JP6224500B2 - Packaging bag - Google Patents

Description

  The present invention relates to a packaging bag provided with a mouthpiece.

  In recent years, instead of bottle containers such as plastic bottles and glass bottles, packaging bags in which resin sheets are formed in a bag shape have been used as containers. Packaging bags formed from resin sheets can save resources compared to bottle containers such as plastic bottles and glass bottles, and can be folded down after use, contributing to volume reduction of garbage.

  As the packaging bag, for example, a packaging bag disclosed in Patent Document 1 is known. The packaging bag of Patent Document 1 is composed of a bottom sheet and a pair of side sheets, and is bonded to each edge of the bottom sheet and the side sheets in a state where the folded bottom sheet is sandwiched between the pair of side sheets. By doing so, it is formed in a bag shape. A mouthpiece is provided between the pair of side sheets at the top of the packaging bag, and the contents can be taken out from the mouthpiece.

JP2013-121844A

  By the way, since the said packaging bag is formed from the resin sheet, it has the property that rigidity is low and can be changed easily. The packaging bag having such a property has an advantage that an empty packaging bag can be folded into a small size at the time of disposal, but as the contents are taken out, it becomes difficult to point the mouthpiece directly above. There is also a problem that it tends to tilt.

  The present invention has been made in view of such conventional circumstances, and an object of the present invention is to provide a packaging bag in which the upright posture of the mouthpiece is more suitably maintained without being influenced by the remaining amount of the contents. There is.

In order to achieve the above object, the packaging bag according to claim 1, wherein a bag body formed by bonding a sheet material with a mouthpiece between the sheet material and both side portions of the bag body are close to each other. And a cover for accommodating the bag body, wherein the mouthpiece of the bag body forms a sheet bonding portion to which the sheet material is bonded, and both sides of the bag body. parts are in the front view, is bent so that seemed I its top Do heavy on the sheet bonding portion of the port member, the upper portion of the cover, each side of the bag body and the sheet bonding portion of the port member parts and, characterized in that houses a portion Ru visible What Do heavy in the front view. In this configuration, the upper portion of the cover that is accommodated so as to bend the bag body also accommodates the sheet bonding portion of the mouthpiece, so that the upright posture of the mouthpiece is more suitably maintained.

  In the packaging bag, it is preferable that the mouth piece forms a flange, and an upper edge of the cover is in contact with the flange. In this configuration, the upper portion of the cover accommodates the sheet bonding portion of the mouthpiece, and the end edge thereof is in contact with the flange, so that the holding state of the mouthpiece in an upright posture is stabilized.

  In the packaging bag, the bag body and the cover are such that the lower edge of the bag body and the lower edge of the cover are in the same vertical position, or the lower edge of the cover is below the lower edge of the bag body It is preferable to arrange so as to extend. In this configuration, when the packaging bag is erected on the placement surface, a load related to maintaining the upright posture of the mouthpiece acts on the placement surface via the cover. Therefore, the holding state of the upright posture of the mouthpiece is stabilized.

  According to the packaging bag of the present invention, the upright posture of the mouthpiece is more suitably held without being affected by the remaining amount of the contents.

(A) is a perspective view of a packaging bag, (b) is an upper front view of the packaging bag, and (c) is a bottom view of the packaging bag. The disassembled perspective view of a bag main body. The perspective view of the bag main body before accommodating in a cover. The perspective view which shows one Embodiment of a cover. The perspective view which shows the cover of the example of a change. The perspective view which shows the cover of the example of a change. The front view which shows the state in which the bag main body of the example of a change was accommodated in the cover. The bottom view of the packaging bag which shows the example of a change of the state in which the bag main body was accommodated in the cover.

Hereinafter, the packaging bag of this invention is demonstrated based on drawing.
As shown in FIG. 2, the packaging bag includes a bag body 10 formed in a bag shape by a resin sheet as a sheet material. The resin sheet constituting the bag body 10 is a known resin sheet generally used for packaging bags (for example, polyethylene, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, polyamide, polyester, etc.). Single layer or multilayer resin sheet). In this embodiment, the resin sheet which has the heat welding layer which consists of heat welding resin only in the surface of one side is used as a sheet | seat material.

  As shown in FIG. 2, the bag body 10 is disposed so as to face each other so as to sandwich the bottom sheet 11 having a horizontally long rectangular shape that is folded in two vertically so that the folded side A faces upward. And a pair of side sheets 12. The bottom sheet 11 is folded in half so that the surface having the heat-welded layer is positioned on the outer surface side (facing the outside). Semicircular cutouts 11a are provided on both sides of the bottom sheet 11 folded in half.

  As shown in FIG. 2, the pair of side sheets 12 are both formed in a long rectangular shape, and are arranged to face each other so that the surfaces on the side having the heat welding layer face each other. A bottom sheet 11 is disposed along the lower edge of the side sheet 12. The lengths of the bottom sheet 11 and the side sheet 12 in the left-right direction (fold side direction) are equal.

  As shown in FIG. 3, a lower adhesive portion 13 formed by heat-welding the side sheet 12 and the bottom sheet 11 to a lower portion of the bag body 10, that is, a portion where the bottom sheet 11 is disposed between the side sheets 12. Is provided. The lower adhesive portion 13 is an area surrounded by a curved line B that is recessed in an arc shape in the vertical direction and each edge (left edge, right edge, and lower edge) of the side sheet 12, and the inner surface and the bottom surface of the side sheet 12. The outer surface of the sheet 11 is bonded.

  As shown in FIG. 3, side adhesive portions 14 formed by heat-sealing the side sheets 12 with a predetermined width are provided on both sides of the bag body 10 along the left and right side edges of the side sheets 12. Yes. The side part adhesion part 14 adhere | attaches the inner surfaces of the side sheet 12 in the part in which the bottom sheet 11 is not pinched | interposed between the side sheets 12. FIG. And in the part by which the bottom sheet 11 is pinched | interposed between the side sheets 12, the inner surface of the side sheet 12 and the outer surface of the bottom sheet 11 are adhere | attached. In addition, in the notch part 11a of the bottom face sheet | seat 11, the inner surfaces of the side sheet | seat 12 are adhere | attached.

  As shown in FIG. 3, an upper adhesive portion 15 is provided on the upper portion of the bag body 10, along the upper edge of the side sheet 12, by thermally welding the inner surfaces of the side sheets with a predetermined width. A mouthpiece 20 serving as an outlet is attached to the central portion of the upper adhesive portion 15 and is integrally attached. The mouthpiece 20 is formed of a cylindrical pouring part 21 that forms a flow path therein, the upper end side and the lower end side being both open, and a cap 22 that closes the opening on the upper end side of the pouring part 21. .

  As shown in FIG. 3, the extraction portion 21 is provided with a mounting portion 23 for protruding the mouthpiece 20 on top of the pair of side sheets 12 at a lower position on the outer peripheral surface thereof. The mounting portion 23 is formed of a substantially rhombic plate-like flange 24 projecting laterally from the pouring portion 21, and a sheet bonding portion 25 suspended from the lower surface of the flange 24 along the periphery of the flange 24. The inside is hollow. In the hollow attachment portion 23, a reinforcing portion is provided that extends from the distal end of the attachment portion 23 to the outer peripheral surface of the extraction portion 21. The mouthpiece 20 is disposed so that the sheet bonding portion 25 is sandwiched between the side sheets 12, and the outer peripheral surface of the sheet bonding portion 25 and the inner surface of the side sheet 12 are thermally welded in the upper bonding portion 15. It is attached. In addition, as shown in FIG. 2, a male screw 26 as an engagement portion with the cap 22 is provided at an upper position on the outer peripheral surface of the extraction portion 21.

  As shown in FIG. 4, the cover 30 is a cylindrical body having a substantially trapezoidal shape in side view, and is formed of a resin sheet as a sheet material. The cover 30 is made of a resin sheet that is harder than the resin sheet of the bag body 10 and has a fan shape, and adhesive margins 35 having a predetermined width are formed on both side edges along the side edges. The cover 30 has a cylindrical shape by folding the resin sheet in two and bonding the inner surface of one bonding margin 35 and the outer surface of the other bonding margin 35 by heat welding or the like. Therefore, the other bonding margin 35 is arranged along the inside of the cover 30. The cover 30 has an upper opening 32 formed in the upper part 31 and a lower opening 34 formed in the lower part 33, and the cross-sectional area is formed so as to become smaller toward the upper opening 32 side. The bonding of the bonding allowance 35 can be performed by a known bonding method, whether by ultrasonic welding or bonding by an adhesive.

  As shown in FIGS. 1A to 1C, the cover 30 accommodates the bag body 10 such that both sides of the bag body 10 approach each other along the side bonding portion 14. The bag body 10 accommodated in the cover 30 is bent in a substantially C-shape when viewed from above, with both side portions thereof bent toward the same side sheet 12 side of the pair of side sheets 12. The upper portion 31 of the cover 30 is disposed so as to accommodate the sheet bonding portion 25 of the mouthpiece 20 while bending and holding both side portions of the side sheet 12 of the bag body 10. Further, the upper portion 31 of the cover 30 is arranged so that the upper edge 36 as an end edge thereof is in contact with the lower surface of the flange 24 of the mouthpiece 20. The upper opening 32 of the cover 30 is set in consideration of the outer peripheral length of the sheet bonding portion 25 of the mouthpiece 20 and the thickness of the side sheet 12 of the bag body 10. The lower edge 37 of the cover 30 is formed to extend downward from the lower edges of the bottom sheet 11 and the side sheet 12 of the bag body 10 that is bent and held by the lower part 33 of the cover 30. Therefore, the lower edge 37 of the cover 30 comes into contact with the placement surface when the packaging bag is placed on the placement surface. Further, the inner peripheral length of the lower opening 34 of the cover 30 is set in consideration of the size of the bottom sheet 11.

Next, the operation and effect of this embodiment will be described.
(1) When the bag main body 10 is inserted from the lower opening 34 of the cover 30, the side of the bag main body 10 is bent so as to have a rounded shape when viewed from above, and is accommodated in the cover 30. When the upper end side of the mouthpiece 20 comes out of the upper opening 32 of the cover 30, the upper portion 31 of the cover 30 is disposed so as to accommodate the sheet bonding portion 25 of the mouthpiece 20. At this time, the restoring force of the both side portions of the side sheet 12 to return from the bent state to the original state acts on the inner surface of the upper portion 31 of the cover 30. Therefore, the position of the mouthpiece 20 is fixed by the upper portion 31 of the cover 30 both in the front-rear direction and in the left-right direction of the bag body 10, and even if the remaining amount of the contents of the bag body 10 decreases, the mouthpiece 20 stands upright. The posture is more suitably maintained.

  (2) The flange 24 is formed in the pouring portion 21 of the mouthpiece 20, and when the cover 30 accommodates the bag body 10, the upper edge 36 of the upper portion 31 abuts the lower surface of the flange 24. Since the flange 24 of the mouthpiece 20 is supported by the upper edge 36 of the cover 30, the holding state of the upright posture of the mouthpiece 20 can be stabilized.

  (3) The lower edge 37 of the cover 30 is disposed so as to extend below the lower edges of the bottom sheet 11 and the side sheet 12 of the bag body 10. When the packaging bag is erected on the placement surface, a load related to maintaining the upright posture of the mouthpiece 20 acts on the placement surface via the cover 30. Therefore, the holding state of the upright posture of the mouthpiece 20 can be stabilized.

  (4) Since both side portions of the side sheet 12 are bent toward the same side sheet 12 of the pair of side sheets 12, the mouthpiece 20 tends to tilt toward the same side sheet 12. If it says in FIG.1 (c), it will tend to incline to the upper side of drawing. However, since the cover 30 accommodates the bag body 10 and the upright posture of the mouthpiece 20 is more suitably held, the tilt of the mouthpiece 20 is suppressed.

  (5) The upper opening 32 of the cover 30 has an inner peripheral length set to a predetermined length considering the outer peripheral length of the sheet bonding portion 25 of the mouthpiece 20. Accordingly, the sheet bonding portion 25 of the mouthpiece 20 including both side portions of the side sheet 12 that is bent is appropriately tightened, and the cover 30 contributes to maintaining the upright posture of the mouthpiece 20.

  In addition, this embodiment can also be changed and embodied as follows. Moreover, it is also possible to change the said embodiment like the structure of the combination of the following modification example mutually.

  For example, the configuration of the cover 30 may be changed. As shown in FIG. 5, a cylindrical cover 30 may be configured by forming bonding margins 35 on both side edges of a pair of sheet materials and bonding the facing surfaces of these bonding margins 35. Further, as shown in FIG. 6, the inner surfaces of the bonding allowances 35 formed on both side edges may be bonded to each other, and the bonding allowances 35 bonded to each other may protrude to the outside of the cover 30. For example, in the case of the cover 30 shown in FIG. 5, it is possible to reinforce the cover 30 in the vertical direction by injection-molding a reinforcing material extending along the side edge while surrounding the side edge.

  -The overall shape of the bag body 10 is not particularly limited. For example, as shown in FIG. 7, the upper edge of the side sheet 12 may be configured to include an inclined edge, and the mouthpiece 20 may be bonded along the inclined edge. The upper adhesive portion 15 of the bag body 10 is configured to include an inclined portion corresponding to the inclined edge. In this case, the upright state of the mouthpiece 20 means a state in which the mouthpiece 20 is oriented in a direction orthogonal to the inclined edge. The shape of the cover 30 may be changed in accordance with the bag body 10, and the upper opening 32 of the cover 30 is formed along the inclined edge of the upper edge of the side sheet 12. Even in the bag body 10 having such a configuration, when the bag body 10 is accommodated in the cover 30, both side portions of the side sheet 12 are bent and rounded in a top view. 7, the sheet bonding portion 25 of the mouthpiece 20 is accommodated in the upper portion 31 of the cover 30, and the inclined edge included in the upper edge 36 of the cover 30 is in contact with the lower surface of the flange 24 of the mouthpiece 20. Yes. The upper edge 36 of the cover 30 means not only the uppermost edge of the cover 30 but also the edge corresponding to the edge of the upper portion 31 of the cover 30.

  For example, the bottom sheet 11 may be omitted and the bag body 10 may be configured with a pair of side sheets 12. Even in such a configuration of the bag body 10, if the bag body 10 is bent and accommodated in the cover 30 so as to have a rounded shape when viewed from above, self-sustainability can be ensured by cooperation with the cover 30.

  -For example, you may change the bending width of the side part of the side sheet 12. FIG. As shown in FIG. 7, the bending width of one side portion of the side sheet 12 may be increased and the bending width of the other side portion may be decreased. Alternatively, the bag body 10 may be accommodated in the cover 30 without bending only one side and bending the other side.

  For example, it is possible to change the bending mode of the side sheet 12. As shown in FIG. 8, of the pair of side sheets 12, the side part of one side sheet 12 is bent on the side of one side sheet 12, and the side of the other side sheet 12 is placed on the side of the other side sheet 12. You may make it make the both sides of the side sheet 12 approach so that a part may be bent. In this case, a rounded shape is formed so as to form an S shape in a top view.

  -About the bending of the bag main body 10 accommodated in the cover 30, the range in the up-down direction is not specifically limited. For example, the lower portion of the bag body 10 accommodated in the lower portion 33 of the cover 30 can be accommodated so as not to be bent.

  -For example, the configuration of the mouthpiece 20 can be changed to one having a check valve mechanism as disclosed in JP2013-252900A. In particular, in the case of such a mouthpiece 20 with a check valve mechanism, the side sheets 12 may approach each other as the remaining amount of contents decreases, and the self-supporting property of the bag body 10 may be lost. However, when the bag body 10 is accommodated in the cover 30 while being bent, the self-supporting property can be more suitably secured.

  -For example, the structure of the attachment part 23 of the mouthpiece 20 is not particularly limited. It is also possible to form the flange 24 in a disc shape or a square plate shape, and the peripheral surface of the sheet bonding portion 25 may be an annular shape or a square shape.

  For example, the cover 30 is arranged so that the bottom edge 11 of the bag body 10 and the bottom edge of the side sheet 12 that are bent and held by the lower edge 37 of the cover 30 are in the same vertical position. May be. In this case, when the packaging bag is set up on the placement surface, the lower edge 37 of the cover 30 and the lower edges of the bottom sheet 11 and the side sheet 12 of the bag body 10 come into contact with the placement surface. Alternatively, the bottom edge of the bottom sheet 11 and the side sheet 12 of the bag body 10 may be formed so as to extend downward from the bottom edge 37 of the cover 30. In this case, when the packaging bag is erected on the placement surface, the bottom sheet 11 and the lower edge of the side sheet 12 of the bag body 10 come into contact with the placement surface, and the lower edge 37 of the cover 30 is separated from the placement surface. It will be.

  For example, the inner peripheral surface of the upper portion 31 of the cover 30 may abut on the peripheral surface of the flange 24 of the mouthpiece 20. Even in this case, the holding state of the upright posture of the mouthpiece 20 is stabilized.

  For example, the upper edge 36 of the cover 30 may be disposed so as to be separated from the flange 24 of the mouthpiece 20. Even in this case, if the upper portion 31 of the cover 30 is configured to accommodate the sheet bonding portion 25 of the mouthpiece 20, the upright posture of the mouthpiece 20 is more suitably held. In particular, it is preferable that the upper part 31 of the cover 30 accommodates all of the sheet bonding part 25 in the vertical direction. However, if at least a part of the sheet bonding part 25 in the vertical direction is accommodated in the upper part 31 of the cover 30, The 20 upright posture is more suitably maintained.

  For example, before the bag body 10 is accommodated in the cover 30, the bag body 10 can be configured so that the bent state is maintained such that both side portions of the side sheet 12 are bent toward each other. is there. The side adhesive portions 14 on both sides are bonded to each other, or the side adhesive portions 14 are bent and bonded to be accommodated in the cover 30 in a state where the bending of the bag body 10 is held. Also good.

  In the above embodiment, a resin sheet is used as the sheet material constituting the bag body 10, but a sheet material other than the resin sheet, for example, a sheet material obtained by laminating aluminum foil or paper may be used. This also applies to the cover 30.

The technical idea that can be grasped from the above embodiment and other examples will be described.
(B) A bag body formed by adhering a sheet material with a mouthpiece interposed between the sheet materials, bent and accommodated so that both sides thereof approach each other, and a cover formed in a cylindrical shape And the upper part of the said cover accommodates the said sheet | seat adhesion part to which the said sheet | seat material is adhere | attached of the said mouthpiece.

  (B) The upper edge of the cover is a cover that comes into contact with a flange formed on the mouthpiece when the bag body is accommodated.

  DESCRIPTION OF SYMBOLS 10 ... Bag main body, 12 ... Side sheet as sheet material, 20 ... Mouth, 24 ... Flange, 25 ... Sheet adhesion part, 30 ... Cover, 31 ... Upper part, 36 ... Upper edge as an edge, 37 ... Lower edge .

Claims (3)

A packaging bag comprising: a bag body in which a sheet material is bonded with a mouthpiece interposed between the sheet materials; and a cover for accommodating the bag body by bending the both sides of the bag body so as to approach each other Because
The mouthpiece of the bag body forms a sheet bonding portion to which the sheet material is bonded,
Both side portions of the bag body, in a front view, the upper portion is bent so that seemed I Do heavy to the sheet bonding portion of the opening device,
The top of the cover, and the side portions of the bag body and the sheet bonding portion of the port member is a packaging bag which houses a portion of Ru visible What Do heavy in the front view.   The packaging bag according to claim 1, wherein the mouth piece forms a flange, and an upper edge of the cover is in contact with the flange.   In the bag body and the cover, the lower edge of the bag body and the lower edge of the cover are in the same vertical position, or the lower edge of the cover extends below the lower edge of the bag body. The packaging bag of Claim 1 or Claim 2 arrange | positioned.