JP4420654B2 - Protective structure of cylinder lock - Google Patents

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. Therefore, for thieves, tools such as pliers, bars, drills, etc., which have seven tool clamping portions. 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 base end is attached to the lock box, while the other end protrudes from the mounting hole on the outer wall surface of the door. The cylinder lock protection structure is composed of a fixed cylinder to be joined and an outer cylinder for security that is fitted to the fixed cylinder. However, the outer cylinder for security of the cylinder lock protection structure has an inner end portion. From the end face to the end face of the tip part, the outer peripheral wall is formed in a cylindrical body (so-called hollow pipe) with a horizontal line, so the thief is one of the seven tools, in particular, a pliers (a kind of clip tool) with a clip part. There is still a possibility that the straight outer peripheral wall is grasped well and the cylinder lock is torn off.

  Accordingly, an object of the present invention is to propose a protection structure for a cylinder lock, in which a thief “cannot tear off the cylinder lock further or is difficult”.

The protection structure of the cylinder lock of the present invention includes a cylinder lock 5 having a 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 the cylinder lock. In the protection structure of the cylinder lock comprising the fixed cylinder 7 fitted outside and the crime prevention outer cylinder body 9 fitted outside the fixed cylinder , the crime prevention outer cylinder 9 has an inner end portion 9a. A pan that has an inclined surface that fits into the mounting hole 6 and whose outer diameter gradually becomes smaller as the outer peripheral wall 11 reaches the front end opening on the cylinder lock 5 side from at least the inner end 9a to the front end 9b. The outer cylinder body 9 for crime prevention is fitted to the fixed cylinder 7 via a stopper 8 so as to be rotatable .

In the above configuration, the outer peripheral wall of the inner end portion 9a is provided with a protruding portion 21 protruding outward in the radial direction .

Further, the protection structure of the cylinder lock of the present invention is such that the base end portion 5a is attached to the lock box 2, while the other end portion 5b projects from the attachment hole 6 of the outer wall surface 1a of the door 1, In the protection structure of the cylinder lock comprising the fixed cylinder 7 fitted outside the cylinder lock and the crime prevention outer cylinder 9A fitted outside the fixed cylinder , the crime prevention outer cylinder 9A is provided at the base portion. corresponding inner end portion 9a is fitted in the mounting hole 6, the outer peripheral wall 11A is formed slightly spherical cone shape having an arcuate surface from the inner end face of the inner end portion 9a toward the distal end surface of the distal end portion 9b, outside for-proof offenses The cylindrical body 9A is characterized in that the cylindrical body 9A is rotatably fitted to the fixed cylinder 7 via a stopper 8 .

In addition, it is desirable that the protruding portion that protrudes in the radially outward direction of the outer peripheral wall of the inner end portion 9a has a bowl shape .

In the present invention, the crime prevention outer cylinder 9 or the cylinder lock protection cylinder 7A has an inner end portion 9a. 7a fits into the mounting hole 6, and at least the inner end 9a. 7a to the tip 9b. 7b, 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 , or for crime prevention. the outer cylindrical body 9A, since the outer peripheral wall 11A from the end face of the inner end 9a which corresponds to the root portion toward the end face of the distal end portion 9b is formed slightly spherical cone shape having an arcuate surface, as shown in Figure 4, for example Even if the thief tries to catch the outer peripheral wall 11 of the crime prevention outer cylinder 9 or the cylinder lock protection cylinder 7A while removing the decorative ring 10 using the tip of the tool T or destroying it, the pinching portion a of the tool T Since the outer peripheral wall 11 cannot be completely grasped as shown in FIG. 4, the cylinder lock 5 cannot be easily “stripped”.

  In particular, the inner end 9a... Fitted into the mounting hole 6 of the door 1 of the outer cylinder 9 for the crime prevention or the cylinder lock protection cylinder 7A. When the outer peripheral surface 11a of the root portion of 7a is formed in an arc shape as it reaches the inner end surface or the rear end portion, as shown in FIG. Since the inner end face or the cylinder lock protection cylinder 7A cannot be gripped as desired, there is an advantage that the cylinder lock 5 cannot be "stripped off".

  In the case of the embodiment in which the inner peripheral wall 12 has the circumferential groove 13 as in the case of the crime prevention outer cylinder 9 and is rotatable with respect to the fixed cylinder 7, the effect is that the crime prevention outer cylinder 9 is easily slipped. In addition, because the outer cylinder 9 for crime prevention rotates together with the ease of catching, etc., it becomes much more difficult to catch the outer peripheral wall 11.11A of the cylinder lock 5 with the tool T, and the crime prevention effect is great. .

  Furthermore, in the case of an embodiment that includes the main part of the present invention as it is and is provided with one or a plurality of protrusions on the outer peripheral wall of the inner end part of the crime prevention outer cylinder 9 or the cylinder lock protection cylinder 7A, Not only the pliers, but also, for example, a trick that is operated by inserting a fitting pipe can be handled.

  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 an outer cylinder for crime prevention 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 sandwich the large diameter portion of the base 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 arcuate 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 arc-shaped 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.

  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-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 security 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 extending 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.

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 embodiment using the outer cylinder for crime prevention. The perspective view which shows the modification of the outer cylinder for crime prevention. 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 showing a third embodiment of the present invention. The perspective view of the principal part (cylinder lock protection cylinder 7B) of 3rd Example. Explanatory drawing which changed the design of a part of 1st Example.

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 part, 10 ... cylindrical decorative ring, 11.
DESCRIPTION OF SYMBOLS 11A ... Outer peripheral wall, 11a ... Outer wall surface of root part 12.12 ... Inner peripheral wall, 13 ... Circumferential groove, 15 ... Biasing spring, 16 ... End part cover, 21 ... Protrusion, T, T1 ... Tool, a ... Pinch Department.

Claims (3)

The base end 5a is attached to the lock box 2, while the other end 5b is protruded from the attachment hole 6 of the outer wall surface 1a of the door 1, and the fixed cylinder 7 is fitted outside the cylinder lock. this fixed tube at the protective structure of the cylinder lock comprising a security purpose outer tubular member 9 for the outer fitting, the crime prevention outer cylindrical body 9, the inner end portion 9a is fitted in the mounting hole 6, at least the As the outer peripheral wall 11 reaches from the inner end portion 9a to the distal end portion 9b to the distal end opening on the cylinder lock 5 side, it is formed in a truncated cone shape (conical truncated cone shape) having an inclined surface whose outer diameter gradually becomes smaller, The cylinder lock protection structure, wherein the crime prevention outer cylinder body 9 is rotatably fitted to the fixed cylinder 7 via a stopper 8 .
2. The protection structure for a cylinder lock according to claim 1, wherein the outer peripheral wall of the inner end portion 9a is provided with a protruding portion 21 projecting radially outward .
The base end 5a is attached to the lock box 2, while the other end 5b is protruded from the attachment hole 6 of the outer wall surface 1a of the door 1, and the fixed cylinder 7 is fitted outside the cylinder lock. In the protective structure of the cylinder lock comprising the outer cylinder 9A for security that is fitted outside the fixed cylinder , the outer cylinder 9A for security has an inner end 9a corresponding to the root portion in the mounting hole 6. The outer peripheral wall 11A is formed in a slightly spherical shape having an arcuate surface from the inner end surface of the inner end portion 9a to the distal end surface of the distal end portion 9b, and the outer cylinder 9A for crime prevention is A protective structure for a cylinder lock, characterized in that it is rotatably fitted to the fixed cylinder 7 .

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