JP6767648B1 - Cutting tool for cutting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting blade for cutting, which can easily set the amount of protrusion of the cutting edge portion of the cutting generation blade from the blade main body. SOLUTION: This is a cutting blade for forming a slit in a sheet material, and includes a blade main body, a grooving blade for forming a slit, a cutting generation blade 4 for forming an end portion of the slit, and a cutting. The cutting generation blade 4 is provided with a generation blade stepwise positioning mechanism, and the cutting generation blade 4 is provided with a mounting portion 41 and a cutting edge portion 42 that can be detachably attached to one end side of the blade body. , It is composed of a plurality of protrusion engaging groove portions 82 formed on one surface of the mounting portion 41 that comes into contact with the bolt head of the bolt installed in the bolt hole through the through hole 43, and each protrusion portion. The engaging groove portions 82 are formed at predetermined intervals along the radial direction of the blade body, and are formed so that the bolt can be screwed into the bolt hole while the bolt head engaging protrusion is sandwiched. A blade for cutting that is characterized by being [Selection diagram] Fig. 5

Description

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

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. 24 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. 25 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 cut 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. The 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. 26 and 27. FIG. 26 is a side view showing a schematic configuration of the grooving device, and FIG. 27 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 rotary shaft 71 and the lower rotary 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 rotary holders 73, 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. 27, 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. 27. 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. 24 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. 25, 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 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.

Japanese Unexamined Patent Publication No. 2005-186261

The cutting blade disclosed in Patent Document 1 is excellent in that only the cutting generation blade with severe wear condition can be replaced, and the amount of protrusion of the cutting edge portion from the blade body can be adjusted. However, when setting the amount of protrusion of the cutting edge from the blade body, use a dedicated protrusion amount adjustment jig to set the notch generation blade on the blade body, or use a separate scale. It is necessary to set the cutting generation blade on the blade body while measuring the protrusion amount, and there is a problem that it is difficult to easily set the protrusion amount of the cutting edge portion from the blade body. In particular, there is a problem that it is extremely difficult to adjust the amount of protrusion of the cutting edge portion of the cutting generation blade from the blade main body in a state where the cutting blade is set in the grooving device.

The present invention has been made to solve such a problem, and provides a cutting blade capable of easily setting the amount of protrusion of the cutting edge portion of the cutting generation blade from the blade main body. The purpose.

The object of the present invention is a cutting blade for forming a slit in a sheet material, which includes a blade body, a grooving blade for forming the slit, and a cutting generation blade for forming the end of the slit. The cutting edge is provided with a stepwise positioning mechanism for the cutting edge, the blade body is formed in a fan shape, and a bolt hole is provided on one end side, and the grooving blade is provided along both side edges in the thickness direction of the blade body. The notch generating blade is provided with each, and includes a mounting portion that is detachably attached to one end side of the blade body and a cutting edge portion formed at one end portion of the mounting portion. Is formed corresponding to the bolt hole of the blade body, and includes an elongated through hole along the radial direction of the blade body, and the notch generation blade stepwise positioning mechanism is the said in the bolt head. It is formed on one surface of the mounting portion that comes into contact with the bolt head engaging protrusion formed on the contact surface with the mounting portion and the bolt head of the bolt installed in the bolt hole through the through hole. It is composed of a plurality of protrusion engaging grooves, and the protrusion engaging grooves are formed at predetermined intervals along the radial direction of the blade body, and the bolt head engaging protrusions are formed. This is achieved by a cutting blade characterized in that the bolt is formed so as to be screwable into the bolt hole in a sandwiched state.

Further, regarding the cutting tool, each protrusion engaging groove is formed on a virtual circle having a radial dimension corresponding to the distance from the axis of the bolt shaft of the bolt to the bolt head engaging protrusion. It is preferably formed as an arcuate groove to be formed.

Further, it is preferable that each of the protrusion engaging grooves is formed around the elongated through hole.

Further, the bolt head engaging protrusion is preferably a ring-shaped protrusion protruding from the contact surface of the bolt head with the mounting portion.

Further, the bolt head engaging protrusion is composed of a ring member housed and arranged in a circular groove formed on a contact surface of the bolt head with the mounting portion, and the circular groove is formed by the above. It is preferable that the ring member is formed around the axis of the bolt shaft of the bolt, and the exposed portion of the ring member is arranged so as to protrude from the contact surface of the bolt head with the mounting portion.

Further, the bolt head engaging protrusion can be configured as an arcuate protrusion protruding from the contact surface of the bolt head with the mounting portion.

Further, it is preferable that a plurality of the arc-shaped protrusions are provided, and each arc-shaped protrusion is arranged concentrically.

Further, the bolt head engaging protrusion is composed of a linear member accommodated and arranged in a linear groove formed on a contact surface of the bolt head with the mounting portion, and the linear groove is formed of a linear groove. It is formed as an arcuate groove centered on the axis of the bolt shaft of the bolt, and the linear member is arranged in a state where the exposed portion of the bolt head protrudes from the contact surface with the mounting portion of the bolt head. Can be configured to be.

Further, the bolt head engaging protrusion may be configured as a rod-shaped protrusion protruding from the contact surface of the bolt head with the mounting portion.

Further, a plurality of the rod-shaped protrusions may be provided, and the rod-shaped protrusions may be arranged so as to be arranged on concentric circles.

Further, the blade body is provided with a blade body engaging protrusion formed on a contact surface with the mounting portion on one end side thereof, and the mounting portion faces the one end side of the blade body. It is provided with a mounting portion engaging groove portion formed on the other surface on the side, and the blade body engaging protrusion may be configured to engage with the mounting portion engaging groove portion.

Further, the blade body engaging protrusion may be configured to extend in the radial direction of the blade body, and the mounting portion engaging groove may be configured to extend in the radial direction of the blade body.

Further, the blade body is provided with a blade body engaging groove formed on a contact surface with the mounting portion on one end side thereof, and the mounting portion is a side facing the one end side of the blade body. It is provided with a mounting portion engaging protrusion formed on the other surface of the blade, and the mounting portion engaging protrusion may be configured to engage the blade body engaging groove portion.

Further, the blade body engaging groove portion may be configured to extend in the radial direction of the blade body, and the mounting portion engaging protrusion may be configured to extend in the radial direction of the blade body.

Further, the blade body includes a blade body engaging portion and a blade body engaging notch formed on a contact surface with the mounting portion on one end side thereof, and the mounting portion is formed on the blade body. The mounting portion engaging notch and the mounting portion engaging portion formed on the other surface of the side facing one end side are provided, and the blade body engaging notch and the blade body engaging portion are described. It is formed by cutting out a side edge region in the thickness direction of the blade body on a contact surface with the mounting portion on the one end side of the blade body along the radial direction of the blade body, and the mounting portion engaging notch is formed. The portion and the mounting portion engaging portion are formed by cutting out a region corresponding to the blade body engaging portion on the other surface of the mounting portion facing the one end side of the blade body, and the blade body. The engaging notch portion includes a blade body notch bottom surface that is perpendicular to the thickness direction of the blade body, and the blade body engaging portion includes a blade body engaging side wall surface that faces the blade body notch bottom surface side. The mounting portion engaging portion includes a protruding surface that abuts on the cutout bottom surface of the blade body and a mounting portion engaging side wall surface that abuts on the blade body engaging side wall surface, and the mounting portion engages. The cutout portion may be configured to include a notched bottom surface of the mounting portion that abuts on the protruding surface of the blade body engaging portion.

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. Further, the width of the cut generation blade can be configured to have substantially the same size as the thickness of the blade body.

Further, the cutting edge portion may be arranged radially outside the outer peripheral edge of the cutting tool body so as to be able to hold the cutting generation blade.

According to the present invention, it is possible to provide a cutting blade for cutting, which can easily set the amount of protrusion of the cutting edge portion of the cutting generation blade from the blade main body.

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. (A) is a plan view of a bolt included in the cutting tool shown in FIG. 1, (b) is a side view seen from the direction of arrow C in (a), and (c) is (a). It is a side view seen from the arrow D direction in (a), and (d) is a cross-sectional view about the direction along the axis of the bolt axis shown in (a). It is explanatory drawing which shows the deformation example of the bolt head engaging protrusion formed in a bolt. It is explanatory drawing which shows the deformation example of the bolt head engaging protrusion formed in a bolt. 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 E direction in a), (c) is a side view when viewed from the arrow F direction in (a), and (d) is an arrow in (a). It is a side view when viewed from the view G direction. (A) is a plan view showing a modified example of the cut generating blade shown in FIG. 5, and (b) is a plan view showing a modified example of the cut generating 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 a plan 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), and (c) is the back surface view (bottom view) of the cut generating blade. It is explanatory drawing for demonstrating the deformation example of the blade body provided with the blade for cutting processing shown in FIG. It is explanatory drawing for demonstrating the deformation example of the cutting generation blade provided in the cutting cutting edge shown in FIG. It is explanatory drawing for demonstrating the deformation example of the blade body provided with the blade for cutting processing shown in FIG. 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 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 sectional view which shows the LL cross section in (a). Is. It is sectional drawing which shows the modification of the blade body and the notch generation blade shown in FIG. 15 and FIG. 16, 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 blade body provided with the blade for cutting processing shown in FIG. 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 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). Is. 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 blade body provided with the blade for cutting processing shown in FIG. 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 cross-sectional view which shows the QQ cross section in a), (c) is the back surface view (bottom view) of the cut generating blade, and (d) is the cross-sectional view which shows the RR cross section in (a). Is. 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. 25 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. 25 is attached.

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, a notch generation blade 4, and a notch generation blade stepwise positioning mechanism 8 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 a bolt hole 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 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. 25). 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 main 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 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 notch 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 blade 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 long in the direction along 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 41 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. 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, as shown in FIGS. 6A to 6D, the notch generation blade stepwise positioning mechanism 8 is formed on the contact surface 50c of the bolt head 50a of the bolt 50 with the mounting portion 41. As shown in FIG. 5, the engaging protrusion 81 is formed on one surface 41a of the mounting portion 41 that comes into contact with the bolt head 50a of the bolt 50 installed in the bolt hole 21 via the through hole 43. It is composed of a plurality of protrusion engaging groove portions 82. The protrusion engaging groove portions 82 are formed at predetermined intervals along the radial direction of the blade body 2, and the bolt 50 can be screwed into the bolt hole 21 with the bolt head engaging protrusion 81 sandwiched. It is formed so as to be. In the present embodiment, as shown in FIGS. 6A to 6D, the bolt head engaging protrusion 81 is configured as a ring-shaped protrusion protruding from the contact surface 50c of the bolt head 50a with the mounting portion 41. Has been done. The bolt head engaging protrusion 81 formed as the ring-shaped protrusion is formed in a ring shape centered on the axis of the bolt shaft 50b of the bolt 50. Further, as shown in FIG. 5A, each protrusion engaging groove portion 82 has a radial dimension corresponding to the distance from the axial center of the bolt shaft 50b of the bolt 50 to the bolt head engaging protrusion 81. It is formed as an arcuate groove 82a formed on the circle K. Each protrusion engaging groove portion 82 is formed around an elongated through hole 43. Regarding the forming position of each protrusion engaging groove portion 82, for example, the center of the virtual circle K corresponding to each protrusion engaging groove portion 82 is about 1 mm to 3 mm along the radial direction of the blade body 2. It is preferable that the positions are spaced apart from each other. By configuring the center position of each virtual circle K to be, for example, 2 mm, the protrusion amount of the cutting edge portion 42 of the cutting generation blade 4 with respect to the blade body 2 can be changed in 2 mm increments. It will be possible. Further, each protrusion engaging groove portion 82 may be formed so that the pitch dimension of the center of the virtual circle K corresponding to each protrusion engaging groove portion 82 is the same along the radial direction of the blade body 2. Preferably, the pitch dimension between the centers of the virtual circle K corresponding to each protrusion engaging groove portion 82 may be configured to have different length dimensions along the radial direction of the blade body 2. Here, FIG. 6A is a plan view of the bolt, FIG. 6B is a side view seen from the direction of arrow C in FIG. 6A, and FIG. 6C is a view. It is a side view seen from the arrow D direction of 6 (a). Further, FIG. 6D is a cross-sectional view taken along the axis of the bolt shaft 50b of FIG. 6A.

The groove width and the groove depth dimension of each protrusion engaging groove portion 82 can be appropriately set. For example, the groove width is about 0.2 mm to 2 mm and the groove depth is about 0.1 mm to 1 mm. Form. Such a protruding portion engaging groove portion 82 can be formed by, for example, performing laser processing, etching processing, cutting processing, wire cutting processing, or the like on one surface 41a of the mounting portion 41. Further, since the bolt 50 is configured so that the bolt head engaging protrusion 81 can be screwed into the bolt hole 21 while being sandwiched between the protrusion engaging groove 82, the bolt head engaging protrusion 81 Is formed corresponding to the groove width and groove depth of the protrusion engaging groove 82 so as to have a width dimension and a height dimension such that the protrusion engaging groove portion 82 can be slid while being fitted inside the protrusion engaging groove portion 82. To.

Further, the bolt head engaging protrusion 81 can be formed, for example, by performing a cutting process or an etching process on the contact surface 50c of the bolt head 50a with the mounting portion 41. Further, for example, a circular groove can be formed by laser processing, etching processing, cutting processing, wire cutting processing, or the like, and the ring member can be accommodated and arranged in the circular groove. The circular groove is formed around the axis of the bolt shaft 50b of the bolt, and the exposed portion of the ring member housed in the circular groove is the attachment portion 41 of the bolt head 50a. It is arranged so as to protrude from the contact surface 50c. Here, the ring member is preferably formed of a metal material such as a metal wire. Further, it is preferable that the ring member is adhesively fixed in the circular groove with a resin or the like.

Here, as shown in FIG. 7, the bolt head engaging protrusion 81 can also be configured as an arcuate protrusion 81a protruding from the contact surface 50c of the bolt head 50a with the mounting portion 41. When adopting the arc-shaped protrusion 81a configuration, it is preferable to provide a plurality of the arc-shaped protrusions 81a, and each arc-shaped protrusion 81a is arranged on a concentric circle centered on the axis of the bolt shaft 50b. .. Note that FIG. 7 is a side view corresponding to FIG. 6 (b).

When the arc-shaped protrusion 81a is configured to be provided by the bolt head engaging protrusion 81 in this way, for example, a linear groove (a bolt possessed by the bolt 50) is subjected to laser processing, etching processing, cutting processing, wire cutting processing, or the like. An arc-shaped groove centered on the axis of the shaft 50b) is formed, and the linear member can be accommodated and arranged in the linear groove (arc-shaped groove). The linear member housed in the arcuate groove is arranged with its exposed portion protruding from the contact surface with the mounting portion at the bolt head. 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 arcuate groove with a resin or the like.

Further, as shown in FIG. 8, the bolt head engaging protrusion 81 can be configured as a rod-shaped protrusion 81b protruding from the contact surface 50c of the bolt head 50a with the mounting portion 41. When adopting the rod-shaped protrusion 81b configuration, it is preferable to include a plurality of the rod-shaped protrusions 81b, and each rod-shaped protrusion 81b is arranged on a concentric circle centered on the axis of the bolt shaft 50b. Note that FIG. 8 is a side view corresponding to FIG. 6 (b).

The cutting tool 1 having the above configuration is used by being attached to, for example, a grooving device 70 as shown in FIGS. 26 and 27. 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 bolt head engaging protrusion 81 formed on the contact surface 50c of the bolt head 50a with the mounting portion 41 is installed in the bolt hole 21 via the through hole 43. A plurality of protrusion engaging groove portions 82 formed on one surface 41a of the mounting portion 41 in contact with the bolt head 50a of the bolt 50 to be formed are provided, and each protrusion engaging groove portion 82 has a diameter of the blade body 2. Since the structure is formed at predetermined intervals along the direction, the upper end (outside) of the blade body 2 can be changed by changing the engagement position between the protrusion engagement groove 82 and the bolt head engagement protrusion 81. The amount of protrusion of the cutting edge of the cutting generation blade 4 from the peripheral edge) can be changed stepwise. Further, since each protrusion engaging groove 82 is configured so that the bolt 50 can be screwed into the bolt hole 21 in a state where the bolt head engaging protrusion 81 is sandwiched, the protrusion engaging groove 82 The screwing of the bolt 50 can be advanced while checking the degree of pinching of the bolt head engaging protrusion 81 with respect to the blade body 2, and the position of the notch generating blade 4 with respect to the blade body 2 is maintained at a desired position. The operator can recognize that the setting has been completed.

Further, even when the amount of protrusion of the cutting edge portion 42 from the blade body 2 is adjusted with the cutting blade 1 set in the grooving device 70, the blade 50 is not removed from the bolt hole 21. Loosen the bolt to such an extent that the notch generation blade 4 can move along the radial direction of the blade main body 2 on one end side of the main body 2, and the bolt head engaging protrusion 81 with respect to the protrusion engaging groove 82. It is possible to position the notch generation blade 4 with respect to the blade body 2 while checking the degree of pinching with the touch of a finger, and as in the conventional case, the notch generation blade uses a dedicated protrusion amount adjusting jig. There is no need to set 4 on the blade body 2 or set the notch generation blade 4 on the blade body 2 while measuring the protrusion amount separately using a scale, and the blade body 2 of the cutting edge portion 42 of the cut generation blade 4 It is possible to easily set the amount of protrusion from the blade.

Further, since the bolt head engaging protrusion 81 is configured to engage with the protrusion engaging groove 82, the blade body is affected by the impact when the notch generation blade 4 abuts or breaks through the corrugated cardboard sheet. Even if a force that moves the notch generating blade 4 acts inward in the radial direction of 2, the action of the bolt head engaging protrusion 81 and the protrusion engaging groove 82 that are engaged with each other causes cutting. It is possible to effectively prevent the built-in generation blade 4 from moving inward in the radial direction of the blade body 2.

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 cutting edge portion 4 of the cutting generation blade 4 is configured as a flat blade, but for example, as shown in FIG. 9, it is configured as a semi-cylindrical form, and one end portion on the back surface side thereof. Is cut out as shown by the broken lines in FIGS. 9A and 9B, so that a semicircular cutting edge is formed on the outer peripheral edge at one end. 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. 9A is a plan view of the cutting generation blade 4 when viewed from above, and FIG. 9B is a view of the cutting generation blade 4 when viewed from the arrow E direction shown in FIG. 9A. It is a side view of. Further, FIG. 9 (c) is a side view when viewed from the direction of arrow F shown in FIG. 9 (a), and FIG. 9 (d) is the direction of arrow G shown in FIG. 9 (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. 10A. , One or a plurality of 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. 9 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. 10B, one or a plurality of 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 is fixed to the cutting tool body 2 by a single bolt 50. Although the configuration of No. 4 has been described, 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 plurality of bolts 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. 11, 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, as shown in FIG. 12, the mounting portion 41 included in the cutting generation blade 4 is placed on the other surface of the blade body 2 facing one end side (on the end surface of the blade body 2 on one end side). As shown in FIG. 13 (a) and FIG. 13 (b), which is a cross-sectional view taken along the line II, the blade main body 2 is provided with a linear mounting portion engaging groove portion 46 formed on the contact bottom surface 45). A linear blade body engaging protrusion 25 formed on a contact surface with the mounting portion 41 arranged on one end side thereof is provided, and the linear blade body engaging protrusion 25 is provided on the mounting portion 41. It can also be configured to engage (sandwich) with the mounting portion engaging groove portion 46 to be formed. The mounting portion engaging groove portion 46 is configured to extend in the radial direction of the blade body 2, and the blade body engaging protrusion 25 is also configured to extend in the radial direction of the blade body 2. Note that FIG. 12A is a plan view of the cutting generation blade 4 when viewed from above, and FIG. 12B is a cross-sectional view showing a cross section taken along the line HH of FIG. 12A. Further, FIG. 12 (c) is a back view (bottom view of the notch generation blade 4) of FIG. 12 (a).

The groove width of the mounting portion engaging groove portion 46 (width in 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 the other surface of the mounting portion.

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 41 on one end side of the blade body 2. 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 FIGS. 12 (b) and 12 (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 surface view of FIG. 14A, 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. 14 (b), with 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. 14C, 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 that is engaged (sandwiched) with each mounting portion engaging groove portion 46.

Further, as shown in FIG. 13A, 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 edge and the bolt hole 21 in the above. 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. More specifically, the length of the mounting portion engaging groove portion 46 is configured to be longer than the length of the blade body engaging protrusion 25 by a predetermined dimension.

As described above, the blade body 2 is provided with the linear blade body engaging protrusion 25 formed on the contact surface 26 with the mounting portion 41 on one end side thereof, and the mounting portion 41 is the blade body 2. A linear mounting portion engaging groove portion 46 formed on the other surface of the side facing one end side is provided, and the blade body engaging protrusion 25 is configured to engage the mounting portion engaging groove portion 46. By doing so, 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, and the cut generation blade 4 is used as a blade. It can be fixed to one end side of the main body 2. That is, the cutting generation blade 4 is in a state where 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. It is possible to effectively prevent the occurrence of a situation in which the blade is set on the blade body 2.

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 in a 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.

Further, in the configurations shown in FIGS. 12 and 13, the blade body engaging protrusion 25 and the mounting portion engaging groove 46 are configured to be linear with a relatively narrow width. The configuration is not particularly limited, and for example, as shown in FIG. 15 (a) and FIG. 15 (b) which is a cross-sectional view taken along the line JJ, the blade body engaging protrusion 25 has a wide form having a width dimension of 2 mm or more. As shown in FIGS. 16 (a) to 16 (d), while the mounting portion engaging groove portion 46 is engaged with the blade body engaging protrusion 25, the notch generating blade 4 is formed. On one end side of the blade body 2, the installation position may be changed in a direction along the radial direction of the blade body 2. In FIG. 15, 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. 16, the mounting portion engaging groove portion 46 formed on the other surface of the mounting portion 41 of the cut 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. 16A is a plan view of the cutting generation blade 4 when viewed from above, and FIG. 16B is a cross-sectional view showing a KK cross section shown in FIG. 16A. Is. 16 (c) is a back view of the cut generation blade 4, and FIG. 16 (d) is a cross-sectional view showing an LL cross section shown in FIG. 16 (a).

Even in the configuration shown in FIGS. 15 and 16, 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. 15 and 16, the cross-sectional viewing rectangle is as shown in FIGS. 15 (b) and 16 (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. 17 (a) and 17 (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 configurations shown in FIGS. 12 and 13, 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) is formed on the cutting generation blade side. 46) is provided, but the configuration is not limited to such a configuration, and as shown in FIG. 18, a line formed on the contact surface 26 of the blade body 2 with the mounting portion on one end side thereof. The blade body is configured to include an engaging groove portion 27, and the mounting portion 41 is on the other surface of the blade body 2 facing one end side (bottom surface 45 in contact with the end surface of the blade body 2 on one end side). It may be configured to include the linear mounting portion engaging protrusion 48 formed in the blade, 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. 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 extends in the radial direction of the blade body 2. It is configured.

The groove width (width in the width direction of the blade body 2) of the blade body engaging groove portion 27 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 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 the other 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 its exposed portion protruding from the other 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. 18B, the mounting portion engaging protrusion 48 is formed in the region between the cutting edge portion 42 of the cut 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. 18A, the blade body engaging groove portion 27 is on the contact surface with the 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 edge and the bolt hole 21. 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. 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 in a state of being engaged with the groove portion 27. 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. More specifically, the length of the blade body engaging groove portion 27 is configured to be a predetermined dimension longer than the length of the mounting portion engaging protrusion 48.

Even with the configuration shown in FIG. 18, the blade body 2 is provided with a linear blade body engaging groove 27 formed on the contact surface with the mounting portion 41 on one end side thereof, and the mounting portion is provided. 41 is provided with a linear mounting portion engaging protrusion 48 formed on the other surface of the blade body 2 facing one end side, and the mounting portion engaging protrusion 48 is a blade body engaging groove portion. Since it is configured to engage with 27, 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. The notch generation blade 4 can be fixed to one end side of the blade body 2. That is, the cutting generation blade 4 is in a state where 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. It is possible to effectively prevent the occurrence of a situation in which the blade is set on the blade body 2.

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. It is possible to effectively prevent the blade 4 from rotating in a direction in which the longitudinal direction of the cut generation blade 4 deviates from the radial direction of the blade body 2 due to the impact when the blade 4 is inserted into the corrugated cardboard sheet.

Further, in the cutting blade shown in FIG. 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 configuration is not particularly limited, and for example, as shown in FIG. 19A and FIG. 19B, which is a cross-sectional view taken along the line MM thereof, the blade body engaging groove portion 27 has a wide form having a width dimension of 2 mm or more. As shown in FIGS. 20A to 20D, the notch generating blade 4 is a blade while the mounting portion engaging protrusion 48 is engaged with the blade body engaging groove portion 27. On one end side of the main body 2, the installation position may be changed in a direction along the radial direction of the blade main body 2. In FIG. 20, on the other 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. 20 (a) is a plan view of the cutting generation blade 4 when viewed from above, and FIG. 20 (b) is a cross-sectional view showing an NN cross section shown in FIG. 20 (a). Is. 20 (c) is a back view of the cut generation blade 4, and FIG. 20 (d) is a cross-sectional view showing an OO 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 configurations shown in FIGS. 12 and 13, a linear protrusion (cutting body engaging protrusion 25) is formed on the blade body side, and a linear groove portion (mounting portion engaging) is formed on the cutting generation blade side. The groove portion 46) is formed, and for example, as shown in FIG. 22 (a) and FIG. 22 (b) which is a cross-sectional view of the PP, the blade main body 2 is attached on one end side thereof. The blade body engaging portion 28 and the blade body engaging notch 29 formed on the contact surface with the portion 41 are provided, and as shown in FIGS. 23 (a) to 23 (d), the mounting portion 41 is provided. , The mounting portion engaging notch 49 and the mounting portion engaging portion 51 formed on the other surface of the blade body 2 facing the one end side may be provided. 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 the other 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. 23A is a plan view of the cutting generation blade 4 as viewed from above, and FIG. 23B is a cross-sectional view showing a QQ cross section shown in FIG. 23A. Is. Further, FIG. 23 (c) is a back view of the cut generation blade 4, and FIG. 23 (d) is a cross-sectional view showing an RR cross section shown in FIG. 23 (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. 23A, 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. 23 and 24, 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 outside the blade body 2 from 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. 23A, 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 50a 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, so that the notch generation blade 4 is rotated. The notch generation blade 4 is set on the blade body 2 in a state where the longitudinal direction of 4 and the radial direction of the blade body 2 do not match and the longitudinal direction of the cut generation blade 4 is tilted with respect to the radial direction of the blade body 2. It is possible to effectively suppress the occurrence of such a situation.

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 Engagement protrusion 51a Protruding surface 51b Mounting part Engagement side wall surface 8 Notch generation blade Stepwise positioning mechanism 81 Bolt head Engagement protrusion 82 Protrusion engagement groove 50 Bolt 50a Bolt head 50b Bolt shaft 50c Bolt head Contact surface 70 grooving device with mounting part

Claims (20)

A cutting tool for forming slits in the sheet material.
It is equipped with a blade body, a grooving blade that forms a slit, a cut generation blade that forms the end of the slit, and a stepwise positioning mechanism for the cut generation blade.
The blade body is formed in a fan shape and has a bolt hole on one end side.
The grooving blades are provided along both side edges in the thickness direction of the blade body, respectively.
The cut-generating blade includes 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.
The mounting portion is formed corresponding to the bolt hole of the blade body, and has an elongated through hole along the radial direction of the blade body.
In the notch generation blade stepwise positioning mechanism, a bolt head engaging protrusion formed on a contact surface of the bolt head with the mounting portion and a bolt installed in the bolt hole via the through hole are provided. It is composed of a plurality of protrusion engaging grooves formed on one surface of the mounting portion that comes into contact with the bolt head to be held.
The protrusion engaging grooves are formed at predetermined intervals along the radial direction of the blade body, and the bolt can be screwed into the bolt hole with the bolt head engaging protrusion sandwiched. A cutting tool for cutting, which is characterized in that it is formed so as to be. Each of the protrusion engaging grooves is formed as an arc-shaped groove formed on a virtual circle having a radial dimension corresponding to the distance from the axis of the bolt shaft of the bolt to the bolt head engaging protrusion. The cutting tool according to claim 1, wherein the cutting tool is provided. The cutting tool according to claim 1 or 2, wherein each of the protrusion engaging grooves is formed around the elongated through hole. The cutting tool according to any one of claims 1 to 3, wherein the bolt head engaging protrusion is a ring-shaped protrusion protruding from a contact surface of the bolt head with the mounting portion. The bolt head engaging protrusion is composed of a ring member housed and arranged in a circular groove formed on a contact surface of the bolt head with the mounting portion, and the circular groove is formed by the bolt. The ring member is formed around the axis of the bolt shaft to be held, and the ring member is arranged in a state in which an exposed portion thereof protrudes from a contact surface with the mounting portion of the bolt head. Item 4. The cutting tool for cutting. The cutting tool according to any one of claims 1 to 3, wherein the bolt head engaging protrusion is an arcuate protrusion projecting from a contact surface of the bolt head with the mounting portion. The cutting tool according to claim 6, wherein a plurality of the arc-shaped protrusions are provided, and each arc-shaped protrusion is arranged on concentric circles. The bolt head engaging protrusion is composed of a linear member accommodated and arranged in a linear groove formed on a contact surface of the bolt head with the mounting portion, and the linear groove is formed of the bolt. The linear member is formed as an arcuate groove centered on the axis of the bolt shaft, and the exposed portion of the linear member is arranged so as to protrude from the contact surface of the bolt head with the mounting portion. The cutting tool according to claim 6 or 7, wherein the cutting tool is provided. The cutting tool according to any one of claims 1 to 3, wherein the bolt head engaging protrusion is a rod-shaped protrusion protruding from a contact surface of the bolt head with the mounting portion. The cutting tool according to claim 9, wherein a plurality of the rod-shaped protrusions are provided, and each rod-shaped protrusion is arranged on concentric circles. The blade body includes a blade body engaging protrusion formed on a contact surface with the mounting portion on one end side thereof.
The mounting portion includes a mounting portion engaging groove portion formed on the other surface of the blade body facing the one end side.
The cutting tool according to any one of claims 1 to 10, wherein the blade body engaging protrusion is engaged with the mounting groove. The blade body engaging protrusion is configured to extend in the radial direction of the blade body, and the mounting portion engaging groove portion is configured to extend in the radial direction of the blade body. The cutting tool according to claim 11. The blade body includes a blade body engaging groove formed on a contact surface with the mounting portion on one end side thereof.
The mounting portion includes a mounting portion engaging protrusion formed on the other surface of the blade body facing the one end side.
The cutting blade according to any one of claims 1 to 10, wherein the mounting portion engaging protrusion is engaged with the blade body engaging groove portion. The blade body engaging groove portion is configured to extend in the radial direction of the blade body, and the mounting portion engaging protrusion is configured to extend in the radial direction of the blade body. The cutting tool according to claim 13. The blade body includes a blade body engaging portion and a blade body engaging notch formed on a contact surface with the mounting portion on one end side thereof.
The mounting portion includes a mounting portion engaging notch and a mounting portion engaging portion formed on the other surface of the blade body facing the one end side.
The blade body engaging notch and the blade body engaging portion have a side edge region in the thickness direction of the blade body on a contact surface with the mounting portion on the one end side of the blade body in the radial direction of the blade body. It is formed by notching along
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 the other surface of the mounting portion facing the one end side of the blade body. And
The blade body engaging notch includes a blade body notch bottom surface that is perpendicular to the thickness direction of the blade body.
The blade body engaging portion includes a blade body engaging side wall surface facing the cutout bottom surface side of the blade body.
The mounting portion engaging portion includes a protruding surface that abuts on the cutout bottom surface of the blade body and a mounting portion engaging side wall surface that abuts on the blade body engaging side wall surface.
The cutting tool according to any one of claims 1 to 10, wherein the mounting portion engaging notch portion includes a mounting portion notched bottom surface that abuts on a protruding surface of the blade body engaging portion. The cutting tool according to any one of claims 1 to 15, wherein the cutting edge portion of the cutting generation blade is a flat blade. The cutting tool according to any one of claims 1 to 15, wherein the cut generating blade includes the semi-cylindrical cutting edge portion. The cutting tool according to any one of claims 1 to 17, wherein the notch generating blade has a cutting edge notch at the tip of the cutting edge. The cutting blade according to any one of claims 1 to 18, wherein the width of the cutting generation blade is substantially the same as the thickness of the blade body. The cutting tool according to any one of claims 1 to 19, wherein the cutting edge portion is arranged radially outside the outer peripheral edge of the cutting tool body to hold the cutting generation blade.

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