JP4320248B2 - Bag making and packaging machine - Google Patents

Description

[0001]
【Technical field】
  The present invention relates to a bag making and packaging machine provided with a film squeezing device.
[0002]
[Background]
  Conventionally, in a bag making and packaging machine that fills and packages products while manufacturing bags, a film roll in which a long film is wound around a roll core is used as a bag packaging material.
[0003]
  The film is pulled out by a support shaft that supports the film roll being rotated by a motor, and is conveyed to the bag making and packaging unit. When the film wound on the roll core of the film roll is pulled out to the end, the film is cut using a knife or the like at the film joint provided at a predetermined distance from the film roll, Replace the film roll with a new film roll. At that time, the film is pulled out from the new film roll for a predetermined length, and the end of the cut film remaining in the film joint and the film tip of the new film roll are joined using an adhesive tape, or the cut film And the film tip of a new film roll are heat-sealed.
[0004]
  In this way, the film end portion left in the film bonding portion and the film drawn from the new film roll are bonded and conveyed to the bag making and packaging portion.
[0005]
  However, since the distance between the film bonding portion and the film roll mounting position is long, if the film is cut at the film bonding portion, the film located between the roll core and the film bonding portion cannot be used. Had been discarded as.
[0006]
  Although the discarded film length differs depending on the bag size, it corresponds to a length of 3 to 5 bags in a normal size, and when it is accumulated, it is a large loss. Moreover, since it is disposed of as an unnecessary item, it also causes an increase in garbage.
[0007]
  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, Since already released products arrive at the bag making and packaging unit with a time lag, even if you try to wrap the products at that time, the bag making and packaging machine has already stopped, so wrap the released products. In the end, there was a problem that such products were wasted.
[0008]
DISCLOSURE 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 without waste until the end, and that can easily replace the film roll and join the film.The
[0009]
  A bag making and packaging machine according to one aspect of the present invention is a bag making and packaging machine for packaging products using a film roll in which a long film is wound in a roll shape, and supporting the film roll. A roll support unit, a film transport mechanism for transporting a film fed from the film roll, a film transport mechanism provided between the film roll support unit and the film transport mechanism, and an end of the film on the film transport mechanism side when replacing the film roll; A film joining apparatus for joining the film tip of the film roll after replacement at the film joining position;, A bag making and packaging unit for packaging products while making bags, a product supply unit for supplying products to the bag making and packaging unit, a film roll supporting unit for supporting the film roll, and a film roll supported by the film roll supporting unit A drive device for feeding the film from the device, a detector for detecting that the film of the film roll has been consumed to the end, a bag making and packaging unit, a product supply unit, and a control unit for controlling the operation of the drive deviceThe film bonding apparatus includes a film storage mechanism that stores the film by dragging the film upstream from the film bonding position after the film is separated from the film roll before replacement.The film storage mechanism sends out the film transported by the film transport mechanism while the product is packaged by the bag making and packaging unit, and the control unit responds to the output of the detector and supplies the product supply unit and The operation of the driving device is stopped, the operation of the bag making and packaging unit is stopped after the film stored in the film storage mechanism is sent out for a predetermined bag, and the film storage mechanism is replaced after the operation of the bag making and packaging unit is stopped. After the film is separated from the previous film roll, the film located upstream from the film bonding position is squeezed to store the film.Is.
[0010]
  In the bag making and packaging machine according to the present invention, the film fed from the film roll is transported by the film transport mechanism. When exchanging the film roll, after cutting the film sent from the film roll before the exchange near the film roll, the end of the cut film is dragged to the film storage mechanism so that the end of the cut film is bonded to the film. It can be guided to the device. Thereby, it becomes possible to join in the film joining apparatus the film termination | terminus in the film conveyance mechanism side, and the film front-end | tip of the film roll after replacement | exchange.
[0011]
  Therefore, the film of the film roll before replacement can be used without leaving the base of the roll core, and the film can be used up to the end. Moreover, since there is no film to be disposed of as an unnecessary object, it becomes possible to reduce waste. As a result, the cost of bag making packaging can be reduced.
[0012]
Moreover, a film is sent out from a film roll and is conveyed to a bag making packaging part by a film conveyance mechanism. At this time, a part of the conveyed film is sent out while being stored by the film storage mechanism. Each time a product is supplied from the product supply unit to the bag making and packaging unit, the product is packaged in the bag making and packaging unit.
When the film on the film roll is consumed to the end, the detector detects this, and in response thereto, the control unit stops the operations of the product supply unit and the driving device.
However, at that time, some products that are in the process of transportation exist between the product supply unit and the bag making and packaging unit, so the bag making and packaging unit is in the process of transporting while consuming the film stored in the film storage mechanism. Package the products in Thereby, even if it falls into the state which cannot send out the film from a film roll, about the goods in the middle of conveyance, it is packaged by the bag making packaging part. Then, the packaging of these products can be performed, and after the completion of the packaging, the operation of the bag making and packaging unit is stopped by the control unit.
[0013]
In this manner, the product 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.
[0014]
  Further, a plurality of sets of fixed rollers and movable rollers may be provided alternately. Thereby, a film storage mechanism can be comprised compactly and an installation space becomes small.
[0015]
  In addition, when the films are joined, multiple fixed rollers and movable rollers are alternately in contact with one side and the other side of the film, minimizing changes in film tension when restarting operations after film roll replacement. It is possible to prevent meandering as well as film slack. As a result, it is possible to prevent defects when manufacturing the bag.
[0030]
  The detector includes a tension detector that detects the tension of the film, and the control unit can 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. .
[0031]
  Thereby, when the film of the film roll is consumed to the end, the tension of the film surely exceeds a predetermined value, so that the operation of the commodity supply unit and the driving device can be stopped.
[0032]
  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.
[0033]
  Thus, during normal operation, the film tension is kept constant based on the output of the tension detector.
[0034]
  The film length stored in the film storage unit is preferably 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 stops.
[0035]
  Thereby, 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 can be reliably packaged.
[0036]
  The film storage mechanism includes a fixed roller that guides the conveyed film, a movable roller that changes the travel distance of the conveyed film, and a moving mechanism that moves the movable roller close to and away from the fixed roller. be able to.
[0037]
  As a result, the movable roller moves relative to the fixed roller in accordance with the tension of the film, so that the film is fed to the bag making and packaging unit while the adjustment of the film tension and the storage of the appropriate amount of the film proceed simultaneously. Can do.
[0038]
  Further, when the commodity supply unit is stopped, the movable roller is moved 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. Moreover, at the time of replacement | exchange of a film roll, the cut | disconnected film edge part can be brought near to a film storage mechanism, and can be stored in the film storage part where there was 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 replaced.
[0039]
  The bag making and packaging machine is a film bonding apparatus that joins the end of the film on the film transport mechanism side and the front end of the film roll after the replacement when the film roll is replaced between the film roll support unit and the film transport mechanism. Furthermore, it can be provided. The film storage mechanism can also be provided on the downstream side of the film bonding position of the film bonding apparatus.
[0040]
  In this case, at the time of replacement of the film roll, the film fed from the film roll is cut in the vicinity of the film roll, and then the cut film is moved to the film storage mechanism so that the cut film end is transferred to the film bonding apparatus. Can be guided. Thereby, it becomes possible to join the end of the film on the side of the film transport mechanism and the tip of the film of the film roll after replacement in the film joining apparatus.
[0041]
  Therefore, the film of the film roll can be used all the way to the end, and the loss of the film can be eliminated. Moreover, since there is no film to be disposed of as an unnecessary object, it becomes possible to reduce waste. As a result, the cost of bag making packaging can be reduced.
[0042]
  Moreover, the product 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 of the film storage mechanism provided in the film bonding apparatus.
[0043]
  The film storage mechanism includes a fixed roller that guides the conveyed film, a movable roller that changes the travel distance of the conveyed film, and a moving mechanism that moves the movable roller close to and away from the fixed roller. be able to.
[0044]
  As a result, the movable roller moves relative to the fixed roller according to the tension of the film, so that the film is 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 do.
[0045]
  Further, when the commodity supply unit is stopped, the movable roller is moved 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, at the time of replacement of the film roll, the cut film end portion can be brought close 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 goods is stopped and the storage of the film when the film roll is replaced.
[0046]
  The movable frame may include at least one movable roller, the fixed frame may include at least one fixed roller, and the movable roller and the fixed roller may be alternately arranged along the film conveyance direction.
[0047]
  Accordingly, when the commodity supply unit is stopped, the movable roller is moved 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. Moreover, at the time of replacement | exchange of a film roll, the termination | terminus of the cut | disconnected film can be brought close to a film storage mechanism. In this way, film feeding and storage can be realized by the film storage mechanism.
[0048]
  Movement mechanismIsA fixed frame that supports both ends of the fixed roller, a movable frame that supports both ends of the movable roller, and a rotation shaft that is arranged in parallel to the fixed roller and supports one end of the movable frame so as to be rotatable with respect to the fixed frame. Equipped with a movable frame around the rotation axisTheAgainst fixed frameRotateThereby, it can be set as the structure which a movable roller moves relatively with respect to a fixed roller.
[0049]
  As a result, when the commodity supply unit is stopped, the movable frame moves close to and away from the fixed frame around the rotation axis, whereby the film stored in the film storage mechanism can be sent out to the bag making and packaging unit. When the film roll is replaced, the movable frame swings with respect to the fixed frame about the rotation axis, so that the end of the cut film can be brought close to the film storage mechanism.
[0050]
  The film bonding apparatus may further include a film suction / holding mechanism that sucks and holds an end portion of the cut film on the upstream side of the film storage mechanism in the film transport direction.
[0051]
  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 holding mechanism provided upstream of the film storage mechanism in the film transport direction.
[0052]
  Thereby, the film end can be guided to the film bonding apparatus while maintaining the shape of the cut film, and the film end of the film roll after replacement can be easily bonded without loosening the film end. It becomes possible.
[0053]
  The control unit can operate the film suction and holding mechanism during the film bonding operation. Thereby, it is possible to reliably prevent the film from being displaced at the time of film bonding.
[0054]
  The film bonding apparatus may further include a film fixing and holding mechanism that is disposed on the upstream side of the film storage mechanism in the film transport direction and that fixes and holds the film end portion that is cut at the time of film bonding.
[0055]
  Thereby, 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 by applying a tensile load to the film roll.
[0056]
  The control unit may operate the film fixing and holding mechanism in response to the output of the detector. Thereby, the film can be reliably prevented from being damaged due to the tensile load applied to the film roll.
[0057]
  As described above, according to the present invention, the product 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. Accordingly, there is no waste of merchandise.
[0058]
BEST MODE FOR CARRYING OUT THE INVENTION
  FIG. 1 is a schematic side view showing the 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 side. FIG. 3 is a schematic plan view showing the configuration when the bag making and packaging machine of FIG. 1 is viewed from above. Further, FIG. 4 is a schematic perspective view showing an outline of the transport path of the film 2.
[0059]
  In FIG. 1, the 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.
[0060]
  As shown in FIG. 3, the film roll unit 100 includes a film roll support unit 101 and a film bonding apparatus 102 described later. The film roll support unit 101 includes a support shaft 3, a disk-shaped roll stopper 4, and a motor 6. Have.
[0061]
  The support shaft 3 is supported at the rear portion of the bag making and packaging machine 1000 by a support mechanism 50 shown in FIG. 2 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. Has been. The roll stopper 4 is fixed to the end of the support shaft 3 on the support mechanism 50 side.
[0062]
  The support shaft 3 is rotationally driven 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.
[0063]
  When the film roll 1 is mounted, first, the support shaft 3 is made 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 its end face is Insert until it contacts the roll stopper 4. Next, by the locking operation, the stopper 5 is protruded from the peripheral surface of the shaft 3, the roll core 31 of the film roll 1 is engaged with the stopper 5, and the film roll 1 is fixed to the support shaft 3.
[0064]
  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 the roll stopper 4.
[0065]
  At the time of bag making 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.
[0066]
  The film 2 drawn out from the film roll support unit 101 passes through the film bonding apparatus 102 shown in FIG. 3 and is conveyed to the film conveyance unit 200.
[0067]
  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 up-and-down mechanism 10, a plurality of roll bars 11, and a dancer roller 12. Yes. The first guide roller 7 and the second guide roller 8 are arranged vertically, and the plurality of roll bars 11 and the dancer roller 12 are arranged horizontally. The turn bar 9 is provided at a position that obliquely intersects the first guide roller 7 and the second guide roller 8 at 45 degrees.
[0068]
  In the bag making and packaging unit 300 to be described later, in order to fill a product with the film 2 in a cylindrical shape, the back surface of the film 2 usually has to be conveyed upward. For this reason, in the bag making packaging machine, it is necessary to convey the film 2 wound with the front side facing outward, with the back side facing up.
[0069]
  This inversion of the film is performed by linking the film 2 between the first and second guide rolls 7 and 8 and the turn bar 9.
[0070]
  As shown in FIG. 4, the film 2 passes through the first guide roller 7 and then 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. It is burned. Furthermore, when the film 2 is guided to the turn bar 9 inclined 45 degrees, the traveling direction of the film 2 is further changed 90 degrees, and the front and back of the film 2 are reversed. Thereby, the film 2 is conveyed 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.
[0071]
  Further, the turn bar 9 is moved in the vertical direction as indicated by an arrow B by the turn bar vertical mechanism 10 in FIG. The position in the width direction of the film 2 can be changed by moving the turn bar 9 up and down. For example, when the width of the film 2 is changed, the film 2 to be transported to the bag making and packaging unit 300 must be transported in a state where the center portion in the width direction coincides with the center portion 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 surface of the film roll 1 as the conveyance source is fixed, the turn bar 9 is moved up and down to center according to the width of the film 2.
[0072]
  The dancer roller 12 shown in FIGS. 1 and 3 detects the tension of the film 2 as follows. The film 2 is conveyed at a speed controlled by a pull-down belt 19 of the bag making and packaging unit 300 described later.
[0073]
  When the tension of the film 2 fluctuates, the position of the dancer roller 12 biased 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 according to the pulling force of the spring, that is, the film. 2 tension is detected. The above-described motor 6 that feeds the film 2 is controlled based on this detected tension. That is, when the tension increases, the rotational speed of the motor 6 increases. When the tension decreases, the rotational speed of the motor 6 decreases and feedback control is performed to return the dancer roller 12 to the reference position.
[0074]
  The film 2 passing through the dancer roller 12 is guided in the horizontal direction by a plurality of roll bars 11 extending in the horizontal direction, and as shown in FIG. 3, the upper part of the bag making and packaging machine 1000 is placed on the back surface of the film 2 (the inside of the bag). The sheet is conveyed in the direction of arrow C with the surface facing upward, and is guided to the bag making and packaging unit 300.
[0075]
  FIG. 5 is a perspective view showing a detailed configuration of the bag making and packaging unit in FIG. 1.
  In FIG. 5, the bag making and packaging unit 300 includes a former 15, a cylinder 16, a vertical sealing mechanism 18, a pair of pull-down belts 19, a horizontal sealing mechanism 20, and a hopper 22. In the bag making and packaging unit 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 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 superimposed by the vertical sealing mechanism 18. Are welded in the vertical direction.
[0076]
  Further, the product supplied to the hopper 22 from the upper product supply unit (not shown) passes through the inside of the cylinder 16 and is filled into the film 2 formed into a cylindrical shape. The film 2 filled with the product is welded in the horizontal direction by the horizontal sealing mechanism 20 and the sealing surface thereof is cut in the horizontal direction to produce a bag 21 filled with the product.
[0077]
  FIG. 6 is a side view showing a detailed configuration of the film squeezing device in the bag making and packaging machine of FIG. 3. 7-11 is a schematic sectional drawing which shows the 1st-5th process of the film squeezing apparatus at the time of replacement | exchange of a film roll. FIG. 12 is an enlarged view of a portion X in FIG.
[0078]
  Furthermore, FIGS. 13-14 is a schematic block diagram which shows the structure of the other form example of the film storage mechanism in this invention.
[0079]
  As shown in FIGS. 6 and 7, the film bonding apparatus 102 includes a film pressing mechanism 60 that presses and fixes the film, a film suction mechanism 70 that sucks and holds the film 2, and a film storage mechanism 80 when the films are bonded. Have.
[0080]
  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 rotation shaft 29, and a guide roller 30.
[0081]
  The three fixed rollers 25, the two movable rollers 26, the rotation shaft 29, and the guide roller 30 are arranged in the vertical direction so as to be orthogonal to the traveling direction of the film 2 and arranged in parallel to each other. Yes. The pair of fixed frames 27 are arranged in parallel to the traveling direction of the film 2 and at a predetermined interval. The pair of fixed frames 27 are fixed to the main body frame 600.
[0082]
  The pair of movable frames 28 are also arranged in parallel to the traveling direction of the film 2 and at a predetermined interval. The pair of movable frames 28 are pivotally supported with respect to the pair of fixed frames 27 by a rotation shaft 29.
[0083]
  Both ends of the three fixed rollers 25 and the guide roller 30 are pivotally supported by a pair of fixed frames 27 so that each can rotate. Both ends of the two movable rollers 26 are pivotally supported by a pair of movable frames 28, and each can rotate with respect to the movable frame 28. Further, the two movable rollers 26 can swing around a rotation shaft 29 together with a pair of movable frames 28.
[0084]
  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. Then, the direction is changed by the outer surface of the third fixed roller 25 and then guided to the film transport unit 200.
[0085]
  The process in the case where the film 2 is drawn 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 FIG. 8 to FIG. 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. 2b is attached to the film of the film roll 1 after the replacement.
[0086]
  As shown in FIG. 7 during bag making 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 bonding apparatus 102. The film is transported to the film transport unit 200. At this time, the film pressing mechanism 60 and the film suction mechanism 70 are not operated.
[0087]
  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 bonding apparatus 102 by the film pressing mechanism 60, and the film 2a is sucked and held by the film suction mechanism 70. . Further, the film 2a is cut at the end as shown by the arrow D, and the film 2a and the roll core 31 of the film roll 1 are divided.
[0088]
  Next, as shown in FIG. 9, the pair of movable frames 28 are 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. 26 is separated from the three fixed rollers 25. At this time, since the film 2 a is fixed by the film pressing mechanism 60, the portion of the film 2 a on the upstream side of the film pressing mechanism 60 is moved toward the film bonding 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.
[0089]
  In this case, since the film 2a is fixed by the film pressing 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 resumed, the film 2a can be smoothly conveyed.
[0090]
  In addition, since the entire width of the film 2a is sucked by the film suction mechanism 70, when the film storage mechanism 80 draws the film 2a, the film is kept in a state in which the film tension is maintained while preventing the film from meandering. Thus, the end of the film 2a can be prevented from being drawn into the film storage mechanism 80.
[0091]
  Next, the support shaft 3 in 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 extracted from the support shaft 3.
[0092]
  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 in the bag making and packaging machine 1000. Rotate in a direction perpendicular to the surface E and fix.
[0093]
  After raising the new film roll 1, as shown in FIGS. 10 and 12, the film 2 b wound around the new film roll 1 is pulled out to the film suction mechanism 70 and is sucked by the film suction mechanism 70. The end of 2a is overlapped, and the end of film 2a and the end of film 2b are joined using adhesive tape 24 of FIG. Thereafter, as shown in FIG. 11, the film pressing mechanism 60 and the film suction mechanism 70 are released.
[0094]
  Thus, after joining the film 2a and the film 2b, the support shaft 3 and the roll stopper 4 are rotated again by the motor 6, the film is pulled out in the direction of the arrow Y, and bag-making packaging is resumed. At this time, the film 2b joined to the film 2a is conveyed, and the pair of movable frames 28 move in the direction of the arrow G together with the movable roller 26 by the tension of the film 2b pulled by the film 2a.
[0095]
  As described above, when replacing the film roll 1, the film 2 a of the film roll 1 before replacement is fixed by the film pressing mechanism 60 and sucked by the film suction mechanism 70, and the end of the film 2 a is filmed by the film storage mechanism 80. The suction mechanism 70 can be crushed.
[0096]
  Thereby, the end of the film 2 a sucked by the film suction mechanism 70 and the tip of the film 2 b of the exchanged film roll 1 can be easily joined using the adhesive tape 24.
[0097]
  As a result, the film 2a of the film roll 1 before replacement can be used without remaining to the end, and loss of the film can be eliminated. In addition, since there is no film to be disposed of as an unnecessary object, it is possible to reduce waste.
[0098]
  Furthermore, since the end of the film 2a and the end of the film 2b can be joined while the film 2a is fixed by the film pressing mechanism 60 and the film suction mechanism 70, the film 2a and the film 2b can be easily and reliably not slackened. It becomes possible to join to.
[0099]
  In this embodiment, the film 2 is bonded using the adhesive tape 24, but the film 2 can also be bonded by thermal 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 heat-sealed in the width direction.
[0100]
  Further, in this embodiment, the two movable rollers 26 are moved relative to the three fixed rollers 25 in the direction of the arrow H, so that the film is squeezed, but as shown in FIG. It is also possible to move one movable roller 26 closer by moving it relative to the two fixed rollers 25.
[0101]
  However, as shown in the present embodiment, by moving the two movable rollers 26 relative to the three fixed rollers 25, the movement distance of each of the two movable rollers 26 is kept short. Therefore, it is preferable to provide a plurality of fixed rollers 25 and a movable roller 26 and to move the plurality of movable rollers 26 relative to the plurality of fixed rollers 25.
[0102]
  Furthermore, as shown in FIG. 14, it is possible to provide a suction mechanism between the two fixed rollers 25 for guiding the film, and draw the film in the direction indicated by the arrow I by the suction mechanism so that the film can be drawn. .
[0103]
  15A, the film 2 passing between the three fixed rollers 25 and the two movable rollers 26 is moved in parallel in the direction indicated by the arrow J. Accordingly, the film 2 can be crushed as shown in FIG.
[0104]
  In the present embodiment, the case where the present invention is applied to a vertical pillow packaging machine that makes a bag while moving the film in the vertical direction has been described. However, the present invention is manufactured while moving the film in the horizontal direction. The present invention can be similarly applied to a horizontal pillow packaging machine for carrying out a bag.
[0105]
  In the bag making and packaging machine 1000 of the present embodiment, when the film 2 is unwound to the final end, as shown in FIG. 8, the film 2 can no longer be unwound, so the entire apparatus must be stopped. However, even if the product supply operation 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 products 23 are not packaged, they must be collected as unpackaged products.
[0106]
  Therefore, in the bag making and packaging machine 1000 of the present embodiment, a method of packaging using a film stored in the dancer roller 12 in FIG. The method of packaging using the film stored in the film storage mechanism 80 of the film bonding apparatus 102 can be used.
[0107]
  Hereinafter, after describing the control system of the bag making and packaging machine 1000 of the present embodiment, the control when packaging the product using the film 2 stored in the dancer roller 12 when the film roll 1 is replaced, and the replacement of the film roll 1. The control in packaging goods using the film 2 stored by the film storage mechanism 80 at times is demonstrated in order.
[0108]
  FIG. 16 is a block diagram showing a control system of the bag making and packaging machine 1000 of the present embodiment. In FIG. 16, the product supply unit 700 is disposed on the top of the bag making and packaging unit 300 of FIG. 1, and supplies a certain 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 products to the bag making and packaging unit 300.
[0109]
  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 deviation amount of the dancer roller 12 from the reference position. This deviation amount corresponds to the tension of the film 2.
[0110]
  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 is constant. Moreover, the control apparatus 500 controls operation | movement of the goods supply part 700, the bag making packaging part 300, the film pressing mechanism 60, and the film suction mechanism 70 so that it may demonstrate below.
[0111]
  First, the operation of each part when packaging a product using the film 2 stored in the dancer roller 12 when the film roll 1 is replaced will be described.
[0112]
  FIGS. 17 and 18 are flowcharts showing the operation of the control device 500 when packaging 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.
[0113]
  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.
[0114]
  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 an arrow H in accordance with the tension of the film 2 as shown in FIG. 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.
[0115]
  The control device 500 determines whether or not the film 2 is 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, the control device 500 determines that the film 2 has been drawn to the end when the output value of the load cell 210 exceeds a predetermined value.
[0116]
  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 as the tension of the film 2 increases. To rise. Thereby, the output value of the load cell 210 exceeds a predetermined value.
[0117]
  When the film 2 is pulled out to the end, the control device 500 stops the product supply unit 700 and the motor 6 (step S3). Thereby, supply of the goods from the goods supply part 700 to the bag making packaging part 300 stops. At this point, some products 23 have already been released from the product supply unit 700 into the air.
[0118]
  The control device 500 operates the film pressing mechanism 60 of the film bonding apparatus 102 (step S4). In addition, the control device 500 operates the film suction mechanism 70 of the film bonding apparatus 102 (step S5).
[0119]
  At this time, the operation of the bag making and packaging unit 300 is continued. That is, the vertical sealing mechanism 18, the pull-down belt 19, and the horizontal sealing mechanism 20 of FIG. 5 are operating. Thereby, the film 2 stored in the dancer roller 12 is conveyed to the bag making and packaging unit 300 by the pull-down belt 19.
[0120]
  As shown in FIG. 19 (c), the dancer roller 12 rises so as to pass the position between the roll bars 11 against the elastic force of the tension spring 220, whereby the film 2 stored in the dancer roller 12 is made into a bag. It is sent out to the packaging unit 300. Thereby, in the bag making and packaging unit 300, the product 23 that has already been released into the air from the product supply unit 700 is packaged.
[0121]
  The control device 500 determines whether or not each product on the way of dropping has been packaged (step S6). The number of products in the process of dropping is determined by the distance from the product supply unit 700 to the lateral seal mechanism 20 and the operation speed. For example, when driving at a speed of 200 times per minute, two are in the process of 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 as to be sufficiently covered by the film 2 stored in the dancer roller 12. 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 for the product is completed. Until the count value reaches zero, the packaging operation is maintained. When the count value becomes zero, it is determined that all of the falling products are packaged, and the operation of the bag making and packaging unit 300 is stopped (step S7).
[0122]
  On the other hand, the operator can perform replacement work of the film roll 1 shown in FIGS. 7 to 11 using the film bonding apparatus 102 at the end of step S5. When the bonding of the film 2 shown in FIG. 10 is completed, the operator notifies the control device 500 of the completion of the bonding of the film 2 using an operation switch (not shown) or the like.
[0123]
  When the control device 500 confirms the end of the bonding of the film 2 (step S8), the control device 500 releases the film pressing mechanism 60 of the film bonding device 102 (step S9). Further, the control device 500 releases the film suction mechanism 70 of the film bonding apparatus 102 (step S10). Thereby, it is possible to restart the operation using the film roll 1 after replacement.
[0124]
  The operator instructs the control device 500 to resume operation using an operation switch (not shown) or the like. The control device 500 determines whether or not the operation is possible (step S11). If the operation is possible, the control device 500 returns to step S1 and performs the normal operation.
[0125]
  In this way, the product 23 in the process of dropping when the final end of the film 2 is detected can be packaged using the film 2 stored in the dancer roller 12.
[0126]
  Next, the operation of each part in the case of packaging a product in the process of dropping using the film 2 stored in the film storage mechanism 80 of the film bonding apparatus 102 will be described.
[0127]
  FIG. 20 and FIG. 21 are flowcharts showing the operation of the control device 500 when packaging a product using the film 2 stored in the film storage mechanism 80 of the film bonding apparatus 102. 22 to 26 are schematic cross-sectional views illustrating 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. 22 to 26, reference numeral 2a is given to the film of the film roll 1 before replacement, and reference numeral 2b is attached to the film of the film roll 1 after replacement.
[0128]
  In this example, as shown in FIG. 22, the film pressing mechanism 60 is provided at the position of the upstream fixed roller 25. A load cell 210 is connected to the 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 deviation amount corresponds to the tension of the film 2. The control device 500 in 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 is constant.
[0129]
  In this example, since the film storage mechanism 80 also functions as a dancer roller, the dancer roller 12 of FIG. 1 is not necessary. In this example, the film roll 1 is supported so that the roll core 31 extends in the horizontal direction, and the film bonding apparatus 102 is arranged 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. As a result, 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 up / down mechanism 10 shown in FIG.
[0130]
  During normal operation (step S21), the control device 500 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 becomes constant as described above.
[0131]
  As shown in FIG. 22, when stopped, the movable frame 28 is positioned at the lowermost end due to its own weight and downward biasing by the tension spring 220. During normal operation, as shown in FIG. 22, the movable frame 28 swings up and down as shown by the arrow h in accordance with the tension of the film 2a. 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 2 a is stored by the film storage mechanism 80.
[0132]
  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, the control device 500 determines that the film 2a has been drawn to the end when the output value of the load cell 210 exceeds a predetermined value.
[0133]
  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). Thereby, supply of the goods from the goods supply part 700 to the bag making packaging part 300 stops. However, at this time, some products 23 have already been released from the product supply unit 700 and are in the process of falling.
[0134]
  Next, the control device 500 operates the film pressing mechanism 60 of the film bonding apparatus 102 (step S24).
[0135]
  At this time, the operation of the bag making and packaging unit 300 does not stop, but the vertical sealing mechanism 18, the pull-down belt 19 and the horizontal sealing mechanism 20 of FIG. 5 operate, and the film 2 stored in the film storage mechanism 80 is pulled down. 19 to the bag making and packaging unit 300.
[0136]
  At this time, as shown in FIG. 24, the movable frame 28 provided with the movable roller 26 rotates further about the rotation shaft 29 against the elastic force of the tension spring 220, thereby causing the film storage mechanism 80 to move. The stored film 2a is sent out to the bag making and packaging unit 300 as indicated by an arrow z. Using this film, the bag making and packaging unit 300 wraps each product 23 that is in the process of dropping.
[0137]
  As described above, the control device 500 determines whether or not each product on the way of dropping is packaged while subtracting the number of times the product has been released (step S25).
[0138]
  When all the falling products are packaged, the control device 500 stops the operation of the bag making and packaging unit 300 (step S26), and then activates the film suction mechanism 70 of the film bonding apparatus 102 (step S27). . As shown in FIG. 24, the worker cuts the film 2 a at the end position indicated by the arrow D, and divides the film 2 a and the roll core 31.
[0139]
  The control device 500 releases the film pressing mechanism 60 of the film bonding apparatus 102 (step S28). Accordingly, as shown in FIG. 25, the movable roller 26 and the movable frame 28 rotate downward about the rotation shaft 29 as indicated by an arrow F by the own weight and the elastic force of the tension spring 220. Thereby, the movable roller 26 is separated downward from the fixed roller 25, and the film 2 a on the upstream side of the film bonding apparatus 102 is drawn to the film bonding apparatus 102 and stored in the film storage mechanism 80. As a result, the end of the cut film 2 a is guided to the film suction mechanism 70.
[0140]
  As shown in FIG. 26, the operator attaches the new film roll 1 to the support shaft, and then pulls out the leading end of the film 2 b of the new film roll 1 to the film suction mechanism 70 to suck the film sucked by the film suction mechanism 70. The end of 2a is overlapped, and the end of film 2a and the end of film 2b are joined.
[0141]
  When the bonding of the film 2 is completed, the operator notifies the controller 500 of the completion of the bonding of the films 2a and 2b using an operation switch (not shown) or the like.
[0142]
  When the control device 500 confirms the end of the bonding of the film 2 (step S29), the control device 500 releases the film suction mechanism 70 of the film bonding device 102 (step S30). Thereby, the driving | operation restart by the film roll 1 after replacement | exchange is attained.
[0143]
  An operator operates an 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 control device 500 returns to step S21 and performs the normal operation.
[0144]
  In this way, the product 23 in the process of dropping when the end of the film 2 is detected can be packaged using the film 2 a stored in the film storage mechanism 80.
[0145]
  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 bonding apparatus 102 corresponds to a film bonding apparatus. The film storage mechanism 80 or the dancer roller 12 corresponds to the film storage mechanism. Furthermore, the film suction mechanism 70 corresponds to a film suction holding mechanism, and the film pressing mechanism 60 corresponds to a film fixing and holding mechanism. 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.
[0146]
  In this embodiment, as shown in FIG. 24, a mechanism for holding the movable roller 26 in a state where it protrudes above the fixed roller 25 is added, so that the film is mounted between the rollers 26 and 26. When doing so, it is only necessary to insert a film between the roller 26 and the roller 25, so that there is an advantage that the workability is better than the conventional one.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing the 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 side.
FIG. 3 is a schematic plan view showing the 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 the film conveyance path in FIG.
FIG. 5 is a perspective view showing a configuration of the bag making and packaging unit in FIG. 1.
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. 3.
FIG. 7 is a schematic cross-sectional view showing the first step when the film roll is replaced.
FIG. 8 is a schematic cross-sectional view showing the second step when the film roll is replaced.
FIG. 9 is a schematic cross-sectional view showing a third step when the film roll is replaced.
FIG. 10 is a schematic cross-sectional view showing a fourth step when the film roll is replaced.
FIG. 11 is a schematic cross-sectional view showing a fifth step when the film roll is replaced.
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 packaging a product using the film stored in the dancer roller when the film roll is replaced.
FIG. 18 is a flowchart showing the operation of the control apparatus when packaging a product using the film stored in the dancer roller when the film roll is replaced.
FIG. 19 is a schematic diagram illustrating the operation of the dancer roller during normal operation and when the film roll is replaced.
FIG. 20 is a flowchart illustrating the operation of the control device when packaging a product using the film stored in the film storage mechanism of the film bonding apparatus when the film roll is replaced.
FIG. 21 is a flowchart showing the operation of the control device when packaging a product using the film stored in the film storage mechanism of the film bonding apparatus when the film roll is replaced.
FIG. 22 is a schematic cross-sectional view showing the operation of the film storage mechanism of the film bonding apparatus during normal operation and film roll replacement.
FIG. 23 is a schematic cross-sectional view showing the operation of the film storage mechanism of the film bonding apparatus during normal operation and film roll replacement.
FIG. 24 is a schematic cross-sectional view showing the operation of the film storage mechanism of the film bonding apparatus during normal operation and film roll replacement.
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 during film roll replacement.
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 film roll replacement.

Claims (10)

A bag making and packaging machine that wraps a product while making a bag using a film roll in which a long film is wound into a roll,
A film roll support for supporting the film roll;
A film transport mechanism for transporting a film fed from the film roll;
Provided between the film roll support part and the film transport mechanism, and for joining the film end on the film transport mechanism side and the film tip of the replaced film roll at the film joining position when the film roll is replaced. A film bonding apparatus ,
A bag making and packaging unit for packaging products while making bags;
A product supply unit for supplying products to the bag making and packaging unit;
A driving device for sending out the film from the film roll supported by the film roll support;
A detector for detecting that the film of the film roll has been consumed to the end;
A control unit for controlling the operation of the bag making and packaging unit, the product supply unit, and the driving device;
The film bonding apparatus includes a film storage mechanism for storing the film by scrambling the film on the upstream side from the film bonding position after the film is separated from the film roll before replacement .
When the film is stored in the bag making and packaging unit, the film storage mechanism sends out the film transported by the film transport mechanism,
The control unit stops the operation of the commodity supply unit and the driving device in response to the output of the detector, and after the film stored in the film storage mechanism is fed out for a predetermined bag, the bag making and packaging unit Stop the operation of
The film storage mechanism, after the operation of the bag making and packaging unit is stopped, squeezes the film upstream from the film bonding position after the film is separated from the film roll before replacement, and stores the film. Machine. The detector includes a tension detector that detects the tension of the film;
Wherein the control unit is configured to stop the operation of the product feed unit and the drive device, the bag making and packaging machine according to claim 1 when the output of the tension detector exceeds a predetermined value. The bag making and packaging machine according to claim 2 , 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. The said film storage mechanism is a bag making packaging machine in any one of Claims 1-3 provided in the downstream rather than the film joining position of the said film joining apparatus. The film storage mechanism is
A fixed roller for guiding the conveyed film;
A movable roller that changes the travel distance of the film being conveyed;
The bag making packaging machine according to any one of claims 1 to 4 , further comprising a moving mechanism that moves the movable roller toward and away from the fixed roller. The moving mechanism is
A fixed frame that supports both ends of the fixed roller;
A movable frame that supports both ends of the movable roller;
A rotation shaft that is arranged in parallel to the fixed roller and that rotatably supports one end of the movable frame with respect to the fixed frame;
6. The bag making and packaging machine according to claim 5 , wherein the movable roller moves relative to the fixed roller by rotating the movable frame with respect to the fixed frame about the rotation axis. The film bonding apparatus is
Disposed upstream from the film storage mechanism in the film conveyance direction, further comprising a film suction retaining mechanism for sucking and holding the detached from the exchange before the film roll film during film bonding, according to claim 1 Bag making and packaging machine. The bag making and packaging machine according to claim 7 , wherein the control unit operates the film suction and holding mechanism during a film bonding operation. The film bonding apparatus is
The bag making and packaging machine according to any one of claims 1 to 8 , further comprising 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 upstream side of the film storage mechanism. The bag making and packaging machine according to claim 9 , wherein the control unit operates the film fixing and holding mechanism in response to an output of the detector.

Images