JPH08301570A - Heavy load reversing-centering device - Google Patents

Abstract

PURPOSE: To provide a reversing-centering device that can perform the centering work of a heavy load while preventing the fall of the heavy load and the damage of a building or the like based on the oscillation of the heavy load. CONSTITUTION: A balance frame 1 is hung by a crane, and chain blocks 3a, 3b, 3c are provided. Chains 7a, 7c are wound around a heavy load 5, and the tip parts are engaged with the heavy load 5. A remaining center side chain 7b is wound in the opposite direction around the heavy load 5, and the tip part of the chain 7b is engaged with the heavy load 5. While keeping longitudinal and rotating direction weight balance by the chains 7a, 7c on both end sides, the center side chain 7b is wound down, whereas the chains 7a, 7c on both end sides are wound up so as to reverse the heavy load 5 stably. The chains 7a, 7c on both end sides are wound up and down in the mutually opposite directions to change longitudinal inclination for centering.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heavy weight reversing / centering device for reversing and centering a heavy object by suspending it with a crane.

[0002]

2. Description of the Related Art Heavy objects, such as large molds, bridge girders, boilers, pipe headers, etc., should be laid sideways or turned upside down for welding, assembly, installation, etc.
It is necessary to perform centering as necessary. As this heavy-weight reversing device, there is a conventional example shown in FIGS. 7 and 8. 10
1 is a balance crane suspended by a crane (not shown), 102a and 102b are two reversing machine bodies 102a and 102b mounted in the longitudinal direction of the balance crane 101 via mounting brackets, and 105 is the reversing mechanism body 102a, A motor attached to the motor 102b, 106 and 107 are reduction gears driven by the motor 105, 108 is a sprocket driven by the reduction gear 107, and 104a and 104b are sprockets 10 of the reversing mechanism bodies 102a and 102b.
Two chains 103a and 103b meshing with 7 are two wires for holding a heavy object.
The upper ends of both sides of 03b are the chains 104a and 104b.
Are engaged with hooks attached to the lower ends of both sides.

In the heavy weight reversing device, the sprocket 10 is driven by driving the motor 105 of the reversing mechanism bodies 102a and 102b through the reduction gears 106 and 107.
7. Chains 104a, 104b and wire 103
A and 103b are driven in the arrow direction of FIG. 8 to rotate and reverse the heavy load in the arrow direction.

[0004]

In the conventional heavy object reversing device shown in FIGS. 7 and 8, when the heavy object is an unbalanced load, the center of gravity of the heavy object moves at the time of reversal, and the heavy object accordingly. Shakes greatly and collides with the pillars of the building and machine tools near the reversal site, damaging them. Further, in some cases, there is a risk that the heavy object will be greatly out of balance, the wires 103a and 103b enclosing the heavy object will come off the heavy object, and the heavy object will fall.

Further, since the heavy object is merely wrapped by the wires 103a and 103b, there is a problem that the centering operation cannot be performed by changing the inclination angle of the heavy object in the longitudinal direction. The present invention is proposed in view of the above problems, and an object thereof is to prevent damage to a building or the like due to rocking of a heavy object, prevent a heavy object from falling, and center a heavy object. The point is to provide a reversing / centering device for heavy objects that can perform work.

[0006]

In order to achieve the above object, a heavy object reversing / centering device according to the present invention comprises a balance frame suspended by a crane and a mounting metal fitting in the longitudinal direction of the balance frame. A lifting mechanism having three or more chain blocks attached via the above (claim 1).

In the device for inverting and centering heavy objects,
A winch, hoist or the like may be used instead of the chain block (claim 2).

[0008]

The heavy-weight reversing / centering device of the present invention is constructed as described above, and the balance frame is hung by a crane, and three or more units are mounted in the longitudinal direction of the balance frame via the mounting brackets. Of the chain blocks, the chains of the chain blocks on both ends are wound around a heavy object, for example, left-handed, and the tip (hook) of each chain is engaged with the heavy object (hanging piece), and the remaining center chain Wrap the block chain around a heavy object in a right-handed direction in the opposite direction to the above chains, engage the tip (hook) of the chain with the heavy object (hanging piece), and then (a) check both ends. The chain of the chain block keeps the weight balance of the heavy object in the longitudinal direction, and (b) the chain of all chain blocks keeps the weight balance of the heavy object in the rotation direction. While lowering winding a chain of Enburokku, by winding up a chain of both ends of the chain block, stably reverse the heavy,
(d) Centering is performed by changing the tilt angle of the heavy object in the longitudinal direction by winding up and down the chains of the chain blocks on both ends in opposite directions (for example, winding up the left side and winding down the right side). .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the heavy weight reversing / centering device of the present invention will be explained with reference to one embodiment shown in FIGS. 1 to 5. Reference numeral 1 is a linear I-beam balance frame, which is the center of the balance frame 1. Engaging pieces 2a, 2b, 2b are fixed to the upper surface of the part and the upper surfaces of both ends by welding. 10 is the crane hook,
9a and 9b are the hook 10 and the engaging pieces 2a, 2b and 2
The balance frame 1 is suspended by a crane with a wire engaged with b.

3 is a chain block fixed to the lower surface of the balance frame 1, 3a, 3b and 3c are chain blocks suspended from the respective mounting brackets 4, 7a, 7b and 7c are chain blocks 3a, 3b, 3c chain, 8
Reference numerals a, 8b, and 8c are hooks attached to the tips of the chains 7a, 7b, and 7c. Reference numeral 5 is a heavy object, and 6 is a hanging piece attached to the same object 5 corresponding to the hooks 8.

Next, inversion of the heavy object shown in FIGS.
The operation of the centering device will be specifically described. The balance frame 1 is hung by the hook 10 of the crane and the wires 9a and 9b, and the three chain blocks 3a and 3b are mounted in the longitudinal direction of the balance frame 1 through the respective mounting brackets 4.
Of the chain 3c, the chains 7a, 7c of the chain blocks 3a, 3c on both end sides are wound around the heavy object 5 in a left-handed manner, for example, and hooks 8a, 8 at the tips of the respective chains 7a, 7c are wound.
c is engaged with the hanging pieces 6, 6 of the heavy load 5 (see FIG. 2), and the chain 7b of the remaining chain block 3b on the center side is wound on the heavy load 5 in the opposite direction to the above-mentioned chains 7a, 7c. And hooking the hook 8b at the tip of each chain 7b with the hanging piece 6 of the heavy object 5 (see FIG. 3), (a) the chain blocks 3a, 3c on both ends of the chain 7
By a and 7c, the weight balance of the heavy load 5 in the longitudinal direction is maintained.

(B) All chain blocks 3a, 3b,
The weight balance of the heavy load 5 in the rotation direction is maintained by the chains 7a, 7b, 7c of 3c. (c) Reversing, overturning, and centering of the heavy load 5 are performed as follows. FIG. 4 shows a state in which the heavy load 5 is turned over and laid on its side.
At this time, operate the crane to move the hook 10 and the wire 9
a, 9b, balance frame 1, chain block 3a, 3
The heavy object 5 is lifted via b, 3c and the chains 7a, 7b, 7c, and then the chain block 3b is actuated in the unwinding direction to wind the chain 7b around the heavy object 5, and at the same time, the chain block 3a, 3c is operated in the direction in which the chain block 3b is wound in the same amount as the amount of hoisting, and the chains 7a and 7c are unwound around the heavy object 5 and the heavy object 5 is freely rotated in the air in the suspended state. (Rotate counterclockwise in FIG. 4) to invert or overturn the heavy object 5.

At this time, the heavy load 5 is the chain 7a, 7
Since it is supported by b and 7c, it can be safely inverted or laid on its side. FIG. 5 shows a state in which the heavy load 5 is centered. At this time, the chain blocks 3a and 3c are in mutually opposite directions (in FIG. 5, the chain block 3a is wound up and the chain block 3c is wound down).
To change the tilt angle of the heavy load 5 in the longitudinal direction to perform centering.

In the above embodiment, the chain block is used as the lifting mechanism, but a winch or hoist may be used instead of the chain block. Although three lifting mechanisms are used, the same effect can be achieved with four lifting mechanisms.

[0015]

As described above, the device for reversing and centering a heavy object according to the present invention has three or more chain blocks, in which the balance frame is hung by the crane and is attached in the longitudinal direction of the balance frame through the fittings. Of these, the chains of the chain blocks on both ends are wound around a heavy object, for example, left-handed, and the tip (hook) of each chain is engaged with the heavy object (hanging piece), and the chain of the remaining chain block on the center side Wrap around a heavy object in the right-hand direction in the opposite direction to the above chains, engage the end of the chain (hook) with the heavy object (hanging piece), and then (a) attach the chain blocks on both ends. The chain keeps the weight of the heavy object in the longitudinal direction, and (b) the chain of all chain blocks keeps the weight of the heavy object in the rotating direction.
(c) The chain of the chain block on the center side is unwound, while the chain of the chain block on both ends is wound up, so that the heavy object is stably inverted, and (d) the chains of the chain blocks on both ends are in opposite directions. By winding up and down (for example, winding up on the left side and winding down on the right side), the tilt angle in the longitudinal direction of the heavy object is changed to perform centering, so damage to the building etc. due to rocking of the heavy object can be prevented. It is possible to prevent heavy objects from falling, and to perform centering work of heavy objects.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a heavy weight reversing / centering device according to the present invention.

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

3 is a vertical cross-sectional front view taken along the line BB of FIG.

FIG. 4 is an explanatory view of an operation when reversing the weight reversing / centering device.

FIG. 5 is an explanatory view of an operation of the reversing / centering device of the same weight at the time of centering.

FIG. 6A is an explanatory view of the operation at the time of reversal in another embodiment using four lifting mechanisms, and FIG. 6B is an explanatory view of the operation at the time of centering in the same embodiment.

FIG. 7 is a front view showing a conventional reversing device.

FIG. 8 is a side view showing a conventional reversing device.

[Explanation of symbols]

 1 Balance frame 2a, 2b, 2b Engagement piece 3a, 3b, 3c Chain block 4 Mounting bracket 5 Heavy object 6 Lifting piece 7a, 7b, 7c Chain 8a, 8b, 8c Hook 9a, 9b Wire 10 Crane hook

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takanobu Masuda 1-1-1, Wadasaki-cho, Hyogo-ku, Kobe-shi, Hyogo Mitsubishi Heavy Industries Ltd. Kobe Shipyard

Claims (2)

[Claims] 1. A lifting mechanism comprising: a balance frame suspended by a crane; and three or more chain blocks mounted in the longitudinal direction of the balance frame via mounting brackets. Inversion and centering device for heavy objects. 2. The heavy weight reversing / centering device according to claim 1, wherein a winch, a hoist or the like is used instead of the chain block.