JP4473368B2 - Handbag manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a handbag including a step of punching a film fold. More specifically, the present invention relates to a method for manufacturing a handbag having a long punching blade and a simple manufacturing process with little noise.
[0002]
[Prior art]
Conventionally, when a handbag is manufactured using a thermoplastic resin film as a material, a method of punching a double film on a punching table after a long resin film is gusset-folded is commonly used. The handbag portion of most handbags is formed by a punching process of two or more laminated films.
In the bag-making process using resin film, initially, the punching process of two or more laminated films employs a method in which the laminated film placed on the punching table is mechanically punched down by a blade mold. It was. However, this method has a large impact sound when the metal blade mold collides with the table, the working environment is bad, and the sharpness of the blade of the blade mold is reduced in a short time, and it depends on the loss time required for replacing the blade mold. Workability also decreases.
In order to prevent the noise of this initial punching method, a method of heating a blade die having a relatively blunt cutting edge and fusing with heat has come to be commonly used.
However, when punching one film by fusing, there will be no trouble. However, if two or more laminated films are punched with a heating blade, the laminated films will be punched, but the upper and lower laminated films will be Weld.
Conventionally, when a laminated film is punched out by fusing, an anti-fusing agent is applied in advance to the fused portion of the laminated film, and fusing is performed by a method for preventing complete fusion.
In this case, there is a drawback in that the troublesome process of applying a partial specific anti-fusing agent increases and the bag making process is complicated. That is, if the anti-fusing agent is applied over the entire surface, it is impossible to weld the side edges of the bag body in the fusing process at the final stage of the bag making process.
[0003]
[Problems to be solved by the invention]
The present invention does not generate noise in the punching process, has good durability of the punching blade, does not decrease the production efficiency due to the replacement of the blade mold, and fuses specific parts as in the case of punching by fusing An object of the present invention is to provide a handbag manufacturing method that does not require a coating step of an inhibitor.
[0004]
[Means for Solving the Problems]
The present inventor considers that a punching method in which the blade edge of the punching blade does not collide is necessary in order to solve the noise of the above-described problem, and that two or more laminated films on the slit have a thin blade mold in the slit. Inspired by a structure that cuts the film in the middle of insertion. However, when a laminated film is cut with a normal blade type by this method, the film escapes from the position of the punching blade and cannot be cut at an accurate position.
Therefore, when the shape of the punching blade is viewed from the side, it is found that if the corrugated shape is used, the film at the cutting location does not escape from the blade edge, and the laminated film can be accurately cut into the shape of the punching blade. Based on this, the present invention has been completed.
That is, the present invention comprises the inventions of the following items.
(1) While continuously feeding out a long thermoplastic resin film band, a gusset process for continuously forming a predetermined cased folded laminated structure corresponding to the structure of the bag is performed on the film band, and then a damper roll is Then, the continuous movement of the film band is converted into one-pitch movement corresponding to the width of the bag body, and as one of the bag making processes, the one-pitch movement is sent to the punching table and stopped at a predetermined position. , Through a punching process in which a predetermined portion of the laminated structure is punched with a punching blade of a predetermined shape while stopping on the punching table, and finally sent to the fusing table with a one-pitch movement and stopped at a predetermined position, In the manufacturing method in which the gusset fold laminated structure is melted for each width of the bag body while stopping on the fusing table to form the bag body side edge fused portion, and the handbag is sequentially separated from the end of the film band. Shape Striking side shape of the blade portion of the blades are corrugated, manufacturing method of tote bag, characterized in that holes corresponding to the position and shape of the punching blades in the punching 抜台 surface is provided.
(2) The method for producing a handbag according to item 1, wherein the apex of the corrugated side shape of the blade portion of the punching blade is substantially triangular.
(3) In the case where the punching blade is composed of a straight portion and a curved portion, the pitch interval between the ridges of the corrugated blade in the curved portion of the punching blade is 10 of the pitch interval between the vertices of the corrugated blade in the straight portion of the punching blade. The method for producing a handbag according to item 1 or 2, characterized in that it is -50%.
(4) The 1st term, the 2nd term, or the 3rd term, wherein the corrugation of the side surface shape of the blade portion of the punching blade has a portion in which corrugations having different heights are alternately arranged. A method for producing the handbag according to the item.
(5) The handbag manufacturing method according to the first, second, third, or fourth aspect, wherein the punching step using the punching blade is a step using a punching blade having a cutting edge on the entire circumference .
(6) The first, second, third, or fourth aspect, wherein the punching step with the punching blade is a step of using a punching blade provided with a corrugated cutting edge on the periphery of the lower half. Method for handbags.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In this description, the film refers to a thermoplastic resin film.
First, the present invention will be described with respect to a method for manufacturing the handbag of the perspective view of FIG.
In the handbag shown in FIG. 1, a single bag film 1 is continuously formed on the front surface and the back surface of the bag body via the bottom structure of the bottom 3, and the front and back films are melted on the left and right side edges. The bag body portion of the handbag shown in FIG. 1 is formed by being fused and fixed at the attachment portions 6 and 6 and having an opening at the top. Two handed film films 4 and 4 are provided on both side edges of the opening of the handbag, and each handheld film 4 is fixed to the opening edge of the bag body by left and right handbag fixing parts 5 and 5. ing. As shown in FIG. 1, the left and right handed portion films 4 and 4 can be pulled out from the inside of the opening edge, grasped with fingers, and the handbag can be suspended as shown in FIG.
The handbag shown in FIG. 1 is manufactured by a known bag-making method from a long tubular film that is gusset-folded into the cross-sectional structure shown in FIG. 2, and in this manufacturing method, the plan view and FIG. 4 is manufactured in the folded state shown by the laminated structure in the sectional view of FIG. The handbag shown in FIG. 3 has a handpiece film 4 (between the handpiece fixing portions 5 and 5 at the opening edge shown in FIG. 3) separated from the opening edge by a punching portion 17 formed by punching the gusset fold shown in FIG. As shown in FIG. 4, it is built inside the opening edge.
[0006]
In the manufacturing process of the handbag shown in FIG. 3, gusset folds are formed on the upper and lower sides of the long tubular film while the long tubular film is continuously sent to the gusset folding process. A gusset fold is formed in an M-shape to form a long tubular film band having the cross-sectional structure of FIG. Then, a fixed knife is applied to the position of the fold E in FIG. 2 in the flow of the film band to separate the fold E into the cross-sectional structure in FIG. The separation operation of the crease E with the fixed knife can also be performed in the following one-pitch movement process.
Next, the film band having the cross-sectional structure shown in FIG. 4 is converted into a one-pitch movement that is intermittently moved by the width of the bag by a conventional damper roll, and the bottom heat sealing step and the hand portion heat sealing shown in FIG. By sending out to the process and forming the corner bottom fusion portion 18 for the bottom corner and the hand fixing portion 5 for the hand fixing portion, the laminated structure of the laminated structure of the film band is fused to fix the laminated structure. . In the bottom heat seal process and the hand heat seal process, a plate is inserted between the front and back folds by a conventional method, and a linear hot plate inclined from above and below is applied to the plate. And heat seal each.
Next, the film band is also sent to the punching table by one-pitch movement, and at the moment when the film band is stopped on the punching table, the punching blade is dropped synchronously, and the upper edge of the film band is punched and punched. A cutout 17 is formed.
Finally, the film belt is sent to the fusing table by one pitch movement, and the handbags are cut and separated one by one while forming the bag body side edge fused portion 6 by the heated fusing blade that descends.
[0007]
The handbag manufacturing method described here is a typical method for manufacturing the handbag shown in FIG. In this manufacturing method, the punching process for forming the punching portion 17 is performed by using the four laminated films at the upper edge of the laminated structure in FIG. This is done by punching at once with the falling blade. The reason for performing this punching step is that the film on the inner surface of the opening edge is separated from the opening edge by punching the crease G of the opening edge in FIG. This is because the hand film 4 is formed between them.
Conventionally, in this punching process, a metal punching blade having the shape of the punching portion 17 is hit against a laminated film on a flat punching table and punched. In this case, noise pollution was severe.
Moreover, if it is going to perform the punching by the fusion | melting which presses the hot blade currently used regularly at a bag making process instead of such a mechanical cutting, four films will fuse | fuse at a cutting location. Even if this fusion is to be avoided by applying a conventional anti-fusing agent, it is impossible to apply the anti-fusing agent only to the inside of the gusset fold G in FIG.
The manufacturing method of the present invention is characterized in that a blade having a corrugated side shape is used as a blade for punching and that the blade tip does not contact the punching table because there is a hole in the punching table.
As the punching blade according to the present invention, for example, as shown in FIG.
This punching blade includes a base portion S and a blade portion R, and the blade portion is bladed from a triangular tip to a recess. The distance between the apexes of the corrugation of the punching blade of the present invention can be appropriately selected between 2 and 20 mm, preferably 4 to 10 mm. If this interval is too narrow, the relief of the film surface at the moment of cutting becomes large, and if it is too wide, the shape of the punched portion becomes uneven.
[0008]
As the punching blade of the present invention, as shown in FIGS. 6b and 6c, other shapes can be used.
The punching blade that forms the punching portion 17 of FIG. 3 can have a planar shape that is half of an elliptical shape, as in the planar shape of FIG. 7a. However, from the viewpoint of the strength and shape stability of the punching blade, the punching portion 17 is formed by a triangular corrugated cutting edge provided on the periphery of the lower half as the elliptical punching blade of FIG. Is desirable. The shape of the punching blade of the present invention is appropriately selected according to the punching shape.
This punching blade is formed by bending a thin sheet metal having a thickness of 1 mm or less into an elliptical shape, and mechanically grinding the lower edge produced by welding both ends, for example, a triangular shape as shown in FIG. Can be made into a continuous blade shape. This elliptical blade shape can be used by being fixed to the base plate of the punching blade with screws. As another method, a groove can be provided in a metal flat plate, and the groove can be formed by continuously embedding the corrugated blade with the cutting edge facing upward.
The punching blade of the present invention does not collide with the punching table but only contacts a soft film, and does not require any special impact strength. For this reason, steel used for a normal punching blade may be used as the cutting edge, but it can be manufactured with a tin plate that can be easily processed. In some cases, a hard resin molded product can be used for the punching blade of the present invention.
In the case of a conventional horizontal blade type punching blade, the straight blade part hits the surface of the film evenly, the edge of the cutting edge against the film is weak at the time of cutting, and the film escapes from the edge of the film. Unable to start disconnecting from
On the other hand, the punching blade of the present invention has a corrugated shape, in particular, a triangular shape, and when the apex is sharp, the apex of the blade mold strongly hits the film surface, so that the film surface can escape from the cutting edge. The film starts to be cut at the position where the top of the blade hits. When the punching blade is further lowered, the film is instantaneously and smoothly cut into a punching blade shape at the blade portion inclined from the apex.
[0009]
The punching process by the punching blade of the present invention is performed on the hole thus opened in the punching table. Therefore, the punching blade is merely inserted into the hole provided in the punching table and does not directly collide with the punching table, so that almost no noise is generated. The shape of the peripheral edge of the hole provided in the punching table is preferably formed in accordance with the shape of the outer edge of the punching blade.
It is desirable that the shape of the peripheral edge of the hole in the punching table is closer to the shape of the punching blade because the film surface does not escape when the cutting edge contacts.
Therefore, the narrower the gap between the shape of the peripheral edge of the hole and the outer edge of the punching blade, the better, and it is desirable to make it as narrow as possible according to the accuracy of the drop position of the punching blade. This interval can usually be about 0.1 to 2 mm.
Furthermore, in order to eliminate the escape of the film surface when the cutting edge hits, it is desirable to form the hole into a groove shape having a width that just fits the width of the punching blade. In this case, the groove shape and the punching blade shape are substantially the same. In addition, when compressed air is introduced into the hole of the punching table and the inside of the hole is slightly pressurized during the punching operation, the central part of the punching film is lifted by air pressure. In this case, the escape of the film is eliminated, and the scraped waste film can be recovered by the compressed air flow through the inside of the punching blade.
When the hole of the punching table is formed into a groove shape, it is complete in terms of preventing escape of the film surface, but it may be difficult to remove the punched film dust. When the hole of the punching table is formed in a groove shape, it is desirable to remove the film scraps by suction with compressed air or blowing away with compressed air. Even in the case of a groove shape, the compressed air can be introduced into the groove and used for film debris removal.
The depth of the hole (including the groove) of the punching table in the manufacturing method of the present invention needs to be set to a depth at which the tip of the punching blade does not collide. Therefore, the depth can be set to 2 to 3 mm or more than the height of the corrugated cutting edge of the punching blade. Thus, since the tip of the punching blade does not collide with anything other than the film, there is an advantage that not only there is no noise but also the durability of the punching blade is increased.
[0010]
If the hole of the punching base is a through hole, the punched film waste can be conveniently dropped from the inside of the punching blade to the lower side of the punching base from the inside of the punching blade.
The manufacturing method of the present invention can be similarly applied to the planar handbag shown in FIG. 8, which is the simplest handbag. This handbag is formed by fixing a bag body film 1 which is continuous on the front and back sides with left and right side edge fused portions 6 to form a bag body. A hand film 4 is provided.
In the case of this handbag, a corrugated punching blade similar to the above can be used in the punching process of the inner edge L of the handpiece film and the outer edge L of the handbag.
Next, the manufacturing method of the present invention in the case of the handbag shown in FIG. 9 will be described.
This bag differs from the handbag of FIG. 1 only in that the handbag film 4 is outside the opening edge of the bag body.
The handbag on the outside is convenient from the viewpoint of use, but the gusset folding process for making the laminated structure of the film band into the laminated structure of FIG. 10 is difficult and practical application is difficult.
In this bag manufacturing method, a long tubular film developed by the present inventor can be formed into a gusset fold having a sectional structure as shown in FIG. it can. By using the air pressure and the box-type gusset folding path, it is possible to continuously form a wide variety of gusset folding laminated film bands.
Now, after the tubular film is continuously made into a gusset-folded film band having the cross-sectional structure of FIG. 11 by the box-type gusset folding method, the movement of the film band is converted into one-pitch movement by a damper roll, and the punching table On the upper elliptical hole, the central portion of FIG. 11 can be punched with an elliptical punching blade having a corrugated cutting edge on the entire circumference of the present invention. At this time, the four folds 9 at the top, bottom, left and right are simultaneously cut, and the four folds are punched out. After that, the film strip is cut to the left and right on the center line 14, and the plate is inserted between the upper film 12, 13 and the lower film 12, 13 of the left and right film strips, and at the moment on the plate. The hot blade is pressed from above and below to heat-seal the hand fixing part, and then the side edge of the bag body of the two rows of film belts is melted in the fusing process to obtain the handbag of FIG.
Alternatively, the film band of FIG. 11 is cut along the center line, the film band having the cross-sectional structure of FIG. 10 is separated into two rows, and the handbag of FIG. 1 is manufactured for each film band. The handbag bag of FIG. 9 can be manufactured by performing the same hand punching process and heat sealing process of the hand fixing section.
[0011]
Next, the manufacture of the handbag for a board shown in the plan view of FIG. 12 will be described.
The plate-like handbag can grasp the structure of the plate-like bag from the planar structure of FIG. 12 and the cross-sectional structure of FIG.
The bottom film 21 of the bag body is continuously bent to the left and right top film 23 via the left and right side gussets 22. Both ends of the laminate are welded by the upper and lower peripheral edge welded portions 26 to form a disk-shaped bag body portion. An opening 28 is formed in a slit shape at the center of the left and right upper surface films 23, and a handpiece film 24 that is folded twice from the upper surface film 23 is laminated on the left and right opening edges of the opening. The three layers are welded and fixed at four inclined hand-holding fixing portions 25, and hand punching portions 27 are respectively provided in the middle of the hand-holding fixing portions 25 at the left and right opening edges. By this hand punching portion, the hand portion film 24 is separated from the opening edge of the upper surface film, and a finger can be put in between and suspended.
Further, a semicircular peripheral punching hole 20 is punched at a position where the upper and lower welding edges intersect with the left and right opening edges. When the hole is stored in the bag body, the hole can greatly open the opening, whereby the disk-shaped object substantially matching the size of the bag body can be stored.
In order to manufacture such a handbag for a plate-shaped object of FIG. 12, first, a long tubular film is continuously sent to the casetting process, and the cross-sectional structure corresponds to the handbag for the disk-shaped object of FIG. A film band having the same laminated structure as that in which the left and right hand portion film is continuous is formed.
After the movement of the film band of this laminated structure is converted into one-pitch movement via a damper roll, the film band is fed onto the peripheral punching table, and the peripheral punching hole 20 is punched out with a circular corrugated punching blade on the base. Next, a knife is placed between the left and right handed portion film 24, and the center line of the upper surface of the film band is moved for each pitch when moving by one pitch with a fixed knife with the blade tip facing upward between the left and right handed portion film. Disconnect. Next, the upper surface of the film band is opened from this cutting line, and the film band is sent out so as to wrap the hand heat-seal base inside the film band. That is, with the one-pitch movement, the bottom film 21 enters the lower surface of the heat seal table, and slides so that the upper surface film 23 of the bag body contacts the upper surface of the heat seal table. At this time, the heat seal base is fixed in a suspended state by two support columns provided before and after the punching position of the base. The two struts extend upward from the open slit at the center of the film band, and the struts are fixed to an external frame base.
[0012]
In synchronism with the moment of stopping for each one-pitch movement, a linear hot plate descends from above to the opening edge on the top surface film of the bag body, and the hot bath is pressed onto the heat sealing table to fix by hand. A portion 25 is formed.
Next, similarly, one-pitch movement is further sent to the hand-feeding part punching table, and the hand-punching part is punched with the punching blade having the corrugated cutting edge of the present invention at the left and right opening edges.
In the punching process of the hand punching part, it is necessary to punch only the hand part without punching the bottom film. For this reason, it is necessary to interpose a punching table between the bottom film and the top film as in the case of the manual welding process.
As a punching base when a punching base is interposed between the upper and lower films, for example, a hand punching base shown in FIG. 14 can be used. For example, the gusset-folded film band of FIG. 13 is fed onto the punching base 39 by one pitch movement from the left of the punching base of FIG.
For reference, a fixed knife 38 for cutting on the center line is shown at the left end. In the handbag shown in FIG. 12, the cutting with the fixed knife needs to be performed before the heat sealing of the handbag fixing portion 25 and the peripheral punching hole. In the case of this handbag, there is no particular restriction on the order of the hand punching process, the heat sealing process of the hand fixing part, and the peripheral punching process, but when the hand punching process is the first, Thus, it is convenient to provide a hole at the end of the hand punching table and install a fixed knife in this hole. By this method, only the top film can be safely cut.
The film band is fed into the punching process so as to wrap the punching table 30 into the film band from the slit between the opening edges separated by the center, inside the film band cut at the center line. The stage 30 is stopped in a state where it is housed inside. At this time, the upper surface film 23 of the film band is disposed in contact with the upper surface of the punching table 30, and the bottom film 21 of the film band is slid into the gap between the lower surface of the punching table 30 and the punching base 39. Can be made.
[0013]
The punching table 30 is supported by being suspended by two columns 31 and 32 extending from a frame table 33 fixed to the outside.
The film band is moved by one pitch to the punching table 30 suspended and fixed in this manner, and the film band stops at a predetermined position on the punching table in a state of wrapping the punching table 30 as described above. In synchronism with the moment of stopping, the opening edge can be punched into an elliptical shape across the left and right opening edges with the same elliptical punching blade 34 as the central elliptical punching hole in FIG. The punching blade 34 is provided with a triangular blade shape.
The punching blade 34 is fixed to a mounting plate 36. The mounting plate 36 is moved up and down by an air piston 37, and when the piston is lowered, the punching blade 34 is punched into the hole groove 35 provided in the punching table 30. The blade is inserted. By this operation, only the upper surface film of the film band is smoothly cut. At that time, the lowest position of the piston motion is set at a position where the tip of the punching blade 34 does not contact the bottom of the hole groove of the punching table 30.
In this case, since the film waste cannot be dropped from the punching blade to the opposite side, it is desirable that the hole corresponding to the elliptical punching blade is an elliptical groove because an accurate shape can be obtained.
After the punching step, the handbag shown in FIG. 12 can be manufactured by fusing the periphery in the fusing step.
[0014]
【The invention's effect】
In the manufacturing method of the present invention, the combination of the corrugated punching blade and the hole provided in the punching table can easily prevent noise in the punching process for forming the handbag portion of the handbag and improve the durability of the punching blade. The effect that can be done was obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view of one handbag to which the production method of the present invention is applied.
2 is a cross-sectional view showing a gusset folding structure of a material film of the handbag shown in FIG. 1. FIG.
FIG. 3 is a plan view of the handbag shown in FIG. 1;
4 is a cross-sectional view taken along the position of the arrow in FIG. 3;
FIG. 5 is an explanatory diagram of a manufacturing process of the handbag of FIG. 1;
FIG. 6 is a partial side view showing a side shape of a punching blade used in the present invention.
FIG. 7 is a plan view of a punching blade to which the manufacturing method of the present invention is applied.
FIG. 8 is a plan view of another example of a handbag to which the present invention is applied.
FIG. 9 is a plan view of another example of a handbag to which the present invention is applied.
FIG. 10 is a cross-sectional view of the handbag shown in FIG. 9 cut at the position of the arrow.
11 is a cross-sectional view showing a gusset structure of a film band used in the method for manufacturing the handbag shown in FIG. 9. FIG.
FIG. 12 is a plan view of a board-like handbag according to another example of the handbag to which the present invention is applied.
13 is a cross-sectional view of the handbag shown in FIG. 12 taken along the arrow.
14 is a longitudinal sectional view for explaining a punching process used in the method for manufacturing the handbag shown in FIG. 12. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bag body film 2 Opening part 3 Bottom part 4 Hand part film 5 Hand part fixing part 6 Side edge fusion | fusion part 7 Bottom part gusset crease 8 Fold 9 Fold 11 Hand part film 17 Punching part 18 Square bottom fusion part 20 Perimeter Punching hole 21 Bottom film 22 Side gusset 23 Upper surface film 24 Hand part film 25 Hand part fixing part 26 Peripheral weld part 27 Hand part punching part 28 Opening part 30 Punching base 31, 32 Post 33 Frame base 34 Punching blade 35 Hole groove 36 Mounting plate 37 Air piston 38 Fixed knife 39 Punch base

Claims (6)

  While continuously feeding out a long thermoplastic resin film band, a gusset process is performed in which a predetermined cased folded laminated structure corresponding to the structure of the bag is continuously formed on the film band, and then via a damper roll. Then, the continuous movement of the film band is converted to one pitch movement corresponding to the width of the bag body, and as one of the bag making processes, the film is sent to the punching table by the one pitch movement and stopped at a predetermined position. Through a punching process in which a predetermined part of the laminated structure is punched by a punching blade having a predetermined shape while stopped on the punching table, and finally, it is sent to the cutting table by one pitch movement and stopped at a predetermined position. In the manufacturing method in which the gusset fold laminated structure is melted for each width of the bag body to form a bag body side edge fused portion and the handbag is sequentially separated from the end portion of the film belt while the upper is stopped. Punching The side shape of the blade portion is a corrugated, manufacturing method of tote bag, characterized in that holes corresponding to the position and shape of the punching blades in the punching 抜台 surface is provided.   2. The method for manufacturing a handbag according to claim 1, wherein the apex of the corrugated shape of the side surface of the blade portion of the punching blade is substantially triangular.   When the punching blade is composed of a straight portion and a curved portion, the pitch interval of the corrugated blade at the curved portion of the punching blade is 10 to 50% of the pitch interval of the corrugated blade at the straight portion of the punching blade. The method for producing a handbag according to claim 1 or 2, wherein:   4. The handbag according to claim 1, wherein the corrugation of the side surface shape of the blade portion of the punching blade has portions in which corrugations having different heights are alternately arranged. Method. The method for manufacturing a handbag according to claim 1, 2, 3, or 4 , wherein the punching step by the punching blade is a step of using a punching blade having a cutting edge on the entire circumference . 5. The method for manufacturing a handbag according to claim 1, wherein the punching step with the punching blade is a step of using a punching blade having a corrugated cutting edge provided at the periphery of the lower half.

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