JP2011095588A - Image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the need for a hinge mechanism that rotates a circuit board remaining attached to an apparatus body. <P>SOLUTION: The pawl 142 of a housing 106 detached from a shielding position is caught by the insertion hole 140A of a support portion 140, thereby supporting the housing 106 in the exposed position of the apparatus body 22 via another housing 115. This eliminates the need for a hinge mechanism that enables rotation and movement of the housing 106 while the housing 106 of a second control board 102 remains attached to the apparatus body 22. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an image forming apparatus.

  As an image forming apparatus, an image forming apparatus disclosed in Patent Document 1 is known. The image forming apparatus disclosed in Patent Document 1 is configured such that the electric wire 54 wired from the electrical component unit 50 to the apparatus main body 12 presses the electrical component unit 50 in the opening direction, and maintains the open state of the electrical component unit 50. ing.

JP 2007-114273 A (FIG. 2)

  It is an object of the present invention to expose a drive system without relying on a hinge mechanism that rotates and moves a circuit board with respect to the apparatus main body.

  According to a first aspect of the present invention, there is provided a drive system for driving a component member for forming an image on a recording medium, a circuit board for operating the drive system, and the circuit board. A first support portion that is detachably supported along an inner surface of the opening / closing portion in a closed state inside an opening / closing portion that can be opened / closed with respect to the device body; And a second support part that supports the circuit board removed from the concealment position at an exposed position that exposes the drive system to the outside.

  According to a second aspect of the present invention, the concealment position is a transport path side on which the drive system for driving a transport member that transports the recording medium is disposed, and the exposure position is transported with respect to the concealment position. The image forming apparatus according to claim 1, wherein the image forming apparatus is on the side opposite to the road side.

  According to a third aspect of the present invention, the circuit board is a control board that sends a signal for driving the drive system to the apparatus main body, and is on the opposite side of the conveyance path from the control board at the concealment position. The image forming apparatus according to claim 2, further comprising: a power supply board that sends power for driving the drive system to the apparatus main body, and the control board at the exposed position covers at least a part of the power supply board. It is.

  According to a fourth aspect of the present invention, the wiring connected to the circuit board and the apparatus main body can be connected to the circuit board through different paths at the concealment position and the exposed position. The image forming apparatus according to claim 1.

  The invention according to claim 5 is the length according to any one of claims 1 to 3, wherein the wiring connected to the circuit board and the apparatus main body has a length that does not reach the circuit board at the exposed position. An image forming apparatus.

  According to a sixth aspect of the present invention, wiring connected to the circuit board and the apparatus main body is connected from above and below the circuit board, and the exposed position is a position lateral to the concealment position. The image forming apparatus according to claim 1.

  According to the configuration of the first aspect of the present invention, the drive system can be exposed without relying on a hinge mechanism for rotating the circuit board relative to the apparatus main body.

  According to the structure of Claim 2 of this invention, the drive state of the drive system of a conveyance member can be visually recognized.

  According to the structure of Claim 3 of this invention, it can switch to the state which can visually recognize a power supply board | substrate, and the state which can visually recognize a drive system.

  According to the configuration of the fourth aspect of the present invention, it is easier to place the wiring in a path where the wiring is less obstructive than in the case where the wiring path is the same at the concealment position and the exposed position.

  According to the configuration of the fifth aspect of the present invention, it is difficult for noise to enter the wiring as compared with the case where the wiring having a length reaching the circuit board at the exposed position is used.

  According to the configuration of the sixth aspect of the present invention, it is possible to suppress the wiring from being slackened or pulled compared to the case where the exposure position is a position on the vertical side with respect to the concealment position.

FIG. 1 is a schematic diagram illustrating a configuration of an image forming apparatus according to the present embodiment. FIG. 2 is a perspective view of the appearance of the image forming apparatus according to the present embodiment as viewed from the rear side. FIG. 3 is a perspective view of the image forming apparatus shown in FIG. 2 with the cover removed. FIG. 4 is a schematic diagram illustrating a configuration around the housing of the second control board according to the present embodiment. FIG. 5 is a perspective view showing the configuration of the housing of the second control board according to the present embodiment. FIG. 6 is a perspective view of the housing of the second control board according to the present embodiment as viewed from the counter plate side. FIG. 7 is a perspective view showing a configuration of a support portion formed on the upper plate of the housing of the second power supply substrate according to the present embodiment. FIG. 8 is a perspective view showing a state in which the housing of the second control board according to the present embodiment is located at the exposed position. FIG. 9 is a schematic diagram showing the drive system in a state where the housing of the second control board according to the present embodiment is located at the exposed position.

Below, an example of an embodiment concerning the present invention is described based on a drawing.
(Configuration of image forming apparatus according to the present embodiment)
First, the configuration of the image forming apparatus according to the present embodiment will be described. FIG. 1 is a schematic diagram illustrating a configuration of an image forming apparatus according to the present embodiment.

  As shown in FIG. 1, the image forming apparatus 10 according to the present embodiment includes an image reading device 11 that reads an image of a document G, and an image recording device 21 that records an image on a recording medium P such as paper. Yes. The image reading device 11 is arranged on the upper part of the image forming device 10, and the image recording device 21 is arranged on the lower side of the image reading device 11. Note that an arrow UP shown in the drawing indicates a vertically upward direction.

  The image reading device 11 is configured to read an image of the original G and convert the read image into an image signal. The image recording device 21 is configured to record an image on the recording medium P based on the image signal converted by the image reading device 11 or an external image signal. Hereinafter, specific configurations of the image reading device 11 and the image recording device 21 will be described.

(Configuration of the image reading apparatus 11 according to the present embodiment)
First, the configuration of the image reading apparatus 11 will be described.

  As shown in FIG. 1, the image reading device 11 includes a document transport device 12 that transports the document G from the document storage unit 13 to the document discharge unit 15, an image of the document G transported by the document transport device 12, and a platen glass 43. And an image reading unit 14 capable of reading an image of the document G placed on the document. The document conveying device 12 is arranged at the upper part of the image reading device 11, and the image reading unit 14 is arranged at the lower part of the image reading device 11.

  The document conveying device 12 is attached to the image reading unit 14 so as to be openable and closable, and the document G is placed on the first platen glass 43 when the document conveying device 12 is opened.

  The image reading unit 14 irradiates the reading surface (image surface) of the document G with the light L, and the light L is irradiated from the light irradiation unit 17 to the reading surface of the document G. A light guide unit 19 that guides the reflected light L reflected by the reading surface, an imaging lens 24 that forms an optical image of the light L guided by the light guide unit 19, and an optical image that is formed by the imaging lens 24 And a detection unit 26 for detecting.

  The detection unit 26 includes a photoelectric conversion element such as a CCD (Charge Coupled Device) image sensor that photoelectrically converts the light L imaged by the imaging lens 24. The electrical signal obtained by the detection unit 26 is sent to an image processing device 28 that is electrically connected to the detection unit 26. In the image processing device 28, the electric signal is subjected to image processing, and the electric signal (image signal) subjected to the image processing is exposed to a later-described exposure device 40 of the image recording device 21 via a later-described second control board 102 (see FIG. 3). To be sent to.

(Configuration of the image recording apparatus 21 according to the present embodiment)
Next, the configuration of the image recording apparatus 21 according to the present embodiment will be described.

  As shown in FIG. 1, the image recording apparatus 21 includes a plurality of recording medium accommodating portions 80 that accommodate recording media P such as paper, an image forming portion 27 that forms an image on the recording medium P, and a plurality of recording media. A transport unit 29 that transports the recording medium P from the storage unit 80 to the image forming unit 27, a first discharge unit 69, a second discharge unit 72, and a second discharge unit that discharge the recording medium P on which an image is formed by the image forming unit 27. The main body 22 provided with the respective components including the third discharge section 76, the recording medium storage section 80, the image forming section 27, the transport section 29, the first discharge section 69, the second discharge section 72, and the third discharge section 76. It is equipped with.

  The image forming unit 27 includes image forming units 30Y, 30M, 30C, and 30K (hereinafter referred to as 30Y to 30K) that form toner images of yellow (Y), magenta (M), cyan (C), and black (K). And an intermediate transfer belt 32 as an example of an intermediate transfer body onto which the toner images formed by the image forming units 30Y to 30K are transferred, and the toner images formed by the image forming units 30Y to 30K to the intermediate transfer belt 32. A first transfer roller 46 as an example of a first transfer member for transferring the toner image to the recording medium P, and a toner image transferred to the intermediate transfer belt 32 by the first transfer roller 46 from the intermediate transfer belt 32 to the recording medium P. A second transfer roll 60 as an example of a second transfer member, and the image was transferred from the intermediate transfer belt 32 to the recording medium P by the second transfer roll 60. A fixing device 64 for fixing the toner image on the recording medium P, and a.

  The image forming units 30 </ b> Y to 30 </ b> K as a whole are arranged side by side at the center in the vertical direction of the image recording apparatus 21 in a state inclined with respect to the horizontal direction. Further, the image forming units 30Y to 30K each have a photosensitive drum 34 that rotates in one direction (counterclockwise direction in FIG. 1) as an image holding body that holds a toner image.

  Around each photosensitive drum 34, in order from the upstream side in the rotation direction of the photosensitive drum 34, a charging device 36 for charging the photosensitive drum 34, and the photosensitive drum 34 charged by the charging device 36 are exposed to expose the photosensitive drum 34. An exposure device 40 that forms an electrostatic latent image on the drum 34, a developing device 42 that develops the electrostatic latent image formed on the photosensitive drum 34 by the exposure device 40 to form a toner image, and a photosensitive drum 34. A removal device 44 for removing toner remaining on the photosensitive drum 34 after the formed toner image is transferred to the intermediate transfer belt 32 by the first transfer roll 46 is provided.

  The exposure device 40 is common to the image forming units 30Y to 30K, and forms an electrostatic latent image based on an image signal sent from the second control board 102 (see FIG. 3). Examples of the image signal sent from the second control board 102 include an image signal generated by the image reading device 11 and an image signal acquired by the second control board 102 from an external device.

  As shown in FIG. 1, the intermediate transfer belt 32 is disposed on the upper side of the image forming units 30 </ b> Y to 30 </ b> K, and opposes the drive roll 48 that applies drive force to the intermediate transfer belt 32 and the second transfer roll 60. A counter roll 50, a tension applying roll 54 for applying tension to the intermediate transfer belt 32, a first driven roll 56, and a second driven roll 58 are wound around at a predetermined tension.

  The intermediate transfer belt 32 is rotated by a driving roll 48 and circulates in one direction (clockwise direction in FIG. 1) while being in contact with the photosensitive drum 34.

  A removing device 52 for removing the toner remaining on the intermediate transfer belt 32 is provided at a position facing the drive roll 48 with the intermediate transfer belt 32 interposed therebetween.

  Above the intermediate transfer belt 32, a toner cartridge 38Y that stores toner of each color supplied to the developing device 42 of each color of yellow (Y), magenta (M), cyan (C), and black (K), 38M, 38C, and 38K are provided.

  Each first transfer roll 46 faces the photosensitive drum 34 with the corresponding intermediate transfer belt 32 interposed therebetween. A space between each first transfer roll 46 and the photosensitive drum 34 is a first transfer position at which the toner image formed on the photosensitive drum 34 is transferred to the intermediate transfer belt 32.

  The second transfer roll 60 faces the counter roll 50 with the intermediate transfer belt 32 interposed therebetween. A space between the second transfer roll 60 and the opposing roll 50 is a second transfer position where the toner image transferred to the intermediate transfer belt 32 is transferred to the recording medium P.

  The transport unit 29 includes a feed roll 88 that feeds the recording medium P stored in each of the recording medium storage units 80, a transport path 62 that transports the recording medium P sent to the transport roll 88, and the transport path 62. And transport rollers 90, 92, 94 for transporting the recording medium P, which is arranged and delivered by the delivery roller 88, to the second transfer position.

  The fixing device 64 is disposed downstream in the transport direction from the second transfer position, and fixes the toner image transferred at the second transfer position to the recording medium P by the heating roll 64A and the pressure roll 64B.

  A transport roll 66 for transporting the recording medium P on which the toner image is fixed is provided downstream of the fixing device 64 in the transport direction. A switching member 68 for switching the conveyance direction of the recording medium P is provided on the downstream side of the conveyance roll 66 in the conveyance direction. On the downstream side of the switching member 68 in the transport direction, a first discharge roll that discharges the recording medium P transported to one side (right side in FIG. 1) of the transport direction switched by the switching member 68 to the first discharge unit 69. 70 is provided.

  Further, on the downstream side in the transport direction of the switching member 68, a transport roll 73 that transports the recording medium P transported to the other side (upper side in FIG. 1) of the transport direction switched by the switching member 68, and a transport roll 73. A second discharge roller 74 that discharges the recording medium P to be transported to the second discharge unit 72 and a third discharge roller 78 that discharges the recording medium P transported by the transport roller 73 to the third discharge unit 76 are provided. It has been.

  On the side of the fixing device 64, a reverse conveyance path 96 is formed through which the recording medium P reversed by reversing the conveyance roll 73 is conveyed. A plurality of transport rolls 98 are provided along the reverse transport path 96 in the reverse transport path 96. The recording medium P transported by these transport rolls 98 is sent again to the second transfer position by the transport roll 94.

  Further, the apparatus main body 22 of the image recording apparatus 21 includes four photosensitive drums 34 of the image forming units 30Y to 30K and an intermediate transfer belt as a drive system for driving a component for forming an image on a recording medium. A driving system 81 that drives the 32 driving rolls 48, a driving system 82 that drives the delivery roll 88, the conveying rolls 90, 92, 94, etc. of the transport unit 29, and a heating roll 64 A and a pressure roll 64 B And a drive system (not shown) for driving other operating components (for example, the developing device 42). Each drive system 81, 82, 83 includes each drive motor 81A, 82A, 83A, and each gear train 81B as an example of a transmission member for transmitting drive force from each drive motor 81A, 82A, 83A to the driven side. , 82B, 83B (see FIG. 9). In FIG. 9, the gears of the gear trains 81B, 82B, 83B are partially omitted.

  Next, an image forming operation for forming an image on the recording medium P in the image recording apparatus 21 according to the present embodiment will be described.

  In the image recording apparatus 21 according to the present embodiment, the recording medium P sent out from any of the plurality of recording medium storage units 80 is sent to the second transfer position by the transport rollers 90, 92, and 94.

  On the other hand, in the image forming units 30Y to 30K, the exposure device 40 forms an electrostatic latent image on the photosensitive drum 34 based on an image signal acquired from the image reading device 11 or an external device, and a toner image based on the electrostatic latent image. Is formed. The toner images of the respective colors formed by the image forming units 30Y to 30K are superimposed on the intermediate transfer belt 32 at the first transfer position to form a color image. Then, the color image formed on the intermediate transfer belt 32 is transferred onto the recording medium P at the second transfer position.

  The recording medium P to which the toner image has been transferred is conveyed to the fixing device 64, and the transferred toner image is fixed by the fixing device 64. When an image is formed only on one side of the recording medium P, after the toner image is fixed, the recording medium P is discharged to one of the first discharge unit 69, the second discharge unit 72, and the third discharge unit 76. The

  In the case of forming images on both sides of the recording medium P, after the image is formed on one side, the recording medium P is reversed by the conveyance roll 73 and sent to the reverse conveyance path 96. Further, the sheet is fed again from the reverse conveyance path 96 to the second transfer position by the conveyance roll 94, an image is formed on the opposite surface side in the same manner as described above, and an image is formed on both surfaces of the recording medium P. As described above, a series of image forming operations are performed.

  The configuration of the image recording device 21 is not limited to the above configuration, and may be, for example, a direct transfer type image recording device that does not have an intermediate transfer member, or an image recording device that can record an image. That's fine.

(Configuration of the rear side of the image forming apparatus 10)
Next, the configuration of the rear side of the image forming apparatus 10 will be described. FIG. 2 is a perspective view of the appearance of the image forming apparatus 10 as viewed from the rear side.

  Note that the rear surface 10B of the image forming apparatus 10 is a surface opposite to the front surface 10A. In the present embodiment, the document conveying device 12 of the image reading device 11 is opened to the image reading unit 14. This is the side where the hinge 12A is disposed. Further, the front surface 10A of the image forming apparatus 10 is a side on which various operations of the image forming apparatus 10 are performed from that side. For example, an operation unit 12B for operating the image forming apparatus 10 is disposed. On the side.

  In the following, for convenience of explanation, as indicated by arrows in the figure, the front surface 10A side is the front of the image forming apparatus 10 and its component parts, and the rear surface 10B side is the rear of the image forming apparatus 10 and its component parts. The right side toward the rear surface 10B will be described as the right side of the image forming apparatus 10 and its component parts, and the left side toward the rear surface 10B will be described as the left side of the image forming apparatus 10 and its component parts.

  As shown in FIG. 2, a plurality of covers 104 are attached to the rear surface 10 </ b> B of the image forming apparatus 10 to cover the rear surface (outer peripheral surface) 22 </ b> A (see FIG. 3) of the apparatus main body 22 of the image recording apparatus 21. The plurality of covers 104 are configured to be detachable from the apparatus main body 22 as shown in FIG. That is, the cover 104 functions as an opening / closing part that can be opened and closed with respect to the apparatus main body 22.

  A cover 103 that covers the left side surface of the main body 22 of the image recording device 21 is attached to the left side surface 10 </ b> C of the image forming apparatus 10. The cover 103 is also detachable from the apparatus main body 22.

  An attachment member (not shown) to which the first power supply substrate 111 (see FIG. 1) is attached is detachably provided on the left side surface of the apparatus main body 22. The first power supply board 111 and its mounting member are exposed to the outside by removing the cover 103, thereby being visible from the outside and accessible from the outside.

  The first power supply substrate 111 is, for example, a circuit board having a power supply circuit for converting electric power from an external power supply into a voltage required for each part of the apparatus main body 22. In other words, the first power supply substrate 111 functions as a power supply substrate that sends power for driving the drive systems 81, 82, and 83 to the apparatus main body 22.

  As shown in FIG. 3, a frame 105 as an example of an attachment member to which the first control board 101 is attached and an attachment member to which the second control board 102 as an example of a circuit board is attached to the rear surface 22A of the apparatus main body 22. A case 106 as an example and a case 115 as an example of an attachment member to which the second power supply substrate 112 is attached are detachably provided. The rear surface 22A of the apparatus main body 22 is a surface along the inner surface of the cover 104 in the closed state, and is a facing surface that faces the inner surface of the cover 104 in the closed state.

  The first control board 101, the second control board 102, the second power supply board 112, the frame 105, the housing 106 and the housing 115 are exposed to the outside by removing the cover 104, thereby being visible from the outside. And it is configured to be accessible from the outside.

  The casing 115 (second power supply substrate 112) is arranged at the center in the vertical direction of the apparatus main body 22 of the image recording apparatus 21 and on the left side of the apparatus main body 22. This position is a position on the opposite side to the conveyance path 62 when viewed from the housing 106 in a concealment position described later.

  The housing 115 includes an opposing plate 115A, an upper plate 115B, a bottom plate 115C, and a side plate 115D disposed on the right side of the housing 115 in a state of being attached to the device main body 22. It is comprised and it is set as the rectangular parallelepiped shape by which 2 surfaces of back side and the left side were open | released. The opening 117 formed on the rear side of the housing 115 is provided with a cover plate 115F that covers the center of the opening 117 in the vertical direction. The cover plate 115F has a left end attached to the frame 22B disposed on the left side of the apparatus main body 22, and a right end attached to the side plate 115D.

  The second power supply substrate 112 is attached to the counter plate 115 </ b> A inside the housing 115. The second power supply board 112 is a circuit board having a power supply circuit for converting electric power from an external power supply from AC to DC, for example. That is, the second power supply substrate 112 functions as a power supply substrate that sends power for driving the drive systems 81, 82, and 83 to the apparatus main body 22. The second power supply board 112 is connected to the second control board 102 by wiring 114 and is connected to other components by wiring 116.

  The frame 105 (first control board 101) is disposed below the apparatus main body 22 of the image recording apparatus 21 and on the right side of the apparatus main body 22. The frame 105 includes an opposing plate 105A that faces the device main body 22 and a bottom plate 105B when mounted on the device main body 22. The first control board 101 is attached to the rear surface side of the counter plate 105A.

  The first control board 101 is, for example, a circuit board for controlling the overall operation of the image forming apparatus 10. The first control board 101 controls the image forming operation in the image forming apparatus 10 and the image in the image reading apparatus 11. The reading operation is controlled. That is, the first control board 101 functions as a control board that sends a signal for driving the drive systems 81, 82, and 83 to the apparatus main body 22. The first control board 101 is connected to the second control board 102 by wiring 122 and is connected to other components by wiring 124.

  The housing 106 (second control board 102) is arranged at the center in the vertical direction of the apparatus main body 22 of the image recording apparatus 21 and on the right side of the apparatus main body 22. This position is a concealment position where the casing 106 conceals the drive systems 81, 82, and 83 (see FIG. 9). When the casing 106 is disposed at this position, the drive systems 81, 82 are externally provided. , 83 cannot be visually recognized. In addition, the right side of the apparatus main body 22 that is the concealment position is the conveyance path 62 side on which the conveyance rolls 90, 92, and 94 and a drive system 82 that drives the conveyance rolls are arranged (see FIG. 1).

  As shown in FIGS. 4 and 5, the housing 106 has a counter plate 106 </ b> A, an upper plate 106 </ b> B, a bottom plate 106 </ b> C, and a pair of side plates 106 </ b> D and 106 </ b> E that face the device main body 22 in the mounted state. And has a rectangular parallelepiped shape with an open rear side. The second control board 102 is attached to the counter plate 106 </ b> A inside the housing 106. As shown in FIG. 6, through-holes 108 through which screws 107 (an example of first support portions) as fixing members are inserted are formed at the four corners of the counter plate 106 </ b> A. The housing 106 is attached to the concealment position by inserting the screw 107 through the through hole 108 and screwing it onto the rear surface 22A of the apparatus main body 22.

  As shown in FIG. 4, the upper plate 106 </ b> B is formed with a through hole 123 through which the wiring 120 and the wiring 121 connected to the second control board 102 from above are passed. The side plate 106D is formed with a through hole 132 through which the aforementioned wiring 114 connected to the second control board 102 from the side is passed. The bottom plate 106C has a through hole 135 through which the above-described wiring 122 connected to the second control board 102 is passed from below and a through hole 137 through which the wiring 133 connected to the second control board 102 from below is passed. , Is formed.

  The second control board 102 is connected to the second power supply board 112 by the wiring 114 passed through the through hole 132, is connected to the first control board 101 by the wiring 122 passed through the through hole 135, and passes through the through hole 123. The wiring 120 is connected to the image reading apparatus 11, the wiring 133 through the through hole 137 is connected to the exposure apparatus 40, and the wiring 121 through the through hole 123 is connected to other components.

  Each of these wirings 114, 122, 120, 121, and 133 is provided with a connector 125 as a connection terminal at both ends. The connector 125 can be attached to and detached from the second control board 102 and its connection components. Connected.

  Thus, these wirings 114, 122, 120, 121, and 133 are passed through through holes 123, 132, 135, and 137 formed in any of the upper plate 106B, the side plate 106D, and the bottom plate 106C. Since it is not wired via the board 106A, it is exposed to the outside and wired so as to be visible from the outside.

  The second control board 102 manages, for example, image data input from an image processing device 28 (see FIG. 1) of the image reading device 11 or an external device, image formation timing, and the like, and an exposure device 40 (see FIG. 1). The second control board 102 is instructed to operate. That is, the second control board 102 functions as a control board that sends a signal for driving the drive systems 81, 82, and 83 to the apparatus main body 22.

  Here, on the upper plate 115B of the casing 115, as shown in FIG. 7, a support portion that supports the casing 106 removed from the concealment position at an exposed position that exposes the drive systems 81, 82, and 83 to the outside. (An example of a second support portion) 140 is provided. The exposure position is a central portion in the vertical direction of the apparatus main body 22 of the image recording apparatus 21, a position on the left side of the apparatus main body 22, and a position on the opposite side to the right side of the apparatus main body 22 where the conveyance path 62 is formed. . That is, the exposure position is a position on the side (left side) with respect to the concealment position.

  On the other hand, as shown in FIG. 6, two claw portions 142 as an example of a supported portion supported by the support portion 140 are formed on the upper portion of the facing plate 106 </ b> A of the housing 106 so as to be separated in the left-right direction. Yes. As shown in FIG. 7, the support portion 140 is formed with two insertion holes 140 </ b> A for inserting the claw portion 142 and hooking the claw portion 142.

  In the concealment position, the housing 106 is screwed at the four corners of the opposing plate 106A, whereas the support portion 140 supports the housing 106 at two points as described above and the claw portion 142 is hooked. As a result, the lower portion of the housing 106 moves slightly rearward so as to move away from the device main body 22. The constraining force of the housing 106 on the device main body 22 is at the concealment position and the exposed position. Is different. Thereby, the attachment and detachment of the housing | casing 106 to an exposure position becomes easy.

  As shown in FIG. 8, the support unit 140 supports the housing 106 so that the opposing plate 106A is along the rear surface 22A of the apparatus main body 22, and the housing 106 is in the exposed position with the opening 116F facing rearward. It has come to be supported. Accordingly, the housing 106 is supported by the support unit 140 in the same direction at the concealment position and the exposure position. In a state where the housing 106 is supported at the exposed position by the support unit 140, the housing 106 overlaps the housing 115 on the rear side of the housing 115. Accordingly, the second control board 102 covers at least a part of the second power supply board 112.

  In addition, in a state where the housing 106 is supported at the exposed position by the support unit 140, the drive system 81 is specifically exposed from the gap of the frame 81C that supports the drive system 81, and the operation of the drive system 81 is reduced. It is configured to be visible from the gap. The drive systems 82 and 83 are exposed from a gap between frames (not shown) that support the drive systems 82 and 83, and the operation of the drive systems 82 and 83 is configured to be visible from the gap (see FIG. 9). ).

  Each of the wirings 114, 120, 121 connected to the second control board 102 is connected to the second control board 102 supported at the exposed position through a different path from that at the hidden position. ing.

  In particular, as shown in FIG. 8, the wiring 120 connected to the image reading apparatus 11 is connected not through the through hole 123 but through the opening 106F on the rear side. In addition, the wiring 122 connected to the first control board 101 and the wiring 133 connected to the exposure apparatus 40 have a length that does not reach the second control board 102 in the exposed position. For this reason, the wiring 148 longer than the wiring 122 and the wiring 149 longer than the wiring 133 are used exclusively for driving confirmation of the drive systems 81, 82, and 83. The wirings 148 and 149 are connected to the second control board 102 through different paths from the wirings 122 and 133, respectively.

(Operation of the image forming apparatus according to the present embodiment)
Next, as an operation of the image forming apparatus 10 according to the present embodiment, a procedure for confirming the operation of the drive systems 81, 82, and 83 will be described. This is for confirming the operation of the drive systems 81, 82, 83 by directly checking whether the drive systems 81, 82, 83 are operating during maintenance / inspection of the image forming apparatus 10.

  First, as shown in FIG. 3, the cover 104 is removed from the apparatus main body 22 (opening step). As a result, the housing 106 of the second control board 102 is exposed to the outside, and the housing 106 and the second control board 102 can be accessed.

  Next, the connectors 125 of the wirings 114, 120, 121, 122, and 133 connected to the second control board 102 are removed from the second control board 102. For the wiring 122, the connector 125 is also removed from the first control board 101, and for the wiring 133, the connector 125 is removed from the exposure apparatus 40 (wiring removal step).

  Next, the screw 107 is removed, and the housing 106 is removed from the apparatus main body 22. Next, the housing 106 is attached to the exposed position of the apparatus main body 22 via the housing 115 by hooking the claw portion 142 of the housing 106 into the insertion hole 140A of the support portion 140 (circuit board moving step).

  As described above, in this embodiment, the hinge mechanism that rotates the housing 106 relative to the apparatus main body 22 in order to support the housing 106 by hooking the claw 142 of the housing 106 into the insertion hole 140A of the support 140. The drive systems 81, 82, and 83 are exposed without using. Thus, in this embodiment, since the hinge mechanism whose structure is complicated is not used, the configuration is simplified.

  Next, as shown in FIG. 8, the removed connector 125 is connected to the second control board 102 again. The wiring 122 and the wiring 133 are replaced with wirings 148 and 149 that are longer than these, and the connectors 125 at both ends of the wiring are respectively connected to the second control board 102, the first control board 101, and the exposure. It connects with the apparatus 40 (wiring connection process).

  Note that the wirings 148 and 149 are longer than the wirings 122 and 133, respectively, and thus noise easily enters. However, in the operation check here, whether or not the drive systems 81, 82, and 83 are operating. Therefore, there is no problem even if the operation varies.

  Next, the image forming apparatus 10 is operated by operating the operation unit 12B, and the drive systems 81, 82, and 83 are visually confirmed to check whether the drive systems 81, 82, and 83 are operating (operation check). Process).

  In the above configuration, the second control board 102 is provided as a circuit board that is moved from the concealment position to the exposure position and is required to operate the drive systems 81, 82, and 83. For example, the first control board 101, the first power supply board 111, the second power supply board 112, and other circuit boards in this embodiment may be used.

  In the above configuration, the support unit 140 is provided in the apparatus main body 22 via the upper plate 115 </ b> B of the casing 115, but may be configured to be provided directly in the apparatus main body 22.

  Further, the support part 140 and the claw part 142 as the supported part are not limited to the above configuration, and for example, the claw part 142 is provided in the housing 115 as the support part, and the support part 140 is provided in the housing 106 as the supported part. It is sufficient that the casing 106 can be supported. Further, the support unit 140 may also be used as a support unit that supports the housing 106 in the concealment position. Therefore, the structure which is screwed by the screw 107 may be used even in the exposed position.

  The present invention is not limited to the above-described embodiment, and various modifications, changes, and improvements can be made.

DESCRIPTION OF SYMBOLS 10 Image forming apparatus 22 Apparatus main body 62 Conveyance path 81 Drive system 82 Drive system 83 Drive system 102 2nd control board (an example of a circuit board)
104 Cover (example of opening / closing part)
107 screw (an example of a first support)
112 Second power supply board (an example of a power supply board)
114 Wiring 120 Wiring 121 Wiring 122 Wiring 133 Wiring 140 Supporting part (an example of a second supporting part)

Claims (6)

A drive system provided in the apparatus main body for driving a component for forming an image on a recording medium;
A circuit board for operating the drive system;
A first support portion that removably supports the circuit board along an inner surface of the opening / closing portion in a closed state inside an opening / closing portion that can be opened / closed with respect to the apparatus main body, and at a concealing position that conceals the drive system. When,
A second support part that is provided in the apparatus main body and supports the circuit board removed from the concealment position at an exposed position that exposes the drive system to the outside;
An image forming apparatus comprising: The concealment position is a conveyance path side on which the drive system for driving a conveyance member that conveys the recording medium is disposed;
The image forming apparatus according to claim 1, wherein the exposure position is opposite to the conveyance path side with respect to the concealment position. The circuit board is a control board that sends a signal for driving the drive system to the apparatus body,
A power supply board that sends power for driving the drive system to the apparatus main body is disposed on the opposite side of the conveyance path from the control board at the concealment position,
The image forming apparatus according to claim 2, wherein the control substrate at the exposed position covers at least a part of the power supply substrate.   The image according to any one of claims 1 to 3, wherein wiring connected to the circuit board and the apparatus main body can be connected to the circuit board through different paths at the concealment position and the exposure position. Forming equipment.   The image forming apparatus according to claim 1, wherein a wiring connected to the circuit board and the apparatus main body has a length that does not reach the circuit board at the exposed position. Wiring connected to the circuit board and the apparatus body is connected from above and below the circuit board,
The image forming apparatus according to claim 1, wherein the exposure position is a position lateral to the concealment position.

Images