JP6927379B2 - Image recording device - Google Patents

Description

The present invention relates to an image recording device that transports a sheet along a transport path and records an image.

An image recording device is known in which a transport path is provided inside the device housing and an image is recorded on a sheet transported along the transport path. The device housing is formed with an opening that allows the user to access the transport path in order to perform maintenance and eliminate paper jams in the transport path, and the opening can be opened and closed by a cover. Further, it is known that the nip of the transport roller pair is released in conjunction with the opening of the cover (Patent Document 1).

Japanese Unexamined Patent Publication No. 2013-184754

Since the nip position of the transfer roller pair affects the direction in which the sheet is conveyed and the transfer distance, it is desirable that the position is accurately positioned. However, as described above, in the configuration in which the nip of the transfer roller pair is released in conjunction with the opening of the cover, the nip position of the transfer roller pair when the cover is closed becomes unstable, and the direction in which the sheet is conveyed or There was a problem that the transport distance became unstable.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a second roller when the first roller and the second roller are separated from each other in conjunction with the opening of the guide member and the guide member is closed. An object of the present invention is to provide a means by which a roller can be accurately positioned with respect to a first roller.

(1) The image recording apparatus according to the present invention includes a housing having a transport path and a frame, a recording unit that records an image on a sheet transported through the transport path, and a transport direction from the recording unit in the transport path. A first roller arranged on the upstream side of the A guide member that can rotate to a specified first position and a second position that opens the transport path, a roller holder that is connected to the guide member and supports the second roller, and a roller holder that is provided on the roller holder. It includes an urging member that urges the second roller toward the first roller side, and an engaging member that is provided on the roller holder and can be engaged with the frame. The roller holder hits the second roller with the first roller by the urging force of the urging member by engaging the engaging member with the frame when the guide member is in the first position. It is positioned at the third position to be brought into contact.

When the guide member is in the second position, the transport 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 and the roller holder is positioned 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 unit.

As a result, the nip positions of the first roller and the second roller can be accurately positioned with respect to the recording unit.

(3) Preferably, the frame has a first contact surface that comes into contact with the recording unit, and a second contact surface that is on the opposite side of the first contact surface and that comes into contact with the engaging member. Has.

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

As a result, the relative positional relationship between the first roller and the second roller becomes 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 outer side in the radial direction with respect to the rotation locus of the guide member. It can be rotated to the fourth position extending to.

When the roller holder is in the fourth position, the access path to the transport path opened by the guide member is widened.

(6) Preferably, the guide member is positioned at the first position by abutting on the frame.

As a result, the guide member is accurately positioned at the first position.

(7) Preferably, the frame has an opening in which the guide member engages with the engaging member at the first position.

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

(9) Preferably, the roller holder movably supports the engaging member at an engaging position where the engaging member engages with the frame and a retracting position where the engaging member does not engage with the frame. , The engaging member is urged to the engaging position by being interposed between the roller holder and the engaging member.

(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.

As a result, it is possible to generate an urging force for positioning the guide member at the first position and positioning the roller holder at the third position.

According to the present invention, the first roller and the second roller are separated from each other 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 which is an example of an embodiment of the present invention. FIG. 2 is a vertical cross-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 periphery of the roller holder 85 in FIG. FIG. 4 is a vertical cross-sectional view showing the internal structure of the printer unit 11 when the outer guide member 18 is on the second position side of FIG. FIG. 5 is a vertical cross-sectional view showing the internal structure of the printer unit 11 when the outer guide member 18 is on the second position side of FIG. FIG. 6 is a vertical cross-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 unit 11.

Hereinafter, embodiments of the present invention will be described with reference to the drawings as appropriate. It goes without saying that the embodiments described below are merely examples of the present invention, and the embodiments of the present invention can be appropriately changed without changing the gist of the present invention. In the following description, 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 in FIG. 1), and the side in which the opening 13 is provided is the front side (front) in the front-rear direction. 8 is defined, and the left-right direction 9 is defined when the multifunction device 10 is viewed from the front side (front side).

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

A scanner unit 12 is provided on the upper portion of the housing 14. Although the scanner unit 12 is configured as a so-called flatbed scanner, detailed description of the internal configuration of the scanner unit 12 is omitted here.

A printer unit 11 (an example of the image recording device of the present invention) is provided in the lower part of the housing 14.
The printer unit 11 has a printing function for recording an image on recording paper by an inkjet method. Inside the housing 14, a base frame 83, a pair of side frames 55, guide rails 56, 57, a feed tray 20, a feed section 16, a transport path 65, a recording section 24, roller pairs 59, 44, and guides. Members 18, 19, 31, a roller holder 85, a contact member 41, and the like are arranged.

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

The base frame 83 is a resin frame that forms the skeleton of the lower part of the printer unit 11. The pair of side frames 55 (an example of the connecting frame of the present invention) are arranged at intervals of 9 in the left-right direction. The side frame 55 is a metal frame. The side frames 55 are arranged on the right side and the left side of the transport path 65. The side frame 55 is supported by the base frame 83. The side frame 55 is fixed to the base frame 83 by 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 in the side frame 55 is inserted into the opening 68 formed in the guide rails 56 and 57. As a result, the side frame 55 is connected to the guide rails 56 and 57. 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, fixing with screws. The guide rails 56 and 57 will be described in more detail later.

[Shipping tray 20]
As shown in FIG. 1, an opening 13 is formed in front of the printer unit 11. The feed tray 20 can be inserted and removed from the printer unit 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 in a state of being inserted into the printer unit 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 is supported with recording papers stacked on top of each other.

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. The recording paper on which the image is recorded by the recording unit 24 is discharged to the upper surface of the discharge tray 21.

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

The feed roller 25 rotates by transmitting the driving force of the motor 78 (see FIG. 7) by the drive transmission mechanism 27 in which a plurality of gears are meshed with each other. As a result, of the recording paper supported by the bottom plate 22, the uppermost recording paper in contact with the feeding roller 25 is fed along the transport path 65.

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

[Transport path 65]
As shown in FIG. 2, the transport path 65 extends from the rear end of the feed tray 20. The transport path 65 has a curved portion 33 and an extending portion 34. The curved portion 33 extends upward and forward from the rear end portion of the feed 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 an outer guide member 18 (an example of the guide member of the present invention) facing each other at a predetermined interval, a roller holder 85, an inclined plate 23, and an inner guide member 19. The extending portion 34 is defined by a roller holder 85, a recording portion 24, an upper guide member 31, an inner guide member 19, and a platen 42. In other words, the roller holder 85 defines at least a portion of the curved portion 33 and the extending portion 34.
The roller holder 85 may define at least a part of only one of the curved portion 33 and the extending portion 34.

The recording paper supported by the feeding tray 20 is fed to the inclined plate 23 of the feeding tray 20 by the feeding roller 25. The inclined plate 23 changes the traveling direction of the recording paper, and the recording paper enters the curved portion 33. The recording paper that has entered the curved portion is conveyed so as to make a U-turn from the lower side to the upper side of the curved portion 33 and reaches the conveying roller pair 59. The recording paper sandwiched between the transfer rollers 59 is conveyed in the front-rear direction 8 with the extending portion 34 directed toward the recording portion 24. An image is recorded on the recording paper that has reached directly under the recording unit 24 by the recording unit 24. The recording paper on which the image is recorded is conveyed to the extending portion 34 in the front-rear direction 8 and discharged to the discharge tray 21. From the above, the recording paper is conveyed along the conveying direction 15 indicated by the arrow of the alternate long and short dash line in FIG.

[Recording unit 24]
As shown in FIG. 2, the recording unit 24 is provided above the extending portion 34. A platen 42 is provided below the recording unit 24 and at a position facing the recording unit 24. The platen 42 includes ribs 43 that are erected upward from the upper surface thereof and extend in the front-rear direction 8. A plurality of ribs 43 are arranged at intervals of 9 in the left-right direction. The rib 43 supports the recording paper that is conveyed through the extending portion 34 of the conveying path 65.

The recording unit 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 reciprocally movable 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 portion 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 the 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. When the carriage 40 is moving in the left-right direction 9, the recording head 38 ejects ink droplets from the nozzle toward the platen 42. As a result, the image is recorded on the recording paper supported by the platen 42 in the process of being conveyed along the extending portion 34.

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

The contact member 41 extends between the nozzle and the transport roller pair 59 in the transport orientation 15. The tip 46 of the abutting member 41 is located below the upper end of the rib 43. The tip portion 46 comes into contact with the upper surface of the recording paper to which the extending portion 34 is conveyed. The recording paper is in contact with the tip portion 46 from above and with the rib 43 from below, so that the recording paper has a corrugated shape continuous in the left-right direction 9.

[Convey roller pair 59 and discharge roller pair 44]
As shown in FIGS. 2 and 3, a transport roller pair 59 is arranged on the upstream side of the extension portion 34 in the transport direction 15 with respect to the recording unit 24. A discharge roller pair 44 is arranged on the downstream side of the extension portion 34 in the transport direction 15 with respect to the recording portion 24.

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

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

The discharge roller pair 44 includes a discharge roller 62 arranged below the extension portion 34 and a spur roller 63 arranged above the extension portion 34 so as to face the discharge roller 62. The discharge roller 62 and the spur roller 63 rotate with the left-right direction 9 as the 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 transfer roller 60 and the discharge roller 62 rotate by transmitting a driving force from the motor 78 (see FIG. 7). When the transfer roller 60 rotates while the recording paper is sandwiched between the transfer rollers 59, the recording paper is conveyed onto the platen 42 by the transfer rollers 59 in the transfer direction 15. Further, when the discharge roller 62 rotates while the recording paper is sandwiched between the discharge rollers and 44, the recording paper is conveyed toward the discharge tray 21 by the discharge rollers and 44 in the transport direction 15. The transport roller 60 and the discharge roller 62 may be driven and transmitted by a motor other than the motor 78.

[Guide rails 56, 57]
The guide rails 56 and 57 shown in FIG. 2 are substantially plate-shaped members extending 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 that is bent upward at the rear end portion. 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 so as to straddle the 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 by the pulleys. The belt is connected to the carriage 40 and a carriage driving motor (not shown) that applies a driving force to the carriage 40. When the carriage driving motor is driven, the driving force in the left-right direction 9 is transmitted to the carriage 40 via the belt mechanism. As a result, the carriage 40 reciprocates in the left-right direction 9.

[Guide member 30]
As shown in FIG. 2, the guide member 30 is arranged on the upstream side of the recording unit 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 arrow 91 about a shaft 90 provided on the upstream side of the transport direction 15 and extending in the left-right direction 9. There is. As a result, the guide member 30 rotates with the upstream side of the transport direction 15 as the axis and the downstream side of the transport direction 15 as the rotation tip side.

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

The outside of the curved portion 33 is defined by an outer guide member 18, a roller holder 85, and an inclined plate 23. The outside of the curved portion 33 may be defined only by the outer guide member 18 and the roller holder 85. From the above, the guide member 30 defines at least a part 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 the shaft 90 in the direction of the arrow 91. The shaft 90 projects 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 outer guide member 18 is rotatably supported by the housing 14 by supporting the shaft 90 by a bearing (not shown) of the housing 14. In FIG. 7, the illustration of the rotation tip side of the outer guide member 18 is omitted.

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

The outer guide member 18 rotates between the first position shown in FIG. 2 and the 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 it is in the second position. The user of the multifunction device 10 can take out 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 portion of the outer guide member 18. The convex portion 70 is formed on the left end portion and the right end portion of the outer guide member 18. When the outer guide member 18 is in the first position, the convex portion 70 projects forward. At this time, the convex portion 70 is in contact with the rear bent portion 53 of the guide rail 56. As a result, 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. 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 the front side thereof.

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 to the outer guide member 18. The roller holder 85 can rotate with respect to the housing 14 in the direction of the arrow 91 integrally with the outer guide member 18. Further, as shown in FIG. 6, the roller holder 85 is rotatable with respect to the outer guide member 18 in the direction of the arrow 95 about the shaft 94. However, when the front end of the roller holder 85 is positioned 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. NS.

The roller holder 85 rotates between the third position shown in FIG. 2 and the fourth position shown by the solid line in FIG.

As shown in FIGS. 2 and 3, the roller holder 85 is in the third position when the outer guide member 18 is in the first 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 extension portion 34. When the roller holder 85 is in the third position, each pinch roller 61 faces the transport roller 60 and is in contact with the transport roller 60 from above.

In a state where the pinch roller 61 and the transfer 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 the axis 80 of the transfer roller 60. It is located in front of (a line extending in the left-right direction 9 passing through the center of the transport roller 60, see FIG. 3). As a result, the recording paper sandwiched by the transfer roller pairs 59 is conveyed diagonally forward and downward and 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 kept constant.

As shown in FIG. 6, when the outer guide member 18 is in the second position, the roller holder 85 has a position indicated by a broken line (hereinafter, also referred to as a fifth position) and a fourth position indicated by a solid line. It is rotatable between. The position relative to the outer guide member 18 when the roller holder 85 is in the fifth position is the position relative to the outer guide member 18 when the roller holder 85 is in the third position (the position shown by the alternate long and short dash line in FIG. 6). ) Slightly ahead. The roller holder 85 is restricted from rotating forward from the fifth position by a stopper (not shown) provided on the outer guide member 18. The roller holder 85 is located behind the outer guide member 18 at the second position by rotating in the direction of arrow 97 from the third or fifth position. The roller holder 85 at this time is the fourth position. As shown in FIG. 6, the roller holder 85 at the fourth position has an arc with respect to a rotation locus 88 (an arc centered on the shaft 90) when the outer guide member 18 rotates in the direction of arrow 97. It extends outward in the radial direction of.

[Coil spring 73 and engaging member 74]
As shown in FIGS. 2 and 3, the roller holder 85 is provided with a coil spring 73 and an engaging member 74. A plurality of coil springs 73 and engaging members 74 are provided at intervals of 9 in the left-right direction. Each coil spring 73 is supported by a roller holder 85, and each engaging member 74 is supported by a coil spring 73. As a result, the coil spring 73 is interposed between the roller holder 85 and the engaging 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 engaging 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 protrusion 75 is formed on the upper surface of the engaging member 74. On the other hand, an opening 76 is formed at a position corresponding to each engaging member 74 on the guide rail 56. The opening 76 does not have to be configured to penetrate in the vertical direction 7. For example, the opening 76 may be a recess 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 engaging member 74 is set at the engaging position shown in FIG. 2 and the retracted position shown in FIG. 4 located below the engaging position as the coil spring 73 expands and contracts. 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 moves to the engaging 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 state of being contracted shorter than its natural length. As a result, the coil spring 73 urges each pinch roller 61 toward the transport roller 60. As a result, each pinch roller 61 is pressed against the transport 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 the arrow 97, the protrusion 75 comes out of the opening 76. As a result, the engaging member 74 moves to the retracted position.

In the present embodiment, the urging member that urges the protrusion 75 upward and the urging member that urges the pinch roller 61 toward the transport roller 60 are both 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 transport roller 60 may be different members.

[Rotating operation of guide member 30]
Hereinafter, the rotational operation of the guide member 30 will be described. 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 engaging member 74 is inserted into the opening 76 of the guide rail 56 and is in the engaging position. As a result, the roller holder 85 is positioned at the third position. 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 46 of the contact member 41 is below the holding position of the recording paper by the transport roller pair 59. When the roller holder 85 is in the third position, each pinch roller 61 is in contact with the transport roller 60 by the urging force of the coil spring 73.

When the outer guide member 18 is rotated from the first position to the second position in the direction of the arrow 91, the roller holder 85 is rotated rearward together with the outer guide member 18. Then, the protrusion 75 of the engaging 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 reaction force causes the coil spring 73 to contract. As a result, the engaging member 74 moves downward. As a result, as shown in FIG. 4, the protrusion 75 comes out of the opening 76, and the engagement member 74 and the guide rail 56 are disengaged.

When the outer guide member 18 is further rotated toward the second position, the protrusion 75 abuts on the lower surface 98 of the guide rail 56 (an example of the second contact surface of the present invention) by the urging force of the coil spring 73. In this state, it moves backward along the lower surface 98. At this time, the engaging member 74 is in the retracted position below the engaging position. When the protrusion 75 moves rearward from the lower surface 98, the contracted coil spring 73 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 backward 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 transport 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 extending portion 34 side and supported by the surface of the inner guide member 19 on the curved portion 33 side. Here, the surface of the inner guide member 19 on the curved portion 33 side is curved toward the rear diagonally downward. Therefore, the roller holder 85 rotates downward due to its own weight so that it is guided backward. The rotation is regulated by the stopper described above. As a result, when the roller holder 85 moves rearward 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 at the fifth position shown by the broken line in FIG. 6, the pinch roller 61 is in a state of being separated from the transport roller 60, and the contact member 41 is in a state of being separated from the transport path 65. In this state, the roller holder 85 is rotatable in the direction of arrow 97 toward the fourth position shown by the solid line in FIG.

When the outer guide member 18 is in the second position and the roller holder 85 is in the fourth position (see FIG. 6) and the outer guide member 18 is rotated to the first position, the roller holder 85 is first placed in the first position. It is rotated in the direction opposite to the arrow 97 from the 4th position to the 5th position.

Next, when the outer guide member 18 is rotated in the direction of the arrow 91 toward the first position, the protrusion 75 abuts on the rear bent portion 53 of the guide rail 56 and presses it. As a result, the protrusion 75 receives a reaction force from the rear bending portion 53. The reaction force causes the coil spring 73 to contract.
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 the inside of 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. After that, the roller holder 85 is guided along the surface of the inner guide member 19 on the transport 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, as shown in FIG. 2, 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 engaging member 74 becomes the engaging position, and the roller holder 85 becomes 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 be in contact with the recording paper 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 transfer roller 60 in the transfer direction 15.

[Effect of Embodiment]
According to the present embodiment, when the outer guide member 18 is in the second position, the transport path 65 is opened and the pinch roller 61 is separated from the transport 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 transport roller 60. From the above, according to the present embodiment, the transfer roller 60 and the pinch roller 61 are separated from each other in conjunction with the opening of the outer guide member 18, and when the outer guide member 18 is closed, the pinch roller 61 moves to the transfer roller 60. Is accurately positioned with respect to.

Further, according to the present embodiment, since the guide rail 56 supports the recording unit 24, the pinching position of the recording paper between the transport roller 60 and the pinch roller 61 can be accurately positioned with respect to the recording unit 24.

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

Further, according to the present embodiment, since the outer guide member 18 can rotate to the second position, access to the transport path 65 opened by the outer guide member 18 when the roller holder 85 is in the fourth position. The route becomes wider.

Further, according to the present embodiment, since the outer guide member 18 comes into contact with the guide rail 56 at the first position, 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 in front of the axis 80 of the transport roller 60 when the outer guide member 18 is in the first position, so that the outer guide member 18 is first. It is possible to generate an urging force that positions the roller holder 85 at the position and positions the roller holder 85 at the third position.

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

In the above-described embodiment, the roller holder 85 is connected to the outer guide member 18, but the roller holder 85 may not 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 device 11 ... Printer unit 14 ... Housing 18 ... Outer guide member (guide member)
24 ... Recording unit 56 ... Guide rail 60 ... Conveying roller (first roller)
61 ... Pinch roller (second roller)
65 ... Transport path 73 ... Coil spring (urging member)
74 ... Engagement member 85 ... Roller holder

Claims (8)

An image recording device having a recording unit that records an image on a sheet transported to a transport path.
A housing having a frame,
A first roller arranged below the sheet transported to the transport path, and
A roller holder that supports the second roller and the first contact member arranged above the sheet transported to the transport path and has an engaging portion that can engage with the frame.
The roller holder is connected so as to rotate about a first axis parallel to the axis of the first roller, and is centered on a second axis parallel to the axis of the first roller with respect to the frame. A rotating member that can rotate between the first position and the second position,
The first position is a position where the rotating member positions the roller holder at a third position where the first roller and the second roller are in contact with each other, and the second position is where the rotating member is the roller. It is a position where the holder is positioned so that the first roller and the second roller are separated from each other .
When the rotating member is in the first position, the roller holder is the engagement portion is positioned in said third position by engagement with the frame, the first contact member above SL in the conveyance path An image recording device that comes into contact with the upper surface of the sheet to be conveyed. It said rotating member Ri said second position near, and when the roller holder is in the position where the first roller and the second roller is separated, the sheet of the first contact member is conveyed through the conveying path The image recording apparatus according to claim 1, which does not come into contact with the image recording apparatus. It is further provided with a first rib which is arranged below the sheet to be conveyed to the transfer path and abuts on the lower surface of the sheet.
The image according to claim 1 or 2, wherein when the roller holder is located at the third position, the lower end portion of the first contact member is located below the upper end portion of the first rib. Forming device. A second rib, which is arranged below the sheet to be conveyed to the transfer path and abuts on the lower surface of the sheet, is further provided.
The first rib and the second rib are arranged side by side in the axial direction of the first roller.
The first abutment member is disposed between the first rib and the second rib, the image forming apparatus according to claim 3. Is supported by the roller holder further comprises a second abutment member that abuts the upper surface of the sheet conveyed in the conveying path,
The first rib, the first contact member, the second rib, and the second contact member are arranged side by side in the axial direction of the first roller, and wave the sheet conveyed in the transfer path. The image forming apparatus according to claim 4, wherein the image forming apparatus is formed into a shape. The roller holder further comprises a plurality of urging members for urging the roller holder to the first roller side, the image forming apparatus according to any one of claims 1 to 5. The image forming apparatus according to claim 6, wherein the urging member is a coil spring. The image forming according to claim 7, wherein the amount of contraction of the coil spring when the rotating member is in the first position is larger than the amount of contraction of the coil spring when the rotating member is in the second position. Device.

Images