JPH0430885A - Cutter - Google Patents

Abstract

PURPOSE:To cut off one piece of paper only and prevent a ruler or the like from being damaged by providing the tip of a handle with a cutting edge tip to select the angle of the cutting edge tip in the range of 60 deg. - 120 deg., and by preventing a paper piece on the rear side surface of said paper piece, from being notched. CONSTITUTION:A cutting edge piece 1 is formed with a comparatively thin ceramic sheet. On the ceramic sheet, a slender channel 4 is formed, and by applying a force for it to be folded from both the sides of the channel, the sheet is divided along the channel, and at an end edge on the side opposite to the channel 4, the cutting edge piece 1 having a cutting edge tip 5 at the angle alpha of about 90 degrees is formed. A synthetic resin handle 2 is flattened and slender as a shank, and the tip section of the handle 2 is formed so that the width may be made larger slightly and gradually as the tip section comes to the tip side. At the time of forming the handle 2, the cutting edge piece 1 is fitted in a fixed state by inserting the piece 1 to be molded into the tip of the handle 2, and the rough bisector(a) of the cutting edges tip 5 at about 90 degrees coincides roughly with the direction of the axis(b) of the handle 2, and the whole cutting edge tip 5 is set to be inclined to a plumb surface(c) to the axis(b) of the handle 2 and to be positioned on the one side of the handle 2.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cutter suitable for cutting paper, and in particular, for cutting out newspapers and the like.

2. Description of the Related Art Conventionally, for example, in order to cut out newspapers, etc., a cutter made of metal and having a cutting edge with as small an angle as possible has been used.

Problems to be Solved by the Invention However, with the conventional cutter as described above, the angle of the cutting edge is extremely small, and when cutting out newspapers, etc., it is difficult to cut out only the pages containing the desired article. , the back page may be cut, and if there are only a small number of pages, there is a risk of penetrating the table and damaging the table. In such a case, it is necessary to insert a mount on the back side of the desired page, which is a tedious task, and it also cuts the mount, so it must be replaced frequently, making it difficult to use. Economical. A possible solution to this problem would be to make the protruding length of the blade adjustable, but it is impossible to adjust it to cut only one sheet of thin paper such as newspaper. Yes, such a cutter has not been realized.

In addition, metal blades are not only inferior in durability, but also can easily cut if touched carelessly with the tip of a finger, which is dangerous, so care must be taken when handling them. In addition, metal blades have a long cutting edge and are formed at an extremely small angle as mentioned above, so you can place it on a ruler, etc., place the end of the cutting edge on a newspaper, etc., and insert it along the ruler. When cutting, there were problems such as scraping the ruler behind the cutting edge and damaging it.

In view of the above-mentioned circumstances, the inventor has conducted various tests and researches, and found that
It was discovered that by selecting the angle of the cutting edge in the range of 60 to 120 degrees, it is possible to cut not only relatively thick paper but also thin paper, and based on this, it has a simple configuration, and To provide a cutter which can cut only one sheet of paper without requiring a mount, and which can prevent damage to the ruler etc. even when cutting along the ruler etc. By using ceramics, it is possible to obtain a highly durable cutting edge by simply folding the ceramic plate without the need for polishing. Furthermore, we have determined that this cutting edge does not cause any damage to fingertips, and based on this we have developed a cutting edge. can be easily obtained, therefore,
To provide a cutter that is economical and has a long service life, and can be easily handled by preventing damage to fingertips, etc. It is an object of the present invention to provide a cutter that can be reliably attached in a fixed state.

Means for Solving the Problems The technical solution of the present invention for achieving the above object is as follows:
A cutting edge is provided at the tip of the handle, and the angle of this cutting edge is 60 to 12.
It was selected within the 0 degree range.

Then, the blade piece provided with the above-mentioned cutting edge can be attached to the tip of the handle.

Alternatively, the blade edge is formed by dividing a ceramic plate material along the groove, the handle is made of synthetic resin, and the blade piece is attached to the tip of the handle by insert molding. It is.

Further, it is preferable that the handle is formed into a flat and elongated shape, and the cutting edge is disposed on one side of the handle.

Therefore, according to the present invention, the page can be cut by holding the handle and moving the blade edge against the paper surface so that its bisector is substantially perpendicular to the paper surface. At this time, by forming the cutting edge at a large angle in the range of 60 to 120 degrees, it is possible to prevent cutting into the paper on the back side and cut only one sheet of paper unless the cutting edge is pressed with a very strong force. During this cutting, since the angle of the cutting edge is formed to be large in the range of approximately 60 to 120 degrees as described above, the cutting edge can be separated from the ruler etc. even if it is moved along the ruler etc.

In addition, by using ceramics, it is possible to obtain a cutting edge with an angle of approximately 90 degrees without grinding by simply folding and dividing the ceramic plate along the groove, and it is also possible to improve durability. Additionally, ceramics will not damage your fingertips.

Further, by positioning the cutting edge on one side of the handle, the position of the cutting edge can be easily confirmed from above.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings.

Figures 1 to 5 show a cutter in an embodiment of the present invention, with Figure 1 being a front view, Figures 2 and 3 being a left side view, a right side view of Figure 1, and Figure 4 respectively. is an enlarged view of the main part of Fig. 1, Fig. 5 is a perspective view thereof, Fig. 6A is a perspective view of the material used for the ceramic blade, and Fig. 6B is a perspective view of the blade formed from the above material. It is a diagram.

In FIGS. 1 to 5, 1 is a ceramic blade, and 2 is a synthetic resin handle.

The blade piece 1 is formed from a relatively thin ceramic plate 3 as shown in FIG. 6A. That is, when the ceramic plate 3 is molded, a narrow groove 4 is formed, and this groove 4
By applying force to fold from both sides of the
As shown in FIG. 2, a blade piece 1 is formed which is divided along the groove 4 and has a cutting edge 5 having an angle a of approximately 90 degrees on the edge opposite to the groove 4. By forming grooves 4 in advance in the ceramic plate 3 during molding, 1 it can be easily divided along the grooves 4, and the edge on the opposite side of the grooves 4 can be polished. Instead, it can be used as the cutting edge 5. As shown in Figures 1 to 5, the handle 2 made of synthetic resin is formed into a flat and elongated shape like a handle, and its tip gradually becomes slightly wider as it reaches the tip. . When the handle 2 is molded, the cutting edge 1 is insert-molded at the tip thereof and is securely attached in a fixed state. In particular, as is clear from Figure 4,
The approximately bisector a of the 90-degree cutting edge 5 almost coincides with the axis of the handle 2, and in particular, as is clear from FIG. It is inclined with respect to a vertical plane C relative to the handle 2, and is set so that the cutting edge 5 is located on one side of the handle 2.

The operation of the above configuration will be described below.

Hold the handle 2 in your hand so that its axis B is almost vertical,
The page can be cut by pressing the protruding end of the cutting edge 4 of the blade piece 2 against the paper surface so that its bisector a is substantially perpendicular to the paper surface. At this time, with a conventional sharp-angled blade, the cut pages do not prevent the blade from moving forward, so even if it is pressed with a relatively weak force, the pages on the back side are sequentially cut.However, according to the embodiment of the present invention, as described above, By forming the cutting edge 5 at a large angle of approximately 90 degrees, the cutting edge 5 will only give a thin shape to the paper on the back side, preventing it from cutting unless too much pressure is applied for reasons explained later. However, only one sheet of paper can be cut.

At this time, since the cutting edge 5 is located on one side of the handle 2, its position can be easily confirmed from above, and the cutting operation can be easily performed. In addition, by forming the blade piece 1 from ceramics as described above, durability is improved,
It is possible to extend the lifespan, and it is easy to handle without damaging the fingertip. In addition, since the angle of the blade edge 5 is formed at a large angle of approximately 90 degrees as described above, when cutting paper using a ruler, etc., the body of the blade piece 1 or the tip of the handle 2 is attached to the ruler, etc. By moving the blade along the ruler, the blade edge 5 can be separated from the ruler, etc., and the blade edge 5 can be prevented from cutting into the ruler or the like and being damaged.

FIG. 7 shows the average value of the results of multiple newspaper cutting tests using metal for the blade 1, changing the angle of the cutting edge 5 sequentially, and applying a cutting edge load of 10 dazzles and 5 kg.

In the case of a cutting edge load of 10 degrees, as shown by the dotted line in Figure 7, when the cutting edge angle becomes larger than 30 degrees, the number of pieces cut gradually decreases to an average of 2.5 pieces at 60 degrees, and 90 to 120 pieces.
At angles greater than 120 degrees, only one sheet could be cut on average, and at angles greater than 120 degrees, no sheets could be cut.

On the other hand, in the case of a cutting edge load of 5 kg, as shown by the solid line in Fig. 7, when the cutting edge angle becomes larger than 30 degrees, the number of pieces cut gradually decreases to an average of 1.5 pieces at 60 degrees, and from 90 to 90.
At 120 degrees, only one sheet can be cut on average, and 12
When the angle was greater than 0 degrees, not a single sheet could be cut. The reason for this is presumed to be that as the cutting edge angle increases as described above, the cutting force against the paper becomes insufficient and the cut paper prevents the cutting edge from moving forward.

Normally, when cutting newspapers, etc., a load of 5 kg or more is not applied to the blade edge. Therefore, from the above test results, by selecting the blade edge angle in the range of 60 to 120 degrees, it is possible to cut only one sheet of newspaper, etc. It is clear that the most preferable angle is around 90 degrees. And Habo 9
If 0 degrees is selected, ceramics can be used as described above, and the cutting edge 5 can be obtained by simply dividing the ceramic plate 3 along the grooves 4 without polishing. It is also preferable from the point of view of material selection.

In the above embodiment, ceramic is used for the blade 1, but metal can also be used if the blade edge 5 is formed by polishing. Further, in the above embodiment, the cutting edge 5 is positioned on one side of the handle 2 to make it easier to confirm the position of the cutting edge 5 from above, but the present invention is not necessarily limited to this. Further, the shape of the handle 2 is not limited to a straight shape as in the above embodiment, but may be bent at a right angle, and does not necessarily have to be flat or elongated, and various shapes can be selected.

In addition, the present invention can be modified in various ways without departing from its basic technical concept.

As described in detail, according to the present invention, a cutting edge is provided at the tip of the handle, and the angle of this cutting edge is selected in the range of 60 to 120 degrees. The page can be cut by pressing it against the paper surface and moving it so that the line is approximately perpendicular to the paper surface. At this time, by forming the blade edge at a large angle in the range of 60 to 120 degrees as described above, the cut page will prevent the blade edge from moving forward, so unless you press it with too strong force, it will not cut into the paper on the back side. It is possible to cut only one sheet of paper. In this way, it is possible to reliably cut only one sheet of paper with a simple configuration without requiring a special means for adjusting the protruding length of the cutting edge, and without requiring a mount. In addition, since the angle of the cutting edge is formed at a large angle in the range of 60 to 120 degrees as mentioned above, the cutting edge can be separated from the ruler, etc. even when moved along the ruler, etc., thereby preventing damage to the ruler, etc. can do.

By using Mabuni and ceramics, you can easily obtain a cutting edge with an angle of approximately 90 degrees without grinding by simply dividing the ceramic plate along the grooves, and you can also improve durability. Therefore, it is possible to achieve economical efficiency and a long service life, and ceramics can be easily handled without damaging the fingertips.

In addition, by insert-molding the ceramic blade at the tip of the synthetic resin handle, the blade can be easily and securely attached, and the handle can be placed along a ruler, etc. Paper can also be cut by moving it, and damage to rulers etc. can be reliably prevented.

Further, by positioning the cutting edge on one side of the handle, the position of the cutting edge can be easily confirmed from above, and the cutting operation can be easily performed.

[Brief explanation of drawings]

Figures 1 to 5 show a cutter in an embodiment of the present invention, with Figure 1 being a front view, Figures 2 and 3 being a left side view, a right side view of Figure 1, and Figure 4 respectively. is an enlarged view of the main part of Fig. 1, Fig. 5 is a perspective view thereof, Fig. 6A is a perspective view of the material used for the ceramic blade, and Fig. 6B is a perspective view of the blade formed from the above material. FIG. 7 is a table showing the test results when newspaper was cut by changing the angle of the cutting edge. 1...Blade piece, 2...Handle, 5...Blade tip. - Mr.

Claims (5)

[Claims] (1) A cutting edge is provided at the tip of the handle, and the angle of this cutting edge is 60
Cutter selected in the range of ~120 degrees. (2) The cutter according to claim 1, wherein the blade piece having a cutting edge is attached to the tip of the handle. (3) The cutter according to claim 1 or 2, wherein the cutting edge is formed by dividing a ceramic plate along the groove. (4) The cutter according to claim 2 or 3, wherein the handle is made of synthetic resin, and the blade piece is attached to the tip of the handle by insert molding. (5) The cutter according to any one of claims 1 to 4, wherein the handle is flat and elongated, and the cutting edge is arranged on one side of the handle.