JP2005186590A - Image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming device 1 in which a flexible flat cable 40 is prevented from being twisted or disconnected in the middle section, in widely opening an upper frame 3 including a reading mechanism 33. <P>SOLUTION: The image forming device is equipped with a conveying means for feeding and discharging sheets P and a recording section for forming an image on the conveyed sheets P, in a lower frame 2. In the front surface of the lower frame 2, media slots 23 for receiving a storage medium are opened, and a main control substrate 25 including a media controlling circuit is disposed in the lower frame 2 near the media slots 23. The lower frame 2 and the upper frame 3 are axially fitted to each other in a rotatable manner with a one side rotational axis section 4 in parallel with the scanning direction of the reading mechanism 33. The reading mechanism 33 reading a document is so disposed within the upper frame 3 as to be reciprocatingly scanned. The flexible flat cable 40 connecting the reading mechanism 33 to the main control substrate 25 is wired so that its flat surface becomes substantially in parallel with the rotational axis section 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a configuration of an image forming apparatus including an image reading mechanism, a recording medium slot, and a paper feeding device.

  Conventionally, in a multi-function image forming apparatus having a color ink jet printer function, a facsimile function, and a copy function, a printer unit of an ink jet recording method is disposed in a lower frame, and a CIS (contact image sensor) or a CCD (Charge) is disposed in an upper frame. -It is known that a flatbed type scanner unit having an image reading function such as Coupled Dvice) is arranged. In the configuration disclosed in Patent Document 1, a paper feed tray that can store cut paper that is a recording medium is stored at the bottom of the lower frame so that it can be pulled out, and is disposed via a conveyance path having a lateral U-turn path. After the image is formed on the recording medium fed by the printer unit, it is discharged almost horizontally outside the apparatus. In that case, in order to facilitate paper jam processing of the recording medium to be transported and replacement of the ink cartridge accommodated in the lower frame and to improve the visibility, the structure of Patent Document 1 On the other hand, the upper frame is mounted so as to be able to open and close, and the upper frame is opened and rotated largely upward so that the upper surface of the lower frame can be opened in a wide range. In addition, the image sensor in the scanner unit is configured to scan and read a document line by line while moving in a direction perpendicular to the rotation axis of the upper frame.

  On the other hand, in Patent Document 2, a recording medium is set on a rearwardly inclined paper feed tray provided at the rear (back side) of the main body case (lower frame) of the image forming apparatus. An image is formed while conveying the recording medium substantially horizontally with respect to the printer section of the printer, and the recording medium is discharged from a discharge portion opened in front of the main body case. The ink is disposed below the discharge portion. The cartridge was arranged so that it could be inserted from the front.

  A flat bed type scanner unit (reading unit) is arranged on the upper part of the main body case, and the cover that covers the upper surface of the scanner unit and the original glass of the flat bed is arranged at the rear end so as to approach the upper surface of the paper feed tray. It was provided so as to be rotatable around the pivot. Further, the contact image sensor in the scanner portion has a shape extending in a direction orthogonal to the direction in which the pivot axis of the pivot portion extends, and the contact image sensor is supported by a base member located directly below itself. The base member is movable along an axis extending in parallel with the rotation axis.

Further, a media substrate having a media slot into which a recording medium that is an external recording medium can be inserted is disposed on the side of a paper discharge portion provided on the front surface of the main body case (lower frame).
Japanese Patent No. 3376216 (see FIGS. 1 and 5) Japanese Unexamined Patent Publication No. 2003-298790 (see FIGS. 1, 4, and 5)

  By the way, wiring for transmitting the signal from the scanner unit to the control board arranged in the lower frame (main body case) is necessary. According to the configurations of Patent Documents 1 and 2, the upper frame including the scanner unit is required. Can be opened widely with respect to the lower frame (main body case) equipped with the printer unit. In this opened state, the length of the wiring and the wiring can be reduced so that the wiring does not interfere with paper jam or maintenance work. You have to devise routing.

  In particular, as in Patent Document 2, it is normal to use a flexible flat cable having a large number of wires to connect the line-type image sensor and the control board. While it is highly flexible to bend and bend in a substantially parallel shape, it is low in the direction of bend and turn so that the longitudinal direction of the wiring intersects. Therefore, in order to prevent the presence of the flexible flat cable from being obstructed when the upper frame is wide open with respect to the lower frame, as in Patent Document 2, in the direction orthogonal to the length of the line-type image sensor. Connect one end of the flexible flat cable, extend the flexible flat cable in the direction along the moving direction of this image sensor, and in parallel with the rotation axis in the lower frame in the vicinity (downward) across the rotation axis It is preferable to connect the other end of the flexible flat cable to the control board on which the side is arranged. However, when the image sensor is moved in this way, the middle part of the flexible flat cable is twisted in the width direction as the image sensor moves, so the image forming apparatus is used for a long time and the upper frame is repeatedly opened and closed. Since the bending displacement angle of the middle part of the flexible flat cable is greatly increased and decreased, there has been a problem that an accident such as fatigue failure (breaking of the conductive wire part or disconnection) is likely to occur in the kinked part of the flexible flat cable due to repeated bending. In order to eliminate this kinking phenomenon, it is sufficient to bend the middle part of the flexible flat cable in a right angle direction and wire the flexible flat cable so that the longitudinal direction of the flexible flat cable extends in a direction perpendicular to the rotation axis. In this case, as the image sensor moves, a repeated bending action greatly acts on the bent portion, and even in this case, the problem that a disconnection accident at the folded portion cannot be avoided cannot be solved.

  In addition, if the media substrate is disposed on the front surface of the lower frame and the main control substrate is disposed at another location, there is a problem that wiring for connecting the two substrates is required.

  The present invention has been made to solve these conventional problems. When the upper frame provided with the reading mechanism is largely opened, the middle portion of the flexible flat cable is not obstructed, and the flexible flat cable is It is a first object of the present invention to provide an image forming apparatus in which a midway portion is not twisted and maintenance and ink cartridge replacement can be easily performed.

  A second object is to provide an image forming apparatus that can easily handle paper jams.

  In order to achieve the above object, an image forming apparatus according to a first aspect of the present invention includes a conveying unit that supplies and discharges a recording medium in a lower frame, and a recording medium that is conveyed by the conveying unit. On the other hand, a recording unit for forming an image and a control board are provided, and a reading mechanism for reading a document is arranged in a reciprocating manner in an upper frame provided so as to rotate and open with respect to the lower frame. In the image forming apparatus, a media slot for receiving a storage medium is opened in front of the lower frame, and the lower frame and the upper frame can be rotated on one side perpendicular to the moving direction of the reading mechanism. The control board includes a connector to which the storage medium is connected through the media slot, and is in the vicinity of the media slot, The rotation axis with the unit frame and one side of the control board are arranged in parallel, the scanning direction of the photoelectric conversion element in the reading mechanism, the rotation axis between the lower frame and the upper frame, The one side of the control board is configured to be parallel to each other.

  According to a second aspect of the present invention, in the image forming apparatus according to the first aspect, the flexible flat cable connected to the reading mechanism has a position in which the flat surface substantially faces the rotation axis, and the outer periphery thereof. And connected to one side of the control board.

  According to a third aspect of the present invention, in the image forming apparatus according to the first or second aspect, the mounting surface of the component or the back surface of the control board is substantially parallel to the side wall surface of the lower frame on the rotation axis side. It is arranged so that.

  According to a fourth aspect of the present invention, in the image forming apparatus according to the first or second aspect, the mounting surface of the component or the back surface of the control board is substantially parallel to the scanning surface of the reading mechanism. Are arranged.

  According to a fifth aspect of the present invention, in the image forming apparatus according to any one of the first to fourth aspects, the standby position of the reading mechanism in the upper frame is a side portion of the upper frame that is close to the rotation axis. Is set to be.

  According to a sixth aspect of the present invention, in the image forming apparatus according to any one of the first to fifth aspects, an ink cartridge is disposed in the recording portion and is detachably mounted on the lower frame. The accommodating portion is disposed on the side portion that is farthest from the rotation axis.

  According to a seventh aspect of the present invention, in the image forming apparatus according to any one of the first to sixth aspects, a holding means for holding the upper frame in a predetermined opening posture is provided between the lower frame and the lower frame. It is arranged.

  According to an eighth aspect of the present invention, in the image forming apparatus according to the seventh aspect, the side portion farthest from the rotation axis in the upper frame held in the predetermined opening position, and the lower frame The distance in the front view with the side part farthest from the rotation axis is set to be equal to or larger than the width dimension of the ink cartridge.

  According to a ninth aspect of the present invention, in the image forming apparatus according to any one of the first to eighth aspects of the present invention, the image forming apparatus further includes a storage portion for depositing a recording medium on a bottom portion of the lower frame, and has a U-shape that extends laterally from the storage portion. The recording medium is transported to the recording unit via the transport path, and the back cover body for opening one of the laterally U-shaped transport paths is detachable.

  According to a tenth aspect of the present invention, in the image forming apparatus according to the ninth aspect, a replaceable part is mounted on the back cover body.

  According to an eleventh aspect of the present invention, in the image forming apparatus according to the tenth aspect, the replaceable component is a power supply board.

  According to a twelfth aspect of the present invention, in the image forming apparatus according to the tenth aspect, the replaceable part is a waste ink collecting member.

  According to a thirteenth aspect of the present invention, in the image forming apparatus according to any one of the tenth to twelfth aspects, the replaceable part is disposed inside the back cover body, and the lateral U-shaped transport path is arranged. The replaceable part is covered with an inner cover forming one side.

  According to a fourteenth aspect of the present invention, in the image forming apparatus according to any one of the ninth to thirteenth aspects, a separating means for separating the recording medium from the housing portion is provided inside the back cover body. It is provided.

  As described above, according to the first aspect of the present invention, the scanning direction of the photoelectric conversion element in the one side of the control board and the reading mechanism and the rotation axes of the lower frame and the upper frame are parallel and face each other. Because of this arrangement relationship, the wiring between the reading mechanism and the control board with the rotation axis interposed therebetween can be connected with the shortest distance. And if the circuit for driving (controlling) the storage media is integrated in the control board, the labor and installation man-hours for wiring can be greatly reduced compared to the case where it is formed on separate boards. In addition, the space for placing the substrate can be reduced, and the image forming apparatus can be made compact.

  According to the second aspect of the present invention, the flexible flat cable is attached to the reading mechanism at one side parallel to the rotation axis and along the scanning direction of the photoelectric conversion element, and connected to the control board. By connecting the flexible flat cable to one side parallel to the rotation axis, the flat flexible flat cable can be connected without being bent between the reading mechanism and the control with the rotation axis interposed therebetween. can do.

  According to invention of Claim 3 or 4, the internal space (vacant space) of the lower frame near the location of a rotation axis can be used effectively as an arrangement location of the control board. Furthermore, if the circuit for driving (controlling) the storage media is integrated on the control board, the labor and installation man-hours for wiring can be greatly reduced compared to the case where it is formed on a separate board, thereby reducing costs. In addition, the space for arranging the substrates can be reduced, and the image forming apparatus can be made compact.

  According to the fifth aspect of the present invention, by setting the standby position of the heavy reading mechanism to the side close to the rotation axis, the upper frame can be opened with a small force and the operation becomes easy.

  According to the sixth aspect of the present invention, since the ink cartridge housing portion is provided on the side of the upper frame that has a larger opening space with respect to the lower frame, the ink cartridge can be easily attached and detached. According to the seventh and eighth aspects of the invention, the replacement work for taking out or mounting the ink cartridge vertically becomes easier.

  According to the ninth aspect of the present invention, it is extremely easy to remove the back cover body when a paper jam occurs in the conveyance path that makes a U-turn upward near the back side from the paper feeding unit at the bottom of the image forming apparatus. Paper jam can be processed.

  According to the tenth to twelfth aspects of the present invention, the replaceable parts such as the power supply board and the waste ink collecting member are accommodated in the back cover body, so that the replacement and maintenance work can be facilitated.

  According to the thirteenth aspect of the invention, since the accommodating part of the replaceable part is covered with the inner cover, dust or the like of the recording medium does not enter these parts. In addition, since the replaceable part is not exposed when the back cover body is removed for replacement, the replacement work can be performed safely.

  According to the fourteenth aspect of the present invention, the maintenance work of the separating means is also facilitated.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a multifunctional image forming apparatus 1 according to an embodiment of the present invention, FIG. 2 is a partial side sectional view showing a structure in a lower frame 2 of the image forming apparatus 1, and FIG. FIG. 4 is a front view of the image forming apparatus 1 showing a state in which the upper frame 3 is opened widely, and FIG. 5 shows a state in which the upper frame 3 is opened widely. 6 is a perspective view of the image forming apparatus 1 according to the second embodiment. FIG. 6 is a perspective view of the image forming apparatus 1 according to the third embodiment showing a state in which the upper frame 3 is largely opened. FIGS. It is principal part sectional drawing which shows the structure of this.

  A multifunction image forming apparatus 1 shown in FIG. 1 has a facsimile function, a printer function, a copying function, a scanner function, and the like. The multifunctional image forming apparatus 1 includes a substantially box-shaped lower frame 2 having an open top surface, and a hinge, a hinge, and the like that rotate with respect to one side (left side in the embodiment of FIG. 1) of the lower frame 2. And an upper frame 3 pivotally attached via an axis part 4 so as to be rotatable up and down.

  As shown in FIG. 2, a sheet feeding cassette 5 for placing a plurality of sheets of recording media P as a recording medium in a stacked state is disposed at the bottom of the lower frame 2 in the center in the left-right direction. The cassette 5 is configured to be movable with respect to the front surface of the lower frame 2.

  Further, in the lower frame 2, a paper feed unit 6 having a paper feed roller 7 above the paper feed cassette 5 and a U-shaped U-turn conveyance path 9 that is laterally U-shaped at the rear end of the lower frame 2 are provided. And an inkjet printer head that forms an image by ejecting ink onto the surface of the sheet P on the flat platen 11 disposed in the conveyance path 10. 12 recording units 8 are arranged. A case of the paper feed unit 6 is rotatably attached to a drive shaft 13 that rotates via a drive motor and a transmission gear mechanism (not shown), and a paper feed roller 7 is connected via a gear mechanism 14 in the paper feed unit 6. In FIG. 2, the uppermost sheet P is separated from the sheet P which is rotated counterclockwise and accumulated on the bank-like separating plate portion (separating means) 15 having a large friction coefficient, and is conveyed in a U-turn. The sheet P is fed between a pair of a conveying roller 16 arranged and driven in the path 9 and a conveying roller 17 that freely rotates. The back cover body 19 that covers the back side of the lower frame 2 is configured to be insertable / removable from the back surface of the lower frame 2 so that one side of the U-turn conveyance path 9 can be opened, as will be described in detail later. The width dimension of the back cover body 19 may be equal to or shorter than the width dimension on the back side of the lower frame 2.

  In the conveyance path 10, a registration roller pair 20 and a discharge roller pair 21 composed of a discharge roller and a spur driven on the downstream side are provided on the upstream side of the platen 11. After a predetermined image is recorded on the upper surface of P, the image is discharged to a paper discharge unit 22 that opens in front of the lower sheet 2 and above the paper feed cassette 5.

  Further, on the left side (left side of the opening of the paper discharge unit 22) of the front plate 2a of the lower frame 2 which is the front of the image forming apparatus 1, smart media as an external storage medium capable of storing data such as images. (Registered trademark), CompactFlash (registered trademark), and Memory Stick (registered trademark), for example, an SD card, an XD card, or the like can be inserted / removed in the vertical direction, and a connector 24 is provided. A main control board 25 is erected in the vicinity of the inner surface of the side plate 2b of the lower frame 2 having the rotation axis portion 4 so as to be substantially parallel to the side plate 2b (see FIGS. 1 and 4).

  An ink cartridge 26 for supplying ink to the color recording printer head 12 is in the lower frame 2 and is located on the inner surface of the side plate 2c that is farthest away from the side plate 2b having the rotation axis 4. It is comprised so that attachment or detachment is possible from the upper direction with respect to the accommodating part 27 (refer FIG. 3) of the position which approached. The ink cartridge 26 stores ink for each of a plurality of colors. In the embodiment, the ink cartridge 26 has four colors of black, cyan, magenta, and yellow. However, inks of more colors may be stored. Ink is supplied from each ink cartridge 26 to the printer head 12 by connecting a flexible ink tube (not shown).

  An operation panel 30 is disposed in front of the upper surface of the upper frame 3. The operation panel 30 is provided with various buttons such as numeric buttons “0” to “9”, a start button, and a function operation button, and various operations are performed by pressing these buttons. The operation panel 30 is provided with a display unit 31 such as a liquid crystal (LCD), and displays the setting state of the image forming apparatus 1 and various operation messages as necessary.

  An image reading mechanism 33 is disposed on the upper frame 3 on the rear side of the operation panel 30. That is, the image reading mechanism 33 for reading a facsimile original to be transmitted to the counterpart facsimile apparatus during the facsimile function and an image of the original to be copied during the copying function is a flat bed reading section that reads an image of the original on a large glass plate. And an image of a document sent by an automatic document feeding unit 37 disposed on one side of a rotatable cover body 36 that covers the upper surface of the flat bed reading unit (a side close to a rotation axis unit 4 described later). And an automatic reading unit.

  Directly below the glass plate in the flat bed reading unit, a line-type contact image sensor (CIS: Contact Image Sensor) 38 as an example of a photoelectric conversion element for reading an image surface of a document brought into contact with the glass plate. Is mounted so as to be able to reciprocate in a direction toward and away from the rotation axis 4. That is, the moving direction of the image sensor 38 is configured to be perpendicular to the rotation axis of the rotation axis 4. The frame 38a and the contact image sensor 38 extend long in the direction orthogonal to the moving direction. In the image sensor 38, a plurality of photoelectric conversion elements are arranged in the longitudinal direction of the frame 38a, that is, in the direction along the rotation axis of the rotation axis 4 of the upper frame 3 and the lower frame 2. In the present invention, the scanning direction of the photoelectric conversion element indicates a direction parallel to the rotation axis of the rotation axis 4. The frame 38a can be reciprocated in the moving direction by a drive motor and a timing belt. Although not shown in the drawing, a small first glass plate with which the image surface of the document supplied by the automatic document feeder abuts and a second glass plate with a large area with which the image surface of a flat stationary document abuts are the document. The back surfaces of the glass plates are connected to each other by a separation guide rail that is arranged in parallel in a direction orthogonal to the feeding direction (the moving direction) of the paper and extends in the parallel direction. The first glass plate is disposed on the side close to the rotation axis part 4 and in the state where the image is read by the automatic reading part and the state where the contact image sensor 38 is set at the standby position by the flat bed reading part, The contact image sensor 38 is stationary immediately below one glass plate.

  A paper discharge unit 39 is formed on the upper surface of the cover body 36 for discharging and placing a document that has been supplied by the automatic document feeder and finished reading. The cover body 36 may be configured to be openable and closable via a hinge about the back side of the image forming apparatus 1, or via an hinge about an axis parallel to the rotational axis 4. You may comprise so that opening and closing rotation is possible.

  The flexible flat cable 40 for electrically connecting the main control board 25 in the lower frame 2 and the image sensor 38 in the upper frame 3 has its flat surface (wide surface) rotated by the rotation axis part 4. The flexible flat cable 40 is disposed so as to be opposed to the movement axis, and the longitudinal direction of the flexible flat cable 40 extends in a direction perpendicular to the rotation axis by the rotation axis 4 (a direction parallel to the moving direction of the image sensor 38). One end of the flexible flat cable 40 is connected to the middle part in the longitudinal direction of the image sensor 38 (one side along the scanning direction of the photoelectric conversion element), and the other end is connected to the upper end part of the main control board 25 ( It is connected to the rotation axis part 4 (one side parallel to the rotation axis) (see FIGS. 1, 3 and 4). In this case, the both end connecting portions of the flexible flat cable 40 are also arranged so that their flat surfaces (wide surfaces) are parallel to the rotation axis of the rotation axis 4.

  When the flexible flat cable 40 is connected in this way, the middle portion in the longitudinal direction of the flexible flat cable 40 is either in the posture in which the upper frame 3 is closed with respect to the lower frame 2 or in the posture in which the flexible frame is wide open. The flat surface (wide surface) exhibits a large curved surface in a state where it is not twisted in the vicinity of the rotation axis portion 4. Even when the image sensor 38 is at the standby position, that is, at a position close to the rotation axis portion 4, the flat portion (wide surface) of the midway portion in the longitudinal direction of the flexible flat cable 40 is not twisted. Therefore, even if the image forming apparatus 1 is used for a long period of time and the opening / closing rotation of the upper frame 3 is repeated, the bending displacement angle of the middle portion of the flexible flat cable 40 is small, so the flexible flat cable 40 by repeated bending is small. The accident of fatigue failure (breaking of the conducting wire) does not occur.

  In order to maintain a posture in which the upper frame 3 is opened at a large depression angle θ with respect to the lower frame 2, as shown in FIGS. 3 and 4, one side of the lower surface side of the upper frame 3 (the image forming apparatus 1). A guide rail 42 having a guide groove hole 43 is fixed to a portion close to the back side of the image sensor 38 so as to be parallel to the moving direction of the image sensor 38 and extend in that direction. A guide pin 45 at the distal end (upper end) of a support bar 44 pivotally attached to the base end so as to be pivotable on the side far from 4 is inserted into the guide groove 43 so as to be movable. Then, with the guide pin 45 fitted in the engaging portion (not shown) formed in the guide groove hole 43 that is notched upward on the side far from the rotation axis portion 4, the upper frame 3 is The frame 2 is configured to be held at a predetermined large opening angle. This open posture holding means has a configuration such as an arcuate guide rail arranged on the side close to the rotation axis portion 4 and a guide pin guided by it, and in addition to this, the upper frame 3 is held to hold the open state. An urging means for urging upward may be provided.

  With the above configuration, the upper surface of the lower frame 2 can be opened in a large range, maintenance of the printer head 12, etc., removal of a paper jam in the transport path 10, and replacement work of the ink cartridge 26 can be facilitated, and visibility is improved. Will also improve. In particular, as shown in FIG. 4, the side end of the upper frame 3 far from the rotation axis portion 4 (the farthest away side) in the upper frame 3 that has been pivoted largely upward and held in the lower frame 2 is used. If the distance A in the front view from the side end portion farthest from the moving axis 4 is set to be equal to or larger than the width B when the ink cartridge 26 is attached or detached, the ink cartridge 26 is set. Thus, the ink cartridge 26 can be attached and detached easily and the visibility can be improved.

  In the embodiment shown in FIG. 5, the media slot 23 is opened laterally with respect to the front plate 2 a of the lower frame 2, and the main control board 25 having the connectors 24 is provided on the side plate having the rotation axis portion 4. In the vicinity of the inner surface of 2b, it is arranged in a substantially horizontal shape in the lower frame 2, and the longitudinal direction of the main control board 25 is arranged along the left-right direction of the front plate 2a. In the embodiment shown in FIG. 6, the media slot 23 is opened in the laterally long direction with respect to the front plate 2 a of the lower frame 2, and the main control board 25 provided with the connectors 24 is connected to the rotation axis portion 4. In the vicinity of the inner surface of the side plate 2b having an inner surface, it is arranged in a substantially horizontal manner in the lower frame 2, and is arranged so that the longitudinal direction of the main control board 25 is along the front-rear direction of the side plate 2b. is there. The power supply board 46 is vertically placed in the vicinity of the inner surface of the side plate 2b so as to be substantially parallel to the side plate 2b. 5 and 6 are the same as those in the first embodiment, and thus the same reference numerals are used and description thereof is omitted. However, the operations and effects are almost the same as those in the first embodiment.

  In any of the embodiments shown in FIGS. 1, 5 and 6, the main control board 25 including the control circuit for the storage medium is arranged at a position close to the position of the rotation axis portion 4 between the lower frame 2 and the upper frame 3. As described above, the flexible flat cable 40 is bent in the vicinity of the inside of the rotation axis portion 4 without twisting the wide surface as described above. The part can be prevented from being subjected to an excessive bending action.

  Further, the internal space (empty space) of the lower frame 2 close to the location of the rotation axis portion 4 can be effectively used as an arrangement location of the main control board 25. Further, if a circuit for driving (controlling) the storage medium is integrally incorporated in the main control board 25, the labor and installation man-hours for wiring are greatly reduced as compared with the case where they are formed on separate boards, thereby reducing costs. In addition, the space for arranging the substrates can be reduced, and the image forming apparatus 1 can be made compact. The location of the rotation axis portion 4 may be set on the right side of the image forming apparatus 1.

  Next, a configuration for facilitating paper jam processing will be described with reference to FIGS. 2 and 7 to 10. The back cover body 19 is fitted between the bottom plate 2 d of the lower frame 2 and is transported. The state in which the roller 16 and the conveyance roller 17 are pressed with an appropriate pressing force can be maintained. And if necessary, one side of the U-turn conveyance path 9 can be opened by extracting the back cover body 19 from the back surface of the lower frame 2 in a substantially horizontal direction. In that case, if the conveying roller 17 that rotates freely inside the back cover body 19 is pivotally mounted (see FIGS. 7, 9, and 10), the gap between the driving conveying roller 16 and the conveying roller 17 is largely opened. The jammed paper P can be removed very easily.

  As shown in FIGS. 7 to 10, if a separating plate portion 15 having a large friction coefficient as a sheet separating means is mounted inside the back cover body 19, it is separated from the sheet feeding roller 7 in the sheet feeding unit 6. The paper jam generated between the plate portions 15 can be easily treated, and the cleaning operation of the surface 15a of the separation plate portion 15 and the replacement operation of the separation plate portion 15 are extremely easy.

  As shown in FIG. 8, if the conveying roller 16 and the conveying roller 17 remain in the lower frame 2 in a state where the back cover body 19 is removed, the pivotal support portion of the conveying roller 17 becomes unnecessary. The configuration of the back cover body 19 becomes extremely simple.

  As shown in FIG. 9, the power supply board 46 can be disposed in the back cover body 19. Thereby, the space in the back cover body 19 can be used effectively. An inner cover 47 that covers the surface of the power supply substrate 46 may be detachably disposed in the back cover body 19. The inner cover 47 may be formed in a curved shape so as to form one side of the U-turn conveyance path 9.

  As shown in FIG. 10, a porous fiber mat that can absorb and store waste ink or an accumulation member 48 such as an accumulation tank is disposed in the back cover body 19 and the ink in the printer head 12 is periodically discharged. It is also possible to provide an attachment hole 50 for detachably attaching the tip of the waste ink tube 49 that is discharged and connected to a maintenance unit (not shown) such as a nozzle recovery process. As a result, the space in the back cover body 19 can be used effectively, and the replacement work of the accumulating member 48 can be performed extremely easily.

  The separation plate portion 15, the power supply board 46, and the integrated member 48 are examples of replaceable parts in the claims, and replacement of these replaceable parts can be easily performed.

1 is a perspective view of an image forming apparatus 1 according to a first embodiment. FIG. 3 is a side sectional view of the central portion in the lower frame 2 as viewed from the right side of the image forming apparatus 1. It is a perspective view of the state where the upper frame 3 is opened. It is a front view in the state where upper frame 3 was opened. FIG. 6 is a perspective view of an image forming apparatus 1 according to a second embodiment showing a state where an upper frame 3 is largely opened. FIG. 6 is a perspective view of an image forming apparatus 1 according to a third embodiment showing a state in which an upper frame 3 is widely opened. It is a side view of the state where the back cover body 19 was separated. It is a side view of other embodiments in the state where back cover body 19 was separated. It is a side view of other embodiment of the state which isolate | separated the back cover body 19. FIG. It is a side view of other embodiment of the state which isolate | separated the back cover body 19. FIG.

Explanation of symbols

P sheet 1 image forming apparatus 2 lower frame 3 upper frame 4 rotation axis part 5 sheet feeding cassette 6 sheet feeding unit 8 recording unit 9 U-turn conveying path 12 printer head 16 conveying roller 17 conveying roller 19 back cover body 21 sheet feeding roller 22 Paper Feed Unit 23 Media Slot 24 Connector 25 Main Control Board 26 Ink Cartridge 27 Storage Unit 33 Image Reading Mechanism 36 Cover Body 38 Image Sensor 40 Flexible Flat Cable 42 Guide Rail 44 Support Rod 46 Power Supply Board 47 Inner Cover 48 Integrated Member 49 Discard Ink tube

Claims (14)

The lower frame includes a conveying unit that supplies and discharges a recording medium in the lower frame, a recording unit for forming an image on the recording medium conveyed by the conveying unit, and a control board. In an image forming apparatus in which a reading mechanism for reading a document is disposed so as to be able to reciprocate in an upper frame provided so as to pivot open and close with respect to
A media slot for receiving a storage medium is opened on the front of the lower frame,
The lower frame and the upper frame are pivotally attached to one side perpendicular to the moving direction of the reading mechanism,
The control board includes a connector to which the storage medium is connected through the media slot, and in the vicinity of the media slot, the rotation axis of the lower frame and the upper frame is parallel to one side of the control board. Arranged to be
An image characterized in that the scanning direction of the photoelectric conversion element in the reading mechanism, the rotational axis of the lower frame and the upper frame, and one side of the control board are parallel to each other. Forming equipment.   The flexible flat cable connected to the reading mechanism is wired along the outer periphery of the flexible flat cable so that its flat surface is substantially opposite to the rotation axis, and is connected to one side of the control board. The image forming apparatus according to claim 1.   The image according to claim 1, wherein the control board is arranged such that a mounting surface of the component or a back surface thereof is substantially parallel to a side wall surface of the lower frame on the rotation axis side. Forming equipment.   The image forming apparatus according to claim 1, wherein the control board is disposed such that a mounting surface of the component or a back surface thereof is substantially parallel to a scanning surface of the reading mechanism.   5. The image forming apparatus according to claim 1, wherein a standby position of the reading mechanism in the upper frame is set to be one side portion of the upper frame close to the rotation axis. . An ink jet recording head is disposed in the recording unit,
6. The image according to claim 1, wherein a storage portion of an ink cartridge that is detachably attached to the lower frame is disposed on a side portion that is farthest from the rotation axis. Forming equipment.   The image forming apparatus according to claim 1, wherein holding means for holding the upper frame in a predetermined opening posture is arranged between the lower frame and the lower frame.   The distance in the front view between the side portion farthest from the rotation axis in the upper frame held in the predetermined opening posture and the side portion farthest from the rotation axis in the lower frame is the front of the ink cartridge. The image forming apparatus according to claim 7, wherein the image forming apparatus is set to have a dimension equal to or greater than a width dimension. A storage portion for depositing a recording medium at the bottom of the lower frame;
A recording medium is transported from the storage unit to the recording unit via a lateral U-shaped transport path,
The image forming apparatus according to claim 1, wherein a back cover body for opening one of the laterally U-shaped conveyance paths is detachable.   The image forming apparatus according to claim 9, wherein a replaceable part is mounted on the back cover body.   The image forming apparatus according to claim 10, wherein the replaceable part is a power supply board.   The image forming apparatus according to claim 10, wherein the replaceable part is a waste ink accumulating member.   The replaceable part is arranged inside the back cover body, and the replaceable part is covered with an inner cover that forms one of the laterally U-shaped transport paths. The image forming apparatus according to any one of 10 to 12.   14. The image forming apparatus according to claim 9, further comprising a separating unit configured to separate a recording medium from the housing portion inside the back cover body.

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