JP6010789B1 - Cutting tool - Google Patents

Abstract

A cutting tool capable of effectively preventing thin beard-like cutting waste from remaining on a cutting end surface of a corrugated cardboard sheet. A cutting tool for cutting a sheet material while rotating, comprising a fan-shaped blade body and a cutting blade portion disposed on an outer periphery of the blade body, the cutting blade portion Comprises an arcuate first cutting blade formed along the outer periphery of the cutter body, and a plurality of second cutting blades arranged at predetermined intervals along the first cutting blade. Cutting tool for cutting. [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.

  As a packaging box for storing or moving an article, a cardboard box manufactured by assembling a cardboard sheet 100 as shown in FIG. 10 is known. The upper lid and the bottom plate of the cardboard box are formed by folding slits 101 and 102 in a part of the cardboard sheet 100 so that the cut portions overlap each other.

  In forming the slits 101 and 102, a grooving device is generally used, and a cutting tool 60 as shown in FIG. 11 is often used for the grooving device.

  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. 12 is a side view showing a schematic configuration of the grooving device, and FIG. 13 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 100 using the grooving device 70 having the above configuration will be described. As shown in FIG. 12, the corrugated board sheet 100 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. As a result, the cutting tool 60a is sandwiched in the gap between the receiving blades 75 and 75, and the corrugated cardboard sheet 100 is cut to form the front slit 101 having the end portion 53 as the end point as shown in FIG. Similarly, the other cutting tool 60b is sandwiched in the gap between the receiving blades 75, 75, the cardboard sheet 100 is cut, and the rear slit 102 starting from the starting end 54 is formed.

  Here, when a corrugated cardboard sheet is cut using a cutting tool as shown in FIG. 11, there is a problem that thin whisker-like cutting waste 101a remains on the cut end face as shown in FIG. More specifically, in the corrugated cardboard sheet cut by the cutting tool, a corrugated core c is usually disposed between the front liner a and the back liner b as shown in FIG. As shown in FIG. 15, the intermediate portion between the crest portion and the trough portion of the core c is crushed into a substantially S shape by pressing the cutting tool and the receiving blade at the time of cutting. The cutting line may be cut in a state, and the cutting line may cross a plurality of crests and troughs obliquely instead of being parallel to the waveform direction of the core c. Accordingly, in FIG. 15, the portion indicated by d in the center core c becomes thin cutting waste 101 a, which is connected to the cutting end surface of the corrugated paper and hangs like a whisker and remains. It has been confirmed that this thin cutting waste 101a has a width of 1 to 2 mm, a short length of a few tens of mm, and a long length of 300 mm or more.

  An object of the present invention is to provide a cutting tool capable of effectively preventing such thin beard-like cutting waste from remaining on the cut end face of a corrugated cardboard sheet.

The object of the present invention is a cutting tool for cutting a sheet material while rotating, comprising a fan-shaped blade body and a cutting blade portion disposed on an outer peripheral portion of the blade body, The cutting blade portion is predetermined along the first cutting blade in a region excluding the arc-shaped first cutting blade formed along the outer peripheral portion of the blade body and both ends of the arc-shaped first cutting blade. It is achieved by a cutting tool characterized by comprising a plurality of second cutting blades arranged at intervals and cutting beard-like cutting waste remaining on the cutting end face of the sheet material .

  Further, with respect to the cutting tool, the second cutting blade is formed on at least a part of a protruding portion protruding from the first cutting blade toward the radially outer side of the blade body and a peripheral edge of the protruding portion. It is preferable to provide a blade.

  Moreover, it is preferable that the blade formed in the periphery of the said protrusion part is formed in the peripheral area | region of the said protrusion part which faces the rotation direction of the said cutter main body.

  Moreover, it is preferable that the blade formed in the periphery of the said protrusion part is formed over the whole region of the periphery of the said protrusion part.

  Moreover, it is preferable to further include a grooved blade that is disposed on the side surface of the blade body between the second cutting blades and extends from the edge of the first cutting blade toward the radially inner side of the blade body. .

  The groove-shaped blade includes a groove portion having a predetermined length formed in the blade body, and the groove portion has a blade at a connection corner portion with a surface of the blade body on a side surface along a longitudinal direction of the groove portion. It is preferable to provide.

  Further, the groove blade is inclined with respect to a virtual line parallel to the radial direction of the blade body passing through the end of the groove blade on the first cutting blade side, and the groove blade It is preferable that the edge part inside a cutter main body is arrange | positioned rather than the said virtual line at the rotation direction upstream of the said cutter main body.

  Moreover, it is preferable that the said cutting 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.

  ADVANTAGE OF THE INVENTION According to this invention, the cutting tool for cutting which can prevent effectively that a thin beard-like cutting waste remains on the cutting end surface of a corrugated cardboard sheet can be provided.

It is a top view of the cutting tool for cutting which concerns on one Embodiment of this invention. It is a principal part enlarged view in the AA cross section of FIG. It is a principal part enlarged plan view of the cutter for cutting shown in FIG. It is a principal part enlarged plan view of the cutter for cutting shown in FIG. It is sectional drawing showing the BB cross section of FIG. It is explanatory drawing for demonstrating the action | operation of the cutting tool for cutting shown in FIG. It is a principal part enlarged plan view which shows the modification of the cutting tool for cutting shown in FIG. It is a principal part expanded sectional view which shows the modification of the cutting tool for cutting shown in FIG. It is schematic structure sectional drawing 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 top view of the conventional cutting tool. It is a side view which shows schematic structure of the grooving apparatus to which the cutting tool shown in FIG. 11 was attached. It is a front view which shows schematic structure of the grooving apparatus to which the cutting tool shown in FIG. 11 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 plan view showing a cutting tool according to one embodiment of the present invention, and FIG. 2 is an enlarged view of a main part in the AA cross section. The cutting blade 1 is a blade for cutting a sheet material such as a corrugated cardboard sheet or a synthetic resin sheet while rotating. As shown in FIGS. 1 and 2, the blade body 2, the cutting blade portion 3, And a cutting generation blade 4.

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

  The cutting blade part 3 is a blade part for cutting a sheet material to form a slit and removing thin beard-like cutting waste remaining on the cut end face. The main body 2 is provided on both side edges in the thickness direction. The cutting blade portion 3 includes an arc-shaped first cutting blade 31 formed along the outer peripheral portion of the blade body 2 and a plurality of second cutting blades 32 arranged along the first cutting blade 31 at predetermined intervals. And. The first cutting blade 31 is a blade for mainly cutting a sheet material to form a slit, and the second cutting blade 32 is a thin remaining on the cut end surface while cutting the sheet material to form a slit. A blade having a function of cutting off beard-like cutting waste.

  The 2nd cutting blade 32 is provided with the protrusion part 32a which protrudes toward the radial direction outer side of the cutter main body 2 from the 1st cutting blade 31, and the blade 32b formed in at least one part of the periphery of the protrusion part 32a. It is configured. In the present embodiment, the blade 32b formed on the periphery of the protrusion 32a is formed over the entire periphery of the protrusion 32a. In the case where the blade 32b is formed on a part of the peripheral edge of the protruding portion 32a, the blade 32b is an essential part of FIG. 3 from the viewpoint of efficiently cutting and extinguishing beard-like cutting waste remaining on the cutting end surface. As shown in the enlarged plan view, it is preferably formed in the peripheral region of the protrusion 32 a facing the rotation direction of the blade body 2.

  Moreover, the cutting tool 1 according to the present invention is disposed on the side surface of the blade body 2 between the second cutting blades 32 and is directed radially inward of the blade body 2 from the edge of the first cutting blade 31. It is comprised so that the groove-shaped blade 5 extended may be further provided. The grooved blade 5 is a blade having a function of cutting off thin beard-like cutting waste remaining on the cutting end face. In the present embodiment, the grooved blade 5 is disposed in the vicinity of the root of the second cutting blade 32. The grooved blade 5 is preferably arranged on the rotational direction side of the blade body 2 with respect to the second cutting blade 32. Further, as shown in the enlarged plan view of the main part of FIG. 4, the grooved blade 5 is an imaginary line parallel to the radial direction of the blade body 2 passing through the end of the grooved blade 5 on the first cutting blade 31 side. It is preferable to configure so as to be inclined with respect to L. In particular, it is preferable that the end of the grooved blade 5 inside the blade body 2 is arranged on the upstream side of the virtual line L in the rotation direction of the blade body 2 so that the grooved blade 5 is inclined. . The grooved blade 5 may be configured to overlap the imaginary line L.

  As shown in FIG. 3 and the sectional view of FIG. 5 representing the BB cross section of FIG. 3, the grooved blade 5 includes a groove portion 51 having a predetermined length formed in the blade body 2, The groove part 51 is configured to include a blade at a connection corner part 51 b with the surface of the cutter body 2 on the side surface 51 a along the longitudinal direction of the groove part 51. In addition, each of the connection corner portions 51b on the side surface 51a along the longitudinal direction of the groove portion 51 may be configured to include a blade, or one of the connection corner portions 51b may be configured to include a blade. . In the case where either one of the connection corners 51b is provided with a blade, both side surfaces 51a along the longitudinal direction of the groove 51 are used from the viewpoint of efficiently cutting and extinguishing the beard-like cutting waste remaining on the cutting end face. , 51a, it is preferable that the connecting corner 51b on the side surface arranged upstream with respect to the rotation direction of the cutter body is provided with a blade (in FIG. 3 and FIG. 5, it is arranged on the right side). Connecting corner 51b).

  The incision generating blade 4 is a blade portion for cutting off one end of a scrap generated when slitting is performed by the cutting tool 1 from a sheet material such as a corrugated cardboard sheet, and has a diameter from one end of the outer peripheral surface of the cutter body 2. It protrudes outward in the direction 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. 12 and 13, for example. The method for forming slits in a sheet material such as a corrugated cardboard sheet is the same as the method described in the background art above, and thus detailed description thereof is omitted here.

  The cutting tool 1 for cutting according to the present embodiment includes a second cutting blade 32 provided so as to project outward from the first cutting blade 31 which is a blade for cutting a sheet material to form a slit. Since it comprises so that two or more may be provided, as shown in FIG. 6, when the 2nd cutting blade 32 pulls out from the downward side of a sheet | seat material, the said 2nd cutting blade 32 is formed in a cutting | disconnection end surface. It becomes possible to enter between the thin whisker-shaped cutting waste and the cut end face to cut off the cutting waste. This prevents beard-like cutting waste from remaining on the sheet material after slit processing, and the cut surface formed when cutting a sheet material such as a corrugated cardboard sheet can be in a clean state. it can.

  In addition, since the cutting tool 1 for cutting according to the present embodiment is configured to further include the grooved blade 5, one of the beard-shaped cutting wastes in the process of coming out from the lower side to the upper side of the sheet material. The part or the whole is caught by the grooved blade 5 and cut and removed by the action of the blade formed in the connection corner 51b of the grooved blade 5. Here, in this embodiment, as shown in the enlarged plan view of the main part of FIG. 4, the grooved blade 5 of the blade body 2 that passes through the end of the grooved blade 5 on the first cutting blade 31 side. Since it is configured to incline with respect to the virtual line L parallel to the radial direction, it is easy to scoop up and cut the whisker-like cutting waste in the process in which the grooved blade 5 is pulled out from the lower side of the sheet material. Become. As a result, it becomes possible to cut and remove beard-like cutting waste more effectively.

  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. In the above embodiment, the plan view shape of the peripheral edge of the protruding portion 32a in the second cutting blade 32 is substantially semicircular as shown in FIG. 3, but is not particularly limited to such a configuration. For example, you may comprise so that the planar view shape of the periphery of the protrusion part 32a may become various shapes, such as a trapezoid, a square, a triangle, a pentagon.

  Moreover, in the said embodiment, you may comprise the form of the cutting blade part 2 in a saw blade shape, as shown in the principal part enlarged plan view of FIG. In the configuration of FIG. 7, the shape of the projection 32a of the second cutting blade 32 in a plan view is a trapezoidal shape, and portions corresponding to the sides of the trapezoid are formed in a curved shape to form a saw blade configuration.

  Moreover, in the said embodiment, although comprised so that the grooved blade 5 may be provided further, this grooved blade 5 may be abbreviate | omitted and the cutting tool 1 may be comprised. Further, the second cutting blade 32 may be omitted and the grooved blade 5 may be provided.

  Further, in the above embodiment, the grooved blade 5 is arranged on the rotational direction side of the blade body 2 with respect to the second cutting blade 32 and adjacent to the second cutting blade 32. The configuration is not particularly limited. For example, you may comprise so that the edge part by the side of the 1st cutting blade 31 of the grooved blade 5 may be arrange | positioned in the substantially middle position between 2nd cutting blades 32. FIG. Further, the groove-shaped blade 5 may be disposed upstream of the second cutting blade 32 in the rotation direction of the blade body 2 and adjacent to the second cutting blade 32.

  Moreover, in the said embodiment, although the grooved blade 5 formed in the side surface of the cutter main body 2 is comprised so that it may become cross-sectional view saddle shape, as shown in sectional drawing of FIG. For example, it may be formed in a V shape in cross section as shown in FIG. 8A, or may be formed in a U shape in cross section as shown in FIG. 8B. May be. Moreover, as shown in FIG.8 (c), you may form in a cross-sectional view substantially letter shape. From the viewpoint of efficiently cutting and removing the whisker-like cutting waste remaining on the cut end face, the cross-sectional shape of the grooved blade 5 is formed in a substantially letter-like shape in cross-section as shown in FIG. It is preferable that the connection corner portion 51b is configured to include a blade.

  Moreover, in the said embodiment, in order to comprise the cutter 1 for a cutting process so that a slit can be formed with respect to a sheet | seat material, the cutting blade part 3 is each provided in the thickness direction both-sides edge of the cutter main body 2. FIG. However, it is not particularly limited to such a form. For example, the single cutting blade portion 3 may be arranged along the outer peripheral portion of the blade body 2 so that the sheet material can be simply cut and separated (see the schematic configuration sectional view of FIG. 9). .

DESCRIPTION OF SYMBOLS 1 Cutting tool 2 Cutting body 3 Cutting blade part 31 First cutting blade 32 Second cutting blade 32a Projection part 4 Cutting generation blade 5 Grooved blade 51 Groove part 51b Connection corner part 70 Grooving device

Claims (8)

A cutting tool for cutting a sheet material while rotating,
A fan-shaped blade body, and a cutting blade portion disposed on the outer periphery of the blade body,
The cutting blade portion is an arc-shaped first cutting blade formed along the outer peripheral portion of the blade body;
In a region excluding both ends of the arc-shaped first cutting blade, a plurality of blades are disposed at predetermined intervals along the first cutting blade, and the whisk-like cutting waste remaining on the cutting end surface of the sheet material is cut . A cutting tool having two cutting blades.   The second cutting blade includes a protruding portion protruding from the first cutting blade toward a radially outward direction of the cutter body, and a blade formed on at least a part of a peripheral edge of the protruding portion. The cutting tool for cutting according to claim 1.   The cutting blade according to claim 2, wherein the blade formed on the peripheral edge of the protruding portion is formed in a peripheral region of the protruding portion facing the rotation direction of the blade body.   The blade for cutting according to claim 2, wherein the blade formed on the periphery of the protrusion is formed over the entire periphery of the protrusion.   A grooved blade is further provided on the side surface of the blade body between the second cutting blades, and extends from the edge of the first cutting blade toward the radially inner side of the blade body. The cutting tool for cutting according to any one of claims 1 to 4. The groove-shaped blade includes a groove portion having a predetermined length formed in the blade body,
6. The cutting tool according to claim 5, wherein the groove includes a blade at a connecting corner with the surface of the blade body on a side surface along the longitudinal direction of the groove. The groove blade is inclined with respect to a virtual line parallel to the radial direction of the blade body passing through the end of the groove blade on the first cutting blade side,
7. The cutting tool according to claim 5, wherein an end portion of the grooved blade on the inner side of the blade body is disposed on the upstream side in the rotation direction of the blade body with respect to the virtual line. The cutting blade according to any one of claims 1 to 7, wherein the cutting 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. Cutlery.

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