JPH02238413A - Production of optical cable - Google Patents

Abstract

PURPOSE:To prevent the damage of groove walls and projections and to bring the inverting parts of the grooves always in home positions in an aggregating part by forming the projections in such a manner that the projections can be rotated in a state of housing optical fibers into the grooves. CONSTITUTION:The number of the projections 54 is set at, for example, 3 pieces and the respective projections 54 are formed to a round bar shape and are so formed that the projections can be freely rotated by means of bearings 56. A delivery 14 of slots 10 is made rotatable by a prescribed angle around the axis of the slots 10 by a rotating means 15. The twist of the slots 10 is detected by the torque applied on, for example, the projections 54. The pattern of the torque applied on the projections 54 changes when there is the twist in the slots 10 near a twisting means 50. A rotating means 15 is rotated by the prescribed angle in the prescribed direction in such a man ner as to always obtain the normal pattern of the torque applied on the projections 54 by a controller 60, by which the twist of the slots 10 is corrected. The damage of the projections 54 and the groove side walls of the slots is eliminated in this way and the inverting parts of the grooves 12 are always brought to the home positions in the aggregating part. The aggregation of the optical fibers 20 is thus stably execut ed.

Description

[Detailed Description of the Invention] [Industrial Field] This invention relates to a method for manufacturing an optical cable using a throat having an SZ spiral groove, and particularly to a method for storing an optical fiber in an SZ slot. It is. [Conventional technology and problems to be solved f! ] The following methods have been devised for storing optical fibers in SZ slots. (1) In the case of Fig. 2, method 2: The slot 10 having the SZ spiral groove 12 is continuously fed out in the direction of the arrow. The sending device 2 of the optical fiber 20 is aligned with the SZ of the groove 12.
The optical fiber 20 is housed in the groove 12 while being alternately reversed as shown by the arrow 24.・Lesson B: It is extremely difficult to implement in cases of low pitch, large reversal angle, and multiple cores. (2) In the case of Fig. 3 ● Method: Without rotating the feeder 22, only the dividing plates 40 are alternately reversed in the direction of the arrow 42.・Problem: The tension of the optical fiber becomes unstable. (3) In the case of Fig. 4, the fist method: Sending machine 22. Do not rotate the dividing plate 40 either. Instead, a twisting means 50 is used. The twisting means 50 is, for example, a projection 54 protruding from the inner surface of a cylindrical main body 52 inserted into the groove 12 of the slot 10. If this twisting means 50 is fixed, the progressing slow 7
The grip 10 is twisted according to the SZ of the groove 12. As a result, the optical fiber 20 is housed in the groove 12 at a constant position in the circumferential direction on the inner surface of the collecting mouthpiece 30. This method is the most stable among the methods described above. However, there are problems with the following points. - Issues: - The protrusion 54 may damage the groove wall of the groove 12. ■If the force of twisting the slot 10 becomes large, the protrusion 54 will be damaged. ■When manufacturing the slot 10, if it is twisted in the longitudinal direction, the inverted part of the groove 12 will not always be in the fixed position at the gathering part.
It becomes difficult to implement. This invention is based on the method (3) above, which allows the most stable collection, and also solves the problems. [Means for solving the problem] Section 1a. As shown in FIG. 1b, (1) the protrusion 54 is made rotatable; (2) the twist of the slot 10 is detected; based on the detection result, the delivery side or the winding side of the slot 10 is 10
The twist of the slot 10 is corrected by rotating it around the axis of the slot 10. [Example] [1] Configuration (Figs. 1a and 1b) The cross section B of the twisting means 50 in Fig. 1a is enlarged to show the first
Shown in Figure b. - The number of protrusions 54 is, for example, 3, and 12 from each other.
Set at 0 degree intervals. By providing a plurality of protrusions 54 in this manner, the force applied to the protrusions 54 is dispersed, and damage to the protrusions 54 can be prevented. Further, each protrusion 54 is made into a round bar shape, and is rotatable by a bearing 56. Further, the delivery l4 of the slot 10 is made rotatable by a predetermined angle around the axis of the slot 10 by the 1,000-stage rotation l5 (or the winding 16 is rotated by the 1,000-stage rotation l7). Twisting of the slot 10 is detected, for example, by the torque applied to the protrusion 54. That is, if the slot 10 is not twisted, the torque applied to the protrusion 54 always follows the same pattern (normal pattern).
It changes with . However, if the slot 10 is twisted near the twisting means 50, the pattern of torque applied to the protrusion 54 changes. Therefore, the control device 60 rotates the rotary stage 15 (or the rotating means 17) by a predetermined angle in a predetermined direction so that the pattern of torque applied to the protrusion 54 always becomes a normal pattern. Correct the twist. By doing this, the inverted portion of the groove 12 will always be in a fixed position at the gathering portion. [Effects of the Invention 1 (1) Since the protrusion 54 is rotatable, damage to the side wall of the slot groove caused by the protrusion 54 can be eliminated. (2) Detecting the twist of the slot 10; Based on the detection result, rotating the sending side or the winding side of the slot 10 around the axis of the slot 10; correcting the twist of the slot 10; , kW 1 2 is always in a fixed position at the gathering part, and the optical fibers are assembled stably.

[Brief explanation of drawings]

Figure 1a is an explanatory diagram of an embodiment of the present invention, Figure t5lb is an enlarged explanatory diagram of cross section B in Figure 1a, and Figures 2, 3, and 4 are explanatory diagrams of different prior art. 16: Volume 1 fall 22: Sending machine 40: Segment plate 52: Wooden body 56 2 bearings 20: Optical fiber 30 2 sets of caps 50; Twisting means 54: Protrusion 60: Control device

Claims (2)

[Claims] (1) The slot 10 having the SZ spiral groove 12 is continuously fed out, and the slot 10 is twisted by the twisting means 50 having a protrusion 54 inserted into the groove 12; An optical cable manufacturing method comprising the step of accommodating the optical fiber 20 in the groove 12 at a constant position in the circumferential direction, wherein the protrusion 54 is rotatable. (2) The slot 10 having the SZ spiral groove 12 is continuously fed out, and the slot 10 is twisted by the twisting means 50 having a protrusion 54 inserted into the groove 12; Detecting twist of the slot 10 near a gathering point of the optical fibers; Based on the result, the sending side or the winding side of the slot 10 is rotated around the axis of the slot 10; and the twist of the slot 10 is corrected.