KR100950436B1 - Safety and guide apparatus of wire rope for stage setting - Google Patents

Abstract

PURPOSE: A safety device of a wire rope for a stage instrument and a guiding apparatus are provided to prevent the breakaway of the wire rope from a guide wheel and to prevent an accident including falling of subsidiary facilities when an input electronic brake is broken. CONSTITUTION: A guiding apparatus of a wire rope for a stage instrument comprises: a grid iron which is installed in ceiling and in which a plurality of pulleies are installed on the upper side of the grid iron; a guide pulley having a plurality of rotating guide wheels; an installation frame in which a stage spotlight and a film are connected; a driving part which offers a power to the installation frame; a screw drum fixing frame(50) which is included in the driving part and fixes the screw drum; and a guidance induction frame(60) which guides the wire rope to be placed in a spiral groove of the screw drum.

Description

Safety and guide apparatus of wire rope for stage setting

The present invention relates to a safety device and a guidance guide device for a stage machine wire rope. Double safety to guide the wire rope wound and recommended to the winding drum more safely and to install the safety device to selectively control the rotation of the winding drum to prevent the fall of the stage facility due to the malfunction of the equipment. It relates to a safety device and a guidance guide device for a stage rope provided with a device.

In general, a variety of devices are installed on the stage, such as lighting fixtures that illuminate the stage, effect mechanisms that produce the necessary effects for the performance, and film lifting mechanisms that variably occupy the stage with the audience.

These devices are usually mounted on lifting stages and installed to move up and down as a reason for management, maintenance and performance.

However, there is a problem in that many people accidents are caused by the stage facility falls to the stage during the ascending or descending operation of the stage facility that is actually heavy. This is because the installation frame falls down without any restrictions because the safety device is not provided for controlling the winding and the winding operation of the wire rope in the winding drum when the drive motor is overloaded and malfunctions.

In addition, there was a problem in that the wire rope is wound on the winding drum, causing the malfunction of the stage facility due to the deviation from the guide wheel, which is the guide wheel in the process of winding a plurality of wire ropes concentrated by the guide wheel on the winding drum. Was only rotating in the same position, but the wire rope wound on the winding drum moved along the spiral direction and the wire rope was bent in an oblique direction.

In order to solve these problems, the present applicant has been provided with a safety device for a stage facility for controlling the winding operation and the winding operation of the wire rope in the winding drum which is installed on one side of the driving unit and has an insertion groove when the driving motor is overloaded. , The safety device for the stage facility is fixed to the ground adjacent to the driving unit, a base plate having a plurality of fastening holes formed on the upper surface, and is installed on the upper portion of the base plate to control the rotation of the winding drum, A locking plate having a coupling hole in which a bolt is coupled to communicate with the coupling hole, and a locking device having a rod inserted into an insertion groove of the winding drum by linear movement in a horizontal direction when an external power source is applied to an upper portion of the coupling plate; Is installed in the drive motor, generates a signal when the overload occurs in the drive motor Key is connected between the sensor and the locking device and a locking device for the stage facility comprising a control unit for controlling the operation of the locking device when the signal is transmitted from the sensor "Patent No. 10-0825670 It has been patented.

However, such a safety device for a stage facility has a flashing light or a performance product fixed on an installation frame as the wire rope wound around the winding drum swings and shakes momentarily when the locking drum stops. There was a problem that a safety accident occurs due to falling.

In addition, the sensing sensor by the drive motor is not smoothly sensed, there is a problem in the operation is slow operation because the insertion groove of the guiding drum in which the rod of the locking device is rotated is not easily inserted.

In addition, in the process of winding or recommending the wire rope on the winding drum, the wire rope is separated from the guide wheel, causing a malfunction of the stage facility.

The present invention is to solve the above problems, by mounting the wire rope guide guide device to the linear guide rail to maintain a constant tension by the wire guide guide device guide wire rope from the fear of departure from the guide wheel At the same time, the guide induction device guides the wire rope to the screw drum smoothly while actively adjusting the running speed and the stroke distance of the wire rope, thereby preventing the wire rope from falling off, and the input side and the output side of the screw drum. Safety device and guide guidance device for stage machine wire rope which can prevent the safety accidents such as falling of auxiliary facilities by double output power brake in case of failure of input side electromagnetic brake by installing input side electromagnetic brake and output side electromagnetic brake respectively. The purpose is to provide.

In order to achieve the above object, the guide guide device of the wire rope for the stage machine of the present invention is fixed to the ceiling, a plurality of grid irons having a guide sprocket installed on the upper surface, and installed on top of the grid iron A guide pulley having a plurality of guide wheels hinged and rotated by a wire rope connected through a guide sprocket and a guide wheel under the grid iron, and an installation frame connected with a stage lighting device and a membrane; Stage provided with a drive motor installed on the ground to provide the power required for the lifting movement of the installation frame and generating a rotational force, and a drive unit formed by a winding drum connected to the drive motor and the reducer to rotate and wind or recommend the wire rope. In a facility apparatus;

The winding drum is formed of a screw drum with continuous spiral grooves formed on the outer circumference;

The left and right support plates each have a bottom plate fixed to the fixed bottom by bolts and nuts, and a vertical plate vertically erected from the bottom plate and having a vertical plate where the support shafts at both ends of the screw drum are inserted in the center thereof to be pivotally supported. Four frame fixing bars horizontally formed on the upper front, rear, and lower front and rear sides of the vertical bar of the right and left support plates, respectively, are horizontally formed so that the left and right support plates are firmly fastened as nuts are fastened by nuts. A screw drum fixing frame firmly fixed on the left and right sides;

The guide rail fixing bar is horizontally formed between the left and right support plates of the screw drum fixing frame, and both ends are fixedly coupled to the inner side of the vertical plate of the left and right support plates, and the end surface of the screw drum of the guide rail fixing bar is H-shaped. The linear guide rails having upper and lower rail grooves are formed at the center of the upper and lower end surfaces and are fixed horizontally on the side. The front surface is a rectangular parallelepiped having rail inserting grooves formed inward to correspond to the linear guide rails, In the upper and lower rail grooves, a plurality of rail moving bars having upper and lower rail protrusions which are fixed to be slidably moved in a horizontal direction are formed, and a flat cross section is formed on the rear surface of the rail moving bar in a c-shape and the opening is fixed to the rear side. The rail support plate is installed is formed, is located to stand up between the rail support plate A guide rail having a wire guide groove that is axially coupled to the rail support plate by a rotating shaft and wound around the spiral groove of the screw drum and wraps the wire rope positioned vertically upwards is formed so that the wire rope is wound around the spiral groove of the screw drum. It is characterized by having a guide guide frame for guiding the wire rope to be positioned in the spiral groove of the screw drum while slidingly moving along the spiral groove in left and right directions.

In addition, the safety device of the wire rope for the stage machine of the present invention is fixed to the ceiling, the grid iron is provided with a plurality of pulleys having a guide sprocket on the upper surface, and a plurality of guides installed on the grid iron hinge hinged A guide pulley having a wheel, and an installation frame mounted to be movable up and down by a wire rope connected through a guide sprocket and a guide wheel under the grid iron, and an installation frame connected to a stage lighting device and a membrane; An apparatus for stage installation, comprising: a driving motor installed on the ground to provide power and generating a rotational force; and a driving unit formed by a winding drum connected to the driving motor and a reduction gear to rotate and wind or recommend a wire rope;

The winding drum is formed of a screw drum with continuous spiral grooves formed on the outer circumference;

The left and right support plates each have a bottom plate fixed to the fixed bottom by bolts and nuts, and a vertical plate vertically erected from the bottom plate and having a vertical plate where the support shafts at both ends of the screw drum are inserted in the center thereof to be pivotally supported. Four frame fixing bars horizontally formed on the upper front, rear, and lower front and rear sides of the vertical bar of the right and left support plates, respectively, are horizontally formed so that the left and right support plates are firmly fastened as nuts are fastened by nuts. A screw drum fixing frame firmly fixed on the left and right sides;

Support shafts protrude from the left and right centers of the screw drum, respectively, and one drive shaft of the screw drum is axially coupled to the drive motor through a reducer fixed to the left support plate to enable power transmission, and the drive motor is an electromagnetic brake on the input side. Is coupled to stop the rotation of the screw drum only when the drive motor is stopped, the screw drum is rotated when the drive motor is operating, and the output side electromagnetic brake fixed to the right support plate is coupled to the other support shaft of the screw drum and the input electron When the brake is broken, the screw drum is stopped only when the drive motor is stopped. When the drive motor is running, the screw drum is rotated and the operation of the screw drum is doubled to prevent safety accidents such as falling of the stage facilities. There is a characteristic.

As described above, the present invention has an effect of essentially preventing the wire rope from being detached from the guide wheel by mounting the wire rope guide guide device to the linear guide rail so that the wire rope maintains a constant tension by the guide guide device.

In addition, the wire rope guide induction device is actively adjusted according to the running speed and the stroke distance of the wire rope, thereby inducing the wire rope to be smoothly wound on the spiral groove of the screw drum, thereby preventing the wire rope from being repeatedly wound or separated from the screw drum. There is an effect to prevent.

In addition, by installing the input side electromagnetic brake and the output side electromagnetic brake on the input side and the output side of the screw drum, there is an effect that can prevent the safety accidents such as the fall of auxiliary facilities by the output side electromagnetic brake in case of failure of the input side electromagnetic brake.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Of course, such changes will fall within the scope of the claims.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is an enlarged perspective view showing a main portion of the safety device and the guide guide device of the wire rope for the stage machine according to the embodiment of the present invention, Figure 2 is a view of the safety device and guide guide device of the wire rope for the stage machine according to the embodiment of the present invention 3 is a plan view showing a safety device and a guide guide device of the wire rope for a stage machine according to an embodiment of the present invention, Figure 4 is a safety device and guide guide device of a wire rope for a stage machine according to an embodiment of the present invention Figure 5 is a right side view showing a state, Figure 5 is an excerpt side view showing the operation of the safety device and guide guide device of the stage machine wire rope according to an embodiment of the present invention, Figure 6 is a safety of the stage machine wire rope according to an embodiment of the present invention A front view of the main parts extract showing the operation of the device and the guidance guide device, Figure 7 is a safety device and guidance of the wire rope for the stage machine according to the embodiment of the present invention A main portion enlarged sectional view showing the appearance of the input-side electronic brake values seal 8 is an enlarged sectional view showing a state of the output side of the electromagnetic brake and the safety guide induction device of the present invention embodiment for stage machine wire rope.

For reference, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof is omitted.

In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator.

Therefore, the definition should be made based on the contents throughout the specification.

The guide guide device for a wire rope for a stage machine according to the present invention includes a grid iron (10) provided with a plurality of pulleys (12) having a guide sprocket (11) mounted on and fixed to a ceiling (W), and the grid iron ( A guide pulley 20 having a plurality of guide wheels 21 hinge-rotated and installed at an upper portion thereof, and connected to a guide sprocket 11 and a guide wheel 21 under the grid iron 10. It is installed to move up and down by a wire rope (L) is installed on the installation frame 30, the stage lighting device and the membrane is connected, and is installed on the ground to provide the power required for the lifting movement of the installation frame 30 to generate a rotational force A screw drum 51 in which a spiral groove 51a is continuously formed on the outer circumference of the wire rope L while being wound and connected by being rotated by being connected to the driving motor 41, the driving motor 41, and the reduction gear 42. Drive unit 40 formed of Screw drum fixing frame (50) having left and right support plates (56, 57) for fixing the crew drum (51) to the fixed bottom (90) so as to be pivotally rotatable; It is installed as is composed of a guide induction frame 60 for maintaining the elasticity of the wire rope (L) while at the same time inducing the wire rope (L) in the spiral groove (51a) of the screw drum (51).

The screw drum fixing frame 50 has bottom plates 56a and 57a fastened and fastened to the fixed bottom 90 by bolts and nuts. The screw drum 51 is vertically erected at the bottom plates 56a and 57a. ) The left and right support plates 56 and 57 having vertical plates 56b and 57b on which the support shafts 51b and 51c at both ends are inserted and pivotally supported, respectively, are formed, and the left and right support plates are long bars. (56,57) Four frames positioned on the upper, front and rear sides and the lower front and rear sides of the vertical plates 56b and 57b, respectively, to firmly fasten the left and right support plates 56 and 57 as both ends are fastened by nuts. Fixing bars 58, 58a, 58b and 58c are horizontally formed, respectively, to firmly fix the screw drum 51 on the left and right sides.

The guide guide frame (60) is located between the left and right support plates (56, 57) of the screw drum fixing frame (50) in front of the upper side of the vertical plates (56b, 57b) of the left and right support plates (56, 57) Guide rail fixing bar (65) fixedly coupled to each other is formed horizontally, the side cross-section is H-shaped horizontally fixed to the screw drum 51 side of the guide rail fixing bar 65 in the upper and lower sections, respectively, the upper and lower rails Linear guide rails 64 having grooves 64a and 64b are formed, and the front surface is a rectangular parallelepiped having rail insertion grooves 63a recessed inwardly corresponding to the linear guide rails 64, and a rail insertion groove ( 63a) a plurality of rail moving bars 63 having upper and lower rail protrusions 63b and 63c fixed to the upper and lower rail grooves 64a and 64b so as to be slidably moved in the horizontal direction, respectively, and a rail moving bar 63) On the rear side, the flat section is in the shape of c, and the opening is on the rear side. A rail support plate 62 is formed to be fixed in a fixed state. The rail support plate 62 is erected between the rail support plates 62 and axially coupled to the rail support plate 62 by a pivot shaft 61b. A guide rail 61 having a wire guide groove 61a wound around the wire rope L and wound vertically on the front side 51a is formed so that the wire rope L is the spiral groove of the screw drum 51. The wire rope L is guided so that the wire rope L is positioned in the spiral groove 51a of the screw drum 51 while slidingly moving in the left and right directions along the spiral groove 51a when wound or wound on the 51a.

The guidance guide device of the present invention is driven by the operation of the drive unit 40, the driving motor 41, when the wire rope L is held in the screw drum 51, seated in the spiral groove 51a of the screw drum 51 In a state in which the wire rope (L) is vertically extended to the upper guide guide in the wire guide groove (61a) of the guide rail 61, at this time, the wire rope (L) side is in close contact with the guide rail 61 When the lower end of the wire rope (L) is gradually wound to the right along the spiral groove (51a) of the screw drum (51) while being wound around the screw drum (51), the guide rail (51) accordingly according to the rail support plate (62) The upper and lower rail protrusions 63b and 63c of the rail moving bar 63 coupled to the upper and lower rail grooves 64a and 64b of the linear guide rail 64 fixedly coupled to the guide rail fixing bar 65, respectively. By sliding in the horizontal direction the wire rope (L) smoothly along the spiral groove (51a) of the screw drum (51) It is guided to be tinted. Accordingly, while actively adjusting according to the running speed and the stroke distance of the wire rope (L), it is smoothly wound in the spiral groove (51a) of the screw drum 51 to prevent the departure of the wire rope (L).

In addition, while maintaining a constant tension of the wire rope (L) to prevent the wire rope (L) is separated from the guide wheel 21 of the guide pulley 20 in advance.

In addition, in the safety device of the wire rope for the stage machine of the present invention, the support shafts (51b, 51c) are formed in the left and right centers of the screw drum (51), respectively, one side support shaft (51b) of the screw drum (51) The drive motor 41 of the drive unit 40 is axially coupled to the power transmission via the reduction gear 42 fixed to the left support plate 56, the drive motor 41 is coupled to the input side electromagnetic brake 70 While stopping the rotation of the screw drum 51 only when the drive motor 41 is stopped, the screw drum 51 is rotated when the drive motor 41 is operated, and the other side of the support shaft 51c of the screw drum 51 The output side electromagnetic brake 80 fixed to the right support plate 57 is coupled to stop the rotation of the screw drum 51 only when the driving motor 41 stops when the input electromagnetic brake 70 fails. At the time of operation of 41), the screw drum 51 is rotated to double the operation of the screw drum 51. By cracking down, safety accidents such as falling of the stage facilities are prevented.

Such a wire rope safety device for a stage machine of the present invention, the input side electromagnetic brake 70 installed on the drive motor 41 of the drive unit 40 is a spring braking type with a known alternating electromagnetic brake, so it is automatically applied when a power failure or a current interruption occurs. As the lining 74 of the inner disk plate 73 is in close contact with the friction cover 75 due to the spring 72, the motor shaft 41a of the drive motor 41 can be braked and the gap is adjusted. The screw can be easily adjusted when the lining 74 of the disk plate 73 wears, and of course, the braking force can be adjusted by the torque adjustment screw.

The input side electromagnetic brake 70 completely stops the rotation of the screw drum 51 only when the driving motor 41 is stopped. When the driving motor 41 is operated, the disc plate 73 is moved by the internal electromagnet 71. ) Is spaced apart from the friction cover 75 to smoothly rotate the screw drum (51).

In addition, an output side electromagnetic brake 80 is installed on the other side of the screw drum 51 and the support shaft 51c, and the spring 82 is automatically applied in the event of a power failure or a current interruption in the same principle even when the input side electromagnetic brake 70 fails. By violating the lining 84 of the inner disk plate 83 is in close contact with the friction cover 85, the support shaft 51c of the screw drum 51 is braked to stop the rotation of the screw drum 51. When the driving motor 41 is running, the lining 84 of the inner disk plate 83 is spaced apart from the friction cover 85 so as to rotate the support shaft 51c of the screw drum 51. As a result, safety accidents such as the fall of auxiliary facilities can be prevented in advance.

1 is an enlarged perspective view showing main parts of a safety device and a guide guide device of a wire rope for a stage machine according to an embodiment of the present invention;

Figure 2 is a front view showing the state of the safety device and guide guide device of the wire rope for the stage machine according to the embodiment of the present invention,

Figure 3 is a plan view showing a state of the safety device and guide guide device of the wire rope for the stage machine according to an embodiment of the present invention,

Figure 4 is a right side view showing the state of the safety device and guide guide device of the wire rope for the stage machine according to the embodiment of the present invention,

Figure 5 is an excerpt side view showing the operation of the safety device and guide guide device of the wire rope for the stage machine according to the embodiment of the present invention,

Figure 6 is an excerpt front view showing the operation of the safety device and guide guide device of the wire rope for the stage machine according to the embodiment of the present invention,

Figure 7 is an enlarged cross-sectional view showing the main portion of the electronic brake of the input side of the safety device and guide guidance device of the wire rope for the stage machine according to an embodiment of the present invention,

Figure 8 is an enlarged cross-sectional view showing the main portion of the output side electromagnetic brake of the safety device and guide guide device of the wire rope for the stage machine according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10: grid iron 11: guide sprocket

12: pulley

20: guide pulley 21: guide wheel

30: installation frame

40: drive unit 41: drive motor

41a: motor shaft 42: reducer

50: screw drum fixing frame 51: screw drum

51a: Spiral groove 51b, 51c: Support shaft

56, 57: left and right support plates 56a, 57a: bottom plate

56b, 57b: Vertical plates 58,58a, 58b, 58c: Frame fixing bar

60: guide guide frame 61: guide rail

61a: wire guide groove 61b: rotating shaft

62: rail support plate 63: rail moving bar

63a: Rail insertion groove 63b, 63c: Upper and lower rail protrusions

64: Linear guide rail 64a, 64b: Upper and lower rail grooves

65: guide rail fixing bar

70: input side electromagnetic brake 71: electromagnet

72: spring 73: disc plate

74: lining 75: friction cover

80: output side electromagnetic brake 81: electromagnet

82: spring 83: disk plate

84: lining 85: friction cover

90: fixed bottom

L: Wire Rope

W: ceiling

Claims (3)

The grid iron 10 is fixed to the ceiling (W), provided with a plurality of pulleys 12 having a guide sprocket 11 on the upper surface, and a plurality of guides installed on the grid iron 10 and hinged to rotate. A guide pulley 20 having a wheel 21 and a lower side of the grid iron 10 are installed to be moved up and down by a wire rope L connected through a guide sprocket 11 and a guide wheel 21. The installation frame 30 is connected to the stage lighting device and the membrane, the drive motor 41 is installed on the ground to provide the power required for the lifting movement of the installation frame 30 and generates a rotational force, and the drive motor 41 In the stage facility apparatus consisting of a drive unit 40 formed of a winding drum connected to and rotated through the reducer 42 to wind or recommend the wire rope (L); The winding drum is formed of a screw drum (51) in which a spiral groove (51a) is formed continuously on the outer periphery; Support plates 51b at both ends of the screw drum 51 are vertically erected from the bottom plates 56a and 57a and fixed to the fixed bottom 90 by bottom bolts 56a and 57a fastened by bolts and nuts. The left and right support plates 56 and 57 having vertical plates 56b and 57b into which 51c are inserted and pivotally supported, respectively, are formed, and the vertical bars (left and right support plates 56 and 57 are long bars). Four frame fixing bars 58, 58a, 58b, which are positioned on the upper, front, rear, and front, rear sides of 56b, 57b, respectively, and firmly fasten the left and right support plates 56, 57 as both ends are fastened by nuts. 58c) are horizontally formed, respectively, the screw drum fixing frame 50 for axially fixing the screw drum 51 on the left and right; The guide rail is fixed between the left and right support plates 56 and 57 of the screw drum fixing frame 50 and both ends thereof are fixed to the inner surfaces of the vertical plates 56 b and 57 b of the left and right support plates 56 and 57, respectively. The bar 65 is horizontally formed, and the end surface of the bar 65 is horizontally fixed to the screw drum 51 side of the guide rail fixing bar 65 in an H shape, and has upper and lower rail grooves 64a and 64b at the centers of the upper and lower sections, respectively. A linear guide rail 64 is formed, and a rectangular parallelepiped has a rail insertion groove 63a that is formed in a recess in the front surface thereof to correspond to the linear guide rail 64, and upper and lower rail grooves are disposed on upper and lower rail insertion grooves 63a. A plurality of rail moving bars 63 having upper and lower rail protrusions 63b and 63c fastened to be slidably moved in the horizontal direction to 64a and 64b, respectively, are formed on the rear surface of the rail moving bar 63. C-shaped fixed installation with the opening part located to the rear side The rail support plate 62 is formed, and is erected between the rail support plate 62 and is axially coupled to the rail support plate 62 by the pivot shaft 61b and wound around the spiral groove 51a of the screw drum 51. A guide rail 61 having a wire guide groove 61a surrounding the wire rope L vertically positioned upward is formed so that the wire rope L is wound in the spiral groove 51a of the screw drum 51. Or a stage machine having a guide guide frame 60 for guiding the wire rope L to be positioned in the spiral groove 51a of the screw drum 51 while slidingly moving in the left and right directions along the spiral groove 51a. Guide guide device for wire rope. The grid iron 10 is fixed to the ceiling (W), a plurality of pulleys (12) provided with a guide sprocket 11 on the upper surface, and a plurality of hinge rotates installed on the grid iron (10) A guide pulley 20 having a guide wheel 21 and a lower side of the grid iron 10 are installed to move up and down by a wire rope L connected through a guide sprocket 11 and a guide wheel 21. The installation frame 30 is connected to the stage lighting device and the membrane, the drive motor 41 is installed on the ground to provide the power required for the lifting movement of the installation frame 30 and generates a rotational force, the drive motor 41 ) Is connected to the drive unit 40 of the stage facility consisting of a drive unit 40 formed by a winding drum which is connected to and rotates through the reducer 42 to wind or recommend the wire rope L. In the event of overload An apparatus for a stage facility for controlling a winding operation and a winding operation of a wire rope L; The winding drum is formed of a screw drum (51) in which a spiral groove (51a) is formed continuously on the outer periphery; Support plates 51b at both ends of the screw drum 51 are vertically erected from the bottom plates 56a and 57a and fixed to the fixed bottom 90 by bottom bolts 56a and 57a fastened by bolts and nuts. The left and right support plates 56 and 57 having vertical plates 56b and 57b into which 51c are inserted and pivotally supported, respectively, are formed, and the vertical bars (left and right support plates 56 and 57 are long bars). Four frame fixing bars 58, 58a, 58b, which are positioned on the upper, front, rear, and front, rear sides of 56b, 57b, respectively, and firmly fasten the left and right support plates 56, 57 as both ends are fastened by nuts. 58c) are horizontally formed, respectively, the screw drum fixing frame 50 for axially fixing the screw drum 51 in the left and right; Support shafts 51b and 51c protrude from the left and right centers of the screw drum 51, respectively, and reducers 42 fixed to the left support plate 56 are provided at one support shaft 51b of the screw drum 51. The drive motor 41 of the drive unit 40 is axially coupled to be capable of power transfer, and the drive motor 41 is coupled to the input side electromagnetic brake 70 so that the screw drum 51 of the screw drum 51 is stopped only when the drive motor 41 is stopped. The screw drum 51 rotates when the driving motor 41 is operated while stopping the rotation, and the output side electromagnetic brake 80 fixed to the right support plate 57 is attached to the other support shaft 51c of the screw drum 51. Is combined to stop the rotation of the screw drum 51 only when the driving motor 41 stops when the input electromagnetic brake 70 fails, and the screw drum 51 is rotated when the driving motor 41 is operated. By preventing the operation of the screw drum 51 to prevent the safety accidents such as falling of the stage facilities Safety device of wire rope for stage machine to prevent The method of claim 2; The guide rail is fixed between the left and right support plates 56 and 57 of the screw drum fixing frame 50 and both ends thereof are fixed to the inner surfaces of the vertical plates 56 b and 57 b of the left and right support plates 56 and 57, respectively. The bar 65 is horizontally formed, and the end surface of the bar 65 is horizontally fixed to the screw drum 51 side of the guide rail fixing bar 65 in an H shape, and has upper and lower rail grooves 64a and 64b at the centers of the upper and lower sections, respectively. A linear guide rail 64 is formed, and a rectangular parallelepiped has a rail insertion groove 63a that is formed in a recess in the front surface thereof to correspond to the linear guide rail 64, and upper and lower rail grooves are disposed on upper and lower rail insertion grooves 63a. A plurality of rail moving bars 63 having upper and lower rail protrusions 63b and 63c fixed to be slidably moved in the horizontal direction to 64a and 64b, respectively, are formed on the rear surface of the rail moving bar 63. This c shape is fixed with the opening part located to the rear side. The rail support plate 62 is formed, and is erected between the rail support plate 62 and is axially coupled to the rail support plate 62 by the pivot shaft 61b and wound around the spiral groove 51a of the screw drum 51. A guide rail 61 having a wire guide groove 61a surrounding the wire rope L vertically positioned upward is formed so that the wire rope L is wound in the spiral groove 51a of the screw drum 51. Or a guide guide frame 60 for guiding the wire rope L to be positioned in the spiral groove 51a of the screw drum 51 while slidingly moving in the left and right directions along the spiral groove 51a. Safety device for machine wire rope.

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