JPS60149064A - Developing device - Google Patents

Abstract

PURPOSE:To attain monochromatic copying by a single developer carrying means only without mixing plural colors by providing the titled device with a cleaning means for removing a developer from the developer carrying means and a developer storing case having plural storing parts for storing different color developers. CONSTITUTION:Different color toner T1-T3 are stored in the rooms 31-33 of the 1st hopper group 3. A control part 19 selects the toner in one room of the 1st hopper group 3 on the basis of input information and supplies the selected toner to the 2nd hopper 4. The toner is supplied to a developing sleeve 2 and charged while being carried to be supplied to development. A cleaning member 5 is abutted upon the developing sleeve 2 on the basis of a command signal from the control part 19 detecting the end of copying of the designated number of copies and residual toner T' on the developing sleeve 2 is cleaned up. Even if different color toner is supplied to the developing sleeve, colors are not mixed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a developing device, and more particularly to a developing device that uses a developer of a selected color to obtain an image corresponding to the color of the developer.

Conventionally, in a copying machine, which uses this type of developing device to form an image, when a single copying machine performs monochrome copying or multi-color copying, developers of different colors are stored in each copying machine. You can prepare multiple types of developing devices of the same type and replace them, or store developing devices for each color of developer in advance in the copying device and use them for each color of developer by switching. Selecting a device.

The former method of replacing the developing device allows the device to be simplified and downsized, but it is very complicated to use. On the other hand, in the case of the latter, it requires a large space to accommodate the developing device in the device for the number of colors of the developer, and the space for the developing position and the diameter of the photoreceptor drum are large, making the entire device large. Both methods had drawbacks.

The present invention has been proposed in view of Item F. 2) A developing device that uses a developer of a selected color and obtains an image corresponding to the color of the developer is configured to be small and easy to handle. With the goal.

Embodiments of the present invention shown in nine drawings will be specifically described below.

FIG. 1 is a cross-sectional view schematically showing an embodiment in which the developing device Δ of the present invention is applied to a copying machine. In Figure 1, 1
The submarine 1 is rotatably supported in the direction of the arrow by a machine frame (not shown).
A latent image is formed on the peripheral surface of the role carrier by a latent image forming process (not shown).

3 is a first hopper group, and the illustrated example has three isolated chambers 31.
~63, each room 61~33 has black, sepia,
Developers Tl to T3 of different colors such as blue (hereinafter referred to as toner) are stored. 4. A second hopper provided below the first hopper group 3 uniformly supplies toner from a selected chamber of the first hopper group 3 to the developing sleeve 2L. This is a cleaning member that removes toner remaining after development on the developing sleeve 2F, and is provided downstream of the developing area of the developing sleeve, and contacts the circumferential surface of the developing sleeve only during one rotation of the developing sleeve 2 after the specified number of copies has been completed. It is designed to be in contact with each other.

The embodiment of the present invention consists of a manuscript.

The operation will be explained below based on the control flow shown in FIG. First, in FIG. 2, the toner color designation section 15, copy number designation section 161, paper size designation section 17, copy magnification designation section 1
Various designation information is input to the control unit 19 from the date. Control part 1
91d' Select a chamber in the first hopper group 3 in which toner of the designated color is stored based on the input information, and horizontally move the toner guide member 14 in the direction of the arrow to the lower part of the selected chamber. (It may be rotated at both ends of the movement.)
At the same time, it also indicates the amount of toner required and the timing of contact of the cleaning member 5 with the developing sleeve 2. The means for supplying the required needles of designated toner to the second hopper 4 include shutters 71 to 7 that open and close openings 201 to 203 formed at the bottoms of the chambers 61 to 33, for example.
What is necessary is to control the opening time of step 3. In addition, the shutter 71~
For example, move the 73 pieces horizontally in the direction of the arrow to open the openings 201-2.
Open and close 03.

The toner supplied to the second hopper 4 is transferred to the toner guide member 14.
to the center of the second hopper. Inside the second hopper 4, a plurality of screws 8.degree. 10.12 and auxiliary rollers 919', 11 are rotatably supported in the direction of the arrow. Therefore, the toner supplied to the second hopper 4 is agitated in the first stage by the screw 8 and the auxiliary rollers 9 and 9' on both sides, and agitated in the second stage by the screw 10 and the auxiliary rollers 11.

Through the third stage of agitation by the screw 12, the amount is leveled to be uniform in the generatrix direction of the developing sleeve, and then supplied onto the developing sleeve 2.

The toner supplied onto the developing sleeve 2 is charged while being conveyed by the rotation of the developing sleeve.

The toner regulated by the doctor blade 16 is transported to a developing position (developing area) facing the latent carrier 1 and subjected to development.

When the specified number of copies have been completed, the cleaning member driving mechanism shown in the figure is activated by a command signal from the control unit 19 that detects this end, and brings the cleaning member 5 into contact with the developing sleeve 2. Rotate once. During this one rotation, residual toner T on the developing sleeve
' is removed from the developing sleeve by the cleaning member 5, and the developing sleeve is removed. After the specified number of copies have been made, when the developing sleeve 2 completes one revolution, the cleaning member is separated from the developing sleeve 2 and the cleaned toner T' from the developing sleeve 2 falls into the collection case and is collected. Ru.

Therefore, since the cleaned surface of the developing sleeve 2 always moves to the lower part of the stirring position of the sixth stage, toner of a different color is designated for the first time, and the toner is developed via the first hopper and the second hopper. Even if it is supplied onto the sleeve 2, there is no risk of color mixing.

As described in detail above, according to the present invention, monochrome copying can be performed for a plurality of colors without color mixture using a single developer conveying means. In addition, since there is only one developing device, the entire device housing the developing device can be made compact and easy to handle.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the phenomenon device according to the present invention;
FIG. 2 is a block diagram of the control flow. 1 is a latent image carrier, 2ri is a viewing sleeve, 3 is a first hopper group, 4 is a second hopper, 5 is a cleaning member, 13ri
Doctor Blade. Patent applicant Canon Co., Ltd. Figure 2 Figure 1/

Claims (1)

[Claims] (1) In a developing device that uses a developer of a selected color to obtain an image corresponding to the color of the developer. A developer conveying means provided opposite to the latent image carrier and conveying the developer to the developing area, and a cleaning means provided downstream of the developing area removing the developer from the developer conveying means, each having a different color. a developer storage container having a number of storage portions for storing developer; A developing device comprising means for supplying the developer supplied from a selected storage section of the developer storage container to the developer transporting means.