JP2006076733A - Cage illuminating device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cage illuminating device of an elevator illuminating the inside of a cage stably by making a cold cathode tube emit light by predetermined illuminance immediately after lighting it even when ambient temperature of the cold cathode tube as a light source is low in a cold district and in the winter. <P>SOLUTION: The cold cathode tube 12 as the light source for illuminating the inside of the cage is provided in a ceiling part of the cage 1 of the elevator. A heater 15 is provided for the cold cathode tube 12 to keep temperature at such temperature that the cold cathode tube 12 emits light by stable illuminance immediately after lighting it by this heater 15. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cab illuminating device for illuminating an elevator cab.

  A lighting box is attached to the ceiling of the elevator cab. This lighting box has a large opening on the lower surface, and a light-transmitting lighting plate made of, for example, synthetic resin is provided in this opening. A light source is provided in the illumination box, and light from the light source is diffused into the car room through the illumination plate to illuminate the car room.

  A fluorescent lamp (hot cathode tube) is used as a light source provided on the ceiling of the cab. However, the fluorescent lamp (hot cathode tube) has a drawback that its aperture is relatively large and its life is relatively short.

  Therefore, the present applicant has proposed that a cold cathode tube (cold cathode fluorescent lamp) is used as a light source provided on the ceiling of the cab. The cold cathode tube has an elongated cylindrical translucent discharge vessel having a diameter of about 1 to 6 mm, a pair of cold cathodes sealed at both ends of the discharge vessel, and fluorescence applied to the inner surface of the discharge vessel. Body and a discharge medium sealed in a discharge vessel, and the cathode emits light without being heated. Therefore, the life is hardly affected by the number of times of turning on and off, and the life is long. When applied, it has an advantageous characteristic that it is turned on immediately and there is no time delay until light emission.

  When such a cold cathode tube is used as a light source, the cold cathode tube is turned on via a power supply circuit and an inverter. That is, an AC power supply 100V is supplied to the power supply circuit, and this AC power supply is transformed to a predetermined DC voltage 24V, for example, using AVR or the like and supplied to the inverter. The inverter converts the DC voltage applied from the power supply circuit into an AC voltage having a predetermined frequency, applies the converted AC voltage to the cold cathode tube, and turns on the cold cathode tube.

  However, the cold cathode tube has a characteristic that the brightness at the time of lighting changes under the influence of the ambient temperature. For example, the illuminance at the time of lighting decreases when the ambient temperature cools down in a cold district or the like.

  In particular, when the ambient temperature is 5 ° C. or lower, the relative illuminance immediately after lighting is 10%. In cold districts of −10 ° C. or lower, the cold cathode tube may not light normally even when the inverter is started. Further, not only in cold regions, the illuminance immediately after the cold cathode tube is turned on may not be properly lit even in an environment where the ambient temperature drops to 5 ° C. or lower in winter.

  In general, an elevator turns off the lighting device in the car room when the passenger does not use it for a certain time from the viewpoint of energy saving, and turns on the lighting device in the car room when the passenger operates a button for using the elevator. System is adopted.

  Even in such a case, if the ambient temperature of the cold cathode fluorescent lamp is low in a cold region or in winter, the way of flying electrons in the cold cathode fluorescent lamp is not stable immediately after the start of lighting. The phenomenon of gradually becoming brighter with the passage of time occurs, and when a passenger gets in the car, the car room may feel dark.

  After the start of lighting, the surface temperature rises due to the emission heat of the cold cathode tube itself, the electron flight gradually stabilizes and the brightness stabilizes, but it takes about 1 minute to stabilize to the predetermined illuminance. It takes time and passengers get off within that time, which is problematic in terms of serviceability.

  The present invention has been made paying attention to such points, and the object of the present invention is to provide the cold cathode even when the ambient temperature of the cold cathode tube is lowered in a cold district or winter. It is an object of the present invention to provide an elevator cab illumination device capable of stably illuminating a car room by emitting light brightly at a predetermined illuminance immediately after the tube is turned on.

  According to the first aspect of the present invention, an elevator cab, a cold cathode tube provided as a light source for illuminating a cab in the ceiling of the cab, and the cold cathode tube can be heated and kept warm. And a heat retaining means.

  According to a second aspect of the present invention, the heat retaining means includes a heater disposed so as to face the cold cathode tube, and the heater cools the cold cathode tube to a temperature at which the cold cathode tube can emit light with a stable illuminance immediately after lighting. It is characterized by keeping the cathode tube warm.

  The invention according to claim 3 is characterized in that a switch mechanism capable of manually opening and closing the energization circuit is provided in the energization circuit of the heater.

  According to a fourth aspect of the present invention, an energizing circuit of the heater is provided with an automatic temperature controller capable of automatically opening and closing the energizing circuit according to the ambient temperature of the cold cathode tube. It is a feature.

  According to a fifth aspect of the invention, in the automatic temperature controller, when the ambient temperature of the cold-cathode tube is less than a temperature at which the cold-cathode tube can emit light with a stable illuminance immediately after lighting, the heater energization circuit And the heater energization circuit is opened when the temperature of the cold cathode tube is equal to or higher than a temperature at which light can be emitted with stable illuminance immediately after lighting.

  According to the present invention, even when the ambient temperature of the cold cathode fluorescent lamp becomes low in a cold district or in winter, the cold cathode fluorescent lamp emits light with a predetermined illuminance immediately after lighting, thereby stabilizing the interior of the car. And can be illuminated.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 schematically shows a configuration of a ceiling portion of an elevator cab 1. An illuminating box 2 is attached to the ceiling of the cab 1, and the illuminating box 2 has a large opening 3 on the lower surface, and an illuminating plate 4 made of light-transmitting synthetic resin, for example, is formed in the opening 3. Is provided.

  A plurality of light source units 8 are mounted in parallel on the ceiling surface of the lighting box 2. 2 is a plan view of the arrangement of the light source units 8 in the illumination box 2, FIG. 3 is a sectional view of the light source unit 8, and FIG. 4 is a perspective view of the light source unit 8 in an exploded state. .

  Each light source unit 8 provided in the illumination box 2 includes a base plate 10 that also serves as a reflector, and a pair of cold cathode tubes 12 as light sources that are respectively mounted on the surface of the base plate 10 via sockets 11. And a cover 13 attached to the base plate 10 so as to cover the cold cathode tubes 12, and the pair of cold cathode tubes 12 are supported so as to be arranged in parallel with each other. Made of synthetic resin.

  An electrothermal heater 15 is provided as a heat retaining means between the base plate 10 and each cold cathode tube 12. Each heater 15 is attached to the surface of the base plate 10 so as to face each cold cathode tube 12 while being spaced apart. An inverter 16 for lighting the cold cathode tube 12 is attached to the base plate 10.

  As shown in FIGS. 1 and 2, a power circuit unit 20 is provided in the upper part of the car room 1. Then, an AC power supply 100V is supplied to the power supply circuit unit 20, and the AC power supply is transformed to a predetermined DC voltage 24V, for example, using AVR or the like and supplied to the inverter 16, respectively. Each inverter 16 converts the DC voltage applied from the power supply circuit unit 20 into an AC voltage having a predetermined frequency, applies the converted AC voltage to the cold cathode tube 12, and the cold cathode tube 12 is applied by the application of the AC voltage. Lights up.

  Regardless of whether the cold cathode tubes 12 are turned on or off, the heaters 15 provided in each light source unit 8 are always energized through an energization circuit (not shown). Immediately after that, the temperature is maintained at a temperature at which stable light emission is possible, for example, 25 ° C.

  Therefore, when the cold cathode tube 12 is turned on via the inverter 16 in a cold district or in winter, the way of flying electrons is stabilized immediately after the start of lighting of the cold cathode tube 12, and emits light with a predetermined illuminance. The interior of the cab 1 is illuminated with a stable predetermined brightness.

  Further, when a passenger operates a button for using the elevator from a state where each cold cathode tube 12 is turned off without using the elevator for a certain period of time, and the power is turned on to each cold cathode tube 12 by this operation. In addition, the cold cathode tube 12 emits light with a predetermined illuminance immediately after the start of lighting of the cold cathode tube 12, and the interior of the car room 1 is illuminated with a stable predetermined brightness, so that when a passenger gets into the car room 1 There is no inconvenience that the interior of the car room 1 is dark and then gradually becomes brighter, and the serviceability for passengers is improved.

  Furthermore, in this embodiment, since each cold cathode tube 12 is always kept at room temperature (25 ° C.) via the heater 15, the life of the cold cathode tube 12 can be further extended.

  5 and 6 show the second embodiment. In this embodiment, as shown in FIG. 5, the current is supplied to the heater 15 provided in each light source unit 8 in an energization circuit. An opening / closing switch mechanism 25 is provided. As shown in FIG. 6, the switch mechanism 25 is attached to the substrate of the inverter 16 in one light source unit 8 and can be manually operated from the outside of the light source unit 8.

  In the case of this embodiment, when the ambient temperature of the cold-cathode tube 12 is, for example, 25 ° C. or more in summer, etc., the switch mechanism 25 is manually opened to cut off the power to each heater 15. To do.

  Thereby, useless electricity supply to the heater 15 can be prevented and consumption of useless power can be suppressed. Since the surface temperature of the cold cathode tube 12 can be maintained at a stable illuminance temperature at the ambient temperature without energizing the heater 15, the cold cathode tube 12 emits light to a predetermined illuminance immediately after the start of lighting. The room can be kept at a stable brightness.

  7 and 8 show a third embodiment. In this embodiment, as shown in FIG. 7, an automatic temperature controller 28 for opening and closing the energizing circuit of the heater 15 is provided. The automatic temperature controller 28 senses the ambient temperature of the cold cathode tube 12, and when the ambient temperature is lower than 25 ° C., for example, the energization circuit of each heater 15 is closed, and when the ambient temperature is 25 ° C. or higher, each heater 15 The energization circuit is opened. As shown in FIG. 8, the automatic temperature controller 28 is attached to the substrate of the inverter 16 in one light source unit 8, for example.

  In this embodiment, when the ambient temperature of the cold cathode tube 12 is lower than the stable illuminance temperature, each heater 15 is energized through the automatic temperature controller 28, and by this energization, each cold cathode tube 12 is heated to be equal to or higher than the stable illuminance temperature. Therefore, the cold-cathode tube 12 can emit light at a predetermined illuminance immediately after the start of lighting, thereby maintaining a stable brightness in the car room.

  When the ambient temperature of the cold cathode tube 12 is equal to or higher than the stable illuminance temperature, the temperature is detected by the automatic temperature controller 28, and the energization circuit of the heater 15 is automatically opened, thereby preventing unnecessary energization of the heater 15. Thus, unnecessary power consumption is suppressed.

  By the way, it is also possible to use LED (light emitting diode) and organic EL (electroluminescence) as a light source which illuminates the elevator cab. In this case, for example, a plurality of white LEDs and organic EL elements are assembled into a suitably shaped holder or the like to form a unit such as a rod, ring or two-dimensional plane, and the unit is an illumination box on the ceiling of the cab Include in. In addition, it is also possible to configure a rod shape, a ring shape, a two-dimensional plane shape, or the like using one LED or an organic EL element.

  The lighting box may be a case where only an LED is incorporated as a light source, a case where only an organic EL is incorporated, or a case where an appropriate number of LEDs and organic EL are combined.

  In addition to white LED and organic EL, other colors can be used according to the surrounding environment, light intensity, usage time zone, season of use, etc. It is also possible to mix EL. Furthermore, a cold cathode fluorescent lamp can be incorporated in an illumination box in combination with an LED or an organic EL as a light source to constitute a cab illumination device.

  Needless to say, as a means for causing the LED or the organic EL to emit light, a conventionally used drive control device is used.

The block diagram of the cab illuminating device which concerns on 1st Embodiment of this invention. The top view which looked at the cage room lighting device from the bottom. Sectional drawing of the light source unit in the cab illuminating device. The perspective view of the decomposition | disassembly state of the light source unit. The energization circuit diagram of the heater in the cage | basket | chamber illumination device which concerns on 2nd Embodiment of this invention. The perspective view of the decomposition | disassembly state of the light source unit in the cab illumination device. The energization circuit diagram of the heater in the cab illuminating device according to the third embodiment of the present invention. The perspective view of the decomposition | disassembly state of the light source unit in the cab illumination device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Car room 2 ... Illuminating box 3 ... Opening part 4 ... Illuminating plate 8 ... Light source unit 10 ... Base plate 11 ... Socket 12 ... Cold cathode tube 13 ... Cover 15 ... Heater 16 ... Inverter 20 ... Power supply circuit unit 25 ... Switch mechanism 28 ... Automatic temperature controller

Claims (5)

An elevator cab,
A cold-cathode tube provided as a light source for car interior lighting on the ceiling of the car room;
Thermal insulation means capable of heating and maintaining the cold cathode tube;
An elevator cab lighting device comprising:   The heat retaining means includes a heater disposed to face the cold cathode tube, and the heater keeps the cold cathode tube at a temperature at which the cold cathode tube can emit light with stable illuminance immediately after lighting. The elevator cab lighting device according to claim 1, wherein   The elevator cab illumination device according to claim 2, wherein a switch mechanism capable of manually opening and closing the energization circuit is provided in the energization circuit of the heater.   3. An automatic temperature controller capable of automatically opening and closing the energization circuit according to the ambient temperature of the cold cathode tube is provided in the energization circuit of the heater. The elevator cab lighting device described.   The automatic temperature controller closes the energization circuit of the heater when the ambient temperature of the cold cathode tube is less than a temperature at which the cold cathode tube can emit light at a stable illuminance immediately after lighting. 5. The elevator cab lighting device according to claim 4, wherein the heater energization circuit is opened when the temperature of the cathode tube is equal to or higher than a temperature at which light can be emitted with stable illuminance immediately after lighting.

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