Recording apparatus

Abstract

An adjustment cam for moving a head and a rack-and-pinion mechanism are driven by different power sources, and thus it is possible to cause an increase in cost and an increase in size of the device. The recording apparatus includes a recording unit that is movable with respect to a conveyance path and a moving unit that moves the recording unit, and a moving region of the recording unit includes a first region and a second region that is farther from the conveyance path than the first region. The moving unit includes a first moving unit that moves the recording unit in the first region and a second moving unit that moves the recording unit in the second region, and when the recording unit moves from the first region to the second region, the recording unit transitions from a state in which the recording unit is moved by the first moving unit to a state in which the recording unit is moved by the second moving unit. When transitioning from the second region to the first region, the first moving portion and the second moving portion are driven by a common driving source and transitioned from a state moved by the second moving portion to a state moved by the first moving portion.

Description

Technical Field

[0001] The present invention relates to a recording device for recording on a medium. Background Art

[0002] The recording device described in Patent Document 1 includes a head unit that can move between a recording position for recording on a medium and a retracted position retracted from a medium conveyance path. The head unit finely adjusts its position relative to the medium conveyance path at a position close to the medium conveyance path by an adjustment cam. In addition, the head unit is largely displaced relative to the medium conveyance path by a moving mechanism constituted by a rack and pinion mechanism at a position far from the medium conveyance path.

[0003] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2023-076882

[0004] In the recording device described in Patent Document 1, since the above-described adjustment cam and the rack and pinion mechanism are driven by different power sources, there is a possibility of increasing the cost and size of the device. Summary of the Invention

[0005] In order to solve the above technical problems, a recording device of the present invention is characterized by including: a conveyance path that conveys a medium; a recording unit that can move relative to the conveyance path in a direction intersecting a recording surface of the medium; and a moving unit that moves the recording unit. A moving area of the recording unit has: a first area; and a second area that is farther from the conveyance path than the first area. The moving unit includes: a first moving unit that moves the recording unit in the first area; and a second moving unit that moves the recording unit in the second area. When the recording unit migrates from the first area to the second area, it transfers from a state of moving by the first moving unit to a state of moving by the second moving unit, and when migrating from the second area to the first area, it transfers from a state of moving by the second moving unit to a state of moving by the first moving unit. The first moving unit and the second moving unit are driven by a common drive source. Brief Description of the Drawings

[0006] Figure 1 It is a diagram showing an overall medium conveyance path of a printer.

[0007] Figure 2 It is a top view of a head surface of a line head.

[0008] Figure 3 It is a perspective view of a cover unit.

[0009] Figure 4 It is a block diagram showing a control system related to the movement of a line head.

[0010] Figure 5 It is a diagram showing the movement progression of the line head and the baffle.

[0011] Figure 6 It is a perspective view of the head unit, the guide frame, and the base frame.

[0012] Figure 7 It is a perspective view of the guide frame and the head unit.

[0013] Figure 8 It is a perspective view of the head unit and the rotating body.

[0014] Figure 9 It is a perspective view of the reduction mechanism that transmits power from the head movement motor to the rotating body.

[0015] Figure 10 It is a perspective view of the head unit and the linear encoder.

[0016] Figure 11 It is a perspective view of the rotating body.

[0017] Figure 12 It is a front view of the rotating body.

[0018] Figure 13 It is a perspective view of the rotating body and the rack member.

[0019] Figure 14 It is a perspective view of the rotating body and the rack member.

[0020] Figure 15 It is a perspective view of the rotating body and the rack member.

[0021] Figure 16 It is a perspective view of the rotating body and the rack member.

[0022] Figure 17 It is a perspective view of the rotating body and the rack member.

[0023] Figure 18 It is a perspective view of the rotating body and the rack member.

[0024] Figure 19 It is a cross-sectional view of the head unit and the cover unit.

[0025] Figure 20 It is a cross-sectional view of the head unit and the cover unit.

[0026] Figure 21 It is a cross-sectional view of the head unit and the cover unit.

[0027] Figure 22 It is a graph of the rotation ENC position, rotation ENC speed, linear ENC position, linear ENC speed, and motor duty ratio when the line head descends.

[0028] Figure 23 It is a graph of the rotational ENC position, rotational ENC speed, linear ENC position, linear ENC speed, and motor duty ratio when the line head is raised.

[0029] Figure 24 It is a flowchart showing the process performed by the control unit.

[0030] Figure 25 It is a flowchart showing the process when the origin position is set while raising the line head.

[0031] Figure 26 It is a flowchart showing the process when the origin position is set while lowering the line head.

[0032] Figure 27 It is a table showing the relationship between the head movement speed, motor rotation speed, motor drive load, and torque limit value in each of the rod drive area, cam drive area, and rack and pinion drive area.

[0033] Figure 28 It is a flowchart showing the process from when the normal power supply is disconnected to when the power supply is not turned on.

[0034] Description of Reference Numerals

[0035] 1: Inkjet printer; 2: Media storage cassette; 3: Paper feed roller; 5: Feed roller; 6: Separation roller; 8: Reverse roller; 9: First clamping roller; 10: Second clamping roller; 12: Media support portion; 13: Feed roller; 14: Separation roller; 15: First pair of conveying rollers; 16: Driving roller; 17: Driven roller; 19: Second pair of conveying rollers; 20: Driving roller; 20a: Rotation shaft; 21: Driven roller; 22: Media detection portion; 27: Third pair of conveying rollers; 28: Discharge roller pair; 29: Discharge tray; 30: Head unit; 31: Unit frame; 32, 32A, 32B: Rack member; 32a: Contact portion; 32b: Pressed portion; 32c, 32d: Guided portion; 33: Guide frame; 33a: First guide portion; 33b: Second guide portion; 33A, 33B: Base frame; 34: Mounting frame; 35: Linkage mechanism; 40: Line head; 40a: Protrusion; 41: Base; 41d: Rack portion; 42: Plate member; 42a: Head surface; 42d: Opening; 43: Head chip; 44: Nozzle; 45: Opposing portion; 45a: Opening; 46: Upstream support portion; 47: Baffle; 49: Second moving portion; 54: Helical spring; 60: Cover unit; 61: Cover portion; 61a: Elastic portion; 61b: Cover main body portion; 62: Base portion; 63: Cover spring; 65: First moving portion; 66: Cam; 70: Second moving portion; 71: Rack; 72: Pinion; 72a: First phase region; 73: Third moving portion; 74, 74A, 74B: Rotating body; 75: Pressing portion; 76: Reduction mechanism; 77: Shaft; 78: First bevel gear; 79: Second bevel gear; 80, 81, 82: Spur gear; 83: Worm gear; 84: Cylindrical worm; 100: Control portion; 101: Head movement motor; 103: Rotary encoder; 104: Rotary scale; 105: Second detection portion; 107: Linear encoder; 108: Linear scale; 109: First detection portion; 110: Moving unit; 115: Operation portion; 120: Arithmetic portion; 121: Motor control portion; 122: Motor driver; 123: Volatile memory; 124: Non-volatile memory; 125: Program; 126: Control parameter; Am1: First region; Am2: Second region; Am3: Third region; Hp0: Cover position; Hp1: Recording position; Hp2: Paper jam processing position. Detailed implementation mode

[0036] Hereinafter, the present invention will be outlined.

[0037] The recording apparatus according to the first mode is characterized by including: a conveyance path for conveying a medium; a recording unit that can move relative to the conveyance path in a direction intersecting the recording surface of the medium; and a moving unit that moves the recording unit. The moving area of the recording unit has: a first area; and a second area that is farther from the conveyance path than the first area. The moving unit includes: a first moving part that moves the recording unit in the first area; and a second moving part that moves the recording unit in the second area. When the recording unit migrates from the first area to the second area, it transfers from the state of moving by the first moving part to the state of moving by the second moving part, and when migrating from the second area to the first area, it transfers from the state of moving by the second moving part to the state of moving by the first moving part. The first moving part and the second moving part are driven by a common drive source.

[0038] According to this mode, the moving unit that moves the recording unit includes: a first moving part that moves the recording unit in the first area; and a second moving part that moves the recording unit in the second area. Moreover, since the first moving part and the second moving part are driven by a common drive source, an increase in the cost of the apparatus can be suppressed, and in addition, miniaturization of the apparatus can be achieved.

[0039] The second mode is a mode subordinate to the first mode, and is characterized in that the first moving part includes a cam that rotates by the power of the drive source and moves the recording unit by rotating while supporting the recording unit, and the second moving part includes: a rack provided on the recording unit; and a pinion that meshes with the rack and moves the recording unit by rotating using the power of the drive source.

[0040] According to this mode, since the first moving part includes a cam that rotates by the power of the drive source and moves the recording unit by rotating while supporting the recording unit, fine adjustment of the position of the recording unit can be performed at a position close to the conveyance path. As a result, the recording unit can be positioned at an appropriate position corresponding to the thickness of the medium.

[0041] In addition, the second moving part includes: a rack provided on the recording unit; and a pinion that meshes with the rack and moves the recording unit by rotating using the power of the drive source. Thereby, even when the second area is ensured to be large, the recording unit can be moved significantly accordingly, which can contribute to the convenience of maintenance work and the like.

[0042] The third mode is a mode subordinate to the second mode, characterized in that the recording device includes a rotating body in which the cam and the pinion are integrally formed and rotated by the power of the drive source.

[0043] According to this mode, since the cam and the pinion are integrally formed, power can be easily transmitted from the drive source to the first moving part and the second moving part. In addition, since there is no need to separately transmit power from the drive source to the first moving part and the second moving part, the number of components can be reduced. As a result, an increase in the cost of the device can be suppressed, and in addition, miniaturization of the device can be achieved.

[0044] The fourth mode is a mode subordinate to the third mode, characterized in that the pinion has a first phase region where a part of the teeth is missing, and when the first phase region faces the rack, the cam supports the recording part.

[0045] When the first moving part moves the recording part, if the second moving part also tries to move the recording part, the position adjustment of the recording part based on the first moving part may be disrupted. According to this mode, since the pinion has a first phase region where a part of the teeth is missing, and when the first phase region faces the rack, the cam supports the recording part, it is possible to suppress the second moving part from having an adverse effect when the first moving part moves the recording part.

[0046] The fifth mode is a mode subordinate to the fourth mode, characterized in that when transferring from the movement of the recording part based on the cam to the movement of the recording part based on the pinion, and when transferring from the movement of the recording part based on the pinion to the movement of the recording part based on the cam, a state is temporarily formed in which the cam contacts the recording part and the pinion meshes with the rack.

[0047] When a state occurs in which the recording part is not supported by either the cam or the pinion, the recording part drops, and defects may be generated in the recording part due to the impact.

[0048] According to this mode, since when transferring from the movement of the recording part based on the cam to the movement of the recording part based on the pinion, and when transferring from the movement of the recording part based on the pinion to the movement of the recording part based on the cam, a state is temporarily formed in which the cam contacts the recording part and the pinion meshes with the rack, the recording part will not drop as described above, and an impact on the recording part can be suppressed.

[0049] In addition, in the case where the cam and the pinion are separately formed, due to component tolerances or assembly errors, etc., it may not be possible to temporarily form a state in which the cam contacts the recording unit and the pinion meshes with the rack. However, according to the above-described third mode, since the cam and the pinion are integrally formed, the occurrence of the above-described defects can be suppressed.

[0050] The sixth mode is a mode subordinate to the fifth mode, and is characterized in that the recording unit includes a rack member integrally formed with an abutting portion that abuts against the cam and the rack.

[0051] Since the recording unit includes an abutting portion that abuts against the cam and a rack member integrally formed with the rack, it is easy to determine the positional relationship between the abutting portion and the rack.

[0052] Here, assuming that the abutting portion and the rack are separately formed, due to component tolerances or assembly errors, etc., it may not be possible to temporarily form a state in which the cam contacts the recording unit and the pinion meshes with the rack. However, since the abutting portion and the rack are integrally formed and the positional relationship between the abutting portion and the rack is easy to determine, the occurrence of the above-described defects can be suppressed.

[0053] It should be noted that this mode is not limited to the above-described fourth mode and may also be subordinate to the above-described fifth mode.

[0054] The seventh mode is a mode subordinate to the sixth mode, and is characterized by including: a frame that guides the recording unit in the moving direction of the recording unit; and a rotation axis of the rotating body, the rotation axis being rotatably supported by the frame.

[0055] According to this mode, since the rotation axis is rotatably supported by the frame that guides the recording unit in the moving direction of the recording unit, it is easy to determine the positional relationship between the rotating body and the rack member. Thereby, the positional relationship between the rack and the pinion is appropriately determined, and in addition, the positional relationship between the abutting portion and the cam is also appropriately determined. Therefore, the recording unit can be appropriately moved by the first moving portion and the second moving portion.

[0056] The eighth mode is a mode subordinate to the third mode. The recording unit includes a liquid ejection head. The liquid ejection head has a plurality of nozzles that eject liquid along the width direction intersecting the medium conveyance direction, and ejects liquid from the nozzles without moving in the width direction. At a position opposed to the liquid ejection head, there is a cover portion that covers the liquid ejection surface of the liquid ejection head. The cover portion can be displaced in a direction of advancing and retreating with respect to the liquid ejection head. The recording apparatus includes a pressing member that presses the cover portion toward the liquid ejection head. The recording unit can move further from the first region toward the position covered by the cover portion of the liquid ejection surface. A pressing portion is provided on the rotating body. After the contact between the contact portion that abuts against the cam in the recording unit and the cam is released, the pressing portion presses the recording unit toward the cover portion as the rotating body rotates.

[0057] In order to set the liquid ejection surface of the liquid ejection head in a state where it is reliably covered by the cover portion, it is necessary to push the liquid ejection surface against the pressing force of the pressing member to the cover portion. The first moving portion moves the recording unit in the first region, and also moves the recording unit by the rotation of the cam, and cannot push the liquid ejection surface to the cover portion.

[0058] However, according to this mode, a pressing portion is provided on the rotating body. After the contact between the contact portion that abuts against the cam in the recording unit and the cam is released, the pressing portion presses the recording unit toward the cover portion as the rotating body rotates. Thereby, the liquid ejection surface can be reliably pushed against the cover portion, and the liquid ejection surface can be reliably covered by the cover portion.

[0059] In addition, by providing the pressing portion on the rotating body, there is no need for an additional power source for reliably pushing the liquid ejection surface to the cover portion. As a result, an increase in the cost of the apparatus can be suppressed, and in addition, miniaturization of the apparatus can be achieved.

[0060] The ninth mode is a mode subordinate to the eighth mode, and is characterized in that a state where the cam supports the recording unit and a state where the pressing portion presses the recording unit are not formed simultaneously.

[0061] When a state where the cam supports the recording unit and a state where the pressing portion presses the recording unit are formed simultaneously, the rotating body may not be able to rotate. However, since a state where the cam supports the recording unit and a state where the pressing portion presses the recording unit are not formed simultaneously, a defect that the rotating body cannot rotate can be suppressed.

[0062] The tenth mode is a mode subordinate to the ninth mode, characterized in that the recording unit includes a rack member integrally formed by a pressed portion that is a portion engaged with the pressing portion, the abutting portion, and the rack.

[0063] Since the recording unit includes a pressed portion that is a portion engaged with the pressing portion, the abutting portion, and a rack member integrally formed with the rack, it is easy to determine the relative positional relationship among the pressed portion, the abutting portion, and the rack. Thus, it is possible to reliably achieve the configuration of the above-described ninth mode, that is, a configuration in which the state where the recording unit is supported by the cam and the state where the pressing portion presses the recording unit are not formed simultaneously.

[0064] Hereinafter, the present invention will be specifically described.

[0065] Hereinafter, an inkjet printer 1 will be described as an example of a recording apparatus that records on a medium. Hereinafter, the inkjet printer 1 will be simply referred to as the printer 1.

[0066] It should be noted that in the X - Y - Z coordinate system shown in each figure, the X - axis direction is the device width direction, which is the width direction of the medium on which recording is performed. When viewed from the operator of the printer 1, the +X direction is the left side, and the -X direction is the right side. Hereinafter, the X - axis direction may sometimes be referred to as the medium width direction or simply the width direction.

[0067] The Y - axis direction is the device depth direction, which is the direction along the medium conveyance direction during recording. The +Y direction is the direction from the back surface of the device toward the front surface, and the -Y direction is the direction from the front surface of the device toward the back surface. In the present embodiment, among the side surfaces surrounding the printer 1, the side surface in the +Y direction becomes the front surface of the device, and the side surface in the -Y direction becomes the back surface of the device.

[0068] The Z - axis direction is the direction along the vertical direction, which is the device height direction. The +Z direction is the vertically upward direction, and the -Z direction is the vertically downward direction.

[0069] It should be noted that hereinafter, the direction in which the medium is conveyed may sometimes be referred to as "downstream", and the opposite direction may be referred to as "upstream".

[0070] The medium conveyance path of the printer

[0071] Hereinafter, with reference to Figure 1 the medium conveyance path of the printer 1 will be described. As Figure 1 shown, the printer 1 includes a medium storage cassette 2 at the bottom of the device. The reference numeral P indicates the medium stored in the medium storage cassette 2. As an example of the medium, recording paper can be cited. The medium storage cassette 2 is provided so as to be detachable from the front side of the device.

[0072] A paper feed roller 3 driven by a motor (not shown) is provided above the media storage cassette 2. The paper feed roller 3 can move forward and backward relative to the media stored in the media storage cassette 2, and by contacting and rotating the media stored in the media storage cassette 2, the media is sent out from the media storage cassette 2 in the +Y direction.

[0073] A feed roller 5 driven by a motor (not shown) and a separation roller 6 given a rotational torque by a torque limiter (not shown) are provided downstream of the media storage cassette 2. The media sent out from the media storage cassette 2 is separated by being clamped between the feed roller 5 and the separation roller 6, and is further conveyed downstream.

[0074] A reversing roller 8 driven by a motor (not shown) is provided downstream of the feed roller 5 and the separation roller 6. A first clamping roller 9 and a second clamping roller 10 are provided around the reversing roller 8. The media is clamped by the reversing roller 8 and the first clamping roller 9, and then is clamped and conveyed by the reversing roller 8 and the second clamping roller 10. The conveying direction of the media is reversed from the +Y direction to the -Y direction by the reversing roller 8 and is conveyed downstream.

[0075] A first pair of conveying rollers 15 is provided downstream of the reversing roller 8. The first pair of conveying rollers 15 includes a driving roller 16 driven by a motor (not shown) and a driven roller 17 that can rotate idly. The media is conveyed by the first pair of conveying rollers 15 to a position facing the line head 40.

[0076] It should be noted that the printer 1 has, in addition to the media feeding path from the media storage cassette 2, a media feeding path from the media support portion 12. The media support portion 12 supports the media in an inclined posture, and the supported media is conveyed to the first pair of conveying rollers 15 by a feed roller 13 driven by a motor (not shown). Reference numeral 14 is a separation roller given a rotational torque by a torque limiter (not shown).

[0077] A media detection unit 22 is provided upstream of the first pair of conveying rollers 15. The control unit 100 (described later) (refer to Figure 4 ) can determine the position of the leading edge of the media relative to the line head 40 based on the detection information of the media detection unit 22, and can, for example, position the media at the recording start position.

[0078] The line head 40 is an example of a recording unit that records on the media. In addition, the line head 40 is an example of a liquid ejection head that ejects ink, which is an example of a liquid, onto the media and records. The line head 40 is a liquid ejection head in which a plurality of nozzles 44 that eject ink are arranged so as to cover the entire region in the width direction of the media. The line head 40 is long in the width direction of the media and is configured as a liquid ejection head that can record the entire region of the media width without moving in the width direction of the media.

[0079] Reference numeral 42a denotes a head surface that faces the medium. The head surface 42a may also be referred to as a liquid ejection surface or a nozzle surface. The head surface 42a is formed by a plate member 42 (see Figure 2 ). The head surface 42a is parallel to the medium conveyance direction, i.e., the Y-axis direction, at a position facing the line head 40. In addition, the head surface 42a is parallel to the X-Y plane. The two-dot chain line denoted by reference numeral Ta is a medium conveyance path between the line head 40 and the opposing portion 45. The medium conveyance path Ta is parallel to the X-Y plane.

[0080] The printer 1 includes an ink storage portion (not shown), and the ink ejected from the line head 40 is supplied to the line head 40 from the ink storage portion via an ink tube (not shown).

[0081] An opposing portion 45 is provided at a position of the line head 40 that faces the head surface 42a. The opposing portion 45 according to the present embodiment includes an upstream support portion 46 (see Figure 5 ), and a baffle 47 (see Figure 5 ), and the gap between the medium and the head surface 42a is defined by supporting the medium with the upstream support portion 46 and the baffle 47. Hereinafter, the gap between the opposing portion 45 and the head surface 42a may be referred to as an impression plate gap.

[0082] The line head 40 is arranged to be movable in the direction of advancing and retreating with respect to the opposing portion 45, i.e., the adjustment direction of the impression plate gap. In the present embodiment, the adjustment direction of the impression plate gap is parallel to the Z-axis direction.

[0083] Hereinafter, the movement of the line head 40 or other component parts in the +Z-axis direction may be referred to as "rising", and the movement in the -Z direction may be referred to as "descending".

[0084] As Figure 4 shown, the line head 40 moves along the Z-axis direction by the power of a head movement motor 101, which is an example of a drive source. Here, with reference to Figure 4 the movement operation of the line head 40 will be outlined. The power of the head movement motor 101 is converted into the Z-axis direction operation of the line head 40 by a movement unit 110. The movement unit 110 will be described again later.

[0085] The control unit 100 that controls the head movement motor 101 raises and lowers the line head 40 in accordance with the type of medium included in the received print data and the thickness of the medium, and adjusts the impression plate gap. For example, when the position of the line head 40 during recording on plain paper is taken as the first recording position, in the case of recording on a special sheet that is thicker than plain paper, the line head 40 is positioned at a second recording position that is raised relative to the first recording position. In the case where the medium still contacts the line head 40 even when the second recording position is selected, it is positioned at a third recording position that is further raised relative to the second recording position.

[0086] In Figure 4 FIGs., reference numerals Am1, Am2, Am3 denote the moving regions of the line head 40 with respect to the head surface 42a. The moving region of the line head 40 has a first region Am1 and a second region Am2 that is farther from the medium conveyance path Ta than the first region Am1. The first region Am1 includes the above-described first recording position, second recording position, and third recording position. Of course, the first region Am1 may also include other recording positions. In addition, in the present embodiment, the moving region of the line head 40 includes a third region Am3 that is below the first region Am1.

[0087] When the line head 40 moves to the position Hp2 that is the uppermost position of the second region Am2, the interval between the opposing portion 45 and the head surface 42a becomes the widest. Thereby, it is possible to remove the jammed medium in the case of a paper jam. Hereinafter, the position Hp2 is referred to as the paper jam processing position of the line head 40.

[0088] The position Hp1 is the recording position during recording on the medium. As described above, the position Hp1 varies according to the type of medium. That is, the recording position Hp1 includes the above-described first recording position, second recording position, and third recording position.

[0089] The position Hp0 is the lowermost position of the third region Am3. This position is the position where the cover portion 61 described later covers the head surface 42a. Hereinafter, the position Hp0 is referred to as the cover position of the line head 40.

[0090] Returning to Figure 1 FIG., a second conveyance roller pair 19 is provided downstream of the line head 40. The second conveyance roller pair 19 includes a drive roller 20 driven by a motor (not shown) and a driven roller 21 that can rotate idly. The medium on which recording has been performed is sent downstream by the second conveyance roller pair 19.

[0091] Downstream of the second pair of conveying rollers 19, a third pair of conveying rollers 27 is provided, and further downstream of the third pair of conveying rollers 27, a pair of discharging rollers 28 is provided. A discharging path facing downward is formed between the third pair of conveying rollers 27 and the pair of discharging rollers 28, and the medium on which recording has been performed is discharged by the pair of discharging rollers 28 to the discharging tray 29 with the latest recording surface facing downward.

[0092] Configuration of the line head

[0093] Next, with reference to Figure 2 The line head 40, which is an example of a liquid ejection head, will be further described.

[0094] As Figure 2 shown, the line head 40 has a plate member 42 on a base 41. The base 41 is a structure in which a flow path for supplying ink supplied from an ink storage portion (not shown) to the head chip 43 is provided inside.

[0095] The plate member 42 is a metal plate and forms a head surface 42a.

[0096] A plurality of openings 42d are formed in the plate member 42, and head chips 43 are provided in each of the openings 42d. A plurality of nozzles 44 (see Figure 1 ) are provided in the head chip 43 along the medium width direction. The plate member 42 and the head chip 43 are provided flush.

[0097] The head chips 43 are alternately arranged at an upstream position and a downstream position along the X-axis direction, i.e., the medium width direction. In the present embodiment, three head chips 43 are provided along the medium width direction at the upstream position, and four head chips 43 are provided along the medium width direction at the downstream position. Thus, a cover portion 61 described later that covers the head chips 43 is alternately arranged at the upstream position and the downstream position along the medium width direction.

[0098] The line head 40 is provided on the unit frame 31 and together with the unit frame 31 forms a head unit 30. The head unit 30 is a structure including the line head 40. Therefore, the components constituting the head unit 30 can be, in other words, the components provided on the line head 40.

[0099] The line head 40 or the head unit 30 is an example of a recording portion that performs recording on a medium. The power of the head movement motor 101 (see Figure 4 ) is transmitted to the unit frame 31, and thus the head unit 30, i.e., the line head 40, moves in the Z-axis direction.

[0100] Configuration of the cover unit

[0101] Next, with reference to Figure 3 the cover unit 60 will be described.

[0102] The cover unit 60 includes a cover portion 61 that covers the head chip 43. Since the head chip 43 is provided on the head surface 42a, the cover portion 61 can also be referred to as a member that covers a part of the head surface 42a. In addition, since the nozzle 44 is provided on the head chip 43, the cover portion 61 can also be referred to as a member that covers the nozzle 44.

[0103] A plurality of cover portions 61 constitute the cover unit 60. The cover unit 60 is provided on the lower side of the opposing portion 45.

[0104] The cover unit 60 is formed with a plurality of cover portions 61 on a base portion 62.

[0105] The cover portion 61 is formed in a shape that is long in the X-axis direction, and includes a cover main body portion 61b formed of a resin material or the like and an elastic portion 61a that is in contact with the head surface 42a and is formed of an elastic material such as rubber. The cover main body portion 61b is held by the base portion 62 so as to be displaceable in the Z-axis direction, and the movement limit in the +Z direction is defined by a limiting portion (not shown) formed in the base portion 62. The cover main body portion 61b is pressed in the +Z direction by a cover spring 63 that is an example of a pressing member. In the present embodiment, two cover springs 63 are provided for one cover main body portion 61b.

[0106] Each cover main body portion 61b is connected to a waste liquid pipe (not shown). This waste liquid pipe is connected to a pump (not shown). When the pump operates in a state where the cover portion 61 covers the head surface 42a, a negative pressure is generated inside the cover portion 61, and thereby ink is sucked from the nozzle 44 of the line head 40.

[0107] The cover portions 61 are alternately arranged at an upstream position and a downstream position along the X-axis direction, that is, the medium width direction. In the present embodiment, three cover portions 61 at the upstream position in the +Y direction are provided, and four cover portions 61 at the downstream position in the -Y direction are provided.

[0108] Such an arrangement of the cover portions 61 corresponds to the arrangement of the head chips 43 in the line head 40.

[0109] The cover portion 61 is exposed by moving a baffle 47 (to be described later) from a shielding position to an open position.

[0110] Configuration of the opposing portion

[0111] Next, with reference to Figure 5 the opposing portion 45 will be further described.

[0112] As Figure 5 shown, the opposing portion 45 that opposes the line head 40 includes an upstream support portion 46 and a baffle 47 that is downstream of the upstream support portion 46. The baffle 47 can move along the medium conveyance direction and can be in a shielding position shown by state ST1 in Figure 5 and an open position shown by state ST2 inFigure 5 It moves between the open positions shown by the medium states ST2 and ST3.

[0113] When the baffle 47 moves to the open position, an opening 45a is formed in the opposing portion 45, and the cover portion 61 is exposed inside the opening 45a.

[0114] In a state where the baffle 47 is in the open position, as shown in the medium state ST3 Figure 5 the line head 40 descends, so that the cover portion 61 can cover the head chip 43. At this time, the cover portion 61 is slightly pressed downward in the -Z direction against the pressing force of the cover spring 63, whereby the cover portion 61 is in close contact with the head surface 42a. It should be noted that the descent of the line head 40 when the cover portion 61 is in close contact with the head surface 42a is sometimes referred to as a "cover operation".

[0115] When the power of the device is turned off or in the recording standby state when the power is turned on, the control unit 100 is in a state where the head chip 43 is covered by the cover portion 61 in a state where the baffle 47 is in the open position. In addition, when performing a flushing operation for preventing clogging of the nozzles 44, the control unit 100 sprays ink onto the cover portion 61 in a state where the baffle 47 described later is set to the open position.

[0116] When the control unit 100 receives recording data and performs recording, the line head 40 is raised, the head surface 42a is spaced apart from the cover portion 61, and the baffle 47 described later is moved to the shielding position. Thereby, it is possible to suppress the medium being conveyed from entering the opening 45a of the opposing portion 45 or the posture of the medium from being disturbed. Moreover, it is possible to suppress foreign matters such as paper scraps from entering the cover portion 61 during the conveyance of the medium and the performance of the cover portion 61 from being impaired.

[0117] It should be noted that, in the present embodiment, the baffle 47 moves between the shielding position and the open position by means of a link mechanism 35 (refer to Figure 6 ) that operates by reversing the drive roller 20 that constitutes the second conveying roller pair 19.

[0118] It should be noted that the upstream support portion 46 is provided so as to be movable in the Z-axis direction and is pressed in the +Z direction by a coil spring 54 as an example of a pressing member. However, the upstream support portion 46 abuts against a limiting portion (not shown), and thus the movement in the +Z direction is restricted at a specified position.

[0119] Moreover, when performing the cover operation, the line head 40 presses the upstream support portion 46 downward in the -Z direction against the pressing force of the coil spring 54.

[0120] Configuration of the moving unit that moves the line head

[0121] Hereinafter, regarding the head moving motor 101 (refer to Figure 4The movement unit 110 that converts the power of () into the movement in the Z-axis direction of the line head 40 will be described.

[0122] First, the control unit 100 can use the detection information sent from the rotary encoder 103 (see Figure 4 ), and the detection information sent from the linear encoder 107 (see Figure 4 ) as a basis to grasp the position of the line head 40 in the Z-axis direction. It should be noted that hereafter, the term "encoder" will be abbreviated as "ENC".

[0123] As Figure 9 shown, the rotary ENC 103 is composed of a rotary scale 104 provided on the motor output shaft of the head movement motor 101 and a second detection unit 105 that detects the rotation of the rotary scale 104. The rotary ENC 103 detects the light-transmitting scale of the rotary scale 104 and outputs a detection pulse signal including a number of pulses proportional to the rotation amount of the motor output shaft.

[0124] In addition, the linear ENC 107 is composed of a linear scale 108 provided on the guiding frame 33 described later and a first detection unit 109 that detects the movement of the linear scale 108. The linear ENC 107 detects the light-transmitting scale of the linear scale 108 and outputs a detection pulse signal including a number of pulses proportional to the movement amount of the head unit 30.

[0125] As described above, the head unit 30 having the line head 40 is based on the unit frame 31, and the line head 40 is provided on the unit frame 31.

[0126] As Figure 8 shown, rack members 32 are provided at the +X-direction end and -X-direction end of the unit frame 31. The rack member 32 provided at the +X-direction end relative to the unit frame 31 is denoted by reference numeral 32A, and the rack member 32 provided at the -X-direction end is attached with reference numeral 32B. Hereafter, when there is no need to distinguish between the rack members 32A and 32B, they are collectively referred to as the rack member 32.

[0127] As Figure 7 shown, a guiding frame 33 is provided in the +Y direction relative to the unit frame 31. First guiding portions 33a are formed at the +X-direction end and -X-direction end of the guiding frame 33. The first guiding portion 33a is a portion that forms a plane parallel to the Y-Z plane. Moreover, a second guiding portion 33b is formed at the -Y-direction end of the first guiding portion 33a. The second guiding portion 33b is a portion that forms a plane parallel to the X-Z plane. It should be noted that, as Figure 6 shown, the guiding frame 33 is supported by base frames 33A and 33B spaced apart in the X-axis direction.

[0128] As shown Figure 8 in FIG. Figure 8 , guide portions 32c and 32d are provided on the rack member 32. Through the guide portions 32c and 32d, the first guide portion 33a of the guide frame 33 can be sandwiched in the X-axis direction. In addition, guide portions 32e and 32f are provided on the rack member 32. Through the guide portions 32e and 32f, the second guide portion 33b of the guide frame 33 can be sandwiched in the Y-axis direction. With such a configuration, the unit frame 31, that is, the head unit 30, is guided by the guide frame 33 in the Z-axis direction.

[0129] It should be noted that the shape of the rack member 32B is a shape that is line-symmetric with respect to the Y-axis at the intermediate position between the rack member 32A and the rack member 32B in the X-axis direction of the shape of the rack member 32A.

[0130] Next, as shown Figure 7 in FIG. Figure 7 , a shaft 77 parallel to the X-axis direction is rotatably supported by the guide frame 33. Rotating bodies 74 are provided near the +X-direction end portion and the -X-direction end portion of the shaft 77. The rotating body 74 provided near the +X-direction end portion of the shaft 77 is denoted by reference numeral 74A, and the rotating body 74 provided at the -X-direction end portion is denoted by reference numeral 74B. Hereinafter, when it is not necessary to distinguish between the rotating bodies 74A and 74B, they are collectively referred to as the rotating body 74.

[0131] It should be noted that the shape of the rotating body 74B is a shape that is line-symmetric with respect to the Y-axis at the intermediate position between the rotating body 74A and the rotating body 74B in the X-axis direction of the shape of the rotating body 74A.

[0132] The rotating body 74 rotates integrally with the shaft 77. It should be noted that hereinafter, the rotation directions of the shaft 77, the rotating body 74, and the pinion 72, the cam 66, and the pressing portion 75 described later are sometimes represented by the reference numerals C1 and C2 shown in the drawings.

[0133] As shown Figure 9 in FIG. Figure 9 , a first bevel gear 78 is provided between the rotating body 74A and the rotating body 74B. The first bevel gear 78 rotates integrally with the shaft 77. The first bevel gear 78 constitutes a speed reduction mechanism 76 (refer to Figure 9 ) for transmitting power from the head movement motor 101 to the shaft 77.

[0134] Hereinafter, the speed reduction mechanism 76 will be described with reference to Figure 9 FIG. Figure 9 .

[0135] The speed reduction mechanism 76 includes components such as a first bevel gear 78, a second bevel gear 79, a spur gear 80, a spur gear 81, a spur gear 82, a worm wheel 83, and a cylindrical worm 84.

[0136] The second bevel gear 79 meshes with the first bevel gear 78. The second bevel gear 79 and the spur gear 80 are integrally formed and are rotatably supported by a mounting frame 34 (see Figure 6 ). The mounting frame 34 is fixed to the guide frame 33 with screws. Further, a head movement motor 101 is fixed to the mounting frame 34 with screws.

[0137] The spur gear 80 meshes with the spur gear 81. The spur gear 81 is rotatably provided on the mounting frame 34 (see Figure 6 ). The spur gear 82 meshes with the spur gear 81. The spur gear 82 and the worm gear 83 are integrally formed and are rotatably provided on the mounting frame 34 (see Figure 6 ). The cylindrical worm 84 meshes with the worm gear 83, and a worm gear mechanism is constituted by the worm gear 83 and the cylindrical worm 84. The cylindrical worm 84 is provided on the output shaft (not shown) of the head movement motor 101. Thus, when the head movement motor 101 rotates, its rotation is transmitted to the shaft 77 via the reduction mechanism 76, and the shaft 77 rotates.

[0138] It should be noted that, in the present embodiment, the reduction ratio of the reduction mechanism 76, specifically, the reduction ratio of the power transmission from the head movement motor 101 to the shaft 77 is 111. The reduction ratio is preferably greater than 1, more preferably greater than 10, and further preferably greater than 100 as in the present embodiment.

[0139] Next, as shown in Figure 11 , a pinion 72 constituting a rack and pinion mechanism is provided on the rotating body 74. Further, a cam 66 is provided on the rotating body 74. Further, a rod-shaped pressing portion 75 is provided on the rotating body 74.

[0140] As shown in Figure 8 , Figure 10 , Figures 13 - 18 , a rack 71 constituting a rack and pinion mechanism is formed on the rack member 32. The rack 71 meshes with the pinion 72. Therefore, when the pinion 72 rotates, the head unit 30, i.e., the line head 40, moves in the Z-axis direction. Specifically, when the pinion 72 rotates in the rotation direction C1, the line head 40 descends, and when the rack 71 rotates in the rotation direction C2, the line head 40 ascends.

[0141] The rack 71 and the pinion 72 constitute a second moving portion 70 that moves the line head 40 in the second region Am2.

[0142] It should be noted that since the second moving portion 70 raises and lowers the line head 40 through a rack and pinion mechanism, the operation of raising and lowering the line head 40 through the second moving portion 70 may sometimes be referred to as "rack and pinion drive".

[0143] Further, as shown in Figure 8 , Figure 10 ,Figures 13 - 18 As shown, an abutting portion 32a capable of abutting against the cam 66 is provided on the rack member 32. The abutting portion 32a is provided so as to protrude in the +Y direction, and the cam 66 is disposed below the abutting portion 32a. The head unit 30, i.e., the line head 40, is supported by the cam 66 via the abutting portion 32a in the first region Am1, thereby defining the position in the Z-axis direction. In other words, the head unit 30, i.e., the line head 40, can be placed on the cam 66 by its own weight. It should be noted that the head unit 30, i.e., the line head 40, can be placed on the cam 66 only by its own weight, or can be placed on the cam 66 by receiving a pressing force in a direction including a vertically downward component from a spring or the like. When the head unit 30, i.e., the line head 40, is placed on the cam 66 by receiving a pressing force in a direction including a vertically downward component from a spring or the like, the floating of the head unit 30, i.e., the line head 40, is suppressed and the impression plate gap is stabilized.

[0144] The outer peripheral surface of the cam 66 is formed such that the distance from the axis center of the shaft 77, i.e., the radius, changes along the circumferential direction (see Figure 12 ). Therefore, when the cam 66 rotates in a state where the abutting portion 32a is placed on the cam 66, the head unit 30, i.e., the line head 40, moves in the Z-axis direction. Specifically, when the cam 66 rotates in the rotation direction C1, the line head 40 descends, and when the cam 66 rotates in the rotation direction C2, the line head 40 ascends.

[0145] The cam 66 and the abutting portion 32a constitute a first moving portion 65 that moves the line head 40 in the first region Am1.

[0146] It should be noted that since the first moving portion 65 raises and lowers the line head 40 by the cam 66, the operation of raising and lowering the line head 40 by the first moving portion 65 is sometimes referred to as "cam drive".

[0147] The first moving portion 65 and the above-described second moving portion 70 constitute a moving unit 110 (see Figure 4 ).

[0148] In addition, as Figure 10 , Figures 13 - 18 shown, a pressed portion 32b capable of abutting against the pressing portion 75 is provided on the rack member 32. The pressed portion 32b is provided so as to protrude in the +Y direction, and is configured such that the pressing portion 75 can abut against the pressed portion 32b from above.

[0149] When the rotating body 74 rotates in the rotation direction C1, the pressing portion 75 can press the pressed portion 32b from above, and press the head unit 30, that is, the line head 40 downward in the -Z direction, that is, downward. The pressing portion 75 and the pressed portion 32b constitute a third moving portion 73 that lowers the line head 40 in the third region Am3. It should be noted that when the line head 40 rises in the third region Am3, the line head 40 rises by receiving the pressing force of the coil spring 54 (see Figure 5 ), which is an example of the above-mentioned pressing member. Therefore, the coil spring 54 (see Figure 5 ) also constitutes the third moving portion 73.

[0150] It should be noted that since the third moving portion 73 raises and lowers the line head 40 by the rod-shaped pressing portion 75, the operation of raising and lowering the line head 40 by the third moving portion 73 is sometimes referred to as "rod drive" hereinafter.

[0151] In the present embodiment, the third moving portion 73 constitutes a moving unit 110 (see Figure 4 ).

[0152] Figure 12 The formation ranges of the cam 66 and the pinion 72 are shown.

[0153] The pinion 72 has a first phase region Ak1 in which a part of the teeth is missing and a second phase region Ak2 in which teeth are formed. It should be noted that hereinafter, when simply referred to as "pinion 72", for convenience, it refers to the part of the second phase region Ak2 in which teeth are formed.

[0154] In addition, the cam 66 has a non-supporting phase region Aj1 that does not support the abutting portion 32a and a supporting phase region Aj2 that can support the abutting portion 32a. In the supporting phase region Aj2, the radius Ra of the outer peripheral surface of the supporting abutting portion 32a changes along the circumferential direction. It should be noted that hereinafter, when simply referred to as "cam 66", for convenience, it refers to the part of the supporting phase region Aj2.

[0155] Hereinafter, the operations of the first moving portion 65, the second moving portion 70, and the third moving portion 73 will be further described.

[0156] Figure 13 The state in which the line head 40 is in the first recording position in the first region Am1 is shown. In this state, the first moving portion 65 functions. That is, the head unit 30 is placed on the cam 66 by its own weight. In this state, the rack 71 is not engaged with the pinion 72, and the pressing portion 75 is spaced apart from the pressed portion 32b.

[0157] In the first area Am1, which is the area for recording on the medium, it is necessary to accurately determine the position of the line head 40 with good precision. Therefore, cam drive by the first moving part 65 is adopted.

[0158] When the shaft 77 rotates in the rotational direction C2 from the Figure 13 state, the cam 66 also rotates in the rotational direction C2. In the present embodiment, the outer peripheral surface of the cam 66 is formed such that when the cam 66 rotates by 1°, the radius changes by 0.01 mm. That is, when the cam 66 rotates by 1°, the line head 40 moves up or down by 0.01 mm.

[0159] Figure 14 Shows the state where the shaft 77 rotates in the rotational direction C2 from the Figure 13 state and the line head 40 moves to the second recording position in the first area Am1.

[0160] In addition, Figure 15 shows the state where the shaft 77 further rotates in the rotational direction C2 from the Figure 14 state and the line head 40 moves to the third recording position in the first area Am1.

[0161] In this way, in the first area Am1, the first moving part 65 with a small amount of movement of the line head 40 per unit rotation angle of the shaft 77 functions, whereby the line head 40 can be accurately positioned at each recording position.

[0162] It should be noted that when the line head 40 is lowered from the Figure 15 state and positioned at the second recording position or the first recording position, or when positioned at the cover position Hp0, the shaft 77 is rotated in the rotational direction C1.

[0163] Next, Figure 16 and Figure 17 are the states where the shaft 77 further rotates in the rotational direction C2 from the Figure 15 state, Figure 16 and Figure 17 are diagrams of the same state. Figure 16 、 Figure 17 The state shown is the state where the abutting part 32a is placed at the part where the radius Ra of the cam 66 is the largest. When the shaft 77 further rotates in the rotational direction C2 from this state, the abutting part 32a disengages from the cam 66.

[0164] In addition, as shown in Figure 17 this is the state where the rack 71 starts to engage with the pinion 72.

[0165] In this way, when the line head 40 migrates from the first area Am1 to the second area Am2, it transfers from the state of moving through the first moving part 65 to the state of moving through the second moving part 70.

[0166] It should be noted that when transferring from the cam drive based on the first moving part 65 to the rack and pinion drive based on the second moving part 70, as Figure 16 , Figure 17 shown, a state is temporarily formed in which the cam 66 contacts the abutting part 32a, i.e., the line head 40, and the pinion 72 meshes with the rack 71. Thus, even if the abutting part 32a detaches from the cam 66, the line head 40 will not drop due to this.

[0167] Figure 18 The shaft 77 rotates further in the rotational direction C2 from the Figure 16 and Figure 17 state, and the head unit 30 is raised to the position in the +Z direction by the second moving part 70, i.e., the rack and pinion mechanism. This state is the state in which the line head 40 is spaced farthest from the opposing part 45, and becomes the paper jam processing position Hp2 when a paper jam occurs.

[0168] It should be noted that in the present embodiment, the rack and pinion mechanism composed of the rack 71 and the pinion 72 is configured such that when the pinion 72 rotates 1°, the line head 40 rises or falls by approximately 0.26 mm. Therefore, with respect to the amount of movement of the line head 40 per unit rotation angle of the shaft 77, the second moving part 70 is much larger than the first moving part 65.

[0169] It should be noted that in the present embodiment, the impression plate gap when the line head 40 is at the paper jam processing position Hp2 is 30 mm to 40 mm.

[0170] In the above process, even when the line head 40 rises from the first recording position to the paper jam processing position, the shaft 77 is rotated in the rotational direction C2 without switching the rotational direction.

[0171] It should be noted that the lowest position in the moving area of the line head 40 is the cover position Hp0, and the uppermost position is the paper jam processing position Hp2. Similarly, when the line head 40 is raised from the cover position Hp0 to the paper jam processing position Hp2, the shaft 77 is rotated in the rotational direction C2 without switching the rotational direction.

[0172] It should be noted that when the line head 40 descends, it is the opposite of the above. That is, when the line head 40 migrates from the second area Am2 to the first area Am1, the drive is transferred from the rack and pinion drive based on the second moving part 70 to the cam drive based on the first moving part 65. Specifically, when the line head 40 migrates from the second area Am2 to the first area Am1, a state is formed in which the pinion 72 disengages from the rack 71 and the abutting part 32a is placed on the cam 66.

[0173] Further, during the process of lowering the line head 40 from the paper jam processing position Hp2 to the first recording position, the shaft 77 is rotated in the rotation direction C1 without switching the rotation direction. Additionally, during the process of lowering the line head 40 from the paper jam processing position Hp2 to the cover position Hp0, the shaft 77 is similarly rotated in the rotation direction C1 without switching the rotation direction.

[0174] In addition, when shifting from the rack and pinion drive based on the second moving portion 70 to the cam drive based on the first moving portion 65, as Figure 16 、 Figure 17 shown, a state is temporarily formed in which the cam 66 contacts the abutting portion 32a, i.e., the line head 40, and the pinion 72 meshes with the rack 71. Thus, even if the pinion 72 disengages from the rack 71, the line head 40 will not drop as a result.

[0175] Next, the case where the line head 40 is lowered from the first area Am1, i.e., the case of performing the cover operation, will be described. It should be noted that in the case of performing the cover operation, when the baffle 47 provided in the opposing portion 45 (refer to Figure 5 ) is in the shielding position, the baffle 47 is moved from the shielding position to the open position as described above before the cover operation.

[0176] Figure 19 The state where the line head 40 is in the first area Am1, more specifically, in the first recording position, is shown. At a position in the head unit 30 that opposes the upstream support portion 46, a protruding portion 40a that protrudes toward the opposing portion 45 is provided. In this state, a gap Gp is formed between the protruding portion 40a and the upstream support portion 46. It should be noted that although not shown in the figure, the protruding portion 40a is provided at a position deviated from the medium conveyance area in the X-axis direction. Additionally, the protruding portion 40a is provided on both sides of the medium conveyance area in the X-axis direction. The protruding portion 40a is provided on the unit frame 31 as an example.

[0177] In the case of performing the cover operation from this state, the shaft 77 is rotated in the rotation direction C1. As a result, since the radius Ra of the cam 66 at the position where the abutting portion 32a contacts the outer peripheral surface of the cam 66 becomes smaller, the line head 40 drops.

[0178] When the line head 40 drops, as Figure 20 shown, the protruding portion 40a abuts against the upstream support portion 46, and the descent of the line head 40 stops. This state is the state where the head unit 30 is placed on the upstream support portion 46, i.e., the opposing portion 45, by its own weight. The pressing force of the coil spring 54 that presses the upstream support portion 46 upward is set to a magnitude such that the upstream support portion 46 will not be displaced downward when the head unit 30 is placed on the upstream support portion 46 by its own weight.

[0179] It should be noted that the line head 40 being placed on the opposing portion 45 by its own weight means that it is not limited to the method of the line head 40 being placed on the opposing portion 45 only by its own weight, and also includes the method of being placed on the opposing portion 45 while receiving a pressing force in a direction including a vertically downward component from a spring or the like in addition to its own weight. When the head unit 30, that is, the line head 40, is placed on the opposing portion 45 while receiving a pressing force in a direction including a vertically downward component from a spring or the like, the floating of the head unit 30, that is, the line head 40, can be suppressed, and the platen gap is stabilized.

[0180] It should be noted that at the moment when the protruding portion 40a abuts against the upstream support portion 46, since the pressing portion 75 does not abut against the portion to be pressed 32b, even if the shaft 77, that is, the rotating body 74, rotates in the rotation direction C1, there is a period during which the line head 40 maintains a stopped state. This period is the idling period of the head movement motor 101, which will be described in detail later.

[0181] And, when the shaft 77 further rotates in the rotation direction C1 from the Figure 20 state, the pressing portion 75 abuts against the portion to be pressed 32b and presses the portion to be pressed 32b downward. That is, the rod drive based on the third moving portion 73 starts, and thereby, the head unit 30, that is, the line head 40, descends. At this time, the head unit 30 presses the upstream support portion 46 downward against the pressing force of the coil spring 54.

[0182] Figure 21 The state where the line head 40 is in the cover position Hp0 is shown. During the movement of the line head 40 to the cover position Hp0, the head surface 42a of the line head 40 contacts the cover portion 61, and further, the head surface 42a presses the cover portion 61 downward by a specified amount against the pressing force of the cover spring 63. Thereby, the cover portion 61 closely adheres to the head surface 42a.

[0183] When raising the head unit 30, that is, the line head 40, from the Figure 21 state, the shaft 77 is rotated in the rotation direction C2. As a result, since the pressing portion 75 is displaced upward, the line head 40 is restricted in the Z-axis direction position by the pressing portion 75 and rises by the elastic force of the coil spring 54, returning to the Figure 20 state.

[0184] When further rotating the shaft 77 in the rotation direction C2 from the Figure 20 state, the cam drive based on the first moving portion 65 is switched.

[0185] Here, in the Figure 21 , the reference numeral k1 is the gap formed between the cam 66 and the abutting portion 32a. When there is no such gap k1, the state of the cam 66 supporting the line head 40 and the state of the pressing portion 75 pressing the portion to be pressed 32b, that is, the line head 40, are formed simultaneously, and the rotating body 74 may be in a locked state and unable to rotate.

[0186] However, by setting the gap k1, the states of the line head 40 being supported by the cam 66 and the pressing portion 75 pressing down the line head 40 are not formed simultaneously, and the locking of the rotating body 74 can be avoided.

[0187] In addition, in the present embodiment, as described above, the line head 40 includes a rack member 32 in which the pressed portion 32b, the abutting portion 32a, and the rack 71 are formed integrally. Thus, it is easy to determine the relative positional relationship among the pressed portion 32b, the abutting portion 32a, and the rack 71. As a result, a configuration in which the states of the line head 40 being supported by the cam 66 and the pressing portion 75 pressing down the line head 40 are not formed simultaneously can be reliably achieved.

[0188] It should be noted that even if the cam 66 moves away from the abutting portion 32a to form the gap k1, since the line head 40 is supported by the upstream support portion 46, the line head 40 does not drop. However, it is also possible to configure that the cover portion 61 supports the line head 40 instead of the configuration in which the upstream support portion 46 supports the line head 40 in a state where the gap k1 is formed when the cam 66 moves away from the abutting portion 32a.

[0189] As described above, the printer 1 includes: a medium conveyance path Ta for conveying a medium; a line head 40 that can move relative to the medium conveyance path Ta in a direction intersecting the recording surface of the medium; and a moving unit 110 that moves the line head 40.

[0190] The moving area of the line head 40 has a first area Am1 and a second area Am2 that is farther from the medium conveyance path Ta than the first area Am1.

[0191] The moving unit 110 includes a first moving portion 65 that moves the line head 40 in the first area Am1 and a second moving portion 70 that moves the line head 40 in the second area Am2.

[0192] When the line head 40 migrates from the first area Am1 to the second area Am2, it transfers from the state of moving through the first moving portion 65 to the state of moving through the second moving portion 70. In addition, when the line head 40 migrates from the second area Am2 to the first area Am1, it transfers from the state of moving through the second moving portion 70 to the state of moving through the first moving portion 65.

[0193] Moreover, the first moving portion 65 and the second moving portion 70 are driven by a head moving motor 101 that is a common drive source. Thus, compared with a configuration in which the first moving portion 65 and the second moving portion 70 are driven by different drive sources, an increase in the cost of the device can be suppressed, and in addition, miniaturization of the device can be achieved.

[0194] In addition, when the line head 40 migrates from the first area Am1 to the third area Am3, it transfers from the state of moving through the first moving part 65 to the state of moving through the third moving part 73. In addition, when the line head 40 migrates from the third area Am3 to the first area Am1, it transfers from the state of moving through the third moving part 73 to the state of moving through the first moving part 65.

[0195] That is, in the present embodiment, in addition to the first moving part 65 and the second moving part 70, the third moving part 73 is also driven by one head moving motor 101. As a result, an increase in the cost of the device can be suppressed, and in addition, miniaturization of the device can be achieved.

[0196] In addition, in the present embodiment, the first moving part 65 includes a cam 66, which is a cam rotated by the power of the head moving motor 101, and moves the line head 40 by rotating while supporting the line head 40. Thereby, the position of the line head 40 can be finely adjusted at a position close to the medium conveyance path Ta. As a result, the line head 40 can be positioned at an appropriate position corresponding to the thickness of the medium.

[0197] In addition, in the present embodiment, the second moving part 70 includes: a rack 71 provided on the line head 40; and a pinion 72 engaged with the rack 71, and moves the line head 40 by rotating using the power of the head moving motor 101. Thereby, even when the second area Am2 is ensured to be large, the line head 40 can be moved significantly accordingly, which can contribute to the convenience of maintenance work and the like.

[0198] However, the first moving part 65 is not limited to cam drive, and other configurations such as rack and pinion drive can also be adopted. In addition, the second moving part 70 is not limited to rack and pinion drive, and other configurations such as cam drive can also be adopted.

[0199] In addition, in the present embodiment, the cam 66 and the pinion 72 are integrally formed to form a rotating body 74. Thereby, the power can be easily transmitted from the head moving motor 101 to the first moving part 65 and the second moving part 70. In addition, since there is no need to separately transmit power from the head moving motor 101 to the first moving part 65 and the second moving part 70, the number of components can be reduced. As a result, an increase in the cost of the device can be suppressed, and in addition, miniaturization of the device can be achieved. However, the cam 66 and the pinion 72 can also be separately formed.

[0200] Moreover, in the present embodiment, a pressing portion 75 is provided on the rotating body 74. Thereby, power can be easily transmitted from the head moving motor 101 to the first moving portion 65, the second moving portion 70, and the third moving portion 73. In addition, since there is no need to separately transmit power from the head moving motor 101 to the first moving portion 65, the second moving portion 70, and the third moving portion 73, the number of components can be reduced. As a result, an increase in the cost of the apparatus can be suppressed, and the apparatus can be miniaturized.

[0201] However, the pressing portion 75 may be configured independently of the rotating body 74.

[0202] In addition, in the present embodiment, the pinion 72 has a first phase region Ak1 in which a part of the teeth is missing. When the first phase region Ak1 faces the rack 71, the cam 66 supports the line head 40. Thus, the following effects can be obtained.

[0203] That is, when the first moving portion 65 moves the line head 40, if the second moving portion 70 also tries to move the line head 40, the position adjustment of the line head 40 based on the first moving portion 65 may be disturbed. According to this embodiment, the pinion 72 has a first phase region Ak1 in which a part of the teeth is missing. When the first phase region Ak1 faces the rack 71, the cam 66 supports the line head 40. Therefore, it is possible to suppress the second moving portion 70 from having an adverse effect when the first moving portion 65 moves the line head 40.

[0204] In addition, in the present embodiment, when transferring from the movement of the line head 40 based on the cam 66 to the movement of the line head 40 based on the pinion 72, and when transferring from the movement of the line head 40 based on the pinion 72 to the movement of the line head 40 based on the cam 66, a state where the cam 66 is in contact with the line head 40 and the pinion 72 is engaged with the rack 71 is temporarily formed. As a result, a state where the line head 40 is not supported by either the cam 66 or the pinion 72 does not occur. As a result, it is possible to avoid the occurrence of defects such as the line head 40 falling and the line head 40 being defective due to impact. It should be noted that the state where the cam 66 is in contact with the line head 40 and the pinion 72 is engaged with the rack 71 deviates from the above-described first recording position, second recording position, and third recording position.

[0205] In addition, when the cam 66 and the pinion 72 are separately configured, it may not be possible to temporarily form a state where the cam 66 is in contact with the line head 40 and the pinion 72 is engaged with the rack 71 due to component tolerances or assembly errors. However, in the present embodiment, since the cam 66 and the pinion 72 are integrally formed, the occurrence of the above-described defects can be suppressed.

[0206] In addition, in the present embodiment, the line head 40 includes a rack member 32 integrally formed with an abutting portion 32a that abuts against the cam 66 and a rack 71. Thereby, it is easy to determine the positional relationship between the abutting portion 32a and the rack 71.

[0207] Here, assuming that the abutting portion 32a and the rack 71 are separately formed, due to component tolerances or assembly errors, etc., it may not be possible to temporarily form a state in which the cam 66 contacts the line head 40 and the pinion 72 meshes with the rack 71. However, since the abutting portion 32a and the rack 71 are integrally formed, the positional relationship between the abutting portion 32a and the rack 71 is easy to determine, so that the occurrence of the above-mentioned defects can be suppressed.

[0208] In addition, in the present embodiment, the printer 1 includes a guide frame 33 that guides the line head 40 in the Z-axis direction, that is, the moving direction of the line head 40, and a shaft 77 that is the rotation axis of the rotating body 74. The shaft 77 is rotatably supported by the guide frame 33. Thereby, it is easy to determine the positional relationship between the rotating body 74 and the rack member 32, appropriately determine the positional relationship between the rack 71 and the pinion 72, and also appropriately determine the positional relationship between the abutting portion 32a and the cam 66. Therefore, the line head 40 can be appropriately moved by the first moving portion 65 and the second moving portion 70.

[0209] In addition, in the present embodiment, the head unit 30 includes a line head 40. The line head 40 includes a plurality of nozzles 44 that eject ink, which is an example of a liquid, along the medium width direction, and is a liquid ejection head that ejects ink from the nozzles 44 without moving in the medium width direction. A cover portion 61 is provided at a position facing the line head 40 to cover the head surface 42a, which is the liquid ejection surface of the line head 40.

[0210] The cover portion 61 can be displaced in a direction of advancing and retreating with respect to the line head 40, and the cover portion 61 is pressed against the line head 40 by a cover spring 63, which is an example of a pressing member.

[0211] The line head 40 can further move from the first region Am1 to a cover position Hp0 where the head surface 42a is covered by the cover portion 61.

[0212] A pressing portion 75 is provided on the rotating body 74. After the contact between the abutting portion 32a of the line head 40 and the cam 66 is released, the pressing portion 75 presses the line head 40 toward the cover portion 61 as the rotating body 74 rotates. Thereby, the following effects can be obtained.

[0213] In order to make the head surface 42a of the line head 40 be in a state reliably covered by the covering portion 61, it is necessary to press the head surface 42a against the pressing force of the cover spring 63 to the cover portion 61. The first moving portion 65 moves the line head 40 in the first region Am1, and in addition, the line head 40 is moved by the rotation of the cam 66, and the head surface 42a cannot be pressed to the cover portion 61.

[0214] However, a pressing portion 75 is provided on the rotating body 74. After the contact between the contact portion 32a of the line head 40 that abuts against the cam 66 and the cam 66 is released, the pressing portion 75 presses the line head 40 downward toward the cover portion 61 as the rotating body 74 rotates. Thereby, the head surface 42a can be reliably pressed to the cover portion 61, and the head surface 42a can be reliably covered by the cover portion 61.

[0215] In addition, since the pressing portion 75 is provided on the rotating body 74, there is no need for an additional power source for reliably pressing the head surface 42a to the cover portion 61. As a result, an increase in the cost of the device can be suppressed, and in addition, miniaturization of the device can be achieved.

[0216] Position detection of the line head

[0217] Next, the position detection in the moving direction of the line head 40 will be described. Hereinafter, when simply referred to as the moving direction, it means the moving direction (Z-axis direction) of the line head 40.

[0218] First, with reference to Figure 4 The control unit 100 will be further described. It should be noted that the control unit 100 controls the entire printer 1, but the configuration unrelated to the movement of the line head 40 is omitted in Figure 4 .

[0219] The control unit 100 performs various controls including the recording control of the printer 1. The control unit 100 includes one or more processors that operate according to a computer program, in other words, software. The processor includes a CPU and memories such as a RAM and a ROM, and the memories store program codes or instructions configured to cause the CPU to execute processing. The control unit 100 is not limited to a controller that performs software processing. For example, the control unit 100 may also include a dedicated hardware circuit that performs hardware processing on at least a part of the processing it executes, such as an application-specific integrated circuit (ASIC).

[0220] The head movement motor 101 is electrically connected to the control unit 100 as an output system. In the present embodiment, the head movement motor 101 is a DC motor and is subjected to PWM (Pulse Width Modulation) control by the control unit 100.

[0221] In addition, the control unit 100 is electrically connected to components such as the operation unit 115, the rotary ENC 103, and the linear ENC 107 as an input system. The operation unit 115 is a part that accepts the power on / off of the printer 1, various settings, and recording execution. For example, it can be composed of a touch panel that realizes a user interface through the control of the control unit 100.

[0222] The control unit 100 includes an arithmetic unit 120, a motor control unit 121, a motor driver 122, a volatile memory 123, and a non-volatile memory 124 as an example of a storage unit.

[0223] The arithmetic unit 120 performs various operations required for operating the printer 1. For example, the arithmetic unit 120 performs various operations such as setting values required for executing the program 125 stored in the non-volatile memory 124. The volatile memory 123 is used as a temporary data storage area.

[0224] The motor control unit 121 controls the head movement motor 101 via the motor driver 122 by outputting a current command value, such as a duty ratio signal required for PWM (Pulse Width Modulation) control, to the motor driver 122. The motor driver 122 includes a D / A converter and controls the current supplied to the head movement motor 101 by performing PWM control based on the duty ratio signal.

[0225] In the present embodiment, the motor control unit 121 performs PID control on the head movement motor 101. The motor control unit 121 calculates the target rotational speed by multiplying the position deviation between the target rotational position of the head movement motor 101 and the actual rotational position obtained from the output signal of the rotary ENC 103 by the gain Kp. Then, based on the speed deviation between the target rotational speed and the actual rotational speed obtained from the output of the rotary ENC 103, the motor control unit 121 performs operations on the proportional component, integral component, and differential component using the proportional element, integral element, and differential element, and sends a duty ratio signal to the motor driver 122 based on the sum of these operation results.

[0226] It should be noted that the motor control unit 121 can also control the head movement motor 101 based on the output signal of the linear ENC instead of the output signal of the rotary ENC 103.

[0227] The arithmetic unit 120 detects the edges of the output pulses of the rotary ENC 103, counts their number, and calculates the rotational position of the head movement motor 101 based on the count value. The arithmetic unit 120 differentiates the forward rotation and reverse rotation of the head movement motor 101 according to the comparison process of the two pulse signals output from the rotary ENC 103. Then, the arithmetic unit 120 performs a counting process to increment and decrement the rotational position of the head movement motor 101 corresponding to the forward rotation and reverse rotation when one edge is detected.

[0228] Figure 22 , Figure 23 The "rotary ENC position" shown in the figure has the rotational position of the head movement motor 101 obtained by the above counting process on the vertical axis, with the upward direction being the increment direction, i.e., the upward direction of the line head 40, and the downward direction being the decrement direction, i.e., the downward direction of the line head 40.

[0229] It should be noted that the rotary ENC 103 outputs two pulse signals, pulse ENC-A and pulse ENC-B. In either the case of the forward rotation or reverse rotation of the head movement motor 101, the phases of pulse ENC-A and pulse ENC-B are offset by 90 degrees. When the head movement motor 101 is in forward rotation, the phase of pulse ENC-A is 90 degrees ahead of the phase of pulse ENC-B. On the other hand, when the head movement motor 101 is in reverse rotation, the phase of pulse ENC-A is 90 degrees behind the phase of pulse ENC-B. The time for one cycle of each pulse is equal to the time for the head movement motor 101 to rotate by the amount of the interval between the slits of the rotary scale 104. Thus, the arithmetic unit 120 can detect the rotational speed of the head movement motor 101. Figure 22 , Figure 23 The "rotary ENC speed" shown in the figure corresponds to the above rotational speed.

[0230] It should be noted that the arithmetic unit 120 can calculate the movement amount of the line head 40 based on the rotational amount of the head movement motor 101 and the reduction ratio of the above reduction mechanism 76. In addition, if the arithmetic unit 120 detects the time for one cycle of each pulse, it can calculate the movement speed of the line head 40 based on the reduction ratio of the above reduction mechanism 76. However, in the case where the signal change of the linear ENC 107 is not detected, that is, in the case where the linear ENC position described later does not change, even if the position of the rotary ENC 103 changes, the line head 40 does not move.

[0231] In addition, the arithmetic unit 120 can also detect the edges of the output pulses of the linear ENC 107, count the number thereof, and calculate the position of the line head 40 in the moving direction based on the count value. The arithmetic unit 120 distinguishes the rising and falling of the line head 40 according to the comparison process of the two pulse signals output from the linear ENC 107. Then, the arithmetic unit 120 performs a counting process to increment and decrement the position of the line head 40 correspondingly when one edge is detected, corresponding to the rising and falling.

[0232] Figure 22 , Figure 23 The "linear ENC position" shown in the figure has a vertical axis representing the position obtained through the above counting process, corresponding to the position of the line head 40 in the moving direction. The upward direction of the linear ENC position becomes the increment direction, i.e., the rising direction of the line head 40, and the downward direction becomes the decrement direction, i.e., the falling direction of the line head 40.

[0233] It should be noted that the linear ENC 107 outputs two pulse signals, namely pulse ENC-A and pulse ENC-B. In any case of the rising and falling of the line head 40, the phase of pulse ENC-A is shifted 90 degrees from the phase of pulse ENC-B. When the line head 40 is rising, the phase of pulse ENC-A is 90 degrees ahead of the phase of pulse ENC-B. On the other hand, when the line head 40 is falling, the phase of pulse ENC-A is 90 degrees behind the phase of pulse ENC-B. The time of one cycle of each pulse is equal to the time for the line head 40 to move by the amount of the slit interval of the linear scale 108.

[0234] If the arithmetic unit 120 counts the number of pulse signals, it can detect the moving amount of the line head 40. In addition, if the arithmetic unit 120 detects the time of one cycle of each pulse, it can calculate the moving speed of the line head 40. Figure 22 , Figure 23 The "linear ENC speed" shown in the figure corresponds to the moving speed.

[0235] Hereinafter, an overview of the origin detection method of the line head 40 will be described.

[0236] As an example, when the line head 40 descends from the Figure 19 shown recording position Hp1, before the protruding portion 40a provided on the line head 40 abuts against the upstream support portion 46, signal changes occur in both the rotary ENC 103 and the linear ENC 107. This is shown in the Figure 22 shown rotary ENC position and linear ENC position during the cam drive.

[0237] When the protrusion 40a provided on the line head 40 abuts against the upstream support portion 46, the descent of the line head 40 temporarily stops, and thus the signal change of the linear ENC 107 disappears. This is shown in Figure 22 the linear ENC position during the idling of the motor as shown. However, since the head movement motor 101 continues to rotate, as shown in Figure 22 the rotational ENC position during the idling of the motor, the signal change of the rotational ENC 103 continues to be generated.

[0238] The control unit 100 can utilize this property to set the origin position of the line head 40. That is, the control unit 100 sets the origin position of the line head 40 based on the position of the line head 40 when the signal change of the linear ENC 107 disappears in a state where there is a signal change of the rotational ENC 103 when the line head 40 descends toward the opposing portion 45.

[0239] In Figure 22 the position Pm0 is the rotational ENC position at the moment when the signal change of the linear ENC 107 disappears, that is, the origin position of the rotational ENC 103, and the position Pn0 is the linear ENC position at the moment when the signal change of the linear ENC 107 disappears, that is, the origin position of the linear ENC 107.

[0240] The position of the line head 40 in the moving direction can be grasped based on the origin position of the rotational ENC 103 or based on the origin position of the linear ENC 107. In any case, the distance from the origin position to the boundary of each region can be stored as a known value in the non-volatile memory 124. As a result, the control unit 100 can grasp the current position of the line head 40.

[0241] It should be noted that in the present embodiment, regarding the encoder resolution of the unit movement amount of the line head 40 by the speed reduction mechanism 76, the rotational ENC 103 is higher than the linear ENC 107. Therefore, in order to ensure the stop position accuracy of the line head 40, it is preferable to perform basic speed control of the head movement motor 101 based on the output signal of the rotational ENC 103.

[0242] It should be noted that when the line head 40 is raised, the origin position of the line head 40 can also be set. For example, when the line head 40 is raised from the cover position Hp0, before the upstream support portion 46 rises to the upper limit position, both the rotational ENC 103 and the linear ENC 107 generate signal changes. This is shown in Figure 23 the rotational ENC position and the linear ENC position during the rod drive as shown.

[0243] When the upstream support portion 46 rises to the upper limit position and the pressing portion 75 moves upward away from the pressed portion 32b, the ascent of the line head 40 temporarily stops, and thus the signal change of the linear ENC 107 disappears. This is manifested in Figure 23 the linear ENC position during the motor idling period as shown. However, since the head movement motor 101 continues to rotate, as shown in Figure 23 the rotational ENC position during the motor idling period, the signal change of the rotational ENC 103 continues to occur. And when the cam 66 abuts against the abutting portion 32a and raises the line head 40, the protruding portion 40a moves away from the upstream support portion 46, and the line head 40 rises. This is manifested in the linear ENC position when migrating from the Figure 23 shown motor idling period to the cam driving period.

[0244] The control unit 100 can utilize this property to set the origin position of the line head 40. That is, the control unit 100 sets the origin position of the line head 40 based on the position of the line head 40 when the signal change of the linear ENC 107 occurs in a state where there is a signal change of the rotational ENC 103.

[0245] In Figure 23 , the position Pm0 is the rotational ENC position at the moment when the signal change of the linear ENC 107 disappears, that is, the origin position of the rotational ENC 103, and the position Pn0 is the linear ENC position at the moment when the signal change of the linear ENC 107 disappears, that is, the origin position of the linear ENC 107.

[0246] Hereinafter, with reference to Figure 24 the processing performed by the control unit 100 will be further described.

[0247] The control unit 100 sets the origin position of the line head 40 as described above at a prescribed timing (step S101). This origin position setting can be performed when the power of the printer 1 is turned on, when a predetermined time has elapsed since the last origin position setting, and so on.

[0248] Next, the control unit 100 sets the rotational ENC position as shown in step S102. Note that the position in step S102 refers to the rotational ENC position, but it can also be the linear ENC position.

[0249] Thereby, the rotational ENC position in the lever drive region is set to "position < origin - dx1". The distance dx1 is the distance from the origin position to the lever drive region.

[0250] In addition, the rotational ENC position in the cam drive region is set to "origin ≤ position < origin + dx2". The distance dx2 is the distance from the origin position to the rack and pinion drive region.

[0251] In addition, the rotational ENC position in the rack and pinion drive area is set to "origin + dx2 ≤ position". The values dx1 and dx2 are stored in the non-volatile memory 124 as part of the control parameter 126 (see Figure 4 ).

[0252] It should be noted that the lengths of the rod drive area and the rack and pinion drive area are also stored in the non-volatile memory 124 as part of the control parameter 126 (refer to Figure 4 ).

[0253] Next, when the control unit 100 moves the line head 40 (yes in step S103), it determines whether the printing mode is the normal mode (step S104). The printing mode can be selected by the user via the operation unit 115 as either the normal mode or the speed priority mode.

[0254] In the case of the normal mode, the control unit 100 temporarily stops the line head 40 in front of the area boundary and selects control parameters in each area (step S105). In the case of the speed priority mode, the control unit 100 continuously drives without stopping the line head 40 at the area boundary and selects control parameters in each area (step S106).

[0255] The control parameters for each area are stored in the non-volatile memory 124 as part of the control parameter 126 (refer to Figure 4 ). The control parameters for each area include the torque limit value of the head movement motor 101. The torque limit value is, as an example, the limit value of the duty ratio signal sent to the motor driver 122, thereby limiting the drive current value of the head movement motor 101. The torque limit value for each area is stored in the non-volatile memory 124 as part of the control parameter 126 (refer to Figure 4 ). By setting the torque limit value, it is possible to suppress excessive load on the drive mechanism in the event of an abnormality.

[0256] Figure 27 The head movement speed, motor rotation speed, motor drive load, and torque limit value for each area when the line head 40 rises and falls are shown. When the line head 40 descends, the head movement speed is the lowest in the first area Am1, i.e., in the case of cam drive, the highest in the second area Am2, i.e., in the case of rack and pinion drive, and intermediate in the third area Am3, i.e., in the case of rod drive. In addition, when the line head 40 descends, the motor rotation speed is speed 2 in each area. However, for example, in order to mitigate the impact when the line head 40 contacts an obstacle in the second area Am2 or the third area Am3, a speed lower than speed 2 can also be set.

[0257] In addition, when the line head 40 descends, the driving load of the head moving motor 101 is the smallest in the first area Am1 and the second area Am2, and is larger than that in the first area Am1 and the second area Am2 in the third area Am3. Therefore, when the line head 40 descends, the torque limit value is the smallest in the first area Am1 and the second area Am2, and is larger than that in the first area Am1 and the second area Am2 in the third area Am3. In the third area Am3, the pressing portion 75 presses down the line head 40 in order to counteract the spring force of the coil spring 54 (refer to Figure 20 ), or the lid spring 63 (refer to Figure 20 ). This is shown in the motor duty ratio of the rod driving area shown in Figure 22 . When the line head 40 descends, in the third area Am3, the head moving motor 101 first receives a load from the coil spring 54, and then receives loads from both the coil spring 54 and the lid spring 63. Therefore, as the line head 40 descends, the motor duty ratio increases. Therefore, the torque limit value in the third area Am3 is the largest.

[0258] Next, when the line head 40 ascends, the head moving speed is the lowest in the first area Am1 where the cam drives, the highest in the second area Am2 where the rack and pinion drive, and is in the middle in the third area Am3 where the rod drives. In addition, when the line head 40 ascends, the motor rotation speed is speed 1 in each area. However, for example, in order to mitigate the impact when the line head 40 abuts against an obstacle in the second area Am2 or the third area Am3, a speed lower than speed 1 may be set. It should be noted that speed 1 may be equal to speed 2, higher than speed 2, or lower than speed 2.

[0259] In addition, when the line head 40 ascends, the driving load of the head moving motor 101 is the smallest in the third area Am3 and the first area Am1, and is larger than that in the first area Am1 and the third area Am3 in the second area Am2. However, when the line head 40 ascends, the torque limit value is the largest in the third area Am3. This is because when the worm and worm gear mechanism meshes when the head descends, when the head ascends, a motor driving load larger than the motor driving load when the head descends may be applied. It should be noted that the torque limit value is the smallest in the first area Am1, and is larger than that in the first area Am1 in the second area Am2.

[0260] Next, with reference to Figure 25 , a process of detecting the origin of the line head 40 by raising the line head 40 from the state where the line head 40 is placed on the upstream support portion 46 via the protruding portion 40a will be described.

[0261] With the line head 40 placed on the upstream support portion 46 via the protruding portion 40a, the control unit 100 starts driving the head movement motor 101 to raise the line head 40 (step S201). Next, when a signal change in the linear ENC 107 occurs (Yes in step S202), when the number of edges of the output pulse of the linear ENC 107 is Ce1, the origin position based on the linear ENC 107 is set in front of the Ce1 edge (step S203). An example of the number of edges Ce1 is 1.

[0262] Next, the control unit 100 sets the origin position based on the rotary ENC 103 in front of the Ce1×(Rs1 / Rs2) edge (step S204). Here, Rs1 is the resolution of the rotary ENC 103, specifically, the number of edges of the output pulse of the rotary ENC 103 with respect to the unit movement amount of the line head 40. In addition, Rs2 is the resolution of the linear ENC 107, specifically, the number of edges of the output pulse of the linear ENC 107 with respect to the unit movement amount of the line head 40.

[0263] By setting the origin position of the line head 40 in this way, the origin position of the line head 40 can be accurately set.

[0264] Next, refer to Figure 26 A process of performing origin detection of the line head 40 by lowering the line head 40 from a state where the protruding portion 40a of the line head 40 is spaced apart from the upstream support portion 46 will be described.

[0265] The control unit 100 starts driving the head movement motor 101 to lower the line head 40 (step S301). Next, when the signal change in the linear ENC 107 disappears (Yes in step S302), if there is a signal change in the rotary ENC 103 (Yes in step S303), the origin position based on the linear ENC 107 is set to the linear ENC position at the moment when the signal change in the linear ENC 107 disappears (step S304). In addition, the control unit 100 sets the origin position based on the rotary ENC 103 to the rotary ENC position at the moment when the signal change in the linear ENC 107 disappears (step S305). By setting the origin position of the line head 40 in this way, the origin position of the line head 40 can be accurately set.

[0266] Figure 24 The origin position setting in step S101 of Figure 25 shown can adopt Figure 26 the processing shown, or can also adopt

[0267] Note that, when the signal change of the linear ENC107 disappears (Yes in step S302), and when the signal change of the rotary ENC103 also disappears within the moving area of the line head 40 although it is within the moving area of the line head 40 (No in step S303), it is determined that the head unit 30 is in contact with some obstacle, and the head movement motor 101 is stopped (step S306), and error processing is performed. As an example of the error processing, the operation unit 115 is caused to display an alarm indicating that an abnormality has occurred.

[0268] Thereby, it is possible to suppress excessive load on the line head 40 or the moving unit 110, and it is possible to suppress breakage of the line head 40 or the moving unit 110.

[0269] Note that there is play such as backlash of gears in the moving unit 110. Therefore, particularly when the line head 40 is lowered and then the origin position of the line head 40 is set and the line head 40 is raised, and when the line head 40 is raised based on the origin position of the rotary ENC103, it is preferable to set the target stop position of the head movement motor 101 in consideration of the amount of the backlash.

[0270] Next, Figure 28 The processing when the power supply of the printer 1 is not turned off in the normal order will be described. When the power supply of the printer 1 is turned off in the normal order, specifically, when the user presses a power button (not shown) and the power supply is turned off, the line head 40 moves to the cover position. Therefore, in this case, when the power supply of the printer 1 is turned on, the control unit 100 can determine that the line head 40 is in the cover position. However, when the power supply of the printer 1 is not turned off in the normal order, for example, when the power cord is pulled out while the power supply is on, then when the power supply of the printer 1 is turned on later, the control unit 100 cannot grasp the accurate current position of the line head 40. Therefore, in this case, an exception process for grasping the current position of the line head 40 is required.

[0271] Note that the position of the line head 40 can also be grasped by abutting the line head 40 against one end or the other end of the moving area and detecting an increase in the drive current value of the head movement motor 101 at this time. However, with this method, it is possible to cause excessive surface pressure between the worm wheel 83 (refer to Figure 9 ), which constitutes the worm and worm wheel mechanism, and the cylindrical worm 84 (refer to Figure 9 ), resulting in locking, so it is not preferable.

[0272] Note that, when the power supply of the printer 1 is turned off in the normal order, it is possible to save a power supply flag indicating this to the non-volatile memory 124 (refer to Figure 4)(to determine whether the power supply of the printer 1 has been turned off in the normal order. For example, when the power supply of the printer 1 has been turned off in the normal order, the control unit 100 saves "1" as the above power supply flag to the non-volatile memory 124. Then, when the power supply of the printer 1 is turned on, the control unit 100 reads the above power supply flag. If it is "1", the origin position setting is performed in the normal order ( Figure 24 step S101). Then, at this time, the above power supply flag is reset to "0".

[0273] In addition, when the power supply of the printer 1 is turned on, the control unit 100 reads the above power supply flag. If it is "0", the Figure 28 exception handling shown is performed, considering that the power supply of the printer 1 has not been turned off in the normal order.

[0274] In Figure 28 , when the power supply of the printer 1 is turned on, the control unit 100 determines whether the power-on is started from a normal power-off (step S401). If the power-on is started from a normal power-off (Yes in step S401), the normal origin position setting is performed (step S405). It should be noted that the processing of step S405 is the same as the Figure 24 step S101.

[0275] When the power-on of the printer 1 is not started from a normal power-off (No in step S401), the control unit 100 drives the head movement motor 101 a specified amount in the direction opposite to the previous driving direction (step S402).

[0276] Here, the previous driving direction refers to the driving direction when the control unit 100 drove the head movement motor 101 last time. Whenever the head movement motor 101 is driven, the control unit 100 saves a direction flag indicating the rotation direction to the non-volatile memory 124 (refer to Figure 4 ). By reading the above direction flag, the control unit 100 can grasp the rotation direction when the head movement motor 101 was driven last time.

[0277] In addition, preferably, the "specified amount" in step S402 is as small as possible within the range where the linear ENC speed can be detected. For example, when the above "specified amount" is converted to the movement amount of the line head 40, it is preferably 5.0 mm or less, and more preferably 3.0 mm or less. The above "specified amount" is saved to the non-volatile memory 124 as a part of the control parameter 126 (refer to Figure 4 ). In this way, by setting the above "specified amount" to the minimum, it is possible to suppress the locking of the worm and worm gear mechanism caused by the line head 40 coming into contact with some obstacles when the line head 40 moves.

[0278] Next, the control unit 100 determines which area the line head 40 is currently in based on the linear ENC speed (step S403). As described with reference to Figure 27 , the moving speed of the line head 40, that is, the linear ENC speed, is different in each of the first area Am1, the second area Am2, and the third area Am3. That is, the linear ENC speed when the head moving motor 101 rotates at a prescribed rotational speed is different in each area and can be obtained as a known value. Therefore, the control unit 100 can determine which of the areas the line head 40 is in based on the linear ENC speed. Additionally, of course, if the linear ENC speed is zero when the head moving motor 101 rotates at a prescribed rotational speed, it can be determined that the line head 40 is in the Figure 22 , Figure 23 motor idling area. The moving speed of the line head 40 in each area when the head moving motor 101 rotates at a prescribed rotational speed is stored in the non-volatile memory 124 as a part of the control parameter 126 (refer to Figure 4 ). Of course, the moving speed is a value with a width considering errors.

[0279] If it is possible to determine which area the line head 40 is in, it can be determined that in order to set the origin position, it is only necessary to move the line head 40 in a certain direction. Therefore, the control unit 100 sets the origin position based on which area the line head 40 is in (step S404). For example, if the line head 40 is in the second area Am2 or the first area Am1, the origin position can be set by lowering the line head 40. Additionally, if the line head 40 is in the third area Am3 or the motor idling area, the origin position can be set by raising the line head 40. The origin position setting based on the raising of the line head 40 is the Figure 25 shown process, and the origin position setting based on the lowering of the line head 40 is the Figure 26 shown process.

[0280] It should be noted that when the linear ENC speed is zero when the head moving motor 101 rotates at a prescribed rotational speed, the case where the line head 40 is in the motor idling area and the case where the line head 40 abuts against some part and cannot move can be considered. However, in step S402, the head moving motor 101 is driven in the direction opposite to the previous driving direction. Therefore, at least the state where the line head 40 cannot move because it abuts against one end or the other end of the moving area can be avoided.

[0281] As described above, even when the power supply of the printer 1 is not turned off in the normal order, the current position of the line head 40 can be grasped based on the detection information of the rotary ENC 103 and the linear ENC 107. Additionally, at this time, the occurrence of the locking of the above-described worm gear mechanism can be suppressed.

[0282] It should be noted that in the above-described embodiment, the control unit 100 determines which area the line head 40 is currently in based on the linear ENC speed. However, the motor drive load, specifically the motor drive current value, may be used instead of the linear ENC speed. This is because the motor drive load, that is, the motor drive current value, is different in each area.

[0283] It should be noted that if the baffle 47 (refer to Figure 5 ) is closed, the line head 40 is in the first area Am1 or the second area Am2. Therefore, in the case of having a sensor for detecting the position of the baffle 47, the position of the line head 40 can also be grasped with reference to the position of the baffle 47.

[0284] In addition, in the case of having a sensor for detecting that the cover unit 60 is in the lowered position, the position of the line head 40 can also be grasped with reference to the state of this sensor. For example, if the cover unit 60 is not in the lowered position, the line head 40 is lowered. Thus, in the case of detecting the lowered position of the cover unit 60, it can be determined that the line head 40 is in the cover position.

[0285] Hereinafter, the operation and effect of the printer 1 configured as described above will be described. First, as described above, the moving direction of the line head 40 includes a vertical direction component. The position detection unit for detecting the position of the line head 40 relative to the medium conveyance path Ta is the linear ENC 107, and this linear ENC 107 includes a linear scale 108 provided along the moving direction of the line head 40 and a first detection unit 109 for detecting the linear scale 108 provided in the detection unit of the line head 40.

[0286] The moving unit 110 that receives the power of the head moving motor 101 to move the line head 40 has the following configuration: when the line head 40 is lowered toward the opposing portion 45, after the line head 40 is placed on the opposing portion 45 by its own weight, the head moving motor 101 is allowed to idle. The idling of this head moving motor 101 corresponds to Figure 22 , Figure 23 the rotation of the head moving motor 101 in the motor idling area shown. That is, the idling of the head moving motor 101 means a state where the rotation of the head moving motor 101 is not converted into the movement of the line head 40 and a state where the head moving motor 101 does not receive a load from the line head 40.

[0287] Then, the control unit 100 is based on the change in the detection signal of the linear ENC 107 when the line head 40 is placed on the opposing portion 45 when the line head 40 is lowered ( Figure 22 the linear ENC position Pn0), or the change in the detection signal of the linear ENC 107 when the line head 40 rises from the state of being placed on the opposing portion 45 ( Figure 23The linear ENC position Pn0) to grasp the position of the line head 40 in the moving direction.

[0288] Accordingly, the position of the line head 40 relative to the opposing portion 45 can be appropriately grasped, and thus the impression plate gap can be appropriately set. In addition, the line head 40 can be appropriately positioned at the cover position Hp0 or the paper jam processing position Hp2.

[0289] Moreover, since the impression plate gap can be set with good accuracy, adjustment in the device assembly process is not required, and the assembly time can be shortened. In addition, even if the components are deformed from the assembled state due to the impact during device transportation, it is easy to obtain the same impression plate gap as the target.

[0290] In addition, even if components such as gears constituting the moving unit 110 are worn due to aging, it is difficult for them to affect the impression plate gap.

[0291] In addition, since the moving unit 110 has the following configuration: when the line head 40 is lowered toward the opposing portion 45, after the line head 40 is placed on the opposing portion 45 by its own weight, the head movement motor 101 is allowed to idle, the following effects can be obtained.

[0292] For example, in the case of a configuration in which the position of the line head 40 in the moving direction is grasped by detecting an increase in the drive current value of the head movement motor 101 when the line head 40 abuts against the opposing portion 45, applying a load to the moving unit 110 may cause damage to the components. In addition, it is sometimes difficult to appropriately set the threshold value of the drive current value. In addition, when a worm gear mechanism (refer to Figure 9 ) is included in the moving unit 110 as in the present embodiment, excessive surface pressure may be generated between the worm wheel 83 and the cylindrical worm 84 and locking may occur. However, the moving unit 110 has the following configuration: when the line head 40 is lowered toward the opposing portion 45, after the line head 40 is placed on the opposing portion 45 by its own weight, the head movement motor 101 is allowed to idle. Accordingly, the occurrence of the above-mentioned defects can be suppressed.

[0293] In addition, in the present embodiment, a rotation ENC 103 serving as a rotation detection unit for detecting the rotation of the head movement motor 101 is provided. Then, the control unit 100 grasps the position of the line head 40 in the moving direction based on the detection signal of the linear ENC 107 and the detection signal of the rotation ENC 103. Accordingly, the position of the line head 40 in the moving direction can be grasped with good accuracy.

[0294] In addition, in the present embodiment, the rotation detection unit is a rotation ENC103 including a rotation scale 104 provided on the motor output shaft of the head movement motor 101 and a second detection unit 105 that detects the rotation scale 104. Thus, the rotation of the head movement motor 101 can be detected with good accuracy.

[0295] In addition, the moving unit 110 includes a cylindrical worm 84 driven by the head movement motor 101 and a worm wheel 83 that meshes with the cylindrical worm 84 and rotates as the cylindrical worm 84 rotates. In such a configuration, as described above, locking may occur when excessive surface pressure is generated between the worm wheel 83 and the cylindrical worm 84. However, as described above, when grasping the position of the line head 40 relative to the opposing portion 45, an excessive load is not applied to the moving unit 110, so the occurrence of the above locking can be suppressed.

[0296] Moreover, through the worm gear mechanism, the reduction ratio when transmitting power from the head movement motor 101 to the line head 40 can be increased. As a result, the resolution of the rotation ENC103 can be made greater than the resolution of the linear ENC107, and the line head 40 can be accurately positioned relative to the opposing portion 45.

[0297] In addition, the control unit 100 is based on the position of the line head 40 at the moment when the signal change of the linear ENC107 disappears during the rotation of the head movement motor 101 when the line head 40 is lowered toward the opposing portion 45 ( Figure 22 the linear ENC position Pn0), or the position of the line head 40 at the moment when the signal change of the linear ENC107 occurs during the rotation of the head movement motor 101 when the line head 40 is raised from the state of being placed on the opposing portion 45 ( Figure 23 the linear ENC position Pn0), to set the origin position of the line head 40 in the moving direction.

[0298] In other words, the control unit 100 is based on the position of the line head 40 at the moment when the signal change of the linear ENC107 disappears in a state where there is a signal change of the rotation ENC103 when the line head 40 is lowered toward the opposing portion 45 ( Figure 22 the linear ENC position Pn0), or the position of the line head 40 at the moment when the signal change of the linear ENC107 occurs in a state where there is a signal change of the rotation ENC103 when the line head 40 is raised from the state of being placed on the opposing portion 45 ( Figure 23 the linear ENC position Pn0), to set the origin position of the line head 40 in the moving direction.

[0299] In addition, the control method implemented by the control unit 100 includes the following steps: based on the position of the line head 40 when the signal change of the rotary ENC 103 exists and the signal change of the linear ENC 107 disappears when the line head 40 descends toward the opposing part 45, or based on the position of the line head 40 when the signal change of the linear ENC 107 occurs when the line head 40 rises from the state of being placed on the opposing part 45 in a state where there is a signal change of the rotary ENC 103, the origin position of the line head 40 in the moving direction is set.

[0300] Thereby, the origin in the moving direction of the line head 40 can be appropriately set using the signal change of the linear ENC 107. As a result, the positioning accuracy of the line head 40 is improved.

[0301] In addition, the line head 40 includes a protruding part 40a that protrudes toward the opposing part 45. By the contact of the protruding part 40a with the opposing part 45, the line head 40 is placed on the opposing part 45 by its own weight. Thereby, contact between the part for recording on the medium in the line head 40, specifically the head chip 43 (refer to Figure 2 ) and the opposing part 45 can be avoided. As a result, damage to the head chip 43 can be suppressed, and in addition, the opposing part 45 can be prevented from being soiled.

[0302] In addition, by providing a plurality of protruding parts 40a in the medium width direction and then bringing the protruding parts 40a into contact with the opposing part 45, the posture of the line head 40 relative to the opposing part 45 is also appropriately determined.

[0303] Therefore, for example, the position of the line head 40 when the protruding part 40a contacts the opposing part 45 can be used as the above-mentioned first recording position. Thereby, the impression plate gap can be set very appropriately, and in addition, the parallelism of the line head 40 relative to the opposing part 45 can be ensured, and appropriate recording quality can be obtained.

[0304] It should be noted that in order to grasp the posture of the line head 40 relative to the opposing part 45, a plurality of linear ENC 107s can be provided at intervals in the X-axis direction, thereby detecting the posture of the line head 40 relative to the opposing part 45. In addition, at this time, in order to correct the posture of the line head 40 relative to the opposing part 45, the rotating body 74A provided near the +X direction end of the shaft 77 and the rotating body 74B provided at the -X direction end can be driven by different motors.

[0305] In addition, in the present embodiment, the moving unit 110 has a reduction mechanism 76 with a reduction ratio greater than 1 when transmitting power from the head moving motor 101 to the recording head. The control unit 100 grasps the position of the line head 40 in the moving direction based on the signal of the linear ENC 107, and controls the head moving motor 101 based on the signal of the rotary ENC 103. In other words, the control method implemented by the control unit 100 includes the following steps: grasping the position of the line head 40 in the moving direction based on the signal of the linear ENC 107, and controlling the head moving motor 101 based on the signal of the rotary ENC 103.

[0306] According to such a configuration, since it is a configuration in which the movement of the line head 40 is directly detected by the linear ENC 107, the position of the line head 40 can be appropriately grasped. As a result, it is easy to appropriately adjust the gap between the line head 40 and the opposing portion 45.

[0307] In addition, in the motor control based on the detection signal of the rotary ENC 103, by referring to the detection signal of the linear ENC 107, the position of the line head 40 can be accurately grasped without being affected by the backlash of the gears constituting the moving unit 110.

[0308] Here, since the linear ENC 107 is a configuration that directly detects the movement of the line head 40, depending on the resolution of the linear ENC 107, it may not be possible to obtain the stop accuracy when the head moving motor 101 stops. As a result, it may not be possible to accurately stop the line head 40 at the desired position. However, in the present embodiment, the moving unit 110 has a reduction mechanism 76 with a reduction ratio greater than 1 when transmitting power from the head moving motor 101 to the line head 40. Thereby, the resolution of the rotary ENC 103 can be ensured. And by controlling the head moving motor 101 based on the signal of the rotary ENC 103, the stop accuracy when the head moving motor 101 stops can be improved, and it is easy to accurately stop the line head 40 at the desired position.

[0309] In addition, the control unit 100 detects each area constituting the moving area based on the origin position of the line head 40 in the moving direction, and controls the head moving motor 101 with control parameters corresponding to each area. Therefore, through appropriate control corresponding to each area, the line head 40 can be appropriately positioned.

[0310] In addition, the control parameter includes the torque limit value of the head moving motor 101. Thereby, the following effects can be obtained.

[0311] When the loads applied to the head movement motor 101 are different in the respective areas that make up the moving area of the line head 40, the required motor drive torque is different. Therefore, when a large torque limit value is set for an area with a small load, an excessive load is applied to the mechanism components in the event of an abnormality, which may cause damage to the mechanism components, etc.

[0312] However, since the above control parameters include the torque limit value of the head movement motor 101, it is possible to suppress damage to the above mechanism components, etc.

[0313] It should be noted that the above control parameters may also be other parameters such as the target speed of the head movement motor 101, the gain Kp of PID control, etc., or may be any two or more of these multiple parameters.

[0314] In addition, the control unit 100 temporarily stops the head movement motor 101 at the boundary of each area that makes up the moving area ( Figure 24 step S105). That is, at the boundary of each area that makes up the moving area of the line head 40, a collision sound between components may be generated along with the switching of the drive mechanism. However, by temporarily stopping the head movement motor 101 at the boundary of each area that makes up the moving area, the generation of the above collision sound can be suppressed.

[0315] It should be noted that instead of temporarily stopping the head movement motor 101, the speed of the head movement motor 101 can be reduced.

[0316] In addition, as an example of an acceptance unit that accepts a selection of either the speed priority mode or the normal mode when moving the line head 40, the printer 1 has an operation unit 115. Then, when the speed priority mode is selected, the control unit 100 continuously drives the head movement motor 101 at the boundary of each area that makes up the moving area ( Figure 24 step S106). In addition, when the normal mode is selected, the control unit 100 temporarily stops the head movement motor 101 at the boundary of each area that makes up the moving area ( Figure 24 step S105).

[0317] At the boundary of each area that makes up the moving area of the line head 40, a collision sound between components may be generated along with the switching of the drive mechanism. However, in the normal mode, since the head movement motor 101 is temporarily stopped at the boundary of each area that makes up the moving area of the line head 40, the generation of the above collision sound can be suppressed.

[0318] In addition, in the speed priority mode, since the head movement motor 101 is continuously driven at the boundary of each area that makes up the moving area of the line head 40, the throughput of processing can be improved.

[0319] Hereinafter, a modified example of the above-described embodiment will be described.

[0320] The above-described medium conveyance path Ta is not limited to being parallel to the X-Y plane, and may have an angle with respect to the X-Y plane. Therefore, the moving direction of the line head 40 is not limited to being parallel to the Z-axis direction, and may have an angle with respect to the Z-axis direction.

[0321] In addition, instead of providing the protruding portion 40a at the position where it abuts against the upstream support portion 46, it may be provided at the position where it abuts against the baffle 47.

[0322] In addition, the control unit 100 may also separately use the encoder used in the control of the head movement motor 101 in accordance with the operation. For example, in the case of performing the origin detection operation, the head movement motor 101 may be controlled based on the output signal of the linear ENC 107. Then, after the origin detection operation is performed, the head movement motor 101 may be controlled based on the output signal of the rotary ENC 103.

[0323] In addition, the head movement motor 101 may be controlled based on the output signal of the linear ENC 107, and if the origin is detected due to a speed reduction, the control using the rotary ENC 103 may be switched during driving. By seamlessly switching the target position during driving, that is, by converting from the linear ENC position to the rotary ENC position, throughput can be improved because there is no accompanying deceleration, stop, or acceleration.

[0324] Moreover, the present invention is not limited to the embodiments or modified examples described above, and various modifications can be made within the scope of the invention described in the claims, and these modifications are of course included in the scope of the present invention.

Claims

1. A recording device, characterized in that: have: Conveying path, conveying medium; a recording unit movable relative to the transport path in a direction intersecting a recording surface of the medium; and a moving unit that moves the recording unit, The moving area of ​​the recording unit has: First region; as well as a second area further away from the transport path than the first area, The mobile unit comprises: a first moving unit that moves the recording unit in the first area; as well as a second moving unit that moves the recording unit in the second area, The recording section: When migrating from the first area to the second area, the state of being moved by the first moving part is changed to the state of being moved by the second moving part. When migrating from the second area to the first area, the state of being moved by the second moving part is changed to the state of being moved by the first moving part. The first moving part and the second moving part are driven by a common driving source.

2. The recording device according to claim 1, characterized in that The first moving part includes a cam, the cam is rotated by the power of the driving source, and the cam moves the recording part by rotating while supporting the recording part. The second moving part comprises: a rack disposed on the recording portion; and The pinion gear meshes with the rack gear and is rotated by the power of the driving source to move the recording unit.

3. The recording device according to claim 2, characterized in that The recording device includes a rotating body which is integrally formed by the cam and the pinion gear and is rotated by power of the driving source.

4. The recording device according to claim 3, characterized in that The pinion has a first phase region where a portion of the teeth are missing, When the first phase region faces the rack, the cam supports the recording section.

5. The recording device according to claim 4, characterized in that When the movement of the recording part based on the cam is transferred to the movement of the recording part based on the pinion, and when the movement of the recording part based on the pinion is transferred to the movement of the recording part based on the cam, a state is temporarily formed in which the cam contacts the recording part and the pinion is meshed with the rack.

6. The recording device according to claim 5, characterized in that The recording unit includes a rack member integrally formed of a contact portion that contacts the cam and the rack.

7. The recording device according to claim 6, characterized in that The recording device comprises: a frame that guides the recording section in a moving direction of the recording section; and The rotation axis of the rotating body, The rotating shaft is rotatably supported by the frame.

8. The recording device according to claim 3, characterized in that The recording unit includes a liquid ejection head, the liquid ejection head includes a plurality of nozzles for ejecting liquid along a width direction intersecting a medium conveying direction, and the liquid is ejected from the nozzles without moving in the width direction. A cover portion is provided at a position facing the liquid ejection head and covers a liquid ejection surface of the liquid ejection head. The cover portion is displaceable in a direction of advancing and retreating relative to the liquid ejection head, The recording device includes a pressing member for pressing the cover toward the liquid ejection head. The recording portion is further movable from the first region toward a position where the liquid ejection surface is covered by the cover portion, The rotating body is provided with a pressing portion, and after the contact between the abutting portion of the recording portion abutting against the cam and the cam is released, the pressing portion presses the recording portion toward the cover portion as the rotating body rotates.

9. The recording device according to claim 8, characterized in that The state in which the recording portion is supported by the cam and the state in which the pressing portion presses down the recording portion are not simultaneously formed.

10. The recording device according to claim 9, characterized in that The recording section includes a rack member integrally formed of a pressed portion as a portion engaged with the pressing portion, the contact portion, and the rack.

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