JP2000072329A - Bobbin for optical fiber, etc., and winding method thereof to this bobbin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the work of unwinding the wind starting end of an optical fiber. SOLUTION: A cut end of an optical fiber f is held between a stationary platen of a turning shaft and a flange 1 of a bobbin B and locked up thereto, then a part of the optical fiber f separated to the radial direction of the flange 1 is put into an inner recess 1e of the flange 1 from an inlet groove 1b, and it is guided by an inclined guide way 1d, winding it on a body 2. According to this method, a part of the optical fiber f ridden over the flange 1 is wound on the body 2 after passing through the recess 1e, so that it will not be strongly pressed to an inner surface 1c of the flange 1 by the optical fiber f to be wound on the bobbin B in a laminated state. Therefore, a wind starting end of the optical fiber f is unwound without hindrance, and thus the measuring of a transmission loss or the like is easily performable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bobbin for winding an optical fiber or a similar linear member (hereinafter referred to as an optical fiber) and a method of winding an optical fiber or the like around the bobbin.

[0002]

2. Description of the Related Art Conventionally, as a method for automatically winding an optical fiber around a bobbin provided with flanges at both ends of a body, winding methods shown in FIGS. 8 to 13 are known (as a basic method). See JP-A-8-151226).
In this winding method, a step of opening the chuck 11 and hanging the cut end fa of the optical fiber f on the rotating shaft 12 (FIG. 8)
A step of mounting the bobbin B on the rotating shaft 12 and fixing the cut end (winding end) fa of the optical fiber f between the fixed plate 13 of the rotating shaft 12 and the flange 1 of the bobbin B (FIG. 9). ), The chuck 14 is opened (FIG. 10), the bobbin B is rotated by a predetermined angle with the rotating shaft 12 and temporarily stopped, and the portion fb of the optical fiber f separated in the radial direction of the flange 1 is moved to a lateral moving member 15 such as a roller. Step of moving to inside the collar 1 (FIGS. 11 and 12)
Then, the bobbin B is rotated again by the rotating shaft 12 and
The bobbin B is stopped immediately before the optical fiber fb that has passed over the bobbin B contacts the body 2 of the bobbin B (FIG. 13), and the lateral moving member 15 is moved.
Is retracted to the outside of the bobbin B, and then the bobbin B is rotated so that the optical fiber fb is wound around the body 2 of the bobbin B. It winds up on bobbin B via 16.

The reason for stopping the bobbin B without bringing the optical fiber f into contact with the body 2 is that the optical fiber f
Is moved to the root portion of the collar 1 without resistance to start winding. 8 to 13, the left is a front view, and the right is a side view.

[0004]

In the above-mentioned conventional winding method, the portion fb of the optical fiber f having passed over the flange 1 is formed by the optical fiber f wound around the bobbin B in a laminated state.
After the winding is completed, the winding start end fb of the optical fiber f is pulled out from the bobbin B for a predetermined length, and it is difficult to measure the transmission loss. The optical fiber f
There is a problem that it is cut.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bobbin for an optical fiber or the like and a method for winding the optical fiber or the like which can be easily pulled out from the bobbin after the winding of the optical fiber or the like is completed. . Another object of the present invention is to provide a bobbin such as an optical fiber and a winding method capable of smoothly winding an optical fiber or the like around a bobbin.

[0006]

In order to achieve at least one of the above objects, the present invention is directed to a bobbin such as an optical fiber in which flanges are provided at both ends of a body, respectively. A groove for introducing an optical fiber or the like is provided on the outer periphery of the groove, and an inclined guide surface for guiding an optical fiber or the like inserted into the inside of the flange from the introduction groove to the body is formed on the inner surface of the flange. Was formed and provided.

In the above-mentioned means, an optical fiber or the like is introduced into the recess inside the flange from the introduction groove formed in the flange, and is gradually wound near the body along the inclined guide surface. For this reason,
The portion of the optical fiber or the like that has passed over the flange is not strongly pressed against the flange by the optical fiber or the like wound around the bobbin in a laminated state.

According to a second aspect of the present invention, the bobbin according to the first aspect is mounted on a rotating shaft, and an optical fiber or the like is wound between a fixed plate of the rotating shaft and a flange of the bobbin provided with an introduction groove. A step of fixing the end by sandwiching the end, and a step of moving a portion of the optical fiber or the like separated in the radial direction of the flange into the inside of the flange by moving the optical fiber or the like into the inside of the flange from the introduction groove by moving the laterally moving member, Rotating the bobbin around the rotation shaft to guide the optical fiber or the like on the inclined guide surface and wind the optical fiber or the like around the body.

In this means, the optical fiber or the like which has passed over the bobbin flange and has been inserted into the recess inside the flange from the introduction groove,
It is guided by the inclined guide surface from the inner end of the introduction groove and wound around the body. Therefore, the portion of the optical fiber or the like that has passed over the flange is not strongly pressed against the inner surface of the flange by the optical fiber or the like wound around the bobbin in a layer.

[0010]

Embodiments of the present invention will be described with reference to the drawings. 1 to 4 show an embodiment of the present invention. The basic structure of the bobbin B is the same as the conventional one, and flanges 1 and 1 are provided at both ends of the body 2, respectively.

The outer periphery 1a of the flange 1 of the bobbin B is provided with an introduction groove 1b.
Is provided on the inner surface 1c of the flange 1 with an inclined guide surface 1d formed with a recess 1e. The introduction groove 1b introduces the optical fiber f from the outside to the inside of the flange 1, and the inclined guide surface 1d guides the optical fiber f introduced from the introduction groove 1b to the body 2. . Dent 1
e communicates with the inner end of the introduction groove 1b. Reference numeral 2a denotes an insertion hole for the rotating shaft 12 provided in the body 2.

Although the guide groove 1b, the inclined guide surface 1d and the recess 1e are not provided on the left flange 1 of the bobbin B in FIG. 1, the guide groove 1b and the like may be provided similarly to the right flange 1. it can. As can be seen from FIGS. 2 and 3, the introduction grooves 1b and the like are provided at four intervals of 90 degrees, but the number thereof is not limited to that shown in FIG.

Next, a method of winding the optical fiber f or the like around the bobbin B having the above configuration will be described. This winding method includes the following steps. That is, the chuck 11 (FIG. 8)
13 to 13), the cutting end fa of the optical fiber f is hung down on the rotary shaft 12, and the bobbin B is mounted on the rotary shaft 12 and the fixed plate 13 of the rotary shaft 12 and the bobbin A step of fixing the wound end (cut end) fa of the optical fiber f or the like between the flange 1 of B and the chuck, opening the chuck 14, rotating the bobbin B by the rotating shaft 12 by a predetermined angle, and temporarily stopping the bobbin B; A portion f of an optical fiber or the like f separated in the radial direction of the flange 1
b is moved inside the flange 1 by the laterally moving member 15 so that the optical fiber or the like f enters the inside of the flange 1 from the introduction groove 1b, and the bobbin B is rotated by the rotating shaft 12 to guide the optical fiber or the like f incline. An optical fiber or the like f is wound around the bobbin B through a step of winding around the body 2 while being guided on the surface 1d.

In the last step, actually,
The bobbin B is rotated by the rotating shaft 12 to temporarily stop the bobbin B immediately before the optical fiber or the like fb that has passed over the flange 1 comes into contact with the body 2 of the bobbin B (see FIG. 13), and the lateral moving member 15
Is retracted to the outside of the bobbin B, and then the bobbin B is rotated to wind the optical fiber f around the body 2 of the bobbin B. Further, the chuck 11 is opened and the winding end fa of the optical fiber f or the like is opened.
Is suspended on the rotating shaft 12, the first step is optional in the present invention.

In the above-mentioned winding method, the introduction groove 1b, the inclined guide surface 1d or the recess 1e is usually detected by a contact type sensor or a non-contact type sensor using infrared rays or the like, and the bobbin B is detected by the detection signal. By controlling the rotation and stop of the (rotating shaft 12), the optical fiber f or the like is moved from the introduction groove 1b to the flange 1
To be properly introduced inside. Multiple introduction grooves 1
In the case of the bobbin B having b, etc., the actually used introduction groove 1
In addition to b, etc., it is possible to use the sensor to detect the introduced groove 1b or the like.

According to the above-described bobbin B and the winding method, the portion fb of the optical fiber or the like f that has passed over the flange 1 is recessed 1e
And is wound around the body 2 through the bobbin B, so that it is not strongly pressed against the inner surface 1c of the flange 1 by the optical fiber f wound around the bobbin B in a laminated state. Therefore, it is possible to easily measure the transmission loss and the like by unwinding the winding start end fb of the optical fiber f without any trouble. Also, unlike the conventional bobbin in which the winding start end of the optical fiber f is present along the inner surface of the flange 1 from the outer periphery 1a of the flange 1 to the body 2, the winding start end fb of the optical fiber f is recessed 1e. Therefore, winding of the optical fiber or the like f after winding can be performed smoothly and densely.

5 to 7 show another embodiment of the present invention. In the case of the bobbin B, a winding groove 1g is provided along the outer periphery 1a of the flange 1 provided with the introduction groove 1b and the like. The winding groove 1g is for winding an optical fiber or the like f, and has a substantially V-shape whose bottom is narrowed as it approaches the inner surface 1c of the flange 1. In addition, winding groove 1
The shape of g is not limited to the above, and may be another shape.

In the case of the bobbin B, the optical fiber f or the like put into the introduction groove 1b from the outer end of the introduction groove 1b is first wound around the winding groove 1g of the flange 1, and then the inner end of the introduction groove 1b. Is guided by the inclined guide surface 1 d and wound around the body 2. Other structures and processes are the same as those of the bobbin B of FIGS.

In the case of a bobbin B in which a plurality of introduction grooves 1b and the like are provided in one flange 1, an optical fiber f or the like wound in one introduction groove 1b and wound around a winding groove 1g.
Can be put inside the flange 1 from the above-described introduction groove 1b or another introduction groove 1b. Therefore, the number of times the optical fiber f is wound around the winding groove 1g is not necessarily one or more times, such as か or ／ (the minimum in the figure is ４), or less than one time. It is possible.

In the case of the bobbin B and the winding method, when measuring the transmission loss, the optical fiber f wound around the winding groove 1g of the flange 1 is unwound. Therefore, an optical fiber or the like f
Can be unwound more smoothly and longer.

[0021]

As described above, according to the first or second aspect of the present invention, the winding start end of the optical fiber or the like is formed on the inner surface of the flange by the optical fiber or the like wound around the bobbin in a laminated state. There is no strong pressing. Therefore, it is possible to easily pull out the bobbin without cutting the winding start end of the optical fiber or the like. Further, since the winding start end of the optical fiber or the like is recessed, the winding of the optical fiber or the like after the winding can be performed smoothly and densely.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a bobbin such as an optical fiber according to the present invention.

FIG. 2 is a sectional view taken along the line (II-II) of FIG.

FIG. 3 is a side view of the bobbin of FIG. 1;

FIG. 4 is an external view of a main part of the bobbin of FIG.

FIG. 5 is a front view showing another embodiment of a bobbin such as an optical fiber according to the present invention.

6 is an external view of a main part of the bobbin of FIG.

FIG. 7 is also a sectional view.

FIG. 8 is a view showing one step of a method of winding an optical fiber around a bobbin.

FIG. 9 is also a view showing the next step.

FIG. 10 is a view showing another process.

FIG. 11 is a view showing another process.

FIG. 12 is a view showing still another step in the same manner.

FIG. 13 is a view showing still another step.

[Explanation of symbols]

 B Bobbin 1 Flange 1a Outer circumference 1b Introducing groove 1c Inner surface 1d Inclined guide surface 1e Depression 1g Winding groove 2 Body 12 Rotating shaft 13 Fixed plate 15 Horizontal moving member f Optical fiber fa Cutting end (winding end) fb Winding start end

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H038 CA35 3F056 EA04 EB01 3F058 AA08 AB03 AC14 BB19 CA02 DA05 DB05 DC01 HA02 HB02 4L045 AA05 BA03 BA60 DC21

Claims (2)

[Claims] 1. A bobbin, such as an optical fiber, in which flanges are provided at both ends of a body, wherein an introduction groove for an optical fiber or the like is provided on an outer periphery of at least one of the flanges. A bobbin for an optical fiber or the like, wherein an inclined guide surface for guiding an optical fiber or the like put inside the body to the body is formed so as to form a recess connected to the inner end of the introduction groove. 2. The bobbin according to claim 1, which is mounted on a rotary shaft, and fixed between the fixed plate of the rotary shaft and a flange of the bobbin provided with an introduction groove with a winding end of an optical fiber or the like interposed therebetween. A step of moving a portion of the optical fiber or the like radially separated from the flange by a laterally moving member to the inside of the flange to insert the optical fiber or the like into the inside of the flange from the introduction groove; Rotating the optical fiber and the like on an inclined guide surface and winding the optical fiber and the like around a body.