JP6047277B2 - Pillow packaging machine - Google Patents

Description

  The present invention relates to a pillow wrapping machine, and more specifically to a pillow wrapping machine that can wrap even a light product that easily swells.

  The pillow packaging machine continuously feeds a belt-shaped packaging film wound up on a roll of raw material to a bag making machine, and the bag is made into a cylindrical shape when passing through the bag making machine. And the cylindrical packaging film is formed by sealing the packaging film superposition | polymerization end which was bag-shaped and piled up through the bag making machine with the center seal apparatus arrange | positioned in the downstream of a bag making machine. In addition, a product transport / supply device is arranged on the upstream side of the bag making device, and products transported from the product transport / supply device at predetermined intervals are supplied into the bag making device. Thus, when the product passes through the bag making machine, it is stored in the cylindrical packaging film at predetermined intervals, and the product is conveyed together with the cylindrical packaging film. And, in the end seal device arranged on the carry-out side of the pillow packaging machine, the cylindrical packaging film is sealed and cut so as to cross in the horizontal direction at predetermined intervals, whereby a pillow packaging body containing the product is obtained. Manufactured.

  As described above, since the product in the cylindrical packaging film is placed in the cylindrical packaging film, the cylindrical packaging film itself serves as a transport conveyor for the product. It is conveyed following the movement of the film. At this time, the conveyance force for the cylindrical packaging film may be a pinch roller mounted on a center seal device (a film polymerization end that performs center sealing is sandwiched from the left and right by a pair of rollers to provide a conveyance force). . Moreover, the conveyance surface which receives a cylindrical film comprises conveyance apparatuses, such as a belt conveyor, and gives a conveyance force altogether with respect to the bottom face (film part which is contacting the conveyance surface) of a cylindrical film.

  Furthermore, as shown in Patent Document 1, there is a type in which a pulling roller made of a belt conveyor is arranged above and below a cylindrical film, and the product is also sandwiched with the cylindrical film to give a conveyance force to the cylindrical film and the product.

  On the other hand, the outer shape of the pillow package is usually caused by the outer shape of the product to be stored. In other words, when the product is box-shaped, the package is also formed into a box-like shape. However, when a plurality of small articles such as bags and sachets are stored or in the case of a kneaded product, it remains cylindrical. It becomes. In the case where the product has a rectangular shape and is soft, the outer shape of the package is substantially rectangular, but the corners are rounded.

  And in this kind of pillow packaging bag, as a part of increasing the commercial value, what is called a hem seal part is formed by sealing the overlapped part by folding the packaging film so that it overlaps a part of the four corners of the packaging bag. is there. The hem seal portion of the packaging film has an effect of increasing rigidity and maintaining a square cross section because the film portion is folded and sealed. The packaging bag with a hem seal portion is less likely to lose its shape, and the product value can be increased. In this way, the packaging body with a hem seal part acts to maintain its shape when the hem seal part is formed at the four corners, so even if the product is soft or easily crushed, the corners are pinned. It becomes a beautiful appearance shape.

  As a hem seal device for manufacturing a hem seal portion by sealing a predetermined portion of a belt-shaped film being conveyed, for example, there is a device disclosed in Patent Document 2. In the hem seal device disclosed in Patent Document 2, a partition plate is inserted in the film flow direction of the belt-like film being conveyed so that the predetermined portion of the belt-like film is folded outward and the projected film portion is A hem seal portion is formed by sandwiching and heating between a pair of sealers and pressurizing and heat-sealing.

2-148905 WO 01/24999

  When the cylindrical packaging film is sandwiched from above and below and the conveying force is applied to the product together with the cylindrical packaging film as in the invention disclosed in Patent Document 1, the cylindrical packaging film is crushed. In particular, in the case where the product tends to swell, the product will be crushed (compressed and deformed) if an attempt is made to lightly hold the product from above the cylindrical packaging film with the upper and lower pulling rollers. Therefore, as long as the upper and lower pulling rollers are in light contact with the cylindrical packaging film, the upper and lower pulling rollers cannot firmly pinch the cylindrical film and thus the product to give a conveying force. Therefore, the distance between the upper and lower pulling rollers needs to be narrower than the thickness of the unloaded product that can crush the product to some extent. If it does so, a cylindrical packaging film will collapse more largely. As a result, for example, when manufacturing the package body provided with the hem seal part shown by patent document 2, there exists a subject that there exists a possibility that it may become impossible to make a package body neatly squared.

  On the other hand, in order to prevent the cylindrical packaging film from collapsing, a mechanism for holding the product together with the cylindrical packaging film is not provided. There exists a subject that there exists a possibility of moving and producing a position shift.

  Furthermore, even if the product can be transported together with the cylindrical film, air is used to seal and cut a predetermined position of the cylindrical packaging film (the film part where the front and rear products do not exist) in the lateral direction using an end seal device. There is a problem that a bag is generated, and the product located immediately before the end seal device is retracted in the cylindrical packaging film.

In order to solve the above-described problems, the pillow packaging machine of the present invention is (1) a bag making device that forms a continuous belt-like packaging film into a cylindrical shape, and supplies products to the bag making device. A product supply means for transporting, a transport surface for transporting the packaging film formed in the cylindrical shape that is disposed downstream of the bag making machine and encloses the product, and a packaging film formed in the cylindrical shape A pillow wrapping machine comprising a center seal device that seals a polymerization end, and an end seal device that is disposed downstream of the transport surface and seals and cuts in the width direction of the cylindrically formed packaging film. The product comprises a group of articles in which a plurality of articles are laminated, and the strip-shaped packaging film overlaps a part of the film portion corresponding to the four corners of the package manufactured by passing through the end seal device. Fold into A hem seal portion that seals the overlapped portion, and is supplied into the cylindrically formed packaging film by the product supply means and contacts the product that is transported with the cylindrically formed packaging film. Product restraining means for restraining from above is provided, the product restraining means is provided with an endless belt, and restrains the product on a belt surface below the endless belt, and the product restraining means is provided on the bag making machine. The endless belt is configured to be inserted into the cylindrical packaging film from the carry-in side of the product so as to be positioned above the conveying surface, and a tip of the product restraining means is disposed in the vicinity of the end seal device. above the place the top plate, on both sides of the top plate provided with a hanging wall extending downward, the upper portion of the endless belt is enclosed in the hanging wall and the ceiling plate Located in the space, so as not to contact the packaging film formed in the cylindrical, belt surface located on the lower side of the endless belt configured to be positioned below the lower end of the hanging wall .

  Since the product restraining means is inserted and arranged in the cylindrical packaging film and directly restrains the product, the cylindrical packaging film is not crushed. Therefore, even if the product is light and easily swells or the height of the product is lower than the height of the cylindrical packaging film, the product can be suppressed without crushing the packaging film. Furthermore, since the tip of the product restraining means is arranged to the vicinity of the end seal device, the product is lightweight, and when the end seal device tries to seal and cut a predetermined part of the cylindrical packaging film, the product is sandwiched. The air in the space of the film part moves back and forth in the cylindrical packaging film and urges the product in the transport direction and the front-rear direction. Therefore, it does not move backward in the cylindrical packaging film. Therefore, the package can be neatly manufactured without biting the product with the end seal device and without damaging the packaging film.

(2) and the moving speed of the front Symbol belt surface, it may equal the speed of movement of the tubular packaging film. If such a configuration is adopted, the product can be conveyed while being suppressed by the endless belt.

  (3) The height position of the product restraining means contacting the product may be moved up and down. This is preferable because it can correspond to products having different heights.

  (4) The product may be compressible and deformable in a height direction, and the product restraining means may urge the product downward to be crushed. Even in the case of a product that undergoes compression deformation, the product can be conveyed while being crushed without crushing the cylindrical packaging film. Moreover, when the downward urging | biasing from the product suppression means with respect to a product is cancelled | released, a product will return to the original state. Then, the product that has been compressed inside the cylindrical packaging film until just before end sealing is gradually expanded after separating from the product restraining means and returns to the original unloaded state. It is preferable because it will fit neatly inside the body without gaps.

(5) The above (4) assuming the previous SL products supply means may be configured to have a restraining means for unloading in a state of collapsed urges the product downward. This is preferable because it can be supplied in the means for smoothly forming the product into a cylindrical shape, and thus below the product restraining means.

  In this invention, even if it is a light product which is easy to swell, it can be conveyed with a packaging film and packaged neatly while suppressing the product without crushing the packaging film.

It is a front view which shows the packaging machine main body of suitable one Embodiment of the pillow packaging machine which concerns on this invention. FIG. It is the side view. It is sectional drawing of the upstream part of a product control apparatus. It is a figure which shows the delivery part of a product conveyance supply apparatus and a packaging machine main body. It is a schematic front view which shows the packaging machine main body of suitable one Embodiment of the pillow packaging machine which concerns on this invention. It is a front view which shows the structure of an end seal apparatus periphery.

  FIG. 1 is a front view showing a part of a packaging machine body constituting a pillow packaging machine according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a side view of the packaging machine body viewed from the upstream side. FIG. 4 is a cross-sectional view of the upstream portion of the product restraining device that is the main part of the present invention. FIG. 5 is a view showing a delivery part of the product conveying / supplying device and the packaging machine body. FIG. 6 is a schematic front view in which a part of the structure of the packaging machine body in the present embodiment is omitted, and FIG. 7 is a peripheral portion of the end seal device including the upstream tip portion of the product restraining device that is the main part of the present invention. FIG.

  As shown in the figure, the pillow packaging machine 1 is arranged in the order of the product conveying / supplying device 2 and the packaging machine main body 3 from the upstream side, and a belt-shaped packaging film with respect to the packaging machine main body 3 at a predetermined position below the product conveying / supplying device 2 A film supply device for continuously supplying 5 'is provided (see FIG. 5).

  The product transport and supply device 2 is formed of a belt conveyor device 17 that transports the product 4 at regular intervals and sequentially supplies the product 4 to the packaging machine body 3 at the next stage. The product 4 is composed of an article group in which a plurality of replacement paper mop sheets to be mounted on, for example, a paper mop are stacked, and in the present embodiment, one product in a state where two such stacked article groups are in contact with each other in the front and rear. As a product (packaged item), a product composed of two groups of articles arranged before and after the product is packaged by the packaging machine body 3. A product 4 made of a group of articles formed by laminating a plurality of mop sheets is light and easy to swell. Therefore, in a state where no load is applied to the product 4, the product 4 swells and the thickness of the product 4 becomes thick, but by being suppressed from above, it is easily compressed and deformed and crushed. Of course, each mop sheet constituting the product 4 thus crushed returns to its original state.

  In this way, the product 4 in an unloaded state may be bulky, and in order to smoothly supply the product 4 to the packaging machine main body 3 at the next stage, a guide belt is provided above the carry-out side of the product conveyance supply device 2. A device 18 is provided. The guide belt device 18 includes a lower inclined surface portion 18a on the upstream side (carrying-in side) and a horizontal surface portion 18b on the downstream side (carrying-out side). The downward inclined surface portion 18a has a distance from the conveying surface of the belt conveyor device 17 at the opening (inlet) which is the uppermost stream end of the downward inclined surface portion 18a, which is wider than the height of the product 4 in the no-load state, and goes forward in the conveying direction. The distance is gradually reduced. The horizontal surface portion 18b following the front end side of the downward inclined surface portion 18a has a belt surface parallel to the conveying surface of the belt conveyor device 17, and the distance between the two is narrower than the height of the product 4 in the no-load state. Specifically, it is set to be shorter by a predetermined amount than the opening height of the bag making machine 11 serving as a carry-in port for the subsequent packaging machine body 3. As a result, the product conveyed on the product conveying / supplying device 2 passes through the guide belt device 18 and advances while being gradually compressed in the vertical direction, and is sequentially supplied to the packaging machine body 3 at predetermined intervals. Is done.

  Further, by rotating the height adjusting handle 19 forward and backward, the guide belt device 18 moves up and down, and the height position of the horizontal surface portion 18b can be adjusted. Thereby, when the height of the product 4 differs, the height position of the horizontal surface part 18b can be set to an appropriate position according to the height.

  Although not shown in the drawings, the film supply device is for continuously supplying a band-shaped packaging film 5 ′ enclosing the product 4 to the packaging machine body 3. This film supply apparatus includes an original fabric roll obtained by winding a belt-like film 5 'into a roll. The film supply device includes a roller for transporting the belt-shaped packaging film 5 ′ continuously drawn from the original fabric roll through a predetermined transport path and guiding it to the carry-in site of the packaging machine body 3. This roller includes a driving roller that drives the belt-shaped packaging film 5 ', a tension roller that applies tension, and a free roller that changes the transport direction of the belt-shaped packaging film 5' and guides the transport. is there. In the figure, only the roller 10 for drawing to the carry-in part (bag making machine 11) of the packaging machine main body 3 is drawn.

  The packaging machine body 3 includes a bag making device 11 on the carry-in side, and makes a bag into a cylindrical shape by passing the belt-shaped packaging film 5 ′ supplied from the film supply device through the bag making device 11. In this example, the present invention is applied to a so-called reverse pillow packaging machine in which the packaging film 5 'is supplied from below, and both side edges of the packaging film 5' are lifted up and the both side edges are overlapped at the upper center.

  The products 4 sequentially carried out from the product conveyance supply device 2 are supplied into the bag making machine 11. As a result, the product 4 is supplied at predetermined intervals into the packaging fill 5 'which is formed into a cylindrical shape. Thereafter, the product 4 is included in the packaging film 5 which is formed into a cylindrical shape. In this state, it is conveyed with the film.

  A transport conveyor device 12 is disposed on the downstream side of the bag making machine 11. The conveyance conveyor device 12 constitutes a conveyance path for the cylindrical packaging film 5 that encloses the product 4, and is constituted by a belt conveyor. In addition, the endless belt of the transport conveyor device 12 is formed with a large number of holes to form a vacuum conveyor. That is, the cylindrical packaging film 5 that moves on the conveyor device 12 is adsorbed to a number of holes of the endless belt by a suction pump (not shown), and moves forward with more reliable transfer force.

  A center seal device 13 is disposed at a predetermined position above the conveyor device 12. The center seal device 13 seals a portion (center seal) where the both side edges of the packaging film 5 ′ passed through the bag making machine 11 and formed into a cylindrical shape are overlapped. The center seal device 13 includes a pair of pinch rollers 13b that sandwich and convey a portion where both side edges of the packaging film 5 formed into a cylindrical shape are overlapped, and a portion where the overlap is sandwiched from both sides. A pair of bar-shaped center sealers 13a to be heat-sealed, and the overlapped portion of the side edges of the film that has been heated and melted are pressurized and cooled to complete the heat seal. A pair of press rollers 13c. Here, the bar-shaped center sealer 13a is used, but there are also ones constituted by a pair of rotating rollers, and various structures can be taken.

  Further, an end seal device 14 is disposed in front of the conveyance conveyor device 13 in the traveling direction. Thereby, the predetermined position (portion where the product 4 does not exist) of the cylindrical packaging film 5 is correctly sealed and cut by the end seal device 14, and the occurrence of product biting is suppressed.

  The end seal device 14 includes a pair of upper and lower top sealers 14a and 14b that are vertically opposed to each other and are arranged in parallel so as to extend in a direction orthogonal to the film transport direction. The upper top sealer 14a has a lower surface as a sealing surface, and the lower top sealer 14b has an upper surface as a sealing surface. Further, a cutter blade is incorporated below the upper top sealer 14a. The top sealers 14a and 14b revolve around a predetermined trajectory by moving up and down or moving up and down while maintaining the state in which the seal surfaces face each other (box motion type). Such revolving movement is controlled and driven by a driving device 14c having a cam mechanism as shown in FIG. While sealing the desired site | part (between the front and back products 4) of the cylindrical packaging film 5 from the upper and lower sides and heat-sealing, the cylindrical packaging film 5 is cut in a horizontal direction with a cutter blade. Thereby, the front-end | tip part (part which includes the top product 4) of the cylindrical packaging film 5 is isolate | separated, and the package body 6 is manufactured. Then, the package 6 is conveyed on the carry-out conveyor device 16.

  End seal devices of various structures can also be used. Instead of the box motion type described above, a pair of top sealers may be moved up and down on the spot (not moved back and forth), or arranged vertically. A top sealer may be attached to each of the rotation shafts, and a rotation type in which the sealer surfaces at the tips of both top sealers come into contact with each other and seal / cut each time the rotation shaft (top sealer) makes one rotation. Furthermore, the present invention can be applied to various types such as a cutter unit configured separately from a sealer.

  On the downstream side of the end seal device 14, a package body holding and conveying device 15 is disposed. The package body holding and conveying device 15 includes a pair of upper and lower conveyors, and the lower conveyor receives and conveys the cylindrical packaging film 6 (product 4 built-in) that has passed through the end seal device 14 to the carry-out conveyor device 16. Is. Further, the upper conveyor of the packaging body restraining and conveying device 15 restrains the leading end portion of the packaging film 5 and the lifting of the product 4 (the portion that becomes the packaging body 6 after end sealing). And this package body holding | suppressing conveyance apparatus 15 also becomes a vacuum conveyor, and attracts and hold | maintains the packaging film 5 which contacts a belt surface.

  Further, the downstream end of the conveyor 12 and the upstream end of the packaging body restraining and transporting device 15 are linked to the end seal device 14, and the leading end positions of the top sealers 14 a and 14 b are synchronized with the front and rear and vertical movements. Moving. Thereby, when the top sealers 14a and 14b are opened, the downstream end of the transport conveyor 12 and the upstream end of the package body restraint transport device 15 approach, and the packaging film 5 and the product 4 move smoothly.

  Here, in the present invention, a product restraining device 20 that restrains the product 4 in the packaging film 5 is provided. The product restraining device 20 can directly restrain the product 4 in the packaging film 5 and further keeps the state restrained to the immediate vicinity of the end seal device 14. Specifically, first, the product restraining device 20 includes a plurality of pulleys 22 arranged at appropriate positions and an endless belt 21 that spans the drive pulley 23. A part of the plurality of pulleys 22 and the drive pulley 23 are supported by bearings on a pair of side walls 25 erected above both sides of the upstream opening (carrying inlet) of the bag making machine 11.

  The pair of side walls 25 are connected to and integrated with the connecting plate 28 at the upper end (front side). The distal end of the connecting plate 28 is fixed to a support plate 29 erected in parallel with the transport direction. The support plate 29 is attached with a slider 33 connected to the screw shaft 26 on the back side thereof. Then, when the handle 27 connected to the upper end of the screw shaft 26 is rotated forward and backward, the slider 23 is moved up and down, and the connecting plate 28 and the various pulleys 22 and 23 are moved up and down following the movement. The endless belt 21 also moves up and down. Further, the upper and lower ends of the screw shaft 26 are supported by the machine frame 30.

  A top plate 40 having a substantially planar plane is connected to the lower side of the front end side of the pair of side walls 25. The top plate 40 has a support plate 32 standing upright at a predetermined position on the upper surface, and is connected to a connection plate 31 extending in the lateral direction (perpendicular to the conveying direction) on the upper rear surface of the support plate 32. The distal end of the connecting plate 31 is fixed to the support plate 29.

  On the other hand, the top plate 40 is inserted into the bag making machine 11, and the tip thereof is disposed in the vicinity of the end seal device 14. A gap is provided between the top surface of the inner peripheral surface of the bag making device 11 and the top plate 40, and the belt-shaped packaging film 5 ′ supplied to the bag making device 11 is the inner peripheral surface of the bag making device 11. And the top plate 40 are inserted into the gap.

  Therefore, the top plate 40 is inserted and disposed in the packaging film 5 that is passed through the bag making machine 11 and is formed into a cylindrical shape. Furthermore, a drooping wall 41 extending downward is provided on both sides of the top plate 40. Here, the hanging wall 41 is integrally formed by bending both sides of the top plate 40, but a separate one may be attached. A plurality of pulleys 22 are supported and supported by the hanging wall 41 provided on both the left and right sides at the tip and intermediate positions. Each pulley 22 is arranged to extend in a direction orthogonal to the conveyance direction of the tubular film 5 (product 4). The endless belt 21 is also wound around the pulley 22.

  Further, the drive pulley 23 and the pulley 22 supported by bearings on the side wall 25 and the endless belt 21 hung on the pulley 22 supported by bearings on the hanging wall 41 have a layout configuration that moves in the lower space of the top plate 40. take. Thereby, the endless belt 21 reaches deep inside the cylindrical packaging film 5 (in the vicinity of the end seal device 14). In addition, the endless belt 21 in the cylindrical packaging film 5 is exposed at the lower side to face the product 4 and can be contacted, but the upper side is covered with the top plate 40 and the cylindrical packaging film 5 and the endless belt. 21 becomes non-contact.

  The endless belt 21 has a lower belt surface that moves in the same direction as the transport direction of the packaging film 5 and the product 4, so that the upper belt surface moves in the opposite direction to the transport direction. The belt surface located on the upper side is covered with the top plate 40 and does not contact the packaging film 5. Further, both sides of the belt surface located on the upper side do not contact the inner peripheral surface of the cylindrical packaging film 5 because of the hanging wall 41.

  The endless belt 21 receives the driving force of the driving pulley 23 and rotates. The drive pulley 23 is rotated by receiving the rotational force of a drive motor (not shown), and the moving speed of the belt surface of the endless belt 21 is equal to the conveying speed of the packaging film 5 (product 4).

  Further, the distance between the lower belt surface of the endless belt 21, the transport surface of the transport conveyor device 13, and the bottom surface on the inner peripheral side of the bag making machine 11 is made smaller than the height of the product 4 when there is no load. Yes. Specifically, it is set to be approximately equal to or slightly wider than the distance between the horizontal surface portion 18 b of the guide belt device 18 and the conveying surface of the belt conveyor device 17.

  As a result, the product 4 carried out in a compressed state from the product conveyance supply device 2 is smoothly supplied from the bag making device 11 to the lower space of the product restraining device 20 while maintaining the compressed state. The product 4 supplied to the lower space of the product restraining device 20 is restrained by the product restraining device 20 (endless belt 21) in the compressed state. That is, the product 4 is firmly suppressed between the lower surface of the endless belt 21, the transport surface of the transport conveyor device 13, and the inner peripheral side of the bag making device 11 (the product 4 is in a compressed state).

  Since the end of the endless belt 21 that suppresses the product is positioned in the vicinity of the end seal device 14, the suppression of the product 4 by the product suppressor 20 continues until the product 4 comes close to the end seal device 14. (See FIG. 7 and the like). Then, as shown in the drawing, the tip of the cylindrical packaging film 5 is located downstream of the end seal device 14, and the film portion where the product 4 does not exist has come between the pair of top sealers 14 a and 14 b of the end seal device 14. The top sealers 14a, 14b sandwich the cylindrical packaging film 5 at the timing. Along with this, the air in the cylindrical packaging film 5 before being sandwiched moves back and forth to urge the product 4, but the product 4 is firmly compressed by the endless belt 21 of the product restraining device 20. Therefore, the product 4 does not move backward.

  Further, the product 4 is thus directly contacted by the endless belt 21 and receives a conveying force in a compressed state. At this time, the cylindrical packaging film 5 is not crushed because the force in the direction of being crushed from the outside does not work.

  Therefore, for example, as shown in Patent Document 2 and the like, even when hem seal portions are formed at the four corners of the packaging film 5, the packaging film 5 is not restrained by the product restraining device 20, so that the hem seal portion is also clean. To maintain.

  In the above-described embodiment, the belt surface that contacts the product of the endless belt 21 of the product restraining device 20 is made almost horizontal, and the product 4 restrained by the product restraining device 20 is restrained by a substantially uniform force over the entire length. However, the present invention is not limited to this, and the whole or a part may be inclined, and the holding force may vary depending on the location. For example, the position of the belt surface may be lowered toward the front in the conveying direction, and the product may be gradually compressed. Furthermore, the rear end side of the belt surface is an inclined surface that is obliquely lifted, and the height position of the rear end (loading side) is preferably the same as or higher than the height when the product 4 is in an unloaded state. . If it does in this way, the function of guide belt device 18 can be combined. In that case, a layout in which the position of the belt surface on the rear end side is predicted to extend up to the upper side of the carry-out side end of the product conveyance supply device 2 may be adopted.

DESCRIPTION OF SYMBOLS 1 Pillow packaging machine 2 Product conveyance supply apparatus 3 Pillow packaging machine main body 5 Band-shaped film 11 Bag making machine 14 End seal device 18 Guide belt device 20 Product restraint device 21 Endless belt 22 Pulley 23 Drive pulley

Claims (5)

A bag-making machine for forming a continuously-formed belt-like packaging film into a cylindrical shape;
Product supply means for supplying a product to the bag making device;
A conveyance surface for conveying the packaging film formed in the cylindrical shape, which is disposed on the downstream side of the bag making machine and encloses the product;
A center seal device for applying a seal to the polymerization end of the cylindrically formed packaging film;
A pillow wrapping machine provided with an end seal device that is disposed downstream of the transport surface and seals and cuts in the width direction of the cylindrically formed packaging film,
The product consists of an article group in which a plurality of articles are laminated,
The belt-shaped packaging film has a hem seal portion that seals the overlapped portion by folding so as to overlap a part of the film portion corresponding to the four corners of the package manufactured through the end seal device,
A product restraining means that comes into contact with the product that is fed into the cylindrically formed packaging film by the product feeding means and that is transported together with the cylindrically formed packaging film, and that suppresses from above is provided.
The product restraining means includes an endless belt, and restrains the product on a belt surface below the endless belt,
The product restraining means is inserted into the cylindrical packaging film from the carry-in side of the product of the bag making device and positioned above the transport surface, and the tip of the product restraining means is in the vicinity of the end seal device Configured to be placed in
A top plate is disposed above the endless belt, and both sides of the top plate are provided with a hanging wall extending downward, and an upper portion of the endless belt is located in a space surrounded by the top plate and the hanging wall. The belt surface positioned on the lower side of the endless belt is positioned below the lower end of the hanging wall so as not to contact the packaging film formed in the cylindrical shape. Pillow wrapping machine.   The pillow packaging machine according to claim 1, wherein the moving speed of the belt surface is equal to the moving speed of the cylindrical packaging film.   The pillow packaging machine according to claim 1 or 2, wherein a height position of the product restraining means contacting the product is movable up and down. The product is compressible and deformable in the height direction,
The pillow packaging machine according to any one of claims 1 to 3, wherein the product restraining means urges the product downward to be crushed.   The pillow wrapping machine according to claim 4, wherein the product supply means includes a restraining means for urging the product downward and carrying it out in a crushed state.

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