JP2019059515A - Packaging bag - Google Patents

Abstract

To provide a packaging bag capable of suppressing a revere flow of air.SOLUTION: The packaging bag has: a body 10 that houses a packaged article; a grip 20 that is provided to an upper part of the body; and an air hole 80 that is provided inside the grip. The air hole has: a first opening 72 that is disposed at a lower end of the grip in a height direction and is communicated with the body; and a second opening 73 that is disposed at an end of the grip in a longitudinal direction orthogonal to the height direction and is communicated with the outside of the packaging bag. The air hole is communicated with the first opening and the second opening.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a packaging bag.

  Products such as toilet paper are stored and transported in a state of being contained in a packaging bag. In such a packaging bag, air may enter into the packaging bag when storing an article. If the packaging bag is sealed while the air is in, there is no escape place for the air, and there is a risk that the packaging bag may expand or rupture depending on the storage environment of the product or transportation. Therefore, the packaging bag of this type is provided with an air hole for letting the air escape to the outside.

  For example, the packaging bag which equips the upper end part of the main-body part which accommodates a to-be-packaged thing with a handle part is disclosed by Unexamined-Japanese-Patent No. 2010-202252 (patent document 1). In this packaging bag, an air hole for air extraction is provided at the boundary between the handle portion and the main body portion and at the upper end portion of the handle portion.

Unexamined-Japanese-Patent No. 2010-202252

  However, in the conventional packaging bag, air tends to flow backward from the air hole to the inside of the packaging bag, and the packaging bag can not be sufficiently prevented from swelling and rupture. In addition, due to the backflow of air, foreign matter such as dust and dirt may be mixed in the packaging bag and the product contained in the packaging bag may be contaminated.

  An object of the present invention is to provide a packaging bag capable of suppressing backflow of air.

  In order to solve the above-mentioned subject, the 1st mode concerning the present invention is provided in the main part which stores a to-be-wrapped object, the handle part provided in the upper part of the main part, and the inside of the handle part. An air hole, the air hole being disposed at the lower end in the height direction of the handle and communicating with the main body, and the height of the handle A second opening disposed at a longitudinal end orthogonal to the longitudinal direction and communicating with the outside of the packaging bag, the air hole communicating with the first opening and the second opening; Provide a packaging bag.

  In the first aspect, the air hole provided inside the handle of the packaging bag, the first opening communicating with the main body accommodating the package, and the second opening communicating with the outside of the packaging bag And are in communication. With such a configuration, when the air pressure on the outside of the first opening (inside the main body) is high, the air on the outside of the first opening (inside the main body) is held by the handle via the first opening. It flows into the inside of the air hole provided in the part, and the air pressure inside the air hole also becomes high. Then, when the air pressure inside the air hole becomes high, the air inside the air hole flows out to the outside of the second opening (outside the packaging bag) through the second opening, and from the first opening to the second opening There is a flow of air towards the department.

  Therefore, in the first aspect, air on the outside of the first opening (inside the bag body) can pass from the first opening to the outside of the second opening (outside the packaging bag). In addition, the air can easily flow from the first opening to the outside of the second opening (outside of the packaging bag), so that the packaging bag can be prevented from swelling and breaking.

  In the first aspect, the first opening is disposed at the lower end of the handle, whereas the second opening is disposed at the longitudinal end of the handle, The inflow direction of the air at the first opening and the outflow direction of the air at the second opening are substantially orthogonal to each other. In such a configuration, the air pressure on the outside of the first opening (inside the main body) is reduced, and the air pressure inside the air hole is lower than the air pressure on the outside of the second opening (outside the packaging bag) Thus, when air outside the second opening (outside the packaging bag) flows into the air hole through the second opening, the air flowing from the second opening is further added to the first opening. In order to flow into the main body through the air hole, the flow direction of the air inside the air hole must be largely changed.

  That is, in the first aspect, the air inside the air hole is less likely to flow from the second opening toward the first opening. Thereby, in the first aspect, the backflow of air can be suppressed. Further, by suppressing the backflow of air, it is possible to prevent foreign substances such as dust and dirt from being mixed in the packaging bag and contaminating the product contained in the packaging bag.

  Furthermore, in the first aspect, since the second opening is disposed at the longitudinal end of the handle, the opening is not formed at the upper end of the handle. Thereby, when reinforcing the upper end of the handle, it is possible to prevent the occurrence of a portion that can not be reinforced at the upper end of the handle due to the presence of the opening. Therefore, in the first aspect, it is possible to sufficiently reinforce the upper end of the handle portion that is easily applied with force when carrying the packaging bag, and to increase the strength of the handle portion.

  The second aspect provides a packaging bag in which the opening width of the first opening is larger than the opening width of the second opening. In the second aspect, since the opening width of the first opening is larger than the opening width of the second opening, the opening width of the first opening is relatively large, and the opening width of the second opening is relative Small. As a result, air can easily flow into the air hole at the first opening, and air can not easily flow into the air hole at the second opening. Therefore, according to the second aspect, the air can easily flow from the first opening toward the second opening, and the air does not easily flow from the second opening toward the first opening, and the air can not flow into the inside of the packaging bag. Can further suppress backflow.

  In a third aspect, the air hole has a passage having a width larger than the opening width of the first opening and a width smaller than the opening width of the second opening, The first opening communicates with one end, and the second opening communicates with the other end of the passage. In the third aspect, the air hole is provided with a passage whose one end communicates with the first opening and the other end communicates with the second opening in this manner, thereby making it possible to It is possible to form a flow path of air communicating from the first opening to the second opening. Therefore, in the third aspect, the flow of air can be secured from the first opening toward the second opening via the passage.

  From another point of view, in the third aspect, providing such a passage reduces the space through which the air in the air hole flows. Therefore, the air inside the air hole is more difficult to flow from the second opening toward the first opening. Thereby, in the third aspect, it is possible to further suppress the backflow of air from the second opening toward the first opening.

  A fourth aspect provides a packaging bag in which the passage tapers from the first opening side to the second opening side. In the fourth aspect, the inside of the air hole can be tapered by providing the air hole with a passage that tapers from the first opening side toward the second opening side.

  In such a configuration, when the air pressure outside the first opening (inside the main body) increases, the air pressure inside the passage also increases, and the air pressure is efficiently converted into velocity energy in the passage due to the tapered shape. Effect (hereinafter referred to as "nozzle effect") is obtained. Therefore, the air in the passage is likely to flow out from the tip of the passage near the second opening, and the flow of air from the passage toward the second opening is likely to occur. Thus, in the fourth aspect, the air outside the first opening is more likely to pass from the first opening to the outside of the second opening.

  In the fourth aspect, since the inside of the air hole has a tapered shape that tapers from the first opening side toward the second opening side, the opening width of the second opening with respect to the width of the passage Becomes relatively smaller. Therefore, air can not easily flow into the passage from the second opening, and the backflow of air into the packaging bag can be suppressed.

  A fifth aspect provides a packaging bag wherein the passage has at least one constriction, the constriction tapering from the first opening side to the second opening side. In the fifth aspect, at least one narrowing portion which tapers from the first opening side toward the second opening side is formed in the passage to make the portion where the narrowing portion is formed in the passage be tapered. be able to.

  Since the above-described nozzle effect is obtained even in the portion where the narrowed portion in the passage is provided by such a tapered narrowed portion, the air in the passage flows out from the tip near the second opening of the narrowed portion. This facilitates the flow of air from the narrowed portion toward the second opening. Thus, in the fifth aspect, the air outside the first opening (inside the main body) is further directed from the first opening toward the outside of the second opening (outside the packaging bag) through the passage. It becomes easy to go through.

  In the fifth aspect, the narrowed portion in the passage has a tapered shape that tapers from the first opening side toward the second opening side, so that the width of the passage on the first opening side can be reduced. The width of the tip on the second opening side of the narrowed portion becomes relatively smaller. Therefore, it is difficult for air to flow from the narrowed portion to the first opening side, and it is possible to suppress backflow of air from the second opening toward the first opening.

  A sixth aspect provides a packaging bag wherein the constriction is adjacent to the first opening. In the sixth aspect, since the narrowing portion which tapers from the first opening side toward the second opening side is disposed adjacent to the first opening, the first opening with respect to the width of the passage is The opening width of the part becomes relatively large. Therefore, in the sixth aspect, the air outside the first opening (inside the main body) can easily flow into the passage from the first opening.

  A seventh aspect provides a packaging bag, wherein the constriction portion is constituted by an inclined side which inclines to the inside of the passage. In the seventh aspect, by forming the narrowed portion of the passage with such inclined sides, when the air pressure in the passage becomes higher toward the first opening, the inclined side of the narrowed portion is pushed toward the second opening The constriction of the passage widens. On the other hand, when the air pressure in the passage increases toward the second opening, the inclined side of the narrowed portion is pushed toward the first opening, and the narrowed portion of the passage narrows.

  As described above, in the present embodiment, the inclined side provided in the passage can function as a check valve. The function of the check valve makes it easier for the air to flow from the first opening toward the second opening, and makes it more difficult for the air to flow from the second opening to the first opening. Therefore, in the seventh aspect, backflow of air into the inside of the packaging bag can be reliably suppressed.

  An eighth aspect provides a packaging bag, wherein the air hole is formed by heat sealing. In the eighth aspect, in the case where two resin films are bonded by heat sealing to form an air hole by heat sealing to form a handle of the packaging bag, two sheets are formed together with the formation of the air hole. The resin film of can be pasted together. In addition, air holes can be formed in the handle at the same time as bonding of the resin film. Therefore, in the eighth aspect, the air holes can be easily arranged with respect to the handle portion of the packaging bag.

  According to one aspect of the present invention, it is possible to provide a packaging bag capable of suppressing backflow of air.

It is a figure showing the packing bag concerning the embodiment of the present invention. It is a figure which shows the holding part vicinity of the packaging bag which concerns on embodiment (1st Embodiment) of this invention. It is the figure which expanded a part of handle part of the packaging bag of FIG. It is the figure which expanded a part of handle part of the packaging bag which concerns on embodiment (2nd Embodiment) of this invention. It is the figure which expanded a part of handle part of the packaging bag which concerns on embodiment (3rd Embodiment) of this invention. It is the figure which expanded a part of handle part of the packaging bag which concerns on embodiment (4th Embodiment) of this invention. It is the figure which expanded a part of handle part of the packaging bag which concerns on embodiment (5th Embodiment) of this invention. It is a figure explaining the test method (at the time of load) of an air leak test. It is a figure explaining the test method (after load) of an air leak test. It is a figure explaining the test method of an air return test. It is a figure which shows the handle part (comparative example 1) of the conventional packaging bag. It is a figure which shows the handle part (comparative example 2) of the packaging bag provided with the air hole which has a linear channel. It is a figure which shows the handle part (reference example 1) of the packaging bag provided with the air hole which has a linear-like channel | path provided with a constriction part.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a view showing a packaging bag according to an embodiment (first embodiment) of the present invention. FIG. 2 is a view showing the vicinity of the handle of the packaging bag according to the embodiment (first embodiment) of the present invention. FIG. 3 is an enlarged view of a part of the handle of the packaging bag of FIG. In the following description, the same reference numerals may be given to parts common to the respective drawings and the description may be omitted.

  In FIGS. 1 and 2, the packaging bag 100 includes a bag body 10, a handle 20, and finger rests 30 and 40. The bag body 10 constitutes a main body of a packaging bag in which a package (toilet paper) T is accommodated. The bag body 10 can be formed of a soft resin film or the like. The bag body 10 has a structure in which a resin film is formed into a bag shape by side sealing, and the bag-like resin film is further folded in a gusset shape (see FIGS. 1 and 2).

  The material of the resin film forming the bag body 10 is arbitrary. For such a resin film, for example, a resin film such as polyethylene (PE), polypropylene (PP), PE-ethylene vinyl alcohol copolymer (EVOH) -PE laminate (PE / EVOH / PE), etc. should be used. Can. Moreover, the thickness of the resin film is arbitrary. For example, when PE or PE / EVOH / PE is used as the resin film, the thickness of the resin film can be 10 to 70 μm, preferably 15 to 60 μm, and more preferably 20 to 50 μm.

  In the bag body 10, twelve roll-shaped toilet papers T are accommodated as packaged objects (see FIG. 1). The form of the package is not limited to a roll, and may be stored in another form such as a laminate. Moreover, the to-be-packaged body accommodated in the bag main body 10 is not limited to toilet paper, and articles | goods, such as a kitchen paper, a paper diaper for babies or nursing, and a sanitary napkin, can be accommodated.

  Furthermore, the number of articles stored in the bag body 10 as a package is not limited, and may be one or more as shown in FIG. Note that, in the example shown in FIG. 1, a total of 12 toilet papers T are accommodated in the bag body 10 in a state in which four roll-shaped toilet papers T arranged in one stage are stacked in three stages. However, the arrangement of the packages to be accommodated in the bag body 10 is not limited to this arrangement, and for example, even if 12 or more toilet papers T are arranged in a single row, they may be accommodated in the bag body 10 good.

  The handle 20 is provided on the upper portion 11 of the bag body 10 as shown in FIGS. 1 and 2, and constitutes a portion for gripping the packaging bag 100 with fingers. The handle 20 can be formed of a resin film or the like in the same manner as the bag body 10. The handle 20 is formed when the bag body 10 is sealed by heat sealing (heat sealing) not shown.

  The handle 20 is composed of a base 12 continuous with the bag body 10 (see FIG. 2). The position at which the handle 20 is provided is not limited to the upper portion 11 of the bag body 10, but may be the side surface of the bag body 10. In addition, heat sealing (heat seal) can be performed, for example, by a method (stamp method) in which the above-mentioned gusset-folded resin film is stamped with a heat plate for forming a holder.

  In the handle 20, the folded resin film is used as the base 12 in the form of four sheets at both ends 23 and 24 in the longitudinal direction (X direction in FIG. 2) of the handle 20. The sheets are adhered to each other by the seal portions 50 and 60 formed of the heat seal H respectively. The seal portions 50 and 60 are disposed at the upper end 21 and the lower end 22 of the handle 20 so as to sandwich the finger rests 30 and 40 vertically as shown in FIGS. 1 and 2. The seal portions 50, 60 have a function of reinforcing the handle 20 simultaneously with the formation of the handle 20 by bonding a resin film.

  The finger hooks 30 and 40 are disposed inside the handle 20 and constitute a portion to which a finger is hooked when gripping the handle 20. In the present embodiment, as shown in FIGS. 1 and 2, a part of each of the finger rests 30 and 40 is formed by an elliptical slit.

  A central portion 31 of the finger hook 30 is disposed on the lower end 22 side of the handle 20, and both end portions 32 and 33 are disposed on the upper end 21 of the handle 20. On the other hand, in the finger hook 40, the central portion 41 is disposed on the lower end 22 side of the handle 20, and both ends 42 and 43 are disposed on the upper end 21 side of the handle 20.

  In addition, the shape of the slit which comprises the finger hooks 30 and 40 is not limited to elliptical shape, For example, you may provide a linear slit. Moreover, the form of the slit which comprises the finger hooks 30 and 40 is arbitrary, for example, it can form by a perforation and can form a finger hook by breaking this perforation. Furthermore, such finger hooks are not limited to two finger hooks, and one finger hook may be provided.

  In addition, the handle 20 may be provided with a reinforcing film (not shown) covering the finger rests 30 and 40. This reinforcing film can be formed of a strip-shaped resin film. The material of the reinforcing film is optional, and may be the same as or different from the material of the resin film constituting the handle 20.

  As a resin film which comprises such a reinforcement film, the layered product (PE) of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and PE-ethylene vinyl alcohol copolymer (EVOH) -PE is mentioned, for example A resin film such as / EVOH / PE) can be used. By providing such a reinforcing film, it is possible to reinforce the portion where the finger hooks 30 and 40 of the handle 20 are provided.

  Moreover, the thickness dimension of a reinforcement film is 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 in such a range, it is possible to prevent the handle 20 from being stretched or broken. Moreover, a reinforcement film can be reliably bonded to the handle 20 by the above-mentioned heat welding etc.

  Also, instead of, or together with such a reinforcing film, a reinforcing seal (not shown) may be provided. As such a sealing portion for reinforcement, for example, a plurality of heat sealing (heat sealing H) formed in the same manner as the sealing portions 50 and 60 in a region where the finger hooks 30 and 40 of the handle 20 are provided. Can be arranged in a stripe. The direction in which such striped seal portions are arranged is not limited, and may be either the longitudinal direction (X direction in FIG. 2) or the height direction (Y direction in FIG. 2) of the handle 20.

  The handle 20 is provided with air holes 70 and 80 for communicating the bag body 10 with the outside of the packaging bag 100 (see FIGS. 1 and 2). The air holes 70 and 80 are disposed on both ends 23 and 24 of the handle 20 so as to sandwich the finger hooks 30 and 40 in the longitudinal direction (X direction in FIG. 2) of the handle 20 (FIGS. 1 and 2) reference). In the present specification, the air holes 70, 80 are an example of the air holes of the present invention.

  The air holes 70, 80 are formed between the two resin films. Specifically, at the portion where the four bases 12 of both ends 23 and 24 in the longitudinal direction (X direction in FIG. 2) of the handle 20 are stacked, the air holes 70 and 80 are formed between two resin films. Two spaces are formed respectively.

  The air holes 70 and 80 are partially configured by the seal portions 71 and 81. The seal parts 71 and 81 are formed by heat sealing (heat seal H) as in the case of the seal parts 50 and 60. The air holes 70 and 80 are not limited to the formation by heat fusion but may be formed by applying an adhesive, an adhesive or the like. Thus, the air hole 70 is configured to be surrounded by a part of the seal part 50, a part of the seal part 60, the seal part 71, and the one end 23 of the handle 20 between two resin films. Further, the air hole 80 is configured by being surrounded by a part of the seal part 50, a part of the seal part 60, the seal part 81, and the other end 24 of the handle 20 between two resin films.

  The air holes 70, 80 have first openings 72, 82 and second openings 73, 83. In the present specification, the first openings 72 and 82 and the second openings 73 and 83 are examples of the first opening and the second opening which constitute a part of the air hole of the present invention. In the present embodiment, since the air holes 70 and 80 have the same structure except that they are symmetrical, the air holes will be described using the air holes 80, and the description of the air holes 70 will be omitted. 3 to 13).

  In the packaging bag 100 according to the present embodiment, as shown in FIG. 3, the first opening 82 is disposed at the lower end 22 of the handle 20 in the height direction (Y direction in FIG. 3). It communicates in the main body 10. On the other hand, the second opening 83 is disposed at the other end 24 of the longitudinal direction (X direction in FIG. 3) orthogonal to the height direction (Y direction in FIG. 3) of the handle 20. It communicates with the outside of. Thus, the inside of the bag body 10 of the packaging bag 100 is in communication with the outside of the packaging bag 100 via the air hole 80.

  Moreover, in the packaging bag 100 which concerns on this embodiment, as shown in FIG. 3, opening width OW1 of the 1st opening part 82 is larger than opening width OW2 of the 2nd opening part 83. As shown in FIG. That is, in the present embodiment, the opening width OW 2 of the second opening 83 is smaller than the opening width OW 1 of the first opening 82.

  In the present embodiment, the first opening 82 communicating with the bag body 10 in which the packaged object (toilet paper) T is accommodated in the air hole 80 provided inside the handle 20 of the packaging bag 100, and the packaging bag A second opening 83 communicating with the outside of 100 is provided (see FIG. 3). With such a structure, when the air pressure on the outside of the first opening 82 (inside the bag body 10) is high, the air on the outside of the first opening 82 (inside the bag body 10) The air flows into the inside of the air hole 80 and the air pressure inside the air hole 80 also becomes higher. Then, when the air pressure inside the air hole 80 becomes high, the air inside the air hole 80 flows out to the outside of the second opening 83 (the outside of the packaging bag 100) through the second opening 83.

  Thereby, a flow of air is generated from the first opening 82 toward the second opening 83. Therefore, in the present embodiment, the air outside the first opening 82 (inside the bag body 10) passes through the air hole 80 from the first opening 82 to the outside of the second opening 83 (outside the packaging bag 100) Can pass through.

  Further, in the present embodiment, the first opening 82 is disposed at the lower end 22 of the handle 20 in the height direction (Y direction in FIG. 3), while the second opening 83 is a part of the handle 20. It is disposed at the other end 24 in the longitudinal direction (X direction in FIG. 3). That is, in the present embodiment, the inflow direction of air at the first opening 82 (D1 direction in FIG. 3) and the outflow direction of air at the second opening 83 (D2 direction in FIG. 3) are substantially orthogonal.

  In such a structure, the air outside the second opening 83 (outside the packaging bag 100) flows backward into the air hole 80 through the second opening 83, and the bag main body from the first opening 82. In order to flow backward into the interior of the air port 10, the air flow direction inside the air hole 80 has to be changed to a substantially orthogonal direction (from the D2 direction to the D1 direction in FIG. 3). That is, in the inside of the air hole 80, the air is less likely to flow from the second opening 83 toward the first opening 82.

  Therefore, in the present embodiment, the backflow of air can be suppressed, and the packaging bag 100 can be prevented from being inflated or ruptured. Further, in the present embodiment, by suppressing backflow of air, foreign substances such as dust and dust are mixed in the packaging bag 100, and the packaged object (toilet paper) T contained in the packaging bag 100 is contaminated. Can be prevented.

  Furthermore, in the present embodiment, since the second opening 83 is disposed at the other end 24 in the longitudinal direction (X direction in FIG. 3) of the handle 20, an opening is formed at the upper end 21 of the handle 20. Not. With such a configuration, when reinforcing the upper end 21 of the handle 20, it is possible to prevent the occurrence of a portion that can not be reinforced at the upper end 21 of the handle 20 due to the presence of the opening. Therefore, in the present embodiment, since the upper end 21 of the handle 20 which is easily applied with force when carrying the packaging bag 100 can be sufficiently reinforced, the strength of the handle 20 of the packaging bag 100 can be increased.

  Further, in the present embodiment, since the opening width OW1 of the first opening 82 is larger than the opening width OW2 of the second opening 83, air easily flows into the air hole 80 in the first opening 82, At the second opening 83, air does not easily flow into the air hole. As a result, air can easily flow from the first opening 82 toward the second opening 83, and air can not easily flow from the second opening 83 toward the first opening 82. Therefore, according to the present embodiment, the backflow of air into the inside of the packaging bag 100 can be further suppressed.

  FIG. 4: is the figure which expanded a part of handle part of the packaging bag which concerns on embodiment (2nd Embodiment) of this invention. In the packaging bag 100 of the present embodiment, the air hole 80 further has a passage 84. The passage 84 is formed between the two resin films. The passage 84 has a width PW1 smaller than the opening width OW1 of the first opening 82 and a width PW2 larger than the opening width OW2 of the second opening 83.

  In the passage 84, the first opening 82 is in communication with one end 84A of the passage 84, and the second opening 83 is in communication with the other end 84B of the passage 84. The passage 84 is formed by heat sealing (heat seal H) in the same manner as the seal portions 50, 60, 71, 81. The passage 84 is an example of a passage that constitutes a part of the air hole of the present invention.

  The passage 84 further has a first passage portion 85 and a second passage portion 86, as shown in FIG. The first passage portion 85 communicates with the first opening 82 and extends in the height direction (Y direction in FIG. 4) of the handle 20. On the other hand, the second passage portion 86 communicates with the first passage portion 85, extends in the longitudinal direction (X direction in FIG. 4) of the handle 20, and communicates with the second opening 83.

  Further, in the present embodiment, as shown in FIG. 4, the passage 84 is tapered from the side of the first opening 82 toward the side of the second opening 83. Specifically, the first passage portion 85 of the passage 84 is tapered from the side of the first opening 82 toward the side of the second passage portion 86, and the second passage portion 86 is on the side of the first passage portion 85. Are tapered toward the second opening 83 side.

  In the present embodiment, the air hole 80 is provided with the passage 84 in which one end 84A communicates with the first opening 82 and the other end 84B communicates with the second opening 83. A flow passage of air can be formed in the interior of 80 from the first opening 82 to the second opening 83. Therefore, in the present embodiment, the flow of air can be maintained from the first opening 82 toward the second opening 83.

  On the other hand, by providing such a passage 84 in the air hole 80, the space through which the air inside the air hole 80 flows becomes smaller. As a result, the air inside the air hole 80 does not easily flow from the second opening 83 toward the first opening 82. Therefore, in the present embodiment, the backflow of air can be further suppressed from the second opening 83 toward the first opening 82.

  Further, in the present embodiment, the passage 84 provided in the air hole 80 is the first passage portion 85 extending in the height direction of the handle 20 (Y direction in FIG. 4) and the longitudinal direction of the handle 20 (X in FIG. 4). And a second passage portion 86 extending in the direction). Therefore, the structure (from the second opening 83) in which the inflow direction of air at the first opening 82 (direction D1 in FIG. 4) and the outflow direction of air at the second opening (direction D2 in FIG. 4) The structure for suppressing the backflow of air toward the opening 82 can be reliably formed inside the air hole 80.

  In the present embodiment, the first passage portion 85 of the passage 84 extends in the height direction (Y direction in FIG. 4) of the handle 20, and the second passage portion 86 extends in the longitudinal direction of the handle 20 (X in FIG. 4). Direction). In such a configuration, the shape of the passage 84 is from the first opening 82 to the second opening 83 because the communication portion CP at which the first passage portion 85 and the second passage portion 86 communicate with each other is a corner portion. It has a shape extending in an L shape toward the end (see FIG. 4).

  Furthermore, in the present embodiment, the air hole 80 can be tapered by providing the air hole 80 with the passage 84 that tapers from the first opening 82 side toward the second opening 83 side. . Due to this tapered shape, when the air pressure outside the first opening 82 (inside the bag body 10) increases, the air pressure inside the passage 84 also increases, and the above-described nozzle effect is obtained in the passage 84.

  As a result, the air in the passage 84 is likely to flow out from the end (end 84 B) of the passage 84 near the second opening 83 and the flow of air from the passage 84 toward the second opening 83 is easily generated. . Thus, in the present embodiment, the air outside the first opening 82 (inside the bag body 10) is more likely to pass from the first opening 82 through the passage 84 toward the outside of the second opening 83. Become.

  Further, in the present embodiment, the inside of the air hole 80 has a tapered shape that tapers from the first opening 82 side to the second opening 83 side, so the width of the passage 84 (second passage portion 86 The opening width OW2 of the second opening 83 becomes relatively smaller than the width PW2 of the Therefore, in the present embodiment, the air does not easily flow into the passage 84 from the second opening 83, and the backflow of the air into the packaging bag 100 can be suppressed.

  In the present embodiment, the passage 84 is divided into a first passage portion 85 and a second passage portion 86, and the first passage portion 85 is tapered toward the second passage portion 86 from the first opening 82 side. Thus, the second passage portion 86 tapers from the first passage portion 85 side to the second opening 83 side. That is, in the present embodiment, two tapered passage portions are provided in the passage 84. Thereby, in the present embodiment, the above-described nozzle effect is increased, and the air outside the first opening 82 (inside the bag body 10) is transmitted from the first opening 82 through the passage 84 to the second opening 83. Are more likely to pass through to the outside of the (the outside of the packaging bag 100).

  FIG. 5: is the figure which expanded a part of handle part of the packaging bag which concerns on embodiment (3rd Embodiment) of this invention. In the present embodiment, a narrowing portion 87 is provided in the passage 84. The narrowed portion 87 is tapered from the first opening 82 side to the second opening 83 side. The narrowed portion 87 is disposed in the passage 84 adjacent to the first opening 82. Further, the constriction portion 87 is configured by an inclined side S which inclines to the inside of the passage 84. The narrowed portion 87 is an example of at least one narrowed portion in the packaging bag of the present invention, and the inclined side is an example of the inclined side in the packaging bag of the present invention.

  Specifically, as shown in FIG. 5, a first narrowing portion 88 is provided as a narrowing portion 87 in the first passage portion 85 of the passage 84. The first narrowed portion 88 is tapered from the first opening 82 side to the second passage portion 86 side. Also, the first narrowed portion 88 is disposed in the first passage portion 85 of the passage 84 adjacent to the first opening 82. Furthermore, the first narrowed portion 88 is configured by an inclined side S (first inclined side S1) that inclines to the inside of the first passage portion 85 of the passage 84.

  In the present embodiment, since the narrowed portion 87 (first narrowed portion 88) that tapers from the first opening 82 side toward the second opening 83 is provided in the passage 84 (first passage portion 85). The portion of the passage 84 (first passage portion 85) in which the narrowed portion 87 (first narrowed portion 88) is formed can be tapered.

  By providing such a tapered narrowed portion 87 (first narrowed portion 88) in the passage 84 (first passage portion 85), the narrowed portion 87 (in the first passage portion 85) in the passage 84 is formed. The above-described nozzle effect can be obtained even in the portion where the portion 88) is provided. Therefore, the air in the passage 84 (first passage portion 85) is directed from the tip 88A closer to the second opening 83 of the narrowed portion 87 (first narrowed portion 88) to the second opening 83 (second passage portion 86) side. Flow to the second opening 83 from the narrowed portion 87 (the first narrowed portion 88). Thus, in the present embodiment, the air on the outside of the first opening 82 (inside the bag body 10) passes from the first opening 82 to the outside of the second opening 83 via the passage 84 (outside of the packaging bag 100). It is easier to go through).

  Further, in the present embodiment, the narrowed portion 87 in the passage 84 (the first narrowed portion 88 in the first passage portion 85) is from the first opening 82 side to the second opening 83 (second passage portion 86) side. Because of the tapered shape, the width PW1 of the passage 84 (first passage portion 85) on the first opening 82 side is wider than the width 88 of the narrowed portion 87 (first narrowed portion 88). TW1 becomes relatively smaller. Therefore, it is difficult for air to flow from the tip 88A of the narrowed portion 87 (first narrowed portion 88) to the first opening 82 side, and prevents air from backflowing from the second opening 83 toward the first opening 82. can do.

  Further, in the present embodiment, the narrowed portion 87 (first narrowed portion 88) which is tapered from the first opening 82 side toward the second opening 83 (second passage portion 86) is the first opening 82. It is located adjacent to. Therefore, the opening width OW1 of the first opening 82 becomes relatively larger than the width PW1 of the narrowed portion 87 (first narrowed portion 88) of the passage 84 (first passage portion 85). Air on the outer side (inside the bag body 10) can easily flow into the passage 84 (the first passage portion 85) from the first opening 82.

  Furthermore, in the present embodiment, the inclined side S (first inclination) inclining inward of the passage 84 (first passage portion 85) to the narrowed portion 87 of the passage 84 (the first narrowed portion 88 in the first passage portion 85). The narrow portion 87 (the first narrowed portion 88 in the first passage portion 85) of the passage 84 is configured by the side S1).

  In this embodiment, when the air pressure in the passage 84 becomes higher toward the first opening 82 due to such a structure, the inclined side S of the narrowed portion 87 (the first inclined side S1 of the first narrowed portion 88) The narrowed portion 87 (the width TW1 of the tip 88A of the first narrowed portion 88 in the first passage portion 85) in the passage 84 is widened by being pushed toward the opening 83 (second passage portion 86). On the other hand, when the air pressure in the passage 84 becomes higher toward the second opening 83, the inclined side S of the narrowed portion 87 (the first inclined side S1 of the first narrowed portion 88) is pushed toward the first opening 82 and the passage The narrowed portion 87 in the portion 84 (the width TW1 of the tip 88A of the first narrowed portion 88 in the first passage portion 85) is narrowed.

  In the present embodiment, since such an inclined side S (first inclined side S1) exists in the passage 84 (first passage portion 85), air flows from the first opening 82 toward the second opening 83. It becomes easier for the air to flow from the second opening 83 toward the first opening 82 more easily. As a result, the backflow of air into the interior of the packaging bag 100 can be reliably suppressed.

  FIG. 6 is an enlarged view of a part of the handle of the packaging bag according to the embodiment (the fourth embodiment) of the present invention. In the present embodiment, a narrowed portion 87 (second narrowed portion 89) is provided in the second passage portion 86 of the passage 84. The second narrowed portion 89 tapers from the first passage portion 85 side of the passage 84 toward the second opening 83 side. Due to the presence of such a second constriction portion 89, the second passage portion 86 of the passage 84 can be provided with a tapered constriction portion.

  By providing the second narrowed portion 89 having such a tapered shape also in the passage 84 (the second passage portion 86), the narrowed portion 87 in the passage 84 (the second narrowed portion 89 in the second passage portion 86) The above-described nozzle effect can be obtained even in the provided portion. Therefore, the air in the passage 84 (second passage portion 86) is likely to flow out from the tip 89A closer to the second opening 83 of the narrowed portion 87 (second narrowed portion 89) to the second opening 83 side. The flow of air is likely to occur from the portion 87 (second narrowed portion 89) toward the second opening 83.

  Thus, in the present embodiment, the air on the outside of the first opening 82 (inside the bag body 10) passes from the first opening 82 to the outside of the second opening 83 via the passage 84 (outside of the packaging bag 100). It is easier to go through). Therefore, in the present embodiment, the air easily flows from the first opening 82 toward the second opening 83, and the air does not easily flow from the second opening 83 toward the first opening 82. It is possible to further suppress the backflow of air inside the

  Further, in the present embodiment, the second narrowed portion 89 provided in the second passage portion 86 of the passage 84 has a tapered shape that tapers from the first opening 82 side to the second opening 83 side. There is. As a result, the width TW2 of the tip 89A of the second narrowed portion 89 on the second opening 83 side becomes relatively smaller than the width PW1 of the passage 84 on the first opening 82 side. Therefore, in the present embodiment, even in the narrowed portion 87 in the passage 84 (the second narrowed portion 89 in the second passage portion 86), air is less likely to flow from the second opening 83 side to the first opening 82 side. The backflow of air into the interior of the packaging bag 100 can be further suppressed.

  Further, in the present embodiment, the second narrowed portion 89 which tapers from the first passage portion 85 side to the second opening 83 side is adjacent to the first passage portion 85 and the second passage portion 86 of the passage 84. The width PW1 of the first passage portion 85 is relatively larger than the width PW2 of the second narrowed portion 89 of the second passage portion 86. As a result, the air flowing into the first passage portion 85 through the first opening 82 can further easily flow into the second passage portion 86 through the first passage portion 85. Therefore, in the twelfth aspect, the air outside the first opening 82 (inside the bag body 10) passes through the inside of the passage 84 from the first opening 82 toward the second opening 83 and the second opening 83 Is easily discharged to the outside (outside of the packaging bag 100).

  Furthermore, in the present embodiment, the inclined side S (second inclination) inclining to the inside of the passage 84 (second passage portion 86) to the narrowed portion 87 of the passage 84 (the second narrowed portion 89 in the second passage portion 86). The narrowed portion 87 (second narrowed portion 89 in the second passage portion 86) of the passage 84 is configured by the side S2).

  In this embodiment, when the air pressure in the passage 84 becomes higher toward the first opening 82 due to such a structure, the inclined side S of the narrowed portion 87 (the second inclined side S2 of the second narrowed portion 89) As a result, the narrowed portion 87 in the passage 84 (width TW2 of the tip 89A of the second narrowed portion 89 in the second passage portion 86) is widened. On the other hand, when the air pressure in the passage 84 becomes higher toward the second opening 83, the inclined side S of the narrowed portion 87 (the second inclined side S2 of the second narrowed portion 89) becomes the first opening 82 (the first passage portion 85). The narrowing portion 87 in the passage 84 (width TW2 of the tip 89A of the second narrowing portion 89 in the second passage portion 86) is narrowed.

  In the present embodiment, the second inclined side S2 of the second passage portion 86 is provided adjacent to the first passage portion 85, whereby the first opening in the first passage portion 85 of the passage 84 is formed. The air flowing from the side 82 toward the second passage portion 86 can directly strike the second inclined side S2. As a result, the force by which the second inclined side S2 is pushed toward the second passage portion 86 is increased, and the width TW2 of the tip 89A of the second narrowed portion 89 in the second passage portion 86 is easily expanded.

  In the present embodiment, since such an inclined side S (second inclined side S2) is also present in the passage 84 (second passage portion 86), the air from the first opening 82 toward the second opening 83 is used. Is more likely to flow, and air is less likely to flow from the second opening 83 toward the first opening 82. As a result, the backflow of air into the interior of the packaging bag 100 can be reliably suppressed.

  FIG. 7 is an enlarged view of a part of the handle of the packaging bag according to the embodiment (fifth embodiment) of the present invention. In the present embodiment, the shape of the passage 84 is changed from the first opening 82 to the second opening so that the passage 84 becomes a communicating portion CP where the first passage portion 85 and the second passage portion 86 communicate with each other. It has a shape extending in a curve toward 83.

  By providing such a curved passage 84 in the air hole 80, the first passage portion 85 and the second passage portion 86 continue in a curved shape from the first opening 82 toward the second opening 83. The air further easily flows from the first opening 82 toward the second opening 83.

  In the fourth embodiment shown in FIG. 6, the narrowing portion shown in FIG. 5 and FIG. 6 and inclined sides forming the narrowing portion may be provided. By providing the narrowing portion or the inclined side forming the narrowing portion, the function of the above-described nozzle effect or check valve can be obtained also in the fourth embodiment shown in FIG.

  In addition, the dimension of the air hole 80 is not specifically limited, According to the shape of the packaging bag 100, the position of the bag main body 10, etc., it can provide suitably. For example, the width PW1 of the first passage portion 85 of the passage 84, the width PW2 of the second passage portion 86, the opening width OW1 of the first opening 82, the opening width OW2 of the second opening 83, and the tip of the first narrowed portion 88 The width TW1 of 88A and the width TW2 of the tip 89A of the second narrowed portion 89 can be provided in the range of about 1 mm to 40 mm.

  Further, in the present embodiment shown in FIGS. 1 to 6, the air hole 80 is formed by the heat seal H in any case. In these embodiments, when the two resin films are laminated by heat seal H to form the handle 20 of the packaging bag 100, the two resin films can be laminated together with the formation of the air holes 80. . Moreover, the air hole 80 can be formed in the handle 20 simultaneously with the bonding of the resin film, and the air hole 80 can be formed by cutting or melting. Therefore, in the present embodiment, the arrangement of the air holes 80 with respect to the handle 20 of the packaging bag 100 is easy.

  Thus, according to the present embodiment, the bag body 10 is disposed at the lower end 22 in the height direction of the handle 20 inside the handle 20 provided on the bag body 10 that accommodates the packaged object T. Providing an air hole 80 having a communicating first opening 82 and a second opening 83 disposed at the other end 24 in the longitudinal direction orthogonal to the height direction of the handle 20 and communicating with the outside of the packaging bag 100 Thus, the packaging bag 100 capable of suppressing the backflow of air can be provided.

  Hereinafter, the present embodiment will be specifically described using examples. The measurement and evaluation of each example and comparative example were performed as follows.

[Air vent test]
As a test body, the packaging bag 100 (dimension of the bag main body 10: lateral width (X direction in FIG. 1) 233 mm × vertical width (Z direction in FIG. 1) 300 mm, dimension of the handle 20: longitudinal width (X in FIG. 1) Direction) A width of 233 mm × height direction (Y direction in FIG. 1) 58 mm) was produced from a 25 μm thick polyethylene film using a bag making machine. In the packaging bag 100, a handle 20 is provided on the upper portion 11 of the bag body 10. Further, air holes 70 and 80 were provided in the handle 20, and the finger rests 30 and 40 were not provided. A total of 4 rolls of toilet paper (“Eliaire Toilet tissue 60 m single (147 g / roll)” manufactured by Daio Paper Co., Ltd.) in a single tier are stacked in two tiers on the roll-shaped toilet paper 10 Each toilet paper T was stored (see FIG. 1). As shown in FIG. 8, a hard-to-deform flat polystyrene resin plate FP1 (dimensions: horizontal width (Y direction in FIG. 8) 235 mm × vertical width (X direction in FIG. 8) 320 mm × thickness The packaging bag 100 in which the toilet paper T was stored was placed on the 10 mm) of the Z direction in FIG. A flat resin plate FP2 (a resin plate of the same material and size as the resin plate FP1) is placed on the packaging bag 100 placed on the resin plate FP1, and a further weight W is applied on the resin plate FP2. The degree of air release when loading 2.0 kg was evaluated (see FIG. 8 and FIG. 9). The removal of air was evaluated from the distance (cm) between the resin plate FP1 and the resin plate FP2 with the weight placed, according to the following criteria. The distance between the resin plate FP1 and the resin plate FP2 was 13 cm in a state before the weight W was placed on the packaging bag 100 (state in which only the resin plate FP2 was placed). In addition, it is evaluated that the air is easy to be released (〇 good) when the total points of three times 30 seconds, 60 seconds, and 120 seconds after putting the weight W is 10 points or more. When the total score was less than 10 points, it was evaluated that air was difficult to escape (x failure).

5 points: less than 8 cm 4 points: 8 cm or more and less than 9 cm 3 points: 9 cm or more and less than 10 cm 2 points: 10 cm or more and less than 11 cm

[Air return test]
After the above-described air removal test was conducted, as shown in FIG. 10, the degree of air return when the weight W and the resin plate FP2 were removed was evaluated. The return of air was evaluated from the distance (cm) from the resin plate FP1 after removing the weight W and the resin plate FP2 to the top end of the packaging bag 100 according to the following criteria (see FIG. 10). The air return test was started from a state where the weight W and the resin plate FP were placed on the packaging bag 100 and the distance between the resin plate FP1 and the resin plate FP2 was forced to be 5 cm. In addition, the return of air is difficult to return when the total number of points is 10 points or more in total of three times after 30 seconds, 60 seconds, and 120 seconds after removing weight W and resin plate FP2 It evaluated that it was favorable, and when the total point was less than 10 points | pieces, it was evaluated as what is easy to return air (x defect).

5 points: less than 6 cm 4 points: 6 cm or more and less than 7 cm 3 points: 7 cm or more and less than 8 cm 2 points: 8 cm or more and less than 9 cm 1 point: 9 cm or more

  Hereinafter, Examples and Comparative Examples will be described.

Example 1
As shown in FIGS. 1 to 3, an air hole 80 provided in the handle 20 of the packaging bag 100 is disposed at the lower end 22 of the handle 20 and communicates with the inside of the bag body 10 of the packaging bag 100. An opening 82 and a second opening 83 disposed at the other end 24 of the handle 20 in the longitudinal direction (X direction in FIG. 3) and in communication with the outside of the packaging bag 100 (the handle 20) . The results are shown in Table 1.

Example 2
As shown in FIGS. 1, 2 and 4, the air hole 80 is a first passage portion 85 extending in the L-shaped passage 84 (the height direction of the handle 20 (Y direction in FIG. 4) The second embodiment is the same as the first embodiment except that the second passage portion 86 extending in the longitudinal direction (the X direction in FIG. 4) and the communicating portion CP of the corner portion are provided. The results are shown in Table 1.

[Example 3]
As shown in FIG. 1, FIG. 2 and FIG. 5, the air hole 80 has a configuration in which the passage 84 (the first passage portion 85) has the narrowed portion 87 (the first narrowed portion 88 formed by the first inclined side S1) Except that it was the same as Example 2. The results are shown in Table 1.

Example 4
As shown in FIG. 1, FIG. 2 and FIG. 6, the air hole 80 has a configuration in which the constriction portion 87 (second constriction portion 89 composed of the second inclined side S2) is formed in the passage 84 (second Except that it was the same as Example 3. The results are shown in Table 1.

[Example 5]
As shown in FIGS. 1, 2 and 7, instead of the L-shaped passage 84, a curved passage 84 (from the first opening 82 toward the second opening 83, the first passage portion 85 and the The second embodiment is the same as the second embodiment except that the two-passage portion 86 continuously has a shape extending in a curvilinear shape, and has a configuration having a communicating portion CP of a curved portion. The results are shown in Table 1.

Comparative Example 1
As shown in FIGS. 1, 2 and 11, the second opening 83 of the air hole 80 is disposed at the upper end 21 of the handle 20 and communicated with the outside of the packaging bag 100 (handle 20). The same as in Example 1 except for the above. The results are shown in Table 1.

Comparative Example 2
As shown in FIG. 1, FIG. 2 and FIG. 12, it was the same as Comparative Example 1 except that the air hole 80 was configured to have a straight passage 84. The results are shown in Table 1.

Comparative Example 3
Comparative Example 2 except that the air hole 80 is configured to have the constriction part 87 (constriction part 87 formed by the inclined side S) in the straight passage 84 as shown in FIGS. 1, 2 and 13. It was the same as. The results are shown in Table 1.

  From Table 1, the first opening 82 of the air hole 80 is disposed at the lower end 22 of the handle 20 so as to communicate with the inside of the bag body 10 of the packaging bag 100, and the second opening 83 is the packaging bag 100 (hand 20 In the packaging bag 100 in which the air hole 80 disposed at the other end 24 of the longitudinal direction (X direction in FIGS. 1 to 5) of the handle 20 is formed in the handle 20 to communicate with the outside of The evaluation of the air release test was also good (O), and the evaluation of the air return test was also good (O) (Examples 1 to 5).

  On the other hand, a packaging bag in which the air hole 80 disposed in the upper end 21 of the handle 20 is formed in the handle 20 so that the second opening 83 communicates with the outside of the packaging bag 100 (handle 20). At 100, the evaluation of the air release test was ○ (good) in all cases, but the evaluation of the air return test was × (poor) (Comparative Examples 1 to 3).

  From these results, the first opening 82 is disposed at the lower end 22 of the handle 20 so as to communicate with the inside of the bag body 10 of the packaging bag 100, and the second opening 83 is outside the packaging bag 100 (hand 20). The packaging bag 100 formed in the handle 20 has an air hole 80 disposed at the other end 24 of the handle 20 in the longitudinal direction (X direction in FIGS. 1 to 5) so as to communicate with the It turned out that it can suppress.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments and examples described above, and various modifications may be made within the scope of the invention described in the claims. Changes are possible.

100 Packaging bag T Packaged material (toilet paper)
DESCRIPTION OF SYMBOLS 10 bag main body 11 upper part 12 base 20 holding hand 21 upper end 22 lower end 23 one end 24 other end 50 sealing part 60 sealing part 70 air hole 71 sealing part 72 1st opening part 73 2nd opening part 80 air hole 81 sealing part 82 1st Opening 83 Second opening OW1 Opening width OW2 Opening width 84 Passage 84A End 84 B End 85 First passage portion 86 Second passage portion 87 Narrowed portion 88 First narrowed portion 89 Second narrowed portion S Inclined side S1 First Inclined side S2 Second inclined side H Heat seal TW1 Width of tip of first narrowed portion TW2 Width of tip of second narrowed portion

Claims (8)

A packaging bag having a main body portion for housing a package, a handle portion provided on an upper portion of the main body portion, and an air hole provided on the inner side of the handle portion,
The air holes are
A first opening disposed at the lower end in the height direction of the handle and communicating with the main body;
A second opening disposed at an end in a longitudinal direction orthogonal to the height direction of the handle and communicating with the outside of the packaging bag;
A packaging bag, wherein the air hole communicates with the first opening and the second opening.   The packaging bag according to claim 1, wherein the opening width of the first opening is larger than the opening width of the second opening. The air hole has a passage having a width larger than the opening width of the first opening and a width smaller than the opening width of the second opening,
The first opening communicates with one end of the passage,
The packaging bag according to claim 1, wherein the second opening communicates with the other end of the passage.   The packaging bag according to claim 3, wherein the passage is tapered from the first opening side toward the second opening side. The passage has at least one constriction,
The packaging bag according to claim 3, wherein the narrowed portion is tapered from the first opening side toward the second opening side.   The packaging bag according to claim 5, wherein the narrowed portion is adjacent to the first opening.   The packaging bag according to claim 5 or 6, wherein the constriction portion is constituted by an inclined side which inclines to the inside of the passage.   The packaging bag according to any one of claims 1 to 7, wherein the air hole is formed by heat sealing.

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