JP7006374B2 - Liquid discharge device - Google Patents

Description

The present invention relates to a liquid discharge device.

A liquid ejection recording type image forming apparatus (inkprint) that uses, for example, a liquid ejection head (droplet ejection head) for ejecting droplets as an image forming apparatus such as a printer, a facsimile, a copying apparatus, a plotter, or a multifunction device thereof. Recording devices, etc.) are known.

When forming an image in a liquid ejection recording type image forming apparatus, the impact accuracy of the droplets ejected from the nozzle greatly affects the image quality. If the landing accuracy of the droplet is poor, the image quality deteriorates, so it is necessary to position the recording head position with high accuracy (see, for example, Patent Document 1).

An object of the present invention is to provide a liquid discharge device capable of easily and highly accurately adjusting the inclination of a head holder on an actual machine.

The subject is to hold a liquid discharge head having a plurality of nozzles for discharging droplets, a head holder for holding one or more of the liquid discharge heads, a subcarriage for holding the headholder, and the subcarriage. The carriage is provided with a carriage that is movable in the main scanning direction, the carriage is provided with a reference member extending along the main scanning direction, and the subcarriage is supported by the reference member and positioned on the carriage. A rotation reference member provided on either one of the head holder and the sub-carriage for rotating the head holder in the main scanning direction with respect to the sub-carriage, and the head holder and the sub-carriage. A liquid provided on the other side of the liquid, which is provided with a shaft hole for rotatably supporting the rotation reference member and an angle adjusting portion for restricting the rotation of the head holder with respect to the subcarriage and adjusting the rotation angle. In the discharge device , the angle adjusting portion is an adjusting screw, the thread portion of the adjusting screw is rotatably supported by the head holder, and the screw tip is rotatably supported by the holding portion of the subcarriage. It is solved by a liquid discharge device characterized in that.

In the liquid discharge device of the present invention, the rotation of the head holder with respect to the sub-carriage is regulated by the angle adjusting unit, and the rotation angle can be adjusted, so that the inclination of the head holder can be easily and highly accurately adjusted on the actual machine.

It is a schematic perspective view which shows an example of the carriage of a liquid discharge device. It is a schematic side view which shows an example of the carriage of a liquid discharge device. It is a perspective view which shows the whole structure of the liquid discharge apparatus which concerns on one Embodiment of this invention. It is a perspective view which shows the carriage scanning mechanism part which concerns on one Embodiment of this invention. It is a schematic perspective view which shows the carriage which concerns on one Embodiment of this invention. It is a schematic front view which shows the carriage which concerns on one Embodiment of this invention. It is a schematic side view which shows the carriage which concerns on one Embodiment of this invention. It is an enlarged side view of the adjustment screw part. It is a schematic side view which shows the operation of the carriage which concerns on one Embodiment of this invention, (a) shows before adjustment, (b) shows at the time of adjustment. It is a schematic side view (modification example) which shows the carriage which concerns on one Embodiment of this invention. It is a schematic perspective view which shows the carriage which concerns on another embodiment of this invention. It is a schematic front view which shows the carriage which concerns on another embodiment of this invention. It is a perspective view which shows an example of an adjustment cam. It is a schematic diagram which shows the application example of the adjustment cam. It is a perspective view which shows an example of the adjustment wedge member. It is a schematic diagram which shows the application example of the adjustment wedge member. It is a schematic side view which shows the carriage which concerns on another embodiment of this invention.

Hereinafter, before explaining the embodiment, preliminary matters for facilitating the understanding of the embodiment will be described.

The present inventors are studying a liquid discharge device capable of adjusting the inclination (parallelism between the head holder and the platen) of the head holder holding the liquid discharge head (recording head) on an actual machine. As shown in FIG. 1, the liquid ejection device includes a recording head 50 having a plurality of nozzles for ejecting droplets, a head holder 52 for holding the recording head 50, and a subcarriage 54 for holding the head holder 52. It holds a subcarriage 54 and includes a carriage 56 that can move in the main scanning direction.

The carriage 56 is provided with a reference shaft 58 extending along the main scanning direction, and the subcarriage 54 is supported by the reference shaft 58 and positioned on the carriage 56. Further, as shown in FIG. 2, the head holder 52 and the sub-carriage 54 have a rotation shaft 60 of the head holder 52, an elongated hole 62 for supporting the rotation shaft 60 so as to be rotatable and vertically movable, and a head holder. A fastening portion 64 for fixing the 52 to the sub-carriage 54 is provided.

Since it is configured in this way, the head holder 52 can be rotated around the rotation shaft 60, and the inclination of the head holder 52 can be adjusted on the actual machine. Further, the vertical position of the liquid discharge surface of the recording head 50 can be adjusted by the shape of the elongated hole 62.

However, in this liquid discharge device, it is necessary to fix the head holder 52 to the sub-carriage 54 by the fastening portion 64 while holding the head holder 52 at a target inclination (parallelism). This requires, for example, a device for holding the posture of the head holder 52 by using a jig, and there is a problem that the work is not easy.

In the following embodiment, a liquid discharge device capable of adjusting the tilt of the head holder easily and with high accuracy on an actual machine will be described.

(Embodiment)
FIG. 3 is a perspective view showing the overall configuration of the liquid discharge device according to the embodiment of the present invention, and FIG. 4 is a perspective view showing the carriage scanning mechanism unit according to the embodiment of the present invention.

As shown in FIG. 3, this liquid ejection device is a serial type inkjet recording device, and includes a device main body 1 and a support base 2 for supporting the device main body 1. Inside the apparatus main body 1, guide rods 3 and guide stays 4, which are guide members, are hung on both side plates, and the carriage 5 moves in the arrow A direction (main scanning direction) to these guide rods 3 and guide stays 4. It is supported as much as possible.

The carriage 5 is equipped with a recording head 6 including a liquid ejection head that ejects ink droplets of each color of black (K), yellow (Y), magenta (M), and cyan (C). Each recording head 6 includes a plurality of nozzles for ejecting droplets. Further, each recording head 6 integrally includes a head tank that supplies ink to each recording head 6.

The main scanning mechanism unit 10 that moves and scans the carriage 5 is arranged on one side of the main scanning direction, a drive motor 11 that is rotationally driven by the drive motor 11, and the other side of the main scanning direction. The driven pulley 13 is provided with a timing belt 14 which is a traction member hung between the driven pulley 12 and the driven pulley 13. The driven pulley 13 is tensioned outward (in a direction away from the drive pulley 12) by a tension spring.

In the recording area of the main scanning area of the carriage 5, the paper 20 is intermittently conveyed by the suction transport unit in the arrow B direction (sub-scanning direction, paper transport direction) orthogonal to the main scanning direction of the carriage 5.

Further, a maintenance / recovery device 8 for maintaining / recovering the recording head 6 is arranged in one end side region of the main scanning region. Further, outside the carriage moving region in the main scanning direction, or in the other end side region of the main scanning region, a main cartridge 9 containing inks of each color supplied to the sub tank of the recording head 6 is attached to the apparatus main body 1. It can be attached and detached freely. Further, although roll paper (hereinafter referred to as “paper 20”) is set in the paper feed means 21, roll paper having different sizes in the width direction can also be set.

In the liquid discharge device configured as described above, image formation is performed as follows. First, the paper 20 conveyed from the paper feeding means 21 is conveyed to the recording area by the conveying means from the rear to the front of the apparatus main body 1. Next, the carriage 5 is moved in the main scanning direction, and the recording head 6 is driven according to the image information to eject the droplets while intermittently feeding the paper 20 to the platen 7 at the suction transfer unit. The required image is formed on the paper 20. Then, the paper 20 after image formation is cut to a predetermined length and discharged to a paper ejection tray arranged on the front side of the apparatus main body 1.

Here, the configuration in which the paper 20 is cut and discharged is described, but it is also possible to wind the paper after image formation at the paper ejection portion without cutting.

Next, the configuration of the carriage 5 of the liquid discharge device, which is a feature of the present invention, will be described in detail.

FIG. 5 is a schematic perspective view showing a carriage according to an embodiment of the present invention. As shown in FIG. 5, the carriage 5 holds the head holder 25 via the sub-carriage 18. Here, in order to make the direction easy to understand, the XYZ Cartesian coordinate system is used below. In FIG. 5, the X direction indicates the sub-scanning direction, and the Y direction indicates the main scanning direction.

The head holder 25 is equipped with recording heads 6a, 6b, 6c arranged in a staggered manner in the X direction (sub-scanning direction). When the recording heads are not individually distinguished, they are referred to as "recording head 6". Further, the number of recording heads 6 mounted on the head holder 25 may be one, two, or more than three.

The carriage 5 is provided with a reference shaft 15 as a reference member extending in the same direction as the guide rod 3 (Y direction: main scanning direction). A sub-carriage 18 is detachably and rotatably hung on the reference shaft 15 via an adjusting member 35. Further, the sub-carriage 18 abuts on the carriage 5 in the rotation direction and is held (positioned).

FIG. 6 is a schematic front view showing a carriage according to an embodiment of the present invention. As shown in FIG. 6, the adjusting member 35 is rotatably supported on the sub-carriage 18 around the sub-carriage rotation reference 37. That is, the adjusting member 35 is rotatable around the X direction (sub-scanning direction). The sub-carriage rotation reference 37 has a pin shape, and is configured to fix the adjusting member 35 by inserting it into the sub-carriage 18. Alternatively, it may be configured to be tightened to the sub-carriage 18 as a step screw.

The sub-carriage 18 holds the head holder 25 by holding portions 18a and 18b along both ends of the head holder 25. Therefore, the sub-carriage 18 is detachably and rotatably hung on the reference shaft 15 via the adjusting member 35, and the sub-carriage 18 holds the head holder 25, so that the head holder 25 is also in the axial direction of the reference shaft 15. It is held rotatably.

In this way, by providing the reference axis 15 in the same direction (parallel) as the guide rod 3 of the carriage 5, the position accuracy of the inclination of the recording head 6 in the sub-scanning direction, the height direction, the tilting direction, and the main scanning direction can be improved. Can be improved.

Further, by rotating the adjusting member 35 around the sub-carriage rotation reference 37, the sub-carriage 18 is tilted and supported with respect to the reference shaft 15. Therefore, the parallelism of the recording head 6 and the platen 7 in the X direction (secondary scanning direction) can be adjusted.

FIG. 7 is a schematic side view showing a carriage according to an embodiment of the present invention. As shown in FIGS. 5 to 7, the head holder 25 is provided with rotation reference members 31a and 31b at both ends in the Y direction (main scanning direction). Further, the holding portions 18a and 18b along both ends of the head holder 25 are provided with shaft holes 32a and 32b that rotatably support the rotation reference members 31a and 31b. Further, adjusting screws 33a and 33b, which are angle adjusting portions for restricting the rotation of the head holder 25 with respect to the subcarriage 18 and adjusting the rotation angle, are provided at both ends of the head holder 25 in the Y direction (main scanning direction). ing. The sub-carriage 18 may be provided with rotation reference members 31a and 31b, and the head holder 25 may be provided with shaft holes 32a and 32b.

As shown enlarged in FIG. 8, for example, the thread portion of the adjusting screw 33a and 33b is rotatably supported by the head holder 25, and the screw tip is rotatably supported by the holding portion 18a and 18b of the subcarriage 18. ing. Therefore, the adjusting screws 33a and 33b regulate the rotation (around the main scanning direction) of the head holder 25 with respect to the subcarriage 18. Further, the distance between the sub-carriage 18 and the head holder 25 can be changed by screwing the adjusting screws 33a and 33b.

9A and 9B are schematic side views showing the operation of the carriage according to the embodiment of the present invention, in which FIG. 9A shows before adjustment and FIG. 9B shows during adjustment. For the sake of clarity, some parts are omitted.

As shown in FIG. 9, by adjusting the screwing amount of the adjusting screws 33a and 33b, the rotation angle of the head holder 25 with respect to the subcarriage 18 in the Z direction, that is, the nozzle surface of the recording head 6 and the Y direction of the platen 7 ( The parallelism around (main scanning direction) can be adjusted. Further fine adjustment is possible by making the pitches of the adjusting screws 33a and 33b finer, and the parallelism between the nozzle surface of the recording head 6 and the platen 7 can be adjusted with higher accuracy.

Further, as shown in FIGS. 5 and 6, since the adjusting screws 33a and 33b are provided on the left and right sides of the head holder 25, the adjustment amount can be changed on the left and right sides. Therefore, the parallelism between the nozzle surface of the recording head 6 and the platen 7 can be adjusted including the twist of the head holder 25 and / or the distortion of the sub-carriage 18.

Further, since the rotation of the head holder 25 around the rotation reference members 31a and 31b is restricted by the adjusting screws 33a and 33b, the head holder 25 rotates greatly and the nozzle surface of the recording head 6 comes into contact with the platen 7. Accidents can be prevented. Therefore, it is not necessary to use a jig or the like, and adjustment can be easily performed while actually measuring and checking on the actual machine.

In FIGS. 5 to 7, the head holder 25 is provided with the rotation reference member 31, and the sub-carriage 18 is provided with the shaft hole 32, but the present invention is not limited to this. Instead of this, the head holder 25 may be provided with a shaft hole, and the sub-carriage 18 may be provided with a rotation reference member. Further, the rotation reference member 31 may be configured to insert a pin-shaped member or may be configured to tighten a step screw.

Further, fixing means for fixing the sub-carriage 18 and the adjusting member 35 and / or fixing means for fixing the sub-carriage 18 and the head holder 25 may be provided.

Furthermore, in FIGS. 5 and 6, the sub-carriage 18 is sandwiched and held between the reference shaft 15 and the carriage 5, but is not limited thereto. Alternatively, as shown in FIG. 10, the subcarriage 18 may be hooked on the reference shaft 15 from the front and held. Further, the sub-carriage 18 may be held on the reference shaft 15 without the intervention of the adjusting member 35 (without using the adjusting member 35).

Subsequently, another embodiment of the present invention and an advantageous configuration will be described.

FIG. 11 is a schematic perspective view showing a carriage according to another embodiment of the present invention, and FIG. 12 is a schematic front view showing a carriage according to another embodiment of the present invention. In FIGS. 11 and 12, the same objects as those in FIGS. 5 and 6 are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 11 and 12, adjustment cams 40a and 40b may be provided as angle adjusting portions. The adjustment cams 40a and 40b are advantageous because they can improve the adjustment resolution as compared with the adjustment screws 33a and 33b.

FIG. 13 is a perspective view showing an example of the adjustment cam, and FIG. 14 is a schematic view showing an application example of the adjustment cam. As shown in FIG. 13, the adjusting cams 40a and 40b have a cam portion 41 and a shaft 42 eccentrically attached to the cam portion 41. Further, the cam portion 41 has a minus groove 43 for screwing. Then, as shown in FIG. 14, the cam portions 41 of the adjustment cams 40a and 40b are rotatably attached to the holding portions 18a and 18b of the subcarriage 18. By rotating the cam portion 41 of the adjustment cams 40a and 40b, the head holder 25 can be lifted (or lowered) by the shaft 42. Thereby, the rotation angle of the head holder 25 with respect to the sub-carriage 18 can be adjusted.

Further, an adjusting wedge member may be used as the angle adjusting unit. FIG. 15 is a perspective view showing an example of the adjusting wedge member, and FIG. 16 is a schematic view showing an application example of the adjusting wedge member. As shown in FIG. 15, the adjusting wedge members 44a and 44b have a wedge shape including a slope surface 45. Further, as shown in FIG. 16, the screws 46a and 46b attached to the holding portions 18a and 18b of the subcarriage 18 are rotated, and the adjusting wedge members 44a and 44b are pushed in to rotate the head holder 25 with respect to the subcarriage 18. The angle can be adjusted.

The angle adjusting portion is not limited to the adjusting screw 33, the adjusting cam 40, and the like. Any means that can regulate the rotation of the head holder 25 with respect to the sub-carriage 18 and adjust the rotation angle can be used. For example, a piezo actuator or the like can also be used.

Further, the reference shaft 15 may be fixed to the carriage 5 via adjusting plates 36a and 36b whose positions with respect to the carriage 5 can be adjusted. By adjusting the position of the reference shaft 15, the posture of the head holder 25 (tilt in the height direction, the rotation direction, and the main scanning direction) can be adjusted, and the mounting position accuracy of the recording head 6 can be improved.

Further, as shown in FIG. 12 (FIG. 17 as a side view), the cam member 38 may be provided on the reference shaft 15. The cam member 38 comes into contact with the adjusting member 35 at the contact surface 39, and positions the subcarriage 18 in the vertical direction. By rotating the cam member 38, the sub-carriage 18 can be raised and lowered, and the distance between the recording head 6 and the platen 7 can be changed. Therefore, the height of the recording head 6 can be adjusted according to the paper thickness and the like.

As a method of rotating the cam member 38, the cam member 38 can be rotated by fixing the cam member 38 to the reference shaft 15 and rotating the reference shaft 15. The means for rotating the reference shaft 15 may be manual, or a drive source may be arranged and the reference shaft 15 may be automatically rotated to raise or lower the recording head 6. In this method, the head raising and lowering of the carriage 5 can be operated from the outside.

By raising and lowering the head by the cam member 38, the distance between the recording head 6 and the platen 7 can be arbitrarily adjusted on the actual machine according to the printing medium, and the types of printing media that can be supported can be expanded.

Subsequently, a clear definition is given for the terms used in the present application.

The "liquid discharge device" is a device including a liquid discharge head or a liquid discharge unit, which drives the liquid discharge head to discharge the liquid. The device for discharging the liquid includes not only a device capable of discharging the liquid to a device to which the liquid can adhere, but also a device for discharging the liquid into the air or into the liquid.

This "liquid discharge device" can also include means related to feeding, transporting, and discharging paper to which a liquid can adhere, as well as a pretreatment device, a posttreatment device, and the like.

The "liquid ejection device" includes, for example, an image forming apparatus that ejects ink to form an image on paper, and a layered powder for forming a three-dimensional object (three-dimensional object). There is a three-dimensional modeling device (three-dimensional modeling device) that discharges the modeling liquid into the powder layer.

Further, the "liquid discharge device" is not limited to a device in which a significant image such as a character or a figure is visualized by the discharged liquid. For example, those that form patterns that have no meaning in themselves and those that form a three-dimensional image are also included.

The above-mentioned "thing to which a liquid can adhere" means a material to which a liquid can adhere at least temporarily, such as a material to which the liquid adheres and adheres, and a material to which the liquid adheres and permeates. Specific examples include paper, recording paper, recording paper, film, recorded media such as cloth, electronic substrates, electronic components such as piezoelectric elements, powder layers (powder layers), organ models, and media such as inspection cells. Yes, and includes everything to which the liquid adheres, unless otherwise specified.

The above "materials to which liquid can adhere" are temporary liquids such as paper, thread, fiber, fabric, leather, metal, plastic, glass, wood, ceramics, building materials such as wallpaper and flooring, and textiles for clothing. But it is good if it can be attached.

The "liquid" may have a viscosity and surface tension that can be discharged from the head, and is not particularly limited, but has a viscosity of 30 mPa · s or less at room temperature, under normal pressure, or by heating or cooling. It is preferable to have. More specifically, solvents such as water and organic solvents, colorants such as dyes and pigments, functionalizing materials such as polymerizable compounds, resins and surfactants, biocompatible materials such as DNA, amino acids and proteins, and calcium. , Solutions, suspensions, emulsions and the like containing edible materials such as natural pigments. These can be used, for example, in applications such as ink for inkjet, surface treatment liquid, liquid for forming electronic elements and light emitting elements, liquid for forming an electronic circuit resist pattern, and liquid for three-dimensional modeling.

Further, the "liquid discharge device" includes, but is not limited to, a device in which the liquid discharge head and the device to which the liquid can adhere move relatively. Specific examples include a serial type device that moves the liquid discharge head, a line type device that does not move the liquid discharge head, and the like.

In addition, as the "liquid ejection device", there is a processing liquid applying device that ejects the processing liquid onto the paper in order to apply the processing liquid to the surface of the paper for the purpose of modifying the surface of the paper. Further, there is also an injection granulation device for granulating fine particles of a raw material by injecting a composition liquid in which a raw material is dispersed in a solution through a nozzle.

The "liquid discharge unit" is a liquid discharge head integrated with functional parts and a mechanism, and is a collection of parts related to liquid discharge. For example, the "liquid discharge unit" includes a head tank, a carriage, a supply mechanism, a maintenance / recovery mechanism, a main scanning movement mechanism in which at least one of the configurations is combined with a liquid discharge head, and the like.

Here, the term "integration" means, for example, a liquid discharge head and a functional component, a mechanism in which the mechanism is fixed to each other by fastening, bonding, engagement, etc., or one in which one is movably held with respect to the other. include. Further, the liquid discharge head, the functional component, and the mechanism may be configured to be detachable from each other.

The main scanning movement mechanism shall include a single guide member. Further, the supply mechanism includes a single tube and a single loading unit.

The "liquid discharge head" is a functional device that discharges and ejects liquid from a nozzle. Piezoelectric actuators (laminated piezoelectric elements or thin film piezoelectric elements), thermal actuators that use electric heat conversion elements such as heat-generating resistors, and electrostatic actuators that consist of vibrating plates and counter electrodes are used as energy sources for discharging liquids. Be done.

In the present specification, "paper" is not limited to paper as a material, but includes OHP, cloth, glass, substrate, etc., and means a material to which ink droplets, other liquids, etc. can adhere, and is a recording medium. , Recording media, recording paper, recording paper, etc. are included. In addition, image formation, recording, printing, printing, and printing are all synonyms.

Unless otherwise specified, "ink" is not limited to what is called ink, but is a general term for all liquids that can form images, such as recording liquids, fixing treatment liquids, and liquids. Also included are, for example, DNA samples, resists, pattern materials, resins and the like.

The "image" is not limited to a two-dimensional image, but also includes an image given to a three-dimensionally formed object and an image formed by three-dimensionally modeling the three-dimensional object itself.

The present invention has been described in detail above using the embodiments. This embodiment is an example, and can be variously modified and used within a range that does not deviate from the gist.

1 Device body 2 Support stand 3 Guide rod 4 Guide stay 5, 56 Carriage 6a, 6b, 6c, 50 Recording head 7 Platen 8 Maintenance recovery device 9 Main cartridge 10 Main scanning mechanism 11 Drive motor 12 Drive pulley 13 Driven pulley 14 Timing Belt 15, 58 Reference shaft 18, 54 Sub-carriage 18a, 18b Holding part 20 Paper 21 Feeding means 25, 52 Head holder 31, 31a, 31b Rotation reference member 32, 32a, 32b Shaft hole 33, 33a, 33b Adjusting screw 35 Adjusting member 36a, 36b Adjusting plate 37 Subcarriage rotation reference 38 Cam member 39 Contact surface 40, 40a, 40b Adjusting cam 41 Cam part 42 Shaft 43 Minus groove 44a, 44b Adjusting wedge member 45 Gradient surface 46a, 46b Screw 60 Rotating shaft 62 Long hole 64 Fastener

Japanese Unexamined Patent Publication No. 2016-087873

Claims (7)

A liquid ejection head with multiple nozzles that eject droplets,
A head holder that holds one or more of the liquid discharge heads,
A sub-carriage that holds the head holder and
A carriage that holds the subcarriage and is movable in the main scanning direction is provided.
The carriage is provided with a reference member extending along the main scanning direction.
The sub-carriage is supported by the reference member and positioned on the carriage.
Provided on either the head holder or the sub-carriage,
A rotation reference member for rotating the head holder around the main scanning direction with respect to the sub-carriage, and
Provided on the other side of the head holder and the sub-carriage,
A shaft hole that rotatably supports the rotation reference member, and
In a liquid discharge device provided with an angle adjusting unit that regulates the rotation of the head holder with respect to the sub-carriage and adjusts the rotation angle .
The angle adjusting portion is an adjusting screw, and is characterized in that the thread portion of the adjusting screw is rotatably supported by the head holder and the screw tip is rotatably supported by the holding portion of the subcarriage. Liquid discharge device. A liquid ejection head with multiple nozzles that eject droplets,
A head holder that holds one or more of the liquid discharge heads,
A sub-carriage that holds the head holder and
A carriage that holds the subcarriage and is movable in the main scanning direction is provided.
The carriage is provided with a reference member extending along the main scanning direction.
The sub-carriage is supported by the reference member and positioned on the carriage.
Provided on either the head holder or the sub-carriage,
A rotation reference member for rotating the head holder around the main scanning direction with respect to the sub-carriage, and
Provided on the other side of the head holder and the sub-carriage,
A shaft hole that rotatably supports the rotation reference member,
In a liquid discharge device provided with an angle adjusting unit that regulates the rotation of the head holder with respect to the sub-carriage and adjusts the rotation angle.
The angle adjusting unit is a liquid discharge device characterized by being an adjusting cam. A liquid ejection head with multiple nozzles that eject droplets,
A head holder that holds one or more of the liquid discharge heads,
A sub-carriage that holds the head holder and
A carriage that holds the subcarriage and is movable in the main scanning direction is provided.
The carriage is provided with a reference member extending along the main scanning direction.
The sub-carriage is supported by the reference member and positioned on the carriage.
Provided on either the head holder or the sub-carriage,
A rotation reference member for rotating the head holder around the main scanning direction with respect to the sub-carriage, and
Provided on the other side of the head holder and the sub-carriage,
A shaft hole that rotatably supports the rotation reference member,
In a liquid discharge device provided with an angle adjusting unit that regulates the rotation of the head holder with respect to the sub-carriage and adjusts the rotation angle.
The angle adjusting unit is a liquid discharge device characterized by being an adjusting wedge member. The liquid discharge device according to any one of claims 1 to 3 , wherein the angle adjusting unit is provided at both ends of the head holder in the main scanning direction. The sub-carriage is supported by the reference member via an adjusting member and is supported by the reference member.
The adjustment member according to any one of claims 1 to 4 , wherein the adjusting member is rotatably supported with respect to the sub-carriage in a sub-scanning direction, and the inclination of the sub-carriage with respect to the reference member can be adjusted. Liquid discharge device. The liquid discharge device according to any one of claims 1 to 5 , wherein the reference member is fixed to the carriage via an adjusting plate for adjusting the position of the reference member with respect to the carriage. The liquid discharge device according to any one of claims 1 to 6 , wherein the reference member is provided with a cam member that comes into contact with the subcarriage and positions the subcarriage in the vertical direction.

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