JP3820489B2 - Free-standing container that prevents air from entering - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a so-called stand-pouch-like self-supporting container in which a wall is formed of a soft sheet and the bottom is expanded by filling the contents, and a check valve prevents inflow of air or the like. It is related with the self-supporting container which prevented mixing of air.
[0002]
[Prior art]
Conventionally, not only wine, sake, whiskey, but also fruit juice, vegetable juice, and other beverages whose flavor is reduced by oxidation or the like, glass bottles sealed with large cork stoppers or the like have been used. However, since such a glass bottle is heavy or easily broken, it is very troublesome to handle, and the present situation is that a plastic PET bottle is used instead of the glass bottle.
[0003]
In the hard container represented by this PET bottle, the volume of the container itself does not decrease as the contents decrease. Therefore, it is characterized in that it can be used as a pressure-resistant container for carbonated drinks and the like because it is highly stationary as a container and becomes a pressure-resistant container depending on its shape.
[0004]
[Problems to be solved by the invention]
However, in the case of a hard container such as a PET bottle, when the content is reduced, an empty space is generated in the container, and air usually enters the container. Therefore, since the contents are oxidized by contact with air, it is not suitable for storing not only wine, sake, whiskey, but also fruit juice drinks, vegetable juices, other drinks, etc. that do not like contact with air.
[0005]
Further, the volume occupied by the rigid container is always constant, and the container itself always occupies a certain space regardless of the presence or absence of contents. This can be seen how wasteful it is, for example, when a beverage is put in a container and stored in a refrigerator. That is, when 200 cc of water is put in a 1 liter container and put in the refrigerator, a volume of 800 cc is used in the refrigerator.
[0006]
In many cases, with the recent increase in awareness of environmental protection, cheaper bag-like containers have been used for refilling PET bottles, mainly household detergents, for the purpose of moving away from disposable containers. Yes. Most of the bag-like containers used for this purpose are self-standing containers called stand pouches for reasons such as ease of display at stores.
[0007]
Therefore, when we came up with the idea that this stand pouch-like container could be used in place of a PET bottle and made various studies, a spout was attached to the stand pouch-like container, and a check valve was attached to this spout. It was found that the check valve allows the contents to move when pressure is applied in the dispensing direction, and closes when the pressure is applied in the filling direction.
[0008]
At that time, the self-supporting container formed of a soft sheet is automatically subjected to negative pressure by the weight of the contents. The negative pressure causes the check valve to close when pressure is applied in the filling direction of the self-supporting container, resulting in a self-supporting container that can prevent air from entering. In other words, it can be said that this self-supporting container is a so-called vacuum container (having a suction prevention function at negative pressure) that always prevents air from entering.
[0009]
By the way, this self-supporting container has self-supporting property only when the contents are fully filled, and when the content decreases, the volume decreases and the self-supporting property is lost. It has been found that the lost bag-like container 200 has a problem that it is very difficult to handle because the entire bag-like container collapses because the head collapses in the middle and the head falls.
[0010]
This self-supporting container that prevents the entry of air provides a so-called vacuum container that prevents air from entering constantly, while maintaining the advantages of a conventional stand-pouch-like container such as flexibility and high volume efficiency. An object of the present invention is to provide a stand-pouch-like container that is self-supporting when contents are reduced, which is not found in conventional stand-pouch-like containers.
[0011]
[Means for Solving the Problems]
That is, the self-standing container of the present invention that prevents air from being mixed is a self- supporting container body that can be self-supported by forming a wall surface with a soft sheet and filling the contents to expand the bottom, and the width direction of the container body It consists of a pair of outwardly projecting folds that hang downward from the lower end of the spout at the center, a spout provided at the end of the container body, and a check valve provided inside the spout, The check valve allows the contents to move when pressure is applied in the dispensing direction, and closes when the pressure is applied in the filling direction. The check valve is closed by the negative pressure generated in the self-supporting container by the movement to prevent air from entering, and a water column is formed according to the pair of folds from the lower end of the spout toward the remaining contents at the bottom of the container. Lodging by being Is characterized in that to prevent contamination of the air, characterized in that preventing the.
[0012]
In addition, the self-supporting container of the present invention that prevents air from being mixed is a self-supporting container in which a wall surface is formed of a soft sheet, and the bottom is stretched by filling the contents, and the center of the container body in the width direction a pair of folds projecting outwardly extending downward toward the spout bottom downward part, the end of the freestanding container, heat shrinkable tubing and, material you material yet thermal welding to the outer not thermally welded inside A joint tube formed with two layers of resin tubes is provided, and the joint portion of the spout is inserted into the joint tube and heated to shrink the heat-shrinkable tube and tighten the joint portion. It consists of a spout and a check valve provided inside this spout. The check valve allows the contents to move when pressure is applied in the discharge direction, and closes when pressure is applied in the filling direction. When the container is erected after the contents are discharged, the check valve is closed by the negative pressure generated in the self-supporting container due to the downward movement of the contents to prevent air from entering, and the lower end of the spout The water column is formed in accordance with the pair of folds from the container toward the remaining contents at the bottom of the container, thereby preventing the lodging .
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0014]
FIG. 1 is a perspective view showing a first embodiment of the present invention. The self-supporting container 1 of the present invention has a stand-pouch shape formed of a soft sheet by a conventional method, and is configured by providing a spout 3 at the upper end of the container body 2 in the soft sheet portion. Reference numeral 4 denotes a fold formed so as to protrude outward from the container body 2 and downward from the spout 3.
[0015]
In the figure, the material of the container body 2 can be selected from a plastic sheet, a metal sheet, or a composite sheet using these as a constituent material. Examples of the plastic sheet include polyethylene, polypropylene, polyester, polycarbonate, nylon resin and the like. Using these soft sheets or composite sheets as raw materials, two raw material sheets (main body side wall sheet members) are bonded together, and the periphery thereof is heat-sealed with a predetermined width, whereby the container main body 2 is formed by heat welding. .
[0016]
In addition, in the bottom part of the container main body 2, the bottom part sheet | seat member 6 turned down in the meantime is interposed, and it welds. Accordingly, when the container body 2 is filled with the contents, the folded portion 5 at the bottom opens and the bottom sheet member 6 expands to form the bottom of the container. Therefore, when the container main body 2 is placed on a table or the like in this state, the container main body 2 becomes independent without any support.
[0017]
As shown in FIG. 2 (a), the spout 3 is provided with a check valve 7 therein. The check valve 7 has a cylindrical shape, and has a structure in which a notch 8 extending to a cylindrical side wall is provided in a head formed in a dome shape. Then, as shown in FIG. 2 (b), when the container body 2 is sandwiched between hands and the abdomen is pushed to apply internal pressure, pressure is applied in the dispensing direction, the notch 8 is opened, and the contents are circulated. Released.
[0018]
Next, when the internal pressure of the container body 2 is released, the notch 8 is closed to prevent the inflow of air. At that time, since a negative pressure is applied to the self-supporting container 1 due to the weight of the contents, the check valve 7 is sealed by receiving the negative pressure, and air contamination can be completely blocked. By providing the check valve 7 in this way, it is possible to reliably prevent the contents in the self-supporting container 1 from being oxidized by touching air.
[0019]
The connection between the spout 3 and the container body 2 is as shown in FIGS. 3 and 4.
[0020]
First, a crease 4 is formed from the attachment site of the spout 3 toward the bottom of the container body 2. The crease 4 is desirably formed by bending a material sheet in advance. Then, after the container body 2 is formed in a bag shape by leaving only the opening 21 at the upper end in advance by the above method, a material that is not heat-welded on the inside and a material that is heat-welded on the outside are disposed inside the lower end of the heat shrinkable tube 9. The two-layered resin tube 10 is welded in the direction E with the resin tube 10 protruding a desired amount from the lower end of the heat shrinkable tube 9 to form the joint tube 11.
[0021]
Next, the joint tube 11 and the container body 2 are welded. At that time, the lower part of the joint tube 11 is inserted into the upper end opening 21 of the container body 2, and the container body 2, the heat-shrinkable tube 9 of the joint tube 11, and the container body 2 and the resin tube 10 of the joint tube 11 are separately provided. It welds by F and G shown to Fig.4 (a) . At this time, since the joint tube 11 is composed of a thin tube, the joint tube 11 is likely to be flat when sandwiched, and therefore, the joint portion between the joint tube 11 and the container body 2 (arrow portion in FIG. 4B). Necessary and sufficient welding strength can be obtained.
[0022]
The spout 3 is provided with a joint 12 with the container body 2 at the lower part, and the joint 12 is provided with an appropriate number (two in the figure) of grooves 13. And this junction part 12 is inserted in the joint tube 11, and the joint tube 11 is heated. Then, the heat shrinkable tube 9 of the joint tube 11 contracts and is fastened to the joint 12 of the spout 3. At this time, the heat-shrinkable tube 9 that has shrunk enters the groove 13 of the joint portion 12 and performs a reliable retaining action. Therefore, the number of the grooves 13 is appropriately large, and the deeper one has a higher retaining effect.
[0023]
In free-standing container 1 configured this way, in the case to use if the spout 3 as shown in FIG. 4 (a) as a handle, the pulling force (the container body filled with contents of the upward Such gravity (H) is mainly received by the joint portion 12 of the spout 3 and the heat shrinkable tube 9, and the force is further dispersed from the heat shrinkable tube 9 and the resin tube 10 to the welded portion of the container body 2.
[0024]
Conventionally, in the joining means between the soft bag-like portion and the hard cylindrical portion of this kind of container, stress is concentrated at the joining portion even though sufficient joining strength is not obtained. The joint was easily damaged. In the conventional structure, there were not many containers with a large capacity because there was such a problem. However, according to the joining structure in the self-supporting container of the present invention, the stress is dispersed and this joining is performed. It is possible to reliably prevent damage at the part.
[0025]
A cross section of each part of the container body 2 taken along the lines BB, CC, and DD in FIG. 1 when the self-supporting container 1 configured as described above is filled with contents (for example, a liquid such as water). Are as shown in FIGS. 5A, 5B, and 5C, respectively. And if the force which pushes the container main body 2 is released after pushing the container main body 2 in the way shown in FIG.2 (b) and pours the contents, while the content will fall to a bottom part with dead weight, by the effect | action of the non-return valve 7 Since air does not flow into the container main body 2, the contents and the inner surface of the container main body 2 are in close contact with each other, and the inside of the container main body 2 has a negative pressure.
[0026]
When the contents are discharged, the self-supporting container 1 narrows from the top as shown in FIGS. 6 (a) and 6 (b). For example, about 50% is discharged, BB, CC in FIG. The cross section of each part of the container main body 2 in DD is as shown in FIGS. 7 (a), (b), and (c). That is, a substantially quadrangular water column is formed by the crease 4 provided in the container body 2 from the lower end of the spout 3. The square column by the crease 4 is clearly formed in the upper part of the container main body 2 with a small amount of contents, thereby preventing refraction in the thickness direction of the container. Therefore, the quadratic prism formed by the crease 4 prevents the container body 2 from falling down.
[0027]
FIG. 8 shows another configuration example of each part of the self-supporting container 1 of the present invention. That is, in the above embodiment, the spout 3 is connected to the storage portion 14 of the check valve 7 and the joint portion 12 by a screw, but in FIG. It is. FIG. 2B shows the lower part of the joint 12 having a rectangular cross section. Thus, by making it a square cross section, the opening angle of the junction part (arrow part in a figure) of the heat contraction tube 9 or the resin tube 10 and the container main body 2 becomes an obtuse angle, and it becomes difficult to damage. Furthermore, the effect which promotes the effect | action of the crease | fold 4 of the container main body 2 can be anticipated.
[0028]
Of course, the cross section of the lower part of the joint 12 may be not only the above-mentioned circle and square, but also an ellipse, a shape with both ends in the longitudinal direction of the ellipse being acute angles, and other shapes, depending on the size and use of the container Can be determined as appropriate.
[0029]
Since the self-supporting container 1 of the present invention can be folded and stored in a state in which the contents are not filled, like a normal stand pouch-like container, it does not occupy a wasteful space during storage. Moreover, it can be used any number of times if washed.
[0030]
【The invention's effect】
Since the stand-up pouch-like self-contained container of the present invention is configured as described above, wine, sake, whiskey as well as fruit juice drinks that dislike contact with air such that the contents touch and oxidize the air, It is optimal for storage of vegetable juice, other beverages, etc., and can provide a vacuum-type container that is stable and independent without losing its independence even when the content is reduced.
[0031]
Of course, the stand-pouch-like container can be used as a self-contained container that replaces a reusable bottle-shaped container with a spout, not just as a disposable container. That is, when used as a self-supporting container regardless of the contents, it can be maintained upright with the bottom extended, and can be folded into a flat bag shape when not in use. It can be stored easily.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a self-supporting container in which air is prevented from being mixed according to the present invention.
FIGS. 2A and 2B are longitudinal sectional views thereof.
3A is an explanatory view of a process for manufacturing a self-supporting container of the present invention, and FIG. 3B is a longitudinal sectional view thereof.
FIGS. 4A and 4B are cross-sectional views of a main part showing a joined state. FIGS.
FIGS. 5A, 5B, and 5C are cross-sectional views of parts of the container body when the contents are filled, respectively.
6A and 6B are a front view and a side view, respectively, of a self-supporting container when contents are reduced.
FIGS. 7A, 7B, and 7C are cross-sectional views of each part of the container body when the contents are reduced.
FIGS. 8A and 8B are cross-sectional views of main parts showing another embodiment. FIGS.
FIG. 9 is a cross-sectional view of an essential part showing a conventional example of a stand-pouch-like container.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Self-supporting container 2 Container body 3 Outlet 4 Fold 5 Fold-up part 6 Bottom sheet member 7 Check valve 8 Notch 9 Heat shrinkable tube 10 Resin tube 11 Joint tube 12 Joint part 13 Groove 14 Storage part 21 Opening

Claims (2)

A self-supporting container body that can be self-supported by forming a wall surface with a soft sheet and filling the contents, and outward facing downward from the spout lower end at the center in the width direction of the container body A pair of folds protruding to the end of the container body, a spout provided at the end of the container body, and a check valve provided inside the spout, and when the check valve is pressurized in the dispensing direction, the contents When the container is erected after discharging the contents, the check valve is caused by the negative pressure generated in the self-supporting container due to the downward movement of the contents. Is closed to prevent air from entering, and the water column is formed in accordance with the pair of folds from the lower end of the spout toward the remaining contents at the bottom of the container, thereby preventing overturning. Self-supporting type that prevents contamination Vessel. Forming a wall with a soft sheet and filling the contents, a self-supporting container that expands the bottom and becomes self-supporting, and outwards that hang downward from the lower end of the spout at the center in the width direction of the container body A joint tube formed by a pair of protruding folds and a heat-shrinkable tube and a two-layer resin tube made of a material that is not heat-welded on the inside and a material that is heat-welded on the outside is provided at the end of the self-supporting container. The spout is provided by inserting the spout joint into the joint tube and heating the shrunk tube to contract and tighten the joint, and a check valve provided inside the spout. The check valve allows the contents to move when pressure is applied in the dispensing direction, and closes when pressure is applied in the filling direction. The check valve is closed by the negative pressure generated in the free-standing container due to the downward movement of the contents to prevent air from entering, and the pair of creases from the lower end of the spout toward the remaining contents at the bottom of the container A self-supporting container that prevents air from entering, characterized in that a water column is formed in accordance with the above, and lodging is prevented.

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