JPS61232131A - Device for covering single or plurality of filling tube piece for packaging machine with bag with valve to be filledand fitting said bag - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of Application The invention comprises a singulation device for removing valved bags from a storage by means of rollers or the like, and a unit for opening the valves, which is equipped with a suction body. , relates to a device for fitting a valved bag to be filled into one or more filling tubes of a packaging machine.

BACKGROUND OF THE INVENTION A device of the type described above is known, but this known device is only used for fitting over a valved bag whose bottom is folded and glued. Such bags are, for example, valved bags with a hexagonal bottom. The individual units of the device are designed and arranged with respect to each other in such a way that the bottom with the valve is located perpendicular to the bag wall. The device itself is designed in such a way that the open valve is located in the central longitudinal axis of the filling tube. The conveyance of the valved bag relative to the filling tube takes place by means of a conveying element, which does not extend into the range of movement of the area of the valved bag suspended on the filling tube.

In addition to valved bags with a hexagonal bottom, side-folded valved bags, preferably made of paper, are also known, consisting of multiple layers. The manufacture of such valved bags takes place from a tube section, in which case the corners of the tube section are folded in to form the valve and the ends are closed by means of sealing joints.

Both ends are provided with folded closure strips which are usually secured by closure joint means. In the case of such valved bags, in contrast to valved bags with a folded bottom, the slit-like filling opening of the valve is located in the direction of the wire. For these reasons alone, the known overfit devices are not suitable for processing side-fold valve bags.

Side-fold valve bags are commonly referred to as joined valve bags or joined paper valve bags. If a closure strip is provided, the closure strip should be covered with rider tape (
It is also called Relterband).

Problem to be Solved by the Invention The object of the invention is to make it possible to fit even side-folding valved bags over the filling tube of a packaging machine with structurally simple means and with satisfactory working efficiency. , the object is to improve a device of the type mentioned at the outset.

Means for Solving the Problems In an embodiment of the invention, the suction body is adapted to engage in the side wall of the valved bag in the valve area, and on the upper side of the suction body there is provided a structure for the upper part of the valved bag. A downwardly-opening chevron-shaped guide track is arranged in the valve, and the drive member cooperates with the valved bag immediately below the valve area for conveying the valved bag.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The device illustrated in FIG. 1 has a conveyor belt 1 circulating in the direction of the arrow guided via deflection rollers 2.
This conveyor belt 1 is driven by a drive device 3. The drive 3 is constructed as a gear motor and has a switchable latch which can be switched on and off periodically, and is permanently connected in this case. The conveyor belt is further tensioned via two tensioning rollers 4, which are arranged in such a way that, when the conveyor belt is tensioned, the drive disk wraps around more corners. A series of support strips are provided between the two bell sections of the conveyor belt.

A series of transport rollers 6, which are rotatably mounted on transverse belts 7, are assigned to the transport belt section of the transport belt. A piston/cylinder unit 8 is pivotally attached to the horizontal portion 7. During operation, if valved bags are continuously fed into the filling tube of a packaging machine (not shown), the conveying rollers 6 contact the conveying belt section of the conveyor belt or contact the bag wall. do. In the event of an obstruction, for example due to a bag with a valve being pinched, the lateral 7 can be moved together with the conveyor roller 6 away from the conveyor belt. For this purpose, the piston/cylinder unit 8 is switched and controlled. Furthermore, the conveyor belt 1, the support roller 5 and the conveyor roller 6 rotate about a vertical axis, so that the bag to be fitted over is held at its upper end and freely suspended.

Furthermore, as shown in FIG. 1, the lateral beams extend only over a portion of the conveyor belt.

This conveyor belt section essentially corresponds to the opening and waiting station of the device. In the part of the device located upstream of this station in the transport direction of the bags, the valved bags are individually removed from the coil in a manner not shown.

Furthermore, as is clear from FIG. 1, there are suction cups 9,
A suction strip 11.12 with 1o is provided.

The suction strip 11 is assigned to the conveyor belt 1 , whereas the suction strip 12 is assigned to the conveyor roller 6 .

The suction cups 9, 10 therefore engage on both sides of the bag. The suction strips 11.12 each have one parallel link rod 13 actuated via a piston/cylinder unit) 15.16.
．． It is pivoted to 14.

As can be seen from FIGS. 2 to 5, the individual operating steps for opening the valve 17 of the valved bag 18 illustrated in FIG. 6 are illustrated. A chevron-shaped guide track 19 is disposed above the passageway for the valved bag 18 formed by the transport belt l and the transport roller 6, and this guide track runs through a loop (not shown in detail) 2o. The piston is connected to the piston rod of the cylinder unit 21. The rod 20 and the piston cylinder 21 are arranged so that the guide track 19 can be moved in the vertical direction.

Assigned to the rod P20 are two axially parallel guide rods 22, 23, on which the receiving elements 24 are placed, which are fixedly connected to the rods 20, so that the rod movements can be carried out in the vertical direction. Let's do it together. Furthermore, the cylinders of the piston-cylinder unit 15.16 are pivoted on the receiving member 24, while the piston rods engage in the parallel link rods 13.14.

In the illustrated embodiment, a contactless detection member, for example a photoelectric sex for controlling bag transport, is arranged below the transport roller.

The valve 17 of the valved bag 18 is only illustrated in FIGS. 4 and 5. The valved bag with the valve to be opened is transported via the conveyor belt 1 and the conveyor roller 6 to the opening and waiting station after the pre-opened valved bag has been fitted over the filling tube piece. Ru. In this case, after the valved bag has been removed from the area of the detection element, the next valved bag begins to be conveyed. As is clear from FIGS. 2 to 5, the conveyance roller 6 cannot be rotated in the operating state. In FIG. 2, the piston and thus the guide track of the piston-cylinder unit 21 occupy the upper position, but the piston rod of the piston-cylinder unit 15, 16 is pushed out. In this position, the suction cup 9.10 is not yet in contact with the wall of the valved bag. According to FIG. 3, such contact is obtained by retracting the piston rod of the piston-cylinder unit 15,16. To open the valve 17, the piston rod of the piston e-cylinder unit 21 is pushed out. As a result, on the one hand, the guide trajectory 1 of Yamagata
9 is moved downwards to exert pressure on the upper edge of the valved bag and on the other hand the piston-cylinder unit)15.
The pivot points of 16 are also shifted downwards in the direction of the drive member, whereby the suction cups 9, 1o are moved outwardly in opposite directions. Therefore, the opening of the valve 17 is caused by the chevron-shaped guide track 19.
This is caused by the downward movement of the suction cups 9 and the simultaneous outward movement of the suction cups 9 and 1O.

Particularly advantageously, in the embodiment shown, all movements for opening the valve 17 are produced by one piston-cylinder unit.

In the embodiment of FIG. 4, the valve is already open, but the suction cup 9.10 is in contact with the bag wall in the area of the valve. As is clear from a comparison between FIGS. 3 and 4, only the piston rod of the piston/cylinder unit 21 has been pushed out. In FIG. 5, the next working step is illustrated. The piston rods r of the piston-cylinder unit 14, 15 have been pushed out, so that the suction cups 9, 10 are moved further outwards and taken out of contact with the bag wall of the valved bag 18. The valved bag 18 can now be placed over the filling tube piece. For this purpose, the longitudinal axes of the filling tube and the valve 17 must be aligned with each other.

Controlling the vacuum for the suction cups 9.10 will not be detailed. This is because such a control is evident from the respective position of the suction cup itself.

As is clear from FIGS. 2 to 2, the conveyor belt 1 cooperates with the conveyor roller 26 and serves as a supporting member for opening the valve 17.

After the valved bag to be fitted over has moved away from the range of the non-contact detection member 25, the piston rod of the piston cylinder unit 21 is retracted. This results in the position according to FIG. 2, so that the next valved bag can be transported to the opening and waiting station.

In the arrangement according to FIGS. 2 to 5, the opening movement of the suction cup 9, 10 and the simultaneous lowering movement of the guide track 19 are carried out by the piston.
This is done by pushing out the piston rod of the cylinder unit 21.

However, the opening movement of the suction cup is controlled by a separate drive device.
In other words, it can also be performed independently of the guide orbit movement.

In this case, the opening movement of the suction cup is carried out simultaneously with the lowering movement of the guide track, but in certain cases it may be advantageous if it is carried out even at a slight time interval. The drive for the suction cups can be a piston-cylinder unit acting on parallel link rods 13, 14 via rods and cylinders.

The valved bag illustrated in FIG. 6 is a side-fold type valved bag that is sealed using one closure tape 26 at the upper and lower edges. For reasons of manufacturing technology, the ends of the sealing tape 26 protrude from the longitudinal edges of the bag. Furthermore, the amount of protrusion that protrudes from the folded valve 17 is particularly large at the extension side corner portion.

The embodiment according to FIG. 7 differs from the embodiment according to FIG. 1 in that it has two straightening devices for upper and lower bag binding! 127.28 is provided. As seen in FIG. 7, the front straightening device 27 in the direction of passage of the valved bag is located just in front of the suction cup 9.10. Furthermore, this straightening device 27 is located at the level of the chevron-shaped guide track 19. In Fig. 7, straightening device 2
8 is not shown in detail, the straightening device 28 is located in the passage plane of the valved bag and is offset downward with respect to the straightening device 27 (as shown in FIGS. 13 and 14). (details).

As is clear from FIGS. 8 to 12, the straightening device 27 consists essentially of two straightening flanges 29, 30 in order to equalize the upper bag binding; The straightening flap 29 located on the side is aligned with the horizontal axis 31
It is possible to rotate around the center. The straightening flat 29 can be pivoted so that the valved bag 18 can be brought into a suspended position by means of a conveying member (not shown).

As shown in FIGS. 8 and 9, the upper flap is deformed into a wavy shape. After the straightener 7 ratchet 29 has been pivoted towards the straightening flap 30, a channel-like guide P is formed, by means of which the bagging is equalized.

The width of the orthodontic flap 29.30 is shorter than the bag width, so
The rearwardly bent end of the closing tape, which is located at the front in the transport direction, is not yet straightened. For this purpose, the straightening device 29,30 is moved towards the guide track 19. This is indicated by the arrow < s1 direction. The rear end is automatically straightened when the valved bag is transported.

If care is not taken when transporting an empty valved bag, the protruding portion of the sealing tape may become deformed.

As long as the empty valved bag is transported with the necessary care, it is not necessary to provide the straightening flap with any mobility.

FIGS. 13 and 14 schematically show a rotary packaging machine 32 having a filling tube 33 and a connecting member 34 located below the filling tube. Orthodontic flap 3
0.31 is not shown. As can be seen in particular from FIG. 14, the connecting element 34 consists of two shell-shaped support plates 35, 36 arranged at a distance from each other. The edges of the support plates facing each other, located at the same height, define a slit 37 which typically has a width of approximately 4t-In. When an empty valved bag is fitted over the filling tube piece 33, the lower bag tab is located within the slit 37. The lower bag binding straightening device 28 is a straightening thin plate 3 that is fixedly arranged.
8 and a straightening thin plate 39 which is pivotable about a horizontal axis. In order to bring the valved bag transported to the opening and percentage station into a vertical position, it is necessary to pivot the straightening plate 39.

As illustrated in FIG. 14, a stationary straightening plate 38
is designed for maximum bag width. The pivotable straightening plate 39 is very short in this embodiment. because,
This is because it is sufficient if only the front range of the lower bag binding is straightened when it is moved toward the straightening thin plate 38. Further equalization takes place by transporting the valved bag in the direction towards the filling tube or the connecting element. This is because the straightening plates 38, 39 which are moved away from each other form a straightening path approximately 2 cm wide. Adjustment of the lower bag closure is particularly necessary in the case of side-folding valved bags whose height is reduced during filling, in which case the lower edge of the unfilled valved bag is connected to the connecting member 34. Support thin plate 35 to be formed
．． projecting downwardly from the mutually facing edges of 36.

Effects of the Invention With the configuration of the present invention, you can drive without suffering from driving impairment.
In addition, a side-fold type bag with a valve can also be fitted over the bag without reducing the working capacity of the packaging machine. The suction body engages the side wall of the valved bag in the valve area, so that
A perfect valve opening can be achieved, in which case the valve is directed towards the filling tube piece via the downwardly opening chevron-shaped guide track,
During transport, the valve is held in the open position by the suction body. In this case, the drive member for conveying the valved bag constitutes a support member. This is because the drive member is located directly below the valve area. A significant advantage of the invention is that the valved bags are held in the upper region by the individualizing drive and are otherwise transported in free suspension. Furthermore, it is provided that the conveying direction is located in the direction of the longitudinal axis of the filling tube at the time of overfitting.

In an embodiment of the invention, the suction body is arranged in the forward region of the guide track in the direction of passage of the individualized valved bags, and at least the part of the guide track located in the region of the suction body is provided with The drive member is oriented in the direction of the drive member to open the valve by the body (the drive member is movable in the vertical direction so as to perform the moxibustion movement, and the drive member is in constant contact with the outer bag wall when the device is in operation). In this embodiment, the opening of the valve takes place for the first time at the last station of the device through which the valved bag to be fitted over passes.This station is the so-called opening and waiting station; The valved bag is taken away by the free filling tube from the opening and waiting station.

In this embodiment, the opening and waiting station is therefore a single component. Since the valve opening takes place immediately before the filling tube, the risk of the opening valve being closed is eliminated.

This is achieved in particular in that the guide track located above the upper bag edge is arranged so that it can be lowered.

The opening of the valve is therefore effected not only by the suction body, but also by the pressure exerted by the guide track. Since the opening movement of the suction body and the lowering movement of the guide track take place simultaneously, the opening of the valve is considered to be a forced opening. After opening the valve, the suction body is moved away from the bag wall. This is because the valve is held open only by the guide track. Since the drive member is in constant contact with the bag wall during normal operation of the device, the drive member constitutes a support member. The valved bag therefore does not shift during the downward movement of the guide track.

This ensures that the valve is located at the same level as the filling tube of the packaging machine.

If the suction body leaves the valved bag, the drive member is moved in order to fit the valved bag occupying the opening and waiting station over the respective filling tube piece. At the same time, another valved bag is conveyed from the singulation device into the opening and waiting station in order to open the valve.

In a further embodiment, the drive element, which is stationary in the operating state, consists of a drivable conveyor belt and a number of freely rotatably mounted conveyor rollers, in which case at least one of the drive elements is connected to the device. In the stopped state, it can be moved away from the associated drive member. In addition to the fact that the drive element has a relatively simple construction, faults occurring during operation can be eliminated relatively quickly while the machine is stopped. This is because by moving one drive member away, the conveyance path can be approached. This allows the wrinkled valve bag to be removed without difficulty. This can be carried out particularly easily if the conveyor rollers are arranged pivotably relative to the conveyor belt. This is because the conveyor belt is normally not driven.

In the case of jointed valved bags, it is common to provide one closure strip at the top and one bottom end, the ends of the closure strips being separated from the longitudinal edge of the valved bag for technical reasons. It stands out. This amount of protrusion is particularly large at the corners of the upper flap where the valves are provided. The closure strip increases the bag thickness at the upper and lower edges. When transporting empty valved bags, it may occur that the protrusion of the sealing strip is undesirably folded back against the bag wall.

Such a risk arises particularly in the case of closure strips belonging to valves. In order to successfully open the valve at the opening and waiting station, it is necessary to position the upper bag and the valve correctly relative to the suction body. Furthermore, valved bags are often significantly deformed in the upper and lower bag closures. This is due to the different thicknesses produced by the sealing strips. In this case, the bag is deformed as if it were wavy. This condition prevents the upper bag binder from being transported to the opening and waiting station positionally correctly, and on the other hand, the lower bag binder is located at the free end of the valved bag located on the filling machine that supports the bag during filling. Touch the edge. The connecting member consists of two parts and is provided with a central slit. In this slit, the lower bag closure is located when it is fitted over the filling tube piece. If the lower bag closure is deformed and the valved bag rests against the front edge of the connecting member, the valved bag will not fit correctly over the filling tube piece.

In order to increase the reliability of operation, an embodiment of the invention therefore provides for equalization of the respective bag in the area of the passing plane of the upper bag and (or) the lower bag.
There are two straightening stations. In order to obtain a particularly simple construction, it is provided in one embodiment of the invention that each straightening station consists of two straightening bolts which can be adjusted approximately at a distance from each other, in which case one straightening bolt is pivotable about a horizontal axis and the associated straightening flap is arranged stationary. Any deformations caused by the straightening station are compensated by linear tensioning. In this case, it is advantageous if the upper straightening station is assigned to the opening station and the lower straightening station is assigned to the opening station. This is because, in this case, the upper bag closure is equalized immediately before the valve is opened, and the lower bag closure is equalized immediately before it is fitted over the filling tube piece, or the valved bag is placed in the slit of the connecting member placed in the filling machine. This is because it is performed immediately before inserting the .

[Brief explanation of drawings]

The drawings show an embodiment of the invention, in which FIG. 1 is a partial plan view of the device according to the invention, FIGS. Illustrations of the device for opening the valve in different working positions, viewed in the direction, FIG. 6 showing a joined valved bag with closure tape, FIG. 7 for upper and lower bag closures. 1, 8 and 9 with additional straightening stations.
Figures 10, 11 and 12 are respectively schematic diagrams of the straightening station for the upper bag binding, Figure 13 is a schematic diagram of the device for fitting the valved bags over, and Figure 14 is the lower side. FIG. 14 is a partial plan view corresponding to FIG. 13 of the device for straightening the bag binding of the machine; DESCRIPTION OF SYMBOLS 1... Conveyance belt, 2... Deflection roller, 3... Drive device, Feeder... Tension roller, 5... Support roller, 6
... Conveyance roller, 7... - laid down, 8, 15, 16.
21・;・Piston/cylinder unit, 9.10・・
・Sucker, 11.12... Suction strip, 13.14...
・Parallel link rod P, 17... Valve, 18... Bag with valve, 19... Guide track, 20... Rod, 22.2
3... Guide rod, 24... Receiving member, 25...
Detection member, 26... Sealing tape, 27.28... Straightening station, 29.30... Straightening flap, 31
...Horizontal axis, 32...Packaging machine, 33...Filling tube piece, 34...Connection member, 35.36...Support thin plate, 37...Slit, 38.39...Correction Continuation of the adjustment flap page

Claims (1)

[Claims] 1. A packaging machine or unit having a singulation device for removing valved bags from a storage by means of rollers or the like, and a unit for opening the valves, which is equipped with a suction body. In a device for fitting valved bags to be filled into a plurality of filling pipe pieces, the suction body (9, 10) is connected to the valve (17).
), the upper side of the suction body is provided with a chevron-shaped guide track ( 19
) is arranged, and the drive member (1, 6) cooperates with the valved bag immediately below the valve area for conveying the valved bag. A device for fitting a valved bag to be filled over one or more filling tube pieces. 2. The suction body is arranged in the forward region of the guide track in the direction of passage of the individual valved bags (18), and
At least the guide track portion located in the region of the suction body is movable in the vertical direction so as to be able to carry out a directed movement in the direction of the drive member for opening the valve by the suction body, and 2. A device according to claim 1, wherein the drive member is stationary in the operating state of the device for constant contact with the outer bag wall. 3. It is composed of a conveyor belt (1) that can be driven by a stationary drive member in the operating state and a number of freely rotatably supported conveyor rollers (6), and at least one of the drive members is in the device stop state. 3. A device according to claim 2, wherein the device is adapted to be moved away from the associated drive member. 4. The device according to claim 3, wherein the conveying roller (6) is arranged so as to be pivotable with respect to the conveying belt (1). 5. The device according to claim 1, wherein a plurality of suction bodies are arranged one after the other and at the same height. 6. Each suction body has a parallel link rod (1) to move each suction body (9 or 10) in the horizontal direction.
2. Device according to claim 1, characterized in that the parallel link rods are pivotably connected to the piston-cylinder units (15 and 16), respectively. 7. Device according to claim 1, characterized in that the drive for the opening movement of the suction body and the drive for displacing the chevron-shaped guide track consist of a common piston-cylinder unit (21). 8. Device according to claim 1, characterized in that the drive device for the opening movement of the suction body and the drive device for moving the chevron-shaped guide track consist of two drives that work independently of each other. 9. The rod (20) whose chevron-shaped guide track (19) acts on the piston rod of the piston/cylinder unit (21)
) The device according to claim 1, having the following features. 10. On the piston rod of the piston/cylinder unit (21) for moving the chevron-shaped guide track (19),
A receiving member (24) synchronously moves the piston rod.
) are connected to each other, and a piston-cylinder unit (15, 16) for operating the parallel link rod is pivotally connected to the receiving member (24).
Apparatus described in section. 11. The receiving member is a piston/cylinder unit (21)
11. Device according to claim 10, arranged vertically movably on two guide rods (22, 23) extending axially with respect to the piston rod. 12. The device according to claim 1, wherein the receiving member (24) is immovably connected to a rod (20) provided in the chevron-shaped guide track (19). . 13. Device according to claim 4, characterized in that the conveying roller (6) is arranged on a transverse beam (7) engaging a manually switched piston-cylinder unit. 14. A bag with a valve (1
8) The device according to claim 1, wherein the conveyance of step 8) can be controlled by a detection member that operates in a non-contact manner. 15. The device according to claim 1, wherein the drive members (1, 6) are driven via a drive device which can be connected and disconnected periodically. 16. Device according to claim 1, characterized in that a drivable guide roller movable along a predetermined trajectory is arranged at the discharge end of the drive member (1, 6). 17. Claim 1, in which the guide roller is driveable via a further guide roller driven by a conveyor belt.
The device according to item 6. 18. Guide roller can pivot around horizontal axis 2
Claim 16 is arranged on two support levers.
Apparatus described in section. 19. Device according to claim 18, in which the support levers are pivotable by a common piston-cylinder unit. 20. The device according to any one of claims 1 to 19, wherein the mutual spacing of the guide rollers in contact with the valved bag is adjustable. 21. A straightening station (27, 28) is provided in each case for equalizing the respective bag edges in the area of the passing plane of the upper bag edge and/or the lower bag edge. An apparatus according to claim 1. 22. Each straightening station (27, 28) has approximately two straightening flaps (29, 3) adjustable at a distance from each other.
0) or (38, 39), and at least one of the straightening flaps (29, 39), respectively.
) is pivotable about a horizontal axis and the associated straightening flap (30, 38) is arranged stationary. 23. Claim 2, in which the upper straightening station (27) is arranged at or approximately at the level of the guide track (19) which is upstream of the opening station and cooperates with the suction body. 22. The device according to item 21. 24. Patent in which the upper straightening station (27) is movable in a horizontal plane into two end positions and the direction of movement is in the direction of passage of the valved bag or opposite to this direction. Apparatus according to any one of claims 21 to 23. 25. The lower straightening station (28) is assigned to the opening station and is located in the vertical projection area of the suction body and in the filling machine for supporting the valved bag during filling. 22. The device of claim 21, wherein the device is provided at a lower level. 26. Device according to claim 22, wherein the length of the straightening flaps (30, 31) of the upper straightening station (27) is shorter than the width of the valved bag (18). 27. The length of the fixed orthodontic flap (38) of the lower orthodontic station (28) is longer than the length of the pivotable orthodontic flap, and the fixed orthodontic flap (38) 38) A patent in which the length is longer than the bag width, and the edges of both front straightening flaps are arranged in the same plane when viewed in the passing direction of the valved bag to be fitted over the bag. Apparatus according to claim 23.