JPS62134656A - Image forming device - Google Patents

Abstract

PURPOSE:To facilitate removal of a troubled form and to make maintenance convenient by incorporating an inverting eject mechanism in a device body and arranging an image carrier and at least one process means in a process unit, and making this unit attachable to and detachable from the device body which can be divided into two. CONSTITUTION:A photosensitive drum 3, an electrifier 4, a destaticizer 7, and a cleaner 8 except a developing device 5 are built in a unit 10 as one body, and the unit 10 is made attachable to and detachable from an upper unit 1A of a device body 1. An inverting guide plate 11 and an eject roll 12 arranged behind a fixing device 9 are incorporated in the device body 1. The device body 1 can be divided vertically into two, namely, the upper unit 1A and a lower unit 1B through a hinge mechanism. Thus, troubled forms are removed easily even if the form is troubled by such as the generation of jam. Since the process unit 10 is made attachable and detachable, maintenance is convenient.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an image forming apparatus such as an electrophotographic recording machine or an electrostatic printing machine.

(Prior Art) Conventional image forming apparatuses employ a method in which a paper feed cassette is attached to one side of the apparatus main body, paper is conveyed linearly from the paper feed cassette, and the paper is ejected from the opposite side of the apparatus main body. However, not only was this extremely disadvantageous and inconvenient in terms of operability, but it also had the problem of requiring an unnecessarily large amount of installation space.

For this reason, a single-sided operation type image forming apparatus is provided in which the fed paper passes through a transfer section and a fixing section of the apparatus main body, is turned over once, and is ejected to a paper ejection section formed at the top of the apparatus main body. ing.

(Problems to be Solved by the Invention) However, in such a single-sided operation type image forming apparatus,
Since the paper reversal ejecting section is attached to the main body of the apparatus from the outside, the presence of the reversing paper ejecting section not only makes it difficult to downsize the main body of the apparatus, but also makes the main body of the apparatus itself an integral molded body. Therefore, when a paper trouble such as a paper jam occurs, it is difficult to easily remove the troublesome paper.

(Means for Solving the Problems) Therefore, the present invention was developed to effectively solve the above-mentioned conventional problems. , assuming that the image forming apparatus has a configuration in which the paper is inverted and output 1' to the discharge section.

A reversing paper discharge mechanism disposed after the fixing section is built into the apparatus main body, the apparatus main body is configured to be divided into at least two parts, and the image carrier and at least one other process means are built into the process unit. , a configuration is adopted in which the process unit is removably housed within the apparatus main body.

(Function) Therefore, in the present invention, since the reversing sheet discharge mechanism is built into the apparatus main body, not only can the apparatus main body be made as compact as possible, but also the apparatus main body can be divided into at least two parts. Therefore, even if a paper problem such as a paper jam occurs, by dividing the main body of the apparatus, it becomes possible to easily remove the troublesome paper.

Further, in the present invention, since the image carrier and its base are incorporated into the process unit, it is extremely convenient in terms of maintenance.

(Example) Hereinafter, the present invention will be described in detail based on an illustrative embodiment.

FIG. 1 is a schematic diagram showing an image forming apparatus of an electrophotographic recording machine according to the present embodiment. In the figure, 1 is the main body of the image forming apparatus, 2 is a laser head, and 3 is an image irradiated by the laser head 2. 4 is a 41F electric device that uniformly charges the photosensitive drum 3 and visualizes it; 5 is a developing device that develops the image with toner; 6 is a device that transfers the developed image onto paper. A transfer device, 7 is a static eliminator that removes the charge on the photosensitive drum 3, 8 is a cleaner that removes the remaining amount of toner on the photosensitive drum 3, and 9 is a fixing device that fixes the image transferred onto the paper. As shown in the figure, the image forming apparatus includes a relatively expensive and long-life developing device 5, and a photosensitive drum 3, a charger 4, a static eliminator 7, and a cleaner 8, which are integrated into a process unit 10. The process unit 10 is configured to be detachably housed in an upper unit to be described later.

In addition, 11 in FIG. 1 is a reversing guide plate disposed after the fixing device 9;
Reference numeral 12 denotes a discharge roller for discharging the paper reversed by the reversing guide plate 11 to the outside, and the discharge roller 12 and the reversing guide plate 11 are both built into the main body 1 of the apparatus and constitute a reversing sheet discharge mechanism for the paper. It is. As for the ejection roller 12, as shown in Figure 1, the end 13 of the apparatus main body 1 is made to protrude from the upper surface and is housed in the protruding end 13.

Therefore, in this embodiment, the paper P linearly conveyed from the paper feed cassette 15 to the transfer section via the paper feed roller 16 and registration roller 17 is developed onto the photosensitive drum 3 by the developing device 5. The imaged image is transferred by a transfer device 6,
The image will be fixed by the fixing device 9, but after passing through the fixing device, the conveying direction is reversed by the above-mentioned reversing guide @ 110, and the image is transferred to the upper part of the apparatus main body 1 via the ejection roller 12. Therefore, the receiver formed on the upper surface of the device main body 1 is directly discharged into the portion 14 in a face-down state.

Moreover, it is extremely convenient to eject the paper P in such a face-down state, since the image forming surface of the paper P faces down and is accumulated on the input pages.

Further, in this embodiment, as shown in FIG. 2, the apparatus main body 1 is of a split type consisting of an upper unit IA and a lower unit IB, so that the apparatus main body 1 can be divided into at least two parts, upper and lower. Although not shown in detail, the ends of the upper and lower units IA and IB are connected via a hinge mechanism so as to be openable and closable, and the process unit 10 and other process means are installed inside each unit as appropriate. The installation location shall be taken into account when accommodating.

Therefore, by making the device main body 1 of a split type.

Even if a paper problem such as a jam occurs, if the upper unit IA is released from the non-unit IA via the hinge mechanism, the troublesome paper can be easily removed, and the upper unit IA can be opened easily. Maintenance of process means, etc. is also greatly facilitated.

Moreover, in this embodiment, as described above, the photosensitive drum 3, the charger 4, the static eliminator 7, and the cleaner 8 are used in the process means.
Since it is integrated into the process unit 10 and housed in the upper unit IA in a detachable manner, such unitization also greatly improves maintenance.

(Effects of the Invention) As described above, the present invention provides an image forming apparatus that is arranged after the fixing section in an image forming apparatus configured such that the fed paper passes through the transfer section and the fixing section, is reversed, and is then discharged to the paper discharging section. This feature is characterized in that the reversing sheet ejecting mechanism is built into the apparatus main body, and the apparatus main body can be divided into at least two parts, so there is no need to attach the reversing sheet ejecting mechanism to the apparatus main body from the outside as in the past. Not only is it possible to make the device body itself as compact as possible, but the device body can be divided into at least two parts, so even if paper troubles such as paper jams occur, troublesome paper can be easily removed. As a result, the problems of the conventional system have been completely eliminated.

Furthermore, incorporating the image carrier and at least one other process means into a process unit and removably accommodating the process unit within the apparatus main body is compared to installing each process means individually into the apparatus main body. However, it has the advantage of being extremely convenient in terms of maintenance.

[Brief explanation of drawings]

FIG. 1 is a schematic view showing an image forming apparatus for an electrophotographic recording machine according to an embodiment of the present invention, and FIG. 2 is an external view showing an example of a divided state of the apparatus main body. 1...Image forming apparatus main body, IA...Upper unit, I
B...lower unit, 3...photosensitive drum (image carrier)
, 10... Process unit, 11... Reversing guide plate, 12... Discharge roll, P... Paper.

Claims (1)

[Claims] In an image forming apparatus configured such that the fed paper passes through a transfer section and a fixing section, is reversed and is ejected to a paper ejection section,
A reversing sheet discharging mechanism disposed after the fixing section is built into the apparatus main body, and the apparatus main body is configured to be divided into at least two parts, and an image carrier and at least one other
a process unit is assembled into the process unit, the process unit is removably housed within the apparatus body, an image carrier and at least one other process means are incorporated into the process unit, and the process unit is housed within the apparatus body. An image forming apparatus characterized in that the image forming apparatus is housed in a detachable manner.