EP3781463A1

EP3781463A1 - Conveyor system and method for controlling such a conveyor system

Info

Publication number: EP3781463A1
Application number: EP19719449.1A
Authority: EP
Inventors: Herbert Schulze
Original assignee: Pentanova Cs GmbH
Current assignee: Pentanova Cs GmbH
Priority date: 2018-04-20
Filing date: 2019-04-12
Publication date: 2021-02-24
Also published as: WO2019201798A1; CN112292308B; CN112292308A; US20210114636A1

Abstract

A conveyor system (10) has a conveyor section (12), at least one first moving trolley (14, 14'), which carries along a dedicated drive (44) and is movable with the latter along the conveyor section (12) and which has a first trolley parameter (BL), and a controller (30, 46) which, taking into consideration the first trolley parameter (BL), triggers various actions with the aid of waypoints (60, 62, 66, 68) along the conveyor section (12). For more flexible use of the conveyor system, at least one second moving trolley (14, 14") having a second trolley parameter (NL) differing from the first trolley parameter (BL) is provided, and the controller (30, 46) is designed to place at least one waypoint (66, 68) along the conveyor section (12), at which waypoint a certain action is triggered, for the second moving trolley (14, 14") at a different position along the conveyor section (12) than for the first moving trolley (14, 14').

Description

Conveyor system and method for controlling such

cross-references

The following application is closely related to the application DE 10 201 8 109 584 of April 20, 2018, the content of which is hereby incorporated by reference into the content of the present application.

BACKGROUND OF THE INVENTION

1. Field of the invention

The invention relates to a conveyor system with a) a conveyor line, b) at least a first vehicle, which carries its own drive and with this along the conveyor section is movable and having a first car parameters, and c) a control, taking into account the first car parameter triggers various actions using waypoints along the conveyor line.

The invention further relates to a method for controlling such a conveyor system.

2. Description of the Prior Art Conveyors are known from the prior art, in which the Förderstre bridge composed of different sections. Thus, rail systems, such as, for example, a single-rail floor track, are known in which various straight rail sections, curved rail sections as well as driving course branches and course combinations as well as mobile rails are used. Curved sections may be provided for a change in the direction of movement of the trolley in the vertical and / or horizontal direction.

Furthermore, the driving course branches offer the trolley different sections from one another after leaving the branch. Driving course merges, on the other hand, offer the possibility of driving from different sections of the route to a common section of the route.

Such conveyor systems serve, for example, to transport workpieces in at least part of a larger production facility. Such a part of a production plant for workpieces can be, for example, a production area, a surface treatment area, a storage area, an assembly area, a control area and / or a connection area between other parts of the production facility.

Here, the conveyor system may have a pure transport function of the workpieces between two areas. However, it is also possible that the conveyor system moves the workpieces through a process step within the areas. The carriages are therefore partially stopped at certain stations, so that a corresponding process step at the work piece can be performed.

In order to follow the course of the route and in particular a rail, the carriages have a chassis with a drive entrained, for example in the form of a friction wheel. Furthermore, such a chassis can have further guide elements, such as guide rollers.

The drive usually includes an electric gear motor, the energy supply via sliding lines along the conveyor line or entrained energy storage, such as batteries, gas cylinders and / or capacitors is ensured. Inductive energy concepts are known. The control of such a conveyor system via a so-called Anlagensteue tion. In doing so, the complex processes of the entire production plant are broken down into smaller logical units in accordance with the principle of "divide and rule". So too the design of the conveyor system. Therefore, concepts are known in which the plant control the carriage only indicates goals to which they should drive, and the Fahrwa conditions own own car controls carry, which conditions the movement of the Fahrwa conditions, in particular their driving speeds. For example, driving speed changes of the carriages are required if they pass through a curve region of the conveyor line. Because compared to a straight conveyor line can sometimes act higher mechanical loads on the chassis of the car.

It may also be necessary for the carriages to stop temporarily at certain points on the conveyor. This may be necessary, for example, at the corresponding processing and / or treatment areas. Also, the switching of track changing facilities may require a short stoppage of the car.

Such an action as changing the driving speed or stopping the trolley thus takes place as a function of the position of the trolley along the conveyor track.

Usually are therefore given to such conveyors along the route way points at which certain actions are triggered.

The waypoints can be provided as physical switches, which, for example, switch a vehicle into a slow driving speed in front of a curved route. Typically, however, the waypoints are provided virtually by the system control. For this purpose, for example, the carriages carry a reader, with wel chem position encodings along the conveyor line can be read. The Anlagensteue tion then specifies as a waypoint a specific position along the conveyor line.

The position of the waypoints along the conveyor line is determined during the design of the conveyor. The location of the waypoints depends largely on the action to be triggered, the speeds provided at the waypoint and / or the other structural requirements. Above all, however, the location of the waypoints depends on car parameters of the vehicles used in the conveyor system. In a conveyor system, for example, carriages of the same length are always used. In the design of the conveyor system and the implementation of the system control, for example, depending on the used trolley, a waypoint in front of a switch is set to a position matching the length of the trolley.

The arrangement of waypoints is thus in the conception of the conveyor ge according to the requirements of the production plant and especially the technical properties th, that is the car parameters, the selected type of vehicle, which will be used in the system set.

This initially planned arrangement is then corrected in a Vorbetriebsphase usually still within very narrow limits chen chen to Errei a maximum of the system throughput. Trolleys with different car parameters can not be used in such conveyors or only very limited.

SUMMARY OF THE INVENTION It is therefore an object of the invention to provide a conveyor system which is more flexible with regard to the use of different carriages.

This is inventively achieved by a conveyor system of the type mentioned, in which d) at least a second carriage with a second car parameters, which deviates from the first car parameters, is provided, and e) the controller is set to at least one waypoint along the För derstrecke , on which a certain action is triggered to set for the second Fahrwa gene at a different position along the conveyor line than for the Ers th carriage. The inventor has recognized that it can sometimes be useful to the waypoints that are ent long the conveyor line to trigger for various actions, depending to use the incoming trolley and that if on one and the same För deranlage vehicles with different car parameters must be driven.

This is especially the case when a towing method as described in the still unpublished DE 10 2018 109 584.8 is used. In this lied carriage are cut from other vehicles from inaccessible Streckenab moved out.

By the present invention, the resulting trolley can still be reliably moved through the Förderstre bridge with a deviating from normal operation car parameters. For the remaining vehicles nothing changes with regard to the waypoints.

The position of the waypoint for the second carriage may be permanently provided at one of their position as the waypoint for the first carriage.

Thus, for example, the two waypoints for the first and the second Fahrwa conditions be mounted at different positions along the conveyor line, but in each case act only on the first or the second carriage or the two vehicles can respond only to one of the two waypoints , For example, in each case two different stop waypoints for the two carriages may be provided in front of a route changing device such as a switch or the like.

The waypoints can also be offset only when needed in the controller. This can for example only happen in the case of an existing actually in the conveyor section two th trolley, so that the waypoints for the corresponding actions quasi just temporarily for the trolley with a different car parameters who the.

The specific action is an action that is similar for both the first vehicle and the second vehicle. In particular, the particular action is a speed change, a stop at a stop point, and / or a route release. It is preferably provided that the first and second carriage parameters are a carriage length, a mass, a maximum acceleration, a speed and / or a functional length of the carriages.

Among the car parameters, in which the first and the second carriage differ, are first of all such parameters to understand, which influence the Fahrverhal th the carriage. In particular, however, the relevant parameters are the parameters mentioned. Under the maximum acceleration can be understood both the acceleration and deceleration.

The functional length is a virtually predetermined by the control length, which specifies a sufficient minimum distance between two Fahrwa conditions in normal operation, the speed influenced during cornering and / or specifies a not agile stop distance to a guideway change device. Typically, conveyors are designed based on such a functional length of the car.

Often, the functional length is also given by the maximum length of the workpieces to be conveyed and / or the maximum carriage length. However, surcharges for safety distances can also be included in the functional length.

Preferably, it is provided that the second carriage parameter of the second vehicle deviates from the first vehicle parameter of the first vehicle due to a coupling of two carriages. By coupling two carriages, for example, extends the length of function, which can then be considered according to the invention by the staggered waypoints for Ausfüh tion of actions in the controller.

When two carriages are coupled, a separating device may preferably be used, with which the power flow between the drive and the conveying path is interrupted on a carriage. The drive then takes place via the other coupled carriage. This creates a trolley train of two coupled carriages, depending on whether pushed or pulled, only the drive of the rear or before the car is used. Preferably, it is provided that one of the two coupled carriages is a due to a technical defect lying by carriage.

In this way, a stalled cart can be towed. Towing can include both pushing on and pulling on the flank of the lying-down vehicle.

Frequently fall on the carriage from the entrained carriage control. Therefore, it may be advantageous to use the still functional drive of a stopped trolley by coupling to this an energy transmission connection is made for example by means of rigid and / or movable electrical contacts on the two vehicles. Advantageously, at least one of the electrical con tacts is spring loaded. The electrical contact can be made with or without mechanical coupling of the vehicles.

Further, it is advantageous for the electrical coupling when relative movements of the driving carriage to each other by the electrical connection can be at least partially compensated without the connection is disconnected. If the electrical connec tion is made, this is determined by a pilot contact and the case of this sturgeon provided for components can be used. For example, each carriage can be equipped with a switching unit which, in the event of a fault, electrically isolates the drive motor and the electric brake from the traveling carriage from its power supply components via an external signal and / or an external power supply from the towing vehicle and instead with the electrical components of the towing vehicle Trolley connects.

It is preferably provided that one of the two coupled carriages is a towing car. In principle, all carriages can be configured as trolleys, so that a trolley lying on the ground can be towed by another tram. A separate tow truck whose construction is different from the other However, it can be advantageous. Thus, the tow truck can have a shorter car length, so that the functional length of the two coupled carriages differs only slightly compared to the functional length of a trolley. This may be relevant for converters or lifting stations, for example. The other trolleys with their workpieces can also remain in the normal process sequence.

The tow truck can also be configured as a mobile unit that can be set by Bedienperso signal at any accessible to the operator's point of the conveyor line to get out a left trolley from an inaccessible area. As a result, only a smaller portion of the conveyor line for towing the abandoned trolley must be made free.

Preferably, it is provided that the controller is set up so that the specific action performed at the waypoint also takes into account the deviation of the second car parameter from the first car parameter.

For example, the speed of two coupled carriages before a curve section not only earlier but also be reduced more. In general, the action at the offset waypoint can therefore take into account, in particular, the reduced maximum acceleration and braking values, the increased functional length, the reduced speed and / or the increased mass. For example, a vehicle may have a parameter memory for its own car parameters, which are changed in the case of the towing situation.

Preferably, it is provided that the two carriages carry a trolley controller with a waypoint memory and a device for detecting the own position along the conveyor line and the second trolley stores in the waypoint memory another waypoint for the specific action. In this case, the trolley control can each receive individual waypoints from the parent control of the conveyor to which the trolleys then move. In this case, the controller transmits to the second carriage another waypoint for the particular action than to the first vehicle. However, it can also be stored in the waypoint memory various sets of waypoints, which are then used by either the first carriage or the second driving carriage.

Alternatively, the trolley controller may include at least one offset value that generates the waypoints from the waypoints of the first vehicle from the second vehicle. The offset value can in turn take into account the deviating carriage parameter.

Also, the trolley control can be made less intelligent by the data from the reader are constantly transmitted to the higher-level control of the conveyor, so that the specific action is triggered at a waypoint of this control. The information about the different waypoints for the first and the two th carriage is thus deposited only in the higher-level control. Preferably, it is provided that the offset waypoint leads to the application of emergency driving parameters on the second carriage.

Preferably, it is provided that a carriage with different car parameters this tells the controller and / or the other carriage.

In this way, the controller, for example, due to an increased func onslänge or insufficient driving force for two vehicles lock certain sections of the conveyor line for this vehicle.

With regard to the method, the object of the invention with a method for the control of the aforementioned conveyor system is achieved with the following steps:

Providing at least one second truck with a second truck parameter that deviates from the first truck parameter;

Setting at least one waypoint along the conveyor line, at which a certain action is triggered, for the second carriage at a different position along the conveyor line than for the first carriage.

Preferably, the following steps are still provided: For towing a due to a technical defect, especially in egg nem hard to reach for operating personnel section of the conveyor line are left dumper dock another trolley to the lying remains cart, making the second carriage is realized; - Driving the second trolley, taking into account the offset waypoint.

In this way, left-behind vehicles can be towed.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the invention will be explained in more detail with reference to the drawings. FIG. 1 shows a schematic plan view of a conveyor system with a conveyor line which comprises various sections and branches;

Figure 2 is a side view of a portion of the conveyor line, in which several För coaches are shown in their normal operating distance;

Figure 3 is a side view corresponding to Figure 2, but with two of the trolleys shown coupled together;

Figure 4 is a side view of the conveyor line in the area in front of a switch with a För coaches, which moves to two waypoints to control its drive to be;

Figure 5 is a side view of Figure 4, wherein the trolley is at the first of the waypoints;

Figure 6 is a side view of Figure 4, wherein the trolley is located on the second of the two waypoints;

Figure 7 is a side view of Figure 4, wherein two coupled trolleys on two

Move waypoints that are placed in comparison to the two waypoints of Figu ren 4 to 6 further upstream of the switch; Figure 8 is a side view of Figure 7, with the coupled trolleys located at the first of the two advanced waypoints;

Figure 9 is a side view of Figure 7 with the coupled trolleys at the second of the two advanced waypoints; Figure 10 is a side view of Figure 7 showing a truck to which a tow truck approaches;

Figure 1 1 is a side view of Figure 10, wherein the tow truck was coupled to the Förderwa gene;

Figure 12 is a side view of Figure 10, wherein the tow truck on the second

Waypoint that has been moved downstream.

DESCRIPTION OF PREFERRED EMBODIMENTS

In Figure 1, a generally designated by the reference numeral 10 conveyor system is shown with egg ner conveyor section 12 and a plurality of trolleys 14 at different positions along the conveyor line 12.

The conveyor line 12 comprises various sections which show in the plan view roughly two nested circuits between which the trolleys 14 and conveyed by these workpieces, here exemplified bodies 1 5, with the aid of several switches 16 as Fahrwegänderungseinrichtungen back and forth.

To illustrate what the invention is particularly helpful, Figure 1 shows in the middle a Stre ckenabschnitt the conveyor section 12, which represents a hard to reach for operating area, which should be here by way of example a painting booth 18. Because within the La ckierkabine 18, the trolley 14, as will be apparent later with reference to the other figures, performed below a separating floor and the bodies 15 above the Trennbo dens. About the two switches 16 before and after the spray booth 18, the tram 14, in which the promoted bodies 15 are not to be painted, are performed on a 20 ° to go line, which runs parallel to the spray booth 18.

In the lower part of FIG. 1, a maintenance section 22 of the conveyor line branching off from the main line can be seen in which trolleys 14 are usually serviced and / or parked without a body 15 being conveyed.

In the upper area of FIG. 1, by way of example, an empty bumper 24 is shown, in which trolleys 14, including the bodies 15, can be buffered.

Furthermore, a converter 26 is shown along the conveying path 12 (top right in FIG. 1), with which the conveying carriages 14 are transferred to another transport plane, for example for further assembly of the motor vehicle. Also in the converter 26 is a section of the conveyor line 12, which is difficult to access for operating personnel.

Finally, the conveyor line 12 includes connections 28 to other conveyor systems of a higher-level overall production plant.

For controlling the conveyor system 10, a system controller 30 is provided which can communicate with the trolley 14 by way of example via a wireless communication link 32. Alternatively or additionally, 10 communication lines are used along the conveyor line 12 for communication with the trolley 14, especially in a rail as shown here ge showed conveyor system.

In addition, the system controller 30 via a communication link 34 with the production facilities, here the paint booth 18 and their Arbeitskomponen th as the painting robots, connected. The production plants typically have their own individual controls, which receive only higher-level commands from the plant controller 30 and internally control the appropriate movement, for example, of the painting robots. Finally, the system controller 30 is connected via a communication link 36 to the conveyor line 12, ie in particular to the switches 16 arranged along the conveyor line 12 and / or other actuators and sensors influencing the route. In FIGS. 2 and 3, a section of the conveying path 12 in the painting booth 18 is shown in a sectional view.

Of the paint booth while only a separating tray 38 is shown, which separates a driving space in which the trolley 14 move, from the cabin, in which the Ka rosserien 15 are performed. For this purpose, the separating base 38 has a longitudinal gap through which supporting rods 39 of the trolleys 14 protrude.

First, it can be seen that the conveying path 12 is predetermined by a running rail 40, along which a trolley 14 moves with the conveyed body 15. For this purpose, the trolley 14, a chassis 42, which has its own drive 44, with which the tram can move its own power along the rail 42.

To control the drive 44, the trolley 14 also carries a trolley controller 46, which reads with a reader 48, for example, attached to the rail 42 bar codes or other markings to determine the position of the trolley 14 along the route 12. For the details of an exemplary barcode positioning system, reference is made to DE 10 2012 010 677 A1.

Further, the carriage 14, a separator 50, with which the frictional connection between the drive motor 44 and the conveyor section 12 can be separated by Actuate transmission elements 52, 54 are operated at the front and / or rear end of the trolley. Typically, the power flow is interrupted at a transmission of the drive. For the details of the design of the separator 50 reference is made to the hitherto still unpublished DE 10 2018 109 584 of the applicant.

As shown in Figure 3, the separating device 50 can be used to tow a lying gene trolley 14 'with another trolley 14. For this purpose, as shown in FIG. 3, the following trolley 14 travels on the trolley 14 'which remains lying, whereby the separating device 50 is actuated. In addition, a coupling of the two cars can be done. The drive 44 of the stopped trolley 14 'is now virtually idle, so that the subsequent trolley 14 forms a coupled trolley with the trolley 14' which has remained lying.

Often, a trolley 14 'remains lying, as an electrical component fails. Therefore, it may be advantageous if at the same time an electrical bypass contact is made during coupling, with the towing trolley 14, for example, can perform a diagnosis or still functioning sensors, such as a front distance sensor, the damaged trolley 14 'can use ,

The controller 30 may know a trolley 14 'which has been left behind, for example, because a distance sensor on the following trolley 14 recognizes a drop below a safety distance and reports this to the controller 30. Sen sorik along the conveyor line 12 may report that an expected trolley 14 has not arrived at a sensor position within a predetermined time. The controller 30 may then issue an order to drive onto the stopped trolley 14.

After successful coupling sets the controller 30, where the lingering tram 14 'must be driven and prepares the appropriate Fahrwegände devices. Also, the controller 30 may inform the rest of the process control of the failure of the two Forderwagen.

By the coupling of the two trolleys 14 and 14 'changed for the movement of the still functioning trolley 14 relevant car parameters. By way of example, a carriage parameter is its functional length in normal operation BL (see FIG. 2), which increases as a result of the coupling to a functional length in emergency mode NL (see FIG. As discussed below, the car parameters play an important role in the control of the conveyor system 10.

FIGS. 4 to 6 show a section of the conveying path 12 in front of a switch 16. To control the conveyor system 10, the system control 30 of the Fahrwagensteue tion 46 waypoints before reaching certain actions are performed.

These waypoints are virtual waypoints, which are defined in the system control 30 and are defined in the design of the conveyor system 10 in the design of the conveyor line 12.

Thus, in FIGS. 4 to 6, with a predetermined service brake clearance BBA in front of the switch 16, a braking waypoint 60 and somewhat downstream along the conveying route 12, a stop waypoint 62 is arranged in the operating stop distance BSA. All waypoints, i. The braking waypoint 60 and the stopping waypoint 62 are also adapted to the functional length in normal operation BL of the trolleys 14.

In Figure 5, the trolley 14 has reached the braking waypoint 60, which device from the reading 48 of the trolley control 46 is detected. Due to a previous specification by the system controller 30, the trolley controller 46 reduces the travel speed of the trolley 14 at this position. In FIG. 6, the trolley 14 has reached the stop waypoint 62 at a slower speed, which in turn is recognized by the reader 48. In this position, the trolley 14 stops and waits until the switch 16 holds the right track.

Due to the fact that the function length BL was taken into account in the design of the conveyor system 10 and the setting of the braking waypoint 60 and stop waypoint 62, the trolley 14 just stands so that its front end just does not project into the switch 16.

In FIGS. 7 to 9, the same section of the conveyor line 12 is shown in front of a switch 16. However drives here a coupled team of a tram 14 and egg nem left trolley 14 'to the switch 16 to. For this emergency driving situation, the control 30 of the trolley control 46 of the trailing trolley 14 has passed other waypoints (see Figure 7). And because of the increased functional length in emergency mode NL, an emergency brake Waypoint 66 offset to an emergency braking distance NBA upstream. Likewise, an emergency stop waypoint 68 has been displaced upstream.

In this way, the combination of the two trolleys 14 and 14 'as shown in FIG. 9, in spite of its greater functional length NL, also optimally comes to a standstill in front of the switch 16.

For the following on the team tram 14 apply again the braking waypoint 60 and the stop waypoint 62, so that the waypoints were virtually only temporarily offset WUR.

In the figures 10 to 12, the section of the conveyor line 12 is shown in front of the switch 16 again.

However, a specially designed tow truck 14 "is used here, which is significantly shorter than the trolleys 14 and is not intended to convey workpieces, and the tow truck 14" can be configured as a mobile deployment implement by operators at any point on the runway can be used. If the tow truck 14 "lacks the necessary weight to transmit a sufficient drive force, spring-loaded pinch rollers may be provided for the drive 44.

10, the tow truck 14 "moves from the right to the trolley 14 'which has been left lying in. In this case, the trolley 14 is not pushed but towed for towing.

In the coupled state, the combination of lying trolley 14 'and tow truck 14 "has an insignificantly extended functional length in emergency mode NL compared to the functional length in normal operation BL.

As can be seen in FIGS. 1 and 12, the controller 30 moves the emergency braking waypoint 66 to an emergency braking distance NBA downstream of the original position since the reading device 48 is further forward in the vehicle than on a normal vehicle 14 the emergency stop waypoint 68 has been displaced downstream. In addition, since the tow truck 14 "may cause less deceleration than other trolley parameters than a trolley 14, the emergency brake distance NBA will be further ahead of the emergency stop waypoint 68.

Claims

1 . Conveying system (10) with a) a conveying path (12), b) at least one first carriage (14, 14 '), which leads its own drive (44) and with this along the conveying path (12) is movable and a first Wagenparameter (BL), and c) a controller (30, 46), taking into account the first car parameter (BL) by means of waypoints (60, 62, 66, 68) along the conveyor line (12) causes ver different actions, characterized characterized in that d) at least one second carriage (14, 14 ") is provided with a second carriage parameter (NL), which deviates from the first carriage parameter (BL), and e) the controller (30, 46) is arranged to at least one waypoint (66, 68) along the conveyor line (12), at which a certain action is triggered to set for the second carriage (14, 14 ") to another position along the conveyor line (12) than for the first carriage (14, 14 ').

2. Conveying system according to claim 1, characterized in that it is at the first and second car parameters (BL, NL) to a car length, a mass, a maxi male acceleration, a speed and / or a functional length (BL, NL) of the vehicle (14, 14 ', 14 ").

3. Conveying system according to one of the preceding claims, characterized in that the second car parameters (NL) of the second trolley (14, 14 ") due to egg ner coupling two carriages (14, 14 ', 14") of the first car parameters (BL) of the first trolley (14, 14 ') deviates.

4. Conveying system according to one of the preceding claims, characterized in that one of the two coupled carriages (14, 14 ', 14 ") is due to a technical defect rule lying carriage (14').

5. Conveying system according to one of the preceding claims, characterized in that one of the two coupled carriages (14, 14 ', 14 ") is a tow truck (14").

6. Conveying system according to one of the preceding claims, characterized in that the controller (30) is adapted to that the particular action, which is carried out at the waypoint (66, 68), also the deviation of the second car parameters (NL) taken into account by the first carriage parameter (BL).

7. Conveying system according to one of the preceding claims, characterized in that the two carriages (14, 14 ', 14 ") a trolley controller (46) with a waypoint memory and means (48) for detecting the own position ent long the conveying path (12 ) and the second carriage (14, 14 ") in the waypoint memory stores another waypoint (66, 68) for the particular action.

8. Conveying system according to one of the preceding claims, characterized in that the offset waypoint for the application of emergency driving parameters on the second carriage (14, 14 ") leads.

9. A method for controlling a conveyor system (10) with a) a conveyor line (12), b) at least a first carriage (14, 14 '), which leads its own drive (44) and with this along the conveying path (12) is movable and has a first carriage parameter (BL), and c) a control (30, 46) which, taking into account the first carriage parameter (BL), by means of waypoints (60, 62, 66, 68) along the conveying path (12) triggers different actions, characterized in that the method comprises the steps of:

Providing at least one second carriage (14, 14 ") with a second carriage parameter (NL) departing from the first carriage parameter (BL); - setting at least one waypoint (66, 68) along the transport route (12) on which a certain action is triggered for the second carriage (14, 14 ") to a different position along the conveying path (12) than for the first carriage (14, 14 ').

10. The method according to claim 8, characterized by the following steps: - For towing a due to a technical defect, especially in a hard to reach for operating section (18) of the conveyor track (12), left-behind trolley (14 ') dock another trolley ( 14, 14 ") on the stopped carriage (14 '), whereby the second carriage (14, 14") is realized; - Driving the second trolley (14, 14 ") taking into account the staggered waypoint (66, 68).