JP2654754B2 - Bags for long products and method for producing bags for long products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag for packaging long items and a method for producing a bag for packaging long items.

[0002]

2. Description of the Related Art Conventionally, when long items such as burdock or onion are stored in a packaging bag, a packaging bag made of a resin film material such as polyethylene is generally used. And about these packaging bags, the one in which the film was injection-molded into a hollow cylindrical shape, and this was blown and fixed at a fixed length position while feeding the film laterally to form a packaging bag with one end opened. It is known.

[0003]

However, when long objects such as burdock are packaged in the packaging bag, the bottom which is melted and closed by the impact at the time of throwing is weak and easily broken. However, it has to be repackaged many times from shipment to store display, which poses a serious problem in practice.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to use a conventional bag-making machine, have excellent bottom strength, and reduce manufacturing costs. It is an object of the present invention to provide a method of manufacturing an inexpensive long bag for packaging.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a front fabric 30 and a back fabric 32 having different widths.
Is superposed in a one-sided manner on one of the edges 34 and 36 to form an input opening 38, and the other edge 40 of one of the wide fabrics of the front fabric 30 and the back fabric 32 is removed. The narrow cloth is folded toward the other edge 42 side, joined 26 to form a folded portion 18, and the front fabric 30 and the back fabric 32 having the folded portion 18 intersect with the folded portion 18. It is composed of a long-sized packaging bag 10 formed by fusing and closing 28 with a certain width in the direction.

Next, according to the present invention, the front fabric 30 and the back fabric 32 having different widths are superposed in a one-sided manner on one of the edges 34, 36 to form a charging opening 38, and the front fabric 30 and the back fabric 30 are formed. In the back cloth 32, the other edge 40 of any wide cloth is turned toward the other edge 42 side of the narrow cloth,
The folded portion 18 is formed by joining 26, and the front fabric 30 and the back fabric 32 on which the folded portion 18 is formed are fused and closed 28 with a certain width in the cross direction with respect to the folded portion 18. It consists of a method of manufacturing a bag for packaging long items.

Further, the front cloth 30 and the back cloth 32 having different widths are roll-wound, respectively, and an end of the roll-wound front cloth 30 and an end of the roll-back cloth 32 are drawn out. A pull-out polymerization step 46 for polymerizing in a side-by-side manner may be included.

[0008]

In the method for manufacturing long packaging bags according to the present invention, one edge of two doughs having different widths is shifted and polymerized, and the other edge of the wider dough is formed. The narrow fabric is folded toward the other edge to form a folded portion, and the front fabric and the back fabric having the folded portion are melted and adhered at a fixed width from the end to form a packaging bag. . Since this packaging bag has a folded portion at the bottom, it is strong and does not break at the time of packaging, and long packaging bags can be manufactured inexpensively using an ordinary bag making machine.

[0009]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1, 2 and 3 show a long-sized packaging bag (hereinafter abbreviated as a packaging bag) according to an embodiment of the present invention.
10 is shown. As is apparent from the figure, the packaging bag 10 has a long bag body 14 having an opening 12 at an end, and the other end of the bag body 14 is provided with a bag body 14 to form a bottom 16. Is provided.

The opening 12 is formed by superimposing the front cloth 30 and the back cloth 32 having different widths on one of the edges 34 and 36 in a one-sided manner to form an input opening 38. Turnback part 18
Is formed by folding the other edge 40 of the wide fabric of the front fabric 30 and the back fabric 32 toward the other edge 42 of the narrow fabric and joining them together. The packaging bag 10 is obtained by fusing and closing 28 the front fabric 30 and the back fabric 32 having the folded portions 18 as described above with a certain width in the cross direction with respect to the folded portions 18.

Thus, when the long bag 20 such as burdock or onion is thrown in from the opening 12 at the end of the bag body 14, the packaging bag 10 has a bottom portion 16 comprising a folded portion 18.
The long products 20 can be stored cleanly for a long time without breaking even if the long products 20 come into contact with the long products.

As shown in FIG. 1 and FIG.
Is made of a synthetic resin film such as a polyethylene film, a polypropylene film, a nylon film, a polystyrene film or the like, and is formed on an elongated surface-side fabric body 22, and disposed on the back side of the surface-side fabric body 22; It has a back side fabric body 24 having the same width as the side fabric body 22 and formed slightly longer.

One end of the back-side fabric body 24 is joined to the upper surface of the front-side fabric body 22 at the end portion after being folded back into a U shape to form the folded portion 18.
Further, both sides of the front-side fabric body 22 and the back-side fabric body 24, and both sides of the folded back-side fabric body 24 are closed and elongated by heat sealing, an adhesive, or the like. It is formed on the bag body 14.

The bag body 14 is preferably about 1 m in length for packing long items 20 such as burdock and onion.
It is formed to have a width of about 8 cm. The length of the bag body 14 is relative to the width direction, and may be any length. That is, it may be 1 m or more or 1 m or less. Also, the width may be set to any length. The bag body 1
When the long items 20 are fed through the opening 12 at one end of the long material 4, even if the end portion of the long items 20 comes into contact with the bottom 16 formed by the folded portion 18 obtained by folding the back side fabric body 24, heat sealing or The folded portion 18 having a greater strength than that of bonding or the like does not break.

Thus, even when long objects such as burdock are thrown into the bag by the folded portion 18 connected to the bag body 14, the bag does not easily break at the bottom portion. Even in the case of handling by the consumer, the storage state thereof can be ensured stably, and the packaging yield and the yield in using the bag itself can be efficiently maintained.

The seals 28, 2
The both sides of the bag body 14 are not in danger of being broken because they only come into contact with the packaged long items 20. In the folded portion 18, the upper surface of the end of the front-side fabric 22 and the rear-side fabric 24 from the gap at the junction 26 with the folded end of the bag body 1
Air flows through the inside of the container 4 and "long-term storage" can be performed without causing "unevenness" in the long articles 20 packaged therein.

The fabric 22 on the front side of the bag body 14
The back side fabric body 24 may be formed of a transparent fabric body as a raw material. In this case, the long things 20 packaged in the bag body 14 can be seen through from the outside and the long things 20 packaged therein.
Quality can be easily checked.

Next, a method for manufacturing the long-length packaging bag according to the present invention as described above will be described. FIG. 4 shows a basic plan explanatory view of the method for producing a long-sized packaging bag of the present invention. As is apparent from the drawing, the present invention is configured such that the front fabric 30 and the back fabric 32 having different widths are superimposed in a one-sided manner on one edge 34, 36 of each of the fabrics, and the input opening 38 is formed. Of the front fabric 30 and the back fabric 32, the other edge 40 of the wide back fabric 32 is turned toward the other edge 42 of the narrow front fabric 30 and joined 26 to form the folded portion 18 Is formed.

That is, one edge of two cloths having different widths is offset and polymerized, and the other edge of the wide cloth is turned toward the other edge of the narrow cloth. Becomes The front fabric 30 and the back fabric 32 forming the folded portion 18 are
Fusing and bonding at a constant width in the cross direction to the folded portion 18
8 to form a packaging bag 10.

The front fabric 30 and the back fabric 32 are, for example,
It is formed using a resin film such as a polyethylene film, a polypropylene film, a nylon film, and a polystyrene film. FIG. 5 is a perspective view showing a folded portion of the packaging bag of the present invention formed by a half-fold portion of a conventional bag making machine. FIG. A perspective view of a state in which the fabric is deflected and guided and turned over is shown.

As shown in FIG. 5, the back fabric 32 and the front fabric 30 are respectively rolled, and the rolled back fabric 32 and the front fabric 30 are half-folded by a normal bag making machine. It is supported by a support (not shown) of a draw-out polymerization section 46 connected to the section 44.

The ends of the rolled back fabric 32 and the front fabric 30 are sandwiched by sandwiching rollers 48 and 48 and a guide roller 50 of the draw-out polymerization process section 46, and the half-folded section 44 is guided. Transported to In the draw-out polymerization section 46, the back cloth 32 is
Are joined and one edge 3 of the front cloth 30 is
4 is positioned so that one edge portion 36 of the backing cloth 32 coincides with the one.

As a result, the front fabric 30 is replaced with the back fabric 32.
Is pulled out while being polymerized in a one-sided manner. The front fabric 30 is bonded to the lower surface of the back fabric 32 and transported.
The surface cloth 30 is guided to be deflected at a half-fold portion 44 described later.
Is inverted to the upper surface of the backing cloth 32.

As shown in FIG. 5, the half-folded portion 44 has a plurality of upper tension rollers 52, and is disposed below the plurality of upper tension rollers 52 at an angle of about 90 degrees with respect to the upper tension rollers 52 in plan view. Nipping roller 5 arranged in the direction
4 and 54, and a triangular plate 56 disposed below the upper tension row 52 for turning the fabric while guiding the fabric.

The apex 58 of the triangular plate 56 is close to the nipping rollers 54, 54, and the opposite side 6
0 is supported downward by a support portion (not shown) so that the reference numeral 0 is parallel to the upper tension roller 52.

The front fabric 30 and the back fabric 32 that have passed through the draw-out polymerization process section 46 circulate from the guide roller 50 toward the upper tension roller 52 of the half-folded section 44,
It is lowered along the back side of the triangular plate 56.

Then, as shown in FIG.
The top fabric 30 and the back fabric 32, which have been superimposed side by side, are deflected and guided to the front side of the triangular plate 56 on the lower surface side of one of the sandwiching sides 62a rising obliquely upward from the apex corner 58 of the triangular plate 56. You.

A substantially middle position of the wide surface L of the back cloth 32 protruding from the other edge 42 of the front cloth 30 is joined to the apex corner 58 of the triangular plate 56 and the other side of the back cloth 32. The edge portion 40 is guided to be deflected from the lower surface side of the other sandwiched side portion 62b of the triangular plate 56 to the front side of the triangular plate 56. Then, the other edge 40 side of the back cloth 32 that has been deflected and guided is folded back and joined to the other edge section 42 side of the front cloth 30, and is pinched and guided by pinching rollers 54, 54 below.

Thus, while the front fabric 30 and the back fabric 32 are superimposed and conveyed in a one-sided manner, the other edge 40 of the back fabric 32 is connected to the other edge of the front fabric 30 by the half-fold portion 44 of the bag making machine. The folded portion 18 is continuously folded back to the portion 42 to form the folded portion 18, and the front fabric 30 and the back fabric 32 are laterally fed by the guide rollers 64 below the sandwiching rollers 54, 54. The packaging bag 10 is formed by fusing and closing 28 as shown in FIG.

Therefore, according to the method for manufacturing a long-length packaging bag according to the present invention, a film cloth having a width twice as long as the long-length packaging bag 10 is formed into a half-folded shape by manual operation by an operator or the like. There is no need to fold, and an existing bag making machine and a resin film having substantially the same width as the length of the long items 20 are used for the front fabric 30 and the back fabric 32, and are used to pack long products while being polymerized in a one-sided manner. The bag 10 can be manufactured at low cost, and the strong bottom portion 16 is formed at the folded portion 18 to prevent the long items 20 from being broken at the time of packaging.

Further, according to such a method for manufacturing a long packaging bag, air is passed through the folded portion 18 of the packaging bag 10 from the joint 26 between the front fabric 30 and the folded back fabric 32 into the bag. It is possible to produce a large number of packaging bags 10 in a short time and at a low cost, which can be stored for a long period of time while preventing the flowing and packaged long items from being "uneven".

[0032]

As described above, according to the long packaging bag of the first aspect, the front opening and the back opening having different widths are superimposed on one edge portion in a one-sided manner, and the charging opening is provided. Part, the front fabric and the back fabric, the other edge of either wide fabric is folded toward the other edge side of the narrow fabric, joined to form a folded portion, The front fabric and the back fabric having the folded portion formed by fusing and closing the folded fabric at a fixed width in the cross direction with respect to the folded portion, so that the bottom becomes strong and the bottom is formed when packing long items. Without breaking
In addition, packaging bags can be manufactured at low cost.

Next, according to the method for manufacturing a long-length packaging bag according to the second aspect, the front cloth and the back cloth having different widths are polymerized in a one-sided manner on one edge to form a charging opening. The other side of the wide cloth out of the front cloth and the back cloth is folded toward the other edge side of the narrow cloth, and joined to form a folded part; The front and back fabrics with the part formed are fused and closed at a fixed width in the cross direction with respect to the folded part, so that the strength is excellent while forming the folded part with a normal bag making machine. The bottom can be formed, and the manufacturing cost can be reduced.

According to a third aspect of the present invention, the front cloth and the back cloth having different widths are respectively roll-wound, and an end of the roll-wound front cloth and an end of the roll-wound back cloth. The front and back fabrics with different widths are easily polymerized in a one-sided shape by including a draw-out polymerization step of polymerizing in a one-sided shape while being pulled out. Can be formed.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of a long packaging bag according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a plan view of a packaging bag in which long items such as “burdock” are packaged.

FIG. 4 is a basic plan explanatory view of a method for manufacturing a long-sized packaging bag.

FIG. 5 is a perspective view showing a half-folded portion of a bag making machine forming a folded portion of a long packaging bag.

FIG. 6 is a perspective view showing a state in which a front fabric and a back fabric superimposed in a one-sided manner by a half-folded triangular plate in FIG. 6 are deflected and guided;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Packaging bag for long items 12 Opening 14 Bag body 16 Bottom 18 Folding part 20 Long items 28 Closure 30 Front fabric 32 Back fabric 34 One edge 36 One edge 38 Input opening 40 Other edge 42 The other Edge 44 half-folded part 46 draw-out superposition process part 56 triangular plate 32 guide part L wide surface

Claims (3)

(57) [Claims] (1) A front cloth and a back cloth having different widths are mixed with one another.
The dough, which is superimposed in a one-sided manner on the edge to form an input opening , and any one of the front and back fabrics has a wide width.
Turn the other edge of the fabric toward the other edge of the narrow fabric
Then, the folded portion is formed by joining, the front fabric and the back fabric having the folded portion are joined to the folded portion.
On the other hand, it is a length formed by fusing and closing with a certain width in the cross direction
Bags for packing things. 2. A dough having a width different from one of the front fabric and the back fabric, wherein the front fabric and the back fabric are polymerized in a one-sided manner on one edge to form an input opening. the other edge portion folded towards the other edge side of the narrow fabrics, joined to form a folded portion, and a table cloth and the back cloth to form the folded portion, the cross direction with respect to the folded portion of the A method for producing a long-length packaging bag, which is melted and closed at a fixed width. 3. The front and back cloths having different widths are each
Rolled, the end of the rolled top fabric
While pulling out the end of the rolled backing fabric
3. The method according to claim 2, further comprising a draw-out polymerization step of polymerizing in a one-sided manner.
Manufacturing method of packaging bags for long goods.