KR20150026357A

KR20150026357A - Crane boom assembly

Info

Publication number: KR20150026357A
Application number: KR20130105086A
Authority: KR
Inventors: 배대권
Original assignee: 디와이 주식회사
Priority date: 2013-09-02
Filing date: 2013-09-02
Publication date: 2015-03-11

Abstract

The present invention relates to a boom assembly of a crane. The boom assembly of the crane includes a main boom and a plurality of draw-out boats coupled to the main boom so as to be pulled out, the boom assembly comprising a main boom, A first cylinder for drawing out the first draw-out and going-out boom from the main boom when the N draw-out boom is inserted (N is a natural number of 3 or more), and a second cylinder for drawing out the second draw- A front end operating portion including a cylinder and a first valve block for controlling a flow of fluid for operating the first cylinder; And a rear end operating portion including a third cylinder for drawing out the third inlet / outlet opening from the second inlet / outlet opening and a second valve block for controlling the flow of fluid for operating the third cylinder, And the first valve block and the second valve block operate independently of each other.

Description

[0001] Crane boom assembly [0002]

The present invention relates to a boom assembly for a crane, in particular for a boom assembly comprising a plurality of booms, wherein some of the booms are operated by the front end operating portion and the remaining portions of the boom are operated by the rear end operating portion, So that the length of the boom assembly can be adjusted according to the work situation by operating only one of the front end operation portion and the rear end operation portion as necessary or simultaneously operating the front end operation portion and the rear end operation portion, To a boom assembly of a crane capable of shortening the working time by an optional draw-out.

As shown in Fig. 1, a typical crane is composed of an engine drive unit 1, a loading unit 2, and a crane unit 3. The crane portion 3 is a portion that substantially pulls the load body. The crane section 3 is provided with a boom assembly 4.

2, the boom assembly 4 includes a plurality of booms 11, 12, 13, 14, 15 and 16 connected to hydraulic cylinders 21, 22 and 23, wires 31, And the pulleys 32, 42, 51, and 52.

Specifically, in consideration of stability, the boom assembly 4 normally includes the hydraulic cylinders 21, 22, 22, and 24 to the first boom 11, the second boom 12, the third boom 13 and the fourth boom 14, 23 sequentially.

The fifth boom 15 and the sixth boom 16 are driven by the drawing wires 31 and 41 which are not driven by hydraulic pressure in consideration of their own loads but are rotatably wound on the drawing pulleys 32 and 42 Out.

The operation process will be described in detail as follows. The boom assembly 4 is sequentially inserted into the first boom 11 from the second boom 12 to the sixth boom 16 in sequence.

A first cylinder (21) is installed between the first boom (11) and the second boom. One end of the first rod 211 of the first cylinder 21 is fixed to the first boom 11 and the first cylinder body 212 of the first cylinder 21 is fixed to the second boom 12 .

A second cylinder (22) is installed between the second boom (12) and the third boom (13). One end of the second rod 221 of the second cylinder 22 is fixed to the second boom 12 and the second cylinder body 222 of the second cylinder 22 is fixed to the third boom 13 . The distal end of the second rod 221 is communicated with the distal end of the first cylinder body 212.

A third cylinder (23) is installed between the third boom (13) and the fourth boom (14). One end of the third rod 231 of the third cylinder 23 is fixed to the third boom 13 and the third cylinder body 223 of the third cylinder 23 is fixed to the fourth boom 14 do. The distal end of the third rod 23 communicates with the distal end of the second cylinder body 223.

When the hydraulic pressure is applied to the inside of the first cylinder 21, the first rod 211 protrudes from the first cylinder body 212 and the first cylinder body 212 moves to the right, The second boom 12 protrudes from the first boom 11 and is drawn out.

At this time, the second cylinder 22 installed between the second boom 12 and the third boom 13 is moved in accordance with the drawing operation of the second boom 12, and then the first rod 22 of the first cylinder 21 211 are completely protruded, hydraulic pressure is applied to the second cylinder body 222 to start the projecting operation.

That is, in the operation of the second cylinder 22, the hydraulic pressure is applied to the first cylinder 21 so that the first rod 211 protrudes, and when the first cylinder body 212 moves, The hydraulic pressure introduced into the first cylinder 21 flows into the second cylinder body 222 of the second cylinder 22 through the tip of the second rod 221 of the second cylinder 22 The second rod 221 of the second cylinder 22 is protruded and the third boom 13 is moved to the right to be drawn out.

Similarly, the third cylinder 23 provided between the third boom 13 and the fourth boom 14 is moved in accordance with the drawing operation of the third boom 13, and the second rod 221 of the second cylinder 22 The protruding operation is started.

The third cylinder 23 is protruded by applying hydraulic pressure to the second cylinder 22 so that the second rod 221 protrudes and the second cylinder body 222 is moved to the right and the second rod 221 The hydraulic pressure that has flowed into the second cylinder body 222 flows into the third cylinder body 232 through the tip of the third rod 231 of the third cylinder 23, The third rod 231 of the first boom 23 protrudes from the third cylinder body 232 and the fourth boom 14 protrudes rightward.

In this manner, the second, third, and fourth boom (12, 13, 14) are protruded by the first, second and third cylinders (21,

On the other hand, the fifth boom 15 and the sixth boom 16 are pulled out by the wire and the pulley, not by the cylinder device.

The withdrawal of the fifth boom 15 is carried out as follows. One end of the third boom 13 and one end of the fifth boom 15 are connected to each other by a first wire 31 for drawing and the first wire 31 for drawing is connected to the fourth boom 14 A first pulley 32 for drawing is provided. When the fourth boom 14 is pulled out by the third cylinder 23, the first pulley 32 provided on the fourth boom 14 is moved to the right and the fifth boom 15 is pulled out.

The drawing of the sixth boom 16 is carried out as follows. One end of the fourth boom 14 and one end of the sixth boom 16 are connected by the second wire for drawing 41 and the second wire for drawing 42 is hooked on the fifth boom 15 A second pulley 42 for drawing is provided. When the fifth boom 15 is drawn out as described above, the sixth boom 16 is drawn out while the second pulley 42 for drawing is moved to the right.

As a result, in the creel-boom assembly, the withdrawal operation causes the second boom 12 to start the withdrawal operation by the first cylinder 21, at which time the third to sixth booms 13, 14, 15, Is in a stopped state. Then, when the third boom 13 starts to be drawn out by the second cylinder 22, the fourth to sixth booms 14, 15, and 16 are in a stopped state. In addition, when the fourth boom 14 is drawn out by the third cylinder 23, the fifth boom 15 and the sixth boom 16 are simultaneously drawn out.

Meanwhile, in the conventional crew-boom assembly according to the above-described configuration, the sequential feed-in process of each boom will be described as follows.

One end of the fourth boom 14 and one end of the sixth boom 16 are connected by a lead wire 50. The lead wire 50 is connected to a lead wire 1 pulley 51 and a second pulley 52 for insertion which is provided in the second cylinder 22. [

When the first rod 211 of the first cylinder 21 is inserted into the first cylinder body 212, the second boom 12 to which the first cylinder body 212 is fixed is inserted into the first boom 11 Lt; / RTI >

The second rod 221 of the second cylinder 22 is operated at the time when the second boom 12 is completely inserted into the first boom 11 and the third boom 13 is driven by the second boom 12 ).

The third rod 231 of the third cylinder 23 starts the insertion operation at the time when the third boom 13 is completely inserted into the second boom 12, Is inserted into the third boom (13).

At this time, as the third cylinder body 232 of the third cylinder 23 is moved to the left side, the first pull-in pulley 51 provided on the third cylinder body 232 is moved to the left side, So that the sixth boom 16 is pulled.

The retracting operation of the third cylinder 23 causes the pulling wire 50 to be pulled together with the operation of inserting the fifth and sixth booms 15 and 16 into the fourth and fifth booms 14 and 15, respectively, The boom (16) is inserted into the fifth boom (15).

The incoming wire 50 fixed to the fifth boom 15 is pulled by the insertion operation of the fifth boom 15 and is retracted by pushing the first pulling pulley 32 provided on the fourth boom 14 And the fifth and sixth boom (15, 16) are inserted into the fourth and fifth boom (14, 15), respectively.

In this way, since the first, second, third, and fourth boom assemblies are sequentially drawn and drawn by the cylinder apparatus, the time required for drawing and pulling in is increased, and the use of the fuel is increased accordingly there is a problem.

Particularly, in order to take out the fifth and sixth booms 15 and 16, the second, third, and fourth booms 12, 13, and 14 must be sequentially taken out from the first boom 11, There are disadvantages.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems described above, and it is an object of the present invention to provide a boom assembly comprising a plurality of boom assemblies, wherein a part of the boom is operated by a front end operation part, The front end operating portion and the rear end operating portion can be independently operated so that either the front end operating portion or the rear end operating portion is operated as required or the front end operating portion and the rear end operating portion are simultaneously operated, Which can adjust the length of the boom assembly according to the situation in consideration of the load and the working radius of the boom assembly, and to shorten the working time by selectively drawing out the boom assembly.

According to an aspect of the present invention, there is provided a boom assembly for a crane comprising: a main boom; and a plurality of outflow / A first cylinder for drawing out the first draw-in / out boom from the main boom when the first draw-in / out boom to N-th draw-out boom are successively inserted into the main boom (N is a natural number of 3 or more) A front end operating portion including a second cylinder for drawing out the second drawing-out / going-out boom from the drawing-out boom, and a first valve block for controlling the flow of the fluid for operating the first cylinder; And a rear end operating portion including a third cylinder for drawing out the third inlet / outlet opening from the second inlet / outlet opening and a second valve block for controlling the flow of fluid for operating the third cylinder, And the first valve block and the second valve block operate independently of each other.

Further, the rear end operating portion may include: a first wire having one end coupled to the second outgoing / incoming boom and the other end coupled to the fourth outgoing / incoming boom; A first pulley installed in the third draw-in / out boom for guiding and guiding the first wire; A second wire, one end of which is coupled to the third draw-out I / O and the other end of which is coupled to the fifth draw-out I / A second pulley installed on the fourth take-out and going-in boom for guiding and guiding the second wire; A third wire, one end of which is coupled to the fifth draw-out / going-in boom and the other end of which is coupled to the third draw-out / A third pulley installed in the third cylinder and guiding the third wire through the third pulley; And a fourth pulley installed in the second cylinder for guiding and guiding the third wire.

In addition, it is preferable that the first cylinder and the second cylinder operate sequentially.

Further, it is preferable that only one of the front end operating portion and the rear end operating portion operates.

Further, it is preferable that the front end operating portion and the rear end operating portion simultaneously operate.

According to another aspect of the present invention, there is provided a boom assembly for a crane including a main boom and a boom assembly for a crane having a plurality of draw- A front end cylinder which draws out the first draw-out / going-out boom from the main boom when the first draw-in / out draw-in boom (N is a natural number of 3 or more) is inserted sequentially into the main boom, A shear pulley coupled to the main boom and having a second end coupled to the second draw-out and going-in boom, a shear pulley installed on the first draw-out boom for guiding and guiding the shear wire, A front end operating portion including a first valve block for controlling the first valve block; And a rear end operating portion including a rear end cylinder for drawing out the third outgoing and going in / out from the second draw-out and going-in boom and a second valve block for controlling the flow of fluid for operating the rear end cylinder, And the valve block and the second valve block operate independently of each other.

Also, the rear end operating portion may include: a first rear end wire having one end coupled to the second outgoing / incoming boom and the other end coupled to the fourth outgoing / A first rear end pulley installed in the third inlet / outlet boom for guiding and guiding the first rear end wire; A second rear end wire, one end of which is coupled to the third outgoing input / output and the other end is coupled to the fifth outgoing / A second rear-end pulley installed on the fourth draw-out / going-in boom for guiding and guiding the second rear-end wire; A third rear end wire, one end of which is coupled to the fifth draw-out-and-going boom, and the other end of which is coupled to the third draw-out I / A dummy cylinder having one end coupled to the second draw-out I / O; A third rear end pulley installed on the rear end cylinder and guiding the third rear end wire to guide the third rear end pulley; And a fourth rear end pulley coupled to the dummy cylinder for guiding and guiding the third rear end wire.

Preferably, the dummy cylinder is disposed between the front end cylinder and the rear end cylinder with respect to the vertical height.

The boom assembly of a crane according to the present invention is characterized in that, for a boom assembly comprising a plurality of booms, some of the booms are operated by the front end operating portion and the remaining portions of the boom are operated by the rear end operating portion, It is possible to operate only one of the front end operation portion and the rear end operation portion, or to operate the front end operation portion and the rear end operation portion simultaneously, if necessary.

Therefore, it is possible to drive the spring assembly according to the situation in consideration of the load and the working radius of the load body to be lifted by using the crane. For example, when the load of the load body is relatively light, it is possible to operate only the rear end operating portion, and in the case of the load body having a large load, it is possible to operate only the front end working portion by operating. In this case, there is an advantage in that the length of the boom assembly can be appropriately selected in consideration of the working radius of the crane.

In addition, when only one of the front-end operation unit and the rear-end operation unit is used, only a part of the booms constituting the spring assembly are taken out, thereby saving the time required for the boom to be drawn in and out, can do.

Further, when some booms are taken out and the remaining booms are operated without being drawn out, the remaining booms which are not drawn out remain in a state of overlapping with each other, so that the boom assembly can work more safely without fear of breakage or the like.

In addition, when the front end operating portion and the rear end operating portion are operated at the same time, the first and second valve blocks simultaneously operate to improve the speed of drawing out the boom assembly, thereby improving the operating speed and reducing fuel consumption.

1 is a schematic side view of a conventional crane,
Figure 2 is a cross-sectional view of the crane boom assembly employed in Figure 1,
3 is a cross-sectional view of a crane boom assembly according to one embodiment of the present invention,
FIG. 4 is a view showing a state in which the crane boom assembly of FIG.
5 is a view showing a boom assembly in a state in which the front end operation section is operated,
6 is a view showing a boom assembly in a state in which a rear end operating section is operated,
7 is a view showing a state in which the front end operating portion and the rear end operating portion are simultaneously operated and drawn by 1/2 of the maximum length,
8 is a cross-sectional view of a crane boom assembly according to another embodiment of the present invention.

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

3 is a cross-sectional view of a crane boom assembly in accordance with one embodiment of the present invention. 4 is a view showing a state in which the crane boom assembly of FIG. 3 is retracted. FIG. 5 is a view showing a boom assembly in a state in which the front end operating section is in operation, and FIG. 6 is a view showing a boom assembly in a state in which the rear end operating section is in operation. 7 is a view showing a state in which the front end operating part and the rear end operating part are simultaneously operated and drawn by 1/2 of the maximum length.

The main boom comprises a main boom, a plurality of draw-in and out draw-outs coupled to the main boom so as to be drawn in and out, a cylinder device for drawing out a part of the draw- And pulleys on which the wires are wound.

Referring to FIG. 3, the boom assembly of a crane according to an embodiment of the present invention includes a front end operating portion and a rear end operating portion.

According to the present embodiment, there is provided a boom assembly for a crane having a main boom 100 and a plurality of draw-out booms coupled to the main boom 100 so as to be drawn out and drawn out, The first to fourth draw-in boom (101) to the N-th draw-in boom (N is a natural number of 3 or more) are inserted sequentially. Referring to FIG. 3, the crane boom assembly according to the present embodiment has a configuration in which five draw-out booms are inserted into the main boom 100.

Of course, the number of draw-outs can be changed according to the specifications of the crane. For example, three of the drawing I / O 101 to the third drawing I / O 103 may be provided, or six of the first drawing I / O 101 to the sixth drawing I / O may be provided.

The front end operating portion is provided to draw out the first draw-in / out boom 101 and the second draw-in / out boom 102 from the main boom 100.

The front end operating portion includes a first cylinder 210, a second cylinder 220, and a first valve block 600.

The first cylinder 210 is provided to draw out the first draw-in / out boom 101 from the main boom 100. Specifically, the first cylinder 210 includes a first rod 201 and a first cylinder body 202.

According to the present embodiment, the first rod 201 is fixed at one end to the main boom 100, inserted into the first cylinder body 202, The first cylinder body 202 is fixed to the first draw-out / In this embodiment, one end of the first cylinder body 202 is fixed to the tip end of the first draw-out /

When the first rod 201 of the first cylinder 210 protrudes from the first cylinder body 202, the first draw-in / out boom 101 is drawn out from the main boom 100, and the first rod 201 Is inserted into the first cylinder body (202), the first draw-in / out boom (101) is drawn into the main boom (100).

The second cylinder 220 is provided to draw out the second inlet / outlet boom 102 from the first inlet / outlet boom 101. Specifically, the second cylinder 220 includes a second rod 203 and a second cylinder body 204.

According to the present embodiment, the second rod 203 is fixed to the first draw-out / input boom 101 and is inserted into the second cylinder body 204 and is coupled to the first rod 203 so as to be capable of projecting and retracting. The second cylinder body 204 is fixed to the second draw-out / In this embodiment, one end of the second cylinder body 204 is fixed to the distal end portion of the second drawing-out /

When the second rod 203 of the second cylinder 220 protrudes from the second cylinder body 204, the second draw-out and input boom 102 is drawn out from the first draw-out and input boom 101, The second inlet / outlet boom 102 is drawn into the first inlet / outlet boom 101 when the first inlet / outlet 203 is inserted into the second cylinder body 204.

The first valve block 600 is provided to control the flow of the fluid that operates the first cylinder 210. The first cylinder 210 is operated by allowing the working fluid to flow into or out of the first cylinder 210 through the first valve block 600.

According to the present embodiment, the first cylinder 210 and the second cylinder 220 operate sequentially. The first rod 201 of the first cylinder 210 is extended and then the second rod 201 is pulled out from the second boom 100. In other words, when the first draw-in / out boom 101 and the second draw- 220 are stretched.

On the other hand, when the first draw-in / out boom 101 and the second draw-out / going-out boom 102 are drawn into the main boom 100, the second rod 203 of the second cylinder 220 is immersed, The first rod 201 of the first rod 210 is immersed.

The rear end operating portion is provided to draw out the third loading / unloading boom 103 from the second loading / Further, according to the embodiment of the present invention, the rear end operating portion draws out the third through fifth draw-in / out boom (103, 104, 105) from the second draw- The fourth and fifth draw-in / out boom 104 and 105 from the third draw-in / out draw-in 103 will be described later.

The rear end actuating part includes a third cylinder 230 and a second valve block 700.

The third cylinder 230 draws the third inlet / outlet box 103 from the second inlet / outlet box 102. Specifically, the third cylinder 230 includes a third rod 205 and a third cylinder body 206.

The third rod 205 is fixed to the second loading / unloading boom 102 and inserted into the third cylinder body 206 to be detachably coupled. The third cylinder body 206 is fixed to the third inlet / In this embodiment, one end of the third cylinder body 206 is fixed to the tip end of the third draw-out /

When the third rod 205 of the third cylinder 230 protrudes from the third cylinder body 206, the third input / output boom 103 protrudes from the second input / output boom 102, When the rod 205 is inserted into the third cylinder body 206, the third draw-in / out boom 103 is drawn into the second draw-out /

The second valve block 700 controls the flow of the fluid that operates the third cylinder 230. The third cylinder 230 is operated by allowing the working fluid to flow into or out of the third cylinder 230 through the second valve block 700.

The second valve block 700 operates independently of the first valve block 600. Accordingly, the operation of the third cylinder 230 by the second valve block 700 and the operation of the first cylinder 210 by the first valve block 600 are independent of each other.

Accordingly, either the front end operating portion or the rear end operating portion may operate, or the front end operating portion and the rear end operating portion may operate simultaneously.

The first cylinder 210 is operated by the first valve block 600 and then the second cylinder 220 is operated so that the first and second loading and unloading booms 101 and 102 are drawn out from the main boom 100 . On the other hand, the third cylinder 230 can be maintained in an inoperative state by the second valve block 700. In this case, the third draw-in / out boom 103 can be maintained in a state of being drawn into the second draw-in / out boom 102, and the third draw-in / out booms 103, 104 and 105 can be kept superimposed on each other.

As another example, the front end operating portion and the rear end operating portion simultaneously operate to draw out all of the first to fifth draw-in booms 101, 102, 103, 104, and 105 from the main boom 100. [ Of course, the degree of withdrawal of each of the draw-in I / Os can be adjusted as shown in Fig.

The rear end operating portion according to the embodiment of the present invention includes a first wire 310, a first pulley 311, a second wire 410, a second pulley 411, a third wire 510, (511), and a fourth pulley (512).

The first wire 310 is provided for pulling out the fourth draw-in / out boom 104 from the third draw-in / out boom 103. One end of the first wire 310 is coupled to the second draw-out input-output 102 and the other end is coupled to the fourth draw-out input-and-output 104.

The first pulley 311 is provided to guide the first wire 310 by hanging it. The first pulley 311 is installed in the third loading / unloading boom 103. In this embodiment, the first pulley 311 is disposed at the end portion of the third draw-out /

The second wire 410 is provided to pull out the fifth draw-in / out boom 105 from the fourth draw-in / out boom 104. One end of the second wire 410 is coupled to the third draw-out input-output 103 and the other end is coupled to the fifth draw-out and input-draw 105.

The second pulley 411 is provided for guiding the second wire 410. The second pulley 411 is installed in the fourth loading / unloading boom 104. In this embodiment, the second pulley 411 is disposed at the end of the fourth draw-out /

The third wire 510 is provided to draw the fifth draw-in / out boom 105 into the fourth draw-in / out boom 104. One end of the third wire 510 is coupled to the fifth I / O boom 105 and the other end is coupled to the third I / O boom 103.

The third pulley 511 and the fourth pulley 512 are provided for guiding and guiding the third wire 510. The third pulley 511 is installed in the third cylinder 230. Specifically, the third pulley 511 is installed in the third cylinder body 206.

The fourth pulley 512 is installed in the second cylinder 220. Specifically, the fourth pulley 512 is installed in the second cylinder body 204.

In this embodiment, the third wire 510 extends from one end of the fifth draw-in / out boom 105, is first wound on the third pulley 511 and extends toward the fifth draw-in / out boom 105, And is wound on the pulley 512 and then extends in the direction toward the main boom 100 and fixed to the third loading / unloading boom 103.

Hereinafter, the operation and effect of the boom assembly of the crane constructed as above will be described in detail.

The boom assembly of the crane according to the present embodiment is operable independently of the front end operating portion and the rear end operating portion. Will be described in detail with reference to Figs. 4 to 7. Fig.

Fig. 4 shows a state in which all of the draw-out booms constituting the boom assembly are drawn into the main boom. FIG. 5 shows the state of the boom assembly when only the front end operating part operates in the state of FIG. 4, and FIG. 6 shows the state of the boom assembly when only the rear end operating part operates in the state of FIG. will be.

Only the front end operating portion operates to pull out the first and second loading / unloading booms 101 and 102 from the main boom 100 as follows.

The first rod 201 of the first cylinder 210 is extended by the first valve block 600 to draw out the first inlet and the outlet boom 101 from the main boom 100 and the operation of the first cylinder 210 The second cylinder 220 is operated to draw out the second loading / unloading boom 102 from the first loading / At this time, since the rear end operating portion remains in an inoperative state, the third input / output ports 103 to the fifth input / output ports 105 are kept overlapped with each other (see FIG. 5).

The process in which the first and second loading / unloading boom (101, 102) are drawn into the main boom (100) is as follows. The second cylinder 220 is operated so that the second input / output boom 202 is drawn into the first input / output boom 101 and the first rod 201 of the first cylinder 210 is connected to the first cylinder body 202 And the first draw-in / out boom 101 is drawn into the main boom 100.

It is preferable to drive only the front end operating portion when the load body is relatively heavy. In this case, only the front end operating portion is operated, so that the drawing out of the third draw-in / out boom 103 to the fifth draw-in / out draw-out boom 105 can be omitted to improve the working speed and save fuel.

In the meantime, a process in which only the rear end operating part operates to pull out the third outgoing input / output boom 103 to the fifth outgoing / incoming boom 105 from the second outgoing / incoming boom 102 is as follows.

The third rod 205 of the third cylinder 230 is extended by the second valve block 700 and the third inlet / outlet boom 103 is drawn out from the second inlet / outlet boom 102.

When the third draw-in / out draw-in boom 103 is pulled out, the fourth draw-in / out draw-in boom 104 and the fifth draw-in / out draw-out boom 105 are pulled out.

Specifically, when the third loading / unloading / loading 103 is drawn out, the first pulley 311 coupled to the end of the third loading / unloading / loading 103 moves to the right. One end of the first wire 310 engaged with the first pulley 311 is connected to the second I / O boom 102 and the other end is connected to the fourth I / O boom 104.

Therefore, when the first pulley 311 moves to the right side, the position of the coupling point where the first wire 310 is connected to the fourth input / output boom 104 is shifted to the right side because the length of the first wire 310 is constant. The fourth inlet / outlet box 104 is drawn out from the third inlet / outlet box 103.

When the fourth draw-in / out box 104 is pulled out from the third draw-in / out boom 103, the second pulley 411 coupled to the end portion of the fourth draw-out / One end of the second wire 410 engaged with the second pulley 411 is connected to the third input / output boom 103 and the other end is connected to the fifth input / output boom 105.

Since the length of the second wire 410 is constant, when the second pulley 411 moves to the right, the position of the coupling point where the second wire 410 is connected to the fifth draw-out / The fifth draw-in / out draw-in ball 105 is pulled out from the fourth draw-in /

The fourth draw-out input / output boom 104 and the fifth draw-out input / output boom 105 are arranged in such a manner that the third draw-in / out draw-in boom 103 draws out the second draw- (See Fig. 6).

The process in which the third to fourth outflow input / output ports 103 to 105 are led into the second outflow input / output boom 102 is as follows.

When the third rod 205 of the third cylinder 230 is inserted into the third cylinder body 206 by the second valve block 700, the third inlet / outlet boom 103 is drawn into the second outlet / do.

When the third rod 205 of the third cylinder 230 is inserted into the third cylinder body 206, the third pulley 511 coupled to the third cylinder body 206 moves to the right, 105), and the fifth draw-in / out draw-in boom 105 is drawn into the fourth draw-in / out draw-in boom 104.

At this time, the coupling point of the second wire 410 coupled to the fifth draw-out / input / output boom 105 moves to the left, pulling the second pulley 411, so that the fourth draw- .

It is preferable to drive only the rear end operating portion in the case where the load body is relatively light and lightweight. In this case, since only the rear end operating portion is operated, it is possible to omit the drawing-out of the first drawing-out input / output 101 and the second drawing-out loading /

7 is a view showing a state in which the front end operating portion and the rear end operating portion are simultaneously operated, and the boom of the boom assembly is drawn out by 1/2 of the maximum length of the maximum boom.

That is, the first rod 201 of the first cylinder 210 and the second rod 203 of the second cylinder 220 are drawn out by half by the front end operating portion, and the first load 201 from the main boom 100, And the second draw-in / out boom 102 is pulled out from the first draw-in / out boom 101 by half.

When the third rod 205 of the third cylinder 230 is drawn by half by the rear end operating portion, the third draw-in / out boom 103 is drawn out from the second draw-in / out boom 102 by half, The fourth draw-in / out boom 104 is also withdrawn from the nipple 103 by half and the fifth draw-in / out boom 1050 is withdrawn from the fourth draw-in / out boom 104 by half.

The process of re-entering the draw-in / outs in the drawn-out state is the same as that described above, so a detailed description will be omitted.

As described above, the boom assembly of the crane according to the embodiment of the present invention provides the effect that the front end operating portion and the rear end operating portion can be independently operated to effectively apply the crane to various working environments.

That is, the length at which the boom assembly is pulled out can be easily adjusted. The boom can be taken out and drawn in accordance with the necessity when it is out of the uniform condition that all the booms are conventionally drawn or drawn.

Further, when working within a working radius in which either the front end operation portion or the rear end operation portion can be selectively used, the boom assembly of the crane can be driven in consideration of the weight of the load body.

That is, when the load body is relatively heavy, the main boom 100 and the first and second loading / unloading booms 102 and 103 are used to drive only the front end operating portion. In the case where the load body is relatively light, The main boom 100 and the third to fifth loading / unloading booms 103, 104 and 105 can be selectively used.

It also provides the effect of easily and quickly changing the withdrawal length of the boom assembly when it is necessary to lift different load bodies during operation or to change the working radius to adjust the withdrawal length of the boom assembly.

For example, when the working radius is reduced and the load body is light in the state as shown in FIG. 7, the pulled-out state of the third to fifth draw-in / out boom (101, 104, 105) It is possible to easily and rapidly change the withdrawal length of the boom assembly by pulling the boom (101, 102) into the main boom (100).

Of course, if the extension length of the boom assembly is to be varied, the draw-out length of the boom assembly can be adjusted by selectively driving the front end operation portion and the rear end operation portion in various cases other than the above-described examples.

Meanwhile, the present invention can be implemented as an embodiment according to FIG. In FIG. 8, the same reference numerals are assigned to configurations that perform the same functions as those in the preceding embodiment.

Referring to FIG. 8, the boom assembly of the crane according to the embodiment of the present invention includes a front end operating portion and a rear end operating portion as in the embodiment according to FIG.

The front end operating portion is provided to draw out the first draw-in / out draw-in boom 101 and the second draw-in / out draw-in boom 102 from the main boom 100 and includes a front end cylinder 800, a front end wire 810, 600).

The front end cylinder 800 performs the same function as the first cylinder 210 of FIG. 3, and draws and receives the first inlet / outlet boom 101 from the main boom 100. The front end cylinder 800 includes a rod 801 and a cylinder body 802.

The rod 801 is fixed at one end to the main boom 100 and is inserted into the cylinder body 802 to be capable of protruding and retracting. The cylinder body 802 is fixed to the first draw-out / In this embodiment, one end of the cylinder body 802 is fixed to the distal end portion of the first drawing /

When the rod 801 of the front end cylinder 800 protrudes from the cylinder body 802, the first loading / unloading boom 101 is pulled out of the main boom 100 and the rod 801 is pulled out of the cylinder body 802 The first draw-in / out boom 101 is drawn into the main boom 100. The main draw-

The shear wire 810 and the shear pulley 820 are provided to draw the second draw-in / out boom 102 from the first draw-in / out boom 101.

One end of the shear wire 810 is coupled to the main boom 100 and the other end is coupled to the second input / output boom 102.

The shear pulley 820 is installed in the first draw-in / out boom 101 and guides the shear wire 810 by guiding it. One end of the shear wire 810 is coupled to the end of the main boom 100 and the shear pulley 820 is installed at the end of the first draw-

When the rod 801 of the front end cylinder 800 is extended, the first draw-in / out boom 101 is pulled out of the main boom 100 and the front end pulley 820 Is moved to the right side (with reference to Fig. 8), the second loading / unloading box 102 is pulled out from the first loading /

On the other hand, when the rod 801 of the front end cylinder 800 is immersed in the cylinder body 802, the first draw-in / out boom 101 is drawn into the main boom 100, The pulley 820 is moved to the left side and the second loading / unloading box 102 is drawn into the first loading /

The first valve block 600 has the same function and function as those described in the embodiment of FIG. The first valve block 600 is provided to control the flow of the fluid for operating the front end cylinder 800. The front end cylinder 800 is operated by allowing the working fluid to flow into or out of the front end cylinder 800 through the first valve block 600.

The rear end operating portion includes a rear end cylinder 900 and a second valve block 700.

The rear end cylinder 900 performs the same function as the third cylinder 230 of FIG. 3 and draws the third inlet / outlet 103 from the second inlet / outlet I / O. Specifically, the rear end cylinder 900 includes a rod 901 and a cylinder body 902.

The rod 901 is fixed to the second inlet / outlet 102 and inserted into the cylinder body 902 so as to protrude / retract. The cylinder body 902 is fixed to the third draw-out / In this embodiment, one end of the cylinder body 902 is fixed to the tip end of the third draw-out /

When the rod 901 of the rear end cylinder 900 protrudes from the cylinder body 902, the third input / output boom 103 protrudes from the second input / output boom 102, The third draw-in / out boom 103 is drawn into the second draw-out / in / out boom 102.

The second valve block 700 has the same function and function as those described in the embodiment of FIG. The second valve block 700 controls the flow of the fluid to operate the rear cylinder 900. The rear end cylinder 900 is operated by allowing the working fluid to flow into or out of the rear end cylinder 900 through the second valve block 700.

In this embodiment, the second valve block 700 operates independently of the first valve block 600. Accordingly, the operation of the rear cylinder 900 by the second valve block 700 and the operation of the front cylinder 800 by the first valve block 600 are independent of each other.

Accordingly, either the front end operating portion or the rear end operating portion may operate, or the front end operating portion and the rear end operating portion may operate simultaneously. Therefore, this embodiment also provides the same operation and effect as the embodiment of Fig.

For example, the first valve block 600 actuates the front end cylinder 800 to be drawn out from the main boom 100 into the first draw-in / out boom 101, and is guided by the front end wire 810 and the front-end pulley 820 The second draw-in / out boom 102 is pulled out from the first draw-in / On the other hand, the rear cylinder 900 can be kept in an inoperative state by the second valve block 700. In this case, the third draw-in / out boom 103 can be maintained in a state of being drawn into the second draw-in / out boom 102, and the third draw-in / out booms 103, 104 and 105 can be kept superimposed on each other.

The rear end operating portion according to the embodiment of the present invention includes a first rear end wire 910, a first rear end pulley 920, a second rear end wire 930, a second rear end pulley 940, a third rear end wire 950 A dummy cylinder 960, a third rear-end pulley 970, and a fourth rear-end pulley 980.

The first rear end wire 910, the first rear end pulley 920, the second rear end wire 930, the second rear end pulley 940, the third rear end wire 950, the third rear end wire 930, The rear end pulley 970 and the fourth rear end pulley 980 are connected to the first wire 310, the first pulley 311, the second wire 410, the second pulley 411, The third wire 510, the third pulley 511, and the fourth pulley 512, respectively. In the rear end operating portion employed in the present embodiment, the fourth rear end pulley 980 is coupled to the dummy cylinder 960.

Specifically, the first rear end wire 910 is provided for pulling out the fourth draw-in / out boom 104 from the third draw-in / out boom 103. One end of the first rear end wire 910 is coupled to the second input / output I / O boom 102 and the other end is coupled to the fourth output I / O boom 104.

The first rear end pulley 920 is provided to guide the first rear end wire 910 by hanging. The first rear end pulley 920 is installed in the third loading / unloading boom 103. In this embodiment, the first rear end pulley 920 is disposed at the end portion of the third draw-out /

The second rear end wire 930 is provided to pull out the fifth draw-in / out draw-in boom 105 from the fourth draw-in / out draw-in boom 104. One end of the second rear end wire 930 is coupled to the third draw-out input-output 103 and the other end is coupled to the fifth draw-

The second rear end pulley 940 is provided to guide the second rear end wire 930 by hanging. And the second rear end pulley 940 is installed in the fourth draw-out / In this embodiment, the second rear end pulley 940 is disposed at the end portion of the fourth draw-out /

The third rear end wire 950 is provided to draw the fifth draw-in / out boom 105 into the fourth draw-in / out boom 104. One end of the third rear end wire 950 is coupled to the fifth draw-out and input-draw 105 and the other end is coupled to the third draw-in and input-draw 103.

The third rear end pulley 970 and the fourth rear end pulley 980 are provided to guide and guide the third rear end wire 950. The third rear end pulley 970 is installed in the rear end cylinder 900. Specifically, the third rear end pulley 970 is installed in the cylinder body 902 of the rear end cylinder 900.

The fourth rear end pulley 980 is installed in the dummy cylinder 960.

Specifically, the dummy cylinder 960 is disposed between the front end cylinder 800 and the rear end cylinder 900 with reference to the vertical height of the draw-in / out boom. One end of the dummy cylinder is coupled to the end of the rod 901 of the rear end cylinder 900 and extends in parallel to the cylinder body 902 of the rear end cylinder 900.

The dummy cylinder 960 serves as a rodless cylinder for supporting the fourth rear end pulley 980. The fourth rear end pulley 980 is coupled to the other end of the dummy cylinder 960.

In this embodiment, the third rear end wire 950 extends from one end of the fifth draw-in / out boom 105, is first wound on the third rear-end pulley 970 and extends toward the fifth draw-in / out boom 105, Is wound on the fourth rear-end pulley 980 and extends in the direction toward the main boom 100 and is fixed to the third loading / unloading boom 103.

The process of drawing the third draw-out / fifth draw-out / fifth draw-in / out boom by the rear-end operating portion according to the present embodiment is the same as that of the embodiment of FIG. 3, so a detailed description thereof will be omitted.

On the other hand, the third loading / unloading boom to the fifth loading / unloading boom are guided by the following operation by the rear end operating portion according to the present embodiment.

The rod 901 of the rear end cylinder 900 is immersed and the third inlet / outlet box 103 is drawn into the second outlet / inlet / outlet 102. When the rod 901 of the rear end cylinder 900 is immersed, the third rear end pulley 970 coupled to the cylinder body 902 of the rear end cylinder 900 moves to the left side The third rear end pulley 980 and the fourth rear end pulley 980 are spaced apart from each other and the third rear end pulley 980 is connected to the dummy cylinder 960, And the fifth draw-in / out draw-in boom 105 is drawn into the fourth draw-in / out draw-in boom 104. [ The second rear end pulley 940 moves to the left side while pulling the second rear end wire 930 while the third withdrawal input / output 103 and the fifth withdrawal / 3 draw-in / out box 103 as shown in Fig.

Thus, the boom assembly of the crane according to the embodiment of Fig. 8 provides similar actions and effects as the boom assembly of the crane according to the embodiment of Fig. In this embodiment, as in the embodiment of FIG. 3, since the front end operating portion and the rear end operating portion are independently operated, the effect of applying the crane effectively to various working environments is provided. The effects that the front-end operation unit and the rear-end operation unit operate independently of each other are described above, and a detailed description thereof will be omitted.

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, and many modifications may be made without departing from the scope of the present invention.

100 ... main boom 101 ... first draw-in boom
102 ... second take-out boom 103 ... third take-out boom
104 ... fourth take-out boom 105 ... fifth take-out boom
210 ... First cylinder 201 ... First rod
202 ... first cylinder body 220 ... second cylinder
203 ... second rod 204 ... second cylinder body
230 ... third cylinder 205 ... third load
206 ... third cylinder body 310 ... first wire
311 ... first pulley 410 ... second wire
411 ... second pulley 510 ... third wire
511 ... 3rd pulley 512 ... 4th pulley
600 ... first valve block 700 ... second valve block
800 ... transfer cylinder 810 ... shear wire
820 ... transmission pulley 900 ... rear cylinder
910 ... first rear end wire 920 ... first rear end pulley
930 ... second rear end wire 940 ... second rear end pulley
950 ... 3rd rear end wire 960 ... dummy cylinder
970 ... third rear-end pulley 980 ... fourth rear-end pulley

Claims

1. A boom assembly for a crane having a main boom and a plurality of draw-out booms coupled to the main boom so as to be capable of being pulled out,
When the first draw-in / out boom 101 to the N-th draw-out boom are sequentially inserted into the main boom 100 (N is a natural number of 3 or more)
A first cylinder 210 for drawing out the first draw-in / out boom 101 from the main boom 100 and a second cylinder 210 for pulling out the second draw-out / A front end operating part including a cylinder 220 and a first valve block 600 for controlling the flow of fluid for operating the first cylinder 210; And
A third cylinder 230 for drawing out the third inlet / outlet 103 from the second inlet / outlet 102 and a second valve block for controlling the flow of the fluid for operating the third cylinder 230 700, < / RTI >
Wherein the first valve block (600) and the second valve block (700) operate independently of each other.

The method according to claim 1,
The rear-
A first wire (310) having one end coupled to the second input / output port (102) and the other end coupled to the fourth input / output port (104);
A first pulley 311 installed on the third input / output / input / output 103 for guiding and guiding the first wire 310;
A second wire 410 having one end coupled to the third outflow input / output 103 and the other end coupled to the fifth outgoing / incoming input 105;
A second pulley 411 installed on the fourth loading / unloading boom 104 for guiding and guiding the second wire 410;
A third wire 510, one end of which is coupled to the fifth draw-in / out buoy 105 and the other end of which is coupled to the third draw-out /
A third pulley 511 installed in the third cylinder 230 and guiding the third wire 510 by guiding it;
And a fourth pulley (512) installed on the second cylinder (220) and guiding the third wire (510) by guiding it.

The method according to claim 1,
Wherein the first cylinder (210) and the second cylinder (220) operate sequentially.

The method according to claim 1,
Wherein only one of the front end operating portion and the rear end operating portion operates.

The method according to claim 1,
Wherein the front end operating portion and the rear end operating portion operate simultaneously.

1. A boom assembly for a crane having a main boom and a plurality of draw-out booms coupled to the main boom so as to be capable of being pulled out,
When the first draw-in / out boom 101 to the N-th draw-out boom are sequentially inserted into the main boom 100 (N is a natural number of 3 or more)
A front end cylinder 800 for pulling out the first outflow input / output boom 101 from the main boom 100 and a front end cylinder 800 having one end coupled to the main boom 100 and the other end coupled to the second outflow / A front end pulley 820 installed at the first inlet / outlet 101 for guiding the front end wire 810 and guiding the front end pulley 810; A first valve block (600) arranged to open and close the first valve block (600); And
A second valve block 700 for controlling the flow of fluid to operate the rear cylinder 900, a second valve block 700 for controlling the flow of the fluid to operate the rear cylinder 900, And a rear end operating portion including a rear end,
Wherein the first valve block (600) and the second valve block (700) operate independently of each other.

The method according to claim 1,
The rear-
A first rear end wire (910) having one end coupled to the second outgoing input / output boom (102) and the other end coupled to the fourth outgoing input / output boom (104);
A first rear end pulley 920 installed in the third loading / unloading boom 103 for guiding the first rear end wire 910;
A second rear end wire (930) having one end coupled to the third outgoing input / output boom (103) and the other end coupled to the fifth outgoing input / output boom (105);
A second rear end pulley 940 installed on the fourth loading / unloading boom 104 for guiding and guiding the second rear end wire 930;
A third rear end wire 950, one end of which is coupled to the fifth input / output port 105, and the other end of which is coupled to the third input / output port 103;
A dummy cylinder (960) having one end coupled to the second inlet / outlet port (102);
A third rear end pulley 970 installed on the rear end cylinder 900 and guiding the third rear end wire 950 by guiding the third rear end pulley 970;
And a fourth rear end pulley (980) coupled to the dummy cylinder (960) for guiding and guiding the third rear end wire (950).

The method according to claim 6,
Wherein only one of the front end operating portion and the rear end operating portion operates.

The method according to claim 6,
Wherein the front end operating portion and the rear end operating portion operate simultaneously.

8. The method of claim 7,
Wherein the dummy cylinder (960) is disposed between the front end cylinder (800) and the rear end cylinder (900) with respect to a vertical height.