JPH07211126A - Elevation type luminaire - Google Patents

Abstract

PURPOSE:To prevent damage to a luminaire, etc., by providing a detection means to detect when an object is caught between the luminaire and an elevation device during aseconding motion of the luminaire. CONSTITUTION:In an elevation device 1 having a drum 5 to wind two wires 4, a motor 6 to rotate the drum 5, a pair of pulleys 7, 7' to change the direction of the wires 4, and a cord reel 9 to wind a cord 8, the wire 4 is set to suspend a luminaire 2 having a pair of lighting fixtures 10. When an object is caught between the luminaire 2 and the elevation device 1, or in the case where the luminaire 2 is applied to an object during its down motion, an overcurrent at the motor 6 is received by a control means 3 as a detection signal by a detection means, the rotation direction of the motor 6 is inverted, the motor 6 is driven for a specified time and then stopped, and the luminaire 2 is lighted off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator lighting fixture.

[0002]

2. Description of the Related Art Conventionally, a lighting device is hung on a lifting device,
There is a lifting type lighting device that moves the lighting device up or down in a state where it can be turned on or off by the operation of the lifting device.

[0003]

However, when the lighting fixture is lifted and an object including an arm is sandwiched between the lighting fixture and the lifting device, there is a risk of damaging the object or the lighting fixture. Further, when the lighting fixture descends and hits an object, there is a risk that the object or the lighting fixture is damaged or the wire of the lifting device is loosened and the lifting device is broken.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a lifting type lighting fixture which can prevent damage to the lighting fixture or the like even if the lighting fixture sandwiches or hits an object.

[0005]

An elevational lighting fixture according to claim 1 is a lifting device, a lighting fixture which is suspended by the lifting device and moves up and down, and the lighting fixture and the lifting device while the lighting fixture is being raised. The lighting device is controlled to a safe state by having a detection means for detecting either one of a case where an object is sandwiched between the device and the device and a case where the lighting device hits an object while the lighting device is descending. And a control means.

According to a second aspect of the present invention, in the elevating type luminaire according to the first aspect, the control means stops the luminaire by the operation of the detecting means, and slightly elevates and lowers in a direction opposite to that before stop. . According to a third aspect of the present invention, in the elevator lighting fixture according to the first or second aspect, the control unit stops the lighting fixture and turns off the light by the operation of the detection unit.

[0007]

According to the raising / lowering luminaire of the first aspect, the luminaire is elevated / lowered by the operation of the elevating / lowering device. However, an object is sandwiched between the luminaire and the elevating / lowering device while the luminaire is rising, and the luminaire is If an object is hit during the descent, the detection means operates, so that the control means can be operated to control the lighting fixture in a safe state.

According to the raising / lowering luminaire of claim 2, in claim 1, the control means stops the luminaire by the operation of the detecting means and raises / lowers a little in a direction opposite to that before stop. In addition to the action of claim 1, it is possible to recognize that an object including a hand or an arm is caught in the raising operation of the lighting fixture, and the object and the lighting fixture are less adversely affected and can be prevented from being damaged. Easy to remove In addition, since the lighting equipment does not drop slightly and stop and continue to fall, it is possible to avoid an unexpected situation without accidentally hitting an object under the lighting equipment. Further, in the descending operation of the lighting fixture, since it slightly rises after hitting an object, it is possible to prevent a failure of the elevating device, for example, a wire sticking out from the drum or a entanglement.

According to a third aspect of the present invention, in the first or second aspect, the control means stops and turns off the lighting equipment by the operation of the detection means. Also, in addition to the function of claim 2, even if the lighting equipment continues to be in contact with the object, it does not heat the object due to the lamp heat of the lighting equipment, so it does not lead to a hazard such as smoking or ignition and prevents danger. can do.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. That is, this lifting type lighting fixture includes the lifting device 1, the lighting fixture 2, and the control means 3. The lifting device 1 includes a drum 5 for winding the two wires 4.
A motor 6 for rotating the drum 5, a pair of pulleys 7, 7'for changing the direction of the wire 4, and a cord reel 9 for winding the cord 8. The rotation of the motor 6 in one direction causes the drum 5 to be wound up, and the rotation in the other direction causes a rewinding operation. The luminaire 2 is raised by the winding operation, and the luminaire 2 is lowered by the rewinding operation. The tip of the cord 8 is connected to the lighting fixture 2, and the cord reel 9 side is connected to the power source E (FIG. 4).

The lighting fixture 2 is suspended by the wire 4 of the elevating device 1 and ascends and descends. The lighting fixture 2 of the embodiment is a pair of lamps 1.
Has 0. In addition, since the cord 8 is connected to the lighting fixture 2, power can be supplied through the cord 8 when the lighting fixture 2 is rising, descending, or stopped.
It can be turned on and off. The control unit 3 has a detection unit that detects when an object 11 is sandwiched between the lighting fixture 2 and the lifting device 1 while the lighting fixture 2 is rising, and controls the lighting fixture 2 to a safe state.

The detection means of the embodiment is for detecting an overload state, and uses an overcurrent detection device for the motor 6, for example. That is, the motor 6 uses a DC motor, and when the object 11 is lifted from the lowered position of the lighting fixture of FIG. 1 and sandwiched by the lifting device 1 and the lighting fixture 2 as shown in FIG. 2, the motor 6 is in a motor lock state. And overcurrent flows. This overcurrent is detected by the overcurrent detection device.

The control means 3 of the embodiment controls the elevation of the luminaire 2, and controls the elevating device 1 so that the luminaire 2 is slightly lowered when receiving the detection signal of the detection means. That is, the control means 3 receives the detection signal of the overcurrent detection device, sends the instruction for driving the motor 6 in the reverse direction in the rotation direction of the motor 6 by the control means 3, and sends the instruction for driving the motor 6 for a certain period of time, and stops when the instruction disappears. As a result, the luminaire 2 is slightly lowered as shown in FIG. 3, and the object 11 can be taken out.

Further, in the embodiment, the lighting device 2 is controlled to be turned off in response to the detecting means. According to this embodiment, the luminaire 2 moves up and down by the operation of the elevating device 1, but an object is sandwiched between the luminaire 2 and the elevating device 1 while the luminaire 2 is rising, or the luminaire 2 is descending. When it hits an object, the detection means operates to operate the control means 3 to control the lighting fixture 2 in a safe state.

In this case, since the control means 3 stops the luminaire 2 by the operation of the detection means and moves up and down a little in the direction opposite to that before the stop, the object 11 including the hand and the arm is moved in the upward movement of the luminaire 2. The object 11 and the lighting fixture 2 can be recognized with being pinched, damage can be prevented, and the object 11 can be easily removed from the pinched position. In addition, since the lighting fixture 2 does not drop slightly and stops and continues to fall, it is possible to avoid an unexpected situation without accidentally hitting an object under the lighting fixture 2. That is, since it is originally intended to move the lighting fixture 2 upward, it is expected that an unexpected situation will occur if it continues to move in the opposite direction regardless of its intention.

Further, since the control means 3 stops and turns off the luminaire 2 by the operation of the detecting means, even if the luminaire 2 continues to be in contact with an object, the luminaire 2
Since the object 11 is not heated by the lamp heat, the danger can be prevented without causing a disaster such as smoking or ignition. In this embodiment, the control means 3 reverses the luminaire 2 for a certain period of time by the operation of the detection means, and stops the raising and lowering of the luminaire 2 and turns off the light. However, only the reversal of the luminaire 2 or the illumination is performed. The lifting and lowering of the device 2 may be stopped and turned off.

A second embodiment of the present invention is shown in FIG. That is, this lifting type lighting fixture has no pulleys 7 and 7'as compared with the first embodiment, and has only one wire 4. Others are the same as those in the first embodiment. A third embodiment of the present invention is shown in FIGS. That is,
This elevating type luminaire has a detecting means for the control means 3 to detect that the luminaire 2 hits the object 12 while the luminaire 2 is descending, and the elevating device 1 so that the luminaire 2 is slightly elevated. Are in control. 16 is the floor surface.

As shown in FIG. 8, the detecting means comprises a pulley 7'movable up and down, a slack detecting limit switch 13, a wire slip stopper 14, and a spring 15 for pulling up the pulley 7 '. ing. Normally, the lever 13a of the slack detection limit switch 13 is engaged with the pulley 7'and the pulley 7'is pushed down by the weight of the lighting fixture 2, so that the slack detection limit switch 13 is in the ON state.

As shown in FIG. 11, the control means 3 comprises an elevation control block 3a and an illumination control block 3b. Upon receipt of a signal from the detection means, the elevation control block 3a reverses the elevation operation to operate for a certain period of time to perform illumination control. The lamp 10 is turned off by the block 3b. That is, when there is an object 12 under the luminaire 2, when the luminaire 2 descends from the raised position of the luminaire 2 in FIG. 6 and the luminaire 2 hits the object 12 as shown in FIG. Since the wire 4 sags because the rotation continues, and the pulley 7 ′ loses its own weight of the luminaire 2, the pulley 15 ′ is pulled upward by the spring 15 to the state shown in FIG. Lever 13a goes up and is turned off. Further, since the pulley 7'is pushed up to the slip stopper 14, the wire 4 is sandwiched between the slip stopper 14 and the pulley 7 ', and the slack of the wire 4 between the drum 5 and the pulley 7'is eliminated. When the sag detecting limit switch 13 is turned off, the elevating control block 3a of the control means 3 is operated, the motor 6 is rotated in the reverse direction, and the luminaire 2 is stopped when a certain time has elapsed as shown in FIG. Simultaneously with the reverse rotation, the lighting fixture 2 is turned off by the operation of the lighting control block 3b.

According to this embodiment, in the descending operation of the luminaire 2, the object 12 and the luminaire 2 are slightly raised after hitting the object 12, so that the object 12 and the luminaire 2 can be prevented from being damaged, and the failure of the lifting device 1 such as a wire. It is possible to prevent the protrusion of the drum No. 4 from the drum 5 and the entanglement. Further, the control means 3
However, since the luminaire 2 is stopped and turned off by the operation of the detection means, even if the luminaire 2 continues to be in contact with the object 12, the lamp heat of the luminaire 2 causes an object such as a combustible material. Because 12 is not heated, it does not lead to smoke or fire,
Danger can be prevented. There are other effects similar to those of the first embodiment.

In this embodiment, the operation of the detecting means causes the control means 3 to reverse the luminaire 2 for a certain period of time, and stop the raising and lowering of the luminaire 2 and turn off the lights, but only the reversal of the luminaire 2 is performed. Alternatively, it is only necessary to stop the lifting and lowering of the lighting fixture 2 and turn off the light.

[0022]

According to the elevating and lowering luminaire of the first aspect of the invention, the illuminating device is moved up and down by the operation of the elevating device. When the fixture hits an object while descending, there is an effect that the detection means operates to activate the control means to control the lighting fixture in a safe state.

According to the raising / lowering type lighting fixture of claim 2, in claim 1, the control means stops the lighting fixture by the operation of the detecting means and raises / lowers a little in a direction opposite to that before stop. In addition to the effect of claim 1, it is possible to recognize that an object including a hand or an arm is caught in the raising motion of the lighting fixture, and the object and the lighting fixture are less adversely affected and can be prevented from being damaged. Easy to remove In addition, since the lighting equipment does not drop slightly and stop and continue to fall, it is possible to avoid an unexpected situation without accidentally hitting an object under the lighting equipment. Further, in the descending operation of the lighting fixture, since it slightly rises after hitting an object, it is possible to prevent a failure of the elevating device, for example, a wire sticking out from the drum or a entanglement.

According to a third aspect of the present invention, in the first or second aspect, the control means stops and turns off the luminaire by the operation of the detecting means. Also, in addition to the effect of claim 2, even if the lighting equipment continues to be in contact with the object, it does not heat the object due to the lamp heat of the lighting equipment, so it does not lead to a disaster such as smoking or ignition, thus preventing danger. can do.

[Brief description of drawings]

FIG. 1 is a side view of a lighting fixture according to a first embodiment of the present invention in a lowered state.

FIG. 2 is a side view of the lighting fixture in a raised state.

FIG. 3 is a side view showing a state in which the lighting fixture is slightly lowered after sandwiching an object.

FIG. 4 is an explanatory diagram of a control system.

FIG. 5 is a side view of a lighting device according to a second embodiment.

FIG. 6 is a side view of the lighting fixture of the third embodiment in a raised state.

FIG. 7 is a side view showing a state where the lighting fixture is lowered and hits an object.

FIG. 8 is a side view of the state before detection by the detection means.

FIG. 9 is a side view of the detection state.

FIG. 10 is a side view showing a state in which the lighting fixture is slightly raised after hitting an object.

FIG. 11 is an explanatory diagram of a control system of a third embodiment.

[Explanation of symbols]

 1 Lifting device 2 Lighting equipment 3 Control means

Claims (3)

[Claims] 1. An elevating device, a luminaire suspended by the elevating device and elevating, and a case where an object is sandwiched between the luminaire and the elevating device while the luminaire is ascending and the illuminating device. An elevating lighting fixture comprising: a control unit that has a detection unit that detects one of the cases where the lighting fixture hits an object while the fixture is descending, and a control unit that controls the lighting fixture to a safe state. 2. The elevating luminaire according to claim 1, wherein the control means stops the luminaire by the operation of the detecting means, and slightly elevates and lowers in a direction opposite to that before the stop. 3. The elevating luminaire according to claim 1, wherein the control means stops the luminaire and turns off the luminaire by the operation of the detecting means.