JP2009235903A - Protective structure of cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protective structure of a cylinder lock using a fixed outer cylindrical body for security which cannot be wrenched or is hardly wrenched. <P>SOLUTION: The protective structure of the cylinder lock comprises a cylinder lock 5 with its fitting base end 5a being fitted to a lock box 2, and the other end 5b being projected from a fitting hole 6 in an outer wall surface 1a of a door 1, and a cylinder lock protective cylinder 7A to be fixingly and externally fitted to the cylinder lock 5. The cylinder lock protective cylinder 7A is formed in a truncated pyramidal shape (a truncated conical shape) in which an inner end 7a close to the fitting base end 5a is fitted in the fitting hole 6, and an outer circumferential wall 11 has an inclined surface with its outside diameter being gradually reduced from the inner end 7a to a fore end 7b as the outer circumferential wall 11 leads to a fore end opening on the cylinder lock 5 side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a protective structure for a cylinder lock protruding from a door surface.

  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 (protruding end) 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. For a thief, a tool such as a pliers, a bar, a drill, etc. having a sandwiching portion for seven tools. It is easy to deform the decorative ring 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 in the sign of the broadcast).

JP 2003-120083 A

  The previously proposed lock structure basically consists of a cylinder lock whose mounting base end is attached to the lock box and whose other end protrudes from the mounting hole on the outer wall surface of the door. "Cylinder lock protection structure consisting of a fixed cylinder to be fitted and an outer cylinder for crime prevention to be fitted to this fixed cylinder", but the outer cylinder for crime prevention of this cylinder lock protection structure has an inner end portion. Since the outer peripheral wall is formed in a cylindrical body (in other words, a hollow pipe) from the end face of the tip to the end face of the tip, the thief is one of the seven tools, especially a pliers having a pinch (a kind of pinch, Then, there is still a possibility to grasp the straight outer peripheral wall well and tear off the cylinder lock.

  Therefore, the present invention proposes a protection structure for a cylinder lock using a fixed-type outer cylinder for crime prevention, in which the thief cannot or even easily remove the cylinder lock. This is the object of the invention.

  The protection structure of the cylinder lock according to the present invention includes a cylinder lock 5 having an attachment base end portion 5a attached to the lock box 2 and an other end portion 5b protruding from the attachment hole 6 of the outer wall surface 1a of the door 1, and the cylinder lock. The cylinder lock protection cylinder 7A includes a cylinder lock protection cylinder 7A fixedly and externally fitted to the lock 5. The cylinder lock protection cylinder 7A has an inner end 7a near the attachment base end 5a. 6 and the outer peripheral wall 11 extends from the inner end portion 7a to the tip portion 7b toward the tip opening on the cylinder lock 5 side, and has a truncated cone shape (conical stand) having an inclined surface whose outer diameter gradually becomes smaller. It is characterized by being formed in a shape.

  In the present invention, the mounting base end portion 5 a is attached to the lock box 2, while the other end portion 5 b projects from the mounting hole 6 of the outer wall surface 1 a of the door 1, and the cylinder lock 5 The cylinder lock protection cylinder 7A includes a cylinder lock protection cylinder 7A that is fixedly fitted to the outside. The cylinder lock protection cylinder 7A has an inner end 7a near the attachment base end 5a fitted into the attachment hole 6. Then, from the inner end portion 7a to the tip portion 7b, the outer peripheral wall 11 has a truncated cone shape (conical frustum shape) having an inclined surface whose outer diameter gradually becomes smaller as it reaches the tip opening on the cylinder lock 5 side. Since it is formed, even when trying to catch the outer peripheral wall 11 of the cylinder lock protection cylinder 7A, the clamping part a of the tool T cannot easily catch the outer peripheral wall 11 as shown in FIG. Siri It is not possible to "pick off" the Zehnder tablets 5.

  In particular, the outer peripheral surface 11a of the base end portion of the inner end portions 9a and 7a fitted into the mounting hole 6 of the door 1 of the crime prevention outer cylinder 9 or the cylinder lock protection cylinder 7A is arcuate as it reaches the inner end surface or the rear end portion. 5, the pinching portion a of the tool T cannot grip the inner end face of the crime prevention outer cylinder 9 or the cylinder lock protection cylinder 7A as desired, as shown in FIG. There is an advantage that the lock 5 cannot be “stripped off”.

  Further, in the case of the embodiment including the main part of the present invention as it is and having one or a plurality of protrusions on the outer peripheral wall of the inner end of the cylinder lock protection cylinder 7A, not only the pliers but also the fitting For example, it is possible to cope with a trick that is operated by inserting a pipe.

1 to 5 are explanatory views showing a first embodiment of the present invention. 6 to 11 are explanatory views in which a part of the first embodiment is redesigned. 12 to 17 are explanatory views showing a second embodiment of the present invention. 18 and 19 are explanatory views showing a third embodiment of the present invention. FIG. 20 is an explanatory diagram in which a part of the first embodiment is redesigned.
BRIEF DESCRIPTION OF THE DRAWINGS Schematic cross-sectional explanatory drawing which shows embodiment. The perspective view which shows 1st Example of the outer cylinder for crime prevention. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. Explanatory drawing which tried to catch the outer peripheral wall of the outer cylinder for crime prevention with a tool. FIG. 5 is an explanatory diagram showing that the tool is slippery in FIG. 4. The perspective view which shows the modification of the outer cylinder for crime prevention. FIG. 7 is a cross-sectional view taken along line 7-7 of FIG. The perspective view which shows the other modification of the outer cylinder for crime prevention. FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. 8. The perspective view which shows the schematic cross-section explanatory drawing which shows other embodiment using the fixed type | mold outer cylinder for crime prevention. The perspective view of the outer cylinder for crime prevention of FIG. FIG. 6 is a schematic cross-sectional explanatory view showing a second embodiment of the present invention. The perspective view which shows 2nd Example of this invention. 14-14 schematic cross-sectional explanatory drawing of FIG. The schematic explanatory drawing which carried out the external fitting of the tool to the inner end part of the outer cylinder for crime prevention. Schematic explanatory drawing which shows an example of the fitting state of the outer cylinder for crime prevention and a tool. Schematic explanatory drawing which shows the other example of the fitting state of the outer cylinder for crime prevention, and a tool. Schematic cross-sectional explanatory drawing which shows 3rd Example using the outer cylinder for fixed crime prevention. The perspective view of the outer cylinder for crime prevention of FIG. Explanatory drawing which changed the design of a part of 1st Example.

  Hereinafter, the best mode for carrying out the present invention shown in FIGS. 1 to 5 will be described. First, the main part of the present invention will be described. 1 is a door, 1a is an outer wall surface of the door, 2 is a lock box built in a notch portion of the door 1, 5 is a base end portion 5a attached to the lock box 2, and the other end portion 5b is outside the door 1. A cylinder lock 7 projecting from the mounting hole 6 of the wall surface 1a; 7 is a fixed cylinder which is externally fitted to the cylinder lock 5 and fixed to the cylinder lock 5 via a plurality of pin-shaped stoppers 8.8; Is a crime prevention outer cylinder interposed between the fixed cylinder 7 and the cylindrical decorative ring 10.

  Therefore, the outer cylinder 9 for crime prevention has an inner end portion 9a corresponding to the base portion fitted into the mounting hole 6 corresponding to the thickness of the door 1, and from the inner end portion 9a to the tip end portion 9b. The outer peripheral wall 11 is formed in a truncated cone shape (conical frustum shape) having an inclined surface whose outer diameter gradually becomes smaller as it reaches the tip opening on the cylinder lock 5 side.

  In this embodiment, the outer peripheral surface 11a of the root portion of the inner end portion fitted in the door mounting hole 6 of the crime prevention outer cylinder 9 is formed in an arc shape as it reaches the inner end surface. As a result, not only the outer peripheral wall 11 of the security outer cylinder 9 itself cannot be pinched completely by the pinching portion a of the tool T (see FIG. 4), but the edge of the mounting hole 6 of the door 1 is pry open, It becomes extremely difficult to pinch the base large diameter portion of the crime prevention outer cylinder 9 (see FIG. 5).

  Further, as shown in FIGS. 2 and 3, the inner peripheral wall 12 of the crime prevention outer cylinder 9 is formed with a peripheral groove 13 into which the plurality of pin-shaped stoppers 8.8 described above are engaged.

  Accordingly, the crime prevention outer cylinder body 9 is rotatably fitted to the fixed cylinder 7 via these pin-shaped stoppers 8.8, and is secured from the fixed cylinder 7 by the stoppers 8.8. Extraction is also blocked (locked).

  Next, the main part will be described. The cylindrical decorative ring 10 described above may be solid, but in this embodiment, as shown in FIG. 1, it is formed in a hollow cross section. A biasing spring 15 is provided between the outer peripheral wall 11 of the distal end portion 9 b of the crime prevention outer cylinder 9 and the decorative ring 10 and presses the decorative ring 10 toward the outer wall surface 1 a of the door 1. Reference numeral 16 denotes a front end cover of the cylinder lock, and the front end cover 16 and the fixed cylinder 7 are fixed by a plurality of fixing pins 17.17.

  In addition, the structure of the cylinder lock 5 and the attachment structure to the lock box 2 are not different from the conventional ones. Therefore, although details are omitted, for example, the cylinder lock 5 includes a plurality of obstructions (pins) between the outer cylinder and the inner cylinder. The same is true in that the tumbler is provided and the shear line of the obstacle is aligned on the boundary between the outer cylinder and the inner cylinder when the key is inserted.

  First, a design change example of the first embodiment will be described. In the outer cylinder 9 for crime prevention of the first embodiment, the outer peripheral wall 11 is an inclined surface (including the arc-shaped outer wall surface 11a of the root portion) from the end surface of the inner end portion 9a corresponding to the root portion to the end surface of the distal end portion 9b. Although it is formed in a trapezoidal shape, the outer peripheral wall 11A is slightly arcuate from the end surface of the inner end portion 9a corresponding to the root portion to the end surface of the tip end portion 9b, as in the outer cylinder 9A for crime prevention shown in FIGS. You may form in the shape of a base. In an extreme example, the outer peripheral wall 11A may be formed in a “beer barrel shape”. In short, even if an attempt is made to pinch with the pinching portion a of the pliers as the tool T, it is sufficient that the pinching portion a cannot grip the outer peripheral wall 11.11A and the cylinder lock 5 cannot be peeled off.

  Next, the crime prevention outer cylinder body 9 of the first embodiment is externally fitted to the fixed cylinder 7 through the pin-shaped stopper 8.8 and the circumferential groove 13 so as to be freely rotatable. As shown in the outer cylinder 9B for crime prevention, a plurality of (for example, two) engaging holes 13A. It may be 13A. Therefore, the crime prevention outer cylinder body 9B becomes an outer cylinder body 9B fixed to the fixed cylinder 7 because the pin-shaped stopper 8.8 prevents its rotation.

  Next, in the outer cylinder body 9 for crime prevention of the first embodiment, the fixed cylinder 7 and the outer cylinder body 9 are formed as separate bodies, and both are engaged by a plurality of stoppers 8.8. From the viewpoint of cost reduction, the crime prevention outer cylinder 9 and the fixed cylinder 7 can be made into one component.

  10 and 11, the base end 5a is attached to the lock box 2, while the other end 5b protrudes from the attachment hole 6 of the outer wall surface 1a of the door 1, and the cylinder lock 5 Cylinder lock protection cylinder 7A (one crime prevention outer cylinder body in which the outer cylinder body 9 for security and the stationary cylinder 7 of the first embodiment are integrally formed of metal in advance) which is fixedly fitted to the outside. In the cylinder lock protection cylinder 7A, an inner end 7a near the attachment base end 5a is fitted into the attachment hole 6, and an outer peripheral wall 11 extends from the inner end 7a to the distal end 7b. It is formed in the shape of a truncated cone (conical frustum shape) having an inclined surface whose outer diameter gradually becomes smaller as it reaches the tip opening on the cylinder lock 5 side. If comprised in this way, while the number of parts can be reduced, the same effect as the said 1st Example can be acquired.

  Next, FIGS. 12 to 17 show a second embodiment in which another object is added to the invention of the first embodiment. Hereinafter, in the description of the second embodiment and the like, the reference numerals of the first embodiment are used for convenience in order to avoid redundant description.

  In the second embodiment, a single protrusion 21 is provided on the outer peripheral wall of the inner end 9a of the crime prevention outer cylinder 9C so as to be able to cope with, for example, a crawling trick that is operated by inserting the fitting pipe T1. ing. In the present embodiment, as shown in FIG. 14, the protrusion 21 is provided in a step shape or a bowl shape on a slightly horizontal outer peripheral wall of the inner end portion 9a. Of course, the protrusion 21 does not necessarily have a bowl shape, and may be a plurality of protrusions provided with a required interval in the circumferential direction. In this case, it is desirable to form a plurality of protrusions in, for example, a left and right protrusion type, a positive protrusion type, a radial protrusion type, or the like.

  In the above configuration, when the inner diameter I of the fitting pipe T1 is compared with the outer diameter O of the flange-shaped protrusion 21 of the crime prevention outer cylinder 9C, (1) as shown in FIG. 16, the fitting pipe When the inner diameter I of T1 is smaller than the outer diameter O of the hook-shaped protrusion 21, the end surface 22 of the insertion part of the fitting pipe T1 collides with the hook-shaped protrusion 21, and the crime prevention outer cylinder 9C is Since it is formed in the shape of a truncated cone, there are few sliding contact surfaces between the inner peripheral surface of the insertion portion of the fitting pipe T1 and the outer peripheral surface of the outer cylinder 9C for crime prevention, so that the outer cylinder for crime prevention can be easily performed. The body 9C cannot be pulled out.

  (2) On the other hand, as shown in FIG. 17, when the inner diameter I of the fitting pipe T1 is substantially the same as or larger than the outer diameter O of the hook-shaped protrusion 21, the insertion part of the fitting pipe T1 The end face 22 of the insertion part is externally fitted or loosely fitted so as to be slidably contactable with the bowl-like projection part 21 without colliding with the bowl-like projection part 21, and the inner peripheral surface of the insertion part is the outer circumference of the outer cylinder 9C for crime prevention. Since it does not slide in contact with the surface, it becomes more difficult to pull out the outer cylinder 9C for crime prevention. Therefore, the second embodiment can be applied not only to the pliers T but also to a technique for inserting and operating the fitting pipe T1.

  Next, FIGS. 18 and 19 show a third embodiment in which the object of the second embodiment is added to the invention of a modification of the first embodiment (FIGS. 10 and 11). Therefore, a single protrusion 21 is provided on the outer peripheral wall of the inner end of the cylinder lock protection cylinder 7B of the third embodiment, as in the second embodiment. In addition, about the said projection part 21, in order to avoid the overlapping description, the code | symbol 21 of 2nd Example is used.

  By the way, the outer cylinder 9 for crime prevention of the first embodiment is formed in the shape of a truncated cone with an outer peripheral wall from the inner end portion 9a to the tip end portion 9b. It does not require that the entire wall be a completely inclined surface. For example, like a crime prevention outer cylinder 9D shown in FIG. 20, it is formed in a pan-like shape from at least a portion near the inner end 9a to the tip 9b. You may do it. That is, the outer peripheral surface of the inner end portion 9a may be somewhat horizontal.

  Although the decorative ring 10 is urged against the outer wall surface 1a of the door 1 by the spring force of the urging spring 15, the outer cylinder 9.9A. An essential part of the present invention is that design changes can be freely made such as a flange portion is provided around each end portion of 9B, and the flange portion is rotatably fitted between the flange portion and the outer wall surface 1a of the door 1. It is not (mandatory requirement).

  The present invention is used before a door of a building.

DESCRIPTION OF SYMBOLS 1 ... Door, 1a ... Outer wall surface, 2 ... Lock box, 5 ... Cylinder lock, 6 ... Mounting hole, 7 ... Fixed cylinder, 7A, 7B ... Cylinder protection cylinder (outer cylinder for crime prevention), 8 ... Stopper, 9 , 9A, 9B, 9C, 9D ... Outer cylinder for crime prevention, 7a, 9a ... Inner end, 7b, 9b ... Tip, 10 ... Cylindrical decorative ring, 11, 11A ... Outer wall, 11a ... Outside the root part Wall surface, 12, 12 ... inner peripheral wall, 13 ... peripheral groove, 15 ... biasing spring, 16 ... tip cover, 21 ... projection, T, T1 ... tool, a ... clamping part.

Claims (2)

A cylinder base 5 having an attachment base end portion 5a attached to the lock box 2 and a second end portion 5b protruding from the attachment hole 6 of the outer wall surface 1a of the door 1, and a cylinder fixedly fitted to the cylinder lock. The cylinder lock protection cylinder is composed of a lock protection cylinder 7A, and the cylinder lock protection cylinder has an inner end 7a near the attachment base end inserted into the attachment hole, and the inner end 7a to the tip 7b. The outer peripheral wall 11 is formed in the shape of a truncated cone having an inclined surface whose outer diameter gradually becomes smaller as it reaches the tip opening on the cylinder lock side. Protective structure. 2. The protection structure for a cylinder lock according to claim 1, wherein a protrusion 21 is provided on the outer peripheral wall of the inner end portion of the cylinder lock protection cylinder.

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