JP2019171494A - Plastic tape cutter - Google Patents

Abstract

To provide a plastic tape cutter that is excellent in easiness of cutting, and can form a cut area having high linearity when cutting an adhesive tape.SOLUTION: The present invention is a plastic tape cutter including a cutting part including: a front surface; a rear surface; and a ridge line that is an intersection line of the front surface and the rear surface. In the ridge line, continuous projections having a serration shape are formed. A distance between vertices of adjacent projections formed in the cutting part is 0.5 mm or longer and 1.0 mm or shorter, an angle formed by vertices of the projections is 40° or larger and smaller than 85°, and an angle formed between the front surface and the rear surface is larger than 33° and 65° or small.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a plastic tape cutter capable of forming a cut with high linearity when cutting an adhesive tape.

  2. Description of the Related Art Conventionally, there is known a tape cutter that accommodates an adhesive tape wound in a roll shape, and cuts the accommodated adhesive tape after drawing it out to a predetermined length. In such a tape cutter, after the tape is drawn out over a predetermined length by rotating the adhesive tape wound in a roll shape, the tape is cut by a cutting blade installed at the outlet of the tape.

  In general, the cutting blade of a tape cutter is formed in a sawtooth shape. When using a tape cutter having such a serrated cutting blade, the adhesive tape is fed out to a desired length, and then fixed by positioning the adhesive tape on a stage or the like provided adjacent to the cutting blade. After that, the pressure-sensitive adhesive tape is cut in the width direction by pulling from one end portion in the width direction of the pressure-sensitive adhesive tape toward the tip portion of the serrated cutting blade while applying pressure from above. However, it is generally known that the adhesive tape cut with a conventional cutting blade has a cut edge formed in a sawtooth shape, and has a problem in appearance.

  As a tape cutter that has coped with these problems, for example, in Patent Document 1, a pad and a pedestal in which a mountain-shaped inclined edge is provided from both ends to the center, and a serrated blade is provided along the inclined edge. A tape cutter fixed between the two is disclosed. Further, Patent Document 2 discloses a cutting blade for a tape cutter configured by providing a plurality of unit blades each having an upper end corner, an edge, and a depressed portion at one end edge of a flat member. By cutting the adhesive tape using this cutting blade, the cut end can be formed in a substantially linear shape.

Japanese Patent Application Laid-Open No. 06-076687 JP 2010-030031 A

  However, although the cut of the adhesive tape formed by the tape cutter of Patent Document 1 has a tendency to tear to some extent in the longitudinal direction, serrated irregularities are still formed at the cut and are satisfactory in appearance. It was not a thing. Moreover, when the adhesive tape is cut using the cutting blade for the tape cutter of Patent Document 2, the cut end has very high linearity, but the invention of Patent Document 2 is mainly made of metal. It was aimed at the cutting blade. When the cutting blade is made of plastic, it is necessary to improve the linearity of the cut edge while maintaining ease of cutting.

  Accordingly, the present invention has been made in view of the above problems, and is a plastic tape cutter, which is excellent in ease of cutting and forms a cut having high linearity when the adhesive tape is cut. An object is to provide a possible tape cutter.

  The inventors of the present invention have conducted extensive research in view of the above problems. As a result, in a plastic tape cutter having a front surface, a back surface, and a ridge line that is an intersection of the front surface and the back surface, and a sawtooth-like continuous convex portion formed on the cutting portion formed on the ridge line, It is found that the above problems can be solved by adjusting the distance between the vertices of the convex portions, the angle of the angles formed by the vertices of the respective convex portions, and the angle of the angles formed by the front surface and the back surface, and completes the present invention. It came to. Specifically, the present invention provides the following.

  (1) A plastic tape having a cut portion, which has a front surface, a back surface, and a ridge line that is an intersection of the front surface and the back surface, and a sawtooth-like continuous convex portion is formed on the ridge line. It is a cutter, Comprising: The distance of the vertex of the adjacent convex part formed in the cutting part is 0.5 mm or more and 1.0 mm or less, and the angle which the vertex of each convex part makes is 40 degrees or more and less than 85 degrees A plastic tape cutter in which an angle formed by the front surface and the back surface is greater than 33 ° and equal to or less than 65 °.

  (2) The plastic tape cutter according to (1), which is a molded body of a thermoplastic resin.

  (3) The plastic tape cutter according to (2), which is a molded product of polymethyl methacrylate (PMMA), polystyrene (PS), polycarbonate (PC), or acrylonitrile-butadiene-styrene (ABS).

  (4) The plastic tape cutter according to any one of (1) to (3), wherein apexes of the sawtooth-shaped continuous convex portions are arranged in a substantially straight line shape.

  (5) Used for a cutting portion of a tape cutter, having a front surface, a back surface, and a ridge line that is an intersection of the front surface and the back surface, and a serrated continuous convex portion is formed on the shore line. The distance between the apexes of adjacent convex portions formed in the cut portion is 0.5 mm or more and 1.0 mm or less, and the angle formed by the apexes of the respective convex portions is 40 °. A cutting blade that is less than 85 ° and an angle formed by the front surface and the back surface is greater than 33 ° and not greater than 65 °.

  According to the tape cutter of the present invention, since the distance between the apexes of the adjacent convex portions of the cutting portion, the angle formed by the apexes of the respective convex portions, and the angle formed by the front and back surfaces of the cutting portion are adjusted, the cutting Although the part is made of plastic, the cut end has good linearity and the ease of cutting of the adhesive tape is also maintained well.

It is a perspective view which shows the use condition of the tape cutter of this invention. It is a perspective view of one division of the tape cutter of the present invention. It is the front view of one division of the tape cutter of this invention, and the enlarged view of a cutting blade. It is a side view of one division of the tape cutter of the present invention. It is drawing which shows the mode of the cut surface of the cut surface of the adhesive tape of an Example and a comparative example.

  Hereinafter, the present invention will be described in detail with reference to the drawings. In this specification, when the adhesive tape is attached to the tape cutter 1, the direction constituting the rotation axis side of the adhesive tape is referred to as the axial direction, indicated by X in the figure, orthogonal to the axial direction, and the adhesive tape. The direction in which the is fed is referred to as the feeding direction, indicated by Y in the figure, and the direction perpendicular to the axial direction and the feeding direction is referred to as the height direction, indicated by Z in the figure.

<Tape cutter>
FIG. 1 is a perspective view showing a usage state of the tape cutter 1 of the present invention, FIG. 2 is a perspective view of one segment 111 of the tape cutter 1 of the present invention, and FIG. 3 is a tape of the present invention. FIG. 4 is a front view of one segment 111 of the cutter 1 and an enlarged view of the cutting blade 21, and FIG. 4 is a side view of one segment 111 of the tape cutter 1 of the present invention. The tape cutter 1 of the present invention is made of a plastic molded product, and has an adhesive tape roll holding unit 3 and a cutting unit 2. And the cutting | disconnection part 2 has the stage part 22 for hold | maintaining an adhesive tape from an adhesive surface as needed while having the cutting blade 21. FIG. The tape cutter 1 of the present invention is preferably one that can be divided into two in parallel with the feeding direction. When the adhesive tape roll is attached to the tape cutter 1, the tape cutter 1 is divided into two parts and the divided adhesive is divided. The pressure-sensitive adhesive tape roll is fitted into the tape roll holding part 3, and the divided parts 11 of the tape cutter 1 are combined to fix the pressure-sensitive adhesive tape roll.

[Adhesive tape roll holder]
The tape cutter 1 of the present invention is not particularly limited and can be of any size capable of holding an adhesive tape roll of any diameter, but is relatively small because it is made of plastic. It is also preferred that For this reason, it is preferable that the pressure-sensitive adhesive tape roll holding unit 3 can hold a relatively small-diameter pressure-sensitive adhesive tape roll. More specifically, the adhesive tape roll holder 3 of the tape cutter 1 of the present invention is preferably capable of holding an adhesive tape roll having a diameter of 32 mm or greater and 45 mm or less.

  The adhesive tape roll holding part 3 is preferably formed by a cylindrical structure projecting from the wall part 31 of the two segments 11 of the tape cutter 1. When the two bodies 11 of the tape cutter 1 are combined, the cylindrical structure projecting from the wall 31 of one of the bodies 111 is projected from the wall 31 of the other body 112. It is preferable that the adhesive tape roll fitted in the cylindrical structure of the other split body 112 can be fitted by the wall portions of the two split bodies 11. Can be clamped and fixed.

[Cut part]
The cutting part 2 is fixed to a position protruding forward from the adhesive tape roll holding part 3 in the feeding direction, and preferably has a cutting blade 21 and a stage part 22.

(Cutting blade)
The cutting blade 21 has a surface 211 formed substantially forward in the feed-out direction, and a back surface 212 formed so as to maintain a certain angle with the surface 211, and an intersection line between the surface 211 and the back surface 212 is a ridge line. 213 is formed. The ridge line 213 is formed with a plurality of continuous sawtooth-shaped convex portions 214. The convex portions 214 are formed in a substantially triangular cross section, and when the adhesive tape is pressed against the ridge line 213, The plurality of protrusions 214 bite into the adhesive tape to form a plurality of break points, and the break points spread in the axial direction to cut the adhesive tape. In the present invention, it is preferable that the vertices of the sawtooth-shaped continuous convex portion 214 are arranged substantially linearly.

  In the present invention, the distance between the vertices of adjacent convex portions 214 on the ridge line 213 (B in FIG. 3) is 0.5 mm or more and 1.0 mm or less, and 0.6 mm or more and 0.8 mm or less. More preferred. Further, the angle formed by each vertex (C in FIG. 3) is 40 ° or more and less than 85 °, and more preferably 40 ° or more and 60 ° or less. In these parameters, the linearity of the cut edge and the ease of cutting of the adhesive tape are in a trade-off relationship. The higher the linearity of the cut edge, the lower the ease of cutting of the adhesive tape, and the easier it is to cut the adhesive tape. The higher the height, the lower the linearity of the cut. However, by making the distance between the apexes of adjacent convex portions 214 and the angle formed by each apex within the above range, the linearity of the cut and the cutting of the adhesive tape Ease is balanced and balanced. In addition, when the distance of the vertex of the adjacent convex part 214 on the ridgeline 213 becomes 0.4 mm or less, while the moldability of the tape cutter 1 deteriorates, the adhesive tape slips at the time of cutting, and the adhesive tape is cut. Can not do it.

  Furthermore, in the present invention, in the ridge line 213, the angle formed by the front surface 211 and the back surface 212 (D in FIG. 4) is greater than 33 ° and not greater than 65 °, and not less than 38 ° and not greater than 50 °. Is more preferable. By setting the angle formed by the front surface 211 and the back surface 212 to be within the above range, the straightness of the cut surface of the adhesive tape is maintained and the ease of cutting of the adhesive tape is improved.

(Stage part)
The stage portion 22 is formed so as to slightly protrude in the height direction from a line connecting the axis of the adhesive tape roll holding portion 3 and the ridge line 213 of the cutting blade 21, and after cutting the adhesive tape, By sticking the adhesive surface to the stage portion 22, the feeding end portion of the adhesive tape can be held. Thereby, after cut | disconnecting an adhesive tape, it can prevent effectively that an adhesive tape remove | deviates from the cutting blade 21. FIG.

[Dimensions of tape cutter]
The tape cutter 1 of the present invention preferably has an axial dimension (thickness) of 20 mm to 30 mm, and more preferably 23 mm to 28 mm. Further, the maximum dimension in the feeding direction is preferably 62 mm or more and 92 mm or less, and more preferably 70 mm or more and 85 mm or less. The maximum dimension in the height direction is preferably 40 mm or more and 60 mm or less, and more preferably 45 mm or more and 55 mm or less. The tape cutter 1 having such a dimension is lighter in weight than the adhesive force of the adhesive tape, and therefore when the adhesive tape is fed out from the adhesive tape roll, the tape cutter 1 is held with one hand, The adhesive tape is paid out with the other hand.

[Material]
The tape cutter 1 of the present invention is made of plastic, but is preferably a thermoplastic molded body, such as polymethyl methacrylate (PMMA), polystyrene (PS), polycarbonate (PC), or acrylonitrile butadiene. A molded product of styrene (ABS) is more preferable. Examples of polystyrene include general-purpose polystyrene (GPPS) and impact-resistant polystyrene (HIPS), but general-purpose polystyrene is preferred from the viewpoint of price and versatility. By molding the tape cutter 1 with these materials, the strength of the tape cutter 1 becomes sufficient and the ease of cutting becomes good.

  Hereinafter, the present invention will be described in detail with reference to examples. In addition, this invention is not limited to the Example shown below at all.

<Example 1>
Using a mold, a tape cutter, which is a general-purpose polystyrene (GPPS) molded body composed of two halves, was produced. The dimensions of the tape cutter are 77mm in the feeding direction, 25mm in the axial direction, 50mm in the height direction, 0.7mm in the distance between the vertices of adjacent protrusions, and the angle formed by the vertices of each protrusion. Was 45 °, and the angle between the front surface and the back surface was 38 °.

<Example 2>
In Example 1, a tape cutter was produced in the same manner as in Example 1 except that the angle formed by the apexes of the respective convex portions was changed from 45 ° to 40 °.

<Example 3>
In Example 1, the tape cutter was produced like Example 1 except the distance of the vertex of an adjacent convex part having been 0.7 mm to 0.6 mm.

<Example 4>
A tape cutter was produced in the same manner as in Example 1 except that the molded body composed of two halves was a polymethyl methacrylate (PMMA) molded body.

<Example 5>
A tape cutter was produced in the same manner as in Example 2 except that the molded body composed of the two halves was a polymethyl methacrylate (PMMA) molded body.

<Example 6>
A tape cutter was produced in the same manner as in Example 3 except that the molded body composed of two halves was a polymethyl methacrylate (PMMA) molded body.

<Comparative Example 1>
The tape cutter consisting of two halves is a general-purpose polystyrene (GPPS) molded body, the distance between the vertices of adjacent convex portions is 0.4 mm, the angle formed by the vertices of the respective convex portions is 60 °, and the front surface and the back surface are formed. A tape cutter was produced in the same manner as in Example 1 except that the angle was 45 °.

<Comparative example 2>
The tape cutter consisting of two halves is a general-purpose polystyrene (GPPS) molded body, the distance between the apexes of adjacent convex portions is 0.8 mm, the angle formed by the apexes of each convex portion is 85 °, and the front and back surfaces are made A tape cutter was produced in the same manner as in Example 1 except that the angle was 33 °.

<Comparative Example 3>
A tape cutter was produced in the same manner as in Comparative Example 2 except that a polymethyl methacrylate (PMMA) molded body was used as the tape cutter composed of two halves.

<Comparative Example 4>
The tape cutter consisting of two halves is a general-purpose polystyrene (GPPS) molded body, the distance between the apexes of adjacent convex parts is 1.3 mm, the angle formed by the apexes of each convex part is 60 °, and the front and back surfaces are made A tape cutter was produced in the same manner as in Example 1 except that the angle was 45 °.

<Evaluation>
[Cleavage by sensuality]
The tape cutters of Examples and Comparative Examples were compared with existing tape cutters, and whether they were easy to cut or difficult to cut was evaluated according to the following criteria.
○: easy to cut, Δ: somehow cut, Δ ×: difficult to cut, ×: not cut

[Cutability: Resistance value when cutting]
The tensile strength at the time of cutting at a speed of 1,000 mm / min at a twist angle of 30 ° was measured. The adhesive tape was cut 10 times, and the average value was taken as the measured value.

[Roughness]
The tape cut by the cutting test was magnified 50 times, and the amount of undulation on the cut surface was measured. The maximum value was taken as the measured value.

[Appearance of cut face]
The adhesive tape roll was cut with the tape cutters of Examples and Comparative Examples, and the cut end was photographed.

  The above results are shown in Table 1 and FIG.

  As can be seen from the examples and comparative examples, the tape cutter of Comparative Example 1 cannot be cut because the distance between the vertices of the convex portions is too small, and the existing tape cutter of Comparative Example 4 is an adhesive tape cut end. In contrast, the tape cutters of Examples 1 to 6 have both cutting performance and cutting edge linearity, and a cutting edge with good linearity is obtained. However, it became easy to cut.

DESCRIPTION OF SYMBOLS 1 Tape cutter 11 Split 111 One split 112 The other split 2 Cutting part 21 Cutting blade 211 Front surface 212 Back surface 213 Ridge line 214 Convex part 22 Stage part 3 Adhesive tape roll holding part 31 Wall part

Claims (5)

A plastic tape cutter having a cutting portion, having a front surface, a back surface, and a ridge line that is an intersection line of the front surface and the back surface, and a serrated continuous convex portion is formed on the ridge line. And
The distance between the vertices of adjacent convex portions formed in the cut portion is 0.5 mm or more and 1.0 mm or less,
The angle formed by the vertices of each convex portion is 40 ° or more and less than 85 °,
A plastic tape cutter, wherein an angle formed by the front surface and the back surface is greater than 33 ° and not greater than 65 °.   The plastic tape cutter according to claim 1, which is a molded body of a thermoplastic resin.   The plastic tape cutter according to claim 2, which is a molded body of polymethyl methacrylate (PMMA), polystyrene (PS), polycarbonate (PC), or acrylonitrile-butadiene-styrene (ABS).   The plastic tape cutter according to any one of claims 1 to 3, wherein apexes of the sawtooth-shaped continuous convex portions are arranged in a substantially straight line shape. It is used for the cutting part of a tape cutter, has a front surface, a back surface, and a ridge line that is an intersection line of the front surface and the back surface, and a serrated continuous convex portion is formed on the shore line. Cutting blades,
The distance between the vertices of adjacent convex portions formed in the cut portion is 0.5 mm or more and 1.0 mm or less,
The angle formed by the vertices of each convex portion is 40 ° or more and less than 85 °,
The cutting blade whose angle which the said surface and the said back surface make is more than 33 degrees and 65 degrees or less.