JP4367900B2 - Temporary fixing method and apparatus for reinforcing reinforcement for steel pipe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method for temporarily fixing a steel pipe reinforcing steel bar and a device for attaching the steel pipe reinforcing steel bar in close contact with a steel pipe (spiral steel pipe) during on-site construction of the steel pipe pile.
[0002]
[Prior art]
Steel pipe piles are generally used to support the foundations of building structures, but a steel pipe pile with a function of preventing slippage is fitted by fitting a ring-shaped reinforcing bar to the inner peripheral surface of the steel pipe and welding or welding it. I'm making it.
Although FIG. 4 is not based on a patent document, it shows an example of the prior art.
For example, in order to attach the steel pipe reinforcing reinforcing bars 2 to the inner surface of the steel pipe 1 at two to five stages at equal intervals in the longitudinal direction, the conventional close attachment method is based on the following procedure.
1. At the mounting positions determined at equal intervals on the inner surface of the steel pipe 1, scoring is performed on all the circumferential lines on the inner surface of the steel pipe 1.
2. The ring-shaped reinforcing steel pipe reinforcing bar 2 having an open end is temporarily placed at the mounting position on the inner surface of the steel pipe 1 according to the score line.
3. The wedge 101 is driven between the open ends of the steel pipe reinforcing steel bars 2, the diameter of the ring-shaped steel pipe reinforcing steel bars 2 is increased, and the circumferential surface thereof is brought into close contact with the inner surface of the steel pipe 1. (Fig. 5)
4). Since the ring-shaped steel pipe reinforcing rebar 2 does not necessarily conform to the inner peripheral surface of the steel pipe 1 due to deformation of the steel pipe 1 or the steel pipe reinforcing steel reinforcing bar 2, by further hitting the steel pipe reinforcing steel bar 2 with a hammer 100 or the like, Adhere closely. (Fig. 5)
In addition, the prior art document of this invention is not found.
[0003]
In this conventional close fitting method, all the steps of tightly attaching the reinforcing steel bars for steel pipes to the inner surface of the steel pipe are performed manually, which requires not only a lot of work time, but also a person has to enter the steel pipe and work. There is a problem of heavy labor and high costs.
[0004]
[Problems to be solved by the invention]
The present invention was made to solve the above-described problem in the method of closely attaching a steel pipe reinforcing bar to a conventional steel pipe,
The purpose is to make the steel pipe reinforcing steel bar in close contact with the inner surface of the steel pipe, and to mechanize the contact work to shorten the work time and reduce the work cost.
[0005]
[Means for Solving the Problems]
The invention of claim 1 is a method for temporarily fixing a reinforcing steel bar for steel pipe before welding or welding the reinforcing steel to the inner surface of the steel pipe, the step of temporarily placing a plurality of reinforcing steel bars at predetermined positions in the steel pipe, inserting a contact means in the steel pipe to a plurality of contact means positioned in accordance with the predetermined intervals of the plurality of reinforcing rebar is placed to position the steel pipe to match the predetermined position in the axial direction of the plurality of reinforcing rebar A plurality of temporarily installed reinforcing bars and steel pipes sandwiched from the inside and outside of the steel pipe by a close contact means and a support device on the opposite side sandwiching the steel pipe at a position where there are a plurality of close contact means in the axial direction . a step of pressurizing the contact means at the same time, a step of rotating the steel pipe at a turning roll is for steel rotating steel pipe in a plurality of contact means for pressurizing a plurality of reinforcing rebar in the axial direction the same position of the steel pipe to rotate with the steel pipe A step of adhering simultaneously to the surface consists, contact means receives the support device the force by pressurizing a temporary fixing method for a steel pipe reinforcement rebar, characterized in that a plurality of reinforcing rebar simultaneously temporarily fixed.
The invention of claim 2 is a method for temporarily fixing a reinforcing bar for a steel pipe before welding or welding the reinforcing bar to the inner surface of the steel pipe, and a plurality of the reinforcing bars are temporarily arranged in the steel pipe of the plurality of reinforcing bars in accordance with a predetermined interval. A step of restraining the axial movement of each of the close contact means after positioning the close contact means, a step of temporarily placing a plurality of reinforcing bars in a predetermined position in the steel pipe, and a plurality of the close contact means of the plurality of reinforcing reinforcing bars inserting a contact means for positioning the axial direction of the steel pipe at a predetermined position and if Migihitsuji steel pipe, the support with the contact means, on the opposite side across the steel pipe locations with multiple contact means in the axial direction device and a step of applying simultaneously pressurizing the plurality of contact means a plurality of reinforcing rebar and steel pipe while sandwiching from inside and outside of the steel pipe was temporarily placed by the steps of rotating the steel pipe at a turning roll is steel pipe rotation, together with the steel tube Rotating compound A step of adhering at the same time the steel pipe inner surface by a plurality of contact means for pressurizing in the axial direction the same position of the reinforcing rebar steel pipe consists, contact means support device is subjected to forces due to the pressurized, a plurality of reinforcing rebar Is a temporary fixing method for reinforcing reinforcing bars for steel pipes.
The invention of claim 3 is a temporary fixing device for reinforcing reinforcing bars for steel pipe before welding or welding the reinforcing bars to the inner surface of the steel pipe, and a plurality of reinforcing bars arranged at predetermined positions in the steel pipe are brought into close contact with the steel pipe. The positions of the close contact means in the temporary fixing device are determined by constraining the intervals of the close contact means at predetermined intervals in the axial direction in accordance with the predetermined intervals of the close contact means and the plurality of reinforcing bars temporarily placed in the steel pipe. A positioning device, a moving device for inserting the plurality of contact means into the steel pipe to position the steel pipe so that the plurality of contact means are aligned with predetermined positions in the axial direction of the plurality of reinforcing bars, and a plurality of contact means are simultaneously added. A pressurizing device for pressing, a supporting device for supporting the steel pipe on the opposite side across the steel pipe at a position where there are a plurality of close contact means in the axial direction, a turning roll for rotating the steel pipe, and a plurality of close contact the means and the support device At the same time pressurized plurality of contact means a plurality of reinforcing rebar and steel pipe temporarily placed in a state of being sandwiched from steel inside and outside I, the force supporting device receives, thereby a plurality of reinforcing rebar that rotates with steel, the steel tube A temporary fixing device for reinforcing reinforcing bars for steel pipe, wherein the steel pipe inner peripheral surface is simultaneously brought into close contact by a plurality of close contact means that simultaneously pressurize at the same position in the axial direction.
According to a fourth aspect of the present invention, there is provided a device for temporarily fixing a reinforcing steel bar according to a third aspect of the present invention, wherein the steel pipe end abutting device positions the steel pipe by abutting against the steel pipe end when the contact means is inserted into the steel pipe. A temporary fixing device for reinforcing steel bars for steel pipes .
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a temporary fixing device for reinforcing steel bars for steel pipes according to the present invention, and FIG. 2 is a side view of the temporary fixing device for reinforcing steel bars for steel pipes shown in FIG.
[0021]
A temporary fixing device A for tightly attaching a steel pipe reinforcing steel bar connects an upper arm 13a and a lower arm 13b with a connecting portion 13c, and is composed of an inverted U-shaped device main body 13 and the like as viewed from the front of FIG. .
A plurality of pressure devices 6 are attached to the upper arm 13a, and the elastic members 6a that expand and contract the pressure devices 6 are driven by air pressure. A positioning device (set device) 4 including one shaft body 4a extending in the same direction as the upper and lower arms 13a and 13b is coupled to the distal end of the elastic member 6a.
[0022]
Referring to FIG. 2, the steel pipe 1 is rotatably supported by a turning roll (not shown) for rotating the steel pipe and a support roller 7a of a support device (backup device) 7 for holding the steel pipe.
Then, the steel pipe 1 and the reinforcing steel bar 2 for steel pipe are sandwiched between the floating V-shaped grooved roller (contact means) 3 and the left and right support rollers 7a.
Since the idle-type V-shaped grooved roller 3 is always pressed against the steel pipe 1 rotating at the same position, the position is corrected during the rotation of the steel pipe even if the temporarily reinforced reinforcing bars are slightly deviated.
[0023]
FIG. 3 is a schematic view for explaining a floating V-shaped grooved roller.
The loose V-shaped grooved roller 3 is rotatably attached to the shaft body 4a via a bearing such as a ball bearing 3a. A plurality of half spacers 5a and 5b are attached to the shaft body 4a of the positioning device (set device) 4, and are attached so as to surround the shaft body 4a with the two half spacers 5a and 5b.
The half spacers 5a and 5b are spacers for adjusting the interval between the floating V-shaped grooved rollers 3, and by changing this spacer, the interval between the floating V-shaped grooved rollers 3 can be freely adjusted. can do.
[0024]
A plurality of floating V-shaped grooved rollers 3 are fitted into predetermined positions of the shaft body 4a of the positioning device (set device) 4, and half spacers 5a and 5b are attached between the respective floating V-shaped grooved rollers 3. Then, each floating type V-shaped grooved roller 3 is positioned and set on the shaft body 4a.
The steel pipe reinforcing steel bar 2 is brought into close contact with the inner surface of the steel pipe 1 by a free-running V-shaped grooved roller 3.
The shape of the groove of the floating V-shaped grooved roller 3 may be an arc shape or no groove.
[0025]
A stopper 10 for positioning the steel pipe 1 by abutting against the end of the steel pipe 1 and a moving device 8 (cylinder, a cylinder, The end of the steel pipe is accurately positioned with the piston rod 8a).
The stopper 10 is moved by the moving device 8 via the connecting portion 9, the temporary fixing device main body 13, the pressure device 6, and the positioning device (set device) 4.
Inside the lower arm 13b of the temporary fixing device main body 13, the steel pipe 1 is supported by a support device (backup device) 7 including two support rollers 7a and a connecting member 7b for rotatably supporting the outer peripheral surface of the steel tube 1. The
A plurality of sliders 11 protruding from the grooves of the base 12 are attached to the outside of the lower arm 13 b of the temporary fixing device main body 13, and the sliders 11 slide along the grooves in the base 12.
A moving device 8 (cylinder 8, piston rod 8a) for moving the temporary fixing device main body 13 is attached to the base 12, and the distal end of the expansion / contraction member (piston rod) 8a of the moving device 8 driven by pneumatic pressure is connected to the connecting portion 9. It attaches to the temporary fixing apparatus main body 13 via.
[0026]
The operation of the temporary fixing device for reinforcing steel bar reinforcement according to the present invention will be described.
The steel pipe 1 is placed on the support roller 7a of the support device (backup device) 7, and the upper arm 13a and the positioning device (set device) 4 are placed inside the steel pipe (spiral steel pipe) 1. In this state, the inner surface of the steel pipe 1 is placed. The steel pipe reinforcing steel bar 2 is placed at a predetermined position.
[0027]
A slider 11 in which a telescopic member (piston rod) 8 a of the moving device 8 fixed to the base 12 having this structure is operated and the temporary fixing device main body 13 attached via the connecting portion 9 is engaged with the groove of the base 12. It is moved left and right by sliding.
When the left end of the steel pipe 1 is brought into contact with a steel pipe end abutting device composed of a stopper 10 fixed to the shaft body 4a of the positioning device (set device) 4 and the expandable member 6a of the pressurizing device 6 is lowered, the floating V-shaped The grooved roller 3 is placed on the reinforcing steel bar 2 for steel pipe.
[0028]
By raising and lowering the left and right support rollers 7a via the connecting member 7b by the elevating member 7c, the steel pipe 1 and the reinforcing steel bar 2 for steel pipe are sandwiched between the support roller 7a and the free-form V-shaped grooved roller 3.
The steel pipe 1 is rotated using a turning roll or the like (not shown), and a plurality of reinforcing bars 2 for steel pipe are simultaneously brought into close contact with the steel pipe 1.
Then, the reinforcing reinforcing bars 2 and the steel pipe 1 which are brought into close contact with each other are welded to make a steel pipe pile.
[0030]
【The invention's effect】
It is possible to simultaneously contact a plurality of steel pipes for reinforcing rebar steel pipe, the working time is reduced as compared with the conventional contact mounting operation time, also becomes less heavy work done within the steel pipe.
[Brief description of the drawings]
FIG. 1 is a front view of a temporary fixing device for reinforcing steel bars for steel pipes according to the present invention.
FIG. 2 is a side view of the temporary fixing device for reinforcing reinforcing bars for steel pipes shown in FIG.
FIG. 3 is a schematic view for explaining a floating V-shaped grooved roller.
FIG. 4 is a schematic view for explaining positioning for bringing a steel pipe reinforcing steel bar into close contact with the inner surface of the steel pipe.
FIG. 5 is an explanatory diagram of a conventional method for bringing a steel pipe reinforcing steel bar into close contact with the inner surface of the steel pipe.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Steel pipe (spiral steel pipe), 2 ... Reinforcing bar for steel pipes, 3 ... Rolling roller with V-shaped groove, 4 ... Positioning device (set device), 5 ... Spacer, 6 ... Pressure device, 7 ... Support device ( Backup device), 8 ... moving device, 9 ... connecting portion, 10 ... stopper, 11 ... slider, 12 ... base, 13 ... temporary fixing device body,

Claims (4)

A method for temporarily fixing a reinforcing bar for a steel pipe before welding or welding the reinforcing bar to the inner surface of the steel pipe,
Temporarily placing a plurality of reinforcing bars at predetermined positions in the steel pipe;
In order to position the steel pipe so that the plurality of contact means positioned in accordance with a predetermined interval of the plurality of reinforcing bars to be temporarily placed are aligned with predetermined positions in the axial direction of the plurality of reinforcement reinforcing bars , the contact means is inserted into the steel pipe . Process,
A plurality of contact means in a state where a plurality of reinforcing bars and steel pipes temporarily placed by the contact means and a support device on the opposite side sandwiching a steel pipe at a position where there are a plurality of contact means in the axial direction are sandwiched from inside and outside of the steel pipe Simultaneously pressurizing,
Rotating the steel pipe with a turning roll for rotating the steel pipe;
A plurality of reinforcing bars that rotate together with the steel pipe are simultaneously brought into close contact with the inner peripheral surface of the steel pipe by a plurality of contact means that pressurize at the same position in the axial direction of the steel pipe,
The support device receives the force generated by the close contact means pressurizing,
A temporary fixing method for reinforcing reinforcing bars for steel pipes, wherein a plurality of reinforcing bars are temporarily fixed simultaneously. A method for temporarily fixing a reinforcing bar for a steel pipe before welding or welding the reinforcing bar to the inner surface of the steel pipe,
A step of constraining the movement of each contact means in the axial direction after positioning the intervals of the plurality of contact means according to a predetermined interval temporarily placed in the steel pipes of the plurality of reinforcing bars;
Temporarily placing a plurality of reinforcing bars at predetermined positions in the steel pipe;
Inserting a contact means in order to position the steel pipe steel pipe to a plurality of contact means is a predetermined position and covering the axial direction of the plurality of reinforcing rebar Migihitsuji,
A plurality of contact means in a state where a plurality of reinforcing bars and steel pipes temporarily placed by the contact means and a support device on the opposite side sandwiching a steel pipe at a position where there are a plurality of contact means in the axial direction are sandwiched from inside and outside of the steel pipe Simultaneously pressurizing,
Rotating the steel pipe with a turning roll for rotating the steel pipe;
A plurality of reinforcing bars that rotate together with the steel pipe are simultaneously brought into close contact with the inner peripheral surface of the steel pipe by a plurality of contact means that pressurize at the same position in the axial direction of the steel pipe,
The support device receives the force generated by the close contact means pressurizing,
A temporary fixing method for reinforcing reinforcing bars for steel pipes, wherein a plurality of reinforcing bars are temporarily fixed simultaneously. A temporary fixing device for reinforcing reinforcing bars for steel pipe before welding or welding reinforcing reinforcing bars to the inner surface of the steel pipe,
A close-contact means for closely attaching a plurality of reinforcing bars arranged at predetermined positions in the steel pipe to the steel pipe;
A positioning device for positioning the positions of the respective contact means in the temporary fixing device by constraining the intervals of the plurality of contact means at a predetermined interval in the axial direction according to the predetermined intervals of the plurality of reinforcing bars temporarily placed in the steel pipe ;
A moving device for inserting the plurality of contact means into the steel pipe to position the steel pipe so that the plurality of contact means are aligned with predetermined positions in the axial direction of the plurality of reinforcing bars;
A pressurizing device for simultaneously pressurizing a plurality of contact means;
A support device for supporting the steel pipe on the opposite side across the steel pipe at a position having a plurality of close contact means in the axial direction from the outside ;
A turning roll for rotating the steel pipe,
A plurality of simultaneously pressurizing the plurality of contact means while holding the plurality of reinforcing rebar and steel pipes placed temporarily from the steel pipe and out the contact means and the support device, the force supporting device receives, thereby a plurality of rotating together with the steel tube A temporary fixing device for reinforcing steel bars for steel pipe, wherein the reinforcing steel bars are simultaneously brought into close contact with the inner peripheral surface of the steel pipe by means of a plurality of close contact means that pressurize at the same position in the axial direction of the steel pipe. In the apparatus for temporarily fixing the reinforcing reinforcing bar according to claim 3 in a steel pipe,
A temporary fixing device for reinforcing reinforcing bars for steel pipes, comprising a steel pipe end abutting device for positioning the steel pipe by abutting against the steel pipe end when inserting the close contact means into the steel pipe .

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