JP3023583B2 - Manufacturing method of torsion angle pipe and torsion flat steel, and torsion angle pipe manufacturing machine. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for twisting a square pipe or flat steel into a torsion pipe or torsion flat steel, and to a machine for producing the torsion square pipe or torsion flat steel.

[0002]

2. Description of the Related Art As shown in FIG. 1 and FIG. 2, a steel bar having a twisted square or flat steel is attached to a vertical bar of a handrail for decoration. Therefore, first of all, regarding twisted square steel, it is not made by twisting square steel, but by melting iron or aluminum into a mold with twisted square steel. Therefore, it is heavy and expensive.

[0003]

Therefore, if one end of the square steel is fixed and the other end is turned and twisted, a weak spot is inevitably formed, so stress is concentrated there, and only the twist is twisted, and it is never uniform. I can't twist. Even more, if the square pipe is twisted, it will be cut from weak spots. Therefore, if the square pipe can be made evenly and without threading, it will be lighter and cheaper than conventional castings.

[0004]

In this solution, as shown in FIG. 5, a slightly smaller round pipe is inserted in advance into a square pipe. Then, fix one end of the square pipe and twist the other end to twist it uniformly and neatly everywhere.

[0005]

In the process of twisting, the inner diameter of the square pipe becomes smaller, and when it hits the inner round pipe, it will no longer be twisted there. Therefore, by twisting the inner surface of the square pipe until it entirely hits the round pipe, the pitch of the twist becomes uniform everywhere and it is possible to twist neatly. In addition, after the square pipe is twisted, turn it slightly backward to untwist,
The inner round pipe can be pulled out.

Next, regarding the twisted flat steel, if one end of the flat steel is fixed and the other end is twisted, the flat steel will bend and cannot be twisted uniformly. Therefore, it is the fact that it is baked and corrected. Therefore, as shown in Fig. 6, when the flat steel is put into a round pipe where the flat steel just enters, and the flat steel is twisted, the twist pitch becomes uniform everywhere as well as the square pipe and twists neatly. You can do things. The reason is that when you start twisting the flat bar, the flat bar
Protrudes from the place and begins to deform. Then the inner wall of the round pipe
Hits, and the part stops deforming. Then
Deformation of a portion having a gap proceeds. In this way, the round pipe
The torsion is completed when the deformation spreads over the entire length.
Therefore, a straight torsion flat bar with a uniform pitch can be produced.
is there.

[0007]

Next, using this method, a torsion square pipe,
An embodiment of a machine for producing a twisted flat steel will be described with reference to FIGS. First, torsion angle pipes are manufactured.
To describe the manufacturing machine of (1), a torsion (2) is provided at the end of the machine base (1). The torsion portion has a torsion shaft (3) attached to the bearing, and the tip of the torsion shaft is square so that the inside of the square pipe can enter. The torsion shaft is slowly rotated forward or backward by the reduction motor A (4).

Next, rollers (6) are attached to both sides of the moving section (5), so that the moving section (5) can move lightly along the upper frame of the machine base. Furthermore, four guide rollers (7) are attached to the center of the moving part,
A square pipe passes through the guide roller with a slight gap. Endless chains (8) are mounted on both sides of the moving unit, and the moving unit is pulled by driving the chain. The chain is driven by a chain driving unit (9) provided at the other end of the machine base, and the chain driving shaft (11) is rotated by a deceleration motor B (10) to drive the chain.

Next, a method for manufacturing a torsion square pipe using this machine will be described with reference to FIGS. 5A and 5B. First, the moving part (5) is brought closer to the torsion shaft ( 3). The square pipe (12) is passed through the guide roller (7) of the moving unit, and the tip is inserted into the square shaft at the tip of the torsion shaft (3).
Then, the aforementioned round pipe (13) is inserted into the square pipe. Then, the torsion shaft is slowly turned in the direction of the arrow to start twisting the square pipe, and then the moving part is gradually moved in the direction of the arrow to complete the torsion square pipe.
At the end of the twist, slightly twist the square pipe back and remove the round pipe inside.

Next, the machine twists the flat steel and twists the flat steel.
You can also make steel. In the case of manufacturing a twisted flat bar, as shown in FIG. 6, the guide roller of the moving unit is removed, and a flat metal fixing bracket A (14) is attached instead. Instead of the square shaft at the end of the torsion shaft (3), a flat steel fixing bracket B
(15) Install. Then, the flat steel (16) is passed through the round pipe (13), and both ends of the flat steel are fixed to the fixing brackets A and B, respectively. By turning the torsion shaft slowly in such a state, a torsion flat steel is completed.

[0011]

As described above, the present invention makes it possible to twist a square pipe or flat steel, which could not be achieved conventionally, accurately and easily while keeping it straight. For this reason, a torsion square pipe or a torsion flat steel can be manufactured at a low cost, and has an effect of being widely used for various decorations.

[Brief description of the drawings]

FIG. 1 is a perspective view of a torsion angle pipe manufactured using the method of the present invention.

FIG. 2 is a perspective view of a twisted flat steel manufactured using the method of the present invention.

FIG. 3 is a front view of the torsion angle pipe manufacturing machine of the present invention.

FIG. 4 is a plan view of the torsion angle pipe manufacturing machine of the present invention.

FIG. 5 (a) is an explanatory view of manufacturing a torsion angle pipe.

FIG. 5 (b) is a left side view of FIG. 5 (a).

FIG. 6 is an explanatory view of manufacturing a twisted flat steel.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Machine stand 2 Torsion part 3 Torsion axis 4 Reduction motor A 5 Moving part 6 Roller 7 Guide roller 8 Chain 9 Chain drive part 10 Reduction motor B 11 Chain drive shaft 12
Square pipe 13 Round pipe 14 Fixing bracket A 15
Fixing bracket B16 flat steel

Claims (3)

(57) [Claims] 1. Inside a square pipe, the inside diameter of said square pipe
A round pipe with a smaller outer diameter than the square pipe
Put, characterized in that twisting the square pipes, the production method of the twist angle pipe. 2. Put a flat steel that fits loosely into a round pipe,
Characterized in that twisting the flat bar, the manufacturing method of the twisted flat bar. 3. A torsion shaft (3) for fixing one end of a square pipe is provided at an end of a machine base (1) which is long laterally, and this torsion shaft is rotated by power, and then a guide is provided around the outer periphery of the square pipe. A moving part (5) is provided to prevent the square pipe from turning by approaching the roller (7), and a power for pulling the moving part is provided at the other end of the machine base so that the moving part is mounted on the upper surface of the machine base. Square pie on a torsion pipe manufacturing machine
It is characterized by attaching a round pipe to put in the
Machine for manufacturing twisted square pipes.