JP2018095267A - Container made of sheet material and manufacturing method of container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-supporting container made of a sheet material excellent in heat retention which can provide easily its cells with fluid and its manufacturing method.SOLUTION: A container 33 is made by adhering parts of a sheet material 37 each other. It consists of sealed parts 28 which are made by sealing margins of the first film 2, body parts 16, bottom parts 13 and 40, a number of side wall cells 17 arranged on the body parts 16, bottom passages 39 formed on bottom parts 13 and 40, a number of body passages 12B communicating with side wall cells 17 and a pouring part 16 which communicates with the side wall cells 17 and the bottom passage 39 at least on one side of the container. When fluid is poured in from the pouring part 17, the fluid is supplied to the side wall cells 17 on the body parts 16 and the bottom passage 39.SELECTED DRAWING: Figure 22

Description

  The present invention relates to a container made of a sheet material, and particularly to a container having self-supporting property and a method for manufacturing the container.

  As an example of a self-supporting container, Patent Document 1 describes a plastic bottle configured in a double cylindrical shape. The plastic bottle includes an inner shell and an outer shell, and the inner shell and the outer shell in the trunk portion are connected to each other through a plurality of connecting portions, and a plurality of pieces communicated with each other between the inner shell and the outer shell. A cavity is formed. In addition, an inlet is formed in the outer shell of the trunk, and air is injected into the cavity from the inlet. At the bottom, the inner shell is connected along the inner peripheral edge of the outer shell constituting the bottom, and the space formed between the outer shell and the inner shell at the bottom is relative to the cavity at the trunk. be independent.

  The self-supporting bag described in Patent Document 2 is formed by stacking two sheets, and the contents in the seal portions on three sides of the bottom portion of the self-supporting bag and the side portions on both sides across the bottom portion An independent air chamber is formed with respect to the housing portion. The independent air chambers formed on both sides and the bottom are in communication with each other, and each independent air chamber is filled with air.

  The self-supporting packaging bag described in Patent Document 3 is formed by stacking two sheets, and is independent from each other in the bottom seal portion of the self-supporting packaging bag, and functions as a so-called air cushion. An air enclosure is formed.

  The packaging bag described in Patent Document 4 includes a cylinder made of a sheet in which a large number of independent bubbles are formed between heat-shrinkable films, and a bottom material made of the sheet. The lower end portion is bent inward of the cylindrical body, and the above-described bottom material is bonded to the bent lower end portion.

Japanese Patent Laid-Open No. 11-342949 JP 2006-27697 A Japanese Patent Laying-Open No. 2015-20755 Japanese Utility Model Publication No. 61-44986

  In the configuration described in Patent Document 1, when air is supplied from the injection port to the barrel portion, the cavities are in communication with each other. Therefore, the air flows in the circumferential direction or the axial direction of the barrel portion so that each cavity portion To be supplied. Since the space formed in the bottom is independent of each cavity formed in the body, air can be supplied to the space formed in the bottom depending on the air filling operation to the cavity described above. Can not. Therefore, in order to fill the space formed in the bottom part with air, an operation different from the air filling operation for the cavity part is performed. There was still room for improvement in order to fill each of the hollow portions formed in the trunk portion and the space formed in the bottom portion with air.

  In the configuration described in Patent Document 2, when the independent air chambers formed on both sides and the bottom are filled with air, the shape of the independent air chamber is maintained by the internal pressure of the independent air chamber. It is possible to improve the rigidity and self-supporting property. However, the contents stored in the container are various, and there are cases where heat insulation and heat retention are required. On both sides and the bottom where the independent air chambers are formed, heat insulation and heat retention are improved due to a small amount of heat transferred through the air. On the other hand, since there is no independent air chamber on the side of the container, there is a possibility of heat transfer between the contents and the outside through the side of the container, and there is room for improvement in this respect. The

  In the configuration described in Patent Document 3, a plurality of air enclosing portions are formed in the seal portion constituting the bottom portion. That is, when two sheets are stacked and bonded together to form the bottom, a plurality of air chamber enclosures independent from each other are formed. Therefore, when each air enclosure part is filled with air, the air enclosure part is filled with air, which may necessitate complicated operations. In addition, because the amount of heat transferred through the air is small at the bottom where the air enclosure is formed, heat insulation and heat retention are good, but no air chamber is provided on the side of the packaging bag, Heat transfer may occur between the contents and the outside through the side surface, and there is still room for improvement in this respect.

  On the other hand, in the configuration described in Patent Document 4, a large number of bubbles are formed on the outer peripheral surface of the cylinder and the outer surface of the bottom material. Thermal insulation is improved. However, since each bubble in the sheet described in Patent Document 4 is independent from each other, there is a possibility that complicated work may be required when each bubble is filled with air.

  The present invention has been made paying attention to the above technical problem, and has a self-supporting property, and can easily supply a fluid to each cell, and also has excellent heat retaining properties. It is an object of the present invention to provide a container comprising the above and a method for producing the container.

  In order to achieve the above object, the present invention is configured by adhering a container sheet material including at least two films of a first film constituting an inner surface and a second film constituting an outer surface to each other. In the container, a seal portion in which peripheral portions of the first film in the container sheet material arranged to face each other are bonded to each other; and the container sheet material arranged to face the seal portion. A body portion configured by the following: a bottom portion that is continuous with the body portion and is folded inwardly on the body portion; and the first film and the second film in the body portion are lined A plurality of side wall cells that are bonded and partitioned in a shape and expand when supplied with a fluid; and the first film and the second film at the bottom are bonded and partitioned; A bottom channel that communicates with the plurality of side wall cells in the recording body portion and the plurality of side wall cells in the other body portion and through which the fluid flows, and a portion of the body portion that are linearly bonded to each other. The plurality of body portion communication portions communicating with the side wall cells adjacent to each other and at least one of the plurality of side wall cells formed on the one body portion and the bottom channel and the fluid is injected. The plurality of side wall cells in the one body part, the bottom channel, and the plurality of side wall cells in the other body part by injecting the fluid into the injection part. The fluid is supplied.

  In the present invention, the bottom flow path includes a plurality of bottom cells defined by a plurality of adhesive portions in which the first film and the second film in the bottom portion are linearly bonded, and the plurality of adhesive portions. Among them, the bottom cells on both sides and the width direction of the bottom portion are extended in parallel through the bonding portion extending in parallel with the width direction of the bottom portion and sandwiching the bonding portion extending in parallel with the width direction of the bottom portion. You may be comprised by the several bottom part communication part which connects the said bottom cell and the said side wall cell of both sides on both sides of the said adhesion part.

  In the present invention, at least three of the bottom cells constitute legs and are formed on the bottom, and one of the at least three bottom cells deviates from a straight line passing through the other two bottom cells. It may be provided at a different position.

  In the present invention, the at least three bottom cells may be formed between both end portions of the bottom portion and a central portion of the bottom portion in the width direction of the bottom portion.

  In the present invention, at least one of the plurality of adhesive portions extending in parallel with the width direction of the bottom portion is a fold of the bottom portion arranged in a mountain-folded state inside the trunk portion. Good.

  In this invention, the said injection | pouring part may be penetrated in the thickness direction of the said 2nd film, and may be connected to one side wall cell among the said some side wall cells in said one trunk | drum.

  The container manufacturing method according to the present invention is a container manufacturing method in which a container sheet material including at least two films of a first film constituting an inner surface and a second film constituting an outer surface is bonded to each other. The first film forming an injection part penetrating in the thickness direction of the second film, and the second film and the first film in which the injection part is formed in the first process. And the peripheral portions thereof are adhered to each other, and the first region and the second film in the first region are bonded and partitioned in the first region which becomes the bottom of the container. Forming a bottom flow path through which a fluid flows, and communicating with the injection section and the bottom flow path in a second area on both sides of the first area and serving as a body of the container; 2 areas A second step of linearly bonding the first film and the second film and forming a plurality of side wall cells that are expanded by being supplied with the fluid; and the bottom channel in the second step While facing the first film in the container sheet material formed with the side wall cells, the second regions are arranged to face each other, and in a state of being mountain-folded between them A third step of arranging the first region and further bonding the peripheral portions of the first film in the container sheet material stacked on each other, and the peripheral portions of the first film in the third step After bonding, by injecting the fluid from the injection portion, the plurality of side wall cells in one of the second regions through the bottom channel and the other region in the second region. A method for producing a container which is characterized in that it comprises a fourth step of supplying the fluid to the number of side wall cells.

  According to this invention, the container sheet material includes at least two films of a first film located inside when the container is configured and a second film located outside the container. The first films are arranged to face each other, and their peripheral portions are bonded to each other to form a body portion of the container. A portion where the peripheral portions are bonded together is a seal portion. The bottom portion of the container is disposed in a state where it is folded inwardly on the inside of the trunk portion, and a plurality of side wall cells are formed on each of the trunk portions on both sides of the bottom portion. A bottom channel is formed at the bottom. A plurality of side wall cells of each body part on both sides of the bottom part are communicated via the bottom channel. Adjacent side wall cells are in communication with each other via a trunk communication portion. In addition, an injection part is formed in communication with at least one of the plurality of side wall cells and the bottom channel in the one body part, and fluid is injected from the injection part. Therefore, when fluid is injected into the injection part, the fluid is supplied to the plurality of side wall cells and the bottom channel in one body part and the plurality of side wall cells in the other body part. When the bottom portion is placed on a placement surface such as a table, the boundary portion between the bottom portion and the trunk portion or the portion where the bottom flow path is not formed in the bottom portion comes into contact with the placement surface. Such a container can be made stable and independent. In addition, since fluid is injected into each side wall cell of the container, heat outside the container is transferred to the contents through the fluid, resulting in increased thermal resistance and excellent heat retention. It can be.

It is the perspective view which fractured | ruptured partially in each film which comprises the sheet | seat material for containers in this invention. It is an expanded view of an example of the sheet material for containers which comprises the container which concerns on this invention. It is a figure which shows typically an example of the bonding apparatus of a 1st film and a 2nd film. It is a block diagram which shows collectively the manufacturing process of the container sheet material, and the manufacturing process of the container using the container sheet material. It is a figure which shows the 2nd film in which the through-hole was formed. It is a figure which shows an example of the heat seal pattern formed with block B4. It is a figure which shows the 1st raw material sheet in which the notch part was formed. It is a figure which shows the state which folded the 2nd material sheet | seat. It is a figure which shows an example of the seal pattern formed by block B7. It is a figure which shows typically the location which forms a side seal part. It is a typical perspective view for demonstrating adhesion | attachment of pleats. It is a figure which shows typically the location which performs a point seal. It is a figure which shows the state which cut out the raw container from the 2nd raw material sheet | seat on the side seal part as a boundary. It is a figure which shows typically an example of the container in this invention with which the spout was attached. It is a figure which shows typically an example of the container in this invention with which the content was filled and the cap was attached. It is sectional drawing which expanded partially which shows the state which injects a fluid from a through-hole typically. It is a figure which shows typically the path | route through which the fluid in each side wall cell and each bottom cell in an example of the sheet | seat material for containers concerning this invention flows. It is a figure which shows typically the location which plugs up another release cell. It is a figure which shows typically an example of the container with which each cell was sealed after inject | pouring the fluid. It is a top view which shows typically the bottom part of the container comprised using the sheet | seat material for containers shown in FIG. It is a side view which shows typically the bottom part of the container comprised using the sheet | seat material for containers shown in FIG. It is an expanded view of the other example of the sheet | seat material for containers which comprises the container which concerns on this invention. It is a figure which shows typically the path | route through which the fluid in the sheet | seat material for containers shown in FIG. 22 flows. It is a top view which shows typically the bottom part of the container comprised using the sheet material for containers shown in FIG. It is a side view which shows typically the bottom part of the container comprised using the sheet material for containers shown in FIG.

(First embodiment)
FIG. 1 is a partially broken perspective view of each film constituting the container sheet material of the present invention. The container sheet material 1 is configured by adhering a first film 2 positioned inside a container and a second film 3 positioned outside the container when the container is configured. The first film 2 is, for example, an adhesive layer 4 that is thermally bonded to the second film 3, a barrier layer 5 that is configured to suppress gas permeation, and an innermost container that is disposed inside the container. It is comprised by the laminated | multilayer film which laminated | stacked the inner layer 6 to touch. The adhesive layer 4 is preferably composed of a resin film having heat sealability. As the adhesive layer 4, for example, a resin film such as a polyolefin resin or a polyester resin can be used. Among these, it is particularly preferable to use a film made of a linear low density polyethylene resin (hereinafter referred to as LLDPE).

  The barrier layer 5 suppresses, for example, permeation of oxygen, water vapor, aromatic substances, and the like, and is constituted by a resin film or coating film having an oxygen barrier property that is smaller than that of other gases. . When the barrier layer 5 is formed of a coating film, a coating mainly composed of a synthetic resin material that hardly transmits oxygen or water vapor is applied to the adhesive layer 4 or the inner layer 6 and then dried. Examples of the resin film and the synthetic resin material constituting the barrier layer 5 include an ethylene / vinyl alcohol copolymer. As the inner layer 6, like the adhesive layer 4, it is preferable to use a resin film having heat sealing properties such as polyolefin resin and polyester resin, and it is particularly preferable to use a film made of LLDPE.

  The 2nd film 3 is comprised by laminating | stacking the base material layer 7 which is a base, and the outer layer 8 arrange | positioned at the outermost side of a container. The base material layer 7 is, for example, thermally bonded to the first film 2 and is configured by a resin film having heat sealability. As the base material layer 7, a resin film such as a polyolefin-based resin or a polyester-based resin can be used similarly to the adhesive layer 4, and it is particularly preferable to use a film made of LLDPE. If a film made of LLDPE is used, the base material layer 7 and the adhesive layer 4 can be easily thermally bonded to each other, and the base material layer 7 and the adhesive layer 4 can be compared with the case where other films are used. The adhesive strength between the two can be improved. As the outer layer 8, for example, a resin film such as a polyamide resin, a polyolefin resin, or a polyester resin is preferably used, and a nylon (registered trademark) resin film is particularly preferably used.

  FIG. 2 is a developed view of an example of a container sheet material constituting the container according to the present invention. In FIG. 2, the arrow H direction indicates the height direction of the container configured using the container sheet material according to the present invention, and the arrow W1 direction indicates the width direction of the container. The container sheet 1 shown in FIG. 2 has a rectangular shape, and the first film 2 and the second film 3 are thermally bonded to each other at four sides. This thermally bonded portion is the edge portion 9. In the following description, the edge portions 9 on both sides of the container sheet material 1 in the width direction W1 of the edge portions 9 are referred to as side edge portions 9A, and the edge portions 9 on both sides of the container sheet material 1 in the height direction H are referred to as side edge portions 9A. This is referred to as a top edge portion 9B. In the portion surrounded by the edge portion 9, the first film 2 and the second film 3 are thermally bonded to each other, a plurality of linear vertical seal portions 10 extending in the height direction H, and the width direction W1 A plurality of linear transverse seal portions 11 are formed. The vertical seal portions 10 are formed at regular intervals in the width direction W1 and intermittently in the height direction H, and a gap is formed between the vertical seal portions 10 adjacent to each other. The lateral seal portions 11 are formed in the height direction H at predetermined intervals and intermittently in the width direction W1, and a gap is formed between the lateral seal portions 11 adjacent to each other. In other words, each gap is formed through each of the seal portions 10 and 11, and serves as a communication portion 12 that communicates the space formed between the first film 2 and the second film 3.

  As shown in FIG. 2, the portion surrounded by the edge portion 9 is partitioned in a lattice shape by the vertical seal portion 10 and the horizontal seal portion 11, and among the portions surrounded by the edge portion 9, the height direction H The central part of the container sheet material 1 is a first region 13 constituting the bottom of the container. In the first region 13, the vertical seal portion 10 is formed continuously in the height direction H, and the horizontal seal portion 11 is formed intermittently in the width direction W1. In the example shown here, the horizontal seal portion 11 is formed in three rows. In the following description, the first horizontal seal portion 11A, the second horizontal seal portion 11B, and the third horizontal seal portion 11C are referred to in order from the top in FIG. In the height direction H, the widths of the horizontal seal portions 11A, 11B, and 11C are set wider than the width of the horizontal seal portion 11 in other regions. A plurality of sealed cells 14 whose four sides are closed by a vertical seal portion 10 and a horizontal seal portion 11 are formed at the center and both ends of the first region 13 in the width direction W1. Specifically, two chambers are formed adjacent to each side edge portion 9A and arranged in the height direction H, and two chambers are arranged in the center portion in the width direction W1 and arranged in the height direction H. Six chambers are formed. Between the closed cell 14 at both ends of the first region 13 in the width direction W1 and the closed cell 14 at the center, two chambers are arranged in the height direction H, and the first film 2 is connected to the first film 2 via the communication portion 12. A total of four open cells in which the space between the second film 3 and the second film 3 communicated with each other are formed. That is, the release cell is formed in the width direction W1 so as to avoid both end portions and the center portion of the first region 13. These release cells are referred to as bottom cells 15 in the following description. Further, the communication portion 12 formed in the first region 13 is referred to as a bottom communication portion 12A. In addition, the some vertical seal | sticker part 10 and the some horizontal seal | sticker part 11 in the 1st area | region 13 correspond to the adhesion part in this invention.

  In the height direction H, both sides of the first region 13 are second regions 16 constituting the body of the container. The vertical seal portion 10 in the second region 16 is intermittently formed with a predetermined length in the height direction H. In the example shown here, the vertical seal portion 10 is formed long on the first region 13 side and short on the opposite side to the first region 13. The lateral seal portion 11 is intermittently formed with a predetermined length in the width direction W1. As shown in FIG. 2, a plurality of release cells that are rectangular with the height direction H as a long side and communicated with each other via the communication portion 12 are formed on the first region 13 side in the second region 16. ing. A release cell having a length in the height direction H shorter than that of the rectangular release cell is formed on the opposite side of the first region 13 across the rectangular release cells. In the following description, the plurality of release cells formed in these second regions 16 are referred to as side wall cells 17. Further, the rectangular side wall cell 17 is referred to as a side wall cell 17L, and the side wall cell 17 whose length in the height direction H is shorter than the side wall cell 17L is referred to as a side wall cell 17S. The side wall cells 17L and 17S are in communication with each other via the communication portion 12, and the communication portion 12 formed in the second region 16 is referred to as a trunk portion communication portion 12B in the following description.

  Both sides of the second region 16 in the height direction H are third regions 18 to which a spout (not shown) in the container is attached. In the third region 18, the vertical seal portion 10 is formed continuously from the top edge portion 9B by a predetermined length. The lateral seal portion 11 extends in the width direction W1 from one side edge portion 9A toward the other side edge portion 9A, and a sealed cell 14 whose four sides are closed by the longitudinal seal portion 10 and the lateral seal portion 11 is formed. A total of 5 chambers are formed. Of the five sealed cells, four chambers are formed to have substantially the same size, and one chamber is formed to be longer than the other sealed cells. Between the elongated sealed cell and the other side edge portion 9A, another elongated release cell 19 extending in the height direction H is formed. The other release cell 19 is formed in the vicinity of the corner 1A among the four corners 1A, 1B, 1C, and 1D of the container sheet 1, and communicates with the side wall cells 17S adjacent to each other. . A through-hole 20 that penetrates in the thickness direction is formed in the second film 3 in the other release cell 19. Fluid is injected into the other release cell 19 from the through hole 20. This through hole 20 corresponds to the injection portion in the present invention. The shape of the through hole 20 may be any shape such as a circle, a rectangle, a square, or a triangle. In the other third region 18, the vertical seal portion 10 is continuously formed for a predetermined length from the top edge portion 9 </ b> B. The lateral seal portion 11 is continuously formed between the side edge portions 9A. Therefore, in the other third region 18, a total of five closed cells 14 having substantially the same size and having four sides closed by the vertical seal portion 10 and the horizontal seal portion 11 are formed. In addition, water, air, etc. are mentioned as the fluid mentioned above.

  Next, the manufacturing method of the container sheet material 1 and the manufacturing method of the container using the container sheet material 1 will be described together. FIG. 3 is a diagram schematically showing a bonding apparatus for bonding the first film 2 and the second film 3, and FIG. 4 is a manufacturing process of the container sheet material 1 and a container manufacturing process using the container sheet material 1. FIG. As shown in FIG. 3, a first material roll 21 around which the first film 2 is wound and a second material roll 22 around which the second film 3 is wound are prepared. First, from the second material roll 22 to the second film 3. (Block B1). The through hole 20 is formed in the second film 3 fed out from the second material roll 22 (block B2). FIG. 5 is a diagram showing the second film 3 in which the through holes 20 are formed. In FIG. 5, the arrow W2 direction indicates the width direction of the second film 3 and corresponds to the height direction H of the container sheet material 1. The through-hole 20 is formed in the width direction W2 shown in FIG. 5 in the one end part side in the 2nd film 3, ie, the location corresponding to the corner | angular part 1A of the sheet | seat material 1 for containers. This can be performed by a punching machine (not shown). Note that the step of forming the through hole 20 described in the block B1 corresponds to the first step in the present invention.

  Separately from this, the first film 2 is fed out from the first material roll 21 and superposed on the second film 3 in which the through holes 20 are formed (block B3). For example, the base material layer 7 of the second film 3 is superposed on the adhesive layer 4 of the first film 2. In that state, a heat seal pattern is formed in a lattice shape, and the first film 2 and the second film 3 are bonded together (block B4). FIG. 6 is a diagram illustrating an example of a heat seal pattern formed in the block B4. In the example shown in FIG. 6, the heat seal pattern for two sheets of the container sheet material 1 is formed by one operation. This can be done using a conventionally known adhesive device such as a heat sealer. Specifically, for example, a “mold” on which the heat seal pattern shown in FIG. 6 is formed is prepared, and the “mold” is pressed against each of the superimposed films 2 and 3 and heated. Alternatively, a pre-heated “mold” is pressed. Thereafter, the “mold” is separated from the films 2 and 3 to cool the films 2 and 3. Thus, the first material sheet 23 in which the first film 2 and the second film 3 are bonded is formed. The first material sheet 23 is wound up to be a raw fabric 24. Each process described in block B3 and block B4 corresponds to the second process in the present invention.

  The original fabric 24 is set in a bag making machine (not shown). The first material sheet 23 is fed out from the original fabric 24, and a plurality of notches 25 are formed in the first material sheet 23 (block B5). FIG. 7 is a view showing the first material sheet 23 in which the notch 25 is formed. As shown in FIG. 7, the cutout portions 25 are so-called blank portions between the heat seal patterns of the container sheet material 1, and are respectively in positions that are line symmetric with respect to the second horizontal seal portion 11 </ b> B as an axis of symmetry. It is formed. Therefore, as described later, when the container sheet material 1 is folded, the cutout portions 25 are overlapped with each other, and the inner layers 6 of the second film 3 are exposed from the cutout portions 25.

  Next, the first material sheet 23 in which the cutout portion 25 is formed is cut out collectively for three sheets of the container sheet material 1 to be the second material sheet 26, and corresponds to the first region 13 in the second material sheet 26. The part is folded (block B6). FIG. 8 is a view showing a state in which the second material sheet 26 is folded. As shown in FIG. 8, the first horizontal seal portion 11A and the third horizontal seal portion 11C, which are the boundary portions between the first region 13 and the second region 16, are creased, and the second material sheet 26 is fold-folded. . At this time, the inner layers 6 in the second film 3 face each other. Between the folds, that is, the second material sheet 26 is valley-folded so that the second horizontal seal portion 11B is disposed inside the container. Thus, the first region 13 is disposed between the second regions 16 in a state of being folded in a mountain. Accordingly, a total of four second material sheets 26 overlap at the lower end of the container in the height direction H, and the inner layers 6 and the outer layers 8 are overlapped with each other. Further, the cutout portions 25 overlap each other.

  As described above, the four overlapping portions of the second material sheets 26 are bonded obliquely (block B7). FIG. 9 is a diagram showing a seal pattern formed by the block B7. As shown in FIG. 9, the second material sheet 26 has a trapezoidal shape with the notch 25 positioned at the center in the height direction and the first horizontal seal portion 11 </ b> A and the third horizontal seal portion 11 </ b> C as the lower sides. Heat sealed along the hypotenuse. In addition, the trapezoid mentioned above is described as a hatched area in FIG. This obliquely sealed portion is referred to as an oblique seal portion 27 in the following description. In the oblique seal portion 27, the inner layers 6 facing each other are bonded together with the first horizontal seal portion 11A and the third horizontal seal portion 11C as folds. As a result, triangular pleats are formed on both sides of the lower end portion in the height direction H of the container. The oblique seal portion 27 restricts the spread of the bottom of the container when the contents are filled as will be described later.

  Next, both end portions of the second material sheet 26 folded as described above are sealed in a band shape to form the side seal portion 28 (block B8). FIG. 10 is a diagram schematically showing a portion where the side seal portion 28 is formed, and the portion where the side seal portion 28 is formed is described as a hatched region in FIG. 10. As shown in FIG. 10, the side seal portion 28 is formed by bonding so-called blank portions between the heat seal patterns described above. Thereby, the inner layers 6 facing each other are bonded together. Further, the inner layers 6 that appear by forming the notch portions 25 are bonded to each other, whereby the above-described folds are bonded to each other. The above-described side seal portion 28 corresponds to the seal portion in the present invention.

  Here, the adhesion between the pleats described above will be described. FIG. 11 is a schematic perspective view for explaining adhesion between pleats. In FIG. 11, for convenience of explanation, a state where the pleats are separated from each other is schematically shown. As described above, when the oblique seal portion 27 is formed, the inner layers 6 facing each other are bonded to each other, and a pair of pleats 29 are formed as shown in FIG. Since the cutout portions 25 are formed on both sides of the first region 13 which is the bottom portion, the inner layer 6 of the second region corresponding to the cutout portion 25 is exposed from the cutout portion 25. When the side seal portion 28 is formed, the inner layers 6 in the second region are bonded to each other, and as a result, the pair of pleats 29 are bonded to each other. Each process described in block B6 to block 8 corresponds to the third process in the present invention.

  Next, point sealing is performed (block B9). FIG. 12 is a diagram schematically illustrating a place where point sealing is performed. Locations where point sealing is performed are shown in FIG. 12 as hatched regions. As shown in FIG. 12, the point seal point is the upper end portion of the portion where the four second material sheets 26 overlap, that is, the intersection of the oblique seal portion 27 and the side seal portion 28. By performing point sealing, the four second material sheets 26 are bonded without gaps. Thereafter, as shown in FIG. 13 with the side seal portion 28 as a boundary, one piece is cut out (block B10), and an element container 30 having an opening on the third region 18 side is formed.

  The raw container 30 is set in a spout welding machine (not shown), and the spout 31 is attached to the opening of the raw container 30 as shown in FIG. 14 (block B11). For example, in a state where the spout 31 is sandwiched by an opening (not shown) of the third region 18, they are pressed and heated to be bonded. At the same time, the inner layer 6 in the opening is thermally bonded to close the opening. In this way, the accommodating part 32 is formed and becomes the container 33 in this invention. In FIG. 14, the oblique seal portion 27 and the fold 29 are omitted for the sake of simplicity.

  Then, the container 33 is set in a filling machine (not shown), and the contents are filled from the spout 31 into the accommodating portion 32 (block B12). The contents are preferably fluid, such as liquid or slurry solid. After filling the contents, the cap 34 is attached to the spout 31 and sealed (block B13). FIG. 15 shows a container 33 filled with contents and fitted with a cap 34. Next, fluid is injected from the through hole 20 (block B14). FIG. 16 is a partially enlarged cross-sectional view schematically showing a state in which a fluid is injected from the through hole 20. As shown in FIG. 16, the nozzle 35 having an outer diameter larger than the hole diameter of the through hole 20 is pressed so as to cover the through hole 20 to inject the fluid into the other release cell 19. The step of injecting the fluid described in block B13 corresponds to the fourth step in the present invention.

  Here, the flow path of the fluid will be described. FIG. 17 is a diagram schematically showing a path through which fluid flows in each side wall cell 17 and each bottom cell 15 in the container sheet material 1 according to the present invention. The arrows in FIG. 17 indicate the flow path and direction of the fluid. When the fluid is injected from the through hole 20, the fluid expands the other release cell 19 by expanding the first film 2 and the second film 3 in the other release cell 19 by its own pressure. Further, it flows in the other release cell 19 and reaches the side wall cell 17S in one second region 16 that is in direct communication with the other release cell 19. The fluids that have reached the side wall cell 17S are adjacent to each other and reach the plurality of side wall cells 17S via the trunk portion communication portion 12B. Further, the plurality of side wall cells 17S reach the side wall cell 17L on the first region 13 side via the trunk portion communication portion 12B. In this way, fluid is supplied over the entire side wall cells 17 in one second region 16, and each side wall cell 17 expands. The fluid reaching the side wall cell 17L is supplied to each bottom cell 15 in the first region 13 through the bottom communication portion 12A. The fluid that has reached the bottom cell 15 in the first region 13 is adjacent to each other and reaches the side wall cell 17L in the other second region 16 through the bottom communication portion 12A, and further through the trunk portion communication portion 12B. 17S is reached. That is, each bottom cell 15 in the first region 13 functions as a flow path for supplying fluid from each sidewall cell 17 in one second region 16 to each sidewall cell 17 in the other second region 16.

  After sufficiently injecting the fluid, the other release cell 19 is closed (block B15). FIG. 18 is a diagram schematically illustrating a location where another release cell 19 is blocked. As shown in FIG. 18, for example, a heated bar or the like is pressed to the downstream side of the through hole 20 in the flow direction of the fluid in the other release cell 19, or the other release cell 19 is heated by a pair of heated bars. By sandwiching the downstream side of the through hole 20 in the fluid flow direction, the inner layers 6 are bonded and closed. The closed portions of other release cells 19 are shown as hatched regions in FIG. Thus, the cells 15 and 17 are sealed. FIG. 19 schematically shows a container 33 in which a fluid is injected into each of the cells 15 and 17 and each of the cells 15 and 17 is sealed.

  By the way, the above-described oblique seal portion 27 portion restricts the expansion of the bottom portion 36 that accompanies the filling of the contents, that is, in order to improve the rigidity of both end portions of the bottom portion 36, Difficult to deform compared to the center of the. As shown in FIG. 20, the bottom cell 15 is formed so as to avoid both end portions of the bottom portion 36. Therefore, the bottom cell 15 is easily deformed as compared with the case where the bottom cell 15 is provided at both end portions. Therefore, the bottom cell 15 is expanded by the pressure of the fluid, and the fluid is supplied from one second region 16 to the other second region 16 without stagnation. On the other hand, the center portion is not particularly processed except for the vertical seal portion 10 and the horizontal seal portion 11, and thus is easily deformed as compared with both end portions. In the present invention, as shown in FIGS. 20 and 21, the bottom cell 15 is formed between both end portions and the central portion, avoiding such a deformable central portion. That is, the sealed cell 14 is formed at the center of the bottom portion 36 in the width direction W1 of the container 33, and the bottom cells 15 are formed in two rows one by one between the sealed cell 14 and both ends of the bottom portion 36. Of the four bottom cells 15, two bottom cells 15 are located on a straight line connecting them, and the other two are off the straight line. Each bottom cell 15 is formed at substantially the same position from the center in the width direction W1. Thus, when fluid is injected, each bottom cell 15 expands substantially similarly. Of the expanded bottom cells 15, at least three bottom cells 15 come into contact with a mounting surface such as a table. Each bottom cell 15 inflated by injecting fluid constitutes a leg of the container 33. The leg portion bulges toward the outside of the container 33 from the first horizontal seal portion 11A and the third horizontal seal portion 11C, which are the boundary portion between the trunk portion and the bottom portion at the time of fluid injection, and contacts the placement surface. The container 33 can be made to stand on its own.

  Therefore, in the container 33 having the above-described configuration, each bottom cell 15 similarly expands and comes into contact with the mounting surface at at least three points. In addition, each bottom cell 15 having the above-described configuration serves as a fluid flow path between each sidewall cell 17 in one first region 13 and each sidewall cell 17 in the other first region 13. The cells 15 and 17 can be sufficiently supplied without stagnation of fluid. When air is injected as a fluid, the thermal conductivity of air is smaller than that of water, for example. Therefore, the amount of heat transferred through each of the cells 15 and 17 is smaller than when water is injected as a fluid. Thus, the container 33 having excellent heat retention can be obtained. Moreover, each cell 15 and 17 functions as an air cushion, and can protect the contents from, for example, shock caused by shaking or dropping during transportation.

(Second Embodiment)
FIG. 22 is a developed view of another example of the container sheet material constituting the container according to the present invention. In FIG. 22, the arrow H direction indicates the height direction of the container configured using the container sheet material of the present invention, and the arrow W1 direction indicates the width direction of the container. The container sheet material 37 is a sheet material formed by laminating the first film 2 and the second film 3 described above, and as shown in FIG. 22, the first sheet material 37 for containers in the width direction W1. A rectangular seal portion 38 in which the first film 2 and the second film 3 are thermally bonded to each other is formed at both end portions and the central portion in the region 13. Between the rectangular seal portions 38, an elongated gap corresponding to the above-described release cell is formed. In the example shown in FIG. 22, each gap extends in a direction parallel to the height direction H of the container. Each gap communicates with the side wall cell 17L in each second region 16 on both sides of the first region 13 in the height direction H. Therefore, each gap functions as a flow path for allowing fluid to flow between the side wall cells 17 </ b> L in each second region 16 on both sides of the first region 13. These gaps are referred to as bottom channel 39 in the following description. The width of the bottom channel 39 in the width direction W1 is set to be substantially the same as the width of the trunk portion communication portion 12B or narrower than the width of the trunk portion communication portion 12B. Therefore, the cross-sectional area of the bottom channel 39 is the same as the cross-sectional area of the trunk portion communication portion 12B or smaller than the cross-sectional area of the trunk portion communication portion 12B. The same components as those shown in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted. And the container is comprised like the sheet material 1 for containers in 1st Embodiment using the sheet material 37 for containers shown in FIG.

  Here, the path | route through which the fluid flows in the container sheet | seat material 37 shown in FIG. 22 is demonstrated. FIG. 23 is a diagram schematically illustrating a path through which the fluid flows in the container sheet material 37 illustrated in FIG. 22. The arrows in FIG. 22 indicate the flow path and direction of the fluid. As in the first embodiment, fluid is injected from the through hole 20 into the other release cell 19. The fluid flows through the other release cell 19 and reaches the side wall cell 17 </ b> S in one second region 16 that is in direct communication with the other release cell 19. The fluid that has reached the side wall cell 17S reaches the plurality of side wall cells 17S through the trunk portion communication portion 12B. Further, the plurality of side wall cells 17S reach the side wall cell 17L on the first region 13 side via the trunk portion communication portion 12B. Thus, the fluid is supplied over the entire side wall cells 17 in the one second region 16, and the side wall cells 17 in the one second region 16 are expanded. Further, the fluid that has reached the side wall cell 17L in one second region 16 flows through the bottom channel 39 and reaches the side wall cell 17L in the other second region 16. Although the bottom channel 39 is expanded by the pressure of the fluid, its width and cross-sectional area are set to be approximately the same width and cross-sectional area as the body communication part 12B. It does not swell greatly. The fluid that has reached the side wall cell 17L in the other second region 16 reaches the side wall cell 17S via the trunk portion communication portion 12B. Thus, the fluid is supplied over the entire side wall cells 17 in the other second region 16 and the side wall cells 17 in the other second region 16 expand.

  FIG. 24 is a plan view schematically showing the bottom 40 of the container configured using the container sheet material 37 shown in FIG. In FIG. 24, when the container of the second embodiment is folded, a mountain fold line at the bottom portion arranged in a mountain fold state inside the trunk is indicated by a dotted line. FIG. 25 is a side view schematically showing the bottom 40 of the container configured using the container sheet material 37 shown in FIG. At both ends of the bottom portion 40, an oblique seal portion 27 is formed, and a rectangular seal portion 38 is formed. The bottom channel 39 is deformed in the width direction W1 of the container between the center portion and both end portions, that is, both end portions that are not easily deformed due to the formation of the oblique seal portion 27 and the both end portions. It is formed to avoid the easy central part. Therefore, the bottom channel 39 is relatively easily expanded by the pressure of the fluid and excessive deformation is suppressed. As a result, the fluid flows through the bottom channel 39 without stagnation, and the fluid is supplied from one second region 16 to the other second region 16. Further, although the bottom channel 39 is inflated by injecting fluid, the width in the width direction W1 of the container is set to be substantially the same width as that of the body communication part 12B. The protrusion height from the rectangular seal portion 38 is low as shown in FIG. That is, the two bottom flow paths 39 are in line contact with a mounting surface such as a table. Therefore, the container having the above-described configuration can be made independent.

  When the container having the above-described configuration is placed on a placement surface such as a table, the bottom channel 39 is pressed against the placement surface by a load corresponding to the weight of the container itself or the weight of the contents. Since the bottom channel 39 communicates with each side wall cell 17, when the load is pressed against the mounting surface by the above-described load, the fluid inside the bottom channel 39 may be pushed out to the side wall cells 17 on both sides across the bottom channel 39. is there. In this case, the contact area between the bottom channel 39 and the mounting surface is increased. This also improves the independence. Further, when the bottom channel 39 is set to be as thin or small as possible, the first horizontal seal portion 11A and the third horizontal seal portion 11C function as the boundary between the body portion and the bottom portion and as the bottom edge. May be brought into contact with the mounting surface. Since the bottom edge described above is formed over the entire circumference of the bottom 40, the contact area with the mounting surface can be increased as much as possible. When the bottom channel 39 is set as thin or small as possible, the container having the above-described configuration may be self-supported by such a bottom edge.

  In addition, this invention is not limited to embodiment mentioned above, Comprising: Size, number, shape, etc. of the vertical seal part 10, the horizontal seal part 11, the bottom flow path 39, etc. which are formed in the sheet material 1 for containers are this invention. You may change suitably in the range which achieves the objective. For example, at least one bottom channel 39 may be formed on the center side of the bottom portion, avoiding both ends of the bottom portion in the above-described embodiments, which restricts the spread of the bottom portion. Further, the other release cells 19 are filled with fluid and function as flow paths, and therefore may be formed on both side surfaces of the body portion of the container 33. If the fluid is injected from each of the other release cells 19, the fluid can be injected into each of the cells 15 and 17 more quickly. Furthermore, instead of heat sealing, an adhesive may be used for bonding the first film 2 and the second film 3 together. The through-hole 20 may be formed in the bottom portions 36 and 40 such as the side wall cell 17 and the bottom channel 39. If the through-hole 20 is formed in the bottom cell 17 or the bottom channel 39, the through-hole 20 is not easily exposed to the user when the container is erected, so that the appearance as a product is improved, or the container The degree of freedom of design such as printing on the surface of the sheet can be improved.

  DESCRIPTION OF SYMBOLS 2 ... 1st film, 3 ... 2nd film, 12 ... Communication part, 12B ... trunk | drum communication part, 15 ... Bottom cell, 16 ... trunk | drum (2nd area | region), 17 ... Side wall cell, 20 ... Through-hole (injection | pouring) Part), 33 ... container, 37 ... sheet material for container, 39 ... bottom channel, 40 ... bottom part.

Claims (7)

In a container configured by adhering a sheet material for containers having at least two films of a first film constituting an inner surface and a second film constituting an outer surface,
A seal portion in which the peripheral portions of the first film in the container sheet material disposed to face each other are bonded to each other;
A body portion configured by the seal sheet and the container sheet material disposed to face each other;
A bottom portion arranged in a state of being continuous with the trunk portion and being mountain-folded inside the trunk portion;
A plurality of side wall cells that are partitioned by linearly bonding the first film and the second film in the body portion and expand when supplied with fluid;
The first film and the second film at the bottom are bonded and partitioned, and communicated with the plurality of side wall cells in one of the body parts and the plurality of side wall cells in the other body part. A bottom channel through which the fluid flows;
A plurality of trunk communicating portions that communicate with the side wall cells that are adjacent to each other through the linearly bonded portion of the trunk;
An injecting portion that communicates with at least one of the plurality of side wall cells and the bottom channel formed in the one body portion and into which the fluid is injected;
By injecting the fluid into the injection part, the fluid is supplied to the plurality of side wall cells in the one body part, the bottom channel, and the plurality of side wall cells in the other body part. Characteristic container. The container according to claim 1,
The bottom channel includes a plurality of bottom cells defined by a plurality of adhesive portions that linearly bond the first film and the second film at the bottom,
Among the plurality of adhesive portions, the bottom cells on both sides through the adhesive portion extending in parallel with the width direction of the bottom portion and sandwiching the adhesive portion extending in parallel with the width direction of the bottom portion, and the bottom portion A container comprising a plurality of bottom communication portions that communicate the bottom cell and the side wall cells on both sides across the adhesive portion extending in parallel with the width direction. The container according to claim 2,
The bottom cell constitutes a leg and is formed at least three on the bottom;
One of the at least three bottom cells is provided at a position deviating from a straight line passing through the other two bottom cells. The container according to claim 3,
The container, wherein the at least three bottom cells are formed between both end portions of the bottom portion and a central portion of the bottom portion in the width direction of the bottom portion. The container according to any one of claims 2 to 4,
At least one of the plurality of adhesive portions extending in parallel with the width direction of the bottom portion is a fold of the bottom portion arranged in a mountain-folded state inside the trunk portion. container. The container according to any one of claims 1 to 5,
The said injection | pouring part has penetrated in the thickness direction of the said 2nd film, and is connected to one side wall cell among the said some side wall cells in said one trunk | drum, The container characterized by the above-mentioned. In the manufacturing method of a container constituted by adhering to each other a sheet material for a container provided with at least two films of a first film constituting an inner surface and a second film constituting an outer surface,
A first step of forming an injection part penetrating in a thickness direction of the second film in the second film;
The second film on which the injection part is formed in the first step and the first film are overlapped to bond their peripheral parts to each other, and in the first region that becomes the bottom of the container, The first film and the second film in one region are bonded and partitioned and form a bottom flow path through which fluid flows, and serve as the body of the container on both sides of the first region. The second region communicates with the injection portion and the bottom channel, and the first film and the second film in the second region are linearly bonded to each other, and the fluid is supplied to expand the region. A second step of forming a plurality of side wall cells;
In the second step, the first film in the container sheet material in which the bottom channel and the side wall cells are formed face each other, the second regions are arranged to face each other, and those A third step of arranging the first region in a state of being folded in between, and further bonding the peripheral portions of the first film in the container sheet material stacked on each other;
After adhering the peripheral portions of the first film in the third step, by injecting the fluid from the injecting portion, the plurality of side wall cells in one of the second regions through the bottom channel. And a fourth step of supplying the fluid to the plurality of side wall cells in the other second region.

Images