JPH1072132A - Device for separating stack of flat bag having bottom part folded inside surface of bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To complete a bag as a standardized article which can be shipped, by again separating a stack of the flat bag formed just after its manufacture. SOLUTION: This device comprises a stack magazine rolling a floor of the magazine supporting a stack into contact with a workpiece in the lowermost position to be formed by a continuous roller of endlessly turning roller lattice, a conveyer arranged under an upper part stringer of the roller lattice to extend at an angle relating to the roller lattice and to throw down thereon a bag 13 in the lowermost position at each separation from the stack by the continuous roller to straighten a side edge of each bag in parallel to a conveying direction and a suction device for drawing a side edge of the bag of the lowermost position at each time into the two rollers, which is clamped between the rollers and synchronized with rolling of the roller. A winding core 49 supported to a machine frame and provided with a drive mechanism is adapted to the conveyed bag piled in scale shape. A holding belt 46 pulled by a storage roller and is held onto the roll from the outside at the time of winding a bag thrown down to be piled in scale shape, to a scale-shaped belt roll 50.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to an apparatus for separating a stack of flat bags having a folded bottom in the plane of the bag.

[0002]

2. Description of the Prior Art In order to produce bags, preferably from multilayer paper, firstly tubular segments are produced in a so-called tubular material stretching machine. Thereafter, the packets of this tubular segment are usually separated again by a so-called rotary feeder and successively one by one a so-called bottom stacker.
(bondenleger) where the so-called joint bottoms (Kreizboden) are formed in the bag material from both sides at a higher speed, a tubular bag-filling valve is inserted into each of the joint bottoms, and the bottom is covered with a bottom cover. It is fixed or closed by bonding paper. Even in the bottom stacker, bags with block bottoms are manufactured at high speed, so that the adhesive that adheres to the bottom has not yet solidified after the bags have been discharged from the bottom stacker. For this reason, the manufacturing process is used to harden the adhesive and to prevent the inadvertent bonding from occurring by immediately compressing the bags or stacks of bags produced in the production of standard products that can be shipped. It is basically necessary to temporarily store the emptied bags as loosely stacked stacks.

[0003]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a flat bag stack which is formed immediately after the bag is manufactured, so that the stack can be separated again and assembled into a standard product for shipment. To manufacture different types of equipment.

[0004]

According to the present invention, the above objects have the features as set forth in claim 1.
The problem is solved by an apparatus for separating a stack of flat bags having a folded bottom in the bag surface.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The transport device preferably comprises at least two endless conveyor belts circulating parallel to each other, which can be driven at different speeds. The speeds of the individual conveyor belts making up the conveyor are coordinated with one another such that the side edges of the bags dropped on the conveyor belt in an oblique position are aligned parallel to the conveying direction. If the stack of bags formed immediately after the production of the bags is separated again by the device according to the invention, any possible cohesion between the bags will be separated again by such separation and the bags will be stored,
Or it is put together in a large number of standard products that can be shipped. At that time, the bags are separated one by one from the scale for bagging, thereby eliminating the need for expensive separation equipment.
A simple scaly band roll directly above the winding device can be linked to the filling device.

[0006] A rotary feeder such as is also used to separate a stack of bags, for example to feed the separated tubular segments to a bottom stacker, and to separate packets of tubular segments during bag manufacture. The use of is known. For example, such a rotary feeder known from DE-C-1277655 is relatively expensive,
It is hesitant to introduce equipment for filling the deposited paper bags with the infusate. Rotary feeders are not only limited by the high equipment costs, but also tend to stand up to varying degrees at the bottom of the bags in the bag stack, so that the rotating suction rollers ensure that each bag is suctioned. It is not well-suited for separating bag stacks, because it can stagnate without being secured and thus stop operation. The device according to the invention comprises a separating device as described in the unpublished DE-A-195 29 935, for example DE-A-254.
4135 and EP-B-0054735 in combination with a known scaly band roll manufacturing apparatus.

[0007] The separating device used in accordance with the present invention allows the loose bags to be stuck together, even from loosely stacked bag stacks, because the adhesive is not completely solidified at the time of lamination. Even in this case, individual bags can be reliably separated. Thus, by separating the bag from the bag stack, the problem of undesired sticking is solved and the bag is wound into a scale-like roll that is easy to handle, from which the bag can be easily separated by bagging operations and bagged. Can be sent to the device.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. The separating device 1 is composed of a machine frame having sides 2 and 3, inside which guide surfaces 6 and 7 formed by vertical members for rollers 8 rolling on guide surfaces via holding members 4 and 5. Has been fixed. The two guide surfaces 6, 7 arranged parallel to each other extend parallel to each other and are interconnected with a substantially semicircular part and comprise upper and lower parts. The rollers 8 guided on the guide surfaces 6 and 7 and arranged at equal intervals in parallel to each other, at their ends, move on the guide surfaces (not shown) and are driven by a drive mechanism (not shown). The endless chain is fixed to a pulling mechanism. The roller 8 is made of a cylindrical tube material rotatably supported on a shaft.
7 is fixed to the chain or the pulling mechanism that moves on.

The rollers rolling on the guide surfaces 6, 7 by means of an endless chain or a pulling mechanism form a roller grid which circulates with its upper stringer 11, above which a cassette 12 forming a stack magazine is laterally mounted. This cassette is fixed to a few, and this cassette serves to accommodate the piled paper bags 13, which are separated in a scale-like configuration after being separated and subsequently wound as a scale-shaped band roll. You. The cassette 12 has four side walls, at least one side wall 14 of which can be adjusted for bags of different formats by a worm drive which can be manually operated in the direction of the double arrow. Stack cassette 12
Is constituted by an upper stringer 11 of a circulating roller grid. Above the upper stringer 11 of the circulating roller grid, a suction conveyor belt 17, extending parallel to each other between the roller grid and the lower stringer,
A conveyor belt 16 comprising 18 is provided.
The conveyor belt 16 extends at right angles to the running direction of the circulating roller grid.

The front guide rollers 20 of the suction conveyor belts 17, 18 running parallel to each other are supported on a console 21 fixed to the side frame 2. The endless conveyor belts 17, 18 pass through a rectangular window-shaped cutout 22 in the side frame and are supported (not shown) on the machine frame by a driven guide roller 23 forming a discharge end. , 24. Driven guide roller 2
3, 24 are driven at different speeds by controlled drive motors. Endless conveyor belts 17, 18 with a suitable array of holes are secured to the side walls 2, 3 (as not shown) and are shown below the cassettes at least over the length of the stack cassette 12. On the suction boxes 25 and 26 which extend as shown in FIG.

The circulating roller grid moves under the stack cassette 12 in the direction of arrow A. Plate-like plate 3 supporting opposing side walls of the stack cassette 3
A lining 32 that increases the frictional force is provided below 0 and 31.
The lining has a roller 8 made of tubing that can rotate freely as the roller passes under the cassette.
As the side edge region of the shell is pressed, the rollers are biased in a rotational motion, whereby the rollers support the lowermost bag deposited in cassette 12 as shown in FIG. After the roller 8 has reached below the cassette 12, two suction devices 35 are located on the left side of the end area of the cassette shown on the left side of FIG. The lower roller 36 grips the lower leading edge 36 of the lowermost deposited bag and pulls it under the roller 8 rolling straight and down before the next roller 8, so that the following roller 8 is pulled. The suction device which penetrates into the wedge-shaped slit between the front end of the bag and the end region of the next bag to be released, and then rises and falls periodically, is again lowered in a suitable manner.

The method in each case of peeling the lowermost bag from the stack cassette and driving the liftable suction device basically corresponds to that described in the drawing of DE-27 32 592 C2. See above for a detailed description. Furthermore, the suction device 35 is also DE-273.
As described in No. 2591C2, it is connected to a suction air supply source that supplies suction air to the suction device 35 periodically. The bag continuously separated from the lower side of the stack held in the cassette 12 is peeled off as shown in FIG. 3, and then the first peeled side edge hits the suction belt 17, and On the other hand, the part which is still in contact with the stack is gradually peeled off by the rolling rollers 8 of the circulating roller grid until the opposite side completely hits another suction belt 18. The distortion of continuously supplied workpieces resulting from stacks of this type is compensated for by the different speeds of the suction belt conveyors 17,18. That is, the suction belt conveyor 17 is driven at a lower speed than the suction belt conveyor 18.
The speed of both suction belt conveyors 17, 18 can be adjusted by separately controllable geared motors.

In order to control the geared motor, the position of the cylindrical material dropped onto the suction type belt conveyors 17 and 18 is detected by a sensor, and depending on the tilt position which is confirmed in some cases, the suction type A computer is provided to control the geared motor so that distortion is compensated for by different belt conveyor speeds. Of course, the speed of the suction belt conveyor can be manually adjusted by visual judgment. Please refer to the detailed description of DE-A-195 39 935 for the type of configuration of the geared motor and its control mechanism. Conveyor belt 17, 1
The bags fed in a scaly fashion on top of the conveyor belt 4 are then fixed to the frame in a scaly form from the conveyor belt (an aspect not shown) and connected to the conveyor belt 4.
Run over 0. The endless conveyor belts of the conveyor belt 40 run on front guide rollers 41 driven by an endless belt or chain 43 by a geared motor 42. The two holding belts 46, which are pulled back and forth by rollers 45 supported on the frame and extend parallel to one another, are guided via a guiding device 47, after which the rear guiding rollers 40 under the scale-overlapping bags 13 are moved. And rides on the second conveyor belt 40.

A winding core 49 held in a swingable frame 48 is disposed above the second conveyor belt 40 so that the bags 13 overlapping in a scale form become a scale-shaped band roll 50. Wound around the core. The winding core 49 or the scale band formed on the core corresponds to the conveyor belt 40 by a driving mechanism (not shown) in order to wind the bags stacked in a scale shape into a scale band roll state. It is driven at a speed. The winding core 49 or the formed scale-shaped band roll 50 is pressed against the scale-shaped bags wound by the necessary compressive force. This compression force is generated by a controlled compression means piston-cylinder unit 41 whose cylinder is connected to a frame and whose piston rod is connected to a rocking frame 48. At this time, the compression means piston-cylinder unit 51 swings the swing frame 48 to the right according to the diameter of the scale-shaped band roll 50.

Since the holding belt 46 is fixed to the winding core 49 at the start of the winding process, the holding belt is held from the outside when the scale-stacked bags are wound around the scale-shaped band roll 50. It is located on the bag 13 which has a scale-like shape. When the winding of the scale-shaped band roll 50 is completed, the holding belt is separated and its end is fixed to the scale-shaped band roll, so that the scale-shaped band roll is removed from the frame 48 together with the core, and the next scale is formed. A new core is installed to wind the band-shaped roll. An apparatus for winding scaly articles on a scaly band roll is disclosed in DE-A-254413.
No. 5 and EP-B-0054735, reference is made to the above-mentioned document for details of a device for winding scale-stacked bags on a scale-shaped band roll.

[0016]

As described above, the separation device used in accordance with the present invention allows for the separation of loosely stacked bag stacks and also due to the fact that the adhesive is not completely solidified at the time of lamination. Even if the bags adhere to each other, the individual bags can be reliably separated.

[Brief description of the drawings]

FIG. 1 is a side view of an apparatus for separating a stack and winding the separated bags into a scale-shaped band roll.

FIG. 2 is an enlarged view of the separation device shown in FIG.

FIG. 3 is a sectional view of the separation device taken along line III-III in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Separation apparatus 2 Side part 3 Side part 4 Holding member 5 Holding member 6 Guide surface 7 Guide surface 8 Roller 10 Journal 11 Upper stringer 12 Cassette 13 Paper bag 14 Side wall 16 Conveyor belt 17 Suction belt conveyor 18 Suction belt conveyor REFERENCE SIGNS LIST 20 guide roller 21 console 22 notch 23 guide roller 24 guide roller 25 suction box 26 suction box 30 plate 31 plate 32 lining 35 suction device 36 side edge of bag 40 conveyor / belt 41 guide roller 42 geared motor 43 chain 45 roller 46 holding belt 47 guide device 48 frame 49 core 50 scaly band roll

Claims (2)

[Claims] 1. An apparatus for separating a stack of flat bags having a folded bottom in the bag surface, wherein the magazine floor supporting the stack rolls in contact with the lowermost workpiece, respectively. , Endlessly patrol,
A stack magazine consisting of a continuous roller grid of rollers in which the rollers circulate; and a stack magazine located below the upper stringer of the roller grid and extending at an angle to the roller grid and from the stack by the continuous rollers. A transport device for dropping the lowermost bag each time, and aligning the side edges of each bag parallel to the transport direction, and a preceding roller supports the stack still above the bag, and Side rollers of the lowermost bag each time the two rollers pass between the stack and the bag above it, ensuring that the uppermost bag is separated from the stack. A suction device which is held between the rollers in synchronization with the rolling of the rollers, and a winding core supported by a machine frame and provided with a drive mechanism, or a conveying device wound around the winding core, or And a bag that can be placed in the vicinity of the transfer device and a bag that has been dropped on the first conveyor belt extending parallel to each other in a scale shape is held from the outside. At least one retaining belt biased from a storage roller, such that the retaining belt is in contact with the bag. 2. The conveyor according to claim 1, wherein the conveyor arranged under the upper stringer of the roller grid comprises at least two mutually circulating endless conveyor belts which can be driven at different speeds. The described device.