JPH0791027B2 - Elevator for hanging equipment for stage, banquet hall or studio - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention pipes various kinds of lighting equipment such as spotlights and chandeliers used in the stage, studio, banquet hall, etc. or various suspended objects such as signboards, microphones, broadcasters such as speakers, etc. When a suspended object with an overload that exceeds safety is added to the baton when it is hung from a baton such as a bar or rod and lifted to a predetermined height position, the suspended object is lifted from the floor at a low height. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension overload detection drive control device that can be stopped quickly at a position and an accident can be prevented.

[0002]

2. Description of the Related Art Conventionally, suspended objects such as various lighting fixtures, signboards, and broadcasting equipment used in the stage, studio, banquet hall, etc. are hung on batons such as pipes and rods, and the batons are wire-connected through pulleys. Suspended with, winding wire, rewinding motor
Drive the suspended object suspended in the baton to a predetermined height, and the upper limit switch operates at a predetermined height position to stop the drive of the motor. In addition, a pulley with a limit switch is supported by a spring, and the load of the suspended object is detected by spring tension, or the drive current of the winding / rewinding motor when the suspended object is raised is detected. However, there is a method of detecting an overload of a suspended object.

[0003]

In the above-described system in which the drive of the motor is stopped by the operation of the upper limit switch, the wire is wound up only when the suspended object rises and reaches a predetermined height. , If the suspended object exceeds the allowable limit because the drive of the rewinding motor stops, or if the suspended object weight is within the allowable limit, the baton does not touch the surrounding objects. If it gets caught, there is a risk that an overload exceeding the safety will be applied to the baton and the suspended object that is hung at a high position will fall, or even unnecessary surrounding objects will be lifted. There was a drawback that it could pose a danger to the person directly underneath and damage the baton or suspended objects.

Further, when the pulley with limit switch is supported by a spring, the elasticity of the spring deteriorates with time, and there is a drawback that the load control of the suspended object cannot be performed safely and reliably. Furthermore, the method of detecting the overload load of the suspended motor by detecting the drive current of the motor for winding and rewinding the wire when the suspended object rises may cause malfunctions because the drive current is not stable. Therefore, it is difficult to detect an overload of a suspended object, and a malfunction occurs due to deterioration of the efficiency of the motor as the motor is used over time. The present invention has been made in view of the above points, and an object of the present invention is to suspend a suspended object from a baton when the load exceeds a preset value, or when the baton catches a person or an object in the vicinity. When a trouble occurs, it is possible to stop the driving of the wire winding and rewinding motor at the initial stage when the baton and its suspended object placed at a low position on or near the foundation such as the floor start to rise. It is possible to prevent the danger of falling suspended objects and to stop the driving of the wire winding and rewinding motor at the initial stage when trouble occurs such as the baton catching nearby people or objects. It is possible to provide an elevator for hanging equipment for a stage, a banquet hall, or a studio, which is highly safe.

[0005]

The elevator for a stage, banquet hall or studio suspension equipment according to the present invention has a baton for suspending the stage, banquet hall or studio suspension equipment at predetermined intervals. Fix one end of the wire, hang it so that each wire is oriented vertically and maintain the baton horizontally, and at the middle of each wire a pulley provided at a predetermined height position from the foundation such as the floor. Hanging, each wire is stretched in the horizontal direction, the other end side is connected to a wire winding and rewinding machine, and the baton arranged at the lower position of the foundation or the vicinity thereof is set as a rising start point, and the baton is Winding of the wire to raise or lower, the input electric power extractor which detects the load current and load voltage of the motor after a short time has elapsed from the start of rising rotation of the motor attached to the rewinding machine, and extracts the electric power as electric power, A monitor that compares the input power from the input power extractor with the set power obtained by converting the allowable load load of the baton to power and displays the result, and detects the signal when the input power exceeds the set power. , A sequencer for stopping the drive of the winding / rewinding motor, and a release mechanism for releasing the drive stop of the winding / rewinding motor when the input power becomes less than the set power, and the winding after release , And a controller for re-driving the rewinding motor.

[0006]

In order to raise the suspended object while suspending the suspended object on the baton suspended by the wire, the wire winding and rewinding motor is driven to be hung on the pulley. The wire may be wound by the motor. During this winding, if a suspended object that exceeds the allowable weight is suspended in the baton, the wire is wound by the input power extractor and the rewinding motor is rotated upward (forward rotation). ) The load current when a predetermined short time has elapsed from the start is detected, and it is taken out as the input power by the load voltage from the motor. This input power is compared and calculated with the set power set by converting the allowable load load of the baton into power in advance,
When the set power is exceeded, a warning message such as an alarm or buzzer is displayed on the monitor, the sequencer is activated, and the drive of the winding and rewinding motor is stopped. Therefore, the suspended object suspended in the baton stops at a low position slightly elevated from the foundation such as the floor.

When the baton is stopped at a low position, the suspended object for the weight over which is suspended on the baton is removed from the baton, and the suspended object within the allowable weight range is suspended on the baton. Then, the release mechanism releases the drive stop of the wire winding and rewinding motor. After the driving stop of the winding and rewinding motor is released, the motor is driven again to wind the wire and raise the suspended object from the foundation such as the floor to a predetermined position. . In order to lower the suspended object suspended at a predetermined height position to the foundation such as the floor, the wire winding / rewinding motor may be reversely rotated to rewind the wire. . Thus, the suspended object can be exchanged and suspended depending on the place and the situation within the allowable weight range.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a schematic explanatory view showing an embodiment of the present invention. Reference numeral 1 denotes a baton composed of a pipe, a rod or the like, and several portions of the baton 1 are connected via a pulley 2 to a vertically hung wire-3, which is normally supported horizontally. Baton 1
Various luminaires such as spotlights and chandeliers used in a stage, a studio, a banquet hall, etc., or various suspended objects 4 such as signboards, microphones, broadcasters such as speakers, etc. are attached thereto. The wire-3 may be a rope, a string or the like as long as it is durable. Reference numeral 5 is a motor for winding and rewinding the wire-3, which is capable of forward and reverse rotation. This mode
A winding-and-rewinding machine (not shown) for the wire-3 is attached to the taper 5.

6 is a motor for winding and rewinding the wire-3.
The input electric power extractor electrically connected to 5 detects the load current when a predetermined short time has elapsed from the start of the wire winding / rewinding motor 5's rising rotation (normal rotation). At the same time, it is taken out as input power by the load voltage from the motor 5. As described above, the electric power is used as the controlled variable without the controlled current of the motor 5 as a controlled variable. Is difficult to detect, and a malfunction such as a malfunction due to deterioration of efficiency of the motor due to use of the motor 5 with time is eliminated. Further, the load current when a predetermined short time has elapsed from the start of the ascending rotation (normal rotation) of the motor 5 is detected because the ascending of the suspended object 4 is stopped at a low position from the floor or the like. This is because the drive current at the time of rising rotation (forward rotation) start is unstable and stable control is difficult.

Reference numeral 7 is a monitor for comparing and calculating the input power from the input power extractor 6 and the set power obtained by converting the allowable load load of the baton 1 into the power.
The monitor 7 is provided with an alarm for displaying a warning and / or a warning display such as a buzzer. The allowable load of the baton 1 is converted into electric power in advance in consideration of the safety factor and the like, so that the operator can set the set electric power finely at any time according to the applied baton 1.
The monitor-7 compares and calculates the input power and the set power, and displays a warning when the input power value exceeds the set power value, but does not display a warning when the input power value does not exceed the set power value.

Reference numeral 8 is a sequencer which detects a signal when the input power value exceeds the set power value and stops the driving of the winding and rewinding motor 5. The operation of the sequencer 8 stops the driving of the winding and rewinding motor 5. Then, the suspended object 4 suspended on the baton 1 stops at a low position slightly elevated from the foundation such as the floor. 9 is provided with a release mechanism (not shown) for releasing the drive stop of the winding / rewinding motor 5 when the input power value is less than the set power value, and for winding / rewinding after the release. Mode
It is a controller for re-driving the ta-5.

[0012] The suspended object 4 for the weight over which is suspended from the baton 1 in a state where the baton 1 is stopped at a low position is attached to the baton 1.
Then, the suspended object 4 within the allowable weight range is suspended from the baton 1. Then, the driving stop of the winding and rewinding motor 5 of the wire 3 is released by the release mechanism by the button operation or the like. After the driving stop of the winding and rewinding motor 5 is released, the motor 5 is driven again to wind the wire 3 and the suspended object 4 from the foundation such as the floor in a predetermined manner. Raise to position. A position detector (not shown) may be used to raise the suspended object 4 and stop it at a predetermined height position. To hang the suspended object 4 suspended at a predetermined height position on a foundation such as a floor, a wire-3 winding / unwinding motor is used.
The wire 5 may be unwound by rotating the wire 5 in the reverse direction. Thus, the suspended object 4 can be suspended from the baton 1 by exchanging the suspended object 4 at any time within the allowable weight range depending on the place and the situation.

[0013]

As can be seen from the above description, the present invention secures one end of each wire at a predetermined interval to a baton for suspending hanging equipment for a stage, a banquet hall, or a studio and attaches each wire. Hang so as to maintain the baton in the vertical direction in the vertical direction and hang it on a pulley provided at a predetermined height position from the foundation such as a floor while suspending each wire in the horizontal direction, Winding and rewinding the wire, which has its other end connected to a wire winding and rewinding machine, and which uses the baton arranged at the lower position of the foundation or its vicinity as a starting point to raise or lower the baton. An input power extractor that detects the load current and load voltage of the motor after a short period of time has elapsed from the start of rising rotation of the motor attached to the machine, and extracts the power as power, and the input power from the input power extractor and the The monitor that displays the result by comparing and calculating the set power that is obtained by converting the allowable load load of the power into the power, and the signal when the input power exceeds the set power is detected to drive the winding and rewinding motor. Equipped with a sequencer to stop the operation, and a release mechanism to release the drive stop of the winding and rewinding motor when the input power is less than the set power,
Since a controller for re-driving the winding / rewinding motor after the release is provided, the following unique effects are achieved.

That is, various kinds of lighting equipment such as spotlights and chandeliers used in the stage, studio, banquet hall, etc., or various suspended objects such as signboards, microphones, broadcasting equipment such as speakers, etc. are hung on batons such as pipes and bars. When a suspended object with an overload that exceeds safety is added to the baton when it is lifted to a predetermined height position, or the suspended object weight is within the allowable limit, but the baton is surrounded by objects or people. In the case of being caught on the floor, it is possible to quickly stop the rising of the suspended object at a relatively low position from the foundation such as the floor. There is very little, and unnecessary surrounding objects and people are not lifted to a high position, accidents can be prevented in advance, and it is a highly safe stage Banquet for or studio for hanging material equipment of the elevator can be obtained. In addition, the baton requires a certain length in order to suspend various lighting fixtures such as spotlights and chandeliers used in the stage, studio, banquet hall, etc. or various suspended objects such as signboards, microphones, broadcasting equipment such as speakers, etc. In addition, when a plurality of batons are used in combination, a certain expansive space is required, and the elevator according to the present invention that is often installed in a small indoor space is a case where an overloaded heavy suspended object is simply added to the baton. Not only the prevention of the above, but even if the surrounding obstacles or clothes or tools worn by people etc. are caught in the baton, as a result, the raising of the baton can be stopped at a low position, resulting in obstacles in the vicinity. Does not cause damage or harm to people.

A motor for winding and rewinding the wire
Since it was decided to detect the load current and load voltage of the motor after a short time has elapsed from the start of rising rotation of and to extract it as electric power, unlike the case of detecting the current, it is stable,
Stable control with high sensitivity is possible. Further, since the allowable weight of the suspended object suspended on the baton is converted into the electric power value and set as the set power, the desired set power can be set finely and the weight can be set over a wide range. Furthermore, when the weight of the baton exceeds the allowable limit, a warning is displayed by an alarm, buzzer, etc., and the wire is wound unless the suspended object exceeding the allowable limit is removed from the baton. , The rewinding motor is not driven and remains stopped, and the motor is restarted after confirming that the weight hung on the baton is within the allowable limit. Therefore, it is highly safe.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of the present invention.

[Explanation of symbols]

 1 Baton 2 Pulley 3 Wire 4 Suspended object 5 Wire winding / unwinding motor 6 Input power extractor 7 Monitor 8 Sequencer 9 Controller

Claims (1)

[Claims] 1. One end of a wire is fixed to a baton for suspending hanging equipment for a stage, a banquet hall or a studio at predetermined intervals, and the baton is horizontally oriented with each wire oriented vertically. While hanging so as to maintain it, hang the middle of each wire on a pulley provided at a predetermined height position from the foundation such as the floor, tension each wire horizontally, and wind and wind the other end side of the wire. A baton connected to a rewinding machine and placed at a low position near the foundation or in the vicinity thereof as a starting point of winding, winding up the wire to raise or lower the baton, and starting up rotation of a motor attached to the rewinding machine. Input power extractor that detects the load current and load voltage of the motor after a short period of time and extracts as electric power, and the setting that converts the input power from the input power extractor and the allowable load load of the baton into electric power A monitor that compares and calculates the electric power and displays the result, a sequencer that detects the signal when the input power exceeds the set power and stops the drive of the winding and rewinding motor, and the input power is set A stage equipped with a release mechanism that releases the drive stop of the winding and rewinding motor when the power becomes less than the power, and a controller that re-drives the winding and rewinding motor after release for,
Lifts for hanging equipment for banquet halls or studios.