KR101781393B1 - Multi-function crane grab - Google Patents

Abstract

The present invention proposes a multi-functional crane grab configured to use a plurality of tongs all or use only two tongs of the plurality of tongs, and position the other two tongs, not used, in a place that does not interrupt an activity area of the used two tongs, thereby not replacing the entire grapple including the tongs and selecting the used tongs and the unused tongs to be used adaptively to a work environment, and to connect a tube for moving hydraulic oil, which is supplied to a hydraulic cylinder that determines an operation of the tongs or flows out from the hydraulic cylinder, to a hydraulic oil bypass ring of a donut shape formed inside a rotator, thus minimally reducing the disturbance of a crane work by the tube where the hydraulic oil moves.

Description

Multi-function crane grab

In particular, the present invention relates to a crane, and more particularly, to a crane, in which a plurality of clamps are used or only two clamps of a plurality of clamps are used and the remaining two clamps are not used The user can select the used tongs and the unused tongs according to the working environment without replacing the entire grapple including the tongs and the hydraulic oil supplied to the hydraulic cylinder that determines the operation of the tongs or the hydraulic oil recovered from the hydraulic cylinder The present invention relates to a multifunctional crane grab that minimizes the disturbance of crane operation by the moving tube of hydraulic oil by connecting it to a donut-shaped hydraulic oil bypass ring formed inside the rotating rotator.

Crane (crane) is also called a crane, the power is lifted by moving the heavy weight of the field is varied. Particularly, a crane grab is used to pull garbage, scrap iron, waste paper and the like by using a forceps to move to a garbage truck or a waste paper collecting car.

Generally, the shape of the crane grab is located at the upper part, and it can be classified into a rotator for rotating and a graffle for processing scrap iron and gripping etc. located at the lower part of the rotator. The rotator is connected to the end of the crane by a link with gravity, and the link is pinned to the body housing of the rotator.

The number of tongs that are actually installed on the grapple and grasping the scrap or grasps is about four to six, but two tongs are more useful for selecting and moving pipes or H beams in the scrap heaps. Therefore, the number of clamps mounted on the crane is determined according to the nature of the work, and it is troublesome to replace the entire grappler every time. The weight of the grapple is substantial, but it also involves the inconvenience of storing and transporting various types of grapples separately.

Korean Patent No. 10-1096484 (December 14, 2011)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide an apparatus and a method for locating and locating the two tongs using only two of the plurality of tongs, So that it can be adaptively used according to the working environment by selecting the used tongs and the unused tongs without replacing the entire grapple including the tongs and can be supplied to the hydraulic cylinder that determines the operation of the tongs, By connecting the tube for moving the hydraulic oil to the donut-shaped hydraulic oil bypass ring formed inside the rotating rotator, thereby minimizing the disturbance of the tube in which the hydraulic oil moves to prevent the crane operation have.

According to an aspect of the present invention, there is provided a multifunctional crane grab, which is a multi-function crane grab that uses four pliers or two pliers opposed to each other, And includes a crane control unit, a hydraulic pump, a hydraulic oil path selection device, a rotator, and a multifunctional grapple.

The crane control unit generates a plurality of path control signals indicating whether to use four clamps, two clamps and the remaining two clamps to be in an inactive state, and controls the overall operation of the multifunctional crane. The hydraulic pump pumps the hydraulic oil stored in the hydraulic tank. Wherein the hydraulic oil path selector includes a first use mode for transmitting the hydraulic oil pumped from the hydraulic pump to the four clamps in response to the plurality of path control signals and delivering the recovered hydraulic fluid applied from the four clamps to the hydraulic tank, In response to the plurality of path control signals, hydraulic oil pumped from the hydraulic pump is transferred to two of the four tongs but is blocked from being transferred to the remaining two tongs, and the hydraulic oil recovered from the two tongs supplied with hydraulic oil Determines a second mode of use for shutting off the delivery of the recovered hydraulic oil delivered from the two clamps which are transmitted to the hydraulic tank but are not supplied with the hydraulic oil, to the hydraulic tank. The rotator includes four hydraulic oil bypass devices connected to the hydraulic oil path selector at one end thereof and four hydraulic oil bypass rings connected to four different tubes at the other end thereof. The multifunctional grapple rotates in conjunction with the rotator and receives hydraulic fluid from the hydraulic oil bypass ring using two of the four different tubes connected to the four hydraulic oil bypass rings, And a plurality of hydraulic cylinders that operate while transferring the recovered hydraulic fluid to the remaining two hydraulic oil bypass rings through the tubes.

The multifunctional grapple according to the present invention is characterized in that it uses a plurality of grippers or only two of the plurality of grippers and the remaining two grippers do not disturb the active area of the two grippers So that it can be used adaptively according to the working environment by selecting the used forceps and the unused forceps without replacing the entire grapple including the forceps and can be supplied to the hydraulic cylinder for determining the operation of the forceps or from the hydraulic cylinder The tube for moving the hydraulic oil flowing out is connected to a donut-shaped hydraulic oil bypass ring formed inside the rotating rotator, thereby minimizing the disturbance of the tube in which the hydraulic oil is moved from the operation of the crane.

1 is a block diagram of a multifunctional crane grab according to the present invention.
Fig. 2 shows the structure of the grip unit.
Figure 3 is a perspective view of a portion of a multifunctional crane grab according to the present invention.
4 is a cross-sectional view of a portion of a multi-function crane grab according to the present invention.
5 is a plan view of a portion AA 'shown in FIG.
Figure 6 shows the construction of two grippers with different degrees of folding among the four grippers.
Figure 7 illustrates the use of four or two forceps.

In order to fully understand the present invention and the operational advantages of the present invention and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings, which are provided for explaining exemplary embodiments of the present invention, and the contents of the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

1 is a block diagram of a multifunctional crane grab according to the present invention.

1, a multifunctional crane grab 100 according to the present invention includes a crane control unit 110, a hydraulic tank 120, a hydraulic pump 130, a hydraulic oil path selector 140, a rotator 150, The multifunctional grapple 160 is used to perform the scraping and scrapping work using four tongs, and then only the two tongs facing each other are selected, and the pipe or H beam mixed in the scrap iron pile is sorted out Allows you to selectively perform moving tasks. It is one of the key ideas of the present invention to allow the selection of such grips to be left unchanged as a whole.

The crane control unit 110 generates four path control signals C1 to C4 indicating whether to use four clamps or two clamps and to put the remaining two clamps in an inactive state, (100). Users of multi-function crane grab (100, crane grab) will be able to select various jobs using buttons, levers or panels. The crane control unit 110 is installed in a space where the crane driver operates, and generates four path control signals C1 to C4 in response to a command by the driver using buttons or levers.

Since the hydraulic oil output from the hydraulic pump 130 is not used only in the multifunctional grapheme 160, the hydraulic oil output from the hydraulic pump 130 must be able to be transmitted to a place where hydraulic oil is required in addition to the multifunctional grapheme. The crane control unit 110 uses the plurality of selection valves V5 to V7 to generate the path control signals C5 to C7 for instructing to transmit the hydraulic fluid to the main control and the plurality of mechanical devices (mechanical device I and mechanical device II) . Since this configuration has conventionally been used, detailed description is omitted here. The signal C in the parentheses beside the number V of the selection valve means the corresponding path control signal which determines opening and closing of the selection valve.

The hydraulic tank 120 functions to supply hydraulic fluid to the hydraulic cylinder installed in the clamp of the crane grab 100 or to collect and store the hydraulic fluid supplied to the hydraulic cylinder.

Here, the hydraulic cylinder refers to a hydraulic cylinder included in the multifunctional grapple 160 to be described later. The hydraulic cylinder is provided with a cylinder rod that moves along the inside of the hydraulic cylinder. There are two connecting pipes to which hydraulic oil is applied on both sides of the cylinder rod. Depending on which of the connecting pipes, The movement of the rod is determined. For example, supposing that hydraulic oil is transferred to one connector, and the cylinder rod is moved to the inside of the hydraulic cylinder, when hydraulic oil is transferred to the opposite connector, the cylinder rod will protrude to the outside of the hydraulic cylinder. When the hydraulic oil is applied to one side of the hydraulic cylinder, the hydraulic oil on the opposite side of the hydraulic cylinder is discharged and recovered to the hydraulic tank 120, and vice versa. In the following description, it is assumed that the hydraulic oil recovered from the hydraulic cylinder to the hydraulic tank 120 is the recovered hydraulic oil.

The hydraulic pump 130 pressurizes the hydraulic fluid stored in the hydraulic tank 120 transmitted through the first tube T1 and supplies the hydraulic fluid to the hydraulic oil path selector 140, I, the mechanical device II) and the main control, and the hydraulic oil passing through the hydraulic oil path selector 140 is finally transmitted to the hydraulic cylinder.

The hydraulic oil path selector 140 selects the hydraulic oil in the hydraulic tank 120 using the four selection valves V1 to V4 operating in response to the plurality of path control signals C1 to C4 generated by the crane controller 110 It is determined whether or not the hydraulic fluid in the hydraulic cylinder is to be delivered to which hydraulic cylinder, and whether the recovered hydraulic fluid in the hydraulic cylinder is to be returned to the hydraulic tank 120.

The first selection valve V1 couples the first node N1 to one of the third node N3 and the fourth node N4 in response to the first path control signal C1. The second selection valve V2 selects the second node N2 by the first selector valve V1 of the third node N3 and the fourth node N4 in response to the second path control signal C2 Connect to a non-existent node.

Herein, the first node N1 refers to the other end of the eleventh tube T11 connected to the hydraulic pump 130, and the second node N2 corresponds to the other end of the second node N2, Means the other end of the tube T2. The third node N3 means the other end of the twenty first tube T21 connected to the rotator 150 and the fourth node N4 means the other end of the twenty-third tube N21 connected to the rotator 150, T23).

The third selection valve V3 connects the other end of the twenty second tube T22 connected to the rotator 150 to the third node N3 in response to the third path control signal C3. The fourth selection valve V4 connects the other end of the twenty-fourth tube T24 connected to the rotator 150 to the fourth node N4 in response to the fourth path control signal C4.

The direction of flow of hydraulic oil or recovered hydraulic oil will be described below.

The first selector valve V1 selects hydraulic oil supplied from the hydraulic pump 130 in response to the first path control signal C1 to select one path tube of the first path tube or the second path tube, . Here, the first path tube is the twenty first tube T21 and the selected twenty second tube T22, and the second path tube is the twenty third tube T23 and the twenty fourth tube T24 selected. The term "selected" is used here because the twenty-second tube T22 and the twenty-fourth tube T24 can be selected so that the hydraulic oil flows or does not flow by the two valves V3, V4.

The second selection valve V2 selects the path tube not selected by the first selection valve V1 of the first path tube and the second path tube in response to the second path control signal C2 to rotate the rotator 150, To the hydraulic tank (120) through the second tube (T2).

The rotator 150 is rotated in close contact with the inside of the hydraulic oil path selector 140 so that the path of the four tubes T21 to T24 is bypassed to the four tubes T31 to T34. Here, the bypass means that the hydraulic fluid is supplied from the hydraulic fluid path selector 140 to the multifunctional grapheme 160 as a simple transmission path of the hydraulic fluid. It also means that it functions as a simple transmission path of the recovered hydraulic fluid for transferring the recovered hydraulic fluid applied from the multifunctional grapple 160 to the hydraulic tank 120. [

The multifunctional grapheme 160 includes four clamping portions 161 to 164 which rotate in combination with the rotator 150 and which each include a hydraulic cylinder. The hydraulic fluid in the hydraulic tank 120 is supplied to the hydraulic cylinder through the two tubes T31 and T32 of the four tubes T31 to T34 or the recovered hydraulic fluid in the hydraulic cylinder is supplied to the two tubes T33 and T34 The hydraulic oil in the hydraulic tank 120 is supplied to the two tubes T31 to T34 of the four tubes T31 to T34 by operating the grippers included in the grippers 161 to 164, Is supplied to the hydraulic cylinders through the hydraulic cylinders T33 and T34 or returned to the hydraulic tank 120 through the two tubes T31 and T32 so that the hydraulic oil in the hydraulic cylinders is included in the clamping units 161 to 164 To operate the tongs.

The operation of the multifunctional grapple 160 will be described below as an example. At this time, it is assumed that the first selection valve V1 is connected to the first path tube and the second selection valve V2 is connected to the second path tube.

The hydraulic fluid applied through the thirty-first tube T31 branches into two tubes T41 and T42 and is transmitted to the hydraulic cylinders of the first and second clamping portions 161 and 163, T32 are branched into two tubes T43 and T44 and transmitted to the hydraulic cylinders of the second and fourth clamping portions 162 and 164, respectively.

The 45th tube T45 connected to the cylinder of the first clamping unit 161 and the 46th tube T46 connected to the cylinder of the third clamping unit 163 are connected to the 33rd tube T33 to return the recovered hydraulic oil to the rotator The fourth tube T47 connected to the hydraulic cylinder of the second clamping unit 162 and the 48th tube T48 connected to the hydraulic cylinder of the fourth clamping unit 164 are connected to the 34th tube T34, And transmits the recovered hydraulic fluid to the rotator 150. [

In the cylinder of the first clamping unit 161, the 41st tube T41 and the 45th tube T45 are connected to the cylinder, and two connection pipes to which hydraulic oil is applied are connected to both sides of the cylinder rod. have. If the hydraulic fluid is pushed into the 41st tube T41, the recovered hydraulic fluid will flow through the 45th tube T45. Conversely, if the hydraulic oil is pushed into the 45th tube T45, the recovered hydraulic oil will flow through the 41st tube T41. It can be seen that the movement of the cylinder rod is determined depending on which tube the hydraulic fluid flows in and the tube through which the recovered hydraulic fluid flows.

Fig. 2 shows the structure of the grip unit.

Referring to FIG. 2, all the clamps 161 to 164 have a body, a clamp, a hydraulic cylinder, and a cylinder rod, and only their connection relationship is different.

The concrete connection relation of these is described as follows. In the following description, the cylinder means a hydraulic cylinder.

The first clamping unit 161 includes a first body 211, a first clamp 212, a first cylinder 213 and a first cylinder rod 214. The 41st tube T41 And the 45th tube T45, respectively, and the recovered hydraulic oil flowing out. The term exclusive is used here because the recovered hydraulic oil flows out to the 45th tube T45 when the hydraulic oil flows into the 41st tube T41 and the hydraulic oil is simultaneously introduced into the 41st tube T41 and the 45th tube T45 Or the recovered hydraulic oil is not discharged at the same time. One terminal of the first body 211 is coupled to the rotator 150. The first tongue 212 rotates about a first rotation axis (not shown) installed on the first body 211 and performs work with the second tongs. The first cylinder 213 is fixed to the first clamp 212 and the hydraulic fluid is supplied or discharged from the 41st tube T41 and the 45th tube T45. The first cylinder rod 214 has one end connected to the first body 211 and the other end inserted into the first cylinder 213 to flow into or out of the first cylinder 213 So that another work terminal linearly moves inside the first cylinder 213.

The second clamping unit 162 includes a second body 221, a second clamp 222, a second cylinder 223 and a second cylinder rod 224, And the 47th tube T47, respectively, and the recovered hydraulic oil flowing out. One end of the second body 221 is engaged with the rotator 150. The second tongue 222 rotates around a second rotation axis (not shown) installed on the second body 221 and performs work with the tongs on the opposite side. The second cylinder 223 is fixed to the second clamp 222 and is applied or discharged from the 43rd tube T43 and the 47th tube T47. The second cylinder rod 224 has one end connected to the second body 221 and the other end inserted into the second cylinder 223 to flow into or out of the second cylinder 223 And the other work terminal linearly moves inside the second cylinder 223.

The third clamping unit 163 includes a third body 231, a third clamp 232, a third cylinder 233 and a third cylinder rod 234, and a 42nd tube T42 And the 46th tube T46, respectively, and the recovered hydraulic oil flowing out. One terminal of the third body 231 engages with the rotator 150. The third tongue 232 rotates around a third rotary shaft (not shown) provided on the third body 231 and performs work with the tongs on the opposite side. The third cylinder 233 is fixed to the third clamp 232 and the hydraulic oil is supplied or discharged from the 42nd tube T42 and the 46th tube T46. The third cylinder rod 234 has one end connected to the third body 231 and the other end inserted into the third cylinder 233 to flow into or out of the third cylinder 233 And then linearly moves inside the other-terminal third cylinder 233.

The fourth clamping unit 164 includes a fourth body 241, a fourth clamping unit 242, a fourth cylinder 243 and a fourth cylinder rod 244, And operates in accordance with the hydraulic oil flowing into the tubes and the recovered hydraulic oil flowing out respectively. One terminal of the fourth body 241 engages with the rotator 150. The fourth aggregate 242 rotates around a fourth rotary shaft (not shown) installed on the fourth body 241 and performs work with the other side of the clamp. The fourth cylinder 243 is fixed to the fourth clamp 242 and hydraulic fluid is supplied or discharged from the 44th tube T44 and the 48th tube T48. The fourth cylinder rod 244 has one end connected to the fourth body 241 and the other end inserted into the fourth cylinder 243 to flow into or out of the fourth cylinder 243 And then linearly moves inside the other-terminal fourth cylinder 243.

Figure 3 is a perspective view of a portion of a multifunctional crane grab according to the present invention.

4 is a cross-sectional view of a portion of a multi-function crane grab according to the present invention.

3 and 4, the rotator 150 includes a cylindrical rotator external body 151 having a channel distribution groove 152 formed therein, and a rotator internal body 151 rotating on the inner surface of the rotator external body 151 153 and four tongue bodies 211, 221, 231 and 241 are fixed to the rotator lower body 153 in the form of a radiation and four tongue bodies 211, 221, 231 and 241 It can be seen that the four tongues 212, 222, 232, and 242 are connected to each other.

Since the outer surface of the rotator inner body 153 is flat, the outer surfaces of the oil separating groove 152 of the rotator outer body 151 and the inner body 153 of the rotator are formed of four donut-shaped hydraulic oil bypass rings S1 to S4 Respectively.

One terminal of the four tubes (T21 to T24) and one terminal of the four tubes (T31 to T34) are connected to the four hydraulic oil bypass rings (S1 to S4), respectively. Referring to FIG. 4, the four tubes T21 to T24 and the four tubes T31 to T34 are represented as being bypassed because the path is unchanged in the rotator 150 .

The other terminals of the four tubes T21 to T24 are connected to the hydraulic fluid path selector 140 and the other terminals of the four tubes T31 to T34 are connected to the multifunctional grapple 160, respectively.

Referring to FIGS. 3 and 4, the first body 211 to the fourth body 241 are arranged in the radial direction around the lower portion of the rotator 150. In addition, when the pair of the first and second clamping units 161 and 163, or the pair of the second clamping unit 162 and the fourth clamping unit 164 are normally operated, Deactivated. The length of the first cylinder 213, the third cylinder 233, the first cylinder rod 214 and the third cylinder rod 234 constituting the first and second clamping portions 161 and 163 The length of the second cylinder 223, the fourth cylinder 243, the second cylinder rod 224 and the fourth cylinder rod 244 constituting the second clamping unit 162 and the fourth clamping unit 164 . That is, it is preferable that the pair is longer than the other pair.

Differences arise when two pairs of cylinders and cylinder rods of different lengths are driven at the same time. That is, a cylinder with a shorter length and a pair of cylinder rods may have a longer length and a longer cylinder and cylinder rod pair.

Assume that when the cylinder rod protrudes to the outside of the cylinder as much as possible, the clamps gather at the center, and when the cylinder rod is fully inserted into the cylinder, the clamp is folded.

It is assumed that a certain amount of hydraulic oil is simultaneously supplied to two pairs of different lengths of the cylinder and the cylinder rod, or that the recovered hydraulic oil is simultaneously recovered.

In the case of a cylinder having a short length and a cylinder rod, there is no room for further insertion because the cylinder rod is inserted from the cylinder as much as possible, but the flow of the hydraulic fluid and the recovered hydraulic fluid can be continued to the long cylinder and the cylinder rod, A longer cylinder rod will be inserted from the cylinder. As described above, the fact that the cylinder rod is inserted into the cylinder means that the tongs are spread out as far as possible from the center.

In the present invention, when all four clamps are used, they can be used in the same manner as general clamps. When only two clamps are used without using two clamps, as described above, It is proposed that the cylinder rod is sufficiently inserted from the cylinder so that the cylinder rod is opened more than the normal position, and then the cylinder of the clamp not to be used is shut off the flow of the hydraulic oil and the recovered hydraulic oil.

The two clamps are in a steady state and the two clamps are caused to widen further than the normal position and then the hydraulic control valve 140 is controlled using the path control signals C1 to C4, The flow of the hydraulic oil may be blocked. The method of performing work with two pincers is the same as the conventional method. When the two unused clamps are to be reused after the completion of the series of operations, the hydraulic oil path selector 140 can be easily controlled by using the path control signals C1 to C4.

5 is a plan view of a portion A-A 'shown in Fig.

5, the other ends of the four tubes T31 to T34 connected to the four hydraulic oil bypass rings S1 to S4 are connected to two tubes T41 to T48 respectively at the lower portion of the rotator 150 Quot;

The fourth tube T41 branched from the other end of the thirty first tube T31 is connected to the first cylinder 213 of the first clamping unit 161 and the forty second tube T42 is connected to the third clamping unit 163, The second cylinder 233 is connected to the third cylinder 233. The fourth tube T43 branched from the other end of the 32nd tube T32 is connected to the second cylinder 223 of the second clamp 162 and the 44th tube T44 is connected to the fourth clamp 164, And the fourth cylinder 243 of the second cylinder 243.

The 45th tube T45 branched from the other end of the 33rd tube T33 is connected to the first cylinder 213 of the first clamping unit 161 and the 46th tube T46 is connected to the third clamping unit 163, The second cylinder 233 is connected to the third cylinder 233. The fourth tube T47 branching from the other end of the 34th tube T34 is connected to the second cylinder 223 of the second clamping unit 162 and the 48th tube T48 is connected to the fourth clamping unit 164, And the fourth cylinder 243 of the second cylinder 243.

5, the two tubes T41 and T42 branching from the thirty-first tube T31 and the two tubes T45 and T46 branching from the thirty-third tube T33 are branched from the thirty-second tube T32, It is preferable that the tubes are located at positions higher than the two tubes T47 and T48 branching from the two tubes T43 and T44 and the twenty-fourth tube T34 so that the tubes are positioned at different heights so that they do not collide with each other .

Figure 6 shows the construction of two grippers with different degrees of folding among the four grippers.

FIG. 6A shows when the normally used tongs are fully opened, and FIG. 6B shows when the tongs that are not to be used are fully opened. When the cylinder and the cylinder rod shown in FIG. 6A are minimized, the total length d1 of the cylinder and the cylinder rod becomes smaller than the total length d2 of the cylinder and the cylinder rod when the cylinder and the cylinder rod shown in FIG. . In other words, the cylinder and the cylinder rod shown in Fig. 6B are made longer than the cylinder and the cylinder rod shown in Fig. 6A. By doing so, the length of the cylinder rod shown in FIG. 6B inserted into the cylinder can be made longer, so that the tongue to be used is normally positioned higher than the maximum height of the tongs to be used (FIG. 6A) can do. As shown in FIG. 6B, it is preferable to set the highest position of the unused tongs to be higher than the moving radius of the used tongs.

Referring to Figs. 1 and 6, an embodiment in which the multi-function crane grab 100 according to the present invention uses four grippers and uses only two grippers will be described.

First, an embodiment in which all four clamps are used (a first use method) will be described.

The first selection valve V1 alternately selects the first path tube and the second path tube for the operation of folding or unfolding the forceps, wherein the second selection valve V2 is selected by the first selection valve V1 Alternate path tubes are selected. The third selection valve V3 connects the opposite terminal of the twenty second tube T22 to the third node N3 and the fourth selection valve V4 connects the opposite terminal of the twenty fourth tube T24 to the fourth node N4.

If the first path tube, that is, the twenty first tube T21 and the selected twenty second tube T22 are selected by the first selection valve V1, the second path tube, that is, the twenty third tube T23 and the selected twenty fourth tube T24 Will be selected by the second selection valve V2. This is because the hydraulic fluid pressurized by the hydraulic pump 130 is transferred to the rotator 150 through the twenty first tube T21 and the selected twenty second tube T22 and is returned to the rotator 150 from the multifunctional grapheme 160 The hydraulic fluid is recovered to the hydraulic tank 120 through the twenty-third tube T23 and the selected twenty-fourth tube T24. The opposite case can be easily deduced from the above description, and a description thereof is omitted here.

Next, an embodiment (a second mode of use) is described in which two clamps are used and the remaining two clamps are not used.

The unused tongues 162 and 164 are fixed to the upper portion of the working height (dotted line) as shown in Fig. 6B, and then the hydraulic oil is not supplied to the cylinders constituting the tongs 162 and 164, The hydraulic oil and the recovered hydraulic oil will be cut off so as not to recover the hydraulic oil. The flow of the hydraulic oil and the recovered hydraulic oil should be normally performed in the cylinder of the tongues 161 and 163 to be used.

When the third and fourth selection valves V3 and V4 block the connection of the third node N3 and the fourth node N4 to the rotator 150, the unused tongues 162 and 164 The flow of the hydraulic oil and the recovered hydraulic oil can be blocked. The twenty first tube T21 and the twenty third tube T23 are connected to the third node N3 and the fourth node N4 respectively so that the twenty first tube T21 and the twenty third tube T23 are finally connected Only the connected first tongue 161 and the third tongue 163 normally operate.

Figure 7 illustrates the use of four or two forceps.

FIG. 7A shows a state in which scrap iron or waste paper is collected using four tongs 161 to 164, and FIG. 7B shows a state in which a long object such as a log is picked up by two tongs 161 and 163. Referring to FIG. 7B, it can be seen that the two unused tongues 162 and 164 are located at a height higher than the maximum height of the tongs to be used.

The multifunctional crane grab 100 according to the present invention can be usefully used when a single object such as a steel frame or an H beam is long and heavy in the scrap iron when the scrap iron is collected.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

110: Crane control unit
120: Hydraulic tank
130: Hydraulic pump
140: Hydraulic oil path selector
150: Rotator
151: Rotator outer body 152: Rotator inner body
160: Multifunction grapple
161 to 164:

Claims (6)

A multifunctional crane grab that can use four pliers or two mutually opposed pliers to select and work with the other two pliers inactive,
A crane controller for generating a plurality of path control signals indicating whether to use four clamps, two clamps and two remaining clamps to be in an inactive state, and to control the overall operation of the multifunctional crane;
A hydraulic pump for pumping hydraulic oil stored in the hydraulic tank;
A first use mode in which the hydraulic oil pumped from the hydraulic pump is transmitted to the four tongs and the recovered hydraulic fluid supplied from the four tongs is transferred to the hydraulic tank in response to the plurality of path control signals, The hydraulic oil pumped from the hydraulic pump is transmitted to the two tongs of the four tongs but is prevented from being transmitted to the remaining two tongs, and the recovered hydraulic oil applied from the two tongs supplied with the hydraulic oil is transmitted to the hydraulic tank A hydraulic oil path selecting device for determining a second mode of use for shutting off the transfer of hydraulic oil to the hydraulic tank from the two clamps for which supply of hydraulic oil is interrupted;
A rotary rotator including four hydraulic oil bypass rings connected to four tubes connected to the hydraulic oil path selector at one end and four hydraulic tubes connected to four different tubes at each other end; And
The hydraulic oil is taken from the hydraulic oil bypass ring by using two different tubes among the four different tubes connected to the four hydraulic oil bypass rings in combination with the rotator, and the remaining two A multi-function grapheme including a plurality of hydraulic cylinders operated while delivering recovered hydraulic fluid to the hydraulic oil bypass rings; Wherein the hydraulic fluid path selector comprises:
A first selection valve connecting the first node to one of the third node and the fourth node in response to the first path control signal among the plurality of path control signals;
A second selection valve that couples a second node to a node of the third node and the fourth node that is not selected by the first selection valve in response to a second path control signal among the plurality of path control signals;
A third selection valve for connecting the other end of the twenty-second tube, one end of which is connected to the rotator, to the third node in response to a third path control signal among the plurality of path control signals; And
A fourth selection valve connecting one end of the twenty-fourth tube having one end connected to the rotator to the fourth node in response to a fourth path control signal among the plurality of path control signals; / RTI >
Wherein the first node is another end of the eleventh tube connected at one end to the hydraulic pump,
The second node is another end of the second tube connected to the hydraulic tank at one end,
The third node is the other end of the twenty-first tube whose one end is connected to the rotator,
And the fourth node means one end of the twenty-third tube connected to the rotator, respectively. delete The apparatus of claim 1,
A cylindrical rotator outer body having a channel distribution groove formed therein; And
A rotator inner body in which a circular outer surface rotates in close contact with an inner surface of the rotator outer body; Lt; / RTI >
Wherein the four hydraulic oil bypass rings have a donut shape formed by the flow path distribution grooves and the outer surface of the inner body of the rotator. The multi-functional grapple of claim 1,
A first clamp unit operating according to the hydraulic fluid exclusively introduced into the 41st tube and the 45th tube connected to one end and the recovered hydraulic oil flowing out;
A second clamping unit operated according to the hydraulic fluid that is separately flowed into the 43rd tube and the 47st tube connected to one end and the recovered hydraulic oil flowing out;
A third gripper operating according to the hydraulic fluid exclusively introduced into the 42nd tube and the 46th tube connected to one end and the recovered hydraulic oil flowing out; And
A fourth clamp unit operating according to the hydraulic fluid that is separately introduced into the 44th and 48th tubes connected to the one end and the recovered hydraulic oil that flows out respectively; / RTI >
The 41st tube and the 42nd tube are branched from one another among four different tubes connected to the first hydraulic oil bypass ring among the 4 hydraulic oil bypass rings, and the 43rd tube and the 44th tube are 4 Wherein a single tube connected to the second hydraulic oil bypass ring of the hydraulic oil bypass rings is branched, and the 45th tube and the 46th tube are formed by a single tube connected to the third hydraulic oil bypass ring among the four hydraulic oil bypass rings, Wherein the 47th tube and the 48th tube are divided into a single tube connected to a fourth hydraulic oil bypass ring of the 4 hydraulic oil bypass rings. 5. The method of claim 4,
Wherein the first clamping unit comprises:
A first body having a terminal coupled to the rotator;
A first clamp which rotates about a first rotation axis provided on the first body and performs work with a clamp on the opposite side;
A first cylinder fixed to the first clamp and the hydraulic fluid being applied or discharged from the 41st tube and the 45th tube; And
The other terminal is connected to the first body and the other terminal is inserted into the first cylinder so that the other terminal can move linearly within the first cylinder according to the flow of the hydraulic oil flowing into or out of the first cylinder, A first cylinder rod; Lt; / RTI >
Wherein the second gripper comprises:
A second body having a terminal coupled to the rotator;
A second clamp which rotates about a second rotary shaft installed on the second body and performs work with the clamp on the opposite side;
A second cylinder fixed to the second clamp and the hydraulic fluid being supplied or discharged from the 43rd tube and the 47th tube; And
The other terminal is connected to the second body and the other terminal is inserted into the second cylinder so that the other terminal can move linearly within the second cylinder according to the flow of the hydraulic oil flowing into or out of the second cylinder, A second cylinder rod; Lt; / RTI >
The third clamping unit includes:
A third body having a terminal coupled to the rotator;
A third tongue which rotates about a third rotation axis provided on the third body and performs work with the tongs on the opposite side;
A third cylinder fixed to the third clamp and the hydraulic fluid being applied or discharged from the 42nd tube and the 46th tube; And
Wherein the other terminal is connected to the third body and the other terminal is inserted into the third cylinder to flow linearly in the third cylinder according to the flow of hydraulic oil flowing into or out of the third cylinder, A third cylinder rod; Lt; / RTI >
Wherein the fourth clamping unit comprises:
A fourth body having a terminal coupled to the rotator;
A fourth clamp which rotates about a fourth rotary shaft installed on the fourth body and performs work with the clamp on the opposite side;
A fourth cylinder fixed to the fourth clamp and the hydraulic fluid being supplied or discharged from the 44th tube and the 48th tube; And
One end of which is connected to the fourth body and the other end of which is inserted into the fourth cylinder and flows into or out of the fourth cylinder, A fourth cylinder rod; Lt; / RTI >
The first body to the fourth body are arranged in a radial direction around the rotator,
Wherein one pair of the first clamping unit, the third clamping unit, the second clamping unit and the fourth clamping unit arranged to face each other is normally inactivated when the other pair is inactivated. The method of claim 5,
Wherein the lengths of the first cylinder, the third cylinder, the first cylinder rod, and the third cylinder rod constituting the first and third clamping portions constitute the second clamping portion and the fourth clamping portion Is not equal to the length of the second cylinder, the fourth cylinder, the second cylinder rod, and the fourth cylinder rod.

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