JP3420872B2 - Image forming device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] TECHNICAL FIELD The present invention relates to a copier, a facsimile
Related to image forming devices such as millimeters and printers
You. [0002] 2. Description of the Related Art Conventionally, as this type of image forming apparatus,
Development having a plurality of developing devices arranged around a rotation center line
Unit around the rotation center line, the latent image
Move each developing device to the developing position facing the carrier, and
Equipped with a rotary developing device for developing the latent image on the latent image carrier
Image forming apparatuses are known. [0003] However, the above-mentioned image type
In the rotary developing device of the developing device, the developing device floating in the developing device
Over time, for example, through the developer case opening
Partially exposed and in a predetermined direction in the area facing the latent image carrier
And supplies the developer to the latent image carrier.
Adhering or accumulating on the developer wall above the image agent supply member
Would. The developer is supplied to the developer unit
The developer due to shock or vibration generated by rolling
The developer unit is dropped as a lump on the supply member,
Being discharged outside the developing unit due to centrifugal force caused by rolling
There is. Here, a transfer material for transferring the developed image of the latent image carrier
Alternatively, the transfer material on which the developed image has been transferred is
Transfer material transport device is provided to transport
The developer discharged outside the developing unit falls under its own weight
Then, the dropped developer adheres to the transfer material,
The toner drop image that occurs due to the
The developer of a color different from the color of the transferred image falls and the transfer material
Will lead to mixed color images caused by adhesion to
There was a problem. Further, for example, as the developer, a magnetic developer
Developer having a magnet inside the magnetic developer
Using a developing device that supplies the latent image carrier by a supply member
If the developer supply member is
The developer that is being used is
The developer may be discharged outside the image
Occurs, the inside of the image forming apparatus is contaminated with the developer,
The problem of sticking to the drive system and generating abnormal noise
There was also. The present invention has been made in view of the above problems.
The purpose of this is to
The developer discharged out of the developing unit with the rotation causes the inside of the device to become dirty.
Transfer material transfer device below the dyeing or developing unit
To prevent it from adhering to the transfer material conveyed by
Providing an image forming apparatus that can prevent occurrence of toner-depleted images
It is to be. [0006] [MEANS FOR SOLVING THE PROBLEMS] To achieve the above object
According to a first aspect of the present invention, there is provided a latent image carrier on which a latent image is formed.
And a plurality of developing devices arranged around the rotation center line.
Rotating the developing unit around the rotation center line,
Move each developing unit to the developing position facing the latent image carrier
A rotary developing device for developing a latent image on the latent image carrier,
A transfer material for transferring the developed image of the latent image carrier or
The transfer material on which the image has been transferred is placed below the developing unit.
An image forming apparatus having a transfer material transport device for transporting
hand,the aboveOf the developing device at the developing positionthe abovePresent on latent image carrier
Partially exposed from the developer case opening to supply the image agent
Developer supply member,the aboveArea facing the latent image carrier
From the area,the aboveLocated below the developer unitthe aboveTranscription
Receives developer falling toward the transport path of the material transport device
Developer receiving memberAnd the developing unit is rotatably supported.
And a developing device unit support for holding the developing device unit.
Of the developing device at a predetermined first rotation position on the support
Attach a developer collection container to the opening for collecting stored developer
And the developing device to which the developer collecting container is attached is connected to the developing device.
Rotating to a predetermined second rotational position on the unit support,
The developer is collected in the developer collection container through the opening.
And the second rotation from the first rotation position.
The developer is contained during rotation of the developer unit to the position.
The developer receiving member is located at a position overlapping the path along which the developer moves.
Removably attachedIt is characterized by having. In the first aspect of the present invention, the developing device unit
Supplying the developer to the latent image carrier as the knit rotates
Developer supply member and the latent image carrier are opposed to each other.
Discharged from the developing device from the developing area,
Transfer of the transfer material transfer device located below the developing unit
The developer dropped by its own weight toward the path is transferred to the developer receiving member.
Will receive. Thereby, the developed image on the latent image carrier is transferred.
The transfer material to be transferred or the transfer material to which the developed image has been transferred is
While being transported along the transport path, the dropped developer is transferred.
Prevents sticking on materials.In addition, the development
The second rotation from the predetermined first rotation position on the container unit support
The first rotation position during rotation of the developing unit to the rotation position;
At the opening for collecting the developer contained in the developing unit
Position that overlaps the path along which the attached developer collection container moves
During the developing operation, the developer receiving member provided at
The toner from the development area onto the transfer material.
To prevent. When replacing the developer, the developer
By removing the receiving member, the developer receiving member is stored.
To clean the developer
From the developer opening at the developer collecting position with the best collecting property.
Make it possible to collect the imaging agent. [0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention is applied to an image forming apparatus.
Color electrophotographic printer (hereinafter referred to as printer)
One embodiment applied will be described. Fig. 1 shows this embodiment
1 is a schematic configuration diagram of a printer according to an embodiment. First, this pudding
An outline of the entire data will be described. In FIG.
The photosensitive drum 1 as a holding body is driven to rotate in the direction of arrow A.
To the charging charger 2 as a uniform charging means.
After being more uniformly charged, the image is formed by the laser optical device 3.
Scanning exposure based on the information forms an electrostatic latent image on the surface
You. Here, the image information to be exposed is a desired full-color image.
Into yellow, magenta, cyan, and black color information
This is the obtained monochrome image information. Formed on the photosensitive drum 1
Each of the electrostatic latent images obtained is rotated by a rotary developing device 4 described later.
Yellow, magenta, cyan, and fixed developers
Is developed with black toner.
A color image is formed. Each color image formed on the photosensitive drum 1
Rotates in the direction of arrow B in FIG.
Yellow, magenta, and sheer on the intermediate transfer belt 5
For each color of black and black by the primary transfer charger 6
Next, it is superimposed and transferred. Superimposed on the intermediate transfer belt 5
Yellow, magenta, cyan, and black images
Automatic paper cassette 7 for both copying and manual feeding tray
7a through paper feed rollers 8, 8a and registration roller 9
Secondarily on transfer paper 10 as a transfer material conveyed to the transfer unit
The batch transfer is performed by the transfer charger 11. After transcription
Transfer paper 10 is placed on a rotary type
The sheet is conveyed on a conveying belt 15 as a copying material conveying apparatus, and is fixed.
The fixing device 12 fixes the toner image, and
Discharged outside the aircraft. It should be noted that the image is not transferred onto the intermediate transfer belt 5.
The toner on the photosensitive drum 1 is removed by the photosensitive cleaner 13.
Is removed from the photosensitive drum 1 by the
The toner on the intermediate transfer belt 5 that has not been transferred onto
If the intermediate transfer belt cleaner 14
Removed. Next, in the rotary developing device according to the present embodiment,
explain about. FIG. 2 is an exploded perspective view of the developing device, and FIG.
Is a section showing the internal structure of the developing unit 40 of the developing device.
FIG. 4 shows the upper and lower transport screws 86, 86 of the black developing device.
It is sectional drawing by the surface containing the central axis 52 of 91. In FIG.
In the rotary developing device, for example, black, cyan,
Developing devices for each of the four colors, yellow and magenta, were formed.
And rotate around the central axis in the printer body.
Developing unit with an almost cylindrical outer periphery
40, one-to-one corresponding to each developing unit, black and yellow respectively
-Four toners containing toner of magenta and cyan
Holding the containers 41, 42, 43, 44, and
Almost coaxial on the front side of the unit 40 in the center axis direction.
And a developing unit around the central axis.
Toner container unit 45 that rotates integrally with knit 40
And the developing unit 40 and the toner container unit.
(Hereinafter referred to as a revolver developing unit).
In the printer body in a position almost parallel to the center axis.
Riding container 46 and the toner container unit
45 is provided non-rotatably on the support plate 48 in front of the accommodation table so as to cover
Cover 47 provided. The revolver developing unit includes a housing 46
Is rotatably attached to the front support plate 48 of
The disc-shaped front end of the developing unit 40 is supported by the two support rollers 49.
The wall 50 is supported, and the disk unit of the developing unit 40 is
The center axis 5 of the tapered end protruding from the center of the rear end wall 51
2 through a center shaft insertion hole 54 formed in the rear plate 53 of the main body.
By supporting it rotatably, it can be compared inside the printer
For example, as shown in FIG.
Be parallel to each other in the same horizontal plane as the axis of rotation
It is positioned at a position and is rotatable. First, referring to FIG.
Mechanism for rotatably supporting developing unit 40
explain. In FIG. 2, the accommodation table 46 is
The holding plate 48, the rear support plate 55, and the front and rear ends
Each is fixed and reinforced with connecting rods 56, 57, 58.
Side cover 59. And this side cover
The notch 59 is formed by cutting out a portion shown by hatching in the figure.
a is formed. Note that this side
The cover 59 is a guide for preventing the developer scattered from the developing device.
Also functions as a metal member. The front support plate 48
An insertion hole 60 into which the developing unit 40 can be inserted is formed.
And the toner container unit besides the support roller 49
A mode for driving the toner supply roller provided on the knit 45
Gear 61 and a gear train driven by the motor 61 are attached.
Have been. Also, the connecting rod near the rear support plate 55
An intermediate plate 63 is attached to the portions 56 and 57.
3 fits into a positioning hole 63a drilled in the rear plate of the main body.
A positioning pin 63b is provided to protrude. The middle plate 63
Rotational position is provided on the positioning pin portion between the
The base end of the bracket 64 holding the determining roller 66 swings
Mounted as possible. And this bracket 6
Reference numeral 4 denotes a peripheral surface of the rear end wall 51 of the developing device unit.
At a predetermined position (in this embodiment, each of the four developing units)
(Totally correspond to four places) into the recess 65 formed at
Biased by a spring 67 in the opposite direction. The developing unit 4 is mounted on the front plate 68 of the main body.
Insertion hole into which the above-mentioned accommodation table 46 in which 0 is carried can be inserted.
The main body front side plate 68 and the main body rear side plate
53, the housing table 46 is slidably supported.
Up and down guides 70 and 71 are hung.
These are the accommodating parts guided by these guides 70 and 71.
Then, at the upper end and side of the side cover 59 of the accommodation table 46,
Guided portions 72 and 73 are provided, respectively.
On the lower surface of the guided portion 73 of the section,
For the guide into which the guide pin 74 planted in the
A pin groove 75 is formed. This pin groove 75 is
When the table 46 is inserted into or pulled out of the printer
Then, the accommodating pedestal 46 is released in a direction away from the photosensitive drum 1.
When the insertion is completed, it is relatively close to the photosensitive drum 1.
So that the developing unit 40 can be guided to the predetermined location.
In addition, only the predetermined part on the front side is
It is bent from the middle so that it is better than Drum 1
ing. The support mechanism of the developing unit 40 described above
That is, when the housing 46 is inserted into the main body,
The tapered tip of the positioning pin 63b is
Immediately before the insertion of the accommodation table into the
When it enters the positioning hole 63a and the insertion is completed,
Attach the rear support plate 55 and the bracket 63 to the
Position accurately in the body. Also, withdrawal of the accommodation table 46
In this state, the development supported by the rear plate 53 of the accommodation table 46 is performed.
The rear end of the vessel unit 40 is
Immediately before the insertion, the tapered center shaft 52 is inserted into the center shaft.
Lift up as you gradually enter the hole 54
At the time of completion of the insertion, it is completely lifted from the rear support plate 55.
Go up. The front support plate 48 of the housing table 46 is
After the insertion of the main body 6 into the main body, the main body front side plate 6
It is fixed to 8. As a result, the developing device unit 40
Support of the front support plate 48 accurately positioned on the main body
The front end is supported by rollers 49 and
The rear end portion is pivotally positioned on the main body rear side plate 53,
It becomes pivotable. Further, the holding table 46 is pulled toward the near side of the apparatus main body.
In the protruding state, the support rollers 49 of the support plate 48 in front of the accommodation table are used.
The front end wall 50 of the developing unit 40 is rotatably supported,
Further, the rear end of the developing unit 40 is supported by the rear support plate 55.
The wall 51 is rotatably supported, and the developing unit 40 is rotated.
Since it can be held rotatably, it can be
Of developer for each developing unit while rotating
Replacement work can be performed satisfactorily in this state.
You. In this state, the developing device unit 40 in the pulled-out state is
To enable smoother rotation,
The support plate 55 is also supported using the same support rollers as the front side.
You may make it. The developing unit 40 is driven to rotate.
A stepping pin (not shown) is provided on the rear plate 53 of the main body.
Driven by a revolver rotation motor,
Revolver drive gear is mounted. This is the developer unit
Knit 40 fixed to the back of the rear end plate with screws
Meshes with a revolver input gear having substantially the same diameter as the rear end plate 51
The developing unit 40 is rotationally driven.
You. Next, referring to FIGS.
The zero body will be described. Referring to FIG.
The knit 40 is made of the above-mentioned substantially disk-shaped front and rear end plates 50 and 51.
It has a partition wall provided between them. This partition wall
A cylindrical black toner bottle containing black toner can be inserted
Hollow cylindrical portion 82 and radially extending from the hollow cylindrical portion 82.
The space around the hollow cylindrical portion 82 in the circumferential direction.
Developing device casing section divided into four developing chambers of almost the same type
83, 83C, 83M, and 83Y. the above
Each developing chamber contains a carrier as a developer and a toner of each color.
And a two-component developer comprising a toner. Illustrated example
In the development position facing the photosensitive drum
In the developing room of the black developing unit containing black toner and carrier,
Contains yellow toner and carrier in counterclockwise order
Yellow magenta toner
Developing chamber of a magenta developing device containing cyan toner
It is the developing room of the cyan developing unit containing the carrier
You. The internal structure of each of the above four developing chambers is completely
The same applies to the developing position in FIG.
The internal structure is explained using a black developing room as an example,
Regarding the internal structure of the chamber,
The same number as the code in the developing room is yellow, magenta,
Subscripts of Y, M, and C are added to distinguish cyan developing chambers.
The reference numerals are shown in the figure, and the description is omitted. In the drawing, a black developing device is located at a developing position.
To the photosensitive drum 1
Opening is formed, and a part is exposed through the opening.
As described above, the developing roller 84 is provided in the developing chamber. Ma
In the developing chamber, the photosensitive drum supported by the developing roller 84 is provided.
Doctor that regulates the amount of developer conveyed to a portion facing the system 1
Blade 85, regulated by doctor blade 85 for development
Part of the developer pressed into the room is
The upper transport screw 86 that transports forward and backward
Pad 87 for stirring the developer in the developing chamber
A screw 88 is provided. This stirring paddle 88 is used for developing
A plurality of developer discharge holes 89a over the width direction of the roller 84;
A hollow cylindrical portion 89 in which is formed a peripheral portion of the hollow cylindrical portion 89.
A plurality of stirring plate portions 90 extending radially from the surface.
In the hollow cylindrical portion 89, the above-mentioned carrying is carried out along the central axis direction.
Lower transport that transports the developer in the opposite direction to the feed screw 86
The feeding screw 91 is accommodated. This lower transfer screen
In the developing device casing below the window 91,
When the developer is replaced due to development deterioration, the deteriorated developer
Used as an inlet for used developer (toner mixed)
An agent exchange port 92 is formed. This agent change port 92
From the outside by a cap 93 attached with a spike 94
Covered. In FIG. 4, the upper and lower conveying screws 8
6, 91 are formed on the front end wall 50 of the developing unit.
It extends to the outside, and the upper transfer screw 86
The developer transported by the
A drop section 96 for dropping by weight is provided. this
It is regulated by the doctor blade 85 through the drop section 96.
And transported to the front side by the guide 87 and the upper transport screw 86
The fed developer falls onto the lower conveying screw 91, and the
The lower conveying screw 91 conveys the developing roller 84 within the effective width.
The developer outlet of the hollow cylindrical part of the stirring paddle after being sent
From the developing chamber. As a result, the current
The so-called lateral stirring of the image agent is performed. Furthermore, the above-mentioned stirring paddle
88 from the developer outlet of the hollow cylindrical portion 89 to the lower part of the developing chamber.
The developer discharged into the developer reservoir rotates the stirring paddle 88.
Vertical stirring by the stirring plate
Done. Also, the front end of the lower transfer screw 91
Is a toner container that extends further forward than the drop section 96.
Each toner provided corresponding to each developing chamber of the unit 45
-Inside the receiving case 91Y, M, C, 110, concrete
Specifically, the toner supply roller 97 provided in the case
It extends down. In the example shown in FIG. 3, for example, a yellow developing device
As shown in FIG.
The front and rear end wall portions for supporting the front and rear ends 85Y
The small end wall 104 is configured to be separable from the small end wall 104. this
When cleaning the inside of the developing chamber or replacing parts, the small end wall
104 and developing roller 84Y and doctor blade 85Y
To make it easier to access the developing chamber
I have. Next, referring again to FIG.
The unit unit 45 will be described. The toner container
The knit 45 includes a disc-shaped unit face plate 108 and
Attached to the front of the face plate so as to correspond to
A total of four toner receiving cases 91Y, M, C,
110. The unit face plate 108 has a cylindrical shape.
Not shown can penetrate the black toner container
A through-hole is formed at the center of the through-hole, and each of the toner receiving
The storage cases 91Y, 91M, 110C and 110 escape this through hole.
Is attached. These four toner receiving cases 91
Of Y, M, C, 110, corresponding to each color developing device
The three color toner receiving cases 91Y, M, and C include:
When the corresponding developing chamber is located at the developing position,
Is formed. And this
Color toner in the mounting area around the toner receiving port
Color toner containers 42, 43, 4 of the same shape for each color
4 is revolved with its toner outlet facing down.
The developing unit is attached by sliding in the direction of the rotation axis.
Have been. On the other hand, for receiving black toner corresponding to a black developing device
The case 110 is the case 91 for receiving the color toner.
The color toner containers 42, 43, and 44 are attached to Y, M, and C, respectively.
The shape of the peripheral wall is almost the same as the overall peripheral wall shape
It has a wall shape. And a case for receiving color toner
Of the revolver developing unit on the peripheral wall
At the portion facing the center line, the toner is discharged from the black toner container 41.
A toner receiving port with a shape corresponding to the outlet is formed.
You. The black toner container 41 has a cylindrical shape.
A toner outlet is formed in the peripheral wall at one end in the longitudinal direction.
A ridge for toner feeding is provided on the inner peripheral surface from the other end.
It is formed spirally toward the toner outlet. this
Attached to the revolver developing unit with a spiral ridge
During rotation of the unit with the unit in the
Feeds the stored toner toward the front end from the
In the toner receiving port of the black toner receiving case
The toner is supplied. Such black toner
The container 41 holds the toner collected on the cover 47 described above.
The rear end of the notch 47a extends through the center of the notch 47a.
Penetrates halfway within the hollow cylindrical portion 82 of the imager unit 40
And the tip is, for example, the toner container unit 45 described above.
Until it is almost flush with the front of the front end wall of each case.
Installed in the inserted state. FIG. 4 shows a black toner receiving case 11.
As shown by taking 0 as an example, the above four toner receiving
For each of the cases 91Y, M, C, 110,
A toner supply roller 97 is provided. This toner supplement
The supply roller 97 is set so that the corresponding developing chamber is in the developing position.
When placing the lower transfer screw 9 into the case,
The front end of the case so as to be located almost directly above the one extending portion.
It is pivotally supported by the wall and the unit face plate 108. This
Of the toner replenishing roller 97 supported by the knit face plate 108
The shaft end penetrates through the face plate 108 and the developing unit 40
Gear 197 is fixed to the protruding end.
You. Then, a drive (not shown) meshing with the gear 197 is omitted.
The replenishment input gear for dynamic input is
It is rotatably provided on the surface of the image unit. this
Of a supply input gear provided for each toner supply roller 97.
Of which, the case corresponding to the developing device in the developing position
The toner supply roller 97 corresponding to
Gears (see FIG. 2) driven by the motor 61
And can be driven to rotate by the motor 61
I have. The rotation of the toner supply roller 97 causes the lower conveyance screen to rotate.
The toner that has fallen on the window 91
It is taken into the developer dropped from c 86 and mixed with each other
While being transported into the developing chamber by the lower transport screw 91.
To increase the toner concentration of the developer in the developing chamber.
The toner supply control is performed by controlling the rotation of the toner supply roller 97.
Is performed. The rotation employed in the present embodiment is
In a developing device of the type, the developer floating in the developing unit
Can be partially exposed from the developer case opening, for example.
And develop in a predetermined direction in the area facing the photosensitive drum 1
Developing agent for transporting the developer and supplying the developer to the photosensitive drum 1
Adheres or accumulates on the developing device wall above the roller 84
Resulting in. The developer is supplied to the developing unit 4
Due to shocks or vibrations that occur with rotation of
The developer drops as a lump on the developer supply member, and
Is discharged outside the developing unit due to centrifugal force caused by the rotation of the
Sometimes. In addition, it is emitted when the developing unit 40 rotates.
The magnetic force on the developing roller 84 is
The magnetic developer emerges from the weak area through the developer case opening.
It may be ejected out of the imager. In particular, this embodiment
In the state, there is a transfer material for transferring the developed image of the photosensitive drum 1.
Transfer paper 10 on which the developed image has been transferred
The conveyor belt 15 is provided so as to convey it below
Therefore, the developer mass discharged out of the developing device is
5 and the developer mass adheres to the transfer material
In this case, a developer-falling image is generated. In addition, this embodiment
Forms images using different colors of developer
Therefore, a color different from the color of the image formed on the transfer material
When the developer drops and adheres to the transfer material, a mixed color image is generated.
Lead to life. FIG. 5 is a diagram for preventing the developer from scattering outside the developing device.
FIG. 4 is an explanatory diagram showing a configuration for performing the above. In the example shown,
The developing unit below the developing unit opening of the roller type developing device 4
Developer receiving portion made of a rigid body so as to cover
The toner receiving member 330 as a material is
It is fixed with fixing screw 360 so that it can be detached from
I have. The provision of the toner receiving member 330
From the opening of the developing device toward the conveyor belt 15.
Even if the toner falls, the toner
15 is provided on the accommodation table 46 before reaching
-The developing device is received by the receiving member 330.
Reaching onto the transfer paper 10 conveyed below the opening
To prevent the transfer paper 10 from being contaminated by falling toner.
be able to. The rotary developing device 4 of the present embodiment is
It is configured to be detachable from the linter body together with the accommodation table 46.
And a drum support 35 supporting the photosensitive drum 1
There is a slight gap between the toner receiving member 330 and the toner receiving member 330.
Therefore, the sponge seal as a sealing member to close this gap
340 in the entire longitudinal direction on the toner receiving member 330 side.
They are located throughout. And this sponge seal 3
40, the drum support 350 and the toner receiving member 330
By dropping from the opening of the developing unit
The dropped toner falls onto the transfer paper 10 through this gap.
Can also be prevented. The side cover 59 described with reference to FIG.
It is arranged on the outer periphery of the developing unit 40,
The cover 59 is positioned at a distance when the developing unit 40 rotates.
Splashes out of the developing unit through the opening of the developing unit case
Receiving the toner, and moving toward the toner receiving member 330 located below.
And guide them to move. Note that this side cover
The surface facing the developing unit 40 of the
Sheet 370 is attached to this magnet sheet.
Carrier 370 scattered from the developing device by the magnetic force of
The minute portion can be caught by the side cover 59. this
Therefore, for example, the scattered carriers are attached to the inside of the image forming apparatus.
To the inside of the device due to wearing and the drive system such as gears.
The generation of abnormal noise due to adhesion can be prevented.
You. The toner receiving member 330 is made of a rigid body.
So that the accommodation table 46 is
It is not twisted by its own weight and the face plate does not bend.
The developing gap between the developing roller 84 and the photosensitive drum 1
Can be accurately maintained. Next, replacement of the developer in the developing device will be described.
Will be explained. The replacement of the developer in the present embodiment is described above.
To efficiently discharge the deteriorated developer from the exchange port 92 of the
The revolver developing unit 40 together with the
In the state of being pulled out from the
Do. First, close the replacement port 92 without spilling the developer.
Housing the developing unit 40 to remove the lid
As shown in FIG. 7, the table 46 (see FIG. 2) is
Flip over so that the replacement port 92 of the elephant developing device faces upward
You. Then, at this overturned position, remove the screw 94 and remove the replacement port.
Remove the lid 93 closing the 92
The jaw indicated by reference numeral 200 is not shown by using a slot.
By screwing the joining plate, as shown in the figure,
The jaw 200 is attached to the developing device. And on
The storage table 46 is turned over again to return to the state shown in FIG.
In the first rotation position,
The collection container indicated by reference numeral 210 is
Combine. Next, the toner receiving member 330
Remove the fixing screw 360 fixed to 46, and remove the toner
The mounting member 330 is removed from the accommodation table 46. And this
After the joining, the rollers 66 are released and the developing unit 4
0 is the second rotational position in which the exchange port 92 of the developing unit is directed downward.
So that it comes to the developer collecting position shown in FIG.
Rotate clockwise. At this time, the collection container 2
Reference numeral 10 denotes a rotation for stopping the rotation of the developing unit 40.
It is also used as a stop member. That is, the collection container
Numeral 210 indicates the rotational movement of the developing unit 40,
Move in the direction of rotation. Then, the replacement port 9 of the developing device
2 comes to a position directly below, the collection container 210
As shown in FIG. 9, a part 210P of the
6 and contacts the portion 46P of the developing device unit 40 to rotate the developing device unit 40.
Stop rolling. Thereby, the developing unit 40
Stops at the developer collecting position where the rotation is good.
Then, at the developer collecting position having the best collecting property, the developing device
From the developer. Here, the collecting container 210 is shown in FIG.
In order to take the position, the side cover 59 shown in FIG.
In the figure, a notch portion 59a in which a portion shown by oblique lines is cut is formed.
Has been established. Also, during normal development operation, this notch
Toner does not fall onto the lower transfer paper 10 from the contacting portion 59a.
So as to cover the lower portion of the side cover 59.
-The receiving member 330 is attached. And this
The toner receiving member 330 is received by the fixing screw 360.
When the developer is fixed to the container 46 and the developer is replaced
Then, the fixing screw 360 is removed to remove the toner receiving member 33.
0 by removing it from the accommodation table 46,
The container 210 can take the position shown in FIG.
By doing so, during the developing operation,
The toner is transferred onto the transfer paper 10 by the toner receiving member 330.
It can be prevented from dropping and can be used during developer replacement work.
Cleans the toner dropped on the toner receiving member 330
And the best recoverability from the developing unit
The developer can be collected at the developer collection position. At the developer recovery position, the current
As shown by an arrow 202 in FIG.
And inside the collection container 210 via the jogo 200
To be collected. This collection replaces the developer in the developing unit with its own weight
Flow down through the mouth 92 (see the arrow indicated by 202 in the figure)
It is done by doing. At the time of recovery, a magnetic field is placed on the developing sleeve.
The developer held by the force is released from above the developing sleeve.
The development input gear with a jig or hand.
Rotate using the developing roller 84, upper and lower transport screw
Rotate 86, 91 and paddle 88. In the example shown in FIG.
The transfer of the developer to the collection container 210 is performed by using the developer shown in FIG.
Rotational transfer from the charging position to the developer collecting position shown in FIG.
It is starting in motion. The recovery of the developer into the recovery container 210 is performed.
After the completion, the developing unit 40 is rotated counterclockwise.
Rotate to return to the first rotation position shown in FIG.
In this state, the collection container 210 is
Ride and remove. Thereafter, the accommodation table 46 is moved to the position shown in FIG.
And turn it over so that the replacement port 92 of the developing unit faces upward.
Then, as shown by the arrow 203 in the drawing,
It is put into the developing device via the jaw 200. This new
When the developer is supplied, the developing roller 84 is moved up and down.
Rotate the feed screws 86 and 91 and the stirring paddle 88
Then, the developer can be uniformly dispersed. And
After the charging of the developer is completed, the jaw
The go 200 is removed and the exchange port 92 is closed with the lid 93.
Then, the accommodating table 46 is pushed into the printer body, and
Set in place. This completes the developer replacement work.
Complete. [0041] According to the first aspect of the present invention, a developer supply section is provided.
Discharged from the development area where the material and the latent image carrier
Developer below the developing unit below the developing area.
Falling toward the transfer path of the transfer material transfer device
The developer is received by the time the developer reaches the transport path.
The developer that has fallen,
The latent when falling on the transport path and being transported along the transport path.
The transfer material for transferring the developed image on the image carrier is stained or
Is attached to the transfer material on which the developed image has been transferred and
Excellent effect of preventing the generation of images
There is fruit. Further, for example, each of the developing devices is different from each other.
Color developer, the transfer material
The developer of a color different from the color of the formed image falls and
Prevent the generation of mixed color images due to adhesion to the copying material.
There is an advantage that can be.Also, during development operation,
Use the device with the above-mentioned developer receiving member attached.
By doing so, the developer receiving member allows the developer to be transferred onto the transfer material.
It is possible to prevent the developer from falling. Also, developer exchange
During replacement work, remove the developer receiving member.
With this, the toner accumulated in the developer receiving member can be easily removed.
Can be cleaned and most recovered from the developing unit
The developer can be collected at a good developer collection position.
You.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram of a copying machine according to an embodiment. FIG. 2 is an exploded perspective view of a rotary developing device of the copying machine. FIG. 3 is a sectional view of a developing unit of the developing device. FIG. 4 is an explanatory diagram of a communication structure between a developing device and a toner container in the developing device. FIG. 5 is an explanatory diagram showing an attached state of a toner receiving member for preventing a developer from dropping onto transfer paper. FIG. 6 is an explanatory diagram of a developer replacement operation in the developing device according to the embodiment. FIG. 7 is an explanatory diagram of the developer replacement operation. FIG. 8 is an explanatory diagram of the developer replacement operation. FIG. 9 is an explanatory diagram of the developer replacement operation. DESCRIPTION OF REFERENCE NUMERALS 1 photoconductor drum 4 rotary developing device 40 developing unit 41 black toner container 59 side cover 83, 83C, 83M, 83Y developing unit casing 84 developing roller 200 jaw 210 collection container 330 toner receiving member 340 Sponge seal 350 Drum support 360 Screw for fixing 370 Magnet sheet

Claims (1)

(57) Claims 1. A developing unit having a latent image carrier on which a latent image is formed, and a plurality of developing units disposed around a rotation center line, is provided with a rotation center line. Rotating the developing device around the latent image carrier to develop a latent image on the latent image carrier by moving each developing device to a developing position facing the latent image carrier; the transfer material to transfer the transfer material or the developing image is transferred, in an image forming apparatus having a transfer material conveying device for conveying beneath the developing unit, the developing unit in the developing position, the latent image bearing developer supply member is partially exposed from the developing device case opening to supply the developer to the body, from the region facing the latent image carrier, the transfer material conveyance that exist below the developing unit Developing to receive developer falling toward the transport path of the device And receiving member, a developer unit for rotatably supporting the developing unit
A support for the developing device unit, and at a predetermined first rotational position on the support for the developing unit.
The developer is collected at the opening for collecting the developer contained in the developing unit.
A developing device having a container attached thereto and the developer collecting container attached thereto.
Is a predetermined second rotational position on the developing unit support.
To the developer collection container through the opening.
The developing device is configured to be able to collect an image agent, and the developing device moves from the first rotation position to the second rotation position.
The path along which the developer collection container moves during unit rotation
Removably mounts the developer receiving member at the overlapping position
Image forming apparatus characterized by digit.