JP2613842B2 - Packaging bag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag, and more particularly to a packaging bag filled with contents so that a flap or a backing paper sealing an end thereof can be cut off with an opening tape and opened. The present invention relates to a packaging bag with a gusset.

[0002]

2. Description of the Related Art For example, polyethylene bags filled with sugar, salt and the like are packaged in a packaging bag in the form of several or tens of bags, and delivered from a manufacturer to a supermarket or the like. At this time, a packing bag formed of relatively thick kraft paper was used as a packing bag for packing a plurality of small bag groups.

[0003] In a conventional packaging bag, the packaging bag filled with such a small bag group is directly displayed on a place where the consumer can see it, and the small bags such as sugar and salt as contents are freely taken out to a cash register. The wall surface of the packaging bag was configured to be easily and largely opened so that it can be taken out and cleared (Japanese Patent Publication No. 60-15543 and Japanese Utility Model Publication No. 62-36).
772).

[0004] The invention disclosed in Japanese Patent Publication No. 60-15543 is a case of a packaging bag at the end of a step.
The invention disclosed in Japanese Utility Model Publication No. Sho 62-36772 is a case of a packaging bag having straight cut ends. Here, the former packaging bag disclosed in Japanese Patent Publication No. 60-15543 will be briefly described with reference to FIG.

[0005] This packaging bag 1 basically has two opening tapes 2a spaced apart over the entire length in the longitudinal direction inside one wall surface of a gusseted cylindrical body having both ends formed by step cutting.
2b, on the other hand, an opening tape is also adhered to the one end flap 3 of the cylindrical body at a predetermined position over the entire width thereof, and the one end flap 3 of the flat cylindrical body is bent, and the flap is folded. The bottom closure is formed by adhesively closing with an adhesive applied outside the opening tape.

[0006] In this packaging bag, after a polyethylene pouch filled with sugar or salt as contents is aligned and put in from the mouth, the flap of the mouth is bent in the same manner as the bottom closing portion, and the bag is folded. A hot-melt adhesive or a hot-melt adhesive previously applied to the stair surface is applied by a packaging machine, adhered and fixed, and closed.

[0007] To display the packaging bag in a supermarket or the like so that the small bag of the contents can be directly taken out,
Each of the two opening tapes is pulled up from the notch formed in the flap at the closed end, which is an extension of the opening tape attaching wall surface, and the wall surface is torn in the longitudinal direction, forming an open surface of a predetermined area on the entire wall surface. To expose the contents.

[0008] Recently, the following requests have been made by users of supermarkets and the like due to effective use of resources and the like. That is, this type of packaging bag is very strong and it is desirable to reuse it. However, the conventional packaging bag is spaced apart so that consumers can freely take out the inside pouch as shown in FIG. Since the two opening tapes tear the entire wall surface in the longitudinal direction with the two opening tapes, it is hardly reusable.

Another problem is that if the body, that is, the wall surface is cut in the longitudinal direction, it is difficult to organize the used packaging bags because the used packaging bags can be broken. Furthermore, when the number of pouches is actually small, rather than opening the wall surface as described above, open one of the ends of the packaging bag, which is the mouth or bottom, and pull out the pouch in the longitudinal direction. There is also a fact that it is easier to take out the product.

Regarding this opening, for example, in a multilayer kraft paper bag for directly packing resin, fine powder, and the like, a method in which one end can be opened with an opening tape is already known. Therefore, a conventional paper bag that can be opened at the end will be described. Conventionally, as a general end-openable paper bag, both end portions of a cylindrical body formed in a straight line are adhered to opposing wall surfaces with respective backing sheets protruding from the end edge of the cylindrical body. Then, an opening tape extending in the width direction on the outer side from a fold line for bending the end portion at the time of sealing is attached to the backing paper on one end side serving as a bottom portion, and the end portion of the cylindrical body is normally bent twice. Later, it is known that a backing sheet is adhered to an opposing wall surface to form a bottom closed portion.

[0011]

By the way, when an opening method for a paper bag is adopted at the bottom of a conventional packaging bag of this kind, a flap comes out first after opening, which is an obstacle when taking out the contents. become. I tried slitting it to some extent, but it turned out that there was still a problem. The occurrence of such a problem is due to the following reasons. That is, when a group of polyethylene sachets filled with sugar, salt, etc. is put into the packing bag through the mouth at the other end, the packing bag may not be closed due to a problem in the structure of the content filling machine. The flat flap is laid so that the flap on the mouth side is located on the lower side, and aligned in the state at the time of filling. A plurality of small bag groups assembled are moved from the outside in the longitudinal direction of the packaging bag as a whole, and the opening of the packaging bag is opened and the bag is pushed in as it is filled.

Normally, it is determined which wall surface of the packaging bag for filling the small bag group in this state is up. In other words, in the packaging bag, the wall surface on which the flap on the mouth side is not exposed faces upward. Therefore, various printings are made on the wall surface on the assumption that the wall surface is up when the packaging bag is laid down. The vertical positional relationship of such wall surfaces in the packaging bag does not change from the transportation to a supermarket or the like to the loading arrangement at a store after the filling of the above-described small bag group.

The reason is that once the small bag group, which is the contents, is filled in the packaging bag and the mouth is closed, the packaging bag is not turned upside down due to its weight. At present, loading and unloading during transportation is performed while maintaining the positional relationship. However, the fact that the vertical position of the wall surface of the packaging bag is determined in this manner makes it difficult to tear the backing paper by the opening tape at the bottom.

That is, in the case of a packaging bag having a step flap at both ends formed with a closing flap connected to a wall surface, the step faces face in opposite directions to each other. This is generally known because such a packaging bag is formed by continuously cutting a long sheet.

[0015] Therefore, when the packaging bag is laid down so that the flap on the mouth side is on the lower side and the contents are filled and closed according to a conventional method, the end of the already closed bottom closing portion is
Since the flap is on the upper side, it is bent from the upper wall surface 4 to the lower wall surface side as shown in FIG. The packaging bag is transported in this state as described above, and is loaded and displayed in a supermarket or the like.

In order to open the packaging bag, a clerk of a supermarket or the like lifts the opening tape 7 provided on the backing paper 6 at the bottom end 5 and starts tearing the backing paper 6 straight. Then, the upper portion 6a of the torn paper 6 is lifted together with the opening tape 7 as is apparent from FIG. This torn patch 6a
Is located just below the fold, and the upper part 8 of the fold of the wall portion that covers the gusset that is folded in a triangular shape because the end is bent downward. The upper part 8 of the bent portion, which is bonded to the portion 6a, is easily lifted by the opening of the gusset, so that the pulling force is not concentrated on the opening tape, and it is difficult to tear the straight line as well as the straight line. There was found.

Further, when the end of the gusseted tubular body is bent near the edge of the mouth to form a flat bag, and the bag is filled with the contents to form a square, the bent line portion at the end is It will be located at the center on the end face of the squared bag. On the other hand, the unsealing tape is stuck on the backing paper outside the bent line portion.

As a result, when the bent portion is directed downward as shown in FIG. 9 at the end on the opening side, that is, at the bottom closed portion,
The opening tape 7 adhered to the backing paper 6 is located below the center of the end face of the packaging bag that has become square due to the filling of the contents. When the opening tape is located below the center of the end face of the packaging bag in this way, it has been found that since the opening operator stands, it is difficult to find the position of the tape of the packaging bag on the table.

An object of the present invention is to solve such a problem by making it possible to perform straight cutting in addition to the conventional step cutting, in which a closing flap or a backing sheet on the mouth side is positioned below. The present invention provides a packaging bag in which the bottom closing portion or the mouth closing portion can be easily opened with an opening tape even when the contents are filled, closed, and then transported and displayed as it is. It is in.

[0020]

SUMMARY OF THE INVENTION The present invention is a packaging bag.
For example, it is a packaging bag in which a group of small bags made of polyethylene containing sugar, salt, and the like are packed, and the ends are opened with an opening tape. That is, the present invention is, both wall surfaces of the tubular body so that both end surrounding the bent portion after bending once one end of the tubular body with gusset formed by a straight line cut on one wall surface side astride the
1 caul sheet to form a bottom closure portion by closing adhered to both walls, the mouth end of the second caul sheet to the other wall in the mouth
Stack multiple pouches, etc., sticking out from the side edge
A packaging bag to be re-packaged, wherein an opening tape is positioned on one or both of both backing papers provided at both ends of the cylindrical body on a bending side from a bending line of an end of the cylindrical body. And apply the second backing paper when filling the contents.
Lay the packaging bag so that it is positioned below, and fill the contents.
Later, the end of the tubular body of the mouth is the same as the bottom
Bend once to the one wall and bring the second backing paper forward
Glue and close to one of the walls in the same way as the bottom closure
Characterized in that the so that.

Further, the packaging bag of the present invention is a gusseted tubular body having stepped ends formed with a closed flap connected to one wall at one end and connected to the other wall at the other end. One end is cut at any position including or outside the inboard edge, and the cut end is bent in the same direction as the direction in which the closing flap at the other end is bent. A sheet of paper with an opening tape straddling both wall surfaces of the tubular body so as to surround the portion is adhered to both wall surfaces and closed to form a bottom portion, and the opening tape is bent from one end line of the cylindrical body at one end. It is characterized in that it is bonded to the backing sheet so as to be located on the folding side.

[0022]

According to the packaging bag of the present invention, the packaging bag is laid down so that the second backing sheet or the closing flap at the mouth is filled with the small bag group from the mouth, and the contents are stored by the filling machine. After metering, the second backing sheet or closure flap is folded and glued to the wall and closed, or the end is folded and the end of the backing sheet is glued to the wall and closed.

[0023] At that time, a bottom closure in the packaging bag
Just like the mouth closure , the end fold is upward. Since the packaging bag is transported display in this state, mouth
The opening of the bottom closure or bottom closure is done in this state.
That means if you hold down the bottom bend and close it
When that fracture drawn by pulling the tear tape being adhered to the first caul sheet, its tearing beginning, the upper portion of the abutting sheet to be broken is going Mochiagaro with the tear tape.

However, since the end of the wall surface to which the upper portion of the torn sheet is adhered is turned upward, that is, folded back to the wall side, it is lifted together with the upper portion of the torn sheet. Even if it tries to sway, it is prevented from being lifted by the inwardly bent end, so that the lifting of the crushed paper portion is also prevented. It tears as per the opening tape.

The opening tape affixed to the backing sheet at the bottom closing portion of the packaging bag is located above the center of the end face for the above-described reason, so that the opening operator finds the opening tape. Since it is easy and easy to pull up, the efficiency of the opening operation is very good.

[0026]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a packaging bag according to the present invention. FIG. 1 shows a flattened packaging bag 10 according to an embodiment of the present invention. The packaging bag 10 is formed of a single-layer cylindrical body 12 formed of kraft paper of about 150 g / m 2 and having a gusset 11 on both sides. This tubular body 12 is a so-called straight cut end in which both ends are cut linearly.

The gussets 11 formed on both sides of the tubular body 12 are formed into a V-shape by flattening the middle portion of the gusset along the longitudinal direction when flattened. This packaging bag 10
As shown in FIGS. 1 and 2, one end of the cylindrical body 12 is bent toward the one wall surface 12a, and then the cylindrical body 12 is straddled on both wall surfaces 12a and 12b so as to surround the bent portion 13. First
A bottom cover 15 is formed by bonding one backing paper 14 to both wall surfaces.

An opening tape 16 extending in the width direction is adhered to the inside of the backing paper 14 constituting the bottom closing portion 15. As can be seen from FIG. 2, the opening tape 16 is provided at one end of the cylindrical body 12 at the bending side, that is, at the wall surface 1.
It is provided so as to be located on the side 2a. In other words,
The opening tape 16 attached to the backing paper 14 is provided so as to be located on the bending side, that is, on the outer side in the longitudinal direction of the cylindrical body 12 from the bending position (bending line) of the end of the cylindrical body 12. Have been.

On the other hand, when the end of the mouth of the packaging bag 10, that is, the other end of the cylindrical body 12, is folded along the folding line 17 to the same one wall surface 12a as the bottom closing portion 15 after filling the contents, A second backing sheet 18 is attached to the other wall surface 12b of the tubular body 12 so as to protrude from the edge on the mouth side so as to surround and bend the bent portion. In short, as clearly shown in FIG. 2, the packaging bag 10 has a bent side where one end of the tubular body 12 is bent to form the bottom closed portion 15, and a rear end where contents are put in from the mouth. The bending direction is the same as the bending side where the part is bent, and both are bent toward the same wall surface 12a.

The method of using the packaging bag 10 constructed as described above will be described. As shown in FIG. 3, a polyethylene bag filled with sugar, salt, pet food, or the like is filled from its mouth. Patch 18 at the mouth
The packaging bag 10 is laid down so that is located below. Then, after filling the small bag group as the contents by the filling machine, the mouth end is bent along the folding line 17 and then the backing paper 1
After applying an adhesive to 8, the adhesive is adhered to the end face connected to the wall surface 12a and closed.

As a result, the mouth end, which is filled and closed, is completely in the same state as the square bottom closing portion 15 as shown in FIG. In other words, at the bottom closed portion 15 of the packaging bag 10, the end bent portion 13 is directed upward just like the mouth end. As described above, this type of packaging bag 10 is transported and displayed in this state, that is, in the horizontal state in which the wall surface 12a which was located at the time of filling the contents is directly up, so that the bottom closing portion 15 is opened. This is done in this state.

That is, the opening tape 16 adhered to the backing paper 14 which is closed by pressing the bent portion 13 in the bottom closing portion 15 is lifted up by holding one side having cuts on both sides. Tear through. At this time, opening tape 1
When 6 begins to tear the backing sheet 14, the upper backing sheet portion tends to lift with the opening tape 16 attached.

However, as shown in FIGS. 4 and 5, the end of the end face to which the upper patch portion to be torn is bonded is folded upward as shown in FIGS. If the upper part of the paper is pulled upward and tries to lift it, the inwardly bent end prevents the lifting, so that the lifting of the tearing paper is also prevented, and the opening tape 16 is thereby prevented. The lifting force concentrates on the tape and tears in a straight line as per the opening tape.

The opening tape 16 attached to the backing paper 14 of the bottom closing portion 15 of the packaging bag 10
For the reason described above, since the position is higher than the center of the end face (FIGS. 3 to 5), the opening worker
It is very easy to find and pull up, which greatly improves the efficiency of the opening operation.

In the packaging bag 10 according to this embodiment, the opening tape 16 is provided only on the backing paper 14 constituting the bottom closing portion 15, but in the present invention, the backing paper 18 on the mouth side is provided.
Needless to say, an opening tape may be provided in exactly the same manner as the bottom closing portion 15. With this configuration, the bottom and the mouth are not substantially distinguished from each other at the time of opening, and the opening can be performed from any side.

[0036] The packaging bag of the present invention can also be formed from a tubular body having both ends formed in steps. That is, FIG. 6 shows a gusseted tubular body 23 having stepped ends formed with flaps 21 and 22 connected to one wall at one end and connected to the other wall at the other end. ing. As described above, such a cylindrical body 23 whose both ends are cut stepwise is provided with a perforated perforation in a long sheet, which is continuously formed into a tubular shape, and then cut along the perforated line. In order to form a single cylindrical body 23, the step surfaces at each end are formed on opposite sides.

Therefore, in this state, the characteristics of the packaging bag of the present invention described above cannot be provided. Therefore, as shown in FIG. 6, one end of the tubular body 23, that is, the end step surface on the side to be the bottom closed portion is cut along one of the cutting lines 24, 25 or 26. First, a case where one end of the tubular body 23 is cut along the cutting line 24 will be described.

The cutting line 24 passes through a position further inward than the end opening edge 23a of the cylindrical body 23 that is closer to the inside in the longitudinal direction. Therefore, if the end is cut at this position, the end will be the same as the straight cut end shown in FIG. Therefore, on the cut end side, one end of a backing sheet (not shown) with an opening tape is attached to the wall surface to which the closing flap 22 on the mouth side is connected, and the cut end of the tubular body 23 is bent. After that, if the other end of the backing paper is stuck as shown in FIG. 2 so as to surround the bent portion, the configuration of the bottom closing portion formed by this is the packaging bag 10 shown in FIG. 1 and FIG. Has exactly the same configuration as the bottom closing portion 15 of FIG. Therefore, further description is omitted.

Next, a case where one end of the tubular body at the step-cut end is cut along the cutting line 25, in this case, from the end opening edge 23a of the tubular body 23 closer to the inside in the longitudinal direction. However, since the cutting line 25 passes through the outside, the stair surface is slightly left. However, since the step of each edge after cutting is very small as described above, when closing, the end is bent in the direction opposite to the step surface as it is.

That is, the closing flap 22 at the mouth is bent in the same direction as the bending side for bending. Therefore, it is not substantially different from the case of cutting along the cutting line 24. Of course, also in this case, the provision of the backing sheet with the opening tape (not shown) is the same as the above-described example.

Further, a case in which one end of the stepped cylindrical body 23 is cut along the cutting line 26 to form a packaging bag will be described. FIG. 7 shows a state in which one end is cut by a cutting line 26, and FIG.
5 is a plan view of the flat gusseted tubular body 23 at the stepped end of FIG. After one end of the tubular body 23 is cut along the cutting line 26, the remaining portion 21 of the flap at the end on the cut side is placed in the vertical direction (longitudinal direction of the tubular body) at a position within the range of the flat town. The extending notch 27 is inserted into the end opening edge 23a on the inner side.

Then, the cut-side end of the cylindrical body 23 is bent at the bending line 28 along the edge opening edge 23a closer to the inside after the cut portion 27 is formed at the above-described position. . This bending direction is, of course, the same as the bending side of the closure flap 22 at the mouth. After that, as in the above-described embodiment, a backing sheet with an opening tape (not shown) is adhered across both wall surfaces so as to surround the bent portion.

As described above, when the stepped end is bent to the side opposite to the stepped surface to form a packaging bag, the bottom formed in a square shape has a slit-like shape between the triangular regions formed by folding the town on both sides. There is a gap. However, since the contents are a group of small bags filled with sugar, salt, or the like as described above, there is no danger of leakage or the like merely by pressing the bent end portion with the backing paper.

Further, in this embodiment, the cut portion 27 is formed in the remaining portion 21 of the flap at the end on the cutting side for the following reason. Pulling up and tearing off one end of the backing tape to open the bottom closure, the folded end is opened to open the contents for removal.
However, if one end of the tubular body at the end of the staircase is used as the bottom closing part in the above-described procedure, if this is returned to the original state when opened, the upper wall end protrudes from the lower wall end, making it difficult to remove the contents. Become.

For this reason, when the cut portion 27 is formed at the end of the upper wall surface as described above, the bottom portion is closed with only the flap remaining portion 21a between the cut portions 27 being folded at the time of opening as shown in FIG. Since the part is opened, the contents can be easily taken out.

As described above, in the packaging bag of the embodiment described above,
Regardless of whether the end is cut straight or stepped, after filling the small bag group of contents from this mouth with the backing paper or closing flap of the mouth down, this packaging bag is left as it is Not only can the bottom closure be opened when transported and displayed in a store, but it is also very easy to open.

[0047]

As described above, according to the packaging bag of the present invention, even if it is formed of a tubular body having a straight cut end or a tubular body having a step cut end, the backing paper of the mouth can be obtained. Alternatively, after filling the small bag group as the contents from the mouth with the closing flap down, the packaging bag is transported as it is and the bottom closing portion is easily opened even when displayed in a supermarket or the like. Therefore, it is very easy to settle after use, and the packaging bag can be reused.

Further, according to this packaging bag, when opening the bottom closed portion, the opening tape is located at an easy-to-see position, so that it is very easy to confirm the opening tape. It has a great effect such as being straight and very smooth, making it extremely easy to open.

[Brief description of the drawings]

FIG. 1 is a plan view showing a flattened packaging bag according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view schematically showing the packaging bag of the present invention shown in FIG. 1 cut along line 2-2.

FIG. 3 is a perspective view of the packaging bag of the present invention shown in FIG. 1 in a state in which contents are put in from the mouth into a square shape, particularly showing a bottom closing portion.

FIG. 4 is a partial perspective view showing a state in which the bottom closed part of the packaging bag shown in FIG. 3 is opened with an opening tape.

FIG. 5 is a partial cross-sectional view showing the configuration of the packaging bag shown in FIG. 3 by cutting off the bottom closed portion along line 5-5.

FIG. 6 is a plan view showing a tubular body at a stepped end portion of a packaging bag according to another embodiment of the present invention in a flat state.

FIG. 7 is a plan view showing a state in which the packaging bag of the present invention is formed of a tubular body having a step-cut end portion shown in FIG. FIG.

FIG. 8 is a partial perspective view of the packaging bag of one embodiment formed from the tubular body at the stepped end shown in FIG. 4 in a state where the bottom closed portion is opened.

FIG. 9 is a partial perspective view showing a form in which the bottom closure is opened with the small bag group inserted from the mouth in the conventional packaging bag in which the bottom closure can be opened.

FIG. 10 is a perspective view showing a conventional packaging bag whose wall surface can be opened.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Packaging bag 11 Town 12 Cylindrical body 12a One wall surface 12b The other wall surface 13 Bending part 14 Backing paper 15 Bottom closing part 16 Opening tape 17 Folding line 18 Backing paper 22 Closed flap 23 Stair cut end cylindrical body 23a Inner edge 24 Cutting line 25 Cutting line 26 Cutting line 27 Notch 28 Bending line

Claims (2)

(57) [Claims] An end of a gusseted cylindrical body having both ends formed by straight cuts is bent once to one wall surface side, and then straddles both wall surfaces of the cylindrical body so as to surround the bent portion. First
Bottom closure portion by closing by bonding caul sheet to both walls
And a second backing paper on the other wall surface at the mouth end
Multiple pouches, etc., stuck out from the edge
A packaging bag to be re-packaged, wherein an opening tape is placed on one or both of both backing papers provided at both ends of the cylindrical body so as to be located on a bending side of a bending line of an end of the cylindrical body. At the time of filling the contents
The packaging bag so that the second backing paper is positioned below
After filling the contents, remove the end of the cylindrical body at the mouth.
Bend once to the one wall just like the bottom
The second backing paper is connected to one of the
A packaging bag characterized by being adhered to a wall and closed . 2. A gusseted tubular body having stepped ends formed with flaps connected at one end to one wall surface and at the other end to the other wall surface, the edge being directed inward. Or cut at an arbitrary position outside thereof, and the cut end is bent in the same direction as the direction in which the flap at the other end is bent, and then the cylindrical portion is formed so as to surround the bent portion. Adhesive paper with an opening tape straddling both wall surfaces of the body is adhered to both wall surfaces and closed to form a bottom closing portion, and the opening tape is positioned on a bending side of a bending line at one end of the tubular body. A packaging bag which is adhered to the backing paper.