EP0183085A1 - Dispositif de pliage des ouvertures de sacs remplis - Google Patents

Dispositif de pliage des ouvertures de sacs remplis Download PDF

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Publication number
EP0183085A1
EP0183085A1 EP85113950A EP85113950A EP0183085A1 EP 0183085 A1 EP0183085 A1 EP 0183085A1 EP 85113950 A EP85113950 A EP 85113950A EP 85113950 A EP85113950 A EP 85113950A EP 0183085 A1 EP0183085 A1 EP 0183085A1
Authority
EP
European Patent Office
Prior art keywords
folding
fingers
bag
sack
folding fingers
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.)
Withdrawn
Application number
EP85113950A
Other languages
German (de)
English (en)
Inventor
Wolfgang Schwarz
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.)
Greif Werk Maschinenfabrik GmbH
Original Assignee
Greif Werk Maschinenfabrik GmbH
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 Greif Werk Maschinenfabrik GmbH filed Critical Greif Werk Maschinenfabrik GmbH
Publication of EP0183085A1 publication Critical patent/EP0183085A1/fr
Withdrawn legal-status Critical Current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
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/02—Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks
    • B65B7/06—Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks by collapsing mouth portion, e.g. to form a single flap

Definitions

  • the invention relates to a device for folding the opening of filled sacks, in particular sacks with an inward deep fold on both narrow sides, consisting of two groups, each with three sword-like folding fingers, of which two pairs of folding fingers each from above into the opening of a sack that is conveyed upright can be moved and the third folding finger of each group can be brought into the folding position on the outside of the assigned narrow side of the bag, the folding fingers of the two pairs of folding fingers being initially adjustable transversely and then parallel to the plane of the bag and then being closed to form the deep fold while closing the The two third folding fingers can be moved into the folding position when the two folding finger pairs are unloaded.
  • the third folding finger of the two folding finger groups can be moved back and forth linearly in order to form the so-called deep fold in the upper region of the narrow sides of the filled sack. by means of a pressure medium cylinder drive. Since the third folding fingers have to travel a relatively long way between their folding position and their starting position, the pressure medium cylinder must work quickly if a satisfactory hourly performance of the device is to be achieved.
  • the hourly output to date has been around 800 sacks and no longer meets today's expectations, since, for example, the sewing or welding device arranged downstream of the folding device achieves a higher output per hour.
  • the object of the invention is to improve the device mentioned in the introduction in such a way that the third folding fingers can be operated more quickly than before.
  • the solution to the problem is based on the specified device and is characterized in that the third folding fingers are pivotable and can be brought from the folding position into a rest position, in which they are the way for the further transport of the folded bag and for the transport of the next one to be folded Release sacks.
  • This solution enables the third folding fingers to work faster, because the pressure medium cylinders for actuating these folding fingers engage the folding fingers in the vicinity of the axis of rotation of the folding fingers, so that the rest of the area of the folding fingers, which is concerned with the folding process can be moved back and forth with increased speed between the starting position and the folding position.
  • the hourly performance of the device is increased by this solution to at least 1000 to 2000 bags, which means an increase of at most about 50%.
  • Another advantage is that this solution can be carried out in a structurally simple manner, because the pressure medium cylinders in question can be arranged vertically, which makes the device more compact.
  • the proposed device is generally, but not necessarily, a component of a larger machine, which as a rule also has a closing device 2, which is not relevant here, for sewing or welding the folded openings of the filled bags, depending on whether it is paper or plastic sacks to be able to close.
  • Both devices are carried by a common stand 3, such that they are adjustable in height, as with the double arrow 4 is indicated.
  • the stand 3 is provided in a known manner with a height-adjustable block 5 to which the devices 1 and 2 are attached.
  • the device 1 consists of a horizontal support 6, a frame 8 movable thereon via rollers 7, which is moved horizontally by a traction mechanism operation 10 driven by an electric motor 9, this movement being limited or braked by means of limit switches 11 and dampers 12 and stops 13 , a guide device 16 carried by the frame 8 via a lifting cylinder 14 and guided there by rollers 15, and comprising two horizontally movable carriages 17 and 18 carried by the guide device, each with a folding finger group 19 or 20 consisting of three sword-like folding fingers.
  • a stationary crank control device 21 which interacts with the guide device 16, is provided in order to fix the forward-downward movement of the guide device and thus of the folding finger groups 19, 20 during the folding process.
  • the guide device has a roller 22 running on the cam control device 21.
  • the guide device 16 consists of a frame 23, the upper part of which has the rollers 15 and 22 mentioned and the lower part of which extends essentially parallel to the carrier 6, in which direction of extension the conveying direction of the bag to be closed by the device 1 also lies, which is indicated by arrow 24.
  • the direction of movement of the goods 17 and 18 is predetermined by two horizontal pairs of rails 25, 26 on the lower part of the guide device 16. These pairs of rails are fastened at the ends to holding plates 27, which also each have a pressure medium cylinder 28, 29 for the counter-clockwise reciprocating movement of the one shown in FIG. 1, very schematically Carriage 17, 18 shown.
  • the starting position of the carriages carrying the folding finger groups 19, 20 essentially corresponds to the position shown in FIG. 1, so that the carriages move apart in order to achieve their working position in which the folding finger groups rest against the narrow sides of the bag (FIG. 5).
  • Each carriage 17, 18 consists of six horizontal guide rails 30 which are fastened at their ends to holding plates 31, 32, the plates 32 on their other side each having two axle bodies 33 (FIG. 4) and each axle body with one in the pairs of rails 25 , 26 running wheel pair 34 is provided.
  • Each carriage 17, 18 is provided with two support units of 35 and 36, respectively, which run on rollers 37 on the guide rails 30 and are each driven in the opposite direction by pressure medium cylinders 38 and 39, which act on the units 35, 36 and on the other hand, are fastened to the holding plates 31, 32.
  • the downwardly extending folding finger groups 19 and 20 are arranged on the carrying units 35, 36. As best shown in FIG. 3, each unit 35 is rigidly connected to a lateral sword-like folding finger 19a, while a third sword-like folding finger 19b is provided in the middle between the two lateral fingers 19a, but protrudes relative to them according to FIG. 2 (folding position).
  • the sword-like folding fingers 20a, 20b of the other carriage 18 are arranged accordingly.
  • the third folding fingers 19b and 20b are not attached to the units 35 and 36, but are approximately in the Longitudinal center of the carriages 17 and 18, for example, pivotably articulated on the respective lower front rail 30.
  • Each folding finger 19b, 20b has a short lever arm 40 near its pivot axis, the piston rods 41 being articulated on each lever arm by pressure medium cylinders 42 (FIG. 2).
  • the cylinders 42 are located above the carriages 17, 18 and are pivotally mounted on arms 43, the latter also being fastened to one of the rails 30.
  • the folding fingers In addition to folding the sack opening of a filled sack made of paper or plastic (film), the folding fingers have the effect that the Sac?:. Ends do not have any corner areas that otherwise point in the direction of the narrow sack sides, which tightly stack filled sacks on pallets not allow and which are particularly susceptible to bag damage, an hourly folding performance of the device of at least 1000 to 1200 bags. This achievement represents an increase of approximately 50% compared to previously known devices.
  • control curve device 21 is designed such that the control curve ends at the outlet 21a is connected to an additional, relatively short control curve section 21b, which consists of an increasing and a decreasing curve section (FIG. 1), for example in the form of an arc, as a result of which the folding finger groups 19, 20 are raised and then lowered briefly.
  • the folded top end 45a of the bag experiences a kink 46 extending across the width of the bag (FIG.
  • the function of the device described below is as follows. It is assumed that the frame 8 (FIG. 1) is located in the right end region of the carrier 6, so that the lifting cylinder 14 holds the guide device 16 in the uppermost position.
  • the folding finger groups 19 and 20 have such a position that the lateral folding fingers 19a and 20a are essentially together, as shown in FIGS. 1 and 3, and that the pivotable, third folding fingers are in their rest position, which are also off Figures 1 and 2 can be seen.
  • a filled, open top bag 45 conveyed by a conveyor 47 then has a free inlet below the guide device 16 the device 1.
  • the frame 8 is moved synchronously by means of the drive 9, 10, the lifting cylinder 14 simultaneously causing the guide device 16 to lower when the control cam device 21 is reached.
  • the lateral folding fingers 19a, 20a each forming a pair of folding fingers, enter the open-top sack and are first moved apart outwards when the cylinder pairs 38 and 39 reach a sufficient depth, thereby spreading the sack opening.
  • These pairs of folding fingers are then moved parallel to the sack plane in the direction of the narrow sides of the sack by the cylinders 28 and 29 of the guide device 16 with relieved cylinder pairs 38, 39 until they come to rest there.
  • the two cylinders 42 are actuated, which now pivot the third folding fingers 19b, 20b downward into the folding position and thereby form a so-called deep fold at the top of the bag between the pairs of folding fingers mentioned, which can be seen from the left-hand illustration in FIG. 5.
  • the folding fingers of the pairs of folding fingers are moved together inwards again.
  • the aforementioned kink 46 is now formed at the top of the bag 45a.
  • the roller 22 is raised by the section 21b, so that the guide device 16 and thus the folding finger groups 19 and 20 also rise. Then the roller 22 lowers again, so that the folding finger groups 19, 10 are also moved downward, the static friction between the folding finger groups and the bag material acts that the upper end of the bag 45a is pressed down, whereby the kink 46 is formed.
  • the sack folded in this way has reached a further conveying device 48 of known type, the inlet end of which has arms 48a which can be moved in the manner of scissors and which now grip the folded sack end 45a approximately in the region of the fold 46, which is done by the pressure medium cylinders 49.
  • the lifting cylinder 14 can move the guide device 16 upwards, as a result of which the folding finger groups 19, 20 are pulled out of the top of the bag, after which the frame 8 and thus the guide device 16 are again moved into the right starting position.
  • the folded sack 45 is further fed to the sewing or welding device 2 for final closing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
EP85113950A 1984-11-24 1985-11-02 Dispositif de pliage des ouvertures de sacs remplis Withdrawn EP0183085A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3442943 1984-11-24
DE19843442943 DE3442943A1 (de) 1984-11-24 1984-11-24 Vorrichtung zum falten der oeffnung von gefuellten saecken

Publications (1)

Publication Number Publication Date
EP0183085A1 true EP0183085A1 (fr) 1986-06-04

Family

ID=6251095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113950A Withdrawn EP0183085A1 (fr) 1984-11-24 1985-11-02 Dispositif de pliage des ouvertures de sacs remplis

Country Status (2)

Country Link
EP (1) EP0183085A1 (fr)
DE (1) DE3442943A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105947322B (zh) * 2016-06-29 2018-04-20 芜湖恒耐特传动设备有限公司 一种水泥包装袋翻边折叠装置
CN106043825B (zh) * 2016-06-29 2018-08-03 芜湖恒耐特传动设备有限公司 包装袋自动翻边折叠装置
CN105947259B (zh) * 2016-06-29 2018-08-03 芜湖恒耐特传动设备有限公司 水泥包装袋翻边折叠自动处理装置
CN105905364B (zh) * 2016-06-29 2018-04-20 芜湖恒耐特传动设备有限公司 一种水泥包装袋自动翻边折叠装置
CN105947258B (zh) * 2016-06-29 2018-04-20 芜湖恒耐特传动设备有限公司 一种水泥包装袋翻边折叠自动处理装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2952959A (en) * 1957-05-20 1960-09-20 Continental Can Co Container filling and closing machine
DE1174245B (de) * 1961-04-21 1964-07-16 Jagenberg Werke Ag Vorrichtung zum M-foermigen Einfalten zweier gegenueberliegender Wandteile beim Verschliessen von Packungen aus Papier od. dgl.
US4070853A (en) * 1977-01-10 1978-01-31 Thermoguard Insulation Company Open top plastic bag sealer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2952959A (en) * 1957-05-20 1960-09-20 Continental Can Co Container filling and closing machine
DE1174245B (de) * 1961-04-21 1964-07-16 Jagenberg Werke Ag Vorrichtung zum M-foermigen Einfalten zweier gegenueberliegender Wandteile beim Verschliessen von Packungen aus Papier od. dgl.
US4070853A (en) * 1977-01-10 1978-01-31 Thermoguard Insulation Company Open top plastic bag sealer

Also Published As

Publication number Publication date
DE3442943A1 (de) 1986-06-05

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