WO2022168920A1

WO2022168920A1 - Optical fiber cutting method and cutting kit

Info

Publication number: WO2022168920A1
Application number: PCT/JP2022/004282
Authority: WO
Inventors: 伸宏福浦; 紘一津田
Original assignee: 日東電工株式会社
Priority date: 2021-02-08
Filing date: 2022-02-03
Publication date: 2022-08-11
Also published as: TW202303204A

Abstract

This optical fiber cutting method comprises a first step and a second step. At the first step, a first optical fiber wire (21) that is an optical fiber provided with a first core (23) and a first cladding (24), and a second optical fiber wire (22) that is disposed in parallel with the first optical fiber wire (21) are prepared. At the second step, a common blade (4) is moved relative to the first optical fiber wire (21) and the second optical fiber wire (22) to cut the first optical fiber wire (21) and the second optical fiber wire (22). At the second step, the blade (4) cuts into the second optical fiber wire (22) before cutting of the first optical fiber wire (21) is complete.

Description

Optical fiber cutting method and cutting kit

The present invention relates to an optical fiber cutting method and a cutting kit.

A method of sequentially cutting a plurality of optical fibers with a disk-shaped cutting blade is known (see, for example, Patent Document 1 below). In the method described in Patent Document 1, a plurality of optical fibers arranged in the left-right direction are cut one by one by sliding a cutting blade in the left-right direction. The cut surface of the optical fiber after cutting is optically connected to another optical member.

JP 2014-153477 A

Flatness is required for the cut surface of the optical fiber in order to ensure optical connection reliability between the cut surface of the optical fiber and other optical members. However, in the method described in Patent Document 1, the pressure applied to the first optical fiber is abruptly reduced just before the end of cutting the first optical fiber. As a result, the cutting edge of the first optical fiber tends to wobble during movement, resulting in irregularities formed on the cutting surface of the first optical fiber. As a result, there is a problem that the optical connection reliability of the cut surface of the optical fiber is low.

The present invention provides an optical fiber cutting method and cutting kit capable of forming a flat cut surface.

The present invention (1) comprises a first step of preparing a first wire, which is an optical fiber comprising a core and a clad covering the core, and a second wire arranged in parallel with the first wire; relative to the first line and the second line to cut the first line and the second line, wherein the second step includes the first A method for severing an optical fiber is included wherein the blade cuts into the second wire before the severing of the wire is complete.

With this method, in the second step, the blade cuts into the second line before finishing the cutting of the first line. That is, the cutting of the first line is completed after the blade cuts into the second line. Therefore, it is possible to prevent the pressure exerted by the blade on the optical fiber from suddenly decreasing just before the end of cutting the first optical fiber. Therefore, it is possible to suppress the blurring of the blade. Therefore, the first wire can be stably cut. As a result, the cut surface of the first line can be made flat. Therefore, this first line has excellent optical connection reliability.

The present invention (2) includes the optical fiber cutting method according to (1), wherein the blade cuts into the second line when or before the blade cuts into the center of gravity of the first line.

With this method, the blade cuts into the second line when or before the blade cuts into the center of gravity of the first line, so vibration of the blade can be suppressed and the first line can be cut more stably.

According to the present invention (3), the optical fiber is cut according to (1) or (2), wherein the blade cuts into the second wire when or before the blade cuts into the core of the first wire. including methods.

With this method, the blade cuts into the second line when or before it cuts into the core of the first line, so vibration of the blade can be suppressed and the first line can be cut more stably.

The present invention (4) is the blade according to any one of (1) to (3), wherein the blade has a linear blade edge, and the direction along the blade edge is orthogonal to the moving direction of the blade. The described method for cutting an optical fiber is included.

With this method, the direction along the cutting edge and the moving direction of the blade are perpendicular to each other, so the area of the blade passing through the cross section of the optical fiber is reduced, and damage to the optical fiber can be reduced.

The present invention (5) includes the optical fiber cutting method according to any one of (1) to (4), wherein the second line is an optical fiber.

With this method, multiple optical fibers can be cut together.

The present invention (6) includes the optical fiber cutting method according to any one of (1) to (4), wherein the second line is a dummy fiber.

With this method, since the second line is a dummy fiber that does not transmit optical signals, even if the cut surface of the second line is uneven and not flat, it can be tolerated. In addition, by using a dummy fiber instead of an optical fiber for the second line, the yield of the optical fiber during manufacturing can be improved.

The present invention (7) is a cutting kit for performing the cutting method according to any one of (1) to (6), wherein the first wire and the second wire can be penetrated and held. and a linear blade edge, which is movable in a direction inclined in a direction in which the first line and the second line held by the holding member are aligned, and in a direction along the blade edge. a cutting kit comprising a blade movable in a direction perpendicular to the .

With this cutting kit, in the second step, the blade can cut into the second line before finishing the cutting of the first line. That is, the cutting of the first line can be finished after the blade cuts into the second line. Therefore, the first wire can be stably cut. Therefore, the cut surface of the first line can be made flat. As a result, the first line can be cut so as to have excellent optical connection reliability.

Also, with this cutting kit, the direction along the cutting edge and the moving direction of the blade can be orthogonal, so the area of the blade that passes through the cross section of the optical fiber is reduced, and damage to the optical fiber can be reduced.

According to the cutting method and cutting kit of the present invention, a flat cut surface can be formed.

1A to 1C are drawings for explaining one embodiment of the cutting method of the present invention. FIG. 1A is the first step. FIG. 1B is the second step, in which the blade cuts into the second optical fiber line. FIG. 1C shows the second step, in which the cutting of the first optical fiber line by the blade is completed. 2A to 2C are the second step corresponding to FIG. 1B. FIG. 2A shows how the blade cuts into the center of gravity of the first fiber optic line. FIG. 2B shows how the blade cuts into the first core of the first optical fiber line. FIG. 2C shows how the blade cuts through the first cladding above the first core. FIG. 3 is a cross-sectional view of a cutting kit and a first optical fiber line according to one embodiment of the present invention. FIG. 3 is a cross-sectional view along line XX of FIG. 1A. FIG. 4 shows a modification in which the direction along the cutting edge and the moving direction of the blade are inclined. FIG. 5 shows a modification in which the first optical fiber line, the second optical fiber line, and the dummy fiber are cut with a common blade.

<One embodiment>
One embodiment of an optical fiber cutting method and cutting kit is described with reference to FIGS. 1A-3. In order to clearly show the relative arrangement of the first optical fiber line 21, the second optical fiber line 22, and the blade 4 (described later), the connector 5 (see FIG. 3) is omitted in FIG.

<Cutting method>
A cutting kit 2 is used to cut the first optical fiber line 21 and the second optical fiber line 22 .

<Cutting kit>
As shown in FIG. 3, the cutting kit 2 comprises a holding member 3 and a blade 4. As shown in FIG.

The holding member 3 includes a connector 5, a ferrule 6, and an arrangement member 7.

The connector 5 integrally includes a guide portion 8 and a ferrule fixing portion 9 .

The guide portion 8 includes a first guide plate 11, a second guide plate 12, and a connecting portion 16. The first guide plate 11 and the second guide plate 12 are arranged to face each other with a gap therebetween. The facing direction of the first guide plate 11 and the second guide plate 12 is the front-rear direction. The second guide plate 12 side is the front side. The first guide plate 11 side is the rear side. The first guide plate 11 and the second guide plate 12 are parallel. The first guide plate 11 has a substantially rectangular shape when viewed from the front. In addition, front view means seeing from the front side. The first guide plate 11 has a first opening 13 penetrating in the front-rear direction. The first opening 13 has a substantially rectangular shape elongated in the left-right direction when viewed from the front side. The left-right direction is perpendicular to the front-rear direction and corresponds to the paper thickness direction in FIG. The first opening 13 is sized to encompass the first optical fiber line 21 and the second optical fiber line 22 . One first opening 13 is provided in the first guide plate 11 .

The second guide plate 12 has a substantially rectangular shape when viewed from the front. The second guide plate 12 has a second opening 14 penetrating in the front-rear direction. The second opening 14 has a substantially rectangular shape elongated in the left-right direction. The second opening 14 encompasses the first opening 13 when projected in the front-rear direction. The second opening 14 is sized to encompass the first optical fiber line 21 and the second optical fiber line 22 . One second opening 14 is provided in the second guide plate 12 .

The connecting portion 16 connects the lower end portion of the first guide plate 11 and the lower end portion of the second guide plate 12 . The communication portion 16 has a shape extending in the left-right direction.

The ferrule fixing portion 9 extends rearward from the rear surface of the first guide plate 11 . The ferrule fixing portion 9 has a rectangular tubular shape elongated in the left-right direction. The inside of the ferrule fixing portion 9 communicates with the first opening portion 13 .

The ferrule 6 has a shape that is short in the vertical direction and long in both the front-rear direction and the left-right direction. The ferrule 6 is inserted into the first opening 13 of the first guide plate 11 and the inside of the ferrule fixing portion 9 . The ferrule 6 is thereby fixed to the first guide plate 11 . The ferrule 6 has a plurality (two) of through holes 60 inside. The plurality of through holes 60 are spaced apart from each other in the left-right direction.

As shown in FIGS. 1A and 3 , the arranging member 7 is a arrangable member for arranging the first optical fiber line 21 and the second optical fiber line 22 . The arrangement member 7 is attached and fixed to the connector 5 . The arrangement member 7 is arranged on the front side of the second guide plate 12 . The arrangement member 7 has a plate shape that is thin in the front-rear direction. As shown in FIG. 1A, the locating member 7 has a plurality of

grooves

17,18. Each of the plurality of

grooves

17 and 18 is formed by cutting downward from the upper end surface of the arrangement member 7 when viewed from the front side. Each of the plurality of

grooves

17 and 18 is long in the vertical direction. The number of

grooves

17, 18 corresponds to the number of optical fibers. The plurality of

grooves

17 , 18 includes first grooves 17 and second grooves 18 .

The first groove 17 has a first bottom 19 . The shape of the first bottom portion 19 corresponds to the shape of the first optical fiber line 21 .

The second groove 18 is spaced to the left of the first groove 17 . The second groove 18 is vertically longer than the first groove 17 . The second groove 18 has a second bottom 20 . The shape of the second bottom portion 20 corresponds to the shape of the second optical fiber line 22 .

The cutting kit 2 is provided with one blade 4 . One blade 4 is commonly used for cutting the first optical fiber line 21 and the second optical fiber line 22 . The blade 4 has a substantially rectangular shape when viewed from the front. The blade 4 has a cutting edge 41 at its lower edge. The cutting edge 41 has a linear shape. The cutting edge 41 extends in the left-right direction.

The blade 4 is relatively movable with respect to the holding member 3. Specifically, the cutting edge 41 is relatively movable with respect to the first bottom portion 19 and the second bottom portion 20 . More specifically, the blade 4 is vertically movable. The holding member 3 is immovable. A cutting edge 41 is provided on the holding member 3 so as to be arranged between the first guide plate 11 and the second guide plate 12 .

<Cutting method>
A method of cutting the first optical fiber line 21 together with the second optical fiber line 22 using the cutting kit 2 will be described. A method for cutting the first optical fiber line 21 and the second optical fiber line 22 includes a first step and a second step.

<First step>
In the first step, the first optical fiber line 21 and the second optical fiber line 22 are prepared.

The first optical fiber line 21 is an optical fiber. The first optical fiber line 21 has a substantially circular cross section. The first optical fiber line 21 has a first core 23 as an example of a core and a first clad 24 as an example of a clad. The first core 23 has a substantially circular cross section. The first core 23 has a common axis with the first optical fiber line 21 . The first clad 24 is arranged on the outer peripheral surface of the first core 23 . The first clad 24 has a substantially annular cross section. The first clad 24 has an axis common to the first core 23 . The first clad 24 has a lower refractive index than the first core 23 . Examples of materials for the first optical fiber line 21 include resins and ceramics. Examples of resins include acrylic resins and epoxy resins. Examples of ceramics include glass. As the material of the first optical fiber line 21, resin is preferably used from the viewpoint of flexibility. In this case, the first optical fiber line 21 is referred to as a plastic optical fiber (POF) line. The dimensions of the first optical fiber line 21 are not particularly limited. The radius of the first optical fiber line 21 is, for example, 5 μm or more and, for example, 500 μm or less.

The second optical fiber line 22 is an optical fiber. The second optical fiber line 22 is arranged in parallel with the first optical fiber line 21 . The second optical fiber line 22 has the same configuration (including materials and dimensions) as the first optical fiber line 21 . Specifically, the second optical fiber line 22 has a second core 25 and a second clad 26 . The second core 25 and the second clad 26 have the same configuration (including materials and dimensions) as the first core 23 and the first clad 24, respectively.

Specifically, in the first step, the first optical fiber line 21 and the second optical fiber line 22 are set in the cutting kit 2 . Specifically, the first optical fiber line 21 and the second optical fiber line 22 are inserted into the holding member 3 .

First, each of the first optical fiber line 21 and the second optical fiber line 22 is inserted and penetrated through each of the plurality of through holes 60 of the ferrule 6 . Subsequently, the ferrule 6 is inserted into the ferrule fixing portion 9 and the first opening 13 of the first guide plate 11 . Then, the first optical fiber line 21 and the second optical fiber line 22 are inserted into the first opening 13 and the second opening 14, respectively.

Then, the arrangement member 7 is attached to the connector 5. A first fiber optic line 21 is secured to the first bottom portion 19 and a second fiber optic line 22 is secured to the second bottom portion 20 . A pressing member (not shown) is inserted into each of the first groove 17 and the second groove 18 from above the first optical fiber line 21 and the second optical fiber line 22 to The respective upper ends of the optical fiber lines 22 may be pressed toward the first bottom portion 19 and the second bottom portion 20 respectively. Thereby, the first optical fiber line 21 and the second optical fiber line 22 are held through the holding member 3 .

Accordingly, as shown in FIGS. 1A to 1C, the center of gravity of the first optical fiber line 21 does not overlap the center of gravity of the second optical fiber line 22 when projected in the horizontal direction. On the other hand, the lower edge of the first optical fiber line 21 overlaps, for example, the portion below the upper edge of the second optical fiber line 22 when projected in the horizontal direction.

Further, in the present embodiment, as shown in FIG. 1B, the upper edge of the second optical fiber line 22 overlaps, for example, the portion above the lower edge of the first optical fiber line 21 when projected in the horizontal direction. .

Preferably, the upper edge of the second optical fiber line 22 overlaps the center of gravity of the first optical fiber line 21 when projected, as shown in FIG. 2A, or the second optical fiber line 22, as shown in FIGS. 2B and 2C. It overlaps with the part above the center of gravity of the 1 optical fiber line 21 .

More preferably, the top edge of the second optical fiber line 22 overlaps the top edge of the first core 23 of the first optical fiber line 21, as shown in FIG. 2B, or the first core 23, as shown in FIG. It overlaps with the portion above the first core 23 in the clad 24 .

The angle between the vertical direction and the direction in which the first optical fiber line 21 and the second optical fiber line 22 are arranged includes an acute angle of inclination β. The tilt angle β is not particularly limited. The inclination angle β is, for example, 20 degrees or more, preferably 45 degrees or more, more preferably 60 degrees or more, still more preferably 70 degrees or more, particularly preferably 75 degrees or more, and for example, 89 degrees. Above, preferably above 85 degrees. The direction in which the first optical fiber line 21 and the second optical fiber line 22 are arranged is along the line passing through the center of gravity of the first optical fiber line 21 and the center of gravity of the second optical fiber line 22 in the cross section.

The distance P between the center of gravity of the first optical fiber line 21 and the center of gravity of the second optical fiber line 22 is not particularly limited. The distance P between the center of gravity of the first optical fiber line 21 and the center of gravity of the second optical fiber line 22 is, for example, 0.1 mm or more and 10 mm or less.

As shown in FIG. 2A, when the upper edge of the second optical fiber line 22 overlaps the center of gravity of the first optical fiber line 21, the following formula (A) is satisfied.
cosβ=R/P (A)
β: inclination angle between the vertical direction and the direction in which the first optical fiber line 21 and the second optical fiber line 22 are arranged R: the radius of the second optical fiber line 22 P: the center of gravity of the first optical fiber line 21 and the second light Distance from the center of gravity of the fiber line 22

The upper edge of the second optical fiber line 22 overlaps the center of gravity of the first optical fiber line 21, as shown in FIG. 2A, or the center of gravity of the first optical fiber line 21, as shown in FIGS. 2B and 2C. If it overlaps with the upper part, it satisfies the following formula (1).
cosβ≧R/P (1)
β: inclination angle between the vertical direction and the direction in which the first optical fiber line 21 and the second optical fiber line 22 are arranged R: the radius of the second optical fiber line 22 P: the center of gravity of the first optical fiber line 21 and the second light Distance from the center of gravity of the fiber line 22

In the second step, the common blade 4 is moved relative to the first optical fiber line 21 and the second optical fiber line 22 to cut the first optical fiber line 21 and the second optical fiber line 22. do. Specifically, the blade 4 is moved downward. Then, first, as shown in FIG. 1A, the cutting edge 41 cuts into the first optical fiber line 21 . Thereafter, as shown in FIG. 1B, the cutting edge 41 cuts into the second optical fiber line 22 .
After that, as shown in FIG. 1C, the cutting of the first optical fiber line 21 is completed. After that, the cutting of the second optical fiber line 22 is finished.

Preferably, the blade 4 cuts into the second optical fiber line 22 when the blade 4 cuts into the center of gravity of the first optical fiber line 21 (see FIG. 2A) or before that (see FIGS. 2B and 2C).

More preferably, the blade 4 cuts into the second optical fiber line 22 when the blade 4 cuts into the first core 23 of the first optical fiber line 21 (see FIG. 2B) or before that (FIG. 2C).

According to this method, in the second step, the blade 4 cuts into the second optical fiber line 22 before the cutting of the first optical fiber line 21 is completed, as shown in FIG. 1B. That is, as shown in FIG. 1C, the cutting of the first optical fiber line 21 is completed after the blade 4 cuts into the second optical fiber line 22 . Therefore, the sudden reduction of the pressure exerted by the blade 4 on the first optical fiber line 21 just before the end of cutting the first optical fiber line 21 is suppressed. Therefore, blurring of the blade 4 can be suppressed. Therefore, the first optical fiber line 21 can be stably cut. As a result, the cut surface of the first optical fiber line 21 can be made flat. Therefore, this first optical fiber line 21 is excellent in optical connection reliability.

When the blade 4 cuts into the center of gravity of the first optical fiber line 21 (see FIG. 2A), or before that (see FIGS. 2B and 2C), if the blade 4 cuts into the second optical fiber line 22, the blade 4 can be suppressed, and the first optical fiber line 21 can be cut more stably.

When the blade 4 cuts into the first core 23 of the first optical fiber line 21 (see FIG. 2B), or earlier (FIG. 2C) if the blade 4 cuts into the second optical fiber line 22, the blade 4 can be suppressed, and the first optical fiber line 21 can be cut more stably.

In this cutting method, since an example of the second line is the second optical fiber line 22, the first optical fiber line 21 and the second optical fiber line 22 can be cut together. In other words, a plurality of optical fibers can be cut together.

With this cutting kit 2, in the second step, the blade 4 can cut into the second optical fiber line 22 before the first optical fiber line 21 is completely cut, as shown in FIG. 1B. That is, as shown in FIG. 1C, the cutting of the first optical fiber line 21 can be completed after the blade 4 cuts into the second optical fiber line 22 . Therefore, the first optical fiber line 21 can be stably cut.
Therefore, the cut surface of the first optical fiber line 21 can be made flat. As a result, the first optical fiber line 21 can be cut so as to have excellent optical connection reliability.

[Modification of one embodiment]
In the following modified examples, the same reference numerals are given to the same members and steps as in the above-described embodiment, and detailed description thereof will be omitted. In addition, the modified example can have the same effects as the one embodiment, unless otherwise specified. Furthermore, one embodiment and its modifications can be combined as appropriate.

In one embodiment, the blade 4 is moved with respect to the first optical fiber line 21 and the second optical fiber line 22 . In a variant, the first optical fiber line 21 and the second optical fiber line 22 are moved relative to the blade 4 . In a variant, the blade 4 is immovable and the first optical fiber line 21 and the second optical fiber line 22 are movable. The cutting kit 2 is movable together with the first optical fiber line 21 and the second optical fiber line 22 .

In a modification, as shown in FIG. 4, the direction along the cutting edge 41 and the moving direction of the blade may be inclined. In this modification, for example, the direction in which the first optical fiber line 21 and the second optical fiber line 22 are arranged is the horizontal direction. The direction along the cutting edge 41 is a direction that inclines in both the left-right direction and the up-down direction. The moving direction of the blade 4 is the vertical direction as indicated by the solid line arrow in FIG. 4, or the horizontal direction as indicated by the phantom line arrow in FIG.

A modified example in which the blade 4 moves in the vertical direction is preferable to a modified example in which the blade 4 moves in the horizontal direction. The reason for this is that the area of the blade 4 passing through the respective cross sections of the first optical fiber line 21 and the second optical fiber line 22 becomes small, and the first optical fiber line 21 and the second optical fiber line 22 are damaged. reduction.

On the other hand, according to the method of one embodiment, as shown in FIGS. 1A to 1C, the direction along the cutting edge 41 and the moving direction of the cutting edge 4 are orthogonal to each other. The area of the blade 4 passing through each cross section of the optical fiber line 22 is reduced, and damage to the first optical fiber line 21 and the second optical fiber line 22 can be reduced. Therefore, one embodiment is preferable to the modified example described above.

In one embodiment, the second optical fiber line 22 is given as an example of the second line, but the second line may be a dummy fiber (not shown). The dummy fiber is configured to disable optical transmission. Specifically, the dummy fiber may have a first core 23 and a first cladding 24 similar to the first optical fiber line 21 . The ends in the direction in which the dummy fibers extend are closed. Alternatively, the dummy fiber may not have first core 23 and first clad 24 . Since the second line is a dummy fiber that does not transmit optical signals, even if the cut surface of the dummy fiber is uneven and not flat, it can be tolerated. Further, by using a dummy fiber instead of the second optical fiber line 22 as the second line, the yield of the first optical fiber line 21 during manufacturing can be improved.

As shown in FIG. 5, the first optical fiber line 21, the second optical fiber line 22, and the dummy fiber 27 can be cut with a common blade 4. The dummy fiber 27 is arranged on the opposite side of the first optical fiber line 21 to the second optical fiber line 22 . The arrangement of the dummy fiber 27 with respect to the second optical fiber line 22 is the same as the arrangement of the second optical fiber line 22 with respect to the first optical fiber line 21 . In this modification, the second optical fiber line 22 is an example of the second line and also an example of the first line. In the second step, the blade 4 cuts into the dummy fiber 27 before the cutting of the second optical fiber line 22 is completed. Thereby, in addition to the first optical fiber line 21, the cut surface of the second optical fiber line 22 can be flattened.

The number of optical fibers may be three or more. That is, any adjacent optical fibers are the first line and the second line. Furthermore, a dummy fiber may be arranged on the left side of the leftmost optical fiber among the plurality of optical fibers. In this case, the center of gravity of the dummy fiber is shifted downward from the center of gravity of the leftmost optical fiber.

In the modified example, the blade is a rotating blade. The cutting edge has an arc shape.

In a modification, the first optical fiber line 21 and/or the second optical fiber line 22 may have a rectangular cross section.

Although the above invention has been provided as an exemplary embodiment of the present invention, this is merely an illustration and should not be construed as limiting. Variations of the invention that are obvious to those skilled in the art are included in the following claims.

The cutting kit is used for cutting optical fibers.

2 cutting kit 3 holding member 4 blade 21 first optical fiber line 22 second optical fiber line 23 first core 24 first clad 27 dummy fiber 41 cutting edge

Claims

a first step of preparing a first wire, which is an optical fiber comprising a core and a clad covering the core, and a second wire arranged in parallel with the first wire;
a second step of moving a common blade relative to the first line and the second line to cut the first line and the second line;
In the second step, the optical fiber cutting method, wherein the blade cuts into the second line before the cutting of the first line is completed.
The method of cleaving an optical fiber according to claim 1, wherein the blade cuts into the second line when or before the blade cuts into the center of gravity of the first line.
The method for cutting an optical fiber according to claim 1 or 2, wherein the blade cuts into the second wire when or before the blade cuts into the core of the first wire.
The blade has a linear cutting edge,
The optical fiber cutting method according to any one of claims 1 to 3, wherein the direction along the blade edge and the moving direction of the blade are perpendicular to each other.
The method for cutting an optical fiber according to any one of claims 1 to 4, wherein the second wire is an optical fiber.
The optical fiber cutting method according to any one of claims 1 to 4, wherein the second line is a dummy fiber.
A cutting kit for carrying out the cutting method according to any one of claims 1 to 6,
a holding member capable of penetrating and holding the first line and the second line;
It has a linear blade edge, is movable in a direction inclined in a direction in which the first line and the second line held by the holding member are aligned, and is movable in a direction orthogonal to a direction along the blade edge. A cutting kit comprising a movable blade and a .