JPH0572743U - Product packaging bag - Google Patents

Abstract

(57) [Summary] (Correction) [Structure] The thin film 1 is polymerized and laminated on both front and back surfaces of the core sheet 5, and the header portion 4 fused and fixed at the side edges of the core sheet 5 and the front and back thin film 1 Front and back 2 extended downward
And a bag body portion formed by fusing both side edges of a plurality of superposed thin films 1, the lateral width of the main portion of the bag body portion being larger than the lateral width of the header portion 4,
In the header-equipped product packaging bag, the lower part of the header part 4 and the main part of the bag part are connected via the bag part upper structure formed by fusing the inclined side edges that open downward from the lower part of A lower end of the core material sheet 5 is extended to an upper part of the inclined side edge portion, and is fused and fixed to two thin films 1 at the inclined side edge portion. . [Effect] It is possible to completely prevent breakage of the boundary portion between both ends of the upper portion of the bag body, which has been a defect in the conventional product packaging bag having a narrow width in the header portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a product packaging bag in which the width of the packaging shape is substantially the same as the width of the header portion and the bag body portion when the product is stored.

[0002]

[Prior Art]

 Conventionally, in a product packaging bag with a header, the width of the header portion is made narrower than the width of the bag body portion at the time of manufacturing, and the bag body portion becomes thicker by accommodating thick products. There is known a product packaging bag in which the width of the bag portion is made substantially the same as that of the header portion when the width of the packaging body is narrowed (Japanese Utility Model Publication No. 55-23962 and Japanese Utility Model Publication 59-59-). No. 33786). This is because if the width of the header part is longer than the width of the bag body during packaging, it looks bad as a package and the sales floor area where the product package is displayed becomes narrower. The product packaging bag having a narrow header width is widely used. As shown in Fig. 6, these product packaging bags have a horizontal width of the header portion when the product is not stored, immediately after the manufacturing process, that is, when the bag body has a planar structure. The width of the bag is larger than the width of the bag, and the header and bag are connected via the bag upper structure that has an inclined fusion-bonded side edge that opens downward from the lower part of the header between the main part of the bag and the header. They are connected, and the step due to the difference in lateral width between the two is continuously eliminated by this inclined fusion-bonded side edge portion. When a thick product is stored in this bag, the header and the bag should be matched to the shape of the product so that the width of the bag body when displayed as a product package on the sales floor is almost the same as the width of the header. The width of the body is set. However, the lower edge A of the core material sheet of the header portion of these product packaging bags has an intersection C between the side edge E of the header portion of FIG. 6 and the inclined fusion-bonded portion B (beginning to become wider than the width of the header portion. Point), and the header side edge E is fused by a three-layer fusion structure of a core film and a thin film, while the slant fusion side of the upper part of the bag body part The edge B is formed by fusing a laminated structure of only two thin films. Therefore, when the product packaging bag is suspended at the intersection C of the header lower edge A, the inclined fusion-bonded side edge B, and the header side edge E, the gravity is concentrated, and the intersection C is easily damaged. There was a flaw.

[0003]

[Problems to be solved by the device]

 The present invention aims to increase the strength of a product packaging bag in which the width of the header is narrowed. As a result, it is possible to prevent the bag body from being damaged when the product package is hung and displayed.

[0004]

[Means for Solving the Problems]

 The present inventor has found that in a conventional product packaging bag in which the header portion is simply narrowed, there is an angle at the intersection C between the header portion and the inclined fusion-bonding side edge, and the hanging force is applied to the intersection C at the bent intersection. In addition, it is thought that there is a cause of low strength at the point where the header part, which is a three-layer laminated structure with the core material film, suddenly changes to a thin two-layer laminated structure at this intersection point C. Up to the above, by extending the three-layer laminated structure of the core sheet and the thin film, the intersection C where the force is concentrated becomes a fusion structure in which the same three-layer laminated structure as the header side edge fusion portion is fused and fixed. The present invention has been completed by eliminating the above-mentioned drawbacks by supporting the ability to concentrate by being concentrated.

That is, according to the present invention, a thin film is polymerized and laminated on both front and back surfaces of a core sheet, and a header portion fused and fixed at side edges of the core sheet and front and back 2 extending downward from the front and back thin film are formed. A bag body formed by fusing both side edges of a sheet of superposed thin film, wherein the lateral width of the main part of the bag body is larger than the lateral width of the header part, and from the bottom of the header part Bag body part formed by fusing the inclined side edges that open downwards. In the product packaging bag with a header in which the lower part of the header part and the main part of the bag body part are connected via an upper structure, the inclined side edges The present invention provides a product packaging bag characterized in that the lower edge of the core material sheet is extended to the upper part of the portion, and the inclined side edge portion is fused and fixed to two thin films. .. The present invention will be described in more detail with reference to the drawings of the embodiments. FIG. 1 is a plan view of an embodiment of the product packaging bag of the present invention, and FIG. 2 is a vertical sectional view thereof.

In the product packaging bag of this embodiment, the front thin film 1 is folded back so as to straddle the upper edge of the core sheet 5, and is extended to the back thin film 2, and as shown in FIG. To a lateral width of L to fuse and fix the side edges 4a and 4b thereof, and to fix the lateral edges 3a and 3b to a lateral width of the main part of the bag body portion 3 by M to fix the header portion 4 The slanted fusion bonding portions Ba and Bb, in which the intermediate side edge between the bag body portion 3 and the bag body portion 3 are fusion-fixed on the inclined side edge which is opened downward, serve as the side edge of the upper portion of the bag body portion and the lower side as the opening portion It forms the bag body part 3 which is formed. Under the sheet of the core material, the intersection Ca of the inclined fusion bonding portion Ba and the header portion side edge 4a and the intersection of the inclination fusion welding portion Bb and the header portion side edge 4b of this embodiment are extended to Ra and Rb below Cb. The edge tip is extended. As a result, the core sheet 4 and the side edges of the thin film 1 and the thin film 2 have a three-layer structure on the upper portions of the inclined fusion-bonded portions Ba and Bb, and the three sheets are integrally fused. .. The lengths of the tips Ra and Rb of the lower edge portion of the core sheet 4 extend to a length N longer than the lateral width L of the header. The lower edge of the core sheet 4 is separated from the header portion and the bag body portion 3 by the boundary fusion line 10 which is fused by heat sealing simultaneously with the thin film 1 and the thin film 2 in three layers, and at the same time, the header portion. Is increasing the strength of.

The boundary fusion line 10 of the present embodiment is in a desirable mode to be adopted as desired in the present invention. Furthermore, if desired, the boundary fusion line 10 is removed from the lower edge of the core sheet 4. Only the two thin films, the thin film 1 and the thin film 2, can be fused and fixed along the downward direction to form the boundary fusion line 10. Further, the boundary fusion line 10 can be provided at a position on the line connecting the intersection points Ca and Cb. In any of the above methods, both tips Ra and Rb of the lower edge of the core sheet 5 are located below the intersections Ca and Cb. In the present invention, if the positions of Ra and Rb are slightly below the intersections Ca and Cb, for example, 1 to 10 mm below, the purpose of sufficiently strengthening can be achieved. As a result, the distance N between Ra and Rb is 0.5 to 8 mm longer than the lateral width L of the header portion. If this length is too long, the width of the bag part will be larger than that of the header part.However, even if the width of the header part is narrower than the width of the header part of the package, the appearance will not be so bad. The strength can be further increased by increasing the distance between Ra and Rb.

Further, when a boundary fusion line 10 (for example, high frequency fusion) having a constant width is provided immediately below the line of the intersections Ca and Cb, the boundary fusion line 1 is formed at the intersection C. The fusion of 0 and the fusion of the inclined fusion cutting portion become bulky, the fusion fixation of this portion becomes stronger, and the reinforcing effect of the intersection portion where the force is concentrated becomes even greater. In the lower part of the present embodiment, the lower end of the thin film 1 is extended to form a sealing piece 8, and the sealing piece 8 is attached with a release paper 6 having an adhesive, and is sealed by a conventional method. be able to. It can be hung and displayed by the hanging hole 7. As a means for sealing the opening of the product packaging bag of the present invention, any known method such as heat sealing, hook type, and zipper type can be used. When a box of width L is stored in the product packaging bag of this embodiment with a thickness (hereinafter D) obtained by subtracting the width L from the width M, theoretically, the width of the bag portion during product packaging is L. Therefore, the bag part has a rectangular parallelepiped shape.

In reality, a box that can be stored with a margin is an item whose thickness or width is smaller than D or L. Further, the product stored in the product packaging bag of the present invention is not limited to the box type, and is suitable for storing a product having a little thickness. Then, the lateral width M of the bag body can be set according to the size of the product so that the lateral width of the bag body portion is close to the lateral width L of the header portion when the desired product is stored. In the present embodiment, the lower edge of the core material sheet reaches the position of the boundary fusion line 10 below the intersections Ca and Cb of the header side edges 4a and 4b and the inclined fusion portions Ba and Bb in FIG. is there. As a result, at the intersections Ca and Cb where the forces such as gravity are concentrated, since the core sheet 4 and the three thin film laminates are integrally fused, three forces are applied to the intersections Ca and Cb. Can be fully supported.

The present invention is not limited to the product packaging bag as shown in FIGS. 1 and 2, but may be a header at the time of manufacturing, as well as a product above the position of the opening and a structure in which the opening has a different sealing structure. As long as the lateral width of the portion is narrower than the lateral width of the bag body, it can be applied to all of the bags described in Japanese Utility Model Publication No. 59-337886. FIG. 3 shows an embodiment according to Japanese Utility Model Publication No. 59-33786. The upper structure of the bag body of this product packaging bag is characterized in that gusset folds 11 and 12 are provided in front of and behind the central header portion 4 as shown in the sectional view of FIG.

The gusset folds 11 and 12 at the front and rear of the central header portion 4 can be opened to have a three-dimensional structure as shown in FIG. 5 when the product is stored in a bag. In this case, the fold line 12 of the gusset fold becomes the ridge line 12 of the bag body, and the side faces of the bag body portion are formed so that the two fusion-bonded portions 13 of the gusset fold are spread on both sides of the inclined fusion-bonded portion Ba. Further, the fusion-bonded portion 3a on the side edge of the bag body is continuous to the center. The header portion 4 has a three-layer structure in which the thin film 1 is folded back so as to straddle the core sheet 5, and in this embodiment, the boundary fusion line is formed at the intersections Ca and Cb of the inclined portion and the header side edge. 10 is provided, and the lower edge of the core sheet 5 is further extended below the boundary fusion line 10. This extended portion is slightly expanded in a divergent shape, and its leading ends Ra and Rb are the header portions. A little wider than the width of.

In FIG. 3, a line connecting the leading ends Ra and Rb with a dotted line indicates the lower edge of the core material sheet in the thin film. In the present embodiment, in Japanese Utility Model Publication No. 59-33786, the lower edge of the core material sheet 5 of the header portion 4 coincides with the line of the intersection points Ca and Cb, but in the present embodiment, the line of the intersection points Ca and Cb. The lower edge of the core material sheet 5 is extended to a position slightly below. The present invention is that the lower edge of the core sheet 4 is below the intersections C a and Cb regardless of the position of the boundary fusion line 10. The boundary fusion line 10 in the embodiment of FIG. 3 can be made to coincide with the positions of Ra and Rb, and at a position slightly lower than this, only the thin film is fused to form the boundary fusion line 10. be able to.

[0013]

[Effect of the device]

 INDUSTRIAL APPLICABILITY The present invention can completely prevent the breakage of the boundary part between the upper and lower ends of the bag body, which was a defect in the conventional product packaging bag having a narrow width of the header portion, and provides a product packaging bag with high strength. Since it is possible to do so and the shape of the packaging is good, it is useful as a packaging bag for wide and thick products.

[Brief description of drawings]

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

FIG. 2 is a vertical sectional view of the product packaging bag of the embodiment.

FIG. 3 is a plan view of a product packaging bag according to another embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view of the same embodiment.

FIG. 5 is a perspective view of the same embodiment.

FIG. 6 is a plan view of a conventional product packaging bag.

[Explanation of symbols]

 1 Thin film 2 Back film 3 Main bag part 4 Header part 4a Header part side edge 4b Header part side edge 5 Core material sheet 6 Adhesive release paper 7 Hanging hole 8 Sealing piece 10 Boundary fusion line 11 Gazette Folding 12 Gazette Folding 13 Gazette Folding part Fusion line A Core sheet bottom edge B Inclined fusion part Ba Left inclined fusion part Bb Right inclined fusion part C Intersection of header part side edge and inclined fusion part Ca Left header Intersection of the side edge and the left slant fusion portion Cb Intersection of the right header side edge and the right inclination fusion portion L Header width M Header bag width N Core sheet bottom edge tip length Ra core Lower edge left edge of material sheet Rb Lower edge right edge of core sheet

Claims (3)

[Scope of utility model registration request] 1. A header portion in which a thin film is superposed and laminated on both front and back surfaces of a core sheet, and is fused and fixed at a side edge of the core sheet, and two front and back sheets extending downward from the front and back thin film are polymerized. A bag body portion formed by fusing both side edges of a thin film, the lateral width of the main portion of the bag body portion being larger than the lateral width of the header portion, and opening downward from the lower portion of the header portion. In a product packaging bag with a header in which the lower part of the header part and the main part of the bag part are connected via an upper structure of the bag part upper part formed by fusing the inclined side edge parts, up to the upper part of the inclined side edge part A product packaging bag, wherein the lower edge of the core sheet is extended and is fused and fixed to two thin films at the inclined side edge portion. 2. The product packaging bag according to claim 1, wherein three core materials and three thin films are fused and fixed at the same time at the lower edge of the core material sheet. 3. The product packaging bag according to claim 1, wherein only two thin films on the front and back are fused and fixed along the lower edge of the core sheet.