JPS6333770A - Supporting device for electric charge removing means of image forming device - Google Patents

Abstract

PURPOSE:To safely attach and detach an image carrier by providing an electric charge removing means so that is can be turned with a shaft, which is parallel with the revolving shaft of the image carrier, as the supporting shaft. CONSTITUTION:A LED array 12 functioning as the electric charge removing means is provided on independent supporting members 17 and 18 so that it can be freely turned with a shaft 14 as the fulcrum, and the LED array 12 can be easily turned by a lever 19 fixed to the end part of the LED array 12. A photosensitive drum 1 is so constituted that it cannot be detected if the LED array 12 is close to the photosensitive drum 1. When a lever 19 is turned counterclockwise, the LED array 12 is turned with the shaft 14 as the fulcrum, and a sufficient gap is formed between the LED array 12 and the photosensitive drum 1, and the photosensitive drum 1 is easily drawn out along a shaft 2 because detachment of the photosensitive drum 1 is not hindered by the level 19. Thus, the electric charge removing means and the image carrier are easily separated from each other by a sufficient gap with simple constitution, and the image carrier is safely attached and detached.

Description

[Detailed description of the invention]

(A) Field of Industrial Application This invention relates to a charge erasing means support device for a forming apparatus in which an image carrier is removably attached. (B) Conventional Technology Some image forming apparatuses such as copying machines are equipped with a charge erasing means for erasing charges in an unnecessary image area on an image bearing member such as a photosensitive drum. This unnecessary image area refers to the unexposed area that occurs at the edge of the photoreceptor drum when variable-reduction copying is performed, and the area specified when copying involves image editing such as masking or cropping. This may be an unnecessary area. In particular, in recent years, light emitting diode (IICD) arrays have been widely used as charge erasing means, making it possible to erase unnecessary images with high resolution. However, since this LICD array has a small amount of light emitted, it is difficult to erase the charge.

[In order to secure the necessary amount of light, it is necessary to place it close to an image carrier such as a photoreceptor drum. However, especially when editing images, the LED array should be placed close to the photoreceptor drum at an angle of about 1 to 2 meters and 8 degrees, in order to make the boundary between the necessary image area and unnecessary image area clearer. It is necessary to set Therefore, when the photoreceptor drum is attached or removed, there is a problem in that the photoreceptor drum comes into contact with the LED array, its supporting member, etc., and is easily damaged. To solve this problem, Japanese Patent Application Laid-Open No. 60-32080 discloses a method of separating the photosensitive drum and the LED play. (c) Problems to be solved by the invention Monoke shown in Japanese Patent Application Laid-Open No. 60-32080,
Simply put, there is a shift mechanism support fixed to the main body of the image forming apparatus, a sliding means disposed on the shift mechanism support that slides in a predetermined direction, and a sliding mechanism interlocked with the sliding of the sliding means. This system consists of a charge erasing means that shifts away from the image carrier, but its mechanical configuration is extremely complicated. It is difficult to make it large. In addition, if such an image forming apparatus is used for a long time, II
! :The light emitting surface of the D array becomes dirty due to toner adhesion, etc. It is necessary to periodically clean the light emitting surface, but the above-mentioned publication does not give any consideration to such matters. Therefore, the main object of the present invention is to provide a charge erasing means support device for an image forming apparatus configured to solve the above-mentioned problems with a simple structure. Ninth Means To put it simply, the present invention provides a nine-image system comprising a removable image carrier and a charge erasing means disposed close to the image carrier to erase unnecessary charges on the image carrier. In the forming device,
The charge erasing means is installed so as to be rotatable about an axis parallel to the rotation axis of the image carrier. (e) Since the active charge erasing means is rotatable as mentioned above,
This rotational movement allows the charge erasing means and the image carrier to be easily separated from each other by a sufficient distance, so that the image carrier can be safely attached and detached. (F) Embodiment FIG. 1 shows the overall configuration of an electronic copying machine using an embodiment of the present invention. Details such as an explanation of the operation of the electronic copying machine will be omitted here, and only the configuration π around the photosensitive drum, which is an image carrier, will be briefly explained. fil is a photoreceptor drum, and its center is the axis (2), as shown by the arrow (
A) It rotates in the direction. The surrounding area of the photoconductor drum fi+ includes a charging corotron f3), a light source (4), and a short focus lens array (5), and the electrostatic latent image of the document placed on the document table (6) is transferred to the photoconductor. It is formed on the circumferential surface of the drum m. Thereafter, a toner image corresponding to the electrostatic latent image is formed on the photoreceptor drum by the developing device N (7), and the toner image is transferred to a transfer paper (not shown) by the transfer corotron (8). Furthermore, after that, the toner remaining on the circumferential surface of the photoconductor drum is scraped off by the cleaning blade flO1 provided in the cleaning unit (9), the static elimination LICD array (11) is turned on, and the toner remaining on the circumferential surface of the photoconductor drum is scraped off. Eliminates residual charge. a Smell is a charge erasing means Lll! This is a D array, which is constructed by, for example, arranging I and KD chip rows of @4 degrees continuously in the longitudinal direction of the photoreceptor drum (1). For example, among the electrostatic latent images formed on the photoreceptor drum (1),
If it is desired to erase only a certain specified area, it is sufficient to synchronize with the rotational speed of the photosensitive drum 11) and turn on the LED chip corresponding to the position of the specified area. At this time, L1! X
The distance between the D chip (11) and the photoreceptor drum (]) is 1 to 2.
It is necessary to place it as close as a cabinet. Also, L1! ! The D array α-bo can be rotated using the axis 0 ship as a fulcrum,
This will be explained in detail later. The photoreceptor drum fi+ is removable along its rotation axis (2), and the charging corotron (3), developing device (7), and cleaning unit (9) can also be installed in an appropriate manner. It is configured so that it can be attached and detached. In a copying machine configured as shown below,
The present invention will be explained. Filling 21 yen! is a configuration diagram of only the main parts around the photoreceptor drum il+ in the first cabinet, Figure 2 (a) is a front view from the axial direction of the photoreceptor drum (1), and Figure 2 (F5) is a front view of the photoreceptor drum (1). It is a flat garden. However, all of the front sills in Figures 2 to 6 below are drawn with the side walls omitted. Second
Unlike the Chiku 1 diagram, the cabinet is not a cross-sectional view, so the shapes are slightly different, but (1) is the photoreceptor drum, (7) is the developing unit Kl, f91 is the cleaning unit, and (4) is the light source. , the supporting member 000 of the light source (4) includes a charging corotron (3), a short focus lens array (6), and an LED.
Array α force is installed. The LBD array 021 is
Another support member 07 fixed to support member αFAQeK
) Ol Ic is rotatably installed around the axis α as a fulcrum, and can be easily rotated by Sakaki to a lever fixed to the end of the LIICD array a1J. (b) 翰】) is the side wall of the copying machine body. The figure shows the case where the LED array (121) is in the normal use position, and it can be seen that in this state, the lever 1 prevents the photoreceptor drum m from detaching along the axis (2).
In other words, when the LED array α2 is close to the photoreceptor drum fi+, the photoreceptor drum fil cannot be removed. Note that in normal use, a bearing member for holding the shaft fi+ of the photosensitive drum is installed on the side wall (a) as described later, but it is not shown here. Now, in this state, if the photosensitive drum frl is to be removed, the lever is rotated counterclockwise as shown in FIG. 3. From this, the LED array α is rotated using the fulcrum as a fulcrum, and between it and the photoreceptor drum i1+,
Sufficient spacing is formed. In this state, as is clear from the figure, the photoreceptor drum +11 is not prevented from leaving by the lever stem, so the photoreceptor drum f1) can be easily pulled out along the shaft (2). In addition, in order to remove the photoreceptor drum [11] more safely, as shown in FIG. ) is desirable. Next, a case will be described in which the photoreceptor drum is mounted again after removing the photoreceptor drum +1+. Figure 5 shows the state after the photoconductor drum is installed, and as shown, the cleaning unit (9), charging corotron (3), developing device (7), etc. are essential elements for image formation. Therefore, it is considered that these attachments are done relatively reliably without being forgotten.
When the LFX'D array (1 crane) in this invention is simply rotated, it is easy to forget to return it to its original state.
) to prevent forgetting to return the LED array (1z) to its original position. The shaft (2) of the photoreceptor drum is positioned by inserting the shaft (2) into the hole (2).
4) Align the screws (261 (capital)) with the screw holes (not shown) provided on the side wall (a), and tighten the screws (261 (capital)) as shown in Figure 6.
It is configured to be fixed to the side wall mount. However, in Figure 5flL) and 61''4 (&>,
The side wall (a) is not shown. Now, as shown in Fig. 5, if you try to install the bearing member □ with the LED array (one part rotated counterclockwise to a point f away from the photoreceptor drum (1), 5 As shown in Figure (b), press lever n.
1 does not engage with the recess formed in the bearing mounting part, and therefore the bearing member (22) cannot be installed.In other words, when trying to set the bearing member 22 in the correct position, the end of the lever The component and the bottom part ('?A) of the holding member come into contact with each other. On the other hand, as shown in FIG. When installed, the lever ellipse engages with the recess (c) K formed in the bearing member, so the bearing member is installed in the proper position on the side wall and fixed with the screws □□□. Next, another effect of the present invention will be explained.Generally, since an image forming apparatus that performs dry printing is used for a long time, it is inevitable that the optical system etc. will become dirty due to adhesion of toner powder.In particular, If an LED array for charge erasing is arranged near the developing device as in the embodiment of the present invention, toner will inevitably adhere to its light emitting surface, and depending on the degree, it will have a negative effect on the charge erasing effect. In case 6, first move the document table (6) in the direction of arrow (B), then open the inner lid (■) in the direction of arrow (C), and then move the developing device (not shown) in the direction of arrow (D). ) direction. The dashed-dotted line in the figure indicates the upper level l where the developing device is installed, and in this state, a wide space is formed at this position. By removing the bearing member and rotating a lever (not shown), the LED array! 121 is rotated counterclockwise about the shaft α as a fulcrum, separating it from the photosensitive drum m as shown in the figure, and at the same time turning the light emitting surface. It is formed by taking out the developing device and approaches it toward the middle.Then, insert your hand into the main body of the copying device as shown by the arrow (G).
The light emitting surface can be cleaned with a suitable cloth. Although the embodiments of the present invention have been described above, the charge erasing means may be a device for erasing unnecessary areas during variable-magnification copying, or may be a normal charge erasing lamp. Of course. (G) Detailed explanation of the invention As mentioned above, according to the present invention, the charge erasing means and the image bearing member can be easily and safely separated from each other by a sufficient distance with a simple structure. 7 is created by attaching and detaching the image carrier.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an example of a copying machine as an embodiment of the present invention. Figure 2 is a block diagram of a charge erasing means according to an embodiment of the present invention. FIGS. 3 and 4 are explanatory diagrams of the operation of the charge erasing means according to the embodiment of the present invention. Figure 5 (IEI) is an explanatory diagram showing another effect of the embodiment of the present invention. FIG. 7 is an explanatory diagram showing still another effect of the embodiment of the present invention. In the figure, (1) is the photosensitive drum, (+21 is r for charge erasing, EiD array, (14 LED array rotation shaft, It) is the LID array rotation lever, and (2) is the bearing member. Representative Patent Attorney Takuji Nishino (1 other person) Figure 8 Figure 4

Claims (1)

[Scope of Claims] 1. An image forming apparatus comprising a removable image carrier and a charge erasing means disposed close to the image carrier and erasing unnecessary charges on the image carrier. A charge erasing means support device for an image forming apparatus, wherein the charge erasing means is installed so as to be rotatable about an axis parallel to the rotation axis of the image carrier. 2. The image carrier is removable in the direction of its rotation axis;
Further, the charge erasing means is configured to be rotatable by operating a lever provided at an end thereof, and when the charge erasing means is at least closest to the image carrier, the charge erasing means 2. The charge erasing means support device for an image forming apparatus according to claim 1, wherein a lever prevents the image carrier from being removed from the main body of the image forming apparatus. 3. The charge erasing means is configured to be rotatable by operating a lever provided at an end thereof, and when the charge erasing means is at least in the farthest state with respect to the image carrier, the charge erasing means 2. The charge erasing means support device for an image forming apparatus according to claim 1, wherein a lever prevents attachment of a bearing member for a rotating shaft of the image carrier. 4. The charge erasing means is disposed between the latent image forming exposure means and the developing means which is detachably attached to the main body of the image forming apparatus, and the charge erasing means is disposed on the side of the space formed when the developing means is detached. 2. A charge erasing means support device for an image forming apparatus according to claim 1, wherein the charge erasing means support device of an image forming apparatus is rotatable.