JP4948013B2 - Optical fiber stripping part and optical fiber stripping method - Google Patents

Description

  The present invention relates to an optical fiber stripping part and an optical fiber stripping method, and in particular, an optical fiber stripping method in which an optical fiber can be cut by a simple operation to obtain a cleavage plane, and the coating of the optical fiber can be removed. The present invention relates to a component and an optical fiber peeling method.

There are two types of optical fiber cutters: high performance type and simple type. The simple type has a structure in which an optical fiber is placed on a bending plate, the end is clamped to scratch the cutting position, and the optical fiber is bent along with the bending plate to cleave the operator. However, it is widely used because it is inexpensive.
In order to connect an optical fiber with a low connection loss, it is necessary to cut at a good cut end (cutting angle, cross-sectional roughness, etc.) of the optical fiber regardless of mechanical splices connected by fusion, connectors, or the like. Therefore, a high-performance type that can obtain a good cutting end regardless of the skill of the operator has been mainstream.

  With the spread of FTTH (Fiber To The Home), which lays optical fiber to each customer, a simple type that can be handy on the utility pole or on the customer has appeared in the fusion machine, but the optical fiber cutter is fused. The required level of connection loss at the time of connection and mechanical splicing has increased, and high-performance types were mainly used. The high-performance type can obtain a good cut end portion of the optical fiber regardless of the skill of the operator, and is disclosed in, for example, Japanese Patent Application Laid-Open No. 1-112206 or Japanese Patent Application Laid-Open No. 1-126601.

  In recent years, optical fiber laying work for each consumer has been increasing, and a large number of optical fiber cutters are required for many laying work locations. However, since the high-performance type is very expensive, if a large number of high-performance type optical fiber cutters are arranged at each laying site, the cost becomes very large. Therefore, it has been demanded that a good optical fiber cutting end can be obtained regardless of the skill of the operator even with a simple optical fiber cutter that is less expensive than the high-performance type.

  For example, in providing a connection portion such as an optical connector at the end of an optical fiber housed in a closure disposed in the vicinity of a utility pole, when cutting an optical fiber, a conventional tool provided with a metal blade ( Cutter) was used.

  This tool first scratches an optical fiber in a direction perpendicular to the longitudinal axis of the optical fiber, and then cleaves and cuts the optical fiber. I couldn't cut it.

  Japanese Laid-Open Patent Publication No. 62-231203 discloses a conventional simple optical fiber cutter. FIG. 13 is a perspective view showing a conventional optical fiber cutter. Although not shown, the optical fiber core wire is disposed along the longitudinal direction of the optical fiber cutter. The conventional optical fiber cutter includes a clamp lever 114 that is pivotally supported by a bracket 112a of a support plate 112 and holds an optical fiber (not shown), a bite arm 146 that is pivotally supported by the bracket 112a and has a bite block 116 attached thereto, and the support plate 112. And a tensile bending stress applying means 120 attached to the. With this optical fiber cutter, the optical fiber core is cut as follows.

The optical fiber whose portion to be cut is exposed by peeling is engaged with the engaging groove 152 of the optical fiber receiving member 136, the clamp lever 114 is lifted against the spring 126, and the core wire is lifted by the rubber plate of the clamp lever 114. 124 and the rubber plate 122 of the support plate 112. Next, the bite arm 146 is pushed down against the spring 128 to press the bite (blade) in the bite block 116 onto the rubber layer 142 through the core wire. As a result, a notch is provided in the core wire, and then the fiber receiving member 136 together with the optical fiber is pivoted downward about the support shaft 132 against the spring 138. Accordingly, the core wire is bent with the roller 140 as a fulcrum, and a tensile stress is applied to cut the core wire.
JP 62-231203 A Japanese Patent Laid-Open No. 1-112206 JP-A-1-126601

  As described above, the construction of laying optical fibers has increased, and it has become necessary to obtain a good optical fiber cutting end even for simple optical fiber cutters, regardless of operator skill. It was. Along with this, in the conventional simple type optical fiber cutting device, a metal blade and a diamond blade for scratching the optical fiber were attached. However, when these metal blades are used, the optical fiber is excessively scratched. In addition, there is a problem that it is not suitable for use or that it is difficult to work at the time of operation in the dark.

  In addition, the optical fiber coating cannot be easily removed simultaneously with the cutting of the optical fiber.

  Accordingly, an object of the present invention is to provide an optical fiber that can be stably operated, can obtain a good cut end of an optical fiber regardless of operator's skill, and can remove the coating of the optical fiber. An object of the present invention is to provide a peeling component and an optical fiber peeling method.

  The present inventor has intensively studied to solve the above-mentioned problems of the prior art. As a result, when a blade made of synthetic resin is used instead of a metal or diamond blade, when the blade is pressed against the optical fiber, the blade itself is deformed, and a predetermined scratch is formed on the cladding surface portion of the optical fiber. If this optical fiber is bent to the side opposite to the scratch, the cut surface is in good condition and can be connected with a predetermined connection loss when connecting. Therefore, it depends on the skill of the operator. It was found that the optical fiber can be cut easily and stably.

  Further, separately from the optical fiber cutting blade, each of the first member and the second member is provided to face each other with a predetermined gap so as to sandwich the coated optical fiber accommodated in the groove. When the second member is brought into contact with each other, each pair of coating removal blades arranged correspondingly is also formed of a resin material, and the coating removal blades are arranged at a predetermined interval from the optical fiber cutting blade. Then, in conjunction with the above-described operation of the optical fiber cutting blade, a part of the coating of the coated optical fiber is cut by the coating removing blade, and the damaged part is bent to the opposite side by the optical fiber cutting blade. It was found that the optical fiber was cut and the coating was removed.

The present invention has been made on the basis of the above research results. The first aspect of the optical fiber peel-off component according to the present invention includes a groove that can accommodate a coated optical fiber extending in the longitudinal direction, and an inner portion of the groove. An optical fiber cutting blade provided integrally with the optical fiber, and an optical fiber cutting blade provided integrally with the optical fiber cutting blade in the groove portion with a predetermined interval in a direction perpendicular to the longitudinal direction. A pair of coating removal blades, a first member made of a resin material having a refractive part in the middle part, and
A pair of coating removal of the first member integrally provided in the groove portion and the groove portion corresponding to the groove portion of the first member, which is disposed facing the first member and can accommodate the coated fiber. A pair of coating removal blades arranged opposite to each other at a predetermined interval in a direction perpendicular to the longitudinal direction corresponding to the blades;
An optical fiber peeled component comprising a second member made of a resin material provided with a refracting portion corresponding to the refracting portion of the first member at an intermediate portion.

  According to a second aspect of the optical fiber stripped part of the present invention, the pair of coating removal blades of the first member has a tapered portion at an end thereof, and the pair of coatings of the second member. The removing blade is an optical fiber peeled component, wherein a taper portion is provided at an end corresponding to the taper portion of the first member.

  According to a third aspect of the optical fiber peel-off component of the present invention, each of the refractive portions of the intermediate portion is formed of a connecting portion having a small thickness, and the connecting portion allows one member of the first member and the other of the first member. The member and the one member of the second member and the other member are connected to each other, and the optical fiber peeled component is provided.

  According to a fourth aspect of the optical fiber peeled part of the present invention, the optical fiber peeled part is characterized in that the connecting portion has a thickness in the range of 0.4 to 2.0 mm.

  According to a fifth aspect of the optical fiber peel-away component of the present invention, when the first member and the second member are arranged to face each other, the optical fiber in each one member of the first member and the second member An optical fiber peeling component comprising a predetermined space between a cutting blade and the coating removing blade.

  According to a sixth aspect of the optical fiber peeling component of the present invention, the space portion is an optical fiber peeling component formed across the first member and the second member.

  A seventh aspect of the optical fiber peeling component according to the present invention is an optical fiber peeling component in which the space is formed only in the second member.

According to an eighth aspect of the optical fiber peeling component of the present invention, the space formed in the second member is gradually deepened from the optical fiber cutting blade toward the coating removal blade. This is an optical fiber peeled part having such an inclined tapered portion.

According to a ninth aspect of the optical fiber peel-away component of the present invention, the space formed in the first member gradually becomes shallower from the optical fiber cutting blade toward the coating removal blade. This is an optical fiber peeled part having such an inclined tapered portion.

According to a tenth aspect of the optical fiber peeling component of the present invention, when the opposing surfaces of the first member and the second member are brought into contact with each other, the optical fiber cutting blade is deformed by the blade itself. Until it is pressed against the optical fiber housed in the groove and scratches the optical fiber, and the distance between each pair of coating removal blades of the first member and the second member is An optical fiber peeled part characterized by substantially matching a diameter of an optical fiber core wire of a coated optical fiber .

  According to an eleventh aspect of the optical fiber stripped part of the present invention, the resin material is made of an epoxy-based or PPS (polyphenylene sulfide) -based synthetic resin and contains 60% or more of a glass filler. It is an optical fiber stripped part.

  According to a twelfth aspect of the optical fiber peeling component of the present invention, each of the groove portions has a flat bottom surface and both side surfaces inclined from the bottom surface, and the optical fiber cutting blade is located in the groove portion. The optical fiber peeled part is characterized in that the top part of the blade is formed substantially coincident with the surface of the first member.

  According to a thirteenth aspect of the optical fiber peeling component of the present invention, each of the groove portions includes a flat bottom surface and both side surfaces inclined from the bottom surface, and the optical fiber cutting blade is located in the groove portion. The optical fiber peeled part is characterized in that the top of the blade is formed to protrude into the groove of the second member.

  A fourteenth aspect of the optical fiber peel-off component according to the present invention is an optical fiber peel-off component characterized in that the distance between each pair of the coating removal blades is in the range of 0.128 to 0.140 mm. is there.

  According to a fifteenth aspect of the optical fiber peeling component of the present invention, the angle of the tip of the optical fiber cutting blade and the coating removal blade is in the range of 10 to 45 degrees. It is a part.

  According to a sixteenth aspect of the optical fiber peeling component of the present invention, one member of the second member is provided with a tapered portion on the opposite surface side facing the other member. It is a folded part.

  According to a seventeenth aspect of the optical fiber peeling component of the present invention, the optical fiber cutting blade and / or the coating removal blade are not provided in the groove portions of the respective portions of the first member and the second member. An optical fiber peeling component comprising a protrusion for holding a coated optical fiber at at least one corresponding portion.

  An eighteenth aspect of the optical fiber peel-away part according to the present invention is an optical fiber peel-off part characterized in that the height of the protrusion is in the range of 0.01 to 0.05 mm.

According to a nineteenth aspect of the optical fiber peeling component of the present invention, a stage is provided at a portion facing the optical fiber cutting blade in the groove portion of the second member. It is a folded part.

According to a first aspect of the optical fiber peeling method of the present invention, there is provided a groove that can accommodate a coated optical fiber extending in the longitudinal direction, an optical fiber cutting blade integrally formed in the groove, and the optical fiber cutting. A resin material provided with a pair of coating removal blades which are integrally provided in the groove portion with a gap from the blade and are arranged to face each other at a predetermined interval in a direction perpendicular to the longitudinal direction, and a refracting portion in the middle portion Corresponding to a first member comprising: a groove portion capable of accommodating a coated fiber and corresponding to the groove portion of the first member; and a pair of coating removing blades of the first member integrally provided in the groove portion. A second material made of a resin material having a pair of coating removal blades arranged to face each other at a predetermined interval in a direction perpendicular to the longitudinal direction, and a refractive part corresponding to the refractive part of the first member at the intermediate part. Arrange the members facing each other,
A coated optical fiber is accommodated in the groove,
In the central portion , the first member and the second member are pressed with a predetermined force, the optical fiber cutting blade is pressed against the optical fiber until the blade itself is deformed, and the optical fiber is damaged.
In the refracting portion, a tension is applied to the portion of the optical fiber damaged by the optical fiber cutting blade, bent to the opposite side to the scratch, and the optical fiber is cut. An optical fiber peeling method, wherein the coating of the optical fiber is removed by the coating removal blade.

  According to the optical fiber peeled part of the present invention, the coating of the coated optical fiber can be more reliably removed over a predetermined length, and the optical fiber can be cut. When the optical fiber is cut using the optical fiber peeled component of the present invention, an optical connector is assembled, and a refractive index matching agent is applied and connected to the connection end face, so that a connection loss of 1.0 dB or less can be realized. did it.

  The optical fiber peeling component and the optical fiber peeling method of the present invention will be described with reference to the drawings.

One aspect of the optical fiber peeling component of the present invention includes a groove portion that can accommodate a coated optical fiber extending in the longitudinal direction, an optical fiber cutting blade integrally provided in the groove portion, and the optical fiber cutting blade. And a pair of coating removal blades which are integrally provided in the groove portion with a space therebetween and are arranged to face each other at a predetermined interval in a direction substantially perpendicular to the longitudinal direction, and a resin having a refracting portion in the middle portion A first member made of a material, a groove disposed opposite to the first member, capable of accommodating a coated fiber and corresponding to the groove of the first member, and the first member integrally provided in the groove Corresponding to a pair of coating removal blades of one member, a pair of coating removal blades arranged opposite to each other at a predetermined interval in a direction perpendicular to the longitudinal direction, and an intermediate portion corresponding to the refracting portion of the first member And a second member made of a resin material provided with a refracting portion. An optical fiber stripped folding parts. The respective blades formed on the upper and lower members can be integrally formed when the upper and lower members are molded with a resin material.

  FIG. 1 is a perspective view showing an optical fiber peeling component according to the present invention. FIG. 2 is an exploded view of the first member (ie, the lower member) and the second member (ie, the upper member) shown in FIG. FIG. 2A is a perspective view showing the lower member. FIG. 2B is a perspective view showing the upper member. FIG.2 (c) is the elements on larger scale of the edge part of Fig.2 (a).

  As shown in FIG. 1, an optical fiber peeling component 1 of the present invention includes a lower member 2 made of a resin material and an upper member 3 made of a resin material. The lower member 2 includes one member (that is, a lower left member) 2a and the other member (that is, a lower right member) 2b, and the upper member 3 includes one member (that is, an upper left member) 3a and the other member ( Upper right member 3b. The upper member and the lower member are each formed in a shape in which the optical fiber is accommodated in a longitudinally opposing surface of each of the members 2 and 3, and a substantially conical shape is halved at the end of the groove 4. The optical fiber insertion portions 4-1a and 4-2a are provided.

  As shown in an enlarged view in FIG. 2 (c), this optical fiber insertion portion 4a is provided at the ends of a lower right member and an upper right member, which will be described later, and has a substantially conical shape when the respective members are arranged to face each other. It is formed. Further, a refracting portion 5 having a tapered portion is provided at the central portion of the upper member. As will be described later with reference to FIG. 7, the tapered portion facilitates the bending operation of the left side member.

As shown in FIG. 2A, a groove portion 4-1 is formed in the upper surface central portion of the lower member so as to accommodate the coated optical fiber along the longitudinal direction. An optical fiber cutting blade made of a resin material that scratches the cladding surface of the optical fiber (not shown) and a coating removal blade that removes the coating of the coated optical fiber are integrally formed in the groove at the center of the lower member. Has been. As shown in FIG. 2B, the upper member formed of a resin material includes a refracting portion having a tapered portion on the surface portion of the central portion.
A groove portion 4-2 corresponding to the groove portion shown in FIG. 2A is formed on the surface facing the lower member of the upper member. In the groove portion of the upper member, a coating removal blade made of a resin material that removes the coating of a coated optical fiber (not shown) is integrally formed.

  In the optical fiber cutting blade, the blade of the resin material hits at right angles from below with respect to the axial direction of the coated optical fiber 6. A pair of coating removal blades formed on the upper member and the lower member, respectively, at a predetermined interval are formed of resin material blades from above and below with respect to the coatings located on both sides of the optical fiber core wire, as will be described later. Hits right angle. In addition, protrusions 3c are provided at both ends of the upper member 3, and engaging pillars 2c that engage with the protrusions of the upper member 3 protrude from the four corners of the surface facing the upper member 3 of the lower member 2. Is provided. When the upper member 3 and the lower member 2 are arranged to face each other with the protrusions engaged between the respective engagement columns, the upper member 3 and the lower member 2 are relatively within the height of the engagement column. You can move freely as you approach or leave.

  The lower member, the upper member, the optical fiber cutting blade and the coating removal blade are all made of a resin material, and the resin material forming them is made of an epoxy-based or PPS (polyphenylene sulfide) -based synthetic resin. For example, a widely used synthetic resin for ferrules can be used. Moreover, what mixed the glass filler in the said synthetic resin can also be used. In this case, when the optical fiber cutting blade is pressed and deformed against the optical fiber (the optical fiber without the coating), the glass filler contained in the resin is pressed against the clad surface of the optical fiber, and a predetermined amount is applied to the clad surface portion. Can scratch. If 60% or more of the glass filer is included, the cladding surface of the optical fiber can always be scratched well, the cut surface of the optical fiber is in good condition, and the optical fiber is connected with further reduced connection loss. Can do.

  FIG. 3 is a schematic cross-sectional view for explaining an optical fiber peeling component according to the present invention.

As shown in FIG. 3, the refracting portion at the center of the lower member and the upper member is composed of a connecting portion 7 having a small thickness, and the connecting portion 7 causes the lower left member 2a and the lower right member 2b, and the upper left member 3a and The upper right members 3b are connected to each other. Furthermore, the lower member 2 and the upper member 3 are formed with spaces 8-1 and 8-2, respectively, with an optical fiber interposed therebetween. And between the said blades 9 and 10, the bottom face of the lower member 2 and the top | upper surface of the upper member 3 are provided so that it may not contact an optical fiber. The space in the lower member is generally formed between the optical fiber cutting blade and the coating removal blade, and the space in the upper member is formed from the optical fiber cutting blade to the coating removal blade and further to the front of the coating removal blade. Has been. The lower left member 2a is provided with an optical fiber cutting blade 9 and a coating removing blade 10-1. The upper left member 3a is provided with a coating removal blade 10-2 at a position corresponding to the coating removal blade 10-1. That is, the optical fiber cutting blade 9 is provided only on the lower left member.

  FIG. 4 is an enlarged view for explaining a state in which the optical fiber cutting blade is pressed against the coated optical fiber. As shown in FIG. 4, an optical fiber cutting blade 9 is pressed against the coated optical fiber 6 from below, first the coating 6b is cut, and further pressed against the cladding surface of the optical fiber 6a until the blade 9 itself is deformed. The clad surface of the fiber 6a is scratched.

  FIG. 5 is a diagram for explaining a state of cutting into the coating by each pair of coating removal blades arranged to face each other. The lower member is provided with a pair of coating removal blades 10-1 at a predetermined interval in a direction perpendicular to the longitudinal direction of the lower member, and the upper member is provided with a pair of coating removal blades for the lower member. Corresponding to the above, a pair of coating removal blades 10-2 are provided so as to face each other at a predetermined interval in a direction perpendicular to the longitudinal direction of the upper member. As shown in FIG. 5, when the coated optical fiber 6 is accommodated in the groove and the lower member 2 and the upper member 3 are pressed with a predetermined force at the center, a pair of coating removal blades 10-2 provided on the upper member. The pair of coating removal blades 10-1 provided on the lower member are cut into the coating 6b from above and below, and stop in a state where the tip ends are abutted. That is, the predetermined interval between the pair of coating removal blades 10-1 and 10-2 arranged opposite to each other substantially matches the diameter of the optical fiber core wire, and the coating removal blade is applied to the coating on both sides of the cross section of the optical fiber core wire. Are integrally provided in advance so that the clad surface of the optical fiber is not damaged.

FIG. 6 is an enlarged view for explaining an optical fiber cutting blade and a coating removing blade provided in the groove. 6 (a) shows a coating removing blade pair provided to face arranged at predetermined intervals formed in the upper member, FIG. 6 (b), an optical fiber cutting, which is formed in the lower member 1 shows a pair of blades and a pair of coating removal blades provided facing each other at a predetermined interval. As shown in FIG. 6A, the upper member is provided with a space portion 8-2 on the surface facing the lower member so as to be connected to the groove portion 4-2 in which the coated optical fiber is accommodated. In the space portion, a pair of coating removal blades 10-2 are provided so as to face each other with a predetermined distance from the coated optical fiber. As described above, the predetermined interval substantially coincides with the optical fiber core wire. The space 8-2 provided in the upper member is also provided to extend on the opposite side of the pair of coating removal blades 10-2. The tip of the pair of coating removal blades 10-2 is provided with a taper so as to facilitate cutting into the coating.

As shown in FIG. 6B, the lower member is provided with a groove portion 4-1 in which the coated optical fiber is accommodated on the surface facing the upper member, and the optical fiber cutting blade 9 is provided in the groove portion. . The optical fiber cutting blade 9 is integrally formed so that the blade hits the optical fiber at a right angle. A space portion 8-1 is provided so as to be connected to the groove portion 4-1. The space portion 8-1 is generally provided between the optical fiber cutting blade and the coating removal blade. Corresponding to the pair of coating removal blades 10-2, the space portion 8-1 is provided with a pair of coating removal blades 10-1 facing each other with a predetermined distance from the coating optical fiber. ing. As described above, the predetermined interval substantially coincides with the optical fiber core wire.
The tip of the pair of coating removal blades 10-1 is provided with a taper so that it can be easily cut into the coating. The surface shown in FIG. 6A and the surface shown in FIG.

  As described with reference to FIGS. 4 and 5, the optical fiber cutting blade 9 is pressed against the coated optical fiber 6 from below, so that the coating 6 b is first cut and then the optical fiber 6 a is further deformed until the blade 9 itself is deformed. The optical fiber 6a is scratched by being pressed. The pair of coating removal blades 10-2 provided on the upper member and the pair of coating removal blades 10-1 provided on the lower member are cut into the coating 6b from the top and bottom until the tip ends are abutted. It is. The cladding of the optical fiber is not damaged by the coating removal blade.

In addition, the above-mentioned space portion is scratched on the cladding surface portion of the optical fiber with an optical fiber cutting blade, cut into the coating of the coated optical fiber with a coating removal blade, and then the bending position of the optical fiber is shifted so that the optical fiber is left It has a function of preventing breakage at the joint between the member and the right member.
The distance between the pair of coating removal blades is in the range of 0.128 mm to 0.140 mm when the opposing surfaces of the upper member 3 and the lower member 2 are brought into contact with each other. If the distance is less than 0.128 mm, the cladding of the optical fiber may be damaged. If the distance exceeds 0.140 mm, the coating may not be removed. The thickness of the connecting portion is in the range of 0.4 mm to 2.0 mm. If the thickness of the connecting portion is less than 0.4 mm, the connecting portion may be broken during the operation at an unintended stage. If the thickness of the connecting portion exceeds 2.0 mm, it is difficult to break and the operation may be difficult.

  As described with reference to FIG. 6, the groove portion 4-1 formed in the lower member and the groove portion 4-2 formed in the upper member are arranged to face each other. The optical fiber cutting blade 9 is integrally formed with the lower member in the groove portion 4-1, and the coating removing blade 10-1 is integrally formed with the lower member at the substantially end portion of the space portion 8-1. . Further, in the space portion 8-2 provided to be connected to the groove portion 4-2, the coating removing blade 10-2 is integrally formed with the upper member. When pressed against the coated optical fiber, the optical fiber cutting blade 9 breaks through the coating, and the resin material is softer than an optical fiber made of, for example, quartz glass. 6 pressed against the cladding surface. When the blade 9 is pressed, the clad surface portion of the optical fiber is damaged. In this way, the blade of the resin material can be scratched to the cladding surface portion of the optical fiber without being pulled, pushed in the horizontal direction, or rotated only by being pressed against the optical fiber.

  The coating removal blade 10 is also formed of a resin material. However, since the coating is softer than an optical fiber made of, for example, quartz glass, the pair of blades 10 are pressed against the coated optical fiber from above and below to form the optical fiber. Cut into the cladding on both ends without scratching the cladding.

  In each of the optical fiber cutting blade 9 and the coating removal blade 10, the angle α of the tip of the blade is in the range of 10 to 45 degrees. When the angle α of the tip of the blade is less than 10 degrees, it is difficult to ensure the strength required for an optical fiber cutting blade, and the blade is easily broken and difficult to mold. If the angle α of the blade tip exceeds 45 degrees, even if the blade is pressed against the optical fiber cladding surface, the optical fiber cladding cannot be scratched and the optical fiber cannot be cut. In addition, the cut into the coating is insufficient. In addition, the optical fiber 6 is bent and cleaved toward the side opposite to the damaged part, and the coating is removed.

In one aspect of the optical fiber stripped part of the present invention, at least one corresponding one in the groove of each part of the first member and the second member not provided with the optical fiber cutting blade and / or the coating removal blade. The part is provided with a protrusion for holding the coated optical fiber.
FIG. 7 is a cross-sectional view illustrating the protrusion formed in the groove. FIG. 7A is a cross-sectional view showing a state in which the first member and the second member are arranged to face each other without accommodating the coated optical fiber. FIG. 7B is a cross-sectional view showing a state in which the coated optical fiber is accommodated and the first member and the second member are arranged to face each other. As shown in FIG. 7 (a), the first member 2 and the protrusions 11-1, 11 having a substantially dome-shaped tip portion rounded at the corresponding portions in the groove 4 of the second member 3 are arranged. -2 is provided. As shown in FIG. 7 (b), the protrusions 11-1 and 11-2 press a part of the outer peripheral surface of the coated optical fiber accommodated in the groove to hold the coated optical fiber and fix it in place. To do. At least one pair of protrusions are integrally formed in the groove portions of the first member and the second member. Therefore, a plurality of pairs may be formed at a predetermined interval.

  The positions of the protrusions are preferably corresponding positions in the groove portions of the first member and the second member. By providing the protrusions in this way, the coated optical fiber can be held more securely in the groove portion in the member where the optical fiber cutting blade and the coating removal blade do not exist, so that the optical fiber is cut and the coating is removed. At this time, the optical fiber can be easily peeled off without causing a shift in the position of the coated optical fiber in the groove.

The height of the protrusion is in the range of 0.01 to 0.05 mm from the bottom of the groove. If the height of the protrusion is less than 0.01 mm, more reliable holding of the coated optical fiber in the groove is insufficient, and an effect cannot be expected. On the other hand, if the height of the protrusion exceeds 0.05 mm, the opposed surfaces of the first member and the second member are difficult to contact, so that the coated optical fiber becomes unstable in the groove, and the coated optical fiber is held. Is insufficient.
In one aspect of the optical fiber stripped component of the present invention, each of the grooves has a flat bottom surface and both side surfaces inclined from the bottom surface, and the optical fiber cutting blade is located in the groove portion, and the top of the blade Is formed protruding in the groove of the second member.
FIG. 8A is a diagram for explaining a state in which the flange portion of the optical fiber cutting blade protrudes into the groove portion of the second member. As shown in FIG. 8 (a), the receiving portion of the optical fiber cutting blade 9 integrally formed in the groove 4-1 of the first member 2 is from the surface of the first member (indicated by a dotted line in the figure). Also protrudes upward and is located in the groove of the second member. By projecting the optical fiber cutting blade into the groove portion of the second member in this way, the cutting blade is reliably pressed by the optical fiber, and cutting becomes easier and more reliable.

  In one aspect of the optical fiber peeling component of the present invention, a stage is provided at a portion facing the optical fiber cutting blade in the groove portion of the second member. FIG. 8B is a diagram illustrating a stage provided at a portion in the groove facing the optical fiber cutting blade. In the above-described embodiment, the distance between the top portion of the blade and the optical fiber is shortened by projecting the ridge portion of the optical fiber cutting blade into the facing groove, and the optical fiber cutting blade is securely attached to the optical fiber. I was able to be pressed against.

In this aspect, a stage is provided in the groove of the second member to relatively shorten the distance between the top of the blade and the optical fiber so that the optical fiber cutting blade is reliably pressed against the optical fiber. ing. As shown in FIG. 8 (b), the light in the groove part 4-2 of the second member 3 disposed opposite to the first member 2 in which the optical fiber cutting blade 9 is integrally formed in the groove part 4-1. A stage 12 is provided at a site corresponding to the fiber cutting blade 9.
In this case, the top portion of the optical fiber cutting blade 9 is formed substantially coincident with the surface of the first member 2. The stage 12 may be formed integrally with the second member 3 by a rectangular member having a flat surface. The surface of the stage 12 may be a concave shape corresponding to the outer periphery of the coated optical fiber. By providing the stage in this way, the distance between the top of the blade and the optical fiber is relatively shortened, and the optical fiber cutting blade is reliably pressed by the optical fiber, so that the cutting becomes easier and more reliable.

  In one aspect of the optical fiber peeling component according to the present invention, when the first member and the second member are arranged to face each other, the optical fiber cutting blade and the coating removal in each of the first member and the second member A predetermined space is provided between the blades. The space part mentioned above is an optical fiber peeling component formed over the first member and the second member. The space part may be formed only in the second member.

FIG. 9 is a cross-sectional view illustrating the space portion. In the embodiment shown in FIG. 9, the space formed between the optical fiber cutting blade and the coating removal blade is 8 and is formed only in the second member 3. Furthermore, as shown in FIG. 10, the space portion 8 formed in the second member 3 may include a tapered portion 13 that is inclined upward from the optical fiber cutting blade toward the coating removal blade. In the embodiment shown in FIG. 10, the space 8 is provided only in the second member and includes the above-described tapered portion.
FIG. 11 is a cross-sectional view illustrating another aspect of the space portion. As shown in FIG. 11, the space portion is formed from the first member to the second member, and the space portion formed in the second member includes a tapered portion that is inclined upward from the optical fiber cutting blade toward the coating removal blade. Similarly to the second member, the space formed in the first member also includes a tapered portion that is inclined upward from the optical fiber cutting blade toward the coating removal blade.
As described above, by providing the tapered portion in the space portion, the coating is more easily removed after the optical fiber is cut.

  Next, an optical fiber peeling method will be described.

  The optical fiber peeling method according to the present invention includes the following steps.

That is, a groove portion that can accommodate a coated optical fiber extending in the longitudinal direction, an optical fiber cutting blade that is integrally formed in the groove portion, and an optical fiber cutting blade that is integrally provided in the groove portion with a space therebetween A pair of coating removal blades arranged opposite to each other at a predetermined interval in the direction perpendicular to the longitudinal direction, a second member made of a resin material having a refractive portion in the middle, and a coated fiber can be accommodated And a pair of opposingly arranged at a predetermined interval corresponding to the groove portion corresponding to the groove portion of the first member and the pair of coating removal blades of the first member provided integrally in the groove portion. And a second member made of a resin material provided with a refracting part corresponding to the refracting part of the first member in the intermediate part,
A coated optical fiber is accommodated in the groove,
In the central portion, the lower member and the upper member are pressed with a predetermined force, the optical fiber cutting blade is pressed against the optical fiber until the blade itself is deformed, and the optical fiber is damaged.
In the refracting portion, a tension is applied to the portion of the optical fiber damaged by the optical fiber cutting blade, bent to the opposite side to the scratch, and the optical fiber is cut. Removing the coating of the optical fiber by the coating removing blade;

With reference to FIG. 12, the optical fiber peeling method of this invention is demonstrated.
As shown in FIG. 12A, the lower member and the upper member are engaged with each other in a state where the surfaces on which the groove portions 4 are formed are opposed to each other, and the lower member is removed from the optical fiber insertion portion formed at the end of the groove portion 4 Then, a single-core coated optical fiber is inserted into the groove of the upper member until the tip exceeds the optical fiber cutting blade. Then, the coated optical fiber is attached to the optical fiber peeling component 1 by being sandwiched between the lower member and the upper member.

  In this state, press the lower member and upper member with your thumb and forefinger as shown in the figure, and also correspond to the optical fiber cutting blade and sheath removal blade of the lower left member and upper left member, which are the left members in the figure A portion to be pressed is pressed with a finger to bring the opposing surfaces of the lower member and the upper member into contact with each other. At this time, the optical fiber cutting blade 9 breaks through the coating of the coated optical fiber, contacts and deforms the cladding surface of the optical fiber, and scratches the cladding surface portion, and each pair of coating removal blades 10 forms the coating optical fiber in the vertical direction. Cut the coating by cutting into the coating on both ends.

  Next, as shown in FIG. 12B, the optical fiber cutting blade is hand-folded on the opposite side (ie, upward in the drawing). At this stage, the optical fiber coating is removed and the bare fiber is exposed at the connecting portion between the left member and the right member. Further, as shown in FIG. 12B, the optical fiber is cut at a site damaged by the optical fiber cutting blade. At the stage of FIG. 12 (c), the cut optical fiber is opened, and the coating is removed and the bare fiber is exposed as shown in FIG. 12 (d).

  An optical connector was assembled using an optical fiber cut with an optical fiber cutting blade in this way, and a refractive index matching agent was applied to the connection end face and connected. The following connection loss could be realized.

According to the present invention, since the work can be performed by pressing the lower member and the upper member with a finger and pressing with a predetermined force, the terminal portion of the coated optical fiber can be easily processed manually. Moreover, it can process without using a special tool.
Furthermore, since the blade is not moved in a direction perpendicular to the longitudinal axis of the optical fiber, anyone can easily scratch and cut the optical fiber.

According to the present invention, since the optical fiber cutting blade and the coating removal blade are integrally formed with the resin material, the cost can be reduced. In addition, since any blade is formed of a resin material and is lower in cost than the conventional one, the member on which the blade is formed may be discarded after use.
In addition, since the present invention is applied to a coated optical fiber before removing the coating, in this case, the optical fiber that is unnecessary after cutting is a coated optical fiber with a coating. It is also possible to prevent injuries by piercing the hand with the optical fiber coating removed.

According to the invention, such as stabilizers even where bad working conditions, such as darkness and able to operate, regardless of the skill of the operator, the cutting edges a good optical fiber coating is divided The optical fiber peeling component and the optical fiber peeling method can be provided, and the industrial utility value is high.

FIG. 1 is a perspective view showing an optical fiber peeling component according to the present invention. FIG. 2 is an exploded view of the lower member and the upper member shown in FIG. FIG. 2A is a perspective view showing the lower member. FIG. 2B is a perspective view showing the upper member. FIG. 3 is a schematic cross-sectional view for explaining an optical fiber peeling component according to the present invention. FIG. 4 is an enlarged view for explaining a state in which the optical fiber cutting blade is pressed against the coated optical fiber. FIG. 5 is a diagram for explaining a state of cutting into the coating by each pair of coating removal blades arranged to face each other. FIG. 6 is an enlarged view for explaining an optical fiber cutting blade and a coating removing blade provided in the groove. FIG. 7 is a diagram for explaining a protrusion formed in the groove. FIG. 8A is a view for explaining a state in which the flange portion of the optical fiber cutting blade protrudes into the groove portion of the second member. FIG. 8B is a diagram illustrating a stage provided at a portion in the groove facing the optical fiber cutting blade. FIG. 9 is a cross-sectional view illustrating the space portion. FIG. 10 is a cross-sectional view illustrating another aspect of the space portion. FIG. 11 is a cross-sectional view illustrating another aspect of the space portion. FIG. 12 is a diagram for explaining the optical fiber peeling method of the present invention. FIG. 13 is a perspective view showing a conventional optical fiber cutter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical fiber peeling part 2 Lower member 2a Lower left member 2b Right lower member 2c Engagement pillar 3 Upper member 3a Upper left member 3b Upper right member 3c Projection part 4, 4-1 Groove part 4-1a, 4-2a Optical fiber insertion part 5 Bending part 6 Optical fiber 7 Connecting part 8 Space part 9 Optical fiber cutting blades 10, 10-1, 10-2 Coating removal blades 11-1, 11-2 Projection part 12 Stage 13 Taper part

Claims (20)

A groove that can accommodate a coated optical fiber extending in the longitudinal direction, an optical fiber cutting blade that is integrally provided in the groove, and a length that is integrally provided in the groove with a distance from the optical fiber cutting blade. A pair of coating removal blades arranged to face each other at a predetermined interval in a direction perpendicular to the direction, a first member made of a resin material provided with a refracting part in the middle part,
A pair of coating removal of the first member integrally provided in the groove portion and the groove portion corresponding to the groove portion of the first member, which is disposed facing the first member and can accommodate the coated fiber. A resin comprising a pair of coating removal blades arranged to face each other at a predetermined interval in a direction perpendicular to the longitudinal direction corresponding to the blades, and a refractive portion corresponding to the refractive portion of the first member in the intermediate portion An optical fiber peeled part comprising a second member made of a material.   The pair of sheath removal blades of the first member has a tapered portion at an end thereof, and the pair of sheath removal blades of the second member is an end corresponding to the taper portion of the first member. The optical fiber peeled component according to claim 1, further comprising a tapered portion.   Each refracting portion of the intermediate portion is formed of a connecting portion having a small thickness, and one member and the other member of the first member, and one member and the other member of the second member are formed by the connecting portion. The optical fiber stripped parts according to claim 1, wherein the optical fiber stripped parts are connected to each other.   The optical fiber peeled part according to claim 3, wherein the thickness of the connecting portion is within a range of 0.4 to 2.0 mm.   When the first member and the second member are arranged to face each other, a predetermined space portion is provided between the optical fiber cutting blade and the coating removal blade in one member of the first member and the second member. The optical fiber peeled part according to any one of claims 1 to 4, wherein the optical fiber peeled part is provided.   The optical fiber peeled component according to claim 5, wherein the space is formed across the first member and the second member.   The optical fiber peeling component according to claim 5, wherein the space is formed only in the second member. Wherein the space portion formed in the second member, said optical space portion from the fiber cutting blade toward the coat removing blade is provided with a tapered portion of gradually deeper comprising such inclination, claim 6 or 7 Optical fiber stripped parts as described in 1. Wherein the space portion formed in the first member, the space portion from the optical fiber cutting blade toward the coat removing blade is provided with a tapered portion inclined as gradually shallower, according to claim 6 Optical fiber stripped parts. When the opposing surfaces of the first member and the second member are brought into contact with each other, the optical fiber cutting blade is pressed against the optical fiber stored in the groove until the blade itself is deformed, and the light A height at which the fiber is damaged, and a distance between each pair of the coating removal blades of the first member and the second member is substantially equal to a diameter of the optical fiber core of the coated optical fiber . The optical fiber stripped part according to any one of claims 1 to 9, wherein   The optical fiber according to any one of claims 1 to 10, wherein the resin material is made of an epoxy-based or PPS (polyphenylene sulfide) -based synthetic resin and contains 60% or more of a glass filler. Peeled parts.   Each of the groove portions has a flat bottom surface and both side surfaces inclined from the bottom surface, the optical fiber cutting blade is located in the groove portion, and the top portion of the blade substantially coincides with the surface of the first member. The optical fiber peeled part according to claim 10 or 11, wherein the optical fiber peeled part is formed.   Each of the groove portions has a flat bottom surface and both side surfaces inclined from the bottom surface, and the optical fiber cutting blade is located in the groove portion, and the top portion of the blade protrudes into the groove portion of the second member. The optical fiber peeled part according to claim 10 or 11, wherein the optical fiber peeled part is formed.   The optical fiber stripped part according to claim 10 or 11, wherein a distance between each pair of coating removal blades is in a range of 0.128 to 0.140 mm.   The optical fiber peeling component according to any one of claims 10 to 14, wherein an angle of a tip portion of the optical fiber cutting blade and the coating removing blade is within a range of 10 to 45 degrees. 10. The optical fiber according to claim 3, wherein one member of the second member is provided with a tapered portion on an opposite surface side facing the other member. Peeled parts.   Protrusion for holding the coated optical fiber at at least one corresponding portion in the groove of each portion of the first member and the second member not provided with the optical fiber cutting blade and / or the coating removal blade The optical fiber peeled component according to any one of claims 1 to 16, further comprising:   18. The optical fiber peeled part according to claim 17, wherein the height of the protrusion is in the range of 0.01 to 0.05 mm. The optical fiber peeled component according to any one of claims 1 to 18, wherein a stage is provided at a portion facing the optical fiber cutting blade in the groove portion of the second member. A groove that can accommodate the coated optical fiber in the longitudinal direction, an optical fiber cutting blade that is integrally formed in the groove, and a length that is integrally provided in the groove with a distance from the optical fiber cutting blade. A pair of coating removal blades arranged to face each other at a predetermined interval in a direction perpendicular to the direction, a first member made of a resin material having a refractive portion at an intermediate portion, and a first member made of a resin material capable of accommodating a coated fiber Corresponding to the groove portion corresponding to the groove portion of the member and the pair of coating removal blades of the first member integrally provided in the groove portion, they are arranged to face each other at a predetermined interval in a direction perpendicular to the longitudinal direction. A pair of coating removal blades and a second member made of a resin material provided with a refracting portion corresponding to the refracting portion of the first member in the intermediate portion,
A coated optical fiber is accommodated in the groove,
In the central portion , the first member and the second member are pressed with a predetermined force, the optical fiber cutting blade is pressed against the optical fiber until the blade itself is deformed, and the optical fiber is damaged.
In the refracting portion, a tension is applied to the portion of the optical fiber damaged by the optical fiber cutting blade, bent to the opposite side to the scratch, and the optical fiber is cut. An optical fiber peeling method, wherein the coating of the optical fiber is removed by the coating removal blade.

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