JP2014201369A - Sheet transport device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet transport device capable of transporting a sheet smoothly and achieving downsizing of the device.SOLUTION: A printer unit (sheet transport device) 100 comprises: transport roller pair 3 and 4 disposed so as to hold a sheet S and transporting the held sheet S in a predetermined transport direction; and guide members 8 and 9 disposed so as to separate from each other in the vicinity of the transport roller pair 3 and 4, and guiding the sheet S in the transport direction. The guide member 8 is disposed so as to traverse a tangent |1 of the transport roller pair 3, and the guide member 9 is disposed so as to traverse a tangent |2 of the transport roller pair 4.

Description

  The present invention relates to a sheet conveying apparatus, and more particularly to a sheet conveying apparatus provided with an upstream roller pair and a downstream roller pair for conveying a sheet.

  2. Description of the Related Art Conventionally, there has been known a sheet conveying apparatus including an upstream roller pair and a downstream roller pair for conveying a sheet (see, for example, Patent Document 1).

  Patent Document 1 discloses a sheet material conveying device (paper conveying device) provided with a sheet material conveying unit including a pair of rollers for nipping and conveying a sheet material (paper). In this sheet material conveying apparatus, one sheet material conveying unit is provided on each of the upstream side and the downstream side in the conveying direction of the sheet material. In these upstream and downstream sheet material conveying units, the tangents of the roller pairs constituting the upstream sheet material conveying unit and the tangents of the roller pairs constituting the downstream sheet material conveying unit intersect each other. Is arranged. Thus, the sheet material conveyance path is configured to bend between the upstream sheet material conveyance unit and the downstream sheet material conveyance unit. Here, an upper guide and a downstream guide unit for guiding the sheet material along the conveyance direction are provided between the upstream sheet material conveyance unit and the downstream sheet material conveyance unit. The upper guide and the downstream guide portion are formed so as to extend linearly in parallel to the tangent line of the roller pair constituting the upstream and downstream sheet material conveying portions, respectively. The vicinity of the end portion and the vicinity of the upstream end portion of the downstream guide portion are fixed in contact with each other.

Japanese Patent No. 3453508

  Here, in the conventional paper conveyance device as disclosed in the above-mentioned Patent Document 1, in order to reduce the size of the device by folding the paper conveyance path while smoothly conveying the paper along the curved surface, The conveyance path may be curved into a curved surface. However, in the configuration disclosed in Patent Document 1, the upper guide and the downstream guide portion are formed so as to extend linearly in parallel to the tangent lines of the upstream and downstream roller pairs, respectively, and are linear. Since the vicinity of the downstream end of the upper guide and the vicinity of the upstream end of the linear downstream guide are fixed in contact with each other, the sheet conveyance path is curved in a curved shape. As a result, it is considered that it is difficult to reduce the size of the apparatus while transporting the paper smoothly.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to provide a paper transport device that can reduce the size of the device while transporting paper smoothly. Is to provide.

  In order to achieve the above object, a paper transport device according to one aspect of the present invention is arranged to sandwich paper, and an upstream roller pair and a downstream roller for transporting the sandwiched paper in a predetermined transport direction A pair, and an upstream guide member and a downstream guide member that are disposed in the vicinity of the upstream roller pair and the downstream roller pair and are spaced apart from each other and guide the sheet along the transport direction. A structure in which the upstream guide member is disposed so as to cross the tangent line of the upstream roller pair extending along the line, and a structure in which the downstream guide member is disposed so as to cross the tangent line of the downstream roller pair extending along the conveyance direction. The arrangement positions of the upstream guide member and the downstream guide member with respect to the upstream roller pair and the downstream roller pair are set so as to include at least one of the above.

  In the paper conveying apparatus according to one aspect of the present invention, by configuring as described above, the upstream guide member disposed so as to cross the tangent line of the upstream roller pair and the tangent line of the downstream roller pair are crossed. By at least one of the downstream guide members arranged, the sheet conveyance path can be easily curved into a curved surface (curved shape). Thus, unlike the case where the paper transport path is configured by a plurality of linearly extending transport paths, the paper transport path is folded back while smoothly transporting the paper along the curved transport path. Miniaturization can be achieved. Further, by arranging the upstream guide member and the downstream guide member so as to be separated from each other, the vicinity of the downstream end of the upstream guide member and the vicinity of the upstream end of the downstream guide member are mutually connected. Unlike the case of contact, there is no need to extend the downstream end of the upstream guide member and the upstream end of the downstream guide member to a position where they come into contact with the downstream guide member and the upstream guide member, respectively. Therefore, the length of each of the upstream guide member and the downstream guide member can be shortened, and this can also reduce the size of the apparatus.

  In the sheet conveying apparatus according to the above aspect, preferably, the upstream guide member is arranged so as to cross at least the tangent of the upstream roller pair extending along the conveying direction, and at least the upstream guide member is the upstream side. It is arranged so as to extend in the direction intersecting the transport direction in the vicinity of the roller pair. According to this configuration, at least the upstream guide member is disposed so as to cross the tangent line of the upstream roller pair, and therefore, the upstream guide member easily and reliably curves the paper conveyance path into a curved surface. Can be made. This makes it possible to easily and reliably reduce the size of the apparatus while transporting the paper smoothly.

  In the paper conveying apparatus according to the above aspect, the upstream guide member is preferably disposed downstream of the upstream roller pair and outside of the conveying direction, and the downstream guide member is The upstream guide member is disposed on the upstream side with respect to the downstream roller pair and on the outer side with respect to the conveying direction, and the upstream end portion of the downstream guide member is adjacent to the downstream end portion of the upstream guide member. It is arrange | positioned outside with respect to the conveyance direction. According to this configuration, unlike the case where the upstream end portion vicinity of the downstream guide member is arranged on the inner side with respect to the transport direction than the downstream end portion vicinity of the upstream guide member, the upstream guide is different. Suppressing the paper from moving in the direction deviating from the original conveyance direction due to the leading edge of the paper conveyed downstream from the member coming into contact with the vicinity of the upstream edge of the downstream guide member. Can do. Accordingly, it is possible to suppress the occurrence of a paper jam even when the paper conveyance path is curved in a curved shape.

  In this case, preferably, the vicinity of the downstream end of the upstream guide member and the vicinity of the upstream end of the downstream guide member are spaced apart from each other so as not to overlap each other. According to this configuration, the vicinity of the upstream end portion of the downstream guide member can be surely arranged outside the vicinity of the downstream end portion of the upstream guide member in the transport direction. Even when the transport path is curved into a curved surface, a paper jam occurs because the leading edge of the paper transported downstream from the upstream guide member contacts the vicinity of the upstream edge of the downstream guide member. Can be reliably suppressed.

  In the sheet conveying apparatus in which the vicinity of the downstream end of the upstream guide member and the vicinity of the upstream end of the downstream guide member are arranged so as not to overlap each other, preferably, the downstream side of the upstream guide member The vicinity of the end and the vicinity of the upstream end of the downstream guide member are spaced apart from each other so as not to overlap each other. According to this configuration, unlike the case where the vicinity of the downstream end of the upstream guide member and the vicinity of the upstream end of the downstream guide member are arranged at a large distance, It is possible to suppress the formation of a large gap between the vicinity of the downstream end and the vicinity of the upstream end of the downstream guide member. As a result, the leading edge of the sheet conveyed downstream from the upstream guide member is located in the gap between the vicinity of the downstream end of the upstream guide member and the vicinity of the upstream end of the downstream guide member. It is possible to easily suppress the occurrence of a paper jam due to the intrusion.

  In the sheet conveying apparatus in which the vicinity of the upstream end portion of the downstream guide member is disposed outside the vicinity of the downstream end portion of the upstream guide member with respect to the conveying direction, it is preferable that the downstream guide member is downstream of the upstream guide member. A first inclined surface is formed on the surface on the downstream guide member side in the vicinity of the end portion on the side so as to be inclined away from the vicinity of the upstream end portion of the downstream guide member, and upstream of the downstream guide member. A second inclined surface is formed on the surface on the upstream guide member side in the vicinity of the end portion on the side so as to be inclined away from the vicinity of the downstream end portion of the upstream guide member. If comprised in this way, by forming a 1st inclined surface and a 2nd inclined surface in an upstream guide member and a downstream guide member, respectively, the upstream edge part vicinity of a downstream guide member is upstream more reliably. It can arrange | position outside with respect to the conveyance direction rather than the edge part vicinity of the downstream of a side guide member. As a result, even when the paper conveyance path is curved in a curved shape, the leading edge of the paper conveyed downstream from the upstream guide member contacts the vicinity of the upstream edge of the downstream guide member. Thus, it is possible to more reliably suppress the occurrence of a paper jam.

  In the paper conveyance device according to the above aspect, the paper conveyance device preferably further includes a printing unit for printing an image on the paper, and the downstream roller pair contacts a surface opposite to the side on which the image of the paper is printed. And a discharge roller that is rotatable in the direction of discharging the paper and a driven roller that is arranged to contact the surface on which the image of the paper is printed and rotates in accordance with the discharge roller. The roller is arranged so as to be orthogonal to the paper, and includes a thin disk member having an uneven outer peripheral portion. With this configuration, the contact area between the driven roller and the surface on which the image of the paper is printed is reduced, unlike the case where the driven roller is configured by a thick disk member having no irregularities on the outer peripheral portion. Therefore, it is possible to suppress degradation of the image quality due to the driven roller rubbing on the surface of the sheet on which the image is printed.

  According to the present invention, as described above, it is possible to reduce the size of the apparatus while transporting the paper smoothly.

1 is a block diagram illustrating a configuration of an inkjet multifunction peripheral including a printer unit and a scanner unit according to an embodiment of the present invention. It is the model which showed the internal structure of the printer part by one Embodiment of this invention. FIG. 3 is an enlarged perspective view illustrating a discharge roller pair of a printer unit according to an embodiment of the present invention. It is the schematic diagram which showed the internal structure of the scanner part by one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  With reference to FIGS. 1 to 4, a configuration of an inkjet multifunction peripheral 1000 including a printer unit 100 and a scanner unit 200 according to an embodiment of the present invention will be described. The printer unit 100 and the scanner unit 200 are both examples of the “paper transport device” in the present invention.

  As illustrated in FIG. 1, the inkjet multifunction peripheral 100 includes a printer unit 100 having an image reading function and a scanner unit 200 having an image printing function. Hereinafter, first, a specific internal configuration of the printer unit 100 according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 3.

  As shown in FIG. 2, the printer unit 100 includes an inkjet printing unit 1 for performing image printing processing on the paper S. The printer unit 100 is disposed in the vicinity of the paper feeding unit 151, and feeds the paper S 2 for feeding the paper S and the paper S fed by the paper feeding roller 2 to the printing unit 1 side. And a discharge roller pair 5 for discharging the paper S after printing, which is disposed in the vicinity of the discharge unit 152. Further, the printer unit 100 includes two auxiliary rollers 6 and 7 disposed before and after the printing unit 1 (between the printing unit 1 and the transport roller pair 4 and between the printing unit 1 and the discharge roller pair 5). Is provided. The sheet feeding roller 2, the conveying roller pair 3, 4, the discharge roller pair 5, and the auxiliary rollers 6 and 7 have a curved surface (curve) in which the conveying path of the sheet S is inside the printer unit 100 (the left portion in FIG. 2). Are arranged so as to be bent (see a one-dot chain line with an arrow in FIG. 2).

  The conveying roller pairs 3 and 4 and the discharge roller pair 5 are respectively driven by rotations of driving rollers 3a, 4a and 5a which are driven by a motor (not shown) as a power source, and driving rollers 3a, 4a and 5a. And rotating driven rollers 3b, 4b and 5b. The drive roller 5a is an example of the “discharge roller” in the present invention. The transport roller pair 3 is configured to sandwich the paper S transported from the upstream side (paper feed roller 2 side) and transport the paper S to the downstream side (transport roller pair 4 side). Further, the transport roller pair 4 is configured to sandwich the paper S transported from the upstream side (transport roller pair 3 side) and transport the paper S to the downstream side (discharge roller pair 5 side). The discharge roller pair 5 is configured to sandwich and discharge the sheet S conveyed from the upstream side (conveyance roller pair 4 side). That is, the conveyance roller pair 3 is an example of the “upstream roller pair” in the present invention in relation to the conveyance roller pair 4, and the conveyance roller pair 4 is in the relationship with the conveyance roller pair 3 in the present invention. It is an example of a “downstream roller pair”. The conveyance roller pair 4 is an example of the “upstream roller pair” in the present invention in relation to the discharge roller pair 5, and the discharge roller pair 5 is in the relationship with the conveyance roller pair 4 in the present invention. It is an example of a “downstream roller pair”.

  Further, guide members 8 and 9 for guiding the paper S along the conveyance direction (see the one-dot chain line with an arrow in FIG. 2) are disposed near the conveyance roller pairs 3 and 4, respectively. Further, a guide portion 10 for guiding the paper S along the transport direction (discharge direction) is also disposed in the vicinity of the discharge roller pair 5. The guide members 8 and 9 and the guide portion 10 are arranged so as to be separated from each other along the conveyance direction of the paper S. The guide member 8 is an example of the “upstream guide member” in the present invention in relation to the guide member 9, and the guide member 9 is in the “downstream guide” in the present invention in relation to the guide member 8. It is an example of “member”. Further, the guide member 9 is an example of the “upstream guide member” of the present invention in relation to the guide portion 10, and the guide portion 10 is related to the “downstream guide of the present invention in relation to the guide member 9. It is an example of “member”.

  The guide member 8 extends from the vicinity of the driven roller 3a of the pair of transport rollers 3 in a direction along the transport direction of the sheet S (see a one-dot chain line with an arrow in FIG. 2) (a direction from the lower left to the upper right in FIG. 2). Is formed. Further, the guide member 9 extends in the direction along the conveyance direction of the sheet S (the direction from the upper left to the lower right in FIG. 2) around the driven roller 4a so as to include the driven roller 4a of the conveyance roller pair 4. Is formed. In addition, the guide unit 10 includes a driving roller 5a of the discharge roller pair 5 in the intermediate member 11 (a member provided with the driving rollers 3a, 4a, and 5a) disposed in the vicinity of the central portion in the vertical direction (Z direction) of the printer unit 100. It is formed integrally with the intermediate member 11 so as to protrude and extend in the direction along the conveyance direction of the sheet S (the direction from the lower left to the upper right in FIG. 2) from the nearby corner 11a.

  Here, in the present embodiment, the guide member 8 crosses the tangent line 11 (see the thick dotted line in FIG. 2) of the conveyance roller pair 3 extending along the conveyance direction of the paper S (see the dashed line with the arrow in FIG. 2). Are arranged as follows. Further, the guide member 9 is disposed so as to cross the tangent line 12 (see the thick dotted line in FIG. 2) of the conveyance roller pair 4 extending along the conveyance direction of the sheet S. On the other hand, the guide unit 10 is disposed so as not to intersect the tangent line 13 (see the thick dotted line in FIG. 2) of the discharge roller pair 5 extending along the conveyance direction of the paper S. The tangent line 11 of the transport roller pair 3 and the tangent line 12 of the transport roller pair 4 intersect each other.

  Further, in the present embodiment, the guide member 8 is disposed on the downstream side with respect to the transport roller pair 3 and on the outer side with respect to the transport direction of the paper S (see the one-dot chain line with an arrow in FIG. 2). . Further, the guide member 9 is disposed on the upstream side with respect to the transport roller pair 4 and on the outer side with respect to the transport direction of the paper S. Further, the vicinity of the upstream end portion 9 a of the guide member 9 is arranged outside the vicinity of the downstream end portion 8 a of the guide member 8 in the transport direction of the paper S. The guide unit 10 is disposed on the inner side with respect to the transport direction of the paper S.

  In the present embodiment, the vicinity of the downstream end portion 8a of the guide member 8 and the vicinity of the upstream end portion 9a of the guide member 9 are arranged so as not to overlap each other. That is, as shown in FIG. 2, a thin dotted line l4 extending in the vertical direction (Z direction) through the vicinity of the end portion 8a on the downstream side of the guide member 8 and the vicinity of the end portion 9a on the upstream side of the guide member 9 It is configured to be separated from the thin dotted straight line 15 extending in the vertical direction through the horizontal direction (X direction) with a predetermined distance D1. The vicinity of the downstream end portion 8a of the guide member 8 and the vicinity of the upstream end portion 9a of the guide member 9 are arranged so as to be separated from each other at positions close to each other.

  In the present embodiment, an inclined surface 8b is formed on the surface of the guide member 9 near the downstream end portion 8a of the guide member 8 so as to be inclined away from the vicinity of the upstream end portion 9a of the guide member 9. Has been. Further, an inclined surface 9 b is formed on the surface on the guide member 8 side in the vicinity of the upstream end portion 9 a of the guide member 9 so as to be separated from the vicinity of the downstream end portion 8 a of the guide member 8. The inclined surfaces 8b and 9b are examples of the “first inclined surface” and the “second inclined surface” in the present invention, respectively.

  In the present embodiment, as shown in FIGS. 2 and 3, the discharge roller pair 5 is disposed so as to be in contact with the back surface S1 (see FIG. 2) opposite to the side on which the image of the paper S is printed. The driving roller 5a is configured to include a cylindrical member 50a (see FIG. 3) having a side surface in surface contact with the back surface S1 of the paper S. Further, the driven roller 5b of the discharge roller pair 5 disposed so as to come into contact with the surface S2 (see FIG. 2) on the side on which the image of the sheet S is printed is disposed so as to be orthogonal to the sheet S. Are formed so as to include two thin disk members 50b (see FIG. 3) having an outer peripheral portion having a concavo-convex shape.

  As shown in FIG. 3, the columnar member 50 a included in the drive roller 5 a is formed so as to extend in a direction (Y direction) orthogonal to the paper S discharge direction. Further, the two disk members 50b included in the driven roller 5b are disposed so as to be separated from each other with a gap D2 in the Y direction. The distance D2 in the Y direction between the two disk members 50b included in the driven roller 5b is smaller than the length L in the Y direction of the columnar member 50a included in the drive roller 5a. As shown in FIG. 2, the auxiliary roller 7 disposed between the printing unit 1 and the discharge roller pair 5 also has an uneven outer peripheral portion with a sharp tip, like the driven roller 5 b of the discharge roller pair 5. Have

  Next, a specific internal configuration of the scanner unit 200 according to an embodiment of the present invention will be described with reference to FIG.

  As shown in FIG. 4, the scanner unit 200 includes a reading unit 21 for performing image reading processing on the paper S. The scanner unit 200 is disposed in the vicinity of the paper feed unit 251, and feeds the paper S fed by the paper feed roller 22 to the reading unit 1 side. A pair of conveying rollers 23 and 24 for discharging, and a pair of discharging rollers 25 that are disposed in the vicinity of the discharging unit 252 and discharge the sheet S after reading. The sheet feeding roller 22, the conveying roller pair 23, 24, and the discharging roller pair 25 are such that the conveying path of the sheet S is curved (curved) inside the scanner unit 200 (the left portion in FIG. 4). It arrange | positions so that it may become the shape turned back (refer the dashed-two dotted line with the arrow of FIG. 4).

  The conveyance roller pair 23 and 24 and the discharge roller pair 25 are respectively driven by rotation of drive rollers 23a, 24a and 25a which are driven by a motor (not shown) as a power source, and drive rollers 23a, 24a and 25a. And rotating driven rollers 23b, 24b and 25b. The transport roller pair 23 is configured to sandwich the paper S transported from the upstream side (paper feed roller 22 side) and transport the paper S to the downstream side (transport roller pair 24 side). Further, the transport roller pair 24 is configured to sandwich the paper S transported from the upstream side (transport roller pair 23 side) and transport the paper S to the downstream side (discharge roller pair 25 side). Further, the discharge roller pair 25 is configured to sandwich and discharge the sheet S conveyed from the upstream side (conveyance roller pair 24 side). That is, the transport roller pair 23 is an example of the “upstream roller pair” of the present invention in relation to the transport roller pair 24, and the transport roller pair 24 is related to the transport roller pair 23 in the present invention. It is an example of a “downstream roller pair”. The conveyance roller pair 24 is an example of the “upstream roller pair” in the present invention in relation to the discharge roller pair 25, and the discharge roller pair 25 is in the relationship with the conveyance roller pair 24 in the present invention. It is an example of a “downstream roller pair”.

  Further, guide members 26 and 27 for guiding the sheet S along the transport direction (see the two-dot chain line with an arrow in FIG. 4) are disposed in the vicinity of the pair of transport rollers 23 and 24, respectively. . A guide member 28 for guiding the paper S along the transport direction (discharge direction) is also disposed in the vicinity of the discharge roller pair 25. These guide members 26, 27 and 28 are arranged so as to be separated from each other along the transport direction of the paper S. The guide member 26 is an example of the “upstream guide member” in the present invention in relation to the guide member 27, and the guide member 27 is in the “downstream guide in the present invention in relation to the guide member 26. It is an example of “member”. The guide member 27 is an example of the “upstream guide member” of the present invention in relation to the guide member 28, and the guide member 28 is the “downstream guide of the present invention in relation to the guide member 27. It is an example of “member”.

  Both guide members 26 and 27 are disposed so as to face an intermediate member 29 (a member provided with driving rollers 23a, 24a, and 25a) disposed in the vicinity of the central portion of the scanner unit 200 in the vertical direction (Z direction). ing. Further, the guide member 26 is in a direction (upper right in FIG. 4) along the transport direction of the sheet S (see the two-dot chain line with an arrow in FIG. 4) so as to face the outer surface of the intermediate member 29 in the vicinity of the drive roller 23a. In the direction from the left to the lower left). Further, the guide member 27 has a portion 27a extending in a direction along the transport direction of the sheet S (a direction from the lower right to the upper left in FIG. 4) so as to face the outer surface of the intermediate member 29 in the vicinity of the drive roller 24a. It is formed to have. In addition, the guide member 28 is arrange | positioned so that the base member 30 (member arrange | positioned under the discharge part 252) in which the driven roller 25b is provided may be opposed. The guide member 28 is formed on the outer surface of the intermediate member 29 in the vicinity of the driving roller 25a so as to extend in the direction along the transport direction of the paper S (the direction from the lower left to the upper right in FIG. 4).

  Here, in the present embodiment, the guide member 26 has a tangent line 16 (see the thick dotted line in FIG. 4) of the conveyance roller pair 23 extending along the conveyance direction of the paper S (see the two-dot chain line with the arrow in FIG. 4). It is arranged to cross. Further, the guide member 27 is arranged so as to cross a tangent line 17 (see a thick dotted line in FIG. 4) of the conveyance roller pair 24 extending along the conveyance direction of the paper S. Further, the guide member 28 is disposed so as to cross a tangent line 18 (see a thick dotted line in FIG. 4) of the discharge roller pair 25 extending along the transport direction of the paper S.

  In the present embodiment, the guide members 26 and 27 are both arranged on the outer side with respect to the conveyance direction of the paper S (see the two-dot chain line with an arrow in FIG. 4). The vicinity of the upstream end portion 27 a of the guide member 27 is arranged outside the vicinity of the downstream end portion 26 a of the guide member 26 in the transport direction of the paper S. The guide member 28 is disposed on the inner side with respect to the transport direction of the paper S.

  In the present embodiment, the vicinity of the downstream end portion 26 a of the guide member 26 and the vicinity of the upstream end portion 27 a of the guide member 27 are arranged so as not to overlap each other. That is, as shown in FIG. 4, a thin dotted line l9 extending in the horizontal direction (X direction) through the vicinity of the end portion 26a on the downstream side of the guide member 26 and the vicinity of the end portion 27a on the upstream side of the guide member 27 It is configured to be separated from the thin dotted straight line l10 extending in the X direction through the vertical direction (Z direction) with a predetermined distance D3. The vicinity of the end portion 26a on the downstream side of the guide member 26 and the vicinity of the end portion 27a on the upstream side of the guide member 27 are arranged so as to be separated from each other at positions close to each other.

  In the present embodiment, as described above, the guide members 8 and 9 of the printer unit 100 are respectively connected to the tangent line 11 of the conveyance roller pair 3 and the tangent line 12 of the conveyance roller pair 4 (see the thick dotted line in FIG. 2). To cross The guide members 26, 27, and 28 of the scanner unit 200 are respectively connected to the tangent line 16 of the conveyance roller pair 23, the tangent line 17 of the conveyance roller pair 24, and the tangent line 18 of the discharge roller pair 25 (thick dotted lines in FIG. 4). (See reference). Accordingly, the conveyance path of the sheet S in the printer unit 100 (FIG. 2) can be easily performed by the guide members 8, 9, 27, 28, and 29 arranged so as to cross the tangents l1, l2, l6, l7, and l8, respectively. The one-dot chain line with arrows) and the conveyance path of the paper S in the scanner unit 200 (see the two-dot chain line with arrows in FIG. 4) can be curved into a curved surface (curved shape). As a result, unlike the case where the conveyance path of the paper S is configured by a plurality of linearly extending conveyance paths, the conveyance path of the paper S is folded back while smoothly conveying the paper S along the curved conveyance path. Accordingly, the size of the inkjet multifunction peripheral 1000 including the printer unit 100 and the scanner unit 200 can be reduced.

  Further, by arranging the guide members 8 and 9 of the printer unit 100 (the guide members 26 and 27 of the scanner unit 200) so as to be separated from each other, the vicinity of the end portion 8a (26a) on the downstream side of the guide member 8 (26). Unlike the case where the vicinity of the upstream end portion 9a (27a) of the guide member 9 (27) contacts each other, the downstream end portion 8a (26a) of the guide member 8 (26) and the guide member 9 (27 ) Upstream end portion 9a (27a) does not need to be extended to a position where it comes into contact with guide member 9 (27) and guide member 8 (26), respectively, so that guide member 8 (26) and guide member 9 Each of the lengths of (27) can be shortened, which also reduces the size of the inkjet multifunction peripheral 1000 including the printer unit 100 and the scanner unit 200. It is possible.

  In the present embodiment, as described above, the vicinity of the upstream end portion 9 a of the guide member 9 of the printer unit 100 (the vicinity of the upstream end portion 27 a of the guide member 27 of the scanner unit 200) is connected to the guide member 8. It is arranged outside the vicinity of the downstream end portion 8a (the vicinity of the downstream end portion 26a of the guide member 26). Accordingly, the vicinity of the upstream end portion 9a (27a) of the guide member 9 (27) is different from the case where the vicinity of the downstream end portion 8a (26a) of the guide member 8 (26) is disposed. The leading edge of the sheet S conveyed downstream from the guide member 8 (26) comes into contact with the vicinity of the upstream end 9a (27a) of the guide member 9 (27). Proceeding in a direction deviating from the transport direction can be suppressed. As a result, it is possible to suppress the occurrence of a paper jam even when the conveyance path of the paper S is curved in a curved shape.

  In the present embodiment, as described above, the vicinity of the downstream end portion 8a of the guide member 8 of the printer unit 100 (the vicinity of the downstream end portion 26a of the guide member 26 of the scanner unit 200) and the guide member 9 The vicinity of the upstream end portion 9a (the vicinity of the upstream end portion 27a of the guide member 27) is disposed so as not to overlap each other. Thus, the vicinity of the upstream end portion 9a (27a) of the guide member 9 (27) can be surely arranged outside the vicinity of the downstream end portion 8a (26a) of the guide member 8 (26). Therefore, even when the conveyance path of the sheet S is curved in a curved surface shape, the leading end of the sheet S conveyed downstream from the guide member 8 (26) is the end 9a on the upstream side of the guide member 9 (27). (27a) It is possible to reliably suppress the occurrence of a paper jam due to contact with the vicinity.

  In the present embodiment, as described above, the vicinity of the downstream end portion 8a of the guide member 8 of the printer unit 100 (the vicinity of the downstream end portion 26a of the guide member 26 of the scanner unit 200) and the guide member 9 The vicinity of the upstream end portion 9a (the vicinity of the upstream end portion 27a of the guide member 27) is arranged at a position close to each other so as not to overlap each other. As a result, when the vicinity of the downstream end portion 8a (26a) of the guide member 8 (26) and the vicinity of the upstream end portion 9a (27a) of the guide member 9 (27) are arranged at a large distance from each other. Unlike the case, a large gap is prevented between the vicinity of the downstream end 8a (26a) of the guide member 8 (26) and the vicinity of the upstream end 9a (27a) of the guide member 9 (27). can do. As a result, the leading end of the sheet S conveyed downstream from the guide member 8 (26) is near the downstream end 8a (26a) of the guide member 8 (26) and upstream of the guide member 9 (27). It is possible to easily suppress the occurrence of a paper jam due to entering the gap between the side end 9a (27a) and the vicinity thereof.

  Further, in the present embodiment, as described above, the slope that inclines away from the vicinity of the upstream end portion 9a of the guide member 9 on the surface on the guide member 9 side in the vicinity of the downstream end portion 8a of the guide member 8. In addition to forming the surface 8b, an inclined surface 9b is formed on the surface of the guide member 8 near the upstream end portion 9a of the guide member 9 so as to be inclined away from the vicinity of the downstream end portion 8a of the guide member 8. . Thereby, by forming the inclined surfaces 8b and 9b on the guide members 8 and 9, respectively, the vicinity of the end portion 9a on the upstream side of the guide member 9 is more reliably located near the end portion 8a on the downstream side of the guide member 8. Can be placed on the outside. As a result, even when the conveyance path of the sheet S is curved in a curved surface shape, the leading end of the sheet S conveyed downstream from the guide member 8 comes into contact with the vicinity of the upstream end 9 a of the guide member 9. This can more reliably suppress the occurrence of a paper jam.

  In the present embodiment, as described above, the driven roller 5b of the discharge roller pair 5 arranged so as to contact the surface S2 (see FIG. 2) on the side on which the image of the paper S is printed has a sharp tip. Further, a thin disk member 50b (see FIG. 3) having an uneven outer peripheral portion is included. This reduces the contact area between the driven roller 5b and the surface S2 on the side on which the image of the paper S is printed, unlike the case where the driven roller 5b is configured by a thick disk member having no irregularities on the outer periphery. Therefore, it is possible to suppress the quality of the image from being degraded by rubbing the driven roller 5 on the surface S2 on the side where the image of the paper S is printed.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the above-described embodiment, the printer unit and the scanner unit included in the inkjet multifunction peripheral are shown as an example of the paper conveyance device of the present invention, but the present invention is not limited to this. The present invention can also be applied to a general paper conveying apparatus such as a scanner apparatus and a printer apparatus that operate independently without being included in a multifunction peripheral.

  In the above embodiment, the guide members 8 and 9 are arranged so as to cross the tangent line 11 of the conveyance roller pair 3 and the tangent line 12 of the conveyance roller pair 4 (see the thick dotted line in FIG. 2), while the guide portion 10 is disposed. Although the printer unit 100 is shown so as not to intersect the tangent line 13 (see the thick dotted line in FIG. 2) of the discharge roller pair 5, the present invention is not limited to this. In the present invention, all of the guide members 8, 9 and the guide portion 10 may be arranged so as to cross the tangents 11, 12, and 13 respectively. In the present invention, only the guide member 8 may be disposed so as to cross the tangent line 11, and the guide member 9 and the guide portion 10 may be disposed so as not to intersect the tangent lines 12 and 13, respectively.

  Similarly, in the above embodiment, the guide members 26, 27 and 28 are respectively connected to the tangent line 16 of the transport roller pair 23, the tangent line 17 of the transport roller pair 24, and the tangent line 18 of the discharge roller pair 25 (thick dotted lines in FIG. 4). Although the scanner unit 200 is shown so as to cross the reference), the present invention is not limited to this. In the present invention, only the guide member 26 may be disposed so as to cross the tangent line l6, and the guide members 27 and 28 may be disposed so as not to intersect the tangent lines l7 and l8, respectively.

  Further, in the above embodiment, the vicinity of the upstream end portion 9a of the guide member 9 is closer to the conveyance direction of the paper S than the vicinity of the downstream end portion 8a of the guide member 8 (see the one-dot chain line with arrows in FIG. 2). Although the printer unit 100 arranged on the outside is shown, the present invention is not limited to this. In the present invention, the vicinity of the downstream end portion 8 a of the guide member 8 and the vicinity of the upstream end portion 9 a of the guide member 9 may be arranged at the same position with respect to the transport direction of the paper S.

  Similarly, in the above embodiment, the vicinity of the upstream end portion 27a of the guide member 27 is closer to the conveyance direction of the paper S than the vicinity of the downstream end portion 26a of the guide member 26 (see the two-dot chain line with arrows in FIG. 4). However, the present invention is not limited to this. In the present invention, the vicinity of the downstream end portion 26 a of the guide member 26 and the vicinity of the upstream end portion 27 a of the guide member 27 may be arranged at the same position with respect to the transport direction of the paper S.

  In the above embodiment, the printer unit 100 is illustrated in which the vicinity of the downstream end portion 8a of the guide member 8 and the vicinity of the upstream end portion 9a of the guide member 9 are arranged so as not to overlap each other. The invention is not limited to this. In the present invention, the vicinity of the downstream end portion 8 a of the guide member 8 and the vicinity of the upstream end portion 9 a of the guide member 9 may be arranged to overlap each other.

  Similarly, in the above-described embodiment, the scanner unit 200 in which the vicinity of the downstream end portion 26a of the guide member 26 and the vicinity of the upstream end portion 27a of the guide member 27 are arranged so as not to overlap each other is shown. The present invention is not limited to this. In the present invention, the vicinity of the end portion 26a on the downstream side of the guide member 26 and the vicinity of the end portion 27a on the upstream side of the guide member 27 may be arranged so as to overlap each other.

1 Printing part 3, 4, 23, 24 Conveying roller pair (upstream roller pair, downstream roller pair)
5, 25 Discharge roller pair (downstream roller pair)
5a Drive roller (discharge roller)
5b driven roller 50b disk member 8, 9, 26, 27 guide member (upstream guide member, downstream guide member)
8b Inclined surface (first inclined surface)
9b inclined surface (second inclined surface)
10 Guide part (downstream guide member)
28 Guide member (downstream guide member)
100 Printer section (paper transport device)
200 Scanner unit (paper transport device)
S paper

Claims (7)

An upstream roller pair and a downstream roller pair that are arranged so as to sandwich the paper and transport the sandwiched paper in a predetermined transport direction;
An upstream guide member and a downstream guide member arranged to be separated from each other in the vicinity of the upstream roller pair and the downstream roller pair, and for guiding the paper along the transport direction;
A structure in which the upstream guide member is disposed so as to cross a tangent of the upstream roller pair extending along the transport direction, and the downstream so as to cross a tangent of the downstream roller pair extending along the transport direction. A sheet in which the arrangement positions of the upstream guide member and the downstream guide member with respect to the upstream roller pair and the downstream roller pair are set so as to include at least one of the structure in which the side guide member is arranged Conveying device.   The upstream guide member is disposed so as to cross at least the tangent line of the upstream roller pair extending along the transport direction, and at least the upstream guide member is in the transport direction in the vicinity of the upstream roller pair. The sheet conveying device according to claim 1, wherein the sheet conveying device is arranged so as to extend in a direction intersecting with the sheet. The upstream guide member is disposed on the downstream side with respect to the upstream roller pair and on the outer side with respect to the transport direction, and the downstream guide member is disposed on the downstream roller pair. Arranged on the upstream side and on the outside with respect to the conveying direction,
3. The sheet according to claim 1, wherein a vicinity of an upstream end portion of the downstream guide member is arranged on an outer side with respect to the transport direction than a downstream end portion of the upstream guide member. Conveying device.   4. The sheet according to claim 3, wherein the vicinity of the downstream end of the upstream guide member and the vicinity of the upstream end of the downstream guide member are spaced apart from each other so as not to overlap each other. Conveying device.   The vicinity of the downstream end of the upstream guide member and the vicinity of the upstream end of the downstream guide member are spaced apart from each other so as not to overlap each other. Item 5. The paper conveying device according to Item 4. A first inclined surface is formed on the surface on the downstream guide member side in the vicinity of the downstream end portion of the upstream guide member so as to be inclined away from the vicinity of the upstream end portion of the downstream guide member. And
On the surface on the upstream guide member side in the vicinity of the upstream end portion of the downstream guide member, a second inclined surface that is inclined so as to be separated from the vicinity of the downstream end portion of the upstream guide member is formed. The sheet conveying device according to claim 3, wherein A printing unit for printing an image on the paper;
The downstream roller pair is disposed so as to contact a surface of the paper opposite to the side on which the image is printed, and a discharge roller that is rotatable in a direction of discharging the paper, and the image of the paper. And a driven roller that is arranged so as to come into contact with the printed side surface and rotates with the discharge roller,
The said driven roller is arrange | positioned so that it may orthogonally cross with respect to the said paper, and it is comprised so that the thin-walled disk member which has an uneven | corrugated-shaped outer peripheral part may be included. The paper conveying apparatus as described.

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