JP2001301059A - Ruled line blade for folding sheet material and sheet material with folding ruled line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide sheet material folding ruled line blades which form ruled lines which make a sheet materials easily foldable and improve durability, and the sheet material with the folding ruled lines. SOLUTION: The plate-shaped sheet material folding ruled line blades 1, 5, 11 for forming the folding ruled lines in the folding part of the sheet material have flat blade edges 2, 6, 12, and slits 4, 8, 14, 16 which are shallower than the thickness of a plate, are formed continually in the plate-shaped longitudinal direction from sides 3, 7, 9, 13, 15 to the tips of the blade edges 2, 6, 12 in the plate-shaped widthwise direction, so that the processing can be done simply only by forming the slits. Since the blade edges have flat parts, durability can be improved, and production costs can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material folding ruled line blade for forming a folding ruled line in a bent portion of a sheet material, and a sheet material with a folded ruled line.

[0002]

2. Description of the Related Art Conventionally, when processing a ruled line for bending on a plastic sheet or the like, a plate-shaped ruled line blade having a cutting edge at a tip has been used as a regular type. 7 to 9 show ruled lines 72, 82, and 92 that are easy to bend and hard to be curved.
It is a figure which shows the ruled-line blades 70, 80, 90 which have unevenness in the blade edge developed for processing into 81,91.

[0003]

However, when a plastic sheet processed by the above-mentioned conventional regular-type ruled-line blade is bent around the formed bent ruled line, rebound tends to return to an original state. On the other hand, both surfaces are likely to be curved at the boundary of the folding ruled line. In particular, if the formation of the ruled line is too weak, this tendency is remarkably exhibited, and the bending becomes difficult.

Further, the ruled-line blades 70, 80 and 90 shown in FIGS. 7 to 9 having irregularities in the tip direction of the blade edge have a complicated structure, so that the manufacturing time and the manufacturing cost are increased, and the blade is increased. However, there is a disadvantage that the durability is reduced.

Further, the ruled line 72 formed on the sheet 71 shown in FIG. 7 and the ruled line 92 formed on the sheet 91 shown in FIG. 9 both have irregularities in the depth direction of the ruled line. As the number of sheets increases, the ruled line 82 formed on the sheet 81 shown in FIG. 8 has a through-hole, so that when the sheet is frequently bent, the sheet easily breaks from the through-hole. However, there is a disadvantage that the above occurs.

In view of the above, the present invention has been made in view of the above circumstances, and a sheet material folding ruled line blade and a sheet with a folded ruled line for forming a ruled line for easily folding a sheet material and improving durability. The task is to provide materials.

[0007]

SUMMARY OF THE INVENTION The present invention is applied to a plate-shaped sheet material folding ruled blade for forming a folding ruled line in a bent portion of a sheet material. The present invention particularly relates to a sheet material having a flat cutting edge, and a slit that is intermittently provided in a plate-like length direction, the slit being shallower than the plate-like plate thickness from the side surface to the tip of the cutting edge in the plate-like width direction. This is a folding ruled line blade.

Further, the present invention is applied to a sheet material with a folding ruled line in which a folding ruled line is formed on the surface of a bent portion by a plate-shaped sheet material folding ruled blade. The present invention is, in particular, a sheet material with a folded ruled line having a flat bottom, and a protrusion smaller than the width of the ruled line intermittently provided in the length direction from the surface to the bottom in the width direction of the ruled line. .

Therefore, according to the present invention, the following operations are performed. In a commonly used regular-type plate-shaped ruled-line blade having a cutting edge at the tip, simply forming the above-mentioned slit from one side surface to the tip of the cutting edge enables easy processing of the ruled-line blade having the slit. . Further, since the blade has a flat portion, the durability is improved.

In addition, according to the ruled line formed on the sheet surface by the ruled line blade having the slit, the bending force is dispersed at the protrusions, so that the elastic stress generated in the ruled line is reduced, and the ruled line is reliably used. The bent part is large, for example, 9
It is easy to turn back to 0 to 180 degrees. Moreover, it is easy to perform fixed bending having a certain bending direction, for example, when performing one-way bending. Furthermore, while the curvature of the surface formed by the ruled lines is reduced,
Since the ruled line can be formed thin, a bent portion having a beautiful appearance is formed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sheet material folding ruled line blade according to the present embodiment forms a ruled line that facilitates bending a sheet material into a predetermined shape. Further, the sheet material with a folding ruled line of the present embodiment is one in which a folding ruled line is formed by the sheet material folding ruled line blade.

FIG. 1 is an external perspective view showing a ruled line blade of the present embodiment. These ruled line blades are applied when forming a ruled line for bending at a bent portion of a sheet material. FIG. 1A is a perspective view showing a single-sided slit ruled blade 1. The single-sided slit ruled blade 1 has a flat blade edge 2, and extends from the side surface 3 to the tip of the blade edge 2 in a plate-like width direction.
The slits 4 shallower than the plate-like plate thickness are provided intermittently in the plate-like length direction.

The above-mentioned single-sided slit ruled blade 1 forms a slit 4 from one side surface 3 to the tip of the blade edge 2 in a generally used regular type plate-shaped ruled blade having a blade edge at the tip. The cutting edge 2 has a flat portion, so that the durability can be improved and the manufacturing cost can be made easier.

FIG. 1B is a perspective view showing a double-sided opposing slit ruled line blade 5. FIG. The double-sided opposing slit ruled line blade 5 has a flat blade edge 6, and the blade edge 6 extends from the side surfaces 7, 9 in the width direction of the plate.
Slits 8 and 10 shallower than the plate thickness
Are provided intermittently in the longitudinal direction of the plate.

Here, the slits 8 and 10 are provided at positions opposing each other on one side surface 7 and the other side surface 9 of the plate shape.

The above-described double-sided opposing slit ruled line blade 5 is a generally used regular type plate-shaped ruled line blade having a cutting edge 6 at the tip. The slits 8 and 10 can be easily formed simply by forming the slits 8 and 10 at the above-described opposing positions over the tip of the cutting edge 6, and since the cutting edge 6 has a flat portion, the durability can be improved and the manufacturing cost can be reduced. be able to.

FIG. 1C shows a double-sided offset slit ruled blade 1.
FIG. The double-sided offset slit ruled line blade 11 has a flat blade edge 12, and slits 14, 16 shallower than the plate-shaped plate thickness from the side surfaces 13, 15 to the tip of the blade edge 12 in the width direction of the plate. It is provided intermittently in the length direction.

Here, the slits 14 and 16 are provided on the one side surface 13 and the other side surface 15 of the plate at positions offset (shifted) from each other. That is, the slit 14 provided on one side surface 13 is provided at a position facing the intermediate position of the slit 16 provided on the other side surface 15.

The double-sided offset slit ruled line blade 1 described above.
1 is a generally used regular-type plate-shaped ruled-line blade having a cutting edge 12 at the tip, and the above-mentioned offset from one of the side surfaces 13 and 15 to the tip of the cutting edge 12 on one and the other side surfaces 13 and 15 ( The processing can be easily performed only by forming the slits 14 and 16 at the shifted position, and the flatness is provided in the cutting edge 12, so that the durability can be improved and the manufacturing cost can be reduced.

As a material of the above-mentioned ruled line blade, for example, "carbon tool steel SK-4 type bainite treatment" can be used.

Further, as a processing machine for these ruled line blades, for example, a machine having a rotating grindstone and having a material feeding device in order to enable continuous processing can be used.

Further, as jigs and tools for these ruled line blades,
For example, a grinder can be used.

FIG. 2 is a view showing the shape of a single-sided slit ruled blade and the shape of a ruled line. 2A is a plan view of the single-sided slit ruled blade 1, FIG. 2B is a front view of the single-sided slit ruled blade 1,
2C is a sectional view taken along line A1-A1 of the single-sided slit ruled blade 1, and FIG. 2D is a perspective view of a ruled line formed on the sheet 20 by the single-sided slit ruled blade 1.

As shown in FIGS. 2A and 2B, the slit 4
Pitch P1 at equal intervals in the length direction of the single-sided slit ruled blade 1
And the slit 4 is provided on the side surface 3.
From the cutting edge to the tip of the cutting edge, and has a depth D1. Further, as shown in FIG. 2C, the slit 4 is formed in a substantially conical shape from the side surface 3 to the tip of the cutting edge, and has a conical groove t2 of about half of the plate thickness t1 of the single-sided slit ruled blade 1 at the maximum. Formed.

As shown in FIG. 2D, the ruled line 21 formed on the surface 23 of the sheet 20 by the single-sided slit ruled blade 1 is used.
Is formed so as to have a flat bottom portion 24 and to provide a projection 22 having a width W2 smaller than the width W1 of the ruled line 21 intermittently in the length direction from the surface 23 to the bottom portion 24 in the direction of the width W1 of the ruled line 21. You.

According to the ruled line 21 formed on the surface 23 of the sheet 20 by such a single-sided slit ruled blade 1, the bending force is dispersed on one side with the protrusion 22 as a boundary. Can be reliably bent at the ruled line 21 and the rebound due to bending is small, so that the bent portion is large, for example, it is easy to be folded back to 90 degrees to 180 degrees, and has a constant bending direction.
For example, when bending in one direction, fixed bending can be performed. Further, since the curvature of the surface formed by the ruled line 21 is reduced and the ruled line 21 can be formed thin, a bent portion having a beautiful appearance is finished. Can be formed.

FIG. 3 is a diagram showing the shape of the double-sided opposing slit ruled line blade and the shape of the ruled line. 3A is a plan view of the double-sided opposing slit ruled blade 5, FIG. 3B is a front view of the double-sided opposing slit ruled blade 5, and FIG.
FIG. 3D is a perspective view of a ruled line formed on the sheet 30 by the double-sided opposing slit ruled line blade 5.

As shown in FIGS.
0 are provided so as to have a pitch P2 at equal intervals in the length direction of the double-sided opposing slit ruled line blade 5, and the slits 8, 10 are substantially U-shaped from the side surfaces 7, 9 to the tip of the cutting edge. And has a depth D2 so as to be opposed to each other. Also, as shown in FIG.
The slits 8 and 10 are formed in a substantially conical shape from the side surfaces 7 and 9 to the tip of the cutting edge, and have a conical groove t3 having a maximum thickness of about 1/4 to 1/3 of the plate thickness t1 of the double-sided opposing slit ruled line blade 5. It is formed as follows.

As shown in FIG. 3D, the ruled line 3 formed on the front surface 34 of the sheet 30 by the double-sided opposing slit ruled blade 5.
1 has a flat bottom 35, and extends the projections 32, 33 having a width W3 smaller than the width W1 of the ruled line 31 from the surface 34 to the bottom 35 in the width W1 direction of the ruled line 31 at positions facing each other, in the longitudinal direction. It is formed so as to be provided intermittently.

According to the ruled line 31 formed on the surface 34 of the sheet 30 by the double-sided opposed slit ruled line blade 5, the bending force is dispersed on both sides with the projections 32, 33 formed at the opposed positions. Therefore, the elastic stress generated in the crease line 31 is reduced, the crease can be reliably bent at the crease line 31, and the rebound due to the bend is small, so that the bend portion is large, for example, it is easy to be bent to 90 to 180 degrees, and furthermore, For example, when bending in both directions is performed without flexibility, flexible bending can be performed. Further, since both sides formed by the ruled lines 31 are reduced, and the ruled lines 31 can be formed thick, the appearance is characteristic. It is possible to form a bent portion having a realistic finish.

FIG. 4 is a diagram showing the shape of a double-sided offset slit ruled line blade and the shape of a ruled line. 4A is a plan view of the double-sided offset slit ruled blade 11, FIG. 4B is a front view of the double-sided offset slit ruled blade 11, FIG.
FIG. 4D is a perspective view of a ruled line formed on the sheet 40 by the double-sided offset slit ruled blade 11.

As shown in FIGS.
16 are provided so as to be offset (shifted) so as to have a pitch P3 × 2 at equal intervals in the length direction of the double-sided offset slit ruled line blade 11.

Here, the slits 14 and 16 are provided on the one side surface 13 and the other side surface 15 of the plate at positions offset (shifted) by P3 from each other. That is,
The slit 14 provided on one side surface 13 is provided at a position facing an intermediate position P3 of the slit 16 provided on the other side surface 15.

The slits 14 and 16 are formed on the side surfaces 13 and
It is provided so as to be substantially U-shaped from 15 to the tip of the cutting edge and offset (shifted) so as to have a depth D3. Further, as shown in FIG. 4C, the slits 14 and 16 are formed in a substantially conical shape from the side surfaces 13 and 15 to the tip of the cutting edge, and at most about １ ／ of the thickness t1 of the double-sided offset slit ruled blade 11. It is formed so as to have a conical groove t4 of about 1/3.

As shown in FIG. 4D, the ruled line 41 formed on the front surface 44 of the sheet 40 by the double-sided offset slit ruled-blade 11 has a flat bottom 45 and the width W of the ruled line 41.
The projections 42 and 43 having a width W4 smaller than the width W1 of the ruled line 41 are provided intermittently in the length direction at offset (shifted) positions from the surface 44 to the bottom 45 in one direction.

The ruled line 41 formed on the surface 44 of the sheet 40 by such a double-sided offset slit ruled line blade 11
According to the method, since the bending force is dispersed on both sides of the projections 42 and 43 formed at the offset (shifted) positions, the elastic stress generated in the ruled line 41 is reduced, and the ruled line 4 is reduced.
1 can be reliably bent and the rebound due to bending is small, so the bent portion is large, for example, 90 to 180 degrees.
It is easy to bend and has no directivity of bending. For example, when bending in both directions, more flexible bending can be performed. Further, the curvature of both sides formed by the ruled line 41 is reduced, and Since the width 41 can be formed thick, it is possible to form a bent portion having a characteristic finish in appearance.

FIG. 5 is a view showing a case sheet on which ruled lines are formed, and FIG. 6 is a detailed view of the ruled lines and a perspective view of the case. As shown in FIG. 5, ruled lines 51 to 59 are formed at each bent portion of the sheet 50. Here, in particular, the ruled lines are formed only on the ruled lines 51 and 52 to be bent at 180 degrees shown by B in FIG. 5 using the single-sided slit ruled line blade 1 according to the present embodiment described above. This is because the most durable ruled line is required in the 180-degree bent portion. On the other hand, the ruled lines 53 to 59 of the other bent portions are applied to the 90-degree bent portion.

The ruled lines 53 to 59 of the other bent portions may be similarly formed by using the ruled line blade according to the present embodiment.

As shown in the detailed sectional view taken along line A5-A5 of FIG. 6A, two ruled lines 51 and 52
Are formed in parallel at predetermined intervals. The side surface 53 corresponds to the upper surface in FIG. Further, in FIG. 5, all of the ruled lines 53 to 59 of the other bent portions are formed on the upper surface in FIG. 5, similarly to the side surface 53 shown in FIG.

Further, as shown in FIG.
At the 180-degree bent portion of the sheet 50, the projection 60 of the ruled line 51 of the two ruled lines and the projection 61 of the ruled line 52
Are formed at positions facing each other.

FIG. 6C is a perspective view of the case 62 completed by bending each bent portion of the sheet 50.
The 90 formed vertically in the sheet 50 shown in FIG.
The ruled lines 56 to 59 of the bent portion are bent into a cylindrical shape having corners at four corners with the upper surface of FIG.

Further, similarly, the ruled line 55 of the 90-degree bent portion formed horizontally is bent so that one end of the cylindrical shape is closed with the upper surface of FIG. 5 facing outward.

Further, the ruled lines 54 and 53 of the 90-degree bent portion formed in the horizontal direction are similarly bent so that the upper end of FIG.

Finally, the ruled lines 51 and 52 of the 180-degree bent portion formed laterally in the portion B of FIG. 5 are similarly set with the upper surface of FIG. 5 being outside and the other end closed. Fold inwardly into the cylindrical shape so as to come into contact with 53.

In the completed case 62, the ruled lines 51 and 52 of the 180-degree bent portion formed laterally in the portion B in FIG. 5 are applied to the 180-degree bent portion at the upper end.

According to the ruled lines 51, 52 formed on the side surface 53 of the sheet 50 by such a single-sided slit ruled blade 1, the bending force is dispersed on one side with the protrusions 60, 61 as borders. Since the elastic stress generated at 52 is reduced, the bending can be reliably performed at the ruled lines 51 and 52, and the rebound due to the bending is small, the bending portion is large, for example, it is easy to be folded back to 90 to 180 degrees, and moreover, the constant bending is possible. For example, when performing bending in one direction, fixed bending can be performed. Further, the curvature of the surface formed by the ruled lines 51 and 52 can be reduced, and the ruled lines 51 and 52 can be formed thin. Therefore, the case 62 having a beautifully finished bent portion in appearance.
Can be formed.

The present invention is not limited to this, and the ruled lines 51 to 59 of each bent portion may be bent with the upper surface in FIG.

Further, the 180 formed laterally at the portion B in FIG.
An example is shown in which two ruled lines are formed on the ruled lines 51 and 52 of the bent portion using a single-sided slit ruled blade.
Another double-sided opposing slit ruled line blade 5 or double-sided offset slit ruled line blade 11 may be formed.

Further, the other double-sided opposing slit ruled blade 5 or the double-sided offset slit ruled blade 11 may be formed only on the ruled lines 53 and 54 at the other end where frequent bending is predicted.

The ruled lines 51, 52, 52 formed on the side surface 53 of the sheet 50 by such a double-sided opposed slit ruled line blade 5.
According to 53 and 54, the bending force is dispersed on both sides of the protrusion (32 and 33 in FIG. 3) formed at the opposing position, so that the elastic stress generated in the ruled lines 51, 52, 53 and 54. Is reduced, the bending can be surely performed at the ruled lines 51, 52, 53, and 54, and the rebound due to the bending is small. Therefore, the bending portion is large, for example, it is easy to be bent to 90 to 180 degrees, and further, there is no directionality of the bending. For example,
When bending is performed in both directions, flexible bending can be performed. Further, the curvature of both sides formed by the ruled lines 51, 52, 53, 54 is reduced, and the ruled lines 51, 5 are formed.
Since the thicknesses 2, 53, and 54 can be formed thick, it is possible to form the case 62 having a bent portion having a characteristic finish in appearance.

Further, according to the ruled lines 51, 52, 53, 54 formed on the side surface 53 of the sheet 50 by such a double-sided offset slit ruled line blade 11, a projection formed at an offset (displaced) position (FIG. 4 of 42, 4
Since the bending force is dispersed on both sides starting from 3), the elastic stress generated in the ruled lines 51, 52, 53, 54 decreases,
Can be reliably bent at the ruled lines 51, 52, 53, 54,
Since the rebound due to bending is small, the bent portion is large, for example, it is easy to be bent to 90 to 180 degrees, and moreover, it is possible to perform more flexible bending without bending direction, for example, when performing bending in both directions. ,
Further, the curvature of both sides formed by the ruled lines 51, 52, 53, 54 is reduced, and the ruled lines 51, 52, 53,
Since the width 54 can be made large, it is possible to form the case 62 having a bent portion having a characteristic finish in appearance.

As the above-mentioned sheet material, for example, polypropylene can be used.

By forming the ruled line according to the present embodiment on a sheet material, the sheet material can be bent without being influenced by the material of the sheet material.

[0054]

According to the present invention, there is provided a sheet material folding ruled blade having a flat cutting edge and a plate width, wherein the sheet material folding ruled line blade for forming a folding rule at a bent portion of the sheet material. Direction from the side to the tip of the blade,
Since slits shallower than the plate thickness are provided intermittently in the plate length direction, the regular type of commonly used plate-shaped ruled line blade with a blade at the tip, the tip of the edge from the side By simply forming the above-described slits, processing can be easily performed, and since the cutting edge has a flat portion, the durability can be improved, and further, the production cost can be easily reduced.

Further, in the above-described sheet material bending ruled line blade, the slits are provided at positions opposing each other on one side surface and the other side surface of the plate. On a plate-shaped ruled line blade having a cutting edge at the tip, on one side and the other side, it is possible to easily process simply by forming a slit at the above-described opposed position from the side surface to the tip of the cutting edge, and a flat portion on the cutting edge. This has the effect of improving durability and facilitating manufacturing costs.

In the sheet material folding ruled blade of the present invention, the slits are provided on one side and the other side of the plate at positions shifted from each other. The plate-shaped ruled line blade having a cutting edge at the tip can be easily processed simply by forming a slit at one of the above-described offset (shifted) positions from the side surface to the tip of the cutting edge on one and the other side surfaces. Since it has a flat portion, the durability can be improved, and the production cost can be reduced.

Further, according to the sheet material with a folding ruled line of the present invention, in the sheet material with a folding ruled line having a folding ruled line formed on the surface of a bent portion by a plate-like sheet material folding ruled line blade, the ruled line is a flat bottom portion. Since protrusions smaller than the width of the ruled line are intermittently provided in the length direction from the surface to the bottom in the width direction of the ruled line, the bending force is dispersed at the protrusions, so that the ruled line is generated. The elastic stress is reduced, the folding line can be reliably bent, and the rebound due to the bending is small, so the bending portion is large, for example, it is easy to be folded back to 90 degrees to 180 degrees, and has a certain bending direction, for example, When bending in one direction, fixed bending can be performed. Further, the curvature of the surface formed by the ruled line is reduced, and the ruled line can be formed thinly. An effect that it is possible to form the bent portion of the appearance beautiful finish.

Further, in the sheet material with folded creases of the present invention, the projections are provided on one side and the other side of the creases at positions facing each other. Since the bending force is dispersed on both sides, the elastic stress generated in the creases is reduced, and the creases can be reliably bent with less creases.
The bent portion is large, for example, easily bendable to 90 to 180 degrees, and has no directivity of bending, for example, can be flexibly bent when bending in both directions, and is formed by a ruled line. Since the curving of both sides is reduced and the ruled line can be formed thick, it is possible to form a bent portion having a finish that is characteristic in appearance.

In the sheet material with folded creases according to the present invention, the projections are formed on one side and the other side of the creases at positions offset from each other, so that they are formed at offset (shifted) positions. Since the bending force is dispersed on both sides of the projection, the elastic stress generated in the crease is reduced, the crease can be reliably bent by the crease, and the rebound due to the bending is small, so that the bending portion is enlarged, for example, 90
It is easy to bend to a degree of 180 degrees and has no directionality of bending, for example, more flexible bending can be performed when bending in both directions, and furthermore, the curvature of both sides formed by the ruled lines is reduced and Since the ruled line can be formed thick, it is possible to form a folded portion having a characteristic finish in appearance.

[Brief description of the drawings]

1 is an external perspective view showing a ruled line blade of the present embodiment, FIG. 1A is a single-sided slit ruled blade, FIG. 1B is a double-sided opposed slit ruled blade, and FIG.

FIG. 2 is a diagram showing the shape of a single-sided slit ruled blade and the shape of a ruled line; FIG.
2B is a front view of the single-sided slit ruled blade, FIG. 2C is a cross-sectional view of the single-sided slit ruled blade A1-A1, and FIG. 22 is a perspective view of the ruled line formed on the sheet by the single-sided slit ruled blade.

3A and 3B are diagrams showing the shape of a double-sided opposing slit ruled blade and the shape of a ruled line; FIG. 3A is a plan view of a double-sided opposing slit ruled blade; FIG. Is a sectional view taken along line A2-A2 of the double-sided opposing slit ruled blade, and FIG. 32 is a perspective view of a ruled line formed on a sheet by the double-sided opposing slit ruled blade.

4A and 4B are diagrams showing the shape of a double-sided offset slit ruled blade and the shape of a ruled line, FIG. 4A is a plan view of a double-sided offset slit ruled blade, FIG. 4A and 4B are cross-sectional views of the double-sided offset slit ruled line blade, and FIG. 4B is a perspective view of a ruled line formed on a sheet by the double-sided offset slit ruled blade.

FIG. 5 is a development view showing a case sheet on which ruled lines are formed.

6 is a detailed view of a ruled line and a perspective view of a case, FIG. 6A is a detailed cross-sectional view taken along line A5-A5 of FIG. 5, and FIG.
FIG. 6C is a perspective view of the case.

7A and 7B are views showing a conventional ruled line blade shape and a ruled line shape, FIG. 7A is a front view of the ruled line blade, FIG. 7B is a side view of the ruled line blade, and FIG. 7C is a perspective view of the ruled line. .

8A and 8B are diagrams showing another conventional ruled line blade shape and ruled line shape. FIG. 8A is a perspective view of the ruled line blade, and FIG. 8B is a perspective view of the ruled line.

9A and 9B are diagrams showing another conventional ruled line blade shape and ruled line shape. FIG. 9A is a side view of the ruled line blade, and FIG. 9B is a perspective view of the ruled line.

[Explanation of symbols]

1 ... single-sided slit ruled line blade, 2, 6, 12 ... cutting edge,
3, 7, 13 ... side surface, 4 ... (one side) slit, 5 ...
... double-sided slit ruled blade, 8, 10 ... (both sides facing) slit, 11 ... double-sided offset slit ruled blade, 14,
16 ... (double-sided offset) slits, 20, 30, 4
0 ... sheet, 21, 31, 41 ... ruled line, 22 ...
(Single-sided) projections, 23, 34, 44 ... surface, 24, 3
5, 45 ... bottom part, 31 ... ruled line, 32, 33 ... (two-sided facing) projection, 42, 43 ... (two-sided offset) projection, 50 ... sheet, 51-59 ... ruled line, 60, 61
... Projection, 62 ... Case

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuji Suzuki 5--19-12 Higashiikebukuro, Toshima-ku, Tokyo F-term Co., Ltd. F-term (reference) 3E075 BA02 CA01 DB03 DB17 DB22 GA02 3E078 AA13 DD11 4F209 NA02 NB01 NG02

Claims (6)

[Claims] 1. A plate-shaped sheet material folding ruled line blade for forming a folding ruled line in a bent portion of a sheet material, comprising: a flat blade edge;
A sheet material folding ruled line blade, wherein slits shallower than the plate-shaped plate thickness are provided intermittently in the length direction of the plate-shaped plate. 2. The sheet material folding ruled line blade according to claim 1, wherein the slits are provided at positions opposing each other on one side surface and the other side surface of the plate shape. blade. 3. The sheet material folding ruled line blade according to claim 1, wherein the slits are provided on one side surface and the other side surface of the plate shape at positions shifted from each other. blade. 4. A sheet material with a folding ruled line in which a folding ruled line is formed on the surface of a bent portion by a plate-shaped sheeting material folding ruled blade, wherein the ruled line has a flat bottom portion and a width direction of the ruled line. A projection having a width smaller than the width of the ruled line intermittently provided in the length direction from the surface to the bottom. 5. The sheet material with a folding ruled line according to claim 4, wherein the projections are provided at positions opposing each other on one side and the other side of the ruled line. 6. The sheet material with a folding ruled line according to claim 4, wherein the projections are provided on one side and the other side of the ruled line at positions shifted from each other.