JP2016005230A - Image reading device, and image forming apparatus including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image reading device that, in opening the inside of a carriage to the outside to perform cleaning of an optical element and maintenance such as alignment, can improve working efficiency by enabling an operator to easily lay a feeder and preventing damage to the device caused by the contact between the optical element and the feeder; and an image forming apparatus.SOLUTION: Wiring processing on harnesses (80) are collectively performed at a predetermined position on a side wall on an opening/closing fulcrum side of a scanning unit (43); a lid-like holding member (62) is rotated with the opening/closing fulcrum as the substantial rotation center; the lid-like holding member (62) is opened to a housing (61) to enable exposure of an optical element inside the housing (61) to the outside. In performing maintenance work of the inside of the housing (61), a small distance of movement of the harnesses (80) can prevent the possibility of the contact between the harnesses (80) and other members, simplify laying of a feeder, and achieve both prevention of damage to the device and improvement of working efficiency.

Description

  The present invention relates to an image reading apparatus that reads a document or the like, and an image forming apparatus including the image reading apparatus.

In this type of image reading apparatus, an original is illuminated by a light source unit below the glass while being conveyed in the sub-scanning direction on the glass, and the original is mainly captured by an image sensor such as a CCD (Charge Coupled Device). Repeated scanning in the scanning direction for reading, or positioning and placing the document on the glass, illuminating the document with the light source while moving the light source and image sensor in the sub-scanning direction below the glass. Thus, the document is repeatedly scanned in the main scanning direction by the image sensor and read. There are various light source units for illuminating the document, and fluorescent lamps, LED arrays, and the like are used.

  In such an image reading apparatus, a light source or the like emits light for illuminating a document, and the document surface is irradiated with light through a light guide member or the like, and reflected light (reading light) reflected on the document surface is reflected. The image is reflected a plurality of times by a mirror or the like and reaches an imaging element such as a CCD along a predetermined optical path for imaging. Further, an image reading apparatus having a carriage structure in which a light source unit and a reading unit are integrated as in Patent Document 1 has been proposed.

  In an image reading apparatus having a carriage structure, there is a possibility that problems such as dust intrusion into the carriage and misalignment of optical elements such as mirrors and lenses may occur while the image reading apparatus is used. Since these problems hinder accurate image reading, when the image reading apparatus is continuously used, it is necessary to open the carriage structure and perform maintenance such as cleaning and alignment of the internal optical elements.

JP 2009-219011 A

  In Patent Document 1, a power supply line is laid on a light source mounting base and pulled into the carriage, and the light source mounting base is used as a cover of the carriage, thereby preventing the power supply line from being caught by peripheral members even during scanning. . However, in Patent Document 1, workability in the case of performing maintenance such as cleaning and alignment of optical elements inside the carriage is not particularly taken into consideration. In addition, since the power supply line is drawn into the carriage near the center in the sub-scanning direction of the light source mounting base, handling of the power supply line inside the carriage becomes complicated, and when an operator removes the light source mounting base, There is a possibility that the power supply line and the optical element come into contact with each other and are damaged, and it is necessary to pay sufficient attention to the handling of the power supply line, resulting in a decrease in work efficiency.

  Accordingly, the present invention has been made in view of the above-described conventional problems, and even in an image reading apparatus having a carriage structure in which a light source unit and a reading unit are integrated, the inside of the carriage is opened to clean and position the optical element. An image reading apparatus and an image which can improve the work efficiency by easily handling the power supply line of the worker when performing maintenance such as alignment, preventing damage to the apparatus due to contact between the optical element and the power supply line An object is to provide a forming apparatus.

  In order to solve the above problems, in the image reading apparatus of the present invention, the scanning body that scans the irradiated object has a casing and a lid-like holding member, and the casing reads the irradiated object. A reading unit is attached, and the lid-shaped holding member includes a light source unit that irradiates light toward the irradiated object, covers the opening of the casing, and is centered on an opening / closing fulcrum with respect to the casing The light source unit includes a long light guide member having translucency, and light emitting elements provided at one end and the other end in the longitudinal direction of the light guide member. At least two feeder lines for supplying current to the light emitting element and the light emitting element at the other end are collectively wired at a predetermined position on the side wall on the opening / closing fulcrum side of the scanning body.

  In such an image reading apparatus of the present invention, the power supply lines are collectively wired on the side wall on the opening / closing fulcrum side, so that maintenance work inside the casing can be performed with the lid-shaped holding member opened with respect to the casing. When performing, the lid-shaped holding member is rotated about the opening / closing fulcrum as the rotation center, and the movement distance of the feeder line wired on the side wall on the opening / closing fulcrum side can be minimized. Since the moving distance of the feeder line is small, the possibility that the feeder line comes into contact with other members can be reduced, and the handling of the feeder line becomes simple. Thus, the power supply line can be easily routed even during maintenance work, and the power supply line is not brought into contact with the surrounding members or the members inside the housing, so that both damage prevention and improvement in work efficiency can be achieved.

  In the image reading apparatus of the present invention, the housing includes a plurality of optical elements therein, and the optical elements are exposed through the opening when the lid-shaped holding member is opened with respect to the housing. Is done.

  Thereby, the operator who opened the lid-shaped holding member with respect to the housing can easily perform operations such as cleaning and alignment with respect to the optical elements such as the reflection mirror and the lens disposed in the housing.

  Furthermore, in the image reading apparatus of the present invention, the opening / closing fulcrum is engaged with a locking claw formed at one end of the lid-shaped holding member in the sub-scanning direction and the locking claw provided in the housing. And a claw fitting portion to be made.

  In this case, when the lid-like holding member is removed from the housing, the lid-like holding member is rotated about the locking claw as the rotation center, and the moving distance of the feeder line that is wired on the side surface on the opening / closing fulcrum side Can be minimized. In addition, since the opening / closing fulcrum can be configured with a simple structure of the locking claw and the claw fitting portion, it can be easily opened with respect to the housing of the lid-like holding member, and the handling of the feeder line is further simplified It becomes.

  In the image reading apparatus of the present invention, a flat cable is provided that is connected to the connection portion of the scanning body, is provided by being routed from the connection portion in the moving direction of the scanning body, and follows the movement of the scanning portion. The predetermined position and the connection part are located at substantially the same place in the main scanning direction of the scanning body.

  In this way, the power supply line is processed at approximately the same location as the flat cable, reducing the possibility of all wiring coming into contact with other members even when the lid-shaped holding member is removed from the housing. The work efficiency can be further improved.

  In the image reading apparatus of the present invention, the power supply line is embedded in a groove formed on a surface of the lid-shaped holding member facing the irradiated body.

  In this case, by being embedded in a groove provided on the upper surface side of the lid-shaped holding member, the power supply line connected to the light source unit is processed without protruding on the document side of the lid-shaped holding member, It can prevent contacting with a member. In addition, since the groove is provided on the upper surface side of the lid-shaped holding member, it is not necessary to route the feeder line inside the scanning body, and the entire feeder line can be wired outside the scanning body. The possibility that the optical member inside the housing and the feeder line come into contact with each other can be extremely reduced. As a result, the power supply line can be routed very easily during the operation of the image reading apparatus or during maintenance work, and the work efficiency can be further improved.

  On the other hand, an image forming apparatus of the present invention includes the image reading apparatus of the present invention and a printing unit that prints an image of the irradiated object read by the image reading apparatus on a recording sheet.

  Even in such an image forming apparatus, the same effects as the image reading apparatus of the present invention can be obtained.

  In the present invention, the power supply lines are collectively wired on the side wall on the side of the opening / closing fulcrum, so that the opening / closing fulcrum rotates substantially when the lid-shaped holding member is opened with respect to the case and maintenance work is performed inside the case. The lid-like holding member is rotated as the center, and the movement distance of the feeder line that is wired on the side wall on the opening / closing fulcrum side can be minimized. As a result, when performing maintenance such as cleaning and alignment of the optical element by opening the carriage interior, the operator can easily handle the power supply line and prevent damage to the device due to contact between the optical element and the power supply line. Thus, it is possible to provide an image reading apparatus and an image forming apparatus capable of improving work efficiency.

1 is a cross-sectional view illustrating an image forming apparatus including a first embodiment of an image reading apparatus of the present invention. FIG. 2 is a cross-sectional view illustrating the image reading device and the document conveying device of FIG. 1. It is sectional drawing which expands and shows a scanning unit. It is a perspective view which shows a scanning unit. It is a perspective view which expands and shows the edge part of a scanning unit. It is a perspective view which shows the scanning unit which wired the harness. It is a perspective view which shows the scanning unit of the state which opened the light source subunit with respect to the housing | casing from CCD subunit. It is a perspective view which shows the lower surface side of a scanning unit. It is a perspective view which expands and shows the edge part by the side of the lower surface of a scanning unit.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a sectional view showing an image forming apparatus provided with a first embodiment of an image reading apparatus of the present invention. The image forming apparatus 1 has a copying function of reading a document and printing it on a recording sheet, and includes an image reading device 2, a document conveying device 3, a printing unit 4, a paper feed cassette 5, and the like.

  The image data handled in the image forming apparatus 1 corresponds to a color image using each color of black (K), cyan (C), magenta (M), yellow (Y), or a single color (for example, black). This corresponds to the monochrome image used. For this reason, the printing unit 4 is provided with four developing devices 12, photosensitive drums 13, drum cleaning devices 14, and chargers 15 in order to form four types of toner images corresponding to the respective colors. Four image stations Pa, Pb, Pc, and Pd are configured in association with black, cyan, magenta, and yellow.

  In each of the image stations Pa, Pb, Pc, and Pd, after the residual toner on the surface of the photosensitive drum 13 is removed and collected by the drum cleaning device 14, the surface of the photosensitive drum 13 is set to a predetermined potential by the charger 15. It is charged uniformly, the surface of the photosensitive drum 13 is exposed by the optical scanning device 11, an electrostatic latent image is formed on the surface, and the electrostatic latent image on the surface of the photosensitive drum 13 is developed by the developing device 12, A toner image is formed on the surface of the photosensitive drum 13. As a result, a toner image of each color is formed on the surface of each photosensitive drum 13.

  Subsequently, while the intermediate transfer belt 21 is moved in the direction of the arrow C, the residual toner on the intermediate transfer belt 21 is removed and collected by the belt cleaning device 25, and then each color toner image is transferred onto the surface of each photosensitive drum 13. The toner images are sequentially transferred onto the belt 21 and overlapped to form a color toner image on the intermediate transfer belt 21.

  A nip area is formed between the intermediate transfer belt 21 and the transfer roller 26a of the secondary transfer device 26, and the recording sheet conveyed through the sheet conveyance path R1 is sandwiched and conveyed in the nip area. The color toner image on the surface of the intermediate transfer belt 21 is transferred onto a recording sheet. Then, the recording paper is sandwiched between the heating roller 31 and the pressure roller 32 of the fixing device 17 and heated and pressed to fix the color toner image on the recording paper.

  On the other hand, the recording sheet is pulled out from the sheet feeding cassette 5 by the pickup roller 33 and is conveyed through the sheet conveying path R 1, via the secondary transfer device 26 and the fixing device 17, and then the sheet discharge tray via the sheet discharge roller 36. To 39. In this paper conveyance path R1, after the recording paper is temporarily stopped and the leading edges of the recording paper are aligned, recording is performed in accordance with the transfer timing of the color toner image in the nip area between the intermediate transfer belt 21 and the transfer roller 26a. A registration roller 34 for starting the conveyance of the paper, each conveyance roller 35 for urging the conveyance of the recording paper, and a paper discharge roller 36 are arranged.

  When printing not only on the front side of the recording paper but also on the back side, the recording paper is conveyed in the reverse direction from the paper discharge roller 36 to the reverse path Rr, so that the front and back sides of the recording paper are reversed and the recording paper is registered. The image is guided again to the roller 34, and the image is recorded and fixed on the back surface of the recording paper, similarly to the front surface of the recording paper, and the recording paper is carried out to the paper discharge tray 39.

  Next, the image reading device 2 of the first embodiment will be described. FIG. 2 is a cross-sectional view showing the image reading device 2 and the document conveying device 3.

  In FIG. 2, the document conveying device 3 is pivotally supported on one side of the lower image reading device 2 by a hinge (not shown) and opened and closed by moving the front side up and down. When the document conveying device 3 is opened, the document placing glass 41 of the image reading device 2 is opened.

  The image reading apparatus 2 includes a document placing glass 41, a document reading glass 42, a scanning unit 43, and the like. The moving unit 44 includes a guide shaft 48 that guides the scanning unit 43 in the sub-scanning direction Y, a drive unit (not shown) that moves and positions the scanning unit 43 in the sub-scanning direction Y, and a flat cable 49. Yes.

  The flat cable 49 is a flexible flat cable (FFC), a flexible printed circuit board (FPC), and the like, and is drawn around in the sub-scanning direction Y inside the housing, and one end thereof is connected to the connector of the scanning unit 43. The end is connected to a connector fixed to the bottom of the housing. Further, the flat cable is bent and deformed in the vertical direction and the sub-scanning direction Y following the movement of the scanning unit 43 in the sub-scanning direction Y.

  The scanning unit 43 includes a light source unit, an imaging lens 46, a CCD (Charge Coupled Device) 47, first to fifth reflecting mirrors 51 to 55, and the document placement glass 41 and the document reading glass 42 by the moving unit 44. The original (irradiated body) placed on the original placing glass 41 is read (first reading mode), or the original (irradiated body) conveyed on the original reading glass 42 is moved. ) (Second reading mode).

  In the first reading mode, the scanning unit 43 is moved below the document placement glass 41 by the moving unit 44, the document transport device 3 is opened, the document is placed on the document placement glass 41, and the document transport device 3. Close. While the scanning unit 43 is moved by the moving unit 44 in the sub-scanning direction Y by a distance corresponding to the document size at a constant speed, the document on the document placement glass 41 is illuminated by the light source unit, and the reflected light is first reflected. Are sequentially reflected by the fifth reflecting mirrors 51 to 55 and guided to the imaging lens 46. The imaging lens 46 condenses the reflected light from the document on the CCD 47 (reading unit) and forms an image on the surface of the document on the CCD 47. The CCD 47 repeatedly scans the image on the document surface in the main scanning direction X and reads the image on the document surface.

  In the second reading mode, the scanning unit 43 is moved and positioned below the original reading glass 42 by the moving unit 44, and the original is pulled out from the original placing tray 56 by the original conveying device 3, and the sub scanning is performed on the original reading glass 42. It is conveyed in the scanning direction Y and discharged to the document discharge tray 57. When the original passes over the original reading glass 42, the light source unit of the scanning unit 43 illuminates the original surface through the original reading glass 42, and the reflected light from the original surface is reflected by the first to fifth reflections of the scanning unit 43. The light is sequentially reflected by the mirrors 51 to 55 and guided to the imaging lens 46. The reflected light from the document surface is condensed on the CCD 47 by the imaging lens 46, and the image on the document surface is formed on the CCD 47. The image on the document surface is repeatedly scanned in the main scanning direction X to read the image on the document surface.

  Next, the light source unit of the scanning unit 43 will be described. In the light source unit, the light guide members 71 are arranged on both sides of the slit St extending in the main scanning direction X, and the respective LEDs (light emitting elements) are arranged on the light incident surfaces at both ends of the light guide members 71 (FIG. Not shown). Instead of the LED, other types of semiconductor elements, light bulbs, and the like may be applied.

  The light guide member 71 is a substantially cylindrical or substantially quadrangular prism having translucency and is formed of a long translucent main body, each light incident surface is formed at both ends in the longitudinal direction of the translucent main body, A light emitting surface is formed on a side surface along the longitudinal direction of the translucent main body, and a light reflecting surface is formed on the other side surface facing the light emitting surface along the longitudinal direction of the translucent main body. The light guide member 71 is formed by molding an acrylic resin with a mold.

  In the light source unit having such a configuration, each LED faces the light incident surfaces at both ends of the light guide member 71, so that the light emitted from each LED enters the light incident surface of the light guide member 71. Then, the light is guided inside the light guide member 71 and directly emitted from the light emitting surface, or reflected by the light reflecting surface and emitted from the light emitting surface.

  The light exit surface of each light guide member 71 is directed to the same location of the document via the document placement glass 41 or the document reading glass 42, and each light emitted from the light exit surface of each light guide member 71. Is incident on the same portion of the document, the portion of the document is illuminated, and the reflected light reflected at that portion of the document is guided to the inside of the scanning unit 43 through the slit St as the reading light. The light is sequentially reflected by the fifth reflecting mirrors 51 to 55 and enters the CCD 47 through the imaging lens 46, and the image on the surface of the original is read by the CCD 47.

  Next, the configuration of the scanning unit 43 and the light source unit will be described in more detail. 3 is a sectional view showing the scanning unit 43, FIG. 4 is a perspective view showing the scanning unit 43, and FIG. 5 is an enlarged perspective view showing an end of the scanning unit 43. As shown in FIG. FIG. 6 is a perspective view showing the harness 80 subjected to wiring processing in the scanning unit 43.

  As shown in FIGS. 3 to 6, the scanning unit 43 includes a housing 61 having an opening on the upper side, a lid-like holding member 62 provided to be opened and closed by the opening on the upper side of the housing 61, a lid And a CCD substrate 63 provided on a side wall along the longitudinal direction (main scanning direction X) of the housing 61.

  An imaging lens 46 and first to fifth reflection mirrors 51 to 55 are provided inside the housing 61. Further, the lid-shaped holding member 62 substantially covers the upper opening of the casing 61 and holds the light source unit. Furthermore, the CCD 47 is mounted on the CCD substrate 63, and the light receiving surface of the CCD 47 faces the inside of the housing 61 through a slit (not shown) formed on the side wall of the housing 61.

  The first to fifth reflection mirrors 51 to 55 are formed by forming a reflection film on one surface of the glass by silver vapor deposition, a reflection surface on which the reflection film is formed, an end surface substantially orthogonal to the reflection surface, and a reflection surface. It has the opposite back surface, the cross-sectional shape is a substantially rectangular shape, and the corner | angular part is chamfered. The first to fifth reflecting mirrors 51 to 55 are fixed to the casing 61 by mirror holders (not shown), respectively, and are arranged at a predetermined position and a predetermined angle on the optical path of the reading light reflected by the document. The first reflecting mirror 51 is a mirror on which the reading light that has passed through the slit St of the lid-like holding member 62 is first incident, and is positioned substantially immediately below the slit St.

  The lid-shaped holding member 62 is formed with two fitting grooves 62a that are long in the main scanning direction X and slits St between the fitting grooves 62a. Each fitting groove 62a has a substantially cylindrical shape. The light guide member 71 is fitted. Therefore, each fitting groove 62a also has a shape of a partial cylindrical side surface. In the light source unit, the light of each LED (not shown) is incident on the light incident surfaces that are both ends of the light guide member 71, and the light is emitted from the light emission surface that is one side surface of each light guide member 71, This light is applied to the document through the document placement glass 41 or the document reading glass 42. The reading light reflected by the original passes through the original placing glass 41 or the original reading glass 42 and is guided to the inside of the housing 61 through the slit St of the lid-like holding member 62, and is provided with first to fifth reflecting mirrors 51 to 51. The light is sequentially reflected at 55 and enters the CCD 47 through the imaging lens 46.

  In addition to the two light guide members 71 and the four LEDs, the light source unit includes two LED substrates 64 each having two LEDs mounted thereon, and 2 provided to overlap the outer surface of each LED substrate 64. Individual heat sinks.

  Each light guide member 71 is fitted and held in the fitting groove 62 a of each shielding portion 62 b and 62 c of the lid-like holding member 62, and both end portions of each light guide member 71 are on both sides of the lid-like holding member 62. It extends to each connecting part. And the light-incidence surface of the two light guide members 71 is arrange | positioned at each opening hole of a connection part, LED board 64 and the heat sink 65 are attached to a connection part, and each LED on LED board 64 is each each of a connection part. It is arranged in the opening hole. Accordingly, both end portions of the two light guide members 71, each LED, the two LED substrates 64, and the two heat radiating plates 65 are arranged outside the housing 61.

  Between the shielding part 62c and the fitting groove 62a, a wiring groove 66 extending on the upper surface facing the document placing glass 41 and extending in the main scanning direction to lay the harness 80 (not shown in FIGS. 3 to 5). Is formed. A hooking rib 69 for locking the harness 80 is provided on the front side of the shielding part 62c in the image forming apparatus. Here, the front side in the image forming apparatus is a side on which an operation panel or the like of the image forming apparatus is disposed, and is a side where a user or a maintenance worker operates the image forming apparatus.

  Thus, the imaging lens 46 and the first to fifth reflection mirrors 51 to 55 are fixed inside the casing 61, and the CCD substrate 63 and the CCD 47 are attached to the outside to constitute a CCD subunit. The lid-shaped holding member 62 includes a fitting groove 62a and shielding portions 62b and 62c, and an LED substrate 64 including LEDs, a heat radiating plate 65, and a light guide member 71 are attached to form a light source subunit. Yes.

  As shown in FIGS. 4 to 6, two locking claws 67 are formed at the end portion of the shielding portion 62 c and are fitted to the claw fitting portions 70 formed on the side wall of the housing 61. . The shielding part 62b is formed with an opening for screwing, and is positioned and fixed by a screw 68 in a screwing hole provided on the housing 61 side. Thereby, the light source subunit is fixed to the CCD subunit, and the scanning unit 43 is assembled.

  As shown in FIG. 6, the two harnesses 80 are power supply lines connected to connectors provided on each LED board 64, and supply current to each LED board 64 to cause the LEDs to emit light. The harness 80 connected to the LED substrate 64 is drawn out from the gap between the housing 61 and the heat radiating plate 65 to the upper surface of the shielding portion 62c, embedded in the wiring groove 66, and subjected to wiring processing. In addition, the two harnesses 80 are wired along the light guide member 71 to the position where the hooking rib 69 of the shielding part 62c is formed, respectively, and near the position where the hooking rib 69 is formed. Wiring is performed toward the side wall, and two wires are taken out to the lower surface side of the housing 61 between the hook rib 69 and the housing 61. Here, the wiring groove 66 may be formed over the entire position where the harness 80 of the shielding part 62c is wired.

  Since the harness 80 is embedded in the wiring groove 66 provided on the upper surface side of the lid-like holding member 62, the harness 80 connected to the LED substrate 64 is wired without protruding from the document side of the lid-like holding member 62, The harness 80 can be prevented from coming into contact with other members. Further, since the wiring groove 66 is provided on the upper surface side of the lid-shaped holding member 62, it is not necessary to route the harness 80 inside the scanning body 43, and the entire harness 80 is subjected to wiring processing outside the scanning body 43. be able to.

  FIG. 7 is a perspective view showing a state where the light source subunit 82 is removed from the CCD subunit 81 during the maintenance work of the scanning unit 43. When the operator performs maintenance work such as cleaning the inside of the scanning unit 43 or adjusting the position of the optical element, the document placing device 3 of the image forming apparatus 1 of the present invention shown in FIG. The glass 41 is also opened together with the document conveying device 3, and the scanning unit 43 located inside the image reading device 2 is exposed. In FIG. 7, some of the optical elements such as the first to fifth reflection mirrors 55 and the imaging lens 46 inside the CCD subunit 81 are omitted.

  Next, the two screws 68 that fix the lid-like holding member 62 of the scanning unit 43 to the housing 61 are removed, and the lid is covered with the fitting portion of the locking claw 67 and the claw fitting portion 70 as a substantially central axis. The engagement of the locking claw 67 and the claw fitting portion 70 is released by rotating the shape holding member 62. Here, the locking claw 67 and the claw fitting portion 70 function as an opening / closing fulcrum for attaching the light source subunit 82 so as to be opened and closed. As a result, the light source subunit 82 is removed from the CCD subunit 81, and the first to fifth reflecting mirrors 51 to 55 and the imaging lens 46 fixed inside the CCD subunit 81 open the opening of the housing 61. Exposed through.

  In the operation of removing the light source subunit 82, the CCD subunit 81 may be disposed inside the image reading device 2, and the first to first fixed in the housing 61 without removing the entire scanning unit 43. The optical elements such as the five reflecting mirrors 51 to 55 and the imaging lens 46 can be exposed to a workable state. Therefore, the operator can easily perform operations such as cleaning and alignment with respect to the optical element disposed in the housing 61.

  The harness 80 is drawn downward from the side wall provided with the opening / closing fulcrum of the housing 61 through the hook rib 69. Accordingly, during the maintenance operation of rotating the lid holding member 62 about the opening / closing fulcrum to release the engagement between the locking claw 67 and the claw fitting portion 70 and removing the lid holding member 62, The moving distance of the harness 80 can be minimized. Since the moving distance of the harness 80 is small, the possibility that the harness 80 comes into contact with other members can be reduced, and the handling of the harness 80 is simplified. Further, since the harness 80 is pulled out between the hook rib 69 and the housing 61, the maintenance work can be performed while the harness 80 is held at a predetermined position of the lid holding member 62 by the hook rib 69.

  Further, the position where the hook rib 69 is provided is on the front side where the operator faces the image forming apparatus 1 rather than the locking claw 67 and the claw fitting portion 70 which are opening and closing fulcrums. In the opening / closing operation of the shape holding member 62, the operator can easily confirm the position of the harness 80, and the workability is improved.

  Next, the wiring process on the lower surface side of the scanning unit 43 will be described. FIG. 8 is a perspective view showing the lower surface side of the scanning unit 43, and FIG. 9 is an enlarged perspective view showing an end portion of the lower surface side of the scanning unit 43.

  As shown in FIGS. 8 and 9, on the lower surface side of the scanning unit 43, an LED drive board 83 mounted with a drive circuit for performing LED drive control on the back surface of the housing 61 is attached. The LED drive board 83 is provided with a plurality of connectors that are connected to the wiring drawn from the drive circuit, one of which is connected to the harness 80 and the other is connected to the wiring 84. ing. The wiring 84 is wired between the side wall of the housing 61 and the CCD substrate 63, and the other end is connected to a connector provided on the CCD substrate 63. Further, the CCD substrate 63 is provided with an external connection connector 85, and a flat cable 49 passed through the lower side of the scanning unit 43 is connected. 8 and 9, two wires are drawn as the wires 84, but any number of wires may be connected as long as it is a necessary number.

  The flat cable 49 is connected to a connector that is routed from the scanning unit 43 and fixed to the bottom of the image reading apparatus 2 as shown in FIG. 1, and supplies power and control signals to the scanning unit 43. The image data of the original read by the scanning unit 43 is transmitted. That is, power and control signals are supplied to the CCD substrate 63 via the flat cable 49, and the CCD 47 is driven and image data is transmitted. Further, power is supplied and signals are transmitted from the CCD substrate 63 to the LED drive substrate 83 via the wiring 84, and power and signals are transmitted from the LED drive substrate 83 to the LED substrate 64 and the LED via the harness 80. Is done.

  The position of the connector to which the harness 80 of the LED drive board 83 is connected is below the position where the hook rib 69 is formed as shown in FIGS. The harness 80 is connected to the LED drive board 83 through the gap. The position where the hook rib 69 is formed is substantially the same position as the external connection connector 85 to which the flat cable 49 is connected in the main scanning direction of the scanning unit 43.

  Even during the operation of removing the lid-shaped holding member 62, the positions of the flat cable 49 and the wiring 84 on the lower surface of the scanning unit 43 do not change. Further, the position of the harness 80 between the side wall of the housing 61 and the CCD substrate 63 and the position connected to the LED drive substrate 83 does not change even when the lid-shaped holding member 62 is removed.

  Accordingly, since the harness 80 is wired at substantially the same location as the flat cable 49 and the wiring 84, the operator performs all wiring including the harness 80 during maintenance work for removing the light source subunit 82 from the CCD subunit 81. This makes it easier to confirm the position of the wire, and further reduces the possibility that all the wiring contacts other members, thereby improving the workability.

(Second Embodiment)
The structure of the opening / closing fulcrum is not limited to the fitting structure of the locking claw 67 and the claw fitting portion 70. For example, a cylindrical boss (support shaft) is provided on the lid-like holding member 62, and the boss is provided on the casing 61. A hole that allows the lid-shaped holding member 62 to rotate may be used. Conversely, a cylindrical boss may be used for the housing 61, and a hole for allowing the lid-like holding member 62 to rotate by entering the boss into the lid-like holding member 62. In addition to the above structure, a hinge structure or the like may be used. Further, in the fitting structure of the locking claw 67 and the claw fitting portion 70, the structure of the support shaft and the hole, and the hinge structure, the lid-like holding member 62 is opened at a predetermined angle when opened and closed with respect to the housing 61. In order to maintain the above, the housing 61 may be provided with a stopper (regulator) not shown.

(Third embodiment)
The position where the wiring groove 66 is formed may be the lower surface on the opposite side of the surface facing the document placement glass 41 of the lid-like holding member 62. Moreover, the rear side may be used as the side where the hook rib 69 is provided and the harness 80 is pulled out. Here, the rear side in the image forming apparatus is a side facing the front side.

  As mentioned above, although preferred embodiment and modification of this invention were described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. It is understood.

DESCRIPTION OF SYMBOLS 1 Image forming apparatus 2 Image reading apparatus 3 Document conveying apparatus 4 Printing part 5 Paper feed cassette 43 Scanning unit (scanning body)
45 Illumination device 46 Imaging lens 47 CCD (reading unit)
51-55 First to Fifth Reflection Mirrors 61 Case 62 Lid Holding Member 63 CCD Substrate 64 LED Substrate 65 Heat Dissipation Plate 66 Wiring Groove 67 Locking Claw 68 Screw 69 Hook Rib 70 Claw Fitting Part 71 Light Guide Member 80 Harness (Feed line)
81 CCD subunit 82 Light source subunit 83 LED drive board 84 Wiring 85 External connection connector St Slit

Claims (6)

The scanning body that scans the irradiated body has a housing and a lid-like holding member,
The housing is provided with a reading unit for reading the irradiated object,
The lid-shaped holding member includes a light source unit that emits light toward the irradiated object, covers the opening of the housing, and is attached to the housing so as to be openable and closable around an opening / closing fulcrum. ,
The light source unit has a long light guide member having translucency, and light emitting elements provided at one end and the other end in the longitudinal direction of the light guide member,
At least two feeders for supplying current to the light emitting element at the one end and the light emitting element at the other end are collectively wired at a predetermined position on the side wall on the opening / closing fulcrum side of the scanning body. An image reading apparatus. The image reading apparatus according to claim 1,
The housing includes a plurality of optical elements therein, and the optical element is exposed through the opening when the lid-shaped holding member is opened with respect to the housing. . The image reading device according to claim 1 or 2,
The opening / closing fulcrum includes a locking claw formed at one end of the lid-shaped holding member in the sub-scanning direction, and a claw fitting portion for fitting the locking claw provided in the housing. An image reading device. The image reading apparatus according to any one of claims 1 to 3,
Connected to the connection part of the scanning body, provided by being routed from the connection part in the moving direction of the scanning body, and having a flat cable that follows the movement of the scanning unit,
The image reading apparatus according to claim 1, wherein the predetermined position and the connection portion are located at substantially the same position in the main scanning direction of the scanning body. An image reading apparatus according to any one of claims 1 to 4,
The image reading apparatus, wherein the power supply line is embedded in a groove formed on a surface of the lid-shaped holding member facing the irradiated body. An image reading device according to any one of claims 1 to 5,
An image forming apparatus comprising: a printing unit that prints an image of the irradiated object read by the image reading device on a recording sheet.

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