CN217671775U

CN217671775U - Liquid discharge device

Info

Publication number: CN217671775U
Application number: CN202221587382.9U
Authority: CN
Inventors: 三轮笃史
Original assignee: Brother Industries Ltd
Current assignee: Brother Industries Ltd
Priority date: 2021-06-25
Filing date: 2022-06-23
Publication date: 2022-10-28
Anticipated expiration: 2032-06-23
Also published as: DE202022103502U1; FR3124431B3; JP3233791U; FR3124431A3

Abstract

The liquid discharge apparatus has a head unit, a support member, and an adjustment mechanism. The head unit includes a plurality of heads and a fixing member, and the plurality of heads are fixed to the fixing member. Each of the plurality of heads has a nozzle surface formed with a plurality of nozzles. The support member is configured to support the head unit. The adjustment mechanism is configured to adjust a position of the head unit with respect to the support member in a plurality of directions intersecting each other. The liquid discharge apparatus can sufficiently perform the positional alignment between the head unit and the support member.

Description

Liquid discharge device

Technical Field

The utility model relates to a liquid discharge device comprising a plurality of heads.

Background

JP-a-H08-197721 discloses an ink jet recording apparatus (liquid discharge device) including a plurality of recording heads (heads) fixed to a head fixing plate (fixing member) that is slightly rotated by an adjustment screw when the head fixing plate is attached to a head carriage (supporting member).

According to the configuration of JP-a-H08-197721, the position of the head unit including the plurality of heads and the fixing member relative to the support member can be adjusted only by slightly rotating the head fixing plate (fixing member) with the adjusting screw. In this case, the positional alignment between the head unit and the support member becomes insufficient, so that the recording quality may deteriorate.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a liquid discharge apparatus capable of sufficiently performing position alignment between a head unit and a support member.

The liquid discharge apparatus has a head unit, a support member, and an adjustment mechanism. The head unit includes: a plurality of heads; and a fixing member to which the plurality of heads are fixed. Each of the plurality of heads has a nozzle surface in which a plurality of nozzles are formed. The support member is configured to support the head unit. The adjustment mechanism is configured to adjust a position of the head unit with respect to the support member in a plurality of directions intersecting each other.

According to the liquid discharge apparatus, the adjustment mechanism is provided which is capable of adjusting the position of the head unit with respect to the support member in the plurality of directions, so that the positional alignment between the head unit and the support member can be sufficiently performed.

Preferably, the plurality of directions include a first direction along which the recording medium is relatively moved with respect to the head unit.

Preferably, the adjustment mechanism has a first adjustment unit configured to adjust a position of the head unit relative to the support member in the first direction, the first adjustment unit includes a shaft member that is fixed relative to the support member in the first direction and extends in the first direction, and a moving member that is fixed relative to the fixed member in the first direction and is supported by the shaft member so as to be movable in the first direction.

Preferably, the plurality of directions include a second direction, the second direction being parallel to the nozzle surface, and the second direction being orthogonal to a direction in which the recording medium relatively moves with respect to the head unit.

Preferably, the adjustment mechanism has a second adjustment unit configured to adjust a position of the head unit relative to the support member in the second direction, the second adjustment unit includes a slot that is fixed in the second direction relative to the fixing member and extends in the second direction, and a protrusion that is fixed in the second direction relative to the support member and is configured to be movable in the second direction in a state of being inserted into the slot.

Preferably, the plurality of directions includes a third direction, the third direction being orthogonal to the nozzle surface.

Preferably, the adjustment mechanism has a third adjustment unit configured to adjust a position of the head unit relative to the support member in the third direction, the third adjustment unit includes a slot that is fixed in the third direction relative to the fixing member and extends in the third direction, and a projection that is fixed in the third direction relative to the support member and is configured to be movable in the third direction in a state of being inserted in the slot.

Preferably, the adjustment mechanism has a fourth adjustment unit configured to adjust an angle of the head unit with respect to the support member by rotating the head unit with respect to the support member about a first rotation axis extending in a first direction along which the recording medium is relatively moved with respect to the head unit.

Preferably, the fourth adjustment unit includes a screw hole having an axial center along the first direction and a screw having a shaft portion extending in the first direction.

Preferably, the adjustment mechanism has a fifth adjustment unit configured to adjust an angle of the head unit with respect to the support member by rotating the head unit with respect to the support member about a second rotation axis extending in a second direction parallel to the nozzle surface and orthogonal to a direction in which the recording medium relatively moves with respect to the head unit.

Preferably, the fifth adjustment unit includes a screw hole having an axial center along the second direction, and a screw having a shaft portion extending in the second direction.

Preferably, the adjustment mechanism has a sixth adjustment unit configured to adjust an angle of the head unit with respect to the support member by rotating the head unit with respect to the support member about a third rotation axis extending along a third direction orthogonal to the nozzle surface.

Preferably, the sixth adjustment unit includes a screw hole having an axial center along the third direction, and a screw having a shaft portion extending in the third direction.

Preferably, at least a portion of the adjustment mechanism is made of aluminum.

Preferably, the support member has an attachment hole for attaching the liquid discharge apparatus to a packaging machine.

Drawings

Fig. 1 is a perspective view of a printer 100 according to a first embodiment.

Fig. 2 is a bottom view of the printer 100.

Fig. 3 is a top view of the printer 100.

Fig. 4 is a cross-sectional view of the printer 100 taken along line IV-IV of fig. 3.

Fig. 5 is a front view of the printer 100.

Fig. 6 is a cross-sectional view of the printer 100 taken along line VI-VI of fig. 5.

Fig. 7 is a cross-sectional view of the printer 100 taken along line VII-VII of fig. 5.

Fig. 8 is a perspective view of a printer 200 according to the second embodiment.

Fig. 9 is a top view of the printer 200.

Fig. 10 is a cross-sectional view of the printer 200 taken along line X-X of fig. 9.

Detailed Description

< first embodiment >

As shown in fig. 1, the printer 100 according to the first embodiment includes a head unit 10, a support member 30 configured to support the head unit 10, and an adjustment mechanism 50 capable of adjusting a position of the head unit 10 with respect to the support member 30.

The head unit 10 includes two heads 11 and a fixing part 12, and the two heads 11 are fixed to the fixing part 12.

The two heads 11 are aligned in the left-right direction (first direction D1). Although not shown, each head 11 includes a tank in which ink is stored, and a flow path member to which ink is supplied from the tank. The flow path member is formed with a flow path through which ink supplied from the tank flows. As shown in fig. 2, each head 11 has a nozzle surface 11N (lower surface of the flow path member) in which a plurality of nozzles 11N as the ends of the flow path are formed.

The left-right direction is a direction along a direction in which the recording medium relatively moves with respect to the head unit 10 (conveying direction). In the present embodiment, the head unit 10 is fixed at a fixed position, and a recording medium (e.g., a packaging material for food or the like) is conveyed from the right toward the left (conveying direction) by the drive of a conveying mechanism (not shown). When the packaging material passes under the two heads 11, ink is discharged from the nozzles 11n and the ink is dotted on the packaging material by driving of a driver IC (not shown), so that an image is recorded on the packaging material.

The two heads 11 are arranged offset in the front-rear direction (which is a direction orthogonal to the left-right direction and is the "second direction D2"). Both the front-rear direction and the left-right direction are parallel to the nozzle surface 11N (refer to fig. 2) and orthogonal to the vertical direction (third direction D3).

The fixing part 12 includes two housings 121, each housing 121 being configured to receive each head 11, and a side plate 123 fixed to a right side surface of one of the two housings 121 (the right housing 121). Each of the two heads 11 is box-shaped and can be attached to and detached from the housing 121 in the front-rear direction. The nozzle surface 11N of each head 11 is exposed through the opening 121x of each housing 121 (refer to fig. 2).

The support member 30 includes a support plate 31 and an attachment plate 32.

The support plate 31 is a substantially rectangular plate extending in the vertical direction and the left-right direction.

The attachment plate 32 is a substantially rectangular plate smaller in size than the support plate 31, and the attachment plate 32 is fixed to an upper portion of the support plate 31 and extends in a direction orthogonal to the vertical direction. The attachment plate 32 is provided with four attachment holes 32x for attaching the printer 100 to a packaging machine (not shown). In a state where the attachment plate 32 is fixed to a part of the packaging machine, the printer 100 including the attachment plate 32 can be attached to the packaging machine by inserting bolts into each of the attachment holes 32x and fastening the bolts.

The adjustment mechanism 50 is capable of adjusting the position of the head unit 10 with respect to the support member 30 in the left-right direction, the front-rear direction, and the vertical direction, and includes a first adjustment unit 51, a second adjustment unit 52, and a third adjustment unit 53, wherein the first adjustment unit 51 is configured to adjust the position in the left-right direction, the second adjustment unit 52 is configured to adjust the position in the front-rear direction, and the third adjustment unit 53 is configured to adjust the position in the vertical direction.

The first adjusting unit 51 includes two shaft members 511 and two linear bushes 512.

The two shaft members 511 are fixed to the support plate 31, extend in the left-right direction, respectively, and are separated from each other in the vertical direction. The two shaft members 511 are fixed to the support member 30 in the left-right direction.

The two linear bushes 512 are supported by the respective shaft members 511 so as to be movable in the left-right direction, and correspond to "moving members". The two linear bushes 512 are connected to each other by a connecting plate 532 extending in the vertical direction and the front-rear direction, and are in the same position in the left-right direction. The two linear bushes 512 are connected to the fixed member 12 via a member 531 or the like fixed to the front surface of the connecting plate 532, and are fixed in the left-right direction with respect to the fixed member 12.

The lever 513 is rotatably provided on a front surface of one of the two linear bushes 512 (the upper linear bush 512). The two linear bushes 512 are movable in the left-right direction with respect to the shaft member 511 when the end of the lever 513 is directed to the right, and the two linear bushes 512 are not movable in the left-right direction with respect to the shaft member 511 (i.e., fixed with respect to the shaft member 511) when the end of the lever 513 is directed to the down.

As shown in fig. 4, the second regulating unit 52 includes two slots 521x extending in the front-rear direction and two protrusions 522x, the two protrusions 522x being movable in the front-rear direction in a state where the two protrusions 522x are inserted in the respective slots 521 x.

The two slots 521x are formed on the lower surface of the member 521 so as to be separated from each other in the front-rear direction. The member 521 is a plate-shaped member elongated in the front-rear direction, and the member 521 is connected to the fixed member 12 via a member 541 or the like, and the member 521 is fixed in the front-rear direction with respect to the fixed member 12.

The two protrusions 522x are provided on the upper surface of a part of the member 522 supporting the member 521 so that the two protrusions are separated from each other in the front-rear direction. The member 522 is a plate-shaped member elongated in the front-rear direction, and the member 522 has a portion supporting the member 521, and a projection projecting upward from a left end of the portion (refer to fig. 1). The member 522 is connected to the support member 30 via the

members

531 and 532 and the like, and is fixed in the front-rear direction with respect to the support member 30.

The member 521 is supported by the member 522 so as to be movable in the front-rear direction, and is not movable in the front-rear direction with respect to the member 522 (i.e., fixed with respect to the member 521) by tightening the two bolts 523. The bolt 523 is inserted into a through hole penetrating the member 521 in the vertical direction and a recess formed on the upper surface of the member 521.

As shown in fig. 6, the third adjusting unit 53 includes two slots 531x extending in the vertical direction and two bosses 532x, wherein the two bosses 532x are movable in the vertical direction in a state where the two bosses 532x are inserted in the respective slots 531 x.

The two slots 531x are formed on the rear surface of the member 531 so as to be separated from each other in the vertical direction. As shown in fig. 4, the part 531 is elongated in the vertical direction and is connected to the part 522 at the rear end (i.e., the

parts

531 and 522 are integrated to constitute an L-shaped member). The part 531 is fixed in the vertical direction with respect to the fixed part 12.

The two convex portions 532x are provided on the front surface of the connection plate 532 so as to be separated from each other in the vertical direction. The connecting plate 532 is configured to connect the two linear bushes 512 as described above and is fixed in the vertical direction with respect to the support member 30.

The member 531 is supported by the member 532 so as to be movable in the vertical direction, and is not movable in the vertical direction with respect to the member 532 (i.e., fixed with respect to the member 532) by tightening one bolt 53. The bolt 533 is inserted into a through hole 531y penetrating the member 531 in the front-rear direction and a recess formed on the front surface of the member 532.

As shown in fig. 1, the adjustment mechanism 50 further includes a fourth adjustment unit 54 and a fifth adjustment unit 55, the fourth adjustment unit 54 and the fifth adjustment unit 55 adjusting the angle of the head unit 10 with respect to the support member 30.

The fourth adjustment unit 54 is configured to rotate the head unit 10 relative to the support member 30 about the first rotation axis X1 in the left-right direction, and has a screw hole 541X having an axial center in the left-right direction, and a screw 542 with an axial portion extending in the left-right direction.

The fifth adjusting unit 55 is configured to rotate the head unit 10 relative to the support member 30 about the second rotation axis X2 in the front-rear direction, and has a screw hole 551X having an axial center in the front-rear direction, and a screw 552 with an axial portion extending in the front-rear direction.

Here, a rectangular member 520 extending in the vertical direction and the left-right direction is fixed to the upper surface of the rear end of the member 521 (i.e., the

members

521 and 520 are integrated to constitute an L-shaped member). Rectangular members 551 extending in the vertical direction and the left-right direction are arranged on the front surface of the member 520. A rectangular section 541 extending in the vertical direction and the front-rear direction is fixed to the front surface of the left end of the section 551 (i.e., the

sections

551 and 541 are integrated to constitute an L-shaped member). The side plate 123 is disposed on the left side surface of the component 541.

As shown in fig. 7, screw holes 541x are formed in the side plate 123, and screw holes 551x are formed in the member 520. The side plate 123 has a projection configured to mate with the component 541. Screw holes 541x are formed as projections penetrating side plate 123. Member 520 has a projection configured to fit into member 551. Screw holes 551x are formed as projections through member 520.

By inserting the screw 542 into the screw hole 541X and rotating it, the head unit 10 including the side plate 123 is rotated about the first rotation axis X1 with respect to the member 541 (the member 541 is a member that cannot rotate about the first rotation axis X1 with respect to the support member 30). Then, the side plate 123 and the member 541 are fixed to each other by fastening the screw 542.

By inserting the screw 552 into the screw hole 551X and rotating it, the member 551 (member which cannot rotate about the second rotation axis X2 with respect to the head unit 10) is rotated about the second rotation axis X2 with respect to the member 520 (member which cannot rotate about the second rotation axis X2 with respect to the support member 30). Then, the member 551 and the member 520 are fixed to each other by tightening the screw 552.

The members constituting the respective adjusting units 51 to 55 are made of aluminum.

As described above, according to the present embodiment, there is provided the adjustment mechanism 50 (refer to fig. 1), which adjustment mechanism 50 is capable of adjusting the position of the head unit 10 with respect to the support member 30 in a plurality of directions (the left-right direction, the front-rear direction, and the vertical direction) intersecting each other. Thereby, the positional alignment between the head unit 10 and the support member 30 can be sufficiently performed.

The plurality of directions include a left-right direction (a first direction D1 along a direction in which the recording medium relatively moves with respect to the head unit 10 (conveying direction)). In this case, by adjusting the position of the head unit 10 in the left-right direction with respect to the support member 20, excessive adjustment of the discharge timing of ink from the nozzles 11n is not required, which can simplify the control.

The adjustment mechanism 50 has a first adjustment unit 51, and the first adjustment unit 51 is configured to adjust the position of the head unit 10 with respect to the support member 30 in the left-right direction (first direction D1). The first adjusting unit 51 includes a shaft member 511 and a linear bush 512 (moving member) (refer to fig. 1), the shaft member 511 being fixed in the left-right direction with respect to the supporting member 30 and extending in the left-right direction, the linear bush 512 being fixed in the left-right direction with respect to the fixing member 12 and being supported by the shaft member 511 so as to be movable in the left-right direction. In this case, the position adjustment of the head unit 10 with respect to the support member 30 in the left-right direction (the first direction D1) can be achieved with a relatively simple configuration.

The plurality of directions include a front-rear direction (a second direction D2 that is parallel to the nozzle surface 11N and orthogonal to a direction (conveyance direction) in which the recording medium relatively moves with respect to the head unit 10). In this case, by adjusting the position of the head unit 10 in the front-rear direction with respect to the support member 30, an image can be recorded at an appropriate position on the recording medium.

The adjustment mechanism 50 has a second adjustment unit 52, and the second adjustment unit 52 is configured to adjust the position of the head unit 10 with respect to the support member 30 in the front-rear direction (second direction D2). The second regulating unit 52 includes a slot 521x fixed in the front-rear direction with respect to the fixing member 12 and extending in the front-rear direction, and a boss 522x (refer to fig. 4) fixed in the front-rear direction with respect to the support member 30, and the boss 522x is configured to be movable in the front-rear direction in a state where the boss 522x is inserted in the slot 521 x. In this case, the position adjustment of the head unit 10 with respect to the support member 30 in the front-rear direction (second direction D2) can be achieved with a relatively simple configuration.

The plurality of directions include a vertical direction (a third direction D3 orthogonal to the nozzle surface 11N). In this case, by adjusting the position of the head unit 10 in the vertical direction with respect to the support member 30, the vertical interval between the head 11 and the recording medium can be appropriately secured, so that the jam can be suppressed.

The adjustment mechanism 50 has a third adjustment unit 53, and the third adjustment unit 53 is configured to adjust the position of the head unit 10 with respect to the support member 30 in the vertical direction (third direction D3). The third adjusting unit 53 includes a slot 531x and a boss 532x (refer to fig. 7), the slot 531x being fixed in the vertical direction with respect to the fixing member 12 and extending in the vertical direction, the boss 532x being fixed in the vertical direction with respect to the support member 30, and the boss 532x being configured to be movable in the front-rear direction in a state where the boss 532x is inserted in the slot 531 x. In this case, the position adjustment of the head unit 10 with respect to the support member 30 in the vertical direction (third direction D3) can be achieved with a relatively simple configuration.

The adjustment mechanism 50 further has a fourth adjustment unit 54 (refer to fig. 1), and the fourth adjustment unit 54 is capable of adjusting the angle of the head unit 10 with respect to the support member 30 by rotating the head unit 10 with respect to the support member 30 about the first rotation axis X1 in the left-right direction. In this case, by rotating the head unit 10 relative to the support member 30 to adjust the angle, high recording quality can be achieved.

The fourth adjustment unit 54 includes a screw hole 541x having an axial center along the left-right direction, and a screw 542 (refer to fig. 7) with a shaft portion extending in the left-right direction. In this case, the angle adjustment of the head unit 10 with respect to the support member 30 can be achieved with a relatively simple configuration.

The adjustment mechanism 50 further has a fifth adjustment unit 55 (refer to fig. 1), and the fifth adjustment unit 55 is capable of adjusting the angle of the head unit 10 with respect to the support member 30 by rotating the head unit 10 with respect to the support member 30 about the second rotation axis X2 in the front-rear direction. In this case, by rotating the head unit 10 relative to the support member 30 to adjust the angle, high recording quality can be achieved.

The fifth adjusting unit 55 includes a screw hole 551x having an axial center in the front-rear direction, and a screw 552 (refer to fig. 7) with a shaft portion extending in the front-rear direction. In this case, the angle adjustment of the head unit 10 with respect to the support member 30 can be achieved with a relatively simple configuration.

At least a portion of the adjustment mechanism 50 is made of aluminum. In this case, the adjustment mechanism 50 can be easily processed by cutting or the like, and the strength thereof can be ensured. In addition, the adjustment mechanism 50 becomes light, so that the operator can easily perform adjustment.

The support member 30 has an attachment hole 32x (refer to fig. 1), and the attachment hole 32x is used to attach the printer 100 to the wrapping machine. In this case, the printer 100 can be attached to a packaging machine to record images on various packaging media.

< second embodiment >

As shown in fig. 8, the printer 200 according to the second embodiment has substantially the same configuration as the printer 100 (refer to fig. 1) according to the first embodiment, but differs from the first embodiment in that the adjustment mechanism 50 further has a sixth adjustment unit 56, in addition to the first to fifth adjustment units 51 to 55, the sixth adjustment unit 56 being capable of adjusting the angle of the head unit 10 with respect to the support member 30.

The sixth adjustment unit 56 is configured to rotate the head unit 10 relative to the support member 30 about a third rotation axis X3 in the vertical direction, and includes a screw hole 561X having an axial center in the vertical direction, and a screw 562 with a shaft portion extending in the vertical direction.

In the first embodiment (refer to fig. 1), the member 520 is fixed to the upper surface of the rear end of the member 521, but in the second embodiment (refer to fig. 8), the member 520 is omitted and the L-shaped member 561 is fixed to the upper surface of the left end of the member 521. The L-shaped member 561 includes a vertical portion 561a extending in a vertical direction and a horizontal portion 561b extending in a direction orthogonal to the vertical direction. A lower end of the vertical part 561a is fixed to the member 520, and the horizontal part 561b extends leftward from an upper end of the vertical part 561 a.

In addition, an L-shaped member 563 is fixed to a lower surface of the horizontal portion 561b. The L-shaped member 563 includes a vertical portion 563a extending in a vertical direction and a horizontal portion 563b extending in a direction orthogonal to the vertical direction. The horizontal portion 563b is fixed to a lower surface of the horizontal portion 561b, and the vertical portion 563a extends downward from a rear end of the horizontal portion 563b. The member 551 is fixed to the lower end of the vertical portion 563 a.

The

members

551 and 563 cannot rotate about the third rotation axis X3 with respect to the head unit 10. The

members

561 and 521 are not rotatable about the third rotation axis X2 with respect to the support member 30.

As shown in fig. 10, screw holes 561x are formed in the horizontal portion 563b. The horizontal portion 563b has a protrusion configured to be engaged with the horizontal portion 561b. A screw hole 561x is formed for a projection penetrating the horizontal portion 563b.

By inserting the screw 562 into the screw hole 561X and rotating it, the member 563 (a member incapable of rotating about the third rotation axis X3 with respect to the head unit 10) is rotated about the third rotation axis X3 with respect to the member 561 (a member incapable of rotating about the third rotation axis X3 with respect to the support member 30). Then, the member 563 and the member 561 are fixed to each other by tightening the screw 562.

As described above, according to the present embodiment, in addition to similar effects based on the configurations similar to those of the first embodiment, the following effects are obtained.

The adjustment mechanism 50 has a sixth adjustment unit 56 (refer to fig. 8), and the sixth adjustment unit 56 is capable of adjusting the angle of the head unit 10 with respect to the support member 30 by rotating the head unit 10 with respect to the support member 30 about a third rotation axis X3 in the vertical direction. In this case, by rotating the head unit 10 relative to the support member 30 to adjust the angle, high recording quality can be achieved.

The sixth adjustment unit 56 includes a screw hole 561x having an axial center in the vertical direction, and a screw 562 (refer to fig. 10) with a shaft portion extending in the vertical direction. In this case, the angle adjustment of the head unit 10 with respect to the support member 30 can be achieved with a relatively simple configuration.

< modification example >

Although the preferred embodiments have been described, the present invention is not limited to the above-described embodiments, and can be variously designed and changed within the scope of the claims.

In the above-described embodiment, the number of heads included in the head unit is two, but may also be three or more.

The head may be any one of a serial type and a line type.

The liquid discharged from the nozzles is not limited to ink, and may be a liquid other than ink (for example, a processing liquid that coagulates or elutes components in ink).

The recording medium is not limited to the packaging material. In addition, the material constituting the recording medium may be any material (plastic, paper, cloth, etc.).

The present invention is not limited to printers, and can also be applied to facsimile machines, copiers, complex machines, and the like. Further, the present invention can also be applied to a liquid discharge apparatus used for applications other than image recording (for example, a liquid discharge apparatus configured to discharge a conductive liquid onto a substrate to form a conductive pattern).

Claims

1. A liquid discharge apparatus characterized by comprising:

a head unit including a plurality of heads and a fixing member, the plurality of heads being fixed to the fixing member, each of the plurality of heads having a nozzle surface in which a plurality of nozzles are formed;

a support member configured to support the head unit; and

an adjustment mechanism configured to adjust a position of the head unit relative to the support member in a plurality of directions intersecting each other.

2. The liquid discharge apparatus according to claim 1,

characterized in that the plurality of directions include a first direction along which the recording medium is relatively moved with respect to the head unit.

3. The liquid discharge apparatus according to claim 2,

characterized in that the adjustment mechanism has a first adjustment unit configured to adjust a position of the head unit with respect to the support member in the first direction, the first adjustment unit includes a shaft member fixed with respect to the support member in the first direction and extending in the first direction, and a moving member fixed with respect to the fixed member in the first direction and supported by the shaft member so as to be movable in the first direction.

4. The liquid discharge apparatus according to any one of claims 1 to 3,

characterized in that the plurality of directions include a second direction which is parallel to the nozzle surface and which is orthogonal to a direction in which the recording medium relatively moves with respect to the head unit.

5. The liquid discharge apparatus according to claim 4,

characterized in that the adjustment mechanism has a second adjustment unit configured to adjust a position of the head unit relative to the support member in the second direction, the second adjustment unit includes a slot that is fixed in the second direction relative to the fixing member and extends in the second direction, and a protrusion that is fixed in the second direction relative to the support member and is configured to be movable in the second direction in a state of being inserted into the slot.

6. The liquid discharge apparatus according to any one of claims 1 to 3,

characterized in that the plurality of directions comprises a third direction, the third direction being orthogonal to the nozzle surface.

7. The liquid discharge apparatus according to claim 6,

characterized in that the adjustment mechanism has a third adjustment unit configured to adjust the position of the head unit relative to the support member in the third direction, the third adjustment unit includes a slot that is fixed relative to the fixing member in the third direction and that extends in the third direction, and a projection that is fixed relative to the support member in the third direction and that is configured to be movable in the third direction in a state of being inserted in the slot.

8. The liquid discharge apparatus according to any one of claims 1 to 3,

characterized in that the adjustment mechanism has a fourth adjustment unit configured to adjust an angle of the head unit with respect to the support member by rotating the head unit with respect to the support member about a first rotation axis extending in a first direction along which the recording medium relatively moves with respect to the head unit.

9. The liquid discharge apparatus according to claim 8,

the fourth adjustment unit includes a screw hole having an axis along the first direction, and a screw having a shaft portion extending in the first direction.

10. The liquid discharge apparatus according to any one of claims 1 to 3,

characterized in that the adjustment mechanism has a fifth adjustment unit configured to adjust an angle of the head unit with respect to the support member by rotating the head unit with respect to the support member about a second rotation axis extending in a second direction parallel to the nozzle surface and orthogonal to a direction in which a recording medium relatively moves with respect to the head unit.

11. The liquid discharge apparatus according to claim 10,

characterized in that the fifth adjustment unit comprises a screw hole having an axial center along the second direction and a screw having a shaft portion extending in the second direction.

12. The liquid discharge apparatus according to any one of claims 1 to 3,

characterized in that the adjustment mechanism has a sixth adjustment unit configured to adjust an angle of the head unit relative to the support member by rotating the head unit relative to the support member about a third rotation axis extending along a third direction orthogonal to the nozzle surface.

13. The liquid discharge apparatus according to claim 12,

wherein the sixth adjustment unit includes a screw hole having an axis along the third direction and a screw having a shaft portion extending in the third direction.

14. The liquid discharge apparatus according to any one of claims 1 to 3,

characterized in that at least a part of the adjusting mechanism is made of aluminium.

15. The liquid discharge apparatus according to any one of claims 1 to 3,

characterized in that the support member has an attachment hole for attaching the liquid discharge apparatus to a packaging machine.