JP2014136321A - Recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce discharge failure of ink by suppressing transfer of heat applied for drying the ink to a nozzle row portion.SOLUTION: A recording device includes: a plurality of line heads 1, 2, 3, and 4 disposed separated to each other in a conveying direction of recording material P; exhaust ports 5, 6, 7, 8, and 9 provided at both sides of an area that is occupied by each of nozzle rows 11, 12, 13, and 14 of the respective line heads in the conveying direction; and a plurality of conveying rollers 15, 16, 17, 18, 19, 20, 21, and 22 provided at positions facing the corresponding exhaust ports to rotate while being in contact with the recording material, each of the conveying rollers includes a heating part for applying heat to the recording material to serve as a heating roller 10.

Description

  The present invention relates to a recording apparatus that includes a recording head that discharges ink onto a recording material to be conveyed, and a drying unit that dries the ink discharged onto the recording material.

  A conventional recording apparatus is described in Patent Document 1. In Patent Document 1, a heating unit corresponding to the drying unit is mounted on a recording head. Before the ink is ejected from the recording head onto the recording material, the recording material is preheated by the heating means, and the ink ejected by the preheating is heated and dried immediately.

Japanese Patent Laid-Open No. 11-151807

  In the conventional recording apparatus, since the heating means is mounted on the recording head, there is a possibility that heat is transmitted to the nozzle array for ejecting ink and the temperature of the nozzle array rises, leading to defective ink ejection. In particular, in the trend of increasing the recording speed in recent years, it is necessary to promote drying more, and therefore, there is a greater possibility that the ejection failure based on the heat will occur.

A structure is conceivable in which the heating means is separated from the recording head, and the heating means is provided on a platen that faces the recording head and defines the position of the recording material relative to the recording head.
In this structure, since the heating unit is separated from the recording head, heat transfer to the nozzle row can be suppressed. However, since the heating means is provided at a position facing the recording head, the dried ink vapor is likely to come into contact with the nozzle rows. For this reason, there is a risk of ink ejection failure.

  The object of the present invention is to suppress the heat applied when the ink is dried from being transmitted to the nozzle row, and to collect the dried ink vapor so that it does not contact the nozzle row, thereby reducing ink ejection defects. There is to do.

  In a first aspect of the recording apparatus according to the present invention for solving the above-described problem, a region occupied by a plurality of line heads spaced apart in the conveyance direction of a recording material and each nozzle row of each line head An exhaust port provided on both sides in the transport direction, and a plurality of transport rollers provided at positions facing the exhaust ports and rotating in contact with the recording material, the transport roller, A heating unit for applying heat to the recording material is provided, which also serves as a heating roller.

Here, the “exhaust port” means a suction port of an exhaust unit such as an exhaust fan that is exhausted by sucking steam or hot air generated by drying the ink by the heat of the heating roller.
In addition, the conveyance roller “provided at a position facing the exhaust port” means that the contact point between the conveyance roller that also serves as a heating roller and the recording material is out of the area occupied by the nozzle row. The first condition means a position facing the exhaust port. Therefore, the position where the contact point is not located in front of the exhaust port but is slightly deviated from the front side is also included as long as it is out of the area occupied by the nozzle row. Since the heat of the heating roller is transmitted from the contact point to the recording material, the contact point is located outside the region occupied by the nozzle row.
If the contact point is located facing the exhaust port from the front, the heat is directly sucked into the exhaust port from the front, which is effective.

  According to this aspect, since the conveyance roller that also serves as the heating roller is located facing the exhaust port and does not face the area occupied by the nozzle row of the line head, the heat of the heating roller transmitted when drying the ink The nozzle row is not easily affected by the above. Therefore, ink ejection defects can be reduced.

  According to a second aspect of the recording apparatus of the present invention, in the first aspect, the pair of transport rollers adjacent to each other in the transport direction with a region occupied by each nozzle row of each line head is transported. An interval between the recording material and the nozzle row is defined.

According to this aspect, the recording material is stretched between the pair of transport rollers in a tensioned state, so that the interval between the recording material and the nozzle row is defined. Since the position of the roller with respect to the nozzle row is set, the nozzle row is less susceptible to the influence of heat from the transport roller that also serves as the heating roller. The effect of the present invention is remarkable when applied to a recording apparatus of this kind of structure.
In the case of this structure, the recording material is not constrained at the central portion between the pair of transport rollers, so that it is easy to shake. Therefore, the arrangement of the nozzle row with respect to the pair of transport rollers is less affected by the shake when the nozzle row is positioned closer to one of the transport rollers than when the nozzle row is positioned to face the central portion. Therefore, it is preferable. In addition, it is preferable that the pair of transport rollers be positioned closer to the downstream transport roller in the transport direction from the viewpoint of reducing the influence of heat on the nozzle rows.

  According to a third aspect of the recording apparatus of the present invention, in the first aspect or the second aspect, at least a part of the heating roller is a drying roller located on the upstream side and a preheating located on the downstream side. And a roller.

The temperature suitable for drying the ink ejected onto the recording material and the temperature suitable for preheating the recording material before ejecting the ink onto the recording material may differ depending on the type of ink. is there.
According to this aspect, since the drying roller and the preheating roller are respectively provided, it is possible to easily cope with cases where the respective temperatures are different. That is, the temperature suitable for drying the ink ejected on the recording material differs depending on the type of ink and the temperature suitable for preheating the recording material before ejecting the ink onto the recording material In addition, it is possible to easily cope with the case where temperature adjustment is performed according to the recording density of ink to be recorded on the recording material.

According to a fourth aspect of the recording apparatus of the present invention, in any one of the first to third aspects, the heating roller generates heat by induction heating. .
As a heating roller that generates heat by this induction heating, for example, a super heat roll (SHR) manufactured by Hydec Co., Ltd. can be used.

According to this aspect, an eddy current flows through the roller portion made of the conductive material of the heating roller by induction heating, and Joule heat is generated by the eddy current and the electrical resistance of the roller portion. Fever.
Therefore, since only the portion where the eddy current flows is self-heated, direct heating and local heating are performed, and the heating efficiency can be easily improved as compared with the conventional indirect heating by the heater.
In addition, according to this aspect, since there is no heat source such as a heater, the surroundings do not have to be high in temperature, which is more effective.
Moreover, according to this aspect, since it is direct heating, rapid heating is possible, and the start-up when the heating roller is turned on can be improved.

  Further, according to this aspect, it is possible to achieve only a portion necessary for drying the ink ejected to the recording material at a necessary high temperature and to suppress the temperature increase of other members around it. As a result, the recording material can be dried at high speed while being conveyed at high speed. This high speed drying can improve the recording quality.

According to a fifth aspect of the recording apparatus of the present invention, in any one of the first to fourth aspects, the upstream side of the exhaust port located upstream in the transport direction is adjacent to the exhaust port. And a pretreatment liquid unit for adhering a pretreatment liquid to the recording material,
The temperature of the heating roller positioned first on the downstream side of the pretreatment liquid unit is set to be higher than the temperatures of other heating rollers positioned downstream in the transport direction.

In the case of forming a recorded matter (image) by ejecting ink onto high-quality paper, cloth or the like, the ink is ejected after attaching a pretreatment liquid in order to ensure recording quality.
According to this aspect, the pretreatment with the pretreatment liquid can be executed as part of the recording operation in the recording apparatus. In addition, the pretreatment liquid needs to be dried well in order to reduce bleeding prior to ink ejection. According to this aspect, the temperature of the heating roller for drying the pretreatment liquid is higher than the temperatures of the other heating rollers. Therefore, the necessary dry state can be stably realized.

  According to a sixth aspect of the recording apparatus of the present invention, in the fifth aspect, the pretreatment liquid unit includes a line head for discharging the pretreatment liquid from a nozzle.

  According to this aspect, since the pretreatment liquid is discharged from the line head, the pretreatment liquid can be attached only to a necessary place according to the shape of the recorded matter (image). Therefore, the heat energy required for drying the pretreatment liquid can also be reduced, and the nozzle row is less susceptible to the influence of the heat of the heating roller transmitted when the ink is dried. Accordingly, ink ejection defects can be further reduced.

  According to a seventh aspect of the recording apparatus of the present invention, there is provided a first recording / drying execution unit that discharges ink onto one surface of the recording material to be conveyed and dries the ink; and the other surface of the recording material. A second recording drying execution unit that discharges ink to dry the ink, a first reversing roller that is positioned between the first recording drying execution unit and the second recording drying execution unit in the transport path, A second reversing roller positioned on the downstream side of the conveyance path with respect to the second recording execution unit, and the first reversing roller and the second reversing roller include the first recording drying execution unit and the second recording roller. The line head described in any one of the first to sixth aspects, wherein the first recording / drying execution part and the second recording / drying execution part are positioned below the drying execution part, Conveyance roller that also functions as an exhaust port and heating roller And characterized in that it is configured to include a pre-treatment solution unit.

  According to this aspect, in the double-sided recording apparatus, the operational effects described in any one of the first aspect to the sixth aspect can be obtained. Moreover, since the 1st inversion roller and 2nd inversion roller which are required in a double-sided recording apparatus are located in the lower part of the said double-sided recording apparatus, the weight balance of the said double-sided recording apparatus as a whole is stabilized.

  According to an eighth aspect of the recording apparatus of the present invention, in the seventh aspect, the first reverse roller and the second reverse roller generate heat by induction heating.

According to this aspect, since the first reversing roller and the second reversing roller generate heat by induction heating, they can be used as a drying roller while reversing. As a result, the amount of heat for drying by the first recording drying execution unit can be reduced, and the influence of heat on the nozzle row can be reduced by that amount. Therefore, ink ejection defects can be reduced.
Moreover, since heat is generated by induction heating, the first reversing roller and the second reversing roller that also serve as the drying roller can obtain the same operational effects as those described in the description of the fourth aspect.

  According to a ninth aspect of the recording apparatus of the present invention, in the eighth aspect, the first recording drying execution unit and the second recording drying execution unit are above the first reversing roller and the second reversing roller. Also, a heat shielding member is provided below.

According to this aspect, it is possible to prevent the heat convection generated when the ink is dried by the first reverse roller and the second reverse roller that also serve as the drying roller located below the apparatus from reaching the nozzle row above. It can be blocked and suppressed by a thermal member.
Here, the term “heat shield member” is used to include a heat-absorbing member such as a copper plate or a shield structure that structurally isolates the heat flow.

  According to a tenth aspect of the recording apparatus of the present invention, in the eighth aspect or the ninth aspect, the nozzle located at the uppermost stream of the first reverse roller and the second recording drying execution unit in the conveyance path. A cooling roller that cools in contact with the recording material is provided between the columns.

  According to this aspect, the recording material that has become high temperature by heat drying with the first reversing roller (drying roller) is cooled by passing the cooling roller, and is suitable for recording by the next second line head. Can be lowered to temperature.

  An eleventh aspect of the recording apparatus according to the present invention is the recording apparatus according to any one of the first to tenth aspects, wherein the temperature based on the heat generated by the induction heating is related to the type of ink. It is characterized by being.

Since induction heating has high heating accuracy and good controllability, it is easy to change the set temperature as appropriate. On the other hand, the appropriate heating temperature at the time of drying often varies depending on the type of ink.
According to this aspect, the temperature based on the heat generated by induction heating is related to the type of ink. Therefore, the user can perform heating and drying at a temperature suitable for the ink only by designating the type of ink. Thereby, the recording quality can be improved.

1 is a schematic side view of a main part of a recording apparatus according to a first embodiment of the invention. FIG. 6 is a schematic side view of a main part of a recording apparatus according to Embodiment 2 of the invention. The expanded side view about one of the rollers for conveyance which concerns on Example 2 of this invention. FIG. 6 is a schematic side view of a main part of a double-sided recording apparatus according to Example 3 of the invention.

Example 1 (FIG. 1)
Hereinafter, a recording apparatus according to Embodiment 1 of the present invention will be described in detail with reference to FIG.
The recording apparatus of Example 1 is an ink jet recording apparatus. The recording apparatus includes a plurality of line heads 1, 2, 3, 4 that are spaced apart from each other in the transport direction F of the recording material P, and each nozzle row 11, each line head 1, 2, 3, 4. 12, 13, and 14, the exhaust ports 5, 6, 7, 8, 9 provided on both sides in the transport direction F and the positions facing the exhaust ports 5, 6, 7, 8, 9. And a plurality of conveying rollers 15, 16, 17, 18, 19, 20, 21, 22 that are provided and rotate in contact with the recording material P. The transport rollers 15, 16, 17, 18, 19, 20, 21, and 22 also have a heating unit that applies heat to the recording material P and also serve as the heating roller 10. In FIG. 1, reference numeral 40 denotes one of feed rollers that forms a conveyance path for the recording material P.

The line heads 1, 2, 3, 4 are a yellow head 1, a magenta head 2, a cyan head 3, and a black head 4 corresponding to four colors of ink of yellow, magenta, cyan, and black. They are arranged side by side. Needless to say, the order in which the line heads 1, 2, 3, 4 are arranged in the transport direction F is not limited to that shown in FIG.
The areas occupied by the nozzle rows 11, 12, 13, and 14 along the transport direction F by the line heads 1, 2, 3, and 4 have the same dimensions in this embodiment. And the area | region which each nozzle row 11, 12, 13, 14 occupies is a pair of conveyance rollers 15 and 16, a pair of conveyance rollers 17 and 18, and a pair of conveyance rollers 19 which adjoin the conveyance direction F, respectively. 20, located approximately in the middle between the centers of the pair of transport rollers 21 and 22. As will be described later, it is needless to say that the area occupied by the nozzle rows 11, 12, 13, and 14 is not limited to the structure located substantially at the center.

  The exhaust ports 5, 6, 7, 8, and 9 are exhaust units 23.24.25. Such as an exhaust fan that exhausts the vapor or hot air generated by drying the ink by the heat of the heating roller 10. 26.27 suction port.

  Each of the transport rollers 15, 16, 17, 18, 19, 20, 21, and 22 is provided at a position that does not face the area occupied by the nozzle rows 11, 12, 13, and 14. Specifically, the contacts 28, 29, 30, 31, 32, 33, 34 between the transport rollers 15, 16, 17, 18, 19, 20, 21, 22 and the recording material P that also serve as the heating roller 10, 35 is a range deviating from the area occupied by the nozzle rows 11, 12, 13, 14 and is provided at a position facing the exhaust ports 5, 6, 7, 8, 9. Each of the conveyance rollers can be driven and rotated, and is appropriately set in combination with other components constituting the conveyance mechanism.

  Since the heat of the heating roller 10 is transmitted to the recording material P from the contacts 28, 29, 30, 31, 32, 33, 34, 35, the contacts 28, 29, 30, 31, 32, 33, 34, 35 are provided. Is configured so as to be located outside the area occupied by the nozzle rows 11, 12, 13, 14.

In this embodiment, the contacts 28, 29, 30, 31, 32, 33, 34, 35 are provided at positions facing the exhaust ports 5, 6, 7, 8, 9 from the front. With this arrangement, the heat is directly sucked into the exhaust ports 5, 6, 7, 8, and 9 from the front, so that heat can be effectively removed.
The contacts 28, 29, 30, 31, 32, 33, 34, and 35 are not located in front of the exhaust ports 5, 6, 7, 8, and 9, but are inclined slightly from the front. Even if it is a position, it should just be remove | deviated from the area | region which the said nozzle row 11, 12, 13, 14 occupies.

  In the present embodiment, a pair of transport rollers 15 adjacent to each other in the transport direction F with the areas occupied by the nozzle rows 11, 12, 13, 14 of the respective line heads 1, 2, 3, 4 in between. 16, a pair of transport rollers 17 and 18, a pair of transport rollers 19 and 20, and a pair of transport rollers 21 and 22, the nozzle rows 11, 12, 13, 14 of the recording material P to be transported. The interval for is specified.

That is, between the pair of transport rollers 15 and 16, between the pair of transport rollers 17 and 18, between the pair of transport rollers 19 and 20, and between the pair of transport rollers 21 and 22, respectively. The conveying rollers 15, 16, and 17 are arranged so that the distance between the recording material P and the nozzle rows 11, 12, 13, and 14 is defined by the material P being stretched over in a tensioned state. , 18, 19, 20, 21, 22 relative to the nozzle rows 11, 12, 13, 14 are set.
The recording material P is bridged on the front surface facing the nozzle rows 11, 12, 13, and 14, but there is no heating unit.

  In the present embodiment, at least a part of the heating roller 10 includes a drying roller 10A located on the upstream side and a preheating roller 10B located on the downstream side. Specifically, the transport rollers 16, 18, and 20 are drying rollers 10A, and the transport rollers 17, 19, and 21 are preheating rollers 10B. Further, the transport roller 15 is a preheating roller 10A, and the transport roller 22 is a drying roller 10A.

The temperature suitable for drying the ink ejected onto the recording material P and the temperature suitable for preheating the recording material P before ejecting the ink onto the recording material P depend on the type of ink. May be different.
In the present embodiment, since the drying roller 10A and the preheating roller 10B are provided, it is possible to easily cope with cases where the respective temperatures are different. That is, a temperature suitable for drying the ink ejected onto the recording material P depending on the type of ink, and a temperature suitable for preheating the recording material P before ejecting the ink onto the recording material P. It is possible to easily cope with cases where the values are different.

  In this embodiment, the heating roller 10 generates heat by induction heating. As the heating roller 10 that generates heat by induction heating, for example, a super heat roll (SHR) manufactured by Hydec Co., Ltd. can be used.

According to this aspect, an eddy current flows through the roller portion made of the conductive material of the heating roller 10 by induction heating, and Joule heat is generated by the eddy current and the electrical resistance of the roller portion, whereby the heating roller 10 Self-heats.
Accordingly, only the portion through which the eddy current flows is self-heated, so that direct heating is performed and local heating is performed, and the heating efficiency can be easily improved as compared with indirect heating by the heater.
In addition, since there is no heat source such as a heater, the surroundings do not have to be high temperature, which is more effective. Moreover, since it is direct heating, rapid heating is possible, and the start-up when the heating roller is turned on can be improved.

  Further, only the portion necessary for drying the ink ejected onto the recording material P can be set to a necessary high temperature, and this can be realized while suppressing the temperature rise of other surrounding members. As a result, the recording material P can be dried at high speed while being conveyed at high speed. This high speed drying can improve the recording quality.

  In the above description, the structure of the heating unit of the heating roller 10 is an induction heating type, but it is needless to say that the structure is not limited to this. Water heated by an external temperature controller, or a heating medium circulating type that heats oil through a spiral groove formed inside the roller, or a heater heating type that heats and heats the heater inside the roller center, etc. Other known structures can be employed.

Next, the operation of the first embodiment will be described.
According to the present embodiment, the transport rollers 15, 16, 17, 18, 19, 20, 21, 22 that also serve as the heating roller 10 are located facing the exhaust ports 5, 6, 7, 8, 9, and the line Since it does not face the area occupied by the nozzle rows 11, 12, 13, 14 of the heads 1, 2, 3, 4, the influence of the heat of the heating roller 10 transmitted when the ink is dried is affected by the nozzle rows 11, 12. , 13, 14 are difficult to receive. Therefore, ink ejection defects can be reduced.

[Example 2] (FIGS. 2 and 3)
A recording apparatus according to the second embodiment of the present invention will be described in detail with reference to FIG.
The recording apparatus according to the second embodiment is located adjacent to the upstream side of the exhaust port 5 located in the uppermost stream in the transport direction F among the exhaust ports 5, 6, 7, 8, and 9, and the recording material A pretreatment liquid unit 36 for attaching the pretreatment liquid to P is provided. The temperature of the heating roller 37 first positioned on the downstream side of the pretreatment liquid unit 36 is set to be higher than the temperatures of the other heating rollers 10 positioned downstream in the transport direction F.
Since other configurations are the same as those of the first embodiment shown in FIG. 1, the same reference numerals are given to the same portions, and the description thereof is omitted.

In the case of forming a recorded matter (image) by ejecting ink onto a recording material P such as a fabric, the ink is ejected after a pretreatment liquid is adhered in order to ensure recording quality.
According to this embodiment, the pretreatment liquid can be attached by the pretreatment liquid unit 36 as part of the recording operation in the recording apparatus.
Further, the pretreatment liquid needs to be dried well in order to reduce bleeding before ink discharge. According to the present embodiment, the temperature of the heating roller 37 for drying the pretreatment liquid is set higher than the temperatures of the other heating rollers. Thereby, a necessary dry state can be realized stably.

  Further, as shown in FIG. 3, in this embodiment, the conveyance path of the recording material P is configured so that the direction changes depending on the position of the heating roller 37. Thereby, the recording material P to which the pretreatment liquid is attached by the pretreatment liquid unit 36 comes into surface contact with the heating roller 37 instead of line contact. Since the contact area with the heating roller 37 is increased by this surface contact, drying of the pretreatment liquid can be further promoted. In the case of the structure of FIG. 3, since the drying power of the heating roller is increased by surface contact, the temperature of the heating roller 37 does not necessarily have to be higher than the temperatures of the other heating rollers.

Furthermore, in this embodiment, the pretreatment liquid unit 36 includes a line head 39 for discharging the pretreatment liquid from the nozzle row 38.
Accordingly, since the pretreatment liquid is ejected from the nozzle row 38 of the line head 39 in an ink jet manner, the pretreatment liquid can be attached only to a necessary place in accordance with the shape of the recorded matter (image). Therefore, since the amount of the pretreatment liquid attached decreases, the heat energy necessary for drying the pretreatment liquid can also be reduced. Accordingly, the nozzle row 38 is less likely to be affected by the heat of the heating roller 37 transmitted when the ink is dried. Therefore, defective discharge of the pretreatment liquid can be reduced.

Next, as described above, the recording material P includes a pair of transport rollers 15 and 16, a pair of transport rollers 17 and 18, a pair of transport rollers 19 and 20, and a pair of transport rollers 15 and 16, respectively. It is bridged between the transfer rollers 21 and 22 in a tensioned state.
In this bridging structure, the recording material P is not constrained in the central portion between the pair of transport rollers (between 15 and 16 and the like), so that it is easy to shake. Therefore, the arrangement of the nozzle rows 11, 12, 13, and 14 with respect to the pair of transport rollers (for example, 15 and 16) is more than the nozzle rows 11, 12, 13, and 14 positioned facing the central portion. It is preferable to be positioned close to one of the conveying rollers because it is less susceptible to the shake. In addition, it is preferable that the pair of transport rollers be positioned closer to the downstream transport roller in the transport direction from the viewpoint of reducing the influence of heat on the nozzle rows.
In this embodiment, from this point of view, as shown in FIG. 2, the arrangement of the nozzle rows 11, 12, 13, and 14 with respect to the pair of transport rollers (for example, 15 and 16) is arranged on the downstream side in the transport direction. Close to the transport roller (16). As a result, the influence of heat on the nozzle rows 11, 12, 13, and 14 is reduced.

Example 3 (FIG. 4)
A recording apparatus according to the third embodiment of the present invention will be described in detail with reference to FIG.
The recording apparatus according to the third embodiment is a double-sided recording apparatus, which discharges ink onto one surface 41 of the recording material P being conveyed and dries the ink, and the recording target. A second recording / drying execution unit 44 that discharges ink to the other surface 43 of the material P and dries the ink, and a first recording / drying execution unit 42 and a second recording / drying execution unit 44 in the transport path. A first reversing roller 45 positioned in between, and a second reversing roller 46 positioned on the downstream side of the transport path with respect to the second recording execution unit 44 are provided.

The first reverse roller 45 and the second reverse roller 46 are positioned below the first recording / drying execution unit 42 and the second recording / drying execution unit 44.
Since the first reversing roller 45 and the second reversing roller 46 required in the double-sided recording apparatus are positioned below the double-sided recording apparatus, the weight balance of the entire double-sided recording apparatus is stabilized.

Further, the first recording / drying execution unit 42 and the second recording / drying execution unit 44 include the line heads 1, 2, 3, 4 and the exhaust ports 5, 6, 7, 8 described in the first or second embodiment. , 9, transport rollers 15, 16, 17, 18, 19, 20, 21, 22, 37 that also serve as the heating roller 10, and a pretreatment liquid unit 36.
The pretreatment liquid unit 36 includes a line head 39 having an ink jet type nozzle row 38. The other line heads 1, 2, 3, and 4 are provided side by side in series. In FIG. 4, the nozzle rows 11, 12, 13, 14, and 38 are not shown.

In this embodiment, the first reversing roller 45 and the second reversing roller 46 generate heat by high frequency induction heating. In FIG. 3, reference numeral 48 denotes an induction coil for high-frequency induction heating. As a result, the first reversing roller 45 and the second reversing roller 46 generate heat by induction heating, and are used as the drying roller (heating roller) 47 while reversing the recording material P. Therefore, the amount of heat for drying by the first recording drying execution unit 42 can be reduced, and the influence of heat on the nozzle rows 11, 12, 13, and 14 can be reduced accordingly. Therefore, ink ejection defects can be reduced. In FIG. 4, the code | symbol 53 is an exhaust part. The exhaust unit 53 sucks and exhausts steam and hot air generated by drying by the drying roller 47.
Further, since heat is generated by high frequency induction heating, the first reversing roller 45 and the second reversing roller 46 that also serve as the drying roller 47 can obtain the same effects as the effects described in the description of the first embodiment. .

A cooling roller 49 that cools in contact with the recording material P between the first reversing roller 45 and the nozzle row 38 of the line head 39 positioned at the uppermost stream of the second recording drying execution unit 44 in the transport path. Is provided.
As a result, the recording material P that has become hot due to the heat drying by the first reversing roller 45 (drying roller 47) is cooled by passing the cooling roller 49, and the next second recording drying execution unit 44 performs the cooling. It can be lowered to a temperature suitable for recording.

  The pretreatment liquid unit 36 constituting the first recording / drying execution unit 42 includes a preheating roller 50 and an exhaust port 51. The pretreatment liquid unit 36 constituting the second recording / drying execution unit 44 does not include a preheating roller and an exhaust port. Since the recording material P is fed at a high temperature by heat drying with the first reversing roller 45 (drying roller 47), the preheating roller can be made unnecessary by adjusting the cooling by the cooling roller 49.

In this embodiment, a heat shield member 52 is provided above the first reversing roller 45 and the second reversing roller 46 and below the first recording drying execution unit 42 and the second recording drying execution unit 44. It has been.
As a result, the convection of heat generated by the drying of the ink by the first reverse roller 45 and the second reverse roller 46 also serving as the drying roller 47 located below the apparatus is generated in the upper nozzle rows 11, 12, 13, and 14. Reaching can be blocked by the heat shield member 52 and suppressed.
Here, examples of the heat shield member 52 include a member having good heat absorbability, such as a copper plate, and a shield structure that structurally isolates the heat flow.

1-4 line head, 5-9 exhaust port, 11-14 nozzle row,
15-22 roller for transport, 23-27 exhaust part, 28-35 contact point,
36 Pretreatment liquid unit, 37 heating roller, 38 nozzle row,
39 Line head, 40 Feed roller, 41 One side,
42 first recording drying execution unit, 43 other side, 44 second recording drying execution unit,
45 1st reversing roller, 46 2nd reversing roller,
47 Drying roller (heating roller), 48 induction coil, 49 cooling roller,
50 Preheating roller, 51 Exhaust port, 52 Heat shield member, 53 Exhaust part,
F Direction of transport, P Recording material

Claims (10)

A plurality of line heads spaced apart in the conveyance direction of the recording material;
Exhaust ports provided on both sides in the transport direction of the area occupied by each nozzle row of each line head;
A plurality of transport rollers provided at positions facing each of the exhaust ports and rotating in contact with the recording material;
The recording apparatus according to claim 1, wherein the conveyance roller includes a heating unit that applies heat to the recording material and serves also as a heating roller. The recording apparatus according to claim 1,
A pair of the transport rollers adjacent to each other in the transport direction with an area occupied by each nozzle array of each line head defining an interval of the recording material to be transported with respect to the nozzle array, Recording device. The recording apparatus according to claim 1 or 2,
At least a part of the heating roller is
A drying roller located upstream,
A recording apparatus comprising: a preheating roller located on the downstream side. The recording apparatus according to any one of claims 1 to 3,
The recording apparatus, wherein the heating roller generates heat by induction heating. In the recording device according to any one of claims 1 to 4,
Located adjacent to the upstream side of the exhaust port located in the uppermost stream in the transport direction, and includes a pretreatment liquid unit that attaches a pretreatment liquid to the recording material,
The recording apparatus according to claim 1, wherein a temperature of a heating roller first positioned on the downstream side of the pretreatment liquid unit is set higher than temperatures of other heating rollers positioned downstream in the transport direction. The recording apparatus according to claim 5, wherein
The pretreatment liquid unit is
A recording apparatus comprising a line head for discharging a pretreatment liquid from a nozzle. A first recording / drying execution unit that discharges ink onto one surface of the recording material to be conveyed and dries the ink;
A second recording drying execution unit for discharging ink to the other surface of the recording material and drying the ink;
A first reversing roller positioned between the first recording drying execution unit and the second recording drying execution unit in the conveyance path;
A second reversing roller positioned on the downstream side of the transport path with respect to the second recording execution unit,
The first reversing roller and the second reversing roller are positioned below the first recording drying execution unit and the second recording drying execution unit,
The first recording / drying execution unit and the second recording / drying execution unit include the line head, the exhaust port, the conveyance roller that also serves as the heating roller, and the pretreatment liquid unit according to any one of claims 1 to 6. A recording apparatus, comprising: The recording apparatus according to claim 7, wherein
The recording apparatus, wherein the first reversing roller and the second reversing roller generate heat by induction heating. The recording apparatus according to claim 8, wherein
A recording apparatus, wherein a heat shielding member is provided above the first reversing roller and the second reversing roller and below the first recording drying execution unit and the second recording drying execution unit. The recording apparatus according to claim 8 or 9,
A cooling roller that cools in contact with the recording material is provided between the first reversing roller and the nozzle row located at the uppermost stream of the second recording drying execution unit in the conveyance path. A recording device.

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