JPH10115740A - Method for printing extra-length containing self-support type cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely give a print to the cable main body part of the extra-length containing self-support type cable which meanders about a support wire part. SOLUTION: The extra-length containing self-support type cable 11 whose cable main body part 5 meanders is manufactured and when a print is given to the cable main body part 5 of the extra-length containing self-support type cable 11, a guide pulley 13 which curves the cable main body part 5 to a radius of curvature that is the extra length larger than the support wire part 9 is provided on the travel path of the extra-length containing self-support type cable 11. Then while the extra-length containing self-support type cable 1 is passing by the guide pulley 13, a printer 23 gives the print to the cable main body part 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of printing the type of a cable, the name of a manufacturing company, and the like on a cable main body of a self-supporting cable with extra length.

[0002]

2. Description of the Related Art As shown in FIG. 5, a self-supporting cable with extra length includes a cable main body 5 having a cable core 1 provided with a sheath 3a and a supporting wire 7 such as a steel stranded wire having a sheath 3b.
And a sheath connecting portion 3c for connecting the two sheaths 3a and 3b, and the cable main body 5 is meandering with respect to the supporting wire portion 9.

When the optical fiber cable is formed into a self-supporting type cable, if the cable core including the optical fiber has the same length as the support line, the same amount of elongation occurs in the support line and the cable core due to tension when the cable is installed. Occurs,
There is a possibility that transmission loss may increase or breakage may occur in the optical fiber in the cable core. Figure 5 Self-supporting cable
In the case of the "with extra length" as described above, even if tension is applied to the support wire 7 when the cable is erected, almost no tension is applied to the cable core 1, so that the above problem can be solved.

A self-supporting cable with extra length is manufactured by the following method. First, the cable core and the support wire are introduced in parallel into the extruder, and the outer periphery thereof is extruded and covered with a gourd-shaped sheath. Thereafter, the cable main body in which the sheath is applied to the cable core and the support wire in which the sheath is applied to the support wire are wound around a roll so that the former has a higher running speed than the latter, and is pulled out. At this time, cooling is performed to solidify the sheath. Thereafter, the support wire portion is taken out so as to be straight. This makes it possible to manufacture a self-supporting cable with a surplus length in which the cable main body meanders relative to the support wire portion by an amount longer than the support wire portion (JP-A-8-75969, JP-A-8-86944).
No.).

[0005]

By the way, it is necessary to print the type and the name of the manufacturer on the cable. In the case of a self-supporting cable, this printing is generally performed on the side surface of the cable body. However, in the case of a self-supporting cable with extra length, it is difficult to print on the surface of the cable body because the cable body is meandering.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of printing a self-supporting cable with extra length, which can reliably print on a cable main body in view of such problems.

[0007]

One solution according to the present invention is to connect a cable body having a cable core with a sheath, a support wire having a support wire with a sheath, and the two sheaths. When manufacturing a self-supporting cable having a surplus length in which the cable main body is meandering with respect to the support wire portion having a sheath connection portion, and performing printing on the cable main body portion of the self-supporting cable including the surplus length. On the running path of the self-supporting cable with extra length, a guide is provided to bend the cable main body with a radius of curvature larger than that of the support wire portion by the extra length, and the self-supporting cable with extra length passes through this guide. The printing is performed on the cable main body when it is in operation.

Another solution according to the present invention is to feed a cable core and a support wire in parallel, extrude and coat a gourd-shaped sheath on the outer periphery of the cable core, and then provide a cable body with a sheath provided on the cable core. The support wire with a sheath applied to the support wire is wound around a roll so that the former has a higher running speed than the latter, and is pulled out. In the process of manufacturing a self-supporting cable in which the main body part is meandering with respect to the support wire part, when the cable main body part is passing through the roll or when passing between the extruder crosshead and the roll. The printing is performed on the cable main body.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show a first embodiment of the present invention. In this embodiment, printing is performed after the extra-length self-supporting cable is completed, that is, at the final stage of the production line.

In this method, first, a self-supporting cable 11 having a surplus length in which the cable body 5 is meandering with respect to the support wire 9 is manufactured. This extra-length self-supporting cable 1
A guide pulley 13 for bending the extra-length self-supporting cable 11 is provided on the traveling path of the extra-length self-supporting cable 11 in order to perform printing on the first cable main body 5.

The guide pulley 13 has, as shown in FIG. 2, a first groove 15 in which the cable main body 5 enters and a second groove 17 in which the support wire 9 enters. The distance between the center of the guide pulley 13 and the center of the cable main body 5 entering the first groove 15 (the radius of curvature of the cable main body 5) is larger than that of the first groove 15 and the second groove 17 in the guide. The distance between the center of the pulley 13 and the center of the support wire 9 in the second groove 17 (the radius of curvature of the support wire 9), that is, the cable main body 5 is extended by the length of the support wire. It is formed so as to be curved with a radius of curvature larger than 9. Pressing rolls 19 and 21 for pressing the support wire portion 9 into the second groove 17 are provided on the entrance side and the exit side of the guide pulley 13. Pressing roll 19,
Along with 21, a pressing roll for pressing the cable main body 5 into the first groove 15 can be provided.

Thus, the self-supporting cable 1 with extra length is provided.
When the cable 1 passes through the guide pulley 13, the cable main body 5 is bent by a surplus length with a larger radius of curvature than the support wire 9. As a result, the meandering of the cable body 5 is removed, and the cable body 5 is
3 will pass a certain distance from the center. Therefore, if the ink jet printing machine 23 is installed toward the cable main body 5 passing through the guide pulley 13, the distance between the printing machine 23 and the cable main body 5 does not change. Printing can be performed. As the printing machine, a transfer type one can be used instead of an ink jet type.

FIG. 3 shows a second embodiment of the present invention. This embodiment differs from the first embodiment in that a number of small guide rolls 25 are used in place of the guide pulleys, and that a roll transfer printing press 27 is used in place of the ink jet printing press. . The other parts are the same as those of the first embodiment, and the same parts are denoted by the same reference numerals and description thereof will be omitted.

FIG. 4 shows a third embodiment of the present invention. In this embodiment, printing is performed in the process of manufacturing a self-supporting cable with extra length. The extra-length self-supporting cable 11 is manufactured as follows. First, the cable core 1 and the support wire 7 are sent in parallel to the crosshead 29a of the extruder 29, and the outer periphery thereof is extrusion-coated with a gourd-shaped sheath. The cable core 1 is provided with a sheath 3a to form a cable main body 5, and the support wire 7 is
b is applied to become the support wire portion 9. The sheaths 3a and 3b are connected by a sheath connecting portion 3c as shown in FIG.

The cable body 5 and the support wire 9 are wound around a roll 31 before the sheath is hardened,
1 and is cooled with water or the like. A groove is formed on the outer peripheral surface of the roll 31 so that the winding radius of the cable body 5 is larger than the winding radius of the support wire 9. Therefore, when the roll 31 is rotated to pick up the cable body 5 and the support wire 9, the cable body 5 has a higher take-up speed. That is, the speed of the cable main body 5 and the support wire 9 coming out of the crosshead 29a is higher in the cable main body 5 than in the cross head 29a.

The cable main body 5 and the support wire 9 are roll 3
After approximately one round with the support wire 1, the support wire 9 is taken so as to be straight. The length of the cable main body 5 when it is wound around the roll 31 is longer than that of the support wire 9, so that when the support wire 9 is straight, the cable main body 5 meanders by the extra length. .

In this embodiment, in the process of manufacturing the self-supporting cable 11 with extra length as described above, the ink jet printing machine 23 is installed toward the cable main body 5 passing through the roll 31. The printing on the cable main body 5 is performed by this. When the cable main body 5 passes through the roll 31, the cable main body 5 has not yet meandered, so that clear printing can be performed on the cable main body 5 reliably.

The printing machine may be of a transfer type instead of an ink jet type. The printing position is the crosshead 29a of the extruder and the roll 31.
May be the position of arrow P, for example. Since the cable body 5 does not meander even at this position, clear printing can be performed. In addition, slits may be provided at predetermined intervals in the sheath connecting portion (3c in FIG. 5) of the self-supporting cable with extra length.

[0019]

As described above, according to the present invention, printing can be reliably performed on the cable main body of the self-supporting cable with extra length.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a plan view showing a second embodiment of the present invention.

FIG. 4 is a plan view showing a third embodiment of the present invention.

FIG. 5 is a plan view of a self-supporting cable with extra length.

[Explanation of symbols]

 1: Cable core 3a, 3b: Sheath 3c: Sheath connection part 5: Cable main body part 7: Support wire 9: Support wire part 11: Self-supporting cable with extra length 13: Guide pulley 23: Ink jet printer 25: Guide Roll 27: Transfer printing machine 31: Roll

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hideyuki Iwata 3-19-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation

Claims (2)

[Claims] A cable body having a cable core provided with a sheath, a support wire having a support wire provided with a sheath, and a sheath connecting portion connecting the two sheaths, wherein the cable body is supported. When manufacturing a self-supporting cable with extra length meandering to the wire part and printing on the cable body of the self-supporting cable with extra length, on the running path of the self-supporting cable with extra length, A guide that curves the cable main body with a radius of curvature larger than the support line by the extra length is provided, and printing is performed on the cable main body when the extra-length self-supporting cable passes through this guide. Printing method of self-supporting cable with extra length. 2. A cable core and a support wire are sent out in parallel,
After extruding a gourd-shaped sheath on the outer periphery of the cable, the cable body with the sheath applied to the cable core and the support wire with the sheath applied to the support wire are connected to the traveling speed faster than the latter. In the process of manufacturing a self-supporting cable with extra length in which the cable body meanders with respect to the support wire portion, by winding the wire around a roll so as to be higher, and then taking the support wire portion straight, A method for printing a self-supporting cable with extra length, wherein printing is performed on the cable body when the cable body is passing through a roll or between an extruder crosshead and a roll.