WO2022169006A1

WO2022169006A1 - Lifting apparatus for crane

Info

Publication number: WO2022169006A1
Application number: PCT/KR2021/001599
Authority: WO
Inventors: 전재영; 윤만중
Original assignee: 주식회사 파워엠엔씨
Priority date: 2021-02-02
Filing date: 2021-02-08
Publication date: 2022-08-11
Also published as: KR102366998B1; KR102366998B9

Abstract

The present invention relates to a lifting apparatus which is suspended from a crane and moves to transport an article. The lifting apparatus of the present invention comprises: a first beam extending in a longitudinal direction and having first points which are spaced apart from each other from the longitudinal center to both sides and are respectively coupled to the crane; a second beam disposed below the first beam and extending in the longitudinal direction; a horizontal adjustment means which connects second points spaced apart from each other from the longitudinal center of the first beam to both sides thereof and the third points spaced apart from each other from the longitudinal center of the second beam to both sides thereof, and is configured such that the length is expanded and contracted to adjust the horizontality of the second beam; a plurality of lifting blocks spaced apart from each other along the longitudinal direction of the second beam and movably installed along the longitudinal direction of the second beam, wherein each lifting block has a suspension point at which the article is suspended; and a positioning mechanism driven so as to adjust the respective positions of the lifting blocks in the longitudinal direction of the second beam, wherein the article is suspended by means of the plurality of lifting blocks and is movable.

Description

Lifting devices for cranes

The present invention relates to a lifting device for a crane, and more particularly, to a lifting device for transporting a heavy object according to the movement of the crane by hanging a heavy object in a state suspended from the crane.

Cranes are widely used in industrial sites to transport heavy goods. Cranes carry heavy objects by suspending them and moving up and down or horizontally. A crane is provided with a hook, and a sling or wire wound around the heavy object is hung on the hook to suspend and move the heavy object.

A heavy object to be transported by a crane is large, and especially a long weight such as a turbine rotor of a generator must be transported while maintaining a horizontal posture, but it is difficult to move the heavy object by maintaining the posture with only slings or wires. There is a high risk of collision with surrounding objects, tilting or falling of heavy objects.

For this reason, in the case of transporting an article having a large weight or a long length, a lifting beam composed of a long extending beam is suspended on a hook of a crane and the article is coupled to a plurality of points of the lifting beam and transported.

However, the lifting beam has a problem in that it is difficult to stably couple or suspend the article because the point for joining the article is fixed.

As a lifting device to solve this problem, Korean Patent Application Laid-Open No. 10-2015-0008532 (Document 1) discloses an invention called "a lifting device of a crane".

In the invention of Document 1, lugs are installed at both ends of the elongated lifting beam, and the wire bound between the lugs is hung on the hook of the crane to install the lifting beam in the crane.

Two trolleys moving by rollers are installed on the lifting beam in the longitudinal direction, and the position of the trolley is adjusted with a wire wound by a motor, and a heavy object is hung on the trolley to move.

However, in the lifting device according to the invention of Document 1, since the lifting beam is hung on the hook of the crane by a wire, there is a problem in that it is very difficult to horizontally adjust and maintain the lifting beam.

In addition, since the position of the trolley on which the heavy object is suspended is adjusted by moving by the rollers along the longitudinal direction of the lifting beam, a stopper must be manually installed to fix the adjusted position. Therefore, there is a problem that the position adjustment and the installation of the stopper must be repeated several times in the position adjustment operation.

The present invention is to provide a lifting device of a configuration that is easy to transport the heavy object according to the movement of the crane by hanging the heavy object in a state suspended from the crane in consideration of the problems of the prior art described above.

Specifically, the present invention is to provide a lifting device that facilitates leveling the device suspended on the crane and maintains the aligned horizontal posture.

Another object of the present invention is to provide a lifting device that facilitates positioning and maintaining the position of a mechanism such as a trolley on which a heavy object is suspended.

In addition, the present invention is to provide a lifting device that can be easily adjusted to a position for suspending a heavy object.

The above-described problem to be solved by the present invention is achieved by the lifting device of the present invention, which is suspended by a crane to move and transport the article.

The lifting device of this invention is,

a first beam extending in the longitudinal direction and having first points spaced apart from the center in the longitudinal direction on both sides respectively to be coupled to the crane; a second beam disposed below the first beam and extending in a longitudinal direction; It connects between the second points spaced apart to both sides from the longitudinal center of the first beam and the third points spaced apart from the longitudinal center of the second beam to both sides, and the length is stretched and contracted to adjust the horizontality of the second beam a leveling means configured to do so; a plurality of lifting blocks spaced apart from each other along the longitudinal direction of the second beam and movably installed along the longitudinal direction of the second beam, the plurality of lifting blocks having a suspension point at which the article is suspended; and a positioning mechanism driven to respectively adjust the positions of the lifting blocks in the longitudinal direction of the second beam, wherein the article is suspended and movable by the plurality of lifting blocks.

In this configuration, when the article or the second beam is inclined due to the inclination of the first beam directly suspended on the crane or the weight distribution of the article suspended by the lifting block, the leveling means is connected to the second points of the first beam and Adjusting the distance between the third points of the second beam respectively allows the second beam or article to remain level.

Accordingly, the installation work of the lifting device and the fixing operation of the article can be easily performed without performing several manual tasks for measuring the inclination and correcting the posture of the second beam of the lifting device to maintain the level of the lifting device.

As a further feature of this invention, in the lifting device of this invention,

As a horizontal adjustment means, a hydraulic cylinder may be disposed at a third point of the second beam, respectively, and a piston of the hydraulic cylinder may be respectively coupled to a second point of the first beam.

According to this configuration, it is possible to control the horizontal control of the lifting device by controlling the hydraulic cylinder which performs a simple operation of a relatively easy expansion and contraction operation.

When the horizontal adjustment means is a hydraulic cylinder, the first point and the second point in the first beam are provided at the same position, and a pin penetrating the first beam in the width direction is disposed at the first point, and each A sling wound on the hook of the crane is wound on both ends of the pin, and the piston of the hydraulic cylinder passes through the pin and the tip end is fixed to the pin.

According to such a configuration, the configuration of the lifting device is simplified by implementing the configuration in which the first beam is coupled to the crane and the configuration in which the piston of the hydraulic cylinder is coupled to the first beam as one element called a pin.

The positioning mechanism includes a drive motor and a lead screw rotated by the drive motor, and each lifting block is screwed with the lead screw and moves along the longitudinal direction of the lifting beam according to the rotation of the lead screw to adjust the position It can be configured to be

According to this configuration, a linear movement in the longitudinal direction of the lifting block is implemented through a simple configuration called a lead screw. In particular, after adjusting the position of the lifting block, the lifting block should be fixed in place. Even without a separate fixing means, the lifting block is fixed in place by the lead screw mechanism, so the overall configuration is simple and the lifting block is accidentally positioned there will be no way out of

As a further feature of the invention, the lifting device of the invention comprises:

a wheel for rotating the lead screw, and a clutch installed between the wheel and the lead screw to control transmission of rotational force between the wheel and the lead screw, and rotate the lead screw by manual rotation of the wheel in the longitudinal direction of each lifting block It can be configured that the position is adjusted.

According to this configuration, the position of the lifting block can be adjusted by manual operation of the wheel without rotating the lead screw by the driving motor.

The second beam may be provided with a first position indicating means for illuminating the article with light to indicate the relative position of the article with respect to the second beam. In addition, each lifting block may be provided with a second position indicating means for displaying the relative position of the article with respect to the lifting block by irradiating light to the article.

In this way, by providing a means for indicating a relative position by light irradiation on the lifting block or the second beam, visually confirming the light irradiated to the article and adjusting the position of the article or the position of the lifting block with respect to the second beam The operation is reliable and can be done simply without trial and error.

1 and 2 are a front view and a plan view of a lifting device according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view taken along line A-A in FIG. 1 ;

Fig. 4 is a cross-sectional view taken along line B-B of Fig. 1;

5 is a perspective view showing a positioning mechanism in the lifting device according to the embodiment of the present invention.

Figure 6 is a front view of the lifting device according to the embodiment of the present invention, showing the operation of the lifting device.

Hereinafter, the configuration and operation of a lifting device of an embodiment according to the present invention will be described as detailed contents for carrying out this invention with reference to the accompanying drawings.

In the following description and drawings, it is described and illustrated as a lifting device of an embodiment for carrying the rotor of a turbine rotor for a generator in suspension. However, the turbine rotor rotor as an article to be transported is only an example, and the lifting device of this embodiment may be used for transporting any article suitable for transporting by winding it in a sling. In addition, in addition to the sling, a hook or other mechanism capable of suspending the article may be installed on the lifting block of the lifting device to secure and transport the article.

First, the overall configuration of the lifting device of this embodiment will be described with reference to FIGS. 1 and 2 .

The crane in which the lifting device of this embodiment is used is equipped with a hook 1 as a mechanism for suspending the lifting device, and the hook 1 is provided on both sides of a bar 2 extending downwardly from the crane. 5) to which the ring (3) is formed. Each of the hooks 3 is wound with a sling 5 wound around the lifting device of this embodiment to fix the lifting device to the crane.

However, the lifting device of the present invention can be suspended on the hook 1 of a crane having only one hook without having two hooks 5, and even a crane not equipped with a hook for hanging the sling can use the sling 5 or other It can be suspended on the crane through the means of

However, the lifting device of the present invention is configured so that a wire or a sling or other coupling mechanism fixed to the crane is coupled between a plurality of points of the lifting device and the crane.

In the following description and throughout this specification, unless otherwise defined, the term 'longitudinal direction' refers to a direction in which the second beam (lifting beam of the embodiment), which is an element constituting the lifting device of the present invention, extends, and ' The 'width direction' refers to a direction substantially parallel to the paper surface and perpendicular to the longitudinal direction, and the term "vertical direction" refers to a direction perpendicular to the paper surface.

Broadly classifying the elements constituting the lifting device of this embodiment, the sling beam 10 as a first beam extending in the longitudinal direction and directly coupled to the crane, disposed under the sling beam 10 and extending in the longitudinal direction Lifting beam 20 as a beam, two hydraulic cylinders 30 as horizontal adjustment means installed on the lifting beam 20 and the piston 32 front end is coupled to the sling beam 10, the longitudinal direction of the lifting beam 20 The two lifting blocks 40 and the lifting beam 20 having a suspension point spaced apart from each other along A position adjusting mechanism 50 driven to adjust the position of the lifting block in the .

The sling beam 10 is configured in the form of an elongated beam. Three

sling pins

11 and 12 are coupled to the sling beam 10 penetrating in the width direction. Two sling pins 11 are installed at both ends in the longitudinal direction of the sling beam 10 , and one sling pin 12 is installed in the longitudinal center of the sling beam 10 .

Each sling 5 has one end wound on the sling pin 11 of the sling beam and the other end wound on the hook 3 of the hook 1, so that the sling beam 10 is kept horizontal with respect to the ground. It is suspended on the hook (1) of the crane.

The lifting beam 20 extends long in the longitudinal direction and lies below the sling beam 10 .

The lifting beam 20 has a long channel with a rectangular cross section, and is provided with upper and

lower surfaces

21 and 22 that are parallel and flat to the ground at the upper and lower sides, respectively, so that the lifting device of this embodiment is mounted on these surfaces. The constituent elements are arranged.

The hydraulic cylinder 30 is arranged in the vertical direction on the lower surface 22 of the lifting beam 20 at the same distance on both sides from the center in the longitudinal direction.

Each hydraulic cylinder 30 is disposed on the lower surface 22 of the lifting beam so that the piston 32 extends upwards. The piston 32 penetrates the upper surface 21 of the lifting beam and is inserted into the sling beam 10 and is coupled to the sling pin 11 of the sling beam.

Further, on the lower surface 22 of the lifting beam, a first laser pointer 24 for irradiating a laser beam in a direct direction toward the ground is provided as a first position indicating means.

The first laser pointer 24 is disposed at a central position in the longitudinal direction of the lifting beam, that is, between hydraulic cylinders and irradiates the laser vertically downward. The laser beam irradiated in this way is irradiated to the surface of the turbine rotor rotor 7 .

The operator can immediately grasp the relative position of the turbine rotor and the lifting beam through the laser beam irradiated to the turbine rotor (7).

In particular, the position at which the center of gravity lies on the surface of the turbine rotor 7 is marked in the longitudinal direction, and when the turbine rotor 7 is suspended from the lifting device, the laser light from the first laser pointer 24 is emitted from the turbine rotor. By placing the center of gravity at the marked position, the center of gravity of the turbine rotor 7 can be placed in the longitudinal center of the lifting device.

The coupling relationship between the lifting beam, the sling beam and the sling pin will be described in detail with reference to FIG. 3 together with FIGS. 1 and 2 .

The sling pin 11 is formed in the form of a cylindrical bar as a whole, and a winding groove 111 in which the sling 5 is wound is formed around both ends. Both ends of the sling pin 11 protrude from the width direction of the sling beam 10 so that the winding groove 111 protrudes outward in the width direction of the sling beam 10 to facilitate winding of the sling 5 .

The longitudinal center of the sling pin 11, that is, the through hole 112 penetrating the sling pin 11 in the vertical direction is formed in the center of the width direction with respect to the sling beam 10, and the The peripheral surface of the sling pin 11 at the upper end and the lower end is machined flat.

The piston 32 of the hydraulic cylinder 30 is inserted into the through hole 112 and a nut 321 is fastened to the tip protruding to the upper portion of the sling pin 11 so that the piston 32 is attached to the sling pin 11 . It is fixed.

In this way, the hydraulic cylinder 30 is arranged and coupled to the lower surface 22 of the lifting beam 20 , and the tip of the piston 32 is fixed to the sling pin 11 fixedly installed in the sling beam 10 . A lifting beam 20 is coupled to a sling beam 10 by two hydraulic cylinders 30 .

The winding groove 111 of the sling pin 11 disposed at both ends in the longitudinal direction of the sling beam is the first point where the sling 5 is wound to couple the sling beam 10 to the hook 1 of the crane. do.

The through hole 112 in the center of the sling pin 11 is a second point where the piston 32 of the hydraulic cylinder is coupled to the front end of the hydraulic cylinder and the lifting beam 20 is coupled to the sling beam 10 by the hydraulic cylinder 30 . becomes this In addition, the point at which the hydraulic cylinder 30 is disposed and fixed on the lower surface 22 of the lifting beam 20 becomes the third point.

In this embodiment, since both the first point and the second point on the sling beam 10 are formed on the sling pin 11, the first point and the second point are at the same position in the longitudinal direction.

However, unlike the configuration of this embodiment, the piston 32 of the hydraulic cylinder may be coupled to another point of the sling beam 10 other than the sling pin 11 on which the sling 5 is wound.

However, the first points on the sling beam on which the sling 5 is wound, the second points on the sling beam to which the piston 32 of the hydraulic cylinder is coupled, and the third on the lifting beam where the hydraulic cylinder 30 is coupled The points are respectively provided at points spaced apart on both sides from the longitudinal center of the sling beam and the lifting beam, preferably at the same distance from the longitudinal center.

With this configuration, it is easy to keep the sling beam and the lifting beam in parallel, and it is also easy to maintain the posture of the suspended article along the longitudinal direction of the lifting beam.

The two hydraulic cylinders 30 each operate independently. As the hydraulic cylinder 30 expands and contracts together, the position in the vertical direction of the lifting beam 20 with respect to the sling beam 10 is adjusted, so that it is possible to adjust the height of the lifting beam.

Although the height of the lifting beam 20 is adjusted by the action of elevating the hook 1 in the crane, fine height adjustment is possible by the expansion and contraction of the hydraulic cylinder 30 .

In addition, by adjusting the posture of the lifting beam 20 with respect to the sling beam 10 by expanding and contracting the hydraulic cylinder 30, respectively, the lifting beam or an article suspended on the lifting beam can be leveled or adjusted.

An angle sensor 25 is arranged in the longitudinal center of the lifting beam 20 . The angle sensor 25 measures the inclination of the lifting beam 20, and the measured angle is input to a control module (not shown) that controls the lifting device. The control module changes the inclination of the lifting beam 20 with respect to the sling beam 10 by controlling the expansion and contraction of the hydraulic cylinders 30 on both sides in the longitudinal direction according to the inclination of the lifting beam 20 input from the angle sensor 25 to keep the lifting beam 20 level with respect to the ground.

In this way, the hydraulic cylinder 30 functions as the lifting beam 10 leveling means. The implementation of this function will be described in detail later.

Referring to FIG. 4 together with FIG. 1 , the configuration of the lifting block 40 and the configuration in which the position is variable by being coupled to the lifting beam 20 will be described.

The lifting beam 20 is provided with two lifting blocks 40 on both sides from the center in the longitudinal direction.

The lifting block 40 is configured in the form of a square channel and is disposed on the inside of the body 41 and the body 41 to surround the lifting beam 20, and the upper surface 21 to slide the upper surface 21 of the lifting beam. It has a sliding surface 42 placed on the and an installation surface 43 vertically installed in the longitudinal direction in the main body 41 .

A screw hole 431 to which the lead screw 54 of the positioning mechanism 60 is screwed is formed in the mounting surface 43 through the mounting surface in the longitudinal direction.

A sling pin 45 on which a sling 6 for suspending an article is wound is installed on both sides 411 of the main body. The sling pin 45 has a concave outer circumferential surface so that the sling 6 does not come off. Both ends of the sling 6 are wound on a sling pin 45 , and another sling 8 that wraps around the turbine rotor 7 is caught to suspend the turbine rotor 7 to the lifting block 40 .

The inner side of the main body side 411 is provided with a traveling wheel 46 which is placed on the lower surface 22 of the lifting beam and rotates, so as to facilitate movement of the lifting block 40 in the longitudinal direction of the lifting beam 20 . do.

A second laser pointer 47 is provided on the bottom surface of the main body 41 of the lifting block, and a laser beam is irradiated toward the surface of the turbine rotor 7 . The second laser pointer 47 is disposed at the central position of the sling pin 45 with respect to the longitudinal direction and irradiates the laser beam in the direct direction.

The position of the lifting block 40 with respect to the turbine rotor 7 can be easily adjusted by irradiation of such a laser beam. In particular, when the winding position of the sling 8 for lifting is marked on the turbine rotor 7 , the position of the laser beam irradiated from the second laser pointer 47 is aligned with the position of the lifting block 40 . position can be adjusted.

In addition, on the lower surface 22 side of the lifting beam 20, a position display panel 26 on which a scale for measuring a distance from a longitudinal center position of the lifting beam is displayed is disposed in the longitudinal direction.

Since the main body side 411 of the lifting block is placed at the position of the position display panel 26, the position of the lifting block 40 may be visually confirmed and the position of the lifting block 40 may be manually adjusted through this.

Next, the structure of the position adjustment mechanism 50 which adjusts the position of the lifting block 40 with reference to FIG. 5 together with FIG. 1 and FIG. 2 is demonstrated.

The positioning mechanism 50 adjusts the longitudinal position of the lifting block 40 in the lifting beam 20 . The positioning mechanism 50 is mounted on an installation bracket 57 installed on the upper surface 21 of the lifting beam.

The position adjustment mechanism 50 is screwed to the lifting block 40 to provide a rotating lead screw 54 and a driving motor 51 to provide rotational force to the lead screw, and to decelerate and change the direction of the rotation of the driving motor to form the lead screw ( 54) and a chain wheel 56 and a clutch 55 for manually rotating the lead screw 54 and two

speed reducers

52 and 53.

The drive motor 51 is constituted by a servo motor, and the rotating shaft is disposed in the longitudinal direction. A first reduction gear 52 is coupled to the drive motor 52, and the rotation axis of the drive motor 51 is decelerated while being switched from the longitudinal direction to the width direction by the meshing of the bevel gear.

The second reducer 53 is coupled to the first reducer 52 . The second reducer 53 converts the deceleration and rotation axis direction from the width direction to the longitudinal direction again by rotating the worm gear by the output of the first reducer 52 and rotating the worm wheel placed in the longitudinal direction.

A lead screw 54 is coupled to the output shaft 531 of the second reducer 53 by a coupling 532 , and the lead screw penetrates while being supported by the vertical part 571 of the installation bracket and passes through the lifting block 40 ) is extended toward the longitudinal end of the lifting beam 20 while being screwed with the installation surface 43 of the.

When the drive motor 51 rotates by this configuration, the lead screw 54 rotates so that the lifting block 40 moves on the lifting beam 20 along the longitudinal direction.

A chain wheel 56 is coupled to the input side of the second reduction gear 53 , that is, the worm gear, via a clutch 55 on the opposite side of the wheel on which the drive motor 51 is installed. The chain wheel 56 is installed on the mounting bracket 572 , the axis of rotation lies in the width direction, and protrudes outward in the width direction from the upper surface 21 of the lifting beam 20 .

The chain wheel is rotated by winding the chain on the chain wheel 56 and pulling the wound chain to either side. When the drive motor 51 is used to rotate the lead screw 54, the clutch 55 is short-circuited so that the rotation of the chain wheel 56 is not transmitted to the lead screw, but the chain wheel 56 is used to rotate the lead screw ( When the manual rotation 54 is desired, the clutch 55 is engaged and the lead screw is rotated by the chain wheel 56 .

Accordingly, the position of the lifting block 40 can be manually adjusted by rotating the lead screw 54 by the chain wheel 56 instead of the driving motor 51 .

Hereinafter, with reference to FIG. 6 , an operation of suspending and transporting the turbine rotor 7 with the lifting device of this embodiment will be described.

First, in order to install the lifting device of this embodiment placed on the ground on the crane, the hook 1 of the crane is lowered and the sling 5 is placed between the two sling pins 11 and the hook provided on the sling beam 10, respectively. hang up

Raising the hook 1 raises the lifting device and the lifting beam 20 is transported to the position where the turbine rotor 7 is placed.

The sling beam 10 and the lifting beam 20 are combined with the longitudinal center at the same position, and the sling pins 11 on both sides are spaced apart by the same distance from the longitudinal center, and the slings 5 of the same length. Using , the sling beam 10 and the lifting beam 20 are suspended from the crane in a horizontal posture with respect to the ground.

However, since there may be variations in the length of the sling 5 and there may be variations in the elongation of the slings, the lifting beam may not maintain an accurate horizontal state despite the above conditions.

This inclination of the lifting beam 20 is detected by the angle sensor 25 and the control module extends the hydraulic cylinder 30 on the side from which the lifting beam is lifted up among the hydraulic cylinders 30 so that the piston 32 protrudes. . Accordingly, as the distance between the position of the sling pin 11 to which the tip of the piston 32 is coupled and the position of the lift beam 30 to which the hydraulic cylinder 30 is coupled increases, the lifting beam 20 becomes the hydraulic cylinder 30 ) As the extended side descends downward, the lifting beam 20 becomes horizontal.

6 shows an exaggerated state in which the sling beam 10 is inclined, in fact, the inclination of the sling beam 10 or the lifting beam 20 occurs in a very small range.

The first laser pointer 24 provided on the lifting beam 20 irradiates a laser beam in a direct downward direction, and the laser beam is irradiated to the turbine rotor 7 .

The position of the center of gravity in the longitudinal direction is marked on the turbine rotor 7 , and when the laser beam irradiated from the first laser pointer 24 is irradiated to the position where the center of gravity of the turbine rotor 7 is marked, the lifting device is returned to the position. It can be visually determined that it has been placed.

On the turbine rotor 7, the points suspended by the slings 6 wound on the sling pins 45 of the lifting block 40 are marked on both sides of the longitudinal center, respectively.

A laser beam is irradiated in a direct direction from the second laser pointer 47 of the lifting block 40 . When the laser light is not irradiated to the suspension point of the turbine rotor 7, the positioning mechanism 50 is operated to rotate the lead screw 54 by the drive motor 51, and the lifting block 40 moves in the longitudinal direction. It moves on the lifting beam 20 accordingly.

When the laser beam irradiated from the second laser pointer 47 by this movement is irradiated to the suspension point on the turbine rotor 7 , the movement of the lifting block 40 is stopped and the sling 6 wound on the sling pin 45 . Hang the sling (8) surrounding the turbine rotor (7).

When the positioning of the lifting blocks 40 on both sides and the winding of the

slings

6 and 7 are completed, the crane is operated to raise the hook 1 to lift the turbine rotor 7 from the ground.

By calculating the weight distribution of the turbine rotor, the center of gravity and the winding point of the slings (6, 7) are marked in advance, and a lifting device is placed according to this, and even if the slings (6, 7) are wound, the difference between the calculated and actual weight distribution or other For this reason, the turbine rotor 7 may tilt.

If necessary, the turbine rotor 7 may be leveled by tilting the lifting beam 20 by operating the hydraulic cylinder 30 to maintain the horizontal attitude, and may be leveled by moving the lifting block 40 have.

After such an adjustment operation, the crane is operated to transport the turbine rotor 7 . The turbine rotor 7 can be transported and positioned in a specific position.

At this time, the position of the turbine rotor 7 can move the hook 1 of the crane and raise or lower the hook even when matching the height. However, the height of the turbine rotor 7 may be finely adjusted by adjusting the distance of the lifting beam 20 with respect to the sling beam 10 by extension or contraction of the hydraulic cylinder 30 rather than the operation of the hook 1 . .

On the other hand, the position of the lifting block 40 is adjusted by the rotation of the driving motor 51 according to the irradiation position on the turbine rotor 7 of the laser light irradiated by the second laser pointer 47, but the lifting beam 20 ) It is also possible to calculate and adjust the position of the lifting block through the position display panel 26 displayed on the.

In addition, if necessary, the position of the lifting block 40 may be adjusted by manual operation of the chain wheel 56 by connecting the clutch 55 of the positioning mechanism 50 for precise operation.

The configuration and operation of the lifting device of the embodiment according to the present invention have been described above. The present invention is not limited to these embodiments, and various modifications, variations and additions of elements are possible within the scope described in the claims.

Claims

As a lifting device that is suspended on a crane and moves to transport goods,

a first beam extending in the longitudinal direction and having first points spaced apart from the center in the longitudinal direction on both sides respectively to be coupled to the crane;

a second beam disposed below the first beam and extending in a longitudinal direction;

Connecting between the second points spaced apart to both sides from the longitudinal center of the first beam and the third points spaced apart from the longitudinal center of the second beam to both sides, the length is stretched and contracted to adjust the horizontality of the second beam horizontal adjustment means configured to;

a plurality of lifting blocks spaced apart from each other along the longitudinal direction of the second beam and movably installed along the longitudinal direction of the second beam, the plurality of lifting blocks having a suspension point at which the article is suspended; and

Positioning mechanism driven to respectively adjust the position of the lifting block in the longitudinal direction of the second beam

including,

A lifting device, wherein the article is suspended by a plurality of lifting blocks and movable.
The method according to claim 1,

The first beam is a lifting device, wherein the slings wound on the first points are respectively wound on the hook of the crane and coupled to the crane.
The method according to claim 1,

A lifting device, wherein a hydraulic cylinder is respectively disposed at a third point of the second beam as a leveling means, and a piston of the hydraulic cylinder is respectively coupled to a second point of the first beam.
4. The method of claim 3,

In the first beam, the first point and the second point are provided at the same position, and a pin penetrating the first beam in the width direction is disposed at the first point,

At both ends of each pin, a sling wound on a hook of a crane is wound,

The lifting device, wherein the piston of the hydraulic cylinder passes through the pin and the tip is fixed to the pin.
The method according to claim 1,

The positioning mechanism includes a drive motor and a lead screw rotated by the drive motor, and each lifting block is screwed with the lead screw and moves along the longitudinal direction of the lifting beam according to the rotation of the lead screw to adjust the position The lifting device that becomes.
6. The method of claim 5,

A wheel for rotating the lead screw, and a clutch installed between the wheel and the lead screw to control transmission of rotational force between the wheel and the lead screw,

A lifting device, wherein the longitudinal position of each lifting block is adjusted by rotating the lead screw by manual rotation of the wheel.
7. The method according to any one of claims 1 to 6,

wherein the second beam is provided with first position indicating means for illuminating the article with light to indicate the relative position of the article with respect to the second beam.
7. The method according to any one of claims 1 to 6,

Each lifting block is provided with a second position indicating means for indicating the relative position of the article with respect to the lifting block by irradiating light to the article, the lifting device.