JP2017100436A - Liquid discharge device, power transmission device, and recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To switch the movement of a cap and the driving of a separate device and reduce time taken for moving the cap from a capping state to an uncapping position as much as possible by a movement gear moving according to a rotation direction of a motor.SOLUTION: A planetary gear 139b is rotated around a sun gear 139a in a direction corresponding to a rotation direction of an ASF motor so as to be selectively engaged with either a crank gear 73 or a valve drive gear 134a. When the ASF motor is further rotated in a state that the planetary gear 139a is engaged with the crank gear 73, a slide cam is reciprocated in a conveyance direction and a nozzle cap 61 is elevated/lowered between a capping position and an uncapping position by interlocking with the reciprocation. The crank gear 73 is formed of a synthetic resin material containing glass fibers. The planetary gear 139a and the valve drive gear 134a are formed of a synthetic resin material which does not contain glass fibers.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a liquid ejection device, a power transmission device, and a recording device.

  As an example of a power transmission device that selectively transmits power from a single motor to a plurality of driven objects, an ink jet printing apparatus disclosed in Patent Document 1 is provided with a power transmission device. In this power transmission device, when the motor is driven forward, the planetary gear constituting the pendulum transmission gear is swung to the right and meshed with the cam gear. When the motor is driven to rotate in the capping state, the planetary gear is swung to the left and pumped. It meshes with the gear part of the roller holder.

JP 11-138830 A

  Here, in an ink jet printing apparatus as described in Patent Document 1, normally, in a standby state in which recording is not performed, the cap is positioned at a position in close contact with the print head in order to prevent the ink in the ejection port from drying. Wait while waiting. When recording, the cap is separated from the print head by rotating the motor forward from this state. However, in Patent Document 1, the planetary gear is configured to move according to the rotation direction of the motor and selectively mesh with either the cam gear or the gear portion of the pump roller holder. Therefore, during standby, some external force is applied to the planetary gear, and the planetary gear and the cam gear may be disengaged. When the planetary gear and the cam gear are disengaged, when the motor is rotated forward to move the cap away from the print head, the movement of the cap is started from the point when the planetary gear moves to the position where it engages with the cam gear. . Therefore, in this case, it takes longer to complete the movement of the cap than when the planetary gear is engaged with the cam gear and the motor is driven forward. In this way, in the configuration in which the power transmission is switched by moving the moving gear such as the planetary gear, the cam gear and the planetary gear for transmitting the power to the driven object when the driven object is driven. When the moving gear such as the above is disengaged, it takes time to mesh the cam gear and the moving gear. For this reason, since power transmission is started after the cam gear and the moving gear are engaged with each other, it takes a long time to start power transmission.

  An object of the present invention is to provide a liquid ejection apparatus, a power transmission apparatus, and a recording apparatus that can shorten the time required to start power transmission to a driven object as much as possible.

  The liquid ejection apparatus according to the present invention includes a liquid ejection head having a plurality of nozzles, a liquid ejection surface on which the plurality of nozzles are formed, and a cap for contacting the liquid ejection surface and covering the plurality of nozzles. A cap moving device that moves the cap between a capping position that contacts the liquid discharge surface and covers the plurality of nozzles and an uncapping position that is remote from the liquid discharge surface; and drives the cap moving device. A motor for driving, a driven device different from the cap moving device driven by the motor, and a first device for transmitting the power of the motor connected to the cap moving device to the cap moving device A transmission gear, a second transmission gear connected to the driven device for transmitting the power of the motor to the driven device, and connected to the motor. A moving gear that moves between a position that meshes with the first transmission gear and a position that meshes with the second transmission gear in accordance with the direction of rotation of the motor, and wherein, of the first transmission gear and the moving gear, At least one of the gears is made of a synthetic resin material containing glass fibers.

  In addition, the liquid ejection device according to the present invention includes a liquid ejection head having a plurality of nozzles, a liquid ejection surface on which the plurality of nozzles are formed, and a cover for covering the plurality of nozzles in contact with the liquid ejection surface. A cap, a cap moving device that moves the cap between a capping position that contacts the liquid discharge surface and covers the plurality of nozzles, and an uncapping position away from the liquid discharge device; and the cap moving device. A motor for driving, a driven device driven by the motor, different from the cap moving device, a first transmission gear for transmitting the power of the motor to the cap moving device, and the motor The second transmission gear for transmitting power to the driven device and the power transmitted from the motor, and the first transmission gear according to the rotation direction of the motor. And a moving gear that moves so as to selectively mesh with either of the second transmission gears, and the maximum frictional force between the gears when the first transmission gear and the moving gear mesh with each other is It is larger than the maximum frictional force between the gears of the second transmission gear and the moving gear when they are engaged with each other.

  The power transmission device of the present invention is connected to a motor, a first driven device driven by the motor, a second driven device driven by the motor, and the first driven device. In addition, a first transmission gear for transmitting the power of the motor to the first driven device and a power of the motor connected to the second driven device are transmitted to the second driven device. A second transmission gear, and a moving gear that is connected to the motor and moves between a position that meshes with the first transmission gear and a position that meshes with the second transmission gear according to the rotational direction of the motor. The first transmission gear and the moving gear have a maximum frictional force between the gears meshed with each other, and the maximum frictional force between the second transmission gear and the moving gears meshed with each other. Bigger than.

  Further, the recording apparatus of the present invention includes a storage unit that stores a recording medium, a supply mechanism that takes out the recording medium stored in the storage unit from the storage unit, and a recording medium that is taken out by the supply mechanism. A conveyance mechanism that conveys the recording medium in a conveyance direction so as to face a recording head for recording, and the power transmission mechanism, wherein the conveyance mechanism is the first driven device, A paper mechanism is the second driven device.

In addition, the recording apparatus of the present invention includes a recording head for recording on a recording medium, a first storage unit that stores the recording medium, a second storage unit that stores the recording medium, and the first storage unit. And a second supply mechanism for taking out the recording medium housed in the second housing part from the second housing part. And the power transmission mechanism, wherein the first supply mechanism is the first driven device,
The second supply mechanism is the second driven device.

  In the present invention, when the first transmission gear and the moving gear are engaged with each other, the engagement between the first transmission gear and the moving gear is less likely to be disengaged than when the second transmission gear and the moving gear are engaged with each other. Therefore, the time until the power transmission to the driven object is started can be shortened as much as possible.

  The term “connected to the cap moving device” in the present invention includes not only being directly connected to the cap moving device but also being connected to the cap moving device via another gear or the like. . Similarly, “connected to the driven device” in the present invention is not only directly connected to the driven device, but also connected to the driven device via another gear or the like. Including.

1 is a schematic configuration diagram viewed from the side of a printer according to an embodiment of the present invention. It is a schematic block diagram in the planar view of a printing part and a maintenance unit. (A) is a figure which shows arrangement | positioning of the cap raising / lowering apparatus and switching valve, and gear which are connected to these seen from the right side of a scanning direction, (b) is an expansion of the groove peripheral part of the slide cam of (a). FIG. It is a top view of a slide cam. FIG. 5 is a cross-sectional view taken along line VV of the switching valve in FIG. (A) is a figure equivalent to Drawing 3 (a) showing the state where a nozzle cap is located in a capping position, and (b) shows the state when a nozzle cap is located in an uncapping position. It is a figure equivalent to Fig.3 (a). 3A is a view corresponding to FIG. 3A showing a state where the nozzle cap is lowered and positioned at the intermediate position, and FIG. 3B is a view showing a state where the nozzle cap is raised and positioned at the intermediate position. It is a figure equivalent to 3 (a). It is a figure which shows the change of the position of a slide cam, and the detection state of a sensor. FIG. 4 is a view corresponding to FIG. 3A showing a state when the switching valve is driven. It is a figure which shows the material which comprises a planetary gear, the crank gear which selectively meshes | engages with this, and a valve drive gear. It is a figure which shows arrangement | positioning of the suction pump and the gear connected to this seen from the right side of the scanning direction. It is a figure for demonstrating the connection relationship of a PF motor, a paper feed roller, a PF input gear, and a PF switching gear, (a) is a state where the ASF switching gear is meshed with the paper feeding gear, (b) is a PF The state where the switching gear is not meshed with the pump drive gear and the ASF gear is meshed with the selected drive gear. (C) is the state where the PF switch gear is meshed with the pump drive gear and the ASF gear is meshed with the selected drive gear. Is shown. It is a figure for demonstrating the connection relationship of an ASF motor, an ASF input gear, and an ASF switching gear, and the switching of the connection by an ASF gear. (A) is a state corresponding to FIG. 12 (a), (b) is FIG. 12B shows a state corresponding to FIG. 12B, and FIG. 12C shows a state corresponding to FIG. (A) is an exploded perspective view of the clutch gear of FIG. 13, and (b) is a view of (a) seen from the direction of arrow B. FIG. FIG. 2 is a block diagram illustrating an electrical configuration of a printer. It is a figure which shows the communication relationship of a nozzle cap, a switching valve, and a suction pump, (a) is a standby state, (b) is a state at the time of valve cleaning, (c) is a state at the time of black suction purge, (d) Is a state during color suction purge, (e) is a state during black idle suction, and (f) is a state during color empty suction. 6 is a flowchart illustrating a flow when printing is performed by a printer. It is a flowchart which shows the flow of a maintenance. (A) is a figure equivalent to FIG. 10 of modification 1, (b) is a figure equivalent to FIG. 10 of modification 2, (c) is a figure equivalent to FIG. 10 of modification 3, (d ) Is a diagram corresponding to FIG. 10 of Modification 4, and (e) is a diagram corresponding to FIG. 10 of Modification 5. (A) is a figure which shows an example of the relationship of the content rate of the glass fiber of the crank gear and planetary gear in the modifications 2 and 5, (b) is the crank gear and valve drive gear in the modifications 3 and 5. It is a figure which shows an example of the relationship of the content rate of glass fiber. FIG. 10 is a schematic configuration diagram viewed from the side of a printer 200 according to Modification 6. FIG. 10 is a schematic configuration diagram viewed from the side of a printer 300 according to Modification 7.

  Hereinafter, preferred embodiments of the present invention will be described.

(Entire printer configuration)
As shown in FIGS. 1 and 2, the printer 1 according to the present embodiment (the “liquid ejection device” of the present invention) includes a printing unit 2, a paper feeding unit 3, a maintenance unit 7, and the like.

(Printing department)
The printing unit 2 includes a carriage 11, an inkjet head 12 (“liquid ejection head” of the present invention), transport rollers 13 and 14, a platen 15, and the like. The carriage 11 is supported by two guide rails 16 extending in the scanning direction so as to be movable in the scanning direction. The carriage 11 is connected to a carriage motor 156 (see FIG. 15) via a belt and a pulley (not shown), and is driven by the carriage motor 156 to reciprocate in the scanning direction. In the following description, as shown in FIG. 2, the right and left sides in the scanning direction are defined.

  The inkjet head 12 is mounted on the carriage 11 and ejects ink from a plurality of nozzles 17 formed on the ink ejection surface 12a (the “liquid ejection surface” of the present invention) which is the lower surface thereof. The plurality of nozzles 17 form a nozzle row 18 by being arranged in the transport direction orthogonal to the scanning direction. In the inkjet head 12, four nozzle rows 18 are arranged side by side in the scanning direction. From the plurality of nozzles 17, black, yellow, cyan, and magenta inks are ejected in order from the nozzle array 18 on the right side in the scanning direction.

  The transport roller 13 is disposed on the upstream side of the carriage 11 in the transport direction parallel to the ink discharge surface 12a and orthogonal to the scanning direction. The conveyance roller 13 includes a driving roller 13a and a driven roller 13b arranged on the upper side of the driving roller 13a. The drive roller 13a is connected to the PF motor 101 (see FIG. 12) as will be described later. When the PF motor 101 is reversely rotated (CCW), power is transmitted from the PF motor 101 to the driving roller 13a, and the driving roller 13a rotates in the clockwise direction in FIG. Thus, the recording paper P can be transported in the transport direction while being sandwiched between the driving roller 13a and the driven roller 13b. On the other hand, when the PF motor 101 is rotated forward (CW), the drive roller 13a rotates counterclockwise in FIG.

  The conveyance roller 14 is disposed downstream of the carriage 11 in the conveyance direction. The conveyance roller 14 includes a driving roller 14a and a driven roller 14b disposed on the upper side of the driving roller 14a. The driving roller 14a is connected to the driving roller 13a via a plurality of gears (not shown). Thus, when power is transmitted from the PF motor 101 to the driving roller 13a, driving force is also transmitted to the driving roller 14a, and the driving roller 14a rotates. Further, the rotation directions of the driving rollers 13a and 14a at this time are the same. Thereby, when the PF motor 101 is reversely rotated (CCW), the recording paper P can be transported in the transport direction while being sandwiched between the drive roller 14a and the driven roller 14b.

  The platen 15 is disposed between the transport roller 13 and the transport roller 14 in the transport direction so as to face the ink ejection surface 12a. The platen 15 supports the recording paper P transported by the transport rollers 13 and 14 from below.

(Paper Feeder)
The sheet feeding unit 3 is disposed below the platen 15. The paper feed unit 3 includes a paper cassette 21 and a paper feed roller 22. The paper cassette 21 contains a plurality of recording papers P stacked one above the other. As will be described later, the paper feed roller 22 is configured to be connectable to the ASF motor 102 via a plurality of gears (not shown except for the paper feed gear 131) including a paper feed gear 131 (see FIG. 12). . When the ASF motor 102 is rotated forward with the paper feed roller 22 connected to the ASF motor 102, power is transmitted from the ASF motor 102 to the paper feed roller 22, and the paper feed roller 22 is connected to the timepiece of FIG. Rotate around. As a result, the recording paper P stored in the paper cassette 21 is transported toward the upstream side in the transport direction. A supply path 10 is provided on the upstream side in the transport direction of the paper cassette 21 to guide the recording paper P sent from the downstream side in the transport direction to a position on the upstream side in the transport direction of the transport roller 13. Yes. The recording paper P transported by the paper feed roller 22 is transported along the supply path 10 to the upstream side in the transport direction of the transport roller 13 as shown by an arrow A in FIG. Supplied.

(Maintenance unit)
Next, the maintenance unit 7 will be described. As shown in FIGS. 2 to 11, the maintenance unit 7 includes a wiper 59, a nozzle cap 61, a switching valve 62 (“driven device” of the present invention), a suction pump 63, and a waste liquid tank 64.

<Wiper>
The wiper 59 is disposed on the right side of the platen 15. The wiper 59 can be moved up and down by a wiper lifting device 157 (see FIG. 15). When the wiper 59 is lifted by the wiper lifting / lowering device 157, the upper end of the wiper 59 is positioned above the ink discharge surface 12a. Accordingly, when the carriage 11 is moved at a position facing the wiper 59 in this state, the wiper 59 comes into contact with the ink ejection surface 12a. On the other hand, when the wiper 59 is lowered by the wiper lifting / lowering device 157, the upper end of the wiper 59 is positioned below the ink discharge surface 12a. Accordingly, even if the carriage 11 is moved at a position facing the wiper 59 in this state, the wiper 59 does not contact the ink discharge surface 12a.

<Nozzle cap>
The nozzle cap 61 is made of a rubber material or the like and is disposed on the right side of the wiper 59 in the scanning direction. The nozzle cap 61 has two cap portions 61a and 61b. The cap parts 61a and 61b are arranged side by side in the scanning direction so that the cap part 61a is adjacent to the right side of the cap part 61b. When the carriage 11 is moved to a position where the ink ejection surface 12a faces the nozzle cap 61, the rightmost nozzle row 18 overlaps the cap portion 61a, and the left three nozzle rows 18 overlap the cap portion 61b. The nozzle cap 61 can be moved up and down by a cap lifting device 70 described later. When the nozzle cap 61 is raised in a state where the ink discharge surface 12a faces the nozzle cap 61, the nozzle cap 61 is moved to the ink discharge surface. 12a, the rightmost nozzle row 18 is covered with the cap portion 61a, and the left three nozzle rows 18 are covered with the cap portion 61b.

<Cap lifting device>
Here, the cap raising / lowering device 70 (the “cap moving device” of the present invention) for raising and lowering the nozzle cap 61 will be described. As shown in FIGS. 3 to 5, the cap lifting device 70 includes a cap holding portion 71 and a slide cam 72.

  The cap holding part 71 includes a cap holder 67, a support member 68, and a spring 69. The cap holder 67 secures the rigidity of the nozzle cap 61 by supporting the nozzle cap 61 from below. The support member 68 is disposed below the cap holder 67 and supports the cap holder 67 from below. Further, a guide member 58 is disposed so as to surround the support member 68. Protruding portions 68a extending in the vertical direction are formed on both end surfaces of the support member 68 in the transport direction. On the other hand, the guide member 58 is formed with a guide groove 58a that extends in the vertical direction and engages with the protruding portion 68a. Thereby, the protrusion 68a of the support member 68 moves along the guide groove 58a, so that the support member 68 and the nozzle cap 61 supported by the support member 68 can be moved up and down. The guide member 58 is fixed to a frame (not shown) provided in the main body of the printer 1.

  In addition, in the vicinity of both end portions in the scanning direction of the lower surface of the support member 68, a protruding portion 68b protruding downward is provided, and an outer side surface of each protruding portion 68b in the scanning direction is provided in the scanning direction. An extended protrusion 68c is formed. The spring 69 is disposed between the cap holder 67 and the support member 68 and urges the cap holder 67 upward.

  The slide cam 72 has two portions 76 and 77. The portion 76 is disposed below the support member 68 and extends in the transport direction. 76a is formed at both ends of the portion 76 in the scanning direction. And the support member 68 and the slide cam 72 are connected by inserting the protrusion 68c of the support member 68 in the groove | channel 76a. As shown in FIG. 3B, the groove 76a has three parallel portions 76b, 76c, and 76d, and two inclined portions 76e and 76f. In FIG. 3B, the length of the slide cam 72 in the transport direction is illustrated to be longer than that in FIG. 3A in order to make the structure of the groove 76a easier to understand.

  The parallel portion 76b is provided at an upstream end of the portion 76 in the transport direction, and extends in parallel with the transport direction. The parallel portion 76c is disposed downstream and below the transport direction with respect to the parallel portion 76b of the portion 76, and extends in parallel with the transport direction. The parallel portion 76d is disposed between the parallel portion 76b and the parallel portion 76c in the transport direction and the vertical direction, and extends in parallel with the transport direction. The inclined portion 76e is disposed between the parallel portion 76b and the parallel portion 76d in the transport direction, extends inclined with respect to the transport direction, and connects the parallel portion 76b and the parallel portion 76d. The inclined portion 76f is disposed between the parallel portion 76c and the parallel portion 76d in the transport direction, extends inclined with respect to the transport direction, and connects the parallel portion 76c and the parallel portion 76d. The inclined portion 76e and the inclined portion 76f have substantially the same inclination angle with respect to the conveying direction and the length in the conveying direction.

  The portion 77 is narrower than the portion 76 and extends from the central portion of the downstream end portion in the transport direction of the portion 76 to the downstream side in the transport direction. An arm support portion 77a is provided at the downstream end of the portion 77 in the transport direction. The arm support portion 77a is a portion for supporting an arm 74 described later, and extends in the scanning direction. A gear portion 77c extending along the transport direction is formed on the left side surface 77b of the portion 77 in the scanning direction. An oil damper 78 that meshes with the gear portion 77 c is provided for the slide cam 72. As will be described later, the oil damper 78 is intended to prevent the slide cam 72 from slipping (rapid movement) in the transport direction. In addition, a protruding portion 77d extending in the transport direction is provided on a portion of the left side surface 77b of the portion 77 in the scanning direction on the upstream side of the gear portion 77c in the transport direction. On the other hand, on the left side of the portion 77 in the scanning direction, a guide member 80 (“cam movement support portion” of the present invention) is disposed. A groove 80a extending in the transport direction is formed on the right side surface of the guide member 80 in the scanning direction. A protrusion 77d is engaged with the groove 80a. The projecting portion 77d moves along the groove 80a, so that the slide cam 76 can move in the transport direction. The guide member 80 is fixed to a frame (not shown) provided on the main body of the printer 1.

  The slide cam 72 is provided with a sensor 79 for detecting the position in the transport direction. The sensor 79 includes a light emitting element 79a and a light receiving element 79b. The light emitting element 79 a is disposed on the left side in the scanning direction of the portion 77, and the light receiving element 79 b is disposed on the right side in the scanning direction of the portion 77. The light emitting element 79a emits light toward the light receiving element 79b. The light receiving element 79b is for receiving the light emitted from the light emitting element 79a. Correspondingly, a light shielding portion 77e is provided on the lower surface of the portion 77. As will be described later, when the slide cam 72 moves in the transport direction, the light shielding unit 77e switches whether to block the light emitted from the light emitting element 79a. The sensor 79 is turned off when the light emitted from the light emitting element 79a is received by the light receiving element 79b and does not output a signal, and the light emitted from the light emitting element 79a is not received by the light receiving element 79b. Turns on and outputs a signal. The position of the slide cam 72 and the on / off switching of the sensor 79 will be described in detail later.

  The slide cam 72 is connected to a crank gear 73 (the “first transmission gear” of the present invention) via an arm 74. More specifically, the crank gear 73 is a gear whose axial direction is parallel to the scanning direction. Also. On the side surface of the portion shifted from the center of the crank gear 73, an arm support portion 73a extending in the scanning direction is provided. One end of the arm 74 is swingably supported by the arm support 77 a of the slide cam 72, and the other end is swingably supported by the arm support 73 a of the crank gear 73. Thus, the slide cam 72 and the crank gear 73 are connected via the arm 74.

<Switching valve>
As shown in FIGS. 3 and 5, the switching valve 62 includes a housing member 81 and a flow path member 82. The housing member 81 is a cylindrical member whose lower end is closed. The housing member 81 has two cap communication ports 84a and 84b, an air communication port 84c, and a pump communication port 84d. The communication ports 84 a to 84 d communicate with the internal space 81 a of the housing member 81 and protrude in different directions outside the housing member 81 in the radial direction. The cap communication port 84a communicates with the cap portion 61a through the tube 86a. The cap communication port 84b communicates with the cap portion 61b through the tube 86b. The atmosphere communication port 84c communicates with the waste liquid tank 64 through the tube 86c. The pump communication port 84d communicates with the suction pump 63 via the tube 86d.

  The flow path member 82 is a cylindrical member made of a rubber material or the like, and is rotatably accommodated in the internal space 81 a of the accommodation member 81. The flow path member 82 is formed with a groove (not shown) that forms an ink flow path for communicating the communication ports 84a to 84d with each other. The flow path member 82 is attached to the valve cam 85. The valve cam 85 is connected to a valve drive gear group 134 including a valve drive gear 134a (the “second transmission gear” of the present invention). The valve drive gear 134a is a gear whose axial direction is parallel to the scanning direction. In addition, since the structure itself of the switching valve 62 is the same as that of the prior art, further detailed description is omitted here.

<Selected gear mechanism>
Here, in the present embodiment, power can be selectively transmitted from the ASF motor 102 to any one of the cap lifting device 70 and the switching valve 62 via the selection gear mechanism 136. More specifically, as shown in FIG. 3A, the selection gear mechanism 136 includes a selection drive gear 137 and a planetary gear mechanism 139. The selection drive gear 137 is a gear whose axial direction is parallel to the scanning direction, and is configured to be able to mesh with an ASF switching gear 122 described later. The selective drive gear 137 is transmitted with power from the ASF motor 102 in a state of being engaged with the ASF switching gear 122. The planetary gear mechanism 139 includes a sun gear 139a, a planetary gear 139b, and a connecting member 139c. The sun gear 139a is a gear whose axial direction is parallel to the scanning direction, and meshes with the selective drive gear 137. The planetary gear 139b is a gear whose axial direction is parallel to the scanning direction, and meshes with the sun gear 139a. The connecting member 139c connects the sun gear 139a and the planetary gear 139b. The sun gear 139a and the planetary gear 139b are rotatably supported by the connecting member 139c. In the planetary gear mechanism 139, when the sun gear 139a rotates, the planetary gear 139b rotates about the axis of the sun gear 139a while rotating about its own axis. At this time, the planetary gear 139b is rotated about the axis of the sun gear 139a by being guided by the sun gear 139a and the connecting member 139c. That is, in the present embodiment, the sun gear 139a and the connecting member 139c correspond to the “guide portion” of the present invention.

  Then, when the ASF motor 102 is rotated forward (CW) with the selection drive gear 137 connected to the ASF motor 102, the power of the ASF motor 102 is transmitted to the gears 137, 139a, 139b, and FIG. , (B), and FIGS. 7 (a) and (b), the sun gear 139a rotates counterclockwise in these figures, and the planetary gear 139b is centered around the axis of the sun gear 139a. It rotates in the clockwise direction in the figure. Thereby, the planetary gear 139b moves upward and meshes with the crank gear 73 from below. Further, the planetary gear 139 b is positioned below the crank gear 73 in a state where it is engaged with the crank gear 73.

  When the planetary gear 139b and the crank gear 73 are engaged with each other, when the ASF motor 102 continues to rotate forward, the power of the ASF motor 102 is transmitted to the crank gear 73, and the crank gear 73 is counterclockwise as shown in these figures. Rotate around. In conjunction with this, the slide cam 72 reciprocates in the transport direction.

  When the slide cam 72 moves to the upstream side in the transport direction, the protrusion 68c of the support member 68 causes the parallel portion 76b, the inclined portion 76e, the parallel portion 76d, the inclined portion 76f, and the parallel portion of the sliding surface 76a1 of the groove 76a. It slides in this order with the part formed by the part 76c. Thereby, the cap holding | maintenance part 71 and the nozzle cap 61 fall. On the other hand, when the slide cam 72 moves to the downstream side in the transport direction, the protrusion 68c of the support member 68 causes the parallel portion 76c, the inclined portion 76f, the parallel portion 76d, the inclined portion 76e, and the parallel of the sliding surface 76a1 of the groove 76a. It slides in this order with the part formed by the part 76b. Thereby, the cap holding | maintenance part 71 and the nozzle cap 61 raise. At this time, the oil damper 78 rotates in conjunction with the movement of the slide cam 72. Thus, in the cap lifting device 70, the rotation of the crank gear 73 in one direction is converted into a reciprocating movement of the slide cam 72 in the transport direction, and the protrusion 68c of the support member 68 is slid in the groove 76a of the slide cam 72. The cap holding part 71 and the nozzle cap 61 are moved up and down by sliding with the surface 76a1.

  As shown in FIG. 6A, when the projection 68c is positioned at the parallel portion 76b, the nozzle cap 61 contacts the ink ejection surface 12a and covers the plurality of nozzles 17 (hereinafter, this is referred to as “this”). The position of the nozzle cap 61 at this time is referred to as a “capping position”). Further, as shown in FIG. 6B, when the projection 68c is located at the parallel portion 76c, the nozzle cap 61 is separated from the ink discharge surface 12a (hereinafter, the position of the nozzle cap 61 is referred to as “un-enhanced”). Capping position). Further, as shown in FIGS. 7A and 7B, when the projection 68c is positioned at the parallel portion 76d, the nozzle cap 61 is separated from the ink ejection surface 12a, but the projection 68c is positioned at the parallel portion 76c. The distance between the nozzle cap 61 and the ink ejection surface 12a is smaller than when the nozzle cap 61 is in operation (hereinafter, the position of the nozzle cap 61 at this time is referred to as an “intermediate position”).

  Here, the control of the ASF motor 102 when the nozzle cap 61 is moved between the capping position, the uncapping position, and the intermediate position will be described. In the present embodiment, as shown in FIG. 8A, the protrusion 68c is downstream in the transport direction (inclined portion 76f than the predetermined portion of the parallel portion 76c (the portion where the protrusion 68c is located in FIG. 8B). 8c and the projection 68c is in the transport direction more than the predetermined portion of the parallel portion 76b (the portion where the projection 68c is located in FIG. 8F), as shown in FIG. 8 (g). The light shielding part 77e does not oppose the light emitting element 79a and the light receiving element 79b. On the other hand, as shown in FIGS. 8B to 8F, the protrusion 68c is on the upstream side (the inclined portion 76f side) in the transport direction with respect to the predetermined portion of the parallel portion 76c, and the predetermined portion of the parallel portion 76b. The light-shielding part 77e faces the light-emitting element 79a and the light-receiving element 79b when it is located further downstream in the transport direction (on the inclined part 76e side). 8A to 8G, the length of the slide cam 72 in the conveyance direction is longer than that in FIG. 3A in order to make the drawings easy to understand.

  By utilizing this fact, in the present embodiment, as shown in FIG. 6A, the ASF motor 102 is rotated forward and the slide cam 72 is conveyed while the nozzle cap 61 is positioned at the capping position. When the sensor 79 is switched from OFF to ON, the ASF motor 102 is further rotated by a predetermined amount to move the nozzle cap 61 to the capping position as shown in FIG. To the middle position. At this time, since the parallel portion 76d extends in parallel with the transport direction, even if the rotation amount of the ASF motor 102 after the sensor 79 is switched from OFF to ON varies slightly, the protrusion 68c The nozzle cap 61 is surely located at the intermediate position, which is located in any part of 76d. Thereby, even if there is some variation in the rotation amount of the ASF motor 102 after the sensor 79 is switched from OFF to ON, there is no variation in the distance between the nozzle cap 61 and the ink ejection surface 12a.

  Further, in this embodiment, the ASF motor 102 is further rotated forward from this state, and when the sensor 79 is switched from on to off, the ASF motor 102 is further rotated by a predetermined amount, whereby FIG. As shown in b), the nozzle cap 61 can be moved from the intermediate position to the uncapping position. At this time, since the parallel portion 76c extends in parallel with the transport direction, even if the rotation amount of the ASF motor 102 after the sensor 79 is switched from on to off varies slightly, the projection 68c The nozzle cap 61 is surely located in the uncapping position, which is located in any part of 76c.

  Further, in this embodiment, when the ASF motor 102 is further rotated forward from this state to move the slide cam 72 to the downstream side in the transport direction and the sensor 79 is switched from OFF to ON, the ASF motor is further increased. By rotating 102 by a predetermined amount, the nozzle cap 61 can be moved from the uncapping position to the intermediate position as shown in FIG. At this time, since the parallel portion 76d extends in parallel with the transport direction, even if the rotation amount of the ASF motor 102 after the sensor 79 is switched from OFF to ON varies slightly, the protrusion 68c The nozzle cap 61 is surely located at the intermediate position, which is located in any part of 76d. That is, even if there is some variation in the amount of rotation of the ASF motor 102 after the sensor 79 is switched from off to on, there is no variation in the distance between the nozzle cap 61 and the ink ejection surface 12a.

  Further, in this embodiment, the ASF motor 102 is further rotated forward from this state, and when the sensor 79 is switched from on to off, the ASF motor 102 is further rotated by a predetermined amount, whereby FIG. As shown in a), the nozzle cap 61 can be moved from the intermediate position to the capping position. At this time, since the parallel portion 76b extends in parallel with the transport direction, even if the amount of rotation of the ASF motor 102 after the sensor 79 is switched from on to off varies slightly, the projection 68c The nozzle cap 61 is surely located at the capping position.

  On the other hand, when the ASF motor 102 is reversely rotated (CCW) with the selection drive gear 137 connected to the ASF motor 102, the power of the ASF motor 102 is transmitted to the gears 137, 139a and 139b, as shown in FIG. The sun gear 139a rotates in the clockwise direction of FIG. As a result, the planetary gear 139b rotates counterclockwise in FIG. 9 about the axis of the sun gear 139a, and meshes with the valve drive gear 134a from above. If the reverse rotation of the ASF motor 102 is continued while the planetary gear 139b and the valve drive gear 134a are engaged, the power of the ASF motor 102 is transmitted to the valve drive gear 134a, and each gear constituting the valve drive gear group 134 is The valve cam 85 and the flow path member 82 are rotated. In the switching valve 62, the communication relationship between the communication ports 84a to 84d, such as the communication between the cap communication ports 84a and 84b and the pump communication port 84d and the blocking thereof, can be switched by rotating the flow path member 82. .

<Gear material>
Here, the materials of the planetary gear 139b, the crank gear 73 that can mesh with the planetary gear 139b, and the valve drive gear 134a will be described. In the present embodiment, as shown in FIG. 10, the crank gear 73 is made of a synthetic resin material such as polyacetal resin (POM) containing, for example, glass fiber. Here, the content rate of the glass fiber in the crank gear 73 is, for example, about 25% by weight. On the other hand, the planetary gear 139b and the valve drive gear 134a are made of a synthetic resin material such as polyacetal resin that does not contain glass fiber. Here, in FIG. 10, the presence or absence of glass fiber inclusion in each gear is shown. Note that the gears other than the planetary gear 139b, the crank gear 73, and the valve drive gear 134a in the printer 1 are made of, for example, a synthetic resin material that does not contain glass fiber, similar to the planetary gear 139b and the valve drive gear 134a. Yes.

  The crank gear 73 made of a synthetic resin material containing glass fiber has a larger dynamic friction coefficient than the planetary gear 139b and the valve drive gear 134a made of a synthetic resin material not containing glass fiber. For example, the dynamic friction coefficient with respect to the same material of the polyacetal resin which does not contain glass fiber will be about 0.3. On the other hand, the dynamic friction coefficient with respect to the same material of the polyacetal resin which contains 25 weight% of glass fibers will be about 0.5. Further, for example, in Duracon (registered trademark) M90-44 manufactured by Polyplastics Co., Ltd., which is a POM resin not containing glass fiber, the dynamic friction coefficient with respect to carbon steel is about 0.46. In contrast, in Duracon (registered trademark) GH20 manufactured by Polyplastics Co., Ltd., which is a POM resin containing 20% by mass of glass fiber, the dynamic friction coefficient with respect to carbon steel is about 0.55. Further, in Duracon (registered trademark) GH25 manufactured by Polyplastics Co., Ltd., which is a POM resin containing 25% by mass of glass fiber, the coefficient of dynamic friction with respect to carbon steel is about 0.60.

  As a result, the maximum frictional force between the planetary gear 139b and the crank gear 73 when the planetary gear 139b and the crank gear 73 are engaged with each other is the planetary gear when the planetary gear 139b and the valve drive gear 134a are engaged with each other. It becomes larger than the maximum frictional force between the gear 139b and the valve drive gear 134a.

  The suction pump 63 is a tube pump, and communicates with the pump communication port 84d of the switching valve 62 via the tube 86d as described above, and communicates with the waste liquid tank 64 via the tube 86e on the opposite side of the switching valve 62. doing. Moreover, as shown in FIG. 11, the suction pump 63 has a gear 63a. The gear 63a is connected to a pump drive gear group 141 including the pump drive gear 141a, and is configured to be connectable to the PF motor 101 via the pump drive gear group 141 as will be described later. When the suction pump 63 and the PF motor 101 are connected and the PF motor 101 rotates forward, the power of the PF motor 101 is transmitted to the suction pump 63, and the suction pump 63 communicates with the tubes 86d and 86e. It becomes the interruption state which interrupts. When the forward rotation of the PF motor 101 is further continued, the suction pump 63 performs suction. On the other hand, when the PF motor 101 rotates in reverse, the power of the PF motor 101 is transmitted to the suction pump 63, and the suction pump 63 enters a communication state in which the tubes 86d and 86e are connected. In addition, since the tube pump which can be switched between the shut-off state and the communication state depending on the direction of rotation is a known one, detailed description thereof is omitted here.

  The waste liquid tank 64 is for storing ink discharged by a suction purge described later. The space where the ink in the waste liquid tank 64 is stored communicates with the atmosphere. Thus, the atmosphere communication port 84c communicating with the waste liquid tank 64 via the tube 86c is in communication with the atmosphere. Further, when the suction pump 63 is in the communication state, the pump communication port 84d communicates with the atmosphere via the tubes 86d and 86e, the suction pump 63, and the waste liquid tank 64.

(Motor connection switching)
Next, switching of the connection between the PF motor 101 and the ASF motor 102 will be described with reference to FIGS. 12 (a) to 12 (c) and FIGS. 13 (a) to 13 (c).

  As shown in FIGS. 12A to 12C and FIGS. 13A to 13C, a drive shaft 105 is connected to the PF motor 101. A drive roller 13 a is attached to the drive shaft 105. A PF input gear 111 is attached to the drive shaft 105. When the PF motor 101 is driven, the drive shaft 105, the drive roller 13a, and the PF input gear 111 rotate integrally.

  Further, the PF input gear 111 meshes with the PF switching gear 112. The PF switching gear 112 is rotatably supported by a shaft 106 extending in the scanning direction. The PF switching gear 112 is movable in the scanning direction along the shaft 106 in conjunction with the movement of the carriage 11 in the scanning direction. As a result, the PF switching gear 112 can be selectively moved to any one of the positions shown in FIGS. The PF switching gear 112 is located at the position shown in FIGS. 12A and 12B and is not meshed with the pump drive gear 141a and is located at the position shown in FIG. 12C. And meshes with the pump drive gear 141a. Further, the PF input gear 111 extends in the scanning direction, and the PF switching gear 112 is engaged with the PF input gear 111 when it is located in any of FIGS.

  As shown in FIGS. 12A to 12C and FIGS. 13A to 13C, the ASF motor 102 is connected to the ASF input gear group 120. The ASF input gear group 120 has a clutch gear 121. The clutch gear 121 has two gears 121a and 121b as shown in FIGS. 13 (a) to 13 (c) and FIGS. 14 (a) and 14 (b). The gear 121a (the “first gear” in the present invention) is a gear whose axial direction is parallel to the scanning direction, and is connected to the ASF motor 102 via another gear constituting the ASF input gear group 120. The gear 121b (the “second gear” of the present invention) is disposed coaxially with the gear 121a, extends in the scanning direction, and meshes with the ASF switching gear 122.

  The gear 121a and the gear 121b are connected with play in the rotation direction. More specifically, as shown in FIGS. 14A and 14B, two protrusions 121a1 are formed on the side surface of the gear 121a. The two protrusions 121a1 are arranged with a shift of about 180 ° in the circumferential direction of the gear 121a. Each protrusion 121a1 extends over an angle smaller than 90 ° in the circumferential direction of the gear 121a. On the other hand, a cylindrical rib 121b1 extending in the scanning direction and four ribs 121b2 extending outward from the outer peripheral surface of the rib 121b1 in the radial direction of the gear 121b are formed inside the gear 121b. Of the four ribs 121b2, the ribs 121b2 adjacent to each other in the circumferential direction of the gear 121b are disposed so as to be shifted from each other by about 90 ° in the circumferential direction of the gear 121b. And each gear 121a and the gear 121b are connected by each protrusion part 121a1 of the gear 121a being penetrated by the space 121b3 between the two ribs 121b2 adjacent to the circumferential direction of the gear 121b. When the ASF motor 102 rotates, the gear 121a rotates. The gear 121a rotates alone until the downstream end of the protrusion 121a1 in contact with the rib 121b2 in the rotation direction of the gear 121a, and the downstream end of the protrusion 121a1 contacts the rib 121b2. After that, the gear 121a and the gear 121b rotate integrally.

  The ASF switching gear 122 is attached to the shaft 106 so that the positional relationship with the PF switching gear 112 in the scanning direction is always maintained. Accordingly, when the PF switching gear 112 moves in the scanning direction in conjunction with the movement of the carriage 11, the ASF switching gear 122 also moves in the scanning direction.

  In the present embodiment, the ASF switching gear 122 can be selectively moved to any one of the positions in FIGS. 13A to 13C by moving in the scanning direction. Yes. The ASF switching gear 122 meshes with the paper feed gear 131 in a state where the ASF switching gear 122 is located at the position shown in FIG. In addition, the ASF switching gear 122 meshes with the selection drive gear 137 in the state shown in FIGS. 13B and 13C. Further, since the gear 121b extends in the scanning direction, the ASF switching gear 122 meshes with the gear 121b regardless of the position of the ASF switching gear 122 in FIGS. 13A to 13C. ing.

  Here, before the ASF switching gear 122 is moved between the positions shown in FIGS. 13A to 13C and the gear meshing with the ASF switching gear 122 is switched, the ASF motor 102 is driven to switch the ASF. The gear 122 and the gear meshing with the gear 122 are alternately rotated by minute angles in both directions, thereby facilitating disengagement between the gears. In the present embodiment, the clutch gear 121 is interposed between the ASF motor 102 and the ASF switching gear 122, and the gear 121a and the gear 121b of the clutch gear 121 are relatively rotatable within a range of play. Therefore, at this time, the ASF switching gear 122 and the gear meshing therewith rotate smoothly. Thereby, the frequency | count which performs the said operation | movement can be decreased and the time taken to switch the gear which meshes with the ASF switching gear 122 can be shortened.

(Control device)
Next, the control device 150 for controlling the operation of the printer 1 will be described. As shown in FIG. 15, the control device 150 includes a CPU (Central Processing Unit) 151, a ROM (Read Only Memory) 152, a RAM (Random Access Memory) 153, an ASIC (Application Specific Integrated Circuit) 154, and the like. In cooperation, the operations of the carriage motor 156, the inkjet head 12, the PF motor 101, the ASF motor 102, the wiper lifting device 157, and the like are controlled.

  Here, although only one CPU 151 is illustrated in FIG. 15, the control device 150 includes only one CPU 151, and this one CPU 151 may perform processing in a lump or include a plurality of CPUs 151. The plurality of CPUs 151 may share the processing. In FIG. 15, only one ASIC 154 is illustrated, but the control device 150 may include only one ASIC 154, and this one ASIC 154 may perform processing collectively, or may include a plurality of ASICs 154. The plurality of ASICs 154 may share the processing.

(Printing operation)
Next, a method for performing printing in the printer 1 will be described. In the printer 1, the nozzle cap 61 is positioned at the capping position in a standby state in which printing and maintenance described later are not performed. As a result, the nozzle cap 61 comes into contact with the ink ejection surface 12a, and the ink in the nozzle 17 is prevented from drying. Further, in the standby state, the planetary gear 139b is kept in mesh with the crank gear 73. In the standby state, the switching valve 62 is in a state where the cap communication ports 84a and 84b and the pump communication port 84d communicate with each other as shown in FIG. The suction pump 63 is in the communication state. Thereby, in the standby state, the cap portions 61 a and 61 b of the nozzle cap 61 that covers the plurality of nozzles 17 communicate with the atmosphere via the suction pump 63. Further, in the standby state, the PF switching gear 112 and the ASF switching gear 122 are located at the positions shown in FIG. Note that in FIG. 16A, the suction pump 63 is in a communicating state by attaching arrows pointing upward and downward.

  In order to perform printing in the printer 1, as shown in FIG. 17, first, the ASF motor 102 is rotated forward to lower the nozzle cap 61 from the capping position to the uncapping position (S101). Next, by driving the carriage motor 156 and moving the carriage 11, the PF switching gear 112 and the ASF switching gear 122 are moved to the positions shown in FIG. 12A, and the ASF motor 102 is rotated forward. Thus, the recording paper P is supplied from the paper cassette 21 to the printing unit 2 (S102).

  Subsequently, the PF motor 101 is rotated forward so that the supplied recording paper P is transported in the transport direction by the transport rollers 13 and 14, and the carriage motor 156 is driven to reciprocate the carriage 11 in the scanning direction. Printing is performed on the recording paper P by driving the inkjet head 12 and discharging ink from the plurality of nozzles 17 (S103). Then, after the printing is completed, the standby state is restored (S104). Specifically, the carriage motor 156 is driven to move the carriage 11 to a position where the ink discharge surface 12a faces the nozzle cap 61, and in this state, the ASF motor 102 is rotated in the forward direction, thereby the nozzle cap 61. Is raised from the uncapping position to the capping position. Further, the ASF motor 102 is rotated forward until the nozzle cap 61 reaches the capping position, and then the ASF motor 102 is stopped, so that the planetary gear 139b is kept in mesh with the crank gear 73.

  Here, when printing is performed, as described above, the gear meshed with the ASF switching gear 122 is switched until printing is started. Before switching the gear meshing with the ASF switching gear 122, as described above, the ASF motor 102 is driven, and the ASF switching gear 122 and the gear meshing with the ASF switching gear 122 are rotated in both directions by a minute angle. Make it easier to disengage between them. In the present embodiment, as described above, since the clutch gear 121 is interposed between the ASF motor 102 and the ASF switching gear 122, the time taken to switch the gear meshing with the ASF switching gear 122 is shortened. be able to. Thereby, the time until printing is started can be shortened.

(maintenance)
Next, maintenance using the maintenance unit 7 will be described. In the maintenance, as shown in FIG. 18, first, it is determined whether or not the flow path member 82 is fixed to the housing member 81 and the flow path member 82 cannot be rotated (S201). If the flow path member 82 is not fixed to the accommodation member 81 (S201: NO), the process proceeds to S203 as it is, and if the flow path member 82 is fixed to the accommodation member 81 (S201: YES). After performing the valve cleaning (S202), the process proceeds to S203. In S201, for example, when the ASF motor 102 is reversely rotated for a predetermined time in the standby state, the flow path member 82 does not rotate, so that the current flowing through the ASF motor 102 exceeds a predetermined threshold value. It is determined that the path member 82 is fixed to the housing member 81.

  In the valve cleaning, as shown in FIG. 16B, the suction pump 63 performs suction by rotating the PF motor 101 forward from the standby state. Then, the ink in the inkjet head 12 is discharged from the plurality of nozzles 17 and flows into the switching valve 62. As a result, the ink solidified in the switching valve 62 absorbs and dissolves the moisture of the ink that has flowed into the switching valve 62, and the sticking of the flow path member 82 to the housing member 81 is eliminated. Further, during suction by the suction pump 63, the ASF motor 102 is reversed to rotate the flow path member 82. Then, the ink that has flowed into the switching valve 62 is evenly distributed to each part within the switching valve 62. Thereby, the adhesion of the flow path member 82 to the housing member 81 can be efficiently eliminated. In FIG. 16B, a downward arrow is attached to the suction pump 63 to indicate that the suction pump 63 is in a shut-off state and performing suction. The same applies to FIGS. 16C to 16F described later.

  When the after-mentioned suction purge or idle suction is performed, the ink flows into the switching valve 62. If the ink that has flowed into the switching valve 62 is left for a long period of time, the ink may solidify and the flow path member 82 may adhere to the housing member 81. If the flow path member 82 is fixed to the housing member 81, the flow path member 82 may not be able to be rotated when performing a suction purge or empty suction described later. Therefore, in the present embodiment, sticking of the flow path member 82 to the housing member 81 is eliminated by performing valve cleaning as described above.

  In S203, suction purge is performed. More specifically, in S203, a black suction purge for discharging the thickened black ink in the inkjet head 12 and a color suction purge for discharging the thickened color ink in the inkjet head 12 are performed. Let it continue.

  In the black suction purge, with the nozzle cap 61 positioned at the capping position and the switching gears 112 and 122 positioned at the position shown in FIG. 12C, the ASF motor 102 is reversed to rotate the flow path member 82. By doing so, as shown in FIG. 16C, the cap communication port 84a and the pump communication port 84d are communicated, and the cap communication port 84b and the atmosphere communication port 84c are communicated. In this state, the PF motor 101 is rotated forward to cause the suction pump 63 to perform suction. As a result, the thickened black ink in the inkjet head 12 is discharged from the plurality of nozzles 17 forming the rightmost nozzle row 18. The cap communication port 84b and the atmosphere communication port 84c communicate with each other because the pressure in the cap portion 61b increases when the volume of the space in the cap portion 61b decreases due to the deformation of the nozzle cap 61 during suction. It is for suppressing.

  In the color suction purge, with the nozzle cap 61 positioned at the capping position and the switching gears 112 and 122 positioned at the position shown in FIG. 12C, the ASF motor 102 is reversed to rotate the flow path member 82. By doing so, as shown in FIG. 16D, the cap communication port 84b and the pump communication port 84d are communicated, and the cap communication port 84a and the atmosphere communication port 84c are communicated. In this state, the PF motor 101 is rotated forward to cause the suction pump 63 to perform suction. As a result, the thickened color ink in the inkjet head 12 is discharged from the plurality of nozzles 17 forming the left three nozzle rows 18. The cap communication port 84a and the atmosphere communication port 84c communicate with each other because the pressure increase in the cap portion 61a when the volume of the space in the cap portion 61a decreases due to the deformation of the nozzle cap 61 during suction. This is to suppress.

  Next, empty suction is performed to discharge ink accumulated in the nozzle cap 61 by suction purge (S204). More specifically, in S204, the black empty suction for discharging the black ink accumulated in the cap portion 61a by the black suction purge and the color ink accumulated in the cap portion 61b by the color suction purge are discharged. Continue to perform color empty suction.

  In the black idle suction, the ASF motor 102 is rotated forward and the crank gear 73 is rotated with the switching gears 112 and 122 positioned at the position shown in FIG. As shown, the nozzle cap 61 is lowered from the capping position to the intermediate position. Subsequently, by rotating the ASF motor 102 in the reverse direction and rotating the flow path member 82, as shown in FIG. 16E, the cap communication port 84a and the pump communication port 84d are communicated. In this state, the PF motor 101 is rotated forward to cause the suction pump 63 to perform suction. Thereby, the black ink collected in the cap part 61a is discharged.

  In the idle suction of the collar, as shown in FIG. 7A, the ASF motor 102 is rotated in the reverse direction with the nozzle cap 61 positioned at the intermediate position, and the flow path member 82 is rotated, so that FIG. As shown in f), the cap communication port 84b and the pump communication port 84d are communicated. In this state, the PF motor 101 is rotated forward to cause the suction pump 63 to perform suction. Thereby, the color ink accumulated in the cap part 61b is discharged.

  Unlike the present embodiment, when the nozzle cap 61 is lowered from the capping position to the uncapping position when performing the idle suction, the ink (between the nozzle cap 61 and the nozzle cap 61 when the nozzle cap 61 moves away from the ink ejection surface 12a). Bridge) is broken, and ink may spill from the nozzle cap 61. Therefore, in the present embodiment, when the idle suction is performed, the nozzle cap 61 is lowered to the intermediate position. Here, in the present embodiment, the height of the intermediate position is set so that the bridge is not broken even if the nozzle cap 61 is lowered to the intermediate position. Accordingly, it is possible to prevent the bridge from being broken and ink from spilling from the nozzle cap 61 during idle suction.

  Next, the wiper 59 wipes the ink adhering to the ink ejection surface 12a (S205). In order to perform wiping, the nozzle cap 61 is lowered to the uncapping position by rotating the ASF motor 102 forward and rotating the crank gear 73 as shown in FIG. 6B. Further, the wiper lifting device 157 is driven to raise the wiper 59. Then, the carriage motor 156 is driven to move the carriage 11 in the scanning direction. Thereby, the ink adhering to the ink discharge surface 12a is wiped off by the wiper 59. Here, when the nozzle cap 61 is located at the intermediate position, the distance between the nozzle cap 61 and the ink ejection surface 12a is smaller than when the nozzle cap 61 is located at the uncapping position. In this state, the carriage 11 is scanned. If moved in the direction, the ink discharge surface 12 a may come into contact with the nozzle cap 61. Therefore, in this embodiment, in order to prevent the ink discharge surface 12a from coming into contact with the nozzle cap 61, the nozzle cap 61 is lowered from the intermediate position to the uncapping position at the time of wiping.

  Next, flushing is performed to discharge ink or the like that has flowed in by wiping from the plurality of nozzles 17 (S206). In order to perform flushing, the carriage motor 156 is driven to return the carriage 11 to a position where the ink ejection surface 12a faces the nozzle cap 61, and then the ASF motor 102 is rotated forward to rotate the crank gear 73. By rotating, the nozzle cap 61 is raised to an intermediate position as shown in FIG. In this state, the inkjet head 12 is caused to eject ink from the plurality of nozzles 17 toward the nozzle cap 61.

  Here, unlike the present embodiment, it is conceivable that the nozzle cap 61 is left in the uncapping position during flushing. However, in this case, there is a possibility that the ink ejected from the nozzles 17 by the flushing will bounce off the nozzle cap 61 and jump out of the nozzle cap 61. Therefore, in the present embodiment, the nozzle cap 61 is positioned at an intermediate position closer to the ink ejection surface 12a than the uncapping position during flushing. Thereby, it is possible to prevent the ink ejected from the nozzle 17 by the flushing from splashing out of the nozzle cap 61 and jumping out of the nozzle cap 61.

  Next, in order to discharge the ink accumulated in the nozzle cap 61 by the flushing, idle suction similar to S204 is performed (S207). Then, after the completion of the idle suction in S207, the ASF motor 102 is rotated forward, and the nozzle cap 61 is moved to the capping position as shown in FIG. 6A to return to the above-described standby state (S208). . Also at this time, the ASF motor 102 is rotated forward until the nozzle cap 61 reaches the capping position, and then the ASF motor 102 is stopped, so that the planetary gear 139b is kept engaged with the crank gear 73. Thus, the maintenance is completed.

  Here, the printer 1 is required to shorten the time required to move the nozzle cap 61 from the capping position to the uncapping position as much as possible in order to minimize the time from the standby state to the start of printing. Is done. On the other hand, in the present embodiment, the planetary gear 139b is movable between a position where it is engaged with the crank gear 73 and a position where it is engaged with the valve drive gear 134a. Therefore, if an external force is applied to the planetary gear 139b in a state where the planetary gear 139b is engaged with the crank gear 73, the engagement of the planetary gear 139b with the crank gear 73 may be released.

  When the meshing of the planetary gear 139b with the crank gear 73 is released, the planetary gear 139b moves to a position where the planetary gear 139b meshes with the crank gear 73 when the ASF motor 102 is driven to move the nozzle cap 61 from the capping position to the uncapping position. From this point, the rotation of the crank gear 73, that is, the lowering of the nozzle cap 61 is started. In this case, since the nozzle cap 61 does not descend until the planetary gear 139b moves to the position where it engages with the crank gear 73, the time required to move the nozzle cap 61 from the capping position to the uncapping position accordingly. Will become longer. As a result, it takes a long time to start printing.

  In the present embodiment, the planetary gear 139b meshes with the crank gear 73 from below, and therefore the meshing of the planetary gear 139b with the crank gear 73 is likely to be disengaged due to the influence of gravity.

  In the present embodiment, a clutch gear 121 is interposed between the ASF motor 102 and the ASF switching gear 122. As a result, as described above, the time required for switching the gear meshing with the ASF switching gear 122 is shortened, and the time until printing is started can be shortened. However, if the clutch gear 121 is interposed between the ASF motor 102 and the ASF switching gear 122, when the gear 121a and the gear 121b rotate relative to each other within the range of play in the clutch gear 121, the planetary gear. The meshing with the crank gear 73 of 139b is easy to come off. When the planetary gear 139b is disengaged from the crank gear 73, as described above, the time until the printing is started becomes long.

  Therefore, in the present embodiment, the crank gear 73 is made of a synthetic resin material containing glass fibers. As a result, the maximum frictional force between the planetary gear 139b and the crank gear 73 becomes larger than when both the crank gear 73 and the planetary gear 139b are made of a synthetic resin material that does not contain glass fiber, and the planetary gear It is possible to make it difficult to disengage the gear 139b from the crank gear 73. As a result, the time taken to move the nozzle cap 61 from the capping position to the uncapping position can be shortened.

  Here, unlike this embodiment, instead of the crank gear 73, the planetary gear 139b may be made of a synthetic resin material containing glass fiber. However, in this case, the planetary gear 139b and the valve drive gear 134a are disposed between the planetary gear 139b and the valve drive gear 134a as compared to the case where both the planetary gear 139b and the valve drive gear 134a are made of a synthetic resin material that does not contain glass fiber. The maximum frictional force is increased, and the planetary gear 139b and the valve drive gear 134a are not easily disengaged. When the planetary gear 139b is moved from the position where it is engaged with the valve drive gear 134a to the position where it is engaged with the crank gear 73, the ASF motor 102 is driven to alternately rotate the planetary gear 139b and the valve drive gear 134a by a minute angle in both directions. This facilitates the disengagement between the planetary gear 139b and the valve drive gear 134a. However, if the engagement between the planetary gear 139b and the valve drive gear 134a is difficult to disengage, the number of times this operation is performed increases, and the planetary gear 139b moves. It takes a long time to start.

  Therefore, in the present embodiment, the crank gear 73 is made of a synthetic resin material containing glass fiber, and the planetary gear 139b and the valve drive gear 134a are made of a synthetic resin material not containing glass fiber. It is supposed to be. As a result, it is possible to prevent the meshing between the planetary gear 139b and the valve drive gear 134a from becoming difficult to disengage.

  In the present embodiment, the ASF motor 102 is rotated forward, the nozzle cap 61 is moved to the capping position, and then the ASF motor 102 is stopped so that the planetary gear 139b is engaged with the crank gear 73. To maintain. As a result, when the ASF motor 102 is rotated forward when the nozzle cap 61 is moved from the capping position to the uncapping position during the next printing, the nozzle cap 61 starts to descend immediately. As a result, the time required to move the nozzle cap 61 from the capping position to the uncapping position can be shortened.

  Next, modified examples in which various modifications of the present embodiment are added will be described. In addition, about the same structure as this Embodiment among the structures of a modification, the code | symbol same as this Embodiment is used, and description is also abbreviate | omitted suitably.

  In the above-described embodiment, of the crank gear 73 and the planetary gear 139b that can mesh with each other, only the crank gear 73 is made of a synthetic resin material containing glass fiber, and the planetary gear 139b does not contain a glass fiber. Although it is made of a resin material, it is not limited to this.

  In the first modification, as shown in FIG. 19A, the planetary gear 139b is made of a synthetic resin material containing glass fibers, and the crank gear 73 and the valve drive gear 134a are synthetic resin materials not containing glass fibers. It is constituted by. Even in this case, as in the above-described embodiment, the crank gear 73 and the planetary gear 139b are compared with the case where both the crank gear 73 and the planetary gear 139b are made of a synthetic resin material not containing glass fiber. It is possible to make it difficult to disengage.

  In the second modification, as shown in FIG. 19B, the crank gear 73 and the planetary gear 139b are made of a synthetic resin material containing glass fiber, and the valve drive gear 134a is a synthetic resin material containing no glass fiber. It is constituted by. In this case, as in the above-described embodiment and Modification 1, only one of the crank gear 73 and the planetary gear 139b is made of a synthetic resin material containing glass fiber. It is possible to make it difficult to disengage the crank gear 73 and the planetary gear 139b.

  Further, in the above-described embodiment and Modifications 1 and 2, the valve drive gear 134a is made of a synthetic resin material that does not contain glass fiber, but is not limited thereto.

  In Modification 3, as shown in FIG. 19C, the crank gear 73 and the valve drive gear 134a are made of a synthetic resin material containing glass fiber, and the planetary gear 139b is a synthetic resin material containing no glass fiber. It is constituted by.

  In Modification 4, as shown in FIG. 19 (d), the planetary gear 139b and the valve drive gear 134a are made of a synthetic resin material containing glass fiber, and the crank gear 73 is a synthetic resin material containing no glass fiber. It is constituted by.

  In the modified example 5, as shown in FIG. 19 (e), the crank gear 73, the planetary gear 139b and the valve drive gear 134a are all made of a synthetic resin material containing glass fiber.

  In Modifications 3 to 5, as in the above-described embodiment and Modifications 1 and 2, it is possible to make it difficult for the crank gear 73 and the planetary gear 139b to disengage.

  However, as in the first to fifth modifications, when at least one of the planetary gear 139b and the valve drive gear 134a is made of a synthetic resin material containing glass fiber, the above-described embodiment is used. As compared with the above, the engagement between the valve drive gear 134a and the planetary gear 139b is less likely to come off.

  Further, as in Modifications 2 to 5, when two or more of the crank gear 73, the valve drive gear 134a, and the planetary gear 139b are made of a synthetic resin material containing glass fiber, glass fiber is contained. The glass fiber content may be the same or different from each other.

  However, when the crank gear 73 and the planetary gear 139b are both made of a synthetic resin material containing glass fiber as in the second and fifth modifications, as shown in FIG. It is preferable that the glass fiber content R1 in 73 is higher than the glass fiber content R2 in the planetary gear 139b.

  In a gear made of a synthetic resin material containing glass fibers, the higher the glass fiber content, the greater the dynamic friction coefficient. For example, Novalloy (registered trademark) B2504 manufactured by Daicel Polymer Co., Ltd., which is an ABS / PBT resin containing 20% by mass of glass fiber, has a dynamic friction coefficient of about 0.32. In contrast, in Novalloy (registered trademark) B2509 manufactured by Daicel Polymer Co., Ltd., which is an ABS / PBT resin containing 45% by mass of glass fiber, the dynamic friction coefficient for the same material is about 0.36. Further, as described above, in Duracon (registered trademark) GH20 manufactured by Polyplastics Co., Ltd., which is a POM resin containing 20% by mass of glass fiber, the dynamic friction coefficient with respect to carbon steel is about 0.55. On the other hand, in Duracon (registered trademark) GH25 manufactured by Polyplastics Co., Ltd., which is a POM resin containing 25% by mass of glass fiber, the dynamic friction coefficient with respect to carbon steel is about 0.60.

  Therefore, if the glass fiber content R1 in the crank gear 73 is made higher than the glass fiber content R2 in the planetary gear 139b, the valve drive gear is prevented from being disengaged between the crank gear 73 and the planetary gear 139b. The meshing between 134a and the crank gear 73 can be made as easy as possible.

  Further, when both the crank gear 73 and the valve drive gear 134a are made of a synthetic resin material containing glass fiber as in the modified examples 3 and 5, as shown in FIG. The glass fiber content R3 in the gear 73 is preferably higher than the glass fiber content R4 in the valve drive gear 134a.

  As described above, in a gear made of a synthetic resin material containing glass fibers, the higher the glass fiber content, the larger the dynamic friction coefficient. Therefore, if the glass fiber content R3 in the crank gear 73 is made higher than the glass fiber content R4 in the valve drive gear 134a, the valve gear is driven while making it difficult to disengage the crank gear 73 and the planetary gear 139b. The meshing between the gear 134a and the crank gear 73 can be made as easy as possible.

  In the above-described embodiment, the clutch gear 121 configured to be able to mesh with the ASF switching gear 122 is provided between the ASF switching gear 122 and the ASF motor 102. However, the present invention is not limited to this. The clutch gear may be configured to be interposed between the ASF switching gear 122 and the ASF motor 102 and connectable to the ASF switching gear 122 via another gear. Alternatively, the clutch gear is a gear that is interposed between the ASF switching gear 122 and the sun gear 139a. Among the gears that are interposed between the ASF motor 102 and the crank gear 73, the crank gear is more crankable than the ASF switching gear 122. A 73-side gear may also be used. Furthermore, the clutch gear may not be interposed between the ASF motor 102 and the crank gear 73.

  In the above-described embodiment, the planetary gear 139b is engaged with the crank gear 73 from below, but the present invention is not limited to this. The planetary gear 139b may be engaged with the crank gear 73 from the horizontal direction, or may be engaged with the crank gear 73 from above. Even in these cases, it is possible to prevent the planetary gear 139b from being detached from the crank gear 73 when an external force in a direction away from the crank gear 73 is applied to the planetary gear 139b due to some factor.

  In the above-described embodiment, the planetary gear 139b can mesh with the crank gear 73 connected to the slide cam 72. However, the present invention is not limited to this. The planetary gear 139b may be connectable to the crank gear 73 via another gear. In this case, the other gear corresponds to the “first transmission gear” of the present invention.

  In the above-described embodiment, the valve drive gear 134a that can mesh with the planetary gear 139b is connected to the valve cam 85 via another gear that constitutes the valve drive gear group 134. I can't. The planetary gear 139b may be configured to mesh with a gear directly connected to the valve cam 85. In this case, the gear directly connected to the valve cam 85 corresponds to the “second transmission gear” of the present invention.

  Further, in the above-described embodiment, the planetary gear 139b can move between a position where it engages with the crank gear 73 for raising and lowering the nozzle cap 61 and a position where it engages with the valve drive gear 134a for rotating the valve cam 85. However, it is not limited to this. The planetary gear 139b is movable between a position where it engages with the crank gear 73 and a position where it engages with a gear for transmitting power to a driven device other than the valve cam 85 ("second transmission gear" of the present invention). It may be.

  In the above-described embodiment, the planetary gear 139b is guided by the sun gear 139a and the connecting member 139c so as to move between a position engaging with the crank gear 73 and a position engaging with the valve drive gear 134a. However, it is not limited to this. The planetary gear 139b may be guided by a guide unit having a configuration different from that of the above-described embodiment.

  In the above-described embodiment, the planetary gear 139b rotates around the axis of the sun gear 139a in accordance with the rotation direction of the sun gear 139a (the rotation direction of the ASF motor 102). Although it was movable between the meshing position and the meshing position with the valve drive gear 134a, it is not limited to this. Due to a configuration different from the planetary gear mechanism 139, the ASF motor 102 moves in different directions depending on the rotation direction of the ASF motor 102, and is movable between a position engaging with the crank gear 73 and a position engaging with the valve drive gear 134a. A configured gear (the “moving gear” of the present invention) may be provided. Also in this case, when the moving gear moves between the two positions, it is guided by a guide portion having a configuration different from that of the sun gear 139a and the connecting member 139c of the above-described embodiment.

  In the above-described embodiment, the cap lifting device 70 is driven by the power from the ASF motor 102. However, the present invention is not limited to this. For example, the cap lifting device 70 may be driven by a motor other than the ASF motor, such as the PF motor 101.

  In addition, the configuration of the cap lifting device for lifting the nozzle cap 61 is not limited to the configuration of the cap lifting device 70 of the above-described embodiment. The nozzle cap 61 may be moved up and down by a device having a configuration different from that of the cap lifting device 70.

  Further, as shown in FIG. 21, the printer 200 according to the modified example 6 includes a paper feed roller 222 for transporting the recording paper P stored in the paper cassette 21, and a recording paper P transported from the paper feed roller 222. It has a driving roller 213a and a driven roller 213b. Both the paper feed roller 222 and the drive roller 213a are driven by the motor 201. The motor 201 is connected to the intermediate gear 238, and power is transmitted from the motor 201 to the intermediate gear 238. The intermediate gear 238 meshes with the sun gear 239a, and the sun gear 239a meshes with the planetary gear 239b. The driving roller 213a is connected to the roller driving gear 250 via the intermediate gear 248, and the paper feeding roller 222 is connected to the paper feeding driving gear 270 via the intermediate gear 268. The roller drive gear 250 is disposed above the paper feed drive gear 270, and the drive gear 250 and the paper feed drive gear 270 are disposed so as to sandwich the planetary gear 239b in the vertical direction. The planetary gear 239b can move in the vertical direction. The planetary gear 239b moves upward to mesh with the roller drive gear 250, and the planetary gear 239b moves downward to mesh with the paper feed drive gear 270. The motor 201 and the intermediate gear 238 may be configured to transmit power through a plurality of gears. In FIG. 21, the configuration between the motor 201 and the intermediate gear 238 is omitted.

  The dynamic friction coefficient between the roller drive gear 250 and the planetary gear 239b is larger than the dynamic friction coefficient between the paper feed drive gear 270 and the planetary gear 239b. Specifically, the roller drive gear 250 is made of a synthetic resin material containing glass fiber as described above. On the other hand, the planetary gear 239b and the paper feed drive gear 270 are made of a synthetic resin material such as polyacetal resin that does not contain glass fiber.

  For example, when the printer 200 receives print data having a large data size from a PC or a tablet terminal and executes printing, the printer 200 may wait for reception of print data during printing. In that case, it is desirable that the motor 201 and the driving roller 213a maintain a state in which power can be transmitted so that printing can be resumed promptly after receiving necessary print data. In the printer 200, the planetary gear 239 b is positioned below the roller driving gear 250 due to the layout of the driving roller 213 a and the paper feeding roller 222. Therefore, the planetary gear 239b may come off from the roller drive gear 250 when vibration is applied to the printer 200 or the like. However, in the printer 200, since the planetary gear 239b is made of a synthetic resin material containing glass fiber, the coefficient of dynamic friction between the planetary gear 239b and the roller drive gear 250 increases, and the planetary gear 239b is disengaged from the roller drive gear 250. Hateful.

  Further, when transporting the recording paper P, the planetary gear 239b meshes with the paper feed drive gear 270 to drive the paper feed roller 222, and then quickly switches the planetary gear 239b to mesh with the roller drive gear 250. it can. The paper feed drive gear 270 is positioned below the planetary gear 239b and cannot be removed when the paper feed drive gear 270 and the planetary gear 239b are engaged with each other. Also, when printing print data with a large data size, usually, a part of the recording paper P is often located below the inkjet head 12, and the paper feed roller 222 is used when resuming printing. There are few cases to do. Therefore, the paper feed drive gear 270 can be quickly disengaged from the planetary gear 239b, and switching of power transmission during printing can be realized quickly.

  In Modification 6, only the roller drive gear 250 is made of a synthetic resin material containing glass fiber, but is not limited thereto. For example, both the roller drive gear 250 and the planetary gear 239b may be made of a synthetic resin material containing glass fiber, and the paper feed drive gear 270 may be made of a synthetic resin material not containing glass fiber.

  Further, as shown in FIG. 22, the printer 300 according to the modified example 7 includes two paper cassettes 320 and 321 that store the recording paper P arranged in the vertical direction, and the paper cassette 320 is recorded by the paper feed roller 323. The paper P is fed, and the paper cassette 321 is fed with the recording paper P by the paper feed roller 322. The printer 300 is configured to selectively drive the paper feed roller 322 and the paper feed roller 323 by the PF motor 101. The paper feed roller 322 is connected to a paper feed drive gear 370 via a belt 372 and an intermediate gear 317. The paper feed roller 323 is connected to the paper feed drive gear 380 via the belt 384. The paper feed drive gear 370 is disposed above the paper feed drive gear 380. Furthermore, the printer 300 includes a sun gear 339a driven by the PF motor 101 and a planetary gear 339b that meshes with the sun gear 339a. The planetary gear 339b is located between the paper feed drive gear 370 and the paper feed drive gear 380 in the vertical direction. When paper is fed from the recording paper P stored in the paper cassette 321, the PF motor 101 is driven to drive the paper feed roller 322 while the planetary gear 339 b is engaged with the paper feed drive gear 370. When paper is fed from the recording paper P stored in the paper cassette 320, the paper feed roller 323 is driven by driving the PF motor 101 with the planetary gear 339b engaged with the paper feed drive gear 380. Note that the printer 300 in FIG. 22 shows only a part of the configuration, and illustrations of portions common to the above embodiment are omitted. Although not shown in FIG. 22, the paper feed drive gears 370 and 380 are arranged so as to be shifted in the scanning direction so as not to interfere with the recording paper P, and ribs or the like that form a conveyance path for the recording paper P are appropriately provided. It is provided.

  For example, when the paper cassette 321 of the two paper cassettes 320 and 321 is designed as a standard cassette, the paper feed drive gear 370 connected to the paper feed roller 322 is made of a synthetic resin material containing glass fibers. The planetary gear 339b and the paper feed drive gear 380 are made of a synthetic resin material that does not contain glass fiber.

  Therefore, the dynamic friction coefficient between the planetary gear 339b and the paper feed drive gear 370 is larger than the dynamic friction coefficient between the planetary gear 339b and the paper feed drive gear 380. Thus, the printer 300 can easily maintain the state in which the planetary gear 339b is engaged with the paper feed drive gear 370 when the printer 300 is on standby without performing printing.

In the modified example 7, only the paper feed drive gear 370 is made of a synthetic resin material containing glass fiber, but is not limited thereto. For example, the planetary gear 339b and the paper feed drive gear 370 may both be made of a synthetic resin material containing glass fiber, and the paper feed drive gear 380 may be made of a synthetic resin material not containing glass fiber.

  In the above description, an example in which the present invention is applied to a printer that prints on recording paper by discharging ink from nozzles has been described. However, the present invention is not limited to this. The present invention can also be applied to a liquid ejecting apparatus other than a printer that ejects a liquid other than ink.

  Further, although an example in which the present invention is applied to a printer has been described, the present invention is not limited to this. The present invention can be applied to any apparatus having a power transmission mechanism that selectively drives one motor and two driven objects.

DESCRIPTION OF SYMBOLS 1 Printer 12 Inkjet head 17 Nozzle 61 Nozzle cap 62 Switching valve 70 Cap raising / lowering device 73 Crank gear 102 ASF motor 121 Clutch gear 121a, 121b Gear 134a Valve drive gear 139b Planetary gear 150 Control device

Claims (14)

A liquid ejection head having a plurality of nozzles and a liquid ejection surface on which the plurality of nozzles are formed;
A cap for covering the plurality of nozzles in contact with the liquid ejection surface;
A cap moving device that moves the cap between a capping position that contacts the liquid ejection surface and covers the plurality of nozzles, and an uncapping position away from the liquid ejection surface;
A motor for driving the cap moving device;
A driven device that is driven by the motor and is different from the cap moving device;
A first transmission gear connected to the cap moving device for transmitting the power of the motor to the cap moving device;
A second transmission gear connected to the driven device for transmitting the power of the motor to the driven device;
A moving gear that is connected to the motor and moves between a position that meshes with the first transmission gear and a position that meshes with the second transmission gear according to the rotation direction of the motor;
At least one of the first transmission gear and the moving gear is made of a synthetic resin material containing glass fiber. A liquid ejection head having a plurality of nozzles and a liquid ejection surface on which the plurality of nozzles are formed;
A cap for covering the plurality of nozzles in contact with the liquid ejection surface;
A cap moving device that moves the cap between a capping position that contacts the liquid ejection surface and covers the plurality of nozzles and an uncapping position that is remote from the liquid ejection device;
A motor for driving the cap moving device;
A driven device that is driven by the motor and is different from the cap moving device;
A first transmission gear for transmitting the power of the motor to the cap moving device;
A second transmission gear for transmitting the power of the motor to the driven device;
A motive power is transmitted from the motor, and a moving gear that moves so as to selectively mesh with either the first transmission gear or the second transmission gear according to the rotation direction of the motor,
The maximum frictional force between the gears when the first transmission gear and the moving gear mesh with each other is greater than the maximum frictional force between the gears when the second transmission gear and the moving gear mesh with each other. A liquid ejecting apparatus characterized by being large. The first transmission gear is made of a synthetic resin material containing glass fiber;
3. The liquid ejection device according to claim 1, wherein the second transmission gear and the moving gear are made of a synthetic resin material that does not contain glass fiber. 4.   3. The liquid ejection device according to claim 1, wherein both the first transmission gear and the moving gear are made of a synthetic resin material containing glass fiber. 4.   5. The liquid ejection device according to claim 4, wherein the glass fiber content in the first transmission gear is higher than the glass fiber content in the moving gear. Of the first transmission gear and the moving gear, at least the first transmission gear is made of a synthetic resin material containing glass fiber,
The second transmission gear is made of a synthetic resin material containing glass fiber,
3. The liquid ejection device according to claim 1, wherein a content ratio of the glass fiber in the first transmission gear is higher than a content ratio of the glass fiber in the second transmission gear. A guide unit for guiding the moving gear;
The liquid ejecting apparatus according to claim 1, wherein the guide portion guides the moving gear so as to mesh with the first transmission gear from below.   A clutch gear interposed between the motor and the moving gear, wherein the first gear to which power is transmitted from the motor is disposed coaxially with the first gear, and is free from play in the rotational direction with the first gear. The liquid ejecting apparatus according to claim 1, further comprising a clutch gear having a second gear connected to the movable gear. A control device for controlling the motor;
The controller is
By rotating the motor in a direction in which the moving gear meshes with the first transmission gear, the power of the motor is transmitted to the cap moving device, and the cap is moved to the capping position,
9. When the cap reaches the capping position, the moving gear is maintained in mesh with the first transmission gear by stopping the motor. The liquid discharge apparatus according to 1. A motor,
A first driven device driven by the motor;
A second driven device driven by the motor;
A first transmission gear connected to the first driven device for transmitting the power of the motor to the first driven device;
A second transmission gear connected to the second driven device for transmitting the power of the motor to the second driven device;
A moving gear that is connected to the motor and moves between a position that meshes with the first transmission gear and a position that meshes with the second transmission gear according to the rotation direction of the motor;
The maximum frictional force between the gears when the first transmission gear and the moving gear mesh with each other is greater than the maximum frictional force between the gears when the second transmission gear and the moving gear mesh with each other. A power transmission device characterized by being large. A guide unit for guiding the moving gear;
The power transmission device according to claim 10, wherein the guide portion guides the moving gear so as to mesh with the first transmission gear from below. The first transmission gear is positioned above the second transmission gear;
The power transmission device according to claim 11, wherein the guide portion is positioned between the first transmission gear and the second transmission gear in a vertical direction. A storage section for storing a recording medium;
A supply mechanism for taking out the recording medium stored in the storage unit from the storage unit;
A transport mechanism for transporting the recording medium taken out by the supply mechanism in the transport direction so as to face a recording head for recording on the recording medium;
A power transmission mechanism according to any one of claims 10 to 12,
The transport mechanism is the first driven device;
The recording apparatus, wherein the paper feed mechanism is the second driven device. A recording head for recording on a recording medium;
A first accommodating portion for accommodating a recording medium;
A second accommodating portion for accommodating a recording medium;
A first supply mechanism for taking out a recording medium stored in the first storage unit from the first storage unit;
A second supply mechanism for taking out the recording medium stored in the second storage unit from the second storage unit;
A power transmission mechanism according to any one of claims 10 to 12,
The first supply mechanism is the first driven device;
The recording apparatus, wherein the second supply mechanism is the second driven apparatus.

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