Patent Application
20150090831
The present invention relates to a method as well as to a device for changing carrier units with flat packaging material wound on supply rolls within a packaging machine.
For the processing, compilation, grouping and packaging of articles such as beverage containers there are different types of packaging, for example, the combination of the articles or containers in portable, relatively manageable container units. Various possibilities are also known for combining individual articles in larger containers. Thus, for example, beverage containers are mostly combined and packed by means of shrink films in containers of four, six or more containers. The manufacture of containers is for the most part indispensable, since they represent the most frequent variant of sales units for beverage containers or bottles made of PET plastic. The containers are partially combined again for transport.
In order to provide packaging material for the containers, devices are known from the prior art, which unwind the respective packaging material from one or several rolls and subsequently wrap the containers with the unwound packaging material. The unwinding is sensibly performed by machine, wherein, e.g., the respective packaging material is removed from the roll under rotating movement of the respective roll by means of one or several rollers. If the supply of packaging material of a roll is exhausted, the respective roll can be replaced manually or automatically by a new roll with additional packaging material.
A method and a device for delivering and changing rolls on a production machine is known, for example, from DE 40 40. 545 A1. The device comprises several supply rolls with strip material, which are arranged next to each other. If the strip material is to be unwound from one of the rolls, then the respective roll is received by an arm and is moved in a rotating manner to unwind the strip material. A beginning of the strip material is previously connected with a roller, which removes the strip material from the respective roll and guides it away from the device in the downward direction.
If the supply of strip material of the respective roll is exhausted, a new supply roll can be received by the arm and the consumed roll without strip material can be discarded by the arm. Since a threading of a beginning of the respective strip material between two adjacent rollers must occur before receipt of the new roll, the consumed roll must be discarded by the arm and the new roll must be received by the arm before unwinding, a changing process necessarily requires an interruption of the strip unwinding process. For this reason, during the changing process no strip material can be made available, so that a wrapping of the respective article with the strip material is interrupted for a certain period of time. Moreover, each changing process requires a multiplicity of necessary process steps, which requires a complex construction of the device and leads to the extensive implementation of the method.
Accordingly, it is seen as the priority objective of the present invention to make available a device and a method, which is characterized by an increased flexibility in changing the supply rolls. In addition, the method should be implementable in a simple manner and the device should possess an uncomplicated construction.
These objectives are achieved with the subjects of the independent claims. Features of advantageous developments of the invention arise from the dependent claims. Thus, the invention proposes on the one hand a method for achieving the cited objectives, which enables a changing of removable carrier units with flat packaging material wound on supply rolls, in particular, packaging film, within a packaging machine. The packaging machine is equipped with devices for the at least partial wrapping of piece goods, containers, article groups, etc. with packaging film. The devices for the at least partial wrapping of piece goods, containers, article groups, etc. can, for example, possess guide rods, which apply the flat packaging material to the respective piece goods, containers, article groups, etc. It is known to the addressed person skilled in the art how he can develop such devices, so that all conceivable variants are not addressed in the course of the present description.
In the case of the method according to the present invention it is provided that so-called carrier units or removable carrier units with new supply rolls, designed as removable magazines, are fed to a work area of a handling device in a series one after the other. It is conceivable for this that the respective removable carrier units stand on a horizontal conveyor when they are fed to the work area, which extends at least in sections into the work area of the handling device or feeds the respective removable magazines or removable carrier units to the work area of the handling device. The horizontal conveyor can preferably be designed as a conveyor belt and in particular as an endless conveyor belt.
The removable carrier units can stand up on the horizontal conveyor such that they are arranged essentially aligned to the transport direction of the horizontal conveyor. The respective longitudinal axis of the supply rolls of the removable carrier units standing up on the horizontal conveyor can be oriented in particular perpendicular to the transport direction of the horizontal conveyor. Thus, several, preferably, however, all of the new supply rolls of the removable carrier units standing up on the horizontal conveyor and transported there to the machine are oriented parallel to each other and during the transport via the horizontal conveyor maintain their parallel orientation unchanged.
The method according to the present invention makes possible the uninterrupted production of the packaging machine with endlessly fed packaging or film material, since at any point in time an “active” supply roll exists, which is located in the removable carrier unit and is unrolled there. During this unwinding process, which makes possible a certain operating time, in each case the other removable carrier unit, the supply roll of which is unwound, and which is therefore “inactive,” can be removed from the packaging machine without any problems and can be replaced by a new removable carrier, in this way brought into readiness, with a full supply roll of packaging material. Due to the—theoretically unlimited—multiplicity of quasi-endlessly feedable removable carrier units, which in each case can be brought one after another into the work area of the handling device, the packaging machine can remain uninterruptedly in use over a very long operating time.
In preferred embodiments of the present invention it can be envisioned that the horizontal conveyor possesses a specific longitudinal extension, so that several—if necessary also a multiplicity of—removable carrier units with supply rolls and flat packaging material can be deposited on the horizontal conveyor and simultaneously stand up on the horizontal conveyor. As a rule, it makes sense to arrange at least three, four, or five such removable carrier units one after the other and to feed the packaging machine in a series, so that at least a certain operating time is made possible without machine interruption.
The horizontal conveyor can here be designed as a buffer system, so that, if necessary, one or several removable carrier units can be deposited manually and/or automatically on the horizontal conveyor and can be stored temporarily when not in use on or by means of the horizontal conveyor. With the formation of the horizontal conveyor as a buffer system several prepared removable carrier units with supply rolls and flat packaging material can be advantageously located on the horizontal conveyor, wherein during a changing process the respective removable carrier units with new supply rolls and flat packaging material can be received by the horizontal conveyor via the handling device.
Here it is conceivable that the horizontal conveyor is operated intermittently, wherein one or several further removable carrier units are fed to the work area of the handling device by means of the horizontal conveyor, after receipt of one or several removable carrier units by the handling device. If a specific or sufficient number of removable carrier units are located in the work area of the handling device, the horizontal conveyor can be at a standstill or can undertake no further feeding of removable carrier units with new supply rolls to the work area of the handling device. The horizontal conveyor can for this purpose be coupled with a control unit, which is in addition connected with the handling device. Suitable algorithms or specifications for the intermittent operation of the horizontal conveyor can be stored on the control unit taking into consideration a receipt of removable carrier units by the handling device. In addition, it is conceivable that the control unit is connected with a discharge device described below in detail and intermittently controls the discharge device taking into consideration a changing process.
It is further provided that a work area of the handling device extends into at least one position of the operating position of the magazine or removable carrier unit equipped with a supply roll, which is arranged in the packaging machine. As mentioned in detail below, at least two different installation positions are provided in the packaging machine for removable carrier units with new supply rolls. The work area can herein be designed such that via the handling device removable carrier units with new supply rolls are usable in all of the at least two installation positions.
For example, the handling device can have a gripper arm for the receipt and for the insertion of removable carrier units into the packaging machine, the extension of which in a radial movement defines the work area of the handling device. In the framework of the present invention that area can be designed as a work area, within which the handling device can receive the removable carrier units and pass them on to the packaging machine or can insert them into the respective installation position of the packaging machine.
For example, it is conceivable that the handling device is arranged between the previously mentioned horizontal conveyor and the respective position of the operating position of the removable carrier unit located in the packaging machine. In preferred embodiments the handling device can be arranged lateral to the respective removable carrier unit located in the packaging machine and by a swiveling movement of the gripper arm cause the insertion of the respective removable carrier unit with new supply roll into the packaging machine.
The work area must also be designed such that the handling device can replace removable carrier units located in the packaging machine and used up supply rolls with respective new removable carrier units with a new supply roll. Thus, it can, for example, be envisaged, that after use of removable carrier units with new supply rolls the respective supply roll of the inserted removable carrier unit is firmly connected with the packaging machine, so that the removable carrier unit can be removed from the packaging machine without the supply roll by the handling device. In preferred embodiments flat packaging material is unwound from the new packaging roll in one process step and in a further and subsequent process step the removable carrier unit or the removable magazine is removed from the packaging machine.
Here it is also conceivable that, when using the removable carrier unit with the new supply roll, the new supply roll is placed on a holding mandrel of the packaging machine. The holding mandrel can be designed such that after use of the removable carrier unit with the new supply roll it enlarges its maximum cross-sectional diameter and thus fixes the new supply roll by clamping. After clamping fixation of the supply roll via the holding mandrel the removable carrier unit can be removed advantageously without the new supply roll. By means of the clamping fixation via the holding mandrel with enlarged maximum cross-sectional diameter a shift or a position change of the new supply roll is prevented during removal of the removable carrier unit.
In particular, embodiments have proven successful, in which after insertion of the removable carrier unit with a new supply roll into the packaging machine initially a partial, but not complete unwinding of the flat packaging material from the new supply roll occurs, before the new supply roll is clamped via the respective holding mandrel or before the respective removable carrier unit of the partially, but not completely unwound supply roll is removed from the packaging machine.
In addition, it is envisaged according to the present invention that respective new removable carrier units are inserted alternately in at least two different installation positions in the packaging machine and their flat packaging material is connected with the packaging material still located in the packaging machine.
Welding processes, particularly welding processes with a welding bar or the like are suitable, for example, for connecting the flat packaging material of new supply rolls with the packaging material located in the packaging machine. In preferred embodiments the flat packaging material of the respective new supply roll is brought into contact with the packaging material located in the packaging machine before connection and before welding. Thus, it can be envisaged, for example, that the packaging machine has two installation positions for one removable carrier unit with a new supply roll, respectively.
Thus, a supply roll can be arranged on a first of the two installation positions, from which packaging material is unwound, wherein a new removable carrier unit with new supply roll and packaging material is simultaneously inserted into the second of the installation positions by the handling device.
The method according to the present invention is designed in preferred embodiments such that a supply roll is arranged continuously in at least one of the installation positions, from which flat packaging material is unwound. If a removable carrier unit is arranged in the area of the first installation position or if a removable carrier unit is assigned to the supply roll, from which packaging material is unwound, then a removal of the removable carrier unit from the first installation position can take place. For this purpose, it can sensibly be envisaged that, as already previously mentioned, the supply roll, from which packaging material is unwound, is clamped by a holding mandrel by means of enlargement of its maximum cross-sectional diameter.
After receipt of a removable carrier unit from the installation position the handling device can preferably set down the respective removable carrier unit on a discharge device. The discharge device can also be embodied as a horizontal conveyor. In particular, embodiments are conceivable, in which the discharge device is formed by a conveyor belt or an endless conveyor belt.
If the feeding of removable magazines or removable carrier units with new supply rolls occurs in the work area of the handling device, as already previously mentioned, by means of a horizontal conveyor, then the discharge device can be oriented parallel to it. The transport direction for the removal of magazines can thus run parallel to the transport direction for the feeding of removable carrier units with new supply rolls. For example, the discharge of the magazine can occur in the direction of an equipment section, wherein magazines or removable carrier units discharged in the equipment section are equipped with new supply rolls and are placed on the horizontal conveyor for feeding to the work area of the handling device as removable magazines or removable carrier units with new supply rolls. In the equipment section the preparation of the removable carrier units with new supply rolls can thus occur. The preparation of the respective removable carrier units with new supply rolls can occur automatically and/or manually.
As already previously mentioned, a supply roll can be arranged continuously in at least one of the installation positions, from which flat packaging material is unwound. If a removable carrier unit with new supply roll is inserted in another one of the installation positions, the flat packaging material of the new supply roll can be connected to the flat packaging material of the additional supply roll, from which flat packaging material is unwound.
In preferred embodiments it can be envisaged that the removable carrier units are respectively made available alternately for at least two different installation positions in the packaging machine for the simplified insertion of removable carrier units and for the simplified connection of the respective flat packaging materials, wherein the removable carrier units are prepared for the at least two different installation positions in the packaging machine during feeding to the work area of the handling device.
For this purpose, first removable carrier units can be provided, which are designed for insertion into the first installation position. In addition, second removable carrier units can be provided, which are designed for insertion into the second installation position. First and second removable carrier units can be fed alternately into the work area of the handling device and alternately received by the handling device and are inserted into the installation position provided for the respective first or second removable magazine. If the feeding of removable carrier units occurs via a horizontal conveyor, first and second removable carrier units can be arranged standing up in a series one after the other on the horizontal conveyor as part of the preparation.
New supply rolls of the respective first removable carrier units can be oriented parallel to new supply rolls of the respective second removable carrier units during transport via the horizontal conveyor and/or in the respective installation position. Usefully, first and second magazines or carrier units of the used up supply rolls can be alternately removed from the packaging machine and, if applicable, set down on a discharge device.
If the removable carrier units stand up on a horizontal conveyor during the feeding to the work area of the handling device, the transport direction of the horizontal conveyor can be oriented such that an insertion of the removable carrier units into the respective installation positions can be carried out without a rotation of the removable carrier units and by means of a displacement by the handling device. In particular, the respective removable carrier units with new supply rolls can be lifted for insertion into the respective installation position.
If the discharge of the removable carrier units or magazines with used supply rolls also takes place by means of the horizontal conveyor, the horizontal conveyor can be oriented such that a setting down of the removable carrier units or magazines can occur without rotating on the discharge device designed as a horizontal conveyor.
In particular, embodiments have proven successful, in which the handling device is formed by a multiaxially movable handling robot, which both inserts new removable carrier units into the packaging machine as well as removes used removable carrier units or magazines from the packaging machine.
For this purpose the handling robot can be designed rotatable about a vertically oriented axis. A gripper arm of the handling robot can be raised and lowered about an at least approximately horizontally oriented axis. The gripper arm can consist of two or several parts, which, if applicable, can be pivoted counterclockwise about at least approximately horizontally oriented axes. In addition, the handling robot can have a head, which is designed rotatable and is provided for the receipt of the respective removable carrier units and/or used up supply rolls.
Here it is conceivable that the handling device removes the respective removable carrier unit assigned to the supply roll before a removal of the respective used up supply roll and that, during removal of the removable carrier unit, the respective assigned supply roll possesses at least a remaining stock of flat packaging material. Packaging material can be unwound from the supply roll during the removal of the magazine.
In addition, it is conceivable that the handling device or the handling robot removes a used up supply roll from the packaging machine before the insertion of new removable carrier units. If a supply roll is used up, then no more flat packaging material is stored on the supply roll.
As already previously mentioned, the supply rolls can be placed on a holding mandrel during insertion of the respective removable carrier unit. When the supply roll is removed from the packaging machine the handling device can thus, if necessary, remove the respective roll from the holding mandrel. If the supply roll was fixed on the holding mandrel by enlargement of its maximum cross-sectional diameter, then the fixation can usefully be released before the removal of the supply roll by reducing the maximum cross-sectional diameter of the holding mandrel. To remove the respective used up supply roll from the packaging machine the handling device can possess one or several gripper fingers or the like, which grasp the respective used up supply roll for removal from the packaging machine by clamping.
It is conceivable, for example, that the handling device stores the used up supply roll in a storage container. It can also be envisaged that the handling device passes on the used up supply roll after removal from the packaging machine to one or several transport devices for discharge. After that the used up supply roll can be provided with additional flat packaging material and can again be fed to the work area of the handling device as new supply roll with a corresponding removable magazine or a removable carrier unit. The supply roll can be designed with respect to its geometry as a hollow cylinder and can consist, for example, of plastic or materials with components containing cellulose.
In addition, in preferred embodiments it can be envisaged that a beginning of the flat packaging material of a supply roll of the respective newly inserted renewable carrier units is connected with a section of the flat packaging material guided in the packaging machine under separation of an end of the respective used up supply roll of the respective other removable carrier units, particularly through a welding process by means of a welding bar or the like.
For example, the beginning of the flat packaging material can be applied by a guide element to the flat packaging material guided in the packaging machine, wherein subsequently a welding occurs by means of a welding bar. Here it is conceivable that during or immediately after separation of the end of the respective used up supply roll the beginning of the flat packaging material is applied to the flat packaging material guided in the packaging machine. Here, the guide element can describe a movement which is oriented at least approximately downwards in the vertical direction. In addition, the guide element can make contact with the flat packaging material in its downwards vertical movement. The beginning of the flat packaging material can be guided downwards in the vertical direction and towards the flat packaging material guided in the packaging machine together with the guide element. Preferably the beginning of the flat packaging material is already brought into surface contact with the flat packaging material guided in the packaging machine before the welding. In particular, embodiments have proven successful, in which the guide element in its vertical guidance downwards is brought into contact with the flat packaging material over the entire width of the flat packaging material.
In order to wrap the respective piece goods, containers, article groups, or the like permanently with flat packaging material, particular embodiments have proven successful, in which a removable carrier unit with a used up supply roll of packaging material is removed during an uninterrupted operation of the packaging machine and is replaced by a removable carrier unit with a new supply roll. In order to be able to guarantee an uninterrupted operation, a removable carrier unit with new supply roll must already be inserted into the respective installation position of the packaging machine, before the flat packaging material of a supply roll in another installation position is completely used up or completely unwound. The flat packaging material of the new supply roll can then be connected with the flat packaging material of the other supply roll, preferably by means of welding.
An additional feature of various embodiments of the method according to the present invention can consist in an active carrier element or an active removable carrier unit being located in the packaging machine, the supply roll of which, with packaging material, is unwound while a still inactive removable carrier unit is also already located in the machine, which was placed there beforehand by means of the handling device. If the supply roll of the active removable carrier unit is used up and unwound, a “switching” between the two removable carrier units can occur by welding the packaging material with the beginning of the film of the respective other removable carrier unit, so that the first removable carrier unit with the used up supply roll can be removed from the machine at a suitable point in time, without an interruption of the packaging process having to occur. I.e., the carrier element with the empty supply roll can be removed and transported away from the packaging machine immediately after the welding of the beginning of the supply roll of the respective other carrier element. Since these processes can be repeated almost arbitrarily often in the case of a sufficient supply with a multiplicity of removable carrier units fed one after the other, a quasi-endless operation of the packaging machine is thus made possible, if sufficient new removable carrier units with respective new supply rolls of packaging material are fed to the feeding device. Since the buffer size is basically arbitrarily expandable, an almost arbitrarily long operation time can be predefined and realized for an uninterrupted continuous operation. A further advantage of the carrier element or removable carrier unit used consists in that the handling device or the robot used for this purpose need not directly grasp the supply rolls with the wound-up packaging material. Thus, the part—i.e. the entire removable carrier unit—can be removed and used in the ongoing operation. The clamping rods provided on the removable carrier units, to which the beginning of the belt can be fixed, considerably facilitate the automatic welding of the packaging material or the packaging film, and do so while simultaneously precisely positioning the unwound material. Neither the threading of the beginning of the material nor its manually assisted fixation or welding to the endless material in the machine is required, so that previously required manufacturing and handling steps can be dispensed with.
In various embodiments it can be envisaged that a removal of a cassette as well as an empty supply roll from the packaging machine occurs at least approximately at the same time and in one process step. In especially preferred embodiments, however, as already previously described in detail, it is envisaged that empty supply rolls as well as cassettes are removed from the packaging machine in separate and successive process steps.
In addition, the present invention relates to a device for changing removable carrier units with flat packaging material wound on supply rolls, in particular packaging film, within a packaging machine. Here it should be mentioned that all previously described features, which can be provided for implementing the method according to the present invention, can also be used in various embodiments of the device according to the present invention. Likewise, all features, which are described below for various embodiments of the device according to the present invention, can be used in additional embodiments of the method according to the present method.
The packaging machine is equipped with devices for the at least partial wrapping of piece goods, containers, article groups, etc. with packaging film.
The device according to the present invention comprises a feeding device for the provision of removable magazines or removable carrier units with new supply rolls in a series one after the other, which is assigned to a work area of a handling device. As already previously mentioned, in preferred embodiments of the present invention, the feeding device is formed by one or several horizontal conveyors, which guide the respective removable carrier units with new supply rolls into the work area of the handling device. In particular, embodiments are suitable with the formation of one or several horizontal conveyors by one or several endless conveyor belts. The one or several horizontal conveyors designed as a feeding device thus extend, if necessary, at least in sections into the work area of the handling device. In various embodiments more than one handling device can also be used. In practice, however, it has been shown that in preferred embodiments one handling device can suffice, in order to insert removable carrier units with new supply rolls alternately into the respective installation position.
In particular, if the feeding device is formed by one or several horizontal conveyors, the one or several horizontal conveyors may be operated in a synchronized manner or intermittently. For example, it can be envisaged that one or several additional removable carrier units are guided into the work area of the handling device by means of the feeding device or by means of one or several horizontal conveyors after receipt of one or several removable carrier units by the handling device, so that at least one removable carrier unit is continuously provided by the feeding device for the work area of the feeding device.
The feeding device or the one or several horizontal conveyors can be designed here as a buffer system, which stores several removable carrier units with new supply rolls and provides the handling device as required with the respective removable carrier units.
The work area of the handling device extends into at least one position of the operating position of the removable carrier unit arranged in the packaging machine, which is equipped with a supply roll. In addition, the work area is designed such that the new removable carrier units can be inserted at the different installation positions into the device by means of the handling device.
In the device according to the present invention it is also envisaged that respective new removable carrier units with the respective new supply roll can be inserted alternately at at least two different installation positions in the packaging machine and the flat packaging material of which can be connected to the packaging material still located in the packaging machine. For example, it is conceivable that two installation positions are provided for removable carrier units and supply rolls, wherein in the available supply rolls in both of the installation positions the supply roll of the first installation position has a parallel orientation to the supply roll of the second installation position.
Preferably it can be envisaged that the removable carrier units are prepared at the latest upon entry into the work area of the handling device for the respective at least two different installation positions in the packaging machine. Thus, one prepared removable carrier unit can be assigned a new supply roll. In addition, a prepared removable carrier unit can be characterized by a certain orientation to the feeding device, so that it can be removed from the feeding device by means of the handling device and can be inserted into the respective installation position without rotation.
In preferred embodiments the removable carrier units can respectively be formed by cassettes, which have a frame, which is designed for the supportive holding of the respective new supply roll and its flat packaging material. For example, the frame can have at least two support rods extending respectively parallel to the respective new supply roll, on which the respective new supply roll rests. The respective longitudinal extension of the at least two support rods can correspond at least to the longitudinal extension of the supply roll, however, preferably be embodied approximately identical to the longitudinal extension of the supply roll.
In addition, the removable carrier units, the removable magazines, or the cassettes have at least on one side one or several bore holes, into which the handling device dips to receive the respective removable carrier units with correspondingly designed gripper fingers. It is also conceivable that the removable carrier units form a lateral block for the respective new supply roll, at which the respective new supply roll lines up. The respective new supply roll of the respective removable carrier unit or the respective cassette can be held by the block in a predefined position. A lateral shift of the respective new supply roll from the respective removable magazine or from the respective cassette or respective removable carrier unit is prevented by the lateral block. The respective removable carrier units or the respective cassettes can, for example, be formed by plastic and/or metal.
In addition, it can be envisaged that the cassettes or removable carrier units respectively possess a supporting bar extending parallel to the supply roll, which prior to connection with the packaging material located in the packaging machine carries a beginning of the flat packaging material wound on the new supply roll of the respective cassette. If the respective removable carrier unit also possesses at least two support rods for carrying the new supply roll, the at least two support rods and the supporting bar can extend parallel to each other.
In preferred embodiments it can be envisaged that at least one first installation position is provided for first removable carrier units and at least one second installation position for second removable carrier units. Here the first removable carrier units can have one supporting bar, which is arranged on a first side of the removable carrier unit, while the second removable carrier units have a supporting bar, which is arranged on a second side of the removable carrier unit, wherein with regard to the feeding of the first and the second removable carrier units to the work area of the handling device the first side is opposite the second side.
Furthermore, it can be envisaged that in the first removable carrier units the flat packaging material of the respective new supply rolls is guided upwards in the direction of the supporting bar, while in the second removable carrier unit the flat packaging material of the respective new supply roll is guided downwards in the direction of the supporting bar.
In various embodiments the flat packaging material, which is provided for the at least partial wrapping of piece goods, containers, article groups, etc., can have optical markings, so that a connection to defined positions of the flat packaging material of the new supply rolls with the packaging material still located in the packaging machine is necessary.
Embodiments have proven successful for this, in which the supporting bars of the cassettes are designed rotatably, so that flat packaging material of the respective new supply roll can be wound on the supporting bar of the respective cassette. A winding of the respective flat packaging material can occur such that the respective flat packaging material is aligned for the connection or defined positions can be set for the connection of the flat packaging material with the packaging material still located in the packaging machine by winding.
The winding of the flat packaging material on the respective supporting bar can occur during or in the course of the preparation of the removable carrier units and thus prior to entry of the removable carrier units into the work area of the handling device. Here is it conceivable that the winding is undertaken manually and/or automatically.
In particular, embodiments have proven successful, in which the packaging machine has at least one first installation position for first removable carrier units and has at least one second installation position for second removable carrier units. The supporting bars of the first removable carrier units and the second removable carrier units can be arranged on opposite sides, so that the supporting bars of the first removable carrier units when inserted into the first installation position point in the direction of the second installation position and the supporting bars of the second removable carrier units when inserted into the second installation position point in the direction of the first installation position.
As already previously mentioned, the beginning of the flat packaging material of a new supply roll can be applied to the flat packaging material guided in the packaging machine by a guide element, in which case a welding subsequently takes place by means of the welding bar. The respective supporting bars in the case of a removable carrier unit inserted in the respective installation position can direct the flat packaging material of the new supply roll beneath the guide element to the guide element. Through a downwards vertical movement of the guide element the flat packaging material of the new supply roll can then be applied to the packaging material still located in the packaging machine and subsequently, preferably by means of welding, can be connected to the packaging material still located in the packaging machine.
In the case of a device according to the present invention when the respective removable carrier unit is inserted into the respective installation position the respective new supply roll can be placed on a holding mandrel, so that by means of enlarging its cross-sectional diameter the respective supply roll can be fixed on the holding mandrel by means of clamping.
Also, in the framework of the device according to the present invention the handling device can be formed by a multiaxially movable handling robot, which both inserts new removable carrier units into the packaging machine as well as removes used removable carrier units with empty supply rolls from it. As already previously mentioned, the handling robot can be designed rotatable about a vertical axis as well as possess a gripper arm, which is designed pivotable about one or several horizontally oriented axes.
If a discharge device is provided for carrier units removed by the handling device from the packaging machine, the discharge device can be formed by one or several horizontal conveyors, in particular by endless conveyor belts.
In the following, embodiments should explain in detail the invention and its advantages by means of the attached figures. The proportions of the individual elements in relation to each other in the figures does not always correspond to the real proportions, since some forms are simplified and other forms are enlarged in proportion to other elements for better illustration.
For similar or similarly operating elements of the invention identical reference signs are used. Furthermore, for the sake of providing an overview only reference signs are presented in the individual figures, which are required for the description of the respective figure. The embodiments depicted constitute only examples of how the device according the present invention or the method according to the present invention can be arranged and do not represent a final limitation.
The schematic perspective view of
The packaging machine 3 comprises in practice several devices, which are designed for wrapping articles with the flat packaging material 11. For reasons of clarity the devices are not depicted in the figures of the present patent application.
As can be seen from
In addition, a handling device 5 is depicted, which is designed as a multi-axial movable handling robot 50 and possesses a work area AB, within which it can remove removable carrier units 8a and 8b from the horizontal conveyor 40 and can insert the respective removable carrier units 8a and 8b into one of the assigned installation positions EB1 or EB2 (see
The feeding device 4 or the horizontal conveyor 40 extends into the work area AB of the handling device 5 and conveys removable carrier units 8a or 8b one after another into the work area AB.
As can be seen in
In addition,
In order to be able to receive the respective removable carrier units 8a or 8b from the horizontal conveyor 40 and to insert them into the respective installation position EB1 or EB2, the handling device 5 designed as a handling robot 50 is rotatable about a vertical axis V. The freedom of movement of an exemplary handling device 5, as it is also used in
In addition, the work area AB of the handling device 5 is designed such that the handling device 5 can remove used up supply rolls 9′ without packaging film 11 from the packaging machine 3.
If a removable carrier unit 8a or 8b with new supply roll 9 is inserted into the respective installation position EB1 or EB2 of the packaging machine 3, then the new supply roll 9 is placed on a holding mandrel 15 or 15′ (see
After a certain share of packaging film 11 has been unwound from the new supply roll 9 in the packaging machine 3, the respective new supply roll 9 is no longer in surface contact with the respective removable carrier unit 8a′ or 8b′. After that the respective removable carrier unit 8a′ or 8b′ assigned to the new supply roll 9 can be removed by the handling device 5 from the packaging machine 3. Advantageously, the new supply roll 9 is here fixed via the respective holding mandrel 15 or 15′ shown in
Since the work area AB of the handling device 5 extends into the positions of the operation position of removable carrier units 8a′ or 8b′, the handling device 5 or the handling robot 50 can remove removable carrier units 8a′ or 8b′ from the packaging machine 3. If a removable carrier unit 8a′ or 8b′ was removed from the packaging machine 3, then the respective removable carrier unit 8a′ or 8b′ can be put down by the handling device 5 on the discharge device 6 or on the horizontal conveyor 60.
The discharge device 6 or the horizontal conveyor 60 possesses a transport direction TR2 for the removable carrier units 8a′ or 8b′, which runs parallel to the transport direction of the feeding device 6 designed as a horizontal conveyor 60. The discharge device 6 leads the removable carrier units 8a′ or 8b′ in the direction of an equipment section 17 (see
As can be seen in
As can also be clearly seen in
Since the removal of first and second removable carrier units 8a′ or 8b′ from the packaging machine 3 also occurs alternately, the removable carrier units 8a′ or 8b′ are also arranged alternately on the discharge device 6 or the removable carrier units 8a′ or 8b′ are transported away alternately by the discharge device 6.
In addition, a schematic top view of the embodiment of a device 1 from
After insertion of the respective removable carrier units 8a or 8b with new supply rolls 9 a holding mandrel 15 or 15′ grasps through the respective supply roll 9 which cannot be seen in
In addition,
In addition, the reference number 23 refers to an actuating element for a welding bar not depicted in
By means of an enlargement of the cross-sectional diameter of the holding mandrel 15 the supply roll 9 can be held by clamping in the first installation position EB1, whereupon the removable carrier unit 8a or the magazine 8a′ is removed from the first installation position EB1 and is set down on the discharge device 6 by means of the handling device 5 or the handling robot 50 (see
After the packaging film 11′ was separated from the supply roll 9 arranged in the second installation position EB2 and after the removable carrier unit 8a or the magazine 8a′ was removed from the first installation position EB1, by means of the handling device 5 the supply roll 9 of the second installation position EB2 was removed from the holding mandrel 15′ and by means of the handling device 5 set down in a storage module 13 (see
A second removable carrier unit 8b with new supply roll 9 can then be placed by means of the handling device 5 into the second installation position EB2. The insertion of a removable carrier unit 8a or 8b thus occurs, while packaging film 11 or 11′ is unwound from a supply roll 9 of the first installation position EB1 or the second installation position EB2. Thus, during the uninterrupted operation of the packaging machine 3 a supply roll 9 is arranged permanently at one of the two installation positions EB1 or EB2, from which packaging film 11 or 11′ is unwound.
The removable carrier units 8a and 8b are in each case designed as cassettes, which have a frame, which is designed for supportive holding of the respective new supply roll 9 and its packaging film 11. The frame has two bore holes 25 and 25′, into which gripper fingers 31 (see
In addition, the removable carrier units 8a and 8b possess in each case main pillars 27 and 27′, by means of which they stand up on the feeding device 4 or on the horizontal conveyor 40 as well as on the packaging machine 3 in the respective installation position EB1 or EB2. Furthermore, in each case they possess a block 33, at which the respective supply roll 9 lines up via its packaging film 11 on the respective removable carrier unit 8a or 8b. Advantageously the respective supply roll 9 can be held laterally via the block, so that a lateral slipping of the supply roll 9 off of the removable carrier unit 8a or 8b is prevented particularly during insertion into the respective installation position EB1 or EB2.
In addition, the supporting bar 19 is depicted, which carries a beginning of the packaging film 11 before vertical lowering of the guide element 29. If the removable carrier unit 8a or 8b is located in the respective installation position EB1 or EB2, the supporting bar 19 or 19′ is oriented parallel to the holding mandrel 15 or 15′. The supporting bar 19 or 19′ is connected to a wheel 35, via which the supporting bar 19 or 19′ can be moved in a rotary manner. With rotation of the supporting bar 19 or 19′ the packaging film 11 is wound up on the supporting bar 19 or 19′.
If the packaging film 11 has optical markings, a connection to the packaging film 11′ still remaining in the packaging machine 3 at defined locations can be desirable. For the position specification for the welding the packaging film is wound up via the wheel 35 on the supporting bar 19. In the present case the wheel 35 is actuated manually, in other embodiments an actuation by machine is conceivable with position specification of the packaging film 11 or of the packaging material 10 for the welding. Advantageously the position specification of the packaging film 11 for the welding already occurs before placing the respective removable carrier unit 8a or 8b on the feeding device 4, however, at latest before the entry of the respective removable carrier unit 8a or 8b in the work area AB (see
In the first removable carrier units 8a, as shown in
In addition, the supporting bars 19 or 19′ pass by the flat packaging material 10 or the packaging film 11 underneath the guide element 29 on the guide element 29, so that by means of its vertical movement downwards the guide element 29 can come into contact with the respective packaging film 11 and for the purpose of its welding guide the packaging film 11 with the guide element 29 downwards and towards the packaging film 11′ still remaining in the packaging machine 3 or towards the flat packaging material 10 still remaining in the packaging machine 3.
Analogous to
In addition,
In addition, as can be seen in
In addition, a gripper hand 41 is arranged on its free end 38, which is provided for the receipt of used up supply rolls 9′ from the respective installation position EB1 or EB2. The gripper hand 41 is also designed rotatable about a fourth horizontal axis H4. The fourth horizontal axis H4 runs perpendicular to the third horizontal axis H3.
By means of the handling device 5 depicted by way of example in
The invention was described by reference to a preferred embodiment. However, it is conceivable for a person skilled in the art, that variations or modifications of the invention can be made, without thereby departing from the scope of the following claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 102013110944.6 | Oct 2013 | DE | national |
