EP1517836B1 - Strapping device - Google Patents

Abstract

A strapping installation, which serves in particular for longitudinally strapping stacks of printed products such as newspapers or periodicals with a strap ( 6 ), includes a strapping position with a bearing surface ( 2 ) and a device for positioning the objects to be strapped ( 1 ) in the strapping position and a device for discharging the strapped objects. The strapping position includes a fastening region ( 3 ), situated below the bearing surface ( 2 ) and equipped for feeding the strap ( 6 ) into a loop channel ( 4 ), securing one end of the strap loop ( 7 ), retracting the strap ( 6 ) from the loop channel ( 4 ), and fastening and severing a completed strapping. The installation also includes a loop guide ( 10 ), which is stationary during strapping, which rises from the bearing surface ( 2 ) inside of the loop channel ( 4 ) and beside the strapping position, and which arches across or towards the strapping position.

Description

The invention is in the field of packaging technology and relates to a strapping device according to the preamble of the independent claim. The strapping device is used for strapping objects, in particular substantially cuboidal objects, e.g. of stacks of printed products such as newspapers, magazines, etc., and it serves in particular for a substantially simultaneous strapping in two mutually perpendicular directions (cross strapping). For strapping, use is made of a strapping material, which may be in the form of a band (strapping) or the form of a cord or wire, and which is advantageously stiff enough to be slidably moved.

For an automatically performed such strapping an object to be strapped is supported on a support surface in a strapping position, positioned in the strapping position and strapped and then transported away from the strapping position. Usually, the strapping material, which is supplied, for example, from a supply spool from below against the strapping position, in the region of the strapping position is formed into a loop which is larger than the strapping to be created and which has a position from which it can be laid around the object to be strapped , This loop is then placed by pulling the tape around the object to be strapped, strained, usually closed below the object and separated from further supplied strapping material.

The presentation of the loop for a Längsumreifung (strapping parallel to the conveying direction) is less feasible than the presentation of a loop for a Querierreifung (strapping transversely to the conveying direction), because the longitudinal loop spans in its final position, the feed path of the object to be strapped, so at the conveyance of the object does not occupy this position. Various methods for presenting a longitudinal loop such that the object to be strapped can still be promoted after or advantageously during the presentation of the loop in the Umreifungsposition belong to the prior art.

Such a method is described in the publication EP-1207107, in which a groove-shaped loop channel integrated in the bearing surface is proposed for the presentation of the loop. The loop is thus submitted under the support surface in a horizontal orientation, where it does not interfere with the conveyance of the object to be strapped. Once the object to be strapped is positioned in the strapping position, the loop is lifted out of the loop channel by means of loop movement means and brought into a vertical position such that it leads around the object to be strapped. From this position, the loop is created by tightening the strapping material against the object and tensioned. As a loop moving means grippers are proposed, which are positioned before the loop movement in the regions of the groove-shaped channel and the loop movement along with the loop along suitable rails to the side of the object to be hooped and driven over the object to be strapped. The grippers are very small parts to be accelerated and can therefore be moved very quickly.

Another method is described in publication US-5078057 (or DE-4100276, Signode Corp.). This publication discloses a substantially simultaneous longitudinal and Querierreifung (cross strapping). For both strappings are ever a loop channel is provided, wherein the longitudinal channel arches laterally from the object to be strapped over the support surface and the upper part of the arch curves over an object positioned to be strapped in the strapping position, such that the sheet does not provide the delivery path for the object obstructed and the loop presented anyway partially extends over the object positioned for strapping. This shape of the longitudinal channel makes it necessary, at least for a band-shaped strapping material, that the loop channel is not only bent but also twisted, that is to say a machine part that is rather complicated to manufacture.

The invention now has the object to provide a strapping, with the simplest way, with a minimum of moving parts and still with short cycle times strapping by means of laid loop of the strapping material are feasible, in particular Längsumreifungen, in a simple manner with a essentially simultaneous Querumreifung can be combined.

This object is achieved by the strapping device as defined in the patent claims.

The strapping device according to the invention, like the strapping devices according to EP-1207107 and US-5078057 in the strapping position on a closing area under the support surface in which a loop channel begins and ends, in which the strapping material for looping is fed into the loop channel in which the the loop channel guided, free loop end is held, in which the strapping material is withdrawn to reduce the tension and the loop of the loop channel and in which closed the strapping and separated from further supplied strapping material becomes. The loop channel, which is substantially formed as a groove in the support surface, runs in two opposite directions from the Schliessbereich starting from the Umreifungsposition and closes around the Umreifungsposition (or to the largest floor plan of an object to be strapped) around. The closing area is located, for example, in the center under an object to be strapped and, for longitudinal strapping, the beginning and end of the loop channel run parallel to the conveying direction.

Unlike the strapping device according to EP 1207107, the strapping device according to the invention has a stationary loop guide (at least during strapping) which rises from the support surface within the loop channel and on one side from an object to be strapped in the strapping position and moves as required the direction of feeding the object to be strapped over or against the strapping position buckles, such that the supply of an object to be strapped is not hindered by the loop guide. This loop guide is arranged and dimensioned such that the loop provided in the loop channel, the end of which is retained in the closing area, is lifted out of the channel during withdrawal of the strapping material and slips up the loop guide until it is positioned above the object positioned for strapping Loop guide falls and is pulled around the object and stretched. Thus, as the loop rises from the loop channel and along the loop guide as it falls from the leading end and is placed around the object to be strapped and tensioned, the loop is continually reduced by retraction of the strapping material.

The loop guide is thus arranged and dimensioned such that a loop which is positioned below the object to be strapped in the loop channel and is held by the loop guide ever higher above the support surface, a having increasing height over the support surface continuously decreasing length.

A longitudinal strapping using the device according to the invention is carried out in the following manner. In the groove-shaped loop channel, for example, by inserting a free end of the strapping material from the closing area forth until the closing area where the loop end is held, presented a loop. For less stiff strapping materials, means may also be provided for pulling the strapping material into the loop channel.

If possible simultaneously with the presentation of the loop, the object to be strapped is guided into the strapping position and positioned there. Once the loop in the loop channel presented, that is, the free end of the strapping material is held in the closing area, and the object to be strapped is positioned in the strapping position, the strapping material is retracted in a direction opposite to the feed direction, i. the loop is reduced or shortened, rising up out of the channel and along the loop guide where the channel is not under the object to be strapped, until it falls from the top of the loop guide and settles around the positioned object. Then the loop is tensioned in a conventional manner, sealed and separated from further supplied strapping material.

If necessary, and in particular if the object to be strapped is small in relation to other objects to be strapped, retraction of the strapping material can already be started if the object has not yet been completely conveyed into the strapping position.

The main advantage of the device according to the invention is that the loop channel has a considerably simpler shape than is the case according to publication US-5078057 and that nevertheless no special, movable device parts according to publication EP-1207107 are to be provided for moving the loop. The means for retracting the strapping material, which must be provided for tightening the loop around the object to be strapped in each case, additionally assumes the function of loop positioning.

In the event that the strapping material is band-shaped, that is, not or not well bendable in the direction of its width, the equipment of the closing area and the loop channel are so matched to one another that the band is aligned in the groove-shaped channel with its width perpendicular to the support surface , at least in those areas where the channel has bends. This can be realized in essentially three ways. Either the closing area is equipped in a manner known per se for the unchangeable holding of the strapping band with its width parallel to the supporting surface and the loop channel advantageously has a torsion of 90 ° immediately before and after the closing area. Or the closure portion has a rotatable band holder which is held in a rotational position during the presentation of the band loop in which the bandwidth is aligned perpendicular to the support surface and which rotates during retraction of the band in a rotational position in which the bandwidth parallel to Bearing surface is aligned. In this case, the loop channel needs no twisting. For the third type of realization of the closing area is equipped for an unchangeable support of the tape with its width perpendicular to the support surface and the tape is advantageously fed with this orientation. To close the loop, the tape is held in this position and first lay flat around the strapped object when it is removed from the strapping position.

Figur 1

eine dreidimensionale Darstellung der Umreifungsposition einer beispielhaften Ausführungsform der erfindungsgemässen Umreifungsvorrichtung;

Figur 2

ein Querschnitt durch einen beispielhaften, nutförmigen Schlaufenkanal für die erfindungsgemässe Umreifungsvorrichtung;

Figuren 3A und 3B

ein weiteres Beispiel eines nutförmigen Schlaufenkanals für die erfindungsgemässe Umreifungsvorrichtung in geschlossenem Zustand (Figur 3A) und in offenem Zustand (Figur 3B);

Figuren 4A und 4B

zwei Varianten des Verlaufes eines bandförmigen Umreifungsmaterials durch den Schliessbereich und im nutförmigen Schlaufenkanal der erfindungsgemässen Umreifungsvorrichtung;

Figuren 5 und 6

eine Seitenansicht (Figur 5) und eine Draufsicht (Figur 6) auf eine weitere, beispielhafte Ausführungsform der erfindungsgemässen Umreifungsvorrichtung, die für eine Kreuzumreifung ausgerüstet ist;

Figur 7

Pressmittel und weitere Führungsmittel für das Umreifungsmaterial der Längsumreifung in der Umreifungsvorrichtung gemäss Figuren 5 und 6 in einem vergrösserten Massstab (Seitenansicht);

Figuren 8 und 9

eine weitere, beispielhafte Ausführungsform der erfindungsgemässen Vorrichtung mit Blickwinkel parallel zur Wegförderrichtung (Figur 8) und als Draufsicht (Figur 9).

Exemplary embodiments of the strapping device according to the invention will be described in detail with reference to the following figures. Showing:

FIG. 1

a three-dimensional representation of the strapping position of an exemplary embodiment of the inventive strapping device;

FIG. 2

a cross-section through an exemplary groove-shaped loop channel for the strapping device according to the invention;

FIGS. 3A and 3B

a further example of a groove-shaped loop channel for the inventive strapping device in the closed state (Figure 3A) and in the open state (Figure 3B);

FIGS. 4A and 4B

two variants of the course of a band-shaped strapping material through the closing area and in the groove-shaped loop channel of the strapping device according to the invention;

FIGS. 5 and 6

a side view (Figure 5) and a plan view (Figure 6) on a further exemplary embodiment of the inventive strapping device, which is equipped for a Kreuzumreifung;

FIG. 7

Pressing means and further guide means for the strapping material of the strapping in the strapping device according to Figures 5 and 6 in an enlarged scale (side view);

FIGS. 8 and 9

a further exemplary embodiment of the inventive device with a viewing angle parallel to the Wegförderrichtung (Figure 8) and as a plan view (Figure 9).

FIG. 1 shows the strapping position of an exemplary embodiment of the strapping device according to the invention. This is equipped for a central Längsumreifung an object 1, which is conveyed in a substantially horizontal conveying direction F on a support surface 2 in the Umreifungsposition and after strapping back in the conveying direction F from the Umreifungsposition addition. In the strapping position, the closing area 3 is set in a corresponding recess of the support surface 2 below the level of the support surface. From the closing area 3 extends parallel to the conveying direction F in both directions a recessed into the support surface 2, groove-shaped loop channel 4, which closes on one side to the floor plan 5 of a largest object to be strapped around. The closing area 3 is equipped in a manner known per se, not shown, for supplying a strapping material 6 (shown as a strapping band) in a feeding direction Z in the loop channel 4, for holding the free end 7 of the strapping material, for withdrawing the strapping material one of the feed direction Z opposite direction R, for tensioning the strapping material around the object to be strapped 1, for closing the loop around the object to be strapped and for separating the loop of further supplied strapping material.

Furthermore, the strapping position has a loop guide 10, which here has the shape of two inside the loop channel 4 and laterally from the strapping position of the support surface 2 rising and arching over the strapping position slide rails 10.1 and 10.2. These slide rails 10.1 and 10.2 guide up the loop of the strapping material 6 provided in the loop channel 4 when the loop is reduced by retraction of the strapping material (direction R).

The loop made of the strapping material 6 is shown in four consecutive positions. With 6.1, the initial position shown in solid is the Designated loop in which the strapping material 6 is located in the loop channel 4. With 6.2 to 6.4 compared to the loop 6.1 by retraction of the strapping material 6 in the direction R more and more shortened loops are shown in phantom. The loop 6.2 has risen by shortening out of the loop channel 4 and on the slide rails 10.1 and 10.2. The loop 6.3 has reached the end of the slide rails 10.1 and 10.2 by further shortening and will be released on further shortening of these and put on the object to be strapped 1, as shown with the loop 6.4.

The Umreifungsposition shown in Figure 1 is equipped for a Längsumreifung when the conveying direction is the illustrated direction F. From the figure it is clear that the conveying direction can also extend transversely to the illustrated direction F and that the strapping position is then equipped for Querumreifung. Furthermore, it can be seen from Figure 1 that an object to be strapped, if it is dimensioned accordingly, or if the loop channel 4 and the slide rails 10.1 and 10.2 are arranged accordingly, can also be brought from above into the Umreifungsposition, that is with a feed direction, which does not correspond to the conveying direction F, but for example, is aligned transversely thereto. A corresponding embodiment of the device according to the invention is shown in FIGS. 8 and 9.

The loop guide 10 can also have a plurality of slide rails instead of the two slide rails 10.1 and 10.2 shown in FIG. 1, or it can be designed as a single, flat element. In any case, the loop guide 10 rises within the loop channel 4 and on one side of the strapping position from the support surface 2 and arches over or against the strapping position, such that its upper end is positioned approximately above the closure region 3, for example. The outside of the loop guide 10 is equipped for a sliding movement of the strapping material.

Figure 2 shows in cross-section an exemplary embodiment of the groove-shaped loop channel 4, which is embedded in the support surface 2 of the strapping device according to the invention, and a lowermost portion of the loop guide 10. Left in the figure, the inside of the loop (side of the loop guide 10), the right outside. When used in the loop channel 4, a relatively stiff strapping band used as a strapping material 6 abuts against the outer wall 4.1 of the channel at least in the region of channel curvatures. As the tape is withdrawn and the loop diminishes, the tape attaches to the inner wall 4.2 of the channel (position 6.4 of the strapping material) and then exits the channel and is guided by the loop guide 10 as it continues to rise (position 6.5 of the strapping material) , It is advantageous to design the inner wall 4.2 of the loop channel 4 obliquely against the loop guide 10 and to arrange the loop guide 10 in such a way that its outer side directly adjoins this channel inner wall 4.2, as shown in FIG.

FIGS. 3A and 3B again show in cross-section a further, exemplary loop channel 4 which can be closed (FIG. 3A) and opened (FIG. 3A) with a displaceable closure element 12. In its closed position, the loop channel allows easy passing of the object to be strapped.

It is quite possible to design the loop channel 4 shown in FIG. 1 in its curved regions, as shown in FIG. 2, and in its rectilinear regions, in particular where it extends transversely to the conveying direction, in the direction shown in FIGS and Fig. 3B.

Figures 4A and 4B show a plan view of the support surface two variants, according to which a band-shaped strapping material 6 can be arranged in the loop channel and through the closing area. It is ever a belt loop shown and very schematically the closing area 3, in which the strapping material 6 fed into the loop channel (direction Z), the free end 7 held and the strapping material 6 is withdrawn from the loop channel (direction R) is. The loop channel is not shown.

According to FIG. 4A, the strapping band 6 is oriented along its entire loop length with its width perpendicular to the contact surface, that is to say the loop channel has no torsions. To avoid twisting of the strapping band, the closing area can be equipped for a rotation of the band during the movement of the loop around the object to be strapped. For this purpose, a tape holder is provided, which is rotatable by at least 90 °. The band holder consists, for example, of a welding head 13 and an anvil 14, between which the free end 7 of the strapping band and the loop closing portion thereof are held during the tightening of the loop and also during the closure of the loop. During the presentation of the loop, the strapping band 6 is held in the position shown in FIG. 4A (bandwidth perpendicular to the support surface). During shrinking and rising of the loop, the welding head 13 and the anvil 14 rotate together until the width of the strap is aligned parallel to the support surface. In this position, the loop is closed by welding.

The rotatability of the tape holder may be active or passive depending on the stiffness of the strapping. The rotatable band holder advantageously has elastic return means, by which the band holder, as soon as the strapping band is removed therefrom, is rotated back into the starting position.

If a strapping is used, which is relatively well elastically deformable, can be dispensed with the above-described, rotatable band holder. In such a case, the strap is held in the closing area 3 permanently in a position in which its width is aligned perpendicular to the support surface. As a result, it is wound more and more during the ascent of the loop and remains even during the tightening of the loop around the object to be strapped and wound when closing the loop. The twisting dissolves only when the strap is released after completion of the strapping of the strap holder.

FIG. 4B shows a closing region 3, which is equipped for an unchangeable holding of the strapping band 6 with its width parallel to the supporting surface. In such a case, it is necessary, the loop channel advantageously in areas 15, which connect directly to the closing area 3, to make each 90 ° twisted.

Figures 5 and 6 show an exemplary embodiment of the inventive device as a side view in the conveying direction (Figure 5) and as a plan view of the support surface 2 (Figure 6). The device is equipped for cross-strapping, wherein the longitudinal strapping is performed, as described in connection with FIG. For the Querumreifung a stationary loop channel 30 is provided in a conventional manner, which bends in a plane transverse to the conveying direction F (Querumreifungsebene Q) to the Umreifungsposition. The object to be strapped is, for example, a stack of newspapers, magazines or other flat objects. The strapping material 6 is withdrawn for the longitudinal and for Querumreifung of a supply roll 31 each. With a correspondingly twisted and curved feed (not shown) of the one of the two feeders, it is possible to arrange the two supply rollers 31 in the manner shown coaxially and thus save space.

The apparatus further comprises pressing means 40 for pressing the object 1 to be strapped before and during the strapping and drive means 41 for the pressing means. These pressing means 40 are equipped in addition to the pressing function for other functions and will be described in more detail in connection with Figure 7.

The apparatus shown in FIGS. 5 and 6 is equipped for transverse strapping following the longitudinal strapping, wherein the two strapping processes can also overlap at least to a limited extent in terms of time. For this reason, the loop channel 30 extends for the Querumreifung outside the path of the longitudinal loop and spans uninterrupted on the Umreifungsposition. The loop guide (slide rails 10.1 and 10.2) terminate below the loop channel 30 for Querumreifung rising outside the groove-shaped loop channel 4 for the Längsumreifung from the support surface. In order to achieve the loop lengths necessary for the two strappings, the groove-shaped loop channel 4, as shown in FIG. 6, can have not only convex but also concave bends. If only one Längsumreifung is provided, can be dispensed with the concave bend (channel 4 ', shown in dotted lines).

FIG. 7 shows as a side view like FIG. 5 but in more detail the strapping position and in particular the pressing means 40 of the device according to FIGS. 5 and 6. As can also be seen from FIG. 6, these pressing means 40 consist of four relative to the strapping planes (longitudinal strapping plane L, FIG. Querumreifungsebene Q) arranged in mirror image, pressing elements 42. For a strapping position, which is equipped for only one strapping, a corresponding pair of pressing elements is advantageously provided.

The pressing elements 42 can be lowered by means of a common drive 41 onto the object 1 to be strapped. The drive 41 is realized, for example, as a chain hoist 43 arranged below the bearing surface 2 with traverses 44 coupled thereto and with a respective vertical carrier 45 arranged laterally of the strapping position for each pressing element 42. The pressing members 42 may be formed as simple relative to the vertical supports 45 stationarily arranged pressing plates. Advantageously, however, they are, as shown in Figure 7, configured as angled toggle 46, which are arranged tiltable about an axis 47 in the region of the upper ends of the vertical support 45 and each one extending over the Umreifungsposition, pressing part 46.1 and a have laterally extending part 46.2. The knee lever part 46.2 is distanced for example by means of spring 48 from the vertical support 45, such that the toggle lever part 46.1 is directed at uncompressed spring 48 from the axis of rotation 47 from below.

When the object 1 to be strapped is conveyed to the strapping position, the traverses 44 and thus also the vertical straps 45 and the toggle levers 46 are in an uppermost position, which is shown in phantom for the knee levers in FIG. As soon as the object to be strapped is positioned in the strapping position, the pressing elements 42 are moved downwards. The ends of the pressing toggle parts 46.1 meet first on the object to be strapped and these toggle parts are pressed on further lowering under compression of the springs 48 in a horizontal position. When a sufficient pressing force is achieved, the actual strapping can begin.

The pressing elements 42 can simultaneously also assume a guiding function for a loop released from the loop guide 10. For this purpose, freely rotatable rollers 50 are arranged at the two ends of the toggle parts 46.1 and 46.2 and optionally also between them, of which a guide band 51, whose both ends are fixed to stationary parts of the device is held in a predetermined position. Each of the four pressing elements 42 is associated with at least one such guide band 51. The guide bands 51 extend on one side of the Längsumreifungsebene L from the loop channel 30 for Querumreifung on the other side of the Längsumreifungsebene L from the end of the loop guide 10 to the end of the pressing toggle 46.1, from there to the end of the side toggle 46.2 and from there against the supporting surface. The guide bands 51 are optionally held slightly stretched with suitable means, not shown.

As can be seen from FIG. 7, the uppermost parts of the guide belts 51 form a guide channel 55 which is parallel to the longitudinal strapping plane L and open above the loop guide 10, in which the loop of the longitudinal strapping material moves from the end of the loop guide 10 onto the object 1 to be strapped.

FIGS. 5 to 7 further show a means by means of which a cover sheet 60 to be applied prior to strapping onto the object 1 to be strapped can be positioned for the application. These are four, in turn, mirror images of the two strapping planes L and Q arranged above the strapping position, substantially stationary blade carriers 61 (for easy strapping two blade carriers). The height of the blade carrier 61 over the support surface 2 is such that even the highest object to be strapped can be conveyed in the unpressed state below into the strapping position.

The cover sheets 60 are synchronized with successive strapping in a manner not shown rectified, for example, with the conveying direction F and positioned from above on the sheet carriers 61 and are then bent by the leading ends of the pressing toggle 46.1 down and thus pulled by the Blattträgem 61 and positioned on the object to be strapped 1 and pressed against this.

FIGS. 8 and 9 show a further, exemplary embodiment of the device according to the invention. This device differs from the devices of the preceding figures in that the conveying direction F parallel to the support surface 2 of the strapping position is only the direction of the conveyance of the strapped object 1 out of the strapping position and the object 1 to be strapped from above, that is, substantially perpendicular to the bearing surface 2 and the conveying direction F (feeding direction F ') is brought into the strapping position. To make this possible, it is merely necessary to ensure that the two slide rails 10.1 and 10.2 or a differently configured loop guide means does not extend or arch over the strapping position, but only leaves them against the access to the strapping position from above. This is clearly evident from FIG.

The object 1 strapped in the device according to FIGS. 8 and 9 is, for example, a stack or cross stack of flat objects, which is formed, for example, in the strapping position by feeding stack sections 1.1 from above (feed direction F ') in the strapping position. For this example, this is provided with corner guides 70 which are at least the output side for ejecting the strapped stack displaced or retracted. As shown in FIG. 8, the stacking sections may be formed directly above the strapping position by stacking supplied shingled stream sections.

Even in the case of a supply from above, the strapping with the aid of the loop guide can be a longitudinal or Querumreifung (relative to the Wegförderrichtung F). An additional, at least partially simultaneous strapping (cross strapping) is not possible with at least one further loop channel, as it is proposed in Figures 5 and 6 for the additional Querumreifung (no accessibility from above). However, a cross strapping can be achieved by means of a further strapping position 71 (transverse strapping) following in the conveying direction F to the strapping position according to the invention (longitudinal strapping). The further strapping position is equipped with, for example, a further loop channel 30 extending transversely to the conveying direction F and extending in a substantially vertical plane.

Pressing elements and elements for feeding cover sheets, as shown in FIGS. 6 and 7, for the embodiment of the device according to the invention, as shown in FIGS. 8 and 9, likewise have to be equipped in such a way (eg laterally displaceable) that they are the same Supply of the object to be strapped from above does not stand in the way.

Claims (17)

1. Strapping installation suitable for strapping objects (1), in particular stacks of printed products such as newspapers or periodicals, using a strap (6), the installation comprising a strapping position with a bearing surface (2), means for positioning the objects to be strapped in the strapping position, and means for removing the strapped objects from the strapping position in a conveying direction (F) oriented essentially parallel to the bearing surface (2), the installation further comprising a fastening region (3) located in the strapping position and equipped for supplying the strap (6) into a loop channel (4), for securing a loop end (7), for retracting the strap (6) from the loop channel (4), and for fastening and severing a completed strapping, wherein the loop channel (4) extends from either side of the fastening region (3) in the shape of a groove in the bearing surface (2), characterized in that the installation further comprises a loop guide (10) being stationary during the strapping procedure, which loop guide rises from the bearing surface (2) inside of the loop channel (4) and on one side of the strapping position and arches across or towards the strapping position in such a manner that it does not obstruct positioning of the objects to be strapped (1) in the strapping position and such that a strap loop (6.2) slides on an outer surface of the loop guide (10), and the strap loop (6.2) being supported and guided by beginning and end of the loop channel (4) and by the loop guide (10) is the shorter the higher it rises on the loop guide (10).
2. Strapping installation according to claim 1, characterized in that the means for positioning the object (1) to be strapped in the strapping position is equipped for supply from above towards the strapping position or essentially in the conveying direction (F), and that the loop guide (10) arches towards the strapping position.
3. Strapping installation according to claim 1, characterized in that the means for positioning the object (1) to be strapped in the strapping position is equipped for supply essentially in the conveying direction (F) and that the loop guide (10) arches across the strapping position.
4. Strapping installation according to one of claims 1 to 3, characterized in that, for longitudinal strapping, a beginning and an end of the groove-shaped loop channel (4) is aligned parallel to the conveying direction (F), and that the installation is further equipped for transverse strapping in the strapping position or in an additional strapping position following the strapping position in the conveying direction (F).
5. Strapping installation according to claim 4, characterized in that it comprises a further loop channel (30) extending at a right angle to the conveying direction (F).
6. Strapping installation according to one of claims 1 to 5, characterized in that the loop guide (10) comprises two or more slide rails (10.1, 10.2).
7. Strapping installation according to claim 6, characterized in that the groove-shaped loop channel (4) comprises a concave bend between the guide rails (10.1 and 10.2) and that, in the area of the concave bend of the groove-shaped loop channel (4), an element rising from the bearing surface (2) is arranged on the outside of the loop channel (4).
8. Strapping installation according to claims 5 and 7, characterized in that the element rising from the bearing surface (2) outside of the groove-shaped loop channel is the further loop channel (30), which extends across the strapping position above the loop guide (10).
9. Strapping installation according to one of claims 1 to 8, characterized in that, at least in the area where the loop guide (10) rises from the bearing surface, the groove-shaped loop channel (4) comprises an inner wall (4.2) slanting towards the bearing surface (2).
10. Strapping installation according to one of claims 1 to 9, characterized in that at least part of the groove-shaped loop channel (4) is closeable.
11. Strapping installation according to one of claims 1 to 10 characterized in that the fastening region (3) is equipped to hold a tape-shaped strap (6) with its width parallel to the bearing surface (2) and that the loop channel (4) comprises twists such that, in bent channel areas, the tape-shaped strap (6) is positioned with its width vertical to the bearing surface (2).
12. Strapping installation according to one of claims 1 to 10, characterized in that the fastening region (3) comprises a rotating strap holding means (13, 14), by which the tape-shaped strap (6) is rotateable from a position, in which its width is vertical to the bearing surface (2), to a position, in which its width is parallel with the bearing surface (2).
13. Strapping installation according to one of claims 1 to 10, characterized in that the fastening region (3) is equipped for unchangeably holding a tape-shaped strap (6) with its width vertical to the bearing surface (2) and for fastening the strap in this position.
14. Strapping installation according to one of claims 1 to 13, characterized in that it further comprises two or four pressing elements which are capable to be lowered (42).
15. Strapping installation according to claim 14, characterized in that the pressing elements (42) are designed as knee levers (46) being rotateable around an axis (47).
16. Strapping installation according to one of claims 14 or 15, characterized in that the pressing elements (42) comprise guide tapes (51) for guiding the strap loop (6), which guide tapes form a guide channel (55) above the strapping position, which guide channel (55) extends from the end of the loop guide (10) towards the strapping position and is open above the end of the loop guide (10).
17. Strapping installation according to one of claims 14 to 16, characterized in that it further comprises means for positioning a cover sheet (60) on the object (1) to be strapped and that the pressing elements (42) are equipped for displacing the cover sheet (60) while being lowered on to the object (1) to be strapped.

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