JP2005343634A - Feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent skewing of ASF for suppressing promotion of skewing due to protrusion of a sheet material into the reference direction by bending. <P>SOLUTION: When a paper path is bent in a separation part and the separation part is on only reference side (a feeding roller is on only reference side), a non-reference side reaches an LF roller first and skews because difference in paper path occurs between the right and left sides. At this time, a rear end part of paper is deformed so as to swell on an outer side more than a reference wall because the paper path is bent. Although a side wall on the reference side is long by taking straight conveyance into account in a usual way of thinking, the reference side wall is provided in only a tip part of paper and the upstream side (rear end side of paper) has a configuration for letting the wall escape in the direction in which it leaves the paper because movement of the paper attempting to swell onto the reference side is obstructed and skewing is promoted. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention provides a separation unit for separating one sheet at a time from the sheet material stacking unit by stacking on the basis of one wall that regulates the transverse direction with respect to the conveyance direction so that a plurality of sizes of sheet materials can be conveyed. The present invention relates to a feeding device that is arranged on a side close to the reference wall in a direction transverse to the direction and that bends a path of a sheet material at a separation portion.

  Conventionally, this type of apparatus has attempted to prevent skew by making the reference wall as long as possible so that the sheet material is conveyed straight.

  However, in the above configuration, the side close to the reference wall in the left-right direction with respect to the conveyance direction (hereinafter referred to as the reference side; the opposite direction is referred to as the non-reference side) is bent greatly because the sheet material is held at the separation portion (bending) The small non-reference side and the non-reference side only follow the sheet material conveyance path (hereinafter referred to as a paper path) and cannot be bent greatly. (Large bending radius) As a result, the paper path length is different on the left and right, and the non-reference side is further advanced even if it is conveyed straight. At this time, the sheet material is three-dimensionally deformed in the left-right direction as shown in FIGS. At this time, since the reference wall extends to the upstream side in the conveyance direction, the rear end portion hinders the deformation of the sheet material, and the sheet material has been rotated counterclockwise. That is, the skew that the non-reference side proceeds first is further promoted.

  To correct this skew, there is a device that corrects skew by abutting the sheet material against the transport roller that is stopped or reversed, but there are also disadvantages such as time-consuming feeding and complicated drive system. It was. Moreover, even if skew correction is performed, the skew in advance needs to be small.

  In addition, when the paper path on the non-reference side is set to have a small bending radius in order to make the paper path length the same on the left and right, the transport load increases, and conversely in this system where the transport force is only on the reference side The reference side was skewed longer. In this direction, even if the skew correction is performed as described above, there is only a conveying force on the reference side, so it is difficult to generate a couple to correct the skew, and the skew cannot be sufficiently removed. It was also.

  In order to reduce the transport load on the non-reference side, a transport roller may be provided, or the transport roller may be extended to the non-reference side only for that purpose. It had become. It was also a cost-up factor.

In order to overcome the above-described problems, the reference wall is present only in the vicinity of the front end in the recording medium conveyance direction during loading, and the rest is escaped. On the opposite side of the reference wall, there is a side guide that is movable in a direction perpendicular to the conveyance direction and that regulates the other lateral direction of the recording medium with respect to the conveyance direction, and the restriction portion of the side guide is the reference wall It was set as the structure in which at least one part exists in the site | part which opposes. The recording medium stacking unit configured so that there is no roller or guide that is substantially the same as the outer peripheral surface of the transport roller on the non-reference side with respect to the cross-sectional position of the transport roller, or a portion that rotates integrally with the transport roller is located upstream in the transport direction. It was set as the structure which inclines in the direction which becomes high and the downstream side becomes low. The second reference wall escaped slightly away from the recording medium from the reference wall upstream of the reference wall. The reference wall escapes in such a direction as to gradually move away from the recording medium toward the upstream side in the transport direction. A structure is provided that includes a return means for returning the remaining recording medium after separation to the stacking unit. The returning means is also configured only on the reference side.
The system has an operation mode that does not have or does not use the skew feeding function. The driving source is the same as the transport unit and the recording unit.

  In order to overcome the above problem, if the reference wall is present only near the front end of the recording medium conveyance direction during loading, and the other is allowed to escape, it is possible to promote skew by bulging the sheet material in the reference direction by bending. I can hold it down.

  On the opposite side of the reference wall, there is a side guide that is movable in a direction perpendicular to the conveyance direction and that regulates the other lateral direction of the recording medium with respect to the conveyance direction, and the restriction portion of the side guide is the reference wall. If it is configured such that even a part of it is located at a portion directly facing the reference wall, it is possible to prevent the recording medium from being unnecessarily rotated by the pressing force from the side guide even in a configuration in which the reference wall escapes.

  For a configuration in which there is no roller or guide that is substantially the same as the outer peripheral surface of the transport roller on the non-reference side with respect to the cross-sectional position of the transport roller, or a configuration that does not rotate integrally with the transport roller, skewing due to the difference in the left and right paper paths Therefore, the effect of the present application is great.

  In the case where the recording medium stacking portion is inclined upward in the transport direction and downward in the downstream direction, the paper path is bent at the feeding roller portion, so that the present application can be easily applied. Further, the non-reference side of the remaining sheet material tends to protrude in the sheet feeding direction due to its own weight, and the non-reference side outer guide is lifted, so that the effect of the present application is great.

  By setting the second reference wall at a position slightly downstream from the reference wall on the downstream side of the reference wall, the setability of the sheet material to the stacking portion is improved. It is also effective when skewing due to some influence occurs. In addition, when the skew correction function is provided, reverse skew may occur more than necessary, and there is an effect of suppressing this.

  By setting the reference wall to expand toward the downstream side in the conveyance direction, the setting property of the sheet material to the stacking portion is improved. It is also effective when skewing due to some influence occurs. In addition, when the skew correction function is provided, reverse skew may occur more than necessary, and there is an effect of suppressing this.

  When the return means that can be adopted in the configuration having the return means for returning the remaining recording medium after separation to the stacking unit is also configured only on the reference side, the non-reference side of the remaining sheet material is likely to protrude in the paper feeding direction, The effect of the present application is great because it acts as if the outer guide on the non-reference side is lifted.

  In the case of a configuration having an operation mode that does not have or does not use the skew feeding function, printing is performed with the skew running, so the effect of the present application is great.

  When the driving source is the same as the conveyance unit and the recording unit, the effect of the present application is great because there is a demerit such as a complicated driving system in order to perform the skew correction function.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, and relative arrangements of the components described in the following embodiments should be appropriately changed according to the configuration of the apparatus to which the present invention is applied and various conditions. As long as there is no specific description, it is not the meaning which limits the scope of the present invention only to them.

  A first embodiment of the present invention will be described with reference to FIGS. 1 and 2 are perspective views of the recording apparatus according to the first embodiment, FIGS. 3 and 4 are perspective views of a mechanism unit of the recording apparatus according to the first embodiment, and FIG. 5 is a cross-sectional view of the recording apparatus according to the first embodiment. FIG. 6 is an explanatory schematic diagram in the cross-sectional direction related to the shape by the paper path, and FIG. 7 is an explanatory schematic diagram in the substantially plane direction related to the shape by the paper path.

  The recording apparatus 1 according to the present embodiment includes a feeding unit 2, a transport unit 3, a discharge unit 4, a carriage unit 5, a cleaning unit 6, a recording head 7, and the like. Then, these are divided into items and the outline is described sequentially.

(A) Feeding unit The feeding unit 2 separates the pressure plate 21 on which the sheet material (recording medium such as relatively low rigidity paper) P is stacked, the feeding roller 28 that feeds the sheet material P, and the sheet material P. The separation roller 241 and the return lever 22 as a return member for returning the sheet material P to the stacking position are attached to the separation base 20.

  The feeding roller 28 passes through a contact portion (hereinafter referred to as a nip of the conveyance roller) of a conveyance roller 36 and a pinch roller 37 of the conveyance unit 3 which will be described later, and has an outer periphery in a direction substantially perpendicular to a line connecting the centers of the rollers. It is located in such a position. This is to facilitate entry of the sheet material P into the conveyance roller nip. Furthermore, when recording on the sheet material P while narrowing the sheet path so that the leading end position of the sheet material P can be accurately detected, the sheet material P hits a guide that forms a conveyance path, and this imposes a load on the sheet material P. This is to prevent giving. This is because if the load is applied to the sheet material P, the amount of feed by the transport roller 36 during recording changes and the image is disturbed.

  As shown in FIG. 2, a feeding tray 26 for holding the stacked sheet materials P is attached to the exterior. The feed tray 26 is a rotary type, and is rotated and opened for use.

  The feeding roller 28 has a bar shape with a circular cross section. One feeding roller rubber 281 is provided near the sheet material reference (right side when viewed from the front of the apparatus, hereinafter referred to as the reference side, and the opposite side is referred to as the non-reference side), thereby feeding the sheet material.

  The reason why the feeding roller rubber 281 is arranged on the reference side is that various sheet sizes are set on the reference side. In many cases, the recording object is written from left to right on the sheet surface, and there are many recording objects on the left side of the sheet surface, so the right side of the corresponding device is used as a reference. In the case of feeding these sheet materials, it is desirable to dispose a separating portion near the reference. In the case of the ink jet recording system, a cap for performing maintenance of the recording head and preventing ink thirst is required. It is desirable from the aspect of recording speed to provide the sheet material outside the reference-side passage region and reduce the carriage scanning amount from the sheet material. Of course, the separation roller portion that opposes the feeding roller rubber also exists only on the reference side.

  The shaft portion of the feed roller is also short on the reference side only so short that the feed roller rubber 281 can be formed only on the reference side. A portion other than the reference side of the cross-sectional position of the feeding roller has a large paper path. This is because if the paper path is narrowed in the same manner as the reference side, it becomes a resistance when the paper is transported, causing skew.

  The drive to the feeding roller 28 shares a later-described transport motor 35. It is possible to selectively operate by obtaining gear output from the transport roller 36 and performing intermittent transmission of gear depending on the position of the carriage, although details will not be described.

  A movable side guide 23 is movably provided on the pressure plate 21, and presses the non-reference end of the sheet material P to regulate the left-right stacking position. On the other hand, the reference side has a reference wall 202 only at the tip portion at a position where a large number of sheet materials are stacked, and regulates the sheet material stacking position on the reference side. At this time, the left-right direction regulating wall of the side guide 23 is configured such that at least a part thereof is located at a position facing the reference wall. (Refer to FIG. 7) If there is no restriction part of the side guide 23 at the directly facing position, when the side guide 23 is strongly pressed toward the reference side, the paper is rotated clockwise in FIG. This is because loading is impossible.

  The pressure plate 21 can rotate around a rotation shaft coupled to the lower case 99 and is urged by the pressure plate spring 212 to the feeding roller 28. A separation sheet (not shown) made of a material having a large friction coefficient, such as an artificial skin, for preventing the sheet material P near the end of stacking from being double-fed is provided at a portion of the pressure plate 21 facing the feeding roller 28. . The pressure plate 21 is configured to be able to contact and separate from the feeding roller 28 by a pressure plate cam.

  Further, the separation base 20 has a separation roller holder 24 attached with a separation roller 241 for separating the sheet material P one by one. The separation roller holder 24 can be rotated around a rotation shaft provided on the separation base 20 and is supplied by a separation roller spring. The feed roller 28 is urged. The separation roller 241 has a configuration in which a clutch spring is attached and a portion to which the separation roller 241 is attached can rotate when a load exceeding a predetermined value is applied.

  The separation roller 241 is configured to be able to contact and separate from the feeding roller 28 by a separation roller release shaft 244 and a control cam. The positions of the pressure plate 21, the return lever 22, and the separation roller 241 are detected by an ASF sensor as a first detection means.

  The return lever 22 for returning the sheet material P to the stacking position is rotatably attached to the separation base 20 and is urged by a return lever spring in the release direction. Further, it is configured so as to be slidable also in the rotational radius direction, and is normally biased in the direction protruding from the sheet path by the return lever spring described above. When the sheet material P is returned, it is configured to rotate by the control cam.

  The state of feeding using the above configuration will be described below. In a normal standby state, the pressure plate 21 is released by a pressure plate cam (not shown), the separation roller 241 is released by the control cam, and the return lever 22 returns the sheet material P so that the sheet material P does not enter the back during loading. It is provided at a loading position that closes the loading port.

  When the sheet material feeding starts from this state, the separation roller 241 first comes into contact with the feeding roller 28 by driving the motor. Then, the return lever 22 is released, and the pressure plate 21 comes into contact with the feeding roller 28. In this state, feeding of the sheet material P is started. The sheet material P is limited by the pre-stage separation unit 201 provided on the separation base 20, and only a few sheets of the sheet material P are fed to the nip portion composed of the feeding roller 28 and the separation roller 241. The fed sheet material P is separated at the nip portion, and only the uppermost sheet material P is conveyed.

  After the sheet material P reaches a conveying roller 36 and a pinch roller 37, which will be described later, the pressure plate 21 is released by the pressure plate cam and the separation roller 28 is released by the control cam. The return lever 22 is returned to the loading position by the control cam. At this time, the sheet material P that has reached the nip portion constituted by the feeding roller 28 and the separation roller 241 can be returned to the stacking position.

(B) Conveying unit Next, the conveying unit will be described. The conveyance unit 3 is attached to a chassis 11 made of a bent metal sheet. The conveyance unit 3 includes a conveyance roller 36 that conveys the sheet material P and a PE sensor as second detection means. The conveying roller 36 has a structure in which the surface of the metal shaft is coated with ceramic fine particles, and the metal portions of both shafts are received by bearings and attached to the chassis 11. A transport roller tension spring is provided between the bearing and the transport roller 36 to apply a load during rotation to the transport roller 36 so as to perform stable transport, and a predetermined load is applied by urging the transport roller 36. ing.

  A plurality of driven pinch rollers 37 are provided in contact with the conveying roller 36. The pinch roller 37 is held by the pinch roller holder 30 and is urged by a pinch roller spring, so that the pinch roller 37 is in pressure contact with the transport roller 36 and generates the transport force of the sheet material P. At this time, the rotating shaft of the pinch roller holder 30 is attached to the bearing of the chassis 11 and rotates around the shaft.

  Furthermore, a guide portion for guiding the sheet material P is disposed at the entrance of the conveyance unit 3 to which the sheet material P is conveyed. Further, the pinch roller holder 30 is provided with a PE sensor lever for transmitting the leading edge and trailing edge detection of the sheet P to the PE sensor. A platen 34 is disposed below the conveyance roller 36 and the pinch roller 37 downstream in the conveyance direction. The platen 34 is for holding the paper at a predetermined height during printing. The platen 34 is attached to the lower case 99 and positioned.

  Further, a sheet material presser that covers an end portion of the sheet material P is provided on the sheet material reference side of the platen 34. As a result, even in the sheet material P whose end portion is deformed or curled, the end portion is lifted so as not to interfere with the carriage 50 or the recording head 7. Furthermore, a recording head 7 that forms an image based on image information is provided on the downstream side of the conveying roller 36 in the sheet material conveying direction.

  In the above-described configuration, the sheet material P sent to the transport unit 3 as described above is guided by the pinch roller holder 30 and the guide portion of the lower case 99 and is sent to the roller pair of the transport roller 36 and the pinch roller 37. At this time, the PE sensor lever 321 detects the leading end of the sheet material P that has been conveyed, and thereby obtains the recording position of the sheet material P.

  Further, the sheet material P is transported on the platen 34 by the roller pair 36 and 37 being rotated by the transport motor 35. On the platen 34, a rib serving as a conveyance reference surface is formed. The gap with the recording head 7 is managed, and the corrugation of the sheet material P is controlled together with the discharge unit described later. Thus, the undulation is configured not to become large.

  The drive to the transport roller 36 is transmitted by a timing belt to a pulley 361 provided on the shaft of the transport roller 36 by a timing belt. A code wheel 362 on which markings are formed at a pitch of 150 to 300 lpi for detecting the amount of conveyance by the conveyance roller 36 is provided on the axis of the conveyance roller 36, and an encoder sensor 363 that reads the code wheel 362 is a code wheel. It is attached to the chassis 11 at a position adjacent to 362.

(C) Carriage part The carriage part (recording means) 5 has a carriage 50 to which the recording head 7 is attached. The carriage 50 holds the lower guide rail 52 for reciprocating scanning in the direction perpendicular to the conveying direction of the sheet material P and the rear end of the carriage 50 to maintain a gap between the recording head 7 and the sheet material P. It is supported by the upper guide rail 111. The lower guide rail 52 is attached to the chassis 11. The upper guide rail 111 is formed integrally with the chassis 11.

  The carriage 50 is driven via a timing belt 541 by a carriage motor attached to the chassis 11. The timing belt 541 is stretched and supported by an idle pulley 542.

  A code strip 561 in which markings are formed at a pitch of 150 to 300 lpi for detecting the position of the carriage 50 is provided in parallel with the timing belt 541. In addition, an encoder sensor for reading it is provided on a carriage substrate mounted on the carriage 50. The carriage substrate is also provided with contacts for electrical connection with the recording head 7. In addition, the carriage 50 includes a flexible substrate 57 for transmitting the recording head 7 head signal from the electric substrate 91.

  In order to fix the recording head 7 to the carriage 50, the carriage 50 is provided with an abutting portion for positioning and pressing means for pressing and fixing. The pressing means is mounted on the head set lever 51 and is configured to act on the recording head 7 when the head set lever 51 is turned around the rotation fulcrum and set.

  As the recording head 7, an ink jet recording head equipped with a replaceable ink tank for each color ink tank is used. The recording head 7 is configured to eject ink by energizing an electrothermal converter in accordance with a recording signal, and using the film boiling generated in the ink by the thermal energy to cause bubble growth and contraction in the ink. The recording is performed by discharging from the outlet. In this way, by ejecting ink by growing and shrinking bubbles with thermal energy, it is possible to achieve ejection of a liquid with particularly excellent responsiveness.

  In the above configuration, when an image is formed on the sheet material P, the roller pairs 36 and 37 convey the sheet material P to the row position (position in the conveyance direction of the sheet material P) where the image is formed and the carriage 50 is imaged by the carriage motor. The recording head 7 is moved to the row position to be formed (position perpendicular to the conveying direction of the sheet material P), and the recording head 7 is opposed to the image forming position. Thereafter, the recording head 7 ejects ink toward the sheet material P by a signal from the electric substrate 91 to form an image.

(D) Discharge part The discharge part 4 comes into contact with the discharge roller 40 with a predetermined pressure and is driven by a spur 42 configured so as to be rotatable, a gear train for transmitting the drive of the conveying roller to the discharge roller 40, and the like. It is configured.

  The discharge roller 40 is attached to the platen 34. The discharge roller 40 is provided with a plurality of rubber portions on a metal shaft. The drive from the transport roller is driven by being transmitted to the discharge roller 40 via the idler gear.

  The spur 42 is a SUS thin plate provided with a plurality of convex shapes around the spur 42 and is integrally molded with the resin portion and attached to the spur holder 43. The spur 42 is attached to the spur holder 43 and pressed against the discharge roller 40 and the like by a spur spring provided with a coil spring in a rod shape. The spur is provided at a position corresponding to the rubber part and the elastic body part of the discharge roller 40, and mainly has a role of generating the conveying force of the sheet material P, and the rubber part and the elastic body part of the discharge roller 40 therebetween. It is provided at a position where the sheet material P is not present, and mainly serves to suppress lifting when the sheet material P is recorded.

  With the above configuration, the sheet material P on which an image is formed by the carriage unit 5 is sandwiched between the nip between the discharge roller 40 and the spur 42, conveyed, and discharged to the discharge tray 46. The discharge tray 46 is configured to be housed in the lower part of the lower case 99 that is the lower part of the exterior. Pull out and use when in use.

(E) Cleaning unit As shown in FIGS. 3 and 4, the cleaning unit 6 includes a pump 60 for cleaning the recording head 7, a cap 61 for suppressing the drying of the recording head 7, and the periphery of the nozzles of the recording head 7. The blade 62 is used to clean the face surface.

  Drive is transmitted from the aforementioned conveyance motor 35 via the conveyance roller 36, and the pump is operated when the conveyance roller 36 rotates in the reverse direction, and the pump does not function when rotation in the other direction.

  The cap is opened and closed by moving the cap up and down by the cam surface of the lower case 99 when the cap unit moves left and right according to the movement of the carriage.

  The pump 60 is configured to generate a negative pressure by squeezing two tubes with a pump roller. When the pump 60 is operated in a state where the cap 61 is in close contact with the recording head 7, unnecessary ink or the like is sucked from the recording head 7. A cap absorber is provided in the cap 61 portion in order to reduce ink remaining on the face surface of the head 7 after suction. For this reason, the ink remaining in the cap 61 is sucked in a state where the cap 61 is opened so that the ink remains stuck and does not cause any harmful effects. The waste ink sucked by the pump 60 is absorbed and held by a waste ink absorber (not shown) provided in the lower case 99.

  The blade 62 is placed on the cap portion and moves in the left-right direction as the carriage moves. At this time, the blade 62 moves perpendicularly to the scanning direction of the carriage 5 by the cam surface of another lower case 99. Cleaning of the face surface of the recording head 7 is performed by moving the carriage left and right. A plurality of blades 62 are provided for cleaning the vicinity of the nozzles of the recording head 7 and for cleaning the entire face surface.

  Next, the positional relationship of the sheet feeding unit will be described.

  In the case of ink jet recording, it is desirable to blow ink in the direction of gravity, and therefore the platen 34 is preferably substantially horizontal. Further, in order to convey the sheet material P so that it does not float at the recording unit, the sheet material P is made to enter the platen 34 obliquely (10 to 15 °) so that the sheet material P is in close contact with the platen 34. Is desirable. Therefore, it is desirable that the feeding roller nip be inclined. Therefore, as described above, it is preferable that the feeding roller 241 of the feeding unit is also located above.

  On the other hand, since the sheet feeding unit brings the pressure plate 21 and the separation roller 241 into contact with the feeding roller 28 as described above, the paper path is bent at the feeding roller portion. There is also a reason that it is desirable that the paper stacking unit of the paper feeding unit should stand so that the paper does not fall down in order to reduce the installation area of the apparatus. (Inclined in such a direction that the upstream side in the transport direction is high and the downstream side is low). In addition, if the stacking portion is inclined in this way, the paper hits the bottom surface due to the weight of the paper, and the leading edge is aligned.

  The behavior of the sheet material at this time will be described.

  FIG. 6 is a schematic diagram in the cross-sectional direction showing the behavior of the paper.

  As described above, the feeding roller portion exists only on the reference side. Since the reference side portion is conveyed across the sheet material P, the sheet material P is bent (indicated by P having a small bending radius in FIG. 6), but the non-reference side is not sandwiched, so the sheet material The rigidity of P makes it difficult to bend. (Indicated by P having a large bend radius in FIG. 6) (It becomes resistance when the paper path is narrowed so that the bend radius becomes small.) On the non-reference side where the bend radius is large, the paper path path is close and the tip comes out first. It will be. Therefore, it will skew.

  Further, in the configuration of the present embodiment, since the weight of the stacked sheet material P is applied in the transport direction, the remaining paper protrudes in the paper feed direction and acts as if the guide outside the sheet is lifted. For this reason, the non-reference route is likely to be closer and skewed. This further promotes when the return lever 22 is only on the reference side for cost reduction. However, even in the entire area, the return lever 22 is retracted at the moment of separation, so this is not a complete measure.

  At this time, the reference end surface of the sheet material P is also three-dimensionally deformed. The paper behavior at this time is shown in FIG. The conveyance direction is downward. As can be seen in this figure, the leading and trailing ends in the transport direction protrude to the right from the central portion. In this embodiment, since the reference wall surface of the apparatus is short, it is difficult to affect the shape of the sheet material P. However, when the reference wall 202 extends to the rear, the rear end of the sheet material P is prevented from coming out to the right. It will be. Therefore, the sheet material P is rotated counterclockwise, and the skew that the non-reference side comes out first is promoted. However, if the reference wall is short as in this embodiment, such a case is rare.

  A method of correcting the skew feeding by, for example, abutting the skewed sheet against the conveying roller 36 that is stopped or reversed can be considered. However, the time is excessive, and one method as in this embodiment is required. When the conveyance roller 36 and the feeding roller 28 are driven by a motor, there are disadvantages such as a complicated driving system and difficulty in reliably holding the conveyance roller 36 after the abutment. In addition, it is desirable that the skew amount in advance is not large even when the skew correction is performed.

  Up to now, it has been described that the parts other than the reference part have escaped greatly, but when setting the sheet material on the stacking part, it is difficult to know where it should be set if it has escaped too much, and it is not inside the reference wall. It is possible that it will be set on top. For this reason, it is necessary to provide a second reference wall that escapes slightly away from the recording medium from the reference wall slightly upstream from the reference wall. A similar effect can be obtained by gradually escaping the reference wall in the direction away from the recording medium toward the upstream side in the transport direction.

  In addition, there is also an effect of eliminating the adverse effect of skewing everywhere when the sheet is rotated due to some influence. In addition, when the skew correction function is provided, there is a conveyance force only on the reference side, so the rear of the sheet may be turned to the reference wall side more than necessary, and the function of suppressing the skew to the opposite side at that time is there.

  A second reference wall is provided on the upstream side of the reference wall. The second reference wall escapes slightly away from the recording medium.

1 is a perspective view of a recording apparatus according to a first embodiment. 1 is a perspective view of a recording apparatus according to a first embodiment. The perspective view of the mechanism part of the recording device in a 1st embodiment. The perspective view of the mechanism part of the recording device in a 1st embodiment. Sectional drawing of the recording device in 1st Embodiment Schematic explanatory diagram of the cross-sectional direction related to the shape of the paper path in the first embodiment Explanatory schematic diagram in a substantially planar direction related to the shape of the paper path in the first embodiment

Explanation of symbols

P sheet material 1 recording device 2 feeding unit 3 conveying unit 4 discharging unit 5 carriage unit 6 cleaning unit 7 recording head 11 chassis 20 separation base 21 pressure plate 22 return lever 23 movable side guide 24 separation roller holder 26 feeding tray 28 feeding Roller 30 Pinch roller holder 34 Platen 36 Transport roller 37 Pinch roller 40 Discharge roller 42 Spur 43 Spur holder 46 Discharge tray 50 Carriage 51 Headset lever 52 Lower guide rail 57 Flexible substrate 60 Pump 61 Cap 62 Blade 71 Ink tank 91 Electric substrate 98 Upper case 99 Lower case 201 Pre-stage separation section 202 Reference wall 212 Pressure plate spring 241 Separation roller 281 Feed roller rubber 361 Pulley 362 Code wheel 363 Encoder sensor 541 Timing belt 561 Cord strip

Claims (10)

In order to be able to transport recording media of multiple sizes, a separation unit for stacking one by one from the recording medium stacking unit with respect to the transport direction is loaded with reference to one wall that regulates the lateral direction with respect to the transport direction. In a configuration in which the path of the recording medium is bent at the separation portion, and arranged on the side close to the reference wall in the lateral direction,
A feeding apparatus characterized in that the reference wall is present only near the front end in the recording medium conveyance direction during loading, and the rest is escaped.   On the opposite side of the reference wall, there is a side guide that is movable in a direction perpendicular to the conveyance direction and that regulates the other lateral direction of the recording medium with respect to the conveyance direction, and the restriction portion of the side guide is the reference wall. The feeding device according to claim 1, wherein at least a part is present in a portion that faces directly.   2. The feeding device according to claim 1, wherein there is no roller or guide that is substantially the same as the outer peripheral surface of the conveying roller or a portion that rotates integrally with the conveying roller on a non-reference side with respect to a cross-sectional position of the conveying roller.   The feeding apparatus according to any one of claims 1 to 3, wherein the recording medium stacking portion is inclined in a direction in which the upstream side in the transport direction is high and the downstream side is low.   5. The feeding device according to claim 1, wherein a second reference wall is provided on the upstream side of the reference wall so as to escape slightly from the recording medium from the reference wall.   5. The feeding device according to claim 1, wherein the reference wall escapes in such a direction as to gradually move away from the recording medium toward the upstream side in the transport direction.   The feeding apparatus according to claim 1, further comprising a return unit that returns the remaining recording medium after separation to the stacking unit.   The feeding device according to claim 7, wherein the return means is also provided only on the reference side.   The feeding device according to claim 1, wherein there is an operation mode that does not have or uses a skew feeding function.   The feeding device according to any one of claims 1 to 9, wherein the driving source is the same as the conveyance unit and the recording unit.

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