JPH0626536U - Carrying bag - Google Patents

Abstract

(57) [Summary] [Structure] The handbag of the plastic handbag having a square bottom. The tip of the fusion line of the handbag is curved to disperse the force concentrated there. [Effect] The present invention makes it possible to efficiently and easily manufacture a plastic handbag that is convenient to use and strong, and is very useful for the bag-making industry, which has a large market such as a bag for storing old newspapers. It is a useful idea.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a plastic bag.

[0002]

[Prior art]

 Due to the simplicity of the plastic bag, it is very widely used, and this manufacturing industry forms a huge market. As one of these plastic handbags, a very characteristic plastic handbag is proposed in Japanese Examined Patent Publication No. 52-39342. This bag has a feature that the handbag part is initially folded over the upper part of the bag body part and that the handbag part can be pulled out and used at the time of use. The bag proposed here has the handbag film 4 attached to the outside of the opening 2 as shown in FIG. 7, and the handbag film 4 attached to the inside of the opening 2 as shown in FIG. There are two types of things. The former plastic bag is convenient for use because it can be grasped like an eagle when pulling out the bag, but it is difficult to manufacture, so it is usually a bag with the film on the inside folded. Are manufactured. Further, the plastic handbag proposed in the above-mentioned patent publication does not have a square bottom shape, but a gusset fold can be formed on this bottom to form the square bottom by a known method. That is, if four corner-bottom fusion lines are provided at the bottom and bottom of the gusset fold at the bottom and four corners on the left and right to make it a corner bottom, the bag body becomes a rectangular parallelepiped shape, and paper of a certain size such as a rectangular body or a newspaper. It becomes possible to stack and store items. In this way, the strength of the handbag becomes an important issue when the volume of the storage part increases due to the corner bottom.

[0003]

[Problems to be solved by the device]

 An object of the present invention is to provide a plastic handbag in which the strength of the handbag portion of the plastic handbag proposed in the above patent publication is improved.

[0004]

[Means for Solving the Problems]

 When the present inventor puts a heavy object in the handbag and hangs it, and gradually increases the contents to be stored, a force locally suspends the force at the tip of the obliquely fused portion of the handheld tape of the handbag and the opening edge. Then, it was observed that the film was torn from the tip of the fused portion. Therefore, we thought of distributing the force concentrated at the tip of the fusion zone, and by bending the tip in the horizontal direction and changing the position where the force is concentrated from a point to a line, we achieved the force dispersion. Completed the present invention.

That is, according to the present invention, gazette folds are provided on the upper and lower sides of a long tube-shaped thermoplastic film stock, and the hand fold film is formed by cutting the central fold of the upper gusset fold, and further, the center of the opening. The upper edge corresponding to is cut out to separate the handbag film and the opening, and fusion fusion is performed for each bag width, the fusion edges are left and right side edges, and the lower gusset fold is the corner bottom. , A bag with an opening at the top, and at the bottom corners of the gusset fold at the bottom of the bag, connect the four corner-bottom fusion lines so as to separate the approximately isosceles right triangles at the four lower corners. The corner bottom fusion line is formed by fusing and fixing a pair of films for each of the front and back sides of the gusset fold separately for each pair, while forming the corner bottom shape, while the vicinity of both ends of the handhold film is provided. So, in the upper left and right corners of the opening on the front and back, In the handbag bag in which four diagonal hand-held fusion lines spread in the direction of the left-right side are provided, and the hand-held film is fixed on the opening film separately, the left and right hand-held fusion lines are upward. The present invention provides a handbag which is characterized in that it extends to both ends at an angle of about 45 degrees from the folded back edge of the opening edge and has its tip curved in the horizontal direction.

The present invention will be described in detail with reference to the drawings of the embodiments. In the plastic bag of FIGS. 1 and 2, the two rectangular films on the front and back sides are composed of one plastic film integrally connected via the bottom 3. The left and right side edges are fused by the side edge fusion line 6 to form the bag body 1. As for the shape of the bag body of the present invention, not only a vertically long rectangular shape but also a horizontally long rectangular shape and a square shape can be used when viewed from the side.

A handbag film 4 is extended from the opening film 13 on both the front and back sides by bending inward at a fold line 9. At the center of the fold line 9, the handpiece film 4 is separated from the opening film 13 by the notch 17. Also, a known method for forming a square bottom is applied to the bottom of the bag of the present invention. That is, a gusset fold is also formed on the bottom portion 3 so that the cross section has a W shape as shown in FIGS. 2 and 3, and the bottom inner portions are formed on the front and back sides at the four corner bottom fusion bonding lines 18 on the right and left sides. By separately fusing and fixing the two pairs of films, the film 15 and the bottom outer film 16, which face each other, the bottom portion 3 of the bag portion can be formed into a square bottom shape.

According to the present invention, the opening film 13 and the hand-holding film 4 facing it are fused at the four hand-welding fusion lines 5 that spread downward on the left and right of the upper part of the opening film 13 and on the front and back. It is worn and fixed. The angle of the hand-held fusion line 5 is about 45 degrees. The length of the handbag fixing portion 5 can be increased according to the weight of the bag body portion. For that purpose, it is necessary to increase the vertical width of the handbag film 4.

[0009] The tip portion A of the hand-held fusion line 5 of the bag of the present invention is bent in the horizontal direction, and in the conventional bag, the force is concentrated on the tip of the hand-held fusion line. , The local force is distributed on the line of the tip A that is bent in the horizontal direction, so that the tip of the handbag film is not damaged. The tip A of the fusion wire 5 of the present invention can be bent in the horizontal direction and then further raised upward.

Further, although the hand-held fusion line 5 starts from the folded edge of the opening, if the hand-held fusion line 5 is provided inside the lower corner bottom fusion line 18 as shown in FIG. When suspending the bag, the handbag film has a shape extending from the inner side surface of the bag portion as shown in FIG. 4, and can be suspended in the shape of FIG. Further, in the case of FIG. 5, the intersection 12 of the hand-held fusion line and the upper edge is located just above the intersection 11 of the lower corner bottom fusion line 18 and the lower edge. By doing so, the bag body portion can be suspended in a rectangular parallelepiped shape as shown in FIG. The two handbag films 4 are attached so as to cross the bag body in parallel in the vertical direction as shown in FIG. The rectangular parallelepiped bag is convenient because it can store box-shaped ones or stacked regular ones like old newspapers.

The handbag of this embodiment can be manufactured in a continuous bag-making process. First, while continuously pulling out a long tube-shaped film original, gusset folds are provided on the upper and lower sides thereof as shown in FIG. 3 to form a W-shaped cross-sectional structure on the upper and lower sides. The fold line 8 in the upper center of this fold is continuously cut with a knife. Then, the center fold line of the upper edge is cut out to separate the handbag film 4 from the opening film edge. This notch process can be performed at any stage of the process and the order can be changed. For example, after manufacturing the bags, it is possible to stack a large number of bags and incorporate a punching step as a final step.

Next, a metal separating plate is inserted between the upper and lower gusset folds, and hot trowels are applied from above and below to separately attach the film pairs of the gusset folds on the front and back sides by hand-bonding shown in FIG. 1 or 5. Lines and corner bottom fused lines are formed. In these processes, it is convenient to carry out the construction of the fusing line and the corner bottom fusing line of the next bag at the same time on the boundary line with the next bag. In this case, the tip of the hand-held fusion line is curved in the horizontal direction. Since the tip of the square bottom fusion line is continuous with the adjacent bag, use a convex continuous one so that the hot iron can be applied at the same time as the fusion of the next bag. Normally, as the hot iron, in the present invention, it is desirable to use one having a rounded tip. If a fusion line that intersects the boundary line at an angle of 45 degrees is used, the weight of the corner bottom will be concentrated on this tip when the boundary line is cut in a later process, and the bag will break. It becomes easy to be damaged.

As shown in FIGS. 1 and 5, when the corner bottom fusion line 18 intersects the side edge 6 at an angle substantially perpendicular to the side edge 6, the concentration of gravity as described above is eliminated, and the side edge is formed in the bag manufacturing process. When fusing, even if the fusing line that should come on the boundary line is slightly shifted, the shapes of the corner bottom fusion lines of the left and right bags are the same, and even if there is an error in the fusing position, the strength does not decrease. Not good. As described above, the long raw fabric film on which the corner bottom fusion line 18 and the hand-held fusion line 5 have been constructed is then cut by fusing the border line by applying a hot blade for each width of the bag. It can be obtained with the handbag folded as shown in FIG.

[0014]

[Effect of device]

 INDUSTRIAL APPLICABILITY The present invention makes it possible to efficiently and easily manufacture a plastic handbag that is convenient to use and strong, and is very useful for the bag-making industry, which has a large market such as bags for storing old newspapers. It is a device.

[0015]

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a handbag according to the present invention.

[0016]

FIG. 2 is a vertical sectional view of one embodiment of the handbag according to the present invention.

[0017]

FIG. 3 is a cross-sectional view of a tubular film provided with gusset folds at the top and bottom for use in manufacturing the handbag according to the present invention.

[0018]

FIG. 4 is a perspective view showing the shape of the handbag according to the embodiment of the present invention when it is used.

[0019]

FIG. 5 is a front view of another embodiment of the handbag according to the present invention.

[0020]

FIG. 6 is a perspective view showing the shape of the handbag shown in FIG. 5 when in use.

[0021]

FIG. 7 is a perspective view of a known plastic handbag.

[0022]

FIG. 8 is a perspective view of a known plastic bag.

[0023]

[Symbols in the figure]

 1 bag body film 2 opening part 3 bottom part 4 handhold part film 5 handbag fusion line 6 side edge fusion part 7 gazette fold 8 gazette fold 9 gazette fold 10 gazette fold 11 corner bottom fusion line and lower edge 12 handwork Intersection point of fusion line and upper edge 13 Opening film 15 Bottom inner film 16 Bottom outer film 17 Notched portion 18 Square bottom fusion line A Hand-held fusion line tip curved part B Corner bottom fusion line curved part

Claims (3)

[Scope of utility model registration request] 1. A gusset fold is provided on the upper and lower sides of a long tube-shaped thermoplastic film stock, a center fold of the upper gusset fold is cut to form a handbag film, and the upper part corresponding to the center of the opening is formed. Cut off the edge and separate it from the handbag film and the opening, fuse and fuse each bag width to make the fused edges the left and right side edges, the lower gusset fold part the corner bottom, and the upper part as the opening. The bottom of the bag is provided with four corner-bottom fusion lines so as to divide a substantially right-angled isosceles triangle at four corners on both sides of the gusset fold, and the corner-bottom fusion is performed. The line is formed into a square bottom shape by separately fusing and fixing a pair of films on each side of the gusset fold, and on the other hand, on the other hand, in the vicinity of both ends of the handhold film, the left and right sides of the opening on both sides are formed. In the upper corner, a diagonal line that spreads to the left and right side edges In a handbag that is provided with four hand-held fusion lines, by which the hand-held film is fixed separately on the front and back of the opening film, the left and right hand-held fusion lines are approximately 45 degrees from the fold of the upper opening edge. A handbag which is characterized in that it extends to both ends at the angle of and the tip is curved in the horizontal direction. 2. The handbag according to claim 1, wherein the upper ends of the four corner bottom fusion bonding lines are curved so as to be substantially perpendicular to the side edges of the bag. 3. The handbag according to claim 1 or 2, wherein the intersection of the hand-held fusion line and the upper edge of the opening is formed above the intersection of the corner bottom fusion line and the bottom fold. bag.