JP2006298390A - Vertical filling and packaging machine and manufacturing method for packaging bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vertical filling and packaging machine which can manufacture a packaging bag with fine productivity. <P>SOLUTION: The vertical filling and packaging machine 1 has two packaging mechanisms 10A and 10B for manufacturing two packaging bags 65 simultaneously in one manufacturing process. Each packaging mechanism 10A and 10B is supplied with each of two films split from a longitudinal film pulled out of a single material roll. Pairs of drawing rollers 25, lateral sealing mechanisms 30, and cutting mechanisms 40 are each set in a common configuration for both packaging mechanisms 10A and 10B so that they can hold two cylindrical films 60 all together between them. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a vertical filling and packaging machine for producing a packaged product (packaging bag) in which a filling is enclosed, and a method for producing a packaging bag, and more particularly, a packaging machine for forming a packaging bag by forming a sheet-like film into a cylindrical shape. And a manufacturing method.

  Conventionally, for example, a vertical filling and packaging machine as shown in FIG. 10 is used to pack a liquid or paste-like filling.

  As shown in FIG. 10, the vertical filling and packaging machine 101 forms a sheet-like film 161 drawn from the raw roll 170 into a cylindrical shape by a bag making guide 105, and a vertical sealing mechanism is provided on the overlapping surface of the films 161. By forming a vertical seal portion at 106, the film 161 is made into a cylindrical film 160, and a packing material is put into the cylindrical film 160 to produce a packaging bag 165.

  Specifically, the vertical filling and packaging machine 101 includes a film feed roller 107 for transporting the tubular film 160 downward, a feeding nozzle 108 for feeding a filling material into the tubular film 160, and the tubular film 160. A pair of squeeze rollers 125 forming flat portions 160a by crushing them flat, a horizontal seal mechanism 130 for heat-sealing the flat portions 160a in the width direction of the tubular film 160, and a horizontal seal heat-sealed by the horizontal seal mechanism 130 And a cutting mechanism 140 having a built-in cutter 141 for cutting the part.

As other vertical filling and packaging machines, for example, two vertical sealing mechanisms 106 are arranged on both sides of the tubular film 160, or the horizontal sealing mechanism 130 and the cutting mechanism 140 are integrated. What is known is also known. As described above, various forms have been conventionally known as a vertical filling and packaging machine. In any packaging machine, basically, a sheet-like film 161 drawn from a raw roll is continuously formed in a cylindrical shape. It is common in that the packaging bag 165 is manufactured by forming and filling a predetermined amount of a filling material into the tubular film 160 and forming a heat seal portion as appropriate using the vertical seal mechanism 106 and the horizontal seal mechanism 130. Yes. Note that a vertical filling and packaging machine configured as shown in FIG. 10 is also disclosed in Patent Document 1, for example.
JP-A-11-171137

  By the way, in the vertical filling and packaging machine, it is required that the packaging bag can be produced efficiently. In this respect, there is still room for improvement in the conventional packaging machine and the method for manufacturing the packaging bag.

  Therefore, an object of the present invention is to provide a vertical filling and packaging machine and a method for manufacturing a packaging bag that can manufacture the packaging bag with high production efficiency.

  In order to achieve the above object, the vertical filling and packaging machine of the present invention includes a split cutter that cuts a long film drawn from one raw roll in the longitudinal direction of the long film and cuts it into a plurality of films, and the cutting A plurality of bag-making guides that form each of the formed films into a cylindrical shape, and a plurality of vertical sealing mechanisms that form a vertical seal portion in each of the tubular-shaped films and use the film as a cylindrical film, A plurality of injection nozzles for supplying a filler into each cylindrical film, a plurality of film feed rollers for conveying each cylindrical film vertically downward, and rotating with each cylindrical film held between them A pair of squeeze rollers that simultaneously convey the cylindrical films vertically downward while forming flat portions on the cylindrical films, and the flat portions of the cylindrical films. A horizontal seal mechanism provided with a heater bar and a heater bar receiver for forming a horizontal seal portion on each of the flat portions and sandwiching each horizontal seal portion formed on each tubular film at a time. A cutting mechanism having a pair of cooling bars for cooling the horizontal seal portion and one cutter for cutting each horizontal seal portion in the width direction, and simultaneously manufacturing a plurality of packaging bags in one manufacturing cycle. To do.

  Each of the packaging bags is sandwiched between two lateral seal portions in which the content is enclosed, and the content filling portion is disposed in the vicinity of both side end portions of the lateral seal portion. It may be a pillow packaging bag with a buffer part provided with a buffer part expanded so as to be difficult to be inserted into the side of the horizontal seal part, and in order to manufacture this packaging bag, the horizontal seal mechanism corresponds to the buffer part. You may be comprised so that a horizontal seal part which has a non-seal part in both ends can be formed. The split cutter may be a disc-shaped member having a cutting edge formed on the outer peripheral portion.

  Moreover, the manufacturing method of the packaging bag of this invention cuts the elongate film pulled out from one original fabric roll into a some film, and forms each of the said cut | disconnected film in a cylinder shape, and is cylindrical. A step of forming a vertical seal portion on each of the films and making the film into a cylindrical film, a step of charging a filler into each of the cylindrical films, and a pair of squeeze rollers, A step of sandwiching a portion where the filling of the tubular film is present and simultaneously transporting the tubular films vertically downward while rotating the squeeze rollers to form flat portions on the tubular films; and a heater bar And a horizontal seal mechanism provided with a heater bar receiver, the flat portions of the cylindrical films are collectively sandwiched between the flat portions, and a horizontal seal portion is provided on each of the flat portions. Using a pair of cooling bars, using a pair of cooling bars, and a step of cooling the horizontal seal portions by sandwiching the horizontal seal portions formed on the tubular films together. Cutting each of the lateral seal portions in the width direction and cutting the packaging bag from each of the tubular films.

  The vertical filling and packaging machine and the method for manufacturing a packaging bag according to the present invention are used to charge a plurality of cylindrical films formed by cutting a long film of one original roll, and to provide a vertical seal and a horizontal seal. Since a plurality of packaging bags can be manufactured in a single manufacturing cycle by forming portions and the like synchronously, the packaging bags can be manufactured with high production efficiency.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a side view schematically showing a configuration of a vertical filling and packaging machine according to an embodiment of the present invention. FIG. 2 is a front view of the vertical filling and packaging machine of FIG. FIG. 3 is a perspective view schematically showing a cutter for cutting the raw roll. FIG. 4 is a view showing a packaging bag manufactured by the vertical filling and packaging machine of the present embodiment. In the following explanation, a packaging machine for producing a packaging bag 65 having a buffer portion 68 as shown in FIG. 4 will be described as an example, but the present invention is not limited to this.

  As shown in FIG. 2, the vertical filling and packaging machine 1 is a packaging machine that is configured in a duplex manner so that two packaging bags 65 can be manufactured in a single manufacturing process. That is, the vertical filling and packaging machine 1 has two packaging mechanisms 10A and 10B, each of which basically has the same configuration as the vertical filling and packaging machine 101 shown in FIG. The packaging machine according to the present invention may include three or more packaging mechanisms.

  Since the packaging mechanisms 10A and 10B are all configured in the same manner, the packaging mechanism 10A will be described by taking one packaging mechanism 10A as an example. And a bag-making guide 5 that continuously forms a sheet-like film 61 drawn from the raw roll 70 into a cylindrical shape, and a side edge of the film 61 that is formed into a cylindrical shape by the bag-making guide 5 and is in an overlapping state And a vertical seal mechanism 15 for heat-sealing each other (vertical seal).

  The portion heat-sealed by the vertical seal mechanism 15 is also referred to as a vertical seal portion. In this specification, the film 61 in a state where the vertical seal portion is formed is referred to as a tubular film 60. In addition, as shown in FIG. 4, this vertical seal part finally becomes a vertical seal part 66c which is a center seal part of the packaging bag.

  Various types of conventionally known vertical sealing mechanisms 15 can be used. For example, the film is sandwiched between a pair of fixedly arranged heating members, and the film is conveyed in that state, whereby the vertical sealing is performed on the film. The part may be formed continuously. Alternatively, the film may be sandwiched between a pair of heating members movably provided in the vertical direction, and the vertical seal portion may be formed while feeding the heating member downward in accordance with the conveyance of the film. Furthermore, it is not configured to be movable in the vertical direction, and a heating member that moves forward and backward with respect to the film on the spot may be used. In this case, with the film transport stopped, the heating member is pressed against the film, thereby forming a vertical seal, and then the pressure is released and the film is transported by the length of the heating member. Then, the next vertical seal portion is formed by performing the pressing operation again. By repeating such a pressing operation and intermittent conveyance of the film, a continuous vertical seal portion is formed.

  Referring again to FIGS. 1 and 2, the packaging mechanism 10 </ b> A further includes a film feed roller 7 that is positioned below the vertical sealing mechanism 15 and that feeds vertically downward across both end portions of the tubular film 60. Yes. In the present embodiment, each packaging mechanism 10A, 10B has two pairs of film feed rollers 7, and therefore the packaging machine 1 as a whole is provided with a total of four pairs of film feed rollers 7. These four pairs of film feed rollers 7 are driven simultaneously by one drive source.

  In the vertical filling and packaging machine 1, the pair of squeeze rollers 25, the horizontal sealing mechanism 30, and the cutting mechanism 40 are configured in common to the two packaging mechanisms 10A and 10B. In common with 10B, only one is provided.

  As shown in FIG. 3, the sheet dividing cutter 75 is made of a disk-shaped member having a cutting edge formed on the outer peripheral portion, and is configured to be rotatable about a rotation shaft 75a. When the sheet-like film 61 is pulled out from the original roll 70, the cutting edge of the sheet dividing cutter 75 comes into contact with the film 61, and the sheet dividing cutter 75 rotates the film 61 along the longitudinal direction while rotating about the rotation shaft 75a. Divide into two. The divided films 61a and 61b are supplied to the bag making guides 5 (see FIG. 2) of the packaging mechanisms 10A and 10B described above. In the present embodiment, the width dimensions of the sheet-like films 61a and 61b divided into two are the same.

  The pair of squeeze rollers 25 (see FIGS. 1 and 2) is composed of two cylindrical rollers each configured to rotate in synchronization with the rotation of the film feed roller 7. As shown in FIG. 1, the squeeze roller 25 is configured to be movable forward and backward with respect to the tubular film 60, and has a sufficient length so as to sandwich two tubular films 60 conveyed in parallel. is doing.

  The pair of squeeze rollers 25 divides the filler in the cylindrical film 1 by sandwiching the cylindrical film 60 in a state where the filler is put into the cylindrical film 60, for example. And by rotating in this state, the two cylindrical films 60 are conveyed vertically downward simultaneously, forming the flat part 60a in which a filler does not exist. That is, the pair of squeeze rollers 25 has a function of dividing the filling material and a function of conveying the tubular film 60. It is preferable that the outer peripheral surface of the squeeze roller 25 that is in contact with the cylindrical film 60 is made of an elastic member such as rubber so that the cylindrical film 60 can be conveyed satisfactorily.

  The horizontal seal mechanism 30 includes a heater bar 30a and a heater bar receiver 30b that are disposed to face each other with the tubular film 60 therebetween. The heater bar 30a and the heater bar receiver 30b can move opposite to each other in the horizontal direction (a direction orthogonal to the conveying direction of the tubular film 60) to sandwich the two tubular films 60 in a lump, or release the sandwiching. It is configured as follows. The heater bar 30a has a built-in heater (not shown) for heating the tubular film 60, while the heater bar receiver 30b has silicone rubber affixed to the surface in contact with the tubular film 60a. Yes. The tubular film 60 is sandwiched between the heater bar 30a and the heater bar receiver 30b, and is pressurized and heated, whereby the tubular film 60 is partially melted and a horizontal seal portion is formed on the tubular film 60. The detailed shape of the pressure surface of the heater bar 30a according to this embodiment will be described later with reference to other drawings.

  The cutting mechanism 40 is disposed below the horizontal sealing mechanism 30 and has a pair of cooling bars 40 a and 40 b that sandwich the two tubular films 60 together. The cooling bars 40a and 40b cool the horizontal seal portion by absorbing the heat of the horizontal seal portion heat-sealed by the horizontal seal mechanism 30. Therefore, it is preferable to be made of a material having high thermal conductivity. On one cooling bar 40a, one cutter 41 for cutting the packaging bag 65 from the tubular film 60 by cutting the lateral seal portion in the width direction is provided in a groove formed in the cooling bar 40a. The cutter 41 is configured to be movable forward and backward with respect to the tubular film 60 by a drive source (not shown). The cooling bar 40b on the opposite side is formed with a groove for receiving the cutter 41 advanced for the cutting operation.

  Next, with reference to FIGS. 5 to 7 in addition to FIG. 4, the packaging bag 65 manufactured by the vertical filling and packaging machine of this embodiment will be described in detail.

  As shown in FIG. 4, the packaging bag 65 is a so-called pillow packaging bag, and is formed with two upper and lower horizontal seal portions 66a and 66b and one vertical seal portion 66c that are substantially parallel to each other. The filled content is filled in the filled content portion 67. A characteristic of the packaging bag 65 is that buffer portions 68 are provided at four locations in the vicinity of both end portions of the lateral seal portions 66a and 66b.

  The buffer part 68 is a structure part which expanded the content filling part 67 so that the side seal part side may be inserted in the vicinity of each edge part of the side seal parts 66a and 66b. In other words, the lateral seal portions 66a and 66b have a substantially constant width d near the center portion thereof, but are non-sealed portions at the buffer portion 68, and the lateral seal portions in the buffer portion 68. The widths 66a and 66b are smaller than the width dimension d. In short, the buffer portion 68 is only required to have a stepped boundary line 69 from the vicinity of the central portion of the lateral seal portion 66a toward each end of the packaging bag. The form of the “step” may be a stepped shape such that the width dimension of the horizontal seal portion becomes smaller toward the end of the packaging bag, or the width dimension of the horizontal seal portion may be the packaging bag. It may be such that it gradually becomes smaller while drawing a curve as it goes to the end side.

  In this way, the packaging bag 65 having the buffer portion 68 is damaged when the packaging bag 65 damages another packaging bag 65, for example, when a plurality of packaging bags 65 are assembled and accommodated in a cardboard box and distributed in that state. It is advantageous in that it is difficult.

  The reason for this will be described with reference to FIG. 5, FIG. 5 (a) shows the conventional packaging bag with which the filler was enclosed, and FIG.5 (b) expanded and showed the corner | angular part of the packaging bag of FIG. 5 (a). FIG.5 (c) shows the packaging bag which concerns on this embodiment with which the filling was enclosed, FIG.5 (d) expanded and showed the corner | angular part of the packaging bag of FIG.5 (c).

  A conventional packaging bag 165 shown in FIG. 5A has two upper and lower horizontal seal portions 166a and 166b, and each of the horizontal seal portions is a straight straight seal. When the packing is sealed in such a packaging bag, as shown in FIG. 5B, at the corner of the packaging bag 165, the boundary end between the content filling portion 167 and the lateral seal portion 166a A cornering A, which is a sharp corner, is generated in the portion. Such corners A pierce other adjacent packaging bags 165 or cause scratches.

  On the other hand, in the packaging bag 65 of FIG. 5C, the sharp corners as described above do not occur because the buffer portion 68 is formed at the corner of the packaging bag. This will be described with reference to FIG. FIG. 6 is a perspective view partially showing the corner of the packaging bag and its periphery, FIG. 6 (a) shows a conventional packaging bag, and FIG. 6 (b) shows the packaging bag of this embodiment. Yes.

  As shown in FIG. 6A, the angle A of the conventional packaging bag 165 appears at the end of the boundary line 169. When the amount of the filling material enclosed in the content filling unit 167 increases, the content filling unit 167 has a firmness, and the content filling unit 167 is rounded accordingly. As the filling portion is rounded in this way, the corners A become sharper.

  On the other hand, as shown in FIG. 6B, in the case of the packaging bag 65 of the present embodiment, the cornering A ′ appears at the end of the bent line 69 a generated on the extension of the boundary line 169. Here, the contents are present in the buffer portion 68 above the bending line 69a (on the side of the horizontal seal portion 66a). The sharpness A ′ generated in the packaging bag of this embodiment is reduced in sharpness as compared with that in FIG. In addition, the cornering A ′ is more easily deformed when subjected to external force than the conventional cornering A, which is less likely to damage other packaging bags. Means that.

  FIG. 7 is a perspective view for explaining another characteristic of the packaging bag 65 according to the present embodiment. As shown in FIG. 7 (a), when an external force in the X direction as shown by the white arrow is applied from both sides of the lateral seal portion 66a to the packaging bag 65 of the present embodiment in which the buffer portion 68 is formed, The packaging bag 65 is deformed into a state as shown in FIG. That is, the lateral seal portion 66a falls in the Z direction shown in the figure and both ends thereof are bent. Even if a similar external force is applied to the conventional packaging bag 65, such deformation is relatively unlikely to occur, but in the packaging bag 65 of this embodiment, this deformation occurs relatively easily. Thus, when an external force in a direction opposite to the cornering A ′ is applied, the fact that such deformation is likely to occur means that the cornering A ′ is unlikely to damage other packaging bags as described above. To do.

  In order to manufacture the packaging bag 65 having the buffer portion 68 as described above, in other words, to form the buffer portions 68 at both ends of the lateral seal portions 66a and 66b, the heater bar 30a of the packaging machine 1 of this embodiment is shown in FIG. The pressure surface as shown in FIG. As shown in the figure, the pressing surface 31 has two seal forming portions 32 corresponding to the packaging mechanisms 10A and 10B (see FIG. 2). Each seal formation part 32 forms the horizontal seal part 66 for two upper and lower horizontal seal parts 66a and 66b by a single seal.

  The surface shape of the pressurizing surface is not particularly limited as long as it can form any of a horizontal stripe seal, a solid seal, an emboss seal, and a mesh seal on the tubular film 60. Then, the surface shape is such that a horizontal streak seal can be formed. In addition, the sealing conditions (temperature, pressure, time, etc.) at the time of heat sealing may be appropriately selected according to the type of the tubular film 60. 240 degreeC and time conditions are about 0.2-1.5 second. In addition, the shape of the pressure surface on the heater bar receiver 30b side is not particularly limited, but may be the same shape corresponding to the pressure surface 31 of the heater bar 30a, for example.

  Next, an example of a bag making method by the vertical filling and packaging machine 1 of the present embodiment configured as described above will be described with reference to FIG. In FIG. 9, only one of the two packaging mechanisms 10A and 10B is shown, but the packaging mechanisms 10A and 10B are driven in the same manner while being synchronized.

  FIG. 9A shows an example of the initial state, and the pair of squeeze rollers 25, the lateral seal mechanism 30, and the cutting mechanism 40 are all open, and the lower side of the tubular film 60 is already on the lower side. One packaging bag 65 is formed. In the cylindrical film 60, the filling material is continuously charged from each charging nozzle 8.

  Next, as shown in FIG. 9B, after the liquid level of the filling becomes higher than the position of the squeeze roller 25, the cylindrical film 60 is sandwiched between the pair of squeeze rollers 25. Thereby, the filling in the cylindrical film 60 is divided | segmented up and down by the squeeze roller 25. FIG.

  Next, as shown in FIG. 9 (c), each squeeze roller 25 is rotationally driven with the tubular film 60 sandwiched therebetween, and the tubular film 60 is formed with a flat portion 60a that is an empty filling portion. 60 is conveyed downward. This conveying operation is performed until the horizontal seal portion 66 that has been heat-sealed in the previous step is positioned between the cutting mechanism 40. In this state, the flat portion 60 a is located between the lateral seal mechanisms 30.

  Next, as shown in FIG. 9 (d), the horizontal sealing mechanism 30 and the cutting mechanism 40 are driven in a state where the conveyance of the tubular film 60 is stopped. The horizontal seal mechanism 30 sandwiches the flat portion 60a of the tubular film 60, pressurizes and heats the tubular film 60, and forms the horizontal seal portion 66 in the flat portion 60a. On the other hand, the cutting mechanism 40 sandwiches the horizontal seal portion 66 formed in the previous step, and cools the horizontal seal portion 66 where heat still remains. After performing this cooling operation for a predetermined time, the cutter 41 is moved forward with respect to the tubular film 60. Thereby, the horizontal seal | sticker part 66 (refer FIG. 8) is cut into the horizontal seal | sticker parts 66a and 66b.

  Next, as shown in FIG. 9E, the pair of squeeze rollers 25, the lateral seal mechanism 30, and the cutting mechanism 40 are all opened. By opening the cutting mechanism 40, the holding of the lateral seal portion by the cutting mechanism 40 is released, so that the packaging bag 65 falls vertically downward.

  After the above process, the film feed roller 7 (see FIGS. 1 and 2) is driven, and the cylindrical film 60 is conveyed downward by a predetermined distance until it reaches the initial position shown in FIG.

  By repeating the series of steps as described above, the vertical filling and packaging machine 1 can continuously produce two packaging bags 65 each containing the filling.

  As described above, the vertical filling and packaging machine 1 according to the present embodiment has a double-type configuration including the two packaging mechanisms 10A and 10B in order to manufacture the two packaging bags 65 at the same time. It is possible to manufacture the packaging bag 65 with high production efficiency. Even in such a double-type configuration, the pair of squeeze rollers 25, the lateral seal mechanism 30, and the cutting mechanism 40 are configured in common for the packaging mechanisms 10A and 10B. The overall configuration is simplified. Thus, making the squeeze roller 25 etc. common to each packaging mechanism 10 </ b> A, 10 </ b> B means that the squeeze roller 25 etc. There is an advantage also in that the drive control is simplified, and a problem due to a shift in drive timing between the packaging mechanisms 10A and 10B hardly occurs. Furthermore, in the configuration of the packaging machine 1 of the present embodiment, one sheet-like film 61 pulled out from one original fabric roll 70 is divided by a sheet dividing cutter 75 to form two films 61 a and 61 b. Therefore, the workability relating to the replacement of the original fabric roll 70 is improved as compared with the configuration in which the original fabric roll 70 must be set in each of the packaging mechanisms 10A and 10B. That is, in the case of the configuration in which the original roll 70 is set in each of the packaging mechanisms 10A and 10B, for example, there are two timings for exchanging the original roll 70 depending on the difference in film length wound around each original roll 70 This is because the packaging mechanisms 10 </ b> A and 10 </ b> B may differ, thereby requiring two replacement operations.

  Moreover, according to the packaging bag manufacturing method of this embodiment which can be implemented using the vertical filling packaging machine 1 of this embodiment, a packaging bag is manufactured with high production efficiency for the same reason as described above. In addition, it is difficult to cause a problem that the driving timing is shifted in each of the packaging mechanisms 10A and 10B, and the workability regarding the replacement of the raw fabric roll 70 is improved.

  Further, the heater bar 30a and the heater bar receiver 30b in the horizontal seal mechanism 30 can form non-seal parts as buffer parts 68 at both ends of the horizontal seal parts 66a and 66b, as described with reference to FIG. It may be. Accordingly, it is possible to manufacture the packaging bag 65 described with reference to FIG. 4, that is, the packaging bag 65 having an advantage that the other packaging bag 65 is hardly damaged by having the buffer portion 68. It becomes.

  In addition, the manufacturing process of a packaging bag demonstrated with reference to FIG. 9 is only an example to the last, and the packaging bag manufacturing method of this invention is not limited to this. For example, regarding the driving of the squeeze roller 25, it is also possible to drive so as to sandwich the upper side from the liquid level of the filler in the cylindrical film 60. Moreover, the timing which drives the horizontal seal | sticker mechanism 30 and the cutting | disconnection mechanism 40 can also be changed suitably, and is not limited to what drives both the mechanisms 30 and 40 simultaneously. In the above description, the lateral seal mechanism 30 and the cutting mechanism 40 are separately configured. However, the lateral seal mechanism 30 and the cutting mechanism 40 may be unitized into a single mechanism. .

It is a side view which shows typically the structure of the vertical filling packaging machine by one Embodiment of this invention. It is a front view of the vertical filling packaging machine of FIG. It is a perspective view which shows typically the cutter which cuts an original fabric roll. It is a figure which shows the packaging bag manufactured by the vertical filling packaging machine of this embodiment. It is a top view which compares the structure of the conventional packaging bag and the packaging bag which concerns on this embodiment. It is a perspective view which shows the corner standing of a packaging bag, and its periphery partially. It is a perspective view for demonstrating the other characteristic of the packaging bag which concerns on this embodiment. It is a figure which shows the pressurization surface shape of a heater bar. It is a figure for demonstrating the manufacturing process of the packaging bag by the packaging machine of this embodiment. It is a figure which shows an example of a structure of the conventional vertical filling packaging machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vertical filling packaging machine 5 Bag making guide 7 Film feed roller 8 Injection nozzle 10A, 10B Packaging mechanism 15 Vertical seal mechanism 25 Shigaki roller 30 Horizontal seal mechanism 30a Heater bar 30b Heater bar receiving 31 Pressurization surface 32 Seal formation part 40 Cutting mechanism 40a, 40b Cooling bar 41 Cutter 60 Tubular film 60a Flat part 61, 61a, 61b Film 65 Packaging bag 66, 66a, 66b Horizontal seal part 66c Vertical seal part 67 Contents filling part 68 Buffer part 69 Boundary line 69a Bending line 70 Original fabric roll 75 Sheet split cutter 75a Rotating shaft A, A '

Claims (4)

A split cutter that cuts a long film drawn from one raw roll into a plurality of films by cutting in the longitudinal direction of the long film;
A plurality of bag-making guides that form each of the cut films into a cylindrical shape;
A plurality of vertical sealing mechanisms in which a vertical seal portion is formed in each of the tubular films, and the film is a cylindrical film;
A plurality of injection nozzles for charging the respective cylindrical films;
A plurality of film feed rollers for vertically conveying each cylindrical film;
A pair of squeeze rollers that simultaneously convey each cylindrical film vertically downward while forming a flat portion in each cylindrical film by rotating the cylindrical films together.
A horizontal seal mechanism comprising a heater bar and a heater bar receiver, forming a horizontal seal portion on each of the flat portions by sandwiching the flat portions of the cylindrical films together,
A pair of cooling bars that collectively sandwich the horizontal seal portions formed on the tubular films and cool the horizontal seal portions, and a cutter that cuts the horizontal seal portions in the width direction. A vertical filling and packaging machine that simultaneously produces a plurality of packaging bags in one production cycle. Each packaging bag is sandwiched between two horizontal seal portions in which a content is enclosed, and the content filling portion is placed in the vicinity of both side ends of the horizontal seal portion. It is a pillow packaging bag with a buffer part provided with a buffer part expanded so as to be difficult to put on the seal part side,
The vertical filling and packaging machine according to claim 1, wherein the horizontal sealing mechanism forms a horizontal sealing portion having non-sealing portions at both ends corresponding to the buffer portion.   The vertical filling and packaging machine according to claim 1 or 2, wherein the divided cutter is formed of a disk-shaped member and has a cutting edge formed on an outer peripheral portion thereof. Cutting the long film drawn from one raw roll into the plurality of films by cutting in the longitudinal direction of the long film;
Forming each of the cut films into a tubular shape, forming a vertical seal portion on each of the tubular films, and making the film into a tubular film; and
A step of charging a filler in each cylindrical film;
Using a pair of squeeze rollers, the portions where the fillings of the respective cylindrical films are present are sandwiched, and the squeeze rollers are rotated to form flat portions on the respective cylindrical films while vertically moving the respective cylindrical films. A process of simultaneously transporting downward,
Using a horizontal seal mechanism provided with a heater bar and a heater bar receiver, forming the horizontal seal portion on each of the flat portions by sandwiching the flat portions of the cylindrical films together;
Using a pair of cooling bars to cool each lateral seal portion together by sandwiching each lateral seal portion formed on each tubular film; and
The manufacturing method of a packaging bag which has the process of cut | disconnecting each said horizontal seal part in the width direction using one cutter, and carving a packaging bag from each said cylindrical film.

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