JP2003021960A - Rotary type developing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of a splattered image due to excessive rise of temperature within a developing chamber by providing a hollow part communicating with the outside in a central part of a developing device unit which is provided with a plurality of developing devices and can be rotated. SOLUTION: In the device, developing device casing parts 83, 83C, 83M and 83Y are formed extending radially from an outer periphery of the central hollow cylindrical part 82 where the hollow inner part communicates with the outside at a front end wall of the developing device unit. Thus, the hollow cylindrical part 82 can be used as a part of the peripheral wall of the developing chamber and heat exchange between the air outside the developing chamber and the developing chamber can be carried out through the peripheral wall part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary developing device applied to an image forming apparatus such as a copying machine, a facsimile, a printer, and more specifically, a plurality of developing devices arranged around a rotation center line. The present invention relates to a rotary developing device that rotates a developing device unit that is provided around the rotation center line to move an arbitrary developing device to a developing position facing a latent image carrier to perform development.

[0002]

2. Description of the Related Art Conventionally, as a rotary developing device of this type, for example, Japanese Utility Model Publication No. 4-32680 discloses a developing unit in which three developing devices are incorporated and rotatably supported in the device. The developer chamber of the container, the three partition walls of the casing member made of non-magnetic material such as aluminum,
It is disclosed that it is divided by two end walls fixed to both ends thereof.

[0003]

SUMMARY OF THE INVENTION However, the present inventors have found that in such a rotary type developing device, an undesired firefly image in which an annular white spot occurs in the image has a usual single developing device. We have discovered a problem that occurs more frequently than in image forming apparatuses. Here, the white spot refers to a phenomenon that the background color of the transfer paper is visible without the toner adhering to the portion where the toner should originally adhere. Also, in this firefly image, due to some reason, a lump of toner is present in the developing device,
After this toner lump adheres to the surface of the latent image carrier by development, when it is transferred to the transfer paper in the transfer step, it interferes with the adhesion between the latent image carrier surface and the transfer paper surface in the peripheral portion of this toner lump. As a result, the toner in the peripheral portion is not transferred to the transfer paper side.

Therefore, the inventors of the present invention have made extensive observations and studies on the cause of this problem, and have found the following. That is, inside this type of image forming apparatus, the rotary developing device that takes up a relatively large space must be at least partially arranged near a heat generating device such as a fixing device. For this reason, the temperature inside the developing device becomes higher than that in a normal image forming device, and the toner is likely to be softened in the sliding portion such as the bearing portion. And
It has been found that the softened toner is solidified into the toner mass, which causes the firefly image. In particular, as disclosed concretely in Japanese Utility Model Publication No. 4-32680, when a partition wall radially extending from a relatively small-diameter rotating shaft portion constitutes a common casing wall between adjacent developing devices. It was also found that since the partition wall could not come into contact with the outside air at all, heat was likely to be trapped inside the developing device, and the above-mentioned problems were likely to occur.

Therefore, a first object of the present invention is to provide an image forming apparatus capable of suppressing the temperature rise in a plurality of developing devices of a rotary developing device and reducing the occurrence of the firefly image. .

Further, in such a rotary type developing device, since a plurality of developing devices are incorporated in the rotating developing unit, when replacing the developer due to deterioration of the developer, a single developing device is used. Compared to the above-mentioned developer replacement, the replacement work is complicated and the developer is likely to be spilled to the surroundings at the time of replacement.

In view of this, in Japanese Patent Laid-Open No. 61-200558, a developing device is provided with a developing position opposite to the developing object for visualizing an electrostatic latent image on the developing object, and a developing device inside the developing device. It is configured to be movable between a recovery position for recovering the deteriorated developer and a recovery position away from the developer, and the development device is moved from the development position to the recovery position, and the deteriorated development is performed from the development device. An image forming apparatus has been proposed in which the agent is collected by utilizing gravity.

However, in the image forming apparatus according to the above proposal, no consideration has been given to the structure because a new developer is added after the developer is collected. Further, since the developing opening formed in the developing device casing for exposing a part of the developing sleeve as the developer carrying member is used as the developer collecting port, there is a problem that it takes time to collect. It is left.

Therefore, a second object of the present invention is to provide a rotary developing device capable of improving the workability of developer exchange as compared with the conventional one.

[0010]

In order to achieve the above first object, a rotary developing device according to a first aspect of the present invention includes a developing device unit having a plurality of developing devices arranged around a rotation center line, In a rotary developing device that rotates around the rotation center line to move an arbitrary developing device to a development position facing the latent image carrier to perform development, a hollow portion having a hollow portion around the center line that communicates with the outside. A member is provided, and a partition wall radially extending from the peripheral wall of the hollow member constitutes a common casing wall between adjacent developing devices in the plurality of developing devices, and the hollow member and the partition wall have good thermal conductivity. It is characterized by being formed of various materials.

In order to achieve the above-mentioned second object, a rotary developing device according to a second aspect of the present invention includes a developing device unit having a plurality of developing devices arranged around a rotation center line. In a rotary developing device that rotates by rotating the developing device to the developing position facing the latent image carrier to perform development, an exchange port for replacing the developer stored inside each of the developing devices. And each developing device can selectively take a developer collecting position in which the exchange port faces downward and a developer input position in which the exchange port faces upward. In addition, it is characterized by being configured to be rotatable.

A rotary developing device according to a third aspect of the present invention is characterized in that, in the rotary developing device according to the second aspect, the structure near the exchange port is configured such that a jogo member can be attached and detached.

A rotary developing device according to a fourth aspect of the present invention is the rotary developing device according to the second aspect, wherein the exchange port is part of a developer carrying member for supplying the developer to the latent image carrying member. It is characterized in that it is provided separately from the opening formed in each developing device for exposing.

According to a fifth aspect of the present invention, there is provided the rotary developing device of the third aspect, wherein the jogo member is
It is characterized in that it is provided with a recovery container having an opening connectable to the opening.

A rotary developing device according to a sixth aspect of the present invention is characterized in that, in the rotary developing device according to the fifth aspect, the jogo member and the recovery container can be connected to each other by a slide. is there.

According to a seventh aspect of the present invention, there is provided the rotary developing device according to the sixth aspect, wherein at least one of the jogo member and the recovery container is an appropriate one of the jogo member and the recovery container. The present invention is characterized in that a regulating member for regulating the sliding of the jogo member and the recovery container beyond the positional relationship is provided.

According to an eighth aspect of the present invention, there is provided the rotary developing device according to the fifth, sixth or seventh aspect, wherein the recovery container portion is separated from the opening of the recovery container in the circumferential direction of the developing device unit. Further, a developer collecting portion is formed in which the developer collected from the opening is accumulated as the developer unit rotates from the developer collecting position.

According to a ninth aspect of the present invention, there is provided the rotary developing device according to the fifth, sixth, seventh or eighth aspect, wherein the recovery container has an indicator portion corresponding to the total amount of the developer to be recovered. It is characterized by being provided.

A rotary developing device according to a tenth aspect of the present invention is the rotary developing device according to the fifth, sixth, seventh, eighth or ninth aspect.
In the sliding portion between the jogo member and the recovery member,
An elastic seal member having a surface having a relatively small friction coefficient is provided on at least one of the surfaces of the jogo member and the recovery member such that the surface is a sliding surface with the other surface. Is to be

According to a tenth aspect of the present invention, in the rotary type developing device of the tenth aspect, the edge of the joint surface, which is covered with the elastic seal member, on the upstream side in the sliding direction is also the edge. It is characterized in that it is provided so as to cover it.

A rotary developing device according to a twelfth aspect of the present invention is the rotary type developing device according to any one of the first to third aspects.
In the first rotary developing device, a knob is provided on a rotating body included in a drive system for driving the developer carrying body for supplying the developer to the latent image carrying body.

A rotary developing device according to a thirteenth aspect is the rotary developing device according to the fifth, sixth, seventh, eighth, ninth, tenth, eleventh or twelfth aspect, wherein the recovery container is rotated by the developing device unit. It is used as a rotation stopping member for stopping.

[0023]

In the rotary developing device according to the first aspect of the present invention, since the partition wall radially extending from the peripheral wall of the hollow member provided around the center line constitutes a common casing wall between adjacent developing devices, the hollow member is provided. The peripheral wall constitutes a so-called casing bottom wall portion facing the center lines of the plurality of developing devices. The inside of the hollow member communicates with the outside, that is, the outside of the rotary developing device, and since the hollow member itself is formed of a material having good thermal conductivity, at least this casing is provided inside each developing device. It becomes possible to exchange heat with the outside air via the bottom wall portion. In addition, since not only the hollow member but also the partition wall is formed of a material having good thermal conductivity, when a specific developing device is located in the vicinity of a device that generates heat such as a fixing device, the state is continued. Also,
Through the hollow member and the partition wall, heat can be released from the specific developing device to the other developing device side, and a local temperature rise of only the specific developing device can be prevented.

According to another aspect of the present invention, in the rotary developing device, the developing device for exchanging the developer is rotationally moved to the developer collecting position where the exchange port faces downward, and the internal weight of the developer is utilized. The developer is caused to flow out from the exchange port. After that, the replacement port of the developing device is rotationally moved to a developer loading position in which the replacement port faces upward, and new developer is loaded into the inside through the replacement port.

Particularly, in the rotary developing device according to the third aspect, the developer is collected or charged in the developer collecting position or the developer charging position with the jawgo attached to the exchange port.

Further, in particular, in the rotary developing device according to the fourth aspect, the developer is transferred through an exchange port provided separately from the opening formed in each developing device for exposing a part of the developer carrying member. Collect and input.

Particularly, in the rotary developing device according to the fifth aspect, the recovery container has an opening connectable to the opening of the jogo member, and the opening of the jogo member is sealed by the recovery container. The developer does not scatter when the developer is charged or collected.

Particularly, in the rotary developing device according to the sixth aspect, since the recovery container is slidably connected to the jogo member, the recovery container can be easily attached and detached.

Particularly, in the rotary developing device according to the seventh aspect, the recovery container is slid until the restraining member provided on at least one of the jogo member and the recovery container comes into contact with the jogo member. Thus, the mutual positional relationship becomes appropriate.

Particularly, in the rotary developing device according to the eighth aspect, the collected developer is accumulated in the developer accumulating portion in the collecting container.

Particularly, in the rotary developing device according to the ninth aspect, since the total amount of the developer to be collected and collected is indicated by the indicator portion provided in the collecting container, the amount of the developer remaining without being collected is shown. It is a guide for estimating the amount. That is, when collecting the developer, the worker rotates the developing input gear by using a jig or a hand to collect the developer held by the magnetic force on the developing sleeve, and the developing roller or the vertical transport screw. Rotate etc. At this time, the operator cannot usually know whether or not all the developer has been collected, but by marking the collection container with the amount of the developer that was previously charged, it is possible to reach near that mark. If the developer is collected, it can be known that the collection is almost completed. This prevents the operator from rotating the development input gear more than necessary.

In particular, in the rotary developing device according to the tenth aspect, since the elastic member is provided on the sliding surface of the jogo member and the recovery container, there is no gap, and the developer is collected at the time of collecting and charging the developer. Will not be leaked. Further, since the jogo member moves while coming into contact with the low friction coefficient material, it is easy to attach and detach the recovery container.

Particularly, in the rotary developing device according to the eleventh aspect, the edge on the upstream side in the sliding direction of the joint surface covered with the elastic seal member is also sealed by the elastic seal member. Therefore, at the time of joining the jogo member and the collection container, the collection container is joined to the jogo member without the elastic seal member flipping up from the one edge and peeling off.

Particularly, in the rotary developing device according to the twelfth aspect, when the rotating body with the knob is rotated, the developer carrying body is driven together with the rotating body included in the drive system.

Particularly, in the rotary developing device according to the thirteenth aspect, when the developer is collected, the developing unit is stopped at the developer collecting position where the rotation is good by the collecting container.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is applied to a color electrophotographic printer (hereinafter referred to as a printer) which is an image forming apparatus will be described below. FIG. 1 is a schematic configuration diagram of a printer according to this embodiment. First, an outline of the entire printer will be described. In FIG. 1, a photosensitive drum 1 serving as a latent image carrier is uniformly driven by a charging charger 2 serving as uniform charging means while being rotationally driven in the direction of arrow A, and then image information is generated by a laser optical device 3. Scanning exposure is performed on the basis of the above to form an electrostatic latent image on the surface.
Here, the image information to be exposed is image information of a single color obtained by separating a desired full-color image into color information of yellow, magenta, cyan, and black. The electrostatic latent image formed on the photoconductor drum 1 is developed by a rotary developing device 4 described later with yellow, magenta, cyan, and black toners as predetermined developers, respectively, and thus, on the photoconductor drum 1. An image of each color is formed on.

Each color image formed on the photoconductor drum 1 is formed on the intermediate transfer belt 5 which rotates in the direction of arrow B in the figure in synchronization with the photoconductor drum 1 for each color of yellow, magenta, cyan and black. The primary transfer charger 6 sequentially performs the superimposed transfer. The yellow, magenta, cyan, and black images superposed on the intermediate transfer belt 5 are transferred from the automatic paper feed cassette 7 for double-sided copying or the manual paper feed tray 7a through the paper feed rollers 8 and 8a and the registration rollers 9. The secondary transfer charger 11 collectively transfers the transferred sheet 10 onto the transfer sheet 10. After the transfer is completed, the toner image is fixed on the transfer paper 10 by the fixing device 12, and the transfer paper 10 is discharged outside the machine as a full-color print.

The toner on the photoconductor drum 1 which has not been transferred onto the intermediate transfer belt 5 is removed by the photoconductor 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 the
It is removed from the intermediate transfer belt 5 by the intermediate transfer belt cleaner 14.

Next, the rotary developing device according to the embodiment will be described. 2 is an exploded perspective view of the developing device, FIG. 3 is a cross-sectional view showing the internal structure of the developing device unit 40 of the developing device, and FIG. 4 is the above-described upper and lower conveying screws 86, 9 of the black developing device.
1 is a longitudinal sectional view taken along a plane including the central axis 52 of FIG.
6 (b) and 6 (c) are perspective views from the front showing the drive system of the developing unit 40, FIG. 6 (a) is an explanatory view of the developer replacement work, and FIG. 6 (b) is used for the replacement work. It is a perspective view of Joego. In FIG. 2, the rotary developing device has, for example, a developing device for each of four colors of black, cyan, yellow, and magenta formed therein, and has a substantially cylindrical outer periphery that is attached rotatably around the central axis in the printer body. And a four-toner container 41, 42, 43, 44 which respectively correspond to each developing device in a one-to-one correspondence and which respectively store toners of black, yellow, magenta, and cyan,
Further, a toner container unit 45 that is attached so as to be substantially coaxial with the developing device unit 40 on the front side in the direction of the central axis thereof and that rotates integrally with the developing device unit 40 around the central axis, and these developing device units. 40 and a toner container unit 45 (hereinafter referred to as a revolver developing unit), a container 46 slidable on the printer main body substantially parallel to the central axis, and a container so as to cover the toner container unit 45. The front support plate 48 is provided with a cover 47 that is non-rotatably provided.

The revolver developing unit is provided with a receiving table 46.
The disk-shaped front end wall 5 of the developing device unit 40 includes, for example, two supporting rollers 49 rotatably attached to the front supporting plate 48 of the developing device unit 40.
0, and a central axis 52 of the tip end taper protruding from the center of the disk-shaped rear end wall 51 of the developing device unit 40.
Is rotatably supported by a central shaft insertion hole 54 formed in the rear plate 53 of the main body, so that the rotation axis of the printer main body is substantially the same as the rotation axis of the photosensitive drum 1 as shown in FIG. They are positioned so as to be parallel to each other in the same horizontal plane and are rotatable.

First, the mechanism for rotatably supporting the revolver developing unit in this manner will be described with reference to FIG. In FIG. 2, the accommodation base 46 is the front support plate 4
8, a rear support plate 55, and a side cover 59 having front and rear end portions fixed to both support plates and reinforced by connecting rods 56, 57, and 58. An insertion hole 60 into which the revolver developing unit can be inserted is formed in the front support plate 48,
In addition to the support roller 49, a toner replenishing roller driving motor 61 provided in the toner container unit 45.
And a gear train driven by the motor 61 is attached. Further, the connecting rods 56, 5 near the rear support plate 55
An intermediate plate 63 is attached to the seventh portion, and a positioning pin 63b that fits into a positioning hole 63a formed in the rear plate of the main body is provided on the intermediate plate 63 so as to project. A base end portion of a bracket 64 holding a rotary positioning roller 66 is swingably attached to a positioning pin portion between the middle plate 63 and the rear support plate 55. Then, the bracket 64 fits the rollers 66 into the recesses 65 formed at predetermined locations (a total of four locations corresponding to the four developing devices in this embodiment) of the peripheral surface portion of the developing device unit rear end wall 51. It is biased in the direction by a spring 67 (see also FIG. 5A).

The front plate 68 of the main body is formed with an insertion hole 69 or the like into which the storage base 46 carrying the revolver developing unit can be inserted, and between the front plate 68 of the main body and the rear plate 53 of the main body. Upper and lower guides 70, 71 for slidably supporting the storage base 46 are hung. Guided portions 72 and 73 are provided at the upper end and side portions of the side cover 59 of the accommodation table, respectively, as guided portion portions guided by these guides 70 and 71. On the lower surface portion, a guide pin groove 75 into which the guide pin 74 planted upward in the guide 71 is inserted is formed. The pin groove 75 allows the accommodation base 46 to escape in the direction of separating from the photoconductor drum 1 at the time of inserting or withdrawing the accommodation base 46 into the printer main body, and at a predetermined position relatively close to the photoconductor drum 1 when the insertion is completed. In order that the revolver developing unit can be guided, only a predetermined portion on the front side is bent from the middle so that it is closer to the photosensitive drum 1 than the rear portion.

In the support mechanism of the revolver developing unit described above, when the storage stand 46 is inserted into the main body, the tapered tip end of the positioning pin 63b projecting from the intermediate plate 63 immediately before the completion of insertion of the storage stand into the printer main body. To the rear plate 53 of the main body
When the insertion is completed, the rear support plate 55 of the receiving stand 46 and the bracket 63 are inserted into the positioning hole 63a.
Accurately position in the body. Further, in the pulled-out state of the storage table 46, the rear end portion of the revolver developing unit supported by the rear side plate 53 of the storage table 46 has the tapered central axis 52 from the center just before the completion of insertion of the main body of the storage table 46. It is lifted as it gradually enters the shaft insertion hole 54, and when the insertion is completed, it is completely lifted from the rear support plate 55. Then, the front support plate 48 of the storage stand 46 is fixed to the front plate 68 of the main body with screws 76 or the like after the insertion of the storage stand 46 into the main body is completed. As a result, the revolver developing unit is provided with the support plate 4 for the front of the accommodating base accurately positioned on the main body.
8 is supported by the support roller 49 of 8 and the central axis 52
The rear end portion is rotatably positioned on the rear plate 53 of the main body via the, and can be rotated.

Further, in a state where the storage table 46 is pulled out to the front side of the apparatus main body, the front end wall 50 of the developing device unit 40 is rotatably supported by the support rollers 49 of the storage table front support plate 48,
Further, since the rear end wall 51 of the developing device unit 40 is rotatably supported by the storage base rear support plate 55 and the revolver developing unit can be rotatably held, each revolver developing unit described later can be rotated appropriately. The developer replacement work for the developing device can be favorably performed in this pulled-out state. It should be noted that, in order to allow the revolver developing unit to rotate more smoothly in this pulled-out state, the same support roller as that on the front side may be used to support the rear support plate 55 side of the storage stand.

A revolver drive gear 78 driven by a revolver rotation motor such as a stepping motor (not shown) is attached to the main body rear side plate 53 for driving the rotation of the revolver developing unit. This is a revolver input gear 79 having substantially the same diameter as the rear end plate 51 fixed to the rear surface of the rear end plate of the developing device unit 40 by screwing or the like.
The revolver developing unit is rotationally driven by meshing with (see also FIG. 5A). The rear side plate 53 of the main body has a developing roller 8 in a developing device unit 40, which will be described later.
A developing drive gear 81, which is driven by a developing drive motor (not shown) for driving the motor 4 and the like, is also attached (see also FIG. 5A).

Next, the main body of the developing unit 40 will be described with reference to FIGS. In FIG. 3, the developing device unit 40 includes the front and rear end plates 50,
It has a partition wall provided between 51. This partition wall has a hollow cylindrical portion 82 into which a cylindrical black toner bottle containing black toner can be inserted, and a partition wall extending radially from the hollow cylindrical portion 82 to substantially circumferentially surround a space around the hollow cylindrical portion 82. The developing device casing sections 83, 83C, 83M, and 83Y are divided into four developing chambers of the same type.
In this embodiment, the structure and material of the hollow cylindrical portion 82 and the developing device casing portions 83, 83C, 83M, and 83Y prevent excessive temperature rise in each developing device. This point will be described in detail later. Each of the developing chambers contains a carrier as a developer and a two-component developer including toner of each color. In the illustrated example, the developing position facing the photoconductor drum is the developing chamber of the black developing device containing the black toner and the carrier, and in the counterclockwise order in the figure, the yellow developing device containing the yellow toner and the carrier is arranged. Development room,
It is a developing chamber of a magenta developing device containing magenta toner and a carrier, and a developing chamber of a cyan developing device containing cyan toner and a carrier.

Since the internal structure of each of the four developing chambers is exactly the same, the internal structure will be described below by taking the black developing chamber at the developing position in FIG. 3 as an example, and the internal structures of the other developing chambers will be described. As the reference numerals of the members to be used, yellow, magenta,
In order to distinguish the cyan developing chambers, reference numerals with Y, M, and C suffixes are shown in the drawing, and the description thereof is omitted.

In the black developing device at the developing position in the figure, an opening portion facing the photosensitive drum 1 is formed in the developing device casing portion 83, and a part thereof is exposed through the opening portion in the developing chamber. A developing roller 84 is provided. Further, in the developing chamber, a doctor blade 85 that regulates the amount of developer carried by a developing roller 84 and is conveyed to a portion facing the photosensitive drum 1, and the development regulated by the doctor blade 85 and held in the developing chamber An upper conveying screw 86 for conveying a part of the developer from the rear to the front along the central axis direction and a guide 87 thereof, and a stirring paddle 88 for stirring the developer in the developing chamber are provided. The stirring paddle 88 has a plurality of developer discharge holes 89a across the width of the developing roller 84.
And a plurality of stirring plate portions 90 radially extending from the peripheral surface of the hollow cylindrical portion 89. The hollow cylindrical portion 89 is provided with the agitating plate portion 90 radially extending from the peripheral surface thereof. A lower carrying screw 91 for carrying the developer in the opposite direction to the screw 86 is housed. In the developing device casing portion below the lower transport screw 91, when the developer is replaced due to the deterioration of the development in the developing chamber, the developer is used as a discharge port for the deteriorated developer and an input port for unused developer (toner mixed). A mouth 92 is formed. The agent exchange port 92 is covered from the outside by a cap 93 attached with a screw 94. The developer exchange using the agent exchange port 92 will be described in detail later.

In FIG. 4, the upper and lower conveying screws 8 are
The front end portions of the reference numerals 6, 91 extend to the outside of the front end wall 50 of the developing device unit, and the upper conveying screw 86 is extended to the extending portion.
There is provided a drop section 96 for dropping the developer conveyed by the above method onto the lower conveyance screw 91 by its own weight. Through this drop portion 96, the developer regulated by the doctor blade 85 and transported to the front side by the guide 87 and the upper transport screw 86 drops onto the lower transport screw 91,
After being conveyed within the effective width of the developing roller 84 by the lower conveying screw 91, it is discharged into the developing chamber from the developer discharge port of the stirring paddle hollow cylindrical portion. This causes so-called lateral stirring of the developer in the developing chamber. Further, the developer discharged from the developer discharge port of the hollow cylindrical portion 82 of the stirring paddle 88 to the developer pool at the lower part of the developing chamber is stirred by the rotation of the stirring paddle 88 on the stirring plate portion, whereby vertical stirring is performed. Done. Further, the front end portion of the lower transport screw 91 extends further to the front side than the dropping portion 96, and the toner receiving cases 91Y, M, C, 110 are provided corresponding to the developing chambers of the toner container unit 45. Toner replenishing roller 97 provided inside, specifically, in the case
Extends to below.

In the example of FIG. 3, the front and rear end wall portions that support the developing roller 84Y and the doctor blade 85Y are small end wall portions that can be separated from other front and rear end wall portions, as shown in the yellow developing device, for example. It is configured in 104. As a result, when cleaning the inside of the developing chamber or replacing parts, the developing roller 84Y and the doctor blade 85Y together with the small end wall portion 104.
It is easy to access to the developing room by removing.

Next, the toner container unit 45 will be described with reference to FIG. 2 again. The toner container unit 45 includes a disk-shaped unit face plate 108 and a total of four toner receiving cases 91Y, M, C attached to the front face of the face plate so as to correspond to each developing device in a one-to-one relationship.
Having 110. The unit face plate 108 has a circular through hole (not shown), through which a cylindrical black toner container can pass, formed in the central portion thereof, and the toner receiving cases 91Y, M, C, 110 are It is attached by escaping the through hole.

These four toner receiving cases 91
Of the Y, M, C, and 110, the three color toner receiving cases 91Y, M, and C corresponding to each color developing device are
A toner receiving port is formed facing upward when the corresponding developing chamber is located at the developing position. Then, in the mounting portion around the toner receiving port, color toner containing containers 42, 43, 4 having the same shape for each color containing the color toner are formed.
4 is mounted by sliding in the direction of the rotation axis of the revolver developing unit, with the toner discharge port facing downward.

On the other hand, the black toner receiving case 110 corresponding to the black developing device is the color toner receiving case 91.
The peripheral wall shape is substantially the same as the entire peripheral wall shape of the color toner containers 42, 43, and 44 attached to Y, M, and C. Then, a toner receiving opening having a shape corresponding to the toner discharge opening of the black toner container 41 is formed at a portion of the peripheral wall portion having a shape similar to that of the color toner receiving case and facing the center line of the revolver developing unit.

The black toner container 41 has a cylindrical shape, a toner discharge port is formed in the peripheral wall portion at one end in the longitudinal direction, and a protrusion for feeding toner is formed on the inner peripheral surface from the other end. It is formed in a spiral shape toward the toner discharge port side. With this spiral protrusion, the stored toner is sent from the rear end portion to the front end portion during the rotation integrally with the revolver developing unit attached to the revolver developing unit, and the black toner is received from the toner discharge port. The toner is supplied into the toner receiving port of the case. Such a black toner container 41 has its rear end partway inside the hollow cylindrical part 82 of the developing device unit 40 through the center part of the toner container insertion notch 47 a formed in the cover 47. The toner container unit 45
Each of the cases is attached in a state of being inserted until it is substantially flush with the front surface of the front end wall portion.

The black toner receiving case 11 is shown in FIG.
0 as an example, inside each of the four toner receiving cases 91Y, M, C, 110,
A toner replenishing roller 97 is provided. The toner replenishing roller 97 is provided in the case when the corresponding developing chamber is located at the developing position.
1 is pivotally supported by the front end wall portion of the case and the unit face plate 108 so as to be located almost directly above the extending portion. The shaft end portion of the toner replenishing roller 97 pivotally supported by the unit face plate 108 penetrates the face plate 108 and the developing unit 40.
The gear 197 is fixedly provided at the protruding end. A supply input gear for drive input (not shown) that meshes with the gear 197 is rotatably provided on the surface of the unit face plate 108 on the developing unit side. Among the replenishment input gears provided for each toner replenishment roller 97, the one corresponding to the toner replenishment roller 97 in the case corresponding to the developing device at the developing position is the gear driven by the above-mentioned replenishment motor 61. The motor 61 can be rotationally driven by engaging with (see FIG. 2). The toner dropped onto the lower carrying screw 91 by the rotation of the toner supply roller 97 is taken into the developer dropped from the upper carrying screw 86 on the way, and is mixed with each other and carried into the developing chamber by the lower carrying screw 91. , Increase the toner concentration of the developer in the developing chamber.
The toner supply control is performed by the rotation control of the toner supply roller 97.

Next, with reference to FIGS. 5A and 5B, a mechanism for rotationally driving a rotating body such as a developing roller in the developing unit 40 will be described. The illustrated gears are provided on the rear end wall 51 of the developing device unit 40, specifically, on the rear side of the revolver input gear 79 fixedly mounted on the rear end wall 51. That is, the developing roller gear 98 is attached to the shaft end portion of the developing roller 84 which penetrates the rear end wall 51 and the like and protrudes to the rear side of the revolver input gear 79.
Similarly, the upper and lower conveying screw gears 99 and 100 are fixed to the shaft ends of the upper and lower conveying screws 86 and 91, respectively, which project rearward from the revolver input gear 79. In the illustrated example, the developing roller 84
A development input gear 95 for meshing with an idle gear 101 that meshes with a gear and the lower transport screw gear 100 and a development output gear 81 that is mounted on the rear plate 53 of the main body and is driven by a development driving motor 80 is a development unit gear. It is attached to the back side of the rear end wall 51. As shown in FIG. 5 (a), these gears are installed in the printer main body by the revolver developing unit provided on the rear end wall side being supported by the storage stand 46 and inserted into the printer main body as described above. Side developing output gear 81 meshes with the revolver developing unit side developing input gear 95. At the same time, as shown in FIG. 5A, the revolver output gear 78 on the main body side is meshed with the revolver input gear 79 on the revolver developing unit side.

FIG. 5 shows a state in which the above engagement is realized.
In (a), during development, the development output gear 81 is driven in the direction shown by arrow A in the figure, and the upper and lower conveying screw gears 99 and 100 rotate via the developing input gear 95 meshing with this, and the upper and lower conveying screws rotate. Driven. Further, the developing roller gear 98 is rotated via the developing input gear 95, the lower carrying screw gear 100 and the idle gear 101,
The developing roller 84 is rotationally driven.

When the developing device to be used is switched, the revolver output gear 79 driven by the revolver driving motor is rotationally driven in the direction of arrow B shown in FIG. 5A to move the revolver developing unit to the arrow C. By rotating in the direction, the developing device positioned at the developing position is switched, and the positioning roller 66 is inserted into the recess 65 formed at a predetermined position on the peripheral surface portion of the rear end wall 51 of the revolver developing unit and fitted. , Position the revolver development unit. After the positioning, when the developing drive gear 81 is rotated in the direction of arrow A, a rotational moment indicated by arrow D in the figure acts on the revolver developing unit. Therefore, in order to position the revolver developing unit against this rotation moment, for example, as shown in FIG. 5 (b), the shape of the concave portion 65 is changed to the concave portion where the roller 66 rides up and slips out when rotating in the direction of the arrow C. It is desirable to make a comparatively gentle inclination, and to make the locking concave portion 65b a relatively steep inclination.

As shown in FIGS. 5 (a) and 5 (c), the bias circuit 105 is connected to a fixed position of the rear plate 53 of the main body, which is opposed to the end of the developing roller shaft 98a of the developing device located at the developing position. Bar terminal 10 for applying developing bias
6 is attached by a bracket 107 so as to be able to retract in the sliding direction of the storage table, and is urged toward the front side of the main body by a spring 107a as urging means.

Next, the structure and material of the hollow cylindrical portion 82 and the developing device casing portions 83, 83C, 83M and 83Y in this embodiment for preventing excessive temperature rise in each developing device will be described. In the printer of this embodiment, the fixing device 1
A heating / pressurizing fixing system using a heat roller or the like is used as 2, and as can be seen from FIG. 1, the rotary developing device 4 is arranged so as to approach the fixing device 12 partially. It is arranged. Therefore, the temperature inside the developing device unit 40 of the rotary developing device 4 easily rises. Therefore, in the present embodiment, the developing device casing portions 83, 83C, 83M,
83Y has a hollow inside and the front end wall 50 of the developing unit 40.
Is formed so as to extend radially from the outer circumference of the hollow cylindrical portion 82 that communicates with the outside.
Is used as a part of the peripheral wall of the developing chamber, it is possible to exchange heat between the outside air outside the developing chamber and the developing chamber through the peripheral wall portion. The hollow cylindrical portion 82 and the developing device casing portion 8 are arranged so that this heat exchange can be favorably performed.
3, 83C, 83M, and 83Y are integrally formed of a material having good thermal conductivity such as aluminum. Due to this integral formation, for example, even when the revolver developing unit is not rotated for a long period of time and only the specific developing device is located near the fixing device 12, the heat of the specific developing device is applied to the hollow cylindrical portion 82 and the developing device. Container casing 83, 83C,
Others can be diffused with 83M and 83Y. Further, the integral formation allows the function of the span material to be exhibited, and the rigidity of the developing device unit can be enhanced. In this embodiment, the hollow cylindrical portion 82 for preventing the temperature rise in the developing device is also used as the partial storage space of the black toner storage container 41 as described above. The size of the device can be reduced while using the relatively large capacity black toner container 41.

Next, the replacement of the developer in the developing device will be described. In the replacement of the developer in this embodiment, in order to efficiently discharge the deteriorated developer from the replacement port 92,
The revolver developing unit is pulled out from the printer main body via the housing 46. First, in order to remove the lid that closes the exchange port 92 without spilling the developer, the developer to be replaced with a developer is a horizontal line and a vertical line passing through the rotation center line of the developing device unit in FIG. 6A. When it is divided into four quadrants, the exchange port 92 is rotationally moved to a position facing upward in the second quadrant. This rotation can be done manually. The direction of rotation by this manual operation may be the same as the direction of rotation when switching the developing device used,
It may be reversed. However, when performing in the opposite direction, the rotary positioning roller 65 fitted into the recess 65 (see FIGS. 2 and 5) on the peripheral surface of the rear end wall 51 of the developing device unit as necessary.
By manually swinging the bracket 64,
Escape from.

The position where the exchange port 92 in the second quadrant faces upward is the developer input position. In this embodiment, when the developing device to be exchanged with the developer is positioned at this exchange position, another The formation position of the exchange port 92 in each developing device is set so that the developing device takes the developing position. That is, the revolver developing unit is formed by inserting the rotary positioning roller 65 into the recess 65 (see FIGS. 2 and 5) in the peripheral surface of the rear end wall 51 of the developing device unit for positioning the developing device used for the above-described development at the developing position. The rotation regulating function can be used as it is for regulating the rotation of the revolver developing unit when the developer is replaced. Moreover, this rotational position positioning roller 65
Since it is attached not to the apparatus main body side but to the storage table 49, the rotation restriction can be performed in the state where the storage table 49 is pulled out to the front side of the apparatus.

At this developer feeding position, the screw 94 is removed to remove the lid 93 closing the exchange port 92. Then, using the screw holes for the screws 94, the jaws 200 as shown in FIG. This jogo 20
The opening 200b on the mounting side of 0 has a shape corresponding to the agent exchange port 92, and faces the exchange port 92 in the mounting state by the screw 201. Then, in the opening 200a portion on the opposite side of the jogo 200, for example, as shown in FIG.
A recovery bag 210 made of, for example, vinyl, as shown in the fourth quadrant, is attached in such a state that the opposite side opening 200a portion is inserted into its mouth.

Then, while maintaining this attachment state by hand, for example, the developing device to be replaced is moved to the developer collecting position in which the replacement port 92 faces downward, which is shown in the fourth quadrant of FIG. 6A. .. This developer collecting position is made to coincide with the developing position, and here, as indicated by an arrow 202 in the figure, the developer inside the developing device is collected into the collecting bag 210 via the jogo 200. In this recovery, the developer in the developing device is replaced by its own weight by the exchange port 9.
It is carried out by letting it flow down through 2 (see the arrow indicated by 202 in the figure). Then, in order to separate the developer held by the magnetic force on the developing sleeve from the developing sleeve and let it flow down by its own weight, the developing input gear 95 (see FIG. 6) is rotated by using a jig or the like, and the developing roller is rotated. 84, the upper and lower conveying screws 86, 91 and the paddle 88 are rotated. The direction of rotation of the development input gear 95 may be either forward or reverse. However, as described above, a rotational moment is applied to the revolver developing unit by applying a rotational force from the outside for the rotation of the development input gear 95. It is desirable to set the rotation direction during normal development. This is because the direction of the rotational moment is such that the positioning roller 66 is the concave portion 6
This is because the revolver developing unit can be prevented from rotating carelessly because the direction is locked by 5. In the illustrated example, the actual transfer of the agent from the developing device to the recovery bag 210 starts during the rotational transfer from the developer input position to the developer recovery position.

When the collection of the developer into the collection bag 210 is completed, the collection bag 210 is detached from the jogo 200, and the revolver developing unit is rotated as it is, and the developing device to be replaced with the developer is shown in FIG. 6 (a). It is moved to the developer introducing position in the second quadrant of 1. Then, as shown by an arrow 203 in the figure, a new developer is charged into the developing device through the jogo 200. Even when the unused developer is charged, the developer can be uniformly dispersed by rotating the developing roller 84, the vertical transport screws 86 and 91, and the stirring paddle 88 in the same manner. Then, when the supply of the developer is completed, the jogo 200 is removed from the exchange port 92, and the exchange port 92 is closed with the lid 93. Then, the storage stand 46 is pushed into the printer body and set at a predetermined position. As a result, the developer replacement work is completed.

Next, another embodiment, that is, an embodiment different from the above-mentioned embodiment in that the jogo 200 as a jogo member is provided with a recovery container 210 for accommodating the recovered developer will be described. Note that the description of the above embodiment is applied to points that are not particularly described. FIG. 7A is a front view of a jogo used for replacement work in a rotary developing device according to another embodiment, and FIG. 7B is a left side view of the jogo.
FIG. 8C is a plan view of the jogo, and FIG. 8A is a front view of a recovery container used for replacement work in the rotary developing device.
9B is a left side view of the recovery container, FIG. 9C is a plan view of the recovery container, FIG. 9A is a front view of the elastic seal member, and FIG.
[Fig. 4] is a left side view of the elastic seal member.

First, the jogo 200 will be described.
As shown in FIGS. 7A to 7C, a jogo 200 as a jogo member used in this embodiment has a joining plate 200B having an opening 200b corresponding to the developer exchange port 92, and a recovery container 210 described later. The joining plate 200A having an opening 200a corresponding to the opening 210a and a hollow connecting member 200C. The joining plate 200B and the joining plate 200A are the hollow connecting member 2
It is connected by 00C. And the above-mentioned joining plate 2
00A is provided with a pair of rails 204 at an edge portion that is parallel to the longitudinal direction of the jogo 200, and the rails 204 and 204 are used to collect the jogo 200 when the developer is recovered, which will be described later. It is joined to the container 210. Further, the joint plate 200B has screw holes 201.
a is provided, and the jogo 200 is fixed to the developing device through the screw hole 201a when the developer is replaced.

Next, the recovery container 210 is shown in FIG.
As shown in (c), the rail receiving collar 210A has an opening 210a, a container body for storing the recovered developer, and a hollow connecting member 210C.
10A and the container body are connected by the hollow connecting member 210C.

Explaining further, the rail receiving flange 210 described above.
A is, when one end edge in the longitudinal direction thereof is joined to the joygo 200 and the recovery container 210 as described below, at least one of the joygo member and the recovery container has the joygo member and the recovery container 210. A thrust stopper 211 is provided as a restricting member that restricts sliding of the jogo member and the recovery container beyond an appropriate positional relationship with the recovery container. The thrust stopper 211 has an appropriate positional relationship during the joining.

The side surface of the rail receiving flange 210A facing the joining plate 200A during the above joining (hereinafter referred to as the side surface of the rail receiving flange 210A) is shown in FIG.
As shown in (b), it is sealed by the elastic seal member 230.

This elastic seal member 230 is shown in FIG.
As shown in, the material 231 (hereinafter,
A low friction coefficient material), for example, a polyethylene tape such as Sumitomo 3M Ultra Tape, and an elastic member 232 such as foamable polyurethane sponge.
These are bonded and formed via an adhesive or the like.
The elastic seal member 230 is the elastic member 2
32 is set to the side of the rail receiving flange 210A and is bonded to the side surface.

Further, in the elastic seal member 230, the length of the low friction coefficient material 231 is as shown in FIGS. 9 (a) and 9 (b).
As shown in FIG. 7, the rail receiving flange 210A is extended more than the longitudinal length of the rail receiving flange 210A. It is glued.
This allows the recovery container 210 to have the rail receiving collar 2 when it is joined to the jogo 200 as described later.
Even if one end edge of 10A comes into contact with the insertion side end edge of the rail 204, the elastic seal member 230 is prevented from peeling off from the one end edge.

The recovery container 210 is arranged in the circumferential direction of the developing device unit as the developing device unit is rotationally moved from a developer collecting position shown in FIG. 12 to a developer loading position shown in FIG. A developer accumulating portion 212 in which the collected developer is accumulated is provided at a position distant from the opening of the collecting container, and the container body is used as an indicator part for indicating the total amount of the collected developer. The scale 213 is provided. Then, the amount of the developer accumulated in the developer accumulating portion 212 can be confirmed at a glance. Furthermore, the recovery container 210 is also used as a rotation stop member for stopping the rotation of the developing device unit, and this point will be described later.

The above-mentioned jogo 200 and recovery container 210
And are joined in the following manner during the developer replacement work. That is, the jogo 200 and the collection container 210 are
On the pair of rails 204 in the jogo 200,
By inserting the rail receiving flange 210A in the recovery container 210, they are slidably joined to each other as shown in FIG. During this joining, the rail receiving flange 210A is attached to the thrust stopper 21 so that the position of the opening 210a and the position of the opening 200a do not shift.
1 is pushed in until it contacts one edge of the rail 204. And the above-mentioned jogo 200 joined in this way
In the recovery container 210, since the elastic member 232 is interposed between the side surface of the rail receiving collar 210A and the joining plate 200A, there is no gap, and the developer is collected and charged during the development. The agent is designed to prevent leakage. Further, since the jogo 200 moves while coming into contact with the low friction coefficient material 231, the recovery container 210 can be easily attached and detached.

Next, the exchange of the developer in the developing device will be described. In the replacement of the developer in this embodiment, in order to efficiently discharge the deteriorated developer from the replacement port 92,
The revolver developing device unit 40 is removed from the printer main body together with the housing 46, that is, in the state shown in FIG.

First, the exchange port 92 without spilling the developer
To remove the lid blocking the developer unit 40
As shown in FIG. 15, the accommodation stand 46 (see FIG. 2) is turned over so that the replacement port 92 of the developing device to be replaced with the developer faces upward.

At this falling position, the screw 94 is removed to remove the lid 93 that closes the exchange port 92, and the screw hole for the screw 94 is utilized to make use of the joining plate 20 of the jogo 200.
By fixing 0B with a screw, the jogo 200 is attached to the developing device as shown in FIG. And
The accommodating table 46 is turned over again to return to the state shown in FIG.

Next, as described above,
00 and the recovery container 210 are mutually slid and joined. Then, after this joining, as described above, the roller 66 is released, and the developing unit 40 is moved to the developer collecting position shown in FIG. Rotate and move around. At this time, the recovery container 210 is also used as a rotation stop member for stopping the rotation of the developing device unit 40. That is, the recovery container 210 moves in the rotation direction of the developing device unit 40 as it rotates. Then, when the exchange port 92 of the developing device comes to a position facing directly below, a part 210P of the recovery container 210 is shown in FIG.
As shown in FIG. 2, the developing unit 40 is stopped by coming into contact with a part 46P of the accommodating base 46. As a result, the developing device unit 40 stops its rotation at the developer collecting position where the recovering property is good. And the developing device is
The developer is collected at the developer collecting position having the best collecting property.

At this developer collecting position, the developer inside the developing device is collected into the collecting container 210 via the jogo 200 as shown by an arrow 202 in FIG. This recovery is performed by causing the developer in the developing device to flow down by its own weight through the exchange port 92 (see the arrow indicated by 202 in the figure).

Further, at the time of this collection, in order to separate the developer held by the magnetic force on the developing sleeve from the developing sleeve and let it flow down by its own weight, the developing input gear is rotated by using a jig or a hand. , The developing roller 84, the vertical transport screws 86 and 91, and the paddle 88 are rotated. Here, in the case of rotating with a hand, if the developing input gear 95 ′ with a knob (see FIG. 16) is used as the developing input gear, it can be easily rotated.

The direction of rotation of the developing input gear 95 'may be either forward or reverse. Since a rotation moment is applied, it is desirable to set the rotation direction in the normal development. This is because even if the developing unit 40 tries to rotate due to the action of the rotation moment, the collecting container 210 attached to the developing device is in contact with the accommodating base 46, so that the developing unit 40 rotates carelessly. This is because it can be prevented. In the illustrated example, the movement of the developer from the actual developing device to the recovery container 210 starts during the rotational movement from the developer input position shown in FIG. 10 to the developer recovery position shown in FIG. .

After the recovery of the developer into the recovery container 210 is completed, the developing and developing unit 40 is rotated counterclockwise and returned to the initial state shown in FIG. 14, and in this state, the recovery container is recovered. 210 is slid and removed from the jogo 200. At this time, the developer in the recovery container 210 is accumulated in the developer accumulating portion 212 by its own weight due to the rotational movement.

After that, as shown in FIG. 15, the accommodating base 46 is turned over so that the exchange port 92 of the developing device faces upward, and a new developer is put on the jogo 200 as shown by an arrow 203 in the drawing. It is charged into the developing device through. Even when this new developer is charged, the developer can be uniformly dispersed by rotating the developing roller 84, the vertical transport screws 86 and 91, and the stirring paddle 88. After the introduction of the developer is completed, the jogo 200 is removed from the exchange port 92, and the exchange port 92 is closed with the lid 93. Then, the storage stand 46 is pushed into the printer body and set at a predetermined position. As a result, the developer replacement work is completed.

The developer collected as described above is graduated on the scale 21 provided in the main body of the collection container 210.
The total recovery amount is confirmed by 3.

The present invention is not limited to the above embodiment, but can be variously modified. For example, although the above-mentioned other embodiment is an example in which the suppressing member is provided in the recovery container, the suppressing member may be provided on the jogo member, or may be provided on the jogo member and the recovery container. . Further, in the other embodiments, the elastic seal member is provided on the recovery container, but it may be provided on the jogo member or may be provided on the jogo member and the recovery container.

[0086]

According to the rotary type developing device of the first aspect, the inside of each developing device can exchange heat with the outside air through the peripheral wall of the hollow member which constitutes the bottom wall of the casing. Therefore, as disclosed concretely in the above-mentioned Japanese Utility Model Publication No. 4-32680, the partition wall radially extending from the rotating shaft portion having a relatively small diameter constitutes a common casing wall between adjacent developing devices. As compared with the case of doing so, the temperature rise in the developing device can be suppressed. Therefore, it is possible to reduce the occurrence of the above-mentioned firefly image caused by the lump of toner softened by the temperature rise in the imager unit. Moreover, in order to exchange heat between the inside of each developing device and the outside air, a hollow member having a hollow portion around the central axis is also used by a plurality of developing devices.
It is possible to minimize the size increase of the device.

Further, not only the hollow member but also the partition wall is made of a material having a good thermal conductivity, and only a specific developing device which is continuously located in the vicinity of a heat generating device such as a fixing device is used. Since it is possible to prevent the temperature from rising excessively, it is possible to reduce the occurrence of the firefly image even when such a state continues.

If the hollow member and the partition wall are integrally formed, they can function as span members in the direction of the rotation center line in the entire developing device, so that the device can be made compact and the rigidity can be improved.

According to the rotary type developing device of the second to thirteenth aspects, after the internal developer is made to flow down from the downward-facing exchange port at the developer collecting position, the developing device to be replaced with the developer is placed at the developer introducing position. The exchange port is turned upward so that the exchange port faces upward, and thus the exchange port can also be used for charging the developer. Therefore, not only the developer can be collected from the same exchange port while the developer unit is rotated, but also the developer can be input, so that the workability of the developer exchange can be improved as compared with the conventional case.

Particularly, according to the rotary developing device of the third aspect,
At the developer recovery position or the developer input position,
Since the jaws are attached to the exchange port, and thus the developer can be collected and put in with both hands free, the workability of the developer exchange can be improved. Further, the jogo can prevent the collected or charged developer from scattering around. When the developer is collected, if a bag made of vinyl, for example, is applied to the downward opening of the jogo so that the collected developer flows down into the bag, the developer flowing down from the exchange port is blown to the outside. Spills can also be completely prevented.

Further, in particular, according to the rotary type developing device of the fourth aspect, the exchange port for collecting and charging the developer is formed in each developing device so as to expose a part of the developer carrying member. Since it is provided separately from the above, the diameter and position of the developer can be set in consideration of the efficiency of developer exchange. Therefore, by setting the diameter and the like in consideration of the efficiency of developer exchange, a quick or easy exchange operation can be realized.

According to another aspect of the rotary developing device, the recovery container has an opening connectable to the opening of the jogo member, and the opening of the jogo member is closed by the recovery container. Since the developer can be collected and charged in the above state, the above-mentioned jogo can prevent the collected or charged developer from scattering around. In addition, since the above-mentioned jogo is equipped with a developer recovery container,
The developer flowing down from the exchange port is stored in the storage container, and it is possible to completely prevent the developer from being blown out or spilled.

In particular, according to the rotary type developing device of the sixth aspect, since the jogo member and the recovery container slide with each other and they can be easily attached and detached, the work time for exchanging the developer is shortened. be able to.

Further, according to the rotary type developing device of the seventh aspect, when the joug member and the recovery container are joined so as to have an appropriate positional relationship with each other, the recovery container is connected to the jogo member. By sliding the regulation member provided on at least one of the member and the recovery container until the regulation member comes into contact with the jogo member, the mutual positional relationship can be made appropriate. Therefore, it is possible to reliably set the jogo member and the recovery container in a short time.

Further, in particular, according to the rotary type developing device of claim 8, the collected developer is rotated in the circumferential direction of the developing device unit as the developing device unit is rotated from the collecting position to the developer introducing position. Moreover, since there is no developer in the vicinity of the opening of the recovery container and the developer is removed when the recovery container is removed from the jogo member, It is possible to prevent the developer from scattering around and improve the workability of the developer replacement.

According to the rotary developing device of the ninth aspect, the total amount of the collected image agent can be grasped by the index portion provided in the recovery container. Therefore, by comparing with the amount of the developer to be recovered, It is a guide for estimating the amount of the developer that remains without being recovered. That is, when collecting the developer, the worker rotates the developing input gear by using a jig or a hand to collect the developer held by the magnetic force on the developing sleeve, and the developing roller or the vertical transport screw. Rotate etc. At this time, the operator cannot usually know whether or not all the developer has been collected, but by marking the collection container with the amount of the developer that was previously charged, it is possible to reach near that mark. If the developer is collected, it can be known that the collection is almost completed. As a result, the worker does not rotate the development input gear more than necessary, so that the workability of replacing the developer can be improved.

Further, in particular, according to the rotary developing device of the tenth aspect, since the elastic member is provided on the sliding surface of the jogo member and the recovery container, there is no gap, and the developer is recovered and charged. In addition, the developer can be prevented from leaking and the developer will not be scattered to the surroundings. Further, since the jogo member moves while being in contact with the low friction coefficient material, the recovery container can be easily attached and detached. Due to these, the workability of the developer exchange can be improved.

Further, according to the rotary type developing device of the eleventh aspect, at least one longitudinal edge of the sliding portion sealed by the elastic seal member is sealed by the elastic seal member. When joining the recovery container and the recovery container, the elastic seal member does not flip up and peel off from the one end edge. Therefore, the recovery container can be joined to the jogo member while the elastic seal member is properly attached.

Further, according to the rotary type developing device of the twelfth aspect, when the drive system is externally driven at the time of exchanging the developer, the rotary body with the knob is gripped and rotated to develop the rotary member. Since the agent carrier can be easily driven, the workability of exchanging the developer can be improved.

Further, according to the rotary type developing device of the thirteenth aspect, when the developer is collected, the developing unit is stopped by the collecting container at the developer collecting position having a good collecting property. It is possible to carry out a stable recovery work without using a toner, and to improve the workability of the developer replacement.

[Brief description of 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 rotary developing device.

FIG. 4 is an explanatory view of a connection structure between a developing device and a toner container in the rotary developing device.

FIG. 5A is an explanatory diagram of a drive system of the rotary developing device.
(B) is an explanatory view of a modification of the drive system. FIG. 6C is an explanatory diagram of a developing bias supply device of the rotary developing device.

FIG. 6A is an explanatory diagram of a developer replacement work. (B) is a perspective view of the jogo used for the replacement work.

FIG. 7A is a front view of a jogo used for replacement work in a rotary developing device according to another embodiment. (B) is a left side view of the same jogo. (C) is a plan view of the same jogo.

FIG. 8A is a front view of a recovery container used for replacement work in the rotary developing device. (B) is a left side view of the collection container. (C) is a top view of the collection container.

FIG. 9A is a front view of an elastic seal member. (B) is a left side view of the elastic seal member.

FIG. 10 is an explanatory diagram of a developer replacement operation in the rotary developing device.

FIG. 11 is an explanatory view of the same developer replacement work.

FIG. 12 is an explanatory view of the same developer replacement work.

FIG. 13 is an explanatory diagram of the same developer replacement work.

FIG. 14 is an explanatory view of the same developer replacement work.

FIG. 15 is an explanatory diagram of the same developer replacement work.

FIG. 16 is an explanatory diagram of a connection structure between a developing device and a toner container in the rotary developing device.

[Explanation of symbols]

1 photoconductor drum 4 Rotating developing device 40 developer unit 41 Black toner container 50 Front end wall 82 Hollow cylinder 83, 83C, 83M, 83Y Developing unit casing part 200 Joego 201 mounting screw 204 rails 210 collection container 210A rail receiving collar 211 Thrust stopper 212 stacking unit 230 Elastic seal member 231 Low coefficient of friction material 232 Elastic member

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[Procedure amendment]

[Submission date] May 7, 2002 (2002.5.7)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Delete

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Delete

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Delete

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

[0006]

However , in such a rotary type developing device, since a plurality of developing devices are incorporated in the rotating developing unit, when the developer is replaced due to deterioration of the developer. As compared with the developer exchange for a single developing device, the exchange work is complicated and the developer tends to be spilled on the periphery at the time of exchange.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

[0009] Accordingly, it is an purpose of the present invention is to provide a rotary type developing device which can improve the workability of the developer replacement than conventional.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Delete

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

[0011]

To achieve the above Symbol purpose SUMMARY OF THE INVENTION, rotary type developing device according to claim 1, the developer unit having a plurality of developing devices arranged around a rotation center line, In a rotary developing device that rotates around the rotation center line and moves an arbitrary developing device to a developing position facing the latent image carrier to perform development, replace the stored developer inside each of the plurality of developing devices. And a developer collecting position in which each developing device has a replacement port facing downward and a developer loading position in which the replacement port faces upward. It is characterized in that it is configured to be rotatable so that it can be obtained. A rotary developing device according to claim 2.
Is a rotary developing device according to claim 1,
The side structure is designed so that the jogo member can be attached and detached.
It is a feature. The rotary developing device according to claim 3
The rotary developing device according to claim 1, wherein the exchange port is the exchange port.
For supplying a developer to the latent image carrier
What is the opening formed in each developing unit to expose a part of
It is characterized by being provided separately. Also, the claims
The rotary developing device according to claim 4 is the rotary developing device according to claim 2.
The jaw member can be connected to the opening.
Characterized by having a collection container having a mouth
Is. According to a fifth aspect of the present invention, there is provided the rotary developing device according to the fourth aspect.
The rotary developing device of
The container and the container can be connected to each other by a slide.
It is characterized by that. Further, the rotary type according to claim 6.
The developing device is the rotary developing device according to claim 5, wherein:
At least one of the jogo member and the recovery container
The proper positional relationship between the jogo member and the collection container.
Beyond that, the jogo member and the recovery container slide over.
It is characterized in that a regulating member for regulating the idling is provided.
It is something. The rotary developing device according to claim 7 is a contractor.
In the rotary developing device according to claim 4, 5, or 6, the above-mentioned development is performed.
From the opening of the collection container in the circumferential direction of the container unit
The developer collected from the opening is collected in the collecting container part which is distant from the developing container.
Agent is rotated from the developer collecting position of the developing unit
It is characterized in that a developer accumulating portion accumulating with
To do. The rotary developing device according to claim 8 is
The rotary developing device according to claim 4, 5, 6, or 7,
Corresponds to the total amount of developer to be collected in the collection container
It is characterized in that an index portion is provided. Also, the contract
The rotary developing device according to claim 9 is the same as claim 4, 5, 6, 7 or
In the rotary developing device of No. 8, the jogo member and the
At the sliding part with the recovery member,
Relative friction on at least one surface of the recovery member
An elastic seal member having a surface with a small coefficient is
Characterized by being provided so as to be a sliding surface with the other surface
It is something to do. The rotary developing device according to claim 10.
In the rotary developing device according to claim 9,
The above-mentioned joint in which the elastic member is covered with the elastic seal member.
To cover the edge on the upstream side in the sliding direction of the surface
It is characterized by being provided. In addition, claim 11
The rotary developing device according to claim 1, 2, 3, 4, 5, 6,
In the rotary type developing device of 7, 8, 9 or 10, the latent image bearing is carried out.
Driving a developer carrier for supplying developer to the carrier
Specially equipped with a knob on the rotating body included in the drive system for
It is a characteristic. The rotary developing device according to claim 12.
The arrangement is defined in claim 4, 5, 6, 7, 8, 9, 10 or 11.
In the rotary developing device, the recovery container is replaced by the developing device.
Used as a rotation stop member to stop the rotation of the unit
It is characterized by that.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Delete

[Procedure Amendment 10]

[Document name to be amended] Statement

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[Procedure Amendment 11]

[Document name to be amended] Statement

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[Procedure Amendment 12]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Delete

[Procedure Amendment 13]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Delete

[Procedure Amendment 14]

[Document name to be amended] Statement

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[Correction method] Delete

[Procedure Amendment 15]

[Document name to be amended] Statement

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[Correction method] Delete

[Procedure Amendment 16]

[Document name to be amended] Statement

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[Correction method] Delete

[Procedure Amendment 17]

[Document name to be amended] Statement

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[Correction method] Delete

[Procedure 18]

[Document name to be amended] Statement

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[Correction method] Delete

[Procedure Amendment 19]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Delete

[Procedure amendment 20]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Delete

[Procedure correction 21]

[Document name to be amended] Statement

[Name of item to be corrected] 0024

[Correction method] Change

[Correction content]

[0024]

In the rotary developing device according to the first to twelfth aspects, the developing device for exchanging the developer is rotationally moved to the developer collecting position in which the exchange port faces downward, and the internal weight of the developer is utilized. The developer is caused to flow out from the exchange port. afterwards,
The developing device is rotated and moved to a developer feeding position in which the exchange port of the developing device faces upward, and new developer is introduced into the inside through the exchange port. Particularly, in the rotary developing device according to claim 2, the above
At the developer recovery position or developer input position,
With the jogo attached to the exchange port,
Collect and input. In particular, the rotary developing device according to claim 3.
In order to expose a part of the developer carrying member,
Through the exchange port provided separately from the opening formed in the imager
Collect and put in the image agent. Particularly, the rotary developing device according to claim 4.
In the storage, the recovery container is the opening of the above-mentioned jogo member.
It has an opening that can be connected to the
Since the mouth is closed by the collection container, the developer is put in.
Alternatively, the developer does not scatter during recovery. In particular, the claim 5 times
In the transfer type developing device, the recovery container is
Sliding and connecting with the member, the collection container can be easily
Desorbed. Particularly, in the rotary developing device according to claim 6,
Holds the collection container,
The suppression member provided on at least one of the
To slide it until it abuts the jogo member
Therefore, the mutual positional relationship becomes appropriate. In particular, the claim
In the transfer type developing device, the collected developer is a container
Accumulated in the developer accumulating portion inside. In particular, the rotary type of claim 8
In the image device, the indicator part provided in the collection container
, The total amount of developer to be collected and collected is shown.
As a guide to estimate the amount of developer that remains without being collected
Become. That is, the worker can
In order to recover the developer that is magnetically held on top,
Rotate the image input gear using a jig or hand to
Rotate the vertical transport screw etc. At this time, usually
The trader cannot know whether all the developer has been collected.
A mark indicating the amount of developer that was previously added to the collection container.
By attaching, the developer is collected up to the mark.
If it is done, it is possible to know the state that the collection is almost completed.
it can. This makes it possible for the operator
Never rotate. Particularly, the rotary developing device according to claim 9.
, The recovery member and the recovery container are
Since the elastic member is present on the moving surface, there is no gap,
The developer will not leak when collecting and loading
Growling. Also, the jogo member has the low friction.
Since it will move while contacting the coefficient material, the above recovery
Easy to attach and detach the container. Particularly, the rotary development according to claim 10.
In the device, after covering with the elastic seal member
The edge of the joint surface on the upstream side in the sliding direction also has the above elasticity.
It is sealed by a seal member. Therefore, the above
When connecting the jogo member and the collection container, store them as described above.
In the container, the elastic seal member is flipped up from the one edge.
It is joined to the jogo member without peeling off. Special
The rotary developing device according to claim 11, wherein a knob is provided.
When rotating the rotating body, the rotating body included in the drive system
The developer carrier is driven. In particular, the rotary type according to claim 12.
In the developing device, the developer unit
The above-mentioned collection container makes the rotation of the
Stop at the developer recovery position.

[Procedure correction 22]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Delete

[Procedure amendment 23]

[Document name to be amended] Statement

[Correction target item name] 0026

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[Procedure correction 24]

[Document name to be amended] Statement

[Name of item to be corrected] 0027

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[Procedure correction 25]

[Document name to be amended] Statement

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[Procedure Amendment 26]

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[Procedure Amendment 27]

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[Procedure correction 28]

[Document name to be amended] Statement

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[Procedure correction 29]

[Document name to be amended] Statement

[Name of item to be corrected] 0032

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[Procedure amendment 30]

[Document name to be amended] Statement

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[Procedure correction 31]

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[Procedure correction 32]

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[Procedure amendment 33]

[Document name to be amended] Statement

[Correction target item name] 0086

[Correction method] Delete

[Procedure amendment 34]

[Document name to be amended] Statement

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[Correction method] Delete

[Procedure amendment 35]

[Document name to be amended] Statement

[Correction target item name] 0088

[Correction method] Delete

[Procedure correction 36]

[Document name to be amended] Statement

[Correction target item name] 0089

[Correction method] Change

[Correction content]

[0089]

According to the rotary type developing device of the first to twelfth aspects, after the internal developer is made to flow down from the downward-facing exchange port at the developer collecting position, the developer to be exchanged for the developer is set to the developer. Rotate to the loading position and turn the exchange port upwards,
As a result, the exchange port can also be used for charging the developer. Therefore, not only the developer can be collected from the same exchange port while the developer unit is rotated, but also the developer can be input, so that the workability of the developer exchange can be improved as compared with the conventional case. Particularly, in the rotary developing device according to claim 2,
According to the above, at the developer collecting position or the developer input position,
Then, a jogo is attached to the exchange port,
With both hands free, the developer is collected and put in.
Can improve the workability of developer replacement.
be able to. In addition, the Joego can collect or
It is possible to prevent the supplied developer from scattering around. In addition,
When the developer is collected, for example, in the downward opening of the jogo,
Apply a bag made of vinyl and put the collected developer in the bag.
If it is made to flow down, the developer flowing down from the exchange port
It is possible to completely prevent blowouts and spills to the outside.
It Further, in particular, according to the rotary type developing device of claim 3,
An exchange port for collecting and inputting the image agent is used as a part of the developer carrier.
To expose the
Therefore, considering the efficiency of developer replacement, its diameter and position
Can be set. Therefore, the efficiency of developer replacement such as its diameter
By setting in consideration of
A replacement work can be realized. In particular, the rotary developing device according to claim 4.
According to the above, the recovery container is placed in the opening of the above-mentioned jogo member.
It has a connectable opening, and the opening of the above-mentioned jogo member.
The developer is collected while the part is sealed by the collection container.
Since it is possible to do and throw in,
Prevents the collected or input developer from scattering around
Wear. Further, the above-mentioned jogo has a developer recovery container.
The developer flowing down from the exchange port is stored in the storage container.
To completely prevent the developer from spilling or spilling outside.
You can stop. Further, in particular, the rotary development according to claim 5.
According to the device, the jogo member and the recovery container are in phase with each other.
Develop because they slide on each other and they are easy to put on and take off
It is possible to shorten the work time for agent exchange. Also especially
According to the rotary developing device of claim 6, the above-mentioned jogo member and
Make the above-mentioned collection container an appropriate positional relationship with each other
When joining so that the recovery container,
And provided in at least one of the above collection containers
Slide the regulating member until it comes into contact with the jogo member.
To ensure proper positional relationship with each other.
You can For this reason, it is possible to reliably and reliably
The material and the collection container can be set. Also special
According to the rotary developing device of claim 7, the recovered current
The image agent is moved from the collection position of the developing unit to the developer loading position.
In the circumferential direction of the developing device unit and
To the developer accumulating part located away from the opening of the collection container
Therefore, there is no developer near the opening of the recovery container.
When removing the recovery container from the jogo member,
It is possible to prevent the developer from scattering around, and work for replacing the developer.
You can improve your sex. In particular, the rotating type present invention of claim 8
According to the imaging device, the total amount of collected imaging agent is provided in the collection container.
It can be grasped by the indicator part,
Comparison with the amount of agent
It is a guide for estimating the amount of the agent. That is, the worker is the developer
Development that is magnetically held on the development sleeve during recovery
To collect the agent, use the jig or hand to connect the development input gear.
Rotate the developing roller and the upper / lower transport screw to rotate.
Let At this time, usually the worker has collected all the developer?
I don't know whether or not, but I put it in the collection container before
By marking the amount of developer
If the developer is collected near the mark, the collection is almost completed.
You can know the state. This allows the worker
The development input gear no longer rotates more than necessary
Therefore, the workability of developer replacement can be improved. Also special
According to the rotary type developing device of claim 9,
The elastic member is provided on the sliding surface of the member and the recovery container.
Since there is no gap, the current
The developer can be prevented from leaking and the developer can be scattered around.
There is no. Further, the jogo member is made of the low friction coefficient material.
Since it will move while making contact with the
Can be easily removed. Due to these things, the developer replacement
It is possible to improve the workability. Moreover, in particular,
According to the transfer type developing device, the elastic seal member prevents
At least one edge in the longitudinal direction of the mounted sliding portion is
It is sealed by a flexible sealing member,
When joining the member and the recovery container, the elastic seal member
Does not peel off from the above edge. others
Therefore, the elastic seal member is properly attached to the collection container.
In this state, it can be joined to the jogo member. Also special
According to the rotary developing device of claim 11, the developer exchange is performed.
Sometimes when applying a drive to the drive system from the outside, a knob with a knob
By holding the knob and rotating the rolling element,
Since the holding body can be easily driven, it is possible to replace the developer.
Workability can be improved. In particular, the claim 12
According to the transfer type developing device, when the developer is collected, the developing device unit is used.
The knit knits the above-mentioned collection container to collect the developer with good recoverability.
Since it stops at the position, it stabilizes without using other rotation stopping means.
Recovery work can be performed, improving the workability of developer replacement.
Can be turned on.

[Procedure amendment 37]

[Document name to be amended] Statement

[Correction target item name] 0090

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[Procedure amendment 38]

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[Procedure amendment 39]

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[Procedure amendment 40]

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[Procedure Amendment 41]

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[Procedure amendment 42]

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[Procedure amendment 43]

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[Procedure correction 44]

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[Procedure amendment 45]

[Document name to be amended] Statement

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[Correction method] Delete

[Procedure correction 46]

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[Procedure amendment 47]

[Document name to be amended] Statement

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[Correction method] Delete

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G03G 15/01 G03G 15/01 113Z 113 21/00 530 21/00 530 15/08 507C (72) Inventor Katsuhiro Kosuge 1-3-6 Nakamagome, Ota-ku, Tokyo F-term in Ricoh Co., Ltd. (reference) 2H027 JA03 JA11 JC06 JC15 2H077 AA14 AA25 AA31 AA33 BA01 BA03 BA08 CA12 CA19 FA21 GA13 2H171 FA02 FA03 FA04 FA09 FA10 FA26 FA28 GA01 GA GA29 JA24 JA29 JA34 JA40 JA45 JA46 JA48 JA52 KA06 LA03 LA08 QA02 QA05 QA08 QA24 QB34 QB35 QB37 QB38 UA12 UA20 WA02 WA07 2H300 EA06 EA07 EA08 EA17 EJ17 EJ02EJ60 EJ02 EJ05 EJ05 EJ05 EF05 EJ05 EF05 EJ02 EF02 EJ02 EF03 EF02 EF03 EF02 EF03 EF02 EF02 EF02 EF03 EF02 EF03 EF02 EF02 EF02 EF02 EF02 EF02 GG11 HH12 HH23 HH32 HH35 MM01 MM30

Claims (13)

[Claims] 1. A developing device unit having a plurality of developing devices arranged around a rotation center line is rotated about the rotation center line to move an arbitrary developing device to a developing position facing a latent image carrier. In the rotary type developing device for performing development, a hollow member having a hollow portion around the center line communicating with the outside is provided, and the plurality of developing devices are adjacent to each other by a partition wall radially extending from the peripheral wall of the hollow member. A rotary developing device, characterized in that a casing wall common to the developing devices is formed, and the hollow member and the partition wall are formed of a material having good thermal conductivity. 2. A developing device unit having a plurality of developing devices arranged around a rotation center line is rotated about the rotation center line to bring an arbitrary developing device to a development position facing a latent image carrier. In a rotary developing device for moving and developing, an exchange port for exchanging the developer contained therein is formed for each of the plurality of developing devices, and the developing device unit is provided with each developing device. A rotary developing device, which is configured to be rotatable so as to selectively take a developer collecting position in which the exchange port faces downward and a developer input position in which the exchange port faces upward. 3. The rotary developing device according to claim 2, wherein the structure near the exchange port is configured so that the jogo member can be attached and detached. 4. The exchange port is provided separately from an opening formed in each developing device for exposing a part of the developer carrying member for supplying the developer to the latent image carrying member. The rotary developing device according to claim 2. 5. The rotary developing device according to claim 3, wherein the jogo member includes a recovery container having an opening connectable to the opening thereof. 6. The rotary developing device according to claim 5, wherein the jogo member and the recovery container are configured to be connectable to each other by sliding. 7. The sliding movement of the joug member and the collection container to at least one of the joug member and the collection container is regulated beyond an appropriate positional relationship between the joug member and the collection container. 7. The rotary developing device according to claim 6, further comprising a regulating member for controlling the rotation developing device. 8. The developer collected from the opening is collected in the collecting container portion apart from the opening of the collecting container in the circumferential direction of the developing device unit from the developer collecting position of the developing device unit. The rotary developing device according to claim 5, 6 or 7, wherein a developer accumulating portion that accumulates with the rotation of is formed. 9. The rotary developing device according to claim 5, wherein the collection container is provided with an index portion corresponding to the total amount of the developer to be collected. 10. An elastic seal member having a surface having a relatively small coefficient of friction is provided on at least one of the surfaces of the jogo member and the recovery member in a sliding portion between the jogo member and the recovery member. The surface is provided so as to be a sliding surface with respect to the other surface.
6, 7, 8 or 9 rotary developing device. 11. The rotary developing device according to claim 10, wherein the elastic seal member is provided so as to cover an edge of the joint surface covered by the elastic seal member on the upstream side in the sliding direction. 12. A rotary body included in a drive system for driving a developer carrier for supplying a developer to the latent image carrier is provided with a knob. 4,
5, 6, 7, 8, 9, 10 or 11 rotary developing device. 13. The recovery container is used as a rotation stop member for stopping the rotation of the developing device unit, 5, 6, 7, 8, 9, 10, 11 or 12.
Rotary developing device.