JPH03137653A - Picture recorder - Google Patents

Abstract

PURPOSE:To facilitate replacement of each unit by providing positioning projections on the lower part of a recorder that can be bisected, arranging a fitting plate equipped with each unit so as to correspond with the projections, and pressing and stabilizing the recorder by a spring member, etc., on the upper part. CONSTITUTION:To put together the upper and lower parts 1a and 1b of the picture recorder, the part 1a is pressed down to put a hook 9 over a pin 10 on the lower part 1b. A fixing unit 5 and a transfer belt unit 4 are pressed by a pressure spring 8 and a photosensitive drum 1, respectively, whereby they can operate stably. At the time of maintenance and checking, the hook 9 is removed from the pin 10, and the part 1a is pulled up to pull out a unit fitting plate 6. Then, units 4 and 5 can be simultaneously removed. When the fresh fitting plate 6 equipped with the units 4 and 5 in advance is inserted into positioning projections 7a and 7b, the old one is replaced with the new one, which can be fit in a home position.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an image recording apparatus having a structure in which the main body of the apparatus can be divided into upper and lower halves.

(Prior Art) In image recording devices such as electrophotographic copiers and printers that record images using an electrophotographic process, when recording paper becomes jammed inside the device during a recording operation, it is easy to remove the jammed paper. There is a known structure in which the main body of the device can be divided into upper and lower halves with a hinge.

In this type of image recording apparatus, especially those that record color images, a transfer belt is used to ensure reliable transfer of the color visible image formed on the photoreceptor drum onto recording paper. There is. In conventional devices, this transfer belt unit is screwed together with the fixing unit to the lower part of the device body, which is divided into two parts. Therefore, in order to replace the unit during maintenance and inspection, the screws must be removed and removed in order. Therefore, the task of replacing the unit was extremely troublesome.

(Object and Structure of the Invention) The present invention has been made in view of the above points, and aims to facilitate the replacement of units during maintenance and inspection. A positioning protrusion is provided on the lower part, and the mounting plate to which the transfer belt unit and fixing unit are attached in advance is placed on the lower part of the apparatus main body by aligning it with this positioning protrusion, and the upper part of the apparatus main body is pushed down to lower it. When integrated with the upper part, the fixing unit is pressed by the spring member provided on the upper part, and the transfer belt unit is pressed by the photosensitive drum.

(Example) The present invention will be explained below based on the drawings.

1 and 2 are schematic diagrams of an embodiment of an image recording apparatus according to the present invention, in which FIG. 1 shows a state in which the main body of the apparatus is divided into two parts, and FIG. 2 shows a state in which it is integrated.

As shown in the figure, the main body of the apparatus can be divided into an upper part 1a and a lower part ib by a hinge 2.Although not all are shown in the figure, the upper part 1a includes a photoreceptor drum 3, etc. A charging electrode, a developing device, a separation electrode, a cleaning device, etc. are attached to the surrounding area. On the other hand, the transfer belt unit 4 and the fixing unit 5 are attached to the lower portion ib via one unit mounting plate 6. The transfer belt unit 4 and the fixing unit 5 are attached to a unit mounting plate 6 in advance.

This unit mounting plate 6 is positioned from above by positioning protrusions 7a and 7b provided on the upper surface of the lower portion 1b. A pressure spring 8 is provided at a position corresponding to the fixing unit 5 on the upper portion 1a of the apparatus main body.

Upper part 1a and lower part 1b of the image recording device having the above configuration
In order to integrate the upper part 1a with the lower part 1b, push down the upper part 1a and attach the hook 9 provided on the upper part 1a.
is hooked onto the pin 10 provided on the lower part 1b. At this time, the fixing unit 5 is pushed down from above by the pressure spring 8, and the transfer belt unit 4 is pushed down by the photosensitive drum l.
Pressed by. In this way, when integrated, both the transfer belt unit 4 and the fixing unit 5 are stable, so there is no problem during the recording operation.

Now, at the time of maintenance and inspection, remove the hook 9 from the bin 10, pull up the upper part 1a, and pull out the unit mounting plate 6 upward, then transfer belt unit 4 and fixing unit 5
can be removed together. Therefore, in advance, transfer belt unit 4
By inserting a new unit mounting plate 6, which is used to attach the fixing unit 5 and the fixing unit 5, into the positioning protrusions 7a and 7b from above, the fixing unit 5 and the fixing unit 5 are fixed in position. In this way, the transfer belt unit 4 can be easily replaced with the fixing unit 5.

In the above embodiment, the unit mounting plate 6 is separate from the transfer belt unit 4 and fixing unit 5, but
A part of the attachment member of the transfer belt unit 4 or the fixing unit 5 may be used.

(Effects of the Invention) As explained above, in the present invention, a positioning protrusion is provided on the lower part of the apparatus main body which can be divided into two, and a mounting plate on which a transfer belt unit and a fixing unit are attached in advance is aligned with this positioning protrusion. and place it on the lower part of the device body,
When the upper part of the apparatus main body is pushed down and integrated with the lower part, the spring member provided on the upper part presses the fixing unit and the photosensitive drum presses the transfer belt unit. Raise the upper part of the main body, pull out the unit mounting plate with the transfer belt unit and fixing unit attached, and replace it with a new unit mounting plate with the transfer belt unit and fixing unit attached, aligning it with the positioning protrusion and lifting it up. You can easily replace the unit just by plugging it in.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the image recording apparatus according to the present invention divided into two parts, and FIG. 2 is a schematic diagram showing the same apparatus in an integrated state. 1a---Upper part, lb...Lower part, 3...Photosensitive drum, 4...Transfer belt unit, 5...Fixing unit, 6...Unit mounting plate, 8a, 7b.・
・Positioning protrusion, 8...suppression

Claims (1)

[Claims] In an image recording device that can be divided into two parts, an upper part and a lower part, a positioning protrusion is provided in the lower part, a spring member is provided in a position corresponding to the fixing unit in the upper part, and a transfer belt unit and a fixing unit are attached in advance to the unit. When the mounting plate is placed on the lower part in alignment with the positioning protrusion and the upper and lower parts are joined together, the spring member provided on the upper part presses the fixing unit, and the photosensitive member provided on the upper part presses the fixing unit. An image recording apparatus characterized in that a body drum is configured to press a transfer belt unit.