Gripper for optical fiber grinding and optical fiber grinding device

Abstract

The invention provides a gripper for optical fiber polishing, which can keep the polishing length of an optical fiber constant and can easily adjust the polishing length, and an optical fiber polishing device to which the gripper can be mounted. The gripper for optical fiber polishing according to the present invention is used for optical fiber polishing. And a holder having a holder body capable of fixing the optical fiber, a movable member capable of moving in the vertical direction with respect to the bottom surface of the holder body, and a position adjustment member capable of adjusting the position of the movable member in the vertical direction.

Description

Technical Field

[0001] The present invention relates to an optical fiber polishing holder for holding an optical fiber when polishing the optical fiber, and an optical fiber polishing device for polishing the optical fiber held in the optical fiber polishing holder. Background Art

[0002] An optical fiber polishing device is known in which an optical fiber polishing holder having an optical fiber mounted thereon is mounted to the optical fiber polishing device, and the optical fiber is polished by rotating a polishing disk of the optical fiber polishing device. In such a device, the extent to which the optical fiber is polished, that is, the polishing length (polishing margin, polishing amount) of the optical fiber is generally adjusted by changing the rotation speed of the polishing disk and the polishing time.

[0003] On the other hand, Patent Document 1 discloses a polishing device in which an optical fiber is mounted on a tubular member arranged at a certain height relative to a polishing disk. In Patent Document 1, the polishing length of the optical fiber is made constant by keeping the height position of the optical fiber constant relative to the polishing disk.

[0004] (Prior art literature)

[0005] (Patent Document)

[0006] (Patent Document 1) Japanese Patent Application Publication No. 2003-19649 Summary of the invention

[0007] Technical issues to be solved

[0008] In the method of adjusting the polishing length of the optical fiber by changing the rotation speed of the polishing disk and the polishing time, the polishing length may vary due to the use state of the polishing film, the installation state of the optical fiber, etc. In addition, in the method described in Patent Document 1, although the polishing length of the optical fiber can be kept constant, it is necessary to change the height of the tubular member in order to change the polishing length, so it is not easy to adjust the polishing length.

[0009] The present invention provides a holder for optical fiber polishing which can keep the polishing length of an optical fiber constant and easily adjust the polishing length, and an optical fiber polishing device capable of installing the holder.

[0010] Solutions to the problem

[0011] The optical fiber polishing clamp of the present invention is used for polishing optical fibers, and comprises a clamp body capable of fixing the optical fiber, a movable part capable of moving in a vertical direction relative to the bottom surface of the clamp body, and a position adjustment part capable of adjusting the position of the movable part in the vertical direction.

[0012] In the optical fiber polishing holder configured as described above, the polishing length of the optical fiber is adjusted by changing the position of the movable member in the vertical direction relative to the bottom surface of the holder body.

[0013] In the above configuration, the movable member may include a protrusion protruding downward from the bottom surface of the clamper body, and the position adjustment member may adjust a protrusion length of the protrusion from the bottom surface of the clamper body.

[0014] In the optical fiber polishing holder configured as described above, the polishing length of the optical fiber is adjusted by changing the protruding length of the protrusion protruding downward from the bottom surface of the holder body to which the optical fiber is fixed.

[0015] In the above configuration, the protrusion may be arranged in a state of penetrating a through hole that penetrates the holder body in the vertical direction.

[0016] In the optical fiber polishing holder configured as described above, the protrusion of the movable member passes through the through hole formed in the holder body and protrudes downward from the bottom surface of the holder body.

[0017] In the above configuration, the position adjustment member may be disposed above the clamper body.

[0018] In the optical fiber polishing holder configured as described above, the position of the movable member is adjusted by operating the position adjusting member above the holder body.

[0019] In the above configuration, the position adjustment member adjusts the position of the movable member in the vertical direction by restricting the upward movement of the movable member to a fixed position.

[0020] In the optical fiber polishing holder configured as described above, the polishing length of the optical fiber is adjusted by restricting the upward movement of the movable member to a fixed position by the position adjusting member.

[0021] In the above configuration, the position adjustment member is disposed above the movable member and adjusts the gap between the position adjustment member and the movable member, thereby restricting the upward movement of the movable member to a fixed position.

[0022] In the optical fiber polishing holder configured as described above, the position adjusting member is disposed above the movable member and adjusts the gap between the position adjusting member and the movable member, thereby limiting the upward movement of the movable member to a fixed position, thereby adjusting the polishing length of the optical fiber.

[0023] In the above structure, more than two protrusions are provided on the movable part, and the more than two protrusions protrude from the bottom surface of the clamp body at more than two positions of the clamp body, and the protruding length of the more than two protrusions from the bottom surface of the clamp body is adjusted in a linkage manner by the position adjustment part.

[0024] In the optical fiber polishing holder constructed as described above, two or more protrusions protrude from the bottom surface of the holder body, thereby adjusting the position of the movable member in the vertical direction at two or more positions. In addition, the protrusion lengths of the two or more protrusions are not adjusted separately but are adjusted in conjunction with the operation of the position adjustment member.

[0025] In the above configuration, an urging mechanism for urging the movable member in a direction toward the clamper body may be disposed between the movable member and the position adjusting member.

[0026] In the optical fiber polishing holder structured as described above, the urging mechanism urges the movable member toward the holder body, thereby preventing the movable member from rapidly moving when the movable member is urged toward the holder body.

[0027] In the above configuration, the position adjustment component may include a micrometer.

[0028] In the optical fiber polishing holder configured as described above, the position of the movable member in the vertical direction can be easily and finely changed by the micrometer head, so that the position of the movable member in the vertical direction can be easily and finely adjusted.

[0029] In the above configuration, the holder body may include a setting mechanism capable of mounting the optical fiber fixing fixture.

[0030] In the optical fiber polishing holder configured as described above, the optical fiber fixing jig is installed by the installation mechanism, so that the optical fiber can be easily installed in the optical fiber polishing holder or removed from the optical fiber polishing holder. In addition, it is not necessary to prepare a polishing holder for each polishing object having different optical fiber types and polishing shapes, but polishing suitable for each polishing specification can be performed by preparing an optical fiber fixing jig for each polishing object and installing it to the installation mechanism of the holder body.

[0031] The present invention may also be configured as an optical fiber polishing device including the optical fiber polishing holder described above.

[0032] Effects of the Invention

[0033] According to the present invention, there are provided an optical fiber polishing holder capable of keeping the polishing length of an optical fiber constant and easily adjusting the polishing length, and an optical fiber polishing device equipped with the holder. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a perspective view of a state in which the optical fiber polishing holder 20 is attached to the optical fiber polishing device 10 .

[0035] Figure 2 This is a plan cross-sectional view of the optical fiber polishing device 10 to which the optical fiber polishing holder 20 is attached, cut along a diagonal direction.

[0036] Figure 3 It is a perspective view of the optical fiber polishing holder 20 .

[0037] Figure 4 It is a top view of the optical fiber polishing holder 20 .

[0038] Figure 5 is along Figure 4 A cross-sectional view of the optical fiber polishing holder 20 cut along the AA line in FIG.

[0039] Figure 6 is along Figure 4 FIG. 2 is a cross-sectional view of the optical fiber polishing holder 20 for cutting along the BB line.

[0040] Figure 7 It is a partial cross-sectional view of the optical fiber polishing device 10 and the optical fiber polishing holder 20 in a state where the movable member 22 is located at the bottom.

[0041] Figure 8 It is a partial cross-sectional view of the optical fiber polishing device 10 and the optical fiber polishing holder 20 in a state where the movable member 22 is located at the upper side.

[0042] Fig. 9 1 is a partial cross-sectional view showing a state in which the optical fiber polishing holder 110 is attached to the optical fiber polishing device 110 .

[0043] Fig.10 It is a partial cross-sectional view showing a state in which the optical fiber polishing holder 220 is attached to the optical fiber polishing device 210.

[0044] (Explanation of Reference Numerals)

[0045] 10...optical fiber polishing device, 11...main body, 12...base member, 13...holding table, 14...clamping rod, 15...movable supporting member, 16...turntable, 17...polishing disc, 20...optical fiber polishing holder, 21...holder body, 22...movable member, 23...micrometer head, 24...first fixing member, 25...second fixing member, 26...protrusion, 27...spring, 30...optical fiber fixing fixture, 40...optical fiber, 110...optical fiber polishing device, 150...extension member, 210...optical fiber polishing device, 220...optical fiber polishing holder, 250...extension member, 251...protrusion. DETAILED DESCRIPTION

[0046] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings shown as an example. Figure 1 It is a perspective view showing a state in which an optical fiber polishing holder 20 (hereinafter referred to as the holder 20 ) is attached to an optical fiber polishing device 10 (hereinafter referred to as the polishing device 10 ). Figure 2 It is a top cross-sectional view of the grinding device 10 with the holder 20 installed cut along the diagonal direction. Figure 1 , Figure 2 Each of the figures shows a state where an optical fiber 40 is mounted to a holder 20 via an optical fiber fixing fixture 30 (hereinafter referred to as fixture 30). In addition, although an example where one optical fiber 40 is mounted to a holder 20 using one fixture 30 is shown for simplicity of description, multiple optical fibers 40 may be mounted to a holder 20 using multiple fixtures 30.

[0047] like Figure 1 As shown, the grinding device 10 includes: a main body 11, which accommodates driving components and the like therein; and a base member 12, which is arranged above the main body 11. The base member 12 is a plate-like member having a predetermined thickness and is formed in a substantially rectangular shape when viewed from above. A holding table 13 for holding the clamp 20 is provided at each of the four corners of the upper part of the base member 12. A clamping rod 14 is provided on each holding table 13. The clamp 20 can be fixed to the grinding device 10 by placing the clamp 20 on the holding table 13 and rotating the clamping rod 14 in the horizontal direction. The position of the base member 12 in the height direction relative to the main body 11 is constant, and the position of the holding table 13 in the height direction relative to the base member 12 is constant. When the clamp 20 is fixed to the grinding device 10, the clamp 20 is fixed at a fixed position in the height direction relative to the base member 12 and the main body 11 (i.e., the mounting surface of the grinding device 10). In addition, since the mechanism for fixing the clamper 20 using the holding table 13 and the clamp rod 14 has an existing structure, a detailed description thereof will be omitted.

[0048] Reference Figure 2The structure of the grinding device 10 is described. A movable support member 15 for supporting a grinding disc 17 and the like is arranged above the base member 12. The movable support member 15 is formed in a plate shape having a predetermined thickness and is roughly circular when viewed from above. In addition, the movable support member 15 has a rod 15A that extends downward through a through hole formed in the base member 12. By causing a driving mechanism (not shown) to act on the rod 15A, the movable support member 15 is configured to be movable in the up and down direction (the height direction of the grinding device 10) relative to the main body 11 and the base member 12. A turntable 16 is placed on the top of the movable support member 15. A grinding disc 17 is placed on the horizontal surface above the turntable 16. The turntable 16 is driven by a motor (not shown) to rotate in the horizontal direction. The motor may include a self-rotating motor that rotates the turntable 16 and a revolving motor that revolves the turntable 16. When the turntable 16 is driven to rotate, the turntable 16 rotates and slides on the top of the movable support member 15. That is, the polishing disc 17 is placed on the turntable 16 which is slidable relative to the movable support member 15. The turntable 16 is rotated in a state where the polishing disc 17 (polishing pad, polishing film, etc.) is placed on the turntable 16, and the optical fiber 40 is polished by the polishing film, etc. In this embodiment, the movable support member 15 and the turntable 16 are equivalent to the members supporting the polishing disc 17. The structure and operation for driving the turntable 16 to rotate can use the existing well-known technology, so the detailed description is omitted.

[0049] As described above, the movable support member 15 is configured to be movable in the height direction relative to the base member 12. As a driving mechanism for moving the movable support member 15 in the height direction, for example, a mechanical mechanism using a cam or a fluid mechanism such as a cylinder can be used, but since the driving mechanism is a known technology, a detailed description is omitted. When the movable support member 15 moves in the height direction, the turntable 16 and the grinding disc 17 move in the height direction in conjunction with (synchronously with) the movable support member 15. Since the position of the optical fiber 40 mounted on the clamp 20 in the height direction is fixed, when the grinding disc 17 moves in the height direction, the relative position of the grinding disc 17 relative to the optical fiber 40 in the height direction changes. That is, the grinding disc 17 approaches the optical fiber 40 or leaves the optical fiber 40. By making the grinding disc 17 approach the optical fiber 40 mounted on the clamp 20, a grinding pressure is applied to the optical fiber 40, thereby grinding the optical fiber 40. By limiting the upward movement of the grinding disc 17 to a fixed position, the relative distance between the optical fiber 40 and the grinding disc 17 can be fixed at a predetermined distance. This makes the polished length of the optical fiber 40 constant. The structure for limiting the upward movement of the polishing disk 17 to a fixed position will be described later.

[0050] Figure 3 is a perspective view of the clamp 20, Figure 4 is a top view of the clamper 20. Figure 5 is along Figure 4 A cross-sectional view of the holder 20 cut along the AA line in FIG. Figure 6 is along Figure 4 sectional view of the holder 20 for optical fiber polishing with BB line cutting in FIG. The holder 20 is a member for holding the optical fiber 40 at a predetermined position relative to the polishing surface of the polishing device 10. The holder 20 includes a holder body 21 capable of fixing the optical fiber 40, a movable member 22 capable of moving in the vertical direction relative to the bottom surface 21A of the holder body 21, a micrometer 23 for limiting the upward movement of the movable member 22 at a fixed position by making the protruding length of the tip end variable, and a first fixing member 24 and a second fixing member 25 for fixing the micrometer 23 at a predetermined height position relative to the holder body 21. In this embodiment, the micrometer 23, the first fixing member 24, and the second fixing member 25 correspond to position adjustment members capable of adjusting the position of the movable member 22 in the vertical direction. In addition, here, adjusting the position of the movable member 22 in the vertical direction includes adjusting the upper limit position in the vertical direction within the movable region of the movable member 22 and limiting the upper limit position in the vertical direction. The upper limit position refers to the highest position within the movable region of the movable member 22 , and is the position farthest from the grinding disc 17 of the grinding device 10 in the vertical direction.

[0051] The clamp body 21 is a component that is placed on the holding table 13 of the polishing device 10 and used in a state where its position is fixed relative to the polishing device 10. The clamp body 21 is formed in a plate shape with a predetermined thickness and is approximately square in a plan view, and a circular hole is formed in the center. A setting hole 21B is formed in the clamp body 21 for mounting the optical fiber fixing jig 30. A fixing pin 21C is fixed to the setting hole 21B, and the jig 30 is mounted to the fixing pin 21C, so that the optical fiber 40 can be mounted on the jig 30. In this embodiment, the setting hole 21B and the fixing pin 21C correspond to a setting mechanism that can mount the jig 30. When the optical fiber 40 is mounted on the jig 30, the end face of the optical fiber 40 protrudes downward from the bottom face 21A of the clamp body 21 by a predetermined length. In this state, the clamp 20 is mounted on the polishing device 10, and the end face of the optical fiber 40 is polished by the polishing device 10. In this embodiment, the optical fiber 40 is not polished while being arranged perpendicularly to the polishing surface, but is obliquely polished while being arranged at a predetermined angle to the perpendicular direction.

[0052] The movable member 22 is a plate-like member having a predetermined thickness and having a long rectangular shape when viewed from above, and is arranged above the clamp body 21 in a state where the length direction faces the diagonal line of the clamp body 21 which is rectangular when viewed from above. The clamp body 21 is a member whose position in the height direction is fixed relative to the grinding device 10, and the movable member 22 is a member configured to be movable in the height direction relative to the clamp body 21 and the grinding device 10. Protrusions 26 extending downward are fixed to the bottom surfaces of both ends of the movable member 22, respectively. The protrusions 26 have a circular cross-sectional shape when viewed from above, and protrude from the bottom surfaces of both ends of the movable member 22 toward the grinding device 10. The movable member 22 connects the two protrusions 26 in a straight line at the shortest distance. When the movable member 22 is arranged in a manner that abuts against the upper surface of the clamp body 21, the protrusions 26 penetrate the through hole 21D that penetrates the clamp body 21 in the vertical direction and protrude downward from the bottom surface 21A of the clamp body 21. The diameter of the protrusion 26 is formed in a manner slightly smaller than the diameter of the through hole 21D, and the protrusion 26 is configured to be able to slide in the through hole 21D in the height direction. The movable member 22 is configured to be able to move in the height direction between the upper surface of the clamp body 21 and the bottom surface of the first fixed member 24. When the movable member 22 moves in the height direction relative to the clamp body 21, the protruding length from the bottom surface 26A of the protrusion 26 to the bottom surface 21A of the clamp body 21 (the protruding length of the bottom surface 26A of the protrusion 26 relative to the bottom surface 21A of the clamp body 21) changes. The outer peripheral portion (the portion close to the outer periphery) of the movable support member 15 of the grinding device 10 is located below the protrusion 26 fixed to the movable member 22, and the protrusion 26 can abut against the movable support member 15. That is, when the movable support member 15 moves upward, the movable support member 15 abuts against the protrusion 26. When the movable supporting member 15 moves further upward from the state of abutting against the protrusion 26 , the movable supporting member 15 can push the protrusion 26 upward.

[0053] The first fixing member 24 is a plate-shaped member formed in a manner that is larger in width than the movable member 22 and shorter in length than the movable member 22. The first fixing member 24 is fixed to four pillars 22A extending upward from the clamp body 21 by bolts or the like. The second fixing member 25 is a plate-shaped member having substantially the same width as the first fixing member 24 and shorter in length than the first fixing member 24. The second fixing member 25 is disposed on the upper surface of the first fixing member 24 and fixed to the first fixing member 24 by bolts or the like. The micrometer 23 is fixed to the second fixing member 25 in a state of being inserted into an insertion hole 25A formed in the center of the second fixing member 25. The tip (lower end) of the micrometer 23 passes through the insertion hole 25A, and also passes through a through hole 24A formed in the center of the first fixing member 24, and protrudes downward from the bottom surface of the first fixing member 24. Since the first fixing member 24, the second fixing member 25 and the main body of the micrometer head 23 (excluding the movable part of the tip end) are fixed relative to the holder body 21, the position of the main body of the micrometer head 23 relative to the holder body 21 in the height direction is fixed.

[0054] The micrometer 23 can finely adjust the downward protruding length of the tip end. By adjusting the protruding length of the tip end of the micrometer 23, the downward protruding length of the tip end of the micrometer 23 from the bottom surface of the first fixed member 24 changes. That is, the distance from the bottom surface of the holder body 21 to the tip end of the micrometer 23 changes. By making the tip end of the micrometer 23 abut against the upper surface of the movable member 22, the micrometer 23 is used as a position adjustment member for adjusting the position of the movable member 22. In this embodiment, the position where the tip end of the micrometer 23 acts on (abuts against) the movable member 22 is near the midpoint of the two protrusions when viewed from above. In addition, since the movable member 22 can move in the height direction between the upper surface of the clamp body 21 and the bottom surface of the first fixed member 24, the protruding length of the bottom surface 21A of the clamp body 21 from the bottom surface 26A of the protrusion 26 here refers to the protruding length when the movable member 22 abuts against the bottom surface of the first fixed member 24, that is, the minimum protruding length of the protruding length of the bottom surface 21A of the clamp body 21 from the bottom surface 26A of the protrusion 26. Therefore, it can be considered that the position adjustment member here is both a member that determines the upper limit position of the movable range of the movable member 22 and a member that determines the minimum protruding length of the bottom surface 21A of the clamp body 21 from the bottom surface 26A of the protrusion 26.

[0055] A spring 27 is arranged as a biasing mechanism between the movable member 22 and the micrometer head 23. The upper end of the spring 27 is inserted into the lower part of the micrometer head 23, and the lower end of the spring 27 abuts against the upper surface of the movable member 22. Accordingly, the spring 27 acts between the upper surface of the movable member 22 and the tip of the micrometer head 23, and biases the movable member 22 downward. That is, the spring 27 biases the movable member 22 in a direction to approach the clamp body 21. Accordingly, when the movable support member 15 moves upward and abuts against the protrusion 26 fixed to the movable member 22, the movable member 22 is prevented from moving upward rapidly.

[0056] Next, the operation when the movable member 22 moves in the height direction will be described. The height direction refers to a vertical direction, that is, a direction perpendicular to the bottom surface 21A of the clamper body 21 . Figure 7 It is a partial cross-sectional view of the polishing device 10 and the clamper 20 in a state where the movable member 22 is located at the bottom. Figure 8 It is a partial cross-sectional view of the polishing device 10 and the clamper 20 in a state where the movable member 22 is located at the upper side. Figure 7 1 is a state before the start of grinding, showing the state before the movable support member 15 of the grinding device 10 moves upward. In this state, the protrusion 26 fixed below the movable member 22 does not abut against the movable support member 15 of the grinding device 10, and the movable member 22 is located at the lowest position in the movable area. At this time, the gap C1 between the upper surface of the movable support member 15 and the bottom surface 26A of the protrusion 26 reaches the maximum in the movable area. In addition, the gap C2 between the upper surface of the movable member 22 and the tip surface of the micrometer head 23 also reaches the maximum in the movable area.

[0057] When the optical fiber 40 is polished, the movable support member 15 is moved from Figure 7 The movable support component 15 moves upward in the state shown. When the movable support component 15 moves upward, the upper surface of the movable support component 15 first abuts against the bottom surface 26A of the protrusion 26. That is, the gap C1 between the upper surface of the movable support component 15 and the bottom surface 26A of the protrusion 26 gradually decreases and the gap C1 disappears (C1=0). When the movable support component 15 moves further upward from this state, the upper surface of the movable support component 15 pushes the bottom surface 26A of the protrusion 26 upward. As a result, the movable component 22 moves upward together with the protrusion 26, so that the gap C2 between the upper surface of the movable component 22 and the tip surface of the micrometer head 23 gradually becomes smaller. As shown in FIG. Figure 8As shown, the movable support member 15 moves upward until the upper surface of the movable member 22 abuts against the tip surface of the micrometer 23. When the upper surface of the movable member 22 abuts against the tip surface of the micrometer 23, the upward movement of the movable support member 15 and the movable member 22 stops. At this time, the gap formed between the upper surface of the movable member 22 and the tip surface of the micrometer 23 disappears (C2=0). The downward protruding length of the tip of the micrometer 23 can be finely adjusted, and by adjusting the protruding length of the tip of the micrometer 23, the upward movement of the movable member 22 can be limited to a predetermined position. In other words, by adjusting the gap C2 between the upper surface of the movable member 22 and the tip surface of the micrometer 23 before the movable member 22 starts to move upward, the upward movement of the movable member 22 can be limited to a desired position. That is, the upward movable range of the movable member 22 can be adjusted.

[0058] After the optical fiber 40 is polished, the movable support member 15 is moved from Figure 8 In the state shown in FIG. 1 , the movable member 22 moves downward together with the movable support member 15, and the contact between the upper surface of the movable member 22 and the tip end surface of the micrometer head 23 is released. When the movable support member 15 moves further downward, at the time point when the movable support member 15 reaches the predetermined position, the contact between the upper surface of the movable support member 15 and the bottom surface 26A of the protrusion 26 is released. When the movable support member 15 further descends, the downward movement of the movable support member 15 is Figure 7 Stop at the position shown.

[0059] As described above, in the present invention, by moving the movable support member 15 of the polishing device 10 up and down, the movable support member 15 is brought into contact with the protrusion 26 fixed to the movable member 22 of the holder 20, so that the movable member 22 is moved up and down. By limiting the upward movement of the movable member 22 at a predetermined position by the micrometer head 23, the movement of the movable support member 15 when moving upward can be stopped at a fixed position. According to this, when polishing the optical fiber 40, the distance in the height direction between the tip of the optical fiber 40 protruding from the bottom surface 21A of the holder body 21 and the polishing disk 17 arranged above the movable support member 15 can be fixed at a fixed position. That is, the relative position of the tip of the optical fiber 40 and the movable member 22 in the vertical direction can be fixed at a fixed position. In addition, by finely changing the protruding length of the tip end surface of the micrometer head 23, the position of the movable member 22 in the vertical direction can be easily adjusted. The optical fiber 40 is mounted on the holder body 21 whose position in the vertical direction is fixed. In contrast, by adopting a structure in which the movable member 22, which can adjust the position in the vertical direction relative to the holder body 21 when the polishing device 10 and the holder 20 are close to each other, abuts against the polishing device 10, the relative distance between the polishing surface of the polishing device 10 and the bottom surface of the holder body 21 can be adjusted. With the above structure, the polishing length of the optical fiber 40 can be fixed to a fixed length, and the polishing length of the optical fiber 40 can be easily changed. Even if the movable member 22 is slightly inclined relative to the polishing surface of the polishing disk 17, the bottom surface 21A of the holder body 21 and the polishing surface of the polishing disk 17 are always kept parallel. Therefore, even when a plurality of optical fibers 40 are mounted on the polishing holder 20, the deviation of the polishing length between the plurality of optical fibers 40 can be prevented. In addition, the following method can be used: the polishing length is set to be short at the beginning of polishing, and the protruding length of the tip of the micrometer head 23 is adjusted during polishing, so as to polish the optical fiber 40 while changing the polishing length in stages.

[0060] The protrusions 26 are provided at both ends of the movable member 22. That is, the protrusions 26 protrude from the bottom surface 21A of the clamp body 21 at two locations. In addition, the micrometer head 23 abuts against the movable member 22 at the middle portion of the two protrusions 26. By making the micrometer head 23 abut against the movable member 22 at the middle portion of the two protrusions 26, the protrusion lengths of the two protrusions 26 protruding from the bottom surface 21A of the clamp body 21 are adjusted to the same length in a linked manner. Since the movable member 22 and the movable support member 15 abut at two points, the movable member 22 and the movable support member 15 can be held in parallel.

[0061] Since the protrusion 26 protrudes downward while passing through the through hole 21D that passes through the holder body 21 in the vertical direction, it is not necessary to form a protrusion on the outside of the holder body 21, and the protrusion 26 can be made to protrude toward the grinding device 10 with a simple structure. Although the protrusion 26 protrudes downward from the holder body 21, since the position adjustment components such as the micrometer head 23 are arranged above the holder body 21, the position in the height direction can be adjusted above the holder body 21, so the operability is also good. Since the protrusion 26 is formed at two positions and the protrusion 26 abuts against the movable support component 15 at two positions, the distance between the bottom surface 21A of the holder body 21 and the grinding surface of the grinding disk 17 can be adjusted more accurately. By using the spring 27 to apply force to the movable component 22 in the direction close to the holder body 21, when the movable support component 15 pushes the movable component 22 upward, the movable component 22 can be prevented from moving rapidly. This prevents the movable member 22 from violently colliding with the tip of the micrometer head 23. By using the micrometer head 23 as the position adjustment member, the position of the movable member 22 in the vertical direction can be adjusted simply and finely.

[0062] In the above-mentioned embodiment, an example of directly mounting the optical fiber in the clamp is described, but the present invention is not limited to this. For example, the present invention can also be applied to a structure for polishing an optical fiber mounted on a collar or an array, or a structure for mounting the optical fiber on a clamp via a connector or the like. In addition, in the above-mentioned embodiment, an example of oblique polishing in which the optical fiber is polished in a state tilted at a predetermined angle from a direction perpendicular to the polishing surface is described, but the present invention is not limited to this. The present invention can also be applied to a structure for polishing the optical fiber in a perpendicular configuration relative to the polishing surface. By changing the structure of the clamp for fixing the optical fiber, various types of optical fibers can be mounted in the clamp for polishing.

[0063] In the above-mentioned embodiment, a structure in which the relative distance between the grinding disc and the optical fiber in the height direction is changed by moving the movable support member supporting the grinding disc of the grinding device, but the grinding device to which the present invention can be applied is not limited thereto. For example, the present invention can also be applied to a structure in which the relative distance between the grinding disc and the optical fiber in the height direction is changed by fixing the position of the grinding disc and moving the clamp in the height direction. In this case, the downward movement of the clamp is limited to a fixed position by the position adjustment member. As long as the clamp and the grinding device have a structure in which the relative distance between the grinding disc and the clamp in the height direction can be changed, the present invention can be applied.

[0064] In the above embodiment, an example is described in which the movable supporting part of the grinding device abuts against the movable part of the clamp to push the movable part upward, but the part that the movable part of the clamp abuts is not limited to the movable supporting part of the grinding device. As long as it is a part that moves in the height direction, a structure in which the movable part of the clamp abuts against any part of the grinding device can also be adopted. In addition, in the case of a structure in which the clamp moves in the height direction and the grinding device does not move in the height direction, the movable part of the clamp can abut against any part of the grinding device.

[0065] In the above-mentioned embodiment, an example of disposing a long strip of movable parts on the top of the clamp body is described, but the shape of the movable parts is not particularly limited. As long as it is a part that can move in the height direction relative to the clamp body, the shape of the movable part is limited. In addition, the direction in which the movable part is arranged is not limited to the diagonal direction of the clamp body. It is also possible to use a movable part that is rectangular or circular when viewed from above, and it is also possible to arrange the movable part in a manner parallel to the line forming the outer shape of the clamp body. It is also possible to form the movable part in an arc shape when viewed from above, so that the position adjustment component acts on the central part.

[0066] In the above-mentioned embodiment, the structure in which two protrusions protruding downward are set at the two ends of the movable part is described as an example, but the present invention is not limited to this. For example, one or more than three protrusions can be set. However, by setting more than two protrusions, the movable part of the clamp and the movable supporting part of the grinding device can be kept more parallel. By setting two protrusions and making the position adjustment component act on the middle part of the two protrusions, the positions of the two protrusions can be adjusted by one position adjustment component. In addition, by making the position adjustment component act on the middle part, the parallelism between the movable part of the clamp and the movable supporting part of the grinding device can be further improved. In addition, the middle part refers to the position near the middle of the two protrusions, and the middle part does not mean that the distance between the position and the two protrusions is exactly the same.

[0067] In the above-mentioned embodiment, an example of using a micrometer as a position adjustment component is described, but the position adjustment component of the present invention is not limited to this. For example, a structure in which the height position of the movable component is adjusted by changing the number of sheets of the sandwiched gaskets (spacers) or the thickness of the gaskets may be adopted. In addition, a structure in which the upper limit of the position of the movable component in the height direction is limited by the micrometer is described, but the present invention is not necessarily limited to this structure. In addition, although a first fixing component and a second fixing component are used to fix the micrometer, it is not necessary to use two fixing components. As long as the structure can fix the micrometer to the clamp body, it is not necessary to use a fixing component. For example, the following structure can be considered: the tip of the micrometer protrudes downward directly from the bottom of the clamp, so that the micrometer functions as a movable component and a position adjustment component.

[0068] In the above-mentioned embodiment, an example of configuring a spring as a force-applying mechanism between the movable part and the micrometer head is described, but the position of configuring the force-applying mechanism is not limited to this. There is no limitation on the position of configuring the force-applying mechanism, as long as the force-applying mechanism applies force to the movable part in the direction close to the clamp body. For example, the force-applying mechanism can be configured between the bottom surface of the second fixed part and the movable part without inserting the force-applying mechanism into the tip of the micrometer head. In addition, an example of using a spring as a force-applying mechanism is described, but the force-applying mechanism is not limited to a spring. For example, elastic components such as polyurethane, hydraulic dampers, etc. can also be used as force-applying mechanisms.

[0069] As another embodiment of the polishing device, an optical fiber polishing device 110 (hereinafter referred to as the polishing device 110 ) will be described. Fig. 9 1 is a partial cross-sectional view of a state where the holder 20 is installed in the grinding device 110. The holder 20 is the same as the holder used in the above-mentioned embodiment. The structure of the grinding device 110 is basically the same as that of the grinding device 10, except that the extension member 150 is fixed to the movable support member 115. The extension member 150 is a plate-shaped member fixed to the movable support member 115 supporting the turntable 116 and the grinding disk 117 and extending to the radial outer side of the grinding disk 117. When the movable support member 115 moves upward, the extension member 150 abuts against the protrusion 26 of the movable member 22 and pushes the movable member 22 upward. Accordingly, even if the position of the protrusion 26 of the movable member 22 is located closer to the outside than the movable support member 115, the extension member 150 abuts against the protrusion 26, so that the movable member 22 can be pushed upward in the height direction relative to the holder body 21. In addition, the member to which the extension member 150 is fixed is not limited to the movable support member 115. The extension member 150 may be fixed to any member as long as it is a member that supports the grinding disc 117. For example, the extension member 150 may be fixed to the turntable 116.

[0070] As another embodiment of the polishing device and the holder, an optical fiber polishing device 210 (hereinafter referred to as the polishing device 210 ) and an optical fiber polishing holder 220 (hereinafter referred to as the holder 220 ) will be described. Fig.101 is a partial cross-sectional view of a state where the optical fiber polishing holder 220 is installed in the polishing device 210. The structure of the polishing device 210 is basically the same as that of the polishing device 10, except that the extension member 250 is fixed to the movable support member 215. The extension member 250 is a plate-like member fixed to the movable support member 215 supporting the turntable 216 and the polishing disk 217 and extending radially outward from the polishing disk 217. In addition, in the extension member 250, a circular protrusion 251 protrudes upward in the height direction when viewed from above. That is, the extension member 250 and the protrusion 251 form an L-shaped cross-sectional shape extending radially outward and protruding upward when viewed from the side. The structure of the holder 220 is basically the same as that of the holder 20, except that no protrusion is formed on the bottom surface of the movable member 222. That is, in this embodiment, instead of forming a protrusion on the bottom surface of the movable part 222, a protrusion 251 protruding upward is formed on the extension part 250 fixed to the movable support part 215. When the movable support part 215 moves upward, the protrusion 251 of the extension part 250 penetrates the through hole 221D of the clamp body 221 and protrudes above the clamp body 221. Then, the protrusion 251 abuts against the bottom surface of the movable part 222, thereby pushing the movable part 222 upward relative to the clamp body 221. According to this, the movable part 222 can be pushed upward in the height direction in a state where the bottom surface of the movable part 222 is formed flat without providing the protrusion. In addition, the component to which the extension part 250 is fixed is not limited to the movable support part 215. The extension part 250 can be fixed to any component as long as it is a component that supports the grinding disk 217. Alternatively, a protrusion may be provided on the movable member 222 and a protrusion may also be provided on the extension member 250 , and a structure in which the protrusions abut against each other may be adopted.

[0071] In addition, it is self-evident that the present invention is not limited to the above-mentioned embodiments. For those skilled in the art, it is natural to think that the following items are disclosed as an embodiment of the present invention:

[0072] The interchangeable components and structures disclosed in the above embodiments may be appropriately combined and changed for application;

[0073] Parts and structures that are not disclosed in the above embodiments but are well-known technologies and can be replaced with the parts and structures disclosed in the above embodiments are appropriately replaced, and combined and changed for application;

[0074] Although not disclosed in the above embodiments, components and structures that can be conceived by those skilled in the art based on the known technology as replacements for the components and structures disclosed in the above embodiments may be appropriately replaced and combined and changed for application.

Claims

1. A holder for polishing optical fiber, used for polishing optical fiber, characterized in that: have: a holder body capable of fixing the optical fiber, a movable member capable of moving in a vertical direction relative to the bottom surface of the clamp body, and a position adjusting member capable of adjusting the position of the movable member in the vertical direction, The position adjustment component is arranged above the movable component and the clamp body to which it belongs. At least a portion of the movable member is disposed between the clamp body and the position adjustment member. The position of the movable member in the vertical direction is adjusted by adjusting a gap between the position adjustment member and the movable member so that the position adjustment member restricts upward movement of the movable member to a fixed position.

2. The optical fiber polishing holder according to claim 1, characterized in that: The movable member has a protrusion protruding downward from the bottom surface of the clamp body, The position adjustment member adjusts a protrusion length of the protrusion from a bottom surface of the holder body.

3. The optical fiber polishing holder according to claim 2, characterized in that: The protrusion is arranged in a state of penetrating a through hole that penetrates the clamper body in the vertical direction.

4. The optical fiber polishing holder according to claim 2, characterized in that: The movable member is provided with two or more protrusions. Two or more of the protrusions protrude from the bottom surface of the clamp body at two or more locations of the clamp body, The position adjusting member cooperatively adjusts the protrusion lengths of the two or more protrusions from the bottom surface of the clamper body.

5. The optical fiber polishing holder according to claim 1, characterized in that: The urging mechanism for urging the movable member in a direction toward the clamper body is arranged between the movable member and the position adjusting member.

6. The optical fiber polishing holder according to claim 1, characterized in that: The position adjustment component includes a micrometer.

7. The optical fiber polishing holder according to any one of claims 1 to 6, characterized in that: The clamp body has a setting mechanism capable of installing a clamp for fixing an optical fiber.

8. An optical fiber polishing device comprising the optical fiber polishing holder according to any one of claims 1 to 6.

9. The optical fiber polishing device according to claim 8, characterized in that: The part supporting the grinding disc has a protrusion protruding upward. The protrusion is capable of abutting against the movable member.

10. The optical fiber polishing device according to claim 8, characterized in that: The component supporting the grinding disk has an extension component extending radially outward of the grinding disk. The movable member is capable of abutting against the extending member.

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