JP2000351576A - Tower crane and removal method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tower crane and the removal method thereof which can turn the dismantled parts of the tower crane such as a wall connection material safely, under such condition that the turning of a crane body is not carried out and remove efficiently. SOLUTION: A tower crane is provided with a crane body 10 elevatable along a mast 30 and having a load hanging device 20 turnable around the mast 30. The load hanging device 20 is constituted by a rail 21 fixed on the lower part of the crane body so as to surrounnd the mast 30, a trolly 22 for turning around the mast 30 along this rail 21 and a chain block 23, provided with this trolly 22, for hanging the dismantled parts of the tower crane such as a wall connection material 40, stay frame 41 and reinforcement material 42. The dismantled parts are removed by the crane body after hanging the dismantled parts of the tower crane to a load hanging device 20, turning around the mast 30 and hang-changing to the crane body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tower crane and a tower crane removing method capable of easily removing its own disassembled parts.

[0002]

2. Description of the Related Art When building a building structure, a tower crane is used as a means for lifting materials. When a tower crane is used outside the building structure, first, a mast is erected at a predetermined position outside the building structure, and the wall of the skeleton and the mast are firmly connected by a wall connecting material. Then, the crane body which can be turned and raised and lowered is provided on the upper part of the mast, and the mast is sequentially increased upward as the frame work progresses, and the crane body is raised along the mast by the lifting device provided on the crane body. After the construction of the top floor is completed, the disused tower crane is dismantled and removed, but dismantled parts of the tower crane such as wall ties are suspended and removed by the crane itself.

[0003]

However, when the tower crane is approaching the skeleton, the crane main body cannot rotate because the crane main body contacts the skeleton. Therefore, when the dismantled parts are removed, the dismantled parts can only be suspended by the crane body itself in the up-and-down direction of the boom of the crane body. Therefore,
When removing dismantled parts that are not in the up-and-down direction of the boom, the dismantled parts are removed using a mobile crane for tower crane dismantling, but using a mobile crane is inefficient in removing work. In order to be able to suspend the dismantled parts by the crane itself, for example, the dismantled parts are turned to the boom undulation direction with a chain block taken from a mast, and then the dismantled parts are suspended on the crane body, The dismantled parts are removed by the main unit itself, but it is dangerous to work at heights.

[0004] The present invention has been made in view of the above circumstances, and under the conditions where the crane body cannot be turned,
An object of the present invention is to provide a tower crane and a tower crane removal method that can safely turn and efficiently remove dismantled parts of the tower crane such as wall connecting members.

[0005]

Means for Solving the Problems To solve the above problems, the invention according to claim 1 is a tower crane (1) having a crane body (10) that can move up and down along a mast (30). The crane body is characterized in that a load suspending device (20) that can turn around a mast is provided on the crane body.

As described above, according to the first aspect of the present invention, for example, when the crane main body cannot turn, the load such as the wall connecting material in the direction in which the crane main body cannot be hung is loaded. The load is suspended by a suspending device, and the load suspending device pivots around the mast together with the load, whereby the load is easily pivoted to a direction in which the crane main body can be suspended (boom undulation direction). The load can be suspended by the crane body.

According to a second aspect of the present invention, the load hoisting device includes a track (for example, a rail 21) fixed to a lower portion of the crane body so as to surround the mast, and a periphery of the mast along the track. A traveling traveling device (for example, trolley 2)
2) a suspending device (for example, a chain block 23) for suspending a load (for example, a disassembled part of a tower crane such as a wall connecting member 40, a stay frame 41, and a reinforcing member 42) provided in the traveling device; It is characterized by comprising.

The track guides the traveling device around the mast. Thus, according to the invention of claim 2, the traveling device can swing around the mast along the track fixed to surround the mast at the lower part of the crane, suspending the load by the hanger, As in the first aspect of the present invention, the load can be easily turned to a direction in which the crane body can be suspended (boom undulation direction), and the load can be suspended by the crane body.

According to a third aspect of the present invention, there is provided a load hoisting apparatus using a tower crane provided with the load hoisting apparatus according to the first aspect, by rotating the load hoisting device around the mast with respect to the crane body. And a step of suspending at least a dismantled part (for example, a wall connecting member 40, a stay frame 41, a reinforcing member 42) installed between the tower crane and the building body (100) of the building structure. The method is characterized by a method of removing a tower crane, comprising: a step of rotating a suspended load suspending device around a mast; and a step of subsequently suspending a dismantled component suspended on the load suspending device by the crane body.

Thus, according to the third aspect of the invention, the dismantling part of the tower crane is hung by the load hoisting device, and the crane body can be hung around the mast (boom up / down direction). The dismantled part is swung until the dismantled part is suspended by the crane body. Therefore, even when the crane main body cannot be turned, it can be removed by the crane main body.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a tower crane to which the present invention is applied. 10 is a crane main body, 11 is a lifting device, 12 is a boom, 13 is a hook, 2
0 is a load suspending device, 30 is a mast, 40 is a wall connecting material, 1
00 is the frame of the building structure.

As shown in FIG. 1, a crane body 10 provided with an elevating device 11 at a lower part is installed on an upper part of a mast 30, that is, the crane body 10 is moved as the construction work of the building structure progresses. The mast 30 is sequentially increased upward, and the crane main body 10 is raised along the mast 30 by the elevating device 11, and is installed above the mast 30.
After the completion of the construction of the building structure, the crane body 10
Can be lowered along the mast 30 by the lifting device 11.

The boom 12 is provided on the crane body 10, and the boom 12 can be raised and lowered by a lifting device (not shown). The lifting of the load is performed by a hoist (not shown) using a hook 13 lowered from the tip of the boom 12 via a rope 14.

The crane main body 10 has a turning device (not shown), and can turn above the mast 30. As described above, the tower crane 1 can be swung and undulated according to the construction situation, and can suspend loads such as materials for building structures and dismantled parts of the tower crane.

FIG. 2 is an enlarged view of a lower portion of the crane main body 10 and is a side view as viewed from a lateral direction. The wall connecting member 40 is a member connecting the mast 30 and the skeleton 100 of the building structure. The stay frame 41 is fixed to the mast 30 so as to surround the mast 30, and is a member that supports the wall connecting material 40 to the mast 30. Reinforcement material 42 is mast 3
0, and is a member for fixing the stay frame 41 and the mast 30 more firmly. As shown in the figure,
The wall connecting member 40 is supported on the mast 30 by a stay frame 41, and the stay frame 41 and the mast 30 are connected to a reinforcing member 42.
Is firmly fixed by And wall connecting material 4
Numeral 0 is fixed to the wall of the frame 100 of the building structure. Thus, the wall connecting member 40, the stay frame 41, and the reinforcing member 42
As a result, the mast 30 is firmly fixed to the skeleton 100 of the building structure.

When the tower crane is dismantled, the load suspending device 20 includes the detached wall connecting member 40 and the stay frame 41.
And a device capable of suspending the reinforcing member 42. As shown in an enlarged manner in FIG.
4 attached to the lower part. Then, the mounting bolts 25, 25,
25 and 25, the mounting base 24 and the mounting iron pole 2
6 is fixed. Thus, the load suspending device 20 is attached to the lifting device 11 provided in the crane body 10.

The load suspending device 20 includes a rail 21 and a trolley 2.
2. It is composed of a chain block 23. The rail 21 serving as a track guides the trolley 22 along the periphery of the mast 30. The rail 21 is a rail having an I-shaped cross section, and is attached to a lower portion of the elevating device 11 as shown in FIG. As shown in FIG. 4, the rail 21 has a circular shape and is attached so as to surround the mast 30.

The trolley 22, which is a traveling device, is provided with wheels 221 in front, rear, left and right so as to be movable. The left and right wheels are inserted into the grooves of the rail 21 so as to sandwich the rail 21. In this way, the trolley 22 is connected to the rail 21
Along the periphery of the mast 30.

The chain block 23, which is a suspending device, is a device for suspending a load.
31 and a hook 232 are provided so that the load can be hung. The chain block 23 is attached to the trolley 22, and is able to turn around the mast along the rail 21 together with the trolley 22.

Thus, the load suspending device 20 can suspend the load by the chain block 23, and can turn around the mast 30 by the rail 21 and the trolley 22.

After completion of the skeleton work on the top floor of the building structure,
For example, when the tower crane 1 is approaching the building body 100 of the building structure, the crane body 10 cannot turn because the crane body 10 contacts the building body 100 of the building structure. In such a case, a disassembling procedure of the tower crane 1 configured as described above will be described.

The worker at the landing 31 removes the wall connecting member 40 which fixed the mast 30 to the frame 100 of the building structure. Then, the worker turns the chain block 23 with the trolley 22 so that the detached wall connecting member 40 is hung on the chain block 23. And
The operator locks the detached wall connecting member 40 to the hook 232 of the chain block 23, or directly ties the wall connecting member 40 with the chain 231 and hangs it on the chain block 23. Then, the worker turns the trolley 22 along the rail 21 around the mast 30 together with the wall connecting material 40 suspended from the chain block 23. Thus, the operator can easily turn the wall connecting member 40 to the direction in which the crane main body 10 can be suspended (the boom 12 is raised and lowered). Then, the wall connecting member 40 turned to a direction in which the crane main body 10 can be suspended,
Hang it on the hook 13 of the crane body 10. And
The boom 12 is laid down, the ropes 14 are extended, and the wall tether 40 is suspended from the ground and removed.

Similarly, the stay frame 41 and the reinforcing member 42 are also suspended from the chain block 23, and are rotated around the mast 30 by the trolley 22, so that the crane body 10 can be suspended (the boom 12 is raised and lowered). And lift it off the crane body 10 and remove it.

As described above, at the lower part of the crane main body 10, the chain block 23 can be turned around the mast 30 along the rail 21 by the trolley 22, and is located at the lower part of the crane main body 10 so that the crane main body 10 can be suspended. Wall connecting material 40, stay frame 41 in the direction in which
And the disassembled parts such as the reinforcing material 42
By rotating the trolley 22 around the mast 30 together with the chain block 23 and these dismantled parts, the dismantled parts are swung to a direction in which the crane body 10 can be suspended (the up-and-down direction of the boom 12). And the crane body 1
It is possible to suspend these disassembled parts by the crane main body 10 and to remove them by the crane main body 10.

In the above-described embodiment, the hanging member is the chain block 23, but any device can be used as long as it can hang a load. The track is a circular rail with an I-shaped cross section, but any shape may be used as long as it guides the trolley along the periphery of the mast. The disassembled parts such as the wall connecting member 40 are suspended by the hooks 232 or the chains 231 of the chain block 23. For example, the disassembled parts are mounted on a plate material, and the other parts are suspended by the hooks 232 or the chains 231. May be hung via the member. This is the same also when hanging on the hook 13 of the crane main body 10. In addition, how to remove the wall timber,
Of course, details such as the method of turning the load suspending device, the tower crane, the crane body, the trolley, and the mast wall connecting material can be appropriately changed.

[0026]

According to the first aspect of the present invention, for example, when the crane main body cannot turn, a load in a direction in which the crane main body cannot be hung is suspended by the load suspending device, and By rotating the load suspending device around the mast together with the load, the load can be easily turned to a direction in which the crane body can be suspended (boom up / down direction). Therefore, the safety of the removal work at a high place is improved. In addition, the crane itself can suspend the load, for example,
There is no need to remove dismantled parts using a mobile crane for tower crane dismantling, and the efficiency of tower crane removal work is improved.

According to the second aspect of the present invention, the traveling device can swing around the mast along a track fixed to the lower part of the crane so as to surround the mast. As in the invention described in Item 1, the load can be easily turned to a direction in which the crane body can be suspended (boom up / down direction). Therefore,
The safety of removal work at high altitude is improved. In addition, the crane body itself can suspend the load, and for example, there is no need to remove the dismantled parts using a mobile crane for dismantling the tower crane, and the removal work efficiency of the tower crane is improved.

According to the third aspect of the present invention, the dismantling part of the tower crane is suspended by the load suspending device, and
The dismantled part is swung to a direction in which the crane body can be hung (boom undulation direction), and the dismantled part is hung by the crane body. Therefore, even when the crane body cannot be turned, it can be removed by the crane body. For example, there is no need to remove dismantled parts using a mobile crane for dismantling the tower crane. Work efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a tower crane as an example to which the present invention is applied.

FIG. 2 is an enlarged side view showing a crane main body lower part of FIG. 1;

FIG. 3 is an enlarged view showing a specific example of the load suspending device of FIG.

4 is a diagram showing a specific example of the load suspending device of FIG. 3 from above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tower crane 10 Crane main body 11 Lifting device 12 Boom 20 Loading device 21 Rail (track) 22 Trolley (traveling device) 23 Chain block (hanging tool) 30 Mast 40 Wall connecting material (load) 41 Stay frame (load) 42 Reinforcement Lumber (load)

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Keiichi Senba 2- 10-26 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. (72) Inventor Hideaki Otsuka 2- 10-26 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. F-term (reference) 3F205 AA03 AB05 BA01 CA01 DA01 JA10

Claims (3)

[Claims] 1. A tower crane having a crane body that can move up and down along a mast, wherein the crane body is provided with a load suspending device capable of turning around the mast. 2. A load suspending device comprising: a track fixed to a lower part of a crane body so as to surround a mast; a traveling device for turning around the mast along the track; and a traveling device provided with the traveling device. The tower crane according to claim 1, wherein the tower crane is configured by a suspender for suspending. 3. A tower crane equipped with the load suspending device according to claim 1, wherein the load suspending device is turned around the mast with respect to the crane main body, so that the load suspending device includes at least the tower crane and the building structure. A step of suspending the disassembled part to be installed between the body of the object, and a step of rotating the load suspending device suspending the disassembled part around the mast, and then suspending the dismantled part on the mast. A step of suspending dismantled parts to the crane body; and removing the tower crane.