JPS5898714A - Optical fiber connector base - Google Patents

Abstract

PURPOSE:To prevent an increase of a transmission loss due to the fact that an optical fiber is bent excessively, by fitting a connector base having a holder by which an optical fiber connector can be inserted and drawn out freely, to a connecting box, so that the direction of the holder can be switched freely to the front and the side of the connecting box. CONSTITUTION:A connector base 7 is constituted so that a holder 15 of the connector base 7 is directed to the front or the side of a connecting box 2, by making a rotary shaft 17 freely rotatable around a rotary shaft 17, and replacing hinges 18, 19 to the connecting box 2. Therefore, even if an optical fiber 5 is wound and bent in the wide width direction of width of the connector base 7 and its radius is taken large, when an optical fiber connector 28 is inserted into the holder 15 or the connector 28 is drawn out, the inserting or drawing-out work can be executed easily by directing the holder 15 to the front of the connecting box 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical fiber connector base used, for example, when connecting an optical fiber of an underground optical cable and an optical fiber of an overhead optical cable.

In communication cables, branch connections are made from underground cables to overhead cables. This applies not only to metal conductors but also to optical fiber cables.

Conventionally, in order to connect an optical fiber cable, as shown in FIG. 1, a connector base b' is installed in a connection box a, and an optical fiber connector is inserted into and removed from a holder C attached to the connector base b'. Further, when connecting optical fiber cables, an extra length is provided at the end of the optical fiber so that tension is not directly applied to the connecting portion or for vertical processing of the connecting portion. These extra lengths are wound around a bobbin d provided in the connection box a and stored all together in the connection box. When storing the extra length of the fiber in a junction box with a narrow depth, it is better to wind the extra length in the width direction of the junction box where the winding diameter can be increased, rather than winding it in the depth direction of the junction box. Further, when inserting the optical fiber connector into the holder C of the connector base b, it is possible to easily insert it in a natural posture by inserting it from the front direction of the junction box a to the depth direction. However, if the optical fiber is wound in the width direction of the junction box and oriented toward the front of the holder CF junction box, in order to insert the optical fiber connector into holder C, the connector must be pulled out to the front of the junction box. There are problems in that the work is troublesome and that the optical fiber is bent excessively near the connector, increasing transmission loss.

In order to solve all of these various problems, the present invention allows the holder of the connector base to face the front of the junction box when inserting and extracting the optical fiber connector, and normally faces the holder to the side of the junction box. ’. The present invention will be explained below based on the drawings.

In Fig. 2, (1) is an underground optical fiber cable, which is introduced from the bottom of the junction box (2) into the same phase (2) and connected to the fixing device (2).
3) Fix it to the bottom plate (4).

(5) is an optical fiber from which the jacket layer of an underground feeder optical cable has been removed, and (6) is a protector such as a spiral sleeve or flexible tube placed over the outer periphery of the optical fiber.

(7) is a connector base that is a feature of the present invention, and as shown in Fig. 3, it is a rectangular box with a reed and a fixing device for fully converging and passing the optical fiber (5) through the inner surface of the bottom plate (8). (9) Full installation, partition plates (2) are provided inside at appropriate intervals, and the extra length accommodation part a21'''x shadow formation is made in which the optical fiber extra length part αυ can be accommodated between each partition plate (10).Partitions The entrance side end a31 of the plate 00) is bent downward and inward to prevent the optical fiber (5) from getting caught on the end αa of the partition plate α0.

In addition, there is an optical fiber (5
) is attached to a large number of holders (Is'!r).

Furthermore, a pipe α6) is formed at the corner of the connector base (7), and a rotating shaft a'7) is attached to the connection box (2).
Pass the reed through it so that it can rotate freely, and attach the reed to the reed holder Q'
li) is designed to be freely rotatable from a state facing the lateral direction of the junction box (2) (to the right in FIG. 2) to a state facing the front of the junction box (2).

(1) Connector base (hinges formed on the two sides of the upper end of the force; when the hinges marked α are attached to the connection box (2) with screws, the holder 0 will face in the horizontal direction of the connection box (2). , (1
Attach the wing hinge to the connection box (2) and the holder (15)
should face the front of the junction box (2).

In Figure 2, (20) is an overhead optical cable, which is connected from the bottom of the junction box (2) in the same way as the underground optical fiber cable (1).
Introduce it into the box and fix it to the bottom plate (4) using a fixture (2υ).

(2) is an optical fiber with the jacket layer of an overhead optical cable removed, (23) is a protector such as a spiral sleeve or flexible tube placed around the outer circumference of the optical fiber, and (24) is a junction box in which the optical fibers are bundled. (2) a focusing fixture to be fixed to;
(25) is an extra length accommodating body for accommodating the extra length part (26)ffi of the optical fiber, (27) is the optical fiber guide attached to the side of the holder a9 of the connector base, and the holder is the optical fiber (22)
1, which is an optical fiber connector that can be inserted into and removed from the holder Q51, is attached to the extra length storage body Q9 and the optical fiber guide body (a two-force optical fiber support, as shown in Fig. 4). It is a combination of two or four rubber blocks.

As described above, the present invention is achieved by replacing the hinge (lIH') on the connector base (the force is rotatable around the axis of rotation 1) and the connection box (2). The holder (15) of the connector base (7) can be oriented toward the front of the junction box (2) or to the side, so the optical fiber (5) can be attached to the connector base (with a wide width of force). Even if the bending radius is increased by winding it in the same direction, the same connector (28) inserted into the holder (lω)
28) When pulling out the holder 09 all connection box (
2) By facing the front, the insertion and removal operations can be easily performed. Furthermore, after the insertion and extraction operations are completed, the holder (15) can be turned to the t-side, so that the bending radius of the optical fiber (5) does not become small and the transmission loss does not increase.

Furthermore, if the connector base (7) is made rotatable as described in claim 2, the orientation of the holder 0ω can be changed extremely easily.

Furthermore, if the extra length accommodating part a21t is formed in the connector base (7) as described in claim 4, the optical fiber extra length 0υ can be wound and accommodated in an orderly manner without reducing the bending radius. This eliminates the possibility of the optical fibers (5) becoming entangled or damaged within the junction box (2).

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the conventional optical fiber connection state, FIG. 2 is an explanatory diagram of the use of the optical fiber connector base according to the present invention,
FIG. 3 is an explanatory diagram of the connector base, and FIG. 4 is an explanatory diagram showing an example of blocks constituting the optical fiber guide. . (2) is a junction box, (5) (221 is an optical fiber, (7)
is the connector base, 00) is the partition plate, 0υ (□□□ is the optical fiber extra length part, (12+ is the extra length accommodation part, α9 is the holder, (2 mark is the optical fiber connector).

Claims (1)

[Claims] (A connector base having a holder into which a 1'l optical fiber connector can be inserted and extracted is attached to the junction box so that the orientation of the holder can be switched between the front and side of the junction box. (2) The optical fiber connector according to claim 1, wherein the connector base is rotatably attached to the junction box so that the orientation of the holder of the connector base can be changed to become a plug. Base. (3) The optical fiber connector base according to claim 1, wherein the direction of the υ holder can be changed by changing the direction of the connector base and attaching it to the connection box. (4) Connector An optical fiber connector base according to claim 1, 2, or 3, wherein an extra length accommodating portion is formed in the base to accommodate the extra length of the optical fiber;