JPH09329718A - Optical fiber delivery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical fiber delivery device which prevent the increase of transmission loss or the breakage of an optical fiber during the delivery of the optical fiber. SOLUTION: The optical fiber 2 is wound around a bobbin 1 having a tapered cylindrical part 1c and this bobbin 1 is mounted at a fixing base 4 by a coil spring 3. The bobbin 1 is supported in the state of allowing the free inclination of the bobbin 1. At the time of delivering the optical fiber 2 in the direction perpendicular to the fixing base 4 from the end on the side where the diameter of its taper increases, the coil spring 3 is bent by the tension of the optical fiber 2, by which the center line 5 of the bobbin 1 is inclined to the side opposite to the delivery position of the optical fiber 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber feeding device for feeding an optical fiber from a bobbin. For example, it is used to feed an optical fiber from a bobbin, which is connected to a moving object and controls the moving object by wire induction, but is not limited to this application.

[0002]

2. Description of the Related Art An optical fiber feeding device is connected to a moving object such as a missile and is used for controlling the moving direction of a moving object by wire guidance. It is necessary to prevent breakage of the optical fiber even when the optical fiber is delivered at high speed.

As described in Japanese Patent Laid-Open No. 63-1680, a conical trapezoidal bobbin (bobbin) for feeding an optical fiber has a ring-shaped projection at the end on the small diameter side and is wound. It is known to prevent cutting due to the last remaining portion of each layer of an optical fiber slipping off at once.

However, since the optical fiber fed out from the root of the ring-shaped projection has a small bending diameter and a large tension, as it is fed out at a higher speed, transmission loss increases or, in an extreme case, breakage occurs. There is a fear. The optical fiber goes over the ring-shaped protrusion and is fed while rubbing the periphery of the ring-shaped protrusion, so the optical fiber fed from the root of the ring-shaped protrusion depends on the radius of curvature of the ring-shaped protrusion and the smoothness of the surface. The tension is higher than other parts. The instantaneous tension due to the catch on the ring-shaped protrusion increases as the speed increases.

As described in Japanese Patent Laid-Open No. 3-199900, the diameter of the spiral expansion ring attached to the end of the cylindrical bobbin around which the optical fiber is wound is reduced as the optical fiber is fed. Keeps the diameter of the spiral expansion ring close to the diameter of the cable pack (wound state of the optical fiber), minimizing the expansion effect and increasing the tension of the optical fiber by friction with the spiral expansion ring. Those that prevent things are known. Specifically, the spiral expansion ring is made of a material that wears away as the optical fiber is paid out, or one whose diameter is mechanically changed by an iris or the like is used.

However, the mechanism for adjusting the diameter of the spiral expansion ring in accordance with the winding amount becomes complicated. Mechanical adjustment of the diameter of the expansion ring to be as high as the winding volume requires monitoring the winding volume during payout.
Further, in order to prevent the diameter of the ring from becoming too small and the winding from collapsing, precise control is required because the optical fiber has a small diameter. Even if it is made of a material that wears out as the optical fiber is fed, it is difficult to select a material that wears out exactly in accordance with the winding amount.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and does not use an intricate mechanism to prevent an excessive tension from being applied to the optical fiber at the time of paying out, and during the paying-out of the optical fiber. It is an object of the present invention to provide an optical fiber feeding device that prevents an increase in transmission loss or breakage of an optical fiber.

[0008]

According to a first aspect of the present invention, in the optical fiber payout device, the optical fiber has a tapered barrel and at least the light wound around the tapered barrel. It is characterized in that it has a bobbin for feeding the fiber from the end of the taper on the large diameter side, and a supporting means for supporting the bobbin in a freely tiltable state.

According to a second aspect of the invention, in the optical fiber feeding device according to the first aspect, the supporting means is a connecting and fixing member having elasticity.

According to a third aspect of the present invention, in the optical fiber payout device according to the first aspect, the bobbin has an axial hole on the center line of the bobbin, and the supporting means has a groove on the outer circumference. The connecting rod has the inner diameter of the shaft hole larger than the outer diameter of the groove, and the shaft hole engages with the groove.

According to a fourth aspect of the present invention, in the optical fiber payout device according to the first aspect, the supporting means has a connecting rod having a spherical tip portion, and the bobbin is a bobbin. It is characterized in that it has a spherical seat for receiving the tip portion on the center line and surrounding the tip portion.

According to a fifth aspect of the present invention, in the optical fiber payout device according to the first aspect, the bobbin has a connecting rod on the center line of the bobbin, and the supporting means includes the connecting rod. It is characterized by having a bearing portion for receiving the tip.

According to a sixth aspect of the present invention, in the optical fiber feeding device according to the first aspect, the supporting means has a connecting rod, and the bobbin has the connecting rod on the center line of the bobbin. It is characterized by having a bearing portion for receiving the tip.

According to a seventh aspect of the present invention, in the optical fiber feeding device according to any one of the fifth to sixth aspects, the supporting means has a fixing base, and a tip portion of the connecting rod is provided. It is characterized in that the bearing and the end of the bobbin on the fixed base side and the fixed base are magnetically attracted to each other.

According to an eighth aspect of the present invention, in the optical fiber feeding device according to any one of the third to seventh aspects, the supporting means is provided around the central axis of the bobbin during feeding of the optical fiber. It is characterized in that it has a rotation preventing means for preventing rotation.

According to a ninth aspect of the invention, in the optical fiber feeding device according to the eighth aspect, the supporting means has a fixed base, and the rotation preventing means is the fixed base or the bobbin. It is characterized in that it has at least one pin arranged circumferentially on one of the ends on the fixed base side and at least one pin receiving hole arranged circumferentially on the other end.

[0017]

1 is an explanatory view of a first embodiment of an optical fiber feeding device of the present invention. In the figure, 1
Is a bobbin, 1a is a collar portion on the fixed base side, 1b is a cylindrical body portion, 1
Reference numeral c is a tapered barrel portion, 1d is a payout side flange portion, 2 is an optical fiber, 3 is a coil spring, 4 is a fixed base, and 5 is a center line. The bobbin 1 and the part of the optical fiber 2 in the wound state are not the cross section itself but the outline of the cross section.

In the optical fiber feeding device of this embodiment, an optical fiber 2 is wound around a bobbin 1 having a tapered body portion 1c, and this bobbin 1 is attached to a fixed base 4 by a coil spring 3. It is a thing. Bobbin 1
The center line 5 of the bobbin 1 is supported so that it can be tilted freely. When the optical fiber 2 is paid out in the direction parallel to the center line 5 from the end on the side where the taper diameter increases, the tension of the optical fiber 2 causes the coil spring 3 to bend, so that the center line 5 of the bobbin 1 moves to the optical fiber 2 It is designed to incline to the side opposite to the feeding position.

The bobbin 1 has a fixed base side flange portion 1 on the fixed base 4 side.
The cylindrical body portion 1b is provided with a portion a, and the tapered body portion 1c having a truncated cone shape is adjacent to the cylindrical body portion 1b, and the delivery side flange portion 1d is provided on the delivery side of the optical fiber 2. These respective parts are functionally divided parts of the bobbin 1, and may be integrally molded, or may be separately formed and then combined together. The feeding-side collar portion 1d is also tapered, and the feeding-side collar portion 1d is substantially the end of the tapered barrel portion 1c on the side where the optical fiber 2 is fed, but at the portion where the optical fiber 2 is not wound. is there. It is desirable to provide an appropriate roundness over a predetermined range between the inclined surface and the end surface of the feeding side flange portion 1d.

One end of the coil spring 3 is attached to the fixed base 4. In the illustrated example, the other end of the coil spring 3 is fixedly attached to the end face of the fixed base side flange portion 1a about the center line 5 of the bobbin 1, but it may be attached inside the bobbin 1 not shown. Good. The coil spring 3 supports the bobbin 1 with the bobbin 1 tilted freely. It does not have to be coiled, and may be a columnar connecting and fixing member having elasticity such as rubber or metal spring.

The optical fiber 2 is wound around the outer circumferences of the cylindrical body portion 1b and the tapered body portion 1c in a multi-layered manner in an aligned state, as in the prior art. The second optical fiber 2 is arranged on the first layer of the optical fiber 2 so as to be placed on an adjacent portion of the optical fiber 2 of the first layer with a pitch shifted by half the diameter of the optical fiber 2. In a state in which the optical fibers of the third layer are arranged on the adjacent portion of the optical fiber 2 of the second layer, and the optical fibers of the third layer are reversely displaced by the same pitch. After being wound, this state is repeated in subsequent layers. After the aligned winding is completed, it is desirable that the wound layer be thin and lightly glued. The cylindrical body 1b may be omitted, and the tapered body 1c may be adjacent to the fixed base side flange 1a.

Since the optical fiber 2 is also wound around the tapered barrel portion 1c, the width of one layer is an integer of the diameter of the optical fiber 2 each time the layer of the optical fiber 2 is placed on the upper layer side due to such alignment winding. It will be doubled. In this way, the tapered barrel portion 1 is formed so as to exactly match the width of the layer of the optical fiber 2 which increases discretely.
Designing the taper angle α of c is preferable because it facilitates aligned winding.

FIG. 2 is an explanatory view of the operation of the optical fiber feeding device shown in FIG. FIG. 2A is an explanatory diagram of a first state while the optical fiber is being extended, and FIG. 2B is an explanatory diagram of a second state. In the figure, the same parts as those in FIG. Reference numeral 11 is a feeding position. FIG.
In the first state shown in (A), the feeding position 11
Is on the payout side flange portion 1d, and the tension of the optical fiber 2 causes the bobbin 1 to tilt downward with respect to the line perpendicular to the fixed base 4 on the side opposite to the payout position 11 of the optical fiber 2.
The center line 5 also tilts downward. Subsequently, when the optical fiber 2 is unwound, the unwinding position 11 rotationally moves in one direction on the outer circumference of the unwinding side collar portion 1d, and along with this movement, the center line 5 of the bobbin 1 is moved by the tension of the optical fiber 2. The direction of rotation and tilt changes.

In the second state shown in FIG. 2 (B),
The payout position 11 wraps around the lower part of the payout side flange portion 1d, and the tension of the optical fiber 2 causes the bobbin 1 to incline upward with respect to the line perpendicular to the fixed base 4 opposite to the payout position 11 of the optical fiber 2. The center line 5 also tilts upward. When the optical fiber 2 is continuously extended, the extended position 11
2 further rotationally moves on the outer circumference of the feeding-side collar portion 1d, and the state shown in FIG. 2A is again obtained.

That is, the bobbin 1 and its center line 5
Oscillates around an imaginary center point on the coil spring 3 side as a fulcrum. This is similar to precession, but unlike precession, bobbin 1 does not rotate about centerline 5. It is desirable that the centerline 5 of the bobbin 1 be tilted at a maximum angle of about a taper angle α so that the optical fiber 2 is not likely to come off from the payout side collar portion 1d in a gathered state.

With the above configuration, when the optical fiber 2 is paid out, at the payout position 11 and in the vicinity thereof,
The optical fiber 2 can be kept substantially straight. The bobbin 1 is tilted in a direction in which the optical fiber 2 can reduce overrunning of the end portion on the payout side. Even with the optical fiber 2 rewound from the side close to the delivery side, the optical fiber 2 does not rise up at a steep angle and cross over the end unlike the conventional case. It is possible to prevent the optical fiber 2 from being caught in the bobbin 1 or reduce this, and it is possible to prevent the optical fiber 2 from breaking. Further, since the bending diameter does not become small, it is possible to prevent an increase in transmission loss during the payout of the optical fiber 2.

The bobbin 1 may have a dense and uniform structure inside, but the internal members are minimized so as not to give a large pullback force to the optical fiber 2 that is fed out.
It is desirable to make it as light as possible.
A synthetic resin such as ABS resin or Styrofoam can be used. In order to prevent an increase in transmission loss due to bending and tension, it is desirable that the outer peripheral surfaces of the tapered barrel portion 1c and the payout side flange portion 1d be smooth, and
It is desirable that the feeding-side brim portion 1d be appropriately rounded.

FIG. 3 is an explanatory view of a second embodiment of the optical fiber feeding device of the present invention. 1 and 2 in the figure
The same reference numerals are given to the same parts as those described above, and the description is omitted. Two
1 is a bobbin, 21a is a partition wall, 21b is a shaft hole, 22 is a connecting rod, and 22a is a groove. In this embodiment, the bobbin 21
The shaft hole 21b provided on the center line 5 of the above and the groove 22a provided on the connecting rod 22 are engaged with each other.

The bobbin 21 has a cavity centered on the center line 5, and a partition 21a is located in the center of the cavity in the direction of the center line 5, and the shaft hole 21 is formed at the center of the partition 21a.
b is open. Since the inner diameter of the shaft hole 21b is larger than the outer diameter of the groove 22a, the bobbin 1 makes the center line 5 of the bobbin 1 in a state in which the bobbin 1 can be freely tilted, and the bobbin 1 is almost attached to the connecting rod 22 fixed vertically to the fixing base 4. The bobbin 21 is supported at one point and is concentric with the connecting rod 22.

As a result, similar to the first embodiment shown in FIG. 1, when the optical fiber 2 is paid out in the direction parallel to the connecting rod 22 from the end on the side where the taper diameter increases, the optical fiber 2 The center line 5 of the bobbin 21 is moved by the tension of the optical fiber 2
Will be inclined to the opposite side of the feeding position 11. The angle of inclination is determined by the contact between the edges of the openings at both ends of the bobbin 21 and the connecting rod 22. When the inner diameter of the shaft hole 21a is larger than the outer diameter of the connecting rod 22, it is easy to fit the shaft hole 21a into the groove 22a, but on the contrary, it is easy to come off,
The inner diameter of the shaft hole 21a may be made slightly smaller than the outer diameter of the connecting rod 22, and the fitting may be performed by press fitting. The outer shape of the bobbin 21 and how to determine the taper angle are the same as those in the first embodiment described with reference to FIG.

FIG. 4 is an explanatory view of a third embodiment of the optical fiber feeding device of the present invention. 1 and 2 in the figure
The same reference numerals are given to the same parts as those described above, and the description is omitted. 3
1 is a bobbin, 31a is a fixed base side flange portion, 31b is a recessed portion, 3
1c is a receiving seat, 32 is a connecting rod, and 32a is a tip.
In this embodiment, the receiving seat 31c provided on the center line 5 of the bobbin 31 and the spherical tip portion 32a of the connecting rod 32 are fitted together.

A spherical body is attached to the tip of the connecting rod 32 to have a spherical tip portion 32a having a diameter larger than the outer shape of the connecting rod. Collar part 3 on the fixed base of bobbin 31
1a has a substantially conical recess 31b, and a receiving seat 31c is provided at the tip thereof. The receiving seat 31c is a spherical concave portion having a diameter slightly larger than the spherical diameter of the tip end portion 32a, and surrounds the tip end portion 32a from the opposite side of the connecting rod 32. Therefore, the receiving seat 31c surrounds the tip end portion 32a. It can rotate smoothly. The bobbin 31 can be tilted freely and is supported by a connecting rod 32 fixed vertically to the fixing table 4 at almost one point, and the tip 32a is prevented from coming off while the optical fiber 2 is being fed. There is.

As a result, similar to the first embodiment shown in FIG. 1, when the optical fiber 2 is paid out in the direction parallel to the connecting rod 32 from the end portion on the side where the taper diameter increases, the optical fiber 2 With the tension of, the center line 5 of the bobbin 31 moves the optical fiber 2
Will be inclined to the opposite side of the feeding position 11. The angle of inclination is determined by at least one of the contact between the inner wall surface of the recess 31b of the bobbin 31 and the connecting rod 32 and the contact between the fixed base side flange 31a and the fixed base 4. The outer shape of the bobbin 31 and how to determine the taper angle are the same as those in the first embodiment described with reference to FIG.

FIG. 5 is an explanatory view of a fourth embodiment of the optical fiber feeding device of the present invention. 1 and 2 in the figure
The same reference numerals are given to the same parts as those described above, and the description is omitted. Four
1 is a bobbin, 41a is a flange part on the fixed base side, 42 is a connecting rod, 4
3 and 45 are magnets, and 44 is a pivot bearing. In this embodiment, the connecting rod 42 provided on the center line 5 of the bobbin 41 is used.
Is brought into contact with the recess of the pivot bearing 44 on the fixed base 4 side, and the bobbin 41 and the fixed base 4 are magnetically attracted to each other, thereby supporting the bobbin 41 in a freely tiltable state.

The bobbin 41 is supported by a pivot bearing 44 at substantially one point while the bobbin 41 can be freely tilted, and the tip end of the connecting rod 42 is moved by a magnetic attraction force while the optical fiber 2 is being paid out. It is designed so that you cannot get out. The tip end of the connecting rod 42 and the pivot bearing 44 are magnets and attract each other. Further, the peripheral edge of the fixed base side flange portion 41a is chamfered so as to come into planar contact with the fixed base 4, and the magnet 43 is arranged and attached to this portion in a ring shape. Also on the side, the magnet 45 is arranged and attached in a ring shape.

As a result, similarly to the first embodiment shown in FIG. 1, when the optical fiber 2 is fed out in the direction perpendicular to the fixed base 4 from the end on the side where the taper diameter increases, the optical fiber 2 The center line 5 of the bobbin 41 is tilted to the side opposite to the payout position 11 of the optical fiber 2 by the tension. The angle of inclination is determined by the contact between the peripheral edge of the fixed base side flange portion 41a and the fixed base 4. The outer shape of the bobbin 41 and how to determine the taper angle are the same as those in the first embodiment described with reference to FIG.

Either one of the tip portion of the connecting rod 42 and the pivot bearing 44 may be replaced with a magnetic material such as iron attracted by a magnet. The same applies to the magnets 43 and 45. For example, the fixed base 4 can be made of iron.

As shown in the figure, when the fixing table 4 is horizontal and the optical fiber 2 is extended only in the vertical direction,
Even if the magnets 43, 45 do not attract the bobbin 4
The tip portion of the connecting rod 42 does not come off only by its own weight of 1,
Further, when the optical fiber 2 is extended, the center line 5 of the bobbin 41 can be inclined to the side opposite to the extended position 11 of the optical fiber 2 by the tension of the optical fiber 2. If the attraction force of the magnets 43, 45 and the like is sufficiently strong, the fixing table 4 is not horizontal, and the optical fiber 2 can be extended even in a direction other than the vertical direction.

FIG. 6 is an explanatory view of the fifth embodiment of the optical fiber feeding device of the present invention. In the figure, the same parts as those in FIG. Reference numeral 51 is a bobbin, 51a is a fixed base side flange portion, 51b is a concave portion, 52 is a connecting rod, and 53 is a pivot bearing. In this embodiment,
Compared to the fourth embodiment described with reference to FIG. 5,
The connection rod and the pivot bearing are arranged in reverse.

A conical recess 51b is provided on the center line 5 of the collar 51a on the fixed base side of the bobbin 51, and a pivot bearing 53 is attached to the top of the concave 51b.
2 is vertically fixed. Although the tip ends of the pivot bearing 53 and the connecting rod 52 are magnets, either one may be made of a magnetic material attracted by the magnet. The other configuration and the feeding operation of the optical fiber 2 are the same as those in the fourth embodiment described with reference to FIG.

In the second embodiment described with reference to FIG. 3 and the third embodiment described with reference to FIG. 4, the bobbin is supported in a freely tiltable state. It is possible to arrange the members in reverse. In FIG. 3, the relationship between the shaft hole 21b and the groove 22a can be reversed. That is, instead of providing the partition wall 21a,
It is possible to project a connecting rod having a groove in the vicinity of the tip end on the fixed base side flange portion 21a of the bobbin 21, while providing a plate having a shaft hole that engages with the groove portion on the fixed base 4 side.

In FIG. 4, the relationship between the receiving seat 31c and the spherical tip portion 32a can be reversed. That is, the recess 31b is formed in the collar 31a on the fixed base side of the bobbin 31.
Instead of providing the above, it is possible to project a connecting rod having a spherical tip portion, and on the other hand, to provide a receiving seat on the fixed base 4 side so as to fit into this tip portion.

FIG. 7 is an explanatory view of a modification of the second to fifth embodiments of the optical fiber feeding device of the present invention. In the figure, 5 is the same center line as in FIG. 1, 61 is a bobbin, 61a is a flange part on the fixed base, 62 is a pivot bearing, 6
3 is a pin receiving hole, 64 is a connecting rod, and 65 is a rotation preventing pin. In the second to fifth embodiments described with reference to FIGS. 3 to 6, there is a possibility that the bobbin may rotate around the center line 5 while the optical fiber 2 is being paid out. The following shows one means. Based on the fifth embodiment described with reference to FIG. 6, in order to simplify the description, a configuration excluding the optical fiber 2 and the magnets 43 and 45 will be described.

The reason why the bobbin 61 is not rotated around the center line 5 is that the optical fiber end (lower port) on the side opposite to the feeding side is taken out from the bobbin 61 and connected to the transmission equipment. This is to prevent twisting due to rotation of the bobbin. Further, when the payout of the optical fiber 2 is suddenly delayed on the way, the inertia of the bobbin 61 and the optical fiber 2 wound around the bobbin prevents the payout optical fiber 2 from being caught in the bobbin 61. You can also

A connecting rod 64 fixed to the fixed base 4 is in contact with a pivot bearing 62 provided at the center of the fixed base side flange portion 61a of the bobbin 61. At least one rotation preventing pin 65 is arranged on the circumference of the fixed base 4 around the connecting rod 64, and the pivot bearing 62 is provided on the fixed base side flange portion 61a.
At least one pin receiving hole 63 on the circumference centered around
Is arranged. With the bobbin 61 tilted, at least one rotation preventing pin 65 is inserted into one of the pin receiving holes 63. Further, even when the bobbin is not tilted, the tip of the rotation preventing pin 65 is in one of the pin receiving holes 63.

As described above, by engaging the tip of the rotation preventing pin 65 with the pin receiving hole 63, it is possible to prevent the bobbin 65 from rotating around the center line 5 while the optical fiber 2 is being paid out. It is possible to omit the magnets 43 and 45 shown in FIG. 6 by using a magnet near the tip of the rotation prevention pin 65 and the pin receiving hole 63 or by using a material such as iron for either one. Is.

To prevent the rotation of the bobbin 65, the invention is not limited to the above example. Anti-rotation pin 65 and pin receiving hole 6
Reverse the arrangement of 3 and provide pin receiving holes on the side of the fixed base 4,
A rotation prevention pin may be provided on the fixed base side flange portion 61a side. In addition, the rotation prevention pin 65 has a tooth shape,
It is also possible to form the pin receiving holes 63 in a groove shape and to provide a large number of them so that both of them engage with each other like a gear. Although the above description is based on the fifth embodiment, the same modifications can be applied to the second to fourth embodiments.

When the optical fiber 2 is unwound in a twisted state from the optical fiber unwinding side flange portion of the bobbin 61, the transmission loss and the strength of the optical fiber 2 may increase. To prevent the optical fiber 2 from being unwound in a twisted state, the bobbin 61 is provided with the optical fiber 2
On the contrary, when winding the optical fiber 2, while not shown in the drawing, conversely, a guide that rotates around the central axis of the bobbin 61 is used, and the optical fiber 2 is twisted while the bobbin 61 is not rotated. May be wound around the bobbin 61.

In the above description, the feeding of the optical fiber 2 has been described, but instead of the optical fiber 2, it can be used for feeding a metal conductor cable or a general filament.

[0050]

As is apparent from the above description, according to the invention described in claim 1, an optical fiber having a tapered barrel portion and at least an optical fiber wound around the tapered barrel portion has a large taper. Since the bobbin is fed from the end portion on the radial side, the optical fiber does not rise at a steep angle and does not get over the end portion unlike the conventional case. Therefore, it is possible to prevent an increase in transmission loss during feeding of the optical fiber or prevent breakage of the optical fiber without using a complicated mechanism. Further, since the bobbin is provided with the supporting means for supporting the bobbin in a freely tiltable state, the above-described effect is promoted.

According to the second aspect of the invention, since the supporting means is the elastic connecting and fixing member, the bobbin itself can be easily inclined in a direction in which the optical fiber can be prevented from getting over at the end portion on the payout side. There is an effect that can be done.

According to the third aspect of the invention, the bobbin is a connecting rod having a shaft hole on the center line of the bobbin, and the supporting means is a connecting rod having a groove on the outer circumference, and the inner diameter of the shaft hole is larger than the outer diameter of the groove. Is also large, since the shaft hole engages with the groove, in the direction in which the optical fiber can be prevented from getting over at the end on the payout side,
There is an effect that the bobbin itself can be easily tilted.

According to the fourth aspect of the present invention, the supporting means has a connecting rod having a spherical tip portion, and the bobbin receives the tip portion on the center line of the bobbin and has a spherical receiving seat surrounding the tip portion. Since it has the above, there is an effect that the bobbin itself can be easily tilted in a direction in which it is possible to reduce the run-up of the optical fiber at the end portion on the delivery side.

According to the fifth aspect of the present invention, since the bobbin has the connecting rod on the center line of the bobbin and the supporting means has the bearing portion for receiving the tip of the connecting rod, the bobbin can be tilted freely. There is an effect that it can be easily supported by.

According to the sixth aspect of the invention, since the supporting means has the connecting rod and the bobbin has the bearing portion for receiving the tip of the connecting rod on the center line of the bobbin, the bobbin can be tilted freely. There is an effect that it can be easily supported by.

According to the invention described in claim 7, the supporting means has a fixing base, and between the tip of the connecting rod and the bearing, and between the end of the bobbin on the fixing base side and the fixing base. However, since the magnets are magnetically attracted to each other, there is an effect that the bobbin itself can be easily tilted in a direction in which the optical fiber can be prevented from getting over the end portion on the payout side.

According to the invention described in claim 8, since the supporting means has the rotation preventing means for preventing the rotation around the central axis of the bobbin during the payout of the optical fiber, the bobbin during the payout of the optical fiber. There is an effect that it is possible to prevent rotation around the central axis of the.

According to the ninth aspect of the present invention, the supporting means has the fixed base, and the rotation preventing means is at least circumferentially arranged at one of the fixed base or the fixed base side end of the bobbin. Since it has one pin and at least one pin receiving hole arranged on the circumference on the other side, it is possible to easily prevent rotation around the central axis of the bobbin during payout of the optical fiber. effective.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a first embodiment of an optical fiber feeding device of the present invention.

FIG. 2 is an explanatory diagram of an operation of the optical fiber feeding device shown in FIG.

FIG. 3 is an explanatory diagram of a second embodiment of an optical fiber feeding device of the present invention.

FIG. 4 is an explanatory diagram of a third embodiment of an optical fiber feeding device of the present invention.

FIG. 5 is an explanatory diagram of a fourth embodiment of an optical fiber feeding device of the present invention.

FIG. 6 is an explanatory diagram of a fifth embodiment of an optical fiber feeding device of the present invention.

FIG. 7 is an explanatory diagram of modifications of the second to fifth embodiments of the optical fiber feeding device of the present invention.

[Explanation of symbols]

1, 21, 31, 31, 41, 51, 61 ... Bobbin, 1c ... Tapered body portion, 1d ... Feeding side flange portion, 2 ... Optical fiber,
3 ... Coil spring, 4 ... Fixing stand, 5 ... Bobbin center line, 1
DESCRIPTION OF SYMBOLS 1 ... Feeding position, 22, 32, 42, 52, 64 ... Connecting rod, 43, 45 ... Magnet, 63 ... Pin receiving hole, 65 ... Rotation prevention pin.

Claims (9)

[Claims] 1. A bobbin that has a tapered barrel portion and feeds at least an optical fiber wound around the tapered barrel portion from an end portion on the large diameter side of the taper, and the bobbin can be tilted freely. An optical fiber feeding device having a supporting means for supporting. 2. The optical fiber feeding device according to claim 1, wherein the supporting means is a connecting and fixing member having elasticity. 3. The bobbin has a shaft hole on the center line of the bobbin, the supporting means is a connecting rod having a groove on the outer periphery, and the inner diameter of the shaft hole is larger than the outer diameter of the groove. The optical fiber payout device according to claim 1, wherein the shaft hole is large and is engaged with the groove. 4. The supporting means includes a connecting rod having a spherical tip portion, and the bobbin has a spherical receiving seat for receiving the tip portion on a center line of the bobbin and surrounding the tip portion. The optical fiber feeding device according to claim 1, wherein 5. The optical fiber according to claim 1, wherein the bobbin has a connecting rod on a center line of the bobbin, and the supporting means has a bearing portion that receives a tip of the connecting rod. Feeding device. 6. The optical fiber according to claim 1, wherein the supporting means has a connecting rod, and the bobbin has a bearing portion for receiving a tip end of the connecting rod on a center line of the bobbin. Feeding device. 7. The supporting means has a fixing base, and between the tip end portion of the connecting rod and the bearing and between the end portion of the bobbin on the fixing base side and the fixing base, The optical fiber feeding device according to any one of claims 5 to 6, characterized in that they are magnetically attracted to each other. 8. The supporting means according to claim 3, further comprising a rotation preventing means for preventing rotation of the bobbin around the central axis of the bobbin while the optical fiber is being paid out. Optical fiber feeding device. 9. The support means has a fixed base, and the rotation prevention means is arranged at least on one side of the fixed base or one end of the bobbin on the fixed base side.
9. One pin and, on the other hand, at least one pin receiving hole arranged circumferentially.
The optical fiber feeding device described in.