JPS60252537A - Paper feeder - Google Patents

Abstract

PURPOSE:To vary pressing contact force between sheets of paper and a feed roller desirably in accordance with the thickness and quality of said paper and prevent feeding in piled sheets or misfeeding by swinging a paper containing box vertically by means of a vertically swinging mechanism. CONSTITUTION:A cam 10 is rotated through one cam shaft 11, to swing a paper containing box 2 vertically with a pin 3 as the axis of rotation. And, with the spring force of a spring 7 maintained constant, the pressing contact force between sheets of paper 8 and a feed roller 9 can be varied in accordance with the thickness or quality of the paper 8, thereby, preventing feeding in piled sheets or misfeeding.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a paper feeding device that feeds stacked sheets of paper in a copying machine.

Prior Art A feed roller is provided above the paper tray set in the main body of a copying machine, and the paper accumulated on the paper tray is pressed against the feed roller with a predetermined pressure using a spring or the like, and the paper is sent out and fed by the feed roller. I don't know the paper device.
ing.

In such a paper feeding device, the pressure force between the paper and the feed roller is very important to prevent double feeding, misfeeding, etc.
This is important, and the pressing force differs depending on the thickness and quality of the paper.

For this reason, 1. Normally, the pressure is set to match the thickness and quality of the paper most used, but when using paper that is significantly thicker and of a different quality, the pressure may vary. Double shipping due to inappropriateness.

Misfeeds may occur.

OBJECT OF THE INVENTION It is an object of the invention to make it possible to arbitrarily change the pressing force between a feed roller and paper depending on the thickness and quality of the paper.

Composition of the Invention A paper storage box in which all papers are stored is vertically swingable, and a feed roller is provided above it.

A paper storage box equipped with a mechanism that swings it up and down.

Embodiment FIG. 1 is a longitudinal sectional view. t) A paper storage box 2 is supported by a bin 3 in a copying machine main body 1 so as to be vertically swingable.

The paper storage box 2 has a box shape with an open top formed by a bottom wall 4 and a peripheral wall 5. A bottom plate 6 is provided inside the box and is biased upward by a spring 7, and the paper S is placed on the bottom plate 6. A feed roller 9 is rotatably supported above the paper 8 by the copying machine main body IK.

IQ is a cam V, which is fixed to a cam shaft 11 rotatably supported on both side walls 1α1α of the copying machine main body 10, and is in contact with the recess 4α of the bottom wall 4, and one end of the cam shaft 11 is attached to the side wall 1a. A knob 12 that protrudes outward and serves as a pusher is attached to the knob 12. A pointer 13 is fixed to the knob 12, and a scale plate 15 having a scale 14 is attached to the side wall (a).

The scale 14 is for converting and displaying the pushing force of the bottom plate 4 by the cam IOK, that is, the pressing force between the paper 8 and the feed roller 9.

By rotating the cam shaft 11i using the knob I2 and rotating the cam fO, the paper storage box 2 can be swung up and down with the bin 3 as the center, so that the paper 8 can be moved with the spring force of the spring 7 constant. The pressure contact force with the feed roller 9 can be changed.

Therefore, since the pressing force can be adjusted according to the thickness and quality of the paper 8, double feeding and misfeeding can be prevented.

Further, since the pressure contact force can be changed by rotating the external F knob 13 of the copying machine main body 1, the operation is simple, and the pressure contact force can be visually confirmed using the pointer 13 and the scale 14.

Note that the camshaft 11 may be rotationally driven by a motor.

Further, instead of the cam 100, a roller may be provided at the tip of the swinging lever, and the roller may be brought into contact with the bottom wall 4 to change the entire pressing force.

In other words, it is sufficient to provide a mechanism for swinging the paper storage box 2, which is vertically swingable, toward the feed roller 9.

Effects of the Invention By swinging the paper storage box 2 up and down, the pressure between the paper 8 and the feed roller 9 can be adjusted. The pressure contact force can be changed arbitrarily, and double feeding and misfeeding can be prevented.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, with FIG. 1 being a longitudinal sectional view and FIG.
The figure is a sectional view taken along line nn of No. 1 (9), and Fig. 3 is the I of Fig. 2.
FIG. 2 is a front view from II. 1 is the copying machine body, 2 is a paper storage box, 8 is paper, and 9 is a feed roller. Applicant: Fuji Xerox Co., Ltd. Agent Patent attorney: Masaaki Yonefu Patent attorney: Tadashi Hamamoto Figure 2 Figure 3

Claims (1)

[Claims] A paper storage box 2 containing paper 8 is supported so as to be vertically swingable, and a feed roller 9 is placed above the paper storage box 2 to hold the paper 8.
The paper feeding device is characterized in that it is provided so as to be in pressure contact with the paper storage box 2, and is also provided with a mechanism for vertically swinging the paper storage box 2 toward the feed roller 9.