EP0758609B1 - Apparatus for pulling down cylindrically formed film in a bag maker packaging machine - Google Patents
Apparatus for pulling down cylindrically formed film in a bag maker packaging machine Download PDFInfo
- Publication number
- EP0758609B1 EP0758609B1 EP19960305876 EP96305876A EP0758609B1 EP 0758609 B1 EP0758609 B1 EP 0758609B1 EP 19960305876 EP19960305876 EP 19960305876 EP 96305876 A EP96305876 A EP 96305876A EP 0758609 B1 EP0758609 B1 EP 0758609B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- belt
- pull
- bag
- supporting member
- web
- 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.)
- Expired - Lifetime
Links
Images
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
- B65B57/00—Automatic control, checking, warning, or safety devices
-
- 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
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
- B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
-
- 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
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
- B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
- B65B9/2014—Tube advancing means
- B65B9/2028—Rollers or belts
Definitions
- This invention relates to an apparatus, generally referred to as a pull-down belt, for pulling a cylindrically formed bag-making material for a bag maker-packaging machine.
- a bag maker-packaging machine for example, of a so-called vertical pillow type, is generally adapted to bend an elongated web of a thermoplastic flexible bag-making material (hereinafter referred to as "the film") into a cylindrical form around a filling cylinder by means of a component known as the former, to simultaneously seal together its mutually overlapping side edge parts and to use a pair of pull-down belts to pull it further down to a transverse sealer for sealing the cylindrically formed film transversely to the direction of its motion.
- the filling cylinder is for the purpose of dropping articles therethrough to be packaged, and a plurality of formers with different sizes are usually made available for handling films with different widths and different ways of sealing.
- pull-down belts which have been used for this purpose are of the type which will forcefully compress the film between the belt and the filling cylinder while the film is being pulled downward.
- Pull-down belts of this type have the disadvantage that a roller or a slidable plate is required to be buried inside the filling cylinder, thereby narrowing the available passage for the articles dropped therethrough. With pull-down belts of this type, furthermore, it has been difficult to programmatically adjust the contact pressure.
- the present inventor has disclosed, in Japanese Patent Publication Tokkai 5-4609, another type of pull-down belt adapted to pull down a film while causing it to be pulled toward the belt surface by creating a negative pressure condition.
- Pull-down belts of this type are able to overcome the problems of the kind described above, but they have different problems such as not being able to pull the film sufficiently forcefully if the gap between the belt and the film is too large because the suction force by the negative pressure weakens, or causing a zigzag motion of the film if the gaps between the film and the pair of belts on opposite sides thereof are not equal.
- GB-A-2261645 illustrates the use of pull-down belts of the type mentioned above and including a pneumatic cylinder arrangement for moving the belts towards and away from the film.
- apparatus for pulling a cylindrically formed bag-making material in a longitudinal direction with a pair of pull-down belts for a bag maker-packaging machine comprises at least one belt-supporting member adapted to move towards or away from said cylindrically formed bag-making material being transported in said longitudinal direction; a means for moving said belt-supporting member selectably towards or away from said cylindrically formed bag-making material being transported in said longitudinal direction, said pull-down belt being attached to but movable relative to said belt-supporting member; the apparatus being characterized in that it further comprises force-applying means, independent of said means for moving said belt-supporting member, for applying a force on said pull-down belt, said force depending on the relative position between said pull-down belt and said belt-supporting member, and for urging the pull-down belt against the bag-making material.
- This invention overcomes all the problems of prior art pull-down belts, by providing a new apparatus which is even capable of transporting a cylindrically formed film while pressing the film evenly and so lightly such that the friction force generated thereby with the film could apparently not be strong enough to pull it down.
- elastic springs provide the or each of the pull-down belts with a force which depends on the relative positions of the pull-down belts with respect to the corresponding belt-supporting members.
- Fig. 3 shows schematically a bag maker-packaging machine of a vertical pillow type, which incorporates the present invention.
- a flexible, elongated thermoplastic bag-making material (the film S) is originally in the form of a web roll 92 supported around a shaft 95 (serving as web supporting means).
- the film S is pulled out of the web roll 92 by a pair of pull-down belts 4 and guided by a plurality of guide rolls (including dancer rollers) 105 to a former 2 disposed below a hopper 1.
- the function of the former 2 is to bend the film S into a tubular shape , and the tubularly shaped film S is then pulled downward along the peripheral surface of a filling cylinder (sometimes also referred to as a former tube) 3 towards a transverse sealer 110.
- the transverse sealer 110 is for horizontally (that is, transversely to the downward motion of the film S) sealing the film S such that a batch of articles which is dropped simultaneously through the hopper 1 can be sealed inside the bag being formed.
- Each of the pair of pull-down belts 4 is provided with a suction chamber 5 connected to a negative pressure source (not shown) while longitudinal seal parts of the film S are sealed together by means of a longitudinal sealing jaw 8 (shown somewhat removed from the filling cylinder 3 for clarity).
- the adjustment mechanism 10 for causing the pair of pull-down belts 4 to move towards or away from each other according to the size of the former 2 which is currently installed.
- the adjustment mechanism 10 comprises a pair of elongated mutually parallel belt-supporting members 13, disposed in a side-by-side relationship, each supporting a corresponding one of the pull-down belts 4 and being supported so as to be horizontally slidable along a guide rod 12 having both its ends supported by main frames 11 (only one of them shown) of the apparatus.
- This pair of belt-supporting members 13 can be moved towards or away from each other by means of a turnbuckle 16 adapted to be driven by an adjustment motor 15 disposed on one side of the main frames 11.
- each pull-down belt 4 and a belt-driving motor 6 therefor are both supported by a belt-supporting plate 18, and an L-shaped (when seen from above, as shown in Fig. 2) block 19 is attached to its back surface (away from the belt 4).
- This L-shaped block 19 and one end part of a corresponding one of the pair of belt-supporting members 13 are connected to each other by means of a parallelogram linkage mechanism formed with a pair of elongated connectors 20 connected so as to remain parallel.
- a forward protrusion 21 is formed from each belt-supporting member 13, and a weak elastic spring 22 is inserted between this protrusion 21 and the L-shaped block 19 such that the pull-down belt 4 is normally supported at its neutral (unloaded) position.
- a position-indicating rod 23 attached to the L-shaped block 19, penetrating through and protruding to one side of the belt-supporting member 13.
- a limit switch 25 is attached to the belt-supporting member 13 for detecting the distance of this protrusion and outputting a stop signal for stopping the adjustment motor 15 according to this distance of protrusion.
- Fig. 4 shows a control unit 30 for the adjustment mechanism 10 including a memory device 33, means for comparing 34, means for selecting data 32 and a counting means 35.
- the counting means 35 is for counting the number of rotations of the adjustment motor 15, on the basis of outputted pulse from an encoder 17 attached to its shaft, until a stop signal is received from the limit switch 25.
- the memory device 33 is for storing data received from the counting means 35 counted for each type of former.
- the data selecting means 32 is for receiving signals from an external input means 31 such as a keyboard or a touch panel through which necessary data can be inputted by the user, selectively retrieving data which are stored in the memory device 33 for each former and transmitting them to the comparing means 34.
- the comparing means 34 is for comparing data received from the data selecting means 32 with the count data from the counting means 35 and outputting a deceleration signal immediately before their coincidence to thereby cause the adjustment motor 15 to decelerate and a stop signal at the time of their coincidence to thereby stop the motion of the adjustment motor 15.
- a former 2 and a film roll appropriate for the packages to be produced are selected and installed on the machine and the film S is pulled out of the roll to the filling cylinder 3.
- the adjustment motor 15 is then activated to move the pair of belt-supporting members 13 engaged with the turnbuckle 16 towards each other from their mutually separated positions.
- the pull-down belts 4 attached to the belt-supporting members 13 through the aforementioned linkage mechanism and hence movable with respect thereto, come lightly into contact with the film S moving along the outer surface of the filling cylinder 3, they position themselves, each against the elastic force of the associated one of the springs 22, such that the film S can be easily pulled down by the pull-down belts 4 just because it adheres to their inwardly-facing surfaces, not because of friction between the pull-down belts 4 and the film.
- the limit switch 25 on either of the supporting members 13 will detect the protruding position-indicating rod 23 and output a detection signal to the counting means 35 to stop its counting and to the adjustment motor 15 to stop its rotation.
- This routine is repeated for each former 2 with a different size such that the "convenient" position of the pull-down belts 4 corresponding to each former 2 can be preliminarily stored in the memory device 33 in terms of counts counted by the counting means 35.
- the operator has only to specify the former 2 (or its size), say, on a touch panel serving as the input means 31.
- the data selecting means 32 thereupon retrieves from the memory device 33 a corresponding data item for the specified former and transmits it to the comparing means 34.
- control unit 30 Based on this data item and the number counted by the counting means 35, the control unit 30 outputs a signal immediately before their coincidence will occur and another signal at the time of their coincidence, as explained above, to decelerate and stop the adjustment motor 15 without relying on the outputs from the limit switch 25 such that the two pull-down belts 4 are correctly positioned.
- this invention is applicable also to the type of bag maker-packaging machine having no filling cylinder to keep the tubularly formed film open such that articles dropped from above can easily pass therethrough.
- the tubularly formed film in such a case is kept open by adsorption onto pull-down belts each provided with a suction chamber connected to a negative pressure source, and a longitudinally elongated backing plate may be provided such that the longitudinal sealing jaw can press the film against it for effecting the longitudinal sealing.
- a linkage mechanism with a weak elastic spring was disclosed above as an example of fine-adjustment mechanism, this may be replaced by a simple structure using a pair of simple plate springs, as shown at 28 in Fig. 5, in which other components which are substantially similar to those shown in Fig. 2 are indicated by the same numerals.
- Numeral 29 indicates an elongated member adapted to move with the belt-supporting plate 18 and to activate the limit switch 25 for controlling the deactivation of the adjustment motor 15.
- the contact pressure between the pull-down belts 4 and the filling cylinder 3 may be adjusted by providing proximity switches where their contacts are to occur and reversing the direction of rotation of the adjustment motor 15 after a detection signal is outputted from them.
- the invention is applicable also to the kind of bag maker-packaging machine having only one pull-down belt (instead of a pair facing each other and at a 90-degree position from the longitudinal sealing jaw 8, as shown in Fig. 2) disposed opposite the longitudinal sealing jaw 8.
- the invention is applicable also to the kind of bag maker-packaging machine having only one pull-down belt (instead of a pair facing each other and at a 90-degree position from the longitudinal sealing jaw 8, as shown in Fig. 2) disposed opposite the longitudinal sealing jaw 8.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22721795A JP3558143B2 (ja) | 1995-08-11 | 1995-08-11 | 製袋包装機における筒状包材の送り装置 |
JP22721795 | 1995-08-11 | ||
JP227217/95 | 1995-08-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0758609A1 EP0758609A1 (en) | 1997-02-19 |
EP0758609B1 true EP0758609B1 (en) | 2001-07-11 |
Family
ID=16857338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19960305876 Expired - Lifetime EP0758609B1 (en) | 1995-08-11 | 1996-08-09 | Apparatus for pulling down cylindrically formed film in a bag maker packaging machine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0758609B1 (ja) |
JP (1) | JP3558143B2 (ja) |
DE (1) | DE69613774T2 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3750759B2 (ja) * | 1996-09-26 | 2006-03-01 | 株式会社イシダ | 製袋包装機 |
DE19808789B4 (de) * | 1998-03-03 | 2008-02-07 | Rovema - Verpackungsmaschinen Gmbh | Schlauchbeutelmaschine |
AU2007315120B2 (en) * | 2006-10-30 | 2013-03-07 | Ishida Co., Ltd. | Form-fill-seal machine |
JP2011046533A (ja) * | 2009-07-29 | 2011-03-10 | Ishida Co Ltd | 包装装置および吸引制御装置 |
JP7070878B2 (ja) * | 2017-10-13 | 2022-05-18 | 株式会社川島製作所 | ベルト隙間設定機能を備えた製袋充填包装機 |
CN109264116A (zh) * | 2018-11-07 | 2019-01-25 | 北京包美机械有限公司 | 一种倾角包装机 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT8430890V0 (it) * | 1984-10-24 | 1984-10-24 | Simionato Paolo Macchine Confe | Sistema di movimentazione per cinghioli trasportatori particolarmente per macchine insacchetatrici. |
US4620409A (en) * | 1985-01-14 | 1986-11-04 | Kliklok Corporation | Packaging film feed with parallelogram belt support |
GB2261645B (en) * | 1991-11-23 | 1994-09-07 | Bishopbarn Ltd | Film advance mechanism |
US5203760A (en) * | 1992-05-15 | 1993-04-20 | Delaware Capital Formation, Inc. | Apparatus for adjustment of the spacing of film drive assemblies in a tubular film forming device |
-
1995
- 1995-08-11 JP JP22721795A patent/JP3558143B2/ja not_active Expired - Fee Related
-
1996
- 1996-08-09 DE DE1996613774 patent/DE69613774T2/de not_active Expired - Fee Related
- 1996-08-09 EP EP19960305876 patent/EP0758609B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0958606A (ja) | 1997-03-04 |
DE69613774T2 (de) | 2002-05-08 |
JP3558143B2 (ja) | 2004-08-25 |
DE69613774D1 (de) | 2001-08-16 |
EP0758609A1 (en) | 1997-02-19 |
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