KR20110037498A - Safety device of aerial lift truck - Google Patents

Safety device of aerial lift truck Download PDF

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Publication number
KR20110037498A
KR20110037498A KR1020090094973A KR20090094973A KR20110037498A KR 20110037498 A KR20110037498 A KR 20110037498A KR 1020090094973 A KR1020090094973 A KR 1020090094973A KR 20090094973 A KR20090094973 A KR 20090094973A KR 20110037498 A KR20110037498 A KR 20110037498A
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KR
South Korea
Prior art keywords
boom
sensor
length
post
frame
Prior art date
Application number
KR1020090094973A
Other languages
Korean (ko)
Inventor
고재필
Original Assignee
고재필
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 고재필 filed Critical 고재필
Priority to KR1020090094973A priority Critical patent/KR20110037498A/en
Publication of KR20110037498A publication Critical patent/KR20110037498A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/16—Applications of indicating, registering, or weighing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C15/00—Safety gear
    • B66C15/06—Arrangements or use of warning devices
    • B66C15/065—Arrangements or use of warning devices electrical

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

Abstract

PURPOSE: A safety device of a high place operation car is provided to improve working speed and workability since an operator works in a relaxed condition. CONSTITUTION: A safety device of a high place operation car comprises a boom angle sensor(33), a boom rotation angular sensor(32), a boom length sensor(34), a load sensor, an outrigger length sensor(31) and a controller. The boom angle sensor is mounted on the boom in order to measure the horizontality angle of the boom of the frame. The boom rotation angular sensor is installed at the boom in order to measure the rotation angle of the boom. The boom length sensor is installed to the boom in order to measure the elasticity length of the boom. The load sensor is mounted on a basket of truck crane(20) in order to measure the load of the basket. The outrigger length sensor measures the projection length of the outrigger which is projected in order to support the frame to the ground. The controller controls the operation of a high place operation car by comparing an operate moment to a support moment.

Description

Safety device for aerial work vehicle {SAFETY DEVICE OF AERIAL LIFT TRUCK}

The present invention relates to a safety device for aerial work vehicle. More specifically, the weight of the ship, the extension length of the boom and the horizontal angle of the boom are calculated to calculate the operating moment acting on the board, and the rotational angle of the boom and the extension length of the outrigger to measure the support moment acting on the outrigger. It relates to a stabilizer of the aerial vehicle to calculate the operation so that the operation can proceed in a safe state that the aerial vehicle is not overturned.

In general, the aerial work vehicle is equipped with a boarding box at the tip of the boom, a device for carrying out various tasks while moving the boarding box to an appropriate space position by lifting and contracting the operator to the boarding box. It is necessary to ensure stability by allowing the boom to be operated only within the working range where the vehicle can be rolled over during operation.

In the case of lifting the boom to the desired position like a crane and lifting the heavy object using winch and cable, there is time to prepare for the countermeasure by detecting the danger of overturning before the heavy object is lifted high above the ground. In the case of extending the boom with loads of cargo or workers, there was no time for the cargo or workers to be in a high place and take countermeasures at the moment when the risk of overturning was detected.

Prior arts related to preventing the risk of tipping over of a crane equipped with a boarding box on the boom tip and limiting the working radius include domestic patent publication 93-10230 (safety control device for aerial work vehicle) or patent registration 123902 (sue). Working radius limit system of the working vehicle).

However, the above-described conventional techniques limit the extension of the boom, but cannot cope with the weight of the cargo mounted on the board, and the safety of the outrigger, which is one of the important factors in determining the extension length of the boom, is not considered. There was a limit to securing it.

The object of the present invention devised in view of the above point is to provide a safety device for an aerial work vehicle that improves safety in consideration of the weight of the cargo mounted on the boarding board mounted at the end of the boom and the withdrawal length of the outrigger. .

Still another object of the present invention is to provide a stabilizer for an aerial vehicle to improve safety by accurately measuring the weight of cargo mounted on a board.

Safety device of the aerial vehicle for achieving the object of the present invention as described above is a boom angle sensor mounted to the boom so as to measure the horizontal angle of the boom is mounted to the frame; A boom rotation angle sensor mounted to the boom so as to measure the rotation angle of the boom; A boom length sensor mounted to the boom so as to measure the stretching length of the boom; A load sensor mounted on the board so as to measure a load on the board mounted on the front end of the boom; An outrigger length sensor for measuring a protruding length of the outrigger protruding to support the frame on the ground; And the operation moment calculated through the measured load of the boarding vessel, the elongation length of the boom and the horizontal angle of the boom, and the support moment calculated by the measured rotation angle of the boom and the elongation length of the outrigger. A control unit controlling an operation of the work vehicle; It is configured to include.

In addition, more preferably, the load detection sensor may include a first load detection sensor mounted on a connection pin connecting a bracket mounted on the lower end of the boarding board and a boarding frame mounted on the tip of the boom; And a second load sensing sensor mounted on a connection pin connecting the other end of the automatic horizontal cylinder and the bracket to which one end is mounted on the boarding frame. It is configured to include.

In addition, more preferably, the load sensor is one side is fixed to the bracket that is connected to the boom end and the other side is fixed to the lower end of the passenger compartment between the boarding bearing rotated by a hydraulic motor and the lower end of the passenger compartment It is mounted on a plurality.

In addition, more preferably, the boom is a post boom on which one end is rotatably supported on the frame; And a telescopic boom rotatably mounted at the other end of the post boom.

Further, more preferably, the boom rotation angle sensor is mounted at a point connected to the post boom and the frame, the boom angle sensor is mounted at a point where the post boom and the expansion boom is connected, the boom length A sensor is mounted to the telescopic boom.

In addition, more preferably, a post hydraulic motor mounted to the frame to rotate the post boom; A derrick cylinder having one end connected to the post boom and the other end connected to the expansion boom; And a telescope cylinder mounted inside the telescopic boom to expand and contract the telescopic boom. Is further included.

Further, more preferably, the control unit is connected to a control valve to control the operation of the post hydraulic motor, the derrick cylinder and the telescope cylinder when there is a risk of overturning the aerial work vehicle.

Further, more preferably, the control unit is connected to an alarm so as to generate an alarm sound before controlling the operation of the post hydraulic motor, the derrick cylinder and the telescope cylinder.

As described above, the safety device for aerial work vehicle according to the present invention has an effect of improving safety during operation.

In addition, since the worker can work with confidence, the work speed and workability are improved.

Hereinafter, with reference to the accompanying drawings, the safety device of the aerial work vehicle which is a preferred embodiment of the present invention will be described in detail as follows.

Figure 1 is a side view showing a aerial work vehicle, which is a preferred embodiment of the present invention, Figure 2 is a perspective view showing a passenger compartment mounting, Figure 3 is an exploded perspective view showing the disassembly of the passenger compartment mounting, Figure 4 is an operation FIG. 5 is a state diagram schematically showing a moment and a supporting moment, and FIG. 5 is a block diagram showing a controller.

As shown in the aerial work vehicle equipped with a safety device according to an embodiment of the present invention, the outrigger (3) is mounted on the frame (2) of the aerial work vehicle (1) on the left and right sides of the aerial work vehicle, respectively, to be stretchable. Support (1) on the ground. In addition, the boom 10 is rotatably mounted in the middle of the frame 2, and the boarding box 20 is mounted at the tip of the boom 10.

The outrigger 3 is equipped with an outrigger length sensor 31 that measures the length of the outrigger 3 protruding, and the load that measures the load on the boarding 20 is mounted on the boarding portion 20. The sensor 35 is mounted.

The boom 10 is hinged to the other end of the post boom 11 and the other end of the post boom 11 rotatably mounted to the frame 2 and is telescopically stretched by a telescope cylinder mounted therein. It consists of a telescopic boom 12 consisting of multiple stages. At the point where the post boom 11 and the frame 2 are connected, the boom rotation angle sensor 32 is mounted to measure an angle at which the boom 10 is rotated based on the center line of the frame 2. In addition, the piston end, which is the other end of the derrick cylinder 13 whose one end is supported by the post boom 11, is supported in the middle portion of the expansion and contraction boom 12. The boom angle sensor 33 is mounted at the connection portion where the post boom 11 and the expansion and contraction boom 12 are connected to measure the horizontal angle of the expansion and contraction boom 12. The telescopic boom 12 has a structure in which multiple stages are drawn so as to overlap each other, and the telescopic boom 12 is equipped with a boom length sensor 34 to measure the telescopic boom 12 telescopic length. The boom length sensor 34 is preferably made of a rotary distance sensor using a wire drum, the wire end of which is connected to the uppermost extension boom.

In addition, the frame 2 is equipped with a post hydraulic motor 15 to rotate the post boom 11, the derrick cylinder 13 rotates the telescopic boom 12, the tele mounted inside the telescopic boom 12 The scope cylinder 14 draws in and out the telescopic boom 12.

The boarding frame 21 is mounted at the end of the telescopic boom 12, which is the tip of the boom 10. At the end of the boarding frame 21, the bracket 22 is hinged by the connecting pin 23. In addition, one end of the automatic horizontal cylinder 24 is hinged to the boarding frame 21, and the other end of the automatic horizontal cylinder 24, the bracket 22 is hinged by the connecting pin 24.

The load sensor 35 is composed of a first load sensor 35a and a second load sensor 35b installed on each of the connecting pins 23 and 24.

The control unit 40 may receive measurement signals measured by the outrigger length sensor 31, the boom rotation angle sensor 32, the boom angle sensor 33, the boom length sensor 34, and the load sensor 35. To be connected. In addition, the control unit 40 is connected to the alarm 41 to generate an alarm signal, and is connected to the control valve 43 operated by the remote control 42 to control the operation of the control valve 43.

Referring to the process of operating the safety device of the aerial work vehicle is a preferred embodiment of the present invention configured as described above in more detail.

After the outrigger 31 is fully tensioned and supported on the ground, the operator works on the boarding vessel 20 in a state in which the boom 10 is operated and tensioned by a predetermined angle and length. As shown

The load sensing sensor 35 operates to measure the load T 1 acting on the boarding 20, and the stretched boom 12 and the boom angle sensor 33 measured by the boom length sensor 34. Taking into account the horizontal angle of the telescopic boom 12 measured at, calculates the horizontal distance (L 1 ) from the post boom 11 fixed to the frame (2) to the passenger compartment 20 to calculate the operating moment (M 1 ) Calculate.

The extension length from the center line of the frame 2 measured by the outrigger length sensor 31 to the end of the outrigger 3 and the center line of the frame 2 measured by the boom rotation angle sensor 32 The support moment (M 2 ) is calculated by calculating the distance (L 2 ) from the post boom 11 to the operating point of the outrigger 31 through the boom rotation angle. In general, the distance (L 2 ) to the working point of the outrigger 31 is installed and used in the vehicle refers to the support area that the outrigger 31 can be drawn out and the end of the boom 10 is the rear side of the vehicle. The longer the distance L2 is, the shorter the distance L2 is toward the front side of the vehicle. In other words, the distance L 2 to the outrigger action point is changed according to the rotation angle of the boom.

When the operation moment M1 calculated as described above exceeds the value obtained by multiplying the support moment M2 by the safety factor, there is a risk of overturning. When the risk of overturning occurs, the controller 40 first operates the alarm 41 so that an operator can recognize it.

The control of the control valve 43 is performed by sending a signal to the control valve 43 operated by the remote controller 42 to operate the derrick cylinder 13, the telescope cylinder 14, and the post hydraulic motor 15. Stop it so it doesn't roll over. That is, the boom 10 may be operated only in a direction in which the horizontal distance L 1 from the post boom 11 to the boarding box 20 is shortened.

Similarly, the safety device of the aerial work vehicle according to another embodiment of the present invention has a structure in which a plurality of load sensors 35 are mounted between the boarding bearing 25 and the lower part of the boarding box 20 as shown in FIG. 6. . The inner ring of the boarding bearing 25 is fixed to the bracket 22 and rotatably coupled along the outer circumferential surface of the inner ring, and a screw surface is formed on the outer circumferential surface so that the outer ring rotates by the boarding hydraulic motor 26. The outer ring is coupled to the lower end of the boarding box 20, and a plurality of load sensing sensors 35 are mounted between the outer ring and the engaging surface of the boarding box 20, and the load sensing sensors 35 are radially spaced at equal intervals. It is preferable to arrange. The structure and operation method of the portion except the position where the load sensor 35 is mounted is the same as the preferred embodiment of the present invention.

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

1 is a side view showing an aerial vehicle is a preferred embodiment of the present invention,

2 is a perspective view showing the boarding compartment mount,

Figure 3 is an exploded perspective view showing an exploded passenger compartment mounting portion,

4 is a state diagram schematically showing the operating moment and the support moment,

5 is a block diagram showing a control unit;

Figure 6 is a side view showing the passenger compartment mounting of the aerial vehicle is another preferred embodiment of the present invention.

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

1: aerial work vehicle 2: frame

10: boom 20: boarding

31: Outrigger length sensor 32: Boom rotation angle sensor

33: Boom angle sensor 34: Boom length sensor

35: load detection sensor

Claims (8)

A boom angle sensor mounted to the boom so as to measure a horizontal angle of the boom mounted to the frame; A boom rotation angle sensor mounted to the boom so as to measure the rotation angle of the boom; A boom length sensor mounted to the boom so as to measure the stretching length of the boom; A load sensor mounted on the board so as to measure a load on the board mounted on the front end of the boom; An outrigger length sensor for measuring a protruding length of the outrigger protruding to support the frame on the ground; And Computation of height by comparing the operation moments calculated from the measured load of the board, the elongation length of the boom and the horizontal angle of the boom, and the support moments calculated from the measured rotation angle of the boom and the elongation length of the outrigger. A control unit controlling an operation of the car; Safety device of aerial work vehicle comprising a. The method of claim 1, The load sensor is A first load detection sensor mounted on a connection pin connecting the bracket mounted on the lower end of the board and the boarding frame mounted on the tip of the boom; And A second load detecting sensor mounted on a connection pin connecting the other end of the automatic horizontal cylinder to one end of the boarding frame and the bracket; Safety device of aerial work vehicle comprising a. The method of claim 1, The load sensor is One side is fixed to the bracket connected to the boom end and the other side is fixed to the lower end of the passenger compartment and the aerial work vehicle, characterized in that a plurality of mounted between the boarding bearing and the lower end of the passenger ship is rotated by a board hydraulic motor Safety device. The method according to any one of claims 1 to 3, The boom is A post boom on which one end of the frame is rotatably supported; And Safety device for aerial work vehicle, characterized in that consisting of a telescopic boom rotatably mounted to the other end of the post boom. The method of claim 4, wherein The boom rotation angle sensor is mounted at a point connected to the post boom and the frame, The boom angle sensor is mounted at the point where the post boom and the expansion boom is connected, Safety device for aerial work vehicle, characterized in that the boom length sensor is mounted to the expansion boom. The method of claim 5, A post hydraulic motor mounted to the frame to rotate the post boom; A derrick cylinder having one end connected to the post boom and the other end connected to the expansion boom; And A telescope cylinder mounted inside the telescopic boom to expand and contract the telescopic boom; Safety device of the aerial vehicle, characterized in that it further comprises. The method of claim 6, The controller, if there is a risk of overturning the aerial vehicle, Stabilizer of the aerial work vehicle, characterized in that connected to the control valve to control the operation of the post hydraulic motor, the derrick cylinder and the telescope cylinder. The stabilizer of claim 7, wherein the control unit is connected to an alarm so as to generate an alarm sound before controlling the operation of the post hydraulic motor, the derrick cylinder, and the telescope cylinder.
KR1020090094973A 2009-10-07 2009-10-07 Safety device of aerial lift truck KR20110037498A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090094973A KR20110037498A (en) 2009-10-07 2009-10-07 Safety device of aerial lift truck

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Application Number Priority Date Filing Date Title
KR1020090094973A KR20110037498A (en) 2009-10-07 2009-10-07 Safety device of aerial lift truck

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200458329Y1 (en) * 2011-08-23 2012-02-15 김희주 Aggregate Carrier for Lader Truck
KR101217494B1 (en) * 2011-12-30 2013-01-02 한국자동차재활용 주식회사 Grip unit of crane apparatus for dissolution car
CN103193159A (en) * 2013-04-15 2013-07-10 中国农业大学 Lifting and slewing cycle number detecting system and method for automobile crane boom
CN105480899A (en) * 2015-11-30 2016-04-13 徐州重型机械有限公司 Closed-loop self-adaptive control system of aerial working platform and method thereof
CN109534247A (en) * 2019-01-04 2019-03-29 湖南五新隧道智能装备股份有限公司 A kind of tunnel arch installation vehicle
KR20200113470A (en) 2019-03-25 2020-10-07 김재일 Safety hydraulic control system for high-altitude work vehicle, and hydraulic control method using thereof
KR102596289B1 (en) * 2022-12-19 2023-10-31 (주)테스타 The anti-rollover system of high place working vechicles
CN117208819A (en) * 2023-11-09 2023-12-12 临工重机股份有限公司 Control method of telescopic boom forklift supporting leg and telescopic boom forklift

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200458329Y1 (en) * 2011-08-23 2012-02-15 김희주 Aggregate Carrier for Lader Truck
KR101217494B1 (en) * 2011-12-30 2013-01-02 한국자동차재활용 주식회사 Grip unit of crane apparatus for dissolution car
CN103193159A (en) * 2013-04-15 2013-07-10 中国农业大学 Lifting and slewing cycle number detecting system and method for automobile crane boom
CN105480899A (en) * 2015-11-30 2016-04-13 徐州重型机械有限公司 Closed-loop self-adaptive control system of aerial working platform and method thereof
CN109534247A (en) * 2019-01-04 2019-03-29 湖南五新隧道智能装备股份有限公司 A kind of tunnel arch installation vehicle
KR20200113470A (en) 2019-03-25 2020-10-07 김재일 Safety hydraulic control system for high-altitude work vehicle, and hydraulic control method using thereof
KR102596289B1 (en) * 2022-12-19 2023-10-31 (주)테스타 The anti-rollover system of high place working vechicles
CN117208819A (en) * 2023-11-09 2023-12-12 临工重机股份有限公司 Control method of telescopic boom forklift supporting leg and telescopic boom forklift
CN117208819B (en) * 2023-11-09 2024-02-02 临工重机股份有限公司 Control method of telescopic boom forklift supporting leg and telescopic boom forklift

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