CN114502491A - Linear transport system with minimum transport pitch - Google Patents
Linear transport system with minimum transport pitch Download PDFInfo
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- CN114502491A CN114502491A CN202080069290.9A CN202080069290A CN114502491A CN 114502491 A CN114502491 A CN 114502491A CN 202080069290 A CN202080069290 A CN 202080069290A CN 114502491 A CN114502491 A CN 114502491A
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- 230000032258 transport Effects 0.000 description 368
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- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 235000013361 beverage Nutrition 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G54/00—Non-mechanical conveyors not otherwise provided for
- B65G54/02—Non-mechanical conveyors not otherwise provided for electrostatic, electric, or magnetic
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
- H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
Abstract
The invention provides a group of transport elements (100, 200; 100 a-b, 200a) for transporting containers for a long-stator linear motor system having at least two transport paths (120, 220) arranged offset to one another, wherein the group comprises at least one transport element (100; 100 a-b) of a first construction type and at least one transport element (200; 200a) of a second construction type for a single controlled movement along a first or a second transport path (120, 220) of the transport paths arranged offset to one another, and wherein the transport elements of the first and second construction types are configured differently such that an offset between the first and second transport paths can be compensated for the position of the container to be transported.
Description
Technical Field
The invention relates to a device for enabling controlled movement of a single-controlled transport element for transporting containers, in particular bottles, cans or preforms, within a facility for handling containers.
Background
Transport systems with linear motor drives (so-called linear transport systems) are well known in the art. The best known example is passenger rapid trains based on magnetic levitation technology. However, transport systems with linear motor drives are also used in many industrial fields, in particular for the individual transport of individual goods within a production line.
For example, DE 102013218389 a1 describes a linear transport system with a plurality of magnet motors for transporting bottles in a container treatment plant. The mover of the transport bottle is driven in this case by a magnetic interaction between a secondary part of the mover, which carries permanent magnets and/or electromagnets, and two long stators along two parallel-guided guide rails, which are connected to the respective long stators. The mover is supported on the guide rails via rollers and has a running carriage in the plane of the roller bearing, which is usually rectangular in shape, wherein pairs of rollers, which are only slightly spaced apart from one another in the longitudinal direction of the mover, act on the respective guide rails.
The design of such a mover leads to conflicting requirements in practice. On the one hand, the mover should have as large a dimension as possible in the longitudinal direction (i.e. in the direction of motion) in order to reduce wear and load of the bearing elements, typically rollers. Furthermore, the rollers can be made smaller in the case of a long mover than in the case of a short mover. Alternatively, the mover may absorb more load when the specifications of the supporting elements are the same.
It is, however, desirable to design the mover as short as possible, in order to keep the distance between the containers or objects transported by the mover in the produced container flow (i.e. the so-called transport pitch or pitch) as small as possible and thus to enable the throughput of containers per unit time of a container treatment plant using the transport system to be as large as possible. If each mover transports exactly one container, a minimum pitch that can be achieved is obtained, for example, when successive movers travel in abutment. Thus, if the container is smaller than the mover, this minimum pitch that can be achieved corresponds to the maximum longitudinal dimension of the mover. A small longitudinal dimension of the mover is also desirable in order to be able to receive small containers in a stacked state from the transport belt at the transfer point.
The size of the running gear of the mover is often the limiting factor in determining the minimum transport pitch that can be achieved, since it determines the position or spacing of the supporting elements (e.g. rollers). Furthermore, the size of the secondary part, which usually has a carrying plate and magnets mounted thereon, in the transport direction may also hinder the reduction of the minimum transport pitch that can be achieved. For example, the dimension of the magnets in the transport direction is predetermined by the configuration of the coils of the long stator and therefore cannot be reduced at will, wherein a sequence of a plurality of alternately polarized magnets in the movement direction (i.e. the longitudinal direction) of the mover is usually provided in order to achieve an optimal propulsion. The longitudinal dimension of this sequence here defines the minimum achievable longitudinal dimension of the secondary part and therefore sets a lower limit for the minimum achievable transport pitch.
In practice, the minimum transport pitch that can be achieved is even significantly higher than the longitudinal dimension of the secondary parts, since the secondary parts of the following mover, when too close, will either strongly attract or strongly repel each other depending on the magnetization of the magnets of the adjacent sequence. In both cases the generated force will far exceed the propulsion of the linear motor and thus a controlled movement of the mover can no longer be achieved. For this reason, in practice there is always a sufficiently large gap between the secondary parts of successive movers.
However, for some applications, in particular in the beverage processing industry, it is desirable to achieve as small a pitch spacing as possible between the two movers. For example, it is desirable to direct plastic bottle (e.g., PET bottle) preforms to an infrared oven of a stretch blow molding machine at a pitch spacing of 36mm or less. However, with the hitherto known secondary parts having a longitudinal dimension of 45mm or more, this is not possible.
Thus, DE 102015226139 a1 proposes transport elements whose shape and arrangement of the rollers are selected such that successive transport elements can be staggered to such an extent that the resulting transport pitch is smaller than the dimension of the transport elements in the transport direction. Additionally, special secondary parts are described which enable such staggered travel of the transport elements.
However, the described secondary part still has a small interaction surface for electromagnetic propulsion, resulting in a weaker propulsion. Furthermore, these transport elements are partly difficult to manufacture.
Disclosure of Invention
It is therefore an object of the present invention to provide a linear transport system which allows a transport pitch to be as small as possible without negatively affecting the controllability and propulsion of the mover. Furthermore, wear and load of the bearing elements of the mover should be reduced. In summary, the object of the invention is to increase the throughput of a linear transport system with low maintenance expenditure.
The object is achieved by a transport element group for a long stator linear motor system having at least two transport paths arranged offset to one another, each transport path having at least one long stator linear motor and at least one guide element, wherein the transport elements are each designed for transporting at least one container, in particular a bottle or a preform, and the transport elements each have at least one secondary part for magnetically interacting with the long stator linear motor, wherein the group comprises at least one transport element of a first type of construction and at least one transport element of a second type of construction for a single controlled movement along a first or a second transport path of the transport paths arranged offset to one another, and wherein the transport elements of the first and second type of construction are designed differently in such a way that an offset between the first and second transport path can be compensated for the position of the transported container .
The transport element is used in particular for transporting containers within a container processing facility. The container is in particular a beverage bottle, but can also be another container for food, pharmaceuticals, hygiene products, detergents and the like, such as a can, a glass bottle or other glass container with a lid, a package based on cardboard or composite material, a tetra pack (Tetrapack) or the like. In the case of containers made of plastic, it is also proposed that intermediate products, in particular preforms (so-called preforms), be used for stretch blow molding of the containers. Furthermore, a container is also to be understood as a multi-pack in which a plurality of containers are combined.
As is known per se, the transport element can be configured as a mover, a Puck (Puck), a carriage, a shuttle or the like, which can be moved along the transport path by magnetic interaction with at least one long stator of the linear motor of the transport path, i.e. a linear motor chain. Depending on the requirements of the transport path, each transport element can here accelerate, decelerate, move at a constant speed or sometimes also stop completely. Thus, a variable displacement time profile of each individual transport element can be achieved by individual control of the transport elements.
The transport element group is designed for use with a long-stator linear motor system having at least two transport paths arranged offset from one another, each transport path having at least one long-stator linear motor and at least one guide element. Long stator linear motor drives are well known in the art and thus a detailed description is omitted herein. It should only be mentioned that the at least two transport paths can be configured in particular with a linear motor drive on one side. Furthermore, one or more guide elements arranged parallel to one another can be provided, on which the transport element can be arranged movably, i.e. supported, by means of suitable support elements (e.g. rollers, sliding bearings, etc.). In particular, a linear motor chain can be arranged between two guide elements, which are configured as guide rails, for example. Various guide rail and elongated stator embodiments are known in the art.
According to the invention, at least two transport paths are arranged offset to one another. In this case, an offset in the vertical direction (i.e. perpendicular to the seating surface of the long-stator linear motor system) and/or an offset in the horizontal direction (i.e. parallel to the seating surface) can be provided between the transport paths. The offset can be defined in particular as the vertical spacing between the respective elements of the transport path, for example the spacing between the center planes or center points of the long stators. The transport paths may, but need not, be identical in structure. For example, one of the transport paths may have an additional guide element. The type and shape of the guide elements and the development of the long stator can also differ for the transport path. In the case of an identical construction of the transport path, the transport element can be produced in a particularly simple manner. In particular, in this case, the transport element can have substantially the same design, apart from the improvements and arrangements of the holding device described below, i.e. in particular with regard to the support element, the secondary part and the chassis.
As is known per se, the transport elements each have at least one secondary part for magnetically interacting with at least one long stator of the respective transport path. For this purpose, at least one sequence, i.e. a sequence, of permanent magnets and/or electromagnets, in particular non-switched electromagnets, which are generally adjacent in the longitudinal direction of the transport element and are polarized alternately, is mounted on the secondary part, which can be configured, for example, in the form of a carrier plate.
The at least one long stator linear motor can be designed in particular as a synchronous linear motor. In an alternative embodiment, the long-stator linear motor can also be designed as an asynchronous linear motor, wherein at least one permanent magnet and/or a non-switched electromagnet of the secondary part of the transport element and/or an electrically conductive element, for example in the form of a metal plate, of the transport element on which the permanent magnet and/or the non-switched electromagnet is arranged, operate as an electrical conductor for induction by the asynchronous linear motor.
In linear motors, the magnets of the transport element and the magnets of one or more long stators are usually oriented and dimensioned in such a way that the magnets are opposite on both sides of the air gap, with the aim of overlapping the opposite poles as much as possible in a direction perpendicular to the transport direction or the direction of movement and along the air gap, in order to achieve an optimum propulsion. Here, two basic configurations are conceivable for the orientation and relative arrangement of the guide rail(s), the long stator(s) and the secondary part.
In a first embodiment, the guide rail(s), the long stator(s) and the secondary part are arranged such that the air gap existing between the poles of the magnets of the secondary part and the poles of the long stator is oriented substantially perpendicular to the seating plane of the transport system or the container treatment facility. In this "vertical" case, the poles of the magnets of the long stator and of the secondary part, which are usually configured as elongate, are likewise oriented substantially vertically. The same applies to the carrier plate of the secondary part. The plane in which the surface of the long stator facing the secondary part extends (referred to below as the long stator plane) is thus a vertical plane. The direction of movement and the course of the at least one guide rail are here assumed to be substantially horizontal, i.e. parallel to the seating surface. In the case of a double-sided linear motor, the two long stators also extend parallel to one another in a horizontally offset manner, i.e. the corresponding points on the long stators are offset from one another in a horizontal plane.
In a second alternative embodiment, the guide rail(s), the long stator(s) and the secondary part are arranged such that the air gap existing between the poles of the secondary part and the poles of the long stator is oriented substantially parallel to the seating plane of the transport system or the container treatment facility. In this "horizontal" case, the poles of the magnets of the long stator and of the secondary part, which are usually designed to be elongate, are likewise oriented substantially horizontally. The same applies to the carrier plate of the secondary part. In this case, the long stator plane is thus a horizontal plane. The direction of movement and the course of the at least one guide rail are also assumed here to be substantially horizontal, i.e. parallel to the seating surface. However, in the case of a double-sided linear motor, the two long stators now extend parallel to one another in a vertically offset manner, i.e. the respective points of the long stators are offset from one another in a vertical plane.
In both embodiments, the movement of the transport element and of the containers transported by the transport element extends in a horizontal plane. However, it should be understood that the above-mentioned transport path can also comprise ramps, even vertical segments. Accordingly, the relative arrangement of the guide rail, the long stator and the secondary part should be matched to the orientation of the transport path. For the sake of simplicity of description, it is assumed in the following without limitation that the transport path is oriented horizontally. However, it should be understood that the terms "vertical," "parallel," and "horizontal" used hereinafter do not define an absolute frame of reference, but are to be understood with reference to the orientation of the transport path, unless explicitly stated otherwise.
The transport elements can be guided along the respective transport path by means of a control and/or regulating unit, for example in the form of a processing computer. The control and/or regulating unit can be realized here as a central control and/or regulating unit of the long-stator linear motor system and/or can be realized by control and/or regulating units which are arranged discretely on the transport element. By the targeted actuation of the individual electromagnets or individual blocks of electromagnets of the respective long stator in a limited region of the respective transport path, specific transport elements can be accelerated and thus moved in a targeted manner, so that the transport elements can be guided along the transport path individually and independently of the other transport elements.
According to the invention, a group of transport elements for use on two transport paths arranged offset to one another comprises at least one transport element of a first type of construction and at least one transport element of a second type of construction. In the case of more than two transport paths arranged offset from one another, the group accordingly comprises transport elements of a further type of construction. These types of structures are different, wherein the differences as described above may be limited only to the design and arrangement of the holding device as described below. However, the type of construction can also be varied, for example by modification and arrangement of the supporting elements and/or the secondary parts. The group may comprise exactly one transport element per construction type or also more than one transport element for at least one construction type. In particular, as many transport elements can be contained within a group for each structure type.
As is known per se, the transport elements are configured via their secondary parts for individually controlled movement along the respective transport path. The transport elements of the first type of construction are designed for arrangement and movement on a first transport path, and the transport elements of the second type of construction are designed for arrangement and movement on a second transport path.
According to a refinement, the transport elements of the first and second type of construction can be configured such that they are each arranged only on one or more guide elements of the respective transport path. Alternatively, as described in more detail below, the bearing element of the holding device of the transport element of one construction type can be arranged or supported on a guide element of the transport path assigned to the transport element of the other construction type. In particular, the transport paths can be completely spatially separated from one another.
According to the invention, the transport elements of the first and second construction type are configured to be able to counteract the offset between the first and second transport paths in consideration of the position of the container being transported. If more than two transport paths are provided, wherein transport elements of corresponding additional design types are provided, these additional design types differ from the first and second design types in that the corresponding offset of the further transport paths can be compensated in terms of the position of the transported containers. The transport elements of the first and second design types and, if other design types are present, the holding devices for containers, which are associated therewith and which are described below, are therefore configured differently, in particular due to their different design and arrangement, so that the containers transported by them are transported in a common plane. Due to the different configuration of the transport elements, there is therefore no offset between the containers being transported, compared to the transport path. The containers transported by the transport elements of the first and second design types and possibly of the further design types thus form a common container flow. This makes it possible to consistently take over or consistently discharge the containers from the correspondingly provided feeders by the transport elements to the correspondingly provided outfeeders, and to consistently treat the transported containers by means of the container treatment stations arranged on the transport line.
As already mentioned, the transport elements of the first and second type of construction can be constructed identically in construction, apart from the holding devices described below, so that the offset between the first and second transport paths can be compensated by different designs and/or arrangements of the holding devices for the containers associated with the transport elements. Alternatively or additionally, however, the configuration of the transport element itself may also differ, as described above, for example due to the arrangement of the support elements and/or the shape of the frame of the transport element. For example, the transport element of the second type of construction can have a frame which is arranged higher in terms of the bearing on the guide element of the second transport path, so that the holding device of the transport element of the second type of construction is arranged offset perpendicular to the long stator plane with respect to the holding device of the transport element of the first type of construction when the container is transported suspended. Such a deflection of the retaining device can in particular prevent the transport elements from colliding during staggered travel.
According to one refinement, the transport element of the first and second design type can have a first and a second holding device for the at least one container, wherein the first and the second holding device are configured differently such that an offset between the first and the second transport path can be compensated. According to this refinement, the transport elements are each equipped with a holding device for holding one or more containers, for example in the form of a gripping element. The gripping element can be designed in such a way that it can be passively or actively controlled. In particular, a gripping element, for example a so-called neck ring for neck manipulation of plastic bottles, for positive or non-positive gripping of the neck region of the container is conceivable, wherein, with positive gripping, the held container can be supported in the gripping element so as to be rotatable about its longitudinal axis. Furthermore, the gripping element can be configured in a pivotable and/or height-adjustable manner. According to this refinement, the first and second holding devices are configured differently, so that the offset between the first and second transport paths can thereby be compensated for. In particular, as described below, the first and second holding devices may differ in their length and/or depth, wherein the difference is determined by the offset of the first and second transport paths.
According to a further refinement, the transport elements of the first and second construction type can also be configured such that, in the case of an alternating arrangement of the transport elements of the first and second construction type on the first or second transport path, the containers can be transported in the container flow with a pitch which is smaller than the dimension of the transport elements in the transport direction. As already mentioned, the transport pitch or, in short, the pitch of the stream of containers or container packs of the same type is given by the spacing between corresponding points of successive containers or container packs in the transport direction. The so-called alternating arrangement of the transport elements of the first and second type of construction is to be understood here and in the following as meaning that the transport elements of the first and second type of construction are arranged on the first or second transport path with respect to the transport direction in such a way that in the container flow the containers or the container multi-packs are transported alternately by the transport elements of the first type of construction and the transport elements of the second type of construction. Here and in the following, two transport elements are considered to be in immediate proximity one after the other, irrespective of the transport path on which the transport elements are arranged, when the containers or the containers packed in a row transported by these transport elements are in immediate proximity one after the other in the container flow.
If more than two transport paths and a corresponding number of transport elements of the type of construction are provided, the transport elements can be arranged on the respective transport path in such a way that at any point of the processing route, i.e. at that part of the transport path which is used for transporting the containers, two transport elements of identical construction are not immediately adjacent one after the other. In particular, in the case of N transport paths and N construction types, the following sequence of transport elements can be selected by corresponding arrangements on the transport paths, wherein the respective numbers represent the construction types: 1. 2, 3, N-1, N. This sequence is then repeated. Furthermore, the sequence of transport elements can form the set of transport elements described above.
According to this refinement, the transport elements of the first or second type of construction can be configured such that successive transport elements can be approached close to one another along the respective transport path such that the containers transported by them are transported with a pitch that is smaller than the dimension of the transport elements in the transport direction. For this purpose, the transport elements, in particular the holding devices of the transport elements, can be configured such that collision of parts of successive transport elements of the first and second type of construction can be avoided even if the spacing between successive transport elements in the transport direction is smaller than the dimension of the transport elements in the transport direction.
Due to the offset of the transport paths, this can be achieved, for example, in that, in the case of transport paths arranged vertically one above the other, the holding devices of the respectively narrowly configured transport elements of the upper transport path are enclosed between two successive transport elements of the lower transport path. Alternatively or additionally, the holding device of the transport element of the upper transport path can protrude beyond the frame of the transport element of the lower transport path, so that the holding device can travel over the frame of the transport element of the lower transport path.
In the case of a mutually horizontally offset transport path, the holding devices of the first type of construction transport elements can be arranged on one side of the transport elements with respect to the transport direction, while the holding devices of the second type of construction transport elements are arranged on the other side of the transport elements. In this way, the retaining device is enabled to be embedded into the gap between the two transport paths. In this case, the holding device therefore does not differ in its length, but rather by its arrangement relative to the transport element and by the orientation of the holding or gripping element. A plurality of further embodiments of the holding device are conceivable and can be selected depending on the geometric arrangement of the transport path.
According to a particular refinement, the first and second holding devices can be configured for transporting the container in suspension. This does not exclude that further holding elements can be provided as part of the holding device, which further holding elements are, for example, capable of supporting the bottom region of the container. However, at least one holding element is provided, on which the container is suspended at least with part of its weight. For example, a clamp or a neck ring for neck manipulation can be provided as a holding element for the overhead transport of containers, in particular plastic bottles or preforms.
The length of the first and second holding means may differ according to a particular development for the suspension transport of containers. The length of the first and second holding devices is to be understood here and in the following as the dimension of the holding devices in the vertical direction, wherein the length of the respective point of the transport element, for example the horizontal centre line of its secondary part, can be measured. In particular, the difference in length of the first and second holding devices may be a vertical offset of the first and second transport paths. Thereby ensuring that the carried containers are transported in the same horizontal plane.
Alternatively or additionally, the dimensions of the first and second holding devices perpendicular to the vertical plane may be different. According to this refinement, the first and second holding devices therefore differ (also) in their dimensions in the horizontal plane. In particular, the vertical plane may be the long stator plane described above for the vertical case of a long stator linear motor system, wherein the horizontal offset of the two transport paths can be counteracted by the different dimensions of the first and second holding devices. In this case, the difference in the dimensions perpendicular to the vertical plane of the first and second holding devices may in particular be the offset of the first and second transport paths perpendicular to this vertical plane. For the horizontal case of the long stator linear motor system already mentioned, in which the first and second transport paths are horizontally offset from one another, the vertical plane may for example be arranged centrally between the transport paths. Alternative refinements are also conceivable here, in particular by combining horizontally and vertically offset transport paths.
According to a further development, the longer holding device of the first and second holding devices can have at least one bearing element, by means of which the longer holding device can be supported on a guide element, in particular a guide element of a transport path, in which the transport element with the shorter holding device is arranged. The guide element on which the at least one support element of the longer holding device is arranged can thus be a separate guide element, which is arranged, for example, below the lower transport path (in the case of a vertical offset of the transport path). Alternatively or additionally, at least one support element may be arranged on a guide element of the other (lower) transport path. In addition, the shorter holding device can also have at least one bearing element, by means of which the shorter holding device is supported on the guide element. It is to be understood that more than one guide element and correspondingly more than one support element can also be provided for additional support of the longer holding device. For example, one or more of the bearing elements may be support rollers. For example, the additional support of the longer holding device can counteract a larger bending moment on the longer holding device (in the case of passive clamping) when transferring and/or receiving containers or preforms.
The above object is also achieved by a transport system for transporting containers in a container treatment plant, having: a plurality of transport element groups according to one of the preceding developments; a first transport path having at least one first long stator linear motor and at least one first guide element, on which transport elements of a first type of construction are movably arranged; and a second transport path having at least one second long-stator linear motor and at least one second guide element, on which transport elements of a second type of construction are arranged in a movable manner, wherein the first and second transport paths are arranged offset to one another, and wherein the transport elements of the first and second type of construction are arranged alternately on the first and second transport paths in the transport direction.
The same variants and improvements described above in connection with the transport element group according to the invention can also be applied to the transport system. In particular, as described above, the first and second transport paths may be arranged vertically and/or horizontally offset from each other. As mentioned above, the long stator linear motor may be oriented vertically or horizontally. Furthermore, at least one guide element can be provided on which the holding device of the transport element of the first and/or second type of construction can be guided via at least one support element. As mentioned above, the at least one bearing element may be a support roller. In particular, a longer holding device of the transport element can have such a supporting element. In addition, the shorter holding device of the transport element can also have a support element, by means of which the transport element can be mounted on the same guide element. As already mentioned, the first and second transport paths may be identical in structure.
The above object is also achieved by the use of at least one transport element group according to one of the above-described improvements together with a transport system for transporting containers in a container treatment plant, the transport system having: a first transport path having at least one first long stator linear motor and at least one first guide element, on which transport elements of a first type of construction are movably arranged; and a second transport path having at least one second long stator linear motor and at least one second guide element, on which transport elements of a second type of construction are arranged in a movable manner, wherein the first and the second transport path are arranged offset to one another.
The same variants and modifications described above in connection with the transport element group according to the invention can also be used here. In particular, the transport elements can be moved along the first and second transport paths in a controlled manner, for example by means of the above-described control and/or regulating unit of the long-stator linear motor system, so that transport elements of the first and second construction type are arranged alternately in the transport direction. The transport elements of the first and second design type can be brought at least in sections close to one another along the first and second transport paths, so that the containers transported by the transport elements are transported with a pitch that is smaller than the dimension of the transport elements in the transport direction. The dimension of the transport element in the transport direction is understood here in the present disclosure as the largest dimension of the transport element in the transport direction.
By the offset arrangement of the transport paths and the use of differently configured transport elements on different transport paths, a smaller pitch of the transported container flow can be achieved without the need to change the secondary parts of the transport elements. In the case of the use of transport elements of the first and second construction type having the same dimension in the transport direction, the pitch can ideally be reduced to approximately half the dimension. The relative arrangement of the transport elements of the first and second design type corresponds to a half-offset arrangement when laying the tiles. Accordingly, when using transport elements of another type of construction, the pitch can be further reduced. For example, when the transport elements of the first, second and third type of construction are arranged offset by one third, a substantially trisected pitch results. Due to the reduction in pitch, the speed of the transport element can be reduced at the same throughput, whereby the wear of the bearing elements is reduced. Alternatively, a higher throughput of the processing lines or container processing facilities can be achieved due to a greater space occupation, i.e., the number of containers or preforms per processing line. Since it is not necessary to change the secondary part of the transport element, the transport element can be driven with a constant propulsion force.
Drawings
Further features and exemplary embodiments and advantages of the invention are explained in more detail below with reference to the drawings. It should be understood that these embodiments do not exhaustively set the scope of the invention. It should furthermore be understood that some or all of the features described below can also be combined with each other in other ways.
Fig. 1 shows a schematic representation of a transport element guided on one side according to the prior art;
fig. 2 schematically shows a group of transport elements on two transport paths arranged vertically offset from one another according to a first refinement of the invention;
fig. 3 schematically shows a transport element according to a second development of the invention on two transport paths arranged vertically offset from one another;
fig. 4 schematically shows three variants of a transport element according to the first and second construction types of the invention;
fig. 5 schematically shows three variants of the arrangement of the transport elements according to the invention on two, three or four transport paths.
In the drawings described below, like reference numerals denote like elements. For the sake of clarity, identical elements have been described only when they first appear. It should be understood, however, that variants and embodiments of the elements described with reference to one of the figures can also be applied to corresponding elements in the remaining figures.
Detailed Description
An exemplary embodiment of a transport element guided on one side as known from the prior art is shown in fig. 1. The transport element 100 shown here has a secondary part 110 which, as is known per se, carries a sequence of magnets on the side facing the long stator 150, which magnets interact with the electrical windings of the long stator. Since the long stator 150 is arranged only on one side of the transport element 100, the transport element is held on the guide rail 160 arranged on one side via a magnetic attraction between the magnets of the secondary part 110 and the long stator 150 (in particular the iron core of the long stator, not shown). The exemplary illustrated transport element 100 is mounted in a movable manner on one side of the guide rail 160 of the long-stator linear motor via running rollers 106 and guide rollers 105.
However, the transport element can also have running rollers and guide rollers on the side opposite the guide rail 160 in order to be guided on the opposite guide rail in the branching region of the switch part. Accordingly, the secondary part can also have magnets or poles of magnets on both sides. Alternatively, secondary parts, which are each equipped with a magnet on one side, can be provided on both sides of the transport element. In this way, a magnetic interaction with the long stator arranged on the opposite side can take place, in particular in the branching region of the switch part.
The transport element 100 also has a holding device 115 in the form of a clamp with which the bottles can be transported. In the modification shown in fig. 1, the pitch at which bottles can be transported in the container flow is limited by the dimension of the transport element 100 in the transport direction. Although this limitation can be reduced by a specific development of the transport element and its secondary parts, as described, for example, in DE 102015226139 a1, the effective propulsion is reduced.
Fig. 2 schematically shows a group of transport elements on two transport paths arranged vertically offset from one another according to a first refinement of the invention. For a better understanding, the guide rails 160 or 260 of the transport paths 120 and 220, respectively, and the long stators 150 or 250, respectively, are shown only schematically in the figures, arranged vertically offset from one another. Furthermore, in the transport element 100 of the first type of construction, the frame 110 with the secondary parts and the holding device 115 are only schematically illustrated. Accordingly, fig. 2 shows only the frame 210 with the secondary parts and the holding device 215 for the transport element 200 of the second type of construction. For the sake of clarity, it is assumed in the illustrated non-limiting development that the transport paths 120 and 220 and the racks 110 and 210 are structurally identically constructed.
Illustratively, the dimensions of the transport elements 100 and 200 are indicated by X in fig. 2, while the spacing between successive bottles 130 is indicated by Y. Finally, fig. 2 exemplarily shows a further guide rail 170, which is arranged below the lower transport path 120. In particular, the bearing elements of the longer holding device 215 can bear on the guide rail 170 in order to support the longer holding device. In addition, shorter holding devices 115 can also be supported on the guide rail 170 via corresponding bearing elements.
In the modification illustrated in fig. 2, the transport paths 120 and 220 are spatially separated from one another and are offset from one another by a distance L in the vertical direction. To compensate for this offset, the holding means 215 of the transport element 200 of the second type of construction is longer by the same distance L than the holding means 115 of the transport element 100 of the first type of construction. The result is that the containers 130 are held and guided at the same height.
Due to the vertical offset between the transport paths 120 and 220, the transport elements 100 and 200 can be guided in the transport direction in an overlapping manner as illustrated in fig. 2. For this purpose, as shown in fig. 4a and 4b, the transport element and/or its holding device can be configured such that the holding device 215 can travel over the frame 110 of the transport element 100 without collision. Since the transport elements 100 and 200 can thus be guided along the first and second transport paths at a pitch smaller than the dimension X, a pitch Y smaller than the dimension X is also obtained.
Fig. 3 schematically shows a transport element according to a second development of the invention on two transport paths arranged vertically offset from one another. In this refinement, the holding device 215a of the transport element 200a of the second type of construction is of narrow design, so that it can be guided between the frames 110a and 110b of the transport elements 100a and 100 b. Without limitation, in the modification of fig. 3, the holding devices 115a and 115b of the transport elements 100a and 100b are also of narrow design. In the development shown in fig. 3, the holding device 215a is therefore not required to project out of the illustrated drawing plane in order to be guided over the rack 110a or 110 b. It is only required to compensate for the vertical offset of the transport paths 120 and 220 in order to transport the containers 130 in the same transport plane.
Fig. 4 schematically shows three variants of a transport element according to the first and second construction type of the invention. Fig. 4a and 4b can be used here for the modification shown in fig. 1 and 2. The transport paths arranged offset from one another only show the long stators 150 and 250 in fig. 4a and 4b, wherein the vertical center planes of these long stators are respectively indicated by dashed lines. The frames 110 and 210 of the transport elements of the first and second type of construction are also schematically shown. It is to be understood that the simplified development shown is not limited in terms of the manner of support of the transport elements, the development of the secondary part and the arrangement and shape of the holding device, but merely to demonstrate how the offset of the transport path can be compensated for by different configurations of the transport elements of the first and second type of construction and to avoid collisions of the transport elements in the case of guidance with reduced pitch as shown in fig. 2 and 3.
In the variant of fig. 4a, the long stators 150 and 250, and thus the first and second transport paths, are arranged vertically offset from each other only. In order to be able to achieve the overlap between the holding device 215 and the frame 110 shown in fig. 2, the frame 210 of the transport element of the second type of construction is configured in the variant shown to have a greater height than the frame 110 of the transport element of the first type of construction. This can be achieved, for example, by a correspondingly configured support element and/or a suspension of the support element. In other words, in this variant, the points on the racks 110 and 210 at which the holding devices 115 and 215 are arranged are offset by a distance H perpendicular to the vertical plane indicated by the dashed line. In order for the containers 130 to also be guided in the same vertical plane, the longer holding device 215 has a dimension perpendicular to this vertical plane that is configured to be shorter than the holding device 115. It is to be understood that even in the case of the variant of fig. 4a, the air gap between the long stator and the secondary part of the transport element can be the same for both transport paths by a corresponding configuration of the transport element. According to the variant illustrated in fig. 4a, the dimensions perpendicular to the vertical plane of the first and second holding devices are therefore different.
This also applies to the holding devices 115 and 215 of the variant of fig. 4 b. However, unlike the arrangement in fig. 4a, the long stators 150 and 250 are not arranged in the same vertical plane, but are offset from each other by a distance H in the horizontal direction, i.e. perpendicular to the vertical direction and the transport direction. As shown in fig. 4b, in case the arrangement is a transport path of the same structure horizontally and vertically offset from each other, the transport elements 100 and 200 can be designed with identical frames 110 and 210, thereby simplifying the manufacturing of the transport elements. The horizontal offset H automatically translates into a corresponding offset for the holding devices 115 and 215. To counteract the horizontal offset, the dimension of the second holding device 215 perpendicular to the vertical plane illustrated by the dashed line is reduced by the offset H of the first and second transport paths relative to the dimension of the first holding device 115. The difference in the length of the retaining devices 115 and 215 is again the vertical offset of the transport path.
An exemplary variant is schematically illustrated in fig. 4c, where the long stator planes of the long stators 550 and 650 are horizontal planes (indicated by dashed lines). In this non-limiting modification, the frames 510 and 610 of the transport elements of the first and second type of construction run over the long stators 550 and 650. The first and second transport paths are therefore arranged offset from one another only in the horizontal direction. Nevertheless, the container 130 can still be transported in the same transport plane by arranging the holding devices 515 and 615 of the transport elements of the first and second type of construction on different sides of the transport element, as shown in fig. 4 c. Dimension H perpendicular to the vertical plane of the first holding device 5151Again different from the corresponding dimension H of the second retention device 6152So that the guidance of the containers 130 in the same vertical plane can be achieved. In the variant shown here, the holding devices 515 and 615 therefore do not differ in terms of their length, but in terms of their depth relative to the vertical plane and their arrangement on the transport elements of the first and second type of construction.
Depending on the development and arrangement of the transport path, a plurality of further embodiments of the transport element and the holding device are conceivable.
FIG. 5 schematically shows a device according to the inventionThree variants of the arrangement of the transport elements on two, three or four transport paths. Fig. 5a shows the variant of fig. 2 and 3 with two transport paths, namely two long stators 150 and 250. The frames 110 and 210 of the transport elements of the first and second type of construction are each arranged here offset from one another by approximately half the dimension of the transport element in the transport direction. The respective control of the transport elements of the first and second construction type can be achieved by a respective individual control of the transport elements along the first and second transport paths by means of a per se known control and/or regulating unit of the long stator linear motor system. Fig. 5a also shows exemplary three groups of transport elements, each having a first type of structure and a second type of structure. The transport elements of the first type of construction and the transport elements of the second type of construction are arranged alternately on the first or second transport path by means of corresponding guides. This results in a half-staggered arrangement of the transport elements of the first and second type of construction, whereby the pitch Y can be adjusted1To about half the size of the transport element.
In the variant of fig. 5b, a further transport path with the associated long stator 350 is arranged vertically offset above the second transport path, wherein transport elements 310 of the third type of construction are arranged on this third transport path. The transport element of the third design type differs from the transport element of the first design type and the transport element of the second design type in particular by the length of the holding device (not shown) for the containers. Fig. 5b shows two transport element groups, each having one transport element per construction type. In order to achieve a minimum transport pitch Y corresponding to approximately one third of the dimensions of the transport element2According to this variant, the transport elements of the first to third type of construction are arranged offset by one third on the transport path.
Finally, a fourth transport path with an associated long stator 450 and an associated transport element 410 of a fourth design type is added to the variant of fig. 5 c. In this case, the first to fourth structure types are correspondingly arrangedThe transport elements are arranged in a quarter-staggered manner, enabling a minimum transport pitch Y3。
The shown and described development makes it possible to achieve a container flow pitch that is significantly smaller than the dimension of the transport element in the transport direction without reducing the secondary parts of the transport element. Thus, it is possible to reduce the transport speed and/or to increase the throughput of containers without reducing the propulsive force of the individual transport elements. Furthermore, by additionally supporting a longer holding device on the correspondingly arranged guide element, it is also possible to counteract larger bending moments of the container or preform when it is transferred and/or received. The support element of the holding device can act on the guide element on one or both sides in order to counteract corresponding forces when the containers or preforms are transferred or received.
Claims (15)
1. Group of transport elements (100, 200; 100 a-b, 200a) for a long-stator linear motor system having at least two transport paths (120, 220) arranged offset to one another, each having at least one long-stator linear motor (150, 250) and at least one guide element (160, 260),
wherein the transport elements are each designed for transporting at least one container (130), in particular a bottle or a preform, and each have at least one secondary part (110, 210) for magnetically interacting with the long-stator linear motor,
it is characterized in that the preparation method is characterized in that,
the group comprises at least one transport element (100; 100 a-b) of a first type of construction and at least one transport element (200; 200a) of a second type of construction for a single controlled movement along a first or a second transport path (120, 220) of transport paths arranged offset to one another, and
wherein the transport elements of the first and second construction type are configured differently such that an offset between the first and second transport paths can be offset in consideration of the position of the transported containers.
2. A set of transport elements according to claim 1, wherein the transport elements of the first and second construction type have a first or second holding device (115, 215; 115 a-b, 215a) for at least one container, wherein the first and second holding device are configured differently such that an offset between the first and second transport path can thereby be counteracted.
3. Set of transport elements according to claim 1 or 2, wherein the transport elements (100, 200; 100 a-b, 200a) of the first and second structure type are further configured such that, with the transport elements of the first and second structure type arranged alternately on the first or second transport path (120, 220), the containers (130) can be transported in a container flow with a pitch smaller than the dimension of the transport elements in the transport direction.
4. A transporting element group according to claim 2 or 3, wherein the first and second holding means (115, 215; 115 a-b, 215a) are configured for suspension transport of the container (130).
5. A set of transporting elements according to claim 4, wherein the difference in length of the first and second holding means (115, 215; 115 a-b, 215a) is in particular the vertical offset of the first and second transporting paths (120, 220).
6. The transport element group according to claim 4 or 5, wherein the difference in the dimensions of the first and second holding means (115, 215) perpendicular to the vertical plane is in particular the offset of the first and second transport paths (120, 220) perpendicular to the vertical plane.
7. The transport element group according to claim 4 or 5, wherein the longer holding device (215) of the first and second holding devices (115, 215) has at least one bearing element by means of which the longer holding device can be supported on a guide element (170), in particular a guide element of a transport path in which transport elements with shorter holding devices are arranged.
8. A transport system for transporting containers (130) within a container processing facility, the transport system comprising:
a plurality of sets of transport elements (100, 200; 100 a-b, 200a) according to any one of the preceding claims,
a first transport path (120) having at least one first long-stator linear motor (150) and at least one first guide element (160), on which transport elements (100; 100 a-b) of a first type of construction are arranged in a movable manner, and
a second transport path (220) having at least one second long-stator linear motor (250) and at least one second guide element (260), on which transport elements (200; 200a) of a second type of construction are arranged in a movable manner,
wherein the first and second transport paths are arranged offset to one another, and
wherein the transport elements of the first and second construction type are arranged alternately on the first or second transport path in the transport direction.
9. Transport system according to claim 8, wherein the first and second transport paths (120, 220) are arranged vertically offset from each other.
10. Transport system according to claim 8 or 9, wherein the first and second transport paths (120, 220) are arranged horizontally offset from each other.
11. Transport system according to one of claims 8 to 10, further having a guide element (170) which is able to guide the holding device (215) of the transport element of the first and/or second type of construction via at least one support element.
12. Transport system according to any one of claims 8 to 11, wherein the first and second transport paths (120, 220) are identical in structure.
13. Use of at least one group of transport elements (100, 200; 100 a-b, 200a) according to any one of claims 1 to 7 together with a transport system for transporting containers (130) within a container processing facility, the transport system having: a first transport path (120) having at least one first long-stator linear motor (150) and at least one first guide element (160), on which transport elements (100; 100 a-b) of a first type of construction are arranged in a movable manner; and a second transport path (220) having at least one second long-stator linear motor (250) and at least one second guide element (260), on which transport elements (200; 200a) of a second type of construction are arranged in a movable manner, wherein the first and second transport paths (120, 220) are arranged offset to one another.
14. Use according to claim 13, wherein the transport elements (100, 200; 100 a-b, 200a) are moved in a controlled manner along the first and second transport paths (120, 220) such that transport elements of the first and second construction type are arranged alternately in the transport direction.
15. Use according to claim 14, wherein the transport elements (100, 200; 100 a-b, 200a) of the first and second construction type are brought closer to each other at least in sections along the first and second transport paths (120, 220) such that the containers (130) transported by the transport elements are transported with a pitch that is smaller than the dimension of the transport elements in the transport direction.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019126615.7 | 2019-10-02 | ||
| DE102019126615.7A DE102019126615A1 (en) | 2019-10-02 | 2019-10-02 | Linear transport system with minimal transport division |
| PCT/EP2020/076391 WO2021063742A1 (en) | 2019-10-02 | 2020-09-22 | Linear transport system with minimal transport spacing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114502491A true CN114502491A (en) | 2022-05-13 |
| CN114502491B CN114502491B (en) | 2024-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080069290.9A Active CN114502491B (en) | 2019-10-02 | 2020-09-22 | Linear transport system with minimum transport pitch |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4037999A1 (en) |
| CN (1) | CN114502491B (en) |
| DE (1) | DE102019126615A1 (en) |
| WO (1) | WO2021063742A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112019007676T5 (en) * | 2019-08-27 | 2022-06-15 | Mitsubishi Electric Corporation | linear motor system |
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| FR2834707B1 (en) * | 2002-01-14 | 2004-03-12 | Didier Butor | CONVEYOR OF CONTAINERS WITH LINEAR MOTOR |
| DE102013218389B4 (en) | 2013-09-13 | 2023-01-12 | Krones Ag | Device and method for switching a passive switch for transport systems with linear motors |
| EP2980010B1 (en) * | 2014-07-31 | 2017-08-30 | Sidel S.p.a. Con Socio Unico | Plant for filling and capping of containers |
| DE102015226139A1 (en) | 2015-12-21 | 2017-06-22 | Krones Ag | Linear transport system with minimal transport division |
| DE102017223078A1 (en) * | 2017-12-18 | 2019-06-19 | Krones Ag | Apparatus for treating containers |
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2019
- 2019-10-02 DE DE102019126615.7A patent/DE102019126615A1/en active Pending
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2020
- 2020-09-22 EP EP20775865.7A patent/EP4037999A1/en active Pending
- 2020-09-22 CN CN202080069290.9A patent/CN114502491B/en active Active
- 2020-09-22 WO PCT/EP2020/076391 patent/WO2021063742A1/en unknown
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| JP2000296770A (en) * | 1999-04-14 | 2000-10-24 | Nippon Steel Corp | Suspension carrier device for extension/contraction carrying article |
| DE10017739A1 (en) * | 2000-04-11 | 2001-10-18 | Sundwig Kohler Gmbh | Device for hanging transport of flat workpieces |
| CN103523679A (en) * | 2013-10-14 | 2014-01-22 | 华电重工股份有限公司 | Container loading and unloading system with double-layer sea-crossing trestle bridge |
| DE102014214696A1 (en) * | 2014-07-25 | 2016-01-28 | Robert Bosch Gmbh | Device for transporting a container relative to a filling station |
| CN106660648A (en) * | 2014-07-25 | 2017-05-10 | 罗伯特·博世有限公司 | Conveying arrangement |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114502491B (en) | 2024-03-08 |
| DE102019126615A1 (en) | 2021-04-08 |
| EP4037999A1 (en) | 2022-08-10 |
| WO2021063742A1 (en) | 2021-04-08 |
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