JP2003117264A - Stage setting lifting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide stage setting lifting device by which the setting width is narrowed. SOLUTION: The stage setting lifting device 1 lifts a hanging pipe 2 with a plurality of hanging wires 14 hung from the upper part of a stage 3 and holds stage settings. One end of each hanging wire 14 is connected to the hanging pipe 2 and a counter weight 13 is connected to the other end. A wire winding rotary drum 17 which is driven and rotated by an electric motor 18 is arranged in a vertical direction in the neighborhood off the counter weight. One- side ends of upper and lower driving wires 20 and 22 are inversely wound around the rotary drum, respectively and the other side ends are connected to the counter weight via upper and lower guide pulleys 19 and 21 which are arranged in the upper position of the stage and in the neighborhood of a floor. A wire guide is also disposed which guides the both driving wires to prescribed positions on the front of the rotary drum in response to the rotation amount of the rotary drum.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device for a stage facility. 2. Description of the Related Art Generally, stage equipment is provided in a theater, a multipurpose hall, and the like. The stage equipment has a large number of hanging pipes for hanging curtains, lights, and the like, and elevating and lowering of these hanging pipes. A device is provided. [0003] By the way, these hanging pipes are used for hanging predetermined curtains, lights and the like and moving up and down in accordance with each performance program. In addition, each of them is suspended via a hanging rope, and the lifting and lowering is performed manually or electrically, but in terms of workability, an electric type is used. Many are adopted. Heretofore, there has been a motor-driven lifting device using a balance weight in order to reduce the size of the driving part. As shown in FIG. 4, a lifting wire (wire rope) 73 having one end connected to a suspension pipe 71 and the other end connected to a balance weight 72, as shown in FIG. A friction type winding device (including a wire traction type machine) having a friction wheel 74 interposed in the middle of 73 to wind and unwind the hanging wire 73 by frictional force and an electric motor 75 for rotating the friction wheel 74. 76)
And a guide pulley 78 which is disposed at a predetermined position on the upper surface of the saw-shaped support portion 77 and guides the suspension wire 73 to a predetermined position of each suspension pipe 71. In addition, one end of the hanging wire 73 is made into a plurality of wires, and the other end is made into a single wire. In the above-described configuration, the electric motor 75 of the friction type winding device 76 is driven to rotate the friction wheel 74 so that the suspension pipe 71 is moved up and down above the stage 79 via the suspension wire 73. Can be done. [0006] According to the construction of the lifting device, the suspension wire 73 to which the counterweight 72 is connected is connected via the friction wheel 74 rotatably provided around the horizontal axis. Since the winding or unwinding is performed, the capacity of the electric motor 75 can be small. However, since the friction wheel 74 and the electric motor 75 for rotating the friction wheel 74 are also provided in the horizontal direction, the installation width of the elevating device is increased. Therefore, if an elevating device is arranged in accordance with a large number of hanging pipes 71, a considerably large installation space is required. For example, even if the elevating device is displaced back and forth in the wire winding direction, a considerable installation space is required. Required, which may lead to inconvenience in the installation of other equipment and sufficient working space. There was a problem such as not being able to come. SUMMARY OF THE INVENTION It is an object of the present invention to provide a lifting device for stage equipment in stage equipment capable of reducing the installation width. [0008] In order to solve the above-mentioned problems, a lifting equipment for lifting equipment in stage equipment according to the present invention comprises a plurality of suspension equipment suspended from a support member provided above the stage. A lifting device for lifting and lowering a bar-shaped hanging tool for holding a suspended object while being hung by a rope, and one end of which is attached to the other end of the hanging cable connected to the bar-shaped hanging tool. A counterweight is attached, and a rotatable drum for winding a rope body, which is rotationally driven by an electric motor, is provided in the vertical direction in the vicinity of the counterweight, and one end side is wound around the rotatable drum in the opposite direction. The other ends of the upper drive rope and the lower drive rope are connected to the counterweight via upper guide pulleys and lower guide pulleys provided above the stage and near the floor, and According to the amount of rotation of the rotating drum,
It is provided with a guide device for guiding to a predetermined position on the surface of the rotating drum. According to the above configuration, the rotary drum for winding the driving rope is provided in the vertical direction. Therefore, the installation width of the rotary drum can be significantly reduced as compared with the case where the rotary drum is installed in the horizontal direction. Can be. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a lifting device for a stage equipment according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a suspended object lifting / lowering apparatus 1 according to the present embodiment includes a hanging pipe (a hanging pipe for suspending a hanging curtain M) such as hanging curtains and lighting in stage equipment provided in a theater. An example of a rod-shaped hanging member 2 is to be lifted and lowered via a saw-shaped support member 4 arranged near the ceiling of the stage 3. That is, the lifting device 1 is shown in FIGS.
As shown in FIG. 3, a counterweight (a counterweight is a counterweight) which is guided by a guide rail 11 vertically extending along a wall surface of one sleeve 3a of the stage 3 via a guide portion 12 so as to be able to move up and down. 13), one end of which is branched into a plurality of branches, and each branch end is connected to a plurality of locations of the hanging pipe 2;
The other end of the suspension wire (suspension cord) 14 connected to the counterweight 13 disposed on one sleeve 3a of the stage 3 and the sleeve 3a corresponding to the counterweight 13 Support frame 15 provided at a predetermined position
A rotary drum 17 for winding a wire rotatably supported on the support frame 15 about a vertical axis via a bearing 16; and a rotary drum 17 supported on the upper portion of the support frame 15 in the vertical direction. A motor 18 with a brake for rotating the drum 17 (note that the rotating drum 17
Are supported by the bearing 16 and the electric motor 18),
After one end is wound around the rotary drum 17 in a predetermined direction, it is fixed to the upper end of the drum, and the other end is wound (wrapped) around an upper guide pulley 19 provided on the support member 4 side. Then, an upper drive wire (upper drive cable) 20 connected to the upper portion of the counterweight 13
Similarly, one end is wound around the rotary drum 17 in the opposite direction to the upper drive wire 20 and then fixed to the lower end of the drum.
After being wound (wrapped) around the lower guide pulley 21 provided on the side a, a lower driving wire (lower driving cable) 22 connected to the upper part of the counterweight 13 is also supported. A wire guide device (cord body) for guiding the upper and lower drive wires 20 and 22 on the rotary drum 17 to the winding position (winding position) and the feeding position of the upper and lower driving wires 20 and 22 to the proper position. An example of the guide device is also referred to as a traverser) 23. The wire guide device 23 holds the support frame 1 at a position corresponding to a position where the wire on the counterweight 13 side of the rotary drum 17 is wound and fed.
5, a support frame 31 having a rectangular shape in a front view and having a guide rail (guide portion) 31a having a rectangular cross-section at least on the left and right sides, and a wire guide space formed in the center. At the center position of the support frame 31, a rotary screw shaft 33 provided rotatably around a vertical axis via upper and lower bearings 32, that is, in a vertical direction parallel to the rotation axis of the rotary drum 17. A guide shoe (grooved section) having a nut body 34 which is a female thread portion screwed to the rotary screw shaft body 33 and engaged with and guided by the guide rails 31a on both sides at the left and right upper and lower positions. ) 35, and wire guides provided on the upper surface of the movable body 36 on the counterweight 13 side via mounting brackets 37 (37A, 37B). Deflection pulley 38 (38A, 38
B) and a driving gear 39 attached to a shaft portion 17a protruding from the rotary drum 17 through the bearing 16.
And a driven gear 40 attached to the lower end of the rotary screw shaft body 33 and meshed with the drive gear 39.
Of course, the upper drive wire 20 wound on the upper side of the rotary drum 17 is guided to the rotary drum 17 side via the upper turning pulley 38 (38A), and The lower drive wire 22 to be wound is guided to the rotary drum 17 via the lower turning pulley 38 (38B). As shown in FIG. 3, each turning pulley 38 (38A, 38B) is connected to each wire 20. , 22 are inclined so as to match the winding direction of the rotating drum 17. Here, each of the driving wires 20, 22
The following describes the state of winding around the rotating drum 17.
The two drive wires 20 and 22 wound around the rotating drum 17 in opposite directions are always maintained at a constant gap. When one wire is wound up by a predetermined amount, the other wire is wound. It is fed out by the same amount, and the winding length on the rotary drum 17 is, of course, equal to the lifting amount of the suspension pipe 2. The driving wires 20, 2
The winding and unwinding positions of the second rotating drum 17 are moved along the rotating drum 17 by the wire guide device 23 in accordance with the winding and unwinding amounts of the wire. That is, when the rotating drum 17 is rotated, the rotating screw shaft body 33 is rotated via the driving side gear 39 and the driven side gear 40, and the moving body 36 is moved. In other words, both turning pulleys 38 (38A, 38A) for guiding both driving wires 20, 22 according to the amount of rotation of the rotary drum 17.
B) moves following the proper winding and feeding position on the rotating drum 17. An encoder 41 for detecting the amount of rotation of the rotary drum 17 is connected to the upper end of the rotary screw shaft 33, and when the movable body 36 exceeds the allowable movement range, the rotary drum 17 is rotated. 17 rotation, ie, the electric motor 18
Abnormality detecting means 42 for stopping the rotation of the motor. The abnormality detecting means 42 is provided on the support frame 1.
5 and a casing 43 provided on the
3, a detection screw shaft 44 rotatably provided in the nut 3, a nut body (not shown) screwed to the detection screw shaft body 44, and an upper limit position and a lower limit of an allowable movement range of the nut body. A limit switch (not shown) for detecting a position,
It comprises a pair of sprockets 45, 46 provided on the rotary screw shaft 33 and the detection screw shaft 44, and an endless chain 47 wound around both sprockets 45, 46. Therefore, when the rotary screw shaft body 33 rotates beyond the allowable rotation amount, the detection screw shaft body 44 also rotates by the sprockets 45 and 46 and the chain 47, and the nut body moves. If the range exceeds the allowable range, the electric motor 18 is stopped by the limit switches disposed at the upper and lower limits. The lower guide pulley 21 serves to tension the lower drive wire 22, and its position can be adjusted, for example, in the vertical direction. Specifically, the mounting plate body 51 to which the lower guide pulley (also referred to as a tension pulley) 21 is mounted can adjust its height position with respect to its support bracket 52 by a screw rod 53 and a nut 54. Has been. Of course, the mounting plate 51 is provided on the support frame 15. The support member 4 is provided with a required number of turning pulleys 24 for guiding the suspension wires 14 connected to the suspension pipe 2 to the counterweight 13 side. In the above configuration, when the rotating drum 17 is rotated in a predetermined direction by the electric motor 18 and, for example, the upper drive wire 20 is wound on the rotating drum 17 and the counter weight 13 is raised, the counter weight 13 is connected to the counter weight 13. The other end of the hanging wire 14 descends,
Therefore, the hanging pipe 2 connected to one end thereof descends on the stage 3 and, for example, a banner is lowered. Of course, at this time, the lower drive wire 22 is fed out of the rotary drum 17, and the moving body 36 moves up and down in accordance with the rotation amount of the rotary drum 17.
Is guided to an appropriate position. When the rotating drum 17 is rotated in the opposite direction, the counterweight 13 is lowered, and the hanging pipe 2, that is, the hanging curtain, is raised via the hanging wire 14. According to the structure of the lifting device, the rotary drum 17 for winding the drive wires 20 and 22 and the electric motor 18 are installed at the position corresponding to the counterweight 13 and in the vertical direction. Drum 1
The installation width can be greatly reduced as compared with the case where the motor 7 and the motor 18 are installed in the horizontal direction, and therefore, even when a large number of hanging pipes are required, the installation can be easily performed. In addition, according to this configuration, since the installation width is small (narrow), when the existing manual lifting device is to be automated, the installation width of the manual lifting device is limited by the counterweight. Even in the case of a narrow width (for example, about 250 mm) depending only on the width, the manual wire (or rope) fixing means and the workability of the operator, for example, it is installed (replaced) instead of the fixing means. Only the modification can be performed without any trouble. In the case where the existing manual lifting device is replaced with a lifting device having a plurality of friction wheels for automation, the time and effort required to wind a wire around the friction wheel increases, and the length of the suspension pipe increases. There are drawbacks such as a change in hanging height. Furthermore, since the wire is wound on the rotary drum, slippage due to imbalance in tension acting on the wire (or rope) unlike a friction wheel does not occur, so that there is no need to adjust the counterweight. . As described above, according to the structure of the hoisting and lowering device in the stage equipment of the present invention, the rotary drum for winding the driving rope is provided in the vertical direction. The installation width can be greatly reduced as compared with the case of installation in the horizontal direction, and therefore, even when a large number of bar-shaped hanging members are required, the installation can be easily performed. Moreover, according to this configuration, the installation width may be narrow. Therefore, when automating the existing manual lifting device, the installation width of the manual lifting device is limited by the width of the counterweight and the operator. Even in a narrow case depending only on the workability of the above, the remodeling can be performed without any trouble.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing a schematic overall configuration of a suspended lifting device in a stage facility according to an embodiment of the present invention. FIG. 2 is a side view of a main part of the lifting device. FIG. 3 is a sectional view taken along line AA of FIG. 2; FIG. 4 is a front view showing a schematic entire configuration of a conventional suspended object lifting device. [Description of Signs] 1 Suspended lifting device 2 Hanging pipe 3 Stage 4 Support member 13 Counter weight 14 Hanging wire 17 Rotary drum 18 Electric motor 20 Upper drive wire 22 Lower drive wire 23 Wire guide device

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Isao Higashi             1-7-89 Minami Kohoku, Suminoe-ku, Osaka-shi, Osaka             No. Within Hitachi Zosen Corporation

Claims (1)

Claims: 1. A lifting and lowering rod-shaped suspender for holding a suspended object, which is suspended by a plurality of suspension ropes suspended from a support member provided above the stage. A lifting device for lifting, wherein a counterweight is attached to the other end of a hanging rope body having one end connected to the rod-shaped lifting device, and the rope body is rotationally driven by an electric motor near the counterweight. A take-up rotary drum is provided in the vertical direction, and the other ends of the upper drive rope and the lower drive rope wound around the rotary drum with one end sides being in opposite directions to each other, the upper end of the stage. And an upper guide pulley and a lower guide pulley provided near the floor, connected to the counterweight, and the two drive ropes are positioned at predetermined positions on the surface of the rotary drum according to the amount of rotation of the rotary drum. To Suspended matter lifting device in Stage Equipment, characterized in that a cord guide device for the inner.