EP2069206A1

EP2069206A1 - Packaging apparatus, locking mechanism for a packaging apparatus, and method for operating the former

Info

Publication number: EP2069206A1
Application number: EP06792104A
Authority: EP
Inventors: Per Lachenmeier
Original assignee: Lachenmeier ApS
Current assignee: Illinois Tool Works Inc
Priority date: 2006-09-15
Filing date: 2006-09-15
Publication date: 2009-06-17
Anticipated expiration: 2026-09-15
Also published as: ATE455702T1; DE502006006017D1; CN101522527A; CN101522527B; MX2009002549A; KR101518983B1; US7913476B2; EP2069206B1; JP2010503584A; KR20090051220A; CA2662631A1; ES2339595T3; JP5129252B2; BRPI0622000A8; PL2069206T3; US20090272080A1; BRPI0622000A2; CA2662631C; WO2008031449A1

Abstract

A wrapping device 1 for packaging goods, specifically goods stacked on pallets or the like, with a tube-like film, with a film feeding device 4 with fusion and cutting systems to generate and feed a dome-like film cover within a device frame 6, where film feeding device 4 works in conjunction with a covering device 7 that moves vertically up and down within device frame 6, where covering device 7 is designed to grasp the film cover and place it to cover goods located in the lower segment of device frame 6, is characterized by having film feeding device 4 move vertically within device frame 6. This arrangement simplifies installation, maintenance and repairs, specifically to the film feeding device.

Description

DESCRIPTION

Packaging device, latching mechanism for a packaging device and method of operating the same

The invention relates to a packaging device for packaging goods, in particular palletized or the like. Stacked goods, with a tubular film, in which for producing and supplying a hood-like film envelope within a frame, a film feeding device with welding and cutting arrangement is provided with a cooperates within the frame vertically upwardly and downwardly movable coating device, which is designed for gripping the film envelope and for covering the same over the arranged in a lower region of the frame goods.

Furthermore, the invention relates to a latching mechanism for a packaging device and a method for operating such.

Methods and devices for packaging goods by means of a tubular film are already known from the prior art. For example, packaging devices of the aforementioned type regularly a film feeding device with welding and cutting assembly and a coating device, wherein the film feeding device is fixed together with welding and cutting assembly within a frame above the coating device. By means of the film feed device a section of a tubular film is removed from a supply of film, welded to a film wrap or film hood and cut off above the weld. Subsequently, the coating device engages the film hood thus produced, opens it and moves with her inside the frame down, whereby the film hood for packing the goods arranged in the lower region of the frame is pulled over this.

It is provided in known packaging devices of the type mentioned on the outside of a staircase to a arranged at the upper end of the device maintenance or service platform. This is necessary to allow a maintenance mechanic in the known from the prior art packaging devices access to the fixed in the upper part of the device film feeding device including welding and cutting assembly. This serves to carry out maintenance and service work, such as knife or welding wire replacement, maintenance, film change or the like.

To simplify the nomenclature, the film feed device with welding and cutting arrangement is referred to below as "film feed device" for short, which at the same time also encompasses the aforementioned welding and cutting arrangement.

To be regarded as disadvantageous in the prior art devices in particular that by providing a staircase and a corresponding platform in the upper part of the packaging device an increase in the price of equipment must be accepted. In addition, since the above-mentioned maintenance and repair work must be performed at a great height above the device, resulting in a total of difficult working conditions associated with appropriate safety requirements.

The invention has for its object to further develop a packaging device of the type mentioned above and to provide a method for their operation that a facilitated maintenance or maintenance of the packaging device is possible. At the same time, the purchase price of the packaging device should be lowered and the operational and maintenance safety increased. To achieve the object, it is provided according to a first aspect of the present invention in a packaging device of the type mentioned, that the Folienvor- push device is arranged vertically movable within the frame.

According to a second aspect of the present invention, a latching mechanism for vertically fixing a vertically movable within a frame film feed device with welding and cutting arrangement, in particular for a packaging device according to the invention, further proposed to achieve the above object, wherein the latching mechanism includes a toggle which um a first pivot axis arranged transversely to the vertical direction of movement of the film feed device can be pivoted and has an inner catch recess facing the film feed device. In this case, a ramp region of the toggle lever is formed so complementary to a latching projection on the film feed device that vertical upward movement of the film feed device, a pivoting of the toggle lever is effected to the outside until the locking projection engages for fixing the film feeding device against a downward movement in a detent position in the recess.

According to a third aspect of the present invention, this provides a method for operating a packaging device according to the invention, in particular using the locking mechanism defined above, wherein for the packaging of goods moves the film feeding device within the frame in an upper operating position and fixed in this is and wherein for access to the film feeding device, eg for maintenance purposes, this is moved within the frame in a lowered lower position.

According to a basic idea of the present invention, a lowering of the film feeding device within the receiving frame is thus possible downwards. Maintenance and repair work can be carried out in a comfortable position and at a low altitude. The required in devices of the prior art stairs including maintenance platform has thus become redundant. Rather, a maintenance technician can comfortably wait or repair the foil feed device from a standing position. After performing maintenance or repair, the film feed device can be vice versa process again in a desired operating position in the upper part of the packaging device. The saving of the stairs and the maintenance platform reduces the price of the device according to the invention. In addition, there is an increase in operational and maintenance safety.

In a further development of the packaging device according to the invention, provision can be made for the film feed device to be arranged on a frame which is vertically movable within the device frame. Thus, a lowering of the film feeding device is possible via a movement of the frame down along the device frame.

In another embodiment of the Verpackungsvoπϊchtung invention is provided that the film feeding device is movable between an upper operating position and a lower maintenance position. Such an embodiment of the device according to the invention therefore has two positions of the movable film feeding device, namely a first upper operating position, preferably at the upper end of the frame, and a second maintenance or service position at the lower end of the frame and possibly above a transport unit, there may be provided for supplying or discharging goods. Between these two positions, the film feeding device is movable.

In the course of another development of the packaging device according to the invention, it may be provided that at least one blocking device for fixing the film feeding device in a corresponding position is provided on the frame for the film feeding device. In particular, in the upper operating position, an embodiment of the packaging device according to the invention therefore on the device frame on a locking device for fixing the film feed device or the frame in the upper operating position. The locking device can be solved or locked automatically or remotely, so as to fix the film feeding device in the upper position or to move from this position. In another embodiment of the packaging device according to the invention, the at least one blocking device for fixing the film feed device can also be integrated into the device frame itself.

To further develop the packaging device according to the invention may further be provided that the locking device has at least one latching mechanism by which the film feeding device is held in the corresponding position (operating position) and by a vertical movement of the overdrawing device upon contact of the overdrawing device with the film feeding device for moving the film feeding device is triggerable. In other words, the already present in generic packaging devices, vertically movable coating device can be moved upwards against the film feeding device or against the latter receiving the movable frame and triggers the locking mechanism on contact, so that then a vertical movement of the film feeding device is possible. The latter is thus designed purely passive in an embodiment of the subject invention with respect to the vertical movement, i. does not have its own drive means in a cost-effective manner. Alternatively, however, appropriate motor means for independently vertical movement of the film feeding device may be provided, whereby it is independent of the coating device, which gives corresponding time advantages in the vertical process.

In another embodiment of the packaging device according to the invention may be provided for the film feeding device, a plurality of different operating positions along the vertical frame of the packaging device. In each case, at least one locking device for fixing the film feeding device in this position and / or at least one locking mechanism described above is accordingly provided in each of these operating positions. The various locking devices or latching mechanisms are in each case at different altitudes or height levels within the device frame.

Such a configuration of the packaging device according to the invention makes it possible, in particular, for palletized articles to be packed with a low stacking height to the film feed device as well as the overdrawing only slightly over an object to be packaged in the appropriate height suitable operating position to lock or fix to minimize the operating path of the overdrawing, which at each packaging operation between the respective operating position of the film feeding device and its lowest position on the lower end of the article to be packaged. In the above-described embodiment of the packaging device according to the invention, therefore, the coating device retains only a minimum necessary operating path, which substantially corresponds to the height of the object to be packaged. This results in the particular advantage of a considerable increase in the cycle times of the packaging device according to the invention, since the operating path of the coating device of the height of an object to be packaged can be adapted substantially exactly and thus the overdrawing device does not always have to move to a highest operating position to the film hood of the film feeding device to take over. Performance and throughput of the packaging device according to the invention can thus be substantially increased while reducing wear and costs.

A further advantageous embodiment of the packaging device according to the invention provides to make the upper part of the frame removable. This is made possible by the fact that, according to the invention, both the covering device and the film feeding device can be moved vertically into a lower region of the frame. In this way, after removing the Gestelloberteils example, during transport of the device requires a smaller storage space. Furthermore, such a configuration allows better access to the vertically movable components of the packaging device during maintenance activities, in particular on the film feed device and on the overdrawing device. In addition, the assembly of said vertically movable components is facilitated. These can be conveniently mounted "on the ground" and can then be moved after placing the upper part in their respective operating positions.

The above-described fixing and triggering sequences of the vertically movable film feeding device are only by the provision of a Rastme- invention Mechanism, which is provided for controllable fixing of the film feeding device, allows or substantially facilitates.

In order to achieve that the latching mechanism is by default in an activated position or operating position, may be provided in the course of a first development that the toggle lever of the locking mechanism according to the invention is biased towards the film feeding device, including, for example, spring means, hydraulic means or pneumatic means for Use can come.

In order to release the film feeding device - as already mentioned - by contacting by means of the overdrawing device from below from a fixed position, provides another development of the locking mechanism according to the invention that the toggle lever in the region of its remote from the first pivot axis free end via a contact element a pivot lever cooperates, which is pivotable about a second pivot axis parallel to the first pivot axis, so pivoting of the pivot lever is caused by pivoting of the toggle lever, and that the pivot lever has a recess which is formed such that upon vertical upward movement of the film feed device via the detent position engages the contact element of the toggle lever in the recess and is caused by the pivot lever blocking the toggle lever in a maximum pivoted position, in which a free vertical movement of the film feed device is possible. After blocking the toggle lever thus undisturbed passage of the locking mechanism in the vertical downward direction by means of the film feeding device is possible.

In order to effect a renewed activation thereof after a sufficient downward movement of the film feeding device out of the securing region of the locking mechanism, another development of the locking mechanism according to the invention provides that the pivot lever in the maximum pivoted position of the toggle lever one of the film feed device facing supernatant with respect to the second pivot axis has, so that upon downward movement of the film feeding device beyond the locking position by the locking projection in contact with the supernatant of Pivoting lever pivoting of the pivot lever connected to a release of the toggle lever from the recess on the pivot lever is effected.

The mentioned embodiments of the latching mechanism according to the invention are therefore designed such that they are undisturbed by the film feed device both in the upward and in the downward direction, i. can be passed through without permanent fixation of the same. However, in order to minimize wear, a further embodiment of the locking mechanism according to the invention provides that at least a portion of the locking mechanism is horizontally movable with respect to the film feeding device between a first, inner operating position and a second, outer standby position, wherein in the second position vertical movement of the film feed device no interaction between the locking projection and the toggle lever and / or the pivot lever occurs. Due to the fact that a latching mechanism located in its standby position does not interact mechanically with the film feed device at all, this results in significantly less wear.

Further advantages and features of the present invention will become apparent from the following description of exemplary embodiments with reference to the drawing. Show it:

Fig. 1 is an overall perspective view of a packaging device according to the invention;

FIG. 2 shows an overall perspective view of a packaging device according to the invention with a film feed device in a first operating position; FIG.

FIG. 3 shows the packaging device from FIG. 2 with a film feed device in a second operating position; FIG.

FIG. 4 shows the packaging device from FIG. 2 and FIG. 3 with overhanging device moved in contact with the film feed device;

5 shows the Verpackungsvoπϊchtung of Figure 2 to 4 with the Überzieheinrichtung vertically downwardly moving film feeding device.

FIG. 6 shows the packaging device from FIGS. 2 to 5 with a lowered film feed device; 7 shows a further embodiment of the packaging device according to the invention with removable upper frame part;

8a is a cross-sectional view of a locking mechanism according to the invention in its operating position;

FIG. 8b shows a cross-sectional view of the packaging device according to the invention for locating the latching mechanism of FIG. 8a; FIG.

9-19 further cross-sectional views of FIG. 8a for explaining an operation of the locking mechanism according to the invention.

1 shows an overall perspective view of a packaging device 1 according to the invention for packaging goods, in particular goods stacked on pallets or the like (not shown). According to the generic type, the illustrated packaging device 1 is designed for packaging goods with a tubular film. For this purpose, the packaging device 1 initially has a film supply 2 in the form of a rolled, tubular film 3. For producing and supplying a hood-like film envelope (not shown) for packaging said goods, the packaging apparatus 1 comprises a film feeding device 4 known per se, which has a welding and cutting arrangement (not shown separately) for cutting and wrapping the film tube in a generic manner. 1, the film feeding device together with the welding and cutting arrangement (hereinafter referred to in short as "film feeding device") is arranged in a frame 5 within a frame 6. Below the film feeding device 4 is located within the frame 6 one per se The covering device 7 is movable up and down in the direction of the vertical double arrow V within the frame 6. Furthermore, a control cabinet 8 is shown.

As is known to those skilled in the art, during operation of the illustrated packaging device 1, first a tubular film section is removed from the film supply 2 by the film feed device 4, welded by the welding and cutting arrangement on one side to form a hood-like film casing and cut off above the weld seam. The film sleeve produced in this way is then grasped and opened by means of the over-pulling device 7, which is moved upwards within the frame 6, and downwards over the in Fig. 1 drawn packaging goods, not shown. This is subsequently transported out of the inner space of the frame 6, for example by means of a transport device 9 shown in FIGS. 2 to 7 below.

FIGS. 2 and 3 each show overall perspective views of a packaging device substantially corresponding to the packaging device 1 of FIG. Notwithstanding the illustration in FIG. 1, in each case a transport device 9 in the form of a roller transport unit for supplying or transporting goods is additionally shown both in FIG. 2 and in FIG. 3. In addition, in Fig. 2, the overdrawing device 7 is shown in a relation to the illustration in Fig. 1 elevated position, whereas it is shown in Fig. 3 in a further, lower position. In accordance with the movability of the covering device 7 in the direction of the double arrow V (FIG. 1), further positions of the covering device 7 can be realized.

1 to 3 show a packaging device 1 according to the invention, in which the film feeding device 4 and corresponding to the frame 5 are in an (upper) operating position, as required, for example, when packing relatively high stacked goods. However, in order to have easy access to the film feed device 4, for example, for maintenance or repair work, it is vertically movable within the frame 6 into a lower maintenance position in the direction of the arrow V (FIG. 1), which will be described below with reference to FIG to 7 is explained in more detail. Conversely, the film feeding device 4 according to the invention then in the direction of the arrow V "(Fig. 1) again in the illustrated (upper) operating position movable.

According to the invention, further (lower) operating positions can be provided for the vertically movable film feeding device in addition to the illustrated (upper) operating position, which are respectively adapted to the height of the goods to be packaged or to an additional operational distance to the overdrawing device 7. As will be explained in more detail below with reference to FIGS. 8 to 19, according to the invention for the movable film feeding device 4 or the movable frame 5 accommodating these in each operating position on the frame 6 at least one locking device for fixing the film feeding device 4 or the frame 5 in provided the appropriate operating position. According to the invention, this locking device can be automatically or remotely released or locked, so as to fix the film feeding device 7 in an operating position or to proceed from such.

4 and 5 show an embodiment of the packaging device 1 according to the invention analogous to the representation of FIGS. 2 and 3. As shown, the film feeding device 4 together with the frame 5 in the illustrated embodiment is only passively movable in the vertical direction within the frame 6, i. the film feeding device 4 does not require its own motor means for a vertical up and down movement. Rather, the film feed device 4 or the frame 5 is transported by the already in the vertical direction up and down movable overdrawing device 7, which has suitable drive means. For this purpose, the coating device 7 moves, as shown in FIG. 4, from below against the film feeding device 4, frees it from its (upper) operating position and then travels downwards together with the film feeding device 4 in a kind of "piggybacking" process vertically within the frame 6 in the direction of the already mentioned maintenance position, as shown in FIG.

According to embodiments of the packaging device according to the invention, it is provided that the locking device, not shown in FIGS. 1 to 5, for fixing the film feed device 4 in the (upper) operating position has a detent mechanism (cf. FIGS. 8a and 9-19) to be explained in detail , by which the film feeding device 4 is held on the one hand in a corresponding operating position and on the other hand by the already mentioned vertical movement of the coating device 7 in contact with the film feeding device 4 for moving the same - as shown in Fig. 5 - can be triggered.

FIG. 6 shows the film feeding device 4 together with the frame 5 in the lower maintenance position, in which it is used, for example, for operating personnel of the packaging according to the invention. In this position, a latching mechanism of the type still to be described can be provided for fixing the film feeding device 4 in the maintenance position, Alternatively, a stop or the like can be easily attached to the frame 6. be present for fixing the film feeding device 4 in the maintenance position.

As an alternative to the above-described embodiment of the packaging device according to the invention, however, the provision of a suitable motor means in operative connection with the film feeding device 4 is also possible in order to be able to independently move the film feeding device 4 vertically in the frame 6 independently of the coating device 7.

FIG. 7 shows a further advantageous embodiment of the packaging device 1 according to the invention. In this case, the frame 6 is designed in at least two parts and accordingly has a frame base 6 'and a frame top 6 ", wherein the frame top 6" can be removed from the frame base 6'. In addition to a smaller storage space during the transport of the device, such a design also allows a further facilitated access during maintenance activities, i. in particular when the film feeding device 4 is in the lower maintenance position shown. It also facilitates the assembly of the vertical moving components of the device, in particular the film feeding device 4 with welding and Scheidanordnung and the overdrawing device 7, which can be conveniently mounted in the embodiment of FIG. 7 "on the ground" and then after placing the Gestelloberteils. 6 "are moved to the frame base 6 'in their respective operating positions.

The following figures serve to explain the locking device or a latching mechanism, which is provided in the course of the above-described embodiments of the packaging device according to the invention for controllably fixing the film feeding device. In particular, in each operating position of the film feeding device 4, at least one such blocking device or such a latching mechanism is required at a corresponding height level. FIG. 8 a shows a cross-sectional view of a latching mechanism 10 according to the invention for vertically fixing a film feed device 4 with welding and cutting arrangement which is vertically movable within the frame 6 (FIGS. 1 to 7).

FIG. 8b also illustrates the exact arrangement of the latching mechanism according to the exemplary embodiment illustrated in FIG. As shown in FIG. 8b, it is arranged in particular at reference numeral 10 within the area A marked with a square.

The latching mechanism 10 according to the invention shown in FIG. 8a generally consists of a part 10a arranged on the frame 6 (FIG. 8b) and a part 1ob to be calculated with respect to the film feed device 4 or the frame 5. In other words, part 10b of the latching mechanism 10 according to the invention may be either a part of the film feeding device 4 or an additional frame 5 surrounding it, the presence of such a frame - as already mentioned - not being a necessary feature of the present invention. The film feeding device 4 can thus be moved either directly as such or within a frame 5 within the frame 6 of the packaging device 1. In the course of the present embodiment of the subject invention, it is assumed by way of example that the part 1 Ob is a profile element forming one side of the frame 5.

Part 10a of the latching mechanism 10 according to the invention is arranged on the frame 6 of the packaging device 1 according to the invention (FIG. 8b) and fixed relative to the frame 6 at least in an operating position of the latching mechanism 10. For this purpose, the latching mechanism 10, a fastener 11 which is horizontally movable in a particular embodiment of the locking mechanism 10 in the direction of the double arrow H between the operating position shown in Fig. 8A and a standby position indicated by dashed lines, which will be discussed in more detail below ,

At B, a toggle lever 12 is pivotally connected to a non-visible, perpendicular to the plane extending pivot axis of the fastener 11 at B. The knee lever 12 has a substantially straight first portion or legs 12a and an obtuse-angled second portion or legs 12b. The toggle lever 12 is articulated with its first portion 12a pivotally in the fastening means 11, as already stated. At the inner side facing the part 1, the toggle lever 12 has a thickening 12c in the area of the first section 12a, wherein ramps 12d, 12e rising in edge regions of the thickening are respectively formed in the direction of the thickening 12c so that the thickening 12c is trapezoidal in cross section is. In the region of the thickening 12 c, a latching recess 12 f is formed in the toggle lever 12.

The entire knee lever 12 is arranged on the frame 6 of the packaging device 1 (FIG. 8b) or on the fastening element 11 such that its knee, i. the apex of the angled portion 12b is exposed to the outside, i. to the side facing away from the part 10b of the locking mechanism 10 side shows. At the free end of the toggle lever 12, i. At the free end of the second portion 12b, a contact element 12g is provided in the form of a bolt extending perpendicularly to the sheet plane and into it.

About the contact element 12g of the toggle lever with a further provided within part 10a of the locking mechanism 10 pivot lever 13 cooperates. The pivot lever 13 is hinged at C about a parallel to the pivot axis of the toggle lever 12 extending pivot axis 14 pivotally mounted on the fastening element 11. The fastening element 11 and / or the toggle lever 12 in its second portion 12b are formed such that the toggle lever 12 engages over the pivot lever 13 with its second portion 12b in the manner shown and via the contact element 12g with an inner or bottom 13a of the pivot lever 13 cooperates. At its first end 13b, the pivoting lever 13 has a curved, hook-like projection 13c, through which a U-shaped recess 13d which opens toward the inside 13a of the pivoting lever 13 is provided. At its second end 13e, the pivoting lever 13 has a projection 13f with respect to its pivot axis 14.

In the illustration of Fig. 8a is both the toggle lever 12 and the pivot lever 13 in its initial or normal position, in which he basically due to the pivotal mounting on the fastener 11 alone due to its respective Weight passes under the action of gravity. In addition, however, suitable (not shown here) biasing means may be present in particular on the toggle lever 12, which ensure that the toggle lever 12 by default in the position shown in Fig. 8a with a substantially vertical course, ie alignment parallel to the frame 6 of Packaging device 1 (Fig. 8b) is located. The aforementioned biasing means may be, in particular, spring means, however, hydraulic or pneumatic means may be used to bias the bellcrank.

To actuate the latching mechanism 10 is attached to the part 10b, i. either on the film feed device 4 or the frame 5 of the packaging device 1 according to FIG. 8b, a locking projection 15 is provided, which has a ramp 15a on its upper side and for actuating the locking mechanism 10 in various ways with respective ends of the toggle lever 12 and des Swing lever 13 cooperates when part 10b in the direction of arrows V and V 'is moved vertically downwards or upwards, ie for raising or lowering the film feeding device 4 in a packaging device according to the invention, as already explained above. This is shown below with reference to FIGS. 9 to 19 in detail.

Fig. 9 shows how the locking projection 15 with its ramp 15a during upward movement V of the part 10b, the complementarily formed ramp 12e of the toggle lever 12 contacts, whereby a pivoting movement S of the bell crank 12 is triggered in the counterclockwise direction. In other words, the toggle lever 12 pivots outwardly until the locking projection 15 engages in the recess 12f of the bell crank 12 with continued vertical upward movement V "of the part 10b. This state is shown in FIG.

As is also apparent from FIG. 9, pivoting lever 13 is also pivoted counterclockwise about its axis 14 outward by pivoting S of toggle lever 12 via bolt 12g bearing against underside 13a of pivot lever 13 (arrow S 'in FIG Fig. 9).

As already mentioned, in this case the ramps 12e and 15a slide on one another, with the toggle lever 12 pivoting outwards to such an extent that the latching projection 15 of the part 10b Finally, it slides on the ramp 12e of the toggle lever 12 and finally engages in the catch recess 12f of the toggle lever 12 (FIG. 10).

In this respect, as shown in Fig. 10, a detent position or detent position of the detent mechanism 10 according to the invention is achieved, and the part 10b, i. The film feed device 4 or the frame 5 of a packaging device 1 according to the invention (FIG. 8b) is latched in a specific operating position via the latching projection 15 and fixed in relation to a vertical downward movement, so that the method used for moving the film feed device 4 is used in accordance with one embodiment of the present invention Covering device 7 (Fig. 8b) can also be moved into their corresponding operating position (s).

As further shown in Fig. 10, the toggle lever 12 and the pivot lever 13 are returned by the mentioned biasing means back into their respective starting position corresponding to Fig. 8a.

In order to release the locking mechanism according to the invention, the covering device 7 is again guided from below to the film feeding device 4 or the frame 5 (FIG. 8b) until it contacts the latter and moves it further upwards in the vertical direction, as in FIG. 11 shown. In this case, the ramp 15a of the latching projection 15 on the part 10b touches an upper edge 12h of the latching recess 12f of the toggle lever 12, wherein the edge 12h in turn slides on the ramp 15a, causing a renewed pivoting movement S of the bell crank 12 in the counterclockwise direction. About the pin 12g and the pivot lever 13 is in turn pivoted clockwise (arrow S 'in Fig. 11).

As shown in Fig. 12, these pivotal movements S, S 'continue when the locking projection 15 slides on a vertically formed inner sliding surface 12i of the bell crank 12 above the edge 12h further upwards.

Is reached at the transition to the ramp 12d of the bell crank 12, the highest point of the vertical sliding surface 12i, as shown in Fig. 13, the toggle lever 12 and the pivot lever 13 have reached their respective greatest deflection to the outside. It slides on the knee lever 12th provided bolts 12g in the corresponding design formed 13d of the pivot lever 13 and engages positively in this. By this positive engagement of the toggle lever 12 is held as shown in Fig. 13 by the pivot lever 13 in its maximum deflection position. The film feed device 4 or the frame 5, ie part 1 Ob can still move a short distance further upwards (arrow V ") before the actually intended vertical downward movement V begins.

As shown in Fig. 14, moves part 10 b with its locking projection 15 in the direction of arrow V down to the maximum pivoted knee lever 12 over. Knee lever 12 and pivot lever 13 remain in their respective maximum deflected position, since the pin 12g is still received positively in the extension 13d of the pivot lever 13.

If the part 10b or its latching projection 15 has made a certain downward movement, a horizontally formed lower edge 15b of the latching projection 15 contacts the projection 13f at the end 13e of the pivoting lever 13. This is shown in FIG.

As shown in FIG. 16, the above-described contact between horizontally formed lower edge 15b of the latching projection 15 and projection 13f of the pivoting lever 13 triggers a further pivoting movement S 'of the pivoting lever 13 in the counterclockwise direction, whereby, after a corresponding deflection, the bolt 12g leaves the recess 13d of the pivoting lever 13 also slides, so that the toggle lever 12 due to its own weight and / or due to the aforementioned bias in the direction of the arrow R back to its original position (see. Fig. 8a) pivots back.

As shown in Fig. 17, part 10b moves further down in the vertical direction V, with the swinging movement S 'of the swing lever 13 continuing in the clockwise direction. The pivoting movement S 'of the pivot lever 13 ends when the latching projection 15 loses contact with the projection 13f at the end 13e of the pivoting lever 13.

As soon as this happens, the pivot lever 13 is released as shown in FIG. 18 and oscillates by its own weight clockwise back to its starting position shown in FIG. 8a back (arrow R 'in Fig. 18). Part 10b has thus completely lost contact with the locking mechanism 10 and is moved away downwards.

This is shown again explicitly in FIG. 19. The respective positions of the toggle lever 12 and the pivot lever 13 again correspond to the starting positions according to FIG. 8 a, and the latching mechanism 10 is reactivated.

The horizontal method H of the latching mechanism 10 described above with reference to Figure 8a, i. the fastening element 11 together with the toggle lever 12 and the pivoting lever 13 and possibly biasing means in a so-called standby position is intended to contribute to driving through the frame 6 (FIG. 8b) between at least one (upper) operating position and a lower maintenance position by means of the film feeding device 4 is possible without interference. This may be of particular interest if between the two positions described above, further locking positions with corresponding locking mechanisms for the film feeding device 4 and the frame 5 are provided. The above description, however, shows that such a horizontal method H of the latching mechanism to a standby position is not absolutely necessary, since the latching mechanism 10 can be traversed vertically in both directions when no latching is desired. However, since such a driving through of the latching mechanism 10 in its operating position is associated with a certain wear of the latching projection 15, the described horizontal method of the latching mechanism between its operating position and its standby position (see Fig. 8a) may prove advantageous.

As already mentioned, in an advantageous embodiment of the packaging device 1 according to the invention is achieved by providing corresponding locking mechanisms 10 at different altitudes on the frame 6, that a locking of the film feeding device 4 with welding and cutting arrangement in a desired height is possible.

Of course, it is possible in all embodiments of the present invention, the entire movement of the locking mechanism 10 between its operating position and its remote control standby position. In this case, the method of the locking mechanism itself can in turn be realized by spring means, hydraulic means or pneumatic means or alternatively by the use of electric motors.

Claims

claims

1. A packaging device (1) for packaging goods, in particular stacked goods on pallets or the like., With a tubular film, wherein for producing and supplying a hood-like film envelope within a frame, a film feeding device (4) is provided with welding and cutting assembly cooperating with a covering device (7) which moves vertically upwards and downwards within the frame (6) and which is designed to grip the film envelope and cover it over the goods arranged in a lower region of the frame (6), characterized in that the film feed device (4) is arranged vertically movable within the frame (6).

2. Packaging device (1) according to claim 1, characterized in that the film feeding device (4) in a frame within the frame (6) vertically movable frame (5) is arranged.

3. Packaging device (1) according to claim 1 or 2, characterized in that the film feed device (4) between at least one upper operating position and a lower maintenance position is movable.

4. Packaging device (1) according to any one of claims 1-3, characterized in that for the film feeding device (4) on the frame (6) at least one locking device for fixing the film feeding device is provided in a corresponding position.

5. Packaging device (1) according to claim 4, characterized in that the locking device has at least one latching mechanism (10) by which the film feeding device (4) is held in the corresponding position and by moving the coating device (7) vertically upon contact of the coating device (7) with the film feeding device (4) for moving the film feeding device (4) Foil feed device (4) can be triggered.

6. latching mechanism (10) for vertically fixing a within a frame (6) vertically movable film feed device (4) with welding and cutting assembly, in particular for a packaging device (1) according to one of the preceding claims, characterized by a toggle lever (12) about a transverse to the vertical direction of movement (V, V ") of the film feeding device (4) arranged first pivot axis is pivotally and the one of the film feed device (4) facing inner recess (12f), wherein a ramp portion (12e) of the toggle lever (12) in such a way is formed complementary to a latching projection (15) on the film feeding device (4) that in vertical upward movement (V) of the film feeding device (4) pivoting of the toggle lever (12) is effected to the outside until the latching projection (15) for fixing the film feeding device (4) against a downward movement (V ") in a detent position in the latching recess (12f) eingre ift.

7. latching mechanism (10) according to claim 6, characterized in that the toggle lever (12) is biased in the direction of the film feed device (4).

8. latching mechanism (10) according to claim 6 or 7, characterized in that the toggle lever (12) in the region of its remote from the first pivot axis free end via a contact element (12g) with a pivot lever (13) cooperates, which is one to the first pivot axis parallel second pivot axis (14) is pivotable, so that by a pivoting of the toggle lever (12) a Ver¬ pivoting of the pivoting lever (13) is effected, and that the pivoting lever (13) has a recess (13d) which is formed such that upon vertical upward movement (V) of the film feeding device (4) beyond the locking position, the contact element (12e) of Knee lever (12) engages in the recess (13d) and is caused by the pivot lever (13) blocking the toggle lever (12) in a maximum pivoted position in which a free vertical movement (V, V ") of the film feeding device (4) is possible.

9. latching mechanism (10) according to claim 8, characterized in that the pivot lever (13) in the maximum pivoted position of the toggle lever (12) one of the film feed device (4) facing the supernatant (13f) with respect to the second pivot axis (14), so at Downward movement (V ") of the film feed device (4) beyond the detent position by the detent projection (15) upon contact with the supernatant (13f) of the pivot lever (13) pivoting of the pivot lever (13) connected to a release of the toggle lever (12) the recess (13d) on the pivot lever (13) is effected.

10. latching mechanism (10) according to any one of claims 6 to 9, characterized in that at least a part (10 a) of the latching mechanism (10) with respect to the film feed device (4) between a first, inner operating position and a second, outer standby Position is horizontally movable, wherein in the second position during vertical movement of the film feeding device (4) no interaction between the locking projection (15) and the toggle lever (12) and / or the pivot lever (13) occurs.

11. A method for operating a packaging device (1) according to any one of claims 1 to 5, in particular using the latching mechanism (10) according to one of claims 6 to 10, characterized in that for packaging of goods, the film feed device (4) is moved within the frame (6) in an upper operating position and fixed therein, and that for access to the Folienvorschubeinrichrung (4) this is moved within the frame (6) in a lowered position ,

12. The method according to claim 11, characterized in that the Folienvorschubeinrichrung (4) by vertical method (V) of the overdrawing device (7) is moved.