JPH0769577A - Installation method of steel beam members by crane - Google Patents

Abstract

(57) [Abstract] [Purpose] When hoisting and transporting a steel beam member with a crane, the horizontal occupation area of the steel beam member is positively reduced to facilitate the transport work easily and safely. Accurately and quickly install steel beam members. [Structure] With the chain block 24 of the first suspension member 16 extended and the first and second suspension members 16 and 18 having substantially equal lengths, the steel beam member 14 is placed in a horizontal state and lifted. After hoisting the steel beam member 14 to a predetermined height, the motor 24a of the chain block 24 is driven to shrink the chain 24c and set the steel beam member 14 in a substantially vertical state. After the steel beam member 14 is conveyed vertically to the target position, the chain block 2
4 is driven again to extend the chain 24c to bring the steel beam member 14 into a substantially horizontal state, and the end portion of the steel beam member 14 is connected to the mating side for installation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for hoisting a steel beam member by a crane and transporting it to a predetermined position, and installing the transported steel beam member at a predetermined position.

[0002]

2. Description of the Related Art Conventionally, in a steel reinforced concrete building or the like, during construction, the steel aggregate stocked in a stockyard of materials is sequentially hung by a crane to be conveyed to construct a building framework. Has become. In this case, when transporting and installing the beam member,
Usually, both ends of this beam member are hoisted to a crane via ropes, and the beam member is transported in a horizontal state. In addition, as a method of hoisting the transported object in a horizontal state,
For example, there is one disclosed in JP-A-63-176291.

[0003]

However, in such a conventional method of installing a steel beam member by a crane, since the beam member is hoisted and conveyed in the horizontal direction, it is necessary to convey the beam member. There is a problem that the occupied area in the horizontal direction becomes extremely large, and in some cases, the beam member may enter the upper part of the area of the adjacent building and pose a danger.

Incidentally, when a flat plate-shaped PC plate is transported as a building material by a crane, a damper attached to two of the four sling ropes for suspending the PC plate is used.
A reversing device for controlling the attitude of the PC plate from a horizontal state to a vertical state is disclosed in Japanese Utility Model Laid-Open No. 4-24582, but this is merely an inevitable measure for the PC plate to be a wall panel. It differs from the aggressive technique of reducing the occupancy area in a direction.

In view of the conventional problems, the present invention positively reduces the horizontal occupation area of the steel beam member when the steel beam member is hoisted and transported by a crane, thereby carrying out the transportation work. An object of the present invention is to provide a method of installing a steel beam member by a crane, which can be simply and safely performed and can be installed accurately and quickly.

[0006]

In order to achieve the above object, a method of installing a steel frame beam member by a crane according to the present invention comprises a first suspension member having an extendable and retractable means and a first suspension member having a predetermined length. 2 hanging members are provided, and one end of each of the first and second hanging members is hung on a hook block of a crane, and the other length of the first hanging member is made substantially equal to that of the second hanging member. The steel beam member is locked at two locations separated by the center of gravity of the steel beam member, and the steel beam member is lifted up substantially horizontally, and then the expandable means is shortened to shorten the first hanging member, thereby removing the steel beam member. After being brought into a substantially vertical state and conveyed in this vertical state, the telescopic member is extended at the destination to extend the first suspension member to bring the steel beam member into a substantially horizontal state, and in this horizontal state, the steel beam member is predetermined. It will be installed in a position.

Further, in such an installation method, it is desirable to use a non-twisted wire rope for the first suspending member and the second suspending member.

[0008]

In the method of installing the steel beam member by the crane of the present invention having the above-described structure, first, when the steel beam member is suspended on the hook block of the crane, the steel beam member is lifted substantially horizontally. Since the extendable / contractible means is extended so as to be transported in a substantially vertical state, the horizontal area occupied by the steel beam member during this transportation can be significantly reduced. Therefore, the work of transporting the steel beam member can be carried out smoothly and safely. Then, when the steel beam member is installed at the destination, the expandable means is extended to make the steel beam member substantially horizontal. By operating the expandable means at the time of installation, the steel beam member is operated. The mounting position can be finely adjusted by subtly changing the amount of inclination of the member.

Further, by using the non-twisted wire rope for the first suspending member and the second suspending member, it is possible to prevent the wire from rotating due to the twisting of the wire when the steel beam member is hoisted, so that the carrying work is more accurate. And it can be done safely.

[0010]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 1 to 4 show an embodiment of a method for installing a steel beam member by a crane according to the present invention, FIG. 1 is a front view showing a suspended state and an installed state of the steel beam member, and FIG. 2 is a transportation of the steel beam member. FIG. 3 is a front view showing a state, and FIGS. 3 and 4 are explanatory views showing a twisted state of the wire. That is, as shown in FIGS. 1 and 2, the method of installing the steel beam member using the crane according to the present embodiment is as follows.
Of both ends, that is, the center of gravity of the steel beam member 10 (center)
First and second shackle 1 at two points A and B separated by
2, 14 are attached, and they are hung from a hook block 20 of a crane (not shown) through the first and second suspension members 16 and 18 hooked on these shackles 12 and 14.

The first suspension member 16 is constructed by providing a chain block 24 as an expandable member at the lower end portion of a first sling wire 22 constituting the upper end portion thereof, and the second suspension member 18 thereof is It is composed of a single second sling wire 26 having a predetermined length.
As the first and second sling wires 22, 26, an untwisted rope configured by bundling ropes from S shown in FIG. 3 and Z shown in FIG. 4 is used. It should be noted that S and Z shown in bold in FIGS. 3 and 4 indicate the twist direction of the rope.

The chain block 24 is a motor 24a.
It is configured as an electric type that is driven, and by remotely operating the motor 24a, the winding mechanism 24b is connected to the chain 2
4b is wound and unwound. The slinging portion 22a formed on the upper end portion of the slinging wire 22 is hooked on the hook block 20, and the hook 24d provided on the lower end portion of the chain 24b is hooked on the first shackle 12. ing. On the other hand, the second
The sling wire 26 is a sling portion 26 formed at the upper end.
a is hooked on the hook block 20, and a sling portion 26b formed at the lower end is attached to the second shackle 14
It is designed to hang on.

The steel beam member 10 is hoisted and conveyed by being hung from a crane while being stocked in a stockyard. When the steel beam member 10 is suspended in a crane, first, the crane hook is used. First and second in block 20
The sling members 22a and 26a of the hanging members 16 and 18 are hooked, and the chain block 24 of the first hanging member 16 is extended to keep the first and second hanging members 16 and 18 to have substantially equal lengths, and the lower ends thereof The hook 24d and the sling portion 26b provided on the portion of the shackle 12, 14 of the steel beam member 14.
Hang on. In this state, as shown in FIG. 1, the first and second suspension members 16 and 18 form two sides of an isosceles triangle, and the steel beam member 14 is in a horizontal state and is lifted.

After the steel beam member 14 is lifted to a predetermined height, the chain block 2 as shown in FIG.
The motor 24a of No. 4 is driven to shrink the chain 24c so that the first suspension member 16 can bear almost the entire load of the steel beam member 14. In this state, the steel beam member 14 is set in a substantially vertical state, and is lifted and transported in this vertical state. After the steel beam member 14 is conveyed vertically to the target position in this way, the chain block 24 is driven again to extend the chain 24c, and the first and second suspension members 16 are moved as shown in FIG. , 18 with substantially equal length, steel beam member 1
Put 4 in a substantially horizontal position. Then, in this horizontal state, the end of the steel beam member 14 is connected to the opposite side and installed.

Therefore, in the method of installing the steel beam member using the crane of this embodiment, the steel beam member 10 is lifted up substantially horizontally and then the chain 24c of the chain block 24 is moved.
Since the sheet is extended so that the sheet is conveyed in a substantially vertical state, the horizontal area occupied by the steel beam member 10 can be significantly reduced during the conveyance. Therefore, the steel beam member 10 can be lifted and transported in a small space, and this transportation work can be performed smoothly and safely.

When the steel beam member 10 is installed at the destination, the chain block 24 is driven to drive the chain 2
By changing the length of 4c, the amount of inclination of the steel beam member 14 can be subtly changed and the mounting position thereof can be finely adjusted. Therefore, the installation work of the steel beam member 10 can be performed more quickly and accurately, and labor saving for installation can be achieved.

By the way, the first suspension member 16 and the second suspension member 16
Since the non-twisted wire rope is used for the first wire 22 and the second wire 26 that form the hanging members 16 and 18,
It is possible to prevent twisting of the first and second wires 22 and 26 themselves, prevent rotation of the wires due to twisting of the steel beam member 10 when hoisting the steel beam member 10, and perform the carrying operation more accurately and safely.

Although the chain block 24 is used as the expandable / contractible means in this embodiment, the invention is not limited to this, and the first suspension member 1 can withstand the load of the steel beam member 10.
Any device capable of expanding and contracting 6 may be used.

[0019]

As described above, according to the first aspect of the present invention.
In the method of installing a steel beam member using a crane shown in FIG. 1, the center of gravity of the steel beam member is sandwiched by a first suspending member provided with a retractable means and a second suspending member formed to have a predetermined length. It is designed to hang two places separated from each other on the hook block of the crane. First, the first and second suspension members are made to have the same length, and the steel beam members are suspended substantially horizontally, and then the extendable means is extended. Since it is conveyed in a substantially vertical state, the area in the horizontal direction occupied by the steel beam member during this conveyance can be significantly reduced. Therefore, the work of transporting the steel beam member can be carried out smoothly and safely. Then, when the steel beam member is installed at the destination, the expandable means is extended to make the steel beam member substantially horizontal. By operating the expandable means at the time of installation, the steel beam member is operated. The mounting position can be finely adjusted by subtly changing the amount of inclination of the member.

Further, according to claim 2 of the present invention, since the non-twisted wire rope is used for the first suspending member and the second suspending member, when the steel beam member is lifted, the twisted wire is used. It has various excellent effects that the rotation can be prevented and the carrying operation can be performed more accurately and safely.

[Brief description of drawings]

FIG. 1 is a front view showing a suspended state and an installed state of a steel frame beam member according to the present invention.

FIG. 2 is a front view showing a transportation state of the steel beam member according to the present invention.

FIG. 3 is an explanatory diagram showing a rope formed by S of a wire used in one embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a rope formed by twisting a wire used in one embodiment of the present invention.

[Explanation of Codes] 10 Steel Beam Member 12 First Shackle 14 Second Shackle 16 First Hanging Member 18 Second Hanging Member 20 Hook Block 22 First Sliding Wire 24 Chain Block (Expandable Means) 26 Second Sliding Wire

Claims (2)

[Claims] 1. A first suspension member having an expandable / contractible means, and a second suspension member formed to have a predetermined length.
While suspending one end of the second suspending member on the hook block of the crane, the first suspending member is made to have substantially the same length as the second suspending member, and the other end thereof is separated by sandwiching the center of gravity of the steel beam member.
After locking the steel beam member in a substantially horizontal position and suspending the steel beam member substantially horizontally, the expandable means is contracted to shorten the first suspension member to bring the steel beam member into a substantially vertical state, and the steel beam member is conveyed in this vertical state. After that, at the destination of transportation, the expandable means is extended to extend the first suspension member to bring the steel beam member into a substantially horizontal state, and in this horizontal state, the steel beam member is installed at a predetermined position. Beam member installation method. 2. The method for installing a steel beam member by a crane according to claim 1, wherein a non-twisted wire rope is used for the first suspension member and the second suspension member.