JP5609671B2 - Conveying apparatus and inkjet recording apparatus - Google Patents

Description

  The present invention relates to a conveyance device that conveys a sheet and a medium tray, and an ink jet recording apparatus including the conveyance device.

  There is an ink jet recording apparatus that records an image by ejecting ink droplets onto a sheet transported by a transport apparatus. Some conveying apparatuses include a conveying path configured by a curved portion in which a sheet is bent and conveyed in the conveying direction, and a straight path extending linearly from a downstream end of the bending portion in the conveying direction. Some of these types of transport devices can transport a medium tray on which a recording medium such as a CD or a DVD is placed on a straight path (see, for example, Patent Document 1).

  In the transport device described in Patent Document 1, the straight path is extended beyond the connecting portion with the bending portion. The connecting portion is provided with a movable flap so as not to clog the sheet at the connecting portion. The movable flap is changed in posture to pass the medium tray and to pass the sheet.

JP 2005-144931 A

  If the movable flap is provided, the configuration of the transport device becomes complicated. Although it is conceivable that the sheet can be manually fed from an extended portion of the straight path, the movable flap can be used for each of manual feeding, feeding from a paper feed cassette, etc., and conveyance of the media tray. You have to change your attitude. If the posture of the movable flap is automatically changed, the configuration becomes more complicated.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a mechanism having a simple configuration that allows a sheet and a medium tray to normally pass through a connection portion of a conveyance path. There is to do.

  (1) The conveyance device of the present invention includes a medium tray on which a recording medium is placed, a curved portion in which a sheet is curved from below to be conveyed in a first direction, and the first direction of the curved portion. A first path having a straight line portion extending linearly from the downstream end in the second direction and capable of guiding the sheet and the medium tray, and the second direction from a connection position of the curved portion and the straight portion. The second path extends in the opposite direction and is formed in the opposite direction of the second path through which the medium tray can pass, and the medium tray guided along the second path protrudes out of the apparatus. A first guide member that is disposed above the connection position and that forms the upper guide surface of the linear portion and the second path, the outer guide surface outside the curved portion of the curved portion, and the second A first posture that forms a lower guide surface of the path And and a second guide member provided posture changeable to the second orientation exposing the curved section. The first guide member protrudes downward from the upper guide surface, and a gap through which a sheet inserted from the opening into the second path can pass between a protruding tip and the lower guide surface. A pair of guide pieces formed and spaced apart by a distance larger than the width of the medium tray in a third direction orthogonal to the second direction on the upper guide surface. The guide piece has a first guide surface that guides the sheet conveyed through the curved portion to the upper guide surface at the connection position.

  The medium tray conveyed in the direction opposite to the second direction through the straight line portion passes between the pair of guide pieces. The sheet inserted from the opening into the second path passes through the gap and enters the straight portion of the first path. The sheet conveyed in the first direction through the curved portion is guided by the first guide surface and reaches the upper guide surface at the connection position. The pair of guide pieces can pass the sheet conveyed through the curved portion, the sheet inserted into the second path from the opening, and the medium tray at the connection position. When the sheet or the medium tray is jammed, the posture of the second guide member is changed by the user, and the curved portion is exposed. Since the pair of guide pieces are provided not on the second guide member whose posture can be changed but on the fixed first guide member, the arrangement position can be accurately determined. As a result, the pair of guide pieces can normally pass the sheet and the medium tray at the connection position.

  (2) The position of the tip of the protrusion in the second direction may be located upstream from the downstream end in the first direction of the outer guide surface. The leading end of the sheet in the conveying direction does not contact the leading end of the protrusion of the guide piece, and the sheet can be smoothly guided to the linear portion.

  (3) The pair of guide pieces may have one of a pair of second guide surfaces facing each other in the third direction. The medium tray that passes between the pair of guide pieces is prevented from skewing by contacting the second guide surface.

  (4) The pair of guide pieces may have a third guide surface that guides the sheet inserted into the second path from the opening into the gap. The sheet can be smoothly inserted toward the gap.

  (5) The tip of the protrusion may be a curved surface connecting the first guide surface and the third guide surface. The sheet inserted from the opening can be smoothly guided to the straight portion.

  (6) The second guide member may be rotated about the lower end side as a rotation axis.

  (7) The second guide member may be provided detachably.

  (8) The second guide member may be positioned by contacting the first member in the first posture. Since the second guide member in the first posture is positioned by the fixed first guide member, the outer guide surface of the second guide member is accurately positioned with respect to the first guide surface of the first guide member. Therefore, it is possible to suppress a decrease in conveyance accuracy due to the movable second guide member.

  (9) The present invention provides an ink jet recording apparatus comprising the transport apparatus, a sheet transported through the first path, and a recording head that ejects ink droplets onto a recording medium placed on the medium tray. It may be grasped as.

  In the present invention, the sheet and the medium tray can be normally passed through the connecting portion between the first path and the second path with a simple configuration of a pair of guide pieces.

It is a perspective view of the front side of an inkjet recording device. It is a typical sectional view of a printer part. FIG. 3 is an enlarged view of a part of FIG. 2. FIG. 6 is a bottom view of a first guide member and a medium tray. FIG. 3 is a perspective view of a medium tray and a recording medium. It is a perspective view of the back side of an inkjet recording device. FIG. 6 is an explanatory diagram for explaining conveyance of a sheet. FIG. 5 is an explanatory diagram for explaining conveyance of a medium tray (A) is explanatory drawing for demonstrating manual feeding, (B) is explanatory drawing for demonstrating conveyance of a medium tray.

  Hereinafter, embodiments of the present invention will be described. The embodiment described below is merely an example of the present invention, and it is needless to say that the embodiment can be appropriately changed without departing from the gist of the present invention. In the following description, the direction from the start point to the end point in consideration of the arrow in the vector is expressed as the direction, and the traffic on the line connecting the start point and the end point in the vector without considering the arrow is expressed as the direction. Further, in the following description, the vertical direction 7 is defined with reference to the state where the inkjet recording apparatus 10 is installed (the state shown in FIG. 1), and the side on which the display unit 13 is provided is the front side (front side). A front-rear direction 8 is defined, and a left-right direction 9 is defined when the ink jet recording apparatus 10 is viewed from the front side (front side).

[Inkjet recording apparatus 10]
As shown in FIG. 1, the ink jet recording apparatus 10 has a substantially rectangular parallelepiped outer shape including a lower printer unit 11 and an upper scanner unit 12. The ink jet recording apparatus 10 is a multifunction machine having print, scan, and copy functions. The scanner unit 12 has an arbitrary configuration.

  Control of the printer unit 11 is performed by a control unit (not shown). The control unit is realized by, for example, a microcomputer mounted on a substrate. The control unit controls the operation of the printer unit 11 based on information input from an input unit (not shown) or an external device such as a personal computer, and the recording medium placed on the sheet 14 (FIG. 2) or a medium tray 80 described later. An image is recorded at 84 (FIG. 5). The recording medium 84 is a CD-ROM or DVD-ROM. The sheet 14 corresponds to the sheet of the present invention. The recording medium 84 corresponds to the recording medium of the present invention.

  As shown in FIG. 1, the paper feed cassette 15 is accommodated in the lower part of the printer unit 11 so that it can be pulled out forward from a front opening 19 provided on the front side of the printer unit 11. The paper feed cassette 15 has a flat rectangular parallelepiped shape with an open top. A paper discharge receptacle 18 is provided at the top of the paper feed cassette 15.

  As shown in FIG. 2, the sheet 14 is placed on the bottom 16 of the paper feed cassette 15. The rear wall 17 of the paper feed cassette 15 extends rearward and obliquely upward from the rear end of the bottom portion 16. A sheet 14 delivered by a later-described feeding unit 20 is guided by the rear wall 17 and heads rearward and obliquely upward.

  As shown in FIG. 2, the printer unit 11 includes a feeding unit 20, a transport device 30, a recording unit 40, and a driving unit (not shown). The drive unit includes a plurality of drive motors that are driven and controlled by the control unit, and a drive transmission mechanism that transmits the drive force of the drive motor to the feeding unit 20, the conveyance device 30, the carriage 41 of the recording unit 40, and the like. Prepare.

[Feeding unit 20]
The feeding unit 20 includes a rotating shaft 21 that is rotatably supported by a frame (not shown), an arm 22 that extends rearward and obliquely downward from the rotating shaft 21, and a pair of left and right feeding rollers 23 provided on the arm 22. Prepare. The rotating shaft 21 has a round bar shape extending in the left-right direction 9 and is rotated by a first drive motor (not shown). One end of the arm 22 is rotatably supported by the rotating shaft 21, and the feeding roller 23 is rotatably supported at the other end. The arm 22 is rotated by slidingly contacting a not-shown inclined surface provided in the paper feed cassette 15 when the paper feed cassette 15 is slid in the front-rear direction 8, and the feed roller 23 is moved to the paper feed cassette 15. Press against the accommodated sheet 14. The feeding roller 23 is rotated by the rotation of the rotating shaft 21 transmitted by a plurality of transmission gears 24 and feeds the sheet 14 accommodated in the sheet feeding cassette 15 backward. The sheet 14 sent backward is conveyed by the conveying device 30.

[Conveying device 30]
As shown in FIG. 2, the transport device 30 includes a transport path 31, a transport roller pair 50, and a paper discharge roller pair 54. The conveyance path 31 includes a first path 32 and a second path 33. The first path 32 corresponds to the first path of the present invention. The second path 33 corresponds to the second path of the present invention. The first path 32 includes a curved portion 34 in which the sheet 14 is bent and conveyed in the first direction 36, and a linear portion 35 that linearly extends forward from the downstream end of the curved portion 34 in the first direction 36. Prepare. The first direction 36 corresponds to the first direction of the present invention. The bending portion 34 corresponds to the bending portion of the present invention. The straight line portion 35 corresponds to the straight line portion of the present invention. The forward direction 45 in which the straight portion 35 extends corresponds to the second direction of the present invention. The second path 33 extends linearly rearward from the connection position 37 between the bending portion 34 and the straight portion 35. The connection position 37 corresponds to the connection position of the present invention. The rearward direction 46 in which the second path 33 extends corresponds to the opposite direction of the present invention.

  The curved portion 34 is a space defined by the second guide member 70 disposed on the curved outer side and the inner guide member 100 disposed on the curved inner side. The straight portion 35 is a space defined by a platen 38 disposed above the sheet feeding cassette 15, upper guide members 101 and 102 disposed in front and rear of the platen 38, the first guide member 60, and the like. The second path 33 is a space defined by the first guide member 60 and the second guide member 70. The first guide member 60 and the second guide member 70 will be described in detail later.

  The conveyance roller pair 50 is disposed between the connection position 37 and the platen 38 in the front-rear direction 8. The conveyance roller pair 50 includes a first drive roller 51 disposed on the upper side of the linear portion 35 and a first driven roller 52 disposed on the lower side of the linear portion 35. The first drive roller 51 is rotationally driven by a second drive motor (not shown).

  The paper discharge roller pair 54 is disposed in front of the platen 38. The paper discharge roller pair 54 includes a second drive roller 55 disposed below the straight portion 35 and a second driven roller 56 disposed above the straight portion 35. The second drive roller 55 is rotationally driven together with the first drive roller 51 by a second drive motor (not shown).

  The platen 38 and the second drive roller 55 are movable in the up-down direction 7 between the upper sheet conveying position indicated by a solid line in FIG. 2 and the lower tray conveying position indicated by a broken line in FIG. Is provided. The first driven roller 52 is supported by the platen 38 and can move in the vertical direction 7 together with the platen 38. The platen 38 and the second drive roller 55 are moved in conjunction with the movement of the tray guide 90.

[Tray guide 90]
As shown in FIG. 1, the tray guide 90 is disposed above the front opening 19 of the printer unit 11 and is pulled out by the user from the front side of the printer unit 11. When the tray guide 90 is pulled out by the user, the tray guide 90 is moved from the upper and rear retracted positions indicated by the solid lines in FIG. 2 to the lower and front tray guide positions indicated by the broken lines in FIG. The retracted position shown by the solid line in FIG. 2 is a position when an image is recorded on the sheet 14 and does not hinder the discharge of the sheet 14 from the pair of discharge rollers 54. The tray guide position indicated by a broken line in FIG. 2 is a position for guiding the medium tray 80, and the medium tray 80 (FIG. 5) inserted from the front opening 19 (FIG. 1) is positioned at the nip position of the discharge roller pair 54. To guide.

  The tray guide 90 pulled out from the retracted position to the tray guide position moves the platen 38 and the second drive roller 55 downward. For example, link plates that support the axes of the platen 38 and the second drive roller 55 are provided on both the left and right sides of the platen 38, and the tray guide 90 is engaged with the link plate in the movement between the retracted position and the tray guide position. An engaging portion is provided to move the link plate in the front-rear direction 8 in conjunction with the link plate. For example, the link plate is provided with a first inclined surface that supports the platen 38 and a second inclined surface that supports a holder that supports the shaft of the second drive roller 55. The first inclined surface and the second inclined surface are inclined so as to be lowered rearward. When the tray guide in the retracted position is pulled forward and moved to the tray guide position, the link plate is moved forward, and the platen 38 and the holder are moved downward while sliding on the inclined surface. When the tray guide 90 is returned from the tray guide position to the retracted position and the link plate is moved rearward, the platen 38 and the holder are moved upward while sliding on the inclined surface. When the tray guide 90 is pulled out by the user, the platen 38, the first driven roller 52, and the second drive roller 55 move downward, the linear portion 35 is expanded in the vertical direction 7, and the linear tray 35 has the medium tray 80. Transport is possible.

[Recording unit 40]
As shown in FIG. 2, the recording unit 40 includes a carriage 41 disposed above the platen 38 and a recording head 42 mounted on the carriage 41. The carriage 41 straddles a pair of front and rear guide rails (not shown) supported by the frame, and is supported by the guide rails so as to be movable along the left-right direction 9. The carriage 41 is moved by a third drive motor (not shown) of the drive unit. When the power is supplied, the recording head 42 uses the ink supplied from an ink cartridge (not shown) as ink droplets as ink droplets, and the recording medium 84 (on the sheet 14 conveyed on the platen 38 or the medium tray 80 ( It discharges toward FIG. The recording head 42 corresponds to the recording head of the present invention.

[Media tray 80]
As shown in FIG. 5, the medium tray 80 is a plate-shaped resin molded product. A circular recess 82 into which the recording medium 84 is fitted is provided on the upper surface 81 of the medium tray 80. From the central portion of the bottom surface of the concave portion 82, a circular convex portion 83 that protrudes through a hole 85 formed in the central portion of the recording medium 84 projects. The recording medium 84 is fitted into the concave portion 82 and is conveyed along the linear portion 35 and the second path 33 by the conveying device 30 together with the medium tray 80. The medium tray 80 corresponds to the medium tray of the present invention.

[Second guide member 70]
As shown in FIG. 2, the second guide member 70 is supported by the housing 25 (FIG. 1) so as to be rotatable around a rotation shaft 71 provided at the lower end. The rotation shaft 71 corresponds to the rotation shaft of the present invention. When the second guide member 70 is rotated, the posture changes to a closed posture indicated by a solid line in FIG. 2 and an open posture indicated by a broken line in FIG. As shown in FIG. 6A, the second guide member 70 closes the rear opening 27 of the housing 25 in the closed posture. As shown in FIG. 6B, the second guide member 70 opens the rear opening 27 in the open posture. In FIG. 6B, illustration of components in the housing 25 is omitted. As shown in FIG. 3, the second guide member 70 is in contact with the first guide member 60 in the closed posture and is positioned by the first guide member 60. The second guide member 70 corresponds to the second guide member of the present invention. The closed posture corresponds to the first posture of the present invention. The open posture corresponds to the second posture of the present invention.

  As shown in FIG. 6A, the second guide member 70 includes an insertion port 72 opened with a width W1 wider than the width of the large sheet 14 such as A4 size. That is, the sheet 14 can be manually fed to the insertion port 72. Further, the width W1 is wider than the width W2 (FIG. 5) in the left-right direction of the medium tray 80 described later. That is, the medium tray 80 can pass through the insertion port 72. The insertion port 72 corresponds to the opening of the present invention.

  As shown in FIG. 3, the lower guide surface of the second path 33 is formed by the lower wall surface 74 below the insertion port 72. A part of the upper guide surface of the second path 33 is formed by the upper wall surface 75 of the insertion opening 72. In addition, a guide surface outside the curved portion 34 is formed by the front surface 73 of the second guide member 70. The curved portion 34 is exposed by opening the second guide member 70 to the user. When the sheet 14 or the medium tray 80 is jammed, the user changes the posture of the second guide member 70 in the closed posture to the open posture and exposes the bending portion 34.

  As shown in FIG. 3, the upper part 76 above the insertion opening 72 is shorter in the front-rear direction 8 than the lower part 77, and the upper end of the lower wall surface 74 of the insertion opening 72 is open. The rear end portion of the first guide member 60 is disposed above the front end portion of the lower wall surface 74 of the insertion opening 72.

[First guide member 60]
As shown in FIG. 3, the first guide member 60 has a curved portion such that the rear end portion of the lower surface 61 faces the front end portion of the lower wall surface 74 of the insertion port 72 of the second guide member 70 in the vertical direction 7. 34 and the linear portion 35 are disposed above the connection position 37. The first guide member 60 forms part of the straight guide portion 35 and the upper guide surface of the second path 33 by the lower surface 61. From the rear portion of the lower surface 61 of the first guide member 60, a pair of left and right guide pieces 62 protrude downward. The first guide member 60 corresponds to the first guide member of the present invention. The pair of left and right guide pieces 62 corresponds to the guide piece of the present invention. The left-right direction 9 in which the pair of guide pieces 62 are separated corresponds to the third direction.

[Guide piece 62]
FIG. 4 is a bottom view of the first guide member 60 as viewed from below. As shown in FIG. 4, the separation distance W <b> 3 between the pair of guide pieces 62 is slightly wider than the width W <b> 2 in the left-right direction 9 of the medium tray 80. Therefore, the medium tray 80 can pass between the pair of guide pieces 62.

  As shown in FIG. 3, the projecting dimension H1 of the guide piece 62 from the lower surface 61 of the first guide member 60 is smaller than the height dimension H2 of the insertion port 72 in the vertical direction 7, and the tip of the projecting of the guide piece 62 A gap 66 is formed between 67 and the lower wall surface 74 of the insertion opening 72 of the second guide member 70. The length dimension H3 in the vertical direction 7 of the gap 66 is set such that the protrusion dimension H1 of the guide piece 62 is larger than the thickness of the sheet 14 and smaller than the thickness D (FIG. 4) of the medium tray 80. In other words, the sheet 66 can pass through the gap 66, but the medium tray 80 cannot pass. The gap 66 corresponds to the gap of the present invention.

  As shown in FIG. 3, the guide piece 62 includes a first guide surface 63 that guides the leading end of the sheet 14 that passes through the bending portion 34 in the first direction 36 to the lower surface 61 of the first guide member 60. The first guide surface 63 corresponds to the first guide surface of the present invention. The first guide surface 63 extends in a curved manner toward the lower surface 61 so as to be in contact with the lower surface 61 from the protruding tip (lower end). As shown in FIGS. 7A and 7B, the sheet 14 is guided by the first guide surface 63, so that the entry angle to the lower surface 61 is reduced. That is, the first guide surface 63 prevents the front end of the sheet 14 from colliding with the lower surface of the first guide member 60 when the front end of the sheet 14 in the first direction 36 jumps over the insertion port 72.

  The protruding tip 67 of the guide piece 62 is the upper end of the front surface 73 of the second guide member 70 so that the leading edge of the sheet 14 that has passed through the curved portion 34 in the first direction 36 does not collide with the protruding tip 67 of the guide piece 62. It is located behind 78. The tip 67 is formed as a curved surface that connects the first guide surface 63 and a third guide surface 65 described later. Accordingly, the leading edge of the sheet 14 in the first direction 36 that has passed through the curved portion 34 is in sliding contact with the first guide surface 63 of the guide piece 62, and the sheet 14 is smoothly conveyed.

  Further, as described above, since the second guide member 70 in the closed posture of FIG. 3 is positioned by the first guide member 60, the bending portion with respect to the first guide surface 63 of the first guide member 60. The position of the front surface 73 of the second guide member 70 that forms the outer guide surface 34 can be accurately determined. As a result, it is possible to suppress a decrease in conveyance accuracy due to the second guide member 70 being provided to be openable and closable.

  In addition, as shown in FIG. 4, each guide piece 62 includes one of a pair of left and right second guide surfaces 64 facing in the left-right direction 9. When the medium tray 80 passes through the second path 32 (FIG. 3), the medium tray 80 is prevented from skewing by contacting the second guide surface 64. The second guide surface 64 corresponds to the second guide surface of the present invention.

  Further, as shown in FIG. 9A, each guide piece 62 includes a third guide surface 65 that guides the sheet 14 inserted into the insertion port 72 to the gap 66. The sheet 14 inserted into the insertion port 72 is guided to the gap 66 by the third guide surface 65 and passes through the gap 66 and enters the straight portion 35. The third guide surface 65 corresponds to the third guide surface of the present invention.

[Operation]
As shown in FIG. 7, the sheet 14 accommodated in the paper feed cassette 15 is sent to the curved portion 34 of the first path 32 by the feeding unit 20, passes through the curved portion 34, and the first of the guide pieces 62. It is guided by the guide surface 63 and reaches the straight portion 35. The sheet 14 guided to the lower surface 61 of the first guide member 60 by the guide piece 62 is conveyed by the conveying roller pair 50 in the linear portion 35 until the front end reaches a predetermined position below the recording head 42. Thereafter, the sheet 14 is printed in one line by the recording head 42 that ejects ink droplets while being moved in the left-right direction 9. After printing one line, a line feed that is conveyed by a predetermined conveyance distance by the conveyance roller pair 50 is performed. An image is recorded on the sheet 14 by alternately performing printing of one line and line feed. When the front end reaches the paper discharge roller pair 54, the sheet 14 is conveyed by the conveyance roller pair 50 and the paper discharge roller pair 54. The sheet 14 on which the image is recorded is discharged to the paper discharge receiver 18 by the paper discharge roller pair 54.

  In the manual feeding in which the sheet 14 is inserted into the insertion port 72 from the back of the printer unit 11, the sheet 14 enters the linear portion 35 through the gap 66. As shown in FIG. 9A, even when the sheet 14 is inserted from the upper part of the insertion port 72 and contacts the guide piece 62, the front end of the sheet 14 slides on the third guide surface 65 of the guide piece 62. The contact is guided to the gap 66. The sheet 14 that has entered the straight portion 35 is sandwiched between the conveyance roller pair 50 and is conveyed forward. Thereafter, an image is recorded by the recording head 42 in the same manner as described above, and is then discharged to the discharge receiver 18 by the discharge roller pair 54.

  In the case of image recording on the recording medium 84, the tray guide 90 is pulled out by the user as shown in FIG. When the tray guide 90 is pulled forward, the first driven roller 51, the second drive roller 55, and the platen 38 are moved downward as indicated by broken lines in FIG. . The linear portion 35 is expanded so that the medium tray 80 can pass therethrough. A recording medium 84 is placed on the medium tray 80 and is inserted from the front opening 19 of the printer unit 11. The inserted medium tray 80 is guided to the nip position of the paper discharge roller pair 54 by the tray guide 90 and is conveyed backward by the paper discharge roller pair 54. As shown in FIG. 8B, the medium tray 80 is transported until the rear end portion protrudes rearward from the insertion port 72, and is then moved forward by the transport roller pair 50 and the discharge roller pair 54. Are transported. As shown in FIG. 9B, the medium tray 80 passes between the pair of left and right guide pieces 62 at the insertion port 72. By abutting against the third guide surface 65 of the pair of guide pieces 62, the skew of the medium tray 80 is prevented. The recording medium 84 fitted in the concave portion 82 of the medium tray 80 ejects ink droplets by the recording head 42 when the medium tray 80 is conveyed forward, and an image is recorded. After the image is recorded on the recording medium 84, the medium tray 80 is conveyed forward by the paper discharge roller pair 54 and returned to the tray guide 90.

  When the sheet 14 or the medium tray 80 is jammed, the second guide member 70 is opened by the user, and the curved portion 34 is exposed. The user removes the jammed sheet 14 from the exposed curved portion 34, or moves the jammed media tray 80 backward to remove it from the straight path 35.

[Effect of this embodiment]
The sheet 14 sent out from the sheet feeding cassette 15 is guided to the lower surface 61 of the first guide member 60 by the first guide surface 63 of the guide piece 62, and the leading end of the sheet 14 in the first direction 36 is the first guide member 60. A collision with the lower surface 61 is prevented. Further, since the distance between the pair of guide pieces 62 is wider than the width of the medium tray 80 in the left-right direction 9, the conveyance of the medium tray 80 is not hindered by the guide pieces 62. Further, since the guide piece 62 is provided so as to form a gap 66 through which the sheet 14 can pass between the guide wall 62 and the lower wall surface 74 of the insertion opening 72 of the second guide member 70, the sheet 14 from the insertion opening 72. Can be manually fed. Further, since the guide piece 62 is provided not on the second guide member 70 that can be opened and closed but on the fixed first guide member 60, the arrangement position can be accurately determined. As a result, the pair of left and right guide pieces 62 can normally pass the sheet 14 and the medium tray 80 at the connection position 37 of the curved portion 34, the straight portion 35, and the second path 33.

  In addition, since the second guide surface 64 is provided on the guide piece 62, it is possible to prevent the medium tray 80 from being skewed.

  Further, since the third guide surface 65 is provided on the guide piece 62, the sheet 14 can be smoothly inserted into the insertion port 72 in manual feeding.

  Further, as described above, the protruding tip 67 of the guide piece 62 is formed in a curved surface connecting the first guide surface 63 and the third guide surface 65 and is in the first direction of the outer guide surface of the bending portion 34. 36 is formed behind the upper end of the front surface 73 of the second guide member 70 that forms the downstream end. Accordingly, the leading edge of the sheet 14 that has passed through the curved portion 34 in the first direction 36 is in sliding contact with the first guide surface 62, and the sheet 14 is smoothly conveyed at the insertion port 72.

  The second guide member 70 in the closed posture is positioned in contact with the first guide member 60, and forms a second guide surface of the curved portion 34 with respect to the first guide surface 63 of the guide piece 62. The front surface 73 of the member 70 can be accurately positioned. As a result, it is possible to suppress a decrease in conveyance accuracy due to the opening and closing of the second guide member 70.

[Modification]
In the above-described embodiment, the example in which the second guide member 70 is rotatably provided has been described. However, the second guide member 70 may be provided detachably. For example, the printer unit 11 is provided with a lock mechanism that holds the second guide member 70 attached to the housing 25 in a closed posture. The user removes the second guide member 70 from the housing 25 by operating an operation lever or the like provided in the lock mechanism.

  In the above-described embodiment, the example in which the upper guide surface of the second path 33 is formed by the upper wall surface 74 of the insertion opening of the second guide member 70 and the lower surface 61 of the first guide member 60 has been described. The upper guide surface of the second path 33 may be formed only by the lower surface 61 of the one guide member 60. In this configuration, the second guide member is provided with a front surface that forms the outer guide surface of the curved portion 34 and an upper surface that forms the lower guide surface of the second path 33. The second guide member is attached to the rear opening 27 of the printer unit 11 so that the second guide member can be opened and closed in the same manner as in the embodiment, or detachable in the same manner as the modification.

9 ... Left-right direction (third direction)
DESCRIPTION OF SYMBOLS 10 ... Inkjet recording device 14 ... Sheet 30 ... Conveying device 32 ... 1st path | route 33 ... 2nd path | route 34 ... Curve part 35 ... Straight line part 36 ... 1st Orientation 37: Connection position 42: Recording head 60 ... First guide member 61 ... Lower surface (upper guide surface)
62 ... guide piece 63 ... first guide surface 64 ... second guide surface 65 ... third guide surface 66 ... gap 70 ... second guide member 71 ... rotating shaft 72 ... Insertion opening (opening)
73 ... Front (outer guide surface)
74 ... Lower wall surface (lower guide surface)
75 ... Upper wall surface (upper guide surface)
80 ... medium tray 84 ... recording medium (recording medium)

Claims (10)

A medium tray on which a recording medium is placed;
A curved portion in which the sheet is curved from below to be conveyed in the first direction, and extends linearly from the downstream end in the first direction of the curved portion in the second direction, and guides the sheet and the medium tray. A first path having possible straight portions;
A second path extending from the connection position of the curved portion and the straight portion in the direction opposite to the second direction, and through which the medium tray can pass;
An opening formed in the opposite direction of the second path;
A first guide member that is disposed on the upper side of the connection position and forms an upper guide surface of the linear portion and the second path;
A second guide member provided to be changeable in a first posture that forms an outer guide surface on the outer side of the curved portion and a lower guide surface of the second path, and a second posture that exposes the curved portion. And,
The first guide member is
Projecting downward from the upper guide surface, a gap is formed between the projecting tip and the lower guide surface, through which the sheet inserted from the opening into the second path can pass, and the upper guide A pair of guide pieces spaced apart by a distance wider than the width of the medium tray in a third direction orthogonal to the second direction on the surface;
The guide piece state, and are not having a first guide surface for guiding a sheet conveyed to the curved portion to the upper guide surface at the connecting position,
The conveying device is located upstream of the first direction downstream end of the outer guide surface at a position of the protruding tip of the guide piece in the second direction . A medium tray on which a recording medium is placed;
A curved portion in which the sheet is curved from below to be conveyed in the first direction, and extends linearly from the downstream end in the first direction of the curved portion in the second direction, and guides the sheet and the medium tray. A first path having possible straight portions;
A second path extending from the connection position of the curved portion and the straight portion in the direction opposite to the second direction, and through which the medium tray can pass;
An opening formed in the opposite direction of the second path;
A first guide member fixed to the upper side of the connection position and forming an upper guide surface of the linear portion and the second path;
A second guide member provided to be changeable in a first posture that forms an outer guide surface on the outer side of the curved portion and a lower guide surface of the second path, and a second posture that exposes the curved portion. And,
The first guide member is
Projecting downward from the upper guide surface, a gap is formed between the projecting tip and the lower guide surface, through which the sheet inserted from the opening into the second path can pass, and the upper guide A pair of guide pieces spaced apart by a distance wider than the width of the medium tray in a third direction orthogonal to the second direction on the surface;
The conveying device, wherein the guide piece has a first guide surface that guides the sheet conveyed through the curved portion to the upper guide surface at the connection position. The transport device according to claim 2 , wherein a position of the tip of the protrusion in the second direction is located upstream of the downstream end in the first direction of the outer guide surface. 4. The transport device according to claim 1, wherein the pair of guide pieces has one of a pair of second guide surfaces facing each other in the third direction. 5. 5. The transport device according to claim 1, wherein the pair of guide pieces have a third guide surface that guides a sheet inserted into the second path from the opening to the gap. 6. The transport apparatus according to claim 5 , wherein a tip of the protrusion is a curved surface connecting the first guide surface and the third guide surface. The second guide member, the conveying device according to claim 1 in which is pivoted a lower side as the pivot shaft 6. The second guide member, the conveying device according to any one of claims 1 to 6 in which provided detachably. The second guide member, said in the first orientation, conveying device according to any one of claims 1 to 8 in which is positioned by contacting with the first guide member. A transport apparatus according to any one of claims 1 to 9 ;
An ink jet recording apparatus comprising: a sheet transported through the first path; and a recording head that ejects ink droplets onto a recording medium placed on the medium tray.

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