JP2000233458A - Method for manufacturing triangular packaging bag, and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently manufacture triangular packaging bags by method wherein the divergent end side and the convergent ends of a packaging bag are continued by passing a double film through a rotary fusing roller so as to weld the fusing edges so as to form a deformed strip member consisting of continuous lozenge patterns and finally cut them off. SOLUTION: Films 91 and 92 are drawn from upper and lower film winding drums 1 and 11 through feeding rollers 2 and 2 by drawing rollers 21 and 21 under the sate being put one upon the other so as to form edge welded parts on both the edges of the films by being passed through an edge sealing device 3. When the films pass through a fusing device 8, the films are fused and welded into a deformed strip part consisting of continuous near lozenge bags. The fusing device 8 is formed by opposedly arranging a fusing roller 81 and a bearer 84 having the transferring pass of the films between them. On the outer periphery of the fusing roller 81, fusing blades 82 and 82 for simultaneously fusing and welding the films are formed and, in addition, a cutting-in blade 83 for cutting-in bags is protrusively provided. Further, the films are cut width wise by the cutting blade 61 and the fixed blade 63 of a cutting device 6. Thus, bag can be continuously manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a substantially triangular packaging bag having an open enlarged edge for packaging a triangular sandwich or the like.

[0002]

2. Description of the Related Art FIG. 4 shows a known triangular packaging bag for packaging a triangular sandwich.
The bag is formed by laminating two films (91) and (92) and fusing them into a substantially triangular shape, and fusing the outer periphery excluding the enlarged edge serving as the opening edge (90) simultaneously with the fusing. The reduced side of the packaging bag (9) protrudes in a rectangular shape, and two parallel welding seal portions (93) (93) are formed at the protruding base end in parallel with the opening edge (90). A cut (94) is made in the reduced edge to break the bag and unwrap the package. The packaging bag (9) is symmetrical with respect to a virtual line L connecting the center of the opening edge (90) and the center of the reduced portion.

As shown in FIG. 5, an opening edge (90) of a packaging bag (9) is provided.
, And the sandwich S is put in, and the opening edge is closed to pack. The packaging bag (9) is manufactured by stacking two large films, pressing a rising / falling heat template against the film, and performing fusing and welding at the same time. Intermittent production due to intermittent running results in poor production efficiency.

According to the present invention, a rotating fusing roller is pressed while running a two-layer film,
An object of the present invention is to clarify a method and an apparatus capable of efficiently manufacturing a triangular packaging bag.

[0005]

The method for producing a packaging bag of the present invention comprises the steps of:
A manufacturing method of a synthetic resin film packaging bag (9) having a substantially triangular shape which is symmetrical with respect to an imaginary line connecting the center of the opening edge (90) and the center of the reduced portion by gradually reducing to one end side and opening the enlarged side. Then, the upper film (91) and the lower film (92) are overlapped and run, and the two films (91) and (92) are rotated by a fusing roller (81).
To form a deformed band-shaped member (99) in which the expanded ends and the reduced ends of the packaging bag are continuous with each other in the running direction of the film, and the fusing edges are welded simultaneously with the fusing to form a substantially rhombic continuous shape. The member (99) is cut by the cutting device (6) on the downstream side of the roller (81) in a direction perpendicular to the film flow direction according to the size of the bag.

The fusing roller (81) includes a plurality of rows of deformed belt-shaped members.
The members (99) and (99) that are adjacent to each other (99) and (99) and that can be melted so that the outlines thereof are shifted from each other by フ ィ ル ム pitch in the running direction of the film so that the contour lines coincide.

The apparatus for manufacturing a packaging bag according to the present invention is a substantially triangular synthetic resin film which is symmetrical with respect to an imaginary line connecting the center of the opening edge and the center of the reduced portion. An apparatus for manufacturing packaging bags, comprising a pair of pull-in rollers (2) and (2) for pulling two films (91) and (92) in an overlapping state, and a pair of pull-in rollers (2) and (2). A fusing device (8) that is provided on the downstream side and blows the two-layered film into a state in which the bags are continuous in the film flow direction, and is provided downstream of the fusing device (8) and corresponds to the size of the bag. And a cutting device (6) for cutting the film at right angles to the flow direction. The fusing device (8) comprises a rotary fusing roller (81) and a cradle (84) provided with a film transfer path interposed therebetween. The outer peripheral surface of the fusing roller (81) is filled with the expanded ends and the reduced ends of the packaging bag. Continuous in the direction of travel,
Further, a fusing blade (82) for projecting a fusing edge at the same time as fusing and forming a deformed band-shaped member (99) in which a substantially rhombic shape is continuous is protrudingly provided.

[0008]

[Functions and Effects] When the two films (91) and (92) pass through the fusing roller (81), the reduced ends and the enlarged sides of the packaging bag (9) are connected to each other, and the deformed band-like member ( 9
9), and the unit packaging bag is opened by the cutting device (6) that is on standby.
Cut to (9). Continuously running films (91) and (92)
Since the paper is passed through the continuously rotating fusing roller (81), the production efficiency is greatly improved as compared with the conventional intermittent bag production by raising and lowering the hot mold plate.

[0009]

FIG. 1 shows an example of a packaging bag manufacturing apparatus, and FIG. 3 shows a two-layer film formed by the apparatus and immediately before being cut into bags. On both side edges along the longitudinal direction of the film, an edge welded portion (97) is formed over the entire length, and between both edge welded portions (97), (97), a deformed band-like member (99) in which a substantially rhombic shape is continuous. ) Are formed in three rows, and the deformed band-shaped member (99) at the center is shifted by に 対 し て pitch from the deformed band-shaped members (99) at both ends, and the contour line is one line with the deformed band-shaped members (99) on both sides. I do.

The substantially diamond-shaped outline is obtained by thermally fusing the fusing edges of the upper and lower films at the same time as the thermal fusing. The adjacent deformed band-shaped members (99) and (99) are separated from the outline, The outlines of the films are connected.

The narrow portion of each deformed band-shaped member (99) protrudes in a rectangular shape, and the base end of the protruding portion extends along the width direction of the film.
The upper and lower films are thermally welded and two sets of parallel welded seals
(93) (93) and (93) (93) are formed. Therefore, in the deformable band-shaped member (99), a substantially diamond-shaped bag having no opening is continuous in the longitudinal direction of the film.

The two sets of parallel welding seal portions (93) (93),
(93) Between (93), cut along the longitudinal direction of the film (94)
Has been established. The length of the cut (94) is twice as long as the cut (94) of the packaging bag (9) shown in FIG.

The bag shown in FIG. 4 is formed by cutting in the width direction of the film so as to pass through the center of the cut (94) of the deformable band-shaped member (99) and pass through the center of the diamond-shaped bag. Is done. In the bag manufacturing apparatus described below, one diamond-shaped bag shown in FIG. 3 has a length of one pitch and is formed continuously.

[0014] The bag manufacturing apparatus includes an upper film winding drum.
(1) and a pair of pull-in rollers (2) and (2) for pulling out the films (91) and (92) in a state of two sheets being pulled out from the lower film winding drum (11), and a pair of pull-out rollers ( An edge seal device (3), a narrow portion seal device (4), and a fusing device (8) are provided between the edge seal device (21) and (21).

The edge sealing device (3) has a heat pressing surface (3
1) Edge seal roller (30) and press roller (32) around (31)
And are arranged facing each other across the transition path of the film,
This seals both side edges of the two-layered strip film.

The narrow portion sealing device (4) has six sets of two parallel heating and pressing ridges (41) (41) corresponding to the parallel welding seal portions (93) (93) of the packaging bag (9). The narrow-width seal roller (40) and the pressing roller (42) are arranged so as to face each other across the film transfer path. Heat press ridge of narrow width seal roller (40)
(41) (41), two sets are provided at the center part, two sets each having the same phase at both end sides of the seal roller, and two sets of heat pressing ridges (41) (41), (41), ( 41) (41) The heating pressing ridge at the center is 1
It is out of phase by 80 ° (in FIG. 3, the central ridge is hidden by the roller (40) and cannot be seen).

The fusing device (8) comprises a fusing roller (81) and a pedestal (84) opposed to each other with a film transfer path interposed therebetween. The fusing roller (81) is provided on the outer periphery with fusing blades (82) and (82) for fusing and simultaneously fusing a double-layered film corresponding to one pitch of a diamond-shaped bag shown in FIG. Is formed. In addition, the fusing roller (81) has a notch (94)
Cutting blades (83) are also provided.

The cradle (84) has an urethane rubber uncut belt (85) stretched between a drive roller (86) and a driven roller (87), and is compliant with the fusing roller (81). The belt-like belt (85) is supported by a receiving plate (88).

The fusing roller (81), the narrow seal roller (40), and the edge seal roller (30) are provided with a heater as a heat source.
(Not shown).

The cutting device (6) is provided with a fixed blade (63) and a rotary cutting roller (62) with a film transfer path interposed therebetween. The fixed blade (63) is formed in the shape of a square bar, and is disposed in the width direction of the film. The rotary cutting roller (62) has a cutting blade (61) protruding along the axial direction, and cuts the film in the width direction in cooperation with the fixed blade (63).

A pair of ear winding drums (7) and (7) are provided above the pull-out rollers (21) and (21), and the ear winding drums (7) and (7) are arranged as shown in FIG. Deformed strips on both sides (99)
The extra film piece (98) on the outer part of (99) is welded to the edge (97).
Is wound in a state of being connected in the longitudinal direction of the film.

The edge sealing device (3), the narrow portion sealing device
(4) The fusing device (8) is connected to a common or separate rotary drive device (not shown), and the pull-in rollers (2) and (2)
And the drawing rollers (21) and (21) are driven to rotate in accordance with the running speed of the film.

Narrow seal roller (40) and fusing roller (81)
As shown in FIG. 3, the rhombus-shaped contour portion and the parallel welding seal portion (9
3) so that (93) is welded and blown off without displacement,
The cutting device (6) is set so as to be able to cut at a half length position corresponding to one pitch of the film shown by A in FIG.
The uncut belt (85) is formed to have a length such that the fusing blade (82) does not hit the same position of the belt.

The upper and lower film winding drums (1) and (11) are drawn between the drawing rollers (2) and (2) and are drawn by the drawing rollers (21) and (21). The films (91) and (92) pass through the edge sealing device (3) to form edge welds (97) at both ends of the film. 2
Since the laminated films (91) and (92) are connected to each other by the edge welding portion (97), they can run stably, and the following processing is smoothly performed.

When passing through the narrow portion sealing device (4), the parallel welding seal portions (93) and (93) of the packaging bag (9) are formed by the heating and pressing ridges (41) and (41).

When passing through the fusing device (8), as shown in FIG. 3, a substantially rhombic bag is blown and welded to the continuous deformed band portion (99). A cut (94) is also made. The receiving table (84) disposed opposite to the fusing roller (81) is configured to be supported by a rotating plate (85) and a receiving plate (88), and the fusing blade (82) of the fusing roller (81) is provided. ) Can be prevented from hitting the same position of the belt (85), and the life of the belt (85) can be extended.

Since the lugs (98) of the film passing through the draw-out rollers (21) and (21) are continuous in the film flow direction by the edge welding portion (97), they can be wound up without being scattered.

The substantially diamond-shaped bag is cut at the center by the cutting device (6) to form a substantially triangular packaging bag (9) shown in FIG.

As described above, the method for producing the packaging bag of the present invention,
In the apparatus, since the continuously running films (91) and (92) are passed through the continuously rotating fusing roller (81), the production efficiency is greatly improved as compared with the conventional case of intermittent pressing of the hot mold plate.

In the practice of the present invention, the cuts (94) and the parallel welding seals (93) (93) of the packaging bag (9) are not necessarily required, and can be omitted. That is, the narrow part sealing device (4) of the bag manufacturing device can be omitted. When forming the parallel welding seal portions (93) and (93) with the cuts (94), a cutting blade for the cuts (94) is provided in the narrow-width seal roller (40) of FIG. ) May be omitted. Furthermore, the edge sealing device (3) is necessary for stabilizing the running of the two-layered film and for keeping the film ears (98) continuous. Manufacture of bags (9) is possible. The present invention is not limited to the configuration of the above embodiment, and various modifications can be made within the scope of the claims.

[Brief description of the drawings]

FIG. 1 is a perspective view of a bag manufacturing apparatus.

FIG. 2 is a perspective view of a fusing roller.

FIG. 3 is a plan view of a film that has passed through a fusing roller.

FIG. 4 is a perspective view of a packaging bag.

FIG. 5 is an explanatory diagram of a sandwich packaging procedure.

[Explanation of symbols]

 (3) Edge sealing device (31) Heat pressing surface (4) Narrow sealing device (40) Narrow sealing roller (8) Fusing device (81) Fusing roller (84) Cradle (6) Cutting device

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E064 AD12 AD21 BA22 3E075 BA62 CA02 DA03 DA04 DA05 DA14 DA15 DA32 DB02 DB12 DB14 DB27 DD13 DD33 DD45 DD46 DE14 GA02 GA04

Claims (4)

[Claims] 1. The method according to claim 1, further comprising:
A method for manufacturing a synthetic resin film packaging bag (9) having a substantially triangular shape symmetrical with respect to an imaginary line connecting the center of the opening edge (90) and the center of the reduced portion, comprising an upper film (91) and a lower film ( 92), the two films (91) and (92) are passed through the rotary fusing roller (81), and the enlarged ends and the reduced ends of the packaging bag continue in the film traveling direction, The cutting device is formed at the downstream side of the fusing roller (81), and the fusing edge is fused at the same time as fusing to form a deformed band-shaped member (99) having a substantially rhombic shape continuous.
(6) The method for producing a triangular packaging bag, wherein the member (99) is cut in a direction perpendicular to the flow direction of the film according to the size of the bag. 2. A state in which a plurality of rows of deformed band-shaped members (99) and (99) are adjacent to each other, and the adjacent members (99) and (99) are shifted from each other by a half pitch in the running direction of the film so that the contour lines are aligned. 2. The method of manufacturing a packaging bag according to claim 1, wherein the case is discharged and the deformed belt-shaped members (99) are blown into bags by a rotary fusing roll (81). 3. The method according to claim 1, wherein the one side is gradually reduced and the enlarged side is opened.
This is an apparatus for manufacturing an approximately triangular synthetic resin film packaging bag symmetrical with respect to an imaginary line connecting the center of the opening edge and the center of the reduced portion, where two films (91) and (92) are stacked. A pair of pull-in rollers (2) and (2) for pulling in a state, and a two-layered film disposed downstream of the pull-in rollers (2) and (2) are blown into a state in which the bags are continuous in the film flow direction. A fusing device (8) and a cutting device (6) arranged downstream of the fusing device (8) for cutting the film perpendicular to the flow direction according to the size of the bag;
(8) is composed of a rotary fusing roller (81) and a cradle (84) provided with a film transfer path interposed therebetween, and the outer peripheral surface of the fusing roller (81) has enlarged ends and reduced ends of the packaging bag. The packaging bag is provided with a fusing blade (82) for forming a deformed band-shaped member (99) that is continuous with each other in the running direction of the film, and the fusing edge is fused simultaneously with the fusing to form a substantially rhombus-shaped continuous band member (99). manufacturing device. 4. The fusing blade (82) of the fusing roller (81) includes a plurality of rows of deformed band-shaped members (99), and adjacent members (99) (99) have a pitch of 1/2 pitch in the running direction of the film. The packaging bag manufacturing apparatus according to claim 3, wherein the packaging bag can be melted so as to be displaced so that the contour lines match.