JP5229658B2 - Sealed structural chuck fluid containing bag - Google Patents

Description

  The present invention relates to a fluid housing bag with a sealed structure type chuck, and in particular, a sealed structure type chuck is provided in an opening for taking in and out the contents, and the inside of the bag is closed after the opening is closed by the chuck. In particular, the present invention relates to a fluid container bag with a sealed structure type chuck suitable for injecting and transporting fluid such as gas, liquid, gas-liquid mixture and the like.

  Conventionally, in order to prevent oxidation or maintain freshness in packaging of fresh food, packaging in a form in which a bag containing food is filled with an inert gas such as nitrogen, liquid such as oxygen, seawater, or broth It is used. As such a packaging form, a fluid supply path for fluid filling is formed at one edge of the bag base, and the bag base is expanded and deformed at the time of fluid filling, thereby overlapping the front and back surfaces in the fluid supply path. A bag that improves the adhesion of the film and prevents leakage from the fluid supply path has been proposed (for example, Patent Documents 1 and 2).

  In addition, in the packaging bags made of synthetic resin film, those that are integrally provided with a synthetic resin chuck at the opening are widely used so that the contents can be taken in and out, Among these synthetic resin chucks, those having integral sealing ridges for improving sealing performance have been developed.

This type of synthetic resin chuck includes a structure shown in FIGS. 11 and 12 (for example, Patent Document 3). As shown in FIG. 11 , the synthetic resin chuck is made of synthetic resin, and the opposed films constituting the opening of the flexible bag body are the base parts 1 and 2, and the surface of one of the base parts 1 Further, a female sealing tool 5 comprising a pair of female ridge protrusions 4 and 4 having a hook-shaped claw portion 3 having a hook-shaped cross section on the inner side surface of the tip portion is integrally projected, and the tip is formed on the surface of the other base portion 2. A male sealing device 8 having a pair of male ridges 7, 7 inserted between the female ridge ridges 4, 4, having hooked claws 6, 6 on the outer side surface of the unit. And a sealing ridge 9 that is press-fitted between the male ridges 7, 7 of the other base 2 at an intermediate position between the female ridges 4, 4 of the one base 1. There is integrally projects, the sealing protrusion 9 is the male with two claw portions 3,6 between them are engaged with each other by inserting the Ofutomegu 8 Mesufutomegu 5 Spear ridge 7,7 Rear 7a, is adapted to be press-fitted between 7a.

  In this synthetic resin chuck, the male and female hooks 4 and 7 are individually engaged and the sealing rib 9 is sealed separately, and between the male and female ribs 7 and 7 of the sealing rib 9. Since the male protrusions 7 and 7 are prevented from being deformed in the disengagement direction by press-fitting, the engaging property and the sealing property are excellent.

However, in this type of synthetic resin chuck, as shown in FIG. 12, when the deformation in the opening direction is applied between the base parts 1 and 2, the female ridge 4 on the deformation side is separated from the male ridge 7. It is curved in the direction of leaving, so that the gap between the sealing tools 5 and 8 is disengaged.

For this reason, for example, when used in an opening portion of a sealed bag, when a force in the opening direction acts between the bag inner sides of the base portions 1 and 2 due to the expansion of air in the bag, the problem that the bag is easily opened was there.

As shown in FIG. 13 , the synthetic resin chuck for solving such a problem, as shown in FIG. 13 , is formed on one side of a pair of base portions 10 and 11 having a tape shape, for example, the female protrusion 12 from the base portion 10. 12 and a pair of synthetic resin chucks 14 and 15 having a structure in which a male protrusion 13 is press-fitted between the female protrusions 12 and 12 from the base 11 on the other side. A double chuck arranged in parallel between the base parts 10 and 11 is fixed to the opening of the bag 6, and one side of the base parts 10 and 11, for example, both side edges 10a and 10b of the base part 10 are connected. The base 11 on the other side is fixed to the bag 6 and only the edge 11a on the opening side of the bag 6 is fixed to the bag 6 and the edge 11b on the inner side of the bag is not fixed to the bag 6. A device that is fixed to the opening of the bag 6 (for example, Patent Document 4) is known.

Synthetic resin chuck of the duplicate is or expand the air in the bag 6, by the pressure of the contents generated by the or an external force, the opening direction of the force is applied to the opening inside the bag 6, FIG. 14 , the bag 6 on the side not fixed to the base part 11 is folded back, so that the chucks 14 and 15 are aligned along a plane parallel to the base parts 10 and 11 rather than the force in the opening direction. Pulling forces A and B that are opposite to each other act on each other, and a shearing force acts on the ridges 12 and 13 of both chucks 14 and 15. For this reason, there is an effect that the chuck is difficult to be opened against the force in the opening direction of the bag opening.
JP 2002-270832 A JP-A-2005-206241 Japanese Patent No. 2938784 Japanese Patent No. 3297043

The conventional chuck described in Patent Document 4 shown in FIGS. 13 and 14 described above is based on the force in the opening direction in the bag as compared with that described in Patent Document 3 shown in FIGS. 11 and 12. Although it has a structure that is strong against the force in the opening direction due to the contents in terms of conversion to a reverse tensile force parallel to the plane of the parts 10 and 11, the shear stress of the two male protrusions 13 and 13 Only by this, the strength in the opening direction in the bag is limited.

Further, in the conventional chuck shown in FIG. 13 , the chuck 14 on the bag opening side mainly has a function of increasing the sealing degree, and the chuck 15 on the inner side of the bag has a function of preventing the opening, so that it is shown in FIG. Thus, when force is applied in the directions of arrows A and B by the force in the bag, the base 10 (11) is deformed by the moment in the perpendicular direction, and force in the opening direction acts on both chucks 14 and 15, There is a problem that the chuck 14 on the side that is easily opened is easily detached, and when one of the chucks is removed, the function of the double chuck is impaired, and the chuck 14 is easily opened by the internal pressure of the bag.

  In view of such a conventional problem, the present invention is more resistant to the force in the opening direction from the inside of the bag, can maintain a high degree of sealing, and contains a solid packaged item in the bag. In addition, it is possible to easily inject fluid such as gas or liquid into the inside without opening the chuck, and when the container is used in a shape retaining container such as a cardboard box or a wooden box, the shape retaining container The purpose of the present invention is to provide a fluid housing bag with a sealed structure type chuck that can open and close the chuck only from the upper surface side and can inject fluid without opening the chuck.

The invention according to claim 1 of the present invention is characterized in that it has a cylindrical bag base made of a synthetic resin film, and the synthetic resin sealed structural chuck is disposed in the opening of the bag base so as to cross the opening. And a fluid accommodation bag with a sealed structure type chuck having a fluid inlet that can be freely opened and closed in a portion other than the opening.
The bag base is provided with a seal portion that closes the entire lower end thereof,

On the upper end side of the bag base, an extension portion that is longer than the film on the other side is provided on one side of the synthetic resin film on the front and rear surface side that constitutes the bag base. The opening auxiliary piece is overlaid on the folded arrangement, and the overlapping portion between the tip end side of the extension portion and one end side of the opening auxiliary piece is integrated to form a belt-like seal portion. , Forming a non-joining portion that interrupts this, the non-joining portion as the fluid inlet,

The fluid inlet is curved so that the seal portion is pulled toward the center of the bag base as the bag base is inflated and deformed. Configured to act on the non-joined portion to prevent fluid leakage from the non-joined portion ,

By inserting the other end side of the opening auxiliary piece into the bag base, and sealing both side edges that overlap the one side film and the other side film of the synthetic resin film on the front and rear side of the bag base The portion where the other end side of the opening auxiliary piece and the film on the other side of the synthetic resin film on the front and back side overlap is the opening,

The sealed structural chuck includes a pair of base parts made of synthetic resin in the form of a tape fixed to each opposing surface in the opening of the bag base, and projects integrally on the surface of one of the base parts Provided with a female sealing tool composed of a pair of female ridges having a hook-shaped claw section on the inner side surface of the distal end portion, and projecting integrally on the surface of the other base portion, A male sealing tool comprising a pair of male ridges inserted between the female ridges, the two female ridges on one of the bases A sealing protrusion that is integrally provided at an intermediate position of the protrusion, and is press-fitted between both male protrusions of the other base, and the male seal is inserted into the female seal Chat said sealing ridge, together with the two claw portions therebetween are engaged with each other is configured to be press-fitted between the back of the Okagi protrusion by Parts and in that it is configured with at least two rows disposed in spaced in the width direction of the base stand part between the pair of the base portion.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, each chuck portion includes a female ridge on the outer side of the bag base body, out of both female ridges of the female seal. By making the thickness of the joint portion of the base portion with the base portion larger than the thickness of the base portion of the female ridge on the inner side of the bag base, the bending force applied to the base portion is increased by the bag. The outer side of the bag base of the opening is easily opened and the bag base is made easier to transmit to the female ridge on the outer side of the bag base than the female ridge on the inner side of the base. The inside is on the hard open side.

According to a third aspect of the present invention, in addition to the configuration of the second aspect, the shape of the root portion of the female hook ridge on the difficult-to-open side is changed from the tip side of the female hook ridge to the easy opening side. By making the shape curved toward the female ridge ridge side, the thickness of the joint portion with the base portion of the base portion of the female ridge ridge on the outer side of the bag base is set to the inner side of the bag base. The thickness of the joint portion with the base portion of the base portion of the female ridge ridge is increased .

  According to a fourth aspect of the present invention, in addition to the structure according to any one of the first to third aspects, the sealing protrusion includes a head having a shape in which both sides are bulged at a tip portion thereof. The two side surfaces of the part are in contact with each other by pressing the back surfaces of the male and female ridges.

  The feature of the invention described in claim 5 is that, in addition to the configuration of any one of claims 1 to 4, the length of the non-joining portion / the width of the non-joining portion is 4 or more.

According to the hermetically sealed bag for containing fluid with a chuck of the present invention, the bag base is provided with a seal portion with its entire lower end closed,

On the upper end side of the bag base, an extension portion that is longer than the film on the other side is provided on one side of the synthetic resin film on the front and rear surface side that constitutes the bag base. The opening auxiliary piece is overlaid on the folded arrangement, and the overlapping portion between the tip end side of the extension portion and one end side of the opening auxiliary piece is integrated to form a belt-like seal portion. , Forming a non-joining portion that interrupts this, the non-joining portion as the fluid inlet,

The fluid inlet is curved so that the seal portion is pulled toward the center of the bag base as the bag base is inflated and deformed. Configured to act on the non-joined portion to prevent fluid leakage from the non-joined portion ,

By inserting the other end side of the opening auxiliary piece into the bag base, and sealing both side edges that overlap the one side film and the other side film of the synthetic resin film on the front and rear side of the bag base The portion where the other end side of the opening auxiliary piece and the film on the other side of the synthetic resin film on the front and rear surface side overlap is defined as the opening, so that it is separated from the portion other than the opening provided with the sealing structure type chuck. thing will have a closable fluid inlet, the fluid can be injected into the bag without opening the chuck, also the sealing portion of the strip is provided in a portion other than the opening, it interrupts the seal portion because with a non-joined portion in which is made to constitute the fluid inlet, or refill the fluid without opening the chuck during transportation, or can replaced. Furthermore, when the bag is housed in a shape retaining container such as a cardboard box or a wooden box, the fluid can be injected from the fluid inlet without opening the chuck from the upper opening side of the shape retaining container. , Application is expanded.

The sealed structural chuck includes a pair of base parts made of synthetic resin in the form of a tape fixed to each facing surface in the opening of the bag base, and is integrally formed on the surface of one of the base parts. Protruding and provided with a female sealing tool comprising a pair of female ridge protrusions having a hook-shaped claw section on the inner side surface of the distal end portion and projecting integrally on the surface of the other base portion, A male sealing tool having a pair of male ridges inserted between the female ridges, and having both of the two base parts. It is provided with a sealing ridge that is integrally projected at an intermediate position of the female ridge and is press-fitted between both male ridges of the other base, and the male seal is inserted into the female seal By doing so, the both claw portions between the two are engaged with each other and the sealing protrusion is press-fitted between the back surfaces of the male protrusions. The jack unit, by being configured with at least two rows disposed in spaced in the width direction of the base stand part between the pair of the base section, a high pressure resistance with good sealability .

Further, when the pressure in the bag rises, the extension portion is folded back from the opening auxiliary piece in the extension direction, and the chuck slides relative to each other between the base portions constituting the chuck instead of the opening direction. As a result, an external force is applied to the slab, and the pressure resistance is higher.

According to the present invention, as set forth in claim 2, each of the chuck portions is a base of a base portion of the female ridge on the outer side of the bag base, of both female ridges of the female seal. By making the thickness of the coupling portion with the base portion larger than the thickness of the root portion of the female ridge on the inner side of the bag base, the bending force applied to the base portion is increased inward of the bag base. Compared to the female ridge on the side of the bag base, the structure is more easily transmitted to the female ridge on the outer side of the bag base, thereby making the outer side of the bag base of the opening easier to open and the inner side of the bag base difficult to open. By using the side, it is possible to counter the force in the large opening direction from the inside of the bag due to external factors such as expansion due to impact or temperature change.

In the present invention, as described in claim 3, the shape of the root portion of the difficult-to-open side female ridge is formed on the side of the female ridge on the easily open side from the distal end side of the female ridge. The thickness of the joint portion with the base portion of the base portion of the female ridge protrusion on the outer side of the bag base is set to the shape of the female ridge protrusion on the inner side of the bag base. By making the thickness of the joint portion with the base portion of the base portion larger, these manufactures can be molded at the same time with one resin mold, distinguishing the easy open side from the hard open side The chuck can be easily molded.

According to the present invention, as described in claim 4, the sealing protrusion includes a head having a shape in which both sides are bulged at a tip portion thereof, and both side surfaces of the head are the male and female protrusions. The sealing performance of the chuck can be improved by pressing the back surface of the strip so as to be in contact therewith.

According to the present invention, when the length of the non-joining portion / the width of the non-joining portion is 4 or more as described in claim 5, the sealing property of the non-contact portion due to expansion inside the bag is high. It will be a thing.

Hereinafter, an example of a fluid filling bag according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a fluid housing bag D with a sealed structure type chuck according to a first embodiment of the present invention. This bag is made into a bag base 70 by cutting a plastic tube obtained by inflation molding.

Although not shown in the drawing, two films having an appropriate shape that is not cylindrical may be stacked, and a peripheral portion other than an opening to be described later may be used as a sealing portion by heat welding. As the synthetic resin film constituting 70 , various synthetic resin films according to the contents can be used as long as they can be welded. As such a synthetic resin film, for example, a single layer or a multilayer film made of a thermoplastic resin such as a polyolefin resin such as polyethylene or polypropylene, a polyamide or polyvinyl chloride, or a multilayer film including a thermoplastic resin layer and a barrier resin layer Is mentioned.

The bag base 70 is folded into a belt shape in which two upper and lower films 70a and 70b are stacked, a seal portion 76 is provided that closes one end (lower end) of the bag base 70, and an opening 71 is provided on the upper end side. Yes. The bag base 70 is provided with an extension 72 at the end on the opening side, which is longer than the film 70b on the other side on the film 70a on one side of the synthetic resin film on the front and rear surface side constituting the bag base 70 ( As shown in FIG. 2 , an opening auxiliary piece 73 is superposed on the extension 72 so as to be folded back from the tip to form a front and back overlapping portion 74. A band-like seal portion 74 is provided by integrating the overlapping portion with the portion auxiliary piece 73, and the seal portion 74 is formed with a non-joint portion 75 similar to the above-described embodiment that interrupts this ( FIG. 1 ) . The fluid inlet is constituted by the non-joining portion 75.

Various sealing methods such as a hot plate welding device and an ultrasonic welding device can be used for the sealing method of the seal portion 74 , and pressurization of a heat sealer (a sealing mechanism including a pressure member that can be heated by a heater) of a packaging machine. You may form in a desired shape by arrangement | positioning of a member.

As shown in FIG. 4, the width of the seal portion 74 formed on the bag base 70 is set to an appropriate width that can exhibit the necessary welding strength based on the mass of the contents, the material of the film, the internal pressure, and the like. Among these, it is preferable that the length (e) of the non-joining portion / the width (d) of the non-joining portion 75 is in a range satisfying the relationship of 4 or more, preferably 8 or more. By setting the length (e) of the non-joining portion / the width (d) of the non-joining portion 75 to 4 or more, the fluid filled in the bag can be prevented from leaking from the non-joining portion 75 .

The size of the distance L from the opening end 45 of the seal portion 74 is preferably 0 to 70 mm, and more preferably 3 to 20 mm. The size of the distance L of the open end or these seal portions 74 may be any 0 mm, the insertion of the nozzle when more than 3mm becomes easier. On the other hand, if the distance L from the opening end 45 of the seal portion 74 exceeds 70 mm, the internal volume inside the bag becomes small, which is uneconomical.

Further, the non-joint portion 75 in the seal portion 74 is not welded to the film 70b on the other side and the opening auxiliary piece 73 . The width (d) of the non-joined portion 75 is 3 to 18 mm, preferably 4 to 8 mm, and preferably has a strip shape. The width (d) of the non-joint portion 75 is set to 3 to 18 mm. When the width is less than 3 mm, the fluid is efficiently filled when the fluid filling nozzle is inserted and the fluid is filled / discharged.・ Because it cannot be discharged. On the other hand, if the width exceeds 18 mm, the filled fluid is likely to leak. Further, by forming the non-joint portion 75 in a band shape, the fluid filling nozzle can be easily inserted into the bag.

The non-joining portion 75 is formed such that the distance (c1, c2) from the side end portion of the bag base 70 is 10 mm or more, preferably 15 mm or more. This is because if the position of the non-joint portion 75 on the seal portion 74 is close to the side end portion of the bag base body 70 , it is difficult to prevent leakage of the filled fluid.

When filling the fluid into the bag interior, with the expansion deformation of the bag body 70, the sealing portion 74 is curved so as to be pulled toward the center of the bag body 70, the extension piece 73 and opening aids on the other side of the film 70b 73 acts on the synthetic resin films constituting 73, and prevents leakage of fluid from the non-joining portion 75 . Distance from the side edge of the bag body 70 (c1, c2) is less than 10 mm, the force to press in the direction of contact of the synthetic resin film to each other due to expansion deformation of the bag body 70, a shortage in the non-bonding portion 75.

The direction of the non-joining portion 70 may be inclined at an appropriate angle in addition to the direction orthogonal to the seal portion 74. Since the length (e) of the non-joining portion 75 can be secured long by providing it in a direction inclined with respect to the seal portion 74, the length (e) of the non-joining portion 75 / the width of the non-joining portion 75.
It becomes easy to set the value of (d) to 4 or more, and leakage of the filled fluid can be prevented.

Then, after filling the fluid into the bag interior, with the expansion deformation of the bag body 70, the sealing portion 74 is curved so as to be pulled toward the center of the bag body 70,且, the opening end side of the seal 74 , Get hungry. At this time, in the non-bonding portion 75 , a force that presses the films in the direction in which they are in close contact with each other acts. As a result, in the fluid containing bag of the present invention, a part of the filled fluid and contents do not leak through the non-joint portion 75 .

As described above, the fluid storage bag can prevent leakage of fluid or contents despite the structure having no spigot, and the non-joining portion 75 is welded. Therefore, even during the transportation, by simply inserting the fluid filling nozzle into the non-joining portion 75 , the required fluid can be easily additionally filled or the fluid can be discharged and replaced.

The opening auxiliary piece 73 is inserted into the bag base 70 at the other end, and both side edges overlap with the film 70a on the one side and the film 70b on the other side of the synthetic resin film on the front and rear side of the bag base 70. By sealing 73a, 73b (shown in FIG. 3) , the portion where the other end side of the opening auxiliary piece 73 and the film 70a on one side of the synthetic resin film on the front and rear surface side of the bag base 70 overlap is opened upward. Part 71 is used.

  A sealing structural chuck 42 having a pair of chuck portions 22, 22 is fixed between the pair of tape-like base portions 20, 21, and the opening 71 is sealed by the chuck 42. And can be opened.

Although not shown in the drawing , the bag base 70 may be formed by stacking two appropriately shaped films that are not cylindrical, and forming a peripheral portion other than the opening described later as a sealing portion by heat welding. As the synthetic resin film constituting the bag base 70 , various synthetic resin films according to the contents can be used as long as they can be welded. As such a synthetic resin film, for example, a single layer or a multilayer film made of a thermoplastic resin such as a polyolefin resin such as polyethylene or polypropylene, a polyamide or polyvinyl chloride, or a multilayer film including a thermoplastic resin layer and a barrier resin layer Is mentioned.

The structure of the sealed chuck 42 includes a pair of tape-like base parts 20 and 21 and a pair of chuck parts 22 and 22 arranged in parallel with each other .

The two chuck portions 22 and 22 have the same structure, and as shown in FIG. 6 , the other base portion 21 is provided in a female sealing tool 25 that is integrally projected on the surface of one base portion 20. It is sealed by inserting a male sealing tool 28 projecting integrally therewith.

  The female seal 25 includes a pair of female ridges 24a and 24b that protrude from the base portion 20 and have hook-shaped claw portions 23 having a hook-like cross section on the inner side surface of the distal end portion. The male sealing tool 28 is integrally projected on the surface of the other base part 21 and has hook-shaped claw parts 26 and 26 having a hook-like cross section on the outer surface of the tip part. The female hook protrusions 24a and 24b are provided. It has a pair of male ridges 27, 27 inserted between them.

Further, a sealing ridge 29 that is press-fitted between the male ridge ridges 27, 27 of the other base portion 21 is integrally projected at an intermediate position between the both female ridge ridges 24 a, 24 b of one base portion 20. is set, the sealing protrusion 29 is the Okagi ridges with are engaged with each other and both claw portions 23 and 26 between them by inserting a Ofutomegu 28 Mesufutomegu 25 27 and 27 are press-fitted between the back surfaces 27a and 27a.

  The sealing ridge 29 is provided with a head portion 29a having a shape in which both sides are bulged at the tip, and both side surfaces of the head portion 29a press the back surfaces 27a, 27a of the male male ridges 27, 27. They are in line contact with each other, and the gas-liquid tightness is maintained.

In addition, the cross-sectional shape of the root portion of one female ridge ridge 24a of the female sealing tool 25 is formed into a taper shape that increases in thickness toward the base 20 side, whereby the female ridge ridge 24a is formed. The bending force on the protruding base 20 is easily transmitted to the female ridge 24a . Therefore, as shown in FIG. 7 , the female ridge 24a is easily bent by bending the base 20 outward. The hook engaging portions 23 and 26 which are bent in a direction away from the male protrusion 27 and can be easily engaged with each other constitute an easy opening side engaging portion.

On the other hand, the base portion of the other female ridge ridge 24b has a shape curved toward the one female ridge ridge 24a side in the same manner as the inner surface as its outer surface reaches the base portion 20. The base portion has an arcuate portion 30 whose thickness a ( shown in FIG. 6 ) is formed to be thicker than the thickness b of the base portion 20 and whose cross-sectional shape is formed in an arc shape. For this reason, when a bending force in the opening direction acts on the base part 20, as shown in FIG. 7 , the base part 20 bends at a position outside the root part of the female ridge 24b, and the bending force is A difficult-to-open side engaging portion that does not easily transmit to the strip 24b but does not easily disengage the claw portions 23 and 26 that are engaged with each other is formed.

  Each of the chuck portions 22 and 22 having the above-described structure is integrally projected with respect to the base portion 20 in a state in which the female ridge ridges 24b constituting the difficult-to-open engagement portion are directed to the same side. Yes.

  The opening and closing of the sealing structure type chuck 42 is not shown in the drawing, but it is preferable to open and close the chuck by fitting a slider having a substantially U-shaped cross section to the outside and sliding it. By using this slider, the opening / closing operation of the chuck can be easily and easily performed.

The hermetic structure type chuck 42 is fixed so that the female hook ridge 24 b side constituting the hard-to-open side engaging portion of both chuck portions 22, 22 faces the inner side of the bag base 70. Further, the base parts 20 and 21 are both formed on the opening auxiliary piece 73 and the film 70a on one side of the synthetic resin film on the front and rear surface sides of the bag base, both edges of the back surface constituting the inner surface of the opening. On the other hand, it is fixed by welding.
Further, a body portion is formed between the sealing chuck 42 and the seal portion 76.

Although not shown in the drawing, this sealed structural fluid holding bag D with a chuck has an upper portion of the shape retaining container when used in a shape retaining container of an upper opening type such as a cardboard box or a wooden box. Fluid can be injected from the opening, and rational liquid injection work is possible.

Further, in the sealed structure type chucked fluid accommodation bag D of this embodiment , when an internal force is increased by applying an external force in a state where the fluid is contained therein, as shown in FIG. The opening auxiliary piece 73 that is overlapped in the arrangement in which the tip is folded back is folded back in the extending direction of the extension portion 72, and the planes of both the base portions 20 and 21 are opposite to each other. The force AB in the direction of sliding to a large force acts, the moment in the direction of separating the opposing surfaces of the two is extremely small, and the opening direction acting from the inside of the opening due to the shear stress on both chuck portions 22, 22 It will be against the power.

  At this time, on the female sealing tool 25 side, the shear stress that combines the two pairs of female ridge ridges and the two sealing ridges 29 constituting the pair of female sealing tools, the male sealing tool 28 side In this case, the two pairs of male ridges constituting the pair of male seals 28 are countered by the combined shear stress, and the moment in the opening direction acts greatly on the difficult-to-open side. A sealing force can be obtained and sealing performance is maintained.

In the above-described embodiment , the bag base 70 is folded into a belt-like shape in which two upper and lower films 70a and 70b are overlapped, and an opening 71 that can be opened and closed by the sealed structural chuck 42 is provided at one end thereof. However, as shown in FIG. 10 , the two upper and lower films 70a and 70b may be folded so that a so-called gusset portion 70c is provided.

  The contents stored in this bag include foods such as seafood, meat, vegetables, fruits, prepared dishes, liquid foods, plants such as fresh flowers and cut flowers, as well as pharmaceuticals and industrial raw materials that should be stored in a certain atmosphere. It is done. Among them, fresh food such as live fish is preferable.

  When containing live fish, it is preferable to use water in which a large amount of oxygen is dissolved by injecting ultrafine air having a diameter of 50 microns or less or bubbles of oxygen with a microbubble generator. .

  Moreover, it is also possible to put only the fluid without putting the solid content, for example, it is possible to use a cushioning material containing air. In this case, when the function as a cushioning material is no longer necessary, the air can be removed and stored, and the cushioning material can be refilled as necessary.

  In addition, among the fluid filled in the bag, as the gas, for example, an inert gas such as nitrogen or carbon dioxide is used for the purpose of preventing oxidation of food or the like. Moreover, when aiming at maintaining the freshness of live fish or the like, oxygen or air with a high oxygen concentration is used.

  Further, among the fluids to be filled, examples of the liquid include water, salt water, seawater for maintaining freshness and flavor in the case of live fish, and various cooking liquids in the case of prepared dishes. Moreover, you may fill with the fluid in which these gas liquids were mixed. Furthermore, when maintaining the freshness of plants such as fresh flowers and cut flowers, vegetables, fruits and the like, an ethylene gas absorbent or the like can be allowed to coexist in the bag.

This fluid can be filled together with the contents from the opening of the chuck 42 that is opened when the contents are accommodated, or after the contents 42 are filled and the chuck 42 is closed, the non- fluid provided in the seal portion 74 is filled. It is also possible to fill from the joint 75 using a fluid filling nozzle.

  The bag is used as an inner bag of a so-called back-in box in which the inner bag is put in a protective outer box such as a cardboard box, etc. You can also.

It is a top view which shows the outline | summary of an example of implementation of the fluid accommodation bag with a sealing structure type | formula chuck | zipper which concerns on this invention. It is an expanded sectional view of the opening part same as the above . It is the aa line half sectional view in FIG. It is sectional drawing which shows the seal part in the Example shown in FIG . It is a partial expanded sectional perspective view which shows the sealing structure type chuck | zipper part in the Example shown in FIG. It is a partial expanded sectional view which shows the sealing structure type chuck same as the above . It is an expanded sectional view which shows the open state of the easy open side of a sealing structure type chuck . It is an expanded sectional view which shows the open state of the hard open side of a sealing structure type chuck . It is an expanded sectional view which shows the state of the opening part when an internal pressure rises in the bag of the Example of FIG . It is a perspective view which shows the modification of the Example shown in FIG . It is a longitudinal cross-sectional view which shows an example of the conventional synthetic resin chuck . It is a longitudinal cross-sectional view which shows the open state of the chuck | zipper . It is a longitudinal cross-sectional view which shows the other example of the conventional chuck | zipper . It is a longitudinal cross-sectional view at the time of the external force of an opening direction acting from the inner side of a bag at the time of using the same chuck for the opening part of a bag .

D Sealed fluid holding bag with chuck 20, 21 Base part 20a, 20b Side edge rear face 21a, 21b Side edge rear face 22 Chuck part 23 Claw part 24a, 24b Female scissors 25 Female seal 26 Claw portion 27 Male rod ridge 27a Back surface 28 Male sealing tool 29 Sealing ridge 29a Head 30 Arc-shaped portion 70 Bag base body 70a One side film 70b of the front and rear surface side synthetic resin film Front and rear surface side synthetic resin Film 70c on the other side of the film Side film 71 Opening portion 72 Extension portion 73 Opening portion auxiliary pieces 73a and 73b Side edge portion 74 Front and back overlapping portions 75 Non-joining portion 76 Seal portion

Claims (5)

It has a cylindrical bag base made of a synthetic resin film, and is provided with a synthetic resin hermetically sealed chuck in an arrangement crossing the opening at the opening of the bag base, and another opening / closing at a portion other than the opening In a fluid housing bag with a sealed structure type chuck having a flexible fluid inlet,
The bag base is provided with a seal portion that closes the entire lower end thereof,
On the upper end side of the bag base, an extension portion that is longer than the film on the other side is provided on one side of the synthetic resin film on the front and rear surface side that constitutes the bag base. The opening auxiliary piece is overlaid on the folded arrangement, and the overlapping portion between the tip end side of the extension portion and one end side of the opening auxiliary piece is integrated to form a belt-like seal portion. , Forming a non-joining portion that interrupts this, the non-joining portion as the fluid inlet,
The fluid inlet is curved so that the seal portion is pulled toward the center of the bag base as the bag base is inflated and deformed. Configured to act on the non-joined portion to prevent fluid leakage from the non-joined portion ,
By inserting the other end side of the opening auxiliary piece into the bag base, and sealing both side edges that overlap the one side film and the other side film of the synthetic resin film on the front and rear side of the bag base The portion where the other end side of the opening auxiliary piece and the film on the other side of the synthetic resin film on the front and back side overlap is the opening,
The sealed structural chuck includes a pair of base parts made of synthetic resin in the form of a tape fixed to each opposing surface in the opening of the bag base, and projects integrally on the surface of one of the base parts Provided with a female sealing tool composed of a pair of female ridges having a hook-shaped claw section on the inner side surface of the distal end portion, and projecting integrally on the surface of the other base portion, A male sealing tool comprising a pair of male ridges inserted between the female ridges, the two female ridges on one of the bases A sealing protrusion that is integrally provided at an intermediate position of the protrusion, and is press-fitted between both male protrusions of the other base, and the male seal is inserted into the female seal Chat said sealing ridge, together with the two claw portions therebetween are engaged with each other is configured to be press-fitted between the back of the Okagi protrusion by The parts, at least two rows sealing structure type fluid containment with zipper made as a feature in that it is configured for placement in a state spaced in the width direction of the base stand part between the pair of the base portion bag. Each of the chuck portions has a thickness of a coupling portion with a base portion of a base portion of the female ridge on the outer side of the bag base, of both female ridges of the female sealing tool, and the thickness of the bag base. By making it larger than the thickness of the base portion of the inner female ridge, the bending force applied to the base portion is larger than that of the inner ridge of the bag base. 2. The structure in which the outer side of the bag base of the opening is made easy to open and the inner side of the base of the bag is made difficult to open by making the structure easy to transmit to the female ridges.
A fluid containing bag with a sealed structure type chuck as described in 1.
The shape of the root portion of Mesukagi projection of the flame opening side, by a is curved shape Mesukagi ridge side of the from the front end portion of the female hook projections easy open side, the bag body outer The thickness of the joint portion with the base portion of the base portion of the female female ridge on the side is compared with the thickness of the joint portion with the base portion of the base portion of the female ridge on the inner side of the bag base. The fluid housing bag with a sealed structure type chuck according to claim 2, wherein the bag is made larger . The sealing protrusion is provided with a head having a shape in which both sides are bulged at a tip portion thereof, and both side surfaces of the head are in contact with each other by pressing the back surfaces of the male and female protrusions. Item 4. The fluid accommodation bag with a sealed structure type chuck according to any one of Items 1 to 3 . The length of the said non-joining part / the width | variety of the said non-joining part is four or more, The bag for fluid accommodation bags with a sealing structure type | formula of any one of Claims 1-4 .

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