JPH03113468A - Image forming device - Google Patents

Abstract

PURPOSE:To decrease installing space and to facilitate extraction of image formed paper by providing paper ejecting tray which is provided along with an intermediate tray and is extractable from an operating side of the image forming device and a paper carrying part which selectively carries paper formed with the image to the intermediate tray or the paper ejecting tray. CONSTITUTION:The paper ejecting tray 7 which is provided along with the intermediate tray 6 and is extractable from the operating side of the image forming device 1, and a paper carrying part 5 which selectively carries the paper formed with the image to the intermediate tray 6 and the paper ejecting tray 7 are provided. Therefore, the paper formed with the image can be carried to the intermediate tray 6 or the paper ejecting tray 7 by the paper carrying part 5. Then the paper carried to the paper ejecting tray 7 is recovered by extracting it with the paper ejecting tray 7 to the operating side of the image forming device 1. Thus, the installing space can be decreased, and the extraction of image formed paper can be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an image forming apparatus having a double-sided image forming function and a composite image forming function.

<yAi+i that a conventional technology and invention are trying to solve>
The double-sided image forming function of an image forming apparatus guides paper with an image formed on one side to an intermediate tray provided inside the image forming apparatus, then refeeds the paper from the intermediate tray and prints the paper on the back side of the paper. The image is formed on the image. For example, when performing double-sided copying with an electrophotographic copying machine, the first document is placed on the contact glass surface for document placement, exposed optically, and one sheet of paper stored in the paper feeder is fed out and its surface is exposed. Image copy processing is performed on the image. This paper is led to the intermediate tray, taken out from the intermediate tray again, and the image of the second original is copied on the back side of the paper in synchronization with the timing of exposing the second original.

The composite image formation function allows image formation to be performed at two times per sheet of paper.
This process is performed more than once, and is realized by first leading the paper on which the image has been formed to an intermediate tray, and then refeeding the paper from the intermediate tray and forming an image on the surface on which the image has been formed. The difference from the double-sided image forming function is that the paper introduced into the intermediate tray is reversed, and other aspects are substantially the same.

By the way, the image forming apparatus equipped with the above-mentioned double-sided image forming function and composite image forming function can
A configuration is adopted in which paper is ejected onto the top surface of a paper ejection tray that protrudes to the side of the device body (for example, Japanese Patent Laid-Open No. 63-6086
(See Publication No. 1). Therefore, since the paper ejection tray protrudes, a large installation space is required, and there is a problem in that the image forming apparatus cannot be installed in a place where there is not enough space.

Further, since the paper ejection tray is disposed on the side of the image forming apparatus, there is a problem in that it is difficult to take out the paper on which an image has been formed and is ejected onto the paper ejection tray.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide an image forming apparatus that requires less installation space and can easily take out sheets on which images have been formed.

Means for Solving the Problems> To achieve the above object, the image forming apparatus of the present invention includes a paper output tray that is arranged in parallel with an intermediate tray and that can be pulled out to the operation side of the image forming apparatus, and The apparatus includes a paper transport section that selectively transports the formed paper to an intermediate tray and a paper discharge tray.

In addition, the other image forming apparatus includes a paper transport unit that guides paper on which an image is formed to the intermediate tray side, and a paper output tray that is arranged in parallel with the intermediate tray and that can be pulled out to the operation side of the image forming apparatus. , a lifting means for raising and lowering the intermediate tray and the paper discharge tray to selectively expose the downstream end of the paper transport section.

Effects> According to the former image forming apparatus, the paper on which the image has been formed can be carried into the intermediate tray or the paper discharge tray by the paper transport section.

Then, the paper carried into the paper discharge tray can be pulled out and collected together with the paper discharge tray toward the operation side of the image forming apparatus.

Further, according to the latter image forming apparatus, by raising and lowering the intermediate tray and the paper ejection tray by the lifting means, both can be selectively faced to the downstream end of the paper transport section, and the paper can be introduced into the paper transport section. carry the paper into the intermediate tray,
It can be carried into the paper output tray. Then, the paper carried into the paper discharge tray can be pulled out and collected together with the paper discharge tray toward the operation side of the image forming apparatus.

<Example> Hereinafter, embodiments will be described in detail with reference to the accompanying drawings showing examples.

FIG. 1 is a schematic diagram showing the internal structure of a copying machine as an image forming apparatus of the present invention.

This copying machine is equipped with a double-sided copying function and a composite copying function. A contact glass 11 is fixed to the upper part of the copying machine main body 1, and an optical system 2, a copying It is equipped with a processing section 3, a first paper transport section 4, an intermediate tray 6, a paper discharge tray 7, and the like.

The optical system 2 is composed of a light source 21, mirrors 22, 2324, lenses 25, and mirrors 26, 27, and 28,
A light source 21 illuminates an original (not shown) set on the contact glass 11, and the reflected light from the original is transmitted to mirrors 22, 23, 24, lens 25, and mirror 2.
6.27.28 so that it can be led to the copy processing section 3.

The copy processing section 3 includes a photosensitive drum 3 that rotates in one direction.
1, a charging charger 32, a blank lamp 37
, a developing device 33, a transfer charger 34, a separation charger 35, and a crease 36 are arranged in this order. By forming an image with light, an electrostatic latent image corresponding to the original image is formed, and unnecessary parts are removed by a blank lamp 37, and the electrostatic latent image from which unnecessary parts are removed is turned into a toner image by a developing device 33. The transfer charger 34 transfers the toner image to paper P.
After the paper P is separated from the surface of the photosensitive drum 31 by a separation charger 35, the remaining toner is collected by a cleaner 36.

The first paper transport unit 4 includes a paper feed roller 41 that feeds paper P one sheet at a time from a paper feed cassette 13 that is removably mounted at a predetermined position in the copying machine main body 1. It has a paper feed path 42, registration rollers 43, a conveyance guide 44, and a heat fixing device 45.

Further, on the downstream side of the first paper transport unit 4, a second paper transport unit 5 is provided for selectively transporting the paper P on which an image has been copied into the intermediate tray 6 and the paper output tray 7. It is being This second paper transport section 5 includes the heat fixing device 45
a switching claw 51 provided downstream of the paper P, a first guide path 52 that temporarily introduces the paper P, and a transport roller 5 that carries the paper P into the first guide path 52 and reversely transports the paper P that has been carried in.
3. A second guide path 54 for guiding the paper P to the intermediate tray 6 side, a conveyance roller 55 for carrying the paper P into the intermediate tray 6, and a transport roller 55 branching from the second guide path 54 to eject the paper P. A third guide path 56 for guiding the paper P to the paper tray 7, a transport roller 57 for transporting the paper P to the paper output tray 7, and a transport roller 57 for distributing the paper P to the intermediate tray 6 side and the paper output tray 7 side. It is composed of a switching claw 58 and the like.

Further, downstream of the intermediate tray 6, the intermediate tray 6
A third paper conveying section 8 is provided which sends out one sheet of paper P from there and guides it to the copy processing section 3 again. This third paper conveying section 8 includes a refeeding roller 81 that feeds out the paper P stored in the intermediate tray 6, and a fourth sheet feeding roller 81 that guides the sheet P sent out by the refeeding roller 81 to the registration roller 43. It is composed of a guide path 82 and the like.

The paper ejection trays 7 are arranged below the intermediate tray 6, and as shown in FIG.
It is supported by a guide rail 71 that can move forward and backward from the inside of the copying machine main body 1 toward the operation side.

The operation of the copying machine having the above configuration is as follows.

First, when performing a copying operation only once on one sheet of paper P, the paper P that has passed through the heat fixing device 45 is introduced into the second guide path 54 by the switching claw 51, and then the switching claw 58 3 into the guide path 56 and carried into the paper discharge tray 7.

When double-sided copying is performed on one sheet of paper P, following front-side copying, the paper P is once introduced into the first guide path 52 by the switching claw 51, then reversely transported by the conveyance roller 53, and then transferred to the second guide path 52. The paper is carried into the intermediate tray 6 through the guide path 54, taken out from the intermediate tray 6 by the third paper conveyance section 8, conveyed to the registration rollers 43, and then fed to the copy processing section 3 by the registration rollers 43. ,
Image formation is performed on the back side. Furthermore, when performing a composite copying operation on one sheet of paper P, following one-sided copying, the paper P is not introduced into the first guide path 52 but directly into the guide path 5 of section 2.
4, the paper is introduced into the intermediate tray 6, and the paper is taken out from the intermediate tray 6 by the third paper transport section 8, and an image is formed on the same surface. Then, after the paper P on which the double-sided copying and composite copying have been completed is introduced into the second guide path 54, the sheet P is transferred to the switching claw 58.
The paper is introduced into the third guide path 56 and carried into the paper discharge tray 7. The paper carried into the paper discharge tray 7 can be pulled out and collected together with the paper discharge tray 7 toward the operation side of the copying machine.

In this way, in the copying machine described above, since the paper discharge tray 7 is provided inside the copying machine main body 1, the installation space for the copying machine can be reduced. Further, since the sheets that have been copied can be collected on the operation side of the copying machine main body 1, the collection work can be easily performed.

FIG. 3 is a schematic diagram showing another embodiment, and the difference from the previous embodiment is that instead of configuring a third guide path 56, a conveyance roller 57, and a switching claw 58, an intermediate tray 6 and a paper ejection The trays 7 are raised and lowered by the lifting means 9 so that they alternately face the conveying roller 55 at the downstream end of the second guide path 54.

According to this embodiment, by lowering the intermediate tray 6 and the paper discharge tray 7, the intermediate tray 6 is moved to the transport roller 55.
The paper P can be carried into the intermediate tray 6 while facing the intermediate tray 6. Further, by raising the intermediate tray 6 and the paper discharge tray 7, the paper discharge tray 7 can face the conveyance roller 55, and the paper P can be carried into the paper discharge tray 7.

The elevating means 9 may include a rack, a binion, etc.
Known mechanisms for converting rotational motion into reciprocating motion can be employed. Alternatively, a chain may be used to lift or lower the intermediate tray 6 and the paper discharge tray 7. Further, in this embodiment, the paper ejection tray 7 is completely inserted into the interior of the copying machine main body 1 so that the paper ejection tray 7 does not interfere with the front cover of the copying machine main body 1 during the above-described elevation.

The image forming apparatus of the present invention is not limited to the above embodiment, and for example, the second paper conveyance section 5 in FIG.
In this case, instead of configuring the third guide path 56, the conveyance roller 57, and the switching claw 58, the paper P that has passed through the conveyance roller 55 is transferred to the intermediate tray 6 and the paper output tray 7 downstream of the conveyance roller 55. configuring switching claws to distribute the
Various design changes can be made.

<Effects of the Invention> As described above, according to the image forming apparatus of the present invention, the paper ejection tray for storing the paper on which the image has been formed is provided inside the copying machine main body, so that the paper ejection tray is not connected to the apparatus. The installation space can be reduced compared to conventional image forming apparatuses that protrude from the sides of the image forming apparatus.

Moreover, since the paper on which image formation has been completed can be pulled out to the operating side of the apparatus and collected together with the paper discharge tray, a unique effect is achieved in that the collection work can be easily performed.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the internal structure of a copying machine as an image forming apparatus of the present invention, FIG. 2 is a perspective view of the same, and FIG. 3 is a schematic diagram showing another embodiment. DESCRIPTION OF SYMBOLS 1... Copying machine main body, 5... 2nd paper conveyance part, 6...
... Intermediate tray, 7... Paper output tray, 9... Lifting means, P... Paper.

Claims (1)

[Claims] 1. In an image forming apparatus in which a sheet on which an image has been formed is temporarily stored in an intermediate tray and then taken out from the intermediate tray to form an image again, , and includes a paper discharge tray that can be pulled out to the operation side of the image forming apparatus, and a paper transport section that selectively transports paper on which an image is formed to an intermediate tray and a paper discharge tray. Forming device. 2. In an image forming apparatus that temporarily stores paper on which an image has been formed in an intermediate tray and then takes it out from the intermediate tray to form an image again, a paper that guides the paper on which an image has been formed to the intermediate tray side. a conveyance section, a paper output tray that is arranged in parallel with the intermediate tray and can be pulled out toward the operation side of the image forming apparatus, and a paper output tray that is selectively placed at the downstream end of the paper conveyance section by raising and lowering the intermediate tray and the paper output tray. An image forming apparatus characterized in that it is equipped with a lifting means for raising and lowering the image.