JP2002214495A - Control method for twist back of coated optical fiber ribbon in light assembler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely insert a coated optical fiber ribbon into a groove of a grooved rod by giving twist back to the optical fiber coated ribbon. SOLUTION: In an assembly method in which a plurality of coated optical fiber ribbons 3 inserted from an upside into the respective grooves 2 of a traveling SZ-grooved rod 1 while the twist back is given, the control method for twist back of the coated optical fiber ribbon in a light assembler is characterized in that the wire dividing plate of the coated optical fiber ribbon 3 is forwardly and reversibly rotated while it is tracer-controlled in accordance with the phase change of the groove 2, and rotation following a direction and an angle which are calculated from data such as the travel speed of the SZ-grooved rod 1, the phase change of the groove 2, the average shape of the groove 2, a twist back rate and a desired twist back pattern which is previously generated, is given to the coated optical fiber ribbon 3 at desired time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the twisting of a tape core in an optical assembly machine,
The present invention relates to a method for controlling the twisting applied to a tape core when a tape core is dropped into the groove while the rod with a Z groove is running and inserted.

[0002]

2. Description of the Related Art A conventional twisting control method will be described with reference to FIGS. Hereinafter, one example of the apparatus will be described. The SZ grooved rod 1 is sent from the left to the right in FIG. 5, and is provided with a fixed splitting plate 12 for arranging the tape core wires 3 isometrically and a twisted splitting plate 4 in order from the upstream side. Subsequently, the collecting branch plate 8 is disposed immediately upstream of the collecting die 9.

[0003] The collecting branch plate 8 is rotatably supported so as to be rotatable around the SZ-grooved rod 1 passing through the center thereof, and a claw (not shown) projecting from the inner peripheral portion.
Engages with the SZ groove 2 of the SZ grooved rod 1, and repeats left and right rotations in the shape of the SZ groove 2 as the SZ grooved rod 1 travels.

[0004] A gear 81 is mounted on the outer peripheral portion of the collecting and dividing plate 8, and a spur gear 82 meshes with the gear 81.
The two axes are directly connected to an angle detector 11 such as a rotary encoder or a potentiometer. In this manner, the magnitude of the rotation direction and the rotation angle of the assembly branch plate 8 are constantly measured.

[0005] A twisted branch plate 4 is provided on the upstream side of the collective branch plate 8 as appropriate. Near the outer peripheral portion, circumferentially equally divided, there are provided rotatable core wire guide cylinders 5 each having a number of tape core wires 3 to be inserted, each having a generally hollow cylindrical shape.

At the entrance of the core guide tube 5, a tape core 3 is provided.
A plurality of branching pins are provided in the diametrical direction for branching, and after passing therethrough, they are combined into one. For this reason, the tape core wire 3 can run through the core wire guide tube 5, but there is no relative rotation between the two. That is, the angular phase of the tape core wire 3 around its own axis can be changed as desired (that is, twisted) by rotating the core wire guide tube 5.

In the apparatus shown in the figure, the mechanism for rotating the core guide tube 5 is a planetary gear mechanism. That is, the core wire guide tube 5
The gears provided on the outer peripheral portion of the
A sun gear 7 fixed independently to the inner peripheral portion of the twisted distribution plate 4 meshes with the sun gear 7, and the twisted distribution plate 4 is rotated by the drive motor 10 and the outer peripheral gear 41. It is configured to be rotated in the opposite direction as it is rotated by the gear train 42.

The center of the sun gear 7 is, of course, provided with a center hole through which the rod 1 with the SZ groove passes, and the ratio of the number of teeth to the planetary gear is appropriately set so as to obtain a desired twisting ratio. Is done.

[0009]

The above-mentioned conventional method for controlling the twisting of the ribbon has the disadvantage that the twisting amount becomes non-uniform due to the twisting of the groove and the response error of the detector (especially at high speeds). However, there is also an inconvenience that the command of the twisting operation is impossible with a pattern other than the shape of the groove, and the twisting operation is always performed in synchronization with the movement of the groove, and selection other than this is impossible. .

[0010]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the invention according to the first aspect of the present invention is a method for manufacturing a rod having a traveling SZ groove. A method of dropping and inserting a plurality of tape cores while twisting them, wherein the tape core is rotated forward / reverse while controlling the distribution plate according to a phase change of the groove, and In accordance with the line, the running speed of the rod with the SZ groove, the phase change of the groove, the average shape of the groove, the twisting rate, and the direction and angle calculated from data such as a desired twisting pattern created in advance. This is a method for controlling the twisting of a core fiber in an optical assembler, wherein rotation is given at a desired time.

[0011]

FIG. 1 shows an example of an apparatus for carrying out the method of the present invention. The method of the present invention will be described with reference to FIG. The major difference compared with FIG. 5 showing a conventional apparatus example is that a core guide tube 5 for giving a twist to the tape core wire 3 is provided on a twisted distribution plate 14, and the twisted distribution plate 14 is Instead of being controlled as the grooved rod 1 travels as in the prior art, the central processing unit 1
9 to be driven to rotate.

This is to eliminate the influence of "twist" and "pitch deviation" existing somewhere in the longitudinal direction of the grooved rod 1. That is, the twisted distribution plate 14 is an average value of one pitch of the SZ portion of the grooved rod 1 to be used, that is, S
It advances from the start point of the section to the Z section, and is rotated by the drive motor 17 corresponding to the value obtained by averaging the length of one pitch up to the start point of the next S section over the entire rod length. .

Thus, the amount of rotation of the twisted distribution board 14 is determined by an angle corresponding to the standard corresponding to the S or Z winding of the groove 2 of the grooved rod 1 to be used, for example, θ = 270 ° or 3 °.
00 ° is selected, and exactly half of it, that is, θ / 2
The rotation is controlled so as to rotate forward and backward, respectively.

Here, it should be emphasized that the start of the twisting rotation does not correspond to the reversal point of the SZ portion of the groove as in the prior art, but any point, for example, the point A of the S portion as shown in FIG. It is also possible to take. In this case, the twisting rotation in the same direction is continued up to the point B in the Z section, and A
The length between B is defined as p / 2, where p is the average pitch described above. Then, at the point B, the rotation direction of the twisting is reversed.

In the present invention, the traveling speed of the grooved rod 1 is also taken into consideration. As shown in FIG. 3, when the running speed of the grooved rod 1 is too high as compared to the rotation speed for twisting, the twisting given to the tape core wire 3 is performed up to a point R of a desired twisting rate. This is to prevent the running length c from reaching the maximum value to increase, and to shorten the section having the desired twisting rate.

The traveling speed data of the grooved rod 1 is input from the take-up device 13 to the central processing unit 19, from which it is instructed to the sun gear drive motor 18 which gives the core wire guide tube 5 a twisting rotation.

FIG. 4 shows types of twisted patterns. In the case of the conventional profile control method, there is no such a voluntary twisting pattern selection, and the pattern is naturally symmetrical. In the method of the present invention, this twist pattern is also entered into the central processing unit 19 and commanded from there.

To explain supplementarily with the apparatus shown in FIG. 1, only the passage hole 15A for the tape core wire 3 is formed at a position corresponding to the branch plate 15 closest to the collecting die 9. This dividing plate 15
Is controlled in accordance with the running of the grooved rod 1 in the shape of the groove, while the twisted distribution plate 14 is controlled independently as described above, but both of them rotate at substantially the same rotation. It is expected to do.

However, since the twisted splitting plate 14 is independently controlled in rotation, a torsion error or the like accumulates with the passage of time, and a considerable angular discrepancy with the splitting plate 15 may occur. . However, this means that the two
By increasing the distance between the two to some extent, practical harm in operation can be eliminated.

In the apparatus shown in FIG. 1, a groove phase detector for controlling the distribution plate 15 and a detector for inputting data for controlling the drive of the twisted distribution plate 14 are commonly used. However, apart from the latter, it may be provided, for example, at a close position before or after the twisted distribution plate 14.

[0021]

According to the present invention, since the rotation of the splitting plate for applying the twisting is not based on the control of the shape of the groove of the grooved rod, the torsion of the groove and the response error of the detector (especially at high speeds) ) Prevents the amount of twisting from becoming non-uniform, furthermore, it is possible to issue a twisting operation command using a pattern other than the shape of the groove, and to perform control taking into account the traveling speed of the grooved rod. Can prevent the situation where the length of the twisting ratio portion is too short, and it is possible to reliably drop the tape core wire into the SZ grooved rod.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an example of an apparatus for performing a method of the present invention.

FIG. 2 is a simplified diagram illustrating that a twisting start position is arbitrarily selected.

FIG. 3 is a simplified diagram showing a relationship between a traveling speed of a grooved rod and a length of a portion having a desired twisting ratio.

FIG. 4 is a simplified diagram showing an example of a twisted pattern.

FIG. 5 is a side sectional view showing an example of an optical assembler for implementing the conventional method.

FIG. 6 is a cross-sectional view of a portion of the twisted split plate of FIG. 5;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 grooved rod 2 groove 3 tape core wire 4 twisted split plate 5 core wire guide tube 9 assembly die 13 take-off device 14 split plate 16 split plate drive motor 18 sun gear drive motor 19 central processing unit

Claims (1)

[Claims] 1. A method of assembling, wherein a plurality of tape cores (3) are dropped and inserted into each groove (2) of a running SZ-grooved rod (1) while being twisted. The branching plate of (3) is rotated forward and backward while controlling according to the phase change of the groove (2), and the running speed of the rod (1) with the SZ groove is added to the tape core wire (3). The rotation according to the direction and angle calculated from the phase change of the groove (2), the average shape of the groove (2), the twisting rate, and the data of the desired twisting pattern created in advance is performed at a desired time. A method for controlling the twisting of a tape core in an optical assembly machine, characterized in that: