JP2005280923A - Medium feeding device and recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medium feeding device capable of driving two systems of medium feeding means with a simple configuration, and a recording apparatus and a liquid ejecting apparatus provided with the medium feeding device.
SOLUTION A medium feeding device 130, 140 provided with automatic medium feeding means 134, 144 at least on the back side of the apparatus and on the front side of the apparatus generates a driving force for driving two types of medium feeding means 134, 144. And a switching means 70 for switching the transmission destination of the driving force of the driving source 61. As a result, the two systems of medium feeding means 134 and 144 can be switched reliably, so that a medium feeding error can be prevented.
[Selection] Figure 7

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.

  Inkjet printers, which are one type of recording apparatus, include a type having a rear sheet feeder that feeds paper from the back side and a type having a front sheet feeder that feeds paper from the front side. Each sheet feeding device is driven by its own sheet feeding motor or driven by using the driving force of the sheet feeding motor.

JP 2000-95356 A

  Inkjet printers equipped with both rear and front sheet feeders are desired due to the recent increase in functionality. However, if a sheet feeding motor is provided for each sheet feeding apparatus, the printer becomes larger. There is a risk. Further, when the paper feed motor is used, it is necessary to surely switch the driving of the rear paper feeding device and the front paper feeding device, which may complicate the driving force transmission mechanism.

  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 apparatus capable of driving two systems of medium feeding means with a simple configuration, and the medium feeding apparatus. And a liquid ejecting apparatus including the recording apparatus.

  In order to achieve the above object, the medium feeding apparatus of the present invention is a medium feeding apparatus provided with medium automatic feeding means at least on the back side of the apparatus and on the front side of the apparatus, the feeding of the two systems of medium feeding means. A driving source that generates a driving force for driving the feed roller and switching means for switching a transmission destination of the driving force of the driving source are provided. Thereby, since the two media feeding means can be switched reliably, a media feeding error can be prevented.

  Further, the switching means is operated by a combination of forward drive and reverse drive of the drive source. Thereby, the switching of the two media feeding means can be performed in a short time. In addition, it is characterized in that a maintenance means for maintaining the switching state of the switching means is provided. Accordingly, it is possible to prevent inadvertent switching to feeding by another medium feeding unit during feeding by the medium feeding unit.

  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 part of the present invention is disposed on the back side, and a paper feeding / discharging unit 140 including a characteristic part of the present invention 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 storage 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 including characteristic portions of the present invention are arranged. 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. The rear ASF 134 will be described later, and the paper support 133 will be described here.

  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 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.

  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. Further, as shown in FIG. 3, a front surface, which is a characteristic part of the present invention, automatically feeds the sheets stored in the sheet feed tray 142 one by one at the side of the front sheet feed / discharge port 141. A paper feed mechanism (hereinafter referred to as front ASF) 144 and a front paper discharge mechanism (hereinafter referred to as front EJ) 145 that automatically discharges paper to the paper discharge tray 143 are provided. The front ASF 144 will be described later. Here, the paper feed tray 142, the paper discharge tray 143, and the front EJ 145 will be described.

  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. .

  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.

  5 is a side view showing details of the front ASF 144, and FIG. 6 is a perspective view showing details of the rear ASF 134 and the front ASF 144, which will be described with reference to FIGS. A rear ASF (first-system medium feeding means) 134 includes 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, A retard roller 33 that separates the sheets fed by the sheet feed roller 32 into only one sheet, and a rear sheet return unit 34 that returns the remaining sheets separated by the retard roller 33 to the hopper 31 are provided.

  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. .

  A front ASF (second-system medium feeding unit) 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 orientation of the paper taken out by the pickup roller unit 41. I have. 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.

  The rear ASF 134 and the front ASF 144 are driven by the same paper feed motor (drive source) 61. That is, the rear ASF 134 is driven by the rear ASF gear mechanism 62 connected to the paper feed motor 61. On the other hand, the front ASF 144 excluding the pickup roller unit 41 is driven by a front ASF gear mechanism 63 connected to the paper feed motor 61. The pickup roller unit 41 is driven by a pickup roller unit drive mechanism 64 connected to the front ASF gear mechanism 63.

  The pickup roller unit drive mechanism 64 is connected to the transmission belt mechanism 65 connected to the front ASF gear mechanism 63, the transmission shaft mechanism 66 connected to the transmission belt mechanism 65, and the transmission shaft mechanism 66. A lifting mechanism 67 and a transmission belt mechanism 68 are provided. A clutch mechanism (switching means) 70 is provided for switching driving between the rear ASF gear mechanism 62, the front ASF gear mechanism 63, and the pickup roller unit drive mechanism 64.

  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 rear ASF gear mechanism 62, the front ASF gear mechanism 63, the pickup roller unit drive mechanism 64, and the clutch mechanism 70, which are characteristic parts of the present invention, will be further described with reference to the drawings.

  FIG. 7 is a perspective view showing details of the rear ASF gear mechanism 62, the front ASF gear mechanism 63, and the clutch mechanism 70, and FIG. 8 is a perspective view showing details around the pickup roller unit 41. As shown in FIG. 7, the rear ASF gear mechanism 62 includes a rear first spur gear 62a that meshes with a pinion 61a fitted in a shaft of the paper feed motor 61, and a rear second spur gear 62b that meshes with the rear first spur gear 62a. It has. As shown in FIG. 7, the front ASF gear mechanism 63 includes a front first spur gear 63a that meshes with a pinion 61a fitted on a shaft of the paper feed motor 61, and a front second spur gear 63b that meshes with the front first spur gear 63a. A front third spur gear 63c that meshes with the front second spur gear 63b and meshes with the pickup first spur gear 65a of the transmission belt mechanism 65 is provided.

  As shown in FIG. 7, the clutch mechanism 70 includes a trigger first spur gear 71 that meshes with a pinion 61a fitted on the shaft of the paper feed motor 61, a trigger second spur gear 72 that meshes with the trigger first spur gear 71, A trigger third spur gear 73 that meshes with the trigger second spur gear 72, a rear paper feed trigger 74 and a front paper return trigger 75 that are swingably arranged coaxially with the third trigger spur gear 73 are provided. Further, it is disposed on the shaft of the paper feed roller 32, and is disposed on the shaft of the rear clutch unit 76 and the front paper return unit 44, which are turned on and off by a rearward and forward swing of the rear paper feed trigger 74. A front clutch unit 77 that is turned on / off by a backward / forward swing of the return trigger 75 is provided. Note that the ON state due to the backward swing of the rear paper feed trigger 74 and the front paper return trigger 75 is regulated by a lip (maintenance means) 153 a disposed at the rear portion of the carriage 153.

  As shown in FIG. 6, the pickup roller unit 41 includes a pickup roller 69 and a pickup roller unit drive mechanism 64 disposed in the pickup holder 60. The pickup holder 60 is formed in a flat box shape, and the other end side is pivotably disposed around a transmission shaft 66a constituting a transmission shaft mechanism 66 supported on one end side. The pickup roller 69 is formed in a cylindrical shape, and the two pickup rollers 69 are disposed at a distance from a pickup roller shaft 69 a that is supported by the other end of the pickup holder 60.

  As shown in FIG. 6, the transmission belt mechanism 65 includes a first pulley 65b disposed coaxially with the front third spur gear 63c of the front ASF gear mechanism 63, and a pickup first gear fitted into one end of the transmission shaft 66a. A pickup second spur gear 65c that meshes with 66b, a second pulley 65d that is arranged coaxially with the pickup second spur gear 65c, and a belt 65e that spans between the first pulley 65b and the second pulley 65d. The transmission shaft mechanism 66 includes a transmission shaft 66a and a pickup first gear 66b and a pickup second gear 66c fitted at both ends thereof.

  As shown in FIG. 8, the elevating mechanism 67 includes a sun gear 67a provided in parallel with the second gear 66c of the transmission shaft mechanism 66, a first planetary gear 67b and a second planetary gear 67c meshing with the sun gear 67a, A first pickup tooth 67d and a second rack tooth 67e meshing with the first planetary gear 67b and the second planetary gear 67c, respectively, and a cam pickup 67g formed with the first rack tooth 67d and the second rack tooth 67e and an inclined surface 67f; A cam 67h that slides on an inclined surface 67f of the cam pickup 67g and a bistable spring 67i that positions the cam pickup 67g at a predetermined position are provided on the side surface of the pickup holder 60.

  The first planetary gear 67b and the second planetary gear 67c are arranged so as to be shifted from each other in the axial direction and the radial direction. The first rack teeth 67d and the second rack teeth 67e are formed so as to be shifted from each other in the longitudinal direction and the width direction. With this arrangement, when one of the first planetary gear 67b or the second planetary gear 67c is engaged with the first rack tooth 67d or the second rack tooth 67e, the other second planetary gear 67c or the second planetary gear 67c is engaged. A state in which the one planetary gear 67b is separated from the second rack tooth 67e or the first rack tooth 67d can be formed.

  As shown in FIG. 8, the transmission belt mechanism 68 includes a pickup spur gear 68a that meshes with the second pickup gear 66c of the transmission shaft mechanism 66, a first pulley 68b that is disposed coaxially with the pickup spur gear 68a, and a pickup roller shaft 69a. The belt includes a second pulley 68c fitted at one end thereof, a first pulley 68b and a belt 68d stretched over the second pulley 68c. Operations of the rear ASF 134 and the front ASF 144 configured as described above will be described with reference to the drawings.

  9 is a flowchart for explaining the operation of the rear ASF 134, FIG. 10 is a diagram showing the operation of the rear paper feed trigger 74 and the front paper return trigger 75 and the lip 153a of the carriage 153 at that time, and FIG. It is a perspective view which shows the state of the rear ASF gear mechanism 62 and the clutch mechanism 70 at the time. In the state before the rear paper feed, the rear paper feed trigger 74 and the front paper return trigger 75 are located in the rearward direction, and the carriage 153 is located in the home position (FIG. 10A).

  When the carriage 153 moves to the trigger side and the lip 153a restricts the forward swing of the front paper return trigger 75 (step S1 in FIG. 9, FIG. 10B), the paper feed motor 61 rotates in the reverse direction (CCW). ) And the rear paper feed trigger 74 swings forward (step S2 in FIG. 9, FIG. 10B, FIG. 11). Then, the rear clutch unit 76 is turned on and the paper feed roller 32 rotates to feed the uppermost sheet. Thereafter, the paper feed motor 61 rotates forward (CW), the rear paper feed trigger 74 swings backward, the rear clutch unit 76 is turned off, and the rear paper feed is started (step S3 in FIG. 9, FIG. 9). 10 (C)). Then, the carriage 153 returns to the home position (FIG. 10C).

  12 is a flowchart for explaining the operation of the front ASF 144, FIG. 13 is a diagram showing the operation of the rear paper feed trigger 74 and the front paper return trigger 75 and the lip 153a of the carriage 153 at that time, and FIG. 7 is a perspective view showing a state of the front ASF gear mechanism 63 and the clutch mechanism 70 at the time. FIG. In the state before the front paper feed, the rear paper feed trigger 74 and the front paper return trigger 75 are located in the backward direction, and the carriage 153 is located in the home position (FIG. 13A).

  When the carriage 153 moves to the trigger side and the lip 153a restricts the forward swing of the rear paper feed trigger 74 (step S1 in FIG. 12, FIG. 13B), the paper feed motor 61 rotates in reverse (CCW). The front paper return trigger 75 swings forward (step S2, FIG. 13B, FIG. 14 in FIG. 12). Then, the front clutch unit 77 is turned on and the front paper return unit 44 rotates to push back the lower layer paper. Thereafter, the paper feed motor 61 rotates forward (CW) and the front paper return trigger 75 swings backward (step S3 in FIG. 12, FIG. 13C). Then, the front clutch unit 77 is turned off, the carriage 153 moves, and the lip 153a restricts the forward swing of the rear paper feed trigger 74 and the front paper return trigger 75 (steps S4 and FIG. 13C in FIG. 12). )). Then, the sheet feeding motor 61 is reversely rotated (CCW) and front sheet feeding is started (step S5 in FIG. 12, FIG. 10C).

  In such a configuration, an operation in the case of recording on a sheet by the inkjet multifunction peripheral 100 will be described. As described above, the user can select whether to perform rear paper feeding or front paper feeding by the printer driver. When the user selects rear paper feeding, first, 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.

  Then, the sheet is switched to the rear ASF 134 by the above-described operation, and the sheets stacked and stored in the paper support 133 are moved to the sheet feeding roller 32 by the hopper 31 being raised by the restoration of the compression spring mechanically synchronized with the rotation of the sheet feeding roller 32. Only the uppermost sheet is pressed and separated by the retard roller 33 and fed to the paper feed roller 151. 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.

  On the other hand, when the user selects front sheet feeding, first, 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 feeding tray 142 are frictionally fed to the intermediate roller 45 by the pickup roller unit 41, and only the uppermost sheet is separated and fed by the retard roller unit 43. 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 fed to the platen 155 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 MFP 100 of the present embodiment, the rear ASF 134 and the front ASF 144 that are two types of paper feeding means, the paper feeding motor 61 that generates the driving force, and the paper feeding motor 61 Since the clutch mechanism 70 that switches the transmission destination of the driving force is provided, the rear ASF 134 and the front ASF 144 can be switched reliably, and a paper feed error can be prevented.

  Further, since the clutch mechanism 70 operates by a combination of the forward drive and the reverse drive of the paper feed motor 61, the rear ASF 134 and the front ASF 144 can be switched in a short time. In addition, since the lip 153a of the carriage 153 that maintains the switching state of the clutch mechanism 70 is provided, the sheet feeding by the other front ASF 144 or the rear ASF 134 may be inadvertently switched during feeding by the rear ASF 134 or the front ASF 144. Can be prevented.

  Any recording apparatus provided with a medium feeding device can be applied to, for example, a facsimile machine, a copying machine, and the like. In addition to the 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 or the like 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 matter 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 showing details of a rear ASF and a front ASF of the multifunction machine of FIG. 1. It is a perspective view which shows the detail of the rear ASF gear mechanism of FIG. 6, a front ASF gear mechanism, and a clutch mechanism. It is a perspective view which shows the detail of the pick-up roller unit periphery of FIG. It is a flowchart explaining operation | movement of the rear ASF of FIG. FIG. 10 is a diagram illustrating operations of a rear paper feed trigger, a front paper return trigger, and a carriage lip in FIG. 9. FIG. 10 is a perspective view showing a state of a rear ASF gear mechanism and a clutch mechanism during rear paper feeding in FIG. 9. It is a flowchart explaining operation | movement of the front ASF of FIG. It is a figure which shows the operation | movement of the lip | rip of a rear paper feed trigger of FIG. 12, a front paper return trigger, and a carriage. It is a perspective view which shows the state of the rear ASF gear mechanism and clutch mechanism at the time of rear paper feeding of FIG.

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, 60 Pickup Holder, 61 Paper feed motor, 62 Rear ASF gear mechanism, 63 Front ASF gear mechanism, 64 Pickup roller drive mechanism, 67 Lift mechanism, 69 Pickup roller, 70 Clutch mechanism, 74 Rear paper feed trigger, 75 Front paper return trigger, 76 Rear clutch unit, 77 Front clutch unit, 100 Inkjet MFP, 101 Housing, 110 Printer, 120 Scanner, 130 Paper feed unit, 131 Rear paper feed port, 132 Frame, 133 Paper support, 34 rear ASF, 140 sheet discharge unit, 144 front ASF, 0.99 recording unit, 151 a paper feed roller, 153 a carriage, 153a lip 156 paper feed mechanism

Claims (5)

A medium feeding device provided with medium automatic feeding means at least on the back side and the front side of the device,
A driving source for generating a driving force for driving the feeding rollers of the two media feeding means;
A medium feeding device comprising switching means for switching a transmission destination of the driving force of the driving source. 2. The medium feeding apparatus according to claim 1, wherein the switching unit operates by a combination of forward drive and reverse drive of the drive source. The medium feeding device according to claim 1, further comprising a maintaining unit that maintains a switching state of the switching unit. A recording device for recording on a medium,
A recording apparatus comprising the medium feeding device according to claim 1. A liquid ejecting apparatus that ejects liquid onto a medium to be ejected,
A liquid ejecting apparatus comprising the medium feeding device according to claim 1.

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