JP2005165362A - Separation method of optical fiber ribbon and separation tool set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a separation method excellent in workability capable of separating a multi-core optical fiber ribbon into an optical fiber in a narrow space or the like.
SOLUTION: An optical fiber ribbon is moved in a longitudinal direction by moving an optical fiber ribbon held in a groove, and a plate-shaped separation tool is inserted into the damaged portion, so that the damaged portion is inserted. Used in the separation method and the separation method capable of reliably separating the incomplete separation part and the lead-out base part of the tape core wire where the scratching tool cannot be used by moving along and in the extending direction thereof. A separation tool set is provided.
[Selection] Figure 1

Description

  The present invention relates to a method for separating an optical fiber tape core consisting of multi-core wires housed in a cable into individual optical fiber core wires, and a separation tool set used for the separation method.

    In recent years, the construction of optical subscriber line networks is progressing rapidly. When drawing an optical fiber into a general house, take out the required optical fiber from the slot type access cable that contains many optical fibers and wire (drop) the optical fiber to the eaves of each house. Connect to the drop cable. FIG. 14A shows an example of a slot type access cable. An optical fiber cable 30 is suspended by a support wire 31 via a connecting member 32. The optical fiber cable 30 is composed of a laminate of an outer sheath (sheath) 33, a cable core 35, and an optical fiber ribbon housed in an SZ slot 34 provided in the core. The optical fiber tape core is a multi-core wire in which a plurality of optical fiber cores are arranged in a plane and covered integrally.

  FIG. 14B shows a cross-sectional view in the A-A ′ line direction shown in FIG. In order to make the drawing easier to understand, the hatching of the cross section is omitted. The support wire 31 is formed by twisting a plurality of single steel wires 39, and a plurality of optical fiber ribbons 36 in which a plurality of optical fiber cores are integrated are accommodated in the plurality of slots 34. (For example, in FIG. 14B, a four-core optical fiber ribbon is laminated in five layers). FIG.14 (c) is sectional drawing which shows an example of the drop cable for drawing down an optical fiber core wire for every door. The drop cable includes a cable main body portion including the optical fiber core wire 42 and the two copper wires 43, and a support wire 41 that supports the cable main body.

  Withdrawing optical fiber to the door-to-door eaves is one unit of one core wire, so it is desirable to take any one optical fiber core from the slot access cable and connect it to the drop cable. For this purpose, it is necessary to divide the optical fiber ribbon 36 accommodated in the slot type access cable into single optical fibers and take out the connected optical fibers.

  In order to take out the optical fiber core for branching from the optical fiber cable 30, the outer cover 33 is peeled off as shown in the figure, and the optical fiber ribbon 36 is taken out from the SZ slot 34 and separated into individual cores. Then, the separated core wire is cut and connected to the drop cable.

As a separation tool for separating a multi-fiber optical fiber ribbon, a separation tool (Patent No. 2768783, Japanese Patent Laid-Open No. 7-113915) in which a wound blade and a shearing piece are embedded in two substrates is known. .
JP 7-1113915 A

  However, in such a conventional separating tool, since the core wire is taken out at the middle portion of the cable and branched, it is difficult to take out the optical fiber tape core wire from the cable from which the sheath has been removed and separate it into a single core wire. It is. In other words, work must be performed by pulling a part of a cable containing a large number of tape cores without cutting a single tape core. During work, the tip of the separation tool interferes with other optical fiber tape cores and cable members, resulting in poor workability and difficulty in separating the end (root) of the cable sheath removal part. Met.

  In addition, when a compact separation tool having only a dividing blade in the groove-like portion that accommodates the tape core wire is used, there is no shearing piece, so that a portion that is not completely separated only by a scratch on the tape core wire is generated. There was a fear. In particular, there is a problem that such a state is likely to occur in work in a narrow work space such as separation work in a closure.

  The present invention has been made in view of the problems of the prior art, and has an excellent workability and can be reliably separated into an optical fiber core at an intermediate portion of the optical fiber tape. An object of the present invention is to provide a line separation method and a separation tool set used in the method.

    In the present invention, the optical fiber ribbon is moved in the longitudinal direction by moving the optical fiber ribbon held in the groove portion, and a plate-shaped separation tool is inserted into the damaged portion to insert into the damaged portion. Provided is a separation method and a separation tool set capable of reliably separating even an incomplete separation portion and a lead base portion of a tape core wire where a wound tool cannot be used by moving along or in the extension direction thereof. The above-mentioned subject is achieved.

  An optical fiber ribbon separation method according to a first aspect of the present invention provides an optical fiber ribbon comprising a plurality of optical fibers arranged in a plane and integrally covered with an optical fiber cable. A method of separating an optical fiber ribbon into a single optical fiber, and (a) sliding part of the optical fiber ribbon in the longitudinal direction while restricting the movement in the left and right and up and down directions And (b) moving the optical fiber ribbon in the longitudinal direction while restricting movement in the left and right and up and down directions, thereby dividing the optical fiber tape core by the dividing blade. A step of scratching in the longitudinal direction; and (c) inserting a plate-like separation tool into the wound portion of the optical fiber ribbon, and moving the inserted separation tool in the longitudinal direction of the optical fiber ribbon. , Light fa Characterized in that it comprises a step of separating the Batepu cord.

  According to this aspect, it is possible to completely separate a portion that could not be completely separated by the scratching step and a portion that cannot be scratched by the scratching step by the separation tool.

  In the optical fiber ribbon separation method according to another aspect of the present invention, the separation tool used in the separation step (c) is a plate having a thickness k in the range of 0.04 mm <k <0.3 mm. It is characterized by including the member. If the thickness of the separation tool is thin, there is a risk of scraping by the optical fiber core separation tool. If the thickness of the separation tool is thick, a large force may be applied during the separation operation to damage the optical fiber core wire. . With the separation tool of the thickness of this embodiment, it is possible to avoid these dangers.

  According to another aspect of the present invention, there is provided an optical fiber ribbon separation tool set that includes a plurality of optical fiber cores arranged in a plane and coated with a coating material so as to integrally illuminate an optical fiber tape. A separation tool set for separating a part of a continuous optical fiber ribbon from a fiber cable into a single optical fiber, and (a) a single optical fiber core of the optical fiber ribbon. It is equipped with a scratching tool that scratches the position to be separated in the longitudinal direction of the optical fiber ribbon, and (b) a plate-like part that is inserted into the wounded part that is scratched by the scratching tool. And a separation tool for separating the optical fiber tape core wire into a single optical fiber core wire by moving the plate-like portion in the longitudinal direction of the tape core wire.

  The optical fiber tape core wire separating tool set according to another aspect of the present invention is characterized in that the plate-like portion of the separating tool has a thickness k in the range of 0.04 mm <k <0.3 mm. If the thickness of the separation tool is thin, there is a risk of scraping by the optical fiber core separation tool. If the thickness of the separation tool is thick, a large force may be applied during the separation operation to damage the optical fiber core wire. . With the separation tool of the thickness of this embodiment, it is possible to avoid these dangers.

  The optical fiber ribbon cord separating tool set according to another aspect of the present invention is characterized in that the separating tool is attached to the scratching tool. According to this aspect, the wound tool and the separation tool can be made into one tool, and the number of portable tools at the time of work can be reduced, and the loss of the separation tool can be prevented.

  An optical fiber ribbon separation tool set according to another aspect of the present invention is characterized in that a wound tool and a separation tool are integrally formed.

  As described above, according to the present invention, by using a combination of a wound tool and a separation tool, even when the optical fiber ribbon is separated over a long distance, a further wound tool is provided. Even in a narrow space that cannot be used, the tape core can be separated into single cores. Further, by setting the thickness of the plate-like insertion portion of the separation tool within the predetermined range described above, more reliable separation work can be performed while suppressing loss of the optical fiber core wire. In particular, by setting the thickness k of the plate-like member to 0.06 mm <k <0.2 mm, it is possible to obtain an excellent effect that an increase in loss accompanying the separation work can be suppressed to 1 dB or less.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an image perspective view showing the concept of the separation method of the present invention. First, the tape core wire 36 is scratched using a scratching tool to form the scratched portions 17 to 19. Although not shown in FIG. 1, an injured portion is formed at a position corresponding to the injured portions 17 to 19 on the back surface of the tape core wire. Next, the separation tool 6 for separating the tape core wire is inserted into the wound portion 17 of the tape core wire 36, and the inserted separation tool 6 is moved in the longitudinal direction of the tape core wire. Thereby, the optical fiber core wire is separated from the tape core wire. Also, if the tape core is pulled out of the cable and separated, each part of the cable may get in the way, and the wound tool may not be moved to the base of the pulled tape core. In some cases, it cannot be injured. In such a case, the separation tool 6 is moved to the extended portion beyond the wounded portion, so that the tape is completely separated to the base of the tape core wire. Thereby, the part which cannot use a wound tool is also separable.

  FIG. 2 is a perspective view of a separation tool set according to an embodiment of the present invention for separating an optical fiber tape core wire into a single core wire. (A) is a perspective view which shows the external appearance of an example of the wound tool which injures an optical fiber tape core wire, (b) expands and shows the front-end | tip part of the 2nd member 2 containing the groove-shaped part 7. It is an expansion partial perspective view. (C) is a perspective view which shows an example of the separation tool which isolate | separates the damaged optical fiber tape core wire into a single core wire. The wound tool of FIG. 2A has a configuration in which a first member 1 and a second member 2 are crossed and fixed so as to be rotatable by a shaft 3 at a substantially central portion. A groove 7 is provided at the tip of the second member 2, and the upper opening of the groove 7 is closed by the first member when the first member and the second member are engaged with each other. The optical five tape core wire is held in the groove-like portion 7.

  When separating an optical fiber ribbon (hereinafter, appropriately abbreviated as “tape ribbon”) into a single strand, the tape strand is accommodated in the groove 7 provided in the second member 2. It is sandwiched between the first member 1 and the second member 2 and holds the tape core wire so as to be slidable in the longitudinal direction. A first grip 10 and a second grip 20 are provided at the other ends of the first member 1 and the second member 2. When the gripping portions 10 and 20 are rotated and closed in a direction close to each other, the other end portion provided with the groove upper portion 7 is closed, and a part of the tape core wire is slidably held in the groove-like portion 7.

  When the tape core is separated into a single optical fiber core, the wound tool or the tape core is slid in the longitudinal direction while the tape core is housed and held in the groove 7. Move. As shown in FIG. 2B, the groove-like portion 7 has a width w + α that is slightly larger than the width w of the tape core wire. Since the groove-like portion 7 allows the tape core wire to slide in the longitudinal direction while restricting the left and right and up-and-down movements of the tape core wire, it is preferable that the groove-like portion 7 has a shape that matches the shape of the tape core wire. Since the tape core and the wound tool only need to move relative to each other, the sliding operation may be performed by fixing the wound tool and moving the tape core or fixing the tape core and scratching. The tool may be moved. In this embodiment, a structure in which the groove-like portion 7 is provided in a direction substantially perpendicular to the longitudinal direction of the second member 2 is shown as an example. However, from the viewpoint of operability for sliding the tape core wire, it may be configured to be arranged obliquely as shown by the broken line 8 in FIG. With such a configuration, it is easy to slide the tape core wire while the wound tool is in close contact with the body, and further stable separation operation is possible.

  Inside the groove-like portion 7, there is provided a dividing blade for scratching and separating the film of the tape core wire when the tape core wire is sandwiched and slid. In the present embodiment, a configuration is shown in which three split blades 11 to 13 are provided to split a tape core wire obtained by integrating four optical fiber core wires into four single core wires. The widthwise positions of the split blades 11 to 13 are arranged one by one at an intermediate position between adjacent optical fiber cores constituting the tape core wire, and each of the split blades 11 to 13 extends in the longitudinal direction of the optical fiber tape core wire. They are arranged with a predetermined interval.

The dividing blade is preferably provided so as to oppose both the first member 1 and the second member 2 sandwiching the tape core wire in order to divide the tape core wire uniformly and smoothly from above and below. It is also possible to adopt a configuration in which the scratching blade 3 is provided on one side. Further, the three divided blades 11 to 3 are arranged with their lateral positions shifted, and are fixed by set screws 4. In the present embodiment, a needle-shaped scratching blade is shown as the split blade, but it is not limited to a needle shape, and a plate-shaped scratching blade with a certain length may be used, and the number of the target optical fiber tapes It can be set according to the number of cores and the manner of division.
Further, in this embodiment, the groove-like portion 7 is provided only on the second member. However, the groove-like portion 7 may be provided on the first member. You may provide in both of these members.

  In the present embodiment, the first member 1 and the second member 2 have a substantially square configuration. Such a square shape is not necessarily required, but such a square shape has an advantage that it is difficult to rotate when held by hand. The first member 1 and its gripping portion 10, the second member 2 and its gripping portion 20 constitute a lever-like member having a rotating shaft 3 at the intermediate portion so that it can be handled easily by hand. With this configuration, the tape core wire can be sandwiched and held with a small force.

  As illustrated in FIG. 2B, the second member 2 is provided with an alignment pin 23, a guide pin 21, and a guide pin 22. The alignment pin 23 is a pin for properly fitting the first member 1 and the second member 2, and the first member is provided with a pin hole (not shown) at a corresponding position. The guide pins 21 and 22 are guide pins for ensuring that the optical fiber tape core wire is properly inserted into the groove-like portion 7. A pin hole (not shown) is provided at a corresponding position of the first member 1. Is provided. Since the wound tool is used manually on site, it is dimensioned so that it can be easily held by hand, and preferably has a total length of about 150 mm.

  The optical fiber tape core wire is scratched by manually or mechanically pulling the optical fiber tape core wire in the direction indicated by the arrow 5 in a state of being sandwiched by the scratching tool, for example, a 4-fiber optical fiber tape. Separate the cores into 4 single cores. Instead of pulling out the optical fiber ribbon, it is possible to fix the optical fiber ribbon and separate it into single fibers by moving the tool. In this example, a 4-core optical fiber ribbon is shown, but it is possible to separate various types of ribbons, such as a 2-core to 32-core tape. It is also possible to divide the 4-core, 8-core, 16-core, 32-core, etc. for every two-core. It is necessary to change the width of the groove-like portion and the number of split blades according to the number of cores in accordance with the number of cores integrated with the tape core.

  It is desirable that the tape core wire is separated from the single optical fiber core wire only by a sliding operation with a scratching tool. However, the wound tool only provided with the dividing blade at the sliding position of the tape core wire as shown in (a) has the advantage that it can be miniaturized with a simple structure, but has no shearing piece, so it is long. When the distance is separated, there is a possibility that a portion that is not separated just by scratching the tape core wire may occur. However, it is not always necessary to be able to completely separate, and it is only necessary that the damaged tape core wire can be easily separated thereafter.

  FIG.2 (c) is a perspective view which shows the separation tool 6 for isolate | separating the part which is not completely isolate | separated of the wound tape core wire. The separation tool 6 is inserted into a part of the damaged portion of the tape core, and moved in the longitudinal direction to completely separate the optical fiber ribbon along the damaged portion. Furthermore, since the parts of the cable interfere with each other and the movement of the scratching tool is limited, the scratching tool cannot be used, and the necessary part may not be separated. In such a case, the inserted separation tool can be further extended from the scratched portion and slid in the longitudinal direction to be separated to a required position. In addition, in order to make it easy to insert the separation tool into the damaged portion of the tape core wire, the tip of the separation tool 6 can be formed to have a slightly rounded acute shape as shown by the broken line 9.

  FIG. 3 is a front view illustrating a state in which the wound tool illustrated in FIG. 2A is sandwiched, and FIG. 4 is a diagram illustrating a part of a cross section in the B-B ′ line direction illustrated in FIG. 3. The split blades 11 to 13 provided on the second member 2 protrude from the bottom to the groove-like portion 7 and the split blades 14 to 16 provided on the first member 1 protrude from the top to the bottom. . Moreover, the state in which the divided blades 11 and 14 are fixed by the screws 4 is shown. FIG. 5 shows a state where the optical fiber core wire 36 is separated into a single wire by being slid in the direction of the arrow while being sandwiched. When separating the tape core 36, as shown in FIG. 5, the tape core 36 is sandwiched by a scratching tool so that the tape core 36 passes through the groove 7 while being held. Alternatively, the separation tool 2 is moved. Thereby, the upper and lower surfaces of the tape core wire 36 are injured, and the injured portions 17, 18, 19 and the like corresponding to the divided blades are formed.

  Next, arrangement | positioning of the division blades 11-13 is demonstrated using FIG. FIG. 6 is a view for explaining the arrangement of the dividing blades of the groove portion 7 according to the embodiment of the present invention, and is a plan view of the groove portion 7 as viewed from the opening. The tape core wire 36 is indicated by a broken line. The dividing blades 11 to 13 are arranged at intervals b1 to b4 that divide the optical fiber core wires into single cores in the width direction of the tape core wires 36, and are predetermined in the sliding direction (longitudinal direction of the tape core wires). Are arranged at intervals a1 and a2. b1 to b4 are determined by the diameter of the optical fiber core wire and the like. The longitudinal distances a1 and a2 may be the same distance or different, and are determined in consideration of stress applied during the sliding operation when the tape is divided, sliding friction, and the like.

  The reason why the split blades are arranged with a1 and a2 in the longitudinal direction is that when a1 = 0 and a2 = 0, a plurality of split blades are inserted at the same position in the width direction of the tape core wire. This is because friction at the time of scratches increases. If the frictional force during insertion is large, a large force is required for the dividing operation, and depending on how the tool is moved delicately, a large force is applied to the tape core. The force causes a bend in the tape core and increases the risk of loss. The inventors of the present invention have made various trials and have concluded that it is preferable that the interval between the divided blades be 1.5 mm or more. By this interval, the frictional force at the time of division is reduced, and no loss that causes a problem in the single-core separation work in the closure does not occur, and single-core separation can be performed safely and reliably.

  7 is a cross-sectional view taken along the line C-C ′ shown in FIG. 4. The tape core wire 36 accommodated in the groove portion 7 is indicated by a broken line. “T” represents the thickness of the tape core, “c1” represents the insertion depth of the divided blades 14 to 16 protruding from the first member 1 into the upper surface of the tape core 36, and “c2” represents the second The insertion depth to the lower surface of the tape core wire 36 of the divided blades 11 to 13 protruding from the member 2 is shown.

  Next, the insertion depth of the split blade into the tape core wire will be described. Since the tape core wire is divided using the dividing blade provided in the wound tool of the present invention, the setting of the insertion amount (depth) of the dividing blade is important. When the insertion amount of the dividing blade is made larger than the thickness t of the tape core wire, the tape core wire can be completely divided. If the dividing blade is provided on one of the upper surface side or the lower surface side of the tape core wire, the amount of insertion of the dividing blade can be easily made greater than the thickness t. However, if the split blade is provided only on one side and the amount of insertion is set to a depth greater than or equal to the thickness t, a large force is required to slide the tape core, which may damage the optical fiber core, There is a risk of slipping. Therefore, although it is possible to provide the dividing blade on one of the upper surface side or the lower surface side of the tape core wire, from the viewpoint of dividing the tape core wire accurately and without damaging, the upper surface side of the tape core wire and It is preferable to provide on both sides of the lower surface and scratch the tape core from both sides.

  When the split blades are provided above and below in this manner, it is possible to completely separate the split blades if the total insertion amount of the split blades is greater than the thickness of the tape core wire. However, since the upper and lower split blades interfere with each other when the insertion amount is large, in order to make the total insertion depth of both split blades more than the thickness “t”, it is necessary to devise such as shifting the upper and lower blades back and forth. Become. On the other hand, if the insertion depth is too shallow, the tape core cannot be separated. However, it is also difficult to accurately set the total insertion depth of the upper and lower divided blades to the thickness “t”.

  The inventors of the invention according to the present application have made various trials, and when 0.09 ≦ d / t ≦ 0.5, the separability is good, and good and stable separation without damage is possible. I got a conclusion. “T” represents the thickness of the tape core wire, and “d” represents the insertion depth. In addition, a relationship is shown in the case where split blades are provided on both the upper and lower sides and the insertion depth of the upper and lower split blades is the same. When changing the length of the upper and lower divided blades, the total amount of insertion of both divided blades is preferably in the range of 0.18 ≦ d / t ≦ 1.0. In reality, it may be difficult to accurately add the total depth of insertion to the thickness “t”. There may be a portion that is not completely separated.

  FIG. 8 shows images of the damaged portions 17 to 19 and 27 to 29 generated on the upper surface and the lower surface of the tape core wire 36 by moving the wound tool in the longitudinal direction of the tape core wire. In FIG. 8, the end face of the tape core wire 36 is shown so that the scratched portions 27 to 29 on the lower surface can be seen. However, in practice, the middle portion of the continuous tape core wire is scratched to obtain a single-core light. The fiber core wire 25 can be separated. Each of the divided blades 11 to 13 and 14 to 16 is provided at a predetermined interval in the longitudinal direction of the tape core wire. Therefore, the cutting end position by each divided blade is a position that is obliquely shifted at a predetermined angle with respect to the width direction of the tape core wire. Further, when the insertion depth (up and down) of the set of the divided blades 11-14, 12-15, and 13-16 is equal to or less than the thickness “t”, as shown in FIG. , It may not be completely separated.

  Table 1 shows that after a 100 mm length was injured with an injured tool, a separating tool 6 having a different thickness was inserted into the injured part, and the separating tool 6 was further moved in the extending direction of the injured part by 400 mm. It is an experimental result which shows the loss fluctuation | variation about the optical fiber core wire obtained by isolate | separating a tape core wire over 500 mm in total length. The material of the separation tool 6 to be used is JIS G 4401 carbon tool steel, and dimensions other than the thickness are 75 mm × 12.5 mm plate members. FIG. 9 shows the order in which the separation tool 6 is inserted and separated in this experiment. First, as shown in (a), the separation tool 6 is inserted into the wound portions 18 and 28 (arrow (1)) in the central portion and separated into two from the center, and then the arrow ( It separated from the wound part 19 and 29 of 2), and finally separated from the arrow (3) shown in (c).

  As can be seen from Table 1, when the thickness of the plate member constituting the insertion portion of the separation tool 6 is 0.04 mm or less, the loss variation is small, but the single-core colored layer is shaved, and the light There is a risk of damaging the fiber core. On the other hand, when the thickness is 0.30 mm or more, it is too thick and requires a strong force for separation, so that a large loss (3.7 dB) is given to the optical fiber. From the above results, the thickness of the insertion portion of the separation tool 6 is preferably larger than 0.04 mm and thinner than 0.30 mm. In particular, by setting the thickness in the range of 0.06 mm to 0.20 mm, it is possible to separate single core wires with an increase in loss of 1 dB or less.

  FIG. 11 shows a separation tool provided with groove-like portions 50 and 51 divided into a first member 1 and a second member 2 as another embodiment of the present invention. FIG. 12 is a perspective view showing still another embodiment of the present invention, and has a plurality of groove-like portions 52 to 54. The groove-like portions 52 to 54 are provided according to the type of the tape core wire composed of multi-core wires. In FIG. 12, a groove-shaped portion for separating a tape core wire having a large number of core wires is provided from the outside to the inside. However, on the contrary, the outer groove-like portion 52 can be a groove-like portion for a tape core wire having a large number of core wires. FIG. 13 is a view showing still another embodiment of the separation tool according to the present invention. In this embodiment, unlike the example of FIG. 2, there is no handle portion, and the first member 1 and the second member 2 are connected to each other by the rotating shaft 3 at their respective end portions. The optical fiber core wire is separated by pressing the first member 2 and the second member 2. The members of the tool are shown in a simplified manner, and there is no mechanical change from the embodiment of FIG.

It is an image perspective view which shows the concept of the separation method of this invention. It is a perspective view of the separation tool set concerning one example of the present invention which separates an optical fiber tape core wire into a single core wire, (a) is a perspective view of a wound tool, and (b) is an expansion perspective view of a slot part. FIG. 4C is a perspective view of the separation tool. It is the figure seen from the left direction of FIG. 2 which shows the state which pinched | interposed the wound tool. It is an expansion partial perspective view which shows the front-end | tip part and the groove-shaped part 7 of the 2nd member 2 concerning this invention. FIG. 4 is a cross-sectional view showing a part of a cross section in the B-B ′ line direction shown in FIG. It is a perspective view which shows the state isolate | separated into the single line | wire of an optical fiber core wire, when a tape core wire is clamped and is slid to the arrow direction. It is a figure for demonstrating the position of the division blade of the groove-shaped part concerning one Embodiment of this invention, and is the top view which looked at the groove-shaped part from the opening part direction. It is a perspective view which shows the image of the damage part which arises on the upper surface and lower surface of the tape core wire 36 by moving a wound tool to the longitudinal direction of a tape core wire. It is sectional drawing of the C-C 'line direction shown in FIG. It is a conceptual diagram at the time of isolate | separating completely the tape core wire after an injury using a separation tool. In the data collection of Table 1, the order in which the tape cores are separated is shown. It is a perspective view which shows the state which attached the separation tool to the wound tool. It is a perspective view which shows the separation tool concerning the other Example of this invention which provided the groove-shaped parts 50 and 51 divided | segmented into the 1st member 1 and the 2nd member 2. FIG. It is a perspective view which shows other embodiment of this invention. It is a perspective view which shows other embodiment of the separation tool which concerns on this invention. (A) is a figure which shows an example of a slot type access cable, (b) is sectional drawing of the AA 'line direction shown to (a), (c) is for pulling down an optical fiber core wire for every door It is sectional drawing which shows an example of a drop cable.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st member 2 2nd member 3 Rotating shaft 4 Set screw of a division blade 6 Separation tool 7, 8 Groove-like part 10, 20 Gripping part 11-16 Division blade 17-19, 27-29 Cutting 21,22 Groove Guide pin for properly inserting the optical fiber core into the cable 23 Pin for properly positioning the upper member and the lower member 30 Optical fiber cable 35 Core of the optical fiber cable 36 Optical fiber tape core 37 Optical fiber core

Claims (6)

A plurality of optical fiber cores are arranged in a plane, and an optical fiber tape core wire composed of a multi-core wire integrally covered is taken out from the optical fiber cable, and the optical fiber tape core wire is separated into a single optical fiber core wire. A method,
(A) a step of holding a part of the optical fiber ribbon so as to be slidable in the longitudinal direction while restricting movement in the left and right and up and down directions;
(B) The division position of the optical fiber ribbon is damaged in the longitudinal direction by the dividing blade by relatively moving the optical fiber ribbon in the longitudinal direction while restricting the left and right and vertical movements. Process,
(C) A plate-shaped separation tool is inserted into the damaged portion of the optical fiber ribbon, and the inserted separation tool is moved in the longitudinal direction of the optical fiber ribbon, thereby the optical fiber ribbon. Separating the
An optical fiber ribbon separation method comprising: The light according to claim 1, wherein the separation tool used in the separation step (c) includes a plate-like member having a thickness k in a range of 0.04 mm <k <0.3 mm. Separation method of fiber ribbon. A plurality of optical fiber cores are arranged in a plane, and an optical fiber tape core consisting of multi-core wires integrally covered with a covering material is taken out from the optical fiber cable, and a part of the continuous optical fiber tape core is a single core. A separating tool set for separating the optical fiber core wire of
(A) a scratching tool for scratching a position of the optical fiber ribbon in the longitudinal direction of the optical fiber ribbon, the position where the single fiber of the optical fiber ribbon is separated;
(B) A plate-like portion that is inserted into an injured portion that has been injured by the injuring tool, and the light is obtained by moving the plate-like portion inserted into the injured portion in the longitudinal direction of the tape core wire. A separation tool for separating the fiber tape core wire into a single optical fiber core wire;
A separation tool set comprising: The separation tool set according to claim 3, wherein the plate-like portion of the separation tool has a thickness k in a range of 0.04 mm <k <0.3 mm. The separation tool set according to claim 3, wherein the separation tool is attached to the wound tool. The separation tool set according to any one of claims 3 and 4, wherein the wound tool and the separation tool are integrally formed.

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