JPS6015332A - Sheet feeder - Google Patents

Abstract

PURPOSE:To decrease the size of a duplicator and to prevent sheets from absorption of moisture, by a method wherein a cassette upper cover is openably attached to a cassette body to form a sheet feed caassette with a sheet outlet, and a sheet feed member, driven by a motor, is mounted thereto. CONSTITUTION:A cassette upper cover 2 is pivotally secured to a cassette body 1 by means of a pin 1a, and a sheet feed cassette having a sheet outlet 3 is formed between a front wall 1b of the cassette body 1 and a front edge 2a of the cassette upper cover 2. A sheet feed roller 4 is rotatably supported to the cassette upper cover 2 through a support shaft 5 and a bearing 6, and a motor 7 is securely adjacently to the sheet feed roller 4. (The motor 7 is connected to said support shaft 5 through a reduction gear 8 and a transmission mechanism 9, and a collector part thereof is connected to an electrode 11 located to a front end 2b of the cassette upper cover 2 through a cord 10. This allows the decrease in size and thickness of a duplicator and causes the sheets to be prevented from absorption of moisture during feed of the sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a paper feeding device used in copying machines, light printing machines, and the like.

Prior Art As shown in FIG. 1, a paper feed cassette b is removably pivoted to a copying machine main body α, and a paper feed roller C provided on the copying machine main body α.
The sheets are fed one by one starting from K.

In other words, the paper feeder A is a box in which paper is stored and stored, and its main role is to store paper outside the copying machine main body 1.

For this reason, the paper feed roller C is driven from a main motor (not shown) on the copying machine main body 1 through a gear or chain transmission mechanism, which makes the device complicated and bulky, so it can be installed in a wide space. This requires space, which poses a problem in making the entire copying machine smaller, thinner, and lighter.

Furthermore, as shown in FIG. 2, when the paper feed cassette h is installed in the copying machine main body a, the paper d and the paper feed roller C must be pressed against each other, so that the upper Mb of the paper feed cassette b must be pressed against the paper d. Part b
− needs to be opened.

For this reason, when paper d is fed, it is exposed to the outside air and absorbs moisture, resulting in a high moisture content, resulting in poor transfer.

This caused the paper to wrinkle.

OBJECTS OF THE INVENTION It is an object of the invention to make a copying machine etc. smaller and thinner, and to prevent paper from absorbing moisture during paper feeding.

Structure of the Invention A paper feeding cassette is provided with a paper feeding member and a motor for driving the paper feeding member.

Embodiment FIG. 3 is an overall schematic perspective view, in which a cassette top lid 2 is rotatably provided on a cassette body 1 with a pin 1α, and between the front i1b of the cassette body 1 and the front end edge 2a of the cassette top lid 2. It constitutes a paper feed cassette having a paper outlet 3, and a paper feed roller 4 serving as a paper feed member is mounted on the cassette top lid 2.
is rotatably supported via a spindle 5 and a bearing 6, and a small, thin (flat) motor 7 is fixedly installed adjacent to the paper feed roller 4, and the motor 7 is equipped with a speed reducer 8, a gear type The power receiving part of the motor 7 is connected to the support shaft 5 via a transmission mechanism 9, and is connected to the fC electrode 11 provided on the front end surface 2b of the cassette top cover 2 via a cord IO'. Reference numeral 11 is configured to fit and connect with an electrode (pin) 12 provided on the main body A of the copying machine.

FIG. 4 is a partial vertical sectional view of FIG. 3, and shows the cassette body 1.
A paper handling member 13 is provided on the bottom wall IC of the IC, and a bottom grate 14 is also provided with a spring member 15 that pushes upwardly and presses the paper 16 loaded on the bottom plate 14 against the paper feed roller 4. At the same time, a portion of the paper feed roller 4 and the motor 7 are covered with a molding cutter 17.

Further, the paper outlet 3 is covered with a flexible thin film 1g provided on the front wall 1b of the cassette body 1.

When the paper feeding device is inserted and set in the copying machine main body A, the electrodes 11 and 12 are fitted and connected, and the motor 7
The power supply to is set.

Next, a copy start button (not shown) provided on the copying machine body A
Press the electrode +2. Electric power is sent to the motor at a predetermined timing via II to drive it, and its rotation is decelerated @8.
It is transmitted to the paper feed row 24 via the gear type transmission mechanism 5, separated one by one by the paper sorting member 13, and the paper +6 is sent out and fed in the direction of arrow F through three paper exits.

Note that the motor 7 has a shape with a thickness of about IOw, and by using the reducer 8, the rotational torque is large enough to convey the paper 7Dx.

It can be obtained with a voltage of about 45 (V, DC), so
Even if the motor 7 is built in, the space required to drive the paper feed roller 4 is about 10 to 12 mm in height, and the device can be made considerably thinner.

On the other hand, the copying machine main body AK has a paper feed roller and drive source.

Since there is no need to provide a transmission mechanism, the installation space can be reduced, and the device can be made smaller and thinner.

In addition, the cassette top cover 2 can be kept closed during paper feeding, and outside air can be introduced from the paper exit 3.

Since the amount is so small, the paper 16 does not absorb moisture.

In addition, in Example-C, since the paper outlet 3 is closed with a thin film 18 (for example, 20 to 30μ conductive Mylar), moisture absorption of the paper 16 can be more reliably prevented, and the thin film 1g and cassette The thin film 1g may be provided so as to form a gap between it and the front edge 2eL of the upper lid 2, which is large enough to allow one sheet of paper to pass through.

FIG. 5 is a perspective view of another embodiment, in which the cassette top lid 2 can be opened and closed in a direction perpendicular to the paper conveyance direction (arrow F), and a motor storage portion (9) is formed on the side surface of the cassette top lid 2. The motor 7 in the motor housing 19 is connected to the support shaft 5 of the paper feed roller 4 via a transmission mechanism 20 consisting of a worm gear, a worm wheel, and a train of spur gears.

Effects of the Invention There is no need to provide a paper feed member, a motor, etc. in the copying machine main body, etc., and the copying machine etc. can be made smaller and thinner.

The upper cassette N can be closed during paper feeding, and the paper can be prevented from absorbing moisture during paper feeding.

[Brief Description of the Drawings] Figs. 1 and 2 are front and perspective views of a conventional example, and Fig. 3 shows an embodiment of the present invention. Figures 5 and 5 are overall schematic perspective views of other embodiments. ■ is the cassette body, 2 is on the cassette! , 3Fi paper outlet, 4 is a paper feeding member, and 7 is a motor. Applicant Fuji Xerox Co., Ltd. Agent Patent Attorney Masaaki Yonehara Patent Attorney Tadashi Hamamoto Figure 1 Figure 3 @ Figure 4 Figure 5

Claims (1)

[Claims] The cassette main body 1 is provided with a cassette top lid 2 that can be freely opened and closed to form a paper feed chamber TF having a paper outlet 3t, and a paper feed member 4 for feeding paper into the paper feed cassette, and a drive for the paper feed member 4tl. A paper feeding device characterized in that it is provided with a motor 7 that rotates the paper.