EP3083414B1 - Mobile strapping device - Google Patents

Description

The invention relates to a mobile strapping device, as indicated in claim 1.

From the EP 2 271 553 B1 is a mobile strapping device for strapping of packaged with a strapping known. This strapping device comprises a tensioning wheel for applying a belt tension to a loop of a strapping belt wound around the packaged goods, and a friction welding device for producing a welded connection at an overlapping region of the loop of the strapping belt in which a beginning of the belt and a belt end are placed one above the other. Furthermore, the mobile strapping device comprises a rechargeable energy store for storing energy, in particular electrical energy. The tensioning wheel is associated with a counter-holding element, wherein the superimposed strip beginning and end of the tape between the counter-holder plate and tensioning wheel can be clamped. For this purpose, the counter-holder plate is pivotally mounted, wherein the pivot axis of the counter-holder plate is arranged parallel to the axis of rotation of the tensioning wheel. In order to brace the Bananfang and the band end of the strapping against each other, these are superimposed and introduced laterally into the mobile strapping device. Subsequently, the counter-holder element is pivoted in the direction of tensioning wheel by means of an actuating device, whereby the distance between the counter-holding element and tensioning wheel is reduced and thereby the strapping is clamped. Subsequently, the tensioning wheel can perform a rotational movement, whereby the strapping band is stretched. After completion of this clamping operation, a friction welding is activated by a friction element is pressed against a counter-holding element, which press the beginning of the tape and the tape end together and then welded together by an oscillating movement of the friction element. After completion of the welding process, the counter-holding element of the tensioning wheel is swung out again, and the friction welding device is opened, so that the tensioned and welded strapping can be carried out laterally from the mobile strapping device.

The disadvantage of the EP 2 271 553 B1 known design is that the strapping can not be very beneficial introduced into the strapping, whereby time losses arise.

The present invention has for its object to provide an improved mobile strapping device.

This object of the invention is achieved by the measures according to claim 1.

According to the invention, a mobile strapping device is provided for strapping packaged goods with a strapping band, in particular a plastic band. This mobile strapping device comprises a base frame, a tensioning device with at least one tensioning wheel for applying a clamping force acting in the tangential direction to a lateral surface of the at least one tensioning wheel on a loop of the strapping band wound around a packaged goods, a drive unit which is provided at least for driving the at least one tensioning wheel a stopper member cooperating with the at least one tensioning wheel received in a counterholder plate, a connecting device for connecting the two overlapping portions of the strap of the strapping band, a cutter for cutting the strapping band, and a power source for providing drive energy, the counterpart plate relative to Base frame is movably mounted on this and is adjustable by means of an adjusting device between a threading position and a closed position. Furthermore, a surface of the counter-holder plate associated with the tensioning wheel is arranged in its closed position essentially parallel to a rotation axis of the at least one tensioning wheel, wherein the counter-holder plate is mounted on the base frame by means of a rotary joint. A rotational axis of the rotary joint is arranged substantially parallel to the tangential direction of the tensioning wheel, so that the counterpart support plate is pivotally mounted to the base frame and in the threading position forms a wedge-shaped insertion region relative to the tensioning wheel.

An advantage of the embodiment of the invention is that the threading of the tension band is substantially facilitated by the wedge-shaped insertion region. This can be compared to known solutions ergonomics, as well as the working speed and thus the efficiency in dealing with such a mobile strapping device can be increased enormously. In particular, an embodiment in which the wedge-shaped opening is aligned in the direction of the front side of the strapping device has the considerable advantage that the strapping band can be inserted without precise positioning. Thus, the mobile strapping device can be operated intuitively, which also increases the working safety in dealing with such a strapping device.

Furthermore, it may be appropriate that the counter-holder plate is inclined in the threading position in an opening angle between 3 ° and 30 °, in particular between 4 ° and 20 °, preferably between 5 ° and 15 ° to the closed position. Of advantage is an opening angle in this angular range, since it can be achieved in said angular range that the opening angle is on the one hand chosen large enough to allow easier insertion of the strapping. On the other hand, the opening angle is not too large to avoid a too large travel of the backing plate, as this would bring an increased processing time in the operation of the mobile strapping device.

Furthermore, it can be provided that the counter-holder plate can be moved into a maintenance position, in which it can be swung out at least approximately 45 ° to the closed position. It is advantageous in this case that the opening angle in which the method is moved during operation can be selected to be smaller, and thus the fastest possible processing time during operation of the mobile strapping device is ensured. For maintenance purposes, this position can then be approached in order to easily exchange wear parts. It can be provided that the maintenance position is achieved either by using the drive unit, or that the counter-holder plate can be moved manually in the maintenance position.

In addition, it may be appropriate that the connecting device comprises a Reibschweißvorrichtung comprising a first friction element and a second friction element, between which friction elements, the strap is clamped, wherein the first friction element in a direction parallel to the axis of rotation of the tensioning wheel friction direction relative to the second friction in an oscillating movement is displaced. The advantage here is that with a Reibschweißvorrichtung especially a plastic band can be welded easily and energy efficient.

According to an expedient development can be provided that the second friction element is received in the counter-holder plate, or that the counter-holder plate is formed as a second friction element. It is advantageous in this case that the second friction element can be swung in motion-coupled with the counter-holding element, which cooperates with the tensioning wheel. Thus, the ergonomics in the labor input of such a strapping device over known solutions is further increased, since the wedge-shaped insertion region can extend over the clamping device and also over the friction welding device. Thus, there is no "bottleneck" on the mobile strapping device, which must be taken to ensure that the strapping is inserted with exact position.

Furthermore, it can be provided that the counter-holder element arranged in the counter-holder plate is adapted, at least in sections, to the shape of the lateral surface of the tensioning wheel on its side facing the tensioning wheel, and is provided with a contoured surface. The advantage here is that on the one hand by these measures the force applied by friction and partial positive engagement holding force, which is applied by the counter-holder element on the strip beginning can be increased. On the other hand, it can also be increased by the tensioning wheel by friction and partial positive engagement on the tape end force applied.

Furthermore, it may be expedient that a tape backstop is formed, by means of which the tensioning force applied to the strapping band by the tensioning device can be fixed when the tensioning force applied by the tensioning device is reduced or eliminated, wherein the backstop comprises a blocking element which is connected to a second counterstay element cooperates, wherein the second counter-holder element is received in the counter-holder plate. It is advantageous here that can be achieved by such a belt return lock that the strap can be welded stress-free, whereby the quality of the weld can be improved. The fact that the second counter-holder element is accommodated in the counter-holder plate, the ergonomics of such a strapping device over known solutions can be further increased, since the wedge-shaped insertion region can extend over the tensioning device and also over the tape backstop. Thus, there is no "bottleneck" on the mobile strapping device Care must be taken to ensure that the strap is inserted accurately.

Furthermore, it may be expedient that a cutting device is formed, through which the strapping band can be separated. The advantage here is that excess parts of the strap can thus be easily separated.

In an advantageous development it can be provided that the cutting device is arranged directly adjacent to the first friction element of the friction welding device, wherein in the active state of the friction welding device, the first friction element is relatively movable to the fixed relative to the base frame cutting device. The advantage here is that this does not require a separate drive for the cutting device, since the first friction element moves the strapping band, in particular the band end of the strapping band, whereby the cutting process can be implemented.

Furthermore, it may be expedient that working surfaces of the second friction element of the friction welding device, the second counter-holder element of the belt return stop and the first counter-holding element of the tensioning device are arranged substantially in one plane, so that the strapping almost straight, and parallel to the surface of the packaged, feasible by these devices is. The advantage here is that the strapping on the one hand does not need to be unnecessarily kinked, whereby it is spared and thus preserves the strength of the strapping. Furthermore, it can be achieved that two overlapping tabs of the strapping in the region of Reibschweißvorrichtung sat tightly together, which on the one hand, the weld can have a higher strength and further the strapping can be shortened by the cutting so that no or only the lowest possible splice of the strap is caused by the cutter.

Furthermore, it can be provided that a common, one-piece counter-holder plate is provided for the friction-welding device and the clamping device. The advantage here is that on the one hand the strap is very easily inserted by this training. Furthermore, only one common drive is needed to put the elements in an angular position, in which the strapping is easy to insert. In addition, only a rotary joint is needed, via which the counter-holder plate is mounted on the base frame.

In a development, it can be provided that a common, one-piece counter-holder plate is provided for the friction-welding device and the clamping device. The advantage here is that on the one hand the strap is very easily inserted by this training. Furthermore, only one common drive is needed to place the elements in an angular position in which the strapping is easy to insert. In addition, only a rotary joint is needed, via which the counter-holder plate is mounted on the base frame.

Furthermore, it can be provided that the first counter-holder element and / or the second counter-holder element and / or the second friction element are pivotally received in the counter-holder plate, wherein the pivot axis in each case runs parallel to the axis of rotation of the rotary joint. The advantage here is that an angular offset can be compensated by the pivotal receiving the individual elements, which results from an angular position of the counter-holder plate relative to its closed position. This angular position can be caused by the use of strapping with different tape thicknesses or thicknesses.

Furthermore, it can be provided that the anvil element has a tensioning wheel facing upper part and a counter-holder plate facing lower part, wherein the upper part is coupled by means of an inclined plane with the lower part, wherein a distance between the tensioning wheel and upper part is adjustable in that the upper part relative to Lower part in the tangential direction of the tensioning wheel is displaceable. The advantage here is that it can be achieved by the clamping force of the tensioning wheel, the contact pressure of the strap can be increased to the tensioning wheel and the counter-holding element. Thus, the necessary clamping force can be increased.

According to a development it can be provided that the inclined plane is formed by a sawtooth-like profile. The advantage here is that thereby a steeper edge of the inclined plane can be achieved without increasing the space required for the inclined plane excessively.

Moreover, it is possible for the friction welding device to have a force increasing device, by means of which the first friction element can be pressed against the second friction element, the force increasing device having an inclined plane and the distance between the two friction elements being adjustable parallel to the axis of rotation by displacement of the force increasing device. The advantage here is that thereby the necessary contact pressure in the friction welding must not be applied by the pivoting movement of the counter-holder plate. Thus, the drive unit, which is used for the pivoting movement of the counter-holder plate must not be designed to be excessively large in order to apply the necessary force between the two friction elements can.

In addition, it can be provided that the force-increasing device and the first friction element can be driven by the same drive unit. The advantage here is that no additional drive unit is needed to drive the force increasing device. Thus, the total mass of the mobile strapping device can be kept as low as possible.

In the method for operating the mobile strapping device is provided that this comprises the method steps according to claim 18. The advantage here is that thereby the mobile strapping device can be operated energy efficient and time-saving.

In addition, it can be provided that the sequence of the individual method steps can be interrupted by the user, wherein an emergency stop button is provided, which can be actuated by the user to interrupt the method steps. The advantage here is that thereby the reliability of the mobile strapping device can be increased.

For a better understanding of the invention, this will be explained in more detail with reference to the following figures.

Fig. 1

eine perspektivische Ansicht einer mobilen Umreifungsvorrichtung;

Fig. 2

eine Vorderansicht einer mobilen Umreifungsvorrichtung;

Fig. 3

eine Seitenansicht von links einer mobilen Umreifungsvorrichtung;

Fig. 4

eine Seitenansicht von rechts einer mobilen Umreifungsvorrichtung;

Fig. 5

eine schematische Darstellung einer weiteren Ausführungsvariante einer mobilen Umreifungsvorrichtung mit zweitem Spannrad;

Fig. 6

eine schematische Darstellung einer weiteren Ausführungsvariante einer mobilen Umreifungsvorrichtung mit Spannhebel;

Fig. 7

eine perspektivische Ansicht einer Ausführungsvariante eines ersten Gegenhalterelementes mit Spannrad;

Fig. 8

eine Schnittansicht der mobilen Umreifungsvorrichtung gemäß der Schnittlinie VIII-VIII aus Fig. 2.

In each case, in a highly simplified, schematic representation:

Fig. 1

a perspective view of a mobile strapping device;

Fig. 2

a front view of a mobile strapping device;

Fig. 3

a side view from the left of a mobile strapping device;

Fig. 4

a side view from the right of a mobile strapping device;

Fig. 5

a schematic representation of another embodiment of a mobile strapping device with second tensioning wheel;

Fig. 6

a schematic representation of another embodiment of a mobile strapping device with clamping lever;

Fig. 7

a perspective view of an embodiment of a first counter-holding element with tensioning wheel;

Fig. 8

a sectional view of the mobile strapping device according to the section line VIII-VIII Fig. 2 ,

By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and these position information in a change in position mutatis mutandis to transfer to the new location.

The FIGS. 1 to 4 show various views of an embodiment of a mobile strapping device 1 for strapping of packaged goods 2 by means of a strapping 3.

Fig. 1 shows a perspective view of the mobile strapping device 1. The strapping 3 used in connection with the mobile strapping device 1 are preferably made of plastic, in particular polyethylene terephthalate (PET) or polypropylene (PP) and have approximately a width of 8 to 25 mm. The strip thickness of the strapping bands used can vary from about 0.4 to 1.5 mm.

For strapping the packaged goods 2 by means of the strapping band 3, this is placed in a loop 4 around the packaged goods 2. In this case, the strapping band 3 is wrapped around the packaged product 2 in such a way that the band beginning 5 and the band end 6 lie over one another and thus an overlapping portion 7 is formed. The beginning of the tape 5 is below the end of the tape 6 and thus the package 2 next to it.

The overlapping section 7 is selected to be approximately as large or positioned so that it preferably extends over the entire length 8 of the mobile strapping device 1. If now an overlapping section 7 is formed, which has a sufficient length and extends approximately parallel to the surface 9 of the packaged goods 2, the strapping band 3, in particular the overlapping section 7 of the strapping band 3, can be introduced into the mobile strapping device 1 and stretched there or attached. The strapping band 3 can be cut to length here in a predefined length. Alternatively, it is also possible that the strapping 3 is withdrawn as an endless belt 10 from a roll.

The mobile strapping device 1 comprises a base frame 11 on which the individual parts of the strapping device 1 are constructed. The base frame 11 may in this case consist of a one-piece casting. However, it is also possible that the base frame 11 comprises a plurality of different individual parts of which it is constructed, wherein the individual parts are connected to each other by fastening means or by a material connection.

As a material for producing the base frame 11, a material is preferably used, which has the lowest possible weight with sufficient strength. In a preferred embodiment, this may be, for example, aluminum casting or else various plastics. Furthermore, it is also possible that for the base frame 11 different materials are combined to run about locally loaded components particularly stiff and stable.

On the base frame 11, a clamping device 12 is mounted, which serves for clamping the looped around the packaged goods 2 strapping 3. Preferably, the tensioning device 12 has a tensioning wheel 13, which serves for tensioning the strapping band 3. For tensioning the strapping band 3, provision may be made for the tensioning wheel 13, which is mounted so as to be rotatable about its axis of rotation 14, to be received on the base frame 11.

When tensioning wheel 13 can be provided that it has a diameter approximately between 50mm and 150mm. The width of the tensioning wheel 13 is approximately between 10mm and 40mm and is dependent on the bandwidth of the strapping band 3 to be processed.

Furthermore, it can be provided that the tensioning wheel 13 has a contoured lateral surface 15, through which a clamping force 16 can be applied to the band end 6, which acts in the tangential direction 17 on the lateral surface 15 of the tensioning wheel 13.

For such a force application can be provided that the contoured lateral surface 15 of the tensioning wheel 13 is formed approximately by a knurling 18, which are formed by the knurling 18 on the lateral surface 15 innumerable small tips. This knurling 18 is adapted to penetrate at a pressing of the tensioning wheel 13 to the outer surface 19 of the Umreifungsbande 3, in particular of the tape end 6, in the surface 19 or at least slightly deform, creating a combination of positive engagement and frictional engagement between the belt 3 and tensioning wheel 13 can be generated. As a result, a clamping force 16 can be applied to the strapping band 3 by the tensioning wheel 13. This clamping force 16 is related to the contact pressure with which the tensioning wheel 13 is pressed against the strapping band 3.

In order to press the strapping 3 to the tensioning wheel 13, a first counter-holding element 20 may be provided, which is arranged circumferentially of the tensioning wheel 13 and thus can press the strapping 3 to the tensioning wheel 13, in particular to the lateral surface 15 of the tensioning wheel 13. A possible embodiment variant as the first counter-holder element 20 is pressed against the tensioning wheel 13, or can be removed again from this, will be described in more detail below.

Preferably, the overlapping portion 7 of the strap 3 between the tensioning wheel 13 and the first counter-holding element 20 is inserted. Here are the beginning of the tape 5 and the tape end 6 above the other, wherein the beginning of the tape 5 is closer to the first counter-holding element 20, and the tape end 6 is closer to the tensioning wheel 13. The first counter-holder element 20, in particular the surface 21 of the first counter-holding element 20 facing the strapping band, can be designed to be similar or similar to the lateral surface 15 of the tensioning wheel 13, that is to say have knurling. As a result, a force can also be applied to the strapping band 3, in particular to the band beginning 5, by means of the first counterholder element 20.

Thus, in the described arrangement of a clamping device 12 by means of the tensioning wheel 13, a force can be applied to the strapping 3. By means of a cooperating with the tensioning wheel 13 first counter-holding element 20, a force can be exerted on the strip beginning 5.

If the strapping band 3 is to be tensioned, then it is provided that the tensioning wheel 13 is set into a rotational movement, whereby the band end 6 is moved together with the tensioning wheel 13. The voltage applied directly to the end of the tape 6 beginning of tape 5 is in this case held by the first counter-holding element 20 in position, so that it comes to a relative movement or to one another sliding between the end of the tape 6 and 5 tape.

The tensioning wheel 13 is preferably rotatably mounted by means of a flying bearing on the base frame 11, that is, that only one side of the tensioning wheel 13, a bearing point is provided, on which the tensioning wheel 13 is connected to the base frame 11. To drive the tensioning wheel 13, a drive unit 26 is provided, which is preferably formed by a rotary drive, for example a DC motor. This rotary drive can be connected via a gear with the tensioning wheel 13, so that an increased force can be applied to the strapping 3.

In order to subsequently facilitate the description of the mobile strapping apparatus 1, a coordinate system relating to the mobile strapping apparatus 1 is introduced. As x-axis 23 in this case that axis is referred to, which is aligned in the longitudinal direction 22 of the strapping 3 and also the mobile strapping device 1. As y-axis 24, the transverse extent of the mobile strapping device 1 is referred to, which extends parallel to the axis of rotation 14 of the tensioning wheel 13. The z-axis 25 is the high extension of the mobile strapping device 1, which is arranged normally on the x-axis 23 and on the y-axis 24.

The direction of the clamping force 16 results from the arrangement position of the first counter-holding element 20 relative to the tensioning wheel 13. This specifies a contact point 27 at which the tensioning wheel 13 and the strapping band 3, in particular the band end 6, are pressed against one another. Preferably, in this case, the first counter-holding element 20 is arranged so that the tangential direction 17 runs parallel to a longitudinal orientation 22 of the strapping band 3.

Furthermore, it can be provided that the mobile strapping device 1 comprises a belt return lock 28, whereby a loosening of the strapping against a clamping direction 29 is avoided, even if the clamping force 16 is reduced on the tensioning wheel 13. Such a belt return lock 28 comprises a blocking element 30 which cooperates with a second counter-holding element 31. In this case, the blocking element 30 and the second counterholder element 31 are arranged opposite one another such that the band end 6 of the strapping band 3 or the band end 6 and the band beginning 5 of the strapping band 3 can be clamped between these two elements 30, 31.

How better in Fig. 2 As can be seen, in this case the surface 32 of the second counter-holding element 31 or the surface 33 of the blocking element 30 are arranged parallel to one another in order to achieve a good load distribution onto the strapping belt 3 during the clamping process.

The clamping process is as follows. While the band end 6 of the strapping 3 is pulled by the tensioning wheel 13 in the tensioning direction 29, the blocking element 30 is entrained by the band end 6 and pressed against a spring element 34. The spring element 34 may in this case be designed, for example, as a helical spring or as a leaf spring. In order to move the blocking element 30, this is mounted on the base frame 11 with a translatory guide 35.

The translatory guide 35 is in this case arranged so that the contoured surface 33 of the blocking element 30 of the tape backstop 28 is aligned parallel to the surface 32 of the locking element 30 opposite the second Gegenhalterelementes 31, wherein the locking element 30 by means of a translational guide 35 relative to the base frame 11 is mounted on this, and the translational guide 35 is aligned for the first blocking element 30 at an angle 37 to the surface 32 of the second counter-holder element 31, so that by a parallel to the surface 33 displacement of the blocking element 30, a distance 38 between the surface 33 of the blocking element 30th and the surface 32 of the second counter-holder element 31 is adjustable.

Due to this angular arrangement of the translatory guide 35, the movement of the blocking element 30 in the direction of movement 36 can be used to increase a distance 38 between the blocking element 30 and the second opposing element 31, in particular between the surfaces 32, 33 of the respective elements 31, 30. to downsize. On the one hand, care should be taken here that the angle 37 is not too small, since otherwise an excessively large return path is necessary before the strapping band 3 is clamped. If the angle 37 is too large, then sufficient clamping force can not be applied to the strapping band 3.

If now the locking element 30 is pressed by the clamping force 16 of the tensioning wheel 13 on the belt end 6 in the direction of tensioning direction 29, the distance 38 between locking element 30 and second counter-holding element 31 is increased, whereby the friction acting on the blocking element 30 is reduced. By the spring element 34, the blocking element 30 is now held in a position in which the sliding friction between locking element 30 and the strapping 3 and the spring force of the spring element 34 are equal.

After completion of the clamping operation, the tensioning wheel 13 can be rotated counter to its clamping direction, whereby the force is reduced by the tensioning wheel 13 on the strapping 3. Here, the strapping 3, in particular the band end 6 is moved counter to its clamping direction 29, which due to the frictional force between the locking element 30 and the band end 6 and the blocking element 30 is moved in the opposite direction.

By the angle 37, which has the translational guide 35 of the blocking element 30 relative to the x-axis 23, this movement of the blocking element 30 is converted against the clamping direction 29 in a compressive force, whereby the band end 6 is clamped. In this case, it is possible that the surface 33 of the blocking element 30 penetrates into the strapping band 3, as a result of which the frictional connection or the mixture of positive and frictional engagement is increased.

If the blocking element 30 has been moved a certain distance counter to the tensioning direction 29, then an equilibrium of forces arises, whereby a further return of the blocking element 30 relative to the base frame 11 is prevented. The blocking element 30 is located now in a blocking position 39 in which the band end 6 is clamped, and thus a stable equilibrium state occurs.

It can be provided that not only the surface 33 of the blocking element 30 but also the surface 32 of the second counter-holding element 31 with a knurling, as has already been described in the tensioning wheel 13 is executed. As a result, both the beginning of the tape 5 and the end of the tape 6 can be fixed by means of the tape backstop 28 in their position. However, it is not necessary for the overlapping section 7 to extend to the band return lock 28, but it is also conceivable that only the band end 6 is clamped in the region of the band return lock 28 and the band beginning 5 is already clamped by the first counterholder element 20 and thus in his position is fixed.

As in Fig. 3 clearly visible, it can be provided that the translational guide 35 of the blocking element 30 is realized by the use of guide elements 40 which are arranged on the blocking element 30. These guide elements 40 can form, for example, a simple sliding guide. The guide elements 40 may be formed, for example, as a dovetail guide.

Furthermore, it can be provided that the guide elements 40 of the translatory guide 35 of the blocking element 30 are arranged at an angle to each other. The advantage here is that the distribution of forces, or the power transmission in the locking element 30 can be made cheap.

In a preferred embodiment, it is also conceivable that the translational guide 35 is designed as a ball-bearing guide, since the smooth running of the blocking element 30 can be increased by such a ball bearing. To accommodate such a ball bearing in the blocking element 30, it can be provided that the lateral guide elements 40 have a longitudinal groove in which the balls of the ball bearing can be performed.

Even with a ball-bearing guide, it makes sense if the lateral guide elements 40 are set at an angle to each other, since thus the load of the individual balls can be minimized. This effect can be seen analogous to a ball bearing by also by employment of the shoulder surfaces, for example, in an angular contact ball bearings, the axially transmissible force can be increased with the same size.

The guide elements 40 are in this case aligned so that the blocking element 30 has a trapezoidal shape in cross section, wherein the longer base of the trapezoid of the surface 33 of the blocking element 30 is arranged facing. Preferably, the guide elements 40 are arranged inclined at an angle 41 of about 0 to 45 ° to the vertical.

In a preferred embodiment, the blocking element 30 is approximately the same width as the tensioning wheel 13. The blocking element 30 can be made in one piece. However, it is also conceivable that the blocking element 30 comprises a base body 42, in which the translational guide 35 is integrated and further comprises a wear element 43 which has the contoured surface 33 of the blocking element 30.

The wear element 43 can in this case be fastened to the base body 42 by means of a fastening means. It is advantageous in such an embodiment that in the case of wear not the complete locking element 30 must be replaced, but that only the wear element 43 can be changed. Here, the current maintenance costs can be kept low and further it can be provided that the wear element 43 is easy to change without causing parts of the translational guide 35 must be disassembled.

Further embodiments of the blocking element 30 are in Fig. 5 and Fig. 6 shown and described in more detail later.

In the Fig. 1 and 2 Furthermore, a connecting device 44 is shown, which is intended to connect the tape top 5 and the tape end 6 together. This connecting device 44 can in principle be based on different mechanisms of action. For example, the overlapping sections 7 can be connected by positive interlocking.

Furthermore, when using plastic tapes is also conceivable that by introducing heat at the beginning of the tape 5 and 6 tape end are melted and thus connected to each other. In a further embodiment, it is also conceivable for the connecting device 44 to generate heat by introducing ultrasound, as a result of which band beginning 5 and band end 6 can be connected to one another.

In a preferred embodiment, the connecting device 44 is designed as a friction welding device 45, in which band start 5 and band end 6 are melted by rubbing together on the contacting surfaces and thus connected to each other. Here, a first friction element 46 may be provided, which is movably mounted on the base frame 11 and as a counterpart, a second friction element 47, which is not moved during the friction welding. The first friction element 46 preferably has a translatory guide 48, by which it is movable in a direction parallel to the axis of rotation of the tensioning wheel 13 extending friction 49. Since the friction direction 49 extends parallel to the axis of rotation 14 of the tensioning wheel 13, this is thus in the direction of the y-axis 24.

The oscillating movement of the first friction element 46 is preferably generated by a drive unit, for example a rotary drive, which causes the movement by means of a crank mechanism with eccentric mounting.

The translatory guide 48 is positioned and aligned such that during an oscillating movement of the first friction element 46 in the friction direction 49, the distance between the first friction element 46 and the second friction element 47 remains the same size. In principle, the structure of the translatory guide 48 can be made the same as the translational guide 35 of the blocking element 30. Therefore, a detailed description of the configuration translational guide 48 is omitted here.

Furthermore, it can be provided that the first friction element 46 is movably mounted in a vertical movement direction 50 and thus the distance between the first friction element 46 and the second friction element 47 can be adjusted. The vertical direction of movement 50 in this case runs in the direction of the z-axis 25.

In a preferred embodiment, it may be provided that the first friction element 46 is pressed by a spring element 51 in the direction of the second friction element 47, whereby a force can be applied to the overlapping portion 7 of the strapping 3 and thus strip top 5 and end 6 are pressed against each other.

Furthermore or alternatively, it can be provided that an actuating element 52 transfers the first friction element 46 from its rest position 53 into a welding position 54. This actuator 52 may for example be coupled to a drive, whereby the first friction member 46 at any time from its rest position 53 in its welding position 54 and back again can be transferred.

Alternatively, it may be provided that the actuating element 52 is formed by an actuating lever 55, wherein the actuating lever 55 is formed as a coupling element between the locking element 30 and the first friction element 46. It can be provided that in the blocking element 30, a driving lug 56 is arranged, which contacts the actuating lever 55. If now the blocking element 30 is transferred to its locking position 39, the actuating lever 55 is set by the driving lug 56 in motion. In this case, the actuating lever 55 presses on the first friction element 46 and thus leads this over from its rest position 53 into its welding position 54.

Since the path of movement of the locking element 30 before it reaches its locking position 39, is very low, the actuating lever 55 must be positioned and adjusted very accurately so that even the slight movement of the locking element 30 is sufficient to the first friction element 46 from its rest position 53 in his To be able to transfer welding position 54.

If now the first friction element 46 is transferred to its welding position 54, then the welding process can be started. Here, the band end 6 is held by friction or positive engagement on the first friction member 46 and thus can be moved by this. The beginning of the strip 5 is held by the second friction element 47 and is thus held at a standstill. Now, if the tape end 6 and the tape start 5 rubbed together under pressure, heat is generated, through which the contacting surfaces of the tape start 5 and the tape end 6 are partially melted and thus can be connected together.

In addition, it can be provided that a cutting device 57 is attached directly adjacent to the first friction element 46. The cutting device 57 may in this case be fastened to the base frame 11 so that the first friction element 46 is movable relative to the cutting device 57.

The cutting device 57 comprises a cutting blade 58, which is held in a guide and has a cutting edge 60. The cutting blade 58 is pressed by a spring element 59 in the direction of the belt end 6. As a result, the force applied to the cutting blade 58 by the spring element 59 is aligned in the direction of the cutting edge 60 of the cutting blade 58.

The cutting edge 60 may be formed as a knife-like edge. In a preferred embodiment, it is also possible that the cutting edge 60 has a serrated edge, resulting in a serrated surface at the cutting edge.

If the band end 6 is moved oscillatingly back and forth by the first friction element 46 in the direction of friction 49, a relative movement between the band end 6 and the cutting blade 58 also takes place. By this relative movement and by the force applied by the spring element 59, the tape end 6 is cut off from the cutting blade 58. Now, if the tape end 6 is cut off, the cutting blade 58 is pressed due to the spring element 59 lying on the lower end of the tape 6 5 tape beginning. In this case, however, there is no cutting operation, since the beginning of the tape 5 is not moved relative to the cutting blade 58.

Furthermore, it can be provided that the cutting blade 58 has an end stop, so that it can be urged by the spring element 59 only up to a certain predefined position.

Furthermore, it can be provided that a counter-holder plate 61 is arranged on the base frame 11, in which at least the first counter-holding element 20 is received. The counter-holder plate 61 may additionally optionally receive the second counter-holder element 31 and / or the second friction element 47.

Here, the first and the second counter-holding element 20, 31 and also the second friction element 47 can be exchangeably received in the counter-holder plate 61. Alternatively, it is also conceivable that the counter-holder plate 61 directly forms these elements. To introduce the tape into the mobile strapping device 1, it may be provided that the counter-holder plate 61 is movable relative to the tensioning device 12, in particular to the tensioning wheel 13. It can be provided that an adjusting device 62 is present, through which the counter-holder plate 61 from a threading position 63 in a closed position 64 can be transferred. It can be provided that the counter-holder plate 61 is moved, for example, in a translational direction. The counter-holder plate 61 is fixed by means of a rotary joint 65 on the base frame 11, wherein a rotation axis 73 of the rotary joint 65 is arranged substantially parallel to the tangential 17 of the tensioning wheel 13, so that the counter-holder plate 61 is pivotally mounted to the base frame 11 and in the threading 63 a wedge-shaped insertion region 75 opposite the tensioning wheel 13 ausformt.

In this way it can be achieved that a pivoting movement is performed, whereby the counter-holder plate 61 from its threading position 63 in a closed position 64 can be transferred. This results in an opening angle 66, which defines the size of the wedge-shaped insertion region 75 between threading position 63 and closed position 64.

The movement of the counter-holder plate 61 in this angular range can in principle be made by the adjusting device 62. It can be provided that the adjusting device 62 by a common drive unit 26, which serves to drive the tensioning device 12, is driven. Alternatively, it may be provided that the adjusting device 62 comprises a further drive unit 67, which is designed specifically for driving the adjustment of the counter-holder plate 61.

In a further embodiment, it may be provided that the counter-holder plate 61 is additionally convertible into a maintenance position 68, in which wear parts can be easily replaced. In this case, it may be provided, for example, that the maintenance position 68 is achieved by manually transferring the counter-holder plate 61.

When transferring the counter-holder plate 61 into the closed position 64, it may be provided that a certain contact pressure between the first counter-holding element 20 and the tensioning wheel 13 is predefined and applied by the drive unit. Furthermore, it is also possible that between the drive unit and the counter-holder plate 61, a spring element is interposed, in order to keep the applied pressure of the counter-holding plate 61 constant.

For facilitated insertion of the strapping 3 in the mobile strapping device 1 can be provided that in the wedge-shaped insertion region 75, a stop element 69 is provided so that the strapping 3 can be properly positioned and is not pushed too far. Alternatively, it can be provided that the counter-holder plate 61 is formed so that it forms a stop, so that the strapping 3 can be properly positioned.

Furthermore, it can be provided that the first counter-holder element 20 and / or the second counter-holder element 31 and / or the second friction element 47 are pivotally received in the counter-holder plate 61, wherein the pivot axis 74 extends parallel to the axis of rotation 73 of the rotary joint 65. This measure is necessary so that different strip thicknesses of the strapping 3 in the mobile strapping device 1 can be stretched. If, for example, a thick strapping band 3 is used, then the counterholder plate 61 can not be pivoted quite as far in the closed position 64 as when a thin strapping band 3 is tensioned in the wedge-shaped insertion region 75.

To compensate for this minimum angular misalignment serves the pivotal receiving the first counter-holding element 20 and / or the second counter-holder element 31 and / or the second friction element 47. In addition, it can be provided that the individual elements 20, 31, 47 described here by means of a return spring in the Retainer plate 61 are held, that in an unloaded state, the individual work surfaces 70 are aligned substantially parallel to each other and parallel to the counter-holder plate 61.

Are all elements as described in the preferred variants and in the Fig. 1 to 4 shown, set in the mobile strapping device, the result is the following characteristic structure. The two counter-holder elements 20, 31 and the second friction element 47 are pivotally received in the counter-holder plate 61. The counter-holder plate 61 is in turn pivotally received on the base frame 11. The working surfaces 70 of the counter-holder elements 20, 31 and the second friction element 47 are arranged substantially in one plane, so that the strapping 3, in particular the overlapping portion 7 of the strapping 3, when it rests against the work surfaces 70, is guided in a straight line which runs parallel to the surface 9 of the packaged goods 2. The friction welding device 45 and the cutting device 57 are arranged in the preferred embodiment between the tape backstop 28 and tensioning device 12. The cutting device 57 is hereby arranged on the side of the friction welding device 45 facing the clamping device 12. The actuating lever 55 establishes a movement coupling between the blocking element 30 and the first friction element 46.

The tensioning device 12, the friction welding device 45 and the belt return lock 28 are arranged as close as possible to each other in order to keep the installation space of the mobile strapping device 1 as low as possible.

The strapping band 3 is looped around the packaged product 2 with a loop 4, the band beginning 5 and the band end 6 being superimposed so that there is an overlapping portion 7 results, in which the tape end 6 is located on the beginning of the tape 5. The beginning of the strip 5 is here the packaged goods 2 faces.

Now, the mobile strapping device 1 is moved in the direction of overlapping portion 7 of the strapping 3. The counter-holder plate 61 is in this case in a threading position 63 whereby the strapping 3 can be easily positioned in the wedge-shaped insertion region 75 between the counter-holder plate 61 and tensioning wheel 13. Now, an adjusting device 62 is activated, by which the counter-holder plate 61 is rotated relative to a rotation axis 73 and is thus transferred from its threading position 63 in its closed position 64.

As a result of this transfer, the overlapping section 7 of the strapping band 3 is clamped between the tensioning wheel 13 and the first counter-holding element 20, the beginning of the strip 5 being held by the first counter-holding element 20 and the band end 6 being held by the tensioning wheel 13 is pressed. At the same time, during the closing operation, the overlapping portion 7 between the first friction member 46 and the second friction member 47 is clamped. As a result, the first friction element 46 is pressed against the spring element 51, resulting in a certain bias between the first friction element 46 and the second friction element 47.

At the same time, during the closing operation, the overlapping section 7 of the strapping band 3 is clamped between the blocking element 30 and the second counter-holding element 31. If now the counter-holder plate 61 in the closed position 64, the clamping device 12 is activated, wherein the tensioning wheel 13 is rotated so that the band end 6 is pulled in the clamping direction 29. In this case, the blocking element 30 is pressed against the spring element 34, whereby the surface 33 of the blocking element 30 slides over the band end 6.

If a predefined belt tension is reached, the direction of rotation of the tensioning wheel 13 can be reversed, as a result of which the belt end 6 is moved counter to the tensioning direction 29. This movement of the strapping 3 against the tension direction 29 results from the bias voltage which has the loop 4 looped around the packaged product 2. If now the band end 6 is pulled against the tensioning direction 29, the surface 33 of the blocking element 30 engages in the band end 6, as a result of which the blocking element 30 is pressed in the direction of its blocking position 39.

Due to the angular position of the translatory guide 35 of the blocking element 30, the band end 6 is now clamped between the blocking element 30 and the second counter-holding element 31. By the transfer of the blocking element 30 in its locking position 39, the actuating lever 55 is activated, whereby the first friction element 46 is transferred from its rest position 53 in its welding position 54 and thus is ready for use.

By these operations, the belt tension, which is applied by the tensioning wheel 13 on the belt end 6, can be reduced. As a result, a higher efficiency in the friction welding process or a higher strength of the weld in the strapping 3 is achieved. Now, the Reibschweißvorrichtung 45 is activated, which welds the strap 3, wherein at the same time the strapping 3 is cut by the cutting device 57. After completion of welding process or after maintaining a certain cooling time the counter-holder plate 61 can be transferred again from its closed position 64 into the threading position 63.

As a result, the ready-welded strapping is released, wherein the mobile strapping device 1 can be pulled out laterally from the engagement region of the strapping. It can be provided that in a first step, the counter-holder plate 61 is opened only so far that the strapping 3 is released and thus the mobile strapping device 1 can be removed and the counter-holder plate 61 is transferred only subsequently in the threading position 63. Thus, it can be achieved that the mobile strapping device 1 can be threaded without damaging the strap 3.

In a further embodiment, it may be provided that the actuating lever 55 is omitted and the first friction element 46 of Reibschweißvorrichtung 45 during the threading of the tape remains in its rest position 53 and actively transferred after clamping of the tape by the tape backstop 28 by means of a drive unit in its welding position 54 becomes.

In an embodiment variant, not shown, it may be provided that between the adjusting device 62 and the counter-holder plate 61, or elsewhere in the drive train of the counter-holder plate 61, a coupling element is provided which serves for Notentkopplung the counter-holder plate 61. Thus, in the event of danger, the counter-holder plate 61 can be brought out of its closed position 64, whereby the strapping 3 is released and thus the clamping force on the strapping 3 falls away. This can increase the safety for a machine operator.

In a further embodiment, not shown, it can be provided that the axis of rotation 14 of the tensioning wheel 13 is slightly inclined, and / or that the tensioning wheel 13 has a slight cone, so that the band end 6 of the strapping 3 is pressed against the threading during the tensioning operation. Thus, it can be achieved that the tape end 6 is not undesirably moved out of the mobile strapping device out.

In the Fig. 5 is a further and possibly independent embodiment of the mobile strapping device 1 is shown, again for like parts, the same reference numerals or component designations as in the preceding FIGS. 1 to 4 be used. In order to avoid unnecessary repetition, the detailed description in the previous ones will be used FIGS. 1 to 4 referred or referred.

Fig. 5 shows the schematic representation of a further embodiment variant in which the blocking element 30 is designed as a further tensioning wheel 71. In this case, an additional clamping force 72 can be applied to the band end 6 of the strapping band 3 by the additional tensioning wheel 71. The arrangement and the functionalities, as well as the design features of the further tensioning wheel 71 can hereby be the same as the design feature of the tensioning wheel 13.

In the Fig. 6 is a further and possibly independent embodiment of the mobile strapping device 1 is shown, again for like parts, the same reference numerals or component designations as in the preceding FIGS. 1 to 5 be used. In order to avoid unnecessary repetition, the detailed description in the previous ones will be used FIGS. 1 to 5 referred or referred.

Fig. 5 shows the schematic representation of another embodiment of the mobile strapping device 1, in which the locking element 30 is designed as a lever, which is designed for fixing the band end 6. The lever is in this case designed so that a clamping effect can be achieved by the return of the strapping 3, and thus the strapping 3 can be held in the manner already described.

In a further embodiment variant can also be provided that instead of the lever, an eccentrically mounted wheel is used as a blocking element 30, wherein this can achieve the same blocking effect.

A power source, which is preferably in the form of a rechargeable battery, in particular as a lithium-ion cell or about lithium-iron phosphate cell is not shown and described.

In a further variant, not shown, it can be provided that the first friction element 46 is designed as a further tensioning roller, which is suitable for increasing the tensioning force in the strapping band 3. The advantage here is that by means of such a first friction element 46, the clamping force can be further increased, the individual load is minimized to the tensioning wheels, or the punctual load on the strapping 3 can be kept low. Furthermore, the full clamping force between the first friction element 46 and the second friction element 47 can be applied directly at the beginning of the clamping process when closing the counter-holder plate 61, since there is no relative movement between the first friction element 46 and the belt end 6 of the strapping belt 3.

In yet another embodiment, not shown, it may be provided that the first friction element 46 is designed as a roller provided with a freewheel, wherein a rotation axis is substantially parallel to the axis of rotation 14 of the tensioning wheel 13. Thus, the band end 6 of the strapping 3 can be easily moved in the clamping direction 29 with fully applied clamping force between the first friction member 46 and the second friction member 47. For welding the strip beginning 5 and the strip end 6, the oscillating sideways movement of the first friction element 46 can then be transferred to the strip end 6.

Furthermore, the housing, and the handle on which the mobile strapping device 1 can be taken by the operator is not shown.

In the Fig. 7 is a further and possibly independent embodiment of the mobile strapping device 1 is shown, again for like parts, the same reference numerals or component designations as in the preceding FIGS. 1 to 5 be used. In order to avoid unnecessary repetition, the detailed description in the previous ones will be used FIGS. 1 to 6 referred or referred. Fig. 7 shows a perspective sectional view of the counter-holder plate 61 with a arranged on the counter-holder plate 61 first counter-holding element 20th

How out Fig. 7 It can be provided clearly that the first counter-holding element 20 is divided into an upper part 76 and a lower part 77. Preferably, the upper part 76 and the lower part 77 abut each other at an inclined plane 78. By this embodiment of the crooked Level 78 can be achieved that a displacement of the upper part 76 in the tangential direction 17 relative to the lower part 77 causes an approximation of the upper part 76 to the tensioning wheel 13. This leads to an increase in the clamping force between the upper part 76 and the tensioning wheel 13. In particular, it can be provided that the upper part 76 is displaced in the tangential direction 17 relative to the lower part 77 by the tensioning movement of the tensioning wheel 13 and by the friction transmitted via the strapping band 3. By the inclined plane 78 while the upper part 76 is moved toward the tensioning wheel 13, whereby the clamping force between the upper part 76 and tensioning wheel 13 is increased. Thus, it can be achieved that the necessary clamping force does not have to be applied by the pivoting movement of the counter-holder plate 61.

As in Fig. 7 Furthermore, it can be provided that the inclined plane 78 is formed in the form of a sawtooth-like profile 79. As a result, the first counter-holding element 20 can be constructed as flat and compact as possible. In particular, the area of the separating cut between upper part 76 and lower part 77 can thereby be kept as small as possible. The size of a pitch angle 80 of the inclined plane 78 is decisive for how large the ratio between displacement of the upper part 76 in the tangential direction 17 and thereby brought about approximation of the upper part 76 to the tensioning wheel 13. The inclined plane 78 can be designed as an alternative variant to a sliding guide, for example, as a ball bearing.

The smaller or shallower the pitch angle 80, the smaller the degree of approach of the upper part 76 to the tensioning wheel 13 at a certain displacement of the upper part 76 in the tangential direction 17. The greater is in return the clamping force, which between the upper part 76 and tensioning wheel thirteenth can be applied. The larger or steeper the pitch angle 80, the greater the degree of approach of the upper part 76 to the tensioning wheel 13 at a certain displacement of the upper part 76 in the tangential direction 17. However, in this case the possible applied clamping force between upper part 76 and tensioning wheel 13 is lower.

In the Fig. 8 is a further and possibly independent embodiment of the mobile strapping device 1 is shown, again for like parts, the same reference numerals or component designations as in the preceding FIGS. 1 to 7 be used. In order to avoid unnecessary repetition, the detailed description in the previous ones FIGS. 1 to 7 referred or referred. Fig. 8 shows a sectional view with section through the Reibschweißvorrichtung 45th

How out Fig. 8 it can be provided that the friction welding device 45 has a force increasing device 81. The force increasing device 81 may include a force increasing member 82 which is plate-like. The force increasing element 82 has a first guide region 83 by means of which it is guided in the base frame 11 of the mobile strapping device 1. The guide region 83 is preferably designed such that the force-increasing element 82 can be displaced parallel to the axis of rotation 14 in the base frame 11. The guide region 83 may be formed, for example, as a sliding surface guide. Alternatively, it can be provided that the guide portion 83 is formed as a linear guide, such as a ball guide.

Furthermore, an inclined plane 84 is provided on the force-increasing element 82, which is arranged at an angle 85 to the guide region 83. The inclined plane 84 can also be designed as a sliding surface guide or as a ball guide. The first friction element 46 is coupled to the inclined plane 84 of the force increasing element 82 such that a displacement of the force increasing element 82 parallel to the axis of rotation 14 causes the first friction element 46 to approach the second friction element 47. As a result, a clamping force between first friction element 46 and second friction element 47 can be applied or increased. Even with this inclined plane 84, the degree of displacement of the first friction element 46 to the second friction element 47 is dependent on the size of the angle 85.

How out Fig. 8 can be further provided that a holder 87 for the first friction member 46 has a recess 88 and is penetrated by the force increasing element 82. The recess 88 or the inclined plane 84 of the force-increasing element 82 act together.

Furthermore, it can be provided that for stabilizing the force increasing element 82, a guide pin 89 is provided, which corresponds to a bore 90 in the force increasing element 82. The guide pin 89 is preferably coupled to the base frame 11.

How out Fig. 8 Furthermore, it can be provided that an eccentric disc 91 is formed, which serves for the displacement of the force increasing element 82. The eccentric disk 91 can be arranged in the mobile strapping device 1 such that it acts on a stop surface 92 of the force-increasing element 82. By rotation of the eccentric 91, the displacement of the force increasing element 82 can be achieved. As an alternative to the eccentric disk 91, it is also possible to provide a crank mechanism for driving the force-increasing element 82.

Furthermore, it can be provided that the same drive unit 86 as for driving the friction welding device 45 is used to drive the force-increasing device 81. It can be provided that at the start of the weld by the Reibschweißvorrichtung 45 and the eccentric 91 is moved, which moves by its eccentricity, the force increasing element 82 parallel to the axis of rotation 14 of the tensioning wheel 13 and thus increases the contact force between the first friction member 46 and second friction member 47 , So that the force-increasing element 82 remains in its clamping position, it can be provided that this is held in position by a fixing device 93. Thus, the eccentric 91 can continue to rotate and need not be decoupled from the drive unit 86. To return the force-increasing element 82 to the rest position, a compression spring 94 may be provided, which returns the force-increasing element 82 as soon as the fixing device 93 is released. It can be provided that the fixing device 93 is released simultaneously with the counter-holder plate 61.

In the method for operating the mobile strapping device 1 can be provided that this runs as stated below. When starting the strapping process can be provided that the counter-holder plate 61 is pivoted into its threading position 63. First, the strapping band 3, which is wound around the packaged goods 2, is inserted into the mobile strapping apparatus 1. If this is apparently positioned correctly, the strapping process is started by the user pressing a start button and thus giving a start command. Subsequently, the counter-holder plate 61 is pivoted into its closed position 64 and thus the strapping 3, in particular the beginning of the band 5 and the band end 6 clamped between tensioning wheel 13 and the first counter-holding element 20. In order to check a correct clamping of the strapping 3, it can be provided that a strapping control device is arranged on the mobile strapping device 1 is. If the tape insertion control device shows a correct position of the strapping band 3, then the tightening process can be continued. The clamping process can be started by pressing the start button again, or by pressing the start button continuously. The clamping operation can be performed in an automatic mode or in a manual mode. In automatic mode, the clamping operation is performed until the strap 3 has reached a preset clamping force. In this case, the start button does not have to be pressed continuously. In manual mode, the clamping process is only carried out as long as the start button is pressed. Again, it can be checked whether a preset clamping force is achieved.

Subsequent to the tensioning of the strapping band 3, the welding of the strapping band 3 takes place. Here too there is the possibility of an automatic mode or a manual mode. In automatic mode, the welding process starts immediately after the clamping process. In manual mode, the start of the welding process must be confirmed by repeated actuation or continuous actuation of the start button. The welding process is carried out for a predetermined time interval. Subsequently, the Reibschweißvorrichtung 45 is stopped and after a predetermined cooling time, a signal may be provided, which signals that the welding process is completed. This signal can be recorded acoustically and / or optically by the user. However, such a signal delivery is not mandatory for the further course. Depending on whether the automatic mode or the manual mode is applied, the counter-holder plate 61 can now be pivoted back into its threading position 63 automatically or by confirmation by means of the start button.

In order to increase the safety in dealing with the mobile strapping device 1, it can be provided that an emergency stop button 95 is arranged on the mobile strapping device 1, through which the strapping process can be interrupted and the strap 3 can be released. The strapping 3 is hereby preferably released by opening the counter-holder plate 61. The emergency stop button 95 is preferably arranged on the mobile strapping device 1 such that it can easily be reached by the user when required.

The embodiments show possible embodiments of the mobile strapping device 1, wherein it should be noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but also various combinations of the individual embodiments are possible with each other and this variation possibility due to the teaching of technical action by objective invention in the skill of those skilled in this technical field.

Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions.

The task underlying the independent inventive solutions can be taken from the description.

All statements of value ranges in the present description should be understood to include any and all sub-ranges thereof, e.g. is the statement 1 to 10 to be understood that all sub-areas, starting from the lower limit 1 and the upper limit 10 are included, ie. all sub-areas begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

Above all, the individual in the Fig. 1 to 4 . 5, and 6 shown embodiments form the subject of independent solutions according to the invention. The relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures.

For the sake of order, it should finally be pointed out that, for better understanding of the structure of the mobile strapping device 1, these or their components have been shown partially unevenly and / or enlarged and / or reduced in size. <B> Reference Numbers </ b> 1 Mobile strapping device 29 tensioning direction 2 packaged goods 30 blocking element 3 strapping 31 second counterholder element 4 loop 32 Surface of the second counter-holder element 5 A tape 6 tape end 33 Surface of the blocking element 7 overlapping section 34 Spring element of the blocking element 8th length 35 translational leadership 9 Surface of the packaged goods 36 Direction of movement of the blocking element 10 endless belt 11 base frame 37 angle 12 jig 38 distance 13 tensioning wheel 39 blocking position 14 axis of rotation 40 guide element 15 lateral surface 41 angle 16 tension 42 body 17 tangential 43 wear member 18 knurling 44 connecting device 19 external surface 45 friction welding 20 first counterholder element 46 first friction element 21 Surface of the first counterholder element 47 second friction element 48 translational leadership 22 Longitudinal alignment of the strapping band 49 rubbing 50 vertical direction of movement 23 X axis 51 Spring element of the friction welding device 24 y-axis 25 z-axis 52 actuator 26 drive unit 53 rest position 27 contact point 54 welding position 28 Band backstop 55 actuating lever 56 driving lug 89 guide pin 57 cutting device 90 drilling 58 cutting blade 91 eccentric 59 Spring element of the cutting blade 92 stop surface 60 cutting edge 93 fixing 61 Backing board 94 compression spring 62 adjustment 95 Emergency stop button 63 threading 64 closed position 65 swivel 66 opening angle 67 further drive unit 68 maintenance position 69 stop element 70 working surface 71 another tensioning wheel 72 additional clamping force 73 axis of rotation 74 swivel axis 75 wedge-shaped insertion area 76 top 77 lower part 78 inclined plane 79 sawtooth profile 80 lead angle 81 Force increasing device 82 Force increasing element 83 first management area 84 inclined plane 85 angle 86 drive unit 87 Holder first friction element 88 recess

Claims (19)

1. A mobile strapping device (1) for strapping packaged goods (2) with a strap (3), in particular a plastic strap, comprising a base frame (11), a tensioning device (12) with at least one tension wheel (13) for applying a tension force (16) acting in a tangential direction (17) to a shell surface (15) of the at least one tension wheel (13) on a loop (4) of the strap (3) slung around a packaged good (2), a drive unit (26) provided at least for driving the at least one tension wheel (13), a counter-holder element (20) that interacts with the at least one tension wheel (13) and is accommodated in a counter-holder plate (61), a connecting device (44) for connecting the two overlapping sections (7) of the loop (4) of the strap (3), a cutting device (57) for cutting the strap (3), and an energy supply source to provide operating power, wherein the counter-holder plate (61) is mounted on the base frame (11) so that it can move relative to the latter, and can be adjusted by means of an adjustment device (62) between a threading position (63) and a closed position (64), and a surface (21) of the counter-holder plate (61) allocated to the tension wheel (13), which in its closed position (64) is arranged essentially parallel to a rotational axis (14) of the at least one tension wheel (13), wherein the counter-holder plate (61) is mounted to the base frame (11) by means of a swivel joint (65), characterized in that a rotational axis (73) of the swivel joint (65) is arranged essentially parallel to a tangential direction (17) of the tension wheel (13), so that the counter-holder plate (61) is pivotably mounted to the base frame (11), and forms a wedge-shaped insertion area (75) in relation to the tension wheel (13) in the threading position (63).
2. The mobile strapping device according to claim 1, characterized in that the counter-holder plate (61) is inclined at an opening angle (66) of between 3° and 30° in the threading position (63) relative to the closed position (64).
3. The mobile strapping device according to claim 1 or 2, characterized in that the counter-holder plate (61) can be switched into a maintenance position (68), in which it can be swiveled out by at least 45° relative to the closed position (64).
4. The mobile strapping device according to one of the preceding claims, characterized in that the connecting device (44) has a friction welding device (45), which comprises a first friction element (46) and a second friction element (47), wherein the strap (3) can be clamped between these friction elements (46, 47), and wherein the first friction element (46) can be shifted in an oscillating movement relative to the second friction element (47) in a frictional direction (49) running parallel to the rotational axis (14) of the tension wheel (13).
5. The mobile strapping device according to claim 4, characterized in that the second friction element (47) is accommodated in the counter-holder plate (61), or that the counter-holder plate (61) is designed as a second friction element (47).
6. The mobile strapping device according to one of the preceding claims, characterized in that the side of the counter-holder element (20) arranged in the counter-holder plate (61) facing the tension wheel (13) as adjusted to the shape of the shell surface (15) of the tension wheel (13) at least in sections, and provided with a contoured surface (21).
7. The mobile strapping device according to one of the preceding claims, characterized in that a strap non-return device (28) is provided, which can be used to fix the clamping force applied by the tensioning device (12) to the strap (3) when the tension force (16) applied by the tensioning device (12) is lowered or elevated, wherein the strap non-return device (28) comprises a locking element (30), which interacts with a second counter-holder element (31), wherein the second counter-holder element (31) is accommodated in the counter-holder plate (61).
8. The mobile strapping device according to one of the preceding claims, characterized in that a cutting device (57) is provided, which can be used to cut the strap (3).
9. The mobile strapping device according to claim 8, characterized in that the cutting device (57) is directly adjacent to the first friction element (46) of the friction welding device (45), wherein the first friction element (46) can move relative to the cutting device (57) that is fixed in place relative to the base frame (11) in the active state of the friction welding device (45).
10. The mobile strapping device according to one of the preceding claims, characterized in that working surfaces (70) of the second friction element (47) of the friction welding device (45), the second counter-holder element (31) of the strap non-return device (28) and the first counter-holder element (20) of the tensioning device (12) are essentially arranged in one plane, so that these devices can guide the strap (3) approximately straight and parallel to the surface (9) of the packaged good (2).
11. The mobile strapping device according to one of the preceding claims, characterized in that a shared, integral counter-holder plate (61) is provided for the friction welding device (45) and tensioning device (12).
12. The mobile strapping device according to one of the preceding claims, characterized in that a shared, integral counter-holder plate (61) is provided for the friction welding device (45), belt non-return device (28) and tensioning device (12).
13. The mobile strapping device according to one of the preceding claims, characterized in that the first counter-holder element (20) and/or the second counter-holder element (31) and/or the second friction element (47) is pivotably accommodated in the counter-holder plate (61), wherein their pivoting axis (74) respectively runs parallel to the rotational axis (73) of the swivel joint (65).
14. The mobile strapping device according to one of the preceding claims, characterized in that the counter-holder element (20) has an upper part (76) facing the tension wheel (13) and a lower part (77) facing the counter-holder plate (61), wherein the upper part (76) is coupled with the lower part (77) by a slanted plane (78), wherein a distance between the tension wheel (13) and upper part (76) can be adjusted in such a way that the upper part (76) can shift relative to the lower part (77) in a tangential direction (17) of the tension wheel (13).
15. The mobile strapping device according to claim 14, characterized in that the slanted plane (78) is formed by a saw-tooth profile (79).
16. The mobile strapping device according to one of the preceding claims, characterized in that the friction welding device (45) has a force increasing device (81), which can be used to press the first friction element (46) against the second friction element (47), wherein the force increasing device (81) has a slanted plane (84), and the distance between the two friction elements (46, 47) can be adjusted by shifting the force increasing device (81) parallel to the rotational axis (14).
17. The mobile strapping device according to one of the preceding claims, characterized in that the force increasing device (81) and first friction element (46) can be driven by the same drive unit (86).
18. A method for operating a mobile strapping device (1), in particular the mobile strapping device (1) according to one of the preceding claims, characterized in that the method comprises the following procedural steps:

    - Introducing the strap (3) into the mobile strapping device (1), in which a counter-holder plate (61) with a first counter-holder element (20) arranged thereon and further a second friction element (47) arranged on the counter-holder plate (61) is pivoted around a rotational axis (73) of a swivel joint (65), so that the counter-holder plate (61) forms a wedge-shaped introduction area (75) relative to a tension wheel (13) in a threading position (63), wherein the first counter-holder element (20) is arranged opposite the tension wheel (13) and the second friction element (47) is arranged opposite a first friction element (46), and wherein the strap (3) is introduced between the tension wheel (13) and first counter-holder element (20), as well as between the first friction element (46) and second friction element (47), wherein the rotational axis (73) of the swivel joint (65) is essentially arranged parallel to the tangential direction (17) of the tension wheel (13);

    - Starting the pivoting process of the counter-holder plate (61) via a start command entered with a start button;

    - Pivoting the counter-holder plate (61) around the rotational axis (73) in order to clamp the strap (3) between the tension wheel (13) and the first counter-holder element (20) arranged on the counter-holder plate (61);

    - Checking the strap insertion condition by means of a strap insertion checking device;

    - Starting the process of tensioning the strap (3) via a start command entered with the start button;

    - Checking the applied tension by means of a clamping force monitoring unit;

    - Starting the welding process once a prescribed tension has been reached;

    - Performing the welding process for a prescribed period of time by moving the first friction element (46) relative to the second friction element (47);

    - Stopping the first friction element (46) for a prescribed period of time for solidifying the weld;

    - Pivoting the counter-holder plate (61) around the rotational axis (73) in order to release the strap (3).
19. The method according to claim 18, characterized in that the sequence of individual procedural steps can be interrupted by the user, wherein an emergency stop switch (95) is provided, and can be actuated by the user to interrupt the procedural steps.

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