JPH10214001A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely fix positional relation between a latent image device and a photoreceptor and to firmly join them by integrally fitting a holding member to which the latent image device is fitted and the photoreceptor by using a side plate. SOLUTION: One end side 21 of the latent image device 2 is fitted to a main body housing 1 through a positioning pin P and the other end side 22 thereof is fitted to the housing 1 and the integrated side plate 4 through the pin P. The shaft 3a of the photoreceptor 3 is fitted to the housing 1 and the plate 4 through a bearing B so that the photoreceptor 3 can be rotated. Since the latent image device 2 and the photoreceptor 3 are integrally fixed by the housing 1 and the plate 4, the positional relation between them is precisely fixed and an electrostatic latent image can be written at a precise position on the photoreceptor 3 from the latent image device 2. Besides, the plate 4 is fitted so as to be freely attached and detached.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus for writing an electrostatic latent image on a photosensitive member from a latent image device and recording the image on a predetermined medium.

[0002]

2. Description of the Related Art FIG. 16 is a schematic sectional view for explaining a conventional image forming apparatus. In this image forming apparatus, the photoconductor 3 is attached to the main housing 1 via a side plate 4 ′, and the latent image device 2 is attached to the main housing 1 via an arrangement member 2 a. I have.

[0003] The shaft 3a of the photoconductor 3 is inserted into a side plate 4 'via a bearing B, and makes the photoconductor 3 rotatable. The side plate 4 'is detachably attached to the main housing 1 via the positioning pin P1. The arrangement member 2a that supports the latent image device 2 is attached to the main body housing 1 by a positioning pin P2.

[0004]

However, such an image forming apparatus has the following problems. That is, in this image forming apparatus, since the latent image device is attached to the main body housing via the holding member and the photoconductor is mounted to the main body housing via the side plate, the distance between the latent image device and the photoconductor is reduced. The tolerances are accumulated among the latent image device, the main body case, the side plate, and the photoconductor (axis), and it is difficult to accurately position the manufacturing apparatus and the photoconductor. This causes so-called color misregistration particularly in a color image forming apparatus, making it difficult to obtain a good image.

For example, when the side plate is detached from the positioning pins and the photosensitive member is inserted and removed from the housing of the main body, the positional relationship between the latent image device and the photosensitive member is slightly changed depending on the mounting state, and the image quality is degraded. This is a cause of deterioration.

Further, since the latent image device and the photosensitive member are positioned via a large number of components as described above, a strong connection between the latent image device and the photosensitive member cannot be obtained.
There is a problem that the image quality is degraded due to the vibration transmitted to each other.

Japanese Patent Laid-Open Publication No. Sho 64-70774 discloses an image forming apparatus in which a plurality of optical systems are fixed to the same support member. It does not achieve positioning or strong fastening, and causes deterioration in image quality due to so-called color shift or vibration.

Japanese Patent Application Laid-Open No. 6-242643 discloses a configuration in which a latent image device and a photosensitive member shaft are positioned in a vertical split type image forming apparatus. This is not applicable to an image forming apparatus that pulls out the horizontal direction.

[0009]

SUMMARY OF THE INVENTION The present invention is an image forming apparatus made to solve such a problem. That is, the image forming apparatus of the present invention includes a latent image device that emits light based on image data, a photoconductor on which an electrostatic latent image is written by light emission from the latent image device, and one end of the latent image device and the photoconductor. The apparatus includes a main body housing to which one end is integrally mounted, and a side plate which is arranged substantially parallel to the main body housing and integrally mounts the other end of the latent image device and the other end of the photosensitive member.

In the apparatus in which the latent image device is attached to an arrangement member, one end of the arrangement member is attached to a main body housing, and the other end is attached to a side plate.

Further, the side plate is detachably attached to the other end of the latent image device and the other end of the photosensitive member, and the side plate is detachably attached to the other end of the arrangement member and the other end of the photosensitive member. Also attached to.

In the present invention, the positional relationship between the latent image device and the photosensitive member can be accurately fixed by integrally attaching the latent image device or the holding member for mounting the latent image device and the photosensitive member by the side plate. In addition, the latent image device and the photoconductor can be firmly fastened.

Further, by making the side plate detachable, the positional relationship between the latent image device and the photosensitive member is fixed when the side plate is mounted, and the photosensitive member is removed when the side plate is removed. It can be easily pulled out from the main body.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the image forming apparatus of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic sectional view (part 1) illustrating an image forming apparatus according to a first embodiment of the present invention, and FIG. 2 is a schematic sectional view (part 2) illustrating an image forming apparatus according to the first embodiment.

That is, the image forming apparatus according to the first embodiment includes a latent image device 2 that emits a laser beam or the like based on image data, and a photoconductor 3 on which an electrostatic latent image is written by the light emitted from the latent image device 2. A main body housing 1 to which one end 21 of the latent image device 2 and one end 31 of the shaft 3a of the photoconductor 3 are integrally mounted;
And an integral side plate 4 to which the other end 22 of the shaft 3a of the photosensitive member 3 is integrally attached.

In the first embodiment, one end 2 of the latent image device 2
1 is attached to the main body casing 1 via a positioning pin P, and the other end 22 of the latent image device 2 is attached to the main body casing 1 and the integrated side plate 4 via the positioning pin P. The shaft 3a of the photoreceptor 3 is attached to the main body housing 1 and the integral side plate 4 via a bearing B so that the photoreceptor 3 is rotatable.

As described above, since the latent image device 2 and the photosensitive member 3 are integrally fixed by the main body casing 1 and the integral side plate 4, the positional relationship between the latent image device 2 and the photosensitive member 3 is accurately fixed. Thus, the electrostatic latent image can be written from the latent image device 2 to an appropriate position on the photoconductor 3.

The integrated side plate 4 is detachably attached. That is, as shown in FIG. 2, the latent image device 2 is pulled out by pulling out the integrated side plate 4 in the direction of the arrow in the figure.
Can be removed from the positioning pin P and the shaft 3a of the photoconductor 3. When the integral side plate 4 is removed, the bearing B is disengaged from the shaft 3a of the photoconductor 3, and the photoconductor 3 is moved to the shaft 3a.
It can be easily removed from.

FIGS. 3A and 3B are schematic perspective views for explaining the first embodiment. FIG. 3A shows a state in which an integrated side plate is mounted, and FIG. 3B shows a state in which the integrated side plate is removed. FIG. 4 is a schematic cross-sectional view illustrating a mounted state of the integrated side plate, and FIG. 5 is a schematic cross-sectional view illustrating a removed state of the integrated side plate.

Actually, as shown in FIG. 4, the photosensitive member 3 is supported by a support member 3b, and the integral side plate 4 is removed from the latent image device 2 and the photosensitive member 3 to support the photosensitive member 3 as shown in FIG. The member 3b is pulled out together with the photoconductor 3. This makes it possible to shift from the mounted state shown in FIG. 3A to the pulled-out state shown in FIG. 3B.

That is, in the mounting state shown in FIG.
The integrated side plate 4 is inserted into the positioning pin P, and the positional relationship between the latent image device 2 and the photoconductor 3 is firmly fastened. On the other hand, in the detached state shown in FIG. 3B, by pulling out the integral side plate 4 from the positioning pin P, the latent image device 2 and the photosensitive member 3 are integrally pulled out. When the integrated side plate 4 is pulled out, it is held by the rail R and can be pulled out substantially horizontally from the main body casing 1 toward the user.

FIG. 6 is a schematic structural view of a color copying machine.
In this color copying machine, C (cyan), M (magenta) Y
(Yellow) and K (black) images are sequentially formed on paper, and trays T1 and T for storing paper of a predetermined size are provided.
2, T3, four latent image devices 2 and photoconductors 3 corresponding to respective colors, four integrated side plates 4 for integrally attaching these latent image devices 2 and photoconductor 3 to the main body housing 1, and paper And a fixing device 5 for fixing an image of each color formed on the fixing device.

FIG. 7 is an enlarged view of the image forming portion (latent image device and photosensitive member) in the color copying machine shown in FIG. That is, the latent image device 2 emits laser light and scans based on the image data. The laser light emitted from the latent image device 2 is reflected by the mirrors M1 to M3 and is irradiated on the photoreceptor 3. The photosensitive member 3 is a shaft 3a by a bearing B.
And an electrostatic latent image is formed based on the laser light applied to the surface.

The latent image device 2 and the photosensitive member 3 are integrated with the side plate 4.
Is fixed integrally, the positional relationship between the latent image device 2 and the photoconductor 3 is accurately determined.
The laser beam emitted from the mirror and reflected by the mirrors M1 to M3 is accurately irradiated on a predetermined position of the photoconductor 3.

Next, a second embodiment of the image forming apparatus of the present invention will be described.
An embodiment will be described. FIG. 8 is a schematic cross-sectional view illustrating a second embodiment (part 1), and FIG. 9 is a schematic cross-sectional view illustrating a second embodiment (part 2).

The image forming apparatus according to the second embodiment includes a latent image device 2 attached to an arrangement member 2a and a photosensitive member 3
And one end 21a of the arrangement member 2a and the shaft 3 of the photoreceptor 3.
The main body 1 has an end 31a of the main body 1a and an integrated side plate 4 to which the other end 22a of the arrangement member 2a and the other end 32 of the shaft 3a of the photosensitive member 3 are integrally mounted.

The latent image device 2 is fixed on an upper portion of the arrangement member 2a, and the arrangement member 2a is
The positional relationship between the photoconductor 3 and the photoconductor 3 is accurately set in a state where the photoconductor 3 is disposed between the photoconductors 3. Also, the shaft 3 of the photoconductor 3
“a” is attached to the main body housing 1 and the integral side plate 4 via a bearing B, and makes the photoconductor 3 rotatable.

As described above, even if the latent image device 2 is of the type in which the latent image device 2 is attached to the
a and the photosensitive member 3 are integrally fixed by the main body housing 1 and the integral side plate 4, whereby the positional relationship between the latent image device 2 and the photosensitive member 3 can be accurately fixed. An electrostatic latent image can be written at an accurate position on the body 3.

The integral side plate 4 is detachably attached. That is, as shown in FIG. 9, by pulling out the integral side plate 4 in the direction of the arrow in FIG.
a and can be removed from the shaft 3a of the photosensitive member 3. By removing the integral side plate 4, the bearing B is disengaged from the shaft 3a of the photoconductor 3, and the photoconductor 3 is
a can be easily removed.

In the second embodiment, similarly to the first embodiment shown in FIG. 4, a support member 3b for supporting the photoreceptor 3 is attached, and the support member is pulled out by removing the integral side plate 4. The photosensitive member 3 can be pulled out together with 3b.

Next, a third embodiment of the image forming apparatus of the present invention will be described.
An embodiment will be described. FIG. 10 is a schematic sectional view (part 1) for explaining the third embodiment, and FIG. 11 is a schematic sectional view (part 2) for explaining the third embodiment.

The image forming apparatus according to the third embodiment includes an angle 2c on which the latent image device 2 is mounted, a photosensitive member 3, one of the angles 2c and one end 3 of a shaft 3a of the photosensitive member 3.
The main body 1 has an integral side plate 4 to which the other end of the angle 2c and the other end 32 of the shaft 3a of the photoreceptor 3 are integrally attached.

The latent image device 2 is placed in a state where the positioning pins P 'are inserted into two substantially L-shaped angles 2c. The two angles 2c are fixed to the main body housing 1, respectively.

The integral side plate 4 is inserted into a positioning pin P provided on the angle 2c, and the shaft 3a of the photosensitive member 3
Through the bearing B. Thus, the positional relationship between the latent image device 2 and the photoconductor 3 can be accurately fixed.

The integrated side plate 4 is detachably mounted. That is, as shown in FIG. 11, the integral side plate 4 can be removed from the positioning pin P of the angle 2c and the shaft 3a of the photoconductor 3 by pulling out the integrated side plate 4 in the direction of the arrow in the figure. By removing the integral side plate 4, the bearing B is removed from the shaft 3a of the photoconductor 3, and the photoconductor 3 can be easily removed from the shaft 3a.

In the third embodiment, similarly to the first embodiment shown in FIG. 4, a support member 3b for supporting the photosensitive member 3 is attached, and the support member pulled out by removing the integral side plate 4 is provided. The photosensitive member 3 can be pulled out together with 3b.

Next, the fourth embodiment of the image forming apparatus of the present invention will be described.
An embodiment will be described. FIG. 12 is a schematic sectional view (part 1) for explaining the third embodiment, and FIG. 13 is a schematic sectional view (part 2) for explaining the third embodiment.

The image forming apparatus according to the fourth embodiment includes a latent image device 2, a photosensitive member 3, and one end 21 of the latent image device 2.
And a main body housing 1 to which the one end 31 of the shaft 3a of the photoconductor 3 is integrally mounted, and an integrated side plate to which the other end 22 of the latent image device 2 and the other end 32 of the shaft 3a of the photoconductor 3 are integrally mounted. 4 is provided. In particular, the fourth embodiment is characterized in that the integral side plate 4 is directly attached to the other end 22 of the latent image device 2 via the positioning pin P.

The integral side plate 4 is inserted into a positioning pin P provided on the other end 22 of the latent image device 2 and is inserted into a shaft 3a of the photoconductor 3 via a bearing B. Thus, the positional relationship between the latent image device 2 and the photoconductor 3 can be accurately fixed.

The integrated side plate 4 is detachably attached. That is, as shown in FIG.
Can be removed from the positioning pin P and the shaft 3a of the photoreceptor 3 by pulling it out in the direction of the arrow in the figure.
By removing the integral side plate 4, the bearing B is removed from the shaft 3a of the photoconductor 3, and the photoconductor 3 can be easily removed from the shaft 3a. Further, by removing the integral side plate 4, the latent image device 2 can be easily removed.

Next, the fifth embodiment of the image forming apparatus of the present invention will be described.
An embodiment will be described. FIG. 14 is a schematic sectional view (part 1) for explaining the fifth embodiment, and FIG. 15 is a schematic sectional view (part 2) for explaining the fifth embodiment.

The image forming apparatus according to the second embodiment includes a latent image device 2 attached to an arrangement member 2a and a photosensitive member 3
And one end 21a of the arrangement member 2a and the shaft 3 of the photoreceptor 3.
The main body 1 has an end 31a of the main body 1a and an integrated side plate 4 to which the other end 22a of the arrangement member 2a and the other end 32 of the shaft 3a of the photosensitive member 3 are integrally mounted. In particular, in the fifth embodiment, the other end 22 of the arrangement member 2a
1A is characterized in that the integrated side plate 4 is directly attached via the positioning pin P.

The latent image device 2 is fixed to the upper part of the arrangement member 2a.
The positional relationship between the photoconductor 3 and the photoconductor 3 is accurately set in a state where the photoconductor 3 is disposed between the photoconductors 3. Also, the shaft 3 of the photoconductor 3
“a” is attached to the main body housing 1 and the integral side plate 4 via a bearing B, and makes the photoconductor 3 rotatable.

As described above, even if the latent image device 2 is of the type attached to the arrangement member 2a,
a and the photosensitive member 3 are integrally fixed by the main body housing 1 and the integral side plate 4, whereby the positional relationship between the latent image device 2 and the photosensitive member 3 can be accurately fixed. An electrostatic latent image can be written at an accurate position on the body 3.

The integral side plate 4 is detachably attached. That is, as shown in FIG. 15, the integral side plate 4 can be removed from the shaft 3a of the photoconductor 3 by pulling out the integral side plate 4 in the direction of the arrow in the figure. By removing the integral side plate 4, the positioning pin P on the one end 21 a of the arrangement member 2 a comes off the main body housing 1. Further, the bearing B is disengaged from the shaft 3a of the photoconductor 3, and the photoconductor 3 can be easily removed from the shaft 3a. Further, the latent image device 2 can be easily removed together with the integrated side plate 4.

[0046]

As described above, the image forming apparatus of the present invention has the following effects. That is, it is possible to accurately position the latent image device and the photoconductor, and it is possible to form an image with good image quality. Further, the side plate can firmly fasten the latent image device and the photoconductor, and the transfer function of the vibration between the latent image device and the photoconductor can be improved and a good image can be obtained.

Further, by removing the side plate, the photosensitive member and the latent image device can be easily taken out of the main body, so that the maintainability can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view (part 1) illustrating a first embodiment.

FIG. 2 is a schematic sectional view (part 2) for explaining the first embodiment;

FIG. 3 is a schematic perspective view illustrating the first embodiment.

FIG. 4 is a schematic cross-sectional view illustrating a mounted state of a side plate.

FIG. 5 is a schematic sectional view illustrating a state where a side plate is removed.

FIG. 6 is a schematic configuration diagram of a color copying machine.

FIG. 7 is an enlarged configuration diagram of an image forming portion.

FIG. 8 is a schematic cross-sectional view (part 1) illustrating a second embodiment.

FIG. 9 is a schematic cross-sectional view (part 2) illustrating a second embodiment.

FIG. 10 is a schematic cross-sectional view (part 1) illustrating a third embodiment.

FIG. 11 is a schematic sectional view (part 2) illustrating a third embodiment.

FIG. 12 is a schematic sectional view (part 1) for explaining a fourth embodiment;

FIG. 13 is a schematic sectional view (part 2) for explaining the fourth embodiment;

FIG. 14 is a schematic sectional view (part 1) for explaining a fifth embodiment;

FIG. 15 is a schematic sectional view (part 2) for explaining the fifth embodiment;

FIG. 16 is a schematic cross-sectional view illustrating a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body housing 2 Latent image device 2a Arrangement member 3 Photoconductor 3a Shaft 4 Integrated side plate B Bearing

Claims (4)

[Claims] A latent image device that emits light based on image data; a photosensitive member on which an electrostatic latent image is written by light emission from the latent image device; one end of the latent image device and one end of the photosensitive member And a side plate that is disposed substantially parallel to the main body casing, and that integrally mounts the other end of the latent image device and the other end of the photoconductor. An image forming apparatus. A latent image device that emits light based on image data; an arrangement member to which the latent image device is attached; a photoconductor on which an electrostatic latent image is written by light emission from the latent image device; A main body housing to which one end side and one end side of the photoconductor are integrally mounted; and a main body housing arranged substantially parallel to the main body housing, wherein the other end of the arrangement member and the other end of the photoconductor are integrally formed. An image forming apparatus, comprising: a side plate attached to the image forming apparatus. 3. The image forming apparatus according to claim 1, wherein the side plate is detachably attached to the other end of the latent image device and the other end of the photoconductor. 4. The image forming apparatus according to claim 2, wherein the side plate is detachably attached to the other end of the arrangement member and the other end of the photoconductor.