JPH0419094A - cutting blade - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cutting blade that is pressed against an object to cut a part of the object.

[Prior Art] Conventionally, as described in Japanese Patent Publication No. 16105/1983, cutting blades for cutting tapes with symbols, characters, etc. written on them into predetermined lengths have been linear or arcuate. The end of the tape is cut into a straight line or an arc. Further, the cutting blade disclosed in Japanese Utility Model Publication No. 1-23423 has a substantially semicircular shape and cuts the corners of cards and the like into circles.

[Problem to be solved by the invention] However, the tape end cut by the linear blade is
Each of the four corners is bent or curled up and easily deformed. As a result, there is a serious drawback in that the tape lifts off the surface it is attached to and peels off from the hexagonal corners.

In addition, when cutting with the above circular arc blade or semicircular blade,
For example, if you try to reduce the margins at the end of the tape, the first
As shown in Figure 1, there is a possibility that characters such as rHJ, vertical culvert, or part of the underline near the edge of the tape may be cut off. Further, if the cut end is arcuate or semicircular, there is a problem in that it is very difficult to stick and position the cut end.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a cutting blade that cuts the cut end of an object to be cut into a shape having a straight 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, an arcuate blade portion directly on both sides of the linear blade portion, and an arcuate blade portion. It has a linear auxiliary blade portion extending from the blade portion in a tangential direction thereof at an obtuse angle with the linear blade portion.

[Function] In the cutting blade having the above configuration, the linear blade section cuts a part of the object in a straight line, and the arcuate blade section connects both ends of the straight line to cut it in an arc shape. .

Then, the auxiliary blade section cuts both ends of the cut arc in a tangential direction of the arc, in a straight line that makes an obtuse angle with the straight line cut by the linear blade section.

r Example] Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 is a schematic configuration diagram of a tape edge processing device equipped with a cutting blade, which is an embodiment of the present invention, and FIG. 2 is a perspective view of a printing device equipped with the edge processing device. As shown in FIG. 2, in this embodiment, the upper surface 2a of the housing 2 of the printing device 1 is
The end portion 6 of the tape 4 printed by the printing device 1 can be easily processed.

First, to briefly explain this printing device 1, a rotatable character selection dial 8 is provided on the upper surface 2a of the housing 2.
is provided, and alphanumeric characters, symbols, codes, etc. are displayed on the annular dial surface 10. Adjacent to the character selection dial 8, a group of function keys 14 for controlling various types of the printing device 1 is provided. It is sent out to the outside of the housing 2. The fed-out tape 4 is cut into a predetermined length by a cutting mechanism (not shown) with a predetermined margin created from the configuration of the printing device 1 behind the printed portion, and is cut into a predetermined length as shown in FIG. , a tape 4 of a predetermined length is created.

Next, the end 6 of the tape 4 printed and cut as described above is
The tape edge processing device 20 for processing the tape will be described. The tape edge processing device 20 is provided on the upper surface 2 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 recessed according to the width of the tape 4 to form a guide t, 22 which can be inserted with the tape surface 4a of the tape 4 facing upward. As shown in FIG. 1, a stop surface 24 is provided in the guide groove 22, with which the leading end of the tape 4 comes into contact when the tape 4 is inserted, thereby restricting further insertion of the tape 4.

Further, a cutter holder 30 made of polyacetal, nylon, etc. is provided in the guide groove 22 so as to straddle the inserted tape 4 . As shown in FIG. 3, this cutter holder 30 has locking portions 32 (only one shown) formed on both sides thereof, and a claw 34 (only one shown) at the tip thereof. . This claw 34 is attached to the main body 2.
1, and the cutter holder 30 is removably attached to the main body 21.

The tape 4 is inserted into the guide groove 22 of the cutter holder 30.
A tape guide part 36 that prevents the tape 4 from lifting up and guides it so that it can be inserted properly when inserted into the tape.
is provided. Furthermore, an elastic part 38 that can be elastically deformed is formed to extend substantially parallel to the tape 4 to be inserted toward the stop surface 24, and at the tip of this elastic part 38 is a cover with a hollow interior. A section 40 is provided. Also,
Two presser feet 42 and 44 extend obliquely downward from this cover portion 40 toward the tape surface 4a.
44 is bent to press the end 6 of the tape 4 against the guide groove 22.

A portion of the cover portion 40 is cut out, and the tape 4
A holding portion 46 that hangs down toward a is formed inside the cover portion 40. A pin portion 48 is erected on this holding portion 46 and protrudes in a direction parallel to the tape surface 4a. The pin portion 48 is connected to the engagement hole 52 of the cutting blade 50.
The cutting blade 50 is inserted into the pin portion 48 so that the cutting blade 50 can swing around the pin portion 48 . Further, the diameter of the pin portion 48 is made smaller than the diameter of the engagement hole 52 by a predetermined amount, so that the pin portion 48 is engaged with the pin portion 48 so that the cutting force 50 can swing back and forth as shown by arrow A in FIG. The cutting blade 50 is attached to the tape surface 4 so that the cutting blade 50 can freely swing from side to side and back and forth.
It is made to hit point a uniformly and stably. Note that in order to prevent the cutting blade 50 from coming off the engagement hole 52, the cover portion 40 is
A rib 51 extending toward the cutting blade 50 is formed on the inner side of the cutting blade 50 .

The cutting blade 50 has a linear blade portion 54 provided along the width direction of the tape 4, as shown in FIGS. 4 and 6. On both sides of this linear blade part 54, arcuate blade parts 56, 58 each having a radius R are connected to the linear blade part 54.
is formed.

In addition, linear auxiliary blades extend from the split arc-shaped blade parts 56 and 58 in the tangential direction of the circle with radius R so that the angle θ formed with the linear blade part 54 is an obtuse angle. Part 60
, 62 are provided. In this embodiment, this angle θ is set to 120 degrees, but a range of about 105 degrees to 140 degrees is appropriate. Further, as shown in FIG. 7, by setting the angle θ to 120 degrees, the arcuate blade portions 56, 58
When the tape 4 is cut, it can be visually recognized that the corners are rounded. If the angle θ is made larger than this,
It becomes difficult to recognize the rounded corners in terms of appearance.

Further, in this embodiment, the tape 4 has a width W of 12 mm, and the error t of the width W is ±
It is 0.5 mm. Therefore, the minimum width is 11.5m
m, but in accordance with the minimum width of the tape 4, in this embodiment, the linear blade portion 54 and the split arc blade portion 58.6 are
0 is formed to have this minimum width. That is, even when cutting the tape 4 with the minimum width, the tape 4
At least a roundness is formed at the corner by the arcuate blade portions 56, 58. In addition, the linear blade portion 54 and the split arcuate blade portion 56
, 58 is made even smaller than the minimum width,
The amount cut by the auxiliary blade parts 60 and 62 becomes larger,
It gives the impression of being chamfered in a straight line rather than being rounded, and the soft feel of the roundness is lost.

On the other hand, when forming this cutting blade 50, in this embodiment,
A straight blade made of SK material with a shore hardness of approximately H360 has a radius of R.
The linear blade portion 54° and the arcuate blade portion 56, 5 are bent into a circular arc.
8. Auxiliary blade parts 60 and 62 are formed.

A lever 64 is rotatably supported on the main body 21 and is pulled in a direction to be housed in the main body 21 by a tension spring 66. By swinging the cutter holder 3 in the direction of arrow B against the tensile force of the tension spring 66, the cutter holder 3
By pushing down the holding part 46 of the tape 0, the elastic part 38 is elastically deformed, and the cutting blade 50 can be moved toward the tape surface 4a.

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

First, the printing device 1 prints a tape 4 as shown in FIG.
is created. In order to process the end 6 of this tape 4, the user inserts the tape 4 into the guide groove 22, is guided by the tape guide 36, and presses the presser foot 42, 44.
bend and lift it, and insert it until the tape 4 comes into contact with the stop surface 24. Then, when the lever 64 is swung in the direction of arrow B against the tensile force of the tension spring 66, the presser foot 4
2.44 presses down the holding part 46 of the cutter holder 30 while holding the tape 4 to prevent the tape 4 from slipping, and moves the cutting blade 50 toward the tape surface 4a to cut the tape and cut the end 6. Cut it out and treat the ends.

During this cutting, the linear blade portion 54 of the cutting blade 50
cut into a straight line parallel to its width direction.

Further, the arc-shaped blade portions 56 and 58 of the cutting blade 50 connect with the straight line of the tape 4 cut by the linear blade portion 54, and cut the tape 4 into a circular arc having a radius R of the arc-shaped blade portions 56 and 58. Then, the auxiliary blade portions 60 and 62 of the cutting blade 50 cut in the tangential direction of the circular arc having the radius R and at an obtuse angle θ with the linear cut made by the linear blade portion 54 . As a result, the end portion 6 of the tape 4 is cut so that both corners of the tape 4 appear rounded, as shown in FIG. 8(A).

Since the corners of the tape 4 are rounded, it is difficult to peel off from the corners. In addition, since a straight part is also formed by the linear blade part 54, when pasting the tape 4 along the edge, it can be pasted based on this straight part, making it easy to paste the tape 4. become.

Further, the width W of the tape 4 varies, and some tapes have a wide width W while others have a narrow width W. Moreover, the guide groove 22 is
It is formed wider than that so that even items with a wider width W can be inserted.

Therefore, when the tape 4 is inserted into the guide groove 22, the tape 4 may be stuck on one side of the guide groove 22.

Even in this case, in this embodiment, as shown in FIG. 8(b), although the degree of cutting is different at both corners, at least the arc-shaped blade portions 56 and 58 cut into an arc shape, and the arc-shaped blade The portions 56 and 58 and the auxiliary blade portions 60 and 62 form rounded corners to the extent that they do not cause problems in terms of appearance.

On the other hand, if the angle θ between the linear blade portion 54 and the auxiliary blade portions 60 and 62 is close to a right angle, there will be no misalignment between the tape 4 and the cutting blade 50, as shown in FIG. If the edges are cut with their centers aligned, the corners will be approximately even. However, due to variations in the width W of the tape 4,
If the positions of the tape 4 and the cutting blade 50 do not match and the tape is cut with its center deviated, one corner will be cut long and large by the auxiliary blade parts 60 and 62, as shown in FIG. The cut at the other corner is small and is cut in a manner that gives a very unbalanced feel, which actually makes the layer look worse.

For example, when cutting with a tool having auxiliary blade portions 60 and 62 with a very wide angle θ, as shown in FIG.
As shown in (a), if the tape 4 and the cutting blade 50 are cut with no misalignment and their centers coincide, the corners will be formed in a substantially uniform state. However, the shape of the tape 4 deviates from having rounded corners. Furthermore, due to variations in the width W of the tape 4, etc., the positions of the tape 4 and the cutting blade 50 do not match, and if the tape is cut with its center deviated, one corner of the tape 4 may be cut as shown in FIG. The cut ends up being very small and is cut in a way that gives a very unbalanced feel.

As described above, the present invention is not equally limited to these embodiments, and may be implemented in various forms without departing from the gist of the present invention.

That is, the cutting blade of the present invention can be used in cutting devices other than tape edge processing devices, such as devices for cutting the corners of cards.

[Effects of the Invention] As described in detail above, the cutting blade of the present invention has a linear blade part, an arcuate blade part, and an auxiliary blade part, so that it cuts the object in a straight line,
Cut the arc while connecting the arc on both sides and the straight line tangential to the arc. Therefore, since the corners of the cut end of the object to be cut are rounded, if the object to be cut is a tape or the like, it becomes difficult to peel off.

Also, since there is a straight part at the cut end, sticking becomes easier.

[Brief explanation of drawings]

1 to 8 show an embodiment embodying the present invention, FIG. 1 is a sectional view of a tape edge processing device equipped with a cutting blade according to the present invention, and FIG. 2 is a tape edge treatment device according to the present invention. 3 is an enlarged perspective view of the cutter holder, FIG. 4 is an enlarged perspective view of the cutting blade, and FIG. 5 is a front view of the tape produced by the printing device. Figure 6 is an explanatory diagram of the cutting blade, Figure 7 is an explanatory diagram of the arcuate blade portion of the cutting blade, and Figure 8
The figure is an explanatory diagram of a tape cut by a cutting blade, Figure 9 is an explanatory diagram of a tape cut by a cutting blade whose angle is close to a right angle,
FIG. 0 is an explanatory diagram of a tape cut with a cutting blade having a large angle difference, and FIG. 11 is an explanatory diagram of a tape cut with a conventional semicircular cutting blade. In the figure, 50 is a cutting blade, 54 is a linear blade part, 56° 58 is an arcuate blade part, and 60.62 is an auxiliary blade part.

Claims (1)

[Scope of Claims] 1. A linear blade portion, an arcuate blade portion connected to both sides of the linear blade portion, and an obtuse angle from the arcuate blade portion to the linear blade portion in a connecting direction. A cutting blade characterized in that it has a linear auxiliary blade part extending from the top.