JPH0620541A - Manufacturing device for high-frequency cable - Google Patents

Abstract

PURPOSE:To prevent periodical or nonperiodical flawing or partial deformation, etc., of a corrugated pipe by interposing a caterpiller take-up motion between a corrugator and a winder, and exerting the corrugated pipe delivered from the corrugator with constant tension using a take-up force control means. CONSTITUTION:A comparison operation controller uses a reference tension reference value with a detected value from a distortion gauge, thereby controlling the speed of a drive motor M to increase or reduce the same. Then a detected value from a corrugation linear velocity detector is simultaneously input for computations, so that the tension is kept at an optimum value. The tension of the corrugated pipe 1 delivered from the corrugator 13 is thus held constant and the pitch of the waves of the corrugated pipe 1 is held constant so as to prevent the corrugated pipe 1 from being flawed periodically or nonperiodically.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high frequency cable manufacturing apparatus.

[0002]

2. Description of the Related Art A corrugated waveguide or corrugated cable for high frequency transmission is provided with a corrugated tube (corrugated tube) having an oval or circular cross section.

By the way, the above corrugated tube of the high-frequency cable has low transmission loss and V.V. S. W. R. Strict performance is required such that

For example, as a manufacturing apparatus of the coaxial cable 2 for high frequency transmission having the circular corrugated tube 1 shown in FIG. 6, the one shown in FIG. 8 has been conventionally used.

That is, 31 is a sizing and 32 is a welding torch. As shown in FIG. 6, a tape-shaped copper plate is gradually wound around a core composed of a copper tube 34 as an inner conductor and an insulator 35 of ultra-high-foam polyethylene to form a circular cross section, which is then surrounded and covered. Send it to the sizing 31 from the direction of arrow 33,
It is formed into a predetermined circular tube, and immediately after that, it is welded by a welding torch 32 so that a longitudinal seam is formed to form a smooth circular tube with no wave.

Reference numeral 36 denotes an endless track type take-up machine for pipe making, which applies a pulling force for allowing the circular pipe or the like to pass through the sizing 31 shown in FIG. Granted.

A corrugator 37 is provided on the downstream side of the corrugator 37, which corrugates a smooth circular tube in a ring shape. That is, the corrugated tube 1 as shown in FIG. 6 can be formed.

After that, excess oil is removed by an oil cleaner 38 and wound by a winder 39 (a state without the external insulating layer 40 in FIG. 6 can be obtained).

Then, between the corrugator 37 and the winder 39,
A take-up dancer 41 is interposed to apply tension to the product to be taken up.

[0010]

However, in the conventional wind-up dancer 41, the additional tension cannot be increased relatively, and the hiccup in the range A between the corrugator 37 and the winder 39. Cause a phenomenon.

When this hiccup phenomenon occurs, the vibration (sway) is transmitted to the corrugator 37, and the wave pitch of the corrugated tube 1 (see FIG. 6) cannot be made uniform with high accuracy. That is, pitch disturbance appears periodically and aperiodically in the corrugated tube.

As described above, the V. S.
W. R. However, if the wave pitch of the corrugated tube 1 cannot be made uniform with high accuracy, the V. S. W. R. The characteristics cannot be improved and stabilized beyond a certain value. In addition, there is a problem in that the appearance also deteriorates.

[0013]

A high frequency cable manufacturing apparatus according to the present invention comprises a corrugator for corrugating a pipe body,
An endless track type take-up machine was provided between the corrugator and a take-up machine for taking up the corrugated pipe.

Further, the endless track type take-up machine is provided with a take-up force control means so as to make it possible to apply a constant tension to the corrugated pipe fed from the corrugator.

[0015]

The endless track type take-up machine interposed between the corrugator and the winding machine stabilizes and equalizes the tension of the corrugated pipe delivered from the corrugator. Along with this, it is possible to prevent periodic and aperiodic pitch disturbance in the corrugated pipe corrugated by the corrugator, improve the electrical characteristics of the high-frequency cable, and improve the appearance.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated embodiments will be described below.

FIG. 1 schematically shows an example of an apparatus for manufacturing the corrugated coaxial cable 2 shown in FIG. 6 as a high frequency cable.

In the figure, 3 is a tape supply,
A tape-shaped strip of copper or the like as a material for the corrugated pipe 1 in FIG. 6 is fed out.

The fed strip material is passed through the tape cleaning device 4 and then cut into a predetermined width by a slitter 5 and sent to the pipe forming device 6.

Reference numeral 7 is a scrap winder for winding up waste material generated from the slitter 5.

The core 8 comprising the inner conductor 34 such as the copper pipe shown in FIG. 6 and the insulator 35 covering the inner conductor 34 is manufactured in advance in a separate process, and the core supply 9 wound in a reel is upstream. The core 8 is fed to the center in the middle of a pipe forming process in which the tape-shaped strip is gradually wound into a circular cross section by the pipe forming device 6.

10 is a sizing, 11 is a welding torch,
A pipe having a seam sent from the pipe forming device 6 is formed into a predetermined diameter and the seam is welded to manufacture a circular pipe 17 having a longitudinal weld seam and a smooth surface.

Reference numeral 12 is a first endless track type take-up machine for pipe making, and applies a pulling force for feeding the raw material from the tape supply 3 and the core supply 9 and passing the pipe making device 6 and the sizing 10. .

A corrugator 13 is arranged downstream of the first endless track take-up machine 12, and an oil cleaner 14 is provided downstream thereof.

Reference numeral 15 is a winding machine for winding a semi-finished product having the corrugated tube 1 (which does not cover the outer insulating layer 40 of FIG. 6) as the outermost layer.

A second endless track type take-up machine 16 for controlling the tension of the corrugated pipe 1 is provided between the corrugator 13 and the take-up machine 15.

In FIG. 1 and FIG. 2 showing the main part thereof, the corrugator 13 is provided with a drive motor 18 and a power transmission mechanism 19 including a sprocket and a chain for power transmission thereof, and the power transmission mechanism. A corrugated linear velocity detector 20 is attached to a part of 19.

In the example shown in FIG. 2, the detector 20 is attached to a part of the output shaft of the drive motor 18.

Further, as clearly shown in FIG. 2, the circular tube 17 having the smooth surface is corrugated by the corrugator 13 and sent as a corrugated tube 1 (see FIG. 6) in the direction of arrow B.

This corrugated tube 1 is connected to a pair of endless track bodies 16a,
The second endless track type take-up machine 16 which applies a predetermined tension while being pressed by 16a is slidable as shown by arrows C and D, and through a linear motion guide mechanism 21 such as a linear guide,
It is mounted or mounted on the support base 22 (that is, in a floating state).

Reference numeral 23 is a restricting member that prevents the second endless track type take-up machine 16 from moving in the direction of the arrow D.
By attaching the strain gauge 24 to 23, the magnitude of the reaction force of the force with which the second endless track take-up machine 16 pulls the corrugated pipe 1 is measured.

That is, by the strain gauge 24, the regulating member 23
Second endless track type take-up machine by measuring the stress of
The tension F applied to the corrugated pipe 1 can be obtained by 16.

M is a drive motor of the second endless track type take-up machine 16 and feeds back the detected values (measured values) of the corrugated linear velocity detector 20 and the strain gauge 24 as shown in FIG. The speed is controlled. In this way, the take-up force control means 29 for applying a constant tension to the corrugated pipe 1 sent from the corrugator 13 is provided.

The take-up force control means 29 will be described in more detail. Reference numeral 25 is a comparison / arithmetic / controller, and the second endless track take-up machine 16 pulls the corrugated pipe 1 by the reference tension setting device 26 in advance. The reference value of the tension F is input and compared with the detected value (measured value) from the strain gauge 24 to increase / decrease the rotation speed (speed) of the drive motor M. At this time, the detected value from the corrugated linear velocity detector 20 is also input for calculation at the same time, and the tension F is constantly maintained at an optimum value.

In this way, since the tension F of the corrugated pipe 1 sent from the corrugator 13 is made constant, the corrugator 13
Wave pitch of corrugated tube 1 corrugated by is constant (uniform)
Becomes In addition, it is possible to prevent the corrugated tube 1 from being damaged periodically or aperiodically.

Next, FIGS. 4 and 5 show an outline of an apparatus for manufacturing the corrugated tube 1 made of thin copper having an oval cross section in the oval flexible waveguide 27 illustrated in FIG. 7 as a high frequency cable. It is the figure shown.

FIGS. 4 and 5 respectively correspond to FIGS. 1 and 2 of the previous embodiment, and the same reference numerals have substantially the same construction, so that the description of the overlapping portions may be omitted.

As shown in FIGS. 4 and 5, in the manufacturing apparatus of the corrugated tube 1 having an oval cross section, a sinking 28 is added downstream of the corrugator 13 and (in FIG. 1 of the previous embodiment). There is no core supply 9. That is, the tape-shaped material fed from the tape supply 3 is passed through the tape cleaning device 4, cut into a predetermined width by the slitter 5, wound in a circular cross-section by the pipe forming device 6, and welded at the seam by the welding torch 11. Then, the circular pipe 17 is formed.

The circular pipe 17 is taken by the first endless track type take-up machine 12 and sent to the corrugator 13 (similar to the previous embodiment) to continuously form a corrugated pipe having a circular cross section and draw it. Subsequently, the sinking 28 is performed to transform the cross section into an oval cross section.

The sinking 28 is held by an arm 30 integrally extending from the body 16b of the second endless track type take-up machine 16. Therefore, the passage resistance that the corrugated pipe having a circular cross section passes through the sinking 28 to be deformed into an oval cross section is not shown in the strain gauge 24 at all.

The other construction of the second endless track type take-up machine 16 of this embodiment and the point that the take-up force control means 29 shown in FIG. 3 are additionally provided are the same as in the previous embodiment, and the corrugator is used.
The tension of the circular corrugated tube between 13 and the sinking 28 is controlled to be constant.

The manufacturing apparatus shown in FIGS. 4 and 5 has the advantage that the manufacturing process is tandem.

[0043]

According to the present invention, the corrugator has the above-mentioned structure.
Since the tension F of the corrugated pipe sent from 13 is stably and constantly maintained, corrugation processing by the corrugator 13 is always performed under a constant condition, and the corrugated pipe 1 is periodically or aperiodically damaged. It is possible to prevent sticking, local deformation, and pitch disturbance.

Accordingly, the V.V. of a high-frequency cable such as a corrugated waveguide or a corrugated coaxial cable using such a highly accurate corrugated tube 1 is used. S. W. R. The electrical characteristics such as are stable and good, and the appearance is also good.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a main part of FIG.

FIG. 3 is a block diagram showing an example of a take-up force control means.

FIG. 4 is a schematic configuration diagram of another embodiment.

5 is an explanatory view of a main part of FIG.

FIG. 6 is an explanatory diagram of a coaxial cable.

FIG. 7 is an explanatory diagram of a waveguide.

FIG. 8 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1 Corrugated pipe 13 Corrugator 15 Winder 16 Endless track type take-up machine 29 Take-up force control means F Tension

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takuma Takai 8 Nishinomachi, Higashimukaijima, Amagasaki City, Hyogo Prefecture Mitsubishi Electric Wire & Cable Co., Ltd. (72) Inventor Makoto Sadomoto 4-3 Ikejiri, Itami City, Hyogo Prefecture Mitsubishi Electric Wire Industry Co., Ltd. Itami Works (72) Inventor Kaneharu Suga 4-3 Ikejiri, Itami City, Hyogo Prefecture Mitsubishi Electric Wire Works Co., Ltd. Itami Works

Claims (2)

[Claims] 1. An endless track type take-up machine is interposed between a corrugator for corrugating a pipe and a winder for winding a corrugated pipe sent from the corrugator. High frequency cable manufacturing equipment. 2. The take-up force control means is attached to the endless track type take-off machine so as to enable control to apply a constant tension to the corrugated pipe sent from the corrugator. High frequency cable manufacturing equipment.