JP6210205B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus provided with a paper dust removing roller.

  As an image forming apparatus such as a laser printer or a digital copying machine, an image forming apparatus provided with a paper dust removing roller for removing paper dust attached to paper fed by a paper feeding roller is known.

  As this type of image forming apparatus, for example, Patent Document 1 describes an image forming apparatus provided with a plurality of members configured to be grounded around a paper dust removing roller. More specifically, the image forming apparatus described in Patent Document 1 includes a spiral roller that conveys the paper dust removed by the paper dust removing roller. In order to convey paper dust satisfactorily, the spiral roller uses the metal shaft of the spiral roller and the side surface of the spiral tooth as a conductive material, and is grounded from the conductive portion. Further, the cover of the paper dust collecting unit that collects the paper dust conveyed by the spiral roller and the static elimination member that neutralizes the conveyed paper dust are also configured to be grounded.

JP 2009-298559 A

  By the way, in the image forming apparatus described in Patent Document 1, a plurality of members to be grounded are disposed including a paper dust removing roller. In this way, when a plurality of members are arranged at various positions, the configuration for grounding each member may be complicated.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an image forming apparatus that can simply configure a paper dust removing roller of a paper feeding unit and a ground path of a conductive member on one side of a frame.

  An image forming apparatus according to the present invention for solving the above-described problems includes a paper dust removing roller that removes paper dust adhering to a conveyed paper, and a conductive bearing made of a conductive resin that supports the paper dust removing roller. Conductive to a frame that supports the conductive bearing, a first wire that is supported by the frame and that conducts to a conductive member that functions to remove paper dust or transport paper, and an earth member that takes the ground of the device body that supports the frame And a second wire. The conductive bearing integrally includes a holding portion for holding the first wire and the second wire. The first wire and the second wire are brought into contact with each other at the holding portion.

  In this image forming apparatus, in a holding portion that is integrally provided in a conductive bearing that pivotally supports a paper dust removing roller, a first wire that is connected to the conductive member and a first member that is connected to a ground member that grounds the apparatus main body. Since the two wires come into contact with each other and are conducted, the ground path of the paper dust removing roller and the ground path of the conductive member are simply configured on one side of the frame.

  In the image forming apparatus described above, it is preferable that the holding portion is formed in a substantially U shape having an open end and a closed end. In this case, it is preferable that the holding portion has an inclined surface that is inclined so that the inner space becomes narrower from the open end toward the closed end. And it is preferable that the one end side of a 1st wire and the one end side of a 2nd wire are urged | biased toward the closed end from the open end of a holding | maintenance part.

  The conductive bearing and the frame that supports the conductive member serve as a conductive member that supports the conductive bearing and is disposed so as to guide a pair of support wall portions facing each other and a sheet conveyed inside the pair of support wall portions. A chute sheet metal can be provided. In this case, the holding portion is disposed outside the support wall portion on one side of the frame, and the other end portion of the first wire extends inside the support wall portion on one side of the frame and is electrically connected to the chute sheet metal.

  The image forming apparatus can include a registration roller that is supported by the frame and faces the paper dust removing roller, and a third wire that is electrically connected to the registration roller and the ground member. In this case, since the third wire and the second wire are configured to contact each other, the second wire is electrically connected to the ground member via the third wire.

  Here, the other end portion of the second wire may have a structure having a hook for conduction that engages and conducts with an intermediate portion of the third wire. In this case, it is preferable that the frame is provided with a restricting portion for restricting the movement of the intermediate portion of the third wire in the direction orthogonal to the extending direction of the intermediate portion.

  The second wire has a structure having a fulcrum portion that abuts against a contact surface formed on the frame, and a force point portion that is disposed away from the contact surface on the opposite side of the fulcrum portion from the conduction hook. Can do. In this case, the conduction wire is lifted by pressing the force point with the second wire pressed against the contact surface of the frame, so that the conduction hook is engaged with the intermediate portion of the third wire. Combine work becomes easy.

  Here, it is preferable that the third wire has a spring portion that elastically contacts the ground member.

  According to the image forming apparatus of the present invention, in the holding portion that is integrally provided with the conductive bearing that pivotally supports the paper dust removing roller, the first wire that is electrically connected to the conductive member and the ground member that grounds the apparatus main body. Therefore, the ground path of the paper dust removing roller and the ground path of the conductive member can be simply configured on one side of the frame.

1 is a side sectional view showing a schematic configuration of a color printer as an image forming apparatus according to an embodiment of the present invention. FIG. 2 is a perspective view showing an overview of a paper feeding unit in which a paper dust removing roller and a registration roller of the paper feeding unit shown in FIG. FIG. 3 is a perspective view showing a conductive bearing and a chute sheet metal supported by a paper feed frame shown in FIG. 2 together with a paper dust removing roller and a registration roller. FIG. 4 is another perspective view showing the conductive bearing and chute sheet metal shown in FIG. 3 together with a paper dust removing roller and a registration roller. It is a perspective view which expands and shows the shape of the 1st wire, 2nd wire, and 3rd wire which were shown in FIG. It is a perspective view which expands and shows the shape of the 1st wire and 2nd wire which were shown in FIG. FIG. 3 is a partial perspective view showing an enlarged right rear portion of the paper feed frame shown in FIG. 2. The state just before one end part of a 2nd wire is latched by the holding | maintenance part shown in FIG. 6 is shown, (a) is a perspective view of holding | maintenance part vicinity, (b) is sectional drawing of a holding | maintenance part. FIG. 6 shows a state in which one end of the second wire is locked to the holding part shown in FIG. 6, (a) is a perspective view of the vicinity of the holding part, and (b) is a sectional view of the holding part. 5 shows the progress of the operation of engaging the second wire conduction hook shown in FIG. 5 with the engaged portion of the third wire, (a) is a front view showing a state before the operation, and (b) is in the middle of the operation. (C) is a front view which shows the state after work. It is explanatory drawing which shows operation to the 2nd wire in the middle of the operation | work shown to (b) of FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of an image forming apparatus according to the invention will be described in detail with reference to the drawings as appropriate. An image forming apparatus according to an embodiment is embodied as a color printer 1 as illustrated in FIG. 1, for example. In the following description, the side facing the user who uses the color printer 1, that is, the left side of the sheet of FIG. 1 is “front”, the right side is “rear”, the vertical direction is “up / down”, and the front side is “ “Right” and the back side “Left”.

<Schematic configuration of color printer>
As shown in FIG. 1, the color printer 1 includes a paper feeding unit 20 disposed at the lower part in the main body frame 10, an image forming unit 30 disposed at the upper part in the main body frame 10, and a rear part in the main body frame 10. The fixing unit 80 and the paper discharge unit 90 are mainly provided. An upper cover 12 is provided on the upper side of the main body frame 10 so as to be openable and closable with the rear side as a rotation center.

  The paper feeding unit 20 includes a paper tray 21 that accommodates the paper S, a paper pressing plate 22 that biases the paper S upward, and a paper feed roller 23 that feeds the paper S biased upward by frictional contact forward. , A separation roller 24 and a separation pad 25 for separating the fed sheets S one by one. Further, on the downstream side of the paper feeding unit 20, there are a conveyance roller 26, a pinch roller 27, a paper dust removing roller 28, and a registration roller 29 as a conveyance unit for reversing and conveying the paper S from the upper side to the rear side. Has been placed.

  In the paper feed unit 20, the paper S stored in the paper tray 21 is fed forward as the paper feed roller 23 rotates and separated one by one by the separation roller 24 and the separation pad 25. Then, the sheet S is conveyed upward by the conveying roller 26 and the pinch roller 27 of the conveying unit, and conveyed to the rear image forming unit 30 side by the paper dust removing roller 28 and the registration roller 29.

  In the process of transporting the paper S by the transport unit, the paper dust removing roller 28 absorbs and collects the paper powder adhering to the transported paper S due to static electricity due to frictional charging. Further, the registration roller 29 corrects the skew of the sheet S conveyed to the image forming unit 30 side.

  The image forming unit 30 mainly includes four LED units 40, four process cartridges 50, and a transfer unit 70. Each process cartridge 50 includes a photoconductor cartridge 51 and a developing cartridge 61 that is detachably attached to the photoconductor cartridge 51.

  The LED unit 40 is disposed above the photosensitive drum 53 and includes a plurality of LEDs (light emitting diodes) (not shown) arranged in the left-right direction at the lower end thereof. The LED unit 40 exposes the surface of the photosensitive drum 53 by blinking the LED based on the image data. The LED unit 40 is held by the upper cover 12 and is separated from the photosensitive drum 53 by opening the upper cover 12.

  A plurality of process cartridges 50 are arranged side by side in the front-rear direction between the upper cover 12 and the paper feed tray 21, and are exchangeably mounted on the main body frame 10 in a state where the upper cover 12 is opened. It is the composition which becomes.

  Each photoconductor cartridge 51 mainly includes a photoconductor drum 53, a charger 54, and a collection roller 55. The collection roller 55 is a roller for collecting the transfer residual toner attached on the photosensitive drum 53.

  Each developing cartridge 61 mainly includes a developing roller 63, a supply roller 64, a layer thickness regulating blade 65, an agitator 66, and a storage portion 67 that stores positively charged toner. ing.

  The transfer unit 70 is provided between the paper feed tray 21 and the process cartridge 50, and mainly includes a driving roller 71, a driven roller 72, an endless conveyance belt 73, and four transfer rollers 74. ing. The conveying belt 73 is stretched between the driving roller 71 and the driven roller 72 so that the outer surface faces each of the arranged photosensitive drums 53. Each transfer roller 74 is arranged inside the conveyor belt 73 so as to sandwich the conveyor belt 73 between the photosensitive drums 53.

  The fixing unit 80 is provided behind the four process cartridges 50 of the image forming unit 30. The fixing unit 80 includes a heating roller 81 for heating the paper S and a pressure roller 82 for pressing the paper S between the heating roller 81. The heating roller 81 and the pressure roller 82 are rotatably supported by the fixing unit frame 83.

  The paper discharge unit 90 is provided continuously behind the fixing unit 80. The paper discharge unit 90 includes a conveyance roller 93 for conveying at least the paper S conveyed from the fixing unit 80 to the discharge port 92 along the paper discharge path 91, and the paper S from the discharge port 92 onto the paper discharge tray 13. A discharge roller 94 for discharging the paper is rotatably supported on the paper discharge unit frame 95.

  In the image forming unit 30, the surface of the photosensitive drum 53 is uniformly positively charged by the charger 54 and then exposed by the LED unit 40, whereby the electrostatic latent image based on the image data is formed on the photosensitive drum 53. Is formed. Further, the toner in the container 67 is supplied to the developing roller 63 to which the developing bias is applied via the supply roller 64 while being agitated by the agitator 66, and enters between the developing roller 63 and the layer thickness regulating blade 65. Then, it is carried on the developing roller 63 as a thin layer having a constant thickness. When the developing roller 63 comes into contact with the photosensitive drum 53, toner is supplied from the developing roller 63 to the photosensitive drum 53, whereby the electrostatic latent image is visualized and developed on the photosensitive drum 53. A toner image as an agent image is formed.

  Thereafter, the sheet S supplied to the image forming unit 30 is conveyed between the photosensitive drum 53 and the conveying belt 73, so that the toner image formed on the photosensitive drum 53 is transferred onto the sheet S. . The sheet S to which the toner image has been transferred is conveyed to the fixing unit 80, and the toner image is thermally fixed while passing between the heating roller 81 and the pressure roller 82, whereby an image is formed on the sheet S. The The sheet S on which the image is formed is transported along the paper discharge path 91 by the transport roller 93 and the discharge roller 94, passes through the discharge port 92 of the paper discharge unit frame 95, and is discharged from the main body frame 10. 13 is discharged.

<Detailed structure of paper feed unit>
As shown in FIG. 2, the paper dust removing roller 28 and the registration roller 29 are rotatably supported by the conveyance unit frame 101 in a state of facing each other in parallel. As a structure for that purpose, a left support wall portion 101C protruding upward along the front-rear direction is integrally formed on the left frame portion 101A constituting the left portion of the transport portion frame 101, and the right portion of the transport portion frame 101 is A right support wall portion 101D that protrudes upward along the front-rear direction is integrally formed with the right frame portion 101B that is configured.

  The left support wall portion 101C and the right support wall portion 101D face each other with the paper dust removing roller 28 and the registration roller 29 interposed therebetween. And the conveyance part which supported the paper dust removal roller 28 and the registration roller 29 rotatably between the left side support wall part 101C of 101 A of left frame parts of the conveyance part frame 101, and the right side support wall part 101D of the right frame part 101B. The unit 100 is mounted between a left main body frame (not shown) and a right main body frame in the main body frame 10. The left main body frame and the right main body frame are made of an insulating synthetic resin.

  Here, as shown in FIGS. 3 and 4, the right end of the paper dust removing roller 28 is rotatably supported by a conductive bearing 102 made of conductive resin, and the left end of the paper dust removing roller 28 is It is rotatably supported by a bearing (not shown) made of an insulating resin.

  On the other hand, the right end portion of the registration roller 29 is rotatably supported by a conductive metal bearing 103. One end portion of a coiled earth member 109 formed by winding a conductive wire in a coil shape is brought into pressure contact with the metal bearing 103 to be conductive.

  Here, the sheet S conveyed between the paper dust removing roller 28 and the registration roller 29 rotatably supported between the left support wall portion 101C and the right support wall portion 101D shown in FIG. 2 is guided. Therefore, as shown in FIGS. 1 and 3, a chute sheet metal 104 is disposed below the front side of the paper dust removing roller 28 and the registration roller 29. The chute metal plate 104 has a function of removing static electricity accumulated on the paper S as a conductive member.

  The conductive bearing 102 for the paper dust removing roller 28 and the metal bearing 103 for the registration roller 29 shown in FIG. 3 are opposite to the inside facing the left support wall 101C in the right support wall 101D shown in FIG. Arranged outside and supported by the right frame portion 101B. Further, the chute sheet metal 104 as the conductive member is disposed inside both the left support wall portion 101C and the right support wall portion 101D and is supported by the transport unit frame 101.

  Here, as shown in FIG. 2, a first wire made of conductive metal for forming a ground path for the paper dust removing roller 28, the chute sheet metal 104, and the resist roller 29 is provided at the right end of the conveying unit frame 101. 105, a second wire 106, and a third wire 107 are disposed.

  The first wire 105 is a wire that is conducted to a chute sheet metal 104 as a conductive member, and is wound around the outer periphery of the conductive bearing 102 as shown in FIGS. The paper dust removing roller 28 is also conducted.

  The conductive bearing 102 is integrally formed with a holding portion 108 having a U-shaped cross section. The one end portion 105A of the first wire 105 is locked to the conductive holding portion 108. In FIG. 6, for convenience, one end portion 105 </ b> A of the first wire 105 is illustrated as being removed from the holding portion 108. The holding portion 108 is provided outside the right support wall portion 101D shown in FIG. Then, the other end portion 105B of the first wire 105 is bent as shown in FIG. 6 so that it can be bent from the outside of the right support wall portion 101D through the through hole 101M formed in the right support wall portion 101D shown in FIG. It extends inward and is conducted to the chute sheet metal 104 as shown in FIG.

  The second wire 106 is a coil that is electrically connected to a later-described ground metal plate 110 provided as a ground member on the main body frame 10 of the color printer 1. As shown in FIGS. 5 and 6, the second wire 106 is electrically connected to the one end portion 105 </ b> A of the first wire 105 with the one end portion 106 </ b> A engaged with the holding portion 108. At the other end of the second wire 106, a conduction hook 106B is formed for engaging and conducting with the engaged portion 107D of the third wire 107.

  As shown in FIGS. 8A and 8B, the holding portion 108 has a substantially U shape having an open end 108C that opens downward and an upper closed end 108D, that is, an upside down U shape. It is formed in a letter-shaped or V-shaped cross-sectional shape. And this holding | maintenance part 108 has an inclined surface inclined so that inner space may become narrow as it approaches the closed end 108D from the open end 108C. That is, the inner surface of the holding portion 108 has a substantially vertical holding surface 108A and a guide slope 108B of about 45 degrees in which the interval between the holding surface 108A gradually narrows upward.

  In the vicinity of the one end portion 106A of the second wire 106, a coil portion 106C for imparting spring elasticity to the one end portion 106A is formed. A coil portion 106D for imparting spring elasticity to the conduction hook 106B is formed on the other end portion side of the second wire 106. Then, in the portion between the conduction hook 106B of the second wire 106 and the coil portion 106D, the conduction hook 106B is operated so that it can be easily engaged with the engaged portion 107D of the third wire 107. A force point portion 106E and a fulcrum portion 106F are formed.

  Here, as shown in FIG. 11, the second wire 106 is in contact with the contact surface 101 </ b> H in a state where the coil portion 106 </ b> D is fitted to the support protrusion 101 </ b> K protruding from the contact surface 101 </ b> H of the transport unit frame 101. And a force point portion 106E which is spaced apart from the contact surface 101H and bent in a U shape on the opposite side of the fulcrum portion 106F from the conduction hook 106B.

  As shown in FIGS. 4 and 5, the third wire 107 is a wire for constituting the ground path of the registration roller 29, and is formed by bending a conducting portion 107 </ b> A at one end portion into a U-shape, and at the other end portion. A coiled ground portion 107B is formed by winding it in the shape of a coil spring, and a contact surface portion 107C is formed by bending it in a U shape between the conducting portion 107A and the coiled ground portion 107B.

  As shown in FIG. 7, the conducting portion 107A at one end portion of the third wire 107 is between the other end portion of the coiled ground member 109 and the support seat portion 101C of the transfer portion frame 101 that supports the other end portion. Between the other ends of the coiled ground member 109.

  On the other hand, the coiled ground portion 107B at the other end of the third wire 107 is wound and positioned on a support protrusion 101J protruding from the contact surface 101H of the right frame portion 101B. As shown in FIG. 7, the coiled ground portion 107 </ b> B is provided with respect to a grounding metal plate 110 as an example of a grounding member that is provided on the main body frame 10 of the color printer 1 shown in FIG. 1 and is electrically grounded. As a spring part, it is elastically contacted and conducted.

  Here, as shown in FIG. 7, an intermediate portion of the third wire 107 is formed with a contact surface portion 107 </ b> C that bends in a U shape and protrudes to the right side, and a bent portion 107 </ b> F that bends in an L shape on the left side. Yes. The bent portion 107F includes a front / rear portion 107E extending in the front / rear direction continuously to the contact surface portion 107C, and an engaged portion 107D extending in the left / right direction.

  The right frame portion 101B has a first protrusion 101E and a second protrusion as a restricting portion for restricting the bent portion 107F of the intermediate portion of the third wire from moving in the direction orthogonal to the extending direction. 101G is integrally formed.

  The first protrusion 101E restricts the vertical movement by sandwiching the front and rear portion 107E of the third wire 107 between the first clamping surface 101D extending along the front and rear and right and left directions of the transport unit frame 101. On the other hand, the second projection 101G sandwiches the engaged portion 107D of the third wire 107 between the second clamping surface 101F spreading along the up / down / left / right direction of the transport unit frame 101 to restrict the movement in the front / rear direction. Yes. In this state, the contact surface portion 107C of the third wire 107 is in contact with the first clamping surface 101D.

<Effects of paper feeding unit>
In the color printer 1 that is the image forming apparatus of the present embodiment, in constructing the ground path of the paper dust removing roller 28, the chute sheet metal 104, and the registration roller 29 of the transport unit 100, first, the procedure shown in FIGS. Thus, the one end portion 105A of the first wire 105 and the one end portion 106A of the second wire 106 are made conductive. Further, the conduction hook 106B at the other end of the second wire 106 is engaged with the engaged portion 107D of the third wire 107 by the procedure shown in FIG.

  Specifically, in conducting the electrical connection between the one end portion 105A of the first wire 105 and the one end portion 106A of the second wire 106, first, the one end portion 105A of the first wire 105 is connected to the holding portion 108 as shown in FIG. It inserts between 108 A of clamping surfaces and the guide slope 108B from an open end. As a result, the one end portion 105A of the first wire 105 is locked inside the holding portion 108 while being biased from the open end of the holding portion 108 toward the closed end of the holding portion 108 by the spring elasticity of rewinding. .

  Subsequently, as shown in FIG. 9, the one end portion 106 </ b> A of the second wire 106 is inserted between the holding surface 108 </ b> A and the guide slope 108 </ b> B from the open end of the holding portion 108. As a result, the one end portion 106A of the second wire 106 is locked inside the holding portion 108 in a state of being biased from the open end of the holding portion 108 toward the closed end of the upper portion by the spring elasticity of the loop portion 106C. The

  At that time, the one end portion 106A of the second wire 106 is guided to the one end portion 105A side of the first wire 105 along the guide slope 108B of the holding portion 108, and thus the one end portion 106A of the second wire 106 is guided to the first wire 105. The one end portion 105A is strongly pressed and reliably connected.

  Next, in engaging the engaging hook 106B at the other end of the second wire 106 with the engaged portion 107D of the third wire 107, first, as shown in FIG. The force point portion 106E of the wire 106 is placed below the coiled ground portion 107B, and from this position, the force point portion 106E is pushed upward along the contact surface 101H as shown in FIG.

  Then, as shown in FIG. 10C, the conduction hook 106B of the second wire 106 is engaged with the engaged portion 107D of the third wire 107 from above. Thus, the conduction hook 106B of the second wire 106 is strongly pressed against the engaged portion 107D of the third wire 107 by the spring elasticity applied from the loop portion 106D, and is reliably conducted.

  Here, in the work shown in FIG. 10 (b), as shown in FIG. 11, the fulcrum portion 106F of the second wire 106 is brought into contact with the contact surface 101H of the transport unit frame 101, and from this state, the force point portion is obtained. 106E is pressed in the direction of the arrow toward the contact surface 101H. Then, the conduction hook 106B of the second wire 106 is lifted away from the contact surface 101H, so that the conduction hook 106B of the second wire 106 is connected to the third wire 107 as shown in FIG. The operation of engaging the engaged portion 107D from above is facilitated.

  Here, one end 105A of the first wire 105 whose other end is connected to the chute sheet metal 104 is strongly pressed by the second wire 106 one end 106A, and is reliably connected. 106B is strongly pressed against the engaged portion 107D of the third wire 107 and reliably conducts, whereby the paper dust removing roller 28 passes through the conductive bearing 102, the first wire 105, the second wire 106, and the third wire 107. Thus, a ground path to the coiled ground portion 107B is configured. Further, a ground path is formed from the chute sheet metal 104 to the coiled ground portion 107B via the first wire 105, the second wire 106, and the third wire 107. Furthermore, an earth path is formed from the registration roller 29 to the coiled earth portion 107B via the metal bearing 103, the coiled earth member 109, and the third wire 107.

  As described above, according to the color printer 1 of the present embodiment, in the holding unit 108 provided integrally with the conductive bearing 102, the one end portion 105A of the first wire 105 and the one end portion 106A of the second wire 106 are strong. And the conductive hook 106B at the other end of the second wire 106 and the engaged portion 107D of the third wire 107 are firmly connected, so that the paper dust removing roller 28 and the chute sheet metal 104 are The ground path can be simply configured on one side of the transfer unit frame 101, for example, on the right frame unit 101B side.

  Here, in the color printer 1 of the present embodiment, the cross-sectional shape of the holding unit 108 illustrated in FIG. 8 may be a narrow inverted V-shaped cross-sectional shape.

  The color printer 1 according to the embodiment of the image forming apparatus according to the present invention has been described above. However, the image forming apparatus according to the present invention is not limited to the color printer 1 according to the embodiment. It can be applied to a machine, a multifunction machine, etc.

DESCRIPTION OF SYMBOLS 1 Color printer S Paper 10 Main body frame 20 Paper feed part 28 Paper dust-removing roller 29 Registration roller 30 Image formation part 80 Fixing part 90 Paper discharge part 100 Conveyance part unit 101 Conveyance part frame 101A Left frame part 101B Right frame part 101C Left side support Wall part 101D Right support wall part 101E 1st protrusion (regulation part)
101G 2nd projection (regulator)
101H Contact surface 102 Conductive bearing 103 Metal bearing 104 Chute metal plate 105 First wire 105A One end portion 105B Other end portion 106 Second wire 106A One end portion 106B Conductive hook 106E Force point portion 106F Support point portion 107 Third wire 107B Coiled earth portion (Spring part)
108 Holding part 108A Holding surface 108B Guide slope

Claims (9)

A paper dust removing roller that removes paper dust adhering to the conveyed paper;
A conductive bearing made of a conductive resin that pivotally supports the paper dust removing roller;
A frame for supporting the conductive bearing;
A first wire supported by the frame and conducted to a conductive member having a function of paper dust removal or paper conveyance;
A second wire connected to a grounding member for grounding the apparatus main body on which the frame is supported;
The conductive bearing integrally includes a holding portion for holding the first wire and the second wire,
The image forming apparatus, wherein the first wire and the second wire are brought into contact with each other at the holding portion. The holding portion is formed in a substantially U shape having an open end and a closed end,
2. The image formation according to claim 1, wherein one end side of the first wire and one end side of the second wire are urged and held from an open end of the holding portion toward a closed end. apparatus. The image forming apparatus according to claim 2 , wherein the holding portion has an inclined surface that is inclined so that an inner space becomes narrower from the open end toward the closed end. The frame supports the conductive bearing and a pair of support wall portions facing each other;
A chute sheet metal as the conductive member disposed so as to guide the paper conveyed inside the pair of support walls,
The holding portion is disposed outside the support wall portion in the frame,
The other end portion of the first wire extends inward of the support wall portion in the frame and is electrically connected to the chute sheet metal according to any one of claims 1 to 3. Image forming apparatus. A registration roller supported by the frame and facing the paper dust removing roller;
A third wire conducted to the registration roller,
The image forming apparatus according to claim 1, wherein the third wire and the second wire are configured to conduct.   The image forming apparatus according to claim 5, wherein the other end portion of the second wire has a conduction hook that is engaged with and electrically connected to an intermediate portion of the third wire.   The image according to claim 6, wherein a restriction portion for restricting movement of the intermediate portion of the third wire in a direction orthogonal to the extending direction of the intermediate portion is provided in the frame. Forming equipment.   The second wire has a fulcrum portion that abuts against an abutment surface formed on the frame, and a force point portion that is disposed away from the abutment surface on the side opposite to the conduction hook from the fulcrum portion. The image forming apparatus according to claim 6, wherein the image forming apparatus is an image forming apparatus.   The image forming apparatus according to claim 5, wherein the third wire includes a spring portion that elastically contacts the ground member.

Images