JPH10268170A - Manufacture of optical fiber cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the spiral groove of a spirally grooved spacer hardly twisted and easily insert an optical fiber into the spiral groove by winding the spirally grooved spacer while it is pinched by a pair of twist preventing rollers. SOLUTION: A delivering machine 110 and a winding machine 120 are synchronously rotated in the same direction, the spiral groove 10 of a spirally grooved spacer 11 is located at an optical fiber storage position A, and the optical fiber 20 fed through a panel strip 130 is stored in the spiral groove 10. A pair of twist preventing rollers 200 are arranged between the delivering machine 110 and the panel strip 130 and near the panel strip 130. A pair of twist preventing rollers 200 are arranged to pinch the spirally grooved spacer 11 from above and below with roller main bodies with their axes kept perpendicular to the spiral groove 10. The abnormal twisting force of the spirally grooved spacer 11 can be suppressed by a pair of twist preventing rollers 200.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing an optical fiber cable in which an optical fiber is housed in a spiral groove of a spiral grooved spacer having a spiral groove.

[0002]

2. Description of the Related Art As shown in FIG. 4, there is conventionally known an optical fiber cable in which an optical fiber 20 is housed in a spiral groove 10 of a spacer 11 having a spiral groove 10 formed of plastic or the like. ing. In FIG. 4, reference numeral 12 denotes a tensile member disposed at the center of the spiral grooved spacer 11, reference numeral 30 denotes a water absorbing tape wound around the outer periphery of the spiral grooved spacer 11, and reference numeral 31 denotes polyethylene provided on the outer periphery of the water absorbing tape. Etc. sheath. Optical fiber 2
As 0, for example, a ribbon optical fiber in which a plurality of optical fiber core wires 21 are arranged in parallel as shown in FIG.

In order to manufacture the above-described optical fiber cable, as shown in FIG. 6, a spiral grooved spacer 11 is unwound from an unwinding machine 110 and wound up by a winding up machine 120, and is also wound up by the unwinding machine 110. The helical groove 10 of the helical grooved spacer 11 is positioned at a fixed position by rotating the machine 120 in the same direction in synchronization with the optical fiber 20 supplied through the eye plate 130 in this state.
Is stored in the spiral groove 10. Although not shown,
After the optical fiber 20 is housed in the spiral groove 10, a water-absorbing tape is wound around the outer periphery thereof, and the sheath is extruded around the outer periphery.

[0004] By the way, what is problematic when manufacturing this kind of optical fiber cable is a process of storing the optical fiber in the spiral groove. That is, as shown in FIG. 7, when the supply point A of the optical fiber 20 is a fixed point, the supply point A
The winding speed of the spiral grooved spacer 11 and the rotation speeds of the unwinder 110 and the winding machine 120 are determined so that the spiral groove 10 is always located at the position shown in FIG. Twisting occurs due to the tension at the time of storing the optical fiber 20 in the groove 10 and the tension at the time of winding the waterproof tape, and the spiral groove 10 is displaced from the storage position A of the optical fiber 20, and This causes a problem that the fiber 20 cannot be accommodated in the spiral groove 10.

Conventionally, in order to solve the above-mentioned problem, it is detected by a sensor or the like that the spiral groove 10 comes off from the storage position A where the optical fiber 20 is stored, and the winding of the spiral grooved spacer 11 is performed based on the detection signal. The picking speed was changed.

[0006]

However, according to such an adjusting method, when the spiral groove comes off from the storage position where the optical fiber is stored, the released spiral groove is quickly returned to the original optical fiber storage position. There was a problem that it was not possible.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and makes it difficult for a spiral groove of a spacer having a spiral groove to be twisted, so that an optical fiber can be easily accommodated in the spiral groove 10. An object of the present invention is to provide a method of manufacturing an optical fiber cable, and a method of manufacturing an optical fiber cable that can be promptly controlled to a normal position when abnormal twisting occurs.

That is, according to the present invention, a spiral grooved spacer having a spiral groove on the outer periphery is unreeled from an unwinding machine and wound by a winding machine, and the unwinding machine and the winding machine are synchronously rotated in the same direction. By positioning the spiral groove of the spiral grooved spacer at the optical fiber storage position,
In a method for manufacturing an optical fiber cable in which an optical fiber supplied through a perforated plate is housed in a spiral groove located at the optical fiber housing position, a pair of twists is provided at least near the housing position where the optical fiber is housed in the spiral groove. A method of manufacturing an optical fiber cable, comprising: arranging a prevention roller and winding up the spiral grooved spacer while sandwiching the spiral grooved spacer between the pair of twist prevention rollers. ).

[0009] Further, there is provided a method for manufacturing an optical fiber cable, characterized in that, when abnormal twisting occurs in the spiral grooved spacer, the angle of the pair of twist preventing rollers with respect to the spiral grooved spacer is changed. Item 2).

According to the first aspect of the present invention, a pair of twist preventing rollers are disposed at least in the vicinity of the storage position where the optical fiber is stored in the spiral groove, and the spacer with the spiral groove is formed by the pair of twist preventing rollers. If the spiral grooved spacer is wound up while being sandwiched, abnormal twisting of the spiral grooved spacer can be suppressed by a pair of twist prevention rollers.
Therefore, the spiral groove of the spacer with the spiral groove is less likely to come off from the storage position of the optical fiber, so that the operation of storing the optical fiber in the spiral groove can be performed efficiently.

According to a second aspect of the present invention, when an abnormal twist is generated in the spiral grooved spacer, the angle of the pair of twist preventing rollers with respect to the spiral grooved spacer is changed. Receives a force in accordance with the rotation of the torsion preventing roller, so that the torsion of the grooved spacer can be easily controlled. This principle is illustrated in FIG.
This will be described using (a), (b), and (c). In FIG. 8, the groove 10 of the grooved spacer 11 is linear for the sake of simplicity. Further, X is a fixed point having no twist, Y is a point where twist is detected, Z is the direction of the force received by the twist preventing roller, L is the winding direction of the grooved spacer A, and 200 is the twist. 3 shows a prevention roller. As shown in FIG. 8A, in a normal state, the groove 10 has no twist, and the twist preventing roller 200 is arranged to be orthogonal to the groove 10. Now, as shown in FIG.
Assume that B is twisted to the right in the traveling direction. In such a case, the twist prevention roller 200 is moved counterclockwise to change the angle of the twist prevention roller 200 with respect to the grooved spacer 11. Then, the grooved spacer 11 receives a force in the Z direction according to the rotation progress of the twist prevention roller 200.
For this reason, the groove 10 quickly returns to a normal state. After the groove 10 returns to a normal state, the twist preventing roller 200 is moved clockwise to be positioned in a state perpendicular to the groove 10. Next, it is assumed that the groove 10 is twisted to the left in the traveling direction as shown in FIG. In such a case, the twist prevention roller 200 is moved clockwise to change the angle of the twist prevention roller 200 with respect to the grooved spacer 11. Then, the grooved spacer 11 receives a force in the Z direction according to the rotation progress of the twist prevention roller 200. For this reason, the groove 10 quickly returns to a normal state. Also in this case, after the groove 10 returns to the normal state, the twist preventing roller 200 is moved counterclockwise to be positioned in a state perpendicular to the groove 10.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a method for manufacturing an optical fiber cable according to the present invention, in which a spiral grooved spacer 11 is unwound from an unwinding machine 110, wound up by a winding up machine 120, and wound up by a unwinding machine 110.
The spiral groove 10 of the spacer 11 with the spiral groove is positioned at the optical fiber storage position A by rotating the winder 120 in the same direction in synchronization with the winder 120.
The method of storing the optical fiber 20 supplied through the spiral groove 10 in the spiral groove 10 is the same as the conventional method, but in the present invention, the optical fiber 20 is provided between the feeder 110 and the eye plate 130 and the eye plate 13.
0, a pair of twist prevention rollers 200 is arranged,
The feature is that abnormal twisting of the spiral grooved spacer 11 is suppressed by sandwiching the spiral grooved spacer 11 between the pair of twist prevention rollers 200.

That is, a pair of twist prevention rollers 200
As shown in FIG. 2A, the roller body 220 comprises a shaft 210 and a roller body 220 rotatably mounted on the outer periphery of the shaft 210. The roller body 220 sandwiches the spiral grooved spacer 11 from above and below. Are arranged as follows. As shown in FIG. 2B, a pair of twist prevention rollers 20 are provided.
Numeral 0 is arranged so that the axis is orthogonal to the spiral groove 10. The shaft 210 of the twist prevention roller 200 includes:
A screw rod 230 rotated by a motor 240 is mounted. Therefore, when the motor 240 is rotated,
The screw rod 230 rotates, and the shaft 210 moves back and forth with the screw rod 230 accordingly.

As described above, the pair of twist prevention rollers 2
When the spiral grooved spacer 11 is sandwiched at 00, the twisting force can be suppressed by the pair of twist prevention rollers 200 even when the spiral grooved spacer 11 is abnormally twisted. In order to effectively prevent abnormal twisting of the spiral grooved spacer 11, it is preferable to arrange a plurality of a pair of twisting prevention rollers 200 at predetermined intervals in the longitudinal direction of the spiral grooved spacer 11, but at least One optical fiber may be arranged near the storage position A where the optical fiber is stored in the spiral groove. Preferably, the optical fibers are arranged before and after the vicinity of the storage position A where the optical fiber is stored in the spiral groove.

Next, a case where abnormal twisting occurs in the grooved spacer 11 will be described. As shown in FIG. 3A, a pair of twist prevention rollers 200 are initially arranged so that their axes are orthogonal to the spiral grooves 10. It is assumed that point B corresponds to the storage position A where the optical fiber shown in FIG. Therefore, when the spiral groove 10 deviates from the point B, the optical fiber also deviates from the storage position A, and the optical fiber is not stored in the spiral groove 10.

It is now assumed that the spiral grooved spacer 11 is twisted to the right with respect to the traveling direction L as shown in FIG. This state is an abnormal state in which the spiral grooved spacer 11 is twisted more than a predetermined amount. When this happens,
The motor 240 shown in FIG. 2 is driven to rotate the screw bar 230, and the pair of twist prevention rollers 200 is moved in a direction in which the intersection angle θ is reduced. Then the grooved spacer 11
Calculates the force according to the rotation progress of the twist prevention roller 200 as Z
Receive in the direction. For this reason, the groove 10 quickly returns to a normal state. After the groove 10 returns to a normal state, the pair of twist prevention rollers 200 is moved in a direction in which the intersection angle θ is widened to return to a state perpendicular to the original groove 10.

Next, as shown in FIG. 3C, it is assumed that the spiral grooved spacer 11 is twisted leftward with respect to the traveling direction L.
This state is an abnormal state where the spiral grooved spacer 11 is not twisted by a predetermined amount. When this happens,
The motor 240 shown in FIG. 2 is driven to rotate the screw rod 230 to move the pair of twist prevention rollers 200 in a direction in which the intersection angle θ increases. Then the grooved spacer 11
Calculates the force according to the rotation progress of the twist prevention roller 200 as Z
Receive in the direction. For this reason, the groove 10 quickly returns to a normal state. After the groove 10 returns to the normal state, the pair of twist prevention rollers 200 is moved in a direction in which the intersection angle θ is reduced to return to a state perpendicular to the original groove 10.

In the above method, it is necessary to drive the motor by detecting that the spiral groove 10 has deviated from the point B, but as means for detecting that the spiral groove 10 has deviated from the point B, For example, by providing a projection at the bottom of the eyeboard,
By inserting the projection into the spiral groove, the eye plate is configured to be twisted corresponding to the twist of the spiral groove, and the rotation deviation due to the twist of the eye plate is detected by potentiometer, What is necessary is just to drive the motor 240 based on this detection signal.

The pair of twist prevention rollers 200
In addition, as shown in FIG. 1, a control mechanism 300 for moving the perforated plate back and forth, and a control mechanism 40 for controlling the take-up speed.
When a potentiometer detects that the perforated plate has been twisted, a detection signal is sent according to the amount of the torsion, and the motor 240 for driving the torsion prevention roller and the perforated plate are moved back and forth. To the control mechanism 300 for moving the anti-twist roller, the control mechanism 300 for moving the perforated plate back and forth, and the control mechanism 400 for controlling the take-up speed. Is configured to control the storage position in which the spiral groove is housed at a fixed position, the spiral groove can be quickly positioned at a predetermined position even when the torsion of the spacer with the spiral groove is large. There is an advantage.

In the above embodiment, initially,
Although the pair of twist prevention rollers 200 are arranged so that their axes are orthogonal to the spiral groove 10, the pair of twist prevention rollers 200 do not necessarily have
It does not have to be orthogonal to 0. The structure of the optical fiber used in the present invention is not particularly limited. Further, as means for detecting the twist of the spacer having a spiral groove, any means such as an image detecting means can be adopted.

[0021]

As described above, according to the method of manufacturing an optical fiber cable according to the present invention, a spacer with a spiral groove having a spiral groove on the outer periphery is unreeled from an unwinding machine, wound up by a winding machine, and unwinded by a unwinding machine. By rotating the winding machine in the same direction in synchronization with the winding machine, the spiral groove of the spacer with the spiral groove is positioned at the optical fiber storing position, and the optical fiber supplied through the eye plate into the spiral groove located at the optical fiber storing position is supplied. In the method for manufacturing a stored optical fiber cable, at least a pair of twist prevention rollers are disposed in the vicinity of the storage position where the optical fiber is stored in the spiral groove,
Since the method for manufacturing an optical fiber cable is characterized in that the spiral grooved spacer is wound up while the spiral grooved spacer is sandwiched between the pair of twist prevention rollers, abnormal twisting of the spiral grooved spacer is prevented. It can be suppressed by a pair of twist prevention rollers. Therefore, the spiral groove of the spacer with the spiral groove is less likely to come off from the storage position of the optical fiber, so that the operation of storing the optical fiber in the spiral groove can be performed efficiently.

In addition, when abnormal twisting occurs in the spiral grooved spacer, the angle of the pair of twisting prevention rollers with respect to the spiral grooved spacer is changed. Appropriate force can be applied. Therefore, the twist of the grooved spacer can be easily controlled.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing one embodiment of a method for manufacturing an optical fiber cable according to the present invention.

FIGS. 2A and 2B show an embodiment of a pair of twist prevention rollers used in the present invention, wherein FIG. 2A is a side view and FIG.

FIGS. 3A and 3B show the use state of a pair of twist prevention rollers. FIG. 3A is a schematic plan view showing a state in which the spiral grooved spacer has no twist. FIG. FIG. 3C is a schematic plan view of a twisted state, and FIG. 3C is a schematic plan view of a state where the spiral grooved spacer is twisted to the left in the traveling direction.

FIG. 4 is a sectional view showing an embodiment of the optical fiber cable.

FIG. 5 is a sectional view showing an embodiment of an optical fiber.

FIG. 6 is a schematic explanatory view showing one embodiment of a conventional method for manufacturing an optical fiber cable.

FIG. 7 is a schematic plan view when storing an optical fiber in a spiral groove.

FIG. 8 shows an operation state of a twist prevention roller.
(A) is a schematic plan view showing a state in which the spiral grooved spacer has no twist, (B) is a schematic plan view showing a state in which the spiral grooved spacer is twisted rightward in the traveling direction, and (C) is a spiral grooved spacer. FIG. 3 is a schematic plan view of a state in which it is twisted to the left in the traveling direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Spiral groove 11 Spacer with a spiral groove 20 Optical fiber 110 Feeding-out machine 120 Winding machine 130 Eyeboard 200 A pair of twist prevention rollers

Claims (2)

[Claims] 1. A spiral grooved spacer having a spiral groove on its outer periphery is unreeled from an unwinder and wound by a winder, and the unwinder and the winder are rotated in the same direction in synchronization with each other. A method for manufacturing an optical fiber cable comprising: positioning a spiral groove of a spacer with an optical fiber at a storage position of an optical fiber, and storing the optical fiber supplied through the eye plate into the spiral groove positioned at the storage position of the optical fiber. A pair of twist prevention rollers are disposed near the storage position where the spiral groove spacers are stored in the groove, and the spiral groove spacer is wound up while the spiral groove spacer is sandwiched between the pair of twist prevention rollers. Manufacturing method of optical fiber cable. 2. The method according to claim 1, wherein when an abnormal twisting occurs in the spiral grooved spacer, an angle of the pair of twist preventing rollers with respect to the spiral grooved spacer is changed.
A manufacturing method of the optical fiber cable according to the above.