Printer

Abstract

To solve the problem of possible deformation.SOLUTION: A printer includes: a head unit base supporting a plurality of heads; a head unit base holding part having a first head unit base holding part for holding one end of the head unit base in the longitudinal direction of the head unit base, and a second head unit base holding part for holding the other end of the head unit base also in the longitudinal direction; a first fixing member for fixing the head unit base in the first head unit base holding part; and a second fixing member for fixing the head unit base in the second head unit base holding part. The head unit base is mounted on a first upper surface of the first head unit base holding part, and a second upper surface of the second head unit base holding part, and the head unit base is clamped in the longitudinal direction by the first fixing member and the second fixing member so as to fix the head unit base and the head unit base holding part.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a printing apparatus.

Background Art

[0002] Conventionally, as shown in Patent Document 1, an apparatus including a plurality of heads and a head unit that suppresses warping due to the heat of a heater has been known.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the apparatus described in Patent Document 1, there was a possibility of deformation due to the structure of the head unit.

Means for Solving the Problems

[0005] The printing device includes a head unit base that supports a plurality of heads, a first head unit base holding portion that holds one end of the head unit base in the longitudinal direction of the head unit base, and a second head unit base holding portion that holds the other end of the head unit base in the longitudinal direction of the head unit base. The head unit base holding portion is provided with a first fixing member that fixes the head unit base in the first head unit base holding portion and a second fixing member that fixes the head unit base in the second head unit base holding portion. The head unit base is placed on a first upper surface of the first head unit base holding portion and a second upper surface of the second head unit base holding portion, and the head unit base is clamped in the longitudinal direction by the first fixing member and the second fixing member, thereby fixing the head unit base and the head unit base holding portion.

Brief Description of the Drawings

[0006] [Figure 1] Schematic diagram showing the main part of the printing device as seen from the front end of the head unit. [Diagram 2] Perspective view showing the head unit. [Diagram 3] Cross-sectional view showing the front end of the head unit. [Figure 4] Perspective view showing the front end of the head unit with the first gap member removed. [Figure 5] Cross-sectional view showing the rear end of the head unit.

Embodiments for Carrying Out the Invention

[0007] Hereinafter, embodiments will be described with reference to the drawings. The directions in the drawings will be described using a three-dimensional coordinate system. For convenience of explanation, the positive direction of the Z-axis is referred to as the upward direction, the upper direction, or simply up, the negative direction is referred to as the downward direction, the lower direction, or simply down, the positive direction of the X-axis is referred to as the right direction, the right side, or simply right, the negative direction is referred to as the left direction, the left side, or simply left, the positive direction of the Y-axis is referred to as the backward direction, the rear side, or simply rear, and the negative direction is referred to as the forward direction, the front side, or simply front for explanation.

[0008] 1. Configuration of the printing device As shown in FIG. 1, the printing device 100 includes a plurality of head units 1, a carriage 4, and a conveyance unit 9. One head unit 1 includes a head 3, a head unit base 7, and a head unit base holder 8. Note that the head 3 is assumed to be composed of a plurality of heads. The head unit base 7 supports the head 3. The head unit base holder 8 mounts and holds the head unit base 7.

[0009] The carriage 4 mounts a plurality of head units 1. Specifically, a plurality of head unit bases 7 are respectively fixed to the carriage 4. That is, the head units 1 each formed by fixing the head unit base 7 and the head unit base holder 8 are respectively fixed to the carriage 4. The carriage 4 is attached to a carriage belt 5. The carriage 4 and the plurality of head units 1 fixed to the carriage 4 move left and right along the carriage axis 6 as the carriage belt 5 moves by a carriage motor (not shown). The head 3 mounted on and moving with the carriage 4 is called a so-called serial type head.

[0010] The head 3 is an inkjet type head and can eject ink droplets of each color such as CMYK (Cyan, Magenta, Yellow, Black), for example. Note that the ink colors can be any combination of four or more colors, including, for example, light and dark colors of CMYK. The head unit 1 ejects ink droplets from each head 3 while moving, and prints on the medium M below.

[0011] The transport unit 9 includes a transport roller, a transport motor (not shown), and the like, and transports the medium M in the left-right direction. The medium M may be any of plain paper, synthetic paper, film, cloth, and the like. 1, the longitudinal direction of the head unit base 7, which will be described later, is a direction intersecting the transport direction in which the medium M is transported by the transport unit 9, that is, the front-to-rear direction, and corresponds to the width direction of the medium M. The transport unit 9 may also be configured to transport the medium M in the front-to-rear direction. In this case, the longitudinal direction of the head unit base 7 is the transport direction in which the medium M is transported by the transport unit 9, that is, the front-to-rear direction, and corresponds to the length direction of the medium M. The printing device 100 may be configured to include a so-called line type head in which the head 3 is fixed, rather than a serial type.

[0012] 2. Head unit configuration 2 shows one head unit 1. In the following description, the front of the head unit 1 will be referred to as a front end A, and the rear of the head unit 1 will be referred to as a rear end B. The head unit 1 has a head unit main body 2 held by a head unit base holding portion 8. The head unit main body 2 is configured to include a head unit base 7 and a head 3. The head 3 is disposed below the head unit main body 2.

[0013] The head unit base holding portion 8 includes a first head unit base holding portion 8a and a second head unit base holding portion 8b, which are arranged as independent mechanisms at the front and rear. The head unit base 7 is bridged between a first head unit base holding portion 8a and a second head unit base holding portion 8b. Hereinafter, the front side of the head unit base 7 will be referred to as one end 7a, and the rear side will be referred to as the other end 7b.

[0014] In the front-back direction, which is the longitudinal direction of the head unit base 7, the first head unit base holding portion 8a holds one end 7a of the head unit base 7, and the second head unit base holding portion 8b holds the other end 7b of the head unit base 7.

[0015] The head unit base 7 is fixed to the first head unit base holding portion 8a by the first fixing member 10 at the front end A, and is fixed to the second head unit base holding portion 8b by the second fixing member 20 at the rear end B. The first fixing member 10 includes a first member 11 and a second member 12. The second fixing member 20 includes a third member 21 and a fourth member 22. Also, the head unit 1 arranges a first gap member 15 used when adjusting the height of the second member 12 at the front end A, and a second gap member 25 used when adjusting the height of the fourth member 22 at the front end B.

[0016] 2-1. Configuration of the Front End of the Head Unit Referring to FIGS. 3 to 4, the configuration of the front end A of the head unit 1 will be described in the order of attaching the head unit main body portion 2 to the head unit base holding portion 8. First, the first pin 16 fixed to the first head unit base holding portion 8a of the head unit base holding portion 8 is inserted into the first cylinder 16a of the head unit base 7 of the head unit main body portion 2 and positioned. One end 7a of the head unit base 7 of the head unit main body portion 2 is placed on the first upper surface 8c which is the upper surface of the first head unit base holding portion 8a.

[0017] As described above, the first fixing member 10 has a first member 11 and a second member 12. One end 7a of the head unit base 7 is fixed to the second member 12 by the fifth screw 17 from the first side surface 7c. That is, the second member 12 is fixed to the first side surface 7c of the head unit base 7. Note that one fifth screw 17 may be provided, but a plurality are preferably provided because a plurality can fix more stably. The first member 11 is fixed to the first upper surface 8c of the first head unit base holding portion 8a by the seventh screw 18. Note that one seventh screw 18 may be used, but a plurality are preferably provided because they can be fixed more stably. The second member 12 is to be disposed between the first side surface 7c of the head unit base 7 and the first member 11.

[0018] The first member 11 has a first surface 11a and a second surface 11b. The first surface 11a of the first member 11 is in contact with and fixed to the first upper surface 8c of the first head unit base holding portion 8a. The second surface 11b extends bent substantially at a right angle with respect to the first surface 11a and is continuous in a so-called L shape. The second member 12 has a third surface 12a, a fourth surface 12b, and a fourth contact surface 12d. The third surface 12a of the second member 12 is disposed to face the first side surface 7c of the head unit base 7. The fourth surface 12b is continuous with the third surface 12a in an L shape. The fourth contact surface 12d contacts the second surface 11b of the first member 11.

[0019] The fourth surface 12b of the second member 12 is disposed at a position facing the first upper surface 8c of the first head unit base holding portion 8a. Further, a third screw hole 14b described later is provided in the fourth surface 12b. The second surface 11b of the first member 11 is disposed to face the first side surface 7c of the head unit base 7 with the third surface 12a of the second member 12 interposed therebetween. That is, the first fixing member 10 includes the first member 11 fixed to the first upper surface 8c of the first head unit base holding portion 8a, the side surface of the head unit base 7, and when the side surface on the one end 7a side of the head unit base 7 in the longitudinal direction of the head unit base 7 is defined as the first side surface 7c, the second member 12 disposed between the first side surface 7c and the first member 11, and a first screw 13 described later.

[0020] The first gap distance change member that changes the distance between the first member 11 and the second member 12 is the first screw 13. The first screw 13 is inserted into a first screw hole 13a provided in the second surface 11b of the first member 11 and the third surface 12a of the second member 12. The first screw 13 can change the distance between the first member 11 and the second member 12. In other words, the first screw 13 can change the position of the second member 12 relative to the position of the first member 11 in the front-to-rear direction. The first screw 13 is temporarily fastened, so that the second member 12 can move relative to the first member 11. Although one first screw 13 is sufficient, it is preferable to provide a plurality of first screws 13 because this allows for more stable fixation.

[0021] 4, the fifth screw 17 can be guided by the elongated hole-shaped first guide 12c of the first member 11. As described above, one end 7a of the head unit base 7 is fixed to the second member 12 by the fifth screw 17. While the fifth screw 17 is guided by the first guide 12c of the first member 11, the one end 7a of the head unit base 7 can move up and down together with the second member 12. That is, the positions of the head unit base 7 and the second member 12 can be changed in the vertical direction relative to the positions of the first upper surface 8c of the first head unit base holding portion 8a and the first member 11.

[0022] A first gap member 15 is disposed between the first upper surface 8c of the first head unit base holding portion 8a and the fourth surface 12b of the second member 12, with a gap provided between the first gap member 15 and the fourth surface 12b. The third gap distance change member is a third screw 14 that is inserted into a third screw hole 14b of the second member 12. The third screw 14 can change so as to adjust the distance between a first gap member upper surface 15a, which is the upper surface of the first gap member 15, and the fourth surface 12b. Although one third screw 14 may be provided, it is preferable to provide a plurality of third screws 14 since this allows for more stable adjustment.

[0023] By changing the distance between the first gap member 15 and the fourth surface 12b with the third screw 14, the position of the second member 12 relative to the position of the first member 11 can be changed so as to be adjusted in the vertical direction. That is, the third screw 14 can be changed so as to adjust the height direction position of one end 7a of the head unit base 7 with respect to the first upper surface 8c of the first head unit base holding portion 8a. With the third screw 14, linear height adjustment is possible. Note that the third screw tip 14a of the third screw 14 moves in the vertical direction, and when moving downward, it contacts the first gap member upper surface 15a of the first gap member 15 and the downward movement stops.

[0024] The third screw 14 is changed so that the height direction position of one end 7a of the head unit base 7 with respect to the first upper surface 8c of the first head unit base holding portion 8a is adjusted. Thereafter, when the first screw 13 is fully tightened, the distance between the first member 11 and the second member 12 is fixed. Note that even if a gap is formed between the first head unit base holding portion 8a and the head unit base 7 by the third screw 14, the head unit base 7 can be placed on the first upper surface 8c of the first head unit base holding portion 8a via the first fixing member 10.

[0025] 2-2. Configuration of the Rear End of the Head Unit Referring to FIG. 5, the configuration of the rear end B of the head unit 1 will be described. Note that the configuration of the rear end B of the head unit 1 is symmetric to the configuration of the front end A of the head unit 1 described above. The second pin 26 fixed to the second head unit base holding portion 8b of the head unit base holding portion 8 is inserted into the second cylinder 26a of the head unit base 7 of the head unit main body portion 2 and positioned. The other end 7b of the head unit base 7 of the head unit main body portion 2 is placed on the second upper surface 8d which is the upper surface of the second head unit base holding portion 8b.

[0026] As described above, the second fixing member 20 has a third member 21 and a fourth member 22. The other end 7b of the head unit base 7 is fixed to the fourth member 22 by a sixth screw 27 from the second side surface 7d. That is, the fourth member 22 is fixed to the second side surface 7d of the head unit base 7. Note that one sixth screw 27 may be provided, but a plurality of them are preferably provided because they can be fixed more stably. The third member 21 is fixed to the second upper surface 8d of the second head unit base holding portion 8b by an eighth screw 28. Note that one eighth screw 28 may be provided, but a plurality of them are preferably provided because they can be fixed more stably. The fourth member 22 is to be disposed between the second side surface 7d of the head unit base 7 and the third member 21.

[0027] The third member 21 has a fifth surface 21a and a sixth surface 21b. The fifth surface 21a is fixed in contact with the second upper surface 8d of the second head unit base holding portion 8b. The sixth surface 21b is continuously L-shaped with respect to the fifth surface 21a. The fourth member 22 has a seventh surface 22a, an eighth surface 22b, and an eighth contact surface 22d. The seventh surface 22a faces the second side surface 7d of the head unit base 7. The eighth surface 22b is continuously L-shaped with respect to the seventh surface 22a. The eighth contact surface 22d contacts the sixth surface 21b of the third member 21.

[0028] The eighth surface 22b of the fourth member 22 is disposed at a position facing the second upper surface 8d of the second head unit base holding portion 8b. Further, a fourth screw hole 24b described later is provided in the eighth surface 22b. The sixth surface 21b of the third member 21 is disposed so as to face the second side surface 7d of the head unit base 7 with the seventh surface 22a of the fourth member 22 interposed therebetween. That is, the second fixing member 20 includes a third member 21 fixed to the second upper surface 8d of the second head unit base holding portion 8b, and a side surface of the head unit base 7. When the side surface on the other end 7b side of the head unit base 7 in the longitudinal direction of the head unit base 7 is defined as the second side surface 7d, a fourth member 22 disposed between the second side surface 7d and the third member 21, and a second screw 23 described later.

[0029] The second gap distance changing member for changing the distance between the third member 21 and the fourth member 22 is the second screw 23. The second screw 23 is inserted into second screw holes 23a provided in the sixth surface 21b of the third member 21 and the seventh surface 22a of the fourth member 22. The second screw 23 can change the distance between the third member 21 and the fourth member 22. That is, the second screw 23 can change the position of the fourth member 22 relative to the position of the third member 21 in the front-rear direction. Since the second screw 23 is temporarily fixed once, the fourth member 22 is movable relative to the third member 21. Note that one second screw 23 may be provided, but a plurality of second screws 23 are preferably provided because they can be fixed more stably.

[0030] The sixth screw 27 can be guided by the long hole-shaped second guide 22c of the third member 21. As described above, the other end 7b of the head unit base 7 is fixed to the fourth member 22 by the sixth screw 27. While the sixth screw 27 is guided by the second guide 22c of the third member 21, the other end 7b of the head unit base 7 can move in the vertical direction together with the fourth member 22. That is, the positions of the head unit base 7 and the fourth member 22 can be changed in the vertical direction relative to the second upper surface 8d of the second head unit base holding portion 8b and the position of the third member 21.

[0031] A second gap member 25 is disposed between the second upper surface 8d of the second head unit base holding portion 8b and the eighth surface 22b of the fourth member 22 with a gap provided between them and the eighth surface 22b. The fourth gap distance change member is a fourth screw 24 inserted into a fourth screw hole 24b of the fourth member 22. The fourth screw 24 can change so as to adjust the distance between a second gap member upper surface 25a, which is the upper surface of the second gap member 25, and the eighth surface 22b. Although one fourth screw 24 may be provided, it is preferable to provide a plurality of fourth screws 24 since this allows for more stable adjustment.

[0032] By changing the distance between the second gap member 25 and the eighth surface 22b with the fourth screw 24, the position of the fourth member 22 relative to the position of the third member 21 can be adjusted in the vertical direction. That is, the fourth screw 24 can be changed to adjust the height position of the other end 7b of the head unit base 7 relative to the second upper surface 8d of the second head unit base holding portion 8b. The fourth screw 24 allows linear height adjustment. The fourth screw tip 24a of the fourth screw 24 moves in the vertical direction, and when moving downward, it comes into contact with the second gap member upper surface 25a of the second gap member 25 and stops moving downward.

[0033] The height position of the other end 7b of the head unit base 7 relative to the second upper surface 8d of the second head unit base holding portion 8b is adjusted and changed by the fourth screw 24. Thereafter, the second screw 23 is fully tightened, thereby fixing the distance between the third member 21 and the fourth member 22. Furthermore, even if a gap is created between the second head unit base holding portion 8b and the head unit base 7 due to the fourth screw 24, the head unit base 7 can be placed on the second upper surface 8d of the second head unit base holding portion 8b via the second fixing member 20.

[0034] 2-3. Fixing each component inside the head unit As described above, at the front end A of the head unit 1, the first upper surface 8c, which is the upper surface of the first head unit base holding portion 8a, and at the rear end B of the head unit 1, the second upper surface 8d, which is the upper surface of the second head unit base holding portion 8b, can place and hold the head unit base 7. Also, with the above-described configuration, the head unit base 7 can be clamped in the longitudinal direction by the first fixing member 10 and the second fixing member 20, and the head unit base 7 and the head unit base holding portion 8 can be fixed.

[0035] As described above, at the front end A of the head unit 1, when adjusting the height by the third screw 14, even if a gap is formed between the first head unit base holding portion 8a and the head unit base 7, the head unit base 7 can be placed and held on the first upper surface 8c of the first head unit base holding portion 8a via the first member 11 and the second member 12 of the first fixing member 10. Similarly, at the rear end B of the head unit 1, when adjusting the height by the fourth screw 24, even if a gap is formed between the second head unit base holding portion 8b and the head unit base 7, the head unit base 7 can be placed and held on the second upper surface 8d of the second head unit base holding portion 8b via the third member 21 and the fourth member 22 of the second fixing member 20.

[0036] At the front end A of the head unit 1, by narrowing the distance between the first member 11 and the second member 12 of the first fixing member 10 with the first screw 13, the first member 11 and the first side surface 7c of the head unit base 7 can be fixed via the second member 12. Furthermore, by fixing the second side surface 7d of the head unit base 7 and the third member 21 of the second fixing member 20, the head unit base 7 can be clamped by the first fixing member 10 and the second fixing member 20.

[0037] On one hand, at the rear end B of the head unit 1, by narrowing the distance between the third member 21 and the fourth member 22 of the second fixing member 20 with the second screw 23, the third member 21 and the second side surface 7d of the head unit base 7 can be fixed via the fourth member 22. Furthermore, by fixing the first side surface 7c of the head unit base 7 and the first member 11 of the first fixing member 10, the head unit base 7 can be clamped between the first fixing member 10 and the second fixing member 20.

[0038] The head unit 1 of the printing apparatus 100 according to the above-described embodiment includes a head unit base 7 that supports the head 3, a first head unit base holding portion 8a, and a second head unit base holding portion 8b, and is provided with a head unit base holding portion 8 having the same. The first head unit base holding portion 8a holds one end 7a of the head unit base 7 in the front-rear direction which is the longitudinal direction of the head unit base 7. The second head unit base holding portion 8b holds the other end 7b of the head unit base 7 in the longitudinal direction of the head unit base 7. Furthermore, the head unit 1 includes a first fixing member 10 that fixes the head unit base 7 at the first head unit base holding portion 8a, and a second fixing member 20 that fixes the head unit base 7 at the second head unit base holding portion 8b.

[0039] The head unit 1 can place the head unit base 7 on the first upper surface 8c which is the upper surface of the first head unit base holding portion 8a and the second upper surface 8d which is the upper surface of the second head unit base holding portion 8b. Also, the head unit 1 can fix the head unit base 7 and the head unit base holding portion 8 by clamping the head unit base 7 in the longitudinal direction with the first fixing member 10 and the second fixing member 20.

[0040] As described above, the head unit base holding portion 8 of the head unit 1 includes a first head unit base holding portion 8a and a second head unit base holding portion 8b that are arranged one after the other as independent mechanisms. The head unit base 7 supports the head 3 having a plurality of heads. The first head unit base holding portion 8a and the second head unit base holding portion 8b place the head unit base 7 thereon before and after the head unit 1, respectively. When fixing the head unit base 7 to the head unit base holding portion 8, the head unit 1 can hold the head unit base 7 by sandwiching it from the longitudinal direction with the first fixing member 10 and the second fixing member 20.

[0041] By the way, when fixing the head unit base 7 to the head unit base holding portion 8, unlike the above-described embodiment, if it is fixed with a screw or the like from the vertical direction, the head unit base 7 may warp or deform. Also, even if the head unit base holding portion 8 is integrally formed, the head unit base 7 may deform. Thus, when different from the above-described embodiment, deformation may occur due to the structure of the head unit 1.

[0042] When the head unit base 7 deforms, the positions of the respective heads of the head 3 supported by the head unit base 7 may change. As a result, the landing position of the ink droplets ejected onto the medium may shift, and the print quality may deteriorate. According to the head unit 1 of the printing apparatus 100 according to the above-described embodiment, deformation of the head unit base 7 can be suppressed, and deterioration of print quality can be suppressed.

[0043] As described above, the embodiments have been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiments, and may be changed, replaced, deleted, etc. without departing from the gist of the present invention.

Explanation of Reference Numerals

[0044] 1… Head unit, 2… Main body of the head unit, 3… Head, 4… Carriage, 7… Head unit base, 7a… One end, 7b… The other end, 7c… First side, 7d… Second side, 8… Head unit base holding part, 8a… First head unit base holding part, 8b… Second head unit base holding part, 8c… First upper surface, 8d… Second upper surface, 10… First fixing member, 11… First member, 11a… First surface, 11b… Second surface, 12… Second member, 12a… Third surface, 12b… Fourth surface, 13… First screw, 13a… First screw hole, 14… Third screw, 14a… Third screw tip, 14b… Third screw hole, 15… First gap member, 15a… First gap member upper surface, 17… Fifth screw, 18… Seventh screw, 20… Second fixing member, 21… Third member, 21a… Fifth surface, 21b… Sixth surface, 22… Fourth member, 22a… Seventh surface, 22b… Eighth surface, 23… Second screw, 23a… Second screw hole, 24… Fourth screw, 24a… Fourth screw tip, 24b… Fourth screw hole, 25… Second gap member, 25a… Second gap member upper surface, 27… Sixth screw, 28… Eighth screw, 100… Printing device, M… Medium.

Claims

1. A head unit base that supports a plurality of heads, a first head unit base holding portion that holds one end of the head unit base in the longitudinal direction of the head unit base, and a second head unit base holding portion that holds the other end of the head unit base in the longitudinal direction of the head unit base, a head unit base holding portion having: a first fixing member that fixes the head unit base in the first head unit base holding portion; a second fixing member that fixes the head unit base in the second head unit base holding portion; comprising: The head unit base is placed on a first upper surface of the first head unit base holding portion and a second upper surface of the second head unit base holding portion, and the head unit base is clamped in the longitudinal direction by the first fixing member and the second fixing member, thereby fixing the head unit base and the head unit base holding portion. A printing apparatus characterized by that.

2. The first fixing member a first member fixed to the first upper surface of the first head unit base holding portion; a second member disposed between the first side surface and the first member when a side surface of the head unit base on the one end side of the head unit base in the longitudinal direction of the head unit base is defined as a first side surface; a first gap distance changing member that changes the distance between the first member and the second member; having: The second fixing member has a third member disposed at a position facing the second side surface and fixed to the second upper surface of the second head unit base holding portion when a side surface of the head unit base on the other end side of the head unit base in the longitudinal direction of the head unit base is defined as a second side surface. The second member is fixed to the first side surface, By narrowing the distance between the first member and the second member by the first gap distance changing member, the first member and the first side surface are fixed via the second member, and the second side surface and the third member are fixed. The printing apparatus according to claim 1, wherein the head unit base is clamped by the first fixing member and the second fixing member.

3. The second fixing member the third member, A fourth member that is located between the second side surface and the third member and is fixed to the second side surface; A second gap distance changing member that changes the distance between the third member and the fourth member; and has By narrowing the distance between the third member and the fourth member with the second gap distance changing member, the third member and the second side surface are fixed via the fourth member, and the head unit base is sandwiched between the first fixing member and the second fixing member. The printing apparatus according to claim 2, characterized in that

4. The first member has a first surface fixed to the first upper surface of the first head unit base holding portion and a second surface that is continuously L-shaped with the first surface; The second member has a third surface facing the first side surface; The printing apparatus according to claim 3, characterized in that the second surface is disposed so as to face the first side surface with the third surface interposed therebetween.

5. The printing apparatus according to claim 4, characterized in that the first gap distance changing member is a screw and is inserted into screw holes provided in the second surface and the third surface.

6. The second member has a third surface and a fourth surface that is continuously L-shaped with the third surface; The fourth surface is disposed so as to face the first upper surface of the first head unit base holding portion; Between the first upper surface of the first head unit base holding portion and the fourth surface, there is a gap member disposed on the first upper surface of the first head unit base holding portion with a gap provided between the fourth surface; It has a third gap distance changing member that changes the distance between the upper surface of the gap member and the fourth surface; The printing apparatus according to claim 4, characterized in that by changing the distance between the gap member and the fourth surface with the third gap distance changing member, the height direction position of the head unit base with respect to the first head unit base holding portion can be changed.

7. The printing apparatus according to claim 6, characterized in that the third gap distance changing member is a screw, is inserted into a screw hole provided in the fourth surface, and the tip of the screw contacts the upper surface of the gap member.

8. Comprising a carriage that holds a plurality of the head unit bases The printing apparatus according to any one of claims 1 to 7, characterized in that the plurality of the head unit bases are each fixed to the carriage in a head unit unit in which the head unit base and the head unit base holding portion are fixed.

Images