KR20160115605A - Overload prevention apparatus for gondola and control method thereof - Google Patents

Overload prevention apparatus for gondola and control method thereof Download PDF

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Publication number
KR20160115605A
KR20160115605A KR1020150043620A KR20150043620A KR20160115605A KR 20160115605 A KR20160115605 A KR 20160115605A KR 1020150043620 A KR1020150043620 A KR 1020150043620A KR 20150043620 A KR20150043620 A KR 20150043620A KR 20160115605 A KR20160115605 A KR 20160115605A
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KR
South Korea
Prior art keywords
load
unit
wire rope
driving
wire
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Application number
KR1020150043620A
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Korean (ko)
Inventor
김윤호
Original Assignee
주식회사 경성기업
김윤호
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Application filed by 주식회사 경성기업, 김윤호 filed Critical 주식회사 경성기업
Priority to KR1020150043620A priority Critical patent/KR20160115605A/en
Publication of KR20160115605A publication Critical patent/KR20160115605A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
    • B66B9/16—Mobile or transportable lifts specially adapted to be shifted from one part of a building or other structure to another part or to another building or structure
    • B66B9/187—Mobile or transportable lifts specially adapted to be shifted from one part of a building or other structure to another part or to another building or structure with a liftway specially adapted for temporary connection to a building or other structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
    • B66B13/24—Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/28—Mobile scaffolds; Scaffolds with mobile platforms

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Transportation (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

The present invention relates to an overload prevention apparatus for a gondola and a control method thereof. The overload prevention apparatus for a gondola comprises: a measurement unit which is installed on wire ropes connected to a cage and measures a weight acting on each wire rope; a drive unit to generate a drive force for lifting the wire ropes; and a control unit to add each weight measured by the detection unit to calculate an overall weight of a loaded object, and determine whether an overload occurs based on the calculated overall weight to control drive of the drive unit. A load cell is installed on each wire rope connected to the cage to measure the weight acting on each wire rope in real time to accurately determine an overload state to prevent an accident caused by driving in an overload state.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gondola overload prevention apparatus,

The present invention relates to a gondola overload prevention apparatus and a control method thereof, and more particularly, to a gondola overload prevention apparatus and a control method thereof for preventing a gondola overload operation in which a load of a gondola is detected, ≪ / RTI >

Generally. Gondola is installed on the roof of an apartment or a high-rise building and is a mechanical device that lifts and lowers the cargo loaded in the cage.

The gondola is constructed so that when the drum is rotated by the driving motor of the main body, the wire rope is wound or unwound on the drum to move up and down the cage supported at the wire rope end.

On the other hand, the gondola restricts the maximum load of the cargo loaded on the cage in consideration of the capacity of the drive motor, the strength of the wire rope and the parts supporting it, thereby preventing a safety accident such as fall due to overload.

For example, Patent Document 1 below discloses a gondola overload prevention apparatus configuration according to the prior art.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of a gondola overload prevention device according to Patent Document 1. FIG.

As shown in Fig. 1, Patent Document 1 has a movable roller portion 2 for supporting a main wire 1 of a gondola and a sensing means 3 for sensing the position of the movable roller portion 2, The roller unit 2 is horizontally movable by the tension of the wire rope 1 and the sensing unit 3 is composed of a photosensor that senses the movement of the movable roller unit 2, Which detects the position of the gondola, and improves the accuracy of load detection and prevents malfunctions.

Korean Utility Model No. 20-2012-0007396 (published on October 26, 2012)

However, in Patent Document 1, since the load acting on the wire rope 1 is sensed by sensing the horizontal movement position of the support frame 5 supported by the elastic body 4 provided by the compression spring, the accuracy of the result of sensing the load And there is a problem that the deviation of the detection value occurs severely.

Patent Document 1 discloses a structure in which a movable roller portion 2 that horizontally moves according to a load acting on each wire rope 1 and a sensing means 3 that detects the position of the movable roller portion 2 are separated from each other by a predetermined interval The construction of the gondola overload prevention device is complicated and the manufacturing cost is increased due to an increase in the number of parts.

Also, according to Patent Document 1, as loads applied to two wire ropes 1 are individually sensed, there is a problem that an overload state can not be accurately detected when an offset load occurs.

Therefore, it is required to develop a technology that can accurately detect the weight of the load placed on the cage and prevent the operation in the overload state even if the offset load occurs in the two wire ropes.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gondola overload prevention device and a control method thereof that can prevent a load from being overloaded by measuring a load of a load placed on a gondola .

Another object of the present invention is to provide a gondola overload prevention device and a control method thereof that can accurately measure a total load even when an offset load occurs in two wire ropes and prevent a safety accident due to an operation in an overload state .

In order to achieve the above object, a gondola overload prevention device according to the present invention is characterized by comprising: a measuring unit installed on each wire rope connected to a cage and measuring a load acting on each wire rope; And a control unit for calculating the total load of the load by summing the loads detected by the sensing unit and determining whether overload is generated based on the calculated total load to control the driving of the driving unit .

The measuring unit includes first and second load cells for measuring loads acting on two wire ropes, respectively.

The measuring unit may include a pair of guide rollers spaced apart from the upper and lower ends of the pair of housings, respectively, on which the first and second load cells are installed, for guiding the elevating operation of the wire rope, And a support frame rotatably and axially coupled to the rotary rope, wherein the rotary roller and the support frame are horizontally movable in accordance with a load acting on the wire rope, And the first load cell or the second load cell is pressurized.

The wire guide may further include a wire guide for guiding the wire rope inserted into the housing, wherein the upper and lower ends of the wire guide are arranged in a vertical direction, As shown in FIG.

The control unit may include a calculating unit that calculates a total load of the load by summing the loads measured in the first and second load cells, a comparison unit that compares the total load calculated in the calculating unit with a maximum stored load, And a signal generating unit for generating a control signal to drive or stop the driving motor provided in the driving unit based on the comparison result of the driving unit. When the load of the load is reduced below the maximum loading weight after the driving motor is stopped And the drive motor is controlled to be driven again.

The present invention further includes a remote controller for inputting an operation command of an operator and a display unit provided on the remote controller for displaying a total load and an overload state of the load provided from the controller.

In order to achieve the above object, a method of controlling a gondola overload prevention apparatus according to the present invention comprises the steps of: (a) measuring a load acting on each wire rope by using a load cell installed on each wire rope connected to a cage; (B) calculating the total load of the load by summing the loads measured by the respective units in the control unit, (c) comparing the total load with a pre-stored maximum load, and ) Controlling the driving of the driving motor to generate a driving force to raise and lower the wire rope according to the comparison result of the comparing unit.

In the step (a), the first and second load cells provided in the respective housings provided on the respective wire ropes receive the pressing force of the supporting frame and the rotating rollers, which move horizontally according to loads acting on the respective wire ropes, And the load acting on the load is measured.

Wherein the control unit controls the drive motor to stop driving when the total load exceeds the maximum load, and after the driving of the drive motor is stopped, (A) to (c) so as to drive the driving motor again.

The present invention further includes the step of (e) guiding the load and the overload state of the load through the display unit provided on the remote controller.

As described above, according to the gondola overload prevention apparatus and control method of the present invention, a load cell is installed on each wire rope connected to a cage to measure a load applied to each wire rope in real time, It is possible to obtain an effect of accurately judging.

Thus, according to the present invention, even if an offset load occurs in which a load is concentrated on any one wire rope, an overload state is determined according to the total load calculated by summing the loads measured by the load cells, It is possible to obtain an effect of preventing in advance.

Further, according to the present invention, it is possible to increase the convenience of use and improve the overload prevention effect by guiding the operator through the display unit provided in the remote controller in real time whether or not the load and the overload occur in real time.

1 is a block diagram of a gondola overload prevention apparatus according to the prior art,
2 is a block diagram of a gondola overload prevention device according to a preferred embodiment of the present invention;
3 is a configuration diagram of the measuring unit shown in FIG. 2,
4 is a cross-sectional view taken along the line A-A 'shown in Fig. 3,
FIG. 5 is a flowchart illustrating steps of controlling a gondola overload prevention apparatus according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a gondola overload prevention apparatus and a control method thereof according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a gondola overload prevention apparatus according to a preferred embodiment of the present invention.

As shown in FIG. 2, the gondola overload prevention device 10 according to the preferred embodiment of the present invention includes a measurement unit 20 (not shown) installed in each of two wire ropes and measuring a load acting on each wire rope 11 ), A driver 30 for generating a driving force for raising and lowering the wire rope, and the loads detected by the sensing unit 30 are summed to calculate a total load. Based on the calculated loads, (Not shown).

The measuring unit 20 may include first and second load cells 11 for measuring loads acting on two wire ropes, respectively.

The detailed configuration of the measuring unit 20 will be described in detail below with reference to Figs. 3 and 4. Fig.

The driving unit 30 includes a drum (not shown) rotatably installed to wind or loosen a wire rope and a driving motor (not shown) driven in accordance with a control signal of the control unit 40 and generating driving force to rotate the drum Time).

The control unit 40 includes a calculation unit 41 for calculating the total load by summing the respective loads measured by the first and second load cells 21 and 22, a total load calculated by the calculation unit 41, And a signal generating unit 43 for generating a control signal for driving or stopping the driving unit 30 according to the comparison result of the comparing unit 42 and the comparing unit 42. [

The control unit 40 is a central control unit for controlling the driving of each device provided in the gondola. The control unit 40 judges whether the load is overloaded due to the overload of the load placed on the cage by using the calculated total load, The driving of the driving unit can be stopped.

As described above, according to the present invention, a load cell is installed on each wire rope connected to the cage, and the load acting on each wire rope is measured in real time to accurately determine whether or not the wire is overloaded.

Particularly, the present invention can prevent a safety accident such as a fall by determining an overload state according to the total load calculated by summing the loads measured by the load cells, even if a deflected load is concentrated on a wire rope Can be prevented.

The configuration of the measuring unit will be described in detail with reference to Figs. 3 and 4. Fig.

FIG. 3 is a configuration diagram of the measuring unit shown in FIG. 2, and FIG. 4 is a sectional view taken along the line A-A 'shown in FIG.

3 and 4, the measuring unit 20 may be installed inside the housing 23 installed in the two wire ropes 11, respectively.

Hereinafter, the structure of the inside of the housing 23 in which the first and second load cells 21 and 22 are installed is the same as that of the housing 20 in which the first load cell 21 is installed.

The measuring section 20 may include a pair of guide rollers 24, a rotating roller 25, a support frame 26 and a first load cell 21 (or a second load cell 22).

For example, the housing 23 is formed in a substantially rectangular parallelepiped shape, and a through hole through which the wire rope 11 is drawn and drawn out can be formed on the upper and lower ends of the housing 23, respectively.

The pair of guide rollers 24 are spaced apart from the upper and lower ends of the inside of the housing 23 and serve to guide the elevating operation of the wire rope 11.

Between the pair of guide rollers 24, there can be provided a wire rope 11 on one side, and a rotating roller 25 for pressing on the left side as viewed in Fig.

The rotary roller 25 is rotatably shaft-connected to the end of the support frame 26 to press the wire rope 11 on the side.

The rotary roller 25 and the support frame 26 may be installed so as to be movable in the horizontal direction according to the load acting on the wire rope 11.

That is, as the load of the load increases, the rotary roller 25 and the support frame 26 horizontally move toward the first load cell 21 as the wire rope 11 is deformed closer to a straight line.

On the other hand, as the load of the load decreases, the rotary roller 25 and the support frame 26 horizontally move in the left direction as the wire rope 11 is bent and deformed toward the left side wall of the housing.

4, the support frame 26 is formed to have a substantially 'C' -shape in cross section when viewed from the upper surface thereof, and is formed on one side of the support frame 26, for example, And the first load cell 21 (or the second load cell 22) may be in contact with the right end.

Accordingly, the first and second load cells 21 and 22 can accurately measure the load acting on each wire rope 11 by measuring the pressing force transmitted through the horizontal movement of the support frame 26, respectively.

Meanwhile, the first and second load cells 21 and 22 may be communicably connected to the controller 40 through a cable.

The present invention can be applied to a communication module (not shown) that transmits measurement signals of the first and second load cells 21 and 22 to the controller 40 to the measuring unit 20, And may be changed so as to communicate with the control unit 40 in a wireless communication manner.

The measuring unit 20 may further include a wire guide 27 for guiding the wire rope 11 inserted into the housing 23.

3 and the central portion of the wire guide 27 corresponds to the outer circumferential surface of the rotary roller 25 so that the upper end portion and the lower end portion of the wire guide 27 are arranged in the vertical direction as shown in Fig. So that it can be bent.

An insertion hole into which the wire rope 11 is inserted may be formed at a portion where the upper end and the center portion of the wire guide 27 are connected and at a portion where the lower end portion and the center portion of the wire guide 27 are connected.

Next, a control method of the gondola overload prevention apparatus according to the preferred embodiment of the present invention will be described in detail with reference to FIG.

5 is a flowchart illustrating steps of controlling a gondola overload prevention apparatus according to a preferred embodiment of the present invention.

If the load is loaded on the cage in step S10 of FIG. 5, the first and second load cells 21 and 22 provided on the respective wire ropes 11 connected to the cage measure the load acting on each wire rope 11 .

More specifically, the rotary rollers 25 in the housing 23 provided in the respective wire ropes 11 horizontally move in accordance with the load acting on the wire rope 11.

At this time, the first and second load cells 21 and 22 can accurately measure a load acting on each wire rope 11 by using the pressing force transmitted through the support frame 26, respectively.

The calculation unit 41 of the control unit 40 receives the measurement signals of the loads measured by the first and second load cells 21 and 22 and calculates the respective loads measured by the first and second load cells 21 and 22 And the total load is calculated (S12).

Then, in step S14, the comparing unit 42 compares the calculated total load with the maximum stored load previously stored.

When the calculated total load exceeds the maximum load, the signal generating unit 43 generates a control signal to stop driving the driving motor provided in the driving unit 30 (S16).

Thereafter, the control unit 40 may control the operator to proceed to step S10 to re-drive the gondola if the load of the load is changed by discharging a part of the loads loaded on the cage.

As described above, according to the present invention, the load acting on two wire ropes is summed to determine whether or not the vehicle is overloaded by comparing with the maximum load, and driving of the driving motor is stopped in an overload state, Can be prevented.

On the other hand, if the result of step S14 and the calculated total load are less than the maximum load, the signal generator 43 generates a control signal to drive the driving motor (S18).

Thus, the cage can move up and down to transport the load in the vertical direction.

In step S20, the control unit 40 checks whether or not the gondola operation stop command is inputted by the user after the operation using the gondola is completed, and controls to repeat steps S10 to S20 until the gondola operation stop command is inputted have.

If the gondola operation stop command is input in step S20, the control unit 40 stops the operation of the gondola overload prevention device and the gondola, and terminates the operation.

Through the above-described process, the present invention can be applied to a case in which the load acting on two wire ropes is summed to determine whether the overload state is compared with the maximum load, and the drive motor is stopped in an over- Safety accidents can be prevented in advance.

Meanwhile, in the present embodiment, the function of driving or stopping the drive motor is determined by comparing the total load of the gondola with the maximum load and judging whether the gondola is overloaded. However, the present invention is not limited thereto.

That is, the gondola overload prevention device according to another embodiment of the present invention further includes a remote controller (not shown) for receiving an operation command of an operator to drive the gondola, and the remote controller has an operation button (Not shown) and a display unit (not shown) for indicating whether or not the calculated total load and the overload state are provided.

The remote controller can be connected to the control unit 40 in a communicable manner via a wired communication system via a cable or a wireless communication system.

The display unit may include a 7-segment display panel or a display panel to indicate whether the load is overloaded or overloaded.

Of course, the display unit may be changed to include LED lamps that are turned on in different colors depending on whether the battery is overloaded or not.

Accordingly, the present invention can guide the operator in real time about the load of the load and whether the load is overloaded, thereby improving convenience in use and improving the overload prevention effect.

Although the invention made by the present inventors has been described concretely with reference to the above embodiments, the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

The present invention is applied to a technique of preventing an overloaded state operation of a gondola by judging whether or not a load placed on a cage is overloaded according to a total load obtained by summing loads acting on each wire rope.

10: Gondola Overload Protection Device
11: wire rope 20: measuring part
21, 22: first and second load cells 23: housing
24: guide roller 25: rotating roller
26: support frame 27: wire guide
30: driving unit 40:
41: calculating section 42: comparing section
43: Signal generator

Claims (10)

A measuring part installed in each wire rope connected to the cage and measuring a load acting on each wire rope,
A driving part for generating a driving force for raising and lowering the wire rope, and
And a control unit for calculating the total load of the load by summing the loads detected by the sensing unit and determining whether overload is generated based on the calculated total load to control driving of the driving unit. Prevention device. The method according to claim 1,
Wherein the measuring unit includes first and second load cells for measuring loads acting on two wire ropes, respectively. The apparatus according to claim 2, wherein the measuring unit
A pair of guide rollers spaced apart from each other at an upper end and a lower end of a pair of housings in which the first and second load cells are respectively installed,
A rotating roller provided between the pair of guide rollers for pressing the wire rope in one direction and
Further comprising a support frame to which the rotary roller is rotatably axially coupled,
Wherein the rotating roller and the support frame are horizontally movable in accordance with a load acting on the wire rope so as to press the first load cell or the second load cell. The method of claim 3,
The measuring unit may further include a wire guide for guiding a wire rope inserted into the housing,
The upper and lower ends of the wire guide are arranged in a vertical direction,
And the central portion of the wire guide is bent to one side so as to correspond to the shape of the outer circumferential surface of the rotating roller. 5. The apparatus according to any one of claims 2 to 4, wherein the control unit
A calculation unit for calculating a total load of the load by summing the loads measured in the first and second load cells,
A comparing unit for comparing the total load calculated by the calculating unit with a maximum stored load which is stored in advance;
And a signal generating unit for generating a control signal to drive or stop the driving motor provided in the driving unit based on the comparison result of the comparing unit,
And controls the drive motor to be driven again when the load of the load decreases to be less than the maximum load weight after the drive motor stops driving. 6. The method of claim 5,
A remote controller for inputting an operation command of the operator and
Further comprising a display unit provided on the remote controller for displaying a total load and an overload state of the load provided from the control unit. (a) measuring a load acting on each wire rope using a load cell installed on each wire rope connected to the cage,
(b) calculating a total load of the load by summing the loads measured by the calculation units provided in the control unit,
(c) comparing the total load with a pre-stored maximum load at the comparing unit, and
(d) controlling driving of a driving motor that generates a driving force to raise and lower the wire rope according to the comparison result of the comparison unit. 8. The method of claim 7,
In the step (a), the first and second load cells provided in the respective housings provided on the respective wire ropes receive the pressing force of the supporting frame and the rotating rollers, which move horizontally according to loads acting on the respective wire ropes, And the load acting on the gondola overload prevention device is measured. 9. The method according to claim 7 or 8,
Wherein the step (d) controls the drive motor to stop driving when the total load exceeds the maximum load,
Wherein the control unit repeatedly performs the steps (a) to (c) so as to re-drive the drive motor when the load of the load is reduced after the drive of the drive motor is stopped. A method of controlling a device. 10. The method of claim 9,
(e) a step of informing the load and overload state of the load through the display unit provided on the remote controller.
KR1020150043620A 2015-03-27 2015-03-27 Overload prevention apparatus for gondola and control method thereof KR20160115605A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108360809A (en) * 2018-02-02 2018-08-03 北京润博同创科技有限公司 A kind of wall-attached construction lifting platform
KR102107753B1 (en) * 2019-06-20 2020-05-07 주식회사 선진곤도라 Apparatus for smart installation work for overload prevention using data
KR20210011829A (en) * 2019-07-23 2021-02-02 주식회사 선진알씨에스 IOT(internet of things) applicable climbing rail of climbing system for building wall construction

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120007396U (en) 2011-04-18 2012-10-26 현대중공업 주식회사 Overload prevention apparatus for gondola

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120007396U (en) 2011-04-18 2012-10-26 현대중공업 주식회사 Overload prevention apparatus for gondola

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108360809A (en) * 2018-02-02 2018-08-03 北京润博同创科技有限公司 A kind of wall-attached construction lifting platform
KR102107753B1 (en) * 2019-06-20 2020-05-07 주식회사 선진곤도라 Apparatus for smart installation work for overload prevention using data
KR20210011829A (en) * 2019-07-23 2021-02-02 주식회사 선진알씨에스 IOT(internet of things) applicable climbing rail of climbing system for building wall construction

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