JPH09300486A - Continuously bag-making method for bag having corner cut off and with side face gusset, and bag making machine therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuously bag-making method with high efficiency for a bag whose corners are cut off and which has side face gussets, and a bag making machine therefor. SOLUTION: After forming slots 13 at a fixed interval in narrow beltlike sheet materials 1 for forming side face guessets in a set of two strips and folded in two, turning a non-heat-sealable face inside, the narrow beltlike sheet materials 1 are overlapped with and sandwiched between beltlike sheet material 2a, 2b which form fore and rear faces of a bag, and the side edges of the narrow beltlike sheet materials 1 and those of the beltlike sheet materials 2a, 2b are then heat-sealed, respectively. Further, after heat-sealing portions where the upper and lower beltlike sheet materials 2a, 2b are in contact with each other in the plane with the slots 13 therebetween, the bag with the side face gussets, which has been separated after a bottom seal and side cuts 20, is transferred to a cutting mechanism section, and four corners parts 24 of the bag are cut off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag manufacturing method and a bag manufacturing method for continuously manufacturing a side gusset bag body, which is a main body of a beverage container to which a cap-type mouthpiece is attached by a separate process, in a corner cut state. It relates to a bag-making machine.

[0002]

2. Description of the Related Art Since a packaging bag of this kind has a considerable hardness and is sharp in terms of material composition such as using a laminated material, if a corner is left at the corner, the purchaser will be Accidents such as cutting hands or puncturing other bags during transportation are likely to occur. Therefore, it has been conventionally done to prevent this kind of accident by cutting the corners of the bag round, called corner cuts.
A method is used in which several bag bodies, which are manufactured by a bag-making machine and separated into individual sheets and taken out, are stacked and the corner portions of the four corners are cut by a dedicated tool.

[0003]

However, this method has a problem that it is very inefficient because it requires manual work and another dedicated tool.

[0004]

DISCLOSURE OF THE INVENTION According to the present invention, a pair of two strips of sheet material for forming side gussets, which are folded in two with the non-heat-sealing surface facing inward, are provided with their parallel sides facing each other at a horizontal interval. While continuously feeding the strip-shaped sheet material, forming a long hole at a relative position on each folded end side of the strip-shaped sheet material at a constant interval in the feeding direction, and a step of continuously feeding the upper and lower surfaces of the strip-shaped sheet. Sandwiching between the band-shaped sheet materials and polymerizing, and between the folded end side of the upper piece of the thin band-shaped sheet material of the polymerized sheet material and the upper band-shaped sheet material and the lower piece of the thin band-shaped sheet material. A side sealing step of heat-sealing the entire length between the folded end side and the lower strip-shaped sheet material, and an elongated hole point sealing step of heat-sealing between the upper and lower strip-shaped sheet materials contacting each other through the elongated holes, , The width of the front position of the slot in the next row A bottom sealing step of heat sealing to the direction,
A side-cutting step of trimming the entire length of the outer end positions of the elongated holes of the both side seal parts, a cutting step of cutting across the position of the front row of the next row elongated holes, and a separated side gusseted bag An object of the present invention is to solve the problem by providing a step of transferring the body to a cutting mechanism section having a cutter blade, temporarily holding the body, and cutting off the corners of the four corners of the bag body.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

The drawings show one embodiment of the present invention, which shows a continuous bag-making machine for manufacturing bags with side gussets simultaneously in three rows.

FIG. 1 is an overall view thereof, and the molding material for the bag body is molded into the bag body while moving from the left to the right in the drawing and undergoing steps by each device. Each of the constituent devices comprises, in order from the left side, a material supply unit 3 for continuously supplying a thin strip-shaped sheet material 1 for forming side gussets and two strip-shaped sheet materials 2a, 2b for forming front and rear surfaces of the bag in a set of two rows and three columns. Elongated hole punching section 4 for forming elongated holes in strip-shaped sheet material 1 at regular intervals in the delivery direction, and superposition section 5 for sandwiching thin strip-shaped sheet material 1 between strip-shaped sheet materials 2a and 2b from above and below for polymerization. Side seal parts 6 for side-sealing each side end of the bag material in three rows, long-hole point seal parts 7 for point heat-sealing the long hole parts, bottom seal parts 8 for heat-sealing the bottom part of the bag body, At the same time as a side cut for trimming the entire length of the outer end positions of the elongated holes of the both side seal portions, at the same time, a cutting division part 9 for cutting and dividing the bag body material continuous in three rows into one row, and the bag body material continuous in each row Separating part 10 to separate the leaves into single leaves, the separated three-sided side gusset A corner cut section 11 for intermittently transferring the attached bag bodies at the same time to cut off the corners of the four corners of each bag body, and a pinching feed conveyor section for sandwiching and feeding the completed bag body with side gussets.
It consists of 12 and. A cooling means for preventing the deformation of the heat-sealed material is provided at an appropriate place on the way, but it is omitted.

The strip-shaped sheet material 1 for forming the side gusset supplied from the material supply section 3 is formed by combining the laminate materials so that one surface becomes the non-heat-sealing surface 1a and the other surface becomes the heat-sealing surface 1b. The strip-shaped sheet material 1 is continuously delivered in a state of being folded in half with the non-heat-sealing surface 1a inside. As shown in FIG. 2, this strip-shaped sheet material 1 is made up of two sets, and the folded-back sides 1c are horizontally facing each other with a parallel interval therebetween.
The groups are arranged in parallel so that they can be sent simultaneously. The spacing between each pair should be very small.

Each strip-shaped sheet material 1 is, as shown in FIG.
When passing through the long hole punching section 4, long holes 13 are formed at opposite positions on the folded-back end side at regular intervals in the delivery direction.

One row of the strip-shaped sheet material is continuously sent out to the upper and lower distant positions when passing between the upper and lower horizontal rollers 5a and 5b in the superposing section 5 similarly to the group of the strip-shaped sheet materials. The strip-shaped sheets 2a and 2b for forming the front and rear surfaces are sandwiched and polymerized.

Next, as shown in FIG. 4, the side seal portion 6
When each folded end side of the strip-shaped sheet material 1 is heat-sealed into a strip shape by passing through, the total length between the upper and lower heat-sealing surfaces 1b of the strip-shaped sheet material 1 and the upper and lower strip-shaped sheet materials 2a, 2b is heat-sealed. Each is heat-sealed and side-sealed 14. As described above, since the inner surface of the strip-shaped sheet material 1 is formed on the non-heat-sealing surface 1a, heat-sealing is not performed between the strip-shaped sheet materials.

In the subsequent long hole point seal portion 7, as shown in FIG.
The upper and lower strip-shaped sheet materials 2a and 2b which are in contact with each other via 13 are firmly heat-sealed. This is to prevent both shoulder portions of the bag body from greatly expanding in the front-rear direction due to the presence of the side gusset when the beverage is filled as shown in FIG.

The bottom seal portion 8 for heat-sealing the bottom portion of the bag body material is, as shown in FIGS. 6 to 7, at the front position of the elongated hole 13 in the next row from the middle of both side portions of the bag body material toward the center. A ship bottom seal portion 8a that is heat-sealed diagonally rearward to the ship bottom form 16 and a crosswise shape that crosses the position slightly ahead of the elongated holes 13 in the next row at the ship bottom seal end in the width direction.
Bottom bottom seal part 8b for heat sealing to 17, bottom bottom seal part 8c for strengthening the bottom bottom seal part, and folded strip-shaped sheet material 1 and strip-shaped sheet materials 2a, 2b four-layer and strip-shaped sheet material 2
It is composed of a bottom point seal portion 8d which is heat-sealed to reinforce the boundary portion of two sheets of only a and 2b, and multiple heat-sealings are performed to ensure the watertightness of the bottom.

Then, after passing through the cutting / dividing portion 9 provided with a razor-like blade, three rows of bag material are made into one as shown in FIG.
At the same time as being cut and divided into rows, side portions of the bag material, particularly the overlapping ends of the strip-shaped sheet material 1 and the strip-shaped sheet materials 2a and 2b, are side-cut 20 at the outer end position of each elongated hole 13. Trimmed.

Then, the cutter blade 10 of the next separating section 10
Three-sided bag with side gusset 21 cut into a single leaf so as to cross the position near the front of the slot 13 at a and 10b
8 and 11, feed rolls 22a, 22b provided in the corner cut portion 11 and provided in an up-and-down opening / closing shape.
It is pinched and fed by the closing rotation of, and is temporarily stopped and held at the set position, and the corners of the four corners are turned into the R shape 24 by the cutters 23a and 23b facing the four corners of each bag 21 at the stopped position. It is cut and cut off. Note that 25 and 25 are conveyors for discharging scraps.

After completion of the corner cutting, the completed side gusseted bag body 21 is again transported forward by the feed rolls 22a and 22b, and is carried out of the machine by the subsequent pinching and conveying conveyor section 12.

The side gusseted bag body 21 thus manufactured is set in another bag making and filling machine (not shown), and the bag body 21 shown in FIG.
As shown in FIG. 5, the beverage container 27 is provided with the cap-type mouthpiece 26 attached thereto.

[0018]

As described above, according to the present invention, the side hole gusset bag in which both shoulder portions are prevented from expanding by the long hole point seals and the sharp and dangerous corner portions are surely and cleanly cut into corners. The effect that a body can be manufactured continuously efficiently is produced.

Furthermore, since it is possible to simultaneously manufacture corner-cut bags with side gussets in a plurality of rows,
The effect is that the manufacturing efficiency can be remarkably improved.

[Brief description of drawings]

FIG. 1 is an overall front view of an apparatus showing an embodiment.

FIG. 2 is a side view showing a supply state of three sets of strip-shaped sheet materials and the strip-shaped sheet material.

FIG. 3 is a plan view of a strip-shaped sheet material showing a state in which elongated holes are formed.

FIG. 4 is a plan view showing a state in which a strip-shaped sheet material is polymerized with the strip-shaped sheet material and side-sealed.

FIG. 5 is a plan view showing a state in which the oblong hole point seal is also provided.

FIG. 6 is a plan view showing a state in which a ship bottom seal and a bottom bottom seal are provided on the left side of the drawing, and a top bottom seal is further shown on the right side.

FIG. 7 is a plan view showing a state in which after bottom point sealing is performed, each row is cut and divided, and at the same time, side cut is performed at the outer end position of the elongated hole.

FIG. 8 is an enlarged front view of a cutting section, a corner cutting section, and a pinching and feeding conveyor section.

FIG. 9 is a plan view showing the side gusseted bag body that has been separated and transferred to the front (corner cut portion).

FIG. 10 is an enlarged front view showing a state in which the corner portions of the four corners are cut off at the corner cut portion.

FIG. 11 is a partial plan view of the same.

FIG. 12 is a front view of the completed bag body with a side gusset.

FIG. 13 is a perspective view showing a beverage container in which a cap-type mouthpiece is attached and beverage is filled by post-processing of the side gusseted bag body of the present invention.

[Explanation of symbols]

 1 is a thin strip-shaped sheet material 2a, 2b is a strip-shaped sheet material 3 is a material supply section 4 is an elongated hole punch section 5 is an overlapping section 6 is a side seal section 7 is an elongated hole point seal section 8 is a bottom seal section group 8a is a ship bottom seal Part 8b is bottom bottom seal part 8c is bottom bottom seal part 8d is bottom point seal part 9 is cutting division part 10 is separating part 11 is corner cutting part 12 is feed conveyor 13 is long hole 14 is side seal 15 is side hole Seal 16 is a bottom seal 17 is transverse seal 18 is a reinforced seal 19 is a reinforced seal 20 is a side cut 21 is a side gusset bag 22a, 22b is a feed roll 23a, 23b is a cutter 24 is an R-shaped corner cut 25, 25 is a discharge conveyor 26 is a cap-type mouthpiece 27 is a beverage container

Claims (3)

[Claims] 1. A two-folded structure with the non-heat-sealing surface facing inward.
A pair of strip-shaped sheet materials for forming side gussets are continuously fed in such a manner that the folded sides are horizontally facing each other at parallel intervals, and are fixed in the relative position on the folded end sides of both strip-shaped sheet materials in the feeding direction. A step of forming elongated holes at intervals, a step of sandwiching the upper and lower surfaces of the strip-shaped sheet by sandwiching them between upper and lower strip-shaped sheet materials for polymerization, and the strip-shaped sheet of the polymerized sheet material A side-sealing step of heat-sealing the entire length between the folded end side of the upper piece of the material and the upper strip-shaped sheet material, and between the folded end side of the lower piece of the thin strip-shaped sheet material and the lower strip-shaped sheet material, , A long hole point sealing step of heat-sealing between the upper and lower strip-shaped sheet materials contacting each other through the long hole, a bottom sealing step of heat-sealing the front side position of the next row long hole in the width direction, and the both side seals Position of the outer edge of the slot A side-cutting process for trimming the entire length, a cutting process for cutting across the position near the front part of the next row elongated hole, and a separated side gusseted bag body is transferred to a cutting mechanism part equipped with a cutter blade. And a step of cutting off the corners of the four corners of the bag body, to provide a continuous bag-making method of a corner-cut bag body with side gussets. 2. A set of two strips of sheet material for forming a side gusset is sent out in parallel or in parallel by two sets or a plurality of sets, and the entire strips of sheet material are formed by widening the upper and lower strip sheets. 2. The method according to claim 1, wherein polymerization is carried out in a sandwich form, and in the side-cutting step, each pair of rows adjacent to each other is cut and divided. 3. A two-folded structure with the non-heat-sealing surface facing inward.
The strip-shaped sheet material for forming the side gusset of one set is continuously fed in one or a plurality of sets with the parallel sides being horizontally facing each other at parallel intervals, and the strip-shaped sheet material is spaced above and below the strip-shaped sheet material. A material supply unit for continuously delivering the strip-shaped sheets for forming the front and rear body surfaces of the bag body having a width that covers the entire set of both strip-shaped sheets and the opposite of the folding ends of the strip-shaped sheet materials. Elongated hole forming part for forming elongated holes at a certain position in the delivery direction, a polymerizing part for sandwiching the strip-shaped sheet between upper and lower continuous delivery belt-shaped sheet materials and polymerizing, and the polymerized sheet Heat the entire length between the folded end side of the upper strip of the strip-shaped sheet material and the upper strip-shaped sheet material and between the folded end side of the lower strip of the strip-shaped sheet material and the lower strip-shaped sheet material. Side seal part to seal and the length Slot seals for heat-sealing between the upper and lower strip-shaped sheet materials that contact each other through, bottom seals for heat-sealing the front position of the next row slot in the width direction, and slots for both side seals The side cut portion for trimming the entire length of the outer end position of the, the cutting portion for cutting across the position near the front portion of the next row elongated hole, and the separated side gusset bag body is transferred to the bag body. A continuous bag-making machine for corner-cut bags with a gusset, which is provided with a corner-cutting part having a cutter blade for cutting off the corners of the four corners.