JP7367737B2 - image recording device - Google Patents

Description

The present invention relates to an image recording apparatus that records an image by conveying a sheet along a conveyance path.

2. Description of the Related Art An image recording apparatus is known in which a conveyance path is provided inside an apparatus housing and an image is recorded on a sheet conveyed along the conveyance path. An opening is formed in the device casing to allow a user to access the conveyance path for maintenance and to eliminate paper jams in the conveyance path, and the opening can be opened and closed by a cover. Furthermore, a configuration is known in which the nip between a pair of transport rollers is released in conjunction with opening of the cover (Patent Document 1).

Japanese Patent Application Publication No. 2013-184754

The nip position between the pair of conveying rollers affects the direction in which the sheet is conveyed and the conveying distance, so it is desirable that the nip position be accurately positioned. However, as mentioned above, in a configuration in which the nip between the pair of conveyor rollers is released in conjunction with the opening of the cover, the nip position of the pair of conveyor rollers becomes unstable when the cover is closed, and the direction in which the sheet is conveyed becomes unstable. There was a problem that the conveyance distance became unstable.

The present invention has been made in view of the above problems, and its purpose is to separate the first roller and the second roller in conjunction with the opening of the guide member, and to separate the second roller when the guide member is closed. The object of the present invention is to provide a means for accurately positioning a roller with respect to a first roller.

(1) An image recording device according to the present invention includes a casing having a conveyance path and a frame, a recording section that records an image on a sheet conveyed on the conveyance path, and a direction in which the recording section faces the conveyance direction in the conveyance path. a first roller disposed on the upstream side of the conveyance path; a second roller disposed opposite to the first roller; and a second roller disposed on the upstream side of the recording section in the conveyance direction, a guide member that is rotatable to a first position that defines the transport path and a second position that opens the conveyance path; a roller holder that is connected to the guide member and supports the second roller; The roller holder includes a biasing member that biases the second roller toward the first roller, and an engagement member provided on the roller holder and capable of engaging with the frame. In the roller holder, the engaging member engages with the frame when the guide member is in the first position, so that the second roller is brought into contact with the first roller by the urging force of the urging member. They are positioned at a third position where they are in contact with each other.

When the guide member is in the second position, the conveyance path is opened and the second roller is separated from the first roller. When the guide member is in the first position, the engaging member engages with the frame to position the roller holder in the third position. When the roller holder is in the third position, the second roller is urged by the urging member and comes into contact with the first roller.

(2) Preferably, the frame supports the recording section.

Thereby, the nip position between the first roller and the second roller can be accurately positioned with respect to the recording section.

(3) Preferably, the frame includes a first contact surface that contacts the recording section, and a second contact surface that is opposite to the first contact surface and that contacts the engagement member. has.

(4) Preferably, the first roller is supported by a connecting frame connected to the frame.

This makes the relative positional relationship between the first roller and the second roller more accurate.

(5) Preferably, the roller holder is rotatably connected to the guide member, and when the guide member is in the second position, the roller holder is radially outward relative to the rotation locus of the guide member. The fourth position is pivotable to extend to a fourth position.

When the roller holder is in the fourth position, the guide member opens the access path to the conveyance path.

(6) Preferably, the guide member is positioned at the first position by coming into contact with the frame.

Thereby, the guide member is accurately positioned at the first position.

(7) Preferably, the frame has an opening that engages with the engagement member when the guide member is in the first position.

(8) Preferably, the roller holder supports the plurality of second rollers at a distance from each other in the axial direction of the first roller.

(9) Preferably, the roller holder supports the engaging member so as to be movable between an engaging position where the engaging member engages with the frame and a retracted position where the engaging member does not engage with the frame; , which is interposed between the roller holder and the engagement member to urge the engagement member to the engagement position.

(10) Preferably, the axis of the second roller is located downstream of the axis of the first roller in the transport direction when the guide member is in the first position.

Thereby, it is possible to generate a biasing force that positions the guide member at the first position and positions the roller holder at the third position.

According to the present invention, the first roller and the second roller are separated in conjunction with the opening of the guide member, and the second roller is accurately positioned with respect to the first roller when the guide member is closed. .

FIG. 1 is a perspective view of a multifunction device 10 that is an example of an embodiment of the present invention. FIG. 2 is a longitudinal sectional view showing the internal structure of the printer unit 11 when the outer guide member 18 is in the first position and the roller holder 85 is in the third position. FIG. 3 is an enlarged view of the vicinity of the roller holder 85 in FIG. 2. FIG. 4 is a longitudinal cross-sectional view showing the internal structure of the printer unit 11 when the outer guide member 18 is closer to the second position than in FIG. FIG. 5 is a longitudinal sectional view showing the internal structure of the printer unit 11 when the outer guide member 18 is closer to the second position than in FIG. FIG. 6 is a longitudinal sectional view showing the internal structure of the printer unit 11 when the outer guide member 18 is in the second position and the roller holder 85 is in the fourth position. FIG. 7 is a perspective view of the rear side of the printer section 11. As shown in FIG.

Embodiments of the present invention will be described below with reference to the drawings as appropriate. Note that the embodiments described below are merely examples of the present invention, and it goes without saying that the embodiments of the present invention can be modified as appropriate without changing the gist of the present invention. In the following explanation, the vertical direction 7 is defined based on the state in which the multifunction device 10 is installed so that it can be used (the state shown in FIG. 1), and the front-back direction is defined with the side where the opening 13 is provided as the front side (front side). 8 is defined, and a left-right direction 9 is defined when viewing the multifunction device 10 from the front side (front).

[Overall structure of multifunction device 10]
As shown in FIG. 1, the multifunction device 10 includes a housing 14 that has an approximately rectangular parallelepiped appearance. The multifunction device 10 has various functions such as a facsimile function and a print function.

A scanner section 12 is provided at the top of the housing 14. Although the scanner section 12 is configured as a so-called flatbed scanner, a detailed explanation of the internal configuration of the scanner section 12 will be omitted here.

A printer unit 11 (an example of the image recording device of the present invention) is provided at the bottom of the housing 14.
The printer unit 11 has a print function that records an image on recording paper using an inkjet method. Inside the housing 14, a base frame 83, a pair of side frames 55, guide rails 56 and 57, a feeding tray 20, a feeding section 16, a conveying path 65, a recording section 24, each pair of rollers 59 and 44, and each guide. Members 18, 19, 31, roller holder 85, abutting member 41, etc. are arranged.

[flame]
As shown in FIG. 7, at least three types of frames (a base frame 83, a pair of side frames 55, and guide rails 56 and 57) are arranged within the housing 14.

The base frame 83 is a resin frame that forms the lower skeleton of the printer section 11. A pair of side frames 55 (an example of a connecting frame of the present invention) are arranged at intervals in the left-right direction 9. The side frame 55 is a metal frame. The side frames 55 are arranged on the right and left sides of the conveyance path 65. Side frame 55 is supported by base frame 83. The side frame 55 is fixed to the base frame 83 with screws or the like.

The guide rails 56 and 57 are arranged at intervals in the front-rear direction 8. The guide rail 56 is an example of the frame of the present invention. The guide rails 56 and 57 are metal frames. The guide rails 56 and 57 are supported by a pair of side frames 55. A protrusion 69 formed on the side frame 55 is inserted into an opening 68 formed on the guide rails 56 and 57. Thereby, the side frame 55 is connected to the guide rails 56 and 57. Note that the side frame 55 and the guide rails 56 and 57 may be connected to each other by a method other than the above, for example, by fixing with screws. The guide rails 56, 57 will be explained in more detail later.

[Feeding tray 20]
As shown in FIG. 1, an opening 13 is formed in the front of the printer section 11. As shown in FIG. The feeding tray 20 can be inserted into and removed from the printer section 11 through the opening 13 along the front-rear direction 8 . The feeding tray 20 is arranged on the lower side (bottom side) of the housing 14 when inserted into the printer section 11 . The feeding tray 20 is a box-shaped member with an open upper side. The bottom plate 22 (see FIG. 2) of the feeding tray 20 supports recording sheets in a stacked state.

A discharge tray 21 is supported on the front side of the feed tray 20. The discharge tray 21 moves in the front-rear direction 8 together with the feed tray 20. A recording sheet on which an image has been recorded by the recording section 24 is discharged onto the upper surface of the discharge tray 21 .

[Feeding section 16]
As shown in FIG. 2, the feeding section 16 is provided above the feeding tray 20 inserted into the printer section 11 and below the recording section 24. The feeding section 16 includes a feeding roller 25, a feeding arm 26, and a drive transmission mechanism 27. The feeding roller 25 is pivotally supported at the tip of the feeding arm 26. The feeding arm 26 rotates in the direction of an arrow 29 about a support shaft 28 provided at its base end. Thereby, the feed roller 25 can come into contact with and separate from the feed tray 20 or the recording paper supported by the feed tray 20.

The feeding roller 25 is rotated by the driving force of a motor 78 (see FIG. 7) being transmitted by a driving force transmitting mechanism 27 formed by meshing a plurality of gears. As a result, among the recording sheets supported by the bottom plate 22 , the uppermost recording sheet that is in contact with the feeding roller 25 is fed along the conveyance path 65 .

Note that the feeding roller 25 may be driven by a motor other than the motor 78. The drive transmission mechanism 27 is not limited to a configuration in which a plurality of gears are meshed with each other, and may be a belt that is stretched between the support shaft 28 and the shaft of the feeding roller 25, for example.

[Transport path 65]
As shown in FIG. 2, a conveyance path 65 extends from the rear end of the feed tray 20. The conveyance path 65 has a curved portion 33 and an extended portion 34 . The curved portion 33 extends upward and forward from the rear end of the feeding tray 20 while being curved. The extending portion 34 is continuous with the upper end of the curved portion 33 and extends in the front-rear direction 8.

The curved portion 33 is defined by the outer guide member 18 (an example of the guide member of the present invention), the roller holder 85, the inclined plate 23, and the inner guide member 19, which face each other at a predetermined interval. The extending portion 34 is defined by the roller holder 85, the recording section 24, the upper guide member 31, the inner guide member 19, and the platen 42. In other words, the roller holder 85 defines at least a portion of the curved portion 33 and the extended portion 34 .
Note that the roller holder 85 may define at least a portion of only one of the curved portion 33 and the extended portion 34.

The recording paper supported by the feed tray 20 is fed to the inclined plate 23 of the feed tray 20 by a feed roller 25 . The advancing direction of the recording paper is changed by the inclined plate 23, and the recording paper enters the curved portion 33. The recording paper that has entered the curved portion is conveyed in a U-turn from the bottom to the top of the curved portion 33 and reaches a pair of conveyance rollers 59 . The recording paper sandwiched between the pair of conveyance rollers 59 is conveyed in the front-rear direction 8 with the extending portion 34 directed toward the recording section 24 . The recording paper that has reached the position immediately below the recording section 24 has an image recorded thereon. The recording paper on which the image has been recorded is conveyed in the front-rear direction 8 through the extending portion 34 and is discharged onto the discharge tray 21 . As described above, the recording paper is conveyed along the conveyance direction 15 shown by the dashed line arrow in FIG.

[Recording section 24]
As shown in FIG. 2, the recording section 24 is provided above the extending portion 34. As shown in FIG. A platen 42 is provided below the recording section 24 and at a position facing the recording section 24 . The platen 42 includes a rib 43 that stands upright from its top surface and extends in the front-rear direction 8. A plurality of ribs 43 are arranged at intervals in the left-right direction 9. The ribs 43 support the recording paper being conveyed through the extending portion 34 of the conveyance path 65 .

The recording section 24 includes a carriage 40 and a recording head 38. The carriage 40 is supported by guide rails 56 and 57 so as to be able to reciprocate in the left-right direction 9 . The rear end portion 40A of the carriage 40 is in contact with the upper surface 99 of the guide rail 56 (an example of the first contact surface of the present invention). The front end 40B of the carriage 40 is in contact with the upper surface 100 of the guide rail 57.

The recording head 38 is mounted on a carriage 40. Ink is supplied to the recording head 38 from an ink cartridge (not shown). A plurality of nozzles (not shown) are formed on the lower surface 32 of the recording head 38. While the carriage 40 is moving in the left-right direction 9, the recording head 38 discharges ink droplets from the nozzles toward the platen 42. As a result, an image is recorded on the recording paper supported by the platen 42 while being conveyed along the extending portion 34 .

[Abutting member 41]
As shown in FIGS. 2 and 3, the contact member 41 is arranged on the upstream side of the recording section 24 in the conveyance direction 15 in the conveyance path 65. A plurality of contact members 41 are arranged at intervals in the left-right direction 9. Each contact member 41 is arranged between adjacent ribs 43 . A base end portion 45 of the contact member 41 is located behind the pair of conveyance rollers 59 and supported by a roller holder 85 . The contact member 41 extends downward and forward from the base end 45 while being curved.

The contact member 41 extends between the nozzle and the pair of conveyance rollers 59 in the conveyance direction 15 . The tip portion 46 of the contact member 41 is located below the upper end of the rib 43. The leading end portion 46 comes into contact with the upper surface of the recording paper conveyed through the extending portion 34 . The recording paper is made into a continuous wave shape in the left-right direction 9 by being brought into contact with the leading end 46 from above and against the ribs 43 from below.

[Transport roller pair 59 and discharge roller pair 44]
As shown in FIGS. 2 and 3, a pair of conveying rollers 59 is disposed on the upstream side of the recording section 24 in the extending portion 34 in the conveying direction 15. As shown in FIGS. A pair of discharge rollers 44 is disposed downstream of the recording unit 24 in the extending portion 34 in the transport direction 15 .

The conveyance roller pair 59 includes a conveyance roller 60 (an example of a first roller of the present invention) disposed below the extension portion 34 and a pinch roller disposed above the extension portion 34 facing the conveyance roller 60. 61 (an example of the second roller of the present invention). The conveyance roller 60 rotates with the left-right direction 9 as an axial direction. A plurality of pinch rollers 61 are provided at intervals in the left-right direction 9. Each pinch roller 61 rotates with the left-right direction 9 as an axial direction. Each pinch roller 61 is pressed against the conveyance roller 60 by a coil spring 73.

The conveyance roller 60 is rotatably supported by a pair of side frames 55 (see FIG. 7). The pinch roller 61 is rotatably supported by a roller holder 85.

The discharge roller pair 44 includes a discharge roller 62 disposed below the extension portion 34 and a spur roller 63 disposed above the extension portion 34 facing the discharge roller 62. The discharge roller 62 and the spur roller 63 rotate with the left-right direction 9 as an axial direction. The spur roller 63 is pressed against the discharge roller 62 by an elastic member (not shown). The discharge roller 62 is rotatably supported by a pair of side frames 55 (see FIG. 7). The spur roller 63 is rotatably supported by the upper guide member 31.

The conveyance roller 60 and the discharge roller 62 are rotated by a driving force transmitted from a motor 78 (see FIG. 7). When the conveyance roller 60 rotates while the recording paper is held between the conveyance roller pair 59, the recording paper is conveyed in the conveyance direction 15 toward the platen 42 by the conveyance roller pair 59. Furthermore, when the ejection roller 62 rotates while the recording paper is being held between the ejection roller pair 44, the recording paper is conveyed in the transport direction 15 toward the ejection tray 21 by the ejection roller pair 44. Note that the transport roller 60 and the discharge roller 62 may be driven by a motor other than the motor 78.

[Guide rails 56, 57]
The guide rails 56 and 57 shown in FIG. 2 are generally plate-shaped members that extend in the front-rear direction 8 and the left-right direction 9. As shown in FIGS. 2, 3, and 7, the guide rail 56 includes a rear bent portion 53 bent upward at the rear end. As shown in FIG. 2, the guide rails 56 and 57 are arranged with the guide rail 56 on the rear side and the guide rail 57 on the front side. The carriage 40 is arranged to straddle guide rails 56 and 57.

A known belt mechanism (not shown) is arranged on the upper surface of the guide rail 57. The belt mechanism includes pulleys arranged at both left and right ends of the guide rail 57, and a belt spanned over the pulleys. The belt is connected to the carriage 40 and a carriage drive motor (not shown) that applies driving force to the carriage 40. When the carriage drive motor is driven, driving force in the left-right direction 9 is transmitted to the carriage 40 via the belt mechanism. Thereby, the carriage 40 reciprocates in the left-right direction 9.

[Guide member 30]
As shown in FIG. 2, the guide member 30 is arranged upstream of the recording section 24 in the transport direction 15. The guide member 30 includes an outer guide member 18 and a roller holder 85. The outer guide member 18 is supported by a base frame 83 (see FIG. 7) so as to be rotatable in the direction of an arrow 91 about a shaft 90 that is provided on the upstream side in the conveyance direction 15 and extends in the left-right direction 9. There is. Thereby, the guide member 30 rotates with the upstream side in the conveyance direction 15 as an axis and the downstream side in the conveyance direction 15 as the rotation end side.

The outer guide member 18 is provided on the axis 90 side of the guide member 30 (upstream side of the curved portion 33 in the transport direction 15). The roller holder 85 is provided on the rotating tip side of the guide member 30 (downstream side of the curved portion 33 in the conveying direction 15).

The outside of the curved portion 33 is defined by the outside guide member 18, the roller holder 85, and the inclined plate 23. Note that the outside of the curved portion 33 may be defined only by the outside guide member 18 and the roller holder 85. As described above, the guide member 30 defines at least a portion of the outside of the curved portion 33.

[Outer guide member 18]
As shown in FIG. 2, the outer guide member 18 is rotatable about an axis 90 in the direction of an arrow 91. As shown in FIG. The shaft 90 protrudes outward from both ends of the outer guide member 18 in the left-right direction 9 at a position on the lower side (bottom side) of the housing 14 . The shaft 90 is supported by a bearing (not shown) of the housing 14, so that the outer guide member 18 is rotatably supported by the housing 14. In addition, in FIG. 7, illustration of the rotating tip side of the outer guide member 18 is omitted.

The outer guide member 18 includes a side wall 92 that forms part of the rear surface of the housing 14 and a guide portion 93 that is disposed in front of the side wall 92 and supported by the side wall 92. The guide portion 93 is a plate-shaped member whose curved portion 33 side is curved.

The outer guide member 18 pivots between a first position shown in FIG. 2 and a second position shown in FIG. When the outer guide member 18 is in the first position, the guide portion 93 defines the outside of the curved portion 33 . On the other hand, the outer guide member 18 opens the curved portion 33 when in the second position. The user of the multifunction device 10 can remove the recording paper stuck in the curved portion 33 by rotating the outer guide member 18 from the first position to the second position.

A convex portion 70 is formed at the rotating tip of the outer guide member 18 . The convex portions 70 are formed at the left and right ends of the outer guide member 18 . When the outer guide member 18 is in the first position, the protrusion 70 projects forward. At this time, the convex portion 70 is in contact with the rear bent portion 53 of the guide rail 56. Thereby, the position of the outer guide member 18 in the front-rear direction 8 is positioned at the first position.

[Roller holder 85]
As shown in FIGS. 2 and 3, the roller holder 85 is arranged below the guide rail 56. As shown in FIGS. The roller holder 85 is a member that is long in the left-right direction 9. The roller holder 85 rotatably supports each of the pinch rollers 61 on its front side.

A shaft 94 extending in the left-right direction 9 is provided at the rear end of the roller holder 85 . The roller holder 85 is connected to the outer guide member 18 by supporting the shaft 94 on the outer guide member 18 . The roller holder 85 is rotatable in the direction of an arrow 91 with respect to the housing 14 together with the outer guide member 18 . Further, as shown in FIG. 6, the roller holder 85 is rotatable in the direction of an arrow 95 about a shaft 94 with respect to the outer guide member 18. However, when the front end of the roller holder 85 is located ahead of the rear end of the guide rail 56 (for example, when the outer guide member 18 is in the first position), the rotation of the roller holder 85 is regulated by the guide rail 56. Ru.

The roller holder 85 rotates between a third position shown in FIG. 2 and a fourth position shown in solid lines in FIG.

As shown in FIGS. 2 and 3, when the outer guide member 18 is in the first position, the roller holder 85 is in the third position. When the roller holder 85 is in the third position, the rear side of the lower surface 96 of the roller holder 85 defines the outside of the curved portion 33, and the front side of the lower surface 96 of the roller holder 85 defines the upper side of the extending portion 34. When the roller holder 85 is in the third position, each pinch roller 61 faces the conveyance roller 60 and is in contact with the conveyance roller 60 from above.

When the pinch roller 61 and the conveyance roller 60 are in contact with each other, the axis 81 of the pinch roller 61 (a line extending in the left-right direction 9 passing through the center of the pinch roller 61, see FIG. 3) is aligned with the axis 80 of the conveyance roller 60. (a line extending in the left-right direction 9 passing through the center of the conveyance roller 60, see FIG. 3). As a result, the recording paper sandwiched by the pair of transport rollers 59 is transported diagonally downward and forward, and is pressed against the platen 42 . As a result, the distance between the recording paper supported by the platen 42 and the recording head 38 can be maintained constant.

As shown in FIG. 6, when the outer guide member 18 is in the second position, the roller holder 85 is in the position shown by the broken line (hereinafter also referred to as the fifth position) and the fourth position shown by the solid line. It can be rotated between The relative position of the roller holder 85 with respect to the outer guide member 18 when the roller holder 85 is in the fifth position is the relative position with respect to the outer guide member 18 when the roller holder 85 is in the third position (the position shown by the dashed line in FIG. 6). ) is slightly forward. Note that the roller holder 85 is restricted from rotating forward beyond the fifth position by a stopper (not shown) provided on the outer guide member 18. By rotating in the direction of arrow 97 from the third or fifth position, the roller holder 85 is positioned further back than the outer guide member 18 at the second position. The roller holder 85 at this time is in the fourth position. As shown in FIG. 6, the roller holder 85 in the fourth position moves along the rotation locus 88 (the arc centered on the axis 90) when the outer guide member 18 rotates in the direction of the arrow 97. extends radially outward.

[Coil spring 73 and engagement member 74]
As shown in FIGS. 2 and 3, the roller holder 85 is provided with a coil spring 73 and an engagement member 74. A plurality of coil springs 73 and engagement members 74 are provided at intervals in the left-right direction 9. Each coil spring 73 is supported by a roller holder 85, and each engagement member 74 is supported by a coil spring 73. Thereby, the coil spring 73 is interposed between the roller holder 85 and the engagement member 74.

The lower end of the coil spring 73 is in contact with the roller holder 85 , and the upper end of the coil spring 73 is in contact with the engagement member 74 . The lower surface of the engaging member 74 is in contact with the upper end of the coil spring 73. The upper surface of the engaging member 74 is in contact with the lower surface 98 of the guide rail 56 . A projection 75 is formed on the upper surface of the engagement member 74. On the other hand, an opening 76 is formed in the guide rail 56 at a position corresponding to each engaging member 74. The opening 76 does not have to be configured to be penetrated in the vertical direction 7. For example, the opening 76 may be a recess that is recessed from the lower surface 98 to the upper surface 99.

The engaging member 74 is movably supported by a roller holder 85 via a coil spring 73. Specifically, the engagement member 74 is moved between the engagement position shown in FIG. 2 and the retracted position shown in FIG. 4 located below the engagement position by the expansion and contraction of the coil spring 73. It is movable.

When the outer guide member 18 is in the first position and the roller holder 85 is in the third position, the protrusion 75 is inserted into the opening 76 and moved to the engagement position by being urged upward by the coil spring 73. As a result, the engaging member 74 and the guide rail 56 are engaged with each other. At this time, each coil spring 73 is in a contracted state shorter than its natural length. Thereby, the coil spring 73 urges each pinch roller 61 toward the conveyance roller 60 side. As a result, each pinch roller 61 is pressed against the conveyance roller 60. As will be described later, when the outer guide member 18 moves from the first position to the second position in the direction of arrow 97, the protrusion 75 comes out of the opening 76. As a result, the engaging member 74 moves to the retracted position.

In this embodiment, both the biasing member that biases the protrusion 75 upward and the biasing member that biases the pinch roller 61 toward the conveyance roller 60 are the coil springs 73 . However, the urging member that urges the protrusion 75 upward and the urging member that urges the pinch roller 61 toward the conveyance roller 60 may be different members.

[Rotating operation of guide member 30]
The rotation operation of the guide member 30 will be explained below. As shown in FIGS. 2 and 3, when the outer guide member 18 is in the first position, the roller holder 85 is in the third position.

When the outer guide member 18 is in the first position, the convex portion 70 is in contact with the rear bent portion 53 of the guide rail 56.

When the roller holder 85 is in the third position, the engagement member 74 is inserted into the opening 76 of the guide rail 56, and is in the engagement position. Thereby, the roller holder 85 is positioned at the third position. Note that the engaging member 74 inserted into the opening 76 is in contact with the front side surface 89 of the opening 76, as shown in FIG.

When the roller holder 85 is in the third position, the tip portion 46 of the contact member 41 is located below the position where the recording paper is held between the pair of transport rollers 59. When the roller holder 85 is in the third position, each pinch roller 61 is in contact with the conveyance roller 60 due to the urging force of the coil spring 73.

When the outer guide member 18 is rotated in the direction of arrow 91 from the first position to the second position, the roller holder 85 is rotated rearward together with the outer guide member 18. Then, the protrusion 75 of the engagement member 74 comes into contact with the rear side surface 17 of the opening 76 and presses it. As a result, the protrusion 75 receives a reaction force from the rear side surface 17. The coil spring 73 contracts due to the reaction force. This causes the engagement member 74 to move downward. As a result, as shown in FIG. 4, the protrusion 75 comes out of the opening 76, and the engagement between the engagement member 74 and the guide rail 56 is released.

When the outer guide member 18 is further rotated toward the second position, the protrusion 75 comes into contact with the lower surface 98 (an example of the second contact surface of the present invention) of the guide rail 56 due to the biasing force of the coil spring 73. While keeping this state, it moves backward along the lower surface 98. At this time, the engagement member 74 is in the retracted position below the engagement position. When the protrusion 75 moves rearward beyond the lower surface 98, the coiled spring 73, which had been contracted, returns to its natural length.

In the state shown in FIG. 4, the lower surface 96 of the roller holder 85 is supported by the inner guide member 19. The roller holder 85 is guided rearward along the surface of the inner guide member 19 on the extending portion 34 side. The contact member 41 and the pinch roller 61 are also guided rearward together with the roller holder 85. As a result, the pinch roller 61 is separated from the conveyance roller 60.

The lower surface 96 of the roller holder 85 guided rearward is separated from the surface of the inner guide member 19 on the side of the extending portion 34 and is supported by the surface of the inner guide member 19 on the side of the curved portion 33 . Here, the surface of the inner guide member 19 on the side of the curved portion 33 is curved diagonally downward toward the rear. Therefore, the more the roller holder 85 is guided rearward, the more it rotates downward due to its own weight. The rotation is regulated by the above-mentioned stopper. As a result, when the roller holder 85 moves backward from the predetermined position, it separates from the inner guide member 19 (see FIG. 5).

The outer guide member 18 reaches the second position by being further rotated toward the second position (see FIG. 6). At this time, the roller holder 85 is in the fifth position shown by the broken line in FIG. In this state, the roller holder 85 is rotatable in the direction of an arrow 97 toward a fourth position shown by a solid line in FIG.

When the outer guide member 18 is rotated from the state where the outer guide member 18 is in the second position and the roller holder 85 is in the fourth position (see FIG. 6) to the first position, first, the roller holder 85 is in the fourth position. It is rotated in the opposite direction to the arrow 97 from the fourth position to the fifth position.

Next, when the outer guide member 18 is rotated toward the first position in the direction of the arrow 91, the protrusion 75 contacts and presses the rear bent portion 53 of the guide rail 56. As a result, the protrusion 75 receives a reaction force from the rear bending portion 53. The coil spring 73 contracts due to the reaction force.
As a result, the engaging member 74 moves downward, and the protrusion 75 comes into contact with the lower surface 98 of the guide rail 56 (see FIG. 5). As a result, the engaging member 74 enters into the housing 14 from between the guide rail 56 and the inner guide member 19. At this time, the engaging member 74 is in the retracted position.

When the lower surface 96 of the roller holder 85 moves forward from the above-mentioned predetermined position, it comes into contact with the inner guide member 19 . Thereafter, the roller holder 85 is guided along the surface of the inner guide member 19 on the conveyance path 65 side (see FIG. 4).

When the outer guide member 18 is further rotated in the direction of the arrow 91 toward the first position, the convex portion 70 comes into contact with the rear bent portion 53 of the guide rail 56, and the first reach the position. At this time, the protrusion 75 is inserted into the opening 76 of the guide rail 56, the engagement member 74 is in the engagement position, and the roller holder 85 is in the third position. When the roller holder 85 is in the third position, the pinch roller 61 is in contact with the transport roller 60, and the contact member 41 can contact the recording paper being transported in the transport direction 15 from above.

As shown in FIG. 3, when the outer guide member 18 is in the first position, the axis 81 of the pinch roller 61 is located downstream of the axis 80 of the conveyance roller 60 in the conveyance direction 15.

[Effects of embodiment]
According to this embodiment, when the outer guide member 18 is in the second position, the conveyance path 65 is opened and the pinch roller 61 is separated from the conveyance roller 60. When the outer guide member 18 is in the first position, the engaging member 74 engages with the guide rail 56, and the roller holder 85 is positioned in the third position. When the roller holder 85 is in the third position, the pinch roller 61 is urged by the coil spring 73 and comes into contact with the conveyance roller 60 . As described above, according to the present embodiment, the conveying roller 60 and the pinch roller 61 are separated in conjunction with the opening of the outer guide member 18, and when the outer guide member 18 is closed, the pinch roller 61 is moved away from the conveying roller 60. accurately positioned against.

Further, according to the present embodiment, since the guide rail 56 supports the recording section 24, it is possible to accurately position the recording paper between the conveyance roller 60 and the pinch roller 61 with respect to the recording section 24.

Further, according to this embodiment, since the conveyance roller 60 is supported by the side frame 55, the relative positional relationship between the conveyance roller 60 and the pinch roller 61 becomes more accurate.

Further, according to the present embodiment, since the outer guide member 18 is rotatable to the second position, when the roller holder 85 is in the fourth position, the outer guide member 18 opens access to the conveyance path 65. The route becomes wider.

Furthermore, according to the present embodiment, the outer guide member 18 contacts the guide rail 56 when in the first position, so the outer guide member 18 is accurately positioned at the first position.

Further, according to the present embodiment, the axis 81 of the pinch roller 61 is located forward of the axis 80 of the conveyance roller 60 when the outer guide member 18 is in the first position. It is possible to generate a biasing force that positions the roller holder 85 at the third position.

[Modified example]
In the embodiment described above, in the pair of conveying rollers 59, the conveying roller 60 is provided on the lower side and the pinch roller 61 is provided on the upper side, but the conveying roller 60 is provided on the upper side and the pinch roller 61 is provided on the lower side. may be provided. In this case, the engaging member 74 is configured to engage with a frame (not shown) provided within the housing 14 that is separate from the guide rail 56.

In the embodiment described above, the roller holder 85 was connected to the outer guide member 18, but the roller holder 85 does not need to be connected to the outer guide member 18. In this case, the roller holder 85 is rotatably and detachably supported in the direction of the arrow 95 by another member (for example, the guide rail 56) provided in the housing 14 on the rear side.

10...Multifunction machine 11...Printer section 14...Housing 18...Outer guide member (guide member)
24... Recording section 56... Guide rail 60... Conveyance roller (first roller)
61...Pinch roller (second roller)
65... Conveyance path 73... Coil spring (biasing member)
74...Engagement member 85...Roller holder

Claims (11)

An image recording device including a recording section that records an image on a sheet conveyed on a conveyance path,
a casing having a frame;
a rotating member forming a side wall of the image recording device;
The rotating member is configured to be rotatable by a user between an open position in which the conveyance path is exposed to the outside and a closed position in which the conveyance path is not exposed to the outside;
a roller holder that is rotatably connected to the rotating member and has an engaging portion that is engageable with the frame;
a first roller disposed on the conveyance path;
a second roller disposed in the roller holder;
When the rotating member is in the closed position, the roller holder is positioned at a first position where the engaging portion engages with the frame and the second roller and first roller are in contact with each other;
When the rotating member is in the open position, the roller holder is located in a second position where the second roller and the first roller are separated ;
The rotating member is connected such that the roller holder rotates about a first axis parallel to the axis of the first roller, and the rotating member is connected to the rotating member so that the roller holder rotates about a first axis parallel to the axis of the first roller. is rotatable about two axes between the closed position where the first roller and the second roller are in contact with each other and the open position where the first roller and the second roller are separated;
In the image recording device, the roller holder is positioned by the engaging portion engaging with the frame when the rotating member is in the closed position.
The rotating member includes a portion that comes into contact with the casing,
The image recording device according to claim 1, wherein the rotating member is positioned at the closed position by the portion coming into contact with the housing.
The image recording apparatus according to claim 1 , wherein the roller holder includes a defining portion that defines the conveyance path.
There are multiple second rollers,
The image recording device according to any one of claims 1 to 3, wherein the plurality of second rollers are arranged at predetermined intervals along the direction in which the rotation axis of the first roller extends.
There are multiple second rollers,
The image recording device according to any one of claims 1 to 4, wherein the roller holder rotatably supports each of the plurality of second rollers.
The roller holder further includes a biasing member,
Claims 1 to 3, wherein when the roller holder is in the first position, the roller holder is urged downward by the urging member, thereby pressing the second roller against the first roller. The image recording device according to any one of Item 5.
The biasing member includes a first biasing member and a second biasing member,
The first biasing member biases the roller holder in a direction in which the second roller is pressed by the first roller when the roller holder is in the first position;
7. The image recording apparatus according to claim 6, wherein the second biasing member biases the second roller in a direction to press the first roller when the roller holder is in the first position.
The image recording device according to any one of claims 1 to 7, wherein when the roller holder is in the first position, the first axis is located above the axis of the first roller. .
The image recording device according to any one of claims 1 to 8, wherein when the roller holder is in the first position, the first axis is located above the axis of the second roller. .
2. The roller holder is located inside the housing when the rotating member is in the closed position, and is located outside the housing when the rotating member is in the open position. The image recording device according to claim 9.
The image recording device according to any one of claims 1 to 10, wherein a plurality of the engaging portions are provided at intervals in a direction parallel to the axis of the first roller.

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