JPH04245193A - Electromotive device of electric apparatus - Google Patents

Abstract

PURPOSE:To see that the down driving by an electromotive shifter is not performed during the lighting of the lamp of an illuminator. CONSTITUTION:An illuminator 1 is provided freely in ascent and descent by a hanging line 5. The illuminator body 1 ascends and descends with the ascent and descent of the hanging line 5 by an electromotive shifter 6. The fixed contact point 3 provided at the ascent position of the illuminator 1 and the movable contact part 4 provided at the illuminator 1 are brought into contact with and separate from each other by the ascent and the descent of the illuminator 1. A relay detects the current application to the illuminator 1, and opens the driving circuit of an electromotive shifter 6. The electromotive shifter 6 is not driven by the relay during the lighting of the lamp of the illuminator 1. Arc discharge does not occur between the fixed contact part 3 and the movable contact part 4. Burning never occurs between the fixed contact part 3 and the movable contact part 4.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorized device for electrical equipment such as lighting equipment and audio equipment having speakers, which are installed movably up and down on high ceilings such as factories and gymnasiums.

0003

[Prior Art] Conventionally, electrical equipment such as lighting equipment that is installed on high ceilings such as factories and gymnasiums so that it can be raised and lowered has to be maintained and
In order to facilitate inspection, it is attached to the fixed part on the ceiling side so that it can be raised and lowered by a hanging strip that is raised and lowered by a lifting device. For example, as shown in FIGS. 1 and 2, a pair of movable contact parts 4 that are brought into contact with and separated from a pair of fixed contact parts 3 provided on a fixed part 2 on the ceiling side are provided on an electrical equipment main body 1 that is raised and lowered, and Power is supplied to the electrical equipment body 1 through the connection between the contact portion 3 and the movable contact portion 4. The hanging strip 5 connected to the device main body 1 is wound up or unwound by a winding drum 8 which is rotated in forward and reverse directions by the drive of an electric motor 7 of an electric lifting device 6, and is raised and lowered. This electric motor 7 is shown in Figure 6.
It is selectively driven in forward and reverse directions by operating a switch device 10 provided on a distribution board 9 shown in FIG. In addition, the load of the electrical equipment main body 1 , for example, a plurality of lamps of a lighting fixture, blinks by opening/closing operations of a switch device 11 provided in the distribution board 9 and switches 12 connected to the main switch device 11 respectively. It is now possible to do so.

0004

Problems to be Solved by the Invention The conventional elevating device for electric equipment shown in FIG. The device 11 and the switch 12 are configured independently of each other, and the electric lifting device 6 and the electrical equipment main body 8 are driven and controlled by operating the respective switch devices 10 and 11. Therefore, for example, when the lighting equipment is lowered while the lamp serving as the load of the lighting equipment in the electrical equipment main body 8 is lit, the fixed contact portion 3 and the movable contact portion 4 are brought into contact and separated at the lifting speed of the lighting equipment. , an arc discharge occurs between the fixed contact part 3 and the movable contact part 4, and the contact resistance between the fixed contact part 3 and the movable contact part 4 increases due to this arc discharge.
This causes flickering or non-lighting, and burnout of the fixed contact section 3 and the movable contact section 4. In particular, there is a problem in that the fixed contact section 3 located at a high place cannot be easily inspected or replaced.

The present invention has been made in view of the above-mentioned problems, and when the load of the electrical equipment main body is driven, the electric moving device does not perform movable drive, and the fixed contact portion and the electrical equipment main body are provided with The present invention provides a motorized device for electrical equipment that eliminates the risk of burnout of the contact portion due to arc discharge generated between the movable contact portion and the movable contact portion, and has improved safety.

[Configuration of the invention]

[0007]

[Means for Solving the Problems] A motorized device for an electrical device of the present invention includes an electrical device main body movably provided by a connecting strip, and an electric moving device that moves the electrical device main body by moving the connecting strip. , a fixed contact section provided at a predetermined position on the electrical equipment main body and connected to a power source; and a fixed contact section provided on the electrical equipment main body and contacted with the fixed contact section at a predetermined position on the electrical equipment main body, and when movable. a movable contact portion that is separated from the electric moving device, and a drive circuit for the electric moving device, which detects energization to the electric device body, opens the drive circuit of the electric moving device, and prevents driving of the electric moving device. It is equipped with a blocking means.

[0008]

[Operation] In the electric device for electric equipment of the present invention, when the connecting strip is moved by the electric moving device, the main body of the electric equipment is raised and lowered. When the electric device is driven, the electric moving device is not driven by the cutoff means, and the movable contact portion and the fixed contact portion are not disconnected while electricity is flowing between them. Arc discharge does not occur between the fixed contact portion and the movable contact portion, and burnout due to arc discharge does not occur in the fixed contact portion and the movable contact portion.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of a motorized device for electrical equipment according to the present invention will be explained with reference to FIGS. 1 to 3.

In FIGS. 1 and 2, a fixed part 2 installed and fixed at a high place on the ceiling side has an electric motor 7, and this electric motor 7
An electric moving device 6 is provided which includes a winding drum 8 that is rotated by a winding drum 8 and a hanging strip 5 that serves as a connecting strip for a wire or the like that is wound or unwound around the winding drum 8.

1 is an electrical equipment main body, for example, a lighting fixture;
The hanging strip 5 is connected to the lighting fixture 1, and the lighting fixture 1 is moved, that is, raised and lowered, by the electric moving device 6.

[0012] Furthermore, a pair of fixed contact portions 3, 3 are attached to the lower part of the fixed portion 2, facing downward. The lighting fixture 1 is provided with a pair of movable contact parts 4, 4 that are brought into contact with and separated from the fixed contact parts 3, 3.

Next, as shown in FIG. 3, the distribution board 9 has the following:
A switch device 10 for controlling the electric motor 7 of the electric moving device 6 and a switch device 11 for blinking a plurality of lamps of the lighting fixture 1 are provided. It is connected to the drive circuit 15 between the two. Further, a switch device 11 for lighting the lamps is connected between an AC power source and each switch 12 connected between each of the lamps. Further, each switch 12 is also arranged on the distribution board 9.

Furthermore, the distribution board 9 is provided with a cutoff means 16 for detecting the energization of the lighting fixture 1 and opening the drive circuit 15 of the electric moving device 6 to prevent the electric moving device 6 from being driven. . This cutoff means 16 is composed of a relay 17, a relay coil is connected to the load side of the switch device 11, and the drive circuit 15 is provided with an opening/closing contact 18 that is opened by excitation of the relay coil.

Next, the operation of this embodiment will be explained.

The winding drum 8 is rotated by the drive of the electric motor 7 of the electric moving device 6, and the hanging strip 5 is movable, that is, it is wound around the winding drum 8 or rewound, and the lighting fixture 1 is raised and lowered. Ru. When the lighting fixture 1 is raised, first, as shown in FIG.
The movable contact parts 4, 4 of the lighting fixture 1 come into contact with each other, and the lighting fixture 1
A switch device and a switch 12 are attached to the lamp which serves as a load.
The power supply is connected when the is closed.

Furthermore, when the lighting fixture 1 is lowered, the movable contact parts 4, 4 are separated from the fixed contact parts 3, 3, as shown in FIG.

While the lighting fixture 1 is turned on by closing the switch device 11 and the switch 12, the relay coil of the relay 17 serving as the interrupting means 16 is energized, and the opening/closing contact 18 of the drive circuit 15 is opened. Even if the switch device 10 that drives the electric moving device 6 is closed, the electric motor 7 is not driven, the lighting fixture 1 is not lowered, and the movable contact portions 4, 4 are separated from the fixed contact portions 3, 3. Therefore, the fixed contact portions 3, 3 and the movable contact portions 4, 4 will not be burnt out due to arc discharge.

Next, the configuration of another embodiment will be explained with reference to FIG.

[0020] A plurality of electric moving devices 6 are controlled to raise and lower, respectively, and switches 13 connected to the electric motors 7 of each electric moving device 6 are connected to a switch device 10 on the distribution board 9, and each lighting A relay 17 of the cut-off means 16 is connected to each switch 12 connected to the lamp of the appliance 1.
A relay coil is connected, and a switching contact 19 that is opened by excitation of the relay coil is connected between the switch device 10 and each switch 13.

In this embodiment, in the lighting fixture 1 with the lamp lit, the relay coil of the relay 17 is energized and the switching contact 19 is open, so that the lighting fixture 1 with the lamp lit is The electric motor 7 of the electric moving device 6 that is lowered is not driven.

The configuration of yet another embodiment will be explained with reference to FIG.

In this embodiment, a switch with an auxiliary contact having a cutoff means 16 is used as the switch 12 for lighting the lamp of each lighting device 1. A relay coil 20 is connected to each switch 12, and the relay coil 20 is connected to the switch 12. The opening/closing contact 18 that is opened by excitation is connected to each electric moving device 6.
are connected to the electric motors 7, respectively.

In the configuration of this embodiment as well, in the lighting fixture 1 with the lamp lit, the relay coil 20 is energized and the switching contact 19 is open. The electric motor 7 of the electric moving device 6 that is lowered is not driven.

[0025] In the above embodiment, a lighting fixture was described as an electrical equipment body that is moved up and down, but the present invention is not limited to lighting equipment, but can be applied to various electrical equipment such as audio equipment installed on the side of a high ceiling.

[0026] In the above-mentioned embodiment, an explanation was given of a device in which the main body of the electrical equipment is raised and lowered, but the structure is not limited to this.
It is also possible to make the connecting strips movable in the horizontal direction by forming them endlessly.

[0027]

According to the present invention, when the connecting strip is moved by the electric moving device, the electric equipment main body is moved, and when the electric equipment main body is driven, the electric moving device is not driven by the interrupting means. Since the movable contact part and the fixed contact part are not disconnected while the current is flowing between them, arc discharge does not occur between the fixed contact part and the movable contact part, and the fixed contact part and the movable contact part are not disconnected. There is no risk of burnout due to arc discharge at the contact point, improving safety.

[Brief explanation of the drawing]

FIG. 1 is an explanatory front view of a motorized device for electrical equipment showing one embodiment of the present invention.

FIG. 2 is an explanatory front view showing the electrical device in a lowered state.

FIG. 3 is an electrical circuit diagram of the same as above.

FIG. 4 is an electric circuit diagram of an electric device of an electric device showing another embodiment of the present invention.

FIG. 5 is an electric circuit diagram of an electric device of an electric device showing another embodiment of the present invention.

FIG. 6 is a circuit diagram of a conventional elevating device for electric equipment.

[Explanation of symbols]

1　　　Electrical equipment body 2 Fixed part 3 Fixed contact part 4 Movable contact part 5. Connecting article 6　　　　Electric movement device 16　　　　　Shutoff means

Claims (1)

[Claims] 1. An electrical device main body movably provided by a connecting strip, an electric moving device that moves the electrical device main body by moving the connecting strip, and an electric moving device provided at a predetermined position of the electrical device main body and connected to a power source. a fixed contact portion provided on the electrical equipment main body, a movable contact portion that contacts the fixed contact portion at a predetermined position of the electrical equipment main body and is separated from the fixed contact portion when movable; and the electric moving device. A drive circuit for an electric device, characterized in that the electric device is equipped with a cutoff means for detecting energization to the main body of the electric device, opening the drive circuit of the electric moving device, and preventing the driving of the electric moving device. Device.