JP3677154B2 - Ventilation device for image forming apparatus and image forming apparatus using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ventilation device for an image forming apparatus such as a copying machine, a printer, a facsimile machine, etc., for discharging ozone generated in a photoconductor unit containing a photoconductor to the outside of the main body of the image forming apparatus.
[0002]
[Prior art and problems to be solved by the invention]
In an image forming apparatus such as a copying machine, a ventilating device is generally provided in order to surely discharge ozone generated during image formation and excess heat generated by a heating element to the outside of the apparatus and to suck air into the apparatus. It has become.
[0003]
Among such ventilation devices, an apparatus used in an image forming apparatus that is detachably equipped with a photosensitive unit having a built-in charging charger is a generating unit in order to efficiently process ozone generated by the charging charger. It is necessary to configure so that there is no gap in the duct from the photoreceptor unit to the exhaust part. On the other hand, in order to make the photosensitive unit containing the charging charger detachable from the main body of the image forming apparatus, a sponge is attached to the end surface of the duct so as to fill the gap between the duct and the photosensitive unit. .
[0004]
However, in the case where the configuration has to be removed along the axial direction of the photosensitive drum containing the photosensitive unit, when the photosensitive unit is set in the image forming apparatus main body, the end surfaces of the photosensitive unit and the duct are rubbed. As a result, the sponge affixed to the end face of the duct may be torn off and fall on the transfer belt located on the lower side of the photoconductor unit, thereby adversely affecting the formed image.
[0005]
[Means for Solving the Problems]
Among the ventilation devices of the image forming apparatus according to the present invention, the one according to claim 1 includes a photoconductor and the like in a photoconductor unit that is detachable from the image forming apparatus main body along the axial direction of the photoconductor. a duct for discharging the generated ozone to the outside, a ventilation device of an image forming apparatus comprising disposed along a axial direction of the photoreceptor, the surface that makes come in contact with the photosensitive member unit of the duct and attaching a sponge, the surface of the sponge, characterized by comprising setting only a separate member of the membrane body to eliminate the above-described sponge is torn off.
[0006]
The ventilation device of an image forming apparatus according to claim 2, in addition to the above film structure, the upper Symbol photosensitive member unit and the front edge of the image forming apparatus as a rush side in doing so dressed to the image forming apparatus main body A buffer film body that covers the sponge together with the film body is provided at a site .
[0007]
Further, the image forming equipment according to claim 3, characterized by using a ventilating device of the image forming apparatus according to claim 1 or 2.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing an embodiment of a ventilation device of an image forming apparatus according to the present invention. In the figure, 1 is a photosensitive unit, 1a is a drum shaft, 2 is a charging charger, 3 is a main duct, 4a is a sponge that closes the gap with the photosensitive unit, 4b is a mylar affixed to the sponge 4a, 5 is a main fan, 6 is an exhaust duct, 7 is an intake duct, 8 is a fixing unit, and 9 is a transfer belt.
[0009]
In this embodiment, in order to process the ozone generated in the charging charger 2 and the heat in the fixing unit 8, the air taken in from the intake duct 7 is passed through the photosensitive unit 1, and the ozone generated in the photosensitive unit 1. The air in the machine warmed by the heat of the fixing unit 8 is drawn by the main duct 3 and discharged from the exhaust duct 6 to the outside by the main fan 5.
[0010]
The sponge 4a is affixed to the attachment end surface of the main duct 3 to the photosensitive unit 1 so as to fill a gap with the photosensitive unit 1, and a thin film body is formed on the surface thereof, that is, the surface on the photosensitive unit 1 side. Mylar 4b is attached.
[0011]
The photoconductor unit 1 can be detached from the front side of the image forming apparatus main body (not shown) for replacement (indicated by the arrow X in the figure), and is set parallel to the drum shaft 1a from above the mechanism. Must. For this reason, when the photoreceptor unit 1 is set, the photoreceptor unit 1 is inserted while being pressed against the sponge 4a of the main duct 3. However, since the mylar 4b is attached to the surface of the sponge 4a, the sponge 4a. Can be set without tearing, the torn sponge does not fall on the transfer belt 9, and image defects do not occur.
[0012]
In the present invention, the film body provided on the surface of the sponge is not limited to Mylar, and any film body can be adopted as long as it is a separate film body from the sponge.
[0013]
FIG. 2 is a perspective view showing another embodiment of the ventilation device of the image forming apparatus according to the present invention. In the figure, reference numeral 10 denotes a buffer mylar, which is provided at the front end edge of the image forming apparatus main body which is the entry side when the photosensitive unit 1 is attached so as to cover this edge portion. For this reason, in the present embodiment, when the photosensitive unit 1 is set, even if the photosensitive unit 1 is pressed against the front edge of the sponge 4a from the side, the buffer mylar 10 is provided. The sponge 4a is not torn off. In the illustrated example, the mylar 4b is provided on the surface of the sponge 4a of the main duct 3, and the buffer mylar 10 is also provided. However, the same reference numerals are given to the parts common to the previous embodiment, Further, since the operation other than the above is also the same, redundant description is omitted.
[0014]
【The invention's effect】
As described above, the ventilation device of the image forming apparatus according to the present invention has a surface on at least a part of a surface of the duct that contacts the photosensitive unit of the duct for discharging ozone generated in the photosensitive unit to the outside of the apparatus. A sponge with a separate film member is affixed to fill the gap with the photoconductor unit, so when setting the photoconductor unit against the sponge, the photoconductor unit There is no direct contact with the surface, so that the sponge is not torn off during setting, does not fall on the transfer belt, and does not cause image defects.
[0015]
In the ventilation device of the image forming apparatus according to the second aspect, as described above, the film body provided on at least a part of the surface of the duct in contact with the photosensitive unit is mounted at least on the image forming apparatus main body of the photosensitive unit. In addition to the common effects described above, the film body can be used as a cushioning material even when the photosensitive unit is pressed from the lateral direction on the front side of the sponge when setting the photosensitive unit. This has the effect that the sponge is not torn off.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a ventilation device of an image forming apparatus according to the present invention.
FIG. 2 is a perspective view showing another embodiment of the ventilation device of the image forming apparatus according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Photoconductor unit 1a Drum shaft 2 Charger charger 3 Main duct 4a Sponge 4b Mylar 5 Main fan 6 Exhaust duct 7 Intake duct 8 Fixing unit 9 Transfer belt 10 Buffer mylar

Claims (3)

A duct for discharging ozone generated in the photoconductor unit, which contains a photoconductor and the like and can be attached to and detached from the image forming apparatus main body along the axial direction of the photoconductor, is provided on the axis of the photoconductor. a ventilation device of an image forming apparatus comprising disposed along a direction, attached to a sponge on a surface that makes come in contact with the photosensitive member unit of the duct, the surfaces of the sponge eliminates the aforementioned sponge is torn ventilation device of an image forming apparatus characterized by a separate member of the film body formed by setting only for. In addition to the above film structure, the upper Symbol photosensitive member unit at the site to be the front edge of the image forming apparatus as a rush side in doing so dressed to the image forming apparatus main body, buffer covering the sponge by the film body The ventilating device for an image forming apparatus according to claim 1, wherein the film body is provided. An image forming apparatus using the ventilation device of an image forming apparatus 請 Motomeko 1 or 2.

Images