JPH07101670A - Hanging and raising-up method for heavyweight long size material - Google Patents

Abstract

PURPOSE:To carry out hanging and raising-up work while reducing the number of cranes to be used in a device to hang and raise up a heavyweight long size material in a condition where bending stress is not exerted on fixing steel material. CONSTITUTION:Respective both ends of a first slinging work wire 10 where a hook 14 of a first crane is passed through a connectable pulley 13, are connected so as to be connectable to/releasable from respective first hanging members 8 integrally installed on respective both end sides in the lengthwise direction of a heavyweight bar shape body 6 having a length not less than 10m. After a second slinging work wire 12 is connected to the tip side of H shape steel 7 protrusively arranged on one end side in the lengthwise direction of the heavyweight bar shape body 6, the hook 14 of the first crane is connected to the pulley 13. A hook 15 of a second crane is connected to the second slinging work wire 12, and after the heavyweight bar shape body 6 is hung up in a recumbently falling-down posture by the first crane, the tip side of the H shape steel 7 is pulled up by the second crane, and the heavyweight bar shape body 6 is hung and raised up in a vertical posture.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for lifting a long and heavy object such as a PC structure column used for a continuous wall support pile from a sideways lying position on the ground to a vertical position. The present invention also relates to a method for hoisting a heavy long object in which a fixing steel material is projected on at least one end side in the longitudinal direction of a weight rod having a length of 10 m or more.

[0002]

2. Description of the Related Art In the case of lifting a heavy long object as described above, for example, when a crane is used to hang one end in the longitudinal direction of the weight rod and the tip of the fixing steel material, Due to the heavy weight of the body, the fixing steel material bends. For this reason, in general, each side of the weight rod in the longitudinal direction is hung by individual cranes, and while the weight of the weight rod is supported by two cranes, another crane lifts the fixing steel material, and two cranes are used. Adjust the winding length of the wire to change the weight rod from a sideways posture to a posture close to a vertical posture so that bending stress is not applied when it is lifted on the fixing steel material, and then another crane is used. The fixing steel material was lifted by and suspended in a vertical position.

[0003]

However, in the conventional hoisting and raising method, two cranes are used to support the weight of the weight rod and one crane is used to suspend the fixing steel material. It was necessary, a total of three cranes and an operator were required, which was expensive in terms of equipment and personnel, and had the disadvantage of low economic efficiency.

The present invention has been made in view of the above circumstances, and is capable of hoisting a long and heavy object in a state in which bending stress is not applied to the fixing steel material, but the number of cranes used is small. The purpose is to be able to lift and raise the work.

[0005]

In order to achieve the above-mentioned object, the present invention has a weight length in which a fixing steel material is projected on at least one end side in the longitudinal direction of a weight rod having a length of 10 m or more. In the method for hoisting a scale, a hanging member in which both ends of a first sling wire, which is passed through a pulley to which a hook of a first crane can be connected, are integrally attached to both longitudinal ends of a weight rod. Releasably connect to each of them, and attach a second
After connecting the sling wire of, the hook of the first crane is connected to the pulley, the hook of the second crane is connected to the second sling wire, and the weight rod is tilted sideways by the first crane. It is characterized in that, after being lifted, the tip end side of the fixing steel material is lifted by the second crane to lift the weight rod-shaped body in a vertical posture.

[0006]

According to the construction of the method for hoisting and raising a heavy long object of the present invention, while the weight of the heavy rod-shaped body is supported by the first crane through the pulley and the first sling wire, While lifting the tip of the fixing steel with a crane and applying sufficient force to change the posture, change the weight bar from the sideways posture to the vertical posture. Can be lifted with a crane and hung in a vertical position.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is an overall schematic plan view showing an arrangement of guide trenches at a site for carrying out a method of hoisting a heavy long object according to the present invention. A continuous wall support pile for supporting a frame is provided in a site 1. A guide trench 2 for constructing is constructed.

The preceding unit 3 and the succeeding unit 4 are alternately constructed along the guide trench 2, and the PC structure true column 5 is provided at the central portion in the succeeding unit 4. PC
The true column 5 is constructed by projecting H-shaped steel 7 as a fixing steel material on both ends in the longitudinal direction of a weight rod 6 having a length of about 17 m.

Next, a method of hoisting the PC structure column 5 as the above-described long and heavy object will be described with reference to the drawings.

First, as shown in the side view of FIG. 2, a first suspending member 8 is integrally attached to each of both longitudinal ends of the weight rod 6 at positions equidistant from the end. Second on the tip side of one flange of H-section steel 7,7
The hanging member 9 is integrally attached. Each of these first and second suspension members 8, 8, 9, 9 may be attached in advance when the PC structural column 5 is manufactured.

Then, as shown in the side view of FIG.
First sling wire 10 on each of the hanging members 8 and 8
The both ends of are connected via shackles 11, and the second sling wires 12 are connected to the second suspension members 9, 9.

The first sling wire 10 is passed through a pulley 13, a hook 14 of a first crane (not shown) is connected to the pulley 13, and the second sling wire 12 is connected to a second crane (not shown). The hook 15 (not shown) is connected.

The shackle 11 is fitted with the first suspending member 8 as shown in the longitudinal sectional view of the main part of FIG. 4A and the plan view of the main part of FIG. 4B. A connecting portion 17 for connecting the first sling wire 10 is provided on the side opposite to the opening of the U-shaped shackle body 16, and a connecting pin 18 is slidably provided on the opening side and the connection is made. A lock pin 19 for fixing the pin 18 in the connecting position is provided, and the operation wires 20 and 21 are connected to the connection pin 18 and the lock pin 19, respectively, so that the operation for releasing the connection to the first hanging member 8 can be performed far. It is configured so that it can be performed even from.

More specifically, the head portion 18a of the connecting pin 18 is slidably fitted in the cylindrical body 22, the locking bolt 23 is attached to the head portion 18a, and the locking bolt 23 moves. A guide groove 24 is formed in the tubular body 22 to guide the rotation of the connecting pin 18 so that the connecting pin 18 can only slide in the direction in which the first hanging member 8 is disengaged. A fitting recess 25 is provided at the end of the guide groove 24 on the shackle body 16 side, and the locking bolt 23 is forcibly fitted into the fitting recess 25 with the connecting pin 18 in the connecting position. It is configured so that 18 can be maintained in the connected position. When the connection is released, the connection pin 18 is operated against the fitting force.

The lock pin 1 is provided on the side opposite to the cylindrical body 22.
A casing 26 into which the 9 is slidably fitted is provided, and the compression coil spring 2 for urging the lock pin 19 so as to displace the lock pin 19 in the casing 26 is provided.
7 is provided so that the fixation can be released against the biasing force of the compression coil spring 27.

With the above structure, while the shackle 11 is forcibly connected to the first suspension members 8 and 8 in the initial stage,
By operating the first and second operation wires 20 and 21, the connection release operation can be performed from a distant place.

As shown in the front view of FIG. 5A and the side view of FIG. 5B, the pulley 13 is rotatably provided between the pair of brackets 28, 28.
Also, the opposing distance between the two brackets 28, 28 is set to be smaller than the thickness of the shackle body 16, and the first sling wire is removed even when the shackle 11, 11 is removed from the first hanging member 8, 8. 10 is configured so as not to come off. In the figure, 29 indicates a restriction pin that prevents the hook 14 of the first crane and the first sling wire 10 from coming into contact with each other, and 30 indicates a winding prevention pin that prevents the first sling wire 10 from winding. Is shown.

After connecting the hooks 14 and 15 of the first and second cranes described above, as shown in the side view of FIG. 6, the PC crane column 5 is lifted by the first crane, and A pulling force is applied to the H-section steel 7 by the second crane to change the sideways posture to a posture close to the vertical posture, and thereafter, as shown in the side view of FIG. 7, the first crane is used. The hoisting force is weakened, and the PC structure column 5 is hung vertically by the second crane.

Then, as shown in the side view of FIG.
Then, the shackle 1 is operated by operating the second operation wires 20 and 21 (omitted in this figure; see FIG. 4).
1 and 11 and the first suspension members 8 and 8 are released from the connection, the first sling wire 10 is removed from the weight rod-shaped body 6, and
A series of hoisting of the true column 5 is completed.

The present invention is not limited to the hoisting and raising of the PC structure post 5 as described above, and for example, a bridge pier of the same type, that is, at least one end side in the longitudinal direction of a weight rod-shaped body having a length of 10 m or more. It can be applied when suspending heavy long objects with fixing steel materials protruding.

[0022]

As described above, according to the hoisting and raising method for heavy and long objects of the present invention, by the first crane,
Since the weight of the weight rod is supported via the pulley and the first sling wire, when the weight rod is hoisted in a sideways posture, it is not necessary to apply a hoisting force to the fixing steel material, and With respect to the fixing steel material, it suffices to pull up the tip side of the fixing steel material with a second crane and give a sufficient force to change the posture, and the vertical posture without applying bending stress to the fixing steel material. You can hang it up. Moreover, it is only necessary to use two cranes, the first and second cranes, and the number of cranes to be used and the number of operators can be reduced compared to the conventional three cranes used. Even though a long and heavy object is hoisted without applying bending stress to the steel material, the hoisting work can be carried out by reducing the number of cranes to be used, and the economical efficiency can be improved.

[Brief description of drawings]

FIG. 1 is an overall schematic plan view showing an arrangement of guide trenches at a site where a method of hoisting a heavy long object according to the present invention is carried out.

FIG. 2 is a side view.

FIG. 3 is a side view.

FIG. 4A is a vertical cross-sectional view of a main part showing a shackle,
(B) is a plan view of a main part.

5A is a front view of the pulley, and FIG. 5B is a side view of the pulley.

FIG. 6 is a side view.

FIG. 7 is a side view.

FIG. 8 is a side view.

[Explanation of symbols]

 5 ... PC structure true pillar as a heavy long object 6 ... Heavy rod-shaped body 7 ... H-shaped steel as fixing steel material 8 ... First hanging member 10 ... First sling wire 12 ... Second sling wire 13 ... Pulley 14 ... Hook of first crane 15 ... Hook of second crane

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location E04G 21/14 (72) Inventor Toshio Harada 4-1-1 Hommachi, Chuo-ku, Osaka Stock companies Takenaka Corporation Osaka Main Store (72) Inventor Hiroshi Hara 4-1-1 Hommachi, Chuo-ku, Osaka City Stock Company Takenaka Corporation Osaka Main Store

Claims (1)

[Claims] 1. A method for hoisting a heavy long object in which a fixing steel material is projected on at least one end side in the longitudinal direction of a weight rod having a length of 10 m or more, and a hook of a first crane can be connected. No. 1 passing through a pulley
Each end of the sling wire is releasably connected to each of the suspension members integrally attached to both ends of the weight rod in the longitudinal direction, and a second sling wire is attached to the tip end of the fixing steel material. After connecting the hook of the first crane to the pulley, the hook of the second crane is connected to the second sling wire, and the weight rod is laid down sideways by the first crane. A method for hoisting a heavy long object, comprising hoisting in a posture and then hoisting the weight rod in a vertical posture by pulling up a tip end side of the fixing steel material by the second crane.