JPH0478536B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a paper feeding device used in office equipment such as copying machines and printers that require paper feeding.

BACKGROUND OF THE INVENTION Conventionally, among office equipment that requires paper feeding, for example, a copying machine has used a paper feeding device as shown in FIG. 1, for example. In the figure, reference numeral 1 is a driven roller, 2 is a driving roller, 3 is paper, and 4 is a guide. Then, the drive roller 2 is rotated in the direction of the arrow, and the paper 3 is sandwiched between the drive roller 1 and the driven roller 1 and guided by the guide 4 to be sent out.

However, this type of paper feeding device requires a motor and also requires a transmission mechanism such as a belt or gear to transmit the rotational force of the motor to the drive roller 2.

For this reason, there were problems in that the number of parts increased, which required more space, and increased noise.

On the other hand, for example, a printer uses a paper feeding device as shown in FIG. In the figure, reference numeral 5 is a platen, 6 is a pressure roller, 7 is a bracket, 8 is a guide, and 9 is a sheet of paper. Then, the platen 5 is rotated in the direction of the arrow, and the paper 9 is guided and fed by a guide 8 which is sandwiched between the pressure rollers 6, 6 and supported by a bracket 7.

However, this type of paper feeding device similarly requires a motor and a transmission mechanism such as a belt or gear to transmit the rotational force of the motor to the platen 5.

For this reason, there are also problems in that the number of parts increases, occupies more space, and generates more noise.

OBJECTIVE Therefore, an object of the present invention is to solve the above-mentioned conventional problems, and to provide a paper feeding device that does not require a motor or a transmission mechanism, has a reduced number of parts, occupies a small space, and has low noise. There is a particular thing.

Configuration Examples of the present invention will be described below based on the drawings.

FIG. 3 shows a first embodiment of the invention. Reference numeral 10 in the figure is a vibrating body. The vibrating body 10 includes a vibrating member 11 and a vibration generating member 12. The vibrating member 11 is formed by forming, for example, a brass tube of an appropriate length into an oval shape. On the other hand, the vibration generating member 12
is made of a piezoelectric element, and is fixed to the inner surface of the vibrating member 11 with an adhesive or the like. Such a vibrating body 10 has an appropriate sheet-like friction member 20 made of rubber or the like having a relatively high coefficient of friction fixed to its outer surface by appropriate means such as coating or adhesion.
Reference numeral 33 in the figure is a part of a paper storage cassette provided in the paper supply section A, and the paper 13 is loaded therein. Then, the outermost paper 13a is pressed against the vibrating body 10 via the friction member 20. In the figure, reference numeral 35 is a corner claw provided on the cassette 33, and 34 is a paper feed roller.

Then, applying an alternating voltage to the piezoelectric element and driving the vibration generating member 12, vibrating the vibrating member 11 and transmitting vibration waves from the vibrating body 10 to the friction member 20,
Paper 13 is sequentially loaded from the cassette 33 of the paper supply section A.
are separated by corner claws 35 and sent out one by one.
As shown by the chain lines in the figure, paper feed rollers 34, 34
Transport it in between.

FIG. 4 shows a second embodiment of the invention. In this second embodiment, instead of the sheet-like friction member 20, a belt-like friction member 21 is wound around the outer peripheral surface of the vibrating body 10. The vibration waves generated in the vibrating body 10 cause the friction member 21 to rotate along the surface of the vibrating member 11 in the direction of the arrow. As a result, the sheets 13 are sequentially fed out one by one from the cassette 33 of the sheet replenishing section A, and similarly placed between the sheet feed rollers 34 and conveyed as shown by the chain lines in the figure.

Effects Therefore, according to the present invention, an alternating voltage is applied to the piezoelectric element to generate a vibration wave in the vibrating body, and the vibration wave feeds the paper from the paper supply section, so the configuration is extremely simple. , does not require a motor as in the past, nor does it require a transmission mechanism such as a belt or gear to transmit the rotational force of the motor to the drive roller or platen, thus reducing the number of parts and occupying a small space. At the same time, noise can be reduced by eliminating the drive noise of the motor and the friction noise of the transmission mechanism, which were conventionally required. Also,
The vibrations of the piezoelectric element are transmitted to separate the stacked sheets of paper in the paper replenishing section one by one, and the separated sheets can be reliably sent out one by one using a friction member.

[Brief explanation of the drawing]

1 and 2 are schematic configuration diagrams of conventional paper feeding devices, respectively. FIG. 3 is a schematic diagram of a paper feeding device according to a first embodiment of the present invention, and FIG. 4 is a schematic diagram of a paper feeding device according to a second embodiment. 10... Vibrating body, 11... Vibrating member, 12...
Vibration generating member, 13... Paper, 13a... Outermost paper, 20... Sheet-like friction member, 21... Belt-like friction member, A... Paper supply section.

Claims (1)

[Scope of Claims] 1. A paper replenishing section for stacking a plurality of sheets, a vibration generating member made of a piezoelectric element, a vibrating body consisting of a vibrating member to which the vibration generating member is attached, and the vibrating member of the vibrating body. When the piezoelectric element is attached and contacts the outermost paper of the paper replenishing section, and the vibration generation member is driven by applying a voltage to the piezoelectric element to vibrate the vibration member, a vibration wave is transmitted from the vibration member. A paper feeding device, comprising: a friction member that sequentially feeds paper sheets one by one from the paper supply section.