JP3210383U - Cutting tool for grooving tape - Google Patents

Abstract

The present invention provides a cutting tool for cutting a grooving tape, in which the cutting edge of the cutting edge into the grooving tape becomes good and the grooving tape can be cut sharply. A head portion 12 having a sharp shape toward the front is formed. A central scooping surface 17 extending in the front-rear direction is formed at the center of the head portion 12, and a pair of left and right cuts are formed on both left and right sides of the head portion 12. The blades 21 and 22 are formed in an inverted V-shaped arrangement such that the distance between the blades 21 and 22 decreases toward the front end side of the head portion 12, and the groove cutting tape is cut by the pair of left and right cutting blades 21 and 22. In the cutting tool for grooving tape, the rear end position P1 of the center scooping surface 17 is substantially the same position as the rear end position P2 of the pair of left and right cutting edges 21 and 22, or a position ahead of it. To do. [Selection] Figure 3

Description

  The present invention provides a groove for use in a punching machine that is mounted on a grooving tape cutter for cutting a grooving tape that has been used as a female mold material when creased on paperboard or cardboard. The present invention relates to a cutting tape cutting blade.

  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 grooving tape cutter not shown. 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, which can improve the bite of the cutting edge into the grooving tape and can cut the grooving tape sharply. It is for the purpose.

In order to achieve the above object, a cutting tool for grooving tape according to the present invention comprises:
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. It is formed in an inverted V-shaped arrangement such that the distance between each other becomes narrower as it goes to the front end side,
In the cutting tool for grooving tape cutting the grooving tape 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 located in front of it.

  In the present invention, a flank that is inclined upward toward the center line of the cutting tool for grooving tape is formed on the lower surface side of the head portion, and the flank is formed by forming the flank. It is preferable that a space capable of receiving the cut end portion is formed therein (second device).

  According to the cutting tool for grooving tape of the present invention, the rear end position of the center scooping surface corresponds to the length of the rear end position from the front 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 ahead of it, the length of the central scooping surface is not excessive as in the past, and the scooping angle of the center scooping surface is larger 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 second device, a flank that is inclined upward toward the center line of the cutting tool for grooving tape 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.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the grooving tape cutting machine with which the cutting tool for grooving tape cutting concerning one Embodiment of this invention is mounted | worn, (a) is a front view immediately after the start of cutting operation, (b) is the front immediately before the end of cutting operation FIG. It is a figure which shows the cutting tool for grooving tape cutting | disconnection of this embodiment, (a) is a whole perspective view, (b) is an AA line cutting part end view at the time of the grooving tape cutting | disconnection of (a). It is a figure which shows the head part of the cutter for the same groove cutting tape, (a) is a top view, (b) is a bottom view. (A) is cutting | disconnection operation | movement explanatory drawing of the grooving tape using the same cutting tool for grooving tape, (b) is explanatory drawing of the cutting | disconnection edge part of a grooving tape. It is a figure which shows the cutting tool for grooving tapes which concerns on the other example of this invention, (a) is a position where the rear end position of a center scoop surface is a front position rather than the rear end position of a right and left cutting blade, b) is a case where the center scoop surface is of a wide type. It is a figure which shows the conventional cutting tool for grooving tape, (a) is a whole perspective view, (b) is a XX line cutting part end elevation of (a), (c) is a bottom view of a head part. It is cutting operation explanatory drawing of the groove cutting tape using the conventional cutting tool for groove cutting tape.

  Next, a specific embodiment of a cutting tool for grooving tape according to the present invention will be described with reference to the drawings. In the following, a grooving tape cutting blade used by being mounted on a manual grooving tape cutter will be described.

<Description of grooving tape cutter>
In the grooving tape cutting machine 1 shown in FIG. 1, after the grooving tape 2 is placed on the receiving base 3 for positioning, the operation lever 4 is lowered to push down the locking force adding member 5. The grooving tape 2 is locked and fixed, and a pair of grooving tape cutting tools (hereinafter simply referred to as “blades”) by the driving means 6 that operates in conjunction with the locking force applying member 5. 10 is driven to move forward from the diagonally upward toward the grooving tape 2, and the grooving tape 2 is cut into a predetermined acute angle shape with a pair of blades 10, and at the same time, chamfering of both edges thereof can be performed. Has been.

  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 formed 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 side scooping surface 15 and the right side 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. 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 to the conventional blade 101 in which the rear end position (P ₁₀₁ ) of the surface 103 is far behind the rear end positions (P ₁₀₂ ) of the pair of left and right cutting edges 104 and 105, the connecting pin is inserted. Since the length of the portion between the hole 13 and the center scooping surface 17 is increased, thereby enhancing the durability of this portion, even if the blade 10 is repeatedly driven forward, the portion is cracked, broken, 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-described embodiment, and as appropriate without departing from the spirit thereof. 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 grooving tape of the present invention has a characteristic that the cutting edge of the cutting edge into the grooving tape is good 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. It is formed in an inverted V-shaped arrangement such that the distance between each other becomes narrower as it goes to the front end side,
In the cutting tool for grooving tape cutting the grooving tape with the pair of left and right cutting blades,
A cutting tool for cutting a grooving tape, characterized in that a rear end position of the center 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.

Images