WO2008128661A1

WO2008128661A1 - Strapping machine

Info

Publication number: WO2008128661A1
Application number: PCT/EP2008/002879
Authority: WO
Inventors: Andreas Dufeu; Bernhard Mettendorf
Original assignee: Cyklop Gmbh
Priority date: 2007-04-24
Filing date: 2008-04-11
Publication date: 2008-10-30
Also published as: AU2008241021A1; DE102007019605A1; ATE509835T1; EP2146900B1; EP2146900A1; US20100242419A1; DK2146900T3; RU2405722C2; DE102007019605B4

Abstract

In the strapping machine (10) according to the invention, in which a strap guiding lance is inserted under the packaged goods through a penetrating opening provided in a pallet in order to create a circumferential strap channel into which a strap (12) can be shot to produce a strapping, a particularly strong, but also lightweight design of the strap guiding lance (23) is proposed, allowing rapid and precise insertion of the lance.

Description

Title: Strapping machine

The invention relates to a strapping machine for strapping packages with strapping, with a to umreifendes package about portal-like on two upright sides and a top band surrounding bow and with a displaceable under an underside of the package tape guide lance, wherein the tape guide bow and the tape guide lance in the below Package shifted position to form a circulating around the Packstύck tape guide channel for the strapping, which is covered at its sides facing the package of an outlet of the Umrei- tion band from the Bandfuhrungskanal in the direction of the pack stucco gestattenden cover.

For strapping packages with strapping various techniques and equipment are known. One of the simplest methods is to put the strapping band - nowadays generally a plastic band made of polypropylene - by hand around the package and thread the two band ends into a hand-operated device, with which they are braced against each other and then firmly connected by means of a Reibschweißeinrichtung. In particular, when a plurality of packages are to be strapped, which are transported in succession, for example by means of a Rollenforderers, strapping are used, in which the tape no longer needs to be placed by hand around the Packstύck, but injected into a circulating around the package to be packaged band channel is, from the out then out in the direction of the package under brief opening of the band channel first covering the closure flaps or the like. is pulled out when the band ends are braced against each other. In particular, large packages, which are, for example, machine parts, fabric balls or the like. can be often supplied to transport pallets of the strapping machine, the Umrei- tion bands to connect the package to be packaged firmly to the pallet, but without the strapping should be pulled around the bottom or the bottom surface of the pallet. Rather, it is desirable that the strap is threaded through a space between the top of the pallet and the lower Abstellkufen the pallet, which makes it necessary to open the band channel before the arrangement of the on-pallet package in the strapping machine at the level of the pallet and then close again upon reaching the desired position of the package in the machine to the circulating around the package band channel, so that the tape can then be injected around the entire package around in the band channel and then stretched and closed, the package firmly with the Pallet is connected. To make such a strapping in a strapping machine, this is provided with a transversely to the package below this movable tape guide lance, which moves to the correct placement of the package-carrying pallet between the lower runners and upper support side and in this retracted state together with which the package portal-like overlapping band guide floor forms the circumferential band guide channel. After completion of the strapping the tape guide lance is then pulled out again laterally from the pallet and then connected to the strapping band fixed to the pallet can be removed from the strapping machine.

Since the tape guide lance must be inserted freely cantilevered under the package in the comparatively narrow space between the pallet top and pallet skids, it is necessary to give it a high rigidity to prevent sagging or swinging during the process. For this reason, in the past, the required stiffness band guide lances have always been very heavy components that did not allow a high travel speed and especially large accelerations, so that both the entry and the extension Belt guide lance passed comparatively much time in which the package had to remain unmoved in place in the strapping machine. Although the actual strapping process, ie the shooting of the tape in the tape guide channel, the tensioning of the tape around the package and the welding, in a very short time, the achievable number of cycles, ie the number of strappings to be performed on different packages per unit time, with a Such machine comparatively low. Particularly problematic was in the known tape guide lance in particular, that the required rigidity was reached only by a comparatively large height of the lance, which at the same time an even greater minimum height of the gap between the top of the pallet and pallet skids was demanding, through which the tape guide lance had to be moved.

The object of the invention is to improve a strapping machine of the type mentioned in that the tape guide lance can be pushed at high speed under a package, in particular in a pallet and withdrawn from this position again, without causing the risk of sagging of the lance or a Aufschwingens, in particular, the smallest possible height of the tape guide lance should be possible.

This object is achieved with the invention in that the tape guide lance consists of a cross-sectionally approximately U-shaped, open towards the package carrier profile, which extends over the length of the band channel portion of the tape guide lance, preferably even over the entire length of the tape guide lance Stiffening angle is provided, which is arranged over a partial width of the carrier profile between a first side legs and the lower connecting web of the carrier profile, wherein the cover for the band channel portion of the band guide lance on the upright side wall of the stiffening angle is arranged and extending parallel to the connecting web top of the stiffening angle to form the band channel portion covered at a distance. This special structural design of the tape guide lance allows a particularly light, yet very rigid construction of thin-walled profiles or sheets, which at comparable, if not significantly better stability than in the known constructions significantly reduces the mass of the tape guide lance to be moved and thus and extending the lance greater speeds and in particular larger accelerations than in the previously known machines allowed. This high rigidity and low weight is also achieved with a very straightforward and easy-to-manufacture construction, in which the carrier profile is provided in its upwardly open interior at its one side leg and its lower connecting web with the asymmetrically arranged stiffening angle, which for example by application Laser welding can be done with the highest accuracy. Apart from the cover for the band channel and serving for their attachment elements, the band guide lance consists essentially only of two interconnected in a particularly advantageous arrangement of components, namely the U-shaped support section and the asymmetric, ie offset to one side arranged stiffening angle.

It has proved to be particularly advantageous if the lower connecting web of the carrier profile is provided in its laterally adjacent to the stiffening angle portion with distributed over its length arranged passage openings, on the one hand have the effect of further reducing the overall weight of the lance, the beyond but also ensure trouble-free removal of plastic parts or other impurities occurring as abrasion from the strapping band, which can fall from above into the U-shaped carrier profile. Such contaminants may also be abrasion of the objects to be strapped, such as stone, clay or concrete particles when strapping stones or roof tiles. Since such contaminants immediately escape downwardly through the passage openings out of the carrier profile, it is ensured that they do not accumulate in the profile and as a result may possibly hinder the proper functioning of the cover opening during clamping of the strapping band. The cover of the band channel portion of the band guide lance can be formed in an advantageous embodiment of the invention of hingedly arranged on the support profile and / or the stiffening angle flap elements. A particularly easy to install and also very reliable embodiment results in so far as the flap elements create in their closed position with a first leg of the upright side wall of the Versteifungswinkeis and with a second, extending at right angles from the first angle leg the top of the stiffening angle under training cover a gap forming the band channel. The flap elements can be kept, for example, by means of spring elements in their closed position, wherein they open during tensioning of the strapping and the emergence of the belt from the belt channel transversely to the tape longitudinal direction against the action of the springs and close immediately after the exit of the tape again. The spring elements can consist of compression springs arranged between the flap elements and the second side leg of the carrier profile, which hold the first legs of the flap elements pressed against the upright side wall of the stiffening angle, as long as the strip is not pressed against the second leg of the flap element as a result of the tensioning process press and this opens thereby. In order to keep the springs reliably in place and to provide them a kinking of the springs preventing guidance, can be provided transversely to the side walls extending arranged, the flap elements with clearance passing through guide pins for the compression springs.

Preferably, the tape guide lance is provided at the end portions of the band channel formed by her Bandumlenkelementen for connection to the tape guide bow, which reliably deflect the strapping tape inserted into the band channel in the lower corner regions of the band channel. It is particularly advantageous if the Bandumlenkelemente are interchangeable, because then they can be optimally adapted not only for different bandwidths, but it is also m simple way possible, the Bandumlauf- or Einschußrichtung by replacing the suitably bolted to the lance Bandumlenkelemente for the one - or discontinuation to change. Further features and advantages of the invention will become apparent from the following description and the drawing, wherein a preferred embodiment of the invention is explained in more detail by way of example. It shows:

1 shows a strapped with two strapping with a strapping machine according to the invention package in perspective,

Fig. 2 shows a strapping machine according to the invention in a front view;

3 shows a section of a tape guide lance for the strapping machine according to FIG. 2 in a connection region on the tape guide sheet in a side view; FIG. and

Fig. 4, the tape guide lance of Fig. 3 in section along the line IV-IV in an enlarged view.

Fig. L shows a package 10 which is arranged on a pallet 11 and secured on this with two straps 12. The strapping bands run in a direction Q transverse to the longitudinal direction L of the package. They run along the upper side 13 and the two upright side surfaces 14, 15 of the package and are guided on its underside by located in the pallet 11 piercing openings 16 so that they hold the package firmly with the pallet. The puncture apertures generally have a height dimensioned to allow the fork of a forklift to be inserted into it to lift and transport the pallet with the package secured thereon and secured by the strapping bands.

To produce the strapping 12 on the package shown in Fig. 1 is the strapping machine, which is somewhat simplified in Fig. 2 is shown. The strapping machine 17 has a rectangular machine frame 18, whose uprising posts 19 in Ab- stood from each other on machine foundation beam 20 are connected. Between the two foundation beams, a roller conveyor 21 is provided, on which the package 10 is transported in the longitudinal direction into the strapping machine and transported out again after completion of the strapping.

To produce the strapping, the strapping machine is provided in a known manner with a belt guide sheet 22 arranged in the machine frame, which surrounds the package 10 like a portal on the two upright side surfaces 14, 15 and the upper side 13 and forms three sides of a circulating band channel into which The Umreifungsband injected in a manner not shown and so can be placed around the package around. To complete the band channel at the bottom of the package, the machine has a transverse to the longitudinal direction slidably arranged tape guide lance 23 which forms the running under the underside of the package band channel portion in the under the package through the puncture opening 16 in the palette inserted position of the tape guide lance completed the tape guide arc to the circulating band channel. The tape guide lance 23 is located in a rest position laterally next to the machine so that it does not hinder the unimpeded transport of the pallet with the package arranged thereon. When the package has reached the desired position in the machine in which it is to be strapped, the tape guide lance 23 moves from the side through the corresponding piercing opening 16 in the pallet under the package until it reaches its end position in which the tape guide channel to the Package is completely closed and the tape can then be injected into these in the known manner.

The special design of the tape guide lance 23, which is to be pulled out with the highest possible speed under the package through the puncture hole in the pallet and out of this and the w.egen of the thereby freikragenden arrangement must be particularly stiff to at their retraction and extension not to hang, is the subject of the present invention, - it is shown in Figs. 3 and 4 in more detail. It can be seen that the tape guiding lance 23 consists of a carrier profile 24 that is approximately U-shaped in cross-section and thus open towards the package 10, which is provided with a stiffening angle 26 extending over the length of the belt channel section 25 on the tape guiding lance is, which is arranged over a partial width of the carrier profile 24 in the interior between a first side legs 27 and the lower connecting web 28 of the carrier profile 24. To form the band channel section 25 in the band guide lance, the upper side 29 of the stiffening angle 26 is provided with a cover 30 consisting of a plurality of flap elements 31 arranged one behind the other over the length of the band channel section, which are essentially formed by angle plates which are articulated to the stiffening angle 26 are. The arrangement is such that the flap elements create in their closed position with a first leg of the upright side wall 33 of the stiffening angle 26 and with a second, at right angles from the first leg 32 extending horizontal leg 34, the top 29 of the stiffening angle to form the band channel cover forming gap 25.

In order to keep the flap elements 31 in their closed position, compression springs 36 are arranged between their first legs 32 and the second side leg 35 of the carrier profile, which hold the flap elements under slight bias against the stiffening angle. The compression springs lead around guide pins 37, which are arranged transversely to the side legs 27, 35 of the carrier profile extending and enforce the flap elements in associated holes 38 with clearance.

3 and 4 can also be clearly seen that the lower connecting web 28 of the carrier profile 24 is provided in its laterally adjacent to the stiffening angle portion 39 distributed over its length arranged passage openings 40, each interrupted only by comparatively narrow webs 41 are. At the one end region of the band channel section 25 formed by the band guide lance 23 (the left end region shown in the drawing (FIG. 3)), the lance is provided with a band deflection element 42, which ensures that the strapping band 12 inserted into the band channel is deflected from the band channel section in the band guiding lance into the band guiding bow 22 or from this into the band guiding lance. Dasa band deflecting elements can be in or out for the emptying and outfeed of the strapping band The Bandfuhrungslanze be designed differently It is simply clamped with clamping screws between the two rare legs 27, 35 of Tragerprofils and can be removed and replaced with little effort hereby

The inventive design of the belt guiding lance, which consists essentially of simple, thin-walled sheet-metal profile elements which are joined together by laser welding and laser cutting processes, creates a particularly light, yet very stable, rigid construction, which allows the belt lance to have high acceleration values move and quickly underneath the pack through the pallet to close the Bandfuhrungsbogens and herauszuverfahren after completion of the strapping back from the transport value. In operation, the Durchlaßoffnungen 40 reliably prevent that put dirt particles such as plastic residues or abrasion of the strapped goods in the carrier profile 24 and the laterally next to the flap elements forming space clog plastic particles can be caused for example by abrasion from the strapping 12 used for the generation of the strapping around the pack stucco is drawn inwards from the band channel (arrow 43 in FIG. 4), the flap elements opening as shown by dashed lines due to the tensile force acting on the strapping band so as to pass through immediately after the band has passed through close the then open band channel under the action of the compression springs again

The invention is not limited to the exemplary embodiment shown and described, but various changes and additions are conceivable without departing from the scope of the invention. Thus, the cover of the band channel does not have to be effected by substantially rigid flap elements which are mounted in an articulated manner with respect to the stiffening angle, but it is conceivable to use a flap in this case. xible profile strip of a rubber-like material, plastic or the like. provide, which then does not have to be divided over the length of the band channel section. It is also readily conceivable to provide the strapping machine with a plurality of strapping stations of the type described if, for example, it is desired to produce two strappings as shown in FIG. 1 at the same time on the package. The machine can also allow in a known manner a rotation of the packing block located on the pallet in the region of the strapping station, in order thereby to be able to place a further strapping over the end faces of the package.

Claims

Claims :

1. A strapping machine for strapping packs with a strapping band, with a package to be wrapped approximately portal-like on two upright sides and a top surrounding band guide bow and with a slidable under a bottom of the pack tape guide lance, the band guide bow and the tape guide lance in which the position displaced under the package forms a band guide channel for the strapping band which revolves around the package and is covered at its inner side facing the package by a cover which allows exit of the strapping band from the band guide channel in the direction of the package, characterized in that the band guide lance (23) consists of a cross-sectionally approximately U-shaped, to the package (10) open towards carrier profile (24) which is provided with a over the length of the band channel portion (25) on the band guide lance (23) extending Versteifungswmkel (26) , of the A partial width of the carrier profile (24) between a first rare leg (27) and the lower connecting web (28) of the carrier profile (24) is arranged, wherein the cover (30) for the band channel portion (25) of the tape guide lance (23) on the upright Side wall (33) of the stiffening angle (26) is arranged and the parallel to the connecting web (28) extending upper surface (29) of the stiffening angle (26) to form the band channel portion (25) covered at a distance.

2. strapping machine according to claim 1, characterized in that the lower connecting web (28) of the carrier profile (24) in its laterally adjacent to the Versteifungswmkel (26) portion (39) distributed over its length arranged Durchlaßόffnungen (40) is provided.

3. strapping machine according to claim 1 or 2, characterized in that the cover (30) of the band channel portion (25) of the band guide lance (23) of articulated on the carrier profile (24) and / or at the stiffening angle (26) arranged flap elements (31) is formed.

4. strapping machine according to claim 3, characterized in that the flap elements (31) in its closed position with a first leg (32) on the upright side wall (33) of the stiffening angle (26) and create a second, perpendicular to the first leg (32) extending leg (34) cover the top (29) of the stiffening angle (26) to form a band channel portion (25) forming the gap.

5. strapping machine according to claim 3 or 4, characterized in that the flap elements (31) by means of spring elements (36) are held in its closed position.

6. Strapping machine according to claim 5, characterized in that the spring elements (36) consist of between the flap elements (31) and the second side legs (35) of the carrier profile (24) arranged compression springs.

7. strapping machine according to claim 6, characterized by transversely to the side legs (27, 35) extending arranged, the flap elements (31) with clearance passing through guide pins (37) for the compression springs (36).

8. Strapping machine according to one of claims 1 to 7, characterized in that the tape guide lance (23) at one end portion of the band channel portion (25) formed by it with a Bandumlenkelement (42) for connection to the tape guide bow

(22) is provided.

9. strapping machine according to claim 8, characterized in that the Bandumlenkelement (42) is interchangeable.