JP2020027697A - Illumination device - Google Patents

Abstract

To irradiate with a light so as to suppress glare in a horizontal direction, and irradiate with a light in a wide angle range in a vertical direction, thereby achieving space illumination desirable for stadium illumination.SOLUTION: An illumination device 1 includes a reflection body 52 for reflecting a light of a light source part 51, and the reflection body 52 includes a plurality of reflection mirrors 56 having a reflection surface 56A consisting of a paraboloidal surface or an elliptical reflecting surface. The reflection mirrors 56 are continuously connected in a vertical direction in a state that parts of the reflection surfaces 56A are overlapped with each other, and through the overlapped place (cutout part 56K), a light on a wide angle side of the light source part 51 which is incident on the reflection surface 56A in a horizontal direction is caused to be emitted directly in a vertical direction.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a lighting fixture.

2. Description of the Related Art A lighting fixture includes a floodlight unit supported by a pedestal installed in a stadium, and a stadium floodlight that illuminates a stadium with the floodlight unit (for example, Patent Document 1) is known. In this type of light projecting unit, a reflective light projecting unit that reflects light from a light source with a reflecting mirror is used.
In a reflection type lighting device, a lighting device for a vehicle (for example, Patent Document 2) in which an inner wall surface of a storage recess configured to store a plurality of LEDs arranged in a horizontal direction is a reflection surface, or a plurality of LEDs are arranged in a horizontal direction. A light source device for defect inspection in which a part of adjacent reflectors are arranged and overlapped with each other (for example, Patent Document 3) is disclosed.

JP 2012-00280 A Japanese Patent Publication No. 03-006603 JP 2009-110828 A

By the way, it is desired that a stadium projector that illuminates a stadium irradiates light in a wide angle range in a vertical direction.
However, with the configurations described in Patent Documents 2 and 3, it is difficult to expand the light distribution range in the vertical direction. In addition, since the configurations of Patent Documents 2 and 3 irradiate light in a wide range in the horizontal direction, if they are applied to a stadium floodlight as it is, light from light sources arranged side by side in the floodlight overlaps, and the stadium extends horizontally in the stadium. This may cause a moving person (for example, a baseball player or a land-based player) to be recognized as glare.

  The present invention has been made in view of the above circumstances, and irradiates light in a horizontal direction so as to suppress glare, irradiates light in a wide angle range in a vertical direction, and is suitable for stadium lighting. The purpose is to enable.

  In order to achieve the above object, the present invention relates to a lighting fixture that includes a light source unit having a light source unit and a reflector that reflects light from the light source unit, and projects light of the light projection unit into an illumination space. The reflector has a plurality of reflecting mirrors each having a reflecting surface composed of a paraboloid or an elliptical reflecting surface, and each reflecting mirror is connected vertically in a state where a part of each reflecting surface is overlapped with each other. Then, the light on the wide-angle side of the light source unit, which is incident on the reflection surface in the horizontal direction through the overlapped portion, is directly emitted in the vertical direction.

  Further, in the above-mentioned lighting equipment, the light source unit has a light source for each of the reflecting mirrors.

  Further, in the above-mentioned lighting equipment, the reflection surface is a reflection surface that makes the light of the light source a narrow-angle light distribution.

  Further, in the lighting device, a plurality of light source units each including the reflector and the light source unit are arranged at least in a horizontal direction.

  Further, in the above-mentioned lighting equipment, a plurality of the light source units are arranged in a vertical direction.

  Further, in the lighting device, the lighting device further includes a front member that is provided on a front side that is a light emission side of the light projection unit, and that receives a part of vertical light emitted from the light projection unit and reflects in a predetermined direction. It is characterized by the following.

  According to the present invention, it is possible to irradiate light in a horizontal direction so as to suppress glare and irradiate light in a wide angle range in a vertical direction, thereby enabling spatial illumination suitable for stadium illumination.

It is a left view of the lighting fixture concerning embodiment of this invention. It is a right view of a lighting fixture. It is a front view of a lighting fixture. It is a bottom view of a lighting fixture. It is a side view which shows the case of a light projection unit with a front cover. FIG. 4 is an exploded perspective view showing an example of a connection structure between a case and an arm of the upper light emitting unit. It is a perspective view which shows the back side of an angle display plate with a peripheral structure. It is the figure which adjusted each light projecting unit downward. It is the figure which looked at the light projection unit from the front with an optical system. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a left side view of a lighting fixture 1 according to an embodiment of the present invention. 2 is a right side view of the lighting apparatus 1, FIG. 3 is a front view, and FIG. 4 is a bottom view. In the following description, the directions of up, down, left, right, front and rear are directions based on the lighting fixture 1. In addition, in the drawing, the symbol FR indicates a forward direction, the symbol UP indicates an upward direction, and the symbol RH indicates a right direction.

  This lighting fixture 1 is attached to a pedestal (also called a steel tower or a lighting tower) installed in a stadium such as a baseball stadium or a stadium, and emits light obliquely downward from above the spectator seat to the area including the playing surface. It is a lighting fixture that shines and is also called a stadium floodlight. The lighting fixture 1 may be used as a floodlight for illuminating facilities other than the stadium, for example, a floodlight for lighting up a building.

  The lighting fixture 1 is a plurality of (one set vertically adjacent to each other) functioning as a fixture main body, and a front member provided on a front surface 10F (FIG. 3) of each light emitting unit 10. The vehicle includes a front cover 11 and an arm 12 that supports these light emitting units 10.

(About arm 12)
The arm 12 integrally connects a left and right arm portion 13 extending vertically on the left and right sides of the light emitting unit 10 and a bottom frame portion 14 positioned below the light emitting unit 10 by bridging between lower ends of the respective arm portions 13. The lighting fixture 1 is formed in a U-shaped frame that opens upward when viewed from the front of the lighting fixture 1. The arm 12 is formed by bending a single metal plate, and has a symmetrical shape with respect to the left and right center positions of the lighting fixture 1. Note that the arm 12 may be manufactured by joining a plurality of plate members, and the manufacturing method may be appropriately changed.

The bottom frame part 14 is formed in a horizontal plate shape, and has a fixing hole part 14A for fastening and fixing the lighting fixture 1 to a gantry. After adjusting the left and right directions of the lighting fixture 1 according to the lighting area, the bottom frame portion 14 is fixed to the gantry using the fixing holes 14A.
The left and right arm portions 13 extend obliquely and linearly upward and forward from the left and right sides of the bottom frame portion 14 so as to be arranged in parallel with each other. In the present embodiment, the inclination angle θ of each arm 13 (FIG. 1) is about 55 degrees. However, the inclination angle θ is not limited to 55 degrees, and is appropriately changed according to the size of the light emitting unit 10 and the like.

  A first rotation shaft 15A is rotatably inserted into the distal end of each arm 13 along the left-right direction, and each first rotation shaft 15A is provided with a light projecting unit 10 disposed at an upper position for the first time. It is rotatably fixed integrally with the driving shaft 15A.

  A second rotation shaft 15B, which is another rotation shaft, is inserted into each arm 13 at an interval along the longitudinal direction of each arm 13 with respect to the first rotation shaft 15A. The second rotation shaft 15B is disposed obliquely below and parallel to the first rotation shaft 15A in a side view of the lighting device 1, and is rotatable independently of the first rotation shaft 15A. The light projecting unit 10 disposed below is fixed to the second rotating shaft 15B so as to be integrally rotatable.

  In FIG. 2, the maximum range of light emitted from the front surface 10F of each light emitting unit 10 along the optical axis of the light emitting unit 10 is indicated by a region R1. The direction L of the optical axis of the device is a direction extending along the direction of maximum luminous intensity of the light projecting unit 10, and coincides with the front direction in which the front surface 10F of the light projecting unit 10 faces in FIG.

As shown in FIG. 3, a portion connecting each arm portion 13 and the bottom frame portion 14 is formed in a widened portion 14 </ b> K having a widened shape that is connected to the lower end of each arm portion 13 and extends to the left and right outside of each arm portion 13. Have been.
The left and right widened portions 14K extend from the left and right sides of the bottom frame portion 14 to the left and right, and extend obliquely upward and upward, and extend upward from the upper end of the first inclined plate portion 14K1 along the vertical direction. A second plate portion 14K2 and a third inclined plate portion 14K3 extending obliquely upward and inward from the upper end of the second plate portion 14K2 toward the left and right and connected to the lower ends of the left and right arm portions 13 are integrally provided.

The respective bending angles between the bottom frame portion 14 and the first inclined plate portion 14K1, between the respective plate portions 14K1 to 14K3, and between the third inclined plate portion 14K3 and the arm portion 13 are less than 90 degrees. In other words, the widened portion 14K is formed by bending between the arms 13 and the bottom frame 14 in multiple stages with a space therebetween.
In FIG. 1 to FIG. 4, inflection points of bending of the widened portion 14K are indicated by lines. Of course, the widened portion 14K may be formed by a continuous curved surface whose inflection point is not clear.

  Each widening portion 14K can suppress deformation of the arm portion 13 and the bottom frame portion 14, respectively, as compared with a case where each arm portion 13 and the bottom frame portion 14 are formed in a simple U-shape that connects at right angles. The connection strength between the base and the bottom frame portion 14 can be improved. As shown in FIG. 3, by providing these widened portions 14 </ b> K, the lower light emitting unit 10 and the arm 12 can be further separated from each other. It can be used as a wiring space for passing wirings extending from the space.

Here, in order to mount a plurality of light projecting units 10 having the same width between the arm portions 13, it is desirable that the dimensional accuracy of the interval between the arm portions 13 is high and the arm portions 13 are exactly parallel to each other. In this configuration, by providing the widened portion 14K, sheet metal processing for making the arm portions 13 exactly parallel to each other becomes easy.
Further, by adjusting the shape of the widened portion 14K, the interval between the arm portions 13 can be adjusted. Further, when the lighting fixture 1 is attached to the gantry and receives a strong wind, an effect of reducing the external force transmitted from the arm 13 to the bottom frame 14 can be expected by the widened portion 14K.

As shown in FIG. 2, one of the left and right arm portions 13 is provided with a rotatable handle 16 at intervals vertically. The upper handle 16 is a manual operation member for fixing the vertical direction of the upper light emitting unit 10, and the lower handle 16 fixes the vertical direction of the lower light emitting unit 10. Manual operation member.
Since the handle 16 is provided for each light emitting unit 10 and the vertical direction of each light emitting unit 10 can be independently adjusted by each handle 16, the degree of freedom in adjusting the direction of each light emitting unit 10 can be improved.

In the case of a configuration in which a plurality of light emitting units 10 are separately mounted on a gantry, a space and a mounting structure for each of the light emitting units 10 are required on the gantry, resulting in an increase in the size of the lighting fixture 1 and the size of the gantry. In addition, a mounting operation is required for each light emitting unit 10, which leads to a longer operation time.
On the other hand, in the present configuration, the plurality of light emitting units 10 are collectively supported by the arm 12 and the arm 12 is mounted on the gantry, so that the lighting fixture 1 can be made compact, the gantry can be downsized, and the mounting work can be shortened. Time and simplification are facilitated.

(About the case 21 of the light emitting unit 10)
Next, the case 21 of the light emitting unit 10 will be described. The case 21 of each light emitting unit 10 is the same component.
FIG. 5 is a side view showing the case 21 together with the front cover 11.
The case 21 is formed by die-casting a high heat conductive material such as an aluminum alloy, and is formed in a hollow box shape with an open front. As illustrated in FIG. 3, the case 21 is formed in a rectangular shape that is longer in the left-right direction than in the up-down direction when viewed from the front of the lighting fixture 1. Further, on the back surface of the case 21, a heat radiating portion 22 composed of a large number of heat radiating fins is integrally formed.

The left and right side surfaces of the case 21 are integrally provided with projecting portions 23 projecting outward in the left and right directions with an interval vertically. Each projecting portion 23 functions as a rotating shaft attaching portion to which the above-described rotating shaft (the first rotating shaft 15A, the second rotating shaft 15B) can be attached. It has a fastening hole 23A for fastening and fixing.
The projecting portions 23 have a pair of projecting portions 23 </ b> B for attaching an angle display plate 31 functioning as a scale display body indicating a vertical rotation angle (also referred to as an attachment angle) of each light emitting unit 10. I have.

  These overhangs 23 are formed in the same shape as shown in FIG. As shown in FIG. 1 and the like, as for the upper light projecting unit 10, the first rotation axis 15 </ b> A and the angle display plate 31 are provided on the lower projecting portion 23 located on the lower light projecting unit 10 side. It is attached. As for the lower light projecting unit 10, the second rotation shaft 15B and the angle display plate 31 are attached to the upper projecting portion 23 located on the side of the light projecting unit 10 adjacent above.

  The projection 23 on the side where the rotation shafts (the first rotation shaft 15A and the second rotation shaft 15B) are not provided has a fall prevention (not shown) for preventing the light projection units 10 from falling. One end of the application wire is attached. As shown in FIG. 1 and FIG. 2 and the like, the projecting portion 23 on the side where the rotating shaft is not provided is exposed to the exterior of the lighting fixture 1, and the work of attaching the fall prevention wire is easy.

  The front surface of the case 21 (corresponding to the front surface 10F of the light projecting unit 10), that is, the light emitting surface of the light projecting unit 10 is covered with a transparent cover such as a transparent glass. If the front surface 10F is configured to be covered with a lens, some diffusion occurs depending on the lens. In this configuration, since the front surface 10F is not covered with the lens, diffusion by the lens can be avoided, and the irradiation range of light can be controlled with high accuracy by an optical system described later.

(About connection structure of case 21 and arm 12, and angle display board 31)
Next, the connection structure between the case 21 and the arm 12 and the angle display plate 31 will be described.
FIG. 6 is an exploded perspective view showing an example of a connection structure between the case 21 and the arm 12 of the upper light projecting unit 10, and shows a case where the lower overhang 23 and the arm 12 are connected. The arm 13 is attached to the overhang 23 with the angle display plate 31 interposed therebetween.
The angle display plate 31 has a display main body 32 formed in a disc shape with a concave cross section. The display main body 32 has a through hole 32A communicating with a fastening hole 23A of the overhang portion 23, and a protrusion portion 23. Are provided with a pair of engagement holes 32B with which the pair of protrusions 23B are engaged.

  The arm 13 is provided with a through hole 13 </ b> H communicating with the fastening hole 23 </ b> A of the overhang 23 and the through hole 32 </ b> A of the angle display plate 31. A sleeve 41 is inserted into the through hole 13H from the outside, and a bolt functioning as the first rotation shaft 15A is inserted into the sleeve 41. When the first rotating shaft 15A, which is a bolt, is fastened to the fastening hole 23A, the first rotating shaft 15A, the case 21, and the angle display plate 31 are integrated, and these are based on the sleeve 41. It is rotatably supported by the arm 13.

The display main body 32 is provided with a scale 32 </ b> M on the surface on the side opposite to the overhang portion 23, which indicates angle information corresponding to the vertical rotation angle of the light emitting unit 10. In addition, the arm 13 is provided with a mark 13S indicating the scale 32M on the surface opposite to the overhang 23.
In the display body 32, at least a part of the area of the scale 32M is exposed outside the arm 13 (see FIG. 2). Thus, the scale 32M can be visually recognized from the outside of the arm 12, and the vertical rotation angle of the light projecting unit 10 can be specified by the mark 13S.

  As shown in FIG. 2, an angle display plate 31 is attached to the upper projecting portion 23 of the lower light emitting unit 10, and the angle display plate 31 also has at least a part of the area of the scale 32M. Are exposed to the outside of the arm portion 13, and the scale 32M is visible from the outside.

As shown in FIG. 6, the arm 13 is provided with a through hole 13J through which the base end of the handle 16 passes and a holding member 43 disposed on the back side of the arm 13 at a position separated from the through hole 13H. A mating engagement hole 13K is provided. The base end of the handle 16 is inserted into the through hole 13J via a flat washer 44 and a spring washer 45.
At the base end of the handle 16, there are provided a screw portion 16 </ b> A that passes through a holding member 43 disposed on the back side of the arm portion 13, and a tool operation portion 16 </ b> C (book In the configuration, a shape protruding in a hexagonal shape) is provided integrally.

The sandwiching member 43 is a component for sandwiching the angle display plate 31 between the arm unit 13 and the plate-like opposed portion 43P facing the angle display plate 31, a through hole 43A provided in the opposed portion 43P, and a facing member. A pair of plate portions 43U that bend from the portion 43P to the opposite side of the angle display plate 31 and an engaging portion 43T that engages with the engaging hole 13K of the arm portion 13 are integrally provided.
The screw portion 16A of the handle 16 is passed through the through hole 43A of the holding member 43, and is fastened to the nut 46, which is a part to be fastened. Thus, the angle display plate 31 is held between the holding member 43 and the arm 13, and the rotation of the light projecting unit 10 is restricted.

In this way, the holding member 43 functions as a rotation restricting member that restricts the rotation of the light emitting unit 10 by rotating the handle 16 in the direction of the fastening side. Further, by rotating the handle 16 in the reverse direction, the rotation restriction of the light emitting unit 10 by the holding member 43 is released, and the light emitting unit 10 can be rotated.
However, the structure for restricting / releasing the rotation of the light emitting unit 10 is not limited to this structure, and another rotation restricting structure may be applied.

As shown in FIG. 6, the angle display plate 31 is provided with a pair of stoppers 35A and 35B that regulate the rotation range of the arm 13 with respect to the angle display plate 31. One stopper 35A penetrates the angle display plate 31 from the back side (light projection unit 10 side) so as to be located on one side in the rotation direction of the arm 13. Thus, when the arm 13 rotates to one side in the rotation direction, the arm 13 comes into contact with the stopper 35A, and further rotation of the arm 13 is restricted.
The other stopper 35B penetrates the angle display plate 31 from the back side (light projection unit 10 side) so as to be located on the other side in the rotation direction of the arm section 13, and the arm section 13 rotates in the other side in the rotation direction. When this occurs, it comes into contact with the stopper 35B, and further rotation of the arm 13 is restricted.
By adjusting the positions of the stoppers 35A and 35B, the rotation range of the arm 12 is restricted. In this configuration, the rotation range of each light emitting unit 10 is restricted by these stoppers 35 </ b> A and 35 </ b> B to a range in which the light emitting unit 10 does not come into contact with another adjacent light emitting unit 10.
The configuration of the stoppers 35A and 35B is not limited to the configuration shown in FIG. 6, and another configuration that can restrict the rotation range of the light emitting unit 10 may be applied.

(Other configurations of the angle display plate 31)
When adjusting the vertical rotation angle of the light projecting unit 10, it may be difficult to see the scale 32M provided on the outer surface (the arm 12 side) of the angle display plate 31 depending on the position of the worker performing the work. is there.
Therefore, in the present configuration, as shown in FIG. 7, the scale 32M is also provided on the back side of the angle display plate 31, that is, on the surface on the light emitting unit 10 side. FIG. 7 shows an example in which the light projecting unit 10 is inclined downward by 30 degrees. In this configuration, as shown in FIG. 1, an angle display plate 31 having scales 32M on both sides is provided on the left side of the light projecting unit 10 as in the right side.

As shown in FIG. 7, the scale 32 </ b> M provided on the light emitting unit 10 side is provided on the outer peripheral edge of the display main body 32. Since a part of the outer peripheral portion of the display main body 32 is exposed to the rear of the heat radiating portion 22 of the light emitting unit 10, an operator who performs various operations on the rear side of the light emitting unit 10 can easily see the scale 32M.
A mark 13S similar to the mark 13S is also provided on the back surface of the arm 13 (the surface on the side of the light emitting unit 10), and the light emitting unit 10 is vertically rotated by the mark 13S and the scale 32M. The angle can be easily confirmed, and the angle can be easily adjusted to a desired angle.

FIG. 7 shows a view of the angle display plate 31 of the lower light emitting unit 10 as viewed from the back. As shown in FIG. 7, the angle display plate 31 of the lower light projecting unit 10 has a relatively large area overlapping with the arm portion 13 as compared with the upper angle display plate 31, It is difficult to see 32M.
In this configuration, as shown in FIG. 7, a scale 32M and a mark 13S are also provided on the surface on the back side (the light emitting unit 10 side) of the angle display plate 31. This makes it easy to check the vertical rotation angle of the angle display plate 31 of the lower light emitting unit 10 from the back side.

  As described above, the vertical rotation angles of the upper and lower light emitting units 10 can be confirmed by either one of the two sides of the angle display plates 31 provided on the left and right of each light emitting unit 10, so that the work position by the worker can be changed. Even if it is restricted, the angle can be easily confirmed, and workability can be improved.

(Front cover 11)
The front cover 11 is detachably attached to the front face 10F of the light emitting unit 10. The front cover 11 integrally includes left and right side plate portions 11S extending forward from left and right sides of a case 21 of the light emitting unit 10 and an eave portion 11T extending between the upper edges of the left and right side plate portions 11S and extending forward. Have.
The eave portion 11T has a plate shape extending forward from the front surface 10F of the light projecting unit 10 along the device optical axis of the light projecting unit 10, and more specifically, has a forwardly inclined lower front than the device optical axis. It is formed in a plate shape extending to The left and right side plate portions 11S are formed of trapezoidal plate members in a side view that cover between the left and right ends of the eaves portion 31T and the front surface 10F of the light emitting unit 10.

The front cover 11 is formed of a material that does not transmit light, such as a metal plate, and has weather resistance. By adjusting the inclination angle of the eaves 31T of the front cover 11 to fall forward and the length of the eaves 31T, it is possible to prevent light at a predetermined angle above the optical axis of the light projecting unit 10 from being emitted. In addition, it is possible to suppress the influence on the surrounding environment due to upward leakage light (for example, a situation where glare is visually recognized by a resident or the like in a high-rise building).
Further, by adjusting the shape of the side plate portion 11S of the front cover 11, it is possible to suppress the light leakage to the left and right of the light projecting unit 10, and to suppress the influence on the surrounding environment due to the light leakage to the left and right.

  The side plate 11S is not limited to a trapezoidal plate. Further, the transparent cover provided on the front surface 10F of the case 21 may be provided on the light emission surface side of the front cover 11. Further, the front cover 11 is not limited to the one that does not transmit light, and may be formed of a resin or the like that transmits light.

(When a plurality of light emitting units 10 are adjusted horizontally)
As shown in FIG. 2, when the light projecting units 10 are adjusted in the horizontal direction, the regions R1 that are the maximum ranges of the light emitted from each light projecting unit 10 along the optical axis of the device do not overlap with each other. In addition, the light emitted from each light emitting unit 10 along the optical axis of the device is not blocked by another adjacent light emitting unit 10.
Further, since the upper light projecting unit 10 is supported by being shifted to the front, which is the light irradiation side, from the light projecting unit 10 adjacent below, the upper light projecting unit 10 is directed downward from the upper light emitting unit 10 to the instrument optical axis. The emitted light is also less likely to be blocked by the lower light projecting unit 10.

(When each light emitting unit 10 is adjusted downward)
FIG. 8 shows a case where each light emitting unit 10 is adjusted downward. As shown in this figure, even when each of the light projecting units 10 is directed downward, the region R1, which is the maximum range of light along the device optical axis, does not overlap with each of the light projecting units 10 and does not overlap. The light emitted from the light source along the instrument optical axis is not blocked by another adjacent light emitting unit 10.

  In FIG. 8, reference symbol D1 indicates a separation distance between vertically adjacent light emitting units 10. This separation distance D1 is set in the range of several mm to several tens of cm, and the light projecting units 10 are arranged close to each other. As a result, as shown in FIG. 3, when viewed from the front of the lighting fixture 1, the front faces 10 </ b> F of the upper and lower light emitting units 10 can be vertically continuous, and are substantially the same as one light emitting unit having the same instrument light flux. Irradiation is possible. Further, it is also possible to reduce the vertical space required for arranging the plurality of light emitting units 10.

As shown in FIG. 8, the distance D1 between the vertically adjacent light emitting units 10 is small, and the light emitting units 10 are maintained close to each other. In this configuration, the upper light projecting unit 10 is supported by being shifted to the irradiation side of each light projecting unit 10 along the horizontal plane than the lower light projecting unit 10 adjacent to the lower light projecting unit 10. When facing downward, the front surfaces 10F of the upper and lower light projecting units 10 are aligned. This enables the same illumination as one light emitting unit having the same instrument light flux.
In addition, since the upper and lower light projecting units 10 can be independently rotated, it is possible to make the directions of the upper and lower light projecting units 10 different from each other, as compared with one light emitting unit having the same instrument light flux. The degree of freedom for adjusting the illumination range, the illuminance, and the like is improved.

As described above, in the present configuration, the first rotation axis 15A, which is the rotation axis of the upper light emitting unit 10, is provided at a position close to the lower light emitting unit 10, and the lower light emitting unit 10 Since the second rotation shaft 15B, which is the rotation shaft of, is provided at a position close to the upper light emitting unit 10, even if the direction of the light emitting unit 10 is adjusted, the respective light emitting units 10 are arranged close to each other. Can be maintained.
In the case of making a lighting device that irradiates light obliquely upward from the ground using the lighting device technology of the present invention, for example, the arm 12 of the lighting device 1 is separated from the bottom frame portion 14, contrary to the present embodiment. As the arm 13 is configured to be inclined more in the direction opposite to the irradiation side, even if the upper and lower light emitting units 10 are directed obliquely upward, the light emitting units 10 can be maintained close to each other, and the same device is used. Irradiation similar to one light projection unit having a light beam is possible.

Further, since the arms 12 that support the respective light emitting units 10 extend obliquely forward and upward, the upper light emitting unit 10 is projected along the horizontal plane more horizontally than the lower adjacent light emitting unit 10. The unit 10 can be easily supported in a state shifted to the irradiation side. For this reason, as shown in FIGS. 2 and 8, even when the direction of each light projecting unit 10 is changed to a horizontal direction or a diagonally downward direction, light emitted from each light projecting unit 10 along the optical axis of the device is used. However, it is not interrupted by another adjacent light emitting unit 10.
In addition, since the upper and lower light projecting units 10 can be independently rotated, it is possible to perform wide irradiation in the vertical direction, and it is easy to illuminate a wide space in the vertical direction.

  As described above, in the support structure of the light emitting unit 10 of the present configuration, the arm 12 supports the light emitting units 10 arranged vertically and supports the light emitting units 10 except for the light emitting unit 10 at the lowest position. Is supported so as to be able to irradiate light while avoiding the light-emitting unit 10 adjacent below, so that the light-emitting unit 10 is shifted toward the irradiation side of each light-emitting unit 10 along the horizontal plane. Thereby, the plurality of light emitting units 10 can be arranged compactly, and a situation in which light is blocked between adjacent light emitting units 10 can be suppressed. Therefore, the space required for mounting the plurality of light projecting units 10 can be reduced, the mounting operation can be facilitated, and the lighting of a wide lighting space such as a stadium can be suitably performed.

Further, since the arm 12 rotatably supports each of the plurality of light emitting units 10 via independent rotating shafts (a first rotating shaft 15A and a second rotating shaft 15B), each of the light projecting units 10 is supported. The directions of 10 can be adjusted independently, and the degree of freedom of adjustment such as the irradiation range and the spatial illuminance is improved.
Further, the plurality of light emitting units 10 are configured from a pair of vertically adjacent light emitting units 10, but may be configured from a plurality of vertically adjacent light emitting units 10. In this configuration, the first rotation shaft 15 </ b> A of the upper light emitting unit 10 is provided at a position closer to the lower light emitting unit 10, and the lower light emitting unit 10 is provided. The second rotation shaft 15B is provided at a position close to the upper light emitting unit 10, so that even if each light emitting unit 10 is rotated, each light emitting unit 10 can be maintained in a close state.

  The case 21 of the light projecting unit 10 has an extension 23 functioning as a rotating shaft mounting portion to which a rotating shaft (the first rotating shaft 15A and the second rotating shaft 15B) can be selectively mounted. Since the case 21 of each light emitting unit 10 can be used as a common component because it is provided with an interval above and below, the types of components can be reduced. Moreover, in this configuration, since the projecting portion 23 on the side where the rotating shaft is not provided is used as a mounting portion for the fall prevention wire, there is no need to provide a dedicated mounting portion for the fall prevention wire.

Further, the arm 12 includes left and right arm portions 13 that support the plurality of light projecting units 10, and a widened portion 14 </ b> K that is connected to each of the arm portions 13 and extends to the left and right outside of each of the arm portions 13. Etc. can be suppressed.
Further, the arm 12 has a bottom frame portion 14 functioning as a mounting portion to be mounted on a pedestal for supporting a lighting fixture, and has a widened portion 14K between the bottom frame portion 14 and each arm portion 13. The deformation of the portion 13 and the bottom frame portion 14 can be suppressed, and the connection strength between the arm portion 13 and the bottom frame portion 14 can be improved. Thereby, the rigidity of the arm 12 can be increased without providing a separate reinforcing member.

Further, by providing the widened portion 14K, a gap can be secured between the light emitting unit 10 and the arm 12, and this gap can be used as a wiring space for wiring or the like extending from the light emitting unit 10.
In addition, since the stoppers 35A and 35B for restricting the rotation range of each light emitting unit 10 to a range that does not come into contact with another adjacent light emitting unit 10 are provided, it is possible to easily avoid a situation where each light emitting unit 10 comes into contact. Can be.

  Further, as described above, the angle display plate 31 functioning as a scale display body indicating the vertical rotation angle of the light emitting unit 10 is provided on the surface of the display plate 31 on the light emitting unit 10 side and on the opposite side (this embodiment). In the embodiment, a double-sided scale display body having a scale 32M is formed on both surfaces which are exposed to the arm 12). This makes it easy to confirm the vertical rotation angle of the light emitting unit 10 from both the light emitting unit 10 side and the arm 12 side.

  In addition, since the angle display plate 31 is provided between each of the left and right arms 13 and the light emitting unit 10, the vertical rotation angle of the light emitting unit 10 can be checked from either the left or right side of the light emitting unit 10. It will be easier. Accordingly, the operator can easily check the vertical rotation angle of the light emitting unit 10 at any position around the lighting fixture 1.

Further, since the angle display plate 31 is provided between each of the light emitting units 10 supported by the arm 12 and the arm 12, the vertical rotation angle of each of the light emitting units 10 can be confirmed. Note that the angle display plate 31 is not limited to between the arm 13 and the light projecting unit 10 and may be outside the arm 13.
Further, the angle display plate 31 is configured to rotate integrally with the light projecting unit 10. The angle display plate 31 has a structure in which the rotation range of the arm 12 with respect to the angle display plate 31 is regulated. Stoppers 35A and 35B for restricting the rotation range of 10 are provided. Thus, the rotation range of the light projecting unit 10 can be regulated by using the angle display plate 31, and the number of components can be reduced and the stopper mechanism can be simplified.

Next, the optical system of the lighting fixture 1 will be described.
(About optical system)
9 is a diagram of the light projecting unit 10 viewed from the front together with the optical system, FIG. 10 is a cross-sectional view (transverse cross-sectional view) of FIG. 9, and FIG. 11 is a cross-sectional view of BB of FIG. FIG.
The light projecting unit 10 includes a plurality of light source units 53 in the vertical direction (two rows in the present embodiment) and a plurality of light source units 53 in the horizontal direction (the present embodiment). 8 columns). Each light source unit 53 is the same.
The light source unit 51 has a plurality of (three in this embodiment) light sources 54, and these light sources 54 are arranged in the vertical direction. As each light source 54, for example, an LED such as a COB LED is used. The COB-type LED can obtain higher output than the SMD-type LED because many LED elements are integrated in one light source. The light source 54 is not limited to the LED, and a light emitting element other than the LED may be used.

The reflector 52 has a plurality of (three in this embodiment) reflecting mirrors 56, and these reflecting mirrors 56 are arranged in the up-down direction. Each reflecting mirror 56 has a reflecting surface 56A formed of a parabolic surface or an elliptical reflecting surface, and is connected vertically in a state where a part of each reflecting surface 56A is overlapped with each other. In addition, the major axis of the paraboloid or the elliptical reflecting surface constituting the reflecting surface 56A of each reflecting mirror 56 is aligned in substantially the same direction as the direction L of the apparatus optical axis, and is parallel to each other.
Thereby, as shown in FIG. 10, in the horizontal direction, the light distribution of the light from each light source 54 is controlled by the reflecting mirror 56 with high accuracy. In FIGS. 10 and 11, reference numeral L1 indicates an optical axis of the light source 54 (corresponding to the optical axis of the light source unit 51), and reference numerals LA to LL indicate a part of light of each light source 54. In FIG. 10, the symbol θA indicates a range directly emitted from the light source 54 with reference to the optical axis L1.

  The reflecting surface 56A of each reflecting mirror 56 is formed as a reflecting surface that makes the light of each light source 54 a narrow-angle light distribution. For this reason, the light LA and LB (light having an angle θA or more) on the wide-angle side emitted from the light source 54 is incident on the reflection surface 56A, and the emission direction is controlled. Since the light from each light source 54 forms a narrow-angle light distribution, the light irradiation range can be narrowed to a relatively narrow range.

Further, since the reflecting mirrors 56 of the respective light source units 53 are arranged at intervals in the horizontal direction, it is possible to suppress the overlap of the light reflected by the horizontally adjacent reflecting mirrors 56 and suppress glare. Can be.
Note that the reflection surface 56A is not limited to a reflection surface having a narrow-angle light distribution, and may be a reflection surface that suppresses an overlap with light reflected by the adjacent light source unit 53 within a range in which glare can be suppressed. For example, when the distance between the light source units 53 in the horizontal direction is increased, the reflection surface 56A that performs reflection control close to the medium-angle light distribution may be used.

As shown in FIG. 11, in the present configuration, the plurality of reflecting mirrors 56 constituting the reflector 52 are connected vertically in a state where a part of each reflecting surface 56 </ b> A overlaps each other. The portion on the reflection surface 56A side adjacent to 56A is a cutout portion (hereinafter, referred to as a cutout portion 56K).
Therefore, as shown in FIG. 11, light LD and LE emitted obliquely downward from each light source 54 are emitted obliquely downward through each cutout 56K. These lights LD and LE are wide-angle light emitted from the light source 54 at an angle θA or more shown in FIG.
That is, in the horizontal direction, the light on the wide-angle side that is incident on the reflecting surface 56A can be directly emitted in the vertical direction without being incident on the reflecting surface 56A. Light can be emitted from the light projecting unit 10 in a wide angle range in the direction.

In general, it is desired that a stadium projector emit light in a wide angle range in the vertical direction. If the reflecting surface 56A of the reflecting mirror 56 is changed to a wide-angle light distribution type, the lights from the left and right light sources 54 overlap each other, and glare is given to a person moving horizontally in the stadium (for example, a baseball player or a land-based player). May be recognized.
On the other hand, in the present configuration, the reflecting surface 56A of the reflecting mirror 56 is of a light distribution type having a relatively narrow angle, and a part of each reflecting surface 56A is connected in a state of being overlapped with each other, and the overlapped portion is formed. Since the light LD and LE on the wide-angle side from the light source 54 are emitted through the notch 56K, the light distribution is controlled so that glare can be suppressed in the horizontal direction, and the light is irradiated in a wide angle range in the vertical direction. Can be.

In FIG. 11, light LF, LG, and LH indicate a part of light emitted from each light source 54 and reflected by the reflection surface 56A.
As shown in FIG. 11, the light sources 54 corresponding to the reflecting mirror 56 extending below the notch 56K emit light LJ and LK on the wide area side obliquely upward, and these light LJ and LK are also notched. The light is emitted from the light projecting unit 10 through the portion 56K.
In this configuration, the lights LJ and LK emitted upward through the notch 56K enter the eaves portion 11T of the front cover 11, and are reflected downward by the eaves portion 11T.
In addition, a part of the light emitted upward from the light source 54 (for example, light LL in FIG. 11) also enters the eaves portion 11T and is reflected downward by the eaves portion 11T.

  That is, the light reflecting surface 11X is formed on the inner surface (corresponding to the lower surface) of the eave portion 11T by metal deposition or by providing a light reflecting member. Thereby, the light irradiated upward can be restricted, the influence on the surrounding environment can be suppressed, and the amount of illumination below can be increased, thereby improving the light use efficiency.

  Further, in this configuration, since a plurality of light source units 53 including the light source unit 51 and the reflector 52 are arranged in the horizontal direction, the light distribution range is increased while distributing light in a wide angle range in the vertical direction. , Can be spread horizontally. In addition, since a plurality of the light source units 53 are arranged in the vertical direction, light can be applied to a wider angle range in the vertical direction. Thus, the present invention is suitable for large-area spatial lighting such as a stadium that is wide in the horizontal and vertical directions.

  As described above, in the optical system of the light projecting unit 10 of the present configuration, the reflector 52 that reflects the light of the light source unit 51 has a plurality of reflecting mirrors 56 having a reflecting surface 56A formed of a paraboloid or an elliptical reflecting surface. Each of the reflecting mirrors 56 is connected vertically in a state where a part of each of the reflecting surfaces 56A is overlapped with each other, and is incident on the reflecting surface 56A in the horizontal direction through the overlapping portion (the cutout 56K). Since the light on the wide angle side of the light source unit 51 is directly emitted in the vertical direction, the light can be emitted in the horizontal direction so as to suppress glare, and the light can be emitted in a wide angle range in the vertical direction, which is suitable for stadium lighting. Spatial lighting can be provided.

Further, since the light source unit 51 has the light source 54 for each reflecting mirror 56, the light distribution of the light of the light source 54 can be controlled with high accuracy by the reflecting mirror 56.
Further, since the reflection surface 56A is formed as a reflection surface that makes the light of the light source 54 have a narrow angle light distribution, the light emission range of the light source 54 is narrowed down to a relatively narrow range, and a wide angle range is formed in the vertical direction. Can be irradiated.

  Further, since a plurality of light source units 53 each including the reflector 52 and the light source unit 51 are arranged in the horizontal direction, light can be applied to a wide range in the vertical and horizontal directions. Further, since the plurality of light source units 53 are arranged in the vertical direction, light can be applied to a wider area in the vertical direction. These are suitable for space illumination of a large space that is wide in the horizontal and vertical directions.

  Further, the front cover 11 provided on the front side, which is the light emission side of the light emitting unit 10, receives a part of the light in the vertical direction emitted from the light emitting unit 10, and makes the incident light upward and the incident direction. Since it functions as a front member that reflects in a different downward direction (predetermined direction), upward leakage light can be used for illumination light, and upward glare can be suppressed. Note that the reflection direction of the front cover 11 may be appropriately changed.

The above-described embodiment is merely an example of an embodiment of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.
For example, the lighting device 1 has exemplified the case in which the two light emitting units 10 are vertically arranged and supported on the arm 12, but three or more light emitting units 10 may be vertically arranged and supported. Further, the shapes of the light projecting unit 10 and the arm 12 and the configuration of each part may be appropriately changed.

  In addition, the case where each of the light emitting units 10 is rotatable about a rotation axis (a first rotation axis 15A and a second rotation axis 15B) that is parallel to each other has been described as an example. It may be. Further, depending on the conditions of the illumination area, any of the light emitting units 10 may not be rotatable, or if the illumination area is fixed, all the light emitting units 10 are disabled from rotating. A configuration may be adopted.

  In addition, the case where the case 21 of each of the light emitting units 10 is a common component has been described. However, the case 21 need not be a common component. Also, a case has been described in which the drop prevention wire is attached to the protruding portion 23 on the side where the rotation shaft (the first rotation shaft 15A and the second rotation shaft 15B) is not provided. It may be omitted. Further, the stoppers 35A and 35B may be omitted.

Also, the case where the light source 54 is provided for each reflecting mirror 56 has been described, but the light source 54 may not be provided for each reflecting mirror 56 as long as the light source can input light to each reflecting mirror 56. Although the case where the front cover 11 is provided in each of the light emitting units 10 has been described, the front cover 11 may be omitted, and even when the front cover 11 is provided, the shape and configuration of the front cover 11 may be appropriately changed. Is also good.
Further, the shape and configuration of the angle display plate 31 may be appropriately changed. In the above-described embodiment, the case where the angle display plates 31 are provided on the left and right of each of the light emitting units 10 has been described. Even when the angle display plate 31 is provided on one of the left and right sides, since the angle display plate 31 has the scales 32M on both sides, the rotation angle of the light projecting unit 10 is confirmed as compared with the case where the scale 32M is provided only on one side. Easier to do.

  Further, in the above-described embodiment, the case where the present invention is applied to the lighting fixture 1 configured to project light in the horizontal direction or downward has been described. However, the present invention is not limited to this. For example, light is projected upward. The present invention may be applied to a lighting fixture configured to emit light.

DESCRIPTION OF SYMBOLS 1 Lighting equipment 10 Light emitting unit 10F Front of light emitting unit (light emitting surface)
11 Front cover (front member)
11S Side plate portion 11T Eave portion 11X Light reflecting surface 12 Arm 13 Arm portion 13S Marking portion 14 Bottom frame portion 14K Widening portion 15A First rotating shaft 15B Second rotating shaft 16 Handle 21 Case 22 Heat radiating portion 23 Overhanging portion (rotating portion) Dynamic shaft mounting part)
31 Angle display plate (double-sided scale display)
Reference Signs List 32 display main body 32M scale 35A, 35B stopper 43 pinching member 51 light source unit 52 reflector 53 light source unit 54 light source 56 reflecting mirror 56A reflecting surface 56K notch R1 maximum range of light along instrument optical axis for each light emitting unit L instrument light Axial direction DA Separation distance of light emitting unit LA to LL Light from light source θ Tilt angle θA Angle indicating direct light range

Claims (6)

A lighting device that includes a light source unit and a light projecting unit having a reflector that reflects light from the light source unit, and that emits light from the light projecting unit to an illumination space.
The reflector has a plurality of reflecting mirrors having a reflecting surface consisting of a parabolic surface or an elliptical reflecting surface, and each reflecting mirror is vertically connected with a part of each reflecting surface overlapping each other. A lighting device for emitting light on the wide-angle side of the light source unit which is incident on the reflection surface in the horizontal direction through the overlapped portion, and directly emits light in the vertical direction.   The lighting device according to claim 1, wherein the light source unit has a light source for each of the reflecting mirrors.   The lighting device according to claim 2, wherein the reflection surface is a reflection surface that makes the light of the light source a narrow-angle light distribution.   The lighting device according to any one of claims 1 to 3, wherein a plurality of light source units each including the reflector and the light source unit are arranged in at least a horizontal direction.   The lighting device according to claim 4, wherein a plurality of the light source units are arranged in a vertical direction. It is provided on the front side which is the light emission side of the light emitting unit,
The lighting device according to claim 1, further comprising a front member on which a part of light in the vertical direction emitted from the light projecting unit enters and reflects in a predetermined direction.

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