EP1174343A1 - Device for banding a packed good unity - Google Patents

Abstract

The banding machine includes a frame forming a gate(8), driven film rolls(11), a film curtain formed in the gate, and relatively movable double welding beams on both sides of the gate. For the at least occasional adjustment of the film tensioning during the moving together of the double welding beams a unit is provided for displacement of packed goods on the other side of the gate opposite the normal transporting direction back to the gate. The displacement of packed goods is effected by a conveyor operated opposite to the normal conveyor direction.

Description

The invention relates to a device for banding a packaged goods unit with a foil band, with a a frame forming a gate, with one extending through the gate extending, consisting of at least one conveyor Conveyor line for the packaged goods unit, with drivable film rolls, their film webs at their ends together are connected and form a foil curtain in the gate as well with mutually movable ones arranged on both sides of the gate Double welding bar, whereby the packaged goods unit through the gate is conveyed through and the film curtain takes along, so that this is around the side Puts the packaged goods around, and then the double welding bars move together and the foil curtain behind the packaged goods unit by welding the film webs close together.

Such devices are known in practice, the used for banding packaged goods, which are packed with stretch or shrink films.

The disadvantage here is that when moving the Welding bar the film curtain is contracted and thus an additional tension on the film banding is applied. This can lead to relocation the goods of the packaged goods unit come and / or an overextension the slide.

The object of the invention is to avoid these disadvantages and to provide a device of the aforementioned type with the tension of the film when closing and welding the film banding reduced and / or set specifically can be.

This object is achieved by a device for banding a packaged goods unit with a foil band, with a frame forming a gate, with a through the gate extending, from at least one conveyor existing conveyor line for the packaged goods unit, with drivable Foil rolls, their film webs at their ends are interconnected and a foil curtain in the gate form and with each other arranged on both sides of the gate movable double welding bar, the Packaged goods unit is conveyed through the gate and takes the foil curtain with it, so that this around the side of the packaged goods unit, and then move the double sealing bars together and the foil curtain behind the packaged goods unit by welding the Seal the film webs together, at least for temporary adjustment of the film tension while moving together the double welding bar is a device for Relocation of the packaged goods unit located beyond the gate against the normal direction of conveyance back to the gate is provided. This allows the double welding bar the film in one half of the width of the packaged goods at an appropriate distance from the end of the packaged goods unit are captured by the double welding bars and the packaged goods unit at least temporarily when moving together the double welding bar can be moved closer to it, so the tension of the slide is roughly constant remains and a relocation of the goods of the packaged goods unit is avoided. By appropriate procedure of the packaged goods unit by controlling the conveyor can also be targeted the tension of the banding can be influenced, z. B. only during the second half of the movement of the Double welding bars.

Here, for. B. the packaged goods unit only in the second Half of the movement of the double welding bars for welding the film webs closer to the double sealing bar become.

Depending on the requirements, several sponsors can arranged on both sides of the (closed) double welding bar are provided so that the weld on a greater height of the film webs can take place.

Preferably, the device for relocating the Packaged goods unit at least partially beyond the gate located, also against the normal direction of conveyance operable conveyor of the conveyor line, so that without additional technical facilities an opposite Movement of the packaged goods unit can take place.

The conveyor line can be horizontal and the gate with the foil curtain be arranged vertically so that with a corresponding technical packaging appropriate packaging the packaged goods unit is possible.

In this case, the sponsor (s) can. B. as Belt or chain conveyor to be formed.

The conveyor line can also be vertical and the gate with the Foil curtain must be arranged horizontally, so that too a package generating vertical tension, e.g. B. means Vertical stretch, can be done.

The conveyor (s) can be equipped with support arms or the like engaging in free spaces of the packaged goods unit Support conveyor be formed so that the packaged goods outer surfaces for packaging the packaged goods unit are freely accessible.

The invention also relates to a device for banding a packaged goods unit with a foil band, with a packaged goods unit and a frame forming a gate, with drivable film rolls, the film webs on their Ends connected together and one in the gate Form a film curtain as well as on both sides of the gate arranged, mutually movable double welding bar, the gate with the film curtain using a Moving device moved over the packaged goods unit and the film curtain on the packaged goods unit gets stuck and lies laterally around it, and then move the double welding bars together and the film curtain behind the packaged goods unit by welding seal the foil webs together.

Such devices are known in practice, the used for banding packaged goods, which are packed with stretch or shrink films.

The disadvantage here is that when moving the Welding bar the film curtain is contracted and thus an additional tension on the film banding is applied. This can lead to relocation the goods of the packaged goods unit come and / or an overextension the slide.

The object of the invention is to avoid these disadvantages and to provide a device of the aforementioned type with the tension of the film when closing and welding the film banding can be reduced.

This object is achieved by a device for banding a packaged goods unit with a foil band, with a packaged goods unit and one forming a gate Frame, with drivable film rolls, their film webs are connected at their ends and one in the gate Form a film curtain as well as on both sides of the gate arranged, mutually movable double welding bar, the gate with the film curtain using a Moving device moved over the packaged goods unit and the film curtain on the packaged goods unit gets stuck and lies laterally around it, and then move the double welding bars together and the film curtain behind the packaged goods unit by welding seal the film webs together and for at least temporarily adjusting the film tension while the double welding bars are moving together a device for relocating beyond the packaged goods unit located gate with the double welding bar against the normal direction of travel back to the packaged goods unit is provided. This allows the double welding bar the film in one half of the width of the packaged goods at an appropriate distance from the end the packaged goods unit captured by the double welding bars and the double welding bars at least temporarily move closer to the packaged goods unit when moving together be so that the tension of the film is approximately constant remains and a relocation of the goods of the packaged goods unit is avoided.

Here, for. B. the double welding bar only in the second half of their movement to weld the film webs be brought closer to the packaged goods unit.

The moving device can be horizontal and the gate be arranged vertically with the film curtain, or it the travel device can be moved vertically and the gate with the Foil curtain must be arranged horizontally.

A stopper can preferably be used as a limit stop Back travel path should be provided so that an accurate Positioning can be done.

A control device can also be used to control the return travel path and at least one sensor for detection of the return path may be provided, at least a sensor designed as a light barrier and / or at least a sensor can be designed as a contact switch can. The sensors can either be near the Double welding bar can be arranged and thus the double welding bar Detect the facing end of the packaged goods unit or at a distance from the double welding bars be provided and thus facing away from the double welding bar Detect the end of the packaged goods unit.

A control device for controlling the travel paths can also be used the conveyor and / or the moving device is provided be so that positioning of the packaged goods unit or the gate with the double welding bar for the appropriate packaging stages easily and accurately can.

Furthermore, a device for detecting the movement the double welding bar, in particular a rotary pulse generator, an angle encoder or the like for controlling the film roll drives be provided so that depending the movement of the foil and deflection rollers the drive speed of the film rolls can be controlled.

The axes of the film rolls can preferably be horizontal extend and deflection devices for those of the Foil rolls are provided for the curtain running foil webs be so that when changing the film rolls then one Film roll with the help of a stacker or a hand pallet truck as it is delivered on a pallet, can be inserted into the device, whereby the Handling effort and the risk of accidents when changing film rolls is reduced. It is advantageous if on the outside of the frame bearing for the axes of the film rolls are arranged.

There is also the option of at least one side arrange several film rolls on top of each other. Then one of the film rolls can serve as a supply roll, which is put into operation when the other roll of film is used up. Then dead times are reduced at Film change. But you can also use film rolls use different film formats, each can be used if necessary. With less space the film rolls can be arranged on one side. Here, the film web for one side of the film curtain passed over the device.

In a preferred embodiment of the invention, everyone is Film roll a friction wheel drive attacking on its circumference assigned, and there are film storage for the film webs provided on their way to the film curtain. In order to can electronic controls for the speed of the Drives for adaptation to the film consumption the shrinking circumference of the film rolls is eliminated. The The speed of the drives is also no longer dependent on the number of cycles the device or the transport speed of the Packaged goods units dependent, because the film storage can continuously filled and emptied when necessary. Suffice it Foil storage with at least one dancer roller.

Fig. 1

schematisch eine Seitenansicht einer Anlage zum Banderolieren einer Packguteinheit mit einer Folienbanderole, die anschließend geschrumpft wird,

Fig. 2

eine Draufsicht auf den Gegenstand nach Fig. 1,

Fig. 3

eine Ansicht der Vorrichtung zum Banderolieren einer Packguteinheit mit einer Folienbanderole,

Fig. 4

eine Seitenansicht des Gegenstandes nach Fig. 3 und

Fig. 5

eine Draufsicht auf den Gegenstand nach Fig. 3.

An exemplary embodiment of the invention illustrated in the drawing is explained below. Show it:

Fig. 1

schematically a side view of a system for banding a packaged goods unit with a film band, which is then shrunk,

Fig. 2

2 shows a plan view of the object according to FIG. 1,

Fig. 3

2 shows a view of the device for banding a packaged product unit with a film band,

Fig. 4

a side view of the object of FIGS. 3 and

Fig. 5

3 shows a plan view of the object according to FIG. 3.

1 and 2 you can see a conveyor 1 with a Task end 2 for receiving packaged goods units 3 that can consist in particular of palletized stacks of goods. The conveyor 1 extends through a device 4 for Banding the packaged goods unit 3 with a film band and further by a shrinking machine 5 more common Design up to an end of delivery 6. In the area of the end of delivery 2 there is a control cabinet 7.

Depending on the requirements, several conveyors 1, 1a, 1b, on both sides of the (closed) double welding bar 16 are arranged, so that the weld at a greater height of the film webs 12, 12a can.

Belongs to device 4 for banding, as from the 3 to 5, a frame 9, which a gate 8th forms, through which the partially not shown Conveyor 1 extends. There are 8 on both sides of the gate on the outside of the frame 9 bearings 10, 10a for horizontal therein to be stored, in Fig. 4 for the sake of clarity Film rolls 11, 11a, not shown, are arranged. In the designs shown in the figures are on everyone Side of the frame 9 each have two film rolls 11, 11a arranged with horizontally extending axes. It but can also only one film roll 11, 11a per Be arranged side.

The film webs drawn off from the film rolls 11, 11a According to FIG. 3, 12, 12a first pass through film stores 13, 13a, the at least one dancer roller 14, 14a have, and are then each via a deflection device 15, 15a performed in the illustrated Execution from an inclined, in particular with Teflon coated or made entirely of Teflon There is a role or rail that the film webs 12, 12a transferred from a horizontal position to a vertical position. In this vertical position will come from both sides Foil sheets 12, 12a in the area of the gate 8 on their respective ends connected together.

For this purpose, 8 double welding bars 16, 16a arranged against each other with associated drives are mobile. Each film roll 11, 11a is on assigned to their circumferential friction wheel drive 17, 17a.

Furthermore, in the control cabinet 7 is not shown Integrated control device, which is the control the return path, especially depending from a sensor for detecting the position of the packaged goods unit performs.

Contact switches and / or can preferably be used as sensors Light barriers 18 are used.

The device shown works as follows:

In the gate 8, the film webs connected with their ends form 12, 12a each have a film curtain. In this foil curtain drives a transported on the conveyor 1 Packaged goods unit 3 and takes the film curtain, so that the packaged goods unit 3 is wrapped with foil on three sides becomes. After the packaged goods unit 3 by moving forwards or backwards positioned, the two drive on both sides of the conveyor 1 arranged double welding bars 16, 16a together and guide the film webs 12, 12a around the rear fourth side of the packaged goods unit 3 until it is about meet in the middle or outside the middle. There, the two film webs 12, 12a with one Provided double weld seam and by a not shown Heating wire in the middle between the double weld seam separated so that for the following packaged goods unit 3 Another foil curtain is created.

The friction wheel drives 17, 17a of the film rolls 11, 11a can regardless of the conveyor's transport speed 1 and of the number of cycles of the device practically without Work interruption so that film webs 12, 12a inserted into the associated film storage 13, 13a become. The film webs located in the film store 13, 13a are deducted from this if necessary, i.e. when a new packaged goods unit 3 moves into the gate 8 and the film curtain located there.

If a film roll 11, 11a is used up, first the other film roll without changing the film roll 11, 11a 11, 11a are put into operation. One can but also on each side of the frame 9 film rolls 11, 11a with different film widths and has then the possibility for a quick change of the Film format.

What is not shown in the figures can also be a second film curtain can be provided, the inactive The film curtain has moved up. That by the upward movement resulting change in path between foil curtain and film rolls 11, 11a is over the dancer roll 14, 14a in the film storage 13, 13a compensated.

The second film curtain can also overlap first film curtain to be arranged if packaged goods 3 should be banded, the height of which is greater than the height of a foil curtain.

Here, the deflection device 15, 15a is in its height position process, the film storage 13, 13a the Compensates for path changes. You can use just one Pair of film rolls 11a can be moved, but it can also several pairs of film rolls 11, 11a can be changed in their position his.

To keep the tension of the foil curtain constant, the conveyor 1 becomes at least temporarily during the moving together the double welding bar 16 contrary to the normal Move the conveying direction to gate 8 so that the Packaged goods unit 3 closer to the double welding bar 16 is moved. To prevent the packaged goods unit 3 from colliding with Avoid the double welding bar 16, the position the packaged goods unit 3 is detected by a light barrier 18, and the control device in the control cabinet 7 stops the backward movement of the conveyor 1.

Via a device for detecting the movement of the double welding bars 16, in particular a rotary encoder Angle encoder or the like for controlling the film roll drives can depend on the movement of the Pendulum arms attached film and deflection rollers the drive speed the film rolls 11, 11a controlled become.

Claims (15)

Device for banding a packaged goods unit (3) with a film band, with a frame (9) forming a gate (8), with a conveyor line for at least one conveyor (1, 1a, 1b) extending through the gate (8) the packaged goods unit (3), with drivable film rolls (11), the film webs (12) of which are connected to one another at their ends and form a film curtain in the gate (8) and with double welding bars (16) which are arranged on both sides of the gate (8) and are mutually movable, whereby the packaged goods unit (3) is conveyed through the gate (8) and takes the film curtain with it so that it lies laterally around the packaged goods unit (3), and then the double welding bars (16) move together and the film curtain behind the packaged goods unit (3 ) close by welding the film webs together, characterized in that for at least temporarily adjusting the film tension during the moving together of the double seal ßbalken (16) means for moving the packaged goods unit (3) located beyond the gate (8) against the normal conveying direction back to the gate (8) is provided. Apparatus according to claim 1, characterized in that the device for displacing the packaged goods unit (3) is a conveyor (1, 1a, 1b) at least partially beyond the gate (8) which can also be operated against the normal conveying direction. Apparatus according to claim 1 or 2, characterized in that the conveyor line is arranged horizontally and the gate (8) with the film curtain is arranged vertically. Apparatus according to claim 3, characterized in that the (the) conveyor (1, 1a, 1b) are designed as a belt or chain conveyor. Apparatus according to claim 1, characterized in that the conveyor line is arranged vertically and the gate (8) with the film curtain is arranged horizontally. Apparatus according to claim 4, characterized in that the conveyor (s) (1, 1a, 1b) are (are) designed as support conveyors which engage in free spaces of the packaged goods unit (3) with support arms or the like. Device for banding a packaged goods unit (3) with a film band, with a packaged goods unit (3) and a frame (9) forming a gate (8), with drivable film rolls (11), the film webs (12) of which are connected to one another at their ends and form a film curtain in the gate (8) and with double welding bars (16) which are arranged on both sides of the gate (8) and are movable relative to one another, the gate (8) with the film curtain being moved over the packaged goods unit (3) by means of a moving device and the film curtain thereby sticks to the packaged goods unit (3) and lies laterally around them, and then move the double sealing bars (16) together and seal the film curtain behind the packaged goods unit (3) by welding the film webs together, characterized in that for at least temporarily adjusting the film tension during the moving together of the double welding bar (16) means for shifting the beyond d er the packaged goods unit (3) located gate (8) with the double welding bar (16) against the normal direction of travel back to the packaged goods unit (3) is provided. Apparatus according to claim 7, characterized in that the moving device is arranged horizontally and the gate (8) with the film curtain is arranged vertically. Apparatus according to claim 7, characterized in that the moving device is arranged vertically and the gate (8) with the film curtain is arranged horizontally. Device according to one of claims 1 to 9, characterized in that a stopper is provided as a limit stop for the return travel path . Device according to one of claims 1 to 10, characterized in that a control device and at least one sensor for detecting the return travel path is provided for controlling the return travel path . Apparatus according to claim 11, characterized in that at least one sensor is designed as a light barrier. Apparatus according to claim 11 or 12, characterized in that at least one sensor is designed as a contact switch. Device according to one of claims 1 to 13, characterized in that a control device is provided for controlling the travel paths of the conveyors (1, 1a, 1b) and / or the displacement device. Device according to one of claims 1 to 14, characterized in that a device for detecting the movement of the double welding bar (16), in particular a rotary pulse generator, an angle encoder or the like is provided for controlling the film roll drives.

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