JP5970693B2 - Recording device - Google Patents

Description

  The present invention relates to a recording apparatus.

2. Description of the Related Art A recording apparatus is known that performs double-sided printing by printing on one side of a sheet, conveying the curved path, inverting the sheet, and printing on the other side of the sheet (for example, Patent Document 1). FIG. 5 is a diagram schematically showing a conveyance path in such a recording apparatus. The recording apparatus shown in FIG. 5A includes conveyance paths K2 and K3, a conveyance path K1 that obliquely intersects the conveyance paths K2 and K3, and a curved path K4 that connects the conveyance path K3 and the conveyance path K1. It has been.
As indicated by the arrows, the paper P5 is transported in the direction D5 along the transport path K1 and the transport path K2, and after recording on one surface of the paper P5 in the recording unit 80, the direction of the transport path K2 and the transport path K3 in this order. The paper P5 is conveyed in the direction opposite to D5. Then, the paper P5 is transported along the curved path K4, and the paper P5 is transported again in the direction D5 along the transport paths K1 and K2, so that the other side of the paper P5 in the recording unit 80 with the paper P5 reversed. Record on the side.
Such a recording apparatus performs recording by conveying various types of recording media, such as a difference in rigidity due to different thicknesses and materials, and the presence or absence of a coating layer formed for photographic printing, to the recording unit 80. .

JP 2010-76200 A

Therefore, when the angle Q1 at which the transport path K1 and the transport paths K2 and K3 intersect is large, the portion of the sheet P5 having high rigidity where the transport path K1 and the transport path K2 intersect from the transport path K1 side toward the transport path K2. When passing through J, the paper P5 is bent, so that there are problems that the conveyance of the paper P5 stops and the coating layer on the surface of the paper P5 is broken.
Therefore, the angle at which the conveyance path K1 and the conveyance paths K2 and K3 intersect is determined from the angle Q1 in FIG. 5A so that the highly rigid sheet P5 does not stop and the coating layer on the surface of the sheet P5 does not break. A small angle Q2 in FIG. 5B must be provided.
However, if the angle at which the transport path K1 and the transport paths K2 and K3 intersect is small, the length L3 of the transport path K3 in FIG. 5B is longer than the length L1 of the transport path K3 in FIG. turn into.
As described above, in the recording apparatus having the curved path K4 for inverting the recording medium, when the sheet passes through the portion J where the conveying path intersects, the highly rigid sheet P5 stops or the coating layer on the surface of the sheet P5. In order to suppress cracking, the length of the transport path K3 must be long. Therefore, there is a problem that the recording apparatus is increased in size.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 Recording on a first storage unit that stores a first recording medium, a second storage unit that stores a second recording medium, the first recording medium, and the second recording medium A recording unit that performs communication, a first conveyance path that communicates the recording unit and the first storage unit, a second conveyance path that communicates the recording unit and the second storage unit, and the first When transporting one recording medium to the first transport path, the recording medium rotates in the first rotation direction, and when transporting the second recording medium to the second transport path, the first rotation is performed. And a conveyance roller that rotates in a second rotation direction opposite to the direction.

  According to this application example, the first storage unit that stores the first recording medium and the second storage unit that stores the second recording medium are provided, and the first recording medium passes through the first transport path. When transporting to the second transport path, the transport roller rotates in the first rotation direction, and when transporting the second recording medium to the second transport path, the transport roller rotates in the second rotation direction opposite to the first rotation direction. Is provided. Thereby, a 1st conveyance path | route or a 2nd conveyance path | route can be selected by changing the rotation direction of a conveyance roller by a 1st accommodating part or a 2nd accommodating part. That is, the first transport path or the second transport path can be selected depending on the difference in rigidity between the first recording medium and the second recording medium and the presence or absence of a layer formed on the surface. Therefore, it is possible to suppress bending of the recording medium having a high rigidity among the first recording medium and the second recording medium or the recording medium having a layer on the surface by the conveyance path. Therefore, it is possible to suppress a recording medium having high rigidity or a recording medium having a layer on the surface from stopping in the transport path or from cracking the layer formed on the surface.

  Application Example 2 In the transport direction of the first recording medium and the second recording medium, the first transport path intersects the second transport path on the downstream side of the transport roller. The recording apparatus comprising a unit.

  According to this application example, the one of the first recording medium and the second recording medium having the low rigidity and the recording medium on which the layer is not formed is transported in the direction bent when passing through the intersection. Through the path, the one of the first recording medium and the second recording medium having a higher rigidity and having a layer formed on the surface is transported in the direction that is not bent when passing through the intersection. You can pass the route. As a result, the angle of the intersection is determined based on the recording medium with low rigidity and no layer formed on the surface without considering the recording medium with high rigidity and the layer formed on the surface. Can be provided. Therefore, the angle can be larger than the angle of the intersection provided on the basis of the recording medium having high rigidity and having a layer formed on the surface. Therefore, since the length of the 1st conveyance path | route and the 2nd conveyance path | route in a conveyance direction can be shortened, it can suppress that a recording apparatus enlarges.

  Application Example 3 The recording apparatus, wherein a medium guide surface that forms the first transport path and the second transport path is an outer peripheral surface of the transport roller.

  According to this application example, since it is not necessary to provide a guide surface of the recording medium, the manufacturing cost of the recording apparatus can be suppressed.

FIG. 3 is a diagram for explaining a schematic configuration of a recording apparatus. The figure which expanded the part of the conveyance part. The figure which expanded the part of the conveyance part. The figure which shows the recording apparatus of the part provided with the conveyance part and the hopper which mounts a paper horizontally. The figure for demonstrating the conventional recording device.

(Embodiment 1)
A schematic configuration of an inkjet printer (hereinafter referred to as “printer”) 1 as a recording apparatus according to the first embodiment will be described. FIG. 1 is a diagram for explaining a schematic configuration of the printer 1.

  The printer 1 includes a front feeding unit 2 at the bottom of the apparatus (lower side of the drawing) and a rear feeding unit 3 at the rear of the apparatus (right side of the drawing). A paper P1 as a first recording medium is placed in a paper feed cassette 25 as a first storage unit in the front feeding unit 2. A sheet P2 as a second recording medium is placed on the hopper 6 as the second storage unit in the rear feeding unit 3.

  The paper P1 is a so-called plain paper, and the paper P2 is a printing paper in which a coating layer is applied for photographic printing on a base such as photographic paper. The paper P2 is thicker than the paper P1 and is more rigid than the paper P1.

  A transport unit 30 that transports the sheets P1 and P2 from the front feeding unit 2 and the rear feeding unit 3 to the transport roller pair 12 is provided. The sheets P1 and P2 are transported to the recording unit 14 by the transport roller pair 12, and after recording is performed in the recording unit 14, the paper is discharged to the stacker 22 by the discharge roller pair 13.

  The recording unit 14 includes a recording head 15 as recording means for ejecting ink as liquid. A support portion 21 as a support base is disposed below the recording head 15. Then, recording is performed by ejecting ink from the recording head 15 onto the sheets P1 and P2 conveyed on the support portion 21.

  The transport unit 30 includes transport rollers 9, 10, and 18 that transport the paper P <b> 1 and P <b> 2 in pairs with the intermediate transport roller 8 as a transport roller that can rotate in both forward and reverse directions. Prepare. On the outer peripheral side of the intermediate conveyance roller 8, an intermediate conveyance roller back surface path 19, an intermediate conveyance roller upper path 11, and an intermediate conveyance roller lower path 17 are provided.

  The intermediate transport roller upper path 11 is provided at an angle R with respect to the intermediate transport roller lower path 17, and the intermediate transport roller upper path 11 and the intermediate transport roller lower path 17 are connected at the intersection G. The The intermediate conveyance roller rear surface side path 19 is a path from the nip point between the intermediate conveyance roller 8 and the conveyance driven roller 9 to the nip point between the intermediate conveyance roller 8 and the conveyance driven roller 10, and is connected to the intermediate conveyance roller upper path 11. Is done.

  The intermediate transport roller upper path 11 is a path from the nip point between the intermediate transport roller 8 and the transport driven roller 10 to the intersection G, and is connected to the intermediate transport roller lower path 17. The intermediate conveyance roller lower path 17 is a path from the nip point between the intermediate conveyance roller 8 and the conveyance driven roller 18 to the intersection G. The conveyance roller pair upstream path 24 is a path from the intersection G to the nip point of the conveyance roller pair 12.

  The transport roller pair 12 includes a transport drive roller 12b that is rotationally driven by a motor (not shown), and a transport driven roller 12a that is driven to rotate by elastic contact with the transport drive roller 12b from above. The transport driving roller 12b is provided with an adhesion layer in which wear-resistant particles are substantially uniformly dispersed on the outer peripheral surface of a metal shaft extending in the paper width direction. The transport driven roller 12a has a low friction such as a polyacetal resin on the outer peripheral surface. It is made of a material, and a plurality of the drive driving rollers 12b are arranged in the axial direction.

  On the downstream side of the transport roller pair 12, a discharge roller pair 13 that discharges the recorded sheets P1 and P2 is provided. The discharge roller pair 13 includes a discharge drive roller 13b that is rotationally driven by a motor (not shown), and a discharge driven roller 13a that is driven to rotate in contact with the discharge drive roller 13b.

  The transport driving roller 12b and the discharge driving roller 13b are rotated in the forward direction (counterclockwise direction in FIG. 1) to feed the papers P1 and P2 in the transport direction D3 (left direction in FIG. 1). It has become.

  Further, the conveyance driving roller 12b and the discharge driving roller 13b rotate in the reverse direction (clockwise direction in FIG. 1), thereby returning the paper P1 in the direction opposite to the conveyance direction D3 through the conveyance roller pair upstream path 24. It is conveyed (returned) in the direction (right direction in FIG. 1) and conveyed toward the intersection G.

  As a result, the recorded paper P1 is not discharged to the stacker 22, but is fed in the reverse direction toward the upstream side (the right side in FIG. 1), so that the paper P1 is in the intermediate transport roller lower path 17 and the back of the intermediate transport roller. By passing the side path 19 and the intermediate transport roller upper path 11, the recording surface (front surface) can be faced down and the sheet can be fed again to the transport roller pair 12.

  As described above, the printer 1 includes a sheet reversing device including the conveyance roller pair 12, the discharge roller pair 13, and the conveyance unit 30, and has a double-sided recording function for performing recording on both sides of the paper P1.

  Hereinafter, the components of the transport path will be described in more detail. The rear feeding unit 3 includes a hopper 6, a rear feeding roller 7, an intermediate conveyance roller 8, and other components not shown. The hopper 6 is formed of a plate-like body, and is provided so as to be swingable around the upper swing fulcrum 31. By swinging, the sheet P2 supported in an inclined posture on the hopper 6 is transferred to the rear feeding roller 7. The pressure contact posture for pressure contact and the separation posture for separating from the rear feeding roller 7 are switched.

  The rear feeding roller 7 has a circular shape and rotates to feed the uppermost sheet P2 in pressure contact to the downstream side. By other components (not shown) (retard roller, paper return lever, etc.), only the uppermost sheet P2 is fed, and the next and subsequent sheets P2 to be double fed are returned onto the hopper 6.

  On the other hand, the front feeding unit 2 provided at the bottom of the printer 1 and configured to set the paper P1 from the front of the apparatus (left side of the drawing) includes a paper feeding cassette 25, a front feeding roller 20, an arm 23, and the like. The high friction member 4 is provided.

  The front feeding roller 20 that is rotationally driven by a motor (not shown) rotates in contact with the uppermost one of the paper P1 set in the paper feeding cassette 25 that can be mounted and removed from the front side of the apparatus, thereby The paper P1 is fed out from the paper feed cassette 25.

  A high friction member 4 is provided in the traveling direction of the uppermost sheet P1 fed by the front feeding roller 20. When the uppermost sheet P1 comes into contact with the high friction member 4, the leading edge of the next or subsequent sheet P1 fed from the sheet feeding cassette 25 along with the uppermost sheet P1 to be fed is placed on the high friction member 4. Stay in contact with the.

  The front feeding roller 20 is rotatably supported by an arm 23 that can rotate around a rotation shaft 26. Further, the arm 23 is urged in a direction (a clockwise direction in FIG. 1) in which the front feeding roller 20 presses the stacked sheets P1 downward by an urging member (not shown).

  FIG. 2 is an enlarged view of a portion of the conveyance unit 30 in FIG. The path switching member 5 is provided so as to be rotatable about a rotation shaft 27. The path switching member 5 is normally located at a position indicated by a solid line in FIGS. 1 and 2 due to its own weight. Therefore, since the space between the path switching member 5 and the wall portion 28 is in an open state, when the paper P1 placed on the paper feed cassette 25 is fed by the front feeding roller 20, the paper P1 is It is conveyed toward the nip point between the intermediate conveyance roller 8 and the conveyance driven roller 9.

  When the paper P2 placed on the hopper 6 is fed by the rear feeding roller 7, the path switching member 5 is pushed up by the paper P2 and rotates around the rotation shaft 27, and the position shown by the broken line Rotate until. Therefore, since the space between the path switching member 5 and the wall portion 29 is open, the sheet P2 is transported toward the nip point between the intermediate transport roller 8 and the transport driven roller 18.

  In this way, the path switching member 5 is provided so as to be rotatable about the rotation shaft 27, and rotates to feed the paper P <b> 1 fed from the front feeding unit 2 to the intermediate transport roller rear side path 19. And a path for feeding the paper P2 fed from the rear feeding unit 3 to the intermediate conveyance roller lower path 17 are switched.

  The sheet P1 fed from the front feeding unit 2 in FIG. 1 is separated into only the uppermost sheet by the high friction member 4, passes through the outside of the path switching member 5 (the outside centered on the intermediate transport roller 8), The conveyance roller via the nip point between the intermediate conveyance roller 8 and the conveyance driven roller 9, the intermediate conveyance roller back side path 19, the nip point between the intermediate conveyance roller 8 and the conveyance driven roller 10, the intermediate conveyance roller upper path 11, and the intersection G. It reaches pair 12.

  When the sheet P1 fed from the sheet feeding cassette 25 by the front feeding roller 20 is transported along the intermediate transport roller rear side path 19 and the intermediate transport roller upper path 11, the intermediate transport roller 8 is corrected by a motor (not shown). It rotates in the first rotation direction D1, which is the rotation direction.

  The conveyance driven roller 9 and the conveyance driven roller 10 are provided so as to be in contact with the outer peripheral surface 8a of the intermediate conveyance roller 8, and the paper P1 is placed between the intermediate conveyance roller 8 and the conveyance driven roller 9 and the intermediate conveyance roller. The sheet P1 is conveyed along with the rotation of the intermediate conveyance roller 8 by niping between the intermediate conveyance roller 8 and the conveyance driven roller 10.

  On the other hand, the sheet P2 fed from the hopper 6 by the rear feeding roller 7 rotates the path switching member 5 as described above, passes through the nip point between the intermediate transport roller 8 and the transport driven roller 18, and passes through the intermediate transport roller. It reaches the conveyance roller pair 12 via the lower path 17 and the intersection G.

  When the paper P2 fed from the hopper 6 by the rear feeding roller 7 is transported toward the intermediate transport roller lower path 17 and the intersection G, the intermediate transport roller 8 is driven in the first rotational direction by a motor (not shown). It rotates in the second rotation direction D2 opposite to D1.

  The conveyance driven roller 18 is provided so as to contact the outer peripheral surface 8 a of the intermediate conveyance roller 8, and the rotation of the intermediate conveyance roller 8 is performed by nipping the paper P <b> 2 between the intermediate conveyance roller 8 and the conveyance driven roller 18. The paper P2 accompanying the above is conveyed.

  The sheets P1 and P2 that have reached the pair of transport rollers 12 are transported to the downstream recording unit 14 side by rotating the transport drive roller 12b while being nipped by the transport drive roller 12b and the transport driven roller 12a. . In the present embodiment, the direction in which the paper P1, P2 is transported by the transport driving roller 12b and the transport driven roller 12a (the left direction in FIG. 1) when recording on the paper P1, P2 is “downstream”. The opposite direction (right direction in FIG. 1) is defined as “upstream side”.

  The recording head 15 is provided at the bottom of the carriage 16, and the carriage 16 is driven to reciprocate in the main scanning direction by a drive motor (not shown). The carriage 16 is equipped with independent ink cartridges (not shown) for a plurality of colors, and ink is supplied from the ink cartridges to the recording head 15.

  At a position facing the recording head 15, there is provided a support portion 21 that has a shape extending in the paper width direction and supports the paper from below and guides it to the downstream side. An interval between the head 15 is defined.

  The paper P1, P2 on which recording is performed by the recording unit 14 is rotated by the discharge drive roller 13b while being nipped by the discharge drive roller 13b and the discharge driven roller 13a. The paper is discharged to the paper tray 22.

  The sheets P1 and P2 are formed with a curved posture that protrudes downward between the transport roller pair 12 and the discharge roller pair 13, thereby preventing the sheets P1 and P2 from floating from the support portion 21. Thus, the distance between the recording surfaces of the sheets P1 and P2 and the recording head 15 is kept constant. Therefore, the axis position of the conveyance driven roller 12a is set slightly downstream so that the straight line passing through the axis of both the conveyance driving roller 12b and the conveyance driven roller 12a has an inclination angle with respect to the conveyance direction D3. Has been.

  Next, double-sided printing in the printer 1 will be described. The sheet P1 fed from the front feeding unit 2 and reaching the recording unit 14 is rotated on the front side (upper surface) by the recording head 15 while the conveyance roller pair 12 and the discharge roller pair 13 rotate in the forward direction. As a result, the rear end is transported to a position that passes the detection position indicated by arrow A. At this stage, the feeding process of the paper P1 ends, and then the paper P1 shifts to the reversing process as the transport roller pair 12 and the discharge roller pair 13 rotate in the reverse direction.

  FIG. 3 is an enlarged view of a portion of the conveyance unit 30 when the paper P1 is in the reversing process. When the intermediate transport roller 8 rotates in the rotation direction D1, the leading edge of the sheet P1 moves from the nip point between the intermediate transport roller 8 and the transport driven roller 18 to the nip point between the intermediate transport roller 8 and the transport driven roller 9. . At this time, when the leading edge of the paper P1 pushes the path switching member 5, the path switching member 5 rotates clockwise as indicated by a broken line in FIG. 3, and the paper P1 is moved between the intermediate transport roller 8 and the path switching member. You can pass between 5.

  In the reversal process, the paper P1 is conveyed to the upstream path 24, the intersection G, the intermediate transport roller lower path 17, the nip point between the intermediate transport roller 8 and the transport driven roller 18, the intermediate transport roller 8 and the transport driven roller 9. While passing through the nip point between the intermediate conveyance roller, the back side path 19 of the intermediate conveyance roller, the nip point between the intermediate conveyance roller 8 and the conveyance driven roller 10, the intermediate conveyance roller upper path 11, the intersection G, and the conveyance roller pair upstream path 24, Invert.

  That is, a part of the conveyance path from the front feeding unit 2 (the nip point between the intermediate conveyance roller 8 and the conveyance driven roller 9, the nip point between the intermediate conveyance roller back side path 19, the intermediate conveyance roller 8 and the conveyance driven roller 10). The reversing path for reversing the sheet P1 is configured by the intermediate transport roller upper path 11, the intersection G). The transport unit 30 functions as a reversing unit.

  After the trailing edge of the sheet P1 in the reversing process is separated from the transport roller pair 12, the transport drive roller 12b is driven in the reverse direction and the forward drive is resumed.

  When driving in the forward direction of the transport driving roller 12b is resumed, the reversed paper P1 passes through the intersection G and is transported to the position of the recording unit 14 again. Then, recording is performed on the back side by the recording head 15, whereby double-sided printing is performed on the paper P1.

  The first transport path in the present embodiment is a transport path from the nip point between the intermediate transport roller 8 and the transport driven roller 9 to the intersection G, that is, the intermediate transport roller back side path 19, the intermediate transport roller 8, and the like. This is a transport path constituted by a nip point with the transport driven roller 10 and an intermediate transport roller upper path 11.

  Further, the second transport path in the present embodiment is a transport path from the nip point between the intermediate transport roller 8 and the transport driven roller 18 to the intersection G, that is, constituted by the intermediate transport roller lower path 17. It is a transport route.

  The printer 1 of the present embodiment described above has the paper feed cassette 25 as the first storage unit that stores the paper P1 as the first recording medium, and the second paper that stores the paper P2 as the second recording medium. The hopper 6 serving as a storage unit for the recording medium, the recording unit 14 for recording on the sheets P1 and P2, the first conveyance path for communicating the recording unit 14 and the paper feed cassette 25, and the recording unit 14 and the hopper 6 are communicated. The second rotation path to be rotated and the sheet P1 are rotated in the first rotation direction D1 when the sheet P1 is conveyed to the first conveyance path, and the first rotation is performed when the sheet P2 is conveyed to the second conveyance path. An intermediate conveyance roller 8 as a conveyance roller that rotates in a second rotation direction D2 opposite to the direction D1.

  With this configuration, the first transport path or the second transport path can be selected by changing the rotation direction of the intermediate transport roller 8 by the paper feed cassette 25 or the hopper 6. That is, the first transport path or the second transport path can be selected depending on the difference in rigidity between the paper P1 and the paper P2 and the presence or absence of a layer such as a coating layer formed on the surface. In the present embodiment, the sheet P1 having low rigidity and having no layer formed on the surface is placed on the sheet feeding cassette 25, the intermediate transport roller 8 is rotated in the first rotation direction D1, and the first transport path is used. A certain intermediate conveyance roller rear side path 19 and intermediate conveyance roller upper side path 11 are selected. Further, the sheet P2 having high rigidity and having a coating layer formed on the surface is placed on the hopper 6, the intermediate transport roller 8 is rotated in the second rotation direction D2 opposite to the first rotation direction D1, The intermediate conveyance roller lower path 17 as the second conveyance path is selected.

  As a result, the sheet P2 does not pass through the curved portion of the intermediate conveyance roller back surface side path 19 or enter the intersection G from the intermediate conveyance roller upper path 11. Accordingly, the sheet P2 having high rigidity and having the coating layer formed on the surface stops at the intermediate conveyance roller back side path 19 and the intermediate conveyance roller upper path 11 or the coating layer formed on the surface is cracked. Can be suppressed.

  Further, in the transport direction D3 of the paper P1 and the paper P2, an intersection G where the intermediate transport roller lower path 17 and the intermediate transport roller upper path 11 intersect on the downstream side of the intermediate transport roller 8 is provided.

  The sheet P1, which has a lower rigidity than the sheet P2 and does not have a layer on the surface, is bent from the intermediate conveyance roller upper path 11 to the intersection G by the intermediate conveyance roller 8 rotating in the first rotation direction D1. The ink enters and passes through the conveyance roller pair upstream path 24 and is conveyed to the recording unit 14.

  On the other hand, the sheet P2 having a higher rigidity than the sheet P1 and having a coating layer on the surface thereof, the intermediate transport roller 8 rotates in the second rotation direction D2 opposite to the first rotation direction D1, so that the sheet P2 is The sheet is conveyed to the recording unit 14 through the intermediate conveyance roller lower path 17, the intersection G, and the conveyance roller pair upstream path 24 without being bent.

  Therefore, the angle R at which the intermediate conveyance roller lower path 17 and the intermediate conveyance roller upper path 11 intersect at the intersection G is provided without considering the rigidity of both the paper P1 and the paper P2 and the surface coating layer. Can do. That is, the angle R at the intersection G can be provided based on the rigidity of the paper P1 having a lower rigidity than the paper P2 without considering the rigidity of the paper P2 having a higher rigidity than the paper P1 and the coating layer on the surface. Therefore, it becomes possible to make it larger than the angle at the intersection G provided based on the rigidity of the paper P2 and the coating layer on the surface. Thereby, since the length M2 of the intermediate conveyance roller lower path 17 and the length M1 of the intermediate conveyance roller upper path 11 in the conveyance direction D3 of FIG. 2 can be shortened, the printer 1 can be prevented from being enlarged. .

  Further, the curvature of the curved portion of the intermediate transport roller back side path 19 may be set based on the rigidity of the paper P1 without considering the rigidity of the paper P2 and the coating layer on the surface. Accordingly, the intermediate transport roller rear side path is more than when the curvature of the curved portion of the intermediate transport roller rear side path 19 is set on the basis of the rigidity of the paper P2 having higher rigidity than the paper P1 and the coating layer on the surface of the paper P2. The curvature of 19 curved portions can be increased.

  Therefore, by increasing the curvature of the curved portion of the intermediate conveyance roller back side path 19, the height M3 of the intermediate conveyance roller back side path 19 of FIG. 2 is reduced, so that the printer 1 can be prevented from being enlarged.

  Further, the intermediate conveyance roller back surface side path 19 as the medium guide surface is composed of the outer peripheral surface 8 a of the intermediate conveyance roller 8. According to this configuration, it is not necessary to provide the guide surfaces of the sheets P1 and P2 by the wall portion, so that the manufacturing cost of the printer 1 can be suppressed.

  In the first embodiment, the double-sided printing of the paper P1 placed on the paper feed cassette 25 is performed and the double-sided printing of the paper P2 placed on the hopper 6 is not performed. The paper P2 that does not stop in the transport path even if it enters the intersection G from the intermediate transport roller upper path 11 may be placed on the hopper 6 and double-sided printing may be performed using the transport unit 30.

(Embodiment 2)
FIG. 4 is a diagram illustrating a part of the printer 1a including the transport unit 30 and a hopper 6a for placing the paper P2 in a horizontal state. The rear feeding unit 3a in the present embodiment is provided with a hopper 6a on which the paper P2 is placed in a horizontal or nearly horizontal state and can swing around a swinging fulcrum 31a.

  By placing the paper P2 in a horizontal state by the hopper 6a, when the paper P2 is fed by the rear feeding roller 7a, the angle at which the paper P2 is bent can be reduced. Thereby, when the thick and highly rigid paper P2 is fed by the rear feed roller 7a, the paper P2 can be prevented from coming into contact with the opening 32 and stopping. Moreover, it can suppress that the coating layer formed in the surface side of the paper P2 cracks.

  Other configurations of the printer 1a are the same as those of the printer 1 described in the first embodiment.

  In the first and second embodiments, the ink jet printer 1 including the recording head 15 has been described. However, the present invention is also applicable to an electrophotographic printer including a photoconductor.

  DESCRIPTION OF SYMBOLS 1, 1a ... Inkjet printer, 6, 6a ... Hopper, 8 ... Intermediate conveyance roller, 8a ... Outer peripheral surface, 9, 10, 18 ... Feed driven roller, 11 ... Intermediate conveyance roller upper path, 14 ... Recording part, 17 ... Intermediate conveyance roller lower path, 19... Intermediate conveyance roller rear side path, 25... Paper feed cassette, D1... First rotation direction, D2.

Claims (3)

A first placement section for placing a first recording medium;
A second placement section for placing a second recording medium;
A recording unit for recording on the first recording medium and the second recording medium;
A first path including an inversion path for inverting the first recording medium fed from the first placement section toward the recording section;
The second recording medium fed from the second placement unit is transported, and the second recording medium crosses the first path upstream of the reversing path in the transport direction of the first recording medium. Route,
An outer peripheral surface is a roller facing the reversing path and the second path, and the first recording medium is reversed by the reversing path by rotating in the first direction, and recording is performed by the recording unit. The first recording medium on which the recording has been performed is transported so as to be reversed by the roller on the second path, and rotated in a second direction opposite to the first direction. And a roller for transporting the recording medium on the second path from the second placement unit toward the recording unit. Arranged at the intersection of the first route and the second route,
The path switching member that regulates that the first recording medium fed from the first placement unit is transported toward the second path is provided. Recording device. The path switching member regulates that the first recording medium on which recording is performed by the recording unit is conveyed toward the second placement unit.
The recording apparatus according to claim 2 .

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