DE3220780A1 - DEVICE FOR FILLING BAGS WITH FLOW OR GIANT-SHAPED, PARTICULARLY DUST-SHAPED FILLING MATERIAL - Google Patents

Description

322078Φ

PATENT ADVOCATE DR, HANS-GUNTHER EGGERT, DIPLOMA CHEMIST

S COLOGNE 41, Räderscheidtstr. 1

- 3 - ■ ■ ' Description

The present invention relates to a device for filling sacks with flowable or pourable, in particular powdery filling material, for example for full automatic filling of flat and gusseted bagsi

made of paper, plastic or a combination of these materials, the bags being held by means of clamping jaws of the lateral bag mouth areas to the filler neck and positioned there through between the clamping jaws The sacks can be opened by moving the clamping jaws against each other.

For filling sacks, devices are known in which the sack is opened by hand and placed on the filler neck and then clamped and sealed by means of a mechanical or electro-pneumatic bag clamp got to.

It is also known to provide the filler neck at its lower end with an inflatable cuff which in the inflated state the opening between the filler neck and seals the sack pushed onto it.

The ratio between the cuff outside diameter and. The inside diameter of the bag is determined by the inflation capacity of the cuff. If the cuff outer diameter only slightly made smaller than the inner diameter of the 'bag, there is the case of automatic sliding of the sack on the filling spout the risk that the bag edge turns. The sacks are therefore pushed open by hand. It is true that the disadvantage of the possible turning over of the sack edge can largely be avoided by choosing the outside diameter of the sleeve to be considerably smaller than the inside diameter of the sack. However, such a reduction in the outer diameter of the cuff would also result in the cross section of the filler neck

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reduced accordingly and thereby adversely affect the filling speeds, quite apart from the fact that under certain circumstances a secure seal between the cuff and the sack could no longer be guaranteed.

From DE-GM 78 24 437 a device is known in which a seal between the filler neck and bag by means of movable plates and a rubber belt is accomplished. However, this device is very complicated and laborious.

From DE-OS 15 86 248 and DE-OS 24 18 228 one knows also devices in which the sack is swiveled up to rest on the filler neck and the sack edge is spreadable Clamping jaws is held. A complete sealing of the bag edge is not guaranteed in this case.

This is also the case with a device known from DE-PS 2 629 065 in which guide flaps are lowered into the edge of the sack and are spread, there is no complete seal, so that when filling the corresponding products affects the environment, for example polluting the environment with dust when filling dusty products and, if necessary, the operating personnel is harassed.

The object of the present invention is to avoid the disadvantages of the known devices and to make them simple to create a mechanical, preferably fully automatic device in which a perfect seal is made during the filling process, so that even when filling sacks for example with dusty, with protection gas-treated or odor-prone material is a nuisance the environment is safely avoided.

According to the invention, this is done in a device with devices for holding, transporting and opening the Sack reached by expandable flaps that can be lowered into the area of the opened sack edge and a Surrounding filler neck, telescopically displaceable on the filler neck and in the extended position opposite This is arranged in a sealed manner and can be lowered into the sack edge area between the spread flaps, at his lower end provided with an inflatable ring on the outside. .

Instead of lowering the shaped flaps into the sack edge area, provision could of course also be made for the sack in a corresponding way and then the form

fold apart. In one as in the other ' Trap is by retracting the unspread mold flaps in the known manner by clamping the edge of the bag is held and opened with suction cups, that the edge of the bag cannot be turned over and that the area of the edge of the bag is shaped without creases is achieved according to the cross section of the filling or sealing nozzle, these preferably circular Have cross-section and formed accordingly the shaped flaps as semicircular shell segments will.

In an advantageous manner, it is preferably made of sheet metal, which is optionally surface-treated, plastic or the like produced dimensionally stable molded flaps possible, the outer dimensions of the sealing nozzle or the to be formed on this arranged inflation ring only slightly smaller than the internal dimensions of the spread Form flaps or the sack, so that on the one hand the largest possible filling cross-section of the filling or sealing nozzle can be realized and on the other hand a secure seal is guaranteed.

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To improve the sealing effect is provided in a further expedient embodiment of the invention, in the area of ' To arrange the bag edge sealing segments on the outside, for example a solid and stable outer ring, against that by the inflation ring after being acted upon by a Pressure medium is pressed against the sack. Instead of placing an inflatable cuff on the sealing nozzle, you could this can also be provided on the outer ring or both on the sealing stub and on the outer ring.

Further advantageous embodiments of the invention result from the subclaims and the following description of a shown schematically in the drawing , Execution game. Show it

Figure 1 is a view of the filling device in the basic position in section,
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[2 ^r - Figure 2 is a sectional view of the filling device with the bag open, lowered and spread flaps,

Figure 3 is a sectional view of the device in the filling ; 25 lung position,

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Figure 4 is a sectional view of the device in the air suction position,

Figure 5 is a side view of the jaws with clamped | ,, tem suction pipe,

Figure 6 is a plan view of Figure 5,
Figure 7 shows a section along the line AB of Figure 3 and

FIG. 8 again in a sectional view an embodiment with a protective tube surrounding the suction tube.

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j According to Figure 1 is on the filler neck 1 of the actuator or the like 8 telescopically displaceable!

ordered sealing stub 2 arranged. At the ring collar formed lower end of the filler neck, the elastic seal 3 is arranged and at the upper end of the Sealing stub the stop ring 4 is provided, which also or instead of the seal 3 as an elastic seal could be trained. With 5 arranged on the lower end of the sealing nozzle inflation ring is referred to, which is to be connected to a compressed air source, not shown. They can be swiveled below the filler neck arranged flaps 6 are provided, the actuation of which takes place via the actuator or the like 7. The bag 15 is still closed between the to Inner sides of the preferably reaching over the largest part of the bag width and by means of the actuators or like 13 actuatable transport clamps 12 arranged supports 14 held from elastic material.

11 denotes the suction cups for opening the sack 15 and 9 that passed through the filler neck 1 and can be lowered and raised by means of the actuator or the like 10 arranged suction pipe 9.

The clamped between the transport clamps 12 with support 14 Sack 15 was here automatically transported to the filling device and in this position to the side Terminals 17 (Figure 7) have been transferred. With the closing of the clamps 17, the suction cups 11 are attached to the Bag side wall put on and after opening the transport clamps 12 switched on via the actuators or the like 13, the suction air. An actuator, not shown or the like moves the clamps 17 towards one another, while in a corresponding manner at the same time the Remove the suction cups 11 from one another and open the sack 15.

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In the so opened bag 15 are via the actuator 7, As shown in Figure 2, the flaps 6 have been pivoted into the sack edge area and spread apart, so that the sack edge area has an opening cross section corresponding to the formation of the shaped flaps. In this The suction air for the suction device 11 can now be switched off and the sealing nozzle 2 in the area of the spread stage Mold flaps 6 are lowered, the stop ring 4 of the sealing connector 2 in the lower end position is pressed onto the elastic sealing ring 3 of the filler neck 1 and thereby filler neck 1 and sealing neck 2 are tightly connected to each other.

As shown in FIG. 3, the flaps 6 are then removed from the side clamps 17 in the spread position The bag edge area, which was still held and thus prevented from collapsing, was moved upwards. As soon the flaps emerge from the sack edge area, the inflation ring 5 is acted upon with compressed air and thereby the bag 15 is completely sealed from the inside. At the same time, the bag outer wall is pressed against the outer segments 16 (Figure 7) and thus the bag is also kept tight from the outside. The filling of the Sack 15 with one: previously determined product quantity.

After completion of the filling process, the suction pipe 9 is over the actuator 10 to the position shown in Figure 4, i.

introduced into the upper edge of the bag. The sealing stub 2 is now raised by the actuator 8 and off moved out of the sack edge area, tightened the sack edge area by moving the side small pieces 17 apart and by moving the transport clamps 12 together, the sack edge area pinched by doses again, with the

elastic covering 14 of the transport clamps the suction pipe 9! encloses and hermetically seals to the outside, so that I!

no more air can get into the bag from outside! !

I (Figures 5 and 6). The j As shown in FIG. 6, part of the suction pipe 9 is preferably designed with an oval cross-section. Instead of this, a flat, slit-shaped one could of course also be used Cross-section can be provided or it could in the direction of the sack edge, one behind the other, a larger number of correspondingly small circular suction openings be provided, with an overstretching in each case of the sack material avoided and a wrinkle-free return of the sack edge area into a stretched position is ensured. In the case of filling with dusty As indicated in FIG. 5, it is recommended to fill the product with a sieve, a filter, at the lower end of the suction pipe 9 or the like to be provided.

After the air trapped in the upper part of the sack 15 has been sucked off for an adjustable time, is before moving the suction pipe 9 out of the bag edge area the vacuum line closed by means of a valve, not shown, and for the purpose of freeing the intake manifold mouth A short compressed air pulse is sent through the suction tube from any product adhering to it.

Even while the suction pipe 9 is in the area of the transport clamp 12 leaves, the elastic material seals the pads 14 the edge of the sack immediately behind the end of the suction pipe wrinkle-free, so that no more air can enter the Can reach the product. Is the suction tube in its upper Arrived at the end position or sufficiently far out of the sack edge When the area is moved out, the shaped flaps 6 ′ are closed, whereby they take into account the cross section of the filler neck 1 cover each other tightly and thus prevent

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that possibly trickling down filling material gets between the bag walls in the bag edge area and thereby the subsequent closing of the sack in a subsequent closing station or by an approachable one Affect the locking device. In this sense, it can also prove useful in the bag edge area Provide retractable expansion elements such as wedges or the like above the transport clamps 12, which spreads this part of the sack edge area apart and makes it possible, for example by blowing it out by means of a powerful compressed air pulse to free this area of any filling material. 15th

It goes without saying that the device according to the invention can be changed in many ways without departing from the idea of the invention to deviate. For example, the suction pipe 9 does not necessarily need to pass through the filler neck 1 be arranged throughout, rather this could

can also be provided in a subsequent position for the purpose of a possible increase in the performance of the device. As shown in FIG. 8, the suction tube 9 can also be surrounded by a protective tube 18, 25 which can be displaced by means of an actuator 19 and which prevents any filling material adhering to it from soiling the bag inner wall in the area of the bag edge when the suction tube is moved out subsequent closing is adversely affected by welding, for example.
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j Instead of just a single suction pipe, their! several provided in a correspondingly favorable arrangement j and the shaping S of the sack edge area by means of the flaps 6 could also be closed, for example ; 35 at an earlier point in time, for example during the delivery of the

Sack 15 to the filling station, and possibly to another ! Place.

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The reversal of some motion sequences has already been mentioned here conceivable or the use of other corresponding known technical elements to bring about of the intended purpose conceivable within the scope of the invention.

L e r s e i t e

Claims (8)

PATENT ADVOCATE DR. HANS-GÜNTHER EGGERT, DIPLOMA CHEMIST 5 COLOGNE 41, Räderscheidtstr. 1 Cologne, June 1, 1982 No. 29 "FIX" Peter Steimel KG _r Scales and mechanical engineering, Bonner Strasse 22, 5202 Hennef Sieg 1 Device for filling sacks with flowing or giant L- shaped, in particular dust-like, filling material Claims Device for filling sacks with flowing or Vw / giant-shaped, in particular dust-shaped, contents, with devices for holding, transporting and opening the sack, characterized by in the area the opened sack edge lowerable, expandable flaps (6) and a filler neck (1) surrounding, telescopic on the filler neck displaceable and arranged in the extended position in a sealed manner with respect to this, between the Spread flaps can be lowered into the sack edge area, at its lower end with an outside arranged inflation ring (5) provided sealing nozzle (2). . 2. Apparatus according to claim 1, characterized by Outside sealing segments (16) arranged at the level of the bag edge area. 3. Apparatus according to claim 1 or 2, characterized by a retractable into the bag edge area in Longitudinally displaceable suction pipe (9) and an external elastic seal (14) arranged in the sack edge area. ■ «« ■■■ - »■» »·" »" 4. Apparatus according to claim 3, characterized in that that the suction tube (9) from one opposite this 5 is surrounded by a relatively displaceable protective tube (18). 5. Apparatus according to claim 3 or 4, characterized in that that the suction tube (9) and the protective tube (18) 10 have a flat, preferably oval cross-sectional shape and the elastic seal (14) is designed as a flat seal. . 6. Device according to one of claims 3 to 5, characterized 15 characterized in that the suction pipe (9) is passed through the nozzle j (1). 7. Device according to one of claims 1 to 6, characterized in that the shaped flaps (6) as in un- 0 spread together the filling cross-section Covering tightly closing shells are formed. ! 8. Device according to one of claims 1 to 7, characterized 25 * marked that in the bag mouth area in this retractable expanding elements, for example expanding wedges, expanding flaps or the like are arranged j are.