JP3106629B2 - Automatic leveling device for hanging slings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoist such as a crane or the like, which uses a sling or the like to automatically correct the level of a suspended load when lifting an article. The present invention relates to a suspension sling with a built-in mechanism.

[0002]

2. Description of the Related Art Conventionally, a suspended load by a crane or the like is roughly classified into a case where the product is simply moved and a case where the product is assembled or disassembled.

[0003] In the latter case, it is often required to secure the levelness of the suspended load. In this case, the horizontal adjustment of the suspended load was performed by changing the length of the suspension wire.

In such a conventional method, since the center of gravity of the load is measured by eye, a high level of skill is required, and the adjustment of the wire is repeatedly performed while performing the test hanging many times. Was invited.

[0005] Further, the levelness is confirmed using a levelness measuring instrument such as a level, a Y level, and a water level. This method using a level, a Y level, a water level, etc., requires a great deal of man-hours for setup, and requires a large number of people to work with large suspended loads, making it difficult and difficult to obtain safe work experience. . Further, a method is known in which a hanging wire is attached to a beam, and the hanging wire moves and adjusts a hanging point position by rotation of a screw screw based on a signal of a level sensor to automatically level a suspended load. According to this method, when the suspension point position is moved and adjusted, the entire load of the suspended load must be taken into consideration, so that the rotational load of the screw screw becomes large, and the screw drive mechanism becomes large-sized and large, so that this equipment itself is used. There is a drawback that a great deal of time is spent on horizontal adjustment of the camera.

In a lifting device for a lid, there is also known a method in which two rotatable eccentric disks are balanced by manually adjusting the axis thereof at an arbitrary point in a circle around an application point. Have been.

This method requires labor and has a drawback that it is difficult to adjust the work at a high place, in a narrow part, or in a place where a person cannot approach due to the work atmosphere.

[0008]

SUMMARY OF THE INVENTION According to the present invention, in a suspended load operation requiring levelness, a chain block, a turn buckle or the like is put into a conventionally suspended wire portion and the length of the suspended wire is adjusted. , The level of the suspended load had been implemented. This work involves high-altitude work for large products, which has been a safety problem. Further, horizontal adjustment in a narrow part and a place where a person does not approach due to the work atmosphere is difficult and sometimes impossible. In addition, in the method of moving and adjusting the hanging point position of the wire with a base, the automatic leveling equipment becomes large due to the amount of the hanging load, and much time is required for leveling the equipment itself. On top of that, you can only adjust the balance in one direction,
It is not suitable for balance adjustment of a large suspended load having a complicated shape and extending in the horizontal plane direction.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a suspension sling with automatic water balance in a short time and automatically in a plurality of directions.
An object of the present invention is to provide a flatness adjusting device .

[0010]

In order to achieve the above object, according to an embodiment of the present invention, a horizontal sensor and a balancer, a balancer driving motor, and a transfer of a moving driving force of the balancer driving motor to the balancer are provided on the suspension sling. A mechanism such as a clutch and a screw is built in as a means, and a signal from the control panel is received based on a result calculated by an arithmetic circuit based on a detection signal from the sensor, thereby achieving horizontality of the suspension sling in a plurality of directions. A control means for operating a clutch for driving each balancer and a motor for driving the balancer is provided as much as possible.

[0011]

[Function] A horizontal degree of a suspended load is detected by a sensor, and a result calculated by an arithmetic circuit based on a detection signal based on the detection is given to a control panel, and a clutch and a balancer driving motor are operated via the control panel. Then, the independent balancer in the suspension sling is driven to automatically perform the horizontal adjustment of the suspension sling.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the apparatus for automatically adjusting the level of a suspended load according to an embodiment of the present invention, the suspension sling 1 extends in two directions, the XX 'direction and the YY' direction, and the suspension in the XX 'direction. The sling 1 and the hanging sling 1 in the YY ′ direction intersect at the center and are integrated.

At the center intersection of the suspension sling 1, a balancer driving motor 2 and a power transmission gear 4 that receives the rotational driving force of the balancer driving motor 2 via a speed reducer 3 are provided.

The power transmission gear 4 is moved from the center intersection of the suspension sling 1 to the XX 'direction and YY' from the center intersection of the suspension sling 4 via four electromagnetic clutches 5 in four directions.
It is connected to four balancer moving screws 6 in the directions.

The four balancer moving screws 6 are:
The balancer 7 is assembled through the balancer 7 so that the balancer 7 can be moved by the balancer moving screw 6.

The suspension slings in the XX 'direction and the YY' direction are provided with a downward distance sensor 8 and a horizontal sensor 12.

The control panel (with battery) 9 includes a distance sensor 8
And a calculation circuit that receives measurement and detection signals from the horizontal sensor 12, and has a function of controlling the operation of the balancer drive motor 2 and the electromagnetic clutch 5.

The hanging sling 1 is a crane 10
Is used for moving and assembling the product 11 suspended on a slant. When moving and assembling a load installed on an inclined surface, a hanging sling is hung by a crane, and a wire or a lot is transferred from the hanging sling 1 to the load. The load is lifted by several centimeters from the ground or the like, the balancer drive motor is rotated, and the balancer is moved in any direction in the XX ′ direction and the YY ′ direction to control the inclination of the suspension sling 1. By doing so, the inclination of the suspended load can be controlled in a short time to automatically correct the horizontality of the suspended load, and the horizontality of the suspended load can be obtained.

As a result, the working time can be shortened and the accuracy of the working can be obtained, and the work can be performed with high safety.
Also, by alerting the crane operator based on a detection signal exceeding the horizontal level range arbitrarily set in advance,
Since the pass / fail judgment of the movement of the suspended load, the assembling work, and the like can be understood, the skill can not necessarily be required, and the limited range of the type of the suspended load can be expanded, and the use as a general-purpose machine can be realized.

Further, in a place where the radiation dose is high and the working environment is bad in the nuclear power, the worker does not approach the vicinity of the suspended load, so that the exposure can be greatly reduced.

Hereinafter, embodiments of the present invention will be described in more detail.

According to the present invention, the balancer driving mechanism incorporated in the suspension sling is electrically controlled to correct the level of the suspended load.

In FIG. 1, the hanging sling 1 is hung by a crane 10, the product 11 is connected to the hanging sling 1 by a wire, and the product 11 is grounded (lifted by several cm). In this state, several horizontal sensors 12 are used. At the same time as measuring the level of the hanging sling 1, the distance between the hanging sling 1 and the ground surface (ground surface) is measured by several distance sensors 8, and the two directions of the XX 'direction and the YY' direction are measured. Each of the measured values by the distance sensor 8 near both ends is sent to the control panel 9 to correspond to the balancer 7 which needs to be moved to obtain a horizontal balance in two directions of XX 'and YY'. When several electromagnetic clutches 5 are actuated and the signal from the control panel 9 is received, the balancer driving motor 2 is driven, and the screw 6 is rotated via the reduction gear 3 and the transmission gear 4 to be independently driven. Sequentially change the balancer 7 to X It moves in two directions, X 'direction and YY' direction. The direction of movement and the amount of movement are determined by an arithmetic circuit based on the value measured by the distance sensor 8 and determined by the control panel 9 based on the arithmetic result. To control the balancer driving motor 2. This is an automatic device for automatically adjusting the level of the product 11 thus lifted.
Lighter and smaller than those using book slings,
It is possible to shorten the working time and perform the hanging work with high accuracy and safety.

When the suspended load is placed on the slope ground,
If the movement of the balancer is set based on the value detected by the distance sensor, the original purpose cannot be achieved.

In such a case, the hanging sling XX '
The horizontal sensor 12 built-in near both ends in the two directions of the direction and the YY 'direction has priority over the distance sensor 8, and the balancer is set to move according to the horizontal detection value, and the suspended load is automatically adjusted, so that the lightweight and compact automatic horizontal A degree adjustment device.

In this case, the balancer 7 is moved in the XX 'direction and the Y direction.
The direction of movement and the amount of movement in the two directions of -Y 'direction are obtained by an arithmetic circuit based on a detection signal for detecting the degree of horizontality of the horizontal sensor 12, and are used for the balancer driving based on the arithmetic result from the control panel 9. The motor 2 is controlled. As a result, the horizontal of the hanging sling 1 and the product suspended from the hanging sling 1 are maintained in two directions of the XX 'direction and the YY' direction without being affected by the slope of the slope ground.

When it is necessary to finely adjust the suspended load under radiation control or at the time of assembling important products, the horizontal level is set in advance according to the work importance, and the set horizontal level range and XX ′ are set. The operation circuit compares the horizontal level of the hanging sling 1 in the two directions YY ′ with the arithmetic circuit, and within the set horizontal level range, the two directions of the XX ′ direction and the YY ′ direction of the hanging sling 1. The balancer is moved so that the horizontal level can be maintained, and the horizontal level accuracy of the suspended load is maintained at a certain level or more.

If a signal exceeding a certain range or more is detected, an alarm is generated based on the detected signal, and the operator is alerted to readjust the suspension fine adjustment balance. Skills such as assembly work and product galling prevention are not required.

[0029]

According to the present invention, the horizontality of the hanging sling in a plurality of directions can be determined in a short time by the detection value of the sensor .
One order can be automatically adjusted, even if the work environment that is difficult to approach the worse hanging the work site, or decomposition of difficult products identified in complex shapes and viewing the interior, even in the assembly work, skilled hanging work Work safely and efficiently without the need for

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of an apparatus for automatically leveling a suspended load according to the present invention.

FIG. 2 is a cross-sectional view of an apparatus for automatically leveling a suspended load according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Suspension sling, 2 ... Balancer drive motor, 3 ... Reduction gear, 4 ... Transmission gear, 5 ... Electromagnetic clutch, 6 ... Screw, 7 ... Balancer, 8 ... Distance sensor, 9 ... Control panel, 10
... crane, 11 ... product, 12 ... horizontal sensor.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-147060 (JP, A) JP-A 64-3781 (JP, U) JP-A-3-51794 (JP, U) (58) Investigation Field (Int.Cl. ⁷ , DB name) B66C 13/08

Claims (2)

(57) [Claims] A plurality of suspension slings provided integrally with each other in an intersecting manner, and an intersection of said plurality of suspension slings.
The motor provided is extended in one direction through the intersection.
On both sides from the intersection in the hanging sling
It is provided movably at the part extending toward the end
Each balancer that, parts that extend toward the end of the two side
The intersection and the hanging sling.
Driving means for said Before moving independently each balancer between the end of the grayed, respectively coupled to said drive means, said motor
Electromagnetic clutch that transmits the torque of the motor to the corresponding drive means.
Switch, a horizontal sensor or a distance sensor that is dispersed in each of the plurality of directions and is equipped with the hanging sling and a measuring direction is directed downward when the hanging sling is used, and a signal from the horizontal sensor or the distance sensor. Based on the electromagnetic
An automatic leveling device for a hanging sling, comprising: control means for operating a latch to drive the motor . 2. A system according to claim 1, further comprising a means for generating an alarm based on the detected signal and alerting an operator when a signal exceeding a predetermined horizontal level range is detected. Automatic leveling device for hanging slings.