JP2021155045A - Fluid filling type bag-shaped container - Google Patents

Abstract

To provide a container in which a plurality of cells filled with fluid are formed at least on a side surface portion and a buckling strength is given by the cells, and the container having an unconventional large buckling strength.SOLUTION: Provided is a fluid filling type bag-shaped container in which a pump type discharge apparatus 6 is provided on an upper edge portion 4 of sheet materials 2 attached to each other, and a plurality of columnar cells 8A extending at a lower side in a vertical direction of a surface side portion 9 from the upper edge portion 4 are formed at a position corresponding to a lower side of at least the pump type discharge apparatus 6 of the side surface portion 9. Each of the columnar cells 8A includes a lower end Eb matching a lower end portion of the side surface portion 9 with an upper end Eu of a side of the upper edge portion 4, and has a shape that extends continuously and linearly in the vertical direction of the side surface portion 9 because a joint portion does not cross between the upper end Eu and the lower end Eb.SELECTED DRAWING: Figure 1

Description

The present invention relates to a container formed in a bag shape by a sheet material, and particularly to a container in which strength is given by providing a plurality of cells filled with a fluid such as air and expanded.

Plastic containers and the like are often used as containers for various daily necessities, but recently, in order to reduce the burden on the environment, it has been attempted to reduce the container material as much as possible. As a part of this, attempts have been made to construct a container with a sheet or film made of synthetic resin or the like (hereinafter, these are collectively referred to as a sheet material). The contents of a bag-shaped container made of a sheet material do not leak unless it is broken, but since it has almost no rigidity, it is deformed in response to an external force.

Even in a bag-shaped container having almost no rigidity, a pump dispenser is attached in order to expand its use. An example thereof is described in Patent Document 1. The pump dispenser is configured to pressurize and discharge the content liquid with a piston by pushing down the nozzle portion at the upper end. Therefore, a buckling load is applied to the container to which the pump dispenser is attached due to pushing down the nozzle portion. However, the bag-shaped container itself made of a sheet material does not have sufficient rigidity to withstand the pushing force. Therefore, in the container described in Patent Document 1, the tube of the pump dispenser is lengthened and extended near the bottom surface of the container, and a contact body in contact with the bottom sheet is attached to the lower end portion of the tube. That is, the pushing force for discharging the contents is not received by the main body of the container, but is received by the tube and the abutting body.

Further, Patent Document 2 describes a configuration in which a pump dispenser is attached to an upper end portion of a film packaging bag via a spout. The spout is formed with a collar that engages with the top plate of a high-strength holder, and the collar is engaged with the top plate of the holder with the pump dispenser screwed into the spout. It has become like. Therefore, in the configuration described in Patent Document 2, since the load that pushes down the pump is received by the holder, the packaging body does not require the strength required for discharging the contents, and the packaging bag itself does not require the strength required for discharging the contents. , It is not necessary to have a special structure to increase the rigidity or strength.

Patent Document 3 describes a container made of a sheet material and having a strength sufficient to maintain an independent state. The container described in Patent Document 3 is provided with a plurality of cells capable of enclosing a fluid such as air between two stacked films on the side surface portion and the bottom surface portion, and the cells are filled with the fluid to inflate each cell. It is set to (tensioned state), and the pressure inside the cell and the tension of the sheet material that composes the cell oppose the external force so that it has the strength to maintain the desired shape.

These cells are formed by partitioning a double-layered film constituting a sheet material by linearly welded rectangular welded portions. A communication portion that communicates cells adjacent to each other is formed through the welding portion so that fluid such as air supplied from a predetermined supply port is sequentially sent from the cell on the supply port side.

Japanese Unexamined Patent Publication No. 2011-6137 JP-A-2015-42553 JP-A-2018-95267

In the configuration described in Patent Document 1, a pushing-down load (that is, a buckling load) is received by a tube of a pump dispenser, and a buckling load is not particularly applied to a bag-shaped main body made of a thermoplastic resin sheet. The part does not need to have a special structure. However, since the tube of the pump dispenser is originally intended to suck up the liquid in the container, if the tube has a structure capable of withstanding a buckling load, the pump dispenser needs to have a special structure. As a result, there may be inconveniences such as an increase in the number of parts, a need to prepare a new manufacturing process, and a high manufacturing cost.

Further, since the packaging bag described in Patent Document 2 is configured on the premise that a holder is used, there is a problem that it cannot be used or is difficult to use in a place without a holder, and a material for the holder. And manufacturing equipment will increase, and it is possible that the cost will increase in the end.

Further, since the cells in the configuration described in Patent Document 3 swell in both the inside and outside directions of the container, a plurality of cells are provided by dividing the side surface portion and the bottom surface portion vertically and horizontally, and each cell is formed small. As for the entire container, the amount (dimensions) of swelling on both the inner and outer sides is suppressed to secure the inner volume of the container. The plurality of cells are configured as a region in which two laminated films are linearly welded and partitioned. Therefore, a welded portion (or a joint portion), which is a thin portion not filled with a fluid such as air, exists between each cell in a linear and matrix shape, and the shape of the container is maintained in that portion. It has almost no strength or serves as a starting point for deformation due to an external force. In particular, so-called waist bending that bends at a linear joint (welded portion) extending in the width direction (lateral direction) of the container is likely to occur. As described above, even if the container described in Patent Document 3 has enough strength to maintain an independent state, it is not necessarily strong enough against a buckling load such as attaching a pump dispenser to push down a piston. No.

Further, in the above-mentioned conventional container, as a large number of cells are formed, linear welded portions that partition the cells are formed so as to intersect vertically and horizontally, and also penetrate a part of those welded portions. Then, the above-mentioned communication portion is formed. Basically, at least two communication portions are formed so as to communicate the cells adjacent to each other on the left, right, or top and bottom. In the configuration described in Patent Document 3, communication portions are formed at positions facing each other in the left-right direction or the up-down direction.

As described above, this communication portion is formed by penetrating the linear welding portion that divides the cell, and therefore is formed by being partitioned by a linearly continuous welding portion or the welding portion thereof. The continuous state of the cells is in a state of being cut off by the communication portion. Therefore, the communication portion acts to reduce the bending strength or buckling strength of the cell, or the bending strength or buckling strength of the side surface portion of the container. The principle is not always clear, but when a load is applied to the container, fluid such as air escapes from the cell with a large load to another cell through the communication part, and the reaction force due to the cell with a large load is small. Become. Alternatively, since the shape of the cell changes at the communication portion, it is conceivable that deformation is promoted or induced by the concentration of stress. As described above, in order to improve the buckling strength or bending strength of the container provided with the above cell, there is room for further improvement.

The present invention has been made by paying attention to the above technical problems, and is a container in which a plurality of cells filled with fluid are formed at least on the side surface portions, and the buckling strength is imparted by the cells. An object of the present invention is to provide a container having an unprecedentedly large buckling strength.

In the present invention, in order to achieve the above object, a sheet material obtained by laminating an inner surface film and an outer surface film is formed in a bag shape having a side surface portion and a bottom surface portion, and the side surface portion and the bottom surface portion are formed. Of these, at least the side surface portions are bonded to each other in a fluid-filled bag-shaped container in which a plurality of cells are formed, which are partitioned by a joint portion between the inner surface film and the outer surface film and are filled with fluid and expanded. A pump-type discharge device is provided on the upper edge portion of the sheet material, and is located at least at a position corresponding to the lower side of the pump-type discharge device on the side surface portion, downward from the upper edge portion in the vertical direction of the side surface portion. A plurality of columnar cells extending to the side are formed, and the columnar cell has a lower end corresponding to the upper end of the upper edge side and the lower end of the side surface portion, and is between the upper end and the lower end. The fluid-filled bag-shaped container is characterized in that the side surface portion is continuously and linearly extended in the vertical direction because the joint portion is not crossed.

In the present invention, the columnar cell may be formed so that the width from the upper end to the lower end is the same.

Further, in the present invention, each of the plurality of columnar cells may be formed in parallel with the same thickness and at regular intervals.

In the present invention, the width of the columnar cell filled with the fluid and expanded may be 5 mm or more and 20 mm or less.

In the present invention, a supply port for supplying the fluid to the columnar cell is provided at a position above the side surface portion and laterally deviated from a position corresponding to the lower side of the pump type discharge device, and the bottom surface portion is provided. A mountain fold portion is provided in which a part of the container is bent so as to be convex inside the container, and a portion between the plurality of columnar cells is a joint portion extending in the vertical direction of the side surface portion. A communication portion for communicating the adjacent columnar cells is formed so as to cross the joint portion, and the communication portion is provided on the side surface portion below the supply port and above the mountain fold portion. You can have it.

In the present invention, the columnar cell has an upper columnar cell from the upper end to the communication portion and a lower columnar cell from the lower end to the communication portion, and the upper columnar cell and the lower columnar cell are They may have the same width and be aligned on the same straight line.

Furthermore, in the present invention, a single or a plurality of central cells located in the central portion of the predetermined three or more columnar cells adjacent to each other in the width direction of the side surface portion and a single number on both sides of the central cell. Alternatively, the plurality of first side cells and the second side cell are communicated with each other by a communication portion located at an intermediate portion in the height direction of the side surface portion of the three or more columnar cells, and among the communication portions. The first communication portion that communicates the central cell and the first side cell and the second communication portion that communicates the central cell and the second side cell are the heights of the side surface portions. It may be provided at a position deviated in the longitudinal direction.

The central cell, the first side cell, and the second side cell in the present invention are an upper columnar cell from the upper end to the first communication portion or the second communication portion, and the first communication from the lower end. The upper columnar cell and the lower columnar cell may have the same width and be arranged on the same straight line.

Then, in the present invention, the bottom surface portion is formed with a bottom surface cell that is partitioned by the joint portion between the inner surface film and the outer surface film and is filled with fluid to expand, and the columnar cell and the bottom surface cell communicate with each other. You can have it.

Even if the container in the present invention is formed of a sheet material in a bag shape, a plurality of columnar cells extend in the vertical direction on the side surface portion thereof, particularly at a position corresponding to at least the lower side of the pump type discharge device. Is formed. These columnar cells are hollow portions having a length from the upper end on the upper edge side of the side surface portion to the lower end corresponding to the lower end portion of the side surface portion, and the inner surface film and the outer surface forming the side surface portion. It is a hollow portion that is continuous in the vertical direction and is filled with fluid and expands without crossing the joint portion that linearly joins the film. Therefore, the stable shape of each columnar cell is a state in which tension is applied to the entire inner surface of each columnar cell due to the pressure of the fluid filled therein, and the tension is balanced as a whole. Therefore, for example, when an external force is applied in the direction of bending the columnar cell, the deformation of the columnar cell becomes particularly large, so that the reaction force against the external force is large, and therefore the columnar cell tries to maintain the state immediately before it. In other words, the stress that keeps the side surface or the container upright is large, and the stress is the stress that opposes the buckling of the container. It is possible to obtain a high-strength container in which the stress against the above is large and buckling deformation hardly occurs. Further, according to the present invention, the buckling strength is improved by devising the structure of the side surface portion, so that even if the pump type discharge device is provided, the container itself or a special member for using the container is provided. Alternatively, it is not necessary to provide additional means, and therefore a bag-shaped container having high buckling strength can be obtained at low cost.

Further, in the present invention, since the width of the columnar cell is 5 mm or more and 20 mm or less, the dimension in which the columnar cell protrudes inside the container when the columnar cell is filled with a fluid and expanded can be reduced, and as a result, the container The buckling strength of the container can be increased without significantly reducing the content of the container. Similarly, the size of the columnar cell protruding to the outside of the container is small, and the unevenness of the outer surface of the container is small, so that the appearance of the container is improved.

Furthermore, each columnar cell is provided with a communication part that allows fluid to flow in, and the position of the communication part is between the upper supply port and the lower mountain fold part, so that the communication part bends the side surface. It is possible to obtain a bag-shaped container having a buckling strength that can sufficiently withstand practical use by reducing the influence of the communicating portion on the buckling strength such as induction.

On the other hand, according to the present invention, the first communication portion and the second communication portion that allow the cells to communicate with each other in the lateral direction (width direction of the side surface portion) are arranged so as to be offset in the height direction of the side surface portion. The communication portion cuts the continuity in the height direction of the cell or the continuity of the joint portion extending in the height direction that divides the cell, and is likely to be a starting point of deformation such as buckling deformation. In the present invention, the first communication portion and the second communication portion are not arranged in a horizontal straight line on the side surface portion. That is, it has been solved that the so-called bending line is a horizontal straight line that induces bending deformation such as buckling deformation. Therefore, when a load is applied to the container from above, the load that can withstand buckling (maximum load that does not cause buckling) becomes large, and the container can be made into a container having high buckling strength.

It is a front view of an example of the container which concerns on this invention. It is a perspective view which shows typically the container which removed the pump dispenser. It is a partially enlarged perspective view which shows by breaking a part of each film. It is a developed view which shows an example of the sheet material which comprises a container. It is a partial perspective view when the bottom surface part is seen from the diagonally lower side. It is a partial perspective view when the side surface portion is removed and the bottom surface portion is viewed obliquely from the upper side. It is a front view which shows the container of another embodiment of this invention. It is a perspective view which shows typically the container which removed the pump dispenser. It is a developed view which shows an example of the sheet material which comprises the container. It is a schematic diagram for demonstrating the arrangement state of the communication part.

Embodiments of the present invention will be described with reference to the drawings. It should be noted that the embodiments described below are merely examples of cases where the present invention is embodied, and do not limit the present invention.

FIG. 1 shows a container 1 according to an embodiment of the present invention as a front view. The container 1 is a container formed in a bag shape by folding one sheet material 2 in half at the central portion in the longitudinal direction thereof and welding (joining) the peripheral portions that are in surface contact with each other. The central portion to be folded in half is a bottom surface portion 3 having a certain width, and the portion of the container 1 opposite to the bottom surface portion 3 is an upper edge portion 4 in which the peripheral portion of the sheet material 2 is welded (joined). It has become. A spout 5 is attached to the central portion of the upper edge portion 4 (the central portion in the width direction of the container 1).

The spout 5 may have a conventionally known structure, and has a cylindrical neck portion having a male screw formed on the outer peripheral surface and a so-called base portion which is a portion below the neck portion and is joined to the container 1. And have. A cap (not shown) is attached to the neck to seal the container 1, or a pump dispenser (pump type discharge device) 6 is attached. The pump dispenser 6 may have a conventionally known structure. Further, the base portion is a portion sandwiched between the sheet materials 2 and joined to the sheet material 2, and the outer shape thereof is streamlined in both the left and right directions in order to secure the joining area and avoid the formation of gaps. It has an extended shape. The container 1 with the pump dispenser 6 removed is shown in FIG. 2 in a schematic perspective view.

Here, the sheet material 2 will be described. As shown in FIG. 3, the sheet material 2 has a two-layer structure including an inner surface film 2a and an outer surface film 2b. The inner surface film 2a is a film having a thickness of about 150 μm, and is, for example, an adhesive layer 2a-1 that is thermally adhered (welded) to the outer surface film 2b and a barrier layer 2a configured to suppress gas permeation. It is composed of a laminated film in which -2 and an inner layer 2a-3 arranged on the innermost side of the container and touching the contents are laminated. The adhesive layer 2a-1 is preferably composed of a resin film having a heat-sealing property, and as the adhesive layer 2a-1, for example, a resin film such as a polyolefin resin or a polyester resin can be used. Among the resin films of the above, it is particularly preferable to use a film made of a linear low-density polyethylene resin (hereinafter referred to as LLDPE).

The barrier layer 2a-2 suppresses the permeation of oxygen, water vapor, aroma substances, etc., and is particularly composed of a resin film or coating film having an oxygen barrier property in which the transmittance of oxygen gas is smaller than that of other gases. ing. When the barrier layer 2a-2 is composed of a coating film, a paint mainly composed of a synthetic resin material that does not easily permeate oxygen and water vapor is applied to the adhesive layer 2a-1 or the inner layer 2a-3, and then dried. To form. Examples of the resin film and synthetic resin material constituting the barrier layer 2a-2 include ethylene / vinyl alcohol copolymers. As the inner layer 2a-3, it is preferable to use a resin film having a heat-sealing property such as a polyolefin resin or a polyester resin as in the adhesive layer 2a-1, and it is particularly preferable to use a film made of LLDPE.

The outer surface film 2b is a film having a thickness of about 60 μm, and is composed of a laminated film in which a base material layer 2b-1 as a base and an outer layer 2b-2 arranged on the outermost side of the container are laminated. The base material layer 2b-1 is, for example, heat-bonded to the inner surface film 2a, and is made of a resin film having a heat-sealing property. As the base material layer 2b-1, a resin film such as a polyolefin resin or a polyester resin can be used as in the adhesive layer 2a-1, and it is particularly preferable to use a film made of LLDPE. When a film made of LLDPE is used, thermal adhesion between the base material layer 2b-1 and the adhesive layer 2a-1 can be easily performed as compared with the case where other films are used, and the base material layer 2b can be easily bonded. The adhesive strength between -1 and the adhesive layer 2a-1 can be improved. As the outer layer 2b-2, for example, it is preferable to use a resin film such as a polyamide resin, a polyolefin resin, or a polyester resin, and it is particularly preferable to use a film made of nylon (registered trademark) resin.

The inner surface film 2a and the outer surface film 2b are not bonded to each other on the entire surface thereof, but are bonded by linearly joining a peripheral portion and a predetermined portion inside the peripheral portion. A cell 8 which is a large number of fluid filling chambers partitioned by a linear joining portion 7 joining the films 2a and 2b is provided. These cells 8 are filled with a fluid such as air at a predetermined pressure (for example, 0.25 MPa) and expand, that is, when the films 2a and 2b are in a stretched state, the container 1 has a bending strength and a bending strength. It is for imparting buckling strength.

The shape and structure of these cells 8, the shape and structure of the bottom surface portion 3 described above, and the structure for injecting a fluid into the cell 8 will be described with reference to FIG. FIG. 4 is a developed view of the sheet material 2 constituting the container 1. In FIG. 4, reference numeral H indicates a height direction in the container 1, and reference numeral W indicates a width direction in the container 1. The sheet material 2 has a rectangular shape, and the inner surface film 2a and the outer surface film 2b constituting the sheet material 2 are bonded (welded) to the entire peripheral portion, that is, the entire four sides. The central portion of the sheet material 2 in the longitudinal direction (height direction H) is the portion that becomes the bottom surface portion 3 described above, and the upper and lower side portions in FIG. 4 from the portion that becomes the bottom surface portion 3 are the side surface portions 9. Is the part that becomes.

A plurality of columnar cells 8A are formed in the portion serving as the side surface portion 9. The upper and lower side edges (short sides) of the sheet material 2 shown in FIG. 4 are the above-mentioned upper edge 4 when assembled as a container 1, and the films 2a and 2b are linearly joined and two. It is a joint portion that is folded in half and overlapped, and the short side portions that sandwich the spout 5 are joined to each other. The columnar cell 8A is a thin linear fluid filling chamber extending in the height direction H, and is arranged parallel to the upper edge portion 4 and the bottom portion 3 at regular intervals in the width direction W. It is provided in. That is, the inner surface film 2a and the outer surface film 2b are joined (welded) between the upper edge portion 4 and the bottom surface portion 3 by linear joining portions 7 arranged in parallel at predetermined intervals in the width direction W. The portion between these linear joints 7 is a columnar cell 8A. Welding of the films 2a and 2b may be performed by sandwiching a part of the films 2a and 2b together and heating the films 2a and 2b to, for example, about 210 ° C. for a short time (about 0.2 seconds).

Therefore, the columnar cell 8A is formed in a shape extending linearly in the height direction of the container 1 over substantially the entire side surface portion 9 including the portion corresponding to the lower side of the pump dispenser 6 in the container 1. In the examples shown in FIGS. 1 and 4, the width (or thickness) of the columnar cell 8A is constant from the upper end Eu to the lower end Eb. The width is preferably 5 mm or more and 20 mm or less, that is, a width in the range of 5 mm to 20 mm. The upper end Eu of these columnar cells 8A is located at the boundary portion of the upper edge portion 4, and the lower end Eb is located at a position corresponding to the boundary portion between the bottom surface portion 3 and the side surface portion 9. Therefore, the columnar cell 8A can be said to be an elongated fluid filling chamber in which the joint portion 7 extends linearly in the height direction H of the container 1 without crossing the joint portion 7. In other words, in the region of the side surface portion 9 where the columnar cell 8A is provided, there is no linear joint portion facing the width direction W.

A communication portion 10 for communicating columnar cells 8A arranged side by side in the width direction W of the container 1 is formed. The communication portion 10 is a flow path for supplying the fluid to be filled in the columnar cell 8A, and is a portion configured to cross and penetrate a part of the linear joint portion 7 partitioning the columnar cell 8A. , Each film 2a, 2b can be formed by applying a treatment that does not cause adhesion or welding in a part of the portion between the columnar cells 8A when joining the films 2a and 2b. Since the communication portion 10 may act to reduce the buckling strength of the container, its distribution cross-sectional area (opening width) is set to be equal to or less than the width of the columnar cell 8A. Further, in the example shown in FIG. 4, the communication portions 10 are aligned in a straight line in the width direction W in the container 1. In the case of such a configuration, since the columnar cell 8A visually seems to be divided into two, the columnar cell 8A is composed of the upper columnar cell and the lower columnar cell arranged on the same straight line with each other. It can be said that it is.

Next, the bottom surface portion 3 will be described. The bottom surface portion 3 is a portion having a predetermined width on both sides of the central line in the longitudinal direction of the sheet material 2, and the bottom surface portion 3 in the container 1 in the width direction W. A bottom cell 8B is formed in the central portion. A non-joint portion 11 having a predetermined contour such as a rectangle is provided on the outside of the bottom cell 8B (the portion of the container 1 on the side end side in the width direction W). The non-joint portion 11 is a portion surrounded by a joint portion 7 in which the films 2a and 2b are linearly bonded, but unlike the cell 8 described above, the non-joint portion 11 is a closed space in which no fluid is filled. Therefore, since these non-joining portions 11 are closed vacant spaces where the two films 2a and 2b are simply overlapped with each other, no reaction force with respect to bending is particularly generated, and the non-bonded portions 11 can be easily bent. The non-joining portions 11 are formed at a total of four locations on both sides of the sheet material 2 with a line crossing the central portion in the longitudinal direction and on both side portions in the width direction W of the sheet material 2. This is because a mountain fold is made at the non-joint portion in order to remove a gusset (town) on the bottom surface portion 3. Here, "mountain fold" means to fold the portion corresponding to the bottom surface portion 3 so as to be convex toward the inside of the container 1, and the mountain fold line is shown by a solid line in FIG. The schematic shape of the folded portion 12 is shown in FIG. 5 as a view from the bottom surface side of the container 1, and FIG. 6 is shown as a view of the bottom surface portion 3 viewed from diagonally above. In FIG. 6, the side surface portion 9 is omitted. Further, of the boundary line between the bottom surface portion 3 and the side surface portion 9, the portions on both ends in the width direction W are valley fold lines that are bent so as to be convex to the outside of the container 1 in accordance with the above-mentioned mountain fold. It is shown by a broken line in FIG. 4).

The central portion of the bottom surface portion 3 between the non-joining portions 11 is the bottom surface cell 8B. The bottom cell 8B has a joint portion 7 located at the center of the container 1 in the width direction W of the linear joint portions 7 formed by partitioning the columnar cell 8A described above from the side surface portion 9 to the bottom surface portion 3. A second joint portion 7 separated from the central joint portion 7 in the width direction W is similarly extended from the side surface portion 9 to the bottom surface portion 3 to be formed. Therefore, the two columnar cells 8A communicate with one bottom cell 8B. Further, the communication portion 10 is formed at a position corresponding to the central portion of the bottom surface portion 3 among the joint portions 7 extending to the bottom surface portion 3. Therefore, each bottom cell 8B communicates with the columnar cell 8A of the side surface portion 9 and communicates with each other by the communication portion 10.

A supply port 13 for supplying a fluid such as air is provided in the columnar cell 8A and the bottom cell 8B. The supply port 13 is a hole formed in the sheet material 2 so as to communicate with any of the columnar cells 8A, and one of the sheet materials 2 is opposed to each other so as to form the side surface portion 9. It is formed so as to open between the films 2a and 2b forming the sheet material 2. Further, in the example shown in the figure, the supply port 13 is formed at a position deviated from the position corresponding to the lower side of the pump dispenser 6 in the lateral direction (width direction W of the container 1) and at the upper part of the container 1. Has been done. More specifically, the supply port 13 is a hole formed in the outer surface film 2b.

The portion where the supply port 13 is provided is a non-joint portion or a vacant space where the inner surface film 2a and the outer surface film 2b are not joined in an area wider than the opening area of the supply port 13, and in the example shown in the figure, it is rectangular. It is a vacant space. One columnar cell 8A located below the vacant space is connected to the vacant space, that is, the supply port 13. After filling the columnar cell 8A with a fluid, the columnar cell 8A is sealed by welding or the like, and is blocked from the supply port 13 or an empty space in which the columnar cell 8A is formed. The above-mentioned communication portion 10 that communicates the columnar cells 8A with each other is provided within a range from the supply port 13 or a vacant space around the supply port 13 to the above-mentioned mountain fold portion 12. This is to avoid a decrease in bending strength or buckling strength due to the communication portion 10 and the vacant space or the mountain fold portion 12 being lined up in the width direction.

In order to make the container 1 from the sheet material 2 shown in FIG. 4, the container 1 is bent along the boundary line between the bottom surface portion 3 and the side surface portion 9, and the mountain fold line shown by the solid line and the valley shown by the broken line in the bottom surface portion 3 are shown. Fold it along the fold line. The sheet materials 2 are joined to each other at the edge portions on both sides in the width direction W which are faced and overlapped in this way, the edge portions at both ends in the height direction H where the spout 5 is sandwiched and faced, and the portion of the mountain fold line. Welding). The portion where the sheet materials 2 are joined to each other in this way is shown with hatching in FIG. On the other hand, the portion where the films 2a and 2b are joined to form the cell 8 is shown with shading in FIG.

In that state, a fluid such as air is injected from the supply port 13. After that, a predetermined portion of the sheet material 2 is linearly joined (welded) so as to block the columnar cell 8A from the above-mentioned vacant space where the supply port 13 is formed. Since the columnar cells 8A and the bottom cells 8B are connected by the communication portion 10, the cells 8A and 8B expand due to the pressure of the fluid inside, and the film 2a forming the cells 8A and 8B by partitioning them. , 2b or sheet material 2 is tensioned to maintain the shape of each cell 8A, 8B.

The container 1 configured in this way has a rectangular shape as shown in FIG. 1 when viewed from the front, and the bottom surface 3 side is wide when viewed from the side surface side (right side or left side in FIG. 1). It becomes a triangle. Then, a plurality of columnar cells 8A extending in the height direction H appear on the side surface portion 9 as ridges having an arcuate cross section. Further, as shown in FIGS. 5 and 6, the bottom surface portion 3 has an uneven surface formed by the expansion of the wide bottom surface cell 8B.

Since the columnar cell 8A formed on the side surface portion 9 is in a state of being expanded by the pressure of the fluid filled inside, the pressure opposes the load applied from above the container 1 and is in the vertical direction of the container 1. Acts to increase the strength against the load of. Further, the load from above the container 1 acts as a load for buckling the container 1, but the columnar cells 8A form a thin linear shape extending in the height direction H, and a plurality of columnar cells 8A are formed adjacent to each other. Therefore, since there is little room for deformation or the resistance to bending deformation is large, the container 1 has such a columnar cell 8A, so that the strength against buckling is high.

In particular, the columnar cell 8A is a fluid filling chamber in which the joint portion in which the films 2a and 2b are linearly joined does not cross the entire area from the upper end Eu to the lower end Eb. That is, in the region where the columnar cell 8A is provided, there is no linear joint portion (welded portion) facing the width direction W. In other words, the entire area from the upper end Eu to the lower end Eb expands due to the pressure of the filled fluid, and tension is generated based on that pressure, which serves as a low-strength part for buckling deformation or the starting point of buckling deformation. There is no place. Therefore, the buckling strength of the container 1 is increased by forming the columnar cell 8A having the above-described configuration on the side surface portion 9. Therefore, even when the container 1 is configured with the pump dispenser 6 attached to the upper end portion, the container 1 buckles and deforms when the pump dispenser 6 is pushed down to discharge the contents, which is sufficient for that purpose. There is no inconvenience such as not being able to push down. In other words, with a small amount of material called the sheet material 2, it is possible to obtain a container 1 having high strength that can withstand pump operation, and it is possible to obtain a container 1 that can contribute to the conservation of the global environment and the conservation of resources.

Here, the results of the strength test conducted by the present inventors will be described. A plurality of containers 1 having different widths of the columnar cells 8A described above were prepared, a buckling load was applied to the containers 1, and a load that causes buckling deformation, that is, a buckling strength was specified. Prepare a plurality of containers 1 having columnar cells 8A having widths of 4 mm, 7.5 mm, 9.5 mm, and 12 mm, respectively, and apply a depressing load to each of them to cause a load (N: Newton) that causes deformation more than the allowable deformation. Was measured as the buckling strength. When the width was 4 mm, the buckling strength was about 20 N, and when the width was 7.5 mm, the buckling strength was about 30 N to 40 N. Further, when the width was 9.5 mm, the buckling strength was about 60 N to 70 N, and when the width was 12 mm, the buckling strength was about 60 N. That is, the buckling strength increases as the width of the columnar cell 8A increases, but when the width of the columnar cell 8A exceeds 9.5 mm, the buckling strength becomes almost constant and the width of the columnar cell 8A is increased. It was found that the effect of increasing the buckling strength was saturated. Assuming that the minimum buckling strength is 30 N (Newton), it is recognized that the width of the columnar cell 8A needs to be about 5 mm. Therefore, as an example of the present invention, the lower limit of the width of the columnar cell 8A is set to 5 mm. bottom. On the other hand, when the width of the columnar cell 8A is wide, the unevenness of the surface of the side surface portion 9 of the container 1 becomes remarkable, and as a result, the internal volume is reduced and the appearance as a product after filling the contents is impaired. If the width of the columnar cell 8A is 9.5 mm or more, the buckling strength is saturated. Therefore, as an example of the present invention, the upper limit of the width of the columnar cell 8A is set to 20 mm.

Next, other embodiments of the present invention will be described. In the above-described embodiment, the communication portions 10 are arranged in a horizontal straight line in the width direction W of the container 1. On the other hand, in another embodiment described below, in order to increase the buckling strength of the container 1, each communication portion 10 is provided so that all of the communicating portions 10 do not line up in a horizontal straight line. FIG. 7 is a front view showing an example thereof, FIG. 8 is a perspective view schematically showing a container 1 from which the pump dispenser has been removed, and FIG. 9 is a developed view of a sheet material constituting the container 1. The container 1 of the other embodiment described below is different from the container 1 of the above-described embodiment in the configuration of the communication portion 10, and the other configurations are substantially the same as the container 1 of the above-described embodiment. , The same reference numerals are given to the drawings for the configurations or parts common to the container 1 of these embodiments, and the description thereof will be omitted.

In the container 1 of the embodiment shown in FIGS. 7 to 9, the communication portions 10 adjacent to each other in the width direction of the container 1 are arranged so as to be alternately offset in the height direction H of the container 1. To illustrate this schematically, FIG. 10 shows an appropriate three of the above-mentioned plurality of columnar cells 8A, and some of them are shown, and among these three columnar cells 8A adjacent to each other. The columnar cell 8A located in the center is the central cell 80, one of the left and right columnar cells 8A sandwiching the columnar cell 8A is the first side cell 81, and the other is the second side cell 82. The first communication portion 101 that communicates the central cell 80 and the first side cell 81 is formed so as to penetrate the joint portion 7 between these cells 80 and 81. Similarly, the second communication portion 102 that communicates the central cell 80 and the second side cell 82 is formed so as to penetrate the joint portion 7 between these cells 80 and 82. The first communication portion 101 and the second communication portion 102 are displaced by a predetermined dimension in the height direction H of the container 1. The deviation dimension (interval in the height direction H) is a dimension in which a part of each communication portion 101, 102 does not line up (do not overlap) in the width direction W of the container 1, and as an example, each communication portion 101, 102 The size is several times to ten and several times the width (opening width) of. The arrangement relationship of the communication portions 101 and 102 is the same for the communication portion 10 for the other columnar cells 8A.

Therefore, in the examples shown in FIGS. 9 and 10, every other communication portion 10 in the width direction W of the container 1 has the same position in the height direction H of the container 1 and is arranged in a horizontal straight line. , A joint 7 is interposed between them. Therefore, not all of the communication portions 10 that communicate the columnar cells 8A with each other are arranged in a horizontal straight line, and are located offset from each other in the height direction H of the container 1. Therefore, even if the communicating portion 10 is a portion that is vulnerable to bending such as buckling deformation, the weak portion is not lined up in a horizontal straight line, and a part of the two columnar cells 8A or a part thereof is located between them. A joint portion 7 that partitions the columnar cell 8A is interposed to ensure strength against deformation such as bending.

As shown in FIG. 9, even if the communicating portions 10 adjacent to each other are displaced in the height direction H of the container 1, the linear portion of the columnar cell 8A is also referred to as a portion up to the communicating portion 10. obtain. That is, in the case of such a configuration, the columnar cell 8A visually seems to be divided into two by the portion of the line connecting the communication portions 10, so that the upper columnar cells arranged on the same straight line with each other. It can also be said that the columnar cell 8A is composed of the lower columnar cell and the lower columnar cell.

Here, the position of the communication portion 10 provided so as to be offset in the height direction H will be described. Since the communicating portion 10 acts as a starting point for buckling deformation or bending deformation of the container 1 or induces such deformation, in order to avoid such deformation and improve the buckling strength of the container 1. There is a preferred position of the communication portion 10 in. Since the above-mentioned supply port 13 and the vacant space or mountain fold portion 12 in which the supply port 13 is formed are portions that act to reduce the buckling strength, the communication portion 10 is formed from these vacant spaces and mountain fold portions 12. It is preferable to provide them apart. On the other hand, if the amount of displacement between the communicating portions 10 (the distance between the containers 1 in the height direction H) is small, the communicating portions 10 are aligned in a horizontal straight line, which is similar to the existence of a bending line, and the buckling strength is increased. It can be low. Therefore, it is considered necessary to increase the amount of deviation between the communication portions 10 to some extent. According to the experiments conducted by the present inventors, the height of the side surface portion 9 (height measured along the side surface portion 9) is about 173 mm, and when the communication portions are arranged at the upper and lower two places, the communication on the upper side is performed. The portion 10 is located at a position of about 70 mm from the upper end of the side surface portion 9, and the lower communicating portion 10 is located at a position of about 100 mm from the upper end of the side surface portion 9 (therefore, the amount of deviation of the communicating portion 10 in the height direction H is about 30 mm). It was found that the buckling strength was maximized by providing it in. It is considered that the ratio of each of these dimensions can be applied to the containers 1 having different heights or widths to improve the buckling strength thereof.

As described above, according to the embodiment described with reference to FIGS. 7 to 10, since the communication portions 10 are not arranged in a horizontal straight line in the width direction of the container 1, the communication portions 10 are bent. On the other hand, even if it is weak, the cells 8 (columnar cells 8A) and the joining portions 7 on both sides of the cells 8 compensate for the decrease in strength against bending due to the communicating portion 10. Therefore, the buckling strength of the container 1 can be further improved.

The present invention is not limited to the above-described embodiment, and the columnar cells in the present invention need only be continuous and linearly extending in the vertical direction of the container, and are directed from the upper end side to the lower end side. The shape may change linearly. For example, the width at the upper end and the width at the lower end do not necessarily have to be the same, and their widths may be different so as to have a trapezoidal shape or a shape close to a triangular shape when viewed from the front. In short, in the present invention, the linear extension of a columnar cell means a shape in which the lines on both sides in the width direction defining the shape of the columnar cell are a straight line or a line equivalent thereto. ing. Further, in the present invention, the communication portions that communicate the columnar cells with each other do not need to be arranged in a straight line, and may be arranged at positions appropriately displaced in the height direction according to the position in the width direction of the container. Further, the columnar cell may be arranged at least at a position corresponding to the lower side of the pump type discharge device (within the width range of the pump type discharge device), and is different from the columnar cell in other places. A cell (fluid filling chamber) may be provided.

On the other hand, in the case of a configuration in which the communication portions are arranged so as to be offset in the height direction of the container so that the communication portions are not arranged in a horizontal straight line, the effect of improving the buckling strength or the bending strength is that the communication portions are arranged in the height direction. Since it is brought about by the deviation, such an arrangement structure of the communication portions can be applied to a container in which the cell shape is other than the columnar cell described above. For example, the cell is not limited to an elongated shape or a linear shape in the height direction, and may have an appropriate shape such as a square or a rectangle when viewed from the front. Further, in the present invention, the central cell and each side cell may be singular or plural, respectively, and in the case of a plurality of cells, the communication portion for communicating the central cells with each other and the communication portion for communicating the side cells with each other are the containers. They may be aligned on a straight line in the width direction or may be offset in the height direction. Further, the communication portions may be arranged by shifting them to three or more places in addition to shifting them to two places in the height direction.

1 Container 2 Sheet material 2a Inner surface film 2b Outer surface film 2a-1 Adhesive layer 2a-2 Barrier layer 2a-3 Inner layer 2b-1 Base material layer 2b-2 Outer layer 3 Bottom part 4 Top edge part 5 Spout 6 Pump dispenser (pump type) Discharge device)
7 Joint 8 Cell 8A Columnar cell 8B Bottom cell 9 Side part 10 Communication part 11 Non-joint part 12 Mountain fold part 13 Supply port 80 Central cell 81 1st side cell 82 2nd side cell 101 1st communication part 102 2 communication part Eu Upper end Eb Lower end H Height direction W Width direction

Claims (9)

The sheet material obtained by laminating the inner surface film and the outer surface film forms a bag shape having a side surface portion and a bottom surface portion, and the inner surface film and the said surface portion are formed on at least the side surface portion of the side surface portion and the bottom surface portion. In a fluid-filled bag-shaped container, which is partitioned by a joint with an outer film and is filled with a fluid to form a plurality of expanded cells.
A pump-type discharge device is provided on the upper edge of the sheet materials that are bonded to each other.
A plurality of columnar cells extending downward from the upper edge portion in the vertical direction of the side surface portion are formed at least at a position corresponding to the lower side of the pump type discharge device in the side surface portion.
The columnar cell has an upper end on the upper edge side and a lower end corresponding to the lower end of the side surface portion, and the side surface portion is formed by not crossing the joint portion between the upper end portion and the lower end portion. A fluid-filled bag-shaped container characterized in that it has a shape that extends continuously and linearly in the vertical direction. In the fluid-filled bag-shaped container according to claim 1.
The columnar cell is a fluid-filled bag-shaped container characterized in that the width from the upper end to the lower end is the same. In the fluid-filled bag-shaped container according to claim 1 or 2.
A fluid-filled bag-shaped container, wherein each of the plurality of columnar cells has the same thickness and is formed in parallel with each other at regular intervals. In the fluid-filled bag-shaped container according to any one of claims 1 to 3.
A fluid-filled bag-shaped container characterized in that the width of the columnar cell filled with the fluid and expanded is 5 mm or more and 20 mm or less. In the fluid-filled bag-shaped container according to any one of claims 1 to 4.
A supply port for supplying the fluid to the columnar cell is provided at a position above the side surface portion and laterally deviated from a position corresponding to the lower side of the pump type discharge device.
A mountain fold portion is provided in which a part of the bottom surface portion is bent so as to be convex inside the container.
The portion between the plurality of columnar cells is a joint portion extending in the vertical direction of the side surface portion.
A communication portion that communicates the adjacent columnar cells is formed so as to cross the joint portion.
A fluid-filled bag-shaped container characterized in that the communication portion is provided below the supply port and above the mountain fold portion of the side surface portion. In the fluid-filled bag-shaped container according to claim 5.
The columnar cell has an upper columnar cell from the upper end to the communication portion and a lower columnar cell from the lower end to the communication portion.
A fluid-filled bag-shaped container characterized in that the upper columnar cell and the lower columnar cell have the same width and are lined up on the same straight line. In the fluid-filled bag-shaped container according to any one of claims 1 to 4.
A single or a plurality of central cells located in the central portion of three or more predetermined columnar cells adjacent to each other in the width direction of the side surface portion and a single or a plurality of first lateral cells on both sides of the central cell. The cell and the second side cell are communicated with each other by a communication portion located at an intermediate position in the height direction of the side surface portion of the three or more columnar cells.
Among the communication portions, the first communication portion that communicates the central cell and the first side cell and the second communication portion that communicates the central cell and the second side cell are A fluid-filled bag-shaped container characterized in that the side surface portion is provided at a position deviated from the height direction. In the fluid-filled bag-shaped container according to claim 7.
The central cell and the first side cell and the second side cell are an upper columnar cell from the upper end to the first communication part or the second communication part, and the first communication part or the first communication part from the lower end. It has a lower columnar cell at the second communication part,
A fluid-filled bag-shaped container characterized in that the upper columnar cell and the lower columnar cell have the same width and are lined up on the same straight line. In the fluid-filled bag-shaped container according to any one of claims 1 to 8.
On the bottom surface portion, a bottom surface cell partitioned by a joint portion between the inner surface film and the outer surface film and filled with fluid to expand is formed.
A fluid-filled bag-shaped container characterized in that the columnar cell and the bottom cell are in communication with each other.

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