Cutting tool

Abstract

To provide a cutting tool which can improve machining accuracy of a plate-like heat insulation material.SOLUTION: A connection tool includes: a first portion which defines a first plane; a second portion which defines a second plane erecting perpendicularly to the first plane from the first plane; a first blade body which defines a third plane which is erect perpendicularly to the first plane from the first plane, is arranged opposite to the second plane, and has a cutting edge formed at an end edge on at least one side in a first direction along an intersection of the first plane and the third plane; and a second blade body which is arranged to face the first plane, defines a fourth plane connected to the second plane and the third plane, and has a cutting edge formed at the end edge on the one side in the first direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a cutting tool. [Background technology]

[0002] Generally, as shown in Fig. 4, a plaster board base 1200 for fixing a plaster board 1100 with screws is provided at an interior corner of a building wall. If the insulating material placed in the wall is made thicker and wider to further improve the thermal insulation, the insulating material may interfere with the plaster board base 1200. Therefore, at the construction site, the corner of the plate insulating material is cut into an L shape to match the shape of the plaster board base 1200, and the filled insulating material 1300 shown in Fig. 4 may be formed. Patent Document 1 describes a tool for cutting the plate insulating material into such an L shape. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 1-101490 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the tool described in Patent Document 1, the vertical knives and horizontal knives are easily deformed due to resistance force during cutting, and there is a risk that good processing precision cannot be obtained.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a cutting tool capable of improving the processing accuracy of plate-shaped insulation material. [Means for solving the problem]

[0006] A cutting tool according to a first aspect of the present invention comprises: (1) a first portion defining a first plane; a second portion defining a second plane that rises from the first plane perpendicular to the first plane; a first blade body defining a third plane that is perpendicular to the first plane and opposed to the second plane, and having a cutting edge formed on at least one edge in a first direction along an intersection line between the first plane and the third plane; a second blade body that is disposed opposite the first plane, defines a fourth plane that is continuous with the second plane and the third plane, and has a cutting edge formed on an edge on the one side in the first direction; A cutting tool comprising:

[0007] According to one embodiment of the present invention, a cutting tool comprises: (2) A cutting tool as described in (1) above, in which a cutting edge is formed on the other end edge of the first blade body in the first direction, and a cutting edge is formed on the other end edge of the second blade body in the first direction.

[0008] According to one embodiment of the present invention, a cutting tool comprises: (3) The edge on the one side of the first blade body is inclined with respect to a fifth plane perpendicular to the first direction, The edge on the one side of the second blade body is inclined with respect to the fifth plane. A cutting tool as described in (1) or (2) above.

[0009] According to one embodiment of the present invention, a cutting tool comprises: (4) The width of the first blade gradually decreases from the first flat surface side to the fourth flat surface side, The width of the second blade body gradually decreases from the third plane side toward the second plane side. The cutting tool is as described in (3) above.

[0010] According to one embodiment of the present invention, a cutting tool comprises: (5) The width of the first blade gradually decreases from the first flat surface side to the fourth flat surface side, The width of the second blade body gradually decreases from the second flat surface side to the third flat surface side. The cutting tool is as described in (3) above.

[0011] According to one embodiment of the present invention, a cutting tool comprises: (6) The first portion includes a connection portion capable of connecting a spacer disposed on the first plane. A cutting tool according to any one of (1) to (5) above.

[0012] According to one embodiment of the present invention, a cutting tool comprises: (7) The second portion includes a connection portion capable of connecting a spacer disposed on the second plane. A cutting tool according to any one of (1) to (6) above.

[0013] According to one embodiment of the present invention, a cutting tool comprises: (8) Either or both of the first and second parts are made of metal or ceramic. A cutting tool according to any one of (1) to (7) above.

[0014] According to one embodiment of the present invention, a cutting tool comprises: (9) One or both ends of the first portion in the first direction are bent toward an opposite side to the second blade body side. A cutting tool according to any one of (1) to (8) above.

[0015] According to one embodiment of the present invention, a cutting tool comprises: (10) One or both ends of the second portion in the first direction are bent toward an opposite side to the first blade body side. A cutting tool according to any one of (1) to (9) above.

[0016] According to one embodiment of the present invention, a cutting tool comprises: (11) The cutting tool according to any one of (1) to (8), wherein a cutting edge is formed on the edge on the one side in the first direction of the second portion. Effect of the Invention

[0017] According to the present invention, a cutting tool capable of improving the processing accuracy of plate insulation material can be provided. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 shows a cutting tool according to a first embodiment of the present invention. [Diagram 2] FIG. 4 shows a cutting tool according to a second embodiment of the present invention. [Diagram 3] FIG. 3 shows a cutting tool according to a third embodiment of the present invention; [Figure 4] FIG. 2 is a plan view showing a wall of a building with filled insulation placed therein. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of a cutting tool according to the present invention will be described by way of example with reference to the drawings. In the drawings, the same reference numerals are used to designate the same components.

[0020] 1 is a diagram showing a cutting tool 100 as a first embodiment of the cutting tool according to the present invention. The cutting tool 100 includes a first portion 110, a second portion 120, a first blade 130, and a second blade 140. The cutting tool 100 can cut a plastic foam board so that the end of the surface of the board becomes an L-shaped surface. The plastic foam board can be, for example, a phenol foam board, a bead-processed polystyrene foam board (EPS), an extruded polystyrene foam board (XPS), or the like.

[0021] The first portion 110 defines a first plane S1. The first portion 110 may be flat. More specifically, the first portion 110 includes a main surface 110m that slides against the surface of the plastic foam board when cutting the plastic foam board. The main surface 110m of the first portion 110 defines the first plane S1. The first portion 110 may include a handle 110f in the center between the second portion 120 and the first blade 130 in a second direction d2 described later on the surface opposite to the main surface 110m. The handle 110f may be attached to the surface and may be composed of a rectangular parallelepiped with a longitudinal direction in a first direction d1 described later and an ellipsoid provided on the upper part of the rectangular parallelepiped.

[0022] The second portion 120 defines a second plane S2 that stands perpendicular to the first plane S1 from the first plane S1. The second portion 120 may be flat. More specifically, the second portion 120 includes a main surface 120m that slides against an end surface perpendicular to the surface of the plastic foam board during cutting of the plastic foam board. The main surface 120m of the second portion 120 defines the second plane S2.

[0023] The first blade body 130 defines a third plane S3 that stands perpendicular to the first plane S1 defined by the first portion 110 and faces the second plane S2. More specifically, the first blade body 130 has a main surface 130m that faces the second plane S2. The main surface 130m of the first blade body 130 defines the third plane S3. The first blade body 130 is flat in such a way that the direction perpendicular to the first plane S1 is the in-plane direction and the direction facing the second plane S2 is the thickness direction. The plate thickness of the first blade body 130 may be, for example, 0.03 to 2.0 mm. The first blade body 130 cuts the plastic foam board with a cutting edge described later during cutting of the plastic foam board. The first blade 130 rises from the center of the first portion 110 in the second direction d2, which will be described later, but is not limited to this configuration.

[0024] The second blade body 140 defines a fourth plane S4 that is disposed opposite the first plane S1. More specifically, the second blade body 140 has a main surface 140m that is disposed opposite the first plane S1. The main surface 140m of the second blade body 140 defines the fourth plane S4. The fourth plane S4 is connected to the second plane S2 and the third plane S3. The fourth plane S4 of this embodiment stands perpendicular to the second plane S2. Furthermore, the fourth plane S4 of this embodiment stands perpendicular to the third plane S3 as well. The second blade body 140 of this embodiment is a flat plate in which the direction perpendicular to the second plane S2 and the third plane S3 is the in-plane direction, and the direction facing the first plane S1 is the thickness direction. The plate thickness of the second blade body 140 may be, for example, 0.03 to 2.0 mm. During cutting of the plastic foam board, the second blade 140 cuts the plastic foam board with a cutting edge, which will be described later.

[0025] Hereinafter, the direction along the intersection line l1 between the first plane S1 and the third plane S3 will be referred to as the "first direction d1". The intersection line between the first plane S1 and the second plane S2 also extends in the first direction d1. Cutting edges are formed on the edges 130t1 and 130t2 on at least one side (both sides in this embodiment) of the first blade body 130 in the first direction d1. Cutting edges are formed on the edges 140t1 and 140t2 on the one side (both sides in this embodiment) of the second blade body 140 in the first direction d1.

[0026] "A cutting edge is formed on the edge of the blade" means that the edge of the blade is formed so that the edge is thinner (sharper) toward the edge. Therefore, the cutting edge of the first blade 130, the second blade 140, or the second part 320 described later may be a single-edged edge, or may be a double-edged edge as shown in Figures 1 to 3.

[0027] Hereinafter, the direction perpendicular to the first direction d1 and perpendicular to the second plane S2 and the third plane S3 will be referred to as the "second direction d2".

[0028] Here, when cutting the plate-shaped insulation material with the tool described in Patent Document 1, it is necessary to move the tool in one direction to cut. Therefore, when the tool is removed from the cut plate-shaped insulation material, the end of the plate-shaped insulation material may be chipped, and good processing accuracy may not be obtained. In this embodiment, cutting edges are formed on both ends (ends on one side and the other side) 130t1, 130t2 of the first blade 130 in the first direction d1, and cutting edges are formed on both ends (ends on one side and the other side) 140t1, 140t2 of the second blade 140 in the first direction d1. Since cutting edges are formed on both ends 130t1, 130t2, 140t1, 140t2 in the first direction d1 of each of the first blade body 130 and the second blade body 140, the cutting tool 100 can cut a plastic foam board by moving it to one side in the first direction d1, and can also cut a plastic foam board by moving it to the other side in the first direction d1. Therefore, with the cutting tool 100, a user can cut a plastic foam board by pulling the cutting tool 100 toward the user, and can also cut a plastic foam board by pushing the cutting tool 100 toward the user, opposite to the user.

[0029] Therefore, according to the cutting tool 100, when cutting the plastic foam board, the cutting tool 100 does not need to be moved to only one side in the first direction d1 to cut. In other words, according to the cutting tool 100, by utilizing the movement to both sides in the first direction d1, it is possible to suppress chipping and loss of the end of the plastic foam board when the cutting tool 100 is removed from the plastic foam board. For example, the user moves the cutting tool 100 to one side in the first direction d1 from one end surface of the plastic foam board toward the other end surface to perform the first cutting process of the plastic foam board. Then, the cutting of the plastic foam board is temporarily stopped at any position between the one end surface and the other end surface of the plastic foam board. Next, the user moves the cutting tool 100 back to the other side in the first direction d1 and removes the cutting tool 100 from the one end surface side of the plastic foam board. After that, the user moves the cutting tool 100 to the other end surface of the plastic foam board, and moves the cutting tool 100 from the other end surface of the plastic foam board toward the one end surface to the other side in the first direction d1 to perform the second cutting process of the plastic foam board. Then, the cutting tool 100 is moved to the position cut in the first cutting process, and the cutting process of the plastic foam board is completed. In this way, it is possible to prevent the end of the plastic foam board from being chipped and missing during the cutting process of the plastic foam board. In this way, the cutting tool 100 can prevent the processing accuracy of the plastic foam board from decreasing. The cutting tool 200 described later can also cut the plastic foam body by the method described here.

[0030] In addition, when cutting a plastic foam board, if the cutting tool 100 is moved only to one side of the first direction d1, that is, toward the user, when cutting of the plastic foam board is completed, the cutting edge of the cutting tool 100 will come out from the plastic foam board in a direction toward the user. As a result, there is a risk that the cutting edge of the cutting tool 100 will pose a danger to the user. On the other hand, by utilizing movement to both sides in the first direction d1, cutting can be performed so that the cutting edge of the cutting tool 100 will not come out from the end face of the plastic foam board when cutting of the plastic foam board is completed. As a result, the safety of the user can be improved.

[0031] As described above, the fourth plane S4 defined by the second blade body 140 is continuous with the third plane S3 defined by the first blade body 130. The first blade body 130 and the second blade body 140 receive resistance from the plastic foam board when cutting the plastic foam board, and this configuration can reduce deformation due to the resistance. As a result, deterioration in processing accuracy of the plastic foam board due to deformation of the first blade body 130 and the second blade body 140 during cutting processing of the plastic foam board can be suppressed. As described above, the cutting tool 100 can improve processing accuracy of the plastic foam board.

[0032] At least one edge 130t1, 130t2 on one side (both sides in this embodiment) of the first blade body 130 in the first direction d1 may be inclined with respect to a fifth plane S5 perpendicular to the first direction d1. At least one edge 140t1, 140t2 on one side (both sides in this embodiment) of the second blade body 140 in the first direction d1 may be inclined with respect to the fifth plane S5. In other words, the edges 130t1, 130t2 of the first blade body 130 and the edges 140t1, 140t2 of the second blade body 140 may be inclined with respect to the first direction d1. By inclining the edges 130t1, 130t2, 140t1, 140t2 of the blade body with respect to the fifth plane S5, it may be easier to cut the plastic foam board with the blade body. The inclination angle of the edges 130t1, 130t2, 140t1, 140t2 is not particularly limited. The inclination angles may, for example, be equal to one another, for example 45°, or may, for example, be different from one another.

[0033] The cutting edge of the edge 130t1 of the first blade body 130 and the cutting edge of the edge 140t1 of the second blade body 140 may be continuous at the connecting portion P1 of the first blade body 130 and the second blade body 140. Similarly, the cutting edge of the edge 130t2 of the first blade body 130 and the cutting edge of the edge 140t2 of the second blade body 140 may be continuous at the connecting portion P2 of the first blade body 130 and the second blade body 140. With this configuration, the resistance force applied to the cutting tool 100 during cutting can be reduced compared to a configuration in which the cutting edges are not continuous at the connecting portions P1 and P2, and the workability of the cutting can be improved.

[0034] In this embodiment, the blade-to-blade angle θ1 (in the bottom view shown in FIG. 1) between the cutting edge of the edge 130t1 of the first blade body 130 and the cutting edge of the edge 140t1 of the second blade body 140 is an obtuse angle. The blade-to-blade angle θ2 (in the bottom view shown in FIG. 1) between the cutting edge of the edge 130t2 of the first blade body 130 and the cutting edge of the edge 140t2 of the second blade body 140 is also an obtuse angle. With these configurations, when cutting a plastic foam board with the cutting tool 100, the first blade body 130 and the second blade body 140 moving in the first direction d1 cut the plastic foam board at different times. As a result, the resistance force applied to the cutting tool can be reduced when cutting a plastic foam board. The blade-to-blade angles θ1 and θ2 are not particularly limited except that they are obtuse angles. The inter-blade angles θ1 and θ2 may be equal to each other, for example, 135°, or may be different from each other, for example.

[0035] The width of the first blade body 130 may be gradually decreased from the first plane S1 side toward the fourth plane S4 side. The width of the second blade body 140 may be gradually decreased from the third plane S3 side toward the second plane S2 side. The width of the first blade body 130 is the length in the first direction d1. The width of the second blade body 140 is also the length in the first direction d1. The specific shapes of the first blade body 130 and the second blade body 140 whose widths are gradually decreased are not particularly limited. As in this embodiment, the first blade body 130 and the second blade body 140 may be, for example, trapezoidal plate-shaped. In addition, the outer edge shapes on both sides of the first direction d1 of each of the first blade body 130 and the second blade body 140 are not limited to the straight line shape of this embodiment, and may be, for example, arc-shaped.

[0036] In the first portion 110, a through hole 110h may be formed between the second portion 120 and the first blade 130 as a connection portion to which a spacer can be connected. In the second portion 120, a through hole 120h may be formed between the first portion 110 and the second blade 140 as a connection portion to which a spacer can be connected. In FIG. 1, the number of through holes 110h, 120h is two each. However, the number of through holes may be one or three or more.

[0037] A spacer arranged on the first plane S1 defined by the first part 110 can be connected to the through hole 110h as a connecting part. A spacer arranged on the second plane S2 defined by the second part 120 can be connected to the through hole 120h as a connecting part. In this embodiment, a bolt is fastened to the nut while passing through the spacer and the through hole 110h or 120h. The spacer may be connected to the through hole 110h or 120h by passing a screw through the through hole 110h or 120h. In this manner, the spacer can be connected to the first plane S1 defined by the first part 110 and the second plane S2 defined by the second part 120. The spacer fixed on the first plane S1 may be a rectangular parallelepiped member, such as a plate-like member, stacked on the first plane S1. The spacer fixed on the second plane S2 may also be a rectangular parallelepiped member, such as a plate-like member, stacked on the second plane S2. By connecting the spacer to the connecting portion, the spacer slides on the plastic foam plate, not the first portion 110 and the second portion 120. As a result, the size of the portion of the plastic foam plate cut by the cutting tool 100 can be adjusted (reduced). Note that a plurality of spacers may be connected to one through hole 110h or 120h. Also, a plurality of through holes 110h may be formed in the first portion 110, and separate spacers may be connected to each through hole 110h. Similarly, a plurality of through holes 120h may be formed in the second portion 120, and separate spacers may be connected to each through hole 120h. Furthermore, when a plurality of spacers are connected to one or more through holes 110h of the first portion 110, the shapes of the plurality of spacers may be the same or different. Similarly, when a plurality of spacers are connected to one or more through holes 120h of the second portion 120, the shapes of the plurality of spacers may be the same or different.

[0038] The spacer may be connected to the first portion 110 or the second portion 120 by an adhesive.

[0039] Either or both ends 110e1, 110e2 in the first direction d1 of the first portion 110 may be bent toward the opposite side to the second blade body 140 side. Either or both ends 120e1, 120e2 in the first direction d1 of the second portion 120 may be bent toward the opposite side to the first blade body 130 side. With these configurations, when starting cutting of the plastic foam board, the end face of the first direction d1 of the first portion 110 and / or the end face of the first direction d1 of the second portion 120 may be less likely to get caught on the end face of the plastic foam board. As a result, the workability of cutting the plastic foam board by the cutting tool 100 can be improved. The bending angles of these ends 110e1, 110e2, 120e1, 120e2 are not particularly limited, but may be, for example, 10°.

[0040] The cutting tool 100 may be made of metal or ceramic. More specifically, either or both of the first part 110 and the second part 120 may be made of metal or ceramic. This configuration can reduce the frictional force when the first part 110 and the second part 120 of the cutting tool 100 slide on the plastic foam board. As a result, the workability of cutting the plastic foam board with the cutting tool 100 can be improved.

[0041] 2 is a diagram showing a cutting tool 200 as a second embodiment of the cutting tool according to the present invention. In the following, configurations similar to those of the cutting tool 100 will not be described again, but configurations different from those of the cutting tool 100 will be described.

[0042] 2, the width of the second blade body 240 may gradually increase from the third plane S3 side toward the second plane S2 side. The specific shape of the second blade body 240 whose width gradually increases is not particularly limited. As in this embodiment, the second blade body 240 may be, for example, a trapezoidal plate shape. In addition, the outer edge shape of the second blade body 240 on both sides in the first direction d1 is not limited to the linear shape of this embodiment, and may be, for example, an arc shape.

[0043] In this embodiment, the inter-blade angle θ1' between the cutting edge of the edge 230t1 of the first blade body 230 and the cutting edge of the edge 240t1 of the second blade body 240 is an acute angle. The inter-blade angle θ2' between the cutting edge of the edge 230t2 of the first blade body 230 and the cutting edge of the edge 240t2 of the second blade body 240 is also an acute angle. With these configurations, the cutting edge of the edge 230t1 of the first blade body 230 and the cutting edge of the edge 240t1 of the second blade body 240 at least partially overlap in the first direction d1. As a result, the size of the cutting tool 200 in the first direction d1 is reduced, and the cutting tool 200 can be made smaller. The inter-blade angles θ1' and θ2' are not particularly limited except that they are acute angles. The inter-blade angles θ1', θ2' may be equal to each other, for example, 45°, or may be different from each other, for example.

[0044] 3 is a diagram showing a cutting tool 300 as a third embodiment of the cutting tool according to the present invention. In the following, configurations similar to those of the cutting tool 100 or 200 will not be described again, but configurations different from those of the cutting tool 100 or 200 will be described.

[0045] A cutting edge is formed on one edge of the second portion 320 in the first direction d1, i.e., the edge on the side where the cutting edges are formed in the first blade body 130 and the second blade body 140. In the first blade body 130 and the second blade body 140 of this embodiment, cutting edges are formed on both edges 130t1, 130t2, 140t1, 140t2 in the first direction d1. In this case, cutting edges may be formed on both edges of the second portion 320 in the first direction d1.

[0046] For example, referring to Fig. 4, when filling insulation material 1300 has already been placed between pillar 1400 and stud 1500, cutting tool 300 can cut filling insulation material 1300 into an L-shape to match the shape of gypsum board base 1200 adjacent to pillar 1400. Specifically, the user moves cutting tool 300 near pillar 1400 from the end face of filling insulation material 1300 on the front side of the page in Fig. 4 toward the end face on the back side of the page in Fig. 4, or moves it in the opposite direction.

[0047] At least one edge 320t1, 320t2 (both edges in this embodiment) of the second portion 320 on which the cutting edge is formed may be inclined with respect to a fifth plane S5 perpendicular to the first direction d1. In other words, at least one edge 320t1, 320t2 of the second portion 320 on which the cutting edge is formed may be inclined with respect to the first direction d1. This configuration may facilitate cutting of the plastic foam board by the second portion 320. The inclination angles of the edges 320t1, 320t2 are not particularly limited. The inclination angles may be equal to each other, for example, 45°. The inclination angles of the edges 320t1, 320t2 may be different from each other, for example.

[0048] 1 and 2, the inclined portions (cutting edges) of the second portion 320 and the first blade body 330 may extend to both ends in the first direction d1 of the first portion 110 at the ends on the first plane S1 side. In other words, the inclined portions of the second portion 320 and the first blade body 330 in Fig. 3 may extend to both ends 110e1, 110e2 in the first direction d1 of the first portion 110, unlike the inclined portions of the second portion 120 and the first blade body 130 in Fig. 1 and 2.

[0049] The width of the second portion 320 may be gradually decreased from the first plane S1 side toward the fourth plane S4 side. The width of the second portion 320 refers to the length in the first direction d1. The specific shape of the second portion 320 whose width is gradually decreased is not particularly limited. As in this embodiment, the second portion 320 may be, for example, a trapezoidal plate shape. In addition, the shape of the outer edges of the second portion 320 on both sides in the first direction d1 is not limited to the straight line shape of this embodiment, and may be, for example, an arc shape.

[0050] Either or both ends 110e1, 110e2 of the first portion 110 in the first direction d1 are not bent with respect to the second blade body 140. In other words, the first portion 110 extends parallel to the first direction d1. Either or both ends 320e1, 320e2 of the second portion 320 in the first direction d1 are not bent with respect to the first blade body 330 (second direction d2). In other words, the second portion 320 extends parallel to the first direction d1. [Explanation of symbols]

[0051] 100,200,300: Cutting tool 110: Part 1 110e1: End 110f: Handle 110h: Through hole 120,320: 2nd part 320t1,320t2:Edge 120e1: End 120h: Through hole 130,230,330: 1st blade body 130t1,130t2,230t1,230t2,330t1,330t2:Edge 140,240:Second blade body 140t1,140t2,240t1,240t2:Edge

Claims

1. a first portion defining a first plane; a second portion defining a second plane that rises from the first plane perpendicular to the first plane; a first blade body defining a third plane that stands perpendicular to the first plane from the first plane and faces the second plane, and having a cutting edge formed on at least one edge in a first direction along an intersection line between the first plane and the third plane; a second blade body that is disposed opposite the first plane, defines a fourth plane that is continuous with the second plane and the third plane, and has a cutting edge formed on an edge on the one side in the first direction; Cutting tools including.

2. The cutting tool according to claim 1 , wherein a cutting edge is formed on an edge of the first blade body on the other side in the first direction, and a cutting edge is formed on an edge of the second blade body on the other side in the first direction.

3. The edge on the one side of the first blade body is inclined with respect to a fifth plane perpendicular to the first direction, The cutting tool according to claim 1 or 2, wherein the edge on the one side of the second blade is inclined with respect to the fifth plane.

4. The width of the first blade body gradually decreases from the first plane side toward the fourth plane side, The width of the second blade body gradually decreases from the third plane side toward the second plane side. A cutting tool according to claim 3.

5. The width of the first blade body gradually decreases from the first plane side toward the fourth plane side, The width of the second blade body gradually decreases from the second plane side toward the third plane side. A cutting tool according to claim 3.

6. The cutting tool according to claim 1 or 2, wherein the first portion includes a connecting portion capable of connecting a spacer arranged on the first plane.

7. The cutting tool according to claim 1 or 2, wherein the second portion has a connecting portion capable of connecting a spacer arranged on the second plane.

8. 3. The cutting tool according to claim 1 or 2, wherein either or both of the first and second parts are made of metal or ceramic.

9. The cutting tool according to claim 1 or 2, wherein one or both ends of the first portion in the first direction are bent toward an opposite side to the second blade body.

10. The cutting tool according to claim 1 or 2, wherein one or both ends of the second portion in the first direction are bent toward an opposite side to the first blade body.

11. The cutting tool according to claim 1 or 2, wherein a cutting edge is formed on an edge of the second portion on the one side in the first direction.

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