DE2519852C2 - Machine for packing bulk goods in bags or the like - Google Patents

Description

The invention relates to ats / a machine for Packing bulk goods ii. Sacks or the like according to the preamble of claim 1 above.

A machine of this type is known (DE-OS 20 49 778), in which a motor-driven conveyor device drivable roller is provided, which has a vertical movable carriage in the area of the front pressure rod can be moved to the outside Sack section hanging down via the front pressure rod into the room by frictional engagement to be transported between the pressure rods and below the filler neck. The role becomes the Sack section hanging down over the front pressure rod upwards in the direction of the filler neck conveyed in the form of a loop, the loop being larger, the stiffer the one attached to the filler neck Sack is. There is a risk that the loop with the The filler neck collides and the sack receives further deformations that prevent the subsequent filling of the Affect the sack or make it impossible.

In the known machine, the open position of the front pressure rod and the lower Operating position of the drivable roller can be precisely coordinated with one another through a narrow tolerance of the guide means. In addition, there is the considerable design effort for guiding and driving the Carriage that carries the roller with its drive, and the one required for these parts of the conveyor Space requirement by which a short stroke of the bag feeder, which is necessary for a high filling capacity, is prevented.

It is also known (DE-OS 15 86 248), one in a machine for making and filling sacks To use a rocker arm driven by a crank mechanism, by a supply roll with a large Weight of the withdrawal made of the tubular film will. The crank mechanism requires a for the film take-off Rotation of 180 °. During this film withdrawal, the filling is carried out that is fixed on the filler neck Sack.

S This machine does not have a conveyor device for partially or fully conveying the outside the sack section hanging down the front pressure rod in the area between the pressure rods below the filler neck. When opening the FOlI- Stutzens is made by the filling material flowing into the sack the sack pulled over the front pressure rod. For this it is necessary that the sack has a sufficient Flexibility and the product has a sufficiently large specific weight

The invention is based on the object of designing a machine of the type mentioned at the outset in such a way that that a trouble-free operation of the machine when using bags of great rigidity or of Bulk material with a low specific weight and a

ίο good filling performance of the machine is guaranteed.

This object is achieved according to the invention in that the conveying device consists of one from above there is movable plunger between the open pressure rods

After the bag has been placed on the filler neck, the bag extends from the filler neck to the front Andrücksiab and hangs from this outside down. The sack is then partially or wholly in the area below the FOlI-

Nozzle and promoted between the pressure rods

If the sack is not completely separated from the pressure rod by the ram, the sack forms below the filler neck and opposite the aforementioned pressure rod is such a large loop that the

flowing into the sack when the filler neck is opened Filling material pulls the sack completely over the pressure rod

Since very little time is required for the back and forth stroke of the ram, the performance of the Machine is not degraded by the arrangement of the ram

The functional reliability of the machine is considerably increased by the ram, as it is at the filler neck not just plastic bags or bags with high Flexibility, but also relatively stiff gusseted bags and paper sacks or bags can be put on. Furthermore, the specific weight of the product is important for the Perfect working of the machine is no longer important.

5 »Since the working stroke of the ram is from above between the is guided open pressure rods, the sack section hanging down over the front pressure rod is down from the front pressure rod, that is Moved in the filling direction Here a filling of the Sack impairing deformation of the sack avoided When arranging the plunger no tight tolerances need to be observed, since the The plunger is only in the area between the filler neck and the front pressure rod in its open position

to be retracted on the working stroke because the ram is with its drive can be arranged to save space, the mechanical sack feeder with a short stroke work.

An embodiment of the invention is in

fts drawing shown. This drawing shows schematically a machine for packing bulk goods in Sacks or the like, in which the sacks are made from a tubular film that is pulled off a roll 1.

25 IS

The film is drawn off via driven take-off rollers 2, 3 whose speed can be regulated with a drive (not shown) arranged deflection rollers 4, 5, a limited film supply is formed, which in an intermittent Foil transport is required The transport of the film web takes place via a transport roller 6, the one Pressure roller 7 is assigned

A welding device 8 is provided for swiveling the respective ground level, below which a cutting device 9 is arranged. The individual sacks 10 are moved by a conveyor 11 in the direction of the filling spout 12. through which they are opened. The suction strips transport the sack further in the direction of the filling nozzle 12. The sack is taken over from the suction strips by spreading fingers 15, which are inserted into the opening corners and place the sack on the filler neck. The upper edges of the sack are fixed on the filling stool via the clamping jaws 16, which are shown in the opening position in the drawing. After the sack is clamped to the filler neck, the pressure rods 17, 18 located below the filler neck assume the position shown in the drawing, so that the sack extends from the filler neck over the pressure rod 18 and hangs down from this pressure rod.

A pneumatic cylinder 21 is attached to a stationary part 19 of the filler neck via a console 20 via which a plunger 22 is driven. About the plunger 22, the lower end position of which is dash-dotted is indicated, the sack is pulled over the pressure rod 18 in the area below the filler neck and forms the loop indicated by dash-dotted lines. In the exemplary embodiment, the sack is lifted over the ram 22 partially drawn into the area below the filler neck 12. There is the possibility of adjusting the ram stroke like this to interpret that the sack completely through the pestle is conveyed into the area below the filler neck and is released from the pressure rod 18 in the process

The filled sack is closed via a conveyor 23 a not shown Versehiic3str, tion transported

1 sheet of drawings

Claims (2)

Patent claims: 1. Machine for packing bulk goods in sacks or the like with a filler neck, clamping jaws to fix the edges of the bags on the filler neck and arranged below the filler neck, in a opening and a pressing position movable pressure rods, whereby the sack placed on the filling nozzle is removed from the filling nozzle via a pressure rod runs and hangs down from this and on the frame of the machine adjacent to the filler neck a conveying device provided with a control device, assigned to the open pressure rods, for partial or complete conveying of the sack section hanging down on the outside over the front pressure rod in the area between the pressure rods is arranged below the filler neck, characterized in that the conveying device consists of one of there is a movable plunger (22) at the top between the open pressure rods (17, 18) 2. Machine according to claim 1, characterized in that the plunger (22) can be driven via a pneumatic cylinder (21) which is at the extension end of the ram via a console (20) on a stationary part (19) of the Füllsmtzens (12) is.