EP1512630A1 - Device for bundling articles, in particular compressible articles such as layers of corrugated cardboard - Google Patents

Abstract

The machine (10) has a strapping material insertion mechanism accessible from an exterior of the machine. The mechanism shows a strapping material guidance canal on a side facing a strapping area by movement unit of a canal closure. The mechanism has feeder runners (26, 32) aligned to a storage unit and aligned in close proximity to a ground at the side exterior of the strapping area.

Description

The present invention relates to a device for strapping in particular compressible packaged goods such as corrugated cardboard layers or the like. according to the preamble of claim 1, as for example has become known from EP 0 681 958 B1.

This device straps the packaged goods by means of a band-shaped Strapping, in particular a thermoplastic plastic tape. The strapping is located on a strapping stock, the ground near the side of the device is. The strapping material removed from the strap stock is first arranged by a next to the Umreifungsmittelvorrat Strapping feed device and then into a adjacent Umreifungsmitteleinspeisung led. From there From the strapping passes through a vertical strapping guide and a strap reversal and strapping transfer to the closure unit.

The closure unit, which acts like the strap transfer and the strap deflection in synchronism with the press plate is movable in the vertical direction of the device are in the known device associated with strapping conveyor rollers. These have the task of first, the strapping in a the To pack packaged goods surrounding circumferential strapping channel, until the leading end of the strapping the closure unit has reached again. Then the task of the strap, whose leading end now in the closure unit is held in order to tighten the packaged goods. For this purpose, the drive of the strapping conveyor rollers is reversible, so that after reversal of their driving direction the strapping pulled out of the Umreifungskanal and around the Packaged goods can be streamlined, then what the Closing unit the tape closure in a known manner by thermal welding each other in the closure unit overlapping tape ends manufactures.

It is common practice - as with the device accordingly EP 0 681 958 B1 - to be inserted into the strapping channel Strapping at least not needed in the full Length directly deduct from the Umreifungsmittelvorrat, but as low tension as possible to remove a strapping storage, which contains a certain amount of strapping. at the device according to EP 0 681 958 B1 is such Strapping storage immediately in front of the closure unit assigned strapping conveyor rollers in press plate Assignment. Thus, the strapping conveyor rollers can Required strap length on the shortest route the Umreifungsmittelmittelspeicher remove.

For a better understanding of the invention explained below It should be noted that in EP 0 681 958 B1 as 'Strap entry device' means 25 essentially serves at the first startup of the device or after a change of the Umreifungsmittelvorrats the Locking device to supply strapping, and therefore More fittingly referred to as a 'strapping feeder' is. The strapping conveyor rollers 23, however, provide the actual Strapping device whose object is to in Umreifungstakt the device strap loops too produce. Since the strapping conveyor rollers also by retreat excess strapping the strapping around the Tighten packaged goods, the strapping conveyor rollers 23 are the EP 0 681 958 B1 de facto essential constituents of a strapping material and -retraction device '.

The known device according to EP 0 681 958 B1 has in years of use in terms of their reliability and Working speed extremely well proven. Opposite before known devices of their kind, so-called. 'Packing presses', could also significant operating advantages can be achieved because it is possible had become, in any operating position of the machine Closing unit from the bottom of a new Umreifungsmittelanfang supply.

The present invention now has a need for improvement recognized, as it is desirable in the case of a Malfunction, in the access in particular to the closure unit adjacent strapping conveyor rollers as well to the strapping store is required to improve so far when it should no longer be necessary to climb the press plate or lower it to the ground.

An essential object of the invention is therefore, a To design a device of the type presumed to be known, that their maintenance in case of strapping conditional Malfunction is significantly reduced.

The invention solves this problem with the features of Claim 1 and is accordingly characterized that the strap feeding device at the same time the strapping conveyor rollers and the strapping store, the Umreifungsmittelvorrat adjacent ground near the side outside the strapping zone is arranged.

The essential core of the invention therefore consists in one modular structure insofar as the closure unit itself no Tape drive - so neither strapping conveyor rollers still Strap withdrawal rollers - more directly assigned and otherwise also no strapping storage, but these Machine aggregates now together with the Umreifungsmittelvorrat and the Umreifungsmitteleinspeisung ground near and sideways arranged outside the strapping zone and thus at any time from Floor easily accessible by operating and maintenance personnel are.

According to one embodiment, it is provided that the strap feeding device the strapping both the Sealing unit supplies as well as through this along the Umspannungsmittel guide frame advances and it to the packaged goods tightens.

The strap feed device preferably comprises a reversible pair of rollers, alternatively as a strap entry roller pair or as a strap retraction roller pair is drivable.

According to another feature of an inventive Device performs the strapping transfer on the shortest Way and immediately the strapping of the Umreifungsmittel-deflection device to the closure unit.

An embodiment of the invention further provides that the strapping storage - in the direction of the strapping considered - between the Umreifungsmittelvorrat and the Strapping feed is arranged and that the filling the Umreifungsmittel storage with Umreifungsmittelrückzug means the strap supply device takes place.

With the exception of rare accidents, where an immediate Access to the shutter aggregate itself may be required Strapping conditional now from the ground be fixed without the previously the press plate by a fitter climbed or lowered into a ground-level position, the latter usually also the previous removal of the in the Strapping zone would be required.

The present invention, which does not exhaust itself, the Strapping storage away from the press beam and the strapping conveyor rollers away from the capping unit next to the device to relocate leads to a new way of operating and saving of aggregate parts. Namely, it combines the previous strap feed device with the strapping margin and -Rückzugsvorrichtung to an aggregate, which performs the tasks of two previously known devices takes over what else two reversible driven pairs of rollers are sufficient.

On the other hand, the device differs accordingly of the invention of EP 0 681 958 B1 in that all the effects on the strap - so both its feed or shot as well as retreat - just from the ground Aggregate completed or controlled. That the Strapping feed device with the strapping material and -Rückzugvorrichtung is uniting aggregate now also alone for filling the strapping storage and the removal of strapping material from it. all of this ultimately also leads to a simplification of the control, as not more on two separate units and in addition to exact timing must be acted upon.

Since the strap retraction during the phase, within pulled the strap from the Umreifungskanal and tightened around the packaged goods, in the device according to the invention a relatively long strap portion are handled must see what greater retraction forces are required for the invention for the protection of the strapping and this receiving guides further, that the Umreifungsmittel deflection device comprises a strapping pulley, which is rotatably mounted on the pressure plate and by means of a on the Strapping guide longitudinally movable carriage from in Closing direction formed spring-loaded flaps Ducting means opens serially. Thanks to the strapping driven pulley and the controlled flaps is Wear-related sliding friction largely avoided. from that Again, there is a reduction in the forces to which the strapping is exposed during his advance or retreat, so that it can move smoother.

To increase the performance of the device with at least two in strapping guide frames provided in parallel vertical planes, between which the closure unit is displaceable is provided according to further features, that the Umreifungsmittelüberleitung between the strap deflection device and the closure unit, preferably forcibly with the Locking unit coupled, pivotally mounted.

Fig. 1

eine schematische Seitenansicht der Vorrichtung zum Umreifen von insbesondere kompressiblem Packgut wie Wellpappelagen od.dgl.,

Fig. 2

eine schematische Aufsicht auf die in Fig. 1 gezeigte Vorrichtung,

Fig. 3

eine Detaildarstellung der Umreifungsmittel-Umlenkung und Umreifungsmittel-Überleitung in Seitenansicht auf die Vorrichtung, und

Fig. 4

eine Ansicht in Richtung des Ansichtspfeils IV in Fig. 3.

Moreover, the invention is understood with reference to the following description of an embodiment. In the drawings show:

Fig. 1

a schematic side view of the device for strapping in particular compressible packaged goods such as corrugated cardboard layers or the like.,

Fig. 2

a schematic plan view of the device shown in Fig. 1,

Fig. 3

a detailed view of the Umreifungsmittel-Umlenkung and Umreifungsmittelüberleitung in side view of the device, and

Fig. 4

a view in the direction of the view arrow IV in Fig. 3rd

A generally designated 10 device for strapping in particular compressible packaged goods 11 as Wellpappelagen od. Like. First comprises a circulating uplifted Umreifungsmittelvorrat 12 with a wound on a drum 13 Strap 14, in particular thermally weldable Plastic tape.

At posts 15, 15 'is a cross member 16 in the direction of Double arrow 17 arranged vertically movable. The cross member 16 forms a pressing plate for compressing the packaged goods 11 from or is their component and stored on its top an aggregate 18 to Formation of a strapping closure, which is why the Unit 18 will be referred to as a closure unit in the future.

The side of the post 15 is a vertical extending strapping guide 28 provided by the from Umreifungsmittelvorrat 12 coming strapping 14 the Closing unit 18 is supplied.

In addition to the Umreifungsmittelvorrat 12 is a Umreifungsmittelspeicher 19 provided. He serves to stock a certain Amount 14 'of strapping 14. This amount of strapping 14' is sufficient for at least one strapping of a packaged goods 11 or for the beginning of a strapping, in which case the additional required Amount of strapping directly to the Umreifungsmittelvorrat 12 is removed. In the latter case, the drum 13 through a drive, not shown, for eliminating their steady-state torque pre-accelerated.

The emerging from the strapping memory 19 or then pulled out of it strapping 14 then enters a generally designated at 31 device which i.a. the strapping 14 feeds into the strap guide 28.

Then, further up, there is a strap deflection 29 and a strap transfer 30. The strapping deflection 29, the strap 14 from the Strapping guide 28 takes over and into the channel-like Trans strapping guide 30 is designated as from the strap 14 freely rotatable roller 37 executed.

While the strapping guide 28 fixed in place or space is arranged, are the Umreifungsmittel-deflection 29, the Umreifungsmittelüberleitung 30 and the closure unit 18 so far Movably connected to the pressure plate 16, as they always together with this in the vertical direction (double arrow 17) movable are. The designed as a roller 37 Umreifungsmittel-deflection 29 is stored on a press bar fixed boom 38.

a. Zur Erst- oder Neubefüllung der Vorrichtung 10 mit Umreifungsmittel 14 oder nach einem Wechsel des Umreifungsmittelvorrats 12 werden die Rollen 26, 32 so angetrieben, dass sie das zunächst von Hand durch den Umreifungsmittelspeicher 19 geführte Umreifungsmittel 14 bei der mit 27 bezeichneten Umreifungsmitteleinspeisung in die Umreifungsmittel-Führung 28, von dort aus über die Umreifungsmittel-Umlenkung 29 durch die Umreifungsmittel-Überleitung 30 und das Verschlussaggregat 18 hindurch in den mit 39 bezeichneten Umreifungskanal und durch diesen hindurch vorschieben, bis das führende Ende des Umreifungsmittels 14 wieder im Verschlussaggregat 18 angelangt ist. Die Rollen 26, 32 haben hier also zunächst allein eine Funktion als Umreifungsmittel-Zuförderrollen.

b. Beim Ausführen einer ersten Umreifung eines Packguts 11 im Anschluss an einen der zuvor beschriebenen Vorgänge wird - bei im Verschlussaggregat festgehaltenem führenden Umreifungsmittel-Ende - der Antrieb der Rollen 26, 32 nunmehr reversiert, d.h. die Rollen 26, 32 werden im umgekehrten Drehsinn angetrieben. Nun ziehen die Rollen 26, 32 das Umreifungsmittel 14 zurück mit der Folge, dass einerseits der Umreifungsmittelspeicher 19 mit einer Umreifungsmittel-Menge 14' gefüllt wird und andererseits das im Umreifungsmittel-Rahmen befindliche Umreifungsmittel 14 aus diesem nach innen zum Packgut 11 hin heraus gezogen und um das Packgut 11 gestrafft wird. Hierbei ist die Funktion der Rollen 26, 32 also die einer Umreifungsmittel-Rückzug- und -Spanneinrichtung. Das Verschlussaggregat 18 fertigt nun den Umreifungsmittel-Verschluss, wie dies grundsätzlich bekannt und üblich ist. (Zur Vermeidung von Missverständnissen sei angemerkt, dass hierbei in Abweichung von der schematischen Darstellung der Fig. 1 der Pressbalken 16 unter Kompressionsdruck oben auf dem Packgut 11 aufliegt).

c. Bei dem darauf folgenden und jedem weiteren Umreifungszyklus der Vorrichtung 10 reicht das Umreifungsmittel 14 bis zu seinem Aufbrauch vom Umreifungsmittelvorrat 12 bis zum Verschlussaggregat 18. Für eine weitere Umreifung werden die Rollen 26, 32 erneut reversiert angetrieben, so dass sie in der Lage sind, das Umreifungsmittel 14 aus dem Verschlussaggregat 18 und um den Umreifungskanal 39 herum vorzuschieben. Da dieser Vorgang gemeinhin mit 'Bandeinschuss' bezeichnet wird, haben die Rollen 26, 32 jetzt also die Funktion von Umreifungsmittel-Einschussrollen. Es folgen nunmehr für jede weitere Umreifung nacheinander die oben mit b. und c. erläuterten Schritte.

The device 31 provided between the strap memory 19 and the strap feed (at 27) into the strap guide 28 comprises two rollers 26 and 32 which can frictionally engage the strap 14 to move it in its both longitudinal directions. These two rollers 26, 32, of which at least one is motor-driven and reversibly driven, have - as explained below - several functions, namely:

a. For initial or new filling of the device 10 with strap 14 or after a change of Umreifungsmittelvorrats 12, the rollers 26, 32 are driven so that they initially guided by hand through the Umreifungsmittelspeicher 19 strap 14 at the designated Umreifungsmitteleinspeisung in the Umreifungsmittel- Guide 28, from there via the Umreifungsmittel-deflection 29 by the Umreifungsmittelüberleitung 30 and the closing unit 18 through in the designated 39 Umreifungskanal and therethrough, until the leading end of the strap 14 is back in the closing unit 18 arrives. The rollers 26, 32 thus initially have only one function here as strapping feed rollers.

b. When carrying out a first strapping of a packaged product 11 following one of the previously described processes, the drive of the rollers 26, 32 is now reversed, with the leading strap end held in the closing unit, ie the rollers 26, 32 are driven in the reverse direction of rotation. Now pull the rollers 26, 32, the strap 14 back with the result that on the one hand, the Umreifungsmittelspeicher 19 is filled with a strapping amount 14 'and on the other hand, located in the strapping frame strap 14 pulled out of this inwardly to the packaged goods out 11 out and to the packaged goods 11 is tightened. Here, the function of the rollers 26, 32 that is a strapping retraction and tensioning device. The closure assembly 18 now makes the strap closure, as is well known and common. (To avoid misunderstandings, it should be noted that, in deviation from the schematic representation of FIG. 1, the pressing bar 16 rests on top of the packaged goods 11 under compression pressure).

c. During the subsequent and each subsequent strapping cycle of the apparatus 10, the strap 14 extends from the strap supply 12 to the closure assembly 18 until exhausted. For further strapping, the rollers 26, 32 are again reversely driven so that they are able to do so To advance strap 14 from the closure unit 18 and around the strapping 39 around. Since this process is commonly referred to as 'tape insertion', the rollers 26, 32 now have the function of strapping rollers. It follows now for each further strapping successively above with b. and c. explained steps.

Before each unreifungsvorgang the press plate 16 is under Pressure from above on the packaged goods 11 lowered. That's what they do Closing unit 18, the Umreifungsmittelüberleitung 30 and the Umreifungsmittel-Umlenkung 29, all movement uniform are connected to the pressing plate 16, whose vertical movements With. The distance of the strap deflection 29 e.g. from the ground changes with the movement of the press plate 16 and is above all also depends on the respective height of the packaged goods 11. Therefore is it is necessary that the strap deflection 29 at each in Question about the height position of the strapping guide 28 can remove the strap 14. For this purpose, the channel-like Strapping guide 28 is an assembly of normally under the action of unillustrated springs of channel enclosing flaps 40 on, each in pairs on both sides of the strapping guide 28 are arranged.

The flap system and its control are shown in FIGS. 3 and 4 more clear. The arrangement is such that with the Umreifungsmittel deflection 29 a carriage 41 in the vertical direction movement unitary connected is. The carriage 41 carries rollers 42, the each on one side (left side in Fig. 3) on the local edges the flaps 40 accumulate and the flaps 40 to the roller 37 down open side, so that the strap 14 (in Fig. 4 and 5 not shown) from the channel of the strap guide 28 emerge and the role of 37 on the Umreifungsmittel-deflection 29 and then in the Umreifungsmittelüberleitung 30 can run. In FIGS. 3 and 4 are the two of the four pairs of flaps shown uppermost, the roller 37 adjacent, shown open while the two channel-forming or channel-closing underneath are closed.

With reference to FIG. 2, it should be mentioned that the one shown there Device is designed as a 'tandem machine', which in Juxtaposed two Umreifungsmittelvorräte 12, 12 ', two Umreifurigsmittelspeicher 19, 19 'and two strapping drive units 31, 31 'and also contains two closure units 18 and 18 'and otherwise all the device elements described like strapping transfers 30, 30 ', Strapping guides and strapping channels. With such Tandem system can thus be parallel spaced at the same time two strappings are performed on a packaged goods. Even a triple arrangement is conceivable and already proven.

Fig. 2 also shows a tandem system, with a Packaged goods 11 are strapped in different parallel distances can. For this purpose, the closure unit 18 is provided in the transverse direction (Double arrow 42) to be able to proceed. The strapping transfer 30 is on the one hand with the closing unit 18th and on the other hand, with the strap deflection 29 (FIG. 1). pivotally connected so that the strapping path of the Transverse displacement of the closing unit 18 automatically follow can. In the second position level of the closure unit 18th (dashed lines in Fig. 2) is therefore another on the machine frame Strapping frame 39 'provided.

For the final understanding are some details of the Device 10 explains, even if it is the actual invention directly not concern.

Both the posts 15, 15 'and the cross member 16 are Strapping guides in the form of straight channels or Channel sections and corner diversion associated with known design. It is also known that the portal-like Umreifungsmittelführungskanalgebilde thereby becoming a self-contained strapping frame form, that on the bottom side the packaged goods 11 or the Pallet on which it rests, under-lance or a bayonet 24, which contains a straight strapping guide channel, is provided. With regard to such arrangement and design is referred to the aforementioned EP 0 681 958 B1.

Claims (8)

Apparatus for strapping in particular compressible packaged goods (11), such as corrugated cardboard layers or the like, by means of a band-shaped strapping means (14), in particular a thermoplastic plastic band, with
a strap stock (12),
at least one strapping guide frame arranged in a vertical plane,
a press plate (16) for compressing the packaged product (11),
Strapping conveyor rollers (32) for tightening the strapping means (14) around the packaged goods (11),
a closure unit (18) for the ends of the strapping means (14) tightened about the packaged goods (11),
a strapping memory (19) for providing a strapping amount for the closing unit (18),
a strapping feed (27),
a strap feed device (25) between the strap supply (12) and the strap feed (27) and
a strap guide (28) between the strap supply (12) and the closure assembly (18), wherein
the closure unit (18) is arranged to be vertically movable with the press plate (16),
while the strap supply (12) is arranged near the bottom, laterally outside the strapping zone and the pressure plate (16),
the strap guide (28) comprises at least one channel-like strap transfer passage (30) leading to the lock assembly (18), and
the strap feed (27) is accessible from the outside of the device on which the strap stock (12) is located and associated with a lower portion of a strap guide channel (28) extending vertically adjacent a post (15) of the strapping frame , along which a Umreifungsmittel-deflecting device (29) for transferring the strap (14) in the Umreifungsmittel-transfer line (30) synchronously with the pressure plate (16) is guided adjustable in height and the strap guide channel (28) on its side facing the Umreifungszone by the movement of the strap deflection device (29) has automatically openable channel closure means.
characterized in that
in that the strap feed device (25) at the same time comprises the strap conveying rollers (32) and the strap store (19), adjacent to the strapping device (12), is arranged laterally outside the strapping zone. Device according to claim 1, characterized in that the strapping supply device (25) advances the strapping means (14) both to the closing unit (18) and advances therethrough along the strapping guiding frame (20-24) and around the packaged goods (20). 11) tightens. Apparatus according to claim 1 or 2, characterized in that the Umreifungsmittel Zufördervorrichtung (25) comprises a reversible pair of rollers (32) which is alternatively drivable as Umreifungsmittel-Einschuss roller pair or as Umreifungsmittel-withdrawal roller pair. Apparatus according to claim 1, characterized in that the Umreifungsmittelüberleitung (30) by the shortest route and immediately the strap (14) from the Umreifungsmittel-deflecting device (29) the closure unit (18) supplies. Device according to one of claims 1 to 3, characterized in that the Umreifungsmittelspeicher (19) - viewed in the direction of the strapping (28) - between the Umreifungsmittelvorrat (12) and the Umreifungsmittelzufuhr (27) is arranged and that the filling of the Umreifungsmittelspeichers (19) when Umreifungsmittelrückzug by means of the Umreifungsmittel feed device (25). Apparatus according to claim 1 or 4, characterized in that the Umreifungsmittel-deflecting device (29) comprises a Umreifungsmittel deflection roller (37) which is rotatably mounted on the pressing plate (16) and by means of a on the Umreifungsmittelführung (28) longitudinally movable carriage ( 41) serially opens the channel closure means formed by closing-spring-loaded flaps (40). Device according to one of the preceding claims, with at least two provided in parallel vertical planes Umreifungsmittel guide frame, between which the closure unit (18) is displaceable, characterized in that the Umreifungsmittelüberleitung (30) between the Umreifungsmittel-deflecting device (29) and the closure unit (18) is arranged in each case pivotally. Apparatus according to claim 7, characterized in that the Umreifungsmittelüberleitung (30) is forcibly pivotally coupled to the closure unit (18).

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