JP4972667B2 - Free-standing bag with chuck - Google Patents

Description

  The present invention relates to a self-supporting bag with a chuck, and more particularly to a self-supporting bag with a chuck in which an opening for filling and an opening for extraction are provided at the opening of the bag.

  Since the self-supporting bag with a chuck has a structure in which the bottom is closed, the contents have to be filled from the opening side provided with the chuck. However, if the contents are filled from the opening provided with the chuck, the contents may adhere to the chuck and the chuck may become clogged. Therefore, the female chuck is joined to the inner surface of one sheet constituting the bag. The extending portion is integrally formed on the female chuck, the hot melt adhesive resin portion provided on the surface of the extending portion is joined to one inner surface so as to be easily peeled, and the back surface of the extending portion and the other After filling the contents from between the sheets, the back surface of the extended portion and the other sheet were heat-sealed and joined, and the open ends of both sheets were heat-sealed and closed. (For example, refer to Patent Document 1).

  Further, as a self-supporting bag with a chuck, a partition sheet is interposed between a pair of side sheets, a chuck and an easily peelable joint are formed between the partition sheet and one side sheet, and the upper end of the partition sheet There was one that was difficult to peel and join to the upper end of the other side sheet (for example, see Patent Document 2).

JP 2005-67712 A Japanese Patent No. 3020834

  However, since the opening end of the bag is heat-sealed in the above-described bag of Patent Document 1, it is necessary to cut off the heat-sealed portion above the chuck when opening the bag. Even if it is formed so that it can be easily separated by putting a notch or a perforation in the cut-out portion, it may be difficult for a weak child or an elderly person to open the bag, and there is a problem that a scissors and a knife are required. There is also a problem that the separated part becomes garbage at that time.

  Moreover, in the bag of patent document 2, since the opening edge part of a bag is not heat-sealed, a non-joining part is formed between the upper part of one side sheet and the upper part of the other side sheet. Although both sides of the sheet are grasped by inserting a finger into the sheet and the sheets on both sides can be pulled apart, the partition sheet and the other are filled after the contents are filled into the bag by a general-purpose automatic filling machine. When the position of heat sealing is shifted from the set position when the side sheet is bonded by the hard-to-peel joint, the thermal adhesive layer on the upper back side of one side sheet is separated from the partition sheet and the other side sheet. There was a possibility that it would be difficult to open because it was heat sealed and a non-joined part could not be formed.

  Therefore, the present invention is equipped with an upright type chuck that can fill the bag without adhering the contents to the chuck while maintaining the necessary airtightness and hermeticity, and can be easily sealed and opened after filling. The purpose is to provide free-standing bags.

In order to achieve the above object, the self-supporting bag with a chuck of the present invention comprises a pair of side sheets formed of a composite film having a non-adhesive layer having a high melting point on the front side and a heat bonding layer having a low melting point on the back side, and a bottom sheet. A partition sheet interposed on the opening side between the pair of side sheets, a chuck disposed between a lower part of the partition sheet and one side sheet, and a partition sheet on the upper side from the chuck An easily peelable joining portion that joins the side sheet, and an easily peelable joining portion that joins the upper part of the partition sheet and the other side sheet, and the partition sheet and one side sheet by the easily peelable joining portion. In the state of joining, an opening for filling is formed between the partition sheet before joining by the hard-to-peel joint and the other side sheet, and after filling the contents in the bag, the partition sheet and the other side face In a state where the filling opening is sealed by joining the sheet with the hard-to-peel joint, the easy-release joint formed by joining the partition sheet and one of the side sheets is peeled to form an extraction opening. In the self-supporting bag with a chuck in which the opening for extraction is sealed by the chuck so that the opening can be opened and closed, the upper end of the one side sheet is placed on the upper part of the one side sheet. The folding sheet is folded back to the inner surface side of the bag up to a lower position than the upper end of the partition sheet, and the opposed thermal adhesive layers are joined together to form a folded portion, and the upper end of the easily peelable joint is below the folded portion. The lower end of the hard-to-peel joint is disposed above the lower end of the easy-peel joint and below the upper end of the easy-peel joint, and the upper end of the hard-peel joint is above the upper end of the easy-peel joint Each It is characterized in that it is location.

The front Stories can either one of the upper end of the upper end and the upper end of the other side sheet one side sheets extending from the other of the upper end providing a step in the open top, further wherein one side surface sheet A bead may be formed at the upper end of at least one of the upper end of the sheet and the upper end of the other side sheet. The pair of side sheets and the bottom sheet may be formed by a single continuous sheet, and the bottom surface portion may be woven inside, and the sheet is a bag inner layer made of a synthetic resin having a low melting point. And a bag outer surface layer made of a synthetic resin having a high melting point. Furthermore, it is preferable that a shape holding member is provided at the upper end of at least one of the upper end of the one side sheet and the upper end of the other side sheet. It can also be formed with a shape-retaining tape.

  According to the self-supporting bag with a chuck of the present invention, the upper inner surface of one side sheet can be made to be a non-adhesive layer by folding back the upper end of one side sheet. Accordingly, when the partition sheet and the other side sheet are joined by the hard-to-peel joint after the contents are filled in the bag by a general-purpose automatic filling machine or the like, the position for heat sealing is shifted from the set position. In some cases, the non-adhesive layer can reliably form a non-joined portion on the top of the bag. Further, the folded end portion of the one side sheet is disposed at a lower position than the upper end portion of the partition sheet, and the upper end portion of the easily peelable joint portion is disposed below the folded end portion. , When opening the bag, by easily grasping the opening end of one side sheet and the opening end of the other side sheet, the easy peeling joint between one side sheet and the partition sheet is easily peeled off. Thus, the opening for taking out the contents can be easily opened. Therefore, it is not necessary to cut off the upper portion of the chuck, the bag can be easily opened, dust such as chips is not generated, and the contents can be filled in the bag without adhering to the chuck. In particular, the positional relationship of the hard-to-peel joint with respect to the easy-peel joint is set so that the hard-peel joint has an upper opening side. There is no possibility that the easily peelable joint part peels from the inner side, and the physical force from the outside of the bag, that is, the force to open the opening for extraction, does not peel the difficultly peelable joint part. The easily peelable joint can be easily peeled off.

It is sectional drawing before the contents filling of the self-supporting bag with a chuck | zipper which shows the 1st form example of this invention. It is sectional drawing of the self-supporting bag with a chuck | zipper at the time of similarly filling the contents. It is sectional drawing of the self-supporting bag with a chuck | zipper after the same content filling. It is sectional drawing of the self-supporting bag with a chuck | zipper at the time of taking out the content similarly. It is sectional drawing of the self-supporting bag with a chuck | zipper at the time of resealing similarly with a chuck | zipper. It is a front view of the self-supporting bag with a chuck | zipper similarly. It is sectional drawing of the self-supporting bag with a chuck | zipper which shows the 2nd form example of this invention. It is explanatory drawing of the self-supporting bag with a chuck | zipper at the time of taking out the content similarly. It is sectional drawing of the self-supporting bag with a chuck | zipper which shows the 3rd form example of this invention.

  1 to 6 are views showing a first embodiment of a self-supporting bag with a chuck according to the present invention. The self-standing bag 1 with a chuck shown in the present embodiment is an upright type bag having a gusset at the bottom, and is provided at the lower ends of the pair of side sheets 2 and 3 and the side sheets 2 and 3. A bottom sheet 4 serving as a bottom and a partition sheet 5 interposed on the opening side between the pair of side sheets 2 and 3, and between the lower end of the partition sheet 5 and one side sheet 2. The chuck 6 is provided.

  The side sheets 2 and 3 and the bottom sheet 4 are formed of multilayer synthetic resin films (sheets) each having surface layers 2a, 3a and 4a and back surface layers 2b, 3b and 4b having different melting points. 2a, 3a and 4a are non-adhesive layers made of a nylon film having a high melting point, and the back layers 2b, 3b and 4b are made of a heat adhesive layer made of a polyethylene film having a low melting point. The partition sheet 5 is formed of a multilayer synthetic resin film (sheet) including an easy peel resin layer 5a and a heat bonding resin layer 5b, and the easy peel resin layer 5a is opposed to the back surface layer 2b of one side sheet 2. Arranged. A female chuck member 6a and a male chuck member 6b constituting the chuck 6 are provided on the lower end portion of the easy peel resin layer 5a of the partition sheet 5 and the back surface layer 2b of the side sheet 2 opposite to the easy peel resin layer 5a. Are bonded in the width direction of the self-supporting bag 1 with a chuck in a state of difficult peeling.

  Further, the upper end portion of one side sheet 2 is folded back toward the inner surface of the bag, and the back surface layers 2b are heat-sealed and joined in a hardly peeled state to form a folded portion 2c. The upper inner side surface of the side sheet 2 is a surface layer 2 a (non-adhesive layer), and the folded end portion 2 d of the folded portion 2 c is disposed below the upper end portion of the partition sheet 5.

  As shown in FIG. 1, in the state before filling the contents, the sheets 2, 3, 4 are side edges of the back surface layer 4 b of the back surface layers 2 b, 3 b of the side sheets 2, 3 and the bottom surface sheet 4. And the side edges of the back surface layers 2b and 3b of the side sheets 2 and 3 are joined together in a difficult-to-peel state to form a bag, and the partition sheet 5 The easy peel resin layer 5a and the back layer 2b of the one side sheet 2 are joined in an easily peeled state at a position above the chuck 6 and below the folded end 2d of the folded portion 2c. It is a peel joint 7. On the other hand, the other side sheet 3 and the partition sheet 5 form the opening 8 for filling the contents in an unbonded state before filling the contents.

  As shown in FIG. 2, when the contents 9 are filled in the bag, the contents filling opening 8 between the other side sheet 3 and the partition sheet 5 is expanded, and a predetermined amount is obtained. 3, the upper half of the heat-adhesive resin layer 5b of the partition sheet 5 and the back surface layer 3b of the other side sheet 3 facing the heat are heated as shown in FIG. The self-standing bag with a chuck 1 filled with the contents 9 and in a sealed state is formed by being sealed and joined in a hardly peeled state and becoming a difficultly peeled joint 10 that closes the opening 8 for filling the contents. The

  At this time, the lower end portion 10 a of the hard-to-peel joint portion 10 is disposed above the lower end portion 7 a of the easy-peel joint portion 7 and below the upper end portion 7 b of the easy-peel joint portion 7. The upper end portion 10 b is disposed above the upper end portion 7 b of the easily peelable joint portion 7 and is arranged in the same manner as the upper edge of the partition sheet 5. Moreover, since the surface which opposes the back surface layer 3b of the other side sheet 3 and the upper part of the easy peel resin layer 5a of the partition sheet 5 is the surface layer 2a of the one side sheet 2, the folded portion 2c is heat-sealed. The non-joining part 11 is formed in the opening edge part of the self-supporting bag 1 above the easily peelable joining part 7 instead.

  Thus, when opening the bag in which the opening is sealed by the easy peel joint 7 and the hard peel joint 10, it is formed between the upper part of one side sheet 2 and the upper part of the other side sheet 3. In the state where the finger is inserted into the non-joined portion 11, when the upper end portions of the both side sheets 2 and 3 are grasped and the both side sheets 2 and 3 are pulled apart, as shown in FIG. The bonded partition sheet 5 and the one side sheet 2 are peeled off, and a content extraction opening 12 is formed between the partition sheet 5 and the one side sheet 2, and from the content extraction opening 12. The contents 9 can be taken out. At this time, since the partition sheet 5 and the other side sheet 3 are completely joined by the hard-to-peel joint 10, the partition sheet 5 and the other side sheet 3 do not peel off. After the necessary amount of content is taken out from the content extraction opening 12, the content extraction opening 12 can be sealed in a state where it can be opened and closed by the chuck 6, as shown in FIG.

  According to the self-supporting bag with a chuck 1 of the present embodiment formed as described above, the required peelability is ensured by the easy peel joint portion 7 and the hard peel joint portion 10 after filling the contents, and the unsealed bag 1 is opened. In this case, it is not necessary to cut the upper end of the self-supporting bag 1 with a chuck with a scissors or to cut off from a cut line provided in advance, and the upper part of one side sheet 2 and the other side sheet 3 need not be cut. By simply grasping and opening the upper part, the easily peelable joint part 7 is peeled off and the contents takeout opening part 12 is formed, so that no dust is generated at the time of opening and the non-joint part 11 is formed at the opening end. Since it is easy to grasp the opening portion, even a weak child or an elderly person can easily open it.

  Further, since the non-joining portion 11 is formed by the folded structure of the upper end portion of the one side sheet, there is no risk of increasing the cost, and the partition is formed after the contents are filled in the bag by an automatic filling machine or the like. When joining the sheet and the other side sheet with a hard-to-peel joint, the non-adhesive layer ensures that the non-joined part is placed on the top of the bag even if the heat-sealing position deviates from the set position. Therefore, the yield can be improved. Further, the folded end 2d of the folded portion 2c is disposed at a position lower than the upper end of the partition sheet 5, and the upper end 7b of the easily peelable joining portion 7 is disposed below the folded end 2d. , When opening the bag, by easily grasping the opening end of one side sheet and the opening end of the other side sheet, the easy peeling joint between one side sheet and the partition sheet is easily peeled off. Thus, the opening for taking out the contents can be easily opened. Further, by forming the folded portion 2c, this portion can be easily grasped by the fingertip, and the unsealing property can be further improved. In addition, by forming the bead 3c on the upper end of the other side sheet 3, the upper end part of the other side sheet 3 can be easily grasped, so that the openability of the self-standing bag with chuck 1 can be further improved. Can do.

  Further, since the opening of the self-supporting bag with chuck 1 is divided by the partition sheet 5 into the opening 8 for filling the contents and the opening 12 for taking out the contents, the contents 9 are put on the chuck 6 when the contents 9 are filled. Adhesion can be avoided, the chuck 6 can be used well after opening, and the appearance is good. Moreover, since the opening / closing process of the chuck 6 is not required when filling the contents 9, the process of filling the contents 9 can be rationalized and the speed can be increased. Further, by using a conventional automatic filling machine, the contents 9 can be filled into the self-supporting bag 1 with a chuck, and the cost can be reduced.

  Further, the lower end portion 10a of the hard-to-peel joint portion 10 is disposed above the lower end portion 7a of the easy-peel joint portion 7, and the upper portion 7b of the easy-peel joint portion 7 Since the upper end portion 10b is arranged and there is a step between the easily peelable joint portion 7 and the hardly peelable joint portion 10 across the partition sheet 5, the self-standing bag 1 with a chuck filled with the contents 9 is horizontally packed in cardboard or the like. When a physical force or internal pressure is applied to the easy peel joint 7 and the hard peel joint 10 from the inside of the bag during transportation, the force from the inside of the bag is the lower end of the hard peel joint 10. Since it concentrates on 10a, there is no possibility that the easy peeling joint part 7 may peel from the inner side of a bag. On the other hand, when opening the bag, since the upper end portion 7b of the easy peel joint portion 7 is located below the upper end portion 10b of the hard peel joint portion 10, the force at the time of opening the easy peel joint portion 7 Since it concentrates on the upper end part 7b of this, the easy peeling junction part 7 can be peeled easily.

  FIGS. 7 to 9 show other embodiments of the present invention. Components that are the same as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The self-standing bag 21 with a chuck according to the second embodiment of the present invention shown in FIGS. 7 and 8 is formed by thermally fusing the shape holding tape 22 to the heat bonding resin layer 5b of the partition sheet 5 in the bag width direction. The shape-retaining tape 22 is formed of a member having moderate flexibility and shape-retaining properties. For example, a tape-shaped tape made of polyethylene as a main material and molecularly arranged in a uniaxial direction may be used. it can. By providing such a shape-retaining tape 22 in the opening, as shown in FIG. 8, when the contents 9 are taken out from the self-supporting bag 21 with a chuck, the portion provided with the shape-retaining tape 22 is kept V-shaped. The contents 9 can be taken out little by little along the side sheet 3 opened in a V shape, and only the necessary amount can be taken out well without the contents 9 being scattered.

  A self-supporting bag 31 with a chuck according to a third embodiment of the present invention shown in FIG. 9 is provided with a step by projecting the upper end of the other side sheet 3 upward from the upper end of one side sheet 2. The upper end portion of the sheet 2 is folded inward to form a folded portion 2 c, and a bead 3 c is formed at the upper end portion of the other side sheet 3. Further, a through-hole 3d is formed in a portion protruding above the other side sheet 3 so that the self-standing bag 31 with a chuck filled with the contents 9 can be suspended and displayed. In the present embodiment, the shape holding tape 32 is included in the folded portion 2 c provided at the upper end portion of the one side sheet 2.

  As a result, in addition to displaying the product upright, it can be hung and displayed, and a folded portion 2c is formed at the upper end of one side sheet 2, and a ball is formed at the upper end of the other side sheet 3. Since the edge 3c is formed, the upper end of the side sheet can be reinforced, and the upper end of the other side sheet 3 protrudes upward from the upper end of the one side sheet 2. Therefore, it is easy to grasp the upper parts of the side sheets 2 and 3.

  The present invention is not limited to the case where the male chuck member is joined to the partition sheet and the female chuck member is joined to the one side sheet, as in the above-described embodiments. The chuck member may be one in which a male chuck member is joined to one side sheet. In addition, the side sheet and the partition sheet are not limited to those obtained by laminating a polyethylene film and a nylon film, and may be provided with a surface layer and a back surface layer having different melting points, such as polypropylene, polyester, vinyl chloride, and vinylon. May be used, and aluminum foil may be laminated.

  DESCRIPTION OF SYMBOLS 1 ... Self-supporting bag with a chuck, 2, 3 ... Side sheet, 4 ... Bottom sheet, 2a, 3a, 4a ... Surface layer, 2b, 3b, 4b ... Back surface layer, 2c ... Folding part, 2d ... Folding end part, 5 ... Partition sheet, 5a ... easy peel resin layer, 5b ... thermal bonding resin layer, 6 ... chuck, 6a, 6b ... chuck member, 7 ... easy peel joint, 8 ... content filling opening, 9 ... content, 10 ... hard-to-peel joint, 7a, 10a ... lower end, 7b, 10b ... upper end, 11 ... joined part, 12 ... opening for taking out contents, 21, 31 ... self-standing bag with chuck, 22, 32 ... shape retention tape

Claims (7)

A pair of side sheets formed of a composite film having a non-adhesive layer with a high melting point on the front side and a thermal adhesive layer with a low melting point on the back side, a bottom sheet, and an opening between the pair of side sheets A partition sheet, a chuck disposed between the lower part of the partition sheet and one side sheet, an easily peelable joint for joining the partition sheet on the upper side of the chuck and the one side sheet, and the partition sheet A partition before joining by the hard-to-peel joint in a state in which the partition sheet and one side sheet are joined by the easy-peel joint A filling opening is formed between the sheet and the other side sheet, and after filling the contents in the bag, the partition sheet and the other side sheet are joined together by a hard-to-peel joint, and the filling opening is formed. In the sealed state, the easy-release joint formed by joining the partition sheet and one side sheet peels to form an extraction opening, and after the easy-release joint is peeled off, the chuck uses the chuck to remove the extraction opening. In the self-supporting bag with a chuck that is sealed so that the part can be opened and closed, the upper end of the one side sheet is folded back to the bag inner surface side to a position below the upper end of the partition sheet, Opposing thermal adhesive layers are joined together to form a folded portion, the upper end portion of the easily peelable joint portion is disposed below the folded portion, and the lower end portion of the difficult peel joint portion is the lower end of the easily peelable joint portion. upwardly and downwardly from the upper end of the easy peeling junction from section, the upper end portion of the flame peeling junction zipper self-standing bag according to claim Rukoto respectively disposed above the upper end of the easy peeling joint. 1 Symbol with mounting chucks claims, characterized in that a step to either open upper one of the upper end extending from the other of the upper end of the upper end of the upper end and the other side sheet side sheet of one Free-standing bag. The self-supporting bag with a chuck according to claim 1 or 2 , wherein a bead is formed at an upper end of at least one of an upper end of the one side sheet and an upper end of the other side sheet. The self-standing with a chuck according to any one of claims 1 to 3 , wherein the pair of side sheets and the bottom sheet are formed by a single continuous sheet, and the bottom part is woven inward. bag. The sheet is a bag inner surface layer made of low melting point synthetic resin, according to any one of claims 1 to 4, characterized in that a laminated sheet having a bag outer surface layer made of high melting point synthetic resin Free-standing bag with chuck. The chuck according to any one of claims 1 to 5 , wherein a shape holding member is provided on at least one of an upper end portion of the one side sheet and an upper end portion of the other side sheet. Free-standing bag with. The self-supporting bag with a chuck according to claim 6 , wherein the shape holding member is a shape holding tape whose main material is polyolefin resin.

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