JP3054390B2 - Arm lock device for doors of vending machines, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arm lock device for restraining a door of a box body of a vending machine or the like from being opened and unable to rotate.

[0002]

2. Description of the Related Art Vending machines installed in public spaces such as outdoors are apt to be burglary on holidays and at night, and various door lock devices have been proposed to prevent burglaries. Current burglars use electric drills to drill around the keyhole of the rotor of the lock unit, destroy the pin tumbler or other locking mechanism built into the rotor, or screw the screw head into the keyhole. Violent methods such as breaking a lock mechanism by hanging a nail pulling bar on a portion and pulling a rotor from a fixed main body of a lock unit are increasing. Recently, a rough thief who has inserted a crowbar between the front of the box body and the rear of the door without touching the lock unit and forcibly opening the door has appeared.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a door arm lock device in which a door is held in a box body side to prevent the door from being opened by a bar or the like. .

[0004]

A door arm lock device for a vending machine or the like according to the present invention is fixed to one side surface of a box body 13 and has an outer peripheral surface. The fixed support shaft body 1 provided with the ratchet teeth row 1a is fitted to the fixed support shaft body 1 at the base end portion of the bearing cylinder portion a, and the bent arm portion 4b at the distal end portion is restrained on the front side of the door 12. A lock arm 4 rotating between a position and a restraint release position detached from the front surface of the door 12, and a ratchet tooth row of the fixed support 1 attached to the lock arm 4 with a pivot 6 parallel to the fixed support 1. A ratchet claw 2 engaging and disengaging 1a;
A lock unit 8 fixed to the lock arm 4 and a rotor 8a of the lock unit 8 or an interlocking body 8b connected to the rotor 8a are eccentrically provided, and the rotor 8a
Ratchet claw 2 by ratchet teeth 1
a, and a spring 3 for urging the ratchet pawl 2 to rotate in the direction of engagement with the ratchet teeth row 1a.

In this door arm lock device, when the rotor 8a is rotated in a predetermined direction to insert the predetermined key 17 into the keyhole of the lock unit 8, the ratchet claw 2 is rotated by the cam projection 7, and the ratchet is rotated. The pawl 2 separates from the ratchet tooth row 1a. Therefore, the rotation of the lock arm 4 with respect to the fixed support 1 is stopped, and the lock arm 4 becomes rotatable about the rotation support shaft 1. Bending arm part 4
b rotates the lock arm 4 to the restraint release position where the lock arm 4 is completely retracted from the front side of the door 12, and then the key 17 is moved to the rotor 8.
When the ratchet pawl 2 is pulled out from the a, the ratchet pawl 2 rotates in the reverse direction by the bias of the spring 3 and engages with the ratchet teeth row 1a. Therefore, the lock arm is stopped from rotating at the restraint release position (the position indicated by the two-dot chain line in FIG. 7). At this stage, another lock handle device 15 is released, and the door 12 is opened and rotated about the hinge 14.

After replenishment of commodities and collection of money are completed, the door 12 is closed and rotated, and then the lock handle device 1 is closed.
5 locks the door 12 to the box body 13.
Thereafter, when the lock arm 4 is rotated from the restraint release position to the restraint established position, the ratchet pawl 2 moves while contacting the ratchet teeth row 1a. When the rotation of the lock arm 2 is stopped at the restraint position where the bent arm portion 4b of the lock arm 2 is close to or in contact with the front surface of the door 12, the ratchet pawl 2 engages with the ratchet tooth row 1a, and the lock arm 2 is moved. The rotation is stopped at the position where the constraint is established (the position indicated by the chain line in FIG. 7).

[0007]

In the embodiment shown in FIGS. 1 to 7, the ratchet teeth row 1a of the fixed support shaft 1 is not provided on the entire peripheral surface, and the rotation angle of the lock cam 4 is about 180 degrees. Within the limits. The fixed support shaft 1 has four bolts 1
6, it is fastened and fixed to the side plate of the box body 13. A cover plate 5 is provided with a bolt 1 on the end surface of the fixed support shaft 1.
The lock arm 4 is secured by the cover plate 5 to prevent the lock arm 4 from being pulled out of the fixed support shaft 1.
The lock unit 8, the interlocking body 8b and the ratchet claw 2
The lock arm 4 is housed in the cavity. The urging spring 3 of the ratchet claw 2 is constituted by a torsion spring fitted on the pivot 6. As shown in FIGS. 4 and 5, the cam projection 7 is in contact with the base end 2 a of the ratchet pawl 2. The pivot 6 penetrates substantially the middle of the ratchet pawl 2. The lock arms 4 are provided on both left and right sides of the box body 1, and the bent arm portions 4 b, 4 of the left and right lock arms 4, 4 are provided.
Each end of the communication pipe 9 is fitted into b. The left and right rotors 8a, 8a are interlocked by the interlocking disc 11 and the interlocking wire 10 so that the ratchet claws 2, 2 in the left and right lock arms 4, 4 rotate forward and backward in synchronization. In the case of providing a pair of left and right or a pair of upper and lower parts in this manner, one lock unit 8 may be a dummy, and is not required to have a function as a lock.

[0008] In the embodiment shown in FIG.
Are provided on only one of the left and right sides of the box body 13. In the embodiment shown in FIG.
A communication pipe 9 is fitted into each of the bent arm portions 4b. The lock arm 4 can be provided on only one of the upper and lower sides of the box body 13. When the lock arm 4 is provided on the lower surface of the box body 13,
Sufficient space is secured between the bottom surface of the box body 13 and the installation floor surface near the support legs so that the lock arm 4 can be retracted and rotated to the constraint release position. In addition,
A known lock unit 8 can be arbitrarily selected and used.

[0009]

As described above, in the door arm lock device of the present invention, the lock arm 4 is rotated around the fixed support shaft 1 fixed to the side surface of the box body 13 and the ratchet provided on the lock arm 4 side. Since the pawl 2 is engaged with the ratchet teeth row 1a of the rotary support shaft 1, the bent arm portion 4b of the lock arm 4 is rotationally stopped at a position where the constraint is established near or in contact with the front surface of the door 12. The door 12 is firmly held on the side of the box body 13 and has a strong stopping power against a thief who tries to forcibly open the door 12 by inserting a crowbar between the box body 13 and the door 12.

Further, the ratchet claw 2 and the ratchet tooth row 1
By selecting the engagement position a, the position where the constraint is established can be moved within a certain range, so that it can be effectively applied to doors 12 of various thicknesses and is excellent in versatility. .

[Brief description of the drawings]

FIG. 1 is a perspective view of a vending machine equipped with a door arm lock device according to one embodiment of the present invention, in which a lock arm is in a restraint position.

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

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a schematic diagram showing a relational position between a ratchet pawl and a cam protrusion when the rotor is turned to an unlocking position, and the ratchet pawl has been separated from the ratchet tooth row.

FIG. 5 is a schematic view showing a relational position between a ratchet pawl and a cam protrusion when the rotor is turned to a locking position, wherein the ratchet pawl is engaged with the ratchet teeth. You.

FIG. 6 is a perspective view of a fixed support shaft having ratchet teeth.

FIG. 7 is a plan view of a main part showing a position occupied by a lock arm.

FIG. 8 is a perspective view when the arm lock device is provided only on the right side of the box body.

FIG. 9 is a perspective view when arm lock devices are provided on both upper and lower sides of a box main body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed support shaft body 1a Ratchet teeth 2 Ratchet pawl 3 Ratchet pawl biasing spring 4 Lock arm 5 Cover plate 6 Axis 7 Cam projection 8 Lock unit 9 Communication pipe 10 Interlocking wire 11 Interlocking disc 12 Door 13 Box body 14 Hinge 15 bolts 16 bolts 17 keys

Claims (1)

(57) [Claims] 1. A box body 13 fixed to one side surface,
A fixed shaft body 1 provided with a ratchet tooth row 1a on the outer peripheral surface;
Is fitted to the fixed support shaft body 1 at the bearing cylinder portion a at the base end,
A lock arm 4 that rotates between a restraint position in which a bent arm portion 4b at a front end portion is on the front side of the door 12 and a restraint release position that is separated from the front surface of the door 12, and a pivot 6 that is parallel to the fixed support body 1.
The ratchet pawl 2 attached to the lock arm 4 and engaged with the ratchet tooth row 1a of the fixed support body 1, a lock unit 8 fixed to the lock arm 4, and a lock unit 8
Rotor 8a or interlocking body 8b connected to rotor 8a
And a cam projection 7 for engaging and disengaging the ratchet pawl 2 with the ratchet teeth row 1a by the forward and reverse rotation of the rotor 8a by the key 17, and a rotational bias in the direction of engaging the ratchet pawl 2 with the ratchet teeth row 1a. Consisting of a spring 3
By engaging the ratchet pawl 2 with the ratchet teeth row 1a, the bending arm section 4b is stopped at the restraint position, and by releasing the ratchet pawl 2 from the ratchet teeth row 1a, the bending arm section 4b is released from the restraint release position. Arm lock device for doors of vending machines, etc.