KR102385064B1 - Hoist device for crane - Google Patents

Abstract

The present invention relates to a hoist device for a crane, and the head block 210 and the first to eight sheaves (220a to 220h), the wire drums (230 and 230'), the first to eighth rope fixtures (240a to 240h), the first to It is composed of 8 wire ropes (250a to 250h) and a driving unit (260).
According to this embodiment, as the load is applied to each of the first to eighth wire ropes of 16 strands when the container is lifted, the effect of dispersing the load can be expected, and the left and right wire drums through the first to eighth wire ropes Since the applied load can also be remarkably reduced compared to the prior art, the diameters of the 1st to 8th wire ropes, the left and right wire drums and the 1st to 8th sheaves can be made small, which is advantageous for miniaturization.

Description

Hoist device for crane

The present invention relates to a hoist device for a crane, and more particularly, to a hoist device for a crane that is improved to miniaturize a wire rope, a wire drum, a sheave, and a drive unit.

In general, a container crane for transporting containers is a loading and unloading equipment for loading and unloading containers between a ship and a wharf.

Therefore, in order to quickly cope with the rapidly changing international logistics environment due to the recent enlargement of container ships, the precision and speed of container transportation are more required.

Looking at the process of unloading a container in the prior art, first, a container loaded on a ship through a trolley is vertically raised and moved in a horizontal direction, and then the container is vertically lowered to a location where the vehicle is located and loaded.

1 is a schematic view showing a conventional crane.

Referring to Figure 1, the conventional crane (1) is a trolley 100 for reciprocating along the boom (3) installed in the orthogonal direction of the post (2), and the trolley 100 is disposed under the trolley (100) It is composed of a hoist 200 that moves along the boom (2) with and ascends and descends in the vertical direction.

The hoist 200 is largely composed of a head block connected to a spreader, eight wire ropes having one end fixed to the front, rear, left and right sides, respectively, and the other end fixed to the wire drum, respectively, and a sheave for guiding the wire rope , a wire drum that elevates the head block by winding or unwinding a wire rope, and a drive unit that transmits driving force to the wire drum, which is composed of a drive motor, brake, and speed reducer.

On the other hand, the conventional hoist has the following serious problems. Once 8 wire ropes are connected to one wire drum, the load of the container is concentrated on one wire drum through the 8 wire ropes. The size of the wire drum as well as the diameter of the wire rope and the sheave guiding the wire rope were relatively large, which made it very difficult to miniaturize the product.

In addition, as the size of the wire drum increases, there is a problem in that the size of the driving unit for driving the wire drum becomes relatively large, and accordingly, the selection of the manufacturer has to be limited.

Moreover, as the drive motor of the drive unit for driving the wire drum is configured as a single drive motor, there is a serious problem that the crane operation cannot be performed when the drive motor does not operate (failure).

1. Republic of Korea Patent No. 10-1112156 (2012.2.22)

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a hoist device for a crane capable of miniaturizing a wire rope, a wire drum, a sheave, and a driving unit.

Another object of the present invention is to provide a hoist device for a crane capable of performing a crane operation using the other one even if one is broken by manufacturing a pair of driving motors.

Another object of the present invention is to provide a hoist device for a crane capable of emergency measures so that a crane operation can be carried out using a geared motor even if a pair of driving motors are both broken.

The present invention for achieving the above object,

In the hoist device for a crane, which is disposed under the trolley for reciprocating along the boom of the crane and consists of a hoist that moves along the boom with the trolley and ascends and descends in the vertical direction,

The hoist is

A plate-shaped head block disposed under the trolley and ascending and descending in the vertical direction;

First and second sheaves disposed in parallel on the upper surface of the left end of the head block and spaced apart from each other;

A third and fourth sheave disposed in parallel on the upper surface of the right end of the head block and spaced apart from each other;

5th and 6th sheave disposed in parallel on the upper surface of the front end of the head block and spaced apart from each other;

7th and 8th sheave disposed in parallel on the upper surface of the rear end of the head block and spaced apart from each other;

a wire drum disposed on the upper part of the trolley to face each other left and right with respect to the boom;

First and second rope fasteners respectively arranged in front and rear of the left wire drum and fixed to the trolley;

Third and fourth rope fasteners respectively arranged in front and rear of the right wire drum and fixed to the trolley;

5 and 6 rope fixtures disposed between the wire drums, respectively located on the upper portions of the 5 and 6 sheave, and fixed to the trolley;

7th and 8th rope fasteners disposed between the wire drums, respectively located on the upper parts of the 7th and 8th sheaves, and fixed to the trolley;

a first wire rope having one end fixed to the first rope fixture and the other end fixed to the left wire drum via the first sheave, and elevating the head block by winding or unwinding the left wire drum;

a second wire rope having one end fixed to the second rope fixture and the other end fixed to the left wire drum via a second sheave, and elevating the head block by winding or unwinding the left wire drum;

a third wire rope having one end fixed to the third rope fixture and the other end fixed to the right wire drum via a third sheave, and elevating the head block by winding or unwinding it on the right wire drum;

a fourth wire rope having one end fixed to the fourth rope fixture and the other end fixed to the right wire drum via a fourth sheave, and elevating the head block by winding or unwinding it on the right wire drum;

a fifth wire rope having one end fixed to the fifth rope fixture and the other end fixed to the right wire drum via a fifth sheave, and elevating the head block by winding or unwinding it on the right wire drum;

a sixth wire rope having one end fixed to the sixth rope fixture and the other end fixed to the right wire drum via the sixth sheave, and elevating the head block by winding or unwinding the right wire drum;

a seventh wire rope having one end fixed to the seventh rope fixture and the other end fixed to the right wire drum via the seventh sheave, and elevating the head block by winding or unwinding it on the right wire drum;

an eighth wire rope having one end fixed to the eighth rope fixture and the other end fixed to the left wire drum via the eighth sheave, and elevating the head block by winding or unwinding the left wire drum;

and a driving unit that rotates the wire drum in a forward and reverse direction.

Here, the driving unit is

a driving motor installed on the left and right wire drums, respectively, to provide driving force;

a speed reducer installed between the left and right wire drums and the drive motor to reduce the rotational speed of the drive motor and transmit it to the left and right wire drums;

a shaft connecting device interconnecting the speed reducer;

and a brake installed between the driving motor and the speed reducer to stop the rotation of the driving motor.

Also, the present invention is characterized in that a geared motor that is installed in any one of the reduction gears and provides a driving force in case of a failure of the driving motor is further provided with reinforcement.

Here, the shaft connection device,

shafts each drawn out from the reduction gear;

It is characterized in that it is composed of a coupling that interconnects the shafts.

According to this embodiment, as the load is applied to each of the first to eighth wire ropes of 16 strands when the container is lifted, the effect of dispersing the load can be expected, and the left and right wire drums through the first to eighth wire ropes Since the applied load can also be remarkably reduced compared to the prior art, the diameters of the 1st to 8th wire ropes, the left and right wire drums and the 1st to 8th sheaves can be made small, which is advantageous for miniaturization.

In addition, as the load applied to the left and right wire drums is reduced, the rotational torque of the left and right wire drums can be greatly reduced, and accordingly, the drive unit that drives the left and right wire drums can be manufactured in a compact size. There is an advantage that the range of selection of companies that manufacture parts is considerably widened.

In addition, even if any one of the drive motors constituting the drive unit fails, since the speed reducer is interconnected through the shaft connection device, the driving force can be transmitted to the left and right wire drums using the remaining drive motors, which increases the convenience of use. It has the advantage of being greatly strengthened.

In addition, by reinforcing the geared motor with the configuration of the drive unit, even if all the drive motors fail, emergency measures can be taken using the geared motor, making it easy to respond to emergency situations There is an advantage.

1 is a schematic view showing a conventional crane.
Figure 2 is a perspective view of a hoist device for a crane according to the present invention.
Figure 3 is a front view of the hoist device for a crane according to the present invention.
Figure 4 is a side view of the hoist device for a crane according to the present invention.
Figure 5 is a plan view of the hoist device for a crane according to the present invention.

Hereinafter, it will be described in detail based on the accompanying drawings.

Figure 2 is a perspective view of a hoist device for a crane according to the present invention, Figure 3 is a front view of the hoist device for a crane according to the present invention, Figure 4 is a side view of the hoist device for a crane according to the present invention, Figure 5 is the present invention It is a plan view of a hoist device for a crane according to

2 to 5, the crane hoist device 200 according to an embodiment, the head block 210 and the first to eight sheaves (220a to 220h), the wire drums (230, 230'), the first to It is composed of 8 rope fixtures (240a to 240h), first to 8 wire ropes (250a to 250h) and a driving unit 260. According to this, the load applied per wire rope can be reduced, so that the diameter and wire drum of the wire rope and The size of each sheave can be given relatively and the load applied to the wire drum can be distributed, so that the wire drum can be made small. It has this relatively wide characteristic.

2 to 5, the head block 210 is a rectangular plate material, in the present embodiment, is disposed under the trolley 100 to ascend and descend in the vertical direction.

For example, a spreader capable of picking up or placing a container is installed at a lower portion of the head block 210 .

2 to 4, the first to eight sheaves 220a to 220h are respectively installed at the left and right ends and the front and rear ends of the head block 210. same as

The first and second sheave (220a, 220b) are disposed in parallel on the upper surface of the left end of the head block 210 and installed to be spaced apart from each other, and the third and fourth sheave (220c, 220d) is the right end of the head block 210 The fifth and sixth sheaves (220e, 220f) are disposed side by side on the upper surface of the front end of the head block 210 and are spaced apart from each other, and the seventh and eighth sheaves (220g, 220h) is arranged in parallel on the upper surface of the rear end of the head block 210 and is installed to be spaced apart from each other.

2 to 5 , the wire drums 230 and 230 ′ are installed to be disposed on the upper portion of the trolley 100 so as to be opposed to each other left and right with respect to the boom (2: see FIG. 1A ), which will be described later. It serves to wind or unwind the first to eighth wire ropes 250a to 250h so that the head block 210 can be raised and lowered by receiving the driving force from the driving unit 260 .

2 to 5, the first to eighth rope fasteners 240a to 240h are fixing means for fixing the first to eighth wire ropes 250a to 250h, and the first and second rope fasteners 240a to 240b) is respectively arranged in front and rear of the left wire drum 230 and fixed to the trolley 100, and the third and fourth rope fasteners 240c and 240d are front and rear of the right wire drum 230', respectively. It is arranged and fixed to the trolley 100, and the fifth and sixth rope fasteners 240e and 240f are disposed between the wire drums 230 and 230', respectively, located on the upper portions of the fifth and sixth sheaves 220e and 220f, and the trolley 100 ), and the seventh and eighth rope fasteners 240g and 240h are disposed between the wire drums 230 and 230', respectively located on the upper portions of the seventh and eighth sheaves 220g and 220h, and are fixed to the trolley 100.

2 to 5, one end of the first to eighth wire ropes 250a to 250h is fixed to the wire drums 230 and 230', and the other end is removed via the first to eighth sheave 220a to 220h. 1 to 8 are fixed to the rope fixtures 240a to 240h, respectively, and by winding or unwinding the wire drums 230 and 230', serves to elevate the head block 210 in the vertical direction.

To explain this in more detail, the first wire rope 250a has one end fixed to the first rope fixture 240a and the other end fixed to the left wire drum 230 via the first sheave 220a to the left. By winding or unwinding the wire drum 230, the head block 210 is raised and lowered.

The second wire rope 250b has one end fixed to the second rope fixture 240b and the other end fixed to the left wire drum 230 via the second sheave 220b and wound around the left wire drum 230 or As the release, the head block 210 is raised and lowered.

Here, when the installation form of the first wire rope 250a and the second wire rope 250b is viewed from the left side, they are symmetrical to each other in a 'V' shape.

One end of the third wire rope 250c is fixed to the third rope fixture 240c, and the other end is fixed to the right wire drum 230' via the third sheave 220c, and to the right wire drum 230'. The head block 210 is raised and lowered by winding or unwinding.

The fourth wire rope 250d has one end fixed to the fourth rope fixture 240d and the other end fixed to the right wire drum 230' via the fourth sheave 220d to the right wire drum 230'. The head block 210 is raised and lowered by winding or unwinding.

Here, when the installation form of the third wire rope 250c and the fourth wire rope 250d is viewed from the right side, they are symmetrical to each other in a 'V' shape.

The fifth wire rope 250e has one end fixed to the fifth rope fixture 240e and the other end fixed to the left wire drum 230 via the fifth sheave 220e and wound around the left wire drum 230 or By releasing, the head block 210 is raised and lowered.

The sixth wire rope 250f has one end fixed to the sixth rope fixture 240f, and the other end is fixed to the right wire drum 230' via the sixth sheave 220f, to the right wire drum 230'. The head block 210 is raised and lowered by winding or unwinding.

The seventh wire rope (250g) has one end fixed to the seventh rope fixture (240g) and the other end fixed to the right wire drum 230' via the seventh sheave (220g) to the right wire drum 230'. The head block 210 is raised and lowered by winding or unwinding.

The eighth wire rope 250h has one end fixed to the eighth rope fixture 240h and the other end fixed to the left wire drum 230 via the eighth sheave 220h and wound around the left wire drum 230 or By releasing, the head block 210 is raised and lowered.

Here, when the installation form of the fifth wire rope 250e, the sixth wire rope 250f, and the seventh wire rope 250g and the eighth wire rope 250h is seen from the front or the rear side, each other is 'V' shaped symmetrical in shape.

For reference, as shown in FIGS. 3 and 4, when the head block 210 is at a specific height, the first to eighth wire ropes 250a to 250h form a 'V'-shaped angle (θ1=θ2). =θ3=θ4) are all the same.

Referring to FIG. 5 , the driving unit 260 includes driving motors 261,261 ′, reduction gears 262 and 262 ′, a shaft coupling device 263 , and brakes 264 and 264 ′, and in this embodiment, wire drums 230 and 230 . ') to rotate in the forward and reverse direction.

As an example, the driving motors 261,261' are respectively connected to the wire drums 230 and 230' to provide driving force to the wire drums 230 and 230' so that the wire drums 230 and 230' rotate in the forward and reverse directions.

As an example, the reducers 262 and 262' are respectively installed between the left and right wire drums 230 and 230' and the driving motors 261,261' to reduce the rotational speed of the driving motors 261,261' to reduce the left and right wire drums ( 230, 230')).

As an example, the shaft connecting device 263 is a device for interconnecting the speed reducers 262 and 262 ′, and is interconnected via a shaft 263a and a coupling 263b drawn from the speed reducers 262 and 262 ′, respectively.

Here, only one of the driving motors 261,261' may be applied, or two may be applied as in the present invention.

For example, even if the drive motor 261 connected to the left wire drum 230 among the drive motors 261,261' fails, since the reducers 262 and 262' are interconnected via the shaft connection device 263, the right wire The driving force of the driving motor 261 ′ connected to the drum 230 ′ may be transmitted to the left wire drum 230 .

As an example, the brakes 264 and 264' are brake devices installed between the driving motors 261,261' and the speed reducers 262 and 262' to stop the rotation of the driving motors 261,261'.

On the other hand, it can be used even if any one of the driving motors 261,261' is broken, but if all of the driving motors 261,261' are broken, there is a problem in that the hoist 200 cannot be moved at all.

Accordingly, in the present embodiment, the geared motor 265 is installed in any one of the speed reducers 262 and 262' to solve the above problems.

The geared motor 265 is a known device in which an electric motor and a speed reducer are combined into one. In the present embodiment, the geared motor 265 is operated when the driving motors 261,261 ′ fail by operating to apply driving force to the left and right wire drums 230 and 230 ′. ) to transmit.

As an example, when the geared motor 265 is operated, the driving force is transmitted to the reducers 262 and 262' interconnected via the shaft connection device 263, and left and right wire drums connected to the reducers 262 and 262' ( 230 and 230') so that the left and right wire drums 230 and 230' can rotate in the forward and reverse directions.

As such, even if all of the driving motors 261,261 ′ fail, emergency measures can be taken using the geared motor 265 , so it is possible to easily respond to an emergency situation, thereby greatly enhancing operational convenience.

The effect of the present invention having the above configuration will be described as follows.

The loading and unloading of containers (not shown) may be performed using the hoist 200 of the present invention, which will be described in more detail as follows.

First, when a spreader (not shown) installed under the head block 210 grips the container, the driving motors 261,261 ′ constituting the driving unit 260 operate.

The driving force generated from the driving motors 261,261' is transmitted to the reducers 262 and 262' interconnected via the shaft connection device 263, and the reducers 262 and 262' reduce the rotational speed of the driving motors 261,261'. It is transferred to the left and right wire drums 230 and 230', and the left and right wire drums 230 and 230' are rotated.

As the left and right wire drums 230 and 230' rotate, the first to eighth wire ropes 250a to 250h respectively connected to the left and right wire drums 230 and 230' are wound around the left and right wire drums 230 and 230'. As the first to eighth wire ropes (250a to 250h) are wound around the left and right wire drums 230 and 230' and shortened, the first to eighth wire ropes (250a to 250h) become the first to eight sheaves 220a to 220h. ) is lifted, and due to this, the container gripped by the spreader (not shown) rises as the head block 210 naturally ascends and descends upward.

On the other hand, if you want to lower the container held by the spreader (not shown), you can proceed in the reverse order of the above method.

According to this embodiment, as the load is applied to each of the 16 first to 8 wire ropes (250a to 250h) when the container is lifted as described above, the effect of dispersing the load can be expected, and the first to 8 wire ropes can be expected. Since the load applied to the left and right wire drums 230 and 230' through (250a to 250h) can also be remarkably reduced compared to the prior art, the 1st to 8th wire ropes (250a to 250h) and the left and right wire drums 230 and 230 ') and the first to eight sheaves (220a to 220h) can be made small in diameter, which is advantageous for miniaturization.

In addition, as the load applied to the left and right wire drums 230 and 230' is reduced, the rotational torque of the left and right wire drums 230 and 230' can be greatly reduced, and accordingly, the left and right wire drums 230 and 230' Since the driving unit 260 for driving the motor can be manufactured in a small size, there is an advantage in that the selection of companies for manufacturing the corresponding parts is considerably widened.

In addition, even if any one of the driving motors 261,261' constituting the driving unit 260 fails, since the reducers 262 and 262' are interconnected via the shaft connecting device 263, the remaining driving motors 261,261' ) can be used to transmit the driving force to the left and right wire drums 230 and 230', so there is an advantage of greatly enhancing the convenience of use.

In addition, by reinforcing the geared motor 265 with the configuration of the driving unit 260 , even if all the driving motors 261,261 ′ fail, emergency measures can be taken using the geared motor 265 , so it is easy to respond to an emergency situation. This is possible, and accordingly, there is an advantage of greatly enhancing operational convenience.

Although the present invention has been described in detail only with respect to the specific embodiments described, it is natural for those skilled in the art that various changes and modifications can be made within the technical spirit of the present invention, and it is natural that such variations and modifications belong to the appended claims.

1: Crane 2: Shoring 3: Boom
100: trolley 200: hoist 210: head block
220a~220h: 1st~8th sheave 230,230': wire drum
240a to 240h: 1st to 8th rope fixture 250a to 250h: 1st to 8th wire rope
260: drive unit 261,261': drive motor 262,262': reducer
263: shaft coupling device 264,264': brake 265: geared motor

Claims (4)

It is disposed under the trolley 100 that reciprocates along the boom 2 of the crane 1 and moves along the boom 2 together with the trolley 100 for a crane consisting of a hoist 200 that ascends and descends in the vertical direction. In the hoist device,
The hoist 200,
A plate-shaped head block 210 disposed under the trolley 100 and ascending and descending in the vertical direction;
First and second sheave (220a, 220b) disposed in parallel on the upper surface of the left end of the head block 210 and spaced apart from each other;
The third and fourth sheaves 220c and 220d disposed in parallel on the upper surface of the right end of the head block 210 and spaced apart from each other,
5 and 6 sheaves (220e, 220f) disposed in parallel on the upper surface of the front end of the head block 210 and spaced apart from each other;
The seventh and eighth sheaves (220g, 220h) disposed in parallel on the upper surface of the rear end of the head block 210 and spaced apart from each other;
Wire drums 230 and 230' disposed on the upper portion of the trolley 100 to face each other left and right with respect to the boom 2,
First and second rope fasteners 240a and 240b respectively disposed in front and rear of the left wire drum 230 and fixed to the trolley 100;
Third and fourth rope fasteners 240c and 240d respectively disposed in front and rear of the right wire drum 230' and fixed to the trolley 100;
5 and 6 rope fasteners 240e and 240f which are disposed between the wire drums 230 and 230', respectively located on the upper portions of the fifth and sixth sheaves 220e and 220f and are fixed to the trolley 100;
The seventh and eighth rope fixtures (240g, 240h) disposed between the wire drums (230 and 230'), respectively located on the upper parts of the seventh and eighth sheave (220g, 220h) and fixed to the trolley (100);
One end is fixed to the first rope fixture 240a, and the other end is fixed to the left wire drum 230 via the first sheave 220a. A first wire rope (250a) for elevating and,
One end is fixed to the second rope fixture 240b, and the other end is fixed to the left wire drum 230 via the second sheave 220b. And a second wire rope (250b) for elevating,
One end is fixed to the third rope fixture 240c and the other end is fixed to the right wire drum 230' via the third sheave 220c, and the head block 210 by winding or unwinding the right wire drum 230'. ) and a third wire rope (250c) for elevating,
One end is fixed to the fourth rope fixture 240d and the other end is fixed to the right wire drum 230' via the fourth sheave 220d, and the head block 210 is wound or unwound on the right wire drum 230'. ) and a fourth wire rope (250d) for elevating,
One end is fixed to the fifth rope fixture 240e and the other end is fixed to the right wire drum 230' via the fifth sheave 220e, and the head block 210 is wound or unwound on the right wire drum 230'. ) and a fifth wire rope (250e) for elevating,
One end is fixed to the sixth rope fixture 240f and the other end is fixed to the right wire drum 230' via the sixth sheave 220f, and the head block 210 is wound or unwound on the right wire drum 230'. ) and a sixth wire rope (250f) for elevating,
One end is fixed to the seventh rope fixture 240g and the other end is fixed to the right wire drum 230' via the seventh sheave 220g, and the head block 210 by winding or unwinding the right wire drum 230'. ) and a seventh wire rope (250g) for elevating,
One end is fixed to the eighth rope fixture 240h, the other end is fixed to the left wire drum 230 via the eighth sheave 220h, and the head block 210 is wound around or unwound by the left wire drum 230. And the eighth wire rope (250h) for elevating,
It consists of a driving unit 260 for rotating the wire drums 230 and 230' in forward and reverse directions,
The driving unit 260,
Driving motors 261,261' respectively installed on the left and right wire drums 230 and 230' to provide driving force;
Reducers 262 and 262' respectively installed between the left and right wire drums 230 and 230' and the driving motors 261,261' to reduce the rotational speed of the driving motors 261,261' and deliver them to the left and right wire drums 230 and 230' )Wow,
and a shaft connecting device 263 for interconnecting the reduction gears 262 and 262';
A hoist device for a crane, characterized in that it is installed between the drive motor (261,261') and the speed reducer (262, 262') and consists of brakes (264, 264') for stopping the rotation of the drive motor (261,261').
According to claim 1,
A hoist device for a crane, characterized in that the geared motor 265 which is installed in any one of the reduction gears 262 and 262' and provides driving force when the driving motor 261,261' fails is further provided with reinforcement.
The method of claim 1,
The shaft connection device 263 is,
Shafts 263a each drawn out from the reducers 262 and 262',
The hoist device for a crane, characterized in that; consisting of a coupling (263b) for interconnecting the shaft (263a). delete

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