EP0819633A2 - Device for separating articles from piles of horizontally lying sacks - Google Patents

Abstract

The device (1) comprises a machine frame with side parts (3), on the insides of which profiled guide tracks (6,7) for the revolving rollers (8) are fixed via holding pieces (4,5). The two parallel guide tracks comprise upper and lower parallel sections, which are joined to one another by somewhat semi-circular sections. The rollers (8) arranged in the guide tracks are parallel to one another and equally spaced apart. At their ends, the rollers are fixed to endless chains or tractive components, which run in guides and are activated by a drive. The rollers consist of cylindrical tube pieces, which are freely rotatable on shafts, the shaft pins of which are fixed to the chains or tractive components.

Description

The invention relates to a device for separating stacks from flat-lying Sacks with bottoms folded into the sack level.

To produce sacks from preferably multi-ply paper, first of all In a so-called tube drawing machine, tube sections are produced which are stacked in between will. These tube section packages are then usually separated by so-called rotary feeders and individually one after the other to so-called floor feeders laid out on both sides of the bags at high speed So-called cross bases are formed, one in each of the cross bases tubular filling valve inserted and the bottoms by glued-on bottom cover sheets be fixed or closed. The cross-bottom bags are also used in the floor layers produced at such a high speed that the one sticking to the floors The adhesive has not yet set after the bags have been ejected from the floor layer Has. For this reason, it is fundamentally necessary to use the bags produced temporarily store in loose stacks to allow the adhesive to set and to prevent it from being pressed immediately by the bags or Sack stack in the formation of shipping units for undesirable gluing is coming.

The object of the invention is therefore a device of the type specified to create, with which the stacks formed immediately after the sack production separate from flat-lying sacks and combine them into units ready for dispatch to let.

According to the invention, this object is achieved by a device for separating Stacking of flat-lying sacks with the floors folded into the sack level with the Features of claim 1 solved.

The conveyor advantageously consists of at least two parallel to one another revolving endless conveyor belts running at different speeds are drivable. The speeds of each are Conveyor belts are coordinated so that the Side edges of the bags that are thrown onto these in an inclined position parallel to the conveying direction be aligned.

Are the sack stacks formed immediately after the sack production with the invention Device again isolated, with this isolation any The sacks are stuck together and the sacks become too large storable and transportable units combined, the scale belt rolls directly via simple unwinding devices with filling machines Connection can be made that the bags are filled individually can be removed from the scale and thereby expensive separating devices be avoided.

It is known to use rotary feeders for separating sack stacks, as for example for the separation of the hose section packages at Sack production for placing the isolated hose sections on the floor layer be used. Such a known, for example from DE-C-12 77 655 Rotary feeders are relatively expensive, so farms that have stacked paper bags fill with bulk goods, the purchase of which shy away. Rotary feeder are not only associated with high acquisition costs, they are also only suitable bad for separating sack stacks because the bottoms of the sacks in the sack stacks tend to stand up more or less so that a safe suction of the individual bags is not guaranteed with certainty by the rotating suction rolls and there is congestion and consequent business interruptions can come.

The device according to the invention consists of the combination of one in the Pre-published DE-A-195 29 935 described separation device with a known device for producing scale tape rolls, as they has been described for example in DE-A-25 44 135 and EP-B-00 54 735.

The separation device used according to the invention ensures the separation of the individual sacks also from a loose stack of sacks and even if the individual sacks are not yet at the time of stacking completely set adhesive should be glued together. Through the Separating the sacks out of the sack stacks becomes undesirable Adhesions loosened and the sacks become easy-to-use scale tape rolls from which they are easily separated by sack fillers and can be applied to the bag filling devices.

Fig. 1

eine Seitenansicht der Vorrichtung zum Vereinzeln von Stapeln und zum Aufwickeln der vereinzelten Säcke zu einer Schuppenbandrolle,

Fig. 2

eine vergrößerte Darstellung der Vereinzelungsvorrichtung nach Fig. 1 und

Fig. 3

einen Schnitt durch die Vereinzelungsvorrichtung längs der Linie III-III in Fig. 2.

An embodiment of the invention is explained below with reference to the drawing. In this shows

Fig. 1

2 shows a side view of the device for separating stacks and for winding up the separated bags into a roll of scale tape,

Fig. 2

an enlarged view of the separating device according to Fig. 1 and

Fig. 3

a section through the separating device along the line III-III in Fig. 2nd

The separating device 1 consists of a machine frame with the side parts 2, 3, on the inside of them via holding pieces 4, 5 guideways consisting of profiles 6, 7 for rollers 8 rotating on these. The two Guideways 6, 7 arranged parallel to one another each consist of upper ones and lower parallel sections, which are approximately semicircular Sections are interconnected. The on the guideways 6, 7 guided rollers 8 arranged parallel to one another at equal intervals are attached at their ends to endless chains or traction elements, which are not shown in Guides run and are driven by drives, not shown. The rollers 8 consist of cylindrical tube pieces that are freely rotatable on axes are stored, the axle journals 10 on which they move over the guideways 6, 7 Chains or traction elements are attached.

Those rotating over the guideways 6, 7 on endless chains or traction means With their upper run 11, rollers form a moving roller grate, above a cassette 12 forming a stacking magazine is held in the side parts 2, 3 is, which is used to hold stacked paper bags 13, which after their separation brought into a shingled formation and then closed Scale tape rolls are wound up. The cassette 12 has four side walls, at least one side wall 14 in the direction of the double arrow through a manually operated spindle drive to different sack formats is adjustable. The bottom of the stacking cassette 12 is through the upper strand 11 of the migrating roller grate.

Below the upper run 11 moving roller grate is between this and the Below a conveyor belt 16 is arranged, which consist of parallel to each other Suction belt conveyors 17, 18. The conveyor belt 16 runs at a right angle the direction of travel of the moving roller grate.

The front deflection rollers 20 of the two suction belt conveyors running in parallel next to one another 17, 18 are mounted on brackets 21 which are attached to the side frame 2 are. The endless conveyor belts 17, 18 pass through a rectangular window-like Cutout 22 of the side frame and run over the delivery ends forming driven pulleys 23, 24, which in a manner not shown in Machine frame are stored. The driven deflection rollers 23, 24 are driven by controlled geared motors at different speeds.

The endless conveyor belts 17 provided with corresponding rows of perforations, 18 run over suction boxes 25, 26, which are not shown on the side parts 2, 3 are fastened and extend at least over the length of the stacking cassette 12 extend below this in the manner shown in the drawing.

The moving roller grate moves in the direction of arrow A under the stacking cassette 12 through. Plate-shaped, opposite side walls of the Stack cassette-bearing plates 30, 31 are on their underside with the friction increasing Provide pads 32 to which the lateral end portions of the freely rotatable, Roll sleeves consisting of pipe sections of the rolls 8 during their passage be pressed under the cassette so that it rotates with which they can be seen in FIG. 3 in each case on the Support the lowest sack stacked in the cassette 12.

Each time a roller 8 runs under the cassette 12, two on the side 3 on the left end region of the cassette shown in FIG. 3 and lifted and lowerable sucker 35 the lower front side edge 36 of the bottom stacked Sackes, which is the representation of FIG. 3 on the left, and pull it behind after the roller 8 just passed and before the trailing roller 8 below, so that the subsequent roller 8 in the wedge-shaped gap between the pulled down front end of the sack and the end area thereby exposed of the next following sack runs in, that then by the clock in and moved vacuum cleaner is pulled down in a corresponding manner.

The type of peeling of the bottom sack from the stacking cassette and the The drive of the liftable and lowerable suction cup basically corresponds to the illustration and description in DE-27 32 591 C2, to which reference is made for a more detailed description becomes. The suction cups 35 are also described in DE-27 32 591 C2 Way connected to suction air sources, which the vacuum cleaner 35 with in time Supply suction air.

The successively from below from the stack held in the cassette 12 isolated bags hit after pulling them off in the manner shown in Fig. 3 first with its first edge removed on the suction belt 17, while the part still adhering to the stack through the continuous rollers 8 of the migrating Roller grate is increasingly peeled off the stack until too the opposite side completely falls on the other suction belt 18. Which default of this type of filing of the successively filed Workpieces are created by the different speeds of the suction belt conveyors 17, 18 balanced, of which the suction belt conveyor 17 at a lower speed is driven as the suction belt conveyor 18. The speed of the two Suction belt conveyor 17, 18 is adjustable via separately controllable geared motors.

To control the geared motors, a computer is provided, which has sensors the position of the hose sections thrown onto the suction belt conveyors 17, 18 is detected and the geared motors in such a way according to a possibly found skew controls that a delay due to the different speeds of the suction belt conveyor is balanced. Of course, the speed of the Suction belt conveyors can also be made by hand after visual assessment. Because of the type of arrangement of the geared motors and their control is closer Illustration referred to DE-A-195 39 935.

The sacks placed on top of one another on the conveyor belts 17, 18 are stacked Then run from these in scale formation on the subsequent conveyor belt 40, which is arranged fixed to the frame in a manner not shown. The crowd of endless Conveyor belts of the conveyor belt 40 runs over the front deflection roller 41 driven by a gear motor 42 through endless belts or chains 43. Drawn from two rollers 45 placed side by side in racks and parallel Retaining straps 46 extending to one another are guided via guide devices 47 and then run over the rear guide roller 40 under the scaled one above the other Bags 13 on the second conveyor belt 40.

Above the second conveyor belt 40 there is a swiveling one Frame 48 held winding core 49 on which the overlapping the scaled Bags 13 are wound into a scale roll 50. To wind up the the winding core becomes shingled bags lying one above the other to form the scale belt roll 50 49 or the scale band roll forming on this one of not shown drive driven at a speed that of the conveyor belt 40 corresponds to. The winding core 49 or the forming scale roll 50 is with the necessary pressure against those to be wound up, scaled one above the other Sacks pressed. This pressure is from a controlled pressure medium piston-cylinder unit 41 generated, the cylinder on the frame and their Piston rod is hinged to the swivel frame 48. The pressure medium piston cylinder unit 51 pivots according to the growing diameter the scale belt roll 50 the swivel frame 48 to the right.

The holding tapes 46 are on the winding core 49 at the beginning of the winding process attached so that they overlap when winding the scales Sacks to the scale belt roll 50 holding from the outside over the scaled Place bags 13 on top of each other. Once the scale tape roll 50 has been wrapped, the straps are cut and their ends on the scale tape roll set so that the scale tape roll with the winding core from the frame 48th removed and a new core for winding the next roll of scale tape can be inserted.

Devices for winding up flaked objects to scale tape rolls are themselves from DE-A-25 44 135 and EP-B-00 54 735 known, on the scale to show a device for winding sacks placed one above the other are referred to a scale tape roll becomes.

Claims (2)

Device for separating stacks of flat-lying sacks with bottoms folded into the sack level, with a stacking magazine, the base of which supports the stack and consists of continuous rollers of an endless, moving roller grating that roll on the bottom workpiece, the rollers of which are moved in a rotating manner, with a conveyor arranged under the upper run of the roller grate and running at an angle to the roller grate, onto which the bottom sack, peeled off from the stack by a continuous roller, is thrown and which aligns the side edges of each sack parallel to the conveying direction, with one in the rhythm of the passage of the rollers between these grippers, which pulls down one side edge of the bottom sack between two rollers in such a way that the leading roller still supports the stack over the sack and the trailing roller runs between the sack and the sack above it and safely separates the bottom sack from the stack, with a winding core mounted in the machine frame, provided with a drive or a scale tape roll wound thereon, which can be adjusted to the conveying device or a subsequent conveying device, and with at least one holding belt drawn off from a supply roll, which, when the shingled sacks thrown one above the other onto the parallel first conveyor belts, are stretched to form a scale belt roll holding them from the outside. Apparatus according to claim 1, characterized in that the under Conveyor device arranged at the top of the roller grate from at least consists of two endless conveyor belts running parallel to each other can be driven at different speeds.

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