JPH0727008U - Lighting equipment with variable irradiation range - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a lighting device with a variable irradiation range that can adjust the irradiation range and illuminance without changing the irradiation direction. [Structure] A lamp body 4 accommodating a lamp 2 and a first reflecting mirror 3 is arranged at a lower end portion of an upright pillar 1. The first reflecting mirror 3 collects the light of the lamp 2 and reflects the light upward as substantially parallel light. The light reflected by the first reflecting mirror 3 is reflected by the second reflecting mirror 5 disposed on the upper part of the support column 1 so as to face the lamp 2.
As a result, the light is diffused and reflected downward and is irradiated around the pillar 1. The second reflecting mirror 5 is arranged so as to be movable up and down along the column 1. Therefore, the distance between the lamp 2 and the second reflecting mirror 5 can be changed by moving up and down the second reflecting mirror 5. As a result, the irradiation range and illuminance can be adjusted without changing the irradiation direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lighting device having a variable irradiation range arranged in a park or a street.

[0002]

[Prior art]

 BACKGROUND ART Conventionally, there is a lighting device having a variable irradiation range arranged in a park or a street as shown in FIG. In this luminaire, a lamp body 4 in which a lamp and a reflecting mirror are installed is arranged at an upper end of a vertically mounted pillar 1, and the lamp is reflected upward by the reflecting mirror. This light is reflected downward by the movable reflecting mirror 15 arranged above the lamp body 4 and is radiated to the periphery of the column 1. Here, the substantially disk-shaped movable reflecting mirror 15 is rotatably supported in the vertical direction by two supporting pieces 16, 16 provided on the lamp body 4 at its peripheral end portion. Therefore, by rotating the movable reflecting mirror 15 in the vertical direction, the irradiation range and illuminance can be adjusted.

[0003]

[Problems to be solved by the device]

 However, in the above-described conventional configuration, when the movable reflecting mirror 15 is rotated in the vertical direction, the irradiation direction also changes, and when trying to irradiate a wide range beyond a certain level, the irradiation is not performed in the vicinity of the column 1. . The present invention has been made in view of the above problems, and an object of the present invention is to provide an illumination range variable luminaire that can adjust the illumination range and illuminance without changing the illumination direction.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention has a pillar vertically installed, a lamp attached to the lower part of the pillar, a first reflecting mirror for reflecting the light of the lamp upward, and an upper part of the pillar. A second reflecting mirror arranged facing the lamp and diffusing substantially all of the reflected light reflected by the first reflecting mirror downward; and a variable means for changing the distance between the second reflecting mirror and the lamp. It is characterized by comprising.

[0005]

[Action]

 According to the configuration of the present invention, the upright column, the lamp attached to the lower part of the column, the first reflecting mirror that reflects the light of the lamp upward, and the lamp disposed above the column so as to face the lamp. Since a second reflecting mirror is provided which diffuses substantially all of the reflected light reflected by the first reflecting mirror and a variable means for changing the distance between the second reflecting mirror and the lamp, The lamp of 1 reflects the light of the lamp upward, and the second mirror of the upper part of the column spreads almost all the reflected light reflected upward by the first mirror downward. Not only to illuminate the periphery of the column, but also to change the distance between the lamp and the second reflecting mirror by the variable means, the irradiation range around the column can be changed between the lamp and the second reflecting mirror. It can be changed according to the distance.

[0006]

【Example】

 (Example 1) Fig. 1 shows a schematic view of an illumination range variable type lighting fixture in this example. As shown in FIG. 1, a lamp body 4 accommodating a lamp 2 and a first reflecting mirror 3 is arranged at a lower end portion of an upright pillar 1. The first reflecting mirror 3 is a parabolic mirror that collects the light of the lamp 2 and reflects it upwards as substantially parallel light. Further, the reflected light of the first reflecting mirror 3 is diffused and reflected downward by the second reflecting mirror 5 provided on the upper portion of the supporting column 1 so as to face the lamp 2, and is irradiated around the supporting column 1. Of. The second reflecting mirror 5 is a convex mirror, and is arranged so as to be vertically movable along the support column 1. However, the reflecting mirror 5 may be formed by combining a concave mirror or a plurality of plane mirrors into a substantially V-shape or a substantially U-shape in addition to the convex mirror.

Here, FIG. 2 shows an elevating mechanism for the second reflecting mirror 5 in this embodiment. As shown in FIG. 2, the inside of the pillar 1 is hollow, and a slit 1a is provided on one side surface from the vicinity of the upper end along the longitudinal direction of the pillar 1. A support portion 5b that supports the mirror portion 5a of the second reflecting mirror 5 is inserted through the slit 1a. Further, a pulley 6 is rotatably supported at the upper end portion inside the column 1, and a pulley 7 is rotatably supported also at a lower portion inside the column 1. Then, a rope body 8 such as a rope is stretched over both pulleys 6 and 7, and both pulleys 6 and 7 can be integrally rotated in the same direction by this cord body 8. Further, the end of the support portion 5b on the inner side of the support column 1 is attached and fixed to the cord body 8. Therefore, by rotating the lower pulley 7 by a motor (not shown) or manually, the string 8 is moved up and down along the column 1, and the second reflecting mirror 5 fixed to the string 8 is moved up and down. It can be done.

That is, the distance between the lamp 2 and the second reflecting mirror 5 can be changed by raising and lowering the second reflecting mirror 5 by the above-mentioned lifting mechanism, and the second reflecting mirror 5 is placed above the pillar 1. The second reflecting mirror 5 to lower the illuminance while increasing the irradiation range, or to position the second reflecting mirror 5 at the lower part of the support 1 to narrow the irradiation range and increase the illuminance. The irradiation range and illuminance can be adjusted depending on the height of the position.

The lifting mechanism of the second reflecting mirror 5 is not limited to that of this embodiment, and the technical idea of the present invention can be applied to various other lifting mechanisms. (Example 2) FIG. 3 shows a schematic view of an illumination range variable type lighting fixture in this example. Since this embodiment has a basic configuration in common with the first embodiment, the common portions are denoted by the same reference numerals and the description thereof will be omitted.

The illumination range variable type luminaire of the present embodiment is different from that of the first embodiment in that the second reflecting mirror 5 is fixed to the upper part of the supporting column 1 and the expansion / contraction mechanism provided in the supporting column 1 allows The second reflecting mirror 5 moves up and down together with the support 1. An example of the expansion and contraction mechanism of the column 1 is shown in FIG. As shown in FIG. 4, the column 1 is composed of two cylinders 9 and 10, and a cylinder 9 having a larger diameter is erected and a cylinder 10 having a smaller diameter is inserted therein. A rack 10a is provided on the inner surface of the small-diameter cylinder 10, and a pinion 11 that meshes with the rack 10a is rotatably supported by a large-diameter cylinder 9, and the shaft 11a of the pinion 11 has a small diameter. It is inserted into a slit (not shown) provided along the longitudinal direction of the cylinder 10.

A belt wheel 12 is rotatably supported inside a large-diameter cylinder 9, and a belt wheel 11 b fixed to a shaft 11 a of a pinion 11 is provided with a belt 13 hung on the belt wheel 12. The rotation of the belt wheel 12 is transmitted via the belt 13 to the belt wheel 11b fixed to the shaft 11a of the pinion 11, and the rotation of the pinion 11 is converted into vertical movement by the rack 10a, thereby reducing the small diameter. The cylinder 10 is moved up and down, and the support 1 is expanded and contracted accordingly. Therefore, by rotating the belt wheel 12 by a motor (not shown) or manually, the small-diameter cylinder 10 is moved in the vertical direction to expand and contract the support column 1, and the second reflecting mirror mounted on the upper part of the small-diameter cylinder 10 is moved. It is possible to change the distance between the lamp 5 and the lamp 2 of the lamp body 4 arranged below the large diameter cylinder 9.

In the first and second embodiments, the first reflecting mirror 3 is a parabolic mirror, but when the second reflecting mirror 5 is at the highest position, the first reflecting mirror 3 is used. The first reflecting mirror 3 may be a reflecting mirror other than a parabolic mirror as long as it is a reflecting mirror that diffuses the light of the lamp 2 so that substantially all of the reflected light is reflected downward. Further, the lamp body 4 is arranged at the lower end portion of the upright pillar 1, but the present invention is not limited to this, and may be any position below the second reflecting mirror 5, for example, the center of the pillar 1. The lamp body 4 may be arranged above the portion.

[0013]

[Effect of device]

 According to the present invention, an upright pillar, a lamp attached to the lower part of the pillar, a first reflecting mirror for reflecting the light of the lamp upward, and a lamp mounted on the upper part of the pillar so as to face the lamp. Since the second reflecting mirror for diffusing substantially all of the reflected light reflected by the first reflecting mirror and the variable means for changing the distance between the second reflecting mirror and the lamp are provided, the first reflecting mirror is provided. The reflector reflects the light of the lamp upwards, and the second reflector located above the pillar diffuses the light reflected by the first reflector downwards to illuminate the area around the pillar. Not only that, but the distance between the lamp and the second reflecting mirror can be changed by the variable means. As a result, it is possible to effectively use the light of the lamp and adjust the irradiation range and illuminance around the support pillar to an optimum illumination state according to the purpose of use without changing the irradiation direction. Also, since the lamp is attached to the lower part of the column, there is an effect that maintenance management such as replacement, inspection and cleaning of the lamp can be easily performed. Further, since only the second reflecting mirror is provided on the upper part of the pillar, there is an effect that the upper part of the pillar can be lightened and the construction can be facilitated.

[Brief description of drawings]

FIG. 1 is a schematic diagram illustrating a first embodiment.

FIG. 2 is a side sectional view showing a main part of the same.

FIG. 3 is a schematic diagram showing a second embodiment.

FIG. 4 is a side sectional view showing a main part of the same.

FIG. 5 is a schematic view showing a conventional example.

[Explanation of symbols]

 1 Support 2 Lamp 3 First Reflector 4 Lamp Main Body 5 Second Reflector

Claims (1)

[Scope of utility model registration request] 1. An upright pillar, a lamp attached to the lower part of the pillar, a first reflecting mirror for reflecting the light of the lamp upward, and an upper part of the pillar facing the lamp. A second reflecting mirror for diffusing substantially all of the reflected light reflected by the first reflecting mirror downward, and variable means for changing the distance between the second reflecting mirror and the lamp. A lighting fixture with a variable irradiation range.