JPS6335441Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a rotating warning device that is equipped with a rotating light and a reflecting mirror that reflects light from the rotating light.

(B) Prior Art Conventionally, a rotating warning device is well known in which a rotating light is provided in the center of a concave mirror so that its axis of rotation coincides with the center line of the concave mirror (Japanese Patent Publication No. 49-9280). (see official bulletin).

In this conventional device, several large through holes are bored in the reflective surface of the concave mirror, but in recent years, in order to reduce the diameter of the concave mirror and make it more compact, devices without the through holes have appeared. There is. This is because when the diameter of the concave mirror is reduced, the reflection area becomes smaller, so if the through hole is present, the reflection area becomes smaller and the warning effect is extremely reduced.

However, if the concave mirror does not have a through hole, when the wind hits it from the front, the wind pressure will cause
There was a risk that the rotating warning device would easily fall over.

Additionally, since it becomes difficult for air to flow around the revolving light, the cooling effect of the revolving light is reduced, which shortens the lifespan of the light bulb inside the revolving light, resulting in the need for frequent replacement of the light bulb.

Incidentally, lighting fixtures with transparent holes in the reflective surface have already been proposed (for example, Utility Model Application No. 55-9086).
(Refer to Japanese Utility Model Publication No. 112428/1983).

However, since these lighting devices are used indoors, their industrial application field is different from that of the present invention, and since the reflective surface has through holes, the reflective area is limited. The problem of becoming smaller cannot be solved.

Furthermore, since the through holes are separated from the light bulb, air does not flow near the light bulb, and the cooling effect cannot be expected to be that great.

(C) Purpose of the invention The present invention has been made in view of the drawbacks of the prior art described above, and is a concave mirror that does not have the risk of easily tipping over due to wind pressure, even without providing a through hole in the reflective surface of the concave mirror. , which aims to realize a rotation warning device.

(d) Structure of the invention The present invention provides a rotating warning device in which a rotating light is provided at the center of a concave mirror so that its axis of rotation substantially coincides with the center line of the concave mirror. This rotating warning device is characterized in that it is provided with a through hole having a diameter smaller than the diameter of the rotating light, and that a ventilation path is formed between the bottom of the rotating light and a concave mirror.

(E) Embodiment Figures 1 to 3 show reference examples for explaining the present invention, in which Figure 1 is a partially sectional front view seen from the front, and Figure 2 is a rear view seen from the rear. , and FIG. 3 is a sectional view.

In these figures, reference numeral 1 denotes a support rod erected on the ground, etc., and a cylindrical holding stand 3 provided with an inner flange 2 is welded to the upper end of the support rod. A parabolic mirror 5 as a concave mirror with a through hole 4 bored in the center is fixed to the front surface of the inner flange 2 with bolts 6, 6. The through hole 4 has a diameter smaller than that of a rotating light 7, which will be described later. At the free ends of the bolts 6, 6,
A base 8 of the rotating light 7 is fixedly installed. At this time, a ventilation passage 9 is formed between the bottom of the base 8 and the edge of the through hole 4 so that the axis of rotation of the rotating light 7 coincides with the center line of the parabolic mirror 5. It is positioned so that Further, a U-shaped angle 10 is fixed to the rear surface of the inner flange 2, and a reflection plate 11 called a so-called generator is fixed to the rear surface of this angle 10. Note that a passage 12 through which air can flow is formed between this reflection plate 11 and the inside of the holding table 3.

A motor (not shown) is installed in the base 8 of the revolving light 7, and a rotating disk 13 is fixed to the rotating shaft. A pair of movable parabolic mirrors 15, 15 that revolve around the light bulb 14 are fixed to the rotating disk 13. Note that two movable parabolic mirrors 15, 15 are not necessarily required, and only one movable parabolic mirror 15 may be provided. In addition, the rotating light 7 has movable parabolic mirrors 15, 15 and a light bulb 14 integrated.
It may be of a so-called sealed beam type. 16 is a colored transparent globe that covers the movable parabolic mirrors 15, 15, etc.

When the revolving lamp 7 operates, its light beam is reflected and irradiated forward as shown by the two-dot chain line in FIGS. 1 and 3. On the other hand, since a reflection plate 11 is also provided on the rear surface of the holding table 3, the light rays irradiated from the rear are reflected back.

Moreover, the air flowing in from the front of the parabolic mirror 5 is
As shown by the solid arrow, the air passes through the ventilation path 9, the through hole 4, and the passage 12 in the holding table 3, and is exhausted to the rear.

Note that since the airflow from the rear flows forward along the curved rear surface of the parabolic mirror 5, it is not subjected to large wind pressure.

FIG. 4 is a sectional view showing the main parts of another reference example. The difference between this reference example and the previous reference example is that a lamp 17 as a light emitter facing backward is attached to the rear of the parabolic mirror 5 instead of the reflecting plate 11. In this figure, reference numeral 18 denotes a cylindrical lamp fixing base fixedly installed inside the holding base 3 with bolts 6, 6, and a plurality of through holes 19, 19 are bored in the circumferential side of the lamp fixing base 18. A protruding strip 2 provided around the lamp 17 is provided at the rear end of the lamp fixing base 18.
A concave line 21 is formed to engage with the convex line 20.
The lamp 17 is fixed to the lamp fixing base 1 by the grooved line 21.
It is fixed at 8.

Thus, the air flowing in from the front of the parabolic mirror 5 passes through the ventilation passage 9, the through hole 4, and the through holes 19, 19, and flows to the rear of the parabolic mirror 5, as in the previous embodiment. Exhausted.

Furthermore, when the lamp 17 is turned on, the spotlight will also be irradiated to the rear of the parabolic mirror 5.

(F) Effect of the invention In this invention, a through hole is opened in the center of the concave mirror that does not contribute to the reflection of the light beam reflected from the rotating lamp, and a ventilation path is created between the edge of the through hole and the rotating lamp. , the rotating warning device is less likely to topple over due to wind pressure.

Further, as described above, since the through-hole is provided in a portion of the concave mirror that does not contribute to reflection at all, the warning effect is not diminished.

Furthermore, since air flows very close to the rotating light, the rotating light is sufficiently cooled and the life of the light bulb can be extended.

Furthermore, since the through hole has a smaller diameter than the rotating light, when the rotating warning device is viewed from the front, the ventilation passage is not visible, resulting in an excellent design.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a front view, FIG. 2 is a rear view, and FIG. 3 is a sectional view. FIG. 4 is a sectional view showing the main parts of another embodiment. 3... Holding stand, 4... Through hole, 5... Parabolic mirror (concave mirror), 7... Rotating light, 9, 24... Ventilation path,
11...Reflector, 17...Lamp (light emitter).

Claims (1)

[Scope of utility model registration request] In a rotating warning device in which a rotating light is provided in the center of a concave mirror so that its axis of rotation substantially coincides with the center line of the concave mirror, a through hole having a diameter smaller than the diameter of the rotating light is provided in the center of the concave mirror. A rotating warning device characterized in that a rotating light is provided in front of the through hole, and a ventilation path is formed between the bottom of the rotating light and a concave mirror.