JPH11198948A - Packaging bag with opening maintenance sheet - Google Patents

Abstract

(57) [Summary] [Problem] A flat spout has good accumulation efficiency during distribution and storage, there is no trouble in transporting the packaging bag on the content filling machine, and the spout at the spout is used during use. Provided is a packaging bag with an opening maintaining sheet which can form a three-dimensional structure in which an outlet hole can be easily poured out with one touch. A flexible packaging bag (100) having a spout (110) having a spout opening (112) with a cut end to open a spout (112) at the time of use. A square opening maintaining sheet 200 in which a fold line 201 in the pouring direction is formed at a substantially central position in a direction perpendicular to the pouring direction in the outlet hole, and the lower surface of either the left side or the right side of the fold line One of the inner surfaces of the synthetic resin film is bonded and inserted, and the locking sheet 300 is bonded and protruded from the inner surface of the synthetic resin film on the side corresponding to the opening maintaining sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag for refilling liquid detergents, toiletries, fruit juice drinks, seasonings and the like, and more particularly, to a packaging bag with an opening maintaining sheet for easily discharging contents. is there.

[0002]

2. Description of the Related Art In recent years, refill containers for various liquid contents have been widely used from the standpoint of environmental protection and resource saving. As a container for this refill, there is a flexible bag with a spout made of a synthetic resin film used by cutting the spout and opening the spout hole at the time of use. In order to improve the ease of dispensing, for example, a spout hole of a spout portion described in JP-A-8-2538 is formed into a hollow cylindrical shape or a hollow semi-cylindrical shape. It is known that a semi-rigid or hard pipe is buried in a spout hole of a spout port described in JP-A-24956.

[0003]

However, in the above-mentioned conventional packaging bag with a spout, before the contents are filled, the packaging bag body is flat but the spout has a three-dimensional structure. Therefore, the accumulation efficiency during distribution and storage is poor, and when filling the contents, troubles in transporting the packaging bags in the filling machine are likely to occur, which may require a special transport device or the like. Was.

The present invention has been made to solve the above-mentioned problem of the conventional packaging bag with a spout, and has a flat spout and a good accumulation efficiency during distribution and storage. It is an object of the present invention to provide a packaging bag with an opening maintaining sheet which has no trouble in transporting the bag and which can be formed into a three-dimensional structure in which the pouring hole of the pouring port can be easily poured out with one touch at the time of use.

[0005]

That is, the first aspect of the present invention is as follows.
As shown in FIGS. 1 (a) and 1 (b), the invention has a spout portion (110) that cuts the tip at the time of use to open a spout hole (112), and the peripheral edge of the front and back synthetic resin films. In a flexible packaging bag (100) having a sealed part, a fold line (201) in the pouring direction is formed in the pouring hole of the pouring port at a substantially central position in a direction perpendicular to the pouring direction. The opening maintaining sheet (200) having a shape is inserted by attaching the lower surface of one of the left and right sides of the fold line to the inner surface of one of the front and back synthetic resin films, and A packaging bag (10) with an opening maintaining sheet, characterized in that a locking sheet (300) is adhered to and protruded from the inner surface of the synthetic resin film on the side corresponding to (1).

Next, a second invention of the present invention is shown in FIG.
As shown in (b) and (b), a flexible package having a spout (110) that cuts the tip at the time of use to open a spout hole (112) and seals the peripheral edges of the front and back synthetic resin films. In the bag (100), at the pouring hole of the pouring port,
A square opening maintaining sheet (200) formed with a fold line (201) in the pouring direction substantially at the center in a direction perpendicular to the pouring direction is placed on the lower surface on either the left or right side of the fold line. An engaging groove or an engaging protrusion (113) was formed on the inner surface of the synthetic resin film on the side corresponding to the opening maintaining sheet by bonding to and inserting into one of the inner surfaces of the synthetic resin film on the front and back. It is a packaging bag (10) with an opening maintenance sheet characterized by the above-mentioned.

Next, a third invention of the present invention is shown in FIG.
As shown in (b) and (b), a flexible package having a spout (110) that cuts the tip at the time of use to open a spout hole (112) and seals the peripheral edges of the front and back synthetic resin films. In the bag (100), the fold line (20
1a) is formed at a substantially central position in a direction perpendicular to the pouring direction, and one or more locking projections (210) are formed on the upper surface on either the left or right side of the fold line in parallel with the pouring direction. Then, a square-shaped opening maintaining sheet (200) forming a fold line (201b) in the pouring direction at a substantially central position in a direction perpendicular to the pouring direction on the other side is placed inside the former fold line (201a). And the lower surface between the fold line and the latter fold line (201b) was adhered to one of the inner surfaces of the synthetic resin film on the front and back sides and inserted into the spout hole of the spout portion. It is a packaging bag (10) with an opening maintenance sheet characterized by the above-mentioned.

Next, a fourth invention of the present invention is shown in FIG.
As shown in (b) and (b), a flexible package having a spout (110) that cuts the tip at the time of use to open a spout hole (112) and seals the peripheral edges of the front and back synthetic resin films. In the bag (100), the fold line (20
1) is formed at a substantially central position in a direction perpendicular to the pouring direction, and upwards from a cut (202c) in the pouring direction and two cuts (202a, 202b) in a direction perpendicular to the pouring direction. A square-shaped opening maintaining sheet (200) that forms the warped bent plate (220) from substantially the center position in the direction perpendicular to the pouring direction to one edge portion is formed on the upper surface on the side where the bent plate is not formed. A packaging bag (10) with an opening maintenance sheet, wherein the packaging bag (10) is adhered to one of the inner surfaces of the front and back synthetic resin films and inserted into the pouring hole of the pouring port.

Next, a fifth invention of the present invention will be described with reference to FIG.
As shown in (b) and (b), a flexible package having a spout (110) that cuts the tip at the time of use to open a spout hole (112) and seals the peripheral edges of the front and back synthetic resin films. In the bag (100), two cuts (202) in the pouring direction are formed substantially parallel to each other at a substantially central portion, and a direction perpendicular to the pouring direction extending from the upper end and the lower end of each of the two cuts to the edge. Are formed to form locking plates (230 a, 230 b) corresponding to the left and right, and each of the locking plates has a triangular wave-shaped locking strip (231) in the pouring direction.
a, 231b) are formed in parallel with each other, and eight fold lines (201) in the pouring direction are formed from both ends to the ends of the four cuts perpendicular to the pouring direction. The lower surface of the adhesive plate (240) formed from the four fold lines and the two cuts at substantially the center in the direction perpendicular to the pouring direction is attached to the lower surface of the sticking plate (240). A packaging bag (10) with an opening maintaining sheet, wherein the packaging bag (10) is adhered to one of the inner surfaces of the synthetic resin film of (1) and inserted into the pouring hole of the pouring port.

Next, a sixth invention of the present invention will be described with reference to FIG.
As shown in (b) and (b), a flexible package having a spout (110) that cuts the tip at the time of use to open a spout hole (112) and seals the peripheral edges of the front and back synthetic resin films. In the bag (100), a square notch (250) is formed at the center position, and a fold line (201) in the pouring direction extending from the center and both ends of the upper and lower sides of the notch is formed. A square opening maintaining sheet (200) to be inserted is inserted into the spout hole of the spout section by sealing the both sides of the opening maintaining sheet between the peripheral edges of the front and back synthetic resin films. A packaging bag (10) provided with an opening maintaining sheet, which is worn.

FIG. 7 shows a seventh embodiment of the present invention.
As shown in (a) and (b), it has a spout portion (110) that cuts the tip at the time of use to open a spout hole (112), and seals the peripheral edges of the front and back synthetic resin films. In the flexible packaging bag (100), two cuts (202) parallel to the direction perpendicular to the pouring direction are provided substantially at the center position.
a, 202b) and a cutout (202c) in the pouring direction that connects one end of the two parallel cuts with each other, a support plate (260) is provided, and the two parallel support plates are provided. A square opening maintaining sheet (200) forming fold lines (201a and 201b) extending from the other end of the cut to the upper end and the lower end, respectively, is obtained by mounting the upper surface excluding the support plate on the side where the support plate is formed. Characterized in that it is adhered to one of the inner surfaces of the synthetic resin film and inserted into the spout hole of the spout portion.
0).

[0012]

In the packaging bag with the opening maintaining sheet according to the present invention, since the spout port and the packaging bag body are flat until the content is filled, the efficiency of accumulation during distribution and storage is high, and the content filling machine is used. There is no trouble in transporting the packaging bag, and no special device for transport is required.

Further, in the packaging bag with the opening maintaining sheet of the present invention, the opening maintaining sheet made of a rigid synthetic resin sheet and provided with a fold line so as to be foldable is inserted into the spout hole of the spout. Therefore, at the time of use, the tip of the spout is cut off to open the container, and the opening maintaining sheet inserted into the spout is bent by the fold line provided, so that a three-dimensional structure can be easily formed from a flat state. It can be changed to, The opening maintenance sheet of this three-dimensional structure, in order to maintain the pouring hole formed of the outer flexible synthetic resin film in the open state,
When the contents are transferred to another container, the contents can be easily poured out.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1 (a), for example, as shown in FIG. 1 (a), a packaging bag (10) with an opening maintaining sheet according to the present invention has a tip cut off to open a pouring hole (112). An outlet (112) of a flexible packaging bag (100) having an outlet (110) and sealing the peripheral edges of the synthetic resin film on the front and back, and having a bendable, flat and moderate rigidity. When the contents are poured out, the opening maintaining sheet (200) is inserted as shown in FIG.
0) is bent to form a three-dimensional structure.

The above-mentioned packaging bag with an outlet is usually composed of a stretched polyester film layer / polyethylene layer structure, a stretched polyester film layer / unstretched polypropylene film layer structure, a nylon film layer / polyethylene layer structure,
Nylon film layer / unstretched polypropylene film layer structure, nylon film layer / aluminum foil layer / polyethylene layer structure, nylon film layer / aluminum foil layer / unstretched polypropylene film layer structure, stretched polyester film layer / stretched nylon film layer / polyethylene layer Structure, stretched polyester film layer / stretched nylon film layer / unstretched polypropylene film layer structure, stretched polyester film layer / aluminum foil layer / nylon film layer / polyethylene layer structure, stretched polyester film layer / aluminum foil layer / nylon film layer /
Non-stretched polypropylene film layer structure, nylon film layer / tearable stretched polypropylene film layer / aluminum foil layer / polyethylene layer structure, nylon film layer /
Laminating laminated films such as tearable stretched polypropylene film layer / aluminum foil layer / unstretched polypropylene film layer structure, tearable nylon film layer / polyethylene layer structure, tearable nylon film layer / unstretched polypropylene film layer structure, As shown in FIG. 1 (a), a sealing portion (101) is provided on the peripheral portion by a heat sealing method such as a heat sealing method. Depending on the purpose of use, a single-layer film may be used. In addition, a notch (111) for opening is usually formed in the spout, and the form of the packaging bag may be a well-known flat pouch which is not self-supporting, but is provided with a bottom member at the bottom to provide a self-standing standing pouch. It may be a pouch.

Further, the opening maintaining sheet is made of polyethylene,
Single layer sheet such as polypropylene or polyethylene layer /
Polystyrene layer / polyethylene layer structure, unstretched polypropylene film layer / polystyrene layer / unstretched polypropylene film layer structure, polyethylene layer / stretched polyester film layer / polyethylene layer structure, unstretched polypropylene film layer / stretched polyester film layer / unstretched polypropylene film It is made using a laminated sheet with a layered structure or a single-layered sheet such as a polyethylene-polypropylene blended resin, polyethylene-polystyrene blended resin, or polypropylene-polystyrene blended resin. It is formed by:

As shown in FIGS. 1 (a) and 1 (b), for example, as shown in FIGS. 1 (a) and 1 (b), a packaging bag (10) with an opening maintaining sheet according to an embodiment of the present invention has a pouring hole (112). Next, a square opening maintaining sheet (200) in which a fold line (201) in the pouring direction is formed at a substantially central position in a direction perpendicular to the pouring direction is formed, and a lower surface on the left side of the fold line forms a spout portion. The inner surface of the synthetic resin film on the back side is bonded and inserted using a heat fusion method or an adhesive, and the locking sheet (300) is bonded to the inner surface of the synthetic resin film on the front surface by the heat fusion method or an adhesive. And projecting by bonding. Then, when the content is to be poured, the tip of the spout is cut to open a pouring hole, and as shown in FIG. 1C, the fold line (201) of the opening maintaining sheet (200) is cut. Pressing the outer side of the packaging bag (100) with a finger to bend it inward, and hooking the bent side end of the opening maintaining sheet to the locking sheet (300) projecting to the right side of the inner surface of the upper synthetic resin film, The flat opening maintaining sheet has a three-dimensional structure with one touch, and the outlet of the outlet of the packaging bag is maintained in an open state to secure the flow path (114) for the contents.

Next, as shown in FIGS. 2 (a) and 2 (b), for example, as shown in FIGS. 2 (a) and 2 (b), a packaging bag (10) with an opening maintaining sheet according to another embodiment of the present invention is provided. Outlet (1
12), a square opening maintaining sheet (200) having a fold line (201) in the pouring direction substantially at the center in a direction perpendicular to the pouring direction, and a lower surface on the left side of the fold line serving as a spout portion. The synthetic resin film on the back side to be formed is bonded to the inner surface of the synthetic resin film by using a heat fusion method or an adhesive, and a locking groove (113) is formed on the inner surface of the synthetic resin film on the front side. . Then, when the content is to be poured, the tip of the spout is cut to open a pouring hole, and as shown in FIG. 2C, the fold line (20) of the opening maintaining sheet (200) is cut.
1) is pressed inward from the outside of the packaging bag (100) with a finger and bent inward, and the leading end of the folded side of the opening maintaining sheet is formed on the right side of the inner surface of the upper synthetic resin film.
When hooked to 13), the flat opening maintaining sheet has a three-dimensional structure with one touch, and the outlet of the outlet of the packaging bag is maintained in an open state to secure the flow path (114) for the contents.

Next, as shown in FIGS. 3 (a) and 3 (b), for example, as shown in FIGS. 3 (a) and 3 (b), a packaging bag (10) with an opening maintaining sheet according to another embodiment of the present invention has a fold line (201a). )
Is formed at a substantially central position in a direction perpendicular to the pouring direction, and four locking projections (210) are formed on the upper surface on the right side of the fold line in parallel with the pouring direction. A fold line (201b) in the pouring direction is provided at a substantially central position in a direction perpendicular to the direction.
Is formed by bending the fold line (201a) inward on the square opening maintenance sheet (200) forming the fold line (2).
01a) and the fold line (201b) are adhered to the inner surface of the synthetic resin film on the back side using a heat fusion method or an adhesive and inserted into the pouring hole (212) of the pouring port (110). Is what you wear. Then, when the contents are to be poured out, the tip of the pouring opening is cut to open the pouring hole, and as shown in FIG.
01b) is pressed with a finger from the outside of the packaging bag (100) and folded inward, and the tip of the folded side of the opening maintaining sheet is
When hooked on the locking projection (210) formed on the right side of the inner surface of the synthetic resin film above, the flat opening maintenance sheet becomes a three-dimensional structure with one touch, and the spouting hole of the spout of the packaging bag is opened. The content flow path (11
4) is secured.

Next, as shown in FIGS. 4 (a) and 4 (b), for example, as shown in FIGS. 4 (a) and 4 (b), a packaging bag (10) with an opening maintaining sheet according to another embodiment of the present invention has a fold line (201). ) Is formed at a substantially central position in a direction perpendicular to the pouring direction, and is upwardly opposed to a cut (202c) in the pouring direction and two cuts (202a, 202b) in a direction perpendicular to the pouring direction. A rectangular opening maintaining sheet (200), which forms a bent plate (220) extending from a substantially central position in a direction perpendicular to the pouring direction to an edge on the right side, is folded along a fold line (20).
The upper surface on the left side of 1) is adhered to the inner surface of the synthetic resin film on the front side using a heat fusion method or an adhesive, and the spout port (11)
0) is inserted into the pouring hole (112). Then, when the content is to be poured, the tip of the spout is cut to open a pouring hole, and as shown in FIG. 4 (c), the fold line (201b) of the opening maintaining sheet (200) is cut. Packaging bag (1
00), when the sheet is pressed inward from the outside and bent inward, the bent side end of the opening maintaining sheet and the end of the bent plate abut against the inner surface of the synthetic resin film forming the spout hole, and the flattening opening maintaining sheet Has a three-dimensional structure with one touch, and the spouting hole at the spout of the packaging bag is maintained in an open state, so that the flow path (114) for the contents is secured.

Next, as shown in FIGS. 5 (a) and 5 (b), for example, a packaging bag (10) with an opening maintaining sheet according to another embodiment of the present invention has a pouring direction substantially at the center. Two cuts (202) are formed in parallel with each other, and four cuts are formed at right angles to the pouring direction extending from the upper end and the lower end of each of the two cuts to the edge, respectively, so that the left and right locks are formed. Plates (230a, 230b) are formed, and each of the locking plates has a triangular wave-shaped locking streak (231a, 23b).
1b) are formed in parallel with each other (four and three in the figure), and eight folds in the pouring direction extending from both ends to the ends of four cuts perpendicular to the pouring direction. Line (20
Square-shaped opening maintaining sheet (200) forming 1)
Is adhered to the inner surface of the synthetic resin film on the back side by bonding the lower surface of an adhesive plate (240) formed of four fold lines and two cuts substantially at the center in the direction perpendicular to the pouring direction. It is inserted into the discharge hole (112) of the part (110). And when pouring out the contents, the tip of the pouring outlet is cut to open a pouring hole, and as shown in FIG.
The fold line (201) on both sides of the sticking plate (240) of the opening maintaining sheet (200) is pressed by a finger from the outside of the packaging bag (100) to be bent inward, and the ascending plate (230a) ascending
When the upper surface of the locking ridge portion (231b) of the locking plate (230b) is fitted to the lower surface of the locking ridge portion (231a), the flat opening maintaining sheet becomes a three-dimensional structure with one touch, and the packaging bag is filled. The outlet (outlet) is maintained in an open state, and the flow path (114) for the contents is secured.

Next, a packaging bag (10) with an opening maintaining sheet according to another embodiment of the present invention has a square notch at the center as shown in FIGS. (250), and a square opening maintaining sheet (2) forming a fold line (201) in the pouring direction extending from the center of the upper side and the lower side to both ends of the cutout.
00), the edges on both sides of the opening maintaining sheet are sandwiched between the peripheral edges of the front and back synthetic resin films, sealed, and inserted into the spout hole of the spout port. And when pouring out the contents, the tip of the spout is cut off to open a pouring hole, and as shown in FIG. 6 (c), a finger is pressed from the outside of the packaging bag (100), Front part of opening maintenance sheet (200X)
The three fold lines (201) are bent upward and bent upward, and at the same time, the three fold lines (201) in the rear part (200Y) are bent downward and bent downward. The flat opening maintaining sheet has a three-dimensional structure with one touch, and the outlet of the outlet of the packaging bag is maintained in an open state to secure the flow path (114) for the contents.

Next, as shown in FIGS. 7 (a) and 7 (b), for example, the packaging bag (10) with an opening maintaining sheet according to another embodiment of the present invention is almost at the center position and the pouring direction is set. Two cuts parallel to the right angle direction (202a, 202b)
And a cutout (202c) in the pouring direction that connects one end of the two parallel cuts with the support plate (260).
And a fold line (201) extending from the other end of the two parallel cuts of the support plate to the upper end and the lower end, respectively.
a and 201b) are adhered to the inner surface of one of the front and back synthetic resin films on the upper surface excluding the support plate on the side where the support plate is formed, and the spout opening portion is formed. It is inserted into the pouring hole. And
When the contents are to be poured, the tip of the pouring port is cut to open a pouring hole, and as shown in FIG.
Pressing the finger from the outside of 0) with an opening maintaining sheet (200)
When the folding line (201) is pressed inward from the outside of the packaging bag (100) with a finger and bent inward, the end on the bent side of the opening maintaining sheet and the end of the support plate (260) form an ejection hole. The opening maintenance sheet, which was in contact with the inner surface of the resin film and was flat, became a three-dimensional structure with one touch.
The outflow hole of the outflow port (110) of (00) is maintained open, and the flow path (114) of the contents is secured.

The above-described packaging bag with an opening maintaining sheet of the present embodiment was compared and evaluated with a conventional packaging bag with a spout in which a pipe was buried in a spout hole of the spout. The packing bag with the opening maintaining sheet has good accumulation efficiency at the time of distribution and storage, and has a good filling efficiency without occurrence of trouble relating to transport of the packing bag on the contents filling machine. Further, the state of the contents being discharged from the discharge hole was comparable to that of the conventional one.

[0025]

The packaging bag with the opening maintaining sheet of the present invention has a flat spout as well as the packaging bag main body, so that the efficiency of accumulation during distribution and storage is good, and even a normal contents filling machine can be used. No trouble in transporting packaging bags.

In the packaging bag with an opening maintaining sheet according to the present invention, the tip of the spout opening is cut off at the time of use and opened, and the opening maintaining sheet inserted into the pouring hole is provided with a crease line. Can be changed to a three-dimensional structure with one touch.The three-dimensional structure of the opening maintenance sheet keeps the pouring hole open, so when transferring the contents to another container, the contents are poured out. Easy to pour through holes.

[Brief description of the drawings]

FIG. 1A is an explanatory view showing a structure of a spout portion of a packaging bag with an opening maintaining sheet according to an embodiment of the present invention;
(B) is a cross-sectional view along the line AA ', and (c) is a cross-sectional view showing a state inside the spout when the contents are poured out.

FIG. 2A is an explanatory view showing a structure of a spout portion of a packaging bag with an opening maintaining sheet according to another embodiment of the present invention;
(B) is a cross-sectional view taken along the line BB ', and (c) is a cross-sectional view showing a state inside the spout when the contents are poured out.

FIG. 3 (a) is an explanatory view showing a structure of a spout portion of a packaging bag with an opening maintaining sheet according to another embodiment of the present invention,
(B) is a cross-sectional view taken along the line CC ′, and (c) is a cross-sectional view showing a state inside the spout when the contents are poured out.

FIG. 4A is an explanatory view showing a structure of a spout portion of a packaging bag with an opening maintaining sheet according to another embodiment of the present invention;
(B) is a cross-sectional view taken along the line DD ′, and (c) is a cross-sectional view showing a state inside the spout when the contents are poured out.

FIG. 5A is an explanatory view showing a structure of a spout portion of a packaging bag with an opening maintaining sheet according to another embodiment of the present invention;
(B) is a cross-sectional view along the line EE ', and (c) is a cross-sectional view showing a state inside the spout when the contents are poured out.

FIG. 6A is an explanatory view showing a structure of a spout portion of a packaging bag with an opening maintaining sheet according to another embodiment of the present invention;
(B) is a cross-sectional view taken along the line FF ', and (c) is a cross-sectional view showing a state inside the spout when the contents are poured out.

FIG. 7A is an explanatory view showing a structure of a spout portion of a packaging bag with an opening maintaining sheet according to another embodiment of the present invention;
(B) is a sectional view taken along the line GG ', and (c) is a sectional view showing a state inside the spout when the contents are poured out.

[Explanation of symbols]

 Reference Signs List 10: packaging bag with opening maintaining sheet 100: packaging bag 101: seal portion 110: spout portion 111: notch 112: pouring hole 113: locking groove or locking protrusion 114: flow path 200: Opening maintenance sheet 201: Crease line 202: Cut line 203: Adhesion 210: Locking projection 220: Bending plate 230: Locking plate 231: Locking strip 240: Sticking plate 250 ... Notch 260... Supporting plate 300... Locking sheet X... Front part Y.

Claims (7)

[Claims] 1. A flexible packaging bag having a spout opening for opening a spout hole by cutting a tip thereof at the time of use, and sealing a peripheral edge of a synthetic resin film on the front and back, wherein the spouting of the spout is performed. In the hole, a square opening maintaining sheet formed with a fold line in the pouring direction at a substantially central position in a direction perpendicular to the pouring direction, and the lower surface of either the left side or the right side of the fold line is combined with the front and back sides. An opening characterized in that a locking sheet is bonded to and protruded from the inner surface of the synthetic resin film on the side corresponding to the opening maintaining sheet, while being bonded and inserted to one of the inner surfaces of the resin film. Packaging bag with maintenance sheet. 2. A flexible packaging bag having a spout for cutting a tip thereof to open a spout hole at the time of use and sealing a peripheral portion of a synthetic resin film on both sides thereof. In the hole, a square opening maintaining sheet formed with a fold line in the pouring direction at a substantially central position in a direction perpendicular to the pouring direction, and the lower surface of either the left side or the right side of the fold line is combined with the front and back sides. An opening having a locking groove or a locking projection formed on the inner surface of the synthetic resin film on the side corresponding to the opening maintaining sheet, by being bonded and inserted to one of the inner surfaces of the resin film; Packaging bag with maintenance sheet. 3. A flexible packaging bag having a spout opening for opening a spout hole by cutting a tip at the time of use, and sealing a peripheral portion of a synthetic resin film on the front and back, wherein a fold line in the pouring direction is formed. Formed almost at the center of the direction perpendicular to the pouring direction,
One or more locking projections are formed on the upper surface of either the left or right side of the fold line in parallel with the pouring direction, and the pouring direction is substantially at the center of the other side at right angles to the pouring direction. A square opening maintaining sheet that forms a fold line, the former fold line is bent inward, and the lower surface between the fold line and the latter fold line is one of the front and back synthetic resin films. A packaging bag with an opening maintenance sheet, wherein the packaging bag is adhered to an inner surface and inserted into the spout hole of the spout portion. 4. A flexible packaging bag having a spout opening for opening a spout hole by cutting a tip at the time of use, and sealing a peripheral edge of a synthetic resin film on the front and back, wherein a fold line in the pouring direction is formed. Formed almost at the center of the direction perpendicular to the pouring direction,
In addition, an upwardly bent plate, which is formed by a cut in the pouring direction and two cuts perpendicular to the pouring direction, is formed from a substantially central position in a direction perpendicular to the pouring direction to an edge on one side. A square-shaped opening maintaining sheet, wherein the upper surface on the side where the bent plate is not formed is bonded to one of the inner surfaces of the front and back synthetic resin films and inserted into the spout hole of the spout portion. Packaging bag with opening maintenance sheet. 5. A flexible packaging bag having a spout opening for opening a spout hole by cutting a tip at the time of use and sealing a peripheral edge of a synthetic resin film on the front and back, and a pouring direction substantially at the center. Are formed in parallel with each other, and four cuts are formed in the direction perpendicular to the pouring direction extending from the upper end and the lower end of each of the two cuts to the respective edge portions to form locking plates corresponding to the right and left. One or more triangular wavy locking strips in the pouring direction are formed side by side on each of the locking plates, and from both ends of four cuts perpendicular to the pouring direction. A square-shaped opening maintaining sheet forming eight fold lines in the pouring direction over the end portion is formed from the four fold lines and two cuts at substantially the center in the direction perpendicular to the pouring direction. Place the lower surface of the adhesive plate on either of the front and back synthetic resin films. Opening maintain the packaging bag with a sheet adhered to a surface, characterized in that it has inserted into the note Deana of the spout. 6. A flexible packaging bag having a spout opening for opening a spout hole by cutting a tip at the time of use, and sealing a peripheral edge of a synthetic resin film on the front and back sides, wherein a square cut is formed at a center position. Forming a notch, and forming a square opening maintaining sheet forming a fold line in a pouring direction extending from the center and both ends of the upper side and lower side of the notch to an end portion on both sides of the opening maintaining sheet; Characterized by being sandwiched between the peripheral edges of the synthetic resin films on the front and back sides, sealed, and inserted into the spout hole of the spout port. 7. A flexible packaging bag having a spout opening for opening a spouting hole by cutting the tip at the time of use, and sealing the peripheral edges of the synthetic resin film on the front and back, substantially at the center position.
A support plate is provided by forming a cut in the pouring direction connecting between two cuts parallel to the direction perpendicular to the pouring direction and one end of the two parallel cuts, and a support plate is provided. A square opening maintaining sheet forming a fold line extending from the other end of the two cuts to the upper end and the lower end,
An opening maintaining sheet, characterized in that the upper surface excluding the support plate on which the support plate is formed is adhered to one of the inner surfaces of the front and back synthetic resin films and inserted into the discharge hole of the discharge port. With packaging bag.