JPS61162006A - Cutting device for optical fiber - Google Patents

Abstract

PURPOSE:To cut off an optical fiber precisely by one press of a cutting knife by moving the cutting knife in the vertical direction to the pressing direction of the cutting knife every press of the cutting knife to the optical fiber bare wire so that the sharpest position of the cutting knife is pressed against the bare wire to form an initial flaw. CONSTITUTION:The optical fiber bare wire F is fitted to a holding part 2 and the leading end part of the wire F is held between both chuck chips 20, 22. An adjusting screw 33 of a cutting means 4 is pressed in the direction of the wire F and the cutting knife 34 is pressed against the side of the wire F held by the holding part 2. When the cutting knife 34 is abutted upon the wire F, a compression spring 30 is contracted to absorb the pressing force, so that the pressing force of the cutting knife 43 against the wire F is almost fixed and the prescribed initial flaw can be formed on the wire F. Then, the working shaft 13 of a tensile means 3 is depressed to apply the tension to the wire F having the initial flaw and to cut off the wire F from the position of the initial flaw.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an optical fiber cutting device, and more particularly to a cutting blade that presses against a bare optical fiber to cause an initial scratch in order to cut the bare optical fiber.

[Conventional technology]

Conventionally, to cut a bare optical fiber, a cutting blade is pressed against the surface of the bare optical fiber to cause an initial flaw, and tension is applied to the bare optical fiber in the axial direction to break it from the initial flaw. The bare wire had been cut.

(Problems to be Solved by the Invention) In the above-mentioned conventional configuration, pressing the cutting blade against the bare optical fiber damages the surface of the bare optical fiber and always causes the cutting blade to spill. The way the surface of the bare optical fiber is scratched varies depending on the condition of the spill, so even if tension is applied to the bare optical fiber, it may not break.Furthermore, the spillage of the cutting blade may cause damage to the surface of the bare optical fiber. There was a problem in that the position at which the cutting blade was pressed against the bare wire was not determined, and therefore the breaking position of the bare optical fiber wire was not determined.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide an optical fiber cutting device that can reliably break a bare optical fiber by pressing a cutting blade once and keeps the breaking position constant. The purpose is to

(Means for Solving the Problems) The present invention is characterized in that the cutting blade 43 is pressed against the side surface of the bare optical fiber F in a direction orthogonal to the axial direction of the bare optical fiber F. In an optical fiber cutting device that cuts the bare optical fiber F by giving an initial scratch, the cutting blade 43 is provided so as to be movable in a direction perpendicular to the direction in which the bare optical fiber F is pressed, and each time the bare optical fiber F is pressed, The cutting blade 43 is moved vertically and pressed against the bare optical fiber F.

[Effect]

The present invention moves the cutting blade in a direction perpendicular to the pressing direction each time the cutting blade is pressed against the bare optical fiber,
The good blade part of the cutting blade is pressed against the bare optical fiber to cause an initial scratch.

[Embodiment] Next, the configuration of an embodiment of the present invention will be described with reference to the drawings.

1 is a base, and on the top surface of this base 1 is a bare optical fiber F.
an optical fiber bare wire holding section 2 that holds the
A tensioning means 3 which applies a tensile force by pinching the tip of the bare optical fiber 11F held by the holding part 2, and a cutting means 4 which applies an initial flaw to the side surface of the bare optical fiber F held by the holding part 2 are provided. Furthermore, a handle 5 is provided on the bottom surface of the base 1.

The bare optical fiber 11F has a resin coating applied to its surface and a connector 6 attached thereto, and the end of the bare optical fiber F protrudes from the tip of the connector 6.

The bare optical fiber holder 2 is provided on the upper surface of one end of the base 1, and the front surface of the holder 2 has an insertion hole 8 into which the bare optical fiber 111F connector 6 is inserted and holds the tip of the connector 6 in position. The tip of the bare optical fiber F is projected onto the surface of the holding portion 2 through a through hole 9 opened at the center of the insertion hole 8 . In addition, this holding part 2
A cutting blade 43 (to be described later) is installed on the right side of the insertion hole 8 and the through hole 9 facing the cutting means 4 for cutting the bare optical fiber I!
A guide plate 10 that guides F is provided in a protruding manner.

The tensioning means 3 is provided on one end side of the base 1 so as to be able to move toward and away from the holding section 2. This tensioning means 3 has a moving table 11, and this moving table 11 is attached to an end surface of the base 1 by a plurality of support shafts 12 which penetrate through the front and rear surfaces of the base 1 and are slidably provided in the front and rear directions. The movable base 11 is moved in the front-rear direction by an operating shaft 13 which is supported so as to be able to approach and separate from the base 1 and which is connected to the movable base 11 by passing through the base 1 between the support shafts 12 . A support section 14 is erected on the right side of the upper surface of the movable table 11, and a plurality of horizontal shafts 15 are vertically installed on the support section 14 in a horizontal direction above the movable table 11. A movable body 16 is slidably fitted therein.

Further, a fixed piece 11 is provided at the other end of the horizontal shaft 15, and a compression spring 18 is attached to the horizontal shaft 15 between the fixed piece 11 and the movable body 16 to support the movable body 16. Part 1
It is biased in the direction of 4. Further, a fixed chuck piece 20 is provided on the upper side of the support part 14, and
A movable chuck piece 22 is provided on the upper side of the moving body 16 so as to be rotatable by a shaft 21, and both chuck pieces 20, 22
The tip of the bare optical fiber F held by the holding part 2 faces in between, and the bare optical fiber F is held by the compression spring 18.
is held between the moving body 1 and the tip is screwed to the support part 14.
Both chuck pieces 2 are fixed by adjusting screws 23 that contact the sides of
The interval between 0.22 is to be adjusted. Further, a head 12a is provided at the end of the support shaft 12 to prevent the support shaft 12 from being removed from the base 1.

The cutting means 4 is provided on the upper surface of the other end of the base 1, and a sliding plate portion 26 is slidable on a slide bearing 25 provided on the base 1 in a direction in which the sliding plate portion 26 approaches and separates from the holding portion 2. An operating protrusion 21 is provided at one end of the sliding plate portion 26 on the front side (lower side in FIG. 1) in the direction of the holding portion 2 . This operating protrusion 27 has stoppers 28a at both ends.
A sliding shaft 29 having a diameter of 28b is inserted freely,
One stopper 28b of this sliding wheel 29 and the operating protrusion 21
A compression spring 30 is interposed between the side portions. One stopper 28b of the sliding shaft 29 is brought into contact with the tip of an adjusting screw 33 screwed into a protrusion 32 provided on the upper part of the sliding body 31.

The sliding body 31 is fitted into a support shaft 35 installed between support protrusions 34 and 34 protruding from the front surface of the base 1 so as to be freely movable. Further, a support 3 is provided on the upper surface of the sliding plate portion 26.
6 is erected, and a moving groove 37 is provided inside the support body 36 that opens along the vertical direction and is open on the side opposite to the holding part 2. 38 is provided so as to be movable in the vertical direction. This holder 38 has a compression spring 39 at the bottom of the moving groove 37.
A mounting plate 40 is provided on the upper surface of the support 36, and the tip of the operating shaft 42 of a micrometer 41 mounted on the mounting plate 40 touches the upper surface of the holder 38. The micrometer 41 is used to adjust the vertical position of the holder 38 within the support body 36.

A cutting blade 43 made of tangle tin carbide carbide, diamond, ruby, or the like is provided at the end of the holder 38 facing the holding portion 2 .

Next, the cutting operation of the bare optical fiber F will be explained.

The optical fiber bare wire F is attached to the holding part 2, and the tip of this optical fiber bare wire F is held on both chuck pieces 20 of the tensioning means 3.
22.

Next, tighten the adjusting screw 33 of the cutting means 4 to the bare optical fiber F.
The cutting blade 43 is pressed against the side surface of the bare optical fiber F held by the holding part 2 by pressing in the direction shown in FIG. At this time, when the cutting blade 43 comes into contact with the bare optical fiber F, the compression spring 30 contracts and absorbs the pressing force, so that the pressing force of the cutting blade 43 against the bare optical fiber F becomes almost constant, and a predetermined amount is applied to the bare optical fiber 1i1F. It is possible to inflict an initial wound.

Next, the actuating shaft 13 of the tensioning means 3 is pressed to apply tension to the bare optical fiber 11F with the initial flaw, thereby breaking the bare optical fiber 11F from the location of the initial flaw. At this time, the clamping force between the two chuck pieces 20 and 22 that pulls the tip of the bare optical fiber F is determined by the compression spring 18, so even if an excessive pressing force is applied to the operating shaft 13, the tip of the bare optical fiber Since the pieces 20 and 22 are removed, a substantially constant tension can be applied to the bare optical fiber F.

Further, each time the cutting blade 43 is pressed against the bare optical fiber F, the cutting blade 43 is moved from the bottom to the top or from the top to the bottom using the micrometer 41, and the part where the cutting blade 43 is pressed against the bare optical fiber 11F is pressed. Change every time.

The maximum movement of this cutting blade 43 is, for example, an outer diameter of 125
By pressing the cutting blade 43 made of carbide with a cutting edge angle of 80 degrees against the quartz-based bare optical fiber F of 1.5 m, the cutting blade 43 had a breakage of approximately 20IiIR (the pressing load was 10 ~20g). Therefore, the moving pitch is determined to be 30, and when the cutting blade 43 is moved with this pitch and pressed against the optical fiber bare wire F, tension is applied to all the optical fibers by one pressing. Broken. At this time, the tension at 1tlJ[lFi is all 200
g or less, and all of the resulting fractured surfaces were mirror-finished.

In the above embodiment, since the pressing load of the cutting blade 43 is weak at 10 to 20 g, it is necessary to maintain the advancing direction of the cutting blade 43 in the horizontal direction with an accuracy of within ±1 degree. (It may also be possible to determine the direction of movement of the cutting blade 43 by providing a device such as the

〔Effect of the invention〕

According to the present invention, the cutting blade that presses against the side surface of the bare optical fiber to give an initial scratch is provided so as to be movable in the direction perpendicular to the pressing direction, and the cutting blade is moved each time the bare optical fiber is pressed against the bare optical fiber. Since it is moved in the vertical direction, the part of the cutting blade that is always in good condition can be pressed against the bare optical fiber wire, and at the same time, by keeping the conditions for pressing the cutting blade against the bare optical fiber wire constant, the bare optical fiber wire can be easily removed. The initial scratches necessary to achieve mirror-like breakage can be formed on the surface of the bare optical fiber, and the bare optical fiber can be reliably broken by applying tension by pressing the cutting blade only once. At the same time, the fracture surface becomes a mirror surface, and since the part of the cutting blade that is always in good condition is pressed against the bare optical fiber wire, the position of the cutting blade becomes the fracture position and the fracture position of the bare optical fiber wire remains constant. .

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the optical fiber cutting device of the present invention, and FIG. 2 is a front view thereof. 43... Cutting blade, F... Optical fiber bare wire. January 10, 1985 Inventor Kawauchi Previous Takashi Kishimoto Patent applicant Sanko Wire Industry Co., Ltd. Nippon Sheet Glass Co., Ltd. Yamanashi Sanko Co., Ltd. 222 Co., Ltd.

Claims (1)

[Claims] (1) In an optical fiber cutting device that presses a cutting blade against the side surface of a bare optical fiber from a direction perpendicular to the axial direction of the bare optical fiber to give an initial scratch to the side surface of the bare optical fiber and cut the bare optical fiber, The cutting blade is movable in a direction perpendicular to the direction in which the bare optical fiber is pressed, and each time it is pressed against the bare optical fiber, the cutting blade is moved in the vertical direction and pressed against the bare optical fiber to eliminate initial scratches. An optical fiber cutting device characterized by giving.