JP6432160B2 - Light source unit and light source device - Google Patents

Description

  The present invention relates to a light source unit and a light source device.

  As a light source unit using an LED as a light source, there is known a unit structure in which a plurality of pairs of a reflecting mirror and an LED arranged at a position opposite to a reflecting surface of the reflecting mirror are arranged side by side (for example, Patent Documents). 1).

JP 2013-208792 A

However, in the conventional unit structure, when the unit width in the arrangement direction of the set of the LED and the reflector is shortened, there are the following problems.
In other words, the unit width can be shortened by reducing the distance by bringing the LED closer to the reflecting surface of the reflecting mirror, but the influence of the size of the light emitting point of the LED and the like when the light source approaches the reflecting surface that is the light control surface. There is a problem that the accuracy of light control by the reflecting surface is lowered.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a light source unit and a light source device that can realize downsizing while suppressing an influence on light control by a reflecting surface.

In order to achieve the above object, the present invention provides a light source unit in which a plurality of sets of a reflecting mirror and a light emitting element arranged opposite to the reflecting surface of the reflecting mirror are provided side by side. The surfaces face each other, and the light emitting elements are housed in the respective reflecting surfaces facing each other, each of the reflecting surfaces condenses the light of the light emitting elements at the same target point, and on each of the light emitting elements, A light control member that distributes light according to the opposing reflection surface is provided, the light control member is a lens having a convex light output surface, and the reflection surface has a curved surface having a predetermined curvature. The reflecting surface for accommodating the light emitting element and the lens is divided into a first reflecting surface closer to the emitting side and a second reflecting surface farther from the emitting side than the first reflecting surface with the lens as a boundary. The first reflecting surface is a vertex of the light exit surface of the lens. That is provided in accordance with the said curved surface, the second reflective surface, characterized in that it is provided in accordance with the said curved surface passing through the edge of the light exit surface of the lens.

  In order to achieve the above object, the present invention comprises a plurality of the light source units according to any one of the above, and each of the light source units is arranged in a direction orthogonal to a horizontal direction of the set. A light source device is provided.

According to the present invention, in a light source unit in which a plurality of sets of a reflecting mirror and a light emitting element disposed opposite to the reflecting surface of the reflecting mirror are provided side by side, the light emitting element that forms a pair with the reflecting mirror is connected to the reflecting mirror. It was set as the structure accommodated in another set of reflecting mirrors which oppose the reflective surface.
With this configuration, the distance between the reflecting mirror and the light emitting element in each group is not shortened, and the unit width in the side-by-side direction of each group can be reduced by the arrangement pace of the light emitting elements, and the light source unit can be downsized. It becomes.

1 is a schematic diagram of a sheet-fed printing press according to an embodiment of the present invention. It is a figure which shows the structure of an ultraviolet irradiation device, (A) is a top view, (B) is a front view, FIG. (C) is a bottom view. It is a side view of an ultraviolet irradiator. It is a figure which shows the internal structure of an ultraviolet irradiation device, and is a perspective view seen from the upper side. It is an AA arrow line view of Drawing 2 (C). It is a figure which shows the structure of an LED light source unit, (A) is a top view, (B) is a bottom view, (C) is a side view. It is BB sectional drawing of FIG.6 (C). It is a schematic perspective view of an LED light source unit. It is explanatory drawing of the light irradiation of a light source unit. It is a figure which shows the light source unit which concerns on the comparative structural example of a LED light source unit. It is a figure which shows the illumination intensity distribution in the target point of the LED light source unit and the light source unit which concerns on a comparative structural example, (A) shows the illumination intensity distribution of a LED light source unit, (B) is the illumination intensity distribution of the light source unit which concerns on a comparative structural example. Indicates. It is a figure which expands and shows the structure of the reflective surface side exposed part of a reflective surface. It is a figure which shows the structure of the LED light source unit which concerns on the modification of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram of a sheet-fed printing press 1 according to the present embodiment.
As shown in FIG. 1, the sheet-fed printing machine 1 includes a paper feeding device 2, a printing unit 5, a coating unit 6, a paper discharge device 7, and an ultraviolet irradiator 10.
The basic configuration of the sheet-fed printing press 1 is the same as that described in Japanese Patent Application Laid-Open No. 2011-50909. That is, the paper feeding device 2 feeds the sheet 4 prepared on the paper feed tray 3, and the printing unit 5 causes the ink (activation energy ray curable ink) to be applied to the sheet 4 with a desired pattern. Further, the coating unit 6 prints a varnish (activated energy ray curable varnish) on the sheet 4. 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 passes through a paper discharge table 8, a conveyance means 9 for conveying the sheet 4 sent from the coating unit 6 to the paper discharge table 8, and a predetermined portion of a conveyance path to the paper discharge table 8. An ultraviolet irradiator 10 is provided for irradiating the sheet 4 to be irradiated with ultraviolet rays to cure the ink and varnish printed on the sheet 4.
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. A sheet discharge chain 9C that circulates in conjunction with the rotation of 9A and 9B is provided, and the sheet 4 fed from the coating unit 6 is conveyed to the sheet discharge table 8 by the circulation of the sheet discharge chain 9C.

The circulation path of the paper discharge chain 9C includes an outward path for moving the sheet 4 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.
In the circulation path of the paper discharge chain 9C, the forward path and the backward path are inclined with respect to the horizontal direction in some sections, and the forward path and the backward path are extended in the horizontal direction in other sections.
A gripper 9D is provided along the circulation path of the paper discharge chain 9C. The gripper 9D holds the sheet 4 and conveys the sheet 4 in conjunction with the travel of the paper discharge chain 9C. During this conveyance, the sheet 4 is conveyed with the surface on which the ink and varnish are printed facing the inside of the circulation path.

The ultraviolet irradiator 10 is an irradiating device that irradiates ultraviolet rays, and is disposed inside the circulation path of the paper discharge chain 9C. The ink is disposed with the ultraviolet irradiation port facing the printing surface (irradiation surface) of the ink and varnish. When monitoring the state of the sheet 4 from above, the monitor is not directly irradiated with ultraviolet rays, so that the monitor can easily monitor the condition of the sheet 4 without feeling dazzling. The varnish and ink are cured by applying ultraviolet rays from the irradiation port to the sheet 4. Further, since a space for providing the gripper 9D is required, the irradiation distance between the irradiation port of the ultraviolet irradiator 10 and the irradiation surface of the sheet 4 is set to a relatively long distance.
Although the ultraviolet irradiator 10 has been described as irradiating ultraviolet rays onto the sheet 4 conveyed in conjunction with the circulation movement of the paper discharge chain 9C, the sheet immediately after passing through the printing unit 5 and the coating unit 6 is described. You may provide in the position which irradiates the leaf paper 4 with an ultraviolet-ray.

  2A and 2B are diagrams showing a configuration of the ultraviolet irradiator 10, in which FIG. 2A is a plan view, FIG. 2B is a front view, and FIG. 2C is a bottom view. FIG. 3 is a side view of the ultraviolet irradiator 10. 4 and FIG. 5 are views showing the internal structure of the ultraviolet irradiator 10, FIG. 4 is a perspective view seen from above, and FIG. 5 is a view taken along the line AA in FIG.

The ultraviolet irradiator 10 is an irradiation device that irradiates ultraviolet rays in a line extending in a direction crossing the conveyance path, and has a substantially rectangular box-shaped case body 11. As shown in FIGS. 4 and 5, the inside of the case body 11 is divided into a light source chamber 12A and a relay chamber 12B, and an ultraviolet LED light source device 30 is housed in the light source chamber 12A.
Further, as shown in FIG. 2C, an irradiation opening 13 is provided on the bottom surface of the case body 11 corresponding to the light source chamber 12A. The irradiation opening 13 is closed by a cover plate 14 supported on the case body 11 by a support frame 11A, and the cover plate 14 is preferably made of quartz glass made of an ultraviolet resistant material.

The relay chamber 12B is a unit in which various members for connecting the power source and the chiller unit 20 (FIG. 3) to the case body 11 are provided. As shown in FIGS. 2 and 3, a power connector 15 and a control connector 16 are provided on the upper surface of the case body 11 at positions corresponding to the relay chamber 12B. A pair of joints 17 is provided at a position corresponding to 12B.
The power connector 15 is a connection terminal of a power line that supplies power to the ultraviolet LED light source device 30 housed in the case body 11, and the control connector 16 is a control that transmits a signal for controlling blinking of the ultraviolet LED light source device 30. It is a connection terminal for wires. The joint 17 connects a refrigerant pipe 18 extending from the chiller unit 20.

  The chiller unit 20 is a water-cooled cooler built in the sheet-fed printing press 1 or installed separately, and circulates cooling water to the ultraviolet irradiator 10 through the refrigerant pipe 18 to incorporate an ultraviolet LED built into the ultraviolet irradiator 10. Heat is recovered from the light source device 30. The chiller unit 20 cools the cooling water discharged through the ultraviolet irradiator 10. In this cooling, the chiller unit 20 is supplied to the ultraviolet irradiator 10 and discharged from the ultraviolet irradiator 10. Cooling is performed so that the temperature difference of the cooling water is maintained at a predetermined temperature difference (eg, 3 ° C.). In addition, as a refrigerant | coolant which cools the ultraviolet irradiation device 10, not only cooling water but arbitrary refrigerant | coolants (liquid or gas) can be used.

  At both ends of the case body 11 of the ultraviolet irradiator 10, there are provided rotary grip portions 19 that are gripped by the operator. At the time of maintenance of the sheet-fed printing machine 1, the operator holds the grip unit 19 of the ultraviolet irradiator 10, and the ultraviolet irradiator 10 is taken in and out from the side wall of the sheet-fed printing machine 1.

As shown in FIGS. 4 and 5, a cooling tube 22 that cools the ultraviolet LED light source device 30 is provided inside the case body 11. Specifically, the cooling pipe 22 is a pipe formed of a material having high thermal conductivity and corrosion resistance, such as stainless steel or copper, in which cooling water flows, and the heat of the outer peripheral surface of the pipe is cooled inside. Tell the water and collect.
The cooling tube 22 includes a first tube body 22A and a second tube body 22B that extend linearly over the longitudinal direction of the light source chamber 12A. The first tube body 22A and the second tube body 22B are respectively connected to joints 17 and 17 connected to the relay chamber 12B, and at the end of the light source chamber 12A (the end opposite to the relay chamber 12B). By being connected, a circulation path (outward path and return path) of cooling water that circulates and circulates between the joints 17 and 17 is configured.

  In the ultraviolet irradiator 10, the pair of cooling pipes 22, 22 are installed in the case body 11 in parallel with each other, and the respective cooling pipes 22 are connected to the joints 17, 17, thereby being parallel to each other. A pair of circulation paths are formed.

  In the light source chamber 12A of the case body 11, as shown in FIG. 4, a pipe fixing bracket 24 is installed between both side walls 23, 23 in the width direction (direction orthogonal to the longitudinal direction). The pipe fixing bracket 24 is a member that supports and fixes the cooling pipe 22, and is provided at a predetermined interval F in the longitudinal direction of the case body 11. The predetermined interval F is set to be approximately equal to the length in the longitudinal direction of the LED light source unit 31 described later. In other words, the pipe fixtures 24 are disposed at both ends of each LED light source unit 31.

As shown in FIG. 5, these pipe fixing brackets 24 are provided on the top surface 25 side of the case body 11 so as to support and fix the pair of cooling pipes 22, 22.
In the ultraviolet irradiator 10, the LED light source units 31 constituting the ultraviolet LED light source device 30 are supported by the pair of cooling tubes 22 and 22.

  As shown in FIGS. 4 and 5, the ultraviolet LED light source device 30 includes a plurality (eight in the illustrated example) of LED light source units 31, and these LED light source units 31 are linearly connected to each other to generate an ultraviolet ray line. A light source is configured.

6A and 6B are diagrams showing the configuration of the LED light source unit 31. FIG. 6A is a plan view, FIG. 6B is a bottom view, and FIG. 6C is a side view. FIG. 7 is a cross-sectional view taken along the line BB in FIG. FIG. 8 is a schematic perspective view of the LED light source unit 31.
Note that FIG. 6B and FIG. 6C also show LEDs. Further, in FIG. 7, the members related to fixing the LED light source unit 31 are shown together with the LED light source unit 31, and the main part of the cooling structure is hatched in the cross section of each member.

As shown in FIGS. 6 to 8, the LED light source unit 31 has a substantially rectangular box-like appearance with the bottom surface opened as a light exit, and the plurality of LED light source units 31 are shown in FIGS. As shown in FIG. 2, the ultraviolet LED light source device 30 is configured by being attached to the cooling pipes 22 and 22 so as to be continuous without a gap.
As shown in FIGS. 7 and 8, each LED light source unit 31 includes a rectangular plate-like base plate 33 formed of resin or the like as a base material for assembling components. An LED 36, a lens 41, a reflecting mirror 34, and an auxiliary reflecting mirror 35 are provided on the surface of the base plate 33 (on the bottom surface in the drawing), and a terminal is disposed on the opposite surface. A table 37 and a heat conduction bar 38 are provided.

The LED 36 is a light emitting element that emits ultraviolet rays, and the lens 41 is a light control member that is formed of an ultraviolet resistant material and controls the emitted light of the LED 36.
In this LED light source unit 31, as shown in FIG. 6B and FIG. 6C, a plurality of LEDs 36 are arranged side by side in the longitudinal direction on a strip-shaped LED substrate 42, and these LED substrate 42 and LED 36 are arranged. Thus, a line LED 43 that emits light in a line shape is configured.

  The reflecting mirror 34 condenses the light of the line LED 43 at a predetermined position, and is disposed to face the line LED 43. The reflecting mirror 34 has a columnar shape with a substantially triangular cross section, and a slanted surface (cylindrical) reflecting surface 44 is formed as a light control surface on the inclined surface, and the reflecting surface 44 faces the line LED 43. The bottom surface 45 is fixed to the base plate 33 with screws. The reflective surface 44 is a substantially elliptical reflective surface having two focal points, a first focal point and a second focal point, and the line LED 43 is disposed at the first focal point, and condenses the light of the line LED 43 to the second focal point.

  The lens 41 is a convex lens, and the light emitted from the LED 36 is expanded in accordance with the height of the reflecting surface 44 facing (the length from the base plate 33 to the apex of the reflecting surface 44), whereby the height direction of the reflecting surface 44 is increased. The entire surface of the reflecting surface 44 is effectively used for light control.

As shown in FIG. 7, the LED light source unit 31 includes a plurality of pairs of a reflecting mirror 34 and line LEDs 43 arranged to face the reflecting surface 44 of the reflecting mirror 34 arranged side by side (in parallel) on the base plate 33. Has been.
Specifically, the base plate 33 of the LED light source unit 31 is provided with two sets of the reflecting mirror 34 and the line LED 43 on each side of the center line C of the base plate 33. The reflecting surface 44 of the reflecting mirror 34 is provided in a posture toward the center line C.
As shown in FIG. 9, each of the reflecting surfaces 44 is formed in an elliptical shape with the target point T set on the center line C as a second focal point, whereby the light from each set of line LEDs 43 is transmitted. Collected at a target point T, a linear irradiation field is formed at the target point T.

Here, each set of line LEDs 43 is housed in another set of reflecting mirrors 34.
Specifically, among the reflecting mirrors 34 in each set, those in which the reflecting surface 44 of the other reflecting mirror 34 is disposed facing the back surface 46 side, the line LED 43 is accommodated in the surface of the back surface 46. Yes.
Further, among each pair of reflecting mirrors 34, the ones in which the reflecting surface 44 of the other reflecting mirror 34 faces the reflecting surface 44 are arranged with the line LEDs 43 in the surface of the reflecting surface 44.
As described above, in this LED light source unit 31, each set of line LEDs 43 is housed in the back surface 46 or the reflective surface 44 of any other set of the reflecting mirrors 34. The length of (the direction in which the reflecting mirrors 34 are arranged) is suppressed.

  In this LED light source unit 31, two sets of the line LED 43 and the reflecting mirror 34 are arranged on both sides of the center line C, but three or more sets or one set of the line LED 43 and the reflecting mirror 34 are arranged. You may do it. Further, the number of sets arranged on both sides of the center line C may be varied.

The auxiliary reflecting mirror 35 is a substantially rectangular plate-like plane mirror.
In this LED light source unit 31, as shown in FIG. 6B and FIG. 8, auxiliary reflecting mirrors 35 are arranged at both ends of the reflecting mirror 34 extending in a columnar shape. The pair of auxiliary reflecting mirrors 35 and 35 reflects light toward the target point T in the longitudinal direction of the reflecting mirror 34 (extending direction, front-rear direction of the LED light source unit 31), thereby increasing the irradiation efficiency. ing.

  The terminal block 37 is a terminal member that connects the wiring extending from each of the LEDs 36 and the wiring in the ultraviolet irradiator 10.

  The heat conduction bar 38 is a cooling structure that radiates and cools the line LED 43, transfers the heat of the line LED 43 to the cooling pipe 22, and cools the cooling line 22 by collecting the heat. Specifically, as shown in FIG. 7, the heat conducting bar 38 includes an attachment engaging portion 50, a cooling tube engaging portion 51, and an LED attachment portion 52, which are made of high heat such as aluminum or an alloy. It is integrally formed from a conductive material.

The attachment engaging portion 50 is a rectangular plate-like portion extending in the longitudinal direction of the line LED 43 and is a portion that engages with the base plate 33. The cooling pipe engaging part 51 is a part that is integrally provided on one surface of the mounting engaging part 50 and engages when the cooling pipe 22 is fitted. Further, the LED attachment portion 52 is integrally provided on the other surface of the attachment engagement portion 50, and is a part to which the line LED 43 is attached.
With this configuration, in the heat conduction bar 38, the heat of the line LED 43 is transmitted to the LED mounting portion 52, transmitted to the mounting engaging portion 50 and the cooling pipe engaging portion 51, and collected in the cooling pipe 22. .

The heat conducting bar 38 is inserted and fixed in the plane of the base plate 33.
That is, as shown in FIG. 7, an insertion hole 49 is provided in the surface of the base plate 33, and the heat conduction bar 38 has an insertion hole 49 so that the LED mounting portion 52 is located on the reflecting mirror 34 side. The step provided on the edge of the mounting engagement portion 50 is hooked and locked to the edge of the insertion hole 49. In this state, the cooling pipe engaging portion 51 of the heat conducting bar 38 is fastened to the base plate 33 by the L-shaped metal fitting 48 or the like, and thereby firmly fixed to the base plate 33.

The cooling pipe engaging portion 51 is disposed on the cooling pipe 22 side with respect to the base plate 33, and the cooling pipe 22 is fitted and engaged with the cooling pipe engaging portion 51.
As described above, the cooling pipe 22 has the first tubular body 22A and the second tubular body 22B formed in a tubular shape having a substantially rectangular cross section as shown in FIG. The two groove portions 55 having a U-shaped cross section corresponding to the cross-sectional shapes of the first tube body 22A and the second tube body 22B are provided in parallel, and the first tube body 22A and the second tube portion 55 are provided in the groove portions 55. Two tubes 22B are fitted and stored. A plurality of tubes such as the first tube body 22A and the second tube body 22B are accommodated in and engaged with the cooling tube engaging portion 51, thereby improving the cooling capacity.

  As shown in FIG. 7, a mounting bracket 60 formed of a high thermal conductivity material is fixed to the cooling pipe engaging portion 51 by a fixing screw 59. The mounting bracket 60 functions as a lid that closes the open end of the groove 55, and the cooling pipe 22 extends through the cooling pipe engaging portion 51 by closing the groove 55 by the mounting bracket 60. As a result, the cooling pipe engaging portion 51 is supported by the cooling pipe 22 so as not to drop off. As a result, the LED light source unit 31 is supported by the cooling pipe 22.

  Thus, in the ultraviolet irradiator 10, the cooling tubes 22 and 22 extending in the interior bear both the support and cooling of the LED light source unit 31, so that it is not necessary to provide a separate support member. Further, by supporting the plurality of LED light source units 31 on the cooling tubes 22, 22, the LED light source units 31 can be easily connected and arranged in a line shape along the cooling tubes 22, 22. Is easily obtained.

  By the way, the contact area between each of the first tube body 22A and the second tube body 22B and the groove portion 55 greatly affects the heat recovery efficiency of the cooling tube 22. Therefore, the depth of the groove 55 is the same as or higher than the height of the first tubular body 22A and the second tubular body 22B having a rectangular cross section. Accordingly, the first tubular body 22A and the second tubular body 22B are accommodated in the groove portion 55, so that not only the bottom surface but also the entire side surface comes into contact with the groove portion 55, and the contact area is increased. ing.

  However, the groove size of the groove portion 55 is made larger than the cross-sectional dimensions of the first tube body 22A and the second tube body 22B in consideration of design tolerances. For this reason, the groove portion 55 and the first tube body 22A are formed. As shown in FIG. 7, a gap δ is formed between the peripheral surface of the second tubular body 22B. In order to fill this gap δ and improve the contact between the peripheral surfaces of the first and second tubular bodies 22A and 22B and the groove portion 55, the fitting 60 is inserted so as to fill the gap δ during installation. The plate-like portion 61 that functions as is integrally formed.

  Thereby, the contact property of the circumferential surface of the first tubular body 22A and the second tubular body 22B and the groove portion 55 is enhanced, and the heat recovery efficiency is greatly enhanced. In addition to this, since the gap δ is filled, loosening and unevenness between the groove 55 and the first tube body 22A and the second tube body 22B are suppressed, so that the LED light source unit 31 is connected to the cooling tube 22. Positioning accuracy when supported and fixed is also improved.

  In addition, in order to improve the contact property between the groove portion 55 and the peripheral surfaces of the first tube body 22A and the second tube body 22B, heat conductive grease or the like may be applied to the groove portion 55.

As shown in FIG. 7, the LED attachment portion 52 is a thick plate shape substantially perpendicular to the attachment engagement portion 50 of the heat conducting bar 38 and extends in the longitudinal direction of the line LED 43. The LED substrate 42 of the line LED 43 is fixed with screws, and the lens pressing member 57 that holds the lens 41 of the line LED 43 is fixed with screws.
In addition, the heat conductivity is further enhanced by forming the LED substrate 42 of the line LED 43 with a high heat conductive material and / or interposing a heat conductive agent or a heat conductive sheet between the LED substrate 42 and the LED mounting portion 52. You can also.

Here, in the LED light source unit 31, as described above, the line LED 43 is housed on the back surface 46 of the reflecting mirror 34 and the reflecting surface 44, so as shown in FIG. The part 52 is inserted into the reflecting mirror 34, and the line LED 43 is exposed from the reflecting mirror 34.
Specifically, the reflecting mirror 34 into which the LED mounting portion 52 is inserted is provided at a position that covers the insertion hole 49 of the base plate 33. In the reflecting mirror 34, as shown in FIGS. In addition, a back surface side exposed portion 63 and a reflective surface side exposed portion 64 are provided on the back surface 46 and the reflective surface 44, respectively.
The heat conducting bar 38 is attached to the base plate 33 by inserting the LED mounting portion 52 into the reflecting mirror 34 so that the line LED 43 on the side surface 52A faces the back side exposed portion 63 and the reflecting surface side exposed portion 64. As a result, the line LED 43 is exposed from each of the back side exposed portion 63 and the reflecting surface side exposed portion 64 and is disposed at a predetermined position facing the reflecting surface 44 of the other reflecting mirror 34.

Here, in this structure, the line LED 43 that faces the reflecting surface 44 of the reflecting mirror 34 is provided so as to be housed in another reflecting mirror 34 that faces the reflecting surface 44, so that the width of the LED light source unit 31 is measured. Is suppressed. In addition to this, an effect of improving the light condensing performance at the target point T is obtained.
Hereinafter, these effects will be specifically described.

FIG. 10 is a diagram showing a light source unit E according to a comparative configuration example of the LED light source unit 31.
As shown in the comparative configuration example of FIG. 10, the light source unit E can be configured by arranging a plurality of sets of line LEDs 43 and reflecting mirrors 34 side by side on the base plate 33 independently.
However, in this light source unit E, since the reflecting mirror 34 and the line LED 43 are individually arranged on the base plate 33, the arrangement space S of the line LED 43 is required, and the unit width W of the light source unit E is increased accordingly. There is a problem.

Therefore, for example, if the distance G between the line LED 43 and the reflecting mirror 34 is reduced, the unit width W can be shortened.
However, as the distance G decreases, the size of the light emitting point of the line LED 43 has a greater influence on the light control of the reflecting surface 44 of the reflecting mirror 34, and the accuracy of light control decreases. A new problem arises that the light properties are reduced.

With respect to this problem, the LED light source unit 31 has a configuration in which each group of line LEDs 43 is housed and disposed in another pair of reflecting mirrors 34, so that the arrangement space S of the line LEDs 43 becomes unnecessary. The unit width W can be shortened.
In addition, since the distance G between the reflecting surface 44 of the reflecting mirror 34 and the line LED 43 facing the reflecting surface 44 is not shortened, the accuracy of light control by the reflecting surface 44 is maintained, and the light collecting property at the target point T is maintained. Can be improved.

FIG. 11 is a diagram showing the illuminance distribution at the target point T of the LED light source unit 31 and the light source unit E, FIG. 11 (A) shows the illuminance distribution of the LED light source unit 31, and FIG. Illuminance distribution is shown.
In the light source unit E, as shown in FIG. 11B, the light control by the reflecting surface 44 of the reflecting mirror 34 is not sufficient and the light condensing performance is reduced, so that the light amount is dispersed in a relatively wide range. .
On the other hand, in the LED light source unit 31, as shown in FIG. 11A, the light control by the reflecting surface 44 functions sufficiently to obtain a high light collecting property. Dispersion is suppressed, thereby increasing the peak illuminance.

Here, in the LED light source unit 31, each LED 36 of the line LED 43 is provided with a lens 41, and the lens 41 controls the light of the LED 36 in accordance with the reflective surface 44 of the facing surface. The control is good.
However, in the configuration in which the line LED 43 is accommodated within the reflective surface 44, when the lens 41 protrudes from the reflective surface 44, the light incident on the reflective surface 44 is blocked by the lens 41.
Therefore, when the reflecting surface side exposed portion 64 is provided on the reflecting surface 44 of the reflecting mirror 34, the reflecting surface 44 is configured as follows.

FIG. 12 is an enlarged view showing the configuration of the reflecting surface side exposed portion 64 of the reflecting surface 44.
As shown in this figure, the reflecting surface 44 is a first reflecting surface 44A close to the target point T side (outgoing side) with the line LED 43 exposed to the reflecting surface side exposed portion 64 as a boundary, and the first reflecting surface. The lens 41 of the line LED 43 is arranged on the reflecting surface side exposed portion 64 so as to be divided into the second reflecting surface 44B that passes from the target point T rather than the surface 44A.

  At this time, if the light emitting surface 41 </ b> A is disposed deeper than the reflecting surface 44 in the lens 41, the light emitted through the lens 41 is blocked by the reflecting surface 44. Therefore, as shown in FIG. 12, the second reflecting surface 44 </ b> B of the reflecting surface 44 is formed according to an elliptical surface M <b> 2 passing through the edge portion P <b> 2 of the light emitting surface 41 </ b> A of the lens 41. As a result, the convex light exit surface 41A of the lens 41 protrudes from the second reflection surface 44B, which is an elliptical surface M2, and shielding of the emitted light by the second reflection surface 44B is prevented.

On the other hand, the light ray K1 having an angle inclined toward the target point T with respect to the horizontal direction is incident from the opposing line LED 43 on the first reflecting surface 44A on the emission side, so that the lens 41 is more than the first reflecting surface 44A. When projecting, the light ray K1 having an angle incident on the first reflecting surface 44A from the lens 41 side is thus shielded by the lens 41, leading to a decrease in illuminance at the target point T and a deterioration in light collecting performance.
Therefore, as shown in FIG. 12, the first reflecting surface 44A is formed in accordance with an ellipsoid M1 passing through the apex P1 of the light emitting surface 41A of the lens 41, and the light K1 is not shielded by the lens 41 and is first reflected. The light is incident on the surface 44 </ b> A so that the illuminance reduction and the light condensing performance at the target point T do not occur.

As described above, according to the present embodiment, the LED mounting portion 52 for attaching the line LED 43 and the cooling pipe engaging portion 51 having the groove portion 55 in which the cooling pipe 22 through which the cooling water flows is accommodated are provided. The heat conduction bar 38 is configured to transmit the heat of the LED 43 to the cooling pipe 22 through the LED mounting portion 52 and the cooling pipe engaging portion 51 and collect it in the cooling water.
According to this configuration, since the cooling water is sealed by the cooling pipe 22 and does not leak, the leakage of the cooling water can be prevented and the line LED 43 can be cooled well.

  Further, according to the present embodiment, the cooling pipe engaging portion 51 is provided with the plurality of groove portions 55 with which the first tubular body 22A and the second tubular body 22B included in the cooling pipe 22 are engaged. Thereby, heat recovery occurs in each of the groove portions 55, and the cooling capacity is enhanced.

Further, according to the present embodiment, the open end of the groove portion 55 is closed by the mounting bracket 60, and the LED light source unit 31 including the heat conduction bar 38 is supported by the cooling pipe 22 so as not to drop off.
Thereby, the support structure for supporting the LED light source unit 31 on the ultraviolet irradiator 10 can be simplified, and by supporting a plurality of LED light source units 31 along the cooling tube 22, these LED light sources can be provided. The ultraviolet LED light source device 30 to which the units 31 are connected can be easily configured.

  Further, according to the present embodiment, the mounting bracket 60 that closes the open end of the groove 55 includes the plate-like portion 61 that functions as a spacer that fills the gap δ between the groove 55 and the cooling pipe 22. Contactability is enhanced and cooling performance is improved. In addition, backlash of each of the plurality of LED light source units 31 supported by the cooling tube 22 is suppressed.

Further, according to the present embodiment, the heat conducting bar 38 includes the mounting engagement portion 50 that engages with the base plate 33 to which the reflecting mirror 34 is assembled, and the line LED 43 is formed by the engagement of the base plate 33 and the mounting engagement portion 50. Is arranged at a predetermined position with respect to the reflecting mirror 34.
As a result, the line LED 43 serving as the light source is positioned simply by assembling the heat conducting bar 38 to the base plate 33, and therefore the assembly work of the LED light source unit 31 is facilitated.

  Further, according to the present embodiment, since the heat conduction bar 38 is formed of a material having a higher thermal conductivity than the base plate 33, heat conduction from the heat conduction bar 38 to the base plate 33 can be suppressed. The thermal influence on other optical fixtures such as the reflecting mirror 34 assembled to the base plate 33 can be suppressed.

Further, according to the present embodiment, in the LED light source unit 31 in which a plurality of sets of the reflecting mirror 34 and the line LED 43 arranged to face the reflecting surface 44 of the reflecting mirror 34 are provided side by side, the pair with the reflecting mirror 34 is provided. The line LED 43 formed is housed in another set of reflecting mirrors 34 facing the reflecting surface 44 of the reflecting mirror 34.
With this configuration, in each pair of the reflecting mirror 34 and the line LED 43, the distance G between the reflecting mirror 34 and the line LED 43 is not shortened, and the unit in the side-by-side direction of each pair is equal to the arrangement space S of the line LED 43. The width W can be shortened, and the LED light source unit 31 can be downsized.

Further, according to the present embodiment, the reflecting surfaces 44 of the two pairs of reflecting mirrors 34 face each other, and the line LED 43 is housed in each of the facing reflecting surfaces 44.
According to this configuration, the two sets of reflecting mirrors 34 and the line LEDs 43 are arranged so that the reflecting surfaces 44 of the reflecting mirrors 34 of each set face each other, so that the common target point T set between both sets Irradiation is easy.

  Further, according to the present embodiment, each of the line LEDs 43 is provided with the lens 41 that distributes light in accordance with the opposing reflecting surface 44, so that the reflecting surface 44 is effectively used for light control.

Further, according to the present embodiment, the lens 41 includes the first reflecting surface 44A close to the emitting side with the lens 41 as a boundary, and the first reflecting surface 44A close to the emitting side with the lens 41 as the first reflecting surface 44A. The first reflecting surface 44A is provided in accordance with the elliptical surface M1 passing through the vertex P1 of the light emitting surface 41A of the lens 41, and is divided into a second reflecting surface 44B farther from the emitting side than the reflecting surface 44A. The reflection surface 44B is configured to be provided in accordance with the elliptical surface M2 passing through the edge portion P2 of the light emission surface 41A of the lens 41.
According to this configuration, light incident from the light-emitting surface 41A of the lens 41 is prevented from being blocked by the second reflecting surface 44B, and light incident on the first reflecting surface 44A from the line LED 43 on the opposite side is lens. It can suppress that 41 is shielded, and the utilization efficiency of the light in the LED light source unit 31 is improved.

According to the present embodiment, each of the plurality of LED light source units 31 is connected in a direction orthogonal to the horizontal direction of the set of the reflecting mirror 34 and the line LED 43 to constitute the ultraviolet LED light source device 30.
According to this configuration, a high-quality line light source can be obtained by the LED light source unit 31 in which high-precision light control is performed.

  It should be noted that the above-described embodiments are merely illustrative of one embodiment of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

For example, in the above-described embodiment, the light emitting element is not limited to the LED 36, and any light emitting element can be used.
For example, the curved surface of the reflecting surface 43 of the reflecting mirror 34 is not limited to an elliptical surface, and a curved surface corresponding to a desired irradiation field and light distribution is used.

In the above-described embodiment, the heat conduction bar 38 is provided with the two groove portions 55 so that the first tubular body 22A and the second tubular body 22B are separated from each other, but the present invention is not limited thereto.
That is, as in the LED light source unit 131 shown in FIG. 13, the cooling tube engaging portion 151 of the heat conducting bar 138 is provided with a groove portion 155 having a depth in which the first tubular body 22A and the second tubular body 22B are overlapped, In this groove portion 155, the first tubular body 22A and the second tubular body 22B serving as the forward path and the backward path of the cooling water circulation path may be stacked. Although omitted in FIG. 13, a gap δ is provided between the first tubular body 22 </ b> A, the second tubular body 22 </ b> B, and the groove portion 155 in the same manner as in the above-described embodiment. The plate-like part 61 functioning as is inserted.

30 UV LED light source device (light source device)
31, 131 LED light source unit (light source unit)
34 Reflector (optical component)
36 LED (light emitting device)
41 Lens (light control member)
41A Light emitting surface 44 Reflecting surface 43 Line LED
44A 1st reflective surface 44B 2nd reflective surface 63 Back surface side exposed part 64 Reflective surface side exposed part C Center line G Distance M1, M2 Ellipsoidal surface (curved surface)
P1 vertex P2 edge S placement space T target point W unit width

Claims (2)

In a light source unit provided side by side with a plurality of sets of a reflecting mirror and a light emitting element disposed opposite to the reflecting surface of the reflecting mirror,
The reflecting surfaces of the two reflecting mirrors face each other, and the light emitting element is housed in each of the opposing reflecting surfaces,
Each of the reflecting surfaces condenses the light of the light emitting element at the same target point,
Each of the light emitting elements is provided with a light control member that distributes light in accordance with the opposing reflecting surface,
The light control member is a lens whose light exit surface is convex.
The reflective surface has a curved surface with a predetermined curvature,
The light-emitting element and the reflection surface that houses the lens are divided into a first reflection surface that is closer to the emission side and a second reflection surface that is farther from the emission side than the first reflection surface, with the lens as a boundary.
The first reflecting surface is provided in accordance with the curved surface passing through the apex of the light emitting surface of the lens,
The light source unit, wherein the second reflecting surface is provided in accordance with the curved surface passing through an edge portion of the light emitting surface of the lens . A plurality of light source units according to claim 1 ,
Each of the said light source units is arrange | positioned in the direction orthogonal to the horizontal direction of the said group. The light source device characterized by the above-mentioned.

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