JP2006023689A - Component and method for holding/fixing optical fiber covering cord - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a component and method in which an optical fiber covering cord is firmly held and fixed without causing breaking or falling of an optical fiber and in which the component can be easily attached, in connecting optical fibers. <P>SOLUTION: A collet chuck is conically shaped at both ends and cylindrical in the external shape, having two or more slits in the longitudinal direction, with a covering cord housed in the center of the cylindrical section. In addition, the center of the conically shaped section is provided with a bore smaller than the outer size of the covering cord and suitable for a covering cord chuck. The collet chuck fixing component is cylindrical and provided with a bore equal to the outer diameter of the body to be engaged with. One end of the fixing component is such that the bore is protruding in a convex shape, with the convex having a taper along the conical shape of the collet chuck. By screwing in the collet chuck fixing component in the direction tightening the chuck part, the chuck part of the collet chuck is tightened in the component for holding/fixing an optical fiber covering cord. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a component and method for firmly gripping and fixing an optical fiber coated cord that does not break or drop off when the optical fiber is connected.

In recent years, with the spread of the Internet, the volume of information distribution has increased, and the demand for optical fiber connection has been increasing. Optical fiber connection is not limited to connecting optical fibers to each other with a low connection loss. There is a demand for a highly reliable gripping and fixing component and method that are strong fixing that does not break or drop off the fiber, and that can be easily attached at the connection site.

As a method for holding and fixing the optical fiber-coated cord, an adhesive, a fixing method by caulking, a press-contact fixing method using a wedge 1 as shown in FIG. There is a method of holding and fixing with a collet which is also this method (see Patent Document 1 and Patent Document 2).
"Optigate Optical Network Wiring System Product Solution Catalog 2004/1 Sumitomo Electric p.36 Field Assembly Type Connector Fiber Fixing Mechanism" “Patent Publication No. JP-A-08-278428” "Patent Publication No. JP-A-10-31129"

Mechanical splices or simple assembly type connectors can be easily assembled at the connection site, and can be connected to optical fibers with low connection loss. Adhesives and caulking are fixed so that optical fibers do not break or fall off even after connection. Alternatively, the optical fiber-covered cord portion is held and fixed by pressure contact with a spring force.

In the above-mentioned fixing method of the optical fiber coated cord, particularly when fixing an outer diameter φ 0.25 mm thin cord, at the time of connection or after connection such as optical fiber bending or dropping or deterioration of connection loss characteristics due to disconnection over time However, there is a need for a gripping and fixing component and a gripping and fixing method that are safe and highly reliable and can be easily attached at the connection site.

As a method for solving such a problem, there is a grip fixing method using a collet chuck part or a collet chuck fixing part, and the inner diameter of the chuck part grips and fixes the optical fiber coated cord with an appropriate strength without damaging the optical fiber. It has a shape and can be secured and fixed with safety and reliability, and can be easily attached at the connection site.

The present invention has been made in view of such circumstances, and its purpose is to firmly fix the optical fiber without bending or dropping, and furthermore, an optical fiber-coated cord that can be easily attached at the connection site. It is intended to provide a grip fixing part and a grip fixing method.

According to the present invention, there is provided a grip fixing component and a grip fixing method for an optical fiber coated cord, and the coated cord can be firmly fixed with an optimum strength by the collet chuck component and the collet chuck fixing component. Provided are a gripping and fixing component and a gripping and fixing method for an optical fiber coated cord that can be easily attached.

In the grip fixing component and the grip fixing method of the present invention, the collet chuck component for clamping is connected in a cylindrical shape with one end constricted in a conical shape or a widened shape, and is connected in the longitudinal direction. The center of the cylindrical portion is the inner diameter of the outer diameter of the coated cord and accommodates the coated cord, and the center of the cone-shaped portion is based on the outer diameter of the coated cord suitable for the coated cord chuck. A part with a small inner diameter.

Further, the collet chuck fixing part has a cylindrical outer shape, has an inner diameter of a mating body outer diameter, one end protrudes in a convex shape, and a protruding surface is tightened in a conical shape of the collet chuck. If the outer diameter of the collet chuck cone shape is tight, or the shape of the collet chuck cone shape is tightened, use the combination of the tightened inner diameter shapes to increase the collet chuck cone shape outer diameter. If it is a different shape, it will be used in combination with a similarly expanded inner diameter shape.

The collet chuck is inserted and stored in the inner diameter of the collet chuck fixed part. The tapered surface of the conical part of the collet chuck and the inner diameter tapered surface of the collet chuck fixed part are aligned, and the cylindrical side of the collet chuck is inserted into the main body. .

The collet chuck is opened and closed by sliding the collet chuck fixing component and tightening the conical shape portion of the collet chuck with an inner diameter tapered surface.

The method of slidingly fixing the collet chuck fixing part is performed by screwing or using a spring force by a spring.

The collet chuck part or the collet chuck fixing part can be easily processed and manufactured by processing by cutting, grinding or molding using metal or plastic as a material.

The optical fiber coated cord gripping and fixing part and the gripping and fixing method of the present invention enable strong fixing without bending or dropping of the optical fiber regardless of the outer shape of the coated cord, and can be easily attached at the connection site. became.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the holding and fixing component and the holding and fixing method of the present invention will be described, but the present invention is not limited to this.

First, the material for gripping and fixing the optical fiber-coated cord of the present invention is nickel or an alloy thereof, iron or an alloy thereof, copper or an alloy thereof, cobalt or an alloy thereof, aluminum or an alloy thereof, or the like. However, if it is plastic, it is a thermoplastic resin, and general-purpose engineering resin, super engineering resin, etc. can be used. Here, the collet chuck is made of metal, and plastic is used for the collet chuck fixing part.

Next, processing for gripping and fixing the optical fiber-covered cord is processed, but if it is metal, it can be easily processed and manufactured by cutting or grinding, or plastic if it is plastic. Moreover, when using a spring for the slide mechanism of the collet chuck fixing component, a commercially available spring having an optimal spring strength for gripping and fixing may be used.

2 are cross-sectional views of two collet chucks that are gripping and fixing parts.

The newly developed collet chuck has an inner diameter 5 of the outer shape of the coated cord as shown in FIG. 2 (a), and an outer diameter of the inner diameter of the optical fiber connector main body mated at a length of about 20 to 30 mm. 6 is a cylindrical body with one end tightened to a conical shape 7 over a length of about 0.5 mm, and the inner diameter 8 of the conical shape portion is a gently open shape. Has a collet chuck A10 that is smaller than the outer diameter of the coated cord and has an inner diameter suitable for holding and fixing, and an inner diameter 11 of the outer shape of the coated cord as shown in FIG. Is a cylindrical body having an outer diameter 12 of the inner diameter dimension of the optical fiber connection portion main body, and one end of which extends to a conical shape 13 over a length of about 0.5 mm, and the inner diameter 14 of the conical shape portion opens gently. And when chucking The split portion 15 is closed, and the tip is smaller in diameter than the outer diameter of the coated cord and is suitable for holding and fixing. Also, in order to engage and fix the optical fiber connecting portion main body, the cylindrical portion is convex. There is a collet chuck B17 provided with two protruding portions 16 facing each other.

Next, FIG. 3 shows a cross-sectional view of a collet chuck fixing part which is a part for fastening and fixing the chuck portion of the collet chuck.

The newly developed collet chuck fixing part is a cylindrical body with a length of 20 to 30 mm as shown in FIG. One end is an inner diameter 19 projecting in a convex shape over a length of about 0.5 mm, and the projecting surface is a tapered shape 20 along the shape tightened to the conical shape 7 of the collet chuck A10. There is a certain collet chuck fixing part A21, and an inner diameter 22 which is a cylindrical body having a length of about 20 to 30 mm as shown in FIG. One end has an inner diameter 23 projecting in a convex shape over a length of about 0.5 mm, and the projecting surface has a tapered shape 24 that extends along the conical shape 13 of the collet chuck B17. There is an article B25.

When using a spring for holding and fixing the collet chuck, it is a cylindrical body having the same shape as the collet chuck fixing part B as shown in FIG. The cylindrical inner diameter surface is a smooth inner diameter surface 26, one end has an inner diameter 27 projecting in a convex shape over a length of about 0.5 mm, and the projecting surface has a shape that extends into the conical shape 13 of the collet chuck B17. It is assumed that a collet chuck fixing part C29 having a tapered shape 28 is used.

The collet chuck and the collet chuck fixing part are used in a combination of a collet chuck A10 and a collet chuck fixing part A21, a collet chuck B17 and a collet chuck fixing part B25, and a collet chuck B17 and a collet chuck fixing part C29.

Next, FIG. 4 shows a cross-sectional view of three types of gripping and fixing parts mated with the main body 30 of the mechanical splice or the simple assembly connector. 4A is an assembly view of the collet chuck A10 and the collet chuck fixing part A21, FIG. 4B is an assembly view of the collet chuck B17 and the collet chuck fixing part B25, and FIG. 4C is a collet chuck. B17 is an assembly drawing of the collet chuck fixing part C29.

FIG. 4A shows a state in which the conical tapered surface 7 of the collet chuck A10 and the tapered surface 20 protruding in the convex shape of the inner diameter of the collet chuck fixing part A21 are combined, and the collet chuck A cylindrical portion which is the other end is the main body. The collet chuck fixing part A21 is inserted into the inner diameter part 30 and joined to the outer peripheral part 31 of the main body which is threaded.

In FIG. 4B, first, the collet chuck fixing part B25 is screwed into the threaded outer peripheral portion 31 of the main body 30, and then the cylindrical portion of the collet chuck B17 is inserted into the inner diameter portion of the main body 30. The concave groove 32 in which the cylindrical portion convex portion 16 of the collet chuck B17 is accommodated is provided in the inner diameter portion of the main body and fixed.

4 (a) and 4 (b), the collet fixing part is engaged with the threaded outer peripheral portion 31 of the main body 30, but the collet chuck rotates and moves the collet fixing part in the tightening direction. The chuck part is tightened.

FIG. 4 (c) shows a state in which the conical tapered surface 13 of the collet chuck B17 and the tapered surface 28 protruding in the convex shape of the inner diameter of the collet chuck fixing part C29 are combined, and the spring 33 is inserted into the cylindrical portion of the collet chuck B17. After that, while compressing the spring 33, the cylindrical portion is inserted into the inner diameter portion of the main body 30. As in FIG. 4B, the concave portion 32 in which the convex portion 16 of the cylindrical shape fits is provided in the inner diameter portion of the main body and fixed. I will do it.

One end of the built-in spring 33 corresponds to the surface 27 protruding in a convex shape of the inner diameter of the collet chuck fixing part C, and the other end corresponds to the end surface 34 of the joined main body. Therefore, the collet chuck B17 is applied by the spring force of the spring. The chuck part is tightened.

FIG. 5 shows a schematic cross-sectional view of an optical fiber connection section of the assembled holding and fixing part. The optical fiber is connected by the following procedure.

5 (a) and 5 (b) are schematic views of the optical fiber connection cross section of the screw-type gripping and fixing part, but the coating of the end portion of the optical fiber coating cord is removed, the optical fiber is wiped with alcohol, and the end surface is cut with a cutter After adjusting the cut and length on the mirror surface and inserting and connecting the optical fiber through the collet chuck inner diameter part, rotate the collet chuck fixing part A21 or the collet chuck fixing part B25 in the direction in which the collet chuck part is tightened, and firmly Secure to.

FIG. 5C is a schematic cross-sectional view of an optical fiber connection of a holding and fixing part using a spring. The collet chuck fixing part C is slid in the direction in which the spring compresses, the chuck portion is opened, and the end of the optical fiber coated cord After removing the coating on the part, wiping the optical fiber with alcohol, cutting the end face into a mirror surface with a cutter and adjusting the length, inserting and connecting the optical fiber through the collet chuck inner diameter part, then opening the spring and releasing the spring The optical fiber cord is firmly fixed using force.

The collet chuck has an inner diameter that is smaller than the shape of the optical fiber covered cord to be fixed, so that it can be firmly gripped with a high tensile strength, and it has an inner diameter that does not damage fragile optical fibers. In addition, it is possible to realize a highly reliable holding and fixing of the optical fiber coated cord.

It is the schematic which showed the pressure welding fixing method of the optical fiber. (A) Schematic diagram before pressing and fixing (b) Front and rear views It is sectional drawing which showed the collet chuck. (A) Collet chuck A (b) Collet chuck B It is sectional drawing which showed the collet chuck fixing component. (A) Collet chuck fixing part A (b) Collet chuck fixing part B (c) Collet chuck fixing part C It is assembly sectional drawing which showed the holding | grip fixing component. (A) Assembly drawing A (b) Assembly drawing B (c) Assembly drawing C It is the cross-sectional schematic which showed the optical fiber connection of the holding | grip fixing component. (A) Optical fiber connection cross-sectional schematic diagram of assembly diagram A (b) Optical fiber connection cross-sectional schematic diagram of assembly diagram B (c) Optical fiber connection cross-sectional schematic diagram of assembly diagram C

Explanation of symbols

1 Wedge 2 Holding Plate 3 V Groove Plate 4 Clamp Member 5 Collet Chuck A Inner Diameter 6 Collet Chuck A Outer Diameter 7 Collet Chuck A Conical Part 8 Collet Chuck A Conical Part Inner Diameter 9 Collet Chuck A Split Part 10 Collet Chuck A
11 Collet chuck B inner diameter 12 Collet chuck B outer diameter 13 Collet chuck B conical part 14 Collet chuck B conical part inner diameter 15 Collet chuck B split part 16 Projection 17 Collet chuck B
18 Collet chuck fixing part A Threaded inner diameter 19 Collet chuck fixing part A Projecting inner diameter 20 Collet chuck fixing part A Taper shape 21 Collet chuck fixing part A
22 Collet chuck fixing part B Threaded inner diameter 23 Collet chuck fixing part B Projected inner diameter 24 Collet chuck fixing part B Taper shape 25 Collet chuck fixing part B
26 Collet chuck fixing part C Cylindrical inner diameter surface 27 Collet chuck fixing part C Projected inner diameter 28 Collet chuck fixing part C Taper shape 29 Collet chuck fixing part C
30 Main body 31 Threaded outer peripheral portion 32 Main body inner diameter concave groove 33 Spring 34 End face of main body mated

Claims (6)

It is composed of a collet chuck that holds the optical fiber coated cord and a collet chuck fixing part that opens and closes the collet chuck, and the collet chuck fixing part is screwed or slid in the direction in which the collet clamp is tightened. An optical fiber coated cord gripping and fixing component and a gripping and fixing method characterized by having a structure for chucking an optical fiber coated cord. The collet chuck is connected in a cylindrical shape with one end conically tightened or widened, and is divided into two or more parts in the longitudinal direction. The center of the cylindrical part is covered. The inner diameter of the cord outer shape, containing the coated cord, and having a smaller inner diameter than the coated cord outer shape suitable for the coated cord chuck at the center of the conical shape portion, and the cylindrical shape portion accommodating the optical fiber connection portion 2. The gripping and fixing component for an optical fiber-coated cord and a gripping and fixing method according to claim 1, wherein the gripping and fixing component is inserted into the main body, adjacent to the optical fiber connecting portion, and engaged. The collet chuck fixing part has an inner diameter of the outer diameter of the main body containing the optical fiber connection portion that is mated with a cylindrical outer shape, one end of which protrudes in a convex shape, and the protruding surface is the aforementioned collet chuck 2. A conical tightened shape or a tapered shape along an expanded shape, and the collet chuck fixing part is clamped on the conical shape portion of the collet chuck with an inner diameter tapered surface. Or a holding and fixing part and a holding and fixing method for the optical fiber-coated cord according to 2; The collet chuck is stored in the inner diameter of the collet chuck fixing part. If the collet chuck conical shape outer diameter is tight, the collet chuck fixing part inner diameter is a combination of the inner diameter and the collet chuck conical shape. 4. The grip fixing component and the grip fixing method for an optical fiber-coated cord according to claim 1, wherein the collet chuck fixing component has an inner diameter widened if the outer diameter of the collet chuck is widened. . 5. The grip fixing part and the grip fixing method for an optical fiber-covered cord according to claim 1, wherein the collet chuck fixing part is slid and fixed by screwing or a spring force by a spring. An optical fiber-covered cord gripping and fixing component and a gripping and fixing method, wherein the optical fiber-coated cord is gripped and fixed by the method according to any one of claims 1 to 5.

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