KR20160150556A - Crane apparatus - Google Patents

Crane apparatus Download PDF

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Publication number
KR20160150556A
KR20160150556A KR1020150088728A KR20150088728A KR20160150556A KR 20160150556 A KR20160150556 A KR 20160150556A KR 1020150088728 A KR1020150088728 A KR 1020150088728A KR 20150088728 A KR20150088728 A KR 20150088728A KR 20160150556 A KR20160150556 A KR 20160150556A
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KR
South Korea
Prior art keywords
winch
hydraulic oil
boom
load
hydraulic
Prior art date
Application number
KR1020150088728A
Other languages
Korean (ko)
Inventor
배대권
Original Assignee
디와이 주식회사
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.)
Filing date
Publication date
Application filed by 디와이 주식회사 filed Critical 디와이 주식회사
Priority to KR1020150088728A priority Critical patent/KR20160150556A/en
Publication of KR20160150556A publication Critical patent/KR20160150556A/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
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/54—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/88—Safety gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/08—Electrical assemblies or electrical control devices for cranes, winches, capstans or electrical hoists
    • B66C2700/084—Protection measures

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane device, and more particularly, to a crane device capable of varying a rated load according to a speed of a winch and determining an overload according to the speed of the winch, thereby increasing durability of the winch, ≪ / RTI >

Description

CRANE APPARATUS

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane device, and more particularly, to a crane device capable of varying a rated load according to a speed of a winch and determining an overload according to the speed of the winch, thereby increasing durability of the winch, ≪ / RTI >

The crane device 10 is provided with a boom frame 20 provided on the crane vehicle T and capable of varying the length and the relief angle, a hook 40 for pulling the hoist P from the boom frame 20, And a winch 50 connected to one side of the wire 30 and adapted to wind the wire 30 to adjust the height of the hook 40. [ A method (A) of winding the wire (30) using the winch (50) as shown in Fig. 1, a method (A) of lifting the hoistway (P) through the crane device A method (B) for adjusting the relief angle, and a method (C) for varying the length of the boom frame 20 as shown in Fig.

A predetermined lifting load is applied when lifting the rolled-up water P by winding the wire 30 using the winch 50 by adjusting the length and the relief angle of the float 20. If the lifting load exceeds the rated load, the winch 50 may be damaged and a safety accident may occur. Therefore, when a lifting load exceeding the rated load is applied, the operation of the winch 50 and the boom frame 20 is controlled A predetermined control device may be provided.

However, although the rated load may be variable depending on the operating speed of the winch 50, the case where the lifting efficiency is lowered or the durability of the winch 50 is lowered due to the determination of whether the rated load is fixed and overloaded Respectively.

Therefore, it is necessary to develop a crane apparatus 10 capable of solving such a problem.

Published patent 1998-702858

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above problems, and it is an object of the present invention to overcome the above-mentioned problems of the prior art by varying the rated load according to the speed of the winch and judging the overload according to the speed of the winch, thereby increasing the durability of the winch, Which is capable of preventing a crane from being damaged.

In order to achieve the above object, a crane apparatus according to the present invention comprises: a boom unit having a variable length and a relief angle; A wire provided on the boom frame and extending along the boom frame and capable of hanging a predetermined cargo; A load cell sensing a lifting load of the lifting body suspended from the wire; A winch for lifting and lowering the lifting body suspended from the wire so that the wire is wound; A winch speed adjusting device for varying an operating speed of the winch; And a control device for controlling the operation of the boom bar and the winch, wherein the control device sets a different rated load according to the operating speed of the winch, and when the lifting load sensed by the load cell is equal to or higher than the set rated load, And stopping the operation of the winch.

Preferably, the control device has a configuration for setting a low load weight load when the operation speed of the winch is high, and setting a high load weight load when the operation speed of the winch is low.

Preferably, a hydraulic power unit for operating the boom bar and the winch through hydraulic oil; Wherein the control device controls operation of the hydraulic power unit to control operation of the boom bar and the winch, wherein the hydraulic power unit includes a hydraulic oil supply unit for supplying hydraulic oil, a hydraulic oil tank for storing hydraulic oil, A rising line for connecting the hydraulic oil supply unit to the winch and the boom bar to transmit the hydraulic oil to the winch or the boom bar when the winch is operated, the boom bar is stretched, and the rising angle of the boom bar is increased, A drain line through which the hydraulic oil supplied from the hydraulic oil supply unit can be discharged to the hydraulic oil tank, and a valve unit that allows the hydraulic oil supplied from the hydraulic oil supply unit to selectively flow through the ascending line or the discharge line, The extension of the boom frame, or the elevation angle of the boom frame, When the lifting load sensed by the load cell is equal to or greater than the set rated load, the control unit operates the valve unit to operate the hydraulic oil supplied from the hydraulic oil supply unit to the winch or the boom, Is introduced into the working oil tank through the discharge line.

Preferably, the valve portion includes a control valve provided on the up line and a dump valve provided on the discharge line. When the operation of the winch, the extension of the boom, or the relief angle of the boom is increased, The hydraulic oil supplied from the hydraulic oil supply unit is transmitted to the winch or the boom bar via the ascending line, and when the lifting load sensed by the load cell is equal to or higher than the set load load, the control device operates the dump valve, And the operating fluid supplied from the supplying section flows into the working oil tank through the discharge line.

The crane device according to the present invention increases the durability of the winch by judging the overload separately according to the speed of the winch, and breakage and safety accident can be prevented.

1 is a view showing lifting of a cargo by the operation of a winch of a crane device of the prior art.
FIG. 2 is a view showing lifting of a cargo by rise of a rising / falling angle of a boom of a crane device of the prior art.
3 is a view showing lifting of a cargo by variable length of a boom length of a crane device of the prior art.
4 is a view showing a structure of a crane device of the present invention.
5 is a view showing a structure of a winch of the crane device of the present invention.
6 is a view showing a structure of a crane apparatus according to another embodiment of the present invention.
7 is a view showing a structure of a hydraulic power unit of a crane apparatus according to the present invention.
8 is a table showing operation examples of the control apparatus of the crane apparatus according to the present invention.
9 is a view showing an operation algorithm of the crane apparatus according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The present embodiments are not intended to be limiting.

FIG. 4 is a view showing a structure of a crane device according to an embodiment of the present invention, FIG. 5 is a view showing a structure of a winch of a crane device of the present invention, and FIG. FIG. 7 is a view showing a structure of a hydraulic power unit of a crane apparatus according to the present invention.

The crane device according to the present invention includes a boom bar 100; A wire 200; A load cell 300; Winch (400); A winch speed adjusting device 500; And a control device (600).

The boom frame 100 is composed of an assembly in which a plurality of booms are assembled and have a predetermined length. Accordingly, the boom frame 100 may have a multi-stage structure in which the length thereof is varied by the plurality of booms. The plurality of booms have a predetermined length and are drawn out from each other, and the length of the boom frame 100 is variable. On the other hand, the boom bar 100 is installed in the crane vehicle T, but the relief angle can be variably controlled. That is, the boom frame 100 may have a structure in which the length and the relief angle are adjusted.

One end in the longitudinal direction of the boom frame 100 is connected to the crane vehicle T so as to vary the relief angle and a predetermined hook 110 is suspended at the other end in the longitudinal direction of the boom frame 100. On the other hand, the boom bar 100 may include a boom extension cylinder capable of adjusting the length of the boom bar 110, and a boom undershoot cylinder capable of adjusting the relief angle of the boom bar.

The wire 200 is provided to the boom bar 100 and extends along the boom bar 100. The wire 200 is configured to suspend a predetermined lifting pose P and is preferably configured to suspend the lifting pose P through a hook 110 constituted by a member such as a predetermined hook as shown in Fig. . Accordingly, the wire 200 may have appropriate thickness, length, and rigidity so as to suspend the lifted object P. On the other hand, one side of the wire 200 in the longitudinal direction is connected to a winch 400 to be described later and wound.

The load cell 300 may be provided in the boom bar 100 and may include a predetermined sensor provided to sense the lifting load of the lifting pile hanging on the wire 200. The load cell 300 may transfer the lifting load of the lifted pile P to the control devices 600 and 600 described later.

The winch 400 is installed in the lower end of the boom bar 100 to wind up the wire 200 to lift and lower the cargo P. 5, the winch 400 includes a drum 410 to which one end of the wire 200 is fixed and winds the wire 200, a winch motor 420 that rotates the drum 410, And a speed reducer 430 capable of adjusting the speed of the winch motor 420. [ The winch motor 420 rotates the drum 410 to adjust the winding length of the wire 200 so that the lifted object P hanging on the wire 200 can be raised or lowered. That is, when the winch 400 is operated so that the wire 200 is further wound on the drum 410, the pull-over water P rises and conversely, when the wire 200 is pulled out of the drum 410, ), The descendant P is descended.

The winch speed adjusting device 500 is provided to vary the operating speed of the winch 400. The winch speed regulating device 500 may have a configuration including a predetermined control switch to set the speed of the winch 400 by a user. Here, the operating speed of the winch 400 may be regarded as the rotational speed at which the drum 410 provided in the winch 400 winds or loosens the wire 200.

The control device 600 is provided to control the operation of the boom bar 100 and the winch 400. The control device 600 includes a predetermined operation algorithm therein to set a predetermined rated load in accordance with the operating speed of the winch 400. More specifically, the control device 600 sets a low load weight load when the operation speed of the winch 400 is high, and sets a low load load weight when the operation speed of the winch 400 is low, .

The control device 600 compares the rated load set in accordance with the operating speed of the winch 400 and the lifting load of the lifting pile P sensed by the load cell 300. When the lifting load is equal to or greater than the rated load, And the operation of the winch 400 is stopped. That is, when the lifting load is equal to or greater than the rated load, the length of the boom frame 100 is extended or the relief angle is stopped, or the drum 410 of the winch 400 is rotated to stop the winding of the wire 200 .

6, the crane apparatus according to the present invention may further include a hydraulic power unit 700. The hydraulic power unit 700 may be a hydraulic power unit.

The hydraulic power unit 700 is provided to operate the boom bar 100 and the winch 400 with hydraulic pressure through hydraulic oil. The hydraulic power unit 700 includes a hydraulic oil supply unit 710, a hydraulic oil tank 720, a lift line 730, a discharge line 740, and a valve unit 750. Fig. 7 conceptually shows the structure of this hydraulic power unit 700. Fig.

The hydraulic oil supply unit 710 supplies hydraulic oil to the winch 400 and the boom bar 100 to allow the winch 400 and the boom bar 100 to operate. Accordingly, the winding operation of the wire 200 through the winch 400, the extension of the boom frame 100, the rise of the boat frame 100, and the like can be achieved.

The working oil tank 720 is provided so as to store operating oil. On the other hand, the hydraulic oil stored in the hydraulic oil tank 720 is supplied again to the hydraulic oil supply unit 710 so that the hydraulic oil can be circulated.

The lift line 730 may be formed of a predetermined piping line and the hydraulic oil supplied from the hydraulic oil supply unit 710 by connecting the hydraulic oil supply unit 710, the winch 400 and the boom 100, And the boom bar 100, respectively. When the winch 400 is operated to wind the wire 200, to extend the boom frame 100 and to increase the relief angle of the boom frame 100, the hydraulic fluid is supplied to the winch 400 through the up line 730, And the boom bar 100 are provided.

The discharge line 740 may be formed of a predetermined pipe line and connects the hydraulic oil supply unit 710 and the hydraulic oil tank 720. On the other hand, the hydraulic oil supply unit 710, the discharge line 740, and the ascending line 730 do not necessarily have to be directly connected to each other, but are connected to the ascending line 730 and the discharge line 730 from a predetermined line connected to the hydraulic oil supply unit 710 740 may be branched, but this is not so limited.

The valve unit 750 allows the hydraulic fluid supplied from the hydraulic fluid supply unit 710 to selectively flow through the up line 730 or the discharge line 740. The valve unit 750 may include a control valve 752 provided in the ascending line 730 and a dump valve 754 provided in the discharge line 740. When the control valve 752 is operated The hydraulic oil can be supplied to the winch 400 and the boom 100 through the ascending line 730. When the dump valve 754 is operated and opened, the hydraulic oil is supplied to the hydraulic oil tank 720 ). ≪ / RTI >

The operation of the hydraulic power unit 700 will be described below.

The rated load is set in accordance with the operating speed of the winch 400 and the lifting load, which is the load of the lifted pile P, is detected in the load cell 300. The control device 600 compares the rated load with the lifting load, and when the lifting load is equal to or less than the rated load, the boom block 100 and the winch 400 operate normally. The control device 600 transmits a signal to the control valve 752 so that the hydraulic fluid supplied from the hydraulic oil supply unit is transmitted to the boom 100 or the winch 400 through the ascending line 730, Thus, the extension of the boom bar 100, the undulation of the boom bar 100, and the operation of the winch 400 are normally operated.

On the other hand, the control device 600 compares the rated load with the lifting load, and stops the operation of the boom block 100 and the winch 400 when the lifting load exceeds the rated load. The controller 600 transmits a signal to the dump valve 754 so that the hydraulic fluid supplied from the hydraulic fluid supply unit 710 is transferred to the hydraulic fluid tank 720 through the discharge line 740, The boom bar 100 and the winch 400 may not be transmitted to the boom bar 100 and the winch 400 to stop the operation of the boom bar 100 and the winch 400. More specifically, the control valve 752 provided in the up line 730 is closed and the dump valve 754 provided in the discharge line 740 is opened to discharge the working oil into the working oil tank 720, 400 and the boom bar 100 can be stopped.

The lifting force capable of lifting is changed in accordance with the operating speed of the winch 400. That is, when the operating speed of the winch 400 is high, the available lifting force is lowered, and when the operating speed of the winch 400 is low, the lifting power is increased. Even if the lifting force is lowered in the state where the operating speed of the winch 400 is high, the lifting p exceeding the allowable lifting force is transferred to the winch 400, undulation of the wobble table 100, Lifting through the kidneys can damage the winch 400 and cause safety accidents.

According to the present invention, as the speed of the winch 100 is adjusted, a rated load corresponding to a different possible lifting force is set, and a comparison between the set rated load and the sensed lifting load determines whether or not there is an overload, The durability of the winch 400 is increased, the breakage of the winch 400 is prevented, and the occurrence of a safety accident can be prevented.

FIG. 8 is a table showing an operation example of the control device 600 of the crane device according to the present invention. 8A shows the rated load according to the speed of the winch 400. When the speed of the winch 400 is high, the rated load is set to 0 to 1000 kg. When the speed of the winch 400 is low, 0 to 2000 kg.

8B shows the operation of the boom bar 100 and the winch 400 depending on the speed and the lifting load of the winch 400. In Fig. When the lifting load is smaller than the rated load, the normal operation is performed. However, when the lifting load becomes larger than the rated load, the operation of the boom 100 and the winch 400 is stopped. The lifting load of the winch 400 is higher than the rated load when the operating speed of the winch 400 is high and the operating speed of the winch 400 is low. The lifting load is not more than the rated load. Therefore, when the operating speed of the winch 400 is high, the operation of the boom bar 100 and the winch 400 is stopped at the lifting load.

Fig. 9 shows an operation algorithm of the crane apparatus according to the present invention.

First, the speed of the winch 400 is adjusted by the winch speed adjusting device 500, and then, the control device 600 sets a different rated load according to whether the speed of the winch 400 is high or not. In FIG. 9, it is shown for convenience that the first rated load is applied when the speed is high and the second rated load is applied when the speed is low.

Then, the lifting load of the cargo is detected through the load cell 300. When the speed of the winch 400 is high, the lifting load and the first rated load are compared. When the speed of the winch 400 is low, the lifting load and the second rated load are compared with each other. The operation of the boom bar 100 or the winch 400 is stopped. When the operation of the boom bar 100 and the winch 400 is stopped, the speed of the winch 400 is adjusted by the speed adjusting device 700 of the winch 400 so that the crane device can be operated again.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the invention.

100: Boom
110: Hook
200: wire
300: Load cell
400: winch
500: Winch speed regulator
600: control device
700: Hydraulic power unit
710:
720: Working oil tank
730: rising line
740: discharge line
750: valve portion
752: Control valve
754: Dump valve

Claims (4)

A boom table (100) having a variable length and a relief angle;
A wire 200 provided on the boom bar 100 and extending along the boom bar 100 and capable of hanging a predetermined cargo;
A load cell 300 for sensing the lifting load of the lifting body suspended from the wire 200;
A winch 400 configured to wind the wire 200 so as to lift and lower the cargo hanging from the wire 200;
A winch speed adjusting device (500) for varying the operating speed of the winch (400);
And a control device (600) for controlling the operation of the boom bar and the winch,
The control device (600)
A crane for stopping the operation of the boom block 100 and the winch 400 when the load capacity sensed by the load cell 300 is equal to or greater than a set rated load, while setting a different rated load according to the operation speed of the winch 400 Device (600). The method according to claim 1,
The control device (600)
A low load weight load is set when the operating speed of the winch 400 is high,
(600) for setting a high rated load when the operating speed of the winch (400) is low. The method according to claim 1,
A hydraulic power unit 700 for operating the boom bar 100 and the winch 400 through hydraulic oil; Further comprising:
The control device 600 controls the operation of the hydraulic power unit to control the operation of the boom bar 100 and the winch 400,
The hydraulic power unit (700)
A hydraulic oil supply unit 710 for supplying hydraulic oil,
A hydraulic oil tank 720 for storing hydraulic oil,
The operation of the winch 400 and the extension of the boom frame 100 and the operation oil at the time of rising of the boom frame 100 can be performed by connecting the winch 400 and the boom frame 100 to the winch 400, A rising line (730) for transmitting the signal to the boom bar (100)
A discharge line that connects the hydraulic oil supply unit 710 to the hydraulic oil tank 720 and allows the hydraulic oil supplied from the hydraulic oil supply unit 710 to be discharged to the hydraulic oil tank 720,
And a valve unit 750 for selectively allowing the hydraulic fluid supplied from the hydraulic fluid supply unit 710 to flow through the up line 730 or the discharge line 740,
The hydraulic oil supplied from the hydraulic oil supply unit 710 is supplied to the winch 400 through the ascending line 730 when the winch 400 is operated, the boom bar 100 is extended, Or to the boom bar 100,
When the lifting load detected by the load cell 300 is equal to or greater than the set load rating, the control unit 600 operates the valve unit 750 so that the hydraulic fluid supplied from the hydraulic fluid supply unit 710 is discharged to the discharge line 740 To the hydraulic oil tank (720). The method of claim 3,
The valve unit 750 includes:
A control valve 710 provided on the up line 730, and
And a dump valve (720) provided in the discharge line (740)
The control valve 710 is operated when the operation of the winch 400, the extension of the boom bar 100 or the relief angle of the boom bar 100 increases and the hydraulic oil supplied from the hydraulic oil supply unit 710 is supplied to the ascending line 730 To the winch 400, or to the boom bar 100,
The controller 600 operates the dump valve 720 so that the hydraulic fluid supplied from the hydraulic fluid supply unit 710 is discharged to the discharge line 740 To the hydraulic oil tank (720).
KR1020150088728A 2015-06-22 2015-06-22 Crane apparatus KR20160150556A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180137320A (en) * 2017-06-16 2018-12-27 한국기계연구원 Life and Performance Test Equipment for a Carrige of a Ladder Truck

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980702858A (en) 1995-03-10 1998-08-05 안자키사토루 Winch speed control method and device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980702858A (en) 1995-03-10 1998-08-05 안자키사토루 Winch speed control method and device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180137320A (en) * 2017-06-16 2018-12-27 한국기계연구원 Life and Performance Test Equipment for a Carrige of a Ladder Truck

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