JPS6147905A - Optical fiber surplus length containing tool - Google Patents

Abstract

PURPOSE:To make a depth size small by superposing plural rectangular and flexible sheets, by forming one side of the part between long side parts as a choking part connected by different depth sizes, and forming the other side by providing a folding part on an opening part. CONSTITUTION:One sheet of the first rectangular sheet 9 and plural sheets of the second sheet 10 of the same size are superposed, and one of the parts between long side parts is connected by making the positions different so that depth sizes of a depth choking part 14 between adjacent layers are made different. Also, both corner parts are connected by metallic fittings 15 for the purpose of reinforcement. As for the other, a folding part 17 is provided at the side facing the sheet 9 on an opening part 13 of each second sheet 10. In that state, a surplus length part 1A of a core wire 1, etc. is contained in a long circular loop shape on each second sheet 10, and its shape is held by using the folding part 17 and the choking part 14 as stoppers. Accordingly, since the choking part 14 is provided so that the depth sizes become different, each fiber connecting part 6 is not superposed to each other and can be contained. Also, in case the core wire 1 is formed to a unit by setting plural pieces to one unit, when the surplus length part 1A is contained per unit, the subsequent management can be executed easily.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is an optical fiber that is suitable for use when storing the excess length of optical fiber cores or optical fiber cords, for example, at the drop-in connection part of optical cables. This invention relates to a fiber extra length storage device.

(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 the JJ s diagram, 4 is the optical cable, 5 is the connection part that houses the case 2, 3, etc., 6 is the fiber connection part, and 7 is the seam fusion part that connects the three sides of the soft case 3. .

(The problem that the invention is trying to solve) However,
Conventionally, the surplus portion 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, and therefore each case 2. 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 case of the hard case 2, when the plurality of extra length parts 1A are housed in the individual hard cases 2 and these hard cases 2 are subjected to mFH, the laminated thickness of each part of the hard case 2 is the same as the thickness of each of the hard cases 2. As the number of connecting boxes 5 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.

On the other hand, when a plurality of soft cases 2 are stacked, each fiber connection part 6 tends to overlap at the same position, so there is a drawback that the thickness of that part becomes abnormally large.

An object of the present invention is to reduce the depth dimension,
Even if you stack them! 11 layer thickness can be minimized,
Further, it is an object of the present invention to provide an optical fiber surplus length storage device that can suppress overlapping of fiber connecting portions at the same position.

(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 1- are stacked in the same direction, an opening is formed between the long sides of one side in the width direction of each sheet, and the length of the other side of each sheet in the width direction is an opening. Adjacent comrades between the side parts are mutually connected to form a depth closure part, and each depth closure part between adjacent layers is provided at different positions in the depth direction so that the depth dimension from the opening part is different, The short sides on both sides in the length direction of each of the sheets are connected at least partially in the width direction, and the long sides located at the openings of each of the second sheets have a surface that faces the first sheet. It is characterized in that it is folded back on the side where it is folded, and a folded part is provided on each side.

(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 loop-shaped extra length is pressed by the folded part of the second sheet on the opening side of the extra length storage device, and is pressed by the depth connecting part on the depth side, so that the extra length becomes an ellipse. The shape is maintained and 1112 appearance is prevented. Furthermore, since the depth between adjacent layers is such that the closing portions are provided with different depth dimensions from the opening portion, each phi.

Since the fiber connecting portions are housed at different positions in the historical direction, it is possible to minimize the possibility that the fiber connecting portions overlap each other at the same position. When taking out each extra length part, it can be easily taken out by folding the folded part of the second sheet in the opposite folding direction. Since this extra length storage tool has a small depth dimension, the radial dimension of the connecting surface can be reduced, and the connecting surface can be made slimmer. In addition, if the optical fiber cores 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 be done.

(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 this embodiment includes one rectangular first sheet 9 and a plurality of first sheets 9 of the same size as the first sheet 9. It is mainly formed of seas 1-10 of 2. Connecting ears 11 are provided at both longitudinal ends of each sheet 9.10.
12 are formed respectively, and holes 11A and 12A are formed in each ear portion 11 and 12, respectively. These sheets 9
10 is formed 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 the long sides of each sheet 9 and 10 on the other side in the width direction are mutually heated! are connected to each other to form a central blocking section 14.

The depth closing portions 1/I between adjacent layers are installed at different positions in the depth direction so that the depth dimensions from the opening 13 are different. Both corners of the extra length storage device 8 at both lengthwise ends of the depth closing portion 14 are connected by connecting fittings 15 for reinforcement. Both longitudinal ends of each sear 1 9, 10 are removably connected to each other by hooks 16 with ears 11, 12. Frontage portion 13 of each second sheet 10
A folded portion 17 that is folded back toward the side facing the first sheet 9 is provided on the long side portion located at each side. 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 part 1A of the optical fiber core 1 etc. is stored in an oval loop shape, and its shape is maintained using the folded part 17 and the depth blocking part 14 as stoppers. Each fiber connection 6
Also store them together. In this case, as described above, each depth closing part 14 is provided with different dimensions in the depth direction between adjacent layers, so it is possible to store each fiber connecting part 6 while avoiding overlapping. This makes it possible to prevent the storage location of the fiber connecting portion 6 from becoming abnormally SX<. With all the extra length parts 1A stored, both ends are connected with hooks 16.

Such an optical fiber surplus length storage tool 8 is used to store the optical fiber of the optical cable 4. When the fiber cores la1 are unitized into a plurality of units, it is preferable to store the extra length portion 1A of each unit in units, as this facilitates later management.

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 extra 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 connecting part can be made slimmer. 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 flexible sheets stacked together, it is 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 accommodates the extra length has a folded part on its long side on the opening side, it is possible to
Even though it is a laminate, the extra length can be reliably stored, and each extra length can be easily taken out independently. In particular, in the present invention, since each depth closing part is provided with a different depth dimension from the opening part between adjacent layers, it is possible to store the fiber connections while avoiding them so that they do not overlap. It is possible to suppress abnormal swelling of the storage area of the fiber connection part as much as possible.

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 a completed state of an example of an optical fiber surplus storage device according to the present invention, FIG. 2 is a perspective view of this surplus length storage device in an exploded state, and FIG. 3 is a perspective view of this surplus length storage device. FIGS. 4 and 5 are perspective views of a conventional surplus 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 The long sides on the other side in the width direction of each sheet are connected to each other to form a depth closed part, and each depth between adjacent layers is defined as an opening. The closing portions are provided at different positions in the depth direction so that the depth dimensions from the opening portion are different, and the short sides on both sides in the length direction of each sheet are connected at least partially in the width direction,
An optical fiber surplus length storage device, characterized in that each of the second sheets has a folded portion folded back toward the side facing the first sheet on a long side portion located at the opening portion of each of the second sheets. .