JP6779462B1 - Notch generation blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting generation blade for a cutting blade capable of being set at an appropriate position with respect to a blade main body and preventing breakage. SOLUTION: The cutting generating blade is attached to one end side of a fan-shaped blade body provided in a cutting blade for forming a slit in a sheet material and forms an end portion of the slit, and is a cutting generation blade of the blade body. A mounting portion that can be detachably attached to one end side and a cutting edge portion formed at one end of the mounting portion are provided, and the mounting portion corresponds to a bolt hole provided on one end side of the blade body. It is provided with a long hole-shaped through hole formed along the radial direction of the blade body and a mounting portion engaging groove portion formed on one surface of the blade body facing the one end side. The mounting portion engaging groove portion is a notch generation blade characterized in that the blade body engages with a blade body engaging protrusion provided on a contact surface with the mounting portion on one end side thereof. [Selection diagram] FIG. 8

Description

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

As a packaging box for storing or moving an object, a corrugated cardboard box manufactured by assembling a corrugated cardboard sheet 100 as shown in FIG. 26 is known. The top lid and 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 portions so as to overlap each other.

A grooving device is generally used for forming the slits 101 and 102, and a cutting tool 60 as shown in FIG. 27 is often used for this grooving device.

In the cutting blade 60, a cutting generation blade 62 and a grooving blade 63 are integrally formed on a fan-shaped blade main body 61. The notch generation blade 62 protrudes radially outward from one end of the outer peripheral surface of the blade body 61 so as to be flush with the end surface of the blade body 61, and has corners 64 on both sides in the width direction of the end surface. There is. Grooving 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 grooving device 70 as shown in FIGS. 28 and 29. FIG. 28 is a side view showing a schematic configuration of the grooving device, and FIG. 29 is a front view. Two of the above-mentioned cutting blades 60 are attached to the grooving device 70, and the configuration of the grooving device 70 will be described below with the respective blades as cutting blades 60a and 60b.

The grooving device 70 includes an upper rotating shaft 71 and a lower rotating shaft 72. The upper rotating shaft 71 and the lower rotating 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 rotating holders 73 and 73 and a pair of lower sides, respectively. It includes rotating holders 74 and 74.

Two cutting blades 60a and 60b are sandwiched between the pair of upper rotary holders 73 and 73 by fasteners (not shown) such as bolts, respectively. The cutting blades 60a and 60b are spaced apart from each other along the outer circumference of the pair of rotary holders 73 and 73 so that the cut generation blades 62a and 62b face each other along the outer circumference. It is attached. On the other hand, two receiving blades 75, 75 are attached to the facing surfaces of the pair of lower rotary holders 74, 74 at predetermined intervals corresponding to the thickness dimensions of the cutting blades 60a and 60b. Be done.

Next, a method of forming a slit in the corrugated cardboard sheet 100 by using the grooving device 70 having the above configuration will be described. As shown in FIG. 28, in a state where the upper rotating holders 73, 73 and the lower rotating holders 74, 74 are rotated, the corrugated cardboard sheet 100 is placed along the sheet feeding line L of the grooving device 70 in FIG. 28. It is fed to the grooving device 70 from the right side. As a result, the cutting blade 60a is sandwiched between the receiving blades 75 and 75, the corrugated cardboard sheet 100 is cut, and the front slit 101 having the end end 103 as shown in FIG. 27 is formed. Similarly, the other cutting blade 60b is sandwiched between the receiving blades 75 and 75, the corrugated cardboard sheet 100 is cut, and the rear slit 102 starting from the starting end portion 104 is formed.

Here, when the corrugated cardboard sheet is cut using the cutting blade as shown in FIG. 28, the cut generation blade 62 forming the slit end portion (end end portion 103, start end portion 104) forms the slit side edge. The problem is that the cutting blade 60 must be replaced due to the wear of the cutting generation blade 62 even though the grooving blade 63 is still usable because it wears faster than the grooving blade. was there.

In order to deal with such a problem, a cutting blade having a structure in which the cutting generation blade 62 is detachable from the blade main body 61 is known. Specifically, Patent Document 1 below discloses a blade 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 notch generation blade attached to a blade body, which is configured so that the amount of protrusion of the cutting edge portion from the blade body can be adjusted.

Real Fairness 06-001356 Gazette Japanese Unexamined Patent Publication No. 2005-186261

The cutting blades disclosed in Patent Documents 1 and 2 have an excellent effect that only the cutting generation blades with severe wear conditions are replaceable, but the blades have an excellent effect on the blade body. When setting the cutting generation blade, it is necessary to accurately match the longitudinal direction of the cutting generation blade with the radial direction of the blade body and fix the cutting generation blade to one end side of the blade body. Assuming that, as shown in FIG. 30, the longitudinal direction of the cutting generation blade and the radial direction of the blade body do not match, and the cutting is performed in a state where the longitudinal direction of the cutting generation blade is tilted with respect to the radial direction of the blade body. If the generating blade is set on the blade body, the tip of the cutting generating blade collides with one of the two receiving blades 75, 75 attached to the opposite surfaces of the lower rotary holders 74, 74. There was a problem that the notch generation blade was broken.

Such a problem occurs even when the cut generation blade is appropriately set on the blade body in a state where the longitudinal direction of the cut generation blade is aligned with the radial direction of the blade body, but the cut generation blade is corrugated cardboard. It may be triggered by the impact of being inserted into the seat. Specifically, the cut-generating blade is fixed to one end side of the blade body via a fastener such as a bolt, but when the cut-generating blade is inserted into the corrugated cardboard sheet, the diameter of the blade body is caused by an impact. The cut generation blade rotates slightly in a direction in which the longitudinal direction of the cut generation blade deviates from the direction, and the tip of the cut generation blade collides with the receiving blade 75, causing the cut generation blade to break. ..

The present invention has been made to solve such a problem, and to provide a cutting generation blade for cutting blades which can be set at an appropriate position with respect to the blade body and can prevent breakage. The purpose.

The object of the present invention is a notch generating blade which is attached to one end side of a fan-shaped blade main body provided in a cutting blade for forming a slit in a sheet material and forms an end portion of the slit. A mounting portion that can be detachably attached to one end side of the blade body and a cutting edge portion formed at one end of the mounting portion are provided, and the mounting portion is provided in a bolt hole provided on one end side of the blade body. It is provided with a correspondingly formed elongated through hole along the radial direction of the blade body and a mounting portion engaging groove portion formed on one surface of the blade body facing the one end side. The mounting portion engaging groove is achieved by a notch generating blade characterized in that the blade body engages with a blade body engaging protrusion on a contact surface with the mounting portion on one end side thereof. Will be done.

Further, regarding the notch generation blade, it is preferable that the mounting portion engaging groove portion is configured to extend in the radial direction of the blade body.

Further, in a state where the blade main body engaging protrusion is engaged with the mounting portion engaging groove portion, the cut generation blade is installed at one end side of the blade main body in a direction along the radial direction of the blade main body. It is preferable that the configuration is changeable.

Further, the mounting portion is provided with a plurality of mounting portion engaging grooves, and each mounting portion engaging groove is formed so as to extend in a direction perpendicular to the radial direction of the blade body. preferable.

Further, it is preferable that the engaging groove portions of the mounting portions are arranged at the same interval along the radial direction of the blade body.

Further, the object of the present invention is a cutting generation blade that is attached to one end side of a fan-shaped blade body provided in a cutting blade for forming a slit in a sheet material and forms an end portion of the slit. A mounting portion that is detachably attached to one end side of the blade body and a cutting edge portion formed at one end of the mounting portion are provided, and the mounting portion is a bolt provided on one end side of the blade body. An elongated through hole formed corresponding to the hole and along the radial direction of the blade body, and a mounting portion engaging protrusion formed on one surface of the blade body facing the one end side. The mounting portion engaging protrusion is provided with a notch generation characterized in that the blade body engages with a blade body engaging groove portion on a contact surface with the mounting portion on one end side thereof. Achieved by the blade.

Further, regarding the notch generation blade, it is preferable that the mounting portion engaging protrusion is configured to extend in the radial direction of the blade body.

Further, in a state where the mounting portion engaging protrusion is engaged with the blade body engaging groove portion, the cut generation blade is installed at one end side of the blade body in a direction along the radial direction of the blade body. It is preferable that the configuration is changeable.

Further, it is preferable that the mounting portion engaging protrusion is formed so as to extend in a direction perpendicular to the radial direction of the blade body.

Further, the mounting portion engaging protrusion is composed of a linear member accommodated and arranged in a linear groove formed on one surface of the blade body facing the one end side, and the linear shape. It is preferable that the exposed portion of the member is arranged so as to project from one surface of the blade body facing the one end side.

Further, the linear member is preferably formed of a metal material.

Further, the object of the present invention is a cutting generation blade that is attached to one end side of a fan-shaped blade body provided in a cutting blade for forming a slit in a sheet material and forms an end portion of the slit. A mounting portion that is detachably attached to one end side of the blade body and a cutting edge portion formed at one end of the mounting portion are provided, and contact with the one end side of the blade body to which the mounting portion is attached. A blade body engaging notch and a blade body engaging portion are formed on the surface by cutting out a side edge region of the contact surface in the thickness direction of the blade body along the radial direction of the blade body. The mounting portion is formed corresponding to a bolt hole provided on the contact surface on the one end side of the blade body, and has an elongated through hole along the radial direction of the blade body and the one end of the blade body. The mounting portion engaging cutout portion and the mounting portion engaging portion formed on one surface of the side facing the contact surface on the side are provided, and the mounting portion engaging portion and the mounting portion engaging portion are provided. It is formed by cutting out a region corresponding to the blade body engaging portion on one surface of the mounting portion facing the one end side of the blade body, and the mounting portion engaging portion is formed by cutting out the blade body engaging portion. On the protruding surface of the joint notch that abuts on the notched bottom surface of the blade body that is perpendicular to the thickness direction of the blade body, and on the engaging side wall surface of the blade body that faces the notched bottom surface side of the blade body that the blade body engaging portion has. The notch is provided with an engaging side wall surface of the mounting portion to be abutted, and the mounting portion engaging notch portion is provided with a notched bottom surface of the mounting portion which is in contact with the protruding surface of the blade body engaging portion. Achieved by the generated blade.

Further, with respect to the notch generation blade, at least a part of the mounting portion engaging portion is formed in a region closer to the cutting edge portion than the through hole, and the above-mentioned mounting portion is opposed to the one end side of the blade body. With respect to one surface of the mounting portion, the mounting portion engaging side wall surface included in the mounting portion engaging portion is formed so as to face the left side in a plan view in which the blade edge portion is viewed upward. preferable.

Further, in a state where the engaging side wall surface of the mounting portion is in contact with the engaging side wall surface of the blade body, the cut-generating blade is placed on one end side of the blade body in a direction along the radial direction of the blade body. It is preferable that the installation position can be changed.

Further, the cutting edge portion of the cutting generation blade can be configured as a flat blade. Further, the notch generation blade can be configured to include the semi-cylindrical cutting edge portion.

Further, the notch generation blade can be configured to have a cutting edge notch at the tip of the cutting edge.

According to the present invention, it is possible to provide a cutting generation blade for a cutting blade that can be set at an appropriate position with respect to the blade main body and can prevent breakage.

It is a top view of the blade for cutting processing which concerns on one Embodiment of this invention. It is an enlarged view in the cross section AA of FIG. FIG. 3 is an enlarged plan view of a main part showing a modified example of the grooving blade in the cutting blade shown in FIG. 1. FIG. 3 is an enlarged plan view of a main part showing a modified example of the grooving blade in the cutting blade shown in FIG. 1. (A) is a plan view of a cutting generation blade included in the cutting blade shown in FIG. 1, (b) is a cross-sectional view showing a BB cross section in (a), and (c) is a cross-sectional view. It is a back view (bottom view) of the notch generation blade. It is explanatory drawing for demonstrating the deformation example of the cut-out generation blade provided with the cutting-edge blade. It is explanatory drawing for demonstrating the blade body engaging protrusion which the blade body includes. It is explanatory drawing for demonstrating the blade body engaging protrusion which the blade body includes. It is explanatory drawing for demonstrating the deformation example of the blade main body engaging protrusion portion and the mounting portion engaging groove portion. It is explanatory drawing for demonstrating the deformation example of the blade main body engaging protrusion portion and the mounting portion engaging groove portion. It is a figure which shows the modification of the cut-out generation blade provided with the cutting-edge cutting tool shown in FIG. 1, (a) is a plan view of the cutting-edge generation blade provided with cutting-processing blade, (b) is (b). It is a side view when viewed from the arrow D direction in a), (c) is a side view when viewed from the arrow E direction in (a), and (d) is an arrow in (a). It is a side view when viewed from the view F direction. (A) is a plan view showing a modification of the cutting generation blade shown in FIG. 5, and (b) is a plan view showing a modification of the cutting generation blade shown in FIG. It is a top view which shows the modification of the blade body which the cutting blade shown in FIG. 1 has. It is a top view which shows the modification of the blade body which the cutting blade shown in FIG. 1 has. It is a figure which shows the modification of the cut-out generation blade provided with the cutting-edge cutting tool shown in FIG. 1, (a) is the top view of the cutting-edge generation blade provided with cutting-processing blade, (b) is (b). It is a cross-sectional view which shows the HH cross section in a), (c) is the back surface view (bottom view) of the cut generating blade, (d) is the sectional view which shows the I-I cross section in (a). .. 14 is a cross-sectional view showing a modified example of the blade body and the notch generation blade shown in FIGS. 14 and 15, respectively. It is explanatory drawing for demonstrating the deformation example of the cutting blade shown in FIG. It is explanatory drawing for demonstrating the deformation example of the cutting blade shown in FIG. It is a top view which shows the modification of the blade body which the cutting blade shown in FIG. 1 has. It is a figure which shows the modification of the cut-out generation blade provided with the cutting-edge cutting tool shown in FIG. 1, (a) is the top view of the cutting-edge generation blade provided with cutting-processing blade, (b) is (b). It is a cross-sectional view which shows the KK cross section in a), (c) is the back view (bottom view) of the cut generating blade, and (d) is the cross-sectional view which shows the LL cross section in (a). .. 19 is a cross-sectional view showing a modified example of the blade body and the notch generation blade shown in FIGS. 19 and 20, respectively. It is explanatory drawing for demonstrating the deformation example of the cutting blade shown in FIG. It is explanatory drawing for demonstrating the deformation example of the cutting blade shown in FIG. It is a top view which shows the modification of the blade body which the cutting blade shown in FIG. 1 has. It is a figure which shows the modification of the cut-out generation blade provided with the cutting-edge cutting tool shown in FIG. 1, (a) is the top view of the cutting-edge generation blade provided with cutting-processing blade, (b) is (b). It is a cross-sectional view which shows the NN cross section in a), (c) is the back surface view (bottom view) of the cutting generation blade, (d) is the cross-sectional view which shows the OO cross section in (a). .. It is a schematic plan view of the corrugated cardboard sheet after the slit is formed. It is a top view of the conventional cutting tool for cutting. It is a side view which shows the schematic structure of the grooving apparatus to which the cutting edge for cutting process shown in FIG. 27 is attached. It is a front view which shows the schematic structure of the grooving apparatus to which the cutting edge for cutting process shown in FIG. 27 is attached. It is explanatory drawing for demonstrating the problem which a conventional cutting tool for cutting processing has.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Each figure is partially enlarged or reduced to facilitate 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 in a cross section thereof AA. 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, and as shown in FIGS. 1 and 2, the blade body 2 and the grooving blade 1 are used. 3 and a notch generating blade 4 are provided.

The blade body 2 is made of a metal material such as stainless steel, iron, or tool steel, and is formed in a fan shape in a plan view as shown in FIG. The blade body 2 is provided with two bolt holes 21 on one end side (one side surface side of the blade body 2). The bolt hole 21 is a hole for attaching the notch generation blade 4 to the blade body 2 by the 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 body 2 in the same manner as the conventional cutting blade 60 (see FIG. 28). Since the grooving blade 3 in the present embodiment is configured to perform slit processing on the sheet material, it is provided on both side edges of the blade body 2 in the thickness direction as shown in FIG. The specific form of the grooving blade 3 is not particularly limited, and may be formed in a sawtooth shape, for example, as shown in the enlarged plan view of the main part of FIG. When the grooving blade 3 is formed in a sawtooth shape, the distance S between each apex 3a of each saw tooth 3 adjacent to each other is formed to be, for example, 2.0 mm to 4.0 mm, and each saw tooth 3 is formed. It is preferable to form the maximum height H to be, for example, 2.0 mm to 3.5 mm. Further, when the grooving blade 3 is formed in a sawtooth 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 has a V shape in a plan view. As shown in FIG. 4A, the contour shape 3b may be formed so as to be curved 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 an end portion of a slit by cutting off one end of a scrap piece generated when 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 (c), the cut generating blade 4 has a flat plate-shaped mounting portion 41 that is detachably attached to one end side of the blade body 2 and one end of the mounting portion 41. It is provided with 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, for example, in the range of 2 mm to 15 mm. Here, FIG. 5A is a plan view of the cutting generation blade 4 when viewed from above, and FIG. 5B is a cross-sectional view showing a cross section taken along the line BB of FIG. 5A. .. Further, FIG. 5 (c) is a back view (bottom view of the cut generation blade 4) of FIG. 5 (a). As shown in FIG. 1, for example, the cut generation blade 4 is fixed to one end side of the blade body 2 so that the cutting edge portion 42 projects radially outward from the outer peripheral surface of the blade body 2. It is preferable that the width of the notch generation blade 4 is configured to be substantially the same as the thickness of the blade body 2. Further, the mounting portion 41 is configured to be elongated in the radial direction of the blade body 2, and includes 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 a plan view. The notch generation blade 4 is fixed at a predetermined position of the blade body 2 by tightening the bolt 50 and pressing the mounting portion 41 against the blade body 2 side with the bolt head. The portion around the through hole 43 is the 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 body 2, and the mounting portion 41 (cutting generation blade 4) has the cutting edge portion 42 as a blade. 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 becomes 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 dimension of the through hole 43 (the width dimension in the vertical direction in FIG. 5A) is set to be larger than the diameter of the shaft portion of the bolt 50 to be inserted.

Further, the mounting portion 41 included in the cutting generation blade 4 is a linear shape formed on one surface of the blade body 2 facing the one end side (the bottom surface 45 in contact with the end surface of the blade body 2 on the one end side). A mounting portion engaging groove portion 46 is provided. In the present embodiment, the mounting portion engaging groove portion 46 is configured to extend in the radial direction of the blade body 2. The groove width of the mounting portion engaging groove portion 46 (width in the direction along the width direction of the blade body 2 <width in the direction perpendicular to the longitudinal direction of the mounting portion 41>) and the groove depth dimension are appropriately set. However, for example, the groove width is formed to be about 0.2 mm to 2 mm, and the groove depth is formed to be about 0.1 mm to 1 mm. Such a mounting portion engaging groove portion 46 can be formed by, for example, performing laser processing, etching processing, cutting processing, wire cutting processing, or the like on one surface of the mounting portion.

Further, as shown in FIGS. 5 (b) and 5 (c), the mounting portion engaging groove portion 46 is formed in a region between the cutting edge portion 42 of the cut generation blade 4 and the through hole 43. The mounting portion engaging groove portion 46 is formed at the center position in the width direction of the mounting portion 41. Here, the forming area of the mounting portion engaging groove portion 46 is not particularly limited, and for example, as shown in the back view of FIG. 6A, the end portion of the mounting portion 41 on the side opposite to the cutting edge portion 42. , The mounting portion engaging groove portion 46 may be formed in the region between the through hole 43, or as shown in the back surface view of FIG. 6B, the side edge portion of the mounting portion 41 The mounting portion engaging groove portion 46 may be formed in the region between the through hole 43. Further, the number of the mounting portion engaging groove portions 46 is not particularly limited, and as shown in the back view of FIG. 6C, a plurality of mounting portion engaging groove portions 46 may be formed. When a plurality of mounting portion engaging groove portions 46 are formed, it is preferable to form a blade body engaging protrusion 25 (described later) that is engaged (sandwiched) with each mounting portion engaging groove portion 46.

Further, the blade body 2 is formed on a contact surface with a mounting portion 41 arranged on one end side thereof, as shown in FIG. 7A and FIG. 7B which is a cross-sectional view taken along the line CC thereof. It is provided with a linear blade body engaging protrusion 25. In the present embodiment, the blade body engaging protrusion 25 is configured to extend in the radial direction of the blade body 2. The linear blade body engaging protrusion 25 has a function of engaging with the mounting groove portion 46 formed in the mounting portion 41 described above. Further, the width of the blade body engaging protrusion 25 (width in the width direction of the blade body 2) and the height dimension can be appropriately set, and for example, the width is about 0.2 mm to 2 mm. , The height is formed to be about 0.1 mm to 1 mm. Such a blade body engaging protrusion 25 can be formed, for example, by cutting or etching the contact surface 26 with the mounting portion 41 arranged on one end side of the blade body 2. .. Further, for example, a linear groove can be formed by laser processing, etching processing, cutting processing, wire cutting processing, or the like, and the linear member can be accommodated and arranged in the linear groove. The linear member housed in the linear groove is arranged so that the exposed portion protrudes from the contact surface 26 with the mounting portion on one end side of the blade body. Here, the linear member is preferably formed of a metal material such as a metal wire. Further, it is preferable that the linear member is adhesively fixed in the linear groove with a resin or the like.

Further, as shown in FIG. 7A, the blade body engaging protrusion 25 is on the contact surface 26 with the mounting portion 41 arranged on one end side of the blade body, and is radially outside the blade body 2. It is formed in the region between the end edge and the bolt hole 21 (of the two bolt holes 21, the bolt hole 21 arranged on the outer side in the radial direction of the blade body). Here, the blade body engaging protrusion 25 engages with the above-mentioned mounting portion engaging groove portion 46, and can be formed corresponding to the formation position of the mounting portion engaging groove portion 46. Therefore, the forming position of the blade body engaging protrusion 25 is not particularly limited. Further, the number of blade body engaging protrusions 25 can also correspond to the number of mounting groove portions 46.

Here, since the position of the notch generation blade 4 can be adjusted in the direction along the radial direction of the blade body 2 on one end side of the blade body 2, the blade body engaging protrusion 25 engages with the mounting portion. In the state of being engaged with the groove portion 46, the cutting generation blade 4 is configured so that the installation position can be changed in the direction along the radial direction of the blade body 2 on one end side of the blade body 2. That is, the length of the mounting portion engaging groove portion 46 and the length of the blade body engaging protrusion 25 are such that the cutting generation blade 4 is in a state where the blade body engaging protrusion 25 is engaged with the mounting portion engaging groove portion 46. However, it is configured so that it can move on the end surface of the blade body 2 on one end side in the radial direction of the blade body 2. For example, in the present embodiment, as shown in FIGS. 8A and 8B, the cutting edge of the cutting generation blade 4 is configured to be able to protrude from the upper end of the blade body 2 in the range of 0 mm to 5 mm. The difference between the length of the mounting portion engaging groove portion 46 and the length of the blade body engaging protrusion 25 is 5 mm or more. More specifically, the length of the mounting portion engaging groove portion 46 is configured to be 5 mm or more longer than the length of the blade body engaging protrusion 25. In addition, in FIG. 8A, the end portion of the mounting portion engaging groove portion 46 on the blade edge portion 42 side and the end portion of the blade body engaging protrusion 25 on the outer peripheral edge portion side of the blade body 2 are in contact with each other. In this state, the cutting edge of the cutting generation blade 4 is flush with the upper end of the blade body 2 (protrusion amount is 0 mm).

The cutting tool 1 having the above configuration is used by being attached to, for example, a grooving device 70 as shown in FIGS. 28 and 29. Since the method of forming the slit in the sheet material such as the corrugated cardboard sheet is the same as the method described in the above background technique, detailed description thereof will be omitted here.

In the cutting machined blade 1 according to the present embodiment, the blade body 2 includes a linear blade body engaging protrusion 25 formed on a contact surface 26 with a mounting portion 41 on one end side thereof. The mounting portion 41 includes a linear mounting portion engaging groove portion 46 formed on one surface of the side facing one end side of the blade body 2, and the blade body engaging protrusion 25 engages with the mounting portion. It is configured to engage the groove 46. By providing such a configuration, when setting the cut generation blade 4 with respect to the blade body 2, the longitudinal direction of the cut generation blade 4 and the radial direction of the blade body are accurately matched to make a cut. The generation blade 4 can be fixed to one end side of the blade body 2. That is, as in the conventional case, the longitudinal direction of the cutting generation blade 4 and the radial direction of the blade body 2 do not match, and the longitudinal direction of the cutting generation blade 4 is tilted with respect to the radial direction of the blade body 2. The two receiving blades 75, which are attached to the opposite surfaces of the lower rotary holders 74 and 74, effectively prevent the situation where the notch generation blade 4 is set on the blade body 2 from occurring. It is possible to extremely effectively suppress that the tip end portion of the cut generation blade 4 collides with any one of the 75 and the cut generation blade 4 is broken.

Further, since the linear blade body engaging protrusion 25 is engaged with the linear mounting portion engaging groove 46, a cut is generated even if the corrugated cardboard sheet is continuously slit. When the blade 4 is inserted into the corrugated cardboard sheet, it is possible to effectively prevent the blade 4 from rotating slightly in the direction in which the longitudinal direction of the cutting generation blade 4 deviates from the radial direction of the blade body 2 due to an impact. It is possible to extremely effectively prevent the tip portion of the cut generation blade 4 from colliding with 75 and the cut generation blade 4 from being broken.

Although the cutting blade 1 according to the 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 embodiment, the blade body engaging protrusion 25 is configured to extend in the radial direction of the blade body 2, and the mounting portion engaging groove 46 extends in the radial direction of the blade body 2. Although it is configured, for example, as shown in FIG. 9, the blade body engaging protrusion 25 is formed so as to extend in a direction perpendicular to the radial direction of the blade body 2, and the mounting portion 41 is a blade body. A plurality of mounting portion engaging groove portions 46 extending in a direction perpendicular to the radial direction of 2 may be provided. It is preferable that the engaging groove portions 46 of the mounting portions are arranged at the same interval along the radial direction of the blade body 2.

Even with the configuration shown in FIG. 9, since the linear blade main body engaging protrusion 25 is engaged with the linear mounting portion engaging groove 46, the above-mentioned effect, that is, the blade main body When setting the cut generation blade 4 with respect to 2, the longitudinal direction of the cut generation blade 4 and the radial direction of the blade body 2 are accurately matched, and the cut generation blade 4 is placed on one end side of the blade body 2. It can exert the effect of being able to be fixed to.

Since the mounting portion 41 is configured to include a plurality of mounting portion engaging groove portions 46 extending in a direction perpendicular to the radial direction of the blade body 2, as shown in FIGS. 10A and 10B. By changing the engaging position between the mounting portion engaging groove portion 46 and the blade body engaging protrusion 25, the amount of protrusion of the cutting edge of the cutting generation blade 4 from the upper end (outer peripheral edge) of the blade body 2 is stepwise. Can be changed to. In addition, in FIG. 10A, among the plurality of mounting portions engaging groove portions 46, the mounting portion engaging groove portion 46 arranged on the cutting edge portion 42 side most engages with the blade body engaging protrusion 25. In this state, the cutting edge of the cutting generation blade 4 is flush with the upper end of the blade body 2 (protrusion amount is 0 mm).

Further, when the cutting blade 1 is configured by the configuration shown in FIG. 9, the cut generating blade 4 cuts in the radial inside of the blade main body 2 due to the impact when the cutting blade 4 abuts or breaks through the corrugated cardboard sheet. Even if a force that moves the generated blade 4 acts, the cut generating blade 4 causes the blade body 2 to act due to the action of the blade body engaging protrusion 25 and the mounting portion engaging groove 46 that are engaged with each other. It is possible to prevent the blade from moving inward in the radial direction. That is, when the configuration shown in FIG. 9 is adopted, when the cutting generation blade 4 is inserted into the corrugated cardboard sheet, the longitudinal direction of the cutting generation blade 4 slightly deviates from the radial direction of the blade body 2 due to an impact. While effectively preventing rotation, it is also possible to prevent the notch generation blade 4 from moving inward in the radial direction of the blade body 2.

Further, as shown in FIG. 9, even when each mounting portion engaging groove portion 46 is configured so as to extend in a direction perpendicular to the radial direction of the blade body 2, each mounting portion engaging groove portion 46 is formed. The position is not particularly limited, and each mounting portion engaging groove portion may be formed in the region between the cutting edge portion 42 and the through hole 43 of the cutting generation blade 4, and the mounting portion 41 on the opposite side of the cutting edge portion 42 may be formed. Each mounting portion engaging groove portion 46 may be formed in the region between the end portion and the through hole 42. The blade body engaging protrusion 25 configured to extend in a direction perpendicular to the radial direction of the blade body 2 is engaged with the mounting portion engaging groove 46 formed in the notch generation blade 4. Therefore, the forming position thereof corresponds to the forming position of the mounting portion engaging groove portion 46.

Further, in the above embodiment, the cutting edge portion 4 of the cutting generation blade 4 is configured as a flat blade, but for example, as shown in FIG. 11, it is configured as a semi-cylindrical form on the back surface side thereof. A semicircular cutting edge may be formed on the outer peripheral edge of one end by cutting out one end portion as shown by the broken lines in FIGS. 11A and 11B. The cut generation blade 4 is attached to one end side of the blade body 2 in a direction that exposes the outer peripheral curved surface of the blade edge portion 42 to one end side of the blade body 2. Here, FIG. 11A is a plan view of the cutting generation blade 4 when viewed from above, and FIG. 11B is a view of the cutting generation blade 4 when viewed from the arrow D direction shown in FIG. 11A. It is a side view of. 11 (c) is a side view when viewed from the arrow E direction shown in FIG. 11 (a), and FIG. 11 (d) is the arrow F direction shown in FIG. 11 (a). It is a side view when viewed from.

Further, in the above embodiment, the notch generation blade 4 is formed in a flat plate shape, and the cutting edge portion 42 as a flat blade is provided at one end thereof. As shown in FIG. 12A. , One or more blade edge notches 421 may be formed in the blade edge portion 42. Further, even when the cutting generation blade is configured as a semi-cylindrical form as shown in FIG. 11 and a semicircular cutting edge is formed on the outer peripheral edge of one end thereof, the cutting edge (the tip of the cutting edge portion 42) is formed. ), As shown in FIG. 12B, one or more cutting edge notches 421 may be formed.

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

Further, in the above embodiment, the blade body 2 is configured to have a fan-shaped shape. For example, as shown in FIG. 13, one end side of the blade body 2 is cut into a substantially triangular shape in a plan view. The main body notch formed by being cut off may be configured to include a support surface 27 having an inclination of an angle θ with respect to the end face 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 hole 21 used for 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.

Further, in the above embodiment, the blade body engaging protrusion 25 and the mounting portion engaging groove 46 are configured to have a linear shape having a relatively narrow width, but are particularly limited to such a configuration. Instead, for example, as shown in FIG. 14 (a) and FIG. 14 (b) which is a cross-sectional view of the GG, the blade body engaging protrusion 25 is configured to have a wide form having a width dimension of 2 mm or more. Then, as shown in FIGS. 15 (a) to 15 (d), while the mounting portion engaging groove portion 46 is engaged with the blade body engaging protrusion 25, the notch generating blade 4 is one end of the blade body 2. On the side, the installation position may be changed in a direction along the radial direction of the blade body 2. In FIG. 14, a part of both side edges of one end of the blade body 2 is cut out along the radial direction of the blade body 2, and the radial outer end portion of the blade body 2 is cut out to engage the blade body. The collision portion 25 is formed. The width of the blade body engaging protrusion 25 is configured to be the same along the radial direction of the blade body 2. Further, each bolt hole 21 is formed on the end surface of the blade body engaging protrusion 25. Further, in FIG. 15, the mounting portion engaging groove portion 46 formed on one surface of the mounting portion 41 of the cutting generation blade 4 (the bottom surface 45 in contact with the end surface on one end side of the blade body 2) is the cutting edge portion 42. It is formed with a gap between it and the cutting edge of. Here, FIG. 15 (a) is a plan view of the cutting generation blade 4 when viewed from above, and FIG. 15 (b) is a cross-sectional view showing an HH cross section shown in FIG. 15 (a). Is. 15 (c) is a back view of the cutting generation blade 4, and FIG. 15 (d) is a cross-sectional view showing an I-I cross section shown in FIG. 15 (a).

Even in the configuration shown in FIGS. 14 and 15, since the blade body engaging protrusion 25 is engaged with the mounting portion engaging groove 46, the above-mentioned effect, that is, the blade body 2 is When setting the cutting generation blade 4, the longitudinal direction of the cutting generation blade 4 and the radial direction of the blade body 2 are accurately matched, and the cutting generation blade 4 is fixed to one end side of the blade body 2. It is possible to exert the effect of being able to do it.

In the configuration shown in FIGS. 14 and 15, the cross-sectional viewing rectangle is as shown in FIGS. 14 (b) and 15 (d) as the form of the blade body engaging protrusion 25 and the mounting portion engaging groove 46. Although it is formed so as to have a shape, it is not particularly limited to such a configuration, and as shown in the cross-sectional views of FIGS. 16 (a) and 16 (b), the blade body engaging protrusion 25 and the mounting portion The shape of the engaging groove portion 46 may be configured to have an arc shape in cross section.

Further, in the above embodiment, a linear protrusion (cutting body engaging protrusion 25) is formed on the blade body side, and a linear groove portion (mounting portion engaging groove portion 46) is formed on the cutting generation blade side. However, the structure is not limited to this, and as shown in FIG. 17, the blade body 2 is a linear blade body formed on a contact surface 26 with a mounting portion on one end side thereof. It is configured to include the engaging groove portion 27, and the mounting portion 41 is formed on one surface of the side facing one end side of the blade body 2 (bottom surface 45 in contact with the end surface of the blade body 2 on one end side). It may be configured to include a linear mounting portion engaging protrusion 48, and the mounting portion engaging protrusion 48 may be configured to engage the blade body engaging groove portion 27. In the configuration shown in FIG. 17, the blade body engaging groove portion 27 is configured to extend in the radial direction of the blade body 2, and the mounting portion engaging protrusion 48 extends in the radial direction of the blade body 2. It is configured.

The groove width of the blade body engaging groove portion 27 (width in the width direction of the blade body 2) and the groove depth dimension can be appropriately set. For example, the groove width is about 0.2 mm to 2 mm. , The groove depth is formed to be about 0.1 mm to 1 mm. Such a blade body engaging groove portion 27 is formed by, for example, performing laser processing, etching processing, cutting processing, wire cutting processing, or the like on a contact surface with a mounting portion 41 arranged on one end side of the blade body 2. be able to.

The width of the mounting portion engaging protrusion 48 (width in the direction along the width direction of the blade body 2 <width in the direction perpendicular to the longitudinal direction of the mounting portion 41>) and the height dimension shall be appropriately set. However, for example, the width is formed to be about 0.2 mm to 2 mm and the height is formed to be about 0.1 mm to 1 mm. Such a mounting portion engaging protrusion 48 can be formed, for example, by performing a cutting process or an etching process on one surface of the mounting portion 41. Further, for example, a linear groove can be formed by laser processing, etching processing, cutting processing, wire cutting processing, or the like, and the linear member can be accommodated and arranged in the linear groove. The linear member housed in the linear groove is arranged with the exposed portion protruding from one surface of the mounting portion 41. Here, the linear member is preferably formed of a metal material such as a metal wire. Further, it is preferable that the linear member is adhesively fixed in the linear groove with a resin or the like.

Further, as shown in FIG. 17B, the mounting portion engaging protrusion 48 is formed in a region between the cutting edge portion 42 of the cutting generation blade 4 and the through hole 43. The mounting portion engaging protrusion 48 is formed at the center position in the width direction of the mounting portion 41. Here, the forming area of the mounting portion engaging protrusion 48 is not particularly limited, and for example, the mounting portion is located in the region between the end portion of the mounting portion 41 opposite to the cutting edge portion 42 and the through hole 43. It may be configured to form the engaging protrusion 48, or the mounting portion engaging protrusion 48 may be formed in the region between the side edge portion of the mounting portion 41 and the through hole 43. May be good. Further, the number of the mounting portion engaging protrusions 48 is not particularly limited, and a plurality of mounting portion engaging protrusions 48 may be formed. When a plurality of mounting portion engaging protrusions 48 are formed, it is preferable to form a blade body engaging groove portion 27 in which each mounting portion engaging protrusion 48 is engaged (sandwiched).

Further, as shown in FIG. 17A, the blade body engaging groove portion 27 is on a contact surface with a mounting portion 41 arranged on one end side of the blade body 2, and is on the radial outer side of the blade body 2. It is formed in the region between the end edge and the bolt hole 21 (of the two bolt holes 21, the bolt hole 21 arranged on the outer side in the radial direction of the blade body). Here, the blade body engaging groove portion 27 is formed so that the above-mentioned mounting portion engaging protrusion 48 engages with the blade body engaging protrusion 48, and corresponds to the formation position of the mounting portion engaging protrusion 48. Therefore, the forming position of the blade body engaging groove portion 27 is not particularly limited. Further, the number of the blade main body engaging groove portions 27 can also correspond to the number of the mounting portion engaging protrusions 48.

Here, since the position of the notch generation blade 4 can be adjusted in the direction along the radial direction of the blade body 2 on one end side of the blade body 2, the mounting portion engaging protrusion 48 engages the blade body. In the state of being engaged with the groove portion 27, the cutting generation blade 4 is configured so that the installation position can be changed in the radial direction of the blade body 2 on one end side of the blade body 2. That is, the length of the blade body engaging groove 27 and the length of the mounting portion engaging protrusion 48 are such that the cutting generation blade 4 is in a state where the mounting portion engaging protrusion 48 is engaged with the blade body engaging groove 27. However, it is configured so that it can move on the end surface of the blade body 2 on one end side in the radial direction of the blade body 2. For example, in the present embodiment, as shown in FIGS. 18A and 18B, the cutting edge of the cutting generation blade 4 is configured to be able to protrude from the upper end of the blade body 2 in the range of 0 mm to 5 mm. The difference between the length of the blade main body engaging groove 27 and the length of the mounting protrusion 48 is 5 mm or more. More specifically, the length of the blade main body engaging groove portion 27 is configured to be 5 mm or more longer than the length of the mounting portion engaging protrusion 48. In FIG. 18A, the end of the mounting portion engaging protrusion 48 on the opposite side of the cutting edge portion 42 and the end of the blade body engaging groove portion 27 on the opposite side of the outer peripheral edge portion of the blade body 2 It shows a situation in which the cutting edge of the cutting generation blade 4 is flush with the upper end of the blade body 2 (protrusion amount is 0 mm) in a state where the portions are in contact with each other.

Even with the configuration shown in FIGS. 17 and 18, the blade body 2 is provided with a linear blade body engaging groove 27 formed on a contact surface with the mounting portion 41 on one end side thereof. The mounting portion 41 is provided with a linear mounting portion engaging protrusion 48 formed on one surface of the side facing one end side of the blade body 2, and the mounting portion engaging protrusion 48 is the blade main body. It is configured to engage the engagement groove portion 27. By providing such a configuration, when setting the cut generation blade 4 with respect to the blade body 2, the longitudinal direction of the cut generation blade 4 and the radial direction of the blade body 2 are accurately matched to cut. The built-in generation blade 4 can be fixed to one end side of the blade body 2. That is, as in the conventional case, the longitudinal direction of the cutting generation blade 4 and the radial direction of the blade body 2 do not match, and the longitudinal direction of the cutting generation blade 4 is tilted with respect to the radial direction of the blade body 2. The two receiving blades 75, which are attached to the opposite surfaces of the lower rotary holders 74 and 74, effectively prevent the situation where the notch generation blade 4 is set on the blade body 2 from occurring. It is possible to extremely effectively suppress that the tip end portion of the cut generation blade 4 collides with any one of the 75 and the cut generation blade 4 is broken.

Further, since the linear mounting portion engaging protrusion 48 is engaged with the linear blade body engaging groove portion 27, a cut is generated even if the corrugated cardboard sheet is continuously slit. When the blade 4 is inserted into the corrugated cardboard sheet, it is possible to effectively prevent the blade 4 from rotating slightly in the direction in which the longitudinal direction of the cutting generation blade 4 deviates from the radial direction of the blade body 2 due to an impact. It is possible to extremely effectively prevent the tip portion of the cut generation blade 4 from colliding with 75 and the cut generation blade 4 from being broken.

Further, in the cutting blade shown in FIGS. 17 and 18, the blade body engaging groove portion 27 and the mounting portion engaging protrusion 48 are configured to be linear with a relatively narrow width. The structure is not particularly limited to this, and for example, as shown in FIG. 19 (a) and FIG. 19 (b), which is a sectional view thereof, the blade body engaging groove portion 27 is wide with a width dimension of 2 mm or more. As shown in FIGS. 20 (a) to 20 (d), the notch generation blade 4 while the mounting portion engaging protrusion 48 is engaged with the blade body engaging groove portion 27. However, the installation position may be changed in the direction along the radial direction of the blade body 2 on one end side of the blade body 2. In FIG. 20, on one side of the mounting portion 41 of the cutting generation blade 4 (the bottom surface 45 side in contact with the end surface on one end side of the blade body 2), both side edges of the mounting portion 41 along the radial direction of the blade body 2 The mounting portion engaging protrusion 48 is formed by notching the portion along the radial direction of the blade body 2 and also notching the back surface side of the cutting edge portion 42. The width of the mounting portion engaging protrusion 48 is configured to be the same along the radial direction of the blade body 2. Further, the through hole 43 is formed so as to open on the mounting portion engaging protrusion 48. Further, the blade body engaging groove portion 27 is formed in a region including the bolt hole 21 on the contact surface with the mounting portion 41 on one end side of the blade body 2. Here, FIG. 20A is a plan view of the cutting generation blade 4 when viewed from above, and FIG. 20B is a cross-sectional view showing a KK cross section shown in FIG. 20A. Is. 20 (c) is a back view of the cutting generation blade 4, and FIG. 20 (d) is a cross-sectional view showing an LL cross section shown in FIG. 20 (a).

Even in the configuration shown in FIGS. 19 and 20, since the mounting portion engaging protrusion 48 is engaged with the blade body engaging groove portion 27, the above-mentioned effect, that is, with respect to the blade body 2. When setting the cutting generation blade 4, the longitudinal direction of the cutting generation blade 4 and the radial direction of the blade body 2 are accurately matched, and the cutting generation blade 4 is fixed to one end side of the blade body 2. It is possible to exert the effect of being able to do it.

In the configuration shown in FIGS. 19 and 20, the cross-sectional viewing rectangle is as shown in FIGS. 19 (b) and 20 (d) as the form of the blade main body engaging groove 27 and the mounting portion engaging protrusion 48. Although it is formed so as to have a shape, it is not particularly limited to such a configuration, and as shown in the cross-sectional views of FIGS. 21 (a) and 21 (b), the blade body engaging groove 27 and the mounting portion are engaged. The shape of the collision portion 48 may be configured to have an arc shape in cross section.

Further, in the cutting blade shown in FIGS. 17 and 18, the blade body engaging groove portion 27 is configured to extend in the radial direction of the blade body 2, and the mounting portion engaging protrusion 48 is configured. It is configured to extend in the radial direction of the blade body 2, but for example, as shown in FIG. 22, the mounting portion engaging protrusion 48 extends in a direction perpendicular to the radial direction of the blade body 2. The blade body 2 may be formed so as to include a plurality of blade body engaging grooves 27 extending in a direction perpendicular to the radial direction of the blade body 2. Each blade body engaging groove portion 27 is formed on a contact surface with a mounting portion 41 arranged on one end side of the blade body 2. Further, it is preferable that the blade main body engaging groove portions 27 are arranged at the same interval along the radial direction of the blade main body 2.

Even with the configuration shown in FIG. 22, since the linear mounting portion engaging protrusion 48 engages with the linear blade body engaging groove portion 27, the above-mentioned effect, that is, the blade body 2 On the other hand, when setting the cut generation blade 4, the longitudinal direction of the cut generation blade 4 and the radial direction of the blade body 2 are accurately matched, and the cut generation blade 4 is fixed to one end side of the blade body 2. It is possible to exert the effect of being able to do it.

Since the blade body 2 is configured to include a plurality of blade body engaging grooves 27 extending in a direction perpendicular to the radial direction thereof, the blade body 2 is attached to the blade body engaging groove 27 as shown in FIG. By changing the engagement position with the portion engaging protrusion 48, the amount of protrusion of the cutting edge of the cutting generation blade 4 from the upper end (outer peripheral edge) of the blade body 2 can be changed stepwise. In addition, in FIG. 23A, among the plurality of blade body engaging grooves 27, the blade body engaging groove 27 arranged most radially inside the blade body 2 and the mounting portion engaging protrusion 48 are engaged. In the fitted state, the cutting edge of the cutting generation blade 4 is flush with the upper end of the blade body 2 (protrusion amount is 0 mm).

Further, when the cutting blade 1 is configured by the configuration shown in FIG. 22, the cutting blade 4 cuts in the radial inside of the blade main body 2 due to the impact when the cutting blade 4 abuts or breaks through the corrugated cardboard sheet. Even if a force that moves the generation blade 4 acts, the cutting generation blade 4 causes the blade body 2 to move due to the action of the mounting portion engaging protrusion 48 and the blade body engaging groove 27 that are engaged with each other. It is possible to prevent the blade from moving inward in the radial direction. That is, when the configuration shown in FIG. 22 is adopted, when the cutting generation blade 4 is inserted into the corrugated cardboard sheet, the longitudinal direction of the cutting generation blade 4 slightly deviates from the radial direction of the blade body 2 due to the impact. While effectively preventing rotation, it is also possible to prevent the notch generation blade 4 from moving inward in the radial direction of the blade body 2.

Further, as shown in FIG. 22, even when each blade body engaging groove portion 27 is configured so as to extend in a direction perpendicular to the radial direction of the blade body 2, each blade body engaging groove portion 27 is formed. The position is not particularly limited, and each blade main body engaging groove portion 27 may be formed in the region between the cutting edge portion 42 and the through hole 43 of the cutting generation blade 4, and the mounting portion on the side opposite to the cutting edge portion 42. Each blade body engaging groove portion 27 may be formed in the region between the end portion of the 41 and the through hole 43. The mounting portion engaging protrusion 48 configured to extend in a direction perpendicular to the radial direction of the blade body 2 is engaged with the blade body engaging groove 27 formed in the blade body 2. Therefore, the forming position is formed so as to correspond to the forming position of the blade main body engaging groove portion 27.

Further, in the above embodiment, a linear protrusion (cutting body engaging protrusion 25) is formed on the blade body side, and a linear groove portion (mounting portion engaging groove 46) is formed on the cutting generation blade side. However, as shown in FIG. 24 (a) and FIG. 24 (b), which is a cross-sectional view taken along the line MM, the blade body 2 comes into contact with the mounting portion 41 on one end side thereof. The blade body engaging portion 28 and the blade body engaging notch 29 formed on the surface are provided, and as shown in FIGS. 25 (a) to 25 (d), the mounting portion 41 is the blade body 2. It may be configured to include a mounting portion engaging notch 49 and a mounting portion engaging portion 51 formed on one surface of the side facing one end side. The blade body engaging notch 29 and the blade body engaging portion 28 have contact surfaces including one side edge region in the thickness direction of the blade body 2 on the contact surface with the mounting portion 41 on one end side of the blade body 2. It is formed by notching along the radial direction of the blade body 2 and notching the contact surface of the radial outer end portion of the blade body 2. Further, the mounting portion engaging notch 49 and the mounting portion engaging portion 51 are formed by cutting out a region corresponding to the blade body engaging portion 28 on one surface of the mounting portion 41 facing one end side of the blade body 2. Has been done. The mounting portion engaging notch 49 is formed so as to extend to the inner end of the mounting portion 41 in the radial direction of the blade body 2. Further, the width dimension of the blade body engaging portion 28 and the width dimension of the mounting portion engaging notch 49 are configured to be the same, and the height dimension of the blade body engaging portion 28 and the mounting portion are configured to be the same. The depth dimension of the engaging notch 49 is also configured to be the same. There is. Here, FIG. 25 (a) is a plan view of the cutting generation blade 4 when viewed from above, and FIG. 25 (b) is a cross-sectional view showing an NN cross section shown in FIG. 25 (a). Is. 25 (c) is a back view of the cutting generation blade 4, and FIG. 25 (d) is a cross-sectional view showing an OO cross section shown in FIG. 25 (a).

The blade body engaging notch 29 is provided with a blade body notch bottom surface 29a perpendicular to the thickness direction of the blade body 2, and the blade body engaging portion 28 is a blade body engaging portion facing the blade body notch bottom surface 29a. The side wall surface 28a is provided, and the mounting portion engaging portion 51 includes a protruding surface 51a that abuts on the cutout bottom surface 29a of the blade body and a mounting portion engaging side wall surface 51b that abuts on the blade body engaging side wall surface 28a. There is. Further, the mounting portion engaging cutout portion 49 includes a mounting portion cutout bottom surface 49a that abuts on the protruding surface 28b of the blade body engaging portion 28.

Further, in a state where the mounting portion engaging side wall surface 51b is in contact with the blade body engaging side wall surface 28a, the cut generation blade 4 is located on one end side of the blade body 2 in a direction along the radial direction of the blade body 2. The installation position can be changed.

Here, at least a part of the blade body engaging portion 28 is formed in a region radially outside the blade body 2 from the bolt hole 21, and is a contact surface with the mounting portion 41 on one end side of the blade body 2. With respect to the above, as shown in FIG. 24A, in a plan view in which the radial outer portion of the blade body 2 is upward and the radial inner portion of the blade body 2 is downward, the blade body engaging portion is used. The blade body engaging side wall surface 28a included in the 28 is preferably formed so as to face the left side.

Even in the configuration shown in FIGS. 24 and 25, since the mounting portion engaging side wall surface 48b is in contact (engagement) with the blade body engaging side wall surface 25a, the above-mentioned effect, that is, When setting the cut generation blade 4 with respect to the blade body 2, the longitudinal direction of the cut generation blade 4 and the radial direction of the blade body 2 are accurately matched, and the cut generation blade 4 is set on the blade body 2. The effect of being able to be fixed to one end side can be exhibited.

Further, in particular, at least a part of the blade body engaging portion 28 is formed in a region radially outer of the blade body 2 than the bolt hole 21, and the contact surface with the mounting portion 41 on one end side of the blade body 2 As shown in FIG. 24A, the blade body engaging portion 25 is viewed in a plan view in which the radial outer portion of the blade body 2 is upward and the radial inner portion of the blade body 2 is downward. Since the blade body engaging side wall surface 28a of the blade body is formed so as to face the left side, a notch generation blade 4 is installed on one end of the blade body 2, and the bolt 50 is screwed into the bolt hole 21. When fixing the notch generation blade 4, the bolt head of the bolt 50 and the notch generation blade 4 come into contact with each other, and the notch generation blade 4 rotates with the bolt 50, as shown in FIG. In addition, the longitudinal direction of the cutting generation blade 4 and the radial direction of the blade body 2 do not match, and the cutting generation blade 4 is tilted in the longitudinal direction of the cutting generation blade 4 with respect to the radial direction of the blade body 2. It is possible to effectively suppress the occurrence of a situation in which the blade is set on the blade body 2.

1 Cutting tool 2 Blade body 21 Bolt hole 25 Blade body engaging protrusion 27 Blade body engaging groove 28 Blade body engaging 28a Blade body engaging Side wall surface 28b Protruding surface 29 Blade body engaging Notch 29a Blade body Notch bottom surface 3 Groove cutting blade 4 Notch generation blade 41 Mounting part 42 Cutting edge part 43 Through hole 45 Bottom surface of mounting part 46 Mounting part engaging groove part 48 Mounting part engaging protrusion 49 Mounting part engaging notch part 49a Mounting part Notch bottom surface 51 Mounting part engaging part 51a Protruding surface 51b Mounting part engaging side wall surface 50 Bolt 70 Grooving device

Claims (17)

A notch generation blade that is attached to one end side of a fan-shaped blade body provided in a cutting blade for forming a slit in a sheet material and forms the end of the slit.
It is provided with a mounting portion that can be detachably attached to one end side of the blade body and a cutting edge portion formed at one end of the mounting portion.
The mounting portion is formed corresponding to a bolt hole provided on one end side of the blade body, and has an elongated through hole along the radial direction of the blade body and a side facing the one end side of the blade body. It is equipped with a mounting groove that is formed on one surface.
The notch generation is characterized in that the mounting portion engaging groove portion is configured to be engageable with a blade body engaging protrusion having the blade body on a contact surface with the mounting portion on one end side thereof. blade. The notch generation blade according to claim 1, wherein the mounting portion engaging groove portion is configured to extend in the radial direction of the blade body. In a state where the blade body engaging protrusion is engaged with the mounting portion engaging groove portion, the notch generation blade changes its installation position on one end side of the blade body in a direction along the radial direction of the blade body. The notch generating blade according to claim 1 or 2, characterized in that it is configured to be possible. The mounting portion includes a plurality of mounting portion engaging grooves.
The notch generation blade according to claim 1, wherein each mounting portion engaging groove portion is formed so as to extend in a direction perpendicular to the radial direction of the blade body. The notch generation blade according to claim 4, wherein the engaging groove portions of the mounting portions are arranged at the same interval along the radial direction of the blade body. A notch generation blade that is attached to one end side of a fan-shaped blade body provided in a cutting blade for forming a slit in a sheet material and forms the end of the slit.
It is provided with a mounting portion that can be detachably attached to one end side of the blade body and a cutting edge portion formed at one end of the mounting portion.
The mounting portion is formed corresponding to a bolt hole provided on one end side of the blade body, and has an elongated through hole along the radial direction of the blade body and a side facing the one end side of the blade body. It is equipped with a mounting protrusion that is formed on one surface.
The notch generation is characterized in that the mounting portion engaging protrusion is configured to be engageable with a blade body engaging groove portion that the blade body has on a contact surface with the mounting portion on one end side thereof. blade. The notch generation blade according to claim 6, wherein the mounting portion engaging protrusion is configured to extend in the radial direction of the blade body. With the mounting portion engaging protrusion engaged with the blade body engaging groove portion, the notch generating blade changes its installation position on one end side of the blade body in a direction along the radial direction of the blade body. The notch generating blade according to claim 6 or 7, characterized in that it is configured to be possible. The notch generation blade according to claim 6, wherein the mounting portion engaging protrusion is formed so as to extend in a direction perpendicular to the radial direction of the blade body. The mounting portion engaging protrusion is composed of a linear member accommodated and arranged in a linear groove formed on one surface of the blade body facing the one end side, and the linear member is formed of the linear member. The cut-generating blade according to any one of claims 6 to 9, wherein the exposed portion is arranged so as to protrude from one surface of the blade body facing the one end side. The notch generation blade according to claim 10, wherein the linear member is formed of a metal material. A notch generation blade that is attached to one end side of a fan-shaped blade body provided in a cutting blade for forming a slit in a sheet material and forms the end of the slit.
It is provided with a mounting portion that can be detachably attached to one end side of the blade body and a cutting edge portion formed at one end of the mounting portion.
A side edge region in the thickness direction of the blade body on the contact surface is cut out along the radial direction of the blade body on the contact surface on the one end side of the blade body to which the mounting portion is attached. The joint notch and the blade body engaging part are formed,
The mounting portion is formed corresponding to a bolt hole provided on the contact surface on the one end side of the blade body, and has an elongated through hole along the radial direction of the blade body and the one end of the blade body. It is provided with a mounting portion engaging notch and a mounting portion engaging portion formed on one surface of the side facing the contact surface on the side.
The mounting portion engaging cutout portion and the mounting portion engaging portion are formed by cutting out a region corresponding to the blade body engaging portion on one surface of the mounting portion facing the one end side of the blade body. And
The mounting portion engaging portion has a protruding surface that can come into contact with the bottom surface of the blade body notch that is perpendicular to the thickness direction of the blade body that the blade body engaging notch has, and that the blade body engaging portion has. It is equipped with a mounting part engaging side wall surface that can come into contact with the blade body engaging side wall surface facing the bottom surface of the blade body notch.
The mounting portion engaging notch portion is a notch generation blade characterized in that the mounting portion notch bottom surface capable of contacting a protruding surface of the blade body engaging portion is provided. At least a part of the mounting portion engaging portion is formed in a region closer to the cutting edge portion than the through hole.
With respect to one surface of the mounting portion facing the one end side of the blade body, the mounting portion engaging side wall surface included in the mounting portion engaging portion is viewed in a plan view with the cutting edge portion facing upward. The notch generating blade according to claim 12, wherein the cutting blade is formed so as to face the left side. In a state where the mounting portion engaging side wall surface is in contact with the blade body engaging side wall surface, the notch generating blade is installed at one end side of the blade body in a direction along the radial direction of the blade body. The notch generation blade according to claim 12 or 13, wherein the blade is configured to be modifiable. The notch generation blade according to any one of claims 1 to 14, wherein the cutting edge portion is a flat blade. The notch generation blade according to any one of claims 1 to 14, further comprising the semi-cylindrical cutting edge portion. The notch generating blade according to any one of claims 1 to 16, wherein the tip of the cutting edge portion has a cutting edge notch.

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