JPH0741583B2 - Cutting blade - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cutting blade that presses an object to be cut to cut a part of the object.

[Prior Art] Conventionally, as disclosed in Japanese Examined Patent Publication No. 16105 / 47-16, a cutting blade for cutting a tape on which symbols, characters, etc. are cut to a predetermined length has a straight shape or an arc shape. Of the
The tape end is cut into a linear shape or an arc shape. The cutting blade disclosed in Japanese Utility Model Publication No. 1-223423 has a substantially semicircular shape and cuts a corner of a card or the like into a round shape.

[Problems to be Solved by the Invention] However, the tape end cut by the straight blade is
The corners of each of the four corners are easily bent or turned over so that they are easily deformed. Therefore, there is a serious defect that the tape rises from the surface to which it is attached and peels off from each corner.

When cutting with the arc-shaped blade or the semi-circular blade,
For example, if you try to reduce the margin at the end of the tape,
As shown in the figure, characters such as “H” near the end of the tape, a vertical bar, or a part of the underline may be cut off. Further, if the cut end has an arc shape or a semicircular shape, there is a problem that it is very difficult to perform positioning at the attachment position.

The present invention has been made to solve the above problems, and an object thereof is to provide a cutting blade that cuts a cut end of an object to be cut into a shape having a straight line portion and a curved portion.

[Means for Solving the Problems] In order to achieve the above object, the cutting blade of the present invention has a linear blade portion, arcuate blade portions directly formed on both sides of the linear blade portion, and the arcuate shape. It has a linear auxiliary blade portion extending at an obtuse angle with the linear blade portion in the tangential direction from the blade portion.

[Operation] In the cutting blade having the above-described configuration, the linear blade section cuts a part of the object to be cut into a straight line, and the arcuate blade section connects both ends of the straight line to the straight line to cut into an arc shape. . Then, the auxiliary blade portion cuts both ends of the cut arc in the tangential direction of the arc to form a straight line that forms an obtuse angle with the straight line cut by the straight blade part.

Embodiments Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a tape edge processing apparatus having a cutting blade according to an embodiment of the present invention, and FIG. 2 is a perspective view of a printing apparatus having the edge processing apparatus. As shown in FIG. 2, in this embodiment, it is integrally provided on the upper surface 2a of the housing 2 of the printing apparatus 1 so that the end portion 6 of the tape 4 printed by the printing apparatus 1 can be easily processed. Has been done.

First, the printer 1 will be briefly described. On the upper surface 2a of the housing 2, a rotatable character selection dial 8 is provided, and an annular dial surface 10 is provided with alphanumeric characters, symbols, symbols and the like. It is displayed. And character selection dial 8
Adjacent to, the function key group 14 for performing various controls of the printer 1
The input characters are displayed on the liquid crystal display 16, printed on the tape 4, and sent out from the tape discharge port 18 to the outside of the housing 2. Tape 4 sent out
Is cut into a predetermined length by a cutting mechanism (not shown) behind the printing portion with a predetermined margin generated from the configuration of the printing apparatus 1 and the like, and a predetermined length as shown in FIG. Tape 4 is created.

Next, the end 6 of the tape 4 printed and cut as described above
A tape end processing device 20 for processing a tape will be described.
The tape end processing device 20 is provided on the upper surface 2a of the housing 2. As shown in FIG. 1, a part of the housing 2 also serves as the main body 21 of the tape end processing device 20. The upper surface 2a is depressed according to the width of the tape 4 and the tape 4
A guide groove 22 that can be inserted with the tape surface 4a of the above is formed. As shown in FIG. 1, a stop surface 24 is provided in the guide groove 22 so that the leading end of the tape 4 comes into contact when the tape 4 is inserted and restricts further insertion of the tape 4.

In addition, the cutter holder 30 made of polyacetal, nylon or the like is provided so as to straddle the inserted tape 4 in the guide groove 22.
Is provided. As shown in FIG. 3, the cutter holder 30 has locking portions 32 (only one is shown) on both sides thereof.
Is formed, and a claw 34 (only one of which is shown) is provided at the tip thereof. The claw 34 is engaged with the main body 21 and the cutter holder 30 is detachably attached to the main body 21.

The cutter holder 30 is provided with a tape guide portion 36 that prevents the tape 4 from rising when the tape 4 is inserted into the guide groove 22 and guides the tape 4 so that the tape 4 can be properly inserted. Further, an elastic portion 38 that is elastically deformable is formed so as to extend toward the stop surface 24 substantially in parallel with the tape 4 to be inserted, and at the tip of this elastic portion 38, a cover portion having a hollow inside is formed. 40 are provided. Also, this cover part 40
From the tape 4a toward the tape surface 4a, the two presser feet 42 and 44 are obliquely extended downward, and the presser feet 42 and 44 are bent to form the tape 4
It is arranged that the end portion 6 of the above is pressed against the guide groove 22.

A part of the cover part 40 is cut out, and a holding part 46 hanging down toward the tape 4a is formed inside the cover part 40. The holding portion 46 is provided with a pin portion 48 standing upright in a direction parallel to the tape surface 4a. And
The pin portion 48 is inserted into the engaging hole 52 of the cutting blade 50,
The pin 50 is designed to be swingable around the pin portion 48. Further, the diameter of the pin portion 48 is made smaller than the diameter of the engaging hole 52 by a predetermined amount, and the cutting blade 50 is moved as shown by an arrow A in FIG.
It is engaged with the pin part 48 so that it can swing back and forth, and the cutting blade
The cutting blade 50 uniformly and stably hits the tape surface 4a so that the left and right and the front and back can freely swing. As shown in FIG. 3, a rib 51 extending toward the cutting blade 50 is formed inside the cover portion 40 so that the cutting blade 50 does not come off from the pin portion 48.

The cutting blade 50, as shown in FIGS. 4 and 6, has a linear blade portion 54 provided along the width direction of the tape. Then, on both sides of this straight blade 54,
Arc-shaped blade portions 56 and 58 having a radius R are formed so as to be connected to 54. In addition, an angle θ formed by the arcuate blade portions 56 and 58 in the tangential direction of the circle having the radius R and with the linear blade portion 54.
Straight auxiliary blades 60,62 that are extended so that
Is provided. In the present embodiment, this angle θ is set to 120 degrees, but a range of about 105 degrees to 140 degrees is suitable. Further, as shown in FIG. 7, by setting the angle θ to 120 degrees, it can be recognized that the corners are externally rounded when the tape 4 is cut by the arcuate blade portions 56 and 58. When the angle θ is made larger than this, it becomes difficult to recognize that the corners are rounded in appearance.

Further, in this embodiment, the width W of the tape 4 is 12 mm, and the tape 4 has an error t of ± 0.5 m.
m. Therefore, although the minimum width L is 11.5 mm, in the present embodiment, the linear blade portion 54 and both arc-shaped blade portions 58, 60 correspond to the minimum width L of the tape 4. Minimum width L
It is formed so that. That is, even when the tape 4 having the minimum width L is cut, the arc-shaped blade portion 5 is formed at the corner of the tape 4.
At least a roundness of 6,58 is formed. Further, if the widths of the straight blade portion 54 and the arc-shaped blade portions 56, 58 are made smaller than the minimum width L, the amount of cutting by the auxiliary blade portions 60, 62 becomes large, and the straight blade is not rounded. It gives a feeling of being chamfered, and the softness due to roundness is impaired.

On the other hand, when forming the cutting blade 50, in the present embodiment, a straight blade made of SK material having a Shore hardness of about H60 is bent into an arc having a radius R to form the straight blade portion 54 and the arc blade portion. 56,58, auxiliary blade 60,6
Forming two.

A lever 64 is rotatably supported on the main body 21, and is pulled by a spring 66 in a direction to be stored in the main body 21. Arrow B against the tensile force of the spring 66
By holding the cutter holder 30
Push down 46 to elastically deform elastic part 38 and cut blade 50.
Can be moved toward the tape surface 4a.

Next, the operation of the tape edge processing device of this embodiment will be described.

First, the tape 4 as shown in FIG.
Is created. Then, in order to process the end portion 6 of the tape 4, the user inserts the tape 4 into the guide groove 22, is guided by the tape guide 36, and bends the presser feet 42, 44 to lift it. Insert the tape 4 until it abuts the stop surface 24. Then, when the lever 64 is swung in the direction of the arrow B against the tensile force of the tension spring 66, the presser feet 42, 44 are moved to the tape 4
While holding down the tape 4 to prevent the tape 4 from shifting, the holding portion 46 of the cutter holder 30 is pushed down and the cutting blade 50 is moved to the tape surface 4a.
The tape is cut by moving it toward, and the end portion 6 is cut off for end treatment.

At the time of this cutting, the linear blade portion 54 of the cutting blade 50 cuts the tape 4 linearly in parallel with the width direction. Further, the arcuate blade portions 56, 58 of the cutting blade 50 are connected to the straight line of the tape 4 cut by the linear blade portion 54 and cut into an arcuate shape having a radius R of the arcuate blade portions 56, 58. Then, the auxiliary blade portions 60, 62 of the cutting blade 50
However, the cutting is performed in the tangential direction of the circular arc having the radius R and at an obtuse angle θ with the linear cutting by the linear blade portion 54. As a result, the end portion 6 of the tape 4 is, as shown in FIG.
Both edges of the tape 4 are cut to give a rounded feel. Since the corners of the tape 4 are rounded, it is difficult to peel off the corners. Further, since the straight line portion is also formed by the straight blade portion 54, when the tape 4 is pasted along the edge to which the tape 4 is pasted, the tape 4 can be pasted and the tape 4 can be pasted easily. .

Further, there are variations in the width W of the tape 4, and a tape having a wide width W has a narrow field W. Further, the guide groove 22 is formed wider than that so that a guide groove 22 having a wide width W can be inserted. Therefore, when the tape 4 is inserted into the guide groove 22, the tape 4 may be in a state of being on one side of the guide groove 22. Even in this case, in the present embodiment, as shown in FIG. 8B, although the degree of cutting is different at both corners, at least the arc-shaped blade portions 56 and 58 cut the arc-shaped blades. By the parts 56 and 58 and the auxiliary blade parts 60 and 62,
The corners are rounded to the extent that there is no problem in appearance.

On the other hand, when the angle θ formed by the linear blade portion 54 and the correction blade portions 60, 62 is close to a right angle, there is no positional deviation between the tape 4 and the cutting blade 50 as shown in FIG. When cut with the centers of the two aligned, the corners are formed in a substantially even state.
However, due to variations in the width W of the tape 4, the tape 4
When the cutting blade 50 and the cutting blade 50 do not coincide with each other in position and the centers thereof are deviated, as shown in FIG. 9 (B), one corner is long and largely cut by the auxiliary blade portions 60, 62, and the other The cuts in the corners are small and cut with a very unbalanced feel, which makes them even worse.

Further, for example, when cutting with a tool having the auxiliary blade portions 60 and 62 in a state where the angle θ is greatly widened, there is no positional deviation between the tape 4 and the cutting blade 50 as shown in FIG. ,
When the cutting is performed with their centers aligned, the corners are formed in a substantially even state. However, it deviates from the shape of rounding the corners of the tape 4. Further, due to variations in the width W of the tape 4 and the like, the positions of the tape 4 and the cutting blade 50 do not coincide with each other, and when cutting is performed with the center thereof shifted,
As shown in Fig. 10 (b), the cut on one side becomes very small, and it is cut in a state that gives a very unbalanced feeling.

The present invention is not limited to the embodiments as described above, and can be implemented in various modes without departing from the gist of the present invention.

That is, the cutting blade of the present invention can be used for a cutting device other than the tape end processing device, for example, a device for cutting a corner of a card.

[Effects of the Invention] As described in detail above, the cutting blade of the present invention has a linear blade portion, an arc-shaped blade portion, and an auxiliary blade portion.
Cutting is performed in a state where the arcs on both sides thereof and the tangential straight line of the arc are connected. Therefore, since the corners of the cut end of the object to be cut are rounded, when the object to be cut is a tape or the like, it is difficult to peel it off. Further, since the cut end also has a straight portion, it becomes easy to attach.

[Brief description of drawings]

1 to 8 show an embodiment embodying the present invention. FIG. 1 is a cross-sectional view of a tape end processing apparatus provided with a cutting blade according to the present invention, and FIG. 2 is an end of the tape. FIG. 3 is an enlarged perspective view of a cutter holder, FIG. 4 is an enlarged perspective view of a cutting blade, and FIG. 5 is a front view of a tape produced by the printer. 6 is an explanatory view of a cutting blade, FIG. 7 is an explanatory view of an arcuate blade portion of the cutting blade, FIG. 8 is an explanatory view of a tape cut by the cutting blade, and FIG. 9 is a cutting blade whose angle is close to a right angle. Explanatory drawing of cut tape, No.
FIG. 10 is an explanatory view of a tape cut with a cutting blade having a large angle difference, and FIG. 11 is an explanatory view of a tape cut with a conventional semicircular cutting blade. In the figure, 50 is a cutting blade, 54 is a linear blade, 56 and 58 are arcuate blades, and 60 and 62 are auxiliary blades.

Claims (1)

[Claims] 1. A straight blade, arcuate blades connected to both sides of the straight blade, and extending from the arcuate blade in the connecting direction at an obtuse angle with the straight blade. A cutting blade having a linear auxiliary blade portion.