JPH06305683A - Load hoisting device for crane - Google Patents

Abstract

PURPOSE:To move a hoisted load to the end of a hoisting beam while keeping it horizontally by keeping its stability during the transport by hoisting the load at the center of the hoisting beam and, as required, moving the hoisted load and the balance weight relatively to each other when the load is hoisted. CONSTITUTION:A load hoisting device for crane is provided with a hoisting beam 1 at the center of which a frame 2 locked to a hook block 3 is installed, a balance weight 7 and a trolley 11 arranged free to travel along the longitudinal direction of the hoisting beam 1, a hoisting base 18 which is installed at the lower side of the trolley 11 and from which a load hoisting wire rope (w) is suspended, travel motors 8 and 14 for the balance weight 7 and the trolley 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane hoisting device capable of drawing a hoisting load to be lifted by a crane into a building.

[0002]

2. Description of the Related Art In constructing buildings such as buildings and condominiums, materials are hoisted by a crane or the like. However, this is the case when materials are unloaded from the ground and pulled up to the corresponding floor, or vice versa. But the outer wall of the building,
Beams will be an obstacle, so they must be moved horizontally from the hanging position and taken in and out of the floor above the floor.

For this reason, the material is moved in the horizontal direction by using ropes or chain blocks, but it is not only inefficient but also there is a problem in terms of safety.

For this reason, for example, Japanese Unexamined Patent Publication No. 60-20208
The lifting device disclosed in Japanese Patent Publication No. 4 (Int.Cl.B66c 13/08) is used. This thing is designed to move the suspended load in parallel through the suspended beam device suspended on the crane, suspending the suspended load from the hanging position of the crane to the tip of the beam that cantilevered, By rotating the beam at the desired height, the suspended load can be moved to the recessed position.

[0005]

However, in this hoisting device, since the hoisting load is far from the center of the crane hook, a large load is applied to the other end of the beam in order to balance the weight of the hoisting load. Since it is necessary to arrange a weight balance weight, the weight of the device itself becomes significantly heavy, and the supporting point of the load and balance weight for the suspension beam is fixed from the beginning for balance adjustment, and the horizontal length is Because of the long length, the beam must be swung frequently to prevent it from colliding with an obstacle, and it is difficult to suspend the beam at the most stable beam center due to the presence of the balance weight. It was

The present invention has been made to solve the above problems, and its object is to maintain stability during transportation by suspending a suspended load at the center of a suspended beam, and to suspend the suspended load and the balance weight as necessary. (EN) Provided is a crane lifting device capable of moving a hanging load to the end side of a hanging beam while maintaining the level.

[0007]

In order to achieve the above object, the present invention provides a suspension beam having a frame to be engaged with a hook block provided at the center, and a suspension beam that can travel along the longitudinal direction of the suspension beam. A balance weight and a trolley that are arranged, a hoisting platform that is provided below the trolley and that hangs hoisting wires, and a traveling drive motor for the balance weight and the trolley are provided.

Further, in the present invention, the balance weight may be fixed to an end portion of an arm movably inserted into the suspension beam. Furthermore, a configuration in which the hoisting platform is supported under the trolley so as to be rotatable, and a configuration in which the hoisting device for the hoisting wire is arranged can also be adopted.

[0009]

With the above construction, the suspended load can be hung at the center of the crane hook if the trolley is moved to the center and the balance weight is positioned at the center of the hanging beam when hoisting. At the transport position, the suspended load and the balance weight are moved relative to each other to move the suspended load toward the end of the suspended beam while keeping the horizontal position, so that the suspended beam can be pulled in.

When the balance weight is provided at the end of the arm that slides in the suspension beam, the moment during movement adjustment can be increased and the balance adjustment range can be expanded. In addition, when the hoisting platform can be turned, it is possible to change the posture of the hoisting load.In addition, when a hoisting device for wire for hoisting load is provided, the vertical position of the hoisting load can be adjusted regardless of the vertical position of the crane. It can be performed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

1 to 3 show a hoisting device according to the present invention, in which 1 is a hanging beam in which a pair of I-shaped steels 1a are arranged in parallel, 2 is a central part of the hanging beam 1, and the lower end is Each is a gate-shaped frame welded to the I-shaped steel 1a,
On the top of the frame 2, a hanging metal fitting 4 which is slung on a crane hook 3 is integrally provided.

An arm 6 is slidably inserted inside the suspension beam 1 through a pair of left and right rollers 5 rolling along the inner web of each I-shaped steel 1a.

A balance weight 7 is formed integrally with the end of the suspension beam 1 of the arm 6 and is large enough to fit in the inner space of the frame 2. The motor 8 is arranged.

The motor 8 has a pinion 1 mounted on a rack 9 fixed along the upper surface of the inner web of one I-shaped steel 1a.
The arm 6 is meshed via 0, and the arm 6 can be moved along the longitudinal direction of the suspension beam 1 in accordance with the forward and reverse rotation of the motor 8.

A trolley 11 suspended along the outer side of the I-shaped steel 1a is arranged outside the suspension beam 2. Inside the trolley 11, a pair of left and right rollers 12 rolling along the lower surface of the outer web of the I-shaped steel 1a are provided, and a traveling motor 14 is arranged on one side.

This motor 14 meshes with a rack 15 fixed along the lower surface of the outer web of one I-shaped steel 1a via a pinion 16, and the trolley 11 suspends the trolley 11 with the forward and reverse rotation of the motor 14. It is movable along the longitudinal direction from the center to one end side. As a matter of course, both the arm 6 and the trolley 11 are provided with stoppers or the like for preventing the arms 6 and the trolley 11 from falling off from the suspension beam 1.

A central shaft 17 is provided at the lower part of the trolley 11, and a hanging platform 18 is rotatably supported on the lower part of the shaft 17. Worm wheel 1 on the outer circumference of the center shaft 17.
A turning motor 2 which is provided on the lifting platform 18 with which 9 is integrated.
0 through a worm gear 21 so that the hoist platform 18 can be swiveled around the central axis 17 according to the forward and reverse rotation drive of the motor 20.

Further, take-up drums 22 for hanging wire w are rotatably arranged at four corners of hoist platform 18, and take-up shafts 22a of each take-up drum 22 are connected to hoisting motor 23. Chain 24 and sprocket 2
Wires all at once in accordance with the forward / reverse rotation of the motor 23 via 5.
Rotate in the winding direction.

Further, an inclinometer 26 is arranged at an appropriate position on the side surface of the frame 2. This inclinometer is a hanging beam 1
Of the inclining direction and the inclining direction of the trolley 11 are detected by the detection output, the traveling motor 8 is normally or reversely rotated, and the balance weight 7 is moved according to the position of the trolley 11 with respect to the suspension beam 1 to constantly detect the value detected by the inclinometer 26. Is 0, that is, the suspension beam 1 is controlled to be horizontal.

Next, the hanging work in the above configuration will be described. First, when suspending the suspended load Tw, the trolley 11 moves to the center of the suspension beam 1, the arm 6 and the balance weight 7 also move to the center side correspondingly, and the position of the center of gravity in the state of being suspended by the hook 3 is set. Is located in the center of the suspension beam 1, and the suspension beam 1 is held horizontally.

A suspended load Tw is slid on the tip of each wire w, and a load is applied to the suspended beam 1 by winding the wire w. At this time, the suspended beam 1 is distributed due to the uneven distribution of the suspended load Tw.
Is tilted, the inclinometer 26 detects this, and the balance weight 7 moves according to this output to return the suspension beam 1 to the horizontal position.

The suspended load Tw is lifted up to a position near the receiving position of the suspended load Tw by the crane, and the suspended load Tw
When horizontally moving w to the receiving position, the hanging beam 1
With the trolley 11 facing in that direction and standing still
By moving the to the end portion side of the suspension beam 1, it is possible to receive in the moving direction.

The suspension beam 1 tends to incline toward the trolley side with the movement of the center of gravity at this time, but the balance weight 7 moves to the opposite side to keep the center of gravity constant at all times.

This adjustment range is shown in FIG.
The length from the center of suspension when the arm is pulled out from the end of the suspension beam 1 to the maximum, and the arm 6 + balance weight 7
The adjustment range is based on the product of the load and the moment.

Then, the hanging platform 18 is swung to match the longitudinal direction of the hanging load Tw with the receiving direction, or the winding motor 23 is driven to unwind the wire w from the winding drum 22, and the hanging load Tw is set at the receiving position. can do.

The operation of moving the trolley 11 and the loading platform 1
The turning operation of 8 and the feeding operation of the wire w can be directly performed by a worker at the site while visually confirming the state of each part by a remote operation device, etc., and can be finely adjusted, and the crane operator can be operated. The work load of can be reduced.

[0028]

As described above in detail with reference to the embodiments, in the crane hoisting device according to the present invention, the trolley should be centered and the balance weight should be positioned in the center of the hanging beam when hoisting. For example, the suspended load can be hung at the center of the crane hook, and the suspended load and the balance weight can be moved relative to each other at the transfer position to move the suspended load to the end side of the suspended beam while keeping it horizontal so that the suspended load can be pulled in. The weight of the balance weight is small, and the weight of the lifting device itself can be reduced. Further, the unloading and drawing-in work can be performed stably, and since only the horizontal length of the suspension beam is required at the time of unloading, it is advantageous for hanging in a narrow place.

[Brief description of drawings]

FIG. 1 is a side view of a lifting device according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 1 Suspended Load Beam 2 Frame 3 Crane Hook 6 Arm 7 Balance Weight 8 Traveling Motor 11 Trolley 14 Traveling Motor 18 Lifting Platform 20 Swiveling Motor 22 Winding Drum 23 Winding Motor w Wire Tw Hanging Load

Claims (4)

[Claims] 1. A suspension beam having a frame to be engaged with a hook block provided at the center, balance weights and trolleys arranged so as to be respectively movable along the longitudinal direction of the suspension beam, and provided at a lower portion of the trolley. And a hanging platform on which a hanging wire is suspended, and a traveling drive motor for the balance weight and the trolley. 2. The hoisting device for a crane according to claim 1, wherein the balance weight is fixed to an end of an arm that is movably inserted into the hoisting beam. 3. The crane hoisting apparatus according to claim 1, wherein the hoisting platform is supported on a lower portion of the trolley so as to be pivotable. 4. The hoisting device for the hoisting wire is arranged on the hoist platform.
The crane lifting device according to any one of 3 above.