JP6363641B2 - Development device - Google Patents

Description

  The present invention relates to a transport unit of a developing device used in an image forming apparatus such as a copying machine, a printer, or a facsimile that employs an electrophotographic system or the like, and transports and supplies a developer with stirring in a particularly simple configuration. The present invention relates to a developing device provided with a transport unit capable of performing the above.

  2. Description of the Related Art Conventionally, in an electrophotographic image forming apparatus, a developer replenishment system is newly employed that replenishes a developer when the developer contained in the developing device is used and consumed. As the developer replenishing method, a method of replenishing the developer by replacing a developer replenishing container such as a toner bottle that is detachable from the electrophotographic image forming apparatus is used.

  For example, in Patent Document 1, two conveyance members each having a helical member attached around a rotation shaft are arranged side by side so that toner having a low charge amount due to deterioration is not accumulated in the developing device. A developing device is described which forms a developer circulation path.

  Further, in Patent Document 2, the toner is brought to the center by always maintaining the tongue-like bending direction formed on the rotating stirring blade of the stirring member that conveys the toner in the toner storage unit to the toner supply unit. A toner supply device is described.

JP-A-8-30084 JP 2010-32754 A

  However, since the developing device described in Patent Document 1 is provided with two spiral rotating members, a structure for rotating and driving each of them is required, which makes the device more complicated, larger, and higher in cost. There was a problem of inviting.

  Further, the toner supply device described in Patent Document 2 stirs toner by bringing the toner remaining at the inner end of the container closer to the center of the container. There was a problem that an image having no density unevenness could not be obtained because the agitation was impossible.

In order to solve the above problems, an object of the present invention is to provide a developing device of an image forming apparatus that can sufficiently stir the developer in the developer container in the direction of the rotation axis of the stirring member with a simple configuration. To do.

In order to achieve the above object, the present invention provides a rotary shaft member including a rotary shaft portion and a sheet member held by the rotary shaft member in a first direction along the rotary shaft of the rotary shaft member. A first developer transport portion that is a first opening that widens an opening width in the rotational radius direction of the rotary shaft member toward the first direction, and in the rotational radius direction, The first developer transport unit is disposed at a position closer to the rotation shaft and at least part of the first developer transport unit overlaps the first developer transport unit in the axial direction of the rotation shaft. Comprises a second developer conveying portion which is a second opening which conveys the developer in the opposite second direction and the opening width in the rotational radius direction increases in the second direction . A sheet member and an arrangement extending from the rotary shaft portion in the rotational radius direction. , A first reinforcing portion disposed in a region where the first developer conveying portion is provided, a first reinforcing portion that extends from the rotating shaft portion in the rotational radius direction, and the leading end is the second reinforcing portion. And a reinforcing unit including a second reinforcing portion disposed up to a region where the developer conveying portion is provided.

  According to the present invention, it is possible to provide a developing device of an image forming apparatus that can sufficiently stir the developer in the developer container in the direction of the rotation axis of the stirring member with a simple configuration.

1 is a schematic view of a developing device according to the present invention. FIG. 3 is a schematic view of the inside of a configuration in which a toner bottle is attached to a developer container as viewed from above. It is a schematic diagram which shows the opening part formed in the conveyance surface of a sheet member. FIG. 4 is a schematic diagram illustrating a developer conveying direction by the developer conveying unit of FIG. 3. It is a schematic diagram which shows the other aspect of the opening part formed in the conveyance surface of a sheet | seat member. It is a schematic diagram of the sheet | seat member by which the reinforcement member was arrange | positioned.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[First Embodiment]
(Configuration of developing device)
FIG. 1 is a schematic view of a developing device 1 according to the present invention.

  The developing device 1 is an apparatus used for an image forming apparatus such as a copying machine, a printer, or a facsimile employing an electrophotographic system. A developer container 2 as a developer container is a development containing a magnet for carrying and transporting a developer for visualizing an electrostatic latent image formed on the surface of a photosensitive drum (not shown) as an image carrier. It has a developing roll 3 as an agent carrier.

  The developing device 1 also charges the toner 8 as a developer and regulates the toner layer formed on the surface of the developing roll 3, and a toner conveying member 5 that supplies the toner 8 to the developing roll 3. ,have. Further, the developer container 2 is provided with a transport unit 6 for transporting the toner 8 to the toner transport member 5 as a member for transporting the developer in the developer accommodating portion.

  The toner bottle 7 is a developer replenishment section that is detachable from the developer container 2. The developer replenishment section contains the magnetic one-component toner 8 and replenishes the developer container 2 with the toner 8. The toner supply port 9 is an opening. Further, the toner bottle 7 has a stirring member 10 that can rotate inside thereof. The stirring member 10 supplies the toner 8 of the toner bottle 7 to the developer container 2 through the toner supply port 9. The supplied toner 8 is transported to the developing roll 3 side while being stirred by a transport unit 6 that rotates inside the developer container 2.

  FIG. 2 is a schematic diagram for explaining a plurality of developer conveying means included in the conveying unit 6. A toner bottle 7 is attached to the developer container 2 so that the toner replenishing port 9 and the conveying unit 6 can face each other. It is the schematic diagram which looked at the inside of a structure from the upper part.

  The transport unit 6 includes a rotation shaft member 12 extending along the same direction as the rotation axis direction of the developing roll 3, a side perpendicular to the rotation shaft member 12, and a side in the axial direction of the rotation shaft member 12. A sheet member 14 having a conveying surface 13 having The sheet member 14 is attached to the rotary shaft member 12 and is provided so as to be rotatable around the rotary shaft member 12 inside the developer container 2 which is a developer accommodating portion. Then, by the rotational movement of the sheet member 14, the toner 8 whose developer is on the rotating end side of the sheet member 14 is conveyed from the developer container 2 to the developing roll 3 side.

  Further, the sheet member 14 has developer conveying means 15 and 16 for conveying the toner 8 in the axial direction of the rotating shaft member 12 between the rotation center side end in the rotation radius direction and the rotation leading end side end. ing. When the number of the sheet members 14 is one, a load acts on the same portion in the axial direction at the same time. However, the load can be distributed by using a plurality of sheet members 14.

  As the sheet member 14, the first sheet member 141 as the first conveying member and the second conveying member as the second conveying member are provided with different rotation angles around the rotating shaft member 12 with respect to the rotating shaft member 12. Two sheets of the sheet member 142 are disposed. By arranging the plurality of sheet members 14 with the same rotation angle difference around the rotation shaft member 12, the load in the rotation direction can be more evenly distributed.

  Further, the first sheet member 141 and the second sheet member 142 are arranged on the rotary shaft member 12 so as to be shifted in the axial direction of the rotary shaft member 12 so as to have a positional relationship that does not overlap with respect to the rotational direction of the rotary shaft member. It is installed. The respective sheet members 141 and 142 are disposed so that the axially central ends of the two sheet members 141 and 142 face the toner supply port 9.

  In the developer container 2, toner 8 that is transported from the toner supply port 9 to the toner transport member 5 is stored below the rotation shaft member 12 of the transport unit 6. Further, on the conveyance surface 13 of each sheet member 141, 142, the rotation shaft 12 rotates around the rotation shaft member 12 from the toner replenishment port 9 toward the toner conveyance member 5 through the inside of the developer container 2. A plurality of developer conveying means for conveying and moving the toner along the axial direction of the member 12 is provided.

(Configuration of developer conveying means)
As the plurality of developer conveying means, the first developing that extends along the axial direction of the rotary shaft member 12 on the conveying surfaces 13 of the first sheet member 141 and the second sheet member 142, respectively. A developer conveying means 15 and a second developer conveying means 16 are formed. The first developer conveying means 15 of the two sheet members 141 and 142 are arranged adjacent to the rotation front end side in the rotational radius direction of the rotating shaft member 12 relative to the second developer conveying means 16, respectively. Has been.

  The first developer conveying means 15 and the second developer conveying means 16 each have a plurality of predetermined openings 17 arranged in a row on the developer conveying surface 13 of the sheet member 14 as described below. ing. Thereby, the transport direction of the toner 8 by the first developer transport unit 15 and the transport direction of the toner 8 by the second developer transport unit 16 are opposite to each other with respect to the axial direction of the rotary shaft member 12. Has been.

  The opening 17 has such a shape that the size of the opening (opening width) in the direction perpendicular to the toner conveyance direction along the axial direction is increased. When the conveyance surface 13 rotates about the axis of the rotary shaft member 12, the toner 8 pushed and moved by the conveyance surface 13 passes through the opening 17 from the front side of the conveyance surface 13 toward the back side (front to rear in the rotation direction). Then, the opening 17 moves from the smaller opening width to the larger opening width. Due to the movement of the toner 8, a toner conveying force in a predetermined direction is generated. In this way, the toner 8 is pushed and moved by the conveying surface 13 in a direction in which the pressure from the toner 8 on the rotating conveying surface 13 decreases, that is, in a direction in which the opening width increases, in a predetermined direction. The toner is conveyed.

(Configuration of opening)
FIG. 3 is a schematic diagram showing the opening 17 formed on the transport surface 13 of each of the two sheet members 141 and 142 as the developer transport means.

  The opening 17 has a shape in which the apex of the triangle faces in the direction opposite to the direction in which the toner 8 is conveyed so that the opening width increases so that the pressure of the toner 8 received by the conveying surface 13 decreases (the toner 8 The shape in which the opening width increases in the transport direction). In addition, the direction of the apexes of the triangles of the plurality of openings 17 of the first developer conveying means 15 of each of the sheet members 141 and 142 and the apexes of the triangles of the plural openings 17 of the second developer conveying means 16. The directions are opposite to each other.

  Further, the opening 17 of the first developer conveying means 15 of the first sheet member 141 and the opening 17 of the first developer conveying means 15 of the second sheet member 142 are the axis of the rotary shaft member 12. The direction is the same. Similarly, the opening 17 of the second developer conveying means 16 of the first sheet member 141 and the opening 17 of the second developer conveying means 16 of the second sheet member 142 are the rotation shaft members. The twelve axial directions face the same direction.

  FIG. 4 is a schematic diagram showing the transport direction of the developer 8 by the developer transport means 15 and 16 of FIG.

  With the configuration of FIG. 3, the developer 8 transported to one end side by the first developer transport means 15 of each of the two sheet members 141 and 142 is reversed by the respective second developer transport means 16. It is conveyed so as to circulate toward the end portion side. As a result, the developer transporting units 15 and 16 form a toner transport path along the transport surface 13 of the two sheet members 141 and 142 as the transport unit 6 rotates.

  First, the toner 8 conveyed to the one end side in the axial direction of the rotating shaft member 12 by the first developer conveying means 15 along the conveying surface 13 of the first sheet member 141 is rotated next. The second developer conveying means 16 of the coming first sheet member 141 is conveyed to the center side in the axial direction. Then, the second developer conveying means 16 of the second sheet member 142 that rotates next is conveyed toward the end in the axial direction. After that, the second sheet member 142 that is rotated next is conveyed again to the center side in the axial direction by the first developer conveying means 15.

  With this configuration, it is possible to prevent the toner 8 from staying at the end of the developer container 2 and to stir the toner 8 so as to be more uniform while suppressing damage to the transport unit.

  Further, the uniform stirring state of the toner 8 which is an effect obtained in each of the above embodiments and this embodiment was confirmed by a small change in the reflection density of the toner 8 in the axial direction.

  FIG. 5 is a schematic view showing another aspect of the opening 17.

  In each of the embodiments described above, a triangular opening is used as the opening 17. However, the shape of the opening is not limited to this, and the configuration shown in FIGS. 5A to 5F may be used. Good. The shape of the opening 17 and the notch 18 formed on the conveyance surface 13 of the two sheet members 141 and 142 is the same as that in each of the above-described embodiments due to the rotation of the conveyance unit 6 inside the developer container 2. Any shape that causes 8 movements is acceptable.

  FIG. 5A is a schematic diagram illustrating a trapezoidal shape as the opening 17 instead of the triangular shape. The arrows in each drawing indicate the direction in which the toner 8 is conveyed along the axial direction of the rotary shaft member 12.

  The opening 17 has a trapezoidal shape so that the size of the opening (opening width) increases in the direction in which the toner 8 is to be transported (so that the opening width increases in the transport direction of the toner 8). 13 is arranged. In other words, the trapezoidal opening 17 replaces the triangular openings 17 of the two developer conveying means 15 and 16 so that the lower base of the trapezoid is located in the direction in which the toner 8 is to be conveyed. Even if it is provided, the same stirring effect of the toner 8 is obtained.

  FIGS. 5B to 5D are schematic diagrams for explaining a cut 18 that replaces the opening 17.

  The two developer conveying means 15, 16 have a notch portion in which an opening is formed by bending the conveyance unit 6 in the direction of rotation about the rotation shaft member 12 in the direction in which the toner 8 is to be conveyed. 18 may be formed.

  The notch 18 is bent by the conveying surface 13 of the two sheet members 141 and 142 as the conveyance unit 6 is rotated, and the bending of the notch 18 from the side where there is no notch due to the pressure from the received toner 8. The shape is such that the toner 8 moves to one end side. When the pressure from the toner 8 is applied to the conveying surface 13, the bending portion 19 is bent to move the toner 8 in the direction in which the opening of the cut portion 18 is formed, so that the toner 8 is moved in each predetermined direction. To be transported to.

  The shape of the opening formed by bending the bending portion 19 in the cut portion 18 may be a U shape or a triangular shape or a trapezoidal shape in which the opening width becomes narrower in the toner 8 conveyance direction. (FIGS. 5B, 5C, and 5D).

  In the case of a U-shaped notch, it bends with the pressure from the toner 8 from the non-notched side to the opposite notched side. In this way, the toner 8 can be transported by moving to the cut portion 18 where the toner 8 is bent.

  In the case of a triangular cut, a cut is formed from the bottom side of the triangle to the apex side so as to be easily bent by the pressure from the toner 8, and the toner 8 is conveyed in that direction.

  In the case of a trapezoidal cut, a cut is formed from the lower base side to the upper base side for the same reason, and the toner 8 is conveyed in that direction. Since the trapezoidal shape has more sides than the triangular shape, the size (opening width) of the opening in the direction perpendicular to the toner conveyance direction can be easily adjusted. It is possible to easily adjust the toner conveyance amount for conveying and moving the toner.

  In FIGS. 5A, 5B, 5C, and 5D, the transfer movement direction of the toner 8 with respect to the opening width is contradictory. This is because the transfer force of the toner 8 by the notch 18 is the opening width. This is because it exceeds the conveying force of the toner 8 due to the difference between the two.

  5 (e) and 5 (f), a tapered bending portion 19 is provided from the side of the opening 17 on the downstream side in the toner conveying direction toward the upstream side while leaving the opening of the opening 17. FIG. The opening 17 is formed by projecting a bending portion 19 having a shape smaller than the opening size of the opening 17 and tapering in the developer conveyance direction into the opening 17. FIG. 5E shows a triangular shape as the tapered bent portion 19, and FIG. 5F shows a trapezoidal shape.

  By adopting such a configuration in which the bent portion 19 and the opening portion are left on the downstream side in the toner conveyance direction, the toner 8 generated by the deflection of the deflection portion 19 is conveyed in a predetermined direction, and the rotating sheet member 14 is rotated. Therefore, the load from the toner 8 received by the toner can be moderately reduced so that the toner transportability to the developing roll 3 side is not hindered.

  Here, when the opening portion becomes large, the conveyance of the toner 8 in a predetermined direction is hindered. Therefore, the size of the opening portion includes the conditions such as the physical properties of the toner 8 and the rotation speed of the sheet member 14. An appropriate size is selected in relation to the size of the portion 19 and the rigidity of the material.

(Structure of reinforcement part)
FIG. 6 is a schematic view of the transport unit 6 according to the present invention.

  The transport unit 6 includes a rotation shaft member 12 extending along the same direction as the rotation axis direction of the developing roll 3, a side perpendicular to the rotation shaft member 12, and a side in the axial direction of the rotation shaft member 12. A sheet member 14 having a conveying surface 13 having The sheet member 14 is attached to the rotary shaft member 12 and is provided so as to be rotatable around the rotary shaft member 12 inside the developer container 2 which is a developer accommodating portion.

  The side in the axial direction of the rotation shaft member 12 of the sheet member 14 is the side of the rotation center side end 22 attached to the rotation shaft member 12 and the rotation tip side end facing the side of the rotation center side end 22. The side of the unit 23 is a developing unit in which the rotation tip side end 23 of the sheet member 14 is accommodated in the developer container 2 when the toner 8 is conveyed toward the developing roll 3 by the rotation of the conveyance unit 6. The toner 8 enters the portion where the toner 8 is stored, and the toner 8 is scooped and conveyed from the developer container 2 to the developing roll 3 side.

  Here, when the toner 8 is transported to the developing roll 3 side, if a load is applied to the toner transport surface 13 of the sheet member 14 and the sheet member 14 is excessively bent, the toner transportability to the developing roll 3 side is reduced. .

  As for the stirring of the toner 8 in the axial direction, if the sheet member 14 is bent too much, the projected area with respect to the toner 8 decreases due to the opening portion 17 being inclined with respect to the intrusion direction of the toner 8. Decreases and the stirrability decreases.

  The deflection of the sheet member 14 is adjusted by the length of the reinforcing portion that contacts the sheet member 14 based on the toner transportability to the developing roll 3 side. At this time, if all the reinforcing portions have the same length, the rigidity of the region of the first developer conveying means 15 far from the rotation center of the conveyance unit 6 of the sheet member 142 is the second development near the rotation center of the conveyance unit 6. It becomes lower than the rigidity of the region of the agent conveying means 16. For this reason, a difference in bending occurs between the first developer conveying means 15 and the second developer conveying means 16, and the first axial direction along the rotation axis of the conveying unit 6 and the opposite second axial direction. A difference also occurs in the conveying force of the toner 8, and the conveying property of the toner 8 becomes non-uniform.

  Therefore, the transport unit 6 transports the toner 8 in the first axial direction by the first developer transport means 15 and transports the toner 8 in the second axial direction by the second developer transport means 16. The first reinforcing portion 20 and the second reinforcing portion 21 are adjusted to have different degrees of reinforcement so that the non-uniformity is alleviated. At this time, adjustment is made so that the bent portion 19 of the sheet member 14 can also maintain the transportability of the toner 8 to the developing roll 3 side. As a result, the transport unit 6 can sufficiently stir the toner 8 in the developer container 2 in the direction of the rotation axis of the transport unit 6 and also adjust the transportability of the toner 8 toward the developing roller 3 in the radial direction of the transport unit 6. It becomes the structure which can be done.

  Further, details of the configuration will be described with reference to FIG.

  The sheet members 141 and 142 in FIG. 6 are provided with the opening 17 in FIG. 5E and a sheet-like bending portion 19 that bends within the opening of the opening 17.

  On the respective conveying surfaces 13 of the first sheet member 141 and the second sheet member 142, an opening 17 and a bending portion 19 are provided along the rotation axis direction of the rotation shaft member 12, and toner is supplied in a desired direction. The first developer conveying means 15 arranged in a row so as to convey, and the opening 17 and the bending portion 19 so as to convey the toner in the direction opposite to the toner conveying direction by the first developer conveying means 15 And a second developer conveying means 16 in which are arranged.

  The first developer conveying means 15 is disposed adjacent to the rotating tip end side in the rotational radius direction of the rotating shaft member 12 relative to the second developer conveying means 16. For example, the toner 8 is transported toward the end of the rotational shaft member 12 in the rotational axis direction by the first developer transport means 15 of the sheet member 141, and is further rotated by the second developer transport means 16. The member 12 is conveyed toward the center side in the rotation axis direction.

  The sheet members 141 and 142 extend 2 from the rotation center side end portion 22 with respect to the rotation shaft member 12 in the direction of the rotation front end side end portion 23 of the sheet members 141 and 142 (the rotation radius direction of the sheet members 141 and 142). Types of reinforcements 20, 21 are provided.

  The sheet members 141 and 142 are made of a flexible material, and are greatly bent backward in the rotation direction due to a load received from the toner 8 during rotation. In this case, the conveying force of the toner 8 toward the developing roll 3 due to the rotation of the sheet members 141 and 142 and the conveying force in the axial direction by the first developer conveying unit 15 are reduced. The first reinforcing portion 20 is for adjusting the bending, and is made of a material having a rigidity equal to or higher than the rigidity of the sheet members 141 and 142.

  The first reinforcing portion 20 is arranged from the rotation center side end portion 22 to a region where the first developer conveying means 15 is provided in a portion that is not the opening portion 17 of the sheet members 141 and 142.

  The second reinforcing portion 21 adjusts the amount of bending of the sheet members 141 and 142 together with the first reinforcing portion 20 and is opposite to the first developer conveying means 15 by the second developer conveying means 16. This is for adjusting the toner conveying force in the direction.

  The second reinforcing portion 21 is arranged from the rotation center side end portion 22 to a region where the second developer conveying means 16 is provided in a portion that is not the opening portion 17 of the sheet members 141 and 142. The second reinforcing portion 21 is shorter than the first reinforcing portion 20.

  The second reinforcement portion 21 can adjust the amount of bending as described above by selecting a material having a rigidity equal to or greater than the length from the rotation center side end portion 22 and the rigidity of the sheet members 141 and 142. That is, by increasing the length of the second reinforcing portion 21 or increasing the rigidity, the bending of the sheet members 141 and 142 during rotation can be reduced.

  The first reinforcing portion 20 and the second reinforcing portion 21 are obtained by forming at the same time when the rotary shaft member 12 is formed. Alternatively, the first reinforcing portion 20 and the second reinforcing portion 21 may be formed by attaching an elongated member formed of a material having a predetermined rigidity to the position of the rotary shaft member 12 or the sheet members 141 and 142 described above. Further, when the sheet members 141 and 142 are formed, the first reinforcing portion 20 and the second reinforcing portion 21 may be formed by increasing the sheet thickness at the position of the above-described sheet members 141 and 142.

[Second Embodiment]
The transport unit 6 having the first reinforcing portion 20 and the second reinforcing portion 21 described in the first embodiment is a toner bottle (toner cart) as a developer supply container that is replaceably attached to the developer container 2. It can also be used as an agitating member 10 that is rotatably provided inside the jig) 7.

  The agitating member 10 conveys the toner 8 to the toner replenishing port for supplying the toner to the developer container 2 without agitating the toner 8 in the toner bottle 7, but has the configuration described in the first embodiment. By using it, the toner 8 in the toner bottle 7 can be efficiently supplied to the developer container 2.

DESCRIPTION OF SYMBOLS 1 ... Developing device 2 ... Developer container 3 ... Developing roll 4 ... Developing blade 5 ... Toner conveying member 6 ... Conveying unit 7 ... Toner bottle 8 ... Toner 9 ... Toner supply port 10 ... Stirring member 11 ... Supply port communication area 12 ... Rotating shaft member 13 ... Conveying surface 14 ... Sheet member 15 ... First developer conveying means 16 ... second developer conveying means 17 ... opening 18 ... cutting portion 19 ... flexing portion 20 ... first reinforcing portion 21 ... second reinforcing portion 22 ...・ Rotation center side end 23 ・ ・ ・ Rotation tip side end 141 ・ ・ ・ Sheet member

Claims (9)

A rotating shaft member including a rotating shaft portion;
A sheet member held by the rotating shaft member,
The first opening is a first opening that conveys the developer in a first direction along the rotation axis of the rotation shaft member, and widens the opening width in the rotation radius direction of the rotation shaft member in the first direction . One developer transport section, and a position closer to the rotation shaft than the first developer transport section in the rotational radius direction and at least a part of the first developer in the axial direction of the rotation shaft A second opening that is disposed to overlap with the conveyance unit and conveys the developer in a second direction opposite to the first direction, and the opening width in the rotational radius direction increases toward the second direction. a sheet member having a second developer conveying portion, the is,
A first reinforcing portion that is arranged to extend in the rotational radius direction from the rotating shaft portion, and whose tip is disposed in a region where the first developer conveying portion is provided;
A reinforcing unit including: a second reinforcing portion disposed extending from the rotating shaft portion in the rotational radius direction and having a tip disposed in a region where the second developer conveying portion is provided;
A developing device comprising:   The developer carrying member is transported toward the developer carrying member by the rotation of the sheet member held by the rotating shaft member, and the first reinforcing portion and the second reinforcing portion are The developing device according to claim 1, wherein a length from the rotating shaft portion is set based on a transport amount of the developer toward the developer carrying member. The said 1st reinforcement part and the said 2nd reinforcement part are provided in the area | region where the said 1st opening part and the said 2nd opening part are not distribute | arranged in the said axial direction. The developing device according to claim 1 or 2 . The developing device according to any one of claims 1 to 3 is provided as the developing device, and the electrostatic latent image formed on the image carrier is developed by the developing device to form an image. Image forming apparatus. A rotating shaft member including a rotating shaft portion;
The rotating shaft member is held by the rotating shaft member and conveys the developer in a first direction along the rotating shaft of the rotating shaft member, and the opening width in the rotational radius direction of the rotating shaft member widens in the first direction. conveying a first developer conveying portion is a first opening, said first developer developer in a second direction opposite the first direction at a position closer to the rotation axis than the conveying unit A second developer transporting portion that is a second opening that widens the opening width in the radial direction of rotation toward the second direction , and a sheet member comprising:
A reinforcing unit having a plurality of reinforcing portions extending in the radial direction of rotation from the rotating shaft portion and reinforcing the sheet member, wherein each end of the sheet member reinforces both ends in the direction along the rotating shaft. A reinforcing unit including a part reinforcing part and an inner reinforcing part provided between the end reinforcing part and shorter in length than the end reinforcing part;
A developing device comprising: The first developer transporting section and the second developer transporting section have openings, and the openings are formed with respect to the projecting section projecting in the axial direction of the rotation shaft provided in the sheet member. 6. The developing device according to claim 5, wherein an opening adjacent to the inside and the outside in the rotational radius direction is connected to an opening adjacent to the tip of the projecting portion in the axial direction. A rotating shaft member including a rotating shaft portion;
A sheet member held by the rotating shaft member,
A first developer conveying section that conveys the developer in a first direction along the rotation axis of the rotating shaft member; and the rotating shaft from the first developer conveying section in the rotation radius direction of the rotating shaft member. And at least a part of the rotating shaft in the axial direction of the rotating shaft is overlapped with the first developer transport section, and the developer is placed in a second direction opposite to the first direction. A second developer conveying section that conveys the sheet in a sheet, and the first developer conveying section and the second developer conveying section have a triangular shape whose opening width increases in the developer conveying direction. Or a sheet member including a trapezoidal opening;
A first reinforcing portion that is arranged to extend in the rotational radius direction from the rotating shaft portion, and whose tip is disposed in a region where the first developer conveying portion is provided;
A second reinforcing portion disposed extending from the rotating shaft portion in the rotational radius direction and having a tip disposed in a region where the second developer conveying portion is provided;
A reinforcing unit including:
A developing device comprising: A rotating shaft member including a rotating shaft portion;
A sheet member held by the rotating shaft member,
A first developer conveying section that conveys the developer in a first direction along the rotation axis of the rotating shaft member; and the rotating shaft from the first developer conveying section in the rotation radius direction of the rotating shaft member. And at least a part of the rotating shaft in the axial direction of the rotating shaft is overlapped with the first developer transport section, and the developer is placed in a second direction opposite to the first direction. A triangular developer whose opening width becomes narrower in the developer conveyance direction as the first developer conveyance unit and the second developer conveyance unit. A sheet member including a shape or trapezoidal cut;
A first reinforcing portion that is arranged to extend in the rotational radius direction from the rotating shaft portion, and whose tip is disposed in a region where the first developer conveying portion is provided;
A second reinforcing portion disposed extending from the rotating shaft portion in the rotational radius direction and having a tip disposed in a region where the second developer conveying portion is provided;
A reinforcing unit including:
A developing device comprising: A rotating shaft member including a rotating shaft portion;
A sheet member held by the rotating shaft member,
A first developer conveying section that conveys the developer in a first direction along the rotation axis of the rotating shaft member; and the rotating shaft from the first developer conveying section in the rotation radius direction of the rotating shaft member. And at least a part of the rotating shaft in the axial direction of the rotating shaft is overlapped with the first developer transport section, and the developer is placed in a second direction opposite to the first direction. A second developer conveying section for conveying the sheet in the sheet, and the first developer conveying section and the second developer conveying section as the first developer conveying section and the second developer conveying section in the rotational radial direction with respect to the protruding section protruding in the axial direction. A sheet member including an opening connected to an inner side and an outer side and an opening adjacent to an opening adjacent to a tip of the protruding portion in the axial direction;
A first reinforcing portion that is arranged to extend in the rotational radius direction from the rotating shaft portion, and whose tip is disposed in a region where the first developer conveying portion is provided;
A second reinforcing portion disposed extending from the rotating shaft portion in the rotational radius direction and having a tip disposed in a region where the second developer conveying portion is provided;
A reinforcing unit including:
A developing device comprising:

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