JP2017187560A - Optical fiber breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply break a glass optical fiber projecting out from a ferrule top end.SOLUTION: A waste box 15 is removably arranged on a body portion 11. A lateral hole portion 16 is provided on a side part of the waste box 15, and an upper hole portion 17 for inserting a breaking plate 19 is formed on an upper part. An optical fiber C attached with a ferrule F is inserted in the waste box 15 with the ferrule F through the lateral hole portion 16. When an arm portion is pushed from an upper side by a finger to be closed and stopped on the body portion 11, the breaking plate 19 abuts on a surface of the optical fiber C while being kept in a posture generally orthogonal to an opening/closing direction. If pushing the arm portion, the optical fiber C is scratched at a predetermined position by the breaking plate 19, and broken by further pressing. A top end part of the broken optical fiber C is stored in the waste box 15.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a handy type optical fiber breaker for breaking a glass optical fiber protruding from a ferrule tip.

  When attaching an optical fiber to a connector, it is necessary to fix the optical fiber to a ferrule with an adhesive and then fold the core wire to a predetermined length.

  Conventionally, glass optical fibers are often broken by manually scratching a part of the surface of the optical fiber with a knife or the like, and breaking it based on the scratches. However, since this breakage is performed solely on the basis of the operator's experience, the same standard is not always obtained.

  Since the frequency at which the optical fiber is broken by such work is extremely high, it is strongly desired to realize a handy type optical fiber breaker that can be easily used in the field.

  As this type of product, Patent Document 1 discloses an optical fiber cutter for slicing and cutting a core of a plastic optical fiber.

  In the optical fiber cutter 1 of Patent Document 1, the ferrule is positioned in the radial direction by inserting the ferrule into the insertion hole 2 as shown in FIG. 6, and in this state, the fiber core wire protruding from the tip of the ferrule is attached to the arm portion. It can be cut by the core wire cutting part 4 arranged in 3.

  The core wire cutting part 4 is a metal blade part having a short side 5, a long side 6, and an oblique blade main body part 7 connecting the end part of the short side 5 and the end part of the long side 6. The blade body portion 7 that comes into contact with the fiber core wire is sharp. The core wire cutting part 4 is attached to the arm part 3 so that the short side 5 is on the shaft part 8 side.

Japanese Patent No. 3018926

  However, the fiber core wire cut by the optical fiber cutter of Patent Document 1 is a plastic core wire, and as shown in FIG. Slice cut while pulling to the side.

  When a hard glass optical fiber is cut using the plastic optical fiber cutter 1 of Patent Document 1, a sharp and fragile blade main body portion 7 is lost.

  An object of the present invention is to provide a handy type optical fiber breaker that can solve the above-mentioned problems and can easily break a glass optical fiber protruding from a ferrule tip.

  An optical fiber breaker according to the present invention for achieving the above object is an optical fiber breaker for breaking a glass optical fiber protruding from a tip of a ferrule at a predetermined length position. And an arm portion that is attached to be freely opened and closed by a shaft portion provided at one end of the main body portion, and the arm portion includes a breaker plate that breaks the optical fiber, and a ferrule insertion hole provided in the main body portion. By inserting and locking the ferrule, the optical fiber protruding from the ferrule is maintained in a posture substantially orthogonal to the opening / closing direction of the broken plate, and the optical fiber protruding from the ferrule is broken. It is characterized by.

  According to the optical fiber breaker according to the present invention, the broken plate attached to the arm portion is held in a posture orthogonal to the glass optical fiber protruding from the ferrule, and a part of the surface of the optical fiber is scratched. The optical fiber can be easily broken by pressing the optical fiber.

It is a perspective view of an optical fiber breaker. It is a side view. It is explanatory drawing of the state before inserting a ferrule in a main-body part. It is explanatory drawing of the state which inserted the ferrule in the main-body part. It is explanatory drawing which cut | disconnects an optical fiber. It is a side view of the optical fiber cutter of a prior art example. It is explanatory drawing of the cut of the core wire of the optical fiber cutter of a prior art example.

The present invention will be described in detail based on the embodiment shown in FIGS.
FIG. 1 is a perspective view of an optical fiber breaker 10, and FIG. 2 is a side view. The optical fiber breaker 10 is a handy type that breaks a glass optical fiber C, and the glass optical fiber C that is broken by the optical fiber breaker 10 is made of an optical glass having excellent light transmittance as a core material. Adopted glass that has excellent weathering resistance is used for the cladding material that covers the core material.

  The optical fiber breaker 10 includes a metal main body 11 and a metal arm 13 that can be opened and closed via a hinged shaft 12 provided at one end of the main body 11. The arm portion 13 is urged in the upward lifting direction by an elastic member 14 such as a coil spring disposed between the arm portion 13 and the body portion 11.

  A waste box 15 made of a transparent resin material is detachably disposed at the tip of the main body 11. A side hole portion 16 is provided at a side portion of the waste box 15, and a slit-like upper hole portion 17 for inserting the broken plate 19 is formed at the upper portion.

  A ferrule insertion hole 18 is formed in a side portion at the front end of the main body 11, and the ferrule insertion hole 18 communicates with a lateral hole portion 16 provided in the waste box 15. The ferrule insertion hole 18 is for inserting the ferrule F attached with the optical fiber C, and the inner diameter of the ferrule insertion hole 18 is substantially the same as the ferrule F to be inserted.

  A folding plate 19 protrudes downward from the arm portion 13. With the arm portion 13 closed as shown by a one-dot chain line in FIG. 2, the folding plate 19 is disposed from the upper hole portion 17 of the waste box 15 to the waste box 15. The optical fiber C at the tip of the ferrule F located in the waste box 15 is broken.

  The folded plate 19 is a soft thin plate made of, for example, a synthetic resin and used for polishing in which abrasive grains are mixed. For example, diamond grains are preferably used as the abrasive grains.

  The broken plate 19 has a short side 19a, a long side 19b, and an oblique cut side 19c that connects the end of the short side 19a and the end of the long side 19b. The tip of the broken side 19c is in a state where the thin plate is cut, and the entire broken plate 19 is configured with the same thickness.

  The broken side 19c is arranged so that the angle between the main body 11 and the extension line of the broken side 19c in the direction of the shaft 12 is larger than the angle between the main body 11 and the arm 13. For example, an appropriate shape can be adopted as the folding plate 19.

  The arm portion 13 is provided with a guide pin 20 facing downward, and a guide mechanism is provided so as to enter the pin hole 21 provided in the main body portion 11 by closing the arm portion 13.

  In use, first, as shown in FIG. 3, the optical fiber C to which the ferrule F is attached is inserted in the direction of the arrow of the ferrule insertion hole 18 from the side, and the optical fiber C is inserted together with the ferrule F through the lateral hole portion 16. Insert into the waste box 15.

  When the ferrule F passes through the ferrule insertion hole 18, dirt such as an adhesive adhering to the ferrule F is wiped off and removed. Then, as shown in FIG. 4, when the flange Fa of the ferrule F comes into contact with the side portion of the main body portion 11, the insertion of the ferrule F into the main body portion 11 is stopped.

  Here, when the arm portion 13 is pushed from above with a finger and closed on the main body portion 11 against the urging force of the elastic member 14, the broken plate 19 is maintained in a posture substantially orthogonal to the opening and closing direction, and the ferrule The broken plate 19 comes into contact with the surface of the glass optical fiber C protruding from F. When the arm portion 13 is pushed in, the optical fiber C is broken at a predetermined position by the broken plate 19, and the front end portion of the broken optical fiber C falls into the waste box 15 and is stored.

  FIG. 5 is an explanatory diagram for cutting the optical fiber C by the optical fiber breaker 10. A contact point P at which the broken side 19c contacts the optical fiber C is inside a circular locus passing through the center of the optical fiber C with the shaft portion 12 as the center.

  When the arm 13 is further pressed after the broken side 19c of the broken plate 19 abuts against the surface of the optical fiber C, the entire broken side 19c moves in the Y1 direction of the arrow, and at the same time, the broken side 19c and the optical fiber C The contact point P moves slightly in the Y2 direction. At this time, the surface of the optical fiber C is minutely scratched. When the arm portion 13 is pushed in, the broken plate 19 presses the optical fiber C in the Y3 direction.

  On the other hand, the conventional optical fiber cutter of Patent Document 1 is in contact with the optical fiber core wire outside the circular orbit as shown in FIG. 7, and this optical fiber cutter is different in that it is sliced so as to draw the optical fiber core wire. doing.

  In the present embodiment, by utilizing the characteristic of the glass material that can be easily broken when pressure is applied after being scratched, even the broken plate 19 made of a soft material is used for the optical fiber C having minute scratches. By pushing the surface, the optical fiber C can be easily broken at the damaged part.

  Since the trash box 15 is transparent, it can be confirmed from the outside whether there is swarf. If the trash box 15 is filled with swarf, the trash box 15 may be removed from the main body 11 and the internal swarf may be discarded. Alternatively, the entire waste box 15 containing chips can be replaced.

  And if the ferrule F which cut | disconnected the front-end | tip of the optical fiber C is pulled out from the ferrule penetration hole 18, the optical fiber C will be cut | disconnected in a predetermined position and the surrounding cleaned ferrule F can be obtained.

  According to the optical fiber breaker 1 according to the present invention, the glass plate optical fiber C protruding from the ferrule F is held in a posture in which the broken plate 19 attached to the arm portion 13 is orthogonal to the optical fiber C. By scratching part of the surface and pressing the optical fiber C, the optical fiber C can be easily broken.

DESCRIPTION OF SYMBOLS 10 Optical fiber breaker 11 Main-body part 12 Shaft part 13 Arm part 14 Elastic member 15 Waste box 18 Ferrule insertion hole 19 Breaking plate C Optical fiber F Ferrule

Claims (4)

An optical fiber breaker for breaking a glass optical fiber protruding from the tip of a ferrule at a predetermined length position,
A main body portion and an arm portion that is attached to be freely opened and closed by a shaft portion provided at one end of the main body portion, and the arm portion includes a breaking plate that breaks the optical fiber;
By inserting and locking the ferrule in a ferrule insertion hole provided in the main body, the optical fiber protruding from the ferrule is maintained in a posture substantially orthogonal to the opening / closing direction of the broken plate, and the ferrule An optical fiber breaker that breaks the optical fiber protruding from the optical fiber.   2. The optical fiber breaker according to claim 1, wherein the breaker plate is a soft thin plate mixed with abrasive grains, and the entire breaker plate has the same thickness.   The broken plate has a broken side portion that comes into contact with the optical fiber, and an angle between the main body portion and an extension line of the broken side portion in the direction of the shaft portion is between the main body portion and the arm portion. The optical fiber breaker according to claim 1, wherein the optical fiber breaker is larger than the angle.   The optical fiber breaker according to any one of claims 1 to 3, wherein an elastic member is disposed between the arm portion and the main body portion.

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