JPH0138566B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a metal tube containing a filament with extra length, in which the filament is housed with an extra length in a metal tube body.

In order to protect the filamentous body from tension, a metal tube 3 containing a filament body with an extra length has been proposed, in which the filament body 2 is housed in a metal tube body 1 with an extra length, as shown in FIG. There is.

However, it is actually very difficult to house the filament 2 in the metal tube body 1 with extra length. Therefore, when the metal tube 3 containing the filament body 3 is twisted or wound up in a later process, or when tension is applied during use, the filament body 2 in the metal tube body 1 is easily broken. It was hot.

An object of the present invention is to provide a method for manufacturing a metal tube containing a filament with extra length, which can easily provide an extra length to the filament in the metal tube body.

The method for manufacturing a metal tube containing a filament with an extra length according to the present invention includes first winding a metal tube containing a filament containing a filament in a metal tube body around the outer periphery of a first rotating body. After that, the winding start end side is pulled out and the first feeding means is rotated at approximately the same circumferential speed as the first rotating body, and the second feeding means is rotated at a circumferential speed slower than that of the first rotating body. , and then wrapped around a second rotating body which is being rotated at approximately the same circumferential speed as the second feeding means, and the first and second feeding means are wound on both sides of the first and second feeding means. compressing the metal tube body in its longitudinal direction by utilizing the difference in feeding speed of the first and second feeding means with the filament body fixed to the metal tube body by a second rotating body; It is characterized in that an extra length is provided to the inner filament.

Embodiments of the present invention will be described in detail below with reference to FIGS. 2 to 4. First, a metal tube 3' containing a filament body is manufactured, in which a filament body 2 is housed in a soft metal tube body 1 made of aluminum or copper along its longitudinal direction. The manufacturing method includes, for example, attaching a metal tape (not shown) vertically to the filament body 2, forming the metal tape so that the filament body 2 is built in, and forming the joint between the formed metal tapes. Manufactured by welding. The metal tube 3' containing the filament is wound around the first rotating body 5 made of a drum or the like for about two turns through the presser roll 4, and then the winding start end side is pulled out and the first rotating body 5 is wrapped around the first rotating body 5. The material is passed through the first feeding means 6 which is rotated at approximately the same circumferential speed, then passed through the second feeding means 7 which is rotated at a slower circumferential speed than the first feeding means 6, and then passed through the second feeding means 7 which is rotated at a slower circumferential speed than the first feeding means 6. It is wound around a second rotary body 8, which is a winder, which is rotated at approximately the same circumferential speed as the feeding means. The first and second rotating bodies 5 and 8 and the first and second feeding means 6 and 7 are rotationally driven by a driving means (not shown) so that the above-mentioned circumferential velocity relationship is established. The first feeding means 6 consists of a pair of upper and lower rolls 6A that sandwich the metal tube body 1 from above and below, and a pair of left and right rolls 6B that sandwich it from the left and right, and as described above, these rolls 6A and 6B are adapted to be rotationally driven at a predetermined circumferential speed by a driving means (not shown). Second
The feeding means 7 also consists of a pair of upper and lower rolls 7A that sandwich the metal tube body 1 from above and below, and a pair of left and right rolls 7B that sandwich it from the left and right directions, and as described above, these rolls 7A , 7B are also driven to rotate at a slower circumferential speed than the first feeding means 6 by a driving means (not shown).

While the metal tube body 1 sequentially passes through the first feeding means 6 and the second feeding means 7, it is compressed in the longitudinal direction by about 0.3 to 1%, for example, depending on the speed difference between the two. As a result, the filament 2 in the metal tube main body 1 is given a relatively extra length, and the metal tube 3 containing the filament with extra length is continuously manufactured. In particular, in this method, the linear body 2 in the metal tube body 1 is fixed on both sides of the first and second feeding means 6, 7 due to the presence of the rotating bodies 5, 8, so that the metal tube body 1 is compressed. Therefore, the extra length is effectively added.

Note that when winding is performed after the second rotating body 8, the second rotating body 8 may be a simple rotating body like the first rotating body 5.

Experimental example 1 A metal tube containing a filament body, which is made by housing a filament body with an outer diameter of 2 mmφ in an aluminum tube body with an outer diameter of 4.2 mmφ and a wall thickness of 0.5 mm, was inserted into the first rotating body (drum) with an outer diameter of 500 mmφ. The material was wound around the outer circumference for two turns, then passed through a first feeding means and a second feeding means each having a roll diameter of 80 mmφ, and then wound around a second rotating body having an outer diameter of 600 mmφ. The circumferential speed of the first rotating body is 3.50 m/min, the circumferential speed of the first feeding means is 3.50 m/min, and the circumferential speed of the second feeding means is
The peripheral speed of the second rotating body was 3.48 m/min. By this method, the aluminum tube body was compressed by about 0.3% in the longitudinal direction, and an extra length of about 0.3% was given to the filament.

Experimental example 2 Inside the copper tube body with an outer diameter of 6.0 mmφ and a wall thickness of 0.4 mm, an outer diameter of 2.0 mm is installed.
A filament-filled metal tube containing a filament of mmφ is wound two turns around the outer periphery of a first rotating body with an outer diameter of 500 mmφ, and then the first feeding means with a roll diameter of 80 mmφ and the second Pass it through the feeding means, and then reduce the outer diameter to 600mmφ.
It was wound up on the second rotating body. The circumferential speed of the first rotating body is 4.00 m/min, and the circumferential speed of the first feeding means is 4.00 m/min.
The peripheral speed of the second feeding means was 3.96 m/min, and the peripheral speed of the second rotating body was 3.97 m/min. In this case, since some slipping occurred between the second feeding means and the copper tube body, the circumferential speed of the second rotating body was slightly increased. With this method, the copper tube body is approximately
It was compressed by 0.5% and was able to give approximately 0.5% extra length to the striatum.

Note that the first and second feeding means are not limited to those formed by #-shaped roll groups,
For example, a structure in which the metal tube body is fed by being sandwiched between an upper endless belt that is stretched over a plurality of upper rolls arranged in the longitudinal direction, and a lower endless belt that is stretched around a plurality of lower rolls arranged in the longitudinal direction. But that's fine.

The filament 2 to be protected may be, for example, a thin insulated wire or a cored optical fiber.

As explained above, in the method for manufacturing a metal tube with an extra length containing a filament according to the present invention, the metal tube containing a filament is passed through the first feeding means, and then the first feeding means feeds the metal tube at a feeding rate of The first and second feeding means
Since the metal tube body is compressed in the longitudinal direction between the feeding means and a relative extra length is given to the inner filament, it is easy to manufacture a metal tube with an extra length of filament. Can be done. In particular, in the present invention, the first and second
Due to the presence of the first and second rotating bodies on both sides of the feeding means, the filamentary body inside the metal tube body is fixed on both sides of the first and second feeding means, so that the metal tube body is compressed. Therefore, the extra length is effectively added. Further, according to the present invention, extra length can be added without stopping the feeding of the metal tube containing the filament, so that the metal tube containing the filament with extra length can be manufactured efficiently.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of a metal tube with a filament with extra length.
FIGS. 2 and 3 are a side view and a plan view showing an example of an apparatus for carrying out the method of the present invention, and FIG. 4 is a longitudinal sectional view showing a state in which extra length is provided by the method of the present invention. DESCRIPTION OF SYMBOLS 1...Metal tube main body, 2...Striated body, 3'...Metal tube containing a filament body, 3...Metal tube containing a filament body with extra length, 5...First rotating body, 6...First feeding means, 7...Second feeding means, 8...Second rotating body.

Claims (1)

[Claims] 1. After the metal tube containing the filament body containing the filament body is once wound around the outer periphery of the first rotating body, the winding start end side thereof is pulled out and connected to the first rotating body. The first feeding means rotated at approximately the same circumferential speed and the second feeding means rotated at a slower circumferential speed than the first feeding means, and then the second feeding means
The filament is wound around a second rotating body that is rotated at approximately the same circumferential speed as the feeding means, and the filament is wound around the first and second rotating bodies on both sides of the first and second feeding means. is fixed to the metal tube body, the metal tube body is compressed in its longitudinal direction by utilizing the difference in the feeding speed of the first and second feeding means, and the linear body inside is compressed. A method for manufacturing a metal tube containing a filament with extra length, characterized by imparting length.