JP2003137588A - Flanged bobbin for optical fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flanged bobbin for an optical fiber which can evade a problem causing quality degradation of a striated body such as a wound optical fiber such as unevenness by pressure, bending, clinching, or disconnection, etc. SOLUTION: The flanged bobbin for the optical fiber has flanges on both the ends of a straight cylinder, wherein a slit is provided on the flange extending from an outer periphery toward inside, at the top of the slit, a through hole communicating with the slit is provided, the inner periphery of the through hole is formed in a tilting surface, and on the insides of both the flanges narrow grooves are provided radially from the center towards the outer periphery. An elastic sheet is struck on the straight cylinder at the time of assembling the flanged bobbin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber flange bobbin used for winding an optical fiber or an optical fiber cable having a coating layer formed on the outer periphery of the optical fiber. The present invention relates to an optical fiber flange bobbin having an auxiliary ring for winding the end of a fiber cable.

[0002]

2. Description of the Related Art FIG. 16 shows a flange bobbin B for optical fiber.
FIG. 17 is a schematic side view showing a state in which the filament F such as an optical fiber is fully wound, FIG. 17 is a front view of FIG. 16, and 18 is the filament F of FIG.
FIG. 7 is an enlarged front view of the main part showing the arrangement state in which the winding start ends F1 and F2 of FIG.

A conventional optical fiber flange bobbin B (hereinafter referred to as bobbin B) shown in FIG. 16 is provided with disk-shaped flanges 2 and 2 at both ends of a cylindrical body 1 and one flange 2 is provided. In the vicinity of the outer peripheral edge portion, two small-diameter passage holes 3 and 3 penetrating at right angles to the thickness of the flange 2 are arranged at 180 ° intervals, and a flange is provided on the surface opposite to the body 1 installation side. A structure in which the auxiliary ring 4 is connected has been proposed.

In order to finish the winding of the filament body F such as an optical fiber on the bobbin B, first of all, the filament body F is provided with the winding start end portion F1 of the filament body F in the vicinity of the outer peripheral edge portion of the flange 2. It is necessary to insert one of the small-diameter passage holes 3 and 3 into the passage hole 3 from the side surface on which the body 1 of the flanges 2 and 2 is provided (hereinafter referred to as the inner side) to the opposite surface side (hereinafter referred to as the outer side). The length, for example, about 3 m to 10 m is wound around the auxiliary ring 4 and the tip is fixed. The required length wound around the auxiliary ring 4, for example, about 3 m to 10 m is used for evaluating the permeability.

After that, the filament F fed from the device (not shown) is parallel to the axial direction of the bobbin B while the bobbin B loaded in the winding device (not shown) is rotating. While reciprocatingly traversing, the regular winding is repeated to wind a fixed amount, and the end portion of the winding is inserted into the other through hole 3 and fixed to the flange 2.

Passage holes 3 and 3 penetrating through the flange 2 are provided so that the winding start of the filamentous body F can be stably supported and wound while the filamentous body F1 traverses the auxiliary ring 4 across the flange 2 to reach the body 1. It is intended to stabilize the conditions.

However, the winding start end portions F1 and F of the filamentous body F are
In the arrangement state in which 2 is inserted through the passage hole 3, the passage hole 3,
The winding start end portion F1 and the winding start end portion F2, which are in contact with the peripheral edge portion of the opening 3 and form a hanging shape, form a crank shape having an acute angle. Due to this, unevenness and cracks are generated in the clad portion of the filamentous body F that is in contact with the peripheral edge portion of the opening, and even the core portion thereof is likely to be bent or bent to cause deformation damage.

Further, the filamentous body F2 of the filamentous body F is drooped while abutting on the inner surface of the flange 2 and guided to the surface of the body 1, and as it is, reciprocally traverses the body 1 as it is and repeats the regular winding to repeat a certain amount. Is wound up. However,
At the time of this winding, since the filamentous body F2 that abuts and hangs down on the inner surface of the flange 2 projects from the inner surface of the flange 2, the filamentous body F
In the aligned winding, the pole portions are brought into contact with each other from the innermost layer to the outermost layer, and the pressing force of the winding is concentrated to be applied, which causes damage such as unevenness and bending. Then, there is a problem that stresses such as winding pressure and vibration act to amplify the damage.

Next, to remove the static electricity from the filament F of the optical fiber, it has been proposed to spray the ions onto the entire outer peripheral surface of the bobbin B to eliminate the static electricity from the filament F wound around the body 1. There is. However, when the filaments F such as the optical fiber are wound up, the filaments F or the flanges 2,
There is a problem that static electricity generated due to friction with the inner surface of 2 and frictional resistance between the inner surface of the flanges 2 and 2 and air cannot be sufficiently removed.

Further, the bobbin B has a linear member F such as an optical fiber.
At the time of winding up, it is necessary to sufficiently remove static electricity generated by the friction of the inner surfaces of the flanges 2 and 2 by the filament F and the frictional resistance between the inner surfaces of the flanges 2 and 2 and air. In such a case, it is not possible to suppress the winding disorder of the filamentous body F, the aligned winding state is broken, and the surface layer becomes uneven and uneven winding. There is also a possible problem.

In this case, the winding disorder of the filament F is suppressed,
A normal traverse that maintains aligned winding cannot be obtained, and the surface of the filamentous body F becomes uneven winding. If it continues as it is, problems such as crossing of filaments F and entanglement frequently occur.

Further, as a measure for removing static electricity, a treatment method of spraying ions on the entire outer circumference of the bobbin B has been carried out. However, a plurality of removers (not shown) are attached to the apparatus, and the price of the product rises. Leads to.

Due to the above-mentioned problems, the evaluation of the light transmission loss is deteriorated, the optical transmission loss is increased, the measurement is inaccurate, the quality is uneven, the management labor is great, and the productivity and the workability are high. There is a problem to say.

There is also a proposal to cover the surface of the body 1 of the optical fiber flange bobbin B with the elastic sheet 11. This purpose is to relieve tension during traverse, striatum F
It aims to stabilize the quality by relieving the friction pressure between each other, relieving external stress such as heavy pressure during distribution, vibration, shock, etc.

The elastic sheet 11 used preferably has a Young's modulus of 0.3 to 15 kg / cm 2, a thickness of 0.5 to 8 mm, and a hardness of 10 to 40 in terms of durometer D hardness.
When it is 40 or more, the increase in polarization dispersion is large, and when it is 40 or less, the increase in polarization dispersion is almost zero, and when it is less than 10, the elastic sheet 11 is largely deformed, and there is a problem in durability. The reported polyethylene foam, urethane foam and the like are disclosed.

However, it is considered to be insufficient for smooth production improvement and price reduction. It is proposed that the elastic sheet 11 covering the body 1 is not adhered or adhered to the entire surface, but the following problems have not been solved.

When the elastic sheet 11 is not adhered, the filament F
The elastic sheet 11 is distorted or flattened during the traverse, and a deviation due to stress such as vibration occurs. Due to these phenomena, problems such as wrinkles larger than the thickness of the filament F and a gap between the inner surface of the flange 2 and the like occur. Therefore,
Due to the change in the elastic function-covered bullet, irregularities are formed on the winding surface of the filamentous bodies F, interruptions between the filamentous bodies F and depression into the gap occur, and normal aligned winding cannot be obtained.

On the other hand, when the elastic sheet 11 is adhered over the entire surface, an emulsion adhesive is very difficult to adhere to, and therefore a solvent or adhesive adhesive is often used for finishing. It becomes difficult to obtain uniform elasticity due to sticking mistakes and uneven coating amount. In addition, the adhesive sticks out and sticks to the linear body F. In addition, if troubles occur in the process, it is easy to peel off due to insufficient processing, and cause defects such as blind spots.
There is a problem that labor costs increase.

Avoid entanglement of filaments F, uneven winding tension and release tension, difficulty in controlling release speed, increase in management labor, decrease in productivity, which causes increase in light transmission loss due to light loss evaluation. It is to avoid problems such as.

[0020]

The linear member F, which is inserted through the passage hole 3 provided in the flange 2 of the optical fiber flange bobbin B, is arranged so as to come into contact with the peripheral edge of the opening and form an acute-angle crank shape. At that location, cracks or irregularities or bending occur in the outer cladding layer or the polymer coating layer, resulting in unevenness, bending, bending, etc. due to the applied winding tension, vibration of physical external stress after full winding, or the action of impact. The various types of damage will spread.

Next, during winding, the filament F is rubbed against the inner surfaces of the flanges 2 and 2, and the static electricity generated by the frictional resistance between the inner surfaces of the flanges 2 and 2 and air is reduced. In other words, it is intended to prevent the oscillation of the filament F from being amplified, to avoid the entanglement due to the non-aligned winding and the release tension unevenness, and to stabilize the quality.

If the coil is fully wound without being solved, the release tension becomes uneven in the rewinding process, and it becomes difficult to control the release speed by the winding speed. This problem is that the scratches, crosses, or entanglements of the filamentous body F are coated with an ultraviolet curable resin, and cracks or hardening scratches are added to the cured finish of the ultraviolet ray curing resin, resulting in deterioration of the transparency evaluation. Will result in quality degradation.

Further, by covering the entire surface of the body 1 with the elastic sheet 11 such as rubber or urethane resin foam, the tension of winding, external force during handling, etc. is alleviated and absorbed to stabilize quality and reduce loss. However, a gap is generated between the inner surface of the flange 2 and the end surface of the elastic sheet 11 due to the action of the external force.

Further, the displacement of the elastic sheet 11 and the excessive movement of free movement cause abnormal relaxation of the combined action of the winding tension, the winding weight pressure, and the external stress, and the irregularities of the filament F or the distortion of the flat shape. And / or it is to avoid these problems that scratches and tumbles occur.

Another problem is that the clad portion or the polymer coating layer portion of the filaments F, which has been cured by applying the ultraviolet curable resin, amplifies the deflection of the filaments F during traverse and causes abnormal contact between the filaments F. Occurs, the winding collapses, the entanglement changes into an abnormal winding, and complicated deformation occurs at the pole portion of the filamentous body F. It is to be noted that problems such as unevenness, rubbing, elliptical deformation, cracks, bending, bending, and cutting due to the action of vibration and impact during physical distribution during the process can be avoided and the process can be carried out smoothly.

[0026]

In order to solve the above problems, an optical fiber flange bobbin B of the present invention has flanges arranged at both ends of a straight tubular body. The flange is provided with a passage hole communicating with the tip of the slit extending in the inner diameter direction from the outer peripheral edge, and the inner peripheral surface of the passage hole has an inclined surface.

It is characterized in that a narrow groove is extended and carved from the center side toward the outer peripheral edge portion on the inner surface of the flanges arranged at both ends of the straight tubular body.

In a flange bobbin for an optical fiber in which flanges are provided at both ends of a straight tubular body whose surface is covered with an elastic sheet, a member in which a split tube and a flange divided in the middle of the straight tubular body are integrated with each other is provided. A pair is formed, and a connecting portion is formed at the other end of the cylinder in the member. On the other hand, an elastic sheet having an appropriate thickness is connected to both ends of the body in the circumferential direction to form an elastic sheet cylinder. Next, a little adhesive is applied to the connecting portion, and the elastic sheet cylinder is inserted into the split cylinder of one of the members so as to be in close contact with the inner surface of the flange.
Next, the other member is inserted into the elastic sheet cylinder from the connecting portion side of the split cylinder to connect the connections. At this time, the adhesive protrudes from the peripheral connection portion, and the molded body surface and the inner surface of the elastic sheet cylinder are bonded to each other.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

First, a first embodiment of the present invention will be described with reference to FIGS. 2, 3, 4, and 5. FIG. 2 shows an optical fiber flange bobbin B having a right cylindrical body 1
At both ends of the disk, there are provided two slits 5 at 180 ° intervals and disc-shaped flanges 2 and 2 in which communicating holes 3 are arranged on an extension line of the slit 5, and the flange 2 having the slit 5 and the passing hole 3 is provided. It is a front view which connected the auxiliary ring 4 to the outer side surface. The parts having the same functions as those of the conventional one are indicated by the same symbols. In addition, duplicate explanations may be omitted.

Flange bobbin B for optical fiber of the present invention
Is for winding a filament F of an optical fiber cable in which a coating layer is formed on the outer periphery of the optical fiber.

The flanges 2 and 2 are designed in consideration of weight reduction, thermal deformation, shape change, rotational balance during winding, etc. For example, half of the total thickness of the flange 2 has a uniform thickness, Half the convex streaks 21 are formed evenly, and in order to close the filamentous body F if it can be wound stably, at the appropriate position of the flange 2 on one side, from the outer peripheral edge that guides the filamentous body F to the passage hole 3 Has a slit 5 of a constant width that extends linearly to the center, and has a circular small-diameter hole that penetrates the thickness of the flange 2 at a right angle at the center-side tip thereof, and is constant near the inner peripheral wall surface thereof. Reinforcing convex streaks 21 are provided at spaced positions. See the enlarged front view of the passage hole 3 of FIG. 3 with the auxiliary ring 4 of FIG. 2 removed.

Then, three circular passage holes each having a mortar-shaped inclined surface 31 gradually increasing in depth from the top of the convex streak 21 toward the inner peripheral wall surface of the small diameter hole are provided. It should be noted that the periphery and corners of the passage hole 3 are all finished with a curved surface. 3, a cross-sectional view of FIG. 4 taken along section line AA of FIG. 3 and of FIG.
See the cross-sectional view along section line CC of FIG.

The passage hole 3 is visually closed up to the central position of approximately half of the small diameter hole due to the thickness of the elastic sheet 11 covering the surface of the body 1. See the enlarged front view of the passage hole 3 of FIG. 3 with the auxiliary ring 4 of FIG. 2 removed.

This is an optical fiber flange bobbin B for winding the filamentous body F in which an auxiliary ring 4 concentric with the bobbin B is connected to the outer surface of the flange 2 having the passage hole 3.

In winding the filament F on the bobbin B,
The filamentous body F inserted through the main passage hole 3 has a stable arrangement with the end portion F1 arranged outside the flange 2 and the end portion F2 inside the flange 2. In the conventional product, the filamentous body F does not have a drooping arrangement of the end portions F1 and F2 in which the passage holes 3 are inserted.
Further, in a front view and a plan view of the insertion state of the linear body F through the main passage hole 3, the ends F1 and F2 of the linear body F are arranged in a gentle curve to form a crank shape having an acute angle of the conventional product. Can be avoided.

Moreover, by providing the inclined surface 31 in the main passage hole 3, there is no sharp bending or bending angle of the filament F as in the conventional product. Further, the filamentous body F can be stably supported by the surface portion of the inclined surface 31, and the damage such as unevenness and bending at the contact portion is drastically reduced.

The difference between the two is the unevenness and cracks in the clad portion on the filament F generated in the conventional through hole 3. Further, problems such as bending and bending up to the core portion can be avoided. Also,
There is no work to pass the filamentous body F through the passage hole 3, and the slit 5 facilitates the operation, which is effective in improving the production.

Next, a second embodiment of the present invention will be described with reference to FIGS. 6, 7 and 8. In the passage hole 3 of this embodiment, the inclination angle of the inclined surface 31 of the previous embodiment is halved gently so that the arrangement of the end portions F1 and F2 of the filamentous body F can be made gentler. . This means that, among the convex streaks 21 that are provided around the convex streak 21 only in the range where the filamentous body F is inserted.
Is to remove. 6 is a front view, FIG. 7 is a cross-sectional view taken along line D-D in FIG. 6, and FIG.
See cross sectional view along E.

Insertion of the ends F1 and F2 of the filament F is
The contact surface spreads over the inclined surface 31 of the passage hole 3 to provide a more stable arrangement. Therefore, the end portion F of the filamentous body F that passes through the passage hole 3
1. The angle of the end portion F2 is relaxed, and the occurrence of damage such as unevenness and bending at the corner contact portion of the passage hole 3 is improved.

The insertion of the filament F is performed from the end F1 to the end F2.
It is possible to carry out either of the case of the direction of or the direction of the end portion F2 to the end portion F1. The elastic sheet 11 has the same arrangement as that of the above-described embodiment.

Next, a third embodiment of the present invention will be described with reference to FIGS. The passage hole 3 of this embodiment limits the arrangement state of the end portions F1 and F2 of the filamentous body F. In other words, when the outer diameter of the end portion F1 of the filament F of the auxiliary ring 4 is the same as the outer diameter of the filament F of the body 1 or the outer diameter of the auxiliary ring 4 is the elastic sheet 11. It was limited to the case of a small outer diameter corresponding to the thickness of. (Not shown)

The design by limiting the insertion direction of the filament F is
The basic shape forms an elliptical shape similar to the above-described embodiment. As a result, the used area of the inclined surface 31 is reduced, and the warp strength of the flange 2 can be improved. Therefore, the size of the passage hole 3 is reduced, and it is also effective in preventing distortion due to thermal deformation and winding pressure. Further, the same gradual insertion of the filamentous body F as described above can be obtained, and factors such as bending, bending, and other quality deterioration are avoided. See the front view of FIG. 9 and the cross-sectional view of FIG. 9 taken along section line GG.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. 11 and 12. The passage hole 3 of this embodiment has the arrangement state of the end portions F1 and F2 of the filamentous body F,
This is a design in which the winding outer diameter of the auxiliary ring 4 is smaller than the outermost diameter of the body 1 so that the entire passage hole 3 is exposed. (Not shown)

A small-diameter hole through which the passage hole 3 penetrates has a shape equal to or smaller than the incision width of the slit 5, and avoids subtle distortion and warpage due to environmental temperature, heavy pressing of the winding amount, and the like. . It is miniaturized as in the above embodiment,
The inclined surface 31 is arranged on the center side of the bobbin B in an offset state. Therefore, even if the end portion F1 of the filamentous body F hangs down across the passage hole 3, the end portion F1 abuts on the inner peripheral edge portion of the passage hole 3 and avoids the problem of deterioration in quality such as unevenness and flatness. See FIG.

The thickness of the elastic sheet 11 closes two-thirds of the passage hole 3, but the tension in the hanging direction is applied to the winding start end of the filamentous body F, and the inner peripheral edge portion of the passage hole 3 is applied. To avoid contact. FIG. 13 is a vertical sectional view taken along section line H-H in FIG. Of course, each corner contact and each acute-angled portion form a curved surface.

Next, a fifth embodiment of the present invention will be described with reference to FIGS. The passage hole 3 of this embodiment has the arrangement state of the end portions F1 and F2 of the filamentous body F,
It is assumed that the flange 2 of the conventional optical fiber flange bobbin B is used.

The directions in which the end portions F1 and F2 of the filamentous body F are inserted are limited, the design is made compact as in the above embodiment, and the improvement of the strength of the flange 2 is visually observed. This passage hole 3
Is a mortar-shaped inclined surface 31 on which the convex streak 21 is not provided. The inclined surface 31 is formed as a gently sloping surface so as to be as parallel as possible to the end portion F1 of the filamentous state F, at a position corresponding to the insertion direction of the end portion F1 of the filamentous state F. As a result, as in the conventional case, the filamentous body F can be inserted into a crank shape, and damage problems such as unevenness, flattening, and bending deformation can be prevented. See FIG.

The inclined surface 31 may be an inner peripheral surface that is orthogonal to the thickness of the flange 2 with the inclined surface 31 on the opposite side in the insertion direction of the end portion F1 of the filamentous state F. If necessary, it may be an inclined surface that conforms to the insertion direction of the ends F1 and F2 of the filamentous body F. See the cross-sectional view of FIG. 14 taken along section line I-I of FIG.

When the linear body F is inserted through the passage hole 3, the linear body F is arranged so as to have a gentle curve, and the end portion F1 of the linear body F is arranged.
Even if the direction of changes to the end portion F11, the quality does not deteriorate.

The filamentous body F such as an optical fiber is wound and stored,
Products that can be easily stored, handled, and distributed. The structure is not particularly limited.

Therefore, the end portions F1 and F2 of the filamentous body F which is inserted and wound into the passage hole 3 provided in the flange of the optical fiber flange bobbin B according to the present invention become the filamentous body F which is wound and rewound. The applied tension, external stress such as vibration and shock during distribution or handling in a fully wound state, and these stresses act to apply the ultraviolet curable resin on the outer surface of the linear body F to finish the curing. It is possible to prevent problems such as cracks and irregularities in the coating layer, that is, the clad portion, a concave flattened shape in the polymer coating layer, and a flattened filament F.

Further, it is possible to prevent the core portion of the filamentous body F from being damaged by bending, bending or the like. Of course, it is unlikely that it will affect the disconnection.

Further, the filamentous body F such as an optical fiber wound around the auxiliary ring 4 is stably secured as a spare for measuring a light-transmitting property (also referred to as transmission loss evaluation) for quality evaluation or for connection processing. As a result, stable evaluation measurement without loss and connection processing can be performed smoothly.

The cut end of the slit 5 is provided with a wide guide portion 51 such as a fan shape so that the filamentous body F such as an optical fiber can be easily introduced into the passage hole 3.

The shape should be designed in consideration of the physical properties of the filament F to be wound up, the standard dimensions, the thickness of the flange 2 and the like. In particular, it is necessary to pay attention to the width and each dimension of the chamfer of the corner portion, and therefore the present embodiment is not limited to this embodiment. As a result, there is no need for the labor of passing the filamentous body F through the passage hole 3, and there is a possibility of automatic winding work.

Next, a sixth embodiment of the present invention will be described with reference to FIG. This embodiment is intended to reduce static electricity generated in the optical fiber flange bobbin B, and is linear on the inner side surfaces of the flanges 2 and 2 disposed at both ends of the straight tubular body 1 from the center side to the outer peripheral edge portion. The thin grooves 21 extending in the direction are uniformly engraved in a radial pattern.

The width of the narrow groove 21 is, for example, 1 mm with respect to the thickness of the linear body F of 0.025 mmφ. Radius 0.5
A circular arc of mm is used, and the facing edge corners of the groove are curved. (Not shown)

Therefore, the facing edge corners of the groove are finished in a curved shape because external stress such as winding pressure and vibration is applied to the linear body F and the shape of the groove edge is transferred to the clad layer of the narrow groove 21. It is possible to avoid crack phenomenon and concave deformation.

The ratio of the engraved area of the fine groove 21 to the engraved area is preferably more than 50%. When the convex streaks are mainly formed, the depressions and projections are transferred and formed on the surface layer of the filamentous body F by the pressing, and the loss of the translucency evaluation is not reduced.

By uniformly engraving the fine grooves 21, the frictional resistance of contact with the linear body F in the traverse is reduced, and the static electricity generated on the bobbin B due to rubbing friction is reduced.

Further, the fine groove 21 is an engraving which does not cause tension unevenness due to catching or fitting of the linear body F during traverse or release.

Since the narrow groove 21 has a larger area on the outer peripheral side than on the inner peripheral side of the flanges 2 and 2, long and short narrow grooves may be mixed evenly if necessary. Further, the spiral shape may be either clockwise or counterclockwise. Therefore, there is no particular limitation as it is possible to introduce design elements.

Further, by uniformly engraving the fine grooves 21, the frictional resistance due to the contact between the linear body F and the inner surfaces of the flanges 2 and 2 is reduced during winding, releasing and rewinding. The frictional resistance with the inner surface of the flange is reduced, the occurrence of static electricity is prevented in advance, and the fine deflection, swinging, and tension unevenness of the linear body F during winding can be suppressed, so that the aligned winding can be smoothly performed. .

Next, a seventh embodiment of the present invention will be described with reference to FIG.

FIG. 1 showing the entire optical fiber flange bobbin B has a pair of disc-shaped flanges 2 and 2 whose outer side is the side where the convex streak 21 is disposed and whose inner side is the plane side. A member (a) (a) is formed at the center of the body, in which the axial centers of the body parts obtained by dividing the straight tubular body 1 into two are connected in the middle, and the circumferential portion of the other end of the body part is connected to the connecting portion 12. To provide.

The structure of the connecting portion 12 is such that the circumferential portions of the other end of the body 1 can be attached and detached. For example,
A concave fitting portion of an appropriate depth having a large diameter only inside one half of the thickness of the circumferential portion on the body portion (a) side is provided on the circumferential portion on the other body portion (a) side, By forming a convex fitting portion having a small diameter only on the outside of one half of the thickness and fitting both concave and convex fitting portions, the surfaces are connected flush with each other to form the body 1. (Not shown)

The elastic sheet 11 is adhered to the body (a)
(A) A solvent-based adhesive is applied to the entire circumferences of the concave and convex fitting portions on both sides, and a tubular body made of an elastic sheet 11 prepared in advance is formed on the inner surface of the flange 2 of the body (a). Insert so that they touch each other. In this case, no adhesive is applied inside the cylinder of the elastic sheet 11.

Then, the elastic body 11 is inserted into the cylindrical body of the elastic sheet 11 from the other side of the body (a) to which the adhesive is applied, and the concavo-convex fitting portion is fitted to form the body 1. This fitting portion is referred to as the connecting portion 12. Then, the other end of the elastic sheet 11 is inserted and attached to the inner side surface of the flange 2 in a close contact state as described above.

The elastic body of the elastic sheet 11 mounted is the body 1.
Adhesive 1 that covers the entire surface and protrudes along the connecting portion 12
By 3 a circumferential adhesive bond is achieved. See FIG. Please refer to FIGS. 3 to 15 for understanding the arrangement of the elastic sheet 11.

For example, 5 to 40 times foaming made of polyethylene resin and having a coating layer formed on the surface thereof. Thickness is 1 to 7 mm, width is 0 to 20% increase between flanges. Body circumference is 0 to 1
It is considered that 0% or the thickness is reduced.

Further, the function of the elastic sheet 11 is that the line of the optical fiber or the like is formed by arranging one or two layers in consideration of productivity such as thickness, tension, and winding amount of the filamentous body such as the optical fiber, and stability of the product. It is preferable that the thickness of the strip is half flat.

The cylinder of the elastic sheet 11 has a width length slightly longer than that between the flanges 2 and 2, and a circumference length slightly shorter than the entire circumference of the body 1. It is formed so as to be in contact with each other. The clothing on the body 1 is prevented from idling or sliding.

Further, the tubular shape of the elastic sheet 11 may be such that the connecting line between its ends is not only parallel to the axis of the bobbin but also spiral, and the like. Mold so that they contact each other. Also, the elastic sheet 1
The cross section of 1 has a rhombic cross section, which is formed into an oblique shape,
It may be formed such that the slanted surfaces are in contact with each other, and the ends thereof are joined by heat or a solvent-based adhesive. It is not particularly limited.

The elastic sheet 11 is made of various resins such as synthetic rubber, polypropylene, polystyrene, polyethylene, polyester, urethane, nylon, acrylic resin and silicone resin, or copolymers thereof.
Alternatively, a foam or the like in which the hardness of these resins is adjusted is used. Disposable materials are preferred.

The covering of the elastic sheet 11 is not a complete bond. The entire width of the body 1 between the flanges 2 and 2 is offset,
Twisting, sinking of the linear body, misalignment, etc. occur appropriately, and delicate movements of appropriately blocking are required, and this should be emphasized.

By this elastic sheet 11, even if the tension and the winding weight pressure of the filamentous body F during traverse and the external stress such as vibration and impact due to the distribution and handling in the fully wound state are combined, it does not occur. Natural distortion and bias can be prevented.

Further, since the elastic sheet 11 is kept in contact with the inner side surfaces of the flanges 2 and 2, there is no gap in which the filament F falls, and the collapse of the aligned filaments is avoided. As a result, the flange is not warped and deformed abnormally, and the quality is stable.

When the bobbin B is increased in size for additional winding, a straight tubular body having the same outer diameter as that of the body 1 may be connected and the widened tubular body of the elastic sheet may be similarly covered. .

[0080]

As described above, the flange bobbin for an optical fiber of the present invention can be used for the production and processing steps such as winding and rewinding, as well as the linear body such as the optical fiber for physical distribution steps such as packing and transportation. Various damages can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic side view of an optical fiber flange bobbin according to an embodiment of the present invention.

FIG. 2 is a schematic front view of FIG.

FIG. 3 is a schematic front view showing a passage hole portion.

4 is a cross-sectional view taken along the section line AA of FIG.

5 is a cross-sectional view taken along the section line CC of FIG.

FIG. 6 is a schematic front view showing a modified example of a passage hole portion.

7 is a cross-sectional view taken along the section line DD of FIG.

8 is a cross-sectional view taken along the section line EE in FIG.

FIG. 9 is a schematic front view showing a modified example of a passage hole portion.

10 is a cross-sectional view taken along the section line GG of FIG.

FIG. 11 is a schematic front view showing a modified example of a passage hole portion.

12 is a vertical sectional view taken along a sectional line HH in FIG.

FIG. 13 is a schematic front view showing a modified example of a passage hole portion.

FIG. 14 is a cross-sectional view taken along the section line II of FIG.

FIG. 15 is a schematic view showing an inner surface of a flange of an optical fiber flange bobbin.

FIG. 16 is a schematic side view showing a conventional optical fiber winding package.

17 is a schematic front view of FIG.

FIG. 18 is an enlarged plan view of a passage hole portion of FIG.

[Explanation of symbols]

B ... Flange bobbin for optical fiber, F: filaments such as optical fibers, 1 ... the body, 2… Flange, 3 ... Passage hole, 4… Auxiliary ring, 5 ... Slit, 11 ... Elastic sheet, 21 ... narrow groove 31 ... Slope.

Claims (3)

[Claims] 1. A flange bobbin for an optical fiber in which flanges are arranged at both ends of a straight tubular body, the flange being provided with a passage hole communicating with an end of a slit extending in an inner diameter direction from an outer peripheral edge. An optical fiber flange bobbin having an inclined inner surface. 2. The light according to claim 1, wherein a thin groove is provided on the inner surface of the flange on the side where the straight tubular body is disposed so as to extend from the center side toward the outer peripheral edge portion. Flange bobbin for fiber. 3. In a flange bobbin for an optical fiber in which a flange is provided at both ends of a straight tubular body whose surface is covered with an elastic sheet, a split tube and a flange which are divided in the middle of the straight tubular body are integrated. A pair of members is formed, and a connecting portion is formed on the other end of the cylinder in the member. On the other hand, an elastic sheet having an appropriate thickness is connected to both ends of the body in the circumferential direction to form an elastic sheet cylinder. Next, a little adhesive is applied to the connecting portion, and the elastic sheet cylinder is inserted into the split cylinder of one of the members so as to be in close contact with the inner surface of the flange. Next, the other member is inserted into the elastic sheet cylinder from the connecting portion side of the split cylinder to connect the connections. At this time, the adhesive protrudes from the peripheral connection portion, and the molded body surface and the inner surface of the elastic sheet cylinder are bonded to each other.