JP6681560B1 - Cutting blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting generation blade capable of effectively preventing positional deviation from a blade body. A cutting generation blade (4) attached to one end side of a fan-shaped blade body included in a cutting blade for forming a slit in a sheet material and forming an end portion of the slit, the one end of the blade body. Formed on one side of the side that abuts the bolt head of the bolt installed in the bolt hole, and a through hole 43 in the shape of an elongated hole that is formed corresponding to the bolt hole provided on the side of the tool body. The rough surface portion is formed by forming a plurality of linear grooves 44 on one surface of the mounting portion 41, and each linear groove 44 is formed in the radial direction of the cutter body. Is formed so as to extend in a vertical direction, and the attachment portion 41 includes a side surface portion 46 along the radial direction of the blade body, and the side surface portion 46 indicates a position corresponding to one end of each linear groove 44. Having a marking part (linear groove 47) Notching blade 4 to symptoms. [Selection diagram] Fig. 7

Description

  The present invention relates to a cut generation blade. In particular, the present invention relates to a cutting generation blade that is attached to a blade body of a cutting blade for forming a slit in a sheet material such as a cardboard sheet and forms a slit end.

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

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

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

  The cutting tool 60 is attached to a groove cutting 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. The two cutting tools 60 described above are attached to the grooving device 70. The configuration of the grooving device 70 will be described below with the respective cutting tools being cutting cutting tools 60a and 60b.

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

  Two pieces of cutting blades 60a and 60b are respectively sandwiched by a pair of upper rotary holders 73 and 73 by fasteners (not shown) such as bolts. The cutting blades 60a, 60b are spaced at a predetermined interval along the outer circumference of the pair of rotary holders 73, 73, and the respective cut generating blades 62a, 62b are opposed to each other along the outer circumferential direction. It is attached. On the other hand, two receiving blades 75, 75 are attached to the respective facing surfaces of the pair of lower rotation holders 74, 74 at predetermined intervals corresponding to the thickness dimension of the cutting tools 60a and 60b. To be

  Next, a method of forming slits in the corrugated board sheet 100 using the groove cutting device 70 having the above configuration will be described. As shown in FIG. 14, with the upper rotary holders 73, 73 and the lower rotary holders 74, 74 rotated, the corrugated board sheet 100 of FIG. 14 is moved along the sheet feeding line L of the groove cutting device 70. The sheet is fed to the groove cutting device 70 from the right side. As a result, the cutting tool 60a is sandwiched in the gap between the receiving blades 75, 75 to cut the corrugated board sheet 100, and the front slit 101 having the end portion 103 as the end point as shown in FIG. 12 is formed. Similarly, the other cutting blade 60b is sandwiched between the receiving blades 75, 75 to cut the corrugated board sheet 100, and the rear slit 102 starting from the starting end portion 104 is formed.

  Here, when a corrugated board sheet is cut using a cutting tool as shown in FIG. 13, the cut generation blade 62 forming the slit end portions (the terminal end portion 103 and the starting end portion 104) forms the slit side edge. Problem that the cutting tool 60 has to be replaced due to the wear of the cutting generation blade 62 even though it is worn faster than the groove cutting blade and the groove cutting blade 63 is still usable. was there.

  In order to deal with such a problem, there is known a cutting tool for cutting in which the cutting generation blade 62 is configured to be detachable from the tool body 61. Specifically, Patent Document 1 below discloses one in which a notch generation 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 a cut generating blade attached to a blade body, which is configured so that the amount of protrusion of the blade tip portion from the blade body can be adjusted.

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

  The cutting blades disclosed in Patent Document 1 and Patent Document 2 described above have an excellent effect that only the cutting generation blades that are severely worn are replaceable, but the cutting generation blades There is a problem that the position of the cutting generation blade may be displaced due to the impact when it is inserted into the corrugated board sheet. To be more specific, the cut generation blade moves inward in the radial direction of the tool body due to the impact when it abuts and breaks the corrugated board sheet, and the proper position of the cutting edge portion at the tip of the cut generation blade There is a problem in that it may not be possible to maintain (the amount of protrusion from the outer peripheral edge of the blade body). As a result, the slit ends cannot be formed, or even if they are formed, the slit ends are torn.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a cutting generation blade that can effectively prevent positional deviation from the blade body.

  The above-mentioned object of the present invention is a cutting generation blade that is attached to one end side of a fan-shaped blade body provided with a cutting blade for forming a slit in a sheet material and forms an end portion of the slit. It is equipped with a mounting portion that is detachably mounted on one end side of the main body, and a blade tip portion formed on one end portion of the mounting portion, and the mounting portion corresponds to a bolt hole provided on one end side of the tool body. And a through hole in the form of a long hole along the radial direction of the cutting tool body, and is formed on one surface of the side that contacts the bolt head of the bolt installed in the bolt hole through the through hole. And a rough surface portion, wherein the rough surface portion is formed by forming a plurality of linear grooves on the one surface of the mounting portion, and each linear groove is arranged in a radial direction of the tool body. Formed to extend in a direction perpendicular to The attachment portion includes a side surface portion along the radial direction of the cutter 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 the cutting edge.

  Further, with respect to the cutting generation blade, it is preferable that the linear grooves are arranged at equal intervals along a radial direction of the blade body.

  Further, it is preferable that the marking portion is formed by forming a plurality of linear grooves on 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 that is a boundary with the side surface portion, and each linear groove that constitutes the marking portion is attached to the mounting portion. It is preferable to connect to one end of each linear groove formed on the one surface of the section.

  Further, the blade tip portion can be configured as a flat blade. It can also be formed in a semi-cylindrical shape.

  Further, the cutting edge portion may have a cutting edge notch portion at the tip thereof.

  Advantageous Effects of Invention According to the present invention, it is possible to provide a cutting generation blade that can effectively prevent positional deviation from the blade body.

It is a top view of a cutting tool for 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 plan view of a cutting generation blade provided in the cutting tool shown in FIG. 1, (b) is a side view when seen from the arrow B direction in (a), (c) (A) is a side view when seen from the arrow C direction in (a), and (d) is a side view when seen from the arrow D direction in (a). It is explanatory drawing for demonstrating the effect of the cutting tool shown in FIG. It is a figure which shows the modification of the cutting generation blade with which the cutting tool shown in FIG. 1 is equipped, (a) is a top view of the cutting generation blade with which the cutting tool is equipped, (b) is ( It is a side view when it sees from the arrow B direction in a), (c) is a side view when seeing from the arrow C direction in (a), (d) shows the arrow in (a). It is a side view when it sees from a visual D direction. It is explanatory drawing for demonstrating the effect of the cutting tool which has the cutting generation blade shown in FIG. It is a figure which shows the modification of the cutting generation blade with which the cutting tool shown in FIG. 1 is equipped, (a) is a top view of the cutting generation blade with which the cutting tool is equipped, (b) is ( It is a side view when it sees from the arrow B direction in a), (c) is a side view when seeing from the arrow C direction in (a), (d) shows the arrow in (a). It is a side view when it sees from a visual D direction. FIG. 9A is a plan view showing a modification of the cut generation blade shown in FIG. 5, and FIG. 9B is a plan view showing a 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 blade for cutting shown in FIG. 1 is equipped. It is a schematic plan view of the corrugated board sheet after the slits are formed. It is a top view of the conventional cutting blade. It is a side view which shows schematic structure of the grooving apparatus to which the cutting blade shown in FIG. 13 was attached. It is a front view which shows schematic structure of the grooving apparatus to which the cutting blade shown in FIG. 13 was attached.

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

  The blade body 2 is made of a metal material such as stainless steel, iron, and 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 body 2 with the bolt 50. The two bolt holes 21 are formed side by side along the radial direction of the blade body 2.

  The groove cutting blade 3 is arranged along the outer peripheral portion of the tool body 2 as in the conventional cutting tool 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, and may be formed in a saw-tooth shape, for example, as shown in the enlarged plan view of the main part of FIG. When the groove cutting blade 3 is formed in a saw-tooth shape, the distance S between the vertices 3a of the saw teeth 3 adjacent to each other is formed to be, for example, 2.0 mm to 4.0 mm. It is preferable to form the maximum height H to be, for example, 2.0 mm to 3.5 mm. Further, 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 each apex 3a of each saw tooth 3 is V-shaped in a plan view. Alternatively, as shown in FIG. 4A, the contour shape 3b may be formed to have a curved shape in plan view. Further, as shown in FIG. 4 (b), the contour shape 3b may be formed in a V shape that is inclined to one side in a plan view.

  The cut generation blade 4 is a blade portion for cutting off one end of a scrap piece produced when slitting is performed by the cutting blade 1 from a sheet material such as a corrugated cardboard sheet to form an end portion of the slit. As shown in FIG. 1 and FIGS. 5A to 5D, the cutting generation blade 4 has a plate-shaped mounting portion 41 that is detachably mounted on one end side of the blade body 2, and one end of the mounting portion 41. And a cutting edge portion 42 formed in the portion. The cutting edge portion 42 is configured as a flat blade. The thickness of the mounting portion 41 is set in the range of 3 mm to 15 mm, for example. Here, FIG. 5A is a plan view of the cut generation blade 4 as viewed from above, and FIG. 5B is a view of the cut generation blade 4 as viewed in the direction of arrow B shown in FIG. 5A. FIG. Further, FIG. 5C is a side view when viewed from the arrow C direction shown in FIG. 5A, and FIG. 5D is the side view D shown in FIG. 5A. It is a side view at the time of seeing. As shown in FIG. 1, the cut generation blade 4 is fixed to one end side of the blade body 2 so that the blade tip portion 42 projects radially outward from the outer peripheral surface of the blade body 2. It is preferable that the width of the cut producing blade 4 be 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 the direction along the radial direction of the blade body 2, and has a through hole 43 formed corresponding to the bolt hole 21 formed in the blade body 2. ing. In the present embodiment, the contour of the mounting portion is configured to have a rectangular shape in plan view. The cut generation blade 4 is fixed to a predetermined position of the tool body 2 by tightening the bolt 50 and pressing the mounting portion 41 to the tool body 2 side with the bolt head. The peripheral portion of the through hole 43 is a portion that contacts the bolt head of the bolt 50.

  In the cut generation blade 4 in FIG. 5, the through hole 43 is formed in the shape of an elongated hole along the radial direction of the blade body 2, and the attachment portion 41 (cut generation blade 4) causes the blade tip portion 42 to move along the blade edge. The position of the main body 2 is adjustable in the radial direction. That is, the longitudinal dimension of the long 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). Is configured. The width dimension of the through hole 43 (vertical width dimension in FIG. 5A) is set to be slightly larger than the diameter of the shaft portion of the bolt 50 to be inserted.

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

  The groove width of each linear groove 44 forming the rough surface portion (width in the radial direction of the blade body 2) and the groove depth can be set as appropriate, but for example, the groove width is 0.2 mm. The groove depth is about 2 mm and the groove depth is about 0.2 mm to 2 mm. Further, the interval between the linear grooves 44 can also be set as appropriate, but it is preferably formed to be, 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 area where the elongated through hole 43 is formed. More preferably, as shown in FIG. 5A, the formation areas of the plurality of linear grooves 44 are set so as to cover substantially the entire area of one surface of the mounting portion 41.

  The cutting tool 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. Since the method of forming the slits in the sheet material such as the corrugated cardboard sheet is the same as the method described in the background art, detailed description thereof is omitted here.

  In the processing blade 1 for cutting according to the present embodiment, since the rough surface portion is formed on one surface (the surface on the side that contacts the bolt head) of the mounting portion 41 included in the cutting generation blade 4, the cutting generation blade 4 Even if a force that moves the cutting generation blade 4 inward in the radial direction of the blade main body 2 due to the impact when the blade comes into contact with or breaks through the corrugated cardboard sheet, the blade main body passes through the cutting generation blade 4. The bolt head of the bolt 50 narrowed down to 2 makes it possible to make it hard to slip on one surface of the mounting portion 41, and effectively restricts the movement of the cutting generation blade 4 to the inside of the blade body 2 in the radial direction. can do. As a result, it is possible to preferably maintain an appropriate position of the cutting edge portion 42 at the tip of the cutting generation blade 4 (the amount of protrusion from the outer peripheral edge of the cutting tool body 2).

  Particularly, in the cutting tool 1 according to the present embodiment described above, since the rough surface portion is constituted by the plurality of linear grooves 44 extending in the direction perpendicular to the radial direction of the tool body 2, Even if a force that moves the cutting generation blade 4 inward in the radial direction of the blade main body 2 acts due to the impact at the time of abutting or piercing, it is squeezed into the blade main body 2 via the cutting generation blade 4. The edge of the bolt head of the bolt 50 is caught in the linear groove 44 formed in the mounting portion 41, and more effectively regulates the movement of the cut generation blade 4 inside the blade body 2 in the radial direction. As a result, it is possible to preferably maintain an appropriate position of the cutting edge portion 42 at the tip of the cutting generation blade 4 (the amount of protrusion from the outer peripheral edge of the cutting tool body 2).

  In the cutting blade 1 for cutting according to the present embodiment, if the cutting generation blade 4 is moved inward in the radial direction of the blade main body 2 due to an impact at the time of abutting / piercing the corrugated cardboard sheet, It is also possible to easily grasp that the cutting generation blade 4 has moved. More specifically, for example, as shown in FIG. 6A, the bolt head 50a (in the radial inner side of the tool body 2 when the cutting edge portion 42 at the tip of the cutting generation blade 4 is set to an appropriate position) By grasping the number of linear grooves 44 existing between the bolt head of the bolt 50 to be fastened) and the other end portion 41b of the mounting portion 41 (the end portion of the mounting portion 41 on the radially inner side of the blade body 2). By setting the number, it is possible to recognize that the cutting generation blade 4 has moved to the inside in the radial direction of the tool body 2 when the number increases (in the state shown in FIG. 6B). In particular, when the intervals of the linear grooves 44 are the same, it is possible to use the linear grooves 44 as a scale, and it is possible to accurately grasp the movement amount of the cut generation blade 4. Become. As a result, an operator who uses the cutting tool 1 to perform slit processing on a corrugated cardboard sheet or the like places the blade tip portion 42 at the tip of the cut generation blade 4 at an appropriate position during inspection before or after the operation. It is possible to easily determine whether or not there is, and as a result, it is not possible to form the slit end portion, or even if it can be formed, a situation in which the slit end portion breaks occurs is effective. Can be prevented.

  In addition, when the operator who performs 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 other end 41b of the mounting portion 41 and the mounting portion 41, along the radial direction of the blade main body 2 so that the cutting edge portion 42 of the cutting generation blade 4 is at an appropriate position. The cutting generation blade 4 can be moved and installed, and the cutting generation blade 4 can be easily set to an appropriate position.

  In this way, when the rough surface portion is configured as the plurality of linear grooves 41, in addition to the effect that the position shift of the cut generation blade 4 can be effectively prevented, the cut generation blade 4 is temporarily moved. Even if it happens, the moving state and the moving amount can be grasped, and the setting work of the incision generation blade 4 at an appropriate position can be facilitated, which is an excellent effect.

  Although the cutting tool 1 according to the embodiment of the present invention has been described above, the specific configuration of the cutting tool 1 is not limited to the above embodiment. In the above-described embodiment, the rough surface portion is formed by forming a plurality of linear grooves 44 having a minute width on one surface of the mounting portion 41. The rough surface portion may be formed by performing knurling for forming a grid-like jagged unevenness. Alternatively, the rough surface portion may be formed by subjecting a predetermined area to a blast treatment to make the surface rougher than other areas. Further, the rough surface portion has a roughened surface than other areas by subjecting a predetermined area on one surface of the mounting portion 41 to a blast treatment, and then forms the plurality of linear grooves 44 having a minute width. You may comprise by.

  Further, as shown in FIG. 7, in the above-described embodiment, the side surface portion 46 of the mounting portion 41 along the radial direction of the tool body 2 is provided with a marking portion indicating a position corresponding to one end of each linear groove 44. It may be configured as follows. It is preferable that the marking portion is formed by forming a plurality of linear grooves 47 on 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 the side edge that is the boundary with the side surface portion 46, and each linear groove 47 that constitutes the marking portion is attached to the mounting portion. It is preferable to connect to one end of each linear groove 44 (the linear groove related to the rough surface portion) formed on the one surface of 41. Here, the mounting portion 41 is provided with two side surface portions along the radial direction of the blade main body 2, but the marking portion may be formed on either one of the two side surface portions, or It may be formed on both of the two side surfaces.

  When the cutting tool 1 is installed in the upper rotary holders 73, 73 of the grooving device 70, an operator who performs slitting of the corrugated cardboard sheet or the like has a plurality of linear grooves 44 ( Although it may occur that it is difficult to visually recognize (the linear groove related to the rough surface portion), 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 confirm whether the positional deviation of the blade 4 has occurred. More specifically, as shown in FIG. 8A, the bolt head 50a (fastened at the inner side in the radial direction of the tool body 2 when the cutting edge portion 42 at the tip of the cutting generation blade 4 is set at an appropriate position). The bolt head of the bolt 50) and the other end portion 46b of the side surface portion 46 (the end portion of the side surface portion 46 that is the radially inner side of the main body 2), By grasping it, when the number increases (FIG. 8B), it is possible to recognize that the cutting generation blade 4 has moved radially inward of the tool body 2. In particular, the linear grooves 47 relating to the marking portion are formed at the side edge portions so as to correspond to the positions of the linear grooves 44 relating to the rough surface portions, respectively, while configuring the intervals of the linear grooves 44 relating to the rough surface portion to be the same. In the case of forming 46, it is possible to use each linear groove 47 related to marking as a scale, and it is possible to accurately grasp the movement amount of the cut generation blade 4. Thereby, an operator who performs slit processing on a corrugated cardboard sheet or the like using the cutting tool 1 is based on the marking portion formed on the side surface portion 46 of the mounting portion 41 during inspection before or after the operation. It is possible to easily determine whether or not the cutting edge portion 42 at the tip of the cutting generation blade 4 is in an appropriate position, and as a result, the slit end portion cannot be formed, or even if it can be formed, the slit end portion. It is possible to effectively prevent the occurrence of a situation where a break occurs in the device.

  In addition, when the operator who performs 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. And the other end 46b of the side surface portion 46, based on the number of linear grooves 47 related to the marking portion, so that the blade tip portion 42 of the cut generation blade 4 is at an appropriate position, the blade body 2 It is possible to move and install the cutting generation blade 4 along the radial direction, and it is possible to easily set the cutting generation blade 4 at an appropriate position.

  Further, in the above-described embodiment, the cutting edge portion 4 of the incision generation blade 4 is configured as a flat blade, but, for example, as shown in FIG. A semicircular cutting edge may be formed at the outer peripheral edge of one end by notching one end as shown by the broken lines in FIGS. 9A and 9B. The cut generation blade 4 is attached to one end side of the tool body 2 in such a direction as to expose the outer peripheral curved surface of the cutting edge portion 42 to one end side of the tool body 2.

  In addition, in the above-described embodiment, the cut generating blade 4 is formed in a flat plate shape, and the blade tip portion 42 as a flat blade is provided at one end thereof, but as shown in FIG. It is also possible to form one or a plurality of cutting edges 421 on the cutting edge portion 42. Further, even when the cutting generation blade is configured as a semi-cylindrical shape as shown in FIG. 9 and a semicircular cutting edge is formed on the outer peripheral edge at one end thereof, the cutting edge (the tip of the cutting edge portion 42) is formed. ), One or a plurality of cutting edges 421 may be formed as shown in FIG.

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

  In addition, in the above-described embodiment, the blade body 2 is configured to have a fan shape, but for example, as shown in FIG. 11, one end side of the blade body 2 is cut into a substantially triangular shape in a plan view. It is also possible to configure a notched main body notch portion and provide a support surface 27 having an inclination of an angle θ with respect to the end surface 25 of the blade main body 2. The angle θ is preferably in the range of 5 ° to 30 °, particularly preferably in the range of 10 ° to 20 °, and is set to 15 ° in this embodiment. The bolt holes 21 used when fixing the cut generation blade 4 are 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 Blade main body 21 Bolt hole 3 Groove cutting blade 4 Cutting generation blade 41 Mounting portion 42 Blade edge portion 43 Through hole 44 Linear groove (Linear groove related to rough surface)
45 recess 46 side surface part 47 of mounting part linear groove (linear groove related to marking part)
50 bolt 50a bolt head 70 groove cutting device

Claims (7)

A cutting generation blade that is attached to one end side of a fan-shaped blade body provided with a cutting blade for forming a slit in a sheet material and forms an end portion of the slit,
A mounting portion detachably mounted on one end side of the blade body, and a blade tip portion formed on one end portion of the mounting portion,
The mounting portion is formed corresponding to a bolt hole provided on one end side of the blade main body, and is installed in the bolt hole through the through hole having a long hole along the radial direction of the blade main body and the through hole. And a rough surface portion formed on one surface on the side in contact with the bolt head of the bolt,
The rough surface portion is formed 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 the radial direction of the cutter body. Has been formed,
The mounting portion includes a side surface portion along a radial direction of the blade body, and the side surface portion includes a marking portion indicating a position corresponding to one end of each of the linear grooves. Generation blade.   The cut generating blade according to claim 1, wherein the linear grooves are arranged at equal intervals along a radial direction of the tool body.   The cutting generation blade according to claim 1, wherein the marking portion is configured by forming a plurality of linear grooves on 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 that is a boundary with the side surface portion,
The cut generation blade according to claim 3, wherein each linear groove that constitutes the marking portion is connected to one end of each linear groove formed on the one surface of the mounting portion.   The cutting generation blade according to claim 1, wherein the blade tip portion is a flat blade.   The cutting edge blade according to claim 1, wherein the blade tip portion is formed in a semi-cylindrical shape. The cutting edge blade according to any one of claims 1 to 6, wherein the cutting edge portion has a cutting edge notch portion at a tip thereof.

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