JP2013077491A - Color changer and lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color changer hardly having invasion of dust and dirt inside and a lighting fixture having the color changer.SOLUTION: The color changer 4 includes a body 11 which has an opening 17 through which light from a light source 5 passes, a filter holder frame 18 on incidence side which is provided in the opening 17, an emission side filter holder frame 19, and a barn door frame 20; a color filter 12 which is housed in the body 11 and is installed movably so that unit color filters 12a, 12b, 12c, ... may cross the opening 17; an operation control means 13 of the color filter 12 which is arranged in the body 11; an incidence side filter holder 14 and an emission side filter holder 15 which are installed respectively in the incidence side filter holder frame 18 and the emission side filter holder frame 19 of the body 11; and a barn door 16 which is attached and detached on and from the barn door frame 20.

Description

  Embodiments described herein relate generally to a color changer and a lighting fixture that change the color light of stage lighting such as a stage and a studio.

  This type of color changer is provided on the front side of the light source of the luminaire and allows the light-transmitting color filter to be wound or rewound by a drum driven by a motor so that light from the light source can be transmitted through the color filter. The color light of the transmitted light is changed. Then, position detection means such as a photo sensor detects a detection piece or a positioning marker provided on the color filter to control the driving of the motor.

  And since a color filter is formed with the colored polyester resin etc., it is known that static electricity will generate | occur | produce and it will be easily charged by the winding or unwinding. A color changer has been proposed in which the static eliminator for removing static electricity is provided so as to be close to or in contact with a color filter (see, for example, Patent Document 1). This color changer avoids malfunction of the photosensor due to, for example, discharge light discharged from the positioning marker to the motor.

  By the way, the color changer has an opening through which light from the light source passes through the color filter. External dust or dust enters the color changer from the opening and adheres to the color filter or photosensor. In particular, it is known that when a color filter is charged with static electricity, dust and dirt are likely to adhere.

Japanese Patent Laid-Open No. 11-144504 (2nd page, FIG. 1)

  Even if the color changer includes a static eliminator for removing static electricity, dust or dust enters from the opening and adheres to the color filter or photosensor. When dust or dust adheres to the color filter, there is a problem that the transmittance of the color filter is lowered and a problem occurs in winding and rewinding, resulting in color shift. Further, if dust or dirt adheres to the photosensor, the position of the color filter may not be detected.

  An object of the present embodiment is to provide a color changer in which dust or dust is less likely to enter and a lighting fixture including the color changer.

  The lighting fixture of the present embodiment includes a main body, a color filter, position detection means, an incident side filter holder, an emission side filter holder, and a band door.

  The main body is provided on each of an opening through which light from the light source passes, an incident-side filter holder frame provided on an incident side on which light from the light source of the opening enters, and an emission side on which light from the light source of the opening is emitted. An output side filter holder frame and a band door frame are formed.

  The color filter is composed of a plurality of unit color filters that are continuously formed in a strip shape. The color filter is housed in the main body, and the unit color filter is provided so as to be movable across the opening.

  The operation control means operates the color filter and is provided in the main body.

  The incident side filter holder and the emission side filter holder are mounted on the incident side filter holder frame and the emission side filter holder frame, respectively. The band door is attached to and detached from the band door frame.

  According to the embodiment of the present invention, the color changer is provided with the incident side filter holder frame and the emission side filter holder frame on the incident side and the emission side of the opening of the main body, respectively. Since the filter holder is mounted, it is difficult for dust and dirt to enter the main body from the outside, and it can be expected that dust and dirt are less likely to adhere to the color filter and the operation control means.

It is a schematic side view of the lighting fixture which shows embodiment of this invention. Similarly, it is a schematic front view of a lighting fixture. Similarly, it is a disassembled schematic perspective view of a color changer. Similarly, it is a partial development view of a color filter. Similarly, it is a schematic diagram of a color changer showing the arrangement position of the position detection means.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  The lighting fixture 1 of this embodiment is comprised as shown in FIG.1 and FIG.2, and a color changer is comprised as shown in FIGS. In FIG. 1, the lighting fixture 1 is configured as a spotlight, and includes a fixture main body 2, a support arm 3, and a color changer 4.

  The instrument body 2 is made of an aluminum alloy plate, one end side 2a is formed in a substantially rectangular tube shape having a large diameter, and a circular light projecting opening 5 (shown in FIG. 2) is provided on the end surface of the one end side 2a. A light source 6 is housed inside. The light source 6 includes a halogen lamp and a light emitting diode, and is provided so that emitted light is emitted from the light projection opening 5. As shown in FIG. 2, the light projection opening 5 is provided with a glass filter 7 with a stainless mesh.

  The support arm 3 is made of, for example, an aluminum alloy, is formed in a substantially U shape, and is attached to both side surfaces 2b and 2b (only one is shown in the figure) of the instrument body 2 as shown in FIG. The support arm 3 is attached with a bunker 8, and this bunker 8 is hooked and fixed to a baton 9 provided in a studio or the like. Thereby, the instrument main body 2 is suspended from the baton 9.

  The support arm 3 rotatably supports the instrument body 2 and can be fixed at a desired position so that the irradiation direction of the radiation emitted from the instrument body 2 can be changed.

  The color changer 4 is attached to the one end side 2 a of the instrument main body 2 so as to face the light projecting opening 5 by a joint 10 provided on the one end side 2 a of the instrument main body 2. As shown in FIGS. 3 to 5, the color changer 4 includes a main body 11, a color filter 12, a photo sensor 13, an incident side filter holder 14, an output side filter holder 15, and a bander 16. The photosensor 13 constitutes a part of an operation control unit as a position detection unit.

  In FIG. 3, the main body 11 is formed in a substantially box shape that can be disassembled, and is provided with a circular opening 17 penetrating the front surface 11a and the back surface 11b. When the color changer 4 is attached to the instrument main body 2, the opening 17 allows the light from the light source 6 to pass through the light projecting opening 5.

  An incident side filter holder frame 18 is provided on the rear surface 11 b of the main body 11 on the light incident side of the opening 17. The incident side filter holder frame 18 is formed inside the main body 11 and is formed in a frame body in which the color filter holder 14 is inserted and held from one direction (above) after the lid 11c is opened.

  Further, on the front surface 11 a of the main body 11, an emission side filter holder frame 19 and a band door frame 20 are provided on the light emission side of the opening 17. The exit side filter holder frame 19 and the band door frame 20 are respectively formed in a double frame body in which the exit side filter holder 15 and the band door 16 are inserted and held from one direction (above). It is attached to the front surface 11 a of the main body 11.

  The color filter 12 is a colored transparent film, and as shown in FIG. 4, a plurality of colors are divided in the longitudinal direction to constitute unit color filters 12a, 12b, 12c,. The unit color filters 12a, 12b, 12c,... Are continuously connected to form a belt shape. The unit color filters 12a, 12b, 12c,... Select, for example, a red part for transmitting light in red, a green part for green, a blue part for blue, and a transparent part for transmitting the transmitted light as necessary. In this embodiment, for example, 24 sheets of 24 colors are connected. These unit color filters 12a, 12b, 12c,... A detection hole 24 is provided above the unit color filter 12a on the start end side connected to the rotating drum 23 described later, that is, the unit color filter 12a for the first color.

  As shown in FIG. 5, the color filter 12 is housed in the main body 11 and connected to rotating drums 23 and 23 disposed in the main body 11. The rotary drums 23 and 23 are connected to a motor (not shown) which is an operation control means. The belt-like color filter 12 is connected to the rotating drums 23 and 23 at both ends. Then, the color filter 12 is wound around the rotating drum 23 in accordance with the driving of the motor and is rewound. That is, the color filter 12 is provided so as to be movable across the opening 17 of the main body 11.

  The photosensors 13 as position detection means (operation control means) are a pair, and are arranged in the main body 11 with the color filter 12 interposed therebetween. The pair of photosensors 13 and 13 includes a light emitting element and a light receiving element, respectively. Then, the position of the color filter 12 is detected by detecting, for example, infrared rays that pass through the detection hole 24 provided in the unit color filter 12a of the first color. That is, the unit color filter 12 a is the origin position of the color filter 12.

  When a selection signal for unit color filters 12a, 12b, 12c,... Of a predetermined color is sent to the color changer 4 from an external control device (not shown), the color changer 4 uses the unit color filter 12a as the origin position. The position from the origin position to the selected unit color filter 12a, 12b, 12c,... Is calculated, the movement distance is calculated, and the motor is driven based on the calculation result. Then, the unit color filters 12a, 12b, 12c,... Of predetermined colors are stopped at the position of the opening 17 of the main body 11 by stopping the driving of the motor. Thereby, the light of the desired light color selected from the opening 17 is emitted.

  In FIG. 3, the incident side filter holder 14 and the output side filter holder 15 are formed in a substantially square frame that is attached to the incident side filter holder frame 18 and the output side filter holder frame 19, respectively. The incident-side filter holder 14 and the output-side filter holder 15 accommodate a filter 14a and a filter 15b, respectively. The incident-side filter holder 14 and the output-side filter holder 15 are attached to the incident-side filter holder frame 18 and the output-side filter holder frame 19, respectively.

  When light of a desired light color is emitted from the opening 17 by the color filter 12 in the main body 11, the filter 14a and the filter 15b are colorless ones that pass the transmitted light as they are. When the color filter 12 cannot emit light of a desired light color from the opening 17, the filters 14a and 15b are used to convert the transmitted light into a desired light color, respectively.

  The band door 16 includes a band door main body 25 to be inserted into the band door frame 20, a wing attachment body 26 attached to the band door main body 25, and four wings 27a and 27b. The band-a body 25 is formed in a ring body that can be inserted into the band-a frame 21. The wing mounting body 26 is formed in a substantially square frame, and the wings 27a and 27b are rotatably mounted by a connector 28 and a screw 29 as shown in FIG.

  The wings 27a are formed in a rectangular flat plate and are attached to the upper and lower positions of the wing attachment body 26 in the drawing. The wings 27b are formed in a tapered flat plate and are attached to the left and right positions of the wing attachment body 26 in the drawing. By expanding the wings 27a and 27b and adjusting the opening area on the front end side of the band door 16, the irradiation range of the radiation emitted from the opening 17 of the main body 11 can be varied. The band door 16 is attached to and detached from the band door frame 20 as necessary.

  Next, the operation of this embodiment will be described.

  In the luminaire 1, the light from the light source 6 accommodated in the fixture body 2 is emitted from the projection opening 5, and the color filter 12 that crosses the input side filter holder 14 of the color changer 4 and the opening 17 of the main body 11 and the output side. The light passes through the filter holder 15 and is emitted. Then, by selecting the unit color filters 12a, 12b, 12c,... Of a predetermined color in the color filter 12, light of a desired light color selected from the opening 17 of the color changer 4 is emitted. At this time, the input-side filter holder 14 and the output-side filter holder 15 respectively store colorless filters 14a and 14b that do not convert the light color.

  When there is no unit color filter 12a, 12b, 12c,... That converts light of a desired light color in the color filter 12, the unit color filters 12a, 12b, 12c,. 14 and the output side filter holder 15 are replaced with ones that convert light of a desired light color. Thereby, the light of the desired light color selected from the opening 17 of the color changer 4 is emitted.

  The irradiation range of the light emitted from the opening 17 of the color changer 4 is varied by expanding and adjusting the wings 27 a and 27 b of the bander 16.

  The input side filter holder 14 and the output side filter holder 15 substantially close the opening 17 of the main body 11 of the color changer 4 from the back surface 11b side and the front surface 11a side of the main body 11, respectively. This makes it difficult for dust and dirt to enter the main body 11.

  According to the lighting apparatus 1 and the color changer 4 of the present embodiment, the incident side filter holder 14 and the emission side filter holder 15 are mounted on the incident side and the emission side of the opening 17 of the main body 11 of the color changer 4, respectively. It becomes difficult for dust and dirt to enter from the outside through the opening 17 in the main body 11, and it is possible to make it difficult for dust and dirt to adhere to the color filter 12 and the photosensors 13 and 13. Therefore, it is possible to suppress a decrease in the transmittance of the color filter 12 and color misregistration due to adhesion of dust, dust, and the like, and to suppress problems such as non-detection of the photosensors 13 and 13.

  When there is no unit color filter 12a, 12b, 12c,... That converts light of a desired light color in the color filter 12, the color changer can be obtained by replacing the input side filter holder 14 and the output side filter holder 15. Since the light of a desired light color can be emitted from the four openings 17, the versatility of the selected light color is improved.

  DESCRIPTION OF SYMBOLS 1 ... Lighting fixture, 2 ... Appliance main body, 4 ... Color changer, 5 ... Projection opening, 6 ... Light source, 11 ... Main body, 12 ... Color filter, 12a, 12b, 12c ... Unit color filter, 13 ... As an operation control means 14 ... Incident side filter holder, 15 ... Outgoing side filter holder, 16 ... Bander, 17 ... Opening, 18 ... Incident side filter holder frame, 19 ... Outgoing side filter holder frame, 20 ... Banda frame

Claims (2)

An opening through which light from a light source passes, an incident side filter holder frame provided on the light incident side of the opening, an emission side filter holder frame and a band door frame provided on the light emission side of the opening, respectively. With the body;
A color filter housed in the main body and configured so that the unit color filters of a plurality of colors are continuously formed in a band shape, and the unit color filter is movable so as to cross the opening;
An operation control means for the color filter disposed in the main body;
An incident side filter holder and an outgoing side filter holder respectively attached to the incident side filter holder frame and the outgoing side filter holder frame of the main body;
A band door detachable from the band door frame;
A color changer characterized by comprising: An instrument body in which a light projection opening is provided on one end side, and a light source is housed so that emitted light is emitted from the light projection opening;
The color changer according to claim 1, wherein the color changer is attached to one end side of the instrument body so as to face the light projecting opening, and a bander is attached to the bander frame.
The lighting fixture characterized by comprising.

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