JPWO2002098737A1 - Bag making and packaging machine - Google Patents

Abstract

When replacing the film roll, the film of the film roll before replacement is fixed by the film holding mechanism, sucked by the film suction mechanism, and the end of the film is moved to the film suction mechanism by the film storage mechanism. Further, the end of the film sucked by the film suction mechanism and the leading end of the film of the replaced film roll are joined using an adhesive tape. When detecting that the film has been pulled out to the end based on the output value of the load cell, the control device stops the product supply unit and the motor. As a result, when the product supply unit is stopped, the products already supplied from the product supply unit to the bag making and packaging unit are packed using the film stored in the film storage mechanism. Thereafter, the control device stops the operation of the bag making and packaging unit.

Description

Technical field
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 a product while manufacturing a bag, a film roll in which a long film is wound around a roll core is used as a packaging material for the bag.
The film is pulled out by rotating a support shaft that supports the film roll by a motor, and is conveyed to a bag making and packaging unit. When the film wound around the roll core of the film roll is pulled out to the end, at a film joining portion provided at a predetermined distance from the film roll, cut the film using a blade or the like, and use the used film. Replace the film roll with a new one. At that time, the film is pulled out from the new film roll by a predetermined length, and the end of the cut film remaining in the film joining portion and the film leading end of the new film roll are joined using an adhesive tape, or the cut film Is heat-sealed to the end of the film roll.
In this way, the film end portion left in the film joining portion and the film drawn from the new film roll are joined and transported to the bag making and packaging portion.
However, since the distance between the film joining portion and the mounting position of the film roll is large, when the film is cut at the film joining portion, the film located between the roll core and the film joining portion cannot be used unnecessarily. Had been destroyed as.
Although the length of the discarded film varies depending on the bag size, it corresponds to a length of 3 to 5 bags in a normal size, and a cumulative loss is a great loss. In addition, since it is disposed of as unnecessary, it may cause an increase in waste.
Also, 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, but at that time, even if the release of the product from the product supply unit is stopped at the same time, Products that have already been released reach the bag making and packaging section with a time lag, so even if you try to pack the products at that time, the bag making and packaging machine is already stopped, so you should pack the released products. There was a problem that such products were eventually wasted.
Disclosure of the invention
SUMMARY OF THE INVENTION An object of the present invention is to provide a bag making and packaging machine that can use a film wound on a film roll to the end without waste, and that can easily replace the film roll and join the film.
It is another object of the present invention to provide a bag making and packaging machine capable of securely packaging a product already discharged from a product supply unit even if a film cannot be unwound from a film roller.
A bag-making and packaging machine according to one aspect of the present invention is a bag-making and packaging machine for packaging goods while making a bag using a film roll in which a long film is wound into a roll, and a film that supports the film roll. Roll support, a film transport mechanism for transporting the film sent from the film roll, provided between the film roll support and the film transport mechanism, and the end of the film on the film transport mechanism side when replacing the film roll. And a film joining device for joining the film leading end of the film roll after the exchange, and the film joining device is provided with a film storage mechanism that draws a film upstream of the film joining position.
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 a 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 to join the ends of the cut film to the film. It can be guided to the device. This makes it possible to join 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 in the film joining apparatus.
Therefore, it is possible to use the film of the film roll before replacement without leaving the base of the roll core, and it is possible to use up the film to the end. In addition, since there is no film to be disposed of as unnecessary material, 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. Can be.
Thus, when the film roll is replaced, the cut end of the film can be approached 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. Thus, the film storage mechanism can be made compact, and the installation space is reduced.
Furthermore, when the film is joined, the plurality of fixed rollers and the movable roller alternately contact one surface and the other surface of the film. And meandering as well as loosening of the film can be prevented. As a result, it is possible to prevent defects in manufacturing the bag.
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 is arranged in parallel with the fixed roller, and one end of the movable roller is rotatable with respect to the fixed frame. A rotating shaft that supports the rotating shaft, and the movable frame is rotated about the rotating shaft with respect to the fixed frame, so that the movable roller can move relative to the fixed roller.
Further, when changing the film roll, the movable frame is swung about the rotation axis with respect to the fixed frame, and the movable roller is relatively moved with respect to the fixed roller, so that the cut end of the film is stored in the film storage mechanism. Can be approached. Thus, 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, by swinging the movable frame with respect to the fixed frame about the rotation axis, the movable roller located on the downstream side in the film transport direction is rotated. The moving amount can be larger than the moving amount of the movable roller located on the upstream side. 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 sucks and holds the film separated from the film roll before replacement during film bonding.
Thus, the film on the downstream side can be stored by the film storage mechanism while the end of the film is suction-held.
At this time, the cut end of the film is guided to the film joining device, and the end of the film 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 film joining 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 roll is transported by the film transport mechanism. When changing the film roll, cut the film on the film transport mechanism side near the film roll, and then store the cut film in the film storage mechanism to guide the end of the cut film to the film joining device. Can be. 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 can be used up to the terminal end, and the loss of the film can be eliminated. In addition, since there is no film to be disposed of as unnecessary material, it is possible to reduce waste. 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 product supply unit that supplies products to the bag making and packaging unit, a film roll support unit that supports the film roll, and a driving device that sends out the film from the film roll supported by the film roll support unit. And, a film transport mechanism for transporting the film sent from the film roll to the bag making and packaging section, a film storage mechanism for feeding while storing the film transported by the film transport mechanism, and the film of the film roll is consumed to the end The operation of the product supply unit and the drive unit is stopped in response to the output of the detector, and the filter stored in the film storage mechanism is stopped. Beam is that a control unit for stopping the operation of the bag manufacturing and packaging unit after being fed a predetermined bag fraction.
In the bag making and packaging machine of the present invention, a film is sent out from a film roll and transported to a bag making and packaging unit by a film transport mechanism. At this time, a part of the conveyed film is sent out while being stored by the film storage mechanism. Further, each time a product is supplied from the product supply unit to the bag making and packaging unit, the product is packed in the bag making and packaging unit.
Then, when the film of the film roll is consumed to the end, the detector detects this, and 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 is transporting while consuming the film stored in the film storage mechanism. Wrap the goods in As a result, even if the film roll 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 is performed, and after the completion of the packaging, the operation of the bag making and packaging unit is stopped by the control unit.
In this way, it is possible to wrap products already supplied from the product supply unit to the bag making and packaging unit when the product supply unit is stopped, 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 packaging 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.
Thereby, when the operation of the product supply unit is stopped, it is possible to reliably package the product already supplied from the product supply unit to the bag making and packaging unit.
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.
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. Further, when the film roll is replaced, the cut film end can be moved to the film storage mechanism and stored in the film storage part having no room. In this way, 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 exchanged.
The bag making and packaging machine includes 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 when exchanging the film roll between the film roll support portion and the film transport mechanism. Further provisions may be made. The film storage mechanism may be provided downstream of the film joining position of the film joining apparatus.
In this case, when replacing the film roll, by cutting the film sent from the film roll in the vicinity of the film roll and then approaching the cut film to the film storage mechanism, the cut film end to the film joining device. Can be guided. This makes it possible to join the terminal 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 can be used up to the terminal end, and the loss of the film can be eliminated. In addition, since there is no film to be disposed of as unnecessary material, it is possible to reduce waste. As a result, the cost of bag making and packaging can be reduced.
Further, it is possible to wrap products already supplied from the product supply unit to the bag making and packaging unit when the product supply unit is stopped using the film of the film storage mechanism provided in the film bonding apparatus.
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.
As a result, the movable roller moves relative to the fixed roller in accordance with the tension of the film, so that the film can be sent out to the bag making and packaging unit while simultaneously adjusting the tension of the film and storing the 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. Further, 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 alternately arranged 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 to the bag making and packaging unit. When the film roll is replaced, the end of the cut film can be moved to the film storage mechanism. In this way, the feeding and storing of the film can be realized by the film storing 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 disposed in parallel with the fixed roller and rotatably supports one end of the movable frame with respect to the fixed frame. A rotating shaft, and the movable frame swings about the rotating shaft with respect to the fixed frame, so that the movable roller can move relatively to the fixed roller.
Thus, when the product supply unit stops, the film stored in the film storage mechanism can be sent out to the bag making and packaging unit because the movable frame approaches and separates from the fixed frame about the rotation axis. Further, when the film roll is replaced, the movable frame swings about the rotation axis with respect to the fixed frame, so that the end of the cut film can be approached to the film storage mechanism.
The film bonding apparatus may further include a film suction holding mechanism that suctions and holds the cut end portion of the film on the 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 with respect to the transport direction of the film.
Thereby, while maintaining the appearance of the cut film, the film end can be guided to the film joining apparatus, and easily joined to the leading end of the film of the replaced film roll without loosening the film end. It becomes possible.
The controller can operate the film suction holding mechanism during the film joining operation. As a result, it is possible to reliably prevent the film from shifting during film joining.
The film joining 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 joining.
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, breakage of the film due to a tensile load applied to the film roll can be prevented.
The control unit may operate the film fixing and holding mechanism in response to the output of the detector. Thereby, breakage of the film due to a tensile load applied to the film roll can be reliably prevented.
As described above, according to the present invention, a product 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.
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 an embodiment of the present invention. FIG. 2 is a schematic rear view showing the configuration when the bag making and packaging machine of FIG. 1 is viewed from the film roll portion 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 the outline of the transport path of the film 2.
In FIG. 1, a bag making and packaging machine 1000 includes a film roll unit 100, a film transport unit 200, and a bag making and packaging unit 300.
As shown in FIG. 3, the film roll unit 100 includes a film roll support unit 101 and a film joining device 102 described later. The film roll support unit 101 includes a support shaft 3, a disc-shaped roll stopper 4, and a motor 6. Have.
The support shaft 3 is supported by the support mechanism 50 shown in FIG. 2 at the rear part of the bag making and packaging machine 1000 so as to be rotatable between a direction parallel to the installation surface E of the bag making and packaging machine 1000 and a direction perpendicular thereto. Have been. The roll stopper 4 is fixed to an end of the support shaft 3 on the support mechanism 50 side.
The support shaft 3 is driven to rotate by a motor 6 via a timing belt (not shown). 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 the film roll 1 is mounted, first, the support shaft 3 is set to be parallel to the installation surface E of the bag making and packaging machine 1000, the roll core 31 of the film roll 1 is passed through the support shaft 3, and the end face thereof is Insert it until it comes into contact with the roll stopper 4. Next, the stopper 5 is protruded from the peripheral surface of the shaft 3 by a locking operation, and the roll core 31 of the film roll 1 is engaged with the stopper 5 to fix the film roll 1 to the support shaft 3.
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 1000. At this time, the roll stopper 4 is parallel to the installation surface E, and the film roll 1 is supported by this.
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 roll stopper 4 by the motor 6.
The film 2 pulled out from the film roll supporting portion 101 passes through a film joining device 102 shown in FIG.
As shown in FIGS. 2 and 3, the film transport unit 200 includes a first guide roller 7, a second guide roller 8, a turn bar 9, a turn bar vertical mechanism 10, a plurality of roll bars 11, and a dancer roller 12. I have. The first guide roller 7 and the second guide roller 8 are vertically arranged, and the plurality of roll bars 11 and the dancer rollers 12 are horizontally arranged. 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.
In the bag-making and packaging section 300 described later, the film 2 is usually transported upward with the back surface of the film 2 in order to fill the inside with the film 2 while filling the product. 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 extending 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 bent along the second guide roller 8 so that the traveling direction is changed by 180 degrees and guided to the turn bar 9. I will be. Further, when the film 2 is guided by the turn bar 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. Thereby, 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 in the up and down direction 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 film 2 conveyed to the bag making and packaging unit 300 must be conveyed in a state where the center in the width direction coincides with the center of the hopper 22 described later. In the case of the bag making and packaging machine 1000, since the height position of the lower end face of the film roll 1 of the transport source is fixed, the turn bar 9 is moved up and down to perform centering according to the width of the film 2.
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 speed controlled by a pull-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 load cell fixed to the frame of the film transport unit 200 is connected to the dancer roller 12 via a tension spring, and the load cell shifts from the reference position of the dancer roller 12 in accordance with the tension of the spring, that is, a film amount. 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 having passed through the dancer rollers 12 is guided in the horizontal direction by a plurality of roll bars 11 extending in the horizontal direction, and as shown in FIG. (Surface) is directed upward in the direction of arrow C 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 unit 300 includes a former 15, a tube 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 unit 300, the film 2 is formed into a tubular shape by passing through the gap between the former 15 and the tube 16. The cylindrical film 2 is conveyed by the pull-down belt 19 while maintaining the cylindrical shape between the cylinder 16 and the pair of pull-down belts 19, and both side edges 17 of the film 2 overlapped by the vertical seal mechanism 18. 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 fills the film 2 formed into a tube. The film 2 filled with the product is laterally welded by the horizontal sealing mechanism 20 and the sealing surface is cut in the horizontal direction, and the bag 21 filled with the product is manufactured.
FIG. 6 is a side view showing a detailed configuration of the film feeding device 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 feeding device when replacing the film roll. FIG. 12 is an enlarged view of a portion X in FIG.
Further, FIGS. 13 and 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 pressing mechanism 60 for pressing and fixing the film, a film suction mechanism 70 for sucking and holding the film 2, and a film storage mechanism 80 when bonding the films. Have.
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.
The three fixed rollers 25, the two movable rollers 26, the rotating shaft 29, and the guide roller 30 are vertically arranged so as to be orthogonal to the traveling direction of the film 2, and are arranged in parallel with each other. I have. 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.
A pair of movable frames 28 are also arranged in parallel with the traveling direction of the film 2 and at a certain interval. 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 pivotally supported by a pair of fixed frames 27, and 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 the rotating shaft 29, passes through the film suction mechanism 70, the outer surface of the first fixed roller 25, the inner surface of the first movable roller 26, and the outer surface of the second fixed roller 25. The surface is guided by the inner surface of the second movable roller 26 and further turned by the outer surface of the third fixed roller 25, and then guided to the film transport unit 200.
The steps in the case where the film 2 is pulled out from the film roll 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 FIGS. 8 to 12, the film 2 of the film roll 1 before replacement is denoted by reference numeral 2a in order 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. Then, reference numeral 2b is given to the film of the film roll 1 after the replacement.
As shown in FIG. 7, at the time of bag making and packaging, the film 2 fed out from the film roll 1 in the direction of arrow Y passes between the fixed roller 25 and the movable roller 26 of the film storage mechanism 80 of the film joining apparatus 102. 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 apparatus 102 by the film pressing mechanism 60, and the film 2a is suction-held by the film suction mechanism 70. . Further, the film 2a is cut at the terminal end as shown by the arrow D, and the film 2a and the roll core 31 of the film roll 1 are separated.
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 so that the two movable rollers 28 26 is separated from the three fixed rollers 25. At this time, since the film 2a is fixed by the film pressing mechanism 60, the portion of the film 2a upstream of the film pressing mechanism 60 is moved toward the film joining apparatus 102 by the movement of the two movable rollers 26. The end of the cut film 2 a 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 unit 200 side, which is the transport direction of the film 2a. Therefore, when the conveyance of the film 2a is restarted, the film 2a can be smoothly conveyed.
In addition, since the entire width of the film 2a is sucked by the film suction mechanism 70, when the film 2a is pulled up by the film storage mechanism 80, the film is held in a state where the film tension is maintained while preventing the film from meandering. The end of the film 2a can be prevented from being drawn into the film storage mechanism 80.
Next, the support shaft 3 of FIG. 1 is rotated in a direction parallel to the installation surface E of the bag making and packaging machine 1000, and the stopper 5 engaged with the roll core 31 of the film roll 1 is released. The roll core 31 is removed from the support shaft 3.
Next, the new film roll 1 is mounted on the support shaft 3, the roll core 31 of the new film roll 1 is engaged with the stopper 5 and fixed to the support shaft 3, and the support shaft 3 is installed on the bag making and packaging machine 1000. It is rotated in a direction perpendicular to the plane E and fixed.
After the new film roll 1 is erected, as shown in FIGS. 10 and 12, the leading end of the film 2b wound around the new film roll 1 is pulled out to the film suction mechanism 70, and the film sucked by the film suction mechanism 70 The end of the film 2a is overlapped with the end of the film 2a, 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 roll stopper 4 are again rotated by the motor 6, the film is drawn in the direction of arrow Y, and the bag making and packaging is resumed. At this time, the film 2b bonded to the film 2a is conveyed, 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.
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 and is sucked by the film suction mechanism 70, and the end of the film 2a is filmed by the film storage mechanism 80. It can be moved to the 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, it is possible to use the film 2a of the film roll 1 before the replacement without leaving the film 2a up to the terminal end, and it is possible to eliminate loss of the film. In addition, since there is no film to be disposed of as unnecessary material, it is possible to reduce waste.
Furthermore, since the end of the film 2a and the tip of the film 2b can be joined in a state where the film 2a is fixed by the film holding mechanism 60 and the film suction mechanism 70, the film 2a and the film 2b can be easily and reliably attached without being loosened. It becomes possible to join.
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, in the film suction mechanism 70 instead of the adhesive tape, 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 by moving the two movable rollers 26 relative to the three fixed rollers 25 in the direction of arrow H, but as shown in FIG. It is also possible to move one movable roller 26 relative to the two fixed rollers 25 in order 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 kept short. It is preferable to provide a plurality of fixed rollers 25 and a movable roller 26 and move the plurality of movable rollers 26 relative to the plurality of fixed rollers 25 because many films can be pulled.
Further, 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 indicated by arrow I by the suction mechanism. .
Further, as shown in FIG. 15A, the film 2 passing between the three fixed rollers 25 and the two movable rollers 26 is translated by moving the two film rollers 26 in the direction indicated by the arrow J. This makes it possible to move the film 2 as shown in FIG.
In the present embodiment, the case where the present invention is applied to a vertical pillow wrapping machine that performs bag making while moving the film in the vertical direction has been described, but the present invention is directed to manufacturing while moving the film in the horizontal direction. The present invention can be similarly applied to a horizontal pillow packaging machine for bagging.
In the bag making and packaging machine 1000 according to the present embodiment, when the film 2 is fed to the final end, as shown in FIG. 8, the film 2 can no longer be fed, and the entire apparatus must be stopped. 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 time. If these falling commodities 23 are not wrapped, they must be collected as unpackaged products.
Therefore, in the bag making and packaging machine 1000 of the present embodiment, even if the product supply unit is stopped, in order to package the falling product, a method of packaging using the film stored in the dancer roller 12 of FIG. And 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 1000 according to the present embodiment is described, control for wrapping a product using the film 2 stored in the dancer roller 12 when replacing the film roll 1 and replacement of the film roll 1 The control for wrapping a product using the film 2 stored in the film storage mechanism 80 at times will be described in order.
FIG. 16 is a block diagram showing a control system of the bag making and packaging machine 1000 of the present embodiment. 16, a product supply unit 700 is disposed 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. The product supply unit 700 is, for example, an automatic weighing device that measures the weight of a product to a certain amount and discharges a predetermined amount 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 load cell 210 detects the amount of deviation of the dancer roller 12 from the reference position. This shift amount corresponds to the tension of the film 2.
The control device 500 includes a CPU (Central Processing Unit) or 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. Further, the control device 500 controls the operations of the product supply unit 700, the bag making and packaging unit 300, the film pressing mechanism 60, and the film suction mechanism 70, as described below.
First, the operation of each unit when a product is wrapped using the film 2 stored in the dancer roller 12 when the film roll 1 is replaced will be described.
FIG. 17 and FIG. 18 are flowcharts showing the operation of the control device 500 when the product is packaged 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 operation (step S1), the control device 500 controls the number of rotations of 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.
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 indicated by the arrow H according to the tension of the film 2 as shown in FIG. Thereby, the output value of the load cell 210 changes. In this case, since the dancer roller 12 is separated 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 S2). When the film 2 is pulled out to the end, the tension of the film 2 exceeds a predetermined value. Therefore, control device 500 determines that film 2 has been pulled out to the end when the output value of load cell 210 exceeds a predetermined value.
As shown in FIG. 19B, when the film 2 is pulled out to the end, the dancer roller 12 exceeds the predetermined position P0 against the elastic force of the tension spring 220 with the increase in the tension of the film 2. So rise. Thereby, the output value of the load cell 210 exceeds a predetermined value.
When the film 2 has been pulled out to the end, the control device 500 stops the product supply unit 700 and the motor 6 (step S3). Thereby, 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 operates 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. Thereby, the film 2 stored in the dancer roller 12 is transported to the bag making and packaging unit 300 by the pull-down belt 19.
As shown in FIG. 19 (c), the film 2 stored in the dancer roller 12 is formed into a bag by raising the dancer roller 12 to pass through the position between the roll bars 11 against the elastic force of the tension spring 220. It is sent to the packaging unit 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 each of the falling commodities is wrapped (step S6). The number of 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 roller 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 decrements the count value when packaging of the product is completed. Until the count value becomes zero, the packaging operation is maintained. When the count value becomes zero, it is determined that all the falling products have been packaged, and the operation of the bag making and packaging unit 300 is stopped (step S7).
On the other hand, the operator can perform the work of exchanging the film roll 1 shown in FIGS. 7 to 11 using the film bonding apparatus 102 at the end of step S5. When the joining of the film 2 shown in FIG. 10 is completed, the operator notifies the control device 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 pressing mechanism 60 of the film bonding apparatus 102 (Step S9). Further, the control device 500 releases the film suction mechanism 70 of the film joining device 102 (Step S10). As a result, the operation can be restarted using the replaced film roll 1.
The operator instructs the control device 500 to restart the operation using an operation switch (not shown) or the like. The control device 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 commodity 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 flowcharts 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 sectional views showing the operation of the film storage mechanism 80 of the film joining apparatus 102 during normal operation and when the film roll 1 is replaced. 22 to 26, 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, the film pressing mechanism 60 is provided at the position of the fixed roller 25 on the upstream side. Further, a load cell 210 is connected to the movable frame 28 of the film storage mechanism 80 via a tension spring 220. The shift amount of the movable frame 28 from the reference position is detected by the load cell 210. This shift amount corresponds to the tension of the film 2. The control device 500 of FIG. 16 controls the number of rotations of the motor 6 based on the output value of the load cell 210 so that the tension of the film 2a becomes 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 film joining apparatus 102 is moved so that the fixed roller 25, the movable roller 26, the rotating shaft 29, and the guide roller 30 extend in the horizontal direction. Shall be provided. Thus, the movable frame 28 swings up and down around the rotation shaft 29. In this case, the first guide roller 7, the second guide roller 8, the turn bar 9, and the turn bar vertical mechanism 10 in FIG. 4 are not required.
During the normal operation (step S21), the control device 500 controls the number of rotations of the motor 6 based on the output value of the load cell 210 so that the tension of the film 2a is constant, as described above.
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, as shown in FIG. 22, the movable frame 28 swings up and down as indicated by an arrow h according to the tension of the film 2a. Thereby, 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, control device 500 determines that film 2a has been pulled out to the end when the output value of load cell 210 exceeds a predetermined value.
FIG. 23 shows a state where the output value of the load cell 210 has exceeded 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). Thereby, 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 pressing 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, the pull-down belt 19, and the horizontal sealing mechanism 20 in FIG. 5 operate, and the film 2 stored in the film storage mechanism 80 is pulled down. By 19, it is conveyed to the bag making and packaging unit 300.
At this time, as shown in FIG. 24, the movable frame 28 provided with the movable roller 26 rotates further upward around the rotating shaft 29 against the elastic force of the tension spring 220, so that the film storage mechanism 80 The stored film 2a is sent out to the bag making and packaging unit 300 as shown by the arrow z. Using this film, the bag making and packaging unit 300 wraps each of the commodities 23 that are falling.
As described above, the control device 500 determines whether or not each of the falling commodities is wrapped while subtracting the number of release times of the commodities (step S25).
When all the falling commodities are wrapped, the control device 500 stops the operation of the bag making and packaging unit 300 (step S26), and then operates the film suction mechanism 70 of the film joining device 102 (step S27). . The operator cuts the film 2a at the terminal position indicated by the arrow D to separate the film 2a from the roll core 31, as shown in FIG.
The control device 500 releases the film pressing mechanism 60 of the film bonding device 102 (Step S28). Thereby, as shown in FIG. 25, the movable roller 26 and the movable frame 28 rotate downward about the rotation shaft 29 as shown by the arrow F by the own weight and the elastic force of the tension spring 220. As a result, the movable 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 approached to the film joining device 102 and stored in the film storage mechanism 80. 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 a new film roll 1 to the support shaft, the operator pulls out the leading end of the film 2b of the new film roll 1 to the film suction mechanism 70, and the film sucked by the film suction mechanism 70 The end of the film 2a is overlapped with the end of the film 2a and the end of the film 2b is joined to the end of the film 2a.
When the joining of the films 2 is completed, the operator notifies the control device 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 joining of the film 2 has been completed (Step S29), the controller 500 releases the film suction mechanism 70 of the film joining 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 the operation is possible (step S31). If the operation is possible, the process returns to step S21 to perform the normal operation.
In this way, 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 this 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 this embodiment, as shown in FIG. 24, a mechanism for holding the movable roller 26 in a state of being protruded above the fixed roller 25 is added. At this time, it is only necessary to insert the film between the rollers 26 and 25, so that there is an advantage that workability is better than in the past.
[Brief description of the drawings]
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 when the bag making and packaging machine of FIG. 1 is viewed from the film roll portion 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 the outline of the 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 unit in the bag making and packaging machine of FIG.
FIG. 7 is a schematic cross-sectional view showing a first step when exchanging the 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 cross-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.
FIG. 13 is a schematic configuration diagram showing the configuration of another example of the film storage mechanism in the present invention.
FIG. 14 is a schematic configuration diagram showing the configuration of another example of the film storage mechanism in 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 when wrapping 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 when wrapping 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 flowchart showing the operation of the control device when the product is packaged using the film stored in the film storage mechanism of the film joining device when the film roll is replaced.
FIG. 21 is a flowchart 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. 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 changing 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 joining apparatus during normal operation and when replacing the film roll.
FIG. 26 is a schematic cross-sectional view showing the operation of the film storage mechanism of the film bonding apparatus during normal operation and when replacing the film roll.

Claims (17)

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 support portion for supporting the film roll,
A film transport mechanism for transporting the film sent from the film roll,
A film joining device that is provided between the film roll supporting portion and the film transport mechanism, and that joins the end of the film on the film transport mechanism side and the film tip of the replaced film roll when replacing the film roll. Prepare,
A bag making and packaging machine, wherein the film bonding apparatus includes a film storage mechanism that draws a film upstream of the film bonding position. The film storage mechanism,
2. The bag-making and packaging machine according to claim 1, further comprising: a fixed roller for guiding the conveyed film; a movable roller for changing a traveling distance of the conveyed film; and a moving mechanism for moving the movable roller toward and away from the fixed roller. 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. The moving mechanism includes:
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 a 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. The film bonding apparatus,
2. The bag-making apparatus 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 the film separated from the film roll before replacement at the time of film joining. Packaging machine. The film bonding apparatus,
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 the film transport mechanism side at the time of film joining on a downstream side of the film storage mechanism. 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 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 roll support portion for supporting the film roll,
A drive device for feeding a film from a film roll supported by the film roll support portion,
A film transport mechanism that transports the film sent from the film roll to the bag making and packaging unit,
Film storage mechanism that sends out while storing the film transported by the film transport mechanism,
A detector for detecting that the film of the film roll has been consumed to the end,
In response to the output of the detector, the operation of the product supply unit and the driving device is stopped, and the operation of the bag making and packaging unit is stopped after the film stored in the film storage mechanism has been sent out for a predetermined bag. A bag making and packaging machine comprising a control unit. The detector includes a tension detector that detects a tension of the film,
The bag making and packaging machine according to claim 7, wherein the control unit stops the operations of the product supply unit and the driving device when an output of the tension detector exceeds a predetermined value. 9. The bag making and packaging machine according to claim 8, wherein the control unit controls the driving device such that the tension of the film becomes constant when the output of the tension detector is equal to or less than a predetermined value. The film storage mechanism,
Fixed rollers for guiding the film to be conveyed,
A movable roller that changes the traveling distance of the film being conveyed,
The bag making and packaging machine according to claim 7, further comprising: a moving mechanism that moves the movable roller toward and away from the fixed roller. A film joining device that is provided between the film roll supporting portion and the film transport mechanism and that joins the end of the film on the film transport mechanism side and the leading end of the film of the replaced film roll when the film roll is replaced. Further comprising a device,
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. The film storage mechanism,
Fixed rollers for guiding the film to be conveyed,
A movable roller that changes the traveling distance of the film being conveyed,
The bag making and packaging machine according to claim 11, further comprising: a moving mechanism that moves the movable roller toward and away from the fixed roller. The moving mechanism includes:
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 a 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. The film bonding apparatus,
13. The bag making and packaging machine according to claim 12, further comprising a film suction holding mechanism that is arranged upstream of the film storage mechanism in a film transport direction and that suctions and holds a film separated from a film roll before replacement during film joining. 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. The film bonding apparatus,
The bag making and packaging machine according to claim 11, further comprising a film fixing and holding mechanism for fixing and holding a 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 unit operates the film fixing and holding mechanism in response to an output of the detector.

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