JP6885628B2 - Packaging bag - Google Patents

Description

The present invention relates to a packaging bag made of a sheet material.

In recent years, instead of bottle containers such as plastic bottles and glass bottles, packaging bags in which a resin sheet is formed in a bag shape have been used. A packaging bag made of a resin sheet can save resources as compared with a bottle container such as a plastic bottle or a glass bottle, and can be folded into a small size after use, which also contributes to a reduction in the volume of waste.

As the packaging bag, for example, the 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 heats each side edge of the bottom sheet and the side sheets in a state where the bottom sheet folded in half is sandwiched between the pair of side sheets. It is formed in a bag shape by welding. Further, in the packaging bag of Patent Document 1, columnar reinforcing members are attached to both side edge portions for the purpose of preventing center folds and improving independence.

Japanese Unexamined Patent Publication No. 2003-19964

By the way, since the packaging bag is made of a resin sheet, it has a property of low rigidity and easy deformation. The above-mentioned packaging bag having such properties has an advantage that an empty packaging bag can be folded into a small size at the time of disposal, but the packaging bag is easily crushed when the packaging bag is gripped to take out the contents. There is also a problem that the stability of the gripped state is lowered.

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 having improved stability when gripped.

The packaging bag for solving the above problems includes a bag-shaped bag body made of a sheet material, a columnar reinforcing member for reinforcing the side edge of the bag body, and a mouthpiece having a cap attached to the bag body. , A packaging bag including a packaging material for covering the mouthpiece, wherein the packaging material is a tubular film made of a heat-shrinkable resin, and the bag main body has side edges close to each other. The bag body and the reinforcing member are fixed to the bent shape by being in close contact with the packaging material together with the mouthpiece, and the bag body and the reinforcing member are fixed to the bent shape. A locking portion on the mouthpiece side for locking is provided.

The mouthpiece side locking portion is preferably provided on the cap.

According to the packaging bag of the present invention, stability when gripped is improved.

Front view of the packaging bag in a bent shape. Enlarged view of the part covered with the packaging material in the packaging bag. An exploded perspective view of the bag body. A perspective view of the bag body in a non-bent shape. (A) and (b) are side views of the mouthpiece. (A) and (b) are explanatory views regarding the attachment of the packaging material. Explanatory drawing of a packaging bag in a used state in which the packaging material is broken. (A) and (b) are explanatory views of a modified example of a packaging bag.

Hereinafter, an embodiment of the present invention will be described.
As shown in FIGS. 1 and 3, the packaging bag includes a bag body 10 formed in a bag shape by a resin sheet, and a mouthpiece 20 attached to an upper edge portion of the bag body 10.

As shown in FIG. 3, the bag body 10 has a horizontally long substantially rectangular bottom sheet 11 folded in half so that the folds face upward, and a pair of vertically long bottom sheets 11 arranged so as to sandwich the bottom sheet 11. It is composed of a rectangular side sheet 12 of the above. Then, in a state where the pair of side sheet 12s are overlapped with the lower portion (mounting portion 23) of the mouthpiece 20 and the entire bottom sheet 11 folded in half, the upper and lower and left and right edge portions of the side sheet 12 are respectively. It is adhered and formed in the shape of a bag having a mouthpiece 20 on the upper side.

Specifically, as shown in FIG. 4, at the upper edge of the bag body 10, the outer peripheral surface of the lower portion (mounting portion 23) of the mouthpiece 20 and the inner surface of the side sheet 12 are adhered to each other, and the side sheet 12 The inner surfaces of the above are adhered to each other with a certain width. At the left and right side edges of the bag body 10, the inner surfaces of the side sheet 12 are adhered to each other with a constant width. In the lower edge of the bag body 10, the inner surface of the side sheet 12 and the outer surface of the bottom sheet 11 are surrounded by an arc-shaped concave curve in the vertical direction and the left edge, right edge, and lower edge of the side sheet 12. It is glued in the area.

The contents are housed in the bag body 10. The contents contained in the bag body 10 are not particularly limited. Examples of the contents contained in the bag body 10 include fluid contents such as liquid, particle, and jelly.

As shown in FIGS. 5A and 5B, the mouthpiece 20 is a mouthpiece with a cap having a cap 21. The mouthpiece 20 includes a cylindrical tubular portion 22 that opens up and down. A mounting portion 23 is provided at the lower portion of the tubular portion 22 so as to project in the radial direction and the upper edge of the bag body 10 is adhered and fixed. A male screw 22a with which the cap 21 is engaged is provided on the outer periphery of the upper portion of the tubular portion 22. A female screw that engages with a male screw is provided on the inner circumference of the cap 21 (not shown).

Further, a flange 24 for supporting the lower end of the cap 21 is provided on the outer periphery of the central portion of the tubular portion 22. A groove-shaped recess 25 recessed in the radial direction is provided in the portion of the tubular portion 22 between the flange 24 and the mounting portion 23.

As shown in FIGS. 3 and 4, a pair of reinforcing members 30 are attached to both side edge portions of the bag body 10. The reinforcing member 30 is a columnar member having a U-shaped cross section (groove shape) that covers the adhesive portion of the edge portion of the bag body 10 from the outside. Further, the reinforcing member 30 includes a side edge reinforcing portion 31 that reinforces the entire side edge of the bag body 10, and an upper edge reinforcing portion 32 that reinforces the end of the upper edge of the bag body 10, and has an L shape as a whole. Is formed in. Then, both reinforcing members 30 are integrally fixed to the adhesive portion of the upper edge and the side edge of the bag body 10. A non-reinforcing portion 13 to which the reinforcing member 30 is not attached is provided at the central portion of the upper edge of the bag body 10.

As shown in FIGS. 1 and 2, the bag body 10 configured as described above has a bent shape in which both side edge portions are bent so as to be close to each other, that is, a shape that is rolled into a substantially C shape in a top view. It is said that. Specifically, a state in which the upper portions of both side edge portions of the bag body 10 are bent toward one side surface sheet 12 that constitutes the bag body 10, and the reinforcing members 30 attached to the both side edge portions are brought close to each other. It is said that. The upper edge of the bag body 10 is bent at the non-reinforcing portion 13. Then, a packaging material 40 that covers each of these parts is attached to the upper portion of the bag body 10 and the mouthpiece 20 that have the bent shape.

As shown in FIGS. 6A and 6B, a tubular film made of a heat-shrinkable resin (so-called tube-type shrink film) is used as the packaging material 40. The heat-shrinkable resin constituting the packaging material 40 is not particularly limited, and may be any heat-shrinkable resin that can be used for packaging an object by heat-shrinking.

The packaging material 40 before attachment has a tubular shape having an inner diameter sufficient to accommodate the upper portion of the bent bag body 10. The packaging material 40 is provided with a fracture guiding portion 41 composed of a plurality of perforated holes. The fracture guiding portion 41 is provided in parallel with the transverse fracture guiding portion 41a that goes around in the circumferential direction in the central portion of the packaging material 40 at a predetermined interval, and is one edge (upper edge) from the transverse fracture guiding portion 41a. ), It is composed of a pair of vertical fracture guiding portions 41b.

As shown in FIG. 6B, the packaging material 40 is heat-shrinked by heating while accommodating the entire mouthpiece 20 and the upper portion of the bag body 10 having a bent shape inside the packaging material 40. It is attached so as to cover the mouthpiece 20, the upper part of the bag body 10, and the upper part of the reinforcing member 30 in close contact with each other.

As shown in FIG. 2, the packaging material 40 has, with respect to the mouthpiece 20, the upper peripheral peripheral surface and the outer peripheral surface of the cap 21, the outer peripheral surface of the flange 24, and the recess 25 along the uneven shape of each of these portions. Cover in close contact. With respect to the upper part of the bag body 10 and the upper part of the reinforcing member 30, the side sheet 12 located on the outer side when the reinforcing member 30 is bent, and the portion located on the outer side when the reinforcing member 30 is bent. Cover in close contact along the uneven shape of each part. In particular, the packaging material 40 is in close contact with the concave portion 25 of the mouthpiece 20 and the stepped portion between the bag body 10 and the reinforcing member 30 along the uneven shape of each of these portions.

The bag body 10 is fixed in a bent shape by being covered with a tubular packaging material 40 not only on the mouthpiece 20 but also on the upper part of the bag body 10. From the viewpoint of more stably fixing the bag body 10 in a bent shape, the length L of the portion of the packaging material 40 that covers the bag body 10 is preferably set to 10 mm or more, and more preferably 12 mm or more. preferable. Further, in the state where the packaging material 40 is attached, the lateral fracture guiding portion 41a is located at or near the boundary between the cap 21 and the flange 24.

Next, the operation of this embodiment will be described.
In the packaging bag of the present embodiment, the bag body 10 is fixed in a curved shape that is rounded in a top view by being covered with the packaging material 40. In the bent-shaped packaging bag, the number of side sheets 12 overlapping in the thickness direction increases, and the rigidity of the bag body 10 in the thickness direction is increased. As a result, it is possible to prevent the bag body 10 from being easily crushed when the packaging bag is gripped, and the bag body 10 can be stably gripped while feeling a certain reaction force.

Further, as compared with the packaging bag in which the bag body 10 has a non-bent shape, the package bag in which the bag body 10 has a bent shape and is rolled is easier to fit in the palm and easier to hold. The ease of holding the packaging bag also improves the stability when the packaging bag is gripped. Furthermore, the rounded shape also improves the independence of the packaging bag. Further, the packaging bag in which the bag body 10 has a bent shape has an external shape (substantially conical or substantially cylindrical) like a bottle when viewed from the side, and is excellent in design.

As shown in FIGS. 2 and 7, when the contents are taken out from the packaging bag, the packaging material 40 is fractured along the fracture guiding portion 41. As a result, the upper part of the packaging material 40, that is, the portion of the packaging material 40 that covers the cap 21 of the mouthpiece 20 is separated and removed, and the cap 21 can be removed from the mouthpiece 20. Then, by removing the cap 21, the contents contained in the bag body 10 can be taken out through the tubular portion 22 of the mouthpiece 20.

At this time, even after a part of the packaging material 40 is removed so that the cap 21 can be removed and the contents can be taken out, the upper portion of the bag body 10 and the upper portion of the reinforcing member 30 in the packaging material 40 are covered. The part to be used remains as it is. Therefore, even after the contents can be taken out from the packaging bag, the bent shape of the bag body 10 is maintained by the remaining packaging material 40.

Next, the effect of this embodiment will be described.
(1) The packaging bag is a bag-shaped bag body 10 made of a resin sheet, a columnar reinforcing member 30 for reinforcing the side edge of the bag body 10, and a mouthpiece having a cap 21 attached to the bag body 10. 20 and a packaging material 40 for covering the mouthpiece 20 are provided. The packaging material 40 is a tubular film made of heat-shrinkable resin, and the bag body 10 has a bent shape in which the side edges thereof are bent so as to approach each other, and the bag body 10 and the reinforcing member 30 form a mouthpiece. Together with 20, it is fixed in a bent shape by being closely covered with the packaging material 40.

According to the above configuration, the stability when gripping the packaging bag is improved. Further, since the mouthpiece 20 is fixed in the bent shape by using the packaging material 40 that covers and protects the mouthpiece 20, it is not necessary to newly provide a configuration for fixing the mouthpiece 20 in the bent shape.

(2) The packaging material 40 is provided with a breakage guiding portion 41 for removing the portion covering the cap 21 of the mouthpiece 20 while leaving the portion covering the bag body 10 and the reinforcing member 30.
According to the above configuration, the cap 21 is in a state where the portion covering the cap 21 of the mouthpiece 20 is removed while leaving the portion covering the bag body 10 and the reinforcing member 30, that is, the bent shape of the bag body 10 is maintained. It becomes easy to break the packaging material 40 so that the packaging material 40 can be removed.

(3) The mouthpiece 20 includes a mounting portion 23 to which the packaging bag is fixed, and a recess 25 is provided between the cap 21 and the mounting portion 23 of the mouthpiece 20. The packaging material 40 covers the mouthpiece 20 in close contact with the recess 25.

According to the above configuration, when a force for moving the packaging material 40 in the pulling direction acts on the packaging material 40, the packaging material 40 is locked by being caught in the recess 25. As a result, it is possible to prevent the packaging material 40 from being displaced. As a result, the bent shape of the bag body 10 can be stably maintained. In the present embodiment, the recess 25 functions as a mouthpiece side locking portion.

(4) The reinforcing member 30 includes an upper edge reinforcing portion 32 that reinforces the end portion of the upper edge of the bag body 10. The packaging material 40 covers the mouthpiece 20 in a state of being in close contact with the upper edge reinforcing portion 32.
According to the above configuration, a step is formed between the reinforcing member 30 (upper edge reinforcing portion 32) and the bag body 10 in the axial direction of the packaging material 40 (see FIG. 2). Therefore, when a force for moving the packaging material 40 in the pulling direction acts on the packaging material 40, the packaging material 40 is locked by being caught in the step. As a result, it is possible to prevent the packaging material 40 from being displaced. As a result, the bent shape of the bag body 10 can be stably maintained. In the present embodiment, the upper edge reinforcing portion 32 functions as a reinforcing member side locking portion for locking the packaging material 40.

(5) The reinforcing member 30 includes a side edge reinforcing portion 31 that reinforces the side edge of the bag body 10. The packaging material 40 covers the mouthpiece 20 in a state of being in close contact with the side edge reinforcing portion 31.
According to the above configuration, a step is formed between the reinforcing member 30 (side edge reinforcing portion 31) and the bag body 10 in the circumferential direction of the packaging material 40 (see FIG. 2). Therefore, when a force that moves the packaging material 40 in the direction of rotation acts on the packaging material 40, the packaging material 40 is locked by being caught in the step. As a result, it is possible to prevent the packaging material 40 from being displaced. As a result, the bent shape of the bag body 10 can be stably maintained. In the present embodiment, the side edge reinforcing portion 31 functions as a reinforcing member side locking portion for locking the packaging material 40.

The present embodiment can be modified and embodied as follows.
The bent shape of the bag body 10 is not limited to the shape of the above embodiment. For example, the shape may be such that each side edge portion is further bent inward or outward (for example, Ω-shape or S-shape) from a shape that is rounded into a substantially C-shape in top view. Further, at least the upper portion of the bag body 10 may be bent, and only the upper portion may be bent so as to have a substantially conical shape as a whole, or the bag body 10 may have a substantially cylindrical shape as a whole. The bag body 10 may have a bent shape as a whole.

The bag body 10 may be formed in a bag shape by a resin sheet, and the specific structure of each resin sheet constituting the bag body 10 is not particularly limited. For example, the bottom sheet 11 may be omitted and the bag body 10 may be formed only from the pair of side sheets 12.

-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, paper, or the like may be used.

-In the above embodiment, as the cap 21 provided on the mouthpiece 20, a separate cap 21 (so-called screw cap) that engages with a screw structure has been adopted, but the configuration of the cap 21 is limited to this. It's not a thing. For example, an integrated cap 21 that opens and closes with respect to the tubular portion 22 via a hinge may be adopted.

The mouthpiece side locking portion provided on the mouthpiece 20 is not limited to the recess 25, and when the packaging material 40 tries to move relative to the mouthpiece 20, the packaging material 40 is caught and engaged. Any concave-convex structure that can be stopped may be used. The mouthpiece side locking portion may be provided on the cap 21. Further, the locking portion on the mouthpiece side may be omitted.

-For the reinforcing member 30, the upper edge reinforcing portion 32 may be omitted.
-As the reinforcing member side locking portion, when the packaging material 40 tries to move relative to the mouthpiece 20, the uneven structure in which the packaging material 40 is caught and locked is brought into contact with the packaging material 40 in the reinforcing member 30. It may be further provided in the portion to be used.

For example, in the example shown in FIG. 8A, the reinforcing member 30 is provided with a protrusion 33 as a locking portion on the reinforcing member side. Further, in the example shown in FIG. 8B, a step 34 is provided as a locking portion on the reinforcing member side with respect to the reinforcing member 30. According to these configurations, the packaging material 40 is coated in close contact with the protrusions 33 and the steps 34 of the reinforcing member 30. Therefore, when a force for moving the packaging material 40 acts on the packaging material 40, the packaging material 40 is locked by being caught by the protrusion 33 or the step 34.

-The fracture guiding portion 41 provided in the packaging material 40 is not limited to a plurality of holes arranged in a perforated pattern, and may be configured to induce fracture into a specific shape. For example, it may be a thin portion such as a notch. Further, the fracture guiding portion 41 may be omitted. In this case, the user may use a knife or the like to break the packaging material 40 so as to have the shape shown in FIG.

As long as each upper portion of the bent bag body 10 and the reinforcing member 30 is covered with the mouthpiece 20, the range of the bag body 10 and the reinforcing member 30 covered with the packaging material 40 is not particularly limited. .. For example, the bag body 10 and the reinforcing member 30 in a bent shape may be entirely covered with the packaging material 40.

Next, the technical idea that can be grasped from the above-described embodiment and modified example will be described.
(A) The packaging bag in which the mouthpiece-side locking portion is a recess provided between the cap and the mounting portion.

(B) The packaging bag, which is a side edge reinforcing portion that reinforces the end portion of the upper edge of the bag body and a side edge reinforcing portion that reinforces the side edge of the bag body 10.
(C) The packaging bag having a concavo-convex structure provided at a portion of the reinforcing member that comes into contact with the packaging material.

10 ... Bag body, 11 ... Bottom sheet, 12 ... Side sheet, 20 ... Mouthpiece, 21 ... Cap, 22 ... Cylinder part, 23 ... Mounting part, 25 ... Recessed part (Mouthpiece side locking part), 30 ... Reinforcing member , 31 ... Side edge reinforcing portion (reinforcing member side locking portion), 32 ... Upper edge reinforcing portion (reinforcing member side locking portion), 33 ... Protrusion (reinforcing member side locking portion), 34 ... Step (reinforcing member side) Locking part), 40 ... Packaging material, 41 ... Breaking induction part.

Claims (2)

A bag-shaped bag body made of sheet material and
A columnar reinforcing member that reinforces the side edge of the bag body and
A mouthpiece with a cap attached to the bag body and
A packaging bag including a packaging material for covering the mouthpiece.
The packaging material is a tubular film made of a heat-shrinkable resin.
The bag body has a bent shape in which the side edges thereof are bent so as to be close to each other, and the bag body and the reinforcing member are coated together with the mouthpiece in close contact with the packaging material. Fixed in shape,
The mouthpiece is provided with a mouthpiece-side locking portion for locking the packaging material .
A packaging bag characterized in that the upper portion of the bag body is covered with the packaging material and the lower portion of the bag body is not covered with the packaging material. The packaging bag according to claim 1, wherein the mouthpiece-side locking portion is provided on the cap.

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