JP7248542B2 - inkjet printer - Google Patents

Description

The present invention relates to inkjet printers.

2. Description of the Related Art Conventionally, inkjet printers using photocurable ink (hereinafter sometimes simply referred to as "photocurable printers") have been known. A photocurable printer ejects photocurable ink (eg, ultraviolet curable ink) from an ink head, and irradiates the ejected photocurable ink with light (eg, ultraviolet rays) from a light irradiation device. As a result, the photocurable ink is quickly cured on the recording medium to form an ink layer, and a desired image can be printed.

Here, in a photocuring printer, it is necessary to prevent light (typically ultraviolet light) from leaking outside the body case. The inkjet printer disclosed in Patent Document 1 includes a front member (hereinafter referred to as a member for suppressing light leakage to the outside of the main body case) that suppresses ultraviolet rays from leaking to the outside in front of a platen on which a recording medium is placed. A cover for suppressing leaked light.) is provided.

Japanese Unexamined Patent Application Publication No. 2011-31600

By the way, examples of recording media used in photocurable printers include relatively thin recording paper, relatively thick corrugated cardboard, glass plates, and the like. In the technique described in Patent Document 1, the recording paper is discharged along the platen, and the glass plate is discharged after passing through the leakage light suppression cover. According to the leakage light suppression cover described in Patent Document 1, it is possible to suppress leakage of light to the outside of the main body case, but it is desired to arrange the leakage light suppression cover more compactly and with a high degree of freedom. there is

SUMMARY OF THE INVENTION The present invention has been made in view of such a point, and an object thereof is to provide an inkjet printer capable of suppressing leakage of light to the outside without depending on the thickness of a recording medium used for printing.

The inventors of the present application have found that, in order to effectively suppress leakage of light to the outside of the main body case, it is preferable to change the mounting angle of the leakage light suppression cover according to the thickness of the recording medium.

An inkjet printer according to the present invention includes a base member, a platen provided on the base member on which a recording medium is placed, and a platen provided on the base member, positioned above the platen and movable in a main scanning direction. a carriage, an ink head mounted on the carriage and ejecting photocurable ink onto the recording medium conveyed in a sub-scanning direction perpendicular to the main scanning direction; a light irradiation device that irradiates light toward the applied photocurable ink; and an opening formed between the platen and downstream of the carriage in the sub-scanning direction. a main body case, a front cover attached to the base member or the main body case for opening and closing the opening, and preventing light emitted from the light irradiation device from leaking to the outside from between the front cover and the platen. and a leakage light suppressing cover having a suppressing shielding portion and attached to the base member or the main body case. The leakage light suppression cover is configured such that its angle with respect to the front cover can be changed according to the thickness of the recording medium placed on the platen.

In the ink jet printer of the present invention, the leakage light suppression cover is configured so that the angle with respect to the front cover can be changed according to the thickness of the recording medium placed on the platen. As a result, for example, when the thickness of the recording medium is relatively thin or relatively thick, the light irradiated from the light irradiation device is prevented from leaking to the outside from between the front cover and the platen. In addition, the angle of the leakage light suppression cover with respect to the front cover can be appropriately set.

According to the present invention, it is possible to provide an inkjet printer capable of suppressing light leaking to the outside without depending on the thickness of the recording medium used for printing.

1 is a perspective view of a printer according to one embodiment; FIG. 1 is a front view showing a printer according to one embodiment; FIG. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2; 1 is a rear view of a printer according to one embodiment; FIG. 4 is a bottom view showing an ink head unit according to one embodiment; FIG. 3 is a partially enlarged cross-sectional view taken along line BB in FIG. 2; FIG. FIG. 4 is a plan view showing a state in which the downstream side leakage light suppression cover according to one embodiment is in contact with the first detection sensor; It is a mimetic diagram showing the state where a part of the 1st detection sensor concerning one embodiment and the slot formed in the vertical wall overlap with side view. FIG. 11 is a side view showing a state in which the downstream side leakage light suppression cover according to one embodiment is in contact with the first detection sensor; FIG. 5 is a perspective view showing a state before attaching a downstream side leakage light suppression cover according to one embodiment to a second right side frame; FIG. 5 is a perspective view showing a state before attaching a downstream side leakage light suppression cover according to one embodiment to a second right side frame; FIG. 3 is a perspective view of a support member according to one embodiment; 1 is a perspective view of a printer according to one embodiment; FIG. 1 is a front view showing a printer according to one embodiment; FIG. FIG. 15 is a cross-sectional view taken along line CC in FIG. 14; FIG. 15 is a cross-sectional view taken along line DD in FIG. 14; FIG. 4 is a plan view showing a state in which the downstream side leakage light suppression cover according to one embodiment is in contact with the first detection sensor; FIG. 11 is a side view showing a state in which the downstream side leakage light suppression cover according to one embodiment is in contact with the first detection sensor; It is a perspective view which shows some guide tables which concern on one Embodiment. It is a perspective view which shows the peripheral structure of the 2nd detection sensor which concerns on one Embodiment. It is a perspective view showing the 2nd detection sensor concerning one embodiment. FIG. 4 is a perspective view showing a state in which the first leakage light suppression cover according to one embodiment is positioned at the closed position; FIG. 10 is a perspective view showing a state in which a pressing member of the first leakage light suppression cover according to one embodiment is in contact with the second detection sensor; 1 is a rear view of a printer according to one embodiment; FIG. FIG. 11 is a perspective view showing a state in which a second leakage light suppression cover according to one embodiment is attached; FIG. 11 is a perspective view showing a state in which a pressing member of a second leakage light suppression cover according to one embodiment is in contact with a second detection sensor;

An inkjet printer (hereinafter simply referred to as "printer") according to an embodiment of the present invention will be described below with reference to the drawings. It should be noted that the embodiments described herein are, of course, not intended to limit the invention in particular. Further, members and portions having the same function are denoted by the same reference numerals, and overlapping descriptions are appropriately omitted or simplified.

FIG. 1 is a perspective view showing a printer 10 according to this embodiment. As shown in FIG. 1, the printer 10 prints on the recording medium 5 . The recording medium 5 is, for example, recording paper. However, the recording medium 5 is not limited to recording paper. As the recording medium 5, in addition to papers such as plain paper and ink-jet printing paper, relatively thin sheets such as sheets made of resin materials such as polyvinyl chloride (PVC) and polyester, aluminum, iron, etc. metal plates, glass plates, wood plates, corrugated cardboard, etc., which are relatively thick. The relatively thin recording medium 5 is wound into a roll, for example. In the following description, among the recording media 5, a relatively thin medium such as recording paper is referred to as a recording medium 5A, and among the recording media 5, a relatively thick medium such as cardboard is referred to as a recording medium 5B. The recording medium 5A is an example of a medium having a thickness equal to or less than a predetermined thickness, and the recording medium 5B is an example of a medium having a thickness greater than the predetermined thickness.

In the following description, left, right, top, and bottom refer to left, right, top, and bottom as seen from the operator in front of the printer 10, respectively. Also, when the operator faces the front of the printer 10, the direction from the rear of the printer 10 to the operator is the front, and the direction from the operator to the rear of the printer 10 is the rear. Symbols F, Rr, L, R, U, and D in the drawings represent front, rear, left, right, up, and down, respectively. An ink head unit 20 (see FIG. 2), which will be described later, is provided so as to be movable leftward and rightward. When the rear side of the printer 10 is called the upstream side and the front side of the printer 10 is called the downstream side, the recording medium 5 is conveyed from the upstream side toward the downstream side. In this embodiment, the moving direction of the ink head unit 20 is called the main scanning direction Y, and the conveying direction of the recording medium 5 is called the sub-scanning direction X. As shown in FIG. Here, the main scanning direction Y corresponds to the left-right direction, and the sub-scanning direction X corresponds to the front-rear direction. The main scanning direction Y and the sub-scanning direction X are orthogonal. However, the main scanning direction Y and the sub-scanning direction X are not particularly limited, and can be appropriately set according to the form of the printer 10 and the like.

As shown in FIG. 1, the printer 10 includes a base member 40 having a main body portion 40A extending in the main scanning direction Y, a platen 15 on which the recording medium 5 is placed, a main body case 50, a right leg portion 16R, It comprises a left leg 16L, an ink head unit 20 (see FIG. 2), a medium support device 12 (see FIG. 2), and a control device 100. FIG. The right leg portion 16R and the left leg portion 16L are attached to the lower portion of the base member 40 (here, the body portion 40A). The right leg portion 16R and the left leg portion 16L support the base member 40 . The medium support device 12 is a member that supports the recording medium 5 wound in a roll.

As shown in FIG. 1, the base member 40 includes a main body portion 40A, a first left side frame 41L, a first right side frame 41R, a second left side frame 42L, and a second right side frame 42R. ing. The first left side frame 41L is arranged to the left of the platen 15 and extends upward from the main body portion 40A. The first right side frame 41R is arranged to the right of the platen 15 and extends upward from the main body portion 40A. The second left side frame 42L is provided to the left of the platen 15 and to the right of the first left side frame 41L, and extends vertically. The second left side frame 42L extends upward and forward from the body portion 40A. The second right side frame 42R is provided to the right of the platen 15 and to the left of the first right side frame 41R, and extends vertically. The second right side frame 42R extends upward and forward from the body portion 40A. The second left side frame 42L and the second right side frame 42R are examples of vertical walls.

As shown in FIG. 1, the platen 15 supports the recording medium 5 during printing on the recording medium 5 . A recording medium 5 is placed on the platen 15 . The platen 15 extends in the main scanning direction Y. As shown in FIG. The platen 15 is provided on the base member 40 . The platen 15 is provided in the central portion of the base member 40 . The platen 15 is supported by the body portion 40A of the base member 40. As shown in FIG. The platen 15 is arranged between the second left side frame 42L and the second right side frame 42R while being in contact with the second left side frame 42L and the second right side frame 42R. As shown in FIG. 3, the platen 15 includes a first platen 15A having a flat upper surface and an upper surface inclined downward from the rear to the front (that is, from the upstream side to the downstream side in the sub-scanning direction X). It has a second platen 15B and a third platen 15C whose upper surface is tilted obliquely downward from the front to the rear (that is, from the downstream side to the upstream side in the sub-scanning direction X). A second platen 15B and a third platen 15C guide the movement of the recording medium. The second platen 15B is arranged in front of the first platen 15A (that is, downstream in the sub-scanning direction X). The third platen 15C is arranged behind the first platen 15A (that is, upstream in the sub-scanning direction X).

As shown in FIG. 1 , the body case 50 is attached to the base member 40 . The body case 50 is formed in a box shape. The body case 50 includes an upper wall 51, a front wall 52, a left front cover 54L, a right front cover 54R, a left wall 55L (see FIG. 3), a right wall 55R, a rear wall 56 (see FIG. 3), and a lower wall 57 (see FIG. 3). As shown in FIG. 3, a first opening 58A and a second opening 58B are formed between the body case 50 and the platen 15. As shown in FIG. The first opening 58A is formed in front of the carriage 22 of the ink head unit 20, which will be described later. The second opening 58B is formed behind the carriage 22 . The first opening 58A and the second opening 58B communicate. The first opening 58A is an example of an opening.

As shown in FIG. 1, the upper wall 51 extends in the main scanning direction Y. As shown in FIG. The upper wall 51 is positioned above the base member 40 . The upper wall 51 is arranged above the ink head unit 20 . The front wall 52 extends obliquely forward and downward from the front end of the upper wall 51 . The front wall 52 extends in the main scanning direction Y. As shown in FIG. The front wall 52 is located between the left front cover 54L and the right front cover 54R. As shown in FIG. 3, the first opening 58A is formed, for example, between the front wall 52 and the second platen 15B.

The left side wall 55L is arranged to extend upward from the left end of the main body portion 40A of the base member 40 . The left side wall 55L connects the left end of the top wall 51, the left end of the left front cover 54L, and the left end of the rear wall 56. As shown in FIG. As shown in FIG. 1, the right side wall 55R is arranged to extend upward from the right end of the main body portion 40A of the base member 40. As shown in FIG. The right wall 55R connects the right end of the top wall 51, the right end of the right front cover 54R, and the right end of the rear wall 56. As shown in FIG.

As shown in FIG. 4, the rear wall 56 extends downwardly from the rear end of the top wall 51 . As shown in FIG. 3, the lower wall 57 extends forward from the lower portion of the rear wall 56 . The lower wall 57 is connected to the second left side frame 42L and the second right side frame 42R of the base member 40 (see FIG. 6). The bottom wall 57 is positioned above the platen 15 . The second opening 58B is formed, for example, between the lower wall 57 and the third platen 15C.

As shown in FIG. 1, the left front cover 54L extends diagonally forward and downward from the front end of the left portion of the upper wall 51 . The left front cover 54L is configured to be openable and closable around the front end of the upper wall 51 . The left front cover 54L is arranged to the left of the platen 15. As shown in FIG. The right front cover 54R extends diagonally forward and downward from the front end of the right portion of the upper wall 51 . The right front cover 54R is configured to be openable and closable around the front end of the upper wall 51 . The right front cover 54R is arranged to the right of the platen 15. As shown in FIG.

As shown in FIG. 2, the printer 10 has a central wall 17 extending in the main scanning direction Y and in the vertical direction. Central wall 17 is supported by base member 40 . A central wall 17 is positioned above the platen 15 . Between the central wall 17 and the platen 15, a gap 15H (see FIG. 3) is formed through which the recording medium 5 can pass. The central wall 17 is housed in the body case 50 .

As shown in FIG. 2, the printer 10 has guide rails 18 . The guide rail 18 extends in the main scanning direction Y. As shown in FIG. A guide rail 18 is provided on the central wall 17 . The guide rail 18 is arranged above the platen 15 .

As shown in FIG. 2, the ink head unit 20 is provided on the base member 40. As shown in FIG. The ink head unit 20 is arranged inside the body case 50 . The ink head unit 20 is arranged above the platen 15 . The ink head unit 20 includes a carriage 22, a plurality of ink heads 24 (see FIG. 5) mounted on the carriage 22, and ultraviolet irradiation devices 26A and 26B. The ultraviolet irradiation devices 26A and 26B are examples of light irradiation devices. The carriage 22 is provided on the base member 40 . The carriage 22 is positioned above the platen 15 . Carriage 22 is engaged with guide rail 18 . The carriage 22 is configured to be movable in the main scanning direction Y along the guide rails 18 .

As shown in FIG. 2, the printer 10 has a carriage movement mechanism 30. As shown in FIG. The carriage movement mechanism 30 is a mechanism that moves the carriage 22 in the main scanning direction Y relative to the recording medium 5 placed on the platen 15 . Note that the configuration of the carriage moving mechanism 30 is not particularly limited. The carriage moving mechanism 30 includes a first pulley 31 , a second pulley 32 , an endless belt 33 and a carriage motor 34 . The first pulley 31 is provided on the left end side of the guide rail 18 . The second pulley 32 is provided on the right end side of the guide rail 18 . The belt 33 is wound around the first pulley 31 and the second pulley 32 . The belt 33 is fixed to the upper back surface of the carriage 22 . A carriage motor 34 is connected to the second pulley 32 . However, the carriage motor 34 may be connected to the first pulley 31 . Here, the belt 33 runs between the first pulley 31 and the second pulley 32 by driving the carriage motor 34 and rotating the second pulley 32 . As a result, the carriage 22 moves in the main scanning direction Y. As shown in FIG.

As shown in FIG. 5, the ink head 24 is shaped such that the length in the sub-scanning direction X is longer than the length in the main scanning direction Y. As shown in FIG. A plurality of ink heads 24 (three in this embodiment) are formed to have the same shape and size. The ink head 24 has a plurality of first nozzles 24A arranged in the sub-scanning direction X, a plurality of second nozzles 24B arranged in the sub-scanning direction X, and a nozzle surface 24C formed with the first nozzles 24A and the second nozzles 24B. I have. Since the first nozzles 24A and the second nozzles 24B are minute, the plurality of first nozzles 24A and the plurality of second nozzles 24B are represented by straight lines in FIG. A first nozzle 24A and a second nozzle 24B of the ink head 24 eject photocurable ink onto the recording medium 5 . In this embodiment, the printer 10 has three ink heads 24, but the number of ink heads 24 is not limited to three.

As shown in FIG. 1, the printer 10 includes a cartridge housing section 19 that houses ink cartridges. The cartridge housing portion 19 is provided in the body case 50 . The cartridge housing portion 19 is provided on the upper wall 51 of the main body case 50 . The ink head 24 (see FIG. 5) communicates with an ink cartridge (not shown) housed in the cartridge housing portion 19 . Photocurable ink is stored in each of the ink cartridges.

Photocurable ink has the property of being cured when exposed to light (for example, ultraviolet rays). A photocurable ink (for example, an ultraviolet curable ink) contains a colorant such as a pigment, a photopolymerizable monomer, and a photopolymerization initiator system, and optionally other various additives such as a photosensitizer, polymerization Inhibitors, scavengers, antioxidants, UV absorbers, plasticizers, surfactants, leveling agents, thickeners, dispersants, defoamers, preservatives, solvents and the like may be included. Photocurable inks are, for example, process color inks, white inks, gloss inks, and metallic inks. For example, process color inks include cyan ink, magenta ink, yellow ink, black ink, light cyan ink, light magenta ink, and the like.

The ultraviolet irradiation devices 26A and 26B irradiate the photocurable ink ejected onto the recording medium 5 with ultraviolet rays. An ink layer is thereby formed on the recording medium 5 . The ultraviolet irradiation devices 26A and 26B are mounted on both sides of the carriage 22 in the main scanning direction Y, respectively. The ultraviolet irradiation devices 26A and 26B are positioned above the platen 15. As shown in FIG. As shown in FIG. 5, the ultraviolet irradiation device 26A is arranged to the left of the ink head 24. As shown in FIG. The ultraviolet irradiation device 26B is arranged to the right of the ink head 24. As shown in FIG.

As shown in FIG. 3, the printer 10 has a medium moving mechanism 35. As shown in FIG. The medium moving mechanism 35 relatively moves the recording medium 5 placed on the platen 15 in the sub-scanning direction X with respect to the ink head unit 20 . The medium moving mechanism 35 moves the recording medium 5 placed on the platen 15 in the sub-scanning direction X. As shown in FIG. The medium moving mechanism 35 includes a plurality of grit rollers 36 (see also FIG. 1) and a plurality of pinch rollers 37 (see also FIG. 2).

As shown in FIG. 1, the grit roller 36 is provided on the platen 15 . The grit roller 36 is embedded in the platen 15 so that the upper portion of the grit roller 36 is exposed to the outside. The grit rollers 36 are arranged in parallel in the main scanning direction Y. As shown in FIG. The grit roller 36 is arranged below the pinch roller 37 . The grit roller 36 sandwiches the recording medium 5 between itself and the pinch roller 37 . With the recording medium 5 sandwiched between the grit roller 36 and the pinch roller 37, when a feed motor (not shown) connected to the grit roller 36 is driven to rotate the grit roller 36, the recording medium 5 is It is conveyed in the sub-scanning direction X.

As shown in FIG. 2, the pinch rollers 37 are arranged above the platen 15 . The pinch rollers 37 are arranged below the guide rails 18 . The pinch roller 37 is arranged at a position facing the grit roller 36 . The pinch roller 37 presses the recording medium 5 placed on the platen 15 from above.

As shown in FIG. 1, the printer 10 has a front cover 60. As shown in FIG. The front cover 60 opens and closes the first opening 58A (see FIG. 3). As shown in FIG. 3, when the front cover 60 closes the first opening 58A, the front cover 60 inclines obliquely downward from the rear to the front. The front cover 60 is provided on the base member 40 . The front cover 60 is supported by the first left side frame 41L (see FIGS. 1 and 3) and the first right side frame 41R (see FIG. 6) of the base member 40. As shown in FIG. The front cover 60 is rotatably supported by the first left side frame 41L and the first right side frame 41R. The front cover 60 is arranged in front of the front wall 52 . The front cover 60 is arranged in front of the first platen 15A. When the front cover 60 closes the first opening 58A, the lower end 60B of the front cover 60 is positioned forward of the second platen 15B. Note that "the front cover 60 closes the first opening 58A" includes the case where the front cover 60 closes at least a portion of the first opening 58A and the case where the entire first opening 58A is closed.

As shown in FIG. 1, the printer 10 emits light emitted from the ultraviolet irradiation devices 26A and 26B (see FIG. 2) to the outside from between the front cover 60 and the platen 15 (that is, part of the first opening 58A). A downstream side leakage light suppression cover 70 having a plate member 71 for suppressing leakage is provided. In addition, the downstream side leakage light suppression cover 70 (more specifically, the plate-like member 71) reduces the leakage of light to the outside by, for example, 5% or less ( preferably 0%). The downstream side leakage light suppression cover 70 is an example of a leakage light suppression cover. The plate member 71 is an example of a shielding portion. As will be described later, the downstream side leakage light suppression cover 70 is configured such that the angle with respect to the front cover 60 can be changed according to the thickness of the recording medium 5 placed on the platen 15 . The downstream side leakage light suppression cover 70 is attached to the base member 40 . The downstream side leakage light suppression cover 70 is detachably attached to the second left side frame 42L (see FIGS. 1 and 3) and the second right side frame 42R (see FIG. 6) of the base member 40. As shown in FIG.

As shown in FIG. 2, the downstream side leakage light suppression cover 70 is provided on a plate member 71 extending in the main scanning direction Y, and on a right end 71R (see FIG. 2) and a left end 71L (see FIG. 2) of the plate member 71, respectively. and a supporting shaft 72 (see FIG. 7) provided. Note that the support shafts 72 provided at the right end 71R and the left end 71L of the plate member 71 are bilaterally symmetrical in a plan view with respect to a straight line extending in the sub-scanning direction X. The provided support shaft 72 will be described. As shown in FIG. 7, the support shaft 72 extends in the main scanning direction Y. As shown in FIG. The support shaft 72 includes a first portion 72A connected to the plate-like member 71, a second portion 72B connected to the first portion 72A and having a larger shaft diameter than the first portion 72A, and a plate-like member. and a third portion 72C fixed to 71; Here, the first portion 72A is indirectly connected to the plate member 71 via the third portion 72C. The first portion 72A is a portion that is inserted into a groove 43 (see FIG. 8) formed in the second right side frame 42R. The second portion 72B is a portion that contacts a pressing plate 78 of a first detection sensor 75 (see FIG. 8), which will be described later.

As shown in FIGS. 1, 2 and 3, the downstream side leakage light suppression cover 70 is set when the thickness of the recording medium 5 placed on the platen 15 is equal to or less than a predetermined thickness (that is, when printing is performed on the recording medium 5A). case), it is attached to the base member 40 at a first angle with respect to the front cover 60 . Here, the downstream side leakage light suppression cover 70 is substantially parallel to the front cover 60 . As shown in FIG. 3 , the plate-like member 71 of the downstream side leakage light suppression cover 70 extends vertically at least below the lower end 60B of the front cover 60 . The plate-like member 71 of the downstream side leakage light suppression cover 70 is arranged so as to be inclined downward from the rear to the front (that is, inclined obliquely downward). The upper end 70T of the plate-like member 71 of the downstream side leakage light suppression cover 70 is located above and behind the lower end 60B of the front cover 60 . A top end 70T of the plate member 71 is positioned above the platen 15 . A lower end 70B of the plate-like member 71 of the downstream side leakage light suppression cover 70 is positioned below the lower end 15X of the platen 15 . The downstream side leakage light suppression cover 70 is positioned forward of the platen 15 . As shown in FIG. 2, the plate-like member 71 of the downstream side leakage light suppression cover 70 is arranged so as to overlap the platen 15 in front view (that is, when viewed from the downstream side in the sub-scanning direction X).

As shown in FIGS. 13, 14 and 15, the downstream side leakage light suppression cover 70 is set when the thickness of the recording medium 5 placed on the platen 15 is thicker than a predetermined thickness (that is, when printing is performed on the recording medium 5B). case), it is attached to the base member 40 at a second angle with respect to the front cover 60 . Here, the angle of the downstream side leakage light suppression cover 70 with respect to the front cover 60 is α (see FIG. 15). As shown in FIG. 15 , the plate-like member 71 of the downstream side leakage light suppression cover 70 is arranged to extend downstream in the sub-scanning direction X below the lower end 60B of the front cover 60 . The plate member 71 of the downstream side leakage light suppression cover 70 is arranged above at least part of the platen 15 (here, the second platen 15B). The plate member 71 of the downstream side leakage light suppression cover 70 is arranged so as to extend in the horizontal direction. A front end 70</b>F of the plate member 71 of the downstream side leakage light suppression cover 70 (that is, the downstream side end in the sub-scanning direction X) is positioned forward of the front cover 60 . A front end 70F of the plate-like member 71 is located forward of a front end 42LF of the second left side frame 42L. The downstream side leakage light suppression cover 70 is positioned forward of the first platen 15A. A rear end 70</b>R of the plate-like member 71 of the downstream side leakage light suppression cover 70 (that is, an upstream end in the sub-scanning direction X) is positioned behind the lower end 60</b>B of the front cover 60 . As shown in FIG. 14, the plate member 71 of the downstream side leakage light suppression cover 70 is arranged so as to overlap a portion of the platen 15 (here, a portion of the second platen 15B) in front view.

As shown in FIG. 8, the printer 10 includes a first detection sensor 75 that detects whether or not the downstream side leakage light suppression cover 70 is attached. The first detection sensor 75 is an example of a detection sensor. The first detection sensor 75 detects that the downstream side leakage light suppression cover 70 is attached when the support shaft 72 contacts the first detection sensor 75 . The first detection sensor 75 is provided on the second right side frame 42R. The first detection sensor 75 is provided on the surface of the second right side frame 42</b>R in the main scanning direction Y opposite to the surface that contacts and separates from the platen 15 . Here, the first detection sensor 75 is provided on the right surface of the second right side frame 42R. The first detection sensor 75 includes a box-shaped body portion 76, a switch 77 that is provided in the body portion 76 and turns on when pressed to detect that the downstream side leakage light suppression cover 70 is attached, A pressing plate 78 is provided on the body portion 76 so as to be vertically movable and presses the switch 77 by being pressed from above by the second portion 72B of the support shaft 72 . The pressing plate 78 is an elastically deformable thin plate member.

As shown in FIG. 8, a groove 43 is formed in the upper end 42T of the second right side frame 42R. The groove 43 is sized to allow the first portion 72A of the support shaft 72 to pass therethrough. The second right side frame 42R supports the first portion 72A of the support shaft 72 in the groove 43. As shown in FIG. The groove 43 partially overlaps the first detection sensor 75 when the support shaft 72 is not in contact with the first detection sensor 75 when viewed from the side (that is, viewed from the main scanning direction Y). In the present embodiment, the groove 43 overlaps the pressing plate 78 of the first detection sensor 75 when the second portion 72B of the support shaft 72 is not in contact with the pressing plate 78 of the first detection sensor 75 when viewed from the side. As shown in FIG. 9, the second portion 72B of the support shaft 72 is formed to be larger than the groove 43 in side view. That is, the groove 43 is formed in a size that the second portion 72B of the support shaft 72 cannot pass through. Therefore, when the downstream side leakage light suppression cover 70 is attached to the second right side frame 42R, the support shaft 72 cannot pass through the groove 43 from the side thereof, as indicated by the arrow A1 in FIG. Therefore, as indicated by an arrow A2 in FIG. 11, by fitting the support shaft 72 into the groove 43 from above, the downstream side leakage light suppressing cover 70 can be attached to the second right side frame 42R.

As shown in FIGS. 3 and 6, the printer 10 includes a support member 65 that supports the downstream side leakage light suppression cover 70. As shown in FIGS. As shown in FIG. 3, the support member 65 is provided on the second left side frame 42L. As shown in FIG. 6, the support member 65 is provided on the second right side frame 42R. Note that the support members 65 provided on the second left side frame 42L and the second right side frame 42R are bilaterally symmetrical in a plan view with respect to a straight line extending in the sub-scanning direction X, so the second right side frame will be described below. The support member 65 provided on 42R will be described. As shown in FIG. 12, the support member 65 includes a fixed wall 65A attached to the second right side frame 42R and a second support member extending leftward from the front end of the fixed wall 65A and supporting the downstream side leakage light suppression cover 70. A wall 65B and a second support wall 65C that extends leftward from the upper end of the fixed wall 65A and supports the downstream side leakage light suppression cover 70. The first support wall 65B is inclined downward from the rear to the front (that is, inclined obliquely downward). The second support wall 65C extends horizontally. As shown in FIG. 6, the first support wall 65B prevents downstream leakage when the thickness of the recording medium 5 placed on the platen 15 is equal to or less than a predetermined thickness (that is, when printing is performed on the recording medium 5A). Supports the light suppression cover 70 . At this time, the second support wall 65</b>C does not support the downstream side leakage light suppression cover 70 . Here, FIG. 7 is a plan view showing a state in which the downstream side leakage light suppression cover 70 is attached to the second right side frame 42R when the thickness of the recording medium 5 placed on the platen 15 is equal to or less than a predetermined thickness. It is a diagram. FIG. 9 is a side view showing a state where the downstream side leakage light suppression cover 70 is attached to the second right side frame 42R when the thickness of the recording medium 5 placed on the platen 15 is equal to or less than a predetermined thickness. is. Further, as shown in FIG. 16, the second support wall 65C prevents downstream leakage when the thickness of the recording medium 5 placed on the platen 15 is thicker than a predetermined thickness (that is, when printing is performed on the recording medium 5B). Supports the light suppression cover 70 . At this time, the first support wall 65</b>B does not support the downstream side leakage light suppression cover 70 . In this embodiment, the second support wall 65C indirectly supports the downstream side leakage light suppression cover 70 via the guide table 45, as will be described later. The second support wall 65C supports the guide table 45. As shown in FIG. Here, FIG. 17 is a plan view showing a state where the downstream side leakage light suppressing cover 70 is attached to the second right side frame 42R when the thickness of the recording medium 5 placed on the platen 15 is thicker than a predetermined thickness. It is a diagram. FIG. 18 is a side view showing a state where the downstream side leakage light suppressing cover 70 is attached to the second right side frame 42R when the thickness of the recording medium 5 placed on the platen 15 is thicker than the predetermined thickness. is.

As shown in FIG. 16, the printer 10 has a guide table 45 that guides the movement of the recording medium 5B. That is, the guide table 45 is used when the thickness of the recording medium 5 placed on the platen 15 is thicker than a predetermined thickness (that is, when printing on the recording medium 5B). The guide table 45 is detachably attached to the base member 40 . The guide table 45 is attached to the second left side frame 42L and the second right side frame 42R. As shown in FIG. 15, the guide table 45 is arranged below the first platen 15A and above part of the second platen 15B. The guide table 45 is arranged below the downstream side leakage light suppression cover 70 . A front end 45</b>F of the guide table 45 is located behind a front end 70</b>F of the downstream side leakage light suppression cover 70 . A rear end 45</b>R of the guide table 45 is located behind a rear end 70</b>R of the downstream side leakage light suppression cover 70 .

As shown in FIG. 19, the guide table 45 is provided with a mounting plate 46 on which the recording medium 5B is placed, and the left and right ends of the mounting plate 46. The mounting plate 46 is mounted on the second left side frame 42L. and a cover support wall 47 that supports and supports the downstream side leakage light suppression cover 70 from below. The mounting plate 46 extends in the main scanning direction Y and the sub scanning direction X. As shown in FIG. The length of the mounting plate 46 in the main scanning direction Y is the same as the length of the platen 15 in the main scanning direction Y. As shown in FIG. Note that the cover support wall 47 supported by the second left side frame 42L and the second right side frame 42R is bilaterally symmetrical in a plan view with respect to a straight line extending in the sub-scanning direction X. The cover support wall 47 provided at 42L will be described. The cover support wall 47 includes a fixed wall 47A arranged to face the second left side frame 42L when the guide table 45 is attached, and a second wall extending rightward from the lower end of the fixed wall 47A and connected to the mounting plate 46. 1 side wall 47B, and a second wall 47C that extends rightward from the upper end of the fixed wall 47A and supports the downstream side leakage light suppression cover 70. As shown in FIG.

As shown in FIG. 4, the printer 10 has an upstream leakage light suppression function that suppresses the light emitted from the ultraviolet irradiation devices 26A and 26B (see FIG. 2) from leaking to the outside from the second opening 58B (see FIG. 3). A cover 80 is provided. Note that the upstream side leakage light suppressing cover 80 (more specifically, a plate member 82 and a plate member 87, which will be described later) suppresses the light leaked to the outside from the light emitted from the ultraviolet irradiation devices 26A and 26B (see FIG. 2). For example, it is suppressed to 5% or less (preferably 0%). The upstream side leakage light suppression cover 80 includes a first leakage light suppression cover 81 and a second leakage light suppression cover 86 (see FIG. 24). As will be described later, the first leakage light suppression cover 81 and the second leakage light suppression cover 86 are attached differently depending on the thickness of the recording medium 5 placed on the platen 15 .

As shown in FIG. 4, the first leakage light suppression cover 81 is positioned at the closed position CP where it overlaps the second opening 58B (see also FIG. 3) in a rear view (that is, when viewed from the upstream side in the sub-scanning direction X). and an open position OP (see FIG. 15) that does not overlap the second opening 58B. attached to the As shown in FIG. 3 , the first leakage light suppression cover 81 is positioned behind the platen 15 . The first leakage light suppression cover 81 is provided when the thickness of the recording medium 5 placed on the platen 15 is equal to or less than a predetermined thickness (that is, when printing is performed on the recording medium 5A), and when the recording medium 5 placed on the platen 15 It is attached to the second left side frame 42L and the second right side frame 42R in any case where the thickness of the medium 5 is thicker than a predetermined thickness (that is, when printing is performed on the recording medium 5B). The first leakage light suppression cover 81 is positioned at the closed position CP when printing on the recording medium 5A, and is positioned at the open position OP when printing on the recording medium 5B. Since a magnet (not shown) is provided on the rear wall 56 of the main body case 50, when the first leakage light suppression cover 81 is rotated upward, the first leakage light suppression cover 81 is positioned at the open position OP. is held, and when the first leaked light suppression cover 81 is rotated downward against the magnetic force, the first leaked light suppression cover 81 returns to the closed position CP.

As shown in FIG. 3, the first leakage light suppression cover 81 includes a plate member 82 extending in the main scanning direction Y, a left end and a right end of the plate member 82, and a second left side frame 42L and a second right side frame. A support shaft 83 rotatably attached to 42R and a pressing plate 84 that contacts the second detection sensor 95 are provided. The plate member 82 is a member that prevents the light emitted from the ultraviolet irradiation devices 26A and 26B from leaking from the main body case 50 to the outside (rear side), and is formed by bending a sheet metal. When the first leakage light suppression cover 81 is positioned at the closed position CP, the plate member 82 has a first portion 82A extending in the main scanning direction Y and the vertical direction and a second portion extending forward from the upper end of the first portion 82A. 82B, a third portion 82C extending forward from the lower end of the first portion 82A, and a fourth portion 82D extending upward from the front of the third portion 82C. As shown in FIG. 20, the support shaft 83 extends in the main scanning direction Y. As shown in FIG. The support shaft 83 is provided on the second portion 82B of the plate member 82 . The pressing plate 84 includes a fixed wall 84A that is fixed to the first portion 82A of the plate member 82, a fixed wall 84A that protrudes in a direction away from the fixed wall 84A (protrudes rearward in the example shown in FIG. 20), and a second detection sensor. and a pressing wall 84B capable of pressing a pressing plate 98 of 95. As shown in FIG. 23, the pressing wall 84B presses the pressing plate 98 of the second detection sensor 95 to close the switch 97 of the second detection sensor 95 when the first leakage light suppression cover 81 is positioned at the closed position CP. is configured to press the

As shown in FIG. 15, the second leaked light suppression cover 86 is arranged on the second left side frame 42L and the second right side frame 42R (see FIG. 16) so as to overlap at least a portion of the second opening 58B in rear view. is detachably provided in the As shown in FIG. 15, the second leakage light suppressing cover 86 is located behind the first platen 15A. A rear end 86R of the second leakage light suppression cover 86 is positioned rearward of the body case 50 (here, the rear wall 56). A rear end 86</b>R of the second leakage light suppressing cover 86 is located behind the platen 15 . When the thickness of the recording medium 5 placed on the platen 15 is equal to or less than a predetermined thickness (that is, when printing is performed on the recording medium 5A), the second left side frame 42L and the second leakage light suppression cover 86 are provided. 2 When the thickness of the recording medium 5 removed from the right side frame 42R and placed on the platen 15 is thicker than a predetermined thickness (that is, when printing on the recording medium 5B), the second left side frame 42L and the second 2 is attached to the right side frame 42R.

As shown in FIG. 15 , the second leakage light suppression cover 86 includes a plate member 87 extending in the main scanning direction Y and a pressing plate 88 that contacts the second detection sensor 95 . When the second leaked light suppression cover 86 is attached to the second left side frame 42L and the second right side frame 42R, the plate member 87 has a first portion 87A extending in the main scanning direction Y and the sub-scanning direction X and , a second portion 87B extending forward and obliquely downward from the front end of the first portion 87A, a third portion 87C extending downward from the rear end of the first portion 87A, and a left and right end of the first portion 87A extending upward. and a fourth portion 87D fixed to the second left side frame 42L and the second right side frame 42R. The first portion 87A has a mounting surface 87AA (see FIG. 25) on which the recording medium 5B is mounted. The placement surface 87AA extends in the main scanning direction Y and the sub scanning direction X. As shown in FIG. As shown in FIG. 26, the pressing plate 88 includes a fixed wall 88A fixed to the first portion 87A of the plate member 87 and a vertical wall projecting in a direction away from the fixed wall 88A (downward in the example shown in FIG. 26). It has a wall 88B and a pressing wall 88C that protrudes in a direction away from the vertical wall 88B (forward in the example shown in FIG. 26) and can press the pressing plate 98 (see FIG. 20) of the second detection sensor 95. The pressing wall 88C presses the pressing plate 98 of the second detection sensor 95 to perform the second detection when the second leakage light suppression cover 86 is attached to the second left side frame 42L and the second right side frame 42R. It is configured to press the switch 97 of the sensor 95 .

As shown in FIG. 21, the printer 10 includes a second detection sensor 95 that detects whether or not the upstream leak light suppression cover 80 is attached. In this embodiment, the second detection sensor 95 has the same configuration as the first detection sensor 75 . The second detection sensor 95 is detected when the pressing wall 84B of the pressing plate 84 of the first leakage light suppression cover 81 contacts the second detection sensor 95 and when the pressing wall 88C of the pressing plate 88 of the second leakage light suppression cover 86 comes into contact with the second detection sensor 95. (see FIG. 26) contacts the second detection sensor 95, it detects that the upstream side leakage light suppression cover 80 is attached. The second detection sensor 95 is provided on the second left side frame 42L. The second detection sensor 95 is provided on the platen 15 side surface of the main scanning direction Y surface of the second left side frame 42L. Here, the second detection sensor 95 is provided on the right surface of the second left side frame 42L. The second detection sensor 95 includes a box-shaped main body portion 96, a switch 97 that is provided in the main body portion 96 and turns on when pressed to detect that the upstream side leakage light suppression cover 80 is attached, The pressing wall 84B of the pressing plate 84 of the first leakage light suppression cover 81 or the pressing wall of the pressing plate 88 of the second leakage light suppression cover 86 is provided on the main body 96 so as to be movable in the front-rear direction (that is, the sub-scanning direction X). and a pressing plate 98 that presses the switch 97 by being pressed from behind by 88C. The pressing plate 98 is an elastically deformable thin plate member. 21, illustration of a cover member 99, which will be described later, is omitted.

When the thickness of the recording medium 5 placed on the platen 15 is equal to or less than a predetermined thickness (that is, when printing is performed on the recording medium 5A), the second detection sensor 95 detects that the first leakage light suppression cover 81 is in the closed position. It is configured to detect that the upstream side leakage light suppression cover 80 is attached when positioned at CP (see FIG. 22). Further, the second detection sensor 95 detects that when the recording medium 5 placed on the platen 15 is thicker than a predetermined thickness (that is, when printing is performed on the recording medium 5B), the first leakage light suppression cover 81 is It is determined that the upstream side leakage light suppression cover 80 is attached when the second leakage light suppression cover 86 is attached to the second left side frame 42L and the second right side frame 42R at the open position OP. configured to detect

As shown in FIG. 20 , a cover member 99 is arranged around the second detection sensor 95 to cover the second detection sensor 95 . The cover member 99 is attached to the second left side frame 42L. The cover member 99 is in contact with the fixed wall 84A of the pressing plate 84 of the first leakage light suppression cover 81 and the vertical wall 88B (see FIG. 26) of the pressing plate 88 of the second leakage light suppression cover 86, and the pressing plate 84 is fixed. The pressing wall 84B and the pressing wall 88C of the pressing plate 88 are members that prevent the pressing plate 98 of the second detection sensor 95 from being excessively pressed. The cover member 99 is formed with an opening 99A. The opening 99A overlaps the pressing plate 98 of the second detection sensor 95 when viewed from the rear.

As shown in FIG. 3, the printer 10 includes a support plate 90 that supports the second leakage light suppression cover 86. As shown in FIG. The support plate 90 is attached to each of the second left side frame 42L and the second right side frame 42R (see FIG. 6). Since the support plate 90 attached to the second left side frame 42L and the second right side frame 42R is symmetrical in plan view with respect to a straight line extending in the sub-scanning direction X, the second left side frame will be described below. The support plate 90 provided on 42L will be described. The support plate 90 extends in the sub-scanning direction X, as shown in FIGS. The support plate 90 includes a fixed wall 90A fixed to the second left side frame 42L and a support wall 90B extending in a direction away from the fixed wall 90A (to the right in this case) and supporting the second leakage light suppression cover 86 from below. and The support plate 90 is arranged above the second detection sensor 95 .

The control device 100 is a device that controls printing of an image on the recording medium 5 . The configuration of the control device 100 is not particularly limited. The control device 100 is, for example, a microcomputer. The hardware configuration of the microcomputer is not particularly limited. central processing unit), ROM (read only memory) that stores programs executed by the CPU, RAM (random access memory) that is used as a working area for developing programs, and memory that stores programs and various data a storage device; As shown in FIG. 1 , the control device 100 is provided inside the body case 50 .

The control device 100 controls the rotation of the grit roller 36 by controlling the drive of a feed motor (not shown). Thereby, the movement of the recording medium 5 placed on the platen 15 in the sub-scanning direction X is controlled. The control device 100 moves the carriage 22 in the main scanning direction Y by controlling the driving of the carriage motor 34 . That is, the ink head 24 and the ultraviolet irradiation devices 26A and 26B are moved in the main scanning direction Y. As shown in FIG. The control device 100 controls the timing of ejecting ink from the first nozzles 24A and the second nozzles 24B of the ink head 24, the amount of ink ejected, and the like. The control device 100 controls the timing and amount of light for irradiating the photocurable ink ejected onto the recording medium 5 from the ultraviolet irradiation devices 26A and 26B.

In the controller 100, the first detection sensor 75 detects that the downstream side leakage light suppression cover 70 is attached, and the second detection sensor 95 detects that the upstream side leakage light suppression cover 80 is attached. In this case, the ink head 24 ejects the photocurable ink onto the recording medium 5 and the ultraviolet irradiation devices 26A and 26B emit light. That is, in the printer 10 of the present embodiment, when both the downstream side leakage light suppression cover 70 and the upstream side leakage light suppression cover 80 are securely attached to the second left side frame 42L and the second right side frame 42R. It is configured so that it can print on the recording medium 5 only in Further, when at least one of the downstream side leakage light suppression cover 70 and the upstream side leakage light suppression cover 80 is removed from the second left side frame 42L and the second right side frame 42R, the control device 100 removes the ink head 24 from the ink head 24. It is configured to stop discharging the photocurable ink onto the recording medium 5 and irradiating light from the ultraviolet irradiation devices 26A and 26B.

As described above, in the printer 10 , the downstream side leakage light suppression cover 70 is configured so that the angle with respect to the front cover 60 can be changed according to the thickness of the recording medium 5 placed on the platen 15 . As a result, for example, when the thickness of the recording medium 5 is relatively thin (for example, when printing on the recording medium 5A) and when it is relatively thick (for example, when printing on the recording medium 5B), the ultraviolet irradiation device 26A , 26B to the outside from between the front cover 60 and the platen 15, the angle of the downstream side leakage light suppression cover 70 with respect to the front cover 60 can be appropriately set. can.

According to the printer 10 of the present embodiment, the plate member 71 of the downstream side leakage light suppression cover 70 is arranged when the thickness of the recording medium 5 placed on the platen 15 is equal to or less than a predetermined thickness (for example, when printing on the recording medium 5A). ), it extends in the vertical direction at least below the lower end 60B of the front cover 60 and is arranged so as to overlap the platen 15 when viewed from the rear. For example, the plate-like member 71 of the downstream side leakage light suppression cover 70 is arranged so as to be inclined downward from the rear to the front. As a result, forward leakage of light emitted from the ultraviolet irradiation devices 26A and 26B below the lower end 60B of the front cover 60 is further suppressed by the plate member 71 of the downstream side leakage light suppression cover 70 . Further, when the thickness of the recording medium 5 placed on the platen 15 is thicker than a predetermined thickness (for example, when printing on the recording medium 5B), the plate-like member 71 of the downstream side leakage light suppressing cover 70 is arranged at the front side. It extends downstream in the sub-scanning direction X from the lower end 60B of the cover 60 and is arranged above the second platen 15B. For example, the plate member 71 of the downstream side leakage light suppression cover 70 is arranged so as to extend in the horizontal direction. As a result, forward and upward leakage of the light emitted from the ultraviolet irradiation devices 26A and 26B in front of the lower end 60B of the front cover 60 is further suppressed by the plate member 71 of the downstream side leakage light suppression cover 70. .

According to the printer 10 of the present embodiment, when the support shaft 72 of the downstream side leakage light suppression cover 70 contacts the first detection sensor 75, the first detection sensor 75 detects that the downstream side leakage light suppression cover 70 is attached. detect that That is, regardless of the angle of the downstream side leakage light suppression cover 70 with respect to the front cover 60, when the support shaft 72 contacts the first detection sensor 75, the first detection sensor 75 detects that the downstream side leakage light suppression cover 70 is attached. can be detected.

According to the printer 10 of the present embodiment, the upper ends 42T of the second left side frame 42L and the second right side frame 42R support the first portion 72A of the support shaft 72, and the first detection sensor 75 is positioned in a side view. A groove 43 that partially overlaps is formed, and the second portion 72B of the support shaft 72 is larger than the groove 43 when viewed from the side. As a result, when the support shaft 72 is supported by the second left side frame 42L and the second right side frame 42R, the support shaft 72 cannot be inserted from the side of the groove 43 in the main scanning direction Y. is inserted from above the groove 43 . That is, by physically preventing the support shaft 72 from being inserted from the side of the groove 43, the first detection sensor 75 is prevented from being pushed by the support shaft 72 from the side and malfunctioning.

According to the printer 10 of the present embodiment, the first detection sensor 75 is provided on the body portion 76 so as to be movable in the vertical direction, and presses the switch 77 by being pressed by the second portion 72B of the support shaft 72 from above. A pressing plate 78 is provided. The pressing plate 78 overlaps the groove 43 when viewed from the side. This prevents the pressing plate 78 of the first detection sensor 75 from being pressed from the side in the main scanning direction Y by the support shaft 72 and malfunctioning.

According to the printer 10 of this embodiment, when the thickness of the recording medium 5 placed on the platen 15 is equal to or less than a predetermined thickness (for example, when printing is performed on the recording medium 5A), the downstream side leakage light suppression cover 70 is disposed forward of the platen 15 , and the upper end 70T of the plate-shaped member 71 of the downstream side leakage light suppression cover 70 is positioned above and behind the lower end 60B of the front cover 60 . This more reliably suppresses the light emitted from the ultraviolet irradiation devices 26A and 26B from leaking from between the front cover 60 and the platen 15 .

According to the printer 10 of the present embodiment, when the thickness of the recording medium 5 placed on the platen 15 is thicker than a predetermined thickness (for example, when printing on the recording medium 5B), the downstream side leakage light suppression cover 70 is arranged above at least a portion of the platen 15, and the rear end 70R of the plate-shaped member 71 of the downstream side leakage light suppression cover 70 is positioned behind the lower end 60B of the front cover 60. do. This more reliably suppresses the light emitted from the ultraviolet irradiation devices 26A and 26B from leaking from between the front cover 60 and the platen 15 .

The printer 10 of this embodiment includes a guide table 45 that is used when the thickness of the recording medium 5 placed on the platen 15 is thicker than a predetermined thickness (for example, when printing on the recording medium 5B). The guide table 45 is arranged below the first platen 15A and above a portion of the second platen 15B and below the plate member 71 of the downstream side leakage light suppression cover 70, and is transported from the first platen 15A. It guides the movement of the recording medium 5B. This prevents the relatively thick recording medium 5B from bending.

According to the printer 10 of the present embodiment, the support member 65 supports the downstream side leakage light suppression cover 70 when the thickness of the recording medium 5 is equal to or less than a predetermined thickness (for example, when printing is performed on the recording medium 5A). 1 support wall 65B, a second support wall 65C that supports the guide table 45 when the thickness of the recording medium 5 placed on the platen 15 is thicker than a predetermined thickness (for example, when printing on the recording medium 5B), have. The guide table 45 supports the downstream leakage light suppression cover 70 . By using the support member 65 in this manner, the angle of the downstream side leakage light suppression cover 70 with respect to the front cover 60 can be easily changed.

According to the printer 10 of this embodiment, the second support wall 65C is configured to support the guide table 45, and the guide table 45 supports the cover support wall 47 that supports the downstream side leakage light suppression cover 70 from below. I have. Thus, by using the support member 65 and the guide table 45, the angle of the downstream side leakage light suppression cover 70 with respect to the front cover 45 can be changed to a predetermined angle.

According to the printer 10 of the present embodiment, the front end 70</b>F of the downstream side leakage light suppression cover 70 is located forward of the front end 45</b>F of the guide table 45 . This suppresses upward leakage of the light emitted from the ultraviolet irradiation devices 26A and 26B from between the downstream side leakage light suppression cover 70 and the guide table 45 .

The preferred embodiments of the present invention have been described above. However, the above-described embodiments are merely examples, and the present invention can be implemented in various other forms.

Although the front cover 60 is rotatably provided on the first left side frame 41L and the first right side frame 41R in the above-described embodiment, it may be rotatably provided on the main body case 50 . Further, the downstream side leakage light suppression cover 70 and the upstream side leakage light suppression cover 80 are detachably provided on the second left side frame 42L and the second right side frame 42R, but are detachably provided on the main body case 50. may have been

Although the first detection sensor 75 is provided on the second right side frame 42R in the above-described embodiment, it may be provided on the second left side frame 42L. Further, the second detection sensor 95 is provided on the second left side frame 42L, but may be provided on the second right side frame 42R.

In the above-described embodiment, the first portion 72A is indirectly connected to the plate member 71 via the third portion 72C, but the first portion 72A is directly connected to the plate member 71. good too.

In the embodiment described above, the downstream side leakage light suppression cover 70 is configured to be attached at two different angles with respect to the front cover 60, but is configured to be attached at three or more different angles. may Further, when the thickness of the recording medium 5 is relatively thin, the downstream side leakage light suppressing cover 70 is arranged so as to be inclined downward toward the downstream side in the sub-scanning direction X, but it is not arranged in an inclined state. may For example, if the front cover 60 extends vertically rather than in an inclined state (extends in a direction orthogonal to the platen 15A), the front cover 60 extends vertically in correspondence with the extending direction of the front cover 60. may be placed in When the thickness of the recording medium 5 is thicker than a predetermined thickness, the recording medium 5 is arranged to extend horizontally toward the downstream side in the sub-scanning direction X. However, when the length of the front cover 60 in the vertical direction is changed, For example, the position of the upstream end of the downstream side leakage light suppression cover 70 in the sub-scanning direction X is changed. In this case, the downstream side leakage light suppression cover 70 may be inclined downward or upward in correspondence with the position of the upstream end of the downstream side leakage light suppression cover 70 in the sub-scanning direction X. good.

10 Printer (inkjet printer)
15 Platen 22 Carriage 24 Ink heads 26A, 26B Ultraviolet irradiation device 40 Base member 50 Body case 58A First opening (opening)
60 front cover 70 downstream side leakage light suppression cover (leakage light suppression cover)
71 plate member (shielding part)
75 first detection sensor (detection sensor)
100 control device

Claims (14)

a base member;
a platen provided on the base member and on which a recording medium is mounted;
a carriage provided on the base member, positioned above the platen, and movable in a main scanning direction;
an ink head that is mounted on the carriage and ejects photocurable ink onto the recording medium that is conveyed in a sub-scanning direction perpendicular to the main scanning direction;
a light irradiation device that is mounted on the carriage and that irradiates light toward the photocurable ink ejected onto the recording medium;
a body case having an opening formed between the platen and downstream of the carriage in the sub-scanning direction, and attached to the base member;
a front cover attached to the base member or the main body case for opening and closing the opening;
A leakage light suppression cover having a shielding portion that suppresses leakage of light emitted from the light irradiation device to the outside from between the front cover and the platen, and is attached to the base member or the main body case. and a leakage light suppression cover,
The ink jet printer according to claim 1, wherein the leakage light suppression cover is configured to change an angle with respect to the front cover so as not to come into contact with the recording medium according to the thickness of the recording medium placed on the platen. a base member;
a platen provided on the base member and on which a recording medium is mounted;
a carriage provided on the base member, positioned above the platen, and movable in a main scanning direction;
an ink head that is mounted on the carriage and ejects photocurable ink onto the recording medium that is conveyed in a sub-scanning direction perpendicular to the main scanning direction;
a light irradiation device that is mounted on the carriage and that irradiates light toward the photocurable ink ejected onto the recording medium;
a body case having an opening formed between the platen and downstream of the carriage in the sub-scanning direction, and attached to the base member;
a front cover attached to the base member or the main body case for opening and closing the opening;
A leakage light suppression cover having a shielding portion that suppresses leakage of light emitted from the light irradiation device to the outside from between the front cover and the platen, and is attached to the base member or the main body case. and a leakage light suppression cover,
The leakage light suppression cover is configured to be rotatable with respect to the platen, and is configured to be able to select between a horizontal state and an inclined state according to the thickness of the recording medium placed on the platen. I have an inkjet printer. a base member;
a platen provided on the base member and on which a recording medium is mounted;
a carriage provided on the base member, positioned above the platen, and movable in a main scanning direction;
an ink head that is mounted on the carriage and ejects photocurable ink onto the recording medium that is conveyed in a sub-scanning direction perpendicular to the main scanning direction;
a light irradiation device that is mounted on the carriage and that irradiates light toward the photocurable ink ejected onto the recording medium;
a body case having an opening formed between the platen and downstream of the carriage in the sub-scanning direction, and attached to the base member;
a front cover attached to the base member or the main body case for opening and closing the opening;
A leakage light suppression cover having a shielding portion that suppresses leakage of light emitted from the light irradiation device to the outside from between the front cover and the platen, and is attached to the base member or the main body case. and a leakage light suppression cover,
The leaked light suppression cover is configured such that the angle with respect to the front cover can be changed according to the thickness of the recording medium placed on the platen, and the recording medium is prevented from passing through the leaked light suppression cover. An inkjet printer mounted on the base member or the body case while maintaining a constant angle with respect to the front cover until after passing through. The shielding portion is formed in a plate shape extending in the main scanning direction,
When the thickness of the recording medium placed on the platen is equal to or less than a predetermined thickness, the shielding portion extends in the vertical direction at least below the lower end of the front cover and is viewed from the downstream side in the sub-scanning direction. arranged so as to overlap with the platen when
When the thickness of the recording medium placed on the platen is greater than the predetermined thickness, the shielding portion extends downstream in the sub-scanning direction below the lower end of the front cover and above the platen. 4. An inkjet printer according to any one of claims 1 to 3, arranged in a . The shielding part is
when the thickness of the recording medium placed on the platen is equal to or less than the predetermined thickness, the shielding portion is arranged to be inclined downward from the upstream side toward the downstream side in the sub-scanning direction; ,
5. The inkjet printer according to claim 4, wherein when the thickness of the recording medium placed on the platen is thicker than the predetermined thickness, the shielding portion is arranged to extend in the horizontal direction. a detection sensor provided on the base member for detecting whether or not the leakage light suppression cover is attached;
The leakage light suppression cover is provided at an end of the shielding portion in the main scanning direction and has a support shaft extending in the main scanning direction,
The inkjet printer according to any one of claims 1 to 5, wherein the detection sensor detects that the leakage light suppression cover is attached when the support shaft contacts the detection sensor. the base member has a vertical wall provided at one end of the platen in the main scanning direction, extending in the vertical direction, and provided with the detection sensor;
The support shaft has a first portion connected to the shielding portion, and a second portion connected to the first portion and having a shaft diameter larger than that of the first portion,
A groove that supports the first portion of the support shaft and overlaps a part of the detection sensor when the support shaft is not in contact with the detection sensor when the support shaft is not in contact with the detection sensor. is formed and
7. An inkjet printer according to claim 6, wherein said second portion of said support shaft is larger than said groove when viewed from said main scanning direction. The detection sensor is
a main body;
a switch that is provided on the main body and turns on when pressed to detect that the leakage light suppression cover is attached;
a pressing plate that is provided on the main body so as to be vertically movable and presses the switch by being pressed from above by the second portion of the support shaft;
8. The inkjet printer according to claim 7, wherein said pressing plate overlaps said groove when viewed from said main scanning direction when said second portion of said support shaft is not in contact with said pressing plate. a base member;
a platen provided on the base member and on which a recording medium is mounted;
a carriage provided on the base member, positioned above the platen, and movable in a main scanning direction;
an ink head that is mounted on the carriage and ejects photocurable ink onto the recording medium that is conveyed in a sub-scanning direction perpendicular to the main scanning direction;
a light irradiation device that is mounted on the carriage and that irradiates light toward the photocurable ink ejected onto the recording medium;
a body case having an opening formed between the platen and downstream of the carriage in the sub-scanning direction, and attached to the base member;
a front cover attached to the base member or the main body case for opening and closing the opening;
A leakage light suppression cover having a shielding portion that suppresses leakage of light emitted from the light irradiation device to the outside from between the front cover and the platen, and is attached to the base member or the main body case. and a leakage light suppression cover,
The leakage light suppression cover is configured to change an angle with respect to the front cover according to the thickness of the recording medium placed on the platen,
The shielding portion is formed in a plate shape extending in the main scanning direction,
When the thickness of the recording medium placed on the platen is equal to or less than a predetermined thickness, the shielding section is arranged downstream of the platen in the sub-scanning direction, and the upper end of the shielding section is An inkjet printer located above a lower end of the front cover and upstream in the sub-scanning direction. a base member;
a platen provided on the base member and on which a recording medium is mounted;
a carriage provided on the base member, positioned above the platen, and movable in a main scanning direction;
an ink head that is mounted on the carriage and ejects photocurable ink onto the recording medium that is conveyed in a sub-scanning direction perpendicular to the main scanning direction;
a light irradiation device that is mounted on the carriage and that irradiates light toward the photocurable ink ejected onto the recording medium;
a body case having an opening formed between the platen and downstream of the carriage in the sub-scanning direction, and attached to the base member;
a front cover attached to the base member or the main body case for opening and closing the opening;
A leakage light suppression cover having a shielding portion that suppresses leakage of light emitted from the light irradiation device to the outside from between the front cover and the platen, and is attached to the base member or the main body case. and a leakage light suppression cover,
The leakage light suppression cover is configured to change an angle with respect to the front cover according to the thickness of the recording medium placed on the platen,
The shielding portion is formed in a plate shape extending in the main scanning direction,
When the thickness of the recording medium placed on the platen is thicker than a predetermined thickness, the shielding section is arranged above at least a part of the platen and is positioned in the sub-scanning direction of the shielding section. The inkjet printer, wherein an upstream end is positioned upstream in the sub-scanning direction from a lower end of the front cover. a base member;
a platen provided on the base member and on which a recording medium is placed;
a carriage provided on the base member, positioned above the platen, and movable in a main scanning direction;
an ink head that is mounted on the carriage and ejects photocurable ink onto the recording medium that is conveyed in a sub-scanning direction perpendicular to the main scanning direction;
a light irradiation device that is mounted on the carriage and that irradiates light toward the photocurable ink ejected onto the recording medium;
a body case having an opening formed between the platen and downstream of the carriage in the sub-scanning direction and attached to the base member;
a front cover attached to the base member or the main body case for opening and closing the opening;
A leakage light suppression cover having a shielding portion that suppresses leakage of light emitted from the light irradiation device to the outside from between the front cover and the platen, and is attached to the base member or the main body case. and a leakage light suppression cover,
The leakage light suppression cover is configured to change an angle with respect to the front cover according to the thickness of the recording medium placed on the platen,
The platen includes a first platen having a flat top surface, and a first platen disposed downstream in the sub-scanning direction from the first platen. a second platen that tilts toward and guides the movement of the recording medium;
a guide table that is used when the thickness of the recording medium placed on the platen is greater than a predetermined thickness and guides the movement of the recording medium conveyed from the first platen;
The inkjet printer, wherein the guide table is arranged below the first platen, above a portion of the second platen, and below the shielding section. A first support wall that supports the leakage light suppression cover when the thickness of the recording medium placed on the platen is equal to or less than the predetermined thickness, and is inclined downward from the upstream side toward the downstream side in the sub-scanning direction. and a horizontally extending second support wall that indirectly supports the leakage light suppression cover when the recording medium placed on the platen is thicker than the predetermined thickness, 12. The inkjet printer of claim 11, comprising a support member provided on the base member. the second support wall is configured to support the guide table;
13. The inkjet printer according to claim 12, wherein said guide table comprises a cover support wall that supports said leakage light suppression cover from below. 14. An end portion of the leakage light suppression cover on the downstream side in the sub-scanning direction is located downstream in the sub-scanning direction from an end portion of the guide table on the downstream side in the sub-scanning direction. The inkjet printer according to any one of Claims 1 to 3.

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