JP2008058848A - Method and tool for separating coated optical fiber ribbon - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and tool for separating a coated optical fiber ribbon stepwise into primary optical fiber parallel units and element optical fibers. <P>SOLUTION: A coated optical fiber ribbon is placed on rugged parts 130 of a separating tool 100, and then arms 101, 102 are closed to pressurize the rugged parts 130, 130 to both sides of the coated optical fiber ribbon. In this state, the coated optical fiber ribbon is pulled in the longitudinal direction, relatively moving the rugged parts 130, 130 and the coated optical fiber ribbon. As a result, the coated optical fiber ribbon is separated into a plurality of primary optical fiber parallel units. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to an optical fiber ribbon separation method for separating optical fiber ribbons formed by further arranging a plurality of primary optical fiber parallel units made of a plurality of single-core optical fibers in a horizontal row, and It relates to a separation tool.

  In recent years, the construction of optical subscriber line networks has been progressing rapidly, and the required specifications for optical line networks have also diversified. Along with this, the intermediate post-branching method of the optical fiber ribbon has also been diversified. For example, from a four-core optical fiber ribbon consisting of four optical fibers, a single-core optical fiber immediately, That is, there is a system in which optical fiber strands are separated and connected to a drop cable for wiring the optical fiber core wires to the eaves of each house.

  As another intermediate post-branching method, the 8-fiber ribbon is first separated into two 4-fiber ribbons, and one of the separated 4-fiber ribbons is converted into a single fiber ribbon. Separation method or 8-fiber optical fiber ribbon is first separated into 4 2-fiber ribbons, and at least one 2-fiber ribbon is single fiber optic There is a method of separating, etc.

  In the intermediate post-branching method, a predetermined separation tool is used to separate the optical fiber ribbon formed by arranging a plurality of optical fiber strands. Several proposals have been known so far.

  An optical fiber ribbon is composed of a plurality of single-core optical fibers arranged in a horizontal row, and the outer periphery thereof is collectively covered to form a primary optical fiber parallel unit, and a plurality of primary optical fiber parallel units are formed. , Arranged in a horizontal row and connected or integrated with resin.

  An example of the optical fiber is shown in FIG. The optical fiber 1 has a structure in which a glass optical fiber 2 is covered with an ultraviolet curable resin layer 3 and an outer periphery thereof is covered with a colored layer 4. An example of an optical fiber ribbon formed using the optical fiber 1 is shown in FIG.

  The optical fiber ribbon 10 shown in FIG. 16 (a) has four primary optical fiber parallel units 5 each composed of two single-core optical fibers 1 arranged in a horizontal row, and adjacent primary optical fiber parallel units 5 are arranged. This is a bind type optical fiber ribbon in which a bonding resin 11 is injected and bonded into a concave portion generated in the connecting portion. Also, the optical fiber tape core wire 20 shown in FIG. 16B has four primary optical fiber parallel units 5 arranged in a horizontal row in the same manner as the optical fiber tape core wire 10, and the whole is covered with a batch coating resin 21. 1 is a coated capsule type optical fiber ribbon.

  In the optical fiber ribbons 30 and 40 shown in FIGS. 16C and 16D, the primary optical fiber parallel unit 6 is composed of four single-core optical fibers 1. Similar to the optical fiber ribbon 10, the optical fiber ribbon 30 is a bind-type optical fiber ribbon in which two primary optical fiber parallel units 6 are bonded with a bonding resin 31. Is a capsule-type optical fiber ribbon in which two primary optical fiber parallel units 6 are collectively covered with a batch coating resin 41 as in the case of the optical fiber ribbon 20.

  As a method for separating the optical fiber ribbon formed as described above and a separation tool used therefor, for example, there are those disclosed in Patent Documents 1 to 3. The separation tools described in Patent Documents 1 and 2 are both configured to directly apply a shearing force in the thickness direction of the optical fiber ribbon, and there is a method of dividing the optical fiber ribbon into two by the shearing force. Proposed. Further, Patent Document 3 describes a method of separating optical fiber strands by scratching or peeling off the batch coating resin of the optical fiber ribbon with a tool made of a plurality of wires.

As yet another method of separating the optical fiber ribbon, for example, by scraping off the batch coating resin of the tape strand with a blade attached to a jig such as a plane, A method is known in which a portion located between the core wires of the collective coating resin is scratched with a blade and separated into optical fiber strands by cutting.
Japanese Examined Patent Publication No. 6-70683 JP 2002-40263 A Japanese Patent No. 3714423

  However, the conventional optical fiber ribbon separation method and separation tool have the following problems. In the separation tool described in Patent Documents 1 and 2, it is possible to divide the 4-core optical fiber ribbon into two, but using the same separation tool, further separate the 2-core optical fiber tape into optical fiber strands. This is impossible, and it has been necessary to use another separating tool to separate the optical fiber.

  In the separation tool described in Patent Document 3, the flexible wire is pressed against the optical fiber ribbon repeatedly to be released, and further moved relative to the longitudinal direction several times. Since it needs to be damaged, it takes time to separate the optical fiber ribbon. Further, in this method, it is possible to separate the optical fiber strands, but it is also impossible to separate each primary optical fiber parallel unit.

  Further, in the above-mentioned canna method and tearing method, it is possible to separate the optical fiber ribbon into a plurality of optical fiber strands, but from the capsule type or bind type optical fiber tape core, the primary optical fiber parallel unit Separation into was extremely difficult.

  As described above, in the intermediate post-branch where it is necessary to separate the optical fiber ribbon into primary optical fiber parallel units and then to separate the primary optical fiber parallel units into optical fiber strands, the conventional separation method and When using a separation tool, it is necessary to use a separate separation tool at each separation stage, which not only requires time and effort for preparing the separation tool, but also reduces the work efficiency of performing the intermediate post-branch. As a result, there is a problem that the work cost increases.

  Accordingly, the present invention has been made to solve these problems, and an optical fiber ribbon separation method capable of separating an optical fiber ribbon into a primary optical fiber parallel unit and an optical fiber strand in a stepwise manner. And to provide a separating tool.

  According to a first aspect of the optical fiber ribbon separation method of the present invention, at least two primary optical fiber parallel units formed by collectively covering the outer periphery of a plurality of optical fiber strands arranged in a horizontal row are provided. A method of separating optical fiber ribbons that are further aligned in a horizontal row and connected or integrated with a resin, wherein the optical fiber ribbons are pressed at the concavo-convex portions provided with a plurality of small protrusions, The optical fiber tape core wire is separated into the primary optical fiber parallel units by moving the concavo-convex portion relative to the longitudinal direction of the optical fiber tape core wire.

  In another aspect of the method for separating an optical fiber ribbon according to the present invention, at least a shearing force is applied in a thickness direction of the optical fiber ribbon by pressing the optical fiber ribbon with the uneven portion. It is characterized by.

  In another aspect of the method for separating an optical fiber ribbon according to the present invention, the small projections are provided upright with a predetermined width in a direction perpendicular to the direction of movement relative to the optical fiber ribbon. It is characterized by using the said uneven | corrugated | grooved part currently used.

In another aspect of the method for separating an optical fiber ribbon according to the present invention, when the width of the primary optical fiber parallel unit is w _u and the predetermined width of the gap is C,
w _u -0.3 ≦ C ≦ w _u +0.3
The concavo-convex part in which the small protrusion is erected so as to satisfy the above condition is used.

  According to another aspect of the method for separating optical fiber ribbons of the present invention, the separated primary optical fiber parallel unit is pressed with a predetermined paper file, and the paper file is at least in the longitudinal direction of the primary optical fiber parallel unit. The primary optical fiber parallel unit is separated into the optical fiber strands by relatively moving at least once.

  Another aspect of the method for separating an optical fiber ribbon according to the present invention is characterized by using the paper file of # 320 or more and # 2000 or less as defined in JIS R6001.

  In another aspect of the method for separating an optical fiber ribbon according to the present invention, a plurality of small protrusions are erected on the same portion of the primary optical fiber parallel unit that is pressed and moved relatively with the paper file. The primary optical fiber parallel unit is separated into the optical fiber strands by further pressing and moving relative to the concave and convex portions.

  In another aspect of the method for separating an optical fiber ribbon according to the present invention, the concavo-convex portion used to separate the optical fiber ribbon into the primary optical fiber parallel unit is used, and the primary optical fiber parallel unit is used as the light. It is used for separating into fiber strands.

  According to a first aspect of the optical fiber ribbon separation tool of the present invention, at least two primary optical fiber parallel units formed by collectively covering the outer periphery of a plurality of optical fiber strands arranged in a horizontal row are provided. An optical fiber tape core wire separation tool that is further arranged in a horizontal row and connected or integrated with a resin, comprising a concavo-convex portion in which a plurality of small protrusions are erected, wherein the concavo-convex portion includes the optical fiber tape. The optical fiber ribbon is subjected to at least shearing force in the thickness direction and is separated into the plurality of primary optical fiber parallel units by pressing and moving the core relatively. Features.

  In another aspect of the optical fiber tape core separating tool according to the present invention, the small protrusions have a predetermined width in a direction perpendicular to a direction in which the concavo-convex portion is moved relative to the optical fiber tape core wire. It is provided and is erected.

In another aspect of the fiber optic tape core separating tool of the present invention, when the width of the primary optical fiber parallel unit is w _u and the predetermined width of the gap is C,
w _u -0.3 ≦ C ≦ w _u +0.3
The small protrusion is erected so as to satisfy the above condition.

In another aspect of the optical fiber ribbon separator of the present invention, the small protrusion has a height of 0.25 mm or more and 3 mm or less, a cross-sectional area of 0.01 mm ² or more and 0.2 mm ² or less, and Rockwell hardness. Is HRR10 or more and HRM120 or less.

  In another aspect of the optical fiber tape core separating tool according to the present invention, two of the uneven portions are provided so as to be able to press both surfaces of the optical fiber tape core wire, and are erected on each of the two uneven portions. Further, the small protrusions are arranged so as to face each other and overlap each other.

  Another aspect of the fiber optic tape core separating tool according to the present invention further includes a predetermined paper file, and presses the paper file against the separated primary optical fiber parallel unit to relatively move one or more times. Thus, the primary optical fiber parallel unit is configured to be separated into a plurality of the optical fiber strands.

  In another aspect of the optical fiber ribbon separator of the present invention, the paper file is a paper file of # 320 or more and # 2000 or less as defined in JIS R6001.

  In another aspect of the fiber optic tape core separating tool according to the present invention, a predetermined elastic member is provided on a surface opposite to the surface on which the small protrusions of the concavo-convex portion are erected, and the elastic member is pressed. Thus, the concave and convex portions are configured to be pressed against the optical fiber ribbon.

  According to another aspect of the fiber optic tape core separating tool of the present invention, another elastic member is provided on the back surface of the file portion, and the file portion presses the fiber optic tape core wire by pressing the elastic member. It is comprised so that it may be carried out.

  Another aspect of the fiber optic tape core wire separation tool of the present invention includes a pair of arms, one end of each of the arms is rotatably connected to a fulcrum, and the concave and convex portions are formed on the other end of the arm. The pair of arms are provided facing each other, and are biased in a direction in which the two uneven portions are separated.

  Another aspect of the optical fiber tape core separating tool according to the present invention is characterized in that the file portion is further provided at the other end of the pair of arms.

  Another aspect of the optical fiber tape core separating tool according to the present invention is characterized in that the concavo-convex portion and the file portion are arranged in parallel in the longitudinal direction of the arm.

  Another aspect of the separation tool for an optical fiber ribbon according to the present invention is characterized in that the file portion is provided closer to the fulcrum than the concavo-convex portion.

  Another aspect of the fiber optic tape core separating tool according to the present invention is characterized by including a height-adjustable stopper for restricting the closing limit of the pair of arms.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the isolation | separation method and separation tool of the optical fiber tape core wire which can isolate | separate an optical fiber tape core wire into a primary optical fiber parallel unit and an optical fiber strand in steps. Using the same separation tool of the present invention, the optical fiber ribbon can be separated into a plurality of primary optical fiber parallel units, and the primary optical fiber parallel unit can be further separated into a plurality of optical fiber strands. Therefore, it is possible to increase the work efficiency of the intermediate rear branch and reduce the cost.

  A method for separating an optical fiber ribbon and a separation tool according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. In addition, about each structural part which has the same function, the same code | symbol is attached | subjected and shown for simplification of illustration and description.

  FIG. 1 is a perspective view showing the structure of a separation tool for an optical fiber ribbon according to an embodiment of the present invention. An optical fiber ribbon separating tool 100 according to the present embodiment includes a pair of arms 101 and 102, and a connection convex portion 103 and a connection concave portion 104 are formed at one end of each of the arms. . A connecting projection 103 is inserted into the connecting recess 104 and is pivotally connected at a fulcrum 105. For example, a plate spring or a coil spring (not shown) is provided between the connecting concave portion 103 and the connecting convex portion 104 so that the other end that is not connected is opened when no force is applied to the arms 101 and 102. It is good to get it.

  At the other end of the arms 101 and 102, a file portion 120 and an uneven portion 130 are provided via an elastic member 110 formed of rubber or the like. In addition, a stopper 106 capable of adjusting the height is provided at an appropriate position of the arm 101, thereby restricting the closing of the arms 101 and 102. As the stopper 106, for example, a male screw can be used, and its height can be adjusted by rotating the screw.

  FIG. 2 shows a state where the arms 101 and 102 are closed. This figure shows a state in which the arms 101 and 102 are closed by the stopper 106. In this state, the file portions 120 and 120 and the uneven portions 130 and 130 provided on the arms 101 and 102, respectively, are mutually connected. It is preferable to adjust the height of the stopper 106 so as to be parallel.

  The structure of the elastic member 110, the file part 120, and the uneven part 130 provided at the open ends of the arms 101 and 102 will be described with reference to FIG. The elastic member 110 can be formed of, for example, silicon rubber, and is bonded to the arms 101 and 102 with a double-sided tape or an adhesive. The file portion 120 is formed by adhering a paper file having substantially the same size as the elastic member 110 to the elastic member 110 with a double-sided tape or an adhesive. The paper file used for the file unit 120 may be # 320 or more and # 2000 or less as defined in JIS R6001.

  The uneven portion 130 is also approximately the same size as the elastic member 110, and is adhered to the elastic member 110 with a double-sided tape or an adhesive. The detailed structure of the uneven part 130 is shown in FIG. FIG. 4 is an enlarged view of a part of the uneven portion 130. The concavo-convex portion 130 can be a sheet-like member made of polypropylene, for example, and a plurality of small protrusions 131 are erected on the surface.

  FIG. 5 shows a joined state of the uneven portion 130 when the arms 101 and 102 are closed. The concavo-convex portion 130 attached to the arm 101 and the concavo-convex portion 130 attached to the arm 102 are arranged such that the tips of the small protrusions 131 erected on each other coincide and overlap.

  When the separating tool 100 is used for separating the optical fiber ribbon, the opening limit is normally set so that the separating tool 100 is opened to an angle that can be grasped with one hand as shown in FIG. When performing maintenance, it is preferable to set an open limit so that the arms 101 and 102 can be fully opened (approximately 180 degrees), as shown in FIG. As a result, maintenance work such as maintenance or replacement of the file part 120 and the uneven part 130 can be easily performed, and the efficiency of the maintenance work can be increased.

  In order to set the opening limit of the separation tool 100 as described above, the arms 101 and 102 can be opened to about 180 degrees, and the arms 101 and 102 are held near the normal opening limit. A ball plunger or leaf spring should be installed.

  Next, an example of the dimensions and the like of the separation tool 100 will be described below with reference to FIGS. First, when the width direction of the arms 101 and 102 is the X direction and the longitudinal direction is the Y direction, the thickness of the elastic member 110 is 3 mm, the dimension A in the X direction is 15 mm, and the dimension B in the Y direction is 10 mm. It can be. Further, as described above, it is preferable to use a paper file of # 320 or more and # 2000 or less as defined in JIS R6001, and here, a # 800 paper file is used.

About the small protrusion 131 standingly arranged by the uneven | corrugated | grooved part 130, a preferable magnitude | size, arrangement | positioning, etc. can be selected corresponding to the optical fiber tape core wire of separation object. An example is shown in FIG. In FIG. 7, the diameter of the optical fiber 1 (element diameter), the width of the primary optical fiber parallel unit 5 or 6 (unit width), and the width of the optical fiber ribbons 10 to 40 (tape width). The separation C and the influence degree when the distance C, the height H, the cross-sectional area Z, and the hardness of the small protrusions 131 are changed are shown. The unit of each numerical value is mm except for the cross-sectional area Z and the hardness, and the cross-sectional area Z is represented by mm ² .

  In the separability of the primary optical fiber parallel unit, it is evaluated whether or not the primary optical fiber parallel unit can be separated within 10 times of the pressing movement of the concavo-convex part 130. Furthermore, the case which can be separated within 10 times is evaluated by ◎. In addition, as the degree of influence on the primary optical fiber parallel unit, a case where the unit is maintained as it is is evaluated as ○, and a case where the unit is particularly small is evaluated as ◎.

Each dimension of the small protrusion 131 is as shown in FIG. When the width of the primary optical fiber parallel unit 5 or 6 was _{w u,} the evaluation results shown in FIG. 7, the distance C of the small projections 131 _{w u -0.3 ≦ C ≦ w u} +0.3 ( Equation 1)
It is preferable that the concavo-convex portion 130 is erected so as to satisfy the above condition.

The separation tool 100 of the present embodiment, which is intended for the 2-core × 4 bind type optical fiber ribbon and the 2-core × 4 capsule type optical fiber ribbon shown in FIGS. It is good to set it as such dimensions. In the case of a 2 core × 4 bind type optical fiber tape core and a 2 core × 4 capsule type optical fiber ribbon, the width w _u of the primary optical fiber parallel unit 5 is usually about 0.51 to 0.55 mm. is there.

Therefore, the width C in the Y direction among the widths of the gaps between the adjacent small protrusions 131 shown in FIG. 4 is preferably about 0.2 to 0.8 mm (for example, 0.4 mm) that satisfies Expression 1. Further, the cross-sectional area Z of the small protrusion 131 is 0.01 to 0.2 mm ² (for example, 0.02 mm ² ), the height H is about 0.25 to 3 mm (for example, 0.3 mm), and the hardness is Rockwell hardness R scale. Therefore, it is preferable to set it to about HRR10 to HRM120 (for example, HRR90) (FIG. 7). In addition, the cross-sectional shape of the small protrusion 131 is circular in this embodiment.

  Next, a method for separating the optical fiber ribbon of the present invention will be described. Here, using the separation tool 100 described above, the 2-core × 4-bind type optical fiber tape core wire 10 shown in FIG. 16A is separated into primary optical fiber parallel units 5, and each primary optical fiber parallel is further separated. A method of separating the unit 5 into the optical fiber 1 will be described with reference to FIG.

  First, the optical fiber tape core wire 10 is placed on the concavo-convex portion 130 of the separation tool 100, the arms 101 and 102 are closed, and the concavo-convex portions 130 and 130 are pressed on both surfaces of the optical fiber tape core wire 10 (FIG. 8 ( a)). FIG. 9A shows a state where the optical fiber ribbon 10 is pressed by the small protrusion 131 of the concavo-convex portion 130. In this state, by pulling the optical fiber ribbon 10 in the X direction, the concave and convex portions 130 and 130 and the optical fiber ribbon 10 are relatively moved (FIG. 8B).

  As described above, when the concavo-convex portions 130 and 130 are relatively moved while pressing both surfaces of the optical fiber ribbon 10, shear force is generated in the thickness direction of the optical fiber ribbon 10, or shear force is generated. In addition to the above, by peeling the bonding resin 11, the optical fiber ribbon 10 is separated into the respective primary optical fiber parallel units 5. The separated primary optical fiber parallel unit 5 is dropped into a gap formed by overlapping the upper and lower small protrusions 131 and 131. FIG. 9B shows a state where the optical fiber ribbon 10 is separated into a plurality of primary optical fiber parallel units 5.

  When the separated primary optical fiber parallel unit 5 is further separated into individual optical fiber strands, the primary optical fiber parallel unit 5 is placed on the file part 120 of the separation tool 100, and then the arms 101, 102 are placed. Is closed and the file parts 120 and 120 are pressed on both surfaces of the primary optical fiber parallel unit 5 (FIG. 8C). In this state, the primary optical fiber parallel unit 5 is pulled in the X direction at least once, so that the files 120 and 120 and the primary optical fiber parallel unit 5 are relatively moved (FIG. 8D). Thereby, the coating | coated surface of the primary optical fiber parallel unit 5 is rubbed and scratched.

  As shown in FIG. 8A, the primary optical fiber parallel unit 5 with the coating surface scratched as described above is then placed on the concavo-convex portion 130, and then the arms 101 and 102 are closed to make the primary The concave and convex portions 130 and 130 are pressed on both surfaces of the optical fiber parallel unit 5. In this state, by pulling the primary optical fiber parallel unit 5 in the X direction, the concave and convex portions 130 and 130 and the primary optical fiber parallel unit 5 are relatively moved (FIG. 8B).

  Thereby, the scratch | flaw attached to the coating | coated surface of the primary optical fiber parallel unit 5 is spread by the small protrusion 131, and is isolate | separated into each optical fiber strand 1. FIG. The separated optical fiber 1 is dropped into a gap formed by overlapping the upper and lower small protrusions 131 and 131.

  As shown in FIG. 10, since the optical fiber 1 enters the gap between the small protrusions 131, 131, the optical fiber 1 is not pressed and damaged by the small protrusions 131. In addition, by setting the height of the small protrusion 131 appropriately, it is possible to prevent a trouble that the optical fiber 1 enters the gap between the small protrusions 131 and 131 and cannot be easily taken out. Further, it is possible to prevent the optical fiber 1 from being pressed and damaged at the bottom of the gap between the small protrusions 131 and 131.

  According to the separation tool 100 of the present embodiment, the uneven portion used for separating the optical fiber ribbon 10 into a plurality of primary optical fiber parallel units 5 and the separated primary optical fiber parallel units 5 are further divided into a plurality of It is not necessary to change the material, height, cross-sectional area, interval pitch, etc., with the concavo-convex portion used to separate the optical fiber 1, and the same concavo-convex portion 130 provided in the separation tool 100 can be used. it can. As a result, the operation of separating the optical fiber ribbon 10 and the operation of separating the primary optical fiber parallel unit 5 can be processed as continuous operations.

  The result of applying the separation tool 10 for separating the above-described two-core × 4 bind type optical fiber tape core wire 10 to the separation of the 2-core × 4 capsule type optical fiber tape core wire 20 shown in FIG. This will be described below. By pressing the concavo-convex portion 130 of the separation tool 100 against both surfaces of the 2-core × 4 capsule-type optical fiber ribbon 20 and moving it relative to the X direction, the 2-fiber × 4-capsule-type optical fiber ribbon is collectively collected. The surface of the coating resin is peeled off. By performing the relative movement a plurality of times, the 2-core × 4-capsule type optical fiber ribbon 20 is separated into a plurality of primary optical fiber parallel units 5, and the small protrusions 131, 131 provided above and below the separation tool 100 overlap each other. Into the gap formed.

Next, with respect to the separation tool 100 used for separating the 4-core × 2 bind type optical fiber tape core wire 30 and the 4-core × 2 capsule type optical fiber tape core wire 40 shown in FIGS. Explained. As shown in FIG. 7, the width w _u of the primary optical fiber parallel unit 6 constituting the 4-core × 2-type optical fiber ribbon is usually about 1.02 to 1.15 mm. Therefore, the width C in the X direction of the gap formed between the small protrusions 131 can be about 0.7 to 1.4 (for example, 0.8 mm). Further, the cross-sectional area Z of the small protrusion 131 is 0.01 to 0.2 mm ² (for example, 0.02 mm ² ), the height H is about 0.25 to 3 mm (for example, 0.3 mm), and the hardness is Rockwell hardness R scale. Therefore, it is preferable to set it to about HRR10 to HRM120 (for example, HRR90) (FIG. 7).

  Even when the 4-fiber × 2 bind type optical fiber tape core wire 30 and the 4-core × 2 capsule type optical fiber tape core wire 40 are separated using the separation tool 100 having the above dimensions, the optical fiber tape core is formed by the concavo-convex portion 110. By pressing and relatively moving the wire 30 or 40, a shearing force or the like is applied in the thickness direction of the optical fiber ribbon 30 or 40, and the primary optical fiber parallel unit 6 is separated (FIG. 11).

As another example of the separation tool of the present invention, the file part 120 and / or the uneven part 130 may be pressed against one side of the optical fiber ribbon. Further, even when the two concavo-convex portions are configured to press both surfaces of the optical fiber ribbon, the concavo-convex portions can be formed so as not to overlap each other. Further, when the cross-section of the small protrusion has a rounded shape or the like as in the above embodiment, or when the tip of the small protrusion is rounded as shown in FIG. It is preferable in terms of suppression.

  The concavo-convex part is formed by integrally molding small protrusions with resin, or formed by embedding resin, vegetable or animal fiber small protrusions in a resin, wooden or metal base material. Various things, such as a thing, can be applied. The file part can be made of metal, ceramic, or the like as appropriate in addition to the paper file.

  The separation tool has a structure in which a pair of arms can be opened and closed, a structure in which a filed portion and an uneven portion can be pressed by a linear motion mechanism (FIG. 13), and a tool that can be pressed by an independent member (FIG. 14) and the like can be applied. In addition, the optical fiber tape core wire to which the separation tool and the separation method of the present invention can be applied is not limited to 2 cores × 4 types, 4 cores × 2 types, but 2 cores × 2 types, 4 cores × 3 types, 4 cores. Applicable to various optical fiber ribbons such as × 4 type.

  In the separation tool of the present invention, a commercially available paper file and a mesh for a hook-and-loop fastener can be used as the file part and the uneven part, respectively, and the preparation and maintenance of the separation tool can be performed very easily and at low cost. Is possible.

  In addition, the description in this Embodiment shows an example of the separation method and separation tool of the optical fiber ribbon based on this invention, It is not limited to this. The method for separating the optical fiber ribbon and the detailed configuration and detailed operation of the separating tool in the present embodiment can be changed as appropriate without departing from the spirit of the present invention.

It is a perspective view of the separation tool concerning the embodiment of the present invention. It is a perspective view of the state where the separation tool concerning the embodiment of the present invention was closed. It is a perspective view of the file part and uneven | corrugated | grooved part of the separation tool which concerns on embodiment of this invention. It is an expansion perspective view of the uneven | corrugated | grooved part of the separation tool which concerns on embodiment of this invention. It is an expanded sectional view of the uneven part of the separation tool concerning the embodiment of the present invention. It is a top view when the separation tool which concerns on embodiment of this invention is fully opened. It is a table | surface which shows the result of having evaluated the magnitude | size, arrangement | positioning, etc. of the small processus | protrusion standingly arranged by the uneven | corrugated | grooved part. It is a perspective view which shows the separation method which concerns on embodiment of this invention. It is a schematic diagram which shows the separation process when using the separation tool which concerns on embodiment of this invention. It is a schematic diagram which shows the separation process when using the separation tool which concerns on embodiment of this invention. It is a schematic diagram which shows the separation process when using the separation tool which concerns on embodiment of this invention. It is the elements on larger scale of the separation tool which concerns on another embodiment of this invention. It is sectional drawing of the separation tool which concerns on another embodiment of this invention. It is sectional drawing of the separation tool which concerns on another embodiment of this invention. It is sectional drawing of an optical fiber strand. It is sectional drawing of an optical fiber tape core wire.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical fiber 2 Glass optical fiber 3 Ultraviolet curable resin layer 4 Colored layer 5 Primary optical fiber parallel unit 6 Primary optical fiber parallel unit 10, 20, 30, 40 Optical fiber tape core wire 11, 31 Bonding resin 21, 41 Collective coating resin 100 Separation tool 101, 102 Arm 103 Connection convex portion 104 Connection concave portion 105 Support point 106 Stopper 110 Elastic member 120 File portion 130 Concavity and convexity
131 Small protrusion

Claims (22)

Light in which at least two or more primary optical fiber parallel units formed by collectively covering the outer periphery of a plurality of optical fiber strands arranged in a horizontal row are further arranged in a horizontal row and connected or integrated with resin. A method of separating fiber ribbons,
Pressing the optical fiber ribbon at the concavo-convex portion provided with a plurality of small protrusions,
Separating the optical fiber ribbons by separating the optical fiber ribbons into the primary optical fiber parallel unit by moving the concavo-convex part relative to the longitudinal direction of the optical fiber ribbons. Method. 2. The optical fiber tape core wire according to claim 1, wherein at least a shearing force is applied in a thickness direction of the optical fiber tape core wire by pressing the optical fiber tape core wire with the uneven portion. Method. 2. The uneven portion in which the small protrusions are erected with an interval of a predetermined width in a direction perpendicular to the direction of movement relative to the optical fiber ribbon. The method for separating an optical fiber ribbon according to claim 2. When the width of the primary optical fiber parallel unit is w _u and the predetermined width of the gap is C,
w _u -0.3 ≦ C ≦ w _u +0.3
4. The method of separating an optical fiber ribbon according to claim 3, wherein the concavo-convex part in which the small protrusions are erected so as to satisfy the above condition is used. Press the separated primary optical fiber parallel unit with a predetermined paper file,
2. The primary optical fiber parallel unit is separated into the optical fiber strands by moving the paper file relatively at least once in the longitudinal direction of the primary optical fiber parallel unit. The method for separating an optical fiber ribbon according to claim 4. 6. The method of separating an optical fiber ribbon according to claim 5, wherein the paper file of # 320 or more and # 2000 or less as defined in JIS R6001 is used. The primary optical fiber parallel unit, which is pressed and relatively moved by the paper file, is further pressed and moved relatively by the concave and convex portions provided with a plurality of small protrusions, thereby moving the primary optical fiber parallel unit. The method for separating an optical fiber ribbon according to claim 5 or 6, wherein an optical fiber parallel unit is separated into the optical fiber strands. 8. The uneven portion used for separating the optical fiber ribbon into the primary optical fiber parallel unit is used for separating the primary optical fiber parallel unit into the optical fiber. A method for separating an optical fiber ribbon as described in 1. Light in which at least two or more primary optical fiber parallel units formed by collectively covering the outer periphery of a plurality of optical fiber strands arranged in a horizontal row are further arranged in a horizontal row and connected or integrated with resin. A fiber tape core separating tool,
It has an uneven part with a plurality of small protrusions standing upright,
By pressing and relatively moving the optical fiber ribbon in the uneven portion, the optical fiber ribbon is subjected to at least a shearing force in the thickness direction and separated into the plurality of primary optical fiber parallel units. It is comprised so that it may be comprised. The separation tool of the optical fiber tape core wire characterized by the above-mentioned. 10. The small protrusions are erected with a predetermined width interval in a direction perpendicular to a direction in which the uneven portion is moved relative to the optical fiber ribbon. Fiber optic tape core wire separation tool. When the width of the primary optical fiber parallel unit is w _u and the predetermined width of the gap is C,
w _u -0.3 ≦ C ≦ w _u +0.3

The optical fiber tape core wire separation tool according to claim 10, wherein the small protrusions are erected so as to satisfy the above condition.
The small protrusion has a height of 0.25 mm or more and 3 mm or less, a cross-sectional area of 0.01 mm ² or more and 0.2 mm ² or less, and a Rockwell hardness of HRR 10 or more and HRM 120 or less. The separation tool for an optical fiber ribbon according to claim 11.
A predetermined elastic member is provided on a surface opposite to the surface where the small protrusions of the uneven portion are erected, and the uneven portion is pressed against the optical fiber ribbon by pressing the elastic member. It is comprised, The separation tool of the optical fiber tape cable core of any one of Claim 9 to 12 characterized by the above-mentioned.   The concavo-convex portions are provided so as to be capable of pressing both surfaces of the optical fiber ribbon, and the small protrusions erected on each of the two concavo-convex portions are arranged so as to face each other and overlap each other. The separation tool for an optical fiber ribbon according to any one of claims 9 to 13. Further provided with a predetermined paper file,
The primary optical fiber parallel unit is configured to be separated into a plurality of the optical fiber strands by pressing the paper file against the separated primary optical fiber parallel unit and moving it relatively once or more. The separation tool for an optical fiber ribbon according to any one of claims 9 to 14, wherein the separation tool is provided. The optical fiber tape core separating tool according to claim 15, wherein the paper file is a paper file of # 320 or more and # 2000 or less as defined in JIS R6001. The back surface of the said file part is equipped with another elastic member, The said file part is comprised so that the said optical fiber tape core wire may be pressed by pressing the said elastic member, The Claim 15 or Claim characterized by the above-mentioned. Item 17. A fiber optic tape core wire separation tool according to Item 16. A pair of arms is provided, one end of each of the arms is pivotally connected to a fulcrum, the concave and convex portions are provided at the other end of the arm, and the pair of arms are biased in a direction away from each other. The separation tool for an optical fiber ribbon according to any one of claims 9 to 17, wherein the separation tool is used. A pair of arms, wherein one end of each of the arms is rotatably connected to a fulcrum, the concave and convex portions are formed on the other end of the arm, and the pair of arms are urged away from each other, The optical fiber tape core wire separation tool according to any one of claims 16 to 17, wherein the file portion is further provided at the other end of the arm. The separation tool for an optical fiber ribbon according to claim 19, wherein the uneven portion and the file portion are arranged in parallel in the longitudinal direction of the arm. The separation tool for an optical fiber ribbon according to claim 20, wherein the file portion is provided closer to the fulcrum than the concavo-convex portion. The optical fiber tape core wire separation tool according to any one of claims 18 to 21, further comprising a height-adjustable stopper for restricting a closing limit of the pair of arms.

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