Wind direction display device

Abstract

To increase visibility from above at night.SOLUTION: A wind direction display device attached to a pillar includes: a cylindrical streamer; an attaching part for connecting the streamer and the pillar, which includes a cylindrical frame provided at one end part of the streamer; and an illumination device provided at the attaching part for emitting light onto an inner surface of the streamer. The illumination device includes a light source unit having a light emission part and an optical component having a cavity part in which the light emission part is provided. The optical component has a lens including a cylindrical shaped part with a first central axis along a horizontal direction as a central axis. The light source unit is provided so as to overlap with a hollow part of the frame when viewed along a second central axis, which is a central axis of the frame, and so that a center of a bundle of rays emitted from the light emission part is directed to a horizontal direction or obliquely upward from a horizontal direction by a predetermined angle.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a wind direction indicator. [Background technology]

[0002] Patent Document 1 discloses a night-use windsock that moves a lighting device in response to the movement of the windsock according to the wind direction and wind speed. This night-use windsock has a first rotating device that can rotate around the axis of a pole, a second rotating device that is rotatably supported by the first rotating device and rotates (up and down) around a horizontal axis to move in response to the inclination angle of the windsock body, a lighting device attached to the second rotating device for illuminating the windsock body, and a windsock body attached to the second rotating device for receiving the wind. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-157042 A Summary of the Invention [Problem to be solved by the invention]

[0004] The invention described in Patent Document 1 is intended for windsocks that are primarily installed on highways, and illuminates the entire windsock from the outside. The invention described in Patent Document 1 also uses a reflector to reflect light in multiple directions, but because it uses a reflector, it is considered to be premised on the windsock being visible from a close distance. The invention described in Patent Document 1 also has a structure that sends irradiated light to the ground, so it is considered to be premised on visibility from below, and visibility from above is considered to be quite low.

[0005] In the case of windsocks installed at airports, pilots of aircraft taking off and landing and air traffic controllers in the control tower can see the windsock from above and from a distance. Therefore, it is desirable to improve the visibility of the windsock from above and from a distance.

[0006] The present invention has been made in consideration of the above circumstances, and has an object to provide a wind direction indicator that can improve visibility from above at night. [Means for solving the problem]

[0007] In order to solve the above problems, the wind direction display device of the present invention is, for example, a wind direction display device mounted on a support, comprising: a cylindrical windsock; an attachment part connecting the windsock to the support, the attachment part having a cylindrical frame mounted on one end of the windsock; and a lighting fixture mounted on the attachment part and irradiating light onto the inner surface of the windsock, wherein the lighting fixture has a light source unit having a light-emitting part and an optical component having a hollow part in which the light-emitting part is mounted, the optical component having a lens including a part of a cylindrical shape with a first central axis along the horizontal direction as its central axis, and the light source unit is mounted so as to overlap with the hollow part of the frame when viewed along a second central axis which is the central axis of the frame, and so that the center of the light beam emitted from the light-emitting part faces horizontally or diagonally upward at a predetermined angle from the horizontal direction.

[0008] According to the wind direction display device of the present invention, a light source unit having a light emitting part and an optical component having a hollow part in which the light emitting part is provided is provided so as to overlap with the hollow part of the frame when viewed along the central axis of a cylindrical frame provided at one end of the windsock. This allows the light emitting part to illuminate the windsock from the inside. Also, the optical component has a lens including a part of a cylindrical shape with a first central axis along the horizontal direction as the central axis. This allows the light source unit to illuminate the upper side of the windsock in a band shape. Therefore, visibility from above at night can be improved.

[0009] The lens may have an arc shape in which the surface farther from the light-emitting unit is convex in a direction away from the light-emitting unit in a cross section including the first central axis. This causes the light emitted from the light-emitting unit to diffuse in a direction along the central axis ax2, widening the width of the band that illuminates the upper side of the windsock. This improves visibility from above the windsock.

[0010] The light source unit may be disposed vertically below the second central axis when viewed along the second central axis, such that the center of the light beam is directed obliquely upward at a predetermined angle from the horizontal direction. This allows the light source unit to directly illuminate the upper side of the windsock from the inside.

[0011] The lighting fixture may have a plate-shaped portion on which the light source units are provided, and the light source units may be arranged such that end faces perpendicular to the first central axis of the lens are parallel to each other. This allows many light source units to be provided in a small area, and the upper side of the windsock can be illuminated more brightly. Effect of the Invention

[0012] According to the present invention, visibility from above at night can be improved. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a diagram showing an outline of a wind direction light 100 provided with a wind direction display device 1. [Diagram 2] 1 is a diagram showing an outline of a wind direction display device 1. FIG. [Diagram 3] 1 is a diagram showing an outline of a lighting fixture 10. FIG. [Figure 4] 4A and 4B are diagrams showing an outline of a lighting fixture 10, in which (A) is a cross-sectional view taken along line AA in FIG. 3, and (B) is an enlarged view of a portion of (A). [Diagram 5] 13 is an enlarged view of the optical component 16, where (a) is an oblique view, (b) is a view as viewed from the arrow B of (a), (c) is a view as viewed from the arrow C of (b), (d) is a view as viewed from the arrow D of (b), (e) is a cross-sectional view of (c) (cross-sectional view at the central axis ax2), and (f) is a view as viewed from the arrow E of (a). [Figure 6] 2 is a diagram showing a schematic diagram of light projected from a light source unit 14. FIG. [Figure 7] FIG. 2 is a diagram showing a schematic positional relationship between a lighting fixture 10 and a windsock unit 20 (windsock 21 and mounting portion 22). [Figure 8]FIG. 2 is a diagram illustrating a schematic view of an area irradiated with light by a lighting fixture 10 (i.e., a light source unit 14). [Figure 9] FIG. 13 is a diagram showing an outline of a lighting device 10A according to a modified example. [Figure 10] FIG. 13 is a diagram showing an outline of a lighting device 10B according to a modified example. [Figure 11] 13 is an enlarged view of an optical component 16A according to a modified example, where (a) is an oblique view, (b) is a view as viewed by arrow B in (a), (c) is a view as viewed by arrow F in (a) (a perspective view seen diagonally from above), (d) is a view as viewed by arrow D in (b), (e) is a view as viewed by arrow E in (a), and (f) is a cross-sectional view at plane p. [Figure 12] 11 is a diagram showing an arrangement of light source units 14A, 14B in a lighting device 10C according to a modified example. [Figure 13] FIG. 13 is a perspective view showing an outline of an optical component 16C according to a modified example. [Figure 14] FIG. 11 is a diagram showing a schematic arrangement of a lighting fixture 10 and a windsock unit 20A in a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The wind direction indicator of the present invention is used to indicate wind direction during the day and at night, and is installed at airports, heliports, etc.

[0015] 1 is a diagram showing an outline of a wind direction light 100 provided with a wind direction display device 1 according to a first embodiment of the present invention. Hereinafter, the vertical direction is defined as the z direction, and two orthogonal directions along the horizontal direction are defined as the x direction and the y direction.

[0016] The wind direction display device 1 mainly includes a lighting fixture 10 and a windsock unit 20. The wind direction light 100 mainly includes a support pole 30, an aircraft obstruction light 40, and a circular strip light 50.

[0017] First, the schematic configuration of the wind direction light 100 will be described. The support pole 30 mainly has a support pole 31, a base 32, and an arm 33. The support pole 31 is generally rod-shaped and is installed so as to extend vertically via the base 32 buried in the ground G. The support pole 31 is detachable from the base 32, and the support pole 31 can be tilted during maintenance work, etc. However, the support pole 31 and the base 32 may be installed in a place other than the ground G. The support pole 31 may also be tilted with respect to the vertical direction.

[0018] The pole 31 is provided with an aviation obstruction light 40, a circular strip light 50, etc. The aviation obstruction light 40 is provided at the upper end of the pole. The aviation obstruction light 40 is well known, so a description thereof will be omitted.

[0019] The circular band light 50 is attached to the support pole 31 via an arm 33. The circular band light 50 is disposed below the wind direction display device 1, and illuminates the ground G in a circular shape from above. Multiple circular band lights 50 (four in this example) are provided, and are disposed approximately evenly around the support pole 31 when viewed from above.

[0020] In this embodiment, the wind direction light 100 has four circular band lights 50, but the number and arrangement of the circular band lights 50 are not limited to this. For example, the wind direction light 100 may have three circular band lights 50, and the three circular band lights 50 may be arranged approximately evenly around the pole 31 when viewed from above.

[0021] Next, the wind direction display device 1 will be described. The wind direction display device 1 is attached to a support pole 31. Fig. 2 is a diagram showing an outline of the wind direction display device 1. The windsock unit 20 mainly has a windsock 21 and an attachment part 22. The lighting fixture 10 is attached to the attachment part 22.

[0022] Windsock 21 is cylindrical and made of flexible fabric that flutters in the wind. For example, cotton, linen, or synthetic fibers are used for the fabric. Windsock 21 is preferably optically transparent so that light emitted from lighting fixture 10 can pass through to the outside. Windsock 21 may also be configured in a striped pattern by connecting fabrics of multiple colors (e.g., red and white).

[0023] The mounting part 22 is a member that connects the windsock 21 and the support pole 31. The mounting part 22 mainly has a frame 22a, rotating devices 22b and 22c, and a mounting arm 22d.

[0024] Frame 22a is cylindrical and is provided at one end of the windsock. Frame 22a is provided to support 31 via rotating devices 22b and 22c. Rotating devices 22b and 22c each have a hole into which support 31 is inserted, and rotating devices 22b and 22c, i.e., frame 22a, can rotate with respect to support 31.

[0025] For example, the frame 22a may be attached to the support 31 via a cord-like body having both ends attached to the support 31.

[0026] Frame 22a mainly has rings 22m, 22n and connecting portions 22o, 22p. Ring 22m is provided at one end of windsock 21, and ring 22n is provided inside windsock 21.

[0027] The connecting portions 22o and 22p are members that connect the ring 22m and the ring 22n. The connecting portion 22o is rod-shaped, and both ends are provided on the ring 22m and the ring 22n. The connecting portion 22p is formed by bending a rod-shaped member into a U-shape or a C-shape, and both ends are provided on the ring 22n, and the ring 22m is provided near the rod-shaped portion 22q that corresponds to the bottom of the U-shape or the C-shape. This forms the frame 22a into a cylindrical shape.

[0028] It should be noted that the frame 22a is not limited to the embodiment shown in the figure. For example, the shape and number of the connecting parts 22o and 22p are not limited to those described above. Also, for example, the connecting part 22p may be divided into a pair (two) of connecting parts 22o and a rod-shaped part 22q that connects the two connecting parts 22o. Also, for example, the rings 22m and 22n may have different diameters or may have the same diameter.

[0029] Frame 22a, specifically rod-shaped portion 22q, is attached to rotating devices 22b and 22c. As a result, the end of windsock 21 on the side where ring 22m is attached is attached adjacent to support pole 31. Wind flows into windsock 21 from the ring 22m side and exits from the side of windsock 21 where ring 22m is not attached, so that windsock 21 is caught by the wind and flies up. As the wind direction changes, windsock 21 rotates around support pole 31 by rotating devices 22b and 22c, and the direction of windsock 21 changes.

[0030] An attachment arm 22d is provided on the rod-shaped portion 22q. The attachment arm 22d has the rod-shaped portion 22q at one end and a lighting fixture 10 at the other end. The lighting fixture 10 irradiates light onto the inner surface of the windsock 21. The lighting fixture 10 is provided so as to overlap with the hollow portion of the frame 22a when viewed along the central axis ax1 (corresponding to the second central axis of the present invention) of the frame 22a. The central axis ax1 is along the horizontal direction (the x direction in Figs. 1 and 2).

[0031] Fig. 3 is a diagram showing an outline of lighting fixture 10. Fig. 4 is a diagram showing an outline of lighting fixture 10, where (A) is a cross-sectional view taken along line AA in Fig. 3, and (B) is an enlarged view of a portion of (A). Note that hatching indicating a cross section is omitted in Fig. 4.

[0032] The lighting fixture 10 mainly has a main body portion 11, a plate-shaped portion 12, a shade portion 13, and a light source unit 14.

[0033] The main body 11 is a member having a truncated cone shape and includes a drive circuit (not shown) for the light source unit 14. An attachment part 11a is provided at the end of the main body 11 on the narrower diameter side to be attached to the attachment arm 22d.

[0034] The plate-like portion 12 is a disk-shaped member provided so as to cover the end with a larger diameter of the main body portion 11. On a surface 12a of the plate-like portion 12, a light source unit 14 is provided.

[0035] The umbrella portion 13 is provided around the plate-shaped portion 12. The umbrella portion 13 is a truncated cone cylinder whose diameter gradually increases or decreases from one side to the other side in the axial direction. The main body portion 11 and the plate-shaped portion 12 are provided at the end of the umbrella portion 13 on the smaller diameter side. The end of the umbrella portion 13 on the larger diameter side is open, and the plate-shaped portion 12 and the light source unit 14 can be seen through this opening.

[0036] The lighting fixture 10 has three light source units 14. Note that the number of light source units 14 is not limited to three, and may be one, two, or four or more.

[0037] The light source unit 14 mainly includes a light-emitting section 15 and an optical component 16. The light-emitting section 15 mainly includes a substrate 15a and a light-emitting element 15b. The light-emitting section 15 is a light-emitting diode that lights up when a constant current is supplied to it, and emits visible light. The light-emitting section 15 is provided on the plate-shaped section 12. The optical component 16 is translucent, and is provided on the plate-shaped section 12 so as to cover the light-emitting section 15. The optical component 16 mainly includes a lens 16a that covers the light-emitting section 15, and an attachment section 16b to the plate-shaped section 12.

[0038] 5 is an enlarged view of the optical component 16, where (a) is a perspective view, (b) is a view as viewed by arrow B in (a), (c) is a view as viewed by arrow C in (b), (d) is a view as viewed by arrow D in (b), (e) is a cross-sectional view (cross-sectional view at the central axis ax2) in (c), and (f) is a view as viewed by arrow E in (a). The lens 16a is provided with a plate-shaped mounting portion 16b. When viewed by arrow B, the mounting portion 16b has a rectangular shape with two sides parallel to the central axis ax2 of the lens 16a (corresponding to the first central axis of the present invention).

[0039] Lens 16a includes a part of a cylindrical shape having central axis ax2 as a central axis. Therefore, due to this part of the cylindrical shape, lens 16a has a cross section without lens action (cross section perpendicular to central axis ax2) and a cross section with lens action (cross section parallel to central axis ax2).

[0040] The lens 16a has a hollow portion 16d in which the light-emitting portion 15 is provided. The outer peripheral surface 16e of the lens 16a (the surface farther from the light-emitting portion 15) has a semicircular shape when viewed from the front or back (see FIG. 5(d)) and when cut along a plane perpendicular to the central axis ax2. In other words, the lens 16a includes a semicylindrical shape. In addition, the lens 16a has end faces 16c at both ends. The end faces 16c are flat.

[0041] In a cross section including the central axis ax2 (see FIG. 5(c)), the lens 16a has an arc shape in which the outer peripheral surface 16e is convex in a direction away from the light emitting unit 15. Therefore, the outer peripheral surface 16e can impart a lens effect to a cross section (cross section parallel to the central axis ax2) having a lens effect due to a part of the cylindrical shape, and the lens 16a can be made thinner by forming it into a Fresnel lens shape.

[0042] Returning to the explanation of Figures 3 and 4, below, the direction perpendicular to the plate-shaped portion 12 (the direction along the central axis ax3 of the plate-shaped portion 12) is defined as the u direction, and the directions perpendicular to the u direction are defined as the v direction and the w direction. The v direction is a direction along the horizontal direction, and is the same as the y direction. The u direction and the optical axis op1 are the same direction, and the direction in which the center of the light beam emitted from the light-emitting portion 15 faces is defined as the +u direction.

[0043] Here, a ray means a line indicating the path of light, a bundle of rays means a collection of rays, and an optical axis means a representative ray of a bundle of rays, here the central axis of the bundle of rays.

[0044] The optical component 16 is disposed so that the central axis ax2 is along the v direction (i.e., the horizontal direction). The three light source units 14 are disposed on the plate-shaped portion 12 so that the end faces 16c of the lenses 16a are parallel to each other. Therefore, many light source units 14 can be provided in a small area.

[0045] The light emitted from the light-emitting unit 15 is incident on the lens 16a within a range of angle θ1 centered on the optical axis op1. In this embodiment, the angle θ1 is approximately 60 degrees (approximately 60 degrees ±5 degrees). Since the lens 16a includes a part of a cylindrical shape with the central axis ax2 as the central axis, the light emitted from the light-emitting unit 15 spreads in a fan shape in the w direction centered on the optical axis op1 by the lens 16a.

[0046] 6 is a diagram showing a schematic diagram of the state of light projected from the light source unit 14. The light emitted from the light-emitting section 15 is diffused in a strip shape along a direction perpendicular to the central axis ax2 of the optical component 16. Moreover, the light emitted from the light-emitting section 15 is diffused while being slightly wider in the direction along the central axis ax2.

[0047] 7 is a diagram showing a schematic positional relationship between lighting fixture 10 (i.e., light source unit 14) and windsock unit 20 (windsock 21 and mounting part 22). Central axis ax3 of lighting fixture 10 is inclined with respect to central axis ax1 of windsock 21. Therefore, the center of the light beam emitted from light-emitting unit 15 heads in the +u direction, obliquely upward at a predetermined angle from the horizontal direction.

[0048] The w direction, which is along the plate-like portion 12 and perpendicular to the central axis ax2, is inclined with respect to the vertical direction (z direction). Since the light emitted from the light-emitting portion 15 spreads in a fan shape in the ±w direction around the optical axis op1, the light source unit 14 illuminates the upper side (+z side) of the streamer 21 in a band shape.

[0049] 8 is a diagram showing a schematic view of the range irradiated with light by lighting fixture 10 (i.e., light source unit 14). Light fixture 10 irradiates light in a band shape along central axis ax1 onto the upper side of windsock 21 (see the shaded area in FIG. 8).

[0050] According to this embodiment, lighting fixture 10 illuminates the upper side of windsock 21 in a band along central axis ax1 of windsock 21, thereby improving visibility from above at night. Furthermore, lighting fixture 10 directly illuminates windsock 21 from the inside, so windsock 21 is brightly illuminated. Therefore, pilots of airplanes and air traffic controllers in control towers can easily see windsock 21 from above and from a distance.

[0051] Furthermore, according to this embodiment, when the lighting fixture 10 (light source unit 14) is viewed along the central axis ax1, the center of the light beam is vertically below the central axis ax1 and points diagonally upward at a predetermined angle from the horizontal direction, so that the upper side of the streamer 21 can be reliably illuminated from the inside.

[0052] Furthermore, according to this embodiment, outer peripheral surface 16e has an arc shape that is convex in the direction away from light-emitting unit 15 in a cross section including central axis ax2, so that the light emitted from light-emitting unit 15 can be diffused in the direction along central axis ax2 and the width of the band illuminating the upper side of windsock 21 can be increased. Therefore, visibility from above windsock 21 is improved.

[0053] Furthermore, according to this embodiment, since multiple light source units 14 are arranged on plate-shaped portion 12 so that end faces 16c of lenses 16a are parallel, many light source units 14 can be provided in a small area. Also, all of the light emitted from multiple light source units 14 can be spread in direction w. Therefore, the amount of light emitted from lighting fixture 10 can be increased, the upper side of windsock 21 can be illuminated more brightly, and the visibility of windsock 21 can be improved.

[0054] In the present embodiment, lighting fixture 10 has main body portion 11, plate-shaped portion 12, shade portion 13, and light source unit 14, but the configuration of lighting fixture 10 is not limited to this. For example, shade portion 13 is not essential. For example, lighting fixture 10A shown in FIG. 9, which does not have shade portion 13, can achieve the same effects as lighting fixture 10. Furthermore, main body portion 11 and plate-shaped portion 12 are not essential, and the lighting fixture may have only one light source unit 14 and a unit (not shown) including its drive circuit.

[0055] In addition, in the present embodiment, the light source units 14 are arranged in the lighting device 10 with being shifted in the w direction, but the arrangement of the light source units 14 is not limited to this. For example, similar effects can be obtained even if the positions of the light source units 14 in the w direction are the same as in the lighting device 10B shown in Fig. 10.

[0056] In the present embodiment, the outer peripheral surface 16e has a semicircular shape when viewed from the front or back (the shape when cut along a plane perpendicular to the central axis ax2), but the shape of the optical component 16 is not limited to this. Fig. 11 shows an enlarged view of an optical component 16A according to a modified example, where (a) is a perspective view, (b) is a view as viewed from an arrow B in (a), (c) is a view as viewed from an arrow F in (a) (a) (a perspective view viewed from diagonally above), (d) is a view as viewed from an arrow D in (b), (e) is a view as viewed from an arrow E in (a), and (f) is a cross-sectional view at plane p.

[0057] The optical component 16A mainly includes a lens 16g and a mounting portion 16b. The lens 16g is different from the lens 16a in that the lens 16g has a flat surface 16h, but is otherwise identical to the lens 16a.

[0058] The flat surfaces 16h are provided on both ends of the lens 16g substantially along the central axis ax2. The flat surfaces 16h are provided outside the range into which the light emitted from the light-emitting unit 15 enters, that is, the range of an angle θ1 centered on the optical axis op1. Therefore, the light emitted from the light-emitting unit 15 spreads in a fan shape centered on the optical axis op1 by the lens 16g.

[0059] In addition, in the present embodiment, the light source units 14 (light-emitting parts 15 and optical parts 16) are arranged in the v direction, but the light-emitting parts 15 and the optical parts 16 may be arranged in the w direction. In particular, when a lens 16g having a flat surface 16h is used, it is suitable to arrange the lenses 16g in the v direction. FIG. 12 is a diagram showing the arrangement of the light source units 14A and 14B of the lighting fixture 10C according to the modified example (the main body part 11, the plate-shaped part 12, and the umbrella part 13 are not shown). The light source unit 14A includes the optical part 16A. The light source unit 14B includes the optical part 16C in which two lenses 16g are integrated in the w direction. In the lighting fixture 10C, the light source unit 14B is arranged in the center in the v direction, as an example. In the optical part 16C, each of the lenses 16g has a cavity 16d, and a light-emitting part 15 is provided in each cavity 16d. This allows more light-emitting parts 15 to be used, and the amount of light irradiated from the lighting fixture 10B can be increased.

[0060] In this embodiment, the lens 16a has an outer peripheral surface 16e formed into a Fresnel lens shape by dividing a convex lens shape into a plurality of sawtooth regions when viewed from a direction perpendicular to the central axis ax2, and has some lens action in a cross section parallel to the central axis ax2, but the outer peripheral surface 16e is not essential. For example, the lens may have a simple semi-cylindrical shape as in the optical component 16C shown in FIG. 13. In this case, the lens does not have a lens action in a cross section parallel to the central axis ax2.

[0061] In the present embodiment, the central axis ax3 of lighting fixture 10 is inclined with respect to the central axis ax1 of streamer 21, and the center of the light beam emitted from light-emitting unit 15 is directed obliquely upward at a predetermined angle from the horizontal direction, but the arrangement of lighting fixture 10 is not limited to this. For example, in Fig. 7, the angle at which the center of the light beam emitted from light-emitting unit 15 is directed obliquely upward from the horizontal direction (the inclination angle of central axis ax3 with respect to the horizontal direction) is about 30 degrees, but this angle is not limited to 30 degrees.

[0062] Also, for example, the lighting fixture 10 may be provided so that the central axis ax3 and the central axis ax1 are parallel, that is, the center of the light beam emitted from the light-emitting unit 15 faces the horizontal direction. FIG. 14 is a diagram showing the arrangement of the lighting fixture 10 and the windsock unit 20A in a modified example. In the windsock unit 20A, the lighting fixture 10 (i.e., the light source unit 14) is provided so that the center of the light beam faces the horizontal direction. In the windsock unit 20A, the lighting fixture 10 (i.e., the light source unit 14) is provided vertically above the central axis ax1 when viewed along the central axis ax1. Therefore, in the windsock unit 20A as well, the lighting fixture 10 illuminates the upper side of the windsock 21 in a strip shape, and visibility from above at night can be improved.

[0063] However, it is not essential that lighting fixture 10 is provided vertically above central axis ax1 when viewed along central axis ax1. Even if lighting fixture 10 is provided at a low position, when there is no strong wind and windsock 21 is not blown up by the wind, lighting fixture 10 can illuminate the upper side of windsock 21 in a strip shape, thereby improving visibility from above at night.

[0064] Although the embodiment of the present invention has been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like within the scope of the gist of the present invention are also included. In addition, in the present invention, "approximately" is a concept that includes not only cases where something is strictly the same, but also errors and modifications to the extent that the sameness is not lost. [Explanation of symbols]

[0065] 1:Wind direction display device 2: Orthogonal 10, 10A, 10B, 10C: Lighting equipment 11: Main body 11a: Mounting part 12: Plate-shaped part 12a: Surface 13: Umbrella part 14, 14A, 14B: Light source unit 15: Light emitting part 15a: Substrate 15b: Light emitting element 16, 16A, 16C: Optical components 16a, 16g: Lenses 16b: Mounting part 16c: End face 16d: Cavity 16e: Outer surface 16h: Plane 20, 20A: Windsock unit 21: Streamers 22: Mounting part 22a: Frame 22b, 22c: Rotating device 22d: Mounting arm 22m: Ring 22n: Ring 22o, 22p: Connection part 22q: Rod-shaped part 30: Strut part 31: Strut 32: Foundation 33: Arm 40: Aviation obstruction lights 50:Circular strip lighting 100:Wind direction light

Claims

1. A wind direction display device installed on a support column, A cylindrical windsock, An attachment part for connecting the windsock and the support column, the attachment part having a cylindrical frame provided at one end of the windsock, A lighting fixture is provided in the aforementioned mounting portion and illuminates the inner surface of the windsock with light, Equipped with, The aforementioned lighting fixture has a light source unit comprising a light-emitting part and an optical component having a cavity inside which the light-emitting part is provided, The optical component has a lens that includes a part of a cylindrical shape with a first central axis aligned horizontally as its central axis, The light source unit is positioned such that, when viewed along the second central axis, which is the central axis of the frame, it overlaps with the hollow portion of the frame, and the center of the light beam emitted from the light-emitting part is directed horizontally or diagonally upward at a predetermined angle from the horizontal. A wind direction display device characterized by the following features.

2. The lens has an arc shape in which the surface on the side farther from the light-emitting portion is convex in the direction away from the light-emitting portion, in a cross-section including the first central axis. The wind direction display device according to feature 1.

3. The light source unit is positioned so that, when viewed along the second central axis, it is located vertically below the second central axis, and the center of the light beam is directed diagonally upward at a predetermined angle from the horizontal. The wind direction display device according to claim 1 or 2.

4. The lighting fixture has a plate-shaped portion on which a plurality of the light source units are provided, Multiple light source units are arranged such that their end faces, perpendicular to the first central axis of the lens, are parallel to each other. The wind direction display device according to claim 1 or 2.

Images