JP2018001448A - Irradiation unit and light irradiation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an irradiation unit including a reflection member which is easily manufactured and achieves high heat radiation performance, and to provide a light irradiation device.SOLUTION: An irradiation unit includes multiple light source units 531, each of which has a light source 525 and a reflection member 523 which reflects light of the light source 525 to condense a light to a light condensing point. The multiple light source units 531 are arranged side by side, and the reflection member 523 includes a base material 560 and a reflection plate 570 which is attached along a surface of the base material 560 and has a thin plate. The light source 525 is held on the base material 560 of the adjacent light source unit 531.SELECTED DRAWING: Figure 15

Description

  The present invention relates to an irradiation unit and a light irradiation apparatus.

  Conventionally, a light irradiation device in which a plurality of irradiation units are connected in a row is known (for example, see Patent Document 1). The irradiation unit of these light irradiation apparatuses includes a light source having a plurality of light emitting points, and a reflecting member that condenses light emitted from the light sources at a predetermined light condensing point.

Japanese Patent Laying-Open No. 2015-60744

By the way, as the reflecting member, there is known a reflecting member in which the surface of a metal such as aluminum is mirror-finished to form a reflecting surface. Thus, the reflecting member in which the reflecting surface is formed by mirror-finishing metal. However, there is a problem that the mirror finishing is troublesome and the manufacturing cost is high. Therefore, a reflection member in which aluminum is deposited on the surface of a resin material to form a reflection surface is widely used.
Since the light irradiation device is often used in a limited space, it is necessary to increase the amount of light by using a light emitting element with high illuminance in a small device. However, when light from a light-emitting element with high illuminance is irradiated onto a reflecting member made of a resin material, the resin temperature may exceed the heat resistance temperature in the irradiated portion, and the resin material may be deformed. As described above, when the resin material is deformed, there is a problem that wrinkles or peeling occurs in the reflective film deposited on the deformed portion.

  This invention is made | formed in view of the situation mentioned above, It aims at providing the irradiation unit provided with the reflective member which is easy to manufacture and has high heat dissipation, and a light irradiation apparatus.

  In order to achieve the above-described object, the present invention includes a light source unit having a light source and a reflecting member that reflects light from the light source and collects the light at a condensing point, and a plurality of the light source units are arranged side by side. The reflection member includes a base material and a thin plate-like reflection plate attached along the surface of the base material, and the light source is held by the base material of the adjacent light source unit. Features.

  In the above structure, the base material is formed of a metal material.

  In the above-described configuration, the base material is formed of a resin material.

  In the above-described configuration, the reflecting plate is formed to a thickness of 300 μm to 400 μm.

  Further, in the above-mentioned configuration, the base material is formed in a curved surface optically designed so that a surface facing the light source reflects light from the light source and condenses it at a condensing point. , And pasted along the curved surface.

  In the above-described configuration, the light source is a line light source in which a plurality of LEDs are arranged in a line, and the base material extends in the extending direction of the light source, and serves as the light source of the light source unit. One opposing side surface and the other side surface having a light source holding portion for holding the adjacent light source unit are formed in a continuous V shape, and the reflecting plate covers the base material from the vertex side of the V shape. And being attached to both surfaces of the one surface and the other surface.

  In addition, the present invention is a light irradiation apparatus including the irradiation unit having the above-described configuration, wherein a plurality of the irradiation units are arranged in a line, and a linear irradiation surface having a predetermined width is formed. .

  According to the present invention, the reflecting member includes a base material and a thin plate-like reflecting plate provided by being attached to the surface of the base material, so that the reflecting surface is formed by mirror finishing the metal. The reflector is easier to manufacture, and the reflector has a higher heat capacity than the deposited reflector, and can be transferred to the entire reflector to dissipate heat, thereby improving heat dissipation. Further, since the reflector can be easily replaced, maintenance is easy.

It is a schematic diagram of the sheet-fed printing press 1 provided with the light irradiation apparatus which concerns on embodiment of this invention. It is a perspective view which shows a light irradiation apparatus from the back side. It is a perspective view which shows a light irradiation apparatus from the front side. It is a disassembled perspective view which shows a light irradiation apparatus. It is a top view which shows a line light source main body. It is a disassembled perspective view which shows a line light source main body. It is a figure which shows the irradiation unit of 1st Embodiment, (A) is a perspective view, (B) is a perspective view of the state which removed the auxiliary reflector of (A). It is a front view which shows an irradiation unit. It is a disassembled perspective view which shows an irradiation unit. It is a figure which shows the optical path of an irradiation unit. It is a cross-sectional view which shows the irradiation unit of a modification. It is a front view which shows the irradiation unit of 2nd Embodiment. It is a top view which shows a light source. It is a disassembled perspective view which shows a light source module. It is a disassembled perspective view which shows a reflecting member. It is a disassembled perspective view which shows a center reflection member. It is a disassembled perspective view which shows the reflective member of a modification. It is a disassembled perspective view which shows the center reflective member of a modification.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic diagram of a sheet-fed printing press 1 including a light irradiation device 10 according to the present embodiment.
In this embodiment, the light irradiation device 10 is an ultraviolet irradiation device that irradiates ultraviolet rays from a light source, and an example in which the light irradiation device 10 is used as an ultraviolet curing device used in the sheet-fed printing press 1 will be described.
As shown in FIG. 1, the sheet-fed printing press 1 includes a paper feeding device 2, a printing unit 5, a coating unit 6, and a paper discharge device 7.
The sheet-fed printing machine 1 has a sheet feeding device 2, a sheet feeding table 3, and a printing unit 5, and feeds a sheet 4 prepared on the sheet feeding table 3 to the printing unit 5 by the sheet feeding device 2. In the printing unit 5, ink (activated energy ray curable ink) is printed on the sheet 4 with a desired pattern. The sheet-fed printing machine 1 has a coating unit 6, and a varnish (activated energy ray curable varnish) is printed on the sheet 4 by the coating unit 6. The sheet-fed printing machine 1 has a paper discharge device 7, and the sheet 4 on which ink and varnish are printed is sent from the coating unit 6 to the paper discharge device 7.

The paper discharge device 7 includes a paper discharge stand 8, a transport unit 9, and a light irradiation device 10. The paper discharge device 7 conveys the sheet 4 sent from the coating unit 6 to the paper discharge table 8 by the conveyance means 9. Further, the paper discharge device 7 irradiates the sheet 4 passing through the predetermined portion from the light irradiation device 10 provided at the predetermined portion of the transport path to the paper discharge tray 8 with ultraviolet rays. The ink and varnish printed on the substrate are UV cured.
The transport means 9 is wound around the sprocket 9a provided at the upper part of the paper discharge tray 8, the sprocket 9b provided at a position corresponding to the feed port of the sheet 4 of the coating unit 6, and the sprocket 9a, 9b. And a paper discharge chain 9c that circulates in conjunction with the rotation of 9a and 9b. The conveying means 9 conveys the sheet 4 sent from the coating unit 6 to the paper discharge table 8 by circulation of the paper discharge chain 9c.

The circulation path of the paper discharge chain 9c is a forward path in which the sheet 4 is moved from one sprocket 9a toward the other sprocket 9b, and a return path extending below the forward path with an equal interval between the forward path and the forward path. And a reverse path that is reversed at the sprockets 9a and 9b from the forward path to the return path or from the return path to the forward path.
As for the circulation path of the paper discharge chain 9c, the forward path and the return path are inclined with respect to the horizontal direction in some sections, and the forward path and the return path are extended in the horizontal direction in other sections.
A gripper 9d that holds the sheet 4 and conveys the sheet 4 in conjunction with the travel of the sheet discharge chain 9c is provided along the circulation path of the sheet discharge chain 9c. The sheet 4 is conveyed with the surface on which ink and varnish are printed facing the inside of the circulation path.

The light irradiation device 10 is disposed inside the circulation path of the paper discharge chain 9c, and the printing surface (irradiation) of the ink and varnish of the sheet 4 that moves in the part of the circulation path that is inclined with respect to the horizontal direction. Surface) with the ultraviolet irradiation port facing. According to this configuration, when the state of the sheet 4 is monitored from above, since the ultraviolet ray is not directly irradiated to the monitor, the monitor monitors the state of the sheet 4 without feeling dazzling. It becomes easy.
Since a space for providing the gripper 9d is required in the circulation path of the paper discharge chain 9c, the irradiation distance between the irradiation port of the light irradiation device 10 and the irradiation surface of the sheet 4 is a relatively long distance. Is set.
The light irradiation device 10 has been described as irradiating the sheet paper 4 conveyed in conjunction with the circulation movement of the paper discharge chain 9c with ultraviolet rays, but the sheet immediately after passing through the printing unit 5 and the coating unit 6 is used. You may provide in the position which irradiates the leaf paper 4 with an ultraviolet-ray.

2 is a perspective view showing the light irradiation device 10 from the back side, and FIG. 3 is a perspective view showing the light irradiation device 10 from the front side. FIG. 4 is an exploded perspective view showing the light irradiation device 10. FIG. 5 is a top view showing the line light source body 11 provided in the light irradiation device 10. FIG. 6 is an exploded perspective view of the line light source body 11. In the following description, the irradiation surface side of the light irradiation device 10 is the front surface of the device, and the opposite side to the front surface is the back surface of the device.
The light irradiation device 10 is used as a line light source device that emits line-shaped light extending in the longitudinal direction of the device. As shown in FIGS. 2 and 3, the light irradiation device 10 includes a housing 13. The housing 13 has an opening 15A on the front surface of the apparatus, and the opening 15A is configured as an irradiation opening. The opening 15A is covered with a cover 17 having transparency. The cover 17 may be made of a glass plate, for example. A cooling medium inlet port 63 (inlet) and a cooling medium outlet port 64 (outlet), which will be described later, are provided at one end in the longitudinal direction of the front of the apparatus. Further, a relay unit 60 is provided at one end in the longitudinal direction on the rear surface of the apparatus. The relay unit 60 is provided with a plurality of power terminals 62, and electric power is supplied to the light irradiation device 10 through an electric wire (not shown) connected to the power terminals 62. The cooling medium inlet port 63, the cooling medium outlet port 64, and the relay unit 60 are provided on the same end side in the longitudinal direction of the apparatus.

  As shown in FIG. 4, the light irradiation device 10 includes a line light source body 11 inside a housing 13. As shown in FIG. 5, the line light source body 11 includes a connected irradiation unit 12 including a plurality (11 in the present embodiment) of irradiation units 20 arranged in a line in the longitudinal direction of the light irradiation device 10. Further, as shown in FIG. 6, the line light source body 11 includes pipes 65 and 66 that are provided so as to sandwich the irradiation unit 20 from both sides and extend from one end of the arrangement of the irradiation units 20 to the other end. The irradiation units 20 are fixedly connected to the pipes 65 and 66 by the support frame 21, respectively. The cooling medium inlet port 63 and the cooling medium outlet port 64 are connected to one ends of the pipes 65 and 66, respectively.

The pipes 65 and 66 are made of, for example, a metal material such as aluminum and extend from one end portion to the other end portion of the array of at least the plurality of irradiation units 20 and are fixed to the support frame 14. The pipes 65 and 66 also function as a frame of the line light source body 11 and can improve the rigidity of the line light source body 11.
The pipes 65 and 66 are formed to have substantially the same height as the irradiation unit 20. The cross-sectional areas of the pipes 65 and 66 are preferably as large as possible within a range that can be accommodated in the housing 13 without increasing the size of the light irradiation device 10. According to this configuration, the water pressure in the pipes 65 and 66 can be kept constant to some extent, and a large difference in water pressure can be prevented between the side closer to the cooling medium inlet port 63 and the side far from the cooling medium inlet port 63.

As shown in FIG. 4, the housing 13 includes a support frame 14, a front frame 15, and a back cover 16. The support frame 14 includes a frame body 14A surrounding the line light source body 11 and a front plate 14B provided on the front side of the frame body 14A. The frame body 14A is provided with handles 14C on both end walls in the apparatus longitudinal direction, which is the direction in which the irradiation units 20 are arranged. The pipes 65 and 66 are formed in a rectangular tube shape, extend along the frame body 14 </ b> A, and are accommodated in the housing 13.
A front opening 14D is formed in the front plate 14B. A front frame 15 that covers at least a range where the front opening 14D is formed is attached to the front surface of the front plate 14B. The front frame 15 includes an opening 15 </ b> A that serves as an irradiation opening of the light irradiation device 10. The front opening 14D and the opening 15A are provided at positions corresponding to each other. A cover 17 is fitted into the front frame 15 so as to cover the opening 15A. The cover 17 has a larger surface area than the opening 15 </ b> A, and is disposed so as to be interposed between the front plate 14 </ b> B and the front frame 15.

The front plate 14B is provided with communication holes 14E and 14F communicating with the cooling medium inlet port 63 and the cooling medium outlet port 64, respectively, at one end in the longitudinal direction of the front of the apparatus at a position deviating from the front opening 14D. . The cooling medium inlet port 63 and the cooling medium outlet port 64 are formed in a range not covered by the front frame 15.
The back cover 16 is attached so as to cover the opening on the back side of the frame body 14A. The relay unit 60 described above may be configured integrally with the back cover 16 or may be configured separately. Moreover, although mentioned later for details, the irradiation unit 20 is comprised so that removal from the back side of the light irradiation apparatus 10 which removed the back cover 16 is independent.

<First Embodiment>
Next, the configuration of the irradiation unit 20 of the first embodiment will be described.
7A and 7B are diagrams showing the irradiation unit 20, where FIG. 7A is a perspective view and FIG. 7B is a perspective view with the auxiliary reflector 55 removed. FIG. 8 is a cross-sectional view of the irradiation unit, and FIG. 9 is an exploded perspective view. In the following description, the direction between the pipes 65 and 66 will be described as the width direction of the irradiation unit 20, and the direction along the arrangement direction of the irradiation units 20 will be described as the depth direction of each irradiation unit 20.
As shown in FIGS. 7 to 9, the irradiation unit 20 includes a light source device 30, a cooling member 22, and a support frame 21. In addition, auxiliary reflectors 55 are provided on both sides in the arrangement direction of the irradiation units 20. The light source device 30 and the cooling member 22 are integrally supported by the support frame 21. The light source device 30 is provided with a terminal block 50. The support frame 21 includes a support plate 34 that integrally supports the light source device 30 and the cooling member 22, and fixed beams 32 and 33 that fix the irradiation unit 20 to the pipes 65 and 66. The irradiation unit 20 is fixed to the pipes 65 and 66 by mounting the fixing beams 32 and 33 of the support frame 21 on the pipes 65 and 66 and using fixtures such as screws. According to these configurations, the irradiation unit 20 in which the light source device 30 and the cooling member 22 are integrally supported can be placed and fixed on the pipes 65 and 66, and the irradiation unit 20 can be easily assembled. can do.

  As shown in FIG. 7, a supply side pipe joint 67 is connected to a position corresponding to each irradiation unit 20 on the back side of the pipe 65. A pair of supply side pipe joints 67 are provided with the fixed beam 32 interposed therebetween. The irradiation unit 20 is provided with a receiving side pipe joint 27 connected to the cooling member 22 at one end on the side facing the pipe 65. A first connection pipe 81 is connected to the supply side pipe joint 67 and the reception side pipe joint 27, and the pipe 65 is connected to the cooling member 22 of the irradiation unit 20 by the first connection pipe 81.

  In addition, an outlet side pipe joint 68 is connected to a position corresponding to each irradiation unit 20 on the back side of the pipe 66. A pair of outlet side pipe joints 68 are provided with the fixed beam 33 interposed therebetween. The irradiation unit 20 is provided with a discharge side pipe joint 28 connected to the cooling member 22 at the other end on the side facing the pipe 66. A second connection pipe 82 is connected to the outlet side pipe joint 68 and the discharge side pipe joint 28, and the pipe 66 is connected to the cooling member 22 of the irradiation unit 20 by the second connection pipe 82.

  Further, the cooling member 22 of the irradiation unit 20 is provided with one intermediate pipe joint 29 </ b> A at one end 22 </ b> A of the cooling member 22 at the front and rear ends in the depth direction of the irradiation unit 20. Further, the cooling member 22 of the irradiation unit 20 is provided with the other intermediate pipe joint 29 </ b> B at the other end 22 </ b> B of the cooling member 22 at the front and rear ends in the depth direction of the irradiation unit 20. One intermediate pipe joint 29A and the other intermediate pipe joint 29B are connected by a third connection pipe 83. The third connecting pipe 83 is connected to the other end side 22B of the cooling member 22 on the cooling medium discharge side from the one end side 22A of the cooling member 22 on the cooling medium supply side through the outside of the irradiation unit 20. As the first connection pipe 81, the second connection pipe 82, and the third connection pipe 83, flexible tubes can be suitably used. Moreover, it is preferable that the 1st connection pipe 81, the 2nd connection pipe 82, and the 3rd connection pipe 83 are formed from the material excellent in thermal conductivity.

The cooling medium supplied from the pipe 65 to the cooling member 22 of the irradiation unit 20 through the first connection pipe 81 passes through the cooling member 22 and from the one end 22A of the cooling member 22 through the third connection pipe 83. The other end 22B is supplied. Then, the cooling medium deprived of heat from the cooling member 22 is discharged to the pipe 66 through the second connection pipe 82.
In this way, each of the irradiation units 20 is configured to be cooled by a cooling medium such as water. The cooling medium is supplied from the cooling medium inlet port 63 to the pipe 65, and is supplied from the pipe 65 to each irradiation unit 20. The cooling medium that has passed through the cooling member 22 of each irradiation unit 20 is sent to the cooling medium outlet port 64 via the pipe 66.

FIG. 9 is an exploded perspective view of the irradiation unit 20. As shown in FIG. 9, the cooling member 22 includes a first cooling member 43 and a second cooling member 44. In addition, in this embodiment, although the cooling member 22 has shown about the example comprised from the two cooling members of the 1st cooling member 43 and the 2nd cooling member 44, it is not restricted to this, The cooling member 22 is shown. The structure divided | segmented into two or more several cooling members may be sufficient.
Each of the first cooling member 43 and the second cooling member 44 includes a cooling jacket 40 and a jacket lid 45.

  The jacket lid 45 is formed with one connection hole 46A for connecting the receiving side pipe joint 27 or the discharge side pipe joint 28 and the other connection hole 46B for connecting the intermediate pipe joint 29A or the intermediate pipe joint 29B. . The jacket lid 45 is provided with two connection holes 46A and two connection holes 46B. The connection holes 46 </ b> A and 46 </ b> B are provided side by side along a predetermined side of the jacket lid 45. The connection holes 46A and 46B are arranged so that their installation intervals are substantially equal. In addition, the connection holes 46A and 46B are arranged such that the two connection holes 46A are disposed on the center side and the two connection holes 46B are disposed on both ends.

  The cooling jacket 40 is formed from a metal material having excellent thermal conductivity. The cooling jacket 40 is a plate-like member having a predetermined thickness, and the outer shape is formed in a rectangular shape. One surface side in the thickness direction of the cooling jacket 40 is configured as a heat receiving surface 41, and heat source is transferred from the light source device 30 to the cooling member 22 by bringing the light source device 30 into contact with the heat receiving surface 41. ing. On the other surface side in the thickness direction of the cooling jacket 40, at least two grooves 42A and 42B are formed.

  One groove 42A is provided at a position communicating with one connection hole 46A and one connection hole 46B arranged next to the connection hole 46A when the jacket cover 45 is attached to the cooling jacket 40. The other groove 42B is provided at a position communicating with the other connection hole 46A and the other connection hole 46B disposed adjacent to the connection hole 46A. The grooves 42 </ b> A and 42 </ b> B are provided over substantially the entire other side of the cooling jacket 40 in the thickness direction. In the present embodiment, the grooves 42A and 42B extend from the position corresponding to the connection hole 46A to the other side opposite to the one side where the connection hole 46A is provided, and bend along the other side. It extends from the side to one side to a position corresponding to the connection hole 46B. The grooves 42 </ b> A and 42 </ b> B may be provided so as to meander over the entire surface of the cooling jacket 40 in the thickness direction.

When the jacket lid 45 is fixed to the cooling jacket 40 so as to close the openings of the grooves 42A and 42B, the jacket lid 45 and the grooves 42A and 42B form a plurality of cooling channels 42 through which the cooling medium flows.
As shown in FIG. 6, the cooling member 22 is connected to the pipes 65 and 66 by the first connection pipe 81 and the second connection pipe 82. When the pressurized cooling medium is supplied to the cooling medium inlet port 63, the cooling medium is supplied from the pipe 65 to the cooling flow path 42 of the irradiation unit 20, and is discharged from the cooling medium outlet port 64 through the pipe 66. As described above, the cooling medium can be circulated.

More specifically, the cooling medium pressurized and supplied to the pipe 65 from the cooling medium inlet port 63 is supplied to the first cooling member 43 from the connection hole 46 </ b> A via the first connection pipe 81, and the cooling flow path 42. The first cooling member 43 is cooled. The cooling medium that has cooled the first cooling member 43 is supplied to the second cooling member 44 through the third connection pipe 83 from the connection hole 46B. Since the third connection pipe 83 connects the first cooling member 43 and the second cooling member 44 through the outside of the irradiation unit 20, the heat of the cooling medium flows while flowing through the third connection pipe 83. 20 is radiated to the outside. The cooling medium supplied to the second cooling member 44 from the connection hole 46 </ b> B via the third connection pipe 83 flows through the cooling flow path 42 of the second cooling member 44 and cools the second cooling member 44. The cooling medium that has cooled the second cooling member 44 is discharged from the connection hole 46 </ b> A to the pipe 66 through the second connection pipe 82.
In this way, the cooling medium circulates through the cooling flow path 42, whereby heat exchange is performed between the cooling medium and the irradiation unit 20, and the light source 25 described later is cooled.

  A waterproof groove 47 is formed at the edge of the cooling jacket 40, and a waterproof packing (for example, a silicon seal member) (not shown) is disposed in the waterproof groove 47. When the jacket lid 45 is fixed to the cooling jacket 40, the waterproof packing is pressed and deformed by the flat front surface of the jacket lid 45 to seal the space between the cooling jacket 40 and the jacket lid 45 in a watertight manner. Thereby, water leakage from the cooling channel of the irradiation unit 20 can be prevented. In addition, although illustration is abbreviate | omitted, as for the connection holes 46A and 46B, each pipe joint 27, 28, 29A, and 29B is connected watertight via the O-ring.

As described above, by setting the cross-sectional area of the pipe 65 as large as possible, the water pressure in the pipe 65 is kept constant to some extent. Thereby, in the irradiation unit 20 arranged in a plurality, even if the flow path length of the cooling medium from the cooling medium inlet port 63 to the irradiation unit 20 is different, the flow rate of the cooling medium in each irradiation unit 20 is not different. Therefore, the plurality of irradiation units 20 can be uniformly cooled. Thereby, the cooling efficiency of the light irradiation apparatus 10 whole can be improved.
Further, the first connection pipe 81 and the second connection pipe 82 that connect the cooling member 22 of each irradiation unit 20 to the pipes 65 and 66 are disposed without straddling the other irradiation units 20. Therefore, also when removing the irradiation unit 20 alone, as shown in FIG. 4, it can be easily removed from above the apparatus, and workability can be improved. Furthermore, since the cooling member 22 of each irradiation unit 20 can be connected to the pipes 65 and 66 at substantially the same position in the direction in which the irradiation units 20 are arranged, the lengths of the first connection pipe 81 and the second connection pipe 82 are obtained. Can be shortened, and wiring work can be simplified.

  The support plate 34 of the support frame 21 includes a flat portion 21A that is substantially parallel to the irradiation surface, and inclined portions 21B and 21C that extend obliquely from both side ends of the flat portion 21A toward the irradiation direction. The first cooling member 43 is fixed to one inclined portion 21B, and the second cooling member 44 is fixed to the other inclined portion 21C. The flat portion 21A is formed with a rectangular hole 21D penetrating the front and back, and the terminal block 50 is disposed at a position corresponding to the hole 21D. The terminal block 50 includes a plurality of terminals 58 placed on a bracket 59.

  Next, the configuration of the light source device 30 will be described. The light source device 30 includes first to sixth light source units 31A to 31F. Each of the first to sixth light source units 31 </ b> A to 31 </ b> F includes a reflection member 23 (23 </ b> A to 23 </ b> F), a light source 25, and a support base portion 26. Further, in each of the first to sixth light source units 31A to 31F, the light source 25 is disposed opposite to the reflecting surface 24 (24A to 24F) of the reflecting member 23, and the light from the light source 25 is reflected by the reflecting surface 24, which will be described later. The light is condensed at the condensing point F. The light source 25 includes an LED 125 and a mounting board 126 on which the LED 125 is mounted. The mounting substrate 126 is an aluminum substrate and is supported by the support base 26. The support base 26 is formed of a metal having excellent thermal conductivity, and is provided by being thermally connected to the heat receiving surface 41 of the cooling member 22. Further, the mounting board 126 is thermally connected to the support base 26, and heat from the LED 125 mounted on the mounting board 126 is transferred to the support base 26 via the mounting board 126.

The reflection member 23, the light source 25, and the support base 26 extend over the depth direction of the irradiation unit 20. In the light source 25, a plurality of LEDs 125 (12 light emitting elements in the present embodiment) are arranged in a line on the mounting substrate 126. Each LED 125 is a surface-mount type LED, and an SMD type or COB type LED can be suitably used.
The support base 26 is made of a material having excellent thermal conductivity. The support base portion 26 includes an attachment portion 35 having an attachment surface 35A to which the light source 25 is attached, and a heat dissipation portion 36 having a heat dissipation surface 36A in contact with the heat receiving surface 41. The attachment portion 35 is formed in a rod shape (block shape), and a flat plate-like heat radiation portion 36 is integrally formed on the back side of the attachment portion 35. The light source 25 is provided such that the back surface of the mounting substrate 126 is in contact with the mounting surface 35A of the mounting portion 35, and heat from the light source 25 is transferred to the heat radiating portion 36, and from the heat radiating portion 36 to the cooling member 22. Heat is transferred.

The reflection member 23 is made of a resin material, and a reflection film is formed on the surface by vapor-depositing aluminum. The reflecting surface 24 of the reflecting member 23 extends from the one end 123 on the back side of the reflecting member 23 to the other end 127 on the front side, is provided in the depth direction of the reflecting member 23, and has a predetermined radius of curvature.
In each of the first to sixth light source units 31 </ b> A to 31 </ b> F, the reflecting member 23 is disposed on the side close to the irradiation unit optical axis A that is the optical axis of the irradiation unit 20, and the light source 25 is disposed on the side far from the irradiation unit optical axis A. . Further, the first to sixth light source units 31A to 31F are arranged so that the light source device 30 is line-symmetric with respect to the irradiation unit optical axis A.

Specifically, as shown in FIGS. 8 and 9, in the light source device 30, the first light source unit 31 </ b> A and the second light source unit 31 </ b> B are arranged in the center of the irradiation unit 20. The first light source unit 31A and the second light source unit 31B are paired, and the reflecting surface 23 of the reflecting member 23A of the first light source unit 31A and the reflecting member 23B of the second light source unit 31B is disposed backward. Is done. The reflection member 23A and the reflection member 23B may be formed integrally. The reflecting members 23 </ b> A and 23 </ b> B may be formed in a block shape having a substantially triangular cross section that has the other ends 127 </ b> A and 127 </ b> B disposed on the irradiation unit optical axis A and extends in the depth direction of the irradiation unit 20.
On the back surface of the central reflecting member 51 composed of the reflecting member 23A and the reflecting member 23B, a flat portion 52 substantially parallel to the irradiation surface S is formed. The flat portion 52 is provided with a terminal block 50 for supplying power to the light source 25. The terminal block 50 is provided with a bracket 59 fixed on the flat portion 52. Note that a fixing portion for fixing the bracket 59 may be formed in a groove shape on the plane portion 52.

On both sides of the central reflecting member 51, a third light source unit 31C is provided on one side of the irradiation unit optical axis A, and a fourth light source unit 31D is provided on the other side. The third light source unit 31C and the fourth light source unit 31D are paired, and are arranged line-symmetrically with respect to the irradiation unit optical axis A.
In the reflecting members 23C and 23D of the third light source unit 31C and the fourth light source unit 31D, recesses 57C and 57D are provided in the depth direction of the irradiation unit 20 on the surface facing the central reflecting member 51. Yes. The recessed portions 57C and 57D are formed by recessing corner portions where the back surface side of the reflecting members 23C and 23D and the surface facing the central reflecting member 51 are continuous.

  The support base 26A of the first light source unit 31A is disposed in the recess 57C of the reflection member 23C, and the support base 26B of the second light source unit 31B is disposed in the recess 57D of the reflection member 23D. The recesses 57C and 57D are formed in shapes corresponding to the support bases 26A and 26B, respectively. When the light source 25 is attached to the mounting surface 35A of the support bases 26A and 26B and the support bases 26A and 26B are stored in the recesses 57C and 57D, the light sources 25 are inserted into the recesses 57C and 57D. It is configured so as to be accommodated and opposed to the central reflecting member 51. Further, when the support bases 26A and 26B are housed in the recesses 57C and 57D, the heat radiating part 36 of the support bases 26A and 26B is configured to be in contact with the rear surfaces of the reflecting members 23C and 23D over substantially the entire surface. Has been.

  Further, auxiliary reflecting surfaces 124C and 124D are provided below the recesses 57C and 57D on the surface of the reflecting members 23C and 23D facing the central reflecting member 51. The auxiliary reflecting surfaces 124C and 124D are constituted by a reflecting film formed by aluminum vapor deposition provided on the surfaces of the reflecting members 23C and 23D. The auxiliary reflecting surfaces 124C and 124D may be configured by a reflecting plate attached to the reflecting members 23C and 23D.

Further, the fifth light source unit 31E is arranged on the side farther from the irradiation unit optical axis A of the third light source unit 31C, and the sixth light source unit 31F is arranged on the side farther from the irradiation unit optical axis A of the fourth light source unit 31D. Has been.
The fifth light source unit 31E and the sixth light source unit 31F are paired and arranged symmetrically with respect to the irradiation unit optical axis A.
The reflecting members 23E and 23F of the fifth light source unit 31E and the sixth light source unit 31F are provided with recesses 57E and 57F in the depth direction of the irradiation unit 20 on the surfaces facing the reflecting members 23C and 23D. ing. The dents 57E and 57F are formed by denting the corners where the back side of the reflecting members 23E and 23F and the surface facing the reflecting members 23C and 23D are continuous.

The support base 26C of the third light source unit 31C is disposed in the recess 57E of the reflection member 23E, and the support base 26D of the fourth light source unit 31D is disposed in the recess 57F of the reflection member 23F. The recesses 57E and 57F are formed in shapes corresponding to the support bases 26C and 26D, respectively. When the light source 25 is attached to the attachment surface 35A of the support bases 26C and 26D and the support bases 26C and 26D are housed in the recesses 57E and 57F, the light sources 25 are inserted into the recesses 57E and 57F. It is configured so as to be accommodated and opposed to the reflecting members 23C and 23D. Further, when the support bases 26C and 26D are housed in the recesses 57E and 57F, the heat radiating part 36 of the support bases 26C and 26D is configured to be in contact with substantially the entire back surface of the reflecting members 23E and 23F. Has been.
In addition, auxiliary reflecting surfaces 124E and 124F are provided below the recessed portions 57E and 57F on the surfaces of the reflecting members 23E and 23F facing the reflecting members 23C and 23D.

  Further, the fifth light source unit 31E and the sixth light source unit 31F include support bases 26E and 26F arranged to face the reflection surfaces 24E and 24F of the reflection members 23E and 23F. Light sources 25 are attached to the support bases 26E and 26F so as to face the reflection surfaces 24E and 24F of the reflection members 23E and 23F, respectively. The support bases 26 </ b> E and 26 </ b> F are provided such that the back side is in contact with the heat receiving surface 41 of the cooling member 22. A second auxiliary reflector 172 is attached to each of the support bases 26E and 26F. The second auxiliary reflection plate 172 has an auxiliary reflection surface 172A that is disposed to face the reflection surfaces 24D and 24F of the reflection members 23E and 23F. The second auxiliary reflector 172 is disposed such that the end 172B is closer to the irradiation surface than the end 51A of the central reflecting member 51 is.

The central reflecting member 51 is fixed to the flat portion 21 </ b> A of the support frame 21 by a bracket 59 attached to the flat portion 52. The reflecting members 23 </ b> C and 24 </ b> E and the support bases 26 </ b> A, 26 </ b> C and 26 </ b> E are fixed to one inclined portion 21 </ b> B of the support frame 21 through the first cooling member 43. The reflecting members 23D and 23E and the support bases 26B, 26D, and 26F are fixed to the other inclined portion 21C of the support frame 21 via the second cooling member 44.
Thus, the first to sixth light source units 31A to 31F are arranged symmetrically with respect to the irradiation unit optical axis A. Further, the first to sixth light source units 31A to 31F are irradiated obliquely so that the unit far from the irradiation unit optical axis A is closer to the condensing point F than the unit closer to the irradiation unit optical axis A. The units 20 are arranged side by side in the width direction.

  According to these configurations, the first to sixth light source units 31 </ b> A to 31 </ b> F are slanted so that the units far from the irradiation unit optical axis A are closer to the condensing point than the units closer to the irradiation unit optical axis A. Since the first to sixth light source units 31A to 31F are arranged substantially parallel to the irradiation surface S, the width dimension of the light source device 30 can be reduced. Therefore, more light sources 25 can be arranged in the width direction without increasing the width dimension of the irradiation unit 20, and the light intensity (illuminance, light amount) can be increased.

Next, the optical path of the irradiation unit 20 will be described. FIG. 10 is a diagram illustrating an optical path of the irradiation unit 20.
As shown in FIG. 10, the light emitted from the light source 25 of the first light source unit 31 </ b> A is reflected by the reflecting member 23 </ b> A and is collected at the condensing point F on the irradiation surface S. Further, of the light from the light source 25 reflected by the reflecting member 23A, a part of the light that is not reflected toward the condensing point F is reflected by the auxiliary reflecting surface 124C provided on the reflecting member 23C and is collected. It is configured to go to F.
The light emitted from the light source 25 of the second light source unit 31B is reflected by the reflecting member 23B and is collected at the condensing point F on the irradiation surface S. Further, of the light from the light source 25 reflected by the reflecting member 23B, a part of the light that is not reflected toward the condensing point F is reflected by the auxiliary reflecting surface 124D provided on the reflecting member D and is condensed. It is configured to go to F.

The light emitted from the light source 25 of the third light source unit 31 </ b> C is reflected by the reflecting member 23 </ b> C and is collected at the condensing point F on the irradiation surface S. Further, of the light from the light source 25 reflected by the reflecting member 23C, a part of the light that is not reflected toward the condensing point F is reflected by the auxiliary reflecting surface 124E provided on the reflecting member 23E and is condensed. It is configured to go to F.
The light emitted from the light source 25 of the fourth light source unit 31D is reflected by the reflecting member 23D and collected at the condensing point F on the irradiation surface S. Further, of the light from the light source 25 reflected by the reflecting member 23D, a part of the light that is not reflected toward the condensing point F is reflected by the auxiliary reflecting surface 124F provided on the reflecting member 23F and is collected. It is configured to go to F.

The light emitted from the light source 25 of the fifth light source unit 31E is reflected by the reflecting member 23E and collected at the condensing point F on the irradiation surface S. Further, of the light from the light source 25 reflected by the reflecting member 23E, a part of the light that is not reflected toward the condensing point F is reflected by the auxiliary reflecting surface 172A of the auxiliary reflecting plate 172 provided on the support base 26E. And is configured to go to the condensing point F.
The light emitted from the light source 25 of the sixth light source unit 31F is reflected by the reflecting member 23F and collected at the condensing point F on the irradiation surface S. Further, of the light from the light source 25 reflected by the reflecting member 23F, a part of the light that is not reflected toward the condensing point F is reflected by the auxiliary reflecting surface 172A of the auxiliary reflecting plate 172 provided on the support base 26F. And is configured to go to the condensing point F.

  The light from the first to sixth light source units 31A to 31F is configured to be condensed in a predetermined range R with the condensing point F as the center. Each of the first to sixth light source units 31A to 31F includes a plurality of LEDs 125 arranged in the depth direction of the irradiation unit 20. With these configurations, the irradiation unit 20 forms a linear irradiation region having a width of the predetermined range R and extending in the depth direction of the irradiation unit 20. Furthermore, since the light irradiation apparatus 10 includes a plurality of irradiation units 20 arranged in a line, a linear irradiation region extending in the arrangement direction of the irradiation units 20 is formed. In the present embodiment, since the light sources 25 are arranged in six rows in the width direction of the irradiation unit 20, even if the irradiation region has a predetermined width, the light intensity (illuminance, Light quantity).

Further, since the auxiliary reflecting surfaces 124C, 124D, 124E, 124F, and 172A are provided at positions facing the reflecting surfaces 24A, 24B, 24C, and 24D, the light of the light source 25 reflected by the reflecting surfaces 24A, 24B, 24C, and 24D is provided. Among them, at least a part of the light not directed to the condensing point F can be directed to the condensing point F by the auxiliary reflecting surfaces 124C, 124D, 124E, 124F, and 172A. Therefore, the utilization efficiency of the light from the light source 25 can be improved, and the light intensity in the irradiation region can be further increased.
In addition, since the auxiliary reflectors 55 are provided at both ends in the arrangement direction of the irradiation units 20, the light leaking in the depth direction of the irradiation units 20 is reflected by the auxiliary reflector 55 and directed toward the condensing point F. The utilization efficiency of the light from the light source 25 can be improved.

  As described above, according to the embodiment to which the present invention is applied, the irradiation unit 20 includes the light source 25 and the reflection member 23 that reflects the light from the light source 25 and condenses it at the condensing point F. A plurality of units 31 are arranged side by side (see FIG. 10), and the light source unit 31 includes a recessed portion 57 that houses the light source 25 of the adjacent light source unit 31. According to this configuration, in the configuration in which a plurality of light source units 31 are arranged side by side, the light source unit 31 includes the recessed portion 57 that houses the light source 25 of the adjacent light source unit 31. The dimensions can be reduced as compared with the case where the light source 25 is arranged without providing the recess 57. Therefore, more light source units 31 can be arranged in a predetermined width dimension without increasing the irradiation unit 20, and the light intensity can be increased.

  Moreover, according to the embodiment to which the present invention is applied, the plurality of light source units 31 are arranged symmetrically with respect to the irradiation unit optical axis A of the irradiation unit 20. According to this structure, the light from each light source unit 31 is made to the condensing point F on the irradiation unit optical axis A by making the plurality of light source units 31 line symmetrical with respect to the irradiation unit optical axis A. It can be collected without complicating the structure. Moreover, what is necessary is just to assemble the some light source unit 31 so that it may become a line symmetrical structure with respect to the irradiation unit optical axis A, and assembly workability | operativity is good.

  Further, according to the embodiment to which the present invention is applied, the light source unit 31 has a condensing point F that is closer to the light source unit 31 on the side farther from the irradiation unit optical axis A than on the light source unit 31 closer to the irradiation unit optical axis A. Arranged to approach. According to this configuration, as compared with the case where the plurality of light source units 31 are arranged so as to be substantially parallel to the irradiation surface S, the light source units 31 are inclined so as to approach the condensing point F side as the distance from the irradiation unit optical axis A increases. In the case where the irradiation unit 20 is disposed, the dimension in the width direction of the irradiation unit 20 can be reduced. Therefore, more light source units 31 can be arranged in a predetermined width dimension without increasing the irradiation unit 20, and the light intensity can be increased.

  Further, according to the embodiment to which the present invention is applied, the light source unit 31 is arranged with the reflection members 23A to 23F on the irradiation unit optical axis A side and the light source 25 on the side far from the irradiation unit optical axis A. According to this configuration, by disposing the reflecting members 23A to 23F on the irradiation unit optical axis A side, even if the light source 25 and the reflecting members 23A to 23F are disposed close to each other, the condensing point F from the light source 25 is Light can be directed and the dimension of the irradiation unit 20 in the width direction can be reduced. Therefore, more light source units 31 can be arranged in a predetermined width dimension without increasing the irradiation unit 20, and the light intensity can be increased.

  Further, according to the embodiment to which the present invention is applied, the reflecting members 23C to 23F include the auxiliary reflecting surfaces 124C to 124F at positions facing the condensing reflecting surfaces 24A to 24D of the adjacent light source units 31A to 31D. According to this configuration, at least a part of the light that is not directed to the condensing point F among the light of the light source 25 reflected by the reflecting surfaces 24A to 24D is directed to the condensing point F by the auxiliary reflecting surfaces 124C to 124F. be able to. Therefore, the utilization efficiency of the light from the light source 25 can be improved, and the light intensity in the irradiation region can be further increased.

  Further, according to the embodiment to which the present invention is applied, the light irradiation apparatus 10 arranges the plurality of irradiation units 20 in a row and forms a line-shaped irradiation surface having a predetermined width. According to this configuration, when the varnish and ink printed on the sheet 4 are cured by the light irradiation device 10, the irradiation region of the sheet 4 can be quickly set as compared with the device that forms a linear irradiation surface. The varnish and ink can be cured by passing through, and the processing efficiency can be improved.

Moreover, according to the embodiment to which the present invention is applied, in the light irradiation device 10 in which a plurality of irradiation units 20 are arranged in a row, the irradiation units 20 are arranged on both sides of the irradiation unit 20 in the light irradiation device 10. Pipes 65 and 66 extending from one end to the other end are provided, and each of the irradiation units 20 includes two or more cooling members 43 and 44 in which a cooling channel 42 is formed. 43 of the irradiation unit 20 between the first connection pipe 81 connecting the cooling pipe 43 to one pipe 65, the second connection pipe 82 connecting one of the other cooling members 43 to the other pipe, and the cooling members 43, 44. And a third connection pipe 83 connected through the outside.
According to this configuration, since the cooling members 43 and 44 of the irradiation unit 20 can be connected to the pipes 65 and 66 provided on both sides in the width direction of the irradiation unit 20, the connection pipe straddles the irradiation units 20. Therefore, the maintenance of the irradiation unit 20 is improved. Further, since the third connection pipe 83 connecting the cooling members 43 and 44 is connected through the outside of the irradiation unit 20, the heat of the cooling medium can be radiated to the outside of the irradiation unit 20 when passing through the third connection pipe 83. The irradiation unit 20 can be efficiently cooled.

  Further, according to the embodiment to which the present invention is applied, since the third connecting pipe 83 is formed of a highly heat conductive material, the heat of the cooling medium is efficiently radiated to the outside of the irradiation unit 20 when passing through the third connecting pipe 83. The irradiation unit 20 can be cooled more efficiently.

  Further, according to the embodiment to which the present invention is applied, the cooling medium inlet port 63 is formed in one pipe 65, the cooling medium outlet port 64 is formed in the other pipe 66, the first connection pipe 81, the third connection The cooling medium was flowed in the order of the pipe 83 and the second connection pipe 82. According to this configuration, the irradiation unit 20 can be efficiently cooled by flowing the cooling medium from one side in the width direction of the irradiation unit 20 to the other.

  Moreover, according to the embodiment to which the present invention is applied, the irradiation unit 20 includes a flat portion 21A that is substantially parallel to the irradiation surface S, and an inclined portion that extends obliquely toward the irradiation direction from both side ends of the flat portion. 21B and 21C, and cooling members 43 and 44 are provided on the inclined portions 21B and 21C, respectively. According to this configuration, the dimension in the width direction of the irradiation unit 20 can be reduced as compared with the case where the entire irradiation unit 20 is provided substantially parallel to the irradiation surface S. Further, since the cooling members 43 and 44 are provided in the inclined portions 21B and 21C, respectively, even if the irradiation unit 20 is inclined, the irradiation unit 20 can be efficiently cooled without increasing the size.

  Moreover, according to the embodiment to which the present invention is applied, the terminal block 50 is provided in the flat portion 21A. According to this configuration, the terminal block 50 can be provided without complicating the structure of the irradiation unit 20. Moreover, since the terminal block 50 can be provided by efficiently using the surplus space, the irradiation unit 20 can be downsized.

<Second Embodiment>
By the way, in the light irradiation apparatus 10 mentioned above, the further higher output may be requested | required. In the irradiation unit 20 of the first embodiment, a plurality of SMD type or COB type surface mount type LED light sources are arranged in a line on the mounting substrate 126. In order to increase the output of the light irradiation device 10 without increasing the size of the device, an irradiation unit 520 using a light source 525 in which a large number of LED bare chips are directly connected to a mounting substrate can be used. Hereinafter, as a second embodiment of the present invention, a light illumination device 10 having an irradiation unit 520 using a light source 525 in which a large number of LEDs 625 are directly connected to a mounting substrate 626 will be described. In the following description, the same components as those in the first embodiment described above are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

FIG. 12 is a front view showing the irradiation unit 520 of the second embodiment. FIG. 13 is a diagram showing the light source 525, and FIG. 14 is a diagram showing the light source module 450. 15 and 16 are diagrams showing the reflecting member 523.
As shown in FIG. 12, the irradiation unit 520 includes a light source device 530. The light source device 530 includes first to sixth light source units 531A to 531F arranged side by side in the width direction of the irradiation unit 520. Each of the first to sixth light source units 531A to 531F includes a reflecting member 523 (523A to 523F) and a light source 525. In addition, the first to sixth light source units 531A to 531F are respectively arranged so that the light source 525 is opposed to the reflection surface 524 (524A to 524F) of the reflection member 523, and the light of the light source 525 is reflected by the reflection surface 524 and collected. Condensed to light spot F.

As illustrated in FIG. 13, the light source 525 includes an LED 625 and a mounting substrate 626 on which the LED 625 is mounted. The mounting substrate 626 is an aluminum substrate and has excellent thermal conductivity, and is thermally connected to the heat receiving surface 541 of the reflecting member 523 and supported by the reflecting member 523. The LED 625 is a so-called bare chip type high-power LED element that is not packaged, and is a UV-LED that emits ultraviolet light having a wavelength of 385 nm in this embodiment.
In this embodiment, the light source 525 is a line light source in which 48 LEDs 625 are arranged in a row on a rectangular flat plate-shaped mounting board 626. The light source 525 has a double output compared to the light source 25 used in the irradiation unit 20 of the first embodiment described above, and is configured to be a light source having a brightness that is approximately four times as bright.

  Further, as shown in FIG. 14, a light source 525, a plate 550 having an emission opening 551 facing a plurality of LEDs 625 mounted in a row, and placed on the mounting surface of the mounting substrate 626, and the emission of the plate 550 A light source module 450 is configured with a light-transmitting cover 553 covering the opening 551. The plate 550 is a plate-like member having a predetermined thickness. The plate 550 is provided on the inner periphery of the emission opening 551, and the inner peripheral wall portion 552 having a height corresponding to the thickness of the plate 550 is configured to function to reflect the light from the LED 625 toward the emission opening 551. ing. The inner peripheral wall portion may have a structure in which a reflective film is deposited, or may be mirror-finished to form a reflective surface. In the light source module 450, the directivity of light from the LED 625 is improved by the inner peripheral wall portion 552 of the plate 550. The plate 550 may be formed of a resin material, or may be formed of a metal having excellent thermal conductivity, such as an aluminum alloy.

  As described above, the light source 525 has a large number of LEDs 625 which are high-power LED elements mounted on the mounting substrate 626. Further, the light from the LED 625 is improved in directivity by the plate 550 and is irradiated to the reflecting member 523. As described above, in the irradiation unit 520, the output of the entire light irradiation device 10 is increased, and light having high output and high directivity is irradiated onto the reflecting member 523. Thereby, as for the reflection member 523, the part irradiated with the light from LED625 becomes high temperature. As described above, the reflective member 23 of the first embodiment is formed of a resin material, and a reflective film is formed on the surface by vapor-depositing aluminum. When light having high output and high directivity is irradiated to the reflecting member 23 in which a reflective film is formed by depositing aluminum on the surface of the resin material, the resin is deformed by heat due to light irradiation and reflected. There was a possibility that distortion such as wrinkles occurred in the film.

Therefore, the irradiation unit 520 of the second embodiment includes the reflection member 523 that is easy to manufacture and has high heat dissipation, and even if the light having high output and high directivity is irradiated, the performance of the reflection member 523 is achieved. Is configured to be maintained.
Hereinafter, the configuration of the reflecting member 523 will be described in detail.
As shown in FIG. 15, the reflection member 523 includes a base material 560 and a thin plate-like reflection plate 570 attached to the surface of the base material 560.

The base material 560 is made of a lightweight metal having excellent thermal conductivity, such as an aluminum alloy. The base material 560 is formed in a substantially V shape in a sectional view extending over the depth direction of the irradiation unit 520. The substrate 560 has one side 562 extending from the V-shaped apex 561 and the other side 563.
The base material 560 includes a recess 451 (light source holding unit) that holds the light source module 450 of the adjacent light source unit 531 on the other side surface 563. The recessed portion 451 is provided on the other side surface 562 on the end side opposite to the V-shaped apex. Further, the recess 451 extends in the depth direction of the base material 560.

The light source module 450 is attached such that the surface opposite to the mounting surface of the mounting substrate 626 is brought into surface contact with the heat receiving surface 541 which is the bottom surface of the recess 451. When the light source module 450 is attached to the recess 451, the light-emitting cover 553 that covers the light-emitting opening 551 is provided so that the light-emitting surface of the light-transmitting cover 553 is substantially flush with the surface of the reflecting member 523.
When one side 562 of the substrate 560 is attached with the reflector 570 along the surface shape of the one side 562, the light of the light source module 450 arranged to face the one side 562 is reflected by the reflector 570. It is formed in a curved surface that is optically designed so as to be reflected at the predetermined condensing point.

  The reflection plate 570 is a flat plate having a thickness of 300 to 400 μm formed from a material having excellent thermal conductivity, for example, an aluminum alloy. The reflection plate 570 is bent along the apex 561 of the base material 560 and attached to the base material 560 so as to cover the base plate 560 from the apex 561 side. Further, the reflection plate 570 is configured to cover the entire one side 562 of the base 560 and the entire upper side of the recess 451 of the other side 563.

  The reflector 570 is attached along the surface of the base material 560 with a heat-resistant adhesive or adhesive applied to the surface of the base material 560 with a certain thickness. In addition, the reflecting plate 570 is evenly attached along the surface of the base material 560 while applying pressure to one of the curved side surface 562 and the other side surface 563 with a roller or the like. The reflection plate 570 may have a configuration in which a heat-resistant double-sided tape is attached to the surface of the base material 560. By using a double-sided tape having a constant thickness in advance, the reflector 570 can be attached to the surface of the base material 560 more easily than applying a pressure-sensitive adhesive or adhesive to the surface of the base material 560 with a constant thickness.

  As shown in FIG. 16, the central reflecting member 555 composed of the reflecting member 523A and the reflecting member 523B is formed on the side surface of the base material 660 formed from a lightweight metal having excellent thermal conductivity, for example, an aluminum alloy. A reflecting plate 570 is pressed and pasted along. The base material 660 is formed in a curved surface in which both side surfaces 662 and 663 extend from the vertex 661 in a substantially V shape. When the reflector 570 is attached to the base 660 along the surface shapes of the both side surfaces 662 and 663, the light of the light source module 450 arranged to face the side surfaces 662 and 663 is reflected by the reflector 570. It is formed in a curved surface that is optically designed so as to collect light at a predetermined condensing point.

  Note that the reflecting member 523 has a configuration in which a reflecting plate 570 made of a material having a plate thickness of 300 to 400 μm and excellent in thermal conductivity is attached to the surface of the base material 560, and thus the entire reflecting plate 570 is heated by light irradiation. Can be transferred to dissipate heat. Therefore, heat dissipation can be improved only by the configuration of the reflection plate 570 as compared with the reflection member 23 in which the reflection film is formed by the vapor deposition film. Therefore, as a modification of the second embodiment in which the reflective plate 570 is attached to the base material 560 formed from metal, a configuration in which the reflective plate 570 is attached to the base material 760 formed from resin may be used.

FIG. 17 is a diagram showing a reflecting member 723 in which a reflecting plate 570 is attached to a base material 760 formed from a resin. FIG. 18 is a diagram showing a central reflecting member 755 composed of a reflecting member 723A and a reflecting member 723B.
As shown in FIG. 17, in the configuration in which the reflector 570 is attached to the base material 760 formed from resin, the light source 25 or the light source 525 is supported by and supported by the support base portion 26 as in the first embodiment described above. Cooled by the cooling member 22 through the base 26.
The reflection plate 570 is evenly attached to the resin base material 760 along the surface with a double-sided tape 770. The reflection plate 570 transfers heat from the light source from the light source to the entire reflection plate 570 to dissipate the heat, so that the temperature of the base material 760 can be prevented from being increased and deformed.

  As shown in FIG. 18, the central reflecting member 755 is formed by pressurizing and pasting the reflecting plate 570 along the side surface of the base material 780 made of a resin material. The base material 780 is formed in a curved surface in which both side surfaces 782, 783 extend from the apex 781 in a substantially V shape. When the reflecting plate 570 is attached along the surface shape of the both side surfaces 782 and 783, the light of the light source 25 disposed facing the side surfaces 782 and 783 is reflected by the reflecting plate 570. It is formed in the curved surface optically designed so that it may condense on the condensing point.

As described above, according to the embodiment to which the present invention is applied, the light source unit 531 including the light source 525 and the reflection member 523 that reflects the light from the light source 525 and collects the light at the condensing point is provided. A plurality of units 531 are arranged side by side, and the reflection member 523 includes a base member 560 and a thin plate-like reflection plate 570 attached along the surface of the base member 560, and the light source 525 is a base of the adjacent light source unit 531. The material 560 is held.
According to this configuration, the base member 560 and the reflecting plate 570 are configured separately, and the reflecting member 523 is configured by attaching the thin plate-like reflecting plate 570 having a predetermined thickness along the surface of the base member 560. ing. For this reason, the heat of the reflecting plate 570 due to the light irradiation from the light source 525 is not easily transferred to the base material 560, and thermal deformation of the base material 560 can be suppressed. Further, since the reflecting plate 570 can be attached along the surface of the substrate 560 to form a reflecting surface, the reflecting surface is formed by vapor deposition on the surface of the substrate 560, or the surface of the substrate 560 is mirror-finished. Thus, the reflecting surface can be easily formed as compared with the configuration in which the reflecting surface is formed. Therefore, the irradiation unit 520 including the reflecting member 523 that is easy to manufacture and has high heat dissipation can be provided.

Moreover, according to the embodiment to which the present invention is applied, the base material 560 is formed of a metal material.
According to this configuration, the mounting substrate 626 of the light source module 450 can be directly attached to the base material 560, heat generated from the LED 625 can be transferred to the base material 560, and the LED 625 can be cooled. Further, even if heat is applied from the light reflector 570 to the base material 560 from the light source 525, the base material 560 does not undergo thermal deformation. Also, compared to forming a reflective surface by mirror-finishing the surface of the base material 560, the reflective surface can be formed only by attaching the reflective plate 570 along the surface of the base material 560. Can be omitted. Therefore, the irradiation unit 520 including the reflecting member 523 that is easy to manufacture and has high heat dissipation can be provided.

Further, according to the embodiment to which the present invention is applied, the base material 760 is formed of a resin material.
According to this configuration, the reflection plate 570 formed of a metal material is attached along the surface of the base material 760 of the resin material to form the reflection surface, and therefore the heat of the light irradiation portion of the reflection plate 570 is reflected on the reflection plate. Heat can be transferred to the whole 570 to dissipate heat, and thermal deformation of the substrate 760 can be suppressed. Further, the reflecting plate 570 does not wrinkle or peel off the reflecting surface as compared with the reflecting film deposited on the surface of the substrate.

Moreover, according to the embodiment to which the present invention is applied, the reflector 570 is formed to a thickness t of 300 μm to 400 μm.
According to this configuration, even if the surface of the base material 560 is somewhat uneven, it can be hidden by the reflector 570 and can be easily leveled along the surface of the base material 560. For example, when the thickness t of the reflecting plate 570 is less than 300 μm, handling is difficult, and when the surface of the base material 560 has irregularities, the irregularities cannot be hidden by the reflecting plate, and irregularities appear on the reflecting surface. Further, when the thickness t of the reflection plate 570 is larger than 400 μm, it is difficult to level the surface along the surface shape of the base material 560. Therefore, by setting the thickness t of the reflection plate 570 to 300 μm to 400 μm, it is possible to configure the reflection member 523 that is easy to manufacture and has high reflection performance.

In addition, according to the embodiment to which the present invention is applied, the base 560 has one side 562 that is a surface facing the light source 525 formed in a curved surface, and the reflection plate 570 is pasted along the curved surface. Yes.
According to this configuration, even if one side surface 562 of the substrate 560 is a curved surface, the reflecting plate 570 can be attached with high accuracy along the curved surface, and the curved reflecting surface can be configured with high accuracy. Therefore, it is possible to form a highly accurate reflective surface more easily than forming a curved reflective surface by vapor deposition or mirror finishing.

Further, according to the embodiment to which the present invention is applied, the light source 525 is a line light source in which a plurality of LEDs 625 are arranged in a line, and the base material 560 extends in the extending direction of the light source 525, and the light source One side 562 facing the light source 525 of the unit 531 and the other side 563 having a recess 451 that functions as a light source holding part for holding the light source 525 of the adjacent light source unit 531 are formed in a continuous V shape, The reflection plate 570 is attached to both surfaces of one side 562 and the other side 563 so as to cover the base 560 from the V-shaped apex side.
According to this configuration, the reflecting surface can be easily formed on both the side surface 562 that is a curved surface and the other side surface 563 of the flat surface. As a result, the light reflected from the one side 562 side, which is the main reflection surface of the light from the light source 525, and the light reflected from the main reflection surface of the adjacent light source unit 531 is not reflected toward the condensing point. It is possible to easily form the auxiliary reflection surface on the other side surface 563 functioning as an auxiliary reflection surface that reflects part of the light and directs it toward the condensing point F.

The above-described embodiment is an aspect of the present invention, and it is needless to say that the embodiment can be appropriately changed without departing from the gist of the present invention.
FIG. 11 is a cross-sectional view showing a modified irradiation unit 120. As shown in FIG. 11, the irradiation unit 120 includes, for example, a pair of reflecting members 230A and 230B in which the reflecting surfaces 240A and 240B face each other, and reflecting members 230C and 230D that are arranged on both sides of the reflecting members 230A and 230B. The light source 250 may be disposed opposite to the reflection surfaces 240A to 240D of the reflection members 230A to 230D. In the irradiation unit 120, the reflecting members 230A to 230D are arranged on the irradiation unit optical axis A side, and the light source 250 is arranged on the side far from the irradiation unit optical axis A. The reflection members 230A and 230B are formed with recesses 580A and 580B in which the light sources 250 of the adjacent light source units 310C and 310D are accommodated. As described above, since the recesses 570A and 570B that house the light sources 250 of the adjacent light source units 310C and 310D are provided in the reflecting members 230A and 230B, the dimension in the width direction of the irradiation unit 120 can be reduced.

Moreover, although LED125,625 was demonstrated as what radiates | emits an ultraviolet-ray in embodiment mentioned above, it is not limited to this, You may radiate | emit infrared light and visible light. For example, when an LED that irradiates infrared light is used as a light source, the light irradiation device 10 can be used in the field of film production.
Moreover, in embodiment mentioned above, although LED was illustrated as an example of a light emitting element, not only this but arbitrary light emitting elements can be used for a light source.

DESCRIPTION OF SYMBOLS 10 Light irradiation apparatus 20,120,520 Irradiation unit 21 Support frame 21A Flat part 21B Inclination part 21C Inclination part 22 Cooling member 23 (23A-23F), 230 (230A-230D), 523 Reflection member 24 (24A-24F), 240 (240A to 240D), 524 Reflecting surface 25, 250, 525 Light source 26 (26A to 26F) Support base 30, 530 Light source device 31 (31A to 31F), 531 (531A to 531F) Light source unit 32 First cooling member 33 Second cooling member 42 Cooling flow path 43 First cooling member 44 Second cooling member 45 Jacket lid 50 Terminal block 55 Auxiliary reflector 57 (57C to 57F), 570A, 570B Recessed portion 60 Relay unit 63 Cooling medium inlet port (flow) entrance)
64 Cooling medium outlet port (outlet)
65 Pipe 66 Pipe 72 Second auxiliary reflector 81 First connection pipe 82 Second connection pipe 83 Third connection pipe 125, 625 LED
126, 626 Mounting substrate 450 Light source module 560, 760 Base material 562 One side surface (curved surface)
563 Other side 570 Reflector A A Irradiation unit optical axis F Condensing point S Irradiation surface

Claims (7)

A light source unit comprising: a light source; and a reflective member that reflects light from the light source and collects the light at a condensing point.
A plurality of the light source units are arranged side by side,
The reflective member includes a base material, and a thin plate-shaped reflective plate attached along the surface of the base material,
The said light source is hold | maintained at the said base material of the said adjacent light source unit. The irradiation unit characterized by the above-mentioned.   The irradiation unit according to claim 1, wherein the base material is made of a metal material.   The irradiation unit according to claim 1, wherein the base material is formed of a resin material.   The irradiation unit according to claim 1, wherein the reflection plate is formed to a thickness of 300 μm to 400 μm. The base material is formed on a curved surface that is optically designed so that a surface facing the light source reflects light from the light source and collects it at a condensing point.
The irradiation unit according to claim 1, wherein the reflector is attached along the curved surface. The light source is a line light source in which a plurality of LEDs are arranged in a line,
The base material extends in the extending direction of the light source, and one side surface of the light source unit that faces the light source and the other side surface having a light source holding part that holds the adjacent light source unit are continuous. Formed in a V shape,
6. The reflector according to claim 1, wherein the reflector is placed on the base material from the top of the V-shape and attached to both surfaces of the one surface and the other surface. The irradiation unit according to any one of the above. A light irradiation device comprising the irradiation unit according to claim 1,
A light irradiation apparatus comprising a plurality of the irradiation units arranged in a line, and forming a line-shaped irradiation surface having a predetermined width.

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