JP4289663B2 - Protective structure of cylinder lock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a protective structure for a cylinder lock protruding from a door surface.
[0002]
[Prior art]
Generally, a cylinder lock is generally mounted in a decorative ring and a cylinder tube (fixed tube), and is fixedly attached to the lock box so that the other end (projecting end) protrudes from the outer wall surface of the door.
[0003]
The tip of the inner cylinder (driving body) having a key insertion hole for the cylinder lock is usually exposed so that it can be generally seen from the outside because of the necessity to insert a key. In addition, the decorative ring is a thin-plate-shaped cylinder made of sheet metal and has a hollow portion, so that a thief has pliers, burls, drills, and the like that have seven tool sandwich portions. It is easy to deform the decorative ring using this tool.
[0004]
As a countermeasure against the latter, the applicant proposed a lock structure with an improved decorative ring and fixed cylinder so that the cylinder lock could not be removed by prying off the decorative ring and applying a large external force to the cylinder lock with the outer peripheral wall exposed. (Unexamined-Japanese-Patent No. 2003-120083).
[0005]
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). "
[0006]
[Problems to be solved by the invention]
The previously proposed lock structure basically consists of a cylinder lock in which the base end is directly or indirectly 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 comprising a fixed cylinder that is externally fitted to the cylinder lock and an outer cylinder for crime prevention that is interposed between the fixed cylinder and the cylindrical decorative ring. Because the tip of the inner cylinder with the exposed surface is exposed to the outside, the thief may destroy the cylinder from its inner cylinder using one of seven tools, such as a drill called a concrete drill or a carbide drill. was there.
[0007]
Further, since the outer cylinder for crime prevention is formed in a cylindrical body (in other words, a hollow pipe) having an outer peripheral wall extending from the end face of the inner end portion to the end face of the tip end portion, the thief particularly has a pliers ( There was still a possibility that the straight outer peripheral wall was grasped well and the cylinder lock was torn off using a pinch).
[0008]
Therefore, the main object of the present invention is to prevent the thief from breaking the cylinder from the inner cylinder portion using the drill as described above. Moreover, when a thief puts a force in a drill, an idling protection cover is idling stably and easily. Furthermore, the idling protection cover itself is not easily removed from the fixed cylinder or the crime prevention outer cylinder. In addition, a secondary object of the present invention is to propose a protective structure for the cylinder lock which is very difficult for a thief to tear off the cylinder lock using a pliers.
[0009]
[Means for Solving the Problems]
The protection structure of the cylinder lock of the present invention includes a cylinder lock 5, a fixed cylinder 7 that is externally fitted to the cylinder lock, a rotary cylinder that is rotatably fitted to the fixed cylinder, and the fixed cylinder and the cylindrical decorative ring 10. In the protection structure of the cylinder lock in which the outer cylinder 9 for crime prevention interposed between the two is protruded from the outer wall surface of the door, the outer end of the cylinder lock 5 and the protruding end 20b of the inner cylinder 20 are externally attached. An idling protection cover 25 supported so as to be able to idle by a drill operation in a fitted state is provided, and the idling protection cover is locked to an annular wall portion 27 provided around the distal end portion of the fixed cylinder. And a flange portion 28 having a fitting recess 31 for an inner cylinder into which the protruding tip portion of the inner cylinder is fitted, and a fitting hole that is continuous with the flange portion and forms the annular wall portion of the fixed cylinder. projecting distal portion of the fitted, and the inner tube 20 Characterized in that a cover portion 30 and having a key insertion for mouth 26 while covering the front end face of the 0b.
[0010]
Further, the protection structure of the cylinder lock according to the present invention is such that the cylinder lock 5 and the crime prevention outer cylinder body 9A which is externally fitted to the cylinder lock and interposed between the cylinder lock and the cylindrical decorative ring 10 are respectively doors. In the protection structure of the cylinder lock protruding from the outer wall surface of the cylinder lock, the cylinder lock 5 can be idled by a drill operation in a state where the cylinder lock 5 is externally fitted to the protruding tip 20b of the inner cylinder 20. A supported idling protection cover 25 is provided, and the idling protection cover is locked to an annular wall portion 27A provided around the tip of the crime prevention outer cylinder, and the protruding tip 20b of the inner cylinder 20 is fitted. A flange portion 28 to be connected to the flange portion 28, the flange portion 28 being connected to the flange portion, and fitted into a fitting hole forming the annular wall portion of the crime prevention outer cylinder body, and covering the tip end surface of the protruding tip portion of the inner cylinder opening for the key insertion as well as Characterized in that it consists of a cover portion having a 26.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described with reference to FIGS. First, the main part of the present invention will be described. Reference numeral 1 denotes a door, 1a denotes an outer wall surface of the door, 2 denotes a lock box built in a notch portion of the door 1, 5 denotes a base end portion 5a attached directly or indirectly to the lock box 2, while the other end portion 5b Is a cylinder lock that protrudes from the mounting hole 6 of the outer wall surface 1a of the door 1, 7 is a fixed cylinder that fits outside the cylinder lock 5, and 8.8 is a guide function that is inserted into a through-hole 4 formed in the fixed cylinder 7. A pin-shaped stopper 9 having a rim is a crime prevention outer cylinder interposed between the fixed cylinder 7 and the cylindrical decorative ring 10.
[0012]
Note that a rear end portion of the fixed cylinder 7 has a pair of protrusions 7a. 7a is provided. Further, a circumferential groove is formed in the inner peripheral wall of the fixed end portion of the fixed cylinder 7, and a regulating ring 3 for the cylinder lock 5 is fitted in the circumferential groove.
[0013]
FIG. 3 is an explanatory view of the outer cylinder 9 for crime prevention. The outer cylinder body 9 for crime prevention has an inner end portion 9a corresponding to the root portion fitted into the mounting hole 6 of the door 1 corresponding to the thickness of the door 1, and the outer peripheral wall 11 extending from the inner end portion 9a to the tip end portion 9b. Is formed in the shape of a truncated cone.
[0014]
In this embodiment, the outer peripheral surface 11a of the root portion of the inner end portion 9a fitted into 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 completely clamped by the clamping part of the tool, but also 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 root.
[0015]
Further, as shown in FIG. 1, a circumferential groove 13 is formed in the inner peripheral wall 12 of the crime prevention outer cylinder 9 so as to engage the plurality of pin-shaped stoppers 8.8 described above.
[0016]
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).
[0017]
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 decorative cover, and the front end decorative cover 16 and the fixed cylinder 7 are fixed by a plurality of fixing pins 17.17.
[0018]
Next, the structure of the cylinder lock 5 will be briefly described. The cylinder lock 5 has the projection 7a. It is fixed to the lock box 2 via 7a. As shown in FIG. 2, the cylinder lock 5 includes an inner cylinder 20 and an outer cylinder 21 that is externally fitted to the inner cylinder 20.
[0019]
The inner cylinder 20 is a drive body (drive shaft) having a key insertion hole 22 for key combination. Therefore, an engagement member 23 that engages with the mechanism portion of the lock box 2 is provided at the rear end portion 20a of the inner cylinder 20 as a driving body. The engaging member 23 protrudes from the rear end surface 21 a of the outer cylinder 21.
[0020]
On the other hand, the distal end portion 20 b of the inner cylinder 20 of the present embodiment protrudes from the distal end surface 21 b of the outer cylinder 21. The cylinder lock 5 is provided with a plurality of obstacles (pin tumblers) between the inner cylinder 20 and the outer cylinder 21. Although not particularly illustrated, the shear line of the obstacle is formed by inserting a key into the key insertion port 26 of the idling protection cover 25 and the key insertion hole 22 of the inner cylinder 20 which are main parts of the present invention. Align on the boundary with the inner cylinder 20.
[0021]
Reference numeral 25 denotes an idling protection cover that is provided at the tip of the cylinder lock 5 and has a key insertion port 26 that can coincide with the key insertion hole 22 of the inner cylinder 20 of the cylinder lock. The idling protection cover 25 includes a flange portion 28 that is engaged with an annular wall portion 27 that is provided around the distal end portion 7 b of the fixed cylinder 7 described above, and protrudes continuously from the flange portion 28. And a short cylindrical cover portion 30 which is fitted in the fitting hole 29 forming the annular wall portion 27 and has the key insertion port portion 26.
[0022]
The short cylindrical cover part 30 has a smaller diameter than the disk-like flange part 28. Further, the key insertion port 22 is large enough to receive a keyed blade, and is formed in, for example, a small long square shape. As shown by an arrow A in FIG. 2, the idling protection cover 25 is inserted from the rear end opening of the fixed cylinder 7, and the short cylindrical cover portion 30 is formed so that the flange portion 28 is locked to the annular wall portion 27. It fits into the fitting hole 29 of the fixed cylinder.
[0023]
Therefore, although the front surface of the idling protection cover 25 is exposed from the tip portion 7b of the fixed cylinder 7, the remaining portions (the outer peripheral wall of the cover portion 30 and the outer peripheral wall of the flange portion 28) are provided on the tip portion 7b of the fixed cylinder 7. Will be dressed.
[0024]
Further, the idling protection cover 25 of the present embodiment is fitted to the protruding tip 20b of the inner cylinder 20 of the cylinder lock 5 so that it can be stably and smoothly rotated (idled) by a drill operation . That is, the idling protection cover 25 communicates with the flange portion 28 with the key insertion port 26 and is a fitting recess for the inner cylinder front end portion 21 b protruding from the front end surface 21 b of the outer cylinder 21 of the cylinder lock 5. 31 is formed.
[0025]
By the way, the idling protection cover 25 is called a concrete drill and is formed by quenching carbon steel so as to be able to compete with a drill or a carbide drill.
In the above configuration, as shown in FIG. 10, even if the thief tries to destroy the tip portion of the inner cylinder 20 of the cylinder lock 5 using the drill T, the idling protection cover 25 is present. 25, so if the thief presses the drill T against the front surface of the idling protection cover 25 as shown in FIG. 10, the idling protection cover 25 is indicated by an arrow through the flange portion 28. Therefore, the key insertion hole 22 of the inner cylinder 22 cannot be easily attacked.
[0026]
On the other hand, as shown in FIG. 11, the thief is a tip a. Even when trying to catch the outer peripheral wall 11 of the outer cylinder 9 for crime prevention while removing the decorative ring 10 by using a, or destroying the decorative ring 10, the pinching portion a. Since a cannot completely capture the outer peripheral wall 11, the cylinder lock 5 cannot be easily “stripped”.
[0027]
In particular, when the outer peripheral surface 11 of the root portion of the inner end portion 9a inserted into the attachment hole 6 of the door 1 of the crime prevention outer cylinder 9 is formed in an arc shape toward the inner end surface, the tool T1 Clip part a. a has an advantage that the cylinder lock 5 cannot be “further removed” because the inner end face of the crime prevention outer cylinder 9 cannot be grasped.
[0028]
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, since the outer cylinder 9 for crime prevention rotates together with the ease of catching and the like, it becomes much more difficult to catch the outer peripheral wall 11 of the cylinder lock 5 with the tool T1, and the crime prevention effect is great.
[0029]
Next, a second embodiment of the present invention will be described with reference to FIGS. The second embodiment is obtained by limiting (adding) additional requirements to the first embodiment. Therefore, the same configuration / function is denoted by the same reference numeral, and redundant description is omitted.
[0030]
In the second embodiment, the requirement added to the first embodiment is that “to obtain a click feeling” of the idling protection cover 25, the protruding tip portion 20 b of the inner cylinder 20 has a flange of the idling protection cover 25. A click means 35 having a click ball 33 that presses against the inner peripheral wall 31a of the fitting recess 31 of the portion 28 and a click spring 34 that biases the click ball in the press contact direction is provided. A pair of click means 35 is provided above and below the flange portion 28 in this embodiment. In addition, the protruding end portion 20b of the inner cylinder 20 is formed with a storage hole 36.36 for the click means 35 in the radial direction, and the inner peripheral wall 31a of the fitting recess 31 of the flange portion 28 has a predetermined hole. A small engagement groove 37 with which the click ball 33 is engaged at the position is formed.
[0031]
【Example】
Here, a design change example of the first embodiment (this will be referred to as “third embodiment” for convenience of description) will be described. In the crime prevention outer cylinder 9 of the first embodiment, the fixed cylinder 7 and the outer cylinder 9 are formed separately, and both members are integrally engaged via a stopper 8.8. From the viewpoint of cost reduction, both members 7.9 may be integrally formed by quenching carbon steel.
[0032]
That is, in FIG. 15, the base end 5 a is attached to the lock box 2, while the other end 5 b protrudes from the attachment hole 6 of the outer wall surface 1 a of the door 1 and is fixed to the cylinder lock 5. Cylinder lock protective cylinder 9A (a single crime prevention outer cylinder in which the outer cylinder 9 and the fixed cylinder 7 of the first embodiment are integrally formed in advance with a metal) that is fitted outside the cylinder lock protection cylinder 9A In the cylinder lock protection cylinder 9A, the inner end 9a near the attachment base end 5a is fitted into the attachment hole 6, and the outer peripheral wall 11 is an inclined surface from the inner end 9a to the front end 9b. It is formed in a trapezoid shape.
[0033]
Therefore, in the third embodiment, the cylinder lock 5 and the outer cylinder 9A for crime prevention interposed between the cylinder lock and the cylindrical decorative ring 10 are respectively protruded from the outer wall surface 1a of the door 1. An idling protective cover 25 that has a protective structure and has a key insertion port 26 that can be aligned with the key insertion hole 22 of the inner cylinder 20 of the cylinder lock at the tip (other end) 5b of the cylinder lock 5. The idling protection cover 25 is provided with a flange portion 28 that is engaged with an annular wall portion 27A that is provided around the front end portion 9b of the crime prevention outer cylinder 9A, and is connected to the flange portion 28. The cover portion 30 is fitted into the fitting hole 29A forming the annular wall portion 27A of the crime prevention outer cylinder body and has the key insertion port portion 26. Even if comprised in this way, the same effect as 1st Example can be acquired.
[0034]
【The invention's effect】
As is clear from the above description, in the present invention, the tip of the cylinder lock is provided with an idling protection cover having a key insertion port portion that can match the key insertion hole of the inner cylinder of the cylinder lock. The idling protection cover includes a flange portion that is engaged with an annular wall portion that is provided around the distal end portion of the fixed cylinder, and a fitting that is continuous with the flange portion and that forms the annular wall portion of the fixed cylinder. Since it consists of the cover part which fits in the joint hole and has the key insertion port part, it is possible to prevent the thief from breaking the cylinder from the inner cylinder part using a drill. In addition, the flange portion of the idling protection cover communicates with the key insertion port, and a fitting recess for the inner cylinder that protrudes from the tip surface of the outer cylinder of the cylinder lock is formed. When force is applied, the idling protection cover is guided to the projecting tip portion of the inner cylinder and is idling stably and easily. Furthermore, in the case of the embodiment in which the click means having the click ball that presses the inner peripheral wall of the fitting recess of the flange portion is provided at the protruding tip portion of the inner cylinder of the cylinder lock, when inserting the key Based on the click feeling, the key insertion port of the idling protection cover can be aligned with the key insertion hole of the inner cylinder of the cylinder lock. In addition, in the case of the embodiment in which the outer cylinder for crime prevention is inserted into the mounting hole of the door at the inner end, and the outer peripheral wall is formed in a truncated cone shape at least from the inner end to the tip. It is very difficult for a thief to tear off a cylinder lock using a pliers.
[Brief description of the drawings]
1 to 11 are explanatory views showing a first embodiment of the present invention. 12 to 14 are explanatory views showing a second embodiment of the present invention. FIG. 15 is a schematic cross-sectional explanatory view showing a design change example of the first embodiment.
FIG. 1 is a schematic cross-sectional explanatory view showing an embodiment of a first example.
FIG. 2 is an explanatory diagram showing a relationship between a cylinder lock, a fixed cylinder, and an idling protection cover.
FIG. 3 is a perspective view showing an example (first embodiment) of an outer cylinder for crime prevention.
FIG. 4 is an explanatory view of the relationship between the fixed cylinder and the idling protection cover as seen from the back side.
FIG. 5 is an explanatory view of a partial break when the relationship between the fixed cylinder and the idling protection cover is viewed from the front side.
FIG. 6 is an explanatory diagram showing a relationship between an idling protection cover and a cylinder lock.
FIG. 7 is a front view of an idling protection cover.
8 is a cross-sectional view taken along line 8-8 in FIG.
9 is a cross-sectional view taken along line 9-9 in FIG.
FIG. 10 is an explanatory view when a cylinder lock is to be destroyed with a tool T.
FIG. 11 is an explanatory view of trying to capture the outer peripheral wall of the crime prevention outer cylinder with the tool T1.
FIG. 12 is a schematic cross-sectional explanatory view showing an embodiment of a second example.
FIG. 13 is an explanatory view showing the relationship between the idling protection cover and the cylinder lock.
FIG. 14 is a schematic explanatory diagram of click means.
FIG. 15 is a schematic cross-sectional explanatory view showing a design change example of the first embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Door, 1a ... Outer wall surface, 2 ... Lock box, 3 ... Restriction ring, 5 ... Cylinder lock, 6 ... Mounting hole, 7 ... Fixed cylinder, 7a ... Projection part, 7b ... Tip part, 8 ... Stopper, 9 .9A ... Outer cylinder for crime prevention, 7a. 9a ... inner end, 7b. DESCRIPTION OF SYMBOLS 9b ... Tip part, 10 ... Cylindrical decorative ring, 11 ... Outer peripheral wall, 11a ... Outer wall surface of root part, 12 ... Inner peripheral wall, 13 ... Circumferential groove, 15 ... Energizing spring, 16 ... End part decorative cover, 20 ... Inner cylinder, 20a ... rear end, 20b ... tip, 21 ... outer cylinder, 21a ... rear end, 21b ... tip, 22 ... key insertion hole, 25 ... idling protective cover, 26 ... key insertion port, 27 ... annular wall portion, 28 ... flange portion, 29 ... fitting hole, 30 ... cover portion, 31 ... fitting recess, 31a ... inner peripheral wall, 35 ... click means, T. T1 ... tool, a ... pinching part.

Claims (4)

A cylinder lock 5, a fixed cylinder 7 fitted to the cylinder lock, and a crime prevention outer cylinder that is rotatably fitted to the fixed cylinder and interposed between the fixed cylinder and the cylindrical decorative ring 10. In the protection structure of the cylinder lock that protrudes from the outer wall surface of the door, 9 is idled by a drill operation in a state in which the tip of the cylinder lock 5 is externally fitted to the protruding tip 20b of the inner cylinder 20. An idling protection cover 25 supported so as to be able to be provided is provided, and the idling protection cover is locked to an annular wall portion 27 provided around the distal end portion of the fixed cylinder, and the projecting distal end portion of the inner cylinder is fitted. A flange portion 28 having a fitting recess 31 for an inner cylinder to be mated with the flange portion 28, and a fitting hole that forms the annular wall portion of the fixed cylinder ; · the addition to covering the front end face of the projecting distal portion 20b Enclosure cylinder lock comprising a cover portion 30 and having an insertion for mouth 26.   2. The protection structure for a cylinder lock according to claim 1, wherein a click means having a click ball pressed against the inner peripheral wall of the fitting recess of the flange portion is provided at the projecting tip portion of the inner cylinder. .   The outer cylinder for crime prevention according to claim 1, wherein the inner end portion is fitted into the mounting hole of the door, and at least the outer peripheral wall is formed in a truncated cone shape from the inner end portion to the tip end portion. Protective structure of cylinder lock. Protective structure of the cylinder lock in which the cylinder lock 5 and the outer cylinder 9A for crime prevention that are fitted to the cylinder lock and interposed between the cylinder lock and the cylindrical decorative ring 10 protrude from the outer wall surface of the door, respectively. In this case, an idling protective cover 25 is provided at the tip of the cylinder lock 5 so as to be able to idly rotate by a drill operation in a state of being externally fitted to the projecting tip 20b of the inner cylinder 20. The idling protection cover is locked to an annular wall portion 27A provided around the front end portion of the crime prevention outer cylinder body, and a flange portion 28 into which the protruding front end portion 20b of the inner cylinder 20 is fitted. In addition to being provided continuously, it is fitted into a fitting hole forming the annular wall portion of the outer cylinder for crime prevention, and covers the distal end surface of the protruding distal end portion of the inner cylinder and has a key insertion port portion 26. Chillin consisting of a cover part Protective structure over the lock.

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