JP2018103434A - Inkjet recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inkjet recording device, which can accurately reciprocate a carriage.SOLUTION: The inkjet recording device comprises a first inkjet head, a second inkjet head, a carriage, a first sub tank, a second sub tank, a movement part, a support part, and an elevating part. The first sub tank is provided upper than the first inkjet head, on a base part of the carriage, and the second sub tank is provided upper than the second inkjet head, on the base part. The movement part reciprocates the carriage. The support part connects the carriage to the movement part, and reciprocates in a main scanning direction in which the carriage is reciprocated. The elevating part is provided in the support part to be positioned upper than the base part and moves the carriage in a vertical direction. The elevating part comprises an elevating shaft part provided to extend along the vertical direction, and is connected to the carriage, with the elevating shaft part arranged between the first sub tank and the second sub tank in the main scanning direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an ink jet recording apparatus.

  A technique related to an ink jet recording apparatus has been proposed. For example, Patent Document 1 discloses an ink jet printer. The ink jet printer includes an apparatus main body, a feeding mechanism, and a winding mechanism. The apparatus main body is provided with a carriage and a carriage moving mechanism. The carriage is movably supported by the guide rail and is driven by a carriage moving mechanism. The carriage is provided with four printer heads and four subtanks corresponding to cyan, magenta, yellow, and black. The carriage moving mechanism includes a drive pulley and a driven pulley, a carriage drive motor, and a timing belt. The carriage is connected and fixed to the timing belt. By rotating the carriage drive motor, the carriage supported by the guide rail is moved left and right above the platen. The four subtanks are connected to the corresponding color printer head. UV ink is supplied to the sub tank from the main tank.

  Patent Document 2 discloses an ink jet recording apparatus. The ink jet recording apparatus includes a belt conveyance unit, a head unit, and an ink supply system. In the head unit, four droplet discharge heads are arranged on the carriage. The droplet discharge head is a line head. On the carriage, a sub tank is provided adjacent to the four droplet discharge heads. The sub tank is provided at a position higher than the four droplet discharge heads. A predetermined amount of ink supplied from the ink supply system is stored in the sub tank. The sub tank is connected to each droplet discharge head by four ink supply paths. The ink supply system has an ink tank and a supply pipe. The supply pipe connects an ink tank that is an ink supply source and a sub tank so that ink can be supplied.

  The applicant has proposed a technique relating to an ink jet recording apparatus in Patent Document 3. That is, in Patent Document 3, the ink jet recording apparatus includes a transport unit, a head carriage, and a head carriage moving unit. Cyan, magenta, yellow, and black recording heads are attached to the head carriage. The head carriage is attached to the head carriage frame via a first head carriage lifting ball screw and a second head carriage lifting ball screw. A first lifting motor is connected to the first head carriage lifting ball screw. A second raising / lowering motor is coupled to the second head carriage raising / lowering ball screw. When the first elevating motor and the second elevating motor are rotated to one side, the head carriage is raised, and when the first elevating motor is rotated to the other side, the head carriage is lowered. The head carriage is supported by guide rails. The guide rail is arranged in the main scanning direction. The head carriage moving unit reciprocates the head carriage in the main scanning direction along the guide rail.

  In addition, the applicant has also proposed a technique related to an ink jet recording apparatus in Patent Document 4 and Patent Document 5. In Patent Document 4, the ink jet recording apparatus includes a recording unit and a second moving unit. In Patent Document 5, the ink jet recording apparatus includes a recording unit and a moving unit. The recording unit includes yellow, magenta, cyan, and black ink jet heads, and each color ink jet head is mounted on a carriage. The ink jet head is a line type ink jet head. The second moving unit or the moving unit moves the recording unit in the vertical direction. In Patent Document 5, when the ink jet recording apparatus is a serial type, the moving unit is omitted.

JP 2012-210824 A JP 2010-158783 A JP 2011-73271 A JP 2013-208874 A International Publication No. 2013/161622

  The ink jet recording apparatus can record a predetermined pattern on a recording medium with high quality. As an ink jet recording apparatus, an ink jet recording apparatus of a type in which a carriage is reciprocated in the main scanning direction during pattern recording has been put into practical use. In an inkjet recording apparatus used in the industrial field, a predetermined pattern is recorded on various recording media. The thickness of the recording medium is not constant, and one inkjet recording apparatus must cope with a plurality of types of recording media having different thicknesses. For this reason, in an ink jet recording apparatus used in the industrial field, an elevating unit may be provided. The elevating unit moves the carriage in the vertical direction. Accordingly, the interval between the surface on which the recording medium is placed and the ejection surface is adjusted in the ink jet recording apparatus. By this adjustment, the gap between the surface of the recording medium and the ejection surface is made a gap suitable for high quality pattern recording. An ink jet head is mounted on the carriage. The ejection surface is the surface of the inkjet head on which nozzles that eject ink are formed. In an inkjet recording apparatus used in the industrial field, an inkjet head and a carriage are extremely large and heavy, for example, as compared with an inkjet recording apparatus for home use. Further, a sub tank is provided on the carriage. The sub tank stores ink supplied from the main tank and supplied to the inkjet head.

  Therefore, in an ink jet recording apparatus used in the industrial field, when a carriage provided with an ink jet head and a sub tank is reciprocated in the main scanning direction, for example, the carriage easily vibrates or shakes during the movement. . As a result, it is assumed that the movement accuracy of the carriage in the main scanning direction is lowered and it becomes difficult to record a high quality pattern.

  An object of the present invention is to provide an ink jet recording apparatus that can reciprocate a carriage with high accuracy.

  One aspect of the present invention is a first inkjet head that ejects a first ink onto a recording medium, a second inkjet head that ejects a second ink onto the recording medium, the first inkjet head, and the second inkjet head. A carriage having a base portion on which the first ink jet head is mounted, and provided on the base portion above the first ink jet head, supplied from a first main tank for storing the first ink, and supplied to the first ink jet head. A first sub-tank for storing the first ink, and a second sub-tank that is provided above the second ink-jet head on the base portion and is supplied from the second main tank for storing the second ink. The second sub tank that stores the supplied second ink and the carriage are reciprocated. A moving part that connects the carriage and the moving part, a support part that reciprocates with the carriage in a main scanning direction in which the carriage reciprocates by the moving part, and a state above the base part An elevating unit provided on the support unit for moving the carriage in the vertical direction, and the elevating unit includes an elevating shaft unit provided in a state along the vertical direction, and the elevating shaft unit is the main scan The inkjet recording apparatus is connected to the carriage while being disposed between the first sub tank and the second sub tank in a direction.

  According to this ink jet recording apparatus, the first sub tank, the second sub tank, and the elevating part can be compactly arranged in a direction orthogonal to the main scanning direction. The carriage can be reduced in size in a direction orthogonal to the main scanning direction.

  In the ink jet recording apparatus, the first sub tank is provided above the first ink jet head on the base portion, and the second sub tank is provided above the second ink jet head on the base portion. It may be. According to this configuration, the first inkjet head, the second inkjet head, the first sub tank, the second sub tank, and the elevating part can be compactly arranged in a direction orthogonal to the main scanning direction.

  In the ink jet recording apparatus, the support portion is connected to the carriage in a state of being provided in the main body portion and connected to the moving portion, and guides movement of the carriage in the vertical direction by the elevating portion. And a guide unit that performs the above-described operation. In this case, the guide portion is provided with a guide rail provided in the main body portion in a state along the vertical direction, and a block that is connected to the carriage and moves along the guide rail in a state of being engaged with the guide rail. May be provided. According to this configuration, the carriage can be smoothly moved in the vertical direction by the elevating unit.

  According to the present invention, an ink jet recording apparatus capable of accurately reciprocating the carriage can be obtained.

It is a perspective view which shows an example of schematic structure of an inkjet recording device. It is a perspective view which shows an example of schematic structure of an inkjet recording device. A state in which the carriage is arranged above the position in the vertical direction shown in FIG. 1 corresponding to the thickness of the recording medium is shown. FIG. 4 is a side view illustrating a vertical positional relationship between a conveyance surface of a conveyance unit, a surface of a recording medium, and an ejection surface of an inkjet head. The portion of the ink jet recording apparatus in the first state corresponds to a state in which the ink jet recording apparatus shown in FIG. 1 is viewed from the second side to the first side in the main scanning direction. The portion of the ink jet recording apparatus in the second state corresponds to a state in which the ink jet recording apparatus shown in FIG. 2 is viewed from the second side in the main scanning direction to the first side. Of the components included in the ink jet recording apparatus, illustration of some components including the moving unit is omitted. It is a perspective view which abbreviate | omits one part structure and shows the other example of schematic structure of an inkjet recording device. It is a perspective view which abbreviate | omits one part structure and shows another example of schematic structure of an inkjet recording device.

  Embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to the configurations described below, and various configurations can be employed in the same technical idea. For example, some of the configurations shown below may be omitted or replaced with other configurations. Other configurations may be included.

<Inkjet recording apparatus>
The ink jet recording apparatus 10 will be described with reference to FIGS. In the ink jet recording apparatus 10, the recording medium 15 is intermittently conveyed, and a predetermined pattern is recorded on the recording medium 15. Pattern recording is required for various recording media 15. For this reason, the inkjet recording apparatus 10 is required to support recording media 15 having various thicknesses, for example. That is, the inkjet recording apparatus 10 can record a predetermined pattern on various recording media 15 having different thicknesses. Examples of the recording medium 15 include fabrics and building materials. In the embodiment, the recording medium 15 is long. The recording medium may be short. The ink colors used for pattern recording are black, magenta, yellow, and cyan. The ink color may be a color other than these. The number of ink colors may be 3 colors or less or 5 colors or more. The inkjet recording apparatus 10 includes a transport unit 20, inkjet heads 30K, 30M, 30Y, and 30C, a carriage 40, a support unit 50, main tanks 60K, 60M, 60Y, and 60C, and supply channels 61K, 61M, and 61Y. , 61C, sub tanks 62K, 62M, 62Y, 62C, connection flow paths 63K, 63M, 63Y, 63C, a moving part 70, and an elevating part 80.

  The transport unit 20 transports the recording medium 15. In the embodiment, the direction in which the recording medium 15 is transported by the transport unit 20 is referred to as “transport direction”. In the inkjet recording apparatus 10, the recording medium 15 is transported intermittently by the transport unit 20. The conveyance unit 20 is a belt conveyor. The transport unit 20 includes a pair of transport rollers 21 and 22, an endless belt 23, and a first motor 25. The transport roller 21 is provided downstream of the carriage 40 in the transport direction. The conveyance roller 22 is provided upstream of the carriage 40 in the conveyance direction. The endless belt 23 is an annular belt. The endless belt 23 is stretched over the transport rollers 21 and 22 in a state where tension is applied. In a state where the endless belt 23 is stretched over the transport rollers 21 and 22, the transport surface 24 is in a horizontal state between the transport rollers 21 and 22. The conveying surface 24 is formed by the outer peripheral surface of the endless belt 23. The recording medium 15 is placed on the transport surface 24. The first motor 25 is connected to the transport roller 21. As the first motor 25, for example, a servo motor with an encoder is employed. The first motor 25 rotates the transport roller 21 in a direction corresponding to the transport direction. The endless belt 23 rotates in a direction corresponding to the transport direction as the transport roller 21 rotates. The conveyance roller 22 rotates in a direction corresponding to the conveyance direction following the rotation of the endless belt 23. In FIG. 1 and FIG. 2, the arrows shown inside the transport rollers 21 and 22 indicate the rotation direction of the transport rollers 21 and 22.

  The inkjet head 30K is an inkjet head that discharges black ink. The inkjet head 30M is an inkjet head that ejects magenta ink. The inkjet head 30Y is an inkjet head that discharges yellow ink. The inkjet head 30C is an inkjet head that discharges cyan ink. Ink jet heads 30K, 30M, 30Y, and 30C are formed with a plurality of nozzles that eject the above-described color ink. In the embodiment, each surface on which the nozzles are formed by the ink jet heads 30K, 30M, 30Y, and 30C is referred to as an “ejection surface 31” (see FIG. 3). The ejection surface 31 is a generic term for each surface on which the nozzles are formed by the inkjet heads 30K, 30M, 30Y, and 30C, or the nozzle is formed by any one of the inkjet heads 30K, 30M, 30Y, and 30C. Show the surface. According to the inkjet heads 30K, 30M, 30Y, and 30C, a full-color pattern can be recorded on the recording medium 15. 1 and 2, the pattern given to the portion of the recording medium 15 illustrated on the downstream side in the transport direction from the inkjet heads 30K, 30M, 30Y, and 30C corresponds to the pattern recorded on the recording medium 15.

  The carriage 40 includes a base portion 41, a pedestal portion 44, and two connecting portions 46. The base portion 41, the pedestal portion 44, and the two connecting portions 46 are integrated. For example, the base portion 44 and the two connecting portions 46 are fixed to the base portion 41. In the carriage 40, the inkjet heads 30K, 30M, 30Y, and 30C are mounted on the base portion 41 in a state adjacent to each other in the main scanning direction. The main scanning direction coincides with the width direction of the endless belt 23 and is orthogonal to the transport direction. The order of arrangement of the inkjet heads 30K, 30M, 30Y, and 30C in the main scanning direction may be different from those in FIGS. These arrangement orders are appropriately determined in consideration of various conditions. The base portion 44 is provided with a nut 83 which will be described later. In the carriage 40, the mounting surface 45 (see FIG. 3) is above the upper surface 42 of the base portion 41 in the vertical direction. The attachment surface 45 is a surface of the pedestal portion 44 on which the nut 83 is provided. The attachment surface 45 is a horizontal plane. The two connecting portions 46 correspond to two guide rails 58 described later, and are provided at both ends of the base portion 41 on the first side and the second side in the main scanning direction.

  The support unit 50 connects the carriage 40 and the moving unit 70. The support part 50 includes a main body part 51 and a guide part 57. The main body 51 includes a wall 52, a fastening part 55, and an installation part 56. In the main body 51, the wall 52, the fastening portion 55, and the installation portion 56 are integrally formed. The wall 52 is a part of the wall-shaped main body 51 along the vertical direction. In the embodiment, the downstream surface of the wall 52 in the transport direction is referred to as “first wall surface 53”, and the upstream surface of the wall 52 in the transport direction is referred to as “second wall surface 54”. The fastening portion 55 is a portion of the main body 51 that protrudes from the first wall surface 53 to the downstream side in the transport direction at a predetermined position in the vertical direction between the upper end and the lower end of the main body 51 in the vertical direction. The main body 51 is connected to a timing belt 73 of the moving unit 70 described later at the fastening portion 55. The installation part 56 is a part of the main body 51 that is provided at the upper end in the vertical direction of the main body 51 and protrudes upstream in the transport direction. The upper surface in the vertical direction of the installation part 56 (the upper end surface of the main body part 51) includes a horizontal plane.

  The guide part 57 guides the movement of the carriage 40 in the vertical direction. That is, the guide portion 57 is a guide mechanism that guides the movement described above. The guide part 57 is provided in the main body part 51. The guide portion 57 is connected to the carriage 40 while being provided in the main body portion 51. In the ink jet recording apparatus 10, the guide portion 57 is configured to include the same two linear motion mechanisms. In the ink jet recording apparatus 10, the above-described linear motion mechanism serving as the guide portion 57 is a linear guide. In the support portion 50, the two linear motion mechanisms as the guide portion 57 are provided on the first side and the second side of the second wall surface 54 in the main scanning direction. That is, the guide rails 58 are provided in a state along the vertical direction at both ends of the second wall surface 54 on the first side and the second side in the main scanning direction. The two blocks 59 are connected to the two connecting portions 46 provided on the base portion 41 of the carriage 40. The block 59 moves on the guide rail 58 in the vertical direction while being engaged with the guide rail 58 on the first side and the second side in the main scanning direction. As the guide portion 57, a known linear guide can be adopted. Therefore, the description regarding the structure of the linear guide used as the guide part 57 is abbreviate | omitted.

  The main tank 60K stores black ink. The supply flow path 61K connects the main tank 60K and the sub tank 62K. The sub tank 62K is provided above the ink jet head 30K on the base portion 41 of the carriage 40. That is, the sub tank 62K is provided on the base portion 41 directly above the ink jet head 30K. The sub tank 62K secondarily stores the black ink supplied to the inkjet head 30K. The connection flow path 63K connects the sub tank 62K and the inkjet head 30K. By providing the sub tank 62K above (directly above) the inkjet head 30K, the channel length of the connection channel 63K can be shortened.

  The main tank 60M stores magenta ink. The supply flow path 61M connects the main tank 60M and the sub tank 62M. The sub tank 62M is provided above the ink jet head 30M on the base portion 41 of the carriage 40. That is, the sub tank 62M is provided on the base portion 41 directly above the ink jet head 30M. The sub tank 62M stores magenta ink supplied to the inkjet head 30M as a secondary storage. The connection flow path 63M connects the sub tank 62M and the inkjet head 30M. By providing the sub tank 62M above (directly above) the inkjet head 30M, the channel length of the connection channel 63M can be shortened.

  The main tank 60Y stores yellow ink. The supply flow path 61Y connects the main tank 60Y and the sub tank 62Y. The sub tank 62Y is provided above the inkjet head 30Y on the base 41 of the carriage 40. That is, the sub tank 62Y is provided on the base portion 41 directly above the ink jet head 30Y. The sub tank 62Y stores yellow ink supplied to the inkjet head 30Y as a secondary. The connection flow path 63Y connects the sub tank 62Y and the inkjet head 30Y. By providing the sub tank 62Y above (directly above) the inkjet head 30Y, the channel length of the connection channel 63Y can be shortened.

  The main tank 60C stores cyan ink. The supply flow path 61C connects the main tank 60C and the sub tank 62C. The sub tank 62C is provided above the ink jet head 30C on the base portion 41 of the carriage 40. That is, the sub tank 62C is provided on the base portion 41 directly above the inkjet head 30C. The sub tank 62C secondarily stores the cyan ink supplied to the inkjet head 30C. The connection flow path 63C connects the sub tank 62C and the inkjet head 30C. By providing the sub tank 62C above (directly above) the inkjet head 30C, the channel length of the connection channel 63C can be shortened.

  The ink of each color stored in the main tanks 60K, 60M, 60Y, and 60C flows out of the main tanks 60K, 60M, 60Y, and 60C, and the supply flow of the corresponding color in the supply flow paths 61K, 61M, 61Y, and 61C. It flows through the path and is supplied to the sub tanks 62K, 62M, 62Y, 62C. The inks of the respective colors supplied to the sub tanks 62K, 62M, 62Y, and 62C flow through the corresponding color connection channels among the connection channels 63K, 63M, 63Y, and 63C, and then enter the inkjet heads 30K, 30M, 30Y, and 30C. Supplied. 1 and 2, the supply flow paths 61K, 61M, 61Y, and 61C are illustrated in a simplified state. The supply flow paths 61K, 61M, 61Y, and 61C are provided in a state that can handle movements of a carriage 40, which will be described later, in the main scanning direction and the vertical direction.

  The moving unit 70 reciprocates the carriage 40 connected via the support unit 50 in the main scanning direction. In other words, the moving unit 70 reciprocates the carriage 40 and the support unit 50 in the main scanning direction. That is, the moving unit 70 is a drive mechanism that performs the above-described reciprocating movement. The moving unit 70 is provided on the downstream side of the support unit 50 in the transport direction. The moving unit 70 includes two pulleys 71 and 72, a timing belt 73, and a second motor 74. The pulley 71 is provided on the first side in the main scanning direction with the transport unit 20 as a reference. The pulley 72 is provided on the second side in the main scanning direction with the transport unit 20 as a reference. The pulley 72 is rotatably supported. The timing belt 73 is stretched over pulleys 71 and 72 in a state where tension is applied. The second motor 74 is connected to the pulley 71. The second motor 74 rotates the pulley 71. As the second motor 74, for example, a servo motor with an encoder is employed. 1 and 2, an arrow shown inside the pulley 71 indicates the rotation direction of the pulley 71. The carriage 40 is attached to the timing belt 73 via the support unit 50.

  The elevating unit 80 moves the carriage 40 in the vertical direction. The elevating unit 80 is provided on the support unit 50 in a state above the base unit 41 of the carriage 40. In the inkjet recording apparatus 10, the elevating unit 80 is provided in the installation unit 56 of the support unit 50. The elevating unit 80 includes an elevating shaft unit 81 and a third motor 84. The elevating unit 80 is connected to the carriage 40 in a state where the elevating shaft unit 81 is disposed between the sub tank 62M and the sub tank 62Y in the main scanning direction. The lifting shaft 81 is adjacent to the sub tank 62M on the first side in the main scanning direction, and is adjacent to the sub tank 62Y on the second side in the main scanning direction. The elevating shaft part 81 is in a state along the vertical direction. In the inkjet recording apparatus 10, the elevating shaft portion 81 is a ball screw. Therefore, the elevating shaft portion 81 includes a screw shaft 82 and a nut 83. That is, in the state in which the elevating unit 80 is provided on the support unit 50, the elevating shaft unit 81 includes the screw shaft 82 and the nut 83 between the sub tank 62M and the sub tank 62Y in the main scanning direction, and the screw shaft 82 is vertical. It is in a state along the direction. In the inkjet recording apparatus 10, as described above, the sub tank 62M is provided above the inkjet head 30M, and the sub tank 62Y is provided above the inkjet head 30Y. Therefore, the space between the sub tank 62M and the sub tank 62Y in the main scanning direction is also between the ink jet head 30M and the ink jet head 30Y in the main scanning direction.

  The nut 83 is provided on the base portion 44 of the carriage 40. The nut 83 is fixed to the mounting surface 45 (see FIG. 3) of the pedestal portion 44. Accordingly, the elevating unit 80 is connected to the carriage 40. Although not described above, the base portion 44 is formed with a first hole portion that is continuous with the screw hole of the nut 83 in a state where the nut 83 is fixed to the mounting surface 45. The first hole portion penetrates the portion of the pedestal portion 44 along the conveyance direction including the attachment surface 45 in the vertical direction. 1 to 3, the first hole is not shown. Further, a second hole 43 that is coaxial with the first hole is formed in the base 41 of the carriage 40. The second hole portion 43 penetrates the base portion 41 in the vertical direction. The first hole portion and the second hole portion 43 are through holes having a diameter larger than the outer diameter of the screw shaft 82. A screw shaft 82 is inserted into the first hole. As the carriage 40 is raised by the elevating unit 80, the screw shaft 82 that has passed through the first hole in the lower side in the vertical direction is then passed through the second hole 43 (see FIG. 2). However, the screw shaft 82 may have a size that does not pass through the second hole 43 downward in the vertical direction in the following state. The above-described state is a state in which the carriage 40 is raised to the rising end in the vertical direction by the elevating unit 80. In this case, the tip portion of the screw shaft 82 on the lower side in the vertical direction does not protrude downward in the vertical direction from the base portion 41 of the carriage 40 in the above-described state, as in the “second state” of FIG. 3. The second hole 43 may be a hole having a bottom. A known ball screw can be used for the elevating shaft portion 81. Therefore, the description regarding the structure etc. of the screw shaft 82 and the nut 83 used as the raising / lowering shaft part 81 is abbreviate | omitted.

  The third motor 84 is provided in the installation unit 56. The third motor 84 is fixed to the upper horizontal surface in the vertical direction of the installation portion 56 in a state where the rotating shaft 85 (see FIG. 3) protrudes downward in the vertical direction. The rotation shaft 85 is connected to the screw shaft 82. The third motor 84 rotates the screw shaft 82. As the third motor 84, a servo motor with an encoder is employed. 1 and 2, the arrow shown inside the third motor 84 indicates the direction of rotation of the screw shaft 82. When the screw shaft 82 is rotated in the first direction by the third motor 84, the nut 83 is moved upward in the vertical direction. The carriage 40 moves upward in the vertical direction by the same amount as the nut 83 as the nut 83 moves upward in the vertical direction. When the screw shaft 82 is rotated in the second direction by the third motor 84, the nut 83 moves downward in the vertical direction. The second direction is opposite to the first direction described above. For example, when the rotation in the first direction is a right rotation, the rotation in the second direction is a left rotation. The carriage 40 moves downward in the vertical direction by the same amount as the nut 83 as the nut 83 moves downward in the vertical direction. The movement of the carriage 40 in the vertical direction by the elevating unit 80 is guided by a guide unit 57 using two linear guides.

  When the pattern is recorded on the recording medium 15 by the ink jet recording apparatus 10, the elevating unit 80, the moving unit 70, and the conveying unit 20 operate as follows. First, in the inkjet recording apparatus 10, the gap G1 is in a state corresponding to the recording medium 15 having a predetermined thickness on which a new pattern is recorded. The gap G <b> 1 is the distance between the surface of the recording medium 15 and the ejection surface 31. The gap G1 corresponds to the difference obtained by subtracting the thickness of the recording medium 15 from the distance between the transport surface 24 and the ejection surface 31. For example, when the distance between the transport surface 24 and the ejection surface 31 is G2 and the thickness of the recording medium 15 is T1 (see “first state” in FIGS. 1 and 3), the gap G1 is “interval G2—thickness T1”. It is. When the gap between the transport surface 24 and the ejection surface 31 is G3 and the thickness of the recording medium 15 is T2 (see “second state” in FIGS. 2 and 3), the gap G1 is “interval G3—thickness T2”. . The gap G1 affects the recording quality of the pattern recorded on the recording medium 15. For example, the gap G1 is appropriately set according to the ink type. In addition, for example, the gap G1 is appropriately set according to the material and / or surface state of the recording medium 15. In the inkjet recording apparatus 10, the elevating unit 80 starts driving the third motor 84, and the carriage 40 is moved in the vertical direction. The driving of the third motor 84 is continued until the carriage 40 moves to the next position. The aforementioned position is a position in the vertical direction where the gap between the surface of the recording medium 15 and the ejection surface 31 is the gap G1.

  For example, it is assumed that a pattern is newly recorded on the recording medium 15 having the thickness T2 by the inkjet recording apparatus 10 (see “first state” in FIGS. 1 and 3) corresponding to the recording medium 15 having the thickness T1. In the inkjet recording apparatus 10, the elevating unit 80 starts driving the third motor 84, and the carriage 40 is moved upward in the vertical direction. The driving of the third motor 84 is continued until the carriage 40 moves to a vertical position where the gap between the surface of the recording medium 15 having the thickness T2 and the ejection surface 31 becomes the gap G1 (see “No. 1” in FIGS. 2 and 3). See "Two States"). It is assumed that a pattern is newly recorded on the recording medium 15 having the thickness T1 by the inkjet recording apparatus 10 (see “second state” in FIGS. 2 and 3) in a state corresponding to the recording medium 15 having the thickness T2. In the inkjet recording apparatus 10, the elevating unit 80 starts driving the third motor 84, and the carriage 40 is moved downward in the vertical direction. The driving of the third motor 84 is continued until the carriage 40 moves to a vertical position where the gap between the surface of the recording medium 15 having the thickness T1 and the ejection surface 31 becomes the gap G1 (see “No. 1” in FIGS. 1 and 3). One state ”).

  Thereafter, the inkjet recording apparatus 10 starts pattern recording. In this case, in the moving unit 70, the second motor 74 coupled to the pulley 71 reciprocates in the clockwise and counterclockwise directions. As the second motor 74 rotates, the pulley 71 rotates back and forth on both the left and right sides. When the pulley 71 rotates counterclockwise as the second motor 74 rotates in a predetermined direction, the timing belt 73 also rotates counterclockwise. The pulley 72 rotates following the timing belt 73 that rotates counterclockwise. Accordingly, the carriage 40 moves from the second side in the main scanning direction to the first side. When the carriage 40 reaches the first moving end in the main scanning direction, the rotation direction of the second motor 74 is reversed, and the pulley 71 rotates to the right. When the pulley 71 rotates to the right, the timing belt 73 also rotates to the right. The pulley 72 rotates following the timing belt 73 that rotates clockwise. Accordingly, the carriage 40 moves from the first side in the main scanning direction to the second side. When the carriage 40 reaches the moving end on the second side in the main scanning direction, the rotation direction of the second motor 74 is reversed again, and the pulley 71 rotates left again.

  The transport unit 20 transports the recording medium 15 in the transport direction in response to the reciprocation of the carriage 40 in the main scanning direction. That is, the conveyance of the recording medium 15 by the conveyance unit 20 is intermittently performed according to the reciprocation of the carriage 40 in the main scanning direction. The ink of each color is ejected toward the recording medium 15 from each nozzle formed on the inkjet heads 30K, 30M, 30Y, and 30C at a predetermined timing when the carriage 40 is moved in the main scanning direction. Each color ink ejected from each nozzle of the inkjet heads 30K, 30M, 30Y, and 30C lands on the surface of the recording medium 15. A pattern is recorded on the recording medium 15 by the landed ink of each color. The moving unit 70 operates until the pattern recording is completed. Therefore, the reciprocating movement of the carriage 40 in the main scanning direction is repeated until the pattern printing is completed. The conveyance unit 20 stops at a predetermined timing after the pattern recording is completed. As the transport unit 20 stops, transport of the recording medium 15 in the transport direction also ends.

<Effect of embodiment>
According to the embodiment, the following effects can be obtained.

  (1) In the inkjet recording apparatus 10, the inkjet heads 30K, 30M, 30Y, and 30C are mounted on the base portion 41 of the carriage 40 (see FIGS. 1 and 2). The sub tanks 62K, 62M, 62Y, and 62C are provided on the base portion 41 of the carriage 40 above the ink jet heads of the corresponding colors among the ink jet heads 30K, 30M, 30Y, and 30C. The carriage 40 is connected to the moving unit 70 via the support unit 50. The support unit 50 is provided with an elevating unit 80. The elevating part 80 is provided above the base part 41 of the carriage 40. The elevating unit 80 moves the carriage 40 in the vertical direction. The elevating part 80 includes an elevating shaft part 81. The elevating shaft part 81 is provided in a state along the vertical direction. The elevating unit 80 is connected to the carriage 40 in a state where the elevating shaft unit 81 is disposed between the sub tank 62M and the sub tank 62Y in the main scanning direction. Therefore, the sub tanks 62K, 62M, 62Y, 62C and the elevating unit 80 can be compactly arranged in the direction along the transport direction. The carriage 40 can be downsized in the direction along the conveyance direction. The direction along the transport direction is a direction orthogonal to the main scanning direction, and is also referred to as “sub-scanning direction”.

  (2) The support portion 50 is provided with a guide portion 57 (see FIGS. 1 and 2). The guide part 57 is configured to include two linear motion mechanisms. The aforementioned linear motion mechanism is a linear guide. In the support portion 50, guide rails 58 are provided in a state along the vertical direction at both ends of the second wall surface 54 on the first side and the second side in the main scanning direction. The two blocks 59 correspond to the first and second guide rails 58 in the main scanning direction, and are provided at both ends of the base portion 41 of the carriage 40 on the first and second sides in the main scanning direction. . The block 59 moves on the guide rail 58 in the vertical direction while being engaged with the guide rail 58 on the first side and the second side in the main scanning direction. Therefore, the movement of the carriage 40 in the vertical direction by the elevating unit 80 can be performed smoothly.

<Modification>
The embodiment can also be performed as follows. Some configurations of the modifications shown below can be appropriately combined and employed. Hereinafter, points different from the above will be described, and description of similar points will be omitted as appropriate.

  (1) In the inkjet recording apparatus 10, the sub tanks 62K, 62M, 62Y, and 62C are disposed above (directly above) the inkjet head of the corresponding color among the inkjet heads 30K, 30M, 30Y, and 30C on the base portion 41 of the carriage 40. (See FIGS. 1 and 2). The sub tanks 62K, 62M, 62Y, and 62C may be provided above the ink jet heads of the corresponding colors among the ink jet heads 30K, 30M, 30Y, and 30C on the base portion 41 of the carriage 40. The arrangement of the sub tanks 62K, 62M, 62Y, and 62C with respect to the inkjet heads 30K, 30M, 30Y, and 30C is appropriately determined in consideration of various conditions.

  (2) In the inkjet recording apparatus 10, the elevating unit 80 includes an elevating shaft unit 81 and a third motor 84 (see FIGS. 1 to 3). The elevating shaft portion 81 is a ball screw including a screw shaft 82 and a nut 83. The raising / lowering part should just be the structure which can move a carriage to a perpendicular direction. For example, the elevating unit may be an actuator such as a hydraulic cylinder or an air cylinder. In this case, the rod of the hydraulic cylinder or air cylinder becomes the lifting shaft. The hydraulic cylinder or the air cylinder as the elevating part is provided on the support part 50 in a state where the protruding direction of the rod is on the lower side in the vertical direction. That is, the hydraulic cylinder or the air cylinder is fixed to the upper horizontal surface in the vertical direction of the installation portion 56 in the state described above. The hydraulic cylinder or the air cylinder is connected to the carriage in a state where the rod is disposed between the sub tank 62M and the sub tank 62Y in the main scanning direction. The rod is in a state along the vertical direction, and is adjacent to the sub tank 62M on the first side in the main scanning direction and adjacent to the sub tank 62Y on the second side in the main scanning direction. The rod is connected to the carriage pedestal at the tip. In the pedestal portion, the first hole portion may be omitted. When the elevating part is a hydraulic cylinder or an air cylinder, the carriage includes a base part and two connecting parts 46, and the configuration corresponding to the base part 44 may be omitted. In the base portion, the second hole portion 43 may be omitted. The tip of the rod is directly connected to the base. The guide part of the support part may also be configured to guide the movement of the carriage 40 in the vertical direction, and may be configured differently from the linear guide of the guide part 57. For example, the guide portion may be configured by a shaft and a linear bush. The shaft corresponds to the guide rail 58, and the linear bush corresponds to the block 59.

  (3) In the inkjet recording apparatus 10, the elevating unit 80 is connected to the carriage 40 in a state where the elevating shaft unit 81 is disposed between the sub tank 62M and the sub tank 62Y in the main scanning direction (see FIGS. 1 and 2). . The elevating unit 80 may be connected to the carriage in a state in which the elevating shaft unit 81 is disposed between the sub tank 62K and the sub tank 62M or between the sub tank 62Y and the sub tank 62C in the main scanning direction. In this case, in the carriage, the pedestal portion 44 is provided corresponding to the position of the elevating shaft portion 81 in the main scanning direction with respect to the base portion. In the base portion, the second hole portion 43 is formed corresponding to the position of the elevating shaft portion 81 in the main scanning direction. However, when the elevating shaft portion 81 is disposed between the sub tank 62M and the sub tank 62Y in the main scanning direction, the moving body that is reciprocated in the main scanning direction by the moving unit 70 is moved toward the first side and the second side in the main scanning direction. The structure can be symmetrical on the side, and the weight can be evenly balanced on the first side and the second side in the main scanning direction. The moving body can be smoothly reciprocated in the main scanning direction. The moving body includes the inkjet heads 30K, 30M, 30Y, and 30C, the carriage 40, the support portion 50, the sub tanks 62K, 62M, 62Y, and 62C, the connection flow paths 63K, 63M, 63Y, and 63C, and the elevating portion 80.

  (4) The inkjet recording apparatus 10 is provided with a transport unit 20, and the recording medium 15 is transported in the transport direction by the transport unit 20 (see FIGS. 1 and 2). The transport direction is a direction along a direction orthogonal to the main scanning direction. The recording medium may be moved relative to the inkjet heads 30K, 30M, 30Y, and 30C in the direction orthogonal to the main scanning direction. That is, in the ink jet recording apparatus, the carriage 40 may be moved in a direction orthogonal to the main scanning direction. In this case, the ink jet recording apparatus includes a table-like placement unit, and the recording medium is placed on the upper surface of the table-like placement unit. The conveyance unit 20 is omitted. When the carriage 40 is moved in a direction orthogonal to the main scanning direction, the ink jet recording apparatus includes a first moving unit and a second moving unit. The first moving unit is a moving unit corresponding to the moving unit 70 described above. The second moving unit is a moving unit that moves the carriage 40 in a direction orthogonal to the main scanning direction. The second moving unit intermittently moves the carriage 40 from one side in the direction orthogonal to the main scanning direction to the other side in accordance with the reciprocating movement of the carriage 40 by the first moving unit. The second moving unit moves the support unit 50 and the first moving unit in the same direction together with the carriage 40. Such a configuration can be employed, for example, when the recording medium is short.

  (5) In the ink jet recording apparatus 10, the elevating unit 80 includes one elevating shaft unit 81 (see FIGS. 1 and 2). The elevating unit may include a plurality of elevating shaft units. An elevating part provided with a plurality of elevating shaft parts is employed in the following cases. As the above-described case, a case where the carriage 40 is wide in the main scanning direction is exemplified. When the number of inkjet heads mounted on the carriage 40 increases or the inkjet heads of the respective colors increase in size, the carriage 40 becomes wider in the main scanning direction. An ink jet recording apparatus 10 provided with a lifting unit including a plurality of lifting shafts will be described with reference to FIGS. 4 and 5. However, in FIG.4 and FIG.5, illustration of the conveyance part 20 and the moving part 70 is abbreviate | omitted. In the description based on FIG. 4 and FIG. 5, in order to clarify the correspondence with the ink jet recording apparatus 10 shown in FIG. 1 and FIG. In the description based on FIG. 5, in order to clarify the correspondence with the description based on FIG. 4, the reference numerals for the common or corresponding parts are the same as those used in FIG. 4.

  In the inkjet recording apparatus 10 shown in FIGS. 4 and 5, the number of inkjet heads is six. The ink jet heads provided in the ink jet recording apparatus 10 shown in FIGS. 4 and 5 are the same ink jet heads 30K, 30M, 30Y, and 30C as those described above, and the ink jet heads 30LM and 30LC. Accordingly, the ink jet recording apparatus 10 shown in FIGS. 4 and 5 further includes main tanks 60LM and 60LC, supply flow paths 61LM and 61LC, sub tanks 62LM and 62LC, and connection flow paths 63LM and 63LC.

  The inkjet head 30LM is an inkjet head that ejects light magenta ink. The inkjet head 30LC is an inkjet head that discharges light cyan ink. In the inkjet recording apparatus 10 shown in FIGS. 4 and 5, the arrangement order of the inkjet heads 30K, 30M, 30Y, 30C, 30LM, and 30LC in the main scanning direction is from the first side to the second side in the main scanning direction. The order of the inkjet heads 30K, 30M, 30Y, 30C, 30LM, and 30LC is set. The arrangement order of the inkjet heads 30K, 30M, 30Y, 30C, 30LM, and 30LC may be different from that shown in FIGS. The inkjet heads 30LM and 30LC have the same configuration as the inkjet heads 30K, 30M, 30Y and 30C.

  The main tank 60LM stores light magenta ink. The supply flow path 61LM connects the main tank 60LM and the sub tank 62LM. The sub tank 62LM is provided above the inkjet head 30LM on the base portion 41 of the carriage 40. That is, the sub tank 62LM is provided on the base portion 41 directly above the ink jet head 30LM. The sub tank 62LM stores the light magenta ink supplied to the inkjet head 30LM as a secondary storage. The connection flow path 63LM connects the sub tank 62LM and the inkjet head 30LM. By providing the sub tank 62LM above (directly above) the inkjet head 30LM, the flow path length of the connection flow path 63LM can be shortened.

  The main tank 60LC stores light cyan ink. The supply flow path 61LC connects the main tank 60LC and the sub tank 62LC. The sub tank 62LC is provided above the inkjet head 30LC on the base 41 of the carriage 40. That is, the sub tank 62LC is provided on the base portion 41 directly above the ink jet head 30LC. The sub tank 62LC stores the light cyan ink supplied to the inkjet head 30LC as a secondary storage. The connection flow path 63LC connects the sub tank 62LC and the inkjet head 30LC. By providing the sub tank 62LC above (directly above) the inkjet head 30LC, the channel length of the connection channel 63LC can be shortened.

  The inks of the respective colors stored in the main tanks 60LM and 60LC flow out of the main tanks 60LM and 60LC, flow through the corresponding color supply passages of the supply passages 61LM and 61LC, and are supplied to the sub tanks 62LM and 62LC. . The inks of the respective colors supplied to the sub tanks 62LM and 62LC flow through the corresponding color connection channels among the connection channels 63LM and 63LC, and are supplied to the inkjet heads 30LM and 30LC. In the inkjet recording apparatus 10 shown in FIGS. 4 and 5 as well, the supply flow paths 61K, 61M, 61Y, 61C, 61LM, and 61LC are in a state that can handle each movement of the carriage 40 in the main scanning direction and the vertical direction, as described above. Provided.

  When six ink colors are used, the combination of ink colors may be different from black, magenta, yellow, cyan, light magenta, and light cyan. For example, the ink color employed in addition to black, magenta, yellow, and cyan may be different from light magenta and light cyan. Clear ink may be used for pattern recording. When ink of a color other than the aforementioned six colors or clear ink is employed, the ink jet recording apparatus includes an ink jet head, a main tank, a supply channel, a sub tank, and a connection channel corresponding to the employed color.

  In the inkjet recording apparatus 10 illustrated in FIG. 4, the elevating unit 90 includes two elevating shaft units 92 and 93, a fourth motor 94, and a fifth motor 95. The elevating shaft portions 92 and 93 have the same configuration as the elevating shaft portion 81. That is, the elevating shaft portions 92 and 93 are ball screws and include a screw shaft 82 and a nut 83. The fourth motor 94 and the fifth motor 95 are motors corresponding to the third motor 84. In the ink jet recording apparatus 10 shown in FIG. 4, the carriage 40 is provided with two pedestals 47 and 48. The pedestal portions 47 and 48 correspond to the pedestal portion 44 and have the same configuration as the pedestal portion 44. Of the two pedestal portions 47, 48, the pedestal portion 47 is provided at a position corresponding to the lifting shaft portion 92, and the pedestal portion 48 is provided at a position corresponding to the lifting shaft portion 93. The nut 83 of the elevating shaft portion 92 is provided on the pedestal portion 47, and the nut 83 of the elevating shaft portion 93 is provided on the pedestal portion 48.

  The lifting shaft 92 is adjacent to the sub tank 62K on the first side in the main scanning direction, and is adjacent to the sub tank 62M on the second side in the main scanning direction. The elevating shaft portion 92 is in a state along the vertical direction. That is, in the state in which the elevating unit 90 is provided on the support unit 50, the elevating shaft unit 92 includes the screw shaft 82 and the nut 83 between the sub tank 62K and the sub tank 62M in the main scanning direction, and the screw shaft 82 is vertical. It is in a state along the direction. The lifting shaft 93 is adjacent to the sub tank 62LM on the first side in the main scanning direction, and is adjacent to the sub tank 62LC on the second side in the main scanning direction. The elevating shaft portion 93 is in a state along the vertical direction. That is, in the state in which the elevating unit 90 is provided on the support unit 50, the elevating shaft unit 93 includes the screw shaft 82 and the nut 83 between the sub tank 62LM and the sub tank 62LC in the main scanning direction, and the screw shaft 82 is vertical. It is in a state along the direction. The elevating shaft portions 92 and 93 are provided in a state where the positions in the transport direction coincide with each other. That is, the elevating shaft portions 92 and 93 are provided adjacent to each other in the main scanning direction across the sub tanks 62M, 62Y, 62C, and 62LM.

  In the elevating part 90, the fourth motor 94 is provided for the elevating shaft part 92, and the fifth motor 95 is provided for the elevating shaft part 93. The fourth motor 94 rotates the screw shaft 82 in a state where the rotary shaft 85 is connected to the screw shaft 82 of the elevating shaft portion 92. The fifth motor 95 rotates the screw shaft 82 in a state where the rotary shaft 85 is connected to the screw shaft 82 of the elevating shaft portion 93. The fourth motor 94 and the fifth motor 95 are driven in a synchronized state. Accordingly, the screw shafts 82 of the elevating shaft portions 92 and 93 rotate by the same amount in the same direction and at the same speed at the same timing. In FIG. 4, the arrows shown inside the fourth motor 94 and the fifth motor 95 indicate the rotation direction of the screw shaft 82. In FIG. 4, the rotation shafts 85 of the fourth motor 94 and the fifth motor 95 are not shown.

  In the ink jet recording apparatus 10 shown in FIG. 4, as in the ink jet recording apparatus 10 shown in FIG. 1 and FIG. 2, the moving body reciprocated in the main scanning direction by the moving unit 70 (not shown) And a symmetric structure on the second side, and an equal weight balance can be achieved on the first side and the second side in the main scanning direction. The moving bodies described above include the inkjet heads 30K, 30M, 30Y, 30C, 30LM, and 30LC, the carriage 40, the support unit 50, the sub tanks 62K, 62M, 62Y, 62C, 62LM, and 62LC, and the connection flow paths 63K, 63M, 63Y, and 63C. , 63LM, 63LC and a lifting / lowering unit 90.

  When the elevating part includes a plurality of elevating shaft parts, the rotation of one screw shaft 82 may be transmitted to another screw shaft 82 by a predetermined transmission mechanism. For example, when the lifting / lowering portion 91 includes two lifting / lowering shaft portions 92 and 93 as in the inkjet recording apparatus 10 illustrated in FIG. 5, the lifting / lowering portion 91 is provided with two pulleys 96 and 97 and a timing belt 98. It is done. In the ink jet recording apparatus 10 shown in FIG. 5, the screw shafts 82 of the elevating shaft portions 92 and 93 are in a state in which the end portion on the upper side in the vertical direction protrudes upward in the vertical direction of the installation portion 56. The screw shafts 82 of the elevating shaft portions 92 and 93 are rotatably supported through a bearing 99, for example. The bearing 99 is provided in the installation portion 56.

  The pulleys 96 and 97 are respectively attached to the end portions of the screw shaft 82 projecting upward from the installation portion 56 in the vertical direction. The timing belt 98 is stretched over pulleys 96 and 97 in a state where tension is applied. The third motor 84 is provided for the lifting shaft 92. The third motor 84 rotates the screw shaft 82 in a state where the rotary shaft 85 is connected to the screw shaft 82 of the elevating shaft portion 92. In FIG. 5, the arrow shown inside the third motor 84 indicates the rotation direction of the screw shaft 82.

  When the screw shaft 82 of the elevating shaft 92 is rotated in the first direction by the third motor 84, the pulley 96 is rotated in the first direction, and the timing belt 98 is also rotated in the first direction. The pulley 97 rotates following the timing belt 98 that rotates in the first direction. Accordingly, the screw shaft 82 of the elevating shaft portion 93 rotates by the same amount at the same speed in the first direction at the same timing as the screw shaft 82 of the elevating shaft portion 92. When the screw shaft 82 of the elevating shaft 92 is rotated in the second direction by the third motor 84, the pulley 96 is rotated in the second direction, and the timing belt 98 is also rotated in the second direction. The pulley 97 rotates following the timing belt 98 that rotates in the second direction. Accordingly, the screw shaft 82 of the lifting shaft portion 93 rotates by the same amount at the same speed in the second direction at the same timing as the screw shaft 82 of the lifting shaft portion 92.

  As described above, in the inkjet recording apparatus 10 shown in FIG. 4, the screw shaft 82 of the elevating shaft portion 93 is rotated by the fifth motor 95. On the other hand, in the ink jet recording apparatus 10 shown in FIG. 5, the screw shaft 82 of the elevating shaft portion 93 is rotated via a transmission mechanism including pulleys 96 and 97 and a timing belt 98. The inkjet recording apparatus 10 shown in FIGS. 4 and 5 is different in this respect, but the other configurations are the same. Therefore, the other description regarding the inkjet recording device 10 shown in FIG. 5 is abbreviate | omitted.

  Three or more lifting shafts may be provided in the lifting unit. For example, as in the case of the ink jet recording apparatus 10 shown in FIGS. 4 and 5, when the number of ink jet heads mounted on the carriage is six, the third elevating shaft portion is disposed at the center in the main scanning direction, for example. Provided between two sub tanks. The carriage is provided with a pedestal corresponding to the third elevating shaft, and the nut of the elevating shaft is provided on the pedestal as described above. The above-mentioned two sub tanks are sub tanks 62Y and 62C based on FIGS. In the elevating unit including the third elevating shaft unit, a motor is provided for each elevating shaft unit, as in the ink jet recording apparatus 10 shown in FIG. On the other hand, a lifting mechanism including a third lifting shaft may be provided with a transmission mechanism using a pulley and a timing belt, as in the ink jet recording apparatus 10 shown in FIG. In this case, the rotation of one screw shaft accompanying the drive of the motor may be transmitted to the other two screw shafts. However, the rotation of one screw shaft may be transmitted to another screw shaft, and the rotation of the other screw shaft may be transmitted to the remaining screw shafts.

  In the ink jet recording apparatus 10 shown in FIGS. 4 and 5, the sub tank 62K is a sub tank provided on the first side in the main scanning direction most of the sub tanks 62K, 62M, 62Y, 62C, 62LM, and 62LC. The sub tank is adjacent to the sub tank 62K in the main scanning direction. In the ink jet recording apparatus 10 shown in FIGS. 4 and 5, the sub tank 62LC is a sub tank provided on the second side in the most main scanning direction among the sub tanks 62K, 62M, 62Y, 62C, 62LM, and 62LC. The sub tank 62LC is adjacent to the sub tank 62LC in the main scanning direction.

DESCRIPTION OF SYMBOLS 10 inkjet recording device, 15 recording medium, 20 conveyance part 21,22 conveyance roller, 23 endless belt, 24 conveyance surface, 25 1st motor 30K, 30M, 30Y, 30C, 30LM, 30LC inkjet head 31 discharge surface, 40 carriage, 41 base part, 42 upper surface 43 second hole part, 44 pedestal part, 45 mounting surface, 46 connecting part 47, 48 pedestal part, 50 support part, 51 main body part, 52 wall part 53 first wall surface, 54 second wall surface, 55 Fastening part, 56 Installation part 57 Guide part, 58 Guide rail, 59 Block 60K, 60M, 60Y, 60C, 60LM, 60LC Main tank 61K, 61M, 61Y, 61C, 61LM, 61LC Supply flow path 62K, 62M, 62Y, 62C, 62LM, 62LC Sub tank 63K, 63M, 6 Y, 63C, 63LM, 63LC Connection flow path, 70 Moving part 71, 72 Pulley, 73 Timing belt, 74 Second motor 80 Lifting part, 81 Lifting shaft part, 82 Screw shaft, 83 Nut 84 Third motor, 85 Rotating shaft 90, 91 Lifting part, 92, 93 Lifting shaft part 94 Fourth motor, 95 Fifth motor, 96, 97 Pulley 98 Timing belt, 99 Bearing, G1 gap, G2, G3 spacing T1, T2 Thickness

Claims (4)

A first inkjet head for discharging the first ink to a recording medium;
A second inkjet head for discharging the second ink to the recording medium;
A carriage including a base portion on which the first inkjet head and the second inkjet head are mounted;
A first sub tank provided above the first inkjet head on the base and supplied from a first main tank for storing the first ink and storing the first ink supplied to the first inkjet head When,
A second sub tank provided above the second inkjet head on the base and supplied from a second main tank for storing the second ink and storing the second ink supplied to the second inkjet head When,
A moving part for reciprocating the carriage;
A support unit that connects the carriage and the moving unit and reciprocates together with the carriage in a main scanning direction in which the carriage is reciprocated by the moving unit;
An elevating unit provided on the support unit in a state of being above the base unit and moving the carriage in a vertical direction,
The elevating part is
Elevating shaft provided in a state along the vertical direction,
An ink jet recording apparatus, wherein the elevating shaft is connected to the carriage in a state of being disposed between the first sub tank and the second sub tank in the main scanning direction. The first sub tank is provided above the first inkjet head on the base portion,
The inkjet recording apparatus according to claim 1, wherein the second sub tank is provided above the second inkjet head on the base portion. The support part is
A main body connected to the moving unit;
The inkjet recording apparatus according to claim 1, further comprising: a guide unit that is connected to the carriage in a state of being provided in the main body unit and guides the movement of the carriage in the vertical direction by the elevating unit. . The guide portion is
A guide rail provided in the main body in a state along the vertical direction;
The inkjet recording apparatus according to claim 3, further comprising: a block that is connected to the carriage and moves along the guide rail while being engaged with the guide rail.

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