JP2011126153A - Cooling device and fluid jetting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device which can suppress a temperature rise accompanied by the reception of light, and to provide a fluid jetting apparatus equipped with the cooling device. <P>SOLUTION: The cooling device 16 equipped in a printer includes a light receiving roller 31 which is arranged at a position opposed to a light irradiation device which irradiates light for promoting the curing of an ink adhering to paper S. When a part of the light receiving roller 31 is disposed at a light reception position where the light is received, other parts are arranged at non-light reception positions separated from the light reception position. The light receiving roller rotates so that the part arranged at the light reception position and the part arranged at the non light reception position are alternated with each other at specified timing. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cooling device and a fluid ejection device including the cooling device.

  Conventionally, a fluid ejecting apparatus such as an ink jet printer includes a fluid ejecting head that ejects a so-called ultraviolet curable ink, a light irradiating apparatus that irradiates light including ultraviolet light to promote curing of the landed ink, and light irradiation. There was a thing provided with the cooling device arranged in the position which counters a device. (For example, patent document 1).

  The cooling device provided in the ink jet printer (image recording apparatus) of Patent Document 1 includes fins for heat dissipation and a cooling fan for cooling the fins. And the irradiated platen was cooled by arrange | positioning a fin on the back side of the irradiated platen arrange | positioned in the position facing a light irradiation apparatus.

JP 2005-96374 A

  By the way, in the printer of patent document 1, since the irradiated platen and fin which receive light irradiation become quite high temperature, there exists a possibility that the heat | fever of a cooling device may have a bad influence on the medium (printing paper) and apparatus located in the periphery. was there.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a cooling device capable of suppressing a temperature rise accompanying light reception and a fluid ejecting apparatus including the cooling device.

  In order to achieve the above object, the cooling device of the present invention is disposed at a position facing a light irradiation device that irradiates light that promotes hardening of a fluid adhering to a medium, and a part of the light receiving position that receives the light is disposed. When the heat dissipating member is disposed, the heat dissipating member is disposed at a non-light receiving position that is separated from the light receiving position when the other part is disposed, and the heat dissipating member includes the portion disposed at the light receiving position and the non light receiving position It operates so that the part arranged in the can be replaced.

  According to this configuration, when a part of the heat dissipating member is disposed at the light receiving position for receiving light, the other part is disposed at the non-light receiving position separated from the light receiving position, and is disposed at the light receiving position at a specified timing. Since the portion and the portion arranged at the non-light receiving position are switched, it is possible to secure a heat radiation time at the non-light receiving position and to suppress a temperature rise due to light reception.

In the cooling device of the present invention, the heat radiating member is a light receiving roller, and the light receiving roller is arranged so that an axis is along the transport direction of the medium.
According to this configuration, since the heat dissipating member is a light receiving roller, the portion disposed at the light receiving position and the portion disposed at the non-light receiving position can be efficiently exchanged with rotation. In addition, since the light receiving roller is arranged so that the axis line is along the conveyance direction of the medium, it is possible to suppress the entrainment of the medium.

  The cooling device according to the present invention further includes a suction mechanism that sucks air in the vicinity of the light receiving position, and the suction mechanism is disposed near the end of the medium located between the light irradiation device and the heat radiating member. Suction more strongly than the center.

  According to this configuration, the suction mechanism sucks the vicinity of the end of the medium located between the light irradiation device and the heat radiating member more strongly than the central portion of the medium, thereby suppressing contact of the medium with the light irradiation device. Can do.

In the cooling device of the present invention, the heat radiating member is provided with a plurality of vent holes, and the opening area of the vent holes is larger on the upstream side than on the downstream side in the conveyance direction of the medium.
According to this configuration, since the heat radiating member is provided with the plurality of air holes, air near the light receiving position can be sucked through the air holes. Further, since the opening area of the vent hole is larger on the upstream side than the downstream side in the medium transport direction, the suction amount on the upstream side in the transport direction can be increased. Thereby, floating substances, such as paper dust and ink mist which float in the air, can be sucked efficiently, and blockage of the air holes due to adhesion of the floating substances can be suppressed.

  The cooling device according to the present invention includes a fluid ejecting head that ejects a fluid onto a medium, a transport path of the medium, and a cantilever support with the fluid ejecting head facing the transport path on one side in the width direction of the transport path. And a light irradiating device for irradiating light that promotes hardening of the fluid attached to the medium. The heat radiating member is provided with a plurality of vent holes, The opening area is larger on the other side than the one side in the width direction of the transport path.

  According to this configuration, since the fluid ejecting head is cantilevered by the support plate, in the width direction of the transport path, the air flow rate and flow velocity are larger on the other side than the one side closer to the support plate. There is a big tendency. And since the opening area of a ventilation hole is larger on the other side than the one side in the width direction of a conveyance path, a floating substance can be attracted | sucked efficiently.

  In order to achieve the above object, a fluid ejecting apparatus of the present invention includes a fluid ejecting head that ejects fluid onto a medium, a light irradiating apparatus that irradiates light that promotes curing of the fluid attached to the medium, and the cooling apparatus. With.

  According to this structure, the same effect as the said cooling device can be obtained.

1 is a front view illustrating a schematic configuration of a printer according to a first embodiment. FIG. 2 is an end view taken along line AA in FIG. 1. The side view which shows schematic structure of the cooling device of 1st Embodiment. FIG. 4 is a cross-sectional view taken along line BB in FIG. 3. Sectional drawing for demonstrating schematic structure of the cooling device of 2nd Embodiment. FIG. 6 is a sectional view taken along line CC in FIG. 5. Sectional drawing for demonstrating schematic structure of the cooling device of 3rd Embodiment. The DD sectional view taken on the line in FIG. Sectional drawing which shows schematic structure of the cooling device of 4th Embodiment. FIG. 10 is a cross-sectional view taken along line EE in FIG. 9. Sectional drawing for demonstrating schematic structure of the cooling device of 5th Embodiment.

(First embodiment)
First, an embodiment in which the present invention is embodied in an ink jet printer (hereinafter simply referred to as “printer”) which is a kind of fluid ejecting apparatus will be described with reference to FIGS. In the following description, when referring to “front-rear direction”, “left-right direction”, and “up-down direction”, the direction indicated by an arrow in each figure is used as a reference.

  The printer 11 shown in FIG. 1 includes a support plate 12, a transport mechanism 13, a head unit 14, a light irradiation device 15, and a cooling device 16. The transport mechanism 13 includes a platen drum 20, a rotation shaft 21, a paper feed roller 22, a first roller 23, a second roller 24, and a take-up roller 25 that constitute a transport path. The paper S as a medium is a long paper, is unwound from the paper supply roller 22, is wound around the first roller 23, the platen drum 20, and the second roller 24, and is taken up by the take-up roller 25.

  As shown in FIG. 2, the platen drum 20 has a cylindrical shape whose axis extends along the width direction Y that coincides with the front-rear direction, and can be integrally rotated with a rotary shaft 21 that rotates in accordance with driving of a conveyance motor (not shown). It is supported by. The rotating shaft 21 is cantilevered by the support plate 12. The paper S is wound around the platen drum 20 with a predetermined tension, and is conveyed along with the rotation of the paper feed roller 22, the platen drum 20, and the take-up roller 25.

  As shown in FIG. 1, a plurality (six in this embodiment) of head units 14 are arranged so as to surround the platen drum 20. The number of head units 14 can be set arbitrarily. Each head unit 14 includes a fluid ejecting head 26 that ejects ultraviolet curable ink (hereinafter simply referred to as “ink”) as a fluid that cures by reacting with ultraviolet rays to a portion facing the platen drum 20. I have.

  That is, the support plate 12 has a mode in which the fluid ejecting head 26 is cantilevered on the one side (rear side) in the width direction Y via the head unit 14 so as to face the platen drum 20. Then, the sheet S having the back surface wound around the platen drum 20 receives the ink ejected from the fluid ejecting head 26 on the front surface side, and the second roller 24 moves along the transport direction X indicated by an arrow in FIG. It is conveyed toward.

  The light irradiation device 15 is disposed on the downstream side of the head unit 14 in the transport direction X so as to face the surface of the paper S that receives ink, and accelerates the curing of the ink In (see FIG. 4) attached to the paper S. Irradiate with light. The light irradiation device 15 includes a light source 27 that emits light including ultraviolet rays, and a reflecting mirror 28 that adjusts the light irradiation direction so that light emitted from the light source 27 is emitted toward the surface of the paper S. ing. For example, a metal halide lamp is used as the light source 27, and light can be applied to a width equal to or larger than the maximum width of the paper S used in the printer 11.

  The cooling device 16 is disposed on the back side of the paper S so as to face the light irradiation device 15 via the paper S in the thickness direction Z (see FIG. 4) of the paper S. The light irradiation device 15 and the cooling device 16 are fixed to the support plate 12 with a predetermined separation distance so as not to contact the paper S.

  As shown in FIG. 3, the cooling device 16 includes a plurality of heat dissipation mechanisms 30. In addition, the installation number of the thermal radiation mechanism 30 can be set arbitrarily. Each heat dissipating mechanism 30 includes a light receiving roller 31 as a heat dissipating member disposed at a position facing the light irradiation device 15, a suction fan 32 constituting a suction mechanism, and a motor that is a drive source for rotating the light receiving roller 31. 33, and are arranged in parallel along the width direction Y orthogonal to the transport direction X.

  The light receiving roller 31 is arranged such that its axis is along the transport direction X of the paper S. The suction fan 32 is provided on the upstream side in the transport direction X of the light receiving roller 31, while the motor 33 is provided on the downstream side in the transport direction X of the light receiving roller 31. The light receiving roller 31 is made of a material having high thermal conductivity, and a plurality of air holes 31a are provided on the surface thereof. The opening area of the vent hole 31a increases toward the upstream side in the transport direction X.

  As shown in FIG. 4, a cavity communicating with the vent hole 31 a is provided inside the light receiving roller 31, and the suction fan 32 sucks air in the cavity of the light receiving roller 31. The light receiving roller 31 is laid in a range wider than the width of the paper S in the width direction Y. The suction force of the suction fan 32 of each heat dissipation mechanism 30 can be adjusted individually. The suction fan 32 of each heat dissipation mechanism 30 sucks the vicinity of the end of the sheet S positioned between the light irradiation device 15 and the light receiving roller 31 in the width direction Y more strongly than the center of the sheet S. The suction force is adjusted.

Next, the operation of the cooling device 16 will be described.
When the paper S is conveyed from the paper supply roller 22 toward the take-up roller 25, ink is sequentially ejected from each fluid ejecting head 26 onto the surface of the paper S wound around the platen drum 20. Thereafter, the sheet S transported in the transport direction X is irradiated with light at the light receiving position where the light irradiating device 15 receives light, and drying of the attached ink In is promoted. At this time, since the light emitted from the light source 27 such as a metal halide lamp includes components other than ultraviolet rays, the temperature of the sheet S and the cooling device 16 that are irradiated with light in addition to the light irradiation device 15 is increased. End up.

  Therefore, the motor 33 of each heat dissipating mechanism 30 provided in the cooling device 16 is driven to rotate the light receiving roller 31. Then, when a part of the light receiving roller 31 is arranged at the light receiving position for receiving the light of the light irradiation device 15, the other part is arranged at the non-light receiving position separated from the light receiving position. The operation (rotation) is performed so that the portion arranged at the light receiving position and the portion arranged at the non-light receiving position are interchanged at the timing. That is, the light receiving roller 31 functions as a light receiving member at the light receiving position, and functions as a heat radiating member that radiates heat generated by light reception.

  Therefore, if the portion of the light receiving position of the light receiving roller 31 where the temperature has increased moves to the back side where the light receiving position becomes the non-light receiving position, the heat radiation time is ensured before reaching the light receiving position again. Then, as the light receiving roller 31 rotates, the portions where the temperature decreases due to heat radiation are sequentially arranged at the light receiving position, so that the temperature rise of the light receiving roller 31 due to light reception is suppressed.

  When the suction fan 32 of each heat dissipation mechanism 30 is driven, air near the light receiving position is sucked through the vent hole 31a. Then, the sucked air flows through the cavity and is exhausted through an exhaust duct (not shown) while taking heat of the light irradiation device 15, the sheet S, and the light receiving roller 31. That is, since the generated heat is exhausted, the light irradiation device 15, the sheet S, and the light receiving roller 31 are cooled. In particular, when the width of the sheet S is narrow, the light receiving roller 31 directly receives light without the sheet S interposed therebetween, but the suction fan 32 strongly near the end of the sheet S in the width direction Y. Since the suction force is adjusted so as to suck, the light receiving roller 31 having a large temperature rise due to light reception is efficiently cooled.

According to the first embodiment described above, the following effects can be obtained.
(1) When a part of the light receiving roller 31 is disposed at a light receiving position for receiving light, the other part is disposed at a non-light receiving position separated from the light receiving position, and a part disposed at the light receiving position at a prescribed timing; Since it rotates so that the part arrange | positioned in a non-light-receiving position may replace | exchange, the heat dissipation time in a non-light-receiving position can be ensured, and the temperature rise accompanying light reception can be suppressed. Thereby, the influence with respect to the peripheral apparatus and the paper S accompanying heat generation can be suppressed.

  (2) By the rotation of the light receiving roller 31, the portion arranged at the light receiving position and the portion arranged at the non-light receiving position can be efficiently exchanged. In addition, since the light receiving roller 31 is arranged so that the axis line is along the transport direction X of the paper S, the entrainment of the paper S can be suppressed.

  (3) Since the suction fan 32 sucks the vicinity of the edge of the paper S positioned between the light irradiation device 15 and the light receiving roller 31 more strongly than the central portion of the paper S, the contact of the paper S with the light irradiation device 15 Can be suppressed.

  (4) Since the light receiving roller 31 is provided with a plurality of air holes 31a, air near the light receiving position can be sucked through the air holes 31a. Further, the suction fan 32 is provided on the upstream side in the transport direction X, and the opening area of the vent hole 31a is larger on the upstream side in the transport direction X of the paper S than on the downstream side. The amount can be increased. Thereby, floating substances, such as paper dust and ink mist floating in the air, can be sucked efficiently, and blockage of the air holes 31a due to adhesion of floating substances can be suppressed.

  (5) By using the light receiving roller 31 as the heat radiating member, heat can be efficiently radiated in a small space. Further, by arranging the plurality of light receiving rollers 31 along the width direction Y, the cooling range and suction force in the width direction Y can be arbitrarily adjusted according to the width of the paper S.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. Although the second embodiment is different from the first embodiment in that the configuration of the cooling device 16 is changed, the other configurations are the same, and thus the differences will be mainly described below. .

  As shown in FIG. 5, the cooling device 16 of this embodiment includes a heat dissipation mechanism 40, a housing 41, and a cooling fan 42 that constitutes a suction mechanism. As shown in FIG. 6, the heat dissipation mechanism 40 includes an endless light receiving belt 43 as a heat dissipation member, a drive roller 44, a driven roller 45, a motor 46 that is a drive source for rotating the drive roller 44, and a suction mechanism. A suction fan 47 is provided.

  The light receiving belt 43, the driving roller 44, and the driven roller 45 are all made of a material having high thermal conductivity, and the light receiving belt 43 is wound around the driving roller 44 and the driven roller 45. The driving roller 44 and the driven roller 45 are arranged so that the axes thereof are along the transport direction X of the paper S, and the driving roller 44 and the driven roller 45 are provided in the vicinity of the end of the paper S in the width direction Y. .

  The suction fan 47 is provided on the upstream side of the driving roller 44 and the driven roller 45 in the transport direction X. The light receiving belt 43 is provided with a plurality of ventilation holes 43a, and the driving roller 44 and the driven roller 45 are also provided with a plurality of ventilation holes (not shown). The vent holes of the driving roller 44 and the driven roller 45 are provided at positions corresponding to the light receiving belt 43, and the vent holes of the driving roller 44 and the driven roller 45 and the vent hole 43a of the light receiving belt 43 are upstream in the transport direction X. The opening area becomes larger.

  Cavities communicating with the respective air holes are provided inside the driving roller 44 and the driven roller 45, and each suction fan 47 sucks air in the cavities of the driving roller 44 and the driven roller 45.

  The housing 41 is provided with an opening 41a (see FIG. 5) for exposing the light receiving belt 43, and the inside of the housing 41 is a suction chamber 41b. A part of the light receiving belt 43 exposed to the outside of the housing 41 through the opening 41a is disposed at a light receiving position for receiving the light of the light irradiation device 15, and the other part accommodated in the housing 41 is a light receiving position. It becomes the aspect arrange | positioned in the non-light-receiving position spaced apart.

  Therefore, as the motor 46 is driven and the driving roller 44 rotates, the light receiving belt 43 operates so that a portion disposed at the light receiving position and a portion disposed at the non-light receiving position are switched at a predetermined timing ( Move around). That is, the light receiving belt 43 functions as a light receiving member at the light receiving position, and functions as a heat radiating member that radiates heat generated by light reception.

  Accordingly, when the portion of the light receiving belt 43 that has risen in temperature at the light receiving position moves into the housing 41 that is the non-light receiving position, a heat radiation time is ensured before reaching the light receiving position again. As the light receiving belt 43 moves around, the portions where the temperature has decreased due to heat radiation are sequentially arranged at the light receiving position, so that the temperature rise of the light receiving belt 43 due to light reception is suppressed.

  When the suction fan 47 is driven, air in the light receiving position, particularly near the edge of the sheet S, is sucked through the vent holes of the driving roller 44 and the driven roller 45 and the vent hole 43a of the light receiving belt 43. When the cooling fan 42 is driven, air near the center of the light receiving position is sucked through the vent holes 43a of the light receiving belt 43 to cool the light irradiation device 15 and the paper S. Further, the air in the suction chamber 41 b is exhausted through an exhaust duct (not shown), so that the heat taken from the light irradiation device 15 and the paper S and the heat radiated from the light receiving belt 43 are exhausted outside the housing 41.

  Here, by adjusting the suction force by the suction fan 47 to be stronger than the suction force by the cooling fan 42, the vicinity of the end in the width direction Y of the light receiving belt 43 that directly receives light is efficiently cooled, The vicinity of the edge of the sheet S can be attracted to the cooling device 16 side.

According to the second embodiment described above, the following effects can be obtained in addition to the same effects as the above (1).
(6) By the circular movement of the light receiving belt 43, the portion disposed at the light receiving position and the portion disposed at the non-light receiving position can be efficiently exchanged. In addition, since the driving roller 44 and the driven roller 45 are arranged so that the axes thereof are along the transport direction X of the paper S, the entrainment of the paper S can be suppressed.

  (7) By adjusting the suction force of the suction fan 47 and the cooling fan 42, the vicinity of the edge of the paper S located between the light irradiation device 15 and the light receiving roller 31 is sucked more strongly than the central part of the paper S. Therefore, the contact of the paper S with the light irradiation device 15 can be suppressed.

  (8) Since the light receiving belt 43 is provided with a plurality of vent holes 43a, air near the light receiving position can be sucked through the vent holes 43a. The suction fan 47 is provided on the upstream side in the transport direction X, and the opening area of the vent hole 43a of the driving roller 44 and the driven roller 45 and the vent hole 43a of the light receiving belt 43 is upstream of the downstream side in the transport direction X of the paper S. Since the side is larger, the suction amount on the upstream side in the transport direction X can be increased. As a result, floating substances such as paper dust and ink mist floating in the air are efficiently sucked to prevent the floating substances from adhering to the cooling fan 42 and the air holes 31a from being blocked by the adhering floating substances. can do.

(9) By using the light receiving belt 43 as the heat dissipating member, the light receiving belt 43 can be efficiently moved by one motor 46.
(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIGS. Although the third embodiment is different from the first embodiment in that the configuration of the cooling device 16 is changed, the other configurations are the same, and thus the differences will be mainly described below. .

  As shown in FIG. 7, the cooling device 16 of this embodiment includes a heat dissipation mechanism 50, a housing 51, and two cooling fans 52 that constitute a suction mechanism. As shown in FIG. 8, the heat dissipation mechanism 50 includes a light receiving plate 53 as a heat dissipation member, a support member 54, and a motor 55 that is a drive source for rotating the light receiving plate 53.

  The light receiving plate 53 has a curved surface shape forming a part of a cylinder and is provided with a plurality of vent holes 53a. Note that the opening area of the vent hole 53a of the light receiving plate 53 is larger toward the upstream side in the transport direction X. The light receiving plate 53 is connected to a motor 55 via a support member 54, and rotates in the clockwise direction in FIG. 7 to a position indicated by a two-dot chain line as the motor 55 is driven in the forward direction. . The light receiving plate 53 rotates in the counterclockwise direction in FIG. 7 from the position indicated by the two-dot chain line to the position indicated by the solid line as the motor 55 is driven in the reverse direction.

  As shown in FIG. 8, the housing 51 is provided with an opening 51a for exposing the light receiving plate 53, and the inside of the housing 51 is a suction chamber 51b. Further, as shown in FIG. 9, the two cooling fans 52 are mounted on the wall surface facing the opening 51 a of the housing 51 so as to be aligned along the width direction Y and located near the end of the light receiving plate 53. ing.

  A part of the light receiving plate 53 exposed to the outside of the housing 51 through the opening 51a is disposed at a light receiving position for receiving the light of the light irradiation device 15, and the other part accommodated in the housing 51 is a light receiving position. It becomes the aspect arrange | positioned in the non-light-receiving position spaced apart. Accordingly, as the motor 55 is driven and the light receiving plate 53 is alternately rotated in both forward and reverse directions, the light receiving plate 53 is disposed at a light receiving position and at a non-light receiving position at a predetermined timing. And move (reciprocate) so that they are interchanged. That is, the light receiving plate 53 functions as a light receiving member at the light receiving position, and functions as a heat radiating member that radiates heat generated by light reception.

  Therefore, when the portion of the light receiving plate 53 that has risen in temperature at the light receiving position moves into the housing 51 that is the non-light receiving position, a heat radiation time is ensured before reaching the light receiving position again. Then, as the light receiving plate 53 is reciprocated, the portions where the temperature has decreased due to heat radiation are sequentially arranged at the light receiving position, so that the temperature rise of the light receiving plate 53 due to light reception is suppressed.

  When the cooling fan 52 is driven, air near the light receiving position is sucked through the vent hole 53a of the light receiving plate 53, and the light irradiation device 15 and the paper S are cooled. Further, the air in the suction chamber 51 b is exhausted through an exhaust duct (not shown), so that the heat taken from the light irradiation device 15 and the paper S and the heat radiated from the light receiving plate 53 are exhausted outside the housing 51. Here, since the cooling fan 52 is attached so as to be positioned in the vicinity of the end portion of the light receiving plate 53 along the width direction Y, the efficiency near the end portion in the width direction Y of the light receiving plate 53 to which direct light is irradiated is efficiently obtained. While cooling well, the vicinity of the edge of the sheet S can be sucked stronger than the center of the sheet S and attracted to the cooling device 16 side.

According to 3rd Embodiment described above, in addition to the effect similar to said (1), the following effects can be acquired.
(10) By disposing the cooling fan 52 in the vicinity of the end of the light receiving plate 53 along the width direction Y, the vicinity of the end of the paper S positioned between the light irradiation device 15 and the light receiving roller 31 Since the suction is stronger than the central portion, the contact of the paper S with the light irradiation device 15 can be suppressed.

  (11) Since the light receiving plate 53 is provided with a plurality of vent holes 53a, air near the light receiving position can be sucked through the vent holes 53a. Further, since the opening area of the vent hole 53a of the light receiving plate 53 is larger on the upstream side in the transport direction X of the paper S than on the downstream side, the suction amount on the upstream side in the transport direction X can be increased. Thereby, floating substances, such as paper dust and ink mist floating in the air, can be sucked efficiently, and blockage of the air holes 31a due to adhesion of floating substances can be suppressed.

(12) By using the light receiving plate 53 as the heat radiating member, the light receiving plate 53 can be efficiently moved by one motor 55.
(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIGS. Although the fourth embodiment is different from the first embodiment in that the configuration of the cooling device 16 is changed, the other configurations are common, and thus the differences will be mainly described below. .

  As shown in FIG. 9, the cooling device 16 of this embodiment includes a heat dissipation mechanism 60, a housing 61, and a cooling fan 62 that constitutes a suction mechanism. The heat radiating mechanism 60 includes a light receiving plate 63 as a heat radiating member, a rotating shaft 64 that supports the light receiving plate 63, and a motor 65 that is a drive source for rotating the rotating shaft 64 together with the light receiving plate 63.

  As shown in FIG. 10, the light receiving plate 63 is formed in a disc shape and has a plurality of vent holes 63a. In addition, the light receiving plate 63 includes a plurality of heat radiation fins 66 protruding toward the inside of the housing 61. The vent hole 63a has a larger opening area on the peripheral side than on the side of the rotary shaft 64 close to the center, and the radiating fins 66 are arranged radially about the rotary shaft 64. The light receiving plate 63 rotates with the driving of the motor 65.

  As shown in FIG. 9, the casing 61 is provided with a circular opening 61a for exposing the light receiving plate 63, and the inside of the casing 61 is a suction chamber 61b. The cooling fan 62 is disposed on the upstream side of the rotation shaft 64 and the motor 65 in the transport direction X, and is disposed so as to face the light irradiation device 15 via the paper S in the thickness direction Z of the paper S.

  Therefore, a portion of the light receiving plate 63 exposed to the outside of the housing 61 through the opening 61 a and the upstream side in the transport direction X disposed between the cooling fan 62 and the light irradiation device 15 is exposed to the light of the light irradiation device 15. It is arranged at a light receiving position for receiving light. Further, the other part of the light receiving plate 63 located on the downstream side of the rotation shaft 64 in the transport direction X is arranged at a non-light receiving position that is separated from the light receiving position. That is, the light receiving plate 63 functions as a light receiving member at the light receiving position, and functions as a heat radiating member that radiates heat generated by light reception.

  Therefore, as the motor 65 is driven and the rotating shaft 64 rotates, the light receiving plate 63 operates so that the portion disposed at the light receiving position and the portion disposed at the non-light receiving position are switched at a predetermined timing ( Rotate. As a result, when the portion of the light receiving plate 63 that has risen in temperature at the light receiving position moves to the non-light receiving position, a heat radiation time is ensured before reaching the light receiving position again. Then, as the light receiving plate 63 rotates, the portions where the temperature decreases due to heat radiation are sequentially arranged at the light receiving position, so that the temperature rise of the light receiving plate 63 due to light reception is suppressed.

  When the cooling fan 62 is driven, air near the light receiving position is sucked through the vent hole 63a of the light receiving plate 63, and the light irradiation device 15 and the paper S are cooled. Further, the air in the suction chamber 61 b is exhausted through an exhaust duct (not shown), so that the heat taken from the light irradiation device 15 and the paper S and the heat radiated from the light receiving plate 63 are exhausted outside the housing 61. And since the cooling fan 52 is provided in the position which opposes the light irradiation apparatus 15 in the thickness direction Z, the target (paper S and light receiving plate 63) arrange | positioned in the light irradiation apparatus 15 or a light-receiving position is efficiently used. Cool and suppress temperature rise.

According to the fourth embodiment described above, the following effects can be obtained in addition to the same effects as the above (1).
(13) Since the light receiving plate 63 is provided with a plurality of vent holes 63a, air near the light receiving position can be sucked through the vent holes 63a. The cooling fan 52 is provided at a position facing the light irradiation device 15, and the opening area of the vent hole 63 a of the light receiving plate 63 disposed at the light receiving position is higher in the transport direction X than the downstream side. Therefore, the amount of suction on the upstream side in the transport direction X can be increased. Thereby, floating substances, such as paper dust and ink mist floating in the air, can be sucked efficiently, and the blockage of the air holes 63a due to adhesion of the floating substances can be suppressed.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described with reference to FIG. Although the fifth embodiment is different from the first embodiment in that the configuration of the cooling device 16 is changed, the other configurations are common, and thus the differences will be mainly described below. .

  As shown in FIG. 11, the cooling device 16 of this embodiment includes a plurality of heat dissipation mechanisms 70. Each heat dissipation mechanism 70 is a drive source for rotating the light receiving rollers 31 and the light receiving rollers 71 to 75 as heat dissipation members disposed at positions facing the light irradiation device 15, the suction fan 32 constituting the suction mechanism, and the light receiving rollers 31. A motor 33 is provided, and is supported by the support plate 12 via a support member (not shown).

  The light receiving rollers 71 to 75 are arranged such that the axis thereof obliquely intersects the transport direction X and the width direction Y, and the lengths in the axis direction are different. The light receiving rollers 71 to 75 have ventilation holes 71 a to 75 a having different opening areas, respectively, and the opening areas of the ventilation holes 71 a to 75 a are larger in the transport direction X on the upstream side than on the downstream side. Moreover, in the width direction Y, it arrange | positions so that the other side (front side) may become larger than one side (rear side).

According to the fifth embodiment described above, in addition to the same effects as the above (1) and (4), the following effects can be obtained.
(14) Since the fluid ejecting head 26 and the platen drum 20 are cantilevered by the support plate 12, in the width direction Y, the other side (front side) opened from the one side (rear side) close to the support plate 12. ) Tends to have a higher air flow rate and flow velocity. And since the opening area of the vent holes 71a to 75a is larger in the width direction Y on the front side than on the rear side, it is possible to efficiently suck in floating substances.

In addition, you may change each said embodiment as follows.
-In 1st Embodiment, you may make it the opening area of the ventilation hole 31a of each light reception roller 31 become larger on the other side (front side) than one side (back side) in the width direction Y, and width In the direction Y, the suction force of the suction fan 32 on the other side (front side) may be larger than the one side (rear side). In the second embodiment, the suction force of the suction fan 47 on the other side (front side) may be larger than the suction force of the suction fan 47 on one side (rear side). In the third embodiment, the suction force of the cooling fan 52 on the other side (front side) may be larger than the suction force of the cooling fan 52 on one side (rear side). In the fourth embodiment, the cooling fan 62 may be disposed at a position on the other side (front side) in the width direction Y of the housing 61.

Also in each of these configurations, the same effect as in the above (14) can be obtained by increasing the suction amount on the other side (front side) in the width direction Y.
A partition wall may be provided in the light receiving roller 31 so as to generate a pressure difference in the cavity so that the suction force becomes stronger on the upstream side in the transport direction X.

The axis line of the light receiving roller 31 may be arranged along the width direction Y, and the axis line of the driving roller 44 and the driven roller 45 may be arranged along the width direction Y.
The medium that receives the fluid may be a film made of a material that does not allow ink to permeate, such as resin, metal, glass, or ceramic, or paper that penetrates ink using dietary fiber as a raw material.

The medium is not limited to a long sheet, and a sheet-like medium cut into a predetermined length such as a cut sheet may be used.
-You may comprise a conveyance path from the plate-shaped platen which has a planar support surface.

The light source 27 is not limited to a metal halide lamp, and any light source such as a mercury lamp can be used depending on the fluid to be cured.
In the above embodiment, the fluid ejecting apparatus is embodied as an ink jet printer, but a liquid ejecting apparatus that ejects or discharges liquid other than ink may be employed. The present invention can be used for various liquid ejecting apparatuses including a liquid ejecting head that ejects a minute amount of liquid droplets. In addition, a droplet means the state of the liquid discharged from the said liquid ejecting apparatus, and shall also include what pulls a tail in granular shape, tear shape, and thread shape. The liquid here may be any material that can be ejected by the liquid ejecting apparatus. For example, it may be in a state in which the substance is in a liquid phase, and a flow state such as a liquid material having high or low viscosity, sol, gel water, other solution, liquid resin, or liquid metal (metal melt). In addition, not only a liquid as one state of a substance but also a substance in which particles of a functional material made of a solid such as a pigment or a metal particle are dissolved, dispersed or mixed in a solvent. Further, a liquid ejecting apparatus that ejects a transparent resin liquid such as an ultraviolet curable resin onto a substrate may be employed to form a micro hemispherical lens (optical lens) used for an optical communication element or the like.

  DESCRIPTION OF SYMBOLS 11 ... Printer as fluid ejecting device, 12 ... Support plate, 15 ... Light irradiation device, 16 ... Cooling device, 20 ... Platen drum which comprises a conveyance path, 26 ... Fluid ejecting head, 31, 71-75 ... As a heat radiating member Light receiving rollers, 31a, 43a, 53a, 63a, 71a, 72a, 73a, 74a, 75a ... vent holes, 32, 47 ... suction fans constituting the suction mechanism, 43 ... light receiving belt as a heat radiating member, 52, 62 ... Cooling fan constituting suction mechanism, 53... Light receiving plate as heat radiating member, 63... Light receiving plate as heat radiating member, In... Ink as fluid adhering to medium, S. ... width direction.

Claims (6)

Arranged at a position opposite to the light irradiation device that irradiates light that promotes hardening of the fluid adhering to the medium, and when a part is disposed at the light receiving position that receives the light, the other part is separated from the light receiving position. A heat dissipating member arranged at a non-light receiving position is provided,
The cooling device, wherein the heat dissipating member operates so that a portion disposed at the light receiving position and a portion disposed at the non-light receiving position are switched at a prescribed timing. The heat dissipating member is a light receiving roller;
The cooling device according to claim 1, wherein the light receiving roller is disposed such that an axis thereof is along a conveyance direction of the medium. A suction mechanism for sucking air in the vicinity of the light receiving position;
3. The suction mechanism according to claim 1, wherein the suction mechanism sucks the vicinity of the end portion of the medium positioned between the light irradiation device and the heat radiating member more strongly than the center portion of the medium. Cooling system. The heat dissipation member is provided with a plurality of vent holes,
The cooling device according to claim 3, wherein an opening area of the vent hole is larger on the upstream side than on the downstream side in the conveyance direction of the medium. A fluid ejecting head that ejects a fluid onto a medium; a transport path of the medium; a support plate that cantilever-supports the fluid ejecting head so as to face the transport path on one side in the width direction of the transport path; and the medium A fluid ejection device having a light irradiation device for irradiating light that promotes the curing of the fluid attached to the fluid,
The heat dissipation member is provided with a plurality of vent holes,
The cooling device according to claim 3 or 4, wherein an opening area of the vent hole is larger on the other side than the one side in the width direction of the transport path. A fluid ejecting head that ejects fluid onto a medium;
A light irradiation device for irradiating light that promotes hardening of the fluid attached to the medium;
A fluid ejecting apparatus comprising: the cooling device according to any one of claims 1 to 5.

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