JP2863497B2 - Optical fiber connection box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an optical fiber connection box.

[0002]

2. Description of the Related Art An optical fiber connection box provided with an optical fiber connector and a fusion tray is used for connecting an optical fiber cable. FIG. 7 is a view showing an example of a conventional optical fiber connection box, in which a connector 1 is arranged at the center, a fusion tray 2 is arranged at the upper center, and an extra length of the optical fiber is provided at a position adjacent to the connector 1 therebetween. The holder 3 is arranged. A clamp 4 is provided at a lower portion. The optical fiber cable is drawn into the inside of the connection box via the clamp 4, enters the fusion tray 2, is wound around the extra length holder 3, and is connected by the central connector 1. ing.

As described above, in the optical fiber connection box, since the optical fiber cable drawn into the connection box is routed outside the extra length holder 3, the outer side of the extra length holder 3 and the side wall of the junction box are provided. It was necessary to provide a sufficient wiring space. For this reason, it is necessary to make the width of the connection box wider by that much, and a problem remains in terms of space saving.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems and to provide an optical fiber connection box excellent in space saving.

[0005]

SUMMARY OF THE INVENTION An optical fiber connection box according to the present invention, which has been made to solve the above-mentioned problems, comprises an optical fiber connection box having an extra length holder.
The optical fiber cable is characterized in that the optical fiber cable is obliquely lifted from the base toward the direction of the connector arranged adjacently, and passes through the gap between the extra length holder and the base.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. FIG. 1 is a front view showing the internal structure of an optical fiber connection box according to the present invention. As in the prior art, 1 is an optical fiber connector arranged at the center of the connection box, 2 is a fusion tray arranged at the upper center, 3 Is a resin extra-length holder disposed at a position adjacent to the connector 1, and 4 is a clamp provided at a position where the optical fiber cable is drawn into the connection box and at a position where the optical fiber cable is drawn out of the connection box.

The extra length holder 3 is provided with an arc plate 5 for winding the extra length of the optical fiber on the upper surface, and is fixed to a base 6 attached to a connection box by screws 7. In the present invention, an extra-length holder 3 as shown in FIGS . 2 and 3 is used. As shown in these figures, the extra length holder 3 has one end thereof raised from the base 6 so that an optical fiber cable can be passed through its lower surface. In other words, the extra length holder 3 and the optical fiber cable passing through the lower surface are three-dimensionally crossed.

That is, the extra-length holder 3 shown in FIG. 2 has a structure in which the entire portion is inclined except for an attachment portion 8 to the base 6 and the end portion is obliquely raised. The extra length holder shown in FIG.
The damper 3 has a structure in which the whole is inclined and a tongue piece 12 is hung down at an end thereof. The tongue piece 12 also functions as a wiring holder for holding the optical fiber cable. The wiring holder as in FIG. 4 in extra length holder 3 in FIG. 2
11 can be installed.

If such an extra-length holder 3 is used, FIG.
The optical fiber cable can be passed between the end of the extra length holder 3 and the base 6 as shown in FIG. For this reason, it is not necessary to provide a wiring space for passing the optical fiber cable outside the extra-length holder 3, and the width of the connection box can be made narrower than in the related art, thereby saving space.

[0010] In the present invention, FIG. 2, the extra length holder 3 in which the entire obliquely as shown in FIG. 3, as excess length shown in FIG. 5
Towards the connector located next to the holder 3
The connector 1
The operation of attaching and detaching the optical fiber to and from the optical fiber can be performed more smoothly. For this reason, the extra-length holder 3 can be made to approach the connector 1 without impairing the operability, so that the space saving can be further improved.

Although a junction box having no side wall on the body side as shown in FIG. 6 has an advantage that the wiring operation is easy, there is a possibility that the optical fiber which protrudes in the lateral direction when the cover is put on may be disconnected. There is. Therefore, in such a case, it is preferable that the cover 16 be closed after the shield plate 14 having the strong side wall 13 is attached to the body by the attachment latch 15. Further, if the shield plate 14 is made of a transparent material, it is possible to easily confirm whether or not the wiring inside the shield plate has protruded.
Installation work becomes easier.

[0012]

Fiber junction box of the present invention as described above, according to the present invention is lifted one end of the extra length holders from the base, by passing a fiber optic cable into the gap between the extra length holder and the base, the wiring space This eliminates the necessity of being provided outside the extra-length holder, thereby improving space saving. Also, place the extra length holder adjacent to
Since the connector is slanted toward the connector, the operation of attaching and detaching the optical fiber to and from the connector can be performed more smoothly.

[Brief description of the drawings]

FIG. 1 is a front view showing the internal structure of an optical fiber connection box of the present invention.

FIG. 2 is a perspective view of an extra-length holder.

FIG. 3 is a perspective view of another extra-length holder.

FIG. 4 is a cross-sectional view showing a modified example of the extra-length holder.

FIG. 5 is a cross-sectional view showing a relationship between a surplus holder and a connector.
It is.

FIG. 6 is an exploded perspective view showing a modification of the connection box.

FIG. 7 is a front view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connector 2 Fusing tray 3 Extra length holder 4 Clamp 5 Arc plate 6 Base 7 Screw 8 Mounting part 9 Rising part 10 Flat surface 11 Wiring holder 12 Tongue piece 13 Side wall 14 Shield plate 15 Mounting latch 16 Cover

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G02B 6/00 336 G02B 6/24

Claims (1)

(57) [Claims] 1. An optical fiber connection box having an extra length holder, wherein the extra length holder is disposed adjacent to the connector.
An optical fiber connection box characterized in that the optical fiber connection box is made to rise obliquely from the base in the direction of and the optical fiber cable is passed through the gap between the extra length holder and the base.