JPS649684B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a floodlight fixture using a long lamp.

[Prior Art] Generally, in a floodlight fixture, a focused luminous flux is obtained by placing a lamp at the focal point of a reflector. However, there is a problem in that the lamp light emission center position varies due to the inclination of the lamp socket when the lamp is installed, the sagging of the lamp due to its own weight, etc., and the desired set light distribution cannot be obtained in many cases.

[Problems to be Solved by the Invention] The present invention has been provided in view of the above-mentioned points, and provides a floodlighting device whose purpose is to prevent variations in light distribution due to defocus of the lamp. It is something.

[Means for Solving the Problems] [Operation] The present invention provides a gutter-shaped parabolic main reflector, side reflectors attached to both ends of the main reflector, and a structure between the both side reflectors. The auxiliary reflector is installed at a position closer to the lamp than the main reflector, and is integrally formed with an auxiliary reflector that controls light other than that controlled by the main reflector. Attach a plurality of annular support fittings to the auxiliary reflector, insert a long single-end lamp into the support fittings, and attach a plurality of annular support fittings to the inner circle side of the support fittings to draw an inscribed circle. A plurality of lamp supports draw an inscribed circle by fixing the lamp support to the support so that when a long lamp is supported on the lamp support, the lamp is at the focal point of the main reflector. The lamp is supported by the lamp to eliminate variations in light distribution due to lamp sagging due to the lamp's own weight or displacement due to lamp replacement.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. A lamp 1 is arranged at a focal point 8 of a gutter-shaped main reflecting plate 2, and has a parabolic shape. The light from the lamp 1 projected onto the main reflector 2 is reflected by the main reflector 2.
The reflected light becomes a light flux controlled by the main reflecting plate 2 and is projected forward. The auxiliary reflector 3 is arranged approximately symmetrically with respect to the focal point 8 of the main reflector 2, and reflects the forward light from the lamp 1 toward the main reflector 2, thereby controlling the main reflector 2. The light flux is directed in the same direction as the light flux. Note that γ ₁ ° and γ ₂ ° in FIG. 1 are the ranges controlled by the auxiliary reflector 3. Side reflectors 4 are formed at both ends of the main reflector 2 to close both ends. Two auxiliary reflectors 3, 3 are installed approximately in parallel between the both side reflectors 4, 4, and one end of the auxiliary reflector 3, the side reflector 4, and the main reflector 2 form an integral structure. A socket 10 for the lamp 1 and a socket tube 11 disposed around the socket 10 are attached to the side reflector 4 on the other end side of the auxiliary reflector 3.

In the figure, reference numeral 5 denotes an annular support fitting, and from the inner circle side of this support fitting 5, three lamp supports 6 made of asbestos protrude and are screwed. A long lamp 1 is inserted into the inscribed circle of the three lamp supports 6 to fix the lamp 1. That is, the lamp support 6
The outer circumferential surface of the lamp 1 presses against the outer circumferential surface of the lamp 1. Furthermore, as shown in FIG. 3, the auxiliary reflector 3 and the supporting metal fitting 5 are fixed by providing an insertion hole in the supporting metal 5 that has the cross-sectional shape of the auxiliary reflecting plate 3, and inserting the auxiliary reflective plate 3 into this insertion hole. A support fitting 5 is fixed to the auxiliary reflecting plate 3. These supporting metal fittings 5 and lamp supporting fittings 6
The lamp 1 is attached to the auxiliary reflector 3 so that the focal point 8 of the main reflector 2 is located when the lamp 1 is installed in the socket 10.

[Effects of the Invention] As described above, the present invention includes a gutter-shaped and parabolic main reflector, side reflectors attached to both ends of the main reflector, and a main reflector between the both side reflectors. A plate-like annular support that is installed at a position closer to the lamp and is integrally formed with an auxiliary reflector that controls light other than that controlled by the main reflector, and is annular and perpendicular to the longitudinal direction of the lamp. A plurality of lamp supports are attached to an auxiliary reflector plate, a long single-end lamp is inserted into the support metal fittings, and the plurality of lamp supports protrude toward the inner circle side of the support metal fittings to draw an inscribed circle. is fixed to the support so that when a long lamp is supported on the lamp support, the lamp will be at the focal point of the main reflector, so multiple lamps forming an inscribed circle By supporting the lamp with a support, it is possible to eliminate variations in light distribution due to lamp sagging due to the lamp's own weight or misalignment due to lamp replacement. Therefore, the lamp is always maintained at the focal point of the main reflector. In particular, even if the lamp is of a single-ended type, it can support the longitudinal middle part of the lamp and prevent the lamp from shifting from the focal point of the main reflector. In addition, a plate-shaped, annular support fitting perpendicular to the longitudinal direction of the lamp is attached to the auxiliary reflection plate installed close to the lamp between the side reflection plates at both ends, and the lamp is supported by the support fitting, so the auxiliary reflection plate is installed close to the lamp. The supporting metal fittings attached to the plate are small and shaped like a plate that is perpendicular to the longitudinal direction of the lamp, so even if it supports the middle part of the lamp, it does not interfere with the irradiation of light from the lamp. Because the reflector and side reflector are integrally formed and the lamp support is attached to the auxiliary reflector, the lamp is always at the focus of the main reflector, compared to a lamp support that is provided separately. This has the effect of being retained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a perspective view of a main part of the support fitting. 1 is a lamp, 2 is a main reflector, 3 is an auxiliary reflector,
4 is a side reflector, 5 is a supporting metal fitting, 6 is a lamp support, and 8 is a focal point.

Claims (1)

[Claims] 1 A gutter-shaped parabolic main reflector, a side reflector attached to both ends of the main reflector, and a main reflector installed between the both side reflectors at a position closer to the lamp than the main reflector. An auxiliary reflector that controls light other than that controlled by the reflector is integrally formed, and a plurality of annular plate-shaped support fittings that are annular and perpendicular to the longitudinal direction of the lamp are attached to the auxiliary reflector; When a long lamp with a single-ended mold is inserted into the above-mentioned support fitting, and a plurality of lamp supports protrude to the inner circle side of the support fitting and draw an inscribed circle, the lamp is supported by the lamp supports. A floodlight fixture in which the lamp is fixed to a support fitting so that it is positioned at the focal point of the main reflector.