JP5233015B1 - Cutting tool - Google Patents

Abstract

The present invention provides a cutting tool capable of making a cut surface formed when a sheet material such as a corrugated cardboard sheet is cut into a clean state.
A cutting tool for cutting a sheet material, comprising a fan-shaped blade body and a blade portion disposed along an outer peripheral portion of the blade body, and a side surface of the blade body includes: A cutting tool for cutting, in which a rough surface portion in contact with a cutting end surface of a sheet material cut by the blade portion is formed.
[Selection] Figure 1

Description

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

  A cardboard box manufactured by assembling a cardboard sheet 50 as shown in FIG. 7 is known as a packaging box for storing or moving things. The top lid and bottom plate of the cardboard box are formed by folding slits 51 and 52 formed in a part of the cardboard sheet 50 so that they are overlapped with each other.

  In forming the slits 51 and 52, a grooving device is generally used. For this grooving device, a cutting tool 60 as shown in FIG. 8 is often used (for example, Patent Document 1). See prior art).

  In this cutting tool 60, a cutting blade 62 and a cutting blade 63 are integrally formed on a blade body 61 formed in a fan shape. The notch generating 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 includes corner portions 64 on both sides in the width direction of the end surface. Yes. The cutting blades 63 are provided on both sides in the thickness direction of the blade body 61 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. FIG. 9 is a side view showing a schematic configuration of the grooving device, and FIG. 10 is a front view. Two cutting tools 60 described above are attached to the grooving device 70, and the configuration of the grooving device 70 will be described below with the cutting tools 60a and 60b as the respective cutting tools.

  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-like upper rotary holders 73 and 73 and a pair of lower sides are arranged. Rotating holders 74 and 74 are provided.

  Two cutting blades 60a and 60b are sandwiched between a pair of upper rotating holders 73 and 73 by fasteners (not shown) such as bolts. These cutting blades 60a, 60b are spaced apart from each other along the outer circumference of the pair of rotary holders 73, 73, and the respective cut generating blades 62a, 62b face each other along the outer circumferential direction. It is attached. On the other hand, the two receiving blades 75, 75 are attached to the opposing surfaces of the pair of lower rotating holders 74, 74 at a predetermined interval corresponding to the thickness dimension of the cutting blades 60a and 60b. It is done.

  Next, a method for forming a slit in the cardboard sheet 50 using the grooving device 70 having the above configuration will be described. As shown in FIG. 9, the corrugated cardboard sheet 50 is moved along the sheet feeding line L of the grooving device 70 in a state where the upper rotating holders 73 and 73 and the lower rotating holders 74 and 74 are rotated. Feed to the grooving device 70 from the right side. Thereby, the cutting tool 60a is sandwiched between the receiving blades 75 and 75, the cardboard sheet 50 is cut, and the front slit 51 having the end portion 53 as an end point as shown in FIG. 7 is formed. Similarly, the other cutting tool 60b is sandwiched in the gap between the receiving blades 75, 75, the cardboard sheet 50 is cut, and the rear slit 52 starting from the starting end 54 is formed.

JP-A-9-39118

However, when slitting is performed using a conventionally used cutting tool, there is a problem that thin beard-like cutting waste 50a remains on the cut surface as shown in FIG. More specifically, the corrugated cardboard cut by the cutting tool is generally structured such that a corrugated core c is disposed between the front liner a and the back liner b as shown in FIG. The intermediate portion between the crest portion and the trough portion of the center c is crushed into a substantially S shape as shown in FIG. 12 by pressing of the cutting tool and the receiving blade at the time of cutting. In some cases, the cutting line is not parallel to the waveform direction of the central core c, but crosses a plurality of crests and troughs obliquely. Accordingly, in FIG. 12, the portion indicated by d in the center core c becomes thin cutting waste 50a, which is connected to the cutting end portion of the corrugated paper and hangs like a whisker and remains. It has been confirmed that the thin cutting waste 50a has a width of 1 to 2 mm, a short length of 10 mm or less, and a long length of 300 mm or more.

  The present invention has been made in order to solve such a problem, and a cutting tool that can clean a cutting surface formed when a sheet material such as a cardboard sheet is cut is provided. The purpose is to provide.

The object of the present invention is a cutting tool for cutting a sheet material, and includes a fan-shaped blade body and a blade portion disposed along an outer peripheral portion of the blade body, and a side surface of the blade body. Is formed with a rough surface portion that comes into contact with the cut end surface of the sheet material cut by the blade portion, and the rough surface portion is spaced apart from the blade edge of the blade portion by a predetermined distance. This is achieved by the cutting tool formed along the circumferential direction .

  Since such a rough surface portion is provided on the side surface of the blade body, when the blade portion cuts the sheet material and falls to the lower side of the sheet material, the rough surface portion is in contact with the cutting end surface of the sheet material. It will move toward the lower side. At this time, it is possible to drop the cutting waste on the lower side of the sheet while effectively removing the beard-like cutting waste remaining on the cutting end face of the sheet material by friction with the uneven surface in the rough surface portion and removing it from the cutting end face. Become.

  In the cutting tool, it is preferable that the rough surface portion is formed along a circumferential direction of the blade body with a predetermined interval between the rough surface portion and the cutting edge of the blade portion. As described above, by configuring the rough surface portion along the circumferential direction of the blade body, the cut surface can be made clean in the entire cut end surface formed on the sheet material.

  Moreover, it is preferable that the said rough surface part is formed so that the said rough surface part may become strip | belt shape of the same width. In this way, by forming the rough surface portion so as to have a band shape with the same width, the contact length (contact time) of the rough surface portion with respect to an arbitrary position on the cut end surface of the sheet material can be made uniform. The cutting amount of the end face can be made constant, and it is possible to prevent the entire shape of the cutting end face or part of the shape from becoming uneven due to excessive cutting of a part of the cutting end face, and the cutting end face has a clean straight shape. The sheet material can be cut to have.

  Moreover, it is preferable that the outermost surface of the rough surface portion is formed so as to be flush with a cutting edge portion of a blade portion disposed along the outer peripheral portion of the blade body. By configuring the outermost surface of the rough surface portion so as to be flush with the cutting edge portion in this way, excessive cutting of the cut end surface by the rough surface portion can be suppressed, and cutting waste can be effectively removed.

  Moreover, it is preferable that the said rough surface part is comprised by forming a some linear groove with respect to the side surface of the said cutter main body. Moreover, it is preferable that the said rough surface part is formed by performing knurling with respect to the side surface of the said cutter main body.

  Moreover, the said blade part is each provided in the thickness direction both-sides edge of the said cutter main body along the outer peripheral part of the said cutter main body, The said rough surface part is each provided in the thickness direction both sides of the said cutter main body. It is preferable.

  ADVANTAGE OF THE INVENTION According to this invention, the cutting tool which can make the cut surface formed when cutting sheet | seat materials, such as a corrugated cardboard sheet, into a beautiful state can be provided.

It is a side view of the cutting tool for cutting which concerns on one Embodiment of this invention. It is AA sectional drawing of FIG. It is explanatory drawing explaining the action | operation of the cutting tool for cutting shown in FIG. It is sectional drawing which shows the modification of the cutting tool for cutting shown in FIG. It is a side view which shows the modification of the cutting tool for cutting shown in FIG. It is a side view which shows the modification of the cutting tool for cutting shown in FIG. It is a schematic plan view of the corrugated cardboard sheet after the slit is formed. It is a side view of the conventional cutting tool. It is a side view which shows schematic structure of the grooving apparatus with which the cutting tool was attached. It is a front view which shows schematic structure of the grooving apparatus with which the cutting tool was attached. It is an enlarged view which shows an example of the slit formed in the corrugated cardboard sheet. It is explanatory drawing for demonstrating the structure of a cardboard sheet | seat.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view showing a cutting tool according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line AA. The cutting tool 1 is a cutting tool for cutting and slitting a sheet material such as a corrugated cardboard sheet or a synthetic resin sheet. As shown in FIGS. 1 and 2, the cutting tool body 2, the cutting part 21, The rough surface portion 3 and the cut generating blade 4 are provided.

  The blade body 2 is formed of a metal material such as stainless steel or iron, and is formed in a fan shape in a side view as shown in FIG.

  The blade portion 21 is arranged along the outer peripheral portion of the blade body 2 in the same manner as the conventional cutting tool 60 (see FIG. 8). Since the blade part 21 in the present embodiment is configured so as to be able to form a slit, it is provided on each side edge in the thickness direction of the blade body 2 as shown in FIG.

  The rough surface portion 3 is constituted by a concavo-convex surface provided on the side surface of the blade body 2, and has a function of contacting the cutting end surface of the sheet material cut by the blade portion 21 and removing cutting waste remaining on the cutting end surface. ing. The rough surface portions 3 are provided on both side surfaces in the thickness direction of the blade body 2, and are formed by forming a plurality of linear grooves 31 on the side surface of the blade body 2. More specifically, for example, a plurality of linear grooves 31 having a width of 1 mm to 5 mm and a depth of 1 mm to 5 mm are formed at a pitch interval of 1 mm to 5 mm. Each linear groove 31 is formed such that its longitudinal direction is the radial direction of the blade body 2. The rough surface portion 3 is formed along the circumferential direction of the blade body 2 with a predetermined interval between the rough surface portion 3 and the blade edge 21 a of the blade portion 21. As shown in FIGS. 1 and 2, the width of the rough surface portion 3 (the length in the radial direction of the blade body 2) is the same along the circumferential direction of the blade body 2 (strip shape of the same width). The outermost surface 3a of the rough surface portion 3 is flush with the cutting edge portion 21a of the blade portion 21 arranged along the outer peripheral portion of the blade body 2 as shown in the sectional view of FIG. It is formed to become. The outermost surface 3a is configured to protrude slightly outward (in a direction perpendicular to the side surface) from the side surface of the cutter body 2 where the rough surface portion 3 is not formed, and the cutting edge of the blade portion 21 You may comprise so that it may not become flush with the part 21a.

  The incision generating blade 4 is a blade for cutting off one end of a scrap piece that is generated when slitting is performed by the cutting blade 1 from the corrugated cardboard sheet, and radially outward from one end of the outer peripheral surface of the blade body 2. It protrudes so as to be flush with the end face of the blade body 2, and has corners on both sides in the width direction of the end face.

  The cutting tool 1 having the above configuration is used by being attached to a grooving device 70 as shown in FIGS. 9 and 10, for example. Since the method for forming the slits in the corrugated cardboard sheet is the same as the method described in the background art above, detailed description is omitted here.

  Since the cutting blade 1 for cutting according to the present embodiment has a rough surface portion 3 that is in contact with the cut end surface of the sheet material cut by the blade portion 21 on the side surface of the blade body 2, as shown in FIG. When the blade portion cuts the sheet material and falls to the lower side of the sheet material, the rough surface portion moves toward the lower side of the sheet material while being in contact with the cut end surface of the sheet material. At this time, it is possible to drop the cutting waste on the lower side of the sheet while effectively removing the beard-like cutting waste remaining on the cutting end face of the sheet material by friction with the uneven surface in the rough surface portion and removing it from the cutting end face. Become. As a result, the cut surface formed when a sheet material such as a corrugated cardboard sheet is cut can be made clean.

  Moreover, since the rough surface part 3 is comprised in the substantially whole region so that the circumferential direction of the cutter main body 2 may be followed, it is possible to make the cut surface beautiful in the whole cut end surface formed in the sheet material. It becomes.

  Moreover, since the rough surface part 3 is formed so that it may become a strip | belt shape of the same width along the circumferential direction of the cutter main body 2, the contact length (contact) of the rough surface part with respect to the arbitrary positions in the longitudinal direction of the cutting end surface of a sheet | seat material. Time) can be made uniform, the amount of cutting of the cut end face by the rough surface portion can be made constant, and the entire cut end face or part of the shape of the cut end face becomes uneven due to excessive cutting of the cut end face. The sheet material can be cut so that the cut end surface has a clean straight shape.

Moreover, since the outermost surface 3a of the rough surface portion 3 is formed so as to be flush with the cutting edge portion 21a of the blade portion 21 disposed along the outer peripheral portion of the cutter body 2, the cutting end surface of the rough surface portion is cut. Scraping can be effectively removed while suppressing excessive shaving.
The rough surface portion 3 is

  The cutting tool 1 according to the embodiment of the present invention has been described above, but the specific configuration of the cutting tool 1 is not limited to the above embodiment. For example, in the above-described embodiment, in order to configure the cutting tool 1 so that a slit can be formed in the sheet material, the blade portions 21 are provided on both side edges in the thickness direction of the blade body 2. It is not particularly limited to such a form. For example, the single blade portion 21 may be arranged along the outer peripheral portion of the blade body 2 as shown in the schematic sectional view of FIG. 4 so that the sheet material can be simply cut and separated. Good.

  Moreover, in the said embodiment, although the rough surface part 3 is comprised by forming a some linear groove with respect to the side surface of the cutter main body 2, it is not specifically limited to such a structure, For example, FIG. As shown in FIG. 5, the rough surface portion 3 may be formed by performing knurling on the side surface of the blade body 2 so as to form a grid-like knurled unevenness. Alternatively, as shown in FIG. 6, the rough surface portion 3 may be configured by forming a plurality of holes 32 having a predetermined depth on the side surface of the blade body 2.

  Moreover, in the said embodiment, although comprised so that the rough surface part 3 may each be provided in the thickness direction both sides | surfaces of the cutter main body 2, you may comprise so that the rough surface part 3 may be provided only in any one surface.

DESCRIPTION OF SYMBOLS 1 Cutting tool 2 Cutting body 21 Blade part 21a Cutting edge part 3 Rough surface part 3a Outermost surface 31 of rough surface part Linear groove 4 Cutting generation blade 50 Sheet material

Claims (6)

A cutting tool for cutting sheet material,
A fan-shaped blade body, and a blade portion disposed along the outer periphery of the blade body,
On the side surface of the blade body, a rough surface portion that is in contact with the cut end surface of the sheet material cut by the blade portion is formed ,
The rough surface portion is a cutting tool that is formed along the circumferential direction of the blade body with a predetermined gap between the rough surface portion and the blade edge of the blade portion . The cutting tool according to claim 1, wherein the rough surface portion is formed to have a band shape with the same width. The outermost surface of the rough surface, the cutting machining tool according to claim 1 or 2 are arranged along the outer peripheral portion is formed so as to be cutting edges and flush the blade portion of the cutting tool body. The rough surface portion, the relative side of the tool body, the cutting machining tool according to claim 1 which is constructed 3 by forming a plurality of linear grooves. The rough surface portion, the relative side of the tool body, the cutting machining tool according to any one of claims 1 to 3, which is formed by knurling. The blade portion is provided on each side edge in the thickness direction of the blade body along the outer peripheral portion of the blade body, and the rough surface portion is provided on each side surface in the thickness direction of the blade body. The cutting tool for cutting according to any one of 1 to 5 .

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