JP3359392B2 - Bag body molding apparatus and method for gusset bag making with zipper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag body molding apparatus and a molding method for producing a bag body used for producing a gusset bag with a zipper in which a zipper for sealing is mounted on a gusset bag.

[0002]

2. Description of the Related Art Conventionally, a flat type having a zipper 2 as shown in FIG. 19 has been used for storing foods such as tea, coffee, candy, etc. which must be kept tightly closed because they dislike moisture. A seal bag 1 is used.

In this conventional seal bag 1 with a zipper, an upper edge portion 1a, a lower edge portion 1b, and both side edge portions 1c of two superposed sheets 1A, 1A are fused by a heat sealing method. , To seal the filled contents.

When taking out the contents, the zipper-equipped seal bag 1 is opened by cutting the lower side of the sealed upper edge 1a, and after opening, it becomes an outlet for taking out the contents by opening. The inside is sealed by a zipper 2 fused to the inner peripheral edge of the opening.

Further, as shown in FIG. 20, a fold 3A is formed on both side surfaces of the fold 3A, and when the contents are filled, the fold 3A expands to form a box-shaped container. A gusset bag 3 provided with a gusset bag is known.

[0006]

The conventional seal bag 1 with a zipper shown in FIG. 19 is widely used because it can maintain the sealing property even after opening, but the two sheet materials 1A and 1A are used.
Since it is a so-called four-sided seal bag in which 1A is overlapped and heat-sealed on its four sides, its thickness is small, its internal capacity is small, and its independence is lacking.

For this reason, a gusset bag 3 having a fold 3A as shown in FIG.
In addition, it is strongly desired that a zipper be attached so that the hermeticity can be maintained after opening.

However, the fold 3A shown in FIG.
In the case of manufacturing a gusset bag with a zipper by attaching a zipper to the gusset bag 3 having a zipper, in the manufacturing process, as shown in FIG. Since a complicated process that is not required in the manufacturing process of the conventional seal bag 1 with a zipper having a four-side seal is required, it is difficult to automate the manufacturing.

For this reason, there is conventionally no gusset bag with a zipper attached to a gusset bag having folds on the side portions as shown in FIG. 20, and as shown in FIG. Of the gusset bag 6 having the folds 6A.
The gusset bag manufactured by such a method is unsightly in appearance and easy to use. The product value was low because it was bad.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem in mounting a zipper for sealing on a gusset bag. That is, the present invention is provided for a manufacturing process of a gusset bag with a zipper, which is provided in a manufacturing process of the gusset bag with a zipper, and which automatically mounts the zipper on the gusset bag having a fold on a side surface to produce a gusset bag with a large content and self-supporting. It is an object of the present invention to provide a manufacturing apparatus and a molding method of a bag body portion of a gusset bag capable of performing the following.

[0011]

In order to achieve the above object, according to a first aspect of the present invention, a flat hollow body formed by bonding both side edges of a belt-like film material to each other is provided. Conveying means for conveying along the longitudinal direction, and a rectangular recess having a predetermined width and depth so as to form a pair at opposing positions of both side edges of the hollow body conveyed by the conveying means. Recess forming means respectively formed at predetermined intervals along the longitudinal direction, and both sides of the hollow body formed with the recess by the recess forming means are formed along the folding lines on both sides of the hollow body. By pressing in a direction perpendicular to the direction and folding inward of the hollow body until the recess is hidden, thereby forming the side edge of the hollow body as the side surface of the bag body.
And side portions forming means for forming a pleated side portion folding to be made, a hollow body pleated side portions folded on both sides is formed by the side surface portion forming means, in the longitudinal direction, the recess of the
The tip surface of the hollow body part corresponding to the formation position is
A recess in the transport direction so as to be configured as an upper part
Along the cutting line perpendicular to the transport direction at the front end position of
Cutting means for cutting to form a bag body, and said cutting means
Of the tip end surface of the bag body formed by cutting at
A zipper that allows the bag body to be opened and closed is attached to the surface
And a zipper attaching means .

In order to achieve the above object, according to a second aspect of the present invention, a flat hollow body formed by bonding both side edges of a band-shaped film material to each other is formed along a longitudinal direction thereof. By transporting the hollow body conveyed by the transport means, both sides of the hollow body are urged along the folding lines on both sides of the hollow body in a direction perpendicular to the longitudinal direction and folded inward of the hollow body. Above and below the hollow body
On the flat part of the bag body and on both sides of the hollow body,
A side portion forming means for forming a fold-shaped side portion configured as a side surface, and a hollow body having a fold-shaped side portion formed on both sides by the side portion forming means in a transport direction at predetermined intervals. Along the first cutting line perpendicular to the cutting line, cut both sides of the tip of the hollow body to the first cutting line and a predetermined length along the second cutting line parallel to the transport direction Cutting means for cutting off the front end face of the flat part and the front end part of the side face part by cutting, and cutting off a part of the fold-shaped side face part cut off from the flat face part by cutting along a second cutting line And cutting means for cutting.

[0013]

In each of the above inventions, in each case, a flat hollow body formed by bonding both side edges of a belt-shaped film material to each other is processed while conveying the conveying means along its longitudinal direction. Then, a bag main body to be subjected to a bag making process of a gusset bag with a zipper is manufactured.

That is, in the first embodiment of the present invention, in the bag making process of the gusset bag with the zipper, a side opening for inserting the zipper into the bag body is formed in the bag body. By the forming means, rectangular recesses serving as the side openings are formed at both side edges of the hollow body to be conveyed in advance. Furthermore, both sides of the hollow body having the recess formed by the side surface forming means are folded inwardly of the hollow body along the folding lines on both sides of the hollow body until the recess is hidden, and the fold-shaped side surfaces are formed on both sides. After forming the portion, the hollow body is cut at the front end position of the recess by a cutting means to produce a bag body portion.

[0015] In a second aspect of the present invention,
The side opening for inserting the zipper into the bag main body in the bag making process of the gusset bag with the zipper is formed by cutting the hollow body having the folded side surface formed by the side surface forming means at a predetermined interval by the cutting means. When cutting each time, the cutting means is further formed by cutting both sides of the hollow body by a predetermined length in parallel with the transport direction, and a part of the fold-shaped side portions separated by this cutting is It is cut off by cutting means.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a bag body forming apparatus 20 for forming a bag body 10 as shown in FIG. 2 for forming a gusset bag and attaching a zipper from a single band-shaped film.

The bag body molding apparatus 20 draws the both sides of one band-shaped film S together with the progress thereof and fuses them by the heater 21 to form the cylindrical body S.
1 is formed, and both sides of the formed cylindrical body S1 are cut into rectangular shapes at equal intervals by the cutter 22 to form recesses a facing each other. Then, both sides of the cylindrical body S1 in which the recesses a are formed are folded inward by rollers 23 arranged on both sides of the cylindrical body S1, thereby forming a fold b. FIG. 3 is an enlarged view showing a process of forming the fold b on the cylindrical body S1.

Then, the cylindrical body S1 having the folds b formed in this way is cut at the tip end of the recess a (the chain line y in FIG. 3) by the cutter 24 to form the bag body 10. As can be seen from FIG. 2, the bag body portion 10 molded as described above is formed between the flat portion 10A constituting the front and back surfaces of the gusset bag, and between both side portions of the flat portion 10A. Fold 10B, but the flat part 10
A between the side portions of the distal end surface 10a of the bag body 10 is formed with a fold 10B by a recess a formed in a molding step of the bag body 10.
Is not formed. The opening of the upper side surface of the bag body 10 in this manner is for inserting and attaching a zipper as described later.

As a method of opening the upper side surface of the bag body 10, there is a cutting method as shown in FIG. 4 in addition to the above method. This method cuts the cylindrical body S1 'on which the folds 10B' are formed at equal intervals, and at this time, cuts a part of the side of the cylindrical body S1 'continuous with the cutting line c. Cutting line d
Cut along. Then, by cutting along the cutting line d, the distal end surface 10a 'of the flat portion 10A' and the fold 10
Since the tab 10C is formed by being separated from the tip of B ', the tab 10C is connected to the flat portion 1 as shown in FIG.
By cutting along the cutting line e at the position where the leading end surface 10a 'of OA' and the tab 10C branch, the bag body 10
Is to create.

Next, the bag body 10 produced by the above-described methods is subjected to processes such as zipper mounting and sealing through the steps shown in FIGS. FIG. 6 is a plan view showing processing steps of an apparatus for performing the zipper mounting and sealing processing, and FIG. 7 is a side view showing the processing steps.

In FIGS. 6 and 7, the bag body 10 formed in the form shown in FIG. 2 is sent one by one to a processing step by a belt conveyor 30. The bag main body 10 sequentially conveyed from the right to the left in FIGS. 6 and 7 by the belt conveyor 30 is arranged such that its longitudinal direction is perpendicular to the conveying direction X of the belt conveyor 30. The flat surface 10A is conveyed in a state where the front end surface 10a protrudes to the side of the belt conveyor 30.

In the first step (FIGS. 6 (a) and 7 (a)), the mutually opposing distal end faces 10a of the bag body 10 which are sequentially conveyed are sucked by the vacuum pad 31, and
As shown in FIG.

The second step (FIGS. 6B and 6B), FIG.
(B), (b ')), the expanded end face 1
0a, a pair of sliding plates 32, 32 are made to enter from the front of the bag body 10 (a direction perpendicular to the conveying direction X), and the conveying direction is set so that the sliding plates 32, 32 are separated from each other. As shown in FIG. 8B, a part of the distal end of the fold 10B is bent along two ridge lines α extending from the base point P to expand the triangular shape as shown in FIG. Is formed.

The structure for forming the open surface 10b in the second step will be described in more detail with reference to FIGS. 11, 12 and 13. A pair of jigs 33A and 33B are provided in the second step. The bag main body 10 that has been placed in a state of being vertically overlapped and that has passed through the first step is sandwiched in a gap between the pair of jigs 33A and 33B. The side surfaces of the pair of jigs 33A, 33B are respectively inclined surfaces 33a, 33 inclined inward.
The space 34 has a triangular cross-section formed by the inclined surfaces 33a and 33b.

The front end face 10a of the bag body 10 and the front end of the fold 10B which are expanded in the first step are located in the void 34, and the front end face of the expanded bag body 10 is located. A pair of sliding plates 32, 32 are advanced from the side portions of the jigs 33A, 33B in a direction perpendicular to the transport direction X and enter the inside of 10a.

Each of the sliding plates 32, 32 has a wedge-shaped tip and is pointed.
4 substantially coincides with the cross-sectional shape. Also, the sliding plate 32,
The rubber plates 32A, 32A made of silicon are fixed to inner surfaces of the sliding plates 32 facing each other with their outer edges protruding from the outer edges of the sliding plates 32, 32.

At the stage when the bag body 10 has been shifted from the first step to the second step, as shown in FIG. 12A, the sliding plates 32, 32 at the retracted position are advanced together with the base 37. Then, as shown in FIG. 12B, the bag body 10 is made to enter the inside of the front end face 10a. The forward movement of the base 37 and the backward movement described below can be performed by operating the motor 35 and the screw shaft 36 as shown in FIG.

After the sliding plates 32, 32 have entered the inside of the front end face 10a of the bag body 10, one of them is in the same direction as the conveying direction X and the other is in the conveying direction X, as shown in FIG. Are driven to slide away from each other. As means for expanding the sliding plates 32, 32, various means such as a mechanism combining a motor and a screw shaft or a cam mechanism can be used.

When the sliding plates 32, 32 are opened, the bag body 10 is moving in the transport direction X, so that one of the sliding plates 32 sliding in the same direction as the transport direction X
The bag is slid at a speed higher than the moving speed of the bag body 10.

When the sliding plates 32, 32 slide, the outer edges of the rubber plates 32A, 32A are in sliding contact with the folds 10B of the bag body 10, respectively.
0B is pressed against the inclined surfaces of the jigs 33A and 33B, thereby folding the fold 10B to the intermediate base point P as described above.
Is bent along two ridgelines α extending obliquely from the opening to form a triangular open surface 10b. At this time, due to the elastic action of the rubber plates 32A, 32A, the opening surface 10b is formed as if pressed with a human finger.
0B is bent along the ridgeline α, so that the opening surface 10b is reliable and has a good finish.
Can be formed.

As shown in FIG. 13D, when the sliding plates 32 and 32 come off from both sides of the bag body 10 after the formation of the open surface 10b is completed, the sliding plates 32 and 32 are retracted together with the base 37. It returns to the initial state of (a).

In the third step (FIGS. 6 (c) and 7 (c)), the zipper tape 11 fed out from the reel 38 between the front end surfaces 10a of the bag body 10 having the open surfaces 10b is illustrated. As shown in FIG. 9 (c), it is sandwiched.

In the fourth step (FIGS. 6 (d) and 7 (d)), the zipper tape 11 sandwiched between the front end surfaces 10a of the bag body 10 is pressed by the pressing machine 39 as shown in FIG.
As shown in (d), the inner surface of the tip surface 10a is fused.
At this time, the zipper tape 11 is sandwiched between the distal end surfaces 10a in a state where the male part and the female part are fitted to each other. A female part is fused inside one end face 10a, respectively, inside the other end face 10a.

The fifth step (FIGS. 6 (e), (e '), FIG.
(E), (e ')), the tip surface 1 of the bag body 10
As shown in FIG. 10E, the portions 10c closer to the tip end than the zipper tape 11 fused to 0a are heat-sealed to each other by the press machine 40.

The sixth step (FIGS. 6 (f), (f '), FIG. 7)
(F), (f ')), a portion 11a of the zipper tape 11 fused to the tip end surface 10a, which is located on the side of the bag body 10, is shown in FIG. As described above, the portion of the zipper tape 11 protruding to the side of the bag body 10 is cut while being flattened by tapping. The flattening of the portion 11a of the zipper tape 11 located on the side of the bag body 10 is performed when the side of the bag body 10 is sealed in the next step (hereinafter, this sealing will be referred to as "sealing"). To prevent cracks or the like from occurring in the film material around the zipper tape 11 constituting the bag body portion 10 and to prevent a gap from being generated between the zipper tape 11 and the film material. That's why.

In the seventh step (FIGS. 6 (g) and 7 (g)), the side seal of the bag body 10 is performed by the press machine 42 as shown in FIG. 10 (g). This side seal is for sealing the entire upper side surface 10d of the opened bag body 10 when the bag body 10 in FIGS. 1 to 5 is formed. An opening (FIG. 1) formed on the side of the bag body 10 by the side seal.
4) are fused together.
The entire outer edge of the distal end face 10a is sealed together with the sealing of the distal end side portion 10c of the distal end face 10a in the fifth step.

The gusseted bag 10 'with a zipper produced through the above-described steps is filled with contents (eg, tea, coffee, etc.) from an unsealed rear end opening,
Seal the rear end to seal the inside. At the time of filling the contents, as shown in FIG.
0 ′ is expanded and expanded in thickness when the fold 10B is expanded, and has a box-like shape. As a result, the internal capacity is significantly larger than that of a conventional flat-type zipper-equipped seal bag, and the box-like form enables self-supporting.

When opening the gusseted bag 10 'with zipper, the space between the sealing portion 10c on the tip side and the zipper tape 11 is cut along the chain line β in FIG. When the seal with the zipper tape 11 is released, the upper portion of the gusset bag is opened, and the contents can be taken out. After the contents are taken out, the zipper tape 11 is sealed, so that the gusset bag can be taken out again. The inside of 10 'can be sealed.

FIG. 16 shows still another embodiment of the present invention, which is for molding a bag body 110 having side seal portions 111 at four corners as shown in FIG.

This embodiment is applied when the bag main body is molded by the cutting method described with reference to FIG. 4, and is provided on both sides of a cylindrical body S 'molded from a single band-shaped film. The side seal portion 111 is formed by a pair of seal bars 120, 120 arranged so as to extend in parallel with the traveling direction of the cylindrical body S '. That is, before cutting the cylindrical body S 'on which the fold b is formed, a pair of seal bars 1 is provided on both sides of the cylindrical body S'.
The side seal portions 111 are formed by pressing the folds 20 and 120 and heat sealing the folds and the side edges of the flat portion with each other.

As described above, the side seal portion 111
The so-called side body with a zipper as shown in FIG. 18 is similar to the bag body 10 in FIG.
The bag is made in the gusset bag 110 '.

The side gusset bags 110 'made from the bag body 110 have side seal portions 111 located at the four corners of the box-shaped container when the contents are filled and expanded. Since it plays the role of a pillar, it is excellent in independence and stability when placed upright as shown in the figure is improved. Therefore, the gusset bag can be made even with a thin laminated film.

[0043]

As described above, according to the present invention, the processing of the folds on the side portions, which is problematic when the zipper is attached to the gusset bag having the folds on the side portions, and the process of processing the gusset bags in the subsequent steps. The zipper can be mounted and sealed, and the bag main body, which has a large content and enables mass production of gusseted bags with zippers, can be used in the manufacturing process of gusseted bags with zippers. Moreover,
The gusseted bag with the zipper manufactured by the bag body provided by the present invention has a good appearance and high commercial value.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a bag body manufactured according to the present invention.

FIG. 3 is an enlarged perspective view showing a state in the middle of a production process of a bag main body by the apparatus of FIG. 1;

FIG. 4 is a perspective view showing another embodiment of the present invention.

FIG. 5 is a perspective view showing a final step of the embodiment.

FIG. 6 is a plan view showing an embodiment of a bag making apparatus provided with a bag main body manufactured according to the present invention to make a gusset bag with a zipper.

FIG. 7 is a side plan view showing an embodiment of the bag making apparatus.

FIG. 8 is a perspective view showing a state of bag making by the bag making apparatus in a stepwise manner.

FIG. 9 is a perspective view showing stepwise a continuation of a state of bag making by the bag making apparatus.

FIG. 10 is a perspective view showing stepwise a continuation of a state of bag making by the bag making apparatus.

FIG. 11 is a perspective view showing a mechanism for expanding a bag body in the bag making apparatus.

FIG. 12 is a plan view showing an operating state of a mechanism for expanding the bag body in a stepwise manner.

FIG. 13 is a plan view showing stepwise a continuation of the operation state of the mechanism for expanding the bag main body.

FIG. 14 is a perspective view showing a part of a bag main body in which side sealing is performed by the bag making apparatus.

FIG. 15 is a perspective view showing an example of a gusseted bag with a zipper made by the bag making apparatus.

FIG. 16 is a perspective view showing still another embodiment of the present invention.

FIG. 17 is a perspective view showing a bag main body molded in the embodiment.

FIG. 18 is a perspective view showing a side gusset bag made by the bag main body molded in the embodiment.

FIG. 19 is a perspective view showing a conventional seal bag with a zipper.

FIG. 20 is a perspective view showing a conventional gusset bag.

FIG. 21 is a perspective view showing a method for producing a conventional gusseted bag with a zipper.

[Explanation of symbols]

 10, 110 ... bag body 10 ', 110' ... gusset bag with zipper 10A ... flat surface 10B ... fold 11 ... zipper tape 20 ... bag body molding device 22 ... cutter 23 ... roller 24 ... cutter 120 ... side・ Seal part S… Film S1… Hollow body a… Recess

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-102747 (JP, A) JP-A-62-135160 (JP, A) JP-A-63-17036 (JP, A) JP-A-2- 164526 (JP, A) JP-A-62-156935 (JP, A) JP-A-5-221451 (JP, A) JP-A-2-165939 (JP, A) JP-A-4-339767 (JP, A) Hira 2-64028 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B31B 1/00-49/04

Claims (4)

(57) [Claims] 1. A conveying means for conveying a flat hollow body formed by bonding both side edges of a strip-shaped film material to each other along a longitudinal direction thereof, and both sides of the hollow body conveyed by the conveying means. Recess forming means for forming rectangular recesses having a predetermined width and depth at predetermined intervals along the longitudinal direction so as to form a pair at positions opposed to each other on the edge; Energizing both sides of the hollow body having the recess formed by the location forming means along the folding lines on both sides of the hollow body in a direction perpendicular to the longitudinal direction and folding the hollow body inward until the recess is hidden. With the side of the bag body on the side edge of the hollow body
A side surface forming means for forming a fold-shaped side surface portion configured by: a hollow body in which the fold-shaped side surface portion is formed on both sides by the side surface forming means , Formation
The tip surface of the hollow body part corresponding to the position is the upper part of the bag body
In front of the recess in the transport direction so that
At the end position, cut along the cutting line
A cutting means for forming the bag body by the cross-sectional, before being cut formed by the cutting means the bag body portion
A zipper that allows the bag body to be opened and closed on the inner surface of the tip surface
And a zipper attaching means for attaching a zipper to the gusset bag. 2. A flat hollow body formed by bonding both side edges of a strip-shaped film material to each other is transported along its longitudinal direction, and the opposite side edges of the hollow body being transported are opposed to each other. A rectangular recess having a predetermined width and depth is formed at predetermined intervals along the longitudinal direction so as to be paired with the position, and both sides of the hollow body formed with the recess are formed. by folding inwardly of the hollow body to the recess is hidden this hollow body along opposite sides of the fold line is urged in the longitudinal direction and perpendicular direction is configured on both sides of the hollow body as a side surface of the bag body portion Fold
Forming a side surface portion of the Rihidajo, a hollow body in which the folded pleated side portions are formed on both sides, before
A hollow body corresponding to the position of the recess in the longitudinal direction
Of the bag is configured as the upper part of the bag body.
At the front end position in the direction of conveyance of the recess.
Bag body portion taken along the section line you perpendicular direction to
Formed, and then the tip end surface of the bag body formed by cutting
Attach a zipper on the inner surface of the bag to open and close the bag body
A method for forming a bag body portion for making a gusset bag with a zipper. 3. A conveying means for conveying a flat hollow body formed by bonding both side edges of a belt-shaped film material to each other along a longitudinal direction thereof, and both sides of the hollow body conveyed by the conveying means. Is urged in the direction perpendicular to the longitudinal direction along the folding lines on both sides of the hollow body and folded inwardly of the hollow body, so that the flat portion of the bag body above and below the hollow body, and the hollow body Bags on both sides
A side surface forming means for forming a fold side surface configured as a side surface of the main body ; and a hollow body having a fold side surface formed on both sides by the side surface forming means at predetermined intervals. While cutting along the first cutting line orthogonal to the transport direction, both sides of the tip of this hollow body are continuous with the first cutting line and are predetermined along the second cutting line parallel to the transport direction. Cutting means for cutting off the distal end surface of the flat portion and the distal end portion of the side portion by cutting by a length; and cutting off the flat portion by cutting along the second cutting line among the fold-shaped side portions. A cutting device for cutting a portion, and a bag body forming apparatus for forming a gusset bag with a zipper, characterized by comprising: 4. A flat hollow body formed by bonding both side edges of a strip-shaped film material to each other is transported along its longitudinal direction, and both sides of the transported hollow body are placed on both sides of the hollow body. The bag body is urged in the direction perpendicular to the longitudinal direction along the fold line and folded inwardly of the hollow body, so that the bag body is located above and below the hollow body.
And the side of the bag body on both sides of the hollow body
Forming a fold-shaped side surface portion formed by: forming a hollow body having the fold-shaped side portion formed on both sides thereof at a first cutting line orthogonal to the transport direction at predetermined intervals. Along with cutting along both sides of the tip of the hollow body by a predetermined length along a second cutting line that is continuous with the first cutting line and parallel to the transport direction, the tip surface of the flat portion And cutting off a portion of the fold-shaped side portion separated from the flat portion by cutting along the second cutting line, wherein the gusset bag is provided with a zipper. For molding the bag body.