JP6786650B2 - Static elimination brush and image forming device - Google Patents

Description

The present invention relates to a static elimination brush and an image forming apparatus having the same.

In image forming devices such as copiers, printers, and facsimile machines, static electricity eliminating brushes are used to reduce and remove static electricity charged on sheets.

Some static elimination brushes are integrally unitized by sandwiching a brush material made of a large number of conductive fibers arranged between an aluminum tape and one adhesive surface of a conductive double-sided tape. The static elimination brush unit is held by adhering the other adhesive surface of the conductive double-sided tape to a conductive holding member such as a metal plate, and is electrically contacted with a ground portion such as a side plate via a ground member. Ground.

Conductive double-sided tape generally has weak adhesiveness. Therefore, the double-sided tape may be peeled off due to the contact sliding between the conveyed sheet and the static elimination brush. As a countermeasure, the static elimination brush unit and the holding member can be sandwiched by the sandwiching member so as not to be peeled off. However, the structure is complicated and many parts are used, which is costly. Further, the conductive double-sided tape is expensive, and in an image forming apparatus such as a copying machine, a printer, and a facsimile apparatus, for which a low price is desired, a static elimination brush having a simple and inexpensive configuration is required.

For example, in Patent Document 1, a static elimination brush main body is attached to a ground plate by a non-conductive adhesive tape, and a static elimination brush inserted into an opening provided in the ground plate is applied to the wall surface of the opening at a constant pressure. A static elimination unit that makes electrical contact has been proposed.

Japanese Unexamined Patent Publication No. 2002-8890

However, in the static elimination unit of Patent Document 1, the pressure for pressing the wall surface of the opening of the ground plate is weakened due to the aging of the static elimination brush, and there is a possibility that poor contact may occur.

The present invention solves the above problems, and an object of the present invention is to provide a static elimination brush having a simple and inexpensive configuration.

A typical configuration of the static elimination brush according to the present invention for achieving the above object has a first straight line portion and a convex shape protruding in one direction intersecting the first straight line portion. A ground member made of a wire rod having a bent portion connected to the straight portion and a second straight portion connected to the bent portion, which extends in the intersecting direction and is folded back along the outer periphery of the first straight portion. a conductive brush member that the grounding member in electrical contact Te, to fix the conductive brush member to the grounding member, anda tape member having an adhesive property, before Symbol tape member, the conductive It is characterized in that at least one end of the brush member is exposed and adhered to the conductive brush member and the bent portion .

According to the above configuration, a simple and inexpensive static elimination brush can be provided.

It is sectional drawing which shows the structure of the image forming apparatus provided with the static elimination brush which concerns on this invention. It is a perspective explanatory view which shows the structure of the sheet discharge part of the image forming apparatus provided with the static elimination brush of 1st Embodiment. (A) is a perspective explanatory view showing the structure in which the conductive brush member is provided on the ground member in the static elimination brush of the first embodiment. (B) is a perspective explanatory view which shows the structure of the earth member of 1st Embodiment. It is sectional drawing which shows the structure of the contact part between the conductive brush member and the earth member in the static elimination brush of 1st Embodiment. It is a front explanatory view which shows the structure of the static elimination brush of 1st Embodiment. It is the bottom view which looked at the state which attached the static elimination brush of 1st Embodiment to the attachment member from the bottom. (A) is a perspective explanatory view showing the structure in which the conductive brush member is provided on the ground member in the static elimination brush of the reference example . (B) is a perspective explanatory view which shows the structure of the earth member of a reference example . It is sectional drawing which shows the structure of the contact part between the conductive brush member and the earth member in the static elimination brush of a reference example . It is a front explanatory view which shows the structure of the static elimination brush of a reference example .

An embodiment of an image forming apparatus provided with a static elimination brush according to the present invention will be specifically described with reference to the drawings.

[First Embodiment]
First, the configuration of the first embodiment of the image forming apparatus provided with the static elimination brush according to the present invention will be described with reference to FIGS. 1 to 6.

<Image forming device>
FIG. 1 is a cross-sectional explanatory view showing a configuration of an image forming apparatus provided with a static elimination brush according to the present invention. The image forming apparatus 100 shown in FIG. 1 shows an example of a laser beam printer. In FIG. 1, the image forming apparatus 100 is provided with a photosensitive drum 106 as an image carrier as an image forming means for forming an image on the sheet S.

Further, the feeding cassette 105, the feeding roller 101, and the resist roller constituting the sheet feeding section for separately feeding the sheet S one by one to the transfer nip portion N of the photosensitive drum 106 and the transfer roller 103 serving as the transfer means. 102 etc. are provided. Further, a laser scanner unit (not shown) is provided as an image exposure means for irradiating the surface of the photosensitive drum 106 with laser light according to image information.

Further, a fixing device 104 serving as a fixing means is provided. Further, a discharge tray 107 is provided above the image forming apparatus 100. The image forming process means such as the photosensitive drum 106 serving as the image forming portion is configured as a process cartridge that can be attached to and detached from the main body of the image forming apparatus 100.

The image forming process means integrally provided on the process cartridge is a photosensitive drum 106 that is an image carrier that supports an electrostatic latent image, and a charging roller that is a charging means (not shown) that uniformly charges the surface of the photosensitive drum 106. Has. Further, the figure in which a developer (toner) is supplied to an electrostatic latent image formed by irradiating the surface of a uniformly charged photosensitive drum 106 with a laser beam corresponding to image information from a laser scanner unit (not shown). It has a developing device that serves as a developing means.

The toner image formed on the surface of the photosensitive drum 106 is transferred to the sheet S by the toner supplied by a developing apparatus (not shown). After that, a cleaning device or the like as a cleaning means (not shown) for scraping and cleaning the toner remaining on the surface of the photosensitive drum 106 is provided.

Image information is sent from a personal computer or the like to the control unit of the image forming apparatus 100. The control unit that has processed the image formation from this image information emits a print signal. Then, the sheet S loaded on the elevating and lowering middle plate in the feeding cassette 105 shown in FIG. 1 is fed by the feeding roller 101. Then, in cooperation with a separating means (not shown), the sheets are separated and fed one by one and sent to the resist roller 102.

On the other hand, together with this print command, the laser beam corresponding to the image information is emitted from the laser scanner unit which is an image exposure means (not shown). Then, the surface of the photosensitive drum 106, which is an image carrier uniformly charged by a charging roller which is a charging means (not shown), is irradiated to form an electrostatic latent image. A developer (toner) is supplied to the electrostatic latent image formed on the surface of the photosensitive drum 106 from a developing device which is a developing means (not shown) to form a toner image.

The resist roller 102 conveys the sheet S to the transfer nip portion N between the photosensitive drum 106 and the transfer roller 103 as a transfer means in accordance with the position of the toner image formed on the surface of the photosensitive drum 106. A transfer bias is applied to the transfer roller 103, and the toner image formed on the surface of the photosensitive drum 106 is transferred to the sheet S. The sheet S on which the toner image is transferred is sent to a fixing device 104 serving as a fixing means, heated and pressurized, and the toner image is fixed on the sheet S.

The sheet S on which the toner image is fixed is sandwiched and conveyed by the discharge roller 202 provided in the discharge unit 20 and the driven roller 204, and is discharged onto the discharge tray 107. When forming an image on both sides of the sheet S, the sheet S sandwiched between the discharge roller 202 and the driven roller 204 from the fixing device 104 rotates in the reverse direction of the discharge roller 202 to form a double-sided path 108 at a predetermined timing. Guided and the front and back are reversed. After that, it is sandwiched and conveyed again by the resist roller 102 and conveyed to the transfer nip portion N. Then, after the image forming operation is performed in the same manner as the one-sided image forming operation, the image is discharged onto the discharge tray 107.

<Static elimination brush>
Next, the configuration of the static elimination brush unit 210, which is the static elimination brush of the present embodiment, provided in the discharge unit 20 of the image forming apparatus 100 will be described with reference to FIGS. 1 to 6. As shown in FIGS. 1 and 2, static elimination brush units 210 serving as static elimination brushes are located on the left and right sides of FIG. 2 on the downstream side in the vicinity of the ejection roller 202 and the driven roller 204 provided in the ejection unit 20 of the image forming apparatus 100. A static elimination unit 21 arranged at a location is provided.

As shown in FIGS. 1 and 2, when the sheet S is sandwiched and conveyed by the discharge roller 202 and the driven roller 204 and discharged onto the discharge tray 107, the respective conductive brushes provided in the static elimination brush units 210 are provided. The member 210a electrically contacts and slides on the seat S. At this time, the charged sheet S is discharged onto the discharge tray 107 while being statically eliminated by the conductive brush member 210a.

As shown in FIG. 2, the discharge unit 20 provided with the discharge roller 202 and the driven roller 204 has a discharge frame 201, a discharge roller 202, and a bearing (not shown) that rotatably supports the discharge roller 202. Further, it has a driven roller 204, a holder 205 that rotatably supports the driven roller 204, and a pressure spring (not shown).

Further, it has a flag 207 for detecting that the sheet S is fully loaded on the discharge tray 107, and a static elimination brush unit 210 provided with the conductive brush member 210a. Further, it is provided with a conductive ground member 211 that electrically contacts the conductive brush member 210a and supports the static elimination brush unit 210, a mounting member 212 for attaching the static elimination brush unit 210, and the like.

A rotational driving force is transmitted from a motor, which is a drive source (not shown), to the drive transmission gear 208 shown in FIG. The drive transmission gear 208 is fixed to the drive shaft 202a of the discharge roller 202. Then, the rotational driving force is transmitted from the drive transmission gear 208 to the discharge roller 202 via the drive shaft 202a, and the discharge roller 202 is rotationally driven. The driven roller 204 is pressed against the discharge roller 202 by an urging force of a pressure spring (not shown), and rotates driven by the rotation of the discharge roller 202. The sheet S is sandwiched and conveyed by the discharge roller 202 and the driven roller 204, and is discharged onto the discharge tray 107.

As shown in FIG. 5, the static elimination brush unit 210 includes a conductive brush member 210a and an adhesive tape member 210b which is an adhesive tape member. The adhesive tape member 210b of the present embodiment does not have to have conductivity. The end portion 210a1 of the conductive brush member 210a is adhered to the adhesive surface 210b1 side which is the adhesive surface of the adhesive tape member 210b. The conductive brush member 210a is made of a fine wire such as a metal or a conductive resin fiber, and is composed of a single wire or a plurality of wires.

As shown in FIG. 4, the grounding member 211 shown in FIG. 3B is composed of a wire spring (wire rod) having a circular cross section and having conductivity. A U-shaped mounting portion 211a, which is a bent portion formed by bending a part of the straight portion 211b into a U-shape, is provided at a portion of the ground member 211 to which the static elimination brush unit 210 is mounted.

The static elimination brush unit 210 shown in FIG. 5 is integrally formed with the end portion 210a1 of the conductive brush member 210a at a folding line 210c at the substantially central portion of the adhesive tape member 210b in the lateral direction (vertical direction in FIG. ), Fold it back into a U shape. Then, as shown in FIGS. 3A and 3B, the mounting portion 211a of the grounding member 211 is arranged at a substantially central position in the longitudinal direction (horizontal direction in FIG. 5) of the adhesive tape member 210b shown in FIG.

Then, the straight portions 211b on both sides of the mounting portion 211a are fitted from the upper side to the lower side in FIG. 3A. The conductive brush member 210a is attached by pressing the outer portion of the end portion 210a1 folded back in a U-turn shape with a jig or the like (not shown) and sandwiching the ground member 211.

Then, the adhesive surface 210b1 of the adhesive tape member 210b is attached to the surfaces of the straight portion 211b and the attachment portion 211a of the ground member 211. Further, the adhesive surfaces 210b1 of the adhesive tape member 210b are attached and fixed to each other except for the straight portion 211b and the mounting portion 211a of the ground member 211 and the end portion 210a1 of the conductive brush member 210a.

In the conductive brush member 210a of the present embodiment, the longitudinal direction of the conductive brush member 210a (vertical direction of FIGS. 3A and 5) is the longitudinal direction of the ground member 211 shown in FIGS. 3A and 3B. It intersects the direction (the left-right direction of FIGS. 3A and 3B). In that direction, it is folded back in a U-turn along the outer peripheral surface of the straight portion 211b of the ground member 211.

As a result, the end portion 210a1 of the conductive brush member 210a comes into electrical contact with the straight portion 211b of the grounding member 211. The outer circumference of the folded end portion 210a1 and the ground member 211 are integrally adhered by the adhesive tape member 210b.

Then, as shown in FIGS. 3A and 4, one end of the conductive brush member 210a is exposed from the adhesive tape member 210b. The parts (part) other than the straight portion 211b and the mounting portion 211a of the grounding member 211 of the adhesive tape member 210b and the conductive brush member 210a are adhered to each other with the adhesive surfaces 210b1 facing each other (adhesive surfaces). There is.

As shown in FIG. 3A, the static elimination brush unit 210 is centered on the straight portion 211b of the grounding member 211 because the adhesive tape member 210b is adhered to the mounting portion 211a which is the bending portion of the grounding member 211. Rotation is suppressed.

FIG. 4 is a cross-sectional explanatory view of a portion of the straight portion 211b in a state where the static elimination brush unit 210 is attached over the straight portion 211b and the attachment portion 211a of the ground member 211. As shown in FIG. 5, the end portions 210a1 of the two conductive brush members 210a provided on the static elimination brush unit 210 are folded back in a U-turn shape to form a straight portion 211b of the ground member 211 as shown in FIG. It is attached by making electrical contact.

As shown in FIG. 4, in the straight portion 211b of the ground member 211, the end portion 210a1 of the conductive brush member 210a to which the adhesive tape member 210b is adhered is U-turned along the outer peripheral surface of the straight portion 211b of the ground member 211. Wrap back to. Then, the end portion 210a1 of the conductive brush member 210a is bent into a U shape to sandwich the straight portion 211b of the ground member 211. Then, in a state where the end portion 210a1 of the conductive brush member 210a and the straight portion 211b of the grounding member 211 are in electrical contact, the outer periphery of the end portion 210a1 of the conductive brush member 210a is adhered to the adhesive tape member 210b. It is attached with the surface 210b1 side facing inside.

On the other hand, in the mounting portion 211a which is a bent portion formed by bending a part of the straight portion 211b of the ground member 211 into a U shape, the outer circumference of the mounting portion 211a is set on the adhesive surface 210b1 side of the adhesive tape member 210b. Stick it on the inside.

As shown in FIG. 4, the adhesive tape member 210b bent into a U shape has the adhesive tape member 210b except for the conductive brush member 210a and the straight portion 211b and the mounting portion 211a of the grounding member 211. The adhesive surfaces 210b1 are bonded to each other. Therefore, the joint strength is high.

The straight portion 211b of the grounding member 211 is in direct electrical contact with the end portion 210a1 of the conductive brush member 210a. As a result, one end exposed from the adhesive tape member 210b of each conductive brush member 210a comes into contact with the sheet S sandwiched and conveyed by the discharge roller 202 and the driven roller 204 shown in FIG. Then, the electric charge flows directly from the charged sheet S to the ground member 211 via each conductive brush member 210a.

As shown in FIG. 2, there are two mounting portions 211a formed by bending a part of the straight portion 211b of the grounding member 211 of the present embodiment into a U shape. Then, the static elimination brush unit 210 is attached to each of the attachment portions 211a. As a result, even if each conductive brush member 210a touches and slides on the sheet S sandwiched and conveyed by the discharge roller 202 and the driven roller 204, the left and right transfer balance of the sheet S shown in FIG. 2 can be balanced.

As shown in FIG. 3A, the static elimination unit 21 in which the static elimination brush unit 210 and the grounding member 211 are integrally provided is attached to the attachment member 212 shown in FIG. FIG. 6 is a bottom view of the static elimination unit 21 attached to the attachment member 212 as viewed from below. As shown in FIG. 3B, the straight portion 211b of the ground member 211 appears to be in a straight line when viewed from the front.

In the present embodiment, as shown in FIG. 6, the adhesive tape member 210b bent in a U shape is fitted and supported in the holder portion 212a provided on the mounting member 212. Then, the straight portion 211b of the ground member 211 is abutted and locked to the end surface 212b1 of the rib 212b provided at the substantially central portion of the left and right static elimination brush units 210 in FIG. 6, and the straight portion 211b of the ground member 211 is shown in FIG. Bend to the back side and the front side (vertical direction in FIG. 6) of the paper surface of (b). In such a state, it is attached to the attachment member 212 as a holding member for holding the static elimination unit 21 (static elimination brush).

Therefore, as shown in FIG. 6, in the vicinity of the adhesive tape member 210b of the static elimination brush unit 210, the adhesive tape member 210b of the static elimination brush unit 210 is pressed against the holder surface (contact surface) 212a1 of the mounting member 212. It is attached. The static elimination unit 21 (static elimination brush) is held by the mounting member (holding member) 212 in a state where the adhesive tape member 210b is pressed against the holder surface (contact surface) 212a1 of the mounting member (holding member) 212.

As a result, the electrical contact between the conductive brush member 210a and the ground member 211 is further improved. That is, the rib 212b functions as a member for pressing the static elimination brush unit 210 against the holder surface 212a1. Further, the mounting portion 211a formed by bending a part of the straight portion 211b of the ground member 211 into a U-shape suppresses the static elimination brush unit 210 from rotating around the straight portion 211b of the ground member 211. .. As a result, the angular direction in which each conductive brush member 210a contacts and slides with respect to the sheet S sandwiched and conveyed by the discharge roller 202 and the driven roller 204 shown in FIG. 2 is stabilized.

The ground member 211 is grounded by being electrically connected to a conductive member that is electrically connected to a grounded side plate (not shown). In this state, each conductive brush member 210a slides in contact with the sheet S sandwiched and conveyed by the discharge roller 202 and the driven roller 204 shown in FIG. As a result, electric charges flow from the charged sheet S via the conductive brush member 210a, the ground member 211, the conductive member (not shown), and the side plate, and the sheet S is statically eliminated.

In the present embodiment, the end portion 210a1 of the conductive brush member 210a folded back in a U-turn shape is directly electrically contacted with the straight portion 211b of the ground member 211. Then, the straight portion 211b of the grounding member 211, the mounting portion 211a, and the end portion 210a1 of the conductive brush member 210a are integrally adhered and fixed by the adhesive tape member 210b. This makes it possible to provide a simple and inexpensive static elimination brush.

The ground member 211 has an excellent degree of freedom because the shape of the end portion 211c can be matched with the shape of each part of the image forming apparatus 100 in order to electrically connect to an appropriate grounding place.

[ Reference example ]
Next, the configuration of the reference example of an image forming apparatus having a dividing electrostatic brush will be described with reference to FIGS. It should be noted that the same components as those in the first embodiment are designated by the same reference numerals or the same member names even if the reference numerals are different, and the description thereof will be omitted.

In the first embodiment, as shown in FIG. 4, the grounding member 211 is formed of a wire spring having a circular cross section, and as shown in FIG. 5, the adhesive tape member 210b is attached to the end portion 210a1 of the conductive brush member 210a. I stuck it.

In this reference example , as shown in FIG. 8, the ground member 311 is composed of a conductive sheet metal having a rectangular cross section. Then, as shown in FIG. 9, the sheet member 310b is attached to the central portion 310a1 of the conductive brush member 310a via the adhesive double-sided tape member 310c which is a tape member having adhesiveness. The adhesive double-sided tape member 310c and the sheet member 310b of this reference example do not have to have conductivity.

As shown in FIG. 9, the static elimination brush unit 310, which is the static elimination brush of this reference example , includes two conductive brush members 310a, a sheet member 310b, and an adhesive double-sided tape member 310c. .. As shown in FIG. 7A, the static elimination brush unit 310 is provided at a substantially central portion of the adhesive double-sided tape member 310c and the sheet member 310b shown in FIG. 9 in the lateral direction (vertical direction in FIG. 9). Fold it back into a U shape.

Then, it is fitted to the ground member 311 made of a conductive sheet metal having a rectangular cross section shown in FIG. 7 (b) from the upper side to the lower side in FIG. 7 (a). The conductive brush member 310a is attached by pressing the outer portion of the central portion 310a1 folded back in a U-turn shape with a jig or the like (not shown) and sandwiching the ground member 311.

Then, the adhesive surface 310c1 of the adhesive double-sided tape member 310c is attached to and fixed to the surface of the ground member 311. Both ends of the conductive brush member 310a are exposed from the adhesive double-sided tape member 310c and the sheet member 310b.

The conductive brush member 310a of this reference example has an outer circumference of the ground member 311 in a direction in which the longitudinal direction shown in the vertical direction of FIG. 9 intersects the longitudinal direction shown in the horizontal direction of FIG. 7 (b) of the ground member 311. Fold it back in a U-turn along the surface. As a result, the central portion 310a1 of the conductive brush member 310a comes into electrical contact with the ground member 311. The outer circumference of the folded central portion 310a1 and the grounding member 311 are integrally bonded by the adhesive double-sided tape member 310c.

FIG. 8 is a cross-sectional explanatory view of a portion of the conductive brush member 310a in a state where the static elimination brush unit 310 is attached to the ground member 311 as shown in FIG. 7A. The sheet member 310b and the adhesive double-sided tape member 310c are integrally bent in a U shape with the central portion 310a1 of the conductive brush member 310a, and the ground member 311 is sandwiched by the central portion 310a1 of the conductive brush member 310a. .. As a result, the central portion 310a1 of the conductive brush member 310a and the ground member 311 are in electrical contact with each other.

The ground member 311 and the central portion 310a1 of the conductive brush member 310a are in direct electrical contact with each other. As a result, as in the first embodiment shown in FIG. 2, when each conductive brush member 310a comes into contact with the sheet S sandwiched and conveyed by the discharge roller 202 and the driven roller 204, each conductive brush member from the charged sheet S Charges flow directly to the ground member 311 via 310a.

As shown in FIG. 7A, the grounding member 311 of this reference example is provided with two static elimination brush units 310. As a result, as in the first embodiment shown in FIG. 2, FIG. 2 of the sheet S which is conveyed even if each conductive brush member 310a is contacted and slid to the sheet S which is sandwiched and conveyed by the discharge roller 202 and the driven roller 204. The left and right transports can be balanced.

As shown in FIG. 7A, the static elimination unit 31 in which the static elimination brush unit 310 and the grounding member 311 are integrally provided is attached to the mounting member 212 in substantially the same manner as in the first embodiment shown in FIG. ing. As shown in FIG. 8, since the non-adhesive sheet member 310b is attached to the adhesive surface 310c1 on the outer side of the adhesive double-sided tape member 310c, even when the static elimination brush unit 310 is attached to the attachment member 212. There is no problem.

The ground member 311 is grounded by being electrically connected to a conductive member that is electrically connected to a grounded side plate (not shown). In this state, each conductive brush member 310a slides in contact with the sheet S sandwiched and conveyed by the discharge roller 202 and the driven roller 204 shown in FIG. As a result, electric charges flow from the charged sheet S via the conductive brush member 310a, the ground member 311 and further, the conductive member and the side plate (not shown), and the sheet S is statically eliminated. This makes it possible to provide a simple and inexpensive static elimination brush.

Instead of the adhesive tape member 210b of the first embodiment, a tape member having weak adhesiveness or a sheet member 310b having no adhesiveness as in this reference example and an adhesive material such as the adhesive double-sided tape member 310c are used. Even if it is configured, the same effect as that of the first embodiment can be obtained.

Further, in this reference example , both ends of the conductive brush member 310a are contact-sliding on the sheet S sandwiched and conveyed by the discharge roller 202 and the driven roller 204 to eliminate static electricity. As a result, the static elimination effect can be enhanced by using less conductive brush member 310a. The other configurations are the same as those in the first embodiment, and the same effects can be obtained.

210… Static elimination brush unit (static elimination brush)
210a ... Conductive brush member
210b ... Adhesive tape member (tape member)
211… Earth member

Claims (6)

A first straight line portion, a bent portion connected to the first straight line portion having a convex shape protruding in one direction in a direction intersecting the first straight line portion, and a second straight line portion connected to the bent portion. And the earth member composed of the wire rod having
A conductive brush member that extends in the intersecting direction and folds back along the outer circumference of the first straight line portion to electrically contact the ground member .
An adhesive tape member that fixes the conductive brush member to the ground member ,
Have ,
Before Symbol tape member, discharging brush which is characterized in that it is bonded to the bent portion and the conductive brush member, at least one end so as to expose the conductive brush member. The tape members extend from one side to the other in the intersecting direction, fold back along the outer circumference of the first straight line portion, extend from the other side to the one side, and face each other with adhesive surfaces. The static elimination brush according to claim 1, wherein the brush is adhered to the brush. The static elimination brush according to claim 1 or 2, wherein both ends of the conductive brush member are exposed from the tape member. The static elimination brush according to any one of claims 1 to 3 and
An image forming means for forming an image on a sheet and
An image forming apparatus characterized by having. The static elimination brush is provided on the downstream side in the sheet discharge direction in the vicinity of the discharge rotating body provided in the sheet discharging portion of the image forming apparatus and the driven rotating body that is driven by the rotation of the discharging rotating body, and is provided on the downstream side in the sheet discharging direction. The image according to claim 4, wherein at least one end of the conductive brush member exposed from the tape member comes into contact with the sheet sandwiched and discharged by the driven rotating body and the driven rotating body to eliminate static electricity. Forming device . The image forming apparatus according to claim 5, wherein the static eliminator brushes are arranged at two locations along the axial direction of the discharge rotating body .

Images