JP3251331B2 - Handbag and manufacturing method of handbag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic film handbag in which a handbag is folded inside an opening and a method for manufacturing the same.

[0002]

2. Description of the Related Art Plastic film handbags are very widely used because of their simplicity, and this manufacturing industry forms an enormous market. As one of these plastic handbags, a unique plastic handbag is disclosed in
No. 39342. This bag is handbag,
Before use, it is folded into the upper edge of the opening of the bag body, and is characterized in that it can be pulled out and used at the time of use. In addition, 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 the bottom as desired, and the square bottom can be formed by a known method. That is, if four corner bottom fusion lines are provided on the front and back of the bottom gusset fold and four lower corners on the left and right to form a square bottom, the bag body part becomes a rectangular parallelepiped, and paper of a certain size such as newspaper is rectangular parallelepiped. It can be stored in a stack. As described above, when the volume of the storage portion is increased due to the square bottom, the weight of the storage material is dramatically increased, and the strength of the handheld portion becomes a particularly important problem. In this type of conventional handbag, depending on the state of the stored goods, the handbag often has an inhomogeneity of gravity depending on the inclination of the handheld fusion splice. May be unevenly distributed. Conventionally, when manufacturing this bag, the film at the opening edge is bent by gusset folding, the fold is cut off, and the handheld film tape is separated from the opening edge. In this case, it is not easy to remove the film pieces generated by the notch in the continuous process, and there is a fear that the continuous bag making process may be hindered.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a handbag made of a plastic film of the type described in the above-mentioned publication, in which the strength of the handbag portion is improved and the steps are simplified. And

[0004]

SUMMARY OF THE INVENTION The inventor of the present invention cuts off the upper edge fold with a constant width in order to avoid the generation of a film piece when separating the handheld film tape by notching in the conventional manufacturing method. In this case, the upper edge of the hand fusion line intersects the upper edge at an acute angle, and if a force is concentrated here, it will be broken immediately. Finding out that bending can be avoided by bending the connection vertically,
The present invention has been completed based on this finding.

That is, the present invention provides the following: (1) Continuously processing a long tubular thermoplastic plastic film and finally fusing the side edges for each width of each bag. It is a method of manufacturing a handbag, first of all,
The raw material is continuously fed into a gusset folding process, and a gusset fold portion having two folds at the upper edge and one fold inside the center is provided in an M shape at the upper part corresponding to the opening of the handbag, The raw material that has been gusset-folded up and down is sent to the cutting process, where the upper edge M-shaped gusset fold is cut and separated along the central inner crease, and then the raw material separated from the upper edge M-shaped gusset fold is It is sent to the gusset fusing step, and in the fusing step, a backing plate is inserted between the upper edge folds. Each time, the hot blade is pressed against the inner backing plate from both the front and back sides of the upper edge fold, so that when it becomes a bag, it is inclined obliquely with a slope of about 45 degrees that goes down from the upper edge to the left and right side edges. Of the four hand-fused lines, the upper end of each of the hand-fused lines is the upper edge A film which is curved in the vertical direction and extends linearly to near the upper edge is provided, and the two films forming the two upper edge folds by the hand-sealing line are connected at four places. The fusion-fixed raw material is then sent to the upper edge cutting step and the side edge fusion step, and cut along the upper edge fold under the fold to form two upper edge fold portions. To separate the film from the edge of the opening,
A method of manufacturing a handbag, characterized by fusing on a line corresponding to a side edge for each width of the bag body, (2) Continuously processing a long tubular thermoplastic film raw material. Finally, a method of manufacturing a handbag by fusing side edges for each width of each bag body portion,
The raw material is continuously fed into a gusset folding step, and a gusset fold portion having two folds at the upper edge and one fold inside the center is provided in an M shape at the upper part corresponding to the opening of the handbag, W-shaped lower part corresponding to the bottom of the handbag
A gusset-folded part having a single fold is provided inside each piece and the center, and then the gusset-folded raw material is sent to the cutting process, and cut along the center inside fold of the upper edge M-shaped gusset fold. Separated, then, the raw material separated from the upper edge M-shaped gusset fold is sent to the gusset fusion step,
In the fusing step, a backing plate is inserted between the folds separated from the upper edge and between the two lower edge W-shaped gusset folds, and corresponds to the upper left and right upper corners of the bag. By pressing the hot blade against the inner backing plate from both the front and back sides of the upper edge fold at the interval of the width of the bag body, downward from the upper edge of the bag body to the left and right side edge direction It is four slanted hand-fused lines inclined at approximately 45 degrees, and the upper end of each hand-line fused line is curved perpendicularly to the upper edge and straightened to near the upper edge. The two films forming the two upper folds are fused and fixed at four places by the hand-held fusion line, and simultaneously with or before or after this upper fusion step Then, by pressing the hot blade against the backing plate from both sides of the fold of the lower edge, the bag In this case, two films are provided, each of which is provided with four oblique line-shaped fusion welding lines rising upward from the lower edge in the left and right side edge directions, and forming two lower edge folds by the respective fusion lines. Are fused and fixed at four places, and then the fixed material is fed to the upper edge cutting step and the side edge fusion step, and cut along the upper edge fold to cut two pieces under the fold. (3) a method of manufacturing a handbag, wherein the upper edge fold is removed to separate the handbag film from the edge of the opening, and the film is cut along a line corresponding to the side edge for each width of the bag body. 3. The method for manufacturing a handbag according to claim 2, wherein the upper end of the square-bottom fusion line is curved horizontally toward the side edge of the bag, (4) a plastic film continuous at the bottom. A bag formed by fusing a film that has been half-folded, has an opening at the top, and has left and right side edges polymerized. A hand tape is provided inside or outside the opening film, respectively, and the hand tape and the opening film are
The fusion splicing is carried out by the side edge portion and the hand fusion line, and the hand fusion line is provided obliquely at an inclination of approximately 45 degrees from the upper edge of the opening toward the side edge of the bag body, and the upper end of the hand fusion line The part is curved vertically toward the upper edge of the opening, the bottom is a square bottom structure, and the hand fusion splice line is located outside just above the lower end of the fusion line for the square bottom structure. (5) The handbag according to (4), wherein the upper end of the fusion line for the square bottom structure is curved in the horizontal direction. To provide.

[0006] The thermoplastic resin film used in the present invention comprises:
Any thermoplastic resin film that can be produced by inflation processing can be used without particular limitation. For example, polyolefin-based 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 embodiments. 1 and 2
In the plastic bag made of plastic film described above, the two rectangular films, which are superposed on each other, consist of a single plastic film connected integrally via the bottom 3. The left and right side edges are fused by the side edge fusion portion 6, and the bag 1
Is formed. As shown in FIG. 1, the shape of the bag of the present invention is not only a vertically long rectangle as viewed from the side plan view, but also a shape shown in FIG.
Can also be used.

As shown in FIG. 3, the basic structure of the embodiment of the handbag according to the present invention is such that the handbag film is extended inward from the opening film 13 on the front and back sides at the upper edge gusset crease 9 as shown in FIG. I have. Then, the portion of the upper inner gusset crease 8 is cut, and a portion several mm from the upper edge of the two upper edge gusset folds 9 in FIG. 3 is cut with a knife to form a sectional structure as shown in FIG. A tape-shaped hand-held film 4 is formed inside each of the opening films 13 so as to be separated. In the handbag of the present invention, as another embodiment, a tape-shaped handbag film can be provided outside the opening film 13. The one on the inside is preferable because it is easy to manufacture. A known method for forming a square bottom, if desired, is applied to the bottom of the bag of the present invention. That is, a gusset fold is also formed on the bottom 3 so that the cross-section becomes W-shaped as shown in FIGS. 2 and 3, and four corner bottom fusion lines 18 on the front and back and left and right in FIG. If the two pairs of films facing each other of the film 15 and the bottom outer film 16 are separately fused and fixed, the bottom 3 of the bag body can be formed into a square bottom shape.

According to the present invention, the opening film 13 and the hand-held film 4 opposed to the opening film 13 are provided at the four hand-bonded fusion wires 5 extending downward on the left, right, front and back of the opening film 13 in FIG. Are fused and fixed. The angle of the hand-held fusion line 5 is approximately 45 degrees. According to the weight of the bag body portion, the length of the hand-held fusion wire 5 can be increased as necessary. For that purpose, it is necessary to increase the vertical width of the handhold film 4. The handbag of the present invention is characterized in that, as shown in FIGS. 1 and 5, the upper end of the handheld fusion line 5 is curved in the vertical direction. When hanging the handbag of the present invention, the handbag film is turned upside down and folded back at the handbag fusion line 5, and the folded portion at the handbag fusion line 5 supports the total weight of the bag. In this case, when the upper part of the hand fusion splice line 5 is not curved in the vertical direction, when force concentrates on the tip of the hand fusion splice line 5 inclined at 45 degrees, the shape becomes as shown in FIG. A very large force will be concentrated at one point P of the tip of the hand fusion line, and this fusion portion will be broken from the tip. In the present invention, this portion is curved as shown in FIGS. 1 and 5 to disperse and support the force, so that the upper end of the hand fusion splice wire is not damaged.

The curved portion A of the hand-held fusion line of the hand-bonded fusion wire 5 of the bag of the present embodiment can be bent in the horizontal direction if desired. As a result, the force concentrated on the tip of the hand-held fusion line is distributed on the line of the hand-held fusion line tip curved portion A which is bent in the horizontal direction, so that the lower end of the hand-held film is not damaged, which is more desirable. The bending portion A of the hand fusion splice line 5 of the hand fusion splice wire 5 of the present embodiment can be bent in the horizontal direction and then further raised upward. Furthermore, the hand-held fusion line 5 of this embodiment starts from the upper edge 17 of the opening, but if it is provided inside the center of the bag from the lower end of the lower square-bottom fusion line 18, when the bag body is suspended, As shown in FIG. 4, the handheld film 4 has a shape extending from the left and right ends of the longer side of the vertically long bag body opening, and when hung in the form of FIG. It is located just above the side opening film 13 of the bag portion, and the edges of the left and right opening films 13 are suspended just above. At this time, the hand-held film is in a state of being bent, and there is a possibility that gravity may be added to the hand-held fusion line.

Further, in the case of the embodiment bag as shown in FIG. 5, a hand fusion splice is performed on an intersection 11 between the lower corner and the lower corner, which is the intersection of the lower corner fusion line 18 and the lower edge. The line upper end curved portion 12 is just located. In this way, as shown in FIG. 6, when the bag body is suspended in a rectangular parallelepiped shape, the two hand-held films 4 extend from the short side of the upper edge of the rectangular opening film. As shown in FIG. 6, it is attached so as to cross right above the bag body in parallel in the vertical direction. FIG.
In the case where the hand-held film 4 is attached as in the case of (1), the weight of the film is heavy because the surfaces of the two hand-held films 4 are horizontal as shown in FIG. Desirable in cases. By providing the upper end of the hand-held fusion line almost directly above or outside the lower end of the square-bottom fusion line, the hand-held film can be extended from the short side of the upper edge opening edge.

Therefore, it is convenient to store the hanging bag of the form shown in FIG. 6 in the form of a box or to stack and store fixed-shaped bags such as old newspapers and old magazines. Also in this case, as shown in FIG. 5, the upper end of the hand fusion splicing wire 5 is curved in the vertical direction. Due to this curvature, the hand-held film is not damaged even when supporting heavy contents. The production method of the present invention will be described in detail by taking the production of a handbag of an example as an example. First, while continuously pulling out a long tube-shaped film raw material, it is fed into a known gusset folding step, and the gusset fold is provided at the upper and lower portions of the bag as shown in FIG. As shown in FIG. 3, an M-shaped gusset fold is formed in the opening and a W-shaped gusset is formed in the bottom at the bottom.

Next, the gusset is sent to a cutting step, and the upper inner gusset fold 8 at the center of the upper edge M-shaped gusset fold is continuously cut by a knife. Next, a metal backing plate is inserted between the upper and lower gusset folds, and a heat trowel is applied to the front and back surfaces of the plate to separately apply the gusset-folded film pair on the front and back sides as shown in FIG. 1 or FIG. A fusion line and a square bottom fusion line are formed by heat fusion. In these fusion steps, it is convenient to simultaneously carry out the construction of the hand fusion line and the square bottom fusion line of the next bag on the boundary line with the next bag. For example, B of the right bottom fusion line 18 and B of the left bottom fusion line 1 in FIG.
8B is pressed against a backing plate with a trapezoidal hot blade connected to form a trapezoidal fusion line, and then the center is cut off to form a side edge as shown in FIG. When formed, a fusion line that rises toward the side edge can be obtained.

In this case, a hand-held fusion wire 5 of the present invention is formed by pressing a hot blade whose upper end portion conforms to a vertically curved shape. If the shape of the hot blade is selected, the lower end of the hand-held fusion line can be curved in the horizontal direction as desired, and the strength of the hand-held portion can be further improved. Since the tip of the square bottom fusion line is continuous with the next bag, use a convex continuous one so that the hot blade is applied at the same time as the fusion of the next bag. It is desirable to separate them. Normally, in the present invention, it is desirable to use such a hot blade whose convex tip is curved in a round shape and whose side edge is curved substantially horizontally. When the upper end is a straight line with a 45 ° inclination angle, such as a square bottom fusion line by a conventionally known method, a fusion line intersects at 45 ° with the fusing side edge. The weight of the corner bottom is concentrated on this tip, and the bag is easily broken.

As shown in FIG. 1 and FIG. 5, when the corner bottom fusion line 18 intersects the side edge fusion part 6 at an almost perpendicular angle,
The above-mentioned concentration of gravity is eliminated, and the shape of the square bottom fusion lines of the left and right bags is the same even if the fusion line to come on the boundary line is slightly shifted when the side edge is melted in the bag making process. This is desirable because even if there is some error in the fusing position, the strength does not decrease and the product yield does not decrease. Following such a fusion step, the two upper edge gusset folds 9 are cut along the upper edge a few mm below the fold edge. At this time, the separated film pieces are connected continuously,
The operation of removing this can be performed simply by winding the film piece.

In the manufacturing method of the present invention, it is particularly necessary to cut off the upper edge fold after the hand-welding step.
If the cutting process of the upper edge fold is performed before the hand-welding process, when the hand-welding line is constructed, the hand-held film is unstably released from the position of the opening film, so a certain stable shape It is difficult to create a hand-welded portion. In addition, the presence of a hand fusion line makes it impossible to cut and open both upper edge gusset folds 9 with a knife after the hand fusion step. By cutting off the upper edge, the two upper edge gusset folds 9 can be cut at the same time, and the handhold film can be separated from the opening film 13 after the hand fusion line 5 is formed completely accurately.
The handle can be finished to the correct shape as designed. In addition, the cutting process of the upper edge fold is not a continuous process as described above, but a large number of handbags are stacked and fixed in units of 200 sheets, for example, after the side edge cutting process, and this is cut up by a cutting machine. It can also be performed in the step of cutting off the edge fold. In any of the embodiments, the production method of the present invention makes it easy to remove film scraps. As described above, the long raw film having the square bottom fusion line 18 and the hand-weld fusion line 5 cut off and the upper edge cut off is then applied to each bag by applying a hot blade to each bag width. It is possible to obtain a handbag in a state in which the body film is cut off and the handheld film tape is folded inside the opening as shown in FIG. 1 or FIG.

[0016]

According to the present invention, it is possible to efficiently and easily manufacture a plastic handbag that is convenient and strong in use, and it is generated when a handbag film is separated by a conventional manufacturing method. Since no film fragments are generated, the manufacturing process is facilitated, and the strength of the hand-carrying portion is increased.For example, even when the bag portion is full of newspapers when used for storage of old newspapers, etc. Since the strength of the upper part of the fusion line of the hand strap is large, even if a large number of newspapers are stacked and hung in a state of full bag, the hand strap will not be damaged.

[Brief description of the drawings]

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

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

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

FIG. 4 is a perspective view showing a shape of the handbag according to the embodiment of the present invention when 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 of the embodiment of FIG. 5 when used.

FIG. 7 is an enlarged view of an upper end portion of a conventional hand-held fusion splicing wire.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 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 inside gusset fold 9 Top edge gusset fold 10 Bottom gusset fold 11 Square bottom fusion line Intersection with the lower edge 12 Curved upper end of fusion line 13 Opening film 15 Bottom inner film 16 Bottom outer film 17 Opening upper edge 18 Square bottom fusion line A Hand fusion line tip curved portion B Square bottom fusion line curve Department

Claims (5)

(57) [Claims] 1. A method for producing a handbag by continuously processing a long tube-shaped thermoplastic film and finally fusing the side edges for each width of each bag body. So,
First, the raw material is continuously sent to the gusset folding process,
At the top corresponding to the opening of the handbag, an M-shaped gusset fold is provided with two folds at the upper edge and one fold inside the center. The upper edge M-shaped gusset fold is cut and separated along the central inner crease, and then the raw material separated from the upper edge M-shaped gusset fold is fed to a gusset fusion step, in which the fusion step is performed. When a patch plate is inserted between the upper edge folds and a bag is formed, hot blades are provided at both upper and lower upper corners of the upper edge fold at intervals corresponding to the width of the bag body. by pressing the backing plate in the inclination of approximately 45 degrees down from the upper edge downwardly to the right and left side edges direction when it becomes bag
A four handbag melting wire hatched-like, each tote
The upper end of the part fusion line curves vertically to the upper edge ,
A film extending linearly to near the upper edge is provided, and the two films forming the two upper edge folds are fused and fixed at four places by the hand-held fusion line, and then fused. The fixed web is sent to the upper edge cutting step and the side edge melting step, and the upper film is cut along the upper edge fold to remove the two upper edge folds and open the handheld film. A method for manufacturing a handbag, wherein the bag is separated from an edge and cut along a line corresponding to a side edge for each width of the bag body . 2. A method of manufacturing a handbag by continuously processing a long tube-shaped thermoplastic film and finally fusing the side edges at each width of each bag. So,
First, the raw material is continuously sent to the gusset folding process,
A gusset fold with two folds at the upper edge and one fold at the center is provided in the upper part corresponding to the opening of the handbag, and at the same time, a W-shape is formed at the lower part corresponding to the bottom of the handbag. A gusset folded portion having two folds at the lower edge and one fold at the center inside is provided, and then the gusset-folded raw material is sent to the cutting process, and the central inner fold of the upper edge M-shaped gusset fold is provided. The raw material separated by cutting along the upper edge and then separating the upper edge M-shaped gusset fold is sent to a gusset fusion step, in which the upper edge is separated between the folded folds and two lower edges. When the backing plate is inserted between the W-shaped gusset folds, and in the part corresponding to the upper left and right upper corners in the case of a bag, from the front and back sides of the upper edge fold, at intervals of the width of the bag body Press the hot blade against the inner contact plate to remove Substantially descending downward in the left and right side edges directions from
Hatched shape 45 degree slope a four handbag melting wire, its
The upper end of each hand-joint fusion line is curved perpendicular to the upper edge and extends straight near the upper edge
The two films forming the two upper edge folds are fused and fixed at four places by the hand-held fusion line, and simultaneously with or before and after this upper fusion step, the lower edge fold is formed. By pressing the hot blade against the backing plate from both the front and back sides, four slanted square bases that rise upward from the lower edge to the left and right side edges of the bag when the bag is formed at intervals of the width of the bag A fusion line is provided, and two films forming two lower edge folds are fusion-fixed to each other at four places by the respective bottom fusion lines, and then,
The fusion-fixed raw material is sent to the upper edge cutting step and the side edge cutting step, and cut along the upper edge fold under the fold to remove two upper edge folds and open the handheld film. A method for manufacturing a handbag, wherein the bag is separated from an edge and cut on a line corresponding to a side edge for each width of the bag body . 3. The method for manufacturing a handbag according to claim 2, wherein an upper end portion of the corner bottom fusion line is curved horizontally toward the side edge of the bag body. 4. A bag formed by fusing a film in which a continuous plastic film at the bottom is half-folded and an opening is provided at an upper portion, and the left and right side edges are fused. A hand tape is provided inside or outside the opening film, respectively, and the hand tape and the opening film are fused and fixed by a side edge and a hand fusion line. It is provided obliquely at an inclination of about 45 degrees from the upper edge of the opening toward the side edge of the bag body, and the upper end of the fusion splicing line is curved vertically toward the upper edge of the opening, and the bottom is a square bottom. A handbag having a structure, wherein an upper end portion of a hand-held fusion line is provided substantially outside a lower end portion of the fusion line for the square bottom structure. 5. The handbag according to claim 4, wherein the upper end of the fusion line for the square bottom structure is curved in the horizontal direction.