KR100939997B1 - Vertically Expandable Apparatus - Google Patents

Abstract

A vertical stretching apparatus is disclosed in which a light weight and vertical position control are precisely and quickly performed. The vertical stretching apparatus may include a rope drum housing accommodating a spring rope having a power and signal supply cable therein; An elevating unit installed on the rope drum housing and configured to raise or lower the spring rope; A control unit for controlling driving of the lifting unit; A fixed tube fixedly installed on the elevating unit; And a movable tube slidably fitted inside the fixed tube, the end of the spring rope being fixed to a lower end thereof, and the cable extending through the inside thereof and fixed to the upper end thereof. It is possibly installed, the movable tube is raised or lowered by the spring rope in accordance with the operation of the lifting unit by the control of the control unit.

Mast, Extension, Antenna, Position Control, Unmanned Surveillance System, Telescoping, Spring Rope

Description

Vertically Expandable Apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical stretching apparatus, and more particularly, to a vertical stretching apparatus in which the position control in the vertical direction is light and accurate.

A vertical stretching device such as a telescoping mast is a device for mounting an application device such as a transmitting / receiving antenna of a broadcast relay vehicle, a photographing camera or an observation equipment, and raising or lowering it freely.

In general, a tube having a cylindrical tube overlapping with each other to operate in relation to each other is built in the drive device using the elasticity of the pneumatic cylinder, hydraulic cylinder, rack gear or coil spring to expand the tube to be raised or contracted by By lowering, the uppermost mounted application device is lifted.

Conventional pneumatic or hydraulic cylinder driven vertical stretching device is expensive to manufacture, heavy product load, frequent failure in the seal packing part of the mast drive unit, coil spring driven vertical stretching device is gear and spring assembly Due to the complicated structure, it is difficult to manufacture, and at the same time, it frequently maintains and shorten its lifespan.

On the other hand, vertical stretching devices are used to support the unmanned market value mounted on unmanned vehicles used for military or police. However, due to the characteristics of the unmanned vehicle, the vertical stretching device supporting the unmanned market value is low in weight and, in other words, the position in the vertical direction of the unmanned monitoring device must be accurately and quickly made. However, the conventional vertical stretching apparatus of the pneumatic, hydraulic cylinder drive system or coil spring drive system has a problem that the weight is large, and the position control is accurate, quick and difficult to achieve.

In addition, while the cables for supplying power or signals to the unmanned supervision apparatus located at the top need to be adequately protected from the external environment, these cables are exposed to the outside and protected in the conventional stretching apparatus. There is a problem that there is no space inside.

Accordingly, it is an object of the present invention to provide a vertical stretching apparatus which is light in weight and precisely and quickly controlled in the vertical direction.

In addition, another object of the present invention is to provide a vertical stretching device that can protect the cable for supplying power or signals to the application device installed on the top from the external environment.

The purpose of the above is, a rope drum housing in which a spring rope in which power and signal supply cables are built; An elevating unit installed on the rope drum housing and configured to raise or lower the spring rope; A control unit for controlling driving of the lifting unit; A fixed tube fixedly installed on the elevating unit; And a movable tube slidably fitted inside the fixing tube, fixed to an end of the spring rope at a lower end thereof, and extending through the inside of the cable and fixed at the upper end thereof.
An application device is detachably installed on the movable tube,
When the spring rope is raised by the elevating unit, the spring rope housed in the rope drum housing is supplied to the elevating unit side. When the spring rope is lowered by the elevating unit, the spring rope is moved. Is housed in the form of a wheel in the rope drum housing,
When the spring rope is raised and lowered, the movable tube is achieved by a vertical stretching device that rises or falls.

In addition, the above object, the rope drum housing housing the spring rope is built in the power and signal supply cable; An elevating unit installed on the rope drum housing and configured to raise or lower the spring rope; A control unit for controlling driving of the lifting unit; A fixed tube fixedly installed on the elevating unit; At least one extension tube slidably fitted inside the fixed tube; And a movable tube slidably fitted inside the extension tube, the end of the spring rope being fixed to a lower end thereof, and the cable extending through the inner part and fixed to the upper end thereof.
An application device is detachably installed at the top of the movable tube,
When the spring rope is raised by the elevating unit, the spring rope housed in the rope drum housing is supplied to the elevating unit side. When the spring rope is lowered by the elevating unit, the spring rope is moved. Is housed in the form of a wheel in the rope drum housing,
When the spring rope is elevated the movable tube is raised or lowered,
The extension tube is achieved by a vertical stretching device that is raised and lowered relative to the movable tube.

Preferably, the lifting unit, the rotary motor; A first elevating gear installed on a first rotating shaft which receives and rotates the rotational force of the rotary motor; And a second elevating gear installed on a second rotating shaft which receives and rotates the rotational force of the first rotating shaft, wherein the spring rope is positioned between the first and second lifting gears so that the first and second lifting gears The spring gear is geared.

Preferably, the first rotation shaft may receive a rotational force from the worm gear for converting the rotation direction of the rotary motor.

Further, preferably, the cross section of the filament wound to form the spring rope may have a triangular shape having a vertex on the outer side.

Preferably, an upper limit and a lower limit detection sensor may be installed at an upper end of the fixed tube, and upper and lower limit sensing elements may be installed at a lower end and an upper end of the movable tube, respectively.

In addition, upper and lower limit sensors may be installed at upper ends of the fixed tubes, respectively, and upper and lower limit sensing elements may be installed at lower ends of the extension tubes and upper ends of the movable tubes, respectively.

Preferably, the detection sensor may be a proximity sensor.

According to the present invention, a disk-shaped flange having a through hole is installed at the upper end of the movable tube, and a ring-shaped support flange is installed at the upper end of the fixed tube to support the lifting of the movable tube. A plurality of guide rails may protrude from the outer surface of the movable tube in the height direction, and guide grooves may be formed in the support flanges of the fixed tube to accommodate the guide rails, respectively.

Preferably, the cable is fixed to the cable fixing bracket installed on the back of the disk-shaped flange, the connector for connection with the application device is coupled to the end of the cable, the connector can be exposed through the through hole have.

In addition, the upper end of the movable tube is provided with a disk-shaped flange having a through hole for fixing the application device, the upper end of the extension tube and the fixed tube of the ring-shaped to support the lifting of the movable tube and the extension tube, respectively A support flange is installed, and a plurality of guide rails protrude from the outer surface of the movable tube in a height direction, and guide grooves for receiving the guide rails are formed inside the support flange of the fixed tube, respectively. A stopper protrudes in the circumferential direction from a portion between the guide rails at a lower end thereof, and the stopper is caught by an inner end of the support flange of the extension tube, thereby allowing the extension tube to rise as the movable tube rises.

Preferably, a support ring is installed along the lower end of the movable tube and the extension tube, respectively, and the extension tube can be lowered as the movable tube descends by the contact of the support ring.

In addition, the above object, a rope drum housing that is housed with a spring rope in which the power and signal supply cable is built; A lifting unit including a rotation motor installed on the rope drum housing and a gear array configured to transfer the rotational force of the rotary motor to the spring rope as a lifting force; A control unit for controlling driving of the lifting unit; A fixed tube fixedly installed on the elevating unit; At least one extension tube slidably fitted inside the fixed tube; And a movable tube slidably fitted inside the extension tube, the end of the spring rope being fixed to a lower end thereof, and the cable extending through the inner part and fixed to the upper end thereof.
When the spring rope is raised by the elevating unit, the spring rope housed in the rope drum housing is supplied to the elevating unit side. When the spring rope is lowered by the elevating unit, the spring rope is moved. Is housed in the form of a wheel in the rope drum housing,
The spring rope is lifted by gear coupling with a pair of opposing lift gears of the gear array,
When the spring rope is elevated the movable tube is raised or lowered,
The extension tube may be achieved by a vertical stretching device that is lifted relative to the movable tube.

According to the above configuration, the vertical stretching apparatus is lightweight and can be accurately and quickly performed in the vertical direction.

In addition, the cable for supplying power or signals to the application installed on the top can be protected from the external environment.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention.

1 shows the appearance of a vertical stretching apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the vertical stretching apparatus of the present invention includes a rope in which a spring rope 102 (see FIGS. 2 and 3) in which a cable 225 (see FIGS. 2 and 3) is built is received. A drum housing 100, a lifting unit 120 and 130 installed on the rope drum housing 100 and raising or lowering the spring rope 102, and a control unit 110 to control driving of the lifting unit 120 and 130. , A fixed tube (200) fixed on the elevating unit (130), an extension tube (210) slidably fitted inside the fixed tube (200), and slidably fit inside the extension tube (210), once The end of the spring rope 102 is fixed to, and the cable 225 extends through the inside includes a movable tube 220 is fixed at the other end.

Here, the spring rope 102 refers to a rope made of a spring shape in which the filament is wound, and has a flexibility that can be accommodated in the shape of a wheel in the rope drum housing 100.

An application device (not shown), for example, a transmitting / receiving antenna, a photographing camera, or an unmanned monitoring device is detachably installed on the upper portion of the movable tube 220, and the movable tube 220 is a lifting unit under control of the control unit 110. In accordance with the operation of the 120,130 is raised or lowered by the spring rope 102, the extension tube 210 is elevated in relation to the movable tube 220.

Here, the extension tube 210 refers to a tube for extending the extension length of the vertical stretching device, at least one may be installed. In addition, the term "in relation to" refers to performing an operation together by connecting or combining by any means.

Figure 2 is a vertical cross-sectional view showing a vertical stretching device according to the present invention, Figure 3 is a partially enlarged perspective view of the vertical stretching device, Figure 4 is a perspective view showing a coupling relationship between the spring rope and the lifting gear, Figure 5 is a lifting unit ( 120 and 130 are detailed perspective views.

2 and 3, the rope drum housing 100 is, for example, a sealed container in which a connector 101 is formed at one side and a discharge hole 104 is formed at an upper center thereof. As shown in FIG. 1, the cable 225 is exposed from the connector 101 of the housing 100 and connected to the control unit 110.

One end of the spring rope 102 is fixed to the connector 101 and is stacked in the shape of a rope in the rope drum housing 100 so that the other end is discharged through the discharge hole 104, and the other end thereof is movable by the bracket 222. It is fixed to the tube 220. At this time, the guide tube 138 is formed on the outside of the discharge hole 104, the spring rope 102 is discharged through the guide tube 138 inside, which will be described later.

The spring rope 102, as described above, is fixed to the bracket 222 installed in the form of a plug on the lower end of the movable tube 220, and the function to lift the movable tube 220 in accordance with the lifting and lowering of the spring rope 102; In addition, a power supply and a signal line (not shown) extending from the control unit 110 therein serve as a part of a path that is connected to an application device installed on the upper portion of the movable tube 220.

Referring to FIG. 4, as indicated by A, a filament wound to form the spring rope 102 may have a triangular shape having vertices on the outer side thereof. By forming in such a shape, gear engagement with the elevating gears 136, 137 located on both sides of the spring rope 102 can be reliably and easily performed.

The control unit 110 is provided with a printed circuit board (not shown) and a power supply device in which a microprocessor for controlling each part including the rotary motors 120 of the elevating units 120 and 130 is mounted.

Lifting unit (120, 130) includes a gearbox 130 for largely converting the rotational force of the rotary motor 120 and the rotary motor 120 to be transmitted to the spring rope (102). Rotary motor 120, for example, a BLDC motor capable of forward and reverse rotation may be applied.

Referring to FIG. 5, the inner bottom of the gearbox 130 is formed with an insertion hole 135 corresponding to the discharge hole 104 of the rope drum housing 100, and a guide tube 138 in the insertion hole 135. It is coupled to the upper portion and protrudes outward the upper gearbox 130, the protruding portion is fixed to the gearbox 130 by a flange ring (138a).

Openings 139 are formed at portions opposite to each other at an intermediate position of the guide tube 138, and gear coupling with the spring rope 102 with the lifting gears 136, 137 partially inserted into the openings 139, This is shown in detail in FIG. 4.

Inside the gearbox 130, the gear 131 coupled to the motor shaft of the rotary motor 120, the worm gear 132, the worm gear 132 and gear coupling coupled to the gear 131 to change the rotation direction Lifting gear 136 is installed on the first rotating shaft to rotate, and the lifting gear 137 is provided on the second rotating shaft which is rotated in gear coupling with the first rotating shaft, respectively. The first and second rotation shafts are always rotated together by gears 134 and 134a fixed to the first and second rotation shafts meshing with each other to rotate.

Here, the gear coupling structure shown in Figure 5 is only one embodiment, of course, other modifications are possible. For example, worm gears and the like may be omitted by providing rotary motors corresponding to the first and second rotary shafts, respectively. Unlike FIG. 5, the worm gears may be directly connected to the first or second rotary shafts. And the like can be omitted.

Referring to FIG. 4, the lifting gears 136 and 137 are gear-coupled with the spring ropes 102 on opposite sides to raise or lower the spring ropes 102 in accordance with the rotation directions of the lifting gears 136 and 137. For example, as indicated by the arrows in FIG. 4, when the elevating gears 136, 137 rotate, the spring rope 102 rises, and vice versa, the spring rope 102 descends. Of course, the gear shape of the elevating gears 136, 137 corresponds to the cross-sectional shape of the wound filament of the spring rope 102.

2 and 3, the fixing tube 200 is fixed to the bottom of the gearbox 130 is installed. Referring to FIG. 6, which shows the fixed tube 200, a support ring 201 is fitted along the bottom inner side. In addition, the upper end of the ring-shaped flange 203 is fitted, covering the top surface of the fixed tube 200 is installed so as to project slightly than the inside of the fixed tube 200. Inside the flange 203, a rubber packing 205 for contacting and sealing the surface of the inner extension tube 210 and a packing support ring 204 for fixing and supporting the rubber packing 205 are installed.

A plurality of guide grooves 208 are formed at regular intervals along the inner surface of the flange 203, the rubber packing 205, and the entire packing support ring 204, which is a guide rail of the extension tube 210 to be described later It guides the slide.

In addition, the sensor 206 is installed on one side of the surface of the flange 203, the sensor 207 is installed on the back surface corresponding thereto. The detection sensor 206 pairs with the sensing element 227 (see FIGS. 2 and 8) installed on the rear surface of the flange 223 of the movable tube 220 to detect the lower limit of the extension tube 210, and the detection sensor Reference numeral 207 detects an upper limit of the extension tube 210 in pairs with the sensing element 217 (see FIG. 7) provided at the lower end of the extension tube 210.

Preferably, as the sensing sensors 206 and 207, a proximity sensor including a high frequency oscillation type, a capacitive type, or a magnetic lead type may be applied. In this embodiment, the magnetic lead type is used as an example, and the sensing sensors 206 and 207 become conductor elements and the sensing elements 217 and 227 become magnet elements.

In order to protect the conductive wires connected to the detection sensors 206 and 207, a flat tube 202 may be installed in the height direction on the outer surface of the fixing tube 200.

7 is a view showing an extension tube.

An extension tube 210 is fitted inside the fixed tube 200, and whether the extension tube 210 is applied or not is optional.

The extension tube 210 also has a structure similar to the fixed tube 200 basically, and a support ring 211 is installed inside the bottom, and the support ring 211 is placed on the support ring 201 of the fixed tube 200. Slightly outwardly.

A plurality of guide rails 219 extending vertically over the entire height direction are provided on the outer surface of the extension tube 210. As described above, the guide rail 219 guides the movement while preventing the extension tube 210 from being rotated when the elevating tube 210 is inserted into the guide groove 208 formed in the flange 203 of the fixed tube 200. It plays a role.

The upper end of the ring-shaped flange 213 is fitted, it is installed so as to protrude slightly than the inner side of the extension tube 210. Inside the flange 213, a rubber packing 215 for contacting and sealing the surface of the movable tube 220 therein and a packing support ring 214 for fixing the rubber packing 215 are installed.

In addition, as described above, a plurality of guide grooves 218 are formed at regular intervals along the inner surface of the flange 213, the rubber packing 215, and the entire packing support ring 214, which is a movable tube to be described later The guide rail of 220 serves to guide the slide.

On the other hand, as described above, when the sensing element 217 is installed on the outer surface near the lower end and the extension tube 210 reaches the upper limit during the rising, the sensing object approaching the sensing sensor 207 of the fixed tube 200 is approached. Device 217 is sensed to indicate that an upper limit has been reached.

8 is a view showing a movable tube.

The movable tube 220 is fitted inside the extension tube 210. As described above, a support ring 221 is installed inside the lower end of the movable tube 220, and the support ring 221 slightly protrudes outward so as to rest on the support ring 211 of the extension tube 210. In addition, a bracket 222 having a through hole is installed at the center of the support ring 221 so that the end of the spring rope 102 is fitted into the bracket 222 to be fixed.

The outer side surface of the movable tube 220 is provided with a plurality of guide rails 228 extending vertically throughout the height direction. As described above, the guide rail 228 guides the movement while preventing the movable tube 220 from being rotated when the elevating tube 220 is inserted into the guide groove 218 formed in the flange 213 of the extension tube 210. It plays a role.

Further, the stopper 229 protrudes along the circumferential direction between the guide rails 228 adjacent to each other near the lower end of the outer surface of the movable tube 220. According to this structure, the stopper 229 guides the flange 213 while the guide rail 228 is guided and slides by the guide groove 218 of the extension tube 210 when the movable tube 220 is raised. It is caught between the parts 218 and thus the extension tube 210 is pulled up by the movable tube 220.

The upper end of the movable tube 220 is fitted with a disc-shaped flange 223 having a through hole in the center, the rear of the movable tube 220 is installed with a cable fixing bracket 224 for fixing the cable 225 accommodated in the movable tube 220. . An end of the cable 225 fixed to the cable fixing bracket 224 is coupled to the connector 226 for connection with the application. The cable 225 extends through the spring rope 102 from the other end of the spring rope 102 fixed to the bracket 222 while being wound to secure a sufficient length in the movable tube 220 to allow the rope drum housing 100 to extend. It is discharged through the connector 101 of and extends to the control unit 110 (see FIG. 1).

On the other hand, the sensing element 227 is installed on the rear edge of the flange 223, as described above, the detection sensor 206 of the fixed tube 200 detects this and the movable tube 220 has reached the lower limit. Inform.

The upper portion of the flange 223 may be equipped with a variety of applications, such as a transmission and reception antenna, a camera for shooting or observation equipment.

The operation of the vertical stretching device having this structure will be described.

First, when it is to be extended upward, when the power is applied to the rotary motor 120 to forward rotation, the rotational force of the rotary motor 120 is the gear 131 in the gearbox 130-worm gear 132-worm gear The lifting gear 136 is rotated by sequentially rotating the gear 133 coupled with the 132, and the lifting gear 137 is rotated by rotating the gear 134-the gear 134a in turn.

As a result, as illustrated in FIG. 4, the spring rope 102 geared to the lifting gears 136 and 137 is raised.

At this time, since the spring rope 102 is fixed to the movable tube 220 through the bracket 222, the movable tube 220 rises as the spring rope 102 rises.

When the movable tube 220 is raised, the guide tube 228 protruding on the outer surface of the movable tube 220 is guided and slides in a state of being fitted into the guide groove 218 of the extension tube 210. ), The stopper 229 is caught between the flange 213 guide groove 218 of the extension tube 210 so that the extension tube 210 is pulled up by the movable tube 220.

Subsequently, while the extension tube 210 rises together with the movable tube 220, the sensing element 217 installed near the lower end of the extension tube 210 approaches the detection sensor 207 of the fixed tube 200. In other words, when the extension tube 210 almost reaches the upper limit, the detection sensor 207 of the fixed tube 200 detects the sensing element 217 to indicate that the extension tube 210 approaches the upper limit. Notify the control unit 110.

Accordingly, the control unit 110 stops the rotation of the rotary motor 120 to stop the rise of the spring rope (102).

In this way, the vertical stretching device can be stretched to the maximum, and if necessary, the power supply can be stopped by manually shutting off the power in a state in which it is extended by a desired height.

When descending, when the rotary motor 120 reversely rotates so that the spring rope 102 descends, the movable tube 220 connected to the spring rope 102 descends first, and when the lower limit is reached, the movable tube 220 falls. The lower support ring 221 contacts the support ring 211 at the bottom of the extension tube 210 to apply pressure. Accordingly, the extension tube 210 descends together with the movable tube 220.

While the movable tube 220 is being lowered together with the extension tube 210, when the extension tube 210 reaches the lower limit, the sensing sensor 206 of the fixed tube 200 may detect a sensing element of the movable tube 220. When the controller 227 detects the signal 227 and notifies the control unit 110, the control unit 110 cuts the power to stop the rotation of the rotary motor 120.

Although the above has been described with reference to the embodiments of the present invention, various modifications are possible at the level of those skilled in the art.

1) In the above embodiment, a structure in which the fixed tube, the extension tube, and the movable tube are sequentially stacked is illustrated as an example. However, the present invention is not limited thereto.

2) The number of extension tubes applied can be adjusted accordingly.

3) The length, material, and diameter of the spring rope may be appropriately modified depending on the installation environment.

Therefore, the scope of the present invention should not be limited to the above-described embodiment, but should be interpreted by the claims described below.

1 is a view showing the appearance of a vertical stretching apparatus according to an embodiment of the present invention.

2 is a vertical cross-sectional view showing a vertical stretching apparatus according to the present invention.

3 is a partially enlarged perspective view of the vertical stretching device.

4 is a perspective view illustrating a coupling relationship between a spring rope and a lifting gear.

5 is a perspective view illustrating the lifting units 120 and 130 in detail.

6 is a cutaway perspective view of the fixing tube.

7 is a cutaway perspective view of the extension tube;

8 is a cutaway perspective view of the movable tube;

Claims (13)

A rope drum housing accommodating a spring rope having a power and signal supply cable therein; An elevating unit installed on the rope drum housing and configured to raise or lower the spring rope; A control unit for controlling driving of the lifting unit; A fixed tube fixedly installed on the elevating unit; And It is slidably fitted inside the fixed tube, the end of the spring rope is fixed to the bottom, and includes a movable tube extending through the inside fixed to the top, An application device is detachably installed on the movable tube, When the spring rope is raised by the elevating unit, the spring rope housed in the rope drum housing is supplied to the elevating unit side. When the spring rope is lowered by the elevating unit, the spring rope is moved. Is housed in the form of a wheel in the rope drum housing, And the movable tube is raised or lowered when the spring rope is lifted. A rope drum housing accommodating a spring rope having a power and signal supply cable therein; An elevating unit installed on the rope drum housing and configured to raise or lower the spring rope; A control unit for controlling driving of the lifting unit; A fixed tube fixedly installed on the elevating unit; At least one extension tube slidably fitted inside the fixed tube; And It is slidably fitted inside the extension tube, the end of the spring rope is fixed to the lower end, and includes a movable tube extending through the inside fixed to the upper end, An application device is detachably installed at the top of the movable tube, When the spring rope is raised by the elevating unit, the spring rope housed in the rope drum housing is supplied to the elevating unit side. When the spring rope is lowered by the elevating unit, the spring rope is moved. Is housed in the form of a wheel in the rope drum housing, When the spring rope is elevated the movable tube is raised or lowered, And said extension tube is elevated relative to said movable tube. The method according to claim 1 or 2, The lifting unit, Rotary motor; A first elevating gear installed on a first rotating shaft which receives and rotates the rotational force of the rotary motor; And And a second elevating gear installed on the second rotating shaft to receive the rotational force of the first rotating shaft, And the spring rope is positioned between the first and second lift gears so that the first and second lift gears and the spring rope are gear-coupled. The method according to claim 3, The first rotation shaft is a vertical stretching device, characterized in that for receiving a rotational force from the worm gear for changing the rotation direction of the rotary motor. The method according to claim 1 or 2, Vertical cross-section of the filament wound to form the spring rope is characterized in that the triangular shape having a vertex on the outer side. The method according to claim 1, Upper and lower limit sensors are installed at the top of the fixed tube, respectively. In response to this, the upper and lower limit sensing elements are installed at the lower and upper ends of the movable tube, respectively. The method according to claim 2, Upper and lower limit sensors are installed at the top of the fixed tube, respectively. In response thereto, the upper and lower limit sensing elements are installed at the lower end of the extension tube and the upper end of the movable tube, respectively. The method according to claim 6 or 7, The sensing sensor is a vertical stretching device, characterized in that the proximity sensor. The method according to claim 1, The upper end of the movable tube is provided with a disk-shaped flange having a through hole for fixing the application device, the upper end of the fixed tube is provided with a ring-shaped support flange for supporting the lifting of the movable tube, A plurality of guide rails protruding in the height direction on the outer surface of the movable tube, the vertical extension device, characterized in that the guide grooves are respectively received in the support flange of the fixed tube. The method according to claim 9, The cable is fixed to the cable fixing bracket installed on the back of the disk-shaped flange, the connector for the connection with the application device is coupled to the end of the cable, the connector is characterized in that exposed through the through hole Vertical stretching device. The method according to claim 2, The upper end of the movable tube is provided with a disk-shaped flange having a through hole for fixing the application device, the upper end of the extension tube and the fixed tube ring-shaped support flange for supporting the lifting of the movable tube and the extension tube, respectively Is installed, A plurality of guide rails protrude from the outer surface of the movable tube in the height direction, and guide grooves for receiving the guide rails are formed inside the support flange of the fixed tube, respectively. A stopper protrudes in a circumferential direction from the lower end of the movable tube to the portion between the guide rails, and the stopper is caught by an inner end of the support flange of the extension tube so that the extension tube rises as the movable tube rises. Vertical stretching device. The method according to claim 11, And a support ring is installed along the lower end of the movable tube and the extension tube, respectively, and the extension tube descends as the movable tube descends by the contact of the support ring. A rope drum housing accommodating a spring rope having a power and signal supply cable therein; A lifting unit including a rotation motor installed on the rope drum housing and a gear array configured to transfer the rotational force of the rotary motor to the spring rope as a lifting force; A control unit for controlling driving of the lifting unit; A fixed tube fixedly installed on the elevating unit; At least one extension tube slidably fitted inside the fixed tube; And It is slidably fitted inside the extension tube, the end of the spring rope is fixed to the lower end, and includes a movable tube extending through the inside fixed to the upper end, When the spring rope is raised by the elevating unit, the spring rope housed in the rope drum housing is supplied to the elevating unit side. When the spring rope is lowered by the elevating unit, the spring rope is moved. Is housed in the form of a wheel in the rope drum housing, The spring rope is lifted by gear coupling with a pair of opposing lift gears of the gear array, When the spring rope is elevated the movable tube is raised or lowered, And said extension tube is elevated relative to said movable tube.

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