WO2022176330A1

WO2022176330A1 - Bag manufacturing machine and bag manufacturing method

Info

Publication number: WO2022176330A1
Application number: PCT/JP2021/044947
Authority: WO
Inventors: 裕司熊本; 祐司大西
Original assignee: トタニ技研工業株式会社
Priority date: 2021-02-22
Filing date: 2021-12-07
Publication date: 2022-08-25

Abstract

This bag manufacturing machine manufactures a bag using a plurality of constituting elements including at least two web-shaped barrel materials. The bag manufacturing machine is provided with: a conveyance device that conveys a barrel material in a longitudinal direction of the barrel material; a temporary fastening device that temporarily fastens a first constituting element and a second constituting element among a plurality of constituting elements to each other; a bonding device that is provided downstream of the temporary fastening device and bonds the first and second constituting elements to each other; and a crosscut device that is provided downstream of the bonding device and crosscuts the barrel material in a width direction of the barrel material to manufacture a bag. The temporary fastening device is provided with a processing tool for deforming the first and second constituting elements. The temporary fastening device locally deforms the mutually laminated first and second constituting elements in a laminated direction by the processing tool and causes the same to engage with each other through a deformed portion thereof.

Description

Bag-making machine and bag-making method

The present application relates to a bag-making machine and a bag-making method for manufacturing a bag from a plurality of components including at least two web-shaped panel materials, and more particularly to temporary fastening before joining the components.

For example, a bag-making machine sequentially manufactures bags using two web-shaped panel materials. Additional bag components such as side gussets and soles may be added.

The bag making machine includes a conveying device for conveying the panel material in its longitudinal direction, a joining device for joining the components to each other by heat sealing or the like, and a joining device provided downstream of the joining device. a cross-cutting device for cross-cutting additional components in the width direction of the web to produce bags.

By the time the two components are joined together by the joining device, the relative positions of these components should not shift during transport. This is because misalignment between components can affect the appearance and function of the bag. Such a relative positional deviation can be caused by, for example, a difference in expansion ratio between constituent elements, or the constituent elements passing through a plurality of rollers during transportation.

For example, in Patent Document 1, a temporary fastening device temporarily fastens the side gusset material to the panel material. A separate tacking device tacks the bottom material to the panel material. This tacking prevents each component from being displaced with respect to the other until these components are heat-sealed (bonded). Tacking is a form of ultrasonic sealing or heat sealing.

This temporary fastening process is one of the important processes in bag making.

The purpose of the present application is to provide a novel form of temporary fastening of bag components.

WO2016/199863

According to one aspect of the present application, there is provided a bag-making machine for making bags using a plurality of components including at least two web-like panels.
The bag making machine
a conveying device for conveying the panel material in the longitudinal direction of the panel material;
a temporary fastening device that temporarily fastens a first component and a second component among the plurality of components to each other;
a joining device that is provided downstream from the temporary fastening device and joins the first and second components to each other;
a cross-cutting device provided downstream from the joining device for cross-cutting the panel material in the width direction of the panel material to manufacture the bag;
The temporary retaining device is
a processing tool for deforming the first and second components;
The first and second components stacked together are locally deformed in the stacking direction by the processing tool, and engaged with each other by the deformed portions.

The temporary retaining device is
at least one needle as the processing tool;
During pauses in the intermittent transport of the web, the needles are pierced through the first and second components to pierce the first and second components in the stacking direction at the edges of the holes formed. and a bending actuation unit.

The temporary retaining device is
a plurality of needles as the processing tool;
a rotating body having the needle provided on its outer peripheral surface,
The first and second components may be pierced by the needles and curved in the stacking direction at edges of the formed holes by rotating the rotary body as the panel material is conveyed.

The joining device may heat-seal the first and second components in a region including the hole, and fill the hole with the material of the component melted by the heat sealing.

The temporary retaining device is
a stamping die as the processing tool;
a cradle having a recess for receiving the stamp;
During a temporary stop of the intermittent conveyance of the panel material, the stamping die is moved to the cradle, and the first and second components are sandwiched between the stamping die and the recess in the stacking direction. and an actuation unit for embossing on.

The temporary retaining device is
a cutting tool as the processing tool including a U-shaped cutting edge and a pressing surface provided inside the cutting edge at a position retracted from the cutting edge;
a cradle having a recess for receiving the cutting edge;
During a pause in intermittent conveying of the web, the knife is moved to the cradle to cut the first and second components with the knife edge to form a tongue portion, and an actuating unit that presses the tongue portion against the concave portion by the pressing surface to displace the tongue portion in the stacking direction.

The joining device heat seals the first and second components in a region including the tongue portion, and fills the U-shaped notch with the material of the components melted by the heat sealing.

The temporary retaining device is
The first and second components may be deformed in areas removed as margins during crosscutting by the crosscutting device.

According to another aspect, there is provided a bag making method for making a bag using a plurality of components including at least two web-like panel members,
The bag-making method is
conveying the web in the longitudinal direction of the web;
tacking together a first component and a second component of the plurality of components;
joining the first and second components together after tacking; and
cross-cutting the web across the width of the web after bonding to produce a bag;
Tentatively:
locally deforming the first and second components stacked together in the stacking direction by a processing tool so that the deformed portions engage with each other.

The processing tool is
at least one needle for piercing said first and second components;
a die for embossing said first and second components; and
a knife for cutting the first and second components into a U-shape;

For example, the first component may be the panel material and the second component may be the bottom material. Also, the first component may be the panel material and the second component may be the side gusset material. Alternatively, the first component may be one of the panel members and the second component may be the other panel member.

The first and second components may be heat-sealed in the area containing the deformed portion.

The bag-making method may remove the region including the deformed portion of the first and second components to produce a bag that does not include the deformed portion.

FIG. 1A is a schematic plan view of an exemplary bag making machine, and FIG. 1B is a front view thereof. FIG. 2 is a schematic cross-sectional view illustrating the positional relationship of components. FIG. 3 is a schematic plan view illustrating the formation of sealing holes in the bottom material. FIG. 4 is a schematic partial plan view of the panel and sole; FIG. 5 is a schematic front view of an exemplary bag. FIG. 6A is a schematic front view of an exemplary tentative fastening device, and FIG. 6B is a bottom view thereof. FIG. 7 is a schematic partial front view of another exemplary temporary fastening device; FIG. 8 is a schematic cross-sectional view of a perforated component. 9A is a schematic partial plan view of another exemplary bag making machine, and FIG. 9B is a front view thereof. FIG. 10 is a schematic view of the positional relationship between the side gusset material and the panel material viewed from the width direction of the panel material. 11A and 11B are schematic partial plan views of the panel and side gusset materials. FIG. 12 is a schematic front view of another exemplary bag. 13A is a schematic side view of yet another exemplary tacking device with the needle retracted, and FIG. 13B is a schematic side view of the tacking device of FIG. 13A with the needle extended. FIG. 14 is a modification of the temporary fastening device of FIG. 15A is a schematic front view of yet another exemplary tacking device, and FIG. 15B is a schematic plan view of the cradle of FIG. 15A. 16A is a schematic plan view of the embossed component and FIG. 16B is an enlarged cross-sectional view taken along line SS of FIG. 16A. 17A is a schematic front view of yet another exemplary temporary fastening device, and FIG. 17B is a schematic plan view of the cradle of FIG. 17A. 18A is a schematic plan view of the cut component and FIG. 18B is an enlarged cross-sectional view of FIG. 18A along line TT.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In embodiments, identical or similar features are labeled with the same reference numerals.

A strip of film 1 is continuously unwound from a raw web 1', stored in an accumulator 40, and slit by a dividing unit 41 including a slitter (M plate) into two web-

like panels

10, 11. . The

webs

10 and 11 are then separated vertically and pass through double dancers 42 . The

webs

10, 11 consist of laminates or monolithic films.

The bag making machine includes a conveying device 43 for intermittently conveying the

panel members

10 and 11 in the longitudinal direction of the

panel members

10 and 11 . That is, the

webs

10 and 11 are repeatedly transported and temporarily stopped. Its transport direction is indicated by the symbol X1. The conveying device 43 includes a plurality of conveying roller pairs 430 and 431 arranged at appropriate intervals for conveying the

webs

10 and 11 . The double dancer 42 appropriately switches the continuous conveying of the

webs

10, 11 to the intermittent conveying. The conveying device 43 further comprises a guide roller 432 arranged downstream from the double dancer 42, and at the position of the guide roller 432, the

webs

10, 11 are superimposed on each other. Downstream of the guide roller 432, the conveying device 43 intermittently conveys the

panel materials

10 and 11 in a state of being superimposed on each other.

The bag making machine is equipped with a parts supply device 44. A parts feeder 44 feeds ancillary components between the

webs

10 and 11 in the section from the double dancer 42 to the guide rollers 432 . Thereafter, when the

webs

10, 11 are superimposed on each other at the position of the guide rollers 432, the attached components are sandwiched between the

webs

10, 11 and transported intermittently with the

webs

10, 11.

As shown in FIG. 1A, the parts supply device 44 supplies the web-like bottom material 20. As shown in FIG. Here, the web-like bottom material 20 is made of a double-folded laminate or a single-material film. The parts supply device 44 inserts the two bottom members 20 between the

panel members

10 and 11 from both sides of the

panel members

10 and 11, and pushes them at the positions of both side edges of the

panel members

10 and 11 by turning bars (not shown). The direction is changed to the conveying direction X1 of the

panel members

10 and 11 .

For example, the parts supply device 44 also supplies continuous chucks 3 . The parts supply device 44 inserts two chucks 3 between the

panel members

10 and 11 from both sides of the

panel members

10 and 11, and at positions separated from the longitudinal center lines of the

panel members

10 and 11, A guide (not shown) changes direction in the conveying direction X1 of the

panel members

10 and 11 .

FIG. 2 is a cross-sectional view perpendicular to the conveying direction X1 immediately downstream of the guide roller 432, and schematically shows the positional relationship of the

components

10, 11, 20, and 3. The bottom material 20 has an inner edge 200 and an outer edge 201 . The continuous chuck 3 is composed of a male member 30 and a female member 31 that are detachably fitted to each other, and supplied by the parts supply device 44 in a state where they are fitted to each other.

As shown in FIGS. 1A and 1B, the bag making machine further comprises a hole forming device 45 provided for each bottom material 20 at a position upstream from the guide rollers 432 . As shown in FIG. 3, the device 45 punches the bottom material 20 with a punch to form a sealing hole 202 in the bottom material 20 each time the bottom material 20 is conveyed intermittently. This hole 202 is used for lateral heat sealing, which will be described later.

As shown in FIGS. 1A and 1B, the bag making machine further includes a chuck sealing device 46 which is provided downstream from the guide rollers 432 and heat seals the chuck 3 to the

panel members

10 and 11 . The sealing device 46 heat seals the male material 30 to one panel material 10 and heat seals the female material 31 to the other panel material 11 every time the sheets are conveyed intermittently by means of a heat seal bar.

The bag making machine further comprises a temporary fastening device 7 that temporarily fastens the components of the bag together. The tacking device 7 of the embodiment is provided for each of the bottom members 20 at a position downstream of the guide roller 432 and configured to temporarily tack the bottom members 20 to the

panel members

10 and 11 . The configuration of the temporary retaining device 7 will be described later.

The bag making machine further comprises an adjusting device 47 provided downstream from the chuck seal device 46 and the temporary fastening device 7 for adjusting the tension of the

panel members

10 and 11 . The adjustment device 47 comprises two fixed rollers 470 which are fixedly arranged and engage the

webs

10, 11 and a movable roller 471 which is arranged between the fixed rollers 470 and engages the

webs

10, 11. Prepare. By moving the movable roller 471 vertically with respect to the fixed roller 470, the tension applied to the

cylinder materials

10 and 11 is adjusted within an appropriate range in the section from the conveying roller pair 430 to the conveying roller pair 431. there is The adjusting device 47 prevents an excessive increase or decrease in tension that may occur due to a difference in the amount of transport between the pair of

transport rollers

430 and 431 .

The bag making machine further comprises at least one processing device provided in the processing section 48 downstream from the adjustment device 47 and processing the components of the bag. The processing device includes a joining device for joining together the bag components tacked together by the tacking device 7 . In the embodiment, the joining device includes a vertical sealing device and a horizontal sealing device.

FIG. 4 is a partially enlarged plan view of

panel members

10 and 11 at the position of one bottom member 20. FIG. In the embodiment, the vertical sealing device applies a heat seal bar to the bottom material 20 to the

panel materials

10 and 11 in the longitudinal direction of the

panel materials

10 and 11 and along the outer edge 201 of the bottom material 20 at each intermittent feed. and heat seal. The heat-sealed area by the vertical sealing device is indicated by symbol P and dashed line in FIG.

In the embodiment, the horizontal sealing device heat-seals the

panel members

10, 11 and the bottom member 20 in the width direction of the

panel members

10, 11 by means of the heat-seal bar every time the panel members are fed intermittently. More specifically, the

panel members

10 and 11 are heat-sealed together where the bottom member 20 does not exist. Here, at the position of the sealing hole 202, the

panel members

10 and 11 are heat-sealed to each other through the sealing hole 202. As shown in FIG. Further, the bottom material 20 is heat-sealed to the

panel materials

10 and 11 where the bottom material 20 exists. The heat-sealed area by the lateral sealing device is indicated by the symbol Q and the dashed line in FIG.

Although the other bottom member 20 is omitted in FIG. 4, the vertical heat sealing and the horizontal heat sealing are performed on the other bottom member 20 as well.

Furthermore, the processing device may further include a device that processes the constituent elements and imparts functions such as corner cutting and notching to the bag.

As shown in FIGS. 1A and 1B, the bag making machine includes a slitter 49 downstream from the processing section 48 for slitting the

panel materials

10 and 11 in the longitudinal direction of the

panel materials

10 and 11 . The

webs

10, 11 are slit at a position between the two chucks 3 by the slitter 49 as the

webs

10, 11 are conveyed.

The bag making machine further includes a cross-cutting device 50 provided downstream of the slitter 49 for cross-cutting the

panel members

10 and 11 in the width direction of the

panel members

10 and 11 to produce the bag 6 of FIG. . In the embodiment, the cross-cutting device 50 manufactures the bag 6 by cross-cutting the

panel members

10, 11, the chuck 3 and the bottom member 20 with a cutter each time they are intermittently conveyed. Two bags 6 are formed for each crosscut. The cross-cut position is within the lateral heat seal region Q. The cross-cut device 50 may perform two cuts in one cross-cut cycle, and remove the area indicated by the symbol R and the dashed line in FIG. 4 as a margin.

In the bag 6 of FIG. 5, the bottom seal portion 60 is formed by vertical heat sealing by the vertical sealing device described above. Moreover, the side seal portion 61 of the bag 6 is formed by lateral heat sealing by a lateral sealing device.

The temporary fastening device 7 is equipped with a processing tool for curving the component, and temporarily deforms the component by the processing tool.

The temporary fastening device 7 illustrated in FIGS. 6A and 6B includes a plurality of needles 70 arranged in a straight line as a processing tool. Needles 70 are each tapered and have a sharp tip. Furthermore, the temporary fastening device 7 comprises an actuating unit 71 which supports these needles 70 and moves them in the vertical direction Y by means of actuators, for example cylinders. During pauses in the intermittent transport of the

webs

10, 11, the temporary fastening device 7 moves the needles 70 by means of the actuating unit 71 to pass the needles 70 through the components stacked on top of each other and to , and then the needle 70 is withdrawn from the component.

The exemplary temporary fastening device 7 of FIG. The plurality of needles 70 are arranged on the outer peripheral surface of the rotating body 72 at appropriate intervals and extend radially. As the rotor 72 rotates as the

webs

10, 11 are transported, the needles 70 penetrate and perforate the stacked components and then exit the components.

A regulating member 79 may be positioned on either side of the needle 70 and positioned above the component being transported. The restricting member 79 may be, for example, a flat plate. Such a plate may have upwardly curved ends. As the needle 70 exits the component, the component abuts against the restricting member 79 and is not lifted any further with the needle 70 . That is, the regulating member 79 facilitates the disengagement of the needle 70 from the constituent elements and prevents the constituent elements that are in close contact with each other from coming apart.

The number, diameter, and length of the needles 70 are appropriately set according to the material and thickness of the constituent elements.

As shown in FIGS. 1A and 1B, in the embodiment, the temporary fastening device 7 is provided for each of the bottom materials 20 to temporarily fasten the bottom materials 20 to the

panel materials

10 and 11 .

FIG. 8 shows a cross section of the

panel members

10, 11 and the bottom member 20 pierced by the needle 70. FIG. During perforation, holes 80 are formed in the

panel members

10, 11 and sole member 20 by the needles 70. FIG. As a result, at the edge of the hole 80, the

panel materials

10, 11 and the bottom material 20, which are stacked together, are locally bent in the stacking direction Y (vertical direction in the embodiment, more specifically downward direction Y1) by the needles. be done.

Adjacent components

10, 11, 20 then closely engage each other at this curved portion. The curved portions thus provide a tack between

adjacent components

10, 11, 20. FIG. In this way, the bottom member 20 is temporarily fixed to the upper and lower panel members 10 and 11.例文帳に追加The

panel members

10 and 11 are also temporarily fastened to each other via the bottom member 20.例文帳に追加

In order to prevent the hole 80 from remaining in the bag 6 as a mark, the temporary fastening device 7 forms the hole 80 as a margin in the region R to be removed during crosscutting, as shown in FIG. good.

The temporary fastening device 7 perforates the

components

10, 11, 20 in the heat-sealed area P or Q by the joining device (vertical sealing device or horizontal sealing device) to form a hole 80 in the heat-sealed region P or Q. good too. Then, at the time of heat sealing, the hole 80 may be filled with the material (resin) of the

component

10, 11 or 20 melted by the heat sealing. This makes the perforation scars less noticeable in the finished bag 6 when the perforations 80 are small.

Another exemplary bag making machine is shown in FIGS. 9A and 9B, but has a configuration similar to that of FIGS. be done.

In this embodiment, the parts supply device 44 supplies the side gusset material 21 between the

panel materials

10 and 11 instead of the bottom material and zipper. The side gusset material 21 is a laminate or single material film that is folded in two on both sides with respect to the centerline 21c. As shown in FIG. 10, the parts supply device 44 places the side gusset material 21 on the lower panel material 10 so that the layer including the film end edges 211 is the lower layer. At the same time, the parts feeder 44 temporarily fastens the side gusset material 21 to the lower panel material 10 at the center line 21c by heat sealing, side sealing, or the like.

After that, the side gusset material 21 is sandwiched between the

webs

10 and 11 at the position of the guide rollers 432 .

The tacking device 7 of FIGS. 6A, 6B or 7 pierces the laminated side gusset material 21 and

panel material

10, 11 with needles 70 to tack these

components

10, 11, 21 together. do. Here, the temporary fastening device 7 perforates the

components

10 , 11 , 21 at one end of the side gusset material 21 at a plurality of locations across the width of the side gusset material 21 . Tacking by drilling is as described in FIG. 8 and previous embodiments.

11A and 11B are partial enlarged plan views of the

panel members

10 and 11 at one end of the side gusset member 21, respectively. 6A and 6B, the temporary fastening device 7, as shown in FIG. The gusset material 21 and the

panel materials

10, 11 are temporarily fastened together. In the case of the tacking device 7 of FIG. 7, the tacking device 7 pierces and tacks the

panel members

10, 11 and the side gusset material 21 to each other where the side gusset material 21 exists, as shown in FIG. 11B, Furthermore, where side gusset material 21 is not present,

panel members

10 and 11 are perforated and directly tacked together.

The side gusset material 21 is temporarily fastened to the lower panel material 10 by the parts supply device 44 only at some locations on the center line 21c. Therefore, the side gusset material 21 can be entirely lifted from the lower panel material 10 at one end only by this temporary fastening. Due to this floating, when the side gusset material 21 is machined in the machining section 48, the bent edge 210 may be caught by a member of the machining device, resulting in a problem of improper machining. The temporary fastening device 7 temporarily fastens the side gusset material 21 to the panel material 10 over the width of the side gusset material 21 at one end of the side gusset material 21, thereby suppressing the lifting of the side gusset material 21 and avoiding the above problem. .

These

components

10, 11, 21 are then sent through the adjustment device 47 to the processing section 48 and processed by the processing device. These

components

10, 11, 21 are then cross-cut by cross-cutting device 50 to produce bag 6 of FIG.

Specifically, in the processing section 48, a vertical sealing device as a joining device connects the

panel members

10 and 11 together, the side gusset member 21 to the

panel members

10 and 11, and the longitudinal direction of the

panel members

10 and 11. Then, along one side of the webs 10, 11 (hence in area P in FIGS. 11A, 11B), heat seal is performed. A bottom seal portion 60 of the bag 6 in FIG. 12 is formed by the vertical heat sealing.

Further, the lateral sealing device as a joining device connects the side gusset material 21 to the

panel members

10 and 11 in the width direction of the

panel members

10 and 11 along the center line 21c (therefore, the area Q in FIGS. 11A and 11B). in) and heat seal. A side seal portion 61 of the bag 6 in FIG. 12 is formed by the lateral heat sealing.

The cross-cut device 50 cross-cuts the

panel members

10 and 11 and the side gusset member 21 within the lateral heat-sealing region Q.

When the

cylinder materials

10 and 11 with printed patterns are used, the conveying amount is controlled for each intermittent conveying cycle by the mark sensor 51 and conveying roller pairs 430 and 431 shown in FIGS. 9A and 9B. This control may change the tension of the

panel members

10 and 11, but even in that case, the adjustment device 47 adjusts the tension within a certain range.

Also in this embodiment, the hole 80 may be filled with the material (resin) of the

component

10, 11 or 21 melted by heat sealing so that the trace of perforation in the completed bag 6 is inconspicuous. Alternatively, the perforation locations, i.e. the areas containing the holes 80, may be removed by cutting, e.g. slits, so that the finished bag 6 does not have the holes 80. FIG.

FIG. 13A is a side view of the improved temporary fastening device 7 of FIGS. 6A and 6B. The temporary fastening device 7 further comprises a cover 73 having a hole 730 through which the needle 70 can pass, and a biasing member 74 (eg, a spring) biasing the cover 73 downward.

In Figure 13A, the needle 70 is in a retracted position from the bag component to be punctured. Needle 70 does not protrude downward from cover 73 . In FIG. 13B, the needle 70 is in a position to pierce the bag component. Needle 70 projects downwardly from cover 73 through hole 730 to pierce the bladder component. After piercing, when the needle 70 is retracted out of the component, the cover holds the component downward to restrict upward movement of the component. This prevents the components that are stuck together from coming apart as the needle 70 exits the component.

The temporary fastening device 7 includes an elastic member such as a sponge disposed around the needle 70, and when the needle 70 is pierced and pulled out of the bag components, the elastic member presses the bag components to may be prevented from coming apart.

FIG. 14 shows the improved temporary fastening device 7 of FIG. Temporary fastening device 7 further comprises a receiver 75 for receiving needle 70 . The receiver 75 of the embodiment is a brush having a base 750 and brush bristles 751 planted on the base 750 . Brush bristles 751 face the rotating body 72 . The bristles 751 are longer than the protrusion of the needle 70 from the

components

10, 11, 20/21 during piercing. The

webs

10, 11 together with the attached components 20/21 pass between the rotating body 72 and the bristles 751.

Receptacle 75 receives

components

10, 11, 20/21 and needle 70 during drilling, thereby assisting in the formation of curved portions at the edges of hole 80 while needle 70

supports components

10, 11. , 20/21.

A flat base 750 was used in the illustration of FIG. Alternatively, the base 750 of the receiver 75 may be configured as a cylindrical rotating body similar to the rotating body 72 , and the brush bristles 751 may be planted on the circumferential surface of the rotating body (base) 750 . good. In this case, the upper and lower

rotating bodies

72, 750 rotate in conjunction with the transportation of the

components

10, 11, 20/21, and the sticking and extracting operations are performed more smoothly.

Instead of the brush, the receiver 75 may be made of rubber, leather, or the like, which is thicker than the amount of projection of the needle 70 from the

components

10, 11, 20/21 at the time of piercing.

A further exemplary temporary retaining device 7 may be used instead of the temporary retaining device described above. The temporary fastening device 7 of FIG. 15A includes a stamping die 76 as a processing tool, a cradle 77 and an operating unit 71 . The stamping die 76 has, for example, a substantially cylindrical shape.

15B is a plan view of the cradle 77. FIG. The cradle 77 has a recess 770 for receiving the stamp 76 . Recess 770 has a complementary shape that is slightly larger than the tip of stamp 76 . The cradle 77 faces the pressing die 76 in the vertical direction Y at the position of the recess 770 . The cradle 77 is fixed to the frame of the bag making machine. The

webs

10, 11 are conveyed intermittently so as to pass between the die 76 and the cradle 77 with the associated components 20/21.

The actuating unit 71 of this embodiment moves the pressing die 76 in the vertical direction Y with respect to the cradle 77 to approach and separate from it.

While the intermittent conveyance of the

webs

10 and 11 is temporarily stopped, the tacking device 7 moves the stamping die 76 toward the cradle 77 in the downward direction Y1 by the operation unit 71, thereby 10, 11 and the bottom material 20/side gusset material 21 are sandwiched between the stamping die 76 and the recess 770 and embossed in the downward direction Y1 (one of the stacking directions Y). Then, the temporary fastening device 7 moves the pressing die 76 upward by the operation unit 71 to retreat from the receiving table 77 .

FIG. 16A is a partial plan view in which the embossed portions of

components

10, 11, 20/21 are indicated by phantom lines and numeral 81. FIG. FIG. 16B is an enlarged sectional view taken along line SS of FIG. 16A. The

components

10 , 11 , 20 / 21 are embossed in the downward direction Y 1 and are locally recessed and closely engage each other at this embossed portion 81 . The embossed portion 81 thus provides a temporary fastening between the

components

10, 11, 20/21.

When the concave portion 770 has a steeper stepped portion, the embossed portion 81 has a sharper stepped portion, and therefore, a higher temporary fixing (prevention of positional deviation) effect is achieved.

The area containing this embossed portion 81 may be subsequently removed by cutting, such as cross-cutting or slitting, so that the bag 6 does not have the embossed portion 81 . Also, a bonding device (vertical or horizontal sealing device) heat seals (heats and presses) the

components

10, 11, 20/21 in the area containing the embossed portion 81 to make the embossing marks visible. can be omitted.

The temporary fastening device 7 illustrated in FIG. 17A includes a cutting tool 78 as a processing tool, a cradle 77, and an operating unit 71. The blade 78 includes a U-shaped blade edge 780 provided at its lower end, and a pressing surface 781 provided inside the blade edge 780 so as to retreat upward from the blade edge 780 . The pressing surface 781 has a horizontal first surface portion 781a and an inclined second surface portion 781b provided on one side of the horizontal surface portion 781a.

17B is a plan view of the cradle 77 of FIG. 17A. The recess 770 of the cradle 77 of this embodiment has an inner peripheral surface with the same contour as the U-shape of the cutting edge 780 to receive the cutting edge 780 . The cradle 77 faces the blade 78 in the vertical direction Y at the position of the recess 770 .

Components

10 , 11 , 20 / 21 are conveyed intermittently so as to pass between blade 78 and cradle 77 .

The operating unit 71 of the embodiment moves the cutting tool 78 in the vertical direction Y with respect to the cradle 77 to approach and separate it.

FIG. 18A is a partial plan view of the

components

10, 11, 20/21 fabricated by the temporary fastening device 7 of FIG. 17A. FIG. 18B is an enlarged sectional view taken along line TT of FIG. 18A. 17A-18B, during a temporary stop of the intermittent transport of the

webs

10, 11, the temporary fastening device 7 is moved by the actuation unit 71 in the downward direction Y1 toward the cradle 77. Let As a result, the temporary fastening device 7 cuts the

laminated panel members

10, 11 and bottom member 20/side gusset member 21 with a U-shaped blade 78 to form a tongue portion 82 (see FIGS. 18A and 18B). , formed from these

components

10, 11, 20/21. Further, the temporary fastening device 7 further moves the blade 78 in the downward direction Y1 to press the tongue portion 82 against the concave portion 770 with the pressing surface 781 (the first surface portion 781a), thereby connecting the

components

10, 11, 20/21. is displaced in the downward direction Y1. At this time, the tongue portion 82 is bent downward Y1 by the second surface 781b at its base 820 (FIG. 18B). The temporary fastening device 7 then moves the cutting tool 78 upward by the operation unit 71 and retracts it from the cradle 77 .

This causes the

components

10, 11, 20/21 to closely engage each other at the tongue portion 82, as shown in Figure 18B. The tongue portion 82 thus provides a temporary fastening between the

components

10, 11, 20/21.

This temporary fixing is possible by establishing the relationship f>g>h. Here, f is the depth of the recess 770, and g is the distance between the cutting edge 780 and the pressing surface 781 (first surface portion 781a), as shown in FIG. 17A. and h is the laminate thickness of the

cut components

10, 11, 20/21, as shown in FIG. 18B.

The region containing this tongue portion 82 may be subsequently removed by cutting, such as cross-cutting or slitting, so that the bag 6 does not have the tongue portion 82 . Also, a joining device (longitudinal or transverse sealing device) heat seals the

components

10, 11, 20/21 in the region including the tongue portion 82, and the

components

10, 11, fused by the heat sealing A 20/21 material (resin) may fill the U-shaped notch. That is, the tongue portion 82 may be connected to the

components

10, 11, 20/21 with a melted material to obscure the cut marks.

In each embodiment, the tacking prevents the

panel members

10, 11 from being displaced longitudinally and widthwise with respect to other components until these components are joined (heat sealed). The process itself is the same as in Patent Document 1.

However, as described above, the present application provides a new type of tacking that is local deformation of the components in the stacking direction Y1 using a processing tool instead of the heat sealing or ultrasonic type.

Temporary fastening by local deformation of components does not require the use of heat unlike conventional heat sealing or ultrasonic sealing, and can be implemented relatively easily. Temporary fastening by heat sealing or ultrasonic sealing is subject to restrictions on the materials of components because heat is used, but temporary fastening by local deformation of the components is less subject to such restrictions.

The temporary retaining device 7 of each embodiment can be prepared relatively inexpensively compared to heat-sealing or ultrasonic temporary retaining devices. It is also possible to inexpensively incorporate the temporary fastening device into an existing bag-making machine. Such a temporary retaining device 7 can be easily made compact and can contribute to improvement of space efficiency. The exemplary temporary tacking devices 7 other than those shown in FIGS. 7 and 14 require only a short time for one temporary tacking operation, which can contribute to the improvement of bag-making efficiency.

A person skilled in the art will easily understand that the temporary fastening of the above embodiment using a processing tool can be used for various types of bag making.

10, 11 Corrugated material (component)
20 Bottom material (component)
21 side gusset material (component)
43 Conveying device 50 Cross cutting device 7 Temporary fastening device 70 Needle (processing tool)
71 Actuating unit 72 Rotating body 76 Push tool (processing tool)
77 cradle 770 recess 78 blade (processing tool)
780 cutting edge 781 pressing surface 80 hole 81 formed by needle embossed portion 82 tongue portion Y (Y1) stacking direction

Claims

A bag making machine for manufacturing a bag using a plurality of components including at least two web-like panel members,
a conveying device for conveying the panel material in the longitudinal direction of the panel material;
a temporary fastening device that temporarily fastens a first component and a second component among the plurality of components to each other;
a joining device that is provided downstream from the temporary fastening device and joins the first and second components to each other;
a cross-cutting device provided downstream from the joining device for cross-cutting the panel material in the width direction of the panel material to manufacture the bag;
The temporary retaining device is
a processing tool for deforming the first and second components;
The first and second components stacked together are locally deformed in the stacking direction by the processing tool so that the deformed portions engage with each other;
A bag making machine characterized by:
The temporary retaining device is
at least one needle as the processing tool;
During pauses in the intermittent transport of the web, the needles are pierced through the first and second components to pierce the first and second components in the stacking direction at the edges of the holes formed. a bending actuation unit;
The bag making machine according to claim 1.
The temporary retaining device is
a plurality of needles as the processing tool;
a rotating body having the needle provided on its outer peripheral surface,
As the body of rotation rotates as the panel material is conveyed, the first and second components are pierced by the needles, and edges of the formed holes are curved in the stacking direction.
The bag making machine according to claim 1.
The joining device heat seals the first and second components in a region including the hole, and fills the hole with the material of the component melted by heat sealing.
The bag making machine according to claim 2 or 3.
The temporary retaining device is
a stamping die as the processing tool;
a cradle having a recess for receiving the stamp;
During a temporary stop of the intermittent conveyance of the panel material, the stamping die is moved to the cradle, and the first and second components are sandwiched between the stamping die and the recess in the stacking direction. an actuation unit embossed on
The bag making machine according to claim 1.
The temporary retaining device is
a cutting tool as the processing tool including a U-shaped cutting edge and a pressing surface provided inside the cutting edge at a position retracted from the cutting edge;
a cradle having a recess for receiving the cutting edge;
During a pause in intermittent conveying of the web, the knife is moved to the cradle to cut the first and second components with the knife edge to form a tongue portion, and an operating unit that presses against the concave portion by the pressing surface to displace the tongue portion in the stacking direction,
The bag making machine according to claim 1.
The joining device heat seals the first and second components in a region including the tongue portion, and fills the U-shaped cut with the material of the components melted by heat sealing.
The bag making machine according to claim 6.
The temporary retaining device is
deforming the first and second components in areas removed as margins during crosscutting by the crosscutting device;
The bag making machine according to any one of claims 1 to 7.
A bag making method for manufacturing a bag using a plurality of components including at least two web-shaped panel members, comprising:
conveying the web in the longitudinal direction of the web;
tacking together a first component and a second component of the plurality of components;
joining the first and second components together after tacking; and
cross-cutting the web across the width of the web after bonding to produce a bag;
Tentatively:
locally deforming the first and second components stacked together in the stacking direction by a processing tool so that the deformed portions engage with each other;
A bag-making method characterized by:
The processing tool is
at least one needle for piercing said first and second components;
a die for embossing said first and second components; and
a knife for cutting the first and second components into a U-shape;
The bag-making method according to claim 9.
wherein the first component is the panel material;
wherein the second component is a sole material;
The bag-making method according to claim 9 or 10.
wherein the first component is the panel material;
wherein the second component is a side gusset material;
The bag-making method according to claim 9 or 10.
said first component being one of said panel members;
wherein the second component is the other panel material;
The bag-making method according to claim 9 or 10.
the first and second components are heat-sealed in an area containing the deformed portion;
The bag-making method according to any one of claims 9 to 13.
removing regions of the first and second components that include the deformed portion to produce a bag that does not include the deformed portion;
The bag-making method according to any one of claims 9 to 13.