CN1220117C - Color image forming device and toner feeder - Google Patents

Abstract

Provided is a compact color image forming device whose color print forming time is short and a toner replenishing device used in the device. A transfer belt (20) is obliquely arranged so that a height level is different between one end side and the other end side of a traveling side (21) where plural image forming units 4M, 4C, 4Y and 4Bk are arranged.

Description

Color image forming device and toner supply device

Technical field

The present invention relates to a color image forming apparatus and a toner supply apparatus used in the color image forming apparatus.

Background technique

The color image forming methods of the color image forming apparatus are roughly classified into four types: the transfer drum method, the intermediate transfer method, the Image on Image method, and the tandem method. The so-called transfer drum method is to wind the transfer paper on the surface of the transfer drum composed of a dielectric film so that it is opposite to the photoreceptor, and pass the yellow (Y), magenta (M), cyan (C), black ( BK) So-called electrostatic latent image formation is performed for each color, and the electrophotographic process of development and transfer sequentially superimposes the toners of each color on the transfer paper, thereby obtaining a color image. "The so-called intermediate transfer method" is to make a full-color image by sequentially transferring the toner images of each color on a drum or belt called an intermediate transfer body without using a transfer paper used in a transfer drum method and The image is transferred to the transfer paper at one time. The so-called "Image on Image method" is to directly repeat the corresponding yellow (Y), magenta (M), cyan (C) on the transfer drum. ), black (BK) each color so-called electrostatic latent image formation, development, transfer electrophotographic process and transfer the image on the transfer paper. The so-called "tandem method" is a method in which the images formed by the image forming units are sequentially superimposed and transferred on a single transfer paper that is transferred and conveyed so as to obtain a full-color image on the transfer paper.

The color image forming apparatuses of the above-mentioned systems have their advantages and disadvantages, and the tandem color image forming apparatuses can use many kinds of transfer paper. The quality of a full-color image is also high, and a color image can be obtained at a high speed. It has the so-called excellent quality. In particular, the ability to obtain a full-color image at high speed is a unique property not possessed by other color image forming apparatuses.

In this tandem image forming apparatus, four image processing units must be arranged side by side on one running side of the transfer belt. Usually, the upper running edge of the transfer belt is extended in the horizontal direction, and four image-making units are usually arranged on the transfer belt. If these imaging units are arranged in a row on the transfer belt, it will become an imaging device with a large width, requiring a large arrangement space.

Therefore, in JP-A-10-239938, an image forming apparatus that makes the transfer belt vertically stand up is described. With such a structure, since each image making unit is arranged upright along the transfer belt, an image forming apparatus can be provided. An imaging device with a small width and a small installation space.

Contents of invention

However, in an image forming device in which the transfer belt is vertically erected, the casing is unavoidably high, so the top of the casing, as seen in many printing machines (or printers) in recent years, is used as a paper discharge slot. In the current image forming apparatus, there is a problem of inconvenient operation because the position of the paper discharge slot is too high.

The present invention, in view of the above-mentioned problems in the prior art, provides a color image forming apparatus and a toner supply apparatus used in the color image forming apparatus, the color image forming apparatus can be more compact, and, even if The workability is not bad even if the upper part becomes a paper output chute.

In order to achieve the above object, in the color image forming apparatus of the present invention, a plurality of image-making units are arranged opposite to the transfer belt device that conveys the transfer material, and sequentially transfer the printing material to the transfer material conveyed by the transfer belt device. The image formed on each of the above-mentioned image-making units is characterized in that: the adjacent image-making units among the plurality of image-making units, for the height direction of the color image forming device and the width perpendicular to the height direction In both directions, the adjacent image-making units are partly overlapped, and the above-mentioned transfer belt unit is arranged obliquely, so that the heights of one end side and the other end side of the driving side of the plurality of image-making units are different.

In the transfer belt unit according to the present invention, it is more effective if the endless belt is wound on a plurality of pulleys and the plurality of imaging units are arranged along the running side of the belt.

It is more effective if the transfer belt device of the present invention is disposed at an inclination so that the paper supply side of the transfer material is below the paper discharge side.

If in the above-mentioned transfer belt device of the present invention, the inclination angle of the traveling side on which a plurality of imaging units are arranged is 35° to 55°, the effect will be even better.

It is more effective if the above-mentioned transfer belt unit of the present invention is rotatable about the axis of one transfer pulley constituting the running side on which the above-mentioned plurality of image processing units are arranged.

If the above-mentioned image-making units of the present invention are made to have a rotating image carrier, when the above-mentioned image-making unit sees the above-mentioned transfer belt device in the third quadrant from the central axis of rotation of the image carrier, then use the toner to develop the image carrier. When the unit of the latent image formed above is in the fourth quadrant, the effect is better.

If make above-mentioned each image-making unit have the image carrier that rotates, above-mentioned image-making unit is on the center axis that this image carrier rotates, and when above-mentioned transfer belt device is in the third quadrant, the toner remaining on the image carrier can be cleaned. If the cleaning unit is in the second quadrant, the effect of the present invention is better.

The effect of the present invention is good if the cleaning unit of the lower imaging unit and the developing unit of the upper imaging unit of the adjacent imaging units are arranged vertically at positions where they partially overlap each other.

In the present invention, it is more preferable that the receiving container for storing the waste toner recovered by the cleaning unit is disposed in a space formed below the transfer belt unit with a triangular cross-sectional shape.

If there is a writing unit for performing optical writing with respect to each of the image forming units, the writing unit is arranged obliquely so as to be substantially parallel to the transfer belt. Then the effect of the present invention is better.

If the heating and fixing unit is arranged on the downstream side of the transfer material transfer direction of the transfer belt device, and the heating and fixing unit is located on a higher level than the writing unit, the effect of the present invention is better.

If a space outside the machine is provided between the transfer device of the above-mentioned transfer belt device and the above-mentioned writing unit. Then the effect of the present invention is better.

If the above-mentioned space outside the machine is constituted by a box shape between the above-mentioned heating and fixing unit and the above-mentioned writing unit. Then the effect of the present invention is better.

If the concave shape of the above-mentioned box is a paper discharge slot for the transfer material discharged outside the machine. Then the effect of the present invention is better.

If the above-mentioned thermal fixing unit is provided with a pressure roller with a fixing roller pressed against the lower part of the fixing roller, a heating roller heated by a heating unit, a belt wound on the above-mentioned fixing roller and the heating roller, and the above-mentioned heating roller is located on the above-mentioned fixing roller. The effect of the present invention is better if the heating roller is located on the upstream side of the conveying direction of the transfer material and the heating roller is located below the fixing roller.

If there is a reversing unit provided on the downstream side of the conveyance direction of the above-mentioned heating and fixing unit, the transfer material reversed by the reversing unit is returned to the double-sided conveying path on the upstream side of the above-mentioned transfer belt. The effect of the present invention is better when the printing belts are arranged obliquely almost in parallel.

The effect of the present invention is further enhanced if the container containing the toner supplied to the developing unit of each of the image processing units is located at a position separated from the developing unit of each of the image processing units.

The effect of the present invention is further improved when the toner container is arranged in a space formed above the transfer belt unit with a cross-sectional shape that is as large as a triangle.

If the image forming unit including the image forming units and the transfer belt unit is separated from the toner receiving container, it can be detachably attached to the image forming apparatus. Then the effect of the present invention is better.

With regard to the toner device for supplying toner to the developing units of the above-mentioned image-making units used in the color image forming apparatus described in any one of claims 1-17, if the toner supply device for supplying toner passes The effect of the present invention is further improved when the powder pump supplies the toner from the powder receiving container to the developing unit.

If the powder pump is a suction type uniaxial eccentric screw pump near the powder receiving container, and the toner supply device supplies air to the powder receiving container through an air supply unit, the present invention is more effective.

The effect of the present invention is better if the toner supply device supplies the toner in the powder receiving container to the developing unit through a flexible toner delivery pipe.

Description of drawings

Fig. 1 is a schematic diagram showing the overall configuration of the color image forming apparatus of the present invention.

FIG. 2 is an explanatory view showing an enlarged image processing unit in the color image forming apparatus of FIG. 1. FIG.

FIG. 3 is an explanatory view showing the arrangement relationship in the color image forming apparatus of FIG. 1. FIG.

FIG. 4 is an explanatory view showing an embodiment of the toner supply device of the present invention.

Detailed ways

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a schematic diagram showing a color laser printer (or printer) as an example of a color image forming apparatus related to the present invention. The part 2 is a structure in which the imaging part 3 is arranged above the main body. On the image forming section 3, a transfer belt unit 20 is arranged obliquely with the paper supply side facing downward and the paper discharging side facing upward. The transfer belt device 20 has a seamless transfer belt 20 wound on a plurality of transfer pulleys 22, in this example four transfer pulleys 22, on the upper running edge 21 of the transfer belt 20 The array configurations are magenta (M), cyan (C), yellow (Y) and black (BK) image forming units 4M, 4C, 4Y, and 4BK in order from the bottom.

FIG. 2 is an explanatory diagram showing an enlarged image processing unit 4C. In this figure, each device is indicated by adding symbols M, C, and Y to distinguish each device constituting each image processing unit unit by unit.

In FIGS. 1 and 2, each of the image processing units 4M, 4C, 4Y, and 4BK is provided with a photosensitive drum 5 as an image carrier, which is driven clockwise by a driving unit not shown in the drawings. Around the photosensitive drum 5 are provided a charging roller 6 as a charging unit, an optical writing unit 7 for writing with laser light by an optical writing unit 8 , a developing unit 10 as a developing unit, and a cleaning unit 9 as a cleaning unit. The developing device 10 is a two-component developing device composed of toner and carrier, and the toner is replenished by a device described later in accordance with the amount of consumed toner.

Next, the image-making operation of the full-color printer of the color printing machine (or printer) shown in FIG. 1 will be described through the image-making unit 4M for magenta.

A LD (laser diode) not shown in the figure is excited to irradiate laser light on the polygon mirror 80, and the photosensitive drum charged by the charging roller 6M is charged by the writing unit 8 that guides the reflected light on the photosensitive drum 5M through a cylindrical lens. Optical writing of an optical image developed with a magenta toner was carried out on the 5M. An electrostatic latent image based on image data transmitted from a host computer such as a personal computer is formed on the photosensitive drum 5M by this optical writing, and the latent image is changed into a visible image of magenta toner by a developing device. In addition, the writing unit 8 is required to have a configuration capable of writing reflected light from a single polygon mirror 80 onto each photosensitive drum 5 . At this time, by arranging the writing unit 8 and the transfer belt 20 obliquely substantially parallel to each other, the optical path length to each photoreceptor can be easily made constant.

The paper specified as the transfer material is supplied from the paper supply slip 2 , and the supplied paper hits the recording roller 23 provided on the upstream side of the transfer belt 20 in the transport direction once. Therefore, the paper can be transferred to the transfer roller 120 synchronously with the visible image, and then reach the transfer position opposite to the photosensitive drum M by the running of the belt. At this transfer position, the visible image of the magenta toner is transferred onto the paper by the action of the transfer roller 20 disposed on the inner side of the transfer belt 20 .

In the same manner as the image forming operation described above, the other image forming units 4C, 4Y, and 4BK also form visible images using the respective toners on the surfaces of the respective photosensitive drums 5 . These visible images are superimposedly transferred each time the paper conveyed by the transfer belt 21 reaches each transfer position. Therefore, this color printing machine (or printer) overlaps and transfers the color image on the paper with almost the same short time as the black-and-white photo.

The transferred paper is separated from the transfer belt 20 and fixed by a fixing device. The fixing device of this example adopts a belt fixing method, and a relatively soft fixing roller 32 such as a sponge roller is pressed against a rigid heating roller 31 . The belt 34 is wound around the fixing roller 32 and the heating roller 33 disposed upstream in the paper conveying direction. This belt fixing method has advantages such as shorter heating time than the roller fixing method.

The fixed paper is either discharged out of the machine as it is, or the reverse unit 42 for duplex printing can be selected and switched. If you choose to discharge paper outside the machine, turn the paper upside down, and discharge the paper inside on the paper discharge box 40 arranged on the top of the device body. As far as the reverse paper discharge of the printing machine (or printer) is concerned, it is almost a necessary condition for arranging the printed matter in the order of the sides. Also, if double-sided printing is selected, the paper is conveyed to the reversing unit 42 , and the paper is conveyed to the double-sided conveyance path 43 after being reversed inside and outside. The double-sided conveyance path 43 is arranged obliquely below the transfer belt 20 and almost parallel to the transfer belt 20 . By arranging the double-sided conveyance path 43 in this way, the conveyance path can be shortened and the used paper can be pulled out together with the transfer belt when a paper jam occurs. The transfer paper that has passed through the double-side conveying path is image-formed on the rear surface in the same manner as described above, and then discharged to the paper discharge chute 40 .

According to the present embodiment described above, since the double-sided conveyance path 43 is arranged so as to be inclined parallel to the transfer belt 20, the transferred transfer material after fixing is reversed and returned to the recording drum 23 side with the shortest distance. For example, if the two-side conveyance path 43 is horizontally arranged, although the passage can pass through the vicinity of the top of the upper case, in this case, the transfer material must be lowered to the level of one end, thereby making the conveyance stroke longer.

Since the color printing machine (or printer) constituted in this way is provided with four image-making units 4M, 4C, 4Y, and 4BK, during conveyance on the paper transfer belt device 20, the toner images of each color are overlapped and transferred sequentially. Compared with the intermediate transfer method in which a single image-making unit is used, toner images are superimposed on the intermediate transfer body, and then collectively transferred to the same paper, the time can be greatly shortened. At this time, even if this color printing machine (or printer) uses four image-making units 4M, 4C, 4Y and 4BK, the running side 21 of the image-making unit that can configure the transfer belt 20 as described above is inclined, so as shown in FIG. As shown, in adjacent image processing units 4, the cleaning device 9 and the developing device 10 of the adjacent unit are arranged to overlap each other in the vertical direction. For example, in adjacent image processing units 4M and 4C, the cleaning device 9M of the image processing unit 4M and the developing device 10C of the image processing unit 4C are arranged to overlap each other in the vertical direction. Therefore, the length in the left-right direction can be shortened compared to the case where the transfer belt is arranged horizontally.

However, as shown in FIG. 3, if the inclination angle of the transfer belt 20 is θ, and the angle θ is small, the adjacent developing device 10 and the cleaning device 9 cannot be arranged to overlap as described above. However, if the angle θ is close to When it is 90°, although the length in the left and right directions can be greatly reduced, the vertical direction must have a certain height, so that the position of the paper discharge slot becomes too high. It is preferable to set the inclination angle θ between 35° and 55°. If the inclination angle is set between 35° and 55°, as shown in FIG. 3 , when the transfer belt 20 takes the rotation center O of the photosensitive drum 5 as the origin and is close to the third quadrant, the developing device 10 The developing position, that is, the position close to the magnetic brush formed on the developing roller 11 is within the fourth quadrant of the photosensitive drum 5 .

In this way, the developing device 10 configured according to the requirement of performing development in the fourth quadrant of the photosensitive drum 5 can reduce toner drop compared with, for example, the same height as the center of rotation of the photosensitive drum 5 or a developing device arranged above the horizontal plane. The advantages. And the inclination angle of the transfer belt 20 is selected in the range of 35° to 55°. When the transfer belt 20 takes the rotation center O of the photosensitive drum 5 as the origin and is close to the third quadrant, the cleaning blade of the cleaning device 9 can The sheet 90 and the brush 91 are close to the second quadrant of the photoreceptor 5 .

The cleaning device 9 arranged in this way has better cleaning performance than a device in which a cleaning device such as a cleaning blade is positioned directly above the photoreceptor 5 .

In the color printing machine (or printer) in which the transfer belt 20 is inclined and the respective image processing units 4M, 4C, 4Y, and 4BK are arranged in the direction of its inclination, the transfer belt 20 as shown in FIG. or printer) on the diagonal of the main body. In this arrangement, the running side 21 of the transfer belt 20 is driven from the bottom to the top. If a paper feeding part is provided at the lower end of the main body and a paper discharge part is provided at the upper end side, it is possible to make the transfer belt 20 from the paper feeding part to the transfer belt. The conveying distance of the belt 20 is shortened from the conveying distance of the transfer belt 20 to the discharge section.

In addition, the box body of an image forming device such as a printing machine (or printer) is roughly a cuboid. A space with almost triangular cross-section is formed. In this embodiment, the toner receiving container 100 is provided in the upper space, and the waste toner tank 93 is provided in the lower space. At this time, since the toner receiving container 100 and the waste toner tank 93 have a very high degree of freedom in shape, it is possible to provide an inclined surface in the same direction as the inclined surface of the transfer belt 20 in the same direction as the shape that fits in the space forming a triangle. Since the toner receiving container and the waste toner tank 93 are opposed to each other, it is possible to surely prevent the space having a triangular cross-section from becoming a large dead space.

Next, a description will be given of a toner supply device for supplying the tunable toner contained in the toner receiving container 100 to the image processing units 4M, 4C, 4Y, and 4BK.

The one-axis eccentric screw pump of the suction type powder pump 1 is provided near the developing device 10 or as an integral body. The composition of this powder pump 110 is shown in Figure 4, has: the eccentric spiral rotor 142 that is made of rigid material such as metal, is made of elastic body such as rubber, and is formed with two spiral stators 143, Bolts 144 that surround the rotor and stator and are made of a resin material forming a powder conveying passage, the rotor 142 is rotationally driven by a gear 44 integrally connected to the drive shaft 15 through a pin connector. In addition, symbol 147 is an electromagnetic clutch, through which the operation of the powder pump 110 is controlled.

In addition, a toner suction portion 140 is provided at the front end of the above-mentioned bolt 144, that is, the right end in FIG. Tube 149 is connected. It is very effective to use a flexible tube with a diameter of 4 to 10 mm. As the toner delivery tube 49, it is very effective to use a tube made of a rubber material (such as polyurethane, nylon, EPDM, silicone, etc.) with excellent toner resistance. The flexible tube can be easily bent in the up, down, left, and right directions.

The toner supply device configured in this way is well known, and the one-axis eccentric screw pump as the powder pump 110 can continuously and quantitatively transfer the powder with a high solid-gas ratio, and can obtain accurate toner proportional to the number of revolutions of the rotor 144. dose delivery. Therefore, when the toner is commanded by the image density detection, the powder pump 110 operates to supply a required amount of toner to the developing device.

In addition, the setting part provided on the image forming apparatus body on the setting toner receiving container 1 and the developing device 10 are constituted as a separate unit. The nozzle 160 having a circular cross section sets the toner container 100 on the setting portion of the main body of the image forming apparatus from above. The cutting-edge device 161 having a rectangular cross-section is integrally formed or bonded on the upper part, and the air supply passage 162 and the toner supply passage 163 are provided on the cutting-edge device 161 . The inside of the nozzle 160 has a double-pipe structure. The toner supply passage 163 bends leftward in the drawing at the lower end of the nozzle 160 , and a toner connection pipe 65 to which a toner transfer pipe 149 is connected is provided at one end thereof. In addition, the air supply passage 162 bends to the right in the drawing above the toner supply passage 163 and reaches the air connection port 164 .

In the present embodiment, the air connection port 164 is connected to the air pump 151 as air supply means through the air transfer pipe 152 . When the air pump 151 operates, air is injected from the pump into the toner receiving container 100 through the air delivery pipe 152 and the air supply line 162 . Then, the air sprayed into the toner receiving container 100 passes through the toner layer to diffuse and fluidize the toner.

In this way, the toner supply device can be efficiently supplied with toner even if the image processing units 4M, 4C, 4Y, and 4BK are separated from the toner receiving container 100, and the installation position of the toner receiving container 100 does not have to be determined. The selection of units 4M, 4C, 4Y and 4BK can be set at any position. Therefore, in a color printing machine (or printer) in which the transfer belt 20 is inclined and the image processing units 4M, 4C, 4Y, and 4BK are arranged along the inclination angle, between the image processing units 4M, 4C, 4Y, and 4BK, There is no need to process a gap for the toner receiving portion, and the image processing units 4M, 4C, 4Y, and 4BK can be arranged closer together.

In addition, in the embodiment shown in FIG. 1 , the belt fixing device 30 is used, but although it is the belt fixing device 30 , since the paper is fed to the fixing device from obliquely below along the inclined transfer belt 20 , the heating roller 33 is disposed It is below the height level of the fixing drum 32 . Therefore, even if the width of the matching gap between the fixing roller 32 and the pressure roller 31 is sufficiently ensured, the paper is conveyed from the gap almost horizontally, and can be smoothly conveyed to the paper discharge chute on the upper part of the background. When the horizontal direction is conveyed into the gap between the fixing roller 32 and the pressure roller 31, when passing through, it is conveyed obliquely downward. When the paper is conveyed to the paper discharge chute 40 on the upper part of the body, a large-angle turning mechanism must be provided.

In the embodiment shown in FIG. 1 , the fixing device 30 is disposed above the inclined transfer belt 20 and above the plane that is higher than the optical writing device 8 . And between the fixing device 30 and the optical writing device 8 , a substantially V-shaped concave portion 41 for determining the number of stock sheets in the paper discharge slot 40 is formed. A space outside the machine exists between the fixing device 30 and the optical writing device 8 through the concave portion 41 . With this configuration, it is less likely that the optical writing device 8 receives heat from the fixing device 30 directly, thereby greatly reducing the change in optical characteristics of the optical writing device 8 caused by the heat from the fixing device 30 .

In addition, in the embodiment shown in FIG. 1, the transfer belt 20 has a structure rotatable around at least one of the pulleys 22 of the running side 21. With this structure, even if a paper jam occurs on the transfer belt, It can also be easily handled, and since the transfer belt 20 is printed in black and white, the pulley 22a is lowered below the position indicated by the dotted line. The transfer belt 20 is brought into contact with the monochrome image forming unit 40BK when it descends, and is separated from the photosensitive drum 5 of the other image forming unit 4 .

According to one configuration of the present invention, the transfer belt device is arranged obliquely, so that the height level of one end side and the other end side of the driving side where a plurality of image forming units are arranged is different, so that the vertical and horizontal directions of the image forming apparatus miniaturization.

According to another configuration of the present invention, in addition to the above-mentioned effects, the length of the transport stroke of the discharged transfer material can be shortened.

According to still another configuration of the present invention, in addition to the above effects, toner drop from the developing unit can be reduced, and good cleaning properties can be ensured.

According to another configuration of the present invention, in addition to the above-mentioned effects, it is possible to easily perform the handling of paper jams in the transfer belt unit.

According to still another structure of the present invention, the effect of miniaturization described above can be more effectively obtained.

According to a further embodiment of the invention, in addition to the above-mentioned effects, dead spaces in the device can also be minimized.

According to another configuration of the present invention, in addition to the above effects, a single writing unit can be used to write to a plurality of imaging units, and it is easy to obtain the same optical path length.

According to other configurations of the present invention, in addition to the effects described above, variations in the characteristics of the optical system can be significantly reduced.

According to still another configuration of the present invention, in addition to the above-mentioned effects, the passing transfer material can be easily conveyed upward even when a belt fixing device is used.

According to another configuration of the present invention, in addition to the above-mentioned effects, the stroke for double-sided conveyance in the device can be shortened.

According to another embodiment of the invention, in addition to the above-mentioned effects, dead spaces in the device can also be minimized.

According to still another configuration of the present invention, in addition to the above-mentioned effects, it is possible to provide a toner supply device which can reliably achieve the so-called effect of minimizing the dead space in the device.

Claims (22)

1, a kind of coloured image forms device, and a plurality of systems are resembled the unit facing to the belt transfer device configuration of carrying transfer materials, and the transfer materials of carrying facing to this belt transfer device in turn transfer printing be formed on above-mentioned each make the image that resembles on the unit, it is characterized in that:

The adjacent system that described a plurality of system resembles in the unit resembles the unit, overlap in order to make described adjacent system resemble a unit part on the both direction that forms height of devices direction and the Width vertical at described coloured image with this short transverse, with above-mentioned belt transfer device tilted configuration, and it is different to make above-mentioned a plurality of system resemble the height levels distolateral and on another is distolateral on the limit of travelling of unit.

2, color imaging device as claimed in claim 1 is characterized in that: above-mentioned belt transfer device has rolls up the endless belt that hangs on a plurality of belt wheels, and above-mentioned a plurality of systems resemble the travel limit configuration of unit along this band.

3, color imaging device as claimed in claim 1 or 2 is characterized in that: above-mentioned belt transfer device tilted configuration, so that the supply side of above-mentioned transfer materials is positioned at the paper discharging side below.

4, color imaging device as claimed in claim 1 or 2 is characterized in that: above-mentioned belt transfer device to dispose the angle of inclination that a plurality of systems resemble the limit of travelling of unit be 35 °～55 °.

5, color imaging device as claimed in claim 1 or 2 is characterized in that: above-mentioned belt transfer device can rotate around the axle center of a belt wheel, and described belt wheel formation disposes the limit of travelling that above-mentioned a plurality of system resembles the unit.

6, color imaging device as claimed in claim 1 or 2, it is characterized in that: above-mentioned each system resembles the carrier that resembles that the unit has rotation, above-mentioned system resembles the unit and looks resembling the rotating central axis of carrier from this, when above-mentioned belt transfer device was in third quadrant, the developing cell that is formed on the latent image on the carrier by toner development was configured in the four-quadrant.

7, color imaging device as claimed in claim 1 or 2, it is characterized in that: above-mentioned system resembles the unit and has the rotating carrier that respectively resembles, above-mentioned system resembles the unit and resembles on the rotating center line of carrier at this, when above-mentioned belt transfer device was in third quadrant, cleaning remained in the cleaning unit that resembles on the carrier and is configured in second quadrant.

8, color imaging device as claimed in claim 1 or 2 is characterized in that: the system that adjacent above-mentioned system resembles unit below is configured in mutually along the vertical direction as the developing cell of unit as the system of the cleaning unit of unit and top and makes on the position that a part overlaps mutually.

9, color imaging device as claimed in claim 8 is characterized in that: the receiving vessel of accommodating the used toner that is reclaimed by above-mentioned cleaning unit is configured in the section configuration that the is formed at above-mentioned belt transfer device below space triangular in shape.

10, color imaging device as claimed in claim 1 or 2 is characterized in that: have above-mentioned relatively each system and resemble the unit and carry out the writing unit that light writes, this writing unit and above-mentioned transfer belt be tilted configuration greatly extremely abreast.

11, color imaging device as claimed in claim 1 or 2, it is characterized in that: in the transfer materials transhipment direction downstream side configuration heat fixer unit of above-mentioned belt transfer device, this heat fixer unit is positioned on the high surface level of the above-mentioned writing unit height of aspect ratio.

12, color imaging device as claimed in claim 1 or 2 is characterized in that: the space outside the machine is set between above-mentioned heat fixer unit and above-mentioned writing unit.

13, color imaging device as claimed in claim 12 is characterized in that: the above-mentioned machine external space constitutes according to the box shape that caves between above-mentioned heat fixer unit and above-mentioned writing unit.

14, color imaging device as claimed in claim 13 is characterized in that: the concave shape at above-mentioned casing is row's paper groove of the transfer materials of discharge outside machine.

15, color imaging device as claimed in claim 10, it is characterized in that, above-mentioned heat fixer unit has: the photographic fixing cylinder is by being pressed in pressing roller on this photographic fixing cylinder bottom, hanging over band on above-mentioned photographic fixing cylinder and this heated roller by the heated roller of heating unit heating and volume, above-mentioned heated roller is positioned at the upstream side of the transfer materials throughput direction of above-mentioned photographic fixing cylinder, and above-mentioned heated roller is positioned at the below of above-mentioned photographic fixing cylinder.

16, color imaging device as claimed in claim 10, it is characterized in that: have the roll-over unit that the direction downstream side is provided with that transports in above-mentioned heat fixer unit, transfer materials by the upset of this roll-over unit is turned back to the upstream side and the two sides carrying path of above-mentioned transfer belt, and this two sides carrying path and above-mentioned transfer belt be tilted configuration abreast almost.

17, color imaging device as claimed in claim 1 or 2 is characterized in that: accommodate and supply with the receiving vessel of toner that above-mentioned each system resembles the developing cell of unit and be positioned on the position that the developing cell that resembles the unit with above-mentioned each system separates.

18, color imaging device as claimed in claim 1 or 2 is characterized in that: the section configuration that above-mentioned toner receptacle is configured in the top that is formed at above-mentioned belt transfer device is big to leg-of-mutton space.

19, color imaging device as claimed in claim 17 is characterized in that: comprise system that above-mentioned each system resembles unit and above-mentioned belt transfer device and resemble the relative independently image processing system with above-mentioned toner receiving vessel of portion and install dismantledly.

20, a kind of developing cell that above-mentioned each system of any one described color imaging device resembles the unit in being used in claim 1 to 19 is supplied with the toner feed device of toner, it is characterized in that:

This toner feed device is supplied with toner from above-mentioned powder receiving vessel to above-mentioned developing cell by the powder pump.

21, toner feed device as claimed in claim 20, it is characterized in that: above-mentioned powder pump is the single shaft eccentric screw pump that is configured near the attraction type of above-mentioned powder receiving vessel, and this toner feed device passes through the air feed unit to above-mentioned powder receiving vessel air supply.

22, as claim 20 or 21 described toner feed devices, it is characterized in that: this toner feed device passes through to carry the flexible pipe of toner the above-mentioned developing cell of the toner supply of above-mentioned powder receiving vessel.

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