JP7496200B2 - Packaging Bag - Google Patents

Description

The present invention relates to a packaging bag.

Sanitary paper such as tissue paper, toilet paper, and kitchen paper is placed in a film-like packaging bag either as is or as multiple individual packages and distributed on the market. Conventional packaging bags have a handle on the top of the main body in which the sanitary paper is placed, and the handle has a finger loop. Purchasers of sanitary paper can grasp the handle of the packaging bag by placing their fingers on the finger loop, and can carry the sanitary paper placed in the packaging bag.

For example, FIG. 1 of JP 2017-165462 A (Patent Document 1) discloses a packaging bag in which a handle is provided on the top of the main body that contains the toilet roll, and the handle has one handle hole. Also, FIG. 2 of JP 4226932 A (Patent Document 2) discloses a packaging bag for storing roll products in which a grip provided on the top of the main body has two finger holes.

JP 2017-165462 A Japanese Patent No. 4226932

In conventional packaging bags, when the bag containing the packaged item is lifted, the handle stretches or deforms, which can cause pain to the fingers that are placed around the finger loop of the handle. In addition, when carrying the packaged item contained in the packaging bag, it may not be possible to carry the packaged item stably.

The objective of the present invention is to provide a packaging bag that is easy to hold and has excellent stability.

The first aspect of the present invention provides a packaging bag having a main body for accommodating a packaged item, a handle portion having a lower end connected to an upper portion of the main body, and a finger hook portion formed in the center of the handle portion, the packaging bag having a seal portion formed at the lower end of the handle portion and extending in the longitudinal direction of the handle portion along the lower end, and the center portion of the seal portion in the longitudinal direction is convex toward the main body.

In the first embodiment, the lower end of the handle is connected to the upper part of the main body in which the packaged item is stored, a seal is formed along the lower end of the handle, and the center of the seal in the longitudinal direction is convex toward the main body. This shortens the distance from both ends of the finger hook, which is the handle that is pulled toward the main body by the greatest force, to the lower end of the handle where the seal is provided.

In addition, when a packaging bag containing a packaged item is lifted up by placing one's fingers on the finger loop of the handle, a force is generated between the lower end of the finger loop and the lower end of the handle that causes the handle to shrink inward in the longitudinal direction. However, the force generated within the handle tends to be easily transmitted along the seal. Therefore, the force that causes the handle to shrink inward in the longitudinal direction can be released to the seal, the central part of which is convex toward the main body. This is thought to weaken the force that causes the handle to shrink inward in the longitudinal direction.

With this configuration, in the first aspect, the handle portion can be prevented from stretching or deforming. Therefore, the fingers of the hand placed on the finger hook portion are less tightly gripped by the handle portion, and are less likely to be hurt. In addition, when carrying the packaging bag containing the packaged object, the packaged object is prevented from shaking when it is contained in the packaging bag, and the packaged object can be carried stably while contained in the packaging bag. In this way, according to the first aspect, a packaging bag that is easy to hold and has excellent stability can be provided.

The second aspect of the present invention provides a packaging bag in which the central portion of the sealed portion is curved toward the main body. In the second aspect, by curving the longitudinal central portion of the sealed portion toward the main body, a sealed portion can be constructed with high precision in which the longitudinal central portion is convex toward the main body. This makes it possible to prevent the handle portion from stretching or deforming. Therefore, according to the second aspect, a packaging bag that is easy to hold and has excellent stability can be provided.

A third aspect of the present invention provides a packaging bag in which the central portion of the seal portion is tapered toward the main body. In the third aspect, by tapering the central portion in the longitudinal direction of the seal portion toward the main body, a seal portion in which the central portion in the longitudinal direction is convex toward the main body can be constructed with high precision.

In addition, the force that causes the handle to shrink inward in the longitudinal direction can be easily released along the seal portion that is tapered toward the main body, further weakening the force that causes the handle to shrink inward in the longitudinal direction. As a result, in the third aspect, the handle is further prevented from stretching or deforming, and a packaging bag that is easy to hold and has excellent stability can be provided with even greater precision.

The fourth aspect of the present invention provides a packaging bag in which the center of the seal portion faces the finger hook portion in the short direction of the handle portion. In the fourth aspect, by facing the center of the seal portion, which is convex toward the main body, to the finger hook portion in the short direction of the handle portion, the distance from both ends of the finger hook portion, which is the part of the handle portion that is pulled toward the main body by the greatest force, to the bottom end of the handle portion on which the seal portion is provided, can be shortened with high precision.

In addition, the force that causes the handle to shrink inward in the longitudinal direction can be released with high precision to the seal portion, whose central portion in the longitudinal direction is convex toward the main body, further weakening the force that causes the handle to shrink inward in the longitudinal direction. As a result, in the fourth aspect, it is possible to further prevent the handle from stretching or deforming, and to provide a packaging bag that is easy to hold and has excellent stability with high precision.

The fifth aspect of the present invention provides a packaging bag in which the finger hook portion is formed of a slit extending in the longitudinal direction, and the slit is convex toward the lower end side of the handle portion. In the fifth aspect, the finger hook portion is formed of a slit extending in the longitudinal direction, and the slit is convex toward the lower end side of the handle portion, so that the lower end of the finger hook portion is convex toward the lower end side of the handle portion and is disposed approximately parallel to the center of the seal portion.

As a result, when a packaging bag containing a packaged item is lifted by placing fingers on the finger loop of the handle, the force pulling the bag toward the main body between the lower end of the finger loop and the lower end of the handle is distributed radially from the lower end of the finger loop to the center of the seal. Therefore, in the fifth aspect, it is possible to further prevent the handle from stretching or deforming, and to provide a packaging bag that is easy to hold and has excellent stability with even greater precision.

A sixth aspect of the present invention provides a packaging bag in which the seal portion is convex toward the upper end side of the handle portion from the center portion to both ends of the seal portion. In the sixth aspect, the seal portion formed at the lower end of the handle portion is convex toward the upper end side of the handle portion from the center portion to both ends, thereby forming two convex portions between the center and both ends of the seal portion. The two convex portions are arranged side by side with each end of the finger hook portion along the longitudinal direction of the handle portion.

In this configuration, the distance from each end of the finger hook to the seal portion (two protruding portions) along the longitudinal direction of the handle is shortened. This prevents the handle from stretching or deforming between the center and both ends of the handle, making it possible to provide a packaging bag that is easy to hold and has excellent stability with even greater precision.

The seventh aspect of the present invention provides a packaging bag in which both ends of the seal portion extend parallel to the longitudinal direction. In the seventh aspect, by having both ends of the seal portion extend parallel to the longitudinal direction, the force that causes the handle portion to shrink inward in the longitudinal direction can be released to the outside of the handle portion in the longitudinal direction along both ends of the seal portion. This is thought to further weaken the force that causes the handle portion to shrink inward in the longitudinal direction. Therefore, in the seventh aspect, it is possible to further suppress the handle portion from stretching or deforming, and to provide a packaging bag that is easy to hold and has excellent stability with even higher precision.

The eighth aspect of the present invention provides a packaging bag having a reinforcing portion formed on the inside of the handle and surrounding the finger hook portion, with a part of the reinforcing portion being configured by the central portion of the seal portion. In the eighth aspect, by forming a reinforcing portion surrounding the finger hook portion on the inside of the handle portion, stretching and deformation of the handle portion around the finger hook portion is suppressed, and a packaging bag that is easy to hold and has excellent stability can be provided with even higher precision.

In addition, by making the center of the seal part, which protrudes toward the main body, part of the reinforcement part can be made to suppress stretching and deformation of the handle part. In addition, by making part of the reinforcement part the center of the seal part, it becomes easier to position the reinforcement part.

A ninth aspect of the present invention provides a packaging bag in which the upper part of the main body is sealed with the seal part. In the ninth aspect, by sealing the upper part of the main body with a seal part whose central part in the longitudinal direction is convex toward the main body, it is possible to seal the upper part of the main body while forming a handle part on the upper part of the main body that is suppressed from stretching or deforming.

According to one aspect of the present invention, it is possible to provide a packaging bag that is easy to hold and has excellent stability.

1 is a diagram showing a packaging bag according to an embodiment of the present invention. 3A and 3B are diagrams showing a handle portion of the packaging bag according to the first embodiment. 1 is a diagram showing the packaging bag according to the present embodiment in a state before fingers are placed on the finger hook portion. FIG. 1 is a diagram showing a state in which fingers are hooked on a finger hook portion in the packaging bag according to the present embodiment. FIG. 1 is a diagram showing a state in which the packaging bag according to the present embodiment is lifted up by gripping the handle portion. FIG. 13A and 13B are diagrams showing a handle portion of a packaging bag according to a second embodiment. 13A and 13B are diagrams showing a handle portion of a packaging bag according to a third embodiment. FIG. 1 is a diagram showing a handle portion of a conventional packaging bag (Comparative Example 1). FIG. 13 is a diagram showing a handle portion of a conventional packaging bag (Comparative Example 2).

The following describes in detail an embodiment of the present invention with reference to the drawings. In the following description, parts common to each figure may be given the same reference numerals and explanations thereof may be omitted. Furthermore, the scale of each component in each figure may differ from the actual scale. Furthermore, in each figure, the left-right direction (longitudinal direction of the handle) is the X direction, the up-down direction (shortitudinal direction of the handle) is the Y direction, and the front-rear direction (thickness direction of the handle) is the Z direction.

Figure 1 shows a packaging bag according to an embodiment of the present invention. Also, Figure 2 shows the handle portion of the packaging bag according to the first embodiment. In Figures 1 and 2, the packaging bag 100 comprises a main body 10, a handle portion 20, and a finger hook portion 30. Note that the packaging bag 100 is one example of the packaging bag of the present invention, and the main body 10, the handle portion 20, and the finger hook portion 30 are each one example of the main body portion and the handle portion that constitute the packaging bag of the present invention.

The main body 10 constitutes the main body (bag body) of the packaging bag 100 in which the packaged object P is contained. The shape of the main body 10 is not limited, and for example, a resin film is formed into a bag shape by side sealing, and further folded into a gusset shape (see Figure 1). The material forming the main body 10 is not limited to resin, and paper may be used. Furthermore, the material forming the main body 10 may be a biodegradable material (biodegradable plastic, biodegradable paper, etc.).

When the main body 10 is formed from a resin film, the material of the resin film is not particularly limited, but for example, a resin film such as polyethylene (PE) or a laminate of PE-ethylene vinyl alcohol copolymer (EVOH)-PE (PE/EVOH/PE) can be used. In addition, the thickness of the resin film is not particularly limited, but can be 10 to 70 μm, preferably 15 to 60 μm, and more preferably 20 to 50 μm.

1, when a packaged object (described later) is housed in the main body 10, the main body 10 has an upper surface 11, a lower surface 12, a front surface 13, a rear surface 14, a side surface 15, and a side surface 16. Of the respective surfaces of the main body 10, the upper surface 11 and the lower surface 12 face each other in the up-down direction (Y direction), the front surface 13 and the rear surface 14 face each other in the front-rear direction (Z direction), and the side surface 15 and the side surface 16 face each other in the left-right direction (X direction).
The upper surface 11 is an example of an upper portion of the main body constituting the packaging bag according to the present invention.

Of the surfaces of the main body 10, the top surface 11 is located above in the vertical direction (Y direction), and the bottom surface 12 is located below in the vertical direction (Y direction). The front surface 13 is located in front in the front-to-rear direction (Z direction), and the back surface 14 is located behind in the front-to-rear direction (Z direction). Furthermore, the side surface 15 is located on the left in the left-to-right direction (X direction), and the side surface 16 is located on the right in the left-to-right direction (X direction). The side surfaces 15 and 16 are continuous with the top surface 11, bottom surface 12, front surface 13, and back surface 14 (see Figure 1).

The main body 10 contains a plurality of individually wrapped objects P as an example of the packaged object (see FIG. 1). Each individually wrapped object P contains stacked tissue paper (not shown). Note that the form of the packaged object is not limited to an individually wrapped object, and tissue paper may be directly contained in the main body 10.

The packaged item contained in the main body 10 is not limited to tissue paper, but may be sanitary thin paper such as toilet paper, kitchen paper, baby or nursing diapers, sanitary napkins, etc. These sanitary thin papers also include sanitary thin papers containing moisturizing ingredients (for example, lotion tissue, etc.). There are no particular limitations on the use of the sanitary thin paper, and it can be used for industrial, household, or portable purposes.

Furthermore, the number of individual packages P stored in the main body 10 is not limited. That is, the number of individual packages P stored may be one, or may be multiple as shown in FIG. 1. In the example shown in FIG. 1, five individual packages P are arranged in the left-right direction (X direction), and stacked in two layers in the up-down direction (Y direction), for a total of ten individual packages P stored in the main body 10.

The arrangement of the packaged items P stored in the main body 10 is not limited to this arrangement, and for example, five individually packaged items P may be stored lined up in the height direction (Y direction). Also, eight rolls of toilet paper may be stored in the main body 10 in a state where four rolls are arranged in one layer, stacked in two layers. Also, 12 rolls of toilet paper (packaged items T) may be stored in the main body 10 in a state where they are arranged in one layer.

As shown in FIG. 1, the handle 20 is provided on the upper part (top surface 11) of the main body 10 and constitutes a part for gripping the packaging bag 100 with the fingers or palm (hereinafter referred to as fingers, etc.). Specifically, the lower end 22 of the handle 20 is connected to the upper part (top surface 11) of the main body 10. The shape of the handle 20 is not limited, and for example, the contour shape of the handle 20 when viewed in the thickness direction (Z direction) can be a quadrangle such as a rectangle (see FIG. 1 and FIG. 2). Note that in FIG. 1, the handle 20 is shown standing up in the height direction (Y direction) for ease of understanding, but it is usually manufactured and sold in a state where it is laid down on the top surface 11 of the main body 10.

The dimensions of the handle 20 are not limited and can be determined by the dimensions of the main body 10 and the dimensions of the finger hook 30 described below. If the shape of the handle 20 is rectangular, the dimension in the longitudinal direction (X direction) of the handle 20 can be set to 150 to 500 mm, preferably 160 to 400 mm, and more preferably 170 to 300 mm. The dimension in the height direction (Y direction) of the handle 20 can be set to 35 to 150 mm, preferably 40 to 130 mm, and more preferably 45 to 100 mm.

The handle 20 can be formed of a resin film or the like, similar to the main body 10. The handle 20 is formed on the upper part (top surface 11) of the main body 10 by a part (bottom end seal 52) of the seal part 50. Specifically, the upper part (top surface 11) of the main body 10 is sealed by the bottom end seal 52 of the seal part 50.

In this embodiment, heat sealing is used for the sealing portion 50. For this heat sealing, a method (stamp method) can be used in which the resin film folded into the gusset shape described above is embossed with a hot plate for forming the handle.

The handle portion 20 is formed in the center 11a in the depth direction (Z direction) of the upper portion (top surface 11) of the main body 10. The position at which the handle portion 20 is provided is not limited to the top surface 11 of the main body 10, but may be a surface other than the top surface 11 (bottom surface 12, front surface 13, back surface 14, side surface 15, side surface 16). In this case, the surface of the main body 10 other than the top surface 11 becomes the upper portion of the main body 10.

The folded resin film is adhered at the seal section 50 in four layers at both ends 23, 24 in the longitudinal direction (X direction) of the handle section 20 and in two layers near the center section 25 of the handle section 20. The form of the seal section 50 is not limited to heat sealing, and the seal section 50 may be formed by applying an adhesive, pressure sensitive adhesive, etc. (see Figures 1 and 2).

Here, the central portion 25 of the handle portion 20 refers to the portion including the center (or centroid) 25a of the handle portion 20 and its surroundings, and occupies approximately 40% to 60% of the entire handle portion 20 in the longitudinal direction (X direction) of the handle portion 20. In addition, the ends 23, 24 of the handle portion 20 refer to the portions including the end edges 23a, 24a of the handle portion 20 in the longitudinal direction (X direction) and their vicinity.

The seal portion 50 is composed of an upper end seal 51, a lower end seal 52, a side end seal 53, and a side end seal 54. The upper end seal 51 is provided at the upper end 21 of the handle portion 20. The lower end seal 52 is provided at the lower end 22 of the handle portion 20. The side end seal 53 is provided on the end 23 side of the central portion 25 of the handle portion 20. The side end seal 54 is provided on the end 24 side of the central portion 25 of the handle portion 20 (see Figure 2).

The upper end seal 51 is formed to extend in the longitudinal direction (X direction) of the handle portion 20 along the upper end 21 of the handle portion 20. The seal portion (lower end seal 52) is formed to extend in the longitudinal direction (X direction) of the handle portion 20 along the lower end 22 of the handle portion 20. The side end seal 53 is formed to extend in the lateral direction (Y direction) of the handle portion 20 along the end portion 23 of the handle portion 20. The side end seal 54 is formed to extend in the lateral direction (Y direction) of the handle portion 20 along the end portion 24 of the handle portion 20 (see FIG. 2).

As a result, a seal portion 50 (upper end seal 51, lower end seal 52, side end seals 53, 54) is formed inside the handle portion 20. The central portion 51A of the upper end seal 51, the central portion 52A of the lower end seal 52, and the portion surrounded by the side end seals 53, 54 form the central portion 25 of the handle portion 20. It is preferable that the handle portion 20 has an air hole (not shown) that connects the main body 10 to the outside of the packaging bag 100 so that the main body 10 to which the handle portion 20 is connected does not burst during the manufacture or distribution of the packaging bag 100.

As shown in Figs. 1 and 2, a finger hook 30 is formed in the center 25 of the handle 20. The finger hook 30 is configured with a slit S that extends in the longitudinal direction (X direction) of the handle 20. The shape of the slit is not particularly limited, but it can be formed, for example, by a perforation, and the finger hook 30 can be formed by breaking the perforation.

As for the manner in which the finger hook 30 extends along the longitudinal direction (X direction) of the handle, it may or may not be parallel to the longitudinal direction (X direction) of the handle 20. In this embodiment, the finger hook 30 is not parallel to the longitudinal direction (X direction) of the handle 20, and has a convex shape toward the lower end 22 of the handle 20.

Specifically, finger hook portion 30 is configured with a circular arc-shaped slit S in which center portion 31 is located closer to lower end 22 of handle portion 20 than both end portions 32, 33 (see Figs. 1 and 2). Note that the shape of finger hook portion 30 is not limited, and may be any of a straight line, a curve other than a circular arc, a wavy line, a circle, an ellipse, a rectangle, or a shape similar thereto.

Here, the central portion 31 of the finger hook portion 30 refers to the portion including the center (or centroid) 31a of the finger hook portion 30 and its surroundings, and occupies approximately 40% to 60% of the entire finger hook portion 30 in the longitudinal direction (X direction) of the handle portion 20. In addition, the ends 32, 33 of the finger hook portion 30 refer to the portions including the longitudinal edges 32a, 33a of the handle portion 20 in the X direction and their vicinity.

In this embodiment, the finger hook 30 is formed with one slit (see FIG. 1), but the number of slits is not limited. Therefore, the finger hook 30 may be formed with two or more slits, for example, it can be formed with two slits arranged at a predetermined interval in the longitudinal direction (X direction) of the handle 20.

The handle 20 may also be provided with a reinforcing film (not shown). This reinforcing film may be made of a resin film. The material of the reinforcing film is not particularly limited, and may be the same as or different from the material of the resin film that constitutes the handle 20. Examples of such resin films that can be used include polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), a laminate of PE-ethylene vinyl alcohol copolymer (EVOH)-PE (PE/EVOH/PE), polyvinylidene chloride (PVDC), and the like. By providing such a reinforcing film, the center portion 25 of the handle 20 where the finger hook portion 30 is formed can be reinforced.

The thickness dimension of the reinforcing film is also arbitrary. For example, the thickness of the reinforcing film can be 20 μm or more, preferably 30 μm to 150 μm, and more preferably 50 μm to 130 μm. By setting the thickness dimension of the reinforcing film within this range, it is possible to prevent the handle portion 20 from stretching or breaking. Furthermore, the reinforcing film can be adhered to the handle portion 20 by the above-mentioned heat welding or the like when the seal portion 50 is formed.

In the packaging bag 100 according to this embodiment, the bottom seal 52, which is part of the sealed portion 50, is composed of a central portion 52A and end portions 52B and 52C. The central portion 52A of the bottom seal 52 is located at the lower end of the central portion 25 of the lower end 22 of the handle portion 20 (the central portion 22A of the lower end 22).

Here, the central portion 22A of the lower end 22 refers to the portion that includes the center (or centroid) of the lower end 22 and its surroundings, and occupies approximately 40% to 60% of the entire lower end 22 in the longitudinal direction (X direction) of the handle portion 20. In addition, the ends 22B and 22C of the lower end 22 refer to the portion that includes the ends E1 and E2 in the longitudinal direction (X direction) of the handle portion 20 and their vicinity.

The central portion 52A of the bottom end seal 52 refers to the portion of the bottom end seal 52 that is located at the central portion 22A of the bottom end 22. The ends 52B and 52C of the bottom end seal 52 refer to the portions of the bottom end seal 52 that are located at the ends 22B and 22C of the bottom end 22.

End 52B of bottom seal 52 is located at the lower end of end 23 of lower end 22 of handle 20 (end 22B of lower end 22). End 52C of bottom seal 52 is located at the lower end of end 24 of lower end 22 of handle 20 (end 22C of lower end 22) (see Figure 2).

The bottom seal 52 is an example of a seal formed at the bottom end of the handle that constitutes the packaging bag of the present invention. The center portion 52A of the bottom seal 52 is an example of the longitudinal center portion of a seal formed at the bottom end of the handle that constitutes the packaging bag of the present invention.

In this embodiment, the center portion 52A in the longitudinal direction (X direction) of the bottom end seal 52 is convex toward the main body 10. In other words, the center 11a of the upper surface 11 of the main body 10 is curved in correspondence with the center portion 52A of the bottom end seal 52. In this embodiment, the entire bottom end seal 52, which is composed of the center portion 52A, end portion 52B, and end portion 52C, is convex toward the main body 10 (see Figures 1 and 2).

In the first embodiment of the present embodiment, as an example of a configuration in which the central portion 52A of the bottom end seal 52 is convex toward the main body 10, the central portion 52A of the seal portion (bottom end seal 52) is configured to be curved toward the main body 10 (see FIG. 2). Specifically, the shape of the central portion 52A of the bottom end seal 52 has an arc shape that is convex toward the main body 10 (see FIGS. 1 and 2).

In addition, in this embodiment, the central portion 52A of the bottom end seal 52 faces the finger hook portion 30 in the short direction (Y direction) of the handle portion 20. Specifically, the finger hook portion 30 is disposed inside the central portion 25 of the handle portion 20, and the central portion 52A of the bottom end seal 52 is disposed at the lower end (central portion 22A of the bottom end 22) of the central portion 25 of the handle portion 20, with the finger hook portion 30 and the central portion 52A of the bottom end seal 52 being disposed side by side in the short direction (Y direction) (see Figures 1 and 2).

In this embodiment, the central portion 51A of the upper end seal 51, the central portion 52A of the lower end seal 52, and the side end seals 53 and 54, which surround the central portion 25 of the handle portion 20 where the finger hook portion 30 is formed, constitute the reinforcing portion R. In other words, a part of the reinforcing portion R is constituted by the central portion 52A of the seal portion (lower end seal 52) (see FIG. 2).

Figures 3 to 5 are diagrams showing how the packaging bag 100 according to this embodiment is used. Note that the packaged object P is not shown in Figures 3 to 5. Also, Figures 3 to 5 show the handle portion 20 standing up in the height direction (Y direction). Here, the effects of this embodiment will be explained with reference to Figures 3 to 5.

In this embodiment, in the packaging bag 100, the user places fingers H on the finger hook portion 30 of the handle 20 (see FIG. 3) before placing the fingers H on the finger hook portion 30 (see FIG. 4). Then, with the fingers H placed on the finger hook portion 30, the user grasps the handle 20 and lifts up the packaging bag 100 containing the packaged object P (see FIG. 5).

In this embodiment, as described above, the lower end 22 of the handle portion 20 is connected to the upper portion (upper surface 11) of the main body 10 in which the packaged object P is stored. In addition, a seal portion (lower end seal 52) is formed along the lower end 22 of the handle portion 20, extending in the longitudinal direction (X direction) of the handle portion 20. The central portion 52A of the seal portion (lower end seal 52) in the longitudinal direction (X direction) is convex toward the main body 10.

As a result, when the packaging bag 100 containing the packaged item P is lifted up by placing fingers H on the finger hook 30 of the handle 20, the distance from both ends 32, 33 of the finger hook 30 to the bottom end 22 of the handle 20 where the seal (bottom end seal 52) is provided is shortened. Note that both ends 32, 33 of the finger hook 30 tend to be the parts of the handle 20 that are pulled toward the main body 10 with the greatest force.

In addition, when the user places his/her fingers H on the finger hook 30 of the handle 20 to lift up the packaging bag 100 containing the packaged item P, a force is generated between the lower end 30a of the finger hook 30 and the lower end 22 of the handle 20 that causes the handle 20 to shrink inward in the longitudinal direction (X direction). On the other hand, the force generated within the handle 20 tends to be easily transmitted along the seal (lower end seal 52). Therefore, the force that causes the handle 20 to shrink inward in the longitudinal direction (X direction) can be released to the seal (lower end seal 52) whose central portion 52A in the longitudinal direction (X direction) is convex toward the main body 10. This is thought to weaken the force that causes the handle 20 to shrink inward in the longitudinal direction (X direction).

With this configuration, in this embodiment, the handle portion 20 can be prevented from stretching or deforming. Therefore, the fingers H hooked on the finger hook portion 30 are less tightly gripped by the handle portion 20, and are less likely to be hurt. In addition, when carrying the packaging bag 100 containing the packaged item P, shaking of the packaged item P contained in the packaging bag 100 is suppressed, and the packaged item P can be carried stably while contained in the packaging bag 100. In this way, the packaging bag 100 according to this embodiment is easy to hold and has excellent stability (see Figures 1 to 5).

In addition, in the first embodiment, as described above, by curving the central portion 52A in the longitudinal direction (X direction) of the sealed portion (bottom end seal 52) toward the main body 10, the sealed portion (bottom end seal 52) can be configured with high precision such that the central portion 52A in the longitudinal direction (X direction) is convex toward the main body 10. This makes it possible to prevent the handle portion 20 from stretching or deforming. Therefore, according to the first embodiment, it is possible to provide a packaging bag 100 that is easy to hold and has excellent stability (see Figures 1 to 5).

In addition, in this embodiment, as described above, the center portion 52A of the seal portion (bottom end seal 52) that is convex toward the main body 10 faces the finger hook portion 30 in the short direction (Y direction) of the handle portion 20. As a result, in this embodiment, the distance from both ends 32, 33 of the finger hook portion 30, which is the portion of the handle portion 20 that is pulled toward the main body 10 by the greatest force, to the bottom end 22 of the handle portion 20 where the seal portion (bottom end seal 52) is provided, can be shortened with high precision.

In addition, the force that causes the handle portion 20 to shrink inward in the longitudinal direction (X direction) can be released with high precision to the seal portion (bottom end seal 52) whose central portion 52A in the longitudinal direction (X direction) is convex toward the main body 10, further weakening the force that causes the handle portion 20 to shrink inward in the longitudinal direction (X direction). As a result, in this embodiment, the handle portion 20 can be further prevented from stretching or deforming, and a packaging bag 100 that is easy to hold and has excellent stability can be provided with high precision (see Figures 1 to 5).

In this embodiment, the finger hook portion 30 is configured with a slit S that extends in the longitudinal direction (X direction), and the slit S is convex toward the bottom end 22 of the handle portion 20, so that the bottom end 30a of the finger hook portion 30 is convex toward the bottom end 22 of the handle portion 20 and is positioned approximately parallel to the center portion 52A of the seal portion (bottom end seal 52).

As a result, when the packaging bag 100 containing the packaged item P is lifted by placing fingers H on the finger loop 30 of the handle 20, the force pulling the bag toward the main body 10 between the lower end 30a of the finger loop 30 and the lower end 22 of the handle 20 is distributed radially from the lower end 30a of the finger loop 30 to the center portion 52A of the seal portion (lower end seal 52). Therefore, in this embodiment, the handle 20 can be further prevented from stretching or deforming, and a packaging bag 100 that is easy to hold and has excellent stability can be provided with even higher precision (see Figures 1 to 5).

As described above, in the packaging bag 100 according to this embodiment, the reinforcing portion R surrounding the finger hook portion 30 is formed on the inside of the handle portion 20. This prevents the handle portion 20 from stretching or deforming around the finger hook portion 30, making it possible to provide a packaging bag 100 that is easy to hold and has excellent stability with even higher precision.

In addition, the central portion 52A of the seal portion (bottom end seal 52) that protrudes toward the main body 10 constitutes part of the reinforcing portion R, which can suppress the stretching and deformation of the handle portion 20. Furthermore, the central portion 52A of the seal portion (bottom end seal 52) constitutes part of the reinforcing portion R, which makes it easier to position the reinforcing portion R (see Figures 1 and 2).

As described above, in the packaging bag 100 according to this embodiment, the upper part (upper surface 11) of the main body 10 is sealed at the central part 52A in the longitudinal direction (X direction) with a seal part (bottom end seal 52) that protrudes toward the main body 10. This allows the upper part (upper surface 11) of the main body 10 to be sealed while forming the handle part 20 on the upper part (upper surface 11) of the main body 10, which is suppressed from stretching or deforming (see Figures 1 and 2).

Figure 6 is a diagram showing the handle portion of a packaging bag according to the second embodiment. In the second embodiment, the bottom seal 52 is convex toward the upper end 21 of the handle portion 20 from the center 52A of the bottom seal 52 to both ends 52B, 52C of the seal portion. In other words, convex portions F1, F2 are formed between the center 52A and both ends 52B, 52C of the bottom seal 52. Specifically, the convex portions F1, F2 of the bottom seal 52 are both curved toward the upper end 21 of the handle portion 20.

In the second embodiment, the end E1 of the end 22B of the bottom seal 52 (the end on the end 23 side of the handle 20) is aligned with the apex M of the center 52A of the bottom seal 52 along the longitudinal direction (X direction) of the handle 20. Also, the end E2 of the end 52C of the bottom seal 52 (the end on the end 24 side of the handle 20) is aligned with the apex M of the center 52A of the bottom seal 52 along the longitudinal direction (X direction) of the handle 20 (see FIG. 6).

In the second embodiment, two protrusions F1, F2 are formed between the center 52A and both ends 52B, 52C of the bottom seal 52, thereby shortening the distance from each end 32, 33 of the finger hook 30 to the bottom seal 52 (protrusions F1, F2) along the longitudinal direction (X direction) of the handle 20. This prevents the handle 20 from stretching or deforming even between the center 25 of the handle 20 and both ends 23, 24 of the handle 20, making it possible to provide a packaging bag 100 that is easy to hold and has excellent stability with even greater precision.

In the second embodiment, the ends E1, E2 of both ends 52B, 52C of the bottom seal 52 are aligned with the apex M of the central portion 52A of the bottom seal 52 and along the longitudinal direction (X direction) of the handle portion 20. Therefore, the distance from the top (upper surface 11) of the main body 10 to the bottom end 22 of the handle portion 20 for both ends E1, E2 of both ends 52B, 52C of the bottom seal 52 can be made approximately the same length for the central portion 52A of the bottom seal 52 and both ends 52B, 52C.

As a result, in the second embodiment, the strength of both ends 23, 24 of the handle 20 is maintained, and stretching and deformation of the handle 20 and the main body 10 can be suppressed when carrying the packaging bag 100 contained in the main body 10. Therefore, in the second embodiment, the fingers H hooked on the finger hook portion 30 are less tightly gripped by the handle 20, and are less likely to be hurt (see FIG. 6).

Figure 7 is a diagram showing the handle portion of a packaging bag according to a third embodiment. In the third embodiment, in the handle portion 20 of the packaging bag 100, the central portion 52A of the bottom seal 52 is tapered (or narrows) toward the main body 10. Specifically, the central portion 52A of the bottom seal 52 is composed of a tip portion T1, an inclined portion T2 that extends continuously from the side seal 53 to the tip portion T1, and an inclined portion T3 that extends continuously from the side seal 54 to the tip portion T1. The distance between the inclined portions T2 and T3 gradually decreases as they approach the tip portion T1 (see Figure 7).

In addition, in the packaging bag 100 of the third embodiment, both end portions 22B, 22C of the sealed portion (bottom end seal 52) extend parallel to the longitudinal direction (X direction). Here, "parallel" is not limited to completely parallel, but also includes approximately parallel. In the third embodiment, the distance between the upper end 21 and the lower end 22 of the handle portion 20 is approximately constant in the short direction (Y direction) of both end portions 23, 24 of the handle portion 20 (see FIG. 7).

In the third embodiment, as described above, the central portion 52A in the longitudinal direction (X direction) of the seal portion (lower end seal 52) is tapered toward the main body 10, so that the seal portion (lower end seal 52) can be configured with high precision such that the central portion 52A in the longitudinal direction (X direction) is convex toward the main body 10.

In addition, the force that causes the handle portion 20 to shrink inward in the longitudinal direction (X direction) can be easily released along the seal portion (bottom end seal 52) that is tapered toward the main body 10, so the force that causes the handle portion 20 to shrink inward in the longitudinal direction (X direction) can be further weakened. As a result, in the third embodiment, the handle portion 20 is further prevented from stretching or deforming, and a packaging bag 100 that is easy to hold and has excellent stability can be provided with even higher precision (see FIG. 7).

In addition, in the third embodiment, as described above, both ends 22B, 22C of the seal portion (lower end seal 52) extend parallel to the longitudinal direction (X direction), so that the force that causes the handle portion 20 to shrink inward in the longitudinal direction (X direction) can be released to the outside of the handle portion 20 in the longitudinal direction (X direction) along both ends 22B, 22C of the seal portion (lower end seal 52).

In addition, in the third embodiment, the distance between the upper end 21 and the lower end 22 of the handle portion 20 in the short direction (Y direction) of both ends 23, 24 of the handle portion 20 is approximately constant, so that the strength of both ends 23, 24 of the handle portion 20 is maintained, and stretching and deformation of the handle portion 20 and the main body 10 can be suppressed when carrying the packaging bag 100 contained in the main body 10.

This is believed to further weaken the force that causes the handle portion 20 to shrink inward in the longitudinal direction (X direction). Therefore, in the third embodiment, it is possible to provide a packaging bag 100 that is easy to hold and has excellent stability with even greater precision (see Figure 7).

The present invention will now be described in more detail with reference to examples. The evaluation of the examples and comparative examples was carried out under the following conditions.

[Packaging bag (test specimen)]
As a test specimen, a packaging bag 100 containing 10 individually packaged objects (packaged objects) P in a main body 10 is prepared (see FIG. 1). The material of the packaging bag 100 is a polyethylene (PE) film having a thickness of about 35 μm. The packaging bag 100 has a structure in which the PE film is made into a bag shape by side sealing and further folded into a gusset shape. The dimensions of the packaging bag are about 191 mm in the longitudinal direction (X direction), about 101 mm in the depth direction (Z direction), and about 360 mm in the height direction (Y direction). In addition, a substantially rectangular handle portion 20 extending in the longitudinal direction (X direction) is formed at the center 11a of the upper surface 11 of the main body 10 of the packaging bag 100. The dimensions of the handle portion 20 are about 190 mm in the longitudinal direction (X direction), about 0.5 mm in the thickness direction (Z direction), and about 60 mm in the height direction (Y direction). A finger hook 30 (slit S) is formed in the center 25 of the handle 20. The slit S of the finger hook 30 is curved (arc-shaped) and convex toward the lower end 22 of the handle 20. The handle 20 is bonded with a seal 50 (upper end seal 51, lower end seal 52, side end seal 53, and side end seal 54) so that the handle 20 is four-ply at both ends 23 and 24 in the longitudinal direction (X direction) and two-ply near the center 25. The lower end seal 52 of the seal 50 is formed at the lower end 22 of the handle 20 to seal the upper part (upper surface 11) of the main body 10. The center 51A of the upper end seal 51, the center 52A of the lower end seal 52, and the part surrounded by the side end seals 53 and 54 constitute the center 25 of the handle 20.

[Individually packaged item (packaged item)]
The individual packages P were made of tissue paper (dimensions: height approx. 38 mm, width approx. 179 mm, length approx. 100 mm, weight approx. 120 g) in which the paper sheets were folded alternately and stacked so that they could be pulled out one by one in a pop-up style. The individual packages (packaged items) P were contained in the main body 10 of the packaging bag 100 so that the stacking direction of the paper sheets was the length direction (X direction) of the packaging bag 100, the width direction was the height direction (Y direction) of the packaging bag 100, and the length direction was the depth direction (Z direction) of the packaging bag 100 (see FIG. 1).

[Easy to hold]
A user placed the index finger, middle finger, ring finger, and little finger of his right hand on the finger loop portion 30 of the packaging bag 100 containing the packaged item (individually packaged item P), grasped the handle portion 20 of the packaging bag 100, and moved it back and forth 10 times like a pendulum in a range of 180°. The degree of tightness of the fingers was evaluated according to the following criteria. In this test, the results of the test performed by five users were scored, and the average value was used to evaluate according to the following criteria. An average value of 3.0 or more was evaluated as easy to hold (good).
5 points: No tightness felt on fingers 4 points: Very slight tightness felt on fingers 3 points: Slight tightness felt on fingers 2 points: Tightness felt on fingers 1 point: Strong tightness felt on fingers ◎: 4.5 or more ○: 4.0 to 4.4
△: 3.5 to 3.9
×: 3.4 or less

[Stability]
As in the test for ease of holding, the stability of the packaging bag 100 was evaluated according to the following criteria when the handle 20 of the packaging bag 100 was grasped and moved back and forth 10 times in a range of 180° like a pendulum. In this test, the results of the test performed by five users were scored, and the average value was used to evaluate the stability according to the following criteria. In addition, an average value of 3.0 or more was evaluated as stable (good).
5 points: The packaged item does not shake; 4 points: The packaged item shakes very slightly; 3 points: The packaged item shakes slightly; 2 points: The packaged item shakes; 1 point: The packaged item shakes strongly; ◎: 4.5 or more; ○: 4.0 to 4.4
△: 3.5 to 3.9
×: 3.4 or less

The following describes examples and comparative examples.

[Example 1]
In the test specimen (packaging bag 100), the entire bottom seal 52 (center portion 52A, end portion 52B, end portion 52C) was provided with a handle portion 20 that curved toward the main body 10 (center portion 52A of bottom seal 52 was convex toward the main body 10) (see Figs. 1 and 2). The manufactured packaging bag 100 was evaluated for ease of holding and stability. The results are shown in Table 1.

[Example 2]
The product was produced and evaluated in the same manner as in Example 1, except that the handle portion 20 having the protrusions F1 and F2 was provided between the center portion 52A of the bottom end seal 52 and both end portions 52B and 52C (see FIG. 6).

[Example 3]
The lower end seal 52 was produced and evaluated in the same manner as in Example 1, except that the central portion 52A of the lower end seal 52 was tapered (tapered) toward the tip portion T1 (toward the main body 10) and the ends 52B and 52C of the lower end seal 52 were provided with the handle portion 20 extending parallel to the longitudinal direction (X direction) of the handle portion 20 (see FIG. 7). The results are shown in Table 1.

[Comparative Example 1]
The product was produced and evaluated in the same manner as in Example 1, except that the handle portion 20 was provided such that the entire bottom end seal 52 (center portion 52A, end portion 52B, end portion 52C) extended parallel to the longitudinal direction (X direction) of the handle portion 20 (see FIG. 8). The results are shown in Table 1.

[Comparative Example 2]
The two elliptical finger hooks 30, 40 (slits S1, S2) were arranged in the longitudinal direction (X direction) of the handle 20 so as to be substantially symmetrical (the central portion 31 of the finger hook 30 and the central portion 41 of the finger hook 40 were arranged on the lower end 22 side of the handle 20, and both ends 32, 33 of the finger hook 30 and both ends 42, 43 of the finger hook 40 were arranged on the upper end 21 side of the handle 20), the dimensions of the finger hooks 30, 40 were such that the major axis was about 30 mm in the longitudinal direction (X direction) of the handle 20, the minor axis was about 15 mm in the height direction (Y direction) of the handle 20, and the distance between the finger hooks 30 and 40 in the longitudinal direction (X direction) was about 20 mm at the shortest (see FIG. 9). Except for this, the packaging bag 100 was produced and evaluated in the same manner as in Example 1. The results are shown in Table 1.

As can be seen from Table 1, the configuration in which the central portion 52A of the bottom seal 52 in the handle portion 20 of the packaging bag 100 is convex toward the main body 10 was both easy to hold and stable (Examples 1 to 3).

In contrast, in a configuration in which the entire bottom end seal 52 of the handle portion 20 of the packaging bag 100 extends parallel to the longitudinal direction (X direction) of the handle portion 20, both ease of holding and stability were inferior (Comparative Examples 1 and 2).

From these results, it was found that a packaging bag 100 in which the central portion 52A in the longitudinal direction (X direction) of the seal portion (lower end seal 52) extending in the longitudinal direction (X direction) of the handle portion along the lower end 22 of the handle portion 20 is convex toward the main body 10 is easy to hold and has excellent stability.

Although the embodiment of the present invention has been described above, the present invention is not limited to a specific embodiment, and various modifications and variations are possible within the scope of the invention described in the claims.

100 Packaging bag P Individually packaged body (packaged body)
10 Main body 11 Top surface 11a Center 12 Bottom surface 13 Front surface 14 Back surface 15, 16 Side surface 20 Handle portion 21 Top end 22 Bottom end 22A Center portion 22B, 22C End portion E1, E2 End portion F1, F2 Convex portion T1 Tip portion T2, T3 Inclined portion 23, 24 End portion 25 Center portion 30 Finger hook portion 30a Bottom end 31 Center portion 32, 33 End portion S Slit 50 Sealed portion 51 Top end seal 51A Center portion 52 Bottom end seal 52A Center portion M Top portion 52B, 52C End portion 53, 54 Side end seal R Reinforced portion H Finger

Claims (7)

A main body that accommodates the packaged object;
A handle portion whose lower end is connected to an upper portion of the main body;
A packaging bag having a finger hook portion formed in the center of the handle,
a linear upper end seal portion formed at an upper end of the handle portion and extending in a longitudinal direction of the handle portion along the upper end;
a linear bottom seal portion formed at a bottom end of the handle portion and extending in a longitudinal direction of the handle portion along the bottom end;
and linear side end seal portions formed on both end sides of the central portion of the handle portion and extending in a short direction of the handle portion along the both end portions of the handle portion,
A central portion of the lower end seal portion, which occupies 40% to 60% of the entire lower end of the handle portion in the longitudinal direction, is convex toward the main body,
A reinforcing portion is formed on the inside of the handle portion and surrounds the finger hook portion,
the reinforcing portion is composed of the linear upper end seal portion, the linear lower end seal portion, and the linear side end seal portion ,
The finger hook portion is formed with a slit extending in the longitudinal direction,
The packaging bag , wherein the slit is convex toward a lower end side of the handle portion . The packaging bag according to claim 1, in which the center portion of the bottom seal portion curves toward the main body. The packaging bag according to claim 1, wherein the central portion of the bottom seal portion is tapered toward the main body. The packaging bag according to any one of claims 1 to 3, wherein the center portion of the bottom end seal portion faces the finger hook portion in the short direction of the handle portion. The packaging bag according to claim 1 , wherein both end portions of the bottom seal portion other than the central portion are convex toward an upper end of the handle portion. The packaging bag according to claim 1 , wherein both ends of the bottom seal portion extend parallel to the longitudinal direction. The packaging bag according to claim 1 , wherein an upper portion of the main body is sealed by the bottom end seal portion.

Images