JP6962744B2 - Contents filling and packaging method and vertical filling and packaging machine - Google Patents

Description

The present invention relates to a filling and packaging method for contents and a vertical filling and packaging machine, and particularly to a method for forming a vertical seal of a packaging material.

Conventionally, a method and an apparatus for continuously producing a package filled with contents from a continuous film have been known. According to the method disclosed in Patent Document 1, a continuous film is formed into a cylindrical shape by a bag making guide. Next, the edge regions on both sides are joined by a vertical seal to form a cylindrical body continuous in the circumferential direction. After that, the tubular body is filled with the contents, a horizontal seal is formed in the width direction of the tubular body, and the horizontal seal portion is cut.

Wrap seals and fin seals are known as vertical seal methods. Wrap sealing is a method of sealing the edge regions so that one edge region of the inner surface of the film faces the other edge region of the outer surface of the film, and is also called envelope sticking. The fin seal is a method of sealing the edge regions so that the two edge regions on the inner surface of the film face each other, and is also called a gassho sticking.

Japanese Unexamined Patent Publication No. 2012-20776

Since the wrap seal and the fin seal have different overlapping methods of the two edge regions, it is necessary to use a dedicated packaging guide according to each sealing method. Therefore, when the wrap seal and the fin seal are formed by one vertical filling and packaging machine, it is necessary to replace the packaging guide as shown in Patent Document 1 (for example, the left figure and the right figure of FIG. 5). Yes, it takes time and effort.

An object of the present invention is to provide a filling and packaging method for contents and a vertical filling and packaging machine capable of forming a wrap seal and a fin seal with the same packaging guide.

In the content filling and packaging method according to one aspect of the present invention, the continuous film is guided on the curved guide surface of the packaging guide that surrounds the filling pipe, and the continuous film is surrounded and the continuous film is surrounded in the width direction. The first edge region and the second edge region are formed into a tubular shape so as to overlap each other, and the first edge region and the second edge region are joined by a vertical seal to be continuous in the circumferential direction. Forming a tubular body of continuous film, forming a first horizontal seal on the tubular body in a direction intersecting the vertical seal, and filling the area above the first horizontal seal of the tubular body from a filling pipe. It comprises filling the contents and forming a second horizontal seal in the upper region of the contents-filled tubular body in a direction intersecting the vertical seal. The first edge region is folded back before being introduced into the packaging guide, and the folded first edge region and the second edge region are joined to form a fin seal . The folded first edge region is heated by a heater while being separated from the adjacent region of the first edge region facing the first edge region before being introduced into the packaging guide. It is, restored the deformation of the first edge region Ru is prevented.

Another method of filling and packaging the contents according to another aspect of the present invention is to surround the filling pipe and in the width direction of the continuous film while guiding the continuous film on the curved guide surface of the packing guide surrounding the filling pipe. The first edge region and the second edge region are formed into a tubular shape so as to overlap each other, and the first edge region and the second edge region are joined by a vertical seal to be continuous in the circumferential direction. Forming a tubular body of continuous film, forming a first horizontal seal in the tubular body in a direction intersecting the vertical seal, and filling a pipe in the upper region of the first horizontal seal of the tubular body. It has one of filling the contents from and forming a second horizontal seal in the upper region of the tubular body filled with the contents in a direction intersecting with the vertical seal. When the first edge region is folded before being introduced into the packaging guide, the folded first edge region and the second edge region are joined to form a fin seal. When the first edge region is not folded back, the wrap seal is formed by joining the first edge region and the second edge region. If the first edge region is folded before being introduced into the packaging guide, the folded first edge region is the first edge before being introduced into the packaging guide. It is heated by a heater in a state of being separated from the adjacent region of the first edge region facing the region, and the restoration deformation of the first edge region is prevented.

Vertical filling packaging machine of the present invention, a continuous film of organic and a first edge region and second edge regions in the width direction, is to produce a package which contents is filled. This vertical filling packaging machine includes a Seitsutsumi guide having a guide surface for molding guides the continuous film, through the interior of Seitsutsumi guide, a filling pipe for filling the contents, positioned downstream of the manufacturing wrapping guide It has a vertical seal forming device and a horizontal seal forming device located downstream of the vertical seal forming device. The guide surface of the packaging guide is formed into a cylindrical shape in which the continuous film surrounds the filling pipe and the first edge region and the second edge region that are folded back overlap each other. Vertical sealing forming apparatus, the Rukoto to adjust contact first edge region and a second edge region in the longitudinal seal, forming a tubular body of a continuous film circumferentially continuous. The horizontal seal forming device forms a horizontal seal in a tubular body in a direction intersecting the vertical seal. The vertical seal forming apparatus joins the folded first edge region and the second edge region when the first edge region is folded before being introduced into the packaging guide. When the fin seal is formed and the first edge region is not folded back, the wrap seal is formed by joining the first edge region and the second edge region. The vertical filling and packaging machine further has a heater located between the position where the first edge region is folded back and the packaging guide. When the first edge region is folded, the heater heats the folded first edge region away from the region adjacent to the first edge region facing the first edge region. However, the restoration deformation of the first edge region is prevented.

According to the present invention, the fin seal can be formed by folding back the first edge region of the continuous film introduced into the packaging guide. Further, the wrap seal can be formed by supplying the continuous film to the packaging guide without folding back the first edge region. Therefore, according to the present invention, it is possible to provide a filling and packaging method for contents and a vertical filling and packaging machine capable of forming a wrap seal and a fin seal with the same packaging guide.

It is a front view of the vertical filling and packaging machine which concerns on 1st Embodiment of this invention. It is a side view of the vertical filling and packaging machine shown in FIG. 1 as viewed from the direction A of FIG. It is a top view of the vertical filling and packaging machine shown in FIG. 1 as viewed from the B direction of FIG. It is a schematic perspective view which shows the process of forming a fin seal by the vertical filling and packaging machine shown in FIG. It is a schematic sectional view of a roller with a collar and a film guide. It is a schematic perspective view of the vertical heater bar of a vertical seal forming apparatus. It is a conceptual diagram of a fin seal. It is the schematic which shows the process from the formation of the first horizontal seal to the separation into individual packages. It is a perspective view which shows the process of forming a wrap seal by the vertical filling packaging machine shown in FIG. It is a conceptual diagram of a wrap seal. It is a schematic perspective view which shows the packaging process by the vertical filling packaging machine which concerns on 2nd Embodiment of this invention. It is a schematic cross-sectional view of a heater.

Hereinafter, some embodiments of the present invention will be described with reference to the drawings. In the present invention, a fin seal is formed by folding back one edge region (first edge region) of the continuous film before introducing the continuous film into the packaging guide. On the other hand, when forming the wrap seal, the edge region of the continuous film is not folded back. Therefore, the present invention is characterized by the process of forming the fin seal and the configuration of the vertical filling and packaging machine used for the process, and the following description also mainly describes the case of forming the fin seal.

Generally, the fin seal forms one thick vertical seal, and the wrap seal forms two thin vertical seals. The fin seal formed by one thick vertical seal has high seal strength and cannot be easily peeled off. The wrap seal formed by two thin vertical seals has low seal strength and can be easily peeled off (easy peel). However, with the wrap seal, even if the outer seal is destroyed, the inner seal can secure the sealing performance. Fin seals and wrap seals are often selected according to the contents to be filled, but may also be selected according to the practice at the place of sale (country of sale).

(First Embodiment)
FIG. 1 is a front view of the vertical filling and packaging machine according to the first embodiment of the present invention, FIG. 2 is a side view of the vertical filling and packaging machine shown in FIG. 1 as viewed from the A direction, and FIG. 3 is a side view. The top view of the vertical filling and packaging machine shown in FIG. 1 as viewed from the direction B of FIG. 1 is shown. FIG. 4 is a perspective view when a fin seal is formed by the vertical filling and packaging machine shown in FIGS. 1 to 3, and FIG. 5A is a schematic cross-sectional view of a colored roller as viewed from the direction A of FIG. 5 (b) shows a schematic cross-sectional view of the film guide seen from the direction B of FIG.

The vertical filling and packaging machine 1 has a packaging guide 2 for forming the continuous film F into a predetermined shape. The inside of the packaging guide 2 is an opening, through which the filling pipe 16 for filling the contents penetrates. That is, the packaging guide 2 surrounds the filling pipe 16. The packaging guide 2 has an outer surface curved from the back surface side of the packaging guide 2 (meaning the side into which the continuous film F is introduced) to the front surface side. The outer surface of the packaging guide 2 is the guide surface 2a of the continuous film F, and the continuous film F is formed along the guide surface 2a. The guide surface 2a has a width capable of conveying the entire width of the continuous film F on the back surface side. Two wings (first wing 2b and second wing 2c) having a symmetrical shape with respect to the center line in the width direction of the continuous film F are connected to the back surface of the guide surface 2a. Each wing 2b, 2c extends from the back surface to the front surface of the packaging guide 2 with a smooth curved surface that revolves around the filling pipe 16. The two wings 2b and 2c are closer to each other as they approach the front. The lower end of the first wing 2b guides the first edge region A1 in the width direction of the continuous film F, and the lower end of the second wing 2c guides the second edge region A2 in the width direction of the continuous film F. To guide you. The lower end of the first wing 2b and the lower end of the second wing 2c overlap each other on the front side. The two lower ends are offset from each other and face each other, with the end of the first wing 2b on the back side and the end of the second wing 2c on the front side. As a result, on the front side of the packaging guide 2, the first edge region A1 and the second edge region A2 are such that the second edge region A2 is outside the first edge region A1. Can be stacked. An elongated hole-shaped outlet opening 2d is formed at the lower end of the packaging guide 2, and in the continuous film F formed by the packaging guide 2, the second edge region A2 is the first edge region A1. It passes through the exit opening 2d in a state of being stacked on the outside. As a result, the continuous film F is formed into a cylindrical cross-sectional shape substantially similar to the outlet opening 2d. In this way, the packaging guide 2 forms the continuous film F so as to surround the filling pipe 16 and the first edge region A1 and the second edge region A2 overlap each other.

A vertical seal forming device 3 is provided downstream (lower) of the packaging guide 2. The vertical seal forming device 3 comprises a vertical heater bar 3a that abuts on the continuous film F from the outside of the continuous film F formed in a cylindrical shape, and a vertical heater receiver 3b located inside the continuous film F formed in a cylindrical shape. Have. The continuous film F is sandwiched between the vertical heater bar 3a and the vertical heater receiver 3b, and the first edge region A1 and the second edge region A2 of the continuous film F are joined (heat welded) by a vertical seal. .. As a result, a tubular body of the continuous film F that is continuous in the circumferential direction is formed.

FIG. 6 shows a schematic perspective view of the vertical heater bar 3a of the vertical seal forming device 3. As described above, one thick vertical seal is formed in the fin seal, and two thin vertical seals are formed in the wrap seal. Therefore, the contact portion 3c of the vertical heater bar 3a with the continuous film F is replaceable. That is, when forming the fin seal, as shown in FIG. 6A, the first contact portion 3c in which one thick convex portion 3e extending in the vertical direction is formed is attached to the main body 3d of the vertical heater bar 3a. When mounted to form a wrap seal, as shown in FIG. 6B, the second contact portion 3c'in which two ridges 3f extending in parallel with each other in the vertical direction are formed is the vertical heater bar 3a. It is attached to the main body 3d of. As a result, the number of parts and labor required for replacing the vertical heater bar 3a can be reduced.

A film feed roller 4 for feeding the continuous film F downward is provided downstream (downward) of the vertical seal forming apparatus 3. The film feed rollers 4 are provided at both side ends of the cylindrical body of the continuous film F, and grip the both side ends of the tubular body to convey the continuous film F. A pair of guide rods 5 are provided adjacent to the film feed roller 4. The distance between the two guide rods 5 is widened in the middle, and the tubular body of the continuous film F is widened laterally by the guide rods 5 and flattened.

A pair of ironing rollers 6 are provided downstream (downward) of the film feed roller 4. The ironing roller 6 presses the continuous film F from both sides over the entire width direction of the continuous film F to divide the contents filled in the tubular body of the continuous film F. In addition, the contents remaining at the formation position of the horizontal seal are eliminated to improve the reliability of the horizontal seal.

A lateral seal forming device 7 is provided downstream (downward) of the ironing roller 6. The horizontal seal forming device 7 has a horizontal heater bar 7a provided on one side of a tubular body of the continuous film F, and a horizontal heater receiver 7b provided on the other side. The horizontal heater bar 7a and the horizontal heater receiver 7b are provided over the entire width of the cylindrical body of the continuous film F. The horizontal seal forming device 7 forms a horizontal seal in a tubular body in a direction intersecting the vertical seal, preferably in a direction orthogonal to the vertical seal (horizontal direction). The horizontal seal forming device 7 also includes a cutter (not shown) that cuts the horizontal seal that separates the two adjacent packages and separates the two packages.

A plurality of rollers 8 are provided upstream of the packaging guide 2 with respect to the supply direction of the continuous film F. These rollers 8 apply an appropriate tension to the continuous film F, and introduce the continuous film F wound around the roll R into the packaging guide 2. Although illustration and description are omitted, the continuous film F may pass through a sterilization tank or the like before being unwound from the roll R and introduced into the packaging guide 2, and a plurality of rollers 8 are continuously connected to these devices. It also has a function of guiding the film F.

As described above, the first edge region A1 of the continuous film F is folded back before being introduced into the packaging guide 2. The position where the first edge region A1 is folded is referred to as the folding position P. As shown in FIG. 4, a colored roller 81 is provided on the downstream side of the folding position P of the continuous film F. As shown in FIG. 5A, at the end of the shaft 81a of the collared roller 81 on the first edge region A1 side, a collar 81b (flange) for preventing restoration deformation of the first edge region A1 is provided. Is provided. The collar 81b is adjacent to the edge of the folded continuous film F (that is, the folding line F1). The “adjacent” includes both a case where the collar 81b abuts on the folding line F1 of the continuous film F and a case where the collar 81b is slightly separated from the folding line F1. When the continuous film F is restored and deformed by the elastic restoring force, it comes into contact with the collar 81b, and further return deformation of the continuous film F is prevented. It is desirable that the colored roller 81 is close to the folding position P, and among the plurality of rollers 8, it is desirable that the roller 8 downstream of the folding position P and closest to the folding position P is the colored roller 81. .. A plurality of colored rollers 81 may be provided downstream of the folding position P. Although the collar 81b is removable from the shaft 81a, it may be configured to be movable in the axial direction of the roller 81.

When the first edge region A1 is restored and deformed, the restoring force may cause the continuous film F to receive an axial force toward the second edge region A2, but the axial direction of the roller 81 of the continuous film F. The movement of the film F is prevented by the frictional force acting between the continuous film F and the roller 81. Therefore, although it is not necessary to provide a collar on the second edge region A2 side, a collar similar to the collar 81b on the first edge region A1 side can be provided just in case. In order to correspond to various widths of the first edge region A1, the colored roller 81 is provided with a marking line 81c indicating the target position of the folding line F1. The axial position of the color 81b can also be set with the scribe line 81c as a guide.

As shown in FIG. 4, a film guide 9 is provided downstream of the folding position P and downstream of the collared roller 81 to pass the first edge region A1 and prevent the restoration deformation of the first edge region A1. Has been done. As shown in FIG. 5B, the film guide 9 has a pair of structures 9a and 9b facing each other with a gap 9c in the thickness direction of the continuous film F, and is a first edge region of the continuous film F. A1 and a region adjacent to the first edge region A1 and facing the first edge region A1 by folding back the first edge region A1 (hereinafter referred to as an adjacent region A3) have this gap 9c. Passed through. The film guide 9 has a U-shaped cross-sectional shape with the continuous film F side open, and extends in the transport direction of the continuous film F. The height Hg of the gap 9c is set to be smaller than the sum of the thickness tF of the continuous film and the folding length L1 of the first edge region. As a result, even when the first edge region is folded back by 90 degrees (that is, when the angle between the first edge region and the center portion in the width direction of the continuous film F becomes 90 degrees), the first edge is formed. Since the end portion of the portion region abuts on the structure 9a, further restoration deformation is prevented. However, in order for the continuous film F to surely pass through the film guide 9 and more effectively prevent the restoration deformation, it is desirable that the height Hg of the gap 9c is about 10 to 20 times the thickness tF of the continuous film. .. The pair of structures 9a and 9b are a pair of flat plates, but the surface facing the continuous film F is not limited to a flat surface and may be a curved surface. The position and number of film guides 9 are not limited. The length of the continuous film F of the film guide 9 in the transport direction is also not limited. The film guide 9 may be detachable from the vertical filling / packaging machine 1 or may be movable in a direction approaching or separating from the continuous film F. In order to handle continuous films F of various types and thicknesses, it is possible to prepare a plurality of film guides 9 having different intervals between the pair of structures 9a and 9b, or even if the intervals can be changed mechanically. good.

The position of the roller 8 (hereinafter referred to as the upstream roller 82) on the upstream side of the folding position P of the continuous film F and closest to the folding position P is movable in the axial direction X of the upstream roller 82. By moving the upstream roller 82 toward the second edge region A2 and causing the first edge region A1 before being folded to protrude from the end of the upstream roller 82 on the first edge region A1 side, the first The edge region A1 of the can be easily folded back. When it is not necessary to fold back the first edge region A1 (that is, at the time of wrap sealing), the upstream roller 82 is returned to the first edge region A1 side. As a result, the entire width of the continuous film F passes over the upstream roller 82, so that the continuous film F can be stably conveyed.

Next, a method of manufacturing a package filled with the contents by using the vertical filling and packaging machine 1 of the present embodiment will be described. The vertical filling and packaging machine 1 of the present embodiment can form both a fin seal type vertical seal and a wrap seal type vertical seal, but first, a case where a fin seal is formed will be described.

As will be described later, the layer structure of the continuous film F is different between the case of forming the fin seal and the case of forming the wrap seal. Therefore, first, a roll R for fin sealing is attached, and the continuous film F is hung around each roller 8 of the vertical filling and packaging machine 1. The upstream roller 82 is moved to the second edge region A2 side in advance. As a result, when the continuous film F is hung around the upstream roller 82, at least a part, preferably all of the first edge region A1 of the continuous film F protrudes from the upstream roller 82. Next, the continuous film F is passed through the packaging guide 2, the vertical seal forming device 3, and the horizontal seal forming device 7. As a result, the continuous film F is in a state of being continuous from the roll R to the horizontal seal forming device 7 of the vertical filling and packaging machine 1. The first edge region A1 of the continuous film F is not folded back.

Next, the first edge region A1 is folded back by hand between the upstream roller 82 and the collared roller 81. Since the folded part is easy to return to the original in the initial stage, the folded part may be fixed with an adhesive tape or the like. The first edge region A1 is folded back at the exit of the packaging guide 2 in a direction facing the second edge region A2. In the case of FIG. 4, the first edge region A1 is folded back when viewed from the packaging guide 2. Since the first edge region A1 of the continuous film F protrudes from the end of the upstream roller 82 and is in a loosened state, the first edge region A1 can be easily folded back on the downstream side of the upstream roller 82. In this state, the vertical filling and packaging machine 1 is started to convey the continuous film F. Once the continuous film F is folded back, it is conveyed while maintaining its shape. The folding position P is also fixed at or near the position where the continuous film F is first folded. The first edge region A1 may be folded back using a dedicated folding device instead of being folded back by hand.

The continuous film F is then passed through a collared roller 81 that prevents restoration deformation of the first edge region A1. As a result, the movement of the edge portion (folding line F1) on the first edge region A1 side of the continuous film F is restricted, and the continuous film F is less likely to be restored and deformed. The continuous film F is then passed through a film guide 9 that prevents restoration deformation of the first edge region A1. Since the restoration deformation of the first edge region A1 inside the film guide 9 is suppressed by the film guide 9, the restoration deformation is less likely to occur in the first edge region A1 outside the film guide 9. ..

Next, the continuous film F is formed into a cylindrical shape while being guided on the packaging guide 2 having the curved guide surface 2a surrounding the filling pipe 16. Specifically, the central portion of the continuous film F in the width direction enters the inside of the packaging guide 2 so as to wrap around the rear wall of the packaging guide 2 (in the transport direction), and the first edge region of the continuous film F A1 and the second edge region A2 wrap forward along the lower edges of the first and second wings 2b and 2c of the packaging guide 2, respectively, and overlap with each other on the front surface of the packaging guide 2. At this time, as described above, since the second edge region A2 is located in front of the first edge region A1, the first edge region A1 is a combination of the second edge region A2 and the adjacent region A3. It will be sandwiched between them. Further, since the folded first edge region A1 is sandwiched between the adjacent region A3 and the guide surface 2a on the guide surface 2a of the packaging guide 2, the folded shape of the first edge region A1 Is held stably. The continuous film F further passes through the outlet opening 2d of the packaging guide 2 and is formed into a cylindrical shape. As a result, the continuous film F is formed into a cylindrical shape so as to surround the filling pipe 16 and to overlap the first edge region A1 and the second edge region A2. Further, the second edge region A2 is located above (outside) the first edge region A1, and the first edge region A1 is located between the second edge region A2 and the adjacent region A3. Sandwiched.

A vertical seal 13 in the form of a fin seal is formed on the continuous film F that has exited the packaging guide 2 by the vertical seal forming device 3. The continuous film F is temporarily stopped at the time of filling the contents, and then is conveyed to the filling position of the next package, repeating an intermittent operation. The first edge region A1 and the second edge region A2 are heat-welded by the vertical seal 13 when the continuous film F is stopped, whereby a tubular body of the continuous film F continuous in the circumferential direction is formed. Will be done. As shown in FIG. 7A, the continuous film F has a structure in which the heat welding layer 12 is laminated on the base material layer 11. Since the heat-welding layer 12 of the first edge region A1 and the heat-welding layer 12 of the second edge region A2 face each other, the first edge region A1 and the second edge region A2 are heat-welded. .. On the other hand, since the base material layers 11 face each other, the first edge region A1 and the adjacent region A3 are not joined even if heat is applied. FIG. 7B shows a vertical seal 13 formed on the continuous film F. The vertical heater bar 3a has one ridge portion 3e having a large width, and the corresponding vertical seal 13 also has one thick seal.

Next, a first horizontal seal 14 is formed on the tubular body of the continuous film F, the contents are filled, a second horizontal seal 15 is formed, and the film is cut and separated into individual packages. A schematic diagram of these steps is shown in FIG.

First, as shown in FIG. 8D, the first horizontal seal 14 is formed on the tubular body of the continuous film F by the horizontal seal forming device 7. The tubular body of the continuous film F is pressed against the pair of ironing rollers 6 above the lateral seal forming device 7. As a result, the package already filled with the contents is isolated from the continuous film F on the upstream side. The first horizontal seal 14 is a bottom horizontal seal for the packaging body to be followed, and is a top horizontal seal for the packaging body already filled with the contents, which precedes the packaging body. Next, as shown in FIG. 8E, the lateral seal forming device 7 and the ironing roller 6 are separated from the tubular body of the continuous film F, and the filling pipe 16 is placed in the upper region of the first lateral seal 14 of the tubular body. The contents are filled from. The contents are not particularly limited, and food and drink are typical, but any substance can be filled. The preceding package is separated by a cutter built in the lateral seal forming device 7.

Next, as shown in FIG. 8A, the tubular body is conveyed downward by the film feed roller 4, the transfer of the continuous film F is temporarily stopped, and the contents are further filled from the filling pipe 16. Although not shown, a vertical seal is formed on the upstream side at this time. Next, as shown in FIGS. 8 (b) and 8 (c), the tubular body is pressed by the ironing roller 6 while being conveyed downward by the film feed roller 4. As a result, the contents filled in the tubular body are divided into the amount of one package, and the portion where the second horizontal seal 15 is formed comes to the side of the horizontal seal forming device 7. The film feed roller 4 is stopped, and the transport of the tubular body is stopped. Next, as shown in FIG. 8D, the horizontal seal forming device 7 forms the second horizontal seal 15 in the upper region of the contents. As a result, the cylindrical body filled with the contents is in a sealed state in which the side surface is sealed with the vertical seal 13, the bottom surface is sealed with the first horizontal seal 14, and the top is sealed with the second horizontal seal 15. After forming the second horizontal seal 15, the ironing roller 6 is separated from the tubular body, and the cutter built in the horizontal seal forming device 7 cuts the vicinity of the center line in the vertical direction of the second horizontal seal 15. , The tubular body filled with the contents can be individualized.

Since the horizontal seal forming device 7 is provided downstream (downward) of the vertical seal forming device 3, the first horizontal seal 14 and the second horizontal seal 15 are formed on the vertical seal 13. The vertical seal 13 is deformed so as to be separated from the tubular body by the elastic restoring force, but since both ends of the vertical seal 13 are subsequently suppressed by the first and second horizontal seals 14 and 15, the vertical center of the vertical seal 13 is held. The part is slightly lifted from the tubular body.

Next, a method of forming the wrap seal will be described. FIG. 9 shows a perspective view when the wrap seal is formed by the vertical filling / packaging machine 1 shown in FIG. Here, the points different from the above-mentioned fin seal forming method will be described. First, a roll R for wrap sealing is attached and hung around each roller 8 of the vertical filling and packaging machine 1. The upstream roller 82 is moved to the first edge region A1 side in advance. As a result, when the continuous film F is hung on the upstream roller 82, the entire width of the continuous film F can be conveyed on the upstream roller 82, and skewing of the continuous film F can be suppressed. The collar 81b of the collared roller 81 is removed in advance or displaced in the axial direction to a position where it does not interfere with the continuous film F. Further, the film guide 9 is also removed in advance or moved to a position where it does not interfere with the continuous film F. When forming the wrap seal, the first edge region A1 is not folded back.

As shown in FIG. 10A, the continuous film F that has exited the packaging guide 2 has a first edge region A1 on one surface of the continuous film F and a second edge region A2 on the other surface. The second edge region A2 is superposed on the first edge region A1 so that The continuous film F for wrap sealing has a structure in which heat welding layers 12a and 12b are laminated on both surfaces of the base material layer 11. Therefore, when the vertical seal 13 is formed by the vertical seal forming apparatus 3, the first edge region A1 and the second edge region A2 are heat-welded. FIG. 10B shows a vertical seal 13'formed on the continuous film F. The vertical heater bar 3a'has two narrow ridges 3f, and the corresponding vertical seal 13' also has two narrow seals.

(Second Embodiment)
FIG. 11 is a perspective view when the fin seal is formed by the vertical filling and packaging machine according to the second embodiment of the present invention, and FIG. 12 is a schematic cross-sectional view of the heater as viewed from the direction A of FIG. .. Hereinafter, the description of the configuration similar to that of the first embodiment will be omitted, and only the configuration different from that of the first embodiment will be described. The vertical filling and packaging machine 1 of the present embodiment has a heater 10 that heats the first edge region A1 and prevents the restoration deformation of the first edge region A1. As shown in FIG. 12, the heater 10 includes a heater bar 10a and a heater receiver 10b, and a continuous film F passes between the heater bar 10a and the heater receiver 10b. When the continuous film F is stopped during the intermittent operation of the vertical filling and packaging machine 1, the heater bar 10a and the heater receiver 10b move in a direction approaching each other, sandwich the continuous film F from both sides, and the first continuous film F. The edge region A1 and the adjacent region A3 of the above are heated. The heater bar 10a and the heater receiver 10b heat the first edge region A1 and the adjacent region A3 until the continuous film F moves next, and then separate from the continuous film F. By heating with the heater 10, the folded state of the first edge region A1 is more stably maintained.

Although the present invention has been described above with some embodiments, the present invention is not limited to these embodiments. The colored roller 81, the film guide 9, and the heater 10 can be combined in various ways, and at least one of them may be provided. Further, depending on the type and thickness of the film (for example, when a thin film having a small elastic restoring force is used), all of these can be omitted.

The fin seal forms a wide single seal, and the wrap seal forms a narrow double seal, but the combination is not always limited. The fin seal may form the narrow double seal 13'shown in FIG. 10 (b), or the wrap seal may form the wide single seal 13 shown in FIG. 7 (b).

1 Vertical filling and packaging machine 2 Packaging guide 2a Guide surface 3 Vertical seal forming device 6 Ironing roller 7 Horizontal seal forming device 8 Roller 81 Colored roller 82 Upstream roller 9 Film guide 10 Heater 13, 13'Vertical seal 14 1st Horizontal seal 15 Second horizontal seal A1 First edge area A2 Second edge area A3 Adjacent area

Claims (12)

While guiding the continuous film on the curved guide surface of the packaging guide that surrounds the filling pipe, the first edge region and the second edge region that surround the filling pipe and in the width direction of the continuous film To form a cylinder so that they overlap,
The first edge region and the second edge region are joined by a vertical seal to form a cylindrical body of the continuous film continuous in the circumferential direction.
Forming a first horizontal seal in the direction of intersecting the vertical seal on the cylindrical body,
Filling the upper region of the first lateral seal of the cylindrical body with the contents from the filling pipe,
The tubular body filled with the contents comprises forming a second horizontal seal in the upper region of the contents in a direction intersecting the vertical seal.
The first edge region is folded back before being introduced into the packaging guide, and the folded first edge region and the second edge region are joined to form a fin seal. The first edge region formed and folded back from the region adjacent to the first edge region facing the first edge region before being introduced into the packaging guide. at a remote state, it is heated by the heater, restoring deformation of the first edge region Ru is prevented, filling and packaging method of the contents. The continuous film is adjacent to the folding line of the first edge region between the time when the first edge region is folded back and the time when the continuous film is introduced into the packaging guide, and the first edge region is adjacent to the folding line. The method for filling and packaging the contents according to claim 1, wherein the contents are passed through a roller having a collar for preventing restoration deformation. The folded first edge region has the thickness of the continuous film and the folded length of the first edge region in the thickness direction of the continuous film before being introduced into the packaging guide. The method for filling and packaging the contents according to claim 1 or 2, wherein the contents are passed between a pair of opposing structures with a gap smaller than the total of the above. The continuous film is passed through an upstream roller before the first edge region is folded back, and at least a part of the first edge region of the continuous film protrudes from the upstream roller in the upstream roller. The method for filling and packaging the contents according to any one of claims 1 to 3. While guiding the continuous film on the curved guide surface of the packaging guide that surrounds the filling pipe, the first edge region and the second edge region that surround the filling pipe and in the width direction of the continuous film To form a cylinder so that they overlap,
The first edge region and the second edge region are joined by a vertical seal to form a cylindrical body of the continuous film continuous in the circumferential direction.
Forming a first horizontal seal in the direction of intersecting the vertical seal on the cylindrical body,
Filling the upper region of the first lateral seal of the cylindrical body with the contents from the filling pipe,
The tubular body filled with the contents comprises forming a second horizontal seal in the upper region of the contents in a direction intersecting the vertical seal.
When the first edge region is folded back before being introduced into the packaging guide, the folded first edge region and the second edge region are joined to form a fin. When the seal is formed and the first edge region is not folded back, the first edge region and the second edge region are joined to form a wrap seal, and the first edge region is formed . When the edge region of is folded back before being introduced into the packaging guide, the folded first edge region is said to be the first before being introduced into the packaging guide. in a state away from the adjacent region of the first edge region facing the edge region, it is heated by the heater, restoring deformation of the first edge region Ru is prevented, filling and packaging method of the contents. The method for filling and packaging the contents according to any one of claims 1 to 5, wherein the first edge region is heated only while the continuous film is stopped. From a continuous film that have a the first edge region and second edge regions in the width direction, a vertical filling packaging machine for producing a package which contents is filled,
And Seitsutsumi guide having a guide surface for molding to guide the continuous film, through the interior of the steel hull guide, a filling pipe for filling the contents, the longitudinal seal forming located downstream of the pre-SL manufactured by wrapping guide It has an apparatus and a horizontal seal forming apparatus located downstream of the vertical seal forming apparatus.
The guide surface of the packaging guide is formed by forming the continuous film into a cylindrical shape so that the first edge region and the second edge region that surround and fold the filling pipe overlap each other.
The longitudinal seal forming apparatus, the Rukoto to adjust contact the first edge region and the second edge region in the longitudinal seal, shaping the tubular body of the continuous film circumferentially continuous,
The horizontal seal forming device forms a horizontal seal in the direction intersecting the vertical seal on the cylindrical body.
When the vertical seal forming apparatus is folded back before the first edge region is introduced into the packaging guide, the folded vertical seal forming apparatus includes the folded first edge region and the second edge region. A fin seal is formed by joining the first edge region, and when the first edge region is not folded back, a wrap seal is formed by joining the first edge region and the second edge region. death,
It further has a heater located between the position where the first edge region is folded back and the packaging guide, and the heater is said to be folded back when the first edge region is folded back. The first edge region is heated in a state of being separated from the adjacent region of the first edge region facing the first edge region to prevent the restoration deformation of the first edge region. Mold filling and packaging machine. The continuous film is located between the position where the first edge region is folded back and the packaging guide, and the folded first edge region passes through the continuous film in the thickness direction of the continuous film. The vertical filling and packaging machine according to claim 7, further comprising a pair of structures facing each other with a gap smaller than the sum of the thickness and the folded length of the first edge region. It has a roller located between the position where the first edge region is folded back and the packaging guide, the roller is provided with a collar, and the collar has the first edge region for packaging. The vertical type according to claim 7 or 8, which is adjacent to the folding line of the first edge region and prevents restoration deformation of the first edge region when folded before being introduced into the guide. Filling and packaging machine. It has an upstream roller located upstream of the position where the first edge region is folded back, and the upstream roller is folded back before the first edge region is introduced into the packaging guide. When the first edge region before being folded protrudes from the upstream roller, and when the first edge region is not folded, the first edge region is located on the upstream roller. The vertical filling and packaging machine according to any one of claims 7 to 9, which is movable in the axial direction. The vertical seal forming apparatus has one thick ridge portion that comes into contact with the continuous film, and one thick ridge portion corresponding to the one thick ridge portion in the first and second edge regions. It has a first contact portion that forms a vertical seal and two thin ridges that abut the continuous film, and the two thin ridges are formed in the first and second edge regions. The vertical filling and packaging machine according to any one of claims 7 to 10, wherein the second contact portion forming the corresponding two thin vertical seals is replaceable. The vertical filling and packaging machine according to any one of claims 7 to 11, wherein the heater heats the first edge region only while the continuous film is stopped.

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