JPS58194073A - Elecrophotographic copying machine - Google Patents

Abstract

PURPOSE:To exclude paper jamming and to facilitate inspection by providing one of a couple of rollers of a fixing device in a paper feeding unit attachable and detachable to and from a main body. CONSTITUTION:The paper feeding unit 2 is provided with the press roller 7, paper dish 8, feed roller 9, register roller 11, electrifying corotron 10 for transfer, etc., of the developing device, and is attachable and detachable to and from the main body 1. When the unit is attached to the copying machine body 1, the press roller 7 presses on a heat roller 6. In case of paper jamming, this paper unit 2 is drawn out to separate respective devices such as the heat roller 6, pressure roller 7, and transfer part from a drum 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an electronic copying machine, specifically a fixing device, in which a paper g
The present invention relates to an electronic copying machine that is designed to easily remove copy paper that has caused the problem.

Generally, an electronic copying machine uses a fixing device to fix the toner image transferred from the photoreceptor to the copy paper onto the copy paper. The copy paper is conveyed while being sandwiched between these rollers, and during this conveyance, the toner image is heat-pressed onto the copy paper and fixed.However, In conventional copying machines, the heat roller and pressure roller of the fixing device are installed in the same unit and cannot be separated, so there is a possibility that the copy paper may become jammed due to an accident during transportation. When this happens, it is not easy to remove the jammed copy paper.For example, if you try to forcefully remove the copy paper, the copy paper will tear and the pieces will remain in the multilayer device, or the copy paper will be damaged. There were cases in which burns were caused by contact with the Vζ heat roller during which all paper was removed.

The present invention has been made in consideration of these points, and an object thereof is to provide an electronic copying machine 4f& that can easily remove copy paper jams that occur in the fixing device.

In order to achieve this object, the electronic photographing machine of the present invention has a paper feed unit that is detachable from the main body, and one of the pair of rollers of the fixing device is installed in the print paper feed unit. is considered to be the % mold of its +## growth.

In this way, in the present invention, the paper feed unit is removably attached to the main body, and one roller of the fixing device is mounted in the M feed unit with the FC, so that paper jams do not occur in the fixing device. Even if this occurs, the fixing device can be separated by separating the paper feeding unit from the main body, so that the copy paper stuck in the fixing device can be easily removed.

Embodiments of the present invention will now be briefly described with reference to the drawings. FIG. 7 is a schematic diagram showing one embodiment of an electronic copying machine according to the present invention.

This electronic copying machine is composed of a main body 1 and a paper feed unit 2 that includes a paper feeding and paper feeding device.

In the main body 1, a photoreceptor drum 3, a current #1 device 4, etc. are arranged. The fixing device 5 is disposed near the exit of the electronic copying machine, and is composed of a heat roller 6 containing a heat roller and a pressure roller 7 that comes into pressure contact with the heat roller 6.

Of these λ rollers 6.7, the heat roller 6 is attached to the main body 1, and the pressure roller 7ri is shelled in the paper feeding Schnitt 2. In addition to this pressure roller, the paper feed unit 2 also includes a tray 8 which holds a stack of copy sheets or sheet stacks, and which is in contact with the sheet stack and carries the uppermost copy paper sheet (tray). 8
A feed-out roller 9 for sending out the copy paper, a register roller 11 for aligning the leading edge of the copy paper being sent, and sending the copy paper to a charging roller 10 for transfer in accordance with the movement of the toner image are installed.

The main body 1 and paper feeding Schnitt 2 of this copying machine are connected as shown in FIG. 7 during copying. In the combined state, the heat roller 6 and the pressure roller 7 are in pressure contact with each other. In the state shown in FIG. 1, when the copying cycle is completed, the photoreceptor 3 is rotated N, and the steps of charging, exposure, and development are sequentially executed to form a toner image on the photoreceptor 3. On the other hand, the copy paper in the paperback tray 8 is fed by the reversing roller 9, passes through the register roller 11, and passes between the surface of the photoreceptor drum 3v) and the charging corotron 10 for transfer, where the toner image is formed. The toner is transferred onto the copy paper, conveyed into the fixing device f5, and while passing between the heat roller 6 and the pressure roller 7, the toner 1 is fixed onto the copy paper.

In the copying process shown in FIG. 7, when a paper jam occurs, the copying cycle is automatically stopped and the operator is informed that a paper jam has occurred.

When there is an indication that a paper jam has occurred, the operator pulls out the paper feed unit 2 in the direction of the arrow as shown in Fig. Separate. When the main body 1 and the paper feeding unit 2 are separated as shown in FIG.
Since the pressurized state is released and the copy paper is separated, the copy paper sandwiched between the heat roller 6 and the pressure roller 7 can be easily removed. To resume the copying operation, push the paper feed unit 2 into the main body 1 in the opposite direction of the arrow to return it to the state shown in FIG. In order to return the paper feed unit 2 to its original copying state, the main body 1 and the paper feed unit 2 are positioned and fixed using a suitable positioning and fixing device (not shown). In order to make it easier to attach and detach the unit from the main body, install a suitable guide rail (
(not shown) is provided, and the paper feed unit 2 is pulled out or pushed in along this guide rail.

As described above, in the Korei copying machine of the present invention, the paper feeding unit 5 is detachably attached to the main body, and one of the pair of rollers of the fixing device is installed in the paper feeding unit.
Therefore, paper jam removal and other inspection operations can be easily performed. Furthermore, paper jams at the contact points between the main body and the paper feed unit, such as paper jams near the transfer corotron, can be easily removed. In addition, by pulling out the paper feed unit, there is an additional effect that parts replacement and maintenance work become easier.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an electronic copying machine according to the present invention when a copy is being taken, showing a state in which a paper feeding Schnitt and a main body are combined. FIG. 2 is a schematic diagram of the electronic copying machine of the present invention when removing a paper jam, showing a state in which the paper feeding unit and the main body are separated. 1... Copying machine main body, 2... Paper feed unit, 3...
・Photosensitive drum, 4...Developing device, 5...Fixing device, 6°...Heat roller, 7...Pressure roller, 8...
・Beno f) L/I, 9...Feeding roller, 1
0... Charging corotron for transfer, 11... Aligning roller. Figure 1 Figure 2

Claims (1)

[Claims] An electronic copying machine characterized in that a boat speed p unit is detachable at all times, and one of a pair of rollers of a fixing device is installed in the paper feeding unit.