JP5469051B2 - Tape core dividing tool - Google Patents

Description

  The present invention relates to a tape core wire splitting tool for splitting an intermittently fixed tape core wire in which connecting portions between adjacent optical fibers are intermittently provided in the longitudinal direction of the tape core wire into single fiber optic fibers.

For example, in an optical subscriber network, when an optical fiber ribbon is taken out from an optical cable such as a trunk line and pulled to the subscriber side, there is usually an operation of dividing the optical fiber ribbon into one or a small number of optical fibers. Necessary. In the work, it is important to divide a plurality of optical fibers constituting the optical fiber ribbon without damaging them.
In addition, when it is necessary to divide the optical fiber ribbon of the live line in the live line state, not only does the optical fiber not be damaged, but also temporarily due to bending or side pressure acting on the optical fiber. It is required that transmission loss does not occur and the signal is not disturbed.

An optical fiber ribbon generally has a plurality of optical fibers constituting the optical fiber tape in a tape shape over the entire length of the optical fiber, for example, a plurality of optical fiber strands arranged in a horizontal row. A UV resin as a tape forming material is applied to the entire circumference of the film. In order to divide the optical fiber ribbon having such a structure into single fibers (divide into single fibers), it is necessary to remove the UV resin coating covering the entire circumference of the optical fiber.
As a tool for splitting this type of optical fiber ribbon, there are split tools shown in Patent Documents 1 to 3 and the like.
Although patent document 1 itself is invention about an optical fiber tape core wire, the dividing tool described in patent document 1 is a dividing tool with a flexible wire material which implanted many short flexible wires in the shape of a brush. Then, by rubbing the optical fiber ribbon, the outer UV resin coating is peeled off and divided.

  The splitting tool for the optical fiber ribbon of Patent Document 2 is a splitting tool having a plurality of substantially circular projections made of polymer resin, and the projections of the splitting tool are brought into contact with the upper and lower surfaces of the tape ribbon. In this case, the tape core wire is squeezed in the longitudinal direction, whereby the taped resin of the outer sheath is peeled off and divided into a plurality of single-core optical fibers (called single-fiber split).

The splitting tool for the optical fiber ribbon of Patent Document 3 holds the optical fiber ribbon with the movable splitting member and the stationary splitting member that are relatively slidably in contact with each other, and slides the movable splitting member. Thus, a shearing force is applied to the boundary position between the movable dividing member and the fixed dividing member in the optical fiber ribbon, and the optical fiber ribbon is divided at the boundary surface between the optical fiber strands.
In this state, the required length is divided by sliding the dividing tool in the longitudinal direction of the optical fiber ribbon.

  Each of the above conventional dividing tools is intended for a general optical fiber tape in which a plurality of optical fibers constituting the optical fiber ribbon are formed in a tape shape over the entire longitudinal direction of the optical fiber. As an optical fiber tape core wire that can be easily divided, an intermittently fixed tape core wire is known in which connecting portions between adjacent optical fibers are intermittently provided in the longitudinal direction of the tape core wire as in Patent Document 4 and the like. Yes.

JP2007-148270 JP2007-183515 JP-A-8-327829 Japanese Patent No. 4143651

In the dividing tool with a flexible wire described in Patent Document 1 or the dividing tool with many resin protrusions in Patent Document 2, when stripping the taped resin of the jacket by rubbing the tape core wire, The optical fiber is likely to be bent, and a large transmission loss may occur in the optical fiber even during the dividing operation.
Further, until the taped material is peeled off, the tape core wire must be rubbed and rubbed many times, and there is a problem that it takes time to divide the single core and the workability is not good.

When the dividing tool of Patent Document 3 is divided by applying a shearing force to the tape core, if the position in the width direction of the tape core is slightly shifted, the position shifted from the position of the optical fiber strand boundary surface to be divided There is a risk that a shearing force will act on the optical fiber and damage the optical fiber.
In addition, there is only one shear point in one division operation, and the tape core wire can only be divided into two. Therefore, when it is desired to divide the tape core wire into a single core, two or more stages are required. The division work must be done and is not suitable for single-core division.
Further, since the taped resin remains around the optical fiber after the dividing operation, it may be time-consuming to process it when it is necessary to remove it.

Any of the dividing means of each of the above-mentioned tape core wire splitting tools is susceptible to a force that causes light loss such as bending force, and is not suitable for a live optical fiber tape core wire.
Further, in the case of the dividing tool described in Patent Document 1 and the dividing tool described in Patent Document 2, the dividing operation is performed by holding the tool and the tape core wire by hand. Forces that cause loss are likely to act.

On the other hand, the intermittently fixed ribbon of Patent Document 4 can be manually divided into single-core optical fibers without using a special dividing tool.
However, it is necessary to divide the optical fiber ribbon into a single core mainly when an intermediate post-branching operation is performed in the closure. However, there is a problem that it is easy to apply a bending force or the like to the optical fiber in the manual work.
In addition, as described above, the splitting tools of Patent Documents 1 to 3 are likely to be subjected to a force that causes light loss, but are not suitable for the intermittently fixed tape core.

  The present invention was made based on the above-mentioned background, and in particular, for the intermittently fixed tape core wire, there is no bending that causes optical loss in the optical fiber during the division work, and the workability is good. For example, it is an object of the present invention to provide a tape core wire splitting tool that is suitable for application to a split operation of an optical fiber ribbon in a live state in a closure.

The invention of claim 1 for solving the above-mentioned problems, the connecting portion between the optical fiber adjacent to each other in a plurality of optical fiber ribbons in which optical fibers are connected into a tape is intermittently set eclipsed ribbon longitudinally In addition, a tape core wire splitting tool for splitting an intermittently fixed tape core wire having a non-connecting region in which no connection portion between the optical fibers exists at the same position in the longitudinal direction of the core wire into single fiber optic fibers,
It consists of a straight rail and a split tool body that is guided by this rail and can slide.
The split tool main body includes a main body base that is guided by a rail and is slidable, and a lid that is detachably attached to the main body base.
Between the main body base and the lid portion, a tape core wire insertion passage for inserting a tape core wire is formed,
The lid or the main body base has a width capable of entering between the adjacent optical fibers in a non-connected region where no optical fiber connecting portion exists at the same position in the longitudinal direction of the tape core wire. A split action member provided with a plurality of narrow tearing thin pieces at intervals , and a downward biasing force applying means for applying a downward biasing force to the split action member,
When the split tool main body is slid along the rail in a state where the downward biasing force is applied to the split action member, the connecting portion between the optical fibers at the same position in the longitudinal direction of the core of the tape core In the non-connecting region where there is no single piece, each of the tearing pieces of the splitting action member enters and slides between adjacent optical fibers, so that the tape core inserted through the tape core insertion passage becomes the splitting action. A single core is divided by a tearing piece of the member.

  According to a second aspect of the present invention, there is provided the tape core wire dividing tool according to the first aspect, wherein the dividing member is a spring coil, and individual wire portions aligned in the rail width direction at the coil diameter direction end portion of the helical wire of the spring coil. Each of them constitutes a tearing piece.

According to a third aspect of the present invention, in the tape core wire splitting tool according to the first or second aspect, the split action member is provided on the lid portion, and the split biasing force applying means for applying a downward biasing force to the split action member is the splitting member. A spring is provided that elastically presses the action member toward the tape core side.

  According to a fourth aspect of the present invention, in the tape core wire splitting tool according to the third aspect, the lid portion is provided on the side of the main body base so as to be opened and closed by a hinge provided in parallel with the rail.

  According to a fifth aspect of the present invention, there is provided the tape core wire dividing tool according to the fourth aspect, wherein the lid portion is provided on the side of the main body base so as to be opened and closed by a hinge provided in parallel with the rail, and the dividing member. And a rotatable member provided on the lid main body so as to be rotatable by a hinge parallel to the rail width direction, and a spring that elastically biases the rotatable member toward the tape core wire side. Features.

  A tape core for holding the target optical fiber ribbon so as not to move in the longitudinal direction of the rail on one end side of the rail in the tape core splitting tool according to any one of claims 1 to 5 A holding tool is provided.

  A seventh aspect of the present invention is the tape core wire splitting tool according to any one of the first to sixth aspects, wherein the rail is attached to a member in a housing in which the optical fiber tape core wire to be processed for single core splitting is housed. A hanging means that can be hooked is provided.

In the tape core wire splitting tool of the present invention, the tape core wire is held on one end side of the rail while the tape core wire (optical fiber tape core wire) is inserted into the tape core wire insertion passage formed in the split tool body. In this state, when the dividing tool body in which the dividing member is applied with the downward biasing force by the downward biasing force applying means is slid to the other end side along the rail , the longitudinal direction of the core of the tape core wire When the optical fiber is in a non-connecting region where no optical fiber connecting portion exists at the same position of the optical fiber, the tearing piece of the dividing member is moved between all adjacent optical fibers in the tape core (the optical fibers adjacent to each other). Enter the boundary. For example, in the case of a 4-fiber ribbon, the light enters between three optical fibers in the tape width direction. When the split tool main body is further slid, all the connecting portions between adjacent optical fibers of the tape core wire in the range in which the split tool main body is moved are torn by the tearing piece. As a result, the tape core is divided into single cores in a range that is approximately close to the length of the rail.

Thus, by sliding the dividing tool main body linearly along the rail, the tape core passing through the tape core insertion passage of the dividing tool main body is divided into single cores, so the tape core is straight. It is possible to prevent the bending force that causes the optical loss from acting on the optical fiber by dividing the single core in the posture.
The single-fiber splitting of the tape core wire is performed by the narrow tearing piece in the splitting action member entering between the adjacent optical fibers and subsequently moving linearly along the rail, so that the single-core splitting action is achieved. Since the direction of the splitting force is not the cross-sectional direction of the optical fiber but the longitudinal direction of the optical fiber, there is little possibility that a force causing optical loss acts on the optical fiber in this respect.

  When a coil spring is used as the split action member as in claim 2, the individual wire portions arranged in the rail width direction at the coil diameter direction end portion of the helical wire of the spring coil respectively constitute a tearing piece. Since the portion of the wire that enters between the optical fibers has a rounded outer surface and is a part of a spiral, the action of entering between the optical fibers can be effectively achieved while moving in the longitudinal direction of the core wire.

  As in the configuration of claim 5, the lid main body is attached to the side of the main body so as to be openable and closable by a hinge, and the lid main body is pivotably provided by a hinge parallel to the rail width direction. The member is provided with a split action member, and the structure in which the split action member is elastically biased toward the tape core by a spring is a configuration in which the split action member performs the function of dividing the tape core into a single core. Also, it is extremely suitable as workability for performing a single-core splitting operation.

  It is possible to hold the tape core by hand during the single-core splitting operation. However, if a tape core holder is provided on one end side of the rail as in claim 6, the tape core can be held during the single-core splitting operation. This is effective in that the line does not move slowly and is stable and does not generate a force that causes optical loss. Moreover, the workability of the single-core splitting work is also good.

  When the suspension means is provided on the rail as in the seventh aspect, for example, when the optical cable is branched in an aerial optical closure, the rail is hooked on a frame or the like inside the closure, so that the single core of the live tape core Since the division work can be performed, the workability of the division tool of the present invention is more remarkably exhibited.

It is a perspective view of the tape core wire splitting tool of one Example of this invention. The whole structure of the said tape core wire splitting tool was shown typically, (a) is a top view, (b) is a front view. It is a top view of the division | segmentation tool main body in said tape core wire division | segmentation tool. It is a front view of the division tool main body of FIG. It is the left view which abbreviate | omitted a part of FIG. It is a right view which abbreviate | omitted a part of FIG. The detail of the cover part in the said division | segmentation tool main body is shown, (a) is a top view, (b) is a front view, (c) is a left view of (a). It is a figure which shows the state which opened the cover part in FIG. The tape core wire fixing tool in the tape core wire splitting tool of FIG. 1 is shown, (a) is a plan view, and (b) is a left side view of (a). It is a figure explaining the function of the coil spring used as a tearing piece of the split action member in the above-mentioned tape core wire splitting tool, (a) is a state in which the individual wire rod of the coil spring cannot enter between adjacent optical fibers, (B) shows a state in which the individual wires of the coil spring can enter between adjacent optical fibers, and (c) shows a state in which the individual wire of the coil spring is between adjacent optical fibers in the state of (b). It is a figure which shows the state which entered. (A)-(d) is a figure explaining that the wire rod of a coil spring cannot penetrate | invade between adjacent optical fibers, when there is also one connection part between adjacent optical fibers, respectively. (A) is a figure explaining the state used for the tape optical fiber division | segmentation operation | work of the live optical fiber tape optical fiber in an aerial optical closure, and (a) is a schematic of an aerial optical closure. A front view and (b) are side views of the tape core wire dividing tool in (a).

  Hereinafter, a tape core wire dividing tool embodying the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a tape core wire splitting tool 1 according to an embodiment of the present invention, FIG. 2 schematically shows the entire configuration of the tape core wire splitting tool 1, (a) is a plan view, and (b) ) Is a front view.
In the optical fiber ribbon splitting tool of the present invention, a connecting portion 3 between adjacent optical fibers 2a in an optical fiber tape optical fiber 2 in which a plurality of optical fibers are connected in a tape shape is intermittently provided in the longitudinal direction of the optical fiber ribbon. This is a tape core wire splitting tool that splits the intermittently fixed tape core wire 2 into single-core optical fibers.
An optical fiber ribbon (hereinafter, simply referred to as “tape ribbon” in some cases) 2 in the illustrated example is a four-fiber ribbon formed of a so-called UV strand (optical fiber 2a) having a diameter of 0.25 mm. For example, the connecting portion is made of an ultraviolet curable resin or a thermosetting resin.
The tape core wire splitting tool 1 includes a linear rail 5, a split tool body 6 that can be guided and slid by the rail 5, and a tape core wire holder 7 that holds the tape core wire so as not to move. I have.
The rail 5 is a member having a length of about 60 to 80 cm that has a slightly flat and downward U-shaped cross section, and forms a guide groove 5a leaving both ends on the upper surface.
The rail 5 in the illustrated example is provided with a hanging rod (hanging means) 10 that can be hooked on, for example, a frame inside an aerial light closure.

The detailed structure of the divided tool body 6 is shown in FIGS. 3 is a plan view of the split tool body 6, FIG. 4 is a front view thereof, FIG. 5 is a left side view of the main part of FIG. 4, and FIG. 6 is a right side view of the main part of FIG.
The divided tool body 6 includes a body base 8 that can be slid by being guided by the rail 5, and a lid portion 9 that is attached to the body base 8 so as to be opened and closed.
On the lower surface of the main body base 8, a guided convex portion 8 a that protrudes downward and is slidably fitted into the guide groove 5 a of the rail 5 is formed.
A tape core wire insertion passage 11 through which the tape core wire 2 is inserted is formed between the main body base 8 and the lid portion 9.

The lid portion 9 includes a lid body 13 provided on the side of the main body base 8 so as to be opened and closed by a hinge shaft 12 provided in parallel to the longitudinal direction of the rail 5, and a rail width direction (a phrase orthogonal to the rail longitudinal direction). ) And a rotatable member 15 provided on the lid main body 13 so as to be rotatable by a hinge shaft 14 parallel to the hinge shaft 14. The rotatable member 15 is elastic to the tape core side (downward in FIG. 4 and the like). A torsion spring 16 is provided for biasing. In this embodiment, the torsion spring 16 and the rotatable member 15 constitute a downward biasing force applying means for applying a downward biasing force to the split action member (coil spring 21). FIGS. 7A, 7B, and 7C are a plan view, a front view, and a left side view of the main part in a state where the lid 9 is removed from the main body base 8, respectively. Reference numeral 13a denotes a hinge shaft hole into which the hinge shaft 12 is fitted.
As shown in FIG. 8, the lid main body 13 can be opened and closed around the hinge shaft 12 together with the rotatable member 15, and when tilted to the main body base 8 side, a magnet 13 b embedded in the upper surface of the main body base 8. And is held in a closed state on the main body base 8.

The rotatable member 15 includes two swing arms 17 and 17. The two swing arms 17 have a symmetrical shape, and each base end portion is rotatably attached to the hinge shaft 14 and penetrates in the rail width direction opened on the opposite side to the hinge shaft 14. A common shaft 18 is fitted into the hole 17a, and both of them can swing up and down integrally around the hinge shaft 14. The shaft 18 holds a coil spring 21 which is a split action member.
The individual wire rods arranged in the rail width direction at the coil diameter direction end of the spiral wire rod of the coil spring 21 constitute a tearing piece as described below. FIG. 10 is an enlarged view of a part of the coil spring 21 together with the tape core wire 2. In the coil diameter direction end portion (lower end portion in FIG. 10) of the helical wire of the coil spring 21, the rail width direction ( The individual wire portions 21a arranged in the left-right direction in FIG. 10 are each non-connection regions (indicated by d in FIG. 2, for example) in which no optical fiber connection portion exists at the same position in the longitudinal direction of the core of the tape. In the region), a tearing thin piece having a narrow width that can enter between the adjacent optical fibers 2a is formed.
For example, the coil spring 21 has a coil diameter of 3.45 mm and a wire 21 a of 0.26 mm.

  As shown in FIG. 9, the tape core holder 7 includes a holder base 24 that has a groove-like tape core insertion passage 23 and is attached to one end of the rail 5, and a side of the holder base 24. The tape core wire 2 inserted into the tape core wire insertion passage 23 can be held. The presser lid 26 is attracted to a magnet 24 a embedded in the upper surface of the holder base 24 to hold and hold the tape core wire 2.

When the tape core wire 2 is split into a single core by the tape core wire splitting tool 1, the split tool body 6 is positioned near the tape core wire holder 7 at the end of the rail 5, as shown in FIG. deep.
The tape core wire 2 is inserted through the tape core wire insertion passage 23 of the tape core wire holder 7 with the holding lid 26 opened and the tape core wire insertion passage 11 of the divided tool body 6 with the lid portion 9 opened. The press lid 26 of the tape core holder 7 is closed to hold (fix) the tape core 2, and then the lid 9 of the divided tool body 6 is closed.
In this state, the rotatable member 15 including the two swing arms 17 is placed on the main body base 8 together with the lid main body 13, and is turned to the rotatable member 15 urged by the torsion spring 16 to turn downward. The held coil spring 21 is elastically pressed onto the tape core wire.
When the split tool body 6 is slid to the other end side along the rail 5 in this state, the coil spring 21 is non-existent at the same position in the longitudinal direction of the core of the tape. When coming to the connection region, the individual wire portions 21a arranged in the rail width direction (left and right direction in FIG. 10) at the end portion in the coil diameter direction (lower end portion in FIG. 10) of the helical wire of the coil spring 21 are connected to each other. In the unconnected region where no part exists, the light enters between the adjacent optical fibers 2a. In the case of the four-core tape core wire in the illustrated example, it enters between three optical fibers in the tape width direction.
When the split tool main body 6 is further slid, all the connecting portions 3 between the optical fibers of the tape core wires in the range in which the split tool main body 6 has moved are torn by the wire material (tearing thin piece) 21 a of the coil spring 21. As a result, the tape core wire 2 is split into individual optical fibers 2a in a range that is approximately close to the length of the rail 5.

As described above, the tape core wire passed through the tape core wire insertion passage 11 of the split tool main body 6 is split into a single core by sliding the split tool main body 6 linearly along the rail 5. The core wire 2 is divided into single cores in a straight posture, and it is possible to prevent a bending force that causes optical loss from acting on the optical fiber 2a.
The single core division of the tape core wire is performed by the individual wire rods 21a at the coil diametrical ends of the coil spring 21 entering between adjacent optical fibers and continuing to move linearly along the rail. The direction of the splitting force that performs the splitting action is not the cross-sectional direction of the optical fiber but the longitudinal direction of the optical fiber.
In particular, when a coil spring is used as the dividing member as in the embodiment, the portion of the wire 21a that enters between the optical fibers has a rounded outer surface and a part of a spiral (a slight angle in the longitudinal direction of the core wire). Therefore, it is easy to enter between the optical fibers while moving in the longitudinal direction of the core wire.

With reference to FIGS. 10 and 11, an explanation will be given with reference to FIGS. 10 and 11 that when the divided tool body 6 is slid by a certain distance, the individual wire 21a at the coil diameter direction end of the coil spring 21 always enters between the optical fibers.
FIG. 10A shows the coil spring 21 in the position of the two connecting portions 3 on the left side of the four optical fibers 2a of the tape core wire 2 (for example, the connecting portion 3 indicated by the arrow K in FIG. 2). ) Position. In this state, the wire 2 a of the coil spring 21 is received by the connecting portion 3.
In this state, as schematically shown in FIG. 11, the coil spring 21 is not related to the relative positional relationship in the rail width direction between the wire 21 a of the coil spring 21 and the connecting portion 3 of the two optical fibers 2 a of the tape core 2. 21 is received by the connecting portion 3.
The intermittently fixed tape core wire 2 is a non-connecting region in which connecting portions between adjacent optical fibers are intermittently provided in the longitudinal direction of the tape core wire and no connecting portion exists at the same position in the longitudinal direction of the core wire. Therefore, when the coil spring 21 is slid, the optical fiber 2a of the tape core wire 2 always reaches a position where all the optical fibers 2a are separated as shown in FIG.
At this time, the wire 21a of the coil spring 21 is not prevented from descending and is pushed down by the downward biasing force of the torsion spring 14, and can enter between the optical fibers as shown in FIG.
After that, by further sliding the dividing tool main body 6, as described above, the single core division of the tape core wire is performed.

2 is attached to the rail 5 by hooking it on the frame 31 inside the aerial light closure 30 as schematically shown in FIGS. 13 (a) and 13 (b), for example. For example, at the time of the post-branching operation of the optical cable 32, the tape core wire dividing tool 1 can be hooked on the frame 31 in the closure 30 to perform the single core split operation of the live tape core wire.
Thereby, the workability | operativity of the tape core wire splitting tool 1 of this invention is exhibited more notably.

In the above-described embodiment, the coil spring 21 is used as the split action member. However, the present invention is not limited to this, and in the non-connection region where no connection portion exists at the same position in the longitudinal direction of the core of the tape, What is necessary is just to have provided the thin piece for tearing with a narrow width | variety which can enter between optical fibers at intervals, for example, using a comb-shaped thing is also considered.
Further, in the embodiment, since the tape core wire holder 7 is provided at one end of the rail 5, the tape core wire does not move slowly during the single-core splitting operation, and the force that causes light loss is not generated. However, it is possible to hold the tape core by hand, for example, without providing the tape core holder.
In the embodiment, the dividing member is provided on the lid 9 side, but it may be provided on the main body base 8 side.
Further, in the embodiment, the lid portion 9 is attached to the main body base 8 so as to be openable and closable with a hinge.
The optical fiber constituting the tape core wire targeted by the present invention is not limited to the UV strand having a diameter of 0.25 mm in the embodiment, and various optical fibers generally used for constituting the tape core wire may be used. it can.
The mode of arrangement of the connecting portions between adjacent optical fibers in the target tape core (intermittently fixed tape core) is not limited to the mode as in the embodiment, for example, three at the same position in the longitudinal direction of the core An embodiment in which optical fibers are connected may be used. In short, it suffices if the connecting portions are intermittently provided in the longitudinal direction of the core wire and there is a non-connecting region where at least one connecting portion does not exist at the same position in the longitudinal direction of the core wire of the tape.
In addition, the connecting means for connecting adjacent optical fibers is made of an adhesive in the embodiment, but various connecting means can be adopted.
Also,

1 Tape core dividing tool 2 Tape core (intermittently fixed tape core)
2a optical fiber 3 (between adjacent optical fibers) connecting portion 5 rail 5a guide groove 6 split tool main body 7 tape core wire holder 8 main body base 8a guided convex portion 9 lid portion 10 suspension rod (suspending means)
11, 23 Tape core wire insertion passage 12 Hinge shaft 13 Lid body 13a Hinge shaft hole 14 Hinge shaft 15 Turnable member 16 Torsion spring 17 Swing arm 17a Through hole 18 Shaft 21 Coil spring 21a (End of coil spring in the coil diameter direction Wire part (for tearing piece)
24 Holder base 25 Hinge shaft 26 Holding lid 30 Optical closure 31 Frame d Non-connection region

Claims (7)

A plurality of optical fibers together with coupling part between optical fibers adjacent to each other in the optical fiber ribbon which is connected to the tape-like is kicked intermittently setting the ribbon longitudinally, optical fiber at the same position of the core longitudinal A tape core wire splitting tool for splitting an intermittently fixed tape core wire having a non-connecting region in which no connection portion exists between them into single-core optical fibers,
It consists of a straight rail and a split tool body that is guided by this rail and can slide.
The split tool main body includes a main body base that is guided by a rail and is slidable, and a lid that is detachably attached to the main body base.
Between the main body base and the lid portion, a tape core wire insertion passage for inserting a tape core wire is formed,
The lid or the main body base has a width capable of entering between the adjacent optical fibers in a non-connected region where no optical fiber connecting portion exists at the same position in the longitudinal direction of the tape core wire. A split action member provided with a plurality of narrow tearing thin pieces at intervals , and a downward biasing force applying means for applying a downward biasing force to the split action member,
When the split tool main body is slid along the rail in a state where the downward biasing force is applied to the split action member, the connecting portion between the optical fibers at the same position in the longitudinal direction of the core of the tape core In the non-connecting region where there is no single piece, each of the tearing pieces of the splitting action member enters and slides between adjacent optical fibers, so that the tape core inserted through the tape core insertion passage becomes the splitting action. A tape core wire splitting tool, wherein a single core is split by a tearing piece of a member.   The splitting action member is a spring coil, and each wire part arranged in the rail width direction at the coil diameter direction end part of a spiral wire of the spring coil constitutes a tearing piece. Item 2. The tape core wire dividing tool according to Item 1. The split action member is provided on the lid, and as a downward biasing force applying means for applying a downward biasing force to the split action member, a spring that elastically presses the split action member to the tape core side is provided. The tape core wire dividing tool according to claim 1 or 2.   4. The tape core wire dividing tool according to claim 3, wherein the lid portion is provided on a side portion of the main body base so as to be opened and closed by a hinge provided in parallel with the rail.   The lid includes a lid main body provided on a side of the main body base so as to be opened and closed by a hinge provided in parallel with the rail, and the split action member and is rotated around the lid main body by a hinge parallel to the rail width direction. The tape core wire dividing tool according to claim 4, comprising a rotatable member provided so as to be movable and a spring for elastically urging the rotatable member toward the tape core wire side.   The tape core holder that holds the target optical fiber tape core wire so as not to move in the rail longitudinal direction is provided on one end side of the rail. Tape core dividing tool.   7. A suspension means capable of hooking the rail on a member in a housing in which the optical fiber ribbon to be processed for single-fiber splitting is housed is provided on the rail. The tape core wire dividing tool according to Item.

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