JP4428194B2 - 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.

  An ink jet printer, which is one of general recording apparatuses, includes an automatic paper feeder at the upper part on the back side and an automatic paper discharge apparatus at the lower part on the front side. The automatic paper feeder includes a paper feed roller that feeds paper and a retard roller that is disposed opposite to the paper feed roller and separates the uppermost paper and the lower paper when the paper is double fed. ing. In front of the nip point between the paper feed roller and the retard roller, a frontage restricting member extending opposite to the left and right sides of the retard roller support frame is disposed. This frontage regulating member has a function of regulating the number of sheets guided to the frontage with the paper feed roller.

JP 2004-83269 A

  In the above-described conventional inkjet printer, the feed roller shaft is bent and the feed roller shaft position fluctuates due to a paper pressing load at the time of paper feeding, a hopper lifting load, a brake load of a torque limiter, and the like. There is a case. When the fluctuation of the sheet feed roller shaft position occurs, the gap between the sheet feed roller and the slot restricting member changes, which may cause a problem in sheet feeding.

  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 medium feeding device capable of suppressing fluctuations in the gap between the medium storage portion and the supply roller and the medium feeding device. An object of the present invention is to provide a recording apparatus and a liquid ejecting apparatus provided with a feeding device.

  In order to achieve the above object, in the medium feeding device of the present invention, a medium storage unit that stores and stores a medium, and a supply that supplies the medium stored and disposed in the vicinity of the medium storage unit. A medium feeding device having a roller, characterized by comprising an adjusting means for adjusting a gap between the medium accommodating portion and the supply roller. Thereby, the gap of the frontage can be adjusted according to the situation, so that highly accurate paper feeding can always be performed.

  Further, the adjusting means adjusts the gap by restricting the deflection of the shaft of the supply roller. Thereby, even if a load is applied to the supply roller, it is possible to suppress fluctuations in the shaft position of the supply roller. Further, the adjusting means is characterized in that it regulates the shaft of the supply roller in contact with the bending direction and a direction orthogonal thereto. Thereby, the bending of the shaft of the supply roller can be suppressed almost completely. Further, the adjusting means is characterized in that the gap is adjusted using a spacer. Thereby, adjustment of the clearance gap of a frontage part can be performed easily. Further, the adjustment means adjusts the gap by regulating the height of the medium storage unit. Thereby, the gap of the frontage can be adjusted according to the situation, so that highly accurate paper feeding can always be performed.

  In order to achieve the above object, the recording apparatus of the present invention is a recording apparatus for recording on a medium, and is provided with each of the medium feeding apparatuses. The liquid ejecting apparatus of the present invention is a liquid ejecting apparatus that ejects a liquid onto a medium to be ejected, and includes the above-described medium feeding devices. 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. A sheet feeding unit 130 including a characteristic portion of the present invention is disposed on the back side, and a sheet feeding / discharging unit 140 is disposed on the front side. Since the user can select one or both of the paper feeding unit 130 on the rear side and the paper feeding / discharging unit 140 on the front side as the setting direction of the paper before recording, the degree of freedom of the installation position of the inkjet multifunction peripheral 100 Can be increased. Furthermore, since the paper after recording is always discharged from the paper supply / discharge section 140 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.

  In the housing 101, as shown in FIGS. 2 and 3, a paper feed unit 130, a paper feed / discharge unit 140, a recording unit 150, and the like are disposed. 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 including a characteristic portion of the present invention that feeds 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. . Further, the front opening adjusting means 35 and 36 (FIGS. 10, 12, etc.) for adjusting the gap between the front opening of the frame (medium storage portion) 132 and the paper feed roller (supply roller) 32, which is a characteristic part of the present invention. The details of the front opening adjusting means 35 and 36 will be described later.

  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. The paper supply / discharge unit 140 is also configured to be able to manually feed and supply a tray containing thick paper, an optical disk, or the like that cannot be bent during paper supply / discharge. .

  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.

  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. Next, the paper feeding unit 130 including the characteristic part of the present invention will be further described with reference to the drawings.

  FIG. 6 is a perspective view of the details of the paper feeding unit 130 seen from an oblique front, FIG. 7 is a perspective view of the paper feeding unit 130 seen obliquely from the rear, and FIG. 8 is a perspective view of the paper feeding unit 130 seen obliquely from below. This will be described with reference to the side view of FIG. As described above, the paper feeding unit 130 includes the paper support 133 and the rear ASF 134 disposed on the frame 132. The frame 132 includes a right side wall 132a and a left side wall 132b as viewed from the front side of the apparatus, and a rear wall 132c and a bottom panel 132d provided between them. Since the paper support 133 and the rear ASF 134 are configured as one unit surrounded by the frame 132, handling of the inkjet multifunction peripheral 100 during assembly and repair becomes easy.

  The first support 21 is disposed inside the rear wall 132c of the frame 132 and between the right side wall 132a and the left side wall 132b, and both side ends of the first support 21 are vertically moved along the right side wall 132a and the left side wall 132b. It is inserted so that it can slide freely. The second support 22 is housed on the back side of the first support 21 so that the upper end protrudes, and both side ends of the second support 22 can slide up and down along both side walls of the first support 21. It is inserted. Since the paper support 133 can be stored and pulled out in two stages of the first support 21 and the second support 22, the area when stored can be reduced, and the support area when pulled out can be increased. be able to.

  The fixed edge guide 23 is integrally formed so as to rise vertically from the right end of the hopper 31, and the movable edge guide 24 is parallel to the fixed edge guide 23 and formed between the left end and the right end of the hopper 31. It is slidably disposed along the groove 31a. Since the movable edge guide 24 can move smoothly, the sheet can be accurately sandwiched with the fixed edge guide 23 in accordance with the width.

  The hopper 31 is disposed inside the first support 21 and between the right side wall 132a and the left side wall 132b of the frame 132. The lower end of the hopper 31 pivots about the upper end, and the lower end of the stored paper Is pressed against or separated from the paper feed roller 32. Both ends of the paper feed roller 32 are disposed near the right end of the paper feed roller shaft 32 a that is rotatably disposed between the right side wall 132 a and the left side wall 132 b of the frame 132. The paper feed roller 32 is provided with rubber or the like on the outer periphery so that the paper can be easily fed by friction. The paper feed roller shaft 32a is provided with three auxiliary paper feed rollers 32b in accordance with the width of the main paper.

  The retard roller 33 is rotatably supported at a position in contact with the paper feed roller 32 on the bottom plate 132d of the frame 132. The rear paper return unit 34 is rotatably supported by shafts on both sides of the retard roller 33 on the bottom plate 132d of the frame 132 and at four locations in the vicinity of the auxiliary paper feed roller 32b. Next, details of the adjusting means 35 for adjusting the gap between the frame (medium storage portion) 132 and the paper feed roller (supply roller) 32, which is a characteristic part of the present invention, will be described with reference to the drawings. .

  FIG. 9 is a side view showing an opening between the frame 132 and the paper feed roller 32. The front opening A is a gap between the sheet feeding surface 132 da formed directly on the retard roller 33 formed on the bottom plate 132 d of the frame 132 and the arc circumferential surface 32 b of the sheet feeding roller 32. By keeping the gap of the front opening A constant, the number of sheets P that can be passed through the hopper 31 drawn out by the sheet feeding roller 32 can be made constant, and the subsequent separation of the sheet by the retard roller 33 can be performed. It can be done reliably. Accordingly, the front opening adjusting means 35 and 36 shown in FIG. 10 and the like for adjusting the gap of the front opening A are provided.

  FIG. 10 is a perspective view showing an arrangement position of the front opening adjusting means 35, and FIG. 11 is a side view thereof. The front opening adjusting means 35 is a means for adjusting on the paper feed roller 32 side, and is formed in a shape composed of an upper surface portion 35a and a side surface portion 35b obtained by bending a sheet metal into a substantially L shape. And the upper surface part 35a protrudes in the one end side, and the screw hole 35c is drilled in the protrusion part. Further, the side surface portion 35b is formed with a semicircular pressing portion 35d that presses the outer periphery of the paper feed roller shaft 32a from above at the center lower portion, and the lower end on one end protrudes similarly to the upper surface portion 35a. A downward slit 35e is formed in the protruding portion.

  The front opening adjusting means 35 having such a configuration is attached by the following method. That is, the lower end of the side surface portion 35b is inserted into the hole 108a formed in the wall surface of the main body frame 108, and the slit 35e is inserted into the edge of the hole 108a. Then, the pressing part 35d presses the outer periphery of the paper feed roller shaft 32a from above, and one end side of the upper surface part 35a is placed on the upper part of the main body frame 108 via a spacer 35f having a predetermined thickness. It is fixed by screwing through the hole 35c. Thereby, the clearance gap of the frontage part A can be adjusted to a predetermined space | interval. Therefore, the number of sheets that can be passed through the paper on the hopper 31 drawn by the paper feed roller 32 can be made constant, and the subsequent separation of the paper by the retard roller 33 can be performed reliably.

  At this time, the front-portion adjusting means 35 is provided with three parts, that is, the rear part 35da, the upper part 35db, and the front part 35dc of the pressing part 35d, that is, the paper pressing load on the paper feed roller 32, the rising load of the hopper 31, It abuts on the outer periphery of the paper feed roller shaft 32a in the direction of bending of the paper feed roller shaft 32a when a brake load or the like is applied and in a direction perpendicular thereto. As a result, even when the above-described load is applied to the paper feed roller 32, the deflection of the paper feed roller shaft 32a can be restricted, so that fluctuations in the shaft position of the paper feed roller shaft 32a can be prevented. The gap of A can be adjusted to a predetermined interval. Therefore, the number of sheets that can be passed through the paper on the hopper 31 drawn by the paper feed roller 32 can be made constant, and the subsequent separation of the paper by the retard roller 33 can be performed reliably.

  FIG. 12 is a perspective view showing an arrangement position of the front opening adjusting means 36, and FIG. 13 is an exploded perspective view thereof. The front opening adjusting means 36 is a means for adjusting on the bottom board 132d side of the frame 132, and comprises a part including the sheet feeding surface 132da shown in FIG. 9 as a separate body. The front opening adjusting means 36 is formed in a substantially C shape that sandwiches both sides of the retard roller 33. And it is attached to slide surface 132db extended on the same locus as the rotation locus of hopper 31 formed in bottom board 132d of frame 132.

  FIG. 14 is a side view for explaining the adjusting method of the front opening adjusting means 36. Such a front opening adjusting means 36 is slidable in the direction indicated by the arrow in FIG. The gap can be adjusted to a predetermined interval. Therefore, the number of sheets that can be passed through the paper on the hopper 31 drawn by the paper feed roller 32 can be made constant, and the subsequent separation of the paper by the retard roller 33 can be performed reliably.

  In such a configuration, an operation in the case of recording on a sheet by the inkjet multifunction peripheral 100 will be described. 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 sheets stacked and stored on the paper support 133 are pressed against the sheet feed roller 32 by the hopper 31 being lifted by the restoration of the compression spring mechanically synchronized with the rotation of the sheet feed roller 32, and only the uppermost sheet is adjusted. The paper is separated by the retard roller 33 through the front opening A and fed to the paper feed roller 151. Then, the separated lower layer paper is pushed back to the hopper 31 by the rear paper return unit 34. On the other hand, the uppermost sheet 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 ink jet type multifunction peripheral 100 of the present embodiment, the front end for adjusting the clearance between the front end 132d of the frame 132 and the front end portion A of the arc peripheral surface 32b of the paper feed roller 32 is adjusted. Since the section adjusting means 35 and 36 are provided, the gap of the front opening A can be adjusted according to the situation, and highly accurate paper feeding can always be performed. Further, since the gap adjustment means 35 adjusts the gap by restricting the bending of the paper feed roller shaft 32a, even if a load is applied to the paper feed roller 32, fluctuations in the shaft position of the paper feed roller 32 can be suppressed. it can.

  Further, the front opening adjusting means 35 abuts and regulates the sheet feeding roller shaft 32a in the direction of deflection and the direction perpendicular thereto, so that the deflection of the sheet feeding roller shaft 32a can be suppressed almost completely. Further, since the gap adjusting means 35 adjusts the gap using the spacer 35f, the gap of the gap A can be easily adjusted. Further, the front opening adjusting means 36 adjusts the gap by regulating the height of the sheet feeding surface 132da of the bottom 132d of the frame 132, so that the gap of the front opening A can be adjusted according to the situation. Accurate paper feeding can always be performed.

  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 of details of a sheet feeding unit of the multifunction peripheral of FIG. 1 as viewed obliquely from the front. FIG. 2 is a perspective view of details of a sheet feeding unit of the multifunction peripheral of FIG. FIG. 2 is a perspective view of details of a sheet feeding unit of the multifunction peripheral of FIG. 1 as viewed obliquely from below. It is a side view which shows the opening part between a flame | frame and a paper feed roller. It is a perspective view which shows the arrangement | positioning position of a frontage part adjustment means. It is a side view of FIG. It is a perspective view which shows the arrangement | positioning position of another opening part adjustment means. It is a disassembled perspective view of FIG. It is a side view for demonstrating the adjustment method of a frontage part adjustment means.

Explanation of symbols

21 First support, 22 Second support, 23 Fixed edge guide, 24 Movable edge guide, 31 Hopper, 32 Paper feed roller, 32a Paper feed roller shaft, 32b Arc peripheral surface, 34 Rear paper return unit, 35, 36 Frontage Adjusting means, 60 paper return section, 61 paper return lever, 62 paper return claw, 70 paper return drive section, 71 paper return shaft, 72 cam follower, 73 cam, 74 paper return return spring, 100 inkjet multifunction machine, 101 housing, 110 Printer, 120 Scanner, 130 Paper Feed Unit, 131 Rear Paper Feed Port, 132 Frame, 132da Paper Feeding Surface, 133 Paper Support, 134 Rear ASF, 140 Paper Feed / Discharge Portion, 144 Front ASF, 150 Recording Unit, A Frontage Part

Claims (1)

  A medium storage unit for storing and storing the medium;
  A supply roller that is disposed adjacent to the medium storage unit and feeds the stored medium;
  A swingable hopper provided in the medium storage unit;
  A retard roller in contact with the supply roller;
  A bottom plate having a slide surface extending along a swinging locus of the tip of the hopper and a paper feeding surface for conveying a medium from the hopper to the supply roller;
  A substantially C-shaped gap adjusting member that is slidably provided on the slide surface, and has a pair of tip portions protruding on the sheet feeding surface so as to sandwich the retard roller, A medium feeding device comprising: a gap adjusting member configured to be able to adjust the size of the gap with the supply roller by the slide.

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