Patent Publication Number: US-11661294-B2

Title: Recording device

Description:
The present application is based on, and claims priority from JP Application Serial Number 2019-197264, filed Oct. 30, 2019, the disclosure of which is hereby incorporated by reference herein in its entirety. 
     BACKGROUND 
     1. Technical Field 
     The present disclosure relates to a recording device. 
     2. Related Art 
     JP-A-2018-197167 describes an image recording device as an example of a recording device. The image recording device includes a first transportation path along which a medium is transported, a second transportation path branching from the first transportation path, a recording unit that records on a medium on the first transportation path, and a flap located at a junction of the first transportation path and the second transportation path. In the image recording device, a medium travels along the second transportation path when double-sided recording is performed. A medium printed on one side travels along the second transportation path to return to the first transportation path. After the medium returns to the first transportation path, the recording unit records again on the medium. 
     The flap is movable to a first position to open the first transportation path and to a second position to close the first transportation path. The flap is pushed toward the second position by a coil spring. The flap at the second position is moved to the first position when pushed by a medium traveling downstream along the first transportation path. However, the flap is not moved from the second position when pushed by a medium traveling upstream along the first transportation path. Thus, the flap guides the medium to the second transportation path. 
     In the image recording device described in JP-A-2018-197167, a low-rigidity medium may be transported. In such a case, the low-rigidity medium traveling downstream along the first transportation path does not push the flap with enough force to move the flap at the second position to the first position in some cases. Thus, the medium may be stuck on the first transportation path. 
     SUMMARY 
     To solve the above-described problem, a recording device includes a first transportation path along which a medium is transported, a recording unit configured to record on the medium on the first transportation path, a second transportation path branching from the first transportation path, a flap located at a junction of the first transportation path and the second transportation path and configured to be moved to a first position to open the first transportation path and to a second position to close the first transportation path, and a driving section. After the medium passes the junction, the flap is positioned at the second position to come in contact with the medium traveling upstream along the first transportation path and guide the medium to the second transportation path. The flap is moved to the first position by a driving force of the driving section. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a cross-sectional view illustrating an example of a recording device. 
         FIG.  2    is a cross-sectional view illustrating a flap at a first position. 
         FIG.  3    is a cross-sectional view illustrating the flap at a second position. 
         FIG.  4    is a side view illustrating a displacement member at a pushing position. 
         FIG.  5    is a side view illustrating the displacement member at a retracted position. 
         FIG.  6    is a side view schematically illustrating the displacement member. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     Hereinafter, an embodiment of a recording device is described with reference to the drawings. The recording device is, for example, an ink jet printer that ejects an ink, which is an example of a liquid, onto a medium, such as a sheet of paper, to record an image including characters and photographs. 
     As illustrated in  FIG.  1   , a recording device  11  includes a casing  12  and a housing  13 . The recording device  11  includes a recording unit  14 , a support  15 , a transportation path  16 , a transportation unit  17 , a driving section  18 , and a flap  19 . 
     The housing  13  accommodates a medium  99 . The housing  13  of this embodiment houses a cassette  21  that accommodates the medium  99 . The cassette  21  is detachable from the casing  12 . The cassette  21  is in the housing  13  when attached to the casing  12 . The housing  13  accommodates the medium  99  when housing the cassette  21 . In the recording device  11 , the medium  99  in the housing  13  is feedable to the recording unit  14 . 
     The recording unit  14  records on the medium  99 . The recording unit  14  includes, for example, a head  22  and a carriage  23 . The head  22  ejects a liquid toward the medium  99 . The carriage  23  on which the head  22  is mounted scans the medium  99 . In other words, the recording device  11  of this embodiment is a serial printer. The recording device  11  may be a line printer that records one entire row on the medium  99  at one time. The recording unit  14  of this embodiment records on the medium  99  from above. 
     The support  15  faces the recording unit  14 . The support  15  supports the medium  99  sent from the housing  13 . The support  15  supports a portion of the medium  99  to be recorded by the recording unit  14 . The support  15  of this embodiment supports the medium  99  from below. 
     The transportation path  16  is a route along which the medium  99  is transported. The transportation path  16  includes a first transportation path  24  and a second transportation path  25 . In  FIG.  1   , the first transportation path  24  is indicated by a broken line and the second transportation path  25  is indicated by a one-dot chain line. 
     The first transportation path  24  extends from the housing  13  and passes the recording unit  14 . The first transportation path  24  of this embodiment extends through a space between the recording unit  14  and the support  15 . Thus, recording is performed on the medium  99  by the recording unit  14  while the medium  99  is transported along the first transportation path  24 . In other words, the recording unit  14  records on the medium  99  traveling along the first transportation path  24 . The recorded medium  99  is transported along the first transportation path  24  and ejected to the outside of the casing  12 . 
     The first transportation path  24  of this embodiment extends upward from the housing  13  and then extends forward toward the recording unit  14 . In this configuration, the first transportation path  24  of this embodiment includes a curved portion  26  that curves. The curved portion  26  of the first transportation path  24  is positioned between the housing  13  and the recording unit  14 . The orientation of the medium  99  is inverted upside down by being transported along the curved portion  26  such that the surface of the medium  99  facing up in the housing  13  and the surface of the medium  99  facing the recording unit  14  are opposite surfaces. 
     The second transportation path  25  branches from the first transportation path  24 . The second transportation path  25  of this embodiment branches from the first transportation path  24  at a position downstream of the recording unit  14 . In other words, a junction A 1  of the first transportation path  24  and the second transportation path  25  is located downstream of the recording unit  14  on the first transportation path  24 . 
     The second transportation path  25  meets the first transportation path  24  at a position away from the junction A 1 . The second transportation path  25  of this embodiment meets the first transportation path  24  at a position upstream of the recording unit  14 . In other words, a meeting point A 2  where the first transportation path  24  and the second transportation path  25  meet is located upstream of the recording unit  14  on the first transportation path  24 . More specifically described, the meeting point A 2  is located upstream of the curved portion  26  on the first transportation path  24 . 
     The second transportation path  25  extends from the junction A 1  to the meeting point A 2 . The second transportation path  25  of this embodiment is located below the first transportation path  24 . The medium  99  is transported along the second transportation path  25  when double-sided recording is performed. 
     The transportation unit  17  transports the medium  99  along the transportation path  16 . The transportation unit  17  includes, for example, multiple rollers. The transportation unit  17  of this embodiment includes a first transportation roller  31 , a second transportation roller  32 , a first discharge roller  33 , a second discharge roller  34 , and a relay roller  35 . The first transportation roller  31 , the second transportation roller  32 , the first discharge roller  33 , the second discharge roller  34 , and the relay roller  35  rotate to send the medium  99 . 
     The first and second transportation rollers  31  and  32  and the first and second discharge rollers  33  and  34  are located along the first transportation path  24 . The first transportation roller  31 , the second transportation roller  32 , the first discharge roller  33 , and the second discharge roller  34  are located in this order from upstream to downstream of the first transportation path  24 . 
     The first transportation roller  31  is located upstream of the recording unit  14  on the first transportation path  24 . More specifically described, the first transportation roller  31  is located between the recording unit  14  and the meeting point A 2  on the first transportation path  24 . The first transportation roller  31  sends the medium  99  that has been sent from the housing  13  and the medium  99  that has been transported along the second transportation path  25 . The first transportation roller  31  has an outer surface extending along the curved portion  26  of the first transportation path  24 . Thus, a portion of the first transportation path  24  extending along the outer surface of the first transportation roller  31  is the curved portion  26 . 
     The second transportation roller  32  is located upstream of the recording unit  14  on the first transportation path  24 . The second transportation roller  32  is located between the recording unit  14  and the first transportation roller  31  on the first transportation path  24 . The second transportation roller  32  sends the medium  99  that has been sent by the first transportation roller  31 . The second transportation roller  32  of this embodiment comes in contact with the medium  99  from below. 
     The first discharge roller  33  is located downstream of the recording unit  14  on the first transportation path  24 . More specifically described, the first discharge roller  33  is located between the recording unit  14  and the junction A 1  on the first transportation path  24 . The first discharge roller  33  sends the medium  99  that has been sent by the second transportation roller  32 . The first discharge roller  33  of this embodiment comes in contact with the medium  99  from below. 
     The second discharge roller  34  is located downstream of the recording unit  14  on the first transportation path  24 . More specifically described, the second discharge roller  34  is located downstream of the junction A 1  on the first transportation path  24 . The second discharge roller  34  sends the medium  99  that has been sent by the first discharge roller  33 . The second discharge roller  34  of this embodiment comes in contact with the medium  99  from below. 
     The second discharge roller  34  rotates both in a positive direction and a negative direction. The second discharge roller  34  rotates in the positive direction to send the medium  99  downstream along the first transportation path  24 . The second discharge roller  34  rotates in the negative direction, which is a direction opposite the positive direction, to send the medium  99  upstream along the first transportation path  24 . In  FIG.  1   , the positive direction corresponds to a counterclockwise direction and the negative direction corresponds to a clockwise direction. 
     The relay roller  35  is located along the second transportation path  25 . Thus, the relay roller  35  sends the medium  99  along the second transportation path  25 . The relay roller  35  sends the medium  99  from the junction A 1  toward the meeting point A 2  along the second transportation path  25 . The relay roller  35  of this embodiment comes in contact with the medium  99  from below. 
     The driving section  18  is a motor, for example. The driving section  18  of this embodiment is coupled to the second discharge roller  34 . Thus, the second discharge roller  34  is rotated by the driving force of the driving section  18 . 
     As illustrated in  FIGS.  2  and  3   , the flap  19  is located at the junction A 1 . At the junction A 1 , the flap  19  guides the medium  99  traveling along the transportation path  16 . The flap  19  switches the destination of the medium  99  at the junction A 1 . 
     The flap  19  includes a rotation shaft  37 . The flap  19  rotates about the rotation shaft  37 . The rotation shaft  37  is located, for example, between the first transportation path  24  and the second transportation path  25 . In this embodiment, the rotation shaft  37  is located between the first transportation path  24  and the second transportation path  25  in the vertical direction. 
     The flap  19  has a protruded portion  38 . The protruded portion  38  of the flap  19  extends from the rotation shaft  37  toward the junction A 1 . The protruded portion  38  is a portion of the flap  19  located at the junction A 1 . The protruded portion  38  comes in contact with the medium  99  traveling along the transportation path  16 . The flap  19  comes in contact with the medium  99  at the protruded portion  38  to guide the medium  99  at the junction A 1 . 
     The protruded portion  38  has a first surface  41  and a second surface  42 . The first surface  41  of the protruded portion  38  is a surface opposite the second surface  42 . In this embodiment, the first surface  41  of the protruded portion  38  faces up. In this embodiment, the second surface  42  of the protruded portion  38  faces down. 
     The flap  19  is movable to a first position B 1  and to a second position B 2 . The flap  19  of this embodiment turns about the rotation shaft  37  to the first position B 1  or the second position B 2 . 
     As illustrated in  FIG.  2   , the first position B 1  is a position for opening the first transportation path  24 . When the flap  19  is positioned at the first position B 1 , the protruded portion  38  is positioned along the first transportation path  24 . When the flap  19  is positioned at the first position B 1 , the first surface  41  extends along the first transportation path  24 . Thus, when the flap  19  is positioned at the first position B 1 , an upstream section  43  of the first transportation path  24 , which is located upstream of the junction A 1 , and a downstream section  44  of the first transportation path  24 , which is located downstream of the junction A 1 , are joined together at the junction A 1 . This allows the flap  19  at the first position B 1  to guide the medium  99  traveling downstream along the upstream section  43  to the downstream section  44 . 
     As illustrated in  FIG.  3   , the second position B 2  is a position for closing the first transportation path  24 . When the flap  19  is positioned at the second position B 2 , the protruded portion  38  crosses the first transportation path  24 . Thus, the first transportation path  24  is closed at the junction A 1 . The upstream section  43  and the downstream section  44  are disconnected at the junction A 1 . 
     When the flap  19  is positioned at the second position B 2 , the downstream section  44  and the second transportation path  25  are joined together at the junction A 1 . This allows the flap  19  at the second position B 2  to come in contact with the medium  99  traveling upstream along the first transportation path  24  and guide the medium  99  to the second transportation path  25 . The second position B 2  may be referred to as a position for opening the second transportation path  25 . 
     In this embodiment, the front end of the protruded portion  38  of the flap  19  positioned at the second position B 2  is positioned above the front end of the protruded position of the flap  19  positioned at the first position B 1 . In other words, the flap  19  is moved up when the flap  19  is moved to the second position B 2 , and the flap  19  is moved down when the flap  19  is moved to the first position B 1 . 
     As illustrated in  FIGS.  4  and  5   , the flap  19  includes a contact portion  45 . In this embodiment, the contact portion  45  is located at an end of the flap  19  in the axial direction of the rotation shaft  37 . 
     The contact portion  45  has an attachment portion  46 . In this embodiment, the attachment portion  46  of the flap  19  is coaxial with the rotation shaft  37 . The recording device  11  includes a spring  47 . The spring  47  may be a torsion spring or another spring. The spring  47  is attached to the attachment portion  46 . The spring  47  is in contact with the flap  19  at one end. In this embodiment, the spring  47  is in contact with the contact portion  45  at one end. The spring  47  is in contact with a component supporting the flap  19  at the other end. This enables the spring  47  to apply a force to the flap  19 . 
     The spring  47  pushes the flap  19  toward the second position B 2 . In other words, the spring  47  applies a force to the flap  19  to move the flap  19  toward the second position B 2 . The spring  47  of this embodiment pushes the flap  19  up. 
     The recording device  11  includes a displacement mechanism  51 . The displacement mechanism  51  moves the flap  19 . The displacement mechanism  51  of this embodiment moves the flap  19  to the first position B 1 . The displacement mechanism  51  includes, for example, a transmission mechanism  52  and a displacement member  53 . 
     The transmission mechanism  52  transmits a driving force of the driving section  18  to the displacement member  53 . The transmission mechanism  52  of this embodiment includes a first gear  54 , a second gear  55 , and a support shaft  56 . The first gear  54  is disposed on the shaft  57  of the second discharge roller  34 . The first gear  54  rotates together with the shaft  57 . Thus, the first gear  54  is rotated by rotation of the second discharge roller  34 . In this embodiment, the first gear  54  is disposed on an end portion of the shaft  57 . 
     The second gear  55  is meshed with the first gear  54 . Thus, the second gear  55  is rotated by rotation of the first gear  54 . The second gear  55  is disposed on the support shaft  56 . In this embodiment, the second gear  55  is located between the first gear  54  and the flap  19  when viewed in the axial direction of the rotation shaft  37 . 
     The support shaft  56  supports the second gear  55  and the displacement member  53 . The support shaft  56  extends parallel to the shaft  57 . The support shaft  56  is rotated by rotation of the second gear  55 . In other words, the support shaft  56  rotates together with the second gear  55 . In this way, the support shaft  56  is rotated by the driving force of the driving section  18 . The driving force of the driving section  18  is transmitted to the displacement member  53  through rotation of the support shaft  56 . 
     As illustrated in  FIG.  6   , the displacement member  53  includes a shaft hole  61 , a coil spring  62 , a bearing  63 , and an arm  64 . The shaft hole  61  is a hole receiving the support shaft  56 . The inner surface of the shaft hole  61  has a bearing surface  65  and a supporting surface  66 . The bearing surface  65  and the supporting surface  66  as the inner surfaces of the shaft hole  61  face each other. The bearing surface  65  is in contact with the support shaft  56 . The supporting surface  66  is in contact with the coil spring  62 . 
     The coil spring  62  is in the shaft hole  61 . The coil spring  62  is attached to the supporting surface  66  at one end. The coil spring  62  is attached to the bearing  63  at the other end. The bearing  63  is in the shaft hole  61 . The bearing  63  is pushed toward the support shaft  56  by the coil spring  62 . Thus, the bearing  63  is in contact with the support shaft  56 . In other words, the displacement member  53  is fastened to the support shaft  56  by the bearing surface  65  and the bearing  63  sandwiching the support shaft  56 . 
     When the support shaft  56  rotates, the displacement member  53  rotates due to a friction force of the bearing  63  and the bearing surface  65  acting on the support shaft  56 . In other words, the displacement member  53  is moved by a driving force of the driving section  18 . In this embodiment, when the second discharge roller  34  rotates in the positive direction, the displacement member  53  rotates in the negative direction. When the second discharge roller  34  rotates in the negative direction, the displacement member  53  rotates in the positive direction. In this way, the displacement member  53  is moved together with the second discharge roller  34 . 
     When the torque acting on the displacement member  53  is larger than the friction force of the bearing  63  and the bearing surface  65  acting on the support shaft  56 , the bearing  63  and the bearing surface  65  slip on the support shaft  56 . This reduces a load applied to the displacement member  53 . 
     As illustrated in  FIGS.  4  and  5   , the arm  64  extends toward the flap  19 . In this embodiment, the arm  64  extends toward a position above the contact portion  45 . The front end of the arm  64  overlaps the contact portion  45  in the vertical direction. This allows the arm  64  to come in contact with the contact portion  45  when the displacement member  53  is moved. 
     The displacement member  53  is movable to a pushing position C 1  and to a retracted position C 2 . The displacement member  53  of this embodiment is moved to the pushing position C 1  and to the retracted position C 2  by rotation of the support shaft  56 . 
     The pushing position C 1  is where the displacement member  53  pushes the flap  19 . The displacement member  53  at the pushing position C 1  is in contact with the flap  19 . When the displacement member  53  is positioned at the pushing position C 1 , the arm  64  is in contact with the contact portion  45 . 
     When the displacement member  53  is positioned at the pushing position C 1 , the displacement member  53  pushes the flap  19  toward the first position B 1 . In this embodiment, the displacement member  53  pushes the flap  19  down when positioned at the pushing position C 1 . In other words, when the displacement member  53  is positioned at the pushing position C 1 , the arm  64  pushes the contact portion  45  down. At this time, the flap  19  pushed by the displacement member  53  moves to the first position B 1  against the force of the spring  47 . In this way, the flap  19  is pushed by the displacement member  53  to the first position B 1 . In other words, the flap  19  is moved to the first position B 1  by the driving force of the driving section  18 . 
     The retracted position C 2  is where the displacement member  53  is positioned away from the flap  19 . The displacement member  53  at the retracted position C 2  does not push the flap  19 . In this embodiment, the displacement member  53  is not in contact with the flap  19  when positioned at the retracted position C 2 . In other words, when the displacement member  53  is positioned at the retracted position C 2 , the arm  64  is not in contact with the contact portion  45 . Thus, when the displacement member  53  is positioned at the retracted position C 2 , the flap  19  is moved to the second position B 2  by the force of the spring  47 . 
     In this embodiment, the displacement member  53  is moved to the pushing position C 1  when rotated in the negative direction. Thus, when the second discharge roller  34  is rotated in the positive direction, the displacement member  53  is moved to the pushing position C 1 . This moves the flap  19  to the first position B 1 . In this way, when the driving section  18  rotates the second discharge roller  34  to send the medium  99  downstream along the first transportation path  24 , the displacement member  53  is moved by the driving force of the driving section  18  to push the flap  19  toward the first position B 1 . 
     The displacement member  53  is moved to the retracted position C 2  when rotated in the positive direction. Thus, when the second discharge roller  34  is rotated in the negative direction, the displacement member  53  is moved to the retracted position C 2 . This moves the flap  19  to the second position B 2 . In this way, when the driving section  18  rotates the second discharge roller  34  to send the medium  99  upstream along the first transportation path  24 , the displacement member  53  is moved away from the flap  19  by the driving force of the driving section  18 . As described above, the flap  19  is moved to the first position B 1  or to the second position B 2  depending on the rotation direction of the second discharge roller  34 . 
     When the medium  99  is transported downstream along the first transportation path  24 , the first transportation roller  31 , the second transportation roller  32 , the first discharge roller  33 , and the second discharge roller  34  are rotated in the positive direction. At this time, since the second discharge roller  34  is rotated in the positive direction, the flap  19  is moved to the first position B 1 . Thus, the medium  99  is guided along the first transportation path  24  from the upstream section  43  to the downstream section  44 . 
     When recording is performed on both sides of the medium  99 , the medium  99  recorded on one side is transported to the second transportation path  25 . Thus, the second discharge roller  34  starts to rotate in the negative direction when the medium  99  recorded on one side reaches the downstream section  44 . At this time, since the second discharge roller  34  rotates in the negative direction, the flap  19  is moved to the second position B 2 . Thus, the medium  99  traveling upstream along the downstream section  44  is guided from the downstream section  44  to the second transportation path  25 . 
     The medium  99  travels through the second transportation path  25  to return to the first transportation path  24 . When the medium  99  is transported again along the first transportation path  24 , the medium  99  is fed to the recording unit  14  with the surface opposite the recorded surface facing the recording unit  14 . In this way, the recording is performed on both sides of the medium  99 . 
     Next, effects and advantages of the embodiment are described. 
     (1) The flap  19  is moved to the first position B 1  by a driving force of the driving section  18 . In this configuration, when the medium  99  travels downstream along the first transportation path  24 , the medium  99  passes smoothly the junction A 1 , because the flap  19  is moved to the first position B 1  by the driving force of the driving section  18 . In other words, the medium  99  traveling downstream along the first transportation path  24  does not need to push the flap  19  when passes the junction A 1 . This reduces the possibility that the medium  99  will be stuck. 
     (2) The flap  19  is pushed by the displacement member  53  to the first position B 1 . In this configuration, the flap  19  is moved to the first position B 1  by the simple structure. 
     (3) The second discharge roller  34  is rotated by a driving force of the driving section  18 . In other words, the second discharge roller  34  and the displacement member  53  are driven by the same driving section  18 . In this configuration, the structure of the recording device  11  is simpler than that including different driving sections  18  for the second discharge roller  34  and the displacement member  53 . 
     (4) The displacement member  53  is moved by rotation of the support shaft  56 . When the driving section  18  rotates the second discharge roller  34  to send the medium  99  downstream along the first transportation path  24 , the displacement member  53  is moved by the driving force of the driving section  18  to push the flap  19  toward the first position B 1 . In this configuration, the flap  19  is moved to the first position B 1  when the second discharge roller  34  is rotated to send the medium  99  downstream along the first transportation path  24 . This allows the medium  99  traveling downstream along the first transportation path  24  to pass smoothly the junction A 1 . 
     (5) When the driving section  18  rotates the second discharge roller  34  to send the medium  99  upstream along the first transportation path  24 , the displacement member  53  is moved by the driving force of the driving section  18  to be away from the flap  19 . In this configuration, the flap  19  is moved to the second position B 2  by the force of the spring  47  when the second discharge roller  34  rotates to send the medium  99  upstream along the first transportation path  24 . This allows the medium  99  traveling upstream along the first transportation path  24  to be guided to the second transportation path  25 . 
     (6) The flap  19  is pushed toward the second position B 2  by the spring  47 . In this configuration, if the medium  99  transported has high rigidity, the medium  99  is able to push the flap  19  to the first position B 1 . In such a case, the second discharge roller  34  may be rotated in a second direction to send the medium  99  along the second transportation path  25  while the first discharge roller  33  is rotated in a first direction to send the next medium  99  to the downstream section  44 . This increases the speed of handling the medium  99  in the recording device  11 . 
     The embodiment may be modified as below. The embodiment and the following modifications may be combined without creating technical inconsistency. 
     The junction A 1  may be located upstream of the recording unit  14  on the first transportation path  24 . 
     The meeting point A 2  may be located downstream of the junction A 1  on the first transportation path  24 . 
     The second transportation path  25  is not required to be joined to the first transportation path  24  and may be joined to a path different from the first transportation path  24  or a device different from the recording device  11 . 
     The recording device  11  may include a driving section that drives the flap  19  in addition to the driving section  18 . In such a case, the flap  19  is movable independently of the rotation of the second discharge roller  34 . 
     The driving section  18  used to move the flap  19  is not limited to the driving section that rotates the second discharge roller  34  and may be a driving section that rotates a roller different from the second discharge roller  34 . Furthermore, the flap  19  may be moved by a driving force of a driving section for a component other than the transportation unit  17 . 
     The displacement member  53  may push the flap  19  not only to the first position B 1  but also to the second position B 2 . In such a case, the arm  64  may hold the front end of the contact portion  45 . 
     The flap  19  may be moved to the second position B 2  by the driving force of the driving section  18 . In such a case, the spring  47  may be eliminated. 
     The flap  19  may be directly moved by the driving force of the driving section  18 . For example, the driving section  18  may be coupled to the rotation shaft  37 . 
     The displacement member  53  at the pushing position C 1  may be moved to the retracted position C 2  while being in contact with the flap  19 . In such a case, the flap  19  is less vibrated when moved from the first position B 1  to the second position B 2 . 
     The housing  13  may directly accommodate the medium  99  without the cassette  21 . 
     The recording unit  14  is not limited to the ink jet recording unit and may be an electrophotographic recording unit, which applies solid toner particles and then fixes an image on the medium  99  by using a photoreceptor. 
     The liquid ejected from the head  22  is not limited to an ink and may be a liquid state material including particles of functional material dispersed or mixed in a liquid. For example, the head  22  may eject a liquid state material including a dispersed or dissolved electrode material or pixel material, which are used in the production of a liquid crystal display, an electroluminescence display, and a surface emitting display. 
     Hereinafter, technical ideas understood from the above-described embodiment and modifications, and operation and effects thereof are described. 
     (A) A recording device includes a first transportation path along which a medium is transported, a recording unit configured to record on the medium on the first transportation path, a second transportation path branching from the first transportation path, a flap located at a junction of the first transportation path and the second transportation path and configured to be moved to a first position to open the first transportation path and to a second position to close the first transportation path, and a driving section. After the medium passes the junction, the flap is positioned at the second position to come in contact with the medium traveling upstream along the first transportation path and guide the medium to the second transportation path. The flap is moved to the first position by a driving force of the driving section. 
     In this configuration, when the medium travels downstream along the first transportation path, the medium passes smoothly the junction, because the flap is moved to the first position by the driving force of the driving section. In other words, the medium traveling downstream along the first transportation path does not need to push the flap when passes the junction. This reduces the possibility that the medium will be stuck. 
     (B) The recording device may include a displacement member configured to be moved by a driving force of the driving section. The flap may be pushed by the displacement member to the first position. 
     In this configuration, the flap is moved to the first position by the simple structure. 
     (C) The recording device may include a transportation unit configured to transport the medium along the first transportation path and the second transportation path. The junction may be located downstream of the recording unit on the first transportation path. The transportation unit may include a first discharge roller at a position between the recording unit and the junction on the first transportation path and a second discharge roller located downstream of the junction on the first transportation path. The second discharge roller may be rotated by a driving force of the driving section. 
     In this configuration, the structure of the recording device is simpler than that including different driving sections for the second discharge roller and the displacement member. 
     (D) The recording device may include a first gear disposed on a shaft of the second discharge roller and configured to be rotated by rotation of the second discharge roller, a second gear meshed with the first gear, and a support shaft supporting the second gear and the displacement member and configured to be rotated by rotation of the second gear. The displacement member may be moved by rotation of the support shaft. When the driving section rotates the second discharge roller to send the medium downstream along the first transportation path, the displacement member may be moved by the driving force of the driving section to push the flap toward the first position. 
     In this configuration, the flap is moved to the first position when the second discharge roller is rotated to send the medium downstream along the first transportation path. This allows the medium traveling downstream along the first transportation path to pass smoothly the junction. 
     (E) The recording device may include a spring configured to push the flap toward the second position. When the driving section rotates the second discharge roller to send the medium upstream along the first transportation path, the displacement member may be moved by the driving force of the driving section to be away from the flap. 
     In this configuration, the flap is moved to the second position by the force of the spring when the second discharge roller rotates to send the medium upstream along the first transportation path. This allows the medium traveling upstream along the first transportation path to be guided to the second transportation path.