JP2003231084A - Cutter edge and cutting device having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutter edge hardly leaving residue of a base material and adhesive on the cutter edge when cutting an adhesive tape and capable of peeling the whole surface at high workability by preventing partial hardness of peeling when the stuck adhesive tape is peeled, and to provide a cutting device having the same. <P>SOLUTION: This cutter edge is provided with two or less projecting parts and cuts the adhesive tape 2. This cutter edge is provided with a vertical angle Θof the projecting part 3a of 160° or less. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter blade and a cutting device having the same, and more particularly to a cutter blade for cutting an adhesive tape and a cutting device having the same.

[0002]

2. Description of the Related Art Adhesive tapes coated with an adhesive on the back are
Due to its high convenience, it is very often used for various industries and consumer products. The specifications also include various paper boxes, resin boxes, metal boxes, etc., resin bags, cloth bags, etc., or the product itself, directly or indirectly sealing or binding the opening, There are a wide variety of applications, such as displaying product specifications, insulating and sealing electrical parts and equipment, and even sticking it to the human body for medical purposes.

Such an adhesive tape is made of resin,
There are those using various base materials such as paper and cloth, and usually,
It is sold and used as a roll wound on a core material. Then, such a roll-shaped adhesive tape is used as it is, or is attached to a predetermined device or device (tape dispenser, etc.) for use. Cut with a cutter and prepare the rest for the next use.

[0004]

However, in the tape cutter of the prior art, the cutter blade is generally formed in a so-called jagged shape having a continuous uneven shape, and when cutting, a convex portion or a concave shape of the cutter blade is used. The base material and the adhesive are likely to remain on the part. When such residual slag is accumulated, the cutting edge of the cutter blade becomes less sharp, and the cutting surface becomes non-linear, or troubles such as failing in reliable cutting occur.
Moreover, since the cutting part has a continuous mountain-valley shape,
If you try to remove the adhesive tape that has been pasted,
There is also a problem that it is difficult to peel off all of the adhesive tape because it tears from one of the piles and peels off only partially or causes vertical tearing.

In view of the problems of the prior art, the inventors of the present invention have conducted intensive studies and studies, and as a result, by using a cutter blade capable of forming a cutting start point at a predetermined position in the width direction of the adhesive tape, The present invention has been completed by finding that the problems it has can be effectively reduced, that the entire surface of the adhesive tape can be easily and smoothly cut, and that the operation of peeling the adhered adhesive tape becomes easy.

That is, the object of the present invention is to solve the problems of the above-mentioned prior art by making it difficult for residues of the base material and the adhesive to remain on the cutter blade when the adhesive tape is cut, and the adhesive applied It is an object of the present invention to provide a cutter blade capable of peeling the entire surface with good workability and a cutting device provided with the cutter blade because it is difficult to peel the tape partially when peeling the tape.

[0007]

The above objects can be achieved by the inventions described in the claims. That is, the characteristic configuration of the cutter blade according to the present invention is to cut an adhesive tape having two or less convex portions, and the apex angle of the convex portions is 16
It is 0 ° or less.

According to this structure, when the cutting surface of the adhesive tape is brought into contact with the blade and tension is applied, the cutting proceeds easily and smoothly from the through hole formed by the convex portion, and therefore the cutter. Residues of the base material and the adhesive are less likely to remain near the blade edge of the blade, and the cut surface is smooth to reduce unevenness, and the entire adhesive tape is easily peeled off at the time of peeling. If the convex portion is formed over two peaks, the number of starting points for cutting increases and it becomes difficult for the cutting to proceed smoothly.
It is not preferable because the cut surface becomes a mountain-valley shape and it is difficult to peel off smoothly. Also, when the apex angle of the convex portion exceeds 160 °,
The convex portion makes it difficult to form a starting point for cutting, and it becomes difficult to reliably and smoothly cut the adhesive tape from the convex portion serving as a starting point for cutting, which is not preferable. The lower limit of the apex angle of the convex portion is preferably 45 ° or more. The adhesive tape to which the present invention can be applied is not particularly limited in terms of material, but P
It is particularly effective when cutting an adhesive tape using a resin-based base material such as ET and OPP.

It is preferable that the tip of the convex portion is located within 40% from the end portion side in the width direction.

According to this structure, it is convenient that the cutting proceeds more smoothly from the cutting start point of the adhesive tape formed by the tip of the convex portion, and a smooth cut surface is formed. Also when peeling off, it is convenient because vertical tearing can be more effectively avoided. When the tip of the convex portion is formed to exceed 40% from the end portion side in the width direction,
That is, if it is formed near the center of the cutter blade, the starting point of cutting is formed, but the tension applied to the adhesive tape is dispersed to the left and right, and the smoothness of cutting progress is diminished and it becomes difficult to proceed, which is not preferable. Therefore, when two convex portions are formed, 40% each from the widthwise ends of the cutter blade.
It is preferable to be formed within the position. More preferably, the tip of the convex portion is located within 20% from the end portion side in the width direction. Since the interval between the convex portions is increased, the starting point of cutting is easily formed, and the tension acting on the adhesive tape acts more effectively, which is convenient.

The characteristic structure of the cutting device according to the present invention is as follows.
A cutter blade according to claim 1 or 2 is provided.

According to this structure, when the adhesive tape is cut, it is difficult for residues of the base material and the adhesive to remain on the cutter blade, and when the adhered adhesive tape is to be peeled off, the adhesive tape is partially peeled off. Since it is difficult, it was possible to provide a cutting device capable of peeling the entire surface with good workability. The cutting device to which the present invention is applied is not limited to the name as long as it is a device having a function of cutting various adhesive tapes.
A table-top tape dispenser that uses cellophane tape wound around a paper roll core, and sequentially unwinds the cellophane tape when using it. Sealer, handy type cutter that cuts adhesive tape used for packaging such as cardboard boxes to a specified length, printing tape sticking machine that automatically sticks printed adhesive tape, and other cutters for cutting adhesive tape A cutting device mounted on various industrial and consumer devices having a cutting function having a blade is included.

It is preferable that the cutting device has a mounting portion for mounting the adhesive tape wound around the core material.

According to this structure, it is suitable for continuous use, and is more convenient and convenient.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows one type of cutting device in which a cellophane tape 2 which is one type of adhesive tape wound around a paper core material 1 is provided in a mounting portion 4 and a cutter blade 3 of this embodiment is mounted. Hand cutter A (HC-5
0. Product name. The entire structure of Nitto Denko Corporation is shown. The shape of the cutting edge of the cutter blade 3 attached to the hand cutter A is shown in FIG.

When using this hand cutter A, the cellophane tape 2 is placed along the inside of the small diameter guide roll 5.
Of the cellophane tape 2 is affixed to the affixed portion on the surface of the paper box by abutting the tip of the cellophane tape 2, and the hand cutter A is directly attached to the affixed portion. When the cellophane tape is moved, the cellophane tape is sequentially fed out from the paper core material 1, and the cellophane tape having a predetermined length is attached to the attachment site.

When the cellophane tape 2 is attached,
When the hand cutter A is started up and the large-diameter guide roller 6 is brought into contact with the non-adhesive surface side of the cellophane tape 2, when the hand cutter A is further started up, the cellophane tape 2 comes into contact with the cutter blade 3. The cellophane tape 2 has a starting point for cutting and a tension acts on the cellophane tape 2 to be smoothly cut.

Since the cutter blade 3 has the shape shown in FIG. 2, the cellophane tape 2 was cut very smoothly and the cut surface was also smooth. Further, even when the cellophane tape 2 that was once attached was peeled off, vertical cracks and the like did not occur.

[0019]

EXAMPLES Examples will be further described below, but the present invention is not limited to these examples.

2 to 5 show the shapes of cutter blades used in Examples and Comparative Examples, and FIGS. 2 and 3 show Examples 1 and 2, respectively.
4 and 5 show the cutter blades of Comparative Examples 1 and 2, respectively.

The cutter blade 3 of Example 1 has a width of 55 mm, and has one protrusion 3a formed at a position 20% from the end in the width direction, and its apex angle Θ is 130 °. is there.
The cutter blade 3 of Example 2 has a width of 55 mm similar to that of Example 1, has two protrusions 3a formed at positions of 15% from both ends in the width direction, and has an apex angle Θ. Is 110 ° in all cases.

The cutter blade 30 of Comparative Example 1 has a width of 55 mm similar to that of Example 1, and is similar to a commercially available cellophane tape cutter, and has nine protrusions 30a (10 from one end in the width direction, 20, 30, 40, 50, 60, 7
(0, 80, 90% positions) are formed, and each apex angle Θ
o is about 60 °. The cutter blade 30 of Comparative Example 2 has a width of 55 mm, which is the same as that of Example 1, and one projecting portion 30 formed at the central portion (50% from the end in the width direction).
a and its apex angle Θo is 165 °.

In each of these Examples and Comparative Examples, the tape is a biaxially oriented polypropylene (thickness: about 40 μm) single-sided corona-treated film Trefan B02575.
(Trade name, manufactured by Toray Industries, Inc.), an acrylic emulsion pressure-sensitive adhesive NT-63 (trade name, manufactured by Toagosei Co., Ltd.) was used to perform cutting evaluation by the following evaluation methods using a resin adhesive tape. .

[Evaluation Method] Cutter blades 3 and 3 having the above shapes
No. 0 was attached to a hand cutter HC-50 (trade name; manufactured by Nitto Denko Corporation), and an adhesive tape having a width of 50 mm was attached to the hand cutters 3 and 30 and attached to a corrugated board for evaluation.

(Cutability) The easiness of cutting the tape with a hand cutter (whether cutting, wrinkles, scratches) was investigated.

(Ease of Peeling) A tape was attached to a corrugated board using a hand cutter, and tearing when the tape was peeled from the cut corners was evaluated.

(Dirt on blade) By cutting the tape, the number of times of cutting until the blade was stained (visually) was counted.

[0028]

[Table 1] Here, ◯ indicates good cuttability and easiness of peeling, × indicates defective cutting, tearing or vertical cracking occurred when peeled off, and-indicates that discrimination was not possible.

In Examples 1 and 2, both the cutting property and the easiness of peeling were excellent, and the dirt of the blade was not recognized even after cutting 2000 times or more, whereas the comparative example 1 was excellent in the cutting property, but was peeled off. In terms of easiness, vertical cracking occurs and partial peeling occurs, and the blade stain becomes noticeable after 1500 cuttings, which is clearly inferior to Examples 1 and 2. Further, in Comparative Example 2, although the adhesive tape had a hole formed by abutting the convex portions of the cutter blade, the subsequent cutting did not proceed, and in the end, the cutting operation could not be performed by a normal cutting operation.
When it was cut with a strong and large pulling force, wrinkles and scratches were generated.

[Other Embodiment] (1) In the above embodiment, an example in which a cellophane tape is used as the adhesive tape has been shown, but the adhesive tape to which the present invention is applicable is not limited to this, and various resins can be used. It can also be applied to adhesive tape made of paper, adhesive tape made of paper, adhesive tape made of cloth, and the like.

[Brief description of drawings]

FIG. 1 is a cutting device 1 having a cutter blade according to the present invention.
Perspective view showing an example

FIG. 2 is a front view of the cutter blade according to the first embodiment of the present invention.

FIG. 3 is a front view of a cutter blade according to a second embodiment of the present invention.

FIG. 4 is a front view of a cutter blade of Comparative Example 1.

FIG. 5 is a front view of a cutter blade of Comparative Example 2.

[Explanation of symbols]

2 Adhesive tape 3a convex portion Θ vertical angle

Continued front page    (72) Inventor Noriyuki Tanaka             1057, Nakanishi, Hojo City, Ehime Prefecture 1 Nitto Mashi             Narry Co., Ltd. F-term (reference) 3C027 DD02 DD08                 3F062 AA04 AB01 BA01 BD02 BF01                       BG01 BG11

Claims (4)

[Claims] 1. A cutter blade having two or less convex portions for cutting an adhesive tape, wherein the apex angle of the convex portions is 16
A cutter blade characterized by being 0 ° or less. 2. The cutter blade according to claim 1, wherein the tip of the convex portion is located within 40% from the end portion side in the width direction. 3. A cutting device comprising the cutter blade according to claim 1. 4. The cutting device according to claim 3, further comprising a mounting portion for mounting an adhesive tape wound around the core material.