JP2022021469A - Packaging bag with non-adhesion area - Google Patents

Abstract

To provide a self-standing packaging bag capable of opening a bottom part thereof smoothly.SOLUTION: A packaging bag X, capable of self-standing vertically on a placement surface H, includes: a bottom part 1 with a pair of bottom end parts 11 and 11; a storage part 2 for storing a stored article; and a pair of side parts 3 and 3 provided at both sides of the storage part 2 and having an upper adhesion area 31 integrated by adhesion and a lower non-adhesion area 32 with a shorter length in the vertical direction than the upper adhesion area 31. The lower non-adhesion area 32 is formed from a pair of lower side end parts 32A and 32A continuous to the pair of bottom end parts 11 and 11 and is formed with a bottom face 12 in which the pair of lower end parts 32A and 32A separate when the bottom part 1 is extended and which is separated from the placement surface H in an area surrounded with the pair of bottom end parts 11 and 11 and the pair of lower end parts 32A and 32A.SELECTED DRAWING: Figure 2

Description

The present invention relates to a packaging bag that can stand up and down with respect to a mounting surface.

Conventionally, there is known a packaging bag that can stand on its own by expanding a pair of lower ends of a bottom folded inside the bag (see, for example, Patent Document 1). In this type of packaging bag, the entire side surface is integrated by adhesive, and when an object to be contained such as granules is contained, the lower center end of the bottom swells, so that it is stable and self-supporting in this state. It is important to.

In the packaging bag described in Patent Document 1, the lower ends on both the left and right sides of the bottom are positioned above the lower ends on the left and right sides of the bottom, and between the lower ends on both the left and right sides of the bottom and the lower end on the center of the bottom. Is provided with a notch notched above the lower ends on both the left and right sides of the bottom. As a result, it is possible to ensure an even contact state between the lower end portions on both the left and right sides of the bottom portion and the lower end portion at the center of the bottom portion in a state where the bottom portion is expanded.

Japanese Unexamined Patent Publication No. 2005-320022

The packaging bag described in Patent Document 1 has improved self-sustaining stability, but there is room for improvement in smoothly expanding the bottom.

Therefore, there is a demand for a self-supporting packaging bag that can smoothly expand the bottom.

The packaging bag according to one aspect of the present invention is a packaging bag that can stand up and down with respect to the mounting surface, and has a bottom having a pair of bottom ends and a storage portion for accommodating an object to be contained. A pair of side portions provided on both sides of the accommodating portion and having an upper adhesive region integrated by adhesion and a lower non-adhesive region having a length shorter in the vertical direction than the upper adhesive region. The lower non-adhesive region consists of a pair of lower end portions continuous with the bottom end portion, and when the bottom portion is expanded, the pair of lower side end portions are separated from each other, and the pair of the bottom end portions are separated. It is characterized in that a bottom surface separated from the above-mentioned mounting surface is formed in a region surrounded by the pair of lower end portions.

The packaging bag has a pair of side portions having an upper adhesive region and a lower non-adhesive region having a length shorter in the vertical direction than the upper adhesive region, and the lower non-adhesive region is a pair of bottom end portions. It is composed of a pair of lower end portions that are continuous with. Further, when the bottom portion is expanded, the pair of bottom end portions and the lower end portion are separated from each other, and a bottom surface separated from the mounting surface is formed in the region surrounded by the pair of bottom end portions and the pair of lower side end portions. ing. That is, since the pair of lower end portions of the side portions are not adhered, the bottom portion of the packaging bag can be easily expanded, and since the bottom surface is separated from the mounting surface, the bottom portion is expanded. It has the effect of being able to be maintained.

Further, since the upper adhesive region is provided above the pair of unbonded lower end portions, when the contained object is accommodated in the accommodating portion, the contained object is likely to accumulate on the bottom portion, and the accumulated object is easily accumulated. The self-supporting posture of the packaging bag is easy to stabilize due to the weight of the contents. Moreover, the weight of the contained object accumulated on the bottom of the packaging bag allows the bottom to be naturally expanded. In this way, it was possible to provide a self-supporting packaging bag capable of smoothly expanding the bottom.

As another configuration, it is preferable that the length of the lower end portion in the vertical direction is one-fourth or more and three-quarters or less with respect to the width of the bottom end portion.

As described above, if the vertical length of the lower end portion is composed of one-fourth or more and three-quarters or less with respect to the width of the bottom end portion, the bottom portion can be smoothly expanded. can. In addition, in order to facilitate the expansion of the bottom portion, the length of the lower end portion should be one-fourth or more of the width of the bottom end portion, and in order to facilitate the accumulation of the contained material on the bottom portion, the lower side should be used. The length of the end is set to 3/4 or less with respect to the width of the bottom end.

As another configuration, the bottom end portion includes a first straight line portion formed in the center, a second straight line portion provided above the first straight line portion on the side of the lower end portion, and the first straight line portion. It is preferable to have a concave portion recessed upward between the second straight portion and the second straight portion.

In this way, if there is a concave portion that is recessed upward between the first straight line portion and the second straight line portion, the central bottom end portion swells and the lateral bottom when the contained object is accommodated. The central pulling force acting on the edges is alleviated by the recesses. As a result, it is possible to prevent the inconvenience that the first straight line portion is not grounded and only the second straight line portion is grounded to reduce the self-sustaining stability.

As another configuration, the width of the first straight portion is preferably configured to be 1/5 or more and 1/3 or less of the width of the bottom end portion.

As described above, if the width of the first straight portion is composed of one-fifth or more and one-third or less of the width of the bottom end portion, it is stable even if the contained object is unevenly distributed in the accommodating portion. Be independent. In addition, in order to ensure the self-sustaining stability of the packaging bag, the width of the first straight portion is set to 1/5 or more of the width of the bottom end portion, and the force that acts on the side bottom end portion is attracted to the center. In order to secure the relaxation effect of the concave portion, the width of the first straight portion is set to one-third or less of the width of the bottom end portion.

As another configuration, it is preferable that the width of the second straight line portion is 1/10 or more and 1/6 or less of the width of the bottom end portion.

As described above, if the width of the second straight line portion is configured to be 1/10 or more and 1/6 or less of the width of the bottom end portion, it is stable even if the contained object is unevenly distributed in the accommodating portion. Be independent. In addition, in order to increase the rigidity of the second straight line portion and alleviate the force pulling to the center acting on the side bottom end portion, the width of the second straight line portion is 1/10 or more of the width of the bottom end portion. In order to secure the width of the first straight line portion and enhance the self-sustaining stability of the packaging bag, the width of the second straight line portion is set to 1/6 or less of the width of the bottom end portion.

As another configuration, the vertical separation dimension between the first straight line portion and the second straight line portion is set so that only the first straight line portion abuts on the above-mentioned mounting surface when the bottom portion is expanded. It is preferable to have.

In this way, if only the first straight portion abuts on the mounting surface when the bottom portion is expanded, the first straight portion serves as a fulcrum and stands on its own stably even if the contained object is unevenly distributed in the accommodating portion.

As another configuration, when the bottom portion is expanded, the maximum dimension of the bottom surface in the expansion direction is preferably one-fourth or more and three-quarters or less with respect to the width of the bottom end portion. ..

As described above, if the maximum dimension of the bottom surface in the expansion direction is one-fourth or more and three-quarters or less with respect to the width of the bottom end portion, the bottom portion smoothly expands and is accommodated. Stable independence even if objects are unevenly distributed in the housing. In addition, in order to smoothly expand the bottom, the maximum dimension of the bottom in the expansion direction should be one-fourth or more of the width of the bottom end, and the first straight part should be reliably grounded to stabilize the independent posture. Therefore, the maximum dimension of the bottom surface in the expansion direction is set to 3/4 or less with respect to the width of the bottom end portion.

It is a front view of a packaging bag. It is a perspective view of the packaging bag in the state which contained the contents. It is a perspective view of the packaging bag which concerns on other embodiment (1). It is a front view of the packaging bag which concerns on other embodiment (2). It is a front view of the packaging bag which concerns on other embodiment (3).

Hereinafter, embodiments of the packaging bag according to the present invention will be described with reference to the drawings. In this embodiment, an example in which the granules are contained in the packaging bag X will be described. However, the present invention is not limited to the following embodiments, and various modifications can be made without departing from the gist thereof.

As shown in FIGS. 1 and 2, the packaging bag X is formed of a multi-layered sheet in which a sheet containing a synthetic resin is laminated. The packaging bag X is configured to be able to stand on its own in the vertical direction with respect to the mounting surface H. Hereinafter, when the mounting surface H is a horizontal plane, the direction of gravity will be described as the downward direction, and the direction opposite to the direction of gravity will be described as the upward direction.

The packaging bag X is an upper adhesive region provided on both sides of a bottom portion 1 having a pair of bottom end portions 11 and 11 and an accommodating portion 2 accommodating an object to be contained, and the accommodating portion 2 and integrated by adhesion. A pair of side portions 3, 3 having a 31 and a lower non-adhesive region 32 having a length shorter in the vertical direction than the upper adhesive region 31, and an opening portion 4 provided above the accommodating portion 2 with the fastener 41 as a boundary. And have. The lower non-adhesive region 32 is composed of a pair of bottom end portions 11 and 11 and a pair of lower end portions 32A and 32A that are continuous with each other. The bottom surface 12 of the packaging bag X (the lower surface of the accommodating portion 2) has a pair of bottom end portions 11 and 11 and a pair of lower end portions 32A and 32A adhered to the outer edge portion of the multilayer sheet by heat welding or the like. It is formed by that.

When the bottom portion 1 is expanded, the pair of bottom end portions 11 and 11 and the pair of lower end portions 32A and 32A are separated from each other and surrounded by the pair of bottom end portions 11 and 11 and the pair of lower end portions 32A and 32A. A bottom surface 12 is formed in the area to be separated from the mounting surface H (see FIG. 2). That is, when the bottom portion 1 is expanded, the bottom surface 12 is located above the lower ends of the pair of bottom end portions 11 and 11 and the pair of lower end portions 32A and 32A. Here, the "region surrounded by the pair of bottom end portions 11, 11 and the pair of lower end portions 32A, 32A" on which the bottom surface 12 is formed means that the bottom surface 12 is a pair of bottom end portions 11, 11 and a pair. Not only when it is surrounded by the entire area of the lower end portions 32A and 32A, for example, the lower end portion 32A extends to a region above the bottom surface 12, and the bottom surface 12 is a pair of lower side end portions 32A. , 32A including the case of being surrounded by a part of the area. The contained object may be either solid or liquid, and is preferably composed of a large number of granules.

Since the packaging bag X needs to be opened at the time of use by the purchaser, consideration should be given to the opening portion 4 to be easily opened by a notch, a thin line, a perforation, a scar group, or the like. It is preferable that a fastener 41 for opening and closing again is provided. Further, above the opening portion 4, a round hole 42 for hanging is formed through the opening portion 4 at the time of display at the store.

The bottom end portion 11 of the bottom portion 1 includes a first straight line portion 11A formed in the center, a pair of second straight line portions 11B provided above the first straight line portion 11A on the side of the lower end portion 32A, and a first straight line portion. It has a pair of concave portions 11C recessed upward between the portions 11A and the second straight line portion 11B. The first straight line portion 11A and the second straight line portion 11B are formed in a straight line parallel to the mounting surface H when the packaging bag X is mounted on the mounting surface H. The concave portion 11C is composed of an arcuate curve having an upper end near the center in the width direction between the first straight line portion 11A and the second straight line portion 11B. The concave portion 11C alleviates the force of the central bottom end portion 11 that swells and acts on the lateral bottom end portion 11 when the object to be contained is accommodated. As a result, it is possible to prevent the inconvenience that the first straight line portion 11A does not touch the ground and only the second straight line portion 11B touches the ground to reduce the self-sustaining stability.

In the present embodiment, when the bottom portion 1 is expanded, the maximum dimension D1 in the expansion direction on the bottom surface 12 is 1/4 or more and 3/4 or less (1/4 ≦ D1) with respect to the width L of the bottom end portion 11. It is preferably composed of / L ≦ 3/4), and more preferably about half with respect to the width L of the bottom end portion 11 (for example, D1 = 4 cm with respect to L = 8 cm). (See FIGS. 1 and 2). In order to smoothly expand the bottom portion 1, the maximum dimension D1 in the expansion direction on the bottom surface 12 is set to 1/4 or more of the width L of the bottom end portion 11, and the first straight portion 11A is securely grounded to stand on its own. In order to stabilize the posture, the maximum dimension D1 in the expansion direction on the bottom surface 12 is set to 3/4 or less with respect to the width L of the bottom end portion 11.

In the present embodiment, the vertical separation dimension D2 between the first straight line portion 11A and the second straight line portion 11B is set so that only the first straight line portion 11A abuts on the mounting surface H when the bottom portion 1 is expanded. (See FIGS. 1 and 2). The separation dimension D2 is preferably 1/60 or more and 1/20 or less (1/60 ≦ D2 / L ≦ 1/20) with respect to the width L of the bottom end portion 11. It is more preferable that the width L of the portion 11 is about 1/40 (for example, D2 = 2 mm with respect to L = 8 cm).

The width L1 of the first straight portion 11A is preferably formed to be 1/5 or more and 1/3 or less (1/5 ≦ L1 / L ≦ 1/3) with respect to the width L of the bottom end portion 11. It is more preferable that the width L of the bottom end portion 11 is about a quarter (for example, L1 = 2 cm with respect to L = 8 cm) (see FIG. 1). In order to ensure the self-sustaining stability of the packaging bag X, the width L1 of the first straight line portion 11A is set to one-fifth or more of the width L of the bottom end portion 11 and is drawn to the center acting on the second straight line portion 11B. In order to secure the relaxation effect of the concave portion 11C of the force, the width L1 of the first straight line portion 11A is set to one-third or less of the width L of the bottom end portion 11.

The width L2 of the second straight line portion 11B is configured to be 1/10 or more and 1/6 or less (1/10 ≦ L2 / L ≦ 1/6) with respect to the width L of the bottom end portion 11. It is more preferable that the width L of the bottom end portion 11 is about 1/8 (for example, L2 = 1 cm with respect to L = 8 cm) (see FIG. 1). In order to increase the rigidity of the second straight line portion 11B and alleviate the force pulling to the center acting on the second straight line portion 11B, the width L2 of the second straight line portion 11B is 10 minutes with respect to the width L of the bottom end portion 11. In order to secure the first straight line portion 11A and enhance the self-sustaining stability of the packaging bag X, the width L2 of the second straight line portion 11B is set to 1/6 or less of the width L of the bottom end portion 11. There is.

The distance D3 between the upper end of the concave portion 11C and the first straight portion 11A is 1/20 or more and 1/12 or less (1/20 ≦ D3 / L ≦ 1/12) with respect to the width L of the bottom end portion 11. It is preferably configured, and more preferably about 1/16 with respect to the width L of the bottom end portion 11 (for example, D3 = 5 mm with respect to L = 8 cm) (see FIG. 1). In order to alleviate the force pulling to the center acting on the second straight line portion 11B, the distance D3 is set to 1/20 or more with respect to the width L of the bottom end portion 11, and the rigidity of the bottom end portion 11 is maintained. The distance D3 is set to 1/12 or less with respect to the width L of the bottom end portion 11.

As described above, the pair of side portions 3 and 3 each have an upper adhesive region 31 and a lower non-adhesive region 32, and the lower non-adhesive region 32 is continuous with the pair of bottom end portions 11 and 11. It is composed of a pair of lower end portions 32A and 32A. The upper adhesive region 31 is integrated by laminating the sheets and adhering them by heat welding or the like, and the pair of lower end portions 32A and 32A do not have the pair of multi-layer sheets adhered to each other. Since the outer edge portion of the laminated sheet constituting the bottom surface 12 is bonded to each lower side end portion 32A by heat welding or the like, the thickness of the upper bonding region 31 of the side portion 3 and one lower side end portion 32A It is the same as the thickness. Further, the lower end portions 32A and 32A of the pair of side portions 3 and 3 are formed with tapers 32Aa that are closer to each other toward the second straight portion 11B side (see FIG. 1). Due to this taper 32Aa, the lower end of the lower end portion 32A is not a straight line extending from the second straight line portion 11B. Since the corners are not sharpened by providing the taper 32Aa, there is no inconvenience that the user's hand touches and damages the lower end of the lower end portion 32A.

As described above, since the pair of lower end portions 32A and 32A of the side portions 3 are not adhered to each other, the bottom portion 1 of the packaging bag X can be easily expanded. Further, when the bottom portion 1 is expanded, the bottom surface 12 is separated from the mounting surface H, so that the effect that the bottom portion 1 can be maintained in the expanded state is exhibited. Further, since the upper adhesive region 31 is provided above the pair of unbonded lower end portions 32A and 32A, when the contained object is stored in the accommodating portion 2, the contained object is accumulated on the bottom portion 1. It is easy, and the self-standing posture of the packaging bag X is easily stabilized by the weight of the accumulated contents. Moreover, the bottom 1 can be naturally expanded by the weight of the contained object accumulated in the bottom 1 of the packaging bag X.

The vertical length L3 of the lower end portion 32A in the present embodiment is 1/4 or more and 3/4 or less (1/4 ≦ L3 / L ≦ 3/4) with respect to the width L of the bottom end portion 11. ), And more preferably about three-eighths of the width L of the bottom end portion 11 (for example, L3 = 3 cm with respect to L = 8 cm) (see FIG. 1). In order to facilitate the expansion of the bottom portion 1, the length L3 of the lower end portion 32A is set to one-fourth or more of the width L of the bottom end portion 11, and the contents to be contained are easily accumulated in the bottom portion 1. In addition, the length L3 of the lower end portion 32A is set to 3/4 or less with respect to the width L of the bottom end portion 11.

[Other embodiments]
(1) As shown in FIG. 3, when the bottom portion 1 is expanded, the first straight line portion 11A and the second straight portion 11B are in contact with the mounting surface H in addition to the first straight portion 11A. The vertical separation dimension D2 from and may be set.
(2) As shown in FIG. 4, the taper 32Aa formed on the lower end portions 32A, 32A of the pair of side portions 3, 3 is omitted, and a sharp corner portion is formed at the lower end of the lower end portion 32A. May be. As a result, the lower end of the lower end portion 32A is a straight line extending from the second straight line portion 11B.

(3) A notch portion may be provided in which a part of the pair of lower end portions 32A, 32A of the both side portions 3, 3 is cut out. For example, as shown in FIG. 5A, a notch hole 32a (an example of the notch) to be a punch hole may be punched in a pair of lower end portions 32A, 32A of both side portions 3, 3. By heat-welding the peripheral edges of the notch holes 32a formed in the pair of lower end portions 32A and 32A to bond the pair of lower end portions 32A and 32A to each other, the bottom portion 1 shown in FIG. 2 was expanded. In the state, the length (generally L3-L4) in the vertical direction in which the pair of lower end portions 32A are separated from each other can be adjusted. Further, as another example of the notch, in the case of a polyethylene terephthalate / aluminum / polyethylene (PET / AL / PE) three-layer film, two layers of PET / AL at the lower end portions 32A and 32A are perforated to form a PE layer. It is also possible to heat-weld the PE layers to each other, leaving only the PE layers. That is, the pair of lower end portions 32A and 32A above the notch portion (notch hole 32a in FIG. 5A) of the lower non-adhesive region 32 expands the bottom portion 1 as in the upper adhesive region 31. It is a region that does not separate from each other in the state of being. This notch can be provided at any position on the lower end 32A, and the distance L4 between the lower end of the upper adhesive region 31 and the lower end of the notch 32a shown in FIG. 5A is the lower end 32A. It is preferably one-half or less with respect to the length L3 in the vertical direction, and more preferably one-third or less. If the pair of lower end portions 32A and 32A are provided with notches in this way, the separation region of the pair of lower end portions 32A can be adjusted according to the type and weight of the object to be contained, and thus the bottom portion 1 It is possible to ensure the self-sustaining stability of the packaging bag X while naturally expanding the bottom portion 1 by the weight of the contents to be accumulated in the package. The above-mentioned notch may be circular as shown in the notch 32a of FIG. 5A, but as shown in the notch 32a of FIG. 5B, the lower end portion 32A having a pair of diameter portions has a diameter portion. It may be a semicircle along the outer side of 32A, and the shape and arrangement are not particularly limited.

(4) The concave portion 11C in the above-described embodiment is not limited to the arcuate curve, and may be formed in a polygonal shape, for example, as long as it is recessed upward between the first straight line portion 11A and the second straight line portion 11B. , Any shape may be used.
(5) The concave portion 11C may not be provided at the bottom end portion 11 of the bottom portion 1 in the above-described embodiment, and all may be composed of straight portions. In this case, a stepped straight line portion may be formed so as to be upward from the center of the bottom end portion 11 toward the side.

(6) In the above-described embodiment, the "region surrounded by the pair of bottom end portions 11 and 11 and the pair of lower end portions 32A and 32A" in which the bottom surface 12 is formed means that the bottom surface 12 is a pair of bottom ends. Not only when the portions 11 and 11 and the pair of lower end portions 32A and 32A are surrounded by the entire area, the lower end portion 32A extends to a region above the bottom surface 12, and the bottom surface 12 is a pair of lower portions. It has been explained that the case where the side end portions 32A and 32A are surrounded by a part of the region is included, but the present invention is not limited to this. For example, when the bottom portion 1 shown in FIG. 2 is expanded, the upper adhesive region 31 extends to the lower side of the bottom surface 12, and the pair of lower end portions 32A, 32A are located below the bottom surface 12. Is also included in the concept of "a region surrounded by a pair of bottom end portions 11 and 11 and a pair of lower end portions 32A and 32A". That is, if the bottom portion 1 can be naturally expanded by the weight of the contained object accumulated in the bottom portion 1 of the packaging bag X, the bottom surface 12 is connected to the pair of lower end portions 32A and 32A. The boundaries are not particularly limited.
(7) The bottom end 11 of the bottom 1 and the lower end 32A of the side 3 in the above-described embodiment are formed by stacking multi-layer sheets and adhering them by heat welding or the like, but the multi-layer sheets are folded back. It may be in the form of being bonded by heat welding or the like. Further, the bonding method is not limited to heat welding, and may be bonding with an adhesive or the like.

The present invention can be used for a packaging bag that can stand up and down with respect to the mounting surface.

1: Bottom part 2: Housing part 3: Side part 11: Bottom end part 11A: First straight part 11B: Second straight part 11C: Concave part 12: Bottom surface 31: Upper adhesive area 32: Lower non-adhesive area 32A: Lower side end Part L: Width of the bottom end L1: Width of the first straight part L2: Width of the second straight part L3: Vertical length of the lower end D1: Maximum dimension in the expansion direction on the bottom surface D2: First straight part Vertical separation dimension between and the second straight part H: Mounting surface X: Packaging bag

Claims (7)

A packaging bag that can stand up and down with respect to the mounting surface.
A bottom with a pair of bottom ends,
A containment unit that houses the items to be contained,
A pair of side portions provided on both sides of the accommodating portion and having an upper adhesive region integrated by adhesion and a lower non-adhesive region having a length shorter in the vertical direction than the upper adhesive region.
The lower non-adhesive region comprises a pair of lower end portions continuous with the pair of bottom end portions.
When the bottom portion is expanded, the pair of the bottom end portions and the lower side end portion are separated from each other, and the region surrounded by the pair of the bottom end portions and the pair of the lower side end portions is separated from the above-mentioned mounting surface. A packaging bag with a formed bottom. The packaging bag according to claim 1, wherein the length of the lower end portion in the vertical direction is one-fourth or more and three-quarters or less with respect to the width of the bottom end portion. The bottom end portion includes a first straight line portion formed in the center, a second straight line portion provided above the first straight line portion on the side of the lower end portion, and the first straight line portion and the second straight line portion. The packaging bag according to claim 1 or 2, which has a concave portion recessed upward between the portions. The packaging bag according to claim 3, wherein the width of the first straight portion is one-fifth or more and one-third or less with respect to the width of the bottom end portion. The packaging bag according to claim 3 or 4, wherein the width of the second straight line portion is 1/10 or more and 1/6 or less of the width of the bottom end portion. Claims 3 to 3 in which the vertical separation dimension between the first straight line portion and the second straight line portion is set so that only the first straight line portion abuts on the above-mentioned mounting surface when the bottom portion is expanded. The packaging bag according to any one of 5. When the bottom portion is expanded, the maximum dimension of the bottom surface in the expansion direction is any one of claims 1 to 6, which is composed of one-fourth or more and three-quarters or less with respect to the width of the bottom end portion. The packaging bag described in paragraph 1.

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