JP2011020339A - Inkjet recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inkjet recorder having a simple ink mist suction mechanism. <P>SOLUTION: The inkjet recorder 10 which discharges ink drops IK on recording paper PA from a plurality of nozzles 21n arranged in a head block 21 includes: a head holder 22 in which a plurality of ink mist passages IMT for passing ink mist IM discharged from the plurality of nozzles 21n in addition to the ink drops IK are formed at each side of main scanning direction side faces of head blocks 21 corresponding to each ink color; an ink mist suction duct 41 in which a long duct hole 41a is formed at the downstream side of the ink mist flowing direction in the plurality of ink mist passages IMT; and an ink mist suction part (43) which is attached at the tip 41d side of the recording paper conveying direction in the ink mist suction duct 41, and sucks the ink mist IM which has passed through the plurality of ink mist passages IMT into a duct hole 41a. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  When the head block along the main scanning direction is arranged on a plurality of lines arranged at intervals in the sub-scanning direction corresponding to a plurality of ink colors and attached to the head holder, The present invention relates to an ink jet recording apparatus provided with an ink mist suction mechanism capable of sucking ink mist discharged from a plurality of nozzles provided in the nozzle other than ink droplets.

  In general, an inkjet recording apparatus to which an inkjet method is applied records (prints) an image or characters by ejecting ink droplets from a nozzle of an inkjet head toward recording paper based on print data based on image information or character information. In addition, since print data can be recorded (printed) in color on recording paper using multi-colored ink, it is frequently used as a home or business printer.

  As an example of this type of ink jet recording apparatus, a line type ink jet head in which a plurality of head blocks having a plurality of nozzles along a line direction as a main scanning direction on a recording paper is used is fixed. Then, there is a type in which at least one line or more of print data can be collectively recorded at a high speed on the recording paper by feeding the recording paper in the sub-scanning direction orthogonal to the main scanning direction.

  By the way, when recording print data on a recording paper using a line-type inkjet head, fine mist-like ink mist other than the main droplets is generated around the ink droplets that are the main droplets discharged from a plurality of nozzles. If the ink mist adheres to the recording paper, the print quality is deteriorated, and if the ink mist adheres to the surrounding head block or the device member, the head block or the device member is not only soiled. Blocks and devices may malfunction.

  In order to solve the above problems, there is an ink jet recording apparatus using a full line type recording head, which includes an ink mist suction mechanism (for example, see Patent Document 1).

  The conventional inkjet recording apparatus 100 shown in FIG. 4 is disclosed in Patent Document 1, and will be briefly described here with reference to Patent Document 1.

  As shown in FIG. 4, in the conventional ink jet recording apparatus 100, the recording head 101 is formed to be long in the direction of the lateral width B of the recording paper PA and is configured as a full line type.

  A humidified air duct 102 is provided along one longitudinal side surface 101 a of the recording head 101, and a humidifying fan 103 and a water supply material 104 are attached to one upper end side of the humidified air duct 102. A water supply unit 105 is provided in the upper part of the humidified air duct 102, and an exhaust port 102a is formed in the vicinity of the ejection surface port 101c of the recording head 101 on the other lower end side of the humidified air duct 102.

  In addition, an intake duct 106 is provided along the other side surface 101 b facing the one side surface 101 a in the longitudinal direction of the recording head 101, and an intake fan 107 and a recovery filter 108 are disposed on one upper end side of the intake duct 106. And an intake port 106 a is formed in the vicinity of the discharge surface port 101 c of the recording head 101 on the other lower end side of the intake duct 106.

  In the conventional inkjet recording apparatus 100 configured as described above, only the ink mist suction mechanism is described. Ink droplets (not shown) ejected from the ejection surface port 101c of the recording head 101 are placed on the recording paper PA. During printing by discharging, ink mist (not shown) discharged from the discharge surface port 101 c of the recording head 101 other than ink droplets is sucked from the intake port 106 a of the intake duct 106 by the suction force of the intake fan 107. After the ink mist is collected while being sucked into 106 and passing through the collection filter 108, the remainder that has passed through the collection filter 108 is discharged to the outside by the intake fan 107.

JP 2006-68942 A

  By the way, according to the conventional inkjet recording apparatus 100 disclosed in Patent Document 1, ink mist ejected from the ejection surface port 101c of the recording head 101 other than ink droplets is collected by the intake duct 106, the intake fan 107, and the recovery filter 108. Although it can be collected, when a plurality of recording heads 101 are mounted in the apparatus 100 corresponding to, for example, a plurality of ink colors, an intake duct 106 must be provided for each of the plurality of recording heads 101. This increases the size of the inkjet recording apparatus 100 and increases the number of intake fans 107 and recovery filters 108, which causes the conventional inkjet recording apparatus 100 to be expensive.

  Further, as shown in FIG. 5, a plurality of recording heads 101 are spaced between adjacent recording heads 101 at a predetermined pitch P along a line direction (main scanning direction) orthogonal to the conveyance direction of the recording paper PA. When the ink drop IK is temporarily attached to the head mounting surface 110a of the head holder 110 with W and the ink droplets IK as the main droplets are ejected from the ejection surface port 101c of each recording head 101 onto the recording paper PA, the ejection surface port Ink mist IM other than ink droplets IK is also ejected from 101c, but this ink mist IM is blown up toward the head mounting surface 110a of head holder 110 in the direction of conveyance of recording paper PA as indicated by the arrow. In order to contaminate the inside of the apparatus, it is necessary to eliminate the flow in which the ink mist IM is blown up.

  Therefore, when the head blocks along the main scanning direction are arranged on a plurality of lines arranged at intervals in the sub-scanning direction corresponding to a plurality of ink colors and attached to the head holder, An object of the present invention is to provide an ink jet recording apparatus capable of sucking ink mist discharged from each nozzle other than ink droplets by an ink mist suction mechanism having a simple structure and reducing the size of the apparatus.

The present invention has been made in view of the above problems. In the first invention, a head block corresponding to a plurality of ink colors is provided in the main scanning direction.
Further, a plurality of the head blocks are provided on the line at intervals in the sub-scanning direction,
An ink jet recording apparatus that ejects ink droplets from a plurality of nozzles provided in the head block onto recording paper conveyed in the sub-scanning direction,
A plurality of ink mist passages through which ink mist discharged from the plurality of nozzles other than the ink droplets passes are respectively formed on the side of the side surface in the main scanning direction of the head block corresponding to each ink color;
A long duct hole is provided downstream of the plurality of ink mist passages in the ink mist flow direction, and at least one ink mist suction hole is formed on a side surface of the duct hole facing the plurality of ink mist passages. An ink mist suction duct formed with
Of the ink mist suction duct, the ink mist attached to the leading end side in the recording paper conveyance direction and passing through the plurality of ink mist passages is passed through the at least one ink mist suction hole. An ink mist suction section for sucking into the holes;
An ink jet recording apparatus comprising:

The second invention is the ink jet recording apparatus of the first invention, wherein
The at least one or more ink mist suction holes are respectively formed in portions of the side surfaces of the duct holes facing the respective ink mist passages.

The third invention is the ink jet recording apparatus of the first invention,
An ink mist collection filter for collecting the ink mist is detachably attached between the leading end of the ink mist suction duct in the recording paper conveyance direction and the ink mist suction fan of the ink mist suction section. This is an ink jet recording apparatus.

The fourth invention is the ink jet recording apparatus of the second invention,
2. An ink jet recording apparatus according to claim 1, wherein an ink mist collecting filter for collecting the ink mist is detachably attached outside the side surface of the duct hole.

In the fifth invention, a head block corresponding to a plurality of ink colors is provided in the main scanning direction.
Further, a plurality of the head blocks are provided on the line at intervals in the sub-scanning direction,
An ink jet recording apparatus that ejects ink droplets from a plurality of nozzles provided in the head block onto recording paper conveyed in the sub-scanning direction,
A head holder formed on the side of the side surface in the main scanning direction of the head block so that ink mist ejected from the plurality of nozzles other than the ink droplets can pass through;
An ink mist suction duct formed on the downstream side of the head holder in the ink mist flow direction for sucking the ink mist;
An ink jet recording apparatus comprising:

  According to the ink jet recording apparatus of the first invention, an ink jet head in which a plurality of head blocks corresponding to a plurality of ink colors are provided in the main scanning direction, and a plurality of head blocks are provided on the line at intervals in the sub scanning direction. In particular, the side of the side surface in the main scanning direction of the head block corresponding to each ink color has a plurality of ink mist passages through which ink mist ejected from a plurality of nozzles other than ink droplets passes on the head holder. And a long ink mist suction duct is installed on the downstream side of the plurality of ink mist passages in the ink mist flow direction, and among these ink mist suction ducts, the leading end side in the recording paper transport direction By attaching the ink mist suction part to the nozzle, the ink mist suction part can be Ink mist ejected in addition to ink droplets can be sucked into the duct hole of the ink mist suction duct through a plurality of ink mist passages, and one ink mist suction duct and one ink mist suction part are provided. Therefore, the ink mist suction mechanism can be downsized with a simple structure, and the ink jet recording apparatus can be provided at low cost.

  Further, according to the ink jet recording apparatus of the second invention, at least one or more ink mist suction holes are formed in portions of the side surfaces of the duct hole facing the respective ink mist passages. In addition to the effects of the first invention, the ink mist passing through each ink mist passage can be sucked into the duct hole of the ink mist suction duct through each ink mist suction hole.

  According to the ink jet recording apparatus of the third aspect of the invention, the ink mist collecting unit collects the ink mist between the leading end of the ink mist suction duct in the recording paper conveyance direction and the ink mist suction fan of the ink mist suction unit. Since the filter is detachably attached, the effect of the first invention can be obtained, and the ink mist sucked into the duct hole of the ink mist suction duct can be collected by the ink mist collecting filter. it can.

  Further, according to the ink jet recording apparatus of the fourth invention, since the ink mist collecting filter for collecting the ink mist is detachably attached to the outside of the side surface of the duct hole, the effect of the second invention can be obtained. In addition, the ink mist that has passed through each ink mist passage can be collected by the ink mist collection filter before being sucked into the duct hole of the ink mist suction duct, and the ink mist collection filter can be easily used. Detachable.

  According to the ink jet recording apparatus of the fifth invention, the head blocks corresponding to a plurality of ink colors are provided in the main scanning direction, and the head blocks are provided on the line at intervals in the sub scanning direction. When an inkjet head is used, in particular, a head holder formed on the side of the side surface in the main scanning direction of the head block so that ink mist ejected from a plurality of nozzles other than ink droplets can pass, and ink of the head holder Since the ink mist suction duct is provided on the downstream side in the mist flow direction and sucks the ink mist, the ink mist can be sucked by the ink mist suction duct.

(A), (b) is the whole block diagram which showed the whole structure of the inkjet recording device of the Example based on this invention. FIG. 2 is a perspective view schematically showing an ink mist suction mechanism in a state where a head mounting surface of the head holder shown in FIG. 1 is removed in the ink jet recording apparatus according to the embodiment of the present invention. (A), (b) is the whole block diagram which showed the whole structure of the inkjet recording device of the modification which employ | adopted the ink mist suction mechanism part of the modification which changed the ink mist suction mechanism part of the Example partially. . It is the perspective view which showed the conventional inkjet recording device. FIG. 5 is a diagram showing a state in which ink droplets and ink mist are ejected from the ejection surface of the recording head when a plurality of the full-line type recording heads shown in FIG. 4 are attached to the head attachment surface of the head holder.

  Hereinafter, an embodiment of an ink jet recording apparatus according to the present invention will be described in detail with reference to FIGS.

  As shown in FIGS. 1A and 1B, in the ink jet recording apparatus 10 according to the embodiment of the present invention, a plurality of line type ink jet heads 20 are used to print the print data in color on the recording paper PA. It is configured so that full lines can be recorded at a high speed in batches.

  The line-type inkjet head 20 is provided for each color corresponding to a plurality of colors of ink. In this embodiment, print data input into the inkjet recording apparatus 10 is recorded (printed) in color. C (cyan), K (black), M (magenta), and Y (yellow) are used as an example of a plurality of colors of ink. In this embodiment, recording (printing) is performed in the order of C, K, M, and Y. Therefore, the plurality of line-type ink jet heads 20C, 20K, 20M, and 20Y corresponding to the respective ink colors C, K, M, and Y are illustrated on the left side with respect to the conveyance direction (arrow X1 direction) of the recording paper PA. By attaching to the head attachment surface 22a of the head holder 22 from right to left, each ink color of C, K, M, and Y can be overwritten.

  At this time, since the plurality of line-type inkjet heads 20C, 20K, 20M, and 20Y attached to the head attachment surface 22a of the head holder 22 are all configured with the same structure, in the following description, one line-type inkjet head is used. The head 20 will be described.

  In the one line type ink jet head 20 described above, the head block 21 having a plurality of nozzles 21n for ejecting ink droplets IK by the ink jet method in the line direction which is the main scanning direction (Y axis direction) to the recording paper PA is two-dimensional. A plurality of them are arranged.

  In this embodiment, a plurality of head blocks 21 are arranged along one line corresponding to the main scanning direction (Y-axis direction) and are orthogonal to the main scanning direction (Y-axis direction). It is arranged in a total of two lines (in the X-axis direction), and between adjacent lines where each head block 21 is arranged is set to a predetermined pitch P, and each head block is located between adjacent lines. They are alternately arranged in a staggered manner so that 21 partially overlap.

  At this time, the head blocks 21 that are two-dimensionally arranged are arranged in a zigzag pattern, for example, three by three for convenience of illustration along each line, but the quantity on one line is limited to three. It is not something.

  Since one line-type inkjet head 20 is repeatedly arranged for each ink color, when a plurality of line-type inkjet heads 20C, 20K, 20M, 20Y are attached to the attachment surface 22a of the head holder 22, A plurality of head blocks 21 are arranged at substantially equal intervals at the above-described predetermined pitch P over a total of 8 lines.

  When ink droplets IK, which are main droplets, are selectively ejected onto the recording paper PA from a plurality of nozzles 21n provided in a plurality of head blocks 21 according to print data, in the inkjet method, for example, 1 A driving signal is applied to each piezo element provided corresponding to each nozzle 21n formed along the main scanning direction (Y-axis direction) with a resolution of 300 pieces per inch (300 dpi) to displace the diaphragm. A piezo method in which ink in the ink reservoir chamber is ejected from the nozzle 21n, an electrostatic method in which a drive signal is applied to the electrostatic gap to displace the diaphragm to eject ink in the ink reservoir chamber from the nozzle 21n, or an ink reservoir chamber The film boiling ink is formed by ejecting ink from the nozzle 21n by the pressure change caused by the bubbles generated by heating the ink with the micro heater of the film. Include Tsu preparative method, it may be used any method in the present invention.

  Further, the recording paper transport unit 30 for transporting the recording paper PA is provided below the plurality of line-type ink jet heads 20C, 20K, 20M, and 20Y.

  The recording paper transport unit 30 includes a belt-shaped belt platen 31 formed by penetrating a plurality of air suction holes 31a at substantially equal intervals, and first to third pulleys 32 to span the belt-shaped belt platen 31. 34, a motor 35 connected to the first pulley 32 for rotating the belt-like belt platen 31, and a suction box 36 for sucking air from a plurality of air suction holes 31a formed in the belt platen 31. .

  For example, when a recording paper PA of A4 size or A3 size is mounted on the belt-like belt platen 31, air is sucked from a plurality of air suction holes 31a formed in the belt platen 31, and recording is performed. With the paper PA fixed on the belt platen 31, the print data can be printed in color by the plurality of line-type ink jet heads 20C, 20K, 20M, and 20Y while the recording paper PA is conveyed in the direction of the arrow X1 by the rotation of the belt platen 31. It is like that.

  When printing ink of a plurality of colors, the recording paper PA is reciprocated in the X-axis direction via the belt platen 31, and after returning the recording paper PA to the initial position for each ink color, the recording paper PA Can be repeatedly conveyed in the direction of the arrow X1.

  Here, when the ink droplets IK that are the main droplets are ejected from the nozzles 21n of the plurality of head blocks 21 provided in the line-type inkjet head 20 onto the recording paper PA, the mist is ejected in addition to the main droplets. An ink mist suction mechanism 40 for sucking the ink mist IM will be described with reference to FIGS.

  2 schematically shows the ink mist suction mechanism 40 with the head mounting surface 22a of the head holder 22 shown in FIG. 1 removed.

  As shown in FIG. 1 and FIG. 2, in the ink mist suction mechanism 40 constituting the main part of this embodiment, a plurality of head blocks 21 are set on a mounting surface 22a of the head holder 22 over a total of eight lines. When the ink is disposed at the pitch P, the ink mist IM is ejected from the nozzles 22n of the plurality of head blocks 21 other than the ink droplets IK between the head blocks 21 disposed on adjacent lines. The ink mist passage IMT is set along the line with the passage width W set, and the ink mist passage is also formed on the side surface of the end side of the plurality of head blocks 21 disposed on the left and right ends of the line. The IMT is formed along the left and right lines.

  Therefore, on the head holder 22, the head blocks 21 along the main scanning direction are arranged on eight lines arranged at intervals in the sub-scanning direction corresponding to the four ink colors, and each ink An ink mist passage IMT is formed on the side of one main scanning direction side surface 21a of the head block 21 corresponding to the color and on the side of the other main scanning direction side surface 21b opposite to the one main scanning direction side surface 21a. Therefore, nine ink mist passages IMT are formed in total as shown in FIG.

  The ink mist suction duct 41 for sucking the ink mist IM discharged from each nozzle 22n of the plurality of head blocks 21 is a rectangular duct hole 41a {Fig. 1 (a) only]. And a plurality of ink mist suction holes 41c.

  In the above-described ink mist suction duct 41, the duct hole 41a is disposed on the downstream side in the ink mist flow direction of the plurality of ink mist passages IMT and orthogonal to the respective lines, and faces the ink mist passages IMT. Ink mist suction holes 41c are formed in a rectangular shape only on a side surface 41b (hereinafter referred to as a duct side surface) of the duct hole 41a so as to face each ink mist passage IMT, and a plurality of heads are formed on the duct side surface 41b. The part facing the block 21 is closed.

  Accordingly, the plurality of ink mist suction holes 41c formed in the duct side surface 41b of the ink mist suction duct 41 sucks the ink mist IM that has passed through the plurality of ink mist passages IMT facing the ink mist suction holes 41c. The duct 41 can be sucked into the duct hole 41a.

  In this embodiment, the ink mist suction hole 41c is formed in a portion of the duct side surface 41b of the ink mist suction duct 41 facing each ink mist passage IMT. However, the present invention is not limited to this. It suffices if at least one ink mist suction hole 41c is formed in the duct side surface 41b.

  At this time, the ink mist suction duct 41 is formed integrally with the head holder 22 on one end side in the line direction of the head holder 22, and is formed separately from the head holder 22 so as to be in the line direction of the head holder 22. Either method of positioning and attaching to one end side of the ink mist may be used, but positioning with respect to each ink mist suction hole 41c facing each ink mist passage IMT is easier when formed integrally with the head holder 22. .

  Furthermore, the ink mist suction duct 41 is installed on the one end side in the line direction of the head holder 22 substantially in parallel with the conveyance direction (arrow X1 direction) of the recording paper PA due to the arrangement relationship described above. Of the ink mist suction duct 41, an ink mist collection filter 42 for collecting the ink mist IM as an ink mist suction section and an ink for sucking the ink mist IM are disposed on the recording paper conveyance direction front end 41d side. A mist suction fan 43 is detachably attached via a bracket 44 (only shown in FIG. 1).

  At this time, the ink mist collecting filter 42 detachably attached between the leading end 41d of the ink mist suction duct 41 in the recording paper transport direction and the ink mist suction fan 43 is used for ink mist suction as will be described later. The ink mist IM sucked into the duct hole 41a of the ink mist suction duct 41 by the fan 43 can be collected.

  The recording paper conveyance direction rear end 41e of the ink mist suction duct 41 opposite to the recording paper conveyance direction front end 41d may be either in an open state or a closed state.

  In the ink mist suction mechanism 40 of the embodiment configured as described above, when the ink mist suction fan 43 attached to the recording paper transport direction front end 41d side of the ink mist suction duct 41 is operated, the ink mist suction fan 43 is operated. Since the air in the duct hole 41a of the duct 41 is discharged outside in the direction of arrow A, the inside of the duct hole 41a is in a negative pressure state.

  When the inside of the duct hole 41a of the ink mist suction duct 41 is in a negative pressure state, the air outside each ink mist suction hole 41c formed only on the duct side surface 41b of the ink mist suction duct 41 is used for ink mist suction. Since an action of sucking into the duct hole 41 a of the duct 41 occurs, the ink mist IM discharged from each nozzle 22 n of the plurality of head blocks 21 and passing through each ink mist passage IMT is the duct side surface 41 b of the ink mist suction duct 41. The ink mist suction holes 41c are sucked into the duct holes 41a and collected by the ink mist collection filter 42 attached to the recording paper transport direction front end 41d side of the ink mist suction duct 41. The remainder after passing through the ink mist collecting filter 42 is the ink mist absorbing fan 4. It is discharged to the outside in the arrow A direction by.

  Therefore, according to the ink jet recording apparatus 10 of the embodiment, the head block 21 having the plurality of nozzles 21n for ejecting the ink droplets IK by the ink jet method in the line direction which is the main scanning direction to the recording paper PA becomes a plurality of ink colors. Correspondingly, the respective heads which are respectively mounted on a plurality of lines arranged at intervals in the sub-scanning direction and which are disposed between the head blocks 21 disposed on adjacent lines and on both ends of the line. A head holder 22 in which a plurality of ink mist passages IMT through which ink mist IM discharged from a plurality of nozzles 21n other than the ink droplets IK is passed along each line are formed on the side of the side surface on the end side of the block 21; A long duct hole 41a perpendicular to each line is provided downstream of the plurality of ink mist passages IMT in the ink mist flow direction. An ink mist suction duct 41 having at least one ink mist suction hole 41c formed in a side surface 41b of the duct hole 41a facing the plurality of ink mist passages IMT, and an ink mist suction duct 41 Among them, the ink that is attached to the front end 41d in the recording paper conveyance direction and sucks the ink mist IM that has passed through the plurality of ink mist passages IMT into the duct hole 41a through at least one ink mist suction hole 41c. Since the mist suction fan 43 is provided, even when the plurality of head blocks 21 are attached to the head holder 22, the ink from the nozzles 22n of the plurality of head blocks 21 is absorbed by the suction force of the ink mist suction fan 43. A plurality of ink mist passages IMT for discharging the ink mist IM other than the droplet IK The ink mist suction duct 41 can be sucked into the duct hole 41a and only one ink mist suction duct 41 and one ink mist suction fan 43 are provided. The suction mechanism unit 40 can be reduced in size with a simple structure, and the inkjet recording apparatus 10 of the embodiment can be provided at low cost.

  Next, a modified ink jet recording apparatus 10 ′ that employs a modified ink mist suction mechanism 40 ′ in which the ink mist suction mechanism 40 of the embodiment is partially deformed will be briefly described with reference to FIG. .

  As shown in FIG. 3, the inkjet recording apparatus 10 ′ according to the modification is the same as the embodiment because only the point that the ink mist suction mechanism 40 ′ according to the modification is adopted is different from the embodiment. The same reference numerals are given to the constituent members, and only the illustrations are shown, and different constituent members will be assigned new reference numerals to the embodiments, and different points will be mainly described.

  In the ink mist suction mechanism 40 ′ of the above-described modified example, the ink mist collecting duct 41 is not attached to the recording paper transport direction front end portion 41d of the ink mist suction duct 41, and the ink mist suction mechanism 41 ′ is not attached to the recording paper transport direction front end portion 41d. A suction fan 43 is attached via a bracket 45.

  Further, in the ink mist suction duct 41, a plurality of ink mist suction holes 41c are formed in a rectangular shape only on the side surface (duct side surface) 41b of the duct hole 41a facing each ink mist passage IMT. As in the embodiment, an ink mist collection filter 46 for collecting the ink mist IM along the outside of the duct side surface 41b of the ink mist suction duct 41 is detachably attached using a double-sided tape or the like. The ink mist collection filter 46 covers a plurality of ink mist suction holes 41 c formed in the duct side surface 41 b of the ink mist suction duct 41.

  In the ink mist suction mechanism section 40 ′ of the modified example configured as described above, when the ink mist suction fan 43 attached to the ink mist suction duct 41 on the front end 41d side in the recording sheet transport direction is operated, each ink mist After the ink mist IM that has passed through the passage IMT is collected by the ink mist collecting filter 46, the ink mist that has passed through the ink mist collecting filter 46 is formed on the duct side surface 41b of the ink mist suction duct 41. The ink mist sucks into the duct hole 41a of the ink mist suction duct 41 from the suction hole 41c and is discharged to the outside in the direction of arrow A by the ink mist absorbing fan 43.

  Accordingly, in the ink jet recording apparatus 10 ′ according to the modified example, the ink mist suction mechanism 40 ′ according to the modified example can be downsized with a simple structure and the ink passing through each ink mist passage IMT is substantially the same as in the embodiment. The mist IM can be collected before being sucked into the duct hole 41a of the ink mist suction duct 41, and the ink mist collection filter 46 can be easily attached and detached.

  In the ink mist suction mechanism section 40 of the embodiment and the ink mist suction mechanism section 40 ′ of the modified example, the ink mist suction fan 43 is not attached to the front end 41d of the ink mist suction duct 41 in the recording paper conveyance direction. When an ink mist blower fan (not shown) is temporarily attached to the recording paper feed direction rear end 41e opposite to the recording paper feed direction front end portion 41d, the ink mist blower fan (not shown). The air sent out from the ink mist suction duct 41 into the duct hole 41a is discharged from the ink mist suction holes 41c formed in the duct side surface 41b of the ink mist suction duct 41 toward the ink mist passage IMT. As a result, the ink mist IM that has passed through each ink mist passage IMT becomes ducted in the ink mist suction duct 41. Because they are not sucked into the ink mist suction holes 41c formed in the side surface 41b, ink mist blowing fan (not shown) was found to be unusable.

  In the above-described ink jet recording apparatuses 10 and 10 ′, the example in which the ink IK is used as the viscous liquid agent has been described. However, the present invention can be applied to a cream solder or an adhesive as the viscous liquid agent.

10: Inkjet recording apparatus of example,
10 '... the inkjet recording apparatus of a modification,
20 (20C, 20K, 20M, 20Y) ... line type inkjet head,
21: Head block, 21a: One side surface in the main scanning direction,
21b ... the other side surface in the main scanning direction, 21n ... nozzle,
22 ... Head holder, 22a ... Head mounting surface,
30... Recording paper transport unit, 31... Belt platen, 32 to 34.
35 ... motor, 36 ... suction box,
40: Ink mist suction mechanism of the embodiment,
40 '... a modified example of the ink mist suction mechanism,
41 ... Duct for sucking ink mist, 41a ... Duct hole, 41b ... Side surface (duct side surface),
41c... Ink mist suction hole, 41d.
41e: Rear end of recording paper conveyance direction,
42 ... Filter for collecting ink mist, 43 ... Fan for sucking ink mist,
44, 45 ... bracket, 46 ... filter for collecting ink mist,
IK ... ink droplet, IM ... ink mist, IMT ... ink mist passage, PA ... recording paper,
P: A predetermined pitch between adjacent lines where each head block is arranged,
W: The width of the ink mist passage.

Claims (5)

Head blocks corresponding to a plurality of ink colors are provided in the main scanning direction,
Further, a plurality of the head blocks are provided on the line at intervals in the sub-scanning direction,
An ink jet recording apparatus that ejects ink droplets from a plurality of nozzles provided in the head block onto recording paper conveyed in the sub-scanning direction,
A plurality of ink mist passages through which ink mist discharged from the plurality of nozzles other than the ink droplets passes are respectively formed on the side of the side surface in the main scanning direction of the head block corresponding to each ink color;
A long duct hole is provided downstream of the plurality of ink mist passages in the ink mist flow direction, and at least one ink mist suction hole is formed on a side surface of the duct hole facing the plurality of ink mist passages. An ink mist suction duct formed with
Of the ink mist suction duct, the ink mist attached to the leading end side in the recording paper conveyance direction and passing through the plurality of ink mist passages is passed through the at least one ink mist suction hole. An ink mist suction section for sucking into the holes;
An ink jet recording apparatus comprising:   2. The ink jet recording apparatus according to claim 1, wherein the at least one ink mist suction hole is formed in a portion of the side surface of the duct hole facing each ink mist passage.   An ink mist collection filter for collecting the ink mist is detachably attached between the leading end of the ink mist suction duct in the recording paper conveyance direction and the ink mist suction fan of the ink mist suction section. 2. The ink jet recording apparatus according to claim 1, wherein   3. The ink jet recording apparatus according to claim 2, wherein an ink mist collecting filter for collecting the ink mist is detachably attached outside the side surface of the duct hole. Head blocks corresponding to a plurality of ink colors are provided in the main scanning direction,
Further, a plurality of the head blocks are provided on the line at intervals in the sub-scanning direction,
An ink jet recording apparatus that ejects ink droplets from a plurality of nozzles provided in the head block onto recording paper conveyed in the sub-scanning direction,
A head holder formed on the side of the side surface in the main scanning direction of the head block so that ink mist ejected from the plurality of nozzles other than the ink droplets can pass through;
An ink mist suction duct formed on the downstream side of the head holder in the ink mist flow direction for sucking the ink mist;
An ink jet recording apparatus comprising:

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