JPS62166370A - Electrostatic recording device - Google Patents

Abstract

PURPOSE:To manufacture an electrostatic recording device at low cost with high productivity by making the constitution of the electrostatic recording which mounts a photosensitive body of different kind almost common except the photosensitive body. CONSTITUTION:A CPU read data on the mounted photosensitive body 1 out of a memory stored with data on the discharge condition of corona dischargers 2 suitable to various photosensitive bodies to be mounted, the light emission condition of an image exposure lamp 4, etc. Then, a high voltage generation 14 is controlled through a digital-analog converter D/A 1 based on the data to control the discharging voltage or current of the corona discharger 2 to a specific value. Further, the light emitting circuit which includes a photocoupler 15, a triac 16, a diode AC switch 17, etc., is controlled through a digital-analog converter D/A 2 to control the quantity of light emission of the image exposure lamp 5 to a specific value. The discharge condition of the corona discharger 2, the light emission condition of the image exposure lamp 5, etc., which are set by the CPU based on the data from the memory are reference condition for reproducing original image density, etc., faithfully, and the reference condition is altered when the image density, etc., are varied by preference.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to improvements in electrostatic recording devices, including the use of a heterogeneous photoreceptor, such as an amorphous silicon in the photoconductive layer.

Different materials such as Se-Te and Se-As + OPO have been used9, but even if the photoconductive layer is made of the same photoconductor material, there may be differences in layer thickness, resulting in poor photoconductor characteristics. Photoreceptors with different differences can be replaced and installed, and the control device can control any one or more of the discharge voltage or current for charging and static elimination, the light amount for image exposure and uniform exposure, and the voltage for developing bias. The present invention relates to an electrostatic recording device that can set standard conditions appropriate to the type of photoreceptor mounted on the device.

[Background of the invention]

Conventional electrostatic recording devices are equipped with a specific type of photoreceptor, and can be controlled by correcting conditions such as charging, N light, and developing bias in response to changes in photoreceptor temperature, fatigue, etc. However, even if a specific type of photoreceptor is used, if a photoreceptor with different characteristics is installed, for example due to differences in the layer thickness of the photoconductive layer between production lots, charging and It is not possible to properly correct conditions such as exposure and development bias. However, if the type of photoreceptor changes, such as one using amorphous silicon for the photoconductive layer for high-temperature regions, one using Se-based material for other regions, or one using OPC, It was impossible to correct this.

If the conditions such as charging, exposure, and developing bias can be appropriately corrected even if the type of photoreceptor changes as described above, the electrostatic recording device can be equipped with a different type of photoreceptor by replacing it. Since most of the configurations except the photoreceptor are common, the productivity of the electrostatic recording device is significantly increased, and manufacturing costs can be significantly reduced. However, even then, when replacing a different type of photoreceptor, there is the hassle of having to individually adjust the discharge voltage and current for charging and static elimination, the image exposure and uniform exposure views, the developing bias voltage, etc. be.

[Purpose of the invention]

The present invention provides electrostatic recording that can be installed by replacing photoconductors of different types, can be manufactured at high production costs at low cost, and does not require individual adjustments due to the replacement of photoconductors of different types. It provides equipment.

[Structure of the invention]

In the present invention, different types of photoreceptors can be replaced and installed,
Appropriate reference conditions can be set for the type of photoreceptor to be mounted by controlling one or more of the discharge voltage or current for charging and static elimination, the light amount for image exposure and uniform exposure, and the voltage for developing bias using a control device. The electrostatic recording device is characterized in that the control device performs the control by reading data from a storage device that stores data for setting the reference conditions.

〔Example〕

Hereinafter, the present invention will be described by way of examples with reference to the drawings.

FIG. 1 is a schematic configuration diagram showing an example of the electrostatic recording device of the present invention;
FIG. 2 is a circuit diagram for controlling the discharge voltage or current of the corona discharger and the light amount of the image exposure lamp, and FIGS. 3 to 5 are graphs showing examples of changes in photoreceptor characteristics depending on the type of photoreceptor.

In Fig. 1, 1 is a drum-shaped photoreceptor that rotates in the direction of the arrow, 2 is a corona discharger that uniformly charges the surface of the photoreceptor 1, and 3 is a photoreceptor of unnecessary parts other than those where electrostatic images are formed. Exposure means 4 is for erasing the charge on the photoreceptor 1, and image exposure means 4 is an image exposure lamp 5 shown in FIG. ,6
7 and 8 are a developing device that develops an electrostatic image into a toner image, an exposure unit that removes static electricity from the photoreceptor 1 before transferring the toner image to recording paper, and an i-electronic device for the photoreceptor 1 and the toner image. 9 is a corona discharger for transferring the toner image onto the recording paper fed to the photoreceptor 1;
0 is a corona discharger for separating the recording paper to which the toner image has been transferred from the photoreceptor 1; 11 is a corona discharger for facilitating the removal of residual toner on the surface of the photoreceptor 1 to which the toner image has been transferred; 12 Removes residual toner from photoreceptor 1
- a cleaning device 13 is a photoconductor 1 from which residual toner has been removed;
This is an exposure means for eliminating static electricity from the surface of the corona discharger 2 and then stably charging it again by the corona discharger 2.

In this electrostatic recording device, the photoreceptor 1 is determined from the discharge voltage or current of the corona discharger 2 and the charged potential of the photoreceptor by varying the thickness of the photoconductive layer as shown in FIG. The charging ability and the sensitivity determined from changes in the exposure amount and the surface potential of the photoreceptor 1 are different, and the temperature characteristics and deterioration characteristics are different depending on the material of the photoconductive layer, as shown in Figures 4 and 5. For photoconductors A and B, which have different values, or for example photoconductor B, whose surface potential changes depending on the operating temperature and degree of use even if the moxibustion conditions of the corona discharger 2 are constant, It can be exchanged for a different kind of thing, which can include different degrees of When the photoreceptor 1 is replaced, the type of photoreceptor 1 installed is specified using the operation section shown in FIG. As a result, the type information of the photoreceptor 1 is input to the central processing unit CPU, and the CPU determines the optimal discharge of the corona discharger 2 for the various photoreceptors mounted based on the information from the operation unit. Data about the mounted photoreceptor l is read from a memory that stores data such as conditions and light emission conditions of the image exposure lamp 5, and based on the data, the high voltage generator 14 is controlled via the digital-to-analog converter D/A I. so that the discharge voltage or current of the corona discharger 2 becomes a predetermined value, and the photocoupler 15 + triax 16 . Diac 1
The light emitting circuit including 7 and the like is controlled so that the amount of light emitted from the image exposure lamp 5 becomes a predetermined value. As a result, optimal charging and image exposure are performed on the mounted photoreceptor 1.

Although FIG. 2 only shows the control of the corona discharger 2 and the image exposure lamp 5, the developing bias applied to the developing sleeve of the developing device 6, other corona dischargers 8, 11, etc., and the exposure means 3, 7, . 13 can of course be similarly controlled as necessary. Further, the discharge conditions of the corona discharger 2, the light emission conditions of the image exposure lamp 5, etc. set by the CPU based on data from the memory are standard conditions that faithfully reproduce the original image density, etc. When changing the conditions according to preference, the standard conditions are changed by conventionally known means.

Note that if the memory stores only data regarding one type of photoreceptor, and if the memory is also replaced when the photoreceptor 1 is replaced with a different type, then the operation section in FIG. Can be omitted.

〔Effect of the invention〕

According to the present invention, most of the configurations other than the photoreceptor of electrostatic recording devices equipped with different types of photoreceptors can be made common, so that electrostatic recording devices can be manufactured with high productivity and at low cost. Furthermore, an excellent effect can be obtained in that adjustments are automatically made by mounting a different type of photoreceptor.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an example of the electrostatic recording device of the present invention;
FIG. 2 is a circuit diagram for controlling the discharge voltage or current of the corona discharger and the light amount of the image exposure lamp, and FIGS. 3 to 5 are graphs showing examples of changes in photoreceptor characteristics depending on the type of photoreceptor. DESCRIPTION OF SYMBOLS 1... Photoreceptor, 2.8-11... Corona discharger, 3.7.13... Exposure means, 4... Image exposure, 5... Image exposure lamp, 6
...Developing device, 12...Cleaning device,
14...High pressure generator, 15...Photocoupler, 16...Triac, 17...Diac. Patent applicant Konishiroku Photo Industry Co., Ltd. Agent Patent Attorney Haru Takashi −ゝ. Figure 1 Button Figure 2

Claims (3)

[Claims] (1) Different types of photoreceptors can be replaced and mounted, and the controller can control any one or more of the discharge voltage or current for charging and static elimination, the light amount for image exposure and uniform exposure, and the voltage for developing bias. The electrostatic recording device is capable of setting standard conditions suitable for the type of photoreceptor mounted on the device, and the control device reads data from a storage device storing data for setting the standard conditions to carry out the control. An electrostatic recording device characterized by: (2) The storage device is common to the different types of photoreceptors and stores the data for each, and the control device can specify data to be read from the storage device depending on the type of photoreceptor mounted. The electrostatic recording device according to scope 1. (3) The electrostatic recording device according to claim 1, wherein the storage device is replaced when the different type of photoreceptor is replaced.