JPH0593239U - Carrying bag - Google Patents

Abstract

(57) [Summary] (Corrected) [Structure] By removing the notch 17 at the upper edge fold corresponding to the center of the opening 2, the handbag film and the opening film are separated, and each bag width is different. A bag in which the left and right side edge fused portions 6 are formed by fusing, the lower gusset fold portion has a square bottom, and the upper portion has an opening portion, which is located in the vicinity of both ends of the handbag portion film and on the front and back openings. At the upper left and right corners, four slanting hand-held fusion wires 5 extending in the left-right side edge direction are provided, and the side edge portion direction is 30 mm from the intersection of the hand-held fusion wires and the upper edge. A handbag which is characterized in that both ends of the notched portion at the upper edge of the opening are on the outside of the. [Effect] It is possible to efficiently and easily manufacture a plastic handbag that is convenient to use and strong.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a plastic film carrying bag in which a carrying film is folded inside an opening.

[0002]

[Prior Art]

 Due to the simplicity of plastic film handbags, they are very widely used, and this manufacturing industry forms a huge market. As one of these plastic handbags, a characteristic plastic handbag is proposed in Japanese Patent Publication No. 52-39342. This bag is characterized in that the handbag portion is first folded into the upper edge of the opening of the bag body, and the handbag portion can be pulled out and used at the time of use. The bottom of the plastic handbag proposed in the above patent publication is not a square bottom shape, but a gusset fold can be formed on this bottom to form the bottom corner by a known method. In other words, 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 the corner bottom, the bag body becomes a rectangular parallelepiped shape, and newspapers of fixed size such as newspapers are formed. It becomes possible to stack and store in the shape of a rectangular parallelepiped. When the volume of the storage portion becomes larger due to the corner bottom, the weight of the storage material increases significantly, and the strength of the handbag becomes a particularly important problem. In the conventional bag of this type, depending on the state of the stored items, the handbag often does not have uniform gravity depending on the inclination of the handheld fusion part. Gravity may be unevenly distributed and applied. In particular, if gravity is applied to the upper end of the hand-held fusion line, the film at the end of the notch will limit the direction of the hand-held film, and if it is hung, this part may be forcibly pulled and damaged. There is.

[0003]

[Problems to be solved by the device]

 An object of the present invention is to provide a handbag bag in which the strength of the handbag portion of the plastic film handbag bag of the type described in the above publication is improved.

[0004]

[Means for Solving the Problems]

 In order to prevent damage to the upper part of the hand-held fusion line when the hand-bag is suspended, the inventor first matches the upper end of the hand-held fusion line with both ends of the notched part. Based on this finding, various investigations were conducted, and the present inventors completed the present invention by selecting a range that yields an effect that is almost the same as when both parties agree.

That is, according to the present invention, in a structure in which a gazette fold is provided on the upper and lower sides of a long tube-shaped thermoplastic film stock, an inner center fold of the upper gusset fold is cut to form a handbag film. Furthermore, the handbag film and the opening film are separated by notching the upper edge corresponding to the center of the opening, and the left and right side edges are formed by fusing and fusing for each bag width, and the lower gusset is formed. A bag having a square bottom at the fold and an opening at the top, and four bags are formed by dividing four isosceles right triangles at the lower corners of the four gusset folds at the bottom of the bag. A corner bottom fusion line is provided, and the corner bottom fusion line forms a corner bottom shape by separately fusing and fixing a pair of films on each of the front and back sides of the gusset fold, while forming the corner bottom shape. Near both ends of Therefore, four diagonal hand-welded fusion wires extending in the left and right side edges are provided at the upper and left corners of the opening on the front and back sides, whereby the hand-held film is fixed separately on the front and back sides of the opening film. The handbag is characterized in that both ends of the notched portion at the upper edge of the opening are located outside the position of 30 mm from the center of the bag body from the intersection of the fusion line and the upper edge. It is intended to provide a handbag to carry.

The plastic film used in the present invention can be used without particular limitation as long as it is a thermoplastic resin film. For example, polyolefin plastic films such as polyethylene and polypropylene are particularly suitable. The present invention will be described in more detail with reference to the drawings of the embodiments. In the plastic film bag shown in 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 portion 3. The left and right side edges are fused by the side edge fusion line 6 to form the bag body 1. The shape of the bag body of the present invention is not limited to the vertically long rectangular shape as viewed from the side plane as shown in FIG. 1, but may be the horizontally long rectangular shape or the square shape.

As shown in FIG. 3, the basic structure of the handbag according to the present invention is such that the handbag film 4 is extended from the opening film 13 on both front and back sides by bending it inward at the upper edge fold 9. Then, the fold 8 inside the upper gusset is cut to separate the left and right hand-held films 4 as shown in FIG. At the central portion of the upper edge fold 9, the handbag film 4 is separated from the edge of the opening film 13 by the shallow trapezoidal notch 17 in FIG. 1 as shown in FIG. In this way, as shown in FIG. 2, the tape-shaped hand-held film 4 is formed separately inside each of the left and right opening films 13. A well-known method of 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. By separately fusing and fixing two pairs of opposing films, the inner film 15 and the bottom outer film 16, 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 the four hand-welding fusion lines 5 spread downward on the left and right of the upper part of the opening film 13 and on the front and back sides. It is worn and fixed. The angle of the hand-held fusion line 5 is about 45 degrees. Depending on the weight of the bag body, the length of the handbag fixing portion 5 can be increased as necessary. For that purpose, it is necessary to increase the upper and lower widths of the handbag film 4. The tip portion A of the hand-held fusion wire 5 of this embodiment is bent in the horizontal direction, and the force concentrated at the tip of the hand-held fusion wire is dispersed on the line of the tip portion A bent in the horizontal direction. The tip of the film will not be damaged. The tip portion A of the fusion wire 5 of this embodiment can be bent in the horizontal direction and then further bent upward.

Further, although the hand-bonded fusion wire 5 of this embodiment starts from the folded edge 9 of the opening, if it is provided inside the lower corner-bottomed fusion wire 18, when the bag body is suspended, As shown in FIG. 4, the handbag film 4 has a shape extending from the left and right ends of the longer side of the vertically long bag portion. When hanging in the shape shown in FIG. It is located just above the section film 13 and the edges of the left and right opening film 13 are suspended right above. In the case of the embodiment bag as shown in FIG. 5, the intersection D of the hand-held fusion line and the upper edge is located exactly above the intersection 11 of the lower corner bottom fusion line 18 and the lower edge. There is. In this way, as shown in FIG. 6, when the bag portion is hung in a rectangular parallelepiped shape, the two handhold portion films 4 are extended from the short side of the opening film, and the bag portion as shown in FIG. It is attached so as to cross directly above the body in parallel to the vertical direction. When the hand-held film 4 is attached as in the case of FIG. 6, it is desirable that the surfaces of the two hand-held films 4 become horizontal as shown in FIG.

The rectangular parallelepiped bag is convenient because it can store box-shaped ones or can stack regular ones like old newspapers. The present invention is characterized by the positional relationship between the intersection D of the hand-held fusion line 5 and the upper edge (hereinafter referred to as the top end of the fusion line) and both ends C of the notch (hereinafter referred to as the notch end). First, the present invention will be described in detail with reference to an embodiment in which the intersection D and both ends C are the most basic embodiment. That is, in FIGS. 1 and 5 of this embodiment, the upper end D of the hand-held fusion line and the notched end C are aligned. At points C in FIGS. 4 and 6, as a result that the fixing points of the hand-held film 4 and the opening film 13 which are fixed by the fusion line 5 coincide with each other, as a result, the upper edge of the fusion line 4 has an excessive upper edge. Since there is no film, it has the advantage that no tears that cause damage will occur.

If there is a fusion line upper end D on the outside of the notched end C as shown in FIG. 7, the suspended state is between the base of the handbag film 4 and the opening film 13. In FIG. 7 and FIG. 8, there is a surplus film E shown by a dotted line. If the items to be stored are only at the bottom of the bag, the base of the bag can be moved freely, but the bag is filled with, for example, old newspapers folded in four and stacked. Since the movement of the base of the handbag 4 is restricted when it is stored up to the top, the excess film E of FIG. 8 is pulled and torn when it is hung. In the present invention, since the film E is not provided, the film is not damaged even when the position of the base of the handbag is limited.

The larger the distance between the point C at the notched end and the upper end D of the fusion line in FIG. 7, the more easily the film E is damaged. However, since the film E has a certain degree of elasticity, even if the points C and D do not almost completely match, even if there is some deviation, it is possible to obtain the strength of the handbag that is almost the same. it can. If the allowable distance is 30 mm or less, preferably 10 mm or less, the effect of the present invention can be almost obtained. Also, as shown in FIG. 9, even when the end portion C of the notch portion is outside the upper end D of the hand-held fusion line, the film E does not exist, so that the strength-enhancing effect of the hand-held portion of the present invention can be achieved. it can. In this case, as shown in FIG. 10, the fold 9 at the original upper edge only exists outside the hand-held film 4, and the hand-held film 4 smoothly suspends the hand-held fusion bonding line 5. Unreasonable power is not applied anywhere in the film.

In this case, it is desirable from the standpoint of strength that the upper portion of the hand-held fusion bonding line 5 is curved vertically as shown in FIG. The handbag of this embodiment can be manufactured in a continuous bag-making process. First, while continuously pulling out a long raw material of a tubular film, 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 8 in the upper center of this fold is continuously cut with a knife. Next, the center fold line of the upper edge is punched 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 a bag, it is possible to stack a number of bags and incorporate a punching process as a final process.

Next, a metal separating plate is inserted between the upper and lower gusset folds, and hot blades having a predetermined shape are applied from above and below, so that the two sets of the gusset folds on the front and back sides can be separately attached as shown in FIG. The fusing line and the corner bottom fusing line of FIG. 5 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, if desired, the lower tip of the hand-held fusion line can be curved horizontally, and the upper tip can be curved vertically to form the curved portion 12. Since the tip of the square bottom fusion line is continuous with the adjacent bag, use a continuous convex blade so that the hot blade can be applied simultaneously with the fusion of the next bag. Usually, as the hot blade, in the present invention, it is desirable to use a blade whose tip is circularly curved.

If the fusion line intersects the boundary line at an angle of 45 degrees with respect to the conventional boundary line, when the boundary line is cut in a later process, the weight of the corner bottom is concentrated on this tip, The bag is easy to tear. As shown in FIG. 1 and FIG. 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 fused in the bag making process. At this time, even if the fusing line that should come on the boundary line is slightly displaced, 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, which is desirable. As described above, the long original 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 boundary line with a hot blade for each width of the bag. It can be obtained with the handbag folded as shown in FIG.

[0016]

[Effect of the device]

 INDUSTRIAL APPLICABILITY The present invention makes it possible to efficiently and easily manufacture a plastic handbag that is convenient to use and strong. For example, when it is used as a bag for storing old newspapers, the bag body part is Even if the newspaper is full, the strength of the upper part of the fusion line of the handbag is high, so even if you stack a lot of newspapers and hang them in a full bag, the handbag will not be damaged. Absent.

[Brief description of drawings]

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

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

FIG. 3 is a sectional view of a tubular film having upper and lower gusset folds used for manufacturing a handbag according to an embodiment of the present invention.

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

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

FIG. 6 is a perspective view showing the shape of the handbag according to the embodiment of FIG. 5 when used.

FIG. 7 is an explanatory view showing the relationship between the positions of both ends of the notch in the hand-held film portion of the conventional bag and the upper end of the hand-held fusion bonding line.

FIG. 8 is a perspective view showing a suspension form in the case of FIG.

FIG. 9 is a perspective view showing a shape of a conventional bag when used.

FIG. 10 is a perspective view showing a suspended state of the embodiment of the present invention.

FIG. 11 is a perspective view of a conventional handbag.

[Symbols in the figure]

 1 bag film 2 opening part 3 bottom part 4 hand part film 5 hand part fusion line 6 side edge fusion part 7 bottom inner gusset fold 8 top inner gusset fold 9 top edge gusset fold 10 bottom gusset fold 11 corner bottom fusion line and Intersection with lower edge 12 Fusion line upper end curved portion 13 Opening film 15 Bottom inner film 16 Bottom outer film 17 Notched portion 18 Corner bottom fusion line A Hand-held fusion line Tip curve part B Corner bottom fusion line curve Part C Notched end D Intersection of hand-held fusion line and upper edge E Excess film

Claims (5)

[Scope of utility model registration request] 1. A structure in which a gazette fold is provided on the upper and lower sides of a long tube-shaped thermoplastic film stock, and an inner center fold of the upper gusset fold is cut to form a handhold film, and further, a center of the opening. The handbag film and the opening film are separated by punching out and removing the upper edge corresponding to, and the left and right side edge fused portions are formed by fusing for each bag width, and the lower gusset fold portion is A bag having a square bottom and an opening at the top, and four corner-bottom fusions so as to divide a substantially right-angled isosceles triangle at four lower corners at both ends of a gusset fold at the bottom of the bag. A line is provided, and the corner bottom fusion line forms a corner bottom shape by separately fusing and fixing a pair of films on each of the front and back sides of the gusset fold portion, while the corner bottom shape is formed near both ends of the handhold film. There are openings on the front and back On the left and right upper corners of the bag, four oblique line-shaped fusing lines are formed to spread in the direction of the left and right side edges, so that the hand bag can be attached to the opening film separately. From the intersection of the fusion line and the upper edge to the outside in the side edge direction from the position of 30 mm on the bag body center side,
A handbag which is characterized in that there are both ends of the notched portion at the upper edge of the opening. 2. The handbag according to claim 1, wherein both ends of the notched portion of the upper edge are substantially coincident with an intersection of the handheld fusion line and the upper edge. 3. The handbag according to claim 1 or 2, wherein the tips of the handheld fusion wires that extend obliquely downward to the left and right are horizontally curved. 4. The four corner bottom fusion bonding lines are curved so that the upper ends thereof are substantially vertical to the side edges of the bag body. Carrying bag. 5. The method according to claim 1, wherein the intersection of the hand-held fusion line and the upper edge of the opening is located above the intersection of the corner bottom fusion line and the bottom fold line. The carrying bag described in 4.