JP2006001707A - Sleeve for bobbin and linear body handling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To very easily remove a linear body taken up on a bobbin. <P>SOLUTION: A cylindrical drum part 11 where an optical fiber as a linear body is taken up is provided with flanges 12 at both ends thereof, and a sleeve 13 is mounted on the drum part 11 of the bobbin 10 where one flange 12a is removably mounted on the drum part 11. The sleeve 13 includes: a projecting and recessed layer formed of a low-friction sheet 21 having a plurality of projections 21 on the surface of the drum part 11 side and a cushion layer formed of a PE sheet 22 and a PE sheet 23 and having a cushioning performance. With one flange 12a detached, the optical fiber is pulled out in the axial direction together with the sleeve 13 and removed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bobbin sleeve mounted on a bobbin for winding a linear body such as an optical fiber, and a linear body processing method.

In general, an optical fiber is wound around a bobbin formed of a synthetic resin such as plastic and stored or shipped in this state.
The bobbin has a cylindrical body and disk-shaped flanges provided at both ends of the body, and the optical fiber is wound around the body between the bobbin flanges.
By the way, the optical fiber at the beginning of winding around the bobbin body and the optical fiber wound around the bobbin body as a defective product are removed from the body and discarded.
For this reason, as shown in FIG. 7, one of the flanges 3 can be attached to and detached from the body 2 of the bobbin 1, and the optical fiber 5 is axially moved together with the sleeve 4 wound around the outer periphery of the body 2 as a cushioning material. A technique for drawing out is disclosed (for example, see Patent Document 1).

JP-A-6-183649

However, since the sleeve 4 is closely attached to the outer peripheral surface of the trunk portion 2 by the winding force of the optical fiber 5 wound on the outer peripheral side, a large gap is formed between the sleeve 4 and the trunk portion 2 when being pulled out in the axial direction. A frictional force is generated.
For this reason, in particular, when the amount of winding of the optical fiber 5 is large, the optical fiber 5 cannot be pulled out together with the sleeve 4, and the optical fiber 5 must be cut by a cutter.

  An object of the present invention is to provide a bobbin sleeve and a processing method for a linear body that can very easily remove the linear body wound around the bobbin.

  In order to achieve the above object, a bobbin sleeve according to the present invention is a bobbin sleeve mounted on a body part of a bobbin, and has a plurality of protrusions on an inner peripheral surface in contact with the body part. And

In addition, the inner peripheral surface in contact with the body portion preferably satisfies S2 / S1 ≧ 0.2, where S1 is an area of the protrusion and S2 is an area other than the protrusion.
Furthermore, it is desirable to be comprised from the uneven | corrugated layer provided with the said protrusion, and the cushion layer which has the cushioning property provided in the outer peripheral side of this uneven | corrugated layer.

Moreover, it is preferable to provide the shape holding member which hold | maintains a cylindrical shape in the outer peripheral side of a cushion layer.
Moreover, it is preferable that the shape holding member is provided integrally with the cushion layer.
Furthermore, a connecting member may be provided at both ends, and the connecting member may be connected at the time of mounting to form a cylindrical shape.

  Also, in the linear body processing method of the present invention, using the bobbin equipped with the bobbin sleeve, one flange of the bobbin is removed, and the linear body is wound around the sleeve and pulled out together with the sleeve. It is characterized by removing.

  According to the bobbin sleeve and the linear body processing method of the present invention, since the plurality of protrusions are provided on the inner peripheral surface of the sleeve that comes into contact with the bobbin body, the frictional resistance with the body can be reduced. The linear body wound around the bobbin can be removed together with the sleeve very easily.

The best mode for carrying out the present invention will be described below with reference to the drawings. In this embodiment, as an example of a linear body, an optical fiber in which the outer periphery of a glass fiber composed of a core and a clad is coated with a resin will be described as an example.
1 is a perspective view of a bobbin wound with an optical fiber, FIG. 2 is a cross-sectional view of a bobbin body wound with an optical fiber, and FIG. 3 is a cross-sectional view of a sleeve attached to the bobbin body. 4 is a plan view of the low friction sheet constituting the sleeve, and FIG. 5 is a perspective view for explaining a method of processing the optical fiber wound around the bobbin.

  As shown in FIG. 1, the bobbin 10 includes a cylindrical body 11 and disk-shaped flanges 12 provided at both ends of the body 11. The bobbin 10 is formed of, for example, a synthetic resin such as plastic, and one flange 12 a is detachable from the body 11.

  As shown in FIG. 2, the bobbin 10 is provided with a sleeve 13 on the outer periphery of the body 11, and an optical fiber 14 is wound around the body 11 via the sleeve 13. .

  As shown in FIG. 3, the sleeve 13 has an uneven layer made of a low friction sheet 21 such as an air patch and a cushioning property such as a PE sheet (polyethylene sheet) in order from the body 11 side. A two-layer structure in which the cushion layer 22 is laminated.

As shown in FIG. 4, the low friction sheet 21 constituting the concavo-convex layer has a plurality of protrusions 21 a filled with air on the surface on the body 11 side, and these protrusions 21 a are the outer periphery of the body 11. Contact the surface.
Here, in the plan view, the low friction sheet 21 has a relationship represented by the following expression, where S1 is an area of the protrusion 21a on the surface and S2 is an area other than the protrusion 21a.

  S2 / S1 ≧ 0.2

  That is, the area S1 of the protrusion 21a is about 83% or less of the entire area of the low friction sheet 21.

  When the optical fiber 14 is removed from the body 11 to be discarded by the bobbin 10 having the sleeve 13, the one flange 12a is removed from the body 11 as shown in FIG. Then, the optical fiber 14 together with the sleeve 13 is pulled in the axial direction.

Here, since the inner peripheral side of the sleeve 13 is an uneven layer made of the low friction sheet 21 having a plurality of protrusions 21a, friction between the sleeve 13 and the outer peripheral surface of the body portion 11 is suppressed as much as possible.
As a result, the sleeve 13 around which the optical fiber 14 is wound is easily slid in the axial direction with respect to the body 11 of the bobbin 10. Therefore, the optical fiber 14 is pulled out of the body 11 together with the sleeve 13.

  As described above, according to the bobbin sleeve and the linear body processing method according to the above-described embodiment, the plurality of protrusions 21 a are provided on the inner peripheral surface of the sleeve 13 that contacts the body 11 of the bobbin 10. 11 can be reduced, and the optical fiber 14 wound around the bobbin 10 can be removed together with the sleeve 13 very easily.

  In particular, the inner peripheral surface of the sleeve 13 is S2 / S1 ≧ 0.2 when the area of the protrusion 21a is S1 and the area other than the protrusion 21a is S2, so that the frictional resistance with the body 11 is ensured. Can be reduced.

As shown in FIG. 6, the sleeve 13 may be integrally provided with a shape holding member 31 made of a sheet such as a guard tape on the outer peripheral side of the cushion layer. When the sleeve 13 is attached to the body portion 11, buckling of the sleeve 13 is prevented, and the sleeve 13 can be smoothly attached to the body portion 11.
Further, when the wound optical fiber is removed from the bobbin 10, the sleeve 13 is deformed and removed from the bobbin 10, so that the shape can be maintained as described above, and a deformable material is desirable.

The sleeve 13 may be formed in a cylindrical shape in advance, but a sheet-like one may be curved into a cylindrical shape, or may be wound directly around the body 11 of the bobbin 10 and both ends may be connected by an adhesive or the like. As a result, smooth attachment to the body 11 is possible.
In the above embodiment, the optical fiber 14 has been described as an example of a linear body wound around the body 11 of the bobbin 10, but the linear body wound around the body 11 of the bobbin 10 is not limited to the optical fiber 14. Of course.

  The optical fiber was wound around the bobbin having the sleeve according to the above embodiment and the bobbin having the conventional structure sleeve (see FIG. 6) with different winding amounts, and whether or not the optical fiber sleeve was removable was examined. The winding amount of the optical fiber was 5 km, 10 km, 100 km, and 200 km. The results are shown in Table 1.

  As shown in Table 1, in the case of a bobbin equipped with a sleeve having a conventional structure, it could be removed with a winding amount of 5 km, but with a winding amount of 10 km, 100 km, and 200 km, the sleeve and The frictional resistance with the bobbin trunk increased, and could not be removed.

  On the other hand, in the case of the bobbin provided with the sleeve according to the embodiment, the frictional resistance with the body of the bobbin is reduced by the low friction sheet having a plurality of protrusions, thereby reducing the friction of 5 km, 10 km, 100 km, and 200 km. It was possible to remove at all winding amounts.

It is a perspective view of the bobbin by which the optical fiber was wound up. It is sectional drawing in the trunk | drum of the bobbin by which the optical fiber was wound up. It is sectional drawing of the sleeve attached to the trunk | drum of a bobbin. It is a top view of the low friction sheet | seat which comprises a sleeve. It is a perspective view explaining the processing method of the optical fiber wound up by the bobbin. It is sectional drawing of the sleeve explaining the other structure of the sleeve attached to the trunk | drum of a bobbin. It is sectional drawing of the sleeve attached to the trunk | drum of the bobbin which shows the structure of the conventional sleeve for bobbins.

Explanation of symbols

10 Bobbin 11 Body 12, 12a Flange 13 Sleeve 14 Optical fiber (linear body)
21a Protrusion 31 Shape retaining member

Claims (7)

A bobbin sleeve to be mounted on the body of the bobbin,
A bobbin sleeve comprising a plurality of protrusions on an inner peripheral surface that comes into contact with the body portion.   2. The bobbin according to claim 1, wherein the inner peripheral surface in contact with the body portion satisfies S 2 / S 1 ≧ 0.2, where S 1 is an area of the protrusion and S 2 is an area other than the protrusion. sleeve.   3. The bobbin sleeve according to claim 1, wherein the bobbin sleeve includes an uneven layer including the protrusions and a cushion layer having cushioning properties provided on an outer peripheral side of the uneven layer.   The bobbin sleeve according to claim 1, further comprising a shape holding member that holds a cylindrical shape on an outer peripheral side of the cushion layer.   The bobbin sleeve according to claim 4, wherein the shape retaining member is provided integrally with the cushion layer.   The bobbin sleeve according to any one of claims 1 to 5, wherein a connecting member is provided at both ends, and the connecting member is connected at the time of mounting to form a cylindrical shape. Using the bobbin on which the bobbin sleeve according to any one of claims 1 to 6 is mounted, remove one flange of the bobbin, and pull out the linear body together with the sleeve while being wound around the sleeve. A method for treating a linear body, comprising removing the linear body.

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