EP0232887A1 - Automatische Entnahmevorrichtung für Plastikbeutel - Google Patents

Automatische Entnahmevorrichtung für Plastikbeutel Download PDF

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Publication number
EP0232887A1
EP0232887A1 EP87101773A EP87101773A EP0232887A1 EP 0232887 A1 EP0232887 A1 EP 0232887A1 EP 87101773 A EP87101773 A EP 87101773A EP 87101773 A EP87101773 A EP 87101773A EP 0232887 A1 EP0232887 A1 EP 0232887A1
Authority
EP
European Patent Office
Prior art keywords
bag
roller
frame
bags
tear line
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.)
Granted
Application number
EP87101773A
Other languages
English (en)
French (fr)
Other versions
EP0232887B1 (de
Inventor
Jean-Claude Cesar
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.)
RASEC SA
Original Assignee
Rasec SA
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 Rasec SA filed Critical Rasec SA
Priority to AT87101773T priority Critical patent/ATE48256T1/de
Publication of EP0232887A1 publication Critical patent/EP0232887A1/de
Application granted granted Critical
Publication of EP0232887B1 publication Critical patent/EP0232887B1/de
Expired legal-status Critical Current

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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
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/12—Feeding flexible bags or carton blanks in flat or collapsed state; Feeding flat bags connected to form a series or chain
    • B65B43/14—Feeding individual bags or carton blanks from piles or magazines
    • B65B43/22—Feeding individual bags or carton blanks from piles or magazines by rollers

Definitions

  • the invention relates to the distribution of plastic bags such as those commonly used in supermarkets at exit points.
  • the object of the invention is to provide an automatic bag dispenser which is in itself simple and economical, which uses only conventional and economical bags, and finally which avoids any waste.
  • the invention consists in using a support for bundled bags in front of which a frame, movable relative to the support, applies, with a determined application force, at least one roller with an axis parallel to the weakening line separating each tab connecting the edge forming the opening of the bag, this roller being rotated over one complete revolution for each bag distribution cycle, and being circumferentially divided into two sectors, including a drive sector, the development of which is substantially equal to the distance between the contact generator of the roller and the first bag and said line of weakness, and which is coated with a product ensuring proper adhesion with the wall of the bag to produce under the effect of said force d application of a driving force of the bag greater than the tensile strength of this line of weakness, and a sliding sector for which this same force of application of the roller produces a e driving force lower than the pullout resistance of this line of weakness.
  • Each bag 1 comprises on each side the double lateral pleats 2 of the sheath, with inward the internal pleat 3 of the bellows, a transverse bottom weld 4 and two upper welds 5 closing the bellows at the straps 6 intended to constitute the handles being opened by the lateral edges 7 of the notch which project slightly beyond the internal folds 3.
  • the bottom 8 of the U-shaped notch constitutes the edge of the opening of the bag and comprises, in the vicinity of its central part, a connecting tab 9 which is incompletely separated from the bag 1 by means of a rupture line 10 extending the bottom 8 inside each leg 9.
  • This rupture line 10 is formed of successive slots leaving subsist between them sized reserves to ensure a resistance to tearing determined. All of the connecting tabs 9 of the 50 bags of a bundle are joined together in a single bundle attachment 11 by hot welding, and generally provided with perforations 12 to facilitate its tearing off after handling and stacking of the bundles at the end of manufacture, especially for counting and storing bags in group packaging.
  • the invention uses such bundles of bags, which are particularly economical since they are already produced in large quantities by fully automatic means. On the other hand, it proposes to relax the various bags successively and individually from a bundle or a stack of bundles and in an automatic manner.
  • each bundle is twice as large at the side bellows and straps 6 as at the central part, which does not allow regular stacking.
  • the plastic used generally an ultrathin polyolefin, is extremely deformable and very slippery, so that all the usual means of handling used for example in stationery are ineffective.
  • the invention uses a support 13, which is assumed for the moment to be vertical, with a compensating shim 14 vertically occupying the central region of the bag substantially over the width of the bundle attachment 11 and intended to compensate for the differences in thickness which have just been indicated.
  • this wedge has two hooks 15, visible in particular in FIG. 3, and intended to penetrate through the openings 12 of each bundle attachment 11, so as to thus constitute a suspended reserve of one or more bundles bags. For example, a dozen bundles of 50 bags constitutes a reserve of 500 bags, generally sufficient for one day of operation and nevertheless leading to a relatively reasonable thickness.
  • the dispenser comprises an articulated frame, formed by two lateral arms 16 joined at their upper part by a cross member 17, the two arms being articulated at their lower end by means of two articulations 18 fixed at the bottom of the support 13.
  • a geared motor 19 driving in rotation a shaft 20 which rotates in appropriate bearings in each arm 16 and which is mounted parallel to the rupture line 10 of the bags 1, at a certain distance below that -this.
  • a cylindrical roller 21 On this shaft 20 is wedged a cylindrical roller 21 whose length is substantially equal to or slightly greater than the length of the breaking line 10 of each bag.
  • the device further comprises a locating disc 22, wedged on the shaft 20 or on the other end of the axis of the geared motor 19, and making it possible to locate an angular position determined from this shaft, therefore from the roller 21.
  • a weight or spring device exerts a tilting force on the tilting frame 16-17 to apply the roller 21 against the stack of bags.
  • This device can be constituted for example by a pair of cables 25 returned on pulleys 26 and leading to a counterweight or to a not shown spring reel drum.
  • the periphery of the roller 21 comprises a drive sector 27, the development of which, starting from the horizontal generator 28 in contact with the stack of bags in the rest position, corresponds substantially to the distance between this generator 28 and the rupture line 10.
  • This drive sector 27 is coated with an adhesion material allowing, with the effort of application of the roller supplied by the cables 25, to ensure a drive effort of the first bag greater than the resistance to tearing of its breaking line 10.
  • the roller 21 is coated on this arc 27 with an adherent part constituted for example by coarse-grained emery cloth allowing it to hang in the plastic used by micro-penetrations rather than by friction.
  • This adherent part can also be constituted by a rubber coating with surface sculptures, like the product sold under the designation of "flu surface”, reference GN 20 of the Balatros brand.
  • the complementary arc 29 of the roller 21 remains on the contrary entirely smooth so that, always with the same application force, it exerts on the bag against which it is in contact only a force less than the resistance to tearing of the breaking line.
  • the roller 21 is close to the breaking line 10 so that its grip arc 27 is limited to approximately 90 °, the majority of the circumference therefore remaining smooth.
  • a pair of bungee cords 30 hooked to the support 13 hold these straps in position while allowing their escape during traction.
  • the assembly is naturally enclosed in a protective cover, not shown, leaving an opening slot at the lower end, so that the preceding movement allows the first bag to pass through this slot, then fall entirely, or failing this. be able to be extracted by hand.
  • a second roller 31 can be placed below the roller 21 and mounted on a shaft 32 parallel to the previous one, to which it is joined by a carriage formed by two longitudinal members 33 joined by a cross member 33a.
  • the shaft 32 is pressed individually in the direction of the bag stack by a pair of springs 34, and the roller 31, like the roller 21 and as shown in FIG. 4, has a drive sector 27a and a smooth complementary sector 29a, with the same relationship between the development of the grip arc and the distance to the breaking line 10.
  • the roller 31 being much lower above this breaking line than the roller 21, the arc 27a occupies, for example, an arc from 300 to 320 °, while the sliding arc 29a occupies the rest, that is to say from 60 to 40 ° C only.
  • the two rollers 21 and 31 must be rotated in synchronism to return each time to its rest position.
  • the control of the device according to the invention therefore amounts exclusively to supplying power to the motor 19 to perform these successive complete turns of the shaft 20 under the desired conditions.
  • an electronic device corresponding to the diagram in FIG. 6 is preferably used.
  • the diagram essentially comprises a binary counter 38, which can comprise only one hexadecimal decade, and a discriminator 39 which, for each pulse received from the push-button 36, determines whether the time t which separates the rising edge of a new pulse from the rising edge of the previous pulse is greater than or equal to a value to, for example 5 seconds. If it does, it sends a reset pulse at 40 to the reset input of counter 38.
  • a decoder 43 coupled to the outputs of the binary counter 38, and which operates for example as a decimal binary decoder, sends by 44 a stop signal to the device 42 if the decimal number N decoded is equal to 9 for example.
  • the decoder Conversely, if the decoder detects a zero value of N, it sends a stop pulse by 45 to a zero stop device 46 inserted on the transmission of the pulses of the button 37 ordered by the client.
  • These pulses which pass through 46 if N is greater than 0, pass through a shaping device 47 and control by their rising edge the establishment of the output signal 49 of a trigger device 48, which is interrupted when 'it receives the rising edge of a pulse from the device 23 for detecting the rest position. At the same time this last pulse is sent by 50 to the DEC decrement input of counter 38.
  • the operation is therefore as follows: when the cashier, in view of the volume of purchases made by the customer, presses the button 38 a certain number of times, for example three times to unlock three bags, the device 39 produces the initialization counter to zero, then sending an increment to change it to 1 during the first pulse. The following pulses, successive at an interval of less than 5 seconds, produce successive increments but not reset. If the cashier pushes the button 36 more than nine times, the following pulses have no effect, thanks to the device 42, in order to avoid an unexpected return to zero of the binary counter 38. The figure retained therefore corresponds to the maximum number of bags allocated to the customer. The number 9 seems to answer all practical cases, but it is naturally possible to reduce or increase it, for example up to 16 for a hexadecimal decade, or beyond by using several decades.
  • the device is therefore extremely efficient mechanically, but at the same time relatively simple and easy to use, even in the most complex case envisaged.
  • the support 51 is constituted by a flap articulated at its base at 52 on the fixed frame 53 constituting the frame of the device, while the drive roller, here formed of two rollers 21 spaced wedged on the same shaft 20 , is worn to pivot in the same frame 53,
  • the geared motor 19 and the locating disc 22 are therefore also fixed, which simplifies the production.
  • the bundle of bags 1 is hooked to the support 51 in the inverted position, that is to say with the bottoms 4 of the bags at the upper part and the bundle attachment 11 in the lower position.
  • the return springs 54 hooked on the frame 53, act on the support 51 by means of a bar or a roller 55 carried by two rods 56 articulated at 57 on the frame 53.
  • the support 51 is completely freed, which can tilt horizontally, or even in a downward position which facilitates the attachment of new bundles 11 of bags 1 on the hooks 15. Then the support 51 is raised by holding the bottoms of the bags 1 by hand until the stack of bags presses on the rollers 21. We then only have to fold down the link 56 so that the roller 55 exerts its action on the support 51.
  • the entire mechanical part is enclosed in an inner cover 58 leaving the rollers 21 to protrude only through windows 59.
  • the whole device can also, like the previous, be enclosed in an outer cover, not shown, leading to an exit of the bags.
  • This latter variant is particularly advantageous insofar as it can be placed at the end of the supermarket checkout counter furniture, below the level of the recovery table, the bags then being ejected onto this table without the device being presents an annoying bulk.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Apparatuses For Manual Packaging Operations (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Making Paper Articles (AREA)
  • Nozzles (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
EP87101773A 1986-02-10 1987-02-09 Automatische Entnahmevorrichtung für Plastikbeutel Expired EP0232887B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87101773T ATE48256T1 (de) 1986-02-10 1987-02-09 Automatische entnahmevorrichtung fuer plastikbeutel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8601793A FR2594024B1 (fr) 1986-02-10 1986-02-10 Distributeur automatique de sacs plastiques.
FR8601793 1986-02-10

Publications (2)

Publication Number Publication Date
EP0232887A1 true EP0232887A1 (de) 1987-08-19
EP0232887B1 EP0232887B1 (de) 1989-11-29

Family

ID=9331975

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87101773A Expired EP0232887B1 (de) 1986-02-10 1987-02-09 Automatische Entnahmevorrichtung für Plastikbeutel

Country Status (4)

Country Link
EP (1) EP0232887B1 (de)
AT (1) ATE48256T1 (de)
DE (1) DE3761040D1 (de)
FR (1) FR2594024B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014137308A1 (en) * 2013-03-08 2014-09-12 Begi̇n Endüstri̇yel Maki̇ne San. Ti̇c. Ltd. Şti̇. Automatic plastic bag dispenser

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH547743A (de) * 1972-02-15 1974-04-11 Zellweger Uster Ag Tragtaschenspeicher fuer die aufnahme eines stapels von tragtaschen, mit mittel zur entnahme einer tragtasche aus diesem stapel.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972157A (en) * 1975-03-24 1976-08-03 Sanford Meyers Bag holding and opening apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH547743A (de) * 1972-02-15 1974-04-11 Zellweger Uster Ag Tragtaschenspeicher fuer die aufnahme eines stapels von tragtaschen, mit mittel zur entnahme einer tragtasche aus diesem stapel.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014137308A1 (en) * 2013-03-08 2014-09-12 Begi̇n Endüstri̇yel Maki̇ne San. Ti̇c. Ltd. Şti̇. Automatic plastic bag dispenser

Also Published As

Publication number Publication date
FR2594024B1 (fr) 1988-12-02
DE3761040D1 (de) 1990-01-04
FR2594024A1 (fr) 1987-08-14
ATE48256T1 (de) 1989-12-15
EP0232887B1 (de) 1989-11-29

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