JPH02190803A - Optical fiber splicer - Google Patents

Abstract

PURPOSE:To simply execute a connecting work of an optical fiber by constituting a splicer of a columnar block with a V-groove, a transparent pipe which can contain the block, and a pair of wedges inserted from both ends of the pipe. CONSTITUTION:A columnar block 7 is inserted and placed in the center part in the longitudinal direction in a transparent pipe 5. Subsequently, an end part of an optical fiber 6 is placed in a V-groove 7a of the columnar block 7, and thereafter, a wedge 8 is inserted from both ends of the pipe 5. By following up an insertion of the wedge 8, the optical fiber 6 is gradually inserted and held strongly by the V-groove 7a of the columnar block 7 and the inner wall surface of the pipe 5, and when an acute angle part 8a of the wedge 8 is inserted completely into the cut-off surface 7b of an edge of the columnar block 7, the optical fiber 6 is inserted, pressed and held by the V-groove 7a and the inside wall surface of the pipe 5, and fixed. In such a way, the fixation can be executed simply, comparing with the fixation with a screw.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical fiber splicer, and more particularly to the permanent splicing of optical fibers.

[Conventional technology]

The following fixing methods are known as methods for permanently connecting optical fibers. That is, this method utilizes the uniformity of the dimensional accuracy of the optical fiber and the central axis symmetry of structures such as V-grooves to align the axes, and then fixes them using predetermined fixing means. Therefore, the structural parameters of an optical fiber, such as the non-circularity of the core and the eccentricity of the core and cladding, have a large effect on the splice loss. This poses no practical problem.

Conventionally, this type of optical fiber splicer is as shown in FIG. After aligning the axis by pressing the optical fiber with a presser plate 3, the optical fiber is fixed with screws 4.

[Problem to be solved by the invention]

However, in the conventional optical fiber splicer described above, as shown in FIG.
This method has the disadvantage that a large number of optical fibers are required, and therefore, it takes time to connect the optical fibers.

SUMMARY OF THE INVENTION An object of the present invention was made in view of the above-mentioned drawbacks, and it is an object of the present invention to provide an optical fiber splicer that facilitates the splicing of optical fibers.

[Means to solve the problem]

In order to achieve the above object, the optical fiber splicer according to the present invention includes: a cylindrical block provided with a V-groove in the longitudinal direction in which an optical fiber can be placed; a transparent pipe capable of housing the cylindrical block; The structure consists of a pair of wedges inserted from both ends of the vibrator into the gap between the opposite side of the V-groove of the cylindrical block and the inner wall surface of the pipe.

[Effect]

As described above, in the present invention, since the optical fibers are connected and fixed by a pair of wedges inserted from both ends of the pipe, it is possible to fix the optical fibers more easily than with screw fixing.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a perspective view showing a pipe of an optical fiber splicer according to the present invention, FIG. 2 is a perspective view of a cylindrical block of the optical fiber splicer, and FIG. 3 is a perspective view of a wedge of the optical fiber splicer. FIG. 4 is a cross-sectional view when optical fibers are connected using the same optical fiber splicer.

The material of the pipe 5 in this embodiment is transparent glass, so that the optical fiber 6 inserted into the transparent pipe 5 can be easily seen.

Further, the cylindrical block 7 is made of a plastic member, and a V-groove 7a for placing an optical fiber is provided in the longitudinal direction on its negative side. As is clear from FIG. 2, both ends of the groove 7a are formed so that the cross section of the groove becomes gradually larger toward the outside so that the optical fiber 6 can be easily introduced. Further, in the cylindrical block 7, an edge cut-off surface 7b is provided on the side surface opposite to the side surface where the V-groove 7a is provided. The intersection angle between the cut-off surface 7b of this edge and the axis of the cylindrical block 7 is 1
A temperature of 0 degrees or less is appropriate. In addition, in FIG. 4, the reference numeral 6a
is an optical fiber core.

The wedge 8 is composed of an acute-angled portion 8a at the tip and a cylindrical portion 8b of the body, and the ridge angle at the tip of the acute-angled portion 8a is set to approximately the same angle as the above-mentioned intersection angle. Further, on the side surface of the cylinder III (S8b) of the wedge 8, an optical fiber guide groove 80, which is larger than the outer diameter of the optical fiber 6, is provided in the longitudinal direction.

In the above configuration, when actually connecting optical fibers, the cylindrical block 7 is first inserted into the longitudinal center of the transparent vibrator 5, as shown in FIG. At this time, the V groove 7a of the cylindrical block 7 is set to be on the upper side. After that, the end of the optical fiber 6 is placed in the V-groove 7a of the cylindrical block 7, and then wedges 8 are inserted from both ends of the vibrator 5.
Insert. That is, the wedge 8 is inserted into the gap between the cut-off surface 7b of the edge of the cylindrical block 7 and the inner wall surface of the pipe 5. In this way, the V-groove 7a of the cylindrical block 7 follows the insertion of the wedge 8. The optical fiber 6 is gradually pinched between the inner wall surface of the pipe 5, and when the acute angle part 8a of the wedge 8 is completely inserted into the cut-off surface 7b of the edge of the cylindrical block 7, as shown in FIG. Then, the optical fiber 6 is held under pressure between the V-groove 7a and the inner wall surface of the pipe 5, and is fixed.

〔Effect of the invention〕

As explained above, according to the optical fiber splicer according to the present invention, wedges are inserted from both ends of the pipe into the gap between the opposite side of the V-groove of the cylindrical block and the inner wall surface of the pipe, and thereby The structure is such that the optical fiber is fixed to the inner wall of the vibrator, and because it does not use screws to fix it like in the past, it is possible to connect and fix the optical fiber in a shorter time than in the past. It has excellent effects.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a pipe of an optical fiber splicer according to the present invention, FIG. 2 is a perspective view of a cylindrical block of the optical fiber splicer, FIG. 3 is a perspective view of a wedge of the optical fiber splicer, and FIG. FIG. 4 is a cross-sectional view when optical fibers are connected using the same optical fiber splicer, and FIG. 5 is an exploded perspective view showing an example of a conventional optical fiber splicer. ...Pipe, 6...Optical fiber,...
...Cylindrical block, 7a...V groove, b...
...Edge cut surface, 8...Wedge, a...
...Acute angle part, 8b...Cylindrical part.

Claims (1)

[Scope of Claims] A cylindrical block provided with a V-groove in the longitudinal direction on which an optical fiber can be placed, a transparent pipe capable of accommodating the cylindrical block, and a side surface opposite to the V-groove of the cylindrical block and the pipe An optical fiber splicer comprising a pair of wedges inserted from both ends of a pipe into a gap with an inner wall surface.