Device for raising and lowering stage equipment

Abstract

The present invention relates to a stage equipment lifting and lowering device for raising and lowering stage equipment, and more specifically, to a stage equipment lifting and lowering device that reduces errors in the lifting and lowering length of stage equipment caused by wire wear and prevents safety accidents by operating a breaker when the power supply is cut off. The stage equipment lifting and lowering device according to the present invention comprises: two support plates; an aluminum winding drum rotatably provided between the two support plates and having a plurality of winding grooves formed therein for winding steel wires; a support guide roller rotatably provided between the two support plates and matched to each of the winding grooves to support the steel wires and guide their movement; a pair of tension rollers rotatably provided between the two support plates and supporting the steel wires to pass in an S-shape to tension the steel wires tautly; and a motor for rotating the winding drum in forward and reverse directions.

Description

Technology Field

[0001] The present invention relates to a stage equipment lifting and lowering device for raising and lowering stage equipment, and more specifically, to a stage equipment lifting and lowering device that reduces errors in the lifting and lowering length of stage equipment caused by wire wear and prevents safety accidents by operating a breaker when the power supply is cut off. Background Technology

[0003] Generally, various stage equipment is installed near the ceiling of indoor performance venues such as theaters, auditoriums, or concert halls, including lighting fixtures to illuminate the stage, effect equipment to produce effects necessary for the performance, and curtain lifting devices to variably separate the stage from the audience seating. These stage facilities are raised and lowered on the stage by means of lifting and lowering devices.

[0005] Prior art regarding stage equipment lifting and lowering devices includes registered patent 10-1980157 "Safety lifting and lowering device for stage facilities that guides and prevents wire rope detachment" and registered patent 10-0727464 "Lifting and lowering device for stage equipment".

[0006] A stage equipment lifting and lowering device includes a plurality of wires connected to the stage equipment, a winding drum on which the plurality of wires are wound, and a motor that rotates the winding drum in forward and reverse directions to wind or unwind the wires, thereby causing the stage equipment to be raised or lowered. For reference, steel wires are mainly used for the wires. A steel wire is a wire made of woven thin steel metal wires (e.g., iron wires).

[0008] Various safety accidents can occur on stage.

[0009] One of the causes of safety accidents is stage equipment ascending or descending beyond its intended length. Furthermore, one of the reasons for this deviation is wire wear. During the winding and unwinding process, the wire wears down due to friction between the wire and the winding drum, as well as friction caused by contact between the wires. If the wire could initially be wound five times around the winding drum, the number of turns required increases as the wire wears down and becomes thinner; consequently, this results in an error in the stage equipment's ascending and descending length.

[0010] Another cause of safety accidents is when the wire fails to maintain a taut state and becomes loose as it winds up or unwinds, causing it to deviate from its proper position. If the wire deviates from its proper position, various accidents can occur.

[0011] Another cause of safety accidents is the interruption of the power supply. When the power is cut off, stage equipment must remain fixed in place; if it fails to do so and descends, a safety accident may occur. The problem to be solved

[0013] The present invention is an invention developed to prevent safety accidents from occurring in stage equipment, and aims to provide a stage equipment lifting and lowering device that reduces wear on steel wires, maintains a taut tension on the wire while winding the pulley, and immediately activates a breaker when the power supply is cut off to reliably prevent safety accidents. means of solving the problem

[0015] The stage equipment lifting and lowering device according to the present invention for achieving such an objective

[0016] Two support plates;

[0017] An aluminum winding drum rotatably provided between the two support plates and having a plurality of winding grooves formed therein for winding steel wire;

[0018] A support guide roller rotatably provided between the two support plates and matched to each of the winding grooves to support the steel wire and guide its movement;

[0019] A pair of tension rollers rotatably provided between the two support plates and supporting the steel wire to pass in an S-shape to tense the steel wire;

[0020] It comprises a motor that rotates the above-mentioned winding drum in forward and reverse directions.

[0022] And further comprising a chain member connecting the rotation axes of the above pair of tension rollers so that they rotate in conjunction; characterized in that,

[0024] The above motor has a built-in first breaker that operates when the power supply is cut off, and

[0025] The rotation axis of one of the above pair of tension rollers is characterized by being equipped with a second breaker that is driven when the power supply is cut off.

[0027] The apparatus further includes a connecting bar connecting the two support plates, and a bolt fastened to a fastening hole formed in an insertion part of the connecting bar that is inserted into an insertion hole of the support plate.

[0028] A locking piece provided in the insertion part so as to be inserted into and removed from the fastening hole, and a first spring that elastically supports the locking piece so as to be inserted into the fastening hole,

[0029] A plurality of locking grooves are formed in the pin portion of the bolt, and a tool groove into which a tool is inserted is formed in the head of the bolt, and further comprising a blocking piece provided in each of the locking grooves, a push pin coupled to the blocking piece and configured to move back and forth from the tool groove toward the pin portion, and a second spring elastically supporting the push pin to move backward.

[0030] The above-mentioned locking piece is inserted into the above-mentioned locking groove to block the rotation of the above-mentioned bolt, and when the above-mentioned push pin advances, the above-mentioned blocking piece pushes the above-mentioned locking piece in the above-mentioned locking groove to enable the rotation of the above-mentioned bolt. Effects of the invention

[0032] The stage equipment lifting and lowering device of the present invention is a product that can reliably prevent safety accidents by allowing the steel wire to be wound or unwound from the winding drum at the correct position through a support guide roller, thereby reducing wear caused by friction on the winding drum and wear caused by contact between steel wires, and allowing the steel wire to pass in an S-shape through a pair of tension rollers so that the steel wire maintains a taut tension state, and when the power supply is cut off, the first breaker and the second breaker operate in double operation. It is an invention that is very useful for industrial development. Brief explanation of the drawing

[0034] FIG. 1 is a photograph serving as a drawing showing a top view of a stage equipment lifting and lowering device according to the present invention. FIG. 2 is a photograph serving as a substitute for a drawing showing a side view of a stage equipment lifting and lowering device according to the present invention. Figure 3 is a drawing illustrating the difference in appearance when a steel wire is wound on a winding drum before and after wear. FIG. 4 is a drawing featuring a bolt with an anti-loosening function. FIG. 5 is a drawing featuring a third breaker for maintenance work. Specific details for implementing the invention

[0035] Hereinafter, a stage equipment lifting and lowering device according to the present invention will be described in more detail with reference to the drawings.

[0037] Before describing the stage equipment lifting and lowering device according to the present invention in more detail,

[0038] The present invention is capable of various modifications and may take various forms, and embodiments (aspects or examples) are to be described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed forms, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0040] As shown in FIGS. 1 and 2, the stage equipment lifting and lowering device according to the present invention comprises a support plate (20), a winding drum (30), a support guide roller (40), a tension roller (50), a motor (60), and a breaker (70).

[0042] Two of the above support plates (20) are arranged facing each other and are connected through connecting bars (21).

[0044] The winding drum (30) is rotatably provided between the two support plates (20). That is, the rotation axis (31) of the winding drum (30) is rotatably coupled to the two support plates (20).

[0045] The above winding drum (30) has winding grooves (33) formed therein for winding the steel wire (10).

[0046] The steel wire (10) is made by twisting thin steel wires (e.g., iron wires) together, and has high strength while being flexible. The winding drum (30) is made of aluminum. During the process of the steel wire (10) being wound or unwound from the winding drum (30), they come into contact with each other; at this time, the winding drum (30) has low strength, which reduces wear on the steel wire (10).

[0047] Referring to FIG. 3, the steel wire (10) is wound into the winding groove (33) of the winding drum (30). [A] shows that the unworn steel wire (10) is wound three times into the winding groove (33) of the winding drum (30), and [B] shows that the worn and thinned steel wire (10) is wound five times into the winding groove (33) of the winding drum (30). This difference causes an error in the height of the steel wire (10). That is, the stage equipment is raised or lowered to a height different from the intended height through the wire (10), and a safety accident may occur during this process.

[0049] The support guide roller (40) is rotatably provided on a connecting bar (21) that connects the two support plates (20). Each support guide is matched to each of the winding grooves (33) of the winding drum (30). Here, "matched" means that the support guide roller (40) is positioned at a location in the front-rear direction directly above the winding groove (33). In other words, the support guide roller (40) and the winding groove (33) are aligned so that the wire (10) passing through the support guide roller (40) accurately enters the winding groove (33) and contacts the wall of the winding drum (30) forming the winding groove (33), thereby reducing wear.

[0051] The tension roller (50) is rotatably provided on the front side of the two support plates (20).

[0052] The above tension roller (50) is composed of a pair, that is, two, and is positioned vertically on the front side of the two support plates (20).

[0053] The above steel wire (10) passes over the upper tension roller (50) of the pair of tension rollers (50) and then passes under the lower tension roller (50), crossing in an S-shape.

[0054] The above steel wire (10) is transported by the pair of long rollers rotating in opposite directions to each other.

[0055] The above steel wire (10) passes through the pair of tension rollers (50) in an S-shape and is transported while maintaining a taut tension without sagging.

[0056] And the steel wire (10) that passes through the lower tension roller (50) passes through a pulley located at a similar height to the upper tension roller (50) and is connected to the lower stage equipment, so that the wire (10) between the tension roller (50) and the pulley also does not sag and maintains a taut tension state.

[0058] The motor (60) rotates the winding drum (30) in the forward or reverse direction so that the wire (10) is wound onto the winding drum (30) or unwound from the winding drum (30).

[0060] The above breaker includes a first breaker (not shown) embedded in the motor (60) and a second breaker (70) connected to the rotation axis of one of the pair of tension rollers (50).

[0061] The first breaker prevents the rotation axis of the motor (60) from rotating when the power supply is cut off, and the second breaker (70) prevents the rotation axis of the tension roller (50) from rotating when the power supply is cut off, thereby preventing the steel wire (10) from unraveling.

[0062] The first breaker and the second breaker (70) above are activated when the power supply is cut off due to a cause such as a power outage during a stage performance, thereby preventing the wire (10) from coming loose and thus preventing safety accidents.

[0064] The connecting bar (21) to which the above support guide roller (40) is attached is fixedly connected to the two support plates (20) using a bolt (80), and the winding drum (30) or tension roller (50) is fixedly connected to the two support plates (20) using a bearing block to which a rotation axis is attached using a bolt (80).

[0065] Due to vibrations caused by the driving of the motor (60) and the impact of the wire (10) unwinding or winding, the bolt (80) gradually loosens, and then the support guide roller (40) and the winding drum (30) shake. Then, the wire (10) wears out severely, and if the shaking is large, a problem occurs where the wire (10) deviates from its original position.

[0066] Accordingly, the present invention introduces an anti-loosening function to the bolt. The anti-loosening function of the bolt will be explained with reference to FIG. 4.

[0067] A square-shaped insertion part (22) is formed at the end of the connecting bar (21), and the insertion part (22) is inserted into a square-shaped insertion hole formed in the support plate (20). In addition, a fastening hole (23) is formed in the insertion part (22) to which the pin part (81) of the bolt (80) is screw-fastened.

[0068] The insertion part (22) is provided with a locking piece (24) that can be pulled out into the fastening hole (23), and the locking piece (24) is elastically supported by a first spring (25) and pulled out into the fastening hole (23).

[0069] A tool groove (85) is formed in the head (82) of the bolt (80) to allow a tool such as a wrench to be inserted and rotate the bolt (80), and a locking groove (83) is formed on the upper side of the pin portion (81) of the bolt (80) to which the locking piece (24) is inserted and locked.

[0070] The tool groove (85) is provided with a push pin (86) capable of moving back and forth with a pin portion (81), and the push pin (86) is elastically supported by a second spring (87) and moves backward upward.

[0071] Inside the pin portion (81), a blocking piece (84) that moves up and down along the locking groove (83) is provided, and the blocking piece (84) is fixedly coupled to the lower side of the push pin (86).

[0072] When the pin portion (81) of the bolt (80) is inserted into the fastening hole (23) of the insertion portion (22), the locking piece (24) is pushed by the pin portion (81) and drawn into the insertion portion (22). At this time, the push pin (86) is pushed forward by the tool inserted into the tool groove (85), and when the push pin (86) is advanced downward, the blocking piece (84) moves along the locking groove to block and close the lower side of the locking groove (83). When the bolt (80) is tightened and the tool is removed from the tool groove (85), the push pin (86) is retracted upward, and then the blocking piece (84) moves to the upper side of the locking groove (83), opening the lower side of the locking groove (83). When the lower side of the locking groove (83) is opened, the locking piece (24) is pulled out and inserted into the locking groove (83) to lock, thereby preventing the bolt (80) from rotating and thus preventing loosening. Here, even if the locking piece (24) and the locking groove (83) do not initially align and the locking piece (24) is not inserted into the locking groove (83), if the bolt (80) rotates slightly, the locking piece (24) and the locking groove (83) align and are locked together.

[0073] When a tool is pushed into the tool groove (85) to separate the bolt (80) from the insertion part (22), the push pin (86) advances, and the blocking piece (84) moves to the lower side of the locking groove (83) to block and close the locking groove (83), and then the locking piece (24) is pushed out of the locking groove (83) and inserted into the insertion part (22). Afterwards, the bolt (80) can be rotated and separated.

[0075] FIG. 5 shows a third breaker (75) that secures the steel wire (10) for safety during maintenance work.

[0076] The third breaker (75) is installed around the tension roller (50) and is equipped with a pressure plate (76) that moves back and forth toward the tension roller (50). When the pressure plate (76) moves forward, it pushes the tension roller (50) to press and fix the steel wire (10). During maintenance, the operator ensures safety by pressing and fixing the steel wire (10) by moving the pressure plate (76) of the third breaker (75) forward through switch operation. The third breaker (75) can be driven by a magnetic method.

[0078] In describing the present invention above, a stage equipment lifting and lowering device having a specific shape and structure has been described with reference to the attached drawings; however, the present invention is capable of various modifications and changes by those skilled in the art, and such modifications and changes should be interpreted as falling within the scope of protection of the present invention. Explanation of the symbols

[0080] 10: Steel wire 20: Support plate 21 : Connecting bar 22 : Insertion part 23 : Fastening hole 24 : Locking piece 25 : 1st spring 30 : Winding drum 31 : Rotation axis 33 : Winding groove 40 : Support guide roller 50 : Tension roller 60 : Motor 70 : 2nd Breaker 75: 3rd Breaker 76: Pressure Plate 80 : Bolt 81 : Pin part 82 : Head 83 : Locking groove 84 : Block piece 85 : Tool slot 86 : Push pin 87 : Second spring

Claims

Claim 1 A stage equipment lifting and lowering device comprising: two support plates; an aluminum winding drum rotatably provided between the two support plates and having a plurality of winding grooves formed therein for winding steel wires; a support guide roller rotatably provided between the two support plates and matched to each of the winding grooves to support the steel wires and guide their movement; a pair of tension rollers rotatably provided between the two support plates to support the steel wires so that they pass in an S-shape and tension the steel wires tautly; and a motor for rotating the winding drum in forward and reverse directions, wherein the device further comprises a connecting bar connecting the two support plates and a bolt fastened to a fastening hole formed in an insertion part of the connecting bar that is inserted into an insertion hole of the support plate, wherein the device further comprises a locking piece provided in the insertion part to be able to be pulled in and out of the fastening hole, a first spring elastically supporting the locking piece to be pulled out into the fastening hole, a plurality of locking grooves formed in the pin part of the bolt and a tool groove formed in the head of the bolt for inserting a tool, and a A stage equipment lifting and lowering device further comprising a blocking piece, a push pin coupled to the blocking piece and configured to move back and forth toward the pin portion in the tool groove, and a second spring elastically supporting the push pin to move backward, wherein the locking piece is inserted into the locking groove to block the rotation of the bolt, and when the push pin moves forward, the blocking piece pushes the locking piece in the locking groove to enable the rotation of the bolt. Claim 2 A stage equipment lifting and lowering device according to claim 1, further comprising a chain member connecting the rotation axes of the pair of tension rollers so that they rotate in conjunction. Claim 3 A stage equipment lifting and lowering device according to claim 1, characterized in that the motor has a first breaker built in that is driven when the power supply is cut off, and the rotation axis of one of the pair of tension rollers is equipped with a second breaker that is driven when the power supply is cut off. Claim 4 delete

Images