JPH07261033A - Cutting machine for ribbon of multi-core coated optical fiber - Google Patents

Abstract

PURPOSE:To provide the multi-core ribbon coated optical fiber cutting machine which can securely cut bare optical fibers without flawing the core even when the bare optical fibers are arrayed eccentrically in the multiple coated optical fiber. CONSTITUTION:The multi-core ribbon coated optical fiber cutting machine 21, having clamps 24 and 25 which grip the tip part and jacket part end of a bare optical fiber exposed by removing the jacket layer of the terminal part of the multi-core ribbon coated optical fiber respectively and a flawing blade 30 which is positioned between the two clamps 24 and 25 and flaws the surface of the bare optical fiber is provided with clamps 22 and 23 which align the bare optical fibers between the flawing blade 30 and two clamps 24 and 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting machine for a multi-core optical fiber ribbon which has a plurality of optical fibers arranged in parallel inside.

[0002]

2. Description of the Related Art As a multi-core optical fiber ribbon
It is common to have an optical fiber of 8 cores or 12 cores. For example, the 4-fiber optical fiber ribbon 1
As shown in FIG. 4, the primary coating layer 3a is formed on the bare optical fiber 2.
Arranging a plurality of optical fibers having a plane in parallel,
A secondary coating layer 3b is applied in common to these and formed into a tape shape. In the case of fusion-splicing a bare optical fiber having such a multi-core optical fiber ribbon, the coating layer at the end is removed to expose the bare optical fiber, and the exposed bare optical fiber is cut near the end. For example, as shown in FIG. 5, a conventional method for cutting a multi-core optical fiber ribbon is to remove the coating layer at the end of the multi-fiber ribbon 1 and expose the tip of the bare optical fiber 2. Clamps 12 and 13 grip the coating portion and the coating portion 3, respectively, and clamp 11 holds the coating portion 3 to hold the bare optical fiber 2 horizontally in the air. In this state, the scratching blade 14 is moved in parallel with the arrangement direction of the bare optical fibers 2 to scratch the surface of the bare optical fibers 2, and bending stress is applied to the scratched portions for cutting.

[0003]

SUMMARY OF THE INVENTION In the above cutting method,
The reason for holding the bare optical fiber 2 with the clamps 12 and 13 is to prevent the bare optical fiber 2 from moving in the longitudinal direction when the bare optical fiber 2 is cut. Therefore, when cutting the multi-core optical fiber tape core wire 1 in which the bare optical fibers 2 are eccentrically arranged, it may not be possible to hold the clamps 12 and 13 in a planar alignment, and the bare optical fibers cannot be cut. There is a problem that 2 occurs or the core of the bare optical fiber 2 is damaged.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides a multi-core optical fiber tape core wire cutting machine which solves the above problems, and is exposed except for the coating layer at the end of the multi-core optical fiber tape core wire. A multi-fiber optical fiber ribbon having a clamp for gripping the front end and the edge of the coated bare optical fiber, and a scratch blade located between the two clamps and scratching the surface of the bare optical fiber. In the cutting machine, a clamp having a function of aligning the bare optical fiber is provided between the scratched blade and at least one of the two clamps.

[0005]

As described above, when a clamp having a function of aligning a bare optical fiber is provided between the scratched blade and at least one of the two clamps, the bare optical fiber is a multi-core optical fiber. Even if the tapes are arranged eccentrically in the core wire, the clamp having the function of aligning aligns the array of the bare optical fibers, so that the bare optical fibers can be reliably cut without damaging the core.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a perspective view of an embodiment of a multi-fiber optical fiber ribbon fiber cutting machine 21 according to the present invention. In the figure, 22 and 23 are clamps having the function of aligning the bare optical fiber, 24 and 25 are clamps that prevent the bare optical fiber from moving in the longitudinal direction, 26 is a cover plate that pushes the bare optical fiber from above, and 27. Is a press for pressing the cut portion of the bare optical fiber from above, 28 is a cutting button, 29 is a tool rest, 30 is a damaged blade, and 31 is a fixed pedestal.

The clamps 22 and 23 having the function of aligning the bare optical fiber are respectively composed of lower clamp bases 22a and 23a fixed to a fixed pedestal 31 and an upper clamp retainer 22b fixed to a cover plate 26. 23b. As shown in FIG. 2, the clamp bases 22a and 23a are provided with V grooves 32 in parallel at a predetermined pitch.
The V groove 32 has a shape such that the half of the bare optical fiber 2 is embedded therein. Further, the clamps 24 and 25 are respectively the lower clamp base 24 fixed to the fixed base 31.
a, 25a and upper clamp retainers 24b, 25b fixed to the cover plate 26.

Next, the handling of the multi-fiber optical fiber ribbon cutting machine 21 will be described. First, the clamp base 22
A naked optical fiber group is arranged on a, 23a and 24a, 25a, the cover plate 26 is covered from the upper side, and the clamp holder 2
The naked optical fiber group is sandwiched between 2b, 23b and 24b, 25b, the cut button 28 is picked up, the macula 27 is tilted, and the cut portion of the naked optical fiber group is pressed. At this time, one each of the bare optical fibers 2 is placed in each V groove 32 of the clamp bases 22a and 23a.
Place each book and hold it down. Then, the tool post 29 is moved at a right angle to the arranged bare optical fiber 2 to remove the scratched blade 3.
0 scratches the bare optical fiber group.

The above-mentioned multi-core optical fiber tape core wire cutting machine 2
1 is used, even if the bare optical fiber 2 in the multi-fiber optical fiber ribbon 1 is eccentric as shown in FIG. 3, the bare optical fiber 2 held by the clamps 22, 23, 24, 25 is Between the clamps 22 and 23, the clamps 22 and 23 are arranged in a plane at a predetermined pitch with no vertical deviation and alignment is performed. Therefore, if the scratching blade 30 is moved horizontally, it is possible to surely and uniformly cut all the bare optical fibers without damaging the core. In the present invention, the clamp having the centering function is not limited to the clamp base having the V groove as in the above embodiment. Specifically, it may be a U groove. Further, the clamp having the aligning function does not need to be provided on both sides of the damaged blade as in the above-mentioned embodiment, but may be provided on one side.

[0010]

As described above, according to the present invention, a clamp for gripping the exposed end of bare optical fiber and the edge of the bare optical fiber except for the coating layer at the end of the multi-fiber optical fiber ribbon. , Located between the two clamps,
In a multi-core optical fiber ribbon cable cutting machine having a scratch blade for scratching the surface of a bare optical fiber, between the scratch blade and at least one of the two clamps,
Since the clamp having the function of aligning the bare optical fiber is provided, even if the bare optical fiber is eccentrically arranged in the multi-core optical fiber tape, the clamp having the function of aligning the bare optical fiber Since the array is aligned in a plane, there is an excellent effect that the bare optical fiber can be surely and easily cut without damaging the core.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a multi-core optical fiber tape core wire cutting machine according to the present invention.

FIG. 2 is a sectional view of a clamp base of a clamp having a function of aligning a bare optical fiber in the above embodiment.

FIG. 3 is a cross-sectional view of a multi-core optical fiber ribbon in which optical fibers are arranged eccentrically.

FIG. 4 is a cross-sectional view of a multi-core optical fiber tape core wire.

FIG. 5 is an explanatory view of a conventional method for cutting a multi-core optical fiber tape core wire.

[Explanation of symbols]

1 multi-fiber optical fiber ribbon 2 bare optical fiber 3 coating part 3a primary coating layer 3b secondary coating layer 11, 12, 13 clamp 14, 30 scratching blade 21 multi-fiber optical fiber ribbon cutting machine 22, 23, 24, 25 Clamps 22a, 23a, 24a, 25a Clamp stand 22b, 23b, 24b, 25b Clamp holder 26 Lid plate 27 Macula 28 Cutting button 29 Tool post 31 Fixed pedestal 32 V groove

Claims (1)

[Claims] 1. A clamp, which is located between the two clamps and a clamp for gripping the exposed end of the bare optical fiber excluding the coating layer at the end of the multi-fiber optical fiber ribbon and the coating portion, respectively. In a multi-fiber optical fiber ribbon fiber cutting machine having a scratching blade that scratches the surface of the bare optical fiber,
A multi-fiber optical fiber ribbon cutting machine comprising a clamp having a function of aligning a bare optical fiber between the scratching blade and at least one of the two clamps.