JPH06103009A - Paper feeding mechanism for word processor - Google Patents

Abstract

PURPOSE:To feed the printing paper so that the load of printing paper is not easily inclined. CONSTITUTION:This mechanism is provided with driving motors 22a and 22b for respectively independently rotating feeding rollers 11 and 12, two photosensors 26 and 27 for detecting the position of the edge part of printing paper 37, and control part 28 for sending outputs to the driving motors 22a and 22b corresponding to the outputs of the photosensors 26 and 27. The inclination of the printing paper 37 is detected by the two photo-sensors 26 and 27, the driving motors 22a and 22b are rotated corresponding to the inclination, and the inclination of printing paper 37 is corrected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feed mechanism of a word processor.

[0002]

2. Description of the Related Art FIG. 3 is a diagram showing a structure of a main part of a word processor, and FIG. 4 is a diagram showing a paper feeding mechanism in FIG. Conventionally, a word processor, as shown in FIG. 3, outputs an input unit 33 such as a keyboard, a display unit 34 for displaying the input command or language, and a language or a figure displayed on the display unit 34. Printing section 35
Is configured in. Further, the printing unit 35 includes a paper feeding mechanism 36 that feeds the printing paper.

As shown in FIG. 4, the paper feed mechanism of this word processor has a rotary shaft 32 mounted on both walls 16 and 17 of the main body, and a paper mounted on the rotary shaft 32 at a predetermined interval. Feed rollers 11 and 12 for feeding,
Pressing rollers 23 and 24 mounted on a shaft 25 for holding and pinching the printing paper in cooperation with the feed rollers 11 and 12, and a drive motor 2 for rotating a rotating shaft 32 via gears 18 and 20.
It consisted of 2 and.

The operation of this paper feeding mechanism is performed by feeding the printing paper printed by the printing section 35 to two sets of paper feeding rollers 11 and 1.
The printing paper was sent out from the printing unit 35 by being sandwiched between the pressing roller 23 and the pressing rollers 23 and 24. Further, the feed rollers 23 and 2
The interval of 4 could be adjusted according to the width of the printing paper.

[0005]

In the conventional paper feed mechanism of the word processor described above, a plurality of paper feed rollers rotate at the same time to feed the printing paper. However, when the printing paper is obliquely inserted, the misalignment is corrected. However, there was a problem that it was sent as it was and printed as it was.

An object of the present invention is to provide a paper feeding mechanism of a word processor which can feed a printing paper without skewing.

[0007]

A paper feed mechanism of a word processor according to the present invention comprises a plurality of feed rollers for nipping a printing paper with a pressing roller and feeding it in one direction, and a plurality of drives for rotating a rotary shaft attached to these feed rollers. A motor, an optical sensor for detecting at least two side end portions of the printing paper, and a control unit for sending an output to each of the drive motors according to the output of the optical sensor are provided.

[0008]

The present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the construction of an embodiment of the paper feeding mechanism of the word processor of the present invention, and FIG. 2 is a diagram for explaining the paper feeding mechanism of FIG. As shown in FIG. 1, this paper feeding mechanism is provided with rotating shafts 13 and 14 and drive motors 22a and 22b that rotate the feeding rollers 11 and 12 independently of each other. Provided are optical sensors 26 and 27 for measuring the amount of reflected light at a portion, and a control unit 28 for inputting a photocurrent of the optical sensors 26 and 27 and sending an output to each of the drive motors 22a, 22b according to the input. Is. Otherwise, it is the same as the conventional example.

Next, the operation of this paper feed mechanism will be described.
As shown in FIG. 2A, if the printing paper 37 printed by the printing unit is inclined with respect to the feeding direction, the amount of reflected light received by the optical sensors 26 and 27 from the end of the printing paper 37 is different. It is illuminated. (Here, the amount of reflected light is shown by the shaded portion.) Next, the photocurrents output from the detectors 26 and 27 are input to the control unit 28. Next, this control unit 2
8 outputs to each drive motor 22 according to a photocurrent. As a result, the drive motor 22b becomes
The rotation speed is higher than that of a, and the feed roller 11 rotates at a higher speed and the feed roller 12 rotates at a lower speed. Then, as the paper feeding progresses, as shown in FIG. 2B, the front end portion of the printing paper 37 is parallel to the rotating shafts 13 and 14, and the skew is corrected. Although the optical sensor in this embodiment having both the light receiving portion and the light emitting portion is used, the light emitting portion may be provided in a row and the optical sensor may be a photodiode having a light receiving function. Further, transmitted light may be used instead of reflected light. Furthermore, the same effect can be obtained by arranging these optical sensors on both sides of the printing paper instead of one end.

[0011]

As described above, the paper feed mechanism of the word processor of the present invention is provided with the drive motor for independently rotating the plurality of feed rollers and the optical sensor for detecting the skewness of the printing paper. By detecting the skewness and rotating each drive motor according to the skewness, skew skew for printing can be corrected, and the leading edge of the printing paper can be aligned with the feed roller to feed the paper. . Also, you can easily load printed paper without paying attention.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of a paper feeding mechanism of a word processor of the present invention.

FIG. 2 is a diagram for explaining the operation of the paper feeding mechanism of FIG.

FIG. 3 is a diagram showing a configuration of a main part of a word processor.

FIG. 4 is a diagram showing a configuration of a paper feeding mechanism of FIG.

[Explanation of symbols]

 11, 12 Feed rollers 13, 14, 32 Rotating shafts 16, 17 Walls 18, 20 Gears 22, 22a, 22b Drive motors 23, 24 Pressing rollers 25 Shafts 26, 27 Optical sensors 28 Control unit 33 Input unit 34 Display unit 35 Printing unit 36 Paper feed mechanism 37 Printing paper

Claims (1)

[Claims] 1. A plurality of feed rollers for nipping the printing paper with a pressing roller and feeding it in one direction, a plurality of drive motors for rotating a rotary shaft attached to the feeding rollers, and at least two side end portions of the printing paper. A paper feeding mechanism for a word processor, comprising: an optical sensor for detecting a position; and a control section for sending an output to each of the drive motors according to an output of the optical sensor.