JP5075851B2 - Optical fiber end face polishing jig - Google Patents

Description

The present invention is related to the polishing jig of the optical fiber end face.

  Conventionally, as a method of performing polishing on a plane orthogonal to the longitudinal direction (axial direction) of an optical fiber, it is common to set it on a jig one by one (for example, patent document) 1). That is, there is a limit to increasing the number of processing by the method of setting a total of four optical fiber end portions one by one on a rotatable disk-shaped mounting jig.

Japanese Utility Model Publication No. 60-29044

Therefore, in order to increase the number of optical fiber end faces that can be polished (the number of treatments), conventionally, the ends of a plurality of optical fibers are fixed with an adhesive so as to be bundled, and inserted into a metal cylinder, A method of polishing was performed.
However, in this method, it takes a lot of time to fix the optical fiber with an adhesive and to remove the adhesive after polishing, and to take out the optical fiber, and the production efficiency is considerably poor. There was a problem. In addition, there is a problem that an adhesive intervenes on the polished surface, and uneven polishing tends to occur, resulting in a low product yield.

  Therefore, the present invention can easily and surely bundle and fix the ends of a plurality of optical fibers, and can be easily and quickly detached, so that polishing unevenness does not occur, and high quality. It is an object of the present invention to provide a polishing jig, a polishing apparatus, and a polishing method that can efficiently polish the end face of an optical fiber.

In order to achieve the above object, an optical fiber end surface polishing jig according to the present invention is a polishing jig for inserting and fixing a plurality of optical fiber end portions into holding holes of a jig body. the inserted the optical fiber end portion, as viewed from the axial direction of the holding hole, the first pressing block second pressing block which presses retractably from two orthogonal directions, comprising, the axial direction As seen from the above, the first tip surface of the first pressing block is linear, and the first pressure-receiving surface facing the first tip surface in the holding hole is linear, and further, the second pressing surface The second tip surface of the block is an uneven wave shape, and the second pressure receiving surface facing the second tip surface in the holding hole is an uneven wave shape.

Further, when N is an integer of 2 or more, N and (N + 1) lines are sequentially and alternately repeated so as to be orthogonal to the first tip surface and the first pressure receiving surface. The end portion of the optical fiber is held as a multi-layer stacked assembly, and the concave and convex portions of the corrugated corrugations of the second tip surface and the second pressure receiving surface are formed from other directions orthogonal to the stacked assembly. The end portions of the optical fiber are fixed and held in correspondence with the convex portions and concave portions of the side surface concave and convex portions of the stacked assembly .

  According to the present invention, the end portions of a plurality of optical fibers can be fixed and held in a stable arrangement state without using an adhesive, and the end surfaces of the optical fibers can be polished with extremely high efficiency and high accuracy. It becomes possible. Further, polishing unevenness does not occur and the product yield can be remarkably improved.

It is a front view which shows one Embodiment of this invention. It is an AA cross-sectional arrow view of FIG. It is a BB cross-sectional arrow view of FIG. It is C arrow line view of FIG. It is a D arrow line view of FIG. It is explanatory drawing of an accumulation | aggregation | set assembly. It is an operation explanatory view. It is an operation explanatory view. It is a perspective view of the principal part of a polisher. It is a bottom view for explaining the principal part of the polishing apparatus.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
1 to 5 exemplify a polishing jig 2 that collects and fixes and holds a plurality of optical fiber end portions 1, and this polishing jig 2 is a disk-shaped disk 3 shown in FIGS. 9 and 10. Is fixed to the mounting window 4 by the fixing means 5 and is used to polish the end face 10 of the optical fiber end 1 so as to face a rotary polishing disk (not shown).

  Reference numeral 6 denotes a jig body, and a holding hole 7 is provided therethrough, and the optical fiber end portion 1 is inserted into the holding hole 7 and fixedly held. The jig body 6 has a rectangular parallelepiped outer shape having a parallel square substantially one surface 11 and another surface 12, a small chamfer 13 is formed at one corner, and a large chamfer 14 is formed at a diagonal. As shown in FIG. 10, the small chamfer 13 is placed on a desk (work table) or the like so that the pressing and fixing operation of the optical fiber end 1 described later can be performed without error, as shown in FIG. In addition, due to the difference in size between the chamfers 13 and 14, consideration is given so that the fixing means 5 can definitely hold and hold the head in the correct posture.

As shown in FIGS. 1 to 8, the optical fiber end 1 inserted into the holding hole 7 can be freely advanced and retracted from two orthogonal directions X and Y when viewed from the axial direction L ₀ of the holding hole 7. A first pressing block 21 and a second pressing block 22 to be pressed are incorporated in the jig body 6.

When viewed from the axial direction L _0, will be described below, the first press block 21 has a first distal end surface 21A corresponding to the optical fiber end portion 1, the first distal end surface 21A exhibits a straight line. In the holding hole 7, the first pressure receiving surface 31 facing the first tip surface 21A is linear, and the linear first pressure receiving surface 31 and the first tip surface 21A are parallel to each other.
On the other hand, the second tip surface 22A of the second pressing block 22 has an angular corrugated wave shape, and the second pressure receiving surface 32 facing the second tip surface 22A in the holding hole 7 has an angular corrugated wave. The two corrugated corrugations are set symmetrically (same shape).

  Further, if N is an integer of 2 or more, as shown in FIGS. 1, 6, and 8, the first tip surface 21A and the first end face 21A and the first tip are sequentially repeated so that N pieces and (N + 1) pieces are alternately repeated. Between the pressure-receiving surfaces 31, the optical fiber end portion 1 is stacked as a plurality of layers in the direction of one direction X (out of two orthogonal directions X and Y) as a multilayer assembly 15. The first tip surface 21A, the first pressure receiving surface 31, and the second tip surface 22A, the second pressure receiving surface 32 are pressed (sandwiched) in a surrounding shape and held and fixed. More specifically, from the other direction Y (in the two orthogonal directions X and Y) of the accumulation assembly 15, the concave and convex concave portions 16 and convex portions of the second tip surface 22A and the second pressure receiving surface 32 are formed. 17 is fixedly held corresponding to the convex portions 18A and the concave portions 18B of the side surface uneven portion 18 formed on the side surface (lateral surface) of the stack assembly 15.

  In FIG. 6 (A), FIG. 1 and FIG. 8, the above-mentioned integer N is set to 3, and three, four, three, four and three are stacked in five layers and approximated to a square. And stable. FIG. 6B illustrates an example in which the integer N is 2, and two, three, two, three, two, and five layers are stacked. In the present invention, if N ≧ 2, the integer N can be freely set to 4 or more, the number of stacked layers can be increased or decreased, and is not limited to FIGS. 6 (A) and 6 (B).

As will be further described here, the jig body 6 has a substantially rectangular parallelepiped shape when viewed from the axial direction L ₀ , but the holding hole 7 is deviated to a corner with a smaller chamfer 13. 1, and the holding hole 7 is formed with a circular hole 8 at a predetermined depth (in the direction perpendicular to the plane of FIG. 1) from the one surface 11 side. The bottom surface of the hole 8 is formed in the tapered surface 9 and is continuously provided in the square-shaped square hole 23. Two adjacent surfaces of the square hole 23 are the first pressure receiving surface 31 and the second pressure receiving surface 32 described above, and the remaining two surfaces slide the first and second pressing blocks 21 and 22. It is cut off by the cutout grooves 24 and 25 for reciprocating guide (see FIGS. 1, 2 and 3).

That is, in FIG. 1, a V-shaped through-hole portion including the holding hole 7 and the notch grooves 24 and 25 is formed by cutting or the like from one surface 11 to the other surface 12 (on the back side). Thin wall portions 28 and 29 are left and formed on the left and right sides 26 and 27 (see FIGS. 3 and 2).
Each of the thin wall portions 28 and 29 has a guide small hole 30 penetrating toward the one surface 11, and a knock pin 33 erected on the back surface of the first and second pressing blocks 21 and 22 has a guide small hole. 30 is slidably inserted, and is capable of reciprocating in the forward and reverse directions of arrows X and Y, and guides the first and second pressing blocks 21 and 22 and advances and retracts (described later). It also serves to prevent the bolts 34 and 35 from coming off from the key holes 36 and 37.

  Screw holes 38 and 39 are recessed in the back surfaces of the first and second pressing blocks 21 and 22, and forward and backward bolts 34 and 35 are provided so as to be screwed into the screw holes 38 and 39, respectively. The key holes 36 and 37 are penetrated through the thin wall portions 28 and 29, and the advance and retreat bolts 34 and 35 are integrally formed with the head for external operation, the neck, and the bulging portions 40 and 41 for clamping. After inserting the bulging portions 40 and 41 for clamping into the large-diameter hole portions of the key-shaped hole portions 36 and 37, the neck portions correspond to the locking groove portions 36A and 37A of the key-shaped hole portions 36 and 37. After that, the knock pin 33 is driven from the outside to prevent the neck portion from being detached from the locking groove portion.

  Next, a method of using the above-described polishing jig 2 will be described. As shown by an imaginary line in FIG. 7, the first pressing block 21 is kept in a retracted position, and the second pressing block 22 is also shown by a solid line in FIG. In this manner, the optical fiber end 1 is inserted into the holding hole 7 from the one surface 11 side of the jig body 6 (that is, from the circular hole 8 side) without using an adhesive. (As shown in FIGS. 2 and 3), the first pressing block 21 is first moved to the direction indicated by the arrow X by projecting from the other surface 12 by a small dimension E (as indicated by the solid line from the phantom line in FIG. 7). The front end surface 21A is stopped at a position where it is on an extension of one side surface (near side) of the notch groove 25. That is, the distal end surface 21A is stopped on the extended plane of the one side surface 22C of the second pressing block 22 (near side). Under this state, the optical fiber end face 1 is in a loose state (a state in which it can move relatively freely) as shown in FIG.

  Next, when the second pressing block 22 is advanced in the direction of the arrow Y, the interval (pitch) between the convex portions 17 and 17 is set in advance to the pitch in the stacking direction X of the stack assembly 15 shown in FIG. By setting the projections 17 in the same manner and setting the projections 17 in advance at positions corresponding to the depressions 18B of the accumulation assembly 15, from the loose state of FIG. 7, as shown in FIG. In the piled state, it is surely and smoothly pressed and fixed.

  In addition, as shown in FIG. 1, by placing a small chamfer 13 on a mounting surface 42 such as a desk or work table, the heads of the bolts 34 and 35 are positioned upward and can be easily rotated. Thus, the first pressing block 21 and the second pressing block 22 can be easily moved forward (backward).

  In this way, without using an adhesive on the end portions 1 of the plurality of optical fibers, they are pressed from the two orthogonal directions X and Y into the holding hole 7 of the jig main body 6 to be held and fixed as a stacked assembly 15. Then, together with the polishing jig 2, it is inserted into the substantially square window portion 4 of the disk 3 shown in FIGS. 9 and 10, and fixed by the fixing means 5, and the optical fiber is attached to the rotary polishing member (not shown). Polishing while contacting the end face 10. At this time, it is also desirable to rotate the disk 3 and polish the end face 10 uniformly.

  Next, the fixing means 5 attached to the disk 3 will be described with reference to FIGS. 9 and 10. A radial screw hole is formed on the disk lower surface 45 along one side 4 </ b> A near the outer periphery of the substantially square window 4. A square columnar block 47 penetrating 46 is fixed, and a set screw 48 is screwed into the screw hole 46. Further, a V-shaped member 49 is fixed to the lower surface 45 in the vicinity of one side 4B near the inner diameter, and the two sides 26 and 27 of the jig body 6 are attached to the right-angle contact receiving surface 49A of the V-shaped member 49. If the set screw 48 is screwed (with a work tool not shown), the jig 2 is firmly fixed at an accurate position.

  As shown in FIG. 1 and FIG. 10, 17 optical fiber end portions 1 are fixedly held by one jig 2, and three jigs 2 are attached to three window parts 4 as shown in FIG. After fixing and polishing 51 pieces, it was confirmed that the productivity was drastically improved as compared with the case of collective integration with a conventional adhesive. In addition, the polished surface of the end face 10 is smooth and beautiful with high accuracy, maintains high quality, and significantly improves the yield.

As described above, the present invention is the above-described optical fiber inserted in the polishing jig for fixing and holding a plurality of optical fiber end portions 1 in the holding holes 7 of the jig body 6. The first pressing block 21 and the second pressing block 22 are configured to press the end portion 1 so as to freely advance and retreat in two orthogonal directions X and Y when viewed from the axial direction L ₀ of the holding hole 7. Therefore, the optical fiber end portion 1 can be securely fixed and held in a stable state, the polishing can be set up quickly, and uneven polishing can be prevented, and the optical fiber end face can be polished with high accuracy. Further, the use of conventional adhesives can be omitted, and the production efficiency can be remarkably improved.

Further, as viewed from the axial direction L ₀ , the first tip surface 21A of the first pressing block 21 is linear, and the first pressure receiving surface facing the first tip surface 21A in the holding hole 7. 31 is a straight line, and the second tip surface 22A of the second pressing block 22 is a corrugated wave shape, and the second pressure receiving surface 32 facing the second tip surface 22A in the holding hole 7 is Since it is a concavo-convex wave type, as described in FIGS. 7 to 8, it becomes possible to bundle the optical fiber end portions 1 in an orderly and naturally stacked state, further improving the efficiency of the setup work for polishing. It can be planned. In addition, since it is firmly held and fixed in the stacked state, the polishing accuracy of the optical fiber end face 10 can be improved, and the defect occurrence rate can be significantly reduced.

  Further, if N is an integer equal to or larger than 2, N and (N + 1) lines are alternately repeated one after the other between the first tip surface 21A and the first pressure receiving surface 31 so as to be alternately repeated. The optical fiber end 1 is held as a multi-layer stacked assembly 15 toward the upper side, and the second tip surface 22A and the second pressure receiving surface 32 are formed from the other direction Y perpendicular to the stacked assembly 15. Since the concave and convex portions 16 and the convex portions 17 of the corrugated wave shape are configured so that the optical fiber end 1 is fixedly held corresponding to the convex portions 18A and the concave portions 18B of the side surface concave and convex portions 18 of the accumulation assembly 15, The end portion 1 of the optical fiber is more stably and orderly and firmly fixed, and an extremely efficient, high-precision and high-quality polishing operation can be realized. In particular, polishing unevenness does not occur and the product yield is remarkably improved.

Further, the plurality of optical fiber end portions 1 are inserted into the holding holes 7 of the jig body 6, and the first pressing is performed from the two orthogonal directions X and Y when viewed from the axial direction L ₀ of the holding holes 7. The polishing jig 2 held as the block assembly 15 by the block 21 and the second pressing block 22 is attached to the window portion 4 of the disk 3 having a plurality of mounting window portions 4 opened at equal distribution in the circumferential direction. Since the fixing means 5 fixes and polishes, it is possible to polish the optical fiber end face 10 with high efficiency and high quality without using a conventional adhesive. As a result, productivity and yield can be improved remarkably.

Further, the plurality of optical fiber end portions 1 are inserted into the holding holes 7 of the jig body 6 without using an adhesive on the plurality of optical fiber end portions 1, and the axial direction L ₀ of the holding holes 7 is set. Viewed from two orthogonal directions, pressed and held in the stack assembly 15 and inserted together with the jig body 6 into the window 4 of the disk 3 having a plurality of mounting windows 4. Since it is a polishing method for fixing and polishing, it does not take much time to apply and dry the adhesive, and further to remove and disperse the adhesive after polishing, and the production efficiency can be remarkably improved. In addition, the optical fiber end face 10 to be manufactured is uniformly and stably polished with high accuracy.

DESCRIPTION OF SYMBOLS 1 Optical fiber edge part 2 Polishing jig 3 Disc 4 Window part 5 Adhering means 6 Jig body 7 Holding hole
15 Stacking aggregate
16 recess
17 Convex
18 Side irregularities
18A Convex
18B recess
21 First pressing block
21A First tip
22 Second pressing block
22A Second tip
31 First pressure-receiving surface
32 2nd pressure receiving surface L ₀ axis direction X, Y direction (arrow)

Claims (2)

In a jig for polishing, in which a plurality of optical fiber end portions (1) are inserted into the holding holes (7) of the jig body (6) and fixedly held,
A first press that presses the inserted optical fiber end (1) so as to be able to advance and retreat in two orthogonal directions (X) and (Y) as seen from the axial direction (L ₀ ) of the holding hole (7). A block (21) and a second pressing block (22) ,
When viewed from the axial direction (L ₀ ), the first tip surface (21A) of the first pressing block (21) is linear, and the first tip surface (21A) in the holding hole (7). ) Facing the first pressure receiving surface (31) is linear, and the second tip surface (22A) of the second pressing block (22) is a corrugated wave shape, and the holding hole (7) A polishing jig for an end portion of an optical fiber , wherein the second pressure-receiving surface (32) facing the second tip surface (22A) is an uneven wave type . If N is an integer greater than or equal to 2, N and (N + 1) ones are orthogonally placed between the first tip surface (21A) and the first pressure receiving surface (31) so as to be alternately repeated. The optical fiber end (1) is held as a multi-layer stack assembly (15) toward the direction (X), and the other direction (Y) perpendicular to the stack assembly (15) The concave-convex wave-shaped concave portions (16) and convex portions (17) of the second tip surface (22A) and the second pressure-receiving surface (32) are the convex portions (18) of the side surface concave-convex portion (18) of the accumulation assembly (15). The optical fiber end polishing jig according to claim 1 , wherein the optical fiber end (1) is fixedly held corresponding to the 18A) and the recess (18B) .

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