JP2012168260A - Optical fiber cutting apparatus - Google Patents

Abstract

In an optical fiber cutting apparatus configured to cut an optical fiber by bringing a blade into contact with the optical fiber in a state where the optical fiber is positioned on the apparatus body, the optical fiber can be cut by a simple operation. The surface can be stably formed at a predetermined inclination angle with respect to the axis orthogonal plane.
A clamping operation of an optical fiber 2 by a pair of clamping units 22A, 22B, a bending applying operation to the optical fiber 2 by a bending applying mechanism 24, a tension applying operation to the optical fiber 2 by a tension applying mechanism 26, and a blade The blade moving operation of the blade 20 to the contact position of the blade 20 with the optical fiber 2 by the moving mechanism 28 is sequentially performed in conjunction with the closing operation of the operation lever rotatably attached to the apparatus body 12 by the interlocking mechanism 40. It is set as the structure which can be made.
[Selection] Figure 2

Description

  The present invention relates to an optical fiber cutting device configured to cut an optical fiber by bringing a blade into contact with the optical fiber in a state where the optical fiber is positioned on the apparatus main body.

  In recent years, there have been increased opportunities to assemble optical fiber connectors by construction on site (for example, offices and general homes).

  For this reason, as an optical fiber cutting device, an optical fiber cutting device configured to be capable of easily cutting an optical fiber manually has been developed as described in, for example, “Patent Document 1”.

  On the other hand, “Patent Document 2” describes a method of cutting an optical fiber in a state where the optical fiber is bent between both clamp units after the optical fiber is clamped by a pair of clamp units on both sides of the cutting position. Has been.

  Further, in “Patent Document 3”, an optical fiber cutting device configured to simultaneously apply bending and tension to an optical fiber after the optical fiber is clamped by a pair of clamp units on both sides of the cutting position. Is described.

JP 2009-244403 A Japanese Patent Laid-Open No. 5-203813 Special Table 2002-515141

  In an optical fiber cutting device configured as a hand tool as described in “Patent Document 1”, if an optical fiber cutting method as described in “Patent Document 2” is employed, an optical fiber Can be inclined with respect to the axis orthogonal plane (that is, a plane orthogonal to the axial direction of the optical fiber). Thus, retroreflected light at the cut surface of the optical fiber can be reduced, and adverse effects on the laser light source can be effectively suppressed.

  However, when the optical fiber is cut, the tension applied to the optical fiber is not stabilized simply by clamping and bending the optical fiber, and the cut surface is stably formed at a predetermined inclination angle with respect to the axis perpendicular to the axis. It is difficult to do.

  In this regard, if the optical fiber cutting device described in the above-mentioned “Patent Document 3” is configured to apply tension along with bending after clamping the optical fiber, the cut surface is stable at a predetermined inclination angle. It becomes easy to form.

  However, the optical fiber cutting device described in “Patent Document 3” has a configuration in which bending and tension are simultaneously applied to the optical fiber. It is difficult to set the generated tensile stresses to optimum values. For this reason, it is still insufficient to stably form the cut surface of the optical fiber at a predetermined inclination angle.

  On the other hand, if the optical fiber is clamped and bent and then tension is applied in this state, the bending stress and the tensile stress can be set to optimum values, respectively. It is possible to stably form the cut surface at a predetermined inclination angle.

  However, in this case, as an operation for cutting the optical fiber, after clamping and bending the optical fiber, tension is applied to the optical fiber, and in this state, the blade is moved to the optical fiber. It is necessary to abut. For this reason, in the optical fiber cutting device configured as a hand tool, there is a problem that it is not easy to cut the optical fiber by a simple operation.

  The present invention has been made in view of such circumstances, and is configured to cut the optical fiber by bringing the blade into contact with the optical fiber in a state where the optical fiber is positioned in the apparatus main body. An object of the optical fiber cutting device is to provide an optical fiber cutting device capable of stably forming a cut surface of an optical fiber at a predetermined inclination angle with respect to an axis perpendicular to the axis by a simple operation. is there.

  The present invention has a configuration including a plurality of types of mechanisms that perform a plurality of operations necessary to stably form a cut surface of an optical fiber at a predetermined inclination angle with respect to an axis orthogonal to the axis. The above-described object can be achieved by providing an interlocking mechanism that sequentially performs the operation of a plurality of types of mechanisms in conjunction with the movement operation of the moving member in a predetermined direction.

That is, the optical fiber cutting device according to the present invention is
In an optical fiber cutting device configured to cut the optical fiber by bringing a blade into contact with the optical fiber in a state where the optical fiber is positioned in the apparatus main body,
A pair of clamping units for clamping the optical fiber on both sides of the cutting position;
A bending mechanism for bending the optical fiber between the clamp units;
A tension applying mechanism for applying tension to the optical fiber between the clamp units;
A blade moving mechanism for moving the blade from the retracted position to the contact position with the optical fiber;
A moving member movably attached to the apparatus body;
The clamping operation by both of the clamp units, the deflection applying operation by the bending applying mechanism, the tension applying operation by the tension applying mechanism, and the blade moving operation by the blade moving mechanism are interlocked with the moving operation of the moving member in a predetermined direction. And an interlocking mechanism that is sequentially performed.

  The above-mentioned “moving member” is not particularly limited as long as it is a member that is movably attached to the apparatus body. For example, the moving member reciprocates linearly such as a push button or a slide lever. A member or a rotating member such as a rotating lever or a dial can be used, and the direction of linear reciprocation and the direction of the rotation axis are not particularly limited. . Further, the movement operation of the “moving member” may be performed manually or automatically by a switch operation or the like.

  As long as the “predetermined direction” is a direction in which the moving member can move, the specific direction is not particularly limited.

  If the “interlocking mechanism” is configured to sequentially perform the clamping operation, the bending applying operation, the tension applying operation, and the blade moving operation in conjunction with the moving operation of the moving member in the predetermined direction, A specific configuration is not particularly limited.

  As shown in the above configuration, the optical fiber cutting device according to the present invention includes an optical fiber clamping operation by a pair of clamping units, a bending applying operation to the optical fiber by a bending applying mechanism, and a tension to the optical fiber by a tension applying mechanism. The applying operation and the blade moving operation up to the contact position with the optical fiber by the blade moving mechanism are sequentially performed in conjunction with the moving operation in a predetermined direction of the moving member movably attached to the apparatus main body by the interlocking mechanism. Since it is the structure to perform, the following effects can be obtained.

  That is, after bending an optical fiber clamped by a pair of clamp units, tension is applied to the optical fiber between both clamp units, so that bending stress and tensile stress generated in the optical fiber are respectively An optimal value can be set. In this state, since the optical fiber is cut by the blade, the cut surface of the optical fiber can be stably formed at a predetermined inclination angle with respect to the axis perpendicular to the axis.

  At this time, the interlocking mechanism is configured to sequentially perform the clamping operation, the bending applying operation, the tension applying operation, and the blade moving operation in conjunction with the moving operation of the moving member in the predetermined direction. The optical fiber can be cut.

  As described above, according to the present invention, in the optical fiber cutting device configured to cut the optical fiber by bringing the blade into contact with the optical fiber in a state where the optical fiber is positioned on the device main body, simple operation is performed. Thus, the cut surface of the optical fiber can be stably formed at a predetermined inclination angle with respect to the axis orthogonal plane.

  In the above configuration, if the interlocking mechanism is configured to release the clamping operation by both clamp units until the moving operation of the moving member in the predetermined direction is completed, the optical fiber can be removed from the apparatus body at an early stage. Is possible. As a result, there is no risk of inadvertently damaging the optical fiber, and the efficiency of cutting the optical fiber can be increased.

  In the above configuration, the moving member is configured as an operating lever that rotates outside the apparatus main body, and the moving operation of the moving member in the predetermined direction is performed by rotating the operating lever from the open position to the closed position. If it is set as the structure to perform, the operativity at the time of cut | disconnecting an optical fiber can be improved.

  In the above configuration, the pair of clamp units is configured to extend substantially parallel to each other in a direction substantially orthogonal to the optical fiber insertion path, and each clamp unit is attached to the support member and the support member. The movable block is configured to include a fixed block that is fixed and a movable block that is supported so as to be relatively movable in a direction substantially orthogonal to the insertion path of the optical fiber with respect to the support member. If the configuration is such that the optical fiber can be moved between a clamp position for clamping the optical fiber by the fixing block and a clamp release position for releasing the clamp, the optical fiber can be reliably clamped.

  At that time, as a tension applying mechanism, the clamp unit located on the distal end side of the optical fiber of the pair of clamp units is rotated around an axis extending in a direction substantially orthogonal to the optical fiber insertion path at the end of the support member. Thus, if the configuration is such that tension is applied to the optical fiber, an appropriate tension can be applied to the optical fiber with a simple configuration.

  In the above configuration, the anvil is provided with an anvil configured to be able to rotate between two positions around an axis extending in a direction substantially orthogonal to the optical fiber insertion path as the bending imparting mechanism. If the optical fiber is rotated in the predetermined direction around the axis to be in contact with the optical fiber at two locations and bent in an S shape, the optical fiber cutting operation is repeated many times. However, it is possible to stably impart the deflection to the optical fiber. This makes it easier to stably form the cut surface of the optical fiber at a predetermined inclination angle with respect to the axis perpendicular to the axis.

  At this time, the bending imparting mechanism includes a positioning member that abuts against the anvil and positions the anvil at the abutment position when the anvil rotates to the abutment position that abuts the optical fiber at two locations. Thus, the amount of bending of the optical fiber can be accurately managed.

  In the above configuration, the body side roller supported by the apparatus main body so as to be positioned in the vicinity of the distal end portion of the optical fiber positioned in the apparatus main body, and the movement operation of the moving member in the predetermined direction, A moving member side roller that is in contact with the main body side roller and sandwiches the tip of the optical fiber with the main body side roller is provided, and the interlocking mechanism has a direction opposite to the predetermined direction of the moving member. If the configuration is such that the tip side cut piece of the optical fiber cut by the contact of the blade is discarded by rotating at least one of the main body side roller and the moving member side roller in conjunction with the movement operation to The tip of the optical fiber can be discarded efficiently.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the external appearance of the optical fiber cutting device which concerns on one Embodiment of this invention, Comprising: (a) is a top view, (b), (c), (d) is b direction of (a), c direction, d direction view FIG. 1 is a view similar to FIG. 1A showing the main part of the optical fiber cutting device with the operation lever and the like removed. FIG. 1 is a view similar to FIG. 1B, showing the main part of the optical fiber cutting device with the operation lever and the like removed. The top view which shows the cutting process of the optical fiber by the said optical fiber cutting device Part V detailed view of FIG. 4 (e) Detailed view of VI section in Fig. 5 Timing chart showing operation sequence of each mechanism in optical fiber cutting device Partial cross-sectional plan view showing a main shaft and its peripheral structure constituting the main part of the interlocking mechanism in the optical fiber cutting device The figure which shows the principal part of the discard mechanism in the said optical fiber cutting device, and the interlocking mechanism relevant to this The figure which shows the principal part of the clamp drive mechanism in the said optical fiber cutting device, and the interlocking mechanism relevant to this The top view which shows the state of the displacement of the clamp slider and each movable block by the closing operation of the operation lever in the said optical fiber cutting device, and opening operation, and the position change of an upper opening / closing cam and a lower opening / closing cam The figure which shows the principal part of the bending | flexion provision mechanism in the said optical fiber cutting device, and the interlocking mechanism relevant to this The top view which shows the mode of the displacement of the anvil, the upper anvil cam, and the lower anvil cam by the closing operation of the operation lever in the said optical fiber cutting device The figure which shows the tension provision mechanism in the said optical fiber cutting device The figure which shows the clamp position adjustment mechanism in the said optical fiber cutting device The figure which shows the principal part of the blade moving mechanism in the said optical fiber cutting device, and the interlocking mechanism relevant to this The figure which shows the principal part of the braid | blade lowering mechanism in the said optical fiber cutting device, and the interlocking mechanism relevant to this The figure for demonstrating the effect | action of the said blade lowering mechanism The figure which shows the principal part of the counter drive mechanism in the said optical fiber cutting device, and the interlocking mechanism relevant to this

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a view showing an appearance of an optical fiber cutting device 10 according to an embodiment of the present invention. FIG. 1 (a) is a plan view thereof, and FIG. 1 (b), FIG. d) is a view in the direction of arrow b, c, and d in FIG.

  As shown in the figure, an optical fiber cutting device 10 according to the present embodiment is supported so as to be rotatable about an apparatus main body 12 and an axis Ax1 extending in the horizontal direction at the upper end of the apparatus main body 12. The operation tool 14 is configured as a hand tool type optical fiber cutting device.

  At this time, the operation lever 14 is manually operated by the open position shown by the two-dot chain line in FIG. 2B (that is, the position where the opening angle from the upper surface of the apparatus main body 12 is as large as about 75 °) and the closed position ( That is, it is configured to be able to rotate between the position at which the opening angle from the upper surface of the apparatus main body 12 is 0 °.

  FIGS. 2 and 3 are views similar to FIGS. 1A and 1B, showing the main part of the optical fiber cutting device 10 with the operation lever 14 and the like removed.

  As shown also in these drawings, in the optical fiber cutting device 10 according to the present embodiment, the optical fiber 2 is positioned on the device main body 12, and the blade 20 is brought into contact with the optical fiber 2, whereby the optical fiber is cut. It is comprised so that 2 may be cut | disconnected. At that time, the optical fiber 2 is arranged in a state of extending in the horizontal direction orthogonal to the axis Ax1 when positioned in the apparatus main body 12.

  The optical fiber 2 has a configuration in which a coating 2B is applied to the core wire 2A. At that time, the end portion of the optical fiber 2 has the coating 2B removed over a predetermined length, and the core wire 2A is exposed. And this optical fiber 2 is hold | maintained at the fiber holder 100 in the part of the coating | coated 2B.

  The apparatus main body 12 includes a pair of clamp units 22A and 22B that clamp the optical fiber 2 on both sides of the cutting position (that is, the distal end side and the proximal end side of the optical fiber 2), and the optical fiber 2 in both clamp units 22A and 22B. Between a bend-providing mechanism 24 that bends in between, a tension-applying mechanism 26 that applies tension to the optical fiber 2 between the clamp units 22A and 22B, and a position where the blade 20 is retracted and a position where the blade 20 contacts the optical fiber 2. The moving blade moving mechanism 28 is housed in the housing 30.

  Furthermore, in the present embodiment, the discard mechanism 50 for discarding the tip-side cut piece of the optical fiber 2 cut by the contact of the blade 20 is also housed in the housing 30. In addition, a disposal box 38 for detaching the tip-side cut piece of the optical fiber 2 is detachably attached to the housing 30.

  In FIG. 2, for convenience of explanation, the pair of clamp units 22A and 22B are shown in a slightly simplified manner, and the deflection imparting mechanism 24 includes an anvil 34 and guide pins 36A, which are main components thereof. Only the position of the tension applying mechanism 26 and the blade moving mechanism 28 is indicated by a two-dot chain line (the details thereof will be described later).

  A holder mounting recess 30 a having a shape corresponding to the outer shape of the fiber holder 100 is formed in the casing 30 in the center in the width direction. The fiber holder 100 is positioned in the apparatus main body 12 by being fitted into the holder mounting recess 30 a of the housing 30. At that time, the distal end portion of the optical fiber 2 is inserted into the housing 30 through an insertion groove 30 b formed at the center position in the width direction of the housing 30. The path of the optical fiber 2 that is inserted into the housing 30 at this time is hereinafter referred to as a “fiber insertion path”.

  An inner cover 32 as shown in FIGS. 1A and 1B is attached to the upper surface of the housing 30. Then, the inner cover 32 allows the tip portion of the optical fiber 2 positioned in the apparatus body 12 via the fiber holder 100 to be paired with a pair of clamp units 22A and 22B, a deflection applying mechanism 24, and a tension applying mechanism 26. The blade moving mechanism 28 is covered.

  The operation lever 14 is configured as a lever member having a size that covers the inner cover 32 when it is rotated to the closed position.

  Each of the pair of clamp units 22A and 22B includes a fixed block 22f, a movable block 22m, and a support member 22s that supports them. At this time, in each of the clamp units 22A and 22B, the fixed block 22f is fixed to the support member 22s, while the movable block 22m is directed to the fixed block 22f by a pair of upper and lower tension springs 150 (see FIG. 14C). It has become an energized configuration. Further, the fixed block 22f and the movable block 22m of each of the clamp units 22A and 22B are made of a metal having a high hardness such as SUS (stainless steel), thereby giving a strong pressure contact force to the optical fiber 2 and high accuracy. High cutting operation is made possible.

  In each of these clamp units 22A and 22B, the movable block 22m releases the clamp of the optical fiber 2 with the movable block 22m and the fixed block 22f, and the clamp of the core wire 2A away from the fixed block 22f. The clamp release position to be taken can be taken. At that time, the clamp unit 22A located on the distal end side of the optical fiber 2 (hereinafter simply referred to as “fiber distal end side”) clamps the portion of the core wire 2A, and the proximal end side of the optical fiber 2 (hereinafter simply referred to as “fiber base”). The clamp unit 22B located on the “end side” is configured to clamp the tip portion of the covering 2B.

  The deflection applying mechanism 24 includes an anvil 34 and two guide pins 36A, 36B disposed between the pair of clamp units 22A, 22B.

  The anvil 34 is configured to be rotatable between two positions around an axis Ax2 extending in the vertical direction. When the anvil 34 is rotated counterclockwise to the retracted position, the anvil 34 is not in contact with the core 2A of the optical fiber 2 in the fiber insertion path. On the other hand, when the anvil 34 is rotated clockwise to the contact position, the optical fiber is not contacted. The two core wires 2A are brought into contact with each other at two locations, and are bent into an S shape.

  The two guide pins 36 </ b> A and 36 </ b> B are disposed in the vicinity of the fiber insertion path, thereby guiding the tip portion along the fiber insertion path when the optical fiber 2 is inserted into the housing 30. It is like that. Both guide pins 36A and 36B are configured to position the anvil 34 at each of the retracted position and the contact position.

  Of the pair of clamp units 22A and 22B, the clamp unit 22A located on the fiber distal end side is configured to be rotatable about an axis Ax3 extending in the vertical direction at the end on the fixed block 22f side. Then, the tension applying mechanism 26 rotates the clamp unit 22A by a predetermined angle from the position extending in parallel with the other clamp unit 22B to the front end side of the fiber, whereby the optical fiber 2 clamped by both the clamp units 22A and 22B. A tension is applied to the core wire 2A.

  In the present embodiment, the clamping operation by the pair of clamp units 22A and 22B, the deflection applying operation by the deflection applying mechanism 24, the tension applying operation by the tension applying mechanism 26, and the contact position of the blade 20 by the blade moving mechanism 28. Is moved in this order in an overlapping manner by an operation of rotating the operating lever 14 from the open position to the closed position (hereinafter referred to as “close operation”).

  And the interlocking mechanism 40 for implement | achieving this is provided in the apparatus main body 12. FIG. The interlocking mechanism 40 is further configured to release the clamping operation by the pair of clamping units 22A and 22B until the closing operation of the operation lever 14 is completed. In FIG. 2, only the arrangement of the interlocking mechanism 40 is indicated by a two-dot chain line (this will also be described in detail later).

  The discarding mechanism 50 closes the operation lever 14 and the main body side roller 52 disposed so as to be positioned near the lower end of the tip end of the core 2A with respect to the optical fiber 2 positioned in the apparatus main body 12. A lever side roller 54 that abuts on the main body side roller 52 and sandwiches the front end portion of the optical fiber 2 with the main body side roller 52 during operation is provided.

  In the discard mechanism 50, the interlock mechanism 40 operates in conjunction with the opening operation of the operation lever 14 (that is, the rotation operation in the direction opposite to the closing operation). That is, the main body side roller 52 of the disposal mechanism 50 is rotated by the opening operation of the operation lever 14, and the lever side roller 54 is also rotated following the rotation. As a result, the cutting piece on the tip side of the optical fiber 2 cut by the blade 20 is sent out to the tip side of the fiber and discarded in the disposal box 38.

  FIG. 4 is a plan view showing a cutting process of the optical fiber 2 by the optical fiber cutting device 10 according to the present embodiment.

  First, as shown in FIG. 2A, the tip portion of the optical fiber 2 is inserted into a gap between the fixed block 22f and the movable block 22m at the clamp release position in each of the pair of clamp units 22A and 22B. Let At this time, both the clamp units 22A and 22B are arranged in parallel to each other in the horizontal direction orthogonal to the fiber insertion path, and the anvil 34 of the deflection applying mechanism 24 is rotated counterclockwise to the retracted position. Furthermore, the blade 20 is retracted to the retracted position.

  Next, in this state, as shown in FIG. 6B, the movable block 22m of each clamp unit 22A, 22B is moved, and the optical fiber 2 is clamped by the movable block 22m and the fixed block 22f.

  Next, in this state, as shown in FIG. 5C, the anvil 34 is rotated clockwise to the contact position, and the core wire 2A of the optical fiber 2 is bent into an S shape.

  Next, in this state, as shown in FIG. 4D, the clamp unit 22A is rotated by a predetermined angle toward the fiber distal end side to apply tension to the core wire 2A of the optical fiber 2.

  Next, in this state, the core wire 2A is cut by advancing the blade 20 and contacting the core wire 2A of the optical fiber 2 as shown in FIG.

  Next, in this state, as shown in FIG. 5F, after the clamp unit 22A is rotated to the original position parallel to the clamp unit 22B, the movable block 22m of each clamp unit 22A, 22B is clamped. Move to the release position. Then, by the rotation of the main body side roller 52 and the lever side roller 54, the distal end side cut piece 2Aa of the core wire 2A of the optical fiber 2 cut by the blade 20 is sent to the front end side of the fiber and discarded.

  FIG. 5 is a detailed view of a portion V in FIG.

  As shown in the figure, of the two guide pins 36A and 36B in the deflection applying mechanism 24, the guide pin 36A is disposed on the fixed block 22f side with respect to the fiber insertion path and on the fiber proximal side with respect to the blade 20. In addition, the guide pin 36B is disposed on the movable block 22m side with respect to the fiber insertion path and on the fiber front end side with respect to the blade 20. Each of these guide pins 36A, 36B is formed as a small diameter portion 36Aa, 36Ba having a relatively small diameter at an intermediate portion with a predetermined vertical width centered on the height position of the fiber insertion path. The guide pins 36A and 36B are fixed to the housing 30 at the lower ends thereof.

  Moreover, as shown in the same figure, the anvil 34 of the bending | flexion provision mechanism 24 is comprised as a substantially cylindrical member centering on the axis line Ax2.

  At this time, the axis Ax2 serving as the rotation center of the anvil 34 is displaced slightly toward the fiber tip side than the blade 20 and slightly toward the fixed block 22f than the fiber insertion path.

  The anvil 34 has two anvil portions 34A and 34B formed on the upper surface thereof. At that time, the anvil portion 34A is formed so as to expand in a substantially fan shape at a central angle of about 90 ° toward the outer peripheral surface of the anvil 34 on the movable block 22m side with respect to the fiber insertion path and on the fiber base end side with respect to the axis Ax2. Has been. On the other hand, the anvil portion 34B is substantially fan-shaped at a central angle of about 70 ° toward the outer peripheral surface of the anvil 34 so as to include the axis Ax2 on the fixed block 22f side with respect to the fiber insertion path and on the fiber tip side with respect to the blade 20. It is formed to expand.

  General portions 34C other than the two anvil portions 34A and 34B on the upper surface of the anvil 34 are formed in steps lower than the two anvil portions 34A and 34B. Two elongated holes 34a and 34b extending in an arc shape with the axis Ax2 as the center are formed at two locations that are diagonally separated in the general portion 34C. The guide pins 36A and 36B are inserted upward in the long holes 34a and 34b.

  When the anvil 34 is rotated clockwise to the contact position, the end faces on the counterclockwise side of the long holes 34a and 34b are in contact with the guide pins 36A and 36B, and are positioned at the contact positions. (See FIG. 4 (c)) On the other hand, when the counterclockwise rotation to the retracted position, the end faces on the clockwise side of the long holes 34a, 34b come into contact with the guide pins 36A, 36B, and the retracted position. (Refer to FIG. 4A).

  FIG. 6 is a detailed view of the VI part of FIG.

  As shown in the figure, the anvil portion 34A is formed as a protruding portion 34Aa1 in which the end region on the fiber tip side of the end surface 34Aa on the clockwise side protrudes in a substantially trapezoidal shape. The anvil portion 34B is formed as a protruding portion 34Ba1 in which the end region on the fiber proximal side of the clockwise end surface 34Ba protrudes in a substantially wedge shape.

  The protrusion 34Aa1 of the anvil part 34A and the protrusion 34Ba1 of the anvil part 34B are optical fibers at two positions separated in the direction along the fiber insertion path when the anvil 34 rotates clockwise to the contact position. The two core wires 2A are in contact with each other and pressed in the opposite directions toward the horizontal direction perpendicular to the fiber insertion path. At this time, since the core wire 2A of the optical fiber 2 is clamped by the pair of clamp units 22A and 22B, it bends in an S shape.

  The blade 20 includes a blade body 20A and a body support plate 20B that supports the blade body 20A.

  The blade body 20A includes a cutting tip 20A1 made of diamond and a tip support member 20A2 that supports the tip 20A1. At that time, the tip support member 20A2 is configured as a plate-like member extending along the vertical surface, and the cutting tip 20A1 is about 3 mm in the vertical direction along the end surface of the tip support member 20A2 on the fiber insertion path side. It is configured as a wedge-shaped member extending in the length of

  This blade main body 20A has its tip 20A1a, which is the cutting edge of the cutting tip 20A1, positioned in a slightly rear side (that is, the side away from the fiber insertion path) from the front end surface 20Ba of the main body support plate 20B. The chip support member 20A2 is fixed to the main body support plate 20B by adhesion.

  The front end surface 20Ba of the main body support plate 20B is formed as a concave portion 20Ba1 having an intermediate portion with a predetermined vertical width centered on the height position of the fiber insertion path, which is recessed rearward, whereby the core 2A of the optical fiber 2 is formed. (See FIG. 16C).

  In FIG. 6, the core wire 2A of the optical fiber 2 is bent in an S-shape so as to move away from the cutting tip 20A1 from the right side to the left side of the cutting tip 20A1. The tip 20A1a of the cutting tip 20A1 comes into contact with the axis orthogonal to the core wire 2A in a direction inclined slightly to the left. When the blade 20 further advances from this state, the core wire 2A is cut, and the cut surface is along a plane inclined slightly to the right with respect to the axis orthogonal to the core wire 2A, as indicated by a two-dot chain line in FIG. It will be a thing.

  When the tip 20A1a of the cutting tip 20A1 advances to a contact position with the core wire 2A of the optical fiber 2, the blade 20 has the tip surface 20Ba of the main body support plate 20B at the protruding portion 34Aa1 of the end surface 34Aa in the anvil portion 34A. When the blade 20 moves closer and further advances, the front end surface 20Ba of the main body support plate 20B comes into contact with the protrusion 34Aa1, and further advancement is restricted. As a result, the core wire 2A of the optical fiber 2 is not inadvertently overloaded.

  FIG. 7 is a timing chart showing an operation sequence of each mechanism in the optical fiber cutting device 10 according to the present embodiment.

  As shown in the figure, when the operation lever 14 is closed, the following operations are sequentially performed by the interlocking mechanism 40 in each mechanism.

  That is, first, as shown in FIG. 5A, the lever side roller 54 of the disposal mechanism 50 moves from the retracted position away from the main body side roller 52 to the abutting position where it abuts. At the same time, as shown in FIG. 5B, the movable block 22m of the pair of clamp units 22A and 22B moves from the clamp release position to the clamp position, and the optical fiber 2 is moved by the clamp units 22A and 22B. Clamp.

  When these operations are completed, the anvil 34 of the deflection applying mechanism 24 is rotated from the retracted position to the contact position, as shown in FIG. 3C, and the core wire 2A of the optical fiber 2 is bent in an S shape. .

  When this operation is completed, as shown in FIG. 4D, the tension applying mechanism 26 rotates one of the clamp units 22A toward the fiber distal end side to apply tension to the core 2A of the optical fiber 2.

  When this operation is completed, the blade 20 moves from the retracted position to the abutting position, and the core wire 2A of the optical fiber 2 is cut as shown in FIG. Although the tension is automatically released by cutting the core wire 2A, the clamp unit 22A quickly rotates to the original position after the cutting is completed.

  When the operation of rotating the clamp unit 22A to the original position is completed, the movable block 22m of the pair of clamp units 22A and 22B moves from the clamp position to the clamp release position as shown in FIG. Then, the clamp on the core wire 2A of the optical fiber 2 is released, and the closing operation of the operation lever 14 is completed at this point. The clamp release position when the closing operation is completed is set to a position where the distance between the movable block 22m and the fixed block 22f is slightly wider than the initial clamp release position (see FIG. 11D). .

  On the other hand, when the operation lever 14 is opened, the following operations are sequentially performed by the interlocking mechanism 40 in each mechanism.

  That is, first, as shown in FIG. 5F, the main body side roller 52 of the disposal mechanism 50 starts rotating in a state where it contacts the lever side roller 54. This rotation continues until the opening operation of the operation lever 14 is completed.

  As the operation lever 14 is opened, the movable block 22m of the pair of clamp units 22A and 22B is slightly wider than the clamp release position as shown in FIG. From the position to the clamp release position.

  Thereafter, as shown in FIG. 5E, the blade 20 moves from the contact position to the retracted position.

  Thereafter, as shown in FIG. 3C, the anvil 34 of the deflection imparting mechanism 24 rotates from the contact position to the retracted position.

  At the time of this rotation, the blade 20 is slightly lowered (this will be described later) as shown in FIG. 5G, and the counter is slightly rotated as shown in FIG. This will also be described later).

  When the rotation of the anvil 34 to the retracted position is completed, the lever-side roller 54 moves from the contact position to the retracted position as shown in FIG.

  Next, the detailed structure of each mechanism in the optical fiber cutting device 10 according to the present embodiment will be described.

  FIG. 8 is a partial cross-sectional plan view showing the main shaft 60 and the peripheral structure constituting the main part of the interlocking mechanism 40 in the optical fiber cutting device 10.

  As shown in the figure, the main shaft 60 extends along the axis Ax1, is rotatably supported by the casing 30 of the apparatus main body 12 at both ends in the axial direction, and is operated on both sides in the axial direction. It is connected to the lever 14.

  In the main shaft 60, the operation lever 14 is fixed to the main shaft 60, and a first lever 62 for rotating the main body side roller 52 of the disposal mechanism 50 and a pair of clamp units 22A and 22B are movable. The second lever 64 for moving the block 22m, the third lever 66 for rotating the anvil 34 of the deflection applying mechanism 24, and the lever side roller 54 of the disposal mechanism 50 between the contact position and the retracted position. And a cam 68 for moving the head is fixed.

  The main shaft 60 is provided with a torsion coil spring 70 for urging the operation lever 14 toward the open position. Accordingly, the closing operation of the operation lever 14 is performed by manually rotating the operation lever 14 against the elastic force of the torsion coil spring 70, while the opening operation is performed by the elastic force of the torsion coil spring 70. It is done automatically.

  At that time, the first lever 62, the cam 68, and the torsion coil spring 70 are disposed on the fixed block 22f side (see FIG. 2) from the center line in the width direction of the housing 30 (that is, from the fiber insertion path). The second lever 64 and the third lever 66 are disposed on the movable block 22m side (see FIG. 2) with respect to the center line in the width direction of the housing 30.

  FIG. 9 is a diagram showing a main part of the discarding mechanism 50 and the interlocking mechanism 40 related thereto.

  In this case, FIG. 8A is a plan view that is the same as FIG. 8, and FIG. 6B is a plan view showing a portion of the interlocking mechanism 40 that is connected to the first lever 62 in an expanded manner. FIG. 4C is a cross-sectional view taken along the line cc of FIG. 4A, and FIG. 4D is a cross-sectional view taken along the line dd of FIG. FIG. 4E is a diagram showing the main part of FIG. 4D in a state where the operation lever 14 is in the closed position.

  As shown in FIGS. 5B, 5C, and 5D, the main body side roller 52 of the discard mechanism 50 is inserted into the fiber member 74 below the main shaft 60 with respect to the frame member 74 fixed to the housing 30. It is supported so as to be rotatable about an axis Ax4 extending in the horizontal direction perpendicular to the path.

  On the other hand, as shown in FIGS. 4A, 4B, and 4D, the lever side roller 54 of the disposal mechanism 50 is rotatably supported by the roller support member 72 in the vicinity below the main shaft 60. . The roller support member 72 is rotatably supported by the frame member 74. At this time, a torsion coil spring 76 for urging the lever side roller 54 toward the contact position with the main body side roller 52 is attached to the roller support member 72. Further, the roller support member 72 is formed with a protrusion 72 a that can be engaged with the cam 68.

  As shown in FIGS. 4A and 4C, the first lever 62 has a configuration in which a bracket 62B is fixed to the sector gear 62A, and is screwed and fixed to the operation lever 14 at the bracket 62B. Yes.

  Further, as shown in FIGS. 7B and 7C, the sector gear 62A of the first lever 62 is rotated by the main body side roller 52 via a reduction gear train 80 provided with a one-way clutch (not shown). It is connected to a gear 82 fixed to the main body side roller 52 in a state of being arranged on the axis Ax4. Thus, only when the operation lever 14 is opened, the main body side roller 52 is rotated counterclockwise in FIG.

  As shown in FIG. 4D, when the operation lever 14 is rotated to the vicinity of the open position by the opening operation, the roller support member 72 is rotated upward with the projection 72a abutting against the cam 68, Thus, the lever side roller 54 is moved to a retracted position away from the main body side roller 52. On the other hand, as shown in FIG. 5E, when the operation lever 14 is in a position other than the open position and the vicinity thereof, the roller support member 72 has its protrusion 72a moved away from the cam 68 and rotated downward. Thus, the lever side roller 54 is brought into contact with the main body side roller 52.

  As shown in FIG. 4D, a clamp release pin 14a (which will be described later) is provided at a predetermined position on the inner surface of the operation lever 14.

  FIG. 10 is a diagram illustrating a main part of the clamp driving mechanism 18 for driving the pair of clamp units 22A and 22B and the interlocking mechanism 40 related thereto.

  In this case, FIG. 10A is a plan view showing a developed portion of the interlocking mechanism 40 connected to the second lever 64, and FIG. 10B is a direction b arrow in FIG. FIG. 3C is a cross-sectional enlarged view taken along line cc of FIG. Further, FIG. 4D is a view similar to FIG. 1A, showing the presser lever 112 added, and FIG. 4E is an enlarged view of the direction of arrow e in FIG. is there. In FIGS. 3C and 3E, an arrow “TOP” means that the direction of the arrow is the upper end side of the optical fiber cutting device 10 (the same applies hereinafter).

  As shown in FIGS. 4A and 4B, the second lever 64 is parallel to the fiber insertion path with respect to the housing 30 or the frame member 74 (hereinafter collectively referred to as “housing side member”). It is connected to a slider member 84 supported so as to be movable through a link member 86. The slider member 84 is connected to a cam support plate 92 that can rotate about an axis Ax5 extending in the vertical direction. As a result, the rotational movement of the second lever 64 is converted into a linear reciprocating movement in a direction parallel to the fiber insertion path of the slider member 84, and further converted into a rotational movement of the cam support plate 92. ing.

  The cam support plate 92 is formed in a disc shape, and an upper opening / closing cam 94 is fixed to the lower surface thereof. Further, below the upper opening / closing cam 94, a lower opening / closing cam 96 supported by the cam support plate 92 in a manner capable of rotating about the axis Ax5 independently of the upper opening / closing cam 94 is disposed. The lower opening / closing cam 96 is connected to the upper opening / closing cam 94 via a torsion coil spring (not shown), and is thereby urged clockwise with respect to the upper opening / closing cam 94 in plan view. The upper opening / closing cam 94 and the lower opening / closing cam 96 are formed so that the cam surface large diameter portion has the same size. A clamping slider 110 is disposed below the lower opening / closing cam 96.

  The clamp slider 110 is provided with a pin 110a protruding upward at a position farthest from the fiber insertion path. The clamp slider 110 engages with the upper opening / closing cam 94 and / or the lower opening / closing cam 96 at the pin 110a, thereby reciprocating linearly in the horizontal direction perpendicular to the fiber insertion path as a cam follower. In the clamp slider 110, a pair of long holes 110b extending in the horizontal direction perpendicular to the fiber insertion path is formed in the pair of side wall portions.

  The movable block 22m of the pair of clamp units 22A and 22B is provided with a pair of pins 22m1 protruding so as to face each other along a direction parallel to the fiber insertion path. Each of these movable blocks 22m is engaged with each long hole 110b of the clamp slider 110 at its pin 22m1. At this time, since each of these movable blocks 22m is biased toward the clamp position, the clamp slider 110 is also biased in a direction approaching the fiber insertion path.

  As shown in FIGS. 4D and 4E, a holding lever 112 for moving the clamp slider 110 together with each movable block 22m in a direction away from the fiber insertion path is disposed above the cam support plate 92. ing.

  The presser lever 112 is supported so as to be rotatable about an axis Ax6 extending in a direction parallel to the fiber insertion path with respect to the housing side member. At this time, the presser lever 112 is urged upward by a torsion coil spring 114 attached to the rotating shaft. The presser lever 112 has a pair of pins 112 a that engage with a pair of protrusions 110 c formed on the clamp slider 110.

  When the operation lever 14 is rotated to the position immediately before the closed position by the closing operation, the clamp release pin 14a comes into contact with the presser lever 112 and is pressed downward, and the clamp slider 110 is pushed by the both pins 112a. By pressing in a direction away from the fiber insertion path, both movable blocks 22m are moved to a clamp release position (more precisely, a position slightly further away from both fixed blocks 22f than the clamp release position).

  As shown in FIG. 2A, a cam stopper 116 for restricting the rotation of the lower opening / closing cam 96 is disposed in the vicinity of the outer peripheral edges of the upper opening / closing cam 94 and the lower opening / closing cam 96. The cam stopper 116 is supported so as to be rotatable about an axis extending in the vertical direction with respect to the casing side member, and is biased toward the axis Ax5 by a spring (not shown).

  FIG. 11 is a plan view showing how the clamp slider 110 and each movable block 22m are displaced by closing and opening the operation lever 14 together with the positional changes of the upper opening / closing cam 94 and the lower opening / closing cam 96.

  In this case, FIG. 11A is a diagram showing a state when the operation lever 14 is in the open position, and FIG. 11D is a diagram showing a state when the operation lever 14 is in the closed position. FIGS. 4B and 4C are diagrams showing the state when the intermediate position is reached in stages. Moreover, FIG. (E) is a figure which shows the mode in the middle of the opening operation of the operation lever 14 being performed.

  As shown in FIG. 6A, when the operation lever 14 is in the open position, the pin 110a of the clamp slider 110 is engaged with the large cam surface diameter portion of the upper opening / closing cam 94, thereby allowing both movable blocks to move. 22m is located in the clamp release position. At this time, the lower opening / closing cam 96 is engaged with the pin 116a of the cam stopper 116 on the end face in the clockwise direction.

  From this state, when the operation lever 14 starts to rotate toward the closed position by the closing operation, the upper opening / closing cam 94 starts to rotate clockwise accordingly. At this time, the lower opening / closing cam 96 does not rotate because it is engaged with the pin 116a of the cam stopper 116.

  As shown in FIG. 5B, when the operation lever 14 is rotated slightly toward the closed position and the upper opening / closing cam 94 is rotated slightly clockwise, the pin 110a of the clamp slider 110 is moved to the upper opening / closing cam. The movable block 22m moves together with the clamp slider 110 to the clamp position. At this time, the lower opening / closing cam 96 comes into contact with the pin 110a of the clamp slider 110 on the cam inclined surface, and slightly rotates counterclockwise.

  As shown in FIG. 5C, when the operation lever 14 is further rotated toward the closed position and the upper opening / closing cam 94 is further rotated clockwise, the pin 116a of the cam stopper 116 is moved to the cam of the upper opening / closing cam 94. It will be in the state mounted on the surface large diameter part. Then, when the operation lever 14 is rotated close to the closed position, as shown in FIG. 10E, the clamp release pin 14a comes into contact with the presser lever 112, and the presser lever 112 is rotated downward. The clamp slider 110 that engages with the presser lever 112 moves in a direction away from the fiber insertion path, and both the movable blocks 22m move further to the position farther from the both fixed blocks 22f than the clamp release position. As a result, the lower opening / closing cam 96 is released from the engagement with the pin 116a of the cam stopper 116 and the pin 110a of the clamp slider 110, and rotates clockwise.

  As shown in FIG. 4D, the lower opening / closing cam 96 rotated clockwise is at a position where the projection 96a protruding from the large diameter portion of the cam surface is in contact with the pin 110a of the clamp slider 110. Stop turning.

  In FIG. 10C, the movable slider 22m is moved to a position further away from the fixed blocks 22f than the clamp release position shown in FIG. The pin 110a of 110 is moved from the position shown in FIG. 5B to a position away from the large diameter portions of the upper opening / closing cam 94 and the lower opening / closing cam 96, whereby the subsequent lower opening / closing cam 96 rotates clockwise. This is to make the rotation smoothly. The amount of movement from the clamp release position to a position further away from both fixed blocks 22f can be adjusted by the downward rotation amount of the presser lever 112 by the clamp release pin 14a.

  Thereafter, as shown in FIG. 5E, when the operation lever 14 is rotated from the closed position to the open position by the opening operation, the upper opening / closing cam 94 is rotated counterclockwise. The lower opening / closing cam 96 biased around does not rotate. At this time, since the pin 110a of the clamp slider 110 is in a position in contact with the large-diameter portion of the lower opening / closing cam 96, the upper opening / closing cam 94 is smoothly rotated counterclockwise. During this rotation, the pin 94a protruding downward from the upper opening / closing cam 94 comes into contact with the end face of the lower opening / closing cam 96 in the clockwise direction, whereby the upper opening / closing cam 94 and the lower opening / closing cam 96 thereafter. And rotate together counterclockwise.

  And when it rotates to the angle position shown to the figure (a), the pin 116a of the cam stopper 116 will again engage with the clockwise end surface of the lower opening-and-closing cam 96, and it will return to an initial state.

  FIG. 12 is a diagram showing a main part of the deflection applying mechanism 24 and the interlocking mechanism 40 related thereto.

  In this case, FIG. 10A is a plan view showing a developed portion of the interlocking mechanism 40 connected to the third lever 66, and FIG. 10B is a direction b arrow in FIG. FIG. 3C is a development view taken in the direction of the arrow c in FIG.

  As shown in FIGS. 4A and 4B, the third lever 66 is supported by a slider member 122 supported by a housing side member so as to be movable in a direction parallel to the fiber insertion path via a lever member 124. It is connected. The lever member 124 is supported at an intermediate portion thereof so as to be rotatable about an axis Ax7 extending in a horizontal direction perpendicular to the fiber insertion path with respect to the housing side member. The slider member 122 is connected to a cam follower 126 that can rotate about an axis Ax8 extending in the vertical direction. As a result, the rotational movement of the third lever 66 is converted into a linear reciprocating movement in a direction parallel to the fiber insertion path of the slider member 122, and further converted into a rotational movement of the cam follower 126.

  This cam follower 126 is connected via a gear 128 to a gear 130 disposed on an axis Ax2 that is the center of rotation of the anvil 34. On the axis Ax2, a lower anvil cam 132 formed integrally with the gear 130 is disposed above the gear 130. Further, an upper anvil cam 136 is disposed above the lower anvil cam 132 via a torsion coil spring 134. Is arranged. The upper anvil cam 136 is fixed to a central shaft member 138 that supports the anvil 34. On the other hand, the lower anvil cam 132 is supported so as to be rotatable with respect to the central shaft member 138. The central shaft member 138 is supported so as to be rotatable about the axis Ax2 with respect to the housing side member.

  FIG. 13 is a plan view showing how the anvil 34, the upper anvil cam 136, and the lower anvil cam 132 are displaced by closing the operation lever 14. FIG.

  In that case, the same figure (a1)-(a5) has shown the mode of the displacement of the anvil 34, The figure (b1)-(b5) has shown the mode of the displacement of the upper anvil cam 136 (a1)- (C1) to (c5) show the state of displacement of the lower anvil cam 132 in correspondence with (a1) to (a5).

  Before describing the state of these displacements, the peripheral structure will be described.

  As shown in FIG. 2C2, the torsion coil spring 134 is locked at both ends thereof by pins 136 a protruding downward from the upper anvil cam 136 and pins 132 a protruding upward from the lower anvil cam 132. When the lower anvil cam 132 rotates relative to the upper anvil cam 136 in a clockwise direction, the torsion coil spring 134 causes an elastic force to rotate the lower anvil cam 132 counterclockwise. It has become.

  In the vicinity of the outer peripheral surface of the lower anvil cam 132, a tension applying lever 142 and a blade moving lever 144 are arranged as a cam follower. The tension applying lever 142 and the blade moving lever 144 are urged toward the lower anvil cam 132 by a spring (not shown).

  At this time, the tension applying lever 142 is in contact with the cam surface of the lower anvil cam 132 at the pin 142a at one end thereof, and rotates around the axis Ax9 extending in the vertical direction with respect to the casing side member at the intermediate portion. Supported as possible. The tension applying lever 142 is engaged with a member on the clamp unit 22A side at a flange 142b formed at the other end (see FIG. 14B).

  The blade moving lever 144 is in contact with the cam surface of the lower anvil cam 132 at the pin 144a at one end thereof, and rotates around the axis Ax10 extending in the vertical direction with respect to the casing side member at the other end. Supported as possible. The blade moving lever 144 is engaged with a member on the blade 20 side at the pin 144a (see FIG. 16A).

  As shown in FIG. 4 (a1), when the operation lever 14 is in the open position, the anvil 34 is located in the retracted position (see FIG. 4 (a)). As shown, the upper anvil cam 136 is also engaged with the fixing pin 140 protruding from the housing side member at the counterclockwise end face, and only the clockwise rotation is allowed.

  When the operation lever 14 is rotated from this state toward the closed position, the lower anvil cam 132 is rotated clockwise from the position shown in (c1) of the figure, and thereby the upper part connected via the torsion coil spring 134. The anvil cam 136 is also rotated clockwise while maintaining a positional relationship with the lower anvil cam 132, and the anvil 34 fixed thereto is also rotated clockwise.

  Then, when the operating lever 14 is rotated about 20 ° from the open position and the rotating lower anvil cam 132 is rotated clockwise to the position shown in FIG. 2C2, as shown in FIG. In the anvil 34, the guide pins 36A and 36B are brought into contact with the end faces of the long holes 34a and 34b in the clockwise direction, and at this time, the core wire 2A of the optical fiber 2 is bent into an S shape (see FIG. 4C). ).

  Even if the operation lever 14 is rotated further toward the closed position, the anvil 34 does not rotate, and the upper anvil cam 136 fixed to the anvil 34 does not rotate any more, but the lower anvil cam 132 is provided with the torsion coil spring 134. It further rotates clockwise while resisting the elastic force.

  Then, when the operation lever 14 is rotated about 40 ° from the open position and the lower anvil cam 132 is rotated clockwise to the position shown in FIG. To turn. Then, the tension applying lever 142 rotates the clamp unit 22A toward the fiber distal end side by a predetermined angle at the flange portion 142b, thereby applying tension to the core wire 2A of the optical fiber 2 (see FIG. 4D).

  Further, when the operation lever 14 is rotated about 55 ° from the open position and the lower anvil cam 132 is rotated clockwise to the position shown in FIG. 4C4, the blade moving lever 144 is rotated in the direction indicated by the arrow. Then, the blade 20 is advanced (see FIG. 4E).

  Then, when the operation lever 14 is rotated to the closed position and the lower anvil cam 132 is rotated clockwise to the position shown in FIG. 5C5, the tension adding lever 142 is rotated in the reverse direction, and the clamp unit 22A. Is returned to its original position.

  FIG. 14 is a view showing the tension applying mechanism 26 together with a pair of clamp units 22A and 22B.

  In that case, the same figure (a) is a top view which shows these, the same figure (b) is a b direction arrow directional view of the same figure (a), and the same figure (c) is the same figure (a). FIG.

  As shown in FIG. 5A, of the pair of clamp units 22A and 22B, the clamp unit 22A located on the fiber tip side is directed downward to the end of the support member 22s on the movable block 22m side. Thus, a protruding member 152 protruding in a pin shape is fixed. Then, as shown in FIG. 5B, the clamp unit 22A is configured to abut on the flange member 142b of the tension applying lever 142 from the fiber proximal end side in the protruding member 152.

  In addition, one end of a tension spring 154 is attached to the end of the support member 22s on the movable block 22m side of the clamp unit 22A. The tension spring 154 is disposed so as to extend toward the fiber tip side along the fiber insertion path, and the other end is attached to the upper end of the lever member 156. The lever member 156 is supported at the intermediate portion thereof so as to be rotatable about an axis extending in the horizontal direction perpendicular to the fiber insertion path with respect to the housing side member.

  The clamp unit 22A is urged toward the fiber tip side by the elastic force of the tension spring 154. Since the projection member 152 is in contact with the flange portion 142b of the tension applying lever 142, the clamp unit 22A moves toward the fiber tip side. Is regulated. When the tension applying lever 142 is rotated toward the fiber tip side, the clamp unit 22A is also rotated toward the fiber tip side together with the tension adding lever 142 by the elastic force of the tension spring 154, whereby tension is applied to the core 2A of the optical fiber 2. Is supposed to be granted.

  The lever member 156 is connected to the housing side member via an adjustment screw 158 at the lower end thereof. The adjustment screw 158 is for adjusting the distance in the direction along the fiber insertion path between the lower end portion of the lever member 156 and the housing side member. By adjusting the initial value of the tension of the tension spring 154 with the adjusting screw 158, the tension applied to the core wire 2A of the optical fiber 2 is adjusted to an appropriate value.

  The optical fiber cutting device 10 according to the present embodiment includes a clamp position adjusting mechanism 160 as shown in FIG.

  The clamp position adjusting mechanism 160 is for appropriately clamping the tip portion of the coating 2B to two types of optical fibers 2 having different outer diameters.

  In this case, FIG. 14A is a view similar to FIG. 14A showing the clamp position adjusting mechanism 160 at the small diameter corresponding position together with a pair of clamp units 22A and 22B, and FIG. FIG. 6 is a view substantially similar to FIG. 5A showing the clamp position adjusting mechanism 160 at the large diameter corresponding position.

  As shown in the figure, the fixed block 22f of each clamp unit 22A, 22B is fixed to the support member 22s. At this time, the clamp unit 22B located on the fiber proximal end side of the fixed block 22f The fixed position can be adjusted in two stages with respect to the horizontal direction orthogonal to the fiber insertion path by the clamp position adjusting mechanism 160. As a result, two types of optical fibers 2 (for example, an optical fiber in which the outer diameter of the coating 2B portion is set to φ0.25 mm and an optical fiber in which the outer diameter of the coating 2B portion is set to φ0.9 mm) are used. On the other hand, it is the structure which can clamp the front-end | tip part of the coating | coated 2B appropriately.

  The clamp position adjusting mechanism 160 includes a slider 162 coupled to the fixed block 22f of the clamp unit 22B and a linear cam 164 that engages with the slider 162.

  The slider 162 is configured to be able to move in the horizontal direction perpendicular to the fiber insertion path while being engaged with the fixing pin 166 protruding upward from the casing side member in the vicinity of the clamp unit 22B. At this time, the slider 162 is biased in a direction approaching the linear cam 164 by a tension spring 150 (see FIG. 14C). A pin 162a protruding downward is provided at the end of the slider 162 on the movable block 22m side, and the pin 162a is engaged with the cam surface of the linear cam 164.

  The linear cam 164 is supported so as to be movable in the direction along the fiber insertion path with respect to the housing side member in the vicinity of the end of the clamp unit 22B on the movable block 22m side. At this time, the linear cam 164 is fixed to a change-over switch 170 (see FIG. 2) disposed on the upper surface of the housing 30, and is moved by a slide operation of the change-over switch 170. It has become.

  As shown in FIG. 6A, in the state where the linear motion cam 164 moves to the fiber proximal end side, the pin 162a of the slider 162 abuts against the cam surface inclined portion 164a of the linear motion cam 164, thereby fixing the fixed block. 22f is positioned at a position corresponding to the small diameter, whereby the tip portion of the coating 2B in the small diameter optical fiber 2 can be appropriately clamped. On the other hand, as shown in FIG. 5B, in the state where the linear motion cam 164 moves to the fiber tip side, the pin 162a of the slider 162 gets over the apex of the cam surface inclined portion 164a of the linear motion cam 164 and the cam surface is flat. The fixed block 22f is positioned at the position corresponding to the large diameter in contact with the portion 164b, so that the tip portion of the coating 2B in the large diameter optical fiber 2 can be appropriately clamped.

  FIG. 16 is a diagram showing a main part of the blade moving mechanism 28 and the interlocking mechanism 40 related thereto.

  In this case, FIG. 10A is a side view showing these as viewed from the fiber tip side, and FIG. 14B is a view in the direction of arrow b in FIG. These are the c section detail drawing of the figure (a).

  As shown in FIGS. 6A and 6B, the blade moving mechanism 28 has a configuration in which a blade moving lever 144 (see FIG. 13C4) is engaged with the blade 20 via a lever member 182. ing.

  At that time, the lever member 182 is rotatable about an axis Ax11 extending in a direction along the fiber insertion path with respect to the lever support plate 184 arranged so as to extend along a vertical plane orthogonal to the fiber insertion path. It is supported.

  The lever member 182 is in contact with the pin 144a of the blade moving lever 144 at a flange portion 182a formed at the lower end thereof, and the main body support plate 20B of the blade 20 at the pin 182b provided at the upper end thereof. Is engaged with the notch 20Ba formed in the. Further, the lever member 182 is urged clockwise in FIG. 4A by a spring (not shown). Then, the lever member 182 rotates counterclockwise by moving the blade moving lever 144 in the right direction in FIG. 4A, and moves the blade 20 in the left direction, which is moved to the light. The fiber 2 is brought into contact with the core wire 2A.

  The blade 20 is detachably fixed to the blade support block 188 by screw tightening in the main body support plate 20B. The blade support block 188 is supported by the lever support plate 184 so as to be slidable in the horizontal direction perpendicular to the fiber insertion path on the upper surface of the flange portion 184a formed at the upper end thereof.

  The lever support plate 184 is supported so as to be movable in the vertical direction with respect to the casing side member. At this time, a long hole 184b extending in the vertical direction is formed in the lower end portion of the lever support plate 184, and a fixing pin 192 extending in the direction along the fiber insertion path from the housing side member is formed in the long hole 184b. Is engaged. A pin 184c extending in the direction along the fiber insertion path is provided on the upper portion of the lever support plate 184. The lever support plate 184 is biased downward by a tension spring 186 whose both ends are locked to the fixing pin 192 and the pin 184c.

  The lever support plate 184 lowers the blade so as to slightly displace the contact position of the tip 20A1a of the cutting tip 20A1 with the core 2A every time the blade 20 cuts the core 2A of the optical fiber 2. A part of the mechanism 210 is constituted.

  As shown in FIG. 2C, the main body support plate 20B of the blade 20 has a plurality of small holes 20Bb for applying an adhesive when fixing the blade main body 20A to the main body support plate 20B. Is formed.

  FIG. 17 is a diagram showing the main parts of the blade lowering mechanism 210 and the interlocking mechanism 40 related thereto.

  In that case, the figure (a) is a top view which shows the part connected with the bending | flexion provision mechanism 24 among the interlocking mechanisms 40, and the figure (b) is a b direction arrow expanded view of the figure (a). FIG. 4C is a view in the direction of arrow c in FIG.

  As shown in FIG. 5B, a one-way clutch 212 is attached to the lower end portion of the central shaft member 138 that supports the anvil 34 of the deflection imparting mechanism 24. The one-way clutch 212 is connected via a reduction gear train 214 and a worm gear 216 to a worm wheel 218 disposed on an axis Ax12 extending in the horizontal direction perpendicular to the fiber insertion path. At this time, the one-way clutch 212 is configured to transmit the power to the reduction gear train 214 only when the anvil 34 rotates from the contact position to the retracted position by opening the operation lever 14. (See FIG. 7 (g)).

  As shown in FIG. 5A, a lead screw 220 extending along the axis Ax12 is fixed to the worm wheel 218, and a lead nut 222 is screwed to the lead screw 220. The lead nut 222 is provided with a pin 222a that protrudes toward the fiber tip side. The lead nut 222 moves to the fixed block side along the lead screw 220 when the worm wheel 218 is rotated by power transmission from the one-way clutch 212. This movement is performed little by little every time the operation lever 14 is opened due to the presence of the reduction gear train 214.

  As shown in FIG. 5C, the lead nut 222 is connected to the horizontal slider 232 of the blade lowering mechanism 210 at its pin 222a.

  The horizontal slider 232 is disposed along a vertical plane orthogonal to the fiber insertion path. The horizontal slider 232 is formed in an approximately mountain shape, a long hole 232a extending in the horizontal direction is formed in the lower part, and a long hole 232b extending in the vertical direction is formed in the upper part. The horizontal slider 232 engages with a fixing pin 234 fixed to the housing side member so as to extend along the fiber insertion path in the long hole 232a.

  A fan-shaped lever 236 disposed along a vertical plane orthogonal to the fiber insertion path is fixed to the fixing pin 234 at a main portion of the lower end portion. A pair of pins 236a and 236b projecting toward the fiber tip side are provided at both ends of the sector lever 236 near the outer peripheral surface. The sector lever 236 is engaged with the long hole 232b of the horizontal slider 232 at the pin 236a on the movable block side, and is disposed along the vertical plane orthogonal to the fiber insertion path at the pin 236b on the fixed block side. The upper and lower sliders 238 are engaged with the long holes 238a.

  A long hole 238a of the vertical slider 238 extends short in the horizontal direction, and a long hole 238b extending in the vertical direction is formed in the vicinity of the long hole 238a. The upper and lower sliders 238 are engaged with a pair of upper and lower fixing pins 242 and 244 fixed to the housing side member so as to extend along the fiber insertion path in the long hole 238b.

  As a result, in the blade lowering mechanism 210, when the horizontal slider 232 moves together with the lead nut 222 toward the fixed block, the direction of movement is changed by the sector lever 236, and the upper and lower sliders 238 are lowered.

  FIG. 18 is a view for explaining the operation of the blade lowering mechanism 210.

  In this case, FIG. 17A is a diagram in which an update screw 246 is added to FIG. 17C, and FIGS. It is a figure which adds and shows the lever support plate 184 with respect to.

  As shown in FIG. 5A, an update screw 246 is supported on the flange portion 184a of the lever support plate 184. At this time, the renewal screw 246 is rotatable with respect to the flange portion 184a so that the screw portion protrudes downward with the head portion 246a placed on the flange portion 184a of the lever support plate 184. It is supported by. In addition, the upper and lower sliders 238 have a flange portion 238 c formed at the upper end thereof, and the flange portion 238 c is screwed with the screw portion 246 b of the update screw 246.

  As shown in FIG. 4B, the lever support plate 184 has two long holes 184d and 184e that extend in the vertical direction at positions corresponding to the long holes 238b of the vertical slider 238 at a predetermined interval in the vertical direction. Formed. The lever support plate 184 is engaged with the fixing pins 242 and 244 in the long holes 184d and 184e. At this time, the long hole 184d located on the upper side is shorter and squarer than the long hole 184e located on the lower side, so that when the lever support plate 184 moves in the vertical direction, Before the fixing pin 244 comes into contact with the end face, the fixing pin 242 comes into contact with the end face of the upper elongated hole 184d.

  The lever support plate 184 is in a state in which the fixing pin 242 is in contact with the lower end surface of the upper elongated hole 184d as shown in FIG. . At this time, the fan-shaped lever 236 is arranged so that the pair of pins 236a and 236b have the same height. Furthermore, at this time, the cutting tip 20A1 of the blade 20 is in a state of being disposed so as to contact the core wire 2A of the optical fiber 2 in the vicinity of the lower end of the pointed tip 20A1a.

  When the use of the optical fiber cutting device 10 is started, each time the core wire 2A of the optical fiber 2 is cut by the blade 20, the lead nut 222 is moved little by little toward the fixed block, and accordingly the horizontal slider 232 and The vertical slider 238 and the lever support plate 184 are slightly lowered through the sector lever 236, whereby the support position of the lever member 182 on the lever support plate 184 (that is, the position of the axis Ax11) is slightly displaced downward. As a result, the contact position of the cutting tip 20A1 of the blade 20 with the core wire 2A of the optical fiber 2 is displaced little by little (for example, by 0.14 μm) upward.

  Then, the cutting operation by the blade 20 is performed a predetermined number of times (for example, 20,000 times), and the fixing pin 242 comes into contact with the upper end surface of the upper long hole 184d in the lever support plate 184 as shown in FIG. When the lever support plate 184 is lowered to the position, the blade 20 is replaced with a new one, and the renewal screw 246 is adjusted so that the lever support plate 184 is used in the optical fiber cutting device 10 as shown in FIG. The position is raised to the start position (position shown in FIG. 4A). The adjustment of the update screw 246 is performed by turning the update screw 246 several times with a screwdriver until the fixing pin 242 contacts the lower end surface of the upper elongated hole 184d in the lever support plate 184.

  At this time, the vertical slider 238 is displaced downward from the position shown in FIG. Further, the sector lever 236 is rotated clockwise from the position shown in FIG. 5A by the adjustment amount of the update screw 246.

  Thereafter, a cutting operation by a new blade 20 is performed, and each time the cutting operation is performed a predetermined number of times (for example, 20,000 times), replacement of the blade 20 and adjustment of the update screw 246 are performed.

  When this updating operation is repeated a predetermined number of times (for example, 5 times), as shown in FIG. 4D, the vertical slider 238 has a cumulative displacement amount downward to a predetermined set value (for example, 10 mm). As a result, the fixing pin 242 comes into contact with the upper end surface of the long hole 238b, and the renewal screw 246 cannot be adjusted. At this time, the sector lever 236 is rotated 90 ° clockwise from the position shown in FIG. 6A, and the horizontal movement of the horizontal slider 232 cannot be converted into the downward movement of the vertical slider 238. It becomes. As a result, the operator can recognize that the optical fiber cutting device 10 has reached its mechanical life by, for example, 100,000 cutting operations.

  FIG. 19 is a diagram showing a main part of the counter driving mechanism 250 and the interlocking mechanism 40 related thereto.

  In that case, the figure (a) is a top view which shows these, The figure (b) is a b direction arrow expanded view of the figure (a). Moreover, the figure (c) is a c direction arrow line view of the figure (a), the figure figure (d) is a d direction arrow line view of the figure (a).

  As shown in FIG. 5A, a gear 252 is integrally formed on a worm wheel 218 disposed on the axis Ax12. This gear 252 is connected via a reduction gear train 254 to a gear 258 fixed to a shaft 256 that is rotatably supported about an axis Ax13 extending in the horizontal direction orthogonal to the fiber insertion path.

  On the other hand, as shown in FIG. 4D, a display window 30c is formed on the upper surface of the housing 30 (see FIG. 2). Below the display window 30c, a counter 260 is disposed that is supported so as to be rotatable about an axis extending in a horizontal direction perpendicular to the fiber insertion path with respect to the housing side member.

  The counter 260 includes a counter gear 260A and a gear cover 260B that is fixed to the counter gear 260A so as to cover the counter gear 260A over a substantially half circumference. The counter 260 is urged counterclockwise in FIG. 4D by a spring (not shown), and in the initial state, the clockwise end of the gear cover 260B is positioned near the lower portion of the display window 30c. It has become.

  On the outer peripheral surface of the gear cover 260B, a color band corresponding to the number of times the core wire 2A of the optical fiber 2 is cut by the blade 20 is provided. At this time, the color of the band is, for example, color-coded such that the band-like area on the clockwise side from the cutting start position is white, the band-like area having the number of cuts of 1 to 20,000 is yellow, and the band-like area of 20,000 or more is red. Has been made.

  As shown in FIG. 4D, a clutch lever 262 is rotatably supported on the shaft 256 in the vicinity of the gear 258. A clutch gear 264 that meshes with the gear 258 is rotatably supported by the clutch lever 262. At this time, the clutch gear 264 is arranged so as to be positioned near the lower side of the counter 260. The clutch lever 262 is urged clockwise in FIG. 4D by a tension spring 266, thereby engaging the clutch gear 264 with the counter gear 260 A of the counter 260.

  Then, when the anvil 34 shown in FIG. 4B is rotated from the contact position to the retracted position, and the worm wheel 218 is rotated via the one-way clutch 212 and the reduction gear train 214, the anvil 34 shown in FIG. The counter 260 is rotated clockwise through the reduction gear train 254, the gear 258, and the clutch gear 264. This rotation is performed little by little every time the operation lever 14 is opened due to the presence of the reduction gear trains 214 and 254, and thereby the position of the color band of the gear cover 260B displayed on the display window 30c is changed. It is designed to change very little by little. As a result, the operator can visually grasp the approximate number of times of cutting, and the blade 20 can be replaced at an appropriate time.

  As shown in FIG. 4D, a reset pin 270 that can abut on the tip of the clutch lever 262 from above is disposed in the upper portion of the housing 30. Further, a small hole 30d for pressing the reset pin 270 is formed in the vicinity of the display window 30c on the upper surface of the housing 30 (see FIG. 2). The clutch lever 262 rotates downward when the reset pin 270 is pressed, and thereby the meshing between the clutch gear 264 and the counter gear 260A of the counter 260 is released. Therefore, the counter 260 is caused by the elastic force of a spring (not shown). It rotates counterclockwise and returns to the initial position. As a result, when the operator replaces the blade 20, the operator can press the reset pin 270 to display the number of cuttings for the new blade 20 on the display window 30c.

  Next, the effect of this embodiment is demonstrated.

  The optical fiber cutting device 10 according to the present embodiment includes a clamp operation of the optical fiber 2 by the pair of clamp units 22A and 22B, a deflection applying operation to the optical fiber 2 by the deflection applying mechanism 24, and an optical fiber by the tension applying mechanism 26. An operation lever as a moving member that is attached to the apparatus main body 12 by the interlock mechanism 40 so that the tension applying operation to the blade 2 and the blade moving operation to the contact position with the optical fiber 2 by the blade moving mechanism 28 can be performed. Since it is configured to sequentially perform in conjunction with the closing operation 14, the following operational effects can be obtained.

  In other words, after the optical fiber 2 clamped by the pair of clamp units 22A and 22B is bent, tension is applied to the optical fiber 2 between the both clamp units 22A and 22B. The generated bending stress and tensile stress can be set to optimum values, respectively. In this state, since the optical fiber 2 is cut by the blade 20, the cut surface of the optical fiber 2 can be stably formed at a predetermined inclination angle with respect to the axis orthogonal plane.

  At that time, the interlocking mechanism 40 is configured to sequentially perform the clamping operation, the bending applying operation, the tension applying operation, and the blade moving operation in conjunction with the closing operation of the operation lever 14, so that the optical fiber can be easily operated. 2 can be cut.

  As described above, according to the present embodiment, the optical fiber cutting unit configured to cut the optical fiber 2 by bringing the blade 20 into contact with the optical fiber 2 while the optical fiber 2 is positioned on the apparatus main body 12. In the apparatus 10, the cut surface of the optical fiber 2 can be stably formed at a predetermined inclination angle with respect to the axis perpendicular to the axis by a simple operation.

  In the present embodiment, the pair of clamp units 22A and 22B are arranged so as to extend in parallel to each other in the horizontal direction orthogonal to the fiber insertion path, and each clamp unit 22A and 22B is connected to the support member 22s. The fixed block 22f fixed to the support member 22s and the movable block 22m supported relative to the support member 22s in the horizontal direction orthogonal to the fiber insertion path are configured. Since the movable block 22m can move between a clamp position where the movable block 22m and the fixed block 22f clamp the optical fiber 2, and a clamp release position where the clamp is released, the optical fiber 2 Can be reliably clamped.

  At this time, the tension applying mechanism 26 extends the clamp unit 22A located on the distal end side of the optical fiber 2 out of the pair of clamp units 22A and 22B in the vertical direction at the end of the support member 22s on the fixed block 22f side. Since it is configured to apply tension to the optical fiber 2 by rotating around Ax3, it is possible to apply appropriate tension to the optical fiber 2 with a simple configuration.

  In addition, in the present embodiment, the tension applied to the optical fiber 2 by the tension applying mechanism 26 can be adjusted by the adjusting screw 158, so that the cutting operation of the optical fiber 2 is repeated many times. During this time, even if the tension applied to the optical fiber 2 may change, it is possible to always maintain an appropriate tension by adjusting the adjustment screw 158.

  Further, in the present embodiment, the deflection imparting mechanism 24 includes an anvil 34 configured to be able to rotate between two positions around the axis Ax2 extending in the vertical direction. Since it is configured to abut on the optical fiber 2 at two locations by turning around the axis Ax2 and bend it into an S shape, even if the cutting operation of the optical fiber 2 is repeated many times, It is possible to stably impart bending to the optical fiber 2. This makes it easier to stably form the cut surface of the optical fiber 2 at a predetermined inclination angle with respect to the axis perpendicular to the axis.

  At this time, when the anvil 34 rotates to a contact position where the anvil 34 comes into contact with the optical fiber 2 at two locations, the deflection imparting mechanism 24 serves as a positioning member that contacts the anvil 34 and positions it at the contact position. Since the guide pins 36A and 36B are provided, the amount of bending of the optical fiber 2 can be accurately managed.

  Further, in the present embodiment, the interlock mechanism 40 is configured to release the clamping operation by both the clamp units 22A and 22B until the closing operation of the operation lever 14 is completed. 2 can be removed from the apparatus main body 12. As a result, the possibility of inadvertently damaging the optical fiber 2 can be eliminated, and the efficiency of cutting the optical fiber 2 can be increased.

  In the present embodiment, the above series of operations is performed by closing the operation lever 14 that rotates around the axis Ax1 extending in the direction orthogonal to the fiber insertion path at the upper end of the apparatus main body 12. Therefore, the operability when cutting the optical fiber 2 can be improved.

  Further, in the present embodiment, the main body side roller 52 supported by the apparatus main body 12 so as to be positioned near the distal end portion of the optical fiber 2 positioned in the apparatus main body 12 and the operation lever 14 are closed. In this case, a lever side roller 54 is provided which contacts the main body side roller 52 and sandwiches the front end portion of the optical fiber 2 with the main body side roller 52. By rotating the main body side roller 52 and the lever side roller 54 in conjunction with the opening operation of the lever 14, the distal end side cut piece 2Aa of the optical fiber 2 cut by the contact of the blade 20 is discarded. Therefore, the tip-side cut piece 2Aa of the optical fiber 2 can be discarded efficiently.

  In addition, in the present embodiment, since the opening operation of the operation lever 14 is automatically performed by the elastic force of the torsion coil spring 70, the above-described series of operations can be performed only by the operator closing the operation lever 14. Can be performed.

  In the present embodiment, the tip portion of the optical fiber 2 that is positioned on the apparatus main body 12 via the fiber holder 100 by the inner cover 32 is attached to the pair of clamp units 22A and 22B and the deflection applying mechanism 24. In addition, since it is configured to cover the tension applying mechanism 26 and the blade moving mechanism 28, these can be protected from dust and the like, and the operator can be prevented from touching them inadvertently. You can also.

  In the said embodiment, although the bending | flexion provision mechanism 24 becomes a structure which bends the core wire 2A of the optical fiber 2 to S shape by rotation of the anvil 34, the core wire 2A of the optical fiber 2 is formed by methods other than this. It is also possible to employ one configured to bend.

  In addition, the numerical value shown as a specification in the said embodiment is only an example, and of course, you may set these to a different value suitably.

2 Optical fiber 2A Core wire 2Aa Front end side cut piece 2B Coating 10 Optical fiber cutting device 12 Device body 14 Operation lever (moving member)
14a Clamp release pin 18 Clamp drive mechanism 20 Blade 20A Blade body 20A1 Cutting tip 20A1a Point 20A2 Tip support member 20B Body support plate 20Ba Tip face 20Ba1 Recess 20Bb, 30d Small hole 20Bc Notch 22A, 22B Clamp unit 22m Movable block 22m1, 110a, 112a, 116a, 132a, 136a, 142a, 144a, 162a, 182b, 184c, 222a, 236a, 236b Pin 22s Support member 24 Deflection mechanism 26 Tension application mechanism 26 Blade movement mechanism 30 Housing 30a Holder Mounting recess 30b Insertion groove 30c Display window 32 Inner cover 34 Anvil 34A, 34B Anvil 34Aa, 34Ba Clockwise End face 34Aa1, 34Ba1 Protruding part 34C General part 34a, 34b, 110b, 184b, 184d, 184e, 232a, 232b, 238a, 238b Long hole 36A, 36B Guide pin (positioning member)
36Aa, 36Ba Small-diameter portion 38 Disposal box 40 Interlocking mechanism 50 Disposal mechanism 52 Body side roller 54 Lever side roller (moving member side roller)
60 Main shaft 62 First lever 62A Sector gear 62B Bracket 64 Second lever 66 Third lever 68 Cam 70, 114, 134 Torsion coil spring 72 Roller support member 72a, 110c Projection 74 Frame member 80, 214, 254 Reduction gear train 82, 128, 130, 252 and 258 Gear 84 Slider member 86 Link member 92 Cam support plate 94 Upper opening / closing cam 96 Lower opening / closing cam 100 Fiber holder 110 Clamping slider 112 Presser lever 116 Cam stopper 122 Slider member 124, 156, 182 Lever member 126 Cam follower 132 Lower anvil cam 136 Upper anvil cam 138 Center shaft member 140, 166, 192, 234, 242, 244 Fixing pin 142 Tension applying lever 14 b, 182a, 184a, 238c Flange portion 144 Blade moving lever 150, 154, 186, 266 Tension spring 152 Projection member 158 Adjustment screw 160 Clamp position adjustment mechanism 162 Slider 164 Direct acting cam 164a Cam surface inclined portion 164b Cam surface flat portion 170 Changeover switch 184 Lever support plate 188 Blade support block 210 Blade lowering mechanism 212 One-way clutch 216 Worm gear 218 Worm wheel 220 Lead screw 222 Lead nut 232 Horizontal slider 236 Fan-shaped lever 238 Vertical slider 246 Update screw 246a Head 246b Screw part 250 Counter drive Mechanism 256 Shaft 260 Counter 260A Counter gear 260B Gear cover 262 Clutch lever 26 4 Clutch gear 270 Reset pin Ax1, Ax2, Ax3, Ax4, Ax5, Ax6, Ax7, Ax8, Ax9, Ax10, Ax11, Ax12, Ax13 Axis

Claims (8)

In an optical fiber cutting device configured to cut the optical fiber by bringing a blade into contact with the optical fiber in a state where the optical fiber is positioned in the apparatus main body,
A pair of clamping units for clamping the optical fiber on both sides of the cutting position;
A bending mechanism for bending the optical fiber between the clamp units;
A tension applying mechanism for applying tension to the optical fiber between the clamp units;
A blade moving mechanism for moving the blade from the retracted position to the contact position with the optical fiber;
A moving member movably attached to the apparatus body;
The clamping operation by both of the clamp units, the deflection applying operation by the bending applying mechanism, the tension applying operation by the tension applying mechanism, and the blade moving operation by the blade moving mechanism are interlocked with the moving operation of the moving member in a predetermined direction. And an interlocking mechanism that sequentially performs the optical fiber cutting device.   The said interlocking mechanism is comprised so that the clamp operation | movement by both said clamp units may be cancelled | released until the movement operation of the said moving member to the said predetermined direction is completed. Optical fiber cutting device.   The moving member is configured as an operating lever that rotates outside the apparatus main body, and the moving operation in the predetermined direction is performed by rotating the operating lever from the open position to the closed position. The optical fiber cutting device according to claim 1, wherein the optical fiber cutting device is configured. The pair of clamp units are arranged so as to extend substantially parallel to each other in a direction substantially orthogonal to the insertion path of the optical fiber,
Each of the clamp units includes a support member, a fixed block fixed to the support member, and a movable block supported to be relatively movable in a direction substantially orthogonal to the optical fiber insertion path with respect to the support member. Has
The movable block is configured to be movable between a clamp position where the optical fiber is clamped by the movable block and the fixed block, and a clamp release position where the clamp is released. The optical fiber cutting device according to claim 1.   The tension applying mechanism is configured to move a clamp unit positioned on the distal end side of the optical fiber out of the pair of clamp units around an axis extending in a direction substantially orthogonal to the insertion path of the optical fiber at the end of the support member. The optical fiber cutting device according to claim 4, wherein the optical fiber cutting device is configured to apply tension to the optical fiber by being rotated. The deflection imparting mechanism includes an anvil configured to be rotatable between two positions around an axis extending in a direction substantially orthogonal to the optical fiber insertion path,
The anvil is configured to rotate in a predetermined direction around the axis so as to contact the optical fiber at two locations and bend the optical fiber into an S shape. The optical fiber cutting device according to claim 1.   The deflection applying mechanism includes a positioning member that contacts the anvil and positions the anvil at the contact position when the anvil rotates to a contact position that contacts the optical fiber at two locations. The optical fiber cutting device according to claim 6. In the operation of moving the main body side roller supported by the apparatus main body so as to be positioned in the vicinity of the tip end portion of the optical fiber positioned in the apparatus main body, and the moving member in the predetermined direction, A moving member side roller that contacts the main body side roller and sandwiches the tip of the optical fiber with the main body side roller,
The interlocking mechanism rotates at least one of the main body side roller and the moving member side roller in conjunction with a moving operation of the moving member in a direction opposite to the predetermined direction, thereby rotating the blade. The optical fiber cutting device according to any one of claims 1 to 7, wherein the optical fiber cutting device is configured to discard a tip-side cut piece of the optical fiber cut by the contact.

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