JP2001281463A - Structure for processing extra length of optical fiber cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for processing extra length of an optical fiber cable, that eliminates work for an operator to save the minimum radius for the extra length while allowing such radius to be secured even if the cable is pulled, that enables the cable to be led in or out from either directions, and that facilitates adjustment of the cable length. SOLUTION: A cable storing guide 3 is rotatable relative to the cable storage part 1 formed roughly cylindrically and is equipped with a part for holding a cable. A plurality of such cable storing guides 3 are arranged radially on the outside of the cable storage part 1. The cable holding part of the storing guide 3 is designed to be a V-shaped groove 31 formed by making a notch in a part of the guide 3. It is desirable that a projection 32 is provided for the V-shaped groove 31 as a structure for preventing the cable from falling off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extra length processing structure for an optical fiber cable, and more particularly, to securing a minimum extra radius.
The present invention relates to an optical fiber cable surplus length processing structure capable of being securely accommodated without being affected by the length of an optical fiber cable.

[0002]

2. Description of the Related Art Hitherto, various structures have been proposed as optical fiber cable (hereinafter abbreviated as "cable") extra length processing structures.

For example, Japanese Patent No. 2824520 discloses a cable extra length processing structure in which a flexible turf having a curled portion at the tip is planted on one surface and a loop is disposed on the material. And a surplus portion including a fusion spliced portion of an optical fiber embedded in the turf. Then, the extra length of the optical fiber is arranged in a loop on the flooring material, and the cable can be accommodated simply by embedding it in the lawn, and the extra length can be adjusted without adjusting the length of the extra length to a specific length. It is configured so that long processing can be easily performed.

On the other hand, the optical fiber extra-length processing box described in Japanese Utility Model Laid-Open No. 2-85402 has a reel for winding an extra length of cable in an outer box, and is wound around the reel in the outer box. Since the split type flexible elastic body that holds the cable is housed, it is possible to secure a minimum surplus radius that does not cause an increase in transmission loss or breakage, and the extra length of the cable is loosened around the reel. However, it is configured so that the occurrence of entanglement can be prevented.

[0005]

However, the above-mentioned patent No. 2
In the cable excess length processing structure of No. 824520, as a first problem, since it is necessary to arrange the excess length of the optical fiber in a loop on the laying material, it is necessary to work while securing a minimum excess radius. There is a problem that the extra processing takes a long time.

Also, as a second problem, since a structure for securing a minimum surplus radius is not provided, if tension is applied to a cable which has been subjected to extra length processing in a loop on a laying material, the cable is pulled. However, there is a problem that it becomes difficult to secure the minimum surplus radius.

On the other hand, in the optical fiber extra length processing box described in Japanese Utility Model Laid-Open No. 2-85402, it is not necessary to take a long time to work while securing the extra length radius, and even if tension is applied to the cable, Although it is possible to secure the minimum surplus radius, since the introduction and exit directions of the cable into the optical fiber extra length processing box are limited, there are cases where the cable cannot be introduced or derived from the desired direction. There is a problem that the range of use is limited.

In view of the above, the present invention has been made in view of the above-mentioned problems in the conventional cable extra length processing structure, and it is not necessary for an operator to work while securing a minimum extra length radius, and the cable is pulled. Provide a cable surplus length processing structure that can secure a minimum surplus radius even in a case where a cable can be introduced or led out from any direction and can easily cope with the length of the cable. The purpose is to:

[0009]

According to a first aspect of the present invention, there is provided a cable extra-length processing structure which is rotatable with respect to a substantially cylindrical cable accommodating portion. In addition, a plurality of cable accommodation guides having a grip part for gripping the cable are radially arranged outside the cable accommodation part.

According to the first aspect of the present invention, the cable is wound and accommodated along the cable accommodating portion and the cable accommodating guide by setting the radius of the outer peripheral surface of the cable accommodating portion to be equal to or greater than the minimum surplus radius of the cable. Therefore, the minimum surplus radius of the cable can be ensured without depending on the judgment and skill of the operator. At this time, the worker does not need to work while securing the minimum surplus radius, so that the surplus length processing work becomes easy.

Further, since the cable does not bend below the radius of the outer peripheral surface of the cable accommodating portion, even when the cable is pulled from the outside, the minimum surplus radius can be reliably ensured.

[0012] Further, since the cable accommodating guide provided with the grasping portion for grasping the cable is rotatable with respect to the cable accommodating portion, it is possible to introduce or lead the cable into or out of the cable accommodating portion from any direction. it can.

Further, when the extra length of the cable is long, the outer cable accommodation guide can be used, so that it is possible to easily cope with the extra length of the cable only by changing the cable route. Can be.

According to a second aspect of the present invention, the grip portion of the cable housing guide is a V-shaped groove formed by cutting out a part of the cable housing guide.

According to the second aspect of the present invention, since the grip portion of the cable housing guide is formed as a V-shaped groove in which a part of the cable housing guide is cut out, by inserting the cable into the V-shaped groove, The cable can be easily held with one touch.

The invention according to claim 3 is characterized in that a cable detachment preventing structure is provided in the V-shaped groove.

According to the third aspect of the present invention, V
Since the cable escape preventing structure is provided in the V-shaped groove, the cable does not easily come out of the V-shaped groove.

According to a fourth aspect of the present invention, a plurality of second cable accommodation guides having slits are provided between the cable accommodation part and the cable accommodation guide so as to be rotatable with respect to the cable accommodation part. It is characterized by having.

According to the fourth aspect of the present invention, since the cable is inserted through the slit of the second cable accommodation guide, the extra length of the cable can be processed using the second cable accommodation guide. In addition, the length of the cable can be easily accommodated.

[0020]

Next, a specific example of an embodiment of a cable extra length processing structure according to the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of a cable extra length processing structure according to the present invention.
It is composed of a cable housing part 1 and a plurality of cable housing guides 2 and 3 arranged outside the cable housing part 1.

The cable housing 1 is formed in a cylindrical shape,
The radius of the outer peripheral surface of the cable accommodating portion 1 is set to be equal to or larger than the minimum surplus radius of the cable to be extra-processed.

A plurality of cable accommodation guides 2 are arranged rotatably with respect to the cable accommodation part 1 and radially outside the cable accommodation part 1. FIG. 1 shows the cable accommodation guide 2.
The slit 21 is formed as shown in FIG.
(FIG. 2) can be inserted.

A plurality of cable accommodation guides 3 are arranged rotatably with respect to the cable accommodation part 1 and radially outside the cable accommodation part 1. As shown in FIG.
As shown in FIG. 5, a V-shaped groove 31 is formed as a holding portion for holding the cable 4. As shown in FIG. 4, a plurality of protrusions 32 are provided on the inner wall of the V-shaped groove 31 as a cable disconnection preventing structure.

Next, the operation of the cable surplus length processing structure having the above configuration will be described with reference to FIG.

The cable 4 is grasped and fixed by being sandwiched in the V-shaped groove 31 of the cable accommodation guide 3, and the tension member of the cable 4 is separated. Here, since the cable accommodation guide 2 and the cable accommodation guide 3 rotate around the cable accommodation part 1, the cable 4 is introduced from an arbitrary direction by rotating in accordance with the introduction direction of the cable 4. Can be gripped and fixed. In addition, since the cable is gripped by the extra length processing introduction unit, even if the cable is pulled from the outside of the extra length processing unit, it does not affect the inside of the extra length processing unit.

Next, the cable 4 is passed through the slit 21 provided in the cable housing guide 2 and housed in a form wound up in the cable housing portion 1, and the cable housing guide radially arranged in accordance with the length of the cable. The cable 4 is accommodated in a form wound around the cable 2 and the cable accommodation guide 3. After housing the cable 4, the cable 4 can be sent out in any direction via the cable housing guide 3.

[0028]

As described above, according to the first aspect of the present invention, the minimum surplus radius of the cable can be reliably ensured, the surplus length processing operation is easy, and the cable can be treated in any direction. Can be introduced or led out to the cable accommodating portion, and a cable extra length processing structure can be provided that can easily cope with the extra length of the cable simply by changing the cable route.

According to the second aspect of the present invention, by inserting the cable into the V-shaped groove, the cable can be easily held with one touch, and the extra-length processing operation is simpler. Can be provided.

According to the third aspect of the present invention, there is provided a cable extra-length processing structure capable of securely holding a cable with a simple configuration without the cable being easily pulled out of the V-shaped groove. can do.

According to the fourth aspect of the present invention, it is possible to provide a cable surplus length processing structure that can easily cope with the length of the cable and that can easily perform the surplus length processing operation.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing one embodiment of a cable extra length processing structure according to the present invention.

FIG. 2 is a top view showing the extra cable length processing structure of FIG. 1;

FIG. 3 is an enlarged perspective view showing a cable accommodation guide of the cable extra-length processing structure of FIG. 1;

FIG. 4 is an enlarged view showing a V-shaped groove-shaped grip portion of the cable housing guide of FIG. 3 and a cable drop prevention structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cable accommodation part 2 Cable accommodation guide (inside) 3 Cable accommodation guide (outside) 4 Cable 21 Slit 31 V-shaped groove 32 Projection

Claims (4)

[Claims] A cable accommodating guide rotatable with respect to a substantially cylindrical cable accommodating portion and having a grip portion for gripping an optical fiber cable is provided radially outside the cable accommodating portion. An optical fiber cable extra length processing structure, characterized in that a plurality of them are arranged. 2. The extra length of an optical fiber cable according to claim 1, wherein the grip portion of the cable accommodation guide is a V-shaped groove formed by cutting out a part of the cable accommodation guide. Processing structure. 3. An optical fiber cable extra length processing structure according to claim 2, wherein a cable disconnection preventing structure is provided in said V-shaped groove. 4. A plurality of second cable accommodation guides provided with slits are provided between the cable accommodation part and the cable accommodation guide so as to be rotatable with respect to the cable accommodation part. An optical fiber cable extra length processing structure according to claim 1, 2 or 3.