JP7024297B2 - Purse bag manufacturing equipment and manufacturing method - Google Patents

Description

The present invention relates to a drawstring bag manufacturing apparatus and a drawstring bag manufacturing method configured so that the opening can be squeezed by a drawstring string.

Conventionally, the configuration disclosed in Patent Document 1 as a drawstring bag is known. This drawstring bag is configured by inserting an upper band-shaped closure (string) and a lower band-shaped closure (string) into a tubular insertion portion formed at the edge of the opening of the bag-shaped container body. .. The upper band closure and the lower band closure are pulled out from the insertion portion in opposite directions, thereby narrowing the opening.

Japanese Unexamined Patent Publication No. 2001-192043

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 that the opening is smoothed. There is a problem that it cannot be squeezed and it is difficult to close the opening tightly.

It is an object of the present invention to provide an apparatus and a manufacturing method for manufacturing a drawstring bag capable of smoothly squeezing an opening and firmly closing the opening.

The device for manufacturing a drawstring bag according to the present invention introduces a pair of drawstrings into the cord passage by guiding the folding means for folding the raw sheet to form the cord passage and the drawstring held in the cord supply unit. The introduction means is provided with an introduction means for adhering the drawstring introduced in the string passage to the end of the string passage, and the introduction means is a pair of guide bars provided with a guide portion for guiding the drawstring. It has a guide bar moving means for moving the pair of guide bars in a direction intersecting the transport direction of the raw sheet, and the pair of guide bars are moved in a state where each drawstring is adhered to the end of the string passage. It is characterized in that each drawstring is crossed in the cord passage by exchanging the positions of the guide portions of the guide bars in the width direction of the original fabric sheet.

The drawstring bag manufacturing device is provided with, for example, a transport means for pulling out the raw fabric sheet from the raw fabric roll and transporting the drawstring bag, the folding means for folding the raw fabric sheet while the raw fabric sheet is being conveyed, and the introducing means for bonding. It is provided on the upstream side in the transport direction by the transport means rather than the means.

According to the present invention, it is possible to obtain an apparatus and a manufacturing method for manufacturing a drawstring bag capable of smoothly narrowing the opening and firmly closing the opening.

It is a perspective view which shows the folding mechanism which is provided in the purse bag manufacturing apparatus which is one Embodiment of this invention, and forms the string passage in the raw sheet. It is a front view which shows the folding mechanism. It is a side view which shows the folding mechanism. It is a figure which shows the action of folding a raw sheet 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 top view which shows the drawstring bag. It is a figure which shows the state which the drawing string guided in the string passage by the 1st and 2nd guide bars is parallel. It is a figure which shows the state which the drawing string guided in the string passage by the 1st and 2nd guide bars intersects. It is a figure which shows the drawing string inserted in the string passage.

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

FIGS. 1 to 3 show a folding mechanism (folding means) 10 in which one end of the raw sheet S is folded in an M shape to form a string passage. The raw sheet S is a resin sheet, is drawn out horizontally from the raw sheet roll R, is turned diagonally downward by the support roller 11, and is sent to the folding mechanism 10. A pair of feed rollers 12 for pulling out the raw sheet S downward is provided below the folding mechanism 10, and the feed rollers 12 are rotationally driven by the motor 15. The winding core 13 of the original roll R is connected to the output shaft of the motor 14. Tension for applying tension to the raw sheet S so that the raw sheet S does not loosen even if a speed difference between the motor 14 and the motor 15 occurs between the support roller 11 and the winding core 13. Rollers are placed.

A perforated 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 the inner folding line L, which is the center line in the longitudinal direction of the raw sheet S, and the raw sheet S moves along the support roller 11 to form a perforation on the inner folding line L. do. The original sheet S is set so that the inner folding line L is aligned with the center position of the folding mechanism 10, that is, between the pair of rod-shaped 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-shaped members 17 extending in the horizontal direction orthogonal to the support roller 11 and a two-fold guide 18. The pair of rod-shaped members 17 are provided with a gap through which the folded raw sheet S can pass, and do not rotate. The two-fold guide 18 has a central guide 18a located directly above the rod-shaped member 17, and a pair of plate-shaped 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 edge portion of the pair of side guides 18b and the central guide 18a is narrowed downward, and the lower edge portion 18c of the central guide 18a is horizontal.

An M-shaped folding guide 16 (not shown in FIG. 1) is provided below the two-folding guide 18. As shown in FIG. 3, the two-fold guide 18 is inclined, and the M-fold guide 16 is provided in the vicinity of the lower edge portion 18c of the central guide 18a. The M-fold guide 16 extends substantially perpendicular 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 tip 16a of the M-shaped folding guide 16 forms an acute angle and engages with the inner folding line L of the raw sheet S. The original sheet S is conveyed by sliding on the upper surface of the two-fold guide 18, and is passed between the pair of rod-shaped members 17 with the inner folding line L folded inward by the tip of the M-shaped folding guide 16. Folds in two.

FIG. 4 shows the action of folding the raw sheet S by the folding mechanism 10, and is a view of the folding mechanism 10 seen from above in FIG. 1. As shown in FIG. 4, the raw sheet S is folded inward at the inner folding line L, and is mountain-folded at the outer folding lines M1 and M2 extending in parallel on both sides of the inner folding line L. A pair of string passages P1 and P2 are formed on the inside. In the following description, the region between the inner folding line L and the outer folding lines M1 and M2 of the original sheet S is referred to as a folding portion N.

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

The tab forming mechanism 30 is provided on the downstream side of the feed roller 12 (see FIG. 1), and a perforation is made in the folding portion N (see FIG. 1) to form the first and second tabs T1 and T2. These tabs T1 and T2 are rectangles along the longitudinal direction of the raw sheet S, and one side of each rectangle corresponds to the outer folding lines M1 and M2. Further, these tabs T1 and T2 are adjacent to each other, and are separated by cutting the raw sheet S by the cutter 44 described later. By this cutting, a drawstring bag G (see FIG. 6) is formed, the first tab T1 becomes a part of the drawstring bag G adjacent to the upstream side, and the second tab T2 is one of the drawstring bags G adjacent to the downstream side. It becomes a department. That is, the tab forming mechanism 30 simultaneously forms the first tab T1 of the drawstring bag G on the upstream side and the second tab T2 of the drawstring bag G on the downstream side.

The first and second guide bars (introduction means) 31 and 32 are provided on the downstream side of the tab forming mechanism 30. The guide bars 31 and 32 are located immediately upstream of the tabs T1 and T2 located one pitch downstream from the tab forming mechanism 30. The guide bars 31 and 32 extend in a direction intersecting the transport direction (X direction) of the raw sheet S, and a through hole (guide portion) 33 for guiding the drawstring H is provided at the tip of each guide bar 31 and 32. , 34 are provided. The guide bars 31 and 32 are driven by the guide bar moving mechanism (guide bar moving means) 35, and can move forward and backward in the width direction of the original sheet S.

A pair of bobbins (string supply portions) 36, 37 are provided on the side of the guide bar moving mechanism 35. A drawstring H is wound and held around the bobbins 36 and 37, respectively, and the drawstring H is unwound 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, respectively. Will be done. As will be described later, the drawstring H intersects in the cord passages P1 and P2 (see FIG. 4) and extends downstream.

FIG. 5 shows guide bars 31, 32, a guide bar moving mechanism 35, and bobbins 36, 37 for inserting the drawstring H into the string passage P1 (see FIG. 4) located on the upper side of the raw sheet S. However, in order to insert the drawstring H into the cord passage P2 (see FIG. 4) located below the original sheet S, a similar configuration is provided below the guide bars 31, 32 and the like.

A vertical seal heat sealer 40 is provided on the downstream side of the guide bars 31 and 32. The vertical seal heat sealer 40 extends in the transport direction of the raw sheet S, and at the folding portion N, heat welds between the inner folding line L (see FIG. 1) and the outer folding lines M1 and M2, whereby the string passage P1 and P2 (see FIG. 4) is formed on the outer folding lines M1 and M2 side in the raw sheet S.

On the downstream side of the vertical seal heat sealer 40, an adhesive mechanism (adhesive means) 41 for heat-welding the tabs T1 and T2 and their vicinity to fix the drawstring H to the raw sheet S is provided. The bonding mechanism 41 is located one pitch downstream from the tabs T1 and T2 located immediately downstream of the guide bars 31 and 32. As will be described later, with the pair of drawstrings H fixed to the raw sheet S by the adhesive mechanism 41, the first and second guide bars 31 and 32 provided on the upstream side of the adhesive mechanism 41 act. As a result, the pair of drawstrings H change from the parallel state to the crossed state.

A sheet feed chuck (transporting means) 42 is provided on the downstream side of the bonding mechanism 41. The sheet feed chuck 42 extends in the width direction of the raw sheet S, sandwiches the raw sheet S up and down, conveys the raw sheet S one pitch in the direction of arrow X, opens it, and retracts in the direction opposite to the arrow X. .. By repeating this operation, the sheet feed chuck 42 pulls out the raw sheet S from the raw sheet roll R (see FIG. 1) and conveys it. Although only one sheet feed chuck 42 is shown in FIG. 5, in reality, sheet feed chucks having the same structure are provided on the upstream side and the downstream side of the sheet feed chuck 42. These sheet feed chucks are driven synchronously, and a predetermined tension is applied to the raw sheet S.

A horizontal seal heat sealer 43 is provided on the downstream side of the sheet feed chuck 42. The lateral seal heat sealer 43 is provided at a position where the tabs T1 and T2 are stopped, and extends over the entire width of the raw sheet S. The horizontal seal heat sealer 43 heats the raw fabric sheet S by sandwiching the raw fabric sheet S vertically, and heat-welds the raw fabric sheet S along a straight line passing between two adjacent tabs 1 and T2T.

A cutter 44 is provided on the downstream side of the lateral seal heat sealer 43. The cutter 44 is provided at a position where the tabs T1 and T2 stop, and extends over the entire width of the raw sheet S. The cutter 44 cuts the raw sheet S along a straight line passing between two adjacent tabs T, whereby a drawstring bag G is obtained.

A support member (not shown) is appropriately arranged on the lower side of the raw fabric sheet S so that the raw fabric sheet S does not bend significantly.

FIG. 6 shows a drawstring bag G manufactured by the manufacturing apparatus and manufacturing method of the present embodiment. FIG. 6 is a plan view of the drawstring bag G, and of the pair of string passages P1 and P2, only the string passage P1 located on the front side is shown. Since the string passage P2 located on the back side has the same configuration, the description thereof will be omitted. In FIG. 6, the string passage P1 is located above the drawstring bag G, and the lower edge portion F of the drawstring bag G is an opening. The vertical seal portion V heat-welded by the vertical seal heat sealer 40 is the edge portion of the string passage P1, and the drawstring bag G is divided into the string passage P1 and the accommodating portion Q. The horizontal seal portion W heat-welded by the horizontal 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 drawstrings H are inserted into the string passage P1 in a state where they intersect each other. Each drawstring H is heat-welded and fixed to both ends of the cord passage P1 by an adhesive mechanism 41. Of the adhesive portion J to which the drawstring H is fixed, tabs T1 and T2 are provided at a portion close to the outer folding line M1, and the drawstring H is fixed to the tabs T1 and T2, respectively. Specifically, at the downstream end of the string passage P1, one drawstring H is fixed to the first tab T1 and the other drawstring H is fixed to the outer adhesive portion J of the first tab T1. At the upstream end of the string passage P1, the other drawstring H is fixed to the second tab T2 and one drawstring H is fixed to the outer adhesive portion J of the second tab T2.

With reference to FIGS. 7 and 8, the action of the first and second guide bars 31 and 32 to cross the drawstring H in the cord passage P1 will be described. The tips of the first and second guide bars 31 and 32 are inserted into the upper string passage P1 of the pair of string passages P1 and P2. A folding guide 38 is engaged between the string passages P1 and P2. The folding guide 38 extends from the first and second guide bars 31 and 32 to the bonding mechanism 41 along the raw sheet S, and maintains the M-shaped folded state of the raw sheet S.

The drawstring H unwound from the bobbins 36 and 37 (see FIG. 5) is guided to the first and second guide bars 31 and 32 via the guides 45 and 46, and passes through the through holes 33 and 34 to the string passage P1. It is inserted inside. In FIG. 7, the pair of drawstrings H are parallel to each other, and the through hole 33 of the first guide bar 31 is relatively closer to the outer folding line M1 than the through hole 34 of the second guide bar 32. Therefore, the drawstring H guided by the first guide bar 31 passes through the tabs T1 and T2, and the drawstring H guided by the second guide bar 32 passes outside the tabs T1 and T2. In this state, the tabs T1 and T2 and their vicinity are already heat-welded by the bonding mechanism 41. That is, the drawstring H guided by the first guide bar 31 is fixed to the tabs T1 and T2, and the drawstring H guided by the second guide bar 32 is fixed to the outside of the tabs T1 and T2.

It is preferable that the drawstring H passes through the through holes 33 and 34 from the top to the bottom of the first and second guide bars 31 and 32. The drawstring H passing through the through hole 34 of the guide bar 32 can pass under the guide bar 31 and extend in the transport direction, whereby there is a possibility of entanglement in the operation of crossing the pair of drawstrings H. Can be reduced.

In the state shown in FIG. 7, the guide bar moving mechanism 35 is driven while the raw sheet S is conveyed by one pitch, the first guide bar 31 is retracted, and the second guide bar 32 is advanced. As a result, as shown in FIG. 8, the through hole 34 of the second guide bar 32 is defined closer to the outer folding line M1 than the through hole 33 of the first guide bar 31, and the pair of drawstrings H Cross in the string passage P1.

The operation of this embodiment will be described. Each of the following steps is executed while the raw sheet S is being conveyed or stopped.

The raw sheet S drawn from the raw roll R is folded in the folding step executed by the folding mechanism 10, and the string passages P1 and P2 are formed. In the introduction step, the pair of drawstrings H are guided through the first and second guide bars 31 and 32 and introduced into the string passages P1 and P2. In the bonding step, the pair of drawstrings H introduced into the string passages P1 and P2 are bonded to the ends of the string passages P1 and P2 (the portion corresponding to the tab T) by the bonding mechanism 41. Further, in the bonding step, the vertical seal heat sealer 40 heat-welds between the inner folding lines L and the outer folding lines M1 and M2 to form the vertical sealing portion V.

Immediately after the bonding step, the drawstring H guided via the first guide bar 31 is located close to the outer folding lines M1 and M2 as shown in FIG. 9A, and is inside the cord passages P1 and P2. In, the pair of drawstrings H are in a parallel state. After that, the guide bar moving mechanism 35 operates to move the first and second guide bars 31 and 32 in the direction intersecting the transport direction of the raw sheet S to replace the positions of the through holes 33 and 34, whereby the positions of the through holes 33 and 34 are exchanged. , Each drawstring H intersects in the string passages P1 and P2 in a state of being adhered to the ends of the string passages P1 and P2.

After that, the raw fabric sheet S is conveyed to the downstream side by one pitch, and when the portions corresponding to the next tabs T1 and T2 are bonded by the adhesive mechanism 41, both ends of the pair of crossed drawstrings H are bonded to the raw fabric sheet S. Will be fixed to. The raw fabric sheet S is further transported to the downstream side, and the raw fabric sheet S is heat-welded by the horizontal seal heat sealer 43 to form the horizontal seal portion W. After that, the raw sheet S is further conveyed to the downstream side by one pitch, and the cutting step is executed by the cutter 44. That is, at the ends of the string passages P1 and P2, the raw fabric sheet S and the drawstring string H are cut to obtain a drawstring bag G.

As shown in FIG. 9B, the drawstring bag G has an open edge F on the side opposite to the string passages P1 and P2, and in the next step, articles are stored in the storage portion Q from the edge F. And the edge F is sealed. The step of accommodating the article in the accommodating portion Q may be executed before the cutting step by the cutter 44.

As can be seen from FIG. 6, in the drawstring bag G obtained by the manufacturing apparatus or manufacturing method of the present embodiment, a pair of drawstring strings H intersect in the string passage P1. In the work of squeezing the openings (parts of the string passages P1 and P2) of the drawstring bag G with the article stored in the storage portion Q and the edge F sealed, first, the tabs T at both corners of the drawstring bag G are used. Cut along the perforations. Then, the pair of drawstrings H may be pulled out by pulling the two tabs T to the outside to bind the opening of the drawstring bag G.

In the work of squeezing the opening of the drawstring bag G as described above, since the pair of drawstring strings H intersect each other, moments in opposite directions act on the drawstring bag G. Therefore, the drawstring bag G does not tilt, the opening can be squeezed smoothly, and the opening can be closed tightly.

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 raw sheet S by heat welding. It is also possible to adopt a sonic seal.

10 Folding mechanism (folding means)
31 First guide bar (introduction means)
32 Second guide bar (introduction means)
33, 34 Through hole (guide part)
35 Guide bar moving mechanism (guide bar moving means)
36, 37 bobbins (string supply section)
41 Adhesive mechanism (adhesive means)
H Draw string P1, P2 String passage R Original fabric roller S Original fabric sheet

Claims (2)

Folding means to fold the raw sheet to form a string passage,
An introduction means for guiding a drawstring held in the string supply unit and introducing a pair of drawstrings into the string passage, and
It is provided with an adhesive means for adhering the drawstring introduced into the string passage to the end of the string passage.
The introduction means includes a pair of guide bars provided with a guide portion for guiding the drawstring, and a guide bar moving means for moving the pair of guide bars in a direction intersecting the transport direction of the raw sheet. In a state where each drawstring is adhered to the end of the string passage, the pair of guide bars are moved to replace the positions of the guide bars of the guide bars in the width direction of the original sheet. A purse bag manufacturing device characterized in that each of the drawstrings is crossed in a string passage. A transport means for pulling out the raw sheet from the raw roll and transporting the raw sheet is provided.
The folding means is characterized in that the raw fabric sheet is folded while the raw fabric sheet is being conveyed, and the introducing means is provided on the upstream side in the conveying direction by the conveying means with respect to the adhesive means. Item 1. The purse bag manufacturing apparatus according to item 1.

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