JPH0734834Y2 - Simple warm and cool bag - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inexpensive heat-retaining simple bag which has a soft texture and can be mass-produced so that the heat-retaining and cold-retaining effects can be maximized.

[0002]

2. Description of the Related Art Conventionally, as in Japanese Utility Model Laid-Open No. 58-52169 "Heat Keeping Cool Bag", a fabric is laminated on the foamed plastic sheet side of a composite sheet consisting of a metal vapor deposition film and a flexible foamed plastic sheet, and the periphery is sewn A heat-retaining bag that is worn in a bag shape is provided.

[0003]

The heat-retaining and cooling bag described in the preceding paragraph and the prior art comprises three layers of a metal vapor deposition film, a flexible foam plastic sheet and a cloth, but each layer is composed of different materials. However, it is not suitable for heat welding and heat cutting, and is not suitable for mass production because it requires manual sewing, and it has the drawback of making the product expensive.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to provide a styrene foam resin sheet between a front film and a back film made of polyethylene film. The bag is made of a three-layered structure with the interposition of, and each of the layers is independent of each other, and the inner folded portion is provided only in the upper opening of the bag, and the folded portions of the front and back portions are formed. By forming a solidified portion by heat welding in a predetermined row in the inner side of, and by providing a pair of linear sealing engagement pieces on the inner side of the solidified portion in the front and back portions, the airtightness inside the bag is perfected, It is intended to provide an inexpensive simple bag that keeps warm and cool.

[0005]

[Means for Solving the Problems] In order to achieve the above-mentioned object, in the simple bag for keeping warm and cold in this invention, a styrene foam resin sheet is interposed between a front film and a back film made of polyethylene film. The bag is made of a three-layered structure, the layers are made independent of each other, and the inner folded portion is provided only in the upper opening of the bag body, and the inner folded portions of the front portion and the back portion are provided at predetermined positions. The solidified portions are formed in the rows by heat welding, and a pair of linear sealing engagement pieces are provided inside the solidified portions in the front and back portions.

Further, a plurality of pairs of linear sealing engagement pieces can be provided inside the solidified portions in the front and back portions.
Furthermore, both ends of the pair of linear sealing engagement pieces may be fixed to the front and back inner sides of the solidified portion in a concave-convex engagement state.

[0007]

The pair of linear sealing engagement pieces, that is, the concave portion and the convex portion, are pressed against the inner portions of the solidified portions of the front portion and the back portion so as to be fitted in an airtight manner. Since the bag body is formed of the three-layered structure, an air layer is interposed between the layers, and this air layer greatly contributes to keeping warm and cool.

[0008]

EXAMPLES Examples will be described with reference to the drawings. 1 to 3, a bag body a made of a three-layer structure is formed by interposing a styrene foam resin sheet layer 3 between a front film layer 1 and a back film layer 2 made of a polyethylene film. The two are kept independent from each other so that they slip.

The inner folded portion 5 is provided only in the upper opening 4 of the bag a. A solidified portion 6 is formed by heat welding in a row inside predetermined positions of the folded-back portions 5 and 5 of the front and back portions of the bag body, and a recessed piece 7 that engages with the inner portions of the solidified portions in the front and back portions is provided. And a pair of linear sealing engagement pieces 9 each of which is composed of a convex piece 8 and a convex piece 8. As shown in FIG.
By providing the pair of linear sealing engagement pieces 9 over a plurality of lines, a more stable plurality of engagements can be obtained.

In order to ensure the engagement of the pair of linear sealing engagement pieces 9 composed of the concave piece 7 and the convex piece 8, the concave pieces 7 and the convex portions at both ends of each linear sealing engagement piece 9 are secured. The recessed piece 7 is fixed by fixing the fixed part 10 in the engaged state with the piece 8.
There is no mistake in the corresponding position of meshing between the convex piece 8 and the convex piece 8. In addition, 11 is handheld.

[0011]

Since the present invention is constructed as described above, the following effects can be obtained. The simple bag for keeping warm and cold according to claim 1, wherein the bag is made of a three-layered structure in which a styrene foam resin sheet layer is interposed between a front film layer and a back film layer made of a polyethylene film, and each of the layers is formed. Since they are independent from each other, the texture when sliding between the layers occurs and the texture is very good, and when the cooling product is stored inside the bag, for example, in addition to the cooling effect due to the three-layer structure overlapping, Since the respective layers are kept independent from each other, an air layer is formed between the respective layers so that further cooling can be obtained. Moreover, the inner folded portion is provided only in the upper opening portion of the bag body, and the solidified portion is formed by heat welding at a predetermined position inside the folded portion of the front portion and the back portion to form the solidified portion. Since the pair of linear sealing engagement pieces are provided on the inner side, there is an effect that the sealing operation can be facilitated. Further, according to claim 2, a plurality of pairs of linear sealing engagement pieces are provided on the inner side of the solidified portion in the front portion and the back portion, whereby the engagement of one linear sealing engagement piece is accidentally disengaged. However, the sealing performance of the bag body is maintained by the engagement of other linear sealing engagement pieces. When a plurality of engagements are performed, accidental disengagement of the engagement is unlikely to occur. Further, in claim 3, since both ends of the pair of linear sealing engagement pieces are fixed to the front portion and the inner portion of the back portion of the solidified portion in the concave-convex engagement state, the pair of linear sealing engagement pieces is fixed. Since the relative positions of the both end portions of the concave-convex engagement state do not always erroneous, the airtight work can be quickly achieved.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a main part of a simple bag for keeping warm and cold in which a linear sealing engagement piece is used at one place.

FIG. 2 is a perspective view of a simple bag for keeping warm and cold.

FIG. 3 is a sectional view of the bag body showing a stored state.

FIG. 4 is an enlarged cross-sectional view of a main part of a simple bag for keeping warm and cold, which uses linear sealing engagement pieces at two places.

[FIG. 5] Enlarged cross-sectional view of the three-layer structure overlapping ground 1 front film layer 2 back film layer 3 styrene foam resin sheet layer 4 upper opening 5 folding part 6 solidification part 7 concave part 8 convex part 9 linear sealing member Joint piece 10 Fixed part

Claims (3)

[Scope of utility model registration request] 1. A bag made of a three-layered structure in which a styrene foam resin sheet layer is interposed between a front film layer and a back film layer made of a polyethylene film, and the layers are independent of each other. Together with this, the inner folded portion is provided only in the upper opening portion of the bag body, and the solidified portion is formed by heat welding in a predetermined position inside the folded portion of the front portion and the back portion, so that the solidified portion of the front portion and the back portion is formed. A simple bag for keeping warm and cooling, characterized in that a pair of linear sealing engagement pieces are provided on the inner side. 2. The simple heat-retaining / cooling bag according to claim 1, wherein a plurality of pairs of linear sealing engagement pieces are provided on the inner side of the solidified portion in the front and back portions. 3. A simple heat-retaining and heat-retaining apparatus according to claim 1, wherein both ends of a pair of linear sealing engagement pieces are fixed to the front and back inner sides of the solidified portion in a concave-convex engagement state. bag.