JP2881002B1 - Cylinder lock device - Google Patents

Abstract

The present invention provides a cylinder lock device that is strong against any of puncture failure by a drill, pull-out fracture by a crowbar, and split fracture by a razor tool. SOLUTION: A thick protective disk 4 covering a front surface portion of a rotor 6 is made of a hard material, and the protective disk is rotatably mounted on a front end portion of a fixed case 5 via a connecting member such as a retaining ring 19. An annular ridge 4a is provided on the front side of the protection disk 4 to continuously surround the key hole 11 of the rotor 6, and a key insertion hole 4b is provided inside the annular ridge 4a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a cylinder lock device used for a lock handle device for a door of a vending machine and the like.

[0002]

2. Description of the Related Art In a conventional lock handle device for a door of a vending machine, an inner cylinder is rotatably and axially movably accommodated in an outer cylinder fixed to the door, and is engaged with a receiving portion of the vending machine main body. A mating catch plate is interlocked with the rear part of the inner cylinder. When the door is closed, the inner cylinder is pushed into the outer cylinder, and the inner cylinder is held at the immersion position by a cylinder locking device incorporated in the inner cylinder. When a predetermined key is inserted into the keyhole of the rotor of the cylinder lock device and the rotor is turned in a predetermined direction, the lock member interlocked with the rotor comes off the receiving portion on the outer cylinder side, and the inner cylinder is compressed by the compression coil spring. , It protrudes to a grippable position on the front side of the door.

[0003] In recent years, such a lock handle device for a door of a vending machine has been a problem of theft due to violent destruction of an internal lock mechanism of a cylinder lock device using a drill or a bar. In the method using a drill, as shown in FIG. 3, one or a plurality of small holes are formed with a drill tool along a so-called shear line on a line where the inner peripheral surface of the fixed case 5 and the outer peripheral surface of the rotor 6 contact each other. The internal lock mechanism consisting of the lock pins 8, 9 and the compression coil spring is destroyed. As a result, the function of the cylinder lock device is lost, and the inner cylinder is pushed out of the outer cylinder. Therefore, by turning the operation handle integrally formed with the inner cylinder, the door is opened without permission.

In order to prevent violent destruction by a drill,
It has been proposed that a protective disk 12 covering the front part of the rotor 6 be rotatably connected to a front end part of the fixed case 5 via a connecting member such as a retaining ring 19.
However, no matter how hard the protection disc is made of such a material that drilling is difficult or impossible, it is vulnerable to withdrawal by burls. As shown in FIG. 3, a tapping screw 13 is screwed deeply into the key hole 11 of the rotor 6 through the key insertion hole 12a1 of the protection disk 12, and a nail pulling bar 14 is hung on the head of the screw 13 to lower the screw. -Forcibly remove the heater 6 from the fixed case 5,
The internal locking mechanism such as the lock pins 8 and 9 is destroyed. As another method of violent destruction, there is a method in which the tip of a rag tool is hit against a key insertion hole, and the rag tool is hit with a hammer to split the protective disk itself.

[0005]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a cylinder locking device which is strong against any puncture breaking of a drill, pulling out of a crowbar or splitting of a razor tool.

[0006]

According to the present invention, the rotor 6 accommodated in the fixed case 5 is rotated with respect to the fixed case by a locking member such as a lock pin 8. When the predetermined key 18 is inserted into the keyhole 11 of the rotor 6,
In the lock device in which the restraint is released, the thick protective disk 4 covering the front surface of the rotor 6 is made of a hard material, and the protective disk is connected to the front end of the fixed case 5 by a retaining ring 19 or the like. An annular ridge 4a is provided on the front side of the protective disk 4 so as to continuously surround the keyhole 11 of the rotor 6, and the key insertion hole 4
b is provided inside the annular ridge 4a.

In this cylinder lock device, since the protective disk 4 is made of a hard material, it is impossible to make a hole of sufficient size and depth in the shear line portion with a normal drill tool. Very difficult. Further, even if the mode is switched to the pull-out mode by using a crowbar, since the height of the protective disk 4 is increased by the thickness of the protective disk 4, the length of the shaft portion of the tapping screw needs to be considerably long. With a normal length tapping screw, it is not possible to reach the keyhole 11 of the rotor 6 through the entire thickness of the protection disk 4 including the raised portion 4a, and even if a certain length is passed, The tapping screw cannot be screwed deeply into the rotor 6 and fixed, and the rotor 6 cannot be pulled out with a crowbar. Even when switching to split fracture by the rag tool, the raised portion 4a surrounding the key insertion hole 4b is formed in an annular shape so as to draw a continuous closed curve. The protruding portion 4a hinders the distal end portion from hitting the key insertion hole 4b. Since only a small razor tool with a narrow width at the tip can be applied, splitting and breaking of the protective disk 4 is impossible or very difficult.

[0008]

In the illustrated embodiment, the internal locking mechanism of the cylinder locking device is of the pin tumbler type,
Two lock pins 8 and 9 are accommodated in the radial pin hole 5 a of the fixed case 5 and the radial pin hole 6 a of the rotor 6, and are urged toward the key hole 11 by the compression coil spring 10. . As the internal lock mechanism, another disk tumbler type lock mechanism or the like can be applied. Key 1
8 is a plate key having a rectangular cross section,
Is formed in a substantially elliptical shape. The protective disk 4 has a short cylindrical portion fitted to the front end of the fixed case 5 and a receiving groove 20 into which the outer edge of the retaining ring 19 is fitted is provided on the inner peripheral surface of the short cylindrical portion. .
An inner edge portion of the retaining ring 19 is fitted in a receiving groove 21 on an outer peripheral surface of a front end portion of the fixed case 5. In this embodiment, the fixed case 5 is incorporated and fixed in the inner cylinder 2 of the lock handle device for the door of the vending machine.
Is housed in an outer cylinder 1 fixed to the outer cylinder 1. At the front end of the cylinder locking device, a rotary protective cover 22 is further provided.

[0009]

EFFECT OF THE INVENTION The cylinder lock device of the present invention configured as described above is strong against any of puncture breakage by a drill, pullout breakage by a crowbar, or split breakage by a rag tool, and is used in vending machines and the like. Security is further improved.

[Brief description of the drawings]

FIG. 1 is a front view of a cylinder lock device according to an embodiment of the present invention.

FIG. 2 is a sectional view of the cylinder lock device in a key inserted state.

FIG. 3 is a sectional view showing a method of violent destruction in a conventional cylinder lock device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer cylinder of lock handle device for doors 2 Inner cylinder of lock handle device for doors 3 Cylinder lock device 4 Protective disk 4a Raised portion 4b Key insertion hole 5 Fixing case 6 Rotor 7 Lock member 8 Lock pin 9 Lock pin 10 Compression coil spring 11 Keyhole 18 Key 19 Retaining ring

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-10-131561 (JP, A) JP-A 57-111950 (JP, U) Registered utility model 3042294 (JP, U) (58) Fields surveyed ( Int.Cl. ⁶ , DB name) E05B 15/00 E05B 17/00 E05B 17/14-17/20 E05B 65/00-65/02

Claims (1)

(57) [Claims] 1. A rotor 6 accommodated in a fixed case 5 is non-rotatably restrained with respect to the fixed case by a locking member such as a lock pin 8, and a predetermined key 1 is inserted into a key hole 11 of the rotor 6.
In the lock device in which the restraint of the rotor 6 is released by inserting the rotor 8, the thick protective disk 4 covering the front surface of the rotor 6 is made of a hard material, and the protective disk is connected to the front end of the fixed case 5. Rotatably connected to the protective disk 4 via a connecting member such as a retaining ring 19.
An annular ridge 4a is provided on the front side of the rotor to continuously surround the keyhole 11 of the rotor 6, and the key insertion hole 4b is formed in the annular ridge 4a.
Cylinder lock device installed inside.