JPS63170054A - Printer - Google Patents

Abstract

PURPOSE:To redude the number of parts and to miniaturize a printer, by performing the feed of paper due to the rotation of a platen and the opening and closing of a bail roller by a single paper feed motor. CONSTITUTION:A worm gear 4 meshes with a worm wheel gear 2 and transmits the rotary power of a paper feed motor 3 to a platen 1 to feed the paper 7 wound around the platen 1. A pulley 5 is mounted to an electromagnetic clutch 6 in a freely rotatable manner and, only when said pulley 5 is arbitrarily attracted by the electromagnetic clutch 6, the rotary power of the motor 3 is transmitted and a wire 8 is taken up by the pulley 5 to pull a stud pin 11. As a result, a bail arm 9 is rotated to separate a bail roller 15 from the platen 1. When the attraction of the electromagnetic clutch 6 is stopped, the bail arm 9 is reversed by the force of a spring 4 and the bail roller 15 is brought into contact with the platen 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printer device, and particularly to a paper feeding mechanism and a bail roller opening/closing mechanism of the printer device.

[Prior Art] Conventionally, as shown in FIG. 2, the paper feeding mechanism of this type of printer device reduces the driving force of the paper feeding motor 3 via a motor gear 18 and a plurality of spur gears 17a, 17b to transfer the driving force to the platen gear. 19 and the platen 1, and the paper 7 wrapped around the platen 1 is sent.

Furthermore, opening and closing of the bail roller 15 that presses the paper on the platen 1 is performed by operating the wire 8 of the bail arm 9 using the suction device 20.

[Problems to be Solved] In the conventional printer device described above, a plurality of spur gears 17a and 17b are interposed between the paper feed motor 3 and the platen gear 19, and a suction device 20 and the like are used to open and close the bail roller 15. Since it is used, there are drawbacks such as a large number of parts and a large space requirement.

[Means for solving the problems] The printer device of the present invention that solves the above-mentioned conventional problems has the following features:
A worm wheel gear is fixed to a platen shaft, a paper feed motor is provided with a worm gear meshing with the worm wheel gear, a pulley, and an electromagnetic clutch on the shaft, and the bail arm and the pulley are connected by a wire.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a printer device according to an embodiment of the present invention. A platen 1 is rotatably supported on a side frame 10, and a worm wheel gear 2 is attached to one end of a platen shaft 1a of the platen 1. Paper feed motor 3
is attached to a side frame 10 perpendicular to the platen shaft 1a, and a worm gear 4 is attached to one end of the motor shaft 3a of the paper feed motor 3, and a pulley 5 and an electromagnetic clutch 6 are attached to the other end. .

The worm gear 4 meshes with the worm wheel gear 2, transmits the rotational power of the paper feed motor 3 to the platen 1, and sends the paper 7 wound around the platen 1. Also,
The pulley 5 is rotatably attached to the electromagnetic clutch 6, and the rotational power of the motor 3 is transmitted only when the pulley 5 is arbitrarily attracted by the electromagnetic clutch 6. Further, one end of a wire 8 is connected to the pulley 5, and the other end of the wire 8 is connected to a stud pin 11 fixed to the bail arm 9.

The bail arm 9 is rotatably fixed to a shaft 12 fixed to a side frame 10, and normally a spring 14 attached to a support bracket 13 pulls a stud pin 11, so that the bail shaft fixed to the bail arm 9 is rotated. 16 is pressed against the platen 1 side and the bail roller 1
5 is in contact with the platen 1 with the paper 7 interposed therebetween.

Note that if there is no paper 7, the bail roller 15 directly contacts the platen 1.

When the pulley 5 is attracted by the electromagnetic clutch 6 and the rotational power of the paper feed motor 3 is transmitted, the wire 8 is attached to the pulley 5.
is wound up and pulls the stud pin 11. As a result, the bail arm 9 rotates and the bail roller 15 separates from the platen 1.

Then, when the electromagnetic clutch 6 stops attracting, the bail arm 9 is reversed by the force of the spring 14, and the bail roller 15 comes into contact with the platen 1.

As described above, in the printer device of this embodiment, the rotation of the platen 1 and the opening and closing of the bail roller 15 can be performed by the single paper feed motor 3.

[Effects of the Invention] As explained above, the present invention uses a single paper feed motor to feed the paper by rotating the platen and to open and close the bail roller, thereby eliminating the need for multiple spur gears and suction devices as in the past. There is no need to provide such a printer, and the number of parts can be reduced, the printer device can be made smaller, and costs can also be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a printer device according to an embodiment of the present invention, and FIG. 2 is a perspective view of a conventional printer device. 1 Nibraten 1a Nibraten shaft 2: Worm wheel gear 3: Paper feed motor 4: Worm gear 5: Pulley 6: Electromagnetic clutch 8: Wire
9: Bale arm 15: Bale roller

Claims (1)

[Claims] A printer device comprising: a worm wheel gear fixed to a platen shaft; a paper feed motor having a worm gear meshing with the worm wheel gear; a pulley; and an electromagnetic clutch on the shaft; and a bail arm and the pulley connected by a wire. .