JP2017027789A - Led luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED luminaire which can reduce cost with a simple constitution, in which light emission can reach a distant place, and which enables light distribution in a long region along one direction.SOLUTION: An LED luminaire which is mounted on a ceiling in a high place includes: a plurality of LED elements 10; and cylindrical reflectors 12 provided corresponding to the plurality of LED elements 10 respectively, having an incident side opening 13 of the light emitted from the LED elements 10 and an emission side opening 14 which is further enlarged than the incident side opening 13 in a plan view, and in which an inner surface is formed on a reflection surface. In an opening edge 14s for forming the emission side opening 14, width Win a first direction Dis larger than width Win a second direction Dorthogonal to the first direction D.SELECTED DRAWING: Figure 3

Description

  The present disclosure mainly relates to an LED lighting device attached to a high place of a building.

  2. Description of the Related Art In recent years, LED lighting devices using LED (Light Emitting Diode) elements, which are excellent in power saving, as light sources have become widespread due to increasing environmental awareness. As a kind of LED lighting device, there is known a lighting device for a high ceiling that is attached to a high ceiling such as a multipurpose hall or a large warehouse and irradiates an irradiated surface such as a floor surface below.

  For example, Patent Document 1 discloses an LED element, a cylindrical reflector having an incident side opening and a light exit side opening of light emitted from the LED element, and a cylindrical reflector having a cylindrical inner wall formed on a reflecting surface; , A lighting device is disclosed.

  Patent Document 2 discloses an illumination device having an LED element, a condensing lens, and an anisotropic diffusion sheet in order to illuminate a long region along one direction.

JP 2013-004168 A JP 2014-229476 A

  In order to illuminate a corridor or a passage, it is necessary to illuminate an elongated region along the longitudinal direction of the corridor centered directly below the appliance, not a perfect circle region centered directly below the appliance.

  Furthermore, since the lighting device for high ceilings is attached to a high place such as 4.5 m to 6.0 m from the floor, for example, in order to secure an appropriate illuminance on the floor surface, light emitted from the LED element is used. Need to reach far away.

  In order to illuminate a long region along one direction, it is conceivable to use a condensing lens and a diffusion sheet as described in Patent Document 2. However, there is a possibility that the cost increases and the light spreads too much to ensure sufficient illumination on the floor.

  On the other hand, in order to ensure sufficient illuminance on the floor surface, it is conceivable to use a cylindrical reflector as described in Patent Document 1. However, Patent Document 1 does not clearly disclose a technique for distributing light to a long region along one direction using only a cylindrical reflector.

  The present disclosure has been made paying attention to such a problem, and its purpose is to reduce the cost with a simple configuration, to allow light emission to reach far and to distribute light over a long area along one direction. LED lighting device is provided.

  In order to achieve the above object, the present disclosure takes the following measures.

That is, the LED lighting device of the present disclosure is
A lighting device attached to a ceiling in a high place,
A plurality of LED elements;
Provided corresponding to each of the plurality of LED elements, and having an incident side opening of light emitted from the LED element and an exit side opening that is wider than the incident side opening in plan view, and an inner surface is a reflective surface A cylindrical reflector formed on,
The opening edge forming the emission side opening has a width in the first direction larger than a width in the second direction orthogonal to the first direction.

  Thus, since the opening edge which forms the output side opening of the cylindrical reflector is formed to have a width in the first direction larger than the width in the second direction, the light exiting the output side opening is second The light spreads in the first direction rather than the direction and is distributed in a region that is long in one direction. Nevertheless, if it is a cylindrical reflector, light does not spread too much compared to the diffusion sheet, and the emitted light can reach far away. Furthermore, since the light distribution spreading long in one direction can be realized with only the cylindrical reflector, the cost can be suppressed without using other members such as a condenser lens.

The perspective view which shows the LED lighting apparatus of 1st Embodiment. The disassembled perspective view which shows the structure of a LED lighting apparatus. The bottom view which shows LED lighting apparatus. AA site | part sectional drawing of FIG. BB site | part sectional drawing of FIG. The AA site | part cross-section perspective view of FIG. The bottom view which shows the LED lighting apparatus of 2nd Embodiment. CC sectional drawing of FIG. DD sectional drawing of FIG. The perspective view which shows the LED lighting apparatus of 3rd Embodiment. The bottom view which shows LED lighting apparatus. Sectional drawing which shows the EE site | part and FF site | part of FIG.

<First Embodiment>
Hereinafter, the LED lighting device according to the first embodiment of the present disclosure will be described with reference to FIGS. 1, 2, 3, 4 </ b> A, and 4 </ b> B. When the lighting device is attached to the ceiling, the ceiling side may be described as an upper UD, and the floor side may be described as a lower LD of the lighting device.

  As shown in FIG. 2, the light source units 1A and 1B having a plurality of LED elements 10, the power supply unit 2 for supplying power to the LED elements 10, the frame main body 30 to which the light source units 1A and 1B are attached, the ceiling, etc. An attachment member 31 for attaching the frame main body 30 to the attachment surface, a translucent cover 4 that covers the LED element 10, and a cover frame 32 that covers the light source units 1 </ b> A and 1 </ b> B and the power supply unit 2 together with the frame main body 30. The cover frame 32 has a rectangular opening 32 h that exposes the translucent cover 4. The light emitted from the LED element 10 passes through the translucent cover 4 and the opening 32h of the cover frame 32 and reaches the irradiated surface. Only the cylindrical reflector 12 and the translucent cover 4 exist in the light path from the LED element 10 to the irradiated surface. For the convenience of illustration, the translucent cover 4 is not shown in the drawings other than FIG.

  In the present embodiment, as shown in FIG. 3, the two light source units 1 </ b> A and 1 </ b> B are arranged at an interval in a plan view when the upper UD is viewed from the lower LD. A power supply unit 2 is disposed between the two light source units 1A and 1B. Thus, when viewed along the vertical direction, the light source units 1A and 1B and the power supply unit 2 do not overlap, so that the heat dissipation effect of the light source unit is improved. As shown in FIG. 2, the two light source units 1 </ b> A and 1 </ b> B and the power supply unit 2 are fixed to the frame body 30. The frame body 30 has a pair of upstanding pieces 30a formed at the ends. The attachment member 31 is U-shaped in a side view and is screwed to the pair of upright pieces 30a. As long as the LED lighting device is attached in a posture facing downward, the LED lighting device may face directly below or obliquely downward.

As shown in FIG. 2, the light source units 1 </ b> A and 1 </ b> B include a plurality of LED (Light Emitting Diode) elements 10, a heat dissipation member 11 to which the plurality of LED elements 10 are attached, and a plurality of LED elements 10. And a cylindrical reflector 12 provided correspondingly. The heat radiating member 11 is formed of a metal member having heat conductivity such as aluminum, and includes a flat element mounting surface 11a to which the LED element is mounted and a heat radiating fin 11b standing on the back side of the element mounting surface 11a. The element mounting surface 11a and the radiation fin 11b are integrally formed on the same member. In the present embodiment, four LED elements 10 are provided. The LED element 10 is a high power LED whose power consumption per one is 0.8 W or more and 2 W or less . Of course, the number of LED elements 10 and the power consumption of one element can be changed as appropriate. For example, the power consumption of one element is preferably 1 W.

  As shown in FIG. 2, the LED element 10 is mounted in a state in which the heat generated in the element 10 is in surface contact with the element mounting surface 11a so as to be able to transfer heat. In the present embodiment, the LED element 10 is fixed to the element mounting surface 11a with a fastener such as a screw, but the fixing method is not limited to this. The plurality of LED elements 10 are arranged at regular intervals in a row corresponding to the cylindrical reflector 12. As shown in FIGS. 2 and 3, the plurality of LED elements 10 are mounted such that the center of each light emitting surface is on the center line in the width direction of the element mounting surface 11a (for example, the AA auxiliary line in FIG. 3). It has been. Of course, the arrangement of the LED elements 10 is not limited to this, and can be variously changed.

  The cylindrical reflector 12 has an inner surface formed as a reflecting surface, and has an incident side opening 13 for light emitted from the LED element 10 and an output side opening 14 that is wider than the incident side opening 13 in plan view. As shown in FIGS. 4A and 4C, the reflecting surface is formed as a rotating paraboloid, and a rotation axis ax and a focal point fp are set. The opening edge 14s forming the emission side opening 14 is formed on the same plane sf. In the present embodiment, the center of the light emitting surface of the LED element 10 and the focal point fp of the rotary paraboloid coincide, but the present invention is not limited to this. For example, the center of the light emitting surface of the LED element 10 and the focal point fp of the rotary paraboloid do not need to coincide.

As shown in FIG. 3, the opening edge 14s forming the exit-side opening 14, the width _{W 1} of the first direction _{D 1} is larger than the width _{W 2} in the second direction _{D 2} perpendicular to the first direction _{D 1} . This is because, as shown in FIGS. 4A and 4C, the rotation axis ax of the paraboloid is inclined with respect to the perpendicular pl of the plane sf passing through the opening edge 14s. In the present embodiment, the shape of the opening edge 14s is an elliptical shape. In addition, although a reflective surface is a paraboloid, it is not limited to this, A taper-shaped flat surface may be sufficient.

As shown in FIG. 3, first to fourth cylindrical reflector that constitutes the first light source unit 1A (12A~D) are arranged in a row along the first straight line L ₁ in plan view. The first direction _{D 1} of the respective tubular reflector (12A-12D) matches the column direction CD. As shown in FIGS. 3, 4A and 4C, the rotation axis ax of the first to fourth cylindrical reflectors (12A to 12D) is such that the emission side opening 14 faces one CD1 in the column direction CD in plan view. Further, it is inclined with respect to the element mounting surface 11a (that is, with respect to the perpendicular pl of the plane sf). The inclination angles (θ _A , θ _B , θ _C , θ _D ) of the first to fourth cylindrical reflectors (12A to 12D) are 5 degrees, 10 degrees, 20 degrees, and 20 degrees, respectively. That is, at least two cylindrical reflectors among the first to third cylindrical reflectors (12A to 12C) have a central axis (rotation axis ax) connecting the center of the incident side opening 13 and the center of the emission side opening 14. Is set non-parallel. Similarly, at least two cylindrical reflectors are arranged such that the inclination angle of the central axis increases from the counter-inclined side CD2 to the inclined side CD1 in the column direction in plan view.

  The cylindrical reflector 12D located closest to the tilted side CD1 in the column direction CD and the cylindrical reflector 12C adjacent to the cylindrical reflector 12D have the same inclination angle of the central axis. A plurality of cylindrical reflectors having the largest inclination angle are provided adjacent to each other in the column direction. According to this configuration, by providing a plurality of cylindrical reflectors (for example, 12C and 12D) having an inclination angle that illuminates the farthest distance, it is possible to appropriately secure the farthest illuminance due to the reinforcing effect. Of course, not only the maximum inclination angle but also a plurality of cylindrical reflectors having a predetermined inclination angle may be provided. Then, it becomes possible to illuminate a specific point brightly.

  As shown in FIGS. 4A and 4C, the first to fourth cylindrical reflectors (12 </ b> A to 12 </ b> D) are connected together by the connecting plate 15 at the opening edges 14 s forming the emission side opening 14, and are integrated with the connecting plate 15. Is formed. The first to fourth cylindrical reflectors (12A to 12D) are preferably made of resin. In the present embodiment, the plurality of cylindrical reflectors 12 arranged in a row are integrally formed, but may be formed individually and mounted on the element mounting surface 11a.

As shown in FIG. 3, a 5-8 cylindrical reflector that constitutes the second light source unit 1B (12e to 12h) are arranged in a row along the second straight line _{L 2} in plan view. The first direction _{D 1} of the respective tubular reflector (12e to 12h) matches the column direction CD. First straight line _{L 1} and the second straight line _{L 2} are parallel. As shown in FIGS. 3 and 4B, the rotation axis ax of the fifth to eighth cylindrical reflectors (12E to 12H) is such that the emission side opening 14 faces the other CD2 in the column direction CD in plan view. It is inclined with respect to the mounting surface 11a (that is, with respect to the perpendicular pl of the plane sf). The inclination angles (θ _E , θ _F , θ _G , θ _H ) of the fifth to eighth cylindrical reflectors (12E to 12H) are 5 degrees, 10 degrees, 20 degrees, and 20 degrees, respectively. That is, in at least two cylindrical reflectors among the fifth to seventh cylindrical reflectors (12E to 12G), the central axis connecting the center of the incident side opening 13 and the center of the emission side opening 14 is set to be non-parallel. Has been. Similarly, at least two cylindrical reflectors are arranged so that the inclination angle of the central axis increases from the counter-inclined side CD1 toward the inclined side CD2 in the column direction CD in plan view.

  As shown in FIG. 4B, the fifth to eighth cylindrical reflectors (12 </ b> E to 12 </ b> H) are formed integrally with the connection plate 15, with the opening edges 14 s forming the emission side opening 14 being connected to each other by the connection plate 15. ing. The fifth to eighth cylindrical reflectors are preferably made of resin.

As shown in FIG. 3, the first light source unit 1A comprises at least two tubular reflector (12A-12D) comprises a first group G1 which is disposed in a row along a first straight line L ₁ in plan view . The second light source unit 1B comprises at least two tubular reflector (12e to 12h) is a second group G2 arranged in a row along a second straight line _{L 2} parallel to the first straight line _{L 1} in plan view Have. When viewed along a direction orthogonal to the column direction CD, the cylindrical reflectors (12A to 12D) constituting the first group G1 and the cylindrical reflectors (12E to 12H) constituting the second group G2 are: At least a portion is arranged at an overlapping position. The cylindrical reflectors (12A to 12D) constituting the first group G1 face one of the column directions CD in the direction CD1. The cylindrical reflectors (12E to 12H) constituting the second group G2 face the other CD2 in the column direction.

  Thus, since the first group G1 and the second group G2 overlap each other when viewed from the direction orthogonal to the column direction CD, the dimension in the column direction CD can be suppressed. In addition, since the first group G1 illuminates one CD1 in the column direction CD and the second group G2 illuminates the other CD2 in the column direction CD, it is possible to sufficiently secure the illuminance on both sides in the column direction CD.

  In the present embodiment, the shape of the opening edge 14s is an elliptical shape, but is not limited thereto. For example, a rectangle or a rhombus may be used.

Second Embodiment
The LED lighting device of 2nd Embodiment is demonstrated using FIGS. The LED lighting device of the second embodiment is different from the first embodiment in the structure of the cylindrical reflector 12 of the second light source unit 1B.

As shown in FIGS. 5, 6A and 6B,, the first light source unit 1A, at least two tubular reflector (12A-12D) are arranged in a row along a first straight line _{L 1} in plan view The first group G1. The second light source unit 1B comprises at least two tubular reflector (12e to 12h) is a second group G2 arranged in a row along a second straight line _{L 2} parallel to the first straight line _{L 1} in plan view Have. When viewed along a direction orthogonal to the column direction CD, the cylindrical reflectors (12A to 12D) constituting the first group G1 and the cylindrical reflectors (12E to 12H) constituting the second group G2 are: At least a portion is arranged at an overlapping position. The cylindrical reflectors (12A to 12D) that constitute the first group G1 and the cylindrical reflectors (12E to 12H) that constitute the second group G2 all face either CD1 in the column direction CD.

  As shown in FIGS. 6A and 6B, the inclination angles of the respective cylindrical reflectors 12 constituting the first light source unit 1A and the second light source unit 1B are the same as those of the first light source unit 1A of the first embodiment. .

  Thus, since the first group G1 and the second group G2 overlap each other when viewed from the direction orthogonal to the column direction CD, the dimension in the column direction CD can be suppressed. In addition, since both the first group G1 and the second group G2 illuminate one CD1 in the column direction CD, they are suitable for being placed at the end of the hallway.

<Third Embodiment>
The LED lighting apparatus of 3rd Embodiment is demonstrated using FIGS. As shown in FIGS. 7 to 9, the LED lighting device of the third embodiment includes the first light source unit 1 </ b> A and the second light source unit 1 </ b> B of the second embodiment as one set, and arranges two sets along the column direction. The second set is such that the light source units 1A, 1B of the first set K1 face one of the row directions CD1 and the light source units 1A, 1B of the second set K2 face the other one of the row directions CD2. Two devices of the form are connected.

As described above, the LED lighting devices of the first to third embodiments are
A lighting device attached to a ceiling in a high place,
A plurality of LED elements 10;
Provided corresponding to each of the plurality of LED elements 10, having an incident side opening 13 for light emitted from the LED element 10 and an exit side opening 14 that is wider than the incident side opening 13 in plan view, and the inner surface is A cylindrical reflector 12 formed on the reflecting surface.
Opening edge 14s forming the exit-side opening 14, the width _{W 1} of the first direction _{D 1} is larger than the width _{W 2} in the second direction _{D 2} perpendicular to the first direction _{D 1.}

Thus, the opening edge 14s forming the exit-side opening 14 of the tubular reflector 12, so than the width W ₂ in the second direction D ₂ is the width W ₁ of the first direction D ₁ is larger, light exiting the exit-side opening 14, than the second direction D ₂ is light distribution in the region longer in a direction spreading in the first direction D _1. Nevertheless, if the cylindrical reflector 12 is used, light does not spread too much compared to the diffusion sheet, and light emission can reach far away. Furthermore, since the light distribution spreading long in one direction can be realized with only the cylindrical reflector 12, the cost can be suppressed without using other members such as a condenser lens.

In the first to third embodiments, the at least two tubular reflector (eg 12A, 12B, 12C) are arranged in a row in plan view, the first direction _{D 1} of the each match in the column direction CD The central axis connecting the center of the incident side opening 13 and the center of the emission side opening 14 is set to be non-parallel.

According to this arrangement, since the tubular reflector 12 is the first direction D ₁ of the and each arranged in a row in a plan view is coincident with the column direction CD, is one of the tubular reflector (eg 12A) is irradiated Since an overlap occurs between a region to be irradiated and a region irradiated with another cylindrical reflector (for example, 12B), sufficient illuminance can be ensured.

When the central axis of the cylindrical reflector 12 is along the vertical direction, it irradiates directly below, and it is difficult for light to be distributed to the elongated region. On the other hand, when the central axis of the cylindrical reflector 12 intersects with the vertical direction, light is emitted obliquely downward, and light is easily distributed to a long region along one direction. Two cylindrical reflector (e.g. 12A, 12B) to the first direction D ₁ is coincident if the central axis of a non-parallel, even if one of the tubular reflector is directed beneath the other tubular reflector will be oriented obliquely downward along the first direction D _1. Therefore, it becomes easy to ensure the illuminance in an elongated area along the first direction D _1.

  In the first to third embodiments, at least two cylindrical reflectors (for example, 12A, 12B, and 12C) are inclined so that the emission side opening 14 faces one of the column directions CD in a plan view. .

  According to this configuration, when the row direction CD is aligned with the longitudinal direction of the hallway, the plurality of cylindrical reflectors 12 are arranged along the hallway, and each cylindrical reflector 12 has one of the longitudinal directions of the hallway. Since it will face, lighting suitable for the hallway becomes possible.

  In the first to third embodiments, at least two cylindrical reflectors (for example, 12A, 12B, and 12C) are inclined with respect to the central axis from the anti-inclined side CD2 toward the inclined side CD1 in the column direction CD in plan view. Is arranged to be large.

  According to this configuration, since the inclination angle of the central axis of the cylindrical reflector located on the inclined side CD1 in the column direction CD in plan view is large, both the far side of the inclined side CD1 and the near field of the anti-inclined side CD2 can be obtained. Can illuminate.

  In the first to third embodiments, at least two cylindrical reflectors (for example, 12A, 12B, 12C, and 12D) have the opening edge 14s formed flush with each other, and the opening edge 14s that forms the emission side opening 14 is formed. They are connected by a connecting plate 15.

  According to this configuration, since the opening edge 14 s forming the emission side opening 14 of the cylindrical reflector 12 is flush, there is no light shielding due to the difference in height between the adjacent cylindrical reflectors 12, and the plurality of cylindrical reflectors 12. Can be placed properly. Moreover, it is also possible to make the height of the some cylindrical reflector 12 uniform, and an assembly | attachment becomes easy. Furthermore, since the opening edges 14s forming the emission side opening 14 are connected to each other by the connecting plate 15, molding and assembly are facilitated.

In the first embodiment, at least two tubular reflector (12A-12D) includes a first group G1 which is disposed in a row along a first straight line L ₁ in plan view, at least two tubular reflector ( 12e to 12h) includes a second group G2 arranged in a row along a second straight line parallel to the first straight line _{L 1} in plan view _{L 2,} a. When viewed along a direction orthogonal to the column direction CD, the cylindrical reflectors (12A to 12D) constituting the first group G1 and the cylindrical reflectors (12E to 12H) constituting the second group G2 are: At least a portion is arranged at an overlapping position. The cylindrical reflectors (12A to 12D) constituting the first group G1 face one of the column directions CD1 and the cylindrical reflectors (12E to 12H) constituting the second group are arranged in the column direction. One of the CDs faces the other CD2.

  According to this configuration, the first group G1 and the second group G2 overlap each other when viewed from the direction orthogonal to the column direction CD, so that the dimension in the column direction CD can be suppressed. In addition, since the first group G1 illuminates one CD1 in the column direction CD and the second group G2 illuminates the other CD2 in the column direction CD, it is possible to sufficiently secure the illuminance on both sides in the column direction CD.

In the second embodiment, at least two tubular reflector (12A-12D) includes a first group G1 which is disposed in a row along a first straight line L ₁ in plan view, at least two tubular reflector ( 12e to 12h) includes a second group G2 arranged in a row along a second straight line parallel to the first straight line _{L 1} in plan view _{L 2,} a. When viewed along a direction orthogonal to the column direction CD, the cylindrical reflectors (12A to 12D) constituting the first group G1 and the cylindrical reflectors (12E to 12H) constituting the second group G2 are: It is arranged at a position where some overlap. The cylindrical reflectors (12A to 12H) constituting the first group G1 and the second group G2 are all directed to one of the column directions CD.

  According to this configuration, the first group G1 and the second group G2 overlap each other when viewed from the direction orthogonal to the column direction CD, so that the dimension in the column direction CD can be suppressed. In addition, since both the first group G1 and the second group G2 illuminate one CD1 in the column direction CD, they are suitable for being placed at the end of the hallway.

  The present disclosure is not limited to the embodiment described above. The structure employed in each of the above embodiments can be employed in any other embodiment. The specific configuration of each unit is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the spirit of the present disclosure.

  For example, in the above embodiment, the center of the light emitting surface of the LED element 10 coincides with the focal point fp of the cylindrical reflector 12, but it does not need to coincide.

  Moreover, in the said embodiment, although the one LED element 10 is provided corresponding to one cylindrical reflector, even if the several LED element 10 is provided corresponding to one cylindrical reflector, it is. Good.

In the above-described embodiment, the longitudinal directions (first directions D ₁ ) of the respective cylindrical reflectors 12 are all matched, but may not be matched.

10 ... LED element 12 ... tubular reflector 13 ... entrance-side opening 14 ... exit-side opening 14s ... opening edge 15 ... coupling plate D 1 _... first direction D 2 _... second direction CD ... column G1 ... first group G2 ... Second group

Claims (7)

A lighting device attached to a ceiling in a high place,
A plurality of LED elements;
Provided corresponding to each of the plurality of LED elements, and having an incident side opening of light emitted from the LED element and an exit side opening that is wider than the incident side opening in plan view, and an inner surface is a reflective surface A cylindrical reflector formed on,
The opening edge which forms the said output side opening is an LED illuminating device whose width | variety of a 1st direction is larger than the width | variety of the 2nd direction orthogonal to the said 1st direction.   At least two of the cylindrical reflectors are arranged in a line in plan view, and each of the first directions coincides with the column direction, and connects the center of the incident side opening and the center of the output side opening. The LED lighting device according to claim 1, wherein the central axis is set non-parallel.   The LED lighting device according to claim 2, wherein at least two of the cylindrical reflectors are inclined such that the emission side opening faces one of the column directions in a plan view.   4. The LED illumination according to claim 3, wherein at least two of the cylindrical reflectors are arranged such that an inclination angle of the central axis increases in a row direction from an anti-inclined side toward an inclined side in a column view. apparatus.   At least two of the cylindrical reflectors have the opening edge formed flush with each other, and the opening edges forming the emission side opening are connected by a connecting plate. LED lighting apparatus of description. A first group in which at least two cylindrical reflectors are arranged in a line along a first straight line in plan view;
At least two of the cylindrical reflectors, arranged in a line along a second straight line parallel to the first straight line in plan view, and
When viewed along a direction orthogonal to the column direction, the cylindrical reflector constituting the first group and the cylindrical reflector constituting the second group are arranged at positions where at least a part thereof overlaps. ,
The cylindrical reflector constituting the first group faces one of the row directions, and the cylindrical reflector constituting the second group faces the other of the row directions, The LED lighting device according to claim 1. A first group in which at least two cylindrical reflectors are arranged in a line along a first straight line in plan view;
At least two of the cylindrical reflectors, arranged in a line along a second straight line parallel to the first straight line in plan view, and
When viewed along a direction orthogonal to the column direction, the cylindrical reflector constituting the first group and the cylindrical reflector constituting the second group are arranged at a part of the overlapping position,
The LED lighting device according to any one of claims 1 to 5, wherein each of the cylindrical reflectors constituting the first group and the second group faces one of the row directions.