KR950009133B1 - Going up and down device for stage - Google Patents

Abstract

a driving motor, a deceleration gear box and a limit box respectively installed on a supporting plate; a motor shaft associated straight with an input shaft of the deceleration gear box; an electronic brake installed between the input shaft and the motor shaft; the limit box having a limit gear engaged with a gear of the deceleration gear box by a center bar; the center bar having a raising limit bar and a falling limit bar which are formed horizontally; and first and second limit switches associated by first and second limit blocks and connected by an electric wire to a distribution plate.

Description

Stage hoist

1 is an illustration of a stage for explaining the present invention.

2 is a block diagram of a conventional stage elevating device.

3 is a perspective view of the stage elevating apparatus according to the present invention, in particular showing the configuration of the reduction gear as viewed from the bottom.

4 is a plan view of the invention, in particular in a limit box.

5 is a front configuration diagram of FIG.

* Explanation of symbols for main parts of the drawings

10: stage or screen 12: wire

16: motor 18: drum

20: rubber belt 22: reduction gear

50: support 52: motor

54: reduction gear box 56: limit box

58: output shaft 60: drum

62: wire 64: motor shaft

66: input shaft 68: primary reduction gear

70: gear 72: limit gear

74: center rod 76: upward limit rod

78: descent limit 80: power distribution board

82, 84: limit switch 86: distance control

88, 90: distance adjusting screw 92, 94: limit block

96: electronic brake

The present invention relates to a stage elevating device, and in particular, the drive motor side and the reduction gear is formed integrally, the reduction gear adopts a worm gear method, the gear is connected to the shaft of the drum on which the stage lifting wire is wound, the gear And a stage elevating device that is capable of raising, stopping, and adjusting the stage as a control means in the limit box.

In the present invention, the stage may include a stage or a screen in a play or a movie, and the like, such as hoisting a flag, such as a hoisting stand, collectively expressed as a stage, and the stage elevating device adjusts the stage to a required height. Say the device.

The general configuration of such a stage device is the same as that of FIG. 1, so that one end of the wire 12 is placed on both ends of the stage or the screen 10, and the other end of the wire 12 is wound around the drum 18 of the shaft of the motor 16, which is a stage lifter. When the motor 16 is rotated forward and backward, the stage 12 or the screen 10 and the curtains are lifted or opened as the wire 12 is wound or unwound by the drum 18.

The conventional configuration of the stage elevating device for this purpose is the same as that of FIG. 2, by connecting the rubber belt 20 to the pulley of the drive motor 16 shaft to drive the reduction gear 22, and the drum 18 at the tip of the reduction gear 22. It is comprised so that the wire 12 wound around this drum 18 may be wound up or unwound.

However, in the conventional stage elevating device, the driving force for driving the drum 18 is decelerated from the motor 16 through the rubber belt 20, so that the noise is not only high but also the power transmission efficiency is very low. Difficulty in stopping control and difficulty in writing for various purposes.

Accordingly, in the present invention, the drive motor shaft and the reduction gear shaft are formed in a straight line to solve the conventional disadvantage of connecting with a rubber belt, and the reduction gear shaft is provided with an electronically controlled brake, and the reduction gear adopts two worm gears. The deceleration and elevating control is accurate, and a limit box is formed so that the elevating height can be adjusted.The limit switch attached to the limit gear is turned on and off so as to stop the stage at the desired elevating height. will be.

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

According to the present invention, the reduction gear box 54 and the limit box 56 are installed on the support 50 such as the driving motor 52, and the drum 60 is provided on the output shaft 58 from the reduction gear box 54. This is a stage elevating device of the appearance that the stage elevating wire 62 is wound, the motor shaft 64 and the input shaft 66 is coupled in a straight line while the electromagnetic brake 96 is installed on the input shaft 66, deceleration In the gear box 54, a primary reduction gear 68 orthogonal to the gear formed on the input shaft 66 and coupled to the worm gear, and an output shaft orthogonal to the primary reduction gear 68 and coupled to the worm gear ( 58) is inherent.

In addition, a limit gear 72 engaged with the gear 70 of the output shaft 58 is screwed to the center rod 74 in the limit box 56 formed on the reduction gear box 54. ) Up and down horizontally up and down limit bar 76 and the lower limit bar 78 is installed with a thread, the limit rods (76), (78), respectively, a limit switch connected to the power distribution plate (80) by wires Limit switches 84 of the rising limiter limit block 94 screwed to the rising limiting rod 76, wherein 82 and 84 are coupled via limit blocks 92 and 94; The lower limit bar 78 is assembled so as to be loosely screwed in the position where the penetrating loosely, the limit switch 82 of the lower limit bar limit block 92 screwed to the lower limit bar 78 is The rising limit bar 76 is also penetrated through the through hole which is not affected by the rotation of the rising limit bar 76, Limit rods 76, 78, all of which has a through hole so as not interfere with the turning vain jungsimbong 74.

In addition, the two bars (76), 78 in the center position of the distance adjuster 86 is screwed to the center bar 74, the two bars (76), 78 has a structure that is assembled so as to pass through have.

In the drawings, reference numerals 88 and 90 denote distance adjusting screws.

Figure 3 is a separate configuration diagram of the present invention, Figures 4 and 5 are the assembled view of the present invention.

Next, the operation of the present invention of the above-described configuration will be described in detail.

First, the distance adjusting screws 88 and 90 of the limiting rods 76 and 78 are rotated to the left or right to adjust the height of the stage lifted, and the screws to the limiting rods 76 and 78 are rotated. The combined limit switches 84 and 82 are brought closer to or farther from each other, and the distance adjuster 86 between these limit switches 84 and 82 is screwed to the center rod 74 so that the center rod ( 74) the limit switch 84 or 82 is operated by approaching the upward limiting rod 74 or the lower limiting rod 78 as the rotation is performed.

When the adjustment is completed, the power is applied to drive the motor 52. At this time, the locking state of the electronic brake 96 is released to enable rotation of the input shaft.

Assuming that the forward rotation of the motor 52 is an operation of elevating the stage (reverse rotation is a descending operation), the motor rotation speed is decelerated in the reduction gear via the input shaft 66. For example, the rotation speed of the motor 52 is 1500. Since the output should be adjusted to 10 to 20 rpm when the speed is -2000 rpm, the reduction gear ratio and the accuracy of the operation are determined by utilizing the two-stage reduction gear. Therefore, the rotational force of the input shaft 66 is decelerated by the primary reduction gear 68, and again. The drum 60 installed on the output shaft 58 while being decelerated by the gear of the output shaft 68 is rotated to wind the wire 62 to raise the stage.

In this way, the drum 60, that is, the output shaft 58 is rotated, but its range (stage raising and lowering range) is limited, which is limited to the limit gear 72 of the center rod 74 on the gear 70 provided on the output shaft 58. As the limit gear 72 is rotated, the integrally coupled center bar 74 is rotated in place, and the distance adjuster 86 screwed to the center bar 74 is forcibly conveyed to limit lift. When contacting the limit switch 84, the power of the motor is turned off so that the rotation is stopped, the stage being raised is stopped on the spot.

Along with this, the electromagnetic brake 96 is also locked while the power is turned off so that the stage does not descend from the stopped position.

If the motor shaft rotates in reverse, the distance adjuster 86 is moved to reach the lower limit limit switch 82 and stops the lowered state, so that the descending stage is located there.

As described above, the present invention has no noise because the motor shaft and the reduction gear shaft are formed in a straight line, and the operating parts are located inside the box, which does not damage other devices around the stage, as well as the number of parts compared to the conventional devices. It is reduced and must have characteristics that can be applied not only to the stage as well as to the hoisting device similar thereto.

Claims (2)

In a stage elevating device which drives a drum with a drive motor and elevates the stage with a wire wound on the drum, the drive motor 52, the reduction gear box 54, and the limit box 56 on the support 50. While being installed, the motor shaft 64 and the input shaft 66 of the reduction gear box 54 are installed in a straight line, and the electromagnetic brake 96 is installed between the input shaft 66 and the motor shaft 64, the input shaft 66 is formed in the reduction gear box 54 by forming a secondary reduction gear in which the primary reduction gear 68 and the output shaft 58 on which the gear 70 is installed are orthogonal to each other to be engaged with each other. The limit gear 72, which is engaged with the gear 70 in the reduction gear box 54, is screwed to the center bar 74, and the upper limit bar 76 and the lower limit bar 76 are raised and lowered horizontally to the center bar 74. The limiting rod 78 is installed with a thread, and the rising limiting rod 76 has a limit switch 82 connected to a power distribution plate 80 by an electric wire, The stage elevating device, characterized in that (84) is configured to be screwed through the limit blocks (92), (94). According to claim 1, wherein the center rod (74) is the limiting rods (76), 78 is installed in the limit box 56 can be retractable while the center rod (74) only conveys the distance adjuster 86, the limiting rod (76), (78) is a stage lift device, characterized in that coupled to transfer only the limit blocks (92), (94) provided with the limit switch (84), (82).