting a dead bolt (not shown) from the mouth of the door 1 by an internal locking / unlocking mechanism. It is unlocked and unlocked.

FIG. 2 is a front view in which the inner cylinder of the cylinder lock shown in FIG. 1 is omitted.
A pair of parallel pin insertion holes 39, 39 are formed in the front plate 27 of the outer cylinder cover 35, and the pin insertion holes 39, 39 are arranged at positions rotated about the axis G by 180 degrees. That is, in FIG. 2, the upper pin insertion hole 39 has a pin insertion opening on the left, and the lower pin insertion hole 39 has a pin insertion opening on the right.

  The pin insertion hole 39 is perforated in the direction a of a straight line (that is, a string) 38 that connects both ends p and q of the arc 37 of the inner circumferential circle 35 a of the outer cylinder cover 35, and is arranged on the front plate 27 excluding the central opening hole 25. It is installed. A carbide pin 41 shown in FIG. 1 made of a hard material is inserted into the pin insertion hole 39. The cemented carbide pin 41 is inserted by being press-fitted into the pin insertion hole 39 and cannot be removed after insertion. As the material of the cemented carbide pin 41, a material such as a cemented carbide alloy, ceramics or the like that is almost impossible to cut with a hole saw or a drill is used.

  In the present embodiment, a pair of protrusions 23, 23 extending along the axis G are provided above and below the outer peripheral surface 17 a of the outer cylinder. A groove 21 is formed inside the protrusion 23, and the groove 21 accommodates a locking bar 19 that can restrict the rotation of the inner cylinder 15. The protrusion 23 that accommodates the locking bar 19 is fitted into a fitting groove 29 shown in FIG. 1 formed in the direction along the axis G on the inner circumferential circle 35 a of the outer cylinder cover.

  As shown in FIG. 2, the pin insertion hole 39 is arranged and formed at a position overlapping the front position of the locking bar 19. That is, a part of the cemented carbide pin 41 extending in parallel with the paper surface overlaps the locking bar 19 extending in the direction perpendicular to the paper surface in FIG. Carbide pins 41 are arranged so as to intersect with the front position of the locking bar 19, and when breaking from the front surface 11, the carbide pins 41 are abutted before reaching the locking bar 19, and a hole drilling tool such as a hole saw or a drill is formed. High resistance is given to the vandalism using. Thereby, improvement of crime prevention reliability is achieved.

3 is a cross-sectional view taken along the line AA in FIG.
The outer cylinder cover 35 is integrally formed with a large truncated cone-shaped portion 35c having a substantially truncated cone shape whose tip is a flat surface at the tip of a cylindrical main body 35b having the same inner diameter. The outer cylinder cover 35 is positioned in the direction along the axis G with the rear end surface 35d of the decorative large diameter portion 35c contacting the periphery of the mounting hole 9 of the door 1. A front plate 27 is integrally formed inside the large decorative portion 35c, and the front plate 27 has a central opening hole 25 having a smaller diameter than the main body portion 35b. That is, the outer cylinder 17 inserted from the rear portion 33 of the outer cylinder cover 35 abuts on the front plate 27 and is prevented from coming off from the front side.

  The main body part 35b and the decorative large diameter part 35c are formed, for example, by cutting a tubular metal material. A decorative ring 40 shown in FIG. 1 is attached to the surface of the large-diameter decorative portion 35c that will be exposed to the outdoor surface 1a of the door 1 to form an attractive appearance. In addition, the decorative ring 40 rotatably holds the insertion guide ring 42 shown in FIG. 1 in the leading end concave portion 35e of the decorative large diameter portion 35c.

4 is a cross-sectional view taken along the line BB in FIG.
The pin insertion hole 39 is perforated from the side edge side of the front plate so that the rotation direction b side of the hole saw (not shown) becomes the bottom 39a of the hole. When the cutting edge of the hole saw comes into contact with the carbide pin 41 and the carbide pin 41 is urged in the linear direction a (see FIG. 2) along the pin central axis on the rotation direction b side of the hole saw, The distal end surface of the pin 41 on the moving side comes into contact with the bottom 39a of the hole. That is, it does not move to the opening side of the pin insertion hole 39, and the carbide pin 41 is prevented from coming off from the pin insertion hole 39. Also by this, it is possible to give a high resistance to the vandalism and improve the security reliability.

5 is a cross-sectional view taken along the line CC of FIG.
The outer cylinder cover 35 has a substantially prismatic outer shape on the rear end 33 side, and a plurality of bottomed screw holes 43 into which fixing screws (not shown) are screwed at the respective corner portions are forward from the rear end surface 45 along the axis G. Has been drilled. In the present embodiment, four bottomed screw holes 43 are arranged at an angle of 45 degrees in the circumferential direction. The cylinder lock 100 is fixed with a bottomed screw hole 43 screwed to a bracket (not shown) fixed to the lock box 5 or the like with a fixing screw so that the door 1 is prevented from coming off from the outdoor surface 1a. .

  An auxiliary pin insertion hole 49 having the same center 47 as the bottomed screw hole 43 is formed in the large-diameter decorative portion 35 c which is the front portion of the outer cylinder cover 35. The sub-pin insertion hole 49 is opened at the inclined surface of the decorative large diameter portion 35c. A secondary carbide pin 51 shown in FIG. 2 is press-fitted into the secondary pin insertion hole 49 from the opening. From the front surface 11 side of the outer cylinder cover 35, the outer cylinder cover 35 is broken using a hole saw, or illegally drilled toward the bottomed screw hole 43 using a drill or the like, and screwed into the bottomed screw hole 43. Even if the fixing screw is to be destroyed, the auxiliary carbide pin 51 is interposed in the depth direction at the same center 47 in front of the bottomed screw hole 43, so that the outside of the outer cylinder cover 35 is broken or the bottomed screw hole 43 is reached. It will hit the auxiliary carbide pin 51 before. Thereby, it is possible to prevent the cylinder lock 100 from being pulled out by destroying the fixing screw that is screwed into the bottomed screw hole 43, and in addition to the counter force against the hole saw, it is possible to impart a high counter force against the destructive action by the drill, Security reliability is further improved.

  In the cylinder lock 100 having the above-described configuration, the cemented carbide pin 41 extends in the direction of a straight line 38 connecting both ends of the arc 37 in the inner circumferential circle 35a of the outer cylinder cover 35, and has a larger area for taking out than a hard sphere. Perforation is required, and the time required for destruction increases. Also, compared to a structure in which the carbide pins 41 are obliquely intersected at two places with the cutting circle of the hole saw with respect to one carbide pin 41 and the conventional hard pins are provided in the radial direction, the contact points are scattered. Instead, it is arranged in a substantially linear shape and increases as a contact location. As a result, the hole saw can be made slippery, and the cut surface is increased in the oblique crossing direction, so that the time required for destruction is greatly increased.

  Therefore, according to the cylinder lock 100 described above, both ends of the arc 37 of the inner circumference circle are attached to the outer cylinder cover 35 in which the central opening hole 25 for exposing the keyhole is formed in the front plate 27 and the outer cylinder 17 is mounted from the rear portion 33. A pin insertion hole 39 is provided in the front plate 27 which is perforated in the linear direction a connecting p and q and is excluded from the central opening hole 25, and a carbide pin 41 which is inserted into the pin insertion hole 39 and made of a hard material. Therefore, it is necessary to drill or cut in a large area for taking out compared to a hard sphere, and the time required for destruction can be increased. In addition, the carbide pins 41 always intersect the hole-saw cutting circle at two positions diagonally, and this also increases the time required for the fracture as compared with the conventional structure in which the hard pins are provided in the radial direction. As a result, it is possible to impart a high resistance to the destructive action using the drilling tool and improve the security reliability.

It is a longitudinal cross-sectional view by the surface containing the axis line of the cylinder lock which concerns on this invention. It is the front view which abbreviate | omitted the inner cylinder of the cylinder lock shown in FIG. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Front 13 ... Keyhole 15 ... Inner cylinder 17 ... Outer cylinder 17a ... Outer cylinder outer peripheral surface 19 ... Rocking bar 21 ... Groove 23 ... Projection 25 ... Center opening hole 27 ... Front plate 29 ... Fitting groove 31 ... Inner surface 33 ... rear part 35 ... outer cylinder cover 35a ... inner circumference circle 37 of outer cylinder cover ... arc 39 ... pin insertion hole 39a ... bottom of hole 41 ... carbide pin 43 ... bottomed screw hole 45 ... rear end face 47 ... same center 49 ... Sub pin insertion hole 51 ... Sub carbide pin 100 ... Cylinder lock G ... Axis a ... Linear direction b ... Rotation side of hole saw

Claims (4)

An outer cylinder in which an inner cylinder having a keyhole on the front surface is rotatably provided, a locking bar that protrudes from the inner cylinder toward the outer cylinder so as to be able to restrict the rotation of the inner cylinder, and an outer periphery of the outer cylinder A protrusion having a groove formed on the surface along the axial direction and capable of protruding in the rotation restricting direction of the locking bar, and a central opening hole for exposing the keyhole are provided on the front plate and fitted with the protrusion. A cylinder lock having a fitting groove on the inner surface in a direction along the axis and mounting the outer cylinder from the rear,
A pin insertion hole disposed in the front plate excluding the central opening hole, which is perforated in a linear direction connecting both ends of the arc of the inner circumference of the outer cylinder cover;
Carbide pins that are inserted into the pin insertion holes and made of a hard material;
A cylinder lock characterized by comprising: The cylinder lock according to claim 1,
A cylinder lock, wherein a part of the pin insertion hole is disposed so as to overlap with a front position of the locking bar. A cylinder lock according to claim 1 or 2,
The pin insertion hole is a cylinder lock characterized in that the rotation direction side of the hole saw is the bottom of the hole. The cylinder lock according to any one of claims 1, 2, and 3,
A plurality of bottomed screw holes into which the fixing screws are screwed are formed in the outer cylinder cover along the axis from the rear end surface,
A sub-pin insertion hole having the same center as the bottomed screw hole is formed in the front portion of the outer cylinder cover,
A cylinder lock, wherein a sub-carbide pin is press-fitted into the sub-pin insertion hole.

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