JP3942647B2 - Elevating lighting fixture - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a liftable lighting fixture.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been a lifting type lighting fixture that lifts and lowers a lighting fixture in a state in which the lighting fixture can be turned on or impossible by suspending the lighting fixture from the lifting device.
[0003]
[Problems to be solved by the invention]
However, when the luminaire is raised and an object including an arm is sandwiched between the luminaire and the lifting device, there is a risk of damaging the object or the luminaire.
Similarly, when the lighting fixture descends and hits an object, there is a risk that the lifting device may break down due to damage to the article or the lighting fixture or loosening of the wire of the lifting device.
[0004]
Accordingly, an object of the present invention is to provide a liftable lighting device that can prevent damage to an object or a lighting device even if the lighting device pinches or hits the object.
[0005]
[Means for Solving the Problems]
A lifting / lowering illumination device according to claim 1 is a lifting device comprising a forward / reverse rotation motor and a drum for winding a wire, a lighting device suspended and lifted by the lifting device, and a cord reel provided in the lifting device; A cord wound on the cord reel and having a tip connected to the lighting fixture, and a case where an object is sandwiched between the lighting fixture and the lifting device while the lighting fixture is being raised, and a lowering of the lighting fixture. Control means for controlling the lighting fixture to a safe state by having a detection means for detecting when the lighting fixture hits an object inside,
The detection means when an object is caught during ascending is an overcurrent detection device that detects an overcurrent of the forward / reverse rotation motor in a motor locked state,
When the object hits during lowering, the detection means includes a pulley on which the wire is hung, a spring for pulling up the pulley against the pulling force of the wire, and the spring pulled up by the spring when the wire is slackened. A wire slip stopper that contacts the wire on the pulley and positions the pulley against the spring, and a limit switch that detects movement of the pulley when the pulley is slack,
The control means stops and extinguishes the luminaire by the operation of the detection means, and moves up and down slightly in a direction opposite to that before the stop.
[0007]
[Action]
According to the lifting / lowering lighting device of claim 1, the lighting device is moved up and down by the operation of the lifting device, but an object is sandwiched between the lighting device and the lifting device while the lighting device is being lifted or the lighting device is being lowered. When it hits an object, the detection means operates, so that the control means can be operated to control the luminaire to a safe state.
[0008]
In addition, since the control means stops the lighting fixture by the operation of the detection means and moves up and down slightly in the direction opposite to that before the stop, it can be recognized that an object including a hand or an arm is caught in the raising operation of the lighting fixture. At the same time, there is little adverse effect on the object and the lighting fixture, damage can be prevented, and the object can be easily removed from the sandwiched position. In addition, since the lighting fixtures are lowered slightly and do not stop and continue to fall, it is possible to avoid an unexpected situation without inadvertently hitting the objects under the lighting fixtures. Further, in the lowering operation of the luminaire, since it is lifted slightly after hitting an object, it is possible to prevent the lifting device from being broken, for example, the wire protruding from the drum or tangled.
[0009]
Further said control means, said stop the luminaire by the operation of the detecting means, and for turning off, even if other example luminaire continues the state in contact with the object, the lamp heat in objects luminaire Since the heat is not heated, it does not lead to disasters such as smoke and fire, and danger can be prevented.
[0010]
【Example】
A first embodiment of the present invention will be described with reference to FIGS. That is, the liftable lighting fixture includes a lifting device 1, a lighting fixture 2, and a control means 3.
The lifting device 1 includes a drum 5 for winding 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 for winding the cord 8. And a reel 9. The drum 5 is wound up by rotating the motor 6 in one direction, the rewinding operation is performed by rotating in the other direction, the lighting fixture 2 is raised by the winding operation, and the lighting fixture 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).
[0011]
The lighting fixture 2 is lifted and lowered by being hung by the wire 4 of the lifting device 1. The lighting fixture 2 of the embodiment has a pair of lamps 10. Further, 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 raised, lowered and stopped, so that it can be turned on and off.
The control means 3 has a detection means for detecting when an object 11 is sandwiched between the lighting fixture 2 and the lifting device 1 while the lighting fixture 2 is raised, and controls the lighting fixture 2 to a safe state.
[0012]
The detection means of the embodiment detects an overload state, and uses, for example, an overcurrent detection device for the motor 6. That is, the motor 6 uses a DC motor, and when the object 11 is sandwiched between the lifting device 1 and the lighting fixture 2 as shown in FIG. 2 ascending from the lowered position of the lighting fixture in FIG. And overcurrent flows. This overcurrent is detected by an overcurrent detection device.
[0013]
The control means 3 of an Example controls the raising / lowering of the lighting fixture 2, and will control the raising / lowering apparatus 1 so that the lighting fixture 2 may descend | fall a little, if the detection signal of a detection means is received. That is, the control means 3 receives the detection signal from the overcurrent detection device, and reverses the rotation direction of the motor 6 by the control means 3 and sends an instruction to drive the motor 6 for a certain period of time. Thereby, as shown in FIG. 3, since the lighting fixture 2 falls a little, the thing 11 can be taken out.
[0014]
Furthermore, in an Example, it controls so that the lighting fixture 2 may be extinguished in response to a detection means.
According to this embodiment, the lighting fixture 2 is moved up and down by the operation of the lifting device 1, but an object is sandwiched between the lighting fixture 2 and the lifting device 1 while the lighting fixture 2 is rising, or the lighting fixture 2 is being lowered. When the object hits the object, the detection means operates to operate the control means 3 to control the lighting fixture 2 to a safe state.
[0015]
In this case, since the control means 3 stops the lighting fixture 2 by the operation of the detection means and moves up and down slightly in the direction opposite to that before the stop, the thing 11 including the hand and arm is caught in the raising operation of the lighting fixture 2. Can be recognized, damage to the object 11 and the luminaire 2 can be prevented, and damage can be prevented, and the object 11 can be easily removed from the sandwiched position. Moreover, since the lighting fixture 2 is lowered a little and does not stop and keep falling, it is possible to avoid an unexpected situation without inadvertently hitting an object under the lighting fixture 2. That is, since the lighting fixture 2 is originally moved for the purpose of raising, it is expected that an unexpected situation will occur if it continues to move in the opposite direction regardless of its intention.
[0016]
Further, since the control means 3 stops and turns off the luminaire 2 by the operation of the detection means, even if the luminaire 2 is in contact with the object, the lamp 11 of the luminaire 2 keeps the object 11 Since the heat is not heated, it does not lead to disasters such as smoke and fire, and danger can be prevented.
In this embodiment, the control means 3 reverses the lighting fixture 2 for a certain period of time and stops raising and lowering the lighting fixture 2 and turns off the lighting fixture 2 by the operation of the detection means. Only the stop of raising and lowering of the appliance 2 and the extinction may be used.
[0017]
A second embodiment of the present invention is shown in FIG. That is, this elevating-type lighting fixture does not have pulleys 7 and 7 'and has only one wire 4 as compared with the first embodiment. Others are the same as the first embodiment.
A third embodiment of the present invention is shown in FIGS. That is, this elevating-type lighting fixture has a detecting means for detecting that the lighting fixture 2 has hit the object 12 while the lighting fixture 2 is lowered, and the raising / lowering lighting fixture 2 is moved up and down so that the lighting fixture 2 is slightly raised. The apparatus 1 is controlled. Reference numeral 16 denotes a floor surface.
[0018]
As shown in FIG. 8, the detection means includes a pulley 7 'movable up and down, a sag detection limit switch 13, a wire slip stopper 14, and a spring 15 for pulling up the pulley 7'. Normally, since the lever 13a of the sag 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, the sag detection limit switch 13 is in an ON state.
[0019]
As shown in FIG. 11, the control means 3 is composed of an elevation control block 3a and an illumination control block 3b. Upon receiving a signal from the detection means, the elevation control block 3a reverses the elevation operation and operates for a certain period of time, and the illumination control block 3b The lamp 10 is turned off. 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 lighting fixture 2, the pulley 7' is pulled upward by the spring 15 to the state shown in FIG. The lever 13a is raised and turned off. Since the pulley 7 'is pushed up to the anti-slip 14, the wire 4 is sandwiched between the anti-slip 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 detection limit switch 13 is turned off, the elevating control block 3a of the control means 3 operates to reverse the motor 6, and the luminaire 2 stops when a certain time elapses 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.
[0020]
According to this embodiment, the lowering operation of the luminaire 2 is slightly lifted after hitting the object 12, so that damage to the object 12 and the luminaire 2 can be prevented, and the failure of the lifting device 1, for example, the drum of the wire 4 can be prevented. It is also possible to prevent overhang and entanglement from 5.
Moreover, since the control means 3 stops and turns off the lighting fixture 2 by the operation of the detection means, even if the lighting fixture 2 continues to be in contact with the object 12, it is combustible by the lamp heat of the lighting fixture 2. Since the object 12 such as an object is not heated, it does not lead to a disaster such as smoke or fire, and danger can be prevented. The other effects are the same as those of the first embodiment.
[0021]
In this embodiment, the control means 3 reverses the lighting fixture 2 for a certain period of time and stops raising and lowering the lighting fixture 2 and turns off the lighting fixture 2 by the operation of the detection means. Only the stop of raising and lowering of the appliance 2 and the extinction may be used.
[0022]
【The invention's effect】
According to the lifting / lowering lighting device of claim 1, the lighting device is moved up and down by the operation of the lifting device, but an object is sandwiched between the lighting device and the lifting device while the lighting device is being lifted or the lighting device is being lowered. In the case of hitting an object, there is an effect that the detection means operates to operate the control means and to control the lighting apparatus in a safe state.
[0023]
The Stop the luminaire by the operation of said control means said sensing means, and to slightly lift the opposite direction as before shutdown, recognized that caught things including hand and arm in the upward movement of the luminaire In addition, the object and the lighting apparatus are hardly adversely affected, damage can be prevented, and the object can be easily removed from the pinched position. In addition, since the lighting fixtures are lowered slightly and do not stop and continue to fall, it is possible to avoid an unexpected situation without inadvertently hitting the objects under the lighting fixtures. Further, in the lowering operation of the luminaire, since it is lifted slightly after hitting an object, it is possible to prevent the lifting device from being broken, for example, the wire protruding from the drum or tangled.
[0024]
Further said control means, said stop the luminaire by the operation of the detecting means, and for turning off, even if other example luminaire continues the state in contact with the object, the lamp heat in objects luminaire Since the heat is not heated, it does not lead to disasters such as smoke and fire, and danger can be prevented.
[Brief description of the drawings]
FIG. 1 is a side view showing a lowered state of a lighting fixture according to a first embodiment of the present invention.
FIG. 2 is a side view of the lighting device in a raised state.
FIG. 3 is a side view showing a state where the lighting apparatus is lowered slightly after an object is sandwiched between them.
FIG. 4 is an explanatory diagram of a control system.
FIG. 5 is a side view of a lighting apparatus according to a second embodiment.
FIG. 6 is a side view of the lighting apparatus according to the third embodiment in a raised state.
FIG. 7 is a side view of a state in which the lighting fixture is lowered and hits an object.
FIG. 8 is a side view of a state before detection by a detection unit.
FIG. 9 is a side view of the detection state.
FIG. 10 is a side view showing a state where the lighting apparatus is slightly raised after hitting an object.
FIG. 11 is an explanatory diagram of a control system of a third embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lifting apparatus 2 Lighting fixture 3 Control means

Claims (1)

A lifting device composed of a forward / reverse rotating motor and a drum for winding a wire, a lighting fixture suspended and lifted by the lifting device, a cord reel provided in the lifting device, and a tip wound around the cord reel When a thing is pinched between the cord connected to the lighting fixture and the lighting fixture and the lifting device while the lighting fixture is being raised, and when the lighting fixture is being lowered, the lighting fixture has hit the thing Control means for controlling the lighting apparatus to a safe state having detection means for detecting the case,
The detection means when an object is caught during ascending is an overcurrent detection device that detects an overcurrent of the forward / reverse rotation motor in a motor locked state,
When the object hits during lowering, the detection means includes a pulley on which the wire is hung, a spring for pulling up the pulley against the pulling force of the wire, and the spring pulled up by the spring when the wire is slackened. A wire slip stopper that contacts the wire on the pulley and positions the pulley against the spring, and a limit switch that detects movement of the pulley when the pulley is slack,
The control means is a liftable luminaire that stops and extinguishes the luminaire by the operation of the detection means, and moves up and down slightly in a direction opposite to that before the stop.

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