JPH10296342A - Production of twisted flat steel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the precision of a torsion flat steel and to remarkably shorten the working time by respectively fixing both ends of a flat steel, twisting the flat steel by rotating one side end while drawing one more side end, and producing the torsion flat steel. SOLUTION: In a rotary part 1 of a machine, a fixing part 3a to tighten and fix a flat steel 14 is provided at the end of a rotary shaft 2, a sprocket 4 is attached to the other side end, to be engaged with a chain and rotated with a motor 5. On the other band, a moving part 6 in which roller 7 is attached to its fixing part 3b to tighten and fix the flat steel 14 moves right and left along the upper frame of the body 8. Then, a wire 9 is attached on the rear of the moving part and a weight 11 is hung through a pulley 10. A stand 12 attached to a hydraulic cylinder 13 is provided under the weight, and the stand is moved up and down with the hydraulic cylinder 13. When the rotary shaft is rotated with the motor and the flat steel 14 is twisted, because it is made gradually shorter, the moving part is moved to the rotary part in the state of hanging the weight 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND ART The twisted flat steel as shown in FIG. 7 is used for decoration on a vertical rail of a handrail or the like, but it can also be used for external transportation. TECHNICAL FIELD The present invention relates to a method for easily manufacturing a high-precision twisted flat steel by twisting a flat steel.

[0002]

2. Description of the Related Art The applicant first puts a flat steel to be loosely fitted into a round pipe, and furthermore, puts an appropriate number of steel balls to be loosely fitted on both sides of the flat steel and fixes the ends of the flat steel. Invented a method of making a high-precision torsion flat steel which is straight and has a uniform torsion pitch by turning the other end by grasping and turning it.
No. 5198. Next, as a method for making this high-precision twisted flat steel faster, FIG.
As shown in FIG. 6, a mold (17) is made by dividing a round pipe into two pieces, a flat steel (14) and a ball (18) are placed in the mold, and the two molds are combined, and the ends of the flat steel are grasped. We invented a twisting method and filed an application under Japanese Patent Application No. 8-352620.

[0003]

However, the method of using the split mold has a problem that a flat steel and a ball are placed in the mold, the mold is closed, and after twisting, the mold is opened to remove the flat steel and the ball. Therefore, the present invention is to make it possible to produce a high-precision twisted flat steel in a large amount by a simpler method.

[0004]

The method comprises fixing one end of a flat bar, grasping the other end and turning the flat bar to twist the flat bar, and hanging a weight on the fixed end. , With a constant tension. In this way, when the flat steel is continuously stretched and twisted, it is possible to produce an extremely accurate twisted flat steel that is straighter than before and has a more accurate twist pitch. In addition, the work before and after, which was troublesome before and after, can be simply performed by installing and removing the flat steel, and the twisting can be performed much faster than before.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method will be described with reference to a machine for manufacturing flat torsion bars, which twists flat bars in this manner.
FIG. 1 shows a front view of a machine for manufacturing a flat steel bar when the flat bar is set on the machine, FIG. 2 shows a front view of the flat bar manufacturing machine when the flat bar is almost twisted, and FIG. 3 shows a plan view of FIG. . The rotating part (1) of the machine has a fixed part (3a) at the end of the rotating shaft (2) for tightening and fixing flat steel, and a sprocket (4) at the other end.
Is attached and the chain is hung so that it is rotated by the motor (5). On the other hand, the moving part (6) has a roller (7) attached to a fixing part (3b) for tightening and fixing the flat steel, and moves left and right along the upper frame of the main body (8). The wire (9) is attached behind the moving part, and the weight (11) is hung via the pulley (10). Below the weight is a platform (12) attached to a hydraulic cylinder A (13), which is raised and lowered by the hydraulic cylinder A.

Next, a method of working with this machine will be described. First, as shown in FIG. 1, a weight is received by a base, and a tension is not applied to the moving part. Then, an end of the flat steel (14) is fastened to a fixing part of the rotating part, and the other end is fixed to the moving part. Tighten to the part. Next, the rotating shaft is rotated by the motor to twist the flat steel. When the flat steel is twisted, the length gradually decreases, and as shown in FIG. 2, the moving part moves toward the rotating part with the weight lowered. In this way, the flat steel is twisted while constantly being pulled with a constant force. When the predetermined twisting is completed, the rotation is stopped, the base is raised, the weight is received, the tension is released, both fixing parts are loosened, and the twisted flat steel (15) is taken out. Depending on the type of flat steel, the weight is changed to adjust the pulling force.

In the above machine for manufacturing a twisted flat bar, the weight is lowered as a method of pulling the flat bar. Next, another embodiment using a hydraulic cylinder will be described with reference to FIG. First, the hydraulic cylinder B (16) is attached and fixed to the end of the main body (8), and the rear of the moving part (6) and the piston rod of the hydraulic cylinder B are connected by a wire (9). Therefore, when the flat steel starts to be twisted, the piston rod comes out while the hydraulic pressure is working, so that the moving portion is constantly under tension, and can be twisted in exactly the same way as using a weight. The pulling force can be freely changed by adjusting the oil pressure.

Each of the two torsion flat steel manufacturing machines described above automates the torsion operation by electrically controlling the rotation of the torsion shaft and the vertical movement of the table or the movement of the piston rod by a computer, thereby further increasing the width. Work efficiency can be improved.

[0009]

As described above, according to the present invention, when twisting a flat steel, the flat steel is twisted while being pulled at a constant tension, thereby forming a mold in which a conventional round pipe is divided into two, and the mold is formed in the mold. Compared with the method of placing a flat steel and a ball and twisting the two molds together, the accuracy of the twisted flat steel was further improved, and the working time was able to be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a twisted flat bar manufacturing machine using the method of the present invention, showing a state where a flat bar is set on the machine.

FIG. 2 is a front view of a twisted flat bar production machine using the method of the present invention, showing a state where the flat bar has been almost twisted.

FIG. 3 is a plan view of the twisted flat steel manufacturing machine shown in FIG.

FIG. 4 is a front view of another twisted flat bar production machine using the method of the present invention, showing a state where the flat bar has been twisted.

FIG. 5 is an explanatory view of a conventional method for producing a twisted flat steel.

FIG. 6 is a sectional view taken along line AA ′ of FIG. 5;

FIG. 7 is a perspective view of a twisted flat steel.

[Explanation of symbols]

1 rotating part 2 rotating shaft 3a, 3b
Fixed part 4 Sprocket 5 Motor 6 Moving part 7 Roller 8 Main body 9 Wire 10 Pulley 11 Weight 12 units 13 Hydraulic cylinder A 14 Flat steel 15 Torsion flat steel 16 Hydraulic cylinder B 17 type 18 ball

Claims (1)

[Claims] 1. A method for manufacturing a flat torsion bar, comprising fixing both ends of a flat bar and pulling one end while rotating the other end to twist the flat bar to produce a flat bar. Method.