JP5548879B2 - Film folding unit - Google Patents

Description

  The present invention relates to a film folding unit for adding a crease to a tubular film folded in a band shape.

  For example, a bottle used as a beverage container is covered with a label for the purpose of displaying and protecting the contents. Thermal shrinkage is widely used to bring the label into close contact with the bottle. The labels before heat shrinking are attached to the bottles one by one. In the label mounting system that performs this mounting operation, labels for mounting are sequentially created. These labels are generally produced by cutting a cylindrical film folded in a band shape at predetermined intervals. A film folding unit for adding a crease to this film has been proposed in order to smoothly open a label that has been folded before being attached to a bottle (see, for example, Patent Document 1).

  FIG. 15 shows an example of a conventional film folding unit. The film folding unit X shown in the figure includes an entry side guide roller 91, an entry side auxiliary roller 92, a film folding guide 93, a film folding roller 94, a nip roller 95, and an exit side from the upstream side in the transport direction T. A guide roller 96 is arranged. After passing through the entrance guide roller 91, the film F is conveyed to the film folding guide 93 along the conveyance direction T in a state where the pair of folds Fa is folded so as to be separated in the x direction.

  The film folding guide 93 has an entry side guide 93a and an exit side guide 93b. The entry side guide 93a is a very flat portion extending in the x direction, and the exit side guide 93b is a very flat portion extending in a direction perpendicular to both the transport direction T and the x direction. The film F advances to the exit side guide 93b after being opened by the entrance side guide 93a. As this progresses, the film F changes to a state in which the middle part of the pair of folds Fa is folded. Then, immediately after the exit side guide 93b, a new pair of folds Fb is formed by the film folding roller 94. Then, the film F is discharged to the subsequent downstream process through the nip roller 95 for preventing air leakage and the exit-side guide roller 96 for changing the direction, with the pair of creases Fb at both ends in the width direction.

  After the film folding unit X, the film F is conveyed to a label supply device that generates a plurality of labels by cutting the film F. In most cases, the film F is sandwiched between a plurality of pairs of rollers in this transport path. For example, after the film F is shipped from a film factory, the film F is always folded in a pair of folds Fa. For this reason, the pair of folds Fa are formed relatively firmly, and the shape tends to remain clearly even in the transport path. For this reason, when passing through the plurality of pairs of rollers, the portion of the pair of folds Fa may be locally bent, resulting in the form shown in FIG. Such a film F, sometimes referred to as Z-folding, is not preferable because a label with an unintended local crease is generated.

  Further, the pair of folds Fa is formed at a relatively accurate position with respect to the pattern of printing applied to the film F. On the other hand, the position of the pair of folds Fb formed by the film folding operation when passing through the film folding guide 93 is likely to be shifted from the position of the printed pattern compared to the pair of folds Fa. For example, the label L is generated by cutting the film F. As shown in FIG. 17, when the label L is mounted on the bottle B having a substantially square cross section, the pair of creases Lb and the bottle B which are the pair of folds Fb which are both ends in the width direction at the time of conveyance are used. By matching a pair of corners located diagonally to each other. For this reason, when the pair of folds Fa is in a substantially normal position and the pair of folds Fb is shifted, the pair of folds La that is the pair of folds Fa is shifted with respect to the bottle B. It will be. This means that the printing pattern is shifted with respect to the bottle B, and there is a problem that the bottle B has to be handled as a defective product.

JP 2006-76635 A

  The present invention has been conceived under the circumstances described above, and prevents the film from being unintentionally broken locally, and the printed pattern of the label deviates from the bottle. It is an object of the present invention to provide a film folding unit that can suppress this.

  The film folding unit provided by the present invention is different from the pair of first folds with respect to the cylindrical film folded in a band shape so that the pair of first folds are at both ends in the width direction. A film folding unit that forms a pair of second folds at a position, and an entrance guide that opens the film transported with the first direction perpendicular to the film transport direction as a width direction; A pair of second folds that are located downstream of the entry-side guide and that are perpendicular to the transport direction and spaced apart in a second direction that is different from the first direction. A folding guide formed on the film, and a state of being folded at the pair of first folds positioned on the downstream side with respect to the folding guide and spaced apart in the first direction It is characterized in that and a delivery side guide to discharge the film.

  In preferable embodiment of this invention, the film folding guide made into the integral structure which has the said entrance guide, the said folding guide, and the said exit guide is provided.

  In a preferred embodiment of the present invention, the folding guide is formed with a pair of notches positioned at both ends in the second direction, and the film is sandwiched between the pair of notches 1 A pair of film folding rollers is further provided.

  According to such a configuration, when the film is sandwiched, for example, by a roller in the subsequent transport path, the pair of second folds are sandwiched in a state of being positioned at the center in the width direction. The pair of second folds is not so strong as compared to the pair of first folds. Therefore, it is possible to prevent the film from being in a so-called Z-fold form, and it is possible to avoid unintended local creases on the label generated from the film. .

  In addition, when the label is attached to the bottle, the pair of first folds can be used as a reference for positioning the bottle. That is, even if the position in the width direction of the pair of second folds slightly shifts unintentionally in the film fold in the film fold unit, the pair of second folds of the label is the same. The portion that has been displaced with respect to the bottle is not displaced, and the portion that was the pair of first folds is hardly displaced. The pair of first folds is relatively accurately aligned with the printed pattern applied to the film label. Therefore, even if the position of the pair of second folds is slightly shifted, the printed pattern of the label can be accurately positioned with respect to the bottle.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a schematic plan view which shows the label mounting system provided with an example of the film folding unit which concerns on this invention. It is a front view which shows an example of the film folding unit which concerns on this invention. It is a side view which shows an example of the film folding unit which concerns on this invention. It is a perspective view which shows the film folding guide of an example of the film folding unit which concerns on this invention. It is a perspective view which shows the state which a film passes the film folding guide of an example of the film folding unit which concerns on this invention. It is a front view which shows the film folding guide of an example of the film folding unit which concerns on this invention. It is a side view which shows the film folding guide of an example of the film folding unit which concerns on this invention. It is sectional drawing which follows the VIII-VIII line of FIG. It is sectional drawing which follows the IX-IX line of FIG. It is a schematic front view which shows the label supply apparatus of the label mounting system shown in FIG. It is a side view which shows delivery of the label from a label supply apparatus to a take-up part. It is a front view which shows the label mounting unit of the label mounting system shown in FIG. It is a principal part top view which shows the film opener of the label mounting unit shown in FIG. It is sectional drawing which shows the state with which the label was mounted | worn with the bottle. It is a front view which shows an example of the conventional film folding unit. It is a principal part perspective view which shows the film in which the crease | fold was formed by the film folding unit shown in FIG. It is sectional drawing which shows the state which mounted | wore the bottle with the label produced | generated from the film in which the crease | fold was formed by the film folding unit shown in FIG.

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

  FIG. 1 shows a label mounting system in which an example of a film folding unit according to the present invention is used. The label mounting system A of the present embodiment includes a bottle supply device 1, a label mounting device 2, a film supply device 3, a label supply device 4, a label delivery device 5, and a bottle transport device 6. The label mounting system A is configured to sequentially mount labels on a plurality of bottles used as, for example, beverage containers.

  The bottle supply device 1 includes a belt conveyor 11, a screw conveyor 12, and a star wheel 13, and sequentially supplies a plurality of bottles B to the label mounting device 2. The belt conveyor 11 introduces a plurality of bottles B from the left side in the figure. The plurality of bottles B transferred from the belt conveyor 11 to the screw conveyor 12 are guided to the star wheel 13 at a predetermined interval. The plurality of bottles B delivered to the star wheel 13 are delivered to the label mounting apparatus 2 at the delivery position K1 after moving about a half circumference on the circular track.

  The film supply device 3 includes a film feeding unit 39 and a film folding unit 30, and supplies the film F to the label supply device 4. The film feeding unit 39 holds the film F in a state of being wound on a reel, for example. The film F fed out from the reel is sent to the film folding unit 30.

  The film F is sent to the film folding unit 30 in a state of being folded in a band shape so that the pair of folds Fa are at both ends in the width direction. The film folding unit 30 is for forming another pair of folds Fb on the film F. As shown in FIGS. 2 and 3, a film folding guide 31, an entrance guide roller 391, and a plurality of pairs. Entry side auxiliary roller 392, a pair of entry side support rollers 393, a pair of film folding rollers 394, a pair of exit side support rollers 395, a pair of nip rollers 396, and an exit side guide roller 397. .

  The film F sent from the film feeding unit 39 in the horizontal direction is sent upward in the vertical direction through the entrance guide roller 391. For this reason, in the film folding unit 30, the conveyance direction T is directed upward in the vertical direction. The plurality of pairs of entrance-side auxiliary rollers 392 are spaced apart from each other in the transport direction T. In the present embodiment, the axial direction of the entry-side guide roller 391 is along the y direction, whereas the axial direction of the plural pairs of entry-side auxiliary rollers 392 is along the x direction. For this reason, the film F is fed while being twisted by 90 degrees in a section between the entry-side guide roller 391 and the pair of entry-side auxiliary rollers 392 located at the lowermost position.

  The film F sent out from the entrance auxiliary roller 392 located at the uppermost position passes through the film folding guide 31. As shown in FIGS. 4 to 9, the film folding guide 31 includes an entrance guide plate 32, a central guide plate 33, an exit guide plate 34, direction changing blocks 35 and 36, and support roller units 37 and 38. Yes. The film folding guide 31 of the present embodiment has a substantially symmetric shape in the vertical direction (conveyance direction T).

  The entry side guide plate 32 has a substantially trapezoidal shape with an opening and is supported by the direction changing block 35. A portion corresponding to the vicinity of the bottom of the trapezoidal shape of the entry side guide plate 32 is exposed vertically downward (upward in the transport direction T) from the direction changing block 35. This exposed portion is an entrance guide 321. The entry-side guide 321 has a flat plate shape along the x direction and has a pair of end portions 321a that are separated in the x direction. The film F sent to the film folding guide 31 is sequentially opened in a state where the pair of folds Fa coincides with the pair of end portions 321a.

  The direction change block 35 is made of resin, for example, and has a pair of guide surfaces 351 and 352. The pair of guide surfaces 351 are substantially isosceles triangles whose bottom is the lower side in the vertical direction (upstream side in the transport direction T), and the bottom is along the x direction. The pair of guide surfaces 352 are substantially isosceles triangles whose base is the upper side in the vertical direction (downstream side in the transport direction T), and the base is along the y direction. As the film F that has advanced from the bottom of the guide surface 351 advances so as to contact the pair of guide surfaces 351 and 352, the pair of folds Fa separated in the x direction gradually approach each other. . That is, the film F is converted into a flat shape in the y direction.

  A support roller unit 37 is attached to the direction changing block 35. The support roller unit 37 includes a case 371 and a pair of support rollers 372. The case 371 supports the pair of support rollers 372 and is attached to the entry side guide plate 32. As clearly shown in FIG. 9, the pair of support rollers 372 has the x direction as an axial direction and is arranged in parallel to the y direction. An entry-side support roller 393 is disposed at a position substantially in contact with each support roller 372. The support roller 372 and the entry-side support roller 393 advance the film F along the direction change block 35 without being unfairly lifted or twisted.

  As shown in FIGS. 4 to 9, a central guide plate 33 is attached to the upper side in the vertical direction (downstream in the transport direction T) of the direction changing block 35. The central guide plate 33 is supported by both the direction changing blocks 35 and 36 and has a substantially hexagonal shape. A portion of the central guide plate 33 exposed from the direction changing blocks 35 and 36 is a folding guide 331. The folding guide 331 has a flat plate shape along the y direction, and a pair of cutout portions 331a are formed at both ends in the y direction.

  As shown in FIGS. 6 to 9, a pair of film folding rollers 394 are arranged with the folding guide 331 interposed therebetween. Each film folding roller 394 has an axial direction along the y direction and is divided into two in the y direction. The divided portions of the pair of film folding rollers 394 that are on the same side in the y direction are arranged so as to be substantially in contact with each other at the notch portion 331a of the folding guide 331.

  The film F whose shape has been changed by the direction changing block 35 is guided to the folding guide 331 in a state of being flat in the y direction. A pair of fold lines Fb are formed at both ends of the film F in the y direction by the pair of film folding rollers 394.

  The film F in which the pair of fold lines Fb is formed is guided to the direction change block 36. The direction change block 36 is made of resin, for example, and has a pair of guide surfaces 361 and 362. The pair of guide surfaces 361 are substantially isosceles triangles whose base is the upper side in the vertical direction (downstream in the transport direction T), and the bases are along the x direction. The pair of guide surfaces 362 are substantially isosceles triangles whose bottom is the lower side in the vertical direction (upstream side in the transport direction T), and the bottom is along the y direction. As the film F that has advanced from the bottom of the guide surface 362 advances so as to contact the pair of guide surfaces 361 and 362, the pair of creases Fb that are separated in the y direction gradually approach each other. The pair of folds Fa is again separated in the x direction. That is, the film F is returned to a flat shape in the x direction.

  A support roller unit 38 is attached to the direction changing block 36. The support roller unit 38 includes a case 381 and a pair of support rollers 382. The case 381 supports the pair of support rollers 382 and is attached to the outlet guide plate 34. As clearly shown in FIG. 9, the pair of support rollers 382 are arranged in parallel with the y direction with the x direction as the axial direction. An output side support roller 395 is disposed at a position substantially in contact with each support roller 382. The support roller 382 and the exit support roller 395 advance the film F along the direction change block 36 without being unduly lifted or twisted.

  As shown in FIGS. 4 to 9, an exit side guide plate 34 is attached to the upper side in the vertical direction (downstream in the transport direction T) of the direction changing block 36. The exit guide plate 34 has a substantially trapezoidal shape with an opening. A portion of the exit-side guide plate 34 corresponding to the vicinity of the bottom of the trapezoid is exposed from the direction change block 36 in the vertical direction (downward in the transport direction T). The exposed portion is an exit guide 341. The exit side guide 341 has a flat plate shape along the x direction, and has a pair of end portions 341 a that are separated in the x direction. The film F sent to the exit guide 341 is sequentially discharged in a state where the pair of folds Fa coincides with the pair of end portions 341a.

  The film F discharged from the film folding guide 31 is folded in a band shape so that a pair of folds Fa are located at both ends in the width direction. Each fold line Fb is located at the center of the film F in the width direction.

  A pair of nip rollers 396 is disposed above the film folding guide 31 in the vertical direction (downstream in the transport direction T). The pair of nip rollers 396 are pressed against each other with a relatively strong pressure. This is to prevent the air staying in the film F from leaking from the vicinity of the film folding guide 31 upward in the vertical direction (downstream in the transport direction T) via the pair of folds Fb. If the air disappears from the vicinity of the film folding guide 31, the film F sticks to the film folding guide 31 and the conveyance of the film F is hindered.

  An exit-side guide roller 397 is disposed above the pair of nip rollers 396 in the vertical direction (on the downstream side in the transport direction T). By passing through the delivery guide roller 397, the film F is sent to the label supply device 4 as shown in FIG.

  The label supply device 4 generates a plurality of labels L by cutting the film F sent from the film supply device 3, and supplies these to the label delivery device 5. The label supply device 4 is configured, for example, as shown in FIG. 10, and includes a drive roller 41, a cutting unit 42, an upstream conveyance unit 43, a suction auxiliary unit 44, a downstream conveyance unit 45, and a label detection sensor 46. Yes.

  The film F is sent to the cutting unit 42 via the driving roller 41. The cutting unit 42 includes a fixed blade 42a and a rotary blade 42b. The rotary blade 42b is rotationally driven and controlled by, for example, a servo motor in synchronization with the film F feeding operation. The film F is cut by the rotation of the rotary blade 42b. By performing this cutting continuously, a plurality of labels L are sequentially generated.

  The upstream conveyance unit 43 includes a drive pulley 43a and a plurality of guide pulleys 43b, a belt 43c wound around these, and a suction chamber 43d. As shown in FIG. 11, the belt 43c has a plurality of through holes. As shown in FIGS. 10 and 11, a suction chamber 43d is provided along the portion of the belt 43c that extends in the vertical direction. The suction force generated by the suction chamber 43d acts on the label L through the plurality of through holes of the belt 43c. Thereby, the plurality of labels L are sequentially sent while sticking to the belt 43c.

  The suction auxiliary unit 44 includes a drive pulley 44a, a plurality of guide pulleys 44b, and a belt 44c wound around these. The suction auxiliary unit 44 is disposed so as to face the upstream transport unit 43 across the transport path of the label L. By pressing the label L adsorbed on the belt 43c against the belt 43c, the label L is smoother. Contributes to the transportation of

  The downstream transport unit 45 includes a driving pulley 45a and a plurality of guide pulleys 45b, a belt 45c wound around these pulleys, and a suction chamber 45d. As shown in FIG. 11, the belt 45c has a plurality of through holes. The suction force of the suction chamber 45d acts on the label L through these through holes. Thereby, the label L sent from the upstream transport unit 43 is held by the belt 45c.

  The label detection sensor 46 detects, for example, the upper end position of the label L held by the downstream transport unit 45. The label L whose upper end is detected by the label detection sensor 46 means that it is located at the delivery position K5 in FIG.

  As shown in FIG. 1, the label L supplied from the label supply device 4 is delivered to the label mounting device 2 via the label delivery device 5. The label delivery device 5 includes a rotation shaft 52 and a plurality of take-up portions 51 arranged around the rotation shaft 52. Each take-up unit 51 can hold one label L. As shown in FIG. 11, each take-up unit 51 has a pair of suction rods 51a. The pair of suction rods 51a are rod-like members arranged in parallel to each other, and each provided with a plurality of holes for suction. The distance between the pair of suction rods 51a is slightly larger than the width of the belt 45c and the suction chamber 45d of the downstream transport unit 45. As a result, as shown in FIG. 10, the take-up unit 51 receives the label L held at a predetermined position (corresponding to the delivery position K5 in FIG. 1) of the downstream transport unit 45.

  As shown in FIG. 1, the label L carried to the delivery position K <b> 2 by the label delivery device 5 is delivered to the label mounting device 2. The label mounting device 2 has a plurality of label mounting units 20 arranged concentrically and rotatably.

  As shown in FIG. 12, the label mounting unit 20 includes, for example, a film opener 21 and a mandrel 22. The film opener 21 is for opening the label L received from the take-up unit 51 in a cylindrical shape. FIG. 13 shows an example of the film opener 21. The film opener 21 includes a pair of arms 21a and opening / closing means 21b for opening and closing these arms 21a. A suction hole is formed at the tip of the pair of arms 21a.

  As shown in FIGS. 12 (a) and 13 (a), the label L delivered from the take-up portion 51 is sandwiched between a pair of arms 21a. At this time, the pair of arms 21 a sucks the vicinity of the pair of folds Lb in the label L. A mandrel 22 having a plurality of opening / closing rods 23 is disposed above the film opener 21. At this time, the plurality of opening / closing rods 23 are in a closed state with their tips close to each other. Next, as shown in FIGS. 12B and 13B, when the pair of arms 21a is opened by the opening / closing means 21b, the label L is opened in a cylindrical shape. Subsequently, when the mandrel 22 is lowered, the plurality of opening / closing rods 23 are inserted into the label L. And the label L is hold | maintained by the some opening / closing rod 23 from the inner side by making the some opening / closing rod 23 into an open state. And as shown in FIG.12 (c), when the mandrel 22 further descend | falls, the label L is mounted | worn with the bottle B arrange | positioned below. This mounting operation is performed at the mounting position K3 shown in FIG.

  FIG. 14 shows the bottle B to which the label L is attached. In the present embodiment, the bottle B has a substantially square cross section. The label L has a pair of folds La and a pair of folds Lb. The pair of folds La is a portion that was a pair of folds Fa, and the pair of folds Lb is a portion that was a pair of folds Fb. A pair of folds La and a pair of folds Lb are located at the four corners of the bottle B. In particular, when the label L is attached to the bottle B, the alignment between the pair of creases La and the corners of the bottle B that are located at both ends in the width direction of the label L until immediately before being opened by the film opener 21 is relatively accurate. To be made.

  The bottle B on which the label L is mounted by the label mounting apparatus 2 is delivered to the bottle transport apparatus 6 at the delivery position K4 shown in FIG. The bottle conveyance device 6 includes a star wheel 61 and a belt conveyor 62, for example. The star wheel 61 conveys the plurality of bottles B received from the label mounting device 2 on a circular track at a predetermined interval. The belt conveyor 62 conveys the plurality of bottles B to, for example, a label shrinking device (not shown) provided with a heater that heat-shrinks the label L. Thus, the attachment of the label L to the bottle B is completed.

  Next, the operation of the label mounting system including the film folding unit 30 will be described.

  According to this embodiment, after the pair of folds Fb is formed by the film folding unit 30, the pair of folds Fa is folded again so as to be at both ends in the width direction. For this reason, when sandwiched between rollers (not shown) in the subsequent transport path, the pair of folds Fb are sandwiched in a state of being positioned at the center in the width direction. The pair of folds Fb is not so strong as compared to the pair of folds Fa. Therefore, it is possible to suppress the film F from being in a form called a so-called Z-fold as shown in FIG. 16, and to avoid unintended local creases on the label L. it can.

  Further, as shown in FIG. 14, when the label L is attached to the bottle B, a pair of fold lines La can be used as a reference for positioning the bottle B. That is, even if the position in the width direction of the pair of folds Fb is slightly shifted unintentionally in the film folding in the film folding unit 30, the pair of folds Lb is only shifted from the bottle B by that amount. The pair of fold lines La is hardly displaced. The pair of folds La is relatively accurately aligned with the printed pattern applied to the label L. Therefore, even if the position of the pair of folds Fb is slightly shifted, the printing pattern of the label L with respect to the bottle B can be accurately positioned.

  In the film folding guide 31, an entrance guide 321 and an exit guide 341 extending along the x direction, and a folding guide 331 extending along the y direction located therebetween are arranged in series along the transport direction T. It has been configured. Thereby, after forming the pair of folds Fb on the film F folded by the pair of folds Fa, the operation of returning to the state folded by the pair of folds Fa can be performed smoothly.

  A pair of notch portions 331a is provided at both ends of the folding guide 331, and a pair of film folding rollers 394 each having a portion divided in the y direction is used to form a pair of fold lines Fb. The film folding guide 31 can be integrated from the entry side to the exit side. Thereby, it is possible to eliminate the alignment work between the entry side guide 321, the folding guide 331, and the exit side guide 341, and the work efficiency can be improved.

  The film folding unit according to the present invention is not limited to the above-described embodiment. The specific configuration of each part of the film folding unit according to the present invention can be varied in design in various ways.

  The entry side guide 321, the folding guide 331, and the exit side guide 341 are preferably constituted by a part of the film folding guide 31 having an integral structure, but the present invention is not limited to this, and the entry side guide 321. The folding guide 331 and the exit guide 341 may be configured by separate parts, respectively.

A label mounting system B bottle F film Fa (first) fold Fb (second) fold L label La, Lb crease T transport direction x (first) direction y (second) direction 1 bottle supply device 11 Belt conveyor 12 Screw conveyor 13 Star wheel 2 Label mounting device 20 Label mounting unit 21 Film opener 22 Mandrel 23 Opening / closing rod 3 Film supply device 30 Film folding guide 31 Film folding guide 32 Entrance guide plate 321 Entrance guide 321a End 33 Center Guide plate 331 Folding guide 331a Notch 34 Exit side guide plate 341 Exit side guide 341a End 35 Direction change block 351 Guide surface 352 Guide surface 36 Direction change block 361 Guide surface 362 Guide surface 37 La unit 371 Case 372 Support roller 38 Support roller unit 381 Case 382 Support roller 39 Film feeding unit 391 Entrance side guide roller 392 Entrance side auxiliary roller 393 Entrance side support roller 394 Film folding roller 395 Exit side support roller 396 Nip roller 397 Exit side guide Roller 4 Label supply device 41 Driving roller 42 Cutting unit 43 Upstream transport unit 44 Suction auxiliary unit 45 Downstream transport unit 46 Label detection sensor 5 Label delivery device 51 Take-up unit 6 Bottle transport device 61 Star wheel 62 Belt conveyor

Claims (2)

A pair of second folds is formed at a position different from the pair of first folds with respect to the tubular film folded in a band shape so that the pair of first folds is at both ends in the width direction. A film folding unit,
An entry-side guide that opens the film that is conveyed with the first direction perpendicular to the conveying direction of the film as the width direction;
A pair of second folds that are located downstream of the entry-side guide and that are perpendicular to the transport direction and spaced apart in a second direction that is different from the first direction. A folding guide formed on the film;
An exit side guide for discharging the film in a state of being folded at the pair of first folds that are located downstream from the folding guide and separated in the first direction ;
A film folding unit comprising: a film folding guide having an integrated structure having the entry side guide, the folding guide, and the exit side guide . The folding guide is formed with a pair of notches located at both ends in the second direction,
In notches of said pair further comprising a film folding roller pair pinching the film, a film folding unit according to claim 1.

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