JP5426584B2 - Film folding apparatus and automatic packaging machine - Google Patents

Description

The present invention relates to a film folding apparatus for forming a fold in the length direction of a film installed in an automatic packaging machine.

  As is well known, the pillow wrapping machine forms a continuously drawn belt-like film into a cylindrical shape using a bag making machine. As a result, both side edges of the belt-like film are polymerized, so that the polymerization ends are sealed with a center seal device, and a cylindrical film is formed. On the other hand, since the articles to be packaged are sequentially supplied into the bag making machine at regular intervals, the articles to be packaged are also included in the cylindrical film at predetermined intervals, and the cylindrical film and the articles to be packaged are kept in this state. Will be transported. Furthermore, an end seal device is installed on the downstream side of the center seal device, and a predetermined position of the cylindrical film is sealed in the lateral direction of the traveling direction and cut to produce a pillow package that seals the package. It has become.

4-35503

  However, the above-described conventional apparatus has the following problems. In other words, the outer shape of the pillow package is caused by the outer shape of the package. In other words, when the packaged item is box-shaped, the package is also formed into a box-like shape. However, when storing a plurality of small articles such as bags and small bags, Will remain.

  Accordingly, since the end-sealed ear portions exist at both ends of the tubular film, the package cannot be displayed independently. And, when trying to stand up, for example, a plurality of packaging bodies are stored in a standing state in a box or the like. In such a case, when a predetermined number of stored packaging bodies are removed, the remaining packaging body Can't stand alone and falls in the box.

The present invention has been made in view of the above-described background, and an object of the present invention is to provide a film folding apparatus capable of reliably folding a film in the length direction of the film .

The film folding apparatus according to the present invention is (1) a film folding apparatus that folds a belt-like film continuously supplied to the packaging machine body at a predetermined position along the traveling direction of the belt-like film. A first brazing roller and two second brazing rollers disposed opposite to each other with the belt-like film interposed therebetween, on the outer peripheral surfaces of the first brazing roller and the second brazing roller A convex groove is formed on one side along this, and a concave groove matching the convex line is formed on the other side, and the two second brazing rollers are moved back and forth along the transport direction of the belt-like film. The two second brazing rollers are simultaneously in contact with the strip film and pressurize the contact portion of the strip film with the contact pressure between the first brazing roller and the second brazing roller. Place back and forth The was the two second shaping roller in the same film portion, configured to press twice, the first shaping roller is connected to a drive motor, receiving the rotational output of the drive motor It was made to rotate .
(2) A plurality of sets of the first brazing roller and the two second brazing rollers are provided.
(3) An automatic packaging machine according to the present invention includes a means for forming a belt-like film into a cylindrical shape, a center sealing device that seals the overlapping end of the cylindrical film formed in the cylindrical shape, and the center sealing device. In the automatic packaging machine provided with the end seal apparatus which arrange | positions in the downstream and seals and cuts in the width direction of the said cylindrical film, The upstream of the means to form in the said cylinder shape, Claim 1 or 2 The film folding apparatus described above was provided, and the folds formed by the film folding apparatus were formed at least at the corners of the manufactured package.
An automatic wrapping machine as a reference example includes a means for forming a continuously drawn belt-like film into a cylindrical shape, a center seal device that seals the polymerization end of the cylindrical film formed in the cylindrical shape, and the center seal In an automatic packaging machine provided with an end seal device that is disposed downstream of the device and seals and cuts in the width direction of the tubular film, the belt-like film is disposed upstream of the tubular forming means. A film folding apparatus for folding the direction perpendicular to the traveling direction was provided.

  The crease formed by the film folding apparatus may be formed along an end seal portion that is sealed by the end seal apparatus. Furthermore, the crease formed by the film folding apparatus may be formed so as to cross the belt-like film.

  When a film folding device (second film folding device) is provided, a crease may be attached to a predetermined position of the film on the ear portion side where the folds are attached by the folding claws provided in the end seal device. It is possible to fold the film neatly by the crease and to make the bottom surface of the package substantially flat.

  The end seal device used in the above automatic packaging machine includes, for example, a means for forming a continuously drawn belt-like film into a cylindrical shape, and a center seal that seals the polymerization end of the cylindrical film formed in the cylindrical shape. It is premised on the end seal device used in an automatic packaging machine provided with a device and an end seal device that is disposed downstream of the center seal device and seals and cuts in the width direction of the tubular film. A pair of upper and lower end sealers which are arranged so as to be movable up and down with the sealing surfaces facing each other, sandwich the cylindrical film from above and below, and can end-seal the cylindrical film laterally; , A cutter which is disposed on at least one of the lower end sealers and cuts the tubular film in a lateral direction, a first folding hook claw attached to the upper end sealer, and a second attached to the lower end sealer. With crease claws. Further, the first and second crease claws are arranged to face each other, and at least one of the crease pawls protrudes from the sealing surface of the attached end sealer, and the upper and lower end sealers When the tubular film is sandwiched, the first and second crease claws sandwich the position along the end-sealed portion of the tubular film, and extend in the lateral direction of the tubular film. It was configured to have a heel. And the opposing surface of the said 1st, 2nd crease claw is good to make it an inclined surface.

  Since folds are attached along the end seal part (ear part) of the package, for example, when the package is stored in a box, it is stored with the ear part side with the folds down. The ear portion can be folded beautifully at the crease portion, and the bottom surface of the package can be made substantially flat. Therefore, it can be made independent.

  In addition, as a reference example, an automatic packaging machine includes, for example, a means for forming a continuously drawn belt-like film into a cylindrical shape, and a center seal device that seals a polymerization end of the cylindrical film formed in the cylindrical shape. An automatic wrapping machine provided with an end seal device that is disposed downstream of the center seal device and seals and cuts in the width direction of the tubular film is assumed. The end seal device is arranged so as to be movable up and down with the sealing surfaces facing each other, and a pair of upper and lower portions sandwiching the cylindrical film from above and below and enabling the end sealing of the cylindrical film in the lateral direction An end sealer, and a first crease pawl attached to the upper end sealer and a second crease pawl attached to the lower end sealer, wherein the first and second crease pawls The end of at least one of the folding claws protrudes beyond the sealing surface of the attached end sealer, and the upper and lower end sealers sandwich the tubular film when the First and second crease claws sandwich the position along the end-sealed portion of the tubular film and attach a crease extending in the lateral direction of the tubular film. Configured to.

  On the premise of such a configuration, a first film folding device for folding a predetermined position along the traveling direction of the belt-like film is provided on the upstream side of the cylindrical forming means.

  When the first film folding apparatus is provided, folding corners can be attached to the four corners of the package, and the outer shape of the package can be formed in a substantially rectangular shape regardless of the shape of the package. Furthermore, when forming a gusset, a beautiful gusset is formed by attaching a crease to the position of the gusset, and the ear portion is easily bent.

As described above, in the film folding and folding apparatus and the automatic packaging machine according to the present invention, since the two second folding rollers are provided for one first folding roller, the same film part to be folded is used. It will be pressed twice, and it will be possible to make a crease.

In addition, when the folds are attached in the lateral direction of the belt-like film, the folds can be attached to the bottom side of the package over the entire circumference, and the film can be folded beautifully with the folds. A beautiful flat bottom surface can be formed.

It is a figure which shows an example of the pillow packaging machine with which the film folding apparatus which concerns on this invention is applied. It is a perspective view which shows the principal part of a gusset formation apparatus. It is a front view which shows the principal part of a gusset formation apparatus. Is an enlarged view showing a preferred embodiment of the ene Doshiru device. It is a figure which shows an example of the package manufactured with the pillow packaging machine. It is a package which shows a use condition. It is a figure which shows the principal part of another pillow packaging machine. It is a figure which shows an example of the 1st film folding apparatus which concerns on this invention . It is a figure which shows the 1st, 2nd film folding apparatus. It is a figure which shows the 1st, 2nd crease roller. It is a figure which shows the 1st, 2nd crease roller. It is a figure which shows the crease formed in the strip | belt-shaped film. It is a figure which shows the package formed by attaching a crease. It is a package which shows a use condition.

  FIG. 1 shows a preferred embodiment of the present invention. In this embodiment, an example applied to a pillow packaging machine is shown. As shown in the figure, the belt-like film 11 is continuously drawn out from the original fabric roll 12 through a number of tension rollers 13 and guided to the bag making machine 14. Then, by passing through the bag making device 14, the belt-like film 11 is formed into a tubular shape and becomes a tubular film 15.

  On the other hand, a supply conveyor 16 is disposed on the rear side (upstream side) of the bag making device 14 in the advancing direction, and the supply conveyor 16 is disposed so that the carry-out end is located near the entrance of the bag making device 14. . The supply conveyor 16 includes an endless chain 18 provided between a pair of sprockets 17 and 17 ′, and fingers 19 disposed at predetermined intervals of the endless chain 18. And the to-be-packaged object 20 is pushed in with this finger 19, and the to-be-packaged object 20 is sequentially transferred in the above-mentioned cylindrical film 15 for every predetermined interval.

  Further, the article 20 to be packaged pushed by the finger 19 moves together with the cylindrical film 15, is heated by the center seal device 21 arranged in the next stage of the bag making machine 14, and is transferred in the middle of the cylindrical film. Fifteen film polymerization ends 22 are heat-sealed to be center-sealed.

  And the cylindrical film 15 to which the center seal is applied is further advanced and sealed and cut in the advancing direction lateral direction by the end seal device 24 disposed in the next stage so that the package 25 is manufactured. It has become. Further, in this embodiment, the end seal device 24 is a so-called box motion type, and the pair of upper and lower end sealers 24a and 24b revolve around a predetermined trajectory with the seal surfaces always facing each other. Then, a predetermined position of the cylindrical film 15 is sealed and cut.

  That is, first, when the end seal position of the tubular film 15, that is, the portion where the article to be packaged 20 does not exist, is located at the opposite position of the upper and lower end sealers 24 a and 24 b, the end sealers 24 a and 24 b are moved to the tubular film 15. Move towards and pinch from above and below. Next, while maintaining the sandwiched state, the tube 15 is moved horizontally in accordance with the movement of the tubular film 15 for a predetermined time. During this movement, the tubular film 15 is heated and reliably heat-sealed. Thereafter, the end-sealed portion of the tubular film 15 that has been heat-sealed is cut in a lateral direction by a cutter disposed in the upper end sealer 24a, and the tubular film at the tip (downstream of the end-seal device 24) is separated and packaged The body 25 is manufactured. Next, both end sealers 24a and 24b move away from the tubular film 15 (end seal portion) and move in the direction opposite to the moving direction of the tubular film 15 to return to the original position, and the next end seal processing is performed. It comes to be prepared.

  In addition, the carry-out conveyor 26 arranged so as to straddle the end seal device 24 and extend to the downstream side moves so that the space portion 26a moves in synchronization with the forward and backward movement of the end sealers 24a and 24b. The cylindrical film 15 and the packaged article 20 passing through the end seal device 24 can be moved smoothly. Such a configuration is the same as that of a normal pillow packaging apparatus.

  In this embodiment, as the box motion type, both end sealers 24a and 24b are moved forward with the movement of the tubular film. However, the present invention is not limited to this, and both end sealers only move up and down. It may be what you do. In this case, the cylindrical film is intermittently conveyed, and when the cylindrical film is sandwiched between both end sealers, the conveyance is temporarily stopped. Of course, even in the box motion type end seal device, the film may be conveyed intermittently.

  In this embodiment, the gusset forming device 30 is provided before and after the end seal device 24. As shown in FIG. 2, the gusset forming device 30 includes gusset claws 31 located on both sides of the side surface of the tubular film 15 and a drive mechanism (not shown) that moves the gusset claws 31.

  This gusset claw 31 is connected to both end sealers 24a, 24b, and moves back and forth integrally while maintaining a desired position in the height direction. Of the tubular film 15, the packaged item 20 is stored. While the portion is passing, it moves to the outside from the position shown in the figure, and its tip 31 a is located at a standby position further outside the side surface of the tubular film 15.

  As shown in the figure, when the relative positions are such that the articles 20 to be packaged exist before and after both end sealers 24a and 24b, and only the tubular film 15 exists between both end sealers 24a and 24b. Each gusset claw 31 moves toward the inner side (tubular film side). And the front-end | tip 31a contacts the side surface of the cylindrical film 15, and pushes it inward, The gusset (fold) 33 like illustration is formed in the side surface of the cylindrical film 15. FIG.

  Further, the movement of the gusset claw 31 in and out is performed by, for example, attaching a plate cam 35 to the upper end sealer 24a and bringing the cam surface 35a of the plate cam 35 into contact with the proximal end 31b of the gusset claw 31 as shown in FIG. . Further, the gusset claw 31 is applied with a force to move outward by a spring (not shown). Then, when both the end sealers 24a and 24b are separated (the upper end sealer 24a is raised), the tip 31a of the gusset claw 31 is located outside the cylindrical film 15 as shown in the figure, and from this state, the upper end When the sealer 24a is moved downward, the plate cam 35 is also moved downward, so that the gusset claw 31 is pushed inward by the cam surface 35a and advances inward as shown by a two-dot chain line. Thereby, the side surface of the cylindrical film 15 is pushed in and the gusset 33 is formed. Note that the above-described configurations are the same as those conventionally known, and thus detailed description thereof is omitted.

  Here, in the present invention, as shown in FIG. 4, flat first and second folding hooking claws 36 and 37 are attached to the upstream side surfaces of both end sealers 24a and 24b. The first folding brazing claw 36 attached to the upper end sealer 24a has an inclined surface 36b whose lower end 36a protrudes downward from the lower end sealer surface of the upper end sealer 24a and is separated from the upper end sealer 24a as it goes downward. Have

  On the other hand, the second crease claw 37 attached to the lower end sealer 24b is inclined so that the upper end 37a is substantially at the same position as the upper end sealer surface of the lower end sealer 24b and further away from the lower end sealer 24b as it goes downward. It has a surface 37b. And both inclined surfaces 36b. The inclination angle of 37b is made to correspond substantially.

  As a result, as shown in FIG. 5B, when both end sealers 24a and 24b come close to each other and the tubular film 15 is sandwiched in the lateral direction and sealed and cut, both folding claws 36 and 37 are attached. And the cylindrical film 15 is sandwiched. Accordingly, the position immediately before the end-sealed portion of the tubular film 15 is bent along the inclined surfaces 36b and 37b, so that a crease is provided so as to cross the film. In addition, when both the folding claws 36 and 37 are made of a material having good thermal conductivity such as metal, the temperature of the both folding claws 36 and 37 rises to some extent due to the heat of the end sealers 24a and 24b. Therefore, since the cylindrical film 15 is pressurized while being heated, the crease is more firmly attached.

  It should be noted that when the folds are attached by sandwiching the immediate vicinity of the end seal portion of the tubular film 15 by the both fold-fitting claws 36 and 37, other portions of the tubular film (packaged article 20) 15 are more than necessary. A holding member (not shown) that holds down the tubular film 15 from above is also installed at a position near the upstream side of the end seal device 24 so as not to be lifted.

  Thereby, as shown in FIG. 5, the package 25 separated from the tubular film 15 by passing through the end seal device 24 forms a crease 39 at an end seal portion (ear portion) 25a in the forward direction of travel. Is done. Therefore, for example, when the packaging body 25 is placed with the ear 25a on which the fold 39 is formed in the box placed, the ear 25a bends neatly along the fold 39 and stands as shown in FIG. The bottom surface in a state becomes flat, and the packaging body 25 that can stand on its own in a stable state is formed.

  In the above-described embodiment, the first and second crease claws 36 and 37 are attached to the upstream side surface of the end sealers 24a and 24b. Of course it is good.

  FIG. 6 shows a second embodiment of the present invention. This embodiment is based on the first embodiment described above, and can be self-supporting as shown in FIG. 6 by attaching a film crease at a predetermined position to the belt-like film 11 before being guided to the bag making machine 14. This makes it possible to manufacture a neat package more beautifully.

  Specifically, first, in the present embodiment, the first film folding device 40 is arranged in the middle of the path to be supplied to the bag making device 14. The first film folding device 40 is a device for folding paper in parallel along the traveling direction of the belt-like film 11. Specifically, as shown in an enlarged view in FIG. 8, a large-diameter disk-shaped first brazing roller 41 and two small-diameter disk-shaped second brazing rollers that are opposed to each other with the belt-like film 11 interposed therebetween. 42 is provided. The first brazing roller 41 and the second brazing roller 42 are respectively attached to machine frames 43 and 44 that also serve as bearings, and the respective brazing rollers 41 and 42 rotate and move with the movement of the machine frames 43 and 44. , Move together.

  Specifically, the machine frame 44 to which the second brazing roller 42 is attached has a slider 45 attached to the lower side on the outer side (opposite the installation location of the second brazing roller 42). The guide rail 46 is attached to the side wall 47 so as to reciprocate along the guide rail 46. The guide rail 46 extends in the horizontal direction, that is, in a direction orthogonal to the traveling direction of the strip film 11. Therefore, when the slider 45 is moved, the machine frame 44 and thus the second brazing roller 42 move in the lateral direction with respect to the belt-like film 11. That is, by this movement, the distance from the side edge of the position where the second brazing roller 42 contacts the belt-like film 11 toward the center can be adjusted.

  Further, the first brazing roller 41 is attached to a rotating shaft 49 supported by a bearing on the machine frame 43, and the attachment position is movable in the axial direction. As a result, the first brazing roller 41 moves in the lateral direction (relative to the belt-like film 11) in accordance with the movement of the corresponding second brazing roller 42, and the both brazing rollers 41, 42 come into contact with each other to form the belt-like film. 11 arbitrary positions can be sandwiched with a predetermined pressure. Further, the machine frame 43 is connected to one end of the support arm 48 at a lower position thereof, and can rotate forward and backward around the other end 48a of the support arm 48 (see FIG. 7).

  Further, the rotation shaft 49 to which the first brazing roller 41 is attached is connected to a drive motor (not shown) and rotates in accordance with the transport speed of the belt-like film 11. The second brazing roller 42 is in a free state, and receives the rotational force of the first brazing roller 41 that rotates with the rotation of the rotating shaft 49 (during the operation, the second brazing roller 42 passes through the belt-like film 11). ) It is designed to rotate.

  Further, the first brazing roller 41 and the second brazing roller 42 come into contact with each other with a predetermined pressure, and the contact portion of the belt-like film 11 is pressed with the contact pressure to crease the crease.

  Although not specifically shown, the center side of the periphery of the first brazing roller 41 (the contact portion with the second brazing roller 42) is a curved surface projecting outward, and the projection further projecting to the center position. Articles are formed. The second brazing roller 42 that is paired with this has a concave groove formed at the center position of its peripheral edge (contact portion with the first brazing roller 41), although not shown. Then, the contact part of the strip | belt-shaped film 11 pressurized with the said brazing rollers 41 and 42 is deform | transformed so that it may protrude in the 2nd brazing roller 42 side with a protrusion.

  Conversely, when a concave groove is formed at the center position of the peripheral edge of the first brazing roller 41 and a ridge is provided at the central position of the peripheral edge of the second brazing roller 42 opposed thereto, the both brazing rollers 41 , 42 is deformed so as to project toward the first brazing roller 41 side by the ridges.

  Thus, when a part of the flat belt-like film 11 is deformed into a concave shape, it becomes easy to bend along the deformed portion, and a crease is attached. And in this form, since it applies to the pillow packaging machine which manufactures a package with a gusset, the film part which can fold the strip | belt-shaped film 11 is three on one side of a package, and a total of six folds are carried out. I will put a spear.

  That is, as shown in FIG. 9, six pairs of rollers 41 and 42 are arranged along the axial direction of the rotation shaft 49 (lateral direction of the strip film 11). In addition, the type of each of the rollers 41 and 42 such that one on the center of one side forming the gusset is a valley fold and the other two are mountain folds (which roller uses a ridge) Determine and place.

  Further, in this embodiment, since the two second wrinkle rollers 42 are provided for one first wrinkle roller 41, the same film portion to be folded is pressed twice, so that the folds can be surely folded. Can be attached. In addition, the basic composition of the 1st film folding apparatus 40 which concerns can use the thing similar to the apparatus well-known by Japanese Utility Model Publication No. 7-23361 etc., for example.

  Further, in the present embodiment, the second film folding device 50 for folding the strip-shaped film 11 so as to cross the direction perpendicular to the traveling direction, that is, the lateral direction is provided. The second film folding device 50 is installed on the upstream side (the original roll 12 side) of the first film folding device 40 in this embodiment, but may be attached on the downstream side.

  As shown in FIG. 7, the second film folding apparatus 50 includes a first folding / crimping roller 51 and a second folding / crimping roller 52 that are disposed opposite to each other with the strip-shaped film 11 moving in the horizontal direction interposed therebetween. It has. As shown in FIGS. 9 and 10, the first folding roller 51 includes a cylindrical rotating body 51 a that is longer than the width of the belt-like film 11 and a first protruding and arranged on the outer peripheral surface of the rotating body 51 a. It has one fold part 51b. Similarly, the second crease roller 52 has a cylindrical rotator 52a that is longer than the width of the belt-like film 11, and a second crease portion 52b that protrudes from the outer peripheral surface of the rotator 52a. Yes.

  As shown in FIGS. 10 and 11, the first fold part 51 b has a convex part 51 c that pushes in the belt-like film 11 that comes into contact, and the second fold part 52 b has a concave part 52 c that coincides with the convex part 51 c. Have. Further, the first and second folding and folding rollers 51 and 52 rotate in synchronization with each other, and the first and second folding and folding portions 51b and 52b come into contact with each other in timing, and sandwich the belt-like film 11 from above and below with a predetermined pressure. It becomes like this. Thereby, the strip | belt-shaped film 11 is pressed by the convex part 51c, and a crease is attached so that it may cross | intersect a horizontal direction.

  In addition, as shown in FIG. 11, in a state where the convex portion 51c and the concave portion 52c are not in contact with each other, a predetermined gap is formed between the rotating bodies 51a and 52a of the first and second folding and crimping rollers 51 and 52. Therefore, the strip-shaped film 11 moves smoothly in the gap. Therefore, by rotating the rotating bodies 51a and 52a intermittently while matching the timing of the movement of the belt-like film 11, a crease can be attached in a lateral direction at an arbitrary position of the belt-like film 11. Specifically, the position where the signature is applied is the side that comes to the lower side (bottom) in the final package.

  In addition, since the packaging machine main body (each seal device, gusset forming device, crease claw, etc.) installed on the downstream side of the supply conveyor 16 and the bag making device 14 is the same as that of the first embodiment described above, Illustration is omitted.

  If comprised as mentioned above, since the strip | belt-shaped film 11 is continuously pulled out from the original fabric roll 12, when the predetermined film site | part of the strip | belt-shaped film 11 in the middle of the extraction | drawer passes the 2nd film folding apparatus 50, As shown in FIG. 12, the folds 11 a are formed in the lateral direction of the traveling direction of the strip film 11.

  Furthermore, it moves as it is and passes through the first film folding device 40, so that a total of six folding folds (mountain folding folds 11b, valley folding folds 11c) are placed at predetermined positions along the film traveling direction. Is attached.

  In this way, the belt-like film 11 with the folding folds 11a, 11b, and 11c attached at predetermined positions is guided to the bag making machine 14, and is passed through the bag to be formed into a tubular film. At this time, the four mountain fold folds 11b are guided to the four corners of the bag making machine 14 to form a beautiful square cylinder. Then, the tubular film 25 as shown in FIG. 13 is formed by sealing the tubular film in the lateral direction and cutting it with the end seal device.

  And the beautiful gusset 33 is formed by pushing the part of the folding fold 11c into the center with the gusset nail | claw 31 of a gusset formation apparatus. Further, the crease 39 is attached along the one ear portion 25 a of the package 25 by the crease claw 36, 37. Furthermore, a fold 11a formed by the second film folding device 50 is formed on one of the ears 25a, 25b formed by end sealing.

  Therefore, it is neatly folded at the crease 11a and the crease 39, and the ear 25a side is neatly folded as shown in FIG. 14 to form the package 25 having a flat bottom surface 25d. Therefore, it can stand by its bottom surface 25d. In the figure, reference numeral 25e denotes a center seal portion heat-sealed by a center seal device.

DESCRIPTION OF SYMBOLS 11 Strip-shaped film 11a Folding fold 11b Folding fold 11b Folding fold 12c Roll roll 13 Tension roller 14 Bag making machine 15 Cylindrical film 16 Conveyor 21 Center seal apparatus 22 Film superposition end 24 End seal apparatus 24a Upper part End sealer 24b Lower end sealer 25 Package 25a, 25b Ear 25d Bottom 26 Supply conveyor 30 Gazette forming device 31 Gazette claw 33 Gazette 36 First crease claw 36a Lower end (tip)
36b Inclined surface 37 Second folding brazing claw 37a Upper end (tip)
37b Inclined surface 40 1st film folding apparatus 41 1st sheeting roller 42 2nd sheeting roller 43,44 Machine frame 50 2nd film folding apparatus 51 1st sheet folding roller 51a Rotating body 51b 1st folding Hook 52 Second Folding Roller 52a Rotating Body 52b Second Folding Hook

Claims (3)

It is a film folding apparatus that folds the belt-like film continuously supplied to the packaging machine body at a predetermined position along the traveling direction of the belt-like film,
A first brazing roller disposed oppositely across the strip film, and two second brazing rollers,
On the outer peripheral surfaces of the first brazing roller and the second brazing roller, a ridge is formed on one side along this, and a concave groove matching the ridge is formed on the other.
The two second brazing rollers are arranged forward and backward along the transport direction of the strip film, and the two second brazing rollers simultaneously contact the strip film and contact the first brazing roller and the the same film portion in the second shaping roller between the filmstrip second shaping rollers arranged before and after the contact sites also and pressurize the two by contact pressure, so as to press twice configured,
The film folding apparatus, wherein the first brazing roller is connected to a driving motor and is driven to rotate in response to a rotational output of the driving motor .   2. The film folding apparatus according to claim 1, comprising a plurality of sets of the first brazing roller and the two second brazing rollers. Means for forming a strip-shaped film into a cylindrical shape, a center seal device for sealing the polymerization end of the cylindrical film formed in the cylindrical shape, and disposed on the downstream side of the center seal device, In an automatic packaging machine equipped with an end seal device that performs sealing and cutting in the width direction,
The film folding apparatus according to claim 1 or 2 is provided on the upstream side of the cylindrical means.
The automatic wrapping machine, wherein the crease formed by the film folding apparatus is formed at least at a corner of the manufactured package.

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