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KR-20260064397-A - Backdrop Circular Moving Stage Drive System

KR20260064397AKR 20260064397 AKR20260064397 AKR 20260064397AKR-20260064397-A

Abstract

The present invention relates to a batten lifting device structure for a stage, wherein a wire (300) is formed to be connected to a stage structure and capable of vertically raising and lowering, by being wound around a screw rotating drum (200) that is rotated in conjunction with a driving motor (100) provided on one side to raise and lower a stage structure, and wherein a position control limit (110) is provided on the side of the outer frame (130) of the driving shaft (120) to detect the rotational torque of the screw rotating drum (200) that is moved in conjunction with a driving shaft (120) connected to the driving motor (100), and a load cell (150) inserted into the side of a bottom plate (140) that is fixedly connected to the bottom side of the outer frame (130), and wherein the load cell (150) detects that the rotational torque of the screw rotating drum (200) exceeds a set value and stops the driving of the driving motor (100) through a control unit (400). The invention is characterized by having a plurality of defect detection sensors (310) on the outer surface of the screw rotating drum (200), and when current is transmitted between the defect strand (310) that is defective in the wire (300) which is wound into multiple strands and formed into one, and the defect detection sensors (310), the signal is applied to the control unit (400) to stop the operation of the drive motor (100). The present invention relates to a background screen circulation moving stage equipment drive system that has the effect of preventing safety accidents caused by falling, which may occur when a wire is damaged due to excessive load, by stopping the operation of the drive device when the load of the stage equipment structure connected to the drive device is excessive, thereby extending the service life and preventing safety accidents caused by falling, which may occur when the wire is damaged due to excessive load.

Inventors

  • 김영무

Assignees

  • (주)하온아텍

Dates

Publication Date
20260507
Application Date
20241031

Claims (10)

  1. A wire (300) is formed to enable vertical movement of a stage equipment structure by being wound around a screw rotating drum (200) that is rotated in conjunction with a drive motor (100) provided on one side, and connected to the stage equipment structure, thereby enabling vertical movement; a position control limit (110) is provided on the side of the outer frame (130) of the drive shaft (120) to detect the rotational torque of the screw rotating drum (200) that is moved by a drive shaft (120) connected to the drive motor (100); a load cell (150) is inserted into the side of the bottom plate (140) that is fixedly connected to the bottom side of the outer frame (130); and the load cell (150) detects that the set value of the rotational torque of the screw rotating drum (200) is exceeded, and the drive of the drive motor (100) is stopped through a control unit (400). Background screen circulation movable stage equipment drive system.
  2. In paragraph 1, A plurality of defect detection sensors (310) are provided on the outer surface of the screw rotating drum (200), and when current flows between the defect strand (310) that is defective in the wire (300) which is wound into multiple strands and formed into one, and the defect detection sensors (310), the signal is applied to the control unit (400) to stop the operation of the drive motor (100). Background screen circulation movable stage equipment drive system.
  3. In paragraph 1, An outer frame (130) is provided to surround the outer edge of a drive shaft (120) that is rotated by the above drive motor (100), and a lower plate (140) is configured to be connected to the lower side of the outer frame (130). Background screen circulation movable stage equipment drive system.
  4. In paragraph 1, As shown in the drawing, a load cell (150) is provided on the lower plate (140) side, and the load cell (150) is electrically connected to a control unit (400) for controlling the stopping and operation of the drive motor (100) by receiving a signal from the load cell (150). Background screen circulation movable stage equipment drive system.
  5. In paragraph 1, The above load cell generally refers to a strain gauge that converts deformation into electrical resistance attached to the circumference of a steel rod, wherein an electrical output is generated in proportion to the magnitude of the applied load. Background screen circulation movable stage equipment drive system.
  6. In paragraph 5, When the above-mentioned Strain Gauge is attached to a metal elastic body and a load is applied to the elastic body, an electrical output signal proportional to the magnitude of the applied load can be obtained as a change in the resistance value of the Strain Gauge, and the present invention takes this into account and forms a lower plate (140) on the lower side of the outer frame (130) forming the outer edge of the position control limit (110) of the load cell (150), and inserts the load cell (150) into the lower plate (140) so that the end of the load cell (150) contacts a frame (240) provided at the side end of the screw rotating drum (200), thereby obtaining the resistance value of the load of the stage equipment structure suspended from the batten on the wire (300) that is wound around the screw rotating drum (200) and connected to the batten as an electrical output signal. Background screen circulation movable stage equipment drive system.
  7. In paragraph 6, The above electrical signal value is applied to the control unit (400) to read whether the electrical signal value is within the allowable limit range, and when a signal value exceeding the allowable range is detected, the control unit (400) stops the operation of the drive motor (100). Background screen circulation movable stage equipment drive system.
  8. In paragraph 1, As shown in the drawing, the screw rotating drum (200) is formed with a ridge (210) and a groove (220) forming a screw thread shape on its outer surface, and a frame (240) for supporting the screw rotating drum (200) is provided on each end. Background screen circulation movable stage equipment drive system.
  9. In paragraph 1, A plurality of wires (300) are wound by a certain stroke distance from the starting end of the wire (300) while being spaced apart at equal intervals on the outer surface of the screw rotating drum (200) formed by the above-mentioned peaks (210) and valleys (220), so that the wires are repeatedly wound through the screw rotating drum (200) while being spaced apart. Background screen circulation movable stage equipment drive system.
  10. In claim 1, when a wire (300) wound along the position of the groove (220) among the peak (210) and the groove (220) of the screw rotating drum (200) deviates from its original position and is displaced to the position of the peak (210), a wire detachment detection sensor (230) provided on both sides of the screw rotating drum (200) detects this. Background screen circulation movable stage equipment drive system.

Description

Backdrop Circular Moving Stage Drive System Backdrop Circular Moving Stage Drive System The present invention relates to a driving system for a circulating stage device that is intended to raise and lower stage lighting facilities or various stage facilities, and which detects the weight of a facility suspended by a baton that raises and lowers the stage facilities or lighting facilities by means of a wire wound on a rotating drum body linked by the driving of a driving motor, determines whether the weight is appropriate, and controls the operation of a driving device that raises and lowers the baton if the load is excessive, if a defect occurs in the wire wound on the drum, or if safe winding is not achieved on the side of the drum being wound, thereby enabling the elimination of the cause and preventing safety accidents caused by this. It is known that in general, on large stages, as illustrated in FIG. 1, a batten (10) is installed to suspend and raise stage equipment necessary for performance production, such as lighting fixtures, placards, or background screens (hereinafter collectively referred to as stage equipment structures). The batten (10) is raised and lowered by a driving device (D) installed on the upper side of the stage, and each wire (W) connected to the batten (10) is guided by a plurality of rollers (R) fixed to the ceiling of the stage and wound onto a screw rotating drum (22) that is rotated by a driving motor (21) of a lifting driving device (20) provided on one side, and is structured to raise and lower the batten (10). It has been pointed out that in a conventional batten lifting device of this type, even when the load of a stage structure or similar equipment suspended from the batten (10) is excessive, the excessive load cannot be determined, which compromises the safety of the lifting drive device (20), which can lead to safety accidents and shorten the service life of the device. Additionally, the wire (W) connected to raise and lower the above batten (10) is wound onto the screw rotating drum (22) configured to be linked with the above lifting drive device (20), and the wire (W) is wound or unwound while maintaining a state of being seated on the groove side among the screw-shaped peaks and valleys formed on the outer surface of the screw rotating drum (22). However, during the lifting and lowering process of the batten (10), there are cases where the wire (W) deviates from the groove position of the screw rotating drum (22) and moves to the mountain side instead of remaining in that position. Even when the wire (W) deviates from its position and does not remain in the correct position, the lifting drive device (20) continues to rotate, causing the wire (W) to become tangled. Consequently, there is a risk that a uniformly distributed load will not be generated on the batten (10) and a concentrated load will be generated on one side, which may cause damage to the wire (W) and lead to a safety accident. In addition, if one strand of the wire (W) that is wound in multiple strands by continuous winding and unwinding operations on the screw rotating drum (22) is damaged, the wire (W) will continue to be damaged, and eventually, the wire (W) may break, which may lead to a safety accident. Therefore, although these various problems exist, the conventional elevator drive device (20) does not disclose a component capable of solving these problems, so in the case of a barton elevator that has been in use for a long time, it always contains serious problems regarding safety. FIG. 1 is an overall schematic diagram showing a conventional barton lifting device. FIG. 2 is a schematic diagram illustrating the connection state between a drive motor and a screw rotating drum, which are key parts of the batten lifting device of the present invention. FIG. 3 is a schematic drawing showing a side cross-section of a screw rotary drum with a wire wound around it and a drive motor. FIG. 4 is a schematic diagram illustrating the operational relationship between the wire detachment detection sensor and the defect detection sensor in the present invention. FIG. 5 is a block flowchart for controlling a drive motor through a control unit using signals detected by a load cell, a wire detachment detection sensor, and a defect detection sensor adopted in the present invention. Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in the attached drawings, the present invention is for raising and lowering stage equipment structures such as lighting, placards, screens, and background images (e.g., hanging pictures) installed on a stage, and comprises a baton (not shown in the drawings) connecting the stage equipment structures, a wire (300) connected to the baton, a screw rotating drum (200) for winding the wire (300), a drive shaft (120) for rotating the screw rotating drum (200), and a drive motor (100) for driving the drive shaft (120). F