JPH069240A - Method for winding optical fiber into trapezoidal form - Google Patents

Abstract

PURPOSE:To provide a method for economically winding optical fiber into a trapezoidal form in which the reversing position of traverse direction can accurately be controlled without bulking equipment. CONSTITUTION:The method for winding optical fiber 1 into a trapezoidal form is to slowly narrow the traverse width and wind the optical fiber 1 so as to provide the trapezoidal form to the cross-sectional shape of the wound optical fiber 1 as a bundle with the winding of the optical fiber 1 in an arranged state onto a bobbin 2. In this method, a reference point (S) is set within an inner width of the bobbin 2 and the travel distance of the wound optical fiber 1 from the passage of the reference point (S) is sensed with a rotation sensor 15 connected to a screw shaft 10. When the travel distance attains the prescribed set value, the traverse direction is reversed and calculation is made with an electrical arithmetic unit 14 so as to increase or decrease the set value for each reversal of the traverse direction by a prescribed value. Thereby, the traverse width can slowly be narrowed to perform the accurate control over the reversing position of the traverse direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trapezoidal winding method for an optical fiber, and more particularly, it is applied to a bobbin which is wound so that the cross section of the optical fiber as a bundle in the wound state becomes a trapezoid. And useful.

[0002]

2. Description of the Related Art When checking the transmission characteristics of an optical fiber during the manufacturing process of the optical fiber, it is essential to take out the winding start opening of the wound optical fiber from the bobbin. Therefore, as a winding method of an optical fiber in which the winding start opening of the optical fiber can be easily taken out and the load does not collapse, there is a trapezoidal winding method in which the cross-sectional shape of the wound optical fiber bundle is trapezoidal. It is commonly used.

FIG. 3 is an explanatory view showing an apparatus for realizing a conventional trapezoidal winding method for an optical fiber. As shown in the figure, the optical fiber 1 is vertically pulled down through a guide wheel 4 and wound around a bobbin 2 provided at one end of a bobbin shaft 7 rotatably supported by a bobbin support 6. The winding drive system of the bobbin 2 is configured so that the power of the motor 8 is transmitted to the bobbin 2 via the bobbin shaft 7 connected to the rotation shaft of the motor 8 by an interlocking mechanism. The rotation speed N _i of the bobbin 2 at this time is detected by the detector 13 coupled to the rotation shaft of the motor 8. Further, one end of the bobbin support 6 is slidably fitted to the guide shaft 11, and the central portion is screwed to the screw shaft 10 driven by the motor 9, so that the rotation of the motor 9 causes a predetermined traverse. Traverse left and right at speed. At this time, the bobbin support 6 constitutes a traverser, and the reversal position of the bobbin support 6 is detected by a reference point detector 12 at a reference point S within the inner width of the bobbin.
The electric arithmetic unit 14 measures the elapsed time after the traverser has passed, and when the passage of a predetermined time is detected, the traverse direction is reversed. That is, when the traverser passes through the reference point S as the traverser passes through the layers, the elapsed time is measured, and the traverser is reversed when the passage of a predetermined time is detected. The optical fibers 1 are aligned and wound in a laminated manner. As a result, the optical fiber 1 is wound into a trapezoid having a predetermined base angle α.

FIG. 4 shows the bobbin 2 mounted on the bobbin 2 by the device shown in FIG.
1 shows a partially enlarged view of an optical fiber 1 to be wound up. Same figure
Is the height when one layer of the optical fiber is wound up.
Letting the diameter of the bar be d, h = k · d, where k (≦ 1) is
Constant, l₁, L₂… L_iIs the first layer, the second layer ... the i-th layer
Inner width of bobbin Center of outermost fiber of each layer from reference point S
To the side of the trapezoid of the laminated optical fiber and the bottom
Angle, v₁, V₂... v_iIs the 1st layer, 2nd layer ... i-th layer
Traverse speed at N₁, N₂... N_iIs the first layer, the second layer
Eye: i-th layer bobbin shaft speed, p is traverse pitch,
t₁, T₂... t _iIs the 1st layer, 2nd layer ... i-layer traverser
The elapsed time after passing the reference point S is
The numbers 1, 2, 3, 4 are obtained.

[0005]

[Equation 1]

[0006]

[Equation 2]

[0007]

[Equation 3]

The following equation 4 is obtained from the above equations 1, 2 and 3.

[Equation 4]

Therefore, t _i is the reversal position l _{1 in} the traverse direction of the first layer, the bobbin rotation speed N _i detected by the rotation detector 13, the reversal count i in the traverse direction, the fiber diameter d, and the trapezoidal bottom. It is a function of the angle α. Electrical computing device 1
4 automatically calculates t _i based on the equation 4, measures t _i from the passage detection signal of the reference point detector 12, and calculates the motor 9
To control the reverse position in the traverse direction.

FIG. 5 is an explanatory view showing an apparatus for realizing another conventional trapezoidal winding method for an optical fiber. In the figure, those parts which are the same as those corresponding parts in FIG. 3 are designated by the same reference numerals, and a overlapping description will be omitted.

As shown in FIG. 5, the left side of the traverse width is regulated by the output signal of the detector 15, and the right side of the traverse width is regulated by the output signal of the detector 16.
16 is a motor 19, 2 by an electromagnetic clutch 17, 18.
It is moved by connecting and disconnecting it to the power shaft of 0. That is, the detectors 15 and 16 are moved inward (detector 15 on the left side and detector 16 on the right side) by a predetermined width by the motors 19 and 20 every time the traverse direction is reversed, and the traverse width is gradually narrowed. The optical fiber 1 is wound into a trapezoid. After the winding of the optical fiber 1 is completed, the clutches 17 and 18 are deenergized and the manual handle 2
It is necessary to return the detectors 15 and 16 to the initial positions where the stoppers 23 and 24 are provided by rotating the Nos. 1 and 22 or newly providing an automatic return mechanism.

[0012]

The trapezoidal winding method of the optical fiber according to the prior art as described above has the following problems.

(A) In the trapezoidal winding method of the optical fiber shown in FIG. 3, the elapsed time Ti after the wound optical fiber passes the reference point S is obtained as a function of the traverse speed Vi. The traverse speed Vi is indirectly obtained by the rotation speed Ni of the bobbin shaft detected by the rotation detector 13 and the predetermined traverse pitch P. Therefore, it is necessary to control so that the relative relationship between the rotation speed Ni of the bobbin shaft and the rotation speed Ni ′ of the traverse screw shaft 10 that determines the actual traverse speed is always a predetermined value, and a deviation occurs in these rotation speeds. In that case, the actual traverse pitch P ′ deviates from the predetermined traverse pitch P, resulting in an error in the reversal position li in the traverse direction.

(B) In the trapezoidal winding method of the optical fiber shown in FIG. 5, since the left and right detectors 15 and 16 for controlling the traverse width are moved, the motors 19 and 20 and the clutches 17 and 18 and the like are moved. It is necessary to provide a drive mechanism,
As the equipment becomes larger, its structure becomes more complicated. Further, when the operation of returning the detectors 15 and 16 to the initial position where the stoppers 23 and 24 are provided is manually performed, the burden on the operator is increased, while an automatic return mechanism for automatically performing the operation is attached. The equipment becomes large and the cost increases.

In view of the above-mentioned prior art, the present invention provides an optical fiber trapezoidal winding method which is economical without increasing the size of equipment and can accurately control the reversal position in the traverse direction. With the goal.

[0016]

The structure of the present invention that achieves the above object is such that the traverse width is gradually narrowed as the optical fibers are wound on the bobbin in an aligned manner, and the optical fibers are bundled as a bundle of the wound optical fibers. In a trapezoidal winding method of an optical fiber wound to have a trapezoidal cross-sectional shape, a certain point within the inner width of the bobbin is used as a reference point, and the moving distance after the wound optical fiber passes the reference point is The traverse direction is inverted when the moving distance reaches a predetermined set value, and the set value is calculated by an electric arithmetic unit so as to increase or decrease by a predetermined value each time the traverse direction is reversed. The reverse position of the traverse direction is controlled so that the traverse width becomes gradually narrower.

[0017]

According to the present invention having the above-mentioned structure, the moving distance after the optical fiber wound on the bobbin passes through the reference point within the inner width of the bobbin can be accurately obtained by the electric arithmetic unit. The traverse direction is reversed by comparing the moving distance with a predetermined set value, and further, the set value is calculated by an electric arithmetic unit so as to increase or decrease by a predetermined value each time the traverse direction is reversed, so the traverse width is gradually increased. And the optical fiber is trapezoidally wound.

[0018]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is an explanatory view showing an apparatus for realizing a trapezoidal winding method for an optical fiber according to this embodiment. In the figure, those parts which are the same as those corresponding parts in FIG. 3 are designated by the same reference numerals, and a overlapping description will be omitted.

As shown in FIG. 1, the reference point detector 12 is
At the position of the reference point S set within the inner width of the bobbin, the optical fiber 1
It is detected that the reference point S is occupying on the straight line passing through the optical fiber 1 which is wound vertically downward from the guide wheel 4 and the reference point detector 12, and this output signal is electrically calculated. To the device 14. Rotation detector 15
Is a screw shaft 1 for traverse that is driven to rotate by a motor 9.
The number of rotations of 0 is detected, and this output signal is output to the electrical arithmetic unit 1
Send to 4. The electrical arithmetic unit 14 is the reference point detector 1.
2 and the output signals of the rotation speed detector 15 are processed to obtain the moving distance after the traverser has passed the reference point S, and when the moving distance reaches a predetermined set value, the motor 9 is reversed so that the traverse direction is reversed. To control. Moreover, the set value is calculated by the electrical arithmetic unit 14 so as to increase or decrease by a predetermined value each time the traverse direction is reversed. As a result, the traverse width is regulated and gradually narrowed, and the optical fiber is wound into a trapezoidal shape.

FIG. 2 is an explanatory view showing a concrete example of winding in the trapezoidal winding method of FIG. As shown in the figure, the first traverse moves from the reference point S by l ₀ ′,
When the distance of l ₀ ′ is reached, the traverse direction is reversed, and when it returns from the reference point S to the position of l ₀ , the traverse direction is reversed again. At the time of this inversion, l ₀ ′ is decreased by a preset value h, l ₀ is increased by h, and l ₁ ′ = l ₀ ′ −h and l ₁ ≦ l ₀ + h. Therefore, when the traverse direction inversion is repeated n times, l _n = l _n-1 + h and l _n ′
= Ln _- 1' _- h. By inputting l ₀ , l ₀ ′ and h in advance, the bundle of the wound optical fibers can have an arbitrary trapezoidal sectional shape.

The above embodiment is an example in which the reference point S is set outside the trapezoid, but the reference point S can be arbitrarily set as long as it is within the inner width of the bobbin.

[0023]

As described in detail with reference to the above embodiments, the present invention provides a trapezoidal winding method for an optical fiber capable of accurately obtaining the traverse distance and enabling more accurate traverse reversal position control. Can be provided. Further, as the facility, it is not necessary to install a new device or the like, and the above effect can be economically achieved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an apparatus that realizes a trapezoidal winding method for an optical fiber according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a specific example of winding in the trapezoidal winding method of FIG.

FIG. 3 is an explanatory diagram showing an apparatus that realizes a trapezoidal winding method for an optical fiber according to a conventional technique.

4 is a partially enlarged view of an optical fiber wound on a bobbin by the trapezoidal winding method shown in FIG.

FIG. 5 is an explanatory view showing an apparatus that realizes a trapezoidal winding method for an optical fiber according to a conventional technique.

[Explanation of symbols]

 9 motor 10 screw shaft 12 reference point detector 14 arithmetic unit 15 rotation detector

Claims (1)

[Claims] 1. A trapezoidal winding of an optical fiber in which a traverse width is gradually narrowed as the optical fiber is wound around a bobbin in an aligned manner and the cross-sectional shape of the wound optical fiber bundle is trapezoidal. In the taking method, a certain point within the inner width of the bobbin is used as a reference point, and the moving distance after the optical fiber to be wound passes through the reference point is detected, and when the moving distance reaches a predetermined set value. To reverse the traverse direction, and the set value is calculated by an electric calculation device so as to increase or decrease by a predetermined value each time the traverse direction is reversed, and the reverse position in the traverse direction is gradually reduced so that the traverse width becomes narrower. A trapezoidal winding method for an optical fiber, which is characterized in that: