EP2614954B1 - Resin bag production equipment - Google Patents

Resin bag production equipment Download PDF

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Publication number
EP2614954B1
EP2614954B1 EP10856932.8A EP10856932A EP2614954B1 EP 2614954 B1 EP2614954 B1 EP 2614954B1 EP 10856932 A EP10856932 A EP 10856932A EP 2614954 B1 EP2614954 B1 EP 2614954B1
Authority
EP
European Patent Office
Prior art keywords
port
bag body
unit
bag
holder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP10856932.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2614954A4 (en
EP2614954A1 (en
Inventor
Yozo Araki
Miyoshi Miwa
Makoto Shimizu
Tsutomu Ohashi
Masaki Taguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Machinery Systems Co Ltd
Original Assignee
Mitsubishi Heavy Industries Mechatronics Systems Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Mechatronics Systems Ltd filed Critical Mitsubishi Heavy Industries Mechatronics Systems Ltd
Publication of EP2614954A1 publication Critical patent/EP2614954A1/en
Publication of EP2614954A4 publication Critical patent/EP2614954A4/en
Application granted granted Critical
Publication of EP2614954B1 publication Critical patent/EP2614954B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B3/02—Machines characterised by the incorporation of means for making the containers or receptacles
    • B65B3/022—Making containers by moulding of a thermoplastic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • B65B51/146—Closing bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
    • B65B61/186—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements by applying or incorporating rigid fittings, e.g. discharge spouts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
    • B31B70/844—Applying rigid valves, spouts, or filling tubes

Definitions

  • the present invention relates to an equipment for manufacturing a resin bag used as a container for a fluid such as a drip-feed solution.
  • Resin bags are used as containers for a liquid such as a drip-feed solution.
  • a resin bag is formed of a soft resin film or the like and made up of a bag-shaped bag body having an opening at one side and a tubular port attached to the opening.
  • the tubular port is made of hard resin and serves as a mouth through which a liquid is poured from or into the bag body.
  • Patent Document 1 Conventionally, such a resin bag is made by setting a port between two ribbon-shaped films, welding these two films and at the same time welding the films and port in the opening with the port interposed between the two films (for example, see Patent Document 1).
  • this manufacturing method wrinkles were produced over the films around the welded part between the films and the port, thereby degrading the appearance.
  • the films are drawn and therefore cannot be securely welded, resulting in insufficient sealing strength and, in addition, causing a gap between the films and the port. Therefore, the inventors have suggested in Patent Document 2 that the port is welded to the bag body with its entire perimeter other than the opening being welded.
  • Patent Document 2 represents the closets prior art and discloses the pre-characterizing features of claim 1.
  • a resin bag manufacturing equipment includes a port holder holding a port when the port is inserted into a bag body and the port is welded.
  • the port holder is supported with an endless belt so that the port holder can move.
  • a belt driven type can increase the number of port holders supportable per unit area. Also, the belt driven type is excellent in handling ease because the port holder can be linearly moved. However, the belt driven type is inferior in positioning accuracy in stopping the port holder at a predetermined position. The problem of low positioning accuracy is based on that the driving belt is made of resin. And, if the port holder does not stop at an accurate position, the port cannot be inserted into a predetermined position of an opening (hereinafter, a body opening) of the bag body, inviting poor welding of the port and being prone to produce pin holes at a welded part. Such a resin bag is handled as a defective product.
  • the present invention was made in view of these technological problems, and has an object of providing resin bag manufacturing equipment capable of accurately inserting a port into a necessary position of an opening of a bag body even if a belt driven type moving means with an inferior positioning accuracy is used.
  • the port held by a port holder is interposed between paired upper and lower molds, which are heating means, via a resin film forming a bag body.
  • the molds each have a recessed part corresponding to the outer shape of the port.
  • the port is interposed between these recessed parts.
  • the port cannot be interposed between the recessed parts of the molds when the port is welded, resulting in the occurrence of poor welding of the port.
  • a port holder is provided with a structure in which a portion holding the port is movable by following a force to be applied. With this, even if the port is inserted into a shifted position of the body opening, when the port receives a force from the molds when being interposed between the molds, the port can move to an appropriate position of the recessed parts of the molds together with the port holder holding the port.
  • Resin bag manufacturing equipment of the present invention includes a body fabricating unit fabricating a bag body, a port attaching unit attaching, by welding, a port to the bag body fabricated by the bag body fabricating unit, and a filling unit filling the bag body having the port attached thereto by the port attaching unit with a content.
  • the port attaching unit includes a port holder holding the port when the port is inserted into an opening of the bag body.
  • This port holder includes a ring-shaped holding body configured of a combination of a plurality of segments and directly holding the port, and an elastic body providing the ring-shaped holding body with an elastic force oriented to diameter reduction.
  • the ring-shaped holding body provided with an elastic force oriented to diameter reduction holds the port. For this reason, if a force larger than the elastic force is applied to the port, the port can be displaced against the elastic force applied to the ring-shaped holding body. Therefore, even if the port is inserted into a shifted position of the opening of the bag body, the port makes contact with the molds to move along the recessed parts, thereby being positioned at an appropriate location in the recessed parts. As a result, the port can be welded to the bog body without inviting the occurrence of pin holes.
  • the ring-shaped holding body holding the port be rotatably provided.
  • the ring-shaped holding body (a port holder) before the port is inserted into the bag body.
  • This preheating can be performed by blowing heated air supplied from an air heater onto a necessary portion of the port, as will be described further below.
  • the ring-shaped holding body is rotatably provided.
  • the port When the port holder is preheated while being held by the port holder, as described above, the port (the ring-shaped holding body) is rotated and heated over the entire perimeter thereof so as to melt only the surface. A uniform depth of this melting is preferable to obtain a more uniform seal strength by welding the port to the bag body. To this end, the position of the port with respect to an air heater is required to be specified. However, with the port holder moved in the belt driven type, which is inferior in positioning accuracy, it can be also assumed that melting of the port by preheating may be nonuniform.
  • the port attaching unit of the present invention preferably includes a centering member.
  • the centering member is movable between a first position away from the port held by the ring-shaped holding body and a second position where the centering member makes contact with the port and pushes the port in an axial direction. This centering member is driven to rotate according to rotation of the ring-shaped holding body when the centering member is at the second position.
  • the centering member placed at the second position presses the port, and thereby the port can be displaced against the elastic force applied to the ring-shaped holding body. Therefore, even if the port is held by the ring-shaped holding body at a shifted position with respect to the air heater, the port is moved to an appropriate position by following the centering member, thereby accurately adjusting the distance from the port to the air heater. As a result, the port can be uniformly molten by preheating.
  • the transfer unit preferably includes a positioning apparatus.
  • This positioning apparatus includes a transfer direction guide engaging a tip part of the bag body in a transfer direction.
  • the positioning apparatus includes paired width direction guides that move closer to and away from each other in a direction orthogonal to the transfer direction of the bag body.
  • the bag body is positioned in the transfer direction by a transfer direction guide. Also, by bringing paired width direction guides closer to each other until these guides are in contact with the bag body, positioning in a direction orthogonal to the transfer direction is carried out. Thus positioned bag body is transported by transport means such as a robot to the port attaching unit.
  • the transfer unit preferably includes an accumulating apparatus accumulating the bag body without transporting the bag body to the port attaching unit when an anomaly occurs in either one or both of the port attaching unit and the filling unit that execute a downstream process.
  • the body fabricating unit stops accordingly.
  • the body fabricating unit continues the operation, instead, the fabricated bag bodies are accumulated before they are transported to the port attaching unit.
  • the holder comprises the structure in which a portion holding the port is movable by following a force to be applied.
  • the port when the port receives a force from the molds when being interposed between the molds, the port can move to an appropriate position of the recessed parts of the molds together with the port holder holding the port even if the port is inserted into a shifted position of the body opening. Therefore, according to the resin bag manufacturing equipment of the present invention, the occurrence of poor welding typified by pin holes can be prevented even if the belt driven type moving means with an inferior positioning accuracy is used.
  • Resin bag manufacturing equipment 10 in the present embodiment includes a body fabricating unit 20 fabricating a bag body 100 (refer to FIG. 3 ), a transfer unit 30 transferring the bag fabricated by the body fabricating unit 20 toward the next process, a port attaching unit 40 attaching, by welding, a port 200 to the bag body 100 supplied from the transfer unit 30, and a filling unit 50 filling the bag body 100 having the port 200 attached thereto by the port attaching unit 40 with a content.
  • the body fabricating unit 20 is a portion fabricating the bag body 100 before the port 200 is attached.
  • the body fabricating unit 20 fabricates the bag body 100 by welding and cutting a resin film drawn from a raw film material roll.
  • the bag body 100 has three welded sides, but an opening 101, into which the port 200 is inserted, is not welded.
  • the method disclosed in Patent Document 2 can be applied, and another method can also be applied.
  • various modes can be applied to the bag body 100.
  • the bag body 100 is not restricted to the one having one room for accommodating the content, and the bag body 100 can have a room for accommodating the content sectioned into two.
  • the transfer unit 30 includes a bag transfer conveyor 31 transferring the bag body 100 supplied from the body fabricating unit 20 toward the port attaching unit 40, a positioning apparatus 32 positioning the bag body 100 supplied from the bag transfer conveyor 31, and a transport robot 33 transporting the bag body 100 supplied from the bag transfer conveyor 31 to the positioning apparatus 32.
  • the transfer unit 30 also includes an accumulating apparatus 34 accumulating the bag body 100 without transporting the bag body 100 to the port attaching unit 40.
  • the bag bodies 100 are transferred, for example, while being arranged in a line on the bag transfer conveyor 31.
  • the bag body 100 is transported by the transport robot 33 to the positioning apparatus 32.
  • the positioning apparatus 32 positions the transported bag body 100 in two directions, that is, a transfer direction and a direction orthogonal to the transfer direction (a width direction).
  • the positioning apparatus 32 includes transfer conveyors 321, 321 arranged in two lines.
  • the transfer conveyors 321, 321 each transfer the bag body 100.
  • the transfer conveyors 321, 321 spread over a driving roll 323 driven by a motor 322 and a driven roll 324 placed a predetermined space away from the driving roll 323. With the motor 322 driven for rotation, the transfer conveyors 321, 321 run to transfer the bag body 100 (not shown) placed thereon to the right side in the drawing (in a transfer direction).
  • the positioning apparatus 32 includes a transfer direction positioning guide 325 at an end in the transfer direction.
  • the bag body 100 transferred over the transfer conveyors 321, 321 abuts on the transfer direction positioning guide 325, thereby being positioned in the transfer direction.
  • the positioning apparatus 32 also includes first width direction positioning guides 326, 326 on the left side of the transfer conveyors 321, 321 with respect to the transfer direction, respectively, and second width direction positioning guides 329, 329 on the right side of the transfer conveyors 321, 321 with respect to the transfer direction, respectively.
  • the first width direction positioning guides 326, 326 are connected to each other with a link member 327
  • the second width direction positioning guides 329, 329 are connected to each other with a link member 330.
  • the positioning apparatus 32 includes an air cylinder 328 driving the first width direction positioning guides 326, 326 and an air cylinder 331 driving the second width direction positioning guides 329, 329.
  • the air cylinder 328 and the air cylinder 331 are simultaneously driven to bring the first width direction positioning guides 326, 326 and the second width direction positioning guides 329, 329 having the transfer conveyors 321, 321 interposed therebetween closer to each other until these guides are in contact with the bag body 100.
  • the bag body 100 transferred over the transfer conveyors 321, 321 is positioned in the width direction.
  • the air cylinder 328 and the air cylinder 331 are simultaneously driven to separate the first width direction positioning guides 326, 326 and the second width direction positioning guides 329, 329 away from each other.
  • the bag body 100 is accurately positioned in both of the transfer direction and the width direction, and then is transported to the port attaching unit 40 performing the next process. In this manner, the bag body 100 can be transported to the port attaching unit 40 as being in a posture required for attachment of the port 200, and therefore welding of the port 200 can be appropriately performed.
  • the positioning apparatus 32 does not catch the bag body 100 in the course of positioning, positioning can be stably performed even if undulations are present on the bag body 100.
  • Transfer of the bag body 100 from the positioning apparatus 32 to the port attaching unit 40 can be performed by using a transport apparatus that includes a suction cup that suctions the bag body 100 or a clamper that clamps the bag body 100 and also can ascend and descend and turn around.
  • the bag body 100 positioned by the positioning apparatus 32 is passed to an opening transport apparatus 60 of the port attaching unit 40.
  • the bag body 100 While the attachment of the port 200 to the bag body 100 in the port attaching unit 40 and the filling of the bag (the bag body 100) with the content in the filling unit 50 are being smoothly performed, the bag body 100 is transported by the transport robot 33 to the positioning apparatus 32, and then is supplied to the port attaching unit 40. However, when an anomaly occurs in either one or both of the bag attaching unit 40 and the filling unit 50 (the downstream process), the operation may be stopped. In this case, while the body fabricating unit 20 continues fabrication of the bag body 100, the fabricated bag body 100 is not transported to the positioning apparatus 32 but is accumulated in the accumulating apparatus 34.
  • the body fabricating unit 20 is desirably able to fabricate a good product from the time immediately after the start. However, to fabricate a good product, it takes time to adjust the apparatus, and the bag bodies 100 fabricated before the adjustment is completed are defective products. Therefore, it is preferable to avoid the body fabricating unit 20 from stopping as much as possible. That is why the fabricated bag bodies 100 are accumulated even if the bag attaching unit 40 or the filling unit 50 stops.
  • FIG. 15 An example of the accumulating apparatus 34 is shown in FIG. 15
  • the accumulating apparatus 34 includes two bag accumulating containers 342 on a table 341.
  • the bag accumulating containers 342 are box-shaped members each with its upper part open, and accumulate the bag bodies 100 transported from the transport robot 33.
  • an ascending and descending table 343 is provided in each of the bag accumulating containers 342.
  • the ascending and descending table 343 on which the bag bodies 100 are placed descends as the number of accumulated bag bodies 100 is increased, thereby increasing the number of bag bodies 100 that can be accumulated in the bag accumulating container 342.
  • the descending of the ascending and descending table 343 can be controlled by detecting the bag bodies 100 with a sensor provided to an upper part of the bag accumulating container 342.
  • the mode of operating the bag accumulating container 342 can be any, but can be as follows, for example.
  • the transport robot 33 transports the bag body 100 supplied from the transfer unit 30 to the accumulating apparatus 34 without transporting the bag body 100 to the positioning apparatus 32.
  • the transport robot 33 stops transporting the bag body 100 supplied from the transfer unit 30 to the accumulating apparatus 34 and transports the bag body 100 to the positioning apparatus 32.
  • the bag bodies 100 accumulated in the accumulating apparatus 34 are transported (dispensed) to the port attaching unit 40 for welding to the port 200.
  • the bag bodies 100 accumulated by the bag accumulating containers 342 is positioned, and therefore welding of the port 200 can be appropriately performed also on the bag body 100 dispensed from the accumulating apparatus 34.
  • the fabrication of the bag bodies 100 in the body fabricating unit 20 is stopped.
  • the port attaching unit 40 includes the opening transport apparatus 60, a port transfer apparatus 70, a port welding apparatus 80, and a port aligning apparatus 90.
  • the opening transport apparatus 60 holds the bag body 100 positioned by the positioning apparatus 32 of the transfer unit 30 when supplied, and opens the opening 101 of the bag body 100 before insertion of the port 200 and transfer to a seal position.
  • the bag body 100 held in the opening transport apparatus 60 and with the opening 101 being open, is transferred to the port welding apparatus 80 and is supplied with the port 200 by the port transfer apparatus 70.
  • the port welding apparatus 80 welds the port 200 inserted into the opening 101 of the bag body 100 in cooperation of the opening transport apparatus 60 and the port transfer apparatus 70, to the bag body 100.
  • the port aligning apparatus 90 prevents a core deviation of the port 200 when the port 200 is preheated.
  • the opening transport apparatus 60 has an upper frame 61A and a lower frame 61B arranged approximately in parallel to each other so that the frames are positioned above and below the bag body 100 supplied from the positioning apparatus 32. These upper frame 61A and the lower frame 61B are moved closer or away from each other in a vertical direction by a nip cylinder 62.
  • a lower surface at the tip of the upper frame 61A and a upper surface at the tip of the lower frame 61B are each provided with paired two plate members 63, 63, and a suction cup 64.
  • the upper and lower plate members 63, 63 are arranged so as to be pressed onto both sides of the opening 101 of the bag body 100.
  • the bag body 100 can be clamped by the upper and lower plate members 63 and 63 from both of front and back surfaces on both sides interposing the opening 101.
  • the upper and lower plate members 63 and 63 are provided to arms 65, 65 rotating about the base ends 65a and 65a.
  • the arms 65, 65 being rotated in synchronization with each other by a driving mechanism 66 formed of an air cylinder 66a and a link mechanism 66b, the plate members 63, 63 move closer to and away from each other. That is, with the opening 101 of the bag body 100 being clamped, the arms 65, 65 are rotated in a direction in which the plate members 63 and 63 come closer to each other, thereby opening the opening 101.
  • Each suction cup 64 is arranged at an intermediate part between the paired two plate members 63, 63 so as to face a portion near a film end of the opening 101 of the bag body 100.
  • the suction cups 64 positioned above and below are moved upward and downward each by an air cylinder 67. With the opening 101 of the bag body 100 being suctioned, the upper and lower suction cups 64 and 64 move away from each other, thereby opening the opening 101.
  • an advancing and retreating cylinder 68 moves the upper frame 61A and the lower frame 61B described above in a direction orthogonal to the transfer direction oriented to the port welding apparatus 80.
  • Two sets of the above-configured upper frame 61A and lower frame 61B are equipped correspondingly to the process unit in the resin bag manufacturing equipment 10 being two bag bodies 100. These upper frame 61A and lower frame 61B are movable along a guide not shown between a position corresponding to the positioning apparatus 32 and a position corresponding to the port welding apparatus 80.
  • the upper and lower plate members 63, 63 face the bag body 100 transferred from the positioning apparatus 32 so as to be above and below the opening 101.
  • the upper frame 61A and the lower frame 61B are brought closer to each other by the nip cylinder 62 of FIG. 3 , thereby clamping the bag body 100 with the upper and lower plate members 63, 63.
  • the bag body 100 is transferred toward the port welding apparatus 80.
  • the suction cups 64 are suctioned to the bag body 100 by the upper and lower air cylinders 67.
  • the upper and lower plate members 63, 63 are moved closer to each other by rotating the arms 65, 65 in a direction in which the plate members 63, 63 come closer to each other.
  • the upper and lower suction cups 64 are moved away from each other by the air cylinders 67 to open the opening 101.
  • the port 200 is supplied by the port transfer apparatus 70 to the bag body 100 transported to the port welding apparatus 80 as being held in the opening transport apparatus 60 and with the opening 101 being open.
  • the port transfer apparatus 70 inludes a plurality of holder units 72 spaced a predetermined distance apart from each other on an endless belt 71.
  • each holder unit 72 moves along a track of the belt 71.
  • each holder unit 72 includes a port holder 73 where the port 200 supplied one by one by a port feeder not shown is held.
  • paired clamp members 74A and 74B and also a driving unit are provided on both sides of the port holder 73.
  • the clamp members 74A and 74B clamp the bag body 100 to which the port 200 is welded.
  • the driving unit drives to open and close these clamp members 74A and 74B.
  • the port holder 73 includes a ring-shaped holder case 731.
  • the holder case 731 includes an engaging unit 731a projecting from its front end toward its inner diameter direction. At the tip of this engaging unit 731a, an engaging surface 731b is formed. Note that a side on which the port 200 is held is taken as front in the port holder 73.
  • a hold ring 732 is provided inside the holder case 731.
  • the hold ring 732 is a portion actually holding the port 200 in the port holder 73.
  • the hold ring 732 is formed of a combination of four-way-divided arc-shaped segments 732a to 732d in a ring shape. While four-way division is exemplarily shown herein, the number of divisions can be any.
  • the segments 732a to 732d of the hold ring 732 each include an engaging surface 732f at its front end.
  • the engaging surface 732f is formed at a position facing the engaging surface 731b of the holder case 731, with the hold ring 732 being arranged inside the holder case 731.
  • a spring groove 732e is formed along a circumferential direction.
  • a spiral spring 733 formed in a ring shape is arranged in the spring groove 732e.
  • the spiral spring 733 provides an elastic force oriented so as to reduce the diameter of the hold ring 732 (the segments 732a to 732d) (diameter reduction).
  • the hold ring 732 directly holds the port 200 with its inner perimeter.
  • the spiral spring 733 is merely an example, and another elastic body such as a ring-shaped rubber can be widely applied.
  • the hold ring 732 With the engaging surface 731b of the holder case 731 and the engaging surface 732f of the hold ring 732 being in contact with each other and also with the inner peripheral surface of the hold ring 732 and a support surface 734a of a rotary shaft 734 being in contact with each other, the hold ring 732 is held in the holder case 731 with the diameter reduced most.
  • a space S is provided between the outer perimeter of the hold ring 732 and the inner perimeter of the holder case 731. Therefore, when a force larger than the elastic force is applied to the port 200, the port 200 can be displaced in a diameter direction against the elastic force.
  • the displacement is regulated within a range of the space S. That is, the holder case 731 regulates the amount of displacement of the spiral spring 733 (the port 200).
  • the space S is set according to a positioning error in the belt driven type. For example, the positioning error is on the order of 0.2 mm to 0.3 mm, it is enough to ensure the space S on the order of 0.5 mm.
  • the port holder 73 includes the rotary shaft 734 supporting the holder case 731 and the hold ring 732 on their front end side.
  • the holder case 731 is fixed to the rotary shaft 734 with a bolt B. Thereby, the hold ring 732 is held between the holder case 731 and the rotary shaft 734.
  • the rotary shaft 734 penetrates through a shaft hole 735a via a flange bushing 736, and is rotatably supported to a holding block 735.
  • a pin fixing shaft 737 is provided coaxially with the rotary shaft 734.
  • the pin fixing shaft 737 supports a port support pin 738 at a front end exposed to the outside of the rotary shaft 734.
  • the port support pin 738 fits in a hollow part of the port 200 held by the hold ring 732 to more ensure the holding of the port 200.
  • a gear 79 is fixed onto a rear side of the rotary shaft 734.
  • the rotary shaft 734 is driven for rotation via the gear 79 by a motor 78c of a port rotating mechanism 78, which will be described further below.
  • a slide block 39 is connected to a lower portion of the holding block 735.
  • the slide block 739 is fixed to the belt 71.
  • the slide block 739 is slidably held to a guide rail 71a parallel to the belt 71.
  • the holder unit 72 moves as being guided by the guide rail 71a.
  • the port 200 held by the holder unit 72 is first transported to a port preheating apparatus 76.
  • the port preheating apparatus 76 includes an air heater 77 blowing hot air to preheat the port 200 held by the holder unit 72 and the port rotating mechanism 78 rotating the port holder 73 holding the port 200.
  • the port rotating mechanism 78 has a plate 78a.
  • the plate 78a is provided with a gear 78b, the motor 78c for driving the gear 78b for rotation, and pulleys 78d and 78e and a belt 78f for transmitting a rotation driving force of the motor 78c to the gear 78b.
  • This plate 78a is driven by an air cylinder 78g in a vertical direction.
  • the port holder 73 is rotatably provided about an axial line of the held port 200 and, furthermore, the gear 79 is provided coaxially with the port holder 73.
  • the gear 79 With this gear 79, the gear 78b is engaged when the plate 78a of the port preheating apparatus 76 is caused to descend by the air cylinder 78g. Then, by driving the motor 78c, the port holder 73 is driven for rotation. In accordance with this rotation, the hold ring 732 is also rotated.
  • the port attaching unit 40 includes the port aligning apparatus 90.
  • the port aligning apparatus 90 is provided correspondingly to the port preheating apparatus 76, as shown in FIG. 2 .
  • the port aligning apparatus 90 includes an air cylinder 91 fixed to a mount arm 96.
  • the mount arm 96 is fixed, via appropriate means, to a reference surface where the resin bag manufacturing equipment 10 is placed.
  • the port aligning apparatus 90 is accurately placed at a fixed position with respect to the port preheating apparatus 76.
  • the air cylinder 91 includes a shaft 92 that moves toward and away from the port holder 73. At the tip of this shaft 92, a centering pin 95 is fixed via an intermediate shaft 93 and a ball bearing 94.
  • the centering pin 95 is configured of a projection 95a in the shape of a truncated cone formed on a tip side facing the port holder 73 and a base part 95b connected to the projection 95a and shaped in a hollow cylindrical shape.
  • the ball bearing 94 is engaged with base part 95b.
  • the shaft 92 of the air cylinder 91 is moved from a retreated position (a first position) to a position shown in FIG. 11 (a second position).
  • the projection 95a of the centering pin 95 is inserted inside the port 200 held by the port holder 73.
  • the front end of the port 200 is pressed onto the front end of the base part 95b of the centering pin 95.
  • the centering pin 95 is driven for rotation.
  • the port 200 can be displaced against the elastic force applied to the hold ring 732 by the spiral spring 733.
  • the port 200 can be uniformly molten by preheating.
  • two above-structured port preheating apparatuses 76 are equipped correspondingly to the process unit being two bag bodies 100. Furthermore, in the present embodiment, two sets of two apparatuses are provided for allowing two-step preheating.
  • the port 200 preheated by the port preheating apparatuses 76 is transferred to the port welding apparatus 80 as being held by the holder unit 72.
  • suction by the upper and lower suction cups 64, 64 is set at OFF, and the upper frame 61A and the lower frame 61B are moved by the advancing and retreating cylinder 68 of FIG. 3 to advance.
  • the port 200 held by the holder unit 72 is promptly inserted into the opening 101 of the bag body 100.
  • the upper and lower plate members 63 and 63 come close to each other to keep an open state of the opening 101.
  • the port welding apparatus 80 includes paired upper and lower port seal molds 81, 81.
  • the port seal molds 81 include recessed parts 81a, 81a facing the bag body 100 and each shaped in a semicircle according to the outer peripheral shape of the port 200 and flat parts 81b, 81b on both ends thereof. These port seal molds 81, 81 are heated by a heater not shown within a predetermined temperature range. Also, the port seal molds 81, 81 are driven by an air cylinder or the like not shown in a vertical direction, thereby being movable come close to or away from the bag body 100 and the port 200.
  • the upper and lower port seal molds 81, 81 are brought closer to each other to be pressed onto the bag body 100 and the port 200. Then, the recessed parts 81a, 81a weld the opening 101 and the port 200 inserted therein to each other, and the flat parts 81b, 81b on both sides weld two films F to each other on both side of the opening 101. Thereby, the port 200 is welded to the bag body 100 to form a resin bag.
  • three sides of the bag body 100 have already been welded. Therefore, in welding of the opening 101 and the port 200, wrinkles are less prone to be produced on the films F forming the bag body 100.
  • the position of the port 200 may be shifted with respected to the recessed parts 81a, 81a. This is because the port holder 73 holding the port 200 is driven by the belt 71. However, an elastic force oriented to diameter reduction is applied to the hold ring 732 of the port holder 73. For this reason, when a force larger than the elastic force is applied to the port 200 in the course of being inserted into the recessed parts 81a, 81a, the port 200 can be displaced against the elastic force applied to the hold ring 732.
  • the port 200 is inserted into a shifted position with respect to the recessed parts 81a, 81a, of the port seal molds 81, 81, in other words, a shifted position in the opening 101 of the bag body 100, the port 200 is in contact with the port seal molds 81, 81 and the port 200 is moved along the recessed parts 81a, 81a. Thereby, the port 200 is accurately positioned in the recessed parts 81a, 81a. As a result, the port 200 can be attached to the bag body 100 without inviting poor welding.
  • the upper frame 61A and the lower frame 61B are spaced apart from each other by the nip cylinder 62 of FIG. 3 , thereby releasing clamping of the bag body 100 by the upper and lower plate members 63, 63.
  • the port seal molds 81, 81 are separated away from each other and are pulled away from the bag body 100 and the port 200.
  • the bag body 100 is welded to the port 200, and is held by the holder unit 72.
  • the holder unit 72 moves with the belt 71 being driven in a circular manner, and the bag body 100 (the resin bag) having the port 200 welded thereto is transferred to a port cooling apparatus not shown.
  • a welded part of the port 200 and the bag body 100 is cooled by a cooling block or with cooling air brown thereto.
  • the cooling block is configured to have a shape similar to that of the port seal molds 81, 81 and operate similarly to the port seal molds 81, 81, and the cooling block is cooled in advance to a temperature sufficiently lower than a welding temperature and is then pressed onto the welding part of the port 200 and the bag body 100 from both surfaces for cooling.
  • the resin bag with the port 200 and the bag body 100 being welded to each other is transferred to the filling unit 50 corresponding to the downstream process, where the bag body 100 is filled with a content from the port 200 and a cap is mounted onto the port 200, for example.
  • the port 200 held by the port holder 73 can be displaced when the port 200 receives a force larger than the elastic force applied to the hold ring 732 by the spiral spring 733.
  • the port 200 can be moved to an appropriate position following the centering pin 95. Therefore, the port 200 can be uniformly welded at the time of preheating.
  • the port 200 when the port 200 is welded, the port 200 moves along the recessed parts 81a, 81a of the port seal molds 81, 81. Thereby, the port 200 is accurately positioned in the recessed parts 81a, 81a. As a result, the port 200 can be attached to the bag body 100 without inviting poor welding.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
EP10856932.8A 2010-09-10 2010-09-10 Resin bag production equipment Active EP2614954B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2010/005539 WO2012032581A1 (ja) 2010-09-10 2010-09-10 樹脂バッグ製造設備

Publications (3)

Publication Number Publication Date
EP2614954A1 EP2614954A1 (en) 2013-07-17
EP2614954A4 EP2614954A4 (en) 2016-01-20
EP2614954B1 true EP2614954B1 (en) 2017-11-01

Family

ID=45810208

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10856932.8A Active EP2614954B1 (en) 2010-09-10 2010-09-10 Resin bag production equipment

Country Status (4)

Country Link
EP (1) EP2614954B1 (ja)
JP (1) JP5518204B2 (ja)
CN (1) CN102858526B (ja)
WO (1) WO2012032581A1 (ja)

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Publication number Priority date Publication date Assignee Title
US2327936A (en) * 1942-05-01 1943-08-24 Remington Arms Co Inc Tube drawing apparatus
JPS60189433A (ja) * 1984-03-09 1985-09-26 東洋食品機械株式会社 注入口体付袋の製造装置
GB8428750D0 (en) * 1984-11-14 1984-12-27 Lilly Industries Ltd Stripper rings
CN1035258A (zh) * 1988-02-27 1989-09-06 威尔沃·曼森公司 塑料袋及其制造方法和设备
JP2535091B2 (ja) * 1990-06-25 1996-09-18 日立造船産業株式会社 筒状フィルムを使用した袋状容器製造装置
JP2547890B2 (ja) * 1990-06-25 1996-10-23 日立造船産業株式会社 袋状容器製造装置におけるトランスファ装置
JP2003118748A (ja) * 2001-10-11 2003-04-23 Nipro Corp 容器、容器用口部材及び容器の製造方法
JP2004042447A (ja) * 2002-07-11 2004-02-12 Toyo Jidoki Co Ltd ストッカー装置付き製袋包装機
JP3942522B2 (ja) * 2002-10-16 2007-07-11 日立造船株式会社 製袋機のポート装着装置
DK1737648T3 (da) 2004-10-15 2010-05-10 Pluemat Plate & Luebeck Gmbh & Co Indretning og fremgangsmåde til fremstilling af plastposer med porte
JP4866202B2 (ja) * 2006-10-06 2012-02-01 株式会社フジシールインターナショナル スパウト装着装置
CN101808815B (zh) 2008-08-29 2012-07-18 三菱重工食品包装机械株式会社 树脂袋制造设备

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Also Published As

Publication number Publication date
JPWO2012032581A1 (ja) 2013-10-31
JP5518204B2 (ja) 2014-06-11
CN102858526A (zh) 2013-01-02
EP2614954A4 (en) 2016-01-20
WO2012032581A1 (ja) 2012-03-15
CN102858526B (zh) 2015-11-25
EP2614954A1 (en) 2013-07-17

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