JPH04154555A - Folding hand bag - Google Patents

Abstract

PURPOSE:To permit folding hand bags to be formed completely mechanically and automatically from a single sheet by a method wherein a folded bottom part is provided in the center of a thermoplastic synthetic resin sheet, an opening part of the bag is formed consisting of a single sheet made up of the overlapped sheets having their ends heat bonded, this opening part is reinforced and grip members are attached to the reinforced part. CONSTITUTION:The plastic film sheet 1 having its surface printed is folded in half and then given another fold to form a gusset bottom part 2. Thick strip-like boards 3 almost the same in width as a bottom plate 6 are thermally or adhesively attached temporarily to both edges of the sheet 1. The thick boards 3 are rolled over together with the ends of the sheet 1 to form a reinforced opening part 4. The bottom plate 6 consisting of a thick paper is first spot fused to one side face 5 of the folded gusset bottom part 2 and then securely attached thereto by a fusing part 7. After the superfluous parts 8 of the gusset bottom part 2 are thermally cut off, both edges 9 of the folded sheet 1 are thermally bonded together. Grip-mounting holes 10 are formed in the edge of the reinforced opening part 4 and the existing grip members 11 are fitted into the holes 10 therein.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a plastic sheet carrying bag used for carrying cans of beer and the like.

[Conventional technology]

In the specification of Japanese Patent Application No. 1-155004, the applicant has completed the developed view of Fig. 5 and Fig. As shown in the figure, a folded bottom part 27 is formed in the center of the thermoplastic synthetic resin sheet piece,
A bottom plate 26 is fixed to this bottom part 27 so as to be expandable, and a fused part 22.23 is formed at the end of the sheet piece to form a bag body 21 made of folded plastic sheets and an opening 24 of this bag body. A foldable carrying bag 30 made of a single sheet with a carrying member 25 fused is proposed.

Compared to previous carrier bags, this carrier bag simplifies the processing process for the raw material sheets, allowing for complete mechanization and automation. The bag is set in the lid, which simplifies the preparation process for use. It is as convenient to store and transport as conventional bags. The flat surface of the bag makes it easy to apply printing, and the function of the bag is improved. It is possible to achieve effects such as increasing the number of people.

[Problem to be solved by the invention]

However, this carrier bag has a structure in which the carrier member is prepared and attached separately from the bag body, and the carrier member 25 is attached separately.
For this reason, it is necessary to separately prepare a relatively thick synthetic resin material punched out with a mold. Therefore, it is necessary to prepare a mold for each bag size and purpose for which the bag will be used. This is an impediment to reducing the cost of producing this type of carrier bag.

The problem to be solved by the present invention is to find a means for solving the problem of attaching the carrying member in the carrying bag made from the single sheet disclosed above and making it possible to streamline the entire production process. [Means for Solving the Problems] The present invention provides a bag body made of a single sheet made by providing a folded bottom part in the center of a thermoplastic synthetic resin sheet piece and fusing the ends of overlapping sheet pieces; A folding carrier bag comprising a carrying member attached to an opening of the main body, and the folded bottom part has a bottom plate fixed to one inner side of the folded bottom part. It is characterized in that it is reinforced and the handbag member is attached to the reinforced portion.

The reinforced portion of the opening can be constructed by bending the upper end of the bag body, inserting a cardboard or plastic plate into the bent portion, and fusing it.

Furthermore, it is also possible to attach a handbag member prepared in advance by heating and fusing the entire bent portion.

[Effect]

By changing the starting material for the bag body from the conventional chinibu-shaped material to a sheet material, bending, fusing, and fusing become easier, and most of the processes can be automated. Furthermore, multicolor printing on the surface of the bag is also possible. , the function as a promotional product can be further enhanced.

Furthermore, since the bottom paper cannot be fixed by means such as welding to the inside of the bottom of one of the folded parts that form the bottom, it naturally becomes the bottom material when the bag is unfolded, and requires special processing to be used as the bottom material. There is no.

Furthermore, the opening of the bag body can be created in a series of molding processes for the bag body, so even if a process to strengthen this opening is included, it can be created separately and welded according to the bag body. Compared to the bag disclosed in the above-mentioned application, the number of steps is increased and the cost does not increase.

In addition, since the entire surface of the opening is reinforced, it is possible to attach a commercially available standard carry member regardless of the size of the bag body.

〔Example〕

FIG. 1(a) to ←0 are diagrams showing the bag manufacturing process of the present invention in order of process.

First, as shown in Figure 1(a), a piece of plastic film sheet l with a thickness of 10 to 100 μm is printed on the surface in advance.
The bottom part 2 of the gusset is formed by folding it in half as shown in FIG. 0 and further folding it in as shown in FIG. Next, as shown in FIG. 6 (6) and FIG. Temporarily fasten with. Furthermore, as shown in FIGS. 2(f) and 2(8), the cardboard mount 3 is rolled up and the end of the sheet piece 1 is bent to form a reinforced opening 4.

Next, as shown in the first drawing and its cross-sectional view (]), a bottom plate 6 made of cardboard is point-welded to one side 5 of the folded gazette bottom 2 and fixed by a welding part 7. do.

Next, as shown in FIG. 1(j), after cutting off the unnecessary portion 8 of the folded gazette bottom 2, both edges 9 of the folded sheet piece 10 are welded. Furthermore, as shown in the same figure, a hole lO for attaching the handle member is drilled in the reinforced opening edge 4, and the existing handle member 11 is attached to the hole 10 of the reinforced opening edge 4. The carrier bag 12 shown in 1) is completed.

Figure 'M2 is a diagram showing a folded state of the carrier bag 12 manufactured by the steps shown in Figures 1(a) to (J) above, and Figure gJ3 is a diagram showing a cross-sectional view thereof. In this way, in the folded state, it becomes a thin and flat state, which is convenient for storage.

〔Effect of the invention〕

The following effects can be achieved by the present invention.

(1) Manufacturing costs can be reduced because there is no need to specially create a handle member depending on the width of the bag and the purpose of use.

(2) - Can be manufactured from sheet materials through more complete mechanization and automation.

(3) The handle attachment process, which conventionally relied on manual labor, can be completely mechanized and automated.

[Brief explanation of the drawing]

FIGS. 1(a) to (Il) are diagrams showing the manufacturing process of the carrier bag of the present invention. FIG. 2 is a diagram showing the foldable carrier bag 12 of the present invention in a folded state, and FIG. 3 is a sectional view of FIG. 2. FIG. 4 is a diagram showing the previously proposed carrier bag in a folded state, and FIG. 5 is an exploded view thereof. Synthetic resin sheet piece 2: Bottom 3: Cardboard mount 4:
Reinforced opening 5: One side of the bottom 6: Bottom plate
7: Fusion part 8: Unnecessary part 9: Both edges
10: Hole 11: Gripping member 12: Carrying bag Patent applicant Nagasa Kako Co., Ltd. Representative Masu Kohori (i) (j) (k) (i) (j) (k) (i) (j) (k)

Claims (1)

[Scope of Claims] 1. A bag body made of a single sheet made by providing a folded bottom part in the center of a thermoplastic synthetic resin sheet piece and fusing the ends of overlapping sheet pieces, and an opening of the bag body. A foldable carry bag, which comprises a carry member attached to the folded bottom part, and the folded bottom part has a bottom plate fixed to one inner side of the folded bottom part, wherein the end part constituting the opening of the bag body is strengthened and A carrying bag characterized in that the carrying member is attached to a reinforced portion.