JP2006273380A - Sheet packaging method and sheet package - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide sheet packaging method by which a half of a product is wrapped in a sheet folded in a rectangular package and the other half is wrapped in the sheet in a pillow package, thereby obtaining a new packaging form having features of both the packaging forms and to provide a sheet package. <P>SOLUTION: A seal block 2 is placed in the middle and near the bottom 1b of a wrapping sheet 1 the shape of which is such that angles except the apex angle of an isosceles triangle are cut off or folded. Then, wrapping sheet portions 1d and 1e left around the seal block 2 are folded along the peripheral faces of the seal block 2. Next, a heat seal is formed on the back side of the seal block 2, thereby forming a bottomed rectangular tubular body 3. An item is placed into the bottomed rectangular tubular body 3 after the seal block 2 is pulled out. After the item is placed, the opening, or the end, of the bottomed rectangular tubular body 3 is sealed as in a pillow package. Thus, folding the sheet into a rectangular package imparts a traditional Japanese packaging style and, at the same time, forms tight seals and allows the package to be opened easily. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sheet packaging method for packaging a package with a sheet-shaped packaging material, and a sheet package manufactured by such a method.

  Conventionally, as an example of a package in which a package is packaged using a single sheet, there is a square folded package. Square fold packages are Japanese-style packages, and are often used for packaging Japanese sweets such as hot spring buns. As shown in FIG. 8, the square folded package is obtained by placing a package in the center of a square film-like sheet and sealing the corners of the sheet on the diagonal line of the sheet toward the center.

An example of the packaging process of the square fold packaging is shown in FIG. As shown in FIG. 8 (a), a product W as a package is placed in the center of the wrapping paper 20 formed in a square, and as shown in FIG. 8 (b), one corner of the wrapping paper 20 is placed. 20a is moved onto the package (folding step 1). Next, as shown in FIG. 2C, the corner 20b diagonally opposed to the folded corner 20a is folded so as to overlap the already folded corner 20a (folding step 2). Next, as shown in FIG. 4D, when both folding steps 1 and 2 are performed, the folded portions 20a and 20b of the wrapping paper 20 are placed along the product W, and the folded portions 20a and 20b and the product W are separated. Make the gaps between them as small as possible. In relation to the remaining unfolded corner portion 20c, the side portion is folded inward as a gusset, and the corner portion 20c is further overlapped on the corner portions 20a and 20b that have already been folded (folding step 3). Finally, as shown in FIG. 5E, the last remaining corner portion 20d is folded in the same manner as in the folding step 3, and further overlapped on the stacked corner portion 20c (folding step 4). Or it is attached with glue.

  Such a square folded package has the advantage that it can be opened easily without being damaged, and can be opened without damaging the package. However, the corner 20d that is folded last is further overlapped with the corners 20a to 20c that have already been folded together to form at least a quadruple, and it is very difficult to seal all the folded packaging materials. is there. It can be considered that the seal bar is strongly applied when sealing, but the product A is damaged, and the product A is soft even if the seal bar is strongly applied. You cannot successfully get a good seal.

  In this way, as shown in FIG. 8 (f), the corner folded packaging body 21 is in its packaging form, that is, a portion in which the corners 20 a to 20 d of the sheet 20 are brought close to the central portion and sealed or adhered with glue. However, since the packaging materials are partially overlapped, sealed packaging cannot be performed. Therefore, there is a possibility that air, insects or foreign matters that are not necessarily sterilized may enter from the four corner portions 22a to 22d and the central portion 22e of the corner folded package 21 that are not sealed. Since there is a possibility that bacteria floating in the air may enter and propagate, there is a problem that the shelf life of the product W is poor.

  As an individual package of a package such as Japanese confectionery, horizontal pillow packaging is currently a common packaging form. As shown in FIG. 9 for an example of a packaging process, horizontal pillow packaging places a product as a package inside a cylindrical packaging material while forming a sheet-shaped packaging material into a cylindrical shape. Then, the both ends of the cylindrical packaging material are center-sealed, and a transverse end seal is applied before and after the package. That is, as shown in FIG. 9A, a product W as a package is placed in the center of a rectangular packaging sheet 30 and the axis around the axis parallel to the direction along the long side of the packaging sheet 30 is an axis around the product W. Then, the edge portions 30a and 30b of the packaging sheet 30 are heat-sealed with a palm shape, and the cylindrical packaging sheet 31 is formed as the center seal portion 32 (FIG. 9B). Next, the center seal portion 32 is laid down (FIG. 9C). Next, the open end portions 33 and 34 of the cylindrical packaging sheet 31 are deformed so as to be flattened, and the flat end portions 33 and 34 are heat sealed to form end seal portions 35 and 36 ( FIG. 9 (d)). A sealed pillow package 40 can be obtained by a total of three seals.

  The state of opening the pillow package is shown in FIG. In order to open the pillow package 40, the end seal portions 35 and 36 of the both end portions 33 and 34 can be easily opened by cutting with scissors, but the end seal portions 35 and 36 can be opened by hand. The product W may be damaged. As shown in FIG. 10A, a notch 37 for opening is sometimes formed in the end seal portion 35 in advance, but the packaging sheet 30 may be cut obliquely. Further, at the time of opening, as shown in FIG. 10B, if the product W is soft, there is a possibility that the product W may be damaged together with the packaging sheet 30 as the tear 38 advances. .

  In addition, in horizontal pillow packaging, when trying to perform tight packaging with as little space as possible around the product W as in the case of square fold packaging, there is a possibility that the product W will be bitten when sealed and the product W when opened. May hurt. As an improvement plan of pillow packaging, there is one in which the length of the packaging sheet is made longer than the length normally used, and an excessive end portion is bent to the back side of the package to improve the appearance (see Patent Document 1). ), However, use packaging sheets unnecessarily, and there are aspects that are avoided because of economic, energy saving, and environmental considerations.

JP-A-61-11111 (Page 2, lower right column, line 13 to page 3, upper left column, line 19, lines 8 to 16)

  Thus, when packaging a product with a sheet, there is a problem to be solved in that a half of the product is square-folded and the remaining half is pillow-wrapped to obtain a packaging form having the characteristics of both packaging forms.

  An object of the present invention is to provide a sheet packaging method and a sheet packaging body that can obtain a packaging form that can be sealed and easily opened while maintaining a Japanese-style packaging produced by square-fold packaging. It is to be.

  In order to solve the above-mentioned problems, a sheet packaging method according to the present invention includes a seal block at the center of the packaging sheet and near the bottom on the packaging sheet truncated or folded at both corners other than the apex angle of the isosceles triangle shape. Folds the both side portions and the apex portion of the packaging sheet left around the seal block along the peripheral surface and the end surface of the seal block and uses the seal block as a backing. Folding / first sealing step for sealing the overlapping region between the side portions and the apex angle portion to form a square bottom tubular body, a seal block pulling step for pulling out the seal block from the square bottom tubular body, and the seal A package loading process for loading a package into the square bottom cylindrical body from which the block has been pulled out, and a second sealing process for sealing an opening of the square bottom cylindrical body. It consists et al.

  According to this sheet packaging method, in the preparation step, the seal block is placed at the center of the packaging sheet and closer to the bottom on the packaging sheet that has been truncated or folded at both corners other than the apex angle of the isosceles triangle. The Since the packaging sheet is folded around the sealing block, the sealing block serves as a guide for folding and is used as a backing when sealing the packaging sheet in a later sealing step. Around the seal block, an apex angle portion including an isosceles triangular apex angle and both side portions that are truncated or folded back are left. In the next folding / first sealing step, both side portions and the apex portion of the packaging sheet left around the sealing block are folded along the peripheral surface and end surface of the sealing block, and both side portions of the packaging sheet The overlapping area of the top corners is sealed with the seal block as a backing, and the packaging sheet is formed into a square bottom cylindrical body around the seal block. Of the square-bottomed cylindrical body, the base part of the isosceles triangle becomes a cylindrical opening when the body is wound. In the next seal block pulling step, the seal block is pulled out from the square bottom cylindrical body. Further, in the package loading process, the package is loaded into the square bottom cylindrical body from which the seal block has been pulled out. Further, in the next second sealing step, the opening of the square bottom cylindrical body loaded with the package is sealed, whereby the package is packaged by the packaging sheet.

  On the other hand, the sheet packaging body according to the present invention is formed in a body winding by folding both side portions and the apex portion of the packaging sheet that is truncated or folded at both corners other than the apex angle of the isosceles triangle shape, and is a square bottom tube The overlapping region of the both side portions and the apex corner portion of the shaped body is sealed by the first seal portion, and the square bottom tubular body that accommodates the package inside, and the first portion applied to the opening of the square bottom tubular body 2 seal portions.

  According to this sheet packaging body, packaging is carried out in a square-bottomed tubular body formed by folding both side portions and apex corner portions of the packaging sheet that is truncated or folded at both corners other than the apex angle of the isosceles triangle shape. Things are housed. Of the square-bottomed cylindrical body, the base part of the isosceles triangle becomes a cylindrical opening when the body is wound. The first seal portion is formed by sealing the overlapping region between the both side portions and the apex angle portion of the square bottom cylindrical body, and one end shape of the square bottom cylindrical body is defined in a corner folded state. In addition, the second seal portion is applied to the opening of the square bottom tubular body, and the other end shape of the square bottom tubular body is defined in a pillow packaging state. Since one end portion is in a corner folded state, both ends have a higher degree of freedom for sitting as a pillow packaging package, and the square bottom tubular body can be easily opened from the corner folded state side. .

  In this sheet wrapping method, in the folding / first sealing step, the apex angle portion can be folded after folding both side portions of the packaging sheet in a state of being wound around the seal block. In the sheet package, the apex angle portion can be folded on both side portions of the packaging sheet that are folded. When both side portions of the packaging sheet are folded back onto the seal block, the hypotenuses of the isosceles triangle intersect and the hypotenuses overlap the collar and are wound around. By folding the remaining apex portion, the apex portion is overlapped with the collar-shaped hypotenuse to form a square-bottom cylindrical body. Therefore, in a square bottom cylindrical body, the part which is not covered with a packaging sheet does not arise.

  Moreover, in this sheet packaging method, the second sealing step can end-seal the opening in a state where the gusset is folded from both sides of the opening of the square bottom cylindrical body. Moreover, in this sheet packaging body, gussets can be formed by folding on both sides of the opening of the square bottom cylindrical body. The opening of the square-bottomed cylindrical body formed by being wound on the body is simply formed by end sealing, so that both end portions of the end sealing portion protrude to the side of the package. By folding the gusset in advance, the both end portions of the end seal portion can be formed in a compact form that does not protrude to the side of the package.

  Furthermore, in this sheet packaging method, the sealing in the folding / first sealing step and the second sealing step may be a heat sealing step. In the sheet package, the first seal portion and the second seal portion can be heat seal portions as hermetic seal portions. The seal portions obtained by the folding / first sealing step and the second sealing step are the first seal portion and the second seal portion in the sealed package, but by using the heat seal portion as the hermetic seal portion, the outside air It is possible to prevent insects, insects, or foreign substances from entering.

  Since the sheet packaging method and the sheet packaging body according to the present invention are configured so that one side of the packaging body is in a corner folded packaging and the other side has a form of pillow packaging as described above, Overlap of four or more wrapping materials that occurred in conventional corner folding does not occur, and it becomes easy to seal the wrapping material that overlaps with a smaller number of sheets using a backing. High sealing performance by packaging can be obtained. In addition, with this sheet packaging method and sheet packaging body, it is possible to obtain a package body that is surely hermetically sealed while maintaining the Japanese-style packaging that the square fold packaging brings about as a whole. Therefore, a reliable seal such as a heat seal can be obtained, and it is possible to prevent the outside air including mold and fungus, small insects, or foreign matters from entering.

  Embodiments of a sheet packaging method and a sheet package according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing an example of a preparation step in one embodiment of a sheet packaging method according to the present invention, and FIG. 2 is a drawing / folding performed after the preparation step in the sheet packaging method according to the present invention shown in FIG. It is a perspective view which shows an example of a 1st sealing process.

  In the sheet packaging method according to the present invention, the preparation step shown in FIG. 1 is performed before packaging is started. In the preparation step, first, an isosceles triangular packaging sheet 1 is prepared as shown in FIG. The isosceles triangular packaging sheet 1 can be easily obtained by bisecting a square packaging sheet along a diagonal line. The packaging sheet 1 may be a triangle, and is not necessarily an isosceles triangle or a right-angled isosceles triangle. This is advantageous for packaging in that the product can be folded and folded and the product can be efficiently covered. As shown in FIG.1 (b), both corners 1c and 1c of the base 1b of the packaging sheet 1 are bent or cut along a line parallel to a bisector passing through the vertex 1a of an isosceles triangle. . Both side corners 1c and 1c are extra portions for product packaging, and are difficult to handle in a wrapping operation such as folding, so they are folded or cut in advance. FIG. 1C shows a state in which the product W to be packaged is placed on the packaging sheet 1 obtained by cutting the side corners 1c and 1c.

  Following the preparation step, the folding / first sealing step shown in FIG. 2 is performed. In the folding / first sealing step, first, a seal block 2 as a pseudo package conforming to a package that is a product is placed on the packaging sheet 1 (FIG. 2A). The seal block 2 is placed at the center of the packaging sheet 1 and a part of the seal block 2 protrudes from the bottom 1b. Around the seal block 2, an apex angle portion 1d including the apex 1a of the packaging sheet 1 and both side portions 1e and 1e are left. The mounting position of the seal block 2 on the packaging sheet 1 is a position where the corner folded packaging is successfully completed by the apex angle portion 1d including the apex 1a of the packaging sheet 1 and the both side portions 1e and 1e. As will be described later, since the packaging sheet 1 is folded along the periphery of the sealing block 2, the sealing block 2 serves as a guide for the folding, and a backing when the packaging sheet 1 is sealed with a heat sealing block in a later sealing step. Used as

  After placing the seal block 2 on the packaging sheet 1, the side sheets 1 e and 1 e of the packaging sheet 1 remaining around the seal block 2 are sequentially folded around the seal block 2 and stacked one above the other. 1 is wound (FIG. 2B). Next, the apex angle portion 1d of the packaging sheet 1 is folded along the end surface 2a of the seal block 2 and the trunk peripheral surface 2b following the end surface 2a. At this time, by folding the gusset along the end surface 2 a of the seal block 2, the packaging sheet 1 is folded into a corner folded state along the end surface 2 a of the seal block 2. When folding the apex portion 1d, it is preferable to make a firm crease along the end face 2a of the seal block 2.

  Heat seal 4a is applied to the overlapping part of both side parts 1e, 1e, and the edge part of apex angle part 1d and the edge part of both side parts 1e, 1e that have already been folded are overlapped as a glue margin part. The heat seal 4b is applied to the overlapping portion. The square bottom cylindrical body 3 is formed by the heat seals 4a and 4b (FIG. 2C). Both the heat seal 4a and the heat seal 4b are obtained by pressing the heat seal block 7 against the overlapping portion of the packaging sheet 1 with the seal block 2 as a backing. Since the seal block 2 is used as a backing, the packaging sheet 1 is not distorted even when the heat seal block 7 is strongly pressed, and accurate heat sealing can be performed. The heat seal block 7 includes at least a seal block that heat seals the overlapping portion of the apex angle portion 1d and the side portions 1e and 1e, and a seal block that heat seals the apex angle portion 1d to the end face. In FIG. 2C, the former seal block is indicated by reference numerals 7a and 7b, and the latter seal block is indicated by reference numeral 7c. The area of heat sealing by the seal block 7c is shown as a shaded portion in FIG. The seal blocks 7a and 7b are drawn as separate parts in this example, but may be integrated.

  By connecting the heat seal 4a of both side portions 1e, 1e and the heat seal 4b to both side portions 1e, 1e of the apex angle portion 1d, the square bottom and the body winding of the square bottom tubular body 3 are sealed. Blocked. By the connected heat seal 4a and the heat seal 4b, the first seal portion 4 including the apex angle portion 1d and the side portions 1e and 1e of the square bottom tubular body 3 is formed. The heat seal 4a on both side portions 1e and 1e and the heat seal 4b on both side portions 1e and 1e of the apex angle portion 1d may be subjected to the heat seal 4b after the heat seal 4a is performed first, or , May be applied simultaneously. FIG. 2D shows a state in which the square bottom cylindrical body 3 is heat-sealed.

  After the folding / first sealing step, the seal block 2 is pulled out of the square bottom tubular body 3 in the seal block pulling step. Since a part of the seal block 2 protrudes from the square bottom cylindrical body 3, the drawing process is performed smoothly, and the shape of the square bottom cylindrical body 3 does not collapse at that time. Of the square-bottomed cylindrical body 3, the portion of the bottom side 1 b of the packaging sheet 1 becomes a cylindrical opening 5 when the body is wound. An example of a square bottom cylindrical body 3 from which the seal block 2 has been pulled out is shown as a perspective view in FIG.

  Following the seal block drawing process, a package loading process for loading a package is performed. An example of the package loading process is shown as a perspective view in FIG. In the package loading process, the product W as a package is loaded from the opening 5 into the square bottom cylindrical body 3 from which the seal block 2 has been pulled out. Although the shape of the square bottom cylindrical body 3 can be slightly modified, it is preferable that the cross-sectional size of the product W is within the range of the outline of the opening 5.

  Following the package loading process, a second sealing process is performed to seal the opening of the square bottom cylindrical body. An example of the second sealing step is shown as a perspective view in FIG. In the second sealing step, sealing is performed in a manner similar to heat-sealing a cylindrical packaging material filled with a product in the transverse direction, such as horizontal pillow packaging. That is, the opening 5 of the square bottom cylindrical body 3 loaded with the product W is clamped by two opposing heat seal bars 8 and 8 arranged in a state extending in a direction crossing the square bottom cylindrical body 3. Is heat sealed. When clamping with the heat seal bars 8, 8, it is preferable to put gusset into the opening 5 from the side. By inserting the gusset, it is possible to prevent the lateral protrusion due to the flattening of the opening 5 during heat sealing. The heat seal portion applied to the opening 5 of the square bottom cylindrical body 3 becomes the second seal portion 6. By the second seal portion 6, the other end shape of the square bottom tubular body 3 is defined in a pillow packaging state. The first seal part 4 and the second seal part 6 complete the sealed packaging of the product W by the packaging sheet 1.

  An example of the completed sheet package 10 is shown in FIG. 6A is a perspective view of the sheet packaging body according to the present invention as seen from the back side, and FIGS. 6B and 6C are front views of the sheet packaging body shown in FIG. It is the perspective view seen from diagonally or the back side. As shown to Fig.6 (a), the one side part 11 of the sheet | seat package 10 is a state of square fold packaging, and is maintaining the packaging form with a Japanese feeling, without damaging a package. In addition, it has an advantage that it can be easily opened by peeling off the part that is folded and becomes the first seal portion 4. In the case of square wrapping, the use of the seal block 2 can eliminate the disadvantage that conventional sealed wrapping is difficult to obtain.

  Further, the other side portion 12 of the sheet packaging body 10 is in a pillow packaging state, and has an advantage that a sealed packaging can be obtained by the second seal portion 6. That is, since it is necessary to pull out the seal block 2 used for the heat seal of the one side portion 11 after the seal of the one side portion 11, the seal block 2 is used for the other side portion 12 in the same manner as the one side portion 11. Square fold packaging is not possible by heat sealing. Therefore, in the other side part 12, the sealed packaging by the 2nd seal | sticker part 6 can be obtained by applying the method of pillow packaging. Moreover, since the 1st seal | sticker part 4 is unsealed and the 2nd seal | sticker part 6 is not opened when opening, the fault that a package is damaged at the time of opening of pillow packaging can also be eliminated. As described above, according to the sheet package 10, a new packaging form having both advantages of the square folded packaging and the pillow packaging is provided.

  As shown in FIGS. 6B and 6C, the sheet package 10 can be placed in an upright state. When the standing sheet packaging body 10 is viewed from the front side, the visible end portion is the other side portion 12 that is pillow-wrapped, and the one side portion 11 is hidden. In this state, only the second seal portion 6 is present on the front side, and all the first seal portions 4 are on the back side, so that the appearance of the sheet package 10 is improved. Since the sheet package 10 is placed in an upright state with the end surface having the smallest area facing down, the space occupied by the sheet package 10 in the installation space such as a shelf becomes small. Accordingly, a large number of the sheet packaging bodies 10 can be arranged in an orderly manner as densely as possible without slipping over, so that a good display form can be obtained.

  FIG. 7 is a diagram illustrating a state where the sheet package 10 is opened. FIG. 7A shows the start of opening. By leaving the folded apex portion 1d of the packaging sheet 1 as the non-sealed portion 13, the non-sealed portion 13 can be picked and the apex portion 1d can be peeled off by the heat seal 4a. FIG. 7B shows a state in which the apex portion 1d has been peeled off. By opening the gusset, the product W can be pulled out as shown in FIG. The packaging sheet after the product W is drawn is shown in FIG. It is easy to open the square bottom cylindrical body 3 from the side of the corner folded state, and the product W is taken out without opening the second seal portion 6.

It is a perspective view which shows an example of the preparation process of the sheet packaging method by this invention. It is a perspective view which shows an example of the folding and 1st sealing process performed after the preparatory process in the sheet packaging method by this invention. It is a perspective view which shows an example of the square bottom cylindrical body by which the seal block was extracted by the seal block extraction process performed after the folding and the 1st sealing process in the sheet | seat packaging method by this invention. It is a perspective view which shows an example of the package loading process performed after the seal block extraction process in the sheet | seat packaging method by this invention. It is a perspective view which shows an example of the 2nd sealing process of sealing the opening part of the square bottom cylindrical body performed after the package loading process in the sheet | seat packaging method by this invention. It is a perspective view which shows an example of the sheet packaging body by this invention. It is a perspective view which shows the mode of opening of the sheet packaging body shown in FIG. It is a figure which shows an example of the packaging process by the conventional square folding packaging. It is a figure which shows an example of the packaging process by the conventional horizontal pillow packaging. It is a figure which shows the mode of opening of a pillow package.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Packaging sheet 1a Vertex 1b Bottom 1c Corner 1d Vertex corner 1e Side portion 2 Seal block 2a Trunk circumference 2b End surface 3 Square bottom cylindrical body 4 First seal 4a Heat seal 4b Heat seal 5 Open 6 2 Seal part 7 (7a, 7b, 7c) Heat seal block 8 Heat seal bar 10 Sheet package 11 One end 12 The other end W Product

Claims (9)

  A preparatory step for placing the seal block at the center on the isosceles triangle-shaped packaging sheet and closer to the bottom, both side portions and the apex portion of the packaging sheet left around the seal block are Folding / first sealing step of folding along the peripheral surface and the end surface and sealing the overlapping region of the side portions and the apex portion with the seal block as a backing to form a square bottom cylindrical body, the seal A seal block pulling step for pulling out the block from the square bottom tubular body, a package loading step for loading a package into the square bottom tubular body from which the seal block has been pulled out, and an opening of the square bottom tubular body. A sheet packaging method comprising a second sealing step for sealing.   The sheet packaging method according to claim 1, wherein, in the preparation step, both corner portions other than the apex angle of the packaging sheet are truncated or folded.   3. The sheet packaging method according to claim 1, wherein, in the folding / first sealing step, the apex angle portion is folded after folding both side portions of the packaging sheet in a manner of being wound around the seal block. .   The said 2nd sealing process consists of end-sealing the said opening part in the state which folded the gusset from the both sides of the said opening part of the said square bottom cylindrical body. Sheet packaging method.   The sheet packaging method according to claim 1, wherein the sealing in the folding / first sealing step and the second sealing step is a heat sealing step.   The packaging sheet is formed by folding the both side portions and the top corner portion of the packaging sheet that has been truncated or folded at both corners other than the top corner of the isosceles triangle, and has an overlapping region between the both side portions and the top corner portion. Sealed as a first seal part to form a square bottom cylindrical body, containing a package in the square bottom cylindrical body, and sealing the opening of the square bottom cylindrical body with a second seal part A sheet package comprising:   The sheet packaging body according to claim 6, wherein the apex angle portion is folded on the both side portions of the packaging sheet that are folded.   The sheet package according to claim 6 or 7, wherein gussets are formed on both sides of the opening of the square bottom cylindrical body. The sheet packaging body according to any one of claims 6 to 8, wherein the first seal portion and the second seal portion are heat seal portions as hermetic seal portions.

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