JP6234133B2 - Image reading device - Google Patents

Description

  The present invention relates to an image reading apparatus used for a copying machine, a facsimile machine, an image scanner, and the like.

  2. Description of the Related Art In an image reading apparatus, an automatic document feeder (ADF) that automatically feeds and reads a document loaded on a tray is generally used.

  An automatic document feeder (hereinafter referred to as “ADF”) includes electrical components such as a motor and a sensor. Cables necessary for power supply to electrical components, transmission of control signals, and the like are generally wired from a reader unit disposed below the ADF. From the viewpoint of ensuring electrical safety, downsizing of the device, and aesthetics, the cable is required to pass through the machine without passing through the outside of the device.

  Patent document 1 provides the cable guide which hold | maintains a cable, without damaging. For this purpose, a cable guide is formed through which a cable connecting the ADF and the reader unit by the first and second guide members is inserted. Furthermore, it is described that the fixed end of the second guide member is aligned with the rotation center axis of the hinge member of the ADF.

JP 2009-216828 A

  However, in patent document 1, the cable guide is comprised by the some member. This increases the part cost. In addition, since both the leader part and the ADF have a rotation fulcrum, there is a problem that the work for fixing the rotation fulcrum is necessary after the leader part and the ADF are combined, resulting in poor assembly workability.

  The present invention solves the above-mentioned problems, and the object of the present invention is to realize in-machine wiring of the cable between the image reading unit and the document feeding unit without increasing the number of members, and increase the cost of parts. The present invention also provides an image reading apparatus that can prevent a reduction in assembly workability.

A typical configuration of the image reading apparatus according to the present invention for achieving the above object is provided with an image reading unit for reading a document image, and a rotatable member with respect to the image reading unit via a hinge member. includes a document feeding unit for feeding the document to the image reading portion, said document feeding unit includes a first posture in which the document feeding unit is closed with respect to the image reading unit, the document A second feeding unit is rotated about the pivot center of the hinge member, and an open end of the document feeding unit opposite to the pivot center is opened with respect to the upper surface of the image reading unit. and orientation of the third position in which the document feeding unit is lifted up to the upper surface of the image reading unit in the first position substantially parallel posture, it is possible to take, the image reading The image reading unit inserts a cable connected to an electrical component provided in the document feeding unit into the image reading unit. The cable guide portion includes an image reading portion wall portion located closer to the open end portion than the inserted cable, and the hinge member includes: A stopper for restricting upward movement of the document feeding unit relative to the image reading unit in the third posture, wherein the document feeding unit includes the first posture, the second posture, and In any state of the third posture at a position where the upward movement of the image reading unit is restricted by the stopper unit, the image reading unit wall portion is directed from the open end to the rotation center. The image reading unit wall portion is deformed when the document feeding unit changes from the first posture to the second posture. especially that it does not To.

  According to the above configuration, it is possible to realize in-machine wiring of the cable between the image reading unit and the document feeding unit without increasing the number of members, and it is possible to prevent an increase in parts cost and a decrease in assembly workability.

1 is a cross-sectional explanatory diagram illustrating a configuration of a first embodiment of an image reading apparatus according to the present invention. (A)-(c) is a perspective explanatory drawing which shows the 1st-3rd attitude | position of a document feeding part. FIG. 10 is an explanatory cross-sectional view showing a state in which a locking portion provided in the insertion portion of the hinge member engages with a stopper portion provided protruding from a wall surface of a hole provided in the image reading portion. FIG. 3 is an explanatory cross-sectional view illustrating a first posture of a document feeding unit according to the first embodiment. FIG. 6 is a cross-sectional explanatory diagram illustrating a second posture of the document feeding unit according to the first embodiment. FIG. 6 is a cross-sectional explanatory diagram illustrating a third posture of the document feeding unit according to the first embodiment. It is a block diagram which shows the structure of the control system of 1st Embodiment. It is an isometric view explanatory drawing which shows the structure of the cable guide part of 1st Embodiment, and a hollow part. It is a cross-sectional explanatory view showing the configuration of a second embodiment of the image reading apparatus according to the present invention. It is a block diagram which shows the structure of the control system of 2nd Embodiment. FIG. 10 is a cross-sectional explanatory diagram illustrating a second posture of the document feeding unit according to the second embodiment. It is an isometric view explanatory drawing which shows the structure of the hinge member of a comparative example.

  An embodiment of an image reading apparatus according to the present invention will be specifically described with reference to the drawings.

<Image reading device>
First, the configuration of the first embodiment of the image reading apparatus according to the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view showing a schematic configuration of an image reading apparatus 4 of the present embodiment. 1 and 2, the image reading device 4 includes an image reading unit 101 that reads a document image of a document 1 at the top of the apparatus body.

  Further, an automatic document feeder (ADF; Auto Document Feeder, hereinafter referred to as “ADF”) 201 which is a document feeding unit can be rotated with respect to the upper surface of the image reading unit 101 via hinge members 224 and 225. Provided. The ADF 201 automatically feeds the sheet-like document 1 to the upper surface of the image reading unit 101.

  The optical box 102 for reading the image of the document 1 has a light source 103 for irradiating the document 1 with light and a mirror 104 for guiding diffused light from the document 1. Furthermore, a lens 105 that forms an image of light and a photoelectric conversion element 106 that serves as an image reading unit that photoelectrically converts the imaged light to read it electrically are mounted.

  The optical box 102 is supported by a motor 107 and a timing belt 108 so as to be capable of reciprocating inside the image reading unit 101. Then, the document image is read by moving and scanning the lower surface of the document 1 placed on the transparent document table glass 109 provided on the upper surface of the image reading unit 101.

  A transparent flow reading glass 110 is provided adjacent to the platen glass 109. Then, the optical box 102 is stopped immediately below the flow reading glass 110 and is used when reading the original image by supporting the lower surface of the original 1 automatically fed by the ADF 201 with the flow reading glass 110.

<Original feeding section>
Next, the configuration of the ADF 201 serving as a document feeding unit will be described. Reference numeral 202 denotes a document tray on which a bundle of sheet-like documents 1 is stacked, and 203 denotes a pickup roller that feeds the documents 1 stacked on the document tray 202 into the ADF 201. Reference numeral 204 denotes a separation roller; 223, a separation pad; 205 to 209, a feeding roller that feeds the document; and 210, a discharge roller that discharges the document 1 fed by the feeding rollers 205 to 209. Reference numeral 212 denotes a discharge tray on which the documents 1 discharged by the discharge roller 210 are stacked. Reference numeral 2 denotes a pick-up roller 203 and a separation motor that rotationally drives the separation roller 204, and 3 denotes a feed motor that rotationally drives the feed rollers 205 to 209 and the discharge roller 210.

<Control unit>
FIG. 7 is a block diagram showing the configuration of the control system of this embodiment. In FIG. 7, 401 is a main control unit that controls the operation of the entire image reading apparatus 4. A scanner control unit 402 controls the image reading unit 101, and an ADF control unit 403 controls the ADF 201. A scanner control unit 402 controls the motor 107, the light source 103 in the optical box 102, and the photoelectric conversion element 106. The ADF control unit 403 includes a motor control unit 404, and the motor control unit 404 controls the separation motor 2 and the feeding motor 3.

  When the original image of the original 1 placed on the original table glass 109 is read, the optical box 102 is moved by the motor 107 and the timing belt 108. Further, the light source 103 irradiates the original surface of the original 1 with light, and the diffused light on the original surface of the original 1 is imaged on the photoelectric conversion element 106 by the action of the mirror 104 and the lens 105. Read the image electrically.

  On the other hand, when the original image of the sheet-like original 1 fed by the ADF 201 is read, first, the optical box 102 is flowed by the motor 107 and the timing belt 108 and moved to a position immediately below the reading glass 110 to be stopped. Then, the separation motor 2 is driven to rotate, the pickup roller 203 is rotated, and the sheet-like document 1 stacked on the document tray 202 is fed into the ADF 201.

  The document 1 is separated and fed one by one by the separation roller 204 and the separation pad 223. Then, the document 1 is fed in the order of the feed rollers 205 to 209 and the discharge roller 210 which are rotationally driven by the forward rotation of the feed motor 3. The document image of the document 1 is electrically read by the optical box 102 in the process, and is discharged onto the discharge tray 212 by the discharge roller 210.

<Attitude of the document feeder>
FIG. 2 shows the attitude of the ADF 201 with respect to the image reading unit 101. FIG. 2A shows a first posture in which the ADF 201 is closed with respect to the upper surface of the image reading unit 101. When the original image is read by the image reading unit 101, the ADF 201 is closed with respect to the image reading unit 101 as shown in FIG.

  FIG. 2B shows a second posture in which the ADF 201 is rotated about the rotation center 350 of the hinge members 224 and 225 and opened with respect to the upper surface of the image reading unit 101. When the document 1 is placed on the document table glass 109, or when the document 1 placed on the document table glass 109 is taken out, the ADF 201 is as follows. That is, as shown in FIG. 2B, the open end of the ADF 201 opposite to the rotation center 350 is opened with respect to the upper surface of the image reading unit 101 by the action of the hinge members 224 and 225. The cable guide portions 303 (FIG. 5) and 704 (FIG. 11) shown in FIG. 2B will be described later.

  FIG. 2C shows a third posture in which the ADF 201 is lifted upward with respect to the upper surface of the image reading unit 101 in a posture substantially parallel to the first posture shown in FIG. A thick document 1, for example, a document 1 such as a book, is placed on the document table glass 109, and the ADF 201 is closed with respect to the upper surface of the image reading unit 101. At that time, as shown in FIG. 2C, the ADF 201 can take a posture of being lifted substantially parallel to the upper surface of the image reading unit 101 by the thickness of the document 1. As shown in FIGS. 2A to 2C, the ADF 201 is provided to be changeable from the first posture to the third posture.

  FIG. 3 shows the configuration of the hinge members 224 and 225 when the ADF 201 is lifted upward with respect to the upper surface of the image reading unit 101 in the third posture shown in FIG. In FIG. 3, an insertion portion 901 that is a leg portion of the hinge members 224 and 225 is inserted into a hole portion 801 provided in the image reading portion 101 so as to be movable up and down. The upper end of the wall surface 101a of the hole 801 is provided with a locking portion 101b protruding toward the hole 801, and the locking portion 101b is provided at the lower end of the insertion portion 901 that serves as the legs of the hinge members 224 and 225. A stopper portion 901a is provided so as to protrude opposite to the above.

  The stopper portion 901a is provided so as to protrude from the insertion portion 901 which is a leg portion of the hinge members 224 and 225. Then, the insertion portion 901 comes into contact with the locking portion 101b protruding from the upper end portion of the wall surface 101a of the hole portion 801 into which the insertion portion 901 is freely moved up and down. Accordingly, the ADF 201 regulates the distance between the upper surface of the image reading unit 101 and the lower surface of the ADF 201 in the third posture shown in FIG. 2C, that is, the maximum lifting height Hm shown in FIG.

  That is, the hinge members 224 and 225 have a stopper portion 901a that restricts the upper limit position of the ADF 201 with respect to the image reading portion 101 in the third posture shown in FIG.

<Cable>
4 to 6 are DD sectional views of FIG. 1, showing first to third postures of the ADF 201, respectively. 4 to 6, a control board 301 having a scanner control unit 402 and an ADF control unit 403 is provided inside the image reading unit 101. Separation motor 2 and the feeding motor 3 is provided inside the ADF201 is rotated driven by a motor control unit 4 04 provided on the control board 301 provided inside the image reading unit 101 is controlled. The separation motor 2 and the feeding motor 3 and the control board 30 1 is electrically connected by a cable 302.

  FIG. 8 is a perspective view showing a state in which a part of the ADF 201 is omitted and the cable guide portion 303 and the recessed portion 304 are exposed in order to explain the relationship between the cable guide portion 303 and the recessed portion 304. As shown in FIG. 2B, the two hinge members 224 and 225 are provided at a predetermined interval so as to rotatably support the ADF 201 with respect to the image reading unit 101.

  The cable guide portion 303 and the recess portion 304 are provided between the two hinge members 224 and 225. Therefore, the cable guide part 303 and the hollow part 304 have the following wall surfaces 303a and 304a forming the respective parts. Of the wall surfaces 303a and 304a, the wall surface on the open end side of the ADF 201 with respect to the inserted cable 302 is overlapped in the vicinity of the rotation center 350 so as to overlap in any of the first to third postures of the ADF 201. Can fit in a small space.

  On the upper surface side of the image reading unit 101, as shown in FIG. 8, a hollow and protruding cable guide portion 303 into which a cable 302 is inserted is provided so as to protrude upward. The ADF 201 and the image reading unit 101 are electrically connected by a cable 302. In order to control the separation motor 2 and the feeding motor 3, the cable 302 passes from the control board 301 provided in the image reading unit 101 to the inside of the cable guide unit 303 and enters the ADF 201. Connected to the feed motor 3.

  As shown in FIG. 8, the lower surface side of the ADF 201 has an inner diameter larger than the outer diameter of the cable guide portion 303 corresponding to the cable guide portion 303 provided on the upper surface side of the image reading unit 101. A recessed portion 304 into which the cable guide portion 303 is inserted is provided.

  As shown in FIG. 2B, the ADF 201 is rotated about the rotation center 350 of the hinge members 224 and 225, and the open end of the ADF 201 is opened with respect to the upper surface of the image reading unit 101. In posture. At that time, as shown in FIG. 5, the wall surface 304 a forming the depression 304 provided on the lower surface side of the ADF 201 is formed so as not to contact and interfere with the wall surface 303 a of the cable guide 303.

  The rear side wall surface 304a1 on the rear side of the image reading apparatus 4 shown on the left side of FIG. 5 that forms the depression 304 when the ADF 201 shown in FIG. 5 is fully opened is prevented from colliding with the cable guide 303. For this reason, the rear side wall surface 304a1 that forms the recessed portion 304 cannot be disposed within the range of the maximum opening angle θm shown in FIG. 4 from the rear side wall surface 303a1 of the cable guide portion 303. Therefore, a gap 305 is provided on the lower extension of the rear side wall surface 304a1.

Cable 302 having one end connected to the control board 30 1 provided inside the image reading unit 101, through the interior of the cable guide portion 303 in communication with the interior space of the image reading unit 101. Further, it is guided to the inside of the ADF 201 through a through hole 304 b that penetrates a part of the wall surface 304 a of the recess 304 and is connected to the separation motor 2 and the feed motor 3. At this time, the front side wall surface 304a2 on the open end side of the ADF 201 with respect to the cable 302 inserted through the hollow portion 304 is also located on the open end side of the ADF 201 with respect to the front end portion 303b of the cable guide portion 303. And overlap.

  Accordingly, even when the open end of the ADF 201 is in the second posture opened with respect to the upper surface of the image reading unit 101, the cable 302 is not exposed to the open end (outside the apparatus). Therefore, it is possible to maintain electrical safety and aesthetics for the user.

  The front end 303b on the front side (open end) side of the image reading device 4 shown on the right side of the cable guide 303 in FIG. 5 has the following shape. That is, the ADF 201 is formed in an arc shape having a radius of curvature around the rotation center 350 when the ADF 201 is rotated about the rotation center 350 of the hinge members 224 and 225 to be opened with respect to the image reading unit 101. ing.

  On the front side of the cable guide portion 303, the recess 304 provided on the lower surface side of the ADF 201 rotates inside the rotation locus a when the ADF 201 rotates integrally around the rotation center 350 of the hinge members 224 and 225. The tip portion 303b is formed in an arc shape. Therefore, when the ADF 201 is rotated to the second posture shown in FIG. 2 (b), the rotation locus a of the front side wall surface 304a2 on the open end side of the ADF 201 shown on the right side in FIG. The wall surface forming the cable guide portion 303 does not interfere.

  That is, the wall surface 303a forming the cable guide portion 303 is based on the rotation locus a when the wall surface 304a forming the recess portion 304 rotates integrally with the ADF 201 around the rotation center 350 of the hinge members 224 and 225. Is also formed inside.

  Thereby, when the ADF 201 is opened, the gap 351 formed between the cable guide portion 303 and the recess portion 304 can be reduced, and foreign matter can be prevented from entering.

  As shown in FIG. 2C, the ADF 201 can take a third posture that is lifted substantially parallel to the image reading unit 101. 6 is a cross-sectional view taken along the line DD of FIG. 1 when the ADF 201 is in the third posture. As shown in FIG. 6, the maximum lifting height Hm at which the ADF 201 is lifted substantially parallel to the image reading unit 101 is as follows.

  That is, as shown in FIG. 3, the maximum lifting height Hm is regulated by the stopper portion 901a of the insertion portion 901 provided on the leg portions of the hinge members 224 and 225 coming into contact with the locking portion 101b. The locking portion 101b is provided to protrude from the upper end portion of the wall surface 101a of the hole portion 801 provided on the upper surface side of the image reading portion 101.

  As shown in FIG. 6, the insertion height Hi at which the cable guide portion 303 protruding from the upper surface side of the image reading portion 101 is inserted into the recess portion 304 provided on the lower surface side of the ADF 201 is the maximum lifting height. It is set to be larger than the height Hm.

  That is, the wall surfaces 303a and 304a on the open end side of the cable guide portion 303 and the hollow portion 304 overlap at the upper limit position of the ADF 201 regulated by the stopper portion 901a.

  Therefore, even when the ADF 201 is lifted substantially parallel to the image reading unit 101 corresponding to a thick document 1 such as a book, the cable 302 passing through the hollow interior of the cable guide unit 303 is a device on the open end side. It is not exposed to the outside. For this reason, it is possible to maintain electrical safety and aesthetics for the user.

  In the present embodiment, a cable guide portion 303 provided so as to protrude from the upper surface side of the image reading unit 101 of the image reading device 4 is inserted into a hollow portion 304 provided on the lower surface side of the ADF 201. Further, the image reading unit 101 and the ADF 201 are electrically connected through the cable 302 to the hollow inside of the cable guide unit 303.

  As a result, in-machine wiring of the cable 302 can be realized between the image reading unit 101 and the ADF 201 without increasing the number of members, and an increase in component costs and a reduction in assembly workability can be prevented.

  In this embodiment, the cable 302 connected from the control board 301 provided in the image reading unit 101 to the separation motor 2 and the feeding motor 3 provided in the ADF 201 is as follows. In other words, the hollow portion of the cable guide portion 303 provided so as to protrude from the upper surface side of the image reading portion 101 is passed.

  However, the configuration of the cable 302 need not be limited to this, and for example, the control board 301 may not be provided in the main body of the image reading apparatus 4. In this case, the present invention can also be applied to a case where a cable directly wired inside the ADF 201 is passed from a control device that controls the entire copying machine, facsimile machine, or the like to which the image reading device 4 is connected. Further, the present invention can be similarly applied to a case where there is a cable made of bundled wires connected to various sensors provided in the ADF 201 in addition to the motor.

  Next, the configuration of the second embodiment of the image reading apparatus according to the present invention will be described with reference to FIGS. In addition, what was comprised similarly to the said 1st Embodiment attaches | subjects the same member name even if the same code | symbol or a code | symbol differs, and abbreviate | omits description.

  In the first embodiment, the ADF 201 rotates to the second posture shown in FIG. At that time, as shown in FIG. 5, the wall surface 304 a that forms the depression 304 provided on the lower surface side of the ADF 201 contacts the wall surface 303 a of the cable guide portion 303 provided so as to protrude from the upper surface side of the image reading unit 101. Formed so as not to interfere.

  In the present embodiment, as shown in FIG. 11, a document that is rotatably provided via hinge members 224 and 225 with respect to the image reading unit 101 that reads a document image, and feeds the document 1 to the image reading unit 101. The ADF 201 serving as the feeding unit rotates to the second posture.

  At that time, the back side wall surface 705a1 on the back side of the image reading device 4 shown on the left side of FIG. 11 in the wall surface 705a forming the recess 705 provided on the lower surface side of the ADF 201 abuts the back side wall surface 704a1. The rear side wall surface 704a1 is a wall surface on the rear side of the image reading device 4 shown on the left side of FIG. 11 among the wall surfaces 704a of the cable guide portion 704 provided so as to protrude from the upper surface side of the image reading unit 101 that reads a document image. . As a result, the maximum opening angle θm of the ADF 201 is regulated.

  That is, when the ADF 201 is changed to the second posture shown in FIG. 2B, the wall surface 705a that forms the recessed portion 705 contacts the wall surface 704a that forms the cable guide portion 704, and the maximum opening angle θm of the ADF 201 is increased. Be regulated.

  In the present embodiment, in addition to the configuration of the first embodiment, as shown in FIG. 9, a second optical box 501 for reading a document image on the back side of the document 1 is provided inside the ADF 201. The document 1 can be read on the front and back surfaces of the document 1 by feeding the document 1 once.

  In FIG. 9, reference numeral 501 denotes a second optical box which is provided inside the ADF 201 and reads a document image on the back side of the document 1 being fed. The second optical box 501 has a light source 502 for irradiating light on the document 1, a mirror 503 for guiding diffused light from the document 1, a lens 504 for imaging light, and photoelectrically converting the imaged light to electrically read it. A photoelectric conversion element 505 is mounted.

  FIG. 10 is a block diagram showing the configuration of the control system of the image reading apparatus 4 of this embodiment. In FIG. 10, 601 is a main control unit that controls the operation of the image reading apparatus 4, 602 is a scanner control unit that controls the image reading unit 101, and 603 is an ADF control unit that controls the ADF 201.

  The scanner control unit 602 controls the motor 107, the light source 103 in the optical box 102, and the photoelectric conversion element 106. The ADF control unit 603 includes a motor control unit 604 and a second optical box control unit 605. The motor control unit 604 controls the separation motor 2 and the feeding motor 3 provided in the ADF 201. The second optical box control unit 605 controls the light source 502 and the photoelectric conversion element 505 included in the second optical box 501.

  As in the first embodiment, the document 1 is fed and the document image is read. In the present embodiment, the document image on the surface side of the document 1 (the upper surface side of the document 1 on the document tray 202 in FIG. 9) is read by the optical box 102 in the course of feeding the document 1 by the ADF 201. Further, the second optical box 501 reads a document image on the back side of the document 1 (the lower surface side of the document 1 on the document tray 202 in FIG. 9).

  11 is a cross-sectional view taken along the line FF in FIG. 9 when the ADF 201 is rotated to the maximum opening angle θm with respect to the image reading unit 101 around the rotation center 350 of the hinge members 224 and 225 and is in the second posture. It is. Similar to the first embodiment, the posture of the ADF 201 of the present embodiment also has a first posture in which the ADF 201 is closed with respect to the image reading unit 101 as shown in FIG.

  Further, as shown in FIG. 2B, the ADF 201 has a second posture in which the ADF 201 is rotated about the rotation center 350 of the hinge members 224 and 225 and opened with respect to the image reading unit 101. Further, as shown in FIG. 2C, the ADF 201 has a third posture lifted with respect to the image reading unit 101 in a posture substantially parallel to the first posture shown in FIG.

  Also in this embodiment, as shown in FIG. 3 and described above, a stopper portion 901a is provided to protrude from the lower end portion of the insertion portion 901 that is a leg portion of the hinge members 224 and 225. The stopper portion 901a comes into contact with a locking portion 101b provided to project from the wall surface 101a of the hole portion 801 provided on the upper surface portion of the image reading portion 101. Thereby, the ADF 201 regulates the maximum lifting height Hm with respect to the image reading unit 101 in the third posture shown in FIG.

  The insertion height Hi of the cable guide portion 704 with respect to the hollow portion 705 is set to be larger than the maximum lifting height Hm. When the ADF 201 is rotated to the second posture shown in FIG. 2B, the back side wall surface 705 a 1 on the back side forming the recess 705 comes into contact with the back side wall surface 704 a 1 on the back side of the cable guide unit 704, and the ADF 201. The maximum opening angle θm is regulated.

  The front end 704b on the front side of the cable guide portion 704 is centered on the rotation center 350 when the ADF 201 is rotated about the rotation center 350 of the hinge members 224 and 225 and opened to the image reading unit 101. It has a circular arc shape with a radius of curvature. For this reason, the recess 705 provided on the lower surface side of the ADF 201 rotates integrally with the ADF 201 around the rotation center 350 of the hinge members 224 and 225. At this time, the cable guide portion 704 does not interfere with the rotation locus a of the front side wall surface 705a2 on the front side of the image reading apparatus 4 shown on the right side of the hollow portion 705 in FIG.

  In FIG. 11, a control board 701 having a scanner control unit 602 and an ADF control unit 603 is provided inside the image reading unit 101. The control board 701 controls the separation motor 2, the feed motor 3, and the second optical box 501 provided in the ADF 201. Further, the image signal of the original image read by the second optical box 501 is received by the control board 701 and processed.

  The transmission of the control signal and the image signal of the second optical box 501 is generally performed using a flexible flat cable (FFC) 703 because of the large number of necessary lines.

  A cable 702 for controlling the motors of the separation motor 2 and the feeding motor 3 and a cable 703 for transmitting control signals and image signals of the second optical box 501 electrically connect the ADF 201 and the image reading unit 101.

  Cables 702 and 703 are hollow interiors of a protruding cable guide portion 704 provided so as to protrude from a control board 701 provided inside the image reading portion 101 to the upper surface side of the image reading portion 101 communicating with the inside of the image reading portion 101. Pass through. Then, it enters the ADF 201 through a through hole 705b that penetrates the wall surface 705a forming the recess 705.

  The cable 702 for motor control is connected to the separation motor 2 and the feeding motor 3, and the cable 703 for transmission of the control signal and image signal of the second optical box 501 is connected to the second optical box 501, respectively. The

  On the lower surface side of the ADF 201, a recess portion 705 into which a cable guide portion 704 provided so as to protrude from the upper surface side of the image reading unit 101 is provided. As shown in FIG. 11, the ADF 201 is rotated and opened with respect to the image reading unit 101 around the rotation center 350 of the hinge members 224 and 225. A back side wall surface 705a1 on the back side of the image reading apparatus 4 shown on the left side of FIG. 11 is formed to form the depression 705 so as not to hinder the operation.

  In this embodiment, as shown in FIG. 11, the ADF 201 is opened to the image reading unit 101 to the maximum opening angle θm. At this time, the back side wall surface 705a1 of the wall surface 705a forming the recess 705 is configured to abut on the back side wall surface 704a1 of the cable guide portion 704, thereby restricting the maximum opening angle θm of the ADF 201.

  Since the operation of the ADF 201 with respect to the image reading unit 101 and the effect of the cable guide unit 704 at that time are the same as those in the first embodiment, a duplicate description is omitted.

  In the present embodiment, the cables 702 and 703 between the image reading unit 101 and the ADF 201 including the cable 703 for transmitting the control signal and the image signal of the second optical box 501 can be wired in the apparatus without increasing the number of members. It becomes.

  The hinge members 224 and 225 of the ADF 201 are generally configured as shown in the comparative example of FIG. In other words, the insertion unit 901 is inserted into a hole 801 shown in FIG. 3 provided on the exterior of the image reading unit 101, and the connection unit 902 is rotatably supported with respect to the insertion unit 901 and connected to the ADF 201. . Generally, the rotation restriction of the ADF 201 is performed by restricting the rotation angle of the connection part 902 relative to the insertion part 901.

  In order to prevent damage due to the load applied when the ADF 201 is opened, it is necessary to increase the strength by making the material of the connection part 902 metal or reinforced resin, leading to an increase in the cost of the member and the increase in the product weight. .

  In the present embodiment, the back side wall surface 705a1 on the back side of the image reading device 4 in the wall surface 705a forming the recess 705 provided on the lower surface side of the ADF 201 is in contact with the back side wall surface 704a1 of the cable guide unit 704. The maximum opening angle θm of the ADF 201 is regulated. Accordingly, it is not necessary to provide a restricting mechanism for the maximum opening angle θm of the ADF 201 on the hinge members 224 and 225 that support the ADF 201 so as to be rotatable. For this reason, the strength of the parts forming the hinge members 224 and 225 can be reduced, and the cost can be reduced.

  The type of the cable 703 that transmits the control signal and the image signal of the second optical box 501 is not limited to FFC, but is a normal cable or a thin coaxial cable that has a property that is difficult to be disconnected when repeatedly bent. A cable or the like can also be used. Other configurations are the same as those in the first embodiment, and the same effects can be obtained.

Hi ... Insertion height Hm ... Maximum lifting height
101 ... Image reading unit
201 ... ADF (Original Feeding Section)
224, 225 ... Hinge member
302… Cable
303… Cable guide
303a ... Wall surface
304… depression
304a ... Wall surface
350… rotation center
901a: Stopper section

Claims (5)

An image reading unit for reading a document image;
A document feeding unit provided so as to be rotatable with respect to the image reading unit via a hinge member, and feeding a document to the image reading unit ;
Have,
The document feeder is
A first posture in which the document feeding unit is closed with respect to the image reading unit;
The document feeding unit is rotated about the rotation center of the hinge member, and the open end of the document feeding unit opposite to the rotation center is opened with respect to the upper surface of the image reading unit. The second posture,
And a third posture in which the document feeding unit is lifted up to the upper surface of the image reading unit in the first position substantially parallel posture, it is possible to take,
The image reading unit includes a protruding cable guide unit that guides the image reading unit through a cable connected to an electrical component provided in the document feeding unit .
The cable guide part includes an image reading part wall part located closer to the open end part than the inserted cable .
The hinge member has a stopper portion that restricts upward movement of the document feeding portion with respect to the image reading portion in the third posture ,
In any state of the first posture, the second posture, and the third posture at a position where the upward movement of the image reading portion is restricted by the stopper portion, the document feeding portion. The image reading unit wall is configured not to expose the cable to the outside when viewed from the open end toward the rotation center .
The image reading device, wherein the image reading unit wall portion is not deformed when the document feeding unit changes from the first posture to the second posture . The document feeding portion is a wall portion that forms a hollow portion into which the cable guide portion is inserted, and a document feeding portion wall portion that is located closer to the open end than the inserted cable. Prepared ,
When the document feeding section is rotated to the second position from the first position, the document feeding unit wall portion and said Rukoto is configured not to interfere with the image reading section wall The image reading apparatus according to claim 1. The cable guide part includes an image reading part back side wall part positioned on a side farther from the open end part than the inserted cable .
The document feeding portion is a wall portion forming a hollow portion into which the cable guide portion is inserted, and the document feeding portion rear side wall portion located on a side farther from the open end than the inserted cable With
When the document feeding unit is rotated to the second position, the back side wall of the image reading unit and the back side wall of the document feeding unit come into contact with each other, and the maximum opening angle of the document feeding unit is regulated. The image reading apparatus according to claim 1 , wherein the image reading apparatus is an image reading apparatus. The image reading apparatus according to claim 2 , wherein the image reading unit wall is formed on an inner side of a locus when the document feeding unit wall rotates about the rotation center. . Two hinge members are provided at an interval so as to rotatably support the document feeding portion, and the cable guide portion and the recess portion are provided between the two hinge members. The image reading apparatus according to any one of claims 1 to 4 .

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