JPH1020169A - Method for fixing high-tensile wire of optical fiber cable and fixing tool therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and efficiently fix a high-tensile wire by inserting the high- tensile wire exposed from an optical fiber cable into the fixing groove of a fixing tool from an opening part, screwing a stop screw (male screw) into a female screw provided in the direction of the depth of the groove and fixing the high-tensile wire. SOLUTION: The high-tensile wire 4 of the optical fiber cable is fixed by the fixing tool 1. The fixing tool 1 has a U-shaped groove 2a having the opening on an upper face, and the high-tensile wire 4 is pushed into the groove 2a from above. The female screw 3a is cut at the center of the groove 2a and the stop screw (male screw) 3b is screwed into is so as to fix the line. Since the high- tensile wire 4 is pushed from the opening part compared to a case when it is inserted into a through hole whose inner diameter is not different from the outer diameter of the high-tensile wire 4 in the length direction like conventional technology, the line can considerably easily be inserted and workability is remarkably improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a fixture for fixing a tensile wire of an optical fiber cable, particularly an optical fiber cable having a tensile wire.

[0002]

2. Description of the Related Art As conventional optical fiber cables, the number of core wires has been increased, and cables using tensile strength wires have been used in many cases. A typical structure has a tensile line 4 at the center as shown in FIG.
2, having an outer peripheral slot groove 103;
3 is a slot type cable 5 in which an optical fiber 101 is inserted and a sheath 104 is provided outside. To fix the tensile strength wire 4, as shown in FIG. 7, the optical fiber core wire 104 and the tensile strength wire 4 are exposed, and the tensile strength wire 4 is retained and fixed by the tensile strength wire fixing tool 10 as shown in FIG. As shown in FIG. 9, a through hole 2d for inserting the tensile strength wire 4 in the direction of the arrow is provided at the center of the fixture body 1, and a female screw 3a is provided at an upper part of the center, and a set screw (male screw) 3b is provided. Was screwed in and fixed. 8 and 9, the set screw is exposed, but is screwed at the position indicated by the dotted line.

[0003]

In this method, since a cylindrical insertion passage 2d for the tensile strength line 4 is provided at the center of the fixture main body 1 for inserting the tensile strength line, the size of the tensile strength line and the cylindrical shape constituting the passage are provided. A design range between the outer diameter of the portion and the outer diameter of the portion is required, and the insertion of the tensile strength wire 4 into the through hole 2d from one end is troublesome on the work surface and inefficient.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above inefficiency, and the outline thereof is as follows. According to the first aspect of the present invention, the tensile strength line exposed from the optical fiber cable is pushed into the fixing groove of the fixture from an open portion, and a set screw (male screw) is screwed into a female screw provided in a depth direction of the groove. A method for fixing a tensile strength line of an optical fiber cable, characterized by fixing a tensile strength line, wherein the invention according to claim 2 inserts the optical fiber cable into a semi-cylindrical cable holding space of a cable holding tool, The cable was held down by a tie wrap inserted into the anchoring device, and the tensile strength wire exposed in the direction of the tip of the optical fiber cable was pushed into the fixing groove of the fixing device from the open portion, and provided in the depth direction of the groove. A method of fixing a tensile strength line of an optical fiber cable, wherein a set screw is screwed into a female screw to fix the tensile strength line. A U-shaped, V-shaped or rectangular fixing groove capable of pushing the exposed tensile strength line through the opening, a female screw formed in the groove in the depth direction, and a set screw screwed into the groove. A tensile strength wire fixing device for an optical fiber cable, wherein the tensile strength wire pushed into the groove is fixed by a set screw.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described with reference to the drawings. FIGS. 1 and 2 show a typical example of a structure used in the retaining and fixing method of the present invention. The tensile strength wire 4 of the optical fiber cable is retained and fixed by the fixing device of the present invention. It has a U-shaped groove 2a having an opening, and the tensile strength line 4 is pushed into the groove 2a in the direction of the arrow from the upper surface. A female screw 3a is cut into the groove 2a substantially at the center of the groove, and a set screw (male screw) 3b is screwed into the female screw 3a so as to be fixed. Although the set screw is exposed in FIGS. 1 and 2, it is screwed into the position indicated by the dotted line and screwed. Therefore, as compared with the prior art shown in FIGS. 8 and 9 in which the tensile strength wire is inserted in the through-hole having an inner diameter that is not so different from the outer diameter of the tensile strength wire in the length direction (the direction of the arrow), Just push in from the open part,
It can be fitted very easily and workability is remarkably good.
FIG. 3 shows the configuration of the groove for pushing in the tensile strength wire 4,
(A) is a U-shaped groove, (B) is a V-shaped groove, (C) is a rectangular groove,
In any case, the tensile strength wire 4 can be easily pushed in from the open portion and fixed. Although the set screw is exposed in FIGS. 8 and 9, it is screwed into the position indicated by the dotted line and screwed.

FIG. 4 shows an example of a mounting structure according to the present invention for fixing a tensile strength wire while fixing a cable such as a terminal box.
The portion of the cable 5 where the sheath is left is applied to the semi-cylindrical cavity 7 provided with the non-slip of the cable fixing device 6 and fastened and fixed by the tie wrap 9 previously inserted into the tie wrap insertion hole 8. The tensile wire 4 of the cable whose end is exposed is fixed to the fixture 1 in the same manner as shown in FIG. The head of the set screw can be positive or negative. The same parts as those in the other drawings are denoted by the same reference numerals, and description thereof will be omitted. Also, while the above description has been given of the slot type optical fiber cable,
Other types of cables can be used to fix the tensile strength wires accordingly.

[0007]

According to the present invention, as described above, the tensile strength wire of the optical fiber cable is pushed in from the upper open portion and then fixed with the set screw.
The work efficiency is also much better than that of the prior art, and if a means for fixing the cable itself is combined, the work end can be fixed even at the end or connection portion of the cable. In addition, in the tensile wire fixing device of the present invention, the tensile wire insertion fixing portion is U-shaped.
Since it is a groove, a V-groove, or a rectangular groove, a tensile strength line can be easily inserted from an open portion without any experience.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a tensile strength wire is fixed to a fixture of the present invention.

FIG. 2 is a side view showing a state in which a tensile strength wire is fixed to the fixture of the present invention.

FIG. 3 is a perspective view of a tensile strength wire insertion portion of the fixing device of the present invention, wherein (A) shows a U-shaped groove, (B) shows a V-shaped groove, and (C) shows a rectangular groove.

FIG. 4 is a perspective view showing a state where the cable fixing device and the tensile strength wire fixing device of the present invention are fixed.

FIG. 5 is a sectional view of a slot type optical fiber cable.

FIG. 6 is a diagram illustrating a state in which an optical fiber and a tensile strength line of a slot type optical fiber cable are exposed.

FIG. 7 is a view for explaining a state in which the tensile strength wire of the cable of FIG. 6 is fixed with a fixture.

FIG. 8 is a front view showing a state in which a tensile strength wire is fixed to a conventional fixture.

FIG. 9 is a side view showing a state in which a tensile strength wire is fixed to a conventional fixture.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixture main body 2a U-shaped groove 2b V-shaped groove 2c Rectangular groove 2d Through hole 3a Female screw 3b Set screw (male screw) 4 Tensile wire 5 Cable 6 Cable fixing device 7 Semi-cylindrical cavity provided with non-slip 8 Tie wrap insertion Road 9 Tie wrap 10 Fixture 101 Optical fiber cable 102 Slot type insulator 103 Slot groove 104 Sheath

Claims (3)

[Claims] 1. A tension line exposed from an optical fiber cable is pushed into a fixing groove of a fixture from an open portion, and a set screw is screwed into a female screw provided in a depth direction of the groove to fix the tension line. A method for fixing a tensile strength wire of an optical fiber cable, characterized in that: 2. An optical fiber cable is inserted into a semi-cylindrical cable retaining space of a cable retaining device, the cable is retained by a tie wrap inserted into the cable retaining device, and the cable is exposed in a tip direction of the optical fiber cable. The tension line is pressed into the fixing groove of the fixture from an open portion, and a set screw is screwed into a female screw provided in the depth direction of the groove, thereby fixing the tension line. How to fix the line. 3. A groove capable of pushing a tensile strength wire exposed from an optical fiber cable from an open portion, a female screw formed in the groove in a depth direction thereof, and a set screw screwed into the groove are provided in the groove. A fixing device for a tensile strength line of an optical fiber cable, wherein the tensile strength line to be pushed in can be fixed by a set screw.