JP6445304B2 - Packaging bag with zipper - Google Patents

Description

  The present invention relates to a packaging bag with a chuck in which a chuck portion is provided inside each of the front film and the rear film facing each other in the vicinity of the opening, and the opening can be opened and closed by contact and separation between the chuck portions. It is related with the packaging bag with a chuck | zipper which added shape and improved the shape maintenance function.

  Conventionally, a packaging bag with a chuck has been proposed in which a chuck portion is provided inside each of the front film and the rear film facing each other in the vicinity of the opening, and the opening can be opened and closed by contacting and separating the chuck portions (for example, (See Patent Document 1).

  The chuck portion of the packaging bag with a chuck includes a male side chuck tape provided with a male side band-like fitting portion having a male side occlusion portion, and a pair of female side occlusion portions that can be engaged with the male side occlusion portion. And a female side chuck tape having a female side belt-like fitting portion.

  Moreover, although it is not a packaging bag with a chuck | zipper, the packaging bag which shape-retained plastic wire was heat-seal | fused to one of a front film or a rear film so that the content may be taken out easily is proposed (for example, patent document 2). reference.).

JP 2011-200507 A JP 2012-25453 A

  However, in the packaging bag with a chuck of Patent Document 1 described above, the shape holding member is not provided. On the other hand, in the packaging bag of Patent Document 2 described above, the shape holding member is provided on the front film and the rear film by heat welding. There was a problem of cost.

  In particular, the shape holding member generally has a higher melting point than the film used on the inner surface of the bag, and when the shape holding member is thermally welded to the film, there is a problem that the film side having a low melting point tends to wrinkle.

  In addition, it is conceivable to use an adhesive or a pressure-sensitive adhesive when bonding the shape holding member to the film, but if the adhesive or pressure-sensitive adhesive protrudes from the end face of the shape holding member and comes into contact with the content, If it is food, hygiene issues arise.

  Therefore, the present invention has been made paying attention to such problems, and a packaging bag with a chuck that can provide a shape holding member on a packaging bag with a chuck without using heat welding, an adhesive, or an adhesive. The purpose is to provide.

In order to solve the above-mentioned problems, the packaging bag with a chuck according to the present invention is a male packaging bit with a chuck according to the present invention, which has a male occlusal portion on the inner side of each of the front film and the rear film in the vicinity of the opening. a chuck portion having a side band engagement portion is provided with a chuck portion having a female side strip engaging portion having a pair of female occlusal have portions which can have bite into the male occlusal stomach, contact between the chuck A zippered packaging bag configured to be openable and closable by separation, wherein the chuck portions are spaced apart from each other in the short direction inside the front film and the rear film , and constitute each chuck portion is bonded so as to sandwich the male strip fitting portion or the female strip fitting portion thereof between the adhering portions spaced by a predetermined distance in the lateral direction is the front film and the rear film respectively A gap is formed between the side, the shape retaining member on at least one gap is inserted within the inner gap of the rear surface film and an inner gap and the chuck portion of the chuck portion and the front film, the gap On the side surface opposite to the side surface of the chuck portion facing the shape holding member inserted into the shape holding member, between the left and right end portions in the longitudinal direction of the shape holding member, the shape holding member has at least one row of the male side belt-like shape. The fitting part or the female side band-like fitting part is located and overlapped .
Here, each chuck | zipper part provided in the inner side which a front film and a rear film oppose is respectively a pair of male side strip | belt-shaped fitting parts which have a male side occlusion part, and a pair which can be engaged with a male side occlusion part. The female side belt-like fitting parts having the female side biting parts are alternately provided at a predetermined interval, and the front film side chuck part and the rear film side chuck part are respectively opposite to the male side belt-like fitting parts. It is good to be comprised so that the male side occlusion part and the female side occlusion part of the said female side strip | belt-shaped fitting part may bite.
In addition, each chuck part provided inside the front film and the rear film facing each other can be engaged with multiple rows of male side belt-like fitting parts having male side occlusion parts, or the male side occlusion part. The female side belt-like fitting portions having a pair of female side bites are provided in a plurality of rows at a fixed interval, and the front film side chuck portion and the rear film side chuck portion are respectively opposed to the male side belt-like fitting portions. It is preferable that the male-side occlusal portion of the portion and the female-side occlusal portion of the female-side belt-like fitting portion are configured to be engaged with each other.
Further, it is further preferable that at least the chuck portion on the side where the shape holding member is inserted is provided with a plurality of cuts in a direction perpendicular to the longitudinal direction at predetermined intervals in the longitudinal direction.
Further, at least the chuck portion on the side where the shape holding member is inserted may be provided with a plurality of notches in a direction perpendicular to the longitudinal direction at predetermined intervals in the longitudinal direction.
The chuck part may be a hook-and-loop fastener provided with a plurality of male side engaging parts and female side engaging parts.
Further, the shape maintaining member is further preferably provided with one or a plurality of weak portions where the strength decreases in the longitudinal direction.

  In the packaging bag with a chuck of the present invention, the front film and the rear film side chuck portion are bonded to the inner side of each film at two locations separated by a predetermined interval in the short direction, respectively, Because the shape holding member is inserted in the gap between the back side of the chuck part and the inside of the film formed between the bonding points, the shape is maintained in the packaging bag with the chuck without using heat welding, adhesive, or adhesive. A member can be provided.

It is a front view which shows the external appearance of the packaging bag with a chuck | zipper of the Example which concerns on this invention. (A), (b) It is a partial notch expansion front view which shows the structure of the chuck | zipper part vicinity of the packaging bag with a chuck | zipper of Example 1 (a shape holding member is both surfaces), respectively. It is the sectional view on the AA line in Fig.2 (a). It is a top view which expands and shows the chuck | zipper part inside a surface film. (A), (b) is the BB sectional view taken on the line in FIG. 4, and CC sectional view taken on the line, respectively. It is a top view which expands and shows the chuck | zipper part inside a back film. (A), (b) is the DD sectional view taken on the line in FIG. 6, and the EE sectional view taken on the line, respectively. It is an expanded sectional front view which shows the state which closed the chuck | zipper part of the packaging bag with a chuck | zipper of Example 1. FIG. It is a top view which shows the state which opened the chuck | zipper part of the packaging bag with a chuck | zipper of Example 1, and opened the opening part. (A), (b) is the expanded partial sectional view of F part and G part in FIG. 9, respectively. It is an expanded sectional front view which shows the state which closed the chuck | zipper part of the packaging bag with a chuck | zipper of Example 2 (a shape holding member is one side with a triple chuck). It is an expanded sectional front view which shows the state which closed the chuck | zipper part by the packaging bag with a chuck | zipper of Example 3 (a shape holding member is both surfaces with a double chuck). It is an expanded sectional front view which shows the state which closed the chuck | zipper part by the packaging bag with a chuck | zipper of Example 3 (a shape holding member is one side with a double chuck). It is an expanded sectional front view which shows the state which closed the chuck | zipper part by the packaging bag with a chuck | zipper of Example 4 (a shape holding member is both surfaces with a triple chuck). It is an expanded sectional front view which shows the state which closed the chuck | zipper part by the packaging bag with a chuck | zipper of Example 4 (a shape holding member is one side with a triple chuck). It is an expanded sectional front view which shows the state which closed the chuck | zipper part by the packaging bag with a chuck | zipper of Example 4 (a shape holding member is both surfaces with a double chuck). It is an expanded sectional front view which shows the state which closed the chuck | zipper part by the packaging bag with a chuck | zipper of Example 4 (a shape holding member is one side with a double chuck). (A)-(c) is a figure which shows the example of the cut | interruption of the chuck | zipper part of a front film and a back film, respectively. (A), (b) is a figure which shows an example of the location which bend | curves large in a shape retention member when a packaging bag with a chuck | zipper is opened, respectively. (A)-(e) is a figure which shows an example of the shape holding member in the packaging bag with a chuck | zipper of Example 6, respectively.

  Hereinafter, Examples 1 to 5 of the packaging bag with a chuck according to the present invention will be described with reference to the drawings. In addition, Examples 1-5 demonstrated below are examples of this invention to the last, and the packaging bag with a chuck | zipper concerning this invention can be suitably changed within the range of the technical idea of this invention.

[Example 1 (triple chuck with shape holding members on both sides)]
As shown in FIG. 1, the packaging bag 1 with the chuck according to the first embodiment is provided with chuck portions 1 c and 1 d on the inner sides of the front film 1 a and the rear film 1 b in the vicinity of the opening portion 11. The opening 11 is configured to be freely openable / closable by contact / separation. In addition, the front film 1a and the rear film 1b are welded by heat welding (heat seal) or the like at the left and right end portions 12, 12 and the lower end portion 13 to form the opening 11 without welding only the upper end portion.

  The chuck portion 1c provided on the front film 1a and the chuck portion 1d provided on the rear film 1b are brought into contact and separation, that is, joined and detached when the chuck portions 1c and 1d are fitted to each other. When 1d fits, it is comprised so that the inside of the packaging bag 1 with a chuck | zipper can be sealed.

  That is, the chuck portion 1c provided on the front film 1a has a male side band-like fitting portion 1c1 having a male side biting portion 1c11 in the short direction, that is, the vertical direction, as shown in FIGS. A pair of female-side biting portions 1c21, 1c22 that can be engaged with the male-side biting portion 1d11 on the chuck portion 1b1 side of the rear film 1b are alternately provided at a predetermined interval. It is configured. In Example 1, two rows of male side band-like fitting portions 1c1 and one row of female side band-like fitting portions 1c2 are provided between the two rows of male side band-like fitting portions 1c.

  Further, the chuck portion 1b1 of the rear film 1b has a chuck portion for the front film 1a so that the chuck portion 1b1 of the front film 1a can contact and separate in the short direction, that is, the vertical direction as shown in FIGS. The male side belt-like fitting portion 1d1 having the male side biting portion 1d11 that can be engaged with the female side belt-like fitting portion 1c2 of 1c and the male side belt-like fitting portion 1c1 of the chuck portion 1c of the front film 1a can be engaged. The female side belt-like fitting portions 1d2 having the pair of female side biting portions 1d21 and 1d22 are alternately provided at a predetermined interval. In the first embodiment, two rows of female side belt-like fitting portions 1d2 are provided, and one row of male side belt-like fitting portions 1d1 are provided between the two rows of female side belt-like fitting portions 1d2.

  Therefore, when the chuck part 1c on the front film 1a side and the chuck part 1b1 on the rear film 1b side are fitted or separated, the male side belt-like fitting part 1c1 and female side band-like fitting on the front film 1a side that face each other. The part 1c2, the female side band-like fitting part 1d2 and the male side band-like fitting part 1d1 on the rear film 1b side are engaged with each other as shown in FIG. 8, or separated as shown in FIG. That is, the zippered packaging bag 1 can be opened or sealed by opening and closing.

  Here, as shown in FIGS. 2 and 3, the chuck portions 1c and 1d are arranged at regular intervals inside the front film 1a or the rear film 1b, respectively, in the short direction, that is, in the vertical direction in FIGS. Bonded by thermal welding or the like at two locations 1a1, 1a2, 1b1, and 1b2 that are separated from each other.

  Therefore, in the front film 1a, a gap 1e is formed between the front film 1a and the chuck portion 1c between the two upper and lower bonding locations 1a1 and 1a2, whereas in the rear film 1b, two upper and lower bonding locations 1b1 and 1b1 are formed. A gap 1f is formed between the rear film 1b between 1b2 and the chuck portion 1d.

  And in the packaging bag 1 with a chuck | zipper of a present Example, as shown in FIG. 3 etc., the width | variety of an up-down direction is small at both the clearance gap 1e by the side of the front film 1a, and the clearance gap 1f by the side of the rear film 1b, and thickness Each of the thin shape retaining materials 1g and 1h is inserted.

  Here, the shape retaining materials 1g and 1h are more rigid than the chuck portions 1c and 1d, and resist the restoring force of the chuck portions 1c and 1d when the chuck portions 1c and 1d are bent. Thus, the shape of the opening 11 can be maintained to some extent and may be made of plastic or paper. For example, a lightweight and inexpensive plastic such as polyethylene resin is desirable. More specifically, for example, Mitsui Chemicals, which is a highly stretched high-density polyethylene resin (HDPE), similarly to the shape retaining material described in Patent Document 2 (Japanese Patent Laid-Open No. 2012-25453) described above. Plastic wire rods such as Stretched HDPE (trade name) Technoroto made by the company and Sekisui Molding Industry Co., Ltd. (trade name) Forte can be used.

  Therefore, when the contents (not shown) are taken out from the packaging bag 1 with a chuck, as shown in FIG. 9 described later, when the chuck portions 1c and 1d are largely bent, the shape holding members 1g and 1h are used. However, it is not necessary to hold the opening 11 of the packaging bag 1 with a chuck, and the contents (not shown) can be easily taken out.

  Moreover, in the packaging bag 1 with a chuck | zipper of Example 1, as shown in FIGS. 4-7 etc., the male side strip | belt-shaped fitting part 1c1 of the chuck | zipper part 1c of the front film 1a, the female side strip | belt-shaped fitting part 1c2, and a rear surface Cuts 1c3 and 1d3 are provided at predetermined intervals in the longitudinal direction of the female side belt-like fitting portion 1d2 and the male side belt-like fitting portion 1d1 of the chuck portion 1d of the film 1b.

  Therefore, as shown in FIG. 9, even when the chuck portions 1c and 1d are largely bent and the bent shape is held by the shape holding members 1g and 1h, the male side belt-like fitting portion of the chuck portion 1c of the front film 1a. 1c1 and the plurality of cuts 1c3 of the female side belt-like fitting portion 1c2, and the plurality of cuts 1d3 of the female side belt-like fitting portion 1d1 of the chuck portion 1d of the rear film 1b and the plurality of cuts 1d3 of the male side belt-like fitting portion 1d1 are reasonably bent. It is possible to prevent the chuck portions 1c and 1d from being deformed as much as possible.

  As a result, according to the packaging bag 1 with a chuck according to the first embodiment, even when the chuck portions 1c and 1d are largely bent and the bent shape is held by the shape holding members 1g and 1h, the chuck portion 1c is at the bent portion. , 1d can be prevented from being deformed, so that the chuck function of the chuck portions 1c, 1d can be prevented from being deteriorated. However, depending on the material of the chuck portions 1c and 1d, the cuts 1c3 and 1d3 may be omitted because the fitting does not become defective even if the cuts 1c3 and 1d3 are not provided.

  As described above, according to the packaging bag with a chuck 1 of Example 1, the shape is formed in the gaps 1e and 1f formed between the chuck portions 1c and 1d provided inside the front film 1a and the rear film 1b, respectively. Since the holding members 1g and 1h are inserted, the shape holding members 1g and 1h can be provided in the packaging bag 1 with a chuck without using heat welding, an adhesive, or an adhesive.

  As a result, unlike the shape-holding packaging bag described in Patent Document 2 described above, no adhesive or pressure-sensitive adhesive is used, so that the adhesive or pressure-sensitive adhesive protrudes from the end surfaces of the shape-holding members 1g and 1h and contacts the contents. This is advantageous in terms of cost because the contents can be safely packaged even with food, and no adhesive or adhesive is used.

  Moreover, in the packaging bag 1 with a chuck | zipper of Example 1, since melting | fusing point does not adhere | attach the shape holding members 1g and 1h with respect to the front film 1a and the rear film 1b, generally melting | fusing point is higher than the front film 1a and the rear film 1b. When heat-welding a high shape holding member, the front film 1a and the rear film 1b are not melted and wrinkled, and the finish and appearance can be improved even when the shape holding members 1g and 1h are provided.

  Furthermore, in the packaging bag with a chuck 1 according to the first embodiment, the shape holding members 1g and 1h of the chuck portions 1c and 1d are located at the closest positions of the gaps 1e and 1f directly behind the chuck portions 1c and 1d which are the most repelled matter. In order to hold the open state opposite to the restoring force, the shape holding effect of the opening 11 is expected more than when the shape holding members 1g and 1h are arranged at positions away from the chuck portions 1c and 1d in the vertical direction. be able to.

  Further, in general, poor fitting in a packaging bag with a zipper often occurs when the female side band-like fitting portion breaks and deforms. However, in the packaging bag 1 with a zipper of the first embodiment, the chuck portion of the front film 1a. 1c and the chuck part 1b1 of the rear film 1b, the male side band-like fitting part and the female side band-like fitting part are alternately provided at a predetermined interval, so that the chuck part 1c and the rear film of the front film 1a are provided. The male side belt-like fitting portion and the female side belt-like fitting portion are provided in both of the chuck portions 1b1 of 1b, and it is possible to prevent the occurrence of poor fitting as much as possible.

  Moreover, in the packaging bag 1 with a chuck | zipper of Example 1, the male side strip | belt-shaped fitting part 1c1 and the female side strip | belt-shaped fitting part 1c2 of the chuck | zipper part 1c, and the female side strip | belt-shaped fitting part 1d2 and male side strip | belt-shaped fitting of the chuck | zipper part 1d. Since the joint portions 1d1 are provided with cuts 1c3 and 1d3 at predetermined intervals in the longitudinal direction, the deformation when the chuck portions 1c and 1d are bent at a steep angle can be alleviated, and deterioration of the chuck function is minimized. Can be prevented.

  Therefore, as shown in FIG. 9, even when the chuck portions 1c and 1d are largely bent and the bent shape is held by the shape holding members 1g and 1h, the male side belt-like fitting portion of the chuck portion 1c of the front film 1a. 1c1 and the plurality of cuts 1c3 of the female side belt-like fitting portion 1c2, and the plurality of cuts 1d3 of the female side belt-like fitting portion 1d1 of the chuck portion 1d of the rear film 1b and the plurality of cuts 1d3 of the male side belt-like fitting portion 1d1 are reasonably bent. It is possible to prevent the chuck portions 1c and 1d from being deformed as much as possible.

  As a result, according to the packaging bag with a chuck 1 of the present embodiment, the chuck portions 1c, 1d on the side where the shape holding members 1g, 1h are provided are largely bent and the bent shape is held by the shape holding members 1g, 1h. Even in this case, the chuck portions 1c and 1d are not deformed at the bent portions, so that the chuck function of the chuck portions 1c and 1d can be prevented from being deteriorated.

[Example 2 (triple chuck with shape holding member on one side)]
In the first embodiment, the shape holding materials 1g and 1h are inserted into the gaps 1e and 1f between the front film 1a of the zippered packaging bag 1 and the chuck portions 1c and 1d of the rear film 1b. In the present invention, not limited to this, a shape-retaining material may be inserted into one of the gaps 1e and 1f of the front film 1a and the rear film 1b as in the second embodiment shown in FIG. In addition, FIG. 11 is a case where the shape maintenance material 1g is inserted in the clearance gap 1e by the side of the front film 1a, for example. In addition, when the shape holding material 1h is inserted into the gap between one film in this way, the shape holding function is that the film on the side where the shape holding material is inserted (the front film 1a in the case of FIG. 11). Therefore, the slit portion of the film on which the shape maintaining material is not inserted (the rear film 1b in the case of FIG. 11) may or may not be cut.

  In addition, as described above, in general, poor fitting in a packaging bag with a zipper often occurs when the female side band-like fitting portion is bent and deformed, and thus either the front film 1a or the rear film 1b. When inserting the shape-retaining material into the gaps 1e and 1f, in the case of FIG. 11, the shape-retaining material 1g is inserted into the gap 1e on the front film 1a side in the case of the side where the number of female side band-like fitting portions is small. Is desirable.

[Example 3 (double chuck or shape holding member is double-sided or single-sided)]
In Examples 1 and 2, the front film 1a and the rear film 1b of the zipper packaging bag 1 have two rows of male side belt-like fitting portions 1c1 and one row of female sides, respectively. Although the strip-shaped fitting portion 1c2, two rows of female-side strip-shaped fitting portions 1d2 and one row of the male-side strip-shaped fitting portion 1d1 have been provided and described, the present invention is not limited thereto. Of course, other than three rows, for example, one row, two rows as shown in FIG. 12 and FIG.

  12 and 13, the chuck part 1c on the front film 1a side is provided with a male side belt-like fitting part 1c1 and a female side belt-like fitting part 1c2 one by one, while the chuck part 1d on the rear film 1b side is also provided. The male side band-like fitting part 1d1 and the female side band-like fitting part 1d2 are provided one by one. FIG. 12 is Example 3 in which the shape holding materials 1g and 1h are inserted into both the gap 1e on the front film 1a side and the gap 1f on the rear film 1b side, respectively. FIG. 13 shows, for example, the rear film 1b side. This is Example 3 in which the shape holding material 1h is inserted only into the gap 1f.

[Example 4 (triple or double chuck, shape holding member is double-sided or single-sided)]
Moreover, in said Example 1-3, the chuck | zipper parts 1c and 1d of the front film 1a and the rear film 1b are each provided with the male side strip | belt-shaped fitting part and the female side strip | belt-shaped fitting part, respectively, and are demonstrated. However, in the present invention, the present invention is not limited to this. For example, as shown in FIGS. 14 to 17, as shown in FIGS. 14 to 17, any one of the male side belt-like fitting portions and the female side belt-like fitting portions may be provided in a plurality of rows. good.

  That is, in FIGS. 14 and 15, three rows of male side belt-like fitting portions 1c1 are provided on the chuck portion 1c on the front film 1a side, while only three female side belt-like fitting portions 1d2 are provided on the chuck portion 1d on the rear film 1b side. In FIG. 14, the shape holding materials 1g and 1h are inserted into both the gap 1e on the front film 1a side and the gap 1f on the rear film 1b side in FIG. 14, respectively. FIG. In Example 4 in which the shape retaining material 1g is inserted only into the gap 1e on the back side of the chuck part 1c having the male side band-like fitting part 1c1 that is less likely to occur than the female side band-like fitting part 1d2, that is, the gap 1e on the front film 1a side. is there.

  16 and 17 show that two rows of male side belt-like fitting portions 1c1 are provided on the chuck portion 1c on the front film 1a side, while only two female side belt-like fitting portions 1d2 are provided on the chuck portion 1d on the rear film 1b side. FIG. 16 shows a fourth embodiment in which the shape holding members 1g and 1h are respectively inserted into both the gap 1e on the front film 1a side and the gap 1f on the rear film 1b side in FIG. 16, and FIG. This is Example 4 in which the shape holding material 1h is inserted only into the gap 1f on the back side of the chuck portion 1d having the joint portion 1d1, that is, the gap 1f on the rear film 1b side.

  In addition, as shown in FIG.15 and FIG.17, when inserting the shape holding material 1g or the shape holding material 1h in either one of the front film 1a and the rear film 1b, the front film 1a which has the male side strip | belt-shaped fitting part 1c1 Alternatively, the reason why the shape holding material 1g or the shape holding material 1h is inserted into the rear film 1b side having the male side belt-like fitting portion 1d1 is that the male side belt-like fitting portions 1c1, 1d1 and the female side belt-like fitting portions 1c2, 1d2 Is bent at a steep angle, the male side band-like fitting portions 1c1 and 1d1 are less likely to be deformed than the female side band-like fitting portions 1c2 and 1d2, and the chuck portions 1c and 1d are closed after being bent at a steep angle. This is because the male side belt-like fitting portions 1c1, 1d1 are less likely to cause poor fitting than the female side belt-like fitting portions 1c2, 1d2.

[Example 5 (surface fastener)]
Further, in the above description, as the chuck portions 1c and 1d of the front film 1a and the rear film 1b, the male side belt-like fitting portions each having the male side engagement portion are arranged in a single row or a plurality of rows separated by a predetermined interval, or Although the female side band-like fitting portion having a pair of female side biting portions that can be engaged with the male side biting portion has been described by providing one row or a plurality of rows separated by a predetermined distance, the present invention is not limited thereto, As the chuck portions 1c and 1d of the front film 1a and the rear film 1b, for example, a plurality of male side engaging portions such as hook shapes and female side engaging portions such as loop shapes are provided irregularly or regularly. Of course, it may be a hook-and-loop fastener.

  When hook and loop fasteners are used as the chuck portions 1c and 1d of the front film 1a and the rear film 1b as in the fifth embodiment, the male / female contacting and separating like the male side belt-like fitting portion and the female side belt-like fitting portion are Since it is not connected in a line or band, there is a merit that damage due to bending is small, and no cut is necessary.

  In the description of Examples 1 to 4 described above, the cut portions 1c3 and 1d3 are provided in the chuck portions 1c and 1d of the front film 1a and the rear film 1b, but the cuts 1c3 and 1d3 are illustrated in FIG. As shown in a), the gaps 1c3 and 1d3 without gaps, or the gaps 1c3 ′ and 1d3 ′ with gaps as shown in FIG. 18B, and a triangular shape as shown in FIG. 18C, etc. The notches 1c3 ″ and 1d3 ″ may be used.

  However, the cuts 1c3 ′ and 1d3 ′ shown in FIG. 18B and the cutouts 1c3 ″ and 1d3 ″ shown in FIG. 18C are more than the cuts 1c3 and 1d3 without gaps shown in FIG. Since a gap is large in the longitudinal direction of the chuck portions 1c and 1d, deformation when the chuck portions 1c and 1d are bent can be prevented as much as possible.

[Example 6 (one or a plurality of weak portions in the longitudinal direction of the shape-retaining member)]
Further, in Examples 1 to 5, no shape device was given to the shape holding members 1g and 1h, but in Example 6, in the longitudinal direction of the shape holding members 1g and 1h, a recess (notch) or It is characterized in that one or a plurality of weak portions 1i where the strength is weakened by providing cuts or reducing the thickness.

  This is because when the shape holding members 1g and 1h are provided in the packaging bag with a chuck, the front film 1a and the rear film 1b are hardly bent in the vicinity of the chuck portions 1c and 1d by the shape holding function of the shape holding members 1g and 1h. is there.

  Therefore, in the sixth embodiment, when opening the bag in the packaging bag 1 with the chuck, the strength retaining portions 1i and 1h are weakly applied to the shape holding members 1g and 1h where the front film 1a and the rear film 1b are greatly bent due to a large concentration of force and the like. The shape-retaining members 1g and 1h are easily bent at the locations where they are provided or bent greatly.

  That is, the shape holding members 1g and 1h of the packaging bag 1 with a chuck according to the sixth embodiment are characterized in that one or a plurality of weakly weak portions 1i whose strength is weakened in the longitudinal direction are provided. ), One or a plurality of weak portions 1i are provided at the α and β portions that bend greatly, or one or a plurality of weak portions are provided at the α and γ portions that are bent as shown in FIG. 19B. A portion 1i is provided. Of course, the low strength portion 1i may not be provided in the α portion of the shape holding members 1g and 1h, but the low strength portion 1i may be provided in the β and γ portions.

  For example, as shown in FIG. 20A, a semicircular concave portion (notch portion) is formed on one of the left and right sides of the shape holding members 1g and 1h. The weakly weakened portion 1i may be provided by providing it, or as shown in FIG. 20 (b), the weakened weakened portion 1i may be provided by providing a plurality of recesses (notches) on the left and right sides of the shape holding members 1g and 1h. Further, as shown in FIG. 20 (c), the low-strength portion 1i may be provided by providing one or a plurality of concave portions (notches) on the left and right sides of the shape holding members 1g and 1h. .

  Further, when the α, β, and γ portions that are largely bent in the shape holding members 1g and 1h are not specified, that is, when arbitrary portions in the shape holding members 1g and 1h are easily bent, as shown in FIG. For example, a weak portion 1i having a predetermined interval may be provided by providing recesses (notches) at predetermined intervals of about 5 mm or 1 cm on the left and right sides of the shape holding members 1g and 1h, as shown in FIG. As shown, recesses (notches) may be provided at predetermined intervals on the left and right sides of the shape holding members 1g and 1h.

  As shown in FIGS. 20A to 20E, when the shape-retaining members 1g and 1h are provided with the weak strength portions 1i, the shape-retaining members 1g and 1h are not easily bent by the shape-retaining function. It can be easily bent.

  In FIGS. 20A to 20E, one or a plurality of semicircular recesses (notches) have been described in order to provide the low-strength portion 1i. However, the present invention is not limited to this. One or a plurality of triangular or quadrangular recesses (notches) are provided, or one or a plurality of cuts are provided, the thickness is further reduced, or the shape-retaining materials 1g and 1h are weakened. The weak portion 1i may be provided by crushing or bending the portion to be preliminarily. In short, it is only necessary to provide the weak portion 1i having a weaker strength than the other portions in the shape retaining materials 1g and 1h.

  In the description of Examples 1 to 6, the packaging bag with a chuck 1 composed of the front film 1a and the rear film 1b has been described as an example. However, the present invention is not limited to this structure. A packaging bag with a chuck with a gusset may be used, and the packaging bag with a chuck portion is naturally applicable regardless of the material of the packaging bag such as the front film 1a and the rear film 1b.

DESCRIPTION OF SYMBOLS 1 Packaging bag with a chuck | zipper 1a Front film 1b Rear film 1c Chuck part 1c1 Male side male side belt-like fitting part 1c11 Male side biting part 1c2 Female side band-like fitting part 1c21, 1c22 Female side biting part 1c3, 1c3 'Cut 1c3 ”Notch portion 1d Chuck portion 1d1 Male side male band-like fitting portion 1d11 Male side biting portion 1d2 Female side band-like fitting portion 1d21, 1d22 Female side biting portion 1d3, 1d3 ′ Cut 1d3” Cutout portion 1e, 1f Clearance 1g , 1h Shape retaining material 1i Low strength 11 Opening

Claims (7)

A chuck portion having a male side band-like fitting portion having a male side occlusion portion on the inner side of each of the front film and the rear film in the vicinity of the opening, and a pair of female side occlusions that can be engaged with the male side occlusion portion a chuck portion having a female side strip fitting portion having a gastric provided a zippered packaging bag constituting the opening freely opened and closed by contact and separation between the chuck portion,
The chuck portions are spaced apart from each other by a certain distance in the short direction inside the front film and the rear film , and sandwich the male side belt-like fitting portion or the female side belt-like fitting portion constituting each chuck portion. A gap is formed between the front film and the inner side of the rear film between the bonded portions separated by a predetermined interval in the short direction, and the gap between the chuck part and the inner side of the front film and the chuck part. A shape holding member is inserted into at least one of the gaps on the inner side of the rear film, and the shape is formed on the side surface opposite to the side surface of the chuck portion facing the shape holding member inserted into the gap. Between the left and right end portions of the holding member in the longitudinal direction, at least one row of the male side belt-like fitting portion or the female side belt-like fitting portion is positioned and overlaps with the shape holding member. Zipper packaging bag characterized by being composed. The packaging bag with a chuck according to claim 1,
Each chuck part provided inside the front film and the rear film facing each other has a male side band-like fitting part having a male side occlusion part and a pair of female side occlusions that can be engaged with the male side occlusion part. Alternately provided with female side belt-like fitting parts having a certain distance apart,
The front film side chuck part and the rear film side chuck part are engaged with the male side biting part of the male side band-like fitting part and the female side biting part of the female side band-like fitting part, respectively. The packaging bag with a chuck | zipper characterized by the above-mentioned. The packaging bag with a chuck according to claim 1,
Each of the chuck portions provided inside the front film and the rear film facing each other has a plurality of male side belt-like fitting portions each having a male side occlusion portion, or a pair capable of engaging with the male side occlusion portion. The female side belt-like fitting part having the female side occlusal part is provided by separating a plurality of rows at fixed intervals,
The front film side chuck part and the rear film side chuck part are engaged with the male side biting part of the male side band-like fitting part and the female side biting part of the female side band-like fitting part, respectively. The packaging bag with a chuck | zipper characterized by the above-mentioned. In the packaging bag with a chuck according to any one of claims 1 to 3,
A packaging bag with a chuck, wherein a plurality of cuts are provided in a direction perpendicular to the longitudinal direction at a predetermined interval in the longitudinal direction of at least the chuck portion on the side where the shape maintaining member is inserted. In the packaging bag with a chuck according to any one of claims 1 to 3,
A packaging bag with a chuck characterized in that at least the chuck portion on the side where the shape maintaining member is inserted is provided with a plurality of notches in a direction perpendicular to the longitudinal direction at predetermined intervals in the longitudinal direction. . The packaging bag with a chuck according to claim 1,
The zipper packaging bag is characterized in that the chuck portion is a surface fastener provided with a plurality of male side engaging portions and female side engaging portions. In the packaging bag with a chuck | zipper as described in any one of Claims 1-6,
The shape holding member is
A packaging bag with a chuck, characterized in that one or a plurality of weak portions where strength decreases in the longitudinal direction are provided.

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