JP6648912B1 - Cutting tool - Google Patents

Abstract

An object of the present invention is to provide a cutting blade capable of effectively preventing a position of a notch generating blade from being shifted with respect to a blade main body. A cutting blade (1) for forming a slit in a sheet material, comprising: a blade main body (2); a groove cutting blade (3) forming a slit; and a notch generating blade (4) forming an end of the slit. The blade main body 2 is formed in a fan shape, has a bolt hole 21 at one end side, and the groove cutting blades 3 are provided along both side edges in the thickness direction of the blade main body 2, respectively. The blade 4 includes a mounting portion 41 detachably attached to one end of the blade main body 2 and a blade edge portion 42 formed at one end of the mounting portion 41. One surface on the side that is formed corresponding to the hole 21 and that is in contact with a bolt head of a bolt 50 provided in the bolt hole 21 through the through hole and a long hole-shaped through hole extending along the radial direction of the blade body 2. Characterized by having a rough surface formed thereon. Cross-sectional processing tool 1. [Selection diagram] Fig. 1

Description

  The present invention relates to a cutting tool. In particular, the present invention relates to a cutting blade for forming a slit in a sheet material such as a cardboard sheet.

  2. Description of the Related Art As a packaging box for storing or moving objects, a cardboard box manufactured by assembling a cardboard sheet 100 as shown in FIG. 12 is known. The upper lid and the bottom plate of the corrugated cardboard box are formed by forming slits 101 and 102 in a part of the corrugated cardboard sheet 100 and folding the separated parts so as to overlap each other.

  In forming the slits 101 and 102, a groove cutting device is generally used, and a cutting blade 60 as shown in FIG. 13 is often used for the groove cutting device.

  In this cutting blade 60, a notch generating blade 62 and a groove cutting blade 63 are integrally formed in a blade main body 61 formed in a fan shape. The cut generation blade 62 protrudes radially outward from one end of the outer peripheral surface of the blade main body 61 so as to be flush with the end surface of the blade main body 61, and includes corner portions 64 on both sides in the width direction of the end surface. I have. The groove cutting blades 63 are provided on both sides in the thickness direction of the blade main body 61 along the outer peripheral surface of the blade main body 61, respectively.

  The cutting blade 60 is attached to a grooving device 70 as shown in FIGS. 14 and 15. FIG. 14 is a side view showing a schematic configuration of the groove cutting device, and FIG. 15 is a front view. Two knives 60 for cutting described above are attached to this grooving device 70, and the configuration of the grooving device 70 will be described below with the respective knives as cutting knives 60a and 60b.

  The groove cutting device 70 includes an upper rotation shaft 71 and a lower rotation shaft 72. The upper rotation shaft 71 and the lower rotation shaft 72 are arranged in parallel with each other so as to face each other with the sheet feeding line L interposed therebetween, and a pair of disk-shaped upper rotation holders 73 and 73 and a pair of lower rotation shafts are respectively provided. Rotary holders 74 are provided.

  Two cutting blades 60a, 60b are respectively held between the pair of upper rotating holders 73, 73 by fasteners (not shown) such as bolts. These cutting blades 60a, 60b are spaced at a predetermined interval along the outer periphery of the pair of rotary holders 73, 73, and the respective cutting generation blades 62a, 62b face each other in the outer peripheral direction. It is attached. On the other hand, two receiving blades 75, 75 are attached to the opposing surfaces of the pair of lower rotary holders 74, 74 at predetermined intervals corresponding to the thickness dimensions of the cutting blades 60a, 60b. Can be

  Next, a method of forming a slit in the corrugated cardboard sheet 100 using the groove cutting device 70 having the above configuration will be described. As shown in FIG. 14, the corrugated cardboard sheet 100 is moved along the sheet feeding line L of the groove cutting device 70 in a state where the upper rotary holders 73 and 73 and the lower rotary holders 74 and 74 are rotated. The sheet is fed to the groove cutting device 70 from the right side. As a result, the cutting blade 60a is inserted into the gap between the receiving blades 75, 75, and the corrugated cardboard sheet 100 is cut, thereby forming a front slit 101 having the terminal end 103 as an end point as shown in FIG. Similarly, the other cutting blade 60b is sandwiched between the receiving blades 75, 75, and the corrugated cardboard sheet 100 is cut, so that the rear slit 102 starting from the start end 104 is formed.

  Here, when cutting a corrugated cardboard sheet using a cutting blade as shown in FIG. 13, the cut generation blades 62 that form the slit end portions (end portion 103 and start end portion 104) form slit side edges. The problem is that the cutting blade 60 has to be replaced due to the wear of the notch generating blade 62 even though the groove cutting blade 63 is still usable, even though the groove cutting blade 63 is still usable. was there.

  In order to cope with such a problem, there has been known a cutting blade configured so that the cut generation blade 62 can be detachably attached to the blade main body 61. Specifically, Patent Literature 1 below discloses that a notch generating blade is fixed to one end side of a blade body formed in a fan shape via a fastener such as a bolt. No. 2 discloses an incision generation blade attached to a blade main body, which is configured to be able to adjust an amount of protrusion of the cutting edge portion from the blade main body.

Japanese Utility Model Publication No. 06-001356 JP 2005-186261 A

  The cutting blades disclosed in Patent Document 1 and Patent Document 2 have an excellent effect that only a cutting generation blade with severe wear conditions can be replaced, but the cutting generation blade has a problem. There has been a problem that the position of the notch generation blade may be shifted due to an impact when inserted into the corrugated cardboard sheet. Specifically, the notch generation blade is moved radially inward of the blade main body due to an impact at the time of abutting / piercing with the corrugated cardboard sheet, and an appropriate position of the cutting edge at the tip of the notch generation blade. (The amount of protrusion from the outer peripheral edge of the blade main body) cannot be maintained. As a result, the slit end cannot be formed, or even if formed, the slit end is torn.

  The present invention has been made in order to solve such a problem, and an object of the present invention is to provide a cutting tool that can effectively prevent a position shift of a notch generation blade with respect to a blade body. .

The object of the invention is a cutting machining tool for forming a slit in the sheet material, and cutting tool body, a groove cutting blades to form a slit, and a switching write generation blade forming an end of the slit The blade body is formed in a fan shape, and has a bolt hole on one end side, and the groove cutting blades are respectively provided along both side edges in the thickness direction of the blade body, and The blade includes a mounting portion detachably attached to one end of the blade main body, and a cutting edge formed at one end of the mounting portion, and the mounting portion corresponds to a bolt hole of the blade main body. Formed on one surface of a side that comes into contact with a bolt head of a bolt installed in the bolt hole through the through hole and a long hole-shaped through hole along the radial direction of the blade main body. and a rough surface that, the rough surface portion, prior to The one surface of the mounting portion is formed by forming a plurality of linear grooves, each linear groove is formed to extend in a direction perpendicular to a radial direction of the blade body, The mounting portion includes a side surface portion along the radial direction of the blade main body, and the side surface portion includes a marking portion indicating a position corresponding to one end of each of the linear grooves . Achieved by a knife.

  Preferably, the linear grooves are arranged at equal intervals along the radial direction of the blade main body.

  Further, it is preferable that the marking portion is formed by forming a plurality of linear grooves in the side surface portion of the mounting portion.

  Further, one end of each linear groove formed on the one surface of the mounting portion reaches a side edge which is a boundary with the side surface portion, and each linear groove forming the marking portion is provided with the mounting groove. Preferably, it is connected to one end of each linear groove formed on the one surface of the portion.

  Further, the cutting edge of the cut generation blade may be configured as a flat blade. The cut generation blade may be configured to include the semi-cylindrical blade tip.

  Further, the notch generation blade may be configured to have a blade notch at the tip of the blade part.

  It is preferable that the width of the cut generation blade is substantially the same as the thickness of the blade main body.

  Further, it is preferable that the cutting edge portion is disposed radially outward of an outer peripheral edge of the blade main body so as to be capable of holding the cut generation blade.

  ADVANTAGE OF THE INVENTION According to this invention, the cutting blade for cutting which can effectively prevent the position shift of the cutting generation blade with respect to a blade main body can be provided.

It is a top view of the blade for cutting concerning one embodiment of the present invention. It is an enlarged view in the AA cross section of FIG. It is a principal part enlarged plan view which shows the modification of the groove cutting blade in the cutting tool shown in FIG. It is a principal part enlarged plan view which shows the modification of the groove cutting blade in the cutting tool shown in FIG. (A) is a top view of the cutting generation blade with which the cutting tool shown in FIG. 1 is provided, (b) is a side view when viewed from the arrow B direction in (a), and (c). () Is a side view when viewed from the direction of arrow C in (a), and (d) is a side view when viewed from the direction of arrow D in (a). It is explanatory drawing for demonstrating the effect of the cutting blade shown in FIG. It is a figure which shows the modification of the cutting generation blade with which the cutting blade shown in FIG. 1 is provided, (a) is a top view of the cutting generation blade with which the cutting blade is provided, (b) is ( It is a side view when seen from the arrow B direction in a), (c) is a side view when seen from the arrow C direction in (a), (d) is an arrow in (a). It is a side view at the time of seeing from the visual D direction. It is explanatory drawing for demonstrating the effect of the cutting tool which has a cutting generation blade shown in FIG. It is a figure which shows the modification of the cutting generation blade with which the cutting blade shown in FIG. 1 is provided, (a) is a top view of the cutting generation blade with which the cutting blade is provided, (b) is ( It is a side view when seen from the arrow B direction in a), (c) is a side view when seen from the arrow C direction in (a), (d) is an arrow in (a). It is a side view at the time of seeing from the visual D direction. (A) is a top view which shows the modification of the cut generation blade shown in FIG. 5, and (b) is a top view which shows the modification of the cut generation blade shown in FIG. It is a top view which shows the modification of the blade main body with which the cutting blade for cutting shown in FIG. 1 is provided. FIG. 3 is a schematic plan view of the corrugated cardboard sheet after a slit is formed. It is a top view of the conventional cutting tool. FIG. 14 is a side view showing a schematic configuration of a grooving device to which the cutting blade shown in FIG. 13 is attached. FIG. 14 is a front view showing a schematic configuration of a grooving device to which the cutting blade shown in FIG. 13 is attached.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Each figure is partially enlarged or reduced for easy understanding of the configuration. FIG. 1 is a plan view showing a cutting blade according to an embodiment of the present invention, and FIG. 2 is an enlarged view of an AA cross section thereof. The cutting blade 1 is a blade for forming a slit in a sheet material such as a corrugated cardboard sheet or a synthetic resin sheet while rotating. As shown in FIGS. 1 and 2, a cutting blade body 2 and a groove cutting blade are provided. 3 and a cut generation blade 4.

  The blade main body 2 is formed of a metal material such as stainless steel, iron, or tool steel, and has a fan shape in plan view as shown in FIG. The blade main body 2 has two bolt holes 21 on one end side (one side surface side of the blade main body 2). The bolt hole 21 is a hole for attaching the cut generation blade 4 to the blade main body 2 with a bolt 50. The two bolt holes 21 are formed side by side along the radial direction of the blade body 2.

  The grooving blade 3 is arranged along the outer peripheral portion of the blade main body 2 similarly to the conventional cutting blade 60 (see FIG. 13). Since the groove cutting blade 3 in the present embodiment is configured to perform slit processing on the sheet material, as shown in FIG. 2, the groove cutting blade 3 is provided on each side edge of the blade body 2 in the thickness direction. The specific form of the groove cutting blade 3 is not particularly limited. For example, the groove cutting blade 3 may be formed in a saw-tooth shape as shown in a main part enlarged plan view of FIG. When the groove cutting blade 3 is formed in a saw tooth shape, the distance S between the vertices 3a of the adjacent saw teeth 3 is formed, for example, to be 2.0 mm to 4.0 mm. It is preferable that the maximum height H be formed to be, for example, 2.0 mm to 3.5 mm. When the groove cutting blade 3 is formed in a saw-tooth shape, as shown in FIG. 3, the contour shape 3b of the saw tooth 3 interposed between the vertices 3a of each saw tooth 3 becomes V-shaped in plan view. Alternatively, as shown in FIG. 4A, the contour shape 3b may be formed to have a curved shape in a plan view. Further, as shown in FIG. 4B, the contour shape 3b may be formed so as to have a V-shape inclined to one side in a plan view.

  The cut generation blade 4 is a blade portion for forming one end of a slit by cutting off one end of a swarf piece generated when the slitting is performed by the cutting blade 1 from a sheet material such as a corrugated cardboard sheet. As shown in FIGS. 1 and 5 (a) to 5 (d), the cut generation blade 4 has a flat mounting portion 41 detachably mounted on one end side of the blade main body 2, and one end of the mounting portion 41. And a cutting edge portion 42 formed in the portion. The cutting edge 42 is configured as a flat blade. The thickness of the attachment portion 41 is set, for example, in a range of 3 mm to 15 mm. Here, FIG. 5A is a plan view when the cut generation blade 4 is viewed from above, and FIG. 5B is a view when viewed from the arrow B direction shown in FIG. FIG. FIG. 5C is a side view when viewed from the direction of arrow C shown in FIG. 5A, and FIG. 5D is a direction of arrow D as shown in FIG. FIG. As shown in FIG. 1, the cut generation blade 4 is fixed to one end side of the blade main body 2 so that a blade edge portion 42 protrudes radially outward from the outer peripheral surface of the blade main body 2. It is preferable that the width of the cut generation blade 4 is configured to be substantially the same as the thickness of the blade main body 2. Further, the mounting portion 41 is configured to be elongated in a direction along the radial direction of the blade main body 2, and includes a through hole 43 formed corresponding to the bolt hole 21 formed in the blade main body 2. ing. In the present embodiment, the configuration of the mounting portion is configured to be rectangular in plan view. The cut generation blade 4 is fixed to a predetermined position of the blade main body 2 by tightening the bolt 50 and pressing the mounting portion 41 against the blade main body 2 with the bolt head. A portion around the through hole 43 is a portion that comes into contact with the bolt head of the bolt 50.

  In the notch generation blade 4 in FIG. 5, the through hole 43 is formed in a long hole shape along the radial direction of the blade main body 2, and the mounting portion 41 (the notch generation blade 4) has The position of the main body 2 can be adjusted in the radial direction. That is, the longitudinal dimension of the elongated through hole 43 is longer than the distance between the two bolt holes 21 formed in the blade body 2 (the distance between the bolt holes 21 including the two bolt holes 21). It is configured as follows. The width of the through hole 43 (the width in the vertical direction in FIG. 5A) is set to be slightly larger than the diameter of the shaft of the bolt 50 to be inserted.

  The attachment portion 41 of the notch generation blade 4 has a rough surface formed on one surface on the side in contact with the bolt head of the bolt 50 installed in the bolt hole 21 through the elongated through hole 43. It has a surface. In the present embodiment, the rough surface portion is formed by forming a plurality of minute-width linear grooves 44 on one surface of the mounting portion 41, and each of the linear grooves 44 2 is formed to extend in a direction perpendicular to the radial direction. Further, it is preferable that each linear groove 44 is formed so as to be arranged at equal intervals along the radial direction of the blade main body 2.

  The groove width (width in the radial direction of the blade body 2) of each linear groove 44 constituting the rough surface portion and the dimension of the groove depth can be appropriately set. For example, the groove width is set to 0.2 mm. About 2 mm and a groove depth of about 0.2 mm to 2 mm. Further, the interval between the linear grooves 44 can be set as appropriate, but is preferably, for example, about 0.5 mm to 2 mm. Such a linear groove 44 can be formed, for example, by performing laser processing, etching processing, cutting processing, or the like on one surface of the mounting portion.

  Further, the area where the linear groove 44 forming the rough surface portion is formed is set so as to include at least the region where the elongated through hole 43 is formed. More preferably, as shown in FIG. 5A, the formation area of the plurality of linear grooves 44 is set so as to cover substantially the entire area of one surface of the mounting portion 41.

  The cutting blade 1 having the above configuration is used by being attached to a groove cutting device 70 as shown in FIGS. 14 and 15, for example. The method of forming a slit in a sheet material such as a corrugated cardboard sheet is the same as the method described in the above background art, and a detailed description is omitted here.

  In the processing blade 1 for cutting according to the present embodiment, since the roughened surface portion is formed on one surface (the surface on the side in contact with the bolt head) of the attachment portion 41 provided in the cut generation blade 4, the cut generation blade 4 is formed. However, even if a force such as to move the incision generating blade 4 radially inward of the blade main body 2 is exerted by an impact at the time of abutting or piercing with the corrugated cardboard sheet, the blade main body is cut through the incision generating blade 4. 2 can prevent the bolt head of the bolt 50 narrowed on one surface of the mounting portion 41, and effectively restricts the movement of the notch generation blade 4 to the radial inside of the blade body 2. can do. As a result, it is possible to suitably maintain an appropriate position of the blade edge portion 42 at the tip of the cut generation blade 4 (the amount of protrusion from the outer peripheral edge of the blade main body 2).

  In particular, in the cutting blade 1 according to the above-described embodiment, since the rough surface portion is constituted by the plurality of linear grooves 44 extending in a direction perpendicular to the radial direction of the blade main body 2, the cutting edge 1 is provided with a corrugated board. Even if a force that moves the cutting generation blade 4 radially inward of the blade main body 2 acts due to the impact at the time of contact / piercing, the blade is narrowed down to the blade main body 2 via the cutting generation blade 4. The edge of the bolt head of the bolt 50 is caught by the linear groove 44 formed in the mounting portion 41, and the movement of the notch generation blade 4 to the radial inside of the blade main body 2 is more effectively restricted. As a result, it is possible to suitably maintain an appropriate position of the blade edge portion 42 at the tip of the cut generation blade 4 (the amount of protrusion from the outer peripheral edge of the blade main body 2).

  Further, in the processing blade 1 for cutting according to the present embodiment, if the notch generation blade 4 is moved radially inward of the blade main body 2 due to an impact at the time of abutting / piercing with the corrugated cardboard sheet, It is also possible to easily grasp that the cut generation blade 4 has moved. To be more specific, for example, as shown in FIG. 6A, the bolt head 50a when the cutting edge 42 at the tip of the cut generation blade 4 is set at an appropriate position (on the radially inner side of the blade body 2). By grasping the number of linear grooves 44 existing between the bolt head of the bolt 50 to be fastened) and the other end 41b of the mounting part 41 (end of the mounting part 41 radially inside the blade body 2). By doing so, when the number increases (in the state shown in FIG. 6B), it can be recognized that the cut generation blade 4 has moved radially inward of the blade main body 2. In particular, when the intervals between the linear grooves 44 are configured to be the same, it is possible to use each linear groove 44 as a scale, and it is possible to accurately grasp the moving amount of the cut generation blade 4. Become. Thus, the operator who performs the slitting operation on the corrugated cardboard sheet or the like using the cutting blade 1 can check the cutting edge 42 at the tip of the notch generation blade 4 at an appropriate position before or after the inspection. It is possible to easily determine whether or not there is, and as a result, it is possible to form a slit end portion, or even if it can be formed, it is possible to prevent the slit end portion from being broken. Can be prevented.

  In addition, when the operator performing the slit processing confirms the positional deviation of the cut generation blade 4 at the time of inspection before or after the work, or when replacing the cut generation blade 4, for example, the bolt head 50a Based on the number of linear grooves existing between the cutting edge 4 and the other end 41 b of the mounting portion 41, the cutting edge 42 of the cutting generation blade 4 extends along the radial direction of the blade main body 2 so as to be at an appropriate position. The notch generation blade 4 can be moved and installed, and it is possible to easily set the notch generation blade 4 to an appropriate position.

  As described above, when the rough surface portion is configured as the plurality of linear grooves 41, in addition to the effect that the positional deviation of the notch generation blade 4 can be effectively prevented, the notch generation blade 4 is temporarily moved. Even in the case of an accident, the moving state and the moving amount can be grasped, and the excellent effect of facilitating the setting operation of the cut generation blade 4 to an appropriate position can be achieved.

  Although the cutting blade 1 according to an embodiment of the present invention has been described above, the specific configuration of the cutting blade 1 is not limited to the above embodiment. In the above-described embodiment, the rough surface portion is formed by forming a plurality of minute width linear grooves 44 on one surface of the mounting portion 41. The roughened surface portion may be formed by performing knurling for forming jagged irregularities in a lattice shape. Alternatively, a rough surface portion may be formed by performing a blast process on a predetermined region to make the surface rougher than other regions. The rough surface portion is formed by performing blast processing on a predetermined region on one surface of the mounting portion 41 to make the surface rougher than the other region, and then forming the plurality of minute width linear grooves 44 described above. It may be constituted by the following.

  Further, as shown in FIG. 7, in the above embodiment, a marking portion indicating a position corresponding to one end of each of the linear grooves 44 is provided on a side surface portion 46 along the radial direction of the blade main body 2 included in the mounting portion 41. It may be configured as follows. This marking portion is preferably formed by forming a plurality of linear grooves 47 in the side surface portion 46 of the mounting portion 41. In particular, one end of each linear groove 44 formed on one surface of the mounting portion 41 reaches a side edge which is a boundary with the side surface portion 46, and each linear groove 47 forming the marking portion is attached to the mounting portion 41 by the mounting portion. It is preferable to connect to one end of each linear groove 44 (linear groove relating to the rough surface portion) formed on one surface of the first surface 41. Here, the mounting portion 41 has two side portions along the radial direction of the blade main body 2, but the marking portion may be formed on one of the two side portions, or It may be formed on both of the two side portions.

  When the cutting blade 1 is set on the upper rotary holders 73 of the grooving device 70, an operator performing slit processing of a corrugated cardboard sheet or the like requires a plurality of linear grooves 44 ( In some cases, it is difficult to visually recognize the linear groove on the rough surface portion). However, by forming such a marking portion on the side surface portion 46 of the mounting portion 41, a cut is generated based on the marking portion. It is possible to check whether or not the position of the blade 4 has shifted. More specifically, as shown in FIG. 8A, the bolt head 50a (fastened radially inside the blade body 2) when the cutting edge 42 at the tip of the cut generation blade 4 is set to an appropriate position. The number of the linear grooves 47 related to the marking portion existing between the bolt head of the bolt 50) and the other end portion 46b of the side surface portion 46 (the end of the side surface portion 46 inside the blade body 2 in the radial direction). By grasping it, it is possible to recognize that the cut generation blade 4 has moved radially inward of the blade main body 2 when the number of the blades has increased (FIG. 8B). In particular, while the intervals between the linear grooves 44 related to the rough surface portion are configured to be the same intervals, the linear grooves 47 related to the marking portion are side edge portions so as to correspond to the positions of the linear grooves 44 related to the rough surface portion. In the case of forming at 46, each linear groove 47 relating to the marking can be used as a scale, and the movement amount of the cut generation blade 4 can be accurately grasped. Thereby, the operator who performs the slitting operation on the corrugated cardboard sheet or the like using the cutting blade 1 can perform the inspection before or after the operation based on the marking portion formed on the side surface portion 46 of the mounting portion 41. It is possible to easily determine whether or not the cutting edge 42 at the tip of the cut generation blade 4 is at an appropriate position, and as a result, the slit end cannot be formed, or even if the slit end can be formed, the slit end can be formed. It is possible to effectively prevent a situation in which a break occurs in the vehicle.

  In addition, when the operator performing the slit processing confirms the positional deviation of the cut generation blade 4 at the time of inspection before or after the work, or when replacing the cut generation blade 4, for example, the bolt head 50a Based on the number of the linear grooves 47 related to the marking part existing between the cutting body 4 and the other end part 46b of the side surface part 46, the blade main body 2 is adjusted so that the cutting edge part 42 of the cutting generation blade 4 is at an appropriate position. The cutting generation blade 4 can be moved / installed along the radial direction of, and the setting of the cutting generation blade 4 to an appropriate position can be easily performed.

  Further, in the above embodiment, the cutting edge 4 of the cut generation blade 4 is configured as a flat blade. However, for example, as illustrated in FIG. 9A and 9B, a semicircular cutting edge may be formed at the outer peripheral edge of one end. The cut generation blade 4 is attached to one end of the blade main body 2 in a direction in which the outer peripheral curved surface of the blade tip 42 is exposed to one end of the blade main body 2.

  Further, in the above-described embodiment, the notch generation blade 4 is formed in a flat plate shape, and is configured so as to include the blade edge portion 42 as a flat blade at one end thereof, but as shown in FIG. Alternatively, one or a plurality of notch portions 421 may be formed in the cutting edge portion 42. In addition, even when the notch generating blade is configured as a semi-cylindrical form as shown in FIG. 9 and a semicircular cutting edge is formed on one end outer peripheral edge, the cutting edge (tip of the cutting edge portion 42) 10), one or a plurality of blade notches 421 may be formed as shown in FIG.

  In the above-described embodiment, the cutting edge 42 of the cutting blade 4 is fixed to the blade main body 2 by two bolts 50 while the cutting edge 42 of the cutting blade 4 can be adjusted in the radial direction of the blade main body 2. However, the present invention is not particularly limited to such a configuration, and a configuration in which the cut generation blade 4 is fixed to the blade main body 2 by a single bolt 50 so that the position thereof can be adjusted in the radial direction of the blade main body 2. May be adopted.

  In the above embodiment, as a form of the blade main body 2, for example, as shown in FIG. 11, a main body cutout portion formed by cutting one end side of the blade main body 2 into a substantially triangular shape in a plan view is formed. Alternatively, the blade body 2 may be configured to include a support surface 27 having an inclination of an angle θ with respect to the end surface 25. Is preferably in the range of 5 ° to 30 °, particularly preferably in the range of 10 ° to 20 °, and is set to 15 ° in the present embodiment. In addition, the bolt hole 21 used when fixing the cut generation blade 4 is formed on the support surface 27, and the cut generation blade 4 is attached to the support surface 27.

DESCRIPTION OF SYMBOLS 1 Cutting blade 2 Cutting tool main body 21 Bolt hole 3 Groove cutting blade 4 Cut generation blade 41 Attachment part 42 Blade tip 43 Through hole 44 Linear groove (linear groove related to rough surface part)
45 recess 46 side surface 47 of mounting part linear groove (linear groove related to marking part)
50 bolt 50a bolt head 70 groove cutting device

Claims (9)

A cutting blade for forming a slit in the sheet material,
Comprising a cutting tool body, a groove cutting blades to form a slit, and a switching write generation blade forming an end of the slit,
The blade body is formed in a fan shape, and has a bolt hole on one end side,
The groove cutting blade is provided along each side edge in the thickness direction of the blade body,
The notch generation blade includes a mounting portion detachably attached to one end of the blade main body, and a cutting edge formed at one end of the mounting portion,
The attachment portion is formed corresponding to a bolt hole of the blade main body, and has a long hole-shaped through hole along a radial direction of the blade main body, and a bolt installed in the bolt hole via the through hole. A roughened surface formed on one side of the bolt head and the side in contact with the bolt head ,
The rough surface portion is configured by forming a plurality of linear grooves on the one surface of the mounting portion, and each linear groove extends in a direction perpendicular to a radial direction of the blade main body. Is formed,
The cutting process, wherein the attachment portion includes a side surface portion along the radial direction of the blade main body, and the side surface portion includes a marking portion indicating a position corresponding to one end of each of the linear grooves. Knife. The cutting tool according to claim 1, wherein the linear grooves are arranged at equal intervals along a radial direction of the blade body . The cutting tool according to claim 1, wherein the marking portion is configured by forming a plurality of linear grooves in the side surface portion of the mounting portion . One end of each linear groove formed on the one surface of the mounting portion reaches a side edge which is a boundary with the side surface portion,
4. The cutting blade according to claim 3 , wherein each linear groove forming the marking portion is connected to one end of each linear groove formed on the one surface of the mounting portion . 5. The cutting blade according to any one of claims 1 to 4, wherein the cutting edge of the cut generation blade is a flat blade. The cutting blade according to any one of claims 1 to 4, wherein the cut generation blade includes the semi-cylindrical cutting edge . The notching blade is cutting machining tool according to any one of claims 1 to 6, characterized in that it has a cutting edge notch at the tip of the cutting edge. The width of the notching blade is cutting machining tool according to any of claims 1 to 7, characterized in that substantially the same dimension as the thickness of the cutting tool body. The cutting tool according to any one of claims 1 to 8, wherein the cutting edge is arranged radially outward of an outer peripheral edge of the tool main body to hold the cut generation blade .

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