JP4411129B2 - Protective structure of cylinder lock - Google Patents

Description

  The present invention relates to a protection structure for a cylinder lock protruding from a door surface, and more particularly to a protection structure for a cylinder lock adapted to a measure for horsor destruction.

  Generally, a cylinder lock is generally mounted in a decorative ring and a cylinder cylinder (fixed cylinder), and is attached to the lock box so that the other end (front end side) protrudes from the outer wall surface of the door.

  The decorative ring is a thin-plate-shaped cylinder made of sheet metal, and has a hollow portion. Therefore, for thieves, tools such as pliers, bars, drills, etc. that have seven tool pinching portions It is easy to deform or destroy a decorative ring or the like using

Therefore, for example, it is possible to forcibly “break” or “strip off” the fixed cylinder and the cylinder lock together with the decorative ring by using a pliers in which the thief has a sandwiching portion.
Therefore, the applicant has proposed a lock structure in which the decorative ring and the fixed cylinder are improved so that the cylinder lock is not torn off by prying off the decorative ring and applying a large external force to the cylinder lock with the outer peripheral wall exposed (Patent Document). 1).

  The embodiment described in this publication is “attached to the inner periphery of the fixed cylinder 43, and the base end of the fixed cylinder 43 is attached to the lock box provided in the door through the lock insertion hole formed in the door surface. A fixed conical decorative ring 67 having an opening at the front end side is externally attached to the outer periphery on the front end side of the fixed cylinder 43 that is fixed and protrudes from the door surface so that the front end portion is the front end side of the fixed cylinder 43, Further, in the lock structure in which the rear end portion of the decorative ring 67 is brought into contact with the door surface by the urging force of the urging means 73 externally attached to the fixed cylinder 43, the fixed cylinder 43 is connected to the cylinder lock 31. The inner fixed cylinder 45 is engaged with the outer fixed cylinder 47 rotatably attached to the outer periphery of the inner fixed cylinder 45, and the cylinder lock 31 is interposed via the inner fixed cylinder 45. And the decorative ring 67 is engaged with the outer periphery of the outer fixed cylinder 47 ( As it is described), "the sign of the broadcast.

  By the way, in recent years, while strengthening of security measures for locks is desired, measures for horsor destruction are also regarded as important. Holsor destruction is a method of attaching a "horsor (circulating blade that rotates in the circumferential direction)" to the tip of the drill, and cutting the front wall of the front decorative plate that covers the tip of the cylinder lock annularly or the front wall of the fixed cylinder in a coin shape. In other words, it is a frontal attack against a cylinder lock.

Therefore, for example, not only the embodiment of FIG. 6 described in Patent Document 1, but also the lock structure described in Patent Document 1, it is necessary to take sufficient measures to destroy Horso.
JP 2003-120083 A JP 2003-239582 A Japanese Patent Laid-Open No. 2001-20568 JP 2001-12119 A

  The first object of the present invention is that even if a thief attaches a hole saw to the tip of the drill and attacks the cylinder lock from the front, the cylinder lock cannot be easily broken. A second object of the present invention is to make it easier for the slide protection plate to rotate with the horusoe. Furthermore, it is an additional object of the present invention to reinforce the structure of the front end decorative plate that covers the front end of the cylinder lock via a fixed cylinder.

The protection structure of the cylinder lock of the present invention includes a fixed cylinder that is externally fitted to the cylinder lock and has a fixing portion fixed to a lock box attached to the door, and a cylindrical decorative ring that is externally fitted to the fixed cylinder And a protective structure for a cylinder lock including a cylindrical tip decorative cover fixed to the tip of the fixed cylinder so as to cover the annular front wall of the fixed cylinder. A cutting blade 28b of a horusoe 28 that has cut out and entered the front wall portion 21b of the front end portion decorative cover between the front surface of the annular front wall portion 7b and the inner surface of the front wall portion 21b of the front end portion decorative cover 21, A flat and donut-shaped hard slide protection plate 25 that rotates together with the hole saw 28 when it hits the front surface is provided.

(1) Even if a thief attaches a hole saw to the tip of the drill and attacks the cylinder lock from the front, the cylinder lock cannot be easily broken because the hard slide protection plate rotates.
(2) In the invention according to claim 2, since the cutting blade 28b meshes with the engaging portion, the hard slide protection plate easily rotates.
(3) In the invention described in claim 3, the tip decorative cover does not protrude from the protruding tip of the cylinder lock.
(4) The invention according to claim 4 can reinforce the front end decorative plate.

  An embodiment of the present invention will be described with reference to FIGS. First, the main part of the present invention will be described together with the environmental member, but illustration and description are omitted for detailed matters.

(1) Environment for Implementing the Invention FIG. 1 is a schematic explanatory diagram showing the environment for implementing the invention. In FIG. 1, 1 is a door, 1a is an outer wall surface of the door, 2 is a lock box housed in a notch portion of the door 1, 5 is a base end portion 5a attached to the lock box 2, while the distal end side A cylinder lock 5b protrudes from the mounting hole 6 of the outer wall surface 1a of the door 1, and a cylinder lock 5 is fitted to the cylinder lock 5 and is connected to the cylinder lock 5 via one or more pin-like stoppers (not shown). Fixed cylinders 10 and 10 are cylindrical decorative rings that are extrapolated to the fixed cylinder 7 directly or indirectly (for example, a hard outer cylinder for crime prevention, a rotating body for crime prevention, etc.).

(2) Configuration of the cylinder lock 5 and the fixed cylinder 7 First, the configuration of the cylinder lock 5 and the fixed cylinder 7 will be briefly described. The cylinder lock 5 includes an outer cylinder body 11 and an inner cylinder body 12, and the inner cylinder body 12 has a key insertion hole. The cylinder lock 5 includes a plurality of movable obstacles. When the inner key body 12 is rotated by a predetermined amount by inserting a key into the key insertion hole, the obstacles move and the so-called shear line coincides. The driving force of the inner cylinder 12 is appropriately transmitted to the lock / unlock mechanism of the lock box via the output shaft (tail piece) 13. Further, the cylinder lock 5 is substantially built in the fixed cylinder 7 via a spacer (not shown) (except for a part of the tip of the inner cylinder 12), and via a ring-shaped liner, a stop ring 14 and the like (not shown). Therefore, it is restricted from moving in the axial direction. Further, the inner wall of the fixed cylinder 7 has a long groove in the axial direction, and the protrusion of the outer cylinder 11 is engaged with the long groove, thereby preventing the rotation of the cylinder lock 5 in the circumferential direction.

  In general, the fixing cylinder 7 generally has a pair of protruding fixing parts 7a. 7a is fixed. The fixing portion 7a has a through hole into which a fixing rod can be inserted from the door end side. In addition, an annular front wall 7 b that faces the front surface of the outer cylinder 11 is provided around the front end of the fixed cylinder 7. A part (protruding tip) 12a of the tip of the inner cylinder 12 is fitted in the center hole of the annular front wall 7b. Further, a plurality of (for example, four) fixing recesses 15 are formed at a distal end portion of the fixed cylinder peripheral body portion 7c with a required interval in the circumferential direction.

(3) Tubular decorative ring 10
Next, the cylindrical decorative ring 10 will be described. The tubular decorative ring 10 may be solid, but in this embodiment, as shown in FIG. 1, it is formed in a hollow cross section. The fitting hole 16 inside the cylindrical decorative ring 10 has a slightly smaller diameter than the inner cylindrical wall 17. Therefore, a biasing spring 18 that presses the decorative ring 10 against the outer wall surface 1 a of the door 1 is provided in the gap between the inner wall surface of the inner cylindrical wall 17 and the outer peripheral wall on the distal end side of the fixed tube 7. Yes. The biasing spring 18 can be replaced with a plurality of ring-shaped spacers. Therefore, the cylindrical decorative ring 10 is slightly movable in the axial direction so that the opening end surface with the enlarged diameter can be pressed (or closely adhered) to the outer wall surface 1 a of the door 1. Furthermore, the cylindrical decorative ring 10 is formed by cutting a metal plate, and for example, an external cylindrical wall 20 is formed in a trapezoidal cross section. In addition, the cylindrical decorative ring 10 is rotatably fitted to the fixed cylinder.

(4) Tip decorative cover 21
Reference numeral 21 denotes a cylindrical tip decorative cover for the cylinder lock 5 and the fixed cylinder 7, and this tip decorative cover 21 is provided between the tip of the fixed cylinder 7 and the inside of the cylindrical decorative ring 10 as shown in FIG. 1. A cylindrical wall portion 21a that fits into a narrow annular gap set between the cylindrical wall 17 and an annular shape that is continuous with the cylindrical wall portion 21a and into which the protruding tip 12a of the cylinder lock 5 is fitted. A reinforcing cylinder 22 formed of a hard material and formed in a short cylindrical shape is integrally provided on the inner peripheral wall of the cylindrical wall portion 21a. In the present embodiment, the double cylindrical tip decorative cover 21 is “crimped and fixed” to the fixed cylinder 7 using the fixing recess 15 of the fixed cylinder 7 described above.

(5) Hard slide protection plate 25
Reference numeral 25 denotes a slide defense plate formed in a coin (for example, a 5-yen coin) shape or a donut shape. The slide defense plate 25 is carburized and tempered. The form of the hard slide protection plate 25 is not particularly limited.

  As described above, the object of the present invention is to prevent the horusaw destruction, the slide protection plate 25 can be rotated together with the horusoe, and is fitted to the projecting tip portion 12a of the cylinder lock 5, and the fixed cylinder. 7 is interposed between the annular front wall portion 7b and the annular front wall portion 21b of the front end decorative cover 21, the hard slide protection plate 25 of this embodiment is a relatively thin (flat) donut. It is formed into a shape. Of course, the slide protection plate 25 may have a certain thickness and may be formed in a floating ring shape, for example.

  Thus, 26 is a shaft hole that fits into the protruding tip 12a of the cylinder lock 5, and 27 is one or a plurality of engagements formed so that the cutting blade 28b of the hole saw 28 engages with the vertical wall (at least the surface). Part (in this embodiment, four engagement holes, engagement grooves, etc.).

(6) Rotation of Hard Slide Defense Plate A case where the slide defense plate 25 rotates will be described with reference to FIG. As shown in FIG. 8, the holsaw 28 has, for example, a rotary shaft 28a attached to the tip of a drill (not shown) and a circumferential cutting blade 28b provided at the tip of the rotary shaft 28a.

  Therefore, it is assumed that the thief has now attacked the front using the hard hole saw 28 in an attempt to illegally unlock the cylinder lock. Since the cutting blade 28b of the hole saw 28 rotates in the circumferential direction, a part of the annular front wall portion 21b of the front end decorative cover 21 that is a thin metal plate is cut off. However, even if a portion around the fitting hole (around the fitting hole) of the annular front wall portion 21b is cut off, the remaining portion of the annular front wall portion 21b remains. While being fixed to the fixed cylinder 5 as it is, the remaining portion of the annular front wall portion 21 b serves as a stopper for the slide protection plate 25. That is, the hard slide protection plate 25 cannot be removed from the front end decorative cover 21.

  Next, since the cutting blade 28b of the hard hole saw 28 abuts against the hard slide protection plate 25, the slide protection plate 25 slides and rotates on the front wall portion 7b of the fixed cylinder 5 together with the hole saw 28 while being pressed against the cutting blade 28b. In particular, in this embodiment, since the cutting blade 28 b easily engages with the engagement hole 27, the slide protection plate 25 rotates smoothly through the shaft hole 26.

  Therefore, the cylinder lock 5 is protected as much as possible from the attack of the hard hole saw 28 through the hard slide protection plate 25. Therefore, the thief cannot remove the cylinder lock 5 from the fixed cylinder 5.

  In the examples shown in the embodiment of the invention, a doughnut-shaped one is shown as an example of the hard slide protection plate, but an incomplete donut shape (having a notch of an arbitrary shape in the radial direction from the shaft hole 26) Stuff). In short, it suffices if the front wall portion 7b of the fixed cylinder 7 and the front wall portion 21b of the front end decorative cover 21 are rotatably interposed.

  The present invention is mainly used in the joinery and lock industry.

1 to 8 are explanatory views showing the best embodiments of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS Schematic cross-sectional explanatory drawing which shows embodiment. Perspective view. Explanatory drawing from the right side partly cut away. FIG. The front view of the principal part (hard slide defense board). FIG. 6 is a sectional view taken along line 6-6 of FIG. Explanatory drawing which shows the relationship of the member which comprises the principal part. Explanatory drawing which shows the case where the principal part rotates.

DESCRIPTION OF SYMBOLS 1 ... Door, 2 ... Lock box, 5 ... Cylinder lock, 5a ... Base end part, 5b ... Tip part, 7 ... Fixed cylinder, 7a ... Fixed part, 7b ... Annular front wall part, 10 ... Cylindrical decorative ring, 11 ... outer cylinder, 12 ... inner cylinder, 12a ... protruding tip, 16 ... fitting hole, 17.20 ... cylindrical wall, 21 ... tip decorative cover, front wall 21b, 21a ... cylindrical wall, 21b ... Front wall portion, 22 ... Reinforcing cylinder, 25 ... Hard slide protection plate, 26 ... Shaft hole, 28 ... Horso, 28b ... Cutting blade 29

Claims (3)

A fixed cylinder that is externally fitted to the cylinder lock and has a fixed portion fixed to a lock box attached to the door, a cylindrical decorative ring that is externally fitted to the fixed cylinder, and an annular front wall portion of the fixed cylinder In the protection structure of the cylinder lock provided with a cylindrical tip decorative cover fixed to the tip of the fixed cylinder so as to cover the front, the front surface of the annular front wall 7b of the fixed cylinder 7 and the tip When the cutting blade 28b of the horusoe 28 that has been cut out and invaded between the inner surface of the front wall portion 21b of the front decorative cover 21 and hitting the front surface of the front end decorative cover 21b rotates with the horusoe 28 A protective structure for a cylinder lock, characterized in that a flat and donut-shaped hard slide protection plate 25 is provided.
2. The protection structure of a cylinder lock according to claim 1, wherein the hard slide protection plate 25 has an engaging portion that meshes with the cutting blade 28b on a vertical wall.
2. The protection structure for a cylinder lock according to claim 1, wherein a reinforcing cylinder 22 is integrally provided on the inner peripheral wall of the cylindrical wall portion 21a of the tip decorative cover 21.

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