JP2016155666A - Recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording device which suppresses jamming of medium on a lower stream side of a route switching member.SOLUTION: A route switching member 60 provided between a branch transportation path and a connection path includes second ribs 63A, 63B, 63C for bending both side parts in width direction X of a sheet that is transported from the branch transportation path to the connection path toward a recording surface side. Since both side parts in the width direction X of the sheet is bent toward the recording surface side by the second ribs 63A, 63B, 63C, a rigidity is imparted to an end part on the connection path side of the sheet, for suppressing jamming of the sheet.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a recording apparatus such as an ink jet printer.

  2. Description of the Related Art Conventionally, as a type of recording apparatus, an ink jet printer that performs printing (recording) by ejecting ink from a line-type head (recording unit) onto a medium such as paper has been known (for example, Patent Documents). 1).

  In such a recording apparatus, in which both sides of the medium can be recorded, in addition to a medium supply path (the paper feeding system conveyance path in Patent Document 1) for conveying the medium from a paper cassette or the like to the recording unit, a switchback type Medium supply path. That is, as a medium supply path for reversing the medium, the medium having one surface recorded by the recording unit is carried into the switchback path, and the medium reversely conveyed from the switchback path is reversed to the medium An inversion path is provided to return upstream of the recording unit.

  As described above, the recording apparatus includes a plurality of medium supply paths. On the downstream side of the recording unit, at a position where a plurality of medium supply paths intersect, a path switching member that guides the medium having one surface recorded by the recording unit to the switchback path is disposed, The path switching member switches from the switchback path to the reverse path to guide the medium to the reverse path side.

JP 2010-131859 A

  By the way, when the medium is guided from the switchback path to the reversing path by the path switching member, when the medium moves from the path switching member to the reversing path, the leading end of the medium facing the moving direction is the connecting path of the reversing path. There is a case where it abuts on a (path connected to the path switching member). This is particularly likely to occur due to ink swelling, particularly when the medium is recorded with ink on one side of the medium. If the medium is conveyed as it is, the leading edge of the medium may be bent or bent toward the connection diameter side of the reversing path, which may cause a jam.

  An object of the present invention is to provide a recording apparatus that suppresses a jam of a medium on the downstream side of a path switching member.

  A recording apparatus that solves the above problem includes a recording unit that records an image on a medium, and a first path through which the medium passes through the recording unit, and a recording medium that passes through the recording unit and is carried in from the first path. A second path for switching back the medium that has been switched, a third path for transporting the medium switched back in the second path to the upstream side of the recording unit in the first path, the second path, and the Provided between the third path and switching between a state in which the medium is allowed to be transferred from the first path to the second path and a state in which the medium is allowed to be transferred from the second path to the third path. A path switching member, wherein the second path side of the third path is disposed so as to have an obtuse angle with respect to an extension line of the second path on the third path side, and the path switching member From the second route A pressure is applied to the opposite side of the recording surface of the medium to both sides in the medium width direction intersecting the conveying direction of the medium conveyed to the third path so that the recording surface side of the medium is A curving suppression unit that suppresses convex curving is provided.

  According to this configuration, the curving suppression unit suppresses the curving that causes the recording surface side of the medium to protrude in the transport direction of the medium by applying pressure to the surface opposite to the recording surface. The jam of the medium on the downstream side can be suppressed.

  In this case, the bending suppression part is in contact with the medium in the path switching member from below, and the downstream part of the bending suppression part is formed higher than the upstream part. preferable.

  According to this configuration, after the curving suppressor comes into contact with the medium from below, the both sides of the medium in the medium width direction are curved to the recording surface side at the downstream part higher than the upstream part. Can do. As a result, the medium can be smoothly transferred from the second path to the third path.

Moreover, it is preferable that the path switching member includes a path switching member main body extending in the medium width direction and a curving suppression member as a curving suppression unit provided integrally with the path switching member main body.
According to this configuration, it is possible to easily configure the bending suppression unit.

  The path switching member includes a path switching member main body extending in the medium width direction and a curving suppression member constituting the curving suppression unit, and the curving suppression member is a medium with respect to the path switching member main body. It may be provided so as to be movable in the width direction.

  According to this configuration, pressure is applied to both sides of the medium in the medium width direction by moving the curving suppression member in the medium width direction so as to correspond to media having different lengths in the medium width direction. As a result, it is possible to suppress a curve in which the recording surface side of the medium is convex in the conveyance direction of the medium.

Further, it is preferable that the recording apparatus is configured to be able to transport a medium having a plurality of widths, and the bending suppressing member is configured to correspond to the plurality of widths.
According to this configuration, even for media having different widths, the curving suppression member corresponding to the different widths applies pressure to the surface opposite to the recording surface so that the recording surface side of the medium is Since curving that is convex in the transport direction is suppressed, jamming of the medium can be suppressed.

Moreover, it is preferable that the said curvature suppression part is further comprised with the member which contacts the said medium from upper direction.
According to this configuration, since the medium can be stretched by the member that presses from below and the member that contacts from above, the warping after printing of the medium is effectively suppressed. As a result, it is possible to suppress the curvature of the recording surface side of the medium in the opposite direction.

Moreover, the said curve suppression member may have a rake part which has the slope which curves the side part of the medium width direction of the said medium.
According to this configuration, the scooping portion having the inclined surface exerts pressure on the surface opposite to the recording surface and suppresses the bending of the recording surface side of the medium in the conveying direction of the medium. Jam can be suppressed.

Further, the bending suppression unit may be a wind pressure applying unit that bends both sides of the medium with wind pressure.
According to this configuration, it is possible to suppress jamming of the medium by applying pressure to the both sides of the medium by the wind pressure and imparting rigidity to the end of the medium on the connection path side.

1 is a perspective view of a recording apparatus according to an embodiment. FIG. 2 is a schematic structural diagram of a recording apparatus. The structure schematic of the branch part of a 1st path | route, a 2nd path | route, and a 3rd path | route. The structure schematic of the branch part of a 1st path | route, a 2nd path | route, and a 3rd path | route. The perspective view of a path | route switching member. The side view at the time of seeing from the branch conveyance path side from the intermediate part of the width direction X in a path switching member to one end part. Sectional drawing of a path | route switching member. Sectional drawing of a path | route switching member. The principal part perspective view of the recording device which has a path | route switching member. The principal part perspective view of the recording device which shows the effect | action of a path | route switching member. The principal part perspective view of a recording device at the time of employ | adopting the path | route switching member of a comparative example. FIG. 10 is a perspective view of a main part of a recording apparatus in which a medium is guided to a third path by a path switching member of a comparative example. FIG. 10 is a perspective view of a main part of a recording apparatus in which a medium is guided to a third path by a path switching member of a comparative example. FIG. 10 is a perspective view of a main part of a recording apparatus that guides a medium to a third path by a path switching member of a comparative example.

Hereinafter, an embodiment of a recording apparatus embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, the recording apparatus 11 has a substantially rectangular parallelepiped shape that is long in the vertical direction Z as a whole, and includes a printer unit 12 as an example of a storage unit, and a scanner unit 13 disposed on the printer unit 12. And an automatic paper feeder 14 disposed on the scanner unit 13. Next to the scanner unit 13 on the printer unit 12, an operation unit 15 for performing various operations of the recording apparatus 11 is provided.

  As shown in FIG. 2, the printer unit 12 includes a medium conveyance path 20 as an example of a conveyance path through which a sheet P as an example of a medium is conveyed, and a plurality of rollers (roller pairs). And a transport unit 21 that transports P along the medium transport path 20. Further, in the printer unit 12, a support base 22 that supports the paper P from below the vertical direction Z, and a line-type recording unit 23 that prints (records) an image on the paper P supported by the support base 22. Is housed.

  When the direction orthogonal to the paper surface (that is, the thickness direction of the medium) in FIG. 2 is the width direction X of the paper P, the printer unit 12 supports the paper P with the direction orthogonal to the width direction X as the transport direction. It is conveyed along the upper and medium conveying paths 20. That is, the width direction X is a direction perpendicular to both the thickness direction of the medium and the transport direction as the medium width direction.

  The recording unit 23 includes a line head as a liquid ejecting head capable of ejecting ink simultaneously over substantially the entire area in the width direction X intersecting the transport direction of the paper P, and the paper P transported on the support base 22. An image (character, drawing, pattern, etc.) is printed by ejecting ink from the upper side in the vertical direction Z and attaching it.

  The printed paper P is transported through the medium transport path 20 by a pair of paper discharge rollers 24 and other plural transport roller pairs 25 that are rollers that are examples of components that rotate in contact with the paper P in the transport unit 21. The paper is discharged from a medium discharge port 26 provided at the downstream end of the medium transport path 20 in a discharge direction Y indicated by a white arrow. Then, the paper P discharged from the medium discharge port 26 falls on the mounting table 27 disposed on the upper side in the vertical direction Z of the recording unit 23 and is stacked in a stacked state as indicated by a two-dot chain line in FIG. Is done.

  As shown in FIG. 2, in the present embodiment, the medium transport path 20 includes a medium discharge path 34 that transports the paper P from the recording unit 23 to the medium discharge port 26, and a medium supply path that supplies the paper P to the recording unit 23. And have. In addition, the medium supply path includes a first medium supply path 31, a second medium supply path 32, and a third medium supply path 33 as a third path.

  The medium discharge path 34 includes a curved path 34A that is curved with the recording surface of the paper P printed by the recording unit 23 inside, while the paper P printed by the recording unit 23 is conveyed to the medium discharge port 26, and A straight path 34B through which the sheet P is conveyed in one direction from the curved path 34A toward the medium discharge port 26 is provided.

  In the first medium supply path 31, the paper P inserted from the insertion port 36 exposed by opening the cover 35 provided on one side surface of the printer unit 12 is conveyed to the recording unit 23. In other words, the paper P inserted into the insertion slot 36 is pressed against the first drive roller 38a by the hopper 37, and is conveyed by the rotational drive of the first drive roller 38a, so that the first drive roller 38a and the first driven roller 38b are in contact with each other. After being sandwiched therebetween, the sheet is conveyed toward the recording unit 23 by the rotational drive of the first drive roller 38a.

  In the second medium supply path 32, the paper P placed in a stackable manner on a paper cassette 39 that can be inserted into and removed from the bottom of the printer unit 12 is conveyed to the recording unit 23. That is, the paper P placed in a stacked state on the paper cassette 39 is fed out by the pickup roller 40 and separated one by one by the separation roller pair 41, and then the second drive roller 42a. It is sandwiched between the second driven roller 42b and conveyed toward the recording unit 23 by the rotational drive of the second drive roller 42a.

  In the present embodiment, the path after the first medium supply path 31 and the second medium supply path 32 merge and the path through which the medium passes through the recording unit 23 corresponds to the first path. The first path of the present embodiment includes the first medium supply path 31 and the second medium supply path 32, so that a plurality of sheets P having different widths can be conveyed. The first path in the present embodiment includes an alignment roller pair 47, a roller pair 48, and a paper discharge roller pair 24.

  In the third medium supply path 33, when performing double-sided printing for printing on both sides of the sheet P (paper side), the sheet P on which one side of the sheet has been printed by the recording unit 23 is recorded again. It is conveyed to the section 23. That is, a branch path 49 that branches from the medium discharge path 34 by the operation of the branch mechanism 43 provided in the middle of the medium discharge path 34 is provided downstream of the recording unit 23 in the transport direction of the paper P. A branch conveyance path 44 is connected to the branch path 49. Further, the branch transport path 44 is provided with a branch transport path roller pair 45 </ b> A and 45 </ b> B that is capable of both normal rotation and reverse rotation on the downstream side of the branch mechanism 43. The branch conveyance path 44 is an example of a second path. The lower rollers of the branch conveyance path roller pairs 45 </ b> A and 45 </ b> B are constituted by axial drive rollers extending in the width direction X of the paper P.

  Then, the sheet P on which the sheet surface on one side is printed is transported by the pair of branch transport path rollers 45A and 45B that normally rotate to the branch transport path 44 from the recording unit 23 side toward the mounting table 27 side during double-sided printing. Is done. At this time, the sheet P transported to the branch transport path 44 does not come into contact with the sheet P placed in a stacked state on the mounting table 27 when a part Pe on the leading end side in the transport direction jumps out from the medium discharge port 26. The pop-out position is set as follows.

  Thereafter, the sheet P conveyed to the branch conveyance path 44 is reversely conveyed on the branch conveyance path 44 from the placing table 27 side to the recording unit 23 side by the reverse conveyance path roller pairs 45A and 45B. At this time, the reversely transported paper P is transported to the third medium supply path 33 via the path switching member 60 and transported toward the recording unit 23 by the plurality of transport roller pairs 25.

  Here, as shown in FIG. 3, a plurality of ribs M are arranged at predetermined intervals in the width direction X in the connection path 71 to the branch conveyance path 44 in the third medium supply path 33 as the third path. Is arranged in. That is, the rib M is provided so as to be able to contact the surface opposite to the recording surface of the conveyed paper P. The medium-side guide surface of the rib M intersects the extension line L extending from the branch conveyance path 44 toward the third medium supply path 33 so as to form an obtuse angle. By providing two sets of branch conveyance path roller pairs 45A and 45B, the sheet P can easily get over the slope of the connection path 71.

  The detailed configuration of the path switching member 60 will be described later. By the conveyance to the third medium supply path 33, the sheet P is reversed so that the non-printed sheet surface faces the recording unit 23, and is sandwiched between the third driving roller 46a and the third driven roller 46b. Then, it is conveyed toward the recording unit 23 by the rotational drive of the third drive roller 46a.

The reversing path of the present embodiment includes a branch conveyance path 44 and a third medium supply path 33.
The sheet P conveyed toward the recording unit 23 through each medium supply path is conveyed to the alignment roller pair 47 disposed on the upstream side in the conveyance direction of the recording unit 23, and then the alignment roller pair 47 whose rotation has stopped. The tip hits. Then, the inclination of the sheet P with respect to the conveyance direction is corrected (skewed) according to the state where the sheet P hits the alignment roller pair 47. Then, the sheet P whose inclination is corrected is aligned and conveyed to the recording unit 23 side by the subsequent rotational driving of the alignment roller pair 47.

  The sheet P conveyed to the recording unit 23 side by the alignment roller pair 47 is disposed on the upstream side in the conveyance direction of the sheet P with respect to the recording unit 23 or on the downstream side in the conveyance direction. The paper is conveyed while facing the recording unit 23 by the discharged paper roller pair 24 and the conveying roller pair 25. Ink is ejected from the opposed recording unit 23 onto the conveyed paper P to perform printing. In the present embodiment, among the roller pairs 24, 25, 41, 45 A, 45 B, 47, 48 disposed at a plurality of locations on the medium transport path 20 (that is, a plurality of locations in the transport direction of the paper P), the paper feed Rollers constituting the roller pair 48 (hereinafter referred to as “paper feed rollers”) are rollers arranged at positions closest to the recording unit 23.

  As shown in FIG. 2, the printer unit 12 includes a liquid storage unit 50 that stores ink to be supplied to the recording unit 23. That is, the liquid storage unit 50 supplies the stored ink to the recording unit 23 through an ink supply path (not shown) configured by a tube or the like, and the recording unit 23 ejects the supplied ink to form an image on the paper P. Etc.

  The liquid reservoir 50 is mounted with ink cartridges 51, 52, 53, and 54 as liquid reservoirs that store a plurality of types of ink (here, four colors), and the ink cartridges 51, 52, 53, and 54, respectively. The frame body 55 is configured. Each of the ink cartridges 51, 52, 53, 54 has a substantially rectangular parallelepiped shape having a longitudinal direction, and is attached to a box-like frame body 55 having an opening on one side so that the longitudinal direction can be inserted and removed. The opening of the frame body 55 is covered with an opening / closing cover 56 (see FIG. 1) provided on the lower side of the operation unit 15 in the printer unit 12, and is exposed when the opening / closing cover 56 is opened.

(Route switching member 60)
The route switching member 60 will be described.
As shown in FIG. 5, the path switching member 60 includes a path switching member main body 61 extending in the width direction X, a plurality of first ribs 62 respectively provided for the path switching member main body 61, and a plurality of A plurality of second ribs 63A, 63B, and 63C are provided. The second ribs 63 </ b> A, 63 </ b> B, and 63 </ b> C are examples of a bending suppression unit and a bending suppression member for suppressing a curved state with a convex recording surface side. These ribs act on the opposite side of the recording surface of the sheet P by applying pressure to the opposite side of the recording surface of the sheet P to both sides in the width direction of the sheet P conveyed to the third path. It functions as a curving suppression member that suppresses curving with the surface side convex. As shown in FIGS. 7 and 8, the path switching member main body 61 includes a flat plate portion 61a, a side wall 61b bent in an L shape at an end portion of the flat plate portion 61a on the branch conveyance path 44 side, and a branch conveyance from the side wall 61b. And a projecting portion 61c projecting toward the path 44 side. The upper surface of the projecting portion 61c has a slanted slope 61d so as to descend downward toward the tip.

  A reinforcing member 68 extending in the longitudinal direction is integrally connected to the lower surface of the flat plate portion 61a. The reinforcing member 68 has a side wall 68a fixed to the lower surface of the flat plate portion 61a, and a side wall 68b formed integrally with the side wall 68a and bent downward on the side of the side wall 61b opposite to the branching conveyance path 44.

  The plurality of first ribs 62 are integrally formed with respect to the path switching member main body 61 over the entire length direction thereof, that is, in the width direction X with a predetermined interval. The number and arrangement interval of the first ribs 62 are set so as to guide stably even when media having different lengths in the width direction X are conveyed.

  As shown in FIG. 8, in the first rib 62, the side of the branch conveyance path 44 from the side wall 61 b has a tip that protrudes further toward the branch conveyance path 44 than the protrusion 61 c, The upper surface formed higher than the upper surface is a guide slope 62a. Further, in the first rib 62, the side of the first rib 62 from the side wall 61b to the anti-branch conveyance path 44 is formed higher than the flat plate portion 61a, and its upper surface has a guide plane 62b that is parallel or substantially parallel to the plane of the flat plate portion 61a. Accordingly, the connection portion between the guide slope 62a and the guide plane 62b is bent.

  The plurality of second ribs 63 </ b> A, 63 </ b> B, 63 </ b> C are integrally provided at predetermined portions in the width direction X (longitudinal direction) with respect to the path switching member main body 61. This predetermined part will be described later.

  As shown in FIG. 7, in the second ribs 63A, 63B, 63C, the side of the branch conveyance path 44 from the side wall 61b is further protruded toward the branch conveyance path 44 than the protrusion 61c of the path switching member main body 61. The upper surface formed higher than the upper surface of the protruding portion 61 c is a first guide slope 64. The first guide slope 64 is formed in an oblique shape so as to be the same as or substantially the same as the guide slope 62a.

  Further, in the second ribs 63A, 63B, 63C, the side opposite to the side branch conveyance path 44 from the side wall 61b is formed higher than the first guide slope 64 and the guide plane 62b (see FIG. 8), and the upper surface thereof is the second. A guide slope 65 is formed. The second guide slope 65 of the present embodiment is slanted more gently than the first guide slope 64, but may be the same slope as the first guide slope 64, or the first guide slope You may incline so that it may stand up from the slope 64. FIG. The 1st guide slope 64 is an example of the site | part of the upstream of a curve suppression part, and the 2nd guide slope 65 is an example of the downstream part of a curve suppression part. The second guide slope 65 is an example of a rake portion.

Next, the arrangement positions of the second ribs 63A, 63B, 63C with respect to the path switching member main body 61 will be described.
When the medium transport path 20 transports a plurality of types of paper P having different lengths in the width direction X, the intermediate portion in the width direction X of the paper P matches the intermediate portion in the width direction X of the medium transport path 20. It is configured so that it can be transported. Then, the path switching member of the path switching member 60 is positioned so that the second ribs 63A, 63B, and 63C are positioned at the positions where the two ribs 63A, 63B, and 63C guide the both sides in the width direction X of the paper P that is transported through the medium transport path 20. It is provided for each of the main bodies 61.

  Here, in the present embodiment, as shown in FIG. 5, the paper P transported in the medium transport path 20 is a paper Pa, Pb, whose length in the width direction X has a size relationship of Pa> Pb> Pc. Let Pc. As shown in FIG. 5, a pair of second ribs 63A are provided on both sides in the width direction X of the path switching member main body 61, and both sides in the width direction X of the paper Pa are curved toward the recording surface side to guide each. To do.

  Further, as shown in FIG. 5, a plurality of the second ribs 63B are provided at a pair of locations that are slightly closer to the intermediate portion side than the second ribs 63A on both sides in the width direction X of the path switching member main body 61. The second rib 63B group guides each side of the sheet Pb in the width direction X by curving it toward the recording surface.

  Further, as shown in FIG. 5, a pair of the second ribs 63C are provided at positions slightly offset from the second rib 63B group toward the intermediate side on both sides of the path switching member main body 61, respectively. Are guided by curving both sides in the width direction X toward the recording surface.

  As shown in FIG. 4, three sets of grips including a pair of gripping arms 67 a and 67 b protruding toward the anti-branch conveyance path 44 are provided at both ends and an intermediate portion of the path switching member main body 61 of the path switching member 60. Each arm is formed. As shown in FIGS. 4, 9, and 10, each pair of gripping arms 67 a and 67 b grips the fixed support shaft 69 that is horizontally supported by the printer unit 12 so as to be swingable in the vertical direction. As a result, the path switching member 60 can swing up and down about the fixed support shaft 69 as shown in FIGS.

  As shown in FIG. 5, a plurality of pairs of first ribs 62 adjacent to each other, between the tip portions of the pair of first ribs 62, between the tip portions of the second rib 63 </ b> B and the first rib 62, and the tips of the pair of second ribs 63 </ b> B. A plurality of serrated rollers 70 are rotatably supported between the sections.

  In addition, as shown in FIG. 3, when the paper P does not pass through the branch path 49, the path switching member 60 is lowered by its own weight and the jagged roller 70 is locked to the bottom surface of the concave portion 49 a of the branch path 49. It arrange | positions so that it may be located in the closed position which closes the channel | path 49. FIG. When the path switching member 60 moves to the closed position, movement of the paper P between the branch conveyance path 44 and the connection path 71 of the third medium supply path 33 is allowed. Further, when the path switching member 60 is guided to the branch path by the branch mechanism 43 and pushed by the paper P passing through the branch path 49, the path switching member 60 moves upward to allow the paper P to pass through the branch path 49. Has been.

  As shown in FIG. 3, in the connection path 71, an upper guide 74 is provided in the printer unit 12 so as to be positioned above the path switching member 60. On the upper guide 74, a plurality of jagged rollers 75 are juxtaposed in the width direction X of the paper P and are rotatably supported. Further, as shown in FIG. 6, when the path switching member 60 is located at the closed position, the respective jagged rollers 75 are arranged so as to be located between the first ribs 62 and between the second ribs 63B, respectively. The sheet P can be brought into contact with the recording surface side. 6 is an example, and is not limited. For example, the arrangement between the second rib 63A and the first rib 62, the second rib 63B and the first rib 62, and the second You may arrange | position so that it may each be located between the rib 63C and the 1st rib 62.

  The serrated roller 75 is an example of a member that comes into contact with the medium from above. The member that comes into contact with the medium from above is not limited to a serrated roller, and may be, for example, a roller or a rib. In the present embodiment, a bending suppressing portion is configured by the serrated roller 75 and the second ribs 63A, 63B, and 63C (curving suppressing member).

  As described above, each of the serrated rollers 75 is disposed so as to be positioned above the first ribs of the path switching member 60 and the like, so that the cock ring is set with the ribs in the width direction X with respect to the paper P. (Wavy phenomenon) is formed. That is, in the paper P, the cockling is such that the portions supported by the ribs of the path switching member 60 are crests, and the portions not supported by the ribs (that is, the portions where the knurled roller 75 abuts) are valleys. Is made. As a result, the paper P can be held back, so that the warp of the paper P after printing is effectively suppressed. By forming this cockling (rippling phenomenon), it is possible to suppress the curvature of the recording surface side of the paper P in a reverse direction.

  Further, as shown in FIG. 3, an upper guide 76 is provided in the printer unit 12 so as to be positioned above the downstream end portion of the rib M of the connection path 71. A plurality of jagged rollers 77 are juxtaposed on the upper guide 76 in the width direction X of the paper P and are rotatably supported.

  The reason why the jagged rollers 75 and 77 are provided in the connection path 71 is as follows. By providing a pair of branch conveyance path roller pairs 45A and 45B, back tension may be applied when the paper P is sent downstream (reverse path side) in some conveyance situation. In this case, without the jagged rollers 75 and 77, the recording surface side of the paper P may come into full contact with the upper guides 74 and 76 of the third medium supply path 33 to cause jamming, or the recording surface may be soiled. However, the presence of the serrated rollers 75 and 77 can reduce this possibility.

(Operation of the embodiment)
The operation of the recording apparatus 11 configured as described above will be described.
When double-sided printing is performed, the paper P that has been printed on one side by the recording unit 23 is guided to the branch path 49 by the branch mechanism 43 on the downstream side of the recording unit 23, and the path switching member 60 in the closed position is moved. After being moved up, it is transported to the branch transport path 44. When the movement of the sheet P to the branch conveyance path 44 is completed, the path switching member 60 moves to the closed position again because the upward pressing of the sheet P is released.

  Thereafter, the sheet P conveyed to the branch conveyance path 44 is reversely conveyed from the stage 27 side of the branch conveyance path 44 to the recording unit 23 side by the pair of reverse conveyance path rollers 45A and 45B. At this time, when the reversely transported paper P passes through the path switching member 60, each end in the width direction X is a first guide of at least one of the second ribs 63A, 63B, and 63C. Curved upward by the slope 64 and the second guide slope 65. FIG. 10 illustrates a case where the paper P is the paper Pa, and a state in which both sides in the width direction X of the paper Pa are curved toward the recording surface side is illustrated by a thick two-dot chain line.

  Thus, when both sides in the width direction X of the paper Pa are curved toward the recording surface side, rigidity is imparted to the end of the paper Pa (P) on the connection path 71 side (conveyance direction side). Even when the conveyance direction side that has passed through the path switching member 60 abuts against the guide surface of the rib M of the connection path 71, the occurrence of jamming is suppressed by suppressing the bending or bending of the paper P toward the rib M side. The sheet Pa (P) that has been suppressed and passed through the connection path 71 is conveyed to the recording unit 23. In particular, the driving rollers of the branch conveyance path roller pairs 45 </ b> A and 45 </ b> B are configured by axial driving rollers extending in the width direction X of the paper P. For this reason, since the driving roller and the driven roller form a cock ring (wavy phenomenon) on the paper P to give rigidity, it is not possible to suppress the curvature of the recording surface side of the paper P from being convex. Technology is effective.

(Comparative example)
Next, a comparative example will be described with reference to FIGS.
As shown in FIG. 11, the path switching member 100 of the comparative example is obtained by omitting the second ribs 63 </ b> A, 63 </ b> B, 63 </ b> C in the configuration of the path switching member 60. Parts that are the same as or correspond to the components that are provided are assigned the same reference numerals.

  FIG. 13 shows a state in which the path switching member 100 is swingably mounted on the fixed support shaft 69 in the recording apparatus 11 described in the above embodiment, and the paper P indicated by a thick two-dot chain line is a path switching member. 100 indicates a guided state.

  Further, FIG. 13 shows that in the path switching member 100, the leading end Ps in the transport direction of the paper P hits the guide surface of the rib M, and starts to be curved and convex on the recording surface side in the transport direction. FIG. 14 shows a state in which the leading end Ps in the conveyance direction of the paper P is further curved by the guide surface of the rib M toward the surface opposite to the recording surface. In this way, in the comparative example, the second ribs 63A, 63B, and 63C are omitted, and both sides of the paper Pa in the width direction X are not curved toward the recording surface side, so that the paper Pa (P) is conveyed. There is a case where a jam occurs without giving rigidity to the direction side (connection path 71 side).

As described above, according to the embodiment described in detail, the following effects can be obtained.
(1) In the recording apparatus 11, the branch conveyance path 44 (second path) side of the third medium supply path 33 (third path) is an extension of the third medium supply path 33 (third path) side of the branch conveyance path 44. It arrange | positions so that it may have an obtuse angle with respect to a line. Further, the path switching member 60 has both sides in the medium width direction intersecting with the conveyance direction of the paper P (medium) conveyed from the branch conveyance path 44 (second path) to the third medium supply path 33 (third path). On the other hand, it has second ribs 63A, 63B, 63C (curvature suppressing portions) that suppress the bending of the recording surface side of the paper P by applying pressure to the surface opposite to the recording surface of the paper P. . For this reason, the second ribs 63A, 63B, and 63C (curvature suppressing portions) are subjected to pressure by the side portions in the width direction X of the paper, so that rigidity is imparted to the end of the paper on the connection path 71 side, The jam of the paper P can be suppressed.

  (2) In the recording apparatus 11, the second ribs 63A, 63B, 63C (curvature suppressing unit) come into contact with the paper P (medium) in the path switching member 60 from below, and the second ribs 63A, 63B, 63C ( The second guide slope 65 (downstream part) of the curving suppression portion is formed higher than the first guide slope 64 (upstream part). For this reason, after the second ribs 63A, 63B, 63C (curvature suppressing portions) contact with the paper P (medium) from below, the second ribs 63A, 63B, 63C (curvature suppressing portion) contact the paper P (medium) at the downstream portion higher than the upstream portion. Both sides in the medium width direction can be curved toward the recording surface. As a result, the medium can be smoothly transferred from the second path to the third path.

  (3) The path switching member 60 includes a path switching member main body 61 that extends in the medium width direction, and second ribs 63A, 63B, and 63C (curving) that are integrally provided in the path switching member main body 61. It is preferable to include a suppressing member. According to this configuration, it is possible to easily configure the bending suppression unit.

  (4) The recording apparatus 11 is configured to be able to transport a plurality of widths of paper P (medium), and second ribs 63A, 63B, and 63C (curvature suppressing members) are configured corresponding to the plurality of widths. As a result, even for media having different widths, the second ribs 63A, 63B, and 63C (curvature suppressing members) corresponding to the different widths exert pressure on the surface opposite to the recording surface to cause the paper P Therefore, the jamming of the medium can be suppressed.

  (5) The curving suppression unit is configured to further include a serrated roller 75 (member) that comes into contact with the paper P (medium) from above. According to this configuration, the paper P (medium) can be given a waist by the second ribs 63A, 63B, 63C (curving suppression member) pressed from below and the serrated roller 75 (member) contacting from above. For this reason, warping after printing of the paper P (medium) is effectively suppressed. As a result, it is possible to suppress the curvature of the recording surface side of the paper P (medium) in a reverse direction.

  (6) In the recording apparatus 11, the path switching member 60 includes a path switching member main body 61 extending in the medium width direction, a second rib 63 </ b> A serving as a curving suppression unit provided integrally with the path switching member main body 61, 63B, 63C (bending suppression member) is included. With this configuration, it is possible to easily configure the bending suppression unit.

  (7) In the recording apparatus 11, the curving suppression member is a scooping portion having a curved surface at the side in the width direction X of the paper P (medium). With this configuration, by scooping the side portion in the width direction X of the paper P (medium), pressure is applied to the surface opposite to the recording surface so that the recording surface side of the medium is convex in the conveyance direction of the medium. Since the bending is suppressed, the jam of the medium can be suppressed.

In addition, embodiment of this invention is not limited to the said embodiment, You may change as follows.
In the above-described embodiment, the first path is a path after the first medium supply path 31 and the second medium supply path 32 are merged and the medium is allowed to pass through the recording unit 23. Either the supply path 31 or the second medium supply path 32 may be omitted. In this case, the first path includes a path on the upstream side of the recording unit and a path on the downstream side of the recording unit. The upstream path preferably includes at least the alignment roller pair 47, for example.

  In the above embodiment, the medium is described as paper or the like, but a medium other than “paper” may be used as long as the medium is a sheet. For example, a film-like member, a resin sheet, an aluminum foil, or the like can be used as the medium.

  In the above-described embodiment, a recording apparatus having a line head has been described. However, the present invention is not limited to this. For example, dots that form dots on a medium by ejecting ink from the head to the medium while moving the head in the moving direction. The present invention may be embodied in a recording apparatus that alternately performs a forming operation and a transport operation for transporting a medium in the transport direction.

In the recording apparatus, when the paper P is transported by the transport unit 21, the component that rotates in contact with the paper P may be an endless belt instead of a roller.
In the embodiment, the recording apparatus may be a liquid ejecting apparatus that ejects or ejects liquid other than ink.

  In the embodiment, the second ribs 63A, 63B, and 63C are integrally formed with the path switching member main body 61. However, in the width direction X, the second ribs 63A, 63B, and 63C may be movably provided. . For example, the second ribs 63 </ b> A, 63 </ b> B, 63 </ b> C are provided with non-circular through holes, and are disposed so as to be relatively movable in the width direction X in the through holes with respect to the path switching member main body 61. In this case, the portion of the path switching member main body 61 that penetrates the through hole has a cross-sectional shape similar to the shape of the through hole. It cannot be rotated around. Further, a fitting groove is provided in the lower surface of the second ribs 63A, 63B, 63C instead of the through hole, and the path switching member body 61 is relatively movable in the width direction X with respect to the fitting groove. In addition, the path switching member main body 61 may be provided so as not to rotate.

  According to this configuration, the second ribs 63A, 63B, and 63C (curvature suppressing members) are moved in the medium width direction so as to correspond to the sheets P having different lengths in the medium width direction. By applying pressure to both sides in the medium width direction of P, it is possible to suppress a curve that causes the recording surface side of the sheet P to be convex in the conveyance direction of the medium.

In the above-described embodiment, the bending suppression member is the second rib 63A, 63B, 63C, and the rib is used. However, a block body may be used.
In the above embodiment, the second ribs 63A, 63B, and 63C are provided, but one or two of the second ribs 63A, 63B, and 63C may be omitted. In this case, pressure can be applied to both sides of the medium that can be accommodated by the remaining second rib.

  In the above-described embodiment, the second ribs 63A, 63B, and 63C are provided. However, the second ribs 63A, 63B, and 63C are all omitted, and at positions corresponding to both sides in the width direction X of the path switching member main body 61. A wind pressure applying unit such as a blower may be provided. With this configuration, it is possible to curb both sides of the medium in the medium width direction to the recording surface side by the wind pressure of the wind pressure application unit, and to impart rigidity to the end of the connection path side of the medium, thereby suppressing jamming of the medium.

11 ... Recording device, 12 ... Printer section, 13 ... Scanner section,
DESCRIPTION OF SYMBOLS 14 ... Automatic paper feeder, 15 ... Operation part, 20 ... Medium conveyance path, 21 ... Conveyance part,
22 ... support stand, 23 ... recording section, 24 ... pair of discharge rollers,
25 ... pair of transport rollers, 26 ... medium outlet, 27 ... mounting table,
31 ... 1st medium supply path, 32 ... 2nd medium supply path,
33: Third medium supply path (third path), 34: Medium discharge path, 34A: Curved path,
34B ... straight path, 35 ... cover, 36 ... insertion slot, 37 ... hopper,
38a ... first driving roller, 38b ... first driven roller, 39 ... paper cassette,
40 ... Pickup roller, 41 ... Separation roller pair,
42a ... second driving roller, 42b ... second driven roller, 43 ... branching mechanism,
44 ... branch conveyance path (second path),
45A, 45B ... branch conveyance path roller pair, 46a ... third drive roller,
46b ... 3rd driven roller, 47 ... Alignment roller pair, 48 ... Roller pair,
49 ... Branch, 50 ... Liquid reservoir,
51, 52, 53, 54 ... ink cartridge, 55 ... frame,
56 ... Open / close cover, 60 ... Path switching member, 61 ... Path switching member body,
61a ... Flat plate part, 61b ... Side wall, 61c ... Projection part, 61d ... Slope,
62 ... 1st rib, 62a ... Guide slope, 62b ... Guide plane,
63A, 63B, 63C ... 2nd rib (curvature suppression part),
64 ... 1st guide slope, 65 ... 2nd guide slope, 68 ... reinforcement member,
67a, 67b ... gripping arms, 68a, 68b ... side walls,
69 ... Fixed support shaft, 70 ... Giza roller, 71 ... Connection path,
74 ... Upper guide, 75 ... Giza roller, 76 ... Upper guide, 77 ... Giza roller,
M: Rib, P, Pa, Pb, Pc: Paper (medium).

Claims (8)

A recording unit that records an image on a medium, and a first path through which the medium passes through the recording unit;
A second path for switching back the medium that has passed through the recording section and carried in from the first path;
A third path for conveying the medium switched back in the second path to the upstream side of the recording unit in the first path;
A state that is provided between the second path and the third path, and that allows the medium to be carried from the first path to the second path; and transports from the second path to the third path. In a recording apparatus having a path switching member that switches between permissible states,
The second path side of the third path is arranged to have an obtuse angle with respect to an extension line of the second path on the third path side,
The path switching member is configured to apply pressure to a surface opposite to the recording surface of the medium with respect to both sides in the medium width direction intersecting the conveyance direction of the medium conveyed from the second path to the third path. A recording apparatus comprising: a curving suppression unit that suppresses curving that causes the recording surface side of the medium to be convex. The curving suppression unit contacts the medium in the path switching member from below,
The recording apparatus according to claim 1, wherein the downstream portion of the bending suppressing portion is formed higher than the upstream portion.   The path switching member includes a path switching member main body extending in the medium width direction, and a curving suppression member as a curving suppression unit provided integrally with the path switching member main body. The recording device described.   The path switching member includes a path switching member main body extending in the medium width direction and a curving suppression member constituting the curving suppression section, and the curving suppression member has a medium width with respect to the path switching member main body. The recording apparatus according to claim 2, wherein the recording apparatus is provided so as to be movable in a direction. The recording apparatus is configured to be capable of transporting a plurality of width media,
The bending suppression member is configured corresponding to the plurality of widths,
The recording apparatus according to claim 3 or 4.   The recording apparatus according to claim 1, wherein the bending suppression unit further includes a member that contacts the medium from above.   The recording apparatus according to claim 3, wherein the bending suppression member includes a rake portion having a slope that curves a side portion of the medium in the medium width direction.   The recording apparatus according to claim 1, wherein the bending suppression unit is a wind pressure applying unit that bends both sides of the medium with wind pressure.