JP5117437B2 - Fiber optic cutting machine - Google Patents

Description

  The present invention relates to an optical fiber cutting machine.

  Conventionally, the following is known as an optical fiber cutting machine (for example, refer to patent documents 1). That is, in the optical fiber cutting machine described in Patent Document 1, after the optical fiber is fixed by the first holding means and the second holding means in a state where a twisting force is applied to the optical fiber, Tension is applied between the second holding means, and in this state, the cleaving tool is brought into contact between the first holding means and the second holding means in the optical fiber, so that the optical fiber is oriented in a direction perpendicular to the optical axis. It is set as the structure cut | disconnected along the direction which inclines.

Japanese Patent No. 2948334 (FIG. 3)

  However, in the above-described optical fiber cutting machine, the first holding means or the second holding means is made of metal, and the contact surface with the optical fiber in the first holding means or the second holding means is a cutting surface. In this case, if the fixing force (clamping force) of the first holding means or the second holding means with respect to the optical fiber is strong, a flaw is formed on the surface portion of the optical fiber by the cutting surface. Further, in the state where the surface portion of the optical fiber is scratched as described above, when the tension is applied to the optical fiber, the optical fiber is broken from the scratch, and the intended tension and twisting force are applied to the optical fiber. There is a problem that it cannot be made to work.

  In order to solve this problem, it is conceivable to reduce the surface roughness of the contact surface with the optical fiber in the first holding means or the second holding means. However, since the friction between the optical fiber and the contact surface is reduced in this way, when the tension or twisting force is applied to the optical fiber, the optical fiber slips and the initial tension or twist applied to the optical fiber. There is a problem that power cannot be maintained.

  This invention is made | formed in view of the said subject, Comprising: It is providing the optical fiber cutting machine which can eliminate the said problem and can cut | disconnect an optical fiber by a desired angle.

In order to solve the above-described problem, an optical fiber cutting machine according to claim 1 is provided with one fixing portion that fixes a bare fiber in the optical fiber in a state where tension and torsional force are applied to the optical fiber, and in the fixed portion spaced locations along the optical axis of the optical fiber, the other fixing portion for fixing through the covering portion of the optical fiber, and the optical axis of the form a wound bare fiber to said bare fiber A blade that cuts along a direction that is inclined with respect to a vertical direction, and the one fixing portion includes a pair of holding portions that hold and fix the bare fiber . at least one is made of metal, the contact surface with the bare fibers in the metal and has been the clamping portion, the surface portion of the bare fiber when the pair of holding portions has sandwiching the bare fiber The wound is shaped Surface treatment for suppressing be is applied is, by the surface treatment, the surface roughness of the contact surface is less 6.3μm in JIS10-point average roughness Rz, the pair of holding portions, the bare It has a configuration for clamping in holding force than 6N fiber.

  In this optical fiber cutting machine, two positions spaced apart in the optical axis direction in the optical fiber in a state where tension and twisting force are applied to the optical fiber are fixed by the pair of fixing portions, and the pair of fixings in the optical fiber Scratches are formed by the blade on the surface portion between the portions. And thereby, an optical fiber is cut | disconnected along the direction which inclines with respect to the direction perpendicular | vertical to an optical axis.

  Here, in this optical fiber cutting machine, at least one of the pair of fixing parts has a pair of holding parts for holding the optical fiber, and at least one of the pair of holding parts is made of metal. In addition, a surface treatment for preventing the surface of the optical fiber from being damaged when the pair of sandwiching portions sandwich the optical fiber on the contact surface with the optical fiber in the sandwiching portion made of metal. Is given.

  Therefore, even when the pair of sandwiching portions sandwich the optical fiber, it is possible to prevent the surface portion of the optical fiber from being damaged. Thereby, it is possible to prevent the optical fiber from being broken.

  Further, the pair of sandwiching portions is configured to be able to sandwich the optical fiber while suppressing slippage with respect to the optical fiber in a state where tension and twisting force are applied to the optical fiber.

  Therefore, even if tension and torsional force are applied to the optical fiber, slippage between the pair of sandwiching portions and the optical fiber can be suppressed.

  As described above, according to this optical fiber cutting machine, when the optical fiber is cut, it is possible to prevent the optical fiber from being broken due to a scratch on the surface portion of the optical fiber, and to hold the pair of clamps. Slip between the portion and the optical fiber can be suppressed. Therefore, the optical fiber can be cut at a desired angle (a state where the cut end surface of the optical fiber is inclined at a desired angle with respect to the direction perpendicular to the optical axis can be obtained).

  According to this optical fiber cutting machine, since the surface roughness of the contact surface can be reduced, the formation of scratches on the surface portion of the optical fiber can be suppressed.

  Here, in this optical fiber cutting machine, if the surface roughness of the contact surface is larger than 6.3 μm in terms of JIS 10 point average roughness Rz, scratches are formed on the surface portion of the optical fiber.

  However, according to this optical fiber cutting machine, since the surface roughness of the contact surface is 6.3 μm or less in terms of JIS 10-point average roughness Rz, the formation of scratches on the surface portion of the optical fiber is suppressed. be able to.

Optical fiber cutting machine according to claim 2, in the optical fiber cutting machine according to claim 1, wherein the pair of holding portions are sandwiched by clamping force of more than 1.2N per 1mm of an optical axis of the bare fiber It is the composition.

  Here, in this optical fiber cutting machine, when the pair of sandwiching portions are configured to be able to sandwich the optical fiber with a sandwiching force of less than 1.2 N per 1 mm in the optical axis direction, the pair of sandwiching portions and the optical fiber Slipping occurs.

  However, according to this optical fiber cutting machine, since the pair of sandwiching portions can sandwich the optical fiber with a sandwiching force of 1.2 N or more per 1 mm in the optical axis direction, the pair of sandwiching portions and the optical fiber And slippage can be suppressed.

  As described above in detail, according to the present invention, when the optical fiber is cut, it is possible to prevent the optical fiber from being broken due to a scratch on the surface portion of the optical fiber, and to hold the pair of clamps. Slip between the portion and the optical fiber can be suppressed. Therefore, the optical fiber can be cut at a desired angle (a state where the cut end surface of the optical fiber is inclined at a desired angle with respect to the direction perpendicular to the optical axis can be obtained).

It is a top view of the optical fiber cutting machine concerning a first embodiment of the present invention. It is a side view including a partial section of the optical fiber cutting machine concerning a first embodiment of the present invention. FIG. 1B is a perspective view of the fixing portion shown in FIG. 1A, showing a state where a pair of clamping portions is opened. It is a figure which shows the state which closed the pair of clamping part shown by FIG. 2A. It is a figure explaining operation | movement in the optical fiber cutting machine which concerns on 1st embodiment of this invention. It is a principal part expanded side view of the optical fiber cut | disconnected by the optical fiber cutting machine which concerns on 1st embodiment of this invention. It is a figure which shows the test result performed about the optical fiber cutting machine which concerns on 1st embodiment of this invention. It is a figure which shows the test result performed about the optical fiber cutting machine which concerns on 1st embodiment of this invention. It is a principal part expanded sectional view which shows the 1st modification of the fixing | fixed part shown by FIG. 2A. It is a principal part expanded sectional view which shows the 2nd modification of the fixing | fixed part shown by FIG. 2A. It is a top view of the optical fiber cutting machine concerning a second embodiment of the present invention. It is a figure explaining operation | movement in the optical fiber cutting machine which concerns on 2nd embodiment of this invention.

[First embodiment]
First, a first embodiment of the present invention will be described.

  The optical fiber cutting machine 10 according to the first embodiment of the present invention shown in FIGS. 1A and 1B is for cutting the optical fiber 12 along a direction inclined with respect to a direction perpendicular to the optical axis. A pair of fixing portions 14 and 16, a tension portion 18, a twist portion 20, and a blade 22 are provided as main components.

  The pair of fixing portions 14 and 16 are arranged apart from each other so that two positions of the optical fiber 12 which are separated in the optical axis direction can be fixed. One fixing portion 14 is provided integrally with a rotating member 32 described later, and the other fixing portion 16 is provided integrally with the support member 24.

  The tension portion 18 includes a support member 26, a slide member 28, and a tensile force imparting member 30. The support member 26 is immovable with respect to the support member 24 described above, and the slide member 28 is slidable in the optical axis direction of the optical fiber 12 with respect to the support member 26.

  The tensile force applying member 30 is configured by a compression spring provided between the support member 26 and the slide member 28, and biases the slide member 28 in the separating direction with respect to the support member 26.

  The torsion part 20 includes a rotating member 32 and a torsional force applying member 34. The rotating member 32 is supported by the slide member 28 so as to be rotatable around the optical axis of the optical fiber 12, and the torsional force applying member 34 is configured to rotate the rotating member 32 around the optical axis of the optical fiber 12. Yes.

  The blade 22 is slidable in a direction perpendicular to the optical axis of the optical fiber 12, and is configured to form a scratch on the surface portion between the pair of fixing portions 14 and 16 in the optical fiber 12.

  In addition, since the optical fiber 12 cannot be cut | disconnected if the tension | tensile_strength which acts on the optical fiber 12 is less than 200g, here, the tension | tensile_strength provision member is set so that the tension | tensile_strength which acts on the optical fiber 12 may be 200g or more. 30 elastic modulus, compression stroke, etc. are set.

  In addition, in order to reduce the reflection of the cut end face of the optical fiber 12 to −60 dB or less, the angle θ of the cut end face needs to be 8 ° or more (FIG. 4). Therefore, the rotation angle of the rotating member 32 is set so that the optical fiber 12 is twisted by 6.8 ° or more per cm.

  In addition, one of the above-described pair of fixing portions 14 and 16 is more specifically configured as follows.

  That is, as shown in FIGS. 2A and 2B, one fixing portion 14 includes a pair of holding portions 38 and 40 (a lid and a base) that hold and fix the optical fiber 12 (bare fiber). The pair of sandwiching portions 38 and 40 are made of metal such as stainless steel and are formed by cutting.

  The contact surfaces 38A and 40A with the optical fiber 12 in each clamping part 38 and 40 are formed in a flat shape, and scratches are formed on the surface part of the optical fiber 12 in each of the contact surfaces 38A and 40A. A polishing treatment is applied as a surface treatment for suppression.

  This polishing process is, for example, performed manually, and is roughly processed (processing using a cutting oil) using grindstones # 600, # 800, and # 1000 in order, and then a solid oil-based abrasive (lap powder # 2000) and a cutting oil.

  Each contact surface 38A, 40A has a surface roughness of 6.3 μm or less in terms of JIS 10-point average roughness Rz by this polishing treatment.

  Further, the pair of sandwiching portions 38 and 40 are integrally provided with a spring or the like (not shown), and the sandwiching force with respect to the optical fiber 12 is optimized by appropriately setting the elastic force of the spring or the like. .

  In other words, the pair of sandwiching portions 38 and 40 is configured to be able to sandwich the optical fiber 12 while suppressing slippage with respect to the optical fiber 12 in a state where tension and torsional force are applied to the optical fiber 12. Specifically, the optical fiber 12 can be clamped with a clamping force of 1.2 N or more per 1 mm in the optical axis direction. The pair of sandwiching portions 38 and 40 has a width of, for example, 5 mm, and the pair of sandwiching portions 38 and 40 can sandwich the optical fiber 12 with a sandwiching force of 6.0 N or more. Yes.

  The other fixing portion 16 shown in FIGS. 1A and 1B is configured to sandwich the optical fiber 12 via the covering portion 42, and is made of, for example, resin or rubber. The optical fiber 12 is made of glass and has a diameter of 125 μm.

  Next, the operation and effect of the first embodiment of the present invention will be described.

  In this optical fiber cutting machine 10, first, as shown in the upper diagram of FIG. 3, two positions spaced apart in the optical axis direction in the optical fiber 12 are fixed by a pair of fixing portions 14 and 16. Then, as shown in the upper middle diagram of FIG. 3, the tensile force is applied to the optical fiber 12 by the slide member 28 being separated from the support member 26 by the tensile force applying member 30. When the rotating member 32 is rotated around the optical axis of the optical fiber 12 by the applying member 34, a twisting force is applied to the optical fiber 12.

  Then, with the tension and torsional force acting on the optical fiber 12 as described above, the blade 22 is slid as shown in the middle and lower views of FIG. 3, and the pair of fixing portions 14 in the optical fiber 12 is supported by the blade 22. , 16 are formed on the surface portion. As a result, the optical fiber 12 is cut along a direction inclined with respect to a direction perpendicular to the optical axis, as shown in the lower diagram of FIG.

  Here, in the optical fiber cutting machine 10, one fixing part 14 includes a pair of metal holding parts 38 and 40 that hold the optical fiber 12. The contact surfaces 38A, 40A of the sandwiching portions 38, 40 with the optical fiber 12 are subjected to a polishing treatment as a surface treatment for suppressing the formation of scratches on the surface portion of the optical fiber 12. Yes.

  Therefore, since the surface roughness of each contact surface 38A, 40A can be reduced, even when the pair of holding portions 38, 40 hold the optical fiber 12, scratches are formed on the surface portion of the optical fiber 12. Can be suppressed. Thereby, it is possible to prevent the optical fiber 12 from being broken.

  In addition, the pair of sandwiching portions 38 and 40 have a proper sandwiching force with respect to the optical fiber 12, and suppress the slip with respect to the optical fiber 12 in a state where a tension and a twisting force are applied to the optical fiber 12. The fiber 12 can be sandwiched.

  Therefore, even if tension and torsional force are applied to the optical fiber 12, slippage between the pair of sandwiching portions 38 and 40 and the optical fiber 12 can be suppressed.

  As described above, according to the optical fiber cutting machine 10, when the optical fiber 12 is cut, it is possible to prevent the optical fiber 12 from being broken due to scratches formed on the surface portion of the optical fiber 12. The slip between the pair of sandwiching portions 38 and 40 and the optical fiber 12 can be suppressed. Therefore, the optical fiber 12 can be cut at a desired angle (a state where the cut end surface of the optical fiber 12 is inclined at a desired angle with respect to the direction perpendicular to the optical axis can be obtained).

  Next, the basis of each setting numerical value described above will be described.

  FIG. 5 shows the test results when the clamping force of the pair of clamping portions 38 and 40 with respect to the optical fiber 12 is 6.0 N, and the contact surfaces 38A and 40A are a cutting surface and a polishing surface. .

  In this test, the surface roughness of the cut surface is greater than 6.3 μm in terms of JIS 10-point average roughness Rz, and the surface roughness of the polished surface is 6.3 μm or less in terms of JIS 10-point average roughness Rz. The number of tests was N = 10.

  As shown in this figure, in the case of a cut surface, that is, when the surface roughness of the contact surfaces 38A and 40A is larger than 6.3 μm in terms of JIS 10 point average roughness Rz, scratches are formed on the surface portion of the optical fiber 12. The optical fiber 12 was broken.

  On the other hand, in the case of the polished surface, that is, when the surface roughness of the contact surfaces 38A and 40A is 6.3 μm or less in terms of JIS 10-point average roughness Rz, scratches are not formed on the surface portion of the optical fiber 12. The optical fiber 12 did not break. In addition, slipping between the pair of sandwiching portions 38 and 40 and the optical fiber 12 did not occur.

  Further, FIG. 6 shows the result of the test when the contact surfaces 38A and 40A are the above-described polished surfaces, and the clamping force of the pair of clamping portions 38 and 40 with respect to the optical fiber 12 is 1.0N to 10.0N. It has been

  As shown in this figure, when the clamping force is less than 6.0 N (the clamping force per 1 mm in the optical axis direction with respect to the optical fiber 12 is less than 1.2 N), the pair of clamping parts 38 and 40 and the optical fiber 12 and slip occurred.

  On the other hand, when the clamping force is 6.0 N or more (the clamping force per 1 mm in the optical axis direction with respect to the optical fiber 12 is 1.2 N or more), the slip between the pair of clamping parts 38 and 40 and the optical fiber 12 Did not occur. Further, no scratch was formed on the surface portion of the optical fiber 12, and the optical fiber 12 was not broken.

  Therefore, according to the optical fiber cutting machine 10 according to the first embodiment of the present invention, the surface roughness of the contact surfaces 38A, 40A is 6.3 μm or less in terms of the JIS 10 point average roughness Rz. It is possible to suppress the formation of scratches on the surface portion of the film. Further, since the clamping force of the pair of clamping parts 38 and 40 is 6.0 N or more (the clamping force per 1 mm in the optical axis direction with respect to the optical fiber 12 is 1.2 N or more), the pair of clamping parts 38 and 40 Slip with the optical fiber 12 can be suppressed.

  Next, a modification of the first embodiment of the present invention will be described.

  In the above embodiment, the other fixing portion 16 is arranged and configured to hold the optical fiber 12 via the covering portion 42, but is similar to the pair of holding portions 38 and 40 in the one fixing portion 14 described above. It may be arranged and constituted so that the covering portion 42 may be directly sandwiched.

  Further, in the above embodiment, the contact surfaces 38A, 40A of the sandwiching portions 38, 40 are formed in a flat shape, but for example, the contact surface 40A of the other sandwiching portion 40 (base) is shown in FIG. As shown, a holding groove 44 having a V-shaped cross section for holding the optical fiber 12 may be formed. Further, the holding groove 44 may be formed in a U shape as shown in FIG.

  Further, as described above, for example, when the holding groove 44 is formed on the contact surface 40A of the other sandwiching portion 40, only the contact surface 38A of the one sandwiching portion 38 (lid) is polished. Also good.

  In the above-described embodiment, only one of the pair of sandwiching portions 38 and 40 may be made of metal, and only the contact surface of the sandwiching portion made of metal may be polished.

  Moreover, in the said embodiment, as long as the surface roughness equivalent to a grinding | polishing process can be ensured on each contact surface 38A, 40A, the other surface treatment may be given.

  In the above embodiment, the optical fiber cutting machine 10 is configured to apply a twisting force after applying a tension to the optical fiber 12. However, the optical fiber cutting machine 10 applies a tension after applying the twisting force to the optical fiber 12. The optical fiber 12 may be configured to simultaneously apply tension and torsional force.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.

  The optical fiber cutting machine 50 according to the second embodiment of the present invention shown in FIG. 9 is different from the optical fiber cutting machine 10 according to the first embodiment of the present invention described above in place of the tension portion 18 and the twist portion 20. , A tension portion 58 and a twist portion 60 are provided. In addition, the same code | symbol is demonstrated about the structure same as 1st embodiment of the above-mentioned this invention.

  The tension portion 58 includes a support member 62, a slide member 64, and a tensile force applying member (not shown). The support member 62 is immovable with respect to the support member 24, and the slide member 64 is slidable in the optical axis direction of the optical fiber 12 with respect to the support member 62. One fixed portion 14 is integrally provided on the slide member 64.

  Further, the above-described tensile force applying member (not shown) is constituted by, for example, a compression spring provided between the support member 62 and the slide member 64, and the slide member 64 is attached to the support member 62 in the separation direction. It is fast.

  The twisted portion 60 is disposed on the opposite side of the other fixed portion 16 with respect to the one fixed portion 14, and includes a support member 68, a rotating member 70, and a torsional force applying member (not shown). The support member 68 is immovable relative to the support members 24 and 62, and the rotation member 70 is supported by the support member 68 so as to be rotatable around the optical axis of the optical fiber 12.

  Further, the above-described torsional force applying member (not shown) is configured to apply a rotational force around the optical axis of the optical fiber 12 to the rotating member 32.

  Next, the operation and effect of the second embodiment of the present invention will be described.

  In the optical fiber cutting machine 50, first, as shown in the upper diagram of FIG. 9, one end of the optical fiber 12 is fixed by the rotating member 70, and the other end of the optical fiber 12 is fixed by the other fixing portion 16. Is done. 9, the torsional force is applied to the optical fiber 12 by rotating the rotating member 70 around the optical axis of the optical fiber 12 by a torsional force applying member (not shown).

  Subsequently, after the optical fiber 12 is fixed by the one fixing portion 14, the fixing of the optical fiber 12 by the rotating member 70 is released. Then, when the slide member 64 is separated from the support member 62 by a tensile force applying member (not shown), tension is applied to the optical fiber 12.

  Then, with the tension and torsional force acting on the optical fiber 12 as described above, the blade 22 is slid as shown in the middle and lower views of FIG. 9, and the pair of fixing portions 14 in the optical fiber 12 is supported by the blade 22. , 16 are formed on the surface portion. Then, as shown in the lower diagram of FIG. 9, the optical fiber 12 is cut along a direction inclined with respect to a direction perpendicular to the optical axis.

  Here, also in this optical fiber cutting machine 50, scratches are formed on the surface portion of the optical fiber 12 on the contact surfaces 38A, 40A (see FIG. 2) of the holding portions 38, 40 of the one fixing portion 14. As a surface treatment for suppressing this, a polishing treatment is performed.

  Therefore, since the surface roughness of each contact surface 38A, 40A can be reduced, even when the pair of holding portions 38, 40 hold the optical fiber 12, scratches are formed on the surface portion of the optical fiber 12. Can be suppressed. Thereby, it is possible to prevent the optical fiber 12 from being broken.

  In addition, the pair of sandwiching portions 38 and 40 have a proper sandwiching force with respect to the optical fiber 12, and suppress the slip with respect to the optical fiber 12 in a state where a tension and a twisting force are applied to the optical fiber 12. The fiber 12 can be sandwiched.

  Therefore, even if tension and torsional force are applied to the optical fiber 12, slippage between the pair of sandwiching portions 38 and 40 and the optical fiber 12 can be suppressed.

  As described above, the optical fiber cutting machine 50 can prevent the optical fiber 12 from being broken due to a scratch formed on the surface portion of the optical fiber 12 when the optical fiber 12 is cut. Slip between the pair of sandwiching portions 38 and 40 and the optical fiber 12 can be suppressed. Therefore, the optical fiber 12 can be cut at a desired angle (a state where the cut end surface of the optical fiber 12 is inclined at a desired angle with respect to the direction perpendicular to the optical axis can be obtained).

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited above, Of course, it can change and implement variously within the range which does not deviate from the main point. .

  Further, in each of the optical fiber cutting machines 10 and 50, the structure for applying tension and torsional force to the optical fiber 12 may be other than the above.

DESCRIPTION OF SYMBOLS 10,50 Optical fiber cutting machine 12 Optical fiber 14,16 Fixing part 22 Blade 38,40 Clamping part 38A, 40A Contact surface

Claims (2)

One fixing portion for fixing the bare fiber in the optical fiber in a state where tension and torsional force are applied to the optical fiber ;
In the position spaced apart in the optical axis direction of the one optical fiber and the one fixed part, the other fixed part that is fixed via the coating part in the optical fiber ,
A blade to cut along a direction inclined to said bare fibers to form a scratch on the bare fiber with respect to a direction perpendicular to the optical axis,
With
The one fixing part has a pair of holding parts for holding and fixing the bare fiber ,
At least one of the pair of sandwiching portions is made of metal,
The contact surface between the bare fibers in the sandwiching portion which is between the metal suppresses the possible flaw is formed in the surface portion of the bare fiber when the pair of holding portions has sandwiching the bare fiber Surface treatment is performed, and by the surface treatment, the surface roughness of the contact surface is JIS 10-point average roughness Rz of 6.3 μm or less,
The pair of sandwiching portions are configured to sandwich the bare fiber with a sandwiching force of 6N or more.
Fiber optic cutting machine. The pair of holding portions are configured for clamping the bare fiber in clamping force of more than 1.2N per 1mm of an optical axis direction,
The optical fiber cutting machine according to claim 1.

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