WO2020188899A1 - Cutting blade and packaging container - Google Patents
Cutting blade and packaging container Download PDFInfo
- Publication number
- WO2020188899A1 WO2020188899A1 PCT/JP2019/047022 JP2019047022W WO2020188899A1 WO 2020188899 A1 WO2020188899 A1 WO 2020188899A1 JP 2019047022 W JP2019047022 W JP 2019047022W WO 2020188899 A1 WO2020188899 A1 WO 2020188899A1
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- tooth
- teeth
- area
- adjacent
- cutting blade
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/38—Devices for discharging contents
- B65D25/52—Devices for discharging successive articles or portions of contents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/42—Details of containers or of foldable or erectable container blanks
- B65D5/72—Contents-dispensing means
Definitions
- the present invention relates to a cutting blade and a packaging container.
- the packaging container usually has a storage box for storing the package and a saw-shaped cutting blade in which a plurality of teeth are arranged for cutting the package drawn from the storage box in a used amount. ..
- the storage box has a main body of a substantially rectangular parallelepiped having one surface as an opening surface and a lid portion for opening and closing the opening surface, and the cutting blade is arranged on an end side of the lid portion.
- the upper direction in the drawing is the tooth whose tip does not face outward and faces the bottom of the packaging container when the lid is closed.
- a packaging container having a cutting blade that facilitates cutting from the widthwise end by arranging (hereinafter, also simply referred to as "upward teeth”) because it faces.
- the package cut by the reverse rotation of the wound package is rewound inside the main body, and the end portion of the package is placed on the surface of the wound package. It may stick. Then, when the end portion that has been stuck is restored between the main body portion and the lid portion (hereinafter, also simply referred to as "recovery time"), the package is torn (vertically torn) in the winding direction. ) Is known to occur.
- the mechanism of action that causes longitudinal tears is thought to be as follows. That is, when the tips of adjacent teeth are pierced into the package and the breaks to the package initiated by the respective tips merge, the breaks initiated by one of the adjacent teeth are excessive. A notch (crack) is generated at the confluence of fractures. Then, when the stress applied to the package due to peeling from the wound package or the like is concentrated on the notch, a new fracture starting from the notch progresses and a vertical tear occurs. ..
- Patent Document 3 describes a cutting blade in which a plurality of teeth having different tooth heights are alternately arranged and the hypotenuses of adjacent teeth are connected by an arc.
- the distance between the point where the extension lines of the facing diagonal sides intersect and the arc is defined as a "smooth distance”
- the tooth height is the same as the point where the extension lines of the facing diagonal sides intersect.
- the cutting blade described in Patent Document 3 does not completely suppress the occurrence of tearing in the package at the time of restoration, and the packaging at the time of rewinding. Sometimes it was difficult to recover so that the body would not tear.
- the present invention has been made in view of the above problems, and a cutting blade capable of easily cutting a package from both the center and the end in the width direction and easily recovering at the time of rewinding, and the cutting blade.
- the purpose is to provide a packaging container that has.
- the cutting blade has a central area in which a plurality of teeth are arranged and a pair of external areas in which a plurality of teeth are arranged outside the central area, and the tooth tips are outside only in the external area.
- the hypotenuse on the outside of the outward tooth and the hypotenuse on the inside of the adjacent tooth arranged adjacent to the outside of the outward tooth are connected by an arc, and the radius of curvature (R1) of the arc is 0.3 mm or more. It is 1.3 mm or less.
- Another aspect of the present invention relates to a packaging container having a storage box for storing a roll-shaped package and a cutting blade for cutting the package pulled out from the storage box.
- the present invention provides a cutting blade that makes it easy to cut a package from both the center and the end in the width direction and that makes it easy to recover when rewinding, and a packaging container having the cutting blade.
- FIG. 1 is a perspective view schematically showing a configuration of a packaging container according to an embodiment of the present invention when the lid is closed.
- FIG. 2 is a perspective view when the lid is opened, schematically showing the configuration of the packaging container according to the embodiment of the present invention.
- FIG. 3 is a front view showing a schematic configuration of a cutting blade according to an embodiment of the present invention.
- FIG. 4 is a partially enlarged view of a region X in FIG. 3, showing the teeth constituting the central area of the cutting blade according to the embodiment of the present invention.
- FIG. 5 is a partially enlarged view of region Y in FIG. 3, showing the teeth constituting the side area of the cutting blade according to the embodiment of the present invention.
- FIG. 6 is a partially enlarged view of a region Z in FIG.
- FIG. 7 is a front view showing a schematic configuration of a cutting blade according to another embodiment of the present invention.
- FIG. 8 is a partially enlarged view of the region S in FIG. 7, showing the teeth constituting the vicinity of the boundary between the central area and the side area (side connection region) of the cutting blade according to another embodiment of the present invention.
- FIG. 9 is a partially enlarged view of the region T in FIG. 7, showing the teeth constituting the vicinity of the boundary between the side connection region and the side main region of the cutting blade according to another embodiment of the present invention.
- FIG. 10 is a partially enlarged view of the region U in FIG.
- FIG. 11 is a perspective view when the lid is closed, schematically showing the configuration of the packaging container according to another embodiment of the present invention.
- FIG. 12 is a perspective view when the lid is closed, schematically showing the configuration of the packaging container according to still another embodiment of the present invention.
- FIG. 1 is a perspective view schematically showing the configuration of the packaging container 10 according to the embodiment of the present invention when the lid is closed
- FIG. 2 is a lid schematically showing the configuration of the packaging container 10. It is a perspective view when the part is opened.
- the packaging container 10 has a storage box 100 for retractably storing a package 50 formed by winding a long packaging film or the like around a winding core in a roll shape, and a cutting blade 200.
- the storage box 100 has a main body 110 that houses the package 50, and a lid 120 that is rotatably connected to the main body 110.
- the main body 110 and the lid 120 are integrally formed by bending a sheet of cardboard.
- the "width direction” is a direction along the winding axis of the wound package, and means a direction in which the winding core of the package extends.
- the "winding direction” means a direction orthogonal to the width direction in the package and a direction approaching the winding core from the end side drawn out during use.
- the "end” means the end in the width direction of the cutting blade
- the “outside” means the direction of the cutting blade from the central side to the end side in the direction in which the teeth are arranged.
- “inside” means the direction from the end side to the center side in the direction in which the teeth are arranged in the cutting blade.
- the "upper end” means the ends of the front plate 114 and the rear plate 116 on the opposite side of the bottom plate 118, and the “both ends” mean that the front plate 114 faces the front. It means the left and right ends of each member constituting the packaging container when the packaging container 10 is arranged.
- the main body 110 has a pair of end plates 112a and 112b, a front plate 114 and a rear plate 116, and a bottom plate 118.
- the main body 110 has a substantially rectangular parallelepiped shape formed by refracting the end plates 112a and 112b, and the front plate 114 and the rear plate 116 arranged around the bottom plate 118 in the developed view in the same direction with respect to the bottom plate 118. It is a box body.
- the main body 110 has an opening surface 119 on the upper surface side facing the bottom plate 118.
- the lid portion 120 is rotatably connected to the rear plate 116 along the connecting portion 128 with the rear plate 116 by refracting the extending portion extending from the upper end of the rear plate 116 toward the front plate 114.
- the lid 120 has a lid plate 122, a lid piece 124, and a pair of side lid pieces 126a and 126b.
- the lid portion 120 is formed by refracting the lid piece 124 and the side lid pieces 126a and 126b arranged around the lid plate 122 in the developed view in the same direction with respect to the lid plate 122.
- the lid plate 122 is a substantially rectangular plate-shaped member having substantially the same shape and size as the opening surface 119, and opens and closes the opening surface 119 by rotating along the connecting portion 128.
- the lid piece 124 is connected to the lid plate 122 by refracting the extending portion extending from the front end of the lid plate 122 toward the bottom plate 118 when the lid plate 122 closes the opening surface 119. It is a formed plate-shaped member, and is arranged at a position where the lid plate 122 covers the upper end side region of the front plate 114 when the opening surface 119 is closed.
- the lid piece 124 has a shape in which the length from the front end of the lid plate 122 to the tip 125a of the lid plate 124 increases from both ends of the front end of the lid plate 122 toward the center.
- the tip 125 of the cover piece 124 has a substantially V shape facing the bottom plate 118 when the lid plate 122 closes the opening surface 119 and the cover piece 124 covers the front plate 114.
- the length from the front end to the tip 125a of the lid piece 124 at the central portion of the front end of the lid plate 122 is approximately 3/4 of the length of the short side of the front plate 114
- the lid plate It has a shape such that the length from the front end to the tip 125b of the lid piece 124 at the end of the front end of 122 is approximately 1 ⁇ 2 of the length of the short side of the front plate 114.
- the cutting blade 200 is a cutting blade having a substantially V shape that is substantially the same as the tip 125 of the lid piece 124, and is the tip of the lid piece 124 by ultrasonic bonding, for example, through a sealant and an adhesive. It is arranged so as to be bonded along the longitudinal direction at a position on the inner surface side of 125.
- the packaging container 10 is stored with the lid 120 closing the opening surface 119 and the lid piece 124 facing the front plate 114 and covering the front plate 114.
- the tip of the package 50 housed in the main body 110 is pulled out from the opening surface 119 and comes into contact with the front plate 114.
- the user of the package 50 grasps the tip of the packaging film or the like which is the package 50 with the lid 120 slightly opened, draws out only the amount used, closes the lid 120, and cuts the blade. Cut the package 50 by 200.
- the packaging container 10 is rotated downward to move the packaging film or the like, which is the package 50, to the center thereof.
- the widthwise end of the drawn package 50 is gripped and the gripped widthwise end is twisted upward with respect to the storage box 100, or the gripped accommodation corresponding to the widthwise end.
- the packaging film or the like, which is the package 50 can be cut from the widthwise end by the cutting blade 200 (end cut).
- FIG. 3 is a front view showing a schematic configuration of the cutting blade 200 according to the present embodiment.
- the cutting blade 200 has a plurality of teeth arranged in the upper region of the cutting blade 200 in FIG. 3, and is adhered to a position where the lower region of the cutting blade 200 in FIG. 3 is the inner surface side of the tip 125 of the lid piece 124.
- the plurality of teeth are arranged so as to slightly protrude from the tip 125.
- the cutting blade 200 includes a central area 210, a pair of side areas 220 arranged outside the central area 210, and a pair of end areas 230 arranged at the ends of the cutting blade 200 outside the side area 220.
- a plurality of teeth are arranged in each of the central area 210, the side area 220, and the end area 230.
- the central area 210 is in the range of 5 to 20% of the total width in the width direction of the cutting blade 200
- the side area 220 is the outer side of the cutting blade 200 of the cutting blade 200.
- the end area 230 is in the range of 10 to 35% of the total width in the width direction of the cutting blade 200 outside the side area 220. is there. Further, in the present specification, the side area 220 and the end area 230 are collectively referred to as an “external area”.
- the configuration having the central area 210, the side area 220, and the end area 230 will be described, but the configuration does not have the end area 230 and includes the central area 210 and the side area 220.
- the central area 210 is in the range of 20 to 30% of the total width in the width direction of the cutting blade 200
- the side area 220 is outside the central area 210 in the width direction of the cutting blade 200. It ranges from 70 to 80% of the total width.
- the cutting blade 200 has a substantially V shape as a whole. As a result, since the central area 210 is arranged so as to protrude from the side area 220, the teeth of the central area 210 can be easily inserted into the package 50 at the initial stage of the central cut, and the central cut can be performed more easily.
- FIG. 4 is a partially enlarged view of the region X in FIG. 3, showing the teeth constituting the central area 210.
- the cutting blade 200 is symmetrically configured in the width direction of the cutting blade 200 with the apex of the central area 210 interposed therebetween.
- the central area 210 includes a plurality of central teeth having different tooth heights, and the plurality of central teeth are arranged in a staggered manner so that the tips of the three consecutive central teeth are not located on the same straight line. ..
- the central area 210 is the area where the tooth tips first reach the package 50 in the central cut.
- the central teeth are inserted into the package 50 at the same time so as to reach the package 50 in order from the central tooth having the highest tooth height.
- the number of can be reduced. This makes it easier to insert the tip of each central tooth in the central area 210 into the package 50, as the stress for cutting the package 50 is always distributed to only a smaller number of central teeth.
- the cutting of the package 50 can be started with less stress. Therefore, the central area 210 can reduce the feeling of resistance to the user at the initial stage of the central cut.
- the central area 210 has a plurality of central large teeth 212 having the highest tooth height, a plurality of central middle teeth 214 having a lower tooth height than the central large tooth 212, and a tooth height smaller than the central middle tooth 214. It has a central small tooth 216.
- an extension line of the inner oblique side of the central tooth is extended.
- the intersection CS with the extension line of the outer oblique side of the central tooth adjacent to the inside of the central tooth is the intersection CS
- the central large tooth 212, the central middle tooth 214, and the central small tooth constituting the central area 210 216 has a shape in which the intersection CS for all the central teeth is located on the same virtual straight line (hereinafter, also simply referred to as “tooth base line L1”).
- the central large tooth 212, the central middle tooth 214, and the central small tooth 216 have an arcuate shape on the inner hypotenuse of the central tooth and the outer hypotenuse of the central tooth adjacent to the inner side of the central tooth. is there.
- the outer hypotenuse and the inner hypotenuse are composed of arcs that form a part of two different circles, and the extension lines of the outer hypotenuse and the inner hypotenuse are the outer hypotenuse and the inner hypotenuse, respectively. It is an extension of the arc that constitutes.
- one of the inner hypotenuse of the central tooth and the outer hypotenuse of the central tooth adjacent to the inner side of the central tooth may be arcuate and the other linear, or both may be linear. It may be.
- the intersection of the extension lines of each straight line is set as the intersection CS.
- the central large tooth 212, the central middle tooth 214, and the central small tooth 216 constituting the central area 210 are the tooth tips of the central teeth and the central teeth adjacent to the central teeth for all the central teeth.
- the point of contact with the virtual straight line parallel to the tooth bottom line L1 to which the side connecting to the tooth tip of the tooth (hereinafter, also simply referred to as “joining side”) is in contact with the same straight line (hereinafter, simply "tooth valley line L2'"). It has a shape located above.
- the central large tooth 212, the central middle tooth 214, and the central small tooth 216 do not have to have the above contact points on the same tooth valley line L2'for all the central teeth, and a plurality of tooth valleys in the central area 210.
- a line may be set.
- the tooth tips of all the central middle teeth 214 are located on the same virtual straight line (hereinafter, also simply referred to as "middle tooth line L3"), and the tooth tips of all the central large teeth 212 are It is located on the same virtual straight line (hereinafter, also simply referred to as "large tooth line L4").
- the straight lines L1, L2', L3 and L4 are all parallel, and if the virtual straight line passing through the tip of the central small tooth 216 and parallel to the straight lines L3 and L4 is the small tooth line L5, the tooth bottom line L1 and the tooth valley line L2' , Small tooth line L5, medium tooth line L3 and large tooth line L4 are arranged in this order.
- the central large tooth 212 is arranged at a position that is the apex of the V shape that is also the center of the cutting blade 200 in the central area 210 (central large tooth 212a in FIG. 4), and both of the positions that are the apex of the V shape.
- a plurality of teeth are arranged on the outside (two central large teeth 212b and 212c in FIG. 4).
- the central large tooth 212 is the central tooth that is first inserted into the package 50 at the initial stage of the central cut, and is inserted in order from the central large tooth 212a arranged at the apex of the V shape toward both outer sides. By going on, cutting of the package 50 is started. This allows cutting in the early stages of the central cut to begin with less stress.
- the central large tooth 212 has a high mechanical strength because the width of the tooth root is larger. Therefore, by arranging the plurality of central large teeth 212 in the central area 210, the mechanical strength of the central area 210 can be increased and the durability of the cutting blade 200 can be enhanced.
- a plurality of central middle teeth 214 (4 on one side in FIG. 4) are arranged over the entire central area 210.
- the central middle tooth 214 is pierced into the package 50 following the central large tooth 212 to further advance the cutting of the package 50.
- some of the central middle teeth 214 (two central middle teeth 214a and central middle teeth 214b in FIG. 4) are arranged at positions sandwiched between the two central large teeth 212, so that the tooth roots are formed.
- the wide valley of the central large tooth 212 having a wide width reduces the resistance to cutting due to being caught on the package 50 at the time of cutting, and the cutting of the package 50 can be made easier.
- some other teeth of the central middle tooth 214 are arranged in the area of the central area 210 on the side area 220 side and packaged. The cutting of the object 50 is smoothly transferred from the central area 210 to the side area 220.
- One or more central small teeth 216 are arranged in the area of the central area 210 on the side area 220 side (one on one side in FIG. 4), and the package 50 is cut together with the central middle teeth 214c and 214d. Is smoothly transferred from the central area 210 to the side area 220.
- the central large tooth 212, the central middle tooth 214, and the central small tooth 216 constituting the central area 210 all have the outer hypotenuse of the central tooth and the inner hypotenuse of the adjacent central tooth on the outside of the central tooth. It is connected via one or more arcs without a refraction point. It should be noted that the fact that they are connected without having a refraction point means that both the hypotenuse on the outside of the tooth, the hypotenuse on the inside of the adjacent tooth on the outside of the tooth, and the arc are all connected points. It is a rounded intersection, and it means that a vertex-like bend whose slope changes discontinuously is not formed.
- the hypotenuses of the respective central teeth or the hypotenuses and the tooth valleys are connected to each other so as to have a certain angle (to have a refraction point), as compared with the case where the hypotenuses of the respective central teeth are connected to each other. If the hypotenuses are connected without having an inflection point (no inflection point is generated between the tooth ridges), the traveling direction of the notch generated at the confluence of breaks becomes closer to the width direction of the package 50. Vertical tears during restoration are less likely to occur.
- the radius of curvature (Rc) of each of the above arcs connecting the outer hypotenuse of one central tooth and the inner hypotenuse of the adjacent central tooth on the outer side of the central tooth is 0. It is 5 mm or more and 1.3 mm or less.
- the radius of curvature (Rc) is 0.5 mm or more, it is possible to make it difficult for a notch to occur at the confluence of fractures, and the traveling direction of the notch generated at the confluence of fractures is more widespread in the package 50. It can be made closer to the direction to make it less likely that vertical tears will occur during restoration.
- the radius of curvature (Rc) is 1.3 mm or less, the package 50 is less likely to be caught in the arc during cutting, and cutting can be performed more easily.
- the preferable range of the radius of curvature Rc is 0.5 mm or more and 1.2 mm or less, and the more preferable range is 0.6 mm or more and 1.2 mm or less.
- the central area 210 does not have extroverted teeth, and all of them are upward teeth.
- the outward teeth are arranged only in the external area (only the side area 220 in this embodiment).
- the central area 210 having no outward teeth can make it difficult for the package 50 to be caught in the outward teeth at the initial stage of cutting the central cut to prevent interruption of cutting.
- FIG. 5 is a partially enlarged view of the region Y in FIG. 3, showing the side teeth constituting the side area 220.
- the side area 220 includes a plurality of side teeth 222 having the same tooth height, and in the present embodiment, the plurality of side teeth 222 are all outward teeth having tooth tips facing outward. Is.
- the side area 220 is a region in which the cutting of the package 50 started in the central area 210 proceeds toward the end of the package 50 in the central cut, and is started in the end area 230 in the end cut. This is a region where the cutting of the package 50 is advanced toward the center of the package 50.
- the plurality of side teeth 222 constituting the side area 220 are all outward teeth, it is easy to insert the side teeth 222 into the package 50 particularly at the time of edge cutting, and the package 50 is relative to the side teeth. Diagonal cutting is unlikely to occur due to skidding.
- one of the side teeth 222 (extrovert teeth) constituting the side area 220 is T1
- the adjacent teeth arranged adjacent to the outside of the side teeth T1 are designated as T1.
- T2 be, and let T3 be an adjacent tooth arranged adjacent to the inside of the side tooth T1.
- the point where the extension line of the outer hypotenuse of the side tooth T1 and the extension line of the inner hypotenuse of the adjacent tooth T2 intersect is defined as the intersection S1 and the inner hypotenuse of the side tooth T1.
- the point where the extension line and the extension line of the outer hypotenuse of the adjacent tooth T3 intersect is defined as the intersection S2.
- the perpendicular line drawn from the tip of the side tooth T1 with respect to the virtual straight line connecting the intersection S1 and the intersection S2 is the above virtual straight line (tooth bottom line).
- the point that intersects with L1) is designated as the intersection S3.
- the distance between S1 and S3 is D1
- the distance between S1 and S2 is D2.
- the ratio of D1 and D2 satisfies the following formula 1.
- D1 / D2 0.20 or more and 0.40 or less ...
- the "external tooth” is a tooth having D1 / D2 calculated by the above method with the tooth as T1 and having a D1 / D2 of less than 0.50.
- the term “upward tooth” means a tooth having a D1 / D2 of 0.50 or more (preferably 0.75 or less).
- the plurality of side teeth 222 (extrovert teeth) constituting the side area 220 are all adjacent side teeth (extrovert teeth) on the outer hypotenuse of the side teeth (extrovert teeth) and outside the side teeth. ) Is connected to the inner hypotenuse via one or more arcs without having an inflection point. As a result, cutting of the package 50 occurs along the hypotenuse, and it becomes difficult for the package 50 to proceed in the direction of the wound body. Therefore, the direction of travel of the notch (crack) becomes closer to the width direction of the package 50, and at the time of restoration. Vertical tearing in the direction of the ticket rotation is less likely to occur, and recovery at the time of rewinding becomes easier.
- the arc connecting the outer hypotenuse of the side tooth T1 and the inner hypotenuse of the adjacent tooth T2 has a radius of curvature (R1) of 0.3 mm or more for any of the side teeth. It is 3 mm or less.
- R1 radius of curvature
- the radius of curvature (R1) is 0.3 mm or more, vertical tears are less likely to occur at the confluence of fractures, and recovery at the time of rewinding can be performed more easily.
- the radius of curvature (R1) is 1.3 mm or less, the package 50 is less likely to be caught in the arc, and cutting can be performed more easily in both the center cut and the edge cut.
- the preferable range of the radius of curvature R1 is 0.35 mm or more and 1.2 mm or less, and the more preferable range is 0.35 mm or more and 1.0 mm or less.
- the radius of curvature R of the outer oblique side of the side tooth T1 is preferably 1.0 mm or more and 10.0 mm or less, and more preferably 1.5 mm or more and 8.0 mm or less.
- the radius of curvature R of the inner oblique side of the adjacent tooth T2 is preferably 1.0 mm or more and 7.0 mm or less, and more preferably 1.5 mm or more and 6.0 mm or less.
- the virtual straight line parallel to the tooth bottom line L1 that is in contact with the connecting side connecting the tooth tip of the side tooth T1 and the tooth tip of the adjacent tooth T2 is a tooth valley parallel to the tooth valley line L2'. It is a straight line different from the line L2'(hereinafter, also simply referred to as "tooth valley line L2").
- the tooth valley line L2 is located between the tooth valley line L2'and the small tooth line L5 (see FIG. 4).
- the virtual straight line connecting the tooth tips of the side teeth 222 (extroverted teeth) is the same straight line as the middle tooth line L3.
- the position of the virtual straight line connecting the tooth tips of the side teeth is not particularly limited, and may be the same straight line as the small tooth line L5 or a straight line higher than the small tooth line L5 and lower than the large tooth line L4. ..
- the tooth tips of all the side teeth are located on the middle tooth line L3, but the tooth tips of all the side teeth are on the same virtual straight line (middle tooth line L3 in FIG. 5). It does not have to be located in.
- the side area 220 may have a plurality of side teeth having different distances from the bottom line L1 to the tooth tips of the side teeth.
- FIG. 6 is a partially enlarged view of the region Z in FIG. 3, showing the teeth constituting the end area 230.
- the end area 230 includes a plurality of end teeth having different tooth heights, and in the present embodiment, the plurality of end teeth are all upward teeth. Further, the plurality of end teeth are arranged in a staggered manner so that the tips of the three consecutive end teeth are not located on the same straight line.
- the end area 230 is the area where the tooth tips first reach the package 50 in the end cut. At this time, since the tips of the three consecutive end teeth are not located on the same straight line, the end teeth having the highest tooth height are reached in order from the end teeth, and are simultaneously pierced into the package 50. The number of end teeth can be reduced.
- the stress for cutting the package 50 is always distributed to only a smaller number of end teeth, making it easier to insert the tips of the end teeth in the end area 230 into the package 50. Therefore, it is possible to start cutting the package 50 with less stress at the initial stage of edge cutting. Therefore, the end area 230 can reduce the feeling of resistance to the user at the initial stage of the end cut.
- the end area 230 is the area where the package 50 is finally cut in the central cut. Also at this time, when the packaging container 10 is rotated downward, the end area 230 advances from the central area 210 to the side area 220 by sequentially inserting the respective end teeth into the package 50. The cutting of the package 50 can proceed smoothly.
- the end area 230 has a plurality of large end teeth 232 having a large tooth height, and a plurality of middle end teeth 234 having a tooth height smaller than that of the large end teeth 232.
- a plurality of large end teeth 232 are arranged in the end area 230 (two large end teeth 232a and 232b in FIG. 6).
- the large end tooth 232 is the tooth that is first inserted into the package 50 at the initial stage of end cutting, and is inserted in order from the large end tooth 232 arranged at the position to be the end of the cutting blade 200 toward the center side.
- cutting of the package 50 is started. This allows cutting in the early stages of edge cutting to begin with less stress.
- the large end tooth 232 has a high mechanical strength because the width of the tooth root is larger. Therefore, by arranging the plurality of large end teeth 232 in the end area 230, the mechanical strength of the end area 230 can be increased and the durability of the cutting blade 200 can be improved.
- the end middle tooth 234 is pierced into the package 50 following the end large tooth 232 to further advance the cutting of the package 50.
- Some of the end middle teeth 234 (end middle teeth 234a in FIG. 6) are arranged at positions sandwiched between the two end large teeth 232, so that the end large teeth 232 having a wide tooth base are arranged.
- the wide valley of the sill can reduce the resistance to cutting due to being caught on the package 50 at the time of cutting, and can make the cutting of the package 50 easier.
- the other end middle teeth (end middle teeth 234b in FIG. 6) of the end middle teeth 234 are arranged in the area of the end area 230 on the side area 220 side to cut the package 50 at the end. The smooth transition from the part area 230 to the side area 220.
- the outer hypotenuse of the end tooth and the inner hypotenuse of the adjacent end tooth on the outside of the end tooth are 1. It is connected via one or more arcs without a refraction point. As described above, when the hypotenuses of the respective end teeth are connected via an arc, vertical tearing is less likely to occur at the confluence of fractures, and recovery at the time of rewinding can be performed more easily.
- the radius of curvature R of the outer oblique side of the end tooth is preferably 1.0 mm or more and 10.0 mm or less, and more preferably 1.5 mm or more and 8.0 mm or less.
- the radius of curvature R of the inner oblique side of the tooth adjacent to the end tooth is preferably 1.0 mm or more and 7.0 mm or less, and more preferably 1.5 mm or more and 6.0 mm or less.
- the arcs connecting the outer hypotenuse of one end tooth and the inner hypotenuse of the adjacent end tooth on the outside of the end tooth are all the radius of curvature (R2). Is 0.3 mm or more and 1.3 mm or less.
- R2 the radius of curvature
- the radius of curvature (R2) is 0.3 mm or more, it is possible to make it difficult for a notch to occur at the confluence of fractures.
- the radius of curvature (R2) is 1.3 mm or less, the package 50 is less likely to be caught in the arc at the initial stage of the end cut or the final cut of the center cut, and the package 50 can be cut more easily. be able to.
- the preferable range of the radius of curvature R2 is 0.4 mm or more and 1.2 mm or less, and the more preferable range is 0.5 mm or more and 1.2 mm or less.
- an extension line of the inner oblique side of the end teeth is extended.
- the intersection PS the point where the extension line of the outer oblique side of the end tooth adjacent to the inside of the end tooth intersects is the intersection PS, the end large tooth 232 and the end middle tooth 234 constituting the end area 230 are ,
- the intersection PS for all end teeth has a shape located on the root line L1.
- the tip of the end tooth and the tip of the end tooth adjacent to the outside of the end tooth has a shape parallel to the tooth valley line L2 and in contact with a straight line different from the tooth valley line L2 (hereinafter, also simply referred to as “tooth valley line L2''”).
- tooth valley line L2'' a straight line different from the tooth valley line L2
- the large end tooth 232 and the middle end tooth 234 do not have to have the above contact points on the same tooth valley line L2'' for all teeth, and a plurality of tooth valley lines are set in the end area 230. You may.
- the tooth valley line L2 ′′ is located between the tooth valley line L2 and the tooth bottom line L1 (see FIG. 6).
- the virtual straight line connecting the tooth tips of the end large tooth 232 is the same straight line as the large tooth line L4, and the virtual straight line connecting the tooth tips of the end middle tooth 234 is the same straight line as the middle tooth line L3.
- the position of the virtual straight line connecting the tooth tips of the large end teeth 232 is not particularly limited, and may be a straight line at a position higher than the middle tooth line L3.
- the position of the virtual straight line connecting the tooth tips of the end middle teeth 234 is not particularly limited, and if it is the same straight line as the middle tooth line L3 or a straight line higher than the small tooth line L5 and lower than the large tooth line L4. Good.
- FIG. 7 is a front view showing a schematic configuration of the cutting blade 300 according to the second embodiment of the present invention. Similar to the cutting blade 200 in the first embodiment, the cutting blade 300 has a central area 310, a pair of side areas 320 arranged outside the central area 310, and a cutting blade 300 outside the side area 320. It has a pair of end areas 330 arranged at the ends.
- the cutting blade 300 according to the present embodiment is different from the cutting blade 300 in the first embodiment only in the shape of the teeth constituting the side area 320 and the end area 330. Therefore, the description of the common points with the cutting blade 300 in the first embodiment will be omitted below.
- the cutting blade 300 includes a central area 310, a side area 320 (side connection area 320a and a side main area 320b), and an end area 330 (end connection area 330a and end). It has a main main area 330b).
- the central area 310 is in the range of 5 to 20% of the total width in the width direction of the cutting blade 300
- the side connection area 320a is the length of the total width in the width direction of the cutting blade 300 outside the central area 310.
- the side main area 320b is the range of 35 to 50% of the total width in the width direction of the cutting blade 200 outside the side connection area 320a, and is in the range of 10 to 20%.
- connection area 330a is a range of 5 to 10% of the total width in the width direction of the cutting blade 300 outside the side main area 320b, and the end main area 330b is outside the end connection area 330a. , The range is 10 to 25% of the total width of the cutting blade 300 in the width direction.
- the configuration having the central area 310, the side area 320, and the end area 330 will be described, but the configuration does not have the end area 330 and includes the central area 310 and the side area 320.
- the central area 310 is in the range of 20 to 30% of the total width in the width direction of the cutting blade 300
- the side area 320 is outside the central area 310 in the width direction of the cutting blade 300. It ranges from 70 to 80% of the total width.
- the central area 310 includes a plurality of central large teeth 312 having the highest tooth height, a plurality of central middle teeth 314 having a tooth height smaller than that of the central large tooth 312, and a central small tooth 316 having a tooth height smaller than that of the central middle tooth 314.
- a central large tooth 312 having the highest tooth height
- a plurality of central middle teeth 314 having a tooth height smaller than that of the central large tooth 312
- a central small tooth 316 having a tooth height smaller than that of the central middle tooth 314.
- the side area 320 has a side connection area 320a which is a connection area with the central area 310 and a side main area 320b having a plurality of outward teeth.
- FIG. 8 is a partially enlarged view of the region S in FIG. 7, showing the teeth constituting the vicinity of the boundary between the central area 310 and the side area 320 (side connection region 320a).
- FIG. 9 is a partially enlarged view of the region T in FIG. 7, showing the teeth forming the vicinity of the boundary between the side connection region 320a and the side main region 320b.
- the side connection region 320a includes a plurality of side teeth 322a having the same tooth height, and the plurality of side teeth 322a are all upward teeth.
- the side connection region 320a composed of the plurality of upward teeth is a side main region in which the cutting of the package 50 is likely to proceed with the central area 310 composed of the upward teeth and the tooth height is the same. It is easy to proceed with cutting of the package 50 even with the 320b. Therefore, the side connection area 320a facilitates the cutting of the package 50 by the central cut from the central area 310 to the side main area 320b, and the cutting of the package 50 by the end cut is performed by the side main area 320b. To facilitate progress from to the central area 310.
- each of the plurality of side teeth 322a constituting the side connection region 320a one or the inner hypotenuse of the side tooth adjacent to the outside of the side tooth is present. It is connected via a plurality of arcs without having a refraction point. As a result, the cutting blade is less likely to be caught in the package 50 when the package 50 is cut, and vertical tearing is less likely to occur, so that recovery at the time of rewinding becomes easier.
- the arc connecting the outer hypotenuse of the side tooth 322a and the inner hypotenuse of the adjacent side tooth on the outside of the side tooth is any side tooth (external tooth and
- the radius of curvature (R1') of both the upward teeth) is 0.3 mm or more and 1.3 mm or less.
- the radius of curvature (R1') is 0.3 mm or more, vertical tears are less likely to occur at the confluence of fractures, and recovery at the time of rewinding can be performed more easily.
- the radius of curvature (R1') is 1.3 mm or less, the package 50 is less likely to be caught in the arc, and cutting can be performed more easily in both the center cut and the edge cut.
- the preferable range of the radius of curvature R1' is 0.35 mm or more and 1.2 mm or less, and the more preferable range is 0.35 mm or more and 1.0 mm or less.
- the side main region 320b includes a plurality of side teeth 322b having the same tooth height, and the plurality of side teeth are all outward teeth. Similar to the side area 220 in the first embodiment, the side main region 320b having a plurality of outward teeth is easy to insert the side teeth into the package 50, particularly at the time of edge cutting, and the package 50 is on the side. Diagonal cutting due to skidding with respect to the local teeth is unlikely to occur.
- the side teeth (side connecting teeth 322c) arranged on the side closest to the side connecting region 320a have a tooth width of the side connecting region. It is smaller than the side teeth 322a of the 320a and the other side teeth 322b of the side main region 320b.
- Such side connecting teeth 322c have a role of bridging the cutting between the side connecting region 320a mainly composed of the upward teeth and the side main region 320b composed of the outward teeth, and the packaging in the region. Can suppress skidding of objects.
- one of the side teeth (extroverted side teeth 322b or side connecting teeth 322c) arranged in the side main region 320b is designated as T1 and the side portion.
- An adjacent tooth arranged adjacent to the outside of the tooth T1 is referred to as T2, and an adjacent tooth arranged adjacent to the inside of the side tooth T1 is referred to as T3.
- the point where the extension line of the outer hypotenuse of the side tooth T1 and the extension line of the inner hypotenuse of the adjacent tooth T2 intersect is defined as the intersection S1 and the inner hypotenuse of the side tooth T1.
- the point where the extension line and the extension line of the outer hypotenuse of the adjacent tooth T3 intersect is defined as the intersection S2.
- a perpendicular line hung from the tip of the side tooth T1 with respect to a virtual straight line connecting the intersection S1 and the intersection S2 (also in the present embodiment, the same straight line as the tooth bottom line L1).
- the point where the virtual straight line (tooth bottom line L1) intersects is defined as the intersection S3.
- the distance between S1 and S3 is D1
- the distance between S1 and S2 is D2.
- the ratio of D1 and D2 satisfies the following equation 1.
- D1 / D2 0.20 or more and 0.40 or less ...
- the plurality of side teeth (extrovert teeth) constituting the side main region 320b are adjacent to the outer hypotenuse of the side teeth (extrovert teeth) on the outside of the side teeth.
- the inner hypotenuse of the lateral tooth (extrovert tooth) is connected via one or more arcs without having an inflection point.
- the arc connecting the outer hypotenuse of the side tooth T1 and the inner hypotenuse of the adjacent tooth T2 has a radius of curvature (R1) of 0.3 mm for any of the side teeth. It is 1.3 mm or more and 1.3 mm or less.
- the radius of curvature (R1) is 0.3 mm or more, vertical tears are less likely to occur at the confluence of fractures, and recovery at the time of rewinding can be performed more easily.
- the radius of curvature (R1) is 1.3 mm or less, the package 50 is less likely to be caught in the arc, and cutting can be performed more easily in both the center cut and the edge cut.
- the preferable range of the radius of curvature R1 is 0.35 mm or more and 1.2 mm or less, and the more preferable range is 0.35 mm or more and 1.0 mm or less.
- the radius of curvature R of the outer oblique side of the side tooth T1 is preferably 1.0 mm or more and 10.0 mm or less, and more preferably 1.5 mm or more and 8.0 mm or less. ..
- the radius of curvature R of the inner oblique side of the adjacent tooth T2 is preferably 1.0 mm or more and 7.0 mm or less, and more preferably 1.5 mm or more and 6.0 mm or less.
- the virtual straight line parallel to the tooth bottom line L1 that is in contact with the connecting side connecting the tooth tip of the side tooth T1 and the tooth tip of the adjacent tooth T2 is a tooth valley parallel to the tooth valley line L2'. It is a straight line different from the line L2'(tooth valley line L2a and tooth valley line L2b). Also in this embodiment, the tooth valley line L2a and the tooth valley line L2b are located between the tooth valley line L2'and the small tooth line L5. Further, the tooth valley line L2a when the plurality of side teeth constituting the side connection region 320a are the side teeth T1 and the adjacent teeth T2, and the plurality of side teeth constituting the side main region 320b are side portions.
- the tooth valley line L2b when the tooth T1 and the adjacent tooth T2 are used are different straight lines parallel to each other.
- the tooth valley line L2b is located between the tooth valley line L2a and the tooth valley line L2'.
- the extension line of the inner oblique side of the side tooth 322a and the outer oblique side of the lateral tooth adjacent to the inside of the side tooth 322a is located on a straight line (tooth bottom line L1') parallel to the tooth bottom line L1 and different from the tooth bottom line L1.
- the tooth bottom line L1' is located between the tooth valley line L2'and the tooth valley line L2.
- the virtual straight line connecting the tooth tips of the side tooth 322a, the side tooth 322b and the side connecting tooth 322c is the same straight line as the middle tooth line L3.
- the position of the virtual straight line connecting the tips of these side teeth is not particularly limited, and may be the same straight line as the small tooth line L5 or a straight line higher than the small tooth line L5 and lower than the large tooth line L4. Just do it.
- the tooth tips of all the side teeth are located on the middle tooth line L3, but the tooth tips of all the side teeth are the same virtual straight line (in FIGS. 8 and 9). It does not have to be located on the middle tooth line L3).
- the side area 320 may have a plurality of side teeth having different distances from the bottom line L1 to the tooth tips of the side teeth.
- the end area 330 includes an end connection area 330a, which is a connection area with the side area 320 (side main area 320b), and an end having a plurality of outward teeth. It has a main region 330b and.
- FIG. 10 is a partially enlarged view of the region U in FIG. 7, showing the teeth constituting the end connection region 330a and the end main region 330b.
- the end connection region 330a includes a plurality of end teeth having different tooth heights, and the plurality of end teeth are all outward teeth. Further, the plurality of end teeth are arranged so that the tips of the three consecutive end teeth are not located on the same straight line.
- the end connection region 330a includes a plurality of connecting middle teeth 336 having the same tooth height as the side teeth 322b of the side main region, and the ends of the connecting middle teeth 336 and the end main region 330b. It has a plurality of connecting large teeth 338 that are tooth heights between the large teeth 332.
- the connecting middle tooth 336 and the connecting large tooth 338 are arranged alternately.
- the virtual straight line connecting the tooth tips of the connecting middle tooth 336 is the same straight line as the middle tooth line L3, and the virtual straight line L6 connecting the tooth tips of the connecting large tooth 338 is higher than the middle tooth line L3 and the large tooth line L4. It is a straight line at a lower position.
- the end connection region 330a has a plurality of end teeth having different tooth heights so that the package 50 can be cut from the side main region 320b having a lower tooth height to the end main region 330b having a higher tooth height. (Or from the end main area 330b to the side main area 320b).
- the end main region 330b is composed of a plurality of large end teeth 332 and a plurality of middle end teeth 334 as in the first embodiment.
- both the large end tooth 332 and the middle end tooth 334 are extrovert teeth.
- the end teeth are easily inserted into the end cut, and the package 50 is less likely to be cut diagonally due to skidding with respect to the end teeth.
- the end tooth (the end middle tooth 334 in FIG. 10), which is one outward tooth of the end main region 330b, is designated as T4, and is arranged adjacent to the outside of the end tooth T4.
- the adjacent tooth is T5 (large end tooth 332b in FIG. 10)
- the adjacent tooth arranged adjacent to the inside of the end tooth T4 is T6 (large end tooth 332a in FIG. 10).
- the point where the extension line of the outer hypotenuse of the end tooth T4 and the extension line of the inner hypotenuse of the adjacent tooth T5 intersect is defined as the intersection S4, and the inner hypotenuse of the end tooth T4.
- the point where the extension line and the extension line of the outer hypotenuse of the adjacent tooth T6 intersect is defined as the intersection S5.
- D3 / D4 is less than 0.50, the tips of the outward teeth of the end area 330 face outward, so that the end teeth can be inserted into the package 50 with less stress at the time of end cutting. Therefore, the cutting of the package 50 can be easily proceeded. Therefore, it is possible to suppress the occurrence of diagonal cuts due to the end teeth not being sufficiently pierced into the package 50 and the package 50 skidding with respect to the end teeth.
- D3 / D4 is 0.35 or more, the tips of the outward teeth of the end area 330 do not face too outward, so that the cutting of the package 50 started in the central area 310 at the time of the central cut ends.
- the end teeth are attached to the package 50 at the time of end cutting. Can be more easily inserted, and the occurrence of diagonal cuts at the time of edge cutting can be suppressed more effectively.
- the virtual straight line parallel to the tooth bottom line L1 in which the connecting side connecting the end tooth T4 and the adjacent tooth T5 is in contact is the same straight line as the tooth valley line L2 ′′.
- D3 / D4 when the connecting middle tooth 336 or the connecting large tooth 338 included in the end connecting region 330a is similarly defined as the end tooth T4 is also the end large tooth 332 or the end middle tooth possessed by the end main region 330b. It is preferable that the 334 is within the same range as D3 / D4 when the end tooth T4 is defined.
- the end main area of the end connecting area 330a By making the D3 / D4 of the connecting middle tooth 336b and the connecting large tooth 338b arranged on the 330b side larger (closer to the outward tooth D3 / D4 of the end main region 330b), the cutting of the package 50 can be performed. A smooth transition can be made from the side main area 320b to the end area 330 (or from the end area 330 to the side main area 320b).
- D1 / D2 of the outward teeth in the side main region 320b, D3 / D4 of the outward teeth in the end connection region 330a, and D3 / D4 of the outward teeth in the end main region 330b increase in this order. It is preferable to continue.
- the end teeth constituting the end area 330 are all of the end teeth adjacent to the outer hypotenuse of the end tooth and the outside of the end tooth.
- the inner hypotenuse is connected via one or more arcs without a refraction point. As described above, when the hypotenuses of the respective end teeth are connected via an arc, vertical tearing is less likely to occur at the confluence of fractures, and recovery at the time of rewinding can be performed more easily.
- the radius of curvature (R2) of each of the above arcs connecting the outer hypotenuse of one end tooth and the inner hypotenuse of the adjacent end tooth on the outside of the end tooth has a radius of curvature (R2). It is 0.3 mm or more and 1.3 mm or less.
- the radius of curvature (R2) is 0.3 mm or more, it is possible to make it difficult for a notch to occur at the confluence of fractures.
- the radius of curvature (R2) is 1.3 mm or less, the package 50 is less likely to be caught in the arc at the initial stage of end cutting or the final cutting of the central cut, and cutting can be performed more easily.
- the preferable range of the radius of curvature R2 is 0.4 mm or more and 1.2 mm or less, and the more preferable range is 0.5 mm or more and 1.2 mm or less.
- the radius of curvature R of the outer hypotenuse of the end tooth T4 is preferably 1.0 mm or more and 10.0 mm or less, and 1.5 mm or more and 8 More preferably, it is 0.0 mm or less.
- the radius of curvature R of the inner oblique side of the adjacent tooth T5 is preferably 1.0 mm or more and 7.0 mm or less, and more preferably 1.5 mm or more and 6.0 mm or less.
- FIG. 11 is a perspective view schematically showing the configuration of the packaging container 20 according to the third embodiment of the present invention when the lid is closed.
- the packaging container according to the present embodiment is different from the packaging container according to the first embodiment or the second embodiment in that the central area 410, the side area 420, and the end area 430 have a linear cutting blade 400.
- the shape of the teeth of each of the central area 410, the side area 420, and the end area 430 may be the same as that of the first embodiment or the second embodiment.
- the tip 125 of the lid piece 124 and the cutting blade 400 have a linear shape.
- the cutting blade 400 has a plurality of teeth arranged from the center of the cutting blade 400 toward both ends.
- the plurality of teeth are arranged so that the tooth bottom line L1, the tooth valley line L2, the small tooth line L5, the middle tooth line L3, and the large tooth line L4 set on the cutting blade 400 are all straight lines. Tooth.
- the outward teeth arranged in the side area opposite to the end on the side where the cut is started do not easily hinder the progress of the cut, so that the end is cut. Can be done more easily.
- FIG. 12 is a perspective view schematically showing the configuration of the packaging container 30 according to the fourth embodiment of the present invention when the lid is closed.
- the packaging container according to the present embodiment is the same as the packaging container according to the first embodiment or the second embodiment in that the central area 510, the side area 520, and the end area 530 all have a bending blade 500. Is different.
- the shape of the teeth of each of the central area 510, the side area 520, and the end area 530 may be the same as that of the first embodiment or the second embodiment.
- the tip 125 of the lid piece 124 and the cutting blade 500 have a substantially M-shaped shape.
- the cutting blade 500 has a plurality of teeth arranged from the center of the cutting blade 500, which is also a substantially M-shaped apex, toward both ends.
- the plurality of teeth are packaged when the above-mentioned tooth bottom line L1, tooth valley line L2, small tooth line L5, middle tooth line L3, large tooth line L4 and the like are installed in the packaging container 30.
- the teeth are arranged so as to form a convex curve in the direction from the bottom plate 118 to the lid 120.
- the packaging container 30 since the teeth of the end area 530 can be projected further downward, the teeth of the end area 530 can be easily inserted into the package 50 at the initial stage of the end cut, and the end cut can be made. Can be done more easily.
- the central area 510 is arranged so as to protrude from the side area 520, so that the central area is cut. In the initial stage, the teeth of the central area 510 can be easily inserted into the package 50, and the central cut can be performed more easily.
- the shape of the cutting blade 500 is not limited to the substantially M shape, and for example, each of the above lines may be arranged so as to be curved only in the side area 520.
- the shape of the central area is shown in Table 1
- the shape of the side area is shown in Table 2
- the shape of the end area is shown in Table 3.
- Test-1 Ease of edge cutting
- Twenty-five testers including randomly selected men and women, cut a film of polyvinylidene chloride that was wound and contained in a packaging container by edge cutting. Of the 40 cuts made by each tester, the number of diagonal cuts was measured, and the ease of edge cutting was evaluated according to the following criteria. ⁇ 70% or more of the total examiners did not have a diagonal cut. ⁇ 50% or more and 69% or less of the total examiners did not have a diagonal cut. ⁇ The number of examiners who did not have a single diagonal cut was 30% or more and 49% or less of the total examiners. ⁇ The number of examiners who did not have a single diagonal cut was 29% or less of the total examiners. was
- Test-3 Cutting force required for central cutting
- a packaging container containing a wound polyvinylidene chloride film was placed in a measuring instrument equipped with a push-pull gauge, and the film was unwound by 30 cm and fixed to a fixing jig of the measuring instrument.
- the rotation speed of 90 ° per second is such that the entire cutting blade is uniformly pressed against the film.
- the packaging container was rotated around the winding shaft of the wound film. At this time, the maximum value of the rotational force required to cut the film was measured 5 to 10 times, and the average of these was taken as the cutting force required for the central cut.
- Table 4 shows the results of Test-1 to Test-3 for each cutting blade.
- the extrovert teeth are provided only in the external area (side area or end area), and an arc is formed between the extrovert teeth and the adjacent teeth arranged adjacent to the extrovert teeth.
- the recovery rate when rewinding was higher.
- D1 / D2 is 0.20 or more and 0.40 or less
- cutting is easy in both the edge cut and the center cut, and even if D3 / D4 is 0.35 or more and less than 0.50. , Both edge cuts and center cuts facilitated cutting.
- the central area, side area (side connection area and side main area), and end area (end connection area and end main area) are the radius of curvature, D1 / D2 or D3 / D4, respectively. May have a plurality of different teeth.
- the radius of curvature Rc is included in the above range for all the central teeth arranged in the central area, but the radius of curvature Rc may be included in the above range for any one of the central teeth. .. However, it is preferable that the radius of curvature Rc is included in the above range for at least half or more of the central teeth, and it is more preferable that the radius of curvature Rc is included in the above range for all the central teeth.
- the radius of curvature R1 is included in the above range for all the outward teeth arranged in the side area, but if the radius of curvature R1 is included in the above range for any one of the outward teeth. Good. However, it is preferable that the radius of curvature R1 is included in the above range for at least half or more of the outward teeth, and it is more preferable that the radius of curvature R1 is included in the above range for all the outward teeth.
- the radius of curvature R2 is included in the above range for all the end teeth arranged in the end area, but the radius of curvature R2 is included in the above range for any one of the end teeth. It should be done. However, it is preferable that the radius of curvature R2 is included in the above range for at least half or more of the end teeth, and it is more preferable that the radius of curvature R2 is included in the above range for all the end teeth.
- the radius of curvature R of the hypotenuse is included in the above range for all of the central tooth, the side tooth and the end tooth, but any one of the central tooth, the side tooth or the end portion.
- the radius of curvature R of the tooth may be included in the above range.
- it is preferable that the radius of curvature R of at least half or more of the central tooth, the side tooth and the end tooth is included in the above range, and the radius of curvature R of all the teeth is included in the above range. preferable.
- D1 / D2 is included in the above range for all the outward teeth arranged in the side area, but if D1 / D2 is included in the above range for any one of the outward teeth. Good. However, it is preferable that D1 / D2 is included in the above range for at least half or more of the outward teeth, and it is more preferable that D1 / D2 is included in the above range for all the outward teeth.
- D3 / D4 is included in the above range for all the outward teeth arranged in the end area, but D3 / D4 is included in the above range for any one of the outward teeth. It should be. However, it is preferable that D3 / D4 is included in the above range for at least half or more of the extrovert teeth, and it is more preferable that D3 / D4 is included in the above range for all extrovert teeth.
- the central small tooth is arranged in the central area, but the central small tooth may not be arranged.
- the cutting blades are polyester, polyethylene, polypropylene, polystyrene, polyacetal, polyphenylene sulfide, polyetheretherketone (PEEK), polyethersulfone (PES), and polylactic acid (PLA). It may be made of resin such as, or it may be made of metal. However, as shown in the effect confirmation test-2, when the cutting blade is made of resin, vertical tearing of the package is more likely to occur. Therefore, the effect of suppressing vertical tearing of the package is remarkable when the cutting blade is made of resin.
- a stopper may be provided for adhering the vicinity of the cut portion of the package to suppress rewinding. ..
- the stopper may be configured such that, for example, a flap formed by cutting a part of the front plate is formed on the front plate and is formed on the surface of the flap.
- the surfaces of the main body, the lid, and the holding plate may be surface-treated by applying and curing an ultraviolet curable varnish in order to improve water resistance and light resistance.
- the package may be a long sheet or film wound, and the material thereof is a single layer or a multi-layer made of a resin (polyvinyl chloride, vinyl chloride, polyethylene, polymethylpentene, etc.). It may be film or sheet, etc.), paper (roll paper, kitchen paper, cooking heating sheet, cooking sheet, etc.) and metal foil (aluminum foil, etc.).
- a resin polyvinyl chloride, vinyl chloride, polyethylene, polymethylpentene, etc.
- It may be film or sheet, etc.), paper (roll paper, kitchen paper, cooking heating sheet, cooking sheet, etc.) and metal foil (aluminum foil, etc.).
- the package cut by the reverse rotation of the wound package is rewound inside the main body, and the end portion of the package is attached to the surface of the wound package.
- the present invention is expected to enable more comfortable use of packaging containers, promote the use of packaging films and the like for home and business use, and contribute to the development of this field.
- Packaging 100 110 Main body 112a, 112b End plate 114 Front plate 116 Rear plate 118 Bottom plate 119 Opening surface 120 Lid 122 Lid plate 124 Tooth lid piece 125, 125a, 125b Tooth lid piece 126a, 126b Side lid piece 128 connecting part 200, 300, 400, 500 Cutting blade 210, 310, 410, 510 Central area 212, 212a, 212b, 212c, 312 Central large teeth 214, 214a, 214b, 214c, 214d, 314 Central middle tooth 216, 316 Central small tooth 220, 320, 420, 520 Side area 222, 322, 322a, 322b Side tooth 230, 330, 430, 530 End area 232, 232a, 232b, 332, 332a, 332b Large end tooth 234, 234a, 234b, 334 End middle tooth 320a Side connection area 320b Side main area 330a End connection area 330b End
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Abstract
Provided is a cutting blade that is provided along a longitudinal direction of a packaging container accommodating a roll-shaped package and cuts off the package. The cutting blade has a central area in which a plurality of teeth are arranged and a pair of external areas in which a plurality of teeth are arranged outside the central area. Only the external areas have an outward tooth of which the tooth tip is directed outward. An outside oblique side of the outward tooth and an inside oblique side of an adjacent tooth arranged adjacent to the outside of the outward tooth are connected to each other by an arc, and the arc has a curvature radius (R1) of 0.3 mm or more and 1.3 mm or less. The cutting blade facilitates cutting of a package from a center and an end in a width direction and facilitates restoration during rewinding.
Description
本発明は、切断刃および包装容器に関する。
The present invention relates to a cutting blade and a packaging container.
食品の包装などに用いるフィルム状の包装物は、ロール状に巻回されて、略直方体の包装容器に収容される。当該包装容器は、通常、包装物を収容する収容箱と、収容箱から使用量だけ引き出された包装物を切断するための、複数の歯が配列されてなる鋸状の切断刃と、を有する。上記収容箱は、ひとつの面が開口面となっている略直方体の本体部と、上記開口面を開閉する蓋部と、を有し、上記切断刃は、上記蓋部の端辺に配置される。包装物の使用者は、収容箱に収容された包装物の端部を把持して引っ張ることにより、フィルム状の包装物を本体部と蓋部との隙間から引き出し、蓋部を閉じて、本体部と蓋部との間に挟まれた包装物を上記切断刃で切断することにより、使用量の包装物を包装容器から取り出すことができる。
Film-shaped packages used for food packaging, etc. are rolled into rolls and stored in a substantially rectangular parallelepiped packaging container. The packaging container usually has a storage box for storing the package and a saw-shaped cutting blade in which a plurality of teeth are arranged for cutting the package drawn from the storage box in a used amount. .. The storage box has a main body of a substantially rectangular parallelepiped having one surface as an opening surface and a lid portion for opening and closing the opening surface, and the cutting blade is arranged on an end side of the lid portion. To. The user of the package pulls out the film-like package from the gap between the main body and the lid by grasping and pulling the end of the package contained in the storage box, closes the lid, and closes the main body. By cutting the package sandwiched between the portion and the lid portion with the above-mentioned cutting blade, the used amount of the package can be taken out from the packaging container.
包装容器から引き出された包装物の切断方法としては、包装容器を回動させて包装物を中央から切断していく方法(以下、このような切断方法を単に「中央カット」ともいう。)と、包装物の幅方向端部を把持して包装容器に対して捻ることで包装物の幅方向端部から切断していく方法(以下、このような切断方法を単に「端カット」ともいう。)と、が知られている。特許文献1および特許文献2には、切断刃をV字状とすることで中央からの切断を容易にし、一方で切断刃の側部エリアに歯先が外側を向いた歯(以下、単に「外向歯」ともいう。なお、歯先が外側を向かず、蓋部を閉じたときに包装容器の底部に向くように垂直に近い方向を向いた歯を、後述する図面では図中上方向を向いているため、以下、単に「上向歯」ともいう。)を配置することで幅方向端部からの切断も容易とした切断刃を有する包装容器が記載されている。
As a method of cutting the package drawn out from the packaging container, a method of rotating the packaging container to cut the package from the center (hereinafter, such a cutting method is also simply referred to as "center cut"). , A method of cutting from the widthwise end of the package by grasping the widthwise end of the package and twisting it with respect to the packaging container (hereinafter, such a cutting method is also simply referred to as "end cut". ), Is known. In Patent Document 1 and Patent Document 2, a V-shaped cutting blade facilitates cutting from the center, while a tooth having a tooth tip facing outward in a side area of the cutting blade (hereinafter, simply "" Also referred to as "outward teeth". In the drawings to be described later, the upper direction in the drawing is the tooth whose tip does not face outward and faces the bottom of the packaging container when the lid is closed. Described is a packaging container having a cutting blade that facilitates cutting from the widthwise end by arranging (hereinafter, also simply referred to as "upward teeth") because it faces.
なお、このような包装容器において、巻回された包装物の逆回転などにより切断された包装物が本体部の内部へ巻き戻って、包装物の端部が巻回された包装物の表面に貼り付いてしまうことがある。そして、上記貼り付いてしまった端部を再び本体部と蓋部との間に復旧させるとき(以下、単に「復旧時」ともいう。)に、巻回方向への包装物の引き裂き(縦裂け)が生じ得ることが知られている。縦裂けが生じる作用機序は、以下のようであると考えられている。つまり、隣接する歯の歯先が包装物に刺し込まれてそれぞれの歯先により開始された包装物への破断が合流するときに、上記隣接する歯の一方の歯によって開始される破断が過剰に進行することにより、破断の合流点に切り欠き(亀裂)が生じる。そして、巻回された包装物からの引き剥しなどで包装物に印加される応力が上記切り欠きに集中すると、切り欠きを開始点とする新たな破断が進行して、縦裂けが生じてしまう。
In such a packaging container, the package cut by the reverse rotation of the wound package is rewound inside the main body, and the end portion of the package is placed on the surface of the wound package. It may stick. Then, when the end portion that has been stuck is restored between the main body portion and the lid portion (hereinafter, also simply referred to as "recovery time"), the package is torn (vertically torn) in the winding direction. ) Is known to occur. The mechanism of action that causes longitudinal tears is thought to be as follows. That is, when the tips of adjacent teeth are pierced into the package and the breaks to the package initiated by the respective tips merge, the breaks initiated by one of the adjacent teeth are excessive. A notch (crack) is generated at the confluence of fractures. Then, when the stress applied to the package due to peeling from the wound package or the like is concentrated on the notch, a new fracture starting from the notch progresses and a vertical tear occurs. ..
特許文献3には、歯高が異なる複数の歯を交互に配置し、かつ、隣接する歯の向かい合う斜辺同士を弧によって連結した切断刃が記載されている。特許文献3によれば、上記向かい合う斜辺の延長線が交差する点と、上記弧と、の間の距離を「平滑距離」とし、上記向かい合う斜辺の延長線が交差する点と、歯高が同じ複数の歯の歯先を結ぶ直線と、の間の距離をそれぞれの歯高に応じて「第1距離」および「第2距離」とするとき、第1距離に対する平滑距離の割合および第2距離に対する平滑距離の割合をそれぞれ所定の範囲にすることによって、縦裂けが抑制されることが記載されている。
Patent Document 3 describes a cutting blade in which a plurality of teeth having different tooth heights are alternately arranged and the hypotenuses of adjacent teeth are connected by an arc. According to Patent Document 3, the distance between the point where the extension lines of the facing diagonal sides intersect and the arc is defined as a "smooth distance", and the tooth height is the same as the point where the extension lines of the facing diagonal sides intersect. When the distances between the straight lines connecting the tips of multiple teeth are the "first distance" and the "second distance" according to the respective tooth heights, the ratio of the smoothing distance to the first distance and the second distance It is described that vertical tearing is suppressed by setting the ratio of the smoothing distance to the above within a predetermined range.
特許文献1および特許文献2に記載の切断刃では、幅方向端部からの包装物の切断が外向歯によってより容易になっている。また、特許文献3に記載の切断刃では、縦裂けが生じにくいため、復旧が容易になっている。
In the cutting blades described in Patent Document 1 and Patent Document 2, cutting of the package from the widthwise end is made easier by the outward teeth. Further, with the cutting blade described in Patent Document 3, vertical tearing is unlikely to occur, so that restoration is easy.
しかし、本発明者らの知見によれば、特許文献1および特許文献2に記載された切断刃によっても、幅方向端部からの切断時に意図せぬ斜め方向への包装物の切断(斜め切れ)が生じることがある。これは、特許文献1および特許文献2に記載された外向歯によっても、幅方向端部からの切断時に端部の歯が包装体に対して十分に刺し込まれず、包装物が横滑りしてしまうことによると考えられる。
However, according to the findings of the present inventors, even with the cutting blades described in Patent Document 1 and Patent Document 2, the package is cut in an unintended diagonal direction (diagonal cutting) when cutting from the widthwise end. ) May occur. This is because even with the outward teeth described in Patent Document 1 and Patent Document 2, the teeth at the end are not sufficiently pierced into the package when cutting from the end in the width direction, and the package slips sideways. It is thought that this is the case.
また、本発明者らの知見によれば、特許文献3に記載された切断刃によっても、復旧時の包装体への裂けの発生を完全には抑制しきれてはおらず、巻き戻り時に、包装体に裂けが発生しないように復旧させにくいことがあった。
Further, according to the findings of the present inventors, the cutting blade described in Patent Document 3 does not completely suppress the occurrence of tearing in the package at the time of restoration, and the packaging at the time of rewinding. Sometimes it was difficult to recover so that the body would not tear.
本発明は、上記課題に鑑みてなされたものであり、中央からも幅方向端部からも包装物を切断しやすく、かつ、巻き戻り時の復旧が容易になる切断刃、および当該切断刃を有する包装容器を提供することを、その目的とする。
The present invention has been made in view of the above problems, and a cutting blade capable of easily cutting a package from both the center and the end in the width direction and easily recovering at the time of rewinding, and the cutting blade. The purpose is to provide a packaging container that has.
上記課題を解決するための本発明の一態様は、ロール状の包装物を収容する包装容器の長手方向に沿って設けられ、前記包装物を切断する切断刃に関する。上記切断刃は、複数の歯が配列された中央エリアと、前記中央エリアの外側で複数の歯が配列された一対の外部エリアと、を有し、前記外部エリアのみに、歯先が外側を向いた外向歯を有する。前記外向歯の外側の斜辺と前記外向歯の外側に隣接して配置された隣接歯の内側の斜辺とは、円弧によって連接されており、前記円弧の曲率半径(R1)は、0.3mm以上1.3mm以下である。
One aspect of the present invention for solving the above problems relates to a cutting blade provided along the longitudinal direction of a packaging container for accommodating a roll-shaped package and cutting the package. The cutting blade has a central area in which a plurality of teeth are arranged and a pair of external areas in which a plurality of teeth are arranged outside the central area, and the tooth tips are outside only in the external area. Has facing outward teeth. The hypotenuse on the outside of the outward tooth and the hypotenuse on the inside of the adjacent tooth arranged adjacent to the outside of the outward tooth are connected by an arc, and the radius of curvature (R1) of the arc is 0.3 mm or more. It is 1.3 mm or less.
また、本発明の他の態様は、ロール状の包装物を収容する収容箱と、上記収容箱から引き出された上記包装物を切断する上記切断刃と、を有する包装容器に関する。
Another aspect of the present invention relates to a packaging container having a storage box for storing a roll-shaped package and a cutting blade for cutting the package pulled out from the storage box.
本発明により、中央からも幅方向端部からも包装物を切断しやすく、かつ、巻き戻り時の復旧が容易になる切断刃、および当該切断刃を有する包装容器が提供される。
INDUSTRIAL APPLICABILITY The present invention provides a cutting blade that makes it easy to cut a package from both the center and the end in the width direction and that makes it easy to recover when rewinding, and a packaging container having the cutting blade.
[第1の実施形態]
(包装容器)
図1は、本発明の一実施形態に関する包装容器10の構成を模式的に示す、蓋部を閉じたときの斜視図であり、図2は、包装容器10の構成を模式的に示す、蓋部を開いたときの斜視図である。 [First Embodiment]
(Packaging container)
FIG. 1 is a perspective view schematically showing the configuration of thepackaging container 10 according to the embodiment of the present invention when the lid is closed, and FIG. 2 is a lid schematically showing the configuration of the packaging container 10. It is a perspective view when the part is opened.
(包装容器)
図1は、本発明の一実施形態に関する包装容器10の構成を模式的に示す、蓋部を閉じたときの斜視図であり、図2は、包装容器10の構成を模式的に示す、蓋部を開いたときの斜視図である。 [First Embodiment]
(Packaging container)
FIG. 1 is a perspective view schematically showing the configuration of the
包装容器10は、長尺状の包装用フィルムなどを巻芯の周りにロール状に巻回してなる包装物50を引き出し可能に収容する収容箱100と、切断刃200と、を有する。
The packaging container 10 has a storage box 100 for retractably storing a package 50 formed by winding a long packaging film or the like around a winding core in a roll shape, and a cutting blade 200.
収容箱100は、包装物50を収容する本体部110、および本体部110に対して回動自在に連接された蓋部120を有する。本体部110および蓋部120は、一枚の厚紙を折り曲げて一体的に形成される。
The storage box 100 has a main body 110 that houses the package 50, and a lid 120 that is rotatably connected to the main body 110. The main body 110 and the lid 120 are integrally formed by bending a sheet of cardboard.
なお、以下の説明において、「幅方向」とは、巻回された包装物の巻回軸に沿った方向であり、包装物の巻芯が伸びる方向を意味する。また、「巻回方向」とは、包装物において、幅方向に直交する方向であり、かつ、使用時に引き出される端部側から巻芯に近づく方向を意味する。また、「端部」とは、切断刃において、幅方向の端部を意味し、「外側」とは、切断刃において、歯の配列する方向における中央部側から端部側に向かう方向を意味し、「内側」とは、切断刃において、歯の配列する方向における端部側から中央部側に向かう方向を意味する。
In the following description, the "width direction" is a direction along the winding axis of the wound package, and means a direction in which the winding core of the package extends. Further, the "winding direction" means a direction orthogonal to the width direction in the package and a direction approaching the winding core from the end side drawn out during use. Further, the "end" means the end in the width direction of the cutting blade, and the "outside" means the direction of the cutting blade from the central side to the end side in the direction in which the teeth are arranged. However, "inside" means the direction from the end side to the center side in the direction in which the teeth are arranged in the cutting blade.
また、以下の説明において、「上端」とは、前板114および後板116の、底板118とは反対側の端部を意味し、「両端」とは、前板114が正面となるように包装容器10を配置したときの、包装容器を構成する各部材の左右の端部を意味する。
Further, in the following description, the "upper end" means the ends of the front plate 114 and the rear plate 116 on the opposite side of the bottom plate 118, and the "both ends" mean that the front plate 114 faces the front. It means the left and right ends of each member constituting the packaging container when the packaging container 10 is arranged.
本体部110は、一対の端板112aおよび112b、前板114および後板116、ならびに底板118を有する。本体部110は、展開図において底板118の周囲に配置された端板112aおよび112b、ならびに前板114および後板116を、底板118に対して同じ方向に屈折させて形成した、略直方体状の箱体である。本体部110は、底板118に対向する上面側に、開口面119を有する。
The main body 110 has a pair of end plates 112a and 112b, a front plate 114 and a rear plate 116, and a bottom plate 118. The main body 110 has a substantially rectangular parallelepiped shape formed by refracting the end plates 112a and 112b, and the front plate 114 and the rear plate 116 arranged around the bottom plate 118 in the developed view in the same direction with respect to the bottom plate 118. It is a box body. The main body 110 has an opening surface 119 on the upper surface side facing the bottom plate 118.
蓋部120は、後板116の上端から延出した延出部を、前板114側に屈折させることにより、後板116との連接部128に沿って回動可能に後板116に連接される。蓋部120は、蓋板122、掩蓋片124、ならびに一対の側蓋片126aおよび126b、を有する。蓋部120は、展開図において蓋板122の周囲に配置された掩蓋片124ならびに側蓋片126aおよび126bを、蓋板122に対して同じ方向に屈折させて形成される。
The lid portion 120 is rotatably connected to the rear plate 116 along the connecting portion 128 with the rear plate 116 by refracting the extending portion extending from the upper end of the rear plate 116 toward the front plate 114. To. The lid 120 has a lid plate 122, a lid piece 124, and a pair of side lid pieces 126a and 126b. The lid portion 120 is formed by refracting the lid piece 124 and the side lid pieces 126a and 126b arranged around the lid plate 122 in the developed view in the same direction with respect to the lid plate 122.
蓋板122は、開口面119と略同じ形状および大きさを有する略長方形の板状部材であり、上記連接部128に沿って回動することにより、開口面119を開閉する。掩蓋片124は、蓋板122の前端から延出した延出部を、蓋板122が開口面119を閉じたときに底板118へと向かう側に屈折させることにより、蓋板122に連接して形成された板状部材であり、蓋板122が開口面119を閉じたときに前板114の上端側領域を覆う位置に配置される。
The lid plate 122 is a substantially rectangular plate-shaped member having substantially the same shape and size as the opening surface 119, and opens and closes the opening surface 119 by rotating along the connecting portion 128. The lid piece 124 is connected to the lid plate 122 by refracting the extending portion extending from the front end of the lid plate 122 toward the bottom plate 118 when the lid plate 122 closes the opening surface 119. It is a formed plate-shaped member, and is arranged at a position where the lid plate 122 covers the upper end side region of the front plate 114 when the opening surface 119 is closed.
掩蓋片124は、蓋板122の前端から掩蓋片124の先端125aまでの長さが、蓋板122の前端の両端部から中央部に向かうにつれて長くなっていく形状を有する。これにより、掩蓋片124の先端125は、蓋板122が開口面119を閉じて掩蓋片124が前板114を覆うときに、底板118側を向いた、略V字状となる。たとえば、掩蓋片124は、蓋板122の前端のうち中央部における、前端から掩蓋片124の先端125aまでの長さが、前板114の短辺の長さの略3/4となり、蓋板122の前端のうち端部における、前端から掩蓋片124の先端125bまでの長さが、前板114の短辺の長さの略1/2となるような形状を有する。
The lid piece 124 has a shape in which the length from the front end of the lid plate 122 to the tip 125a of the lid plate 124 increases from both ends of the front end of the lid plate 122 toward the center. As a result, the tip 125 of the cover piece 124 has a substantially V shape facing the bottom plate 118 when the lid plate 122 closes the opening surface 119 and the cover piece 124 covers the front plate 114. For example, in the lid plate 124, the length from the front end to the tip 125a of the lid piece 124 at the central portion of the front end of the lid plate 122 is approximately 3/4 of the length of the short side of the front plate 114, and the lid plate It has a shape such that the length from the front end to the tip 125b of the lid piece 124 at the end of the front end of 122 is approximately ½ of the length of the short side of the front plate 114.
切断刃200は、掩蓋片124の先端125と略同一である略V字の形状を有する切断刃であり、たとえば、シーラントおよび接着剤などを介して、超音波接着により、掩蓋片124のうち先端125の内面側となる位置に、長手方向に沿って接着されて配置される。
The cutting blade 200 is a cutting blade having a substantially V shape that is substantially the same as the tip 125 of the lid piece 124, and is the tip of the lid piece 124 by ultrasonic bonding, for example, through a sealant and an adhesive. It is arranged so as to be bonded along the longitudinal direction at a position on the inner surface side of 125.
包装容器10は、蓋部120が開口面119を閉じて、掩蓋片124が前板114と対向して前板114を覆った状態で、保管される。このとき、本体部110に収容された包装物50は、その先端が開口面119から引き出され、前板114に接触する。包装物50の使用者は、蓋部120をわずかに開いた状態で包装物50である包装用フィルムなどの先端を把持し、使用量だけを引き出した後、蓋部120を閉じて、切断刃200により包装物50を切断する。このとき、掩蓋片124の中央部を親指で押さえて掩蓋片124を前板114に対して押し付けながら、包装容器10を下向きに回転させることで、包装物50である包装用フィルムなどをその中央部から切断刃200により切断することができる(中央カット)。あるいは、引き出された包装物50の幅方向端部を把持し、把持された上記幅方向端部を収容箱100に対して上向きに捻るか、または把持された上記幅方向端部に対応する収容箱100の幅方向端部を下向きに捻ることで、包装物50である包装用フィルムなどを上記幅方向端部から切断刃200により切断することができる(端カット)。
The packaging container 10 is stored with the lid 120 closing the opening surface 119 and the lid piece 124 facing the front plate 114 and covering the front plate 114. At this time, the tip of the package 50 housed in the main body 110 is pulled out from the opening surface 119 and comes into contact with the front plate 114. The user of the package 50 grasps the tip of the packaging film or the like which is the package 50 with the lid 120 slightly opened, draws out only the amount used, closes the lid 120, and cuts the blade. Cut the package 50 by 200. At this time, while pressing the central portion of the cover piece 124 with the thumb and pressing the cover piece 124 against the front plate 114, the packaging container 10 is rotated downward to move the packaging film or the like, which is the package 50, to the center thereof. It can be cut from the portion by the cutting blade 200 (center cut). Alternatively, the widthwise end of the drawn package 50 is gripped and the gripped widthwise end is twisted upward with respect to the storage box 100, or the gripped accommodation corresponding to the widthwise end. By twisting the widthwise end of the box 100 downward, the packaging film or the like, which is the package 50, can be cut from the widthwise end by the cutting blade 200 (end cut).
(切断刃)
図3は、本実施形態に関する切断刃200の模式的な構成を示す正面図である。切断刃200は、図3における切断刃200の上側領域に複数の歯が配列されており、図3における切断刃200の下側領域が掩蓋片124のうち先端125の内面側となる位置に接着されて、上記複数の歯が先端125からわずかに突出するように配置される。 (Cut blade)
FIG. 3 is a front view showing a schematic configuration of thecutting blade 200 according to the present embodiment. The cutting blade 200 has a plurality of teeth arranged in the upper region of the cutting blade 200 in FIG. 3, and is adhered to a position where the lower region of the cutting blade 200 in FIG. 3 is the inner surface side of the tip 125 of the lid piece 124. The plurality of teeth are arranged so as to slightly protrude from the tip 125.
図3は、本実施形態に関する切断刃200の模式的な構成を示す正面図である。切断刃200は、図3における切断刃200の上側領域に複数の歯が配列されており、図3における切断刃200の下側領域が掩蓋片124のうち先端125の内面側となる位置に接着されて、上記複数の歯が先端125からわずかに突出するように配置される。 (Cut blade)
FIG. 3 is a front view showing a schematic configuration of the
切断刃200は、中央エリア210、中央エリア210の外側に配置された一対の側部エリア220、および側部エリア220の外側で切断刃200の端部に配置された一対の端部エリア230を有する。中央エリア210、側部エリア220および端部エリア230は、いずれも、複数の歯が配列されてなる。なお、本実施形態において、中央エリア210は、切断刃200の幅方向における全幅の長さの5~20%の範囲であり、側部エリア220は、中央エリア210の外側の、切断刃200の幅方向における全幅の長さの50~75%の範囲であり、端部エリア230は、側部エリア220の外側の、切断刃200の幅方向における全幅の長さの10~35%の範囲である。また、本明細書において、側部エリア220および端部エリア230をあわせて「外部エリア」ともいう。
The cutting blade 200 includes a central area 210, a pair of side areas 220 arranged outside the central area 210, and a pair of end areas 230 arranged at the ends of the cutting blade 200 outside the side area 220. Have. A plurality of teeth are arranged in each of the central area 210, the side area 220, and the end area 230. In the present embodiment, the central area 210 is in the range of 5 to 20% of the total width in the width direction of the cutting blade 200, and the side area 220 is the outer side of the cutting blade 200 of the cutting blade 200. It is in the range of 50 to 75% of the total width in the width direction, and the end area 230 is in the range of 10 to 35% of the total width in the width direction of the cutting blade 200 outside the side area 220. is there. Further, in the present specification, the side area 220 and the end area 230 are collectively referred to as an “external area”.
なお、本実施形態においては、中央エリア210、側部エリア220、端部エリア230を有する構成について説明するが、端部エリア230を有さず、中央エリア210と側部エリア220からなる構成であってもよい。その場合には、中央エリア210は切断刃200の幅方向における全幅の長さの20~30%の範囲であり、側部エリア220は、中央エリア210の外側の、切断刃200の幅方向における全幅の長さの70~80%の範囲である。
In this embodiment, the configuration having the central area 210, the side area 220, and the end area 230 will be described, but the configuration does not have the end area 230 and includes the central area 210 and the side area 220. There may be. In that case, the central area 210 is in the range of 20 to 30% of the total width in the width direction of the cutting blade 200, and the side area 220 is outside the central area 210 in the width direction of the cutting blade 200. It ranges from 70 to 80% of the total width.
切断刃200は、全体として略V字の形状を有する。これにより、中央エリア210が側部エリア220よりも突出して配置されるため、中央カットの初期において中央エリア210の歯を包装物50に刺し込みやすく、中央カットをより容易に行うことができる。
The cutting blade 200 has a substantially V shape as a whole. As a result, since the central area 210 is arranged so as to protrude from the side area 220, the teeth of the central area 210 can be easily inserted into the package 50 at the initial stage of the central cut, and the central cut can be performed more easily.
(中央エリア)
図4は、中央エリア210を構成する歯を示す、図3における領域Xの部分拡大図である。切断刃200は、中央エリア210の頂点を挟んで、切断刃200の幅方向において左右対称に構成される。中央エリア210は、歯高が異なる複数の中央歯を含んでなり、上記複数の中央歯は、連続する3つの中央歯の歯先が同一直線上に位置しないように、入れ違いに配置されている。中央エリア210は、中央カットにおいて、最初に歯先が包装物50に到達する領域である。このとき、連続する3つの中央歯の歯先が同一直線上に位置しないことにより、歯高が高い中央歯から順に包装物50に到達するようにして、包装物50に同時に刺し込まれる中央歯の数を少なくすることができる。これにより、包装物50を切断するための応力は常により少ない数の中央歯にのみ分散されるため、中央エリア210におけるそれぞれの中央歯の歯先を包装物50に刺し込むことがより容易となり、中央カットの初期に、より少ない応力で包装物50の切断を開始することができる。そのため、中央エリア210は、中央カットの初期における使用者への抵抗感をより少なくすることができる。 (Central area)
FIG. 4 is a partially enlarged view of the region X in FIG. 3, showing the teeth constituting thecentral area 210. The cutting blade 200 is symmetrically configured in the width direction of the cutting blade 200 with the apex of the central area 210 interposed therebetween. The central area 210 includes a plurality of central teeth having different tooth heights, and the plurality of central teeth are arranged in a staggered manner so that the tips of the three consecutive central teeth are not located on the same straight line. .. The central area 210 is the area where the tooth tips first reach the package 50 in the central cut. At this time, since the tips of the three consecutive central teeth are not located on the same straight line, the central teeth are inserted into the package 50 at the same time so as to reach the package 50 in order from the central tooth having the highest tooth height. The number of can be reduced. This makes it easier to insert the tip of each central tooth in the central area 210 into the package 50, as the stress for cutting the package 50 is always distributed to only a smaller number of central teeth. At the beginning of the central cut, the cutting of the package 50 can be started with less stress. Therefore, the central area 210 can reduce the feeling of resistance to the user at the initial stage of the central cut.
図4は、中央エリア210を構成する歯を示す、図3における領域Xの部分拡大図である。切断刃200は、中央エリア210の頂点を挟んで、切断刃200の幅方向において左右対称に構成される。中央エリア210は、歯高が異なる複数の中央歯を含んでなり、上記複数の中央歯は、連続する3つの中央歯の歯先が同一直線上に位置しないように、入れ違いに配置されている。中央エリア210は、中央カットにおいて、最初に歯先が包装物50に到達する領域である。このとき、連続する3つの中央歯の歯先が同一直線上に位置しないことにより、歯高が高い中央歯から順に包装物50に到達するようにして、包装物50に同時に刺し込まれる中央歯の数を少なくすることができる。これにより、包装物50を切断するための応力は常により少ない数の中央歯にのみ分散されるため、中央エリア210におけるそれぞれの中央歯の歯先を包装物50に刺し込むことがより容易となり、中央カットの初期に、より少ない応力で包装物50の切断を開始することができる。そのため、中央エリア210は、中央カットの初期における使用者への抵抗感をより少なくすることができる。 (Central area)
FIG. 4 is a partially enlarged view of the region X in FIG. 3, showing the teeth constituting the
具体的には、中央エリア210は、歯高が最も大きい複数の中央大歯212、中央大歯212よりも歯高が小さい複数の中央中歯214、および中央中歯214よりも歯高が小さい中央小歯216を有する。
Specifically, the central area 210 has a plurality of central large teeth 212 having the highest tooth height, a plurality of central middle teeth 214 having a lower tooth height than the central large tooth 212, and a tooth height smaller than the central middle tooth 214. It has a central small tooth 216.
本実施形態において、図4に示すように、中央エリア210を構成する中央大歯212、中央中歯214および中央小歯216のいずれかの中央歯について、当該中央歯の内側の斜辺の延長線と、当該中央歯の内側に隣接する中央歯の外側の斜辺の延長線と、が交差する点を交差点CSとすると、中央エリア210を構成する中央大歯212、中央中歯214および中央小歯216は、すべての中央歯についての交差点CSが同一の仮想直線(以下、単に「歯底線L1」ともいう。)上に位置する形状を有する。本実施形態において、中央大歯212、中央中歯214および中央小歯216は、当該中央歯の内側の斜辺および当該中央歯の内側に隣接する中央歯の外側の斜辺が、いずれも円弧状である。外側の斜辺と内側の斜辺とは、それぞれ異なる2つの円の一部を構成する円弧により構成されており、上記外側の斜辺および内側の斜辺の延長線は、それぞれ、外側の斜辺および内側の斜辺を構成する円弧の延長線である。ただし、当該中央歯の内側の斜辺および当該中央歯の内側に隣接する中央歯の外側の斜辺は、いずれか一方が弧状であって他方が直線状であってもよいし、いずれもが直線状であってもよい。斜辺が直線状の場合には、各直線の延長線の交点を交差点CSとする。
In the present embodiment, as shown in FIG. 4, with respect to any one of the central large tooth 212, the central middle tooth 214, and the central small tooth 216 constituting the central area 210, an extension line of the inner oblique side of the central tooth is extended. Assuming that the intersection CS with the extension line of the outer oblique side of the central tooth adjacent to the inside of the central tooth is the intersection CS, the central large tooth 212, the central middle tooth 214, and the central small tooth constituting the central area 210 216 has a shape in which the intersection CS for all the central teeth is located on the same virtual straight line (hereinafter, also simply referred to as “tooth base line L1”). In the present embodiment, the central large tooth 212, the central middle tooth 214, and the central small tooth 216 have an arcuate shape on the inner hypotenuse of the central tooth and the outer hypotenuse of the central tooth adjacent to the inner side of the central tooth. is there. The outer hypotenuse and the inner hypotenuse are composed of arcs that form a part of two different circles, and the extension lines of the outer hypotenuse and the inner hypotenuse are the outer hypotenuse and the inner hypotenuse, respectively. It is an extension of the arc that constitutes. However, one of the inner hypotenuse of the central tooth and the outer hypotenuse of the central tooth adjacent to the inner side of the central tooth may be arcuate and the other linear, or both may be linear. It may be. When the hypotenuse is straight, the intersection of the extension lines of each straight line is set as the intersection CS.
また、本実施形態において、中央エリア210を構成する中央大歯212、中央中歯214および中央小歯216は、すべての中央歯について、当該中央歯の歯先と当該中央歯に隣接する中央歯の歯先とを連接する辺(以下、単に「連接辺」ともいう。)が接する、歯底線L1に平行な仮想直線との接点が、同一直線(以下、単に「歯谷線L2’」ともいう。)上に位置する形状を有する。ただし、中央大歯212、中央中歯214および中央小歯216は、すべての中央歯について上記接点が同一の歯谷線L2’上に位置しなくてもよく、中央エリア210に複数の歯谷線が設定されてもよい。
Further, in the present embodiment, the central large tooth 212, the central middle tooth 214, and the central small tooth 216 constituting the central area 210 are the tooth tips of the central teeth and the central teeth adjacent to the central teeth for all the central teeth. The point of contact with the virtual straight line parallel to the tooth bottom line L1 to which the side connecting to the tooth tip of the tooth (hereinafter, also simply referred to as "joining side") is in contact with the same straight line (hereinafter, simply "tooth valley line L2'"). It has a shape located above. However, the central large tooth 212, the central middle tooth 214, and the central small tooth 216 do not have to have the above contact points on the same tooth valley line L2'for all the central teeth, and a plurality of tooth valleys in the central area 210. A line may be set.
また、本実施形態において、すべての中央中歯214の歯先は同一の仮想直線(以下、単に「中歯線L3」ともいう。)上に位置し、すべての中央大歯212の歯先は同一の仮想直線(以下、単に「大歯線L4」ともいう。)上に位置する。直線L1、L2’、L3およびL4はすべて平行であり、中央小歯216の歯先を通り直線L3およびL4に平行な仮想直線を小歯線L5とすると、歯底線L1、歯谷線L2’、小歯線L5、中歯線L3および大歯線L4はこの順に並ぶ。
Further, in the present embodiment, the tooth tips of all the central middle teeth 214 are located on the same virtual straight line (hereinafter, also simply referred to as "middle tooth line L3"), and the tooth tips of all the central large teeth 212 are It is located on the same virtual straight line (hereinafter, also simply referred to as "large tooth line L4"). The straight lines L1, L2', L3 and L4 are all parallel, and if the virtual straight line passing through the tip of the central small tooth 216 and parallel to the straight lines L3 and L4 is the small tooth line L5, the tooth bottom line L1 and the tooth valley line L2' , Small tooth line L5, medium tooth line L3 and large tooth line L4 are arranged in this order.
中央大歯212は、中央エリア210のうち、切断刃200の中央でもあるV字の頂点となる位置に配置され(図4における中央大歯212a)、かつ、V字の頂点となる位置の両外側に複数個配置される(図4における2つの中央大歯212bおよび212c)。中央大歯212は、中央カットの初期において最初に包装物50に刺し込まれる中央歯であり、V字の頂点となる位置に配置された中央大歯212aから両外側に向けて順に刺し込まれていくことにより、包装物50の切断を開始する。これにより、より少ない応力で、中央カットの初期における切断を開始することができる。また、中央大歯212は、歯元の幅がより大きいため機械的強度が高い。そのため、複数の中央大歯212を中央エリア210に配置することで、中央エリア210の機械的強度を高めて切断刃200の耐久性を高めることもできる。
The central large tooth 212 is arranged at a position that is the apex of the V shape that is also the center of the cutting blade 200 in the central area 210 (central large tooth 212a in FIG. 4), and both of the positions that are the apex of the V shape. A plurality of teeth are arranged on the outside (two central large teeth 212b and 212c in FIG. 4). The central large tooth 212 is the central tooth that is first inserted into the package 50 at the initial stage of the central cut, and is inserted in order from the central large tooth 212a arranged at the apex of the V shape toward both outer sides. By going on, cutting of the package 50 is started. This allows cutting in the early stages of the central cut to begin with less stress. Further, the central large tooth 212 has a high mechanical strength because the width of the tooth root is larger. Therefore, by arranging the plurality of central large teeth 212 in the central area 210, the mechanical strength of the central area 210 can be increased and the durability of the cutting blade 200 can be enhanced.
中央中歯214は、中央エリア210の全体にわたって、複数個(図4では片側に4個)配置される。中央中歯214は、中央大歯212に引き続いて包装物50に刺し込まれて、包装物50の切断をさらに進行させる。このとき、中央中歯214のうちいくつかの歯(図4における2つの中央中歯214aおよび中央中歯214b)は、2つの中央大歯212に挟まれる位置に配置されることにより、歯元の幅が広い中央大歯212の幅広の谷間が切断時に包装物50に引っ掛かることによる切断への抵抗を小さくし、包装物50の切断をより容易にすることができる。また、中央中歯214のうち他のいくつかの歯(図4における2つの中央中歯214cおよび中央中歯214d)は、中央エリア210のうち側部エリア220側の領域に配置されて、包装物50の切断を、中央エリア210から側部エリア220へと円滑に移行させる。
A plurality of central middle teeth 214 (4 on one side in FIG. 4) are arranged over the entire central area 210. The central middle tooth 214 is pierced into the package 50 following the central large tooth 212 to further advance the cutting of the package 50. At this time, some of the central middle teeth 214 (two central middle teeth 214a and central middle teeth 214b in FIG. 4) are arranged at positions sandwiched between the two central large teeth 212, so that the tooth roots are formed. The wide valley of the central large tooth 212 having a wide width reduces the resistance to cutting due to being caught on the package 50 at the time of cutting, and the cutting of the package 50 can be made easier. Further, some other teeth of the central middle tooth 214 (two central middle teeth 214c and the central middle tooth 214d in FIG. 4) are arranged in the area of the central area 210 on the side area 220 side and packaged. The cutting of the object 50 is smoothly transferred from the central area 210 to the side area 220.
中央小歯216は、中央エリア210のうち側部エリア220側の領域に1個または複数個(図4では片側に1個)配置されて、中央中歯214cおよび214dとともに、包装物50の切断を、中央エリア210から側部エリア220へと円滑に移行させる。
One or more central small teeth 216 are arranged in the area of the central area 210 on the side area 220 side (one on one side in FIG. 4), and the package 50 is cut together with the central middle teeth 214c and 214d. Is smoothly transferred from the central area 210 to the side area 220.
中央エリア210を構成する中央大歯212、中央中歯214および中央小歯216は、いずれも、当該中央歯の外側の斜辺と当該中央歯の外側で隣接する中央歯の内側の斜辺とが、1つまたは複数の円弧を介して屈折点を有さずに連接されている。なお、屈折点を有さずに連接されているとは、当該歯の外側の斜辺および当該歯の外側で隣接する歯の内側の斜辺の双方と、上記円弧と、の連接点は、いずれも丸みを帯びた交点であり、傾きが不連続に変化する頂点状の折れ曲がりは形成されていないことをいう。本発明者らの知見によると、それぞれの中央歯の斜辺同士または斜辺と歯谷とが一定の角度を有するように(屈折点を有するように)連接されるときに比べ、それぞれの中央歯の斜辺が屈折点を有さずに連接されている(歯山の間に屈折点が生じない)と、破断の合流点に生じる切り欠きの進行方向がより包装物50の幅方向に近くなり、復旧時の縦裂けはより生じにくくなる。
The central large tooth 212, the central middle tooth 214, and the central small tooth 216 constituting the central area 210 all have the outer hypotenuse of the central tooth and the inner hypotenuse of the adjacent central tooth on the outside of the central tooth. It is connected via one or more arcs without a refraction point. It should be noted that the fact that they are connected without having a refraction point means that both the hypotenuse on the outside of the tooth, the hypotenuse on the inside of the adjacent tooth on the outside of the tooth, and the arc are all connected points. It is a rounded intersection, and it means that a vertex-like bend whose slope changes discontinuously is not formed. According to the findings of the present inventors, the hypotenuses of the respective central teeth or the hypotenuses and the tooth valleys are connected to each other so as to have a certain angle (to have a refraction point), as compared with the case where the hypotenuses of the respective central teeth are connected to each other. If the hypotenuses are connected without having an inflection point (no inflection point is generated between the tooth ridges), the traveling direction of the notch generated at the confluence of breaks becomes closer to the width direction of the package 50. Vertical tears during restoration are less likely to occur.
また、本実施形態において、一の中央歯の外側の斜辺と当該中央歯の外側で隣接する中央歯の内側の斜辺とを連接する上記円弧は、いずれも、その曲率半径(Rc)が0.5mm以上1.3mm以下である。上記曲率半径(Rc)が0.5mm以上であると、破断の合流点に切り欠きを生じにくくすることができ、かつ、破断の合流点に生じる切り欠きの進行方向をより包装物50の幅方向に近くして復旧時の縦裂けをより生じにくくすることができる。上記曲率半径(Rc)が1.3mm以下であると、切断時に上記円弧に包装物50が引っかかりにくくなり、切断をより容易に行うことができる。上記観点から、曲率半径Rcの好ましい範囲は0.5mm以上1.2mm以下であり、より好ましい範囲は0.6mm以上1.2mm以下である。
Further, in the present embodiment, the radius of curvature (Rc) of each of the above arcs connecting the outer hypotenuse of one central tooth and the inner hypotenuse of the adjacent central tooth on the outer side of the central tooth is 0. It is 5 mm or more and 1.3 mm or less. When the radius of curvature (Rc) is 0.5 mm or more, it is possible to make it difficult for a notch to occur at the confluence of fractures, and the traveling direction of the notch generated at the confluence of fractures is more widespread in the package 50. It can be made closer to the direction to make it less likely that vertical tears will occur during restoration. When the radius of curvature (Rc) is 1.3 mm or less, the package 50 is less likely to be caught in the arc during cutting, and cutting can be performed more easily. From the above viewpoint, the preferable range of the radius of curvature Rc is 0.5 mm or more and 1.2 mm or less, and the more preferable range is 0.6 mm or more and 1.2 mm or less.
なお、本実施形態において、中央エリア210は、外向歯を有さず、すべてが上向歯である。言い換えると、外向歯は、外部エリアのみ(本実施形態では側部エリア220のみ)に配置される。上記外向歯を有さない中央エリア210は、中央カットの切断初期に包装物50が外向歯に引っ掛ることによる切断の中断を生じにくくすることができる。
In the present embodiment, the central area 210 does not have extroverted teeth, and all of them are upward teeth. In other words, the outward teeth are arranged only in the external area (only the side area 220 in this embodiment). The central area 210 having no outward teeth can make it difficult for the package 50 to be caught in the outward teeth at the initial stage of cutting the central cut to prevent interruption of cutting.
(側部エリア)
図5は、側部エリア220を構成する側部歯を示す、図3における領域Yの部分拡大図である。側部エリア220は、歯高が同一である複数の側部歯222を含んでなり、本実施形態においては、上記複数の側部歯222は、いずれも、歯先が外側を向いた外向歯である。側部エリア220は、中央カットにおいては、中央エリア210において開始された包装物50の切断を包装物50の端部方向に進行させる領域であり、端カットにおいては、端部エリア230において開始された包装物50の切断を包装物50の中央方向に進行させる領域である。側部エリア220は、構成する複数の側部歯222がいずれも外向歯であるため、特に端カット時において包装物50に側部歯222を刺し込みやすく、包装物50が側部歯に対して横滑りしてしまうことによる斜め切れが生じにくい。 (Side area)
FIG. 5 is a partially enlarged view of the region Y in FIG. 3, showing the side teeth constituting theside area 220. The side area 220 includes a plurality of side teeth 222 having the same tooth height, and in the present embodiment, the plurality of side teeth 222 are all outward teeth having tooth tips facing outward. Is. The side area 220 is a region in which the cutting of the package 50 started in the central area 210 proceeds toward the end of the package 50 in the central cut, and is started in the end area 230 in the end cut. This is a region where the cutting of the package 50 is advanced toward the center of the package 50. In the side area 220, since the plurality of side teeth 222 constituting the side area 220 are all outward teeth, it is easy to insert the side teeth 222 into the package 50 particularly at the time of edge cutting, and the package 50 is relative to the side teeth. Diagonal cutting is unlikely to occur due to skidding.
図5は、側部エリア220を構成する側部歯を示す、図3における領域Yの部分拡大図である。側部エリア220は、歯高が同一である複数の側部歯222を含んでなり、本実施形態においては、上記複数の側部歯222は、いずれも、歯先が外側を向いた外向歯である。側部エリア220は、中央カットにおいては、中央エリア210において開始された包装物50の切断を包装物50の端部方向に進行させる領域であり、端カットにおいては、端部エリア230において開始された包装物50の切断を包装物50の中央方向に進行させる領域である。側部エリア220は、構成する複数の側部歯222がいずれも外向歯であるため、特に端カット時において包装物50に側部歯222を刺し込みやすく、包装物50が側部歯に対して横滑りしてしまうことによる斜め切れが生じにくい。 (Side area)
FIG. 5 is a partially enlarged view of the region Y in FIG. 3, showing the side teeth constituting the
本明細書において、図5に示すように、側部エリア220を構成する側部歯222(外向歯)の一つをT1とし、側部歯T1の外側に隣接して配置された隣接歯をT2とし、側部歯T1の内側に隣接して配置された隣接歯をT3とする。また、図5に示すように、側部歯T1の外側の斜辺の延長線と隣接歯T2の内側の斜辺の延長線とが交差する点を交差点S1とし、側部歯T1の内側の斜辺の延長線と隣接歯T3の外側の斜辺の延長線とが交差する点を交差点S2とする。
In the present specification, as shown in FIG. 5, one of the side teeth 222 (extrovert teeth) constituting the side area 220 is T1, and the adjacent teeth arranged adjacent to the outside of the side teeth T1 are designated as T1. Let T2 be, and let T3 be an adjacent tooth arranged adjacent to the inside of the side tooth T1. Further, as shown in FIG. 5, the point where the extension line of the outer hypotenuse of the side tooth T1 and the extension line of the inner hypotenuse of the adjacent tooth T2 intersect is defined as the intersection S1 and the inner hypotenuse of the side tooth T1. The point where the extension line and the extension line of the outer hypotenuse of the adjacent tooth T3 intersect is defined as the intersection S2.
また、交差点S1と交差点S2とを結ぶ仮想直線(本実施形態では、歯底線L1と同一の直線である)に対して側部歯T1の歯先から垂ろした垂線が上記仮想直線(歯底線L1)と交差する点を交差点S3とする。また、S1とS3との間の距離をD1とし、S1とS2との間の距離をD2とする。
Further, the perpendicular line drawn from the tip of the side tooth T1 with respect to the virtual straight line connecting the intersection S1 and the intersection S2 (in the present embodiment, the same straight line as the tooth bottom line L1) is the above virtual straight line (tooth bottom line). The point that intersects with L1) is designated as the intersection S3. Further, the distance between S1 and S3 is D1, and the distance between S1 and S2 is D2.
このとき、本実施形態において、D1とD2との比率は、以下の式1を満たす。
D1/D2 =0.20以上0.40以下 ・・・(式1) At this time, in the present embodiment, the ratio of D1 and D2 satisfies the followingformula 1.
D1 / D2 = 0.20 or more and 0.40 or less ... (Equation 1)
D1/D2 =0.20以上0.40以下 ・・・(式1) At this time, in the present embodiment, the ratio of D1 and D2 satisfies the following
D1 / D2 = 0.20 or more and 0.40 or less ... (Equation 1)
D1/D2が0.40以下であると、側部歯T1(外向歯)の歯先がより外側を向くため、端カット時において、より少ない応力で包装物50に側部歯T1を刺し込むことができ、包装物50の切断を容易に進行させることができる。そのため、端カット時に側部歯T1が包装物50に対して十分に刺し込まれず、包装物50が側部歯に対して横滑りしてしまうことによる斜め切れの発生を抑制することができる。D1/D2が0.20以上であると、側部歯T1(外向歯)の歯先が外側を向きすぎないため、中央カット時において、中央エリア210において開始された包装物50の切断の進行が側部歯T1によって阻害されにくく、上記切断が端部方向へとより進行しやすくなる。また、これにより、端カット時における斜め切れの発生を抑制することができる。端カットと中央カットのどちらからでもよく切れるより好ましい範囲は、D1/D2=0.25以上0.38以下であり、さらに好ましい範囲は、D1/D2=0.26以上0.37以下である。
When D1 / D2 is 0.40 or less, the tip of the side tooth T1 (outward tooth) faces more outward, so that the side tooth T1 is inserted into the package 50 with less stress at the time of edge cutting. This allows the cutting of the package 50 to proceed easily. Therefore, it is possible to suppress the occurrence of diagonal cutting due to the side teeth T1 not being sufficiently pierced into the package 50 at the time of edge cutting and the package 50 skidding with respect to the side teeth. When D1 / D2 is 0.20 or more, the tooth tips of the side teeth T1 (outward teeth) do not face too outward, so that the cutting progress of the package 50 started in the central area 210 at the time of the central cut. Is less likely to be blocked by the side teeth T1 and the cutting is more likely to proceed in the end direction. Further, this makes it possible to suppress the occurrence of diagonal cutting at the time of edge cutting. A more preferable range that can be cut well from either the edge cut or the center cut is D1 / D2 = 0.25 or more and 0.38 or less, and a more preferable range is D1 / D2 = 0.26 or more and 0.37 or less. ..
なお、本明細書において、中央歯、側部歯および端部歯のすべてについて、「外向歯」とは、当該歯をT1として上記方法で算出されたD1/D2が0.50未満である歯を意味し、「上向歯」とは、D1/D2が0.50以上(好ましくは0.75以下)である歯を意味する。
In the present specification, for all of the central tooth, the lateral tooth and the end tooth, the "external tooth" is a tooth having D1 / D2 calculated by the above method with the tooth as T1 and having a D1 / D2 of less than 0.50. The term "upward tooth" means a tooth having a D1 / D2 of 0.50 or more (preferably 0.75 or less).
側部エリア220を構成する複数の側部歯222(外向歯)は、いずれも、当該側部歯(外向歯)の外側の斜辺と当該側部歯の外側で隣接する側部歯(外向歯)の内側の斜辺とが、1つまたは複数の円弧を介して屈折点を有さずに連接されている。これにより、包装物50の切断が斜辺に沿って発生し、巻回体方向に進行しにくくなることで、切り欠き(亀裂)の進行方向がより包装物50の幅方向に近くなり、復旧時に券回体方向への縦裂けが生じにくくなり、巻き戻り時の復旧はより容易になる。
The plurality of side teeth 222 (extrovert teeth) constituting the side area 220 are all adjacent side teeth (extrovert teeth) on the outer hypotenuse of the side teeth (extrovert teeth) and outside the side teeth. ) Is connected to the inner hypotenuse via one or more arcs without having an inflection point. As a result, cutting of the package 50 occurs along the hypotenuse, and it becomes difficult for the package 50 to proceed in the direction of the wound body. Therefore, the direction of travel of the notch (crack) becomes closer to the width direction of the package 50, and at the time of restoration. Vertical tearing in the direction of the ticket rotation is less likely to occur, and recovery at the time of rewinding becomes easier.
本実施形態において、側部歯T1の外側の斜辺と隣接歯T2の内側の斜辺とを連接する上記円弧は、いずれの側部歯についても、その曲率半径(R1)が0.3mm以上1.3mm以下である。上記曲率半径(R1)が0.3mm以上であると、破断の合流点に縦裂けを生じにくくして、巻き戻り時の復旧をより容易に行うことができる。上記曲率半径(R1)が1.3mm以下であると、上記円弧に包装物50が引っかかりにくくなり、中央カットおよび端カットのいずれにおいても、切断をより容易に行うことができる。上記観点から、曲率半径R1の好ましい範囲は0.35mm以上1.2mm以下であり、より好ましい範囲は0.35mm以上1.0mm以下である。
In the present embodiment, the arc connecting the outer hypotenuse of the side tooth T1 and the inner hypotenuse of the adjacent tooth T2 has a radius of curvature (R1) of 0.3 mm or more for any of the side teeth. It is 3 mm or less. When the radius of curvature (R1) is 0.3 mm or more, vertical tears are less likely to occur at the confluence of fractures, and recovery at the time of rewinding can be performed more easily. When the radius of curvature (R1) is 1.3 mm or less, the package 50 is less likely to be caught in the arc, and cutting can be performed more easily in both the center cut and the edge cut. From the above viewpoint, the preferable range of the radius of curvature R1 is 0.35 mm or more and 1.2 mm or less, and the more preferable range is 0.35 mm or more and 1.0 mm or less.
なお、側部歯T1の外側の斜辺の曲率半径Rは、1.0mm以上10.0mm以下であることが好ましく、1.5mm以上8.0mm以下であることがより好ましい。また、隣接歯T2の内側の斜辺の曲率半径Rは、1.0mm以上7.0mm以下であることが好ましく、1.5mm以上6.0mm以下であることがより好ましい。各曲率半径を上記の値にすることで、連接辺の底部近辺が切断時に包装物50に引っ掛かることによる切断への抵抗を小さくして包装物50の切断をより容易にし、かつ、破断の合流点に縦裂けを生じにくくして、巻き戻り時の復旧をより容易に行うことができる。
The radius of curvature R of the outer oblique side of the side tooth T1 is preferably 1.0 mm or more and 10.0 mm or less, and more preferably 1.5 mm or more and 8.0 mm or less. The radius of curvature R of the inner oblique side of the adjacent tooth T2 is preferably 1.0 mm or more and 7.0 mm or less, and more preferably 1.5 mm or more and 6.0 mm or less. By setting each radius of curvature to the above value, the resistance to cutting due to the vicinity of the bottom of the connecting side being caught by the package 50 during cutting is reduced, the package 50 can be cut more easily, and the merging of breaks. Vertical tears are less likely to occur at the points, and recovery at the time of rewinding can be performed more easily.
なお、本実施形態において、側部歯T1の歯先と隣接歯T2の歯先とを結ぶ連接辺に接する、歯底線L1に平行な仮想直線は、歯谷線L2’と平行な、歯谷線L2’とは異なる直線(以下、単に「歯谷線L2」ともいう。)である。本実施形態において、歯谷線L2は、歯谷線L2’と小歯線L5との間に位置する(図4参照)。また、側部歯222(外向歯)の歯先を結ぶ仮想直線は、中歯線L3と同一の直線である。なお、側部歯の歯先を結ぶ仮想直線の位置は特に限定されず、小歯線L5と同一の直線、または小歯線L5より高く大歯線L4より低い位置の直線、となればよい。なお、図5では、すべての側部歯の歯先が中歯線L3上に位置しているが、すべての側部歯の歯先が同一の仮想直線(図5では中歯線L3)上に位置しなくてもよい。言い換えると、側部エリア220は、歯底線L1から側部歯の歯先までの距離が異なる複数の側部歯を有してもよい。
In the present embodiment, the virtual straight line parallel to the tooth bottom line L1 that is in contact with the connecting side connecting the tooth tip of the side tooth T1 and the tooth tip of the adjacent tooth T2 is a tooth valley parallel to the tooth valley line L2'. It is a straight line different from the line L2'(hereinafter, also simply referred to as "tooth valley line L2"). In the present embodiment, the tooth valley line L2 is located between the tooth valley line L2'and the small tooth line L5 (see FIG. 4). Further, the virtual straight line connecting the tooth tips of the side teeth 222 (extroverted teeth) is the same straight line as the middle tooth line L3. The position of the virtual straight line connecting the tooth tips of the side teeth is not particularly limited, and may be the same straight line as the small tooth line L5 or a straight line higher than the small tooth line L5 and lower than the large tooth line L4. .. In addition, in FIG. 5, the tooth tips of all the side teeth are located on the middle tooth line L3, but the tooth tips of all the side teeth are on the same virtual straight line (middle tooth line L3 in FIG. 5). It does not have to be located in. In other words, the side area 220 may have a plurality of side teeth having different distances from the bottom line L1 to the tooth tips of the side teeth.
(端部エリア)
図6は、端部エリア230を構成する歯を示す、図3における領域Zの部分拡大図である。端部エリア230は、歯高が異なる複数の端部歯を含んでなり、本実施形態においては、上記複数の端部歯は、いずれも上向歯である。また、上記複数の端部歯は、連続する3つの端部歯の歯先が同一直線上に位置しないように、入れ違いに配置されている。端部エリア230は、端カットにおいて、最初に歯先が包装物50に到達する領域である。このとき、連続する3つの端部歯の歯先が同一直線上に位置しないことにより、歯高が高い端部歯から順に包装物50に到達するようにして、同時に包装物50に刺し込まれる端部歯の数を少なくすることができる。これにより、包装物50を切断するための応力は常により少ない数の端部歯にのみ分散されるため、端部エリア230における端部歯の歯先を包装物50に刺し込むことがより容易となり、端カットの初期に、より少ない応力で包装物50の切断を開始することができる。そのため、端部エリア230は、端カットの初期における使用者への抵抗感をより少なくすることができる。 (End area)
FIG. 6 is a partially enlarged view of the region Z in FIG. 3, showing the teeth constituting theend area 230. The end area 230 includes a plurality of end teeth having different tooth heights, and in the present embodiment, the plurality of end teeth are all upward teeth. Further, the plurality of end teeth are arranged in a staggered manner so that the tips of the three consecutive end teeth are not located on the same straight line. The end area 230 is the area where the tooth tips first reach the package 50 in the end cut. At this time, since the tips of the three consecutive end teeth are not located on the same straight line, the end teeth having the highest tooth height are reached in order from the end teeth, and are simultaneously pierced into the package 50. The number of end teeth can be reduced. As a result, the stress for cutting the package 50 is always distributed to only a smaller number of end teeth, making it easier to insert the tips of the end teeth in the end area 230 into the package 50. Therefore, it is possible to start cutting the package 50 with less stress at the initial stage of edge cutting. Therefore, the end area 230 can reduce the feeling of resistance to the user at the initial stage of the end cut.
図6は、端部エリア230を構成する歯を示す、図3における領域Zの部分拡大図である。端部エリア230は、歯高が異なる複数の端部歯を含んでなり、本実施形態においては、上記複数の端部歯は、いずれも上向歯である。また、上記複数の端部歯は、連続する3つの端部歯の歯先が同一直線上に位置しないように、入れ違いに配置されている。端部エリア230は、端カットにおいて、最初に歯先が包装物50に到達する領域である。このとき、連続する3つの端部歯の歯先が同一直線上に位置しないことにより、歯高が高い端部歯から順に包装物50に到達するようにして、同時に包装物50に刺し込まれる端部歯の数を少なくすることができる。これにより、包装物50を切断するための応力は常により少ない数の端部歯にのみ分散されるため、端部エリア230における端部歯の歯先を包装物50に刺し込むことがより容易となり、端カットの初期に、より少ない応力で包装物50の切断を開始することができる。そのため、端部エリア230は、端カットの初期における使用者への抵抗感をより少なくすることができる。 (End area)
FIG. 6 is a partially enlarged view of the region Z in FIG. 3, showing the teeth constituting the
一方で、端部エリア230は、中央カットにおいて、包装物50の切断が最後に行われる領域である。このときも、端部エリア230は、包装容器10を下向きに回転させたときに、それぞれの端部歯を順次包装物50に刺し込ませて、中央エリア210から側部エリア220へと進行してきた包装物50の切断を円滑に進行させることができる。
On the other hand, the end area 230 is the area where the package 50 is finally cut in the central cut. Also at this time, when the packaging container 10 is rotated downward, the end area 230 advances from the central area 210 to the side area 220 by sequentially inserting the respective end teeth into the package 50. The cutting of the package 50 can proceed smoothly.
具体的には、端部エリア230は、歯高が大きい複数の端大歯232、および端大歯232よりも歯高が小さい複数の端中歯234を有する。
Specifically, the end area 230 has a plurality of large end teeth 232 having a large tooth height, and a plurality of middle end teeth 234 having a tooth height smaller than that of the large end teeth 232.
本実施形態では、端大歯232は、端部エリア230に複数個(図6における2つの端大歯232aおよび232b)配置される。端大歯232は、端カットの初期において最初に包装物50に刺し込まれる歯であり、切断刃200の端部となる位置に配置された端大歯232から中央部側に向けて順に刺し込まれていくことにより、包装物50の切断を開始する。これにより、より少ない応力で、端カットの初期における切断を開始することができる。また、端大歯232は、歯元の幅がより大きいため機械的強度が高い。そのため、複数の端大歯232を端部エリア230に配置することで、端部エリア230の機械的強度を高めて切断刃200の耐久性を高めることもできる。
In the present embodiment, a plurality of large end teeth 232 are arranged in the end area 230 (two large end teeth 232a and 232b in FIG. 6). The large end tooth 232 is the tooth that is first inserted into the package 50 at the initial stage of end cutting, and is inserted in order from the large end tooth 232 arranged at the position to be the end of the cutting blade 200 toward the center side. By being incorporated, cutting of the package 50 is started. This allows cutting in the early stages of edge cutting to begin with less stress. Further, the large end tooth 232 has a high mechanical strength because the width of the tooth root is larger. Therefore, by arranging the plurality of large end teeth 232 in the end area 230, the mechanical strength of the end area 230 can be increased and the durability of the cutting blade 200 can be improved.
端中歯234は、端大歯232に引き続いて包装物50に刺し込まれて、包装物50の切断をさらに進行させる。端中歯234のうちいくつかの端中歯(図6における端中歯234a)は、2つの端大歯232に挟まれる位置に配置されることにより、歯元の幅が広い端大歯232の幅広の谷間が切断時に包装物50に引っ掛かることによる切断への抵抗を小さくし、包装物50の切断をより容易にすることができる。また、端中歯234のうち他の端中歯(図6における端中歯234b)は、端部エリア230のうち側部エリア220側の領域に配置されて、包装物50の切断を、端部エリア230から側部エリア220へと円滑に移行させる。
The end middle tooth 234 is pierced into the package 50 following the end large tooth 232 to further advance the cutting of the package 50. Some of the end middle teeth 234 (end middle teeth 234a in FIG. 6) are arranged at positions sandwiched between the two end large teeth 232, so that the end large teeth 232 having a wide tooth base are arranged. The wide valley of the sill can reduce the resistance to cutting due to being caught on the package 50 at the time of cutting, and can make the cutting of the package 50 easier. Further, the other end middle teeth (end middle teeth 234b in FIG. 6) of the end middle teeth 234 are arranged in the area of the end area 230 on the side area 220 side to cut the package 50 at the end. The smooth transition from the part area 230 to the side area 220.
端部エリア230を構成する端大歯232および端中歯234は、いずれも、当該端部歯の外側の斜辺と当該端部歯の外側で隣接する端部歯の内側の斜辺とが、1つまたは複数の円弧を介して屈折点を有さずに連接されている。上述したように、それぞれの端部歯の斜辺が円弧を介して連接されていると、破断の合流点に縦裂けを生じにくくして、巻き戻り時の復旧をより容易に行うことができる。
In both the large end tooth 232 and the middle end tooth 234 constituting the end area 230, the outer hypotenuse of the end tooth and the inner hypotenuse of the adjacent end tooth on the outside of the end tooth are 1. It is connected via one or more arcs without a refraction point. As described above, when the hypotenuses of the respective end teeth are connected via an arc, vertical tearing is less likely to occur at the confluence of fractures, and recovery at the time of rewinding can be performed more easily.
本実施形態において、端部歯の外側の斜辺の曲率半径Rは、いずれも、1.0mm以上10.0mm以下であることが好ましく、1.5mm以上8.0mm以下であることがより好ましい。また、上記端部歯に隣接する歯の内側の斜辺の曲率半径Rは、1.0mm以上7.0mm以下であることが好ましく、1.5mm以上6.0mm以下であることがより好ましい。各曲率半径を上記の値にすることで、連接辺の底部近辺が切断時に包装物50に引っ掛かることによる切断への抵抗を小さくして包装物50の切断をより容易にし、フィルム破断の合流点に生じる切り欠きの進行方向を包装物50の幅方向により近くして、巻き戻ってしまった包装物を復旧させる時(復旧時)の縦裂けを生じ難くさせることができる。
In the present embodiment, the radius of curvature R of the outer oblique side of the end tooth is preferably 1.0 mm or more and 10.0 mm or less, and more preferably 1.5 mm or more and 8.0 mm or less. The radius of curvature R of the inner oblique side of the tooth adjacent to the end tooth is preferably 1.0 mm or more and 7.0 mm or less, and more preferably 1.5 mm or more and 6.0 mm or less. By setting each radius of curvature to the above value, the resistance to cutting due to the vicinity of the bottom of the connecting side being caught by the package 50 during cutting is reduced, the package 50 can be cut more easily, and the confluence of film breaks. By making the traveling direction of the notch generated in the package 50 closer to the width direction of the package 50, it is possible to make it difficult for vertical tears to occur when the package that has been rewound is restored (during restoration).
また、本実施形態において、一の端部歯の外側の斜辺と当該端部歯の外側で隣接する端部歯の内側の斜辺とを連接する上記円弧は、いずれも、その曲率半径(R2)が0.3mm以上1.3mm以下である。上記曲率半径(R2)が0.3mm以上であると、破断の合流点に切り欠きを生じにくくすることができる。上記曲率半径(R2)が1.3mm以下であると、端部カットの初期や中央カットの最後の切断時に、上記円弧に包装物50が引っかかりにくくなり、包装物50の切断をより容易に行うことができる。上記観点から、曲率半径R2の好ましい範囲は0.4mm以上1.2mm以下であり、より好ましい範囲は0.5mm以上1.2mm以下である。
Further, in the present embodiment, the arcs connecting the outer hypotenuse of one end tooth and the inner hypotenuse of the adjacent end tooth on the outside of the end tooth are all the radius of curvature (R2). Is 0.3 mm or more and 1.3 mm or less. When the radius of curvature (R2) is 0.3 mm or more, it is possible to make it difficult for a notch to occur at the confluence of fractures. When the radius of curvature (R2) is 1.3 mm or less, the package 50 is less likely to be caught in the arc at the initial stage of the end cut or the final cut of the center cut, and the package 50 can be cut more easily. be able to. From the above viewpoint, the preferable range of the radius of curvature R2 is 0.4 mm or more and 1.2 mm or less, and the more preferable range is 0.5 mm or more and 1.2 mm or less.
なお、本実施形態において、図6に示すように、端部エリア230を構成する端大歯232および端中歯234のいずれかの端部歯について、当該端部歯の内側の斜辺の延長線と、当該端部歯の内側に隣接する端部歯の外側の斜辺の延長線と、が交差する点を交差点PSとすると、端部エリア230を構成する端大歯232および端中歯234は、すべての端部歯についての交差点PSが歯底線L1上に位置する形状を有する。また、端部エリア230を構成する端大歯232および端中歯234のすべての端部歯について、当該端部歯の歯先と当該端部歯の外側で隣接する端部歯の歯先とを結ぶ連接辺は、歯谷線L2と平行な、歯谷線L2とは異なる直線(以下、単に「歯谷線L2’’」ともいう。)に接する形状を有する。ただし、端大歯232および端中歯234は、すべての歯について上記接点が同一の歯谷線L2’’上に位置しなくてもよく、端部エリア230に複数の歯谷線が設定されてもよい。本実施形態において、歯谷線L2’’は、歯谷線L2と歯底線L1との間に位置する(図6参照)。また、端大歯232の歯先を結ぶ仮想直線は、大歯線L4と同一の直線であり、端中歯234の歯先を結ぶ仮想直線は、中歯線L3と同一の直線である。なお、端大歯232の歯先を結ぶ仮想直線の位置は特に限定されず、中歯線L3より高い位置の直線となればよい。また、端中歯234の歯先を結ぶ仮想直線の位置も特に限定されず、中歯線L3と同一の直線、または小歯線L5より高く大歯線L4より低い位置の直線、となればよい。
In the present embodiment, as shown in FIG. 6, for any of the end teeth 232 and the end middle teeth 234 constituting the end area 230, an extension line of the inner oblique side of the end teeth is extended. Assuming that the point where the extension line of the outer oblique side of the end tooth adjacent to the inside of the end tooth intersects is the intersection PS, the end large tooth 232 and the end middle tooth 234 constituting the end area 230 are , The intersection PS for all end teeth has a shape located on the root line L1. Further, for all the end teeth of the large end tooth 232 and the middle end tooth 234 constituting the end area 230, the tip of the end tooth and the tip of the end tooth adjacent to the outside of the end tooth The connecting side connecting the two has a shape parallel to the tooth valley line L2 and in contact with a straight line different from the tooth valley line L2 (hereinafter, also simply referred to as “tooth valley line L2''”). However, the large end tooth 232 and the middle end tooth 234 do not have to have the above contact points on the same tooth valley line L2'' for all teeth, and a plurality of tooth valley lines are set in the end area 230. You may. In the present embodiment, the tooth valley line L2 ″ is located between the tooth valley line L2 and the tooth bottom line L1 (see FIG. 6). Further, the virtual straight line connecting the tooth tips of the end large tooth 232 is the same straight line as the large tooth line L4, and the virtual straight line connecting the tooth tips of the end middle tooth 234 is the same straight line as the middle tooth line L3. The position of the virtual straight line connecting the tooth tips of the large end teeth 232 is not particularly limited, and may be a straight line at a position higher than the middle tooth line L3. Further, the position of the virtual straight line connecting the tooth tips of the end middle teeth 234 is not particularly limited, and if it is the same straight line as the middle tooth line L3 or a straight line higher than the small tooth line L5 and lower than the large tooth line L4. Good.
[第2の実施形態]
図7は、本発明の第2の実施形態に関する切断刃300の模式的な構成を示す正面図である。切断刃300は、第1の実施形態における切断刃200と同様に、中央エリア310、中央エリア310の外側に配置された一対の側部エリア320、および側部エリア320の外側で切断刃300の端部に配置された一対の端部エリア330を有する。本実施形態に関する切断刃300は、側部エリア320および端部エリア330を構成する歯の形状のみが第1の実施形態における切断刃300とは異なる。そのため、以下、第1の実施形態における切断刃300との共通点については説明を省略する。 [Second Embodiment]
FIG. 7 is a front view showing a schematic configuration of thecutting blade 300 according to the second embodiment of the present invention. Similar to the cutting blade 200 in the first embodiment, the cutting blade 300 has a central area 310, a pair of side areas 320 arranged outside the central area 310, and a cutting blade 300 outside the side area 320. It has a pair of end areas 330 arranged at the ends. The cutting blade 300 according to the present embodiment is different from the cutting blade 300 in the first embodiment only in the shape of the teeth constituting the side area 320 and the end area 330. Therefore, the description of the common points with the cutting blade 300 in the first embodiment will be omitted below.
図7は、本発明の第2の実施形態に関する切断刃300の模式的な構成を示す正面図である。切断刃300は、第1の実施形態における切断刃200と同様に、中央エリア310、中央エリア310の外側に配置された一対の側部エリア320、および側部エリア320の外側で切断刃300の端部に配置された一対の端部エリア330を有する。本実施形態に関する切断刃300は、側部エリア320および端部エリア330を構成する歯の形状のみが第1の実施形態における切断刃300とは異なる。そのため、以下、第1の実施形態における切断刃300との共通点については説明を省略する。 [Second Embodiment]
FIG. 7 is a front view showing a schematic configuration of the
後述するように、本実施形態において、切断刃300は、中央エリア310、側部エリア320(側部接続領域320aおよび側部メイン領域320b)、ならびに端部エリア330(端部接続領域330aおよび端部メイン領域330b)を有する。中央エリア310は、切断刃300の幅方向における全幅の長さの5~20%の範囲であり、側部接続領域320aは、中央エリア310の外側の、切断刃300の幅方向における全幅の長さの10~20%の範囲であり、側部メイン領域320bは、側部接続領域320aの外側の、切断刃200の幅方向における全幅の長さの35~50%の範囲であり、端部接続領域330aは、側部メイン領域320bの外側の、切断刃300の幅方向における全幅の長さの5~10%の範囲であり、端部メイン領域330bは、端部接続領域330aの外側の、切断刃300の幅方向における全幅の長さの10~25%の範囲である。
As will be described later, in the present embodiment, the cutting blade 300 includes a central area 310, a side area 320 (side connection area 320a and a side main area 320b), and an end area 330 (end connection area 330a and end). It has a main main area 330b). The central area 310 is in the range of 5 to 20% of the total width in the width direction of the cutting blade 300, and the side connection area 320a is the length of the total width in the width direction of the cutting blade 300 outside the central area 310. The side main area 320b is the range of 35 to 50% of the total width in the width direction of the cutting blade 200 outside the side connection area 320a, and is in the range of 10 to 20%. The connection area 330a is a range of 5 to 10% of the total width in the width direction of the cutting blade 300 outside the side main area 320b, and the end main area 330b is outside the end connection area 330a. , The range is 10 to 25% of the total width of the cutting blade 300 in the width direction.
なお、本実施形態においては、中央エリア310、側部エリア320、端部エリア330を有する構成について説明するが、端部エリア330を有さず、中央エリア310と側部エリア320からなる構成であってもよい。その場合には、中央エリア310は切断刃300の幅方向における全幅の長さの20~30%の範囲であり、側部エリア320は、中央エリア310の外側の、切断刃300の幅方向における全幅の長さの70~80%の範囲である。
In the present embodiment, the configuration having the central area 310, the side area 320, and the end area 330 will be described, but the configuration does not have the end area 330 and includes the central area 310 and the side area 320. There may be. In that case, the central area 310 is in the range of 20 to 30% of the total width in the width direction of the cutting blade 300, and the side area 320 is outside the central area 310 in the width direction of the cutting blade 300. It ranges from 70 to 80% of the total width.
(中央エリア)
中央エリア310は、歯高が最も大きい複数の中央大歯312、中央大歯312よりも歯高が小さい複数の中央中歯314、および中央中歯314よりも歯高が小さい中央小歯316を有する。これらの中央歯は、第1の実施形態と同様なので、詳しい説明は省略する。 (Central area)
Thecentral area 310 includes a plurality of central large teeth 312 having the highest tooth height, a plurality of central middle teeth 314 having a tooth height smaller than that of the central large tooth 312, and a central small tooth 316 having a tooth height smaller than that of the central middle tooth 314. Have. Since these central teeth are the same as those in the first embodiment, detailed description thereof will be omitted.
中央エリア310は、歯高が最も大きい複数の中央大歯312、中央大歯312よりも歯高が小さい複数の中央中歯314、および中央中歯314よりも歯高が小さい中央小歯316を有する。これらの中央歯は、第1の実施形態と同様なので、詳しい説明は省略する。 (Central area)
The
(側部エリア)
図7に示すように、本実施形態において、側部エリア320は、中央エリア310との接続領域である側部接続領域320aと、複数の外向歯を有する側部メイン領域320bと、を有する。 (Side area)
As shown in FIG. 7, in the present embodiment, theside area 320 has a side connection area 320a which is a connection area with the central area 310 and a side main area 320b having a plurality of outward teeth.
図7に示すように、本実施形態において、側部エリア320は、中央エリア310との接続領域である側部接続領域320aと、複数の外向歯を有する側部メイン領域320bと、を有する。 (Side area)
As shown in FIG. 7, in the present embodiment, the
図8は、中央エリア310と側部エリア320(側部接続領域320a)との境界付近を構成する歯を示す、図7における領域Sの部分拡大図である。図9は、側部接続領域320aと側部メイン領域320bとの境界付近を構成する歯を示す、図7における領域Tの部分拡大図である。
FIG. 8 is a partially enlarged view of the region S in FIG. 7, showing the teeth constituting the vicinity of the boundary between the central area 310 and the side area 320 (side connection region 320a). FIG. 9 is a partially enlarged view of the region T in FIG. 7, showing the teeth forming the vicinity of the boundary between the side connection region 320a and the side main region 320b.
側部接続領域320aは、歯高が同一である複数の側部歯322aを含んでなり、上記複数の側部歯322aは、いずれも上向歯である。複数の上向歯からなる側部接続領域320aは、同様に上向歯からなる中央エリア310との間で包装物50の切断を進行させやすく、かつ、歯高が同一である側部メイン領域320bとの間でも包装物50の切断を進行させやすい。そのため、側部接続領域320aは、中央カットによる包装物50の切断を中央エリア310から側部メイン領域320bへと進行させやすくし、かつ、端カットによる包装物50の切断を側部メイン領域320bから中央エリア310へと進行させやすくする。
The side connection region 320a includes a plurality of side teeth 322a having the same tooth height, and the plurality of side teeth 322a are all upward teeth. The side connection region 320a composed of the plurality of upward teeth is a side main region in which the cutting of the package 50 is likely to proceed with the central area 310 composed of the upward teeth and the tooth height is the same. It is easy to proceed with cutting of the package 50 even with the 320b. Therefore, the side connection area 320a facilitates the cutting of the package 50 by the central cut from the central area 310 to the side main area 320b, and the cutting of the package 50 by the end cut is performed by the side main area 320b. To facilitate progress from to the central area 310.
側部接続領域320aを構成する複数の側部歯322aは、いずれも、当該側部歯の外側の斜辺と当該側部歯の外側で隣接する側部歯の内側の斜辺とが、1つまたは複数の円弧を介して屈折点を有さずに連接されている。これにより、包装物50の切断時に切断刃が包装物50に引っ掛かりにくくなり、縦裂けが生じにくくなるため、巻き戻り時の復旧はより容易になる。
In each of the plurality of side teeth 322a constituting the side connection region 320a, one or the inner hypotenuse of the side tooth adjacent to the outside of the side tooth is present. It is connected via a plurality of arcs without having a refraction point. As a result, the cutting blade is less likely to be caught in the package 50 when the package 50 is cut, and vertical tearing is less likely to occur, so that recovery at the time of rewinding becomes easier.
また、本実施形態においても、側部歯322aの外側の斜辺と当該側部歯の外側で隣接する側部歯の内側の斜辺とを連接する上記円弧は、いずれの側部歯(外向歯および上向歯の両方)についても、その曲率半径(R1’)が0.3mm以上1.3mm以下である。上記曲率半径(R1’)が0.3mm以上であると、破断の合流点に縦裂けを生じにくくして、巻き戻り時の復旧をより容易に行うことができる。上記曲率半径(R1’)が1.3mm以下であると、上記円弧に包装物50が引っかかりにくくなり、中央カットおよび端カットのいずれにおいても、切断をより容易に行うことができる。上記観点から、曲率半径R1’の好ましい範囲は0.35mm以上1.2mm以下であり、より好ましい範囲は0.35mm以上1.0mm以下である。
Further, also in the present embodiment, the arc connecting the outer hypotenuse of the side tooth 322a and the inner hypotenuse of the adjacent side tooth on the outside of the side tooth is any side tooth (external tooth and The radius of curvature (R1') of both the upward teeth) is 0.3 mm or more and 1.3 mm or less. When the radius of curvature (R1') is 0.3 mm or more, vertical tears are less likely to occur at the confluence of fractures, and recovery at the time of rewinding can be performed more easily. When the radius of curvature (R1') is 1.3 mm or less, the package 50 is less likely to be caught in the arc, and cutting can be performed more easily in both the center cut and the edge cut. From the above viewpoint, the preferable range of the radius of curvature R1'is 0.35 mm or more and 1.2 mm or less, and the more preferable range is 0.35 mm or more and 1.0 mm or less.
側部メイン領域320bは、歯高が同一である複数の側部歯322bを含んでなり、上記複数の側部歯は、いずれも外向歯である。複数の外向歯を有する側部メイン領域320bは、第1の実施形態における側部エリア220と同様に、特には端カット時において包装物50に側部歯を刺し込みやすく、包装物50が側部歯に対して横滑りしてしまうことによる斜め切れが生じにくい。
The side main region 320b includes a plurality of side teeth 322b having the same tooth height, and the plurality of side teeth are all outward teeth. Similar to the side area 220 in the first embodiment, the side main region 320b having a plurality of outward teeth is easy to insert the side teeth into the package 50, particularly at the time of edge cutting, and the package 50 is on the side. Diagonal cutting due to skidding with respect to the local teeth is unlikely to occur.
なお、側部メイン領域320bが有する複数の側部歯322bのうち、最も側部接続領域320a側に配置された側部歯(側部接続歯322c)は、歯の幅が、側部接続領域320aが有する側部歯322aおよび側部メイン領域320bが有する他の側部歯322bよりも小さい。このような側部接続歯322cは、主には上向歯からなる側部接続領域320aと外向歯からなる側部メイン領域320bとの間の切断を橋渡しする役割を有し、当該領域における包装物の横滑りを抑制できる。
Of the plurality of side teeth 322b possessed by the side main region 320b, the side teeth (side connecting teeth 322c) arranged on the side closest to the side connecting region 320a have a tooth width of the side connecting region. It is smaller than the side teeth 322a of the 320a and the other side teeth 322b of the side main region 320b. Such side connecting teeth 322c have a role of bridging the cutting between the side connecting region 320a mainly composed of the upward teeth and the side main region 320b composed of the outward teeth, and the packaging in the region. Can suppress skidding of objects.
本実施形態においても、図9に示すように、側部メイン領域320bに配置された側部歯(外向歯である側部歯322bまたは側部接続歯322c)の一つをT1とし、側部歯T1の外側に隣接されて配置された隣接歯をT2とし、側部歯T1の内側に隣接されて配置された隣接歯をT3とする。また、図9に示すように、側部歯T1の外側の斜辺の延長線と隣接歯T2の内側の斜辺の延長線とが交差する点を交差点S1とし、側部歯T1の内側の斜辺の延長線と隣接歯T3の外側の斜辺の延長線とが交差する点を交差点S2とする。
Also in the present embodiment, as shown in FIG. 9, one of the side teeth (extroverted side teeth 322b or side connecting teeth 322c) arranged in the side main region 320b is designated as T1 and the side portion. An adjacent tooth arranged adjacent to the outside of the tooth T1 is referred to as T2, and an adjacent tooth arranged adjacent to the inside of the side tooth T1 is referred to as T3. Further, as shown in FIG. 9, the point where the extension line of the outer hypotenuse of the side tooth T1 and the extension line of the inner hypotenuse of the adjacent tooth T2 intersect is defined as the intersection S1 and the inner hypotenuse of the side tooth T1. The point where the extension line and the extension line of the outer hypotenuse of the adjacent tooth T3 intersect is defined as the intersection S2.
また、本実施形態においてに、交差点S1と交差点S2とを結ぶ仮想直線(本実施形態においても、歯底線L1と同一の直線である)に対して側部歯T1の歯先から垂ろした垂線が、上記仮想直線(歯底線L1)と交差する点を交差点S3とする。また、S1とS3との間の距離をD1とし、S1とS2との間の距離をD2とする。このとき、側部エリア320において、D1とD2との比率は、以下の式1を満たす。
D1/D2 =0.20以上0.40以下 ・・・(式1) Further, in the present embodiment, a perpendicular line hung from the tip of the side tooth T1 with respect to a virtual straight line connecting the intersection S1 and the intersection S2 (also in the present embodiment, the same straight line as the tooth bottom line L1). However, the point where the virtual straight line (tooth bottom line L1) intersects is defined as the intersection S3. Further, the distance between S1 and S3 is D1, and the distance between S1 and S2 is D2. At this time, in theside area 320, the ratio of D1 and D2 satisfies the following equation 1.
D1 / D2 = 0.20 or more and 0.40 or less ... (Equation 1)
D1/D2 =0.20以上0.40以下 ・・・(式1) Further, in the present embodiment, a perpendicular line hung from the tip of the side tooth T1 with respect to a virtual straight line connecting the intersection S1 and the intersection S2 (also in the present embodiment, the same straight line as the tooth bottom line L1). However, the point where the virtual straight line (tooth bottom line L1) intersects is defined as the intersection S3. Further, the distance between S1 and S3 is D1, and the distance between S1 and S2 is D2. At this time, in the
D1 / D2 = 0.20 or more and 0.40 or less ... (Equation 1)
D1/D2が0.40以下であると、側部歯T1(外向歯)の歯先がより外側を向くため、端カット時において、より少ない応力で包装物50に側部歯T1を刺し込むことができ、包装物50の切断を容易に進行させることができる。そのため、端カット時に側部歯T1が包装物50に対して十分に刺し込まれず、包装物50が側部歯に対して横滑りしてしまうことによる斜め切れの発生を抑制することができる。D1/D2が0.20以上であると、側部歯T1(外向歯)の歯先が外側を向きすぎないため、中央カット時において、中央エリア210において開始された包装物50の切断の進行が側部歯T1によって阻害されにくく、上記切断が端部方向へとより進行しやすくなる。また、これにより、端カット時における斜め切れの発生を抑制することができる。端カットと中央カットのどちらからでもよく切れるより好ましい範囲は、D1/D2=0.25以上0.38以下であり、さらに好ましい範囲は、D1/D2=0.26以上0.37以下である。
When D1 / D2 is 0.40 or less, the tip of the side tooth T1 (outward tooth) faces more outward, so that the side tooth T1 is inserted into the package 50 with less stress at the time of edge cutting. This allows the cutting of the package 50 to proceed easily. Therefore, it is possible to suppress the occurrence of diagonal cutting due to the side teeth T1 not being sufficiently pierced into the package 50 at the time of edge cutting and the package 50 skidding with respect to the side teeth. When D1 / D2 is 0.20 or more, the tooth tips of the side teeth T1 (outward teeth) do not face too outward, so that the cutting progress of the package 50 started in the central area 210 at the time of the central cut. Is less likely to be blocked by the side teeth T1 and the cutting is more likely to proceed in the end direction. Further, this makes it possible to suppress the occurrence of diagonal cutting at the time of edge cutting. A more preferable range that can be cut well from either the edge cut or the center cut is D1 / D2 = 0.25 or more and 0.38 or less, and a more preferable range is D1 / D2 = 0.26 or more and 0.37 or less. ..
本実施形態においても、側部メイン領域320bを構成する複数の側部歯(外向歯)は、いずれも、当該側部歯(外向歯)の外側の斜辺と当該側部歯の外側で隣接する側部歯(外向歯)の内側の斜辺とが、1つまたは複数の円弧を介して屈折点を有さずに連接されている。これにより、包装物50の切断時に切断刃が包装物50に引っ掛かりにくくなり、縦裂けが生じにくくなるため、巻き戻り時の復旧はより容易になる。
Also in the present embodiment, the plurality of side teeth (extrovert teeth) constituting the side main region 320b are adjacent to the outer hypotenuse of the side teeth (extrovert teeth) on the outside of the side teeth. The inner hypotenuse of the lateral tooth (extrovert tooth) is connected via one or more arcs without having an inflection point. As a result, the cutting blade is less likely to be caught in the package 50 when the package 50 is cut, and vertical tearing is less likely to occur, so that recovery at the time of rewinding becomes easier.
また、本実施形態においても、側部歯T1の外側の斜辺と隣接歯T2の内側の斜辺とを連接する上記円弧は、いずれの側部歯についても、その曲率半径(R1)が0.3mm以上1.3mm以下である。上記曲率半径(R1)が0.3mm以上であると、破断の合流点に縦裂けを生じにくくして、巻き戻り時の復旧をより容易に行うことができる。上記曲率半径(R1)が1.3mm以下であると、上記円弧に包装物50が引っかかりにくくなり、中央カットおよび端カットのいずれにおいても、切断をより容易に行うことができる。上記観点から、曲率半径R1の好ましい範囲は0.35mm以上1.2mm以下であり、より好ましい範囲は0.35mm以上1.0mm以下である。
Further, also in the present embodiment, the arc connecting the outer hypotenuse of the side tooth T1 and the inner hypotenuse of the adjacent tooth T2 has a radius of curvature (R1) of 0.3 mm for any of the side teeth. It is 1.3 mm or more and 1.3 mm or less. When the radius of curvature (R1) is 0.3 mm or more, vertical tears are less likely to occur at the confluence of fractures, and recovery at the time of rewinding can be performed more easily. When the radius of curvature (R1) is 1.3 mm or less, the package 50 is less likely to be caught in the arc, and cutting can be performed more easily in both the center cut and the edge cut. From the above viewpoint, the preferable range of the radius of curvature R1 is 0.35 mm or more and 1.2 mm or less, and the more preferable range is 0.35 mm or more and 1.0 mm or less.
また、本実施形態においても、側部歯T1の外側の斜辺の曲率半径Rは、1.0mm以上10.0mm以下であることが好ましく、1.5mm以上8.0mm以下であることがより好ましい。また、隣接歯T2の内側の斜辺の曲率半径Rは、1.0mm以上7.0mm以下であることが好ましく、1.5mm以上6.0mm以下であることがより好ましい。各曲率半径を上記の値にすることで、連接辺の底部近辺が切断時に包装物50に引っ掛かることによる切断への抵抗を小さくして包装物50の切断をより容易にし、かつ、破断の合流点に縦裂けを生じにくくして、巻き戻り時の復旧をより容易に行うことができる。
Further, also in the present embodiment, the radius of curvature R of the outer oblique side of the side tooth T1 is preferably 1.0 mm or more and 10.0 mm or less, and more preferably 1.5 mm or more and 8.0 mm or less. .. The radius of curvature R of the inner oblique side of the adjacent tooth T2 is preferably 1.0 mm or more and 7.0 mm or less, and more preferably 1.5 mm or more and 6.0 mm or less. By setting each radius of curvature to the above value, the resistance to cutting due to the vicinity of the bottom of the connecting side being caught by the package 50 during cutting is reduced, the package 50 can be cut more easily, and the merging of breaks. Vertical tears are less likely to occur at the points, and recovery at the time of rewinding can be performed more easily.
なお、本実施形態において、側部歯T1の歯先と隣接歯T2の歯先とを結ぶ連接辺に接する、歯底線L1に平行な仮想直線は、歯谷線L2’と平行な、歯谷線L2’とは異なる直線(歯谷線L2aおよび歯谷線L2b)である。本実施形態においても、歯谷線L2aおよび歯谷線L2bは、歯谷線L2’と小歯線L5との間に位置する。また、側部接続領域320aを構成する複数の側部歯を側部歯T1および隣接歯T2としたときの歯谷線L2aと、側部メイン領域320bを構成する複数の側部歯を側部歯T1および隣接歯T2としたときの歯谷線L2bと、は、互いに平行な、異なる直線である。本実施形態において、歯谷線L2bは、歯谷線L2aと歯谷線L2’との間に位置する。一方で、側部接続領域320aを構成する複数の側部歯322aについて、当該側部歯322aの内側の斜辺の延長線と、当該側部歯322aの内側に隣接する側部歯の外側の斜辺の延長線と、が交差する交差点は、歯底線L1と平行な、歯底線L1とは異なる直線(歯底線L1’)上に位置する。本実施形態において、歯底線L1’は、歯谷線L2’と歯谷線L2との間に位置する。また、側部歯322a、側部歯322bおよび側部接続歯322cの歯先を結ぶ仮想直線は、中歯線L3と同一の直線である。なお、これらの側部歯の歯先を結ぶ仮想直線の位置は特に限定されず、小歯線L5と同一の直線、または小歯線L5より高く大歯線L4より低い位置の直線、となればよい。なお、図8および図9では、すべての側部歯の歯先が中歯線L3上に位置しているが、すべての側部歯の歯先が同一の仮想直線(図8および図9では中歯線L3)上に位置しなくてもよい。言い換えると、側部エリア320は、歯底線L1から側部歯の歯先までの距離が異なる複数の側部歯を有してもよい。
In the present embodiment, the virtual straight line parallel to the tooth bottom line L1 that is in contact with the connecting side connecting the tooth tip of the side tooth T1 and the tooth tip of the adjacent tooth T2 is a tooth valley parallel to the tooth valley line L2'. It is a straight line different from the line L2'(tooth valley line L2a and tooth valley line L2b). Also in this embodiment, the tooth valley line L2a and the tooth valley line L2b are located between the tooth valley line L2'and the small tooth line L5. Further, the tooth valley line L2a when the plurality of side teeth constituting the side connection region 320a are the side teeth T1 and the adjacent teeth T2, and the plurality of side teeth constituting the side main region 320b are side portions. The tooth valley line L2b when the tooth T1 and the adjacent tooth T2 are used are different straight lines parallel to each other. In the present embodiment, the tooth valley line L2b is located between the tooth valley line L2a and the tooth valley line L2'. On the other hand, with respect to the plurality of side teeth 322a constituting the side connection region 320a, the extension line of the inner oblique side of the side tooth 322a and the outer oblique side of the lateral tooth adjacent to the inside of the side tooth 322a. The intersection where the extension line of is and intersects is located on a straight line (tooth bottom line L1') parallel to the tooth bottom line L1 and different from the tooth bottom line L1. In the present embodiment, the tooth bottom line L1'is located between the tooth valley line L2'and the tooth valley line L2. Further, the virtual straight line connecting the tooth tips of the side tooth 322a, the side tooth 322b and the side connecting tooth 322c is the same straight line as the middle tooth line L3. The position of the virtual straight line connecting the tips of these side teeth is not particularly limited, and may be the same straight line as the small tooth line L5 or a straight line higher than the small tooth line L5 and lower than the large tooth line L4. Just do it. In addition, in FIGS. 8 and 9, the tooth tips of all the side teeth are located on the middle tooth line L3, but the tooth tips of all the side teeth are the same virtual straight line (in FIGS. 8 and 9). It does not have to be located on the middle tooth line L3). In other words, the side area 320 may have a plurality of side teeth having different distances from the bottom line L1 to the tooth tips of the side teeth.
(端部エリア)
図7に示すように、本実施形態において、端部エリア330は、側部エリア320(側部メイン領域320b)との接続領域である端部接続領域330aと、複数の外向歯を有する端部メイン領域330bと、を有する。 (End area)
As shown in FIG. 7, in the present embodiment, theend area 330 includes an end connection area 330a, which is a connection area with the side area 320 (side main area 320b), and an end having a plurality of outward teeth. It has a main region 330b and.
図7に示すように、本実施形態において、端部エリア330は、側部エリア320(側部メイン領域320b)との接続領域である端部接続領域330aと、複数の外向歯を有する端部メイン領域330bと、を有する。 (End area)
As shown in FIG. 7, in the present embodiment, the
図10は、端部接続領域330aおよび端部メイン領域330bを構成する歯を示す、図7における領域Uの部分拡大図である。
FIG. 10 is a partially enlarged view of the region U in FIG. 7, showing the teeth constituting the end connection region 330a and the end main region 330b.
端部接続領域330aは、歯高が異なる複数の端部歯を含んでなり、上記複数の端部歯はいずれも外向歯である。また、上記複数の端部歯は、連続する3つの端部歯の歯先が同一直線上に位置しないように配置される。具体的には、端部接続領域330aは、側部メイン領域が有する側部歯322bと歯高が同一である複数の接続中歯336、および接続中歯336と端部メイン領域330bが有する端大歯332との間の歯高である複数の接続大歯338を有する。そして、接続中歯336と接続大歯338は交互に配置されている。また、接続中歯336の歯先を結ぶ仮想直線は、中歯線L3と同一の直線であり、接続大歯338の歯先を結ぶ仮想直線L6は、中歯線L3より高く大歯線L4より低い位置の直線である。
The end connection region 330a includes a plurality of end teeth having different tooth heights, and the plurality of end teeth are all outward teeth. Further, the plurality of end teeth are arranged so that the tips of the three consecutive end teeth are not located on the same straight line. Specifically, the end connection region 330a includes a plurality of connecting middle teeth 336 having the same tooth height as the side teeth 322b of the side main region, and the ends of the connecting middle teeth 336 and the end main region 330b. It has a plurality of connecting large teeth 338 that are tooth heights between the large teeth 332. The connecting middle tooth 336 and the connecting large tooth 338 are arranged alternately. Further, the virtual straight line connecting the tooth tips of the connecting middle tooth 336 is the same straight line as the middle tooth line L3, and the virtual straight line L6 connecting the tooth tips of the connecting large tooth 338 is higher than the middle tooth line L3 and the large tooth line L4. It is a straight line at a lower position.
端部接続領域330aは、上記歯高が異なる複数の端部歯を有することにより、包装物50の切断を、歯高がより低い側部メイン領域320bから歯高がより高い端部メイン領域330bへと(あるいは端部メイン領域330bから側部メイン領域320bへと)円滑に移行させる。
The end connection region 330a has a plurality of end teeth having different tooth heights so that the package 50 can be cut from the side main region 320b having a lower tooth height to the end main region 330b having a higher tooth height. (Or from the end main area 330b to the side main area 320b).
端部メイン領域330bは、第1の実施形態と同様に、複数の端大歯332および複数の端中歯334からなる。ただし、本実施形態において、端大歯332および端中歯334はいずれも外向歯である。このような端部エリア330は、端カットに端部歯を刺し込みやすく、包装物50が端部歯に対して横滑りしてしまうことによる斜め切れが生じにくい。
The end main region 330b is composed of a plurality of large end teeth 332 and a plurality of middle end teeth 334 as in the first embodiment. However, in the present embodiment, both the large end tooth 332 and the middle end tooth 334 are extrovert teeth. In such an end area 330, the end teeth are easily inserted into the end cut, and the package 50 is less likely to be cut diagonally due to skidding with respect to the end teeth.
また、図10に示すように、端部メイン領域330bが有する一の外向歯である端部歯(図10では端中歯334)をT4とし、端部歯T4の外側に隣接されて配置された隣接歯をT5(図10では端大歯332b)とし、端部歯T4の内側に隣接されて配置された隣接歯をT6(図10では端大歯332a)とする。また、図10に示すように、端部歯T4の外側の斜辺の延長線と隣接歯T5の内側の斜辺の延長線とが交差する点を交差点S4とし、端部歯T4の内側の斜辺の延長線と隣接歯T6の外側の斜辺の延長線とが交差する点を交差点S5とする。
Further, as shown in FIG. 10, the end tooth (the end middle tooth 334 in FIG. 10), which is one outward tooth of the end main region 330b, is designated as T4, and is arranged adjacent to the outside of the end tooth T4. The adjacent tooth is T5 (large end tooth 332b in FIG. 10), and the adjacent tooth arranged adjacent to the inside of the end tooth T4 is T6 (large end tooth 332a in FIG. 10). Further, as shown in FIG. 10, the point where the extension line of the outer hypotenuse of the end tooth T4 and the extension line of the inner hypotenuse of the adjacent tooth T5 intersect is defined as the intersection S4, and the inner hypotenuse of the end tooth T4. The point where the extension line and the extension line of the outer hypotenuse of the adjacent tooth T6 intersect is defined as the intersection S5.
このとき、交差点S4と交差点S5とを結ぶ仮想直線(本実施形態では、歯底線L1と同一の直線である)に対して端部歯T4の歯先から垂ろした垂線が、上記仮想直線(歯底線L1)と交差する点を交差点S6とする。また、S4とS6との間の距離をD3とし、S4とS5との間の距離をD4とする。このとき、D3とD4との比率は、以下の式2を満たす。
D3/D4 =0.35以上0.50未満 ・・・(式2) At this time, the perpendicular line drawn from the tip of the end tooth T4 with respect to the virtual straight line connecting the intersection S4 and the intersection S5 (in the present embodiment, the same straight line as the tooth bottom line L1) is the above-mentioned virtual straight line ( The point that intersects the tooth bottom line L1) is defined as the intersection S6. Further, the distance between S4 and S6 is D3, and the distance between S4 and S5 is D4. At this time, the ratio of D3 and D4 satisfies the following equation 2.
D3 / D4 = 0.35 or more and less than 0.50 ... (Equation 2)
D3/D4 =0.35以上0.50未満 ・・・(式2) At this time, the perpendicular line drawn from the tip of the end tooth T4 with respect to the virtual straight line connecting the intersection S4 and the intersection S5 (in the present embodiment, the same straight line as the tooth bottom line L1) is the above-mentioned virtual straight line ( The point that intersects the tooth bottom line L1) is defined as the intersection S6. Further, the distance between S4 and S6 is D3, and the distance between S4 and S5 is D4. At this time, the ratio of D3 and D4 satisfies the following equation 2.
D3 / D4 = 0.35 or more and less than 0.50 ... (Equation 2)
D3/D4が0.50未満であると、端部エリア330が有する外向歯の歯先が外側を向くため、端カット時において、より少ない応力で包装物50に端部歯を刺し込むことができ、包装物50の切断を容易に進行させることができる。そのため、端部歯が包装物50に対して十分に刺し込まれず、包装物50が端部歯に対して横滑りしてしまうことによる斜め切れの発生を抑制することができる。D3/D4が0.35以上であると、端部エリア330が有する外向歯の歯先が外側を向きすぎないため、中央カット時において、中央エリア310において開始された包装物50の切断が端部エリア330の外向歯によって阻害されにくく、上記切断を包装物50の端部までより円滑に進行させやすくなる。端カットと中央カットのどちらからでもよく切れるより好ましい範囲は、D3/D4=0.37以上0.495以下であり、さらに好ましい範囲は、D3/D4=0.40以上0.49以下である。また、端部メイン領域330bが有する外向歯に関するD3/D4の値は、側部メイン領域320bが有する外向歯に関するD1/D2の値より大きいことが好ましい。
If D3 / D4 is less than 0.50, the tips of the outward teeth of the end area 330 face outward, so that the end teeth can be inserted into the package 50 with less stress at the time of end cutting. Therefore, the cutting of the package 50 can be easily proceeded. Therefore, it is possible to suppress the occurrence of diagonal cuts due to the end teeth not being sufficiently pierced into the package 50 and the package 50 skidding with respect to the end teeth. When D3 / D4 is 0.35 or more, the tips of the outward teeth of the end area 330 do not face too outward, so that the cutting of the package 50 started in the central area 310 at the time of the central cut ends. It is less likely to be hindered by the outward teeth of the portion area 330, making it easier for the cutting to proceed more smoothly to the end of the package 50. A more preferable range that can be cut well from either the edge cut or the center cut is D3 / D4 = 0.37 or more and 0.495 or less, and a more preferable range is D3 / D4 = 0.40 or more and 0.49 or less. .. Further, it is preferable that the value of D3 / D4 for the outward teeth of the end main region 330b is larger than the value of D1 / D2 for the outward teeth of the side main region 320b.
このように、端部メイン領域330bが有する外向歯のD3/D4を、側部メイン領域320bが有する外向歯のD1/D2より大きくすることで、端カット時において、包装物50に端部歯をより刺し込みやすくし、端カット時における斜め切れの発生をより効果的に抑制することができる。
In this way, by making the D3 / D4 of the outward teeth of the end main region 330b larger than the D1 / D2 of the outward teeth of the side main region 320b, the end teeth are attached to the package 50 at the time of end cutting. Can be more easily inserted, and the occurrence of diagonal cuts at the time of edge cutting can be suppressed more effectively.
なお、本実施形態においても、端部歯T4と隣接歯T5とを連接する連接辺が接する、歯底線L1と平行な仮想直線は、歯谷線L2’’と同一の直線である。
Also in this embodiment, the virtual straight line parallel to the tooth bottom line L1 in which the connecting side connecting the end tooth T4 and the adjacent tooth T5 is in contact is the same straight line as the tooth valley line L2 ″.
なお、端部接続領域330aが有する接続中歯336または接続大歯338を端部歯T4として同様に規定したときのD3/D4も、端部メイン領域330bが有する端大歯332または端中歯334を端部歯T4として規定したときのD3/D4と同じ範囲内にあることが好ましい。ただし、このとき、端部接続領域330aのうち側部メイン領域320b側に配置された接続中歯336aおよび接続大歯338aのD3/D4に対して、端部接続領域330aのうち端部メイン領域330b側に配置された接続中歯336bおよび接続大歯338bのD3/D4をより大きくする(端部メイン領域330bが有する外向歯のD3/D4により近づける)ことで、包装物50の切断を、側部メイン領域320bから端部エリア330へと(あるいは端部エリア330から側部メイン領域320bへと)円滑に移行させることができる。
In addition, D3 / D4 when the connecting middle tooth 336 or the connecting large tooth 338 included in the end connecting region 330a is similarly defined as the end tooth T4 is also the end large tooth 332 or the end middle tooth possessed by the end main region 330b. It is preferable that the 334 is within the same range as D3 / D4 when the end tooth T4 is defined. However, at this time, with respect to D3 / D4 of the connecting middle tooth 336a and the connecting large tooth 338a arranged on the side main area 320b side of the end connecting area 330a, the end main area of the end connecting area 330a By making the D3 / D4 of the connecting middle tooth 336b and the connecting large tooth 338b arranged on the 330b side larger (closer to the outward tooth D3 / D4 of the end main region 330b), the cutting of the package 50 can be performed. A smooth transition can be made from the side main area 320b to the end area 330 (or from the end area 330 to the side main area 320b).
また、このとき、側部メイン領域320bにおける外向歯のD1/D2、端部接続領域330aにおける外向歯のD3/D4、および端部メイン領域330bにおける外向歯のD3/D4は、この順に大きくなっていくことが好ましい。
At this time, D1 / D2 of the outward teeth in the side main region 320b, D3 / D4 of the outward teeth in the end connection region 330a, and D3 / D4 of the outward teeth in the end main region 330b increase in this order. It is preferable to continue.
端部エリア330(端部接続領域330aおよび端部メイン領域330b)を構成する端部歯は、いずれも、当該端部歯の外側の斜辺と当該端部歯の外側で隣接する端部歯の内側の斜辺とが、1つまたは複数の円弧を介して屈折点を有さずに連接されている。上述したように、それぞれの端部歯の斜辺が円弧を介して連接されていると、破断の合流点に縦裂けを生じにくくして、巻き戻り時の復旧をより容易に行うことができる。
The end teeth constituting the end area 330 (end connection area 330a and end main area 330b) are all of the end teeth adjacent to the outer hypotenuse of the end tooth and the outside of the end tooth. The inner hypotenuse is connected via one or more arcs without a refraction point. As described above, when the hypotenuses of the respective end teeth are connected via an arc, vertical tearing is less likely to occur at the confluence of fractures, and recovery at the time of rewinding can be performed more easily.
本実施形態においても、一の端部歯の外側の斜辺と当該端部歯の外側で隣接する端部歯の内側の斜辺とを連接する上記円弧は、いずれも、その曲率半径(R2)が0.3mm以上1.3mm以下である。上記曲率半径(R2)が0.3mm以上であると、破断の合流点に切り欠きを生じにくくすることができる。上記曲率半径(R2)が1.3mm以下であると、端部カットの初期や中央カットの最後の切断時に、上記円弧に包装物50が引っかかりにくくなり、切断をより容易に行うことができる。上記観点から、曲率半径R2の好ましい範囲は0.4mm以上1.2mm以下であり、より好ましい範囲は0.5mm以上1.2mm以下である。
Also in the present embodiment, the radius of curvature (R2) of each of the above arcs connecting the outer hypotenuse of one end tooth and the inner hypotenuse of the adjacent end tooth on the outside of the end tooth has a radius of curvature (R2). It is 0.3 mm or more and 1.3 mm or less. When the radius of curvature (R2) is 0.3 mm or more, it is possible to make it difficult for a notch to occur at the confluence of fractures. When the radius of curvature (R2) is 1.3 mm or less, the package 50 is less likely to be caught in the arc at the initial stage of end cutting or the final cutting of the central cut, and cutting can be performed more easily. From the above viewpoint, the preferable range of the radius of curvature R2 is 0.4 mm or more and 1.2 mm or less, and the more preferable range is 0.5 mm or more and 1.2 mm or less.
なお、いずれの端部歯を端部歯T4としたときも、端部歯T4の外側の斜辺の曲率半径Rは、1.0mm以上10.0mm以下であることが好ましく、1.5mm以上8.0mm以下であることがより好ましい。隣接歯T5の内側の斜辺の曲率半径Rは、1.0mm以上7.0mm以下であることが好ましく、1.5mm以上6.0mm以下であることがより好ましい。端部歯T4の外側の斜辺が円弧により連接されているとき、上記連接する円弧の曲率半径Rは、端部歯T4の外側の斜辺の曲率半径Rおよび隣接歯T5の内側の斜辺の曲率半径Rのいずれよりも小さい値であり、かつ、0.2mm以上2.0mm以下であることが好ましく、0.4mm以上1.2mm以下であることがより好ましい。各曲率半径を上記の値にすることで、連接辺の底部近辺が切断時に包装物50に引っ掛かることによる切断への抵抗を小さくして包装物50の切断をより容易にし、フィルム破断の合流点に生じる切り欠きの進行方向を包装物50の幅方向により近くして、巻き戻ってしまった包装物を復旧させる時(復旧時)の縦裂けを生じ難くさせることができる。
Regardless of which end tooth is the end tooth T4, the radius of curvature R of the outer hypotenuse of the end tooth T4 is preferably 1.0 mm or more and 10.0 mm or less, and 1.5 mm or more and 8 More preferably, it is 0.0 mm or less. The radius of curvature R of the inner oblique side of the adjacent tooth T5 is preferably 1.0 mm or more and 7.0 mm or less, and more preferably 1.5 mm or more and 6.0 mm or less. When the outer diagonal sides of the end teeth T4 are connected by an arc, the radius of curvature R of the connected arcs is the radius of curvature R of the outer diagonal side of the end teeth T4 and the radius of curvature of the inner diagonal side of the adjacent teeth T5. It is preferably a value smaller than any of R, and is preferably 0.2 mm or more and 2.0 mm or less, and more preferably 0.4 mm or more and 1.2 mm or less. By setting each radius of curvature to the above value, the resistance to cutting due to the vicinity of the bottom of the connecting side being caught by the package 50 during cutting is reduced, the package 50 can be cut more easily, and the confluence of film breaks. By making the traveling direction of the notch generated in the package 50 closer to the width direction of the package 50, it is possible to make it difficult for vertical tears to occur when the package that has been rewound is restored (during restoration).
[第3の実施形態]
図11は、本発明の第3の実施形態に関する包装容器20の構成を模式的に示す、蓋部を閉じたときの斜視図である。 [Third Embodiment]
FIG. 11 is a perspective view schematically showing the configuration of thepackaging container 20 according to the third embodiment of the present invention when the lid is closed.
図11は、本発明の第3の実施形態に関する包装容器20の構成を模式的に示す、蓋部を閉じたときの斜視図である。 [Third Embodiment]
FIG. 11 is a perspective view schematically showing the configuration of the
本実施形態に関する包装容器は、中央エリア410、側部エリア420および端部エリア430が直線状の切断刃400を有する点で第1の実施形態または第2の実施形態に関する包装容器とは異なる。なお、中央エリア410、側部エリア420および端部エリア430のそれぞれが有する歯の形状は、第1の実施形態または第2の実施形態と同様とし得る。
The packaging container according to the present embodiment is different from the packaging container according to the first embodiment or the second embodiment in that the central area 410, the side area 420, and the end area 430 have a linear cutting blade 400. The shape of the teeth of each of the central area 410, the side area 420, and the end area 430 may be the same as that of the first embodiment or the second embodiment.
本実施形態において、掩蓋片124の先端125および切断刃400は、直線状の形状を有する。具体的には、切断刃400は、切断刃400の中央から両端側に向けて配置される複数の歯を有する。そして、上記複数の歯は、切断刃400に設定される歯底線L1、歯谷線L2、小歯線L5、中歯線L3および大歯線L4が、いずれも直線となるように、配置される。
In the present embodiment, the tip 125 of the lid piece 124 and the cutting blade 400 have a linear shape. Specifically, the cutting blade 400 has a plurality of teeth arranged from the center of the cutting blade 400 toward both ends. The plurality of teeth are arranged so that the tooth bottom line L1, the tooth valley line L2, the small tooth line L5, the middle tooth line L3, and the large tooth line L4 set on the cutting blade 400 are all straight lines. Tooth.
本実施形態に関する包装容器20によれば、端カット時に、カットを開始する側の端部とは反対側の側部エリアに配置された外向歯が、切断の進行を阻害しにくいため、端カットをより容易に行うことができる。
According to the packaging container 20 according to the present embodiment, when the end is cut, the outward teeth arranged in the side area opposite to the end on the side where the cut is started do not easily hinder the progress of the cut, so that the end is cut. Can be done more easily.
[第4の実施形態]
図12は、本発明の第4の実施形態に関する包装容器30の構成を模式的に示す、蓋部を閉じたときの斜視図である。 [Fourth Embodiment]
FIG. 12 is a perspective view schematically showing the configuration of thepackaging container 30 according to the fourth embodiment of the present invention when the lid is closed.
図12は、本発明の第4の実施形態に関する包装容器30の構成を模式的に示す、蓋部を閉じたときの斜視図である。 [Fourth Embodiment]
FIG. 12 is a perspective view schematically showing the configuration of the
本実施形態に関する包装容器は、中央エリア510、側部エリア520および端部エリア530がいずれも屈曲している切断刃500を有する点で第1の実施形態または第2の実施形態に関する包装容器とは異なる。なお、中央エリア510、側部エリア520および端部エリア530のそれぞれが有する歯の形状は、第1の実施形態または第2の実施形態と同様とし得る。
The packaging container according to the present embodiment is the same as the packaging container according to the first embodiment or the second embodiment in that the central area 510, the side area 520, and the end area 530 all have a bending blade 500. Is different. The shape of the teeth of each of the central area 510, the side area 520, and the end area 530 may be the same as that of the first embodiment or the second embodiment.
本実施形態において、掩蓋片124の先端125および切断刃500は、略M字状の形状を有する。具体的には、切断刃500は、略M字の頂点でもある切断刃500の中央から両端側に向けて配置される複数の歯を有する。そして、上記複数の歯は、上述した歯底線L1、歯谷線L2、小歯線L5、中歯線L3および大歯線L4などが、切断刃500を包装容器30に設置したときに包装容器の底板118から蓋部120に向かう方向に凸になるような曲線となるように、配置される。
In the present embodiment, the tip 125 of the lid piece 124 and the cutting blade 500 have a substantially M-shaped shape. Specifically, the cutting blade 500 has a plurality of teeth arranged from the center of the cutting blade 500, which is also a substantially M-shaped apex, toward both ends. The plurality of teeth are packaged when the above-mentioned tooth bottom line L1, tooth valley line L2, small tooth line L5, middle tooth line L3, large tooth line L4 and the like are installed in the packaging container 30. The teeth are arranged so as to form a convex curve in the direction from the bottom plate 118 to the lid 120.
本実施形態に関する包装容器30によれば、端部エリア530の歯をより下方に突出させることができるため、端カットの初期において端部エリア530の歯を包装物50に刺し込みやすく、端カットをより容易に行うことができる。一方で、本実施形態に関する包装容器30によれば、第1の実施形態および第2の実施形態と同様に、中央エリア510が側部エリア520よりも突出して配置されているため、中央カットの初期において中央エリア510の歯を包装物50に刺し込みやすく、中央カットをより容易に行うことができる。
According to the packaging container 30 according to the present embodiment, since the teeth of the end area 530 can be projected further downward, the teeth of the end area 530 can be easily inserted into the package 50 at the initial stage of the end cut, and the end cut can be made. Can be done more easily. On the other hand, according to the packaging container 30 according to the present embodiment, as in the first embodiment and the second embodiment, the central area 510 is arranged so as to protrude from the side area 520, so that the central area is cut. In the initial stage, the teeth of the central area 510 can be easily inserted into the package 50, and the central cut can be performed more easily.
なお、切断刃500の形状は上記略M字状に限定されることはなく、たとえば、側部エリア520のみにおいて上記各線が曲線となるように配置されていてもよい。
The shape of the cutting blade 500 is not limited to the substantially M shape, and for example, each of the above lines may be arranged so as to be curved only in the side area 520.
[効果確認試験]
中央エリアと、外部エリア(側部エリアおよび端部エリア)と、を有する5つの樹脂製切断刃を用意した。それぞれの切断刃は、外向歯の有無、外向歯についてのD1/D2またはD3/D4、歯谷の形状(屈折点を有しているか、屈折点を有さずに円弧によって連接されているか)、ならびに歯谷が円弧によって連接されているときの円弧の曲率半径、が異なっていた。 [Effect confirmation test]
Five resin cutting blades having a central area and an outer area (side area and end area) were prepared. Each cutting blade has an outward tooth, D1 / D2 or D3 / D4 for the outward tooth, and the shape of the tooth valley (whether it has a refraction point or is connected by an arc without a refraction point). , And the radius of curvature of the arc when the tooth valleys are connected by the arc, were different.
中央エリアと、外部エリア(側部エリアおよび端部エリア)と、を有する5つの樹脂製切断刃を用意した。それぞれの切断刃は、外向歯の有無、外向歯についてのD1/D2またはD3/D4、歯谷の形状(屈折点を有しているか、屈折点を有さずに円弧によって連接されているか)、ならびに歯谷が円弧によって連接されているときの円弧の曲率半径、が異なっていた。 [Effect confirmation test]
Five resin cutting blades having a central area and an outer area (side area and end area) were prepared. Each cutting blade has an outward tooth, D1 / D2 or D3 / D4 for the outward tooth, and the shape of the tooth valley (whether it has a refraction point or is connected by an arc without a refraction point). , And the radius of curvature of the arc when the tooth valleys are connected by the arc, were different.
効果確認試験に用いた5つの切断刃について、中央エリアの形状を表1に、側部エリアの形状を表2に、端部エリアの形状を表3に、それぞれ示す。なお、D1/D2、D3/D4、曲率半径Rc、曲率半径R1および曲率半径R2について、各エリアにこれらが異なる複数の形状の歯が含まれるときは、D1/D2およびD3/D4については各エリアにおけるすべての値を、曲率半径Rc、曲率半径R1および曲率半径R2についてはその下限および上限を、それぞれ示す。
For the five cutting blades used in the effect confirmation test, the shape of the central area is shown in Table 1, the shape of the side area is shown in Table 2, and the shape of the end area is shown in Table 3. Regarding D1 / D2, D3 / D4, radius of curvature Rc, radius of curvature R1 and radius of curvature R2, when each area contains teeth having a plurality of different shapes, D1 / D2 and D3 / D4 are each. All values in the area are shown with their lower and upper limits for radius of curvature Rc, radius of curvature R1 and radius of curvature R2, respectively.
切断刃-1~切断刃-5を各々図1および図2に示す形状の包装容器に接合したものを用いて、以下の試験-1~試験-3を行った。
The following tests -1 to -3 were performed using cutting blades -1 to -5 joined to packaging containers having the shapes shown in FIGS. 1 and 2, respectively.
(試験-1: 端カットのしやすさ)
無作為に選択した男女を含む25人の試験者に、巻回されて包装容器に収容されたポリ塩化ビニリデン製のフィルムを端カットにより切断させた。それぞれの試験者による、40回の切断のうち、斜め切れが生じた回数を計測し、以下の基準により端カットのしやすさを評価した。
◎ 斜め切れが1回も生じかなった試験者は、総試験者のうち70%以上だった
○ 斜め切れが1回も生じかなった試験者は、総試験者のうち50%以上69%以下だった
△ 斜め切れが1回も生じかなった試験者は、総試験者のうち30%以上49%以下だった
× 斜め切れが1回も生じかなった試験者は、総試験者のうち29%以下だった (Test-1: Ease of edge cutting)
Twenty-five testers, including randomly selected men and women, cut a film of polyvinylidene chloride that was wound and contained in a packaging container by edge cutting. Of the 40 cuts made by each tester, the number of diagonal cuts was measured, and the ease of edge cutting was evaluated according to the following criteria.
◎ 70% or more of the total examiners did not have a diagonal cut. ○ 50% or more and 69% or less of the total examiners did not have a diagonal cut. △ The number of examiners who did not have a single diagonal cut was 30% or more and 49% or less of the total examiners. × The number of examiners who did not have a single diagonal cut was 29% or less of the total examiners. was
無作為に選択した男女を含む25人の試験者に、巻回されて包装容器に収容されたポリ塩化ビニリデン製のフィルムを端カットにより切断させた。それぞれの試験者による、40回の切断のうち、斜め切れが生じた回数を計測し、以下の基準により端カットのしやすさを評価した。
◎ 斜め切れが1回も生じかなった試験者は、総試験者のうち70%以上だった
○ 斜め切れが1回も生じかなった試験者は、総試験者のうち50%以上69%以下だった
△ 斜め切れが1回も生じかなった試験者は、総試験者のうち30%以上49%以下だった
× 斜め切れが1回も生じかなった試験者は、総試験者のうち29%以下だった (Test-1: Ease of edge cutting)
Twenty-five testers, including randomly selected men and women, cut a film of polyvinylidene chloride that was wound and contained in a packaging container by edge cutting. Of the 40 cuts made by each tester, the number of diagonal cuts was measured, and the ease of edge cutting was evaluated according to the following criteria.
◎ 70% or more of the total examiners did not have a diagonal cut. ○ 50% or more and 69% or less of the total examiners did not have a diagonal cut. △ The number of examiners who did not have a single diagonal cut was 30% or more and 49% or less of the total examiners. × The number of examiners who did not have a single diagonal cut was 29% or less of the total examiners. was
(試験-2: 復旧率)
巻回されて包装容器に収容されたポリ塩化ビニリデン製のフィルムを収容容器から30cm繰り出して、蓋部をしっかりと閉めた状態で、刃型がラップフィルムに残るようにラップフィルムを切断した。その後、残されたラップフィルムを、皺ができるだけ入らないようにして収容体の内部に巻き戻し、ラップフィルムの端部を巻回されているラップフィルムに密着させた。 (Test-2: Recovery rate)
The film made of polyvinylidene chloride, which was wound and contained in the packaging container, was unwound 30 cm from the container, and the wrap film was cut so that the blade mold remained on the wrap film with the lid tightly closed. Then, the remaining wrap film was rewound inside the container with as few wrinkles as possible, and the end portion of the wrap film was brought into close contact with the wound wrap film.
巻回されて包装容器に収容されたポリ塩化ビニリデン製のフィルムを収容容器から30cm繰り出して、蓋部をしっかりと閉めた状態で、刃型がラップフィルムに残るようにラップフィルムを切断した。その後、残されたラップフィルムを、皺ができるだけ入らないようにして収容体の内部に巻き戻し、ラップフィルムの端部を巻回されているラップフィルムに密着させた。 (Test-2: Recovery rate)
The film made of polyvinylidene chloride, which was wound and contained in the packaging container, was unwound 30 cm from the container, and the wrap film was cut so that the blade mold remained on the wrap film with the lid tightly closed. Then, the remaining wrap film was rewound inside the container with as few wrinkles as possible, and the end portion of the wrap film was brought into close contact with the wound wrap film.
この状態から、無作為に選択した50人の試験者に、テープなどの道具は使用しないで、縦裂けが生じないように、ラップフィルムの全幅を収容箱の外部に引き出させた。50人の試験者による復旧のうち、2分以内に全幅を収容箱外部に引き出せた人数を計測し、その確率を復旧率とした。
From this state, 50 randomly selected testers were asked to pull out the entire width of the wrap film to the outside of the containment box so that vertical tears would not occur without using tools such as tape. Of the recovery by 50 testers, the number of people who could pull out the entire width to the outside of the storage box within 2 minutes was measured, and the probability was taken as the recovery rate.
(試験-3: 中央カットに必要な切断力)
巻回されたポリ塩化ビニリデン製のフィルムを収容させた包装容器を、プッシュプルゲージが備えられた測定器に設置し、フィルムを30cm繰り出して、測定器の固定治具に固定した。この状態で、包装容器の蓋部(掩蓋片)がフィルムから離れないように包装容器を固定しながら、切断刃の全体がフィルムに一様に押しつけられるように、毎秒90°の回転速度で、巻回されたフィルムの巻回軸を中心に包装容器を回転させた。このとき、フィルムを切断するために必要だった回転力の最大値を5~10回測定し、これらの平均を、中央カットに必要な切断力とした。 (Test-3: Cutting force required for central cutting)
A packaging container containing a wound polyvinylidene chloride film was placed in a measuring instrument equipped with a push-pull gauge, and the film was unwound by 30 cm and fixed to a fixing jig of the measuring instrument. In this state, while fixing the packaging container so that the lid (cover piece) of the packaging container does not separate from the film, the rotation speed of 90 ° per second is such that the entire cutting blade is uniformly pressed against the film. The packaging container was rotated around the winding shaft of the wound film. At this time, the maximum value of the rotational force required to cut the film was measured 5 to 10 times, and the average of these was taken as the cutting force required for the central cut.
巻回されたポリ塩化ビニリデン製のフィルムを収容させた包装容器を、プッシュプルゲージが備えられた測定器に設置し、フィルムを30cm繰り出して、測定器の固定治具に固定した。この状態で、包装容器の蓋部(掩蓋片)がフィルムから離れないように包装容器を固定しながら、切断刃の全体がフィルムに一様に押しつけられるように、毎秒90°の回転速度で、巻回されたフィルムの巻回軸を中心に包装容器を回転させた。このとき、フィルムを切断するために必要だった回転力の最大値を5~10回測定し、これらの平均を、中央カットに必要な切断力とした。 (Test-3: Cutting force required for central cutting)
A packaging container containing a wound polyvinylidene chloride film was placed in a measuring instrument equipped with a push-pull gauge, and the film was unwound by 30 cm and fixed to a fixing jig of the measuring instrument. In this state, while fixing the packaging container so that the lid (cover piece) of the packaging container does not separate from the film, the rotation speed of 90 ° per second is such that the entire cutting blade is uniformly pressed against the film. The packaging container was rotated around the winding shaft of the wound film. At this time, the maximum value of the rotational force required to cut the film was measured 5 to 10 times, and the average of these was taken as the cutting force required for the central cut.
それぞれの切断刃についての、試験-1~試験-3の結果を、表4に示す。
Table 4 shows the results of Test-1 to Test-3 for each cutting blade.
表4の結果から明らかなように、外部エリア(側部エリアまたは端部エリア)にのみ外向歯を有し、当該外向歯と当該外向歯に隣接して配置された隣接歯との間が円弧によって連接されていると、巻き戻り時の復旧率がより高くなった。
As is clear from the results in Table 4, the extrovert teeth are provided only in the external area (side area or end area), and an arc is formed between the extrovert teeth and the adjacent teeth arranged adjacent to the extrovert teeth. When connected by, the recovery rate when rewinding was higher.
また、D1/D2が0.20以上0.40以下であると、端カットおよび中央カットの両方で切断が容易になっており、D3/D4が0.35以上0.50未満であっても、端カットおよび中央カットの両方で切断が容易になっていた。
Further, when D1 / D2 is 0.20 or more and 0.40 or less, cutting is easy in both the edge cut and the center cut, and even if D3 / D4 is 0.35 or more and less than 0.50. , Both edge cuts and center cuts facilitated cutting.
[その他の実施形態]
なお、上述した実施形態は、本発明を実施するにあたっての具体化の一例を示したものに過ぎず、これによって本発明の技術的範囲が限定的に解釈されてはならない。すなわち、本発明はその要旨、またはその主要な特徴から逸脱することなく、様々な形で実施することができる。 [Other Embodiments]
It should be noted that the above-described embodiment is merely an example of implementation in carrying out the present invention, and the technical scope of the present invention should not be construed in a limited manner by this. That is, the present invention can be implemented in various forms without departing from its gist or its main features.
なお、上述した実施形態は、本発明を実施するにあたっての具体化の一例を示したものに過ぎず、これによって本発明の技術的範囲が限定的に解釈されてはならない。すなわち、本発明はその要旨、またはその主要な特徴から逸脱することなく、様々な形で実施することができる。 [Other Embodiments]
It should be noted that the above-described embodiment is merely an example of implementation in carrying out the present invention, and the technical scope of the present invention should not be construed in a limited manner by this. That is, the present invention can be implemented in various forms without departing from its gist or its main features.
たとえば、中央エリア、側部エリア(側部接続領域および側部メイン領域)、および端部エリア(端部接続領域および端部メイン領域)は、それぞれ、上記曲率半径、D1/D2またはD3/D4が異なる複数の歯を有していてもよい。
For example, the central area, side area (side connection area and side main area), and end area (end connection area and end main area) are the radius of curvature, D1 / D2 or D3 / D4, respectively. May have a plurality of different teeth.
たとえば、上記各実施形態では、中央エリアに配置されたすべての中央歯について曲率半径Rcが上記範囲に含まれるとしたが、いずれか1つの中央歯について曲率半径Rcが上記範囲に含まれればよい。ただし、少なくとも半分以上の中央歯について曲率半径Rcが上記範囲に含まれることが好ましく、すべての中央歯について曲率半径Rcが上記範囲に含まれることがより好ましい。
For example, in each of the above embodiments, the radius of curvature Rc is included in the above range for all the central teeth arranged in the central area, but the radius of curvature Rc may be included in the above range for any one of the central teeth. .. However, it is preferable that the radius of curvature Rc is included in the above range for at least half or more of the central teeth, and it is more preferable that the radius of curvature Rc is included in the above range for all the central teeth.
また、上記各実施形態では、側部エリアに配置されたすべての外向歯について曲率半径R1が上記範囲に含まれるとしたが、いずれか1つの外向歯について曲率半径R1が上記範囲に含まれればよい。ただし、少なくとも半分以上の外向歯について曲率半径R1が上記範囲に含まれることが好ましく、すべての外向歯について曲率半径R1が上記範囲に含まれることがより好ましい。
Further, in each of the above embodiments, the radius of curvature R1 is included in the above range for all the outward teeth arranged in the side area, but if the radius of curvature R1 is included in the above range for any one of the outward teeth. Good. However, it is preferable that the radius of curvature R1 is included in the above range for at least half or more of the outward teeth, and it is more preferable that the radius of curvature R1 is included in the above range for all the outward teeth.
また、上記各実施形態では、端部エリアに配置されたすべての端部歯について曲率半径R2が上記範囲に含まれるとしたが、いずれか1つの端部歯について曲率半径R2が上記範囲に含まれればよい。ただし、少なくとも半分以上の端部歯について曲率半径R2が上記範囲に含まれることが好ましく、すべての端部歯について曲率半径R2が上記範囲に含まれることがより好ましい。
Further, in each of the above embodiments, the radius of curvature R2 is included in the above range for all the end teeth arranged in the end area, but the radius of curvature R2 is included in the above range for any one of the end teeth. It should be done. However, it is preferable that the radius of curvature R2 is included in the above range for at least half or more of the end teeth, and it is more preferable that the radius of curvature R2 is included in the above range for all the end teeth.
また、上記各実施形態では、中央歯、側部歯および端部歯それぞれのすべてについて斜辺の曲率半径Rが上記範囲に含まれるとしたが、いずれか1つの中央歯、側部歯または端部歯について曲率半径Rが上記範囲に含まれればよい。ただし、中央歯、側部歯および端部歯それぞれについて、少なくとも半分以上の歯の曲率半径Rが上記範囲に含まれることが好ましく、すべての歯について曲率半径Rが上記範囲に含まれることがより好ましい。
Further, in each of the above embodiments, the radius of curvature R of the hypotenuse is included in the above range for all of the central tooth, the side tooth and the end tooth, but any one of the central tooth, the side tooth or the end portion. The radius of curvature R of the tooth may be included in the above range. However, it is preferable that the radius of curvature R of at least half or more of the central tooth, the side tooth and the end tooth is included in the above range, and the radius of curvature R of all the teeth is included in the above range. preferable.
また、上記各実施形態では、側部エリアに配置されたすべての外向歯についてD1/D2が上記範囲に含まれるとしたが、いずれか1つの外向歯についてD1/D2が上記範囲に含まれればよい。ただし、少なくとも半分以上の外向歯についてD1/D2が上記範囲に含まれることが好ましく、すべての外向歯についてD1/D2が上記範囲に含まれることがより好ましい。
Further, in each of the above embodiments, D1 / D2 is included in the above range for all the outward teeth arranged in the side area, but if D1 / D2 is included in the above range for any one of the outward teeth. Good. However, it is preferable that D1 / D2 is included in the above range for at least half or more of the outward teeth, and it is more preferable that D1 / D2 is included in the above range for all the outward teeth.
また、上記第2の実施形態では、端部エリアに配置されたすべての外向歯についてD3/D4が上記範囲に含まれるとしたが、いずれか1つの外向歯についてD3/D4が上記範囲に含まれればよい。ただし、少なくとも半分以上の外向歯についてD3/D4が上記範囲に含まれることが好ましく、すべての外向歯についてD3/D4が上記範囲に含まれることがより好ましい。
Further, in the second embodiment, D3 / D4 is included in the above range for all the outward teeth arranged in the end area, but D3 / D4 is included in the above range for any one of the outward teeth. It should be. However, it is preferable that D3 / D4 is included in the above range for at least half or more of the extrovert teeth, and it is more preferable that D3 / D4 is included in the above range for all extrovert teeth.
また、上記各実施形態では、中央エリアに中央小歯が配置されているが、中央小歯が配置されない構成であってもよい。
Further, in each of the above embodiments, the central small tooth is arranged in the central area, but the central small tooth may not be arranged.
なお、上述したいずれの実施形態においても、切断刃は、ポリエステル、ポリエチレン、ポリプロピレン、ポリスチレン、ポリアセタール、ポリフェニレンサルファイド、ポリエーテルエーテルケトン(PEEK)、ポリエーテルサルフォン(PES)、およびポリ乳酸(PLA)などの樹脂製でもよいし、金属製でもよい。ただし、効果確認試験-2で示したように、切断刃が樹脂製であるとき、包装物の縦裂けはより生じやすい。そのため、包装物の縦裂けを抑制するという効果は、切断刃が樹脂製であるときに顕著である。
In any of the above-described embodiments, the cutting blades are polyester, polyethylene, polypropylene, polystyrene, polyacetal, polyphenylene sulfide, polyetheretherketone (PEEK), polyethersulfone (PES), and polylactic acid (PLA). It may be made of resin such as, or it may be made of metal. However, as shown in the effect confirmation test-2, when the cutting blade is made of resin, vertical tearing of the package is more likely to occur. Therefore, the effect of suppressing vertical tearing of the package is remarkable when the cutting blade is made of resin.
また、前板のうち、蓋部が開口部を閉じたときに掩蓋片と対向する領域には、包装物の切断部付近を付着させて巻き戻りを抑制するためのストッパを有してもよい。ストッパは、たとえば、前板に、前板の一部を切り起こしたフラップを形成し、フラップの表面に形成する構成とすることができる。
Further, in the region of the front plate that faces the lid piece when the lid closes the opening, a stopper may be provided for adhering the vicinity of the cut portion of the package to suppress rewinding. .. The stopper may be configured such that, for example, a flap formed by cutting a part of the front plate is formed on the front plate and is formed on the surface of the flap.
また、本体部、蓋部および抑え板の表面は、耐水性および耐光性などを高めるため、紫外線硬化型ニスを塗布および硬化させるなどして表面処理されていてもよい。
Further, the surfaces of the main body, the lid, and the holding plate may be surface-treated by applying and curing an ultraviolet curable varnish in order to improve water resistance and light resistance.
また、包装物は、シート状またはフィルム状の長尺物が巻回されていればよく、その材料は、樹脂(ポリ塩化ビニリデン、塩化ビニル、ポリエチレン、ポリメチルペンテンなどからなる単層または多層のフィルムまたはシートなど)、紙(ロール紙、キッチンペーパー、調理用加熱シートおよびクッキングシートなど)および金属箔(アルミホイルなど)などであってもよい。
Further, the package may be a long sheet or film wound, and the material thereof is a single layer or a multi-layer made of a resin (polyvinyl chloride, vinyl chloride, polyethylene, polymethylpentene, etc.). It may be film or sheet, etc.), paper (roll paper, kitchen paper, cooking heating sheet, cooking sheet, etc.) and metal foil (aluminum foil, etc.).
本出願は、2019年3月19日出願の日本国出願番号2019-051447号に基づく優先権を主張する出願であり、当該出願の特許請求の範囲、明細書および図面に記載された内容は本出願に援用される。
This application is an application claiming priority based on Japanese Application No. 2019-051447 filed on March 19, 2019, and the contents described in the claims, specification and drawings of the application are the present. Incorporated in the application.
本発明の切断刃は、巻回された包装物の逆回転などにより切断された包装物が本体部の内部へ巻き戻って、包装物の端部が巻回された包装物の表面に貼り付いてしまい、上記貼り付いてしまった端部を再び本体部と蓋部との間に復旧させるときに、包装物への縦裂けの発生を抑制することができる。そのため、本発明は、包装容器のより快適な使用を可能とし、包装用フィルムなどの家庭および業務用の使用を促進して、当分野の発展に寄与すると期待される。
In the cutting blade of the present invention, the package cut by the reverse rotation of the wound package is rewound inside the main body, and the end portion of the package is attached to the surface of the wound package. When the end portion that has been stuck is restored between the main body portion and the lid portion again, the occurrence of vertical tearing in the package can be suppressed. Therefore, the present invention is expected to enable more comfortable use of packaging containers, promote the use of packaging films and the like for home and business use, and contribute to the development of this field.
10、20、30 包装容器
50 包装物
100 収容箱
110 本体部
112a、112b 端板
114 前板
116 後板
118 底板
119 開口面
120 蓋部
122 蓋板
124 掩蓋片
125、125a、125b 掩蓋片の先端
126a、126b 側蓋片
128 連接部
200、300、400、500 切断刃
210、310、410、510 中央エリア
212、212a、212b、212c、312 中央大歯
214、214a、214b、214c、214d、314 中央中歯
216、316 中央小歯
220、320、420、520 側部エリア
222、322、322a、322b 側部歯
230、330、430、530 端部エリア
232、232a、232b、332、332a、332b 端大歯
234、234a、234b、334 端中歯
320a 側部接続領域
320b 側部メイン領域
330a 端部接続領域
330b 端部メイン領域
322c 側部接続歯
336、336a、336b 接続中歯
338、338a、338b 接続大歯 10, 20, 30Packaging container 50 Packaging 100 Storage box 110 Main body 112a, 112b End plate 114 Front plate 116 Rear plate 118 Bottom plate 119 Opening surface 120 Lid 122 Lid plate 124 Tooth lid piece 125, 125a, 125b Tooth lid piece 126a, 126b Side lid piece 128 connecting part 200, 300, 400, 500 Cutting blade 210, 310, 410, 510 Central area 212, 212a, 212b, 212c, 312 Central large teeth 214, 214a, 214b, 214c, 214d, 314 Central middle tooth 216, 316 Central small tooth 220, 320, 420, 520 Side area 222, 322, 322a, 322b Side tooth 230, 330, 430, 530 End area 232, 232a, 232b, 332, 332a, 332b Large end tooth 234, 234a, 234b, 334 End middle tooth 320a Side connection area 320b Side main area 330a End connection area 330b End main area 322c Side connection tooth 336, 336a, 336b Connection middle tooth 338, 338a, 338b connecting large teeth
50 包装物
100 収容箱
110 本体部
112a、112b 端板
114 前板
116 後板
118 底板
119 開口面
120 蓋部
122 蓋板
124 掩蓋片
125、125a、125b 掩蓋片の先端
126a、126b 側蓋片
128 連接部
200、300、400、500 切断刃
210、310、410、510 中央エリア
212、212a、212b、212c、312 中央大歯
214、214a、214b、214c、214d、314 中央中歯
216、316 中央小歯
220、320、420、520 側部エリア
222、322、322a、322b 側部歯
230、330、430、530 端部エリア
232、232a、232b、332、332a、332b 端大歯
234、234a、234b、334 端中歯
320a 側部接続領域
320b 側部メイン領域
330a 端部接続領域
330b 端部メイン領域
322c 側部接続歯
336、336a、336b 接続中歯
338、338a、338b 接続大歯 10, 20, 30
Claims (10)
- ロール状の包装物を収容する包装容器の長手方向に沿って設けられ、前記包装物を切断する切断刃であって、
複数の歯が配列された中央エリアと、前記中央エリアの外側で複数の歯が配列された一対の外部エリアと、を有し
前記外部エリアのみに、歯先が外側を向いた外向歯を有し、
前記外向歯の外側の斜辺と前記外向歯の外側に隣接して配置された隣接歯の内側の斜辺とは、円弧によって連接されており、
前記円弧の曲率半径は、0.3mm以上1.3mm以下である、
切断刃。 A cutting blade provided along the longitudinal direction of a packaging container for accommodating a roll-shaped package and for cutting the package.
It has a central area in which a plurality of teeth are arranged and a pair of external areas in which a plurality of teeth are arranged outside the central area, and only the external area has an outward tooth with a tooth tip facing outward. And
The outer hypotenuse of the outward tooth and the inner hypotenuse of the adjacent tooth arranged adjacent to the outer side of the outward tooth are connected by an arc.
The radius of curvature of the arc is 0.3 mm or more and 1.3 mm or less.
Cutting blade. - 前記外部エリアは、前記中央エリアに隣接して配置された側部エリアと、前記側部エリアの外側に配置された一対の端部エリアと、を有し
前記外向歯は、前記側部エリアに配置されている、
請求項1に記載の切断刃。 The external area has a side area arranged adjacent to the central area and a pair of end areas arranged outside the side area, and the extrovert teeth are located in the side area. Being placed,
The cutting blade according to claim 1. - 前記外向歯をT1とし、
前記外向歯T1の外側に隣接して配置された隣接歯をT2とし、
前記外向歯T1の内側に隣接して配置された隣接歯をT3とし、
前記外向歯T1の外側の斜辺の延長線と、前記隣接歯T2の内側の斜辺の延長線と、が交差する点を交差点S1とし、
前記外向歯T1の内側の斜辺の延長線と、前記隣接歯T3の外側の斜辺の延長線と、が交差する点を交差点S2とし、
交差点S1と交差点S2とを結ぶ仮想直線である歯底線に対して前記外向歯の歯先から垂ろした垂線が、前記歯底線と交差する点を交差点S3とするとき、
交差点S1と交差点S3との間の距離D1と、交差点S1と交差点S2との間の距離D2と、の比率は以下の式1を満たす、
D1/D2 =0.20以上0.40以下 ・・・(式1)
請求項2に記載の切断刃。 Let the extrovert tooth be T1
An adjacent tooth arranged adjacent to the outside of the outward tooth T1 is defined as T2.
Adjacent teeth arranged adjacent to the inside of the extrovert tooth T1 are designated as T3.
An intersection S1 is a point where the extension line of the outer hypotenuse of the outward tooth T1 and the extension line of the inner hypotenuse of the adjacent tooth T2 intersect.
An intersection S2 is a point where the extension line of the inner hypotenuse of the outward tooth T1 and the extension line of the outer hypotenuse of the adjacent tooth T3 intersect.
When the point where the perpendicular line hanging from the tip of the outward tooth intersects the tooth bottom line with respect to the tooth bottom line which is a virtual straight line connecting the intersection S1 and the intersection S2 is defined as the intersection S3.
The ratio of the distance D1 between the intersection S1 and the intersection S3 and the distance D2 between the intersection S1 and the intersection S2 satisfies the following equation 1.
D1 / D2 = 0.20 or more and 0.40 or less ... (Equation 1)
The cutting blade according to claim 2. - 前記外部エリアは、前記中央エリアに隣接して配置された側部エリアと、前記側部エリアの外側に配置された一対の端部エリアと、を有し
前記外向歯は、前記端部エリアに配置されている、
請求項1~3のいずれか1項に記載の切断刃。 The external area has a side area arranged adjacent to the central area and a pair of end areas arranged outside the side area, and the extrovert teeth are located in the end area. Being placed,
The cutting blade according to any one of claims 1 to 3. - 前記外向歯をT4とし、
前記外向歯T4の外側に隣接して配置された隣接歯をT5とし、
前記外向歯T4の内側に隣接して配置された隣接歯をT6とし、
前記外向歯T4の外側の斜辺の延長線と、前記隣接歯T5の内側の斜辺の延長線と、が交差する点を交差点S4とし、
前記外向歯T4の内側の斜辺の延長線と、前記隣接歯T6の外側の斜辺の延長線と、が交差する点を交差点S5とし、
交差点S4と交差点S5とを結ぶ仮想直線である歯底線に対して前記外向歯の歯先から垂ろした垂線が、前記歯底線と交差する点を交差点S6とするとき、
交差点S4と交差点S6との間の距離D3と、交差点S4と交差点S5との間の距離D4と、の比率は以下の式2を満たす、
D3/D4 =0.35以上0.50未満 ・・・(式2)
請求項4に記載の切断刃。 Let the extrovert tooth be T4
An adjacent tooth arranged adjacent to the outside of the outward tooth T4 is designated as T5.
The adjacent tooth arranged adjacent to the inside of the outward tooth T4 is designated as T6.
An intersection S4 is a point where the extension line of the outer hypotenuse of the outward tooth T4 and the extension line of the inner hypotenuse of the adjacent tooth T5 intersect.
An intersection S5 is a point where the extension line of the inner hypotenuse of the outward tooth T4 and the extension line of the outer hypotenuse of the adjacent tooth T6 intersect.
When the point where the perpendicular line hanging from the tip of the outward tooth intersects the tooth bottom line with respect to the tooth bottom line which is a virtual straight line connecting the intersection S4 and the intersection S5 is defined as the intersection S6.
The ratio of the distance D3 between the intersection S4 and the intersection S6 and the distance D4 between the intersection S4 and the intersection S5 satisfies the following equation 2.
D3 / D4 = 0.35 or more and less than 0.50 ... (Equation 2)
The cutting blade according to claim 4. - 前記中央エリアに配置された一の歯は、前記一の歯の外側の斜辺と前記一の歯に隣接する歯の斜辺とが、円弧によって連接されている、
請求項1~5のいずれか1項に記載の切断刃。 In the one tooth arranged in the central area, the hypotenuse of the outer side of the one tooth and the hypotenuse of the tooth adjacent to the one tooth are connected by an arc.
The cutting blade according to any one of claims 1 to 5. - 前記一の歯の外側の斜辺と前記一の歯に隣接する歯の斜辺とを連接する円弧の曲率半径(Rc)は、0.5mm以上1.3mm以下である、
請求項6に記載の切断刃。 The radius of curvature (Rc) of the arc connecting the outer hypotenuse of the one tooth and the hypotenuse of the tooth adjacent to the one tooth is 0.5 mm or more and 1.3 mm or less.
The cutting blade according to claim 6. - 前記外部エリアは、
歯先が外側を向いていない上向歯を有し、
前記上向歯は、前記上向歯の外側の斜辺と前記上向歯に隣接する歯の斜辺とが、円弧によって連接されている、
請求項1~7のいずれか1項に記載の切断刃。 The external area is
Has upward teeth with no outward facing teeth,
In the upward tooth, the outer hypotenuse of the upward tooth and the hypotenuse of the tooth adjacent to the upward tooth are connected by an arc.
The cutting blade according to any one of claims 1 to 7. - 前記外部エリアは、前記中央エリアに隣接して配置された側部エリアと、前記側部エリアの外側に配置された一対の端部エリアと、を有し
前記上向歯は、前記側部エリアに配置され、
前記上向歯の外側の斜辺と前記上向歯に隣接する歯の斜辺とを連接する円弧の曲率半径(R1′)は、0.3mm以上1.3mm以下である、
請求項8に記載の切断刃。 The external area has a side area arranged adjacent to the central area and a pair of end areas arranged outside the side area, and the upward tooth has the side area. Placed in
The radius of curvature (R1') of the arc connecting the outer hypotenuse of the upward tooth and the hypotenuse of the tooth adjacent to the upward tooth is 0.3 mm or more and 1.3 mm or less.
The cutting blade according to claim 8. - ロール状の包装物を収容する収容箱と、上記収容箱から引き出された上記包装物を切断する請求項1~9のいずれか1項に記載の切断刃と、を有する包装容器。 A packaging container having a storage box for storing roll-shaped packages and a cutting blade according to any one of claims 1 to 9 for cutting the packages pulled out from the storage box.
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Citations (3)
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JPH068229U (en) * | 1991-02-18 | 1994-02-01 | 本州製紙株式会社 | Vulcanized fiber toothed carton |
JP2009132406A (en) * | 2007-11-29 | 2009-06-18 | Kureha Corp | Cutting blade for packaging container, and packaging container |
JP2014188652A (en) * | 2013-03-28 | 2014-10-06 | Yamashita Insatsu Shiki Kk | Food wrap film cutting edge |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
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WO1993004935A1 (en) * | 1991-09-12 | 1993-03-18 | Honshu Paper Co., Ltd. | Sheet provided with saw teeth made of vulcanized fibers, carton to which said sheet is bonded, and method of bonding |
JP2001206363A (en) * | 2000-01-31 | 2001-07-31 | Kyodo Printing Co Ltd | Roll storage carton |
AU2003903508A0 (en) * | 2003-07-07 | 2003-07-24 | Clorox Australia Pty Limited | Film cutter bar |
JP5090778B2 (en) * | 2006-05-31 | 2012-12-05 | 株式会社クレハ | Cutting blade for packaging container and packaging container having the same |
JP5069075B2 (en) * | 2007-10-01 | 2012-11-07 | 株式会社クレハ | Cutting blade for packaging container and packaging container having the same |
JP5342853B2 (en) * | 2008-11-17 | 2013-11-13 | 株式会社クレハ | Cutting blade for packaging container, packaging container and package supply device |
JP5712297B2 (en) * | 2011-09-14 | 2015-05-07 | 旭化成ケミカルズ株式会社 | Cover cover for wound cylinder storage box and wound cylinder storage device |
CN105246789B (en) * | 2013-05-09 | 2017-06-06 | 旭化成株式会社 | Preservative film containing box |
JP2016120538A (en) * | 2014-12-24 | 2016-07-07 | 株式会社クレハ | Cutting blade for packaging film storage container, and storage container having the same |
CN108163611A (en) * | 2017-12-23 | 2018-06-15 | 何义勇 | Casing with means for cutting the preservation film |
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2019
- 2019-12-02 WO PCT/JP2019/047022 patent/WO2020188899A1/en active Application Filing
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH068229U (en) * | 1991-02-18 | 1994-02-01 | 本州製紙株式会社 | Vulcanized fiber toothed carton |
JP2009132406A (en) * | 2007-11-29 | 2009-06-18 | Kureha Corp | Cutting blade for packaging container, and packaging container |
JP2014188652A (en) * | 2013-03-28 | 2014-10-06 | Yamashita Insatsu Shiki Kk | Food wrap film cutting edge |
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JP6932286B2 (en) | 2021-09-08 |
CN113396111B (en) | 2022-04-12 |
TWI710442B (en) | 2020-11-21 |
CN113396111A (en) | 2021-09-14 |
JPWO2020188899A1 (en) | 2021-09-27 |
TW202035085A (en) | 2020-10-01 |
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