JPS6147904A - Optical fiber surplus length containing tool - Google Patents

Abstract

PURPOSE:To make a depth size small by superposing plural rectangular and flexible sheets, and providing a choking part, an opening part and its folding part between its long side parts, respectively. CONSTITUTION:One sheet of the first rectangular sheet 9 and plural sheets of the second sheets 10 of the same size are superposed, and one of the parts between long side parts is formed as a depth choking part 14 by connecting each adjacent part by thermal welding. The other is formed as an opening part 13 and a folding part 17 is provided on the side facing the sheet 9. Both end corner parts of the choking part 14 are connected by connecting metallic fittings 15 for the purpose reinforcement. In such a state, a surplus length part 1A of an optical fiber core wire 1, etc. is contained in a long circular loop shape on each second sheet 10, its shape is held by using the folding part 17 and the choking part 14 as stoppers, and also it is prevented from getting out. A fiber connecting part 6 is also contained together, and in a state that all surplus length parts 1A have been contained, both ends are connected by a hook 16. Also, in case that the core wire 1 is formed to a unit by setting plural pieces to one unit, the surplus length part 1A is contained per unit, and the subsequent management can be executed easily.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is suitable for use, for example, in storing the excess length of optical fiber cores or optical fiber cords at the connection surface of optical fiber cables. This invention relates to an optical fiber excess length storage tool.

(Prior Art) At the connection points of optical fibers, etc., an extra length is provided in advance in the optical fibers, etc., adjacent to the fiber connection portion in preparation for reconnection such as connection change.

The excess length of the optical fiber is generally stored in a case in the form of a loop.

Conventionally, the extra length 1A of the optical fiber core 1 etc. is stored in a circular loop shape in a rigid hard case 2 as shown in FIG. 4, or as shown in FIG. It was stored in a circular loop inside a flexible soft case 3. In addition, in the figure, 4 is an optical cable,
Reference numeral 5 designates a connection surface for housing the cases 2, 3, etc., 6 a fiber connection part, and 7 a seam fusion part that IA-bonds the three sides of the soft case 3.

(The problem that the invention is trying to solve) However,
Conventionally, the extra length 1A of the optical fiber core 1 etc. has been wound into a circular loop shape, so the cases 2 and 3 that house it have to be square shaped. Therefore, each case 2. The depth dimension of 3 becomes large, and the radial dimension of the connecting surface 5 becomes large, which has the disadvantage that it cannot meet the demand for slimming the connecting surface 5.

In addition, in the hard case 2, when these hard cases 2 are stacked with the plurality of extra length parts 1A stored in the individual hard cases 2, the stacked thickness of any part is 8 ! As the number of i-layers increases, the radial dimension of the connecting box 5 increases, which has the drawback of going against the trend of slimming the connecting surface 5.

An object of the present invention is to reduce the depth dimension,
To provide an optical fiber surplus length storage tool capable of minimizing the stacked thickness even when stacked.

(Means of the present invention for solving problems) The optical fiber surplus length storage device according to the present invention includes a first sheet having a rectangular shape and having flexibility; A plurality of second sheets are stacked in the same direction, and an opening is formed between the long sides of each sheet on one side in the width direction, and the long side of each sheet on the other side in the width direction Adjacent comrades between the sheets are connected to each other to form a depth closed section, and the short sides on both sides in the length direction of each sheet are connected at least partially in the width direction, and the opening of each second sheet is It is characterized in that the long side portions located in the portions are each provided with a folded portion that is folded back toward the side facing the first sheet.

(Function of the invention) Since such an optical fiber surplus length storage device has a smaller dimension in the width direction, that is, in the depth direction, than in the length direction, the loop-shaped surplus length of the optical fiber core wire etc. is stored in each sheet. They are each stored in the second sheet in an elliptical shape with a major axis in the longitudinal direction. At this time, each of the loop-shaped surplus lengths is pressed by the folded part of the second sheet on the opening side of the surplus length storage device, and is pressed by the depth connecting part on the depth side, so that the surplus length has an oval shape. The shape is maintained and escape is prevented. When taking out each extra length,
The second sheet can be easily taken out by folding the folded portion in the opposite folding direction. Since this extra length storage tool has a small thickness, the radial dimension of the connection surface can be reduced, and the connection surface can be slimmed down. In addition, if the optical fiber lines in the optical cable are unitized, each extra length can be stored in this extra length storage tool for each unit, making later maintenance work easier. can.

(Example) Examples of the present invention will be described in detail below with reference to FIGS. 1 and 2. As shown in the figure, the optical fiber surplus length storage device 8 of the present embodiment includes one rectangular first sheet 9 and a plurality of first sheets having the same apparent size as the first sheet 9. 2
The sheet 10 is formed as a main body. Connecting ears 11.12 are formed at both longitudinal ends of each sheet 9, 10, and each ear 11.12 has a hole 1.
1A and 12A are open. These sheets 9゜10
is made of, for example, a transparent polyester sheet whose surface is laminated with polyethylene.

These sheets 9 and 10 are stacked in the same direction, and there is an opening 1 between the long sides of each sheet 9 and 10 on one side in the width direction.
3, and between the long sides of each sheet 9 and 10 on the other side in the width direction, adjacent comrades heat each other! ! They are connected together to form a depth closing portion 14.

Both corners of the extra length storage device 8 at both longitudinal ends of the depth closing portion 14 are connected by connecting fittings 15 for reinforcement. Both longitudinal ends of each sheet 9.10 have ears 11,1
2 are removably connected to each other by hooks 16. A folded portion 17 that is folded back toward the side facing the first sheet 9 is provided on the long side portion of the sheet 10 of each IT 2 located at the opening 13 . A notch portion 17A is provided in the center of each folded portion 17, respectively.

Such an optical fiber surplus length storage tool 8 is placed on each second sheet 10 as shown in FIG. 3, with the hook 16 removed and the opening 13 side of each sheet 9, 10 turned over. The extra length 1A of the optical fiber core 1 etc. is stored in an oval loop shape, and its shape is maintained by closing the folded part 17 and the depth blocking part 14 as stoppers. The fiber connection part 6 provided in the middle of the extra length part 1Δ is also housed in one place. With all the extra length parts 1A stored, both ends are connected with hooks 16.

When the optical fiber core 1 of the optical cable 4 is made into a unit in units of a plurality of fibers, such an optical fiber surplus length storage device 8 stores the surplus length portion 1A of each unit. This is preferable because it makes management easier.

Further, this optical fiber surplus length storage tool 8 can also be used to store surplus lengths, such as optical fiber cords for outdoor wiring, for example.

(Effects of the Invention) As explained above, the optical fiber surplus length storage device according to the present invention has a rectangular shape in which the dimension in the width direction, that is, the depth direction is smaller than the length direction. The department can be slimmed down. In the case of such an optical fiber surplus length storage device, the surplus length of the optical fiber core etc. is stored in an oval shape, but in the case of this storage device, a closing part is provided at the back and a closed part is provided at the front. Since the folded portion of the second sheet is provided, the oval shape of the extra length portion can be easily maintained using these portions. In addition, since this extra length storage device is made of stacked flexible sheets, it remains thinner than a hard case even when multiple sheets are stacked on top of each other.
This is very suitable for slimming down the connection part. Furthermore, since the second sheet that stores the extra length has a folded part on its long side on the opening side, it is easy to store the extra length even though it is just a stack of sheets. This can be done reliably, and the extra length portions can be easily taken out independently for each extra length portion. Moreover, since this extra length storage device is formed of a sheet and has a simple shape, it has the advantage that it can be manufactured at a very low cost. Furthermore, when each optical fiber core wire of an optical cable is formed into a unit, the extra length can be stored in units, which has the advantage of making later management very easy.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a completed state of an optical fiber surplus storage device according to the present invention, FIG. 2 is a perspective view of an example of this surplus length storage device in an exploded state, and FIG. FIGS. 4 and 5 are perspective views of a conventional extra length storage device in a hard case and a soft case, respectively.

Claims (1)

[Claims] A rectangular and flexible first sheet and a plurality of rectangular and flexible second sheets are stacked in the same direction, and one of the sheets in the width direction An opening is formed between the long sides on the side of each sheet, and a depth closed portion is formed between the long sides on the other side in the width direction of each sheet, and adjacent sheets are connected to each other to form a depth closed portion. The short sides on both sides are connected at least partially in the width direction, and each of the second
An optical fiber surplus length storage device, characterized in that each of the long sides of the sheet located at the opening is provided with a folded portion that is folded back toward the side facing the first sheet.