JP4766015B2 - Developer transport device - Google Patents

Description

  The present invention relates to a developer transport device that transports a developer using a traveling wave electric field.

  In general, a developer transport device that transports a developer using a traveling wave electric field has a transport body in which a large number of linear transport electrodes are arranged in a line, and each transport electrode of the transport body is provided with each transport electrode. On the other hand, a traveling wave electric field is formed by sequentially applying a multiphase AC voltage, and the charged developer is conveyed. In such a developer transport device, when the developer and the transport body rub against each other during transport of the developer and the surface of the transport body is overcharged, the developer adheres to the transport body and a transport failure may occur. is there.

  In order to solve such a problem, a developer conveying device is conventionally known that includes a covering member that moves along the surface of the conveying member and a charge eliminating member that neutralizes the covering member (see Patent Document 1). . In this developer transport device, the surface of the transport body is covered with the covering member to prevent the developer from adhering to the surface of the transport body, and the covering member is discharged by the charge eliminating member so The charging is suppressed, and the fixing of the developer to the covering member is suppressed.

JP 2002-91160 A

  However, in the above-described prior art, only the charge of the covering member is removed, and therefore, when the developer is overcharged due to friction between the developer and the covering member during transportation or between the developers, development is performed. The excess charge of the agent could not be removed. When the developer is overcharged in this way, the developers adhere to each other to form a lump, and the lump adheres to the covering member (conveyance body), which may cause a conveyance failure. .

  In view of the above, an object of the present invention is to provide a developer transport device that can satisfactorily transport a developer by suppressing overcharging of the developer.

In order to solve the above problems, a developer transport device according to the present invention includes a plurality of transport electrodes, and includes a transport surface that transports a granular developer charged by forming a traveling wave electric field with these transport electrodes. A first transport body and a second transport body; and an ion irradiation member that neutralizes excess charges of the developer by irradiating ions, and from the transport surface of the first transport body, The first transport body and the second transport body are arranged with the transport surfaces spaced apart from each other so that the developer jumps to the transport surface, and the ion irradiation member includes the developer and the jump just before the jump. It is characterized in that ions are irradiated toward the developer immediately after the transfer or the developer in the middle of the jump.

According to the present invention, the ion irradiation member irradiates ions toward the developer immediately before jumping and the developer immediately after jumping, or the developer in the middle of jumping. be able to.

  According to the present invention, since the developer is neutralized by irradiating ions with the ion irradiation member, overcharging of the developer is suppressed, and the developer can be transported satisfactorily.

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In the drawings to be referred to, FIG. 1 is a side view showing a schematic configuration of a laser printer according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a structure of a toner supply device. FIG. 3 is a plan view (a) and a cross-sectional view (b) showing the toner carrier, and FIG. 4 is a diagram showing a waveform of a voltage output from each power feeding unit. 5 is a front view showing the ion irradiation member, and FIG. 6 is a cross-sectional view showing a toner conveyance state, a cross-sectional view (a) showing a state at time t1, and a state at time t2. FIG. 6B is a cross-sectional view showing the state at time t3. FIG.

<Laser printer>
As shown in FIG. 1, a laser printer 1 includes a paper transport mechanism 2, a photosensitive drum 3 as an example of an image carrier, a charger 4, a scanner unit 5, and a toner as an example of a developer transport device. A supply device 7 and a control device 8 are provided. Although not shown, the laser printer 1 is appropriately provided with known configurations such as a paper feed tray and a fixing device.

  The paper transport mechanism 2 is a known mechanism that transports the paper P from the paper feed tray, and transports the paper P to the transfer position of the photosensitive drum 3 via a plurality of rollers (for example, registration rollers 21).

  The photosensitive drum 3, the charger 4 and the scanner unit 5 have a known configuration. In brief, the surface of the photosensitive drum 3 is uniformly negatively charged by the charger 4 and then exposed by high-speed scanning of the laser beam LB from the scanner unit 5. As a result, the potential of the exposed portion changes and an electrostatic latent image based on the image data is formed. Next, toner T (see FIG. 2) as an example of a developer is supplied from the toner supply device 7 to the electrostatic latent image on the photosensitive drum 3, and this toner T is selected on the surface of the photosensitive drum 3. The toner image is formed by reversal development. Thereafter, the photosensitive drum 3 and the transfer roller 22 are rotationally driven so as to sandwich and convey the paper P between them, and the toner image carried on the surface of the photosensitive drum 3 at this time is transferred to the transfer roller 22. Is transferred onto the paper P.

<Toner supply device>
As shown in FIG. 2, the toner supply device 7 includes a cartridge case 71, an agitator 72, a toner transport body 73, and an ion irradiation member 74.

  The cartridge case 71 includes a single upper wall 71A, four side walls 71B, and a single bottom wall 71C. The cartridge case 71 has a negatively chargeable, non-chargeable material mainly composed of polyester. A black toner T having a single magnetic component is accommodated. The upper wall 71A is a rectangular plate-like member in plan view, and is disposed horizontally. A supply port 71 </ b> D disposed at a position facing the photosensitive drum 3 is formed at a proper position on the upper wall 71 </ b> A. The bottom wall 71 </ b> C is formed so as to incline upward toward the downstream side in the transport direction of the toner T by the toner transport body 73, whereby the toner T that has dropped from the downstream end of the toner transport body 73 is formed. The toner is returned to the upstream end of the toner transport body 73.

  The agitator 72 is rotatably provided at the deepest part in the cartridge case 71 and agitates the toner T accumulated in the cartridge case 71. The agitated toner T is negatively charged due to friction between the toners T and friction between the toner T and the toner transport body 73.

  The toner transport body 73 is disposed in the cartridge case 71, and is disposed on the support plate 731 which is a plate member made of synthetic resin and the support plate 731 as shown in FIG. A plurality of transport electrodes 732 and a coating film 733 covering the side of the support plate 731 on which the transport electrodes 732 are disposed are provided. Here, as the coating film 733, for example, a nylon coating film which is a synthetic resin can be employed. The surface of the coating film 733 serves as a transport surface TS for transporting the toner T.

  As shown in FIG. 3A, the transport electrodes 732 are linear wiring patterns made of a metal thin film, and are arranged at equal intervals in the toner T transport direction and orthogonal to the toner T transport direction. They extend along the direction (the axial direction of the photosensitive drum 3) and are arranged in parallel to each other. As shown in FIG. 3B, the first feeding unit VA, the second feeding unit VB, the third feeding unit VC, and the fourth feeding unit VD that output voltages having different phases to the transport electrodes 732, respectively. Are appropriately connected. Specifically, the first power feeding unit VA, the second power feeding unit VB, the third power feeding unit VC, and the fourth power feeding unit VD are repeatedly connected to the respective transport electrodes 732 in this order from the upstream side in the transport direction. . In other words, every three transport electrodes 732 are connected to the same power supply unit (for example, the first power supply unit VA) every third. In the following description, for the sake of convenience, the transport electrode 732 connected to the first power supply unit VA is referred to as “transport electrode EA”, the transport electrode 732 connected to the second power supply unit VB is referred to as “transport electrode EB”, and third. The transport electrode 732 connected to the power supply unit VC is also referred to as “transport electrode EC”, and the transport electrode 732 connected to the fourth power supply unit VD is also referred to as “transport electrode ED”.

  Each of the power supply units VA to VD outputs a voltage having a waveform as shown in FIG. 4 by being appropriately controlled by the control device 8 disposed in the laser printer 1. In other words, the voltages output from the power supply units VA to VD have the same waveform, but are out of phase by 90 °. Specifically, the phase of the voltage waveform is delayed by 90 ° in the order of the first power supply unit VA, the second power supply unit VB, the third power supply unit VC, and the fourth power supply unit VD. Then, a traveling-wave voltage is applied to each transport electrode 732 by each of the power supply units VA to VD controlled by the control device 8 in this manner, thereby forming a traveling-wave electric field on the transport surface TS. .

  Specifically, at time t1 in FIG. 4, a negative voltage is output from the first power supply unit VA and the fourth power supply unit VD, and a positive voltage is output from the second power supply unit VB and the third power supply unit VC. The As a result, as shown in FIG. 6A, an electric field EF1 opposite to the transport direction is formed between the negative transport electrode EA and the positive transport electrode EB, and the positive transport electrode EC and the negative transport electrode EC are negative. An electric field EF2 is formed in the transport direction between the transport electrode ED. Therefore, a large amount of negative toner T is collected around the positive transport electrodes EB and EC. A small amount of toner T that could not move to the positive transport electrodes EB and EC remains between the negative transport electrodes ED and EA.

  As shown in FIG. 4, at time t2, a negative voltage is output from the first power supply unit VA and the second power supply unit VB, and a positive voltage is output from the third power supply unit VC and the fourth power supply unit VD. . As a result, as shown in FIG. 6B, an electric field EF1 is formed between the negative transport electrode EB and the positive transport electrode EC, so that the toner around the transport electrodes EB and EC at time t1. T moves around the transport electrodes EC and ED that have become positive this time. Similarly, at time t3 (see FIG. 4), as shown in FIG. 6C, an electric field EF1 is formed between the negative transport electrode EC and the positive transport electrode ED, so that time t2 The toner T around the transport electrodes EC and ED moves around the transport electrodes ED and EA that have become positive this time. By repeating the above operation, the toner T is transported on the transport surface TS.

  As shown in FIG. 2, the toner transport body 73 configured as described above includes an upstream transport body 73A as an example of a first transport body, an intermediate transport body 73B as an example of a second transport body, and a downstream transport body. The body 73C is divided into three.

  The upstream side conveyance body 73A is bent in a substantially L shape, and an inclined portion A1 slightly inclined toward the supply port 71D as it goes upward from the deepest portion side of the cartridge case 71, and the conveying direction of the inclined portion A1 And a horizontal portion A2 extending horizontally from the downstream end.

  The intermediate conveyance body 73B is formed in a plate shape, and the horizontal portion A2 of the upstream conveyance body 73A is a distance that allows the toner T to jump from the conveyance surface TS of the horizontal portion A2 of the upstream conveyance body 73A. The cartridge case 71 is disposed on the upper wall 71A so as to be separated from the cartridge case 71. Specifically, the horizontal portion A2 and the intermediate transport body 73B of the upstream transport body 73A are disposed with their transport surfaces TS facing each other, and are shifted in the transport direction of the toner T. .

  The downstream side conveyance body 73C is bent and formed in a substantially L shape, and extends toward the downstream side in the conveyance direction as it goes downward from the horizontal portion C1 extending in the horizontal direction and the end portion of the horizontal portion C1 on the downstream side in the conveyance direction. And an inclined portion C2 that is slightly inclined. The horizontal portion C1 and the intermediate transport body 73B of the downstream transport body 73C are disposed with their transport surfaces TS facing each other, and are shifted in the transport direction of the toner T. . Note that the upstream portion of the horizontal portion C1 of the downstream side conveyance body 73C faces the photosensitive drum 3 through the supply port 71D, whereby the toner T on the upstream portion of the horizontal portion C1 is transferred to the photosensitive drum. 3 is attracted to the electrostatic latent image 3.

  Two ion irradiation members 74 are arranged on the upstream side in the transport direction from the supply port 71D of the cartridge case 71, and the first neutralization power supply unit 91 and the second neutralization power supply disposed outside the cartridge case 71. The ion irradiation device 9 is configured together with the unit 92 and the control device 8. Specifically, one of the two ion irradiation members 74 (hereinafter also referred to as “first ion irradiation member 741”) is disposed above the downstream end of the upstream transport body 73A in the transport direction, The other (hereinafter also referred to as “second ion irradiation member 742”) is disposed below the end of the intermediate transport body 73B on the upstream side in the transport direction. That is, the first ion irradiation member 741 is disposed at a position where ions can be irradiated toward the toner T located on the intermediate conveyance body 73B side of the conveyance surface TS of the upstream conveyance body 73A, and the second ion irradiation member. 742 is arranged at a position where ions can be irradiated toward the toner T located on the upstream side conveyance body 73A side of the conveyance surface TS of the intermediate conveyance body 73B.

  Here, as shown in FIG. 5, the ion irradiation member 74 is a long metal member formed with the same width as the width in the longitudinal direction of the transport electrode 732 (width orthogonal to the transport direction). 732. The ion irradiation member 74 has a plurality of sharp protrusions 74A formed at the lower end thereof, and ions are generated from the comb-like portion.

  The first neutralization power supply unit 91 is appropriately controlled by the control device 8 to output an AC voltage having 0 V as a reference voltage to the first ion irradiation member 741 at a predetermined timing. In addition, the second static elimination power supply unit 92 is appropriately controlled by the control device 8 to output an AC voltage having 0 V as a reference voltage to the second ion irradiation member 742 at a predetermined timing.

  The control device 8 includes a CPU, a RAM, a ROM, and the like, and appropriately controls driving of each unit of the laser printer 1 and voltage output. Specifically, the control device 8 outputs an activation signal to the first static elimination power supply unit 91 when the toner T is conveyed to the end on the downstream side in the conveyance direction on the upstream conveyance body 73A, and the first static elimination charge is output. An AC voltage is output from the power supply unit 91. In addition, when the toner T jumps from the upstream side conveyance body 73A to the upstream side in the conveyance direction of the intermediate conveyance body 73B, the control device 8 outputs an activation signal to the second static elimination power supply unit 92, and the second static elimination An AC voltage is output from the power supply unit 92. Note that the timing at which the toner T reaches the downstream end in the transport direction of the upstream transport body 73A and the timing at which the toner T jumps from the upstream transport body 73A to the upstream in the transport direction of the intermediate transport body 73B What is necessary is just to determine suitably by simulation etc.

  Next, the effect | action of static elimination by the above-mentioned ion irradiation member 74 is demonstrated. In the drawings to be referred to, FIG. 7 is a cross-sectional view showing the effect of charge removal by the ion irradiation member, and a cross-sectional view (a) showing a state where the toner is positioned on the upstream side in the transport direction from the first ion irradiation member; A cross-sectional view (b) showing a state in which the front side of the toner has been neutralized by the ion irradiation member, a cross-sectional view (c) showing a state in which the toner has jumped to the intermediate conveyance body, and a back side of the toner by the second ion irradiation member It is sectional drawing (d) which shows the state from which static elimination was carried out. In FIG. 7, the toner T that is in an excessively charged state is shown in black.

  As shown in FIG. 7A, the toner T conveyed from the upstream side of the upstream conveyance body 73A is overcharged due to friction with the conveyance surface TS of the upstream conveyance body 73A or friction between the toners T. Become. Then, as shown in FIG. 7B, when the toner T in an overcharged state is conveyed to the lower side of the first ion irradiation member 741, ions are irradiated from the first ion irradiation member 741 into the air, The ions are attracted toward the overcharged toner T. As a result, the toner T on the front side (upper side) of the stacked toners T is discharged.

  Thereafter, as shown in FIG. 7C, the toner T jumps from the upstream transport body 73A to the intermediate transport body 73B. At this time, among the stacked toners T, the toner T that has been positioned on the back side on the upstream side conveyance body 73A is positioned on the front side on the intermediate conveyance body 73B because the toner T is attracted to the intermediate conveyance body 73B sequentially. Will be. Therefore, as shown in FIG. 7D, the first ion irradiation member 741 is irradiated with ions from the second ion irradiation member 742 toward the toner T immediately after the toner T moves to the intermediate conveyance body 73B. The toner T that has not been neutralized in this step is neutralized, and the entire toner T is neutralized.

According to the above, the following effects can be obtained in the present embodiment.
Since the ion irradiation members 741 and 742 irradiate the air with ions, the toner T is neutralized, so that overcharging of the toner T is suppressed and the toner T can be transported satisfactorily.

Since the first ion irradiation member 741 is provided at the end of the upstream transport body 73A on the intermediate transport body 73B side, it is transported for a long distance from the upstream end to the downstream end of the upstream transport 73A. Accordingly, the toner T that is overcharged to the maximum can be efficiently discharged.
Since the second ion irradiation member 742 is provided at the end of the intermediate conveyance body 73B on the upstream conveyance body 73A side, the backside toner T that has not been neutralized by the first ion irradiation member 741 can be neutralized.

Since the ion irradiation member 74 is formed with the same width as the width of the transport electrode 732, the toner T held on the transport electrode 732 can be neutralized efficiently as a whole (see FIG. 5).
Since the ion irradiation member 74 is provided on the upstream side in the transport direction from the supply port 71D of the cartridge case 71, the toner T can be discharged in a good state before being supplied to the photosensitive drum 3.

In addition, this invention is not limited to the said embodiment, It can utilize with various forms so that it may illustrate below.
The arrangement position of the ion irradiation member 74 is not limited to the above embodiment, and can be appropriately arranged at an arbitrary position in the vicinity of the toner conveyance body 73. For example, as shown in FIG. 8, the ion irradiation member 74 can be irradiated with ions toward the moving path of the toner T when jumping from the transport surface TS of the upstream transport body 73A to the transport surface TS of the intermediate transport body 73B. You may arrange | position in various positions. In this case, it is desirable to provide a ground member 75 for collecting ions on the opposite side of the ion irradiation member 74 across the moving path of the toner T.

  Note that, similarly to the above-described embodiment, the power supply unit 93 is appropriately controlled by the control device 8 so that the toner T starts to jump from the upstream side conveyance body 73A to the intermediate conveyance body 73B until it finishes jumping. The AC voltage is output to the ion irradiation member 74. Here, the timing and time for outputting the AC voltage may be appropriately determined by experiments, simulations, and the like, as in the above embodiment.

  The operation of the ion irradiation member 74 arranged in this way will be described. As shown in FIG. 9A, when the toner T is transported to the downstream end of the upstream transport body 73A, the ion irradiation member 74 irradiates ions as shown in FIG. 9B. Be started. The toner T stacked at the downstream end of the upstream conveyance body 73A moves in order from the toner T on the upper side toward the intermediate conveyance body 73B. During this movement, the toner T sequentially receives ions from the ion irradiation member 74, so that the toner T can be uniformly discharged as shown in FIGS. 9B to 9D. Since ions that have not contributed to the charge removal of the toner T are collected by the ground member 75, the influence of the ions on other members can be suppressed.

  In the embodiment, the upstream transport body 73A is used as the first transport body and the intermediate transport body 73B is used as the second transport body, but the present invention is not limited to this. For example, as shown in FIG. 10, an intermediate transport body 73B is employed as the first transport body, and a downstream transport body 73C is employed as the second transport body, and the intermediate transport body 73B as the first transport body is disposed downstream in the transport direction. The ion irradiation member 74 may be disposed so as to face the end. Even in this case, the toner T that is overcharged by the conveyance from the upstream side to the downstream side of the intermediate conveyance body 73B can be satisfactorily discharged.

  In the above-described embodiment, the upstream transport body 73A and the intermediate transport body 73B are disposed in a state where the transport surfaces TS face each other, and are disposed so as to be displaced in the transport direction of the toner T. The present invention is not limited, and any arrangement may be used as long as the transport surfaces TS are arranged apart from each other. That is, for example, as shown in FIG. 11A, the transport surface TS of the first transport body 100 and the transport surface TS of the second transport body 110 may be separated on the same plane, or FIG. ), The transport surfaces TS may be separated such that the angle formed by the first transport body 100 and the second transport body 110 is a right angle. However, compared to the structure in which the transport surfaces TS are arranged on the same plane as shown in FIG. 11A, the toner T jumps in the structure in which the transport surfaces TS are arranged in the opposite direction as in the embodiment. Since it moves easily, it is preferable to arrange as in the above embodiment.

In the above-described embodiment, the toner T that is negatively charged is used. However, the present invention is not limited to this, and a toner that is charged positively may be used. In this case, the charged state of the photosensitive drum or the like may be reversed from that in the above embodiment.
In the above-described embodiment, ions are generated by applying a voltage to the ion irradiation member 74. However, the present invention is not limited to this, and a grounded needle-like conductor is arranged as an ion irradiation member in the vicinity of the charged toner. By providing it, you may make it generate | occur | produce ion by the self-discharge from this acicular conductor. As the needle-like conductor that self-discharges in this way, for example, a stainless fiber type, a sanderlon fiber type, a carbon fiber type, an amorphous fiber type, or the like can be adopted.

  In the above-described embodiment, the toner conveyance bodies that are divided into three in the toner conveyance direction are alternately arranged up and down. However, the present invention is not limited to this, and the conveyance surface of the first conveyance body is at least during the charge removal of the toner. The first transport body and the second transport body may be disposed with the transport surfaces separated from each other so that the toner jumps from the transport surface to the transport surface of the second transport body. For example, as shown in FIG. 12, the first transport body 120 and the second transport body 130 may be arranged in parallel so that the transport surfaces TS face and separate from each other. In this case, when the normal toner T is transported, the voltages as in the above-described embodiment are applied to all the transport electrodes 121 and 131 of the transport bodies 120 and 130 to transport the transport bodies 120 and 130. A traveling wave electric field is formed on the surface TS, and the toner T is transported between the transport bodies 120 and 130. When the toner T is neutralized, the controller 140 applies a voltage only to the group of transport electrode groups 121A, 121B, 131A,... Arranged at positions that are staggered vertically in the toner T transport direction. Thus, a traveling wave electric field is formed only in each of the transport electrode groups 121A, 121B, 131A,. As a result, the toner T jumps from the first transport body 120 to the second transport body 130 as in the above embodiment. Therefore, by arranging the ion irradiation member 74 similar to that in the above embodiment in the vicinity between the transport electrode group 121A on the first transport body 120 side and the transport electrode group 131A on the second transport body 130 side, the toner T Can be satisfactorily eliminated.

1 is a side view showing a schematic configuration of a laser printer according to an embodiment of the present invention. FIG. 3 is a cross-sectional view illustrating a structure of a toner supply device. FIG. 4 is a plan view (a) and a cross-sectional view (b) showing a toner transport body. It is a figure which shows the waveform of the voltage output from each electric power feeding part. It is a front view which shows an ion irradiation member. FIG. 4 is a cross-sectional view showing a toner conveyance state, a cross-sectional view (a) showing a state at time t1, a cross-sectional view (b) showing a state at time t2, and a cross-section showing a state at time t3. It is a figure (c). FIG. 4 is a cross-sectional view showing the effect of charge removal by the ion irradiation member, a cross-sectional view (a) showing a state where the toner is located upstream in the transport direction from the first ion irradiation member, Cross-sectional view (b) showing the state of charge removal, cross-sectional view (c) showing the state where the toner has jumped to the intermediate transport body, and cross-sectional view showing the state where the back side of the toner is discharged by the second ion irradiation member (D). It is sectional drawing which shows the form which changed the arrangement position of an ion irradiation member. FIGS. 9A and 9B are cross-sectional views showing the effect of charge removal by the ion irradiation member shown in FIGS. 8A and 8B, a cross-sectional view showing a state where toner is located at an end on the downstream side of the upstream conveyance body, A cross-sectional view (b) showing a state in which the toner starts to move toward the center, a cross-sectional view (c) showing a state in which the toner on the back side starts to move toward the intermediate transport member, and all of the toner jumping to the intermediate transport member. It is sectional drawing (d) which shows the state. It is sectional drawing which shows the form which changed the arrangement position of an ion irradiation member. FIG. 4 is a cross-sectional view showing a configuration in which the arrangement position of the toner transport body is changed, and is a cross-sectional view (a) showing a configuration in which the transport surfaces are separated from each other on the same plane, and the transport surfaces are arranged at right angles and separated. It is sectional drawing (b) which shows a form. FIG. 4 is a cross-sectional view showing a configuration in which a first transport body and a second transport body are arranged to face each other, and toner can be jumped to each transport surface by control.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Laser printer 7 Toner supply apparatus 8 Control apparatus 9 Ion irradiation apparatus 71 Cartridge case 71D Supply port 73 Toner conveyance body 73A Upstream conveyance body 73B Intermediate conveyance body 73C Downstream conveyance body 74 Ion irradiation member 93 Power supply part 731 Support plate 732 Conveyance Electrode 733 Coating film T Toner TS Transport surface

Claims (7)

A plurality of transport electrodes, a first transport body and a second transport body having a transport surface for transporting a granular developer charged by forming a traveling wave electric field with these transport electrodes;
An ion irradiation member that neutralizes the excess charge of the developer by irradiating with ions, and
The first transport body and the second transport body are arranged with the transport surfaces separated from each other so that the developer jumps from the transport surface of the first transport body to the transport surface of the second transport body. ,
The developer conveying device, wherein the ion irradiation member irradiates ions toward a developer immediately before jumping and a developer immediately after jumping or a developer in the middle of jumping. The first transport body and the second transport body are disposed with their transport surfaces facing each other, and are shifted in the transport direction of the developer. Item 2. The developer conveying device according to Item 1. The ion irradiating member includes a position where ions can be irradiated toward a developer located on the first conveying body side of the conveying surface of the second conveying body, and the second of the conveying surfaces of the first conveying body . The developer conveying device according to claim 2, wherein the developer conveying device is disposed at a position where ions can be irradiated toward the developer positioned on the conveying body side .   The ion irradiation member is disposed at a position where ions can be irradiated toward a developer movement path when jumping from the conveyance surface of the first conveyance body to the conveyance surface of the second conveyance body. The developer conveying device according to claim 2, wherein 5. The developer transport device according to claim 1 , wherein the ion irradiation member is formed to have the same width as a width orthogonal to a transport direction of the transport electrode. The developer conveying device according to claim 4 , wherein a grounding member that collects ions is provided on a side opposite to the ion irradiation member across the movement path of the developer. A supply port configured to supply a developer conveyed by the first conveyance body or the second conveyance body to an image carrier on which an electrostatic latent image is formed and disposed outside the developer conveyance device; ,
The developer conveying apparatus according to claim 1 , wherein the ion irradiation member is disposed upstream of the supply port in the conveying direction.

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