JPH0452886Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an elevating type lighting fixture, and relates to protection of switching contacts of a lighting circuit.

[Conventional technology]

Conventionally, as shown in FIG. 4, in an elevating type lighting fixture, an elevating circuit including a switch 2 for switching the elevating/lowering stop of a motor 1 of an elevating device, and a lighting circuit including a blinking switch 4 for blinking a lamp 3, are provided. It was set up separately.

However, in general, lamp 3 is used for elevating type lighting equipment.
is installed on a light fixture attached to the lifting section and is connected to the lighting circuit inside the lifting device via a switching contact 5 provided inside the lifting device, but unlike in the past, the lifting circuit and the lighting circuit are connected to each other. If they are installed separately, if the lifting section is lowered with the flashing switch 4 closed and the lamp 3 on, the opening/closing contact 5 will open and an arc will occur at the contact, damaging the contact or accumulating carbon, which will shorten the service life. On the other hand, if the lifting part is raised with the flashing switch 4 closed, a large inrush current will flow through the switching contact 5 when the contact closes, especially under incandescent loads, and the contact material must be made of expensive material that can withstand these conditions. It was necessary to use suitable materials.

[Problem that the invention attempts to solve]

Therefore, the present invention aims to prevent damage to the opening/closing contacts when the flashing switch of the lighting circuit is raised and lowered in the closed state in electric lifting type lighting equipment, and to reduce the cost of contact materials. .

[Means for solving problems]

The lifting type lighting device according to the present invention has a lifting switch and a lowering switch that are interposed between the power supply and the lifting circuit and the lowering circuit of the motor that lifts and lowers the lifting part to which the lamp equipped with the lamp is attached. Each consists of a three-way switch, one of the load side terminals of the up switch is connected to the up circuit of the motor, one of the load side terminals of the down switch is connected to the down circuit of the motor, and one of the two switches Connect the common terminal of the switch to the power supply, connect the common terminal of the other switch to the load side terminal of the one switch that is not connected to the motor, and connect the common terminal of the other switch to the load side terminal of the switch that is not connected to the motor of the other switch. The load side terminal of the lamp is connected to the power terminal of the lamp blinking switch, and the load side terminal of the blinking switch is connected to the lamp via the opening/closing contact, so when the power is turned on to the lifting device, the lighting equipment does not The power is not turned on.

〔Example〕

1 to 3 show embodiments of the present invention, which will be explained below based on the drawings. The lifting device main body 6 is fixed to the building structure with bolts, and has a winding drum (not shown) and a motor 1 therein for winding the wire from which the lifting section 7 with the lifting section attached at the bottom is suspended. . The opening/closing contact 5 that connects the power supply circuit to the lamp 3 between the lifting device main body 6 and the lifting section 7 is a fixed contact 8 that protrudes and is fixed in a substantially hemispherical shape to prevent dust from accumulating on the top surface of the lifting section 7. ,
It consists of a movable contact 10 formed on the lower surface of the lifting device main body 6 by a spring 9 so as to be movable inward of the lifting device main body 6, and when the lifting device 7 descends, the contact opens and the lamp 3 does not light up. It's becoming like that.

The lifting operation and lighting blinking operation circuit is configured as shown in Fig. 1, and the lifting switch 11 of the motor 1 uses a 3-way switch, whose common terminal is connected to the power supply, and the 2 load side One of the terminals is connected to the rising circuit of motor 1. Similarly, a 3-way switch is used for the lowering switch of motor 1, and its common terminal is connected to the load side terminal of the raising switch 11 on the side not connected to motor 1, and the two load side terminals are connected to the lowering switch 11. One side is connected to the lowering circuit of motor 1. The blinking switch 4 of the lamp 3 uses a one-way switch, and the power supply side terminal is connected to the load side terminal of the lowering switch 12 that is not connected to the motor 1. Connected to lamp 3.

To raise the lifting section, press the lifting switch 11.
All you have to do is turn it ON and connect the ascending circuit of the motor 1 to the power supply. In this state, the descending switch 12 and flashing switch 4 are disconnected from the power supply, and the lamp 3 will not light up, preventing damage to the switching contact 5. There is no fear. In addition, when lowering the lifting section, turn off the lift switch 11, disconnect the motor 1 from the power supply, and then turn on the lower switch 12.
The descending circuit of the motor is connected to the power supply via the motor 1, but in this case, the flashing switch 4 of the lamp 3 is disconnected from the power supply as in the case of ascending, so there is no risk of damage to the opening/closing contact 5. In order to turn on the lamp 3, it is necessary to turn off both the rising switch 11 and the descending switch with the opening/closing contact 5 closed when the lamp 3 has risen, and then turn on the blinking switch 4. When either the ascending switch 11 or the descending switch 12 is turned on, the lamp 3 is always turned off, and there is no possibility that the opening/closing contact 5 will be damaged by arcing or the like.

[Effect of idea]

As described above, in the lifting type lighting equipment according to the present invention, when the raising switch or lowering switch is operated to enter the lifting/lowering operation state, the lamp flashing switch is always disconnected from the power supply, the lamp is turned off, and then the lifting switch is turned off. The switching contacts are opened and closed by raising and lowering the switch, and there is no fear that the switching contacts will be damaged by arcing or the like, and there is no need to use expensive materials for the switching contacts.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a circuit diagram, FIG. 2 is a side view of the lifting device, and FIG. 3 is a sectional view of the contact portion. FIG. 4 is a circuit diagram showing a conventional example of the present invention. 1...Motor, 2...Elevation stop switch, 3...Lamp, 4...Flashing switch, 5...
Opening/closing contact, 6... Lifting device main body, 7... Lifting part,
8... Fixed contact, 9... Spring, 10... Movable contact, 11... Up switch, 12... Down switch.

Claims (1)

[Scope of utility model registration request] A rising switch and a descending switch that are interposed between the power source and the rising circuit and descending circuit of the motor that raises and lowers the lifting section to which the lamp equipped with the lamp is attached are respectively configured as 3-way switches. Connect one of the load side terminals of the switch to the motor's up circuit, one of the load side terminals of the down switch to the motor's down circuit, and connect the common terminal of one of the two switches to the power supply. Then, connect the common terminal of the other switch to the load side terminal of the one switch that is not connected to the motor, and connect the load side terminal of the other switch that is not connected to the motor to the flashing lamp switch. A lighting device characterized in that the flashing switch is connected to a power supply terminal, and the load side terminal of the blinking switch is connected to a lamp via an opening/closing contact.