JP4600055B2 - Developing device, image forming apparatus, image forming system, and method for assembling developer supply roller - Google Patents

Description

  The present invention relates to a developing device, an image forming apparatus, and a method for assembling a developer supply roller.

  As a developing device that develops using a developer, a developing device that includes a developer supply roller that supplies the developer to the developer carrying member for carrying and transporting the developer contained in the developer containing member. It is known (see, for example, Patent Document 1).

The developer supply roller included in such a developing device is provided in the developer container not containing the developer, but the power for rotating the developer supply roller is provided outside the developing device. A gear for transmitting power from a driving source such as a motor is fixed to the shaft body of the developer supply roller outside the developer container. In order to prevent relative positions of the gear and the developer supply roller in the circumferential direction, for example, a pin is inserted into a pin hole provided in the diameter direction of the shaft body, and the pin inserted into the shaft body is inserted into the gear. It is fixed by being accommodated in the provided pin accommodating portion. That is, first, a gear is inserted from the outside into a developer supply roller that protrudes from the inside to the outside of the developer container, and the gear is positioned on the developer container side from a pin hole provided in the shaft body. And after inserting a pin into a pin hole, a gear is moved to the place where a pin is located in the pin accommodating part provided inside the gear. Thereafter, an E-ring or the like is fitted into a groove provided in the shaft body so as to be positioned on the developer container side of the gear so that the gear does not move in the axial direction, and the gear is fixed.
JP 2004-86059 A

  Such a developing device is used by being mounted on an image forming apparatus that forms an image using a developer. However, since the image forming apparatus is required to be downsized, the development mounted on the image forming apparatus is used. The apparatus is also required to be downsized.

  However, as described above, in order to fix the gear to the developer supply roller, the gear is temporarily moved from the fixed position after assembly to the developer container side, inserted into the pin hole, and then returned to the fixed position after assembly. ing. For this reason, a space that is used only for assembling the gear to the developer supply roller and is not necessary when used as a developing device is secured, so that the developing device becomes large.

  The present invention has been made in view of such a problem, and an object of the present invention is to develop a developing device that is miniaturized by reducing a useless space used only for assembling the developing device, and the developing device. An image forming apparatus, an image forming system, and a developer supply roller assembling method.

  A main aspect of the present invention is a developer container for accommodating a developer, a developer carrier for carrying and transporting the developer, and a roller portion that has elasticity and is accommodated in the developer container. And a shaft body having a pin hole through which a pin is inserted into a portion protruding to the outside of the developer container, and supported on the developer container. The developer supply roller for supplying the agent, the shaft body and the pin inserted through the shaft body are allowed to move in the axial direction of the shaft body, and the shaft body is allowed to move in the rotational direction. A developing device having a pin accommodating portion that communicates with the outside, and a gear that is rotated together with the developer supply roller, wherein the roller portion is the developer. The developer supply to the developer container without interfering with the container. With the roller supported, the roller is covered with the gear, the developer supply roller is moved in the axial direction, and the roller portion interferes with the developer container and is elastically deformed, so that the outer side of the gear. The developing device is exposed and can be inserted and removed.

  Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  At least the following will be made clear by the description of the present specification and the accompanying drawings.

  A developer container for containing the developer, a developer carrier for carrying and transporting the developer, a roller portion having elasticity and housed in the developer container, and the developer container And a shaft body having a pin hole through which a pin is inserted in a portion protruding to the outside of the developer container, and for supplying the developer to the developer carrier. The developer supply roller, and the shaft body and the pin inserted through the shaft body to allow relative movement in the axial direction of the shaft body and to limit relative movement in the rotation direction of the shaft body, And a gear that rotates together with the developer supply roller. The pin hole has a roller portion that interferes with the developer container. Without the developer supply roller being supported by the developer container. In this state, it is covered with the gear, the developer supply roller is moved in the axial direction, and the roller portion is elastically deformed by interfering with the developer container, thereby being exposed to the outside of the gear. A developing device characterized in that a pin can be inserted and removed.

  According to such a developing device, the developer supply roller is moved in the axial direction and the roller portion interferes with the developer container and is elastically deformed, so that the pin hole is exposed to the outside of the gear and the pin is inserted and removed. Therefore, it is possible to insert the pin into the exposed pin hole by causing the roller portion of the developer supply roller to interfere with the developer container and elastically deform it. Further, the developer supply roller through which the pin is inserted is supported by the developer container without the roller part interfering with the developer container, that is, the developer supply roller is rotatably supported. In this case, since the pin hole is covered with the gear, the pin inserted into the pin hole is accommodated in the pin accommodating portion of the gear. For this reason, when the developer supply roller is in a rotatable state, the relative movement of the gear and the shaft body in the rotational direction is restricted, and the developer supply roller is rotated by the power transmitted by the gear. Is possible. At this time, when the gear is attached to the developer supply roller, if the developer supply roller is rotatable, the pin hole covered with the gear is elastically deformed to move the developer supply roller in the axial direction. Since the shaft is exposed to the outside by being moved, if the shaft body has a length that allows the gear to be attached, no further length is required. That is, since the gear is not moved to expose the pin hole formed in the shaft body to the outside of the gear, there is no need to provide a space for moving the gear that is necessary only during assembly. For this reason, since the length of a shaft can be shortened, it is possible to reduce the size of the developing device.

In the developing device, the developer supply roller is supported by the developer container via a bearing, and the gear includes the developer container without the roller portion interfering with the developer container. It is desirable that the axial movement is restricted by the bearing while the developer supply roller is supported.
According to such a developing device, since the movement of the gear can be regulated by the bearing without separately providing a member for regulating the movement of the gear in the axial direction, there is a space including a member for regulating. There is no need, and the developing device can be further downsized. Further, since it is not necessary to provide a separate member only for restricting the movement of the gear in the axial direction, the number of parts is reduced, and the number of assembly steps is also reduced, so that the cost can be reduced.

In such a developing device, the movement of the developer supply roller in the axial direction is restricted in a state where the developer supply roller is supported by the developer container without the roller unit interfering with the developer container. It is desirable to have a movement restricting member.
According to such a developing device, since the movement restricting member is provided, the developer supply roller is supported by the developer container without the roller portion of the developer supply roller interfering with the developer container. It is possible to maintain the state. That is, even if the developer supply roller is driven and an external force generates a force acting in a direction that moves the developer supply roller in the axial direction, the movement of the developer supply roller is restricted by the movement restricting member. The state in which the roller portion is supported by the developer container can be maintained without interfering with the developer container.

In such a developing device, an axial distance between the roller portion and the developer container in a state where the developer supply roller is supported by the developer container is shorter than a length of the pin container in the axial direction. It is desirable.
According to such a developing device, in a state where the developer supply roller is supported by the developer container, the axial distance between the roller portion and the developer container is shorter than the axial length of the pin container. Therefore, even if the developer supply roller moves in the axial direction in a state where the developer supply roller is supported by the developer container, the pin does not come out of the pin housing portion. For this reason, in a state where the developer supply roller is supported by the developer container, the pin does not come off from the shaft body, and the developer supply roller can be reliably rotated by the power transmitted by the gear. is there.

In such a developing device, the developer supply roller is moved in the axial direction so that the roller portion can move when the roller portion interferes with the developer accommodating body and is elastically deformed. It is desirable that the length be longer than
According to such a developing device, the distance at which the developer supply roller can move when the roller portion interferes with the developer accommodating body and is elastically deformed is longer than the length in the axial direction of the pin accommodating portion. By moving the developer supply roller in the axial direction by elastically deforming the roller portion, it is possible to position the pin hole located in the pin housing portion outside the pin housing portion.

For this reason, it is possible to easily attach the gear to the shaft body so that the pin is easily inserted into the pin hole and the relative movement of the shaft body in the rotational direction with respect to the gear is limited.

In such a developing device, it is desirable that the roller portion be formed of urethane foam.
According to such a developing device, urethane foam has a large shrinkage rate, and therefore can be easily elastically deformed greatly when the developer supply roller is moved in the axial direction. For this reason, it is possible to easily attach the gear to the shaft body.

In such a developing device, the developer container is configured to allow the roller portion to enter between the interference portion that interferes with the roller portion and the bearing when the developer supply roller is moved in the axial direction. It is desirable to have a gap.
According to such a developing device, when the developer supply roller is moved in the axial direction, the roller portion can be easily elastically deformed by causing the roller portion to interfere with the interference portion, and can interfere with the bearing. The developer supply roller can be easily moved in the axial direction by accommodating the elastically deformed portion of the roller portion in a gap provided between the developer portion and the roller.

In such a developing device, it is desirable that the interference portion is chamfered.
According to such a developing device, since the interference portion with which the roller portion interferes when the developer supply roller is moved in the axial direction is chamfered, a sharp edge or the like does not contact the roller portion, and the roller portion It is possible to prevent the roller portion from being damaged when the is elastically deformed.

A developer container for containing the developer; a developer carrier for carrying and transporting the developer; an elastic roller portion housed in the developer container; And a shaft body having a pin hole through which a pin is inserted in a portion protruding to the outside of the developer container, and supplying the developer to the developer carrier. For permitting relative movement of the shaft body and the pin inserted through the shaft body in the axial direction of the shaft body and restricting relative movement of the shaft body in the rotational direction. A developing device having a pin accommodating portion communicating with the outside and a gear rotated together with the developer supply roller, wherein the roller portion is connected to the developer accommodating body. The developer supply roller is placed on the developer container without interference. The developer supply roller is covered with the gear while being held, and the developer supply roller is moved in the axial direction so that the roller portion is elastically deformed by interfering with the developer container, thereby being exposed to the outside of the gear. The pin can be inserted / removed, and the developer supply roller is supported by the developer container via a bearing, and the gear does not interfere with the developer container. In the state where the developer supply roller is supported by the developer container, the axial movement is restricted by the bearing, and the roller portion does not interfere with the developer container and does not interfere with the developer container. A movement regulating member for regulating movement of the developer supply roller in the axial direction in a state where the developer supply roller is supported, and the developer supply roller is supported by the developer container. The present The axial distance between the developer supply roller and the developer container is shorter than the length of the pin container in the axial direction, and the developer supply roller is moved in the axial direction so that the roller part is the developer container. The distance that can be moved by being elastically deformed by interfering with the roller is longer than the length in the axial direction of the pin accommodating portion, the roller portion is formed of foamed urethane, and the developer accommodating body is An interference portion that interferes with the roller portion when the developer supply roller is moved in the axial direction, and a gap for the roller portion to enter between the bearings, the interference portion, The developing device is chamfered.
According to such a developing device, all of the above-described effects can be obtained, so that the object of the present invention can be achieved most effectively.

Also, (a) an image carrier that carries a latent image, (b) a developer container that contains the developer, a developer carrier that carries and transports the developer, and has elasticity. And a shaft having a roller hole accommodated in the developer accommodating body and a pin hole that is rotatably supported by the developer accommodating body and into which a pin is inserted into a portion protruding to the outside of the developer accommodating body. A developer supply roller for supplying the developer to the developer carrier, and allowing the shaft and the pin inserted through the shaft to move relative to each other in the axial direction of the shaft. And a gear housing that has a pin accommodating portion that communicates with the outside and restricts relative movement in the rotational direction of the shaft body, and a gear that is rotated together with the developer supply roller. The pin hole is formed so that the roller portion does not interfere with the developer container. With the developer supply roller supported by the developer container, the developer supply roller is covered with the gear, the developer supply roller is moved in the axial direction, and the roller part interferes with the developer container and elastically deforms. Thus, the image forming apparatus includes a developing device that is exposed to the outside of the gear and from which the pin can be inserted and removed.
According to such an image forming apparatus, it is possible to reduce the size of the image forming apparatus by using a downsized developing device.

  (A) a computer; and (B) an image forming apparatus connected to the computer and having the following (a) and (b): (a) an image carrier that carries a latent image; and (b) ) A developer container for containing the developer, a developer carrier for carrying and transporting the developer, a roller portion having elasticity and housed in the developer container, and the developer container And a shaft body having a pin hole through which a pin is inserted in a portion protruding to the outside of the developer container, for supplying the developer to the developer carrier. A developer supply roller, the shaft body, and the pin inserted through the shaft body are allowed to move relative to the shaft body in the axial direction and limit the relative movement of the shaft body in the rotation direction. It has a pin receiving portion that communicates with the developer supply roller. The pin hole is formed in a state where the developer supply roller is supported by the developer container without the roller part interfering with the developer container. The developer supply roller is moved in the axial direction and the roller portion is elastically deformed by interference with the developer container, so that it is exposed to the outside of the gear and the pin can be inserted and removed. An image forming system including a developing device (C) can also be realized.

  In addition, the shaft body is provided with a roller portion having elasticity, and the shaft body is supported by a developer container that houses the developer, and the developer is carried on the developer carrying body for carrying and transporting the developer. The shaft body is inserted by inserting a developer supply roller for supplying toner into the developer container, and elastically deforming the roller part by causing the roller part and the developer container to interfere with each other. And a gear that rotates together with the developer supply roller is inserted into the projected shaft body from the outside of the developer container, and the gear and the shaft Exposing a pin hole provided in the shaft body to the outside of the gear for inserting a pin for fixing the body, inserting the pin into the exposed pin hole, and Move the developer supply roller in the axial direction And a pin housing provided on the gear and communicated to the outside by allowing the developer container to rotatably support the developer supply roller without interfering with the developer container. And a step of housing the pin in a portion and fixing the gear to the developer supply roller.

  According to such a method for assembling the developer supply roller, it is not necessary to move the gear only to expose the pin hole when the gear is attached to the developer supply roller, so the length of the shaft body is shortened. The pin hole can be easily exposed to the outside of the gear by moving the developer supply roller having a short shaft length in the axial direction, and after inserting the pin into the pin hole The developer supply roller is moved to a position where the roller portion and the developer container do not interfere with each other, so that the developer supply roller can be easily assembled to the developer container and the miniaturized developing device is easily assembled. It is possible.

=== Overview of Image Forming Apparatus ===
A configuration example and operation of a laser beam printer (hereinafter also referred to as a printer) 10 as an example of an image forming apparatus that forms an image using a developing device as a developing apparatus according to the present invention with reference to FIGS. An example will be described. FIG. 1 is a diagram showing main components constituting the printer 10, and FIG. 2 is a diagram for explaining a configuration of a control unit provided in the printer 10. In FIG. 1, the vertical direction is indicated by arrows. For example, the paper feed tray 92 is disposed at the lower part of the printer 10, and the fixing unit 90 is disposed at the upper part of the printer 10.

<Configuration of Printer 10>
As shown in FIG. 1, the printer 10 includes a charging unit 30, an exposure unit 40, a developing device holding unit 50, and a primary transfer unit along the rotation direction of a photoconductor 20 as an example of an image carrier that carries a latent image. 60, an intermediate transfer body 70, and a cleaning unit 75, and further controls a secondary transfer unit 80, a fixing unit 90, a display unit 95 formed of a liquid crystal panel as a means for notifying a user, and these units. It has a control unit 100 that controls the operation as a printer.

  The photoreceptor 20 has a cylindrical conductive substrate and a photosensitive layer formed on the outer peripheral surface thereof, and is rotatable around a central axis. In the present embodiment, the photoreceptor 20 is indicated by an arrow in FIG. Rotate clockwise.

  The charging unit 30 is a device for charging the photoconductor 20, and the exposure unit 40 is a device for forming a latent image on the photoconductor 20 charged by irradiating a laser. The exposure unit 40 includes a semiconductor laser, a polygon mirror, an F-θ lens, and the like, and charges the modulated laser based on an image signal input from a host computer (not shown) such as a personal computer or a word processor. The irradiated photoconductor 20 is irradiated.

  The developing device holding unit 50 converts the latent image formed on the photoconductor 20 into toner T as an example of a developer contained in developing devices 51, 52, 53, and 54 as an example of a developing device, that is, black. Black (K) toner contained in the developing device 51, magenta (M) toner contained in the magenta developing device 52, cyan (C) toner contained in the cyan developing device 53, and yellow contained in the yellow developing device 54 (Y) An apparatus for developing using toner.

  In the present embodiment, the developing device holding unit 50 is capable of moving the positions of the four developing devices 51, 52, 53, and 54 by rotating. That is, the developing device holding unit 50 holds the four developing devices 51, 52, 53, and 54 by the four attaching / detaching portions 50a, 50b, 50c, and 50d, and the four developing devices 51, 52, and 53 are provided. , 54 can rotate around the central axis 50e while maintaining their relative positions. Each time the photosensitive member 20 rotates once, one of the four developing devices 51, 52, 53, 54 is selectively opposed to the photosensitive member 20, and the opposed developing devices 51, 52, 53, 54, The latent image formed on the photoconductor 20 is developed with the toner contained in the toner 54. Details of each developing device will be described later.

  The primary transfer unit 60 is a device for transferring a single color toner image formed on the photoconductor 20 to the intermediate transfer body 70. When four color toners are sequentially transferred in a superimposed manner, the full color toner is transferred to the intermediate transfer body 70. An image is formed. The intermediate transfer member 70 is an endless belt, and is driven to rotate at substantially the same peripheral speed as the photosensitive member 20. The secondary transfer unit 80 is a device for transferring a single color toner image or a full color toner image formed on the intermediate transfer body 70 to a recording medium such as paper, film, or cloth.

  The fixing unit 90 is a device for fusing a single color toner image or a full color toner image transferred onto a recording medium onto a recording medium such as paper to form a permanent image. The cleaning unit 75 is provided between the primary transfer unit 60 and the charging unit 30 and has a rubber cleaning blade 76 that is in contact with the surface of the photoconductor 20. The cleaning unit 75 is disposed on the intermediate transfer body 70 by the primary transfer unit 60. After the toner image is transferred, the toner T remaining on the photoconductor 20 is scraped off and removed by the cleaning blade 76.

  As shown in FIG. 2, the control unit 100 includes a main controller 101 and a unit controller 102. An image signal is input to the main controller 101, and the unit controller 102 responds to an instruction based on the image signal. The unit is controlled to form an image.

The main controller 101 is connected to a host computer via an interface 112, and includes an image memory 113 for storing an image signal input from the host computer, a CPU 111 for controlling the entire printer 10, and the like.
The unit controller 102 includes a CPU 120, a memory 116 such as a RAM and a ROM, and units of the apparatus main body (charging unit 30, exposure unit 40, primary transfer unit 60, cleaning unit 75, secondary transfer unit 80, fixing unit 90, The display unit 95) and each drive control circuit for driving and controlling the developing device holding unit 50 are controlled, and each unit is controlled based on a signal input from the main controller 101.

<Operation of Printer 10>
Next, the operation of the printer 10 will be described with reference to other components.
First, when an image signal from a host computer (not shown) is input to the main controller 101 of the printer 10 via the interface (I / F) 112, the photosensitive device is controlled by the unit controller 102 based on a command from the main controller 101. The developing roller 510 and the intermediate transfer member 70 provided on the body 20, the developing devices 51, 52, 53, and 54 rotate. The photoconductor 20 is charged by the charging unit 30 at the charging position while rotating.

The charged area of the photoconductor 20 reaches the exposure position as the photoconductor 20 rotates, and a latent image corresponding to image information of the first color, for example, yellow Y, is transferred to the charged area by the exposure unit 40. It is formed. On the other hand, the developing device holding unit 50 positions the yellow developing device 54 containing yellow (Y) toner at a developing position facing the photoconductor 20.
The latent image formed on the photoconductor 20 reaches the development position as the photoconductor 20 rotates, and is developed with yellow toner by the yellow developing device 54. As a result, a yellow toner image is formed on the photoreceptor 20.
The yellow toner image formed on the photoconductor 20 reaches the primary transfer position as the photoconductor 20 rotates, and is transferred to the intermediate transfer body 70 by the primary transfer unit 60. At this time, a primary transfer voltage having a polarity opposite to the charging polarity of the toner is applied to the primary transfer unit 60. During this time, the secondary transfer unit 80 is separated from the intermediate transfer member 70.

By repeating the above processing for the second color, the third color, and the fourth color, the four color toner images corresponding to the respective image signals are transferred onto the intermediate transfer body 70 in an overlapping manner. . As a result, a full color toner image is formed on the intermediate transfer member 70.
The full-color toner image formed on the intermediate transfer body 70 reaches the secondary transfer position as the intermediate transfer body 70 rotates, and is transferred to the recording medium by the secondary transfer unit 80. The recording medium is conveyed from the paper feed tray 92 to the secondary transfer unit 80 via the paper feed roller 94 and the registration roller 96. When performing the transfer operation, the secondary transfer unit 80 is pressed against the intermediate transfer body 70 and a secondary transfer voltage is applied.
The full color toner image transferred to the recording medium is heated and pressurized by the fixing unit 90 and fused to the recording medium. On the other hand, after the primary transfer position has elapsed, the toner remaining on the surface of the photoreceptor 20 is scraped off by the cleaning blade 76 to prepare for charging for forming the next latent image. The toner scraped off is collected in a waste toner container.

=== Overview of Developer ===
Next, a configuration example of the developing device will be described with reference to FIGS. FIG. 3 is a perspective view of the developing device. FIG. 4 is a cross-sectional view showing the main components of the developing device. FIG. 5 is a perspective view showing a state where the toner supply roller 550 is attached to the housing 540. Note that the cross-sectional view shown in FIG. 4 shows a cross section of the developing device cut along a plane perpendicular to the longitudinal direction shown in FIG. 4, the vertical direction is indicated by arrows as in FIG. 1. For example, the central axis of the developing roller 510 is below the central axis of the photoconductor 20. In FIG. 4, the yellow developing device 54 is shown in a state where the yellow developing device 54 is located at a developing position facing the photoconductor 20.

  The developing device holding unit 50 includes a black developing device 51 containing black (K) toner, a magenta developing device 52 containing magenta (M) toner, a cyan developing device 53 containing cyan (C) toner, and yellow. (Y) Although the yellow developing unit 54 containing toner is provided, the configuration of each developing unit is the same, so the yellow developing unit 54 will be described below.

<Configuration of Yellow Developer 54>
The yellow developing unit 54 includes a housing 540 as an example of a developer container that contains toner T, a toner supply roller 550 as an example of a developer supply roller, a development roller 510 as an example of a developer carrier, and an upper seal 520. And a regulating blade 560 and the like.

  The housing 540 is manufactured by welding an integrally molded upper housing portion 542 and lower housing portion 544 made of resin, and a toner accommodating portion 530 for accommodating the toner T is formed therein. Yes. The toner storage portion 530 is divided into two toner storage portions, that is, a first toner storage portion 530a and a second toner, by a partition wall 545 for partitioning the toner T that protrudes inwardly (in the vertical direction in FIG. 4) from the inner wall. It is divided into the accommodating portion 530b.

  The upper portions of the first toner storage portion 530a and the second toner storage portion 530b communicate with each other. In the state shown in FIG. 4, the movement of the toner T is restricted by the partition wall 545. However, when the developing device holding unit 50 rotates, the toner stored in the first toner storage portion 530a and the second toner storage portion 530b is temporarily moved to the upper communicating side of the developing position. When the toner is collected and returns to the state shown in FIG. 4, the toners are mixed and returned to the first toner storage portion 530a and the second toner storage portion 530b. That is, the toner T in the developing device is agitated by the rotation of the developing device holding unit 50. For this reason, in this embodiment, the stirring member is not provided in the toner storage portion 530, but a stirring member for stirring the toner T stored in the toner storage portion 530 may be provided. As shown in FIG. 4, the housing 540 has an opening 572 in the lower portion, and a developing roller 510 described later is provided so as to face the opening 572.

  The housing 540 is provided with fitting holes 546 and 547 in the side wall portions 540a and 540b on both ends in the longitudinal direction, respectively, and when the developing device 54 is attached to the printer 10, the housing 540 is provided on the back side of the printer 10. The first bearing 640 is fitted in the fitting hole 547 of the side wall portion 540b located, and the second bearing 620 is fitted in the fitting hole 546 of the side wall portion 540a located on the front side of the printer 10, respectively. The toner supply roller 550 is rotatably supported by the first bearing 640 and the second bearing 620. Here, the fitting hole 546 of the side wall portion 540a located on the front side of the printer 10 serves as an insertion port when the toner supply roller 550 is accommodated in the housing 540, and thus has a size substantially equal to the diameter of the roller portion 550a. Is formed. For this reason, the front-side fitting hole 546 is formed larger than the back-side fitting hole 547. Further, on the drive unit side, the seal member 650 is provided between the housing 540 and the shaft body 550b inside the first bearing 640, and on the mounting side, the seal member 650 and the second member are disposed between the second bearing 620 and the shaft body 550b. A seal member 630 is interposed between the bearing 620 and the housing 540.

  The toner supply roller 550 is provided with an elastic roller portion 550a made of, for example, foamed urethane, and a shaft body that is provided at the rotation center of the roller portion 550a, penetrates the roller portion 550a, and protrudes bidirectionally from both ends thereof. 550b. The toner supply roller 550 is supported by the housing 540 via the first bearing 640 and the second bearing 620 on both ends of the shaft body 550b, so that the toner supply roller 550 is rotatably supported around the shaft body 550b. The shaft body 550b of the toner supply roller 550 extends longer than the first bearing 640 in the mounting direction when the developing device 54 is mounted on the printer 10, and drives the toner supply roller 550 to the extended portion. A gear 660 is provided to transmit power for the purpose. The gear 660 is fixed to the shaft body 550b by a pin 670 inserted through a pin hole 550c provided in the shaft body 550b. A fixing method and a fixing structure between the shaft body 550b and the gear 660 will be described later.

  The roller portion 550a is accommodated in the first toner accommodating portion 530a (inside the housing 540) of the housing 540, and supplies the toner T accommodated in the first toner accommodating portion 530a to the developing roller 510. The toner supply roller 550 is provided vertically below the first toner storage portion 530a. The toner T accommodated in the first toner accommodating portion 530a is supplied to the developing roller 510 by the toner supply roller 550 below the first toner accommodating portion 530a. Further, the toner supply roller 550 peels off the excess toner T remaining on the developing roller 510 after development from the developing roller 510.

  The toner supply roller 550 and the developing roller 510 are assembled to the housing 540 while being pressed against each other. Therefore, the roller portion 550a of the toner supply roller 550 is in contact with the developing roller 510 in an elastically deformed state. The toner supply roller 550 rotates in a direction (clockwise in FIG. 4) opposite to the rotation direction of the developing roller 510 (counterclockwise in FIG. 4). The shaft body 550b is below the rotation center axis of the developing roller 510.

  The developing roller 510 carries the toner T and conveys it to a developing position facing the photoconductor 20. The developing roller 510 is made of metal and is made of an aluminum alloy such as 5056 aluminum alloy or 6063 aluminum alloy, or an iron alloy such as STKM, and is subjected to nickel plating, chrome plating, or the like as necessary. Yes.

  Further, as shown in FIG. 3, the developing roller 510 is supported at both ends in the longitudinal direction, and is rotatable about the central axis. As shown in FIG. 4, the developing roller 510 rotates in a direction (counterclockwise in FIG. 4) opposite to the rotation direction of the photoconductor 20 (clockwise in FIG. 4). The central axis is below the central axis of the photoconductor 20.

  As shown in FIG. 4, there is a gap between the developing roller 510 and the photoconductor 20 in a state where the yellow developing device 54 faces the photoconductor 20. That is, the yellow developing device 54 develops the latent image formed on the photoconductor 20 in a non-contact state. When developing the latent image formed on the photoconductor 20, an alternating electric field is formed between the developing roller 510 and the photoconductor 20.

  The upper seal 520 prevents the toner T in the yellow developing device 54 from leaking out of the device, and collects the toner T on the developing roller 510 that has passed through the developing position into the developing device without being scraped off. The upper seal 520 is a seal made of a polyethylene film or the like. The upper seal 520 is supported by a seal support sheet metal 522 and is attached to the housing 540 via the seal support sheet metal 522. A seal urging member 524 made of malt plain or the like is provided on the opposite side of the upper seal 520 from the developing roller 510 side. The upper seal 520 is developed by the elastic force of the seal urging member 524. 510 is pressed. The contact position at which the upper seal 520 contacts the developing roller 510 is above the central axis of the developing roller 510.

  The regulating blade 560 applies a charge to the toner T carried on the developing roller 510 and regulates the layer thickness of the toner T carried on the developing roller 510. The regulation blade 560 has a rubber part 560a and a rubber support part 560b. The rubber part 560a is made of silicon rubber, urethane rubber or the like, and the rubber support part 560b is a thin plate having spring properties such as phosphor bronze or stainless steel. The rubber part 560a is supported by a rubber support part 560b, and the rubber support part 560b is supported by being sandwiched between a pair of blade support metal plates 562 via the blade support metal plate 562. Is attached. Further, a blade back member 570 made of malt plane or the like is provided on the side opposite to the developing roller 510 side of the regulating blade 560.

  Here, the rubber portion 560 a is pressed against the developing roller 510 by the elastic force caused by the bending of the rubber support portion 560 b. Further, the blade back member 570 prevents the toner T from entering between the rubber support portion 560b and the housing 540, stabilizes the elastic force due to the bending of the rubber support portion 560b, and provides rubber from the back of the rubber portion 560a. The rubber portion 560 a is pressed against the developing roller 510 by urging the portion 560 a toward the developing roller 510. Therefore, the blade back member 570 improves the uniform contact property of the rubber portion 560a to the developing roller 510.

  The end of the regulating blade 560 opposite to the side supported by the blade support metal plate 562, that is, the tip is not in contact with the developing roller 510, and a portion away from the tip by a predetermined distance is the developing roller. 510 is in contact with a width. That is, the regulating blade 560 is not in contact with the developing roller 510 at the edge, but is in contact with the belly. The regulating blade 560 is disposed so that the tip thereof faces the upstream side in the rotation direction of the developing roller 510, and is in a so-called counter contact. The contact position where the regulating blade 560 contacts the developing roller 510 is below the central axis of the developing roller 510 and below the central axis of the toner supply roller 550.

<Operation of Yellow Developer 54>
In the yellow developing device 54 configured as described above, the toner supply roller 550 supplies the toner T accommodated in the toner accommodating portion 530 to the developing roller 510. The toner T supplied to the developing roller 510 reaches the abutting position of the regulating blade 560 as the developing roller 510 rotates, and when the toner T passes through the corresponding contacting position, an electric charge is applied and the layer thickness is regulated. Is done.

  The charged toner T on the developing roller 510 reaches a developing position facing the photoconductor 20 by further rotation of the developing roller 510, and a latent image formed on the photoconductor 20 under an alternating electric field at the developing position. For development. The toner T on the developing roller 510 that has passed the developing position by further rotation of the developing roller 510 passes through the upper seal 520 and is collected in the developing device without being scraped off by the upper seal 520. Further, the toner T still remaining on the developing roller 510 can be peeled off by the toner supply roller 550.

=== Fixing structure of toner supply roller and gear ===
6 is a cross-sectional view taken along line AA in FIG. 4, and FIG. 7 is a diagram illustrating a state in which the roller portion is elastically deformed and the toner supply roller is moved in the axial direction. FIG. 6 shows a state in which the toner supply roller 550 is assembled to the housing 540, and the assembly structure of the toner supply roller 550 to the housing 540 will be described with reference to FIG. In FIG. 6, the left side is the front side in the mounting direction when the developing device 54 is mounted on the printer 10, and the right side is the back side. When the developing device 54 is attached to the printer 10, the gear of the driving unit provided on the back side of the printer 10 and the gear 660 fixed to the toner supply roller 550 are configured to mesh with each other. Hereinafter, the front side when the developing device is mounted is referred to as a mounting side, and the back side is referred to as a drive unit side.

  As shown in FIG. 6, the toner supply roller 550 includes a shaft body 550 b that protrudes in the axial direction from both ends of the roller portion 550 a in a state where the roller portion 550 a is accommodated in the toner accommodating portion 530 in the housing 540. The toner container 530 is supported on the side walls 540 a and 540 b of the housing 540 via bearings 620 and 640. That is, the shaft body 550 b of the toner supply roller 550 passes through the side wall portions 540 a and 540 b of the housing 540 and protrudes from the toner storage portion 530 to the outside of the toner storage portion 530. The portion of the shaft body 550b that protrudes toward the mounting side has a length that does not protrude outward from the outer shape of the housing 540, and the drive-side portion of the shaft body 550b has a gear 660 outside the side wall portion 540b of the housing 540. It has a length that can be fixed, and has a pin hole 550c through which a pin 670 for fixing the gear 660 and the shaft body 550b is inserted.

  A gear 660 provided in the toner supply roller 550 transmits power to the toner supply roller 550 and meshes with a gear (not shown) of the developing roller 510 that is pressed. The developing roller 510 and the toner supply roller 550 are engaged with each other. It is configured to rotate in the opposite direction. As shown in FIG. 4, the developing roller 510 and the toner supply roller 550 are pressed against each other to such an extent that the toner supply roller 550 is elastically deformed. Therefore, a large load is applied when the rollers 510 and 550 are rotated. And requires a large driving force. Therefore, an oblique gear is used as a gear provided for the developing roller 510 and the toner supply roller 550. A force that moves the rollers 510 and 550 in any of the axial directions acts on the inclined gear according to the rotation direction and the inclination direction of the teeth. For this reason, the oblique gears provided on the developing roller 510 and the toner supply roller 550 have a force that moves the rollers 510 and 550 toward the back side (drive unit side) of the printer 10. Teeth are formed so as to act on. The side wall portion 540b on the drive unit side of the housing 540 is covered with the inclined gear so that the developing roller 510 and the toner supply roller 550 do not move in the axial direction due to the rotation of the inclined gear. A cover 680 is fixed as a movement restricting member for restricting the axial movement of the rollers 510 and 550 with which the ends of the shaft body 550b of 510 and the toner supply roller 550 are in contact. The end portions of the developing roller 510 and the toner supply roller 550 that are in contact with the cover 680 are provided with a hemispherical protrusion 550d at the tip in order to reduce the contact area with the cover 680.

  The gear 660 fixed to the toner supply roller 550 includes a gear portion 660a in which inclined teeth are formed and a fixing portion 660b formed in a step shape smaller than the outer diameter of the tooth tip. The fixing portion 660b is provided with a pin accommodating portion 660c in which the pin 670 inserted into the pin hole 550c of the toner supply roller 550 is accommodated in the inserted state. That is, the gear 660 has a through hole 660d through which the shaft body 550b of the toner supply roller 550 passes, and a pin hole of the toner supply roller 550 when the toner supply roller 550 and the gear 660 are relatively moved in the axial direction. In order to accommodate the pin 670 inserted through the 550 c inside the gear 660, a pin housing portion 660 c communicated with the outside of the gear 660 is provided. The pin housing portion 660c is a groove-like recess formed along a predetermined direction that passes through the center of the gear 660 and is orthogonal to the shaft body 550b, and has a width slightly larger than the diameter of the pin 670. Yes. For this reason, the shaft body 550b having the pin 670 inserted into the pin hole 550c and the gear 660 are relatively moved in the axial direction, and the toner supply roller 550 is rotated in a state where the pin 670 is accommodated in the pin accommodating portion 660c. When the pin 670 is brought into contact with the inner wall of the pin accommodating portion 660c, the relative movement in the rotational direction between the gear 660 and the shaft body 550b is restricted, and the shaft body 550b, that is, the toner supply roller 550 is moved together with the gear 660. It will be rotated. At this time, the pin accommodating portion 660c provided in the fixed portion 660b is formed so as to communicate with the outside on the side opposite to the gear portion 660a, so that the gear 660 is separated from the gear portion 660a and the pin 670. In the direction in which the gear portion 660a and the pin 670 approach each other, the relative movement is restricted by contacting the pin 670 with the bottom portion 660e of the pin housing portion 660c.

  That is, the toner supply roller 550 is regulated by the cover 680 for movement in the direction toward the drive unit in the axial direction, and is fitted in the housing 540 for movement in the direction toward the mounting side. Since the movement of the gear 660 is restricted by the first bearing 640 thus positioned, the toner in which the relative movement of the gear 660 and the shaft body 550b moving toward the mounting side in the axial direction is restricted by the pin 670. The supply roller 550 is positioned at a position where the gear 660 and the first bearing 640 come into contact with each other. In the state of being positioned as described above, that is, in the state of being supported by the housing 540 for supplying toner, the axial gap between the roller portion 550a of the toner supply roller 550 and the housing 540 is such that the roller portion 550a is in the housing 540. It is provided slightly to the extent that it does not contact the inside. In a state where the toner supply roller 550 is supported by the housing 540, the pin hole 550c formed in the shaft body 550b of the toner supply roller 550 is covered with the gear 660, and the pin 670 inserted through the pin hole 550c. Is located inside the gear 660.

  In the developing device 54 of the present embodiment, in the state where the toner supply roller 550 is supported by the housing 540, the distance a between the roller portion 550a and the housing 540 in the axial direction is the length of the pin accommodating portion 660c in the axial direction. The distance x, which is shorter than d and is movable when the toner supply roller 550 is moved in the axial direction and the roller portion 550a is elastically deformed by interference with the housing 540, is the length d in the axial direction of the pin housing portion 660c. It is configured to be longer. For this reason, even if the toner supply roller 550 is moved in the axial direction within the housing 540 without elastic deformation, the pin 670 is not exposed to the outside of the pin housing portion 660c and falls off, and the toner supply roller 550 is elastically moved. When deformed and moved in the axial direction, the pin hole 550c can be easily exposed outside the gear 660. For this reason, the gear 660 can be easily assembled to the shaft body 550b.

  Here, the pin housing portion 660c is formed by providing the fixing portion 660b separately from the gear portion 660a because the pin housing portion 660c may reduce the accuracy when the gear 660 is molded. In order to ensure the accuracy, a fixed portion is provided separately from the gear portion 660a.

  Incidentally, the toner supply roller 550 and the developing roller 510 are pressed by an opening 572 provided in the housing 540 and supported by the housing 540 as shown in FIG. The roller portion 550a of the toner supply roller 550 is formed to have a shorter axial length than the roller portion of the developing roller 510. Further, inside the side wall portions 540a and 540b of the housing 540, a seal support sheet metal 522 for fixing the upper seal 520 and the regulating blade 560 provided integrally to the housing to prevent the toner from leaking from the opening 572. Enters. Therefore, a space is formed between the roller portion 550 a of the toner supply roller 550 and the first bearing 640 fitted to the side wall portion 540 b of the housing 540. In the developing device 54 of the present embodiment, a gap 540c that is smaller than the diameter of the roller portion 550a is formed in the space between the roller portion 550a and the first bearing 640 on the axial drive portion side. A housing 540 is configured. For this reason, when the toner supply roller 550 is moved from the original assembly position of the toner supply roller 550, that is, the position where the toner supply roller 550 is supported and positioned by the housing 540 to the axial direction, the roller portion 550a and the housing 540 are moved. have a finger in the pie. When the toner supply roller 550 is further moved to the drive unit side, the roller portion 550a is elastically deformed by a portion that interferes with the housing 540, and a part of the roller portion 550a enters the gap 540c, so that the shaft body 550b is accommodated in the housing. It is possible to project the outer side of 540 longer. Hereinafter, the portion of the housing 540 that interferes with the roller portion 550a when the toner supply roller 550 is moved to the axial drive portion side is referred to as an interference portion 540d. By chamfering or chamfering the interference portion 540d, it is possible to prevent the roller portion 550a from being damaged when the roller portion 550a is brought into contact therewith.

=== Method for Assembling Toner Supply Roller to Housing ===
8A is a view showing a state in which the toner supply roller is inserted into the housing, FIG. 8B is a view showing a state in which the roller portion is elastically deformed to further protrude the shaft body, and FIG. FIG. 8D is a diagram showing a state in which the toner supply roller is instructed to the housing.

  Assembling the toner supply roller 550 to the housing 540 is performed first on the side wall portion 540a of the housing 540 in which the seal support sheet metal 522 on which the upper seal 520 and the regulating blade 560 are supported is mounted on the mounting side of the printer 10. The toner supply roller 550 is inserted into the housing 540 through the fitting hole 546 (FIG. 8A).

  Then, the portion of the shaft body 550b on the driving portion side is protruded from the fitting hole 547 of the side wall portion 540b of the housing 540 located on the driving portion side, and the inserted toner supply roller 550 is moved to the driving portion side to move the roller portion. 550a is made to interfere with the interference part 540d of the housing 540, the roller part 550a is moved to the drive part side while being elastically deformed, and the shaft body 550b is sufficiently projected outside the housing 540 (FIG. 8B).

  A first bearing 640 is inserted into the shaft body 550b that protrudes toward the drive unit of the developing device 54 and is fitted into the fitting hole 547 on the drive unit. Next, the gear 660 is inserted into the shaft body 550b that protrudes toward the drive section side from the gear section 660a side, and the pin hole 550c provided in the shaft body 550b is exposed outside the gear 660. Is moved in the bearing direction (FIG. 8C).

  Next, the pin 670 is inserted into the pin hole 550c exposed outside the gear 660, the pin 670 inserted into the pin hole 550c is received in the pin receiving portion 660c of the gear 660, and the roller portion 550a is the interference portion 540d. The toner supply roller 550 is moved to the mounting side until it is separated from the mounting side. At this time, the second bearing 620 is fitted into the fitting-side fitting hole 546, and the toner supply roller 550 is rotatably supported by the housing 540 via the first bearing 640 and the second bearing 620 (FIG. 8D). ). At this point, movement of the toner supply roller in the direction toward the mounting side is restricted.

  Finally, the cover 680 is attached to the side wall portion 540b on the drive unit side of the housing 540, so that the movement of the toner supply roller 550 in the direction toward the drive unit side is restricted.

  According to the developing device 54 of the present embodiment, when the toner supply roller 550 is assembled to the housing 540, the shaft body 550b of the toner supply roller 550 does not protrude long outside the housing 540. It is possible to make it smaller. For example, when fixing a gear to a shaft or the like with a pin, the gear inserted through the shaft is moved to a retreat position where the pin hole is exposed, the pin is inserted into the pin hole, and the gear is moved from the retreat position to the pin. When the pin is accommodated in the pin accommodating part of the gear and positioned on the side opposite to the pin accommodating part of the gear, for example, when a regulating member such as an E-ring is fitted on the shaft, the gear is arranged on the shaft. The gear must be moved between the retracted position and the fixed position in the inserted state. For this reason, if it is only for fixing the gear, it is only necessary to provide a space for the fixed position, but it is necessary to provide a retreat position only for assembling the gear to the shaft, and the shaft is provided for the provision of the retreat position. Becomes longer and the size of the developing device becomes larger. Furthermore, if an E-ring or the like is used to restrict the movement of the gear in the axial direction, a groove for fitting the E-ring into the shaft must be formed in the shaft. As the number of man-hours to assemble increases, the cost increases. Therefore, as in the above-described embodiment, the developing is performed by moving the toner supply roller 550 in the axial direction to the extent that the roller portion 550a is elastically deformed without retracting the gear 660 and the pin hole 550c is exposed to the outside of the gear 660. The structure of the container and the method of assembling the toner supply roller are excellent. Moreover, the operation | work which assembles an E ring to a shaft is performed using a specific tool, and is a complicated operation for assembling an E ring to a rotating shaft. For this reason, the structure of the developing device and the method of assembling the toner supply roller according to the above-described embodiment, which can regulate the movement of the gear by the bearing without using the E-ring, are also excellent in that the assemblability is improved.

=== Other Embodiments ===
The image forming apparatus and the like according to the present invention have been described above based on the above embodiment. However, the above embodiment of the present invention is for facilitating understanding of the present invention and limits the present invention. is not. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof.

  In the above embodiment, an example in which the printer includes a plurality of attaching / detaching portions has been described. However, a lid unit that can be closed by inserting a developing device to be attached to only one attaching / detaching portion is provided. You may be the structure provided. In the above-described embodiment, the image forming apparatus including the rotary developing device has been described as an example. However, the present invention is not limited to this. For example, the present invention can be applied to an image forming apparatus provided with a tandem developing device.

  In the above embodiment, the photoconductor as the image carrier has been described as a configuration in which the photosensitive layer is provided on the outer peripheral surface of the cylindrical conductive base material, but the present invention is not limited to this. For example, a so-called photosensitive belt configured by providing a photosensitive layer on the surface of a belt-like conductive substrate may be used.

  Further, in the above-described embodiment, as shown in FIG. 5, the developer container has a developing roller 510 (developer carrier) for carrying toner used for developing the latent image carried on the photoconductor 20. However, the present invention is not limited to this. For example, the developer container may be a cartridge that does not include the developing roller 510 and that stores toner supplied to the developing devices 51, 52, 53, and 54.

=== Configuration of Image Forming System etc. ===
Next, an image forming system according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 9 is an explanatory diagram showing an external configuration of the image forming system. The image forming system 700 includes a computer 702, a display device 704, a printer 10, an input device 708, and a reading device 710.
In this embodiment, the computer 702 is housed in a mini-tower type housing, but is not limited thereto. The display device 704 is generally a CRT (Cathode Ray Tube), a plasma display, a liquid crystal display device, or the like, but is not limited thereto. As the printer 10, the printer described above is used. In this embodiment, the input device 708 uses a keyboard 708A and a mouse 708B, but is not limited thereto. In this embodiment, the reading device 710 uses a flexible disk drive device 710A and a CD-ROM drive device 710B, but is not limited to this. For example, an MO (Magneto Optical) disk drive device or a DVD (Digital Versatile) is used. Disk) etc. may be used.

  FIG. 10 is a block diagram showing the configuration of the image forming system shown in FIG. An internal memory 802 such as a RAM and an external memory such as a hard disk drive unit 804 are further provided in a housing in which the computer 702 is housed.

  In the above description, an example in which the printer 10 is connected to the computer 702, the display device 704, the input device 708, and the reading device 710 to configure the image forming system has been described. However, the present invention is not limited to this. Absent. For example, the image forming system may include the computer 702 and the printer 10, and the image forming system may not include any of the display device 704, the input device 708, and the reading device 710.

  For example, the printer 10 may have a part of each function or mechanism of the computer 702, the display device 704, the input device 708, and the reading device 710. As an example, the printer 10 includes an image processing unit that performs image processing, a display unit that performs various displays, a recording medium attachment / detachment unit for attaching / detaching a recording medium that records image data captured by a digital camera or the like. It is good also as a structure to have.

  The image forming system realized in this way is a system superior to the conventional system as a whole system.

FIG. 2 is a diagram illustrating main components constituting the printer. 2 is a diagram for explaining a configuration of a control unit provided in the printer. FIG. It is a perspective view of a developing device. It is sectional drawing which showed the main components of the developing device. FIG. 6 is a perspective view illustrating a state where a toner supply roller is attached to a housing. It is AA sectional drawing in FIG. FIG. 4 is a diagram illustrating a state in which a roller portion is elastically deformed and a toner supply roller is moved in an axial direction. FIG. 4 is a diagram illustrating a state where a toner supply roller is inserted into a housing. It is a figure which shows the state which elastically deformed the roller part and made the shaft protrude more. It is a figure which shows the state which penetrated the bearing and the gear into the shaft. FIG. 6 is a diagram illustrating a state where a toner supply roller is instructed to a housing. 1 is an explanatory diagram showing an external configuration of an image forming system. FIG. 10 is a block diagram illustrating a configuration of the image forming system illustrated in FIG. 9.

Explanation of symbols

10 printer, 20 photoconductor, 30 charging unit, 40 exposure unit,
50 Developer holding unit, 50a, 50b, 50c, 50d Detachable part,
50e central axis, 51 black developer,
52 magenta developer, 53 cyan developer, 54 yellow developer,
60 primary transfer unit, 70 intermediate transfer member, 75 cleaning unit,
76 Cleaning blade, 80 Secondary transfer unit, 90 Fixing unit,
92 paper feed tray, 94 paper feed roller, 95 display unit, 96 registration roller,
100 control unit, 101 main controller,
102 unit controller, 111 CPU, 112 interface,
113 image memory, 116 memory, 120 CPU,
510 developing roller, 520 upper seal, 522 seal support sheet metal,
524 seal urging member, 530 toner accommodating portion, 530a first toner accommodating portion,
530b second toner container, 540 housing, 540a side wall,
540b side wall portion, 540c gap, 540d interference portion, 542 upper housing portion,
544 lower housing part, 545 partition wall, 546 fitting hole, 547 fitting hole,
550 toner supply roller, 550a roller portion, 550b shaft body, 550c pin hole,
550d protrusion, 560 regulating blade, 560a rubber part, 560b rubber support part,
562 blade support sheet metal, 570 blade backing member, 572 opening,
620 Second bearing, 630 Seal member, 640 First bearing, 650 Seal member,
660 gear, 660a gear portion, 660b fixing portion, 660c pin accommodating portion,
660d through hole, 660e bottom, 670 pin, 680 cover,
700 image forming system, 702 computer, 704 display device,
708 input device, 708A keyboard, 708B mouse, 710 reader,
710A flexible disk drive device,
710B CD-ROM drive device,
802 Internal memory, 804 hard disk drive unit, T toner

Claims (12)

A developer container for containing the developer;
A developer carrier for carrying and transporting the developer;
A roller portion that is elastic and is accommodated in the developer accommodating body, and a pin hole that is rotatably supported by the developer accommodating body and that is inserted into a portion that protrudes outside the developer accommodating body. A developer supply roller for supplying the developer to the developer carrier,
Pin housing connected to the outside for allowing relative movement in the axial direction of the shaft body and restricting relative movement in the rotational direction of the shaft body while allowing the shaft and the pin inserted through the shaft body to move in the axial direction And a gear that is rotated together with the developer supply roller,
A developing device comprising:
The pin hole is covered with the gear while the developer supply roller is supported by the developer container without the roller part interfering with the developer container.
The developer supply roller is moved in the axial direction, and the roller portion is elastically deformed by interference with the developer container, so that it is exposed to the outside of the gear and the pin can be inserted and removed. Developing device. The developing device according to claim 1,
The developer supply roller is supported on the developer container via a bearing,
The gear is restricted from moving in the axial direction by the bearing in a state where the developer supply roller is supported by the developer container without the roller part interfering with the developer container. A developing device. In the developing device according to claim 1 or 2,
A movement restricting member for restricting movement of the developer supply roller in the axial direction in a state where the developer supply roller is supported by the developer container without interfering with the developer container; A developing device comprising: The developing device according to any one of claims 1 to 3,
An axial distance between the developer supply roller and the developer container in a state where the developer supply roller is supported by the developer container is shorter than a length of the pin container in the axial direction. A developing device. The developing device according to claim 1,
The distance at which the developer supply roller is moved in the axial direction and the roller portion is elastically deformed by interference with the developer containing body is longer than the axial length of the pin containing portion. A developing device. The developing device according to any one of claims 1 to 5,
The developing device, wherein the roller portion is formed of foamed urethane. The developing device according to any one of claims 2 to 6,
The developer container has an interference portion that interferes with the roller portion when the developer supply roller is moved in the axial direction, and a gap for the roller portion to enter between the bearings. A developing device. The developing device according to claim 7,
The developing device according to claim 1, wherein the interference portion is chamfered. A developer container for containing the developer;
A developer carrier for carrying and transporting the developer;
A roller portion that is elastic and is accommodated in the developer accommodating body, and a pin hole that is rotatably supported by the developer accommodating body and that is inserted into a portion that protrudes outside the developer accommodating body. A developer supply roller for supplying the developer to the developer carrier,
Pin housing connected to the outside for allowing relative movement in the axial direction of the shaft body and restricting relative movement in the rotation direction of the shaft body while allowing the shaft and the pin inserted through the shaft body to move in the axial direction And a gear that is rotated together with the developer supply roller,
A developing device comprising:
The pin hole is covered with the gear while the developer supply roller is supported by the developer container without the roller part interfering with the developer container.
When the developer supply roller is moved in the axial direction and the roller portion is elastically deformed by interference with the developer container, it is exposed to the outside of the gear, and the pin can be inserted and removed.
The developer supply roller is supported on the developer container via a bearing,
The gear is restricted in axial movement by the bearing in a state where the developer supply roller is supported by the developer container without the roller part interfering with the developer container.
A movement restricting member for restricting movement of the developer supply roller in the axial direction in a state where the developer supply roller is supported by the developer container without interfering with the developer container; Have
The axial distance between the developer supply roller and the developer container when the developer supply roller is supported by the developer container is shorter than the length of the pin container in the axial direction.
The distance at which the developer supply roller is moved in the axial direction and the roller part is movable by being elastically deformed by interference with the developer container is longer than the length in the axial direction of the pin container part,
The roller portion is formed of urethane foam,
The developer container has an interference portion that interferes with the roller portion when the developer supply roller is moved in the axial direction, and a gap for the roller portion to enter between the bearings. And
The developing device according to claim 1, wherein the interference portion is chamfered. (A) an image carrier that carries a latent image; and
(B) a developer container for containing the developer;
A developer carrier for carrying and transporting the developer;
A roller portion that is elastic and is accommodated in the developer accommodating body, and a pin hole that is rotatably supported by the developer accommodating body and that is inserted into a portion that protrudes outside the developer accommodating body. A developer supply roller for supplying the developer to the developer carrier,
Pin housing connected to the outside for allowing relative movement in the axial direction of the shaft body and restricting relative movement in the rotation direction of the shaft body while allowing the shaft and the pin inserted through the shaft body to move in the axial direction And a gear that is rotated together with the developer supply roller,
A developing device comprising:
The pin hole is covered with the gear while the developer supply roller is supported by the developer container without the roller part interfering with the developer container.
A developing device in which the developer supply roller is moved in the axial direction and the roller portion is elastically deformed by interfering with the developer container, so that it is exposed to the outside of the gear and the pin can be inserted and removed;
An image forming apparatus. (A) a computer, and
(B) An image forming apparatus connected to the computer and having the following (a) and (b):
(A) an image carrier that carries a latent image; and
(B) a developer container for containing the developer;
A developer carrier for carrying and transporting the developer;
A roller portion that has elasticity and is accommodated in the developer accommodating body, and a pin hole that is rotatably supported by the developer accommodating body and through which a pin is inserted into a portion protruding to the outside of the developer accommodating body A developer supply roller for supplying the developer to the developer carrier,
An externally connected pin for permitting relative movement of the shaft body and the pin inserted through the shaft body in the axial direction of the shaft body and restricting relative movement of the shaft body in the rotational direction. And a gear that rotates together with the developer supply roller,
A developing device comprising:
The pin hole is covered with the gear in a state where the developer supply roller is supported by the developer container without the roller part interfering with the developer container.
A developing device in which the developer supply roller is moved in the axial direction and the roller portion is elastically deformed by interfering with the developer container, so that it is exposed to the outside of the gear and the pin can be inserted and removed;
An image forming system comprising (C). The shaft body is provided with a roller portion having elasticity, and the shaft body is supported by a developer container that contains the developer, and the developer is supplied to the developer carrier for carrying and transporting the developer. A developer supply roller is inserted into the developer container, and the roller part is elastically deformed by causing the roller part and the developer container to interfere with each other. Projecting outside the developer container,
To insert a gear that rotates together with the developer supply roller into the protruding shaft body from the outside of the developer container, and to insert a pin for fixing the gear and the shaft body, Exposing a pin hole provided in the shaft body to the outside of the gear;
Inserting the pin through the exposed pin hole;
The developer supply roller is moved in the axial direction, and the developer container is rotatably supported by the developer container without the roller part interfering with the developer container. A step of accommodating the pin in a pin accommodating portion provided and communicated to the outside and fixing the gear to the developer supply roller;
A method for assembling the developer supply roller, comprising:

Images