JP2019064212A - Manufacturing device and manufacturing method of drawstring bag - Google Patents

Abstract

To provide a manufacturing device and a manufacturing method of a drawstring bag capable of drawing an opening part smoothly, and also closing the opening part firmly.SOLUTION: A folding mechanism folds a raw material sheet S to form string paths. A tab forming mechanism 30 forms tabs TA1, TA2, TB1, TB2, which can be cut off along cut lines from the raw material sheet S. Guide bars 31, 32 guide insertion of a pair of drawing strings H into the respective string paths. The raw material sheet S, sandwiched between a separated tab chuck 52 and a remaining tab chuck 53, is cut between the tabs TA1, TA2, and between the tabs TB1, TB2 by a tab cutter. The separated tab chuck 52 is descended to draw a predetermined length of each drawing string H, while separating the to-be-separated tabs TB1, TB2 from the raw material sheet S. An adhesion mechanism 41 adheres the drawing strings H to end parts of the string path.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a device for manufacturing a drawstring bag and a method for manufacturing a drawstring bag, which are configured to be able to squeeze an opening with a drawstring.

  Conventionally, a configuration disclosed in Patent Document 1 is known as a drawstring bag. The drawstring bag is configured by inserting an upper band-shaped closure (string) and a lower band-shaped closure (string) into a cylindrical insertion part formed at the edge of the opening of the bag-like container main body. . The upper closure and the lower closure are drawn from the insertion part in opposite directions from one another, whereby the opening is narrowed.

JP 2001-192043 A

  According to such a conventional configuration, in the operation of squeezing the opening, the upper band-shaped closing tool and the lower band-shaped closing tool are pulled out in opposite directions, so that a rotational moment acts on the drawstring bag, so the opening is smoothed. In addition, there is a problem that it is difficult to tightly close the opening.

  An object of the present invention is to provide an apparatus and a method for manufacturing a drawstring bag which can squeeze the opening smoothly and can be tightly closed.

  The apparatus for manufacturing a drawstring bag according to the present invention comprises: conveying means for pulling out and conveying an original sheet from an original roll, folding means for folding the original sheet to form a string passage, and an original sheet with a cutting line A tab forming means for forming a tab that can be cut along, an introducing means for guiding the squeeze cord held by the cord supply unit and introducing it into the cord passage, and a first bonding means for bonding the squeeze cord to the tab; By moving in a direction crossing the conveyance direction of the original sheet while holding the tab to which the drawstrings are adhered, the tab for pulling out the drawstring of a predetermined length from the cord supply portion while separating the tab from the original sheet A separating means and a second bonding means for bonding the raw fabric sheet and the drawstring in a portion on the upstream side of the portion where the tab of the raw fabric sheet is formed are characterized.

The method for manufacturing a drawstring bag according to the present invention comprises: a conveying step of pulling out and conveying an original sheet from an original roll, a folding step of folding the original sheet to form a string passage, and a cutting line in the original sheet. Forming a tab along which the tab is cuttable;
An introduction step of guiding the drawn string held by the cord supply unit and introducing it into the cord passage, a first bonding step of adhering the drawn string introduced into the cord passage to the tab, and a tab to which the drawn string is adhered And separating the tabs from the original sheet by moving in a direction crossing the conveyance direction of the original sheet while separating the tabs from the original sheet and pulling out a drawn string of a predetermined length from the cord supply section; And a second bonding step of bonding the raw fabric sheet and the squeezed cord at a portion upstream of the portion where the tab is formed.

  According to the present invention, it is possible to obtain an apparatus and a method for manufacturing a drawstring bag which can squeeze the opening smoothly and can be tightly closed.

It is a perspective view which is provided in a manufacturing apparatus of a drawstring bag which is one embodiment of the present invention, and shows a folding mechanism which forms a string passage in an original fabric sheet. It is a front view which shows a folding mechanism. It is a side view showing a folding mechanism. It is a figure which shows the effect | action which folds an original fabric sheet | seat by a folding mechanism. It is a perspective view which shows the schematic structure of the manufacturing apparatus of a drawstring bag. It is a figure for demonstrating the effect | action which cut | disconnects a tab by a tab cutter. It is a top view showing a drawstring bag. It is a sectional view showing the string passage where a drawstring was inserted. FIG. 6 shows a configuration for driving a tab cutter, a separation tab chuck and a residual tab chuck.

  The invention will now be described with reference to the illustrated embodiments. The drawstring bag produced by the production apparatus and production method of the present embodiment is a semi-finished product, and one end is folded in an M shape to form a string passage, and the squeeze string is inserted through the string passage, and the other end Is conveyed to the next step with the open state, and the article is accommodated from the opening at the other end in the next step.

  FIGS. 1 to 3 show a folding mechanism (folding means) 10 that folds one end of an original sheet S into an M shape to form a string passage. The raw sheet S is a resin sheet and is pulled out from the raw roll R in the horizontal direction, turned obliquely downward at the support roller 11 and fed to the folding mechanism 10. Below the folding mechanism 10, a pair of feed rollers 12 for drawing the original sheet S downward is provided, and the feed rollers 12 are rotationally driven by a motor 15. The winding core 13 of the material roll R is connected to the output shaft of the motor 14. A tension for applying tension to the original sheet S so that the original sheet S is not loosened even if a difference in speed between the motor 14 and the motor 15 occurs between the support roller 11 and the winding core 13 A roller is arranged.

  A perforation cutter 20 is provided above the support roller 11. The perforation cutter 20 is rotationally driven by a motor (not shown) and rotates in conjunction with the feed roller 12. The perforation cutter 20 abuts on an inner folding line L which is a longitudinal center line of the original sheet S, and the original sheet S moves along the support roller 11 to form a perforation in the inner folding line L. Do. The original sheet S is determined so that the inner folding line L coincides with the central position of the folding mechanism 10, that is, between a pair of rod-like members 17 described later, and is fed to the folding mechanism 10.

  The folding mechanism 10 is located below the support roller 11 and has a pair of rod-like members 17 extending in the horizontal direction perpendicular to the support roller 11 and a folding guide 18. The pair of rod-like members 17 is provided with a gap through which the folded original sheet S can pass, and does not rotate. The two-folded guide 18 has a central guide 18a located immediately above the rod member 17 and a pair of plate-like side guides 18b whose lower ends are close to the central guide 18a and extend toward the end of the support roller 11. . As shown in FIG. 2, when viewed from the front, the outer edges of the pair of side guides 18b and the central guide 18a converge downward, and the lower edge 18c of the central guide 18a is horizontal.

  Below the double-folding guide 18, an M-shaped folding guide 16 (not shown in FIG. 1) is provided. As shown in FIG. 3, the folding guide 18 is inclined, and the M-shaped folding guide 16 is provided near the lower edge 18c of the central guide 18a. The M-fold guide 16 extends substantially perpendicularly to the two-fold guide 18, and the lower end of the M-fold guide 16 is located below the two-fold guide 18. The leading end 16 a of the M-shaped folding guide 16 forms an acute angle, and engages with the inner folding line L of the original sheet S. The original sheet S is conveyed in sliding contact with the upper surface of the two-folded guide 18, and passes between the pair of rod-like members 17 in a state where the inner folding line L is folded inward by the tip of the M-shaped folded guide 16. , Folded in two.

  FIG. 4 shows an operation of folding the original sheet S by the folding mechanism 10, and is a view of the folding mechanism 10 as viewed from above in FIG. As shown in FIG. 4, the original sheet S is folded inward at the inner fold line L, and is mountain-folded at the outer fold lines M1 and M2 extending in parallel on both sides of the inner fold line L. A pair of string passages P1 and P2 are formed inside. In the following description, a region between the inner folding line L of the original sheet S and the outer folding lines M1 and M2 is referred to as a folding portion N.

  FIG. 5 is a schematic configuration of a manufacturing apparatus for introducing the squeezed string H into the string passages P1 and P2 (see FIG. 4) of the original sheet S and cutting the original sheet S to form a drawstring bag. Is shown. The conveyance direction of the original sheet S is converted to the horizontal direction by the feed roller 12 (see FIG. 1), and the original sheet S is intermittently conveyed by one pitch in the arrow X direction by a sheet feed chuck (conveying means) 42 described later. Be done. The length of one pitch is equal to the distance between the transverse seal heat sealer 43 and the cutter 44 in FIG.

  The tab forming mechanism (tab forming means) 30 is provided on the downstream side of the feed roller 12 (see FIG. 1), and has perforations (cut lines) in the folded portion N (see FIG. 1) to form four tabs TA1, TA2, Form TB1 and TB2. These tabs TA 1, TA 2, TB 1, and TB 2 are rectangular having the same size, and a first dividing line T 1 (perforation) orthogonal to the conveyance direction of the original sheet S and a parallel to the conveyance direction (X direction) It is mutually divided by two division line T2 (perforation). One side of each rectangle of the two tabs TA1 and TB1 located on the outer edge side of the original sheet S coincides with the outer folding line M1 and M2. That is, the contour of each tab is formed by perforations except for the outer fold lines M1, M2.

  Among the four tabs, the tabs TA1 and TA2 and the tabs TB1 and TB2 are cut at the first dividing line T1 by the tab cutter 51 (see FIG. 6) described later, and the tabs TA1 and TA2 are adjacent to the downstream side with the drawstring bag G The tabs TB1 and TB2 become parts of the drawstring bag G adjacent on the upstream side. That is, the tab forming mechanism 30 simultaneously forms the tabs TA1 and TA2 of the upstream side drawstring bag G and the tabs TB1 and TB2 of the downstream side drawstring bag G.

  On the downstream side of the tab forming mechanism 30, first and second guide bars (introducing means) 31 and 32 are provided. The guide bars 31 and 32 are located immediately upstream of the tabs TA1 and TA2 and the tabs TB1 and TB2 located one pitch downstream of the tab forming mechanism 30. The guide bars 31 and 32 extend in the width direction of the original sheet S, and through holes (guide portions) 33 and 34 for guiding the squeeze string H are provided at the tips of the guide bars 31 and 32, respectively.

  The guide bars 31 and 32 are supported by the guide bar support mechanism 35 and extend in the horizontal direction, and a pair of bobbins (cord supply parts) 36 and 37 are provided on the side of the guide bar support mechanism 35. A drawstring H is wound and held by the bobbins 36 and 37 respectively, and the drawstring H is drawn from the bobbins 36 and 37 and passes through the through holes 33 and 34 of the first and second guide bars 31 and 32. Be done. The drawstrings H extend parallel to one another in the string paths P1, P2 (see FIG. 4).

  FIG. 5 shows the guide bars 31 and 32, the guide bar moving mechanism 35, and the bobbins 36 and 37 for inserting the squeeze string H into the string passage P1 (see FIG. 4) located above the original sheet S. However, in order to insert the squeeze string H into the string passage P2 (see FIG. 4) positioned below the original sheet S, a similar configuration is provided below the guide bars 31, 32 and so forth.

  On the downstream side of the guide bars 31 and 32, there is provided an adhesion mechanism 41 for thermally welding the tabs TA1, TA2, TB1, and TB2 and the vicinity thereof to fix the drawn string H to the original sheet S. The bonding mechanism 41 is located one pitch downstream of the tab forming mechanism 30. In the bonding mechanism 41, a portion for bonding the squeeze string H to the tabs TB1 and TB2 corresponds to a first bonding means. Further, the portion for bonding the squeezable string H to the tabs TA1 and TA2 is the raw fabric sheet S with the squeezable string H drawn by separating the tabs TB1 and TB2 from the original sheet S by the action of the separation tab chuck 52 described later. It corresponds to a second bonding means for bonding.

  A vertical seal heat sealer 40 is provided immediately downstream of the bonding mechanism 41. The vertical seal heat sealer 40 extends in the conveyance direction of the original sheet S, and heat welds between the inner fold line L (see FIG. 1) and the outer fold lines M1, M2 at the fold portion N, whereby the string passage P1, P2 (see FIG. 4) is formed on the outer folding line M1, M2 side of the raw sheet S.

  On the downstream side of the vertical seal heat sealer 40, a tab separating means having a tab cutter 51 (see FIG. 6), a separating tab chuck 52 and a residual tab chuck 53 is provided. The separation tab chuck 52 and the residual tab chuck 53 are provided along the conveyance direction of the original sheet S with a gap through which the tab cutter 51 can pass, and the separation tab chuck 52 is positioned relatively upstream. The separation tab chuck 52 and the residual tab chuck 53 sandwich the tabs TA1, TA2, TB1, TB2 from above and below, and the separation tab chuck 52 holds two tabs TB1 and TB2 positioned upstream of the four tabs, the residual tab The chuck 53 clamps the two downstream tabs TA1 and TA2.

  The operation of the tab cutter 51, the separation tab chuck 52 and the residual tab chuck 53 will be described with reference to FIG. The tab cutter 51 is located above the separation tab chuck 52 and the remaining tab chuck 53 when not in operation (FIG. 6 (a)), and is lowered to move the original web at the first dividing line T1 (see FIG. 5). The sheet S is cut (FIG. 6 (b)). This cutting operation is performed before the bonding operation by the bonding mechanism 41 (see FIG. 5), that is, in a state where the draw string H is not fixed to the original sheet S.

  Next, the separation tab chuck 52 moves downward (that is, in a direction intersecting the conveyance direction of the original sheet S) while holding the upstream two tabs TB1 and TB2. As a result, the two drawn cords H having a predetermined length are drawn from the bobbins 36 and 37 while separating the tabs from the original sheet S, and the notches C are formed in the original sheet S (FIG. 6 (FIG. c)).

  Thereafter, the adhesion mechanism 41 (see FIG. 5) is activated, and the tabs TA1, TA2, TB1, TB2 and their vicinity located one pitch upstream of the tabs TA1, TA2, TB1, TB2 cut by the tab cutter 51 are thermal A portion on the upstream side of the drawn cord H which is welded and drawn out from the raw sheet S is fixed to the end of the cord passage P1. Then, the separation tab chuck 52 is released and is retracted in the direction away from the original sheet S (FIG. 6 (d)). As a result, the tabs TB1 and TB2 and the squeezing cord H drawn from the raw sheet S hang down from the notch C of the raw sheet S.

  Referring again to FIG. 5, a transverse seal heat sealer 43 is provided downstream of the portion where the tab cutter 51, the separation tab chuck 52, and the separation tab chuck 53 are provided. The transverse seal heat sealer 43 is provided at a position at which the tabs TA1, TA2, TB1, TB2 stop, and extends over the entire width of the raw sheet S. The lateral seal heat sealer 43 heats the raw fabric sheet S by sandwiching the raw fabric sheet S up and down, and thermally welds the raw fabric sheet S along a straight line passing through the first dividing line T1.

  A sheet feeding chuck (conveying means) 42 is provided on the downstream side of the transverse seal heat sealer 43. The sheet feeding chuck 42 extends in the width direction of the original sheet S, and conveys the original sheet S one pitch in the arrow X direction sandwiching the original sheet S up and down, opens and retracts in the opposite direction to the arrow X . By repeating this operation, the sheet feeding chuck 42 draws the original sheet S from the original roll R (see FIG. 1) and conveys it.

  Although only one sheet feed chuck 42 is shown in FIG. 5, in fact, the sheet feed chuck having the same structure is provided on the upstream side and the downstream side of the sheet feed chuck 42. These sheet feed chucks are driven in synchronization to apply a predetermined tension to the original sheet S.

  A cutter (cutting means) 44 is provided downstream of the sheet feeding chuck 42. The cutter 44 is located downstream of the transverse seal heat sealer 43 by one pitch. That is, the cutter 44 is provided at a position where the tabs TA1, TA2, TB1, TB2 stop, and extends over the entire width of the raw sheet S. The cutter 44 cuts the original sheet S along a straight line passing through the first dividing line T1 between the tabs TA1 and TA2 and the tabs TB1 and TB2, whereby a drawstring bag G is obtained.

  A support member (not shown) is appropriately disposed below the original sheet S so that the original sheet S is not significantly bent.

  FIG. 7 shows a drawstring bag G manufactured by the manufacturing apparatus and manufacturing method of the present embodiment. FIG. 7 is a plan view of the drawstring bag G. Of the pair of string passages P1 and P2, only the string passage P1 located on the front side is shown. About cord passage P2 located in the back side, since it is the same composition, explanation is omitted. In FIG. 7, the string passage P1 is located above the drawstring bag G, and the lower edge F of the drawstring bag G is an opening. The vertical seal portion V thermally welded by the vertical seal heat sealer 40 is an edge portion of the string passage P1, and divides the drawstring bag G into the string passage P1 and the housing portion Q. The transverse seal portion W thermally welded by the transverse seal heat sealer 43 extends from the lower end of the string passage P1 to the opening of the lower edge of the drawstring bag G.

  A pair of throttling cords H are inserted in the cord passage P1 in parallel with each other. One end of each squeeze string H is fixed to the residual tab TA1, TA2 held by the residual tab chuck 53, and the other end is fixed to the separation tab TB1, TB2 pulled out by the separation tab chuck 52 Ru. The outer peripheral edges of the remaining tabs TA1, TA2 are perforations. The remaining tabs TA1 and TA2 are partitioned by perforations of the second dividing line T2, and the separation tabs TB1 and TB2 are also partitioned by perforations of the second dividing line T2. Therefore, when using the drawstring bag G, the end of the drawstring bag G can be squeezed by the squeeze string H, for example, by separating the separation tab TB1 and the separation tab TB2 at the second dividing line T2.

  With reference to FIG. 8, the structure which guides the squeeze string H and introduce | transduces in string passage P1, P2 is demonstrated. As shown in FIG. 8A, the leading end of the first guide bar 31 is inserted into the string passages P1 and P2, and the squeeze string H drawn out from the bobbin 36 passes through the through hole 33 of the first guide bar 31. The string passages P1 and P2 are inserted. Similarly, for the second guide bar 32 (not shown), the squeezable cord H drawn out from the bobbin 37 (not shown) is inserted into the cord passages P1 and P2. The squeezable string H introduced into the string passage P1 and P2 by the first and second guide bars 31 and 32 extends over the entire length of the string passage P1 and P2 while maintaining the parallel state as shown in FIG. Extend.

  The configuration for driving the tab cutter 51, the separation tab chuck 52, and the residual tab chuck 53 will be described with reference to FIG. The tab cutter 51 is fixed to a cutter base 55 attached to a piston rod of the cutter elevating air cylinder 54. The cutter elevating air cylinder 54 is connected via a bracket 58 to a support frame 57 extending vertically upward from the base 56. A residual tab chuck 53 is located below the tab cutter 51, and a chuck open / close air cylinder 59 for opening and closing the residual tab chuck 53 is connected to the support frame 57 via a bracket 60.

  A separation tab chuck 52 is provided adjacent to the residual tab chuck 53. A chuck open / close air cylinder 61 for opening and closing the separation tab chuck 52 is attached to the bracket 62. The bracket 62 is driven by the separation tab chuck elevating air cylinder 63 and can be moved up and down along the column 64. The column 64 is fixed to the movable table 65, and the movable table 65 is movable horizontally along a guide member 66 provided on the base 56. The moving table 65 is driven by a separation tab horizontal movement air cylinder 67 provided on the base 56.

  The tab cutter 51 is driven to move up and down by a cutter elevating air cylinder 54 to cut the original sheet S at a first dividing line T1 (see FIG. 5) of the tab. The cutting operation is performed in a state where the residual tab chuck 53 and the separation tab chuck 52 respectively sandwich the original sheet S by the chuck open / close air cylinders 59 and 61 (see FIG. 6B). After the cutting operation, the separation tab chuck 52 is lowered by the action of the separation tab chuck elevating air cylinder 63 (see FIG. 6C), and the separation tabs TB1 and TB2 (see FIG. 7) are lowered. As a result, the squeezable string H is pulled out of the original sheet S. Next, the separation tab chuck 52 is released by the chuck open / close air cylinder 61, and retracted horizontally by the separation tab horizontal movement air cylinder 67 (see FIG. 6 (d)). On the other hand, the separation tab chuck 52 is opened by the action of the chuck opening / closing air cylinder 59 when the original sheet S is conveyed, and is closed in other states to hold the original sheet S.

  The operation of this embodiment will be described. The following steps are performed while the original sheet S is conveyed or stopped.

  The raw fabric sheet S pulled out from the raw fabric roll R is folded in the folding step performed by the folding mechanism 10, and the string passages P1 and P2 are formed. In the tab forming process, perforations (cutting lines) are provided by the tab forming mechanism 30 at the folded portion N (see FIG. 1) of the raw sheet S, and the tabs TA1, TA2, TB1, and TB2 are formed. In the introduction step, the pair of squeezable cords H are guided through the first and second guide bars 31 and 32 and introduced into the cord passages P1 and P2.

  In the bonding step, the bonding mechanism 41 bonds the pair of squeezable straps H introduced into the string passages P1 and P2 to the ends (portions corresponding to the tabs TA1, TA2, TB1 and TB2) of the string passages P1 and P2. Ru. In the present embodiment, in the first bonding step in which the drawstring H is adhered to the portions of the drawstring bag G adjacent on the upstream side corresponding to the tabs TB1 and TB2, and to the tabs TA1 and TA2 of the drawstring bag G adjacent on the downstream side. Although the second bonding step to be bonded to the corresponding portion is performed simultaneously, the bonding mechanism 41 may be divided into two and the first bonding step and the second bonding step may be performed separately. After the bonding step, in the heat sealing step, the vertical seal heat sealer 40 thermally welds between the inner fold line L and the outer fold line M1, M2 to form the vertical seal portion V.

  In the tab separation step, the tab cutter 51 is lowered to cut the original sheet S at the first dividing line T1 of the tab. Thereafter, the separation tab chuck 52 is lowered to separate the separation tabs TB1 and TB2 from the original sheet S, and the two drawstrings H are pulled out from the string passage P1 while maintaining the parallel state. Then, the bonding mechanism 41 is operated, and the upstream side portion of the squeezable cord H pulled out from the raw fabric sheet S is fixed to the raw fabric sheet S. Next, the separation tab chuck 52 opens and retracts from the raw sheet S, and the separation tabs TB1 and TB2 and the squeezing cord H drawn from the raw sheet S hang down from the notch C of the raw sheet S.

  The original sheet S is conveyed to the downstream side with the separation tabs TB1 and TB2 hanging down, and is heat-welded by the transverse seal heat sealer 43 to form a transverse seal portion W. Thereafter, the raw sheet S is further conveyed downstream by one pitch, and the cutter 44 executes a cutting process. That is, the original fabric sheet S and the squeeze string H are cut at the ends of the string passages P1 and P2 to obtain the drawstring bag G.

  As the drawstring bag G is shown in FIG. 8B, the edge F on the opposite side to the string passages P1 and P2 is open, and in the next step, the articles are stored in the storage portion Q from the edge F And the edge F is sealed.

  As shown in FIG. 7, in the drawstring bag G obtained by the manufacturing apparatus or method of the present embodiment, a pair of squeeze cords H are drawn out from the string passage P1. Therefore, in the operation of narrowing the opening of the drawstring bag G (parts of the string passages P1 and P2) in a state in which the article is stored in the storage portion Q and the edge F is sealed, the separation tabs TB1 and TB2 It may be separated at T2 and the opening of the drawstring bag G may be tied with two squeeze cords H. Alternatively, the remaining tabs TA1 and TA2 may be cut from the drawstring bag G at perforations and separated at the second dividing line T2 to tie the opening of the drawstring bag G.

  As described above, in the operation of squeezing the opening of the drawstring bag G, since the pair of drawstrings H project from the drawstring bag G, the opening of the drawstring bag G can be squeezed smoothly, and the opening is firmly closed. can do.

  In the above embodiment, the vertical seal heat sealer 40, the bonding mechanism 41, and the horizontal seal heat sealer 43 are each configured to bond the original sheet S by heat welding, but instead of heat welding, the vertical seal heat sealer 40, It is also possible to employ a sonic seal.

10 Folding mechanism (folding means)
30 Tab formation mechanism (tab formation means)
31 1st guide bar (introduction means)
32 Second Guide Bar (Introduction Means)
36, 37 Bobbin (string supply unit)
41 Bonding mechanism (bonding means)
44 Cutter (cutting means)
51 Tab Cutter (Tab separation means)
52 Separation tab chuck (tab separation means)
53 Residual tab chuck (tab separation means)
H drawstring P1, P2 drawstring S original fabric sheet

Claims (2)

Transport means for pulling out and transporting the original sheet from the original roll;
Folding means for folding the original sheet to form a string passage;
A tab forming means for forming a tab which can be cut along the cutting line in the original sheet;
An introducing means for guiding the squeezed cord held by the cord supply unit and introducing it into the cord passage;
First bonding means for bonding the squeeze string to the tab;
By moving in a direction crossing the conveyance direction of the original sheet while holding the tab to which the squeezed cords are adhered, the tab is separated from the original sheet while having a predetermined length from the cord supply portion Tab separation means for pulling out the drawstring;
An apparatus for manufacturing a drawstring bag, comprising: second bonding means for bonding the raw fabric sheet and the drawstring at a portion upstream of the portion where the tab of the raw fabric sheet is formed. A conveying step of drawing out and conveying an original sheet from an original roll;
A folding step of folding the original sheet to form a string passage;
A tab forming step of forming a tab which can be cut along a cutting line in the raw sheet;
An introduction step of guiding the squeezed cord held by the cord supply unit and introducing it into the cord passage;
A first bonding step of bonding the squeeze string introduced into the string passage to the tab;
By moving in a direction crossing the conveyance direction of the original sheet while holding the tab to which the squeezed cords are adhered, the tab is separated from the original sheet while having a predetermined length from the cord supply portion Tab separation process for pulling out the drawstring,
A method of manufacturing a drawstring bag, comprising: a second bonding step of bonding the raw fabric sheet and the drawstring at a portion upstream of the portion where the tab of the raw fabric sheet is formed.

Images