JP6080120B2 - Center seal device and pillow packaging machine - Google Patents

Description

The present invention relates to a peak low packaging machine.

  A pillow wrapping machine on which the center seal device of the present invention is mounted has the following configuration. First, the belt-shaped packaging film wound up by the raw fabric roll is continuously supplied to the bag making machine, and when passing through the bag making machine, the tubular film formed into a tubular shape is formed. In addition, an article transporting and supplying device is arranged on the upstream side of the bag making device, and an object to be packaged conveyed at predetermined intervals from the object to be packaged conveying and supplying device is supplied into the bag making device. Accordingly, when the article to be packaged passes through the bag making machine, the article to be packaged is stored at predetermined intervals in the cylindrical film, and the article to be packaged is conveyed together with the cylindrical film. A center seal device and an end seal device are arranged along the conveying direction. This type of pillow wrapping machine and center seal device are disclosed in, for example, Patent Document 1 and the like.

  The center seal device includes a pair of center sealers for heating and pressurizing sandwiching the polymer film end of the cylindrical film, and a pinch roller disposed before and after the center sealer. Each pinch roller includes a pair of rollers.

  The polymerization end of the cylindrical film is configured by overlapping both side edges in the traveling direction of the belt-shaped packaging film, and the two films are overlapped. Then, the overlapping ends where the two films are overlapped by the front and rear pinch rollers are respectively sandwiched and urged in the forward direction. The overlapping end where the two films are superposed moves forward in a state where the front and rear pinch rollers are stretched. Then, the polymerization end is sandwiched by the center sealer disposed between the front and rear pinch rollers, heated and pressurized, and the polymerization end is softened and fused. Then, there is a type in which a center seal is applied by pressing the overlapping ends softened by a pair of press rollers disposed in the next stage or a pinch roller in the subsequent stage from both sides.

  The end seal device includes a pair of top sealers that can sandwich the tubular film, and seals and cuts the tubular film in the lateral direction of travel (the portion where the front and rear packages are not present). The portion of the cylindrical film in which the leading article to be packaged is stored is separated from the subsequent cylindrical film to produce a package.

  When passing through the center seal device, the two films constituting the polymerization end are heat-sealed to form a center seal portion. Since the center seal portion is sandwiched between rollers or the like at the moment of sealing, the center seal portion is in a state of standing substantially perpendicular to the surface of the tubular film. And a center seal | sticker part will fall gradually as conveyance of the subsequent cylindrical film, will be in the state along the surface of the cylindrical film, and will be supplied to an end seal apparatus in this state.

  Therefore, the number of films sandwiched between the top sealers of the end seal device is four at the center seal portion and two at the portions other than the center seal portion.

JP 2008-1000073 A

  One of the packaging forms is called a gusset package. A gusset package takes the form which folded inward the film | membrane part in which the to-be packaged object does not exist among the side surfaces of a package. Then, a gusset forming device for folding the film portion inward is disposed in the vicinity of the end seal device, and the film is folded inward and sandwiched between a pair of top seals, and heat sealed to form an end seal portion. To do. Accordingly, both side edge portions of the end seal portion are sealed in a state where the film is folded, so that four films are sandwiched in the same manner as the formation position of the center seal portion.

  If the width of the center seal portion is long or the width of the package (end seal length) is short, the center seal portion and the gusset portion may overlap. Then, in the overlapped portion, six films are sandwiched between a pair of top sealers. Then, the number of films sandwiched by the top sealer is divided into two, four, and six parts due to the difference in the number of folded films, and the difference in the thickness of the sandwiched part becomes as large as four. There is a possibility that the sealing portion cannot be sufficiently secured without being sandwiched with a desired pressure.

  In order to solve such a problem, for example, a method can be adopted in which the center seal portion formed at the center position in the width direction of the normal package is shifted from the center so that the center seal portion and the gusset portion do not overlap. In addition, there is also a demand for shifting the center seal portion laterally due to design or other factors regardless of the presence or absence of the gusset portion.

  Since the packaging machine is manufactured in accordance with the packaging form, the manufacturer who manufactures the packaging body of both packaging forms mainly focuses on the packaging machine for the packaging body that forms the center seal portion at the center position, and the center seal portion. Since a plurality of types of packaging machines such as a packaging machine for a packaging body formed at a laterally shifted position are owned and used separately, the cost is increased and a plurality of installation spaces are required, which is not preferable.

In order to solve the above-described problems, the pillow packaging machine of the present invention includes: (1) a bag making machine that forms a strip-like film continuously supplied from a raw film, and a film traveling direction of the bag making machine; A center seal device that forms a center seal portion by sealing a portion where both side edge portions of a film formed in a cylindrical shape are arranged on the downstream side and a center seal device is disposed downstream of the center seal device in the film traveling direction. A pillow wrapping machine comprising: an end seal device that horizontally seals and cuts a cylindrical film formed by being sealed by the center seal device , wherein the center seal device has both side edges of the film. A sealer that heats the film, and a pinch roller that is disposed on at least one of the front and rear sides of the sealer and that moves the film in the forward direction across the edge portions on both sides. The unit with the sealer and the pinch roller, e Bei a moving mechanism for moving in a direction perpendicular to the conveying direction of the film, the bag unit is on the left and right sides of the traveling direction of the filmstrip, the filmstrip A left guide plate and a right guide plate that respectively bend both side edges, and the left seal plate is formed when the position of the center seal portion formed by the movement of the unit by the moving mechanism is shifted from the center position in the width direction of the tubular film. The shape of the guide plate is different from the shape of the right guide plate . As the sealer, various types such as a bar-like one that mainly heats the film and a one that heats and presses like a rotating roller are used. The moving mechanism may move the unit (sealer / pinch roller) in a direction orthogonal to the film transport direction and fix it at an appropriate position. The movement may be performed manually, or an apparatus / equipment such as a motor, cylinder, or other actuator may be used.

  By moving the unit, that is, the sealer and the pinch roller in a direction orthogonal to the transport direction by the moving mechanism, the center seal portion is formed at a different position in the width direction of the cylindrically formed film (direction orthogonal to the transport direction). be able to. That is, for example, it becomes a center seal device for a pillow packaging machine that manufactures a pillow packaging body of a general packaging form in which a center seal portion is formed at the center position in the width direction, or shifted from the center to the side (side edge) side. It can be a center seal device for a pillow wrapping machine that manufactures a pillow package in a packaging form in which a center seal portion is formed at a position. Therefore, when manufacturing a pillow package of such a different packaging form, it can be manufactured with one pillow packaging machine, and only one installation space is sufficient, and the cost is reduced.

Before Symbol moving mechanism, so that take the aspect of forming the center seal portion in the center position in the width direction of the formed film to the tubular, the manner of forming the center seal portion in a position shifted from the center position It is good to.

Prior Symbol pillow packaging machine, there reversed pillow type both side edges of the tubular to be the film is positioned on the upper side, the unit is configured to positioned over of the said tubular film, the two side It is good to provide the upper board which protrudes an edge part upwards.

(2) The pillow wrapping machine of the present invention may include a gusset forming device that forms gusset portions before and after the end seal portion sealed by the end seal device. (3) When the gusset forming device is provided as described above, the position of the unit set by the moving mechanism may be a position where the center seal portion and the gusset portion do not overlap .

  In this case, when the film is sandwiched and sealed by the end seal device, the number of the center seal portion is four, the number of the gusset portion is four, and the number of the unformed regions is two. Only needs 2 sheets. Therefore, end sealing can be reliably performed. The pillow wrapping machine of the present invention is a pillow wrapping machine with a gusset forming device, but the pillow wrapping machine to which the center seal device described in (1) to (3) is applied is limited to the one with a gusset forming device. It may be applied to a pillow wrapping machine having no gusset.

  According to the present invention, the center seal device can form the center seal portion at different positions in the width direction of the bag-shaped film. Therefore, when manufacturing a pillow package of a packaging form in which the formation position of the center seal portion is different, it can be manufactured with one pillow packaging machine by incorporating the center seal device of the present invention, and the installation space is also one unit. Is enough, and the cost is low.

1 is a front view showing a preferred embodiment of a pillow packaging machine including a center seal device according to the present invention. It is a front view which expands and shows a center seal apparatus part. It is a top view (the 1) which expands and shows a center seal device part. It is a front view (the 2) which expands and shows a center seal device portion. It is a front view (the 3) which expands and shows a center seal device part. It is a figure which expands and shows a bag making machine part, (a) is a side view, (b) is a top view, (c) is a front view. It is a figure which shows the side guide plate used for a bag making machine.

  The pillow wrapping machine 10 of the present embodiment is disposed on the upstream side of the packaging machine body 11, the film supply device 12 that continuously supplies a belt-like packaging film to the packaging machine body 11, and the packaging machine body 11. And a packaged article transport and supply device 14 that supplies the packaged article 13 to the packaging machine body 11 at predetermined intervals.

  The film supply device 12 links the output of a drive motor (not shown) (speed-controllable motor such as a servo motor) to the original roll 16 obtained by winding the belt-like film 15 into a roll. Supplying to the packaging machine body 11 at a constant speed while appropriately controlling the rotation speed. Various rollers 9 (only one is shown in the figure as a representative) are arranged at predetermined positions from the original fabric roll 16 to the packaging machine body 11, and the belt-like film 15 fed out from the original fabric roll 16. Is guided to the packaging machine main body 11 through a predetermined path by being passed over the roller 9. In the present invention, it is not always necessary to link the drive motor to the original fabric roll 16, and a feed roller may be provided on the transport path of the packaging film and pulled out.

  The to-be-packaged goods conveyance supply apparatus 14 is comprised by the plate-shaped conveyance path 17 and the conveyor apparatus 18 arrange | positioned above the conveyance path 17. The conveyor device 18 includes a sprocket 19 disposed at the front and rear, an endless chain 20 spanned by the plurality of sprockets 19, and a plurality of push fingers 21 attached to the endless chain 20 at predetermined pitches. The As a result, when the push finger 21 hits the rear surface of the article 13 to be packaged, the article 13 also moves forward on the transport path 17 as the push finger 21 moves.

  The packaging machine main body 11 includes a bag making machine 25 for making the supplied belt-like film 15 into the cylindrical film 24, a belt conveyor 26 that is arranged on the downstream side of the bag making machine 25 and conveys the tubular film 24, A center seal device 27 disposed above the belt conveyor 26, an end seal device 30 disposed downstream of the belt conveyor 26, a carry-out conveyor 28 disposed downstream of the end seal device 30, and a belt conveyor. 26, and a restraining belt 29 disposed immediately before the end seal device 30.

  The bag making device 25 allows the both side edge portions 15a of the belt-like film 15 to contact (polymerize) with each other by passing the belt-like film 15 continuously supplied from the film supply device 12, and is a cylindrical tube. Bag-like film 24 is made. The bag making device 25 of the present embodiment is set so that the upper side is open and the side edge portions 15a of the belt-like film 15 are positioned on the upper side.

  In addition, the articles to be packaged 13 that are sequentially supplied from the article transporting and supplying apparatus 14 to the packaging machine body 11 are inserted into the bag making machine 25. Thereby, the articles 13 to be packaged supplied to the bag making machine 25 are arranged in the cylindrical film 24 at predetermined intervals. In addition, since the article to be packaged 13 is included in the cylindrical film 24 as described above, the belt conveyor 26 conveys the cylindrical film 24 including the article to be packaged 13.

  The center seal device 27 seals both side edge portions 15a of the polymerized belt-like film 15. The center seal device 27 heat-seal by heating while sandwiching both side edge portions 15a of the belt-like film 15 from both sides. In the illustrated example, a bar-shaped sealer 31 that preheats the side edge portions 15a and a pair of right and left pressure rollers 32 that heat-seal while applying a predetermined pressure are provided. Further, the center seal device 27 includes a pair of left and right pinch rollers 33 on the upstream side of the sealer 31. The pinch roller 33 sandwiches the side edge portions 15a of the belt-like film 15 that has been in contact via the bag making machine 25 with a predetermined pressure, and rotates in synchronism with each other so that the side edge portions 15a and the belt-like film 15 are thereby rotated. The conveyance force is given to the. Further, two upper plates 34 are arranged in parallel below the lower end surfaces of the sealer 31, the pressure roller 32, and the pinch roller 33 so as to be along the transport direction. As shown in FIGS. 3 and 4, the two upper plates 34 have a configuration in which one long side 34 a is brought close to each other and a predetermined gap is secured. Then, both side edge portions 15a of the belt-like film 15 protrude upward from the gap between the long sides 34a of the two upper plates 34, and the protruding portions are respectively sealed by the sealer 31, the pressure roller 32, and the pinch roller 33. Pinch.

  The pressure roller 32 also has a function as a pinch roller. That is, since the pressure roller 32 rotates synchronously with the both side edge portions 15a of the belt-like film 15 sandwiched at a predetermined pressure, the conveying force with respect to the both edge portions 15a and the belt-like film 15 is thus achieved. Will give. That is, in this embodiment, it can be said that the structure which arrange | positions a pinch roller before and behind the sealer 31 is taken.

  By making the rotational speed of the pressure roller 32 forward in the traveling direction (speed of the outer peripheral surface in contact with the film) equal to or slightly faster than the rotational speed of the pinch roller 33 (speed of the outer peripheral surface in contact with the film). In addition, the sealer 31 can be passed in a state in which the side edge portions 15a are superposed and taut. In this embodiment, the pinch rollers are arranged on both sides of the sealer 31, but either one may be used. In addition, although the pressure roller 32 has the function of a pinch roller, a configuration in which a pinch roller is arranged separately from the pressure roller in the forward direction of the sealer may be adopted.

  The end seal device 30 seals and cuts the tubular film 24 in a direction orthogonal to the traveling direction, that is, in a transverse direction. The film part to be sealed / cut is a predetermined position between the front and back objects 13 to be packaged. Thereby, by passing through the end seal device 30, the leading portion of the tubular film 24 is separated from the subsequent portion, and the package 35 is manufactured.

  Here, in the present embodiment, the center seal device 27 can be moved along a direction orthogonal to the conveyance direction of the tubular film 24 so that the formation position of the center seal portion 24a can be shifted from the center in the width direction. did. Furthermore, the center seal device 27 can be moved up and down so that the position in the vertical direction can be adjusted according to the height of the article to be packaged, or can be moved up and down greatly during maintenance and other purposes.

  Specifically, the sealer 31, the pressure roller 32, the pinch roller 33 and the upper plate 34 are connected and integrated through a connecting member 38 to the movable base plate 36 which is arranged upright. Therefore, the sealer 31, the pressure roller 32, the pinch roller 33, and the upper plate 34 move together as the moving base plate 36 moves.

  Connection plates 39 are connected to both ends of the front surface of the moving base plate 36 in the longitudinal direction. The connecting plate 39 protrudes outward in the longitudinal direction, and guide shafts 41 are attached to the rear surface of the connecting plate 39 at two locations above and below.

  On the other hand, on the front surface of the machine frame 42 standing on the back side of the apparatus, two guide rails 43 are attached in parallel on the left and right sides (front and rear when viewed in the film transport direction) so as to extend in the vertical direction. A slider 44 is linked to each guide rail 43, and the slider 44 moves up and down along the guide rail 43. A base plate 46 is connected to the front surface of the slider 44 so as to straddle a plurality of sliders 44 linked to the left and right guide rails 43.

  As a result, the base plate 46 moves up and down along the guide rail 46. Although not shown in the figure, this movement may be performed, for example, by connecting a cylinder rod of the cylinder to the base plate 46 and moving up and down by driving the cylinder. A cylinder consists of oil cylinders, for example, and can stop the tip position of a cylinder rod in arbitrary positions. Thereby, for example, when oil is supplied to the lower space side in the cylinder and the cylinder rod is moved upward, the base plate 46 is biased upward and moved upward. This upward movement is performed stably by the guide of the slider 44 and the guide rail 46. On the other hand, when oil is supplied to the upper space in the cylinder from this state (oil is discharged from the lower space), the cylinder rod also moves downward and the base plate 46 also moves downward. Note that the drive source of the mechanism to be moved is not limited to the above-described one, and various modifications may be made such as using a drive motor instead of the cylinder.

  Furthermore, a bearing portion 48 that receives the guide shaft 41 is provided at a predetermined position of the base plate 46. The bearing portion 48 guides the guide shaft 41 to move in the direction when it slides, and is a through-hole having a predetermined length. By attaching each guide shaft 41 to the corresponding bearing portion 48, the movable base plate 36 is linked and integrated with the base plate 46. Therefore, as described above, when the base plate 46 moves up and down as the cylinder is driven, the movable base plate 36 integrated therewith also moves up and down. Accordingly, the sealer 31, the pressure roller 32, the pinch roller 33, and the upper plate 34 that are integral with the moving base plate 36 also move up and down.

  Further, as described above, the guide shaft 41 is guided by the bearing portion 48 and can be stably reciprocated in the axial direction. The moving base plate 36 can reciprocate in a direction parallel to the guide shaft 41, that is, a direction orthogonal to the film transport direction. The moving base plate 36 is moved manually, for example. That is, for example, the sealer 31, the pressure roller 32, the pinch roller 33, and the upper plate 34 are unitized, and a handle or the like is attached to the front side thereof (the opposite side with the machine frame 42, the moving base plate 36, etc. as the back side). The user holds the handle and pulls the entire unit to the near side or pushes it back to move the entire unit in a direction orthogonal to the film transport direction. Following this movement, the moving base plate 36 also moves. As shown in FIG. 3, the moving base plate 36 and the base plate 46 are moved from the far side position where they are flush with each other, as shown in FIG. The plate 36 reciprocates between the base plate 46 and a near side position that protrudes to the near side by a predetermined distance.

  Three holes 39 a are formed in the coupling plate 39 in a direction parallel to the axial direction of the guide shaft 41. A ball plunger 49 to be attached to the hole 39a is attached to the fixed side, for example, the base plate 49 side via a connecting member. As a result, the connecting plate 39 moves along with the movement of the unit / moving base plate 36, and the relative position between the hole 39a and the ball plunger 41 is also displaced. When the hole 39a and the ball plunger 41 face each other, the positioning is fixed. In the present embodiment, since the three holes 39a are provided, positioning is performed at three locations. Specifically, it is positioned and fixed at the back position shown in FIG. 3, the near position shown in FIG. 4, and the intermediate position shown in FIG. In addition, since the positioning and fixing uses the spring force of the ball plunger 41, the positioning and fixing is released by applying a force of a certain level or more, and the unit is moved in the direction in which the force is applied to change the position. Can do.

  When in the intermediate position, the gap between the long sides 34a of the two upper plates 34 is located at the center in the width direction of the cylindrical film 24, and the center seal portion 24a is also centered in the cylindrical film without being misaligned. It is formed. On the other hand, when in the rear side position and the near side position, the center film part is formed by being displaced by a predetermined distance from the center in a predetermined direction.

  After passing through the pressure roller 32, the center seal portion 24a is folded from the base so as to be along the surface of the cylindrical film 24, and is tilted down. Let it be the side.

  As described above, in the present embodiment, the center seal device 27 can be moved in the direction orthogonal to the film transport direction, so that the formation position of the center seal portion 24a is set to the cylindrical film 24 while using one device. The center position in the width direction can be shifted to the left or right. Therefore, it is possible to cope with packaging forms having different formation positions of the center seal portion 24a with a single pillow packaging machine. Further, in the case of a pillow packaging machine in which a gusset forming device is arranged in the vicinity of the end seal device 30 to form a gusset portion, for example, when the center seal portion 24a overlaps with the gusset portion if it remains in the intermediate position, By setting the center seal device 27 to the near side position or the far side position, the center seal portion 24a can be set to a position that does not overlap the gusset portion. Therefore, the number of films to be sandwiched when sealing by the end seal device 30 at the subsequent stage can be suppressed to 2 and 4, and sealing can be performed reliably.

  Further, in this embodiment, the center seal device 27 is moved and positioned and fixed using a manpower and a ball plunger. However, the present invention is not limited to this, and various drive sources and drive mechanisms can be used. For example, it may be a screw type provided with an indicator. Also, the fixed positions are not limited to three, and may be two positions shifted to either one of the center position, or more than four positions. Further, the drive source may be a machine or device such as a cylinder or a drive motor.

  FIG. 6 shows the bag making machine 25. The bag making device 25 of the present embodiment is configured so that the form of the bag making device is changed in accordance with the change of the formation position of the center seal portion 24a. First, the basic configuration of the bag making machine 25 includes a pair of side walls 51 arranged parallel to the film transport direction and at a predetermined interval, and two guide rods 53 connecting the side walls 51. Two moving bases 54 are provided so as to straddle the two guide rods 53. Each moving base 54 has a through hole 54a into which the guide rod 53 is inserted, and is moved by the guide rod 53 in a direction perpendicular to the film transport direction. A left guide plate 52a and a right guide plate 52b are attached to the left and right moving bases 54, respectively. The left guide plate 52a is on the left side in the conveyance direction of the film moving in the bag making machine, and is located on the back side (machine frame 42 side) of the packaging machine. The right guide plate 52b is on the right side in the conveyance direction of the film moving in the bag making machine, and is located on the front side of the packaging machine.

  Furthermore, the moving base 54 has a screw hole formed in the center in the longitudinal direction, and cooperates with the first screw portion 56a and the second screw portion 56b formed on the rotating shaft 56, respectively. The first screw portion 56a and the second screw portion 56b have opposite screw directions, and the two moving bases 54, that is, the left guide plate 52a and the right guide plate 52b are mutually connected as the rotating shaft 56 rotates forward and backward. Approach and leave. At this time, the left guide plate 52a and the right guide plate 52b are located at the same distance from the center line (the center of the cylindrical film) in the transport direction. Furthermore, in this embodiment, the rotating shaft 56 is linked to a drive motor 57 and rotates in response to a rotational force from the drive motor 57.

  Each guide plate 52a, 52b is fixed to the moving table 54 by a lock mechanism 58, and can be removed from the moving table 54 by releasing the lock mechanism 58. Therefore, as shown in FIG. 7, three sets of guide plates are prepared and replaced according to the position of the center seal device 27. Specifically, FIG. 7 (a-1) is the left guide plate 52a when the center seal device 27 is in the back position, and FIG. 7 (a-2) is when the center seal device 27 is in the back position. The right guide plate 52a. FIG. 7B-1 shows the left guide plate 52a when the center seal device 27 is in the intermediate position, and FIG. 7B-2 shows the right guide plate 52a when the center seal device 27 is in the intermediate position. is there. 7 (c-1) shows the left guide plate 52a when the center seal device 27 is in the near side position, and FIG. 7 (c-2) is the right guide plate when the center seal device 27 is in the near side position. 52a.

  Each of the guide plates 52a and 52b for the intermediate position has the same triangular shape. As a result, both side edges of the belt-shaped film rise in the same manner at the same timing, so that both side edge portions 15a of the belt-shaped film 15 overlap at the center of the tubular film when the bag is formed into a cylindrical shape. On the other hand, in the case of the back side position or the near side position, the side edge 15a is displaced in the predetermined direction from the center of the tubular film by making one guide plate triangular and the other guide plate in a single trapezoidal shape. To do. Thereby, as shown in FIGS. 3 and 4, when the center seal device 27 is in a position shifted from the center line of the bag making device 24, the film formed in a cylindrical shape through the bag making device 24. Both side edge portions 15a are smoothly guided into the gap between the long sides 34a of the upper plate 34.

  In the above-described embodiment, the bag making device 25 is open on the upper side, and is set so that both side edge portions 15a of the belt-like film 15 are located on the upper side, and is formed into a cylindrical shape after passing through the bag making device. Although the example applied to the reverse pillow type pillow wrapping machine (reverse pillow wrapping machine) in which both side edge portions are positioned on the upper side has been described, the present invention is not limited to this, and the tubular shape after passing through the bag making machine The present invention is also applied to a normal pillow packaging machine in which both side edge portions of the formed film are located on the lower side. And when applying to such a normal pillow packaging machine, the center seal device will be located below the transport line, and the upper plate will be the lower plate. And the lower board in that case will comprise a conveyance surface, for example, the belt conveyor 26 is good to take the structure arrange | positioned from the downstream of the lower board which concerns.

DESCRIPTION OF SYMBOLS 10 Pillow packaging machine 15 Strip-like film 24 Cylindrical film 25 Bag making machine 27 Center seal apparatus 31 Sealer 32 Pressure roller 33 Pinch roller 34 Upper plate

Claims (3)

A bag-making machine for making a belt-like film continuously supplied from a raw film into a cylinder;
A center seal device that is disposed downstream of the bag making direction of the bag-making machine and seals a portion where both side edges of the film formed in a cylindrical shape are overlapped to form a center seal portion ;
An end seal device that is arranged downstream of the center seal device in the film traveling direction, and seals and cuts the tubular film formed by sealing with the center seal device in the lateral direction;
A pillow wrapping machine comprising:
The center seal device includes a sealer that heats both side edges of the film, and a pinch roller that is disposed on at least one of the front and rear sides of the sealer and moves the film in the forward direction across the side edges. has, a unit with the sealer and the pinch roller, Bei example a moving mechanism for moving in the conveying direction and perpendicular direction of the film,
The bag making machine has a left guide plate and a right guide plate for bending both side edges of the belt-like film on both the left and right sides in the traveling direction of the belt-like film, and the center seal accompanying the movement of the unit by the moving mechanism A pillow wrapping machine characterized in that the shape of the left guide plate and the shape of the right guide plate are made different when the formation position of the portion is shifted from the center position in the width direction of the tubular film .   The pillow packaging machine according to claim 1, further comprising a gusset forming device that forms gusset portions before and after the end seal portion sealed by the end seal device. Wherein the position of said unit set by the moving mechanism, pillow packaging machine according to claim 2, characterized in that the position where the gusset portion and the center seal portion do not overlap.

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