JPS5930248B2 - Optical cable connection - Google Patents

Description

[Detailed description of the invention] The present invention relates to a connecting portion of an optical cable.

Generally, when connecting optical cables, when the outer sheath is removed and the exposed optical fiber core wires of each cable are connected, the entire core wire connection section is protected by encasing it in a protector housed within a sleeve. ing.

That is, since the core wire connection part is weak not only against tensile load but also against impact load, this connection part is provided with an extra length, and after being covered with a cushioning material, it is housed in the protector body. Therefore, in the conventional example, two pieces of cushioning material, upper and lower, are applied to the core wire connection part to cover this connection part, and hard press plates are applied to the upper and lower parts of the cushioning material.
In addition, the covered state was fixed by tightening both push plates with bolts and nuts, and the thus covered connecting portion was housed within the protector body.

The protector body containing the connecting portion was fixed to the sleeve using a spacer to prevent it from wobbling within the sleeve. However, in this conventional example, there is a limit to the number of optical fiber cores in order to neatly store the connecting parts of optical fiber cores with extra length, and if too many optical fiber cores are stored, the optical fiber cores will become tangled. A problem arises in that it is difficult to handle. Further, in the conventional example, since there is a spacer for fixing the protector body within the sleeve, the number of parts is large, the structure is complicated, and the work of connecting parts is troublesome. The purpose of Akira Hongen is to solve the above problems, to create an optical cable connection part that uses fewer components, greatly increases the number of connected optical fibers that can be stored, and that can be easily coated and protected. It is on offer.

In order to achieve this object, the present invention consists of a sleeve that protects the outer periphery of the connecting portion of the optical fiber core exposed from the end of the cable and connected in the longitudinal direction, and a bottom plate part and both side plate parts housed within this sleeve. A protector body, a cushion material for holding a connected optical fiber core wire housed in the protector body, and a pusher lid that can be fixed to the protector body by pressing the cushion material from above. In the optical cable connection section, the sleeve can be divided in the longitudinal direction at the center, and both side plate parts of the protector body are formed into a substantially semicircular shape, and the protector body formed in this way has two parts. It is characterized in that the sleeves are assembled back to back as a set and housed so that the side plate portions thereof are in contact with the inner circumferential surfaces of both the divided sleeves.

An embodiment of the optical cable connection part of the present invention will be described below.

In the figure, 1a and 1b are cables, and 2a and 2b are optical fiber core wires exposed from each cable 1a and 1b.

These optical fiber core wires 2a and 2b are connected to each other. Each optical fiber core wire 2a, 2 in this connected state
The bundle b is divided into two parts, and one bundle has a protector body 5a consisting of a bottom plate part 3a and both side plate parts 4a, 4a, as shown in the opening of FIG.
The extra length is wound into a loop shape and stored in the bundle, and the other bundle is a protector body 5 consisting of a bottom plate part 3b and both side plate parts 4b, 4b.
The extra length is similarly wound into a loop and stored in b.
The bottom plate parts 3a, 3b of the protector bodies 5a, 5b are assembled back to back, and the bottom plate parts 3a, 3b are assembled back to back as shown in FIG.
One end 6a, 6b of each is fixed to the end of the cable 1a by a stop 8a, 8a, and at the same time the other end 7a, 7b is fixed to the end of the cable 1b by a stop 8b, 8.
It is fixed by b. Both side plates 4 of protector body 5a
The cross-sectional shape of a and 4a is composed of a flat side surface and an arcuate portion, and the entire side plate portions 4a and 4a are approximately semicircular arc-shaped, and a slight gap is provided at the abutting portions of the two ends. . Further, both side plate portions 4b, 4b of the protector body 5b have the same shape as the protector body 5a. Since the protector body 5a and the protector body 5b are assembled back to back, the center portions of the side plate portions 4a, 4a and the both side plate portions 4b, 4b have a substantially cylindrical shape. The protector bodies 5a and 5b are formed of metal plates, such as aluminum plates, but may also be made of plastic plates. The optical fiber core wires 2a, 2b connected to the protector bodies 5a, 5b having such shapes are housed in the following manner.

The gaps at the ends of the side plates 4a, 4a of the protector body 5a are pushed and expanded to the extent that the optical fiber core wires 2a, 2b wound in a loop shape can be accommodated without getting tangled.
Pay b.

At this time, the loop-shaped optical fiber core wires 2a and 2b have a larger winding diameter due to their own restoring force, and the winding diameter of the loop-shaped optical fiber core wires 2a and 2b increases, and
, 4a and the corner of the bottom plate portion 3a. Similarly, the optical fiber core wires 2a and 2b are housed within the protector body 5b. Furthermore, the optical fiber core wires 2a and 2b in the connected state
After the is set as described above, a cushion material 9 such as a foam made of synthetic resin or the like is applied thereto by means of lids 10, 10, as shown in FIGS. The bottom plate portion 3a of the protector bodies 5a, 5b is secured by a pair of fasteners 11.
, 3b at the same time.

In this way, the protector bodies 5a and 5b containing the optical fiber core wires 2a and 2b are assembled into the protector bodies 5a and 5b as shown in FIG.
, 5b are housed in a sleeve 12 that can house the entire body.

The sleeve 12 can be divided into two parts in the axial direction at the center, and the flanges 13, 13 at the abutting part of the center part are fitted and fixed by a ring 14 which is divided into two parts.

In order to accommodate the protector bodies 5a, 5b in this sleeve 12, they can be fitted by pressing the respective side plate portions 4a, 4a and 4b, 4b smaller than the inner diameter of the sleeve 12. The protector bodies 5a, 5b fitted into the sleeve 12 have their side plates 4a, 4a and 4b, 4b in close contact with the inner circumferential surface of the sleeve 12 due to their respective repulsive forces. At this time, the side plates 4a, 4a and 4b, 4b are in close contact with each other astride the inner circumferential surfaces of both the two halves. Sleeve 12
Both end portions 15, 15 of the cables 15, 15 have tapered tips, and their inner diameters are equal to the outer diameters of the cables 1a, 1b. The sleeve 12 housing the protector bodies 5a and 5b in this manner is coated with, for example, adhesive tape for waterproofing at the abutting portion at the center and at both ends.

As mentioned above, in the optical cable connection part of the present invention, the optical fiber core wire is divided into two parts and can be housed in two protector bodies housed in the sleeve, so there is no need to tangle more optical fiber core wires than in the past. It can be easily delivered. In addition, the number of parts does not increase because the protector body only requires two pieces of the same shape to be assembled back to back.Furthermore, the protector body has a semicircular shape that also serves as a spacer to hold the protector body inside the sleeve. Since it has arcuate side plates, it has the advantage of reducing the number of parts and simplifying assembly.

[Brief explanation of the drawing]

Figures 1A to 1C are a plan view, a sectional view, and a side view showing one step of the procedure for configuring an embodiment of the optical cable connection part of the present invention, and Figures 2A and 2C are respectively of the same embodiment. A sectional view, a plan view, and a partially omitted side view of the same embodiment show a subsequent process. 1a, 1b... Cable, 2a, 2b...
...Optical fiber core wire, 3a, 3b...Bottom plate part,
4a, 4b...Side plate part, 5a, 5b...
・Protector body, 9...Cushion material, 10...
...Oshitobada.

Claims (1)

[Claims] 1. A sleeve that protects the outer periphery of the connection part of the optical fiber core exposed from the cable end and connected in the longitudinal direction, a protector body consisting of a bottom plate part and both side plate parts housed in this sleeve, and this protector body In the connection part of the optical cable, which comprises a cushioning material for holding the optical fiber core wire in a connected state housed in the case, and a pusher lid that presses the cushioning material from the upper surface and fixes it to the protector body, the above-mentioned The sleeve can be divided longitudinally at the center, and both side plate portions of the protector body are formed in a semicircular shape,
Further, two protector bodies formed in this manner are assembled back to back as a set and housed so that both side plate portions thereof are in contact with the inner peripheral surfaces of both the divided sleeves. A connecting part of an optical cable characterized by: