JP2007326202A - Cutting device, cutting method, sheet-shaped substrate, and packing container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting device and the like, capable of making paper powders hard to jam in a sliding portion of a cutting edge when a sheet-shaped substrate is cut, suppressing the opening of the sliding portion of the cutting edge, and precisely forming a curved portion fitted with a container whose corners of a side surface are curved. <P>SOLUTION: The cutting device 10 cuts the sheet-shaped substrate 30 by the cutting edge. The cutting edge 13 slides with a straight line edge 18 linearly formed, and a curved edge 19 abutting on the straight edge 18 at an end portion. The cutting edge 13 solves the above mentioned problem by the cutting device 10 having projecting amount of 1. 5 to 3. 5mm to a cutting edge holding portion 12 holding the cutting edge 13. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cutting device, a cutting method, a sheet-like base material, and a packaging container.

  Generally, packaging containers such as cigarettes and confectionery are often used in a substantially rectangular parallelepiped shape. As a development of the packaging container having such a shape, a shape in which a part of the side (side) of the side surface of the container is curved (rounded) instead of a right angle is known. By curving the corners on the side surface of the container, the container can have a softer atmosphere, and the design of the container can be improved.

  By the way, it is known that a sheet-like base material such as the above packaging material is cut by a cutting device. As shown in FIGS. 8 and 9, the cutting blade 1 of this cutting apparatus is provided with a straight blade 2 at a rubbing portion and a bending blade 3 whose end abuts against the straight blade 2. 8 and FIG. 9, 2a and 3a have shown the blade edge | tip of the straight blade 2 and the bending blade 3, respectively.

  When a sheet-like base material is cut using such a cutting blade 1, the straight portion 5 cut directly on the base material 4 by the blade 2 and the bent blade 3 are cut as shown in FIG. 10. An obtuse angled bent portion 6 is formed.

  Therefore, the sheet-like base material 4 cut using the cutting blade 1 as shown in FIGS. 8 and 9 is formed in the container, and the obtuse bent portion 6 cut by the bending blade 3 is formed on the upper and lower sides of the container. When a part of the lid is used, the corners of the lids are chamfered, and it is impossible to deal with the container having the side corners curved as described above.

As another cutting apparatus, for example, the one disclosed in Patent Document 1 is known.
JP 2005-1075 A

  However, when a lid with a chamfered corner as described above is used as a lid of a container with a curved corner, a narrow gap is formed between the side and the lid, There is a problem that it is not compatible with a curved container.

  8 and 9, when the end of the curved blade is disposed so as to contact the straight blade 2 instead of the bending blade 3, the curved portion formed by the curved blade is the upper and lower lids of the container. In the case of a part of the lid, the corners of the lids are chamfered in a rounded shape, and can correspond to a container whose side corners are curved as described above.

  However, when the end of the curved blade is disposed so as to contact the straight blade 2, the rubbing portion of the cutting blade is clogged with paper dust, and the paper powder clogs in this way, thereby separating the straight blade from the curved blade. However, there is a problem that the cutting accuracy is lowered.

  Therefore, the present invention has been made in consideration of the above circumstances, and when cutting a sheet-like base material, the rubbing portion of the cutting blade is less likely to be clogged, and the rubbing portion of the cutting blade opens. A cutting device and a cutting method capable of accurately forming a curved portion adapted to a container having curved side corners, a cut sheet-like base material, and a sheet-like base material formed from the sheet-like base material. The purpose is to provide a packaging container.

  The cutting device according to claim 1 for solving the above-mentioned problem is a cutting device that cuts a sheet-like substrate with a cutting blade, and the cutting blade includes a straight blade formed in a straight line; A curved blade whose end abuts against the straight blade is rubbed together, and the cutting blade has a projection amount of 1.5 to 3.5 mm with respect to the cutting blade holding portion that holds the cutting blade. .

  According to the invention described in claim 1, the cutting blade is formed by rubbing a straight blade formed in a straight line and a curved blade whose end abuts against the straight blade. By setting the projection amount to the cutting blade holder to be held to 1.5 to 3.5 mm, when cutting a sheet-like base material, a curved part that fits a container with a curved corner is accurately formed. can do.

  In addition, by making the protrusion amount of the cutting blade with respect to the cutting blade holding portion 1.5 to 3.5 mm, paper dust is less likely to clog the rubbing portion of the cutting blade, and the protrusion amount is small and the rigidity is increased. It is possible to prevent an increase in the distance between the straight blade and the curved blade, and it is possible to always perform an accurate cutting operation without reducing the cutting accuracy.

  By the way, on the surface of the cutting blade holding part around the cutting blade, a thin rubber is stuck to improve the peelability of the cut sheet-like substrate.

  Therefore, when the protruding amount of the cutting blade with respect to the cutting blade holding portion is less than 1.5, cutting cannot be performed or even if it can be cut, punching is performed against the elasticity of the rubber. There is a problem that the punching pressure increases. In addition, when the protruding amount of the cutting blade with respect to the cutting blade holding portion exceeds 3.5 mm, the cutting blade rubbing portion is clogged with paper dust when cutting, and the protruding amount is large and the rigidity is low. The swinging and opening sheet-like base material cannot be cut stably.

  The cutting device according to claim 2 is characterized in that, in the cutting device according to claim 1, the cutting edge at the end of the curved blade is arranged close to the cutting edge of the straight blade.

  According to the invention described in claim 2, when the sheet-like base material is cut by arranging the cutting edge at the end of the curved blade close to the cutting edge of the straight blade, the straight line cut directly by the blade. It is possible to eliminate the cut portion of the portion, and to form an accurate straight portion and a curved portion on the sheet-like base material.

  The cutting method according to claim 3 is a cutting method for cutting a sheet-like base material with a cutting blade, and a straight blade formed in a straight line and a curved blade whose end abuts against the straight blade. The cutting blade and the sheet-like base material are relatively moved by using a cutting blade which is rubbed together and has a projection amount with respect to the cutting blade holding portion of 1.5 to 3.5 mm. Is cut by the cutting blade.

  According to the cutting method described in claim 3, the straight blade formed in a straight line and the curved blade whose end abuts against the straight blade are rubbed together, and the protrusion amount with respect to the cutting blade holding portion is 1. Using a cutting blade having a thickness of 5 to 3.5 mm, the cutting blade and the sheet-like base material were relatively moved, and the sheet-like base material was cut by the cutting blade to cut the sheet-like base material. At the same time, paper dust is less likely to clog the rubbing part of the cutting blade, and since the amount of protrusion is small and rigidity is increased, it is possible to prevent an increase in the distance between the straight blade and the curved blade. A curved portion that fits into a container with a curved corner can be accurately formed.

  The sheet-like substrate according to claim 4 is a cut sheet-like substrate, and a straight blade formed in a straight line and a curved blade whose end abuts against the straight blade are rubbed together. In addition, a cutting blade having a projection amount with respect to the cutting blade holding portion of 1.5 to 3.5 mm is used, and the cutting blade is moved relative to the cutting blade and cut by the cutting blade.

  According to the sheet-like base material according to claim 4, the straight blade formed in a straight line and the curved blade whose end abuts against the straight blade are rubbed together, and the protruding amount with respect to the cutting blade holding portion Using a cutting blade with a thickness of 1.5 to 3.5 mm, the cutting blade and the sheet-like base material are relatively moved, and cutting with the cutting blade causes paper dust to be clogged in the rubbing portion of the cutting blade. Since it becomes difficult and the rigidity is increased with a small amount of protrusion, it is possible to suppress the cutting blade from swinging and opening, and to accurately form a curved portion suitable for a container having curved side corners.

  The packaging container according to claim 5 is formed in a substantially square box shape by curving the side corners from the sheet-like base material according to claim 4, and a curved portion is formed at the corners of the upper and lower lids. It is characterized by that.

  According to the packaging container of the fifth aspect, the corners of the side surfaces are curved without forming a gap between the side surfaces and the lid by forming the curved portions at the corners of the upper and lower lids. Can fit into container.

  According to the cutting apparatus according to the present invention, the cutting blade is formed by rubbing a straight blade formed in a straight line with a curved blade whose end abuts against the straight blade, and the cutting blade holds the cutting blade. By setting the protrusion amount to the cutting blade holding portion to be 1.5 to 3.5 mm, when the sheet-like base material is cut, a curved portion that fits a container whose side corners are curved is accurately formed. be able to.

  Moreover, since the protrusion amount of the cutting blade with respect to the cutting blade holding portion is 1.5 to 3.5 mm, the cutting blade is less likely to be clogged with paper dust, and the protrusion amount is small and the rigidity is increased. It is possible to prevent an increase in the distance from the blade, and it is possible to always perform an accurate cutting operation without reducing the cutting accuracy. The same effect can be obtained by the cutting method and the sheet-like substrate according to the present invention.

  Furthermore, according to the packaging container according to the present invention, the corners of the side surfaces are curved without forming a gap between the side surfaces and the lids by forming the curved portions at the corners of the upper and lower lids. Can fit into container.

  Hereinafter, a cutting apparatus, a cutting method, a sheet-like base material, and a packaging container according to an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a schematic view showing a first embodiment of a cutting apparatus according to the present invention, FIG. 2 is an enlarged plan view showing a first cutting blade of the cutting apparatus of FIG. 1, and FIG. 4 is a developed view showing a sheet-like base material cut according to the present embodiment, and FIG. 5 is a perspective view showing a packaging container made from the sheet-like base material of FIG.

  As shown in FIG. 1, a cutting device 10 for cutting (die-cutting) a sheet-like base material 30 of this embodiment is fixed to a base 11 having a predetermined height and a horizontal state on the base 11. The cutting blade holding part 12, the cutting blade 13 held by the cutting blade holding part 12, the substrate placing part 14 for placing the sheet-like substrate 30 in a horizontal state, and the sheet-like substrate 30 Is provided with a vertical driving mechanism 15 as a moving means for moving the base material mounting portion 14 on which is mounted vertically as indicated by an arrow.

  The cutting blade 13 includes a first cutting blade 16 disposed in the rubbing portion and a second cutting blade 17 disposed other than the first cutting blade 16.

  In addition, in this embodiment, although the base-material mounting part 14 in which the sheet-like base material 30 was mounted was moved up and down, the cutting blade holding | maintenance part 12 with which the cutting blade 13 was hold | maintained was moved up and down. Alternatively, both the cutting blade holding part 12 and the substrate mounting part 14 may be moved up and down. That is, the cutting blade 13 and the sheet-like base material 30 may be relatively moved so that both are pressed and the sheet-like base material 30 is cut by the cutting blade 13.

  Both the first cutting blade 16 and the second cutting blade 17 are projected linearly, the protruding amount with respect to the cutting blade holding portion 12 is defined the same, and the thickness of the cutting blade holding portion 12 is 21 mm. And the 1st cutting blade 16 has the linear blade 18 formed in linear form as shown in FIG.2 and FIG.3, and the curved blade 19 in which an edge part contact | abuts to this linear blade 18, The linear blade 18 The curved blade 19 is provided so as to be rubbed. Reference numerals 18a and 19a denote cutting edges of the straight blade 18 and the curved blade 19, respectively.

  Here, the thickness of the cutting blade holding portion 12 is usually 18 mm, but is 21 mm in the present embodiment. When the thickness of the cutting blade holding portion 12 is 18 mm, the amount of protrusion of the straight blade 18 and the curved blade 19 with respect to the cutting blade holding portion 12 increases, and paper dust is applied to the rubbing portion between the straight blade 18 and the curved blade 19. The cutting blade is easy to open due to clogging. Such a problem appears remarkably in the rubbing portion between the straight blade 18 and the curved blade 19.

  On the other hand, when the thickness of the cutting blade holding portion 12 is 21 mm as in the present embodiment, the protruding amount of the straight blade 18 and the curved blade 19 with respect to the cutting blade holding portion 12 is reduced, and the straight blade 18 and the curved blade Since paper dust is less likely to clog the rubbed part 19 and the amount of protrusion is small and the rigidity is increased, it is possible to prevent an increase in the distance between the straight blade 18 and the curved blade 19.

  The thickness of the straight blade 18 is normally about 0.45 to 1.00 mm, preferably about 0.7 mm. The thickness of the curved blade 19 is usually about 0.45 to 1.00 mm, preferably about 0.7 mm, and the radius of curvature is about 2 to 10 mm. Furthermore, the protruding amount of the straight blade 18 and the curved blade 19 is normally 2.6 mm, and preferably in the range of 1.5 to 3.5 mm.

  The materials of the straight blade 18 and the curved blade 19 are not limited as long as they have a hardness suitable for cutting the base material 30 to be used, and the same type of material may be used, or different types of materials. From the viewpoint of durability, for example, iron or the like is used.

  Further, the cutting blade holding unit 12 in FIG. 1 moves the sheet-like substrate 30 placed on the substrate placing unit 14 up and down by the up-and-down drive mechanism 15 as indicated by the arrow in FIG. When the substrate 30 is cut with the first cutting blade 16 and the second cutting blade 17, the first cutting blade 16 and the second cutting blade 17 are held.

  The base material placing portion 14 in FIG. 1 is not particularly limited as long as at least the base material 30 is placed and can be cut, but a positioning member for positioning the base material 30 at a predetermined position. 14a etc. may be provided. It is desirable that the base material placement unit 14 has a transport mechanism that can transport the base material 30.

  In addition, as a condition for performing the cutting process by the cutting device 10, the base material 30 is placed on the base material placement portion 14 with the surface (outer side) of the base material 30 facing upward when it is normally printed and becomes a packaging container. Be transported. This is because it is easy to align the position where the base material 30 is cut when viewed from the top, and the broken line used when assembling the packaging container described later is formed from above.

  In addition, such a cutting device 10 may be provided as a part of component which comprises the content filling machine of packaging containers 40, such as a tobacco and a confectionery.

Although it will not specifically limit if the base material 30 of this embodiment is a sheet form, The sheet | seat of paper material is mainly used. Coated balls, card paper, ivory or the like is used as the paper material for the base material 30. The weighed value is about 190 to 400 g / m ² and the thickness is about 200 to 550 μm. As another material of the base material 30, a plastic material, processed paper, etc. can also be used. As the base material 30, a material such as a seed paper or the like printed with a picture or a quality indication of contents is used. The base material 30 is usually a single sheet-like material.

  Further, as shown in FIG. 4, the sheet-like substrate 30 is formed by embossing a plurality of linear recesses 31 arranged in parallel on one side, and a linear recess (not shown) is formed on the back surface thereof. It is formed by arranging a plurality of substantially parallel. The sheet-like base material 30 is printed with characters such as a picture and a quality display of the contents.

  In this way, characters such as the quality indication of the pattern and contents are printed, and the embossed sheet-like base material 30 is cut as follows.

  First, the sheet-like base material 30 is transported to and placed on the base material placement unit 14 by a transport mechanism (not shown) with the surface (outer side) facing up when printed to form a packaging container. Then, it is positioned at a predetermined position by the positioning member 14a. That is, the sheet-like base material 30 placed on the base material placement unit 14 is disposed directly below the first cutting blade 16 and the second cutting blade 17.

  Next, the base material placement part 14 on which the sheet-like base material 30 is placed is moved up and down by the vertical drive mechanism 15 as indicated by the arrow in FIG. 1. At this time, the base material placement part 14 is placed on the base material placement part 14. The sheet-like base material 30 thus formed is pressed against the first cutting blade 16 and the second cutting blade 17 and cut. Such a cutting operation is repeatedly performed.

  The cut sheet-like base material 30 is transported by a transport mechanism (not shown) in the next assembly process.

  In this assembling process, the sheet-like base material 30 cut as described above is folded at a predetermined position along a broken line or the like provided elsewhere, and the predetermined position is attached, as shown in FIG. It is assembled into the packaging container 40.

  In the following description, as shown in FIGS. 4 and 5, the side having the bottom plate 35 with respect to the lower front plate 34 in the packaging container 40 (base material 30) is the lower side, and in this state, the lower front plate When viewing 34, the left side is the left side, and the right side is the right side.

  Specifically, as shown in FIG. 4, the base material 30 includes a lower front plate 34, a bottom plate 35 connected to the lower front plate 34 via a fold line a, and a fold line to the bottom plate 35. a back plate 36 connected to the lower side through b, an upper plate 37 connected to the back plate 36 through a broken line c, and a lower plate connected to the upper plate 37 through a bent line d. An upper front plate 38 and an opening piece 39 bonded to the upper side (outer side) of the lower front plate 34. Here, the lower front plate 34 and the rear plate 36 are formed with embossed inclined protrusions 31.

  A lower front left piece 34a and a lower front right piece 34b are connected to the lower front plate 34 via recessed portions 31 separately embossed on both sides thereof. The back plate 36 is connected with a back left piece 36a and a back right piece 36b via recesses 31 embossed on both sides thereof. Further, an upper front left piece 38a and an upper front right piece 38b are connected to the upper front plate 38 via recesses 31 separately embossed on both sides thereof. Among these, the back left side piece 36a of the back plate 36 has an upper left flap 36c and a lower left flap 36d above and below, and the back right side piece 36b of the back plate 36 has an upper right flap 36e and a lower right flap 36f connected to the upper and lower sides. Yes.

  The substrate 30 is folded along the respective folding lines a to d, the respective concave portions 31 are bent along a straight line, the flaps 36c, 36d, 36e and 36f are folded, the flaps 36c and 36e are bonded to the bottom plate 35, and the flaps 36d and 36f Is bonded to the upper surface plate 37. Then, the lower front left piece 34 a of the lower front plate 34 and the upper front left piece 38 a of the upper front plate 38 are bonded to the rear left piece 36 a of the rear plate 36, and the lower front plate 34 is attached to the rear right piece 36 b of the rear plate 36. By bonding the lower front right piece 34b and the upper front right piece 38b of the upper front plate 38, the packaging container 40 shown in FIG. 5 is completed. At this time, conventionally known adhesives are used for the above-described bonding.

  On the upper side of the lower front plate 34, a broken line-like substantially U-shaped cutting line 34d is provided, and an opening piece 39 is bonded to a portion surrounded by the cutting line 34d. Then, when the user opens the packaging container 40, the opening piece 39 is peeled off from the lower front plate 34, whereby the cutting line 34 is cut off, and the lower front plate 34 surrounded by the cutting line 34d is opened. It is easy to open the packaging container 40, and it can be seen at a glance whether or not the packaging container 40 has been opened once. In addition, cutting lines 36g and 36h are provided on the rear right side piece 36a and the rear left side piece 36b of the rear plate 36 so that the piece 41 having the upper front plate 38 can be opened in the packaging container 40. When the packaging container 40 is opened, the fold line 36i connecting the cutting lines 36g and 36h is folded, and the user can take out the contents of the packaging container 40.

  Here, since the plurality of concave portions 31 are bent with a curve, the bottom plate 35 and the top plate 37 are not rectangular but have rounded corners corresponding to this. That is, curved portions 35 a and 37 a are formed at the corners of the bottom plate 35 and the top plate 37, respectively, and the curved portions 35 a and 37 a are cut by the curved blade 19.

  Further, on the extension line of the fold line a between the lower front plate 34 and the bottom plate 35, on the extension line of the fold line b between the bottom plate 35 and the back plate 36, on the extension line of the fold line c between the back plate 36 and the top plate 37, and on the top plate 37. Straight lines 34c, 36j, 36k, and 38c are formed on extensions of the broken line d between the upper front plate 38 and the upper front plate 38, respectively. These straight portions 34c, 36j, 36k, and 38c are cut by the straight blade 18, respectively.

  As shown in FIG. 5, the packaging container 40 after assembling the base material 30 cut by the above-described method is generally formed in a substantially rectangular parallelepiped shape, and its side corners are curved by a plurality of recesses 31. The curved portions 35a and 37a are formed on the bottom plate 35 and the top plate 37 corresponding to the curvature of the curved portion. Accordingly, the lower front plate 34, the lower front left piece 34a and the lower front right piece 34b, the rear plate 36, the rear left piece 36a and the rear right piece 36b, the upper front plate 38, the upper front left piece 38a and the upper front right piece 38b. Between the side surface formed from the bottom plate 35 and the top plate 37, a predetermined position was bonded in a state where a plurality of linearly embossed portions were curved without forming a gap. Can fit into container.

  In addition, the ratio of each edge | side in case the packaging container 40 becomes a substantially rectangular parallelepiped shape is not specifically limited, It sets suitably according to a use. Although the size of the packaging container 40 is not particularly limited, as shown in FIG. 5, if each side of the rectangular parallelepiped is L3, W3, and H3, the length L3 is usually about 10 to 100 mm, and the width W3: About 50 to 200 mm and height H3: about 50 to 200 mm. Moreover, when cigarette the contents of the packaging container 40, it is preferable that the size is about L3: about 15-25 mm, W3: about 50-60 mm, and H3: about 85-110 mm.

  Next, the operation and effect of the cutting apparatus of this embodiment will be described.

  By the way, normally, the thickness of the cutting blade holding part is 18 mm, and a narrow gap is formed between the straight blade and the curved blade. Therefore, when about 500 sheet-like base materials 30 are cut, Paper dust is clogged in a narrow gap. If cutting is performed in a state where the paper dust is accumulated, the interval between the straight blade and the curved blade gradually increases.

  Therefore, in this embodiment, the thickness of the cutting blade holding portion 12 is 21 mm, and the protruding amount of the first cutting blade 16 including the straight blade 18 and the curved blade 19 is about 1.5 to 3.5 mm. Since it is 6 mm, the volume of the narrow gap 20 shown in FIG. 3 can be reduced. As a result, the amount of paper dust jammed in the narrow gap 20 can be reduced, and the amount of protrusion of the first cutting blade 16 is small and the rigidity is increased, so that the interval between the straight blade 18 and the curved blade 19 is widened. Can be prevented in advance, and accurate cutting can always be performed without reducing cutting accuracy.

  As described above, according to the cutting device 10 and the cutting method of the present embodiment, the first cutting blade 16 includes the straight blade 18 formed in a straight line and the curved blade 19 whose end abuts against the straight blade 18. The first cutting blade 16 has a projection amount of 2.6 mm with respect to the cutting blade holding portion 12 that holds the first cutting blade 16, and the first cutting blade 16 and the sheet-like base material 30 are relatively moved. By moving and cutting the sheet-like base material 30, when the sheet-like base material 30 is cut, the curved portions 34a and 37a that are suitable for the packaging container 40 whose side corners are curved are accurately obtained. Can be formed.

  Further, since the protruding amount of the first cutting blade 16 with respect to the cutting blade holding portion 12 is set to 2.6 mm, it is difficult for paper dust to be clogged in the rubbing portion of the first cutting blade 16 and the first cutting blade 16 protrudes. Since the amount is small and the rigidity is increased, it is possible to prevent the interval between the straight blade 18 and the curved blade 19 from expanding, and it is possible to always perform an accurate cutting operation without reducing the cutting accuracy. In addition, in this embodiment, although the protrusion amount of the 1st cutting blade 16 was 2.6 mm, if the protrusion amount is in the range of 1.5-3.5 mm, the same effect | action and effect will be acquired.

  Furthermore, when the sheet-like base material 30 is cut by the cutting device 10 and the cutting method according to the present embodiment, it is possible to cut the cigarette base material that requires high-precision cutting work.

(Second Embodiment)
FIG. 6 is an enlarged plan view showing the first cutting blade of the cutting apparatus according to the present invention, and FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. In addition, the same code | symbol is attached | subjected to the part which is the same as that of the said 1st Embodiment, or it overlaps, and the overlapping description is abbreviate | omitted. Moreover, since the configuration of the cutting apparatus is the same as that of the first embodiment, the description thereof is omitted.

  As shown in FIG. 6, both the first cutting blade 16 </ b> A and the second cutting blade 17 are projected linearly, the amount of projection with respect to the cutting blade holding portion 15 is defined to be the same, and the thickness of the cutting blade holding portion 12 is determined. Is 21 mm.

  Further, the first cutting blade 16A has a straight blade 18A formed linearly as shown in FIGS. 6 and 7, and a curved blade 19A whose end abuts against the straight blade 18A. Reference numerals 18a and 19a denote the cutting edges of the straight blade 18A and the curved blade 19A, respectively.

  The thickness of the straight blade 18A12A is 0.71 mm, and a cutout portion 19b is formed in the straight blade 18A at a portion where the curved blade 19A abuts. The notch 19b is notched with a width of 0.20 mm. Therefore, the blade edge 19a at the end of the curved blade 19A is disposed close to the blade edge 12a of the straight blade 12A.

  As described above, according to the cutting device of the present embodiment, the cutting edge 19a at the end of the curved blade 19A is disposed close to the cutting edge 18a of the linear blade 18A, and therefore when the sheet-like base material 30 is cut. In addition, the cut portion of the straight portion cut directly by the blade 18A can be eliminated, and an accurate straight portion and a curved portion can be formed on the sheet-like substrate 30. Other configurations, operations, and effects are the same as those in the first embodiment, and thus description thereof is omitted. Moreover, the sheet-like base material 30 cut by the cutting device of the present embodiment and the packaging container 40 assembled from the sheet-like base material 30 are substantially the same.

  The present invention is not limited to the above embodiments, and various modifications can be made. For example, in each of the above embodiments, the straight blade and the curved blade of the first cutting blade each having a tapered tip are used. However, the present invention is not limited to this, and the straight blade and the curved blade formed in a wedge shape are used. May be used.

It is the schematic which shows 1st Embodiment of the cutting device which concerns on this invention. It is an enlarged plan view which shows the 1st cutting blade of the cutting apparatus of FIG. It is sectional drawing by the III-III line of FIG. It is an expanded view which shows the sheet-like base material cut by this embodiment. It is a perspective view which shows the packaging container produced from the sheet-like base material of FIG. It is an enlarged plan view which shows the 1st cutting blade of 2nd Embodiment of the cutting apparatus which concerns on this invention. It is sectional drawing by the VII-VII line of FIG. It is an enlarged plan view which shows the cutting blade of the conventional cutting apparatus. It is sectional drawing by the IX-IX line of FIG. It is a fragmentary top view which shows the sheet-like base material cut | judged with the cutting blade of the conventional cutting apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Sheet-like base material cutting device 11 Base 12 Cutting blade holding part 13 Cutting blade 14 Base material mounting part 2nd cutting blade 15 Vertical drive mechanism cutting blade holding part 16 1st cutting blade 17 2nd cutting blade 18 Straight line Blade 19 Curved blade 20 Narrow gap 30 Sheet-like base material 34c, 36j, 36k, 38c Straight portion 35 Bottom plate 35a, 37a Curved portion 37 Top plate 40 Packaging container

Claims (5)

A cutting apparatus for cutting a sheet-like base material with a cutting blade,
The cutting blade is rubbed with a straight blade formed in a straight line and a curved blade whose end abuts against the straight blade,
The cutting device is characterized in that a protruding amount with respect to the cutting blade holding portion that holds the cutting blade is 1.5 to 3.5 mm. The cutting apparatus according to claim 1,
A cutting apparatus, wherein a cutting edge at an end of the curved blade is disposed close to a cutting edge of the straight blade. A cutting method of cutting a sheet-like substrate with a cutting blade,
A straight blade formed in a straight line and a curved blade whose end abuts against this straight blade are rubbed together, and using a cutting blade with a projection amount with respect to the cutting blade holding portion of 1.5 to 3.5 mm,
A cutting method, wherein the cutting blade and the sheet-like base material are relatively moved, and the sheet-like base material is cut by the cutting blade. A cut sheet-like base material,
A straight blade formed in a straight line and a curved blade whose end abuts against this straight blade are rubbed together, and using a cutting blade with a projection amount with respect to the cutting blade holding portion of 1.5 to 3.5 mm,
A sheet-like substrate that is moved relative to the cutting blade and cut by the cutting blade.   5. A packaging container comprising a sheet-like base material according to claim 4, wherein the side corners are curved to form a substantially square box, and the curved portions are formed at the corners of the upper and lower lids.

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