JPS59107317A - Wiring method in connecting box for optical cable - Google Patents

Abstract

PURPOSE:To improve the workability by fetching a fiber of one unit portion, from a trough, fitting it in order to a wire arranging guide, subsequently, connecting the fibers coming from the left and right by making them have a sufficient overall length, and fixing them to a connecting part holder. CONSTITUTION:A fiber trough 1, an optical fiber wire arranging guide 2, a connecting part holder 3, a locking saddle 4, an optical fiber 5, and an optical fiber connecting part 6 are provided. As for the fiber trough 1, a cover can be fitted from the front, so that the fiber 5 can be taken out from the side face. The optical fiber wire arranging guide 2 consists of a soft rubber, and it is provided with a projection for making the fiber 5 have a suitable bending radius, and a V-groove slit for fixing the fiber 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a wiring method within an optical fiber cable junction box.

[Conventional technology and its defects]

Conventionally, in this type of box, as shown in FIG.
After storing the fiber in the 4-piece holder J4, the remaining length of the fiber was made as circular as possible. However, with this method, the problem is that the overall size of the box becomes thicker when the number of cores increases, and since the length of the extra length varies, the result is a circle that is smaller than necessary rather than a clean circle, resulting in transmission loss. There was a problem that the image became stiff.

[Description of the technology of the present invention]

The present invention eliminates such problems, and will be explained below with reference to FIGS. 2 to 41.

In Figure 2, 1 is a fiber trough, 2 is an optical fiber alignment guide, 3 is a connection holder, 4 is a long king saddle, and 5 is a fiber trough.
is an optical fiber, and 6 is an optical fiber connection portion. The trough 1 can be equipped with a hook from the front, and the fiber 5 can be taken out from the side. The optical fiber alignment guide 2 is made of soft rubber, and has protrusions 2-] for giving the fiber an appropriate bending radius, and a VS for fixing the fiber.
There is a slit 2-2. Figure 3 (a), (b), (c)
Details are shown below. The connection part holder 3 is made of soft rubber and holds the connection part. The 40 rocking saddle is made of plastic and is shown in Figures 4 (a) and (b).
As shown in , when the lock is not completed, the fiber can enter and exit from the opening 4-1 as shown by the dotted line.

The structure of the locking saddle is not limited to that shown in the drawings, but may be any structure that can insert an appropriate number of optical fibers through the opening and hold them loosely.

In the actual connection method according to the method of the present invention, 1 unit of fibers (the number of optical fibers to be made up of 1 unit can be determined as appropriate) is taken out from the trough of sweet potato 1, and Attach them in the order shown in Figure 2.

Next, the fibers coming from the left and right sides are connected with sufficient extra length and fixed to the connection part holder 3. When you have finished fixing the connection parts for 1 unit, put together the extra length of all the units to make a circle that is at least larger than the spacing between the locking saddles 4, and when you fix it to the rocking saddles, the extra length will be in the shape of an ellipse. Fix it in place.

[Effects of the present invention]

According to the method of the present invention, (1) the extra length of the unit is fixed to the locking saddle, so the dimension is approximately 1/1/2.
It becomes smaller than 3. Also, by using a line alignment guide,
Fiber identification becomes clear.

Further, since the optical fiber is formed into a circle larger than the distance between the locking saddles and then fixed to the saddle in an elliptical shape, the minimum radius of curvature of the optical fiber is defined, which reduces the increase in transmission loss and improves workability.

[Brief explanation of the drawing]

FIG. 1 shows a conventional wiring method, FIG. 2 shows an example of the wiring method of the present invention, FIG. ) and (b) indicate a rocking saddle according to the present invention. In the figure, 1 is a fiber trough, 2 is an optical fiber alignment guide,
3 is a connection part holder, 4 is a locking saddle, 5 is an optical fiber, and 6 is an optical fiber connection part. (a) (.)'7t4 figure

Claims (1)

[Claims] (1) In a wiring method in a junction box that accommodates optical fiber connections, the optical fibers on both sides are connected to each other in each unit, and the optical fibers in the unit are connected to the V-groove line guide.
After passing the wires through the grooves and aligning them, each of the hindlimb connecting parts with the optical fibers connected is fixed to a connecting part holder, and then the excess length of the optical fibers on both sides of the connecting part for one unit are gathered together and one end is secured. Roll it into a circular shape with a diameter larger than the distance between the two openings of each of the two locking saddles, and assimilate the circular excess length and store it in each of the two rocking saddles. A wiring method in an optical cable junction box, characterized by: