JP5752314B1 - Cutting tool - Google Patents

Abstract

There is provided a cutting tool capable of accurately recognizing the life of a cutting tool for cutting a sheet material such as a corrugated cardboard sheet, that is, the time for replacing the cutting tool.
A cutting tool for cutting a sheet material while rotating, comprising a fan-shaped blade body and a cutting blade disposed along an outer peripheral portion of the blade body, and a side surface of the cutting blade. And a cutting tool with a groove mark indicating that the amount of wear of the cutting blade has reached a predetermined amount and the time for blade replacement has been reached.
[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 50 as shown in FIG. 11 is known. 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. 12 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. 13 is a side view showing a schematic configuration of the grooving device, and FIG. 14 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. 13, with the upper rotating holders 73 and 73 and the lower rotating holders 74 and 74 rotated, the corrugated cardboard sheet 50 is moved along the sheet feeding line L of the grooving device 70 as shown in FIG. 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. 11 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

  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 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 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 extends along the circumferential direction of the blade body. This is achieved by a cutting tool characterized by comprising a plurality of linear grooves extending .

In addition, concerning the cutting machining tool, prior Symbol each line-shaped groove may be configured to have different groove depths, respectively.

  The linear grooves may be formed to extend in the length direction of the cutting edge with the same predetermined interval between the cutting edge and the cutting edge.

  Each linear groove is formed at a predetermined interval along the radial direction of the blade body, and is formed so that the groove depth becomes smaller toward the inside in the radial direction of the blade body. You may comprise as follows.

Further, 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 disposed along the outer periphery of the blade body, A groove-shaped mark is formed on the side surface of the cutting 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 formed from the cutting edge side of the cutting blade. It is comprised by the linear groove | channel extended toward the radial inside of the said cutter main body, The tangential direction with respect to the said linear groove in the arbitrary points on the said linear groove, and the diameter of the said cutter main body which passes the said arbitrary points An angle formed by a virtual line direction parallel to the direction is achieved by a cutting tool characterized in that the arbitrary point becomes smaller as it goes radially inward of the blade body.

Further, 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 disposed along the outer periphery of the blade body, A groove-shaped mark is formed on the side surface of the cutting 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 formed from the cutting edge side of the cutting blade. said is constituted by a pair of linear grooves extending toward the radial inside of the tool body, each line-shaped groove is toward the radially inner side of the tool body, characterized in that the distance between each other is reduced This is achieved by a cutting tool.

  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 top view which shows a part of modification of the cutting tool for cutting shown in FIG. It is a top view which shows a part of modification of the cutting tool for cutting shown in FIG. It is a top view which shows a part of modification of the cutting tool for cutting shown in FIG. It is a principal part enlarged view of FIG. It is a top view which shows a part of modification of the cutting tool for cutting shown in FIG. It is a top view which shows a part of modification 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 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 with which the cutting tool shown in FIG. 14 was attached. It is a front view which shows schematic structure of the grooving apparatus to which the cutting tool shown in FIG. 14 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 mark 5 shown in FIG. 1 is configured as a set of a plurality of linear grooves 51 extending along the circumferential direction of the blade body 2. Each linear groove 51 is formed to extend in the length direction of the cutting edge 31 with the same predetermined interval between the cutting edge 3 and the cutting edge 31 (along a line substantially parallel to the cutting edge 31). Are arranged at predetermined intervals). 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 51. 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. 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. 13 and 14 , 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.

  Further, in the present embodiment, as shown in FIG. 1, the groove mark 5 is configured as a set of a plurality of linear grooves 51 extending along the circumferential direction of the blade body 2. When the groove-shaped mark 5 is configured to include a plurality of linear grooves 51 in this way, for example, at the timing when one linear groove 51 disappears due to wear thinning of the side surface of the cutting blade 3, It becomes possible to notify the user that the blade 1 is about to be replaced, and the user should prepare a new cutting tool 1 (stock check and product ordering procedure). It is possible to call attention. Then, it is possible to alert the user that it is necessary to replace the cutting blade 1 at a timing when the other linear grooves 51 are almost disappeared or when they are completely disappeared.

  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 two linear grooves 51, and each linear groove 51 is between the cutting edge 31 of the cutting blade 3. It is formed so as to extend in the length direction of the blade edge 31 with the same predetermined interval, and further, each linear groove 51 is configured to be adjacently disposed with a predetermined interval. It is not specifically limited to. For example, as shown in FIG. 4, the linear grooves 51 may be formed at predetermined intervals along the radial direction of the blade body 2. The groove mark 5 shown in FIG. 4 is configured such that virtual lines L1 and L2 that pass through end portions on the same direction side of the linear grooves 51 are substantially parallel to the radial direction of the blade body 2. . In addition, as shown in FIG. 5, it has comprised so that the virtual lines L3 and L4 which pass through each edge part of the same direction side of each linear groove | channel 51 may make a predetermined angle with respect to the radial direction of the cutter main body 2. As shown in FIG. Also good. Further, each linear groove 51 may be formed so that the groove depth becomes smaller or the groove depth becomes larger as it goes radially inward of the blade body 2.

  Moreover, in the said embodiment, although the groove-shaped mark 5 is comprised as an aggregate | assembly of the some linear groove | channel 51 extended along the circumferential direction of the blade body 2, for example, along the circumferential direction of the blade body 2 The groove-shaped mark 5 may be constituted by a single linear groove 51 extending.

  Further, the groove mark 5 in the above embodiment is configured to include a plurality of linear grooves 51, and the linear grooves 51 are configured to extend along the circumferential direction of the blade body 2. However, for example, as shown in FIG. 6 and FIG. 7 which is an enlarged view of a main part of FIG. 6, a line extending the groove mark 5 from the cutting edge 31 side of the cutting blade 3 toward the radially inner side of the blade body 2. A virtual tangent L5 (tangential direction) with respect to the linear groove 51 at an arbitrary point on the linear groove 51, and an imaginary line L6 passing through the arbitrary point and parallel to the radial direction of the blade body 2 You may comprise so that the angle which (virtual line direction) makes becomes small as arbitrary points go to the radial direction inner side of the cutter main body 2. FIG. Normally, the wear on the side surface of the cutting blade 3 proceeds from the cutting edge 31 side of the cutting blade 3, and the amount of wear increases rapidly with time. In the linear groove 51 that has disappeared due to wear, a virtual tangent L5 to the linear groove 51 at the end point on the cutting edge 31 side of the linear groove 51, and a virtual line L6 that passes through the end point and is parallel to the radial direction of the blade body 2 Based on the magnitude of the angle, the user can intuitively make the user think about whether or not the time when the wear increases rapidly.

  Further, as shown in FIGS. 8 and 9, the groove mark 5 is constituted by a pair of linear grooves 51 extending from the cutting edge 31 side of the cutting blade 3 toward the radially inner side of the cutter body 2. The groove 51 may be configured such that the distance from each other decreases as it goes inward in the radial direction of the blade body 2. Even in such a configuration, in the process where the linear mark disappears from the cutting edge 31 side of the cutting blade 3 due to wear, by monitoring the separation distance between the pair of linear grooves 51, intuitively, It is possible to make the user think about whether or not the time when the wear increases rapidly.

  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. 10 so that the sheet material can be simply cut and separated. Good. When the cutting tool 1 is configured by providing the single cutting blade 3 in this way, a recess that connects the cut-out body 5 to the cut-out portion 5 on one side surface that is in sliding contact with the receiving blade 75. 6 is formed.

DESCRIPTION OF SYMBOLS 1 Cutting tool 2 Cutting body 3 Cutting blade 31 Cutting edge 4 Cutting generation blade 5 Notch 6 Recess 50 Sheet material 70 Grooving device 75 Receiving blade

Claims (7)

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 grooves extending along a circumferential direction of the blade body . The cutting tool according to claim 1 , wherein each of the linear grooves has a different groove depth. Wherein each line-shaped groove, the at a same predetermined distance between the cutting edge of the cutting blade, the cutting according to claim 1 or 2, characterized in that it is formed to extend in a longitudinal direction of the cutting edge Cutting tool for processing. Each of the linear grooves is formed at a predetermined interval along the radial direction of the blade body, and is formed such that the groove depth becomes smaller toward the inner side in the radial direction of the blade body. Item 3. A cutting tool according to Item 1 or 2 . 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 mark is constituted by a linear groove extending from the cutting edge side of the cutting blade toward the radially inner side of the blade body,
An angle formed between a tangential direction with respect to the linear groove at an arbitrary point on the linear groove and an imaginary line direction passing through the arbitrary point and parallel to the radial direction of the blade body is the arbitrary point. disconnect processing tool characterized by decreases toward the radially inner side of the body. 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 mark is composed of a pair of linear grooves extending from the cutting edge side of the cutting blade toward the radial inner side of the cutter body,
Each line-shaped groove is toward the radially inner side of the cutting tool body, disconnect processing tool, characterized in that the distance between each other is reduced. 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. The cutting tool for cutting according to any one of 1 to 6 .

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