Patent Publication Number: US-8540333-B2

Title: Recording apparatus

Description:
BACKGROUND 
     1. Technical Field 
     The present invention relates to a recording apparatus including a transport roller that applies a transport force to each of a first soft recording medium such as plain paper, and the like and a holding tray in which a second hard recording medium such as a CD-R, or the like, is held, a recording unit that performs a desired recording onto the recording medium transported to a recording performing zone by the transport roller, a discharge roller that is located downstream of the recording unit and includes a discharge driving roller and a discharge driven roller that apply a discharge force to the first recording medium in a discharge direction. 
     2. Related Art 
     An ink jet printer will hereinafter be set forth as an exemplary recording apparatus. The ink jet printer may selectively perform recording onto both of a soft recording medium not having rigidity, such as paper, film, and the like, and a hard recording medium having rigidity, such as optical disks, for example, a CD-R, a DVD-R, or the like. When recording is performed onto the hard recording medium, a dedicated elongated holding tray that is provided as a separate accessory for the printer is used, or an ink jet printer in which a holding tray is incorporated in a main body of the printer as shown in JP-A-2005-59584 is used. The holding tray is provided with a set recess in which the recording medium such as a CD-R, or the like will be set. 
     When recording is performed onto the hard recording medium, a discharge driven roller of a discharge roller is at a release position spaced from a discharge driving roller. 
     The discharge driven roller, is located at the release position in the recording with the holding tray as described above, but is moved from the release position to a nip position when recording onto the soft recording medium such as plain paper. In the recording apparatus that incorporates the holding tray therein, the holding tray is moved from a set position to a received position to be withdrawn from a transport path that transports the soft recording medium such as plain paper, and the like, and then the discharge driven roller is moved from the release position to the nip position. 
     If a user mistakenly puts the hard recording medium such as a CD-R, or the like on the holding tray when the holding tray begins to move from the set position to the received position, the holding tray can move toward the received position with the hard recording medium deviated from the set recess. 
     In such a case, the holding tray may reach the predetermined received position, but the hard recording medium remains on the transport path. Then, the discharge driven roller moves from the release position to the nip position, so that the hard recording medium is pinched between the discharge driving roller and the discharge driven roller, thereby causing damage to the surface of the hard recording medium or difficulty in removing the pinched hard recording medium. 
     Otherwise, for the recording apparatus that does not incorporate the holding tray therein, the aforementioned problem also occurs in the event that a user mistakenly puts the hard recording medium such as a CD-R, or the like on the transport path just before the discharge driven roller is moved from the release position to the nip position. 
     SUMMARY 
     An advantage of some aspects of the invention is to provide a recording apparatus that may smoothly discharge a hard recording medium such as a CD-R, or the like outside a main body of the recording apparatus without carelessly damaging the hard recording medium. 
     In accordance with a first aspect of the invention, a recording apparatus includes: a transport roller that applies a transport force to each of a first recording medium and a holding tray in which a second recording medium is held; a recording unit that performs a desired recording onto the recording medium transported to a recording performing zone by the transport roller; a discharge roller that is located downstream of the recording unit and includes a discharge driving roller and a discharge driven roller that apply a discharge force to the first recording medium in a discharge direction; a release mechanism that switches the discharge driven roller between a nip position, at which the discharge driven roller is brought into contact with the discharge driving roller when the first recording medium is transported, and a release position, at which the discharge driven roller is spaced from the discharge driving roller when the holding tray is transported; and a controller that controls the transport roller, the discharge roller, and the release mechanism, wherein the controller controls the discharge driving roller to be rotated a predetermined amount in the discharge direction before moving the discharge driven roller from the release position to the nip position. Here, ‘a predetermined amount’ in “the discharge driving roller to be rotated a predetermined amount in the discharge direction” is a rotation amount that is needed to discharge the hard recording medium remaining on the transport path outside the apparatus. This is the same as in a recording apparatus relating to a second aspect of the invention below. 
     According to this aspect, even in the event that a hard recording medium remains on the transport path, the discharge driving roller is rotated a predetermined amount in the discharge direction before the discharge driven roller is moved from the release position to the nip position, thereby providing the following effect. Namely, before the discharge driven roller is moved from the release position to the nip position, the remaining hard recording medium is subjected to a discharge force caused by a contact friction force from the discharge driving roller that defines the transport path on its lower side, so that the remaining hard recording medium is smoothly discharged outside the apparatus main body. Therefore, it is possible to smoothly discharge the hard recording medium such as a CD-R, or the like outside the apparatus main body without carelessly damaging the hard recording medium. 
     In accordance with a second aspect of the invention, a recording apparatus includes: a holding tray that is incorporated in a main body of the recording apparatus and reciprocates between a received position and a set position; a transport roller that applies a transport force to each of a first recording medium and the holding tray in which a second recording medium is held; a recording unit that performs a desired recording onto the recording medium transported to a recording performing zone by the transport roller; a discharge roller that is located downstream of the recording unit and applies a discharge force to the first recording medium in a discharge direction; and a controller that controls the transport roller, the discharge roller and a release mechanism, wherein the controller controls the discharge roller to be rotated a predetermined amount in a discharge direction after reversing the transport roller to move the holding tray from a set position to the received position. 
     Here, the received position is a position at which the holding tray incorporated in the main body of the recording apparatus is located when not used. That is, the received position is located upstream of the transport roller inside the main body of the recording apparatus. When the holding tray is located at the received position, the transport path of the first soft recording medium such as paper, and the like is open to allow the first recording medium to be transported for recording. The set position is a position at which the holding tray is located when the second recording medium is set on the holding tray. In other words, the set position is located downstream of the transport roller in front of the main body of the recording apparatus. 
     According to this aspect, the controller controls the discharge roller to be rotated a predetermined amount in a discharge direction after reversing the transport roller to move the holding tray to the received position, so that even in the event that the hard recording medium remains on the transport path, the remaining hard recording medium is subjected to the discharge force from the discharge roller to be smoothly discharged outside the apparatus main body before transportation of the first recording medium begins for recording. Therefore, it is possible to prevent the first soft recording medium such as paper, and the like from being carelessly deformed. 
     When the apparatus includes the release mechanism of the first aspect, the controller controls the discharge roller to be rotated a predetermined amount in a discharge direction after reversing the transport roller to move the holding tray to the received position, so that even in the event that the hard recording medium remains on the transport path as the first aspect, the remaining hard recording medium is subjected to the discharge force from the discharge driving roller to be smoothly discharged outside the apparatus main body before the discharge roller begins to move from the release position to the nip position. Therefore, the apparatus may smoothly discharge a hard recording medium such as a CD-R, or the like outside the apparatus main body without carelessly damaging the hard recording medium. 
     A third aspect of the invention is a recording apparatus according to the second aspect, and comprises a supplementary transport mechanism that moves the holding tray between the received position and a position at which the transport force of the transport roller is applied to the holding tray, wherein the supplementary transport mechanism releases the power transmission to the supplementary transport mechanism when the discharge roller is rotated a predetermined amount in the discharge direction. 
     According to this aspect, the holding tray can be prevented from being moved in a transport direction which has no relation with the operation for discharging the hard recording medium remaining on the transport path outside the apparatus main body, thereby suppressing abrasion of the respective constituent members such as the holding tray or the guide arm connected to the holding tray, and the like. 
     A fourth aspect of the invention is a recording apparatus according to any one of the first to third aspects, wherein the discharge roller interlocks with the transport roller. 
     According to this aspect, a separate driving motor for rotating the discharge roller is not necessary, and it is possible to reduce the number of components, to reduce manufacturing cost, and to achieve a size and weight reduction of the apparatus through effective use of the driving motor for the transport roller. 
     In accordance with a fifth aspect of the invention, a recording apparatus includes: a holding tray that is incorporated in a main body of the recording apparatus and reciprocates between a received position and a set position; a transport roller that applies a transport force to each of a first recording medium and the holding tray in which a second recording medium is held; a recording unit that performs a desired recording onto the recording medium transported to a recording performing zone by the transport roller; a discharge roller that is located downstream of the recording unit and includes a discharge driving roller and a discharge driven roller that apply a discharge force to the first recording medium in a discharge direction; a release mechanism that switches the discharge driven roller between a nip position, at which the discharge driven roller is brought into contact with the discharge driving roller when the first recording medium is transported, and a release position, at which the discharge driven roller is spaced from the discharge driving roller when the holding tray is transported; a supplementary transport mechanism that moves the holding tray between the received position and a position at which the transport force of the transport roller is applied to the holding tray; and a controller that controls the transport roller, the discharge roller, the release mechanism, and the supplementary transport mechanism, wherein the discharge driving roller interlocks with the transport roller, and wherein, when a material to be discharged is located on a transport path, the controller allows the material to be extruded by operating the transport roller and the supplementary transport mechanism in a predetermined direction to move the holding tray to the received position, followed by operating the transport roller and the supplementary transport mechanism in a reverse direction to the predetermined direction. 
     According to this aspect, as the second aspect, even in the event that the hard recording medium remains on the transport path, the remaining hard recording medium is subjected to the discharge force from the discharge driving roller to be smoothly discharged outside the apparatus main body before the discharge driven roller begins to move from the release position to the nip position. In particular, according to this aspect, it is possible to use not only the friction force of the discharge driving roller but also the extrusion force of the holding tray as the discharge force to discharge the remaining hard recording medium, so that the hard recording medium may be reliably discharged outside the apparatus main body. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements. 
         FIG. 1  is a perspective view showing an interior structure of an ink jet printer. 
         FIG. 2  is a side sectional view approximately showing the interior structure of the ink jet printer. 
         FIG. 3  is a perspective view showing a recording medium transport device when a holding tray is located at a set position. 
         FIG. 4  is a plan view showing the recording medium transport device when a hard recording medium deviates. 
         FIG. 5  is a plan view showing the recording medium transport device when a holding tray is moving. 
         FIG. 6  is a plan view showing the recording medium transport device when a hard recording medium remains on a transport path. 
         FIG. 7  is a plan view showing the recording medium transport device in another state in which a hard recording medium remains on a transport path. 
         FIG. 8  is a plan view showing the recording medium transport device when a hard recording medium is being discharged. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     Hereinafter, exemplary embodiments of a recording apparatus of the invention will be described. An ink jet printer will be described in brief as an exemplary embodiment of the recording apparatus of the invention with reference to the accompanying drawings. 
       FIG. 1  is a perspective view showing an interior structure of an ink jet printer, and  FIG. 2  is a side sectional view approximately showing the interior structure of the ink jet printer with a hard recording medium remaining on a transport path. The ink jet printer is a multiple function type ink jet printer that is provided at an upper portion thereof with an image reading apparatus (not shown), i.e., a scanner. The ink jet printer incorporates a holding tray therein and may perform recording onto both of a soft recording medium P, i.e., a first recording medium, such as paper, film, and the like, and a hard recording medium Q, i.e., a second recording medium, such as optical disks including a CD-R, a DVD-R, or the like. 
     The ink jet printer  1  includes a printer main body  2  that has a rectangular shaped case composed of relatively flat outer surfaces. A feed cassette  11  is detachably mounted on a front middle lower portion of the printer main body  2  to accommodate a number of the soft recording media P in a stacked state. The feed cassette  11  is provided at an upper portion thereof with a slide type stacker  47  that stacks the soft recording media P after recording is performed. 
     The feed cassette  11  is located at the start position of a transport path for the soft recording media P, and the soft recording media P accommodated in the feed cassette  11  are sequentially sent one by one from the uppermost sheet to a recording medium transport device  5  described below through a U-shaped reversal path  50  by a automatic feed apparatus  3 . A terminal end of the U-shaped reversal path  50  is connected to a start end of a transport path  56  that guides the hard recording medium Q set in a holding tray  55  received in a space provided as a received position within the U-shaped reversal path  50  and the soft recording medium P fed through the U-shaped reversal path  50  to a recording performing zone  51  and the exterior of the printer main body  2 . 
     The recording performing zone  51 , is provided at a lower portion thereof with a transport guide  39  having a platen  38  that supports the lower side of the transported soft recording medium P to define a gap PG between the bottom of a recording head  42  and the lower side of the transported soft recording medium P. Meanwhile, the recording performing zone  51  is provided at an upper portion thereof with a recording unit  4 , and the recording unit  4  is provided with a recording head  42  which discharges color inks through a nozzle opening formed in the lower side thereof, and with a carriage  40  which may be guided by a carriage guide shaft  41  with the recording head  42  mounted on the lower side thereof to reciprocate in a scan direction B crossing the transport direction A. 
     Embodiments 
     The structure of the ink jet printer  1  according to this embodiment will be described in detail with reference to the accompanying drawings. 
       FIG. 3  is a perspective view showing a recording medium transport device when a hard recording medium is being dislocated from a set recess in a state that a holding tray is located at a set position in the embodiment of the invention,  FIG. 4  is a plan view showing the same state as  FIG. 3  of the recording medium transport device,  FIG. 5  is a plan view showing that the holding tray of the recording medium transport device is moving in the reverse direction,  FIG. 6  is a plan view showing that the holding tray of the recording medium transport device is moved to a received position wherein the hard recording medium is located on a discharge driving roller of a transport path,  FIG. 7  is a plan view showing that the holding tray of the recording medium transport device is moved to the received position wherein a portion of the hard recording medium is pinched by the transport roller, and  FIG. 8  is a plan view showing that the hard recording medium remaining on the transport path of the recording medium transport device is discharged. 
     A recording medium transport device  5  of the ink jet printer of this embodiment includes the holding tray  55  incorporated in the printer main body  2  and having a set recess  71  formed to hold a hard recording medium Q; a transport roller  34  that includes a transport driving roller  35  and a transport driven roller  36  that pinch the hard recording medium Q together with the holding tray  55  or directly pinch the soft recording medium P to apply a transport force to the hard recording medium Q and the soft recording medium P in a transport direction A and a reversal direction D; a discharge roller  43  that includes a discharge driving roller  44  and a discharge driven roller  45  that pinch directly the soft recording medium P after recording to discharge it outside the printer main body  2 ; a release mechanism  6  that moves the discharge driven roller  45  between a nip position, at which the discharge driven roller  45  is brought into contact with the discharge driving roller  44  and a release position, at which the discharge driven roller  45  is spaced from the discharge driving roller  44 ; and a controller  81  that controls the transport roller  34 , the discharge roller  43 , and the release mechanism  6 . 
     The holding tray  55  has a member having a shallow rectangular flat board shape. The holding tray  55  is provided with a set recess  71  to set the hard recording medium Q at a widthwise middle position slightly adjacent to the front side of the holding tray  55 , and a zipper  72  to hold the hard recording medium Q set to the center of the holding tray  55 . The hard recording medium Q that can be set to the holding tray  55  may be applicable to any available disk of, for example, 12 cm or 8 cm diameter including various optical disks such as a CD-R, a CD-RW, a DVD-R and a DVD-RW, blue ray disks that have attracted attention recently as next generation optical disks, disks that will be developed later, and the like. 
     The holding tray  55  has two guide arms  74 L,  74 R disposed near the left and right corners of a rear end thereof to expand a moving stroke of the shallow holding tray  55 . In addition, the holding tray  55  has a lock  68  disposed near the rear right corner of an upper side thereof, as shown in  FIGS. 5 to 7 . The lock  68  engages with a pinion  69  that is placed facing at a nearby position to move the holding tray  55  located at the received position until it is transferred to the transport roller  34 , and to move the holding tray  55  that is spaced from the nip position of the transport roller  34  until it is received at the received position. 
     Force for rotating the pinion  69  is obtained from the transport driving roller  35 , wherein the rotation of the transport driving roller  35  is transmitted to a gear train  66  through a clutch mechanism  7  to rotate the pinion  69  at the terminal end of the gear train  66 . The lock  68 , pinion  69 , clutch mechanism  7  and gear train  66  constitute a supplementary transport mechanism  67  that performs supplementary transport of the holding tray  55  between the received position and the nip position of the transport roller  34 . 
     The transport roller  34  is constituted by a pair of nip rollers, that is, the transport driving roller  35  supported by a roller driving shaft  35   a,  which has a driving pulley  80  mounted at one end thereof and the clutch mechanism  7  mounted at the other end thereof and which is elongated in a width direction B (which is the same as symbol B indicating the scan direction), and a plurality of short transport driven rollers  36  disposed at an adequate interval in width direction B. 
     The discharge roller  43  includes the discharge driving roller  44  that is constituted by a plurality of short rubber rollers disposed at an adequate interval in width direction B on roller driving shaft  44   a,  and the discharge driven roller  45  that is constituted by disk-shape tooth rollers placed in a pair with the discharge driving roller  44 . A driven pulley  82  is mounted at one end of the roller driving shaft  44   a,  and rotation of the transport driving roller  35  using a driving motor (only a pinion  8  is shown) as a power source is transmitted to the discharge driving roller  44  through a timing belt  83  wound between the driving pulley  80  and the driven pulley  82  to interlock with each other. 
     The release mechanism  6  is designed to switch the discharge driven roller  45  between a nip position, at which the discharge driven roller  45  is brought into contact with the discharge driving roller  44  when the soft recording medium P is transported, and a release position, at which the discharge driven roller  45  is spaced from the discharge driving roller  44  when the holding tray  55  is transported. Specifically, the release mechanism  6  includes a support frame  84  that supports the discharge driven roller  45  in a freely rotatable state, a support rod  85  that supports the support frame  84 , and a position switch mechanism  86  using a cam mechanism and a slide guide mechanism that moves the support rod  85  together with the discharge driven roller  45  between the nip position and the release position described below in a state where the posture of the support frame  84  is maintained horizontally. 
     The controller  81  controls the discharge driving roller  45  to be rotated a predetermined amount in a discharge direction before the discharge driven roller  45  is moved from the release position to the nip position. Therefore, when a hard recording medium Q remains on a transport path  56  in a state of being deviated from the set recess  71  of the holding tray  55 , the controller  81  allows the hard recording medium Q remaining on the transport path  56  to be discharged outside the printer main body  2  by releasing the power transmission to the holding tray  55  through the clutch mechanism  7  and then by rotating the transport driving roller  35  and the discharge driving roller  44  in the transport direction A, i.e., in the discharge direction. 
     Specifically, the hard recording medium Q is discharged outside the printer main body  2  by rotating the transport driving roller  35  in the transport direction A while rotating the discharge driving roller  44  in the discharge direction via the timing belt  83 , and by a discharge force caused by friction force between the discharge driving roller  44  and the lower side of the hard recording medium Q contacting the discharge driving roller  44 . 
     Further, as shown in  FIG. 7 , when a portion of the hard recording medium Q is pinched by the transport roller  34  in a state of being deviated from the set recess  71  of the holding tray  55 , the hard recording medium Q may be extruded and discharged outside the printer main body  2  by rotating the transport roller  34  in the transport direction A. In addition, after the hard recording medium Q is moved to the position unaffected by the transport force of the transport roller  34 , the hard recording medium Q is subjected to the discharge force of the discharge driving roller  44  to be securely discharged outside the printer main body  2 . 
     Next, the operation of the recording apparatus of the embodiment constituted as the above will be described. 
     The operation of the recording apparatus of the embodiment will be described with three processes, i.e., (1) a process for receiving the holding tray, (2) a process for discharging the recording medium, and (3) a process for moving the discharge driven roller. The process for discharging the recording medium is performed after the process for receiving the holding tray and before the process for moving the discharge driven roller. 
     (1) A Process for Receiving the Holding Tray (See  FIGS. 4 ,  5 ,  6  and  7 ) 
     The process for receiving the holding tray is performed to move the holding tray  55  located at the set position to the received position. For example, as shown in  FIG. 4 , when the hard recording medium Q is located on the holding tray  55  immediately before beginning to move toward the received position in a state of being deviated from the set recess  71  in the width direction B due to the user&#39;s inappropriate handling, the process is as below. 
     As shown in  FIG. 4 , the holding tray  55  begins to move toward the received position by being pulled toward the depth portion by the guide arms  74 L,  74 R that are pinched by the transport roller  34 . When the holding tray  55  moves, as shown in  FIG. 5 , the transport roller  34  continues to move toward the received position by directly pinching the holding tray  55 . However, the hard recording medium Q remains on the transport path  56  as shown. 
     Even in a state where the holding tray  55  reaches the received position as shown in  FIGS. 6 and 7 , the hard recording medium Q remains on the transport path  56  and stops on the discharge driving roller  44  as shown in  FIG. 6 . Otherwise, the holding tray  55  is pulled further toward the depth portion, and a portion of the hard recording medium Q is stopped in a state of being pinched by the transport roller  34  as shown  FIG. 7 . 
     (2) A Process for Discharging the Recording Medium (See  FIG. 8 ) 
     The process for discharging the recording medium is performed to rotate the discharge driving roller  44  a predetermined amount in the discharge direction before the discharge driven roller  45  is moved from the release position to the nip position. Specifically, this process rotates the transport driving roller  35  in the transport direction A, i.e., the discharge direction by changing the rotation direction of the driving motor. The rotation of the transport driving roller  35  is transmitted to the roller driving shaft  44   a  via the timing belt  83  to rotate the discharge driving roller  44  in the discharge direction. Here, rotation of the roller driving shaft  44   a  is not transmitted to a transmission gear  87  and the discharge driven roller  45  waits at the release position (see  FIG. 2 ). 
     The hard recording medium Q remaining on the transport path  56  is discharged outside the printer main body  2  as shown by the discharge force caused by the friction force of the discharge driving roller  44 . In a state of  FIG. 7 , the hard recording medium Q remaining on the transport path  56  also subjected to extrusion by the transport roller  34  is discharged outside the printer main body  2 . 
     In the embodiment, when the transport driving roller  35  is rotated in the discharge direction, the power transmission to the pinion  69  is released by the clutch mechanism  7 , so that the holding tray  55  is prevented from being moved in a transport direction which has no relation with the operation to discharge the hard recording medium Q remaining on the transport path  56  outside the apparatus main body. Therefore, it is possible to suppress abrasion of the respective constituent members such as the holding tray  55  or the guide arm  74  connected to the holding tray  55 , and the like. 
     (3) A Process for Moving the Discharge Driven Roller (See FIGS.  1  to  3 ) 
     The process for moving the discharge driven roller is performed to move the discharge driven roller  45  located at the release position (see  FIG. 2 ) to the nip position (see  FIGS. 1 and 3 ) after the holding tray  55  is moved to the received position. Namely, this process transmits the rotation of the discharge driving roller  44  to the position switch mechanism  86  via the transmission gear  87  by operating the release mechanism  6 . As a result, the support rod  85  and the discharge driven roller  45  located at the release position together with the support frame  84  are moved in a downwardly inclined direction and toward the depth portion, and then to the nip position at which the discharge driven roller  45  is brought into contact with the outer circumference surface of the discharge driving roller  44 . 
     According to the embodiment, the operation to rotate the discharge driving roller  44  a predetermined amount in the discharge direction is performed before the discharge driven roller  45  is moved to the nip position, so that, if the hard recording medium Q remains on the transport path  56  due to the user&#39;s mistaken handling, the remaining hard recording medium is subjected to the discharge force from the discharge driving roller to be discharged outside the apparatus main body. Therefore, it is possible to smoothly discharge the hard recording medium such as a CD-R, or the like outside the apparatus main body without carelessly damaging the hard recording medium. 
     The operations of the processes (1) to (3) are performed even in the event that there is no inappropriate handling by the user and the hard recording medium is not located on the holding tray  55 . 
     Other Embodiments 
     The recording apparatus  1  according to the invention basically has the afore-mentioned structure, but it is possible to modify or omit a portion of the structure without departing from the scope of the invention. 
     For example, the invention is not limited to the case that the hard recording medium Q is deviated in the width direction B, thus it is possible to obtain the same effect as the above and to discharge the hard recording medium Q outside the main body  2  even in the event that there is a deviation in the transport direction A. 
     In the above embodiment, the recording apparatus having the release mechanism is described, but a recording apparatus not having the release mechanism may obtain useful effects by being constituted as the below. Namely, in this embodiment, the controller  81  reverses the transport roller  34  to move the holding tray  55  to the received position, and then rotates the discharge roller  43  a predetermined amount in the discharge direction. By this, even in the event that the hard recording medium Q remains on the transport path, the remaining hard recording medium Q is subjected to the discharge force from the discharge roller  43  to be smoothly discharged outside the apparatus main body before beginning the transport operation to record onto the first soft recording medium P, such as paper, and the like. Therefore, the occurrence of the problem that the first soft recording medium P such as paper, and the like is carelessly deformed, may be reduced. 
     Also, it is possible to omit the clutch mechanism  7  provided in the embodiment. Namely, when the hard recording medium Q is located on the transport path  56 , the controller  81  allows the hard recording medium Q to be extruded by the holding tray  55  by operating the transport roller  34  and the supplementary transport mechanism  67  in a predetermined direction to move the holding tray  55  to the received position, followed by operating the transport roller  34  and the supplementary transport mechanism  67  in a reverse direction to the predetermined direction. 
     According to the embodiment, even in the event that the hard recording medium Q remains on the transport path  56 , it is possible to use not only the friction force of the discharge driving roller  44  but the extrusion force of the holding tray  55  as the discharge force to discharge the remaining hard recording medium Q, so that the hard recording medium Q is reliably discharged outside the apparatus main body before the discharge driven roller  45  is moved from the release position to the nip position. 
     In addition, it is possible to configure the discharge driving roller  44  to be detached from the transport driving roller  35  and to be independently rotatable. In this case, even if the clutch mechanism  7  provided in the embodiment is omitted, movement of the holding tray  55  is prevented during the discharging of the hard recording medium Q.