JP2016215302A - Cutting tool for cutting processing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting tool for cutting processing in which a lifetime of the cutting tool for cutting processing that cuts sheet material of corrugated card board and others, namely, the time of cutting tool exchanging can be recognized accurately.SOLUTION: A cutting tool for cutting sheet material under rotation comprises a cutting tool body of a fan-like shape and a cutting blade arranged along the periphery of the cutting tool body. On the side surfaces of the cutting blade, formed are groove-like marks which show that the wearing amount of the cutting blade reaches to a specified amount and the time of cutting tool exchanging has come, and the groove-like marks are constituted by plural linear grooves in parallel to each other.SELECTED DRAWING: 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. For this grooving device, a cutting tool 60 as shown in FIG. 11 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. 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. Thereby, the cutting tool 60a is sandwiched 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 103 as an end point as shown in FIG. Similarly, the other cutting tool 60b is sandwiched between the gaps of the receiving blades 75, 75, whereby the corrugated cardboard sheet 100 is cut, and the rear slit 102 starting from the starting end 104 is formed.

JP-A-9-39118

  When slitting a sheet material such as a corrugated cardboard sheet as described above, the cutting tool installed on the upper rotating holder is sandwiched between the gaps of the two receiving blades installed on the lower rotating holder. At this time, there has been a problem that the cutting blade and the receiving blade of the cutting tool are in sliding contact with each other, and the cutting blade of the cutting tool is worn. If the cutting blade of the cutting tool is worn out, the sharpness of the cutting tool deteriorates, and the cutting surface of the sheet material becomes jagged, or the cutting tool generated when cutting the sheet material is received. Lateral displacement of the sheet material (deformation in a direction perpendicular to the thickness direction of the sheet material) is likely to occur due to the pressing with the blade, and as shown in FIG. There is a possibility that a cutting defect such as remaining on the cut surface of the sheet material may occur. In this way, when the sharpness of the cutting tool deteriorates, it is necessary to replace it with a new cutting tool. However, in the stage before cutting failure occurs on the cut surface of the sheet material, the cutting time of the cutting tool must be replaced in advance. It was difficult to recognize correctly.

  The present invention has been made to solve such a problem, and is for cutting work that can accurately recognize the life of a cutting tool for cutting a sheet material such as a cardboard sheet, that is, the replacement time. The purpose is to provide a knife.

  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 arranged along an outer peripheral portion of the blade body, the cutting A groove-shaped mark is formed on the side surface of the blade to indicate that the wear amount of the cutting blade has reached a predetermined amount and the blade replacement time has been reached, and the groove-shaped mark is formed of a plurality of linear lines parallel to each other. This is achieved by a cutting tool characterized by comprising a groove.

  Moreover, regarding the cutting tool, the linear grooves may be configured to have different groove depths.

  Moreover, you may comprise so that the one edge part in each said linear groove may be arrange | positioned at the same predetermined space | interval between the blade edge | tips of the said cutting blade.

  Further, the cutting blades are respectively provided on both side edges in the thickness direction of the blade body along the outer peripheral portion of the blade body, and the groove mark is formed on the outer side surface of each cutting blade. May be.

  According to the present invention, it is possible to provide a cutting tool capable of accurately recognizing the life of a cutting tool for cutting a sheet material such as a cardboard sheet, that is, the replacement time.

It is a top view of the cutting tool for cutting which concerns on one Embodiment of this invention. It is AA sectional drawing of FIG. FIG. 3 is an enlarged view of a main part of FIG. 2. It is a principal part enlarged view of FIG. It is a principal part enlarged plan view which shows the modification of the cutting tool for cutting shown in FIG. It is an easy expansion top view which shows the modification of the cutting tool for cutting shown in FIG. It is a top view which shows the modification of the cutting tool for cutting shown in FIG. It is a top 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.

  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 an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA, and FIG. 3 is an enlarged view of a main part of FIG. 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 to 3, the blade body 2, the cutting blade 3, A cutting generation blade 4 is provided.

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

  The cutting blade 3 is a blade portion for cutting a sheet material to form a slit, and is provided on both side edges in the thickness direction of the blade body 2 along the outer peripheral portion of the blade body 2. Groove marks 5 are formed on the side surfaces of the cutting blade 3 to indicate that the amount of wear of the cutting blade 3 has reached a predetermined amount and the time for blade replacement has been reached. The groove mark 5 can be formed, for example, by applying laser processing, etching processing, cutting processing, or the like to the side surface of the cutting blade 3. In addition, FIG. 1 shows an example in which the groove-like mark 5 is formed in the vicinity of the incision generating blade 4, but it is not particularly limited to such a configuration, and wear of the cutting blade 3 is remarkable. It can be formed in the part that appears. Further, a plurality of groove marks 5 may be arranged along the length direction of the cutting edge 31 of the cutting blade 3 (the circumferential direction of the blade body 2).

  Further, the groove-like mark 5 shown in FIG. 1 is configured as a set of a plurality of linear linear grooves 51 parallel to each other. In addition, one end portion 511 (end portion on the blade edge 31 side) of each linear groove 51 is disposed with the same predetermined interval from the blade edge 31 of the cutting blade 3. Further, as shown in the enlarged view of the main part of FIG. 4, the virtual line L1 overlapping the linear groove 51b disposed in the center among the linear grooves 51 is the intersection of the virtual line L1 and the cutting edge 31 of the cutting blade 3. It is configured to be perpendicular to the passing virtual line L2. Further, the depth of the groove-like mark 5 (linear groove 51) is such that the amount of thinning (wear) that the blade should be replaced is reduced on the side surface of the cutting blade 3 (side surface region where the groove-like mark 5 is formed). It is only necessary to set the depth so that the groove-like mark 5 disappears with wear when it occurs.

  Moreover, you may comprise so that each of the some linear groove | channel 51 which comprises the groove-shaped mark 5 may have a different groove depth. For example, the depth of one linear groove 51 arranged closest to a region where the side wall thinning of the cutting blade 3 is predicted to occur at an early stage as the starting point of the progress of wear is the depth of the other linear groove 51. You may form so that it may become deeper than the depth. More specifically, for example, in the cutting tool 1 shown in FIG. 1, thinning due to wear from the side surface of the cutting blade 3 near the longitudinal end of the cutting blade 3 on the side where the cutting generation blade 4 is disposed. Is advanced, the depth of the linear groove 51a arranged closest to the notch generating blade 4 is set to be deeper than the linear groove 51b arranged adjacent to the linear groove 51a. May be.

  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.

  Since the cutting blade 1 for cutting according to the present embodiment has a groove mark 5 on the side surface of the cutting blade 3, which indicates that the amount of wear of the cutting blade 3 has reached a predetermined amount and has reached the blade replacement time. The blade replacement time can be easily recognized, and in the previous stage where the cut surface of the sheet material becomes jagged due to wear thinning in the cutting blade 3 of the cutting blade 1, the sheet material Appropriate in the stage before cutting failure such as thin beard-like cutting waste remains on the cut surface of the sheet material due to the lateral displacement of the sheet material due to the pressing between the cutting blade 1 and the receiving blade generated when cutting It becomes possible to easily replace the cutting tool 1 with a new one at the timing. Specifically, in the cutting tool 1 according to this embodiment, the thinning due to wear occurs on the side surface of the cutting blade 3, but as the thinning due to wear progresses, the groove of the groove mark 5 As the depth becomes shallower, the groove-shaped mark 5 will eventually disappear as the side surface region of the cutting blade 3 where the groove-shaped mark 5 is formed wears down. By monitoring the disappearance process of the groove mark 5, it is possible to recognize the replacement time of the blade. For example, the cutting tool 1 is exchanged at a timing at which the groove mark 5 almost disappears, or the cutting blade 1 is exchanged at a timing at which the groove mark 5 completely disappears.

  In the present embodiment, as shown in FIG. 1, the groove mark 5 is configured as a set of a plurality of linear linear grooves 51 that are parallel to each other. When the groove-shaped mark 5 is configured to include a plurality of linear grooves 51 as described above, for example, one linear groove 51 (for example, the linear groove 51a) disappears due to wear thinning on the side surface of the cutting blade 3. At this time, it becomes possible to notify the user that the cutting tool 1 is approaching the time to be replaced, and a new cutting tool 1 is prepared (stock check and product ordering procedure). ) It is possible to alert the user what to do. Then, at the timing when the other linear grooves 51 (for example, the linear grooves 51b, or both the linear grooves 51b and the linear grooves 51c) almost disappear or at the timing when they completely disappear, the cutting tool It becomes possible to alert the user that it is necessary to exchange 1.

  Further, when the plurality of linear grooves 51 constituting the groove mark 5 are configured so as to have different groove depths, for example, the side wall of the cutting blade 3 is thinned at an early stage as a starting point of wear progress. When the depth of one linear groove 51 arranged closest to the region that is predicted to be formed is deeper than the depth of the other linear groove 51, The cutting blade 1 can be configured so that one linear groove 51 and the other linear groove 51 disappear at substantially the same timing. The situation in which the plurality of linear grooves 51 are likely to disappear at substantially the same timing, or the situation where they disappear, is a great alert to the user and indicates that the user needs to replace the cutting tool 1 for cutting. It will be possible to effectively inform.

  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 embodiment, as shown in FIG. 1, the groove mark 5 is formed as a set of three linear grooves 51, and one end portion 511 of each linear groove 51 is formed of the cutting blade 3. Although it arrange | positions so that the same predetermined space | interval may be left | separated between the blade edges 31, and also each linear groove | channel 51 may be adjacently arranged at predetermined | prescribed same space | intervals, it is limited especially to such a structure. Not. For example, as shown in FIG. 5, you may comprise so that the space | interval of each linear groove | channel 51 may differ. Further, as shown in FIG. 6, the interval between one end 511 of each linear groove 51 and the cutting edge 31 of the cutting blade 3 may be different for each linear groove 51. Moreover, if each linear groove | channel 51 is a structure arrange | positioned so that it may mutually become parallel, it will not specifically limit about the specific structure of each linear groove | channel 51, For example, as a form as shown in FIG.7 and FIG.8, Each linear groove 51 can be configured. The form shown in FIG. 7 shows a form in which each linear groove 51 is formed so as to pass through the central portion in the circumferential direction of the blade body 2 and to be substantially parallel to the virtual line L3 along the radial direction of the blade body 2. ing. 8 shows a form in which each linear groove 51 is formed so as to be substantially parallel to the virtual line L4 perpendicular to the virtual line L3.

  Moreover, in the said embodiment, as shown in FIG. 4, the virtual line L1 which overlaps with the linear groove | channel 51b arrange | positioned in the center among each linear groove | channel 51 is the intersection of the said virtual line L1 and the blade edge | tip 31 of the cutting blade 3. As shown in FIG. However, the present invention is not particularly limited to such a configuration, and for example, a virtual that overlaps the linear groove 51b disposed at the center among the linear grooves 51 is configured. Each linear groove 51 may be configured such that the line L1 forms an angle other than perpendicular to the virtual line L2 passing through the intersection of the virtual line L1 and the cutting edge 31 of the cutting blade 3.

  Moreover, in the said embodiment, although the one edge part 511 in each linear groove | channel 51 is arrange | positioned so that the same predetermined space | interval may be provided between the blade edge | tips 31 of the cutting blade 3, it is limited to such a structure. For example, one end 511 of each linear groove 51 may be connected to the blade edge 31. In the case of such a configuration, a notch portion that communicates in the thickness direction of the cutting edge 31 may be formed at one end portion 511 of the linear groove 51.

  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, although the cutting blade 3 is each provided in the thickness direction both sides edge of the cutter main body 2. It is not particularly limited to such a form. For example, a single cutting blade 3 may be arranged along the outer peripheral portion of the blade body 2 as shown in the schematic sectional view of FIG. 9 so that the sheet material can be simply cut and separated. Good.

DESCRIPTION OF SYMBOLS 1 Cutting tool 2 Cutting body 3 Cutting blade 31 Cutting edge 4 Cutting generation blade 5 Groove mark 51 Linear groove 511 One end 100 of linear groove 100 Sheet material 70 Groove device 75 Receiving blade

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 arranged along an outer peripheral portion of the blade body, the cutting A groove-shaped mark is formed on the side surface of the blade to indicate that the amount of wear of the cutting blade has reached a predetermined amount and the blade replacement time has been reached, and the groove-shaped mark is used to determine wear on the side surface of the cutting blade. This is achieved by a cutting tool characterized by comprising a plurality of linear linear grooves that are parallel to each other.

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 arranged along an outer peripheral portion of the blade body, the cutting A groove-shaped mark is formed on the side surface of the blade to indicate that the amount of wear of the cutting blade has reached a predetermined amount and the blade replacement time has been reached, and the groove-shaped mark is used to determine wear on the side surface of the cutting blade. It is configured by a plurality of linear linear grooves that are parallel to each other, and one end of each linear groove is arranged at the same predetermined interval from the cutting edge of the cutting blade. This is achieved by a cutting tool characterized by being cut.

Claims (4)

A cutting tool for cutting a sheet material while rotating,
A fan-shaped blade body, and a cutting blade disposed along the outer periphery of the blade body,
On the side surface of the cutting blade, a groove mark is formed indicating that the amount of wear of the cutting blade has reached a predetermined amount and the time for blade replacement has been reached,
The groove-shaped mark is constituted by a plurality of linear linear grooves that are parallel to each other.   The cutting tool according to claim 1, wherein each of the linear grooves has a different groove depth.   3. The cutting tool according to claim 1, wherein one end portion of each linear groove is arranged at the same predetermined interval from the cutting edge of the cutting blade. 4.   The cutting blade is provided on each side edge in the thickness direction of the cutter body along the outer periphery of the cutter body, and the groove mark is formed on the outer side surface of each cutting blade. 4. The cutting tool for cutting according to any one of items 1 to 3.

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