Stage drive device with improved structural stability

Abstract

The present invention relates to a stage drive device that improves structural stability by enabling the installation of a device connected to a multi-channel wire rope even in a confined space, by being implemented in a form that includes a frame part to secure space efficiency and a drum part that rotates around a rotation axis extended to both sides on which a wire rope is wound, a main drum connected to a power part on which a rotation axis extended to one end of the drum part is connected, and at least one dependent drum driven by rotational force transmitted from the main drum.

Description

Technology Field

[0001] The present invention relates to a stage drive device, and more specifically, to a stage drive device comprising a drum that raises or lowers a stage device pole by winding or unwinding a wire rope. Background Technology

[0002] Generally, a stage set that moves up and down is provided on a stage such as a concert or play, and the stage set is installed on a stage pole called a batten. The batten and the fly system that raises and lowers the batten are collectively referred to as a stage set. At this time, the fly system of the stage set includes a stage drive device (2) for moving the stage pole (1) up and down, as shown in FIG. 1, and a wire rope (3) connecting the stage drive device (2) and the stage pole (1). At this time, the stage drive device (2) can adjust the stage pole (1) to move up and down by winding or unwinding the wire rope (3).

[0003] Korean Registered Patent Publication No. 10-1871245, Korean Registered Patent Publication No. 10-2146744, and Korean Registered Patent Publication No. 10-2785969 are disclosed as technologies related to the above stage drive device. Among these, Korean Registered Patent Publication No. 10-1871245 is characterized in that, as illustrated in FIG. 2, the stage drive device comprises a drive motor (4), a screw drum (5), a free-moving power transmission means (6), and an axial movement means (7), so that the screw drum is implemented in a movable form. The stage drive device in which the screw drum moves in this manner is configured so that when winding or pulling a wire rope, it moves by the pitch of the spiral groove formed on the outer surface of the screw drum, allowing it to be wound or unwound at a constant rate.

[0004] As described above, conventional stage drive systems are implemented with a structure in which multiple wire ropes are wound and unwound from a drum while spaced apart along the longitudinal direction. Consequently, conventional stage systems have a structural limitation in that their length increases as the number of wire ropes increases. This leads to the problem of the stage drive system occupying a large amount of space when constructing large stages. Furthermore, changing the number of installed wire ropes according to stage conditions requires replacing the stage drive system and its associated peripheral devices, resulting in excessive waste of cost and manpower. Prior art literature

[0005] (Patent Document 0001) US 8596616 B1 (Published Dec. 03, 2013)(Patent Document 0002) KR 10-1871245 B1 (Published June 27, 2018)(Patent Document 0003) KR 10-2146744 B1 (Published August 21, 2020)(Patent Document 0004) KR 10-2785969 B1 (Published March 25, 2025) The problem to be solved

[0006] The present invention has been devised to solve the problems of the prior art, and the objective of the present invention is to provide a stage drive device configured to distribute a load of the spline-screw type or to have multiple drums around which a wire rope is wound in order to ensure structural stability. means of solving the problem

[0007] A stage drive device (10) according to the present invention for achieving the above-mentioned purpose comprises a frame part (100) and a drum part (200) that rotates around a rotating shaft (230) that is wound on both sides and extends to both sides. The drum part (200) includes a main drum (210) in which a rotating shaft (230) extending to one side is connected to a power part (300), and at least one dependent drum (220) that is driven by rotational force transmitted from the main drum (210).

[0008] Additionally, the stage drive device (10) according to the present invention may further include a power transmission unit (500) connecting the rotation axis (230) of the main drum (210) and the rotation axis (230) of the dependent drum (220).

[0009] Additionally, the power transmission unit (500) includes a driving gear (510) installed on the rotation axis (230) of the main drum (210) and a driven gear (520) installed on the rotation axis (230) of the dependent drum (220), and the rotational force of the driving gear (510) can be transmitted to the driven gear (520).

[0010] In addition, the power transmission unit (500) may further include a transmission gear (530) interposed between the prime drive gear (510) and the driven gear (520).

[0011] Additionally, the transmission gear (530) can be detached to control the connection between the driving gear (510) and the driven gear (520) in the power transmission unit (500).

[0012] In addition, the power transmission unit (500) has the transmission gear (530) formed in an even number so that the driving gear (510) and the driven gear (520) can rotate in opposite directions.

[0013] Additionally, the main drum (210) can be implemented such that when it rotates in one direction, the wire rope (W) is wound and when it rotates in the other direction, the wire rope (W) is unwound, and the dependent drum (220) can be implemented such that when it rotates in one direction, the wire rope (W) is unwound and when it rotates in the other direction, the wire rope (W) is wound.

[0014] Additionally, the above-mentioned dependent drum (220) and driven gear (520) are formed in multiple numbers and spaced apart in the vertical or horizontal direction, and the transmission gear (530) may be positioned between the multiple driven gears (520).

[0015] In addition, when rotational force is transmitted from the prime drive gear (510) to the stage drive device (10) according to the present invention, some of the plurality of driven gears (520) may rotate in opposite directions.

[0016] Additionally, a plurality of dependent drums (220) may have some parts formed with different diameters.

[0017] Additionally, the stage drive device (10) according to the present invention further includes a pulley unit (400) positioned above or below the drum unit (200) to guide a wire rope (W) in the left and right directions, and the pulley unit (400) may include a plurality of switching pulleys (420) spaced apart in the left and right directions.

[0018] Additionally, the pulley unit (400) may have a plurality of switching pulleys (420) arranged in the forward and backward directions to guide the wire rope (W) wound on the main drum (210) and the dependent drum (220), respectively.

[0019] Additionally, the pulley unit (400) includes a first pulley unit (401) positioned on the lower side of the drum unit (200) and a second pulley unit (402) positioned on the upper side of the drum unit (200), and a wire rope (W) of the main drum (210) may be connected to one of the first pulley unit (401) and the second pulley unit (402), and a wire rope (W) of the dependent drum (220) may be connected to the other.

[0020] Additionally, the frame portion (100) includes a first side frame (120) and a second side frame (130) spaced apart on both sides, and the power transmission portion (500) can be coupled to either of the first side frame (120) and the second side frame (130).

[0021] Additionally, the power transmission unit (500) is installed on the first side frame (120), and a screw (240) may be installed on the second side frame (130) so that it moves in both directions when the main drum (210) and the dependent drum (220) rotate.

[0022] Additionally, the driving gear (510) and the driven gear (520) can each be coupled to either the first side frame (120) or the second side frame (130) by a bearing (B).

[0023] Additionally, the frame portion (100) may be formed as a pair of either the first side frame (120) and the second side frame (130) to allow a power transmission portion (500) to be interposed.

[0024] In addition, the stage drive device (10) according to the present invention for achieving the above-mentioned purpose comprises a frame part (100) and a drum part (200) that rotates around a rotating shaft (230) that is wound on both sides and extends to both sides. The drum part (200) comprises a main drum (210) in which a rotating shaft (230) extending to one side is connected to a power part (300), a spline (250) that connects the rotating shaft (230) and the main drum (210) and rotates together, a screw (240) that is screw-coupled to the other end of the main drum (210), and a connecting shaft (260) in which both ends are respectively coupled to the spline (250) and the screw (240). The connecting shaft (260) is positioned to penetrate the main drum (210).

[0025] Additionally, the connecting shaft (260) can be coupled with the screw (240) and bearing.

[0026] Additionally, the drum section (200) further includes a dependent drum (220) driven by rotational force transmitted from the main drum (210), and the spline (250), screw (240), and connecting shaft (260) may be disposed in at least one of the main drum (210) and the dependent drum (200).

[0027] In addition, the fly system according to the present invention may include the stage drive device (10) described above, a vertical pulley (30) that converts a wire rope (W) drawn out from the stage drive device (10) in a vertical direction, and a stage device pole (40) that moves up and down through the wire rope (W) converted from the vertical pulley (30). Effects of the invention

[0028] The stage drive device according to the present invention, configured as described above, has the advantage that multiple drums can be operated together based on power applied from a single power unit through a drum unit comprising a main drum and a dependent drum. This resolves the limitations of existing devices that require increased length to increase the number of wire rope channels, and at the same time, allows multiple wire ropes to be operated even in confined spaces, leading to the effect of being applicable to a wider variety of stages. Furthermore, the stage drive device according to the present invention maximizes space utilization through multiple drums spaced apart vertically or horizontally and pulley units arranged vertically.

[0029] Furthermore, the stage drive device according to the present invention utilizes a power transmission unit in which a transmission gear is interposed between a prime mover gear and a driven gear, thereby having the advantage of being able to operate various types of stages with a single device. In particular, since the stage drive device according to the present invention allows for operating only the main drum or varying the number of dependent drums by detaching the transmission gear, it leads to the effect of being able to more easily vary the number of channels without replacing the device. Moreover, the stage drive device according to the present invention allows a single device to be utilized for various purposes, as some of the multiple drums are configured with different diameters. Brief explanation of the drawing

[0030] Figure 1 is a drawing illustrating the fly system of a stage apparatus. FIG. 2 is a drawing illustrating a stage driving device according to the prior art. FIG. 3 is a perspective view of a stage driving device according to the first embodiment of the present invention. FIG. 4 is an exploded perspective view of a stage driving device according to the first embodiment of the present invention. FIG. 5 is a front view in which a portion of the driving unit and frame unit of a stage driving device according to the first embodiment of the present invention is obscured. FIG. 6 is a perspective view of the drum and pulley sections of a stage drive device according to the first embodiment of the present invention. FIG. 7 is a side view of the drum and pulley sections of a stage drive device according to the first embodiment of the present invention. FIG. 8 is a front view projected of the main drum and dependent drum of a stage drive device according to the first embodiment of the present invention. FIG. 9 is a front view projected of the main drum of a stage drive device according to a second embodiment of the present invention. Figures 10 and 11 are drawings showing the results of finite element analysis for a spline-screw type without a connecting rod installed. FIG. 12 is a drawing showing a modified example of a stage driving device according to the second embodiment of the present invention. FIG. 13 is a perspective view of a stage driving device according to a third embodiment of the present invention. FIG. 14 is an exploded perspective view of a stage driving device according to the third embodiment of the present invention. FIG. 15 is a perspective view of a stage driving device according to the fourth embodiment of the present invention. FIG. 16 is a perspective view of a stage driving device according to the fifth embodiment of the present invention. FIG. 17 is an exploded perspective view of a stage driving device according to the fifth embodiment of the present invention. FIG. 18 is a perspective view of a stage driving device according to the 6th embodiment of the present invention. FIG. 19 is a perspective view of a stage driving device according to the seventh embodiment of the present invention. FIG. 20 is a front view of a stage driving device according to the eighth embodiment of the present invention. FIG. 21 is a configuration diagram of a fly system according to the present invention. Specific details for implementing the invention

[0031] A stage driving device according to the present invention will be described in detail below with reference to the attached drawings. The drawings presented below are provided as examples to ensure that the concept of the present invention is sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms. In addition, throughout the specification, the same reference numerals indicate the same components.

[0032] Unless otherwise defined, technical and scientific terms used herein have the meanings commonly understood by those skilled in the art to which this invention pertains, and descriptions of known functions and configurations that could unnecessarily obscure the essence of the invention are omitted in the following description and accompanying drawings.

[0033] This specification clarifies the scope of the present invention and explains the principles of the present invention and discloses embodiments so that those skilled in the art can practice the present invention. The disclosed embodiments may be implemented in various forms and are not limited to the embodiments described herein.

[0034] Terms such as "comprising," "may compose," or "having," which may be used in various embodiments of the present invention, are intended to indicate the existence of the features described in the specification (e.g., functions, numbers, steps, actions, components, parts, or combinations thereof), and should be understood as not excluding in advance the existence or addition of one or more other features.

[0035] As used in this specification, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0036] When it is stated that a component is "connected or coupled" to another component, it should be understood that the component may be directly connected or coupled to the other component, but that a new component may also exist between the component and the other component. On the other hand, when it is stated that a component is "directly connected" or "directly coupled" to another component, it should be understood that no new component exists between the component and the other component.

[0037] The terms "first," "second," etc., as used in this specification may be used to describe various components, but the components should not be limited by these terms. The terms are used solely for the purpose of distinguishing one component from another.

[0038] <First Example>

[0039] FIGS. 3 to 8 relate to a stage drive device according to a first embodiment of the present invention, where FIG. 3 shows a perspective view of the stage drive device and FIG. 4 shows an exploded perspective view of the stage drive device. FIG. 5 shows a front view in which parts of the drive unit and frame unit of the stage drive device are not shown. FIG. 6 shows a perspective view of the drum unit and pulley unit of the stage drive device, and FIG. 7 shows a side view of the drum unit and pulley unit, respectively. FIG. 8 is a front view projected of the main drum and dependent drum of the stage drive device.

[0040] Referring to FIG. 3, the stage drive device (10) according to the present invention may include a frame part (100), a drum part (200), and a power part (300). At this time, the frame part (100) may be installed on a structure such as a grid iron, and the drum part (200) may be connected to the frame part (100) and controlled to wind or unwind a wire rope (W). The power part (300) may transmit power to the drum part (200) to rotate it.

[0041] The above frame portion (100) may include a fixedly installed base frame (110) and a first side frame (120) and a second side frame (130) fixed to the base frame (110) and spaced apart on both sides. In the following description, the two directions in which the first side frame (120) and the second side frame (130) are spaced apart are defined as the longitudinal direction and the left-right direction, and the lower ends of the first side frame (120) and the second side frame (130) are respectively fixed to the upper surface of the base frame (110).

[0042] The drum unit (200) may include a main drum (210) and a dependent drum (220). In this case, the main drum (210) and the dependent drum (220) may each have their longitudinal ends connected to the first side frame (120) and the second side frame (130) to rotate, and the main drum (210) and the dependent drum (220) may be spaced apart vertically and horizontally. The main drum (210) may rotate using power transmitted from the power unit (300), and the dependent drum (220) may rotate by receiving driving force from the main drum (210). Here, the power unit (300) may be implemented as an electric motor, for example, and may be configured to include additional components such as a reduction gear.

[0043] The stage drive device (10) according to the present invention may further include a pulley unit (400) that guides a wire rope (W) drawn up in the up-and-down direction from the drum unit (200) in the left-and-right direction. At this time, the pulley unit (400) can guide a wire rope (W) drawn up from the main drum (210) or the dependent drum (220).

[0044] Referring to FIGS. 4 and 5, the pulley unit (400) may include a fixed body (410) fixed to the frame unit (100) and a switching pulley (420) installed on the fixed body (410) to switch the direction of the wire rope (W). At this time, the switching pulley (420) may be made up of multiple units and spaced apart in the left and right directions, and multiple units may also be arranged in the front and back directions to guide the wire rope (W) drawn out from the main drum (210) and the dependent drum (220), respectively.

[0045] The stage drive device (10) according to the present invention may further include a power transmission unit (500) installed on the first side frame (120) or the second side frame (130). At this time, the power transmission unit (500) may be implemented in various forms such as gears or belts, and in the following description, power is transmitted using spur gears, etc., as an example.

[0046] The first side frame (120) may be formed as a pair and spaced apart in the left and right directions. The power transmission unit (500) may be positioned between the pair of first side frames (120). Here, the left and right ends of the power transmission unit (500) may be inserted into the pair of first side frames (120) and coupled so as to be rotatable.

[0047] The power transmission unit (500) may include a driving gear (510) installed at one end of the main drum (210) connected to the power unit (300), and a driven gear (520) that receives rotational force from the driving gear (510). At this time, the power transmission unit (500) may further include a transmission gear (530) interposed between the driving gear (510) and the driven gear (520). Here, depending on the number of the transmission gears (530), the rotational directions of the driving gear (510) and the driven gear (520) may be the same or opposite to each other. If the number of the transmission gears (530) is odd, the driving gear (510) and the driven gear (520) may rotate in the same direction, and if the number of the transmission gears (530) is even, the driving gear (510) and the driven gear (520) may rotate in opposite directions.

[0048] In the stage drive device (10) according to the present invention, the transmission gear (530) may be implemented in an even number so that the driving gear (510) and the driven gear (520) rotate in opposite directions, and the main drum (210) and the dependent drum (220) may be implemented to perform the same function in opposite rotation directions. More specifically, the main drum (210) may be controlled so that the wire rope (W) is wound when rotated in one direction and unwound when rotated in the other direction, and the dependent drum (220) may be controlled so that the wire rope (W) is unwound when rotated in one direction and the wire rope (W) is wound when rotated in the other direction.

[0049] The main drum (210) and the dependent drum (220) may each have a rotation axis (230) extended in the left and right directions. At this time, the driving gear (510) may be disposed on the rotation axis (230) of the main drum (210), and the driven gear (520) may be disposed on the rotation axis (230) of the dependent drum (220). Hereinafter, the rotation axis (230) of the main drum (210) is defined as the main axis (231), and the rotation axis (230) of the dependent drum (220) is defined as the driven axis (232) for explanation.

[0050] The main shaft (231) may be connected to one end of the main drum (210), and the driven shaft (232) may be connected to one end of the dependent drum (220). Additionally, a screw (240) may be disposed at the other end of the main drum (210) and / or the other end of the dependent drum (220). Here, one end of the screw (240) may be inserted into the main drum (210) or the dependent drum (220) and screw-coupled, while the other end may be fixed to the second side frame (130). Accordingly, the drum section (200) may be implemented in a form that allows the main drum (210) or the dependent drum (220) to rotate and move in the left and right directions.

[0051] Referring to FIGS. 6 and 7, a plurality of wire ropes (W) can be wound on the main drum (210) in a spaced-apart manner in the left-right direction. A plurality of wire ropes (W) can also be wound on the dependent drum (220) in a spaced-apart manner in the left-right direction. Here, the wire rope (W) can be drawn out from the front to the bottom of the main drum (210), and the wire rope (W) can be drawn out from the rear to the bottom of the dependent drum (220). Hereinafter, the wire rope (W) wound on the main drum (210) is defined as the first wire (W1), and the wire rope (W) wound on the dependent drum (220) is defined as the second wire (W2).

[0052] The above-described pulley unit (400) may have a pair of switching pulleys (420) arranged along the front and rear directions to guide the first wire (W1) and the second wire (W2), respectively. At this time, the pair of switching pulleys (420) may be divided into a first pulley (421) that guides the first wire (W1) and a second pulley (422) that guides the second wire (W2). Here, the hinge angle of the first wire (W1) fed into the first pulley (421) from the main drum (210) and the hinge angle of the second wire (W2) fed into the second pulley (422) from the dependent drum (220) may be different from each other. And the pulley unit (400) may further include a hinge shaft (430) that adjusts the hinge angle of the switching pulley (420), and a rotating bracket (440) with one end connected to the hinge shaft (430) and the other end connected to the switching pulley (420).

[0053] Referring to FIG. 8, the main drum (210) and the dependent drum (220) may have the rotation axis (230) connected to one end and the screw (240) connected to the other end. Accordingly, the main drum (210) and the dependent drum (220) may rotate around the one end axis and move in both directions through the threads of the screw (240). Here, the drum portion (200) may further include a spline (250) connected to one end of the main drum (210) or the dependent drum (220) and rotated together with the rotation axis (230).

[0054] The above spline (250) may be composed of a plurality of parts and each may be connected to the main drum (210) or at least one dependent drum (220). In this case, the spline (250) may be implemented as a power transmission body connected between the rotation axis (230) and the main drum (210) or the dependent drum (220).

[0055] As described above, the drum section (200) can be installed in various known forms, such as being implemented as a spline-screw type to be variable, or having the rotation axis (230) pass through the main drum (210) or dependent drum (220) to rotate in place.

[0056] <Second Embodiment>

[0057] FIGS. 9 to 12 relate to a stage drive device according to a second embodiment of the present invention, FIG. 9 is a projected front view of the main drum of the stage drive device, FIGS. 10 and 11 are drawings showing the results of finite element analysis for a spline-screw type without a connecting rod installed, and FIG. 12 is a modified example of the stage drive device.

[0058] Referring to FIG. 9, the auxiliary drive device (10) according to the present invention may include a frame part (100), a drum part (200), a power part (300), and a power transmission part (500). The frame part (100) may include a base frame (110), a first side frame (120), and a second side frame (130), and the drum part (200) may include a main drum (210) and a dependent drum (220). In addition, the power transmission part (500) may be positioned between a main shaft (231) that rotates the main drum (210) and a driven shaft (232) connected to the dependent drum (220) to transmit power. Although not illustrated, the stage drive device (10) according to the present invention may further include a pulley part (400).

[0059] The drum section (200) may be configured as a spline-screw type, and a spline (250) may be disposed at one end of the main drum (210) or dependent drum (220) and a screw (240) may be disposed at the other end. Here, the drum section (200) may further include a connecting shaft (260) whose ends are coupled to the spline (250) and the screw (240).

[0060] One end of the connecting shaft (260) may be fixedly coupled to the spline (250) to rotate together, and the other end may be inserted into the hollow of the screw (240) and bearing coupled. At this time, the connecting shaft (260) may be placed on the main drum (210) or the dependent drum (220). Here, the connecting shaft (260) may be composed of multiple units and may be placed on the main drum (210) and at least one dependent drum (220), or on two or more dependent drums (220). Alternatively, the connecting shaft (260) may be composed of a single unit and placed to penetrate the main drum (210) or the dependent drum (220).

[0061] Referring to FIGS. 10 and 11, the movable drum section (200) of the spline-screw type, in which the connecting shaft (260) is not installed, may experience a problem where the self-weight and load are concentrated due to the weight of the main drum (210) or the dependent drum (220). In particular, since the shaft of the spline (250) and the shaft of the screw (240) are cantilevered beams with load forms fixed to the first side frame (120) and the second side frame (130), respectively, there is a disadvantage that as the weight of the main drum (210) or the dependent drum (220) increases, a lot of deformation occurs, and structural stability is reduced.

[0062] The present invention is intended to solve the above-mentioned problem and has the advantage of further improving structural stability by including a connecting shaft (260) that connects the spline (250) and the screw (240) in a movable drum section (200) of the spline-screw type. In particular, when the present invention is applied to a form in which the main drum (210) or the dependent drum (220) is extended in the longitudinal direction to increase the number of channels, the effect is further enhanced through load distribution via the connecting shaft (260).

[0063] Referring to FIG. 12, the connecting shaft (260) of the present invention has the advantage of being usable not only in a drum section (200) having multiple drums, but also in a drum section (200) having a single drum. In particular, as described above, the present invention can improve performance by being implemented to have multiple drums or by distributing the load through a connecting shaft (260) that penetrates a single drum, in order to secure structural stability in a situation where the drum section (200) must have multiple channels.

[0064] <Third Embodiment>

[0065] FIGS. 13 and FIGS. 14 relate to a stage driving device according to a third embodiment of the present invention, where FIG. 13 shows a perspective view of the stage driving device and FIG. 14 shows an exploded perspective view of the stage driving device.

[0066] Referring to FIGS. 13 and 14, the stage drive device (10) according to the present invention may include a frame part (100), a drum part (200), a power part (300), a pulley part (400), and a power transmission part (500). The frame part (100) may include a base frame (110), a first side frame (120), and a second side frame (130), and the drum part (200) may include a main drum (210) and a dependent drum (220). In addition, the power transmission part (500) may include a driving gear (510) linked to the main drum (210) and a driven gear (520) linked to the dependent drum (220), and may further include a transmission gear (530) interposed between the driving gear (510) and the driven gear (520).

[0067] In the stage drive device (10) according to the present invention, the dependent drum (220) and the driven gear (520) may each be implemented in multiple numbers. Here, the main drum (210) and the multiple dependent drums (220) may be spaced apart from each other in the up-down or front-back direction, and may also be spaced apart in a diagonal direction in the up-down front-back plane.

[0068] In the stage drive device (10) according to the present invention, the transmission gear (530) may be arranged to be interposed between a plurality of driven gears (520). At this time, some of the plurality of driven gears (520) may be implemented to rotate in opposite directions. Accordingly, some of the prime drive gear (510) and the plurality of driven gears (520) may rotate in the same direction and others may rotate in opposite directions. Also, some of the main drum (210) and the plurality of dependent drums (220) may rotate in the same direction and others may rotate in opposite directions. Furthermore, the drum section (200) may be installed so that the wire rope (W) extends downward from the front or rear side depending on the direction of rotation.

[0069] A guide pulley (600) for guiding a wire rope (W) in the left and right directions may be installed on the first side frame (120) or the second side frame (130). In this case, the guide pulley (600) may be in the form of a multi-pulley, and a wire rope (W) drawn out from the pulley section (400) may be inserted between them.

[0070] <Fourth Example>

[0071] FIG. 15 relates to a stage driving device according to a fourth embodiment of the present invention, and FIG. 15 shows a perspective view of the stage driving device.

[0072] Referring to FIG. 15, the stage drive device (10) according to the present invention may include a frame part (100), a drum part (200), a power part (300), a pulley part (400), and a power transmission part (500). The frame part (100) may include a base frame (110), a first side frame (120), and a second side frame (130), and the drum part (200) may include a main drum (210) and a dependent drum (220). In addition, the dependent drum (220) may be made up of multiple units so that when the main drum (210) rotates, they can rotate together through the power transmission part (500). Here, the stage drive device (10) according to the present invention may utilize a main drum (210) and a dependent drum (220) having various diameters. For example, a drum with a diameter of 318 mm or a drum with a diameter of 216 mm may be installed.

[0073] <5th Example>

[0074] FIGS. 16 and FIGS. 17 relate to a stage driving device according to a fifth embodiment of the present invention, where FIG. 16 shows a perspective view of the stage driving device and FIG. 17 shows an exploded perspective view of the stage driving device.

[0075] Referring to FIGS. 16 and 17, the stage drive device (10) according to the present invention may include a frame part (100), a drum part (200), a power part (300), a pulley part (400), and a power transmission part (500). The frame part (100) may include a base frame (110), a first side frame (120), and a second side frame (130), and the drum part (200) may include a main drum (210) and a dependent drum (220).

[0076] The power transmission unit (500) may be installed on the second side frame (130). At this time, the second side frame (130) may be configured as a pair and spaced apart in the left and right directions, and the power transmission unit (500) may be installed between them. Here, the power transmission unit (500) may include a driving gear (510) connected to the main drum (210), a driven gear (520) connected to the dependent drum (220), and a transmission gear (530) interposed between the driving gear (510) and the driven gear (520). Furthermore, the left and right ends of the driving gear (510), the driven gear (520), and the transmission gear (530) may be connected to the pair of second side frames (130) by bearings (B).

[0077] <6th Example>

[0078] FIG. 18 relates to a stage driving device according to the 6th embodiment of the present invention, and FIG. 18 shows a perspective view of the stage driving device.

[0079] Referring to FIG. 18, the stage drive device (10) according to the present invention may include a frame part (100), a drum part (200), a power part (300), a pulley part (400), and a power transmission part (500). The frame part (100) may include a base frame (110), a first side frame (120), and a second side frame (130), and the drum part (200) may include a main drum (210) and a dependent drum (220).

[0080] The above dependent drums (220) may be implemented as at least one, and may be implemented as two or more depending on the installation environment. In the illustrated drawing, as an example, four dependent drums (220) are shown connected to one main drum (210). And some of the multiple dependent drums (220) may be rotated in the same direction as the main drum (210), and some of the others may be rotated in the opposite direction to the main drum (210).

[0081] The pulley unit (400) may be positioned on the lower or upper side of the drum unit (200) to guide the wire rope (W) in the left and right directions. At this time, the pulley unit (400) may include a first pulley unit (401) positioned on the lower side of the drum unit (200) and a second pulley unit (402) positioned on the upper side of the drum unit (200). Here, the wire rope (W) of the main drum (210) may be connected to one of the first pulley unit (401) and the second pulley unit (402), and the wire rope (W) of the dependent drum (220) may be connected to the other. Additionally, among the plurality of dependent drums (220), some may have their wire ropes (W) connected to the first pulley unit (401), and others may have their wire ropes (W) connected to the second pulley unit (402). More preferably, a plurality of dependent drums (220) can be implemented in a form where some are located relatively lower and others are located relatively upper.

[0082] The first pulley section (401) and the second pulley section (402) may each include a fixed body (410) and a switching pulley (420). Additionally, the fixed bodies (410) of the first pulley section (401) and the second pulley section (402) may be installed to be fixed to a structure such as a grid iron or to the frame section (100).

[0083] <7th Embodiment>

[0084] FIG. 19 relates to a stage driving device according to the seventh embodiment of the present invention, and FIG. 19 shows a perspective view of the stage driving device.

[0085] Referring to FIG. 19, the stage drive device (10) according to the present invention may include a frame part (100), a drum part (200), a power part (300), a pulley part (400), and a power transmission part (500). The frame part (100) may include a base frame (110), a first side frame (120), and a second side frame (130), and the drum part (200) may include a main drum (210) and a dependent drum (220).

[0086] The above dependent drums (220) may be implemented as at least one, and may be implemented as two or more depending on the installation environment. In the illustrated drawing, as an example, four dependent drums (220) are shown connected to one main drum (210). And some of the multiple dependent drums (220) may be rotated in the same direction as the main drum (210), and some of the others may be rotated in the opposite direction to the main drum (210).

[0087] Some of the main drum (210) and the plurality of dependent drums (220) may be implemented with different diameters. For example, the diameter of at least one dependent drum (220) located at the top among the plurality of dependent drums (220) may be formed to be relatively large. In addition, the pulley unit (400) may include a first pulley unit (401) and a second pulley unit (402), and at least one dependent drum (220) located at the top may be connected to the second pulley unit (402). Accordingly, the stage drive device (10) according to the present invention may be driven to perform lifting operations for other heavy objects (20) as well as lifting stage equipment poles, and may be implemented to handle a wider variety of functions with a single power unit (300). Of course, the present invention can be modified in various forms, such as having multiple power units (300) arranged or multiple main drums (210) directly connected to a single power unit (300).

[0088] The power transmission unit (500) may be implemented to synchronize the rotational speeds of a main drum (210) and a plurality of dependent drums (220) of a drum unit (200) having different diameters. At this time, for synchronization, the power transmission unit (500) may be implemented such that some of the driving gear (510), driven gear (520), and transmission gear (530) of the power transmission unit (500) have different gear ratios.

[0089] <Episode 8>

[0090] FIG. 20 relates to a stage driving device according to the eighth embodiment of the present invention, and FIG. 20 shows a front view of the stage driving device.

[0091] Referring to FIG. 20, the stage drive device (10) according to the present invention may include a frame part (100), a drum part (200), a power part (300), a pulley part (400), and a power transmission part (500). The frame part (100) may include a base frame (110), a first side frame (120), and a second side frame (130), and the drum part (200) may include a main drum (210) and a dependent drum (220).

[0092] The drum section (200) comprises a main drum (210) and at least one dependent drum (220) synchronized with each other through the power transmission section (500), and some of these may be formed with different lengths. For example, the first left-right length (L1) of the main drum (210) and the second left-right length (L2) of the dependent drum (220) may be implemented to be different from each other, or some of the multiple dependent drums (220) may be implemented to have different left-right lengths. In addition, the drum section (200) may have the main drum (210) and at least one dependent drum (220) driven in the same form or in different forms, and for example, some may be implemented to rotate in place while others may be implemented to move left and right through a screw.

[0093] FIG. 21 relates to a fly system according to the present invention, and FIG. 21 shows a configuration diagram of the fly system.

[0094] Referring to FIG. 21, the fly system according to the present invention may be configured to include a stage drive device (10) of any one of the first to eighth embodiments described above. The fly system according to the present invention may further include a vertical pulley (30) that vertically guides a wire rope (W) that is unwound or wound from the stage drive device (10), and a stage device pole (40) that moves up and down through the wire rope (W) guided by the vertical pulley (30).

[0095] The background technology of the present invention described above is technical information possessed for the derivation of the present invention or acquired during the process of deriving the present invention, and cannot necessarily be regarded as known technology disclosed to the general public prior to the filing of the present invention.

[0096] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not intended to be limiting.

[0097] For example, the present invention has been described with reference to embodiments illustrated in the drawings, but this is merely illustrative and those skilled in the art will understand that various modifications and variations of embodiments are possible therefrom.

[0098] Accordingly, the true technical scope of protection of the present invention is defined by the technical concept of the claims, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0099] 10 : Stage drive unit 20 : Heavy object 30 : Vertical pulley 40 : Stage pole 100 : Frame part 110 : Base frame 120 : 1st side frame 130 : 2nd side frame 200 : Drum section 210 : Main Drum 220 : Dependent drum 230 : Rotation axis 231 : Main axis 232 : Driven shaft 240 : Screw 250 : Spline 260 : Connecting axis 300 : Power unit 400 : Pulley part 401: 1st pulley section 402 : Second pulley section 410 : Fixed body 420 : Switching pulley 421 : 1st pulley 422 : 2nd pulley 430 : Hinge axis 440 : Rotating bracket 500 : Power transmission unit 510 : Prime gear 520 : Driven gear 530 : Transmission gear 600 : Guide pulley 700 : Vertical pulley B: Bearing W : Wire rope W1: First wire W2 : Second wire

Claims

Claim 1 A stage drive device comprising: a frame portion; a drum portion that rotates around a rotation axis extending to the left and right sides on which a wire rope is wound; and a pulley portion disposed on the upper or lower side of the drum portion to guide the wire rope in the left and right directions; wherein the drum portion comprises: a main drum connected to a power unit with a rotation axis extending to one side to the left and right; and at least one dependent drum driven by rotational force transmitted from the main drum; wherein the main drum and the dependent drum are spaced apart in the vertical direction and the main drum and the dependent drum rotate in opposite directions to each other; and wherein the pulley portion comprises a plurality of switching pulleys disposed in the front and rear directions, wherein the wire rope is drawn out from the front to the lower side of the main drum and guided by one switching pulley, and the wire rope is drawn out from the rear to the lower side of at least one dependent drum and guided by another switching pulley. Claim 2 A stage drive device according to claim 1, further comprising a power transmission unit connecting the rotation axis of the main drum and the rotation axis of the dependent drum. Claim 3 A stage drive device according to paragraph 2, wherein the power transmission unit comprises: a driving gear installed on the rotation axis of the main drum; and a driven gear installed on the rotation axis of the dependent drum; and wherein the rotational force of the driving gear is transmitted to the driven gear. Claim 4 A stage drive device characterized in that, in paragraph 3, the power transmission unit further includes a transmission gear interposed between the prime mover gear and the driven gear. Claim 5 In paragraph 4, the power transmission unit is characterized by the transmission gear being detachable to control the connection between the prime mover gear and the driven gear. Claim 6 In paragraph 4, the power transmission unit is characterized in that the interposed transmission gears are formed in an even number, and the driving gear and the driven gear rotate in opposite directions. Claim 7 A stage drive device according to claim 6, characterized in that the main drum winds the wire rope when rotated in one direction and unwinds the wire rope when rotated in the other direction, and the dependent drum unwinds the wire rope when rotated in one direction and winds the wire rope when rotated in the other direction. Claim 8 A stage drive device according to claim 4, characterized in that the dependent drum and the driven gear are formed in multiple numbers and spaced apart in the vertical or horizontal direction, and the transmission gear is positioned between the multiple driven gears. Claim 9 A stage drive device according to claim 8, characterized in that when rotational force is transmitted from the prime drive gear, some of the plurality of driven gears rotate in opposite directions. Claim 10 A stage drive device according to claim 8, characterized in that a plurality of dependent drums are formed with parts having different diameters. Claim 11 delete Claim 12 delete Claim 13 A stage drive device according to claim 1, wherein the pulley unit comprises: a first pulley unit disposed on the lower side of the drum unit; and a second pulley unit disposed on the upper side of the drum unit; wherein a wire rope of the main drum is connected to one of the first pulley unit and a wire rope of the dependent drum is connected to the other. Claim 14 A stage drive device according to paragraph 3, wherein the frame portion comprises a first side frame spaced apart on both sides and a second side frame, and the power transmission portion is coupled to either the first side frame or the second side frame. Claim 15 A stage drive device according to claim 14, wherein the power transmission unit is installed on the first side frame, and a screw is installed on the second side frame so as to move in both directions when the main drum and dependent drum rotate. Claim 16 A stage drive device according to claim 14, wherein the driving gear and the driven gear are each bearing-coupled to either the first side frame or the second side frame. Claim 17 A stage drive device according to claim 14, wherein the frame portion is characterized in that either the first side frame or the second side frame is formed as a pair and a power transmission portion is interposed therein. Claim 18 delete Claim 19 delete Claim 20 delete Claim 21 A fly system comprising: a stage drive device according to any one of claims 1 to 10 and claims 13 to 17; a vertical pulley that converts a wire rope drawn from the stage drive device into a vertical direction; and a stage device pole that moves up and down through the wire rope converted by the vertical pulley.

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