JP2018153917A - Groove-cutting tape cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a groove-cutting tape cutter capable of sharply cutting a groove cutting tape by its blade edge cutting into groove cutting tape well.SOLUTION: A groove-cutting tape cutter 10 comprises a sharp head part 12 forward, and a central copying surface 17 formed in the center of the head part 12 so as to extend in the longitudinal direction. A pair of left and right cutting edges 21 and 22 are formed on the left and right sides of the head part 12 in a reverse V-shaped arrangement such that the interval between them narrows as they advance to the front end side of the head part 12, so that a groove cutting tape 2 is cut by the pair of left and right cutting edges 21 and 22. A rear end position (P) of the central copying surface 17 lies at the substantially same position as a rear end position (P) of the pair of left and right cutting edges 21 and 22 or lie at a position in front of it.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a groove used by attaching to a grooving tape cutter for slicing a grooving tape used as a female mold material when cutting a paper board, cardboard or the like in a punching process. The present invention relates to a cutting tool for cutting tape.

  As shown in FIGS. 6A to 6C, this type of conventional grooving tape cutting blade (hereinafter simply referred to as “blade”) 101 has the same acute angle as the processed end of the grooving tape. The head portion 102 has a sharp shape toward the front so as to form θ (see FIG. 6C). A central scooping surface 103 is formed on the central upper surface of the head portion 102 so as to extend in the front-rear direction, and a pair of left and right cutting edges 104 and 105 (cutlery angle β: FIG. 6B) is provided on the left and right sides of the head portion 102. Is formed in an inverted V-shaped arrangement such that the interval between the head portions 102 becomes narrower as it goes to the front end side of the head portion 102 (see Patent Document 1). 6 (a) and 6 (c), reference numeral 106 denotes a connecting pin insertion hole. The connecting pin insertion hole 106 is used for driving in the driving means of a not-shown grooving tape cutter. The connecting pin implanted in the cam is inserted, the power from the cam is transmitted to the blade 101 through the connecting pin, and the blade 101 is driven forward.

Japanese Patent No. 4234785

  As shown in FIG. 7, the cutting of the grooving tape 107 using the blade 101 is performed by moving the blade 101 forward from the oblique direction toward the grooving tape 107 so that the left and right cutting blades 104 and 105 in the head portion 102 are grooved. This is done by being pushed into the cutting tape 107. At this time, in the grooving tape 107, the part in contact with the central scooping surface 103 becomes the chip 107a, and the opposite part becomes the product 107b.

  In the cutting operation shown in FIG. 7, the cutting edge 104 or 105 can be pressed more strongly against the product 107 b side by the center scooping surface 103 taking a reaction force on the chips 107 a, and the groove cutting tape 107 can be pressed. The bite of the blade becomes better.

By the way, as shown in FIG. 6A, in the cutter 101 according to Patent Document 1, the maximum cutting amount with respect to the grooving tape 107 is defined by the length from the front end position to the rear end position of the cutting blades 104 and 105. Although the cutting blades 104 and 105 cannot cut the grooving tape 107 beyond its length, the rear end position of the center scooping surface 103 (the position indicated by the symbol P ₁₀₁ in FIG. 6A) is , it provided the rear end position of the pair of left and right cutting edges 104 and 105 to (FIGS. 6 (a) position indicated by the middle symbol _{P 102)} to well beyond the rearward position, is the length of the central rake face 103 is excessive ing. For this reason, as shown in FIG. 7, the creased angle α ₁₀₁ of the center scooping surface 103 becomes extremely large, the chip 107 a becomes thin, and the center scooping surface 103 is cut during the cutting operation of the grooving tape 107. A sufficient reaction force cannot be taken against the chips 107a. Therefore, the conventional blade 101 has a problem that the cutting edge bites into the grooving tape 107 is poor, and the grooving tape 107 cannot be cut sharply, resulting in poor cutting.

  The present invention has been made in view of the above-described problems, and provides a cutting tool for cutting a grooving tape that can cut the grooving tape sharply by improving the bite of the cutting edge into the grooving tape. Objective.

The characteristic configuration of the cutting tool for grooving tape according to the present invention for solving the above problems is as follows:
A head portion having a sharp shape toward the front is formed, a central scooping surface extending in the front-rear direction is formed at the center of the head portion, and a pair of left and right cutting edges on the left and right sides of the head portion. In a cutting tool for grooving tape, which is formed in an inverted V-shaped arrangement such that the distance between each other becomes narrower toward the front end side, and the grooving tape is cut with the pair of left and right cutting blades,
The rear end position of the center scooping surface is substantially the same position as the rear end position of the pair of left and right cutting edges, or is in a position ahead of it.

  According to the cutting tool for grooving tape of this configuration, the rear end position of the center scooping surface is a pair of left and right according to the length from the front end position to the rear end position of the cutting blade that defines the maximum cutting amount with respect to the grooving tape. Since it is at the same position as the rear end position of the cutting edge, or at a position in front of it, the length of the central scooping surface is not excessive as in the past, and the scooping angle of the central scooping surface is higher than before. And the chip becomes thick, and the center scooping surface can take a sufficient reaction force against the chip during the cutting operation of the grooving tape. Therefore, the cutting edge bites into the grooving tape and the grooving tape can be cut sharply.

In the cutting tool for grooving tape according to the present invention,
On the lower surface side of the head portion, a flank that is inclined upward toward the center line of the cutting tool for cutting the grooving tape is formed, and the cutting end of the grooving tape is formed by forming the flank. It is preferable that an acceptable space is formed inside.

  According to the grooving tape cutting blade of this configuration, the flank face that is inclined upward toward the center line of the grooving tape cutting blade is formed on the lower surface side of the head portion. Thereby, the knife angle of each cutting edge becomes sharper, and the grooving tape can be cut more sharply. Moreover, the space which can receive the cutting | disconnection edge part of a grooving tape inside is formed by the said flank being formed. Thereby, it can prevent reliably that a head part interferes with the cutting | disconnection edge part of a groove cutting tape, and the cutting operation of a groove cutting tape can be performed more smoothly.

1A and 1B are diagrams showing a grooving tape cutter equipped with a cutting tool for grooving tape according to an embodiment of the present invention. FIG. 1A is a front view immediately after the start of a cutting operation, and FIG. It is a front view just before the end. FIG. 2: is a figure which shows the cutter for cutting the groove cutting tape, (a) is a whole perspective view, (b) is an AA line cutting part end view at the time of the groove cutting tape cutting of (a). FIGS. 3A and 3B are diagrams showing a head portion of the cutting tool for grooving tape, where FIG. 3A is a plan view and FIG. 3B is a bottom view. FIG. 4A is an explanatory view of the cutting operation of the grooving tape using the grooving tape cutting blade, and FIG. 4B is an explanatory view of the cut end portion of the grooving tape. FIG. 5 is a diagram showing a cutting tool for cutting a grooving tape according to another embodiment of the present invention. FIG. 5A shows the rear end position of the center scooping surface at a position ahead of the rear end positions of the left and right cutting edges. In some cases, (b) is a case where the center scoop surface is of a wide type. 6A and 6B are diagrams showing a conventional cutting tool for grooving tape, in which FIG. 6A is an overall perspective view, FIG. 6B is an end view of a cutting section taken along line XX of FIG. 6A, and FIG. FIG. FIG. 7 is an explanatory view of a cutting operation of a grooving tape using a conventional cutting tool for grooving tape.

  Hereinafter, an embodiment relating to a cutting tool for grooving tape according to the present invention will be described with reference to FIGS. In the following, a grooving tape cutting blade used by being mounted on a manual grooving tape cutter will be described. However, the present invention is not intended to be limited to the configurations described in the embodiments and drawings described below.

<Description of grooving tape cutter>
In the grooving tape cutter 1 shown in FIGS. 1 (a) and 1 (b), after the grooving tape 2 is placed on the receiving base 3 for positioning, the operation lever 4 is lowered to perform engagement. The stopping force adding member 5 is pushed down to lock and fix the grooving tape 2, and a pair of grooving tape cutting blades (hereinafter simply referred to as “cutting tape”) by the driving means 6 that operates in conjunction with the locking force adding member 5. Abbreviated as “cutlery”.) 10 is driven so as to advance toward the grooving tape 2 from obliquely above, and the pair of knives 10 cut the grooving tape 2 into a predetermined acute angle shape and simultaneously chamfered both edges thereof. It can be processed.

  As shown in FIG. 2A, the blade 10 has a main body portion 11 having a quadrangular cross section and extending in the front-rear direction, and a head portion 12 integrally connected to the front side of the main body portion 11. Yes. Here, a connecting pin insertion hole 13 is formed in the front portion of the main body 11, and the driving means 6 shown in FIGS. 1A and 1B is provided in the connecting pin insertion hole 13. The connecting pin 8 implanted in the driving cam 7 is inserted, the power from the cam 7 is transmitted to the blade 10 through the connecting pin 8, and the blade 10 is driven forward.

  As shown in FIGS. 3A and 3B, the head portion 12 has a sharp shape toward the front so as to form the same acute angle θ as the processed end of the grooving tape 2 (see FIG. 4B). Is formed. In the head portion 12, a left scooping surface 15 that is inclined diagonally to the left downward toward the front is formed at the corner of the intersection between the upper surface and the left side, and at the corner of the intersection between the upper surface and the right side, A right side scooping surface 16 that is inclined obliquely rightward and downward toward the front is formed, and a center scooping surface 17 that is inclined downward toward the front is elongated in the front-rear direction between the left scooping surface 15 and the right scooping surface 16 It is formed to extend. Further, on the lower surface side of the head portion 12, a flank 18 that is inclined upward toward the center line S of the blade 10 is formed. In the present embodiment, by forming the flank 18, a space 20 that can receive a cut end portion of the grooving tape 2 (a product 2 b to be described later) is formed in the head portion 12.

  In the head portion 12, the left scooping surface 15 and the flank 18 intersect to form a left cutting edge 21, and the right scooping surface 16 and the flank 18 intersect to form a right cutting edge 22. 21 and the right cutting edge 22 are arranged in an inverted V shape such that the distance between them becomes narrower toward the front end side of the head portion 12.

The center scooping surface 17 is located at a position spaced apart from the front side 25 connecting the front ends of the left and right cutting edges 21 and 22 with a predetermined distance behind the front side 25 and is longer than the front side 25. It consists of a trapezoidal flat surface having a side portion 26, a left oblique side portion 27 and a right oblique side portion 28 that connect the front side portion 25 and the rear side portion 26, and the rear end position of this central scoop surface 17, that is, the rear side The position (P ₁ ) of the portion 26 is substantially the same as the rear end position (P ₂ ) of the pair of left and right cutting edges 21 and 22, and is sandwiched between the left cutting edge 21 and the right cutting edge 22 in the head portion 12. The center scooping surface 17 is provided so as to be within the range of the area to be covered.

  The cutting of the grooving tape 2 using the blade 10 configured as described above is performed by moving the blade 10 forward from the oblique direction toward the grooving tape 2 as shown in FIG. This is done by pushing the left and right cutting edges 21 and 22 into the cutting tape 2. At this time, in the grooving tape 2, the portion on the side in contact with the center scooping surface 17 becomes the chips 2a, and the opposite portion becomes the product 2b. As shown in FIG. 4 (b), in the product 2b, the right and left sides of the end portion are cut obliquely with a groove 30 that engages with a ruled line pressing blade (not shown) as a sharp shape, Both edge portions 31, 31 are chamfered.

In the cutter 10 of this embodiment, as shown in FIG. 3A, the center of the cutting blades 21 and 22 defining the maximum cutting amount with respect to the grooving tape 2 is adjusted to the length from the front end position to the rear end position. The rear end position (P ₁ ) of the scooping surface 17 is substantially the same position as the rear end positions (P ₂ ) of the pair of left and right cutting edges 21 and 22. Therefore, the length of a conventional central rake face as it does not become excessive, the central rake angle alpha ₁ of the rake face 17 becomes smaller than the conventional (see FIG. 7), the chip 2a is turned thick During the cutting operation of the grooving tape 2, the center scooping surface 17 can take a sufficient reaction force against the chips 2a. Therefore, the cutting edge bites into the grooving tape 2 and the grooving tape 2 can be cut sharply.

Furthermore, the tool 10 of the present embodiment, while reducing the rake angle alpha ₁ of the central rake face 17 than the prior art, as shown in FIG. 2 (b), upward toward the center line S of the tool 10 The inclination of the inclined flank 18 is increased. Accordingly, the cutting edge coefficient of the pair of left and right cutting edges 21 and 22 can be made sharper and the grooving tape 2 can be cut more sharply while increasing the cutting edge section modulus and ensuring the cutting edge strength. Can do. Moreover, by providing the space 20 in the head part 12, it can prevent reliably that the head part 12 interferes with the cutting | disconnection edge part of the product 2b, and the cutting operation of the grooving tape 2 can be performed more smoothly. .

As described above, the blade 10 is driven forward by power transmitted from the cam 7 via the connecting pin 8 inserted into the connecting pin insertion hole 13. The load of the transmitted power is concentrated on the portion between 13 and the central scooping surface 17. In the cutter 10 of the present embodiment, the rear end position (P ₁ ) of the center scoop surface 17 is substantially the same as the rear end positions (P ₂ ) of the pair of left and right cutting edges 21 and 22. Compared with the conventional blade 101 in which the rear end position (P ₁₀₁ ) of the surface 103 is a rear position far beyond the rear end positions (P ₁₀₂ ) of the pair of left and right cutting edges 104, 105, the connecting pin difference Since the length of the portion between the insertion hole 13 and the center scooping surface 17 is increased, thereby improving the durability of this portion, even if the blade 10 is repeatedly driven forward, the portion is cracked or chipped. Etc. can be prevented in advance.

  As described above, the cutting tool for grooving tape of the present invention has been described based on one embodiment, but the present invention is not limited to the configuration described in the above embodiment, and is appropriately selected within the scope of the invention. The configuration can be changed.

In the above embodiment, the rear end position of the central rake face 17 (P ₁₎ is, but substantially shows an embodiment example in the same position as the rear end position of the pair of right and left cutting edges 21, 22 (P _2), The rear end position (P ₁ ) of the center scooping surface 17 is not limited to this, and the rear end positions (P ₂ ) of the pair of left and right cutting edges 21 and 22 are shown in FIG. 5A. There is also an example in which the position is further forward than that, and basically exhibits the same operational effects.

  In said embodiment, although the example of the cutter suitable for the cutting | disconnection of the grooving tape 2 with the comparatively narrow width | variety of the groove | channel 30 dug into the grooving tape 2 was shown, For cutting the grooving tape 2 when the width of the groove 30 is wide, a blade as shown in FIG. 5B is preferably used, and the center scooping surface according to the width of the groove 30 of the grooving tape 2 A blade having an appropriate width of 17 is appropriately used.

  The cutting tool for cutting a grooving tape of the present invention has a characteristic that the cutting edge of the grooving tape is better bitten and the grooving tape can be cut sharply. It can be suitably used for an application in which a chamfering process is performed on both edge portions of the groove cutting tape while it is mounted on a tape cutter and cut into a predetermined acute angle shape, and the industrial applicability is great.

DESCRIPTION OF SYMBOLS 1 Grooving tape cutting machine 10 Cutting tool for grooving tape 12 Head part 17 Center scoop surface 21,22 Cutting blade

Claims (2)

A head portion having a sharp shape toward the front is formed, a central scooping surface extending in the front-rear direction is formed at the center of the head portion, and a pair of left and right cutting edges on the left and right sides of the head portion. In a cutting tool for grooving tape, which is formed in an inverted V-shaped arrangement such that the distance between each other becomes narrower toward the front end side, and the grooving tape is cut with the pair of left and right cutting blades,
A cutting tool for cutting a grooving tape, wherein a rear end position of the central scooping surface is substantially the same position as a rear end position of the pair of left and right cutting edges or a front position thereof.   On the lower surface side of the head portion, a flank that is inclined upward toward the center line of the cutting tool for cutting the grooving tape is formed, and the cutting end of the grooving tape is formed by forming the flank. The cutting tool for cutting a grooving tape according to claim 1, wherein an acceptable space is formed inside.

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