Image formation device

Abstract

To provide an image formation device which enables a bundle wire to be arranged between an electric member disposed on the front surface side and an electric member disposed at the back surface side without increasing the size of the device.SOLUTION: In an image formation device, a rotation space 2900 is secured below a pre-image forming conveyance unit 2400 in a housing 2100 to enable a conveyance unit 2410 to be moved. A wire bundle 2530 is routed from the rear to the front of the housing 2100 in a space 2910 below the conveyance unit 2410 in a separated position. The size of the space 2910 is changed according to the rotation space 2900 of the conveyance unit 2410 which is secured in the housing 2100. The space in the housing 2100, which includes a part of the rotation space 2900 preset in the housing 2100 for rotation of the conveyance unit 2410, can be effectively utilized as the space 2910 for routing the wire bundle 2530. Thus, the wire bundle 2530 can be disposed without increasing the size of the device.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an image forming apparatus such as a printer, a copier, a facsimile, or a multifunction machine. [Background technology]

[0002] Conventionally, image forming apparatuses such as printers, copiers, facsimiles, and multifunction machines are provided with various boards, such as high-voltage boards and control boards, to control electrical components such as various motors, various sensors, and switches. These boards are mainly arranged on the rear side of the image forming apparatus, and electrical components electrically connected to the boards by cable are also often arranged on the rear side of the image forming apparatus. However, due to the arrangement of each unit housed in the image forming apparatus, it may be difficult to gather electrical components including the boards on the rear side, and in that case, some electrical components have to be arranged on the front side. Even in such cases, it is necessary to connect the electrical components by cable in a space-saving manner in order to make it easier for workers to replace and maintain the electrical components and to realize a compact device. Conventionally, a configuration has been proposed in which electrical components arranged on the front side and electrical components arranged on the rear side are electrically connected via a cable relay unit (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2022-175261 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, image forming apparatuses used in commercial printing tend to use more electrical components because of the demand for higher speed and higher printing accuracy. In addition, image forming apparatuses used in commercial printing often have other housings connected to the side, making it difficult to access these electrical components from the side. Therefore, replacement and maintenance of electrical components is generally performed from the front side, which is easier to access. In such cases, it is necessary to run wires from the electrical components arranged on the front side to the electrical components arranged on the back side. However, as the number of electrical components increases, the number of wires for supplying power and transmitting electrical signals also increases. Conventionally, a large space was required to run the wires, and there was a risk that the device would become larger in size in order to secure the space.

[0005] The present invention has been made in consideration of the above-mentioned problems, and aims to provide an image forming apparatus in which a cable can be arranged between an electrical component arranged on the front side and an electrical component arranged on the rear side without increasing the size of the apparatus. [Means for solving the problem]

[0006] An image forming apparatus according to one embodiment of the present invention comprises a housing having an image forming unit that forms an image on a sheet, a transport unit that transports the sheet in a transport direction along a first direction, a first frame arranged on a first side of the transport unit in a second direction intersecting the first direction, and a second frame arranged on a second side opposite the first side of the transport unit in the second direction, a first electrical member arranged in the first frame of the housing, a second electrical member arranged in the second frame of the housing, and a cable that electrically connects the first electrical member and the second electrical member, wherein the transport unit is movable between a first position for transporting a sheet and a second position different from the first position in a third direction perpendicular to an image forming surface of the transported sheet, and is connected to a first space which is a movement range of the transport unit, and the cable is arranged in a second space on the opposite side to the first position based on the transport unit when in the second position. Effect of the Invention

[0007] According to the present invention, it is possible to provide an image forming apparatus in which a cable can be arranged between a first electrical component of a first frame arranged on a first side of a conveying section and a second electrical component of a second frame arranged on a second side opposite the first side, without increasing the size of the apparatus. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram illustrating an inkjet recording apparatus. [Diagram 2] FIG. 2 is a schematic diagram showing a print module. [Diagram 3] FIG. 4 is a cross-sectional view showing a state in which the transport path of the pre-imaging transport unit is opened. [Figure 4] FIG. 4 is a perspective view showing a state in which the transport path of the pre-imaging transport unit is open. [Diagram 5] FIG. 4 is a perspective view showing a relay unit disposed in the print module. [Figure 6] FIG. 4 is a perspective view showing the rear side of the print module. [Figure 7] FIG. 13 is a diagram for explaining how bundled wires are routed. [Figure 8] FIG. 4 is a perspective view showing a state in which the connector cover is removed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, an image forming apparatus of this embodiment will be described with reference to FIG. 1. Here, as an example of the image forming apparatus, a so-called sheet-fed inkjet recording apparatus 100 that forms an image on a sheet using ink and a reaction liquid will be described. The sheet may be any recording material that can receive ink, such as paper such as plain paper or cardboard, plastic film such as an overhead projector sheet, specially shaped sheets such as envelopes or index paper, and cloth.

[0010] In this specification, the side on which an operator stands when operating the inkjet recording apparatus 100 is referred to as the "front (or front)" and the opposite side is referred to as the "rear (or rear)". Furthermore, the left side as viewed from the front is referred to as the "left" and the right side as viewed from the front is referred to as the "right". Figure 1 shows the inkjet recording apparatus 100 as viewed from the front.

[0011] <Inkjet recording device> 1, the inkjet recording apparatus 100 includes a paper feed module 1000, a print module 2000, a drying module 3000, a fixing module 4000, a cooling module 5000, an inverting module 6000, and a stacking module 7000. The sheet S supplied from the paper feed module 1000 undergoes various processes while being transported along a transport path within each module, and is finally discharged to the stacking module 7000.

[0012] The paper feed module 1000, print module 2000, drying module 3000, fixing module 4000, cooling module 5000, reversing module 6000, and stacking module 7000 may each have a separate housing, and these housings may be connected to configure the inkjet recording apparatus 100. Alternatively, the paper feed module 1000, print module 2000, drying module 3000, fixing module 4000, cooling module 5000, reversing module 6000, and stacking module 7000 may be arranged in a single housing.

[0013] The paper feed module 1000 has storage chambers 1500a, 1500b, and 1500c for storing sheets S, and the storage chambers 1500a to 1500c are provided so as to be able to be pulled out to the front side in order to store the sheets S. The sheets S are fed one by one in each of the storage chambers 1500a to 1500c by a separation belt and a transport roller, and are transported to the print module 2000. The number of storage chambers 1500a to 1500c is not limited to three, and one, two, or four or more may be provided.

[0014] The print module 2000 includes a pre-imaging transport unit 2400 (see FIG. 2 described later), a print belt unit 2200, and a recording unit 2300. The sheet S transported from the paper feed module 1000 is transported to the print belt unit 2200 after the inclination and position of the sheet S are corrected by the pre-imaging transport unit 2400. The recording unit 2300 is disposed at a position facing the print belt unit 2200 with respect to the transport path. The recording unit 2300 as an image forming unit performs a recording process (printing) on ​​the transported sheet S from above with a recording head to form an image. The sheet S is attracted and transported by the print belt unit 2200, so that a clearance with the recording head is secured. In addition, a plurality of recording heads are arranged along the transport direction (first direction) of the sheet S. In this embodiment, in addition to the four colors of Y (yellow), M (magenta), C (cyan), and Bk (black), a total of five line-type recording heads corresponding to reaction liquids are provided.

[0015] The number of ink colors and recording heads are not limited to five. The inkjet method may be a method using a heating element, a method using a piezoelectric element, a method using an electrostatic element, a method using a MEMS (Micro Electro Mechanical Systems) element, or the like. Ink of each color is supplied to the recording head from an ink tank (not shown) via an ink tube. The sheet S printed by the recording section 2300 is transported by the print belt unit 2200, and an in-line scanner (not shown) arranged downstream of the recording section in the transport direction can detect the misalignment and color density of the image formed on the sheet S and correct the printed image.

[0016] The drying module 3000 includes a decoupling section 3200, a drying belt unit 3300, and a hot air blowing section 3400. The drying module 3000 reduces the liquid content of the ink applied to the sheet S in order to improve the fixation of the ink to the sheet S by the subsequent fixing module 4000. The sheet S on which an image has been formed is transported to a decoupling section 3200 arranged in the drying module 3000. In the decoupling section 3200, frictional force is generated between the sheet S and the belt by the wind pressure of the wind blown from above, and the sheet S is transported by the belt. In this way, the sheet S placed on the belt is transported by frictional force, thereby preventing the sheet S from shifting when the sheet S is transported between the print belt unit 2200 and the decoupling section 3200.

[0017] The sheet S transported from the decoupling section 3200 is suction-transported by the drying belt unit 3300, and the ink applied to the sheet S is dried by blowing hot air onto the sheet S from a hot air blowing section 3400 disposed above the belt.

[0018] The fixing module 4000 has a fixing belt unit 4100. The fixing belt unit 4100 fixes the ink onto the sheet S by passing the sheet S conveyed from the drying module 3000 between a heated upper belt unit 4110 and a lower belt unit 4120.

[0019] The cooling module 5000 has a plurality of cooling sections 5100, which cool the high-temperature sheet S transported from the fixing module 4000. The cooling section 5100, for example, takes in outside air with a fan into a cooling box to increase the pressure inside the cooling box, and cools the sheet S by blowing air from the cooling box through a nozzle due to the pressure against the sheet S. The cooling sections 5100 are disposed on both sides of the transport path of the sheet S, and cool both sides of the sheet S.

[0020] The cooling module 5000 is also provided with a transport path switching unit 5002. The transport path switching unit 5002 switches the transport path of the sheet S depending on whether the sheet S is transported to the reversing module 6000 or to a double-sided transport path for double-sided printing in which images are formed on both sides of the sheet S.

[0021] The inversion module 6000 has an inversion section 6400. The inversion section 6400 inverts the sheet S being conveyed, and changes the orientation of the sheet S when it is discharged to the stacking module 7000. The stacking module 7000 has a top tray 7200 and a stacking section 7500, and stacks the sheet S conveyed from the inversion module 6000.

[0022] During double-sided printing, the sheet S is conveyed to a conveyance path below the cooling module 5000 by the conveyance path switching unit 5002. Thereafter, the sheet S passes through a double-sided conveyance path of the fixing module 4000, the drying module 3000, the print module 2000, and the paper feed module 1000, and is returned to the print module 2000. The double-sided conveyance section of the fixing module 4000 is provided with an inversion unit 4200 that inverts the sheet S. The sheet S returned to the print module 2000 has an image formed with ink on the other side on which the image is not formed, and is discharged to the stacking module 7000 via the drying module 3000, the fixing module 4000, the cooling module 5000, and the inversion module 6000.

[0023] <Print module> Next, the print module 2000 will be described with reference to Fig. 2. As shown in Fig. 2, the print module 2000 has a head maintenance unit 2600 and a relay unit 2500 in addition to a pre-imaging transport unit 2400, a print belt unit 2200, and a recording unit 2300. The pre-imaging transport unit 2400 is disposed upstream of the print belt unit 2200 in the transport direction, and transports the sheet S to the print belt unit 2200 in response to the drive of a drive motor 2202. A head maintenance unit 2600 is disposed above the pre-imaging transport unit 2400. The head maintenance unit 2600 is provided movably relative to the recording unit 2300 in order to protect and clean the recording head of the recording unit 2300 when not printing.

[0024] The housing 2100 of the print module 2000 includes a front plate provided on the front side, a rear plate provided on the rear side and supporting each unit together with the front plate, stays connecting the front plate and rear plate, a frame supporting the front plate and rear plate, and other plate-shaped metal parts. An exterior cover that constitutes the exterior is provided on the housing 2100 in a removable or openable / closable manner. As the exterior cover, for example, a front cover is provided on the front, side covers on both the left and right sides, and a rear cover is provided on the rear.

[0025] The print belt unit 2200 and the pre-imaging transport unit 2400 are detachably provided in the housing 2100. An operator can remove the front cover to perform maintenance or part replacement, and can remove the print belt unit 2200 or the pre-imaging transport unit 2400 from the housing 2100 as necessary. In this embodiment, when removing the print belt unit 2200 or the pre-imaging transport unit 2400 from the housing 2100, the operator can release the electrical connection by first removing the cable bundle from the relay unit 2500. The cable bundle is a bundle of multiple signal lines (cables) that transmit different electrical signals.

[0026] <Relay unit> In this embodiment, electrical components such as a motor for operating the print belt unit 2200, a motor for operating the pre-imaging transport unit 2400, and a detection sensor (not shown) for detecting the sheet S are disposed on the front side of the print module 2000. On the other hand, a board 2700 such as a control board for controlling the entire print module 2000 and for controlling the rotation of the motor is disposed on the rear side of the print module 2000 (see FIG. 6). A relay unit 2500 is disposed in the print module 2000 to electrically connect these electrical components disposed on the front side and the board 2700 disposed on the rear side by a cable.

[0027] Next, the arrangement of the bundled wires in this embodiment will be described with reference to Figures 3 to 8 along with Figure 2. Figure 3 is a cross-sectional view showing a state in which the transport path of the pre-imaging transport unit 2400 is open.

[0028] As shown in Fig. 3, the pre-imaging transport unit 2400 has a transport guide 2414 and a transport unit 2410, and the transport guide 2414 and the transport unit 2410 form a transport path. The pre-imaging transport unit 2400 is disposed between a front frame 2100A as a first frame disposed on the front side (front side, first side) in the housing 2100 and a rear frame 2100B as a second frame disposed on the rear side (rear side, second side) opposite to the front side, and forms a transport path through which the sheet S passes in a direction intersecting the front-rear direction (second direction) between the transport guide 2414 and the transport unit 2410. The transport unit 2410 is provided with a transport roller 2412 that rotates to transport the sheet S, and the transport roller 2412 as a rotating body is rotated by a drive motor 2202 (see Fig. 2).

[0029] When a jam of the sheet S occurs in the transport path formed by the transport guide 2414 and the transport unit 2410 and through which the sheet S passes, the jam of the sheet S is detected by the board 2700 (see FIG. 6) based on a signal from a detection sensor (not shown). When a jam of the sheet S is detected, an operator needs to expose the transport path in order to perform jam processing to remove the sheet S remaining in the transport path.

[0030] In this embodiment, an operator can remove the sheet S from the transport path by pulling the transport unit 2410 downward. To do so, the transport unit 2410 can move between a first position for transporting the sheet S and a second position different from the first position in a direction (third direction) perpendicular to the image forming surface of the transported sheet S. In this embodiment, the transport unit 2410 is provided such that the front side can rotate up and down relative to the transport guide 2414, with a rotation shaft 2413 provided on the rear frame 2100B side, which is the rear side of the housing 2100, as the rotation center. A rotation space 2900 in which the transport unit 2410 can rotate to a position where the sheet S can be removed within the housing 2100 is secured below the pre-imaging transport unit 2400. The rotation space 2900 is a rotation area in which the transport unit 2410 rotates.

[0031] A transport unit 2410 as a transport section is provided so as to be movable relative to a transport guide 2414 between a transportable position (first position) where the sheet S can be transported by the transport rollers 2412 and a separated position (second position) where the transport guide 2414 is separated from the transport guide 2414 to open a transport path through which the sheet S passes and the transport rollers 2412 cannot transport the sheet S. The transport guide 2414 is provided to form a transport path through which the sheet S passes between the transport guide 2414 and the transport unit 2410. When the transport unit 2410 is in the separated position, an operator can remove the sheet S remaining on the transport unit 2410.

[0032] Fig. 4 is a perspective view showing a state in which the transport path of the pre-imaging transport unit 2400 is open. As shown in Fig. 4, a lever 2420 having a locking function is provided on the front side of the transport unit 2410, and an operator can release the lock by operating the lever 2420 to rotate the transport unit 2410.

[0033] FIG. 5 is a perspective view showing the relay unit 2500. As shown in FIG. 5, the relay unit 2500 has a connector stand 2510. A plurality of relay connectors 2533 are arranged on the connector stand 2510 as an arrangement stand. The relay connector 2533 is capable of inserting and removing the bundle of wires of the electric member and the bundle of wires of the board. In the present embodiment, as an example, a bundle of wires 2532 as a first bundle of wires connected to the drive motor 2202 (see FIG. 2) as the first electric member and the detection sensor (not shown) and a bundle of wires 2530 as a second bundle of wires connected to the board 2700 (see FIG. 6) as the second electric member are inserted into the relay connector 2533. As a result, the drive motor 2202 and the detection sensor of the pre-imaging transport unit 2400 are electrically connected to the board 2700 via the relay unit 2500.

[0034] The relay unit 2500 is fixed to the front side of the cable holder 2511, and the cable holder 2511 is fixed to the partition plate 2103. The cable holder 2511 can hold the cable 2530 connected to the board 2700 while guiding it from the rear side to the front side of the housing 2100. The cable holder 2511 is preferably provided with a groove into which the cable 2530 can be fitted, a cable clamp capable of holding the cable 2530, or the like, so as to guide the cable 2530 drawn into the housing 2100 from the through hole 2102 formed in the rear plate 2101 to the connector stand 2510 of the relay unit 2500.

[0035] Similarly to the cable 2530, the cable holder 2511 can hold a tube bundle 2800 that is aligned with the cable 2530 and drawn into the housing 2100 through the through hole 2102. The tube bundle 2800 is a bundle of tubes for each ink color connected to the head maintenance unit 2600. The tube bundle 2800 is provided to send unnecessary ink from the head maintenance unit 2600 to a waste ink tank (not shown) located on the rear side.

[0036] 3 and 4, a connector cover 2520 that covers the relay unit 2500 is detachably provided on the relay unit 2500. The connector cover 2520 as a cover member is provided to prevent the transport unit 2410 from contacting and damaging the relay connector 2533 of the connector stand 2510 and the bundled wire 2530 during jamming processing of the sheet S.

[0037] In this embodiment, for example, when the transport unit 2410 is rotated by "15 degrees", as shown in Fig. 3, the transport unit 2410 hits a regulating portion 2104 provided on the partition plate 2103, thereby regulating the rotation of the transport unit 2410. The regulating portion 2104 protrudes from the partition plate 2103 so that a gap is formed between the lower surface of the transport unit 2410 and the connector cover 2520 when the transport unit 2410 is rotated by "15 degrees". In this way, the transport unit 2410 is separated from the connector cover 2520, and therefore damage caused by contact between the transport unit 2410 and the connector cover 2520 can be prevented.

[0038] In the relay unit 2500, the connector stand 2510 on which the relay connector 2533 is arranged is inclined so that the end on the front frame 2100A side is lower than the end on the rear frame 2100B side, as shown in Fig. 3. In this way, a sufficient working space can be secured between the connector stand 2510 and the lower surface of the transport unit 2410 for an operator to insert and remove the cable 2532 and the cable 2530 into and from the relay connector 2533. Furthermore, the visibility of the relay connector 2533 when the operator looks at the relay unit 2500 can be improved, so that the operator's workability when inserting and removing the cable 2530, 2532 into and from the relay connector 2533 can be improved.

[0039] In this embodiment, as shown in Fig. 3, the cable 2530 is disposed in the front-rear direction from the rear side to the front side of the housing 2100 in a space 2910 (second space) separated from a rotation space 2900 (first space) that is a movement range of the transport unit 2410 secured below the pre-imaging transport unit 2400 on the opposite side of the transport guide 2414 with respect to the transport unit 2410 when in the separated position. The relay unit 2500 is disposed in the space 2910. The rotation space 2900 and the space 2910 are in communication with each other. In contrast, a partition plate 2103 disposed below the transport unit 2410 separates the space including the rotation space 2900 and the space 2910 from the other spaces of the housing 2100.

[0040] 5, a cable 2530 connected to a relay connector 2533 of a connector stand 2510 is held by a cable holder 2511 and routed through a through hole 2102 in a rear plate 2101 to a board 2700 on the rear side. As shown in Fig. 6, a board 2700 is attached to the rear frame 2100B side (second frame side) of the print module 2000, and the cable 2530 connected to the board 2700 passes through the through hole 2102 in the rear plate 2101 and then branches out to be connected to each board 2700.

[0041] As shown in Fig. 5, the cable 2532 connected to the relay connector 2533 of the connector base 2510 is routed in the left-right direction (the conveying direction of the sheet S) on the front side. This is because the cable 2532 connected to the drive motor 2202 (see Fig. 2) and the detection sensor (not shown) of the pre-imaging conveying unit 2400 is taken out to the front frame 2100A side (first frame side) of the print module 2000 through through holes 2401 formed at two locations on the left and right of the front side plate 2140 as shown in Fig. 7 and Fig. 8. Also, the connector cover 2520 is attached in a state in which the cable 2532 is connected to the relay connector 2533.

[0042] As shown in Fig. 8, it is preferable that the cable 2532 is held by a plurality of cable clamps 2550. The cable clamps 2550 form a path for routing the cable 2532. As shown in Fig. 8, the cable 2531 connected to the motor 2203 of the print belt unit 2200 is taken out to the front side of the print module 2000 through a through hole 2201 formed in the front plate, and connected to a relay connector 2533. The cable 2532 may be held and routed by the cable clamps 2551.

[0043] As described above, in this embodiment, the cable 2530 is disposed in the space 2910 below the transport unit 2410. Also, the relay unit 2500 for relaying the cable 2530 to the cable 2532 may be disposed in the space 2910. With respect to the vertical direction in which the transport unit 2410 rotates, the size of the space 2910 changes according to the rotation space 2900 of the transport unit 2410 secured in the housing 2100 (inside the housing). The size of the rotation space 2900 of the transport unit 2410 can be adjusted within a range in which the sheet S can be removed from the transport path when the print module 2000 is assembled. Therefore, a part of the rotation space 2900 prepared in advance in the housing 2100 for rotating the transport unit 2410 can be used as the space 2910 in which the cable 2530 and the relay unit 2500 are disposed. That is, the space in the housing 2100 can be effectively utilized. Therefore, it is possible to provide a cable that electrically connects the electrical components arranged on the front side and the board arranged on the rear side without increasing the size of the device.

[0044] <Other embodiments> In the above-described embodiment, the inkjet recording apparatus 100 that ejects ink to form an image on a sheet S has been described as an example of an image forming apparatus, but the present invention is not limited to this. The present invention is also applicable to an electrophotographic image forming apparatus that forms a toner image on a sheet S using toner. In the case of an electrophotographic image forming apparatus, the image forming apparatus may be a lateral (approximately horizontal) conveyance type image forming apparatus that forms a toner image on a sheet S conveyed on a horizontal conveyance path, or a vertical (approximately vertical) conveyance type image forming apparatus that forms a toner image on a sheet S conveyed on a vertical conveyance path. [Explanation of symbols]

[0045] 100... image forming apparatus (inkjet recording apparatus), 2100... housing, 2100A... first frame (front frame), 2100B... second frame (rear frame), 2103... partition plate, 2104... regulating portion, 2202... first electric member (driving motor), 2300... image forming portion (recording portion), 2410... conveying portion (conveying unit), 2412... rotating body (conveying roller), 2413... rotating shaft, 24 14...First member (guide member), 2500...Relay unit, 2510...Arrangement base (connector base), 2511...Holding portion (cable holding portion), 2520...Cover member (connector cover), 2532...First cable (cable), 2530...Second cable (cable), 2533...Relay connector, 2700...Second electrical member (control board), 2900...First space (rotation space), 2910...Second space (space), S...Sheet

Claims

1. an image forming unit that forms an image on a sheet; a conveying section that conveys a sheet in a conveying direction along a first direction; a housing including a first frame disposed on a first side of the transport section in a second direction intersecting the first direction, and a second frame disposed on a second side of the transport section opposite to the first side in the second direction; a first electrical member disposed on the first frame of the housing; a second electrical member disposed on the second frame of the housing; a cable that electrically connects the first electrical member and the second electrical member; the conveying section is movable between a first position for conveying a sheet and a second position different from the first position in a third direction perpendicular to an image forming surface of the sheet to be conveyed, the cable is disposed in a second space that communicates with a first space within a movement range of the conveying unit and is on the opposite side to the first position with respect to the conveying unit when the conveying unit is in the second position; 1. An image forming apparatus comprising:

2. The transport unit is provided to be rotatable about a rotation axis provided on the second frame side.

2. The image forming apparatus according to claim 1,

3. a partition plate disposed below the transport unit and partitioning the first space and the second space from other spaces within the housing; The bundled wire is disposed between the partition plate and the second position.

3. The image forming apparatus according to claim 2,

4. A holding portion is provided for holding the bundle of wires while guiding the bundle of wires.

2. The image forming apparatus according to claim 1,

5. a relay unit provided on the first frame side to relay an electrical connection between a first bundle of wires connected to the first electric member and a second bundle of wires connected to the second electric member; 3. The image forming apparatus according to claim 2,

6. The relay unit includes: a plurality of relay connectors to which the first bundled wires or the second bundled wires are connected; a placement stand on which the plurality of relay connectors are placed, The placement stand is inclined so that an end of the placement stand on the side of the first frame is lower than an end of the placement stand on the side of the second frame.

6. The image forming apparatus according to claim 5,

7. A cover member is provided detachably on the relay unit and covers the relay unit.

6. The image forming apparatus according to claim 5,

8. a restricting portion that restricts rotation of the conveying portion so that the conveying portion in the second position is spaced apart from the cover member; 8. The image forming apparatus according to claim 7,

9. the conveying unit has a rotating body for conveying a sheet, The first electric member has a motor that drives the rotating body, The second electrical member has a control board that controls the rotation of the motor.

2. The image forming apparatus according to claim 1,

Images