Medium conveyance device, recording device

Abstract

To suppress a gap between a first cover and a second cover while employing a comb-tooth structure.SOLUTION: When viewed from a medium width direction that is a direction intersecting a conveyance direction, a second direction end part of a first path forming member and a first direction end part of a second path forming member overlap with each other in a state in which the first cover and the second cover are closed, the second direction end part of the first path forming member is located in a second direction further than the first direction end part of the second cover in the state in which the first cover and the second cover are closed, the first direction end part of the second path forming member is located in the second direction further than the second direction end part of the first cover in the state in which the first cover and the second cover are closed, and when the first cover is opened from the closed state, the second direction end part of the first path forming member moves toward the inside of the device.SELECTED DRAWING: Figure 12

Description

[Technical field]

[0001] The present invention relates to a medium transport device that transports a medium, and a recording apparatus including the same. [Background technology]

[0002] Patent Document 1 discloses an image forming apparatus that has a rotatable cover on the rear surface of the apparatus, and by opening the cover, a sheet transport path is exposed, enabling jam processing to be performed. Patent Document 2 discloses an image forming apparatus that includes a fixed transport guide and a movable transport guide, and that can open a sheet transport path by opening the movable transport guide. In this image forming apparatus, the connection portion between the fixed transport guide and the movable transport guide has a comb-tooth structure. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2021-070556 A [Patent Document 2] JP 2011-032040 A Summary of the Invention [Problem to be solved by the invention]

[0004] If the cover is made larger to open a wider range of the sheet transport path, this leads to reduced operability and requires a large space to open the cover, so it is preferable to separate the cover in order to open a wider range of the sheet transport path. Hereinafter, one adjacent cover will be referred to as the first cover, and the other cover will be referred to as the second cover. In addition, it is necessary to provide a path member on the inside of the cover, such as the fixed transport guide and the movable transport guide shown in Patent Document 2. Hereinafter, the path member provided on the first cover is referred to as a first path forming member, and the path member provided on the second cover is referred to as a second path forming member.

[0005] In order for the sheet to move from one of the first path forming member and the second path forming member to the other without getting caught, it is necessary to employ a comb-tooth structure as shown in Patent Document 2. The comb tooth structure is configured such that the first path forming member protrudes toward the second cover and the second path forming member protrudes toward the first cover, so when attempting to open the first cover, the tip of the first path forming member gets caught on the second cover, and when attempting to open the second cover, the tip of the second path forming member gets caught on the first cover. To avoid such problems, it is necessary to widen the gap between the first cover and the second cover, but such a configuration makes it easier for dust and other particles to enter the inside of the device through the gap between the first cover and the second cover. [Means for solving the problem]

[0006] In order to solve the above problem, the medium transport device of the present invention includes a housing, a transport path provided inside the housing and transporting a medium along a transport direction including a first direction and a second direction opposite to the first direction, a first cover rotatable between an open state in which a portion of the transport path is exposed and a closed state in which the portion is not exposed, a second cover rotatable between an open state in which a portion of the transport path is exposed and a closed state in which the portion is not exposed, the second cover being arranged in the second direction relative to the first cover so as to be aligned with the first cover, a first path forming member provided inside the first cover and forming a portion of the transport path, and a second path forming member provided inside the second cover and positioned in the second direction relative to the first path forming member and forming a portion of the transport path. and a path forming member, wherein when viewed from a medium width direction that is a direction intersecting the transport direction, when the first cover and the second cover are closed, the second direction end of the first path forming member and the first direction end of the second path forming member overlap, when the first cover and the second cover are closed, the second direction end of the first path forming member is located in the second direction further than the first direction end of the second cover, when the first cover and the second cover are closed, the first direction end of the second path forming member is located in the second direction further than the second direction end of the first cover, and when the first cover is opened from a closed state, the second direction end of the first path forming member moves toward the inside of the device.

[0007] A recording apparatus according to the present invention is characterized by comprising a recording section for recording on a medium, and the medium transport device described above. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a diagram showing a media transport path of the printer. [Diagram 2] FIG. 2 is an external perspective view of the printer with the first cover and the second cover closed. [Diagram 3] FIG. 2 is an external perspective view of the printer with the first cover open and the second cover closed. [Figure 4]FIG. 2 is an external perspective view of the printer with the first cover closed and the second cover open. [Diagram 5] FIG. 2 is an external perspective view of the printer with the first cover, the second cover, and the inner door open. [Figure 6] 4 is a perspective view of the first path forming member and the second path forming member with the first cover and the second cover closed. FIG. [Figure 7] FIG. 4 is an enlarged perspective view of a connection portion between the first path forming member and the second path forming member. [Figure 8] 13 is an enlarged view of a protruding portion of the first path forming member and a receiving portion of the third path forming member. FIG. [Figure 9] 4 is a cross-sectional view of a main portion of a first path forming member, a second path forming member, and a third path forming member. FIG. [Figure 10] 4 is a cross-sectional view of a main portion of a first path forming member, a second path forming member, and a third path forming member. FIG. [Figure 11] 5A to 5C are diagrams illustrating comparative examples of a first cover, a second cover, a first path forming member, and a second path forming member. [Figure 12] 4A and 4B are diagrams illustrating main parts of a first cover, a second cover, a first path forming member, and a second path forming member. [Figure 13] FIG. 11 is a perspective view of a second cover according to a modified example. [Figure 14] FIG. [Figure 15A] A simplified diagram showing the second cover and middle door as seen from the +Z direction. [Figure 15B] A simplified diagram showing the second cover and middle door as seen from the +Z direction. [Figure 15C] A simplified diagram showing the second cover and middle door as seen from the +Z direction. [Figure 15D] A simplified diagram showing the second cover and middle door as seen from the +Z direction. [Figure 15E] A simplified diagram showing the second cover and middle door as seen from the +Z direction. [Figure 16] FIG. 4 is a cross-sectional view of a main portion of the middle door and the second cover. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The present invention will now be briefly described. A medium transport device according to a first aspect includes a housing, a transport path provided inside the housing and transporting a medium along a transport direction including a first direction and a second direction opposite to the first direction, a first cover rotatable between an open state in which a portion of the transport path is exposed and a closed state in which the portion is not exposed, a second cover rotatable between an open state in which a portion of the transport path is exposed and a closed state in which the portion is not exposed and disposed in the second direction relative to the first cover so as to be aligned with the first cover, a first path forming member provided inside the first cover and forming a portion of the transport path, and a second path forming member provided inside the second cover and positioned in the second direction relative to the first path forming member and forming a portion of the transport path. and when viewed from a medium width direction that is a direction intersecting the transport direction, when the first cover and the second cover are closed, the second direction end of the first path forming member and the first direction end of the second path forming member overlap, when the first cover and the second cover are closed, the second direction end of the first path forming member is located in the second direction further than the first direction end of the second cover, when the first cover and the second cover are closed, the first direction end of the second path forming member is located in the second direction further than the second direction end of the first cover, and when the first cover is opened from a closed state, the second direction end of the first path forming member moves toward the inside of the device.

[0010] According to the present aspect, when viewed from the medium width direction, a portion of the first path forming member and a portion of the second path forming member overlap when the first cover and the second cover are closed, thereby preventing the medium being transported along the transport path from getting caught on the first path forming member or the second path forming member. When the first cover and the second cover are closed, the second direction end of the first path forming member is positioned in the second direction further than the first direction end of the second cover, and when the first cover is opened from a closed state, the second direction end of the first path forming member moves toward the inside of the device. Therefore, when the first cover is opened, the second direction end of the first path forming member does not interfere with the second cover, and the first cover can be opened and closed independently. Furthermore, when the first cover and the second cover are closed, the first direction end of the second path forming member is positioned further in the second direction than the second direction end of the first cover, so that when the second cover is opened, the first direction end of the second path forming member does not interfere with the first cover, and the second cover can be opened and closed independently. As described above, interference between components can be avoided when opening and closing the first cover and the second cover, so there is no need to ensure a large gap between the first cover and the second cover, and dust can be prevented from entering the inside of the device.

[0011] The second aspect is an aspect dependent on the first aspect, and is characterized in that a protrusion protruding in the second direction is provided at the second direction end of the first path forming member, a recess for receiving the protrusion and having a bottom surface along the transport path is formed at the first direction end of the second path forming member, and when the first cover and the second cover are closed, the protrusion fits into the recess, so that a portion of the first path forming member and a portion of the second path forming member overlap when viewed from the medium width direction.

[0012] According to this aspect, when the first cover and the second cover are closed, the protrusion fits into the recess to form a comb-like structure, so that the medium is less likely to get caught when moving from one of the first path forming member and the second path forming member to the other. Furthermore, the recess has a bottom surface that is aligned with the transport path, so that dust and the like can be prevented from entering the inside of the device through a connection portion between the first path forming member and the second path forming member.

[0013] A third aspect is an aspect dependent on the first aspect, characterized in that the first direction is a vertically upward direction and the second direction is a vertically downward direction, the vertical dimension of the second cover is greater than the vertical dimension of the first cover, the axis of rotation of the first cover is along the medium width direction, the first cover opens and closes by rotating with the end in the first direction as a free end, and the axis of rotation of the second cover is along the vertical direction.

[0014] In a configuration in which the vertical dimension of the second cover is larger than the vertical dimension of the first cover, when the second cover rotates with its upper end as the free end or its lower end as the free end, a larger space is required for opening and closing. According to this aspect, since the axis of rotation of the second cover is aligned along the vertical direction, it is possible to reduce the space required for opening and closing the second cover. Incidentally, this aspect is not limited to the above-mentioned first aspect, and may be subordinate to the above-mentioned second aspect.

[0015] A fourth aspect is a dependent aspect of the third aspect, characterized in that the first cover and the second cover are provided on the right side or the left side of the housing, and the second cover is opened and closed by rotating with the front end in the depth direction of the device as the free end.

[0016] According to this aspect, the first cover and the second cover are provided on the right side or the left side of the housing, and the second cover opens and closes by rotating with the front end in the device depth direction as the free end, so that when the second cover is opened from a closed state, it opens toward the rear of the device. This makes it difficult for the second cover to get in the way when opening the second cover to clear a jam. In this specification, the jam clearing operation means the operation of removing the jammed medium.

[0017] A fifth aspect is a aspect dependent on the third aspect, characterized in that the conveying path is curved at a portion formed by the end of the first path forming member in the first direction. According to this aspect, the transport path has a curved portion formed by the end of the first path forming member in the first direction, making it easy for media to jam at this portion; however, since the first cover opens and closes by rotating with the end in the first direction as the free end, when the first cover is opened, the curved portion opens wide, making it easy to clear the jam. Incidentally, this aspect is not limited to the above-mentioned third aspect, and may be subordinate to the above-mentioned fourth aspect.

[0018] A sixth aspect is an aspect dependent on the first aspect, and is characterized in that it comprises a third path forming member which is arranged opposite the first path forming member and forms part of the conveying path, and the third path forming member is provided with a receiving portion which receives the second direction end of the first path forming member when the first cover is opened.

[0019] According to this aspect, the third path forming member disposed opposite the first path forming member is provided with a receiving portion that receives the second direction end of the first path forming member when the first cover is opened, so that it is possible to prevent the second direction end of the first path forming member from colliding with the third path forming member when the first cover is opened. This also makes it possible to prevent the second direction end of the first path forming member from digging into the medium when the first cover is opened in a case where a jammed medium exists between the first path forming member and the third path forming member. Incidentally, this aspect is not limited to the above-mentioned first aspect, and may be subordinate to any of the above-mentioned second to fifth aspects.

[0020] A seventh aspect is an aspect dependent on the first aspect, and is characterized in that the conveying path is a first conveying path, and the device comprises a second conveying path located further inside the device than the first conveying path, and an inner door facing the second path forming member, which forms part of the first conveying path and also forms part of the second conveying path, and the inner door is rotatable between an open state that exposes part of the second conveying path and a closed state that does not expose it.

[0021] According to this aspect, in a configuration in which the second transport path is provided further inside the device than the first transport path, a portion of the second transport path can be exposed by opening the middle door, and jam clearance work can be performed when a media jam occurs in the second transport path. Incidentally, this aspect is not limited to the above-mentioned first aspect, and may be subordinate to any of the above-mentioned second to sixth aspects.

[0022] The eighth aspect is a aspect dependent on the seventh aspect, and is characterized in that the middle door is positioned in a position where it does not interfere with the first cover and the first path forming member when opening and closing. According to this aspect, the middle door is positioned in a position that does not interfere with the first cover and the first path forming member when opening and closing, so that the middle door can be opened and closed without opening the first cover, improving usability of the device.

[0023] A ninth aspect is an aspect dependent on the seventh aspect, and further includes a transport unit provided in the second cover for transporting a medium on the first transport path, a drive unit provided in the housing for driving the transport unit, and a transmission unit provided in the second cover for transmitting power from the drive unit to the transport unit, characterized in that the second cover has an abutment portion that abuts against the middle door when the second cover is opened or closed, thereby forming a distance between the transmission unit and the middle door.

[0024] If the transmission unit collides with the middle door when the second cover is opened or closed, the transmission unit may be damaged, and power may not be properly transmitted from the drive unit to the transport unit. According to this aspect, the second cover has an abutment portion that abuts against the middle door when the second cover is opened or closed to form a distance between the transmission unit and the middle door, and therefore it is possible to prevent the transmission unit from colliding with the middle door when the second cover is opened or closed. As a result, it is possible to prevent power from being transmitted from the drive unit to the transport unit.

[0025] The tenth aspect is a dependent aspect of the ninth aspect, and is characterized in that the middle door has an abutment portion that abuts against the abutment portion when the second cover is opened or closed, and the abutment portion is provided in a position opposite to the surface of the medium transported along the first transport path.

[0026] According to the present aspect, since the abutment portion is provided at a position facing the surface of the medium transported along the first transport path, the size of the device in the direction along the surface of the medium can be reduced compared to when the abutment portion is provided at a position not facing the surface of the medium transported along the transport path.

[0027] The eleventh aspect is a dependent aspect of the tenth aspect, and is characterized in that the middle door has a rib along the transport direction at a position opposite to the surface of the medium transported along the first transport path, and the abutment portion is provided at a position outside the formation area of ​​the rib.

[0028] According to this aspect, the inner door has a rib formed along the transport direction at a position facing the surface of the medium transported along the first transport path, so that the medium can be transported smoothly. Furthermore, if the contact portion comes into contact with the rib, the rib may be damaged, and the medium may not be able to pass through the rib smoothly. However, since the contact portion is provided at a position outside the formation area of ​​the rib, damage to the rib can be suppressed, and the medium can be transported smoothly. Furthermore, the contact portion comes into contact with the rib, thereby making it possible to prevent the relative displacement between the second cover and the inner door from being hindered.

[0029] A twelfth aspect is a dependent aspect of the tenth aspect, and is characterized in that the middle door is provided with a driven roller that suppresses contact of the medium transported in the first direction with the abutment portion in the second direction relative to the abutment portion on the first transport path.

[0030] The contact between the contact portion and the contacted portion may cause scratches on both. The contacted portion is provided at a position facing the surface of the medium transported on the first transport path, so if scratches are formed on the contacted portion, there is a risk that the medium will not be able to smoothly pass the position of the contacted portion when passing through the contacted portion. However, according to this aspect, the inner door is provided with a driven roller in the second direction relative to the contacted portion on the first transport path, which suppresses contact of the medium transported in the first direction with the contacted portion, so that the medium transported in the first direction can smoothly pass the position of the contacted portion. Incidentally, this aspect is not limited to the above-mentioned tenth aspect, and may be subordinate to the above-mentioned eleventh aspect.

[0031] A thirteenth aspect is a dependent aspect of the tenth aspect, and is characterized in that it comprises a third path forming member which is arranged opposite the first path forming member and forms part of the first transport path, the abutment portion is located at an end of the middle door in the first direction, the end of the third path forming member in the second direction is formed as an R-surface, and the abutment portion is located at a position which advances further toward the first transport path than the R-surface.

[0032] According to the present aspect, the end portion of the third path forming member in the second direction is formed as an R-surface, thereby preventing the leading edge of the medium transported in the first direction from getting caught on the end portion of the third path forming member in the second direction. Furthermore, since the abutment portion is located at a position that is further toward the first transport path than the R surface, it is possible to prevent the leading edge of the medium transported in the first direction from getting caught on the end of the third path forming member in the second direction when it passes through the abutment portion and reaches the third path forming member. Incidentally, this aspect is not limited to the above-mentioned tenth aspect, and may be subordinate to the above-mentioned eleventh or twelfth aspect.

[0033] A medium conveying device according to a fourteenth aspect of the present invention is A housing and a first transport path provided inside the housing and configured to transport a medium along a transport direction including a first direction and a second direction opposite to the first direction; a second cover that is rotatable between an open state in which a portion of the first transport path is exposed and a closed state in which the portion is not exposed; a second path forming member that is a member provided inside the second cover and forms a part of the first transport path; a second transport path located further inward than the first transport path; an inner door facing the second path forming member, the inner door forming a part of the first transport path and a part of the second transport path; Equipped with the inner door is rotatable between an open state in which a portion of the second transport path is exposed and a closed state in which a portion of the second transport path is not exposed, a transport section provided in the second cover and configured to transport the medium in the second transport path; A drive unit provided in the housing and configured to drive the transport unit; a transmission unit provided in the second cover and configured to transmit power from the drive unit to the transport unit; Further equipped with The second cover is characterized by having an abutment portion that abuts against the inner door when the second cover is opened or closed, thereby forming a distance between the transmission portion and the inner door. According to this aspect, it is possible to obtain the same effect as the above-mentioned ninth aspect. Note that any of the above-mentioned tenth to thirteenth aspects may be subordinate to this aspect.

[0034] A recording device according to a fifteenth aspect includes a recording section that records on a medium, and the medium conveying device according to any one of the first to fourteenth aspects. According to this aspect, the recording device can obtain the effects of any one of the first to fourteenth aspects described above.

[0035] The present invention will be specifically described below. In the following, an inkjet printer 1 that performs recording by ejecting ink, which is an example of a liquid, onto a medium such as recording paper will be described as an example of a recording device. In the following, the inkjet printer 1 will be abbreviated to printer 1. From the viewpoint of transporting the medium, the configuration of the printer 1 excluding the line head 44 described below can be considered as the medium transport device 100. The printer 1 is equipped with the medium transport device 100 and the line head 44.

[0036] The XYZ coordinate system shown in each figure is an orthogonal coordinate system, with the Y-axis direction being the direction intersecting the medium transport direction, i.e., the medium width direction, and also the device depth direction. The +Y direction of the Y-axis direction is the direction from the front of the device to the rear of the device, and the -Y direction is the direction from the rear of the device to the front of the device. In this embodiment, a tilt panel 8 (see Figures 2 to 5) constituting an operation unit for performing various operation settings is provided on the front of the device, and the side of the device on which the tilt panel 8 is provided is the front of the device.

[0037] The X-axis direction is the width direction of the device, and as seen by an operator facing the tilt panel 8, the +X direction is the left direction and the -X direction is the right direction. The Z-axis direction is the vertical direction and is the normal direction to the mounting surface G of the printer 1, that is, the device height direction. Within the Z-axis direction, the +Z direction is the upward direction and the -Z direction is the downward direction. The +Z direction is an example of the first direction, and the -Z direction is an example of the second direction. In the following, the direction in which the medium is transported may be referred to as "downstream," and the opposite direction may be referred to as "upstream." In addition, the medium transport path is shown by a dashed line in Figure 1. In the printer 1, the medium is transported through the medium transport path shown by the dashed line in Figure 1.

[0038] The F-axis direction is the medium transport direction between a line head 44 and the transport belt 13 (described later), i.e., in the recording area, with the +F direction being the downstream transport direction and the opposite -F direction being the upstream transport direction. The V-axis direction is perpendicular to the F-axis direction.

[0039] The printer 1 is configured so that an add-on unit (not shown) can be connected to the bottom of the housing 2, and is configured so that media can be fed from this add-on unit. In Fig. 1, reference numeral 28 denotes a pair of transport rollers that feed the media fed from the add-on unit (not shown) into the housing 2. The printer 1 may be configured as a multifunction machine equipped with a scanner unit (not shown) that is an example of an image reading device on the upper part of the housing 2.

[0040] The housing 2 has a first media cassette 3 that stores media in its lower portion. A pick roller 21 that sends out the stored media in the -X direction is provided for the first media cassette 3. The medium sent out by the pick roller 21 is sent toward the transport roller pair 31 by the feed roller pair 25. In the following, unless otherwise specified, a "roller pair" is defined as consisting of a drive roller that is driven by a drive source (not shown) to apply a feeding force to the medium, and a driven roller that rotates in contact with the drive roller or the medium. The supply roller 19 and the separation roller 20 provided near the transport roller pair 38 are a roller pair that feeds the medium from a supply tray not shown in FIG.

[0041] The medium receiving the feeding force from the transport roller pair 31 is sent between the line head 44, which is an example of a recording unit, and the transport belt 13, that is, to a position facing the line head 44. Note that hereinafter, the medium transport path from the transport roller pair 31 to the transport roller pair 32 is referred to as the transport path T1 during recording. The line head 44 constitutes the head unit 43. The line head 44 performs recording by ejecting ink onto the surface of the medium. The line head 44 is an ink ejection head configured so that the nozzles that eject ink cover the entire area in the width direction of the medium, and is configured as an ink ejection head that can perform recording over the entire width of the medium without moving in the width direction of the medium. However, the ink ejection head is not limited to this, and may be a type that is mounted on a carriage and ejects ink while moving in the width direction of the medium.

[0042] The head unit 43 is provided so as to be capable of moving forward and backward relative to the transport path T1 during recording, and is provided so as to be movable between a recording position where it advances onto the transport path T1 during recording to record on the medium, and a retreat position where it retreats from the transport path T1 during recording. FIG. 1 shows a state in which the head unit 43 is in the recording position, and in this state recording is performed on the medium.

[0043] Reference numerals 10A, 10B, 10C, and 10D denote ink storage units serving as liquid storage units. Ink ejected from the line head 44 is supplied from each ink storage unit to the line head 44 via a tube (not shown). The ink storage units 10A, 10B, 10C, and 10D are detachably provided in the mounting units 11A, 11B, 11C, and 11D, respectively. Reference numeral 12 denotes a waste liquid storage section that stores ink as waste liquid discharged from the line head 44 toward a flushing cap (not shown) for maintenance purposes.

[0044] The conveyor belt 13 is an endless belt that is wound around pulleys 14 and 15, and rotates when at least one of the pulleys 14 and 15 is driven by a motor (not shown). The medium is conveyed to a position facing the line head 44 while being attracted to the belt surface of the conveyor belt 13. The medium can be attracted to the conveyor belt 13 by a known attraction method such as an air suction method or an electrostatic attraction method.

[0045] Here, the transport path T1 during recording, which passes through a position facing the line head 44, intersects both the horizontal and vertical directions and transports the medium upward. That is, the F-axis direction intersects both the horizontal and vertical directions. Therefore, the ejection surface 44a of the line head 44 that ejects ink is also parallel to the F-axis direction and intersects both the horizontal and vertical directions. In this embodiment, the angle α that the F-axis direction makes with the horizontal direction is 75°. The angle α may be changed to another angle within the range of 0°<α≦90°. For example, the angle α may be set to the range of 45°≦α≦80°. When making the printer 1 compact, 60°≦α≦80° is preferable.

[0046] The medium on whose first side recording has been performed by the line head 44 is then conveyed further upward by the conveyor roller pair 32 positioned downstream of the conveyor belt 13 . A flap 41 is provided downstream of the transport roller pair 32, and the transport direction of the medium is switched by this flap 41. When the medium is sent to a post-processing unit 90 described below, the medium is sent to an upper discharge path T5 by the flap 41. The medium sent to the discharge path T5 is sent to the post-processing unit 90 by the transport roller pair 35A and the downstream transport roller pair 35B.

[0047] When recording is performed on the second side of the medium in addition to the first side, the transport direction of the medium is directed to branch position K1 by flap 41. The medium then passes through branch position K1 and enters switchback path T2. In this embodiment, switchback path T2 is the medium transport path above branch position K1. Switchback path T2 is an example of a transport path that is provided inside housing 2 and transports the medium along a transport direction that includes the +Z direction and the -Z direction. Incidentally, the transport direction including the +Z direction and the opposite -Z direction does not need to be strictly parallel to the +Z direction and the -Z direction, but may include a +Z direction component or a -Z direction component. The switchback path T2 has a curved path portion T2a, and the medium is curved in the curved path portion T2a.

[0048] The switchback path T2 is provided with pairs of transport rollers 36 and 37. The pair of transport rollers 36 is composed of a drive roller 36a driven by a power source (not shown), such as a motor, and a driven roller 36b that can rotate following the movement. The pair of transport rollers 37 is composed of a drive roller 37a driven by a power source (not shown), such as a motor, and a driven roller 37b that can rotate following the movement. The drive roller 36a and the drive roller 37a are an example of a transport section that transports the medium on the switchback path T2. The medium that has entered the switchback path T2 is transported upward by the transport roller pair 36, 37, and when the bottom end of the medium passes the branch position K1, the rotation direction of the transport roller pair 36, 37 is switched, so that the medium is transported downward. Note that the inner door 53, which will be described later, is provided with a driven roller 39 that is in contact with the transported medium and can be rotated by the transport roller pair 36, 37.

[0049] A connection path T3 is connected to the switchback path T2. In this embodiment, the connection path T3 is a medium transport path that extends from the branch position K1 to the transport roller pair 34. A reversing path T4 is connected to the connection path T3. In this embodiment, the reversing path T4 is a medium transport path that extends from the transport roller pair 34 to the transport roller pair 31 through the transport roller pair 38. The reversing path T4 is a transport path upstream of a position facing the line head 44 and is located vertically below the line head 44. The reversing path T4 is a path portion that is convex vertically downward and curves the medium upward to reverse it. The medium conveyed downward from branch position K1 receives a feeding force from conveying roller pairs 33 and 34, reaches conveying roller pair 38, is turned over, and is sent to conveying roller pair 31.

[0050] The medium is again sent to a position facing the line head 44, with the second side opposite the first side on which recording has already been performed facing the line head 44. This makes it possible for the line head 44 to record on the second side of the medium.

[0051] The upper part of the switchback path T2 described above can be exposed by opening a first cover 51, which will be described later, allowing a jam clearance operation to be performed. In addition, the lower part of the switchback path T2 can be exposed by opening a second cover 52 described later, which allows for jam clearance work to be performed. In addition, a part of the discharge path T5 can be exposed by opening an inner door 53 described later, which allows the jam clearance operation to be performed.

[0052] Next, the medium transported along the discharge path T5 is discharged to the internal discharge section 7. The internal discharge section 7 is an internal space provided in the printer 1 for discharging the medium after recording, and is a space that is open in the -Y and +X directions. The internal discharge section 7 overlaps with the top surface of the housing 2 when viewed from the +Z direction. A post-processing unit 90 is provided in this internal discharge section 7. The post-processing unit 90 may be detachable from the internal discharge section 7. Furthermore, when the post-processing unit 90 is not attached, a configuration may be adopted in which a discharge tray (not shown) can be attached instead of the post-processing unit 90.

[0053] The post-processing unit 90 has a processing tray 91, and media discharged through the discharge path T5 are temporarily stacked on the processing tray 91. The media stacked on the processing tray 91 can be stapled by a post-processing section 92. The stapled media are discharged toward and stacked on a stacking tray 93 by a discharge means (not shown). In addition, binding processing using a stapler is an example of post-processing, and post-processing is not limited to binding processing, but may be other processes such as a punching process in which holes are punched in the medium, a saddle stitching process in which a stack of media is saddle stitched, and a shift discharge process in which the discharge position of the stack of media is shifted alternately in the media width direction and discharged.

[0054] Next, the first cover 51 and the second cover 52 will be described with reference to FIG. The printer 1 has a first cover 51 on the right side, and also has a second cover 52 below the first cover 51.

[0055] The first cover 51 is a cover that can rotate around a rotation shaft 51a (FIGS. 1 and 9). In FIG. 2, the symbol La1 indicates the axial center line of the rotation shaft 51a, i.e., the axis of rotation of the first cover 51. In this embodiment, the axis La1 is parallel to the Y-axis. The first cover 51 can rotate between an open state (FIGS. 3 and 5) in which a part of the switchback path T2 is exposed, and a closed state (FIGS. 2 and 4) in which the part is not exposed. The rotation shaft 51a of the first cover 51 is provided near the end of the first cover 51 in the -Z direction, so that the end of the first cover 51 in the +Z direction is the free end when rotating. A grip portion 51c is provided near the end portion in the +Z direction of the first cover 51, and the first cover 51 can be opened by inserting fingers into the grip portion 51c.

[0056] The second cover 52 is a cover that can rotate around two hinge portions 52a (FIG. 4), and is disposed in the -Z direction with respect to the first cover 51. In FIG. 2, the reference symbol La2 indicates the axis of rotation of the second cover 52. In this embodiment, the axis La2 is parallel to the Z axis. The second cover 52 is rotatable between an open state (FIG. 4) in which a portion of the switchback path T2 is exposed, and a closed state (FIGS. 2 and 3) in which the portion is not exposed. The hinge portion 52a of the second cover 52 is provided near the end of the second cover 52 in the +Y direction, so that the end of the second cover 52 in the -Y direction is the free end when rotating. A grip portion 52c is provided near the end portion in the -Y direction of the second cover 52, and the second cover 52 can be opened by inserting fingers into the grip portion 52c.

[0057] The second cover 52 is provided with a transmission unit 73 as shown in FIG. 4. The transmission unit 73 is composed of a plurality of gears. The transmission unit 73 includes a driven gear 74. The housing 2 is provided with a drive gear 70, which is an example of a drive unit. The drive gear 70 is driven by a drive source (not shown), such as a motor, provided in the housing 2. When the second cover 52 is closed, the drive gear 70 and the driven gear 74 mesh with each other, and power is transmitted from the drive gear 70 to the driven gear 74. The transmission unit 73 transmits the power obtained from the drive gear 70 to the drive roller 36a constituting the transport roller pair 36 and the drive roller 37a constituting the transport roller pair 37.

[0058] 4 and 5, an inner door 53 is provided inside the second cover 52. The inner door 53 is an opening / closing body that can rotate around a rotation shaft 53a (FIG. 1), and is disposed in the -Z direction further than the positions of the first cover 51 and a first path forming member 61 (described later). In this embodiment, the axial center line of the rotation shaft 53a is parallel to the Z axis. The inner door 53 is rotatable between an open state (FIG. 5) in which a portion of the discharge path T5 is exposed, and a closed state (FIG. 4) in which the portion is not exposed. The rotation shaft 53a of the inner door 53 is provided near the end of the inner door 53 in the +Y direction, so that the end of the inner door 53 in the -Y direction is the free end when rotating. When the second cover 52 is open, the middle door 53 can be opened and closed without being affected by whether the first cover 51 is open or closed.

[0059] The middle door 53 forms a part of the switchback path T2 and also forms a part of the discharge path T5. When the middle door 53 is opened, a part of the discharge path T5 is exposed. This makes it possible to carry out a jam clearance operation when a jam occurs in the discharge path T5.

[0060] A first path forming member 61 that forms a part of the switchback path T2 is provided integrally with the first cover 51 on the inner side of the first cover 51. Further, on the inner side of the second cover 52, a second path forming member 62 is located in the −Z direction with respect to the first path forming member 61 and is integrally provided with the second cover 52 to form a part of the switchback path T2.

[0061] When the first cover 51 is opened, the upper part of the switchback path T2, particularly the curved path portion T2a (FIG. 1), is exposed. This makes it possible to carry out a jamming operation when a jam occurs in the upper part of the switchback path T2. When the second cover 52 is opened, the lower part of the switchback path T2 is exposed. This allows the jamming process to be cleared if a jam occurs at the lower part of the switchback path T2. When the second cover 52 is opened, the nip between the transport roller pairs 36 and 37 is released.

[0062] 6 and 7, the first path forming member 61 has a protrusion 61a at the end in the -Z direction that protrudes toward the second path forming member 62. A plurality of protrusions 61a are provided at appropriate intervals along the Y axis direction, i.e., the medium width direction. 6 and 7, the second path forming member 62 has a recess 62a at an end in the +Z direction. A plurality of recesses 62a are provided at appropriate intervals along the Y direction, i.e., the medium width direction. The recess 62a can receive the protrusion 61a when the first cover 51 and the second cover 52 are closed.

[0063] With this configuration, when viewed from the medium width direction, the -Z direction end portion that is part of the first path forming member 61 and the +Z direction end portion that is part of the second path forming member 62 are overlapped as shown by the symbol S1 in Fig. 12. That is, a comb-tooth structure is formed by the -Z direction end portion of the first path forming member 61 and the +Z direction end portion of the second path forming member 62. This makes it possible to prevent the leading edge of the medium from getting caught on the first path forming member 61 when moving from the -Z direction to the +Z direction.

[0064] The first cover 51 can be opened and closed independently, without being affected by the open / closed state of the second cover 52. Similarly, the second cover 52 can be opened and closed independently, without being affected by the open / closed state of the first cover 51. This will be explained in more detail below.

[0065] Fig. 11 is a diagram for explaining the problem to be solved by the printer 1 according to this embodiment, and is a comparative example to this embodiment. In Fig. 11, reference numerals 151, 152, 161, and 162 correspond to the first cover 51, the second cover 52, the first path forming member 61, and the second path forming member 62 described above, respectively. 11, the rotation shaft 151a of the first cover 151 is provided near the end of the first cover 151 in the +Z direction, and the first cover 151 rotates with the end of the first cover 151 in the -Z direction as the free end. The axis center line of the rotation shaft 151a is parallel to the Y axis. Further, the rotation shaft 152a of the second cover 152 is provided near the end of the second cover 152 in the -Z direction, and the second cover 152 rotates with the end of the second cover 152 in the +Z direction as the free end. The axis center line of the rotation shaft 152a is parallel to the Y axis.

[0066] The first path forming member 161 and the second path forming member 162 have a comb-tooth structure at their opposing portions, like the above-described first path forming member 61 and second path forming member 62. Reference numeral 161a denotes a protrusion provided at the end of the first path forming member 161 in the -Z direction. Reference numeral 162a denotes a protrusion provided at the end of the second path forming member 162 in the +Z direction. The protrusions 161a and the protrusions 162a are alternately positioned along the Y-axis direction, i.e., the medium width direction, to form a comb-tooth structure.

[0067] Such a comb-tooth structure is necessary for the leading edge of the medium to move from one of the first path forming member 161 and the second path forming member 162 to the other without getting caught. However, there is a concern that when attempting to open the first cover 151, the protruding portion 161a of the first path forming member 161 will get caught on the second cover 152, and also that when attempting to open the second cover 152, the protruding portion 162a of the second path forming member 162 will get caught on the first cover 151. Therefore, in order to avoid such a problem, it is necessary to secure a gap G1 between the first cover 151 and the second cover 152 as shown in Fig. 11, but such a configuration makes it easier for dust and the like to enter the inside of the device through the gap G1.

[0068] Therefore, in this embodiment, the gap G1 between the first cover 151 and the second cover 152 is reduced while ensuring the comb-tooth structure by using the following configuration. As shown in Figure 12, when the first cover 51 and the second cover 52 are closed, the -Z direction end M1 of the first path forming member 61, i.e., the end M1 of the protrusion 61a, is positioned in the -Z direction further than the +Z direction end N2 of the second cover 52. Furthermore, when the first cover 51 and the second cover 52 are in a closed state, the end M2 in the +Z direction of the second path forming member 62 is located further in the -Z direction than the end N1 of the first cover 51 in the -Z direction. When the first cover 51 is opened from the closed state, the end M1 of the first path forming member 61 in the -Z direction moves in the +X direction, i.e., toward the inside of the device. This is because the rotation shaft 51a is aligned along the Y-axis direction and the end M1 is located below the rotation shaft 51a.

[0069] As described above, when the first cover 51 and the second cover 52 are in a closed state, the end M1 of the first path forming member 61 is located in the -Z direction further than the end N2 of the second cover 52 in the +Z direction, and when the first cover 51 is opened from a closed state, the end M1 of the first path forming member 61 moves toward the inside of the device. Therefore, when the first cover 51 is opened, the end M1 of the first path forming member 61 does not interfere with the second cover 52, and the first cover 51 can be opened and closed independently. Furthermore, when the first cover 51 and the second cover 52 are closed, the end M2 of the second path forming member 62 is located in the -Z direction further than the end N1 of the first cover 51. Therefore, when the second cover 52 is opened, the end M2 of the second path forming member 62 does not interfere with the first cover 51, and the second cover 52 can be opened and closed independently. As described above, interference between the first cover 51 and the second cover 52 can be avoided when opening and closing them, so there is no need to secure a large gap between the first cover 51 and the second cover 52, and the intrusion of dust into the inside of the device can be suppressed.

[0070] 7 and 9, the recess 62a formed in the second path forming member 62 in this embodiment has a bottom surface 62b along the switchback path T2. This makes it possible to prevent dust and the like from entering the inside of the device through the connection portion between the first path forming member 61 and the second path forming member 62 when the first cover 51 and the second cover 52 are in a closed state. However, instead of providing a recess 62a at the +Z direction end of the second path forming member 62, a protrusion (not shown) protruding in the +Z direction may be provided to form a comb-tooth structure together with the protrusion 61a of the first path forming member 61.

[0071] 1, in this embodiment, the vertical dimension Z2 of the second cover 52 is larger than the vertical dimension Z1 of the first cover 51. The rotation axis La1 (see FIG. 2) of the first cover 51 is along the Y-axis direction, i.e., the medium width direction, and the first cover 51 opens and closes by rotating with the end in the +Z direction as the free end. The rotation axis La2 (see FIG. 2) of the second cover 52 is along the vertical direction. This provides the following advantageous effects: In a configuration in which the vertical dimension Z2 of the second cover 52 is larger than the vertical dimension Z1 of the first cover 51, if the axis of rotation La2 of the second cover 52 is aligned along the Y-axis direction and the upper end portion is rotated as the free end, or if the lower end portion is rotated as the free end, the space required for opening and closing the cover will be large. However, according to the present embodiment, since the axis La2a of rotation of the second cover 52 is aligned along the vertical direction, the space required for opening and closing the second cover 52 can be reduced.

[0072] Also, the second cover 52 opens and closes by rotating in the Y-axis direction, i.e., the device depth direction, with the end in the -Y direction, i.e., the front side, as the free end. As a result, when the second cover 52 is opened from a closed state, the second cover 52 opens toward the rear of the device, and the second cover 52 is unlikely to get in the way when opening the second cover 52 to clear a jam.

[0073] In this embodiment, the first cover 51 and the second cover 52 are provided on the right side of the device, but they may be provided on the left side, on the back of the device, or on the front of the device. The second cover 52 may be configured so as to be opened and closed by rotating its rear end in the device depth direction as a free end. The axis of rotation La2 of the second cover 52 may be provided parallel to the Y-axis direction. In this case, the free end of the second cover 52 may be the end in the +Z direction or the end in the -Z direction.

[0074] In the present embodiment, the switchback path T2 has a curved portion formed by an end of the first path forming member 61 in the +Z direction, which is a curved path portion T2a. Therefore, media is likely to jam in the curved path section T2a, but since the first cover 51 opens and closes by rotating with the end in the +Z direction as the free end, when the first cover 51 is opened, the curved path section T2a opens wide, making it easy to clear the jam.

[0075] Next, a third path forming member 63 that is disposed opposite the first path forming member 61 and forms part of the switchback path T2 will be described. When the first cover 51 is opened as shown in FIGS. 3 and 5, the third path forming member 63 is exposed. The third path forming member 63 is provided with a receiving portion 63a that receives the protrusion 61a, which is the -Z direction end of the first path forming member 61, when the first cover 51 is opened as shown in Figures 8, 9, and 10.

[0076] The receiving portion 63a is formed so as to be recessed in the +X direction. The receiving portion 63a is provided at a position corresponding to the protruding portion 61a along the Y axis direction, i.e., the medium width direction. This makes it possible to prevent the protruding portion 61a of the first path forming member 61 from colliding with the third path forming member 63 when the first cover 51 is opened. Furthermore, this makes it possible to prevent the protruding portion 61a of the first path forming member 61 from digging into the medium when the first cover 51 is opened if a medium is stuck between the first path forming member 61 and the third path forming member 63.

[0077] Next, the inner door 53 will be further described. If the switchback path T2 is the first transport path, the second transport path is provided further inside the device than the first transport path. In this embodiment, the second transport path is the discharge path T5. In other words, the second transport path is located in the +X direction with respect to the first transport path. The middle door 53 is an opening / closing body that faces the second path forming member 62, and forms a part of the switchback path T2 and also forms a part of the discharge path T5. By opening the middle door 53, a jam clearance operation can be performed when a medium jam occurs in the discharge path T5. Here, the inner door 53 is disposed in a position where it does not interfere with the first cover 51 and the first path forming member 61 when opening and closing. Specifically, the inner door 53 is disposed further in the -Z direction with respect to the first cover 51 and the first path forming member 61. This allows the middle door 53 to be opened and closed without opening the first cover 51, improving the ease of use of the device.

[0078] Next, second cover 52A and inner door 53A, which are modifications of second cover 52 and inner door 53, respectively, will be described with reference to FIG. 13 and subsequent figures. The second cover 52A differs from the above-described second cover 52 in that the second cover 52A includes a cover member 78 and a pressing portion 51d. As shown in Fig. 13, the cover member 78 covers the transmission part 73 (see Fig. 4) so ​​as to expose the driven gear 74. Reference numeral 76 denotes a cam that abuts against an abutment part (not shown) provided on the housing 2 when the second cover 52A is closed, thereby determining the relative position between the driven gear 74 and the driving gear 70 (see Fig. 4). If the cam 76 is damaged or scratched, the relative position between the driven gear 74 and the driving gear 70 becomes inappropriate, and the meshing between the two becomes inappropriate. As a result, power is not properly transmitted from the driving gear 70 to the driven gear 74. The same applies when the driven gear 74, i.e., the transmission part 73, is damaged.

[0079] The cover member 78 suppresses the above-mentioned damage to the cam 76 and the transmission part 73. In other words, if the cover member 78 is not provided, the transmission part 73 and the cam 76 may collide with the middle door 53A when the second cover 52A is opened or closed, which may cause damage to the transmission part 73 and the cam 76. For this reason, the cover member 78 abuts against the middle door 53A when the second cover 52A is opened or closed, thereby forming a distance between the transmission part 73 and the cam 76 and the middle door 53A so that the transmission part 73 and the cam 76 do not collide with the middle door 53A when the second cover 52A is opened or closed.

[0080] More specifically, the cover member 78 has an abutment portion 78a at an upper portion thereof, which is a portion that abuts against the middle door 53A. The abutment portion 78a may be a separate part independent of the cover member 78, or may be formed integrally with another part different from the cover member 78. The abutment portion 78a has a first abutment portion 78b which is a corner portion, a third abutment portion 78d which is a corner portion farther from the hinge portion 52a, i.e., the rotation axis of the second cover 52A, than the first abutment portion 78b, and a second abutment portion 78c which is a surface between the first abutment portion 78b and the third abutment portion 78d.

[0081] The inner door 53A has abutment portion 53b as shown in Fig. 14. The abutment portion 53b is a flat surface parallel to the surface of the medium transported through the switchback path T2 (see Fig. 1). The abutment portion 53b is formed at the upper end of the inner door 53A so as to extend in the medium width direction. The above-mentioned abutment portion 78a abuts against this abutment portion 53b. 15A to 15E show a simplified view of second cover 52A and inner door 53A, and also show the transition of operations when second cover 52A and inner door 53A that are open are closed. 15A shows a state in which inner door 53A is opened by 90 degrees, which is the fully open state of inner door 53A.

[0082] When the second cover 52 is closed from the fully open state, the first contact portion 78b of the contact portion 78a contacts the contacted portion 53b. This creates a distance between the transmission portion 73 (driven gear 74) and the cam 76 and the inner door 53A, and prevents the transmission portion 73 (driven gear 74) and the cam 76 from colliding with the inner door 53A.

[0083] When the second cover 52 is further closed, the abutting portion 78a pushes the inner door 53A, and the inner door 53A is also closed together with the second cover 52. In the process of closing the second cover 52, the part of the abutting portion 78a that abuts against the abutted portion 53b transitions from the first abutting portion 78b to the second abutting portion 78c to the third abutting portion 78d, as shown in the transition from FIG. 15A to FIG. 15B and the transition from FIG. 15B to FIG. 15C. In FIG. 15C, the third abutting portion 78d abuts against the Y-direction end of the abutted portion 53b. When the second cover 52 is further closed, the abutting portion 78a comes off the abutted portion 53b, as shown in the transition from FIG. 15C to FIG. 15D.

[0084] Here, as shown in FIG. 15D, a pressing portion 52d is provided at a position far from the hinge portion 52a in the second cover 52A. A pressed portion 53c is provided at a position where the pressing portion 52d can come into contact with the inner door 53A. After the contact portion 78a is released from the contact portion 53b, the pressing portion 52d comes into contact with the pressed portion 53c and pushes the inner door 53A in the closing direction. This allows the second cover 52A and the inner door 53A to be closed, as shown in the transition from FIG. 15D to FIG. 15E. In the process of transition from FIG. 15A to the state of FIG. 15E, a distance is always formed between the transmission portion 73 (driven gear 74) and the cam 76 and the inner door 53A by the contact portion 78a.

[0085] In addition, when FIG. 15A shows the middle door 53A and the second cover 52A in a fully open state, the second cover 52A is restricted from further opening by a restricting portion (not shown). In this state, when performing work such as jam removal, an operator may apply an external force in the opening direction to the middle door 53A. In this case, the contacted portion 53b presses against the contact portion 78a. If an external force is applied only to the contact portion between the contacted portion 53b and the contact portion 78a, stress may be concentrated and the contacted portion 53b and the contact portion 78a may be damaged. In order to prevent this, the contact portions (not shown) between the middle door 53A and the second cover 52A are provided at multiple locations (for example, two locations) in the Z-axis direction. This makes it possible to prevent damage to the contacted portion 53b and the contact portion 78a when an external force in the opening direction is applied to the middle door 53A in the fully open state of the middle door 53A and the second cover 52A.

[0086] As described above, the second cover 52A has the abutment portion 78A that abuts against the inner door 53A when the second cover 52A is opened or closed, thereby forming a distance between the transmission portion 73 and the inner door 53A. This makes it possible to prevent the transmission portion 73 from colliding with the inner door 53A when the second cover 52A is opened or closed. As a result, it is possible to prevent the power from being not transmitted from the drive gear 70 to the drive rollers 36a, 36b.

[0087] Furthermore, the abutment portion 53b of the middle door 53A is provided at a position facing the surface of the medium transported through the switchback path T2. This makes it possible to prevent the device from becoming larger in size in the direction along the surface of the medium, for example, in the Y-axis direction, compared to a case in which the abutment portion 53b is provided at a position not facing the surface of the medium transported through the switchback path T2.

[0088] 14, the middle door 53A has a rib 53d along the transport direction at a position facing the surface of the medium transported through the switchback path T2. A plurality of ribs 53d are provided along the Y-axis direction, i.e., the medium width direction. This allows the medium to be transported smoothly. The contacted portion 53b is provided at a position outside the area where the rib 53d is formed. If the contact portion 78a comes into contact with the rib 53d, the rib 53d may be damaged, and the medium may not be able to pass through the rib 53d smoothly. However, since the contacted portion 53b is provided at a position outside the formation area of ​​the rib 53d, damage to the rib 53d can be suppressed, and the medium can be transported smoothly. Furthermore, the contact portion 78a comes into contact with the rib 53d, thereby making it possible to prevent the relative displacement between the second cover 52A and the inner door 53A from being hindered.

[0089] Furthermore, the inner door 53A includes a driven roller 39 that suppresses contact of the medium transported in the +Z direction with the contact portion 53b in the -Z direction relative to the contact portion 53b on the switchback path T2. This provides the following advantageous effects. The contact between the contact portion 78a and the contacted portion 53b may cause scratches on both. Since the contacted portion 53b is provided at a position facing the surface of the medium transported on the switchback path T2, if scratches are formed on the contacted portion 53b, the medium may not be able to smoothly pass through the position of the contacted portion 53b when passing through the contacted portion 53b. However, the middle door 53A is provided with a driven roller 39 that suppresses contact of the medium transported in the +Z direction with the contacted portion 53b in the -Z direction relative to the contacted portion 53b on the switchback path T2. This allows the medium transported in the +Z direction to smoothly pass through the position of the contacted portion 53b.

[0090] In this embodiment, the abutted portion 53b is located at the end of the middle door 53A in the +Z direction. The end of the third path forming member 63 in the -Z direction is formed as a rounded surface 63b as shown in Fig. 16. The abutted portion 53b is located on the -X side of the rounded surface 63b, that is, in a position advanced into the switchback path T2. The symbol Gp is ​​the distance in the X-axis direction between the -X side terminal position of the rounded surface 63b and the abutted portion 53b. As described above, the -Z direction end of the third path forming member 63 is formed as an R surface 63b, thereby preventing the leading edge of the medium transported in the +Z direction from getting caught on the -Z direction end of the third path forming member 63. Furthermore, since the abutment portion 53b is located further toward the switchback path T2 than the R surface 63b, the leading edge of the medium transported in the +Z direction can be prevented from getting caught on the -Z direction end of the third path forming member 63 when it passes through the abutment portion 53b and reaches the third path forming member 63.

[0091] Furthermore, the present invention is not limited to the embodiments and modifications described above, but various modifications are possible within the scope of the invention described in the claims, and it goes without saying that these are also included in the scope of the present invention. [Explanation of symbols]

[0092] 1...inkjet printer, 2...casing, 3...first media cassette, 7...internal discharge section, 8...tilt panel, 10A, 10B, 10C, 10D...ink storage section, 11A, 11B, 11C, 11D...mounting section, 12...waste liquid storage section, 13...conveyor belt, 14, 15...pulley, 19...supply roller, 20...separation roller, 21...pick roller, 25...feed roller pair, 28, 31, 32, 33, 34, 35A, 35B, 36, 37, 38...conveyor roller pair, 36a...drive roller, 36b...driven roller, 37a...drive roller, 37b...driven roller, 39...driven roller, 41...flap, 43...head unit, 44...line head, 51...first cover, 51a...rotating shaft, 51c...grip, 52, 52A...second Cover, 52a... hinge portion, 52c... grip portion, 52d... pressing portion, 53, 53A... inner door, 53a... rotating shaft, 53b... abutting portion, 53c... pressing portion, 53d... rib, 61... first path forming member, 61a... protruding portion, 62... second path forming member, 62a... recessed portion, 62b... bottom surface, 63... third path forming member, 63a... receiving portion, 63b... R surface, 70... driving gear, 73... transmission Reach portion, 74...driven gear, 76...cam, 78...cover member, 78a...contact portion, 78b...first contact portion, 78c...second contact portion, 78d...third contact portion, 90...post-processing unit, 91...processing tray, 92...post-processing portion, 93...loading tray, 100...medium transport device, T1...transport path during recording, T2...switchback path, T3...connection path, T4...reversal path, T5...ejection path

Claims

1. A housing and a transport path provided inside the housing and configured to transport a medium along a transport direction including a first direction and a second direction opposite to the first direction; a first cover that is rotatable between an open state in which a portion of the transport path is exposed and a closed state in which the portion is not exposed; a second cover that is rotatable between an open state in which a portion of the transport path is exposed and a closed state in which a portion of the transport path is not exposed, and that is disposed in the second direction relative to the first cover so as to be aligned with the first cover; a first path forming member that is a member provided inside the first cover and that forms a part of the transport path; a second path forming member that is provided on an inner side of the second cover and is located in the second direction relative to the first path forming member and forms a part of the transport path; Equipped with when viewed from a medium width direction that is a direction intersecting the transport direction, a second direction end of the first path forming member and a first direction end of the second path forming member overlap with each other when the first cover and the second cover are closed; when the first cover and the second cover are closed, the second direction end of the first path forming member is located in the second direction further than the first direction end of the second cover, when the first cover and the second cover are closed, the first direction end of the second path forming member is located in the second direction further than the second direction end of the first cover, When the first cover is opened from a closed state, the second direction end of the first path forming member moves toward the inside of the device. A medium transport device comprising:

2. 2. The medium transport device according to claim 1, a protruding portion protruding in the second direction is provided at an end portion of the first path forming member in the second direction, a recess for receiving the protrusion and having a bottom surface along the transport path is formed at an end of the second path forming member in the first direction; when the first cover and the second cover are closed, the protrusion fits into the recess, so that a portion of the first path forming member overlaps a portion of the second path forming member when viewed from the medium width direction. A medium transport device comprising:

3. 2. The medium transport device according to claim 1, the first direction is a vertically upward direction and the second direction is a vertically downward direction, The second cover has a vertical dimension larger than the vertical dimension of the first cover, The axis of rotation of the first cover is aligned along the medium width direction, the first cover is opened and closed by rotating with the end in the first direction as a free end, The axis of rotation of the second cover is aligned vertically. A medium transport device comprising:

4. 4. The medium transport device according to claim 3, the first cover and the second cover are provided on a right side surface or a left side surface of the housing, the second cover is opened and closed by rotating with a front end in the device depth direction as a free end; A medium transport device comprising:

5. 4. The medium transport device according to claim 3, a portion of the conveying path formed by an end portion of the first path forming member in the first direction is curved; A medium transport device comprising:

6. 2. The medium transport device according to claim 1, a third path forming member that is a member disposed opposite to the first path forming member and forms a part of the transport path; The third path forming member is provided with a receiving portion that receives the second direction end portion of the first path forming member when the first cover is opened. A medium transport device comprising:

7. 2. The medium transport device according to claim 1, the transport path being a first transport path; and a second transport path being located further inward than the first transport path. an inner door facing the second path forming member, the inner door forming a part of the first transport path and a part of the second transport path; Equipped with the inner door is rotatable between an open state in which a portion of the second transport path is exposed and a closed state in which a portion of the second transport path is not exposed. A medium transport device comprising:

8. 8. The medium transport device according to claim 7, The middle door is disposed at a position where it does not interfere with the first cover and the first path forming member when opening and closing. A medium transport device comprising:

9. 8. The medium transport device according to claim 7, a transport section provided in the second cover and configured to transport a medium along the first transport path; A drive unit provided in the housing and configured to drive the transport unit; a transmission unit provided in the second cover and configured to transmit power from the drive unit to the transport unit; Further equipped with The second cover has an abutment portion that abuts against the middle door when the second cover is opened or closed to form a distance between the transmission portion and the middle door. A medium transport device comprising:

10. 10. The medium transport device according to claim 9, The middle door has a contacted portion that contacts the contact portion when the second cover is opened or closed, the contact portion is provided at a position facing a surface of the medium transported through the first transport path; A medium transport device comprising:

11. 11. The medium transport device according to claim 10, the inner door has a rib along the transport direction at a position facing a surface of the medium transported through the first transport path, The abutment portion is provided at a position outside a region where the rib is formed. A medium transport device comprising:

12. 11. The medium transport device according to claim 10, the inner door includes a driven roller that suppresses contact of the medium transported in the first direction with the contact portion in the second direction relative to the contact portion in the first transport path, A medium transport device comprising:

13. 11. The medium transport device according to claim 10, a third path forming member that is a member disposed opposite to the first path forming member and forms a part of the first transport path; The abutment portion is located at an end portion of the middle door in the first direction, An end portion of the third path forming member in the second direction is formed as an R surface, the contact portion is located at a position that is advanced toward the first transport path side from the R surface, A medium transport device comprising:

14. a recording unit for recording on a medium; The medium transport device according to any one of claims 1 to 13; A recording device comprising:

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