JPH03124509A - Method and device to pack object with plastic film - Google Patents

Abstract

PURPOSE: To constantly guarantee the necessary stability to a packing belt by providing a heating means to keep the temperature of a film section necessary for the packing at the prescribed level which is convenient for the treatment according to the nature of a film. CONSTITUTION: A tubular film 6 coiled around a storage roll 9 is used for a packing material, and supplied through a direction-changing element of a bracket 11. The film tube is diagonally cut in the bracket 11, or welded as necessary. A hot air supplier 8 is arranged in a supply means 7, the passing film is heated in a relatively film manner, the film section is heated on the whole at the desired temperature level with the hot air supplied to upper and lower surfaces of the film, and kept at the temperature level. Brackets 12, 13 are provided on a frame structural body 2, and the brackets 12, 13 are moved in the direction of the arrow B in each direction. Each bracket has two suction cases, and a direction-changeable finger element 14 is held in the suction case. Hot air suppliers 10a, 10b are provided below the brackets 12, 13, and hot air is blown into the film tube.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method and apparatus for packaging objects with strip-shaped or tube-shaped plastic films, and in particular to a method and apparatus for packaging objects stacked on pallets. , relates to a method of packaging in which an element reaching inside the film section required for packaging is packaged by means of a suitable device configured to open the mouth of the film tube and pull it over the object to be packed [conventionally]. A device suitable for the purpose of packaging objects with plastic film is known, for example, from DE-O 3 3 7 0 7 877. This device essentially consists of a horizontal frame structure whose inner cross-section is larger than the maximum cross-section of the object to be packaged and which moves vertically on a stand, and a strip or tube-shaped plastic film that is attached to the frame structure from a film storage roll. and two mutually opposing brackets mounted on a frame structure, facing each other and movable apart from each other. For each bracket, first
Extrusion for extruding a finger element extending into the interior of the tubular plastic film and, furthermore, a tubular plastic film on the finger element, with the length of its longitudinal section being selectable in advance. equipment is provided. To package the object, an extrusion device extrudes selected longitudinal sections onto the finger elements. The movement of the separate brackets pulls out the plastic film, and the downward movement of the horizontal frame structure brings it over at least the sides of the object. Practical withdrawal rates for purposes are approximately 20% to 30%, but withdrawals of up to 50% are also possible. Since the selected film section is completely separated from the finger elements at the downwardly moving end of the horizontal frame structure, this device has the advantage of providing the vertical stretch of the film that is often desired to increase packaging stability. The disadvantage is that it cannot be done.

The strength required for packaging is determined by the inherent tensile strength of the plastic material at normal environmental temperatures. This tensile strength has been shown to vary depending on the environmental temperature.

Since this device for packaging objects is primarily used in indoor baggage storage areas where the ambient temperature is suitable for stored loads, this device has similar requirements for packaging stability in any given location of use. The disadvantage is that it cannot satisfy the requests and requirements.

A further problem is that, in addition to the above, the finger elements are made to have a rounded shape for the purpose of maintaining a certain strength of the film at the edge portions where the finger elements intervene. It is therefore possible that during horizontal stretching, the lifted film has already slipped off the finger elements.

In the hitherto known method, the section of film tube required for packaging is furthermore lifted by 100% by the finger elements in order to ensure that the part of the film section that is not horizontally expanded remains on top of the finger elements. It became impossible for me to get caught. This portion of the film section that was not expanded horizontally served as a support for vertical stretching during the covering of the film over the packaged object.

At that time, the unpacked portion remained on the top surface of the packed object. The protrusion remaining on the upper side spoiled the appearance of the packaged object and also provided a surface for wind protection. When stacking packed objects, it is therefore almost impossible to avoid scratches on the surface by the fork tips of the forklift. Furthermore, existing storage space cannot be utilized in the most efficient manner.

To address this problem, it has been proposed to weld the film sections required for packaging before or after cutting or otherwise treat as described above. In each case, the unstretched and undefined film section necessarily remains on the upper surface of the packaged object. Furthermore, it has been found that fissures often form because they are easy to move and are often damaged.

In both of these cases, the results of the film sections not being stretched horizontally also ensure that the packing strip loosens over time or guarantees the stability of the packing strip in terms of keeping the object uniform. I couldn't. Furthermore, it has not been possible to maintain a uniform appearance of the packaged piles, which is important, for example, when the package units are unloaded and placed at sales points, trade fairs, etc. Moreover, the above method of using the film is also uneconomical.

The object of the invention is to provide a method and a device for packaging objects with plastic films in the form of strips or sheaths of the nature described above, which always have the required stability, regardless of the nature of the film used and the configuration of the device. is guaranteed on the packaging band, and
The object is to improve the appearance of the packaged unit so that no damage occurs while the film section is in an undefined state and the appearance of the packaged unit remains unchanged.

This purpose is achieved in claim 1.25.35.40.41.43.
．． 46 or 47.

According to a first aspect of the invention, heating means are provided which are devised to keep the temperature of the film section required for packaging at a constant level suitable for processing, depending on the nature of the film. In an advantageous embodiment of the invention, the heating means, at the means for transferring the film from its storage roller to the frame structure, heat the corresponding film section uniformly over its entirety, thereby preheating the film. It is arranged to be sent to the frame structure.

As heating means for achieving and maintaining a constant temperature level, hot air blowers and heat radiation devices, in particular infrared radiation devices, are proposed.

According to another embodiment of the invention, the heating means for achieving and maintaining a constant temperature are also arranged on the frame structure or the bracket, or more often at the same time, and are of different types. Use a combination of heating means. These are in each case arranged in such a way that the film strip or sheath is heated uniformly over its entire surface.

If a hot air blower is used, it is particularly advantageous to arrange it in such a way that the air flow flows in the same direction, parallel to the direction of film movement. In this way, relatively hot air comes into contact with the unheated film at the outlet of the hot air blower, reducing the temperature of the air along the flow direction and correspondingly increasing the temperature of the film. Therefore, the required film temperature is obtained over the entire area of the frame structure just before stretching takes place. In order to prevent heat loss, the device may be entirely or partially isolated from the surrounding cold environment at least in the area of expansion, ie the area to be packed. In order to save energy, the blower is also equipped with an air circulation system in which the still warm exhaust air is returned to the blower or reheated around the packaging area.

For adjusting the required temperature level and controlling the heating means, switches arranged on the switch panel are provided. Adjustment of the temperature level is carried out by means of self-explanatory and appropriately placed regulators.

Since the ideal processing temperature of the film used at any given time may be lower than ambient temperature, it is natural to use cooling means instead of heating means, e.g. cold air blowers instead of hot air blowers. It can also be equipped.

Depending on the required properties of the film and the location of the equipment, the film can be preheated either during the tensioning process, either before tensioning has taken place or after the tensioning process has ended. There are times when it is appropriate to do so.

According to another embodiment of the invention, the warm air is supplied from the inside.
Air is blown into the film section lifted by the finger elements.

To this end, a method is proposed in which holes are made in the finger elements through which hot air is guided to the film.

The film, which has been preheated to the ideal processing temperature, is then easily tensioned in the vertical direction. For this purpose it is proposed to make modifications to the device depending on the structure of the finger elements. The finger element is supported in the bracket so as to be rotatable through 90° about an axis formed on it, so that it can assume a horizontal rest position and a vertical functional position. All corners are rounded, and the upper corner is shaped like a curved cylindrical hanger to improve upward passage of the film. The corner, on the side facing the film, is provided with a flat protrusion, which increases the friction with the film passing upwards, creating a resistance to the passage of the film in this area and automatically is pulled in a direction perpendicular to . This vertical tension ensures that the film fits tightly onto the top surface of the packaged item. This involves providing a vertical axis on the lifting device which pushes the corresponding film section onto the respective finger element, and by rotating it a respective short length of film is pushed onto the finger element, thereby pushing the film onto the finger element. By allowing it to be picked up on the element, it becomes more reliable. The geometrical combination of the axis of the push-up device and the shape of the finger elements ensures accurate withdrawal of the film from the roll. The required frictional effect in vertically pulling the film away from the finger elements is supported by allowing the axis of the lifting device to be adjusted as required.

This configuration of the finger elements allows the film to
This prevents the film from becoming thinner due to heating.

Moreover, according to a further feature of the invention, the lifting device at each finger element for picking up the film onto the finger element is provided with a movable support and a horizontal shaft for pressing it. I understand that. By rotating the shaft pressing against this support, a length of film corresponding to the rotation is picked up onto the finger elements. This has the advantage that the shaft and its associated support can be designed in such a way as to optimize the required coefficient of friction, depending on the properties of the film used in each case. According to a further advantageous embodiment of the invention, it is furthermore recommended that the support is counter-rotatable for moving the shaft. The rotatable support is thereby driven by the shaft pressing against it.

This has the advantage of greatly improving the take-up of any type of film. Additionally, there is better control over the film length to be picked up.

According to a further advantageous development of the invention, the support is an endless belt supported on the finger elements and driven by a shaft. This has the advantage, inter alia, that the film length to be picked up is fed out on its endless belt, so that unnecessary tears are prevented from occurring. Furthermore, the delivery of the film is better controlled during the tensioning process.

Another option is a second horizontally arranged shaft instead of an endless belt, or if required by the type of film to be used.

It is recommended to use one or more vertically arranged rollers. In order to optimize the frictional forces required by the type of film to be used, it is necessary that at least one of the rotatable elements, and therefore also the shaft or support, fully or partially cope with the required friction. It is recommended that the film be covered with a film.

A further special advantage of the lifting device suitable for the purposes of the invention is that the rotatable element is easy to replace, so that the packaging device is independent of the type of film to be used. There will be no more.

Below, still another method based on the basic premise of solving the above-mentioned problem and the form of the apparatus related thereto will be explained.

According to a further feature of the invention, the film sections required for the packaging are welded at an edge remote from the packaging body, so that a film hood is formed, which is gripped by gripping elements and unfolded; The result is a pouch formed by folding the film tube, which is then sealed by suitable means.

It is therefore advantageous to form the film hood in such a way that the upper surface is also completely included in the horizontal tension, so that the film does not loosen later and the stability of the packaging complex is not reduced. . Furthermore, since there is no transitional region, cleft formation is maximally suppressed.

The combination of the use of folded film tubes and the method according to the invention also prevents undefined sections of the film from remaining, which also at the same time prevents the corresponding damage to the film mentioned above. At the same time, irregularities in the appearance of the packaging unit are also avoided.

A film hood suitable for the method described above has a bag-like opening formed by folding in the side of the film tube and in the flat surface of the film hood.

In an advantageous embodiment of the invention, the film hood formed as described above is folded inwards at its corners before or during the pulling over the packaged object, so that the upper outer surface of the film hood is also folded over. It is recommended that you fold it back to the back side to create a shaped opening.

Corresponding to the method according to the invention, the remaining pouch opening must be closed by suitable means.

In one advantageous development of the invention, the film hood is then stretched out and pulled downwards at least until its inner upper surface rests against the upper surface of the packaging object.

Depending on the purpose, the bag can be sealed before or after complete stretching of the film hood.

Associated with the device for carrying out the respective method can be associated further devices for further processing the packaged objects, ie the necessary device elements can be attached to the packaging device.

In one advantageous embodiment of the invention, a welding beam, which is now expediently attached to the device, approaches the bag-like opening and welds it, so that the upper plane of the packaging object acts as a counter-support. used.

In a further advantageous embodiment of the invention, air is blown into the remaining bag-like opening, thereby keeping it open and allowing the adhesive to be injected therefrom. Subsequently, the remaining opening is glued by means of an expediently provided pressure plate, so that in this case too the upper plane of the packaging object is used as a counter-support.

Instead of blowing air into the remaining bag-like opening, in a further advantageous embodiment of the invention it is recommended to pull the top surface of the film hood upwards using a suction device, for example a vacuum device. .

Instead of injecting the adhesive, in a further advantageous embodiment of the invention, the adhesive is applied to the pouch opening with a brush impregnated with adhesive and the pouch opening is pressed in the manner described above. A method is recommended.

In a further advantageous embodiment of the invention, a method is recommended in which heated air is blown into the remaining bag-like opening, so that the film is melted with heat and then removed by means of an expediently provided pressure plate. The opening can be sealed by pressure bonding.

Furthermore, according to a further advantageous embodiment of the invention, a method is recommended in which the bag opening is sealed manually or automatically with at least one adhesive tape in each case.

In all of the last-mentioned advantageous embodiments of the invention, the upper surface of the packaging object is used as a counter-support.

In a further embodiment according to the invention, it is recommended that the film section required for packaging is first expanded and welded to an edge remote from the packaged object. After gripping the rectangular film hood formed in this way with the gripping element, an outwardly projecting triangular projection remains, which is fixed to the film hood in a suitable manner.

To do this, in an advantageous embodiment of the method according to the invention, the triangular projection is welded to the side surface of the film hood, or alternatively to the upper surface, by means of purposefully provided welding beams. Recommended.

Instead of welding using a welding beam, it is also recommended to use an adhesive as described above. In a further embodiment of the method according to the invention, the remaining triangular protrusion is
After the film hood has been drawn over the packaging object, it is welded to the edge of the horizontal upper side of the corresponding packaging assembly using a welding beam that is expediently provided in the device and is simultaneously separated. .

In a further development of the invention, a method is recommended in which the edges of the film sections required for the packaging, which are remote from the packaging object, are welded in different directions. Folding yields a total of five two-layer sections of film tube. That is, the two folded sheets and the central portion of one unfolded sheet overlap on each side. The double layers resulting from the folding are obliquely welded together at the periphery of the film hood at a suitable angle, depending on the dimensions of the film hood, and at the same time the respective edges are separated. The upper edge of the unfolded central bilayer is welded straight, thus forming a tail-shaped film hood. This film hood is lifted by the finger elements, stretched and pulled over the packaging object, so that no bag-like openings or protrusions remain.

In all preferred embodiments of the invention, the entire upper surface and the entire inner surface of the hood overlap the upper surface of the packaging object in the same way, thereby ensuring always the same necessary stability of the packaging complex.

Furthermore, no undefined film areas remain and the remaining openings and projections are correctly aligned and sealed or welded, so that damage is avoided and uniformity is achieved with respect to the appearance of the packaging unit. This ensures that the packaging deposits, for example, stack up really well, while damage to mostly flat surfaces is also excluded. Moreover, if the loading shelves are high, the space can be optimally utilized, and the tension film fits snugly over the entire surface of the packaged object, with no interfering protrusions.

Further advantageous features of the invention become apparent from the remaining dependent claims in conjunction with the following description, which explain in detail with further embodiments of the invention.

[Example 1] The packaging device shown in FIGS. 1 and 2 has a frame structure 2, which is supported vertically movably by a stand 1, as indicated by the double-headed arrow A. ing. Beneath the opening of the frame structure, packed and stacked packing objects 3 are placed, which are placed on a pallet 4. The pallet 4 is packed together with the packing object 3. The packing object 3 is adapted to be positioned under the frame structure opening by means of a transport means 5 and is transported further through this transport means 5 after complete packaging. In order to support the packaging object 3 and the pallet 4 together with the packaging material from below, the transport means 5 is of elongated design. Furthermore, in order to position the pallet 4 at the required height as indicated by the double-headed arrow C, a lifting device is provided, although not shown.

Packing material is temporarily inserted between the transport means 5 and the pallet 4 of the packed objects 3 in order to improve the sturdiness of the packaging. As packaging material, a tubular film 6 is used, which is wound on a storage roll 9, which is attached to a horizontal frame structure 2 and a forwardly projecting bracket 11, which is fixed to the upper end of the stand 1. It is fed through diversion elements such as slide guides and rollers.

The tubular film 6 is folded so that on each side there is one inwardly rolled edge and two outwardly exposed corners.

Other guide means and means for diagonally cutting or, if necessary, welding the film tube in the bracket 11, are not shown.

A hot air blower 8 is disposed in the upper supply means 7. The film passing by the blower is heated relatively strongly in the vicinity of the blower and cools down by the time it reaches the front end of the reinforcing means 7. By means of warm air evenly distributed in the supply means and acting on the top and bottom surfaces of the film, the film section is heated to and maintained at the desired temperature level as a whole.

The frame structure 2 is provided with two opposing brackets 12,13 parallel to the frame structure components.

Both brackets 12,13 are movable relative to each other in the direction indicated by double arrow B. Each of these brackets has two intake cases (not shown) that include an aspirator (not shown in detail). Each of the intake casings carries a redirectable finger element 14, which moves from a horizontal, unused state, indicated by its free end inside the frame structure opening, to a functional state, directed vertically upwards. It is now possible to change direction. Below the plane of the finger element, the bracket 12.13
Hot air blowers 10a and 10b are provided below the
They blow warm air into the film tube. By providing a hot air blower in this way, the vertical stretching of the film is also facilitated in a unique way. Control panel 2
0 is equipped with a switch and a regulator to control the air blowing at any given time.

In FIG. 2, infrared irradiators 8a and 8 are shown above and below the film tube to be supplied over the length of the supply means 7.
n is provided to heat and hold the film sections required for the packaging process to the required temperature.

FIG. 3 shows a particular configuration of a finger element according to the invention. The finger elements are rotatable about the axis 16.degree. 17 from a horizontal standby state to a vertical functional state. Approximately in the middle of the finger element 14, on the side facing the film, a flat projection 18 is provided. Further, there is a cylindrical hanger 15 at the upper end.

Due to this special configuration, the film section picked up by the flat projection 18 is pulled up tighter due to the vertical downward movement of the frame structure and the passage of the film over the rounded hanger 15. This ensures that vertical stretching is possible.

In FIG. 4, the axis 19 of the displacement device is shown attached to the finger element 14, the same axis being adjusted in a known manner so as to adjust the effect of friction on pulling down the film. , which facilitates vertical stretching of the film.

FIG. 5 shows a special configuration of the finger element according to the invention. The finger element can be rotated in the bracket by 90 DEG about the axis 16,17 from a horizontal standby state to a vertical functional state. All edges are rounded, and the upper edge is shaped like a curved cylindrical hanger to improve upward film feeding. On its side facing the film, a base 18 is provided, which increases the friction with the upwardly advancing film, so that the film travels tighter in this area, and the vertical direction Stretching is obtained. Vertical stretching ensures that the film is tightly stretched on the top surface of the packaged object. This is also facilitated by the fact that, for displacing the corresponding film section, the displacing device has an axis 19 on each finger element, which axis through its rotation covers a short length of the film. onto the finger element, whereby the film is picked up by the finger element. Shaft 1 of shifting device
9 and the geometrical combination of the shape of the finger elements 14 ensure accurate rewinding of the film.

The desired frictional influence on the vertical withdrawal of the film from the finger elements is achieved by allowing the axis 19 of the shearing device to be adjusted accordingly.

By rounding the shape of the finger elements 14, the film becomes thinner at the edge portions gripped by the finger elements, but this is easily suppressed even when the film is heated using conventional heating methods.

This ensures that the portion of the film picked up by the flat projection 18 is pulled down more tightly by the vertical downward movement of the frame structure as the film advances over the rounded hanger 15, so that the vertical Stretching in this direction becomes possible.

In the embodiment shown above, the base 18 is formed as an endless belt held by finger elements. This endless belt is driven by a shaft 19,
At that time, it is made to run opposite to the movement of the shaft. The film which has been displaced beyond the hanger 15 to the finger elements is fed downwards by the endless belt and then between the vertical axis and the endless belt.

Through this process, the film is picked up accordingly.

In FIG. 6, the shaft 19 perpendicular to the endless belt 18 is shown viewed from above, and it can be seen that the endless belt 18 is narrower than the shaft 19. This ensures that the film is not torn by the sharp edges of the finger elements 14.

The horizontal shaft 19 or the endless belt 18, or both, can be spaced apart depending on the desired frictional properties, so that optimal uptake of the required film sections is ensured. The length of film to be picked up is replenished by the endless belt onto the connection between the shaft and the endless belt, so that the film is not replenished unnecessarily. This can occur in a very controlled manner when feeding the film, since the force of the shaft against the oppositely rotatable base can be adjusted by known methods. Taking all of the above into consideration, with such a configuration the entire packaging device no longer depends on the properties of the film used.

FIG. 7 shows the film section 21 necessary for packaging, which is folded inward on both sides 26, 27, the edges remote from the packaging object being welded together. The film hoods 21 formed in this way are folded together in order to pack the packaged object. As shown in FIG. 8, finger elements 14a, 14b, 1
4c and 14d are for that purpose 4 of the film hood 21.
The displacement device picks up the film hood onto the finger elements. When the finger elements are opposite each other as described above, the picked up sides 26 and 27 are spread apart, thus creating bag-like openings 24 and 25 in the upper surface of the film hood.

Next, based on FIGS. 9 to 12, according to the present invention,
Different embodiments of the method of sealing the corresponding bag openings 24 and 25 will now be described.

In the embodiment shown in FIG. 9, two welding beams 28 and 29 are provided at the end on the device side. Finger element 14
The film hood 21, unfolded at a, 14b, 14c and 14d, is carried downwards until its inner upper surface reaches the outer upper surface of the packaged object. The welding beams 28 and 29 are then lowered to weld the bag-like openings 24 and 25 together with the surface of the packaged object as a receiving surface.

In a further embodiment according to FIG. 10, nozzles 30 and 3
1 is provided with its outlet facing towards the openings 24 and 25. The nozzles 30 and 31 are jointly adapted to direct air into the opening such that the film portions forming the opening are blown opposite each other, so that the adhesive can be applied. It can also be injected. Alternatively, hot air can be blown directly into the openings, so the film portion can be melted. In either case, the push plate 32 is subsequently lowered to press the hood surface against the surface of the packaged object, thus sealing the opening.

While blowing air, insert a brush 33, 34 impregnated with adhesive into the opening, as shown in FIG.
Can be pulled back. As before, the opening is then sealed using a pressure plate 32. In this case as well, the surface of the packaged object acts as a receiving surface.

FIG. 12 shows the film hood 21, also unfolded, but with its openings sealed with adhesive tapes 35 and 36. This is done automatically or manually depending on the method. Shorter, discrete pieces of adhesive tape can also be used for the same purpose.

As described above, when the welded seam 22 is folded back once inside the film hood 21, as shown in FIG. .

24b, 24c and 24d are as shown in FIG. These openings then appear on the outer surface of the film hood and are all sealed by the method described in FIGS. 9 to 12.

When the film tube is unfolded to form a film hood before welding, the film hood 21 assumes the shape shown in FIG. 14 with the upper weld seam 22 extending over its entire width. When this is picked up and spread out by the finger elements as already described, the upper side edges of the sides are provided with canopies 37 and 38, as shown in FIG. After lowering the film hood thus spread out until the film surface is supported on the outer upper surface of the packaged object, the canopy parts 37 and 38 are welded together using the welding beams 28 and 29. separated at the same time. Alternatively, the canopy portions 37 and 38 can also be welded to the side surfaces 26 and 27 after the welding beam 28 moves only the edge portion to weld the canopy portion.

Yet another option is for the welding beam 29 to lift the canopy from below to the top, fold it over at the upper surface as shown by arrow A, and then weld the canopy to the upper film hood. You can also do that. Instead of welding, the canopy can also be bonded using adhesive, adhesive tape, or hot air, as described in FIGS. 4 to 7.

FIG. 16 shows an embodiment of a film hood 40 made by the method according to the invention. Four double layers 41a of the folded film hood 40.

At 41b, 41c and 41d, welding beams 39a, 39b, 39c and 39d are installed, respectively, which are oriented obliquely at an angle that matches the dimensions of the film hood.
On the other hand, a horizontal welding beam 22 is provided in the unfolded center double layer. When the folded film hood 40 is picked up on the finger elements as already mentioned and pulled over the packaged object, no openings or visors appear, as shown in FIG. 17.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view of a packaging device having a heating means according to the present invention, FIG. 2 is a partially sectional side view of a packaging device having another embodiment of the heating means according to the present invention, and FIG. 4 is a schematic side view of a finger element according to the present invention, FIG. 4 is a schematic explanatory diagram of a finger element having a shifting mechanism, and FIG. 5 is a schematic side view of a finger element having a shifting mechanism according to the present invention. FIG. 6 is a schematic side view of a finger element with a shifting device in which a cross section along the line A-A of FIG. 5 is shown; FIG. 7 is a schematic side view of the finger element according to the invention; 8 shows an example of a film hood formed by the method, FIG. 8 shows a film hood taken up and unfolded with a gripping element according to the invention, and FIG. 9 shows an example of a film hood formed by the method; FIG. illustrating sealing with welded beams;
8 is a diagram of a film hood according to FIG. 8 taken up with a finger element, FIG. 10 is a further embodiment of the application of the method according to the invention, and FIG. 11 is an application of the method according to the invention FIG. 12 is a perspective view showing still another embodiment of the application of the method according to the invention, and FIG. 13 is a perspective view showing still another embodiment of the application of the method according to the invention. FIG. 14 is a perspective view of yet another embodiment of a film hood made in accordance with the present invention, with an engraving of the drawing (
[No change in content] FIG.
FIG. 7 is a perspective view showing a state in which the film hood based on FIG. 16 is covered.

Claims (1)

[Claims] 1. An apparatus for packaging objects with a belt-like or tube-like plastic film, comprising: a) a vertically movable horizontal frame structure; and b) packaging the plastic film from a storage roller to the frame. c) two horizontally movable brackets opposite each other supported on the frame structure; d) for each bracket for gripping and guiding the film; heating means (8) are provided, which adjust the temperature of the film section required for packaging depending on the properties of the film to favor its processing; 1. A device for packaging an object with a plastic film, characterized in that the device is configured to bring an object to a certain level and maintain it at that level. 2. Packaging device according to claim 1, characterized in that the heating means (8) are heat radiators, in particular infrared radiators. 3. Packing device according to claim 1, characterized in that the heating means (8) is a hot air blower. 4. The packaging apparatus according to claim 3, wherein the hot air blower is configured such that the blowing direction is parallel to and in the same direction as the film moving direction. 5. Heating means for achieving and maintaining temperature levels (8
5. Packing device according to claim 1, characterized in that the () consists of a combination of means of different types. 6. Heating means for achieving and maintaining temperature levels (8
6. Packing device according to claim 1, characterized in that the film belt (6) or the film tube (6) is configured to heat the entire surface of the film belt (6) or the film tube evenly over the entire surface. 7. Heating means for achieving and maintaining temperature levels (8
) is adapted to function using a control setting controller arranged on the control panel (20). Device. 8. Claims 1 to 7 characterized in that the heating means (8) are provided with a regulator in order to maintain the temperature level.
The packaging device according to any one of the above. 9. Heating means for achieving and maintaining temperature levels (8
) is constructed in such a way that the film required for the subsequent packaging process is not stretched when passing through the heating means. or the packaging device described in paragraph 1. 10. Heating means for achieving and maintaining the temperature level (
Packing device according to claim 1, characterized in that 8) is configured such that the film required for the next packaging step is heated during or after the stretching step. 11. Heating means for achieving and preserving temperature levels (
8) to the film required for the next packaging process, which film is taken up by the finger element (14);
The packaging device according to claim 1, wherein the packaging device is configured to blow warm air while being held and stretched by the packaging device. 12. Claims 1 to 1, characterized in that the finger element (14) is provided with a hole, through which hot air for achieving and maintaining the temperature level is directed onto the film. 11. The packaging device according to any one of Item 11. 13. The finger element (14) is characterized in that it has a roundness over its entire length so that the corner portion of the film gripped by the finger element maintains a constant strength. packaging equipment. 14, the finger element (14) has its rotation axis (1
7) with a curved cylindrical hanger (15) at the opposite end.
) from the finger element by having
14. Packing device according to claim 13, characterized in that problem-free film delivery is guaranteed. 15. Claim characterized in that the finger element (14) has a projection (18) on its side facing the film, which serves to increase the frictional effect during film delivery. The packaging device according to item 13 or 14. 16, the finger element (14) is connected to its fixed shaft (1
16. Packaging device according to claim 15, characterized in that it is rotatable about 6, 17) from a horizontal standby position into a vertical functional position. 17. Claim 17, characterized in that in the area (18) of the finger element (14) a shifting device is arranged, said device being adapted to shift the film section to be processed onto the finger element. 17. The packaging device according to any one of 1 to 16. 18. according to claim 17, characterized in that the displacement device has a vertical axis (19), by rotation of which a short film length is displaced onto the finger element (14) and taken up by it; packaging equipment. 19. The shifting device has a movable base (18) and a pressing shaft (19) opposite to the movable base, which shaft presses the base and rotates so that the short film length is shifted up to the finger element and taken up by it. The packaging device according to claim 21 or 22, characterized in that: 20. Claim 19, characterized in that the base (18) is rotatable in a direction opposite to the movement of the shaft (19) and is driven by the shaft (19).
Packing equipment described in . 21. Claim 1, characterized in that the base (18) is constituted by an endless belt rotatable in a direction opposite to the movement of the shaft (19) and driven by this shaft.
9 or 20. 22, the base (18) is rotatable in a direction opposite to the movement of the shaft (19) and driven by this shaft;
The packaging device according to claim 19 or 20, characterized in that it is comprised of a shaft. 23. Packing device according to claim 19 or 20, characterized in that the base (18) consists of one or more rollers or cylinders. 24. Claim 1, characterized in that at least the surface of the shaft (19) or the base (18) is fully or partially surface-treated in accordance with the desired coefficient of friction.
24. The packaging device according to any one of items 23 to 23. 25. A method of packaging an object using a plastic film using a device in which the gripping element is configured to pull the film tube over the object to be packed into the interior of the film section required for the packaging, the method comprising: The edges (22) of the film sections required for packaging away from the packaging object (3) are welded and the film hood (21) thus formed is attached to the gripping elements (14a, 14b, 14c, 14d). )
A bag-shaped part (2
4, 25) A method for packaging an object with a plastic film, characterized in that the item is sealed by an appropriate means. 26. Before the film hood (21) is covered with it,
or during the covering, the edges turned to the back side over the packaged object and thereby folded inwards and the externally accessible pouch-like parts (24a, 24b, 25a
, 25b) come to appear on the outer surface of the film hood (21). 27, the film hood (21) is stretched, and
It is pulled down at least until its inner surface reaches the upper surface of the packing object (3), and then the remaining bag-like parts (24, 25) are welded, with the packing object (3)
27. The packaging method according to claim 25 or 26, wherein the upper surface of the is used as a receiving surface during the welding process. 28, the film hood (21) is stretched, and
at least until its inner surface reaches the upper surface of the packing object (3) and air is blown into the externally accessible pouch-like part (24, 25), thereby causing it to open. to be kept in a state of
Adhesive is injected into the pouch-like openings (24, 25), followed by gluing the pouch-like parts (24, 25) under pressure;
27. Packing method according to claim 25, characterized in that the upper surface of the packaging object (3) is used as a receiving surface. 29, the film hood (21) is stretched and pulled down at least until its inner surface reaches the upper surface of the packaging object (3), and the outer surface of the film hood (21) is pulled down by means of a suction device; being pulled upwards, thereby keeping the pouch openings (24, 25) open, and injecting adhesive into the pouch openings (24, 25), and subsequently closing the pouch portions. (24, 25) are glued together under pressure, the upper surface of the packaging object being used as a receiving surface.
Packing method described in 6. 30, the film hood (21) is stretched, and
at least until its inner surface reaches the upper surface of the packing object (3) and heated air is blown into the externally accessible bag-like part (24, 25), thereby The film is melted by heat and the remaining melted bag-like opening (24, 2
27. Packaging method according to claim 25 or 26, characterized in that 5) is glued, the upper surface of the packaging object (3) being used as a receiving surface. 31, the film hood (21) is stretched, and
at least until its inner surface reaches the upper surface of the packaged object (3) and air is blown into the remaining bag top openings (24, 25), thereby causing said openings to open. condition and the opening (
24, 25) are applied with mechanical adhesive and subsequently the bag-like parts (24, 25) are glued under pressure, the upper surface of the packaging object (3) being used as a receiving surface. The packaging method according to claim 25 or 26, characterized in that: 32, the film hood (21) is stretched, and
at least until its inner surface reaches the upper surface of the packaging object (3) and the outer surface of the film hood (21) is drawn upwards by the suction device, thereby opening the bag-like opening (24, 25) is kept open and the openings (24, 25) are coated with adhesive and the bag-like parts (24, 25) are subsequently glued under pressure, with the packaging object (3 27. The packaging method according to claim 25 or 26, characterized in that the upper surface of the holder) is used as a receiving surface. 33. The adhesive necessary for bonding is applied to the corresponding parts when folding or welding the film tube, and the bag-shaped parts (24, 25) are bonded under pressure in the subsequent process. Claim 25 or 2, characterized in
Packing method described in 5. 34, the film hood (21) is stretched, and
It is pulled down at least until its inner surface reaches the upper surface of the packing object (3), and then the remaining bag-like part (24, 25) is manually or automatically applied with at least one adhesive tape (35, 36) The packaging method according to claim 25 or 26, characterized in that the packaging method is sealed with 36). 35. A method of packaging objects using a device in which a tubular plastic film is used and the gripping element is configured to pull the film tube over the object to be packed into the interior of the film section required for packaging. Then the film section required for packaging is folded over and then the edge (22) away from the packaging object (3)
) are welded and the thus formed rectangular film hood (21) is attached to the grip element (14).
a, 14b, 14c, 14d) and the thus formed remaining upwardly pointing triangular eaves (37, 38) are fixed to the film hood (21) by suitable means. A method of packaging an object with a plastic film, characterized in that: 36, the eaves-like parts (37, 38) are film hoods (
Claim 3 characterized in that it is welded to the side surface of 21).
Packing method described in 5. 37, the eaves-like parts (37, 38) are film hoods (
36. The packaging method according to claim 35, characterized in that it is welded to the upper surface of 21). 38, the eaves-like parts (37, 38) are film hoods (
36. The packaging method according to claim 35, characterized in that the packaging method is glued to the side or upper surface of 21). 39. After the film hood (21) is pulled over the packing object (3), the eaves-like portions (37, 38)
Claim 3 characterized in that it is welded along the horizontal upper side edge of the packaging composite and cut at the same time.
Packing method described in 5. 40. A device using a plastic film whose two sides facing each other are folded inwards, the gripping element being configured to pull the film tube over the object to be packed into the interior of the film section required for packaging. A method of packaging objects using
The multilayers (39a, 39b, 39c, 39d) are welded diagonally at an appropriate angle, and each edge is separated.
and the unfolded central double layer is welded straight, so that the film hood (40) thus formed has a canopy after being folded and pulled over the packaging object. , or a packaging method characterized in that it does not have a bag-like part that is accessible from the outside. 41, characterized by welding means movable on the film hood, having at least two welding beams arranged oppositely within a variable distance, with which means the remaining openings (24, 25 ), the closed canopy or residual canopy (37, 38) is welded to the film hood, the upper surface or side surface of the packaging object (3) serving as a receiving surface. 40
25. Packing device according to any one of claims 1 to 24 for carrying out a method according to any one of claims 1 to 24. 42. The welding means (28, 29) has two pairs of beams each arranged in parallel, at least one of which is for welding and separating the eaves-like portions (37, 38); 42. The packaging device according to claim 41, wherein the packaging device is a welded beam pressed against the eave-like portion. 43. Means for opening the bag-like part by blowing air or absorption of the film forming the bag-like part, movable above the film hood (21), for opening the adhesive. and at least one pressing plate (32) for pressing the movable adhesive-coated pouch on the pouch. Any one of claims 1 to 24 for carrying out the method according to any one of claims 25 to 40.
Packing equipment as described in Section. 44. Packaging device according to claim 43, characterized in that the device for applying adhesive to the bag-like part is a nozzle (30, 31) for spraying adhesive. 45. Packaging device according to claim 43, characterized in that the device for applying adhesive to the pouch-like part comprises an adhesive-impregnated brush insertable into the pouch-like part. 46. A device movable above the film hood (21) for blowing heated air into the bag-like part and at least one pressing plate movable above the bag-like part for pressing the bag-like part ( Claims 25 to 4 characterized by 32)
25. Apparatus according to any one of claims 1 to 24 for carrying out a method according to any one of claims 1 to 24. 47. Sealing or canopy part (37, 38) of the bag part (24, 25) movable above the film hood (21)
) for carrying out the method according to any one of claims 25 to 40, characterized by means for supplying at least one adhesive tape for the fixation of
25. The device according to any one of 24.