JPH05281797A - Process cartridge for image forming device - Google Patents

Abstract

PURPOSE:To provide a process cartridge for an image forming device, not having paper jamming between the process cartridge and a fixing device, while a transfer paper is carried. CONSTITUTION:In the process cartridge for the image forming device, integrally having an image carrier and at least, one or more of an electrostatic charging means, a transfer means, a cleaning means, and a destaticizing means, in the housing case of the process cartridge 1, and provided with a sending/carrying/ guiding member for the transfer paper 12 on the housing case, the sending/ carrying/guiding member 12 and a fixing entrance carrying/guiding member for the transfer paper 13 provided on the housing case of the fixing device 2, are provided so as to face each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process cartridge of an image forming apparatus using an electrophotographic process such as a copying machine, a printer and a fax machine.

[0002]

2. Description of the Related Art Since a process cartridge 1 of a conventional image forming apparatus is mostly the same as that of the embodiment of the present invention, it will be described with reference to FIG. It integrally has an image carrier 9, a charging charger 5, a transfer charger 8, a cleaning blade 11, a static eliminator 15 and the like in the housing 3 of the process cartridge.
A transfer sheet is supplied from a sheet feeding tray (not shown), a latent image is formed on the image carrier 9 by the charging charger 5 and the exposure 6, the latent image is visualized by the developing device 7, and the latent image is transferred to the transfer sheet. , The transfer paper carrying the unfixed image is separated by the roller
It is separated from the image carrier 9 by 10 and discharged. The transfer paper discharged from the process cartridge 1 is
The sheet is conveyed to the fixing entrance of the transfer sheet provided in the housing 4 of the fixing device, fixed and discharged. In such a process cartridge 1, a housing 3 is provided with a delivery conveyance guide member 12 projecting in a rib shape, and in order to reduce rubbing of an unfixed image on a transfer paper, a minimum necessary number is provided. Absent. The transfer paper entrance of the housing 4 of the fixing device 2 is also provided with a large number of fixing entrance transport guide members 13 protruding in a rib shape. Reference numeral 14 denotes a waste toner collecting section.

[0003]

Since the delivery / conveyance guide member as described above is provided in the minimum necessary number, it is fixed to the process cartridge by the delicate movement of the transfer paper while the transfer paper is being conveyed. There is a problem that a paper jam occurs between the apparatus and the apparatus.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the problems of the process cartridge as described above, and to prevent the occurrence of a paper jam between the process cartridge and the fixing device while the transfer paper is being conveyed. To provide cartridges.

[0005]

In order to achieve the above-mentioned object, the present invention provides an image carrier and at least one of charging, transferring, cleaning and discharging. In the process cartridge of the image forming apparatus, which has the above-mentioned means integrally in the housing of the process cartridge, and the housing is provided with a transfer paper delivery transport guide member, the delivery transport guide member and the housing of the fixing device. Is provided so as to face the transfer paper fixing inlet conveyance guide member provided in the above. According to a second aspect of the present invention, in the first aspect of the invention, the delivery conveyance guide member and the fixing entrance conveyance guide member are detachably fitted to each other.
The transfer paper delivery end of the delivery / transport guide member is arranged upstream of the transfer paper receiving portion of the fixing inlet transport guide member. The invention of claim 4 relates to claim 1
In the invention, the delivery conveyance guide member is formed so as to also serve as the entrance conveyance guide member.

[0006]

In the present invention as described above, in the invention of claim 1, in the process cartridge as described above, the feeding / conveying guide member and the fixing entrance conveying guide member for the transfer sheet provided in the housing of the fixing device. Since they are provided so as to face each other, the transfer sheet can be smoothly conveyed along these guide members even if there is a slight movement of the transfer sheet when the transfer sheet is conveyed. According to a second aspect of the present invention, in the first aspect of the present invention, since the delivery conveyance guide member and the fixing entrance conveyance guide member are detachably fitted to each other, there is a subtle movement in the transfer paper when the transfer paper is conveyed. Also, the transfer paper is smoothly conveyed along these guide members. According to a third aspect of the invention, in the first aspect of the invention, the transfer sheet delivery end of the delivery / conveyance guide member is arranged upstream of the transfer sheet receiving portion of the fixing inlet / conveyance guide member. When transferring paper, even if there is a slight movement in the transfer paper,
The transfer paper is smoothly conveyed along these guide members.
According to the invention of claim 4, in the invention of claim 1, since the delivery conveyance guide member is formed so as to also serve as the entrance conveyance guide member, the accuracy of alignment between the delivery conveyance guide member and the entrance of the fixing device is high, When the transfer sheet is conveyed, the behavior at the time of passing the transfer sheet is reduced to smoothly convey the transfer sheet.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The first, second, third and fourth embodiments of the present invention will be described below with reference to the accompanying FIGS. In these embodiments, the same parts as those of the conventional one are referred to by the same reference numerals, and the description thereof will be omitted. The different parts will be mainly described.

Since the first embodiment of the present invention shown in FIG. 1 and other embodiments other than this are common in many parts,
With respect to such a part, the same reference numerals as those in the first embodiment are cited, the description thereof is omitted, and different parts are mainly described.

In the first embodiment, the process cartridge 1 and the fixing device 2 are mounted on the localization value of the main body of the image forming apparatus by positioning pins (not shown) to minimize the ripple of the transfer paper on the housing 3 of the fixing device. A large number of fixing entrance transport guide members 13 are provided at the transfer paper entrance of the fixing device 2. A delivery / conveyance guide member 12 is provided at the transfer paper discharge port in the housing 3 of the process cartridge.
When the process cartridge 1 and the fixing device 2 are mounted on the main body of the image forming apparatus, the delivery conveyance guide member 12 and the delivery conveying guide member 12 face each other and are formed so that the transfer paper passage surfaces are flush with each other. .. When the transfer paper passes between the two members by such alignment, the behavior thereof becomes small and the transfer paper is smoothly conveyed.

In the second embodiment, the process transport cartridge 1 is provided with a recess in the delivery transport guide member 12 and the fixing inlet transport guide member 13 is provided with a protrusion so that the two fit together. When the fixing device 2 and the fixing device 2 are set in the main body of the image forming apparatus, the fixing device 2 and the fixing device 2 are fitted as shown in FIG. 4 to form one rib.

The third embodiment is a process cartridge 1
When the fixing device 2 and the fixing device 2 are mounted, the lowermost point A of the sending / transporting guide member 12 in the vertical positional relationship between the fixing / transporting guide member 13 and the sending / transporting guide member 12 is the fixing inlet transporting guide member. Both members are formed so as to be located between the uppermost point B and the lowermost point C of 13. In this way, the transfer paper delivery end of the delivery / transport guide member 12 is arranged on the upstream side of the transfer paper receiving portion of the fixing entrance transport guide member 13.

In the fourth embodiment, the delivery / transport guide member 12 of the process cartridge 1 also serves as the fixing inlet transport guide member 13. Due to the single conveyance guide member, when the process cartridge 1 and the fixing device 2 are mounted, the alignment accuracy of the conveyance guide member is high and the fixing device 2 does not have the fixing entrance conveyance guide member 13. You may.

[0013]

The present invention is as described above, and in the invention of claim 1, the image carrier and at least one means of at least one of charging, transfer, cleaning, and charge removal are used as the housing of the process cartridge. In a process cartridge of an image forming apparatus, which is integrally provided in the housing, and in which a transfer paper delivery / conveyance member is provided in the housing, the delivery / conveyance guide member and the transfer paper provided in the housing of the fixing device are provided. The fixing entrance conveying guide member is provided so as to face each other, and when the transfer paper is conveyed, even if there is a slight movement in the transfer paper, the transfer paper is smoothly conveyed along the guide members. Therefore, there is an effect that a paper jam does not occur. According to a second aspect of the present invention, in the first aspect of the present invention, the delivery conveyance guide member and the fixing entrance conveyance guide member are detachably fitted to each other, and the positions of the two can be surely aligned. Even if there is a subtle movement in the transfer paper between these members, the transfer paper is smoothly conveyed along the guide members, so that there is an effect that paper jam does not occur. According to a third aspect of the present invention, in the first aspect of the invention, the transfer paper delivery end of the delivery / transport guide member is arranged upstream of the transfer paper receiving portion of the fixing inlet / transport guide member. When the transfer paper is conveyed, even if there is a slight movement of the transfer paper between these members, the transfer paper can be smoothly conveyed along those members, and therefore, there is an effect that a paper jam does not occur. According to the invention of claim 4, in the invention of claim 1, since the delivery conveyance guide member is formed so as to also serve as the entrance conveyance guide member, the accuracy of alignment between the delivery conveyance guide member and the entrance of the fixing device is high, It is possible to reduce the behavior of the transfer paper between the delivery / conveyance guide member and the fixing device, prevent paper jams, and reduce the cost of the fixing device.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of a first embodiment of the present invention.

FIG. 2 is a top view showing a state in which the above process cartridge and the fixing device are mounted on the main body of the image forming apparatus.

FIG. 3 is a partial view showing a concave portion of a delivery / conveyance guide member and a convex portion of a fixing inlet conveyance guide member according to the second embodiment.

FIG. 4 is a view showing a state in which a concave portion of the delivery conveyance guide member and a convex portion of the fixing entrance conveyance guide member are fitted with each other.

FIG. 5 is a schematic vertical sectional view of a third embodiment of the above.

FIG. 6 is a schematic vertical sectional view of a fourth embodiment of the above.

[Explanation of symbols]

 1 Process Cartridge 2 Fixing Device 3 Process Cartridge Housing 4 Fixing Device Housing 12 Delivery Conveying Guide Member 13 Fixing Entrance Conveying Guide Member 16 Recess 17 Convex

Claims (4)

[Claims] 1. An image carrier and at least one means of at least one of charging, transfer, cleaning, and static elimination are integrally provided in a housing of a process cartridge, and a transfer paper feeding / conveying member for the transfer cartridge is provided in the housing. In the process cartridge of the image forming apparatus provided with, the delivery conveyance guide member and the fixing entrance conveyance guide member for the transfer sheet provided in the housing of the fixing device are provided so as to face each other. Process cartridge. 2. The process cartridge according to claim 1, wherein the delivery conveyance guide member and the fixing entrance conveyance guide member are detachably fitted to each other. 3. The transfer paper delivery end of the delivery / conveyance guide member,
2. The process cartridge according to claim 1, wherein the process cartridge is arranged on the upstream side of the transfer paper receiving portion of the fixing entrance conveyance guide member. 4. The process cartridge according to claim 1, wherein the delivery conveyance guide member is formed so as to also function as an entrance conveyance guide member.