JP2001071398A - Bag body made of thermoplastic synthetic resin of nonwoven net fabric or woven net fabric having header, bag making method, and bag making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag making method capable of making a large number of bags at once by one bag making machine, capable of making the bag making machine compact and continuously making many bags by as small a number as possible of processes, a bag making machine and a bag body. SOLUTION: A long cylindrical tube body of a stretchable net is delivered longitudinally in a flat state and cut open at its central part in its width direction and a header 5 is partially overlapped with the cut open side of this long net sheet 1 of a semi-folded state to be welded thereto and the net sheet 1 is welded in its width direction to be cut.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag made of a thermoplastic synthetic resin of a nonwoven or woven mesh having a header, a method of making the bag, and a bag making machine. More specifically, the present invention relates to a bag using a long tubular tube of a stretchable net made of a thermoplastic synthetic resin made of a nonwoven or woven mesh, a bag making method thereof, and a bag making machine.

[0002]

2. Description of the Related Art Conventionally, as a bag making method, a long tubular tube of a stretchable net made of a thermoplastic synthetic resin of a nonwoven or woven mesh is cut into a tubular shape having a predetermined length. The tubular tube body of the elastic net is flattened, and the bent portion formed by a part of the peripheral surface is used as a side portion, one of the other openings is welded and closed, and one of the openings is closed. To form a bag. In this case, after inserting the contents through the opening, for example, a header made of paper or the like is bent, the opening is sandwiched and closed with a stapler or the like. Or after flattening the long cylindrical tube body of the elastic net of the thermoplastic synthetic resin of the non-woven net or the woven net, and cutting one or both sides thereof to form one or two so-called long net sheets A synthetic resin header is welded to one side constituting the opening, a net sheet having the header is overlapped, the bottom side and both sides are welded, and then cut at both sides to form a bag body. there were.

[0003] Alternatively, a long tubular tube body made of a thermoplastic synthetic resin made of non-woven or woven mesh is flattened, one side thereof is cut open, and this side is opened and folded to form a half-folded net sheet. Was formed, and the front and back net sheet portions were thermally cut in the width direction of the half-folded net sheet at predetermined intervals in the longitudinal direction of the half-folded net sheet to form a bag. Therefore, some kind of closing means is required separately. As described above, only a bag making machine that embodies the above method is used for bag making.

[0004]

In this case, first, the conventional long tubular tube of the elastic net is cut into a predetermined length of tube, and the predetermined length of the tube is flattened. In the case where a bent portion formed by a part of the peripheral surface is used as a side portion and one of the other openings is welded and closed to form a bag having another one opening, this opening is used. Even if an attempt is made to weld a header in which a product name for closing the part is described, the header is already in a tubular form, the welding is troublesome, and it is difficult to weld the header in a continuous process.

For this reason, it is necessary to use a paper header and close it with a stapler or the like in order to close the mouth of the opening, which is not only troublesome, but also may cause injuries with the stapler teeth. Was required.
Alternatively, after forming a so-called one or two long net sheets from a long tubular tube body of an elastic net, a synthetic resin header is welded to one side constituting the opening,
There is also a method of stacking net sheets having this header, welding the bottom and both sides, and then cutting at both sides to form a bag, but a process for forming the net sheet is necessary, and as much as possible In order to make many bags with a small number of processes, some solution was required.

Next, the long tubular tube body of the elastic net is flattened, one side thereof is opened, and the other side is opened to form a folded half-length long net sheet. Even in the method of thermally fusing the front and back net sheet portions in the width direction of the net sheet at predetermined intervals in the longitudinal direction to form a bag, only one bag can be sequentially made in one flow step, and a large number of bags are made. Had to operate many bag making machines in parallel, which was unsuitable for mass bag making. In some cases, it takes time and effort to weld the header portion, and in some cases, it is not suitable for a large amount of bag making in a series of steps. In addition, it has been often used in the past to put the bag on the table as it is even with the bag sent out from the bag making machine, but this is extremely inconvenient for packing etc. since the bags are stacked and collapsed. there were.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks and to make it possible to make a large number of bags at one time with one bag making machine and to make the bag making machine compact. . In addition, the present invention also provides a bag making method, a bag making machine, and a bag which enable bag making in a continuous process. For this reason, the invention of claim 1 is a process in which a long tubular tube body of a stretchable net made of a thermoplastic synthetic resin made of a non-woven netting or a woven netting is flattened out and fed out in the longitudinal direction, The long tubular tube body of the elastic net is cut into two pieces from the center in the width direction, and one end side is bent and the other end side is cut open to form two half-folded long net sheets. A step of partially overlapping the header on the cut side of the long net sheet, welding the header attached to the net sheet, and sealing the width direction of the net sheet by welding. And a step of cutting a net sheet having a header at the seal portion. This method can be solved by a method for forming a bag made of a thermoplastic synthetic resin bag of a nonwoven or woven mesh having a header.

[0008] Alternatively, the long tubular tube body of the elastic net according to the invention according to the second aspect is flattened out and fed out in the longitudinal direction, and the extended long tubular tube body of the elastic net is taken out. A step of cutting it into two from the center in the width direction to form two half-folded long net sheets, one end of which is bent and the other end is cut open;
A step of providing a constant interval between the two opened half-folded long net sheets, and a step of attaching a header to the two half-folded long net sheets having a fixed interval, Welding each of the headers attached to the two long net sheets; cutting the header attached to the long net sheets; and welding the width direction of the net sheet having the headers. The same problem can be solved by a bag-making method including a step of forming a seal portion and a step of cutting a net sheet having a header at the seal portion.

[0009] Further, as in the invention according to claim 3, a step of extending the elongated tubular tube body of the elastic net in a flat state and extending in the longitudinal direction, and extending the elongated tubular tube body of the extended elastic net. Is cut into two from the center in the width direction to form two half-folded long net sheets in which one end is bent and the other end is cut open,
A step of providing a fixed interval between the two opened half-folded long net sheets; and attaching a header to both sides over the two half-folded long net sheets having a fixed interval. A step of welding the headers attached to the two long net sheets, a step of cutting the headers attached over the long net sheets, and a header attached to one surface of the net sheet. Cutting at an arbitrary point between the cut side of the header and the welded portion of the header, forming the header narrower than the other headers, and welding the width direction of the net sheet having the header to form a seal portion. The method may be a bag making method including a step of cutting a net sheet having a header at the seal portion.

The bag making method according to claim 4, wherein headers are attached to both sides of the two half-folded long net sheets, and a header constituting one side is a header narrower than the other headers. Is also good. Alternatively, the problem can be similarly solved by the bag making method according to claim 5, wherein a header is attached to only one surface of the two long half-length net sheets. In particular, the invention according to claim 6 may be a bag-making method comprising a step of attaching an adhesive member to a header attached to the long net sheet, and attaching a release sheet to the adhesive member attachment surface. Even the invention according to claim 7 including the step of arranging the bags manufactured by such a bag making method in a substantially scale-like manner by a stacking conveyor, the bag can be easily sent to the next step.

Alternatively, a roller for feeding out a long tubular tube of a thermoplastic synthetic resin stretchable net made of a non-woven or woven mesh according to claim 8 in a flattened state, and a roller which is fed out. A cutting machine that cuts a long tubular tube body of an elastic net into two from the center in the width direction to form two half-folded long net sheets, and two half-folds cut into two. A roller that partially overlaps and attaches the header to the cut side of the long net sheet in the state, header welding means for welding the header attached to the net sheet, and welding in the width direction of the net sheet having the header. The problem can also be solved by using a bag making machine including a side welding means for forming a sealing portion by means of a seal and a cutting machine for cutting a net sheet having a header at the sealing portion.

Instead of this, the long tubular tube body of the elastic net is flattened out by a roller and is fed out in the longitudinal direction, and the long tubular tube body of the elastic net is placed at the center in the width direction by a cutting machine. The part was cut into two to form two half-folded long net sheets, and a fixed interval was provided between the two half-folded long net sheets by a roller, and the fixed interval was provided. A header is attached between the two half-folded long net sheets, the header attached to the net sheet is welded by the header welding means, and the width direction of the net sheet having the header is welded by the side welding means. The present invention can also solve the problem similarly in a bag making machine in which a seal portion is formed and a cutting machine cuts a net sheet having a header at the seal portion. Alternatively, a bag making machine having a stacking conveyor for sequentially arranging bags made by such a bag making machine in a substantially scale-like manner and capable of sequentially sending the completed bags to the next process without stacking them is further provided by the invention according to claim 10. The problem can be easily solved.

[0013] Alternatively, in a bag body having a half-folded portion of the half-folded net sheet as a bottom, a header is welded to each open end of the half-folded net sheet, and a header of one of the headers is formed. The bag according to claim 11, wherein a side surface of the bag is formed by adhering a release sheet to the inner surface via an adhesive member, and welding both sides of the net sheet overlapped by half-folding to form a side portion of the bag. A wide header is welded to one open end of the overlapped net sheet, a narrow header is welded to another open end of the net sheet, and an adhesive member is attached to an inner surface of the wide header among the headers. 13. A header is welded only to one open end of the bag according to claim 12, wherein the release sheet is adhered via a half-fold, or a net sheet laminated by half-folding, and peeled off via an adhesive member to the inner side surface of the header. Paste sheet Bag of claim 13 wherein the, or claim 1 in which the header comrades than welded portion between the net sheet and the header has attached a release sheet over a range flush contact when having a header to the open end side of the net sheet
The problem can be similarly solved by the bag described in Item 4.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a view showing an embodiment of the present invention for explaining an embodiment of the present invention. First, a so-called tubular elastic net body 1 is drawn out of a drum around which a long tubular elastic net tube body of a thermoplastic synthetic resin of nonwoven or woven mesh is wound. At the time of this drawing, it may be one that is drawn out intermittently or one that uses the step roll 3. Then, the drawn-out tubular elastic net body 1 is drawn out and flattened by, for example, an auxiliary pulling-out roller 4 and then cut into two pieces by a cutting machine 2 from the center in the width direction. As a result, the tubular net body is cut at the center thereof, and two sets of the half-folded long net sheet 1 having two edges at the cut portion and a bent shape at the other end are formed. Is done. That is, two half-folded long net sheets 1 are formed with one end side bent and the other end side cut open. For this cutting, for example, a cutting blade may be used, or a heating cutting blade may be used. The two half-folded long net sheets 1 are sent in such a manner that they are shifted in the width direction so as to leave a constant interval between the long net sheets 1. This can be achieved by, for example, feeding the next long process while gradually increasing the interval between the long net sheets 1 by the auxiliary feed roller 4 or other rollers.

Next, this half-folded long net sheet 1
Headers 5 are respectively attached to the cut sides so as to cover the gap between the spaces, that is, the gaps. That is, the header 5 has one header sheet attached to each of the front and back surfaces of the flat net body, and both side edges of the header 5 are partially attached to the cut-out edges of the long net sheet 1. Served with overlapping. The header 5 is guided to a predetermined position by a roller 51. Next, the layered portion of the sent long net sheet 1 with the header 5 is welded by the header welding means 6. Particularly, since the header 5 is made of a thermoplastic synthetic resin, it can be welded. In FIG. 1, welding is performed by sealing with a seal bar 6 for the header.
The header welding means 6 may be heat welded by a seal bar as described above, or may be welded by using high-frequency induction heating or ultrasonic heating. As a result, the header 5 is welded. In this welding, for example, a glass cloth or a Teflon sheet is interposed between the sheets 1 constituting the front and back surfaces of the bag to prevent welding between the front and back sheets. Or may be welded for each of the net sheets corresponding to the front and back surfaces.

Also, in this figure, a header 5 made of one long sheet is attached to the front and back surfaces of the net sheet 1, but is not limited to this. For example, only one header sheet 5 is attached to the back surface. May be added. Next, the header 5 is cut at the center by a cutting machine 7. Then, only the header 5 located on the front surface is turned up by the plate 15 for raising only the header 5 on the front surface. Thereby, the header 5 located on the back surface is exposed. Next, an adhesive member 81 is attached to the header 5 located on the back surface by an adhesive member attaching machine 8, and then a release sheet 9 is attached to the adhesive member attaching surface. Then, the turned-up header 1 on the front side is closed again by the holding plate 16 so that the headers 1 on the front and back sides are aligned so as to overlap. Next, the side body forming the side surface of the bag is sealed and welded by a side welding means 10, for example, a side sealing machine 10, to form the bag.
This seal may be heat welded by a seal bar, high frequency induction heating, or welded by ultrasonic heating.

Next, after the heat generated by the seal on the side of the bag is removed by the cooling bar 11, the individual bags are cut by the cutting machine 13 along the center of the seal on the side of the bag. it can. For this cutting, for example, a cutting blade may be used, or a heating cutting blade may be used. Reference numeral 12 denotes a drawer roll, which feeds the net sheet 1 at the same speed as the auxiliary drawer roll 4. Considering the sealing time, it is best to perform the intermittent feed at the same speed. The bag 1A thus configured is intermittently sent out, and the sent out bag 1A is further sent to the stacking conveyor 14 for packing or the like. In the conventional form without such a feed conveyer, the bags 1A made and sent are piled up, and especially in a bag having a header, the bulk of the header is large. This stacking conveyor 14 makes it possible to put the intermittently sent bags on the conveyor in a constantly shifted state. 1A can be prevented from falling down.

FIG. 2 is a diagram showing a state in which only the header 5 on the front surface is turned up by the rising plate. As a result, a gap is formed in the header 5 on the front surface, and the header 5 on the back surface comes out.
1 and the release sheet 9 can be attached.

FIG. 3 is a view showing an embodiment in which a part of the header 5 on the surface is cut off by the cutting machine 7 without using such a starting plate. As a result, the header 5 on the front surface becomes shorter than the header 5 on the rear surface, and it becomes possible to attach the adhesive member 81 to the header 5 on the rear surface and to attach the release sheet 9 to the header 5 on the rear surface. Note that FIG.
A cutting machine 7 for cutting a part of the header 5 on the surface
At both ends, and the cutting machine 7 at the center is
For cutting off.

FIG. 4 is a diagram showing an outline of one embodiment of a flow of a bag making method and a bag making machine according to the present invention. First, a so-called tubular elastic net body 1 is drawn out by a roller from a drum around which a long tubular elastic net tube body of a thermoplastic synthetic resin of non-woven or woven mesh is wound,
This stretchable net is cut in two at its center. Next, the tension is adjusted by the step roll 3, and the net sheet 1 is pulled out by the auxiliary pull-out roll 4, flattened, and sent to the next step at a predetermined interval. Next, headers 5 are bent on both sides of the sent net sheet 1, sealed by a sealing machine which is a header welding means 6, and then cut at a central portion of the header 5 by a cutting machine 7. As for the cutting by the cutting machine 7, the front header 5 may be cut wide or at the center. An adhesive member 81, for example, a hot melt or the like is attached to the cut back header 5 by an adhesive member attaching machine 8, and a release sheet 9 is attached thereon. Thereafter, the side edges are sealed by a side edge sealing machine, which is the side welding means 10, which may be sealed by, for example, a press seal. However, a hot fusing seal may be used together with the subsequent cutting. Next, after being cooled by the cooling bar 11, it is cut by the cutting machine 13 at the side seal portion, and then sent to the stacking conveyor 14.

FIG. 5 is a diagram showing another embodiment.
First, a so-called tubular elastic net body 1 is drawn out of a drum around which a long tubular elastic net tube body of a thermoplastic synthetic resin of nonwoven or woven mesh is wound. This drawer is sent in an intermittent state,
Making bag making in a continuous process easier. The drawn-out tubular elastic net body 1 is drawn out and flattened by the rollers 4 and then cut into two pieces by the cutting machine 2 from the center in the width direction. As a result, the tubular net body 1 was cut at the center, and the cut portion had two edges and the other end was bent.
Two sets of long net sheets 1 in a half-folded state are formed.

Next, the long net sheet 1 in the half-folded state will be described.
, A header 5 is attached to each of the cut sides. The header 5 is attached to one end of the long net sheet 1 and attached to one surface of the long net sheet 1.
The adhesive member 81 is adhered to the long net sheet 1 after the release sheet 9 is adhered to the surface where the adhesive member is adhered. The header 5 is also provided on the other surface of the long net sheet 1.
Is attached. Thus, by peeling off the release sheet 9 during bag making, the headers 5 are adhered to each other by the adhesive member 81 and the opening can be closed. In this case, a wide header may be used for the header 5 to which the adhesive member 81 is to be attached, and a narrow header may be used for the other headers 5. Therefore, as described above, the header 5 is attached to each of the two long folded net sheets 1 and then sent to the next step. Next, the layered portion of the sent long net sheet 1 with the header 5 is sealed and welded. Next, after the header 5 is welded to the cut side of the net sheet 1, the side forming the side surface of the bag is sealed and welded to form the bag.

In the case shown in the figure, the flow of heat welding by one seal bar 10 is shown. However, the present invention is not limited to this, and the two sides are heat-sealed at once by both seal bars. May be thermally welded to the substrate. If the release sheet 9 attached to the header 5 is made of a member that is not a thermoplastic member but is not thermally welded, it will not be welded by the side seals, and the release sheet 9 at the opening of the bag body will have a content. When closing, the opening can be easily peeled off when closing the opening. Thereafter, the bag is cut along the central portion of the seal portion on the side portion to obtain individual bag bodies 1A. For this cutting, for example, a cutting blade may be used, or a heating cutting blade may be used.
Note that the step of cutting the bag after sealing both sides of the bag and forming the bag may be performed by thermal fusing. Numeral 11 denotes a cooling bar. For example, when a thermal fusing seal is performed, the cooling bar may be unnecessary. That is, the step of thermally welding both sides and the step of pressing and cutting the bar as they are are sequentially performed, and the thermal fusing is performed through both steps. The bags are intermittently sent out, and the sent out bags 1A are further sent to the stacking conveyor 14 for packing and the like.

FIG. 6 shows a case where the header 5 is connected to the long net sheet 1.
FIG. 4 is a view showing one step of welding only to one surface of the first embodiment. As in FIG. 5, first, a so-called tubular elastic net body is intermittently formed from a drum around which a long tubular elastic net tube of thermoplastic synthetic resin of non-woven or woven mesh is wound. Has been drawn to. The drawn-out tubular elastic net body is cut into two pieces from the center in the width direction by a cutting machine 2, and two sets of long net sheets 1 in a half-folded state are formed. Next, the headers 5 positioned by the rollers 51 are attached to one cut side of the long net sheet 1 in the half-folded state. Similarly to the above, an adhesive member 81 is attached to the edge of the header 5, and a release sheet 9 is attached to the adhesive member attachment surface, and then attached to the long net sheet 1. The header 5 is not used on the other surface of the long net sheet 1. Thereby, only the header 5 is provided on one surface of the bag.

Therefore, when the bag is used, the peeling sheet 9 is peeled off so that the header 5 can be bent toward the other surface of the bag and adhered to the side of the bag to close the opening.
Next, the layered portion of the sent long net sheet 1 with the header 5 is sealed and welded by a sealing machine as the header welding means 6. And sent net sheet 1
The side forming the side surface of the bag body is
A bag is formed by sealing and welding with a side sealing machine. Thereafter, cutting is performed along the central portion of the seal portion on the side portion to obtain individual bags 1A.
Next, the bags 1A obtained in this manner are sequentially sent in a scale-like manner by the stacking conveyor 14 or the like.

FIG. 7 is a view showing a bag obtained through the steps shown in FIG. The bottom portion of the bag 1A is located at both sides when the long tubular tube 1 of the elastic net is flattened, so that this portion has a bent shape without any sealing or the like. It is. Accordingly, the half-folded portion 1a of the half-folded net sheet becomes the bottom of the bag. Sides 1c of the bag 1A are sealed, and headers 5 are welded to the back and front surfaces, respectively, of the open ends 1b when they are overlapped by a half-fold net sheet as an opening. A release sheet 9 is adhered to the backside header 5 via an adhesive member 81. By peeling off the release sheet 9, the adhesive member 81 comes out and the bag 1A can be closed.

Accordingly, a bag 1A made of a non-woven mesh or woven mesh made of thermoplastic synthetic resin, having headers 5 of the same width on both sides at the opening thereof, and one header 5 opening direction An adhesive member 81 is applied in parallel with the end side portion 5a, and a release sheet 9 is attached to this adhesive surface. The adhesive member 81 does not need to be applied in a series from the side end 5c of the bag body 1A to the other side end 5c, and may be spotted at regular intervals. Alternatively, the adhesive member 81 may be applied only to the central portion. Further, the present invention is not limited to the case where the coating is applied to the opening end side portion 5a, and may be applied to the center portion or slightly near the center portion or the vicinity of the seal portion of the header 5. Further, not only a case where the coating surface is only partially provided, but also a wider range beyond this, or a configuration in which the adhesive member 81 is coated on the entire header 5 may be used. Good.

Next, it is sufficient that the release sheet 9 has a width at least at which the adhesive surface of the adhesive member 81 is hidden, and not only a narrow sheet but also a wide sheet that widely covers the adhesive surface of the adhesive member. May be used. In addition, the release sheet 9 is provided at the opening end side 5a of the header 5 of the bag 1A.
May be partially protruded beyond.
Alternatively, the release sheet 9 may cover the entire surface of the header 5 other than the seal portion. In particular, when a wide release sheet 9 extending to the opening direction of the bag 1A beyond the adhesive member 81 coating portion is used, or when the release sheet 9 is pasted beyond the opening side edge 5a, the release sheet is used. 9 becomes easy to pick, and it becomes the form which is easy to peel off. Therefore, for example, when the adhesive sheet 81 is applied to an arbitrary portion and then the release sheet 9 is adhered to almost the entire surface of the header 5 except for the seal portion, the release sheet 9 is made of a member that is not heat-sealed. In the manufacturing process of the body 1A, the net body 1 and the header 5 are welded to each other, but the other portions of the header 5 are not thermally welded, so that the header 5 can be widely opened, and the contents can be easily sealed. Not only that, unnecessary heat welding can be prevented in the production of a bag, which is extremely useful. A cut may be made in the side of the header 5 between the adhesive member 81 applied to the header 5 and the seal portion of the header 5, and the header 5 may be used for cutting off the portion of the header 5 when taking out the contents after closing once. Good.

FIG. 8 shows a bag obtained through the steps shown in FIG. The half-folded portion 1 of the elastic net 1 of the bag 1A
a forms a bottom, the side 1c of the bag 1A is sealed, and a narrow header 5 is welded to the surface of the opening which is the open end 1b of the half-folded net sheet. Has a wide header 5 welded thereto. A release sheet 9 is adhered to the backside header 5 via an adhesive member 81. The release sheet 9 is peeled off, the backside header 5 is bent, and the adhesive portion of the adhesive member 81 is attached to the side surface of the front side header 5. By pressing, the sticking and closing of the bag body 1A becomes possible. At the same time, patterns and characters can be described in advance not only on the header 5 on the back side but also on the header 5 on the front side, and the patterns and characters are printed on the header part in consideration of the attached state on the premise that they are folded and attached. You can do it. The application part of the adhesive member 81 may be applied not only in the case where it is made parallel to the end side 5a in the opening direction of the header 5 but also in an arbitrary part as described above.

For example, the bag 1A may not only be coated in a series from the side end 5c to the other side end 5c, but also may be spotted or applied only to the center. Good. Further, it may be applied to the opening end side portion 5a, or applied to a slightly central portion or the vicinity of the seal portion of the header 5. Further, not only the case where the coating surface is only partially provided but also a wider range beyond this, or the bonding member 81 is coated on the entire backside header 5. You may. That is, the header 5 on the back surface is bent and the adhesive member 81 is attached to the header 5 on the front surface.
In this case, not only the inner surface of the header 5 but also the outer surface of the header 5 can be adhered, so that the strength of the adhesive can be further increased. Next, similarly, the release sheet 9 only needs to have a width enough to hide at least the adhesive surface of the adhesive member 81, and a narrow sheet or a wide sheet may be used. The release sheet 9 may be a part of which projects beyond the opening of the header 5 of the bag 1A. At the same time, the release sheet 9 over the entire surface other than the seal portion of the header 5 on the back surface or the release sheet 9 partially protruding from the opening end side portion 5a beyond this may be attached. Or front header 5
At least the release sheet 9 may be used in a range where the release sheet 9 contacts. In these cases, welding of the headers 5 on the front and back sides can be prevented by the release sheet 9 as described above, so that it is not necessary to take measures to prevent welding in the manufacturing process, and the opening of the header 5 serving as the opening of the bag body is eliminated. It is easy to enclose the contents by taking it widely. It should be noted that a cutout for cutting out five parts of the header may be provided.

FIG. 9 shows a bag 1A having no header on the front surface and only the header 5 on the back surface. That is, this bag 1
Similarly, in A, the half-folded portion 1a of the elastic net 1 constitutes the bottom, the side of the bag is sealed, and the header 5 is welded to the back of the opening. A release sheet 9 is adhered to the header 5 on the back surface via an adhesive member 81. The release sheet 9 is peeled off, the header 5 on the back surface is bent, and a net bag in which the adhered portion of the adhesive member 81 is positioned on the front surface. The bag 1A is closed by pressing against the surface of the bag 1A. In this case, the application location of the adhesive member 81 is not limited to the case where it is parallel to the end 5a in the opening direction of the header 5 as described above, and may be applied to any location. From the side end 5c of the bag 1A to the other side end 5
Not only a series of coatings up to c, but also a coating on a spot or a coating only on the central portion may be used.

In addition, when it is coated on the edge of the opening,
A slightly central portion or near the seal portion of the header 5 may be used. Further, not only the case where the coating surface is only partially provided but also a wider range beyond this, or the bonding member 81 is coated on the entire header 5 on the back surface. You may. Adhesion to the surface of the net bag 1A can be performed over a wide range, and the opening can be more firmly closed. Next, similarly, the release sheet 9 only needs to have a width enough to hide at least the adhesive surface of the adhesive member 81, and may use a narrow sheet, a wide sheet, or the like. Alternatively, the release sheet 9 may have a part protruding beyond the opening edge 5a of the header 5 of the bag. It should be noted that a cutout for cutting out five parts of the header may be provided.

FIG. 10 shows an embodiment in which headers 5 of the same size are welded to the front and back surfaces of the bag 1A, respectively, and the wide release sheet 9 is used for the adhesive member 81 of one header 5 on the surface to be coated. It is a figure showing a form.

FIG. 11 shows a bag 1A in which a narrow header 5 is welded to the front surface and a wide header 5 is welded to the back surface. FIG. 3 is a diagram showing one embodiment using a release sheet 9.

[0035]

Advantages of the Invention A method for producing a bag made of thermoplastic synthetic resin of a nonwoven mesh or a woven mesh having a header according to the present invention, and by using a bag making machine, a large number of bags can be made in a continuous process. In addition, it is possible to make a bag with very few steps without going through many steps as in the related art. 2. Two bags can be obtained simultaneously in one continuous process,
Extremely efficient. Therefore, the use of the bag making according to the present method enables double the amount of bag making as compared with the case where one bag is conventionally manufactured one by one. In particular, it is extremely effective to increase the number of bags that can be made at one time as much as possible in order to manufacture a net bag that is as inexpensive as possible. And a bag making machine that makes this possible. 3. According to the present invention, it is possible to provide a bag body that does not use a stapler or the like and that can close the opening very easily after the contents are inserted.

[Brief description of the drawings]

FIG. 1 is a diagram showing a flow of an embodiment according to the present invention.

FIG. 2 is a diagram showing a state in which a starting plate is used.

FIG. 3 is a diagram showing a flow of an embodiment in which one header is narrowed.

FIG. 4 is a diagram showing a flow of an embodiment according to the present invention.

FIG. 5 is a diagram showing a flow of another embodiment according to the present invention.

FIG. 6 is a diagram showing a flow of another embodiment according to the present invention.

FIG. 7 is a view showing an embodiment of a bag according to the present invention.

FIG. 8 is a view showing another embodiment of the bag according to the present invention.

FIG. 9 is a view showing another embodiment of the bag according to the present invention.

FIG. 10 is a view showing another embodiment of the bag according to the present invention.

FIG. 11 is a view showing another embodiment of the bag according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 net sheet 1A bag 1a half-folded portion 1b open end 1c side 2 cutting machine 3 step roll 4 auxiliary drawer roll 5 header 5a opening end 5c side 51 roller 6 header welding means 7 cutting machine 8 adhesive member bonding Landing machine 81 Adhesive member 9 Release sheet 10 Side welding means 11 Cooling bar 12 Draw-out roll 13 Cutting machine 14 Stacking conveyor 15 Start-up plate 16 Pressing plate

Continued on the front page F term (reference) 3E064 AA03 BA10 BA60 GA06 HD07 HE01 HN24 HN62 3E075 AA04 AA05 BA42 CA04 DA03 DA04 DA05 DA14 DA15 DA32 DA34 DB13 DB14 DD13 DD38 DD46 DE01 DE16 GA02 GA04 GA05

Claims (14)

[Claims] 1. A step of stretching a stretchable tubular body of a thermoplastic synthetic resin made of non-woven or woven mesh into a flat state and paying it out in the longitudinal direction; A step of cutting the long cylindrical tube body into two from the center in the width direction to form two half-folded long net sheets 1 whose one end is bent and the other end is cut open; A step of partially overlapping the header 5 on the cut side of the long net sheet 1 and welding the header 5 attached to the net sheet 1; and welding the width direction of the net sheet 1. A step of forming a seal portion, and a step of cutting the net sheet 1 having the header 5 at the seal portion, wherein the bag is made of a nonwoven or woven thermoplastic synthetic resin having a header. How to make a body bag. 2. A step of extending a long tubular tube of a thermoplastic synthetic resin made of a non-woven net or a woven net into a flat state and feeding it out in the longitudinal direction; A step of cutting the long cylindrical tube body into two from the center in the width direction to form two half-folded long net sheets 1 whose one end is bent and the other end is cut open; The two long half-folded long net sheets 1
A step of providing a constant interval between them; a step of attaching a header 5 over two half-folded long net sheets 1 having a fixed interval; and a step of attaching the two long net sheets 1 to each other. A step of welding each of the headers 5; a step of cutting the header 5 attached along the long net sheet 1; and a step of forming a seal by welding the width direction of the net sheet 1 having the header 5 And a step of cutting the net sheet 1 having the header 5 at the sealing portion. A method for producing a bag made of a thermoplastic synthetic resin of a nonwoven or woven mesh having a header, comprising the steps of: 3. A step of stretching a long tubular tube of a thermoplastic synthetic resin made of a non-woven or woven mesh in a flat state and paying out in the longitudinal direction; A step of cutting the long cylindrical tube body into two from the center in the width direction to form two half-folded long net sheets 1 whose one end is bent and the other end is cut open; The two long half-folded long net sheets 1
A step of providing a fixed interval therebetween; a step of attaching headers 5 to both sides of the two half-folded long net sheets 1 having a fixed interval, respectively; Welding each of the headers 5 attached to the net sheet 1, cutting the header 5 attached to the long net sheet 1, and cutting the header 5 from the cut side of the header 5 attached to one surface of the net sheet 1. Cutting off the header 5 at an arbitrary position between the header 5 and the welded portion, forming the header 5 narrower than the other headers 5, and welding the width direction of the net sheet 1 having the header 5 to form a seal portion. And a step of cutting the net sheet 1 having the header 5 at the sealing portion. A method for producing a bag made of a thermoplastic synthetic resin of a nonwoven or woven mesh having a header, comprising the steps of: 4. A header, wherein headers 5 are attached to both sides of the long net sheet 1 in the two half-folded state, and the header 5 constituting one side is a header narrower than the other headers 5. Item 7. A bag-making method of a bag made of thermoplastic synthetic resin of a nonwoven or woven mesh having a header according to Item 1. 5. The nonwoven net fabric having a header according to claim 1, wherein a header 5 is attached to only one side of the long net sheet 1 in the two half-folded state. A bag-making method for a bag made of thermoplastic synthetic resin of woven netting. 6. The method according to claim 1, further comprising a step of attaching an adhesive member 81 to the header 5 attached to the long net sheet 1, and attaching a release sheet 9 to the adhesive member attachment surface. 5. A bag-making method of a bag made of a thermoplastic synthetic resin of a non-woven net or a woven net having the header according to any one of the above items 5. 7. A stacking conveyor 14 comprising a bag made of a thermoplastic synthetic resin bag of a nonwoven or woven mesh having a header according to any one of claims 1 to 6. A method of forming a bag made of a thermoplastic synthetic resin bag of a nonwoven mesh or a woven mesh having a header, comprising a step of arranging in a substantially scale-like manner. 8. A roller 4 for making a long tubular tube of a thermoplastic synthetic resin made of non-woven or woven netting into a flat state and feeding it out in the longitudinal direction; A cutting machine 2 which cuts a long tubular tube body into two from the center in the width direction to form two half-folded long net sheets 1, and two half-folds cut into two A roller 51 for partially attaching the header 5 to the cut side of the long net sheet 1 in the state, a roller 51 for welding the header 5 attached to the net sheet 1, and a net having the header 5 A nonwoven fabric having a header, comprising: side welding means 10 for welding a sheet 1 in a width direction to form a seal portion; and a cutting machine 13 for cutting the net sheet 1 having a header 5 at the seal portion. Bag making machine of a thermoplastic synthetic resin bag of the earth or Oamichi. 9. An elongated tubular tube body made of a thermoplastic synthetic resin made of non-woven or woven mesh,
The elongated net tube 1 is cut into two pieces from the center in the width direction by cutting the long tubular tube body of the stretchable net into two pieces by a cutting machine 2. And a fixed interval is provided between the two half-folded long net sheets, and a header 5 is attached between the two half-folded long net sheets 1 provided with the fixed interval. The header 5 attached to the net sheet 1 is welded by the header welding means 6, the width direction of the net sheet 1 having the header 5 is welded by the side welding means 10 to form a seal portion, and the cutting machine 13 A bag making machine for a nonwoven or woven net made of thermoplastic synthetic resin having a header, wherein the net sheet 1 having a header 5 is cut at the sealing portion. 10. A nonwoven netting having a header, comprising: a stacking conveyor 14 for sequentially arranging bags formed by the bag making machine according to claim 8 in a substantially scale-like manner. Bag making machine for bags made of woven mesh thermoplastic synthetic resin. 11. A bag having a half-folded portion 1a of a half-folded net sheet 1 as a bottom portion, wherein headers 5 are welded to open ends 1b of the net sheet 1 which are overlapped by half-folding, respectively.
A release sheet 9 is adhered to the inner surface of one of the headers 5 via an adhesive member 81, and both side edges 1c of the net sheet 1 overlapped by half-folding are welded to form side portions of the bag. A bag made of thermoplastic synthetic resin of a nonwoven mesh or a woven mesh having a header, characterized in that: 12. A bag having a half-folded portion 1a of a half-folded net sheet 1 as a bottom, and a wide header 5 welded to one open end 1b of the half-folded net sheet 1. A narrow header 5 is welded to the other open end 1b of the net sheet 1, and the wide header 5
The release sheet 9 is adhered to the inner surface of the net sheet 1 via an adhesive member 81, and the both sides 1
(c) a nonwoven or woven net made of thermoplastic synthetic resin having a header, wherein the side of the bag is formed by welding c. 13. A bag having a half-folded portion 1a of a half-folded net sheet 1 as a bottom portion, wherein a header 5 is welded only to one open end side 1b of the half-folded net sheet 1.
The release sheet 9 is adhered to the inner surface of the header 5 via an adhesive member 81, and the half-folded net sheet 1 is overlapped.
Characterized in that the side portions 1c are welded to form side portions of the bag body, and the bag body is made of a nonwoven or woven thermoplastic synthetic resin having a header. 14. The release sheet 9 is adhered over a range where the headers 5 are in contact with each other except for a welded portion between the net sheet 1 and the header 5.
3. A bag made of a thermoplastic synthetic resin of a non-woven or woven mesh having the header according to any one of 2.