JPH10213952A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately position a photoreceptor and a latent image device by forming a supporting member for supporting the shaft of the photoreceptor and an arranging member for attaching the latent image device into one body. SOLUTION: The device is provided with the latent image device 2 for writing an electrostatic latent image on the photoreceptor 1 by emitting light based on image data, and the supporting member 3a for supporting the shaft 1a of the photoreceptor 1 and the arranging member 3b for attaching the latent image device 2 are formed into one body as a frame 3. The frame 3 for supporting both of the photoreceptor 1 and the latent image device 2 is attached to a main body housing A through a holding member 4. The holding member 4 is positioned to the main body housing A through a positioning pin P1, and the installation position of each photoreceptor 1 and the latent image device 2 is decided by the holding member 4 through the frame 3. Thus, a common difference of a distance between the latent image device 2 and the photoreceptor is as long as the distance between the supporting member 3a and the shaft 1a, then, accurate positioning is accomplished.

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. 5 is a schematic sectional view for explaining a conventional image forming apparatus. In this image forming apparatus, the photoconductor 1 is attached to the main body housing A via the side plate 5, and the latent image device 2 is mounted to the main housing A via the support 6.

[0003] The shaft 1a of the photosensitive member 1 is inserted into the side plate 5 via a bearing B, so that the photosensitive member 1 is rotatable. The side plate 5 is detachably attached to the main body housing A via the positioning pin P3. Further, the support 6 supporting the latent image device 2 is attached to the main body housing A by the positioning pin P4.

[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 support, and the photoconductor is attached 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. by this,
Particularly in a color image forming apparatus, so-called color misregistration occurs, and it is 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 present invention provides an image forming apparatus including a latent image device that writes an electrostatic latent image on a photoconductor by light emission based on image data, and a support member that supports a shaft of the photoconductor, and an arrangement for mounting the latent image device. It is formed integrally with the member.

The image forming apparatus further includes a holding member for holding the photosensitive member supported by the supporting member and the latent image device attached to the disposing member collectively to the main body housing and detachably holding the same. This holding member is also an image forming apparatus attached to the main body housing via an elastic member.

In the present invention, since the support member for supporting the shaft of the photoreceptor and the arrangement member for mounting the latent image device are integrally formed, a plurality of members are provided between the photoreceptor and the latent image device. , And these positional relationships can be kept strong.

Further, the photosensitive member and the latent image device are attached to the main body housing collectively, and a holding member which detachably holds the photosensitive member and the latent image device holds the photosensitive member and the latent image device while maintaining the positional relationship between the photosensitive member and the latent image device. It can be inserted and removed from the housing.
Furthermore, by attaching the holding member to the main body housing via the elastic member, the vibration from the main body housing side can be absorbed by the elastic member and can be prevented from being transmitted to the photoconductor and the latent image device.

[0013]

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 illustrating a first embodiment of the image forming apparatus of the present invention. That is, the image forming apparatus according to the first embodiment emits light based on the image data,
A latent image device 2 for writing an electrostatic latent image thereon is provided. In the present embodiment, in particular, a support member 3a for supporting the shaft 1a of the photoreceptor 1 and an arrangement member 3b for mounting the latent image device 2
Are configured as an integrated frame 3.

One end of the shaft 1a of the photoreceptor 1 is connected to one side of a support member 3 which is a substantially vertical plate-like body of the frame 3.
a through a bearing B, the other end of which is a substantially vertical plate-like body of the frame 3 on the other side of the support member 3a
And is inserted into the main body housing A via the bearing B.

The latent image device 2 is mounted on an arrangement member 3b which is a substantially horizontal plate-like body in the frame 3.

A frame 3 supporting both the photoreceptor 1 and the latent image device 2 has a main body housing A via a holding member 4.
Attached to. The holding member 4 is a positioning pin P1
The frame 3 is positioned by the
The arrangement positions of the photoconductor 1 and the latent image device 2 are determined via the.

As described above, since the latent image device 2 and the photosensitive member 1 are supported by the integral frame 3, the tolerance of the distance between the latent image device 2 and the photosensitive member 1 is limited by the support member 3a, the shaft 1a and , And high-precision positioning can be performed.

Further, since the latent image device 2 and the photosensitive member 1 are firmly fastened by the integral frame 3, even if vibration is transmitted to the latent image device 2 and the photosensitive member 1, The transfer function in the vibration with the body 1 will be improved.

FIGS. 2A and 2B are schematic perspective views showing the mounted state and the removed state of the frame 3 on which the photosensitive member 1 and the latent image device 2 are mounted. FIG. 2A shows the mounted state, and FIG. .

As shown in FIG. 2A, for example, C (cyan), M (magenta), Y
When four latent image devices 2 such as (yellow) and K (black) are arranged, each of the latent image devices 2 is attached to the arrangement member 3 b of each frame 3, and each frame 3 is connected to the main body via the holding member 4. It is in a state of being attached to the housing A. Each holding member 4
Are positioned on the main body housing A by the positioning pins P1 and P2.

Each frame 3 is slidable by rails R provided along the horizontal direction. As shown in FIG.
From the positioning pins P1 and P2 so that the holding member 4 is supported by the rail R.

When the frame 3 is pulled out of the main housing A,
The holding member 4 comes off the positioning pins P1 and P2 of the main body housing A, and the bearing B comes off the shaft 1a. In this state, the frame 3 is supported by the rail R and can be pulled out in a substantially horizontal direction.
By pulling out the frame 3, the photoconductor 1 and the latent image device 2 attached to the frame 3 can be removed together with the main body housing A.

FIG. 3 is a schematic sectional view for explaining the state of removing the frame in the order of (a) and (b). First, as shown in FIG. 3A, by pulling out the holding member 4 in the left direction in the figure (see the two-dot chain arrow), the holding member 4 is disengaged from the positioning pins P1 of the main body housing A and the frame 3 B attached to the support member 3a
Comes off the shaft 1a.

Next, as shown in FIG. 3 (b), the frame 3 is further pulled out to move substantially horizontally along the rail R shown in FIG. The imaging device 2 is removed, and the photoconductor 1 is removed from the shaft 1a.

As described above, the photosensitive member 1 and the latent image device 2 are simultaneously pulled out only by pulling out the frame 3, so that an image reading unit (not shown) disposed above the latent image device 2 in the main body housing A. ), The maintenance of the latent image device 2 and the photoreceptor 1 can be easily performed.

Next, a second embodiment of the image forming apparatus of the present invention will be described.
An embodiment will be described. FIG. 4 illustrates a second example of the image forming apparatus.
It is a schematic sectional view explaining an embodiment. That is, this image forming apparatus differs from the first embodiment in that a support member 3a for supporting the shaft 1a of the photoconductor 1 and an arrangement member 3b for mounting the latent image device 2 are formed as an integral frame 3. Although they are common, they differ in that a holding member 4 for holding the frame 3 in the main body housing A is attached to the main body housing A via an elastic member D.

That is, the holding member 4 for holding the frame 3
Is positioned on the main body housing A by the positioning pin P1, but the elastic member D is sandwiched between the holding member 4 and the main body housing A in a state of being inserted into the positioning pin P1. .

As the elastic member D, for example, a rubber-like or resin-like material is used. Since the elastic member D is provided between the main body housing A and the holding member 4, the vibration transmitted from the main body housing A is absorbed by the elastic member D, and the light is exposed from the holding member 4 via the frame 3. The transmission to the body 1 and the latent image device 2 can be prevented.

As in the first embodiment, the frame 3 can be pulled out of the main body housing A by removing the holding member 4 from the positioning pins P1 of the main housing A and pulling it out. . Thus, the photoconductor 1 and the latent image device 2 can be taken out together with the frame 3.

[0030]

As described above, the image forming apparatus of the present invention has the following effects. That is, in the present invention, since the supporting member for supporting the shaft of the photoreceptor and the disposing member for attaching the latent image device are formed integrally, it is possible to keep these positional relationships firm. Thus, the photosensitive member and the latent image device can be accurately positioned.

Further, the transfer function in vibration between the photosensitive member and the latent image device can be improved, and a good image quality can be obtained. Further, the photoconductor and the latent image device can be simultaneously pulled out, so that the maintainability can be improved.

Further, by attaching the holding member and the main body housing via the elastic member, the vibration from the main body housing side can be absorbed by the elastic member, and the mutual vibration between the photosensitive member and the latent image device can be suppressed, so that it is preferable. High image quality can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view illustrating an image forming apparatus according to a first embodiment.

FIG. 2 is a schematic perspective view showing a mounted state and a detached state.

FIG. 3 is a schematic sectional view illustrating a state of removal.

FIG. 4 is a schematic sectional view illustrating an image forming apparatus according to a second embodiment.

FIG. 5 is a schematic sectional view illustrating a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Photoreceptor 2 Latent image device 3 Frame 3a Support member 3b Arrangement member 4 Holding member A Main body housing B Bearing D Elastic member

Claims (3)

[Claims] 1. An image forming apparatus comprising a latent image device for writing an electrostatic latent image on a photoconductor by light emission based on image data, wherein a support member for supporting a shaft of the photoconductor and the latent image device are mounted. An image forming apparatus, wherein an arrangement member is integrally formed. 2. A holding member for holding the photoreceptor supported by the support member and the latent image device attached to the arranging member collectively to a main body housing and detachably holding the same. 2. The device according to claim 1, wherein
The image forming apparatus as described in the above. 3. The image forming apparatus according to claim 2, wherein the holding member is attached to the main body via an elastic member.