JP5612358B2 - Packaging bag feeder - Google Patents

Description

  The present invention relates to a packaging bag supply device that supplies a packaging bag to a packaging machine, and in particular, separates the packaging bag sheet that is supplied in a state where the packaging bags are continuously connected and wound in a roll shape, for each packaging bag. The present invention relates to a packaging bag supply device that sequentially supplies a packaging machine.

  2. Description of the Related Art Conventionally, there has been provided a packaging bag supply device that sequentially supplies packaging bags to a packaging machine that packs products such as paper diapers and sanitary napkins manufactured by a manufacturing machine in a predetermined number of units. Such a packaging bag supply apparatus cuts the packaging bag sheet supplied in a state where the packaging bags are continuously connected and wound in a roll shape, and sequentially supplies the packaging bags to the packaging machine.

  By the way, since the packaging bag sheet supplied in the state wound by roll shape has a finite length, it is necessary to replace | exchange for a new roll when a roll cuts. However, if the supply of the packaging bag to the packaging machine is stopped, the entire system is stopped. Therefore, it is necessary not to stop the supply of the packaging bag even at the time of roll replacement.

  Therefore, in the conventional packaging bag supply device, two rolls of the packaging bag sheet are set in advance, and when one roll breaks, the other roll is wrapped at the end of the packaging bag sheet that has been broken by a human hand. The packaging bag sheet is continuously supplied by connecting two packaging bag sheets by sticking the starting end of the bag sheet with a tape or the like.

  However, in order to manually connect the packaging bags, it is necessary for the operator to always stick to the device, and if the roll break is missed due to human error, the entire system will be stopped. There were a lot of things.

  On the other hand, in order to continuously supply a single-layer sheet wound in a roll shape that is not a packaging bag sheet, an apparatus for automatically connecting two sheets is disclosed in, for example, Patent Document 1 below. Yes.

JP 2005-298162 A

  However, the conventional device for automatically joining and joining two sheets is simply a method of joining the start and end of a single-layer sheet by tape sticking or heat-sealing sealing. It is difficult to apply as it is to the packaging bag sheet.

  For example, there are many cases in which characters and designs are printed on the outer surface of the packaging bag. In such a case, the printing paint is melted by the heat-sealing seal, or a printing coating process is applied. For this reason, heat welding becomes insufficient, and the supply of the packaging bag may be stopped.

  SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and the packaging bag sheets that are supplied in a state where the packaging bags are continuously connected and wound in a roll shape are cut into packaging bags and sequentially wrapped. An object of the present invention is to automatically and reliably switch the packaging bag sheet without stopping the supply of the packaging bag when the roll is cut.

In order to solve the above-mentioned problems, a packaging bag supply device according to the present invention is a packaging bag supply device for cutting a packaging bag sheet in which packaging bags are continuously connected and sequentially supplying each packaging bag to a packaging machine. In the first packaging bag sheet supply line for supplying the first packaging bag sheet from the first roll, the first roll break detector for detecting that the first roll is broken, and the first packaging A first packaging bag sheet supply line having a first camera for photographing the surface of the bag sheet, and a second packaging bag sheet supply line for supplying a second packaging bag sheet from a second roll, wherein the second roll comprises: A second roll bag detector for detecting that the roll has been cut, a second packaging bag sheet supply line having a second camera for photographing the surface of the second packaging bag sheet, the first packaging bag sheet, and the Second packaging bag A joining device for joining the first packaging bag sheet and the second packaging bag sheet in a partially overlapped state in order to continuously supply the packaging bag sheets alternately connected to the downstream side, A packaging bag sheet conveying line that conveys the connected packaging bag sheet downstream of the joint, and a packaging bag separating unit that separates the connected packaging bag sheet sent from the packaging bag sheet conveying line into each packaging bag; The first registration image photographed by the first camera in a state where the joining region of the first packaging bag sheet is located at the joining device and the joining region of the second packaging bag sheet are located at the joining device. wherein a memory is recorded a second registration image taken by the second camera, the first roll from the output of the first roll breakage detector and the second roll breakage detector or the second row in a state When it is detected that has expired, on the basis of the captured image of the first camera or the second camera, the captured image of the first camera or the second camera coincides with the first registered image or the second registration image The first packaging bag sheet or the second packaging bag sheet is conveyed until the cut first packaging bag sheet or the second packaging bag sheet is conveyed to a fixed position for joining, Control means for controlling the sheet and the second packaging bag sheet to be joined by the joining device, and switching of the packaging bag sheet is performed automatically.

  According to the present invention, in the packaging bag supply device, the packaging bag sheets supplied in a state where the packaging bags are continuously connected and wound in a roll shape are separated into the packaging bags and sequentially supplied to the packaging machine. In this case, it is possible to automatically and reliably switch the packaging bag sheet without stopping the supply of the packaging bag.

Drawing 1 is a mimetic diagram showing roughly the composition of the packaging bag supply device concerning the embodiment of the present invention. FIG. 2 is a diagram for explaining a registered image recorded in the memory according to the present embodiment. FIG. 3 is a flowchart showing a flow of processing when the rolls according to the present embodiment are switched.

  Hereinafter, a packaging bag supply device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram schematically showing the configuration of the packaging bag supply device according to the present embodiment. As shown in the figure, the packaging bag supply device 1 includes a first packaging bag sheet supply line 10 for supplying the first packaging bag sheet 5 and a second packaging bag sheet supply line 20 for supplying the second packaging bag sheet 7. And the first packaging bag sheet 5 or the second packaging bag sheet 7, and a joining device 30 for forming the joined packaging bag sheet 9, and the joined packaging bag sheet 9 downstream of the joining device 30. A packaging bag sheet conveying line 40 conveyed on the side, a packaging bag separating section 50 for cutting the packaging bag sheet 9 conveyed from the packaging bag sheet conveying line 40 into individual packaging bags, and a packaging bag supply device The control apparatus 60 for controlling 1 operation | movement is provided.

  The packaging bag sheets 5 and 7 according to the present embodiment are sheets in which film packaging bags for packaging products such as disposable diapers, sanitary napkins, and pet sheets in a predetermined number unit are continuously connected. Supplied as rolls 6 and 8 wound in a roll. The packaging bag supply apparatus 1 cuts and divides the packaging bag sheets 5 and 7 at the boundary portion between adjacent packaging bags, and sequentially supplies each packaging bag to the packaging machine.

  The first packaging bag sheet supply line 10 detects that the first roll hanger 11 that supports the first roll 6 wound with the first packaging bag sheet 5 in a roll shape and the first roll 6 is cut. The first end sensor 12, a plurality of rollers including a first drive roller 13 for supporting and conveying the first packaging bag sheet 5, one outer surface of the first packaging bag sheet 5 positioned in front of the joining device 30 (see FIG. A first camera 15 for photographing the middle upper surface) and a first sheet cutter 16 for cutting the first packaging bag sheet 5 are provided.

  The first end sensor 12 as a roll break detector optically detects the presence or absence of the first packaging bag sheet 5 at the position where the photoelectric sensor is installed, so that all the first rolls 6 are unwound. Can be detected. The first camera 15 is movably installed on the rail 18 and is movable in the transport direction (lateral direction in the figure) of the first packaging bag sheet 5.

  The second packaging bag sheet supply line 20 detects that the second roll hanger 21 supporting the second roll 8 wound with the second packaging bag sheet 7 in a roll shape and the second roll 8 are cut. A second end sensor 22, a plurality of rollers including a second drive roller 23 for supporting and conveying the second packaging bag sheet 7, one outer surface of the second packaging bag sheet 7 positioned in front of the joining device 30 (see FIG. A second camera 25 for photographing the middle upper surface) and a second sheet cutter 26 for cutting the second packaging bag sheet 7 are provided.

  The second end sensor 22 as a roll break detector optically detects the presence or absence of the second packaging bag sheet 7 at the position where the photoelectric sensor is installed, so that the second roll 8 is completely unwound. Can be detected. The second camera 25 is movably installed on the rail 28 and is movable in the transport direction (lateral direction in the figure) of the second packaging bag sheet 7.

  The joining device 30 includes a sealing device 31 that performs heat welding and sealing by sandwiching a portion where the first packaging bag sheet 5 and the second packaging bag sheet 7 overlap from both sides, and the first packaging bag sheet 5 or the second packaging. The packaging bag sheet 5 connected without interruption even when the first roll 6 or the second roll 8 is cut and lost by joining one end portion of the bag sheet 7 and the other starting end portion and connecting them. , 7 can be supplied downstream. The packaging bag sheets 5 and 7 are formed of polyethylene or polypropylene film, and the sealing device 31 joins the first packaging bag sheet 5 and the second packaging bag sheet 7 by heat welding sealing. .

  The packaging bag sheets 5 and 7 have a seal region (joining region) to be heat-sealed and sealed, and the sealing device 31 performs heat-sealing and sealing both in the sealing region of the packaging bag sheets 5 and 7. That is, both the first packaging bag sheet 5 and the second packaging bag sheet 7 are heat-sealed and sealed in a state where the sealing regions of the first packaging bag sheet 5 and the second packaging bag sheet 7 are located at the sealing device 31.

  Here, the sealing area | region of the packaging bag sheets 5 and 7 is a boundary part of the packaging bag connected continuously. In general, characters and designs are printed on the outer surface of the front and back sides of a film packaging bag, and the coating is applied so that the printing does not peel off. Therefore, if this part is heat-welded, it is difficult to heat-weld due to the coating, and it cannot be firmly joined or it takes time to join. In addition, the printing paint may melt and adhere to the sealing device 31, which may lead to malfunction.

  In order to avoid such a problem, in this embodiment, the boundary portion of the packaging bag that is not printed or coated is used as a seal region. Generally, the boundary part of the packaging bag is a part that is discarded as an extra part after the product is put in the packaging bag in the packaging machine and the bag is heat-sealed and sealed, and is not printed or coated. Suitable for the area.

  Note that the bonding of the packaging bag sheets 5 and 7 is not limited to heat welding, and may be performed by bonding with an adhesive or applying an adhesive tape. However, since the packaging bag sheets 5 and 7 are composed of two-layer films, if only one side facing each other is bonded, there is a possibility that the packaging bag sheets 5 and 7 are displaced during transportation. Therefore, in this embodiment, it is desirable to firmly bond all the layers by thermal welding.

  The packaging bag sheet conveyance line 40 includes a step roller 41 and a plurality of rollers for supporting and conveying the conveyance bag sheet 9, and conveys the packaging bag sheet 9 to the packaging bag separating unit 50. In the step roller 41, a plurality of lower rollers 42, 43 and a plurality of upper rollers 44 are provided with a step, and the transport bag sheet 9 is transported while meandering in a zigzag direction. The lower roller 43 near the center of the step roller 41 is configured to be movable up and down, and can move upward from a fixed position at the same height as the lower roller 42 at both ends.

  In this way, the lower roller 43 moves up and down to change the path length of the packaging bag sheet 9 in the step roller 41, and the supply of the packaging bag sheet 9 from the upstream side of the step roller 41 is stopped. In addition, since the lower roller 43 moves upward to shorten the path length in the step roller 41, the packaging bag sheet 9 can be continuously conveyed to the downstream side.

  The packaging bag cutting unit 50 includes a superposition detection sensor 51, a plurality of rollers including a third drive roller 52 for supporting and transporting the packaging bag sheet 9, a third sheet cutter 53 for separating the packaging bag sheet 9 into each packaging bag, and packaging. A discharge unit 55 for discharging the overlapped portion of the bag sheet 9 and a conveyance belt 54 for conveying the sheet cut out by the third sheet cutter 53 to the packaging machine or the discharge unit 55 are provided.

  The superimposition detection sensor 51 is a sensor that detects the light transmittance of the conveyed packaging bag sheet 9. Since the part overlapped by the joining of the first packaging bag sheet 5 and the second packaging bag sheet 7 in the joining device 30 cannot be supplied as a packaging bag, it must be removed. Since the portion where the sheet is overlapped and the sheet is doubled has a low light transmittance, the overlapping portion can be detected by detecting the light transmittance with the overlap detection sensor 51. Of course, the overlapping portion of the packaging bag sheet 9 may be detected by other methods such as image recognition by photographing with a camera.

  The third sheet cutter 53 cuts the conveyed packaging bag sheet 9 at the boundary portion of each packaging bag. The cut packaging bag is sent to the packaging machine by the transport belt 54. In addition, when the overlap detection sensor 51 recognizes the overlapped portion, the third sheet cutter 53 does not cut the boundary portion between the packaging bag and the next packaging bag, and cuts out the two pieces in a connected state. The packaging bags before and after the cut-out overlapped portion are transported to the discharge portion 55 by the transport belt 54 and discharged.

  The control device 60 is connected to the end sensors 12 and 22, the driving rollers 13, 23 and 52, the cameras 15 and 25, the sheet cutters 16, 26 and 53, the sealing device 31, the step roller 41, the superposition detection sensor 51, and the conveyance belt 54. It is configured to control the operation of these members and to receive output signals from these members.

  The control device 60 also includes a memory 61 that records setting information for each product of the packaging bag sheet to be set. In the setting information for each product, the first and second registrations are images taken by the cameras 15 and 25 when the sealing region of each packaging bag sheet set in the packaging bag supply device 1 is located at the sealing device 31. The image and the first and second shooting positions that are the positions of the cameras 15 and 25 when the registered image is shot are included.

  Here, the setting method of this setting information is demonstrated, referring FIG. 2A and 2B are diagrams for explaining the registered images stored in the memory according to the present embodiment. FIG. 2A shows the first registered image, and FIG. 2B shows the second registered image. Yes.

  The setting information for each product is registered for each packaging bag sheet, and if it is set first, registered setting information can be used for the same product thereafter. When registering, it is necessary to register the setting information both when the packaging bag sheet is installed in the first packaging bag sheet supply line 10 and when it is installed in the second packaging bag sheet supply line 20.

  First, in a state where the packaging bag sheet is set on the first roll hanger 11, the starting end of the sheet is stretched on the line and conveyed to the sealing device 31. Next, fine adjustment is performed so that the sealing region (joining region) of the packaging bag sheet is located just at the sealing device 31. Shooting with the first camera 15 is performed in a state where the sealing area is aligned with the position of the sealing device 31. FIG. 2A shows the top surface (outer surface on the front side) of the packaging bag sheet located at the location photographed by the first camera 15, and the square dotted line shows the region registered as the first registration image. ing.

  The first registered image is preferably a characteristic pattern that can be easily recognized when the image is recognized later. Therefore, at the time of shooting, the first camera 15 is moved on the rail 18, and the first camera 15 is stopped at a position where a characteristic image falls within a square dotted line, and shooting is performed. This captured image is registered in the memory 61 as a first registered image, and the position of the first camera 15 at the time of shooting is registered as the first shooting position.

  Subsequently, the same packaging bag sheet is set on the second roll hanger 21, and the second registered image and the second photographing position are similarly registered. FIG. 2B shows the upper surface (the outer surface on the back side) of the packaging bag sheet located at the location photographed by the second camera 25, and the dotted dotted line shows the area registered as the second registered image. ing. In general, since the design and the like are different between the front side and the back side of the packaging bag, a characteristic portion may be registered as a second registered image in the design of the outer surface of the back side.

  In this way, if the setting information in a state where the sealing area is exactly aligned with the position of the sealing device 31 is registered for each packaging bag sheet, the camera is later placed at the photographing position for the same packaging bag sheet. If the camera-captured images are monitored with the positions 15 and 25 positioned, and the conveyance of the packaging bag sheet is stopped when the photographed image matches the registered image, the sealing area of each packaging bag sheet is determined by the position of the sealing device 31. Can be adjusted automatically.

  Although the configuration of the packaging bag supply device 1 has been described in detail above, the processing flow when the rolls are switched in the packaging bag supply device 1 will be described. FIG. 3 is a flowchart showing a flow of processing when the rolls according to the present embodiment are switched. Here, the flow when the second roll 8 is cut and switched to the first roll 6 will be described. In addition, when the 1st roll 6 is set, the 1st packaging bag sheet 5 shall be previously set to the fixed position for joining located in the place of the sealing device 31. FIG. The operation of each member is realized by the control device 60 executing various control programs recorded in the memory 61.

  First, when all the second packaging bag sheets 7 wound around the second roll 8 are unwound, the control device 60 detects that the second roll 8 is cut from the detection signal of the second end sensor 22 in S11. To do. In S12, the control device 60 that has detected the roll breakage conveys the second packaging bag sheet 7 to the fixed position for joining based on the captured image of the second camera 25.

  Specifically, in S12, the control device 60 first sends a control signal to the second drive roller 23 so as to drive at low speed. In parallel, the control device 60 moves the second camera 25 to the second shooting position when the second camera 25 is not in the second shooting position. Thereafter, the control device 60 starts monitoring whether or not the image taken by the second camera 25 of the second packaging bag sheet 7 conveyed at low speed matches the second registered image.

  When the control device 60 determines that the captured image of the second camera 25 matches the second registered image, the sealing area of the second packaging bag sheet 7 has been transported to the sealing device 31, that is, to the fixed position for joining. Therefore, the driving of the second driving roller 23 is stopped.

  On the other hand, even if the driving of the second driving roller 23 becomes low speed or stops, the driving roller 52 is driven as usual, and therefore the lower roller 43 of the step roller 41 starts to rise in S13. Normally, when the rise of the lower roller 43 is detected, the control device 60 starts driving the drive rollers 13 and 23, but is set not to start driving during the roll switching operation. As a result, even when the second packaging bag sheet 7 is conveyed at a low speed or the supply of the conveying bag sheets 5 and 7 is stopped, the subsequent packaging bag separating unit 50 is fed at a normal speed. It becomes possible to continue supplying the packaging bag sheet 9.

  In S12, when the second packaging bag sheet 7 is conveyed to the fixed position for joining, the sealing regions of both the first packaging bag sheet 5 and the second packaging bag sheet 7 are located at the sealing device 31. . Therefore, it progresses to S14, the sealing apparatus 31 is driven by control of the control apparatus 60, and the 1st packaging bag sheet 5 and the 2nd packaging bag sheet 7 are heat-welded-sealed in a seal | sticker area | region, and are connected. In S14, the 2nd packaging bag sheet 7 is cut by the 2nd sheet cutter 26 simultaneously with joining, and a surplus part is cut off.

  Subsequently, in S15, the drive of the drive roller 13 is started under the control of the control device 60, and the normal conveyance of the first packaging bag sheet 5 is started. When the conveyance of the first packaging bag sheet 5 is started, the lower roller 43 of the step roller 41 starts to descend and returns to a fixed position.

  When normal conveyance is resumed in S <b> 15, the joint portion between the first packaging bag sheet 5 and the second packaging bag sheet 7 is conveyed to the packaging bag separating unit 50. At this joined portion, the end portion of the second packaging bag sheet 7 and the starting end portion of the first packaging bag sheet 5 overlap each other, so that it is necessary to discharge the joined portion without supplying it to the packaging machine.

  In S <b> 16, when the control device 60 detects that the joining portion (superimposed portion) has been conveyed from the detection signal of the superimposition detection sensor 51, the process proceeds to S <b> 17 and the control device 60 performs the third drive roller 52 and the third sheet cutter 53. In addition, the conveyance belt 54 is controlled so that the joining portion is discharged to the discharge portion 55.

  While the roll switching process in the packaging bag supply device 1 has been described above, the procedure for newly setting a new second roll 8 in the packaging bag supply device 1 will be described.

  First, a new second roll 8 is set on the second roll hanger 21, and the leading end of the sheet is extended on the line and brought to the front of the sealing device 31. Subsequently, when the operator issues a “packaging bag sheet set” command to the control device 60, the control device 60 moves the second camera 25 to the second photographing position, and the photographed image by the second camera 25 is the first. The second driving roller 23 is driven at a low speed while monitoring whether or not the two registered images match, and the second packaging bag sheet 7 is conveyed.

  After that, if the control device 60 determines that the captured image matches the second registered image and stops the second drive roller 23, the seal region of the second packaging bag sheet 7 matches the position of the seal device 31. And the setting of the second roll 8 is completed. And if the 1st roll 6 in supply is lost, like the above, the control apparatus 60 will automatically change from the 1st roll 6 (1st packaging bag sheet 5) to the 2nd roll 8 (2nd packaging bag sheet 7). Control to switch to.

  As mentioned above, although this embodiment was described in detail, according to this embodiment, switching of a packaging bag sheet | seat can be performed automatically, without stopping supply of a packaging bag. Also, if the packaging bag sheet is transported while monitoring whether or not the captured image of the camera matches the registered image, and the transportation is stopped when it matches, the sealing area of the packaging bag sheet is positioned exactly at the sealing device. Therefore, the packaging bag sheet can be reliably joined. Moreover, in this embodiment, the registration image and the setting information of the photographing position are recorded for each product, and even when the packaging bag sheet is replaced with another product, the joining can be surely performed.

  Moreover, in this embodiment, since it has comprised so that a junction part which a packaging bag sheet | seat overlaps and cannot be used as a packaging bag will be detected by a superimposition detection sensor, and it discharges | emits automatically, it goes through a human hand It is possible to switch the packaging bag sheet fully automatically.

  In the present embodiment, the outer surface on the front side of the packaging bag sheet is set as a registered image in the first camera in the first packaging bag sheet supply line, and the packaging bag sheet in the second camera in the second packaging bag sheet supply line. The outer surface of the back side is set separately as a registered image. Therefore, even if it is a packaging bag sheet | seat from which a design differs in front and back, a joining area | region can be match | combined reliably.

  The embodiment of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. For example, in the above embodiment, a photoelectric sensor is used as the roll break detector, but roll break may be detected by image recognition using a CCD camera.

DESCRIPTION OF SYMBOLS 1 Packaging bag supply apparatus 5,7,9 Packaging bag sheet 6,8 roll 10 1st packaging bag sheet supply line 11,21 Roll hanger 12,22 End sensor 13,23,52 Drive roller 15,25 Camera 16,26, 53 Sheet Cutter 18, 28 Rail 20 Second Packaging Bag Sheet Supply Line 30 Joining Device 31 Sealing Device 40 Packaging Bag Sheet Conveying Line 41 Step Roller 50 Packaging Bag Dividing Unit 51 Superposition Detection Sensor 54 Conveying Belt 55 Discharging Unit 60 Control Device 61 Memory

Claims (2)

In a packaging bag supply device for separating packaging bag sheets in which packaging bags are continuously connected and supplying each packaging bag to a packaging machine in sequence,
A first packaging bag sheet supply line for supplying a first packaging bag sheet from a first roll, a first roll break detector for detecting that the first roll is broken, and the first packaging bag sheet A first packaging bag sheet supply line having a first camera for photographing the surface of
A second packaging bag sheet supply line for supplying a second packaging bag sheet from a second roll, a second roll break detector for detecting that the second roll is broken, and the second packaging bag sheet A second packaging bag sheet supply line having a second camera for photographing the surface of
The first packaging bag sheet and the second packaging bag sheet are partially overlapped in order to continuously supply the packaging bag sheet in which the first packaging bag sheet and the second packaging bag sheet are alternately connected to the downstream side. A joining device for joining in a state in which
A packaging bag sheet conveyance line for conveying the connected packaging bag sheet downstream of the joint; and
A packaging bag separating section that separates the connected packaging bag sheets sent from the packaging bag sheet conveyance line into respective packaging bags;
The first registration image taken by the first camera in a state where the joining region of the first packaging bag sheet is located at the joining device and the joining region of the second packaging bag sheet are located at the joining device. A memory recording a second registered image taken by the second camera in a state;
When it is detected from the outputs of the first roll break detector and the second roll break detector that the first roll or the second roll is broken, based on the photographed image of the first camera or the second camera. The one cut by conveying the first packaging bag sheet or the second packaging bag sheet until the photographed image of the first camera or the second camera matches the first registered image or the second registered image. Control means for transporting the first packaging bag sheet or the second packaging bag sheet to a fixed position for joining and controlling the first packaging bag sheet and the second packaging bag sheet to be joined by the joining device; ,
A packaging bag supply device characterized in that the packaging bag sheet is automatically switched. The first camera and the second camera are installed to be movable in the conveying direction of the first packaging bag sheet and the second packaging bag sheet, and the memory includes the first registration image and the second registration image. Further recording the first shooting position and the second shooting position of the first camera and the second camera when shooting
When the control means detects that the first roll or the second roll is cut, the first camera or the second camera is positioned in the first shooting position or the second shooting position. The packaging bag supply device according to claim 2, wherein the movement of the first camera or the second camera is controlled so as to convey the first packaging bag sheet or the second packaging bag sheet.

Images