JP5767128B2 - Resin removal method and resin removal tool - Google Patents

Description

  The present invention relates to a resin removal method and a resin removal tool for removing resin remaining on the outer periphery of a single-core coated optical fiber.

  As an optical fiber core wire mounted on an optical cable, an optical fiber tape is used in which a plurality of single-core coated optical fibers are arranged in a plane and integrated by applying resin to the outer periphery thereof. (For example, refer to Patent Document 1). Since such an optical fiber tape can connect a plurality of single-core coated optical fibers at the same time when connecting multi-fiber optical cables, the connection work can be performed efficiently.

  In some cases, single-fiber separation is performed to separate this optical fiber tape into one single-core coated optical fiber, and connection is made with an optical fiber core wire for wiring to each user. As a connection component used at this time, there is an on-site assembly type connector (see, for example, Patent Document 2). In this field assembly type connector, an optical fiber is built in a ferrule in advance. The end of the optical fiber on the ferrule tip side is polished in advance. The end of the optical fiber built in the ferrule inside is mirror-cut, and a refractive index matching agent is applied to the end face.

  With such a structure, a mirror-cut optical fiber is inserted from behind the ferrule and abutted against the end face of the built-in optical fiber, whereby a connector that can be connected with low loss can be easily manufactured.

  A tool for removing the coating of a single-core coated optical fiber has been proposed (see, for example, Patent Document 3). In this tool, a single-core coated optical fiber is peeled off by sandwiching the separated single-core coated optical fiber and applying a side pressure.

  On the other hand, a high-density optical cable using an optical fiber tape having a different form from the conventional one has been proposed (for example, see Patent Document 4). This optical fiber tape has a structure in which a resin for integrating single-core coated optical fibers is partially arranged. Since it is necessary to integrate the single-core coated optical fibers with partially disposed resin, the optical fiber tape is manufactured by increasing the adhesion between the resin and the single-core coated optical fiber.

No. 04-058004 Patent 3515677 Patent 3795448 Japanese Patent No. 4619424

  Here, if a single-core coated optical fiber subjected to single-core separation is used as it is, the resin used for integrating the single-core coated optical fibers remains on the outer periphery of the single-core coated optical fiber. There is. When the resin remains, the resin is caught by the optical fiber insertion portion of the on-site assembly type connector, and the mirror-cut optical fiber cannot be matched with the built-in optical fiber.

  When removing the resin remaining on the outer periphery of the single-core coated optical fiber, it cannot be removed by a conventional resin removal tool because of the high adhesion of the resin. In addition, commercially available sandpaper or the like is effective for removing the residual resin, but there is a risk of breaking the optical fiber during the removal operation.

  On the other hand, when the removal operation is performed using a flexible material such as a nonwoven fabric that does not possibly damage the optical fiber, the surface of the remaining resin is boiled, and the effect of removing the remaining resin cannot be obtained. In addition, when the removal operation is performed using a flexible material such as rubber, the resin remaining due to friction may be peeled and removed, but the coating of the single-core coated optical fiber is softened by frictional heat, and may be deformed or lightened. There is a risk of damaging the exposed fiber.

  For the above reasons, when single-core separation is performed on an optical fiber tape in which a resin for partially integrating single-core coated optical fibers is separated, conventional resin removal technology uses the single-core coated optical fiber after separation. There is a problem that it cannot be applied to the removal of the resin remaining on the outer periphery.

  In order to solve the above problems, the present invention provides a resin removal method and a resin removal tool capable of easily removing resin remaining on the outer periphery of a single-core coated optical fiber without damaging the fiber. For the purpose.

  In order to achieve the above object, the resin removal method of the present invention is a resin removal sheet having fibers formed on a sheet surface and fine particles disposed between the fibers, and sandwiching a single-core coated optical fiber from the radial direction. The resin remaining on the outer periphery of the single-core coated optical fiber was removed by squeezing it.

Specifically, the present invention is a resin removal sheet having fibers formed on a sheet surface and fine particles disposed between the fibers, and the single-core coated light is sandwiched between the single-core-coated optical fibers from the radial direction. By removing the resin remaining on the outer periphery of the single-core coated optical fiber by rubbing in the longitudinal direction of the fiber, the particle diameter of the fine particles is equal to or less than the thickness of the coating of the single-core coated optical fiber. is there.

  According to the present invention, it is possible to easily remove the resin remaining on the outer periphery of the single-core coated optical fiber without damaging the optical fiber.

  The resin removal method of the present invention is characterized in that the fibers are formed in a raised shape on the sheet surface.

  According to the present invention, it is possible to easily remove the resin remaining on the outer periphery of the single-core coated optical fiber without damaging the optical fiber.

  According to the present invention, it is possible to easily remove the resin remaining on the outer periphery of the single-core coated optical fiber without damaging the optical fiber.

  In the resin removal method of the present invention, the fine particles may be disposed between the fibers on the side close to the sheet surface.

  According to the present invention, it is possible to easily remove the resin remaining on the outer periphery of the single-core coated optical fiber without further damaging the optical fiber.

  In the resin removal method of the present invention, the fine particles may be fixed to the fibers.

  According to the present invention, it is possible to easily remove the resin remaining on the outer periphery of the single-core coated optical fiber without damaging the optical fiber. Moreover, it becomes possible to use a resin removal sheet repeatedly.

  In order to achieve the above object, a resin removal tool of the present invention includes a resin removal sheet having fibers formed on a sheet surface and fine particles disposed between the fibers, and a grip portion for gripping by hand. It was.

Specifically, the present invention is a resin removal tool for removing resin remaining on the outer periphery of a single-core coated optical fiber, the fiber formed on the sheet surface and the particle diameter disposed between the fibers Included There sandwiched the resin removing sheet having a fine particle is less than the thickness of the coating of the single-core coated optical fiber, the single-core coated optical fiber from the radial direction in the resin removed sheets respectively attached to a mounting surface two opposite And a gripping part for gripping by hand so as to squeeze in the longitudinal direction of the single-core coated optical fiber.

  According to the present invention, it is possible to easily remove the resin remaining on the outer periphery of the single-core coated optical fiber without damaging the optical fiber.

  The resin removal tool of the present invention is characterized in that the fibers are formed in a raised shape on the sheet surface.

  According to the present invention, it is possible to easily remove the resin remaining on the outer periphery of the single-core coated optical fiber without damaging the optical fiber.

  According to the present invention, it is possible to easily remove the resin remaining on the outer periphery of the single-core coated optical fiber without further damaging the optical fiber.

In the resin removal tool of the present invention, the length of the single-core coated optical fiber to be sandwiched by the resin removal sheet is L (mm), the number of single-core coated optical fibers to be sandwiched is M (number), and the single-core coated optical fiber is sandwiched. When the force is F (N), the gripping is performed so that the side pressure P applied to the single-core coated optical fiber represented by P = F / (L × M ) is 30 (N / mm · line) or less. It further comprises an elastic layer disposed between the mounting surface of the part and the sheet surface of the resin removal sheet.

  According to the present invention, it is possible to avoid deformation of a single-core coated optical fiber.

The resin removal tool of the present invention is
The length of the single-core coated optical fiber that is sandwiched by the resin removal sheet is L (mm), the number of single-core coated optical fibers that are sandwiched is M (number), and the force that sandwiches the single-core coated optical fiber is F (N). A spring that exerts a clamping force on the grip portion so that a side pressure P applied to the single-core coated optical fiber represented by P = F / (L × M ) is 30 (N / mm · number) or less. Is further provided.

  According to the present invention, it is possible to avoid deformation of a single-core coated optical fiber.

In the resin removal tool of the present invention, the center portion of the mounting surface of the gripping portion is planar , and at least the edge of the mounting surface of the gripping portion of the mounting surface in the longitudinal direction of the single-core coated optical fiber to be sandwiched The edge is a convex curved surface.

  According to the present invention, since the single-core coated optical fiber is not sharply bent at the edge of the resin removal sheet even when the single-core coated optical fiber is squeezed while pressing is applied, the optical fiber Breaking can be avoided.

The resin removal tool of the present invention is
The mounting surface of the grip portion is Ri semicylindrical der, longitudinal section of the single-core coated optical fiber sandwich is characterized semicircular der Rukoto.

  According to the present invention, since the single-core coated optical fiber is not sharply bent at the edge of the resin removal sheet even when the single-core coated optical fiber is squeezed while pressing is applied, the optical fiber In addition to avoiding breakage, since the pressing force concentrates on the ridgeline of the semi-cylinder when the single-core coated optical fiber is sandwiched, the force for sandwiching the single-core coated optical fiber increases, so the side pressure applied to the gripping part from the outside is increased. Work is easy even in small cases.

  In the resin removal tool of the present invention, the fine particles may be disposed between the fibers on the side close to the sheet surface.

  According to the present invention, it is possible to easily remove the resin remaining on the outer periphery of the single-core coated optical fiber without further damaging the optical fiber.

  In the resin removal tool of the present invention, the fine particles may be fixed to the fibers.

  According to the present invention, it is possible to easily remove the resin remaining on the outer periphery of the single-core coated optical fiber without damaging the optical fiber. Further, it can be used repeatedly.

  The above inventions can be combined as much as possible.

  According to the present invention, it is possible to easily remove the resin remaining on the outer periphery of the single-core coated optical fiber without damaging the optical fiber.

It is a figure explaining the 1st structural example of the resin removal sheet used with the resin removal method of this invention. It is a schematic diagram at the time of removing the resin remaining on the outer periphery of the single-core coated optical fiber. It is a schematic diagram at the time of removing the resin remaining on the outer periphery of the single-core coated optical fiber. It is a figure explaining the relationship between the microparticles | fine-particles of a resin removal sheet, and the coating thickness of a single core coating | coated optical fiber. It is a figure explaining the structure of a single core covering optical fiber. It is a figure explaining the 2nd structural example of the resin removal sheet used with the resin removal method of this invention. It is a schematic diagram at the time of removing the resin remaining on the outer periphery of the single-core coated optical fiber. It is a figure explaining the modification of the 1st structural example of a resin removal sheet. It is a figure explaining the modification of the 2nd structural example of a resin removal sheet. It is a schematic diagram at the time of removing the resin remaining on the outer periphery of the single-core coated optical fiber. It is a figure explaining the 3rd structural example of a resin removal sheet. It is the schematic of a resin removal tool. It is a figure explaining the usage example of a resin removal tool. It is the schematic of a resin removal tool. It is a figure explaining the example of an experiment of a resin removal tool. It is a figure explaining the result of having confirmed the presence or absence of the deformation | transformation of the cross-sectional shape of a single core coating | coated optical fiber. It is a figure explaining the resin removal tool. It is a figure explaining the usage example of a resin removal tool. It is a figure explaining the resin removal tool. It is a figure explaining the resin removal tool.

  Embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below are examples of the present invention, and the present invention is not limited to the following embodiments. In the present specification and drawings, the same reference numerals denote the same components. Each embodiment can be combined as much as possible.

(Embodiment 1)
The resin removal method of the present invention is a resin removal sheet having fibers formed on a sheet surface and fine particles disposed between the fibers, and the single-core coated optical fiber while sandwiching the single-core coated optical fiber from the radial direction. The resin remaining on the outer periphery of the single-core coated optical fiber is removed by squeezing in the longitudinal direction.

  The 1st structural example of the resin removal sheet used with the resin removal method of this invention is shown in FIG. In FIG. 1, 120 is a resin removal sheet, 121 is fine particles, 122 is a fiber, and 123 is a substrate. The resin removal sheet has fibers 122 formed on the sheet surface of the substrate 123 and fine particles 121 disposed between the fibers 122. The substrate 123 is obtained by processing a resin or paper into a sheet shape. As the fibers 122, for example, as shown in FIG. The fine particles 121 are dispersed in the gaps between the fibers 122.

  Schematic diagrams when the resin remaining on the outer periphery of the single-core coated optical fiber is removed by the resin removal sheet 120 are shown in FIGS. 2, 3 (A), and 3 (B). FIG. 2 is a model in the case where minute irregularities and burrs are present on the surface of the remaining resin, and FIGS. 3A and 3B are cases in which the surface of the remaining resin is smooth. It is a model. 2, 3 </ b> A, and 3 </ b> B, 111 is a residual resin (referred to as “residual resin” in the drawings; the same applies hereinafter) 112 is a single-core coated optical fiber, and 120 is a resin removal sheet. It is.

  In FIG. 2, when the single-core coated optical fiber 112 is sandwiched by the resin removal sheet 120 and squeezed in the longitudinal direction, the resin removal sheet 120 is entangled when the fibers of the resin removal sheet 120 are caught on the edge of the remaining resin 111. Since the remaining resin 111 is peeled off, the remaining resin can be easily removed.

  The initial state of the remaining resin 111 is an example in which the surface is in a smooth state as shown in FIG. Since the fibers of the resin removal sheet 120 do not get caught by the remaining resin 111 because it is smooth, it is difficult to remove the remaining resin 111. However, the outer periphery of the single-core coated optical fiber 112 is rubbed in the longitudinal direction with the resin removal sheet 120. 3 serves to grind the surface of the resin 111 in which fine particles present in the gaps of the fibers of the resin removal sheet 120 remain, and as shown in FIG. 3B, minute irregularities are formed on the surface of the resin 111 remaining after grinding. And burr will be formed. Thereafter, as in FIG. 2, the fibers of the resin removal sheet 120 are caught on the edge of the remaining resin 111, so that the remaining resin 111 can be easily removed.

  FIG. 4 shows the relationship between the fine particles of the resin removal sheet and the coating thickness of the single-core coated optical fiber, and FIG. 5 shows the structure of the single-core coated optical fiber. 4 and 5, 110 is an optical fiber, 112 is a single-core coated optical fiber, 113 is a coating, and 121 is a fine particle of a resin removal sheet.

  As shown in FIG. 4, since the particle 121 does not reach the depth of the coating 113 by setting the particle size of the particle 121 to be equal to or smaller than the thickness of the coating 113 of the single-core coated optical fiber 112, the optical fiber is disconnected. It is possible to avoid such damage. Here, the thickness of the coating 113 applied to the outer periphery of the optical fiber 110 is as shown in FIG. In the case of a single-core coated optical fiber having an outer diameter of 0.25 mm that is widely used, the thickness of the coating is about 62.5 μm. Therefore, damage to the optical fiber 110 can be avoided by setting the maximum particle size of the fine particles 121 to 62.5 μm or less.

  The smaller the particle size of the fine particles 121 is, the smaller the risk of damaging the optical fiber 110 is. However, if the particle size is too small, it becomes difficult to form unevenness on the residual resin to be removed. By doing so, removability can be improved.

  As described above, if the single-core coated optical fiber is sandwiched between the resin-removable sheets of the present embodiment and the single-core coated optical fiber is placed in the longitudinal direction, the single-coated optical fiber is not damaged. Resin remaining on the outer periphery can be easily removed.

   The residual resin removal performance can be changed by changing the dimensions such as the fiber thickness and the outer diameter of the fine particles, or the Young's modulus, hardness, friction coefficient, and surface shape of the fibers and fine particles. Therefore, not only the optical fiber tape as in Patent Document 1, but also a conventional optical fiber tape resin or a single-core coated light having an outer diameter of 0.5 mm that is further coated concentrically on the outer periphery of the single-core coated optical fiber. In order to remove the outermost layer coating such as fiber, it is possible to appropriately change the material and shape of the fiber material and fine particles. The same applies to the following embodiments.

(Embodiment 2)
The 2nd structural example of the resin removal sheet used with the resin removal method of this invention is shown in FIG. In FIG. 6, 120 is a resin removal sheet, 121 is fine particles, 122 is a fiber, and 123 is a substrate. The resin removal sheet has fibers 122 formed in a raised shape on the sheet surface of the base material 123 and fine particles 121 disposed between the fibers 122. The substrate 123 is obtained by processing a resin or paper into a sheet shape. The fiber 122 is formed in a raised shape by joining one end of the fiber to the sheet surface of the substrate 123. The fine particles 121 are dispersed in the gaps between the fibers 122.

  FIG. 7 shows a schematic diagram when the resin remaining on the outer periphery of the single-core coated optical fiber is removed by the resin removal sheet 120. In FIG. 7, 111 is the remaining resin, 112 is a single-core coated optical fiber, and 120 is a resin removal sheet.

  In FIG. 7, the single-core coated optical fiber 112 is sandwiched between the resin removal sheets 120 and rugged in the longitudinal direction. When the fiber of the resin removal sheet 120 is caught on the edge of the residual resin 111, the residual resin 111 can be easily removed in order to peel off the residual resin 111 so that the resin removal sheet 120 gets entangled. is there. The function of the fine particles of the resin removal sheet 120 is the same as that of the first embodiment.

  As described above, if the single-core coated optical fiber is sandwiched between the resin-removable sheets of the present embodiment and the single-core coated optical fiber is placed in the longitudinal direction, the single-coated optical fiber is not damaged. Resin remaining on the outer periphery can be easily removed.

(Modification of Embodiments 1 and 2)
A modification of the first structure example of the resin removal sheet used in the resin removal method of the present invention is shown in FIG. 8, and a modification of the second structure example is shown in FIG. 8 and 9, 120 is a resin removal sheet, 121 is fine particles, 122 is a fiber, and 123 is a base material. In any case, the fine particles 121 are disposed between the fibers 122 on the side of the resin removal sheet 120 near the base material 123. The fine particles 121 may be disposed between the fibers 122 so as to contact the base material 123.

  FIG. 10 shows a schematic diagram when the resin remaining on the outer periphery of the optical fiber is removed by the resin removal sheet 120 shown in FIG. In FIG. 10, 111 is the remaining resin, 112 is a single-core coated optical fiber, and 120 is a resin removal sheet.

  As shown in FIG. 10, when the single-core coated optical fiber 112 is sandwiched, the fibers and fine particles come into contact with the remaining resin 111. However, since only the fibers are in contact with the surface of the single-core coated optical fiber 112 and the fine particles are difficult to contact, the possibility that the optical fiber 110 is damaged by the contact of the fine particles can be reduced. Even if the fine particles come into contact with the single-core coated optical fiber 112, if the particle diameter of the fine particles is equal to or less than the thickness of the coating of the single-core coated optical fiber 112, the possibility of damage to the optical fiber 110 may be sufficiently reduced. it can.

  In the present embodiment, the method for removing the resin remaining on the outer periphery of the single-core coated optical fiber with the resin removal sheet 120 shown in FIG. 8 has been described, but the same applies to the resin removal sheet 120 shown in FIG. .

  As described above, the outer periphery of the single-core coated optical fiber is not damaged when the single-core coated optical fiber is sandwiched between the resin-removed sheets of the present embodiment and the single-coated coated optical fiber is damaged in the longitudinal direction. It becomes possible to easily remove the resin remaining in the substrate.

(Embodiment 3)
FIG. 11 shows a third structure example of the resin removal sheet used in the resin removal method of the present invention. In FIG. 11, 120 is a resin removal sheet, 121 is fine particles, 122 is a fiber, 123 is a base material, and 124 is an adhesive.

  In FIG. 11, the fine particles 121 are fixed to the fibers 122 of the resin removal sheet 120. By fixing the fine particles to the fiber material with an adhesive or the like, the fine particles do not fall off, so that a resin removal sheet having excellent durability that can be used repeatedly can be obtained. However, this adhesive is applied for the purpose of fixing fine particles to the fiber, and is not limited to the means using the adhesive. For example, the adhesive may be fixed by static electricity or vapor deposition, and the fiber You may mix and shape | mold in.

  The resin removal sheet of FIG. 11 is obtained by fixing fine particles to the fibers 122 of the second structure example of the resin removal sheet shown in FIG. 6, but the fibers 122 of the first structure example of the resin removal sheet shown in FIG. 1. Fine particles may be fixed to the surface.

  As described above, if the single-core coated optical fiber is sandwiched between the resin-removable sheets of the present embodiment and the single-core coated optical fiber is placed in the longitudinal direction, the single-coated optical fiber is not damaged. The resin remaining on the outer periphery can be easily removed, and the resin removal sheet can be used repeatedly.

(Embodiment 4)
Schematic diagrams of a resin removal tool according to the present invention are shown in FIGS. 12 (A) and 12 (B). FIG. 12A is a side view of the resin removal tool, and FIG. 12B is a cross-sectional view taken along the plane AA in FIG. In FIG. 12, 10 is a resin removal tool, 11 is a gripping part, 120 is a resin removal sheet, and 13 is a pedestal part. The resin removal tool for removing the resin remaining on the outer periphery of the single-core coated optical fiber includes any one of the resin removal sheets 120 described in the above-described embodiment and a resin removal sheet attached to each of two opposing attachment surfaces. And a gripping part for gripping by hand so that the single-core coated optical fiber can be sandwiched from the radial direction.

  12 (A) and 12 (B), two gripping portions 11 having one end fixed to the pedestal portion 13 are provided, and a resin removal sheet 120 is provided on each of two mounting surfaces facing each other at the other end of the gripping portion 11. It has a structure. In FIG. 12A, the grip portion 11 has two grip portions 11 joined to a pedestal portion 13. The gripping part 11 may be U-shaped or V-shaped, and the two gripping parts may be coupled without a pedestal part.

  An example of use of the resin removal tool is shown in FIG. In FIG. 13, 10 is a resin removal tool, 11 is a gripping part, 120 is a resin removal sheet, 13 is a pedestal part, 112 is a single-core coated optical fiber, and 111 is a residual resin. As shown in FIG. 13, the single-core coated optical fiber 112 is sandwiched between the resin removal sheets 120, and the longitudinal direction of the single-core coated optical fiber 112 is applied to the two gripping portions 11 from the outside (pressing direction in FIG. 13). The operation is performed in the relative movement direction of FIG.

  At this time, the single-core coated optical fiber 112 may be moved in the longitudinal direction of the single-core coated optical fiber 112, or the resin removal tool 10 may be moved in the longitudinal direction of the single-core coated optical fiber 112.

  With the resin removal tool having such a structure, it is possible to easily remove the resin remaining on the outer periphery of the single-core coated optical fiber without damaging the optical fiber.

  About a holding part, it is the structure used for an ironing operation | work for a single core coating | coated optical fiber. Therefore, the shape of the gripping portion can be simplified while ensuring workability. For example, let the back surface of the resin removal sheet be a gripping part. It may be configured to be directly gripped. Thereby, the cost of the tool can be reduced. Or in order to improve workability | operativity, it is also possible to change into the shape which is easy to hold | grip with an operator's hand, and can apply the force which pinches | interposes a single core coated optical fiber more. The same applies to the following embodiments.

(Embodiment 5)
A schematic view of a resin removal tool according to the present invention is shown in FIG. In FIG. 14, 10 is a resin removal tool, 11 is a gripping part, 120 is a resin removal sheet, 13 is a pedestal part, and 14 is an elastic layer.

  When sandwiching the single-core coated optical fiber with the resin removal tool 10, if the sandwich is applied with an excessive force, the coating of the single-core coated optical fiber may be deformed by the pressing force. In order to avoid the deformation, as shown in FIG. 14, the elastic layer 14 is disposed between the resin removal sheet 12 and the gripping part 11 to relieve excessive pressing force and prevent deformation of the coating. It becomes possible. By adopting such a structure, it becomes possible to sandwich the single-core coated optical fiber with a constant pressing force regardless of the variation in the force of the operator who uses the resin removal tool 10. It is possible to avoid deformation of the coating. Examples of the material of the elastic layer 14 include rubber and sponge.

  Therefore, an experiment as shown in FIG. 15A is performed, and it is confirmed whether or not the single-core coated optical fiber is deformed when a side pressure assuming a pressing force is applied from the side surface of one single-core coated optical fiber. did. In FIG. 15A, 112 is a single-core coated optical fiber, 41 is a flat plate, and 42 is a load meter. The upper and lower sides of the single-core coated optical fiber 112 were sandwiched between flat plates 41, and a load was applied from the upper flat plate 41 toward the load meter 42.

Fig. 4 shows the result of confirming whether or not the cross-sectional shape of one single-core coated optical fiber has changed by conducting an experiment in which a side pressure assuming a pressing force is applied from the side of one single-core coated optical fiber having an outer diameter of 0.25 mm. 15 (B). As a result, it was confirmed that there was no deformation when the pressing force was 30 (N / mm · book) or less. When this is generalized, the length of the single-core coated optical fiber to be sandwiched by the resin removal sheet is L (mm), the number of single-core coated optical fibers to be sandwiched is M (number), and the force to sandwich the single-core coated optical fiber is F. When (N: Newton), the side pressure P applied to the single-core coated optical fiber represented by P = F / (L × M ) is 30 (N / mm · line) or less.

  Although the resin removal tool 10 shown in FIG. 14 is provided with the elastic layer 14 on both of the gripping portions 11, the elastic layer 14 may be provided only on one side of the gripping portion 11.

  Further, a resin removing tool as shown in FIG. 16 may be used. In FIG. 16, 10 is a resin removal tool, 11 is a gripping part, 120 is a resin removal sheet, 13 is a pedestal part, and 15 is a spring. You may control the force which pinches | interposes a single core coating | coated optical fiber using the contraction force of the spring 15 which makes the holding | grip part 11 exhibit pinching force. In this case, there is no change in the cross-sectional shape of the single-core coated optical fiber as long as the pressing force is 30 (N / mm · line) or less using the contraction force of the spring.

  As described above, in the case of the resin removal tool of the present embodiment, the elastic layer 14 or the spring 15 is provided, and the pressing force applied to the single-core coated optical fiber is 30 (N / mm · line) or less. This makes it possible to avoid deformation of the single-core coated optical fiber.

(Embodiment 6)
FIGS. 17A and 17B show an example of removing the resin remaining on the outer periphery of the single-core coated optical fiber. FIG. 17B is a cross-sectional view taken along the line AA in FIG. However, in FIG. 17A, a single-core coated optical fiber is omitted. 17A and 17B, 10 is a resin removal tool, 11 is a gripping part, 120 is a resin removal sheet, 13 is a pedestal part, and 112 is a single-core coated optical fiber.

  When the resin remaining on the outer periphery of the single-core coated optical fiber is removed, the single-core coated optical fiber 112 is squeezed with a pressing force applied. At this time, as shown in FIG. In addition, the single-core coated optical fiber 112 may be sharply bent at the edge of the resin removal sheet 12, and the optical fiber may be broken.

  18A and 18B are schematic views of a resin removal tool for avoiding the breakage of the optical fiber due to bending. FIG. 18B is a cross-sectional view taken along the line AA in FIG. 18A and 18B, 10 is a resin removal tool, 11 is a gripping part, 120 is a resin removal sheet, 13 is a pedestal part, and 15 is a mounting surface. The attachment surface 15 has a flat central portion and a convex curved edge. It suffices that at least the edge of the attachment surface in the longitudinal direction of the single-core coated optical fiber 112 to be sandwiched is a convex curved surface.

  The structure of the attachment surface 15 is preferably such that the resin removal sheet 120 comes into surface contact when a lateral pressure is applied to the grip portion 11 from the outside and the single-core coated optical fiber is sandwiched between the resin removal sheets 120. Therefore, as shown in FIG. 18B, the cross section of the mounting surface of the resin removal sheet 120 is such that the center of the cross section in the longitudinal direction of the optical fiber to be sandwiched is linear and the edge thereof is convex. is there. The inside of the grip 11 on the mounting surface of the resin removal sheet 120 may be hollow or dense.

  With the structure shown in FIGS. 18A and 18B, a single core is formed at the edge of the resin removal sheet even if the single-core coated optical fiber is squeezed while pressing force is applied. Since the coated optical fiber does not bend sharply, it is possible to avoid breakage of the optical fiber.

  Schematic diagrams of other resin removal tools for avoiding breakage of the optical fiber due to bending are shown in FIGS. 19 (A) and 19 (B). FIG. 19B is a cross-sectional view taken along line AA in FIG. 19A and 19B, 10 is a resin removal tool, 11 is a gripping part, 120 is a resin removal sheet, 13 is a pedestal part, and 15 is a mounting surface. The attachment surface 15 has a semicylindrical shape.

  As shown in FIG. 19B, the cross section of the attachment surface 15 of the resin removal sheet 120 is a semicircular cross section in the longitudinal direction of the optical fiber to be sandwiched. The inside of the grip 11 on the mounting surface of the resin removal sheet 120 may be hollow or dense.

  By adopting the structure as shown in FIGS. 19A and 19B, the single-core coated optical fiber does not bend sharply at the edge of the resin removal sheet 120, so that the optical fiber is not broken. It becomes possible. Further, since the pressing force concentrates on the ridgeline of the semi-cylinder when the single-core coated optical fiber is sandwiched, the force for sandwiching the single-core coated optical fiber is increased, so even if the lateral pressure applied to the gripping portion 11 from the outside is small Work becomes easy.

  The present invention can be applied to optical fiber connection work.

10: Resin removal tool 11: Grasping part 12: Resin removal sheet 13: Base part 14: Elastic layer 15: Mounting surface 110: Optical fiber 111: Residual resin 112: Single-core coated optical fiber 113: Cover 120: Resin removal sheet 121: Fine particles 122: Fiber 123: Base material 124: Adhesive

Claims (8)

A resin removal sheet having fibers formed on the sheet surface and fine particles arranged between the fibers, and by squeezing the single-core coated optical fiber in the longitudinal direction while sandwiching the single-core coated optical fiber from the radial direction, Removing the resin remaining on the outer periphery of the single-core coated optical fiber;
The particle size of the fine particles is equal to or less than the thickness of the coating of the single-core coated optical fiber,
Resin removal method. The resin removal method according to claim 1 , wherein the fibers are formed in a raised shape on the sheet surface. A resin removal tool for removing resin remaining on the outer periphery of a single-core coated optical fiber,
A resin removal sheet having fibers formed on the sheet surface and fine particles having a particle diameter disposed between the fibers equal to or less than the thickness of the coating of the single-core coated optical fiber;
A gripping part for gripping by hand so that the single-core coated optical fiber is clamped in the longitudinal direction of the single-core coated optical fiber while sandwiching the single-core coated optical fiber from the radial direction with the resin removal sheet respectively attached to two opposing mounting surfaces;
A resin removal tool comprising: The resin removing tool according to claim 3 , wherein the fibers are formed in a raised shape on the sheet surface. The length of the single-core coated optical fiber that is sandwiched by the resin removal sheet is L (mm), the number of single-core coated optical fibers that are sandwiched is M (number), and the force that sandwiches the single-core coated optical fiber is F (N). When the lateral pressure P applied to the single-core coated optical fiber represented by P = F / (L × M) is 30 (N / mm · number) or less,
5. The resin removal tool according to claim 3 , further comprising an elastic layer disposed between an attachment surface of the grip portion and a sheet surface of the resin removal sheet. The length of the single-core coated optical fiber that is sandwiched by the resin removal sheet is L (mm), the number of single-core coated optical fibers that are sandwiched is M (number), and the force that sandwiches the single-core coated optical fiber is F (N). When the lateral pressure P applied to the single-core coated optical fiber represented by P = F / (L × M) is 30 (N / mm · number) or less,
The resin removal tool according to claim 3 or 4 , further comprising a spring that exerts a pinching force on the grip portion. The center portion of the mounting surface of the gripping portion is planar, and at least the edge portion of the mounting surface in the longitudinal direction of the single-core coated optical fiber to be sandwiched is a convex curved surface among the edge portions of the mounting surface of the gripping portion. The resin removal tool according to any one of claims 3 to 6 , wherein The resin removal tool according to any one of claims 3 to 6 , wherein a mounting surface of the grip portion is a semi-cylindrical shape, and a cross section in a longitudinal direction of the sandwiched optical fiber is semi-circular. .

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