JPS58190968A - Picture forming device - Google Patents

Abstract

PURPOSE:To eliminate completely ozone produced from a discharging means within a process kit, by providing a ozone eliminating means at the aperture part of the process kit which can be loaded to and unloaded from a picture forming device. CONSTITUTION:A process kit 17 contains a photosensitive drum 3, an electrostatic charger 6, a developing device 7, a cleaner 15 and an ozone eliminating filter 16 in a body. This kit 17 can be loaded to and unloaded from a main body C. When the kit 17 is loaded to the body C, the projected parts 17a and 17b of the kit 17 engage a guide 18 of the main body side to guide the kit 17. The filter 16 is provided at the aperture part outside the kit 17 and fitted oppositely to the position of an aperture 19 formed at the main body side when the kit 17 is loaded to the main body C.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image forming apparatus such as an electrophotographic copying machine or an image recording device.

Hereinafter, an explanation will be given using an electrophotographic copying machine as an example.

Conventionally, in electrophotographic copying machines, it is necessary to periodically replace the photoreceptor as a carrier, replenish developer, dispose of waste toner, clean charging wires, and replace and adjust various consumable parts. Yes, these services were carried out by professional service personnel. Therefore, a service person had to come each time, which was extremely troublesome and rare.

Recently, we have been developing photosensitive drums, developing devices, and cleaners.

It has been considered to reduce maintenance work by constructing a process kit that integrates image forming parts such as a charger, and replacing each unit at the same time when the photosensitive drum is replaced. With the above configuration, the user can easily replace each process-related unit that requires periodic maintenance, and the maintenance work by service personnel can be reduced.

However, discharge products such as ozone are generated by the charging means and accumulate in the process kit, which may cause a reaction with the surface layer of the photosensitive drum. the result.

The photosensitive drum may deteriorate and the image may smear,
Sometimes it becomes extremely unclear. Furthermore, the shield plate of the charger is also corroded, making the discharge unstable and causing problems such as image unevenness.

Therefore, there is a known method to exhaust ozone etc. through an ozone removal filter, but this ozone removal filter also deteriorates over time and needs to be replaced periodically. Conventionally, this replacement was done by a professional service person. was.

In order to solve the above-mentioned problems, the present invention provides an ozone removal means in the process kit, and configures the bulb so that the ozone removal means can be replaced at the same time as the process kit is replaced, thereby ensuring the removal of discharge products such as ozone. It also reduces the maintenance work for service personnel and eliminates the inconvenience of forgetting to replace the ozone removal means.

First, an embodiment of a copying machine to which the present invention can be applied will be described.

FIG. 1 shows a sectional view of the Enoki camera body C.

In the figure, reference numeral 1 denotes a document mounting table made of a transparent member, which reciprocates in the direction of the arrow. Reference numeral 2 designates a short focus and small diameter imaging element array, in which a document placed on the document table 1 is exposed to light emitted from light A4 and passed through a color sensitivity correction filter 5 having a heat insulating effect, and the document image is is slit-exposed onto the photosensitive drum 6. 6 is a charger, and a uniform fi is placed on the photosensitive drum 6.
This uniformly charged drum 6 is subjected to image exposure by the short focus small diameter imaging element array 2 to form an electrostatic image. This electrostatic latent image is then converted into an ls image by a secondary developer 7.

On the other hand, the sheet P of the set circle is fed onto the drum 6 by the feed roller 28 and the registration roller 9, which rotates at a timing that is synchronized with the image on the photosensitive drum 6, and then by the transfer unit 10. The toner image on the photosensitive drum 6 is transferred onto the sheet P. after that,
The sheet P separated from the drum 3 is guided by a guide 11 to a fixing device 12, where the toner image on the sheet P is fixed, and then discharged onto a tray 14 by a discharge roller 16.

In this embodiment, a photosensitive drum 6, a charger 6. A process kit 17 is constructed by integrally assembling the developing device O cleaner 15 and the ozone removal filter 16. This process kit 17Fi is provided so that it can be inserted into and removed from the main body C, and when it is loaded into the main body C, the protrusions 17a and 17b of the process kit 17 are engaged with the main body side guide 18 and guided.

The ozone removal filter 16 is provided in the opening of the exterior of the process kit 17, as shown in FIGS.
When the process kit 17 is attached to the main body C, it is arranged to face and match the position of the opening 19 provided on the main body side.

In addition, a threshold N/6a is provided between the temporary shield of the charger B in the process kit 17 and the kit exterior, and between the charger 6 and the photosensitive drum 6 in order to discharge ozone generated in the charger.
is provided. and.

The air around the charger is sucked by a fan 2° provided in the main body C, and is guided to the ozone removal filter 16 through the duct 21 between the space @ 4a and between the cleaner 15 and the exterior of the process kit 17. Opening 19 of main body Cll11
The air is exhausted as shown by the arrow in Figure 1. Further, ozone generated from the transfer charger 1o provided on the side of the main body C is also sucked in by the fan 2υ as shown by the arrow and exhausted through the ozone removal filter 16. Therefore, ozone is reliably removed by the ozone filter 16.

The air that entered the main body C from the process kit 17 is then exhausted to the outside of the main body C from the shaft end of the fan (the side perpendicular to the plane of the paper in FIG. 1) by the fan 20 along with the heated air around the light source 4. be done.

As described above, in the present invention, since the ozone removal means is provided in the opening of the process kit that can be inserted and removed from the main body of the image forming apparatus, the process kit described above can be removed by exhausting the air inside the process kit from this opening. Discharging means within (
ozone generated from the charger) can be reliably removed. Also.

When replacing the process kit, the ozone removing means can also be replaced at the same time, and the above-mentioned inconvenience caused by forgetting to replace the ozone removing means can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional front view of the image forming apparatus of the present invention, and FIG. 2 is a perspective view of a process kit that is detachably loaded into the apparatus. C is a main body, 6 is a photosensitive drum (image carrier), 6 is a charger (charger), and 16 is an ozone removal means. 17 is a process kit.

Claims (1)

[Claims] At least one image carrier, a discharging means for applying an electric charge to the image carrier, and a part or all of the image forming parts that form an image according to information on the image carrier are integrally assembled into the main body of the apparatus. It has a process kit that is self-made and detachable, and an ozone removal means held in the process kit, and when the process kit is attached to the apparatus main body, the air flow from the discharge means passes through the ozone removal means to the apparatus. An image forming device characterized by having a configuration in which the image is discharged outside the main body.