JPH0748084B2 - Optical fiber splicer - Google Patents

Description

TECHNICAL FIELD The present invention relates to an optical fiber splicer, and more particularly to a permanent connection of optical fibers.

[Conventional technology]

The following fixing method is known as a method for permanently connecting optical fibers. That is, it is a method of performing axial alignment by utilizing the uniformity of the optical fiber dimensional accuracy and the central axis symmetry of the structure such as the V groove, and fixing them by a predetermined fixing means. Therefore, the non-circularity of the core and the eccentricity of the core and the clad, which are the structural parameters of the optical fiber, have a great influence on the splice loss, but there are some recent optical fiber dimensions that are controlled with high accuracy. Is not a problem in practice.

Conventionally, this kind of optical fiber splicer has a V-groove connector 1 for connecting fibers (not shown) as shown in FIG.
The optical fiber is set by butting on the V groove 2 provided above, the optical fiber is pressed from the upper portion by the pressing plate 3 to perform axial alignment, and then fixed by the screw 4.

[Problems to be Solved by the Invention]

However, in the above-mentioned conventional optical fiber splicer, as shown in FIG.
However, there is a disadvantage in that it takes a lot of time to connect the optical fibers.

The present invention has been made in view of the above-mentioned drawbacks, and it is an object of the present invention to provide an optical fiber splicer capable of easily connecting optical fibers.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, an optical fiber splicer according to the present invention comprises a columnar block having a V groove in the longitudinal direction in which an optical fiber can be mounted, and a transparent pipe capable of accommodating the columnar block. The cylinder block has a pair of wedges inserted from both ends of the pipe into a gap between the opposite side surface of the V groove and the inner wall surface of the pipe.

[Action]

As described above, according to the present invention, since the optical fibers are connected and fixed by the pair of wedges inserted from both ends of the pipe, the fixing can be simpler than the screw fixing.

〔Example〕

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

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 transverse cross-sectional view when an optical fiber is connected using the optical fiber splicer.

The material of the pipe 5 of this embodiment is made of transparent glass so that the optical fiber 6 inserted and arranged inside the transparent pipe 5 can be easily seen. The columnar block 7 is made of a plastic material, and one side surface thereof is provided with a V groove 7a for mounting an optical fiber in the longitudinal direction. As is apparent from FIG. 2, both ends of the V groove 7a are formed so that the cross section of the groove gradually increases toward the outside so that the optical fiber 6 can be easily introduced. Further, in the cylindrical block 7, an edge cutoff surface 7b is provided on the side surface opposite to the side surface provided with the V groove 7a. The crossing angle between the cut-off surface 7b of the edge and the axis of the cylindrical block 7 is preferably 10 degrees or less. In FIG. 4, reference numeral 6a is an optical fiber core wire.

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 edge of the acute-angled portion 8a is set to be substantially the same as the above-mentioned intersection angle. Also, the cylindrical portion 8b of the wedge 8
A groove 8c for guiding an optical fiber, which is formed to be larger than the outer diameter of the optical fiber 6, is provided on the side surface of the.

In the case of actually connecting the optical fibers with the above configuration, as shown in FIG. 4, first, the cylindrical block 7 is inserted and arranged in the central portion in the longitudinal direction inside the transparent pipe 5. At this time, the V groove 7a of the columnar block 7 is set so as to come to 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 the wedge 8 is inserted from both ends of the pipe 5. That is, the wedge 8 is inserted into the gap between the cut-off surface 7b at the edge of the columnar block 7 and the inner wall surface of the pipe 5. In this way, the V groove 7a of the columnar block 7 follows the insertion of the wedge 8. The optical fiber 6 is gradually strongly sandwiched between the inner wall surface of the pipe 5 and the inner wall surface of the pipe 5, and the acute angle portion 8a of the wedge 8 becomes the fourth position.
As shown in the figure, the cut-off surface 7b at the edge of the cylindrical block 7
When the optical fiber 6 is completely inserted into the optical fiber 6, the optical fiber 6 is pinched and held by the V groove 7a and the inner wall surface of the pipe 5 and fixed.

〔The invention's effect〕

As described above, according to the optical fiber splicer of the present invention, the wedge is inserted into the gap between the opposite side surface of the V groove of the cylindrical block and the inner wall surface of the pipe from both ends of the pipe, and thereby the V groove of the cylindrical block is formed. Since it is configured to fix the optical fiber between the inner wall surface of the pipe and it is not fixed with screws as in the past, it is possible to perform the connection and fixing work of the optical fiber in a shorter time than in the past. It has an excellent effect.

[Brief description of drawings]

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, 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, and FIG. 5 is an exploded perspective view showing an example of a conventional optical fiber splicer. 5 ... pipe, 6 ... optical fiber, 7 ... cylindrical block, 7a ... V groove, 7b ... edge cut-off surface, 8 ... wedge,
8a …… Acute angle part, 8b …… Cylinder part.

Claims (1)

[Claims] 1. A columnar block having a V-shaped groove in the longitudinal direction in which an optical fiber can be mounted, a transparent pipe capable of accommodating the columnar block, a side opposite to the V-shaped groove of the columnar block and the inside of the pipe. An optical fiber splicer comprising a pair of wedges inserted from both ends of the pipe in a gap between the wall surface and the wall.