JP2013035549A - Bag-making filling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously, appropriately and simultaneously form two rows of packaging bags which can be obtained by three-side seal packaging.SOLUTION: This bag-making filling machine includes: a forming means 2 for folding a film 1 along a transfer direction y on the left side, and folding the film 1 along the transfer direction y on the right side to locate the left end and right end of the film 1 in front of the center 1a of the film 1 in a process for transferring the film 1; a longitudinal sealing means 3 for heat-joining the left end and right end of the film 1 to the center 1a to form a longitudinal heat seal part in the transferred film 1 along the transfer direction y; a lateral sealing means 4 for intermittently forming lateral heat seal parts intersecting the transfer direction y, in the film 1 with the longitudinal heat seal part formed thereon; and a cutting means 6 located closer to the transfer destination of the film 1 than the lateral sealing means 4 to cut the film 1 within a range of the longitudinal heat seal part to thereby divide the film 1 to the right and left.

Description

  The present invention relates to an improvement of a bag making and filling machine.

  Among the bag making and filling machines, the three-sided seal wrapping machine is folded in half in the process of transferring a long film, and a vertical heat seal part along the transfer direction is applied to the edge of the film opposite to the folded side. After making this film into a cylindrical shape from the middle of the transfer, a transverse heat seal portion perpendicular to the transfer direction is intermittently applied in the transfer direction to the film while filling an object to be packaged in the transfer direction. A package bag body in which the other three sides are sealed and the object to be packaged is enclosed is continuously generated.

  One method to increase the amount of packaging bags produced per unit time using such a three-side sealed packaging using a single bag making and filling machine is the process of unwinding and transporting the roll-shaped film. Then, it can be considered that this is cut at the center and divided into right and left, the left and right films are folded in half, and the vertical heat seal portion is applied, and then the horizontal heat seal portion is applied. (See Patent Document 1)

  However, in this method, in order to bisect the film prior to heat-sealing the film, in addition to requiring a means for folding each film in half, the vertical heat-sealing portion is individually added to each film. It had to be formed. Further, since the film shrinks somewhat on the side where the vertical heat seal portion is formed by forming the vertical heat seal portion, in this method, the horizontal heat seal portion is appropriately applied simultaneously to two rows of films after the formation of the vertical heat seal portion. It was difficult to form. However, if such a transverse heat seal portion is also formed on each film individually, the structure of the bag making and filling machine is complicated.

JP-A-11-105809

  The main problem to be solved by the present invention is that the packaging bag body similar to the packaging bag body obtained by three-side seal packaging is made into one roll film without complicating the structure of the bag making and filling machine. Therefore, it is possible to generate two rows continuously and appropriately at the same time.

In order to achieve the above object, according to the present invention, in the process of continuously feeding and transferring a heat-sealable film that is wound up into a roll shape from the end of winding, the bag making and filling machine Fold along the film transfer direction on the left side of the center of the film, and fold along the transfer direction of the film on the right side of the center of the film. Molding means for positioning the left end and the right end;
Vertical sealing means for forming a vertical heat seal portion along the transfer direction on the film transferred by thermally bonding the left end and the right end of the film positioned in front of the center of the film to the center by the forming means; ,
For the film on which the vertical heat seal portion is formed, a transverse heat seal portion that intersects in the transfer direction is intermittently applied in the transfer direction, and the left and right sides of the vertical seal portion are respectively applied in order. A transverse sealing means for forming an enclosed space for the packaged object between the transverse heat seal portion and the transverse heat seal portion applied in the next order;
In the film to be transferred respectively on the left and right of the vertical heat seal part before the horizontal heat seal part of the next order is applied to the film, with the horizontal heat seal part applied in the previous order being a filling bottom. A filling means for filling the package with
Cutting means for cutting the film within the range of the vertical heat seal portion and dividing it into left and right positions is provided on the transfer destination side of the film with respect to the horizontal sealing means.

  According to such a bag making and filling machine, a packaging bag body similar to the packaging bag body obtained by three-way sealed packaging can be continuously produced from two roll-shaped films at the same time. The vertical heat seal part can be applied to the center of the left end and the right end overlapped with the center of the film by the forming means by a set of heat sealers, and the horizontal heat seal part is also applied to the film before cutting by the cutting means. Since it is applied, it can be appropriately applied to a desired position by a set of heat sealers.

  According to this invention, without complicating the structure of the bag making and filling machine, the packaging bag body similar to the packaging bag body obtained by the three-side seal packaging can be simultaneously divided into two rows from one roll-shaped film. Can be produced properly continuously.

FIG. 1 is a perspective view of a main part of a bag making and filling machine according to an embodiment. FIG. 2 is an enlarged perspective view of the right side of FIG. FIG. 3 is a side view of the portion shown in FIG. FIG. 4 is a cross-sectional configuration diagram illustrating a state immediately before the longitudinal heat seal portion is applied to the film. FIG. 5 is a perspective configuration diagram showing one of the packaging bag bodies generated from the bag making and filling machine according to the embodiment.

  Hereinafter, a typical embodiment of the present invention will be described with reference to FIGS. In the bag making and filling machine according to this embodiment, the packaging bag body P similar to the packaging bag body obtained by the three-side seal packaging is continuously fed from two rolls of film 1 'simultaneously for two rows. It can be generated appropriately.

  The bag making and filling machine includes a forming unit 2 for the film 1, a vertical sealing unit 3, a horizontal sealing unit 4, a filling unit 5, and a cutting unit 6.

  Forming means 2 is a process in which the heat-sealable film 1 (1 ′) wound up and formed into a roll is continuously fed out from the end of the winding and transferred to the left side of the center 1a of the film 1. Fold along the transfer direction y of the film 1, and fold along the transfer direction y of the film 1 on the right side of the center 1 a of the film 1. The left end 1b and the right end 1c are positioned.

  As the film 1, a single plastic film or a composite film is typically used. Such a film 1 is further driven by a heat sealer 3 ′ described later constituting the vertical sealing means 3 and a heat sealer 4 ′ described later forming the horizontal sealing means 4, and further, a pair of sandwiching rotating bodies appropriately added to the bag making and filling machine. It is transferred as described above by driving (illustration is omitted). The pair of sandwiching rotators is typically composed of a pair of transport rollers that face each other with the film 1 interposed therebetween.

  In the example shown in the figure, the film 1 is formed into a cylindrical shape so that the filling tube 5 ′ constituting the filling means 5 is wrapped around the film 1 in the course of the transfer. In the example shown in the drawing, the filling means 5 is composed of two left and right filling pipes 5 ′ and 5 ′. Each of the left and right filling pipes 5 ′ extends in the vertical direction, and the lower end serves as a discharge end 5 a of an object to be packaged (not shown), and the discharge end 5 a is positioned immediately above the horizontal sealing means 4. To the filling tube 5 ′, a packaged object is fed continuously or intermittently from a supply unit of a packaged object such as a hopper (not shown), and the packaged material is applied to the film 1 from the discharge end 5 a. Items are filled as described below. A space is formed between the left and right filling pipes 5 '.

  In the illustrated example, the film 1 is transferred using the filling tube 5 ′ as a guide before reaching the vertical sealing means 3. The film 1 is placed on one side of a virtual plane x (see FIG. 4) including the tube axis of the left filling tube 5 ′ and the tube axis of the right filling tube 5 ′ in the width direction of the film 1 (in the transfer direction y). The center 1a of the film 1 is positioned in the middle (orthogonal direction), and the fold is applied to the left side from the middle of the transfer outside the left side filling tube 5 '. The outer side of 'is folded on the right side from the middle of the transfer, and the virtual planes are respectively formed between the left-folded portion 1d and the left end 1b and between the right-folded portion 1e and the right end 1c. It is located on the other side of x and has a cylindrical shape as described above. The left end 1b and the right end 1c of the film 1 are typically abutted in front of the center 1a of the film 1, but a slight gap may be formed between the two.

  The forming means 2 is sufficient if it forms the film 1 to be transferred as described above before reaching the vertical sealing means 3. In the illustrated example, the forming means 2 is constituted by a frame body 2a that passes the film 1 to be transferred inside and forms the film 1 as described above.

  The vertical sealing means 3 is formed by transferring the left end 1b and the right end 1c of the film 1 superimposed on the center 1a of the film 1 by the forming means 2 to the center 1a of the film 1 and transferring the film 1 to the film 1 in the transfer direction. The vertical heat seal part Sa along y is formed.

  In the illustrated example, the vertical sealing means 3 is composed of a pair of heat sealers 3 ′ and 3 ′ which are heated to a temperature at which the thermal bonding is generated by a known heating means. Each heat sealer 3 ′ is composed of a rotating body 3 a installed so as to have a rotation center axis in a direction orthogonal to the transfer direction y of the film 1. Each heat sealer 3 ′ has a flange portion 3 b that goes around the rotation center axis. The thickness of the flange portion 3b is set to be equal to the width of the formed vertical heat seal portion Sa. And the flange part 3b of one heat sealer 3 'and the flange part 3b of the other heat sealer 3' are abutted with the film 1 formed as described above sandwiched therebetween. At the same time, each heat sealer 3 'is rotated in such a direction that the film 1 fed from above between the heat sealers 3' is fed downward. The pair of heat sealers 3 ′ and 3 ′ are not abutted at locations other than the flange portion 3 b, and the left side filling pipe 5 ′ passes between the pair of heat sealers 3 ′ and 3 ′ on the left side across the flange portion 3 b. The right filling tube 5 'passes between the pair of heat sealers 3' and 3 'on the right side of the flange portion 3b.

  The horizontal seal means 4 intermittently applies a horizontal heat seal portion Sb crossing in the transfer direction y to the film 1 on which the vertical heat seal portion Sa is formed in the transfer direction y, so that the vertical heat seal In each of the left and right sides of the part Sa, an enclosed space Pa for an object to be packaged is formed between the horizontal heat seal part Sb applied in the previous order and the horizontal heat seal part Sb applied in the next order.

  In the illustrated example, the horizontal sealing means 4 is also composed of a pair of heat sealers 4 ′ and 4 ′ which are heated to a temperature at which the thermal bonding is caused by a known heating means. Each heat sealer 4 ′ is composed of a rotating body 4 a that is installed so that the rotation center axis is arranged in a direction orthogonal to the transfer direction y of the film 1. Each heat sealer 4 ′ has four ridges 4 b along the rotation center axis, with the ridges 4 b adjacent to each other in the rotation direction, with an equal interval between them. Has in place. The length of the protruding portion 4b is larger than the width of the film 1 on which the vertical heat seal portion Sa is formed. Further, the width of the protruding portion 4b is set to be equal to the width of the formed lateral heat seal portion Sb. Then, the protrusion 4b of the other heat sealer 4 'is sequentially abutted on the protrusion 4b of the other heat sealer 4', with the film 1 having the vertical heat seal portion Sa formed therebetween as described above. It has become so. At the same time, each heat sealer 4 ′ is rotated in such a direction as to feed the film 1 fed from above between the heat sealers 4 ′ downward.

  The filling means 5 uses the horizontal heat seal portion Sb applied in the previous order as a filling bottom, and before the next heat transfer portion Sb in the next order is applied to the film 1, on the left and right sides of the vertical seal portion. Each of the films 1 to be transferred is filled with an article to be packaged.

  In the illustrated example, the filling pipe 5 ′ constituting the filling means 5 enters directly above the shaping means 2 from the side above the position where the shaping means 2 is disposed, and is bent 90 degrees and drooped there. Passing through the means 2, the discharge end 5 a is positioned below the vertical seal means 3 and above the horizontal seal means 4.

  The cutting means 6 is positioned closer to the transfer destination side of the film 1 than the horizontal sealing means 4 and cuts the film 1 within the range of the vertical heat seal portion Sa to divide it into left and right. More specifically, the film 1 is cut at a position between the left end 1b and the right end 1c of the film 1 superimposed on the center 1a of the film 1.

  In the illustrated example, the cutting means 6 is composed of a pair of rotating bodies 6a and 6a (slitters) which are abutted with the film 1 sent out from the lateral seal means 4 sandwiched therebetween and cut the film 1 at the abutting position. Has been.

  According to the bag making and filling machine according to this embodiment, the packaging bag body P, which is the same as the packaging bag body obtained by three-way seal packaging, is simultaneously obtained from two rolls of film 1 ′. Can be generated automatically. The vertical heat seal portion Sa can be applied to the left end 1b and the right end 1c superimposed on the center 1a of the film 1 by the forming means 2 and a set of heat sealers 3 'and 3', Since the heat seal portion Sb is also applied to the film 1 before being cut by the cutting means 6, it can be appropriately applied to a desired position by the set of heat sealers 4 ′ and 4 ′.

  In the illustrated example, the belt-like body, which is divided into right and left parts by the cutting means 6 and each comprises a plurality of packaging bag bodies P, is further subdivided by the subdividing cutting means 7 within the range of the lateral heat seal portion Sb. Cutting in a direction perpendicular to the direction y is performed to cut the bag one by one. In the illustrated example, the subdivision cutting means 7 is composed of a fixed blade 7a and a rotary blade 7b that allow the left and right strips to pass between the blade edges.

y Transfer direction Sa Vertical heat seal part Sb Horizontal heat seal part 1 Film 1a Center 1b Left end 1c Right end 2 Forming means 3 Vertical seal means 4 Horizontal seal means 6 Cutting means

Claims (1)

In the process of continuously unwinding and transferring the heat-sealable film wound up and rolled from the end of the winding, the film is folded on the left side of the center of the film along the film transfer direction, and the film Forming means for folding the film in the transfer direction of the film on the right side of the center of the film so that the left end and the right end of the film are positioned in front of the center of the film;
Vertical sealing means for forming a vertical heat seal portion along the transfer direction on the film transferred by thermally bonding the left end and the right end of the film positioned in front of the center of the film to the center by the forming means; ,
The film on which the vertical heat seal portion is formed is subjected to a transverse heat seal portion that intersects in the transfer direction intermittently in the transfer direction, and is applied in the order of precedence on the left and right of the vertical heat seal portion. A horizontal sealing means for forming an enclosed space for an article to be packaged between the horizontal heat seal portion and the horizontal heat seal portion applied in the next order;
In the film to be transferred, on the left and right sides of the vertical seal part, respectively, before the horizontal heat seal part of the next order is applied to the film, with the horizontal heat seal part applied in the prior order as the filling bottom. Filling means for filling an article to be packaged;
A bag making and filling machine comprising: cutting means for cutting the film within the range of the vertical heat seal portion and dividing the film into left and right positions that are located closer to the transfer destination of the film than the horizontal sealing means.

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