JP2013154956A - Four-sided 3d package and four-sided 3d packaging method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a four-sided 3d package that has easily-formed tearing parts arranged facing to a bag and each to be easily teared manually, in a four-sided 3d package constituted of a bag comprising a package sheet made of a laminated film.SOLUTION: In a bag, an upper face opening and a lower face seam sm2 on a lower face of the bag facing the upper face opening are provided. Also, the bag includes a left side folding line part 11 having a folding line formed on the film of the package sheet and a right side folding line part 12. From the upper face opening of the package, the object to be packed is stored in the bag. An upper face seam sm3, crossing perpendicularly to the lower face seam sm2 of the bag and sealing the upper face opening of the bag is formed. The bag is formed in a four-sided 3d shape. The folding line of the left side face folding line part 11 and the folding line of the right side face folding line part 12 are made manually tearable so that the four-sided 3d package PC with which the bag can be opened to the left and the right can be obtained.

Description

Detailed Description of the Invention

  The present invention relates to a four-sided three-dimensional package (truss-like three-dimensional package) and a four-sided three-dimensional package. The present invention relates to a four-sided three-dimensional package that forms a four-dimensional three-dimensional package using a one-layer structured film, and a four-sided three-dimensional package that uses a single-layer film. It is about the method.

  The present invention is a four-sided three-dimensional package using a packaging sheet made of a film, for example, a confectionery, processed food, agricultural product, etc. The present invention relates to a four-sided three-dimensional packaging method using a packaging sheet in which a package to be packaged is a four-dimensional solid and is made of a film.

  The four-sided three-dimensional package is used for beverages, particularly milk packs and bite-size snack packages, because a package with a minimum sheet area and a maximum internal volume can be obtained compared to a flat bag. The former milk pack is made of hard paper with a laminated inner surface, and most of the drinks are made by inserting a straw into a small hole opened upward. is not. The bite-sized knob package sold at the latter kiosk (registered trademark) etc. is torn and opened a part of a four-sided three-dimensional package formed with a thin plastic film, and takes out the packaged contents. To eat.

  As described above, the four-sided three-dimensional package has a feature that it has a maximum internal volume compared to a flat bag and has a truss structure, so that it has high strength and is not easily crushed by external force. Therefore, it can be said that it is suitable for packaging of food and the like that are crushed and damaged during stacked storage and transportation, and the quality of stored items is significantly impaired.

  The present inventor has disclosed a four-sided three-dimensional package that can be easily used as a container as it is when it is opened by tearing and opening a four-dimensional three-dimensional package formed of a packaging sheet made of a film. (WO2007 / 119780A1 patent publication).

  The four-sided three-dimensional package shown in Patent Document 1 (WO2007 / 119780A1 patent publication) is composed of a bag having a packaging sheet made of a plastic film, the bag having a left side heat-welding seam and the left side heat. A right side heat-sealing seam facing the welding seam, a lower surface folding portion of the bag body, and an upper surface opening provided on the upper surface of the bag body facing the lower surface folding portion of the bag body, The four-dimensional packaging body which sealed the said upper surface opening part which opposes a part, and formed the upper surface heat welding seam in the direction orthogonal to the said lower surface bending part.

  The technique described in Patent Document 1 (WO2007 / 119780A1 patent publication) can be eaten without using tableware because the packaged body becomes a dish as it is when opened. It eliminates the need to wash dishes, saves time, and saves detergent and water, making it easy for the environment. Also, there is no need for polystyrene foam trays used in flat bags, the cost of environmental destruction and disposal due to the use of trays, especially the release of carbon dioxide due to incineration, and the transportation of the package itself. It can be said that this technology improves the performance.

  On the other hand, as shown in Patent Document 2 (Japanese Patent Application Laid-Open No. 2003-211564), as a method of manufacturing a vertical pillow package with pleats, a wrapping sheet is fed out from a raw fabric roll so that the pleats have an arrangement pitch of a required dimension. Then, fold the folded wrapping sheet on the former and bend the cylinder, which is the packing material filling cylinder passed inside the former, into a substantially one-turn cylinder to connect both ends of the packaging sheet. Seal to form a heat weld seam.

  In the manufacturing method of the longitudinal pillow package with pleats shown in Patent Document 2 (Japanese Patent Application Laid-Open No. 2003-211564), two strips are provided at two positions by the two heat-sealing sealers at the required distance from the folds of the package below the cylinder. In addition to applying the heat welding seam, a bag cutting cut is inserted between the two heat welding seams, and the cut package is turned upside down. In this method of manufacturing a vertical pillow package with folds, folds with a fold can be continuously mass-produced to hang around the periphery of the bottom of the folds to conceal the bottom and feel a stable tight packaging form.

International Publication Number WO 2007/119780 A1 Japanese Patent Laid-Open No. 2003-211564

  In a four-sided three-dimensional package using a bag composed of a packaging sheet made of a film, it has been strongly desired to easily form a tearable portion that is arranged facing the bag and can be torn artificially. .

  In a four-sided three-dimensional package using a bag composed of a packaging sheet made of a film, it has been strongly desired to efficiently form a tearing portion that is arranged facing the bag and that can be torn artificially. .

  In a four-sided three-dimensional packaging method using a bag body composed of a packaging sheet made of a film, it has been strongly desired to easily form a tearing portion that is disposed opposite to the bag body and that can be torn artificially. .

  In a four-sided three-dimensional packaging method using a bag body constituted by a packaging sheet made of a film, it has been strongly desired to efficiently form a tearing portion that is arranged facing the bag body and each of which can be artificially torn. .

  The present invention has been made in order to solve the above-mentioned problems, and the object thereof is from a bag body that is disposed facing a bag body made of a packaging sheet and that has tearing portions that can be easily teared artificially. It is in the configured four-sided three-dimensional packaging method body.

  The present invention has been made in order to solve the above-mentioned problems, and the object thereof is from a bag body that is disposed opposite to a bag body made of a packaging sheet and that has tear parts that can be torn artificially and efficiently. It is in the configured four-sided three-dimensional package.

  The present invention has been made in order to solve the above-described problems, and has an object of having a well-tearable tear portion that is disposed opposite to a bag body made of a packaging sheet and that is easily formed artificially. It is in the four-sided three-dimensional packaging method comprised from the bag.

  The present invention has been made in order to solve the above-mentioned problems, and the object thereof is from a bag body that is disposed opposite to a bag body made of a packaging sheet and that has tear parts that can be torn artificially and efficiently. There is a configured four-sided three-dimensional packaging method.

  The present invention provides a bag formed of a packaging sheet made of a film, the bag is provided with an upper surface opening, and a lower surface seam is provided on the lower surface of the bag facing the upper surface opening, and is formed on the film of the packaging sheet A left side crease having a crease formed thereon and a right side crease having a crease formed on the film of the packaging sheet so as to face the left side crease, and the bag from the upper surface opening of the bag body Storing an article to be packaged inside the body, facing the lower surface seam of the bag body, orthogonal to the lower surface seam of the bag body, forming an upper surface seam that seals the upper surface opening of the bag body; In the case where the bag body is formed in a four-dimensional solid shape, the fold line of the left side fold part and the fold line of the right side fold part can be artificially torn so that the bag body can be opened left and right. Octopus In tetrahedral solid package according to claim.

  The present invention provides a packaging sheet made of a film provided with a left side fold part having a crease and a right side crease part having a crease, a pleat part is formed on a side surface facing the packaging sheet, and the pleat part is vertically Forming a seam, forming an upper surface opening in the packaging sheet, forming a bag body having the left side crease, the right side crease, and the upper surface opening; and forming the bag on the upper surface opening of the bag An upper surface that seals the upper surface opening of the bag body after forming a lower surface seam on the lower surface of the bag body facing and storing an article to be packaged in the bag body from the upper surface opening portion of the bag body Forming a seal, forming the bag containing the article to be packaged into a four-sided three-dimensional package, enabling the folds of the left side fold part and the folds of the right side fold part to be artificially torn, The bag can be opened left and right In tetrahedral solid packing method characterized by the way.

  According to the present invention, there is obtained a four-sided three-dimensional package composed of a bag body that is disposed to face a bag body made of a packaging sheet and that has a tear portion that can be easily teared artificially.

  According to the present invention, there is obtained a four-sided three-dimensional package composed of a bag body that is disposed to face a bag body made of a packaging sheet and that has a tear portion that can be torn artificially and efficiently.

  According to the present invention, a four-sided three-dimensional wrapping method is obtained which is formed by facing a bag body made of a wrapping sheet and each of which has a tear portion that can be easily teared artificially.

  According to the present invention, a four-sided three-dimensional wrapping method is obtained which is configured to be opposed to a bag body made of a packaging sheet and each of which has a tear body that can be torn artificially and efficiently.

A flat sheet of one four-sided three-dimensional package that is supplied to a former by being wrapped around an original roll of a vertical pillow wrapping machine with folds, which is a packaging sheet constituting the four-dimensional three-dimensional package of the present invention. It is a top view of the packaging sheet which forms. 1 is a cross-sectional view of a packaging sheet for forming a bag body of a four-dimensional three-dimensional packaging body according to an embodiment of the present invention, which is supplied to a former of a pleated vertical pillow packaging machine and processed by a vertical sealer to form one seam. FIG. It is a top view of the flat bag body which consists of a packaging sheet which has one seam which forms the flat bag body of the four-sided three-dimensional package of one Example of this invention. It is a perspective view of the flat bag body which consists of a packaging sheet which has one vertical seam of the four-sided three-dimensional package of one Example of this invention. It is a top view of the four-sided three-dimensional package which has the flat bag body which consists of a packaging sheet which comprises the four-dimensional three-dimensional package of one Example of this invention. It is a side view of the four-sided three-dimensional package which has a bag which consists of a packaging sheet which comprises the four-dimensional three-dimensional package of one Example of this invention. It is a perspective view which tears the crease | fold of the side fold part of the four-dimensional three-dimensional package which has a bag body which consists of a packaging sheet which comprises the four-dimensional three-dimensional package of one Example of this invention. It is the perspective view formed by tearing the crease | fold of the side fold part of the four-sided three-dimensional package which has the bag body which comprises the packaging sheet which comprises the four-dimensional three-dimensional package of one Example of this invention.

  Hereinafter, the configuration of the four-sided three-dimensional package, which is an embodiment of the present invention, its manufacturing process, packaging method, and the like will be described in detail. The four-sided three-dimensional package which is one Example of this invention is comprised from a flat bag body initially. First, an example of the manufacturing process of a flat bag body is demonstrated based on FIG.1, FIG.2, FIG.3 and FIG.

  FIG. 1 is a packaging sheet for forming a bag body of a four-sided three-dimensional packaging body according to one embodiment of the present invention, and one four-sided three-dimensional packaging that is wound on a raw roll of a vertical pillow packaging machine and fed to a former. It is a top view of the packaging sheet which forms the flat bag body of a body. In FIG. 1, the packaging sheet SH is a packaging sheet SH having a transparent, translucent, or opaque single-layer plastic film. As the packaging sheet SH, for example, a heat-weldable single-layer plastic film of polypropylene, polyethylene, nylon, or polyester is used.

  The packaging sheet SH forming the four-sided three-dimensional packaging body bag according to one embodiment of the present invention is first prepared as a packaging sheet SH made of a flat single-layer plastic film. The edge portions on both side surfaces of the flat packaging sheet SH are overlapped, and the stacked packaging sheet SH is bent by a folding machine such as a double folding machine. A process of forming a crease in the stacked packaging sheet SH is performed. A pleat overlapped with both side edge portions of the packaging sheet SH is formed. Then, the folded fold portion of the packaging sheet SH having the two crease portions 11 (side AB) and the crease portion 12 (side CD), which are creased, is opened and extended, and the original shown in FIG. Return to the flat packaging sheet SH in the state.

  As described above, in the present invention, the film of the packaging sheet SH is preliminarily subjected to the crease forming process before being wound on the roll of the vertical pillow wrapping machine and supplied to the former. In the present invention, the film of the packaging sheet SH is folded, and then the fold of the left side fold portion (side AB) 11 of the film and the fold of the right side fold portion (side CD) 12 of the film are strongly folded. It is important to crease the film.

  The left side crease of the film so that the crease of the left side fold part (side AB) 11 and the right side crease part (side CD) 12 of the film of the packaging sheet SH can be easily and efficiently torn by hand. The tear strength of the fold of the film of the left side fold part 11 and the fold of the film of the right side crease part 12 by means of heat, pressure, ultrasonic wave, laser, etching, etc. It is also necessary in some cases to weaken the thickness and provide a fragile portion in the fold of the film of the packaging sheet SH.

  FIG. 1 shows a wrapping sheet SH before being supplied to a former by being wound around a roll of a vertical pillow wrapping machine with pleats. The wrapping sheet SH has a fold portion 11 (side AB) and a fold portion 12 (side CD) of the film parallel to the inside in the vertical direction formed by a folding machine such as a double folding machine. Both side edge portions of the packaging sheet SH are formed in the left fold portion 13a and the right fold portion 13b of the package.

  Actually, a long wrapping sheet SH is rolled around the outer periphery of a cylinder of a former of a vertical pillow wrapping machine with folds, and a film of the wrapped wrapping sheet SH is appropriately cut and used to form a single four-sided solid. Make a package. As shown in FIG. 1, the packaging sheet SH which forms the flat bag body of one four-dimensional solid packaging body has the horizontal width w0. w1 is the width between the left side fold portion 11 and the right side fold portion 12 of the packaging sheet SH, w2 is the width between the left fold portion 13a and the right fold portion 13b, and w3 is the width between the left side fold portion 11 and the left fold portion 13a. And the width between the right side fold portion 12 and the right fold portion 13b.

  Here, the width w1 between the left side crease part 11 and the right side crease part 12 of the film of the packaging sheet SH is a half circumference length that is a half of the outer circumference length of the cylinder of the pleated vertical pillow packaging machine, The sum of the width w3 between the surface fold portion 11 and the fold portion 13a and the width w3 between the right side fold portion 12 and the fold portion 13b is the width w1 between the left side fold portion 11 and the right side fold portion 12 of the packaging sheet SH. (W3 + w3 = w1).

  FIG. 2 is a packaging sheet for forming a flat bag body of a four-sided three-dimensional packaging body according to an embodiment of the present invention, which is supplied to a former of a pleated vertical pillow packaging machine and processed by a vertical sealer to form a vertical seam. It is sectional drawing of a sheet | seat. The wrapping sheet SH is supplied to the former of the vertical pillow wrapping machine with folds, and is wound around the outer periphery of the cylinder. The left pleat portion 13a and the right pleat portion 13b of the film of the packaging sheet SH wound around the outer periphery of the cylinder are overlapped facing the cylinder.

  Using the vertical sealer provided in the vertical pillow wrapping machine with pleats, a vertical seam sm1 extending in a vertical direction with respect to the cylinder is formed on a part of the left pleat portion 13a and the right pleat portion 13b of the film on which the packaging sheet SH is overlaid. Form. The film of the packaging sheet SH is subjected to a vertical seam sm1 by a heat welding means or the like and sealed. The vertical sm1 seam can be sealed not only by heat fusion using ultrasonic waves or electromagnetic induction waves, but also by a hot wire method typified by a nichrome wire.

  FIG. 3 is a plan view of a flat bag body formed of a packaging sheet having one seam forming the flat bag body of the four-sided three-dimensional package of one embodiment of the present invention. One flat bag body FB is formed by one packaging sheet SH. The flat bag body FB includes a left side fold portion 11, a right side fold portion 12 facing the left side fold portion 11, an upper surface opening portion 14 at an upper portion, and a lower surface opening portion 15 facing the upper surface opening portion 14. ing. The left fold portion 13a and the right fold portion 13b extend between the upper surface opening portion 14 and the lower surface opening portion 15 in the vertical direction substantially at the center.

  The left fold 13a and the right fold 13b of the film of the packaging sheet SH are folded, and a vertical seam sm1 is formed on the left side of the folded left fold 13a and the right fold 13b of the film. The packaging sheets SH are simply overlapped on the right side of the folded left pleat 13a and right pleat 13b. The left pleat portion 13a and the right pleat portion 13b of the film are placed flatly in the lateral direction of the packaging sheet SH.

  FIG. 4 is a perspective view of a flat bag body made of a packaging sheet having one seam that forms a flat bag body of a four-sided three-dimensional package according to an embodiment of the present invention. As shown in FIG. 4, the flat bag body FB folds the film of the sheet SH to form a left side fold portion 11 and a right side fold portion 12. The left side fold portion 11 is indicated by side AB. The right side crease portion 12 is provided to face the left side crease portion 11 and is indicated by a side CD.

  The flat bag body FB formed on the film of the packaging sheet SH shown in FIG. 4 has a left side fold portion 11 (side AB) and a right side fold portion 12 (side CD) of the film facing each other. ing. Further, a corner E is formed at the middle of the side A-D facing the upper welding corner F of the vertical seam sm1, and a corner at the middle of the side B-C facing the lower welding corner H. G is formed.

  A horizontal lower surface seam sm2 is formed in the lower surface opening 15 of the packaging sheet SH of the flat bag body FB using the horizontal sealer provided in the vertical pillow packaging machine with folds. The lower surface opening 15 of the packaging sheet SH is sealed with the lower surface seam sm2. Accordingly, the flat bag body FB includes the upper surface opening 14, the lower surface seam sm2, the left side fold part 11, the right side crease part 12, and the vertical seam sm1. A lower surface seam sm2 is applied to the packaging sheet SH of the flat bag body FB by heat welding means or the like, and sealed. The lower surface seam sm2 can be sealed not only by heat fusion using ultrasonic waves or electromagnetic induction waves, but also by a hot wire method typified by a nichrome wire.

  Widen the upper opening 14 of the flat bag body FB, and store the storage items such as vegetables such as baby leaves, rice such as red rice and pilaf, food such as snacks and other foods from the bagging machine. To do. As the packaged items, plastic model parts, small items such as screws, and the like can be considered, and even those types of items can be stored in the bag body FB.

  Next, a procedure and a method for forming a four-sided three-dimensional package using the flat bag body FB shown in FIG. 4 will be described with reference to FIGS.

  FIG. 5 is a plan view of a flat bag body made of a packaging sheet constituting the four-sided three-dimensional package of one embodiment of the present invention. After the stored item, which is an item to be packaged, is stored in the flat bag body FB from the upper surface opening 14, as shown in FIG. 5, the corner A and the corner portion D of the flat bag body FB are aligned. As a result, the upper surface seam sm3 (side E) is formed between the rear corner E and the front corner F by heat welding means or the like in accordance with the upper corner A of the left side fold portion 11 and the upper corner D of the right side fold portion 12. -F) is formed and bonded. The packaging sheet SH is provided with an upper surface seam sm3 by heat welding means and sealed. The upper surface seam sm3 can be sealed not only by heat fusion using ultrasonic waves or electromagnetic induction waves, but also by a hot wire method typified by a nichrome wire.

  Thus, the upper surface opening 14 of the flat bag body FB is sealed with the upper surface seam sm3 (side EF). An upper surface seam sm3 (side EF) for sealing the bag body FB is provided on the upper surface of the flat bag body FB substantially orthogonal to the side BC. As a result, a four-sided three-dimensional package PC having a truss-like three-dimensional configuration is obtained.

  FIG. 6 is a side view of a four-sided three-dimensional package having a bag made of a packaging sheet constituting the four-sided three-dimensional package of one embodiment of the present invention. In FIG. 6, a four-sided three-dimensional package PC having a truss configuration having four side surfaces including a corner E, a corner F, a corner B, and a corner C, which are four corners, was obtained.

  The four-sided three-dimensional package PC has a left side fold part 11, a right side crease part 12, and a bottom face fold part (side B-C) 12, and the upper surface seam sm3 is formed by a heat welding method. In the four-dimensional package PC, the upper surface seam sm3 (side EF) is orthogonal to the lower surface bent portion (side BC) 12 of the bag body FB.

  The four-sided three-dimensional package PC has a four-dimensional solid shape and is configured as a truss-like four-sided three-dimensional package. The four-sided three-dimensional package PC includes an upper surface seam sm3 (side EF), a left side crease portion 11, a lower surface seam sm2, and a right side crease portion 12. The upper surface seam sm3 (side EF) is provided on the bag body FB substantially orthogonal to the lower surface seam sm2.

  In FIG. 6, the four-sided three-dimensional package PC is cut out in an inverted triangle shape at the upper end of the left side fold portion 11 of the film and at the upper end of the right side fold portion 12. A notch 16b is provided. The depths of the cutouts of the cutout portion 16a and the cutout portion 16b are shorter than the seam longitudinal width of the upper surface seam sm3 and do not penetrate the seam of the upper surface seam sm3. Furthermore, the four-sided three-dimensional package PC is provided with reinforcing portions 17a and 17b of the four-dimensional three-dimensional package PC at each of the corner portion B and the corner portion C.

  In the above-described embodiment of the present invention, the left side fold portion 11 and the right side fold portion 12 are notched in an inverted triangular shape, but other shapes such as U-shaped notches Alternatively, it may be a simple straight cut portion. The notch portion including these cut portions is provided at the start of tearing of the respective folds of the left side fold portion 11 and the right side fold portion 12, and is a guide point for tearing the bag body FB of the four-sided three-dimensional package PC. Become.

  FIG. 7 is a perspective view of a crease in a fold portion of a four-sided three-dimensional package having a bag made of a packaging sheet constituting the four-dimensional three-dimensional package of one embodiment of the present invention. The taking-out of the stored goods which are to-be packaged objects from the four-dimensional three-dimensional package PC of one Example of this invention is demonstrated.

  First, the fingers of both hands hold the cutout portion 16a of the left side fold portion 11 and the cutout portion 16b of the right side fold portion 12 of the four-sided package PC. Next, the fold of the film of the left side fold portion 11 and the fold of the film of the right side fold portion 12 of the four-sided three-dimensional package PC are cut from the top to the bottom along the fold. At this time, the fold of the film of the left side fold portion 11 and the fold of the film of the right side fold portion 12 are sequentially torn along the fold from the upper side to the lower side.

  As a result, as shown in FIG. 7, corner A is separated into corner A1 and corner A2, and corner D is separated into corner D1 and corner D2. The upper surface seam sm3 is separated into a left upper surface seam sm3a and a right upper surface seam sm3b. The fold of the film of the left side fold portion 11 is broken and peeled off from the cutout portion 16a of the four-sided three-dimensional package PC, and is easily torn down along the fold, and the right-side fold portion is cut from the cutout portion 16b of the four-dimensional three-dimensional package PC. The folds of the 12 films can be broken and peeled off and easily torn along the folds downward. In this way, the film fold of the left side fold portion 11 and the film fold of the right side fold portion 12 of the four-sided three-dimensional package PC are artificially easily peeled to the left and right along the crease, and then torn, and the four-dimensional solid is obtained. The package PC can be easily opened.

  FIG. 8 is a perspective view formed by tearing the crease of the fold portion of the four-sided three-dimensional package having a bag made of the packaging sheet constituting the four-dimensional three-dimensional package of one embodiment of the present invention. In FIG. 8, the crease in the left side crease part 11 and the crease in the film in the right side crease part 12 are sufficiently torn along the crease. The four-sided cubic package PC has a dish shape using the reinforcing portions 17a and 17b. For this reason, the four-sided cubic package PC can be used as tableware. Since the four-sided cubic package PC itself functions as tableware after opening, it is not necessary to prepare tableware for eating.

  Thus, according to one embodiment of the present invention, especially when the film fold of the left side fold portion 11 and the film fold of the right side fold portion 12 of the four-sided cubic package PC are sufficiently peeled off and opened by tearing. In addition, it is effective in a large-capacity four-sided three-dimensional package PC having a tableware function.

  In the above-described embodiment of the present invention, the pleat portion of the flat bag body is positioned at a substantially intermediate portion between the left side fold portion and the right side fold portion. You may position it biased to the left side or the right side. In the flat bag body in which the pleat portions are offset, the position of the vertical seam does not form the corner portion of the four-dimensional package. In this case, one side of the side surface of the four-dimensional package is a simple bent portion of the flat bag that does not include a vertical seam.

  DESCRIPTION OF SYMBOLS 11 ... Left side crease part 12 ... Right side crease part 13a ... Left fold part 13b ... Right fold part 14 ... Upper surface opening part 15 ... Lower surface opening part 16a, 16b ... Notch part 17a, 17b ... Reinforcement part A, A1, A2, B, C, D, D1, D2, E, F, G, H ... Corner part FB ... Flat bag PC ... Four-sided three-dimensional package SH ... packaging sheet sm1 ... vertical seam sm2 ... bottom surface seam sm3, sm3a, sm3b ... top surface seam

Claims (8)

  A sack formed of a packaging sheet made of a film, the sack is provided with an upper surface opening, a lower surface seam on the lower surface of the bag opposite to the upper surface opening, and a fold formed on the film of the packaging sheet A left side crease portion and a left side crease portion facing the left side crease portion, and a right side crease portion having a crease formed in the film of the packaging sheet, and from the upper surface opening of the bag body to the inside of the bag body An upper surface seam that accommodates an object to be packaged, faces the lower surface seam of the bag body, is orthogonal to the lower surface seam of the bag body, and seals the upper surface opening of the bag body, What is formed in a four-dimensional solid shape is characterized in that the folds of the left side fold part and the folds of the right side crease part can be artificially torn and the bag body can be opened left and right. When That tetrahedral three-dimensional packaging.   2. The four-sided three-dimensional package according to claim 1, wherein the film of the packaging sheet is a single-layer plastic film made of polypropylene, polyethylene, nylon, polyester, or the like.   The four-sided three-dimensional package according to claim 1, wherein the four-dimensional three-dimensionally packaged body has a notch at each of an upper end of the fold of the left side fold and a top of the fold of the right side fold.   The four-sided three-dimensional package according to claim 1, wherein a fragile portion is formed in the fold of the left-side fold and the fold of the right-side fold.   Preparing a wrapping sheet made of a film provided with a left side crease part having a crease and a right side crease part having a crease, forming a pleat part on a side surface facing the packaging sheet, and forming a vertical seam on the pleat part; Forming an upper surface opening in the packaging sheet, forming a bag body having the left side fold portion, the right side fold portion and the upper surface opening, and facing the upper surface opening portion of the bag body Forming a lower surface seam on the lower surface of the body, storing an article to be packaged in the bag body from the upper surface opening portion of the bag body, and then forming an upper surface seal for sealing the upper surface opening portion of the bag body; Forming the bag body containing the article to be packaged into a four-sided three-dimensional package, enabling the fold line of the left side fold part and the fold part of the right side fold part to be artificially torn, and It can be opened left and right Tetrahedral solid packaging wherein the.   6. The four-sided three-dimensional packaging method according to claim 5, wherein the film of the packaging sheet is a single-layer plastic film made of polypropylene, polyethylene, nylon, polyester or the like.   6. The four-sided three-dimensional packaging method according to claim 5, further comprising a notch at each of an upper end of the fold of the left side fold and an upper end of the fold of the right side fold.   6. The four-sided three-dimensional packaging method according to claim 5, wherein a fragile portion is formed at the fold of the left-side fold and the fold of the right-side fold.

Images