JPH02239036A - Image forming device - Google Patents

Abstract

PURPOSE:To simplify the structure of the paper feeding and carrying guide of an attachment unit to improve assembling property and to reduce the cost of a device by supplying all paper sheets from the attachment unit via only one paper feeding port of a main body. CONSTITUTION:An option paper feeding means 91 which supplies paper sheets to a main body 31 having an image forming means and a recopy paper sheet feeding means 92 which supplies recopy paper sheets are constructed in such a way that paper sheets are supplied via the same paper sheet feeding port 80 provided at the main body. Consequently, the paper sheet feeding and the conveying guide of an attachment unit 32 containing the option paper sheet feeding means 91 and the recopy paper sheet feeding means 92 are simplified, assembling work becomes easy and the cost is reduced.

Description

Detailed Description of the Invention [Object of the Invention] (Industrial Application Field) The present invention relates to an image forming apparatus in which an additional unit incorporating functional means such as an optional paper feeder is attached to the main body. Regarding improvements.

(Prior Art) Recently, image forming apparatuses that form images on manuscripts and the like are required not only to simply form images, but also to have various functions and options. In order to meet this demand, additional units containing these functions are being attached to the main body to expand the functionality. This will be explained using an example of an electronic copying apparatus. In Fig. 3, reference numeral 1 denotes the main body, and the paper fed out from the paper cassette 2 is sent to the photosensitive drum 4 via the registration roller 3, the image is transferred, the image is fixed by the fixing roller 5, and the paper is ejected. The paper is ejected through the rollers 6, and by switching the gate 7, it is sent to the tray 8 and sent to the tray or downward.

Reference numeral 11 denotes an additional unit, which incorporates an optional sheet feeding means 12 as a functional means and a re-copying sheet feeding means 13 (hereinafter referred to as ADD). The paper feed means 12 is
It is equipped with an optional force set 14, and the paper P from this optional force set 14 is placed in the obscene paper feed guide 1.
5, and is sent to the registration rollers 3 via an optional paper feed port 16 provided in the main body. Further, the ADD 13 is a paper feeding means for feeding the paper P, which has already been copied, to the photosensitive drum 4 again, and further forming an image on the back side (or even the front side) of the paper P. The copied paper P is temporarily stored in the stacker 18 via the ADD storage guide 17, and then passes through the ADD transport guide 19, the ADD paper feed guide 20, the ADD paper feed port 21 provided in the main body 1, and is transferred to the registration roller 3. That is, the sheets from the additional unit 11 are sent to the main body 1 through separate paper feed ports 16 and 21, respectively.

In this way, each paper feed guide 15.20 of the additional unit 11
In response to this, the main body 1 is provided with a plurality of paper feed ports 16, 21, and the structure of the paper feed and conveyance guide is complicated, requiring skill and time to assemble. This has the disadvantage of being expensive, and there is also the fear that reliability may be reduced due to jams (paper jams) and the like.

(Problems to be Solved by the Invention) As described above, conventional image forming apparatuses have the disadvantages that the structure of the paper feed and conveyance guide of the additional unit is complicated, the workability of assembly is poor, and the assembly is expensive. Ta.

The present invention was made to eliminate the above-mentioned disadvantages, and has a simple structure, good assembly workability, and
The purpose is to provide an inexpensive image forming device.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a main body having an image forming means for forming an image of a document on paper, an obscene paper feeding means for supplying paper to the main body, and the main body. In the image forming apparatus, the optional paper feeding means and the repeating paper feeding means are provided in the main body, and an additional unit is attached to the main body. The image forming apparatus is characterized in that the above paper is fed through the same paper feed port.

(Function) In the present invention, all paper is fed from the additional unit through one paper feed port on the main body, so the paper feeding and conveyance guide of the additional unit is simplified, and assembly is easy. and is inexpensive.

(Examples) Hereinafter, details of the present invention will be explained using examples shown in FIGS. 1 and 2.

First, a first embodiment will be described with reference to FIG.

The electronic copying apparatus of this embodiment includes a main body 31 and an additional unit 32.

Regarding the main body 31, a document glass 36 is attached to the upper surface of the main body frame 35. A document supply means 37 is provided on the right side of this figure, and the three documents on the tray 38 are taken out by a big up roller 40, and a feed roller 41, a registration roller 4,
2, the document is sent to the document glass 3 by the carry-out conveyor 43.
6. A document discharge means 42 is provided to the left of this, and the three copied documents are sent to the document discharge means 44 by a carry-out conveyor 43 and are discharged. Below the original glass 36 is a scanning means 50.
is provided. This includes an exposure light source 51 and a mirror 52.
．． 53, .
2 are tied in sequence on top.

The image forming means 61 has the photoreceptor drum 62 that rotates, and around the photoreceptor drum 62 there is a developer 1g 63 and a transfer charger 8.
164, a cleaner 65, a static eliminating light source 66, a charging bar 67, and the like are provided. Then, the latent image of the optical image is developed by the developer 63.
It is made into a visible image.

On the other hand, paper P from the cassette 71a of the paper supply means 71
is sent by a feed roller 72 and a registration roller 73, the image is transferred by a transfer charging roller 64, and sent to a paper discharge means 75 via a fixing roller 68. Here, when the gate 77 is in the illustrated position, the paper P discharged by the paper discharge roller 76 is sent downward through the paper discharge guide 78a, and when the gate 77 is in the horizontal position shown by the broken line, Tray 7
The paper is ejected to 8b. Further, a paper feed port 80 is opened in the bottom plate 79, and a paper conveyance guide 81 extending from the paper feed port 80 to the registration rollers 73 is provided.

Furthermore, the manual conveyance guide 82 is provided with a guide piece 83 extending in a direction perpendicular to the plane of the paper, and a guide groove 84 is attached to the lower surface of the developer 1163 in correspondence with this guide piece 83 . With these fittings, the developer 1!63 can be accurately inserted and attached without contacting the photoreceptor drum 62.

Next, the additional unit 32 will be described.

This is provided with an optional paper feeding mechanism 91 and an automatic duplexing mechanism (hereinafter abbreviated as ADD) 92 as functional means.

First, the optional paper feeding mechanism 91 includes an optional cassette 95, a big up roller 96 that approaches and separates from the paper P stored therein, a feed roller 97, a separation roller 98, and one end of which is opened at the paper feeding port 80. Optional paper feed guide 9
It consists of 9 etc.

The ADD 92 includes an accommodation conveyance guide 101 whose upper end opens to the paper ejection guide 78a and whose other end opens to the stacker 100 that accommodates the paper P, a pickup roller 102, a feed roller 103 that feeds the paper P from now on, and a feed roller 103.
A separation roller 104 that is driven with low torque in the opposite direction to the rotational direction of the feed roller 103 and follows the rotational direction of the feed roller 103 if the paper P is fed one sheet, and an AD that guides the paper P upward.
It consists of a D conveyance guide 105, an upper feed roller 106, an ADD paper feed guide 107 whose one end is open to the paper feed port 80, and the like.

Next, the operation when double-sided copying is performed using the additional unit 32 will be explained.

The paper P in the obscuring cassette 95 is taken out by a pickup roller 96, separated into only one sheet by a separation roller 98, sent upward by a feed roller 97, and passed through an optional paper feed guide 99 to a paper feed port 80. reach

From here, it enters the main body 31, passes through the paper conveyance guide 81, reaches the transfer charge 1l64 of the photoreceptor drum 62, is transferred there, passes through the fixing roller 68, completes the first copying, and then passes through the paper ejection roller 76 and ejection. After passing through the paper guide 78a, it enters the ADD storage guide 101 as recopy paper P, and is placed in the stacker 1.
00 with the copied side facing up, in preparation for the second copy. Next, by the operation of the pickup roller 102, the re-copy paper P is taken out, and the feed roller 103,
It passes through the clamping portions of the separation rollers 104, passes through the ADD conveyance guide 105, and reaches the upper feed roller 106. Then, it passes through the 800 paper feed guide 107, enters the main body 31 from the paper feed port 80, enters the paper conveyance guide 81, and register rollers 73.
The image is then transferred to a transfer charger 1164, fixed by a fixing roller 68, and ejected to a tray 78b via an ejection roller 76.

In this embodiment, double-sided copying has been described, but multiple copies may be made on one side.

Next, a second embodiment will be described with reference to FIG.

This embodiment differs from the first embodiment only in some of the parts shown in FIG. 2, and the other parts are the same, so the same parts are given the same reference numerals and their explanation will be omitted. That is, the other end of the optional paper feed guide 9l9b, which has one end opened near the feed roller 97 of the optional paper feed means 91, is not opened in the paper feed port 80, but is opened in the ADD conveyance guide 105, and its position is set in the upper feed direction. It is below the roller 106. The paper P from the option cassette 95 is sent out and enters the ADD transport guide 105, passes through the ADD paper feed guide 107, passes through the paper feed port 80, and is sent to the main body 31.

This configuration further simplifies the process, and since the feed roller is inserted into the conveyance guide, there is an effect of easing paper size restrictions.

[Effects of the Invention] As detailed above, the image forming apparatus of the present invention has one paper supply port from the additional unit to the main body, and each transport guide is simplified, so the configuration is simplified. It is easy to assemble and is inexpensive.

[Brief explanation of drawings]

FIG. 1 is an overall block diagram of a first embodiment of the present invention, FIG. 2 is a block diagram of essential parts of the second embodiment, and FIG. 3 is a block diagram of a conventional example. P...Paper, 31...Body, 32
......A.1 addition unit, 39...Document, 61...Image forming means, 80...
・Paper feed slot, 91 optional paper feed means, 92... Re-copy paper feed means

Claims (1)

[Scope of Claims] A main body having an image forming means for forming an image of an original on paper, an optional paper feeding means for supplying paper to the main body, and a re-copy paper feeding means for supplying re-copy paper to the main body. In an image forming apparatus having a mochikatsu and an additional unit attached to the main body, the optional paper feed means and the re-copy paper feed means supply the paper through the same paper feed port provided on the main body. An image forming apparatus characterized by: