JP2001255422A - Manufacturing jig for multiple fiber bundle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To align fibers 1 with high precision by reducing a deviation from the arraying direction of the fibers 1 when terminal parts of a large number of fibers 1 are aligned so as to lineally align in the longitudinal direction and in the lateral direction respectively to manufacture a multiple fiber bundle Bu. SOLUTION: Fiber sheets 13, wherein a large number of fibers 1 are mutually and integrally stuck, are laminated and pressed in multistage in the state that they are held between fitting groove parts 16 of both sheet aligning jigs 14, 15 by a multiple fiber bundle manufacturing jig J which assembles first and second sheet aligning jigs 14, 15 having the fitting groove parts 16 of a nearly U shape in cross section and whereby they are integrally stuck.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of a jig for manufacturing a multi-core bundle by arranging a large number of fibers in a longitudinal direction and a lateral direction, respectively.

[0002]

2. Description of the Related Art Conventionally, when a multi-core bundle is manufactured by aligning and integrating a large number of circular cross-section fibers, for example, as disclosed in JP-A-11-337749,
By arranging a pair of V-groove substrates in which a plurality of V-grooves are formed in parallel on both sides of the flat substrate, and pressing each V-groove substrate against the flat substrate in a state where a fiber is inserted into the V-groove,
A method is known in which each fiber is sandwiched between substrates so that the outer peripheral surface thereof is in contact with two locations on the side surface of the V-groove and one location on the flat substrate, and the V-groove substrate and the flat substrate are bonded and integrated together with the fiber. .

[0003] In addition, in Japanese Patent Application Laid-Open No. 11-337761, a coating mounting portion for mounting a coating portion of a fiber, a stepwise continuous shape of the coating mounting portion, and a cover mounting portion. And a V-groove portion having a plurality of V-grooves into which the bare fiber portions from which the fiber coating portions have been removed are inserted.
The bare fiber portion is placed on the V-groove of the groove portion so that the coating portion is located on the coating placement portion, and the bare fiber portion is pressed against the V-groove portion of the substrate by the pressing member. They are integrated with an adhesive.

[0004]

By the way, instead of arranging a large number of fibers in a single line only in the horizontal direction (or the vertical direction) as described above as a multi-core bundle, In some cases, it is required that the components are arranged so as to be linearly arranged in both the vertical and horizontal directions.

In this case, since the fibers are arranged adjacent to the surrounding fibers, the fibers cannot be aligned by contacting the surface of the substrate or the side surface of the V-groove as in the above-mentioned conventional method.

In addition, since the fibers are arranged adjacent to each other, it is difficult for a large number of fibers to be accurately aligned in the alignment direction. For example, the upper fiber is not located on the lower fiber but is positioned on the lower adjacent fiber. The problem is that it is easy to be placed in a bale-stacked state located between them, and the deviation from the arrangement direction of the fibers becomes large, and it is difficult to accurately align the fibers so as to be linearly arranged in both the vertical direction and the horizontal direction. is there.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object the case where a large number of fibers are aligned so as to be linearly arranged in both the vertical and horizontal directions as described above. An object of the present invention is to make the jig for the manufacture of the fiber as small as possible from the arrangement direction of the fibers and to align the fibers in the longitudinal direction and the lateral direction with high precision.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a large number of fibers are arranged in a row, and a large number of fiber sheets which are bonded and integrated are stacked in multiple stages. As a jig for manufacturing a multi-core bundle in which a number of fibers are aligned so as to be linearly arranged in the vertical and horizontal directions, a jig having a fitting groove having a substantially U-shaped cross section is provided. The first and second sheet alignment jigs are combined.

Each of the sheet alignment jigs is provided with a first of the first and second inner surfaces facing each other in the fitting groove.
The inner side surface is orthogonal to the groove bottom surface, and the second inner side surface is inclined at a predetermined angle in a direction away from the first inner side surface toward the groove opening side, while the first and second outer side wall outer surfaces on both sides of the groove portion are provided. Of the side surfaces, the first outer surface located on the first inner surface side is inclined at the same inclination angle as the inclination angle of the second inner surface in a direction from the base end of the side wall toward the second outer surface toward the distal end. Then, the second outer surface on the second inner surface side extends in a direction orthogonal to the groove bottom surface, and the multi-stage fiber sheet is sandwiched between the fitting grooves of both sheet alignment jigs. The second inner surface of the second sheet aligning jig is on the first outer surface of the first sheet aligning jig, and the first outer surface of the second sheet aligning jig is on the second inner surface of the first sheet aligning jig. By bringing both sheet alignment jigs closer together while sliding each other,
The multi-stage fiber sheet is pressurized.

When a multi-core bundle is manufactured by the above-described configuration, for example, a large number of fibers corresponding to the lateral direction of the multi-core bundle are bonded and integrated with each other to form a fiber sheet. Make a number corresponding to the vertical direction of the bundle. Then, in order to stack and press the large number of fiber sheets in multiple stages using the first and second sheet aligning jigs, first, the fitting groove portion of the first sheet aligning jig is directed upward, for example. A large number of fiber sheets are stacked in a multi-stage such that each widthwise end thereof comes into contact with the first inner surface of the sheet alignment jig. Next, the second sheet aligning jig is placed on the multi-stage fiber sheet on the first sheet aligning jig with its fitting groove portion facing downward. At this time, the position of the upper second sheet aligning jig is changed to the lower first sheet aligning jig.
The second inner side surface of the second sheet aligning jig is shifted with respect to the sheet aligning jig, and the first outer side surface of the first sheet aligning jig is shifted to the first sheet. Each of the jigs is brought into contact with the second inner surface of the alignment jig. Thus, the multi-stage fiber sheet is confined in the space surrounded by the groove bottom surface and the first inner surface of the upper and lower sheet alignment jigs.

Then, when the upper second sheet aligning jig is pressed toward the lower first sheet aligning jig, the second inner side surface of the second sheet aligning jig becomes the first sheet aligning jig of the first sheet aligning jig.
On the outer side, the first outer side of the second sheet aligning jig is the first side.
The second sheet aligning jig descends while slidingly contacting the second inner side surface of the sheet aligning jig, and approaches the first sheet aligning jig. However, the first outer side surface and the second inner side surface are inclined. Therefore, as the two sheet aligning jigs approach each other, the multi-stage fiber sheet is not only pressed in the laminating direction between the groove bottom surfaces of the two sheet aligning jigs, but at the same time, the first sheet aligning jig of the both sheet aligning jigs Pressure is applied between the inner surfaces in the width direction (the direction orthogonal to the laminating direction). As a result, a large number of fiber sheets are stacked and pressed in a multi-stage state while being sandwiched between the fitting grooves of both sheet alignment jigs.

At this time, since a large number of fibers in each fiber sheet are linearly aligned in a line at a constant pitch, the fibers of adjacent fiber sheets are stacked in a laminating direction orthogonal to the width direction of the fiber sheet. In correspondence, all the fibers are linearly aligned in a single row in the stacking direction, whereby many fibers are aligned so as to be linearly aligned in both the vertical and horizontal directions. Then, a multi-core bundle is manufactured by bonding and integrating a multi-stage fiber sheet in such an aligned state of the fibers.

Further, by pressing the second sheet aligning jig toward the first sheet aligning jig, the multi-stage fiber sheet can be simultaneously pressed in two directions, ie, the laminating direction and the width direction. Fibers can be easily and reliably aligned so that they are linearly arranged in both the vertical and horizontal directions, and a multi-core bundle in which a large number of fibers are precisely aligned in the vertical and horizontal directions can be easily manufactured. can do.

According to the second aspect of the present invention, the first and second sheet alignment jigs have the same shape. In this case, 1
A multi-core bundle can be manufactured by stacking fiber sheets in multiple stages using various types of sheet alignment jigs, and the manufacturing cost can be reduced.

According to the third aspect of the present invention, a large number of fiber ends are arranged so as to be aligned in the vertical and horizontal directions, respectively. This makes it possible to easily obtain a multi-core bundle in which the deviation of the fiber terminal portions from the arrangement direction is as small as possible and the fiber terminal portions are accurately aligned in the vertical and horizontal directions.

[0016]

FIG. 11 shows a multi-core bundle Bu according to an embodiment of the present invention. The multi-core bundle Bu has a large number of optical fibers 1, 1,... Having a predetermined outer diameter, each having a circular cross section, which are aligned in the terminal portion so as to be linearly arranged in the vertical and horizontal directions, respectively. Specifically, for example, 744 fibers 1, 1,... Having an outer diameter of 0.5 mm (the outer diameter of the pre-coated portion 2 is 0.65 mm) are vertically arranged at the terminal portion in 12 stages and in the lateral direction. The multi-core bundle has a vertical dimension of 6.12 mm and a horizontal dimension of 31.92 mm, which are arranged in a line in 62 rows (12 × 62 = 744).

FIGS. 1 and 2 show a jig J for manufacturing a multi-core bundle according to an embodiment of the present invention which is used for manufacturing the multi-core bundle Bu. The jig J includes first and second jigs.
And a pair of sheet alignment jigs 14 and 15 described above.

The first and second sheet aligning jigs 14, 1
Reference numeral 5 is made of the same member having a substantially U-shaped cross section. That is,
In each of the sheet alignment jigs 14 and 15, the first inner side surface 17 of the first and second inner side surfaces 17 and 18 facing each other in the fitting groove portion 16 is orthogonal to the bottom surface 16a of the groove portion 16 (the second one). (1) The angle between the inner surface 17 and the bottom surface 16a of the groove 16 is 90 °. The second inner surface 18 is inclined at a predetermined angle α in a direction away from the first inner surface 17 toward the opening side of the groove 16. On the other hand, first and second outer surfaces 20, 21 are formed on the outer surfaces of the side walls on both sides of the groove 16, respectively.
Of these outer surfaces 20, 21, the first outer surface 20 located on the first inner surface 17 side is the second inner surface 18 in a direction from the base end of the side wall toward the second outer surface 21 toward the distal end.
At the same inclination angle α as the inclination angle α. Also,
The second outer surface 21 on the second inner surface 18 side is the bottom surface 1 of the groove 16.
It extends in a direction orthogonal to 6a (the angle between the second outer surface 21 and the bottom surface 16a of the groove 16 is 90 °).

As shown in FIG. 3, the sheet aligning jig 15
The inclination angle α of the second inner surface 18 and the first outer surface 20 is
As will be described later, the laminated multi-stage fiber sheet 1
The pressing amount A in the stacking direction (vertical direction) of 3, 13,...
It is set in accordance with the width B of each fiber sheet 13 in the width direction. In other words, the pressing amount A is changed by changing the inclination angle α.
And the relationship of the shift amount B can be changed from the equation of A / B = tan (90 ° −α). In the example of this embodiment,
The inclination angle α is α = 20 °, and the pressing amount A is A =
When the distance is 0.5 mm, the shift amount B is B = 0.5 / tan.
(90 ° −α) = 0.182 mm.

Next, a method of manufacturing the multi-core bundle Bu using the multi-core bundle manufacturing jig J will be described. First, a number of fibers 1, 1,.
A large number of fiber sheets 13, 13,... Are arranged in a line and bonded and integrated. Specifically, first, as shown in FIG. 4, a pre-coated portion 2 which is a coating layer for protection is removed from a terminal portion of each fiber 1 by a predetermined length to expose a glass-only portion.

Next, as shown in an enlarged manner in FIG. 6, a V-groove jig 4 and a pressing jig 7 are prepared, and the fibers 1, 1, from which the pre-coated portion 2 has been removed, are provided between the jigs 4, 7. Is carried out to clamp and hold the terminal portions of... That is,
The V-groove jigs 4 have the same number of V-grooves 5, 5,...
Are arranged side by side on the surface (upper surface) at a predetermined pitch p in parallel with each other. Are combined. Specifically, the angle θ between the groove side surfaces 5a, 5a of the V groove 5 is θ = 70 °, and the pitch p between the V grooves 5, 5 is p
= 0.515 mm, with the fiber 1 having a gap of about 0.01 mm between each V-groove 5 and the adjacent fiber 1 and protruding from the surface (upper surface) of the jig 4 other than the V-groove 5. It is inserted. The V-groove jig 4 is made of a high-hardness material such as ceramic or zirconia. On the other hand, the pressing jig 7 is formed by integrally bonding a soft material 9 such as a soft film to a surface (lower surface) of a base material 8 such as a glass plate.

As shown in FIG. 5, the number of fibers 1, 1,
Are respectively inserted into the V-grooves 5, 5,... Of the V-groove jig 4 and arranged in a line, and the pressing jig 7 is placed on the fibers 1, 1,.
Is placed in such a manner that the soft material 9 is in contact therewith, and the pressing jig 7 is pressed against the V-groove jig 4 by a clamping means (not shown) to clamp and hold each fiber 1 between the jigs 4 and 7. Then, each of the fibers 1 is moved to the V-groove jig 4 such that the outer peripheral surface of the fiber 1
Press and hold in a pressurized state so as to touch.

At this time, each fiber 1 is pressed by the V-groove jig 4 by the soft material 9 of the pressing jig 7.
Are provided at two locations P1, P on the groove side surfaces 5a, 5a of the V-groove 5.
2 makes sure that they touch each other.
1,... Can be arranged with high accuracy. In addition, since each fiber 1 is inserted into the V groove 5, the center of each fiber 1 is always V groove 5 even if there is a slight error in the outer diameter of the fiber 1.
And the fibers 1 and 1 are arranged in a state where the pitch between the fibers 1 and 1 always coincides with the pitch p between the V grooves 5 and 5.

In this way, a large number of fibers 1, 1,
Are pressed and held by the pressing jig 7 against the V-groove jig 4, and as shown in FIGS. 7 and 8, these many fibers 1, 1,. To make the fiber sheet 13. That is, in this step, the adhesive 11 made of a UV-curable resin is inserted into the gap between the fibers 1 at two locations (or three or more locations) on both sides of the V-groove jig 4 in the fiber length direction. Are adhered to each other by curing it by irradiating ultraviolet rays. (In FIG. 7, for the sake of explanation, the bonding range of the adhesive 11 is shown by hatching, and The sign of "adhesive 11" is shown).

Also, as described above, a large number of fibers 1,
After the fiber sheets 13 are made by bonding the 1, 2,... To the V-groove jig 4 in a state of being pressed and held, the fiber sheets 13 are removed from the V-groove jig 4, and as shown in FIG. Of the fibers 1, 1,...
Not only on both sides, but also on the entire area between them (the entire area between the adhesives 11, 11 shown in FIG. 7).
1 to reinforce the fiber sheet 13. This is performed by filling the adhesive 11, which is made of a UV-curable resin, between the fibers 1, 1,... At this time, the adhesive 11 is prevented from adhering to the top of each fiber 1 of the fiber sheet 13 (both ends of the outer peripheral surface of the fiber 1 in the direction orthogonal to the arrangement direction of the fibers 1, 1,... In the fiber sheet 13). warn.

After the bonding step, the large number of fibers 1, 1,... Of the fiber sheet 13 removed from the V groove jig 4 are connected to both sides of the V groove jig 4 and the portion between them. Are further bonded by the adhesive 11, so that the fibers 1, 1,... In the fiber sheet 13 can be firmly bonded and integrated so that they cannot be separated from each other, and the fiber sheet 13 can be reinforced.

Moreover, in the bonding step, a large number of fibers 1, 1,... Are bonded at two places on both sides of the V-groove jig 4, so that the fibers 1, 1,. And the fiber sheet 13 can be further reinforced.

Since the adhesive 11 is an adhesive made of a UV-curable resin, a desirable adhesive capable of easily and quickly bonding the fibers 1, 1,... Can be obtained. Of course, different types of adhesives may be used).

The fiber sheet 13 manufactured as described above is arranged such that a large number of fibers 1, 1,... Corresponding to the lateral direction of the multi-core bundle Bu are linearly arranged in a line at a constant pitch. It will be. The number (1) of the fiber sheets 13 corresponding to the longitudinal direction of the multi-core bundle Bu is
2) only.

Thereafter, as shown in FIG. 1, using the jig J for manufacturing a multi-core bundle according to the embodiment of the present invention, the plurality of fiber sheets 13, 13,. A laminating step is performed in which the jigs are stacked in multiple stages while being sandwiched between the fitting grooves 16 having a substantially U-shaped cross section of the aligning jigs 14 and 15 and pressure is applied. These pair of sheet alignment jigs 14 and 15
In order to stack and press a large number of fiber sheets 13, 13,..., First, the fitting groove 16 of the first sheet alignment jig 14 (lower sheet alignment jig) is turned upward, .. Are stacked in a multi-stage such that the widthwise ends of the fiber sheets 13 contact the first inner surface 17 of the first sheet alignment jig 14. Then the second
The sheet aligning jig 15 (upper sheet aligning jig) is put on the multi-stage fiber sheets 13, 13,... In the first sheet aligning jig 14 with the fitting groove 16 facing downward. At this time, the position of the second sheet aligning jig 15 is shifted with respect to the first sheet aligning jig 14, and the second inner side surface 18 of the second sheet aligning jig 15 is shifted to the first outer side surface of the first sheet aligning jig 14. 2
0, and the first outer side surface 20 of the second sheet alignment jig 15 is brought into contact with the second inner side surface 18 of the first sheet alignment jig 14, respectively.

Thereafter, using a clamping means (not shown), the second
When the sheet aligning jig 15 is pressed downward toward the first sheet aligning jig 14, the second sheet aligning jig 15
The inner surface 18 is the first outer surface 20 of the first sheet alignment jig 14.
Also, while the first outer surface 20 of the second sheet aligning jig 15 is in sliding contact with the second inner surface 18 of the first sheet aligning jig 14, the second sheet aligning jig 15 is moved down to the first position.
When approaching the sheet aligning jig 14, the first outer surface 2
Since the first and second inner side surfaces 18 are inclined, the multi-stage fiber sheets 13, 13,... Are formed in the grooves 16 of the upper and lower sheet aligning jigs 14, 15 as the two sheet aligning jigs 14, 15 approach. , 16 are pressed not only in the laminating direction between the bottom surfaces 16a, 16a, but also at the same time, in the width direction (direction orthogonal to the laminating direction) between the first inner side surfaces 17, 17 of both sheet aligning jigs 14, 15. At the lower end position of the upper second sheet alignment jig 15, the multi-stage fiber sheet 1
Are the bottom surfaces 16a, 16a of the grooves 16, 16 of the upper and lower sheet alignment jigs 14, 15, and the first inner surface 1.
It is pushed into a space having a rectangular cross section surrounded by 7 and 17.

At this time, since a large number of fibers 1, 1,... In each fiber sheet 13 are linearly arranged in a line at a constant pitch, the corresponding fibers 1 of the vertically adjacent fiber sheets 13, 13 are arranged. , 1 correspond to the lamination direction (vertical direction) of the fiber sheets 13, 13,..., All the fibers 1, 1,. The plurality of fibers 1, 1,... Are aligned so as to be linearly arranged in both the vertical and horizontal directions.

As described above, by pressing the upper second sheet aligning jig 15 toward the lower first sheet aligning jig 14, the multi-stage fiber sheets 13 and 1 are pressed.
.. Can be simultaneously pressed in two directions, ie, the laminating direction and the width direction, which makes it possible to easily and surely assemble a large number of fibers 1, 1,. Both can be aligned so that they are linearly arranged with high accuracy.

Further, the first and second sheet aligning jigs 1
4 and 15 have the same shape, so that the fiber sheets 13 and 1 are formed by using one type of sheet alignment jigs 14 and 15.
The multi-core bundle Bu can be manufactured by stacking 3,... In multiple stages, and the manufacturing cost can be reduced.

Thereafter, as described above, the multi-stage fiber sheets 13, 1 are placed between the pair of sheet aligning jigs 14, 15.
As shown in FIG. 10, in the state where the layers 3 and 3 are kept under pressure, furthermore, as shown in FIG. 23, the width of the fiber sheet 13 on both sides of the jig 15 is regulated, and the ends of the fiber sheet 13 are integrated by bonding using an adhesive, and as shown in FIG. Multi-core bundle Bu
To form

Then, the multi-stage fiber sheet 13,
The multi-core bundle Bu with the integrated adhesive 13 is pressed and held between the sheet aligning jigs 14 and 15 of the multi-core bundle manufacturing jig J, and is fitted to the terminal sleeve 25 shown in FIGS. And combine them. This terminal sleeve 25
Is a bottomed cylindrical shape, and a sheet aligning jig 14, which clamps the fiber sheets 13, 13,.
An opening 26 is formed through which an opening 15 can be fitted with a slight gap. In the opening 26, three screw holes 27, 27,... Penetrating to the outer peripheral surface around the bottom wall are formed on two side surfaces corresponding to two adjacent pieces, respectively. A multi-core bundle Bu is inserted into the terminal sleeve 25 from the opening side together with the sheet aligning jigs 14 and 15, and is screwed into the terminal sleeve 25.
The sheet alignment jigs 14 and 15 are fitted into the openings 26 in the bottom wall, and the sheet alignment jigs 14 and 15 are respectively opposed to the side surfaces of the opening 26 where the two screw holes 27 and 27 are opened by the mounting screws. Press it against the side surface (reference mounting surface). Finally, the end face (the end face of each fiber 1) of the multi-core bundle Bu protruding from the terminal sleeve 25 may be polished so that light can enter.

Therefore, in the multi-core bundle Bu manufactured in this manner, the deviation from the arrangement direction of the fibers 1, 1,... Is as small as possible, and the fibers 1, 1,. Are arranged with high accuracy.

In the above embodiment, the fibers 1, 1,
Are aligned in the vertical and horizontal directions, respectively, but other parts than the terminals of the fibers 1, 1,... May be aligned to manufacture a multi-core bundle.

[0039]

As described above, according to the first aspect of the present invention, a large number of fiber sheets each having a large number of fibers arranged in a line and bonded and integrated are stacked and pressed in multiple stages to form a large number of fibers. As a jig for manufacturing a multi-core bundle in which the fibers are aligned so as to be linearly arranged in the vertical direction and the horizontal direction, respectively, a first and second pair of fitting grooves having a substantially U-shaped cross section are provided. The sheet aligning jig is combined, and each sheet aligning jig has a first inner side surface of the first and second inner side surfaces facing each other in the fitting groove portion orthogonal to the groove bottom surface,
The second inner side surface is inclined at a predetermined angle in a direction away from the first inner side surface toward the groove opening side, and the first inner side surface of the first and second outer side surfaces that are the outer wall surfaces on both sides of the groove portion. The first outer surface located on the side is inclined at the same inclination angle as the inclination angle of the second inner surface in a direction from the base end side of the side wall toward the distal end side toward the second outer surface, and (2) By having the outer surface extend in a direction perpendicular to the groove bottom surface, a large number of fibers can be easily and reliably aligned so as to be linearly arranged in both the longitudinal and lateral directions,
It is possible to easily manufacture a multi-core bundle in which a large number of fibers are precisely aligned in the vertical and horizontal directions.

According to the second aspect of the present invention, since the first and second sheet alignment jigs have the same shape, a multi-core bundle can be manufactured using one type of sheet alignment jig. The manufacturing cost can be reduced.

According to the third aspect of the present invention, since the fiber ends are aligned in the vertical and horizontal directions, a multi-core bundle in which the fiber ends are precisely aligned in the vertical and horizontal directions can be easily obtained. Is obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a state in which fiber sheets are stacked in multiple stages and pressed using a jig for manufacturing a multi-core bundle according to an embodiment of the present invention.

FIG. 2 is an enlarged plan view of each sheet alignment jig in the jig for manufacturing a multi-core bundle.

FIG. 3 is an explanatory diagram showing the relationship between the amounts of movement of two sheet alignment jigs in two directions.

FIG. 4 is an enlarged view showing a fiber in a state where a precoat portion is removed from a terminal portion.

FIG. 5 is a plan view showing a holding step.

FIG. 6 is an enlarged cross-sectional view showing a state where the fiber is pressed against a V-groove jig in a holding step.

FIG. 7 is a plan view showing a state in which fibers are bonded and integrated to form a fiber sheet in a bonding step.

FIG. 8 is an enlarged sectional view showing a part of the fiber sheet.

FIG. 9 is a diagram corresponding to FIG. 8, showing a part of a fiber sheet in which fibers are further bonded with an adhesive.

FIG. 10 is a plan view showing a state where a multi-stage fiber sheet is bonded and integrated.

FIG. 11 is an enlarged sectional view of the manufactured multi-core bundle.

FIG. 12 is an enlarged front view showing a state where the terminal sleeve is attached to the multi-core bundle.

FIG. 13 is an enlarged sectional view of a terminal sleeve.

[Explanation of symbols]

 J Multi-core bundle manufacturing jig 1 Fiber 4 V-groove jig 5 V-groove 11 Adhesive 13 Fiber sheet 14, 15 Sheet alignment jig 16 Fitting groove 16a Bottom surface 17 First inner surface 18 Second inner surface 20 First Outer surface 21 Second outer surface α Inclination angle Bu Multi-core bundle

Claims (3)

[Claims] 1. A large number of fibers are arranged in a line, and a large number of fiber sheets, which are bonded and integrated, are laminated in multiple stages and pressed, so that the large number of fibers are straightened in the longitudinal and lateral directions, respectively. A jig for manufacturing a multi-core bundle aligned in a line, comprising a combination of first and second sheet alignment jigs having fitting grooves each having a substantially U-shaped cross section; In the jig, the first inner surface of the first and second inner surfaces facing each other in the fitting groove is orthogonal to the groove bottom surface, and the second inner surface is separated from the first inner surface toward the groove opening side. Of the first and second outer surfaces, which are the outer surfaces of the side walls on both sides of the groove.
The first outer surface located on the first inner surface side is the second outer surface facing the second outer surface from the base end of the side wall toward the distal end.
The second inner side surface is inclined at the same inclination angle as that of the inner side surface, and the second outer side surface of the second inner side surface extends in a direction orthogonal to the groove bottom surface. With the fiber sheet sandwiched, the second inner surface of the second sheet alignment jig is aligned with the first outer surface of the first sheet alignment jig, and the first outer surface of the second sheet alignment jig is aligned with the first sheet. Jig 2
A multi-core bundle manufacturing jig characterized in that a multi-stage fiber sheet is pressed by bringing both sheet alignment jigs close to each other while sliding on the inner surface. 2. A jig for manufacturing a multi-core bundle according to claim 1, wherein the first and second sheet alignment jigs have the same shape. . 3. A jig for manufacturing a multi-core bundle according to claim 1, wherein a plurality of fiber ends are arranged in a vertical direction and a horizontal direction, respectively. Jig for manufacturing bundles.