JP2594236B2 - Chain lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chain used for vending machines and the like, in which a chain or the like fixed to a door is locked to a casing fixed to a fixed frame to prevent theft of goods. The present invention relates to a lock device.

[0002]

2. Description of the Related Art In a conventional chain lock device, a casing fixed to a fixed frame body, a lock unit which is non-rotatably fitted to a casing of a locking shaft which is formed in a front surface of the casing, A chain fixed to the door, consisting of hook fittings inserted into the blind hole provided in the front of the casing so that the flat body surface of the hook is perpendicular to the plane of the fixed frame body and horizontal to the ground. And the like are connected to a hook fitting, and the hook fitting is locked to the casing, thereby preventing the door from being pry open.

However, in this conventional device, since the keyhole is provided on the front of the casing, the lock unit is likely to be hit directly with rain, and the durability may be reduced by rainwater that has entered the lock unit. In addition, since prying with a driver or the like can be easily performed from the front side, it is not preferable for crime prevention.

Further, in the conventional apparatus, the hook fitting is located in front of the casing, and the flat body surface of the hook fitting is attached horizontally to the ground, so that it is vulnerable to impact damage from above by a hammer or the like. Further, since the hook fitting is provided in a direction protruding to the front side with respect to the casing, a bold image is given and the appearance is not good.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a chain lock device capable of preventing rain and wind from entering the inside of a casing, improving the appearance, and withstanding external impact destruction. is there.

[0006]

The present invention will be described with reference to the accompanying drawings, in which: a casing 2 fixed to a fixed frame 1; and a lock shaft cylinder portion drilled on a side surface of the casing 2. 3, a lock unit 4 non-rotatably fitted to the casing 2, and a protrusion 5 provided at the tip of a locking shaft 13 of the lock unit 4 non-rotatably fitted to the lock unit 4. The longitudinal cross-sectional shape is substantially elliptical. A lock cam 6 which is in contact with a cam surface 6a of the lock cam 6, and which rotates with the lock cam 6; a blind hole 7 included in a surface parallel to a fixed frame plane provided on a side surface of the casing 2; A locking member 9 which advances and retreats into a through hole 8 provided so as to penetrate the portion 3, and a flat body surface of a leg 18 of a hook fitting 11 is formed in the blind hole 7 so as to be parallel to the plane of the fixed frame and perpendicular to the ground. Inserted, the leg 18 is provided with a recess 10 Consist click fitting 11 Prefecture, locking member 9 in the recess 10 of the hook fitting 11 by the rotation of the key is engaged, hook fitting 11 to the casing 2 is fixed.

[0007]

The key 29 is inserted into the keyhole 12 of the lock unit 4 which is fitted and fixed in the locking shaft tube portion 3 of the casing 2,
By rotating in a predetermined direction, the lock shaft 13 and the lock cam 6 fitted to the projection 5 of the lock shaft 13 rotate.

When the longitudinal axis of the lock cam 6 is parallel to the longitudinal axis of the casing 2, two blind holes included in a plane parallel to the fixed frame 1 provided on the side surface of the casing 2. A bottom surface 9a of a lock member 9 fitted into a through hole 8 provided so as to penetrate the lock shaft tube portion 7 and the lock shaft tube portion 3 comes into contact with a wall surface cam portion 6a of the lock cam 6, and the lock member 9 locks the lock shaft tube. Since the force acts in the direction of being pushed out of the portion 3, the tip of the lock member 9 is projected and held in the blind hole 7, and the recess 10 provided in the leg portion 18 of the hook fitting 11 fitted in the blind hole 7. , The tip of the lock member 9 is engaged with the hook member 11, and the hook metal 11 is accurately locked to the casing 2.

When pulling out the hook fitting 11 from the casing 2, the key 29 is rotated in a predetermined direction, and the lock cam 6 is rotated.
Is made perpendicular to the longitudinal axis of the casing 2, an interval is generated between the bottom surface 9 a of the cam member 9 and the wall surface cam portion 6 a of the lock cam 6, , The force pushed out of the locking shaft tube part 3 does not work.

Therefore, the function of the hemispherical cam surface 9b provided at the distal end of the lock member 9 and the cam surface 10a of the recess 10 provided at the leg of the hook metal 11 causes the hook metal 1 to function.
By pulling out 1, the lock member 9 retreats toward the locking shaft tube portion 3 side, and the hook fitting 11 can be pulled out from the casing 2.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, as shown in FIG.
A screw hole 14 is provided in the fixed frame 1, a screw shaft 15 integrated with the casing 2 is fitted into the screw hole 14 from the front side, and a spring washer is inserted from the back side of the fixed frame 1 via a stopper 28. It is securely fixed to the fixed frame 1 by the nut 16 and the nut 17. The cross section of the wall cam portion 6a of the lock cam 6 is formed in an oval shape with two parallel straight portions and two arc portions, and the locking member is formed by a difference between the length in the long axis direction and the length in the short axis direction. 9 appears and disappears.

A groove 19 is provided at the base of the leg 18 of the hook fitting 11, and a step 20 is provided at the base of the leg 18 on the opposite side of the groove 19, and a chain pressing plate 21 is fitted. . The other half of the hook fitting 11 as viewed from the leg 18 is inclined upward by 20 degrees with respect to the fixed frame.

In the embodiment shown in FIG. 1, a chain 2 is attached to a hook fitting 11 fitted into a casing 2 fixed to a fixed frame 1.
2 and the other end of the chain 22 is connected to a chain fixing bracket 24 fixed to the door 23 side.

In the embodiments shown in FIGS. 6 and 7 and FIGS. 10 and 12, the longitudinal section of the projection 5 provided integrally with the rear end of the lock shaft 13 is made non-circular, A blind hole 25 having the same shape as the vertical cross section of the projection 5 is provided on the bottom surface of the lock shaft 13, and the lock cam 6 is fitted to the lock shaft 13 so as not to rotate.

A rotation angle regulating plate 27 having a non-circular through-hole 26 having the same shape as the longitudinal section of the projection 5 is not rotatable between the lock shaft 13 and the lock cam 6. It is fitted in.

[0016]

As described above, according to the present invention, the casing 2
Since the lock shaft unit 3 is provided on the side surface of the lock shaft unit 3 and the lock unit 4 is fitted into the lock shaft tube unit 3 so as not to rotate, the lock unit 4 is unlikely to be directly hit by rain, so durability is high. And has a shape that is difficult to pry open with a driver or the like, and is therefore excellent in crime prevention.

Further, according to the present invention, the blind hole 7 for inserting the hook fitting 11 is provided on the side surface of the casing 2, and the hook fitting 11 is attached with its flat body surface perpendicular to the ground. When hit from above, the hammer slides on the circular portion at the tip of the hook fitting 11, so that it is not sufficiently hit and resistant to violent destruction.
Such an arrangement also improves the appearance of the chain lock device.

When hitting the hook fitting 11 inserted into the side surface of the casing 2 as described above, the hammer directly hits the metal fixing frame or door to which the casing 2 is fixed, or is hit with a hammer. Hook 11
The impact vibration is transmitted to the fixed frame and the door and makes a loud noise due to resonance echo, which is a psychological motivation to interrupt the breaking and prying of the lock device, and accurately prevent prying thieves in vending machines etc. can do.

[Brief description of the drawings]

FIG. 1 is a front view showing a use state of a chain lock device according to an embodiment of the present invention.

FIG. 2 is a front view of the chain lock device.

FIG. 3 is a bottom view of the chain lock device.

FIG. 4 is a right side view of the chain lock device.

FIG. 5 is a front view of a hook fitting of the chain lock device.

FIG. 6 is a sectional view taken along line AA of FIG. 2;

FIG. 7 is a sectional view taken along line BB of FIG. 4;

FIG. 8 is a front view of a lock member of the chain lock device.

FIG. 9 is a plan view of the lock member.

FIG. 10 is a plan view of a lock cam of the chain lock device.

FIG. 11 is a bottom view of the lock cam.

FIG. 12 is a side view of the lock cam.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed frame 2 Casing 3 Locking shaft cylinder part 4 Locking unit 5 Projection part 6 Lock cam 7 Blind hole 8 Through hole 9 Lock member 10 Depression 11 Hook fitting 12 Key hole 13 Locking shaft 14 Screw hole 15 Screw shaft 16 Spring washer 17 Nut 18 Leg 19 Groove 20 Step 21 Chain holding plate 22 Chain 23 Door 24 Chain fixing bracket 25 Blind hole 26 Through hole 27 Rotation angle regulating plate 28 Stopper

Claims (1)

(57) [Claims] 1. A casing 2 fixed to a fixed frame 1.
And a locking shaft tube portion 3 formed in a side surface portion of the casing 2.
The lock unit 4 is non-rotatably fitted to the casing 2 and the protrusion 5 provided at the distal end of the lock shaft 13 of the lock unit 4 is non-rotatably fitted to the lock unit 4 and has a substantially elliptical vertical cross-sectional shape. A lock cam 6, a blind hole 7 which is in contact with a cam surface 6 a of the lock cam 6 and is included in a surface parallel to a plane of a fixed frame provided on a side surface of the casing 2 with rotation of the lock cam 6, A lock member 9 which advances and retreats into a through hole 8 provided so as to penetrate therethrough 3 and a flat body surface of a leg portion 18 of a hook fitting 11 is formed in the blind hole 7 so as to be parallel to the plane of the fixed frame and perpendicular to the ground. A chain lock device which is inserted and has a hook fitting 11 provided with a recess 10 in the leg 18, and the lock member 9 is engaged with the recess 10 of the hook fitting 11 by rotation of the key 29.