JPH10333003A - Manufacturing equipment for overhead optical cables - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a self-supporting type overhead optical cable manufacturing apparatus including an optical cable, a support wire, and a connecting portion for integrating the optical cable and a moderate slack (excess length) in the optical cable. An object of the present invention is to provide an aerial optical cable manufacturing apparatus capable of obtaining a stable quality of an aerial optical cable regardless of changes in conditions. SOLUTION: Each of a primary cooling device and a secondary cooling device is provided with a mechanism capable of changing the length of the intermediate product N in the traveling direction. In addition, a mechanism is provided in the extra length providing device so that the distance from the primary cooling device can be changed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a self-supporting overhead optical cable in which a support wire and an optical cable are connected and integrated at a connecting portion, and the optical cable has a slack (excess length). The present invention relates to an apparatus for manufacturing an overhead optical cable capable of obtaining a product of stable quality regardless of a change in manufacturing conditions.

[0002]

2. Description of the Related Art The applicant of the present invention has previously proposed Japanese Patent Application No. Hei 8-10436 for an aerial optical cable and its manufacturing method. FIG. 4 shows an example of an overhead optical cable proposed in the prior invention. This overhead optical cable is roughly composed of a support wire 11, a connecting portion 12, and an optical cable 13. The support wire 11 includes a support wire main body 14 made of a galvanized steel twisted wire or the like, and a covering 15 made of a synthetic resin such as polyethylene which covers the support wire main body 14.

[0003] The connecting portion 12 is composed of a support wire 11 and an optical cable 1.
3 is used to suspend the optical cable 13 with the support wire 11 and to hang down from the bottom of the support wire 11 and extend to the top of the optical cable 13 and have a continuous thickness of about 1 to 4 mm. And made of a synthetic resin such as polyethylene. Optical cable 1
Reference numeral 3 denotes an optical cable core 16 containing a large number of optical fiber cores, and a sheath 17 made of a synthetic resin such as polyethylene and covering the optical cable core 16.

The connecting portion 12 has a support wire 11
Multiplicity of separation parts 18, 18 intermittently cut out along
... are formed. The length of the separation part 18 is, for example, 5
The distance between the adjacent separating portions 18 is, for example, about 5 cm. The length and interval of the separation part 18 can be arbitrarily changed.

[0005] Further, the separation portions 18, 1
At the formation position of 8, the optical cable 13 has a slack, and the slack is formed on the side of the support wire 11 by changing the direction substantially alternately. In other words, the optical cable 13 is meandering in the left-right direction with respect to the linear support line 11.
It has an extra length (sag) of about 0.7%. With this structure, the overhead optical cable does not apply or reduces a tensile force or distortion due to the tensile force on the optical cable 13.

Next, an apparatus for manufacturing such an overhead cable will be described. FIG. 5 shows an example of an apparatus for manufacturing an overhead optical cable according to the present invention. In the figure, reference numeral 21 denotes a cross-head die for extrusion coating attached to an extruder. The optical cable core 16 and the support wire main body 14 are simultaneously fed into the crosshead die 21 from an inlet hole of the mandrel, and a molten resin such as polyethylene is supplied from an extruder (not shown).
An intermediate product N in which the resin is coated around the optical cable core 16 and the support wire main body 14 in the inside 1 and the connecting portion 12 is formed is obtained.

[0007] As shown in FIG. 6, the intermediate product N is continuously led out from the exit hole of the crosshead die 21 so that the support wire 11 is located below and the optical cable 13 is located above. The supporting wire 1 that becomes heavy in this way
1 is arranged downward, so that the weight of the connecting portion 1
2 is formed in a straight state.

[0008] A separation portion forming device 22 is provided on the exit hole side of the crosshead die. The separation portion forming device 22 has a sharp blade (not shown), and the blade is intermittently advanced or retracted toward the intermediate product N, so that the intermediate product N coming out of the crosshead die 21 is removed. While the resin constituting the connecting portion 12 is still in a semi-molten state, a linear cut is made in the resin to form the separating portions 18 intermittently. As shown in FIG. 7, the intermediate product N in which the linear separating portions 18, 18... Are intermittently formed substantially at the center of the connecting portion 12 by the separating portion forming device 22, is then sent to the primary cooling water tank 23. Here, the resin is cooled, and the resin on the surface is semi-solidified, and is sent to the extra length forming pulley 24.

The extra length forming pulley 24 has a diameter of 30 cm to 2 cm.
It is an annular thing of about 00 cm, and is designed to rotate in the direction of the arrow in the figure. The intermediate product N is wound around the extra-length forming pulley 24 over one circumference and runs in the direction of the arrow. At the time of this winding, the supporting wire 11 and the optical cable 13 come into contact with the outer peripheral surface of the extra length forming pulley 24 as shown in FIG.

Since the diameter of the optical cable 13 and the supporting wire 11 are different from each other and the diameter of the optical cable 13 is larger, the winding diameter of the optical cable 13 among the intermediate products N wound around the extra length forming pulley 24 is different. It becomes larger than the winding diameter of the support wire 11. Since the extra-length forming pulley 24 rotates at the required speed, the peripheral speed of the optical cable 13, that is, the traveling speed is higher than the traveling speed of the support wire 11. Thereby, the intermediate product N is transferred to the extra length forming pulley 2.
4, the traveling speed of the optical cable 13 becomes faster than the traveling speed of the support wire 11.

The difference between the two traveling speeds is caused when the intermediate product N moves away from the extra length forming pulley 24 when the optical cable 13
Are partially separated from the support wires 11 at the separation parts 18, 18,..., And appear as slack (excess length) at the separation parts 18, 18,. Therefore, the intermediate product N moving away from the extra-length forming pulley 24 has its optical cable 13 slackened at the positions of the separation parts 18, 18,..., And exhibits a meandering state as shown in FIG.

The intermediate product N in a meandering state is immediately sent to the secondary cooling water tank 25, where it is completely cooled.
The resin is solidified. Thus, an aerial optical cable having the appearance shown in FIG. 4 is continuously obtained, taken up by the take-up device, and then wound up appropriately by a take-up drum or the like to obtain a product.

According to such a manufacturing method, the resin coating on the optical cable core 16 and the support wire main body 14, the formation of the connecting portion 12, and the provision of the slack to the optical cable 13 are performed all at once in one manufacturing line. Thus, the intended overhead optical cable can be manufactured extremely efficiently.

When actually manufacturing an overhead optical cable, the linear velocity of the intermediate product N traveling in the manufacturing apparatus is greatly different between immediately after the start of the manufacturing and when the manufacturing is being performed smoothly. That is, immediately after the start of production, a check is performed to determine whether the obtained final product is a good product, and an operation of winding the obtained final product on a drum or the like is performed. I have to be late. Once it is confirmed that the final product obtained is good, it is important to increase the linear speed of the intermediate product N as much as possible in order to improve productivity.

However, simply increasing the linear speed of the intermediate product N may adversely affect the quality of the final product.
That is, as the linear velocity of the intermediate product N increases, the time during which the intermediate product N is cooled by the primary cooling device decreases, and the temperature of the intermediate product N at the outlet of the primary cooling device increases. As a result, before the primary cooling, the connecting portion 12
May be re-adhered due to insufficient cooling. Further, in the extra-length forming pulley 24, since the temperature of the intermediate product N is high, the connecting portions 12, 12,... Are likely to be deformed more than necessary, and the slackness of the optical cable 13 may vary. There is.

Also, depending on the type of resin used for coating the overhead optical cable, there is a possibility that the quality of the final product may be affected due to the difference in properties. That is, since the basic properties such as the softening point and the specific heat are different depending on the resin used, when the intermediate product N is cooled by the primary cooling device, the intermediate product N is cooled at the outlet of the primary cooling device even under the same cooling condition. Temperature and hardness of the resin may change. As a result, there is a possibility that the process after the next surplus length application will be adversely affected.

[0017]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an apparatus for manufacturing an overhead optical cable having a surplus length, which manufactures an overhead optical cable capable of obtaining a stable quality product irrespective of a change in manufacturing conditions. It is to provide a device.

[0018]

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical fiber cable in which a primary cooling device and a secondary cooling device are provided with a mechanism for controlling the temperature of an optical cable and a supporting wire discharged from an outlet of each device. It is solved by a manufacturing device. Further, such a problem is solved by a manufacturing apparatus for an overhead optical cable in which a surplus length provision device is provided with a moving mechanism for changing a position between a primary cooling device and a secondary cooling device.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention, wherein reference numeral 1 denotes a primary cooling water tank, reference numeral 2 denotes an extra-length forming pulley, and reference numeral 3 denotes a secondary cooling water tank. Intermediate product N
Is cooled by traveling in the primary cooling water tank 1, and travels while the support wire 11 and the optical cable 13 are in contact with the outer peripheral surface of the extra length forming pulley 2. By running in the water tank 3, it is completely cooled.

The primary cooling water tank 1 has a substantially rectangular parallelepiped shape, and the inside thereof is filled with cooling water. One side 1a of the primary cooling water tank 1 has an entrance 1b through which the intermediate product N is inserted, and a side 1c facing the side 1a.
Is provided with an outlet 1d for the intermediate product N. The cooling water is filled in the primary cooling water tank 1 to a depth at which the intermediate product N is sufficiently immersed, and therefore, the inlet 1b and the outlet 1d.
Is preferably subjected to a water leakage prevention process so that the cooling water does not leak even when the inserted intermediate product N runs. For example, a method of providing a packing made of synthetic rubber or the like so as to close the gap between the intermediate product N and the end surfaces of the entrance 1b and the exit 1d can be given.

Since the temperature of the cooling water in the primary cooling water tank 1 affects the temperature of the intermediate product N after traveling in the primary cooling water tank 1, it is preferable to maintain a constant temperature within a possible range. For example, the cooling water at a required temperature is continuously introduced into the primary cooling water tank 1, the cooling water in the water tank overflows from the upper part of the water tank, and the temperature of the cooling water is controlled by using a circulation pump and a water temperature controller. Can be mentioned. Alternatively, the temperature of the cooling water can be suppressed from increasing by increasing the volume of the primary cooling water tank as much as possible and increasing the absolute amount of the cooling water.

The temperature of the intermediate product N immediately after being discharged from the primary cooling water tank 1 has a great influence on the next extra length forming step. If the temperature of the intermediate product N is too high, that is, if the primary cooling is insufficient, the separation unit 1 formed on the connecting unit 12 is formed in the separation unit forming step which is a step preceding the primary cooling step.
Are partially or wholly re-adhered, so that the extra length cannot be added to the optical cable 13 in the extra length forming step, or the optical cable 1
There is a possibility that the extra length of 3 may be uneven. Conversely, intermediate product N
Is too low, that is, if the primary cooling is performed excessively, the intermediate product N is excessively solidified, and it may be difficult to form the extra length in the extra length forming step. If the intermediate product N is completely solidified before forming the extra length,
It is no longer possible to form extra length.

In the present embodiment, by changing the distance between the side surface 1a and the side surface 1c of the primary cooling water tank 1, the length of the intermediate product N in the primary cooling water tank 1 is changed and discharged from the primary cooling water tank 1. The temperature of the intermediate product N immediately after the control is controlled. That is, the primary cooling water tank 1 has the side surface 1a
A mechanism is provided such that the distance between the first cooling water tank 1 and the side surface 1c can be freely set, whereby the length of the intermediate product N cooled in the primary cooling water tank 1 in the running direction can be freely changed. In other words, by changing the distance between the side surface 1a and the side surface 1c of the primary cooling water tank 1 and adjusting the residence time of the intermediate product N in the primary cooling water tank 1, the intermediate product N is discharged from the outlet 1d of the primary cooling water tank 1. The temperature of the intermediate product N can be controlled.

The shorter the distance between the side surface 1a and the side surface 1c of the primary cooling water tank 1 is, the more the intermediate product N becomes.
The time spent staying inside can be shortened. That is, the temperature at which the intermediate product N is discharged from the outlet 1d of the primary cooling water tank 1 gradually increases. Conversely, the longer the distance between the side surface 1a and the side surface 1c of the primary cooling water tank 1, the lower the temperature at which the intermediate product N is discharged from the outlet of the primary cooling water tank 1.

As a water tank having such a mechanism, a water tank as shown in FIG. 2 can be exemplified. FIG. 2 (a)
FIG. 3 is a sectional view showing an example of a wall-movable water tank. Aquarium 4
, Four surfaces other than the side surface 4a are fixed, and the side surface 4a can be moved in parallel while facing the side surface 4b. That is, by moving the side surface 4a, the distance from the side surface 4b can be changed. FIG.
(B) is sectional drawing which shows an example of a wall-expandable water tank.
In the water tank 5, the three surfaces other than the side surfaces 5a and 5b are configured by alternately stacking two types of large and small U-shaped members 5c and 5d in two layers. When the two types of U-shaped members 5c, 5c, ... and 5d, 5d, ... completely overlap, the distance between the side surfaces 5a, 5b is the shortest. By gradually shifting the overlap of the two types of U-shaped members 5c, 5c, ... and 5d, 5d, ..., the distance between the side surfaces 5a, 5b can be increased.

When increasing the linear velocity of the intermediate product N, the distance between the side surface 1a and the side surface 1c of the primary cooling water tank 1 is increased in accordance with the increase in the linear velocity, so that the intermediate cooling water in the primary cooling water tank 1 is increased. The length of the product N in the traveling direction is extended.
Thereby, an increase in temperature when the intermediate product N is discharged from the outlet 1d of the primary cooling water tank 1 is suppressed, and re-adhesion of the separation parts 18, 18,... Formed on the connecting part 12 in a step before the primary cooling is prevented. At the same time, the optical cable 1
3 can be provided under suitable conditions.

In the primary cooling device 1, the intermediate product N that has been appropriately cooled is sent to the extra-length forming pulley 2. The extra length forming pulley 2 has the same configuration as the extra length forming pulley 24 shown in FIG. That is, the extra-length forming pulley 2 is an annular one having a diameter of about 30 cm to 200 cm, and is configured to rotate in the direction of the arrow in the figure. A support wire 1 is provided on the outer peripheral surface of the extra length forming pulley 2.
1 and the optical cable 13 are wound so as to be in contact with each other. The optical cable 13 having a large diameter has a higher traveling speed than the support wire 11 having a small diameter. The difference between the two traveling speeds is caused by the fact that the optical cable 13 is partially separated from the support wire 11 at the separation portions 18, 18,. 18, 18,... Appear as slack (extra length).
Therefore, the intermediate product N moving away from the extra-length forming pulley 2
The optical cable 13 is slackened at the positions of the separation parts 18, 18,..., And exhibits a meandering state as shown in FIG.

As described above, the temperature of the intermediate product N is important when the extra length is provided in the extra length forming pulley 2.
This can be adjusted by changing the length of the primary cooling water tank 1 in the running direction of the intermediate product N in the primary cooling water tank 1, but by changing the distance between the primary cooling water tank 1 and the extra-length forming pulley 2. Adjustment is also possible. That is,
When the distance between the primary cooling water tank 1 and the extra-length forming pulley 2 is reduced, the intermediate product N winds around the extra-length forming pulley 2 substantially at the temperature at the time when the primary cooling water tank 1 is discharged. When the distance between the intermediate product N and the extra-length forming pulley 2 is increased, the intermediate product N is air-cooled by the surrounding air before it reaches the extra-length forming pulley 2 after being discharged from the primary cooling water tank 1, and the temperature further decreases. This behavior appears more remarkably as the linear speed of the intermediate product N decreases.

In this embodiment, the intermediate product N runs substantially straight before and after the extra-length forming pulley 2 when viewed from the end face direction of the extra-length forming pulley 2. 2 is provided at a position where the outer peripheral surface is almost in contact with the straight line. Therefore, the extra length forming pulley 2
It is sufficient that the outer peripheral surface is on a track satisfying a state almost in contact with the traveling line of the intermediate product N and can move between the primary cooling water tank 1 and the secondary cooling water tank 3.

FIG. 3 shows an example of the moving mechanism of the extra length forming pulley 2 described above. In the figure, reference numeral 2 denotes a pulley, reference numeral 6 denotes a pedestal, and reference numeral 7 denotes a rail. The pulley 2 is rotatably mounted on a pedestal 6 via a rotation shaft 8, and is driven to rotate by rotation driving means provided in the pedestal 6. The pedestal 6 is provided so as to straddle the rail 7 and can move on the rail 7 in the direction of the arrow in the figure. That is, the rail 7 is laid beforehand at a position where the outer peripheral surface of the pulley 2 can move on a track capable of maintaining a state substantially in contact with the traveling line of the intermediate product N, and the pedestal 6 is placed on the rail 7. The outer peripheral surface of the pulley 2 that moves together with the intermediate product N is kept substantially in contact with the travel line of the intermediate product N.

Therefore, by increasing the distance between the extra length forming pulley 2 and the primary cooling water tank 1 at a high linear velocity, the temperature of the intermediate product N can be reduced before the extra length is given to the extra length forming pulley 2. Can be. Of course, of the primary cooling water tank 1,
It is more effective to use it in combination with a method of extending the length of the intermediate product N in the traveling direction.

The optical cable 13 in the extra-length forming pulley 2
The intermediate product N given the extra length is finally cooled in the secondary cooling water tank 3 to become a final product. The secondary cooling water tank 3 has a substantially rectangular parallelepiped shape,
Cooling water is full. On one side 3a of the secondary cooling water tank 3, an entrance 3b through which the intermediate product N is inserted,
The side surface 3c facing the side surface 3a has an outlet 3 for the intermediate product N.
d is provided. In the secondary cooling water tank 3, an intermediate product N
The cooling water is filled to a depth at which the cooling water is sufficiently immersed. Therefore, the inlet 3b and the outlet 3d are subjected to a water leakage preventing treatment so that the cooling water does not leak even when the intermediate product N passes therethrough. Is preferred. For example, a method of providing a packing made of synthetic rubber or the like so as to close a gap between the intermediate product N and the end surfaces of the entrance 3b and the exit 3d can be given.

[0033] The intermediate product N is discharged from the secondary cooling water tank 3 to complete all the steps and become a final product. The final product must be sufficiently cooled by the secondary cooling water tank 3 and the resin must be completely solidified. If the final product is not completely solidified, or if some load is applied to the final product, such as when winding the final product on a drum,
There is a possibility that a problem such as deformation of the connecting portion 12 may occur.

In this embodiment, by changing the distance between the side surfaces 3a and 3c of the secondary cooling water tank 3, the length of the intermediate product N in the secondary cooling water tank 3 is changed, and In 3, the intermediate product N was sufficiently cooled. That is, the side surface 3 a and the side surface 3
A mechanism is provided such that the distance between c can be freely set, whereby the length of the intermediate product N cooled in the secondary cooling water tank 3 in the traveling direction can be freely changed. In other words, the side surfaces 3a and 3c of the secondary cooling water tank 3
By varying the distance of the intermediate product N and adjusting the residence time of the intermediate product N in the secondary cooling water tank 3, the intermediate product N can be sufficiently cooled in the secondary cooling water tank 3. As a water tank having such a mechanism, a water tank as shown in FIG. 2 can be exemplified.

When increasing the linear speed of the intermediate product N, the side surfaces 3a and 3c of the secondary cooling water tank 3 are so arranged that the intermediate product N is sufficiently cooled in the secondary cooling water tank 3 in accordance with the linear speed increase.
, The time during which the intermediate product N is cooled is extended. Thereby, the final product which is sufficiently cooled in the secondary cooling water tank 3 and is completely solidified can be obtained.

The above operation, that is, the extension of the length of the primary cooling water tank 1 and the secondary cooling water tank 3 in the running direction of the intermediate product N and the change of the position of the extra-length forming pulley 2 are performed by the primary cooling water tank 1
It is preferable that the temperature of the intermediate product N immediately after being discharged from the secondary cooling water tank, the temperature of the final product immediately after being discharged from the secondary cooling water tank 3, the excess length ratio, and the like be constantly measured, and the measurement be performed based on this data. As a result, even when another coating resin is used, its properties can be easily grasped by data measurement, which leads to an improvement in productivity such as a reduction in time required for migration. Further, it is more preferable to use a computer or the like to automatically perform all or part of the above-described operations by data measurement, result analysis, and result feedback. As a result, the quality of the obtained overhead optical cable can be further stabilized, and the productivity is further improved.

[0037]

As described above, according to the present invention,
In a self-supporting aerial optical cable manufacturing equipment where the support wire and the optical cable are connected and integrated at the connection part, and the optical cable has slack (extra length), stable quality can be obtained regardless of changes in manufacturing conditions. An overhead optical cable can be obtained. The overhead optical cable manufacturing apparatus of the present invention has a mechanism for adjusting the length of the primary cooling device and the secondary cooling device in the traveling direction of the overhead optical cable. In particular, by controlling the temperature of intermediate products, it is possible to stably produce high-quality overhead optical cables irrespective of the type of coating resin of the overhead optical cables to be manufactured and the change in the linear speed in the overhead optical cable manufacturing equipment. be able to. Further, the overhead optical cable manufacturing apparatus of the present invention has a mechanism for moving the position of the extra length providing apparatus. As a result, it is possible to stably produce an overhead optical cable having excellent quality.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating an example of an apparatus for manufacturing an overhead optical cable according to the present invention.

FIG. 2 is a schematic configuration diagram showing an example of a cooling device of the apparatus for manufacturing an overhead optical cable of the present invention.

FIG. 3 is a schematic configuration diagram showing an example of a surplus length forming apparatus of the overhead optical cable manufacturing apparatus of the present invention.

FIG. 4 is a perspective view showing an example of an overhead optical cable according to the prior invention.

FIG. 5 is a configuration diagram showing an example of an apparatus for manufacturing an overhead optical cable according to the prior invention.

FIG. 6 is a perspective view showing an intermediate product in a manufacturing method of the prior invention.

FIG. 7 is a perspective view showing an intermediate product in a manufacturing example of the prior invention.

FIG. 8 is an enlarged configuration diagram showing a main part of FIG. 4;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Primary cooling water tank, 2 ... Extra length forming pulley, 3 ... Secondary cooling water tank, 11 ... Support line, 12 ... Connection part, 13 ... Optical cable, 14 ... Support line main body, 16 ... Cable core, 18 ... Separation part, 22: Separation part forming device, 23: Primary cooling water tank, 2
4: extra length forming pulley, 25: secondary cooling water tank

Continued on the front page (72) Inventor Hiroto Watanabe 1440, Mukurosaki, Sakura City, Chiba Prefecture Inside Fujikura Sakura Factory (72) Inventor Suehiro Miyamoto 1440, Misaki, Sakura City, Chiba Prefecture Fujikura Corporation, Sakura Factory

Claims (2)

[Claims] An extruder for extruding and covering a support wire main body and an optical cable core at one time to integrate a support wire and an optical cable at a connection portion, and a connection portion between the support wire and the optical cable extruded from the extruder. A resin that intermittently separates the resin in the longitudinal direction while the resin is not solidified, a primary cooling device that cools the optical cable and the support wire whose connection part is intermittently separated by the separating device, and a primary cooling device that A surplus length providing device that increases the traveling speed of the optical cable cooled by the traveling speed of the support wire more than the traveling speed of the support line, and causes the optical cable to sag.
A secondary cooling device that recools the optical cable that is sagging with respect to the support line by the extra length providing device together with the support line, and a take-off device that takes over the overhead optical cable cooled and solidified by the secondary cooling device. A manufacturing device, wherein the primary cooling device and the secondary cooling device are provided with a mechanism for controlling a temperature of an optical cable and a support wire discharged from an outlet of each device, and an optical fiber cable characterized by being provided. Manufacturing equipment. 2. An extruder for simultaneously extruding and covering a support wire main body and an optical cable core to integrate a support wire and an optical cable at a connection portion, and a connection portion between the support wire and the optical cable extruded from the extruder. A resin that intermittently separates the resin in the longitudinal direction while the resin is not solidified, a primary cooling device that cools the optical cable and the support wire whose connection part is intermittently separated by the separating device, and a primary cooling device that A surplus length providing device that increases the traveling speed of the optical cable cooled by the traveling speed of the support wire more than the traveling speed of the support line, and causes the optical cable to sag.
A secondary cooling device that recools the optical cable that is sagging with respect to the support line by the extra length providing device together with the support line, and a take-off device that takes over the overhead optical cable cooled and solidified by the secondary cooling device. An apparatus for manufacturing an overhead optical cable, characterized in that the extra length providing device is provided with a moving mechanism for changing a position between the primary cooling device and the secondary cooling device.