EP1260439B1 - Tying device presenting exchangable wear pieces - Google Patents

Abstract

The strapping device has a base plate with bearing surface (2a) for mounting on the packed goods and a tensioner for tightening up the strap. The tensioner, closing tool as well as cutters (21) for the strap are detachably fixed on the strapping device by fasteners and several fasteners are configured so that they can be actuated by the same tool. The closing tool can comprise a matrix and ram for clamping the two strap layers together.

Description

The invention relates to a strapping device for strapping of a packaged good with a strapping that has a base plate has that with a support surface for arrangement is provided on a packaged product, the strapping device further has a tensioning device with which on the strapping a belt tension can be applied, the tensioning device for this purpose is provided with an actuatable clamping tool, which can be brought into contact with the band, the tensioning tool with at least a first fastener on Strapping device is releasably attached, also a closing device has the closing device with provide a one- or multi-part closing tool with which there are two layers of tape by contact with the tape Allow to be permanently connected with each other using the closing tool with at least one detachable further fastening means is attached to the strapping tool, the strapping tool is further provided with a release agent which the tape can be cut, the release agent for this has a knife which can be brought into contact with the band, wherein at least part of the release agent with at least one other releasable fasteners on the strapping tool releasable is appropriate.

Such strapping tools are often for mobile use provided for a user anywhere Strapping packaged goods with a steel band. A first genus this strapping device typically has a closing device by multiple notches, without using an additional closing element, such as for example a seal, a connection of two layers of the steel strip. For this type of strapping tool it is also typical that both the tape tension as well as the closure formation manually without the aid of External energy, especially electrical or pneumatic Energy that is generated. The operator of a generic The strapping tool only has its own muscle strength to disposal. The invention is also suitable for another type of strapping tool in which either a closing element, like the one already mentioned Seal, or auxiliary energy, such as electrical or pneumatic energy to create a welded joint with plastic tapes.

The described types of strapping tools, however common that usually by means of a rotating Tensioning wheel applied the required tape tension to the tape becomes. Due to a frictional connection between the tensioning wheel and the band position in contact with it, the Belt position moved towards a supply roll of the belt be, which makes the strap loop smaller and the strap tension consequently gets bigger. Except those already mentioned Manually operated clamping devices can be used with generic Strapping tools also provided tensioning devices be the electrical, pneumatic or other Use auxiliary energy to generate the belt tension.

Almost all components in contact with the belt such strapping tools are subject to wear. Such components in particular regularly wear out, whose function it is to act on the tape, be it by friction, frictional engagement or by deformation of the Band. Wear parts of this type must therefore be used regularly be replaced. In the previously known Strapping tools can not be satisfactory in this context, that to replace the wear parts great maintenance is required.

The CH-PS 477 955 shows a portable one Strapping tool used to achieve a low Maintenance effort with wear-resistant bearings and bushings is provided. As another reduction measure the maintenance effort is also a releasable attachment viewed a band support plate on the frame of the device, by which make a device accessible for maintenance work should, with the clamp connections of the tape can be generated. Furthermore, a variety of other components of the Device with various fasteners on the strapping tool appropriate. Despite these measures, this too the previously known strapping tool does not require maintenance satisfy.

The invention is therefore based on the object of a strapping tool to create, with the wearing parts as possible little maintenance effort can be exchanged.

This object is achieved in a strapping tool according to claim 1 solved. fastener of the wearing parts should therefore be sent to the points provided for engaging the tool according to the invention have a design through which a release and attaching these fasteners with a total of only a tool is possible. According to the invention, in particular at least the wear parts with the same Tool loosened on the strapping tool, exchanged for new parts and reattach them with the same tool where it is foreseeable that on the one hand they will be regular and be exchanged at the same time. in this connection can be one or more wear parts of the Act closure device and / or the release agent. This can be, for example, a die and a stamp one intended for closing a tape loop Notching tool of the closing device and a knife of the Release agents include. Instead of one of the above Wear parts or in addition to these can also be a Tensioning wheel of the tensioning device can be provided, which also is interchangeable with the same tool.

The invention is therefore based on the idea of maintenance by reducing the necessary handling steps and reducing the number of stocks to be stocked Simplify tools. For the replacement of all wearing parts is only one Screwdriver required. The strapping tool and that to it suitable tools can also be understood as a maintenance system become. Since strapping tools mostly in industrial companies are used in which such standard tools are available maintenance work can be done practically anywhere in the world by the user himself. In particular results in mobile portable strapping devices this has the advantage that wear parts by the user himself can be changed very quickly on site without the service of the device manufacturer or a workshop is required.

The ease of maintenance of strapping devices according to the invention can be increased again if wearing parts or their fasteners on the strapping tool are accessible from the outside. According to the invention, fastenings the wearing parts can be solved without that other than with the corresponding wear part related components must be removed. For example, in connection with the wearing part Covers or components made by the same fastener held or clamped. It should in particular no components of the strapping device have to be removed, with which movements of the strapping tool are generated, like shafts and levers, and those after the exchange the wear parts would have to be readjusted again.

The tool is a screwdriver of a certain size, for example size 4. Of course, others could too Sizes should be provided.

Further preferred configurations of the invention result itself from the dependent claims, the description of the figures and the drawing.

Fig. 1

eine perspektivische Darstellung eines erfindungsgemässen Umreifungsgerätes;

Fig.2

das Umreifungsgerät von Fig.1 in einer anderen perspektivischen Darstellung;

Fig. 3a

eine Längsschnittdarstellung des Umreifungsgerätes von Fig. 1, bei dem sich der Verschliesserhebel in einer Offen-Endlage befindet;

Fig. 3b

eine Darstellung des Umreifungsgerätes gemäss Fig. 3a, in der der Verschliesserhebel in der Verschliess-Endlage gezeigt ist;

Fig. 4

eine perspektivische Explosionsdarstellung des Umreifungsgerätes von Fig. 1;

Fig. 5

eine perspektivische Darstellung einer Matrize und einer Trenneinrichtung des Umreifungsgerätes von vorne;

Fig. 6

eine perspektivische Darstellung der Matrize und der Trenneinrichtung aus Fig. 5 von hinten;

Fig. 7

eine Längsschnittdarstellung des Umreifungsgerätes von Fig. 1 während der Erzeugung einer Umreifung eines Packgutes.

The invention is explained in more detail with reference to the exemplary embodiments shown schematically in the figures; show it:

Fig. 1

a perspective view of a strapping device according to the invention;

Fig.2

the strapping device of Figure 1 in another perspective view;

Fig. 3a

a longitudinal sectional view of the strapping device of Figure 1, in which the closer lever is in an open end position.

Fig. 3b

a representation of the strapping device according to Figure 3a, in which the closer lever is shown in the closing end position;

Fig. 4

a perspective exploded view of the strapping device of Fig. 1;

Fig. 5

a perspective view of a die and a separating device of the strapping device from the front;

Fig. 6

a perspective view of the die and the separating device of Figure 5 from behind.

Fig. 7

a longitudinal sectional view of the strapping device of FIG. 1 during the production of a strapping of a packaged goods.

1 and 2 is an exclusively manually operated portable handling device shown. With the strapping tool can stretch a belt loop around a packaged product, closed and separated from a tape supply roll become.

The strapping tool has as part of a carrier 1 a base plate 2, with the lower bearing surface 2a the strapping tool on a purely schematic only in Fig. 9 Packaged goods shown can be arranged. How in particular 3a and 3b can be seen in a Recess of the base plate 2 from above a stamp 3 in the Base plate 2 used. The stamp 3 is at least by means of one from the support surface 2a of the base plate 2 inserted slotted screw 4 and two in the base plate fixed bolt pins 5 attached to the base plate. The stamp 3 is part of a closing device. Towards the rear end of the base plate is immediate behind the stamp a contact surface 2b of the base plate 2 provided. In the area of the rear end of the Finally, the base plate is one in the base plate a top profiled tooth plate 7 used against which rests on a holding plate 8. The holding plate 8 is also from the support side 2a with two slotted screws 9, 10 (Fig. 3a, 4) releasably attached to the base plate 2 and thus fixes the tooth plate 7. A slot width and Slot depth of the heads of the slotted screws 4, 9, 10 are trained identically.

In the area of a front end of the base plate is at one Bearing point of the carrier 1, a die carrier 11 is pivotable mounted around a bearing axis 14 (Fig. 2 and 3a). The die holder 11 can be between the open end position and a closing end position be pivoted and is a component of from a closing device. The die holder points a two-part die 15 shown in FIGS. 5 and 6. In 3a is only the front die part 15a of the two die parts 15a, 15b visible. As Fig. 3a shows, the die 15 is on one of the base plate facing Bottom 11a of the die holder 11 in a recess used. To attach the die 15, this is on a pin 16 of the die holder 11 is pushed on and by means of two identical slotted screws 17, 18 (Fig. 1, 3a, 5) screwed to the die holder 11. A slot width and Slot depth of the heads 17a, 18a of the two screws 17, 18 are with the slot widths of the screw heads 4, 9, 10 identical.

Geometric shapes of the die 15 and the stamp 3 can essentially corresponding to that in DE 38 41 489 C2 or of the closing tools shown in CH 659 221 A5 his.

On the underside 11a of the pivotable die carrier in the clamping direction (arrow 19 in FIG. 3a) behind the die 15 also a separator arranged with an adjusting wedge 20 and a notch knife 21 provided as a notching tool is. As can be seen in the detailed representations of FIGS. 5, 6 is, the adjusting wedge 20 with an inclined Provide adjustment surface 20a. The adjusting wedge 20 is inserted into a recess in the die carrier 11 (cf. Fig. 3a). Its insertion depth, which runs perpendicular to the band alignment can be adjusted continuously by means of an adjusting screw 24 can be set. The one accessible from the side of the strapping tool Adjustment screw 24 engages in a thread of the Die carrier 11 a.

The notch knife 21 is also below the adjusting wedge 20 inserted into the die holder 11 and is there clamped by two identical slotted screws 25, 26. The knife lies with an inclined contact surface 21a Adjustment area opposite. The inclination of the contact surface 21a corresponds to the inclination of the adjustment surface 20a, whereby both Surfaces 20a, 21a abut each other. On its the base plate 2 facing side, the knife 21 has a notch edge 21b. The knife 21 is also with two side, provided in approximately circular arc-shaped grooves 21c, in each of which a screw head 25a, 26a is arranged. As a result, the knife 21 is on the one hand on peripheral surfaces of the screw heads 25a, 26a of the two screws. On the other hand define the two acting as stops Screw heads 25a, 26a also in the direction of the insertion depth of the knife 21, its position in the die holder 11. For actuation the slotted screws 24, 25 can be the same Screwdriver to be used, the same to the others Screws 4, 9, 10, 17, 18 fits. This can result in a notch edge 21b of the notch knife with a predetermined length protrude beyond the bottom 11a. This supernatant can especially depending on the wear condition of the knife 21 and from the positions of the surfaces with which the Stamp 3 and die 15 deform the tape by screwing depths the screws 24, 25 continuously adjusted become.

On an upper side facing away from the base plate 2, the Die carrier 11 a receptacle 27 for a transmission element 28 on (Fig. 3a, 3b). The recording 27 is in this approximately fork-shaped, the two fork struts 27a, 27b are each bent towards one another. The one behind End of the base plate 2 closer fork strut 27b is with a inner rolling surface 27c, which is shaped so that the transmission element 28 during a pivoting movement of the die carrier 11 over a certain distance on it can pass on. The shape of the other fork stay 27a is in this regard designed that the transmission element 28 itself with pivoting movements on the one hand in the predetermined manner can move in the receptacle 27, but on the other hand safely is held between the two fork struts 27a, 27b.

In the illustrated embodiment, the transmission element 28 one with its eccentric axis 29 with respect to an axis of rotation 30 of a rotary bearing arranged eccentrically Role. The eccentricity is designated E in FIGS. 3a, 3b. The pivot bearing and thus the die holder 11 can can be operated via a closing lever 33, which with a rotary shaft 31 (Fig. 1 and 2) of the rotary bearing rotatably connected is.

As can be seen in FIG. 2, the transmission element is on one 28 opposite end of the rotary shaft 31 a rocker 34 of the clamping device is rotatably mounted. The Rocker 34 is supported by a spring 35 on the carrier 1 (Fig. 3a). Since the rocker 34 is arranged on the same shaft like the closing lever 33, the axis of rotation is aligned 30, with which the closing lever 33 the rotary shaft 31st rotated, with a pivot axis of the rocker 34. However, after the rocker 34 with not shown in detail Radial bearings arranged on the rotary shaft are rotary movements the rotary shaft is decoupled from the pivoting movement of the rocker 34. Both the axis of rotation 24 and the one coinciding with it The pivot axis is essentially parallel to the bearing axis 14 of the die carrier.

On the side of the die carrier 11, the rocker 34 has one Bearing plate 36, which in the region of its two ends a circular recess 36a and a pin 36b is (Fig. 2 and 4). The recess 36a is for arrangement on one end of the rotary shaft 31 and the pin 36b for insertion provided in the tension shaft 37. About between Recess 36a and pin 36b is in the bearing plate 36 a through hole 38 is present, which is used to attach the Bearing plate 34 with a socket screw 39 on an internal thread an extension 40 of the carrier is used. Also the slotted head 39a of the shaft screw 39 can be due the width and depth of the slot with the screwdriver with the other screws 9, 10, 17, 18, 24, 25, 26 can be loosened and tightened.

1 and 3a is also a with the rocker 34 Handle 41 firmly connected, with which the rocker 34 is in shape a pivoting movement about the axis of rotation 30 or pivot axis can be operated. With the handle 41, the rocker 34 can counter the action of the compression spring 35 from one shown in the figures Tension position in which a tension wheel 44 (Fig. 3a) against the tooth plate 7 or one guided over the tooth plate 7 Band, lies in a neutral, not shown in the figures End position and pivoted back into the clamping position become. In the neutral end position, the tensioning wheel 44 is at a distance arranged to the tooth plate 7. Without on the rocker 34 to act, this takes due to the spring force acting on them always the clamping position.

At one end opposite the axis of rotation 30 (FIG. 2) the rocker 34, a clamping lever 45 is attached, with which the Tensioning wheel 44 (Fig. 3a) can be rotated. As can be seen in particular from FIGS. 1 and 4, is the tensioning shaft 37 in a cylinder part 46 of the rocker 34 rotatably mounted. Located at both ends of the tension shaft 37 on the one hand the clamping lever 45 and on the other hand the tensioning wheel 44 arranged in a rotationally fixed manner on the tensioning shaft 37. The clamping lever 45 is from a first to a second end position movable back and forth, being only in one direction is rotatably connected to the tension shaft 37. In relation there is no rotary connection to the other direction of rotation the tension shaft 37, whereby the tension lever 45 in from its second end position are moved back to the first end position can, without taking the tensioning wheel 44 with it. So it is possible with the tensioning lever 45 the tensioning wheel only in To move the clamping direction.

To with the strapping device according to the invention shown a band loop around one shown only schematically in FIG. 7 Tensioning the packaged goods 47 can initially be the band 48 be placed loosely around the packaged goods 47, so that in the area of the free tape end 49 two tape layers 50, 51 lie one above the other. Then the strapping tool with its contact surface 2a of the base plate 2 arranged on the packaged goods 47, wherein the die holder 11 in its open end position and the tensioning wheel 44 are arranged in its neutral end position. Thereby can the two superposed band layers 50, 51 are guided over the base plate 2 of the strapping tool, so that the tape is between the die 15 and the punch 3 is located. By pivoting the rocker 34 against the spring force of the compression spring 35 can then also between the tension wheel 44 and the tooth plate 7 created a gap become. For this purpose, an operator can handle 41 and the closing lever arranged in its open end position 33 grasp with one hand and the handle 41 in the direction of Push the closing lever 33 upwards. After the two Band layers 50, 51 are inserted into the gap, the Handle 41 released, whereby the compression spring 35, the rocker 34 back towards the tooth plate 7 in its clamping position moved back. The two belt layers 50, 51 are thereby clamped between the tensioning wheel 44 and the tooth plate 7. Here, the lower band layer 51 lies with the free band end 49 on the stamp 3 and the contact surface 2b of the base plate 2 on. The leading to a supply role, not shown other tape layer 50 is located above the free tape end 49 and protrudes from the strapping tool behind the tensioning wheel 44 out. This situation is shown in Fig. 7.

Now the strap loop can be operated by operating the tensioning lever 45 be excited. The clamping lever 45 is between its two end positions swung back and forth several times. at its counterclockwise pivoting movement (with respect to 3a, 3b, 7) is the tensioning lever 45 coupled to the tensioning wheel 44. The tension wheel 44 is thus in a counterclockwise rotation. Due to a frictional connection between the upper band layer 50 and the tensioning wheel 44, the upper band ply 50 is made further pulled out the strapping tool and the strap loop with tension. The lower band layer 51, however, is by the profiling of the tooth plate 7 unchanged in Position held. During the pivoting movement of the tensioning lever 45 clockwise, however, is the operative connection between the tensioning lever 45 and the tensioning wheel 44 are canceled. The tension wheel 44 thus remains in its current rotational position. The oscillating movement of the tension lever is repeated until sufficient tension is applied to the tape is.

The strap loop is then closed. For this purpose, the closing lever 33 and the transmission element 28 from the open end position (Fig. 3a) in the closing end position (Fig. 3b) transferred. In the illustrated embodiment sets the closing lever 33 here an angle of rotation α of approximately 140 ° back. The eccentrically The roller rolls on the surface 27c of the receptacle 27 from. The eccentricity E of the transmission element 28 rotates in the same direction as that Closing lever 33.

This reliably ensures that the die 15 and the stamp 3 in volume 48 itself an additive-free, i.e. especially a seal and sweat-free Closure, which is formed even with high band tension does not solve. Immediately before reaching the closing end position notches the cutting edge 21b of the knife 21 in the upper layer 50, still connected to a tape supply and separates them from the tape supply. following the closing lever 33 can be returned to its open end position transferred, the tensioning wheel by actuating the rocker 34 from The tape is lifted off and the strapping tool is moved away from the side removed from the now finished tape loop become.

After a large number of such strapping processes, the components in contact with the band 48 due to Wear to change. The one used in the base plate 2 Stamp 3 can be loosened with a flat-blade screwdriver 54 of the accessible from the support page 2a Slotted screw 4 removed and a new stamp be replaced. To attach the new stamp is to put this on the two pins 5 and only the Reinstall screw 4. Due to the size of the Screw head 4a or the slot of the screw 4 can use a size 4 screwdriver 54.

To exchange the two parts 15a, 15b of the die 15 are the Screws accessible from one side of the strapping tool 17, 18 to solve. The slot width and depth of the heads 17a, 18a of the screws 17, 18 correspond to the head 4a of the Screw 4, which is why the slotted screwdriver is also used 54 size 4 can be used. Subsequently the die 15 can be removed from the pin 16 and against a new die can be exchanged. This is done by means of the two Screws 17, 18 reattached to the die holder 11.

The knife 21 of the separation device can after loosening the Slotted screw 25 pulled out of the die holder 11 become. The same screwdriver 54 can also be used for this are also operated with the screws 4, 17, 18 were. After a new knife 21 and its attachment and adjustment the screw 25 is reinserted the adjusting screw 24 with the same screwdriver 54 the adjusting wedge 20 (FIG. 5) of the separating device is adjusted become. The slot width of this screw 24 also corresponds the slot widths of the other screws 4, 17, 18. Thus is also used to set the notch depth of the cutting device no additional tools required.

To change the tooth plate 7 of the clamping device both accessible from the support side 2a of the base plate Loosen slotted screw 9, 10. These screws 9, 10 have the same slot size as the screw 4 of the punch 3 and can therefore also be operated with the same tool become. After loosening the screws 9, 10, the Holding plate 8 and the tooth plate 7 parallel to the clamping direction (Arrow 19) can be removed from the base plate 2. Now a new tooth plate and the previous holding plate 8 inserted and the screws 9, 10 again with the screwdriver 54 from the support side 2a into the base plate screwed.

To the worn idler 44 against a new idler replace, the socket head screw 39 is to be loosened Slot of the screw head 39a also the screwdriver 54 size 4 fits. 4 can be seen afterwards the bearing plate 36, a first spacer ring 55, a band guide ring 56, a second spacer ring 57 and finally the tensioning wheel 44 are withdrawn from the tensioning shaft 37. After a new tensioning wheel is pushed onto the tensioning shaft 37 is, the aforementioned components can be reversed Sequence also mounted again on the tension shaft 37 and the bearing plate 36 with the screw 39 on the extension 40 be attached.

Claims (10)

1. A strapping device for the strapping of packaged merchandise with a strapping band, which
   has a base plate (2), which is provided with a bearing surface (2a) for arrangement on packaged merchandise,
   has a tensioning device, with which a band tension can be applied to the strapping band, the tensioning device is provided for this purpose with an operable tensioning tool which can be brought into contact with the band, whereby the tensioning tool is fixed detachably to the strapping device with at least one fixing means,
   has a closure device, which closure device is provided with a single- or multi-part closure tool, with which, through contact with the band, two band layers can be permanently joined together, whereby the closure tool is fixed to the strapping device with at least one detachable further fixing means,
   the strapping device is further provided with separating means, with which the band can be separated, the separating means have for this purpose a knife (21) which can be brought into contact with the band, whereby at least one part of the separating means is fixed detachably to the strapping device with at least one further detachable fixing means,
   characterised in that

   the at least one fixing means for the tensioning tool of the tensioning device,

   the at least one further fixing means for the closure tool of the closing device, and

   the at least one further fixing means for the at least one part of the separating means

   are screws (4, 9, 10, 17, 18, 24, 25, 26, 39) and have a design by means of which operation of these fixing means is possible with only one screwdriver (54).
2. The strapping device according to claim 1, characterised in that fixing means of at least parts of the closure tool and of the tensioning tool can be operated with the same screwdriver (54).
3. The strapping device according to claim 1, characterised in that fixing means of at least parts of the closure device and of the tensioning device can be operated with the same screwdriver (54).
4. The strapping device according to one or more of the preceding claims, characterised in that the closure device permits the creation of an additive-free closure of two band layers and for this purpose the closure tool has as a first part a die (15) and as a second part a stamp (3), between which two band layers can be arranged and notched, whereby at least fixing means of one of the two closure tool parts and fixing means of the tensioning tool can be operated with the same screwdriver (54).
5. The strapping device according to claim 4, characterised in that fixing means of the second closure tool part are also replaceable with the same screwdriver (54).
6. The strapping device according to one or more of the preceding claims, characterised in that the tensioning tool has a tensioning wheel (44), whose fixing meanings can also be operated with the same screwdriver (54).
7. The strapping device according to one or more of the preceding claims, characterised in that the tensioning device has a toothed plate (7), a further fixing means is provided with which the toothed plate (7) can be fixed detachably to the strapping device, whereby the fixing means for the toothed plate (7) can also be operated with the same screwdriver (54).
8. The strapping device according to one or more of the preceding claims, characterised in that the fixing means of the knife (21) can be operated with the same screwdriver (54) as the other fixing means.
9. The strapping device according to one or more of the preceding claims, characterised in that all the fixing means of components of the strapping device that are wearing and in contact with the band can be detached and fastened with the same screwdriver (54).
10. The strapping device according to one or more of the preceding claims, characterised in that the fixing means on the strapping device that are operable with the same screwdriver (54) are accessible from the exterior, without dismantling of other components of the strapping device being required for this.

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