JP4419792B2 - Medium feeding device - Google Patents

Description

  The present invention relates to a medium feeding device that feeds a medium, a recording device including the medium feeding device, and a liquid ejecting apparatus.

  Some sheet feeding apparatuses, which are one of medium feeding apparatuses, can feed sheets from a plurality of sheet feeding systems via a sheet feeding path. In such a sheet supply apparatus, a roller is disposed in each sheet supply system, a guide member is disposed along each sheet supply path, and a pair of rollers is disposed at a junction of each sheet supply path. ing. Each guide member has a rotatable configuration in which the merging point side is a free end and the other end side is axially supported.

Japanese Patent Application Laid-Open No. 5-294518

  The conventional sheet supply apparatus described above requires time and effort to finely adjust all the guide members in order to allow the sheets to pass smoothly through the respective sheet supply paths. Further, since the sheet is sent to each sheet supply path only by the rollers provided in each sheet supply system, a feeding error is likely to occur in the middle of each sheet supply path.

  The present invention has been made in view of the various problems as described above, and an object of the present invention is to provide a simple guide member that guides the feeding of the medium, so that the medium can be fed smoothly. It is an object of the present invention to provide a medium feeding device, a recording apparatus including the medium feeding device, and a liquid ejecting apparatus.

  To achieve the above object, in the medium feeding device of the present invention, a first supply unit that supplies a foldable medium from the front side of the device, a second supply unit that supplies the medium from the back side of the device, A medium feeding device comprising a third feeding unit that feeds a medium or a medium that cannot be bent from the front side of the apparatus or the rear side of the apparatus, wherein the feeding is performed at a confluence of the medium feeding path of each of the feeding units. One guide member that moves and guides corresponding to each medium is provided. Accordingly, by finely adjusting only one guide member, the medium can smoothly pass through the medium feeding paths of the three supply units, and therefore the adjustment processing time can be shortened.

  Further, the guide member is movable by its own weight or a feeding force of the medium. Thereby, since the drive source of a guide member becomes unnecessary, cost can be held down low. Further, the guide member includes a first roller and a second roller that feeds the medium while sandwiching the medium. As a result, it is possible to prevent a feeding error from occurring in the medium feeding path. In the guide member, a plurality of guide ribs for causing the medium fed by the first supply unit to run along the first roller extend in the direction of the junction at a predetermined interval with respect to the guide body. The guide ribs located on both sides of the second roller are formed in a shape close to the first roller. Thus, the medium can be undulated between the guide ribs and reliably brought into contact with the first roller, so that the medium can be fed more reliably.

  Further, the guide member is characterized in that the medium to be fed is brought close to the first roller by increasing the own weight between the guide ribs located on both sides of the second roller. Thereby, since the force which presses a guide rib to a medium increases, a medium can be reliably made to contact with a 1st roller. In addition, the guide ribs located on both sides of the second roller are formed in a shape covering the second roller to increase its own weight. Thereby, the increase of the dead weight between guide ribs can be performed easily.

  In order to achieve the above object, the recording apparatus of the present invention is a recording apparatus for recording on a medium, and includes the medium feeding apparatus. The liquid ejecting apparatus of the present invention is a liquid ejecting apparatus that ejects liquid onto a medium to be ejected, and includes the medium feeding device. Thereby, it is possible to provide a recording apparatus and a liquid ejecting apparatus that exhibit the above-described effects.

  FIG. 1 is a perspective view showing the entire external configuration of an inkjet type multifunction peripheral that is one of recording apparatuses according to an embodiment of the present invention, FIG. 2 is a perspective view showing the internal structure, and FIG. It is the schematic side view. The ink jet type multifunction peripheral 100 has a printer function capable of recording on, for example, a JIS standard L size, A6 size to A4 size cut sheet or postcard, a JIS standard size A4 size original, Equipped with a scanner function that can read originals up to US standard letter size, and a copy function that can copy to JIS standard L size, 2L size, B5 size, A4 size, six cuts, postcard size paper ing.

  As shown in FIG. 1, the inkjet multifunction peripheral 100 is entirely covered with a substantially rectangular parallelepiped housing 101, a printer 110 is disposed in the lower stage, and a scanner 120 is disposed in the upper stage. ing. And three paper feed sections including the characteristic part of the present invention are arranged. That is, a paper feed unit (first supply unit) 130 is disposed on the back side, a paper supply / discharge unit (second supply unit) 140 is disposed on the front side, and a paper supply / discharge unit 140 on the front side. A paper feed / discharge unit (third supply unit) 240 is disposed on the top. The user can select one or all of the rear-side paper feeding unit 130 and the front-side paper feeding / discharging units 140 and 240 as the setting direction of the paper before recording. Can increase the degree of freedom. Furthermore, since the recorded paper is always discharged from the paper supply / discharge sections 140 and 240 on the front side, the user can easily take out the paper.

  A rectangular flat plate-shaped scanner cover 102 shown in FIG. 1 is disposed on the upper surface of the housing 101. The scanner cover 102 has a handle 103 formed at the front, and is attached so as to be rotatable in the direction of the arrow a in the figure around a rotation axis at the rear. When using the scanner 120, the user can open and close the scanner cover 102 by inserting a finger into the handle 103, so that the user can easily put in and out the document.

  On both sides of the front surface of the housing 101, cartridge housing portions 104 into which the plurality of ink cartridges 10 shown in FIG. Each ink cartridge 10 stores ink of each color for recording. Each cartridge storage section 104 is covered with a transparent or translucent cartridge cover 105 shown in FIG. The cartridge cover 105 is attached so as to be rotatable in the direction of the arrow b shown in the figure around a rotation shaft at the lower part thereof. Even if the user does not lift the entire heavy scanner 120 and open the inside of the printer 110 as in the prior art, the ink cartridge can be released by simply pressing the cartridge cover 105 to release the locking portion and opening the cartridge storage portion 104. Since 10 replacement operations and the like can be performed, work efficiency can be improved.

  As shown in FIG. 1, an operation unit 106 for instructing each operation of the printer 110, the scanner 120, and the copy is disposed in front of the scanner cover 102 on the upper surface of the housing 101. The operation unit 106 includes a power system for turning on / off the power, an operation system for operating the cueing of paper, operating an ink flushing, a processing system for performing image processing, etc. A liquid crystal panel 107 and the like for displaying are provided. The user can operate buttons and the like while looking at the liquid crystal panel 107 for confirmation.

  As shown in FIGS. 2 and 3, the paper feed unit 130, the paper supply / discharge unit 140, the paper supply / discharge unit 240, the recording unit 150, and the like are disposed in the housing 101. As shown in FIG. 3, a flap (guide member), which is a characteristic part of the present invention, is formed at the junction of the paper feed paths of the paper feed unit 130, the paper feed / discharge unit 140, and the paper feed / discharge unit 240. 200 is arranged. The flap 200 has a function of guiding each sheet fed from the sheet feeding unit 130, the sheet feeding / discharging unit 140 or the sheet feeding / dispensing unit 240 with high accuracy to increase the accuracy of recording and discharging. Will be described later.

  As shown in FIG. 1, the paper feed unit 130 is formed with a rear paper feed port 131 that opens upward in a rectangular shape, and a frame 132 is formed along both edges and the rear edge of the rear paper feed port 131. It is arranged. As shown in FIGS. 1 to 3, the frame 132 automatically includes a paper support 133 that supports one or more sheets to be fed and a sheet supported by the paper support 133 one by one. A rear sheet feeding mechanism (hereinafter referred to as a rear ASF) 134 for feeding the sheet is disposed.

  FIG. 4 is a side view showing details of the paper support 133 and the rear ASF 134, which will be described with reference to FIGS. The paper support 133 includes a first support 21 and a second support 22 that support the back side of the paper, a fixed edge guide 23 that guides both side edges of the paper, a movable edge guide 24, and the like. The rear ASF 134 is a hopper 31 that lifts the paper supported by the paper support 133, a paper feed roller 32 that picks up the paper lifted by the hopper 31, and a paper that is multi-fed by the paper feed roller 32. A retard roller 33 that separates only one sheet, a rear sheet return unit 34 that returns the remaining sheets separated by the retard roller 33 to the hopper 31, and the like are provided.

  The first support 21 is formed in a flat plate shape and is disposed inside the rear wall of the frame 132 so as to be retractable and retractable. The second support 22 is formed in a flat plate shape so that the first support 21 can be stored and pulled out. It is arranged. Since the first support 21 and the second support 22 are formed to be extendable in the paper feeding direction, they can be stored compactly when not in use, and various sizes of paper can be stored when in use. Can support reliably.

  The fixed edge guide 23 is formed integrally with the hopper 31 in a shape along the right side wall when viewed from the front side of the frame 132, and the movable edge guide 24 is formed along the left side wall when viewed from the front side of the frame 132. And is attached to the hopper 31 so as to be movable between the left side wall and the right side wall of the frame 132 substantially parallel to the rear wall of the frame 132. Since the fixed edge guide 23 and the movable edge guide 24 can reliably guide both side edges of the paper even if the paper sizes are different, the feeding can be performed with high accuracy.

  The hopper 31 is formed in a flat plate shape on which paper can be placed, and is disposed substantially parallel to the rear wall of the frame 132. The lower end is positioned near the paper feed roller 32, and the upper end is the rear wall of the frame 132. It arrange | positions so that it may be located close to the top part. The hopper 31 is provided with the other end of a compression spring (not shown) having one end attached to the rear wall of the frame 132 on the back surface on the lower end side, and the lower end side pivots about the upper end side by expansion and contraction of the compression spring. It is arranged like this.

  The paper feed roller 32 is formed in a D-shape with a part of the cross-section cut away, and is disposed near the lower end of the hopper 31. The paper feed roller 32 rotates intermittently and frictionally feeds the paper lifted by the hopper 31. It is supposed to send. The retard roller 33 is disposed so as to be in contact with the paper feed roller 32, and when the paper is fed by the paper feed roller 32, only the uppermost paper is frictionally separated from the lower paper. Yes. The rear paper return unit 34 is formed in the shape of a claw and is disposed in the vicinity of the paper feed roller 32. The lower paper separated by the retard roller 33 is placed on the claw and returned to the hopper 31. .

  As shown in FIGS. 2 and 3, the paper supply / discharge unit 140 is formed with a front paper supply / discharge port 141 that opens in a rectangular shape toward the front, and paper is supplied below the front paper supply / discharge port 141. A tray 142 is disposed, and a paper discharge tray 143 is disposed above the paper feed tray 142. As shown in FIG. 3, a front sheet feeding mechanism (hereinafter referred to as a front ASF) that automatically feeds the sheets stored in the sheet feeding tray 142 one by one is provided at the side of the front feeding / discharging port 141. ) 144 and a front discharge mechanism (hereinafter referred to as a front EJ) 145 that automatically discharges the sheet to the discharge tray 143.

  As shown in FIGS. 2 and 3, the paper feed tray 142 is formed in a flat plate shape, and the paper to be fed before recording is stacked and stored on the upper surface. As shown in FIGS. 2 and 3, the paper discharge tray 143 includes a first tray 143a, a second tray 143b, and a third tray 143c. The first tray 143a is formed in a flat plate shape, and the rear part is rotatably disposed on the main body frame 108 of the paper feed / discharge unit 140, and the second tray 143b is formed in a flat plate shape and the first tray 143a. The third tray 143c is formed in a flat plate shape so as to be retractable and retractable on the second tray 143b.

  The paper discharge tray 143 is configured such that the paper to be discharged after recording is stacked and placed on the upper surface with the second tray 143b and the third tray 143c pulled out. Since the second tray 143b and the third tray 143c are formed to be extendable in the paper discharge direction, they can be stored compactly when not in use, and various sizes of paper can be discharged when in use. The stacked sheets can be surely stacked and placed.

  FIG. 5 is a side view showing details of the front ASF 144, which will be described with reference to FIGS. The front ASF 144 includes a pickup roller unit 41 that takes out the paper stored in the paper feed tray 142, and a bank portion 42 that changes the direction of the paper taken out by the pickup roller unit 41. Further, a retard roller unit 43 that separates the sheets fed by the pickup roller unit 41 into only one sheet, a front sheet return unit 44 that returns the remaining sheets separated by the retard roller unit 43 to the sheet feed tray 142, An intermediate roller 45, an assist roller 46, and the like that reverse the sheet to be fed into a U shape are provided.

  The pickup roller unit 41 is disposed above the rear portion of the paper feed tray 142 and is pivotable up and down with respect to the paper feed tray 142. The pickup roller unit 41 descends and frictionally feeds the paper stored in the paper feed tray 142. It is supposed to send. The bank portion 42 is disposed to be inclined rearward at the rear portion of the paper feed tray 142, and changes the direction of the leading edge of the paper fed by the pickup roller unit 41 upward. .

  The retard roller unit 43 is disposed so as to come into contact with the intermediate roller 45, and when the sheets are fed by the pickup roller unit 41, only the uppermost sheet is frictionally separated from the lower layer sheet. Yes. The front paper return unit 44 is formed in a claw shape and is disposed in the vicinity of the retard roller unit 43, so that the lower layer paper separated by the retard roller unit 43 is put on the claw and returned to the paper feed tray 142. It has become. The assist roller 46 is disposed so as to be in constant contact with the intermediate roller 45. The uppermost sheet separated by the retard roller unit 43 is sandwiched between the intermediate roller 45 and reversed into a U-shape so that the platen Feed to 155.

  As shown in FIG. 3, the front EJ 145 includes a first paper discharge roller 51 and a first jagged roller 52, a second paper discharge roller 53 and a second jagged roller 54, and the like. The first paper discharge roller 51 is disposed on the downstream side of the platen 155, and sandwiches and discharges the paper passing through the platen 155 together with the first knurled roller 52. Further, the second paper discharge roller 53 The paper is disposed downstream of the first paper discharge roller 51, and the paper is nipped together with the second jagged roller 54 to be discharged onto the paper discharge tray 143.

  The paper supply / discharge unit 240 is configured to feed on the front side using the paper discharge tray 143 of the paper supply / discharge unit 140, switch back, and discharge on the front side. It is possible to manually feed and supply a tray in which thick paper that cannot be bent, an optical disk or the like is stored. Hereinafter, paper feeding by the paper feeding unit 130 is referred to as rear paper feeding, paper feeding by the paper feeding / discharging unit 140 is referred to as front paper feeding, and paper feeding by the paper feeding / discharging unit 240 is referred to as center paper feeding.

  As shown in FIG. 3, the recording unit 150 includes a paper feed roller 151 that feeds paper in the sub-scanning direction in synchronization with the recording operation, a driven roller 152 thereof, and a carriage 153 that moves in the main scanning direction in synchronization with the recording operation. A recording head 154 that discharges ink in synchronization with the recording operation, a platen 155 that holds the paper during recording flat, and the like are provided.

  As shown in FIG. 3, the paper feed roller 151 is arranged on the upstream side of the platen 155 in the conveyance, and the paper fed by the paper feed roller 32 or the paper fed reversely by the intermediate roller 45 is shown in FIG. The paper feed mechanism 156 shown in FIG. 4 is sandwiched with the driven roller 152 and sent out to the platen 155. The carriage 153 is inserted through the carriage guide shaft 157 shown in FIG. 3 above the platen 155 and connected to the carriage belt 158 shown in FIG. 2. When the carriage belt 158 is operated by the carriage motor 159 shown in FIG. Along with the movement of the carriage belt 158, the carriage belt 158 is guided by the carriage guide shaft 157 to reciprocate.

  As shown in FIG. 3, the recording head 154 is mounted on the carriage 153 at a predetermined distance from the platen 155. For example, the recording head for black ink that discharges black ink, yellow, cyan, light cyan, And a plurality of color ink recording heads for ejecting magenta and light magenta inks, respectively. The recording head 154 is provided with a pressure generating chamber and a nozzle opening connected to the pressure generating chamber. The size of the recording head 154 is controlled from the nozzle opening toward the sheet by storing ink in the pressure generating chamber and pressurizing it with a predetermined pressure. Ink droplets are discharged.

  FIG. 6 is a perspective view showing the positional relationship of the three paper feed systems of the inkjet multifunction peripheral 100, and FIGS. 7A, 7B, and 7C are perspective views showing details of the flap 200, and a plan view. FIG. 8 is a side view showing the positional relationship between the flap 200 and the intermediate roller 45. The rear paper feed by the paper feed unit (first supply unit) 130 flows in the direction indicated by the arrow a in the drawing, and the front paper feed by the paper supply / discharge unit (second supply unit) 140 by the arrow b shown in the drawing. The sheet flows in the direction shown, and the sheet feeds in the direction indicated by the arrow c in the center feeding by the paper supply / discharge unit (third supply unit) 240. A flap (guide member) 200 for guiding sheet feeding is disposed at the junction of the sheet feeding paths for rear feeding, front feeding, and center feeding.

  The flap 200 is disposed along upper portions of the intermediate roller (first roller) 45 and the assist roller (second roller) 46, and is integrated with the flap body (guide body) 210 and the flap body 210. A plurality of formed flap ribs (guide ribs) 220A and 220B are provided. The flap body 210 is formed in a substantially rectangular flat plate shape, is disposed so as to be substantially flat above the intermediate roller 45 and the assist roller 46, and is provided on the other end side with the merging point side as a free end. A shaft (not shown) is inserted into the bearing 211 shown in FIG. As a result, the flap 200 can be moved up and down by its own weight or paper feeding force.

  The flap ribs 220 </ b> A and 220 </ b> B are formed in a substantially triangular flat plate shape and are disposed at a predetermined interval with respect to the lower surface of the flap body 210. The flap ribs 220A are disposed on both sides of the assist roller 46, and the flap ribs 220B are disposed between the flap ribs 220A. The flap ribs 220A and 220B are formed so that the junction point side, that is, the front end sides 221A and 221B extend substantially linearly and horizontally, and the counter junction point side, that is, the rear end sides 222A and 222B are inclined in a substantially arc shape. It is formed as follows. That is, the front end sides 221A and 221B of the flap ribs 220A and 220B are formed so as to face the paper feed roller 151, and the rear end sides 222A and 222B of the flap ribs 220A and 220B are formed along the intermediate roller 45. Yes.

  In particular, as shown in FIG. 8, the flap ribs 220A disposed on both sides of the assist roller 46 have a front end side 221A having the same shape as the front end side 221B of the flap rib 220B, but the rear end The side 222A is formed closer to the intermediate roller 45 than the rear end side 222B of the flap rib 220B. As a result, the fed paper undulates between the flap rib 220A and the flap rib 220B, so that it can be brought into contact with the intermediate roller 45 without fail.

  Further, as shown in FIG. 7B, the portions 223A between the flap ribs 220A disposed on both sides of the assist roller 46 are formed so as to protrude toward the tip side 221A, that is, the assist roller. 46 is further covered. Thereby, since the own weight between flap ribs 220A increases, the pressing force of the flap ribs 220A against the paper can be increased.

  9 to 11 are side views showing the state of the flap 200 during front paper feeding, rear paper feeding, and center paper feeding. As shown in FIG. 9, during front paper feeding, the paper undulates between the flap rib 220A and the flap rib 220B and contacts the intermediate roller 45, and the paper is further pressed against the intermediate roller 45 by the flap rib 220A. As a result, the feeding force is increased and feeding is performed with high accuracy. As shown in FIGS. 10 and 11, when the rear sheet feeding and the center sheet feeding are performed, the flap 200 is lowered by its own weight, so that the sheet is fed with high accuracy without interfering with the flap 200. Even if the flap 200 is positioned at the opposite position during each feeding, the flap 200 does not interfere with feeding because it is pushed up or pushed down by the fed paper.

  In such a configuration, an operation in the case of recording on a sheet by the inkjet multifunction peripheral 100 will be described. In the case of front sheet feeding, the user activates the inkjet multifunction peripheral 100 by storing a plurality of sheets before recording in the sheet feeding tray 142. The sheets stacked and stored in the sheet feed tray 142 are frictionally fed to the intermediate roller 45 by the lowered pickup roller unit 41, and only the uppermost sheet is separated by the retard roller unit 43 driven by the sheet return shaft 72. Are sent.

  At this time, the paper undulates between the flap rib 220A and the flap rib 220B and comes into contact with the intermediate roller 45, and further, the paper is pressed against the intermediate roller 45 by the flap rib 220A. Sent. Then, the separated lower layer paper is returned to the paper feed tray 142 by the paper return 71 driven by the paper return shaft 72. The paper is skewed and cueed, and is nipped by the paper feed roller 151 driven by the paper feed mechanism 156 and its driven roller 152 and fed to the platen 155.

  In the case of rear paper feeding, the user completely pulls out the second support 22 of the paper support 133 from the first support 21 and sets the first support 21 completely out of the frame 132. Then, a plurality of sheets before recording are stored in the paper support 133 and the inkjet type multifunction peripheral 100 is activated. The paper stacked and stored in the paper support 133 is pressed against the paper feed roller 32 by the hopper 31 being lifted by the restoration of the compression spring mechanically synchronized with the rotation of the paper feed roller 32, and only the uppermost paper is the retard roller 33. Are separated and fed to the paper feed roller 151.

  At this time, since the flap 200 is lowered by its own weight, the sheet is fed with high accuracy without interfering with the flap 200. The paper is skewed and cueed, and is nipped by the paper feed roller 151 driven by the paper feed mechanism 156 and its driven roller 152 and fed to the platen 155.

  The sheet is recorded by a recording head 154 mounted on a carriage 153 scanned by a carriage motor 159 and a carriage belt 158. At this time, the control unit of the inkjet multifunction peripheral 100 supplies each color ink to the recording head 154 from a total of seven color ink cartridges, for example, yellow, magenta, light magenta, cyan, light cyan, and black. High-precision ink dot control, halftone processing, and the like are executed by controlling the driving of the carriage 153 and the paper feed roller 151. The paper on which recording has been completed is sandwiched between the first paper discharge roller 51 and the first jagged roller 52, the second paper discharge roller 53 and the second jagged roller 54 driven by the paper feed mechanism 156, and the paper supply / discharge unit 140. And is stacked and placed on a paper discharge tray 143.

  As described above, according to the inkjet multifunction peripheral 100 of the present embodiment, the junction point of each sheet feeding path of the rear sheet feeding, the front sheet feeding, and the center sheet feeding corresponds to the sheet to be fed. Since a flap 200 that is movable and guided by its own weight or paper feeding force is provided, fine adjustment of only one flap 200 allows the paper to smoothly pass through the three paper feeding paths. The adjustment processing time can be shortened.

  Further, the flap 200 has a plurality of flap ribs 220 </ b> A and 220 </ b> B that allow the paper fed by the paper feeding / discharging unit 140 to run along the intermediate roller 45 so as to extend in the direction of the junction with a predetermined interval from the flap body 210. Since the portions 222A on the opposite side of the flap rib 220A located on both sides of the assist roller 46 are formed in a shape close to the intermediate roller 45, the sheet is placed between the flap ribs 220A and 220B. It is possible to feed the paper more reliably by making it undulate and making it contact with the intermediate roller 45 reliably.

  Further, the flap 200 increases the weight between the flap ribs 220A located on both sides of the assist roller 46, thereby bringing the fed paper closer to the intermediate roller 45. Therefore, the force for pressing the flap rib 220A against the paper increases. The sheet can be reliably brought into contact with the intermediate roller 45. Further, since the weight between the flap ribs 220A located on both sides of the assist roller 46 is formed so as to cover the assist roller 46 to increase its own weight, the weight between the flap ribs 220A can be easily increased. Note that the inkjet multifunction peripheral 100 having the three sheet feeding systems of the front sheet feeding, the rear sheet feeding, and the center sheet feeding has been described, but the invention can also be applied to the inkjet multifunction peripheral 100 having a plurality of sheet feeding systems. .

  Any recording apparatus provided with a medium feeding apparatus can be applied to, for example, a facsimile apparatus, a copying apparatus, and a scanner. In addition to a recording apparatus, the meaning of a liquid ejecting apparatus that ejects a liquid corresponding to its use from a liquid ejecting head onto an ejected medium instead of ink and attaches the liquid to the ejected medium is, for example, a liquid crystal display Color material jet head used for manufacturing color filters, electrode material (conductive paste) jet head used for electrode formation for organic EL display and surface emitting display (FED), bio-organic jet head used for biochip manufacturing, precision pipette The present invention can also be applied to an apparatus equipped with a sample ejection head or the like.

1 is a perspective view illustrating an overall appearance configuration of an ink jet type multifunction peripheral that is one of recording apparatuses according to an embodiment of the present invention. FIG. 2 is a perspective view showing an internal structure of the multifunction machine of FIG. 1. FIG. 3 is a schematic side view of the internal structure of the multifunction machine of FIG. 2. FIG. 2 is a side view showing details of a paper support and a rear ASF of the multifunction machine of FIG. 1. FIG. 2 is a side view showing details of a front ASF of the multifunction machine of FIG. 1. FIG. 2 is a perspective view illustrating an arrangement relationship of three sheet feeding systems of the multifunction machine of FIG. 1. It is the perspective view which shows the detail of a flap, a top view, and a side view. It is a side view which shows the arrangement | positioning relationship between a flap and an intermediate | middle roller. It is a side view which shows the state of the flap at the time of front paper feeding. It is a side view which shows the state of the flap at the time of rear paper feeding. It is a side view which shows the state of the flap at the time of center paper feeding.

Explanation of symbols

21 First support, 22 Second support, 23 Fixed edge guide, 24 Movable edge guide, 31 Hopper, 32 Paper feed roller, 41 Pickup roller unit, 43 Retard roller unit, 44 Front paper return unit, 45 Intermediate roller, 46 Assist Roller, 61 retard roller, 62 roller holder, 63 tension spring, 71, 81 paper return, 72, 82 paper return shaft, 73 cam floor, 74 cam clutch, 75 cam, 76 cam floor, 100 inkjet compound machine, 101 housing, 110 Printer, 120 Scanner, 130 Paper Feeder, 131 Rear Paper Feeder, 132 Frame, 133 Paper Support, 134 Rear ASF, 140, 240 Paper Feeder, 141 Front Paper Feeder, 142 Paper Tray, 143 Paper Delivery Tray, 144 frames Ronto ASF, 150 recording section, 200 flap, 210 flap body, 220A, 220B flap rib

Claims (4)

A first supply unit that supplies a foldable medium from the front side of the apparatus, a second supply unit that supplies the medium from the back side of the apparatus, and the medium or a non-bendable medium from the front side or the back side of the apparatus A medium feeding device comprising a third feeding unit for feeding,
One guide member that moves and guides corresponding to each medium to be fed is provided at the confluence of the medium feeding path of each supply unit ,
The guide member includes a first roller and a second roller for nipping and feeding the medium;
The guide member is integrally formed such that a plurality of guide ribs for causing the medium fed by the first supply unit to run along the first roller extend in the direction of the junction with a predetermined interval from the guide body. Formed on the opposite sides of the guide ribs located on both sides of the second roller are formed in a shape close to the first roller;
The medium feeding mechanism, wherein the guide member brings the medium to be fed closer to the first roller by increasing the weight of the guide ribs located on both sides of the second roller. apparatus.
The medium feeding device according to claim 1, wherein the weight is increased by forming a space between the guide ribs located on both sides of the second roller so as to cover the second roller .
A first supply unit that supplies a foldable medium from the front side of the apparatus, a second supply unit that supplies the medium from the back side of the apparatus, and the medium or a non-bendable medium from the front side or the back side of the apparatus A medium feeding device comprising a third feeding unit for feeding,
One guide member that moves and guides corresponding to each medium to be fed is provided at the confluence of the medium feeding path of each supply unit,
The guide member is formed with a plurality of guide ribs at predetermined intervals so that guide ribs that run along the intermediate roller of the medium fed by the first supply unit extend in the direction of the junction. ,
The guide member is formed in a shape in which a portion of the guide rib on the side opposite to the joining point is close to the intermediate roller;
The medium feeding device according to claim 1, wherein the guide member includes means for changing the shape of the medium being fed between the guide member and the intermediate roller into a wavy shape.
The means for changing to the undulating shape is:
A plurality of first ribs as the guide ribs and a plurality of second ribs as the guide ribs are formed adjacent to each other on the guide member,
4. The medium feeding according to claim 3, wherein a portion of the second rib on the side opposite to the confluence point is closer to the intermediate roller than a portion on the side opposite to the confluence point of the first rib. apparatus.

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