JP2002042504A - Aircraft obstruction light - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent light pollution by concentrating lights in the horizontal and the upper direction and to improve a luminous efficiency. SOLUTION: This aircraft obstruction light is equipped with a mirror (1) whose section is parabolic, an auxiliary reflective mirror (5) that is positioned inside the mirror (1) and that has a reflective surface smaller than the mirror (1), a slender light source (3) that is positioned near the focus of the auxiliary reflective mirror (5) and the mirror (1), and a case (4) that accommodates the light source (3), the mirror (1) and auxiliary reflective mirror (5). The auxiliary reflective mirror (5) is positioned oppositely to the mirror (1) with the light source (3) in between, the case (4) has an opening (4a) formed in the position that is the horizontal reflection of the mirror (1), the auxiliary reflecting mirror (5) is positioned between the opening (4a) and the light source (3), thus, light does not reflect lower than the horizontal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention belongs to an aviation obstruction light which is installed in a high-rise building and illuminates and indicates the presence of an obstacle in order to ensure the safety of air operations such as helicopters and aircraft.

[0002]

2. Description of the Related Art In recent years, with the progress of construction technology, high-rise buildings,
As buildings such as power transmission towers, chimneys, and chemical plant towers are becoming higher and higher, it is obligatory to install aviation obstruction lights on high-rise buildings so that helicopters and aircraft can safely navigate. The aviation obstruction light is installed on a high-rise building to make a pilot such as a helicopter or the like aware of the existence of the high-rise building by flashing light or immobile light, especially at night, and to ensure navigation safety. Conventional aviation obstruction light (20) shown in FIGS. 6 and 7
Is a mirror body (11) having a semi-elliptical cross section, an elongated rod-shaped light source (3) arranged inside the focal point of the shape formed by the mirror body (11), a mirror body (11) and a light source ( 3) and a case (14) having an opening (14a) formed at a position to be a horizontal projection surface of the mirror (12). A pair of sides (1
4b), a pair of ends (3a) of the light source (3) are fixed, and side portions (14b)
A mirror body (11) is formed therebetween in parallel with the length direction of the light source (3). Light emitted from the light source (3) is divided into light emitted directly from the opening (14a) covered with the transparent plate to the outside of the case (14) and light emitted to the mirror (11). The mirror body (11) having received the light from the light source (3) reflects the light in a substantially horizontal direction and emits the light from the opening (14a) to the outside of the case (14). Thus, the direct light from the light source (3) emitted from the aviation obstruction light and the reflected light from the mirror (11) are mixed to demonstrate the existence of a high-rise building with the aviation obstruction light installed .

[0003]

The aviation obstruction light installed on a high-rise building preferably emits light upward and horizontally because a helicopter or the like flies at a higher position than the high-rise building. The lamp (20) also emits light below the horizontal direction. FIG. 8 is a graph in which the amount of light emitted from the aviation obstacle light (20) is measured at different measurement positions in the height direction. As shown in FIG. 8, in the aviation obstacle light (20), the same amount of light is detected below and above the horizontal direction, which causes light pollution on the ground where the light is irradiated. Also, the amount of light in the upward and horizontal directions is reduced by the amount of downward light that does not need to be lit. Therefore, the present invention concentrates light only above the horizontal direction to prevent light pollution,
An object of the present invention is to provide an aviation obstacle light that improves luminous efficiency.

[0004]

An aviation obstruction light according to the present invention comprises a mirror body (1) having a parabolic cross section, and a reflecting surface arranged inside the mirror body (1) and smaller than the mirror body (1). Auxiliary reflector (5) having an elongated reflector (5) disposed near the focal point of the auxiliary reflector (5) and the mirror (1), a light source (3), the mirror (1) and the auxiliary reflector (5) for accommodating (5). The auxiliary reflecting mirror (5) is disposed to face the mirror (1) with the light source (3) interposed therebetween, and the case (4) is formed at a position to be a horizontal projection surface of the mirror (1). It has an opening (4a), and the auxiliary reflector (5) has an opening
It is arranged between (4a) and the light source (3). The light emitted from the light source (3) is 1) directly from the light source (3), 2) reflected by the mirror (1), or 3) reflected by the auxiliary reflecting mirror (5) and the mirror (1) Thereafter, the light is efficiently emitted to the outside of the mirror body (1) through the opening (4a). The mirror body (1) having a parabolic cross section receives light from near the light source (3) and reflects horizontal parallel rays toward the opening (4a).

In an embodiment according to the present invention, an auxiliary reflecting mirror is provided.
(5) reflects the light received from the light source (3) toward the vicinity of the light source (3), and the mirror (1) transmits the light from the auxiliary reflecting mirror (5) and the light source (3) to the opening ( Reflects horizontally toward the outside of 4a). Also,
The auxiliary reflecting mirror (5) has a linear cross section or an arc-shaped or elliptical arc-shaped cross section focused on the light source (3), and is disposed below the center (4c) of the opening (4a). Center of opening (4a) (4c)
The auxiliary reflecting mirror (5) disposed below reflects light traveling toward the lower half of the opening (4a) toward the mirror (1), and the mirror (1) reflects the received light in a substantially horizontal direction. And is emitted to the outside through the opening (4a). Therefore, unnecessary light emitted to the outside downward from the horizontal direction is reflected upward by the auxiliary reflecting mirror (5), and only the light in the horizontal direction and upward is efficiently and externally emitted from the opening (4a). It emits light with high brightness and can improve the intensity of light emitted from the aviation obstacle light. In this case, when observing from a distance the light of the aviation obstruction light emitted horizontally from the opening (4a) with the highest light intensity, make sure that the observer is in a substantially horizontal position with respect to the aviation obstruction light. Can be
When observing the relatively weak light intensity of the aviation obstruction light from a distance, the observer can confirm that the observer is at a higher position than the aviation obstruction light. Since the light from the light source (3) passing through the opening (4a) hardly includes the downward component, when the light of the aviation obstruction light cannot be observed at all from a distance, the observer is positioned below the aviation obstruction light. Can be confirmed.

The light source (3) and the auxiliary reflecting mirror (5) are arranged at a certain interval and in parallel with the mirror (1), and a pair of ends (3a) of the light source (3) and the auxiliary reflecting mirror are provided. A pair of ends (5a) of the mirror (5)
Are fixed to a pair of side portions (4b) of the case (4).

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an aviation obstruction light according to the present invention will be described below with reference to FIGS. 1 and 2
In the aviation obstruction light (10) shown in (1), a mirror (1) having a parabolic cross-section, and an auxiliary reflector (5) disposed inside the mirror (1) and having a reflection surface smaller than the mirror (1). ) And an elongated rod-like light source (3) placed near the focal point of the auxiliary reflector (5) and the mirror (1)
And The auxiliary reflector (5) is a mirror body with the light source (3)
60-1 which is arranged opposite to (1) and has a light source (3) as a focal point
It is formed in any circular cross section of 80 °. The auxiliary reflecting mirror (5) shown in FIG.
2 shows an arc-shaped cross section of FIG. As the light source (3), for example, a xenon flashlight having a diameter of 2 mm, a length of 600 mm and a maximum luminous intensity of 1200 cd is used. Xenon flash light emits high-luminance white light, has high luminous efficiency, and has a long life. light source
The position of (3) may be the focus of a parabola formed by the mirror (1), but if the length from the mirror (1) to the focus is d, d
The light source (3) can be arranged within a range of 1.2d. If the position of the light source (3) is less than d, the light reflected by the mirror (3) and emitted to the outside is diffused, and the directivity of the light is reduced. When the distance is more than d, the light converges, and when it exceeds 1.2 d, the converged light is undesirably diffused again as the distance from the aviation obstacle light (10) increases.

The light source (3), the mirror body (1) and the auxiliary reflecting mirror (5)
The case (4) is housed inside a case (4) formed of stainless steel or the like, and the case (4) has a rectangular opening (4a) covered with a transparent plate at a position to be a horizontal projection surface of the mirror body (1). Have. Aperture
(4a) and the light source (3), and the auxiliary reflector (5) disposed below the center of the opening (4a) has a pair of end portions (5
a) is fixed to a pair of side portions (4b) inside the case (4). Further, a light source is applied to a pair of electrodes (not shown) formed on the side portion (4b).
The pair of ends (3a) of (3) is fixed. The auxiliary reflecting mirror (5) and the light source (3) are arranged in parallel with a certain interval between each other,
The mirror body (1) is formed in parallel with the length direction of the auxiliary reflecting mirror (5) and the light source (3).

The aviation obstruction light (10) according to the above embodiment is
The light source (3) is turned on by a lighting command from a power supply device (not shown) installed at another place. Lighted circular section light source
In (3), light emitted directly from the opening (4a) to the outside and light emitted to the mirror body (1) and the auxiliary reflecting mirror (5) are radiated radially. 90 from the center (4c) direction of the opening (4a) to the downward direction
The light of the light source (3) within the range of ° is irradiated to the auxiliary reflecting mirror (5), and is reflected toward the vicinity of the light source from the auxiliary reflecting mirror (5) arranged at a position where the light source (3) is substantially focused. Is done. The light that has passed near the light source (3), together with the direct light from the light source (3),
(1) is irradiated. Since the cross section of the mirror body (1) is formed in a parabolic shape with the light source (3) near the focal point, the mirror body (1) reflects the received light in the horizontal direction and passes through the opening (4a) to the outside. To be released. At the same time, direct light emitted horizontally and obliquely upward from the light source (3) is also emitted outside through the opening (4a). It is conceivable that the light reflected from the mirror body (1) is blocked by the auxiliary reflecting mirror (5) and the amount of light is partially reduced.
At an observation position somewhat distant from 0), the light sufficiently wraps around, so that a partial decrease in the amount of light can be ignored.

FIG. 3 is a graph showing the amount of light (luminous intensity) at different measurement positions in the height direction. In the conventional aviation obstruction light (20) shown in FIG. 7, light traveling downward from the opening (14a) is generated as shown in FIG. 8, whereas the aviation obstruction light (10) according to the present embodiment is: As shown in FIG. 3, light below the horizontal direction is not observed, and all light is irradiated above the horizontal direction. In this way, the diagonally downward light emitted directly to the outside is guided by the auxiliary reflector (5) to the mirror (1) on the inner surface of the case (4), so that the light is directed downward toward the nearby residential area and office. Irradiation light pollution can be prevented. Further, in the present embodiment shown in FIG. 3, since the light is not irradiated downward, the amount of light in the horizontal direction is larger and the directivity of the light is higher than in the related art, so that the pilot such as a helicopter can fly even from a distant position. The light of the obstruction light (10) can be checked, and accidents during operation can be prevented.

In the above embodiment, the auxiliary reflecting mirror (5) having a 90 ° arc-shaped cross section with the light source (3) as the focal point is shown in FIG. 2, but as shown in FIG. 4 and FIG. It may be formed in an arc-shaped cross section or a straight cross-section of °. Although not shown, an elliptical arc-shaped cross section may be used. In the embodiment shown in FIG. 4, the light reflected by the reflecting mirror (5) is reflected by the mirror body (1) to be a substantially horizontal light beam, and almost no downward light is generated. Also, without forming the auxiliary reflecting mirror (5) outside the light source (3),
A film-like auxiliary reflecting mirror (not shown) may be provided on the inner surface of (3).

In the above embodiment, FIGS. 2, 4 and 5
Mirror body with parabolic cross section vertically symmetric as shown in (1)
However, the sectional shape may be changed by dividing the mirror body (1) into upper and lower halves. Although not shown, for example, a mirror body
If the lower part of (1) has a parabolic cross section where the opening (4a) closes, the position of the light source (3) is separated from the focal point in the opposite direction to the mirror (1), so the lower part of the mirror (1) The light reflected by the light is directed upward, and the light emitted downward can be almost completely suppressed. On the other hand, when the mirror (1) is formed with a parabolic cross-section that forms a larger opening (4a) by increasing the opening angle of the mirror (1), the position of the light source (3) moves from the focal point to the mirror (1). ), And the light applied to the upper part of the mirror body (1) is reflected upward from the horizontal direction, so that the amount of light upward can be increased.

[0013]

As described above, the aviation obstruction light according to the present invention emits a large amount of light only above the horizontal direction, so that the safety of helicopters, airplanes, etc. in air operation can be reduced without causing light pollution. Can be planned.

[Brief description of the drawings]

1 is a perspective view of an aircraft obstacle light according to the present invention;

FIG. 2 is a sectional view taken along line AA shown in FIG.

FIG. 3 is a graph showing the amount of irradiation light.

FIG. 4 is a sectional view showing another embodiment of the present invention.

FIG. 5 is a sectional view showing still another embodiment according to the present invention.

FIG. 6 is a perspective view of a conventional aviation obstacle light.

FIG. 7 is a sectional view taken along line BB shown in FIG. 6;

FIG. 8 is a graph showing the amount of irradiation light.

[Explanation of symbols]

(1) ・ ・ Mirror, (3) ・ ・ Light source, (3a) ・ ・ End, (4)
・ ・ Case, (4a) ・ ・ Opening, (4b) ・ ・ Side, (4a)
c) · · · center, (5) · · · auxiliary reflector, (5a) · · · end,
(10) ・ Air obstacle light,

Claims (5)

[Claims] 1. A mirror body having a parabolic cross section, an auxiliary mirror disposed inside the mirror body and having a reflection surface smaller than the mirror body, and near the focal point of the auxiliary mirror and the mirror body. An elongated light source disposed therein, and a case accommodating the light source, the mirror body, and an auxiliary reflecting mirror, wherein the auxiliary reflecting mirror is arranged to face the mirror body with the light source interposed therebetween; An aviation obstruction light, comprising: an opening formed at a position serving as a horizontal projection surface of a mirror body, wherein the auxiliary reflecting mirror is disposed between the opening and the light source. 2. The auxiliary reflecting mirror reflects light received from the light source toward the vicinity of the light source, and the mirror body transmits light from the auxiliary reflecting mirror and the light source toward the outside of the opening. 2. The aviation obstruction light according to claim 1, which reflects horizontally. 3. The aviation obstruction light according to claim 1, wherein the auxiliary reflecting mirror has a linear cross section or an arc-shaped or elliptical arc-shaped cross section focused on the light source. 4. The aviation obstruction light according to claim 1, wherein the auxiliary reflector is disposed below a center of the opening. 5. The light source and the auxiliary reflecting mirror are arranged at a predetermined interval and in parallel with the mirror body, and a pair of ends of the light source and a pair of ends of the auxiliary reflecting mirror are The aviation obstruction light according to any one of claims 1 to 4, fixed to a pair of side portions of the case.