EP0395941B1 - Dispositif pour vider des sacs remplis de matières en vrac - Google Patents

Dispositif pour vider des sacs remplis de matières en vrac Download PDF

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Publication number
EP0395941B1
EP0395941B1 EP90107417A EP90107417A EP0395941B1 EP 0395941 B1 EP0395941 B1 EP 0395941B1 EP 90107417 A EP90107417 A EP 90107417A EP 90107417 A EP90107417 A EP 90107417A EP 0395941 B1 EP0395941 B1 EP 0395941B1
Authority
EP
European Patent Office
Prior art keywords
sack
opening
roller brush
swivelling
axis
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
Application number
EP90107417A
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German (de)
English (en)
Other versions
EP0395941A1 (fr
Inventor
Simon Redl
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.)
Anton Steinecker Maschinenfabrik GmbH
Original Assignee
Anton Steinecker 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 Anton Steinecker Maschinenfabrik GmbH filed Critical Anton Steinecker Maschinenfabrik GmbH
Publication of EP0395941A1 publication Critical patent/EP0395941A1/fr
Application granted granted Critical
Publication of EP0395941B1 publication Critical patent/EP0395941B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65B69/00—Unpacking of articles or materials, not otherwise provided for
    • B65B69/0008—Opening and emptying bags

Definitions

  • the invention relates to a device for emptying bags filled with bulk material according to the preamble of claim 1.
  • Such a device is known from GB-A-1 105 006.
  • the sack is placed through a door on a receiving table, the sack being cut into two parts by a circular knife of relatively large diameter after the door has been closed.
  • the feed table consists of two swivel plates that form a flat surface of the feed table in their starting position. Below the swivel plates, swivel frames are arranged which are provided with spikes which pass through holes in the swivel plates before swiveling them up and penetrate into the sack such that the two separate parts of the sack are held in place when swiveling the swivel plates up.
  • the two parts of the bag are emptied by gravity and, if necessary, by shaking the swivel plates.
  • the swivel plates swivel back into their starting position, the spikes also retracting downward again from the swivel plates.
  • the empty bag is then transported by means of a change flap to an empty bag compressor which consists of a screw conveyor arranged in a housing.
  • the invention has for its object to provide a device according to the preamble of claim 1 so that a complete and safe emptying of the sack is guaranteed, ensuring that parts of the cut sack do not get together with the bulk material in the conveyor when emptying.
  • the suction line has a switchover device, with the aid of which the suction process is also possible via a suction nozzle connected to the switchover device by a flexible hose. If the suction nozzle is used manually, it is possible to partially remove a defined quantity of bulk material from a sack. The emptying of the sacks using the swivel plates is interrupted while the suction nozzle is in use.
  • the device is arranged in a housing 1.
  • the device housing 1 has a pivoting door 2, which is also indicated in FIG. 1 in the pivoted-up position.
  • the device has a frame 3 which serves as a support for the various devices.
  • a stationary support table 4 is attached to the frame 3.
  • This support table 4 is followed by a feed surface 5 on the frame, which is below the level of the support table 4.
  • a circular knife 6 is mounted on the frame by means of a drive shaft, which The axis is transverse to the direction of displacement of the sack.
  • the cutting knife 6 can be rotated in the direction of the arrow by a motor drive.
  • the feed surface 5 adjoins at the same level, i.e. without heel, a support surface 7, which is also mounted on the frame 3.
  • the support surface 7 is represented by two swivel plates 8 arranged side by side, which abut one another in the horizontal position in the longitudinal center.
  • a collecting funnel 9 is provided in the frame, to which a screw conveyor 10 is assigned.
  • a switching device 28 which is shown in FIGS. 5 and 6, can be connected to the conveyor screw 10.
  • a slide bar 11 is arranged, which is supported by tabs (not shown) which engage through longitudinal slots in the feed surface 5 and are themselves guided in a longitudinally displaceable manner and can be driven by a crank drive 12.
  • Each pivot plate 8 is pivotally mounted on a pivot axis 13, these pivot axes 13 being horizontally displaceable outwards according to the arrow directions in FIG. 3.
  • an abutment plate 14 is fixed in place by means of a column 15 in the manner of a flag, the lower edge of the abutment plate being at a distance from the support surface 7 which is greater than the thickness of the filled sack 16.
  • each swivel plate 8 below each swivel plate 8 is a swivel frame 17, which can be swiveled up in the same sense as the associated swivel plate 8. ( Figure 3).
  • Each swivel frame carries spikes 26 which can pass through holes in each swivel plate 8.
  • a worm housing 18 is mounted on the side of the frame, the main axis of which runs parallel to the direction of displacement of the bag 16.
  • a screw conveyor (not shown) is arranged in the screw housing 18.
  • the worm housing 18 has a slot 19 on the side on the underside (FIG. 4), the length of which is greater than the width of the sack 16.
  • a roller brush 21 is mounted by means of a swivel frame 20.
  • the swivel frame 20 can be swiveled about a swivel axis 22 running parallel to the longitudinal axis of the screw housing 18 from an obliquely upward position (FIG. 3) in the direction of the arrow to a position in which the roller brush rests on the surface of the swivel plates 8 (FIG. 4).
  • the roller brush 21 is driven by a motor (not shown) in the direction of the arrow according to FIG. 3.
  • the worm housing 18 is provided at one end with a tubular extension 27 (FIG. 1 and FIG. 2), in front of which the screw conveyor ends.
  • the roller brush has plastic bristles 23, between which radially protruding metal pins 24 are attached to the roller body, which protrude somewhat from the plastic bristles 23.
  • the roller brush 21 can be formed from a cylindrical, rotatable metal basket which has radially projecting rubber profile strips arranged on its outer circumference in the longitudinal direction of the cylinder.
  • a switching device 28 is shown in cross section. Via a suction line 53, it can be connected directly to the screw conveyor 10 or the collecting funnel 9.
  • the suction line 53 is connected to a suction line opening 29 of the switching device 28 with the aid of a connecting flange 31.
  • This is formed from a cylindrical central body 44 and two disks 45 and 46 placed on the ends of the central body.
  • the disks 45 and 46 are fixed to one another in the center by the axis of rotation 47 and screws 48 and 49.
  • the central body 44 is arranged concentrically to the axis of rotation 47 and rotatable about this and relative to the disks 45 and 46.
  • the suction line opening 29 is formed eccentrically to the axis of rotation 47 in the disk 45.
  • the connecting flange 31 and the suction line opening 29 have essentially the same diameter C.
  • a sealing ring 35 is arranged between the connecting flange 31 and the suction line opening 29, and the flange 31 can be connected to the disk 45 with the aid of screws 33.
  • a pump opening 30 is formed in the disk 46 coaxially with the suction line opening 29 of the disk 45.
  • the diameter B of this opening corresponds to the diameter C of the suction line opening 29.
  • the pump opening is a connection 55 to a suction pump by means of a flange 32, a sealing ring 36 and Screws 34 made.
  • a linear channel 37 is formed in the central body 44 eccentrically to the axis of rotation 47. This channel runs at a distance F parallel to the axis of rotation 47 and, in the rotational state of the central body 44 shown in FIG. 5, connects the suction line opening 29 to the pump opening 30.
  • the diameter A of the linear channel 37 corresponds to the diameters B and C of the disks 45 and 46 arranged openings 29 and 30. Therefore, the linear channel 37 in FIG. 5 is arranged in a form-fitting manner with respect to the suction line opening 29 and pump opening 30.
  • a connecting channel 42 extending in the direction of the axis of rotation 47 is formed centrally between the disks 45 and 46 in its circumference 56. This is followed radially outward by a connecting flange 39 arranged in a recess in the central body. This is connected to the central body 44 with the aid of a sealing ring 40 and screws 41.
  • a hose 54 is connected to the connecting flange and has a suction nozzle at its other end, not shown.
  • Connected to the connection channel 32 is a pump connection channel 43 which runs parallel to the axis of rotation 47 at a distance T and continues the connection channel 42 at right angles. This has a diameter D which corresponds to the diameters B of the pump opening 30.
  • the pump connection channel 43 passes through the central body 44 up to the disk 46.
  • the distances E and F from the pump connection channel 43 and the linear channel 37 are of the same size, so that when the central body 44 rotates about the axis of rotation 47, the pump connection channel 43 can be rotated in a form-fitting manner with respect to the pump opening 30.
  • FIG. 6 shows a top view of the switching device 28 from the side opposite the bag emptying device.
  • the axis of rotation is fastened on the disk 46 by means of the screw 49.
  • the pump opening 30 is arranged parallel to the screw 49.
  • the pump opening 30 is continued by a connecting flange 32 connected to the disk 46 with screws 34.
  • the connecting flange 39 surrounding the opening 38 is at least partially visible on the circumference of the disk 46.
  • this is connected to the central body 44 with a number of screws 41, see also FIG. 5.
  • the opening 38 is continued through the connecting channel 42. This is followed by the pump connection channel 43 at right angles in the direction of the disk 46.
  • the representation of the switching device 28 according to FIG. 5 corresponds to a section along the line V-V in FIG. 6.
  • the pump connection opening 43 and pump opening 30 are arranged rotated by 90 ° with respect to the screw 49.
  • the central body is rotated in the direction 50 by 90 °, the pump connection opening 43 and pump opening 30 are connected to one another in alignment.
  • the operator After opening the housing door 2, the operator places a sack 16 filled with bulk material on the support table 4 in such a way that the sack lies transversely with respect to the direction of displacement.
  • the cutting knife 6 is set in rotation in the direction of the arrow according to FIG. 1 and the slide bar 11 is set in motion by means of the crank mechanism 12, so that the slide bar 11 lies on the sack lying in front of it on the feed surface and in the direction of the arrow to its end position moves on the swivel plates 8.
  • This is possible because a vertical slot is made in the slide bar, which allows the bar 11 to be slid over the cutting knife 6.
  • the cutting knife 6 is designed such that the apex of the cutting knife lies lower than the top 25 of the sack.
  • the sack is thus cut open on the underside and the transverse sides, but the upper side is not cut.
  • the swivel frames 17, which are located below the swivel plates 8, are swiveled towards the underside thereof, the spikes 26 fastened to the swivel frame 17 through the holes step into the swivel plates 8 and into the filled sack penetration.
  • each sack part is held by the spikes 26 and also pressed by the associated swivel plate 8 against the abutment plate 14 and each sack part is inevitably emptied by this compression.
  • the uncut upper side 25 of the sack lies around the lower edge of the abutment plate 14, so that the sack parts are fully opened at the bottom, because the transverse sides of the sack are also cut open, so that the bulk material falls into the collecting funnel 9 as a result of gravity, as by the arrows indicated in Figure 3.
  • the bulk material is then conveyed on by the screw conveyor 10.
  • the swivel plates 8 first swivel back together with the swivel frame 17 into their starting position, as indicated in FIG.
  • the swivel frame 17 swings down so far that the spikes withdraw from the holes in the swivel plate and the top of the swivel plates form a smooth surface.
  • the emptied sack then lies in the stretched position on the surface of the swivel plates 8, as shown in FIG. 4. After the sack usually comes out of one If the paper is relatively stiff, the empty sack does not collapse completely, but also has a certain height when empty.
  • roller brush 21 is rotated in the direction of the arrow according to FIG. 3 and the swivel frame 20 is pivoted downwards until the roller brush 21 is pressed onto the end of the empty sack, as shown in FIG. 4.
  • the empty sack is not only pressed flat together by the roller brush 21, but is conveyed in this flat state towards the screw housing 18, where the flattened sack enters the screw housing through the relatively narrow slot 19 and is gripped by the rotating screw conveyor and im Housing is conveyed in the same longitudinal direction.
  • the bag then gets stuck in the extension 27 of the screw housing 18 and is pressed together by the subsequent empty bags due to its friction on the wall of the extension.
  • This effect can be reinforced by the fact that the extension tapers conically.
  • the sack is not cut into two parts, but is only cut open so that the two sack parts are still connected, the risk is avoided that parts of the sack material come loose and get into the funnel together with the bulk material.
  • the empty bag is flattened so that the slot 19 in the screw housing 18 only has to have a very small height, so that the housing 18 made of sheet metal is practically not weakened and consequently during the conveyance of the empty bag cannot be deformed by the screw conveyor, so that the conveying action of the screw is guaranteed to be constant.
  • the spikes 24 provided on the roller brush capture the empty sack without delay, which would result if only the plastic bristles 23 were to act on the empty sack.
  • the plastic bristles are protected against excessive wear in this way because sliding of the plastic bristles over the empty paper bag is largely avoided.
  • the entire workflow in the device can be fully automated. This is possible in a simple manner by means of subsequent circuits.
  • the door 2 is closed. This closing process switches on the drive for the knife and sets the slide bar 11 in motion.
  • the slide bar 11 has reached its front end position, the swivel drive for the swivel frame 17 and the swivel plates 8 is started.
  • a dedusting device can be switched on.
  • the push bar 11 can be moved in again by actuating the crank mechanism 12 its starting position are retracted, furthermore, after a certain shaking movement, each swivel plate and the associated swivel frame are swiveled back into the starting position, a certain time being kept free for these processes by a time relay.
  • the drive of the roller brush 21 and the drive for swiveling the swivel frame 20 downward are actuated until the roller brush is pressed onto the empty bag. Then the bag can be removed via a time relay, after which the swivel drive for the roller brush is actuated again and the swivel frame swivels upwards and at the same time the drive of the roller brush is stopped.
  • the screw conveyor can run through the entire process.
  • Both the collecting funnel 3 and the screw conveyor 10 can be connected to a suction pump via a suction line 53 with the aid of the switching device 28.
  • the suction line and the suction pump are connected to one another by a linear channel 37 and the bulk material is sucked out of the bag emptying device.
  • a precisely defined quantity of bulk material is to be sucked off with the aid of the pump, it is possible to remove this defined amount manually from a sack in a second position of the switching device 28 with the aid of a suction nozzle connected to a hose. It is possible to switch between the first and second position of the switching device 28 by pulling on the hose connected to the switching device.
  • the rotatable central region 44 is thus pivoted through an angle of 90 ° and the hose and thus the suction nozzle are connected to the pump via the connecting duct 42 and pump connecting duct 43.
  • the sack emptying device is automatically activated by means of stops arranged radially on the circumference, e.g. via a position indicator, switched off. In other words, as long as bulk material is manually extracted from a sack using the hose, no further sacks are emptied using the swivel plates 8.
  • the central body 44 of the switching device 28 is rotated back into its other position.
  • the hose is no longer connected to the pump and by turning the stops, the position indicator restarts the bag emptying device, swivel plates, knives, etc.
  • the linear channel which is now aligned again with the pump opening 30 and the suction line opening 29, the sacks brought up by the push-over bar 11 are emptied again with the aid of the conveying screw 10 or collecting funnel 3.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Claims (13)

  1. Dispositif pour vider des sacs (16) remplis de matières en vrac, comprenant un dispositif d'amenée (12) qui transporte le sac (16) dans le dispositif, un dispositif de coupe sous la forme d'une lame circulaire (6) disposée verticalement dans la région de la surface d'amenée (5) et dont le sommet se situe au-dessous du niveau de la face supérieure (25) du sac (16), ainsi qu'un dispositif d'évacuation et une trémie de réception (9) pour les matières en vrac,
    caractérisé en ce que, dans la direction de transport du sac (16), la surface d'amenée (5) est suivie d'une table de chargement (7), la trajectoire du dispositif d'amenée (12) s'étendant jusque dans la région de la table de chargement (7) laquelle est conformée en dispositif d'évacuation constitué de deux plateaux pivotants (8) qui, à partir de la position horizontale, peuvent pivoter l'un vers l'autre vers le haut et qui sont munis de pointes (26) lesquelles sortent des plateaux pivotants (8) lors du relèvement et pénètrent dans les parties de sac, une plaque de butée (14) relevée qui soutient séparément chaque partie de sac étant disposée entre les plateaux pivotants (8), à distance verticale au-dessus de la surface de la table de chargement de telle façon que, lorsque les parties de sac sont basculées vers le haut, la face supérieure (25) non coupée du sac (16) se place autour du bord inférieur de la plaque de butée (14).
  2. Dispositif selon la revendication 1, comprenant un dispositif de transport amenant le sac vide coupé vers un compresseur de sacs vides, caractérisé en ce que le dispositif de transport est constitué par une brosse cylindrique (21) qui peut être mise en rotation et est montée sur un châssis pivotant (20) lequel, lors du pivotement vers le bas, presse la brosse cylindrique (21) sur le sac étalé sur les deux plateaux pivotants (8) ramenés dans la position horizontale, et que, vu dans la direction de transport de la brosse cylindrique (21), en aval de celle-ci, est disposé un compresseur de sacs vides sous la forme d'une transporteuse à vis sans fin placée dans un carter (18), ledit carter (18) comportant latéralement une fente d'entrée (19) pour le sac vide aplati par la brosse cylindrique (21).
  3. Dispositif selon la revendication 1, caractérisé en ce que chacun des plateaux pivotants (18) du dispositif d'évacuation présente un axe de pivotement (13) qui est déplacé vers l'extérieur au début du pivotement au moyen du dispositif de pivotement.
  4. Dispositif selon l'une des revendications 1 ou 2, caractérisé en ce que le dispositif d'amenée comprend une poutre de recouvrement (11) avec une fente pour le passage de la lame circulaire (6) pendant le déplacement du sac sur les plateaux pivotants (8).
  5. Dispositif selon la revendication 2, caractérisé en ce que la brosse cylindrique (21) comprend des poils en matière plastique (23) entre lesquels sont disposées quelques pointes métalliques (24).
  6. Dispositif selon la revendication 2, caractérisé en ce que la brosse cylindrique (21) comprend une cage métallique cylindrique, des profilés élastiques étant disposés dans le sens longitudinal de la cage métallique sur la périphérie extérieure de celle-ci.
  7. Dispositif selon l'une des revendications précédentes, sur lequel est monté un tuyau d'aspiration pour l'évacuation des matières en vrac, qui communique avec la trémie de réception, caractérisé en ce que le tuyau d'aspiration (53) communique avec une ouverture (29) d'un système de commutation (28) comportant au moins trois ouvertures (29, 30, 38), que les deux ouvertures restantes (30, 38) sont en communication avec une pompe (55 et respectivement un tuyau 54), le système de commutation (28) comportant un corps central (44) qui peut tourner au moins par rapport au tuyau d'aspiration (29) - et à l'ouverture de pompe (30), et dans lequel sont conformés des canaux (37, 42, 43) pour relier l'ouverture de pompe (30) au tuyau d'aspiration (29) - ou à l'ouverture (38) du tuyau.
  8. Dispositif selon la revendication 7, caractérisé en ce que le corps central (44) présente sensiblement une forme cylindrique et qu'il est monté de manière tournante entre deux disques coaxiaux (45, 46) par rapport à un axe de rotation (47) disposé concentriquement par rapport à son axe longitudinal.
  9. Dispositif selon l'une des revendications 7 ou 8, caractérisé en ce que les ouvertures de pompe (30) et du tuyau d'aspiration (29) sont conformées coaxialement et avec la même section transversale dans respectivement l'un des disques (46, 45) et excentrées par rapport à l'axe de rotation (47), et que la liaison entre lesdites ouvertures peut être établie par un canal linéaire (37) réalisé dans le corps central (44) et présentant la même section transversale.
  10. Dispositif selon l'une des revendications 7 à 9, caractérisé en ce que l'ouverture (38) du tuyau est ménagée dans la périphérie du corps central (44) et prolongée dans ledit corps central (44) par un canal de raccordement (42) d'extension radiale auquel fait suite un canal de raccordement de pompe (43) excentré par rapport à l'axe de rotation (47), qui présente la même section transversale que le canal linéaire (37) et s'étend à la même distance de l'axe de rotation (47) que ce dernier.
  11. Dispositif selon l'une des revendications 7 à 10, caractérisé en ce que le canal linéaire (37) et le canal de raccordement de pompe (43) sont disposés sous un angle de 90° par rapport à l'axe de rotation (47).
  12. Dispositif selon l'une des revendications 7 à 11, caractérisé en ce que, pour déterminer les deux positions d'aspiration, deux butées (51, 52) en saillie radiale sont disposées sur la périphérie (56) du corps central (44).
  13. Dispositif selon l'une des revendications 7 à 12, caractérisé en ce qu'au moins une butée (51, 52) est reliée à un répétiteur de position.
EP90107417A 1989-05-02 1990-04-19 Dispositif pour vider des sacs remplis de matières en vrac Expired - Lifetime EP0395941B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3914459A DE3914459A1 (de) 1989-05-02 1989-05-02 Vorrichtung zum entleeren von mit schuettgut gefuellten saecken
DE3914459 1989-05-02

Publications (2)

Publication Number Publication Date
EP0395941A1 EP0395941A1 (fr) 1990-11-07
EP0395941B1 true EP0395941B1 (fr) 1993-07-07

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ID=6379919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90107417A Expired - Lifetime EP0395941B1 (fr) 1989-05-02 1990-04-19 Dispositif pour vider des sacs remplis de matières en vrac

Country Status (6)

Country Link
US (1) US5056980A (fr)
EP (1) EP0395941B1 (fr)
JP (1) JPH089385B2 (fr)
CA (1) CA2015726C (fr)
DE (2) DE3914459A1 (fr)
ES (1) ES2043168T3 (fr)

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FR2586241B1 (fr) * 1985-08-14 1987-12-04 Chasseray Yves Procede et dispositif pour ouvrir par la zone mediane de leur corps, vider et aplatir des recipients metalliques ou composites hermetiquement fermes
SE451450B (sv) * 1986-07-28 1987-10-12 Tomas Borglund Sett och anordning for tomning av forpackningar, serskilt seckar

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DE59001901D1 (de) 1993-08-12
ES2043168T3 (es) 1993-12-16
US5056980A (en) 1991-10-15
EP0395941A1 (fr) 1990-11-07
DE3914459A1 (de) 1990-11-08
JPH0369429A (ja) 1991-03-25
CA2015726C (fr) 1993-07-20
JPH089385B2 (ja) 1996-01-31
CA2015726A1 (fr) 1990-11-02

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