WO2002098737A1

WO2002098737A1 - Bag-making and packaging machine

Info

Publication number: WO2002098737A1
Application number: PCT/JP2002/005463
Authority: WO
Inventors: Hideshi Miyamoto; Kazuya Sugimura; Makoto Ichikawa
Original assignee: Ishida Co., Ltd.
Priority date: 2001-06-05
Filing date: 2002-06-03
Publication date: 2002-12-12
Also published as: DE60225799D1; DE60225799T2; EP1394048B1; JPWO2002098737A1; JP4320248B2; EP1394048A1; US20060117713A1; US20040065047A1; EP1394048A4

Abstract

A bag-making and packaging machine, wherein, at the time of replacement of a film roll, the film of the film roll before the replacement is fixed by a film retaining mechanism and sucked by a film sucking mechanism, and the end of the film is pulled to the film sucking mechanism by a film storage mechanism, the end of the film sucked by the film sucking mechanism is connected to the tip of the film of the film roll after the replacement with a pressure-sensitive tape and, when the film is detected to be pulled out to the end based on the output value of a load cell, a controller stops a commodity supply part and a motor, whereby a commodity already supplied from the commodity supply part to a bag-making and packaging part when the commodity supply part is stopped is packaged by using the film stored in the film storage mechanism, and then the controller stops the operation of the bag-making and packaging part.

Description

Specification

Bag making and packaging machine

The present invention relates to a bag making and packaging machine provided with a film collecting device. Background art

2. Description of the Related Art Conventionally, in a bag making and packaging machine that fills and packs goods while manufacturing bags, a film roll in which a long film is wound around a roll core is used as a bag packaging material. The film is pulled out by rotating the support shaft that supports the film roll by the motor, and is conveyed to the bag making and packaging unit. When the film wound around the roll core of the film roll is pulled out to the end, the film is cut using a blade or the like at the film joint provided at a predetermined distance from the film roll, and the used film is used. Replace the film roll with a new film slot. At this time, the film is pulled out from the new film roll by a predetermined length, and the end of the cut film remaining at the film joining portion and the film leading end of the new film roll are joined using an adhesive tape, or The end of the film is heat-sealed to the leading edge of the new film roll.

In this way, the film end left at the film joining portion and the film drawn from the new film opening are joined and transported to the bag making and packaging unit.

However, because the distance between the film joint and the mounting position of the film roll is large, if the film is cut at the film joint, the film located between the roll core and the film joint cannot be used. It was discarded as unnecessary.

The length of the discarded film varies depending on the bag size, but it usually corresponds to a length of three to five bags, and the cumulative loss is a great loss. In addition, because they are disposed of as unnecessary, they may cause an increase in waste.

In addition, when the film wound on the film roll is consumed to the end, the operation of the bag making and packaging machine must be stopped. Even if it stops, the already released goods will reach the bag making and packaging section with a time lag, so even if you try to pack the goods at that time, the bag making and packaging machine is already stopped It was not possible to package the used products, and in the end, such products were wasted. Disclosure of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide a bag making and packaging machine which can use up a film wound on a film roll to the end without waste, and which can easily replace the film roll and join the film.

Another object of the present invention is to provide a bag making and packaging machine that can reliably package products already released from the product supply unit even when the film cannot be unwound from the film mouth. .

A bag making and packaging machine according to one aspect of the present invention is a bag making and packaging machine for packaging products while making a bag using a film opening in which a long film is wound in a roll shape. A film roll support unit that supports the film, a film transport mechanism that transports the film sent out from the film slot, and a film roll exchange unit that is provided between the film edge support unit and the film transport mechanism. A film joining device that joins the end of the film on the side of the film transport mechanism and the leading end of the film of the replaced film roll, and the film joining device traverses the film upstream from the film joining position. It is equipped with a film storage mechanism for drawing.

In the bag making and packaging machine according to the present invention, the film sent from the film roll is transported by the film transport mechanism. When replacing the film roll, the film sent from the film roll before replacement is cut in the vicinity of the film roll, and the end of the cut film is moved toward the film storage mechanism, so that the cut film is removed. The end can be guided to the film joining device. This makes it possible to join the end of the film on the film transport mechanism side and the leading end of the film of the replaced film roll in the film joining apparatus.

Therefore, the film of the film roll before the replacement can be used up to the root of the roll core, and the film can be completely used up. Also, unnecessary items Since there is no film to be disposed of as waste, it is possible to reduce waste. As a result, the cost of bag making and packaging can be reduced.

The film storage mechanism includes a fixed roller that guides the conveyed film, a movable roller that changes the traveling distance of the conveyed film, and a moving mechanism that moves the movable roller toward and away from the fixed roller. be able to.

Thus, when the film roll is replaced, the cut end of the film can be moved to the film storage mechanism by moving the movable roller relative to the fixed roller by the moving mechanism.

Further, a plurality of sets of fixed rollers and movable rollers may be provided alternately. As a result, the film storage mechanism can be made compact, and the installation space is reduced.

Furthermore, when the film is joined, the fixed rollers and the movable opening contact alternately with one side and the other side of the film, so that when the operation is resumed after replacing the film roll, the change in film tension is minimized. It is possible to prevent the film from loosening and meandering. As a result, defects during bag production can be prevented.

The moving mechanism includes a fixed frame that supports both ends of the fixed roller, a movable frame that supports both ends of the movable roller, and a movable roller that is arranged parallel to the fixed roller and one end of the movable roller can rotate with respect to the fixed frame. The movable roller can be relatively moved with respect to the fixed porter by rotating the movable frame with respect to the fixed frame about the rotation axis.

Furthermore, when replacing the film roll, the movable frame is swung about the rotation axis with respect to the fixed frame, and the movable roller is moved relative to the fixed roller, so that the cut end of the film is stored in the film. You can get close to the mechanism. In this way, a film storage mechanism can be realized with a simple configuration.

In particular, when a plurality of sets of a movable roller and a fixed roller are provided, the movable frame is pivoted about the rotation axis with respect to the fixed frame, so that the movable roller located on the downstream side with respect to the film transport direction is provided. Movable roller located on the upstream side by the amount of movement Can be larger than the moving amount of As a result, the resistance of the transport of the film to the downstream side decreases, and the resistance of the reverse transport increases.

The film bonding apparatus further includes a film suction holding mechanism that is disposed upstream of the film storage mechanism in the film transport direction and that suctions and holds the film separated from the film roll before replacement during film bonding.

This allows the film on the downstream side to be stored by the film storage mechanism while holding the end of the film by suction.

At this time, the cut end of the film is guided to the film joining apparatus, and can be easily joined to the leading end of the film roll after replacement without loosening the end of the film. As a result, fluctuations in the tension of the film after the film bonding can be reduced.

The film bonding apparatus further includes a film fixing and holding mechanism for fixing and holding the film on the film transport mechanism side at the time of film bonding on the downstream side of the film storage mechanism.

As described above, according to the present invention, the film sent from the film port is transported by the film transport mechanism. When replacing the film roll, the film on the film transport mechanism side is cut near the film roll, and the cut film is stored in the film storage mechanism so that the end of the cut film is transferred to the film joining device. Can be guided. This makes it possible to join the terminal end of the film on the side of the film transport mechanism and the leading end of the film in the film opening after replacement in the film joining device.

Therefore, the film of the film roll can be used up to the end, and the loss of the film can be eliminated. In addition, since there is no film to be disposed of as unnecessary, waste can be reduced. As a result, the cost of bag making and packaging can be reduced.

A bag-making and packaging machine according to another aspect of the present invention is a bag-making and packaging machine that packs a product while making a bag using a film roll in which a long film is wound in a roll shape. A bag-making and packaging section for packing the product, a product supply section for supplying the products to the bag-making and packaging section, a film roll support section for supporting a film roll, and a film port support section. A driving device that feeds the film from the held film slot, a film transport mechanism that transports the film that is transported from the film roll to the bag making and packaging unit, and a film that stores and transports the film transported by the film transport mechanism A storage mechanism, a detector for detecting that the film of the film roll has been consumed to the end, and a product stored in the film storage mechanism in which the operation of the product supply unit and the driving device is stopped in response to the output of the detector. And a control unit for stopping the operation of the bag making and packaging unit after a predetermined number of bags have been sent out.

In the bag making and packaging machine of the present invention, the film is sent out from the film roll and is conveyed to the bag making and packaging unit by the film conveying mechanism. At this time, a part of the conveyed film is sent out while being stored by the film storage mechanism. In addition, every time a product is supplied from the product supply unit to the bag making and packaging unit, the product is wrapped in the bag making and packaging unit.When the film of the film roll is consumed to the end, the detector detects this. In response, the control unit stops the operation of the product supply unit and the driving device.

However, at that time, some products being transported exist between the product supply unit and the bag making and packaging unit, so the bag making and packaging unit consumes the film stored in the film storage mechanism. Packaging products that are being transported. As a result, even if the film cannot be sent out from the film roll, the merchandise being conveyed is packed by the bag making and packaging unit. Then, packaging of these commodities can be performed, and after completing the packaging, the control unit stops the operation of the bag making and packaging unit.

In this way, the products already supplied from the product supply unit to the bag making and packaging unit when the product supply unit is stopped can be packaged using the film stored in the film storage mechanism.

The detector may include a tension detector that detects a tension of the film, and the control unit may be configured to stop the operation of the product supply unit and the driving device when the output of the tension detector exceeds a predetermined value. .

Thus, when the film of the film roll is consumed up to the end, the tension of the film certainly exceeds the predetermined value, so that the operation of the product supply unit and the driving device can be stopped. The control unit controls the driving device so that the tension of the film becomes constant when the output of the tension detector is equal to or less than a predetermined value.

Thus, during normal operation, the film tension is kept constant based on the output of the tension detector.

It is preferable that the length of the film stored in the film storage unit is the length of the film for wrapping the product already supplied from the product supply unit to the bag making and packaging unit when the operation of the product supply unit is stopped.

Thus, when the operation of the product supply unit is stopped, the products already supplied from the product supply unit to the bag making and packaging unit can be reliably packed.

The film storage mechanism includes a fixed roller that guides the conveyed film, a movable roller that changes the traveling distance of the conveyed film, and a moving mechanism that moves the movable port closer to and away from the fixed roller. It can be configured.

As a result, the movable roller moves relative to the fixed roller according to the film tension, so that the film tension is adjusted and the film is stored in an appropriate amount at the same time, and the film is sent out to the bag making and packaging unit. Can be.

Further, when the product supply unit is stopped, the movable roller moves relative to the fixed roller by the moving mechanism, and the film stored in the film storage mechanism can be sent out to the bag making and packaging unit. Also, when changing the film roll, the cut end of the film can be approached to the film storage mechanism and stored in the film storage part that has no room. In this manner, the film storage mechanism can realize the supply of the film after the supply of the product is stopped and the storage of the film in the film storage unit when the film is changed.

The bag making and packaging machine joins the end of the film on the side of the film transport mechanism and the front end of the film in the replaced film between the film roll supporting portion and the film transport mechanism when the film reel is replaced. A film joining device can be further provided. The film storage mechanism can be provided downstream of the film joining position of the film joining apparatus.

In this case, when replacing the film roll, the film sent from the film roll is cut near the film roll, and the cut film is stored in the film storage. By approaching the retaining mechanism, the cut end of the film can be guided to the film joining device. This makes it possible to join the end of the film on the film transport mechanism side and the leading end of the film of the replaced film roll in the film joining apparatus.

In addition, products already supplied from the product supply unit to the bag making and packaging unit when the product supply unit is stopped can be wrapped using the film of the film storage mechanism provided in the film bonding apparatus.

The film storage mechanism includes a fixed roller for guiding the conveyed film, a movable roller for changing the traveling distance of the conveyed film, and a moving mechanism for moving the movable port closer to and away from the fixed port. It can be configured to include.

As a result, the movable roller moves relative to the fixed roller in accordance with the film tension, so that the film can be sent out to the bag making and packaging section while simultaneously adjusting the film tension and storing an appropriate amount of the film. Can be.

Further, when the product supply unit is stopped, the movable roller moves relative to the fixed roller by the moving mechanism, and the film stored in the film storage mechanism can be sent out to the bag making and packaging unit. Furthermore, when exchanging the film roll, the cut end of the film can be moved to the film storage mechanism. In this way, in the film storage mechanism, it is possible to realize the feeding of the film after the supply of the product is stopped and the storage of the film when the film roll is replaced.

The movable frame includes at least one movable roller, the fixed frame includes at least one fixed roller, and the movable roller and the fixed roller may be arranged alternately along the film transport direction. .

Thus, when the product supply unit is stopped, the movable roller moves relative to the fixed roller by the moving mechanism, so that the film stored in the film storage mechanism can be sent out to the bag making and packaging unit. Also, when changing the film roll, The end of the film can be moved to the film storage mechanism. In this way, film sending and storage can be realized by the film storage mechanism.

The moving mechanism includes a fixed frame that supports both ends of the fixed roller, a movable frame that supports both ends of the movable roller, and a movable frame that is arranged in parallel with the fixed roller and rotatably supports one end of the movable frame with respect to the fixed frame. A rotating shaft, with the movable frame swinging about the rotating shaft with respect to the fixed frame, whereby the movable roller can be moved relatively to the fixed roller.

Thus, when the product supply unit is stopped, the movable frame approaches and separates from the fixed frame about the rotation axis, so that the film stored in the film storage mechanism can be sent to the bag making and packaging unit. In addition, when changing the film roll, the movable frame swings about the rotating shaft with respect to the fixed frame, so that the end of the cut film can be approached to the film storage mechanism. The apparatus may further include a film suction holding mechanism that suctions and holds an end of the cut film at an upstream side of the film storage mechanism in the film transport direction.

In this case, the cut film can be stored in the film storage mechanism while the film end is sucked and held by the film suction and hold mechanism provided upstream of the film storage mechanism in the film transport direction.

As a result, the film end can be guided to the film bonding apparatus while maintaining the appearance of the cut film, and the film end of the film roll after replacement can be easily attached without loosening the film end. Joining becomes possible.

The control unit can operate the film suction holding mechanism during the film joining operation. This makes it possible to reliably prevent the film from shifting during film joining.

The film bonding apparatus may further include a film fixing and holding mechanism that is disposed upstream of the film storage mechanism in the film transport direction and that fixes and holds the cut end of the film during film bonding. Thus, the film stored in the film storage mechanism can be supplied to the bag making and packaging unit without applying a tensile load to the film roll. As a result, it is possible to prevent the film from being damaged due to a tensile load applied to the film opening.

The control unit may operate the film fixing and holding mechanism in response to the output of the detector. As a result, it is possible to reliably prevent the film from being damaged due to a tensile load being applied to the film roll.

As described above, according to the present invention, products already supplied from the product supply unit to the bag making and packaging unit when the product supply unit is stopped can be wrapped using the film stored in the film storage mechanism. Therefore, there is no waste of goods. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic side view showing a configuration of a bag making and packaging machine according to one embodiment of the present invention.

FIG. 2 is a schematic rear view showing the configuration of the bag making and packaging machine of FIG. 1 when viewed from the side of the film opening.

FIG. 3 is a schematic plan view showing the configuration of the bag making and packaging machine shown in FIG. 1 when viewed from above, and FIG. 4 is a schematic perspective view schematically showing a film transport path in FIG. FIG. 5 is a perspective view showing the configuration of the bag making and packaging unit in FIG.

FIG. 6 is a schematic side view showing a detailed configuration of a film roll section in the bag making and packaging machine of FIG.

FIG. 7 is a schematic cross-sectional view showing a first step when replacing a film roll. FIG. 8 is a schematic cross-sectional view showing a second step when replacing the film roll. FIG. 9 is a schematic cross-sectional view showing a third step when replacing the film roll. FIG. 10 is a schematic sectional view showing a fourth step when replacing the film roll. FIG. 11 is a schematic sectional view showing a fifth step when replacing the film roll. FIG. 12 is an enlarged view of a portion X in FIG. 10.

FIG. 13 is a schematic configuration diagram showing the configuration of another example of the film storage mechanism of the present invention.

FIG. 14 is a schematic configuration diagram showing the configuration of another example of the film storage mechanism of the present invention.

FIG. 15 is a schematic configuration diagram showing the configuration of another example of the film storage mechanism in the present invention.

FIG. 16 is a block diagram illustrating a control system of the bag making and packaging unit according to the embodiment.

FIG. 17 is a flowchart showing the operation of the control device in the case of packing a product using the film stored in the dancer roller when replacing the film roll.

FIG. 18 is a flowchart showing the operation of the control device in the case of packing a product using the film stored in the dancer roller when replacing the film roll.

FIG. 19 is a schematic diagram showing the operation of the dancer roller during normal operation and when replacing the film roll.

FIG. 20 is a flow chart showing the operation of the control device when wrapping a product using the film stored in the film storage mechanism of the film joining device when changing the film roll.

FIG. 21 is a flow chart showing the operation of the control device when wrapping a product using the film stored in the film storage mechanism of the film bonding apparatus when changing the film roll.

FIG. 22 is a schematic cross-sectional view showing the operation of the film storage mechanism of the film joining apparatus during normal operation and when replacing the film roll.

FIG. 23 is a schematic cross-sectional view showing the operation of the film storage mechanism of the film joining apparatus during normal operation and when changing the film roll.

FIG. 24 is a schematic cross-sectional view showing the operation of the film storage mechanism of the film joining apparatus during normal operation and when changing the film roll.

FIG. 25 is a schematic cross-sectional view showing the operation of the film storage mechanism of the film bonding apparatus during normal operation and when changing the film roll.

Figure 26 shows the film joining equipment during normal operation and when changing film rolls. FIG. 4 is a schematic cross-sectional view showing the operation of the illumin storage mechanism. BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is a schematic side view showing a configuration of a bag making and packaging machine according to one embodiment of the present invention. FIG. 2 is a schematic rear view showing the configuration of the bag making and packaging machine shown in FIG. 1 when viewed from the film roll side. FIG. 3 is a schematic plan view showing a configuration when the bag making and packaging machine of FIG. 1 is viewed from above. FIG. 4 is a schematic perspective view showing an outline of a transport path of the film 2.

In FIG. 1, the bag making and packaging machine 100 is composed of a film roll section 100, a film transport section 200, and a bag making and packaging section 300.

As shown in FIG. 3, the film opening 100 includes a film roll support 101 and a film joining device 102 described later. The film roll support 101 has a support shaft 3 and a circle. It has a plate-shaped roll stopper 4 and a motor 6. The support shaft 3 is positioned at the rear of the bag making and packaging machine 100 by the support mechanism 50 shown in FIG. 2 in a direction parallel to and perpendicular to the installation surface E of the bag making and packaging machine 100. It is supported so that it can rotate between them. The mouth stopper 4 is fixed to an end of the support shaft 3 on the support mechanism 50 side.

The support shaft 3 is rotated by a motor 6 via a timing belt (not shown). Note that the support mechanism 50 is provided with a stopper (not shown) for fixing the support shaft 3 in the horizontal direction and the vertical direction as described above.

When mounting the film roll 1, first, the support shaft 3 is set parallel to the installation surface E of the bag making and packaging machine 100, and the roll core 31 of the film roll 1 is passed through the support shaft 3. Then, insert until the end face contacts the roll stopper 4. Next, the stopper 5 is protruded from the peripheral surface of the shaft 3 by a locking operation, and the opening core 31 of the film roll 1 is engaged with the stopper 5, and the film opening 1 is attached to the support shaft 3. Fix it.

Next, the support shaft 3 is rotated in the direction of arrow A in FIG. 1, and the support shaft 3 and the film roll 1 are fixed in a posture perpendicular to the installation surface E of the bag making and packaging machine 100. At this time, the mouth stopper 4 is parallel to the installation surface E, Film roll 1 is supported.

At the time of bag making and packaging, the film 2 is pulled out from the film roll 1 by rotating the support shaft 3 and the mouth stopper 4 by the motor 6. The film 2 pulled out from the film port support unit 101 passes through the film bonding apparatus 102 shown in FIG. 3, and is transported to the film transport unit 200.

As shown in FIGS. 2 and 3, the film transport unit 200 includes a first guide port 7, a second guide roller 8, a turn bar 9, an evening bar up / down mechanism 10, and a plurality of ports. —Has Luba 11 and Dancer Roller 12. The first guide roller 7 and the second guide roller 8 are arranged vertically, and the plurality of roll bars 11 and the dancer rollers 12 are arranged horizontally. The turn bar 9 is provided at a position obliquely at 45 degrees to the first guide roller 7 and the second guide roller 8. Normally, the film 2 must be conveyed with the back side facing upward to fill the product inside. For this reason, it is necessary to convey the film 2 wound with the front side outside in the bag making and packaging machine with the back side up.

The reversal of the film is performed by rolling the film 2 between the first and second guide rolls 7 and 8 and the turn bar 9.

As shown in FIG. 4, the film 2 passes through the first guide roller 7 and is then bent along the second guide roller 8 so that the traveling direction is changed by 180 degrees, and You will be led to 1-9. Further, when the film 2 is guided to the room 9 inclined at 45 degrees, the traveling direction of the film 2 is further changed by 90 degrees, and the front and back of the film 2 are reversed. Thus, the film 2 is transported upward in a state where the width direction is horizontal. Thereafter, as shown in FIG. 3, the film 2 is conveyed to the bag making and packaging unit 300 with the back surface facing upward.

The turn bar 9 is moved up and down as shown by the arrow B by the turn bar up and down mechanism 10 in FIG. By moving the turn bar 9 up and down, the position of the film 2 in the width direction can be changed. For example, when the width of the film 2 changes, the center of the film 2 conveyed to the bag making and packaging section 300 is located at the rear. The hopper 22 must be conveyed in a state in which it coincides with the center of the hopper 22. In the case of this bag making and packaging machine 100, since the height position of the lower end face of the film roll 1 to be conveyed is fixed, the evening bar 9 is moved up and down and the centering is performed according to the width of the film 2. To

The dancer roller 12 shown in FIGS. 1 and 3 detects the tension of the film 2 as follows. The film 2 is transported at a controlled speed by a bull down belt 19 of a bag making and packaging unit 300 described later.

When the tension of the film 2 changes, the position of the dancer roller 12 urged downward moves up and down from the reference position. A mouth cell fixed to the frame of the film transport unit 200 is connected to the dancer roller 12 via a tension panel, and the load cell is moved from the reference position of the dancer roller 12 in accordance with the pulling force of the panel. The shift amount, that is, the tension of the film 2 is detected. The motor 6 for feeding the film 2 is controlled based on the detected tension. That is, when the tension increases, the rotation speed of the motor 6 increases, and when the tension decreases, the rotation speed of the motor 6 decreases, and feedback control is performed to return the dancer roller 12 to the reference position.

The film 2 that has passed through the dancer rollers 12 is guided in the horizontal direction by a plurality of horizontal ports 111 that extend in the horizontal direction. As shown in FIG. The paper is conveyed in the direction of arrow C with its back (surface inside the bag) facing upward, and guided to the bag making and packaging unit 300.

FIG. 5 is a perspective view showing a detailed configuration of the bag making and packaging unit in FIG.

In FIG. 5, the bag making and packaging section 300 has a former 15, a cylinder 16, a vertical seal mechanism 18, a pair of pull-down belts 19, a horizontal seal mechanism 20, and a hopper 22. In the bag making and packaging section 300, the film 2 is formed into a cylindrical shape by passing through the gap between the former 15 and the cylinder 16. The film 2 formed into a cylindrical shape is transported by the pull-down belt 19 while maintaining the cylindrical shape between the cylinder 16 and the pair of pull-down belts 19, and the film 2 overlapped by the vertical sealing mechanism 18 The two side edges 17 are welded in the vertical direction.

Further, the product supplied to the hopper 22 from an upper product supply unit (not shown) passes through the inside of the tube 16 and is filled in the film 2 formed into a tube. The product is filled The film 2 thus obtained is welded in the horizontal direction by the horizontal sealing mechanism 20 and the sealing surface is cut in the horizontal direction, thereby producing a bag 21 filled with the product.

FIG. 6 is a side view showing a detailed configuration of the film drawer in the bag making and packaging machine of FIG. 7 to 11 are schematic cross-sectional views showing the first to fifth steps of the film drawer when the film roll is replaced. FIG. 12 is an enlarged view of a portion X in FIG. 10.

Further, FIGS. 13 to 14 are schematic configuration diagrams showing the configuration of another embodiment of the film storage mechanism in the present invention.

As shown in FIGS. 6 and 7, the film bonding apparatus 102 includes a film holding mechanism 60 for holding and fixing the film when bonding the film, and a film suction mechanism 70 for sucking and holding the film 2. And a film storage mechanism 80. The film storage mechanism 80 includes three fixed rollers 25, two movable rollers 26, a pair of fixed frames 27, a pair of movable frames 28, a rotating shaft 29, and a guide roller 30. Is done.

The three fixed rollers 25, the two movable rollers 26, the rotating shaft 29, and the guide opening roller 30 are arranged in a vertical direction so as to be orthogonal to the traveling direction of the film 2. , Are arranged parallel to each other. The pair of fixed frames 27 are arranged parallel to the traveling direction of the film 2 and at regular intervals. The pair of fixed frames 27 are fixed to the main body frame 600.

Also, a pair of movable frames 28 are arranged in parallel with the traveling direction of the film 2 and at regular intervals. The pair of movable frames 28 are rotatably supported by a pair of fixed frames 27 by a rotation shaft 29.

Both ends of the three fixed rollers 25 and the guide roller 30 are supported by a pair of fixed frames 27 so that each can be rotated. Both ends of the two movable rollers 26 are pivotally supported by a pair of movable frames 28, each of which is rotatable with respect to the movable frame 28. Further, the two movable rollers 26 can swing about a rotation shaft 29 together with a pair of movable frames 28.

The film 2 is guided by a rotating shaft 29, passes through a film suction mechanism 70, and has an outer surface of a first fixed roller 25, an inner surface of a first movable roller 26, and a second surface.

Four After being guided by the outer surface of the second fixed roller 25, the inner surface of the second movable roller 26, and further turned by the outer surface of the third fixed roller 25, It is guided to the lum transport unit 200.

The process in the case where the film 2 is pulled out from the film opening 1 to the end, the film roll 1 is replaced, and the film 2 is joined will be described with reference to FIGS. Here, in FIG. 8 to FIG. 12, the film 2 of the film roll 1 before replacement is denoted by reference numeral 2 to distinguish the film 2 of the old film roll 1 before replacement from the film 2 of the new film roll 1 after replacement. Add a, and add 2b to the film on the new film roll 1.

As shown in FIG. 7, during the bag making and packaging, the film 2 fed from the film roll 1 in the direction of the arrow Y is fixed to the fixed roller 25 and the movable roller 26 of the film storage mechanism 80 of the film bonding apparatus 102. And is transported to the film transport unit 200. At this time, the film holding mechanism 60 and the film suction mechanism 70 are not operating.

As shown in FIG. 8, when the film 2a of the film roll 1 is pulled out to the end, the film 2a is fixed to the film joining device 102 by the film pressing mechanism 60, and the film is sucked by the film suction mechanism 70. Hold film 2a by suction. Further, the film 2a is cut at the end as shown by the arrow D, and the film 2a is separated from the roll core 31 of the film roll 1.

Next, as shown in FIG. 9, the pair of movable frames 28 is rotated together with the two movable rollers 26 in the direction of arrow F with respect to the pair of fixed frames 27 of the film storage mechanism 80, The two movable rollers 26 are separated from the three fixed rollers 25. At this time, since the film 2a is fixed by the film holding mechanism 60, the portion of the film 2a upstream of the film holding mechanism 60 is moved by the movement of the two movable openings 26. The end of the film 2 a that has been moved toward the film bonding apparatus 102 and cut is guided to the film suction mechanism 70.

In this case, since the film 2a is fixed by the film holding mechanism 60, the film 2a is not sent out to the film transport section 200 side in the transport direction of the film 2a. Therefore, when transport of film 2a is resumed, Lumm 2a can be transported smoothly.

Further, since the entire width of the film 2a is sucked by the film suction mechanism 70, when the film 2a is pulled by the film storage mechanism 80, the film tension is maintained while preventing the film from meandering. In this state, the film can be pulled up, and the end of the film 2a can be prevented from being pulled into the film storage mechanism 80.

Next, the support shaft 3 shown in FIG. 1 is rotated in a direction parallel to the installation surface E of the bag making and packaging machine 100 to engage the roll core 31 of the film opening 1. Release the stopper 5 and remove the roll core 3 1 from the support shaft 3.

Next, the new film roll 1 is mounted on the support shaft 3, the core 3 1 of the new film portal 1 is engaged with the stopper 5, and fixed to the support shaft 3, and the support shaft 3 is attached. Rotate in a direction perpendicular to the installation surface E of the bag making and packaging machine 100 and fix it.

After erecting the new film roll 1, as shown in FIGS. 10 and 12, the tip of the film 2 b wound on the new film roll 1 is pulled out to the film suction mechanism 70, and the film is sucked into the film suction mechanism 70. The end of the film 2a being sucked is overlapped with the end, and the end of the film 2a and the end of the film 2b are joined using the adhesive tape 24 of FIG. Thereafter, as shown in FIG. 11, the film holding mechanism 60 and the film suction mechanism 70 are released.

After joining the film 2a and the film 2b in this manner, the support shaft 3 and the mouth stopper 4 are again rotated by the motor 6 to pull out the film in the direction of arrow Y, and the bag making and packaging is resumed. I do. At this time, the film 2b joined to the film 2a is transported, and the pair of movable frames 28 move in the direction of arrow G together with the movable roller 26 by the tension of the film 2b pulled by the film 2a. I do.

As described above, when the film roll 1 is replaced, the film 2a of the film roll 1 before the replacement is fixed by the film holding mechanism 60, the film is sucked by the film suction mechanism 70, and the film is stored by the film storage mechanism 80. The end of 2a can be moved up to the film suction mechanism 70. Thus, the end of the film 2a sucked by the film suction mechanism 70 and the tip of the film 2b of the replaced film roll 1 can be easily joined using the adhesive tape 24.

As a result, the film 2a of the film roll 1 before the replacement can be used without leaving the end, and it is possible to eliminate the loss of the film. In addition, since there is no film to be disposed of as unnecessary, waste can be reduced.

Further, since the end of the film 2a and the tip of the film 2b can be joined while the film 2a is fixed by the film holding mechanism 60 and the film suction mechanism 70, the film 2a and the film 2 are separated. It is possible to join easily and securely without sagging.

In the present embodiment, the bonding of the film 2 is performed using the adhesive tape 24. However, the bonding of the film 2 can be performed by heat fusion. For example, instead of using an adhesive tape, in the film suction mechanism 70, the overlapping portion of the film 2a and the film 2b is thermally fused in the width direction.

Further, in the present embodiment, the film is moved closer by moving the two movable rollers 26 relative to the three fixed rollers 25 in the direction of arrow H. As shown in FIG. 3, it is also possible to move one movable roller 26 relative to two fixed rollers 25 to move the movable roller 26.

However, as shown in the present embodiment, by moving the two movable rollers 26 relative to the three fixed rollers 25, the moving distance of each of the two movable rollers 26 is reduced. Since it is possible to draw many films while keeping it short, multiple fixed rollers 25 and movable rollers 26 are provided, and multiple movable rollers 26 are moved relative to multiple fixed rollers 25. It is preferable to move. Furthermore, as shown in Fig. 14, a suction mechanism is provided between the two fixed rollers 25 for guiding the film, and the film can be pulled up by sucking the film in the direction of arrow I by the suction mechanism. It is.

Also, as shown in FIG. 15 (a), the film 2 passing between the three fixed rollers 25 and the two movable rollers 26 is connected to the two film openings 26 by arrows J. By moving the film 2 in the direction shown, the film 2 is moved as shown in Fig. 15 (b). It is also possible to get close.

In this embodiment, a case where the present invention is applied to a vertical piling machine that performs bag making while moving a film in a vertical direction has been described.However, the present invention is directed to moving a film in a horizontal direction. The present invention can be similarly applied to a horizontal packaging machine that performs bag making.

In the bag making and packaging machine 100 of the present embodiment, when the film 2 is fed to the final end, the film 2 can no longer be fed as shown in FIG. I have to stop. However, even if the supply operation of the product from the product supply unit to the bag making and packaging unit 300 is stopped, some products 23 (see FIG. 5) have already been released from the product supply unit at that point. Therefore, if these falling goods 23 are not wrapped, they must be collected as unpackaged goods.

Therefore, the bag making and packaging machine 100 of the present embodiment uses the film stored in the dancer rollers 12 of FIG. 1 to wrap the falling products even if the product supply unit is stopped. And a method of packaging using the film stored in the film storage mechanism 80 of the film bonding apparatus 102. Hereinafter, after the control system of the bag making and packaging machine 100 of the present embodiment is described, control for packaging products using the film 2 stored in the dancer rollers 12 when the film roll 1 is replaced. The control for packaging a product using the film 2 stored in the film storage mechanism 80 when the film roll 1 is replaced will be described in order.

FIG. 16 is a block diagram showing a control system of the bag making and packaging machine 100 of the present embodiment. In FIG. 16, the product supply unit 700 is arranged above the bag making and packaging unit 300 in FIG. 1, and supplies a fixed amount of the product 23 (FIG. 5) to the bag making and packaging unit 300. I do. The product supply unit 700 is, for example, an automatic weighing device that measures the weight of a product to a fixed amount and discharges a predetermined weight of the product to the bag making and packaging unit 300.

As described above, the load cell 210 is connected to the dancer roller 12 of FIG. 1 via a tension spring. The shift amount of the dancer roller 12 from the reference position is detected by the load cell 210. This shift corresponds to the tension of the film 2. The control device 500 includes a CPU (Central Processing Unit) and the like, and controls the rotation speed of the motor 6 based on the output value of the load cell 210 so that the tension of the film 2 becomes constant. The control device 500 controls the operations of the product supply unit 700, the bag making and packaging unit 300, the film holding mechanism 60, and the film suction mechanism 70, as described below.

First, the operation of each unit when the product is packaged using the film 2 stored in the dancer rollers 12 when the film roll 1 is replaced will be described.

FIGS. 17 and 18 are flow charts showing the operation of the control device 500 when wrapping a product using the film 2 stored in the dancer roller 12 when the film roll 1 is replaced. FIG. 19 is a schematic diagram showing the operation of the dancer roller 12 during normal operation and when the film roll 1 is replaced.

During normal spinning (step S 1), the controller 500 rotates the motor 6 based on the output value of the load cell 210 so that the tension of the film 2 becomes constant, as described above. Control the number.

As shown in FIG. 19, the dancer roller 12 is urged downward by a tension spring 220. During normal operation, the dancer roller 12 moves up and down as shown by the arrow H in accordance with the tension of the film 2 as shown in FIG. 19 (a). As a result, the output value of the load cell 210 changes. In this case, since the dancer roller 12 is spaced downward from the roll bar 11, a part of the film 2 is stored by the dancer roller 12.

The control device 500 determines whether or not the film 2 has been pulled out from the film roll 1 to the end (step S 2). When the film 2 is pulled out to the end, the tension of the film 2 exceeds a predetermined value. Therefore, when the output value of load cell 210 exceeds a predetermined value, control device 500 determines that film 2 has been pulled out to the end.

As shown in FIG. 19 (b), when the film 2 is pulled out to the end, the dancer roller 12 is pressed against the force of the tension spring 220 as the tension of the film 2 increases. It rises so as to exceed the predetermined position P0. As a result, the output value of the contact cell 210 exceeds the predetermined value. When the film 2 has been pulled out to the end, the control device 500 stops the commodity supply section 700 and the motor 6 (step S3). As a result, the supply of the product from the product supply unit 700 to the bag making and packaging unit 300 is stopped. At this point, some products 23 have already been released from the product supply unit 700 into the air.

The control device 500 activates the film holding mechanism 60 of the film bonding device 102 (step S4). Further, the control device 500 operates the film suction mechanism 70 of the film bonding device 102 (step S5).

At this time, the operation of the bag making and packaging unit 300 is continued. That is, the vertical seal mechanism 18, the pull-down belt 19, and the horizontal seal mechanism 20 in FIG. 5 are operating. As a result, the film 2 stored in the dancer rollers 12 is transported to the bag making and packaging unit 300 by the pull-down belt 19.

As shown in Fig. 19 (c), the dancer roller 12 is raised by passing the position between the mouth and the lumber 11 against the force of the pulling panel 220 as shown in Fig. 19 (c). Is stored in the bag making and packaging section 300. As a result, in the bag making and packaging unit 300, the product 23 already released into the air from the product supply unit 700 is packaged.

The control device 500 determines whether or not each of the falling commodities has been packaged (step S6). The number of the falling commodities is determined by the distance from the commodity supply unit 700 to the horizontal sealing mechanism 20 and the operating speed. For example, when driving at a speed of 200 times per minute, two of them are falling. The length of the film used at that time varies depending on the bag size, but in the above-described embodiment, it is set in advance so that the film 2 stored in the dancer rollers 12 can sufficiently cover the film. In this case, the control device 500 counts the number of times each time a product is released from the product supply unit 700, and subtracts the count value when packaging of the product is completed. Therefore, the packaging operation is maintained until the count value of the number of releases becomes zero. (Step S7).

On the other hand, at the end of step S5, the worker can use the film bonding apparatus 102 to perform the work of exchanging the film roll 1 shown in FIGS. Fig. 10 When the joining of the film 2 shown in (1) is completed, the operator notifies the controller 500 of the end of the joining of the film 2 using an operation switch (not shown) or the like.

When the controller 500 confirms that the bonding of the film 2 has been completed (step S8), the controller 500 releases the film holding mechanism 60 of the film bonding apparatus 102 (step S9). Further, the control device 500 releases the film suction mechanism 70 of the film bonding device 102 (step S10). As a result, the operation can be restarted using the film roll 1 after the replacement.

The operator instructs the control device 500 to restart the operation using an operation switch (not shown) or the like. The controller 500 determines whether or not the operation is possible (step S11), and if the operation is possible, returns to step S1 and performs the normal operation.

In this way, the falling product 23 when the final end of the film 2 is detected can be packaged using the film 2 stored in the dancer roller 12. Next, the operation of each unit when packaging a falling product using the film 2 stored in the film storage mechanism 80 of the film bonding apparatus 102 will be described.

FIGS. 20 and 21 are flow charts showing the operation of the control device 500 when wrapping a product using the film 2 stored in the film storage mechanism 80 of the film bonding apparatus 102. . FIGS. 22 to 26 are schematic cross-sectional views showing the operation of the film storage mechanism 80 of the film bonding apparatus 102 during normal operation and when the film roll 1 is replaced. In FIGS. 22 to 26 as well, the film of the film roll 1 before replacement is denoted by reference numeral 2a, and the film of the film roll 1 after replacement is denoted by reference numeral 2b.

In this example, as shown in FIG. 22, a film pressing mechanism 60 is provided at a position of a fixed roller 25 on the upstream side. Further, a load cell 210 is connected to a movable frame 28 of the film storage mechanism 80 via a tension spring 220. The load cell 210 detects the amount of deviation of the movable frame 28 from the reference position. This shift amount corresponds to the tension of the film 2. The control device 500 in FIG. 16 controls the rotation speed of the motor 6 based on the output value of the load cell 210 so that the tension of the film 2a is constant.

In this example, since the film storage mechanism 80 also functions as a dancer roller, The dancer roller 12 of FIG. 1 is not required. In this example, the film roll 1 is supported so that the roll core 31 extends in the horizontal direction, and the fixed roller 25, the movable roller 26, the rotating shaft 29, and the guide port roller 30 extend in the horizontal direction. In this manner, the film bonding apparatus 102 is provided. Thereby, the movable frame 28 swings up and down around the rotation shaft 29. In this case, the first guide port 7, the second guide roller 8, the turn bar 9, and the turn bar up / down mechanism 10 in FIG. 4 become unnecessary.

At the time of normal operation (step S21), the controller 500 controls the motor so that the tension of the film 2a becomes constant based on the output value of the mouth cell 210 as described above. Evening 6 speed is controlled.

As shown in FIG. 22, when stopped, the movable frame 28 is located at the lowermost end by its own weight and the downward bias by the tension spring 220. During normal operation, the movable frame 28 swings up and down as shown by the arrow h according to the tension of the film 2a as shown in FIG. As a result, the output value of the load cell 210 changes. In this case, since the movable roller 26 is separated below the fixed roller 25, a part of the film 2a is stored by the film storage mechanism 80.

The control device 500 determines from the output of the load cell 210 whether or not the film 2a has been pulled out from the film roll 1 to the end (step S22). When the film 2a is pulled out to the end, the tension of the film 2a exceeds a predetermined value. Therefore, when the output value of load cell 210 exceeds a predetermined value, control device 500 determines that film 2a has been pulled out to the end.

FIG. 23 shows a state where the output value of the load cell 210 exceeds a predetermined value. When the film 2a is pulled out to the end, the control device 500 stops the product supply unit 700 and the motor 6 (step S23). As a result, the supply of the product from the product supply unit 700 to the bag making and packaging unit 300 is stopped. However, at this point, some commodities 23 have already been released from the commodity supply unit 700 and are falling.

Next, the control device 500 operates the film holding mechanism 60 of the film bonding device 102 (step S24).

At this time, the operation of the bag making and packaging unit 300 does not stop, and the vertical sealing mechanism 18 in FIG. The pull-down belt 19 and the horizontal sealing mechanism 20 operate, and the film 2 stored in the film storage mechanism 80 is transported to the bag making and packaging unit 300 by the pull-down belt 19.

At this time, as shown in FIG. 24, the movable frame 28 having the movable roller 26 rotates further upward around the rotary shaft 29 against the elastic force of the tension panel 220. As a result, the film 2a stored in the film storage mechanism 80 is sent out to the bag making and packaging unit 300 as indicated by the arrow z. Using this film, the bag making and packaging unit 300 wraps each of the commodities 23 that are falling.

The control device 500 determines whether or not each of the falling commodities has been packaged while subtracting the number of times of release of the commodities, as described above (step S25).

When all the falling products are wrapped, the control unit 500 stops the operation of the bag making and packaging unit 300 (step S26), and then the film suction of the film bonding apparatus 102 is performed. The mechanism 70 is operated (step S27). As shown in FIG. 24, the operator cuts the film 2 a at the terminal position indicated by the arrow D, and separates the film 2 a from the roll core 31.

The control device 500 releases the film holding mechanism 60 of the film bonding device 102 (step S28). As a result, as shown in FIG. 25, the movable roller 26 and the movable frame 28 move downward about the rotation shaft 29 as shown by the arrow F due to their own weight and the elastic force of the tension spring 220. Rotate. As a result, the movable opening roller 26 is separated downward from the fixed roller 25, and the film 2a on the upstream side of the film joining device 102 is moved toward the film joining device 102, and the film storage mechanism 8 Stored at 0. As a result, the end of the cut film 2a is guided to the film suction mechanism 70.

As shown in Fig. 26, after attaching the new film roll 1 to the support shaft, the worker pulls out the end of the film 2b of the new film roll 1 to the film suction mechanism 70, and attaches it to the film suction mechanism 70. The end of the film 2a is overlapped with the end of the film 2a being sucked, and the end of the film 2a is joined to the end of the film 2b.

When the joining of the films 2 is completed, the worker notifies the controller 500 of the end of the joining of the films 2a and 2b using an operation switch (not shown) or the like. When the controller 500 confirms that the bonding of the film 2 has been completed (step S29), the controller 500 releases the film suction mechanism 70 of the film bonding apparatus 102 (step S30). As a result, the operation can be restarted by the film roll 1 after the replacement.

The operator operates the operation switch (not shown) or the like to instruct the control device 500 to operate. The control device 500 determines whether or not operation is possible (step S31), and if operation is possible, returns to step S21 and performs normal operation.

In this manner, the falling commodity 23 when the end of the film 2 is detected can be packed using the film 2a stored in the film storage mechanism 80. In the present embodiment, the support shaft 3 corresponds to a film roll support unit, the film transport unit 200 corresponds to a film transport mechanism, and the film joining device 102 corresponds to a film joining device. Further, the film storage mechanism 80 or the dancer roller 12 corresponds to the film storage mechanism. Further, the film suction mechanism 70 corresponds to a film suction holding mechanism, and the film holding mechanism 60 corresponds to a film fixing and holding mechanism. Further, the motor 6 corresponds to a driving device, the load cell 210 corresponds to a detector and a tension detector, and the control device 500 corresponds to a control unit.

In addition, in this embodiment, as shown in FIG. 24, a mechanism for holding the movable roller 26 in a state of being protruded above the fixed opening roller 25 is added, so that the film is transferred to each roller 26, When it is mounted between the rollers 26, it is only necessary to insert the film between the rollers 26 and 25, so there is an advantage that workability is better than before.

Claims

The scope of the claims

1. A bag making and packaging machine for packaging products while making a bag using a film roll in which a long film is wound into a roll,

A film roll supporting portion for supporting the film roll,

A film transport mechanism that transports the film sent from the film roll; and a film transport mechanism that is provided between the film port support unit and the film transport mechanism; A film joining device for joining the film leading end of the film roll after the exchange,

A bag making and packaging machine, comprising: a film storage mechanism that draws a film upstream of a film bonding position.

2. The film storage mechanism is

The manufacturing method according to claim 1, further comprising: a fixed roller that guides the conveyed film; a movable roller that changes a travel distance of the conveyed film; and a moving mechanism that moves the movable roller toward and away from the fixed roller. Bag packaging machine.

3. The bag making and packaging machine according to claim 2, wherein a plurality of sets of the fixed rollers and the movable rollers are alternately arranged.

4. The moving mechanism is

A fixed frame that supports both ends of the fixed roller,

A movable frame supporting both ends of the movable roller,

A rotating shaft arranged in parallel with the fixed roller and rotatably supporting one end of the movable roller with respect to the fixed frame;

The bag making and packaging machine according to claim 2, wherein the movable roller relatively moves with respect to the fixed roller by rotating the movable frame with respect to the fixed frame about the rotation axis.

5. The film bonding apparatus is

2. The film suction holding mechanism according to claim 1, further comprising a film suction holding mechanism disposed upstream of the film storage mechanism in a film transport direction and suction holding a film separated from a film roll before replacement at the time of film joining. Bag making and packaging machine.

6. The film bonding apparatus is

2. The bag making and packaging machine according to claim 1, further comprising a film fixing and holding mechanism for fixing and holding a film on a film transport mechanism side at the time of film joining on a downstream side of the film storage mechanism.

7. A bag making and packaging machine for packaging products while making a bag using a film port in which a long film is wound into a roll,

A bag-making and packaging section that packs products while making bags;

A product supply unit for supplying a product to the bag making and packaging unit,

A film mouth supporting portion for supporting the film mouth,

A drive device for feeding a film from a film roll supported by the film roll support,

A film transport mechanism for transporting the film sent from the film roll to the bag making and packaging unit;

A film storage mechanism for storing and sending out the film conveyed by the film conveyance mechanism;

A detector for detecting that the film of the film roll has been consumed to the end; and stopping the operation of the commodity supply unit and the driving device in response to an output of the detector, and storing the film in the film storage mechanism. And a control unit for stopping the operation of the bag-making and packaging unit after the predetermined number of bags have been sent out.

8. The detector includes a tension detector for detecting film tension,

The control unit, when the output of the tension detector exceeds a predetermined value, the product supply unit 8. The bag making and packaging machine according to claim 7, wherein the operation of the driving device is stopped.

9. The bag making and packaging machine according to claim 8, wherein the control unit controls the driving device so that the tension of the film becomes constant when the output of the tension detector is equal to or less than a predetermined value.

10. The film storage mechanism is

A fixed roller for guiding the conveyed film,

A movable roller that changes the traveling distance of the film being conveyed,

8. The bag making and packaging machine according to claim 7, further comprising: a moving mechanism for moving the movable roller toward and away from the fixed opening roller.

11. Provided between the film port support portion and the film transport mechanism, the end of the film on the film transport mechanism side at the time of replacing the film roll and the leading end of the film of the replaced film roll. Further equipped with a film joining device for joining

The bag making and packaging machine according to claim 7, wherein the film storage mechanism is provided downstream of a film joining position of the film joining device.

1 2. The film storage mechanism

A fixed roller for guiding the conveyed film,

The bag making and packaging machine according to claim 11, further comprising: a moving mechanism configured to move the movable roller toward and away from the fixed roller.

1 3. The moving mechanism is

A fixed frame that supports both ends of the fixed roller,

A movable frame supporting both ends of the movable roller,

A rotating shaft that is disposed in parallel with the fixed roller, and that rotatably supports one end of the movable frame with respect to the fixed frame, 13. The bag making and packaging machine according to claim 12, wherein the movable roller relatively moves with respect to the fixed roller by rotating the movable frame with respect to the fixed frame about the rotation axis.

1 4. The film joining device

13. The bag-making and packaging device according to claim 12, further comprising a film suction holding mechanism disposed upstream of the film storage mechanism in a film transport direction and suction-holding a film separated from a film roll before replacement at the time of film joining. Machine.

15. The bag-making and packaging machine according to claim 14, wherein the control unit operates the film suction holding mechanism during a film joining operation.

1 6. The film joining device

21. The bag making and packaging machine according to claim 11, further comprising a filem holding and holding mechanism for holding and holding the film on the film transport mechanism side at the time of film joining on the upstream side of the film storage mechanism.

17. The bag making and packaging machine according to claim 16, wherein the control section operates the film fixing and holding mechanism in response to an output of the detector.