JPS63244010A - Production of optical fiber cable with surplus length - Google Patents

Abstract

PURPOSE:To permit safe and sure fixing of slack parts in an SZ twisted state to a tensile body by integrally fixing the contact part of the central part of the SZ twist slack forming part and the tensile body while forming the SZ twist slacks twisted to a periodically inverting spiral shape to the tensile body fixed at specified intervals. CONSTITUTION:The tensile body 8 and an optical fiber cable 9 are integrally fixed by a fixing device 1 and thereafter, the body and cable are taken off for a specified length by a take-off 6. After the slack is provided in the cable 9 by a slackening device 2, the cable is integrally fixed to the body 8. The SZ twist is then formed to the slack provided in the cable 9 by a SZ twisting device 4 which twists the cable to the periodically inverting spiral shape. The contact part of the central part of the SZ twist forming part of the cable 9 provided with the SZ twist slack and the tensile body is fixed by a formed part fixing device 5. The slack parts as a surplus length are thereby formed to the SZ twist to the SZ twist shape having the SZ twist with respect to the tensile body while the cable is fixed integrally to the tensile body while the cable is fixed integrally to the tensile body at the specified intervals in a series of production stages and, therefore, sufficient twists can be provided the cable.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides an optical fiber cable with an extra length, which is particularly suitable for later branching, and is fixed together with a tensile strength member while continuously giving slack to the optical fiber cable. Regarding the manufacturing method, in detail, while forming an Sz twisted slack in an optical fiber cable by twisting it in a spiral shape that reverses periodically on a tensile strength body fixed at regular intervals, the central part of the Sz twisted slack forming part and the tensile strength body are This relates to a new molding method that collectively fixes the contact parts of the

[Conventional technology]

Conventionally, there has been no technology relating to a method of continuously manufacturing an optical fiber cable with extra length while adding slack to this type of optical fiber cable at regular intervals and fixing the cable all at once to a tensile strength member.

[Problem that the invention seeks to solve]

Conventionally, there was no way to manufacture optical fiber cables with a certain amount of slack at regular intervals in this type of tensile strength body.・When branching is required, this has been done by cutting the optical fiber cable at the necessary point and performing connection/branching work, which inevitably makes the work difficult and inefficient, especially at sites where the cable has already been installed. There is also the problem that it is difficult to establish a stable and reliable connection.

c) Means for Solving Problems] In order to solve the problems of the conventional art, the present invention provides a method in which an optical fiber cable is fed in the longitudinal direction along a tensile strength member while being slackened, and is taken up and wound together with the tensile strength member. This is a new manufacturing method for optical fiber cable with a tensile strength body, and the process of adding slack to the optical fiber cable involves fixing the tensile strength body and optical fiber cable together with a fixing device, and then pulling the optical fiber cable to a certain length using a pulling machine. After applying slack using a slackening device, the cable is fixed all at once to a tensile strength member, and then attached to an optical fiber cable and subjected to υS twisting using an SZ twisting device that twists the cable in a spiral pattern that rotates periodically. The present invention is characterized in that the process of fixing the central part of the slack forming part 5zi1a, 6 of the optical fiber cable with the slack of the Sz twist and the contact part of the tensile strength body by a forming part fixing device is continuously repeated.

[For production]

The present invention involves attaching slack to an optical fiber cable at regular intervals and fixing it to a tensile strength body in a series of manufacturing steps.
An optical fiber cable processing process in which the slack part of the optical fiber cable is SZ-twisted into a tensile strength body by an SZ twisting device, and the central part of the SZ twisting slack forming part and the contact part of the tensile strength body are fixed by a forming part fixing device. Due to this manufacturing method, the optical fiber cable can be fixed all at once to the tensile strength member with a certain amount of slack at regular intervals, and the slack portion of the optical fiber cable can be fixed stably and reliably to the tensile strength member with the S-twisted state. Can be fixed. Examples will be described below based on the drawings.

〔Example〕

FIG. 1 is a diagram showing a process outline of an embodiment of the manufacturing method of the present invention. Reference numeral 1 denotes a fixing device that fixes the tensile strength member 8 and the optical fiber cable 9 all at once, and continuously fixes the tensile strength member 8 and the optical fiber cable 9 sent in at regular intervals. Reference numeral 2 denotes a slackening device that takes up the slack in the optical fiber cable 9 in the longitudinal direction, and reference numeral 3 denotes a wire holding device that prevents the optical fiber cable 9 from bending even after reducing the slack. Further, 4 is an SZ twisting device that rotates the slack of the optical fiber cable 9 into an SZ twist, and 5 is an SZ twisting device.
The central part of the part where the optical fiber cable 9 is twisted around the tensile strength member 8, that is, the part that contacts the tensile strength member at the position where the twist is reversed, is bonded using, for example, a tape fusion method.
A is a molded part fixing device that fixes by adhesive method or the like. S
The Z-twisting device 4 and the forming part fixing device 5 are operated mutually and reciprocally.

Reference numeral 6 denotes a take-up machine that continuously takes over the fixed optical fiber cable 9 and the tensile strength body 8, and 7 denotes a winding machine that winds the taken-off optical fiber cable with the tensile strength body onto a drum or the like. .

By setting the tensile strength member 8 and the optical fiber cable 9 in a series of equipment whose configuration is illustrated in FIG. 1, and operating it,
Fixed device! In this case, the tensile strength member 8 and the optical fiber cable 9 are fixed together at regular intervals, but after fixing in one place, the pulling machine 6f is operated and moved by a predetermined length, and then only the optical fiber cable 9 is slackened. The attachment device 2 takes up the slack and fixes the second part all at once. At the same time as fixing the third point all at once, the tensile strength member 8 and the slackened optical fiber cable are held down using the wire holding device 3, and the optical 7-IPA cable 9 is twisted in an 8Z shape around the outer periphery of the tensile strength member 8 using the SZ twisting device 4.
The central part of the Sz twist of the tensile strength body 8 and the optical fiber cape/I/9, that is, the contact area between the tensile strength body 8 and the tensile strength body 8 in which the twisting direction is reversed, is fixed by a molded part fixing device 5, for example, by a tape fusion method or continuously. Repeat.

FIG. 2 shows the main structure of an optical 7-iper cable manufactured in one cycle of the process of adding Sz twist slack to the optical fiber cable 9 of the present invention. The same reference numerals as in FIG. 1 indicate the same parts. 10 is a molded part fixing part, 11 is a tensile strength member/light 7
The Aipakable collective fixing part is shown.

〔Effect of the invention〕

As explained above, the present invention involves fixing the tensile strength member and the optical fiber cable together at regular intervals in a series of manufacturing processes, and then applying SZ twisting to the slack portion of the optical fiber cable as an extra length to the tensile strength member. Since it can be formed into an SZ twisted shape, sufficient twisting can be achieved, and post-branching can be performed easily and stably, which is highly effective.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an embodiment of the manufacturing method of the present invention, and FIG. 2 is a diagram showing the configuration of the main parts of an optical fiber cable manufactured by the present invention. 1... Fixing device 2... Sagging device 3... Line pressing device 4... SZ twisting device 5... Molding part fixing device 6... Take-up machine 7... Winding machine 8... ... Tensile strength member 9 ... Optical fiber cable 10 ... Molded part fixing part

Claims (1)

[Scope of Claims] A method for manufacturing an optical fiber cable with a tensile strength body, wherein the optical fiber cable is sent out in the longitudinal direction along a tensile strength body while being slackened, and is taken up and wound together with the tensile strength body, the optical fiber cable as described above. The step of adding slack to the optical fiber cable includes fixing the tensile strength member and the optical fiber cable all at once using a fixing device, and then taking them off for a certain length using a pulling machine.After adding slack only to the optical fiber cable using the slack adding device, the tensile strength member The optical fiber cable is fixed in bulk, and the slack attached to the optical fiber cable is subjected to SZ twisting using an SZ twisting device that twists the cable in a spiral shape that is periodically reversed.
A method for manufacturing an optical fiber cable with extra length, comprising continuously repeating a step of fixing the central part of the twisted slack forming part and the contact part of the tensile strength body using a forming part fixing device.